Supported Materials
Feed & livestock drying equipment selection: form, heat sensitivity and recommended machine for 34 materials (Feed pellets, Blood meal, Meat and bone meal and others), with the full line configuration and trial run points.
All
Chemical raw materials
Fine chemicals & pigments
Pharmaceuticals & herbal medicine
Pesticides & fertilisers
Inorganic salts
New energy & battery materials
Metallurgy & metal powders
Building materials & minerals
Feed & livestock
Food & agricultural products
Environmental & biomass
Plastics & rubber
Paper & printing
34 material(s) listed for this industry.
Feed & livestock 34 items
| Material | Form | Heat sensitivity | Recommended dryer | Alternative | Selection notes |
|---|---|---|---|---|---|
| Feed pellets | Granular | Moderate | Flash Airflow Dryer | Rotary Dryer |
What really has to be solved in feed drying is the dry shell around a wet core. Once the pellets come out, the surface is already dry while the moisture inside is still there, and they start to go mouldy within days of stacking, which costs more than the energy spent drying them. Our approach is a flash airflow line with a longer equalising section behind it: the pellets are carried quickly by the hot air and the surface sets first, then they spend longer in the equalising section so the internal moisture migrates outward, and it is the two stages together that level the moisture through the pellet. Temperature has to be held: the heat limit of feed is on the material temperature, not the hot air, and protein starts to denature around 60°C, so extend the residence time rather than raise the inlet temperature. The other point that is easy to miss is dust: feed meal is combustible dust, the dust collector has to be selected for combustible dust, and grounding, bonding and explosion venting cannot be skipped. Animal protein lines and ruminant feed lines need to be scheduled separately, with a full clean-down between products.
Detail →
|
| Blood meal | Powder | Heat-sensitive | Flash Airflow Dryer | Electric Heating Dryer |
Blood meal is the most heat sensitive material in this library. The protein starts to denature around 60°C and lysine availability drops with it, and that process cannot be reversed: drying a little more slowly can still be recovered, overshooting the temperature cannot. Blood meal therefore only works on a flash airflow line, where the water is taken out in seconds and the material leaves the drying zone before its own temperature reaches the critical point. The process we use works backwards from the material temperature rather than from the hot air: the air can run at 180°C, and as long as the residence time is short enough the material temperature stays near 60°C. The second difficulty is disintegration. Blood meal carries a lot of water and is very sticky, so the inlet bridges easily, and once it bridges no amount of air gets through: the discharge then swings between too much and too little, too dry and too wet. The lumps have to be broken in the feed section. Dust explosion protection and segregated scheduling are the same as for feed.
Detail →
|
| Meat and bone meal | Granular | Moderate | Rotary Dryer | Batch Rotary Dryer |
High moisture and strong odour; off-gas treatment required. Granules have a higher bulk density than powder, so drum fill can be set more generously than for powder, but room must still be left for the material to tumble. The material tolerates moderate to high temperature for a while but not a long dwell, so the process needs temperature margin built in. The drum route does not care about material form: lumps, paste and fibre all go in, at the cost of a large footprint and high initial investment. Granules rub against each other inside the drum, so a material with a high fine fraction also means thinking about drum liners and discharge-end dust collection. The alternative is a batch rotary dryer, which is the route to switch to when batches are small, products are mixed and changeover is frequent. Do not describe the material only as powder or granules: give the measured moisture and bulk density for meat and bone meal, because two materials of the same form can differ by a whole machine size.
|
| Fish meal | Powder | Heat-sensitive | Flash Airflow Dryer | Electric Heating Dryer |
Fish meal and blood meal are two versions of the same problem: both are animal protein, both are heat sensitive, and both carry a lot of water and stickiness. Fish meal differs in its oil content, which brings two extra difficulties. First, a film of oil forms on the surface during drying and blocks vapour from moving out of the particle, so hot air alone struggles to get through. Second, that oil is combustible and the dust concentration is high, so the dust collection system has to be specified at the strictest explosion protection level. Our standard configuration is therefore a flash airflow line, with the residence time compressed to seconds so the vapour leaves before the oil seals the surface. Temperature is again controlled by the material temperature: protein denaturation is more damaging than oil oxidation, so protecting quality comes first. Where throughput is very large, or the oil content is high enough to need a longer residence time, a rotary drum becomes an option, but then oil building up on the drum wall has to be solved as well.
Detail →
|
| Feather meal | Powder | Moderate | Batch Rotary Dryer | Rotary Dryer |
High moisture after hydrolysis; dewater before drying. If the powder is still wet when it enters the machine it will ball up in the conveying section; by the time it reaches the heat exchange zone it has to be loose, or even good hot air cannot move it. The material tolerates moderate to high temperature for a while but not a long dwell, so the process needs temperature margin built in. A batch dryer handles one batch at a time, so throughput is limited by batch charge and cycle time, but every batch can be temperature controlled and recorded on its own. Powder that sits for long enough will bridge, so the feed end needs a breaker or forced feeding; every blockage stops the line. The alternative is a rotary dryer, which is the route to switch to when the material needs a longer residence time or the line is scaling up to tens of tonnes a day. Do not describe the material only as powder or granules: give the measured moisture and bulk density for feather meal, because two materials of the same form can differ by a whole machine size.
|
| Soybean dregs | Paste | Heat-sensitive | Rotary Dryer | Batch Rotary Dryer |
Very high initial moisture; mechanical dewatering before thermal drying. Paste cannot be carried by hot air at all; the route is to dewater it mechanically to a moisture level it can be conveyed at, and only then apply heat. Heat sensitive material has a narrow process window, so inlet temperature and residence time can only be set conservatively and throughput usually has to be raised later, once trial run data is in. Throughput on a drum is set by working volume and residence time together, so the denser and more solid the material, the more the drum can hold. If the front end dewatering equipment is not matched, the economics of the whole line are gone; the capital in mechanical dewatering has to be counted together with the heat drying behind it. The alternative is a batch rotary dryer, which is the route to switch to when batches are small, products are mixed and changeover is frequent. Do not describe the material only as powder or granules: give the measured moisture and bulk density for soybean dregs, because two materials of the same form can differ by a whole machine size.
|
| Distillers grains | Granular | Moderate | Rotary Dryer | Batch Rotary Dryer |
Sticky and wet; preventing wall build-up is the key selection point. Granules have a higher bulk density than powder, so drum fill can be set more generously than for powder, but room must still be left for the material to tumble. The material tolerates moderate to high temperature for a while but not a long dwell, so the process needs temperature margin built in. The drum route does not care about material form: lumps, paste and fibre all go in, at the cost of a large footprint and high initial investment. Granules rub against each other inside the drum, so a material with a high fine fraction also means thinking about drum liners and discharge-end dust collection. The alternative is a batch rotary dryer, which is the route to switch to when batches are small, products are mixed and changeover is frequent. Do not describe the material only as powder or granules: give the measured moisture and bulk density for distillers grains, because two materials of the same form can differ by a whole machine size.
|
| Corn gluten meal | Powder | Moderate | Flash Airflow Dryer | Rotary Dryer |
Protein is temperature-sensitive; cap the material temperature. Powder has a low bulk density and takes up a lot of volume for the same weight, so drum size is usually worked out backwards from the throughput rather than from the material. It is a material that can be heated but must not be baked, so the set temperature needs margin, and final moisture depends on moisture temperature and drying intensity as well. A flash airflow dryer completes heat transfer between the hot air and the material in a few seconds inside the duct, so residence time is measured in seconds and heat sensitive material should go this way. Powder that sits for long enough will bridge, so the feed end needs a breaker or forced feeding; every blockage stops the line. The alternative is a rotary dryer, which is the route to switch to when the material needs a longer residence time or the line is scaling up to tens of tonnes a day. Send a sample with the enquiry. The moisture and bulk density of the actual corn gluten meal decide the machine size far more than the name does.
|
| Feed premix | Powder | Heat-sensitive | Flash Airflow Dryer | Batch Rotary Dryer |
Trace components are heat-sensitive; close temperature control required. Powder has a low bulk density and takes up a lot of volume for the same weight, so drum size is usually worked out backwards from the throughput rather than from the material. Overshooting the heat limit is not recoverable: it is not that the material dries more slowly, it is that the quality is written off, so it is better to protect the temperature than to protect the output. A flash airflow dryer completes heat transfer between the hot air and the material in a few seconds inside the duct, so residence time is measured in seconds and heat sensitive material should go this way. Local overheating is the danger with heat sensitive powder: a layer stuck to the wall keeps heating one spot, so the flights and the air volume have to keep the bed from clinging. The alternative is a batch rotary dryer, which is the route to switch to when batches are small, products are mixed and changeover is frequent. When ordering, ask for feed premix by name and give the actual moisture and bulk density of the incoming material, so the machine size can be fixed in one pass.
|
| Forage grass | Fibrous | Heat-sensitive | Batch Rotary Dryer | Rotary Dryer |
Bulky fibrous material; needs a longer, low-temperature dry. Fibrous material can be dried hard, but too much air velocity pulls the fine fibres out with the gas, so the dust collection load has to be calculated in advance. The heating time for this material is measured in seconds; the hot air can run hot, but the material temperature itself has to be held down, because past the threshold it discolours, denatures or cakes. A batch dryer handles one batch at a time, so throughput is limited by batch charge and cycle time, but every batch can be temperature controlled and recorded on its own. Fibre that overheats turns brittle and scorches, so the air temperature needs real margin. The alternative is a rotary dryer, which is the route to switch to when the material needs a longer residence time or the line is scaling up to tens of tonnes a day. If the incoming grade of forage grass is not the one quoted before, the parameters have to be given again rather than carried over from an earlier order.
|
| Shrimp meal | Powder | Heat-sensitive | Flash Airflow Dryer | Electric Heating Dryer |
Protein and flavour are heat-sensitive; short exposure is safer. If the powder is still wet when it enters the machine it will ball up in the conveying section; by the time it reaches the heat exchange zone it has to be loose, or even good hot air cannot move it. The heating time for this material is measured in seconds; the hot air can run hot, but the material temperature itself has to be held down, because past the threshold it discolours, denatures or cakes. The advantages of flash are the short heating time and the minimal mechanical action on the material; the cost is that throughput is capped by air volume and duct size, and very large lines still need a drum. Local overheating is the danger with heat sensitive powder: a layer stuck to the wall keeps heating one spot, so the flights and the air volume have to keep the bed from clinging. The alternative is an electrically heated dryer, which is the route to switch to where gas is inconvenient or there is a hard requirement on cleanliness and open flame. Do not describe the material only as powder or granules: give the measured moisture and bulk density for shrimp meal, because two materials of the same form can differ by a whole machine size.
|
| Bone meal | Powder | Moderate | Batch Rotary Dryer | Rotary Dryer |
Fat content spoils; degrease first or dry quickly. If the powder is still wet when it enters the machine it will ball up in the conveying section; by the time it reaches the heat exchange zone it has to be loose, or even good hot air cannot move it. The material tolerates moderate to high temperature for a while but not a long dwell, so the process needs temperature margin built in. A batch dryer handles one batch at a time, so throughput is limited by batch charge and cycle time, but every batch can be temperature controlled and recorded on its own. Powder that sits for long enough will bridge, so the feed end needs a breaker or forced feeding; every blockage stops the line. The alternative is a rotary dryer, which is the route to switch to when the material needs a longer residence time or the line is scaling up to tens of tonnes a day. Do not describe the material only as powder or granules: give the measured moisture and bulk density for bone meal, because two materials of the same form can differ by a whole machine size.
|
| Eggshell powder | Granular | Not heat-sensitive | Rotary Dryer | Batch Rotary Dryer |
Dewater first, then dry; add milling and screening after discharge. Granules can be carried by hot air or lifted by the flights inside a drum, so the route comes down to throughput scale and to how strong the granules are. There is little restriction on temperature for this material; the real constraints are throughput and energy cost, so the process parameters can be opened up a little. Throughput on a drum is set by working volume and residence time together, so the denser and more solid the material, the more the drum can hold. With a wide size spread the short path wins: fines leave first and coarse material follows, and the moisture spreads out as a result. The alternative is a batch rotary dryer, which is the route to switch to when batches are small, products are mixed and changeover is frequent. When ordering, ask for eggshell powder by name and give the actual moisture and bulk density of the incoming material, so the machine size can be fixed in one pass.
|
| Silkworm pupa meal | Powder | Heat-sensitive | Flash Airflow Dryer | Electric Heating Dryer |
High oil content, prone to oxidation; dry fast at low temperature. Powder moves only if the hot air carries it, so what decides the route is whether the air has enough momentum and whether the duct is sized right, not whether the material flows by itself. Heat sensitive material has a narrow process window, so inlet temperature and residence time can only be set conservatively and throughput usually has to be raised later, once trial run data is in. An airflow line is demanding about the state of the feed: what enters must already be a granule or powder that can be conveyed, because too much moisture makes it cake in the conveying section. Local overheating is the danger with heat sensitive powder: a layer stuck to the wall keeps heating one spot, so the flights and the air volume have to keep the bed from clinging. The alternative is an electrically heated dryer, which is the route to switch to where gas is inconvenient or there is a hard requirement on cleanliness and open flame. When ordering, ask for silkworm pupa meal by name and give the actual moisture and bulk density of the incoming material, so the machine size can be fixed in one pass.
|
| Feed yeast | Powder | Heat-sensitive | Flash Airflow Dryer | Electric Heating Dryer |
Activity must be preserved; low-temperature flash drying. Powder has a low bulk density and takes up a lot of volume for the same weight, so drum size is usually worked out backwards from the throughput rather than from the material. Overshooting the heat limit is not recoverable: it is not that the material dries more slowly, it is that the quality is written off, so it is better to protect the temperature than to protect the output. A flash airflow dryer completes heat transfer between the hot air and the material in a few seconds inside the duct, so residence time is measured in seconds and heat sensitive material should go this way. Local overheating is the danger with heat sensitive powder: a layer stuck to the wall keeps heating one spot, so the flights and the air volume have to keep the bed from clinging. The alternative is an electrically heated dryer, which is the route to switch to where gas is inconvenient or there is a hard requirement on cleanliness and open flame. Send a sample with the enquiry. The moisture and bulk density of the actual feed yeast decide the machine size far more than the name does.
|
| Wheat bran | Flake | Moderate | Rotary Dryer | Flash Airflow Dryer |
Light flakes; air volume and drum size must be matched. Flakes bridge easily, so the feed section needs a disintegrator or forced feeding; once the material balls up and blocks the inlet, the best hot air in the building is wasted. The material tolerates moderate to high temperature for a while but not a long dwell, so the process needs temperature margin built in. The drum route does not care about material form: lumps, paste and fibre all go in, at the cost of a large footprint and high initial investment. Flakes stick together into lumps, so both the feed section and the flight pattern have to be matched to how strong the flakes are. The alternative is a flash airflow dryer, which is the route to switch to when throughput is modest and the material needs a shorter heating time. Do not describe the material only as powder or granules: give the measured moisture and bulk density for wheat bran, because two materials of the same form can differ by a whole machine size.
|
| Soybean meal | Powder | Moderate | Flash Airflow Dryer | Rotary Dryer |
Protein is temperature-sensitive; cap the material temperature. If the powder is still wet when it enters the machine it will ball up in the conveying section; by the time it reaches the heat exchange zone it has to be loose, or even good hot air cannot move it. The material tolerates moderate to high temperature for a while but not a long dwell, so the process needs temperature margin built in. The advantages of flash are the short heating time and the minimal mechanical action on the material; the cost is that throughput is capped by air volume and duct size, and very large lines still need a drum. Powder that sits for long enough will bridge, so the feed end needs a breaker or forced feeding; every blockage stops the line. The alternative is a rotary dryer, which is the route to switch to when the material needs a longer residence time or the line is scaling up to tens of tonnes a day. Do not describe the material only as powder or granules: give the measured moisture and bulk density for soybean meal, because two materials of the same form can differ by a whole machine size.
|
| Peanut meal | Powder | Moderate | Flash Airflow Dryer | Rotary Dryer |
Oil content turns rancid; dry quickly at low temperature. If the powder is still wet when it enters the machine it will ball up in the conveying section; by the time it reaches the heat exchange zone it has to be loose, or even good hot air cannot move it. The material tolerates moderate to high temperature for a while but not a long dwell, so the process needs temperature margin built in. The advantages of flash are the short heating time and the minimal mechanical action on the material; the cost is that throughput is capped by air volume and duct size, and very large lines still need a drum. Powder that sits for long enough will bridge, so the feed end needs a breaker or forced feeding; every blockage stops the line. The alternative is a rotary dryer, which is the route to switch to when the material needs a longer residence time or the line is scaling up to tens of tonnes a day. Do not describe the material only as powder or granules: give the measured moisture and bulk density for peanut meal, because two materials of the same form can differ by a whole machine size.
|
| Rapeseed meal | Powder | Moderate | Rotary Dryer | Flash Airflow Dryer |
Control temperature to avoid excessive protein denaturation. If the powder is still wet when it enters the machine it will ball up in the conveying section; by the time it reaches the heat exchange zone it has to be loose, or even good hot air cannot move it. The material tolerates moderate to high temperature for a while but not a long dwell, so the process needs temperature margin built in. The drum route does not care about material form: lumps, paste and fibre all go in, at the cost of a large footprint and high initial investment. Powder that sits for long enough will bridge, so the feed end needs a breaker or forced feeding; every blockage stops the line. The alternative is a flash airflow dryer, which is the route to switch to when throughput is modest and the material needs a shorter heating time. When ordering, ask for rapeseed meal by name and give the actual moisture and bulk density of the incoming material, so the machine size can be fixed in one pass.
|
| Cottonseed meal | Powder | Moderate | Rotary Dryer | Flash Airflow Dryer |
As above; watch the material temperature limit. If the powder is still wet when it enters the machine it will ball up in the conveying section; by the time it reaches the heat exchange zone it has to be loose, or even good hot air cannot move it. The material tolerates moderate to high temperature for a while but not a long dwell, so the process needs temperature margin built in. The drum route does not care about material form: lumps, paste and fibre all go in, at the cost of a large footprint and high initial investment. Powder that sits for long enough will bridge, so the feed end needs a breaker or forced feeding; every blockage stops the line. The alternative is a flash airflow dryer, which is the route to switch to when throughput is modest and the material needs a shorter heating time. If the incoming grade of cottonseed meal is not the one quoted before, the parameters have to be given again rather than carried over from an earlier order.
|
| Corn germ meal | Powder | Moderate | Rotary Dryer | Flash Airflow Dryer |
High fat content; cool and pack promptly after drying. Powder moves only if the hot air carries it, so what decides the route is whether the air has enough momentum and whether the duct is sized right, not whether the material flows by itself. At high temperature this material loses water first and discolours later, so holding the temperature is enough, but the combination of temperature and time still has to be confirmed by trial run. Throughput on a drum is set by working volume and residence time together, so the denser and more solid the material, the more the drum can hold. Powder that sits for long enough will bridge, so the feed end needs a breaker or forced feeding; every blockage stops the line. The alternative is a flash airflow dryer, which is the route to switch to when throughput is modest and the material needs a shorter heating time. Send a sample with the enquiry. The moisture and bulk density of the actual corn germ meal decide the machine size far more than the name does.
|
| DDGS | Granular | Moderate | Rotary Dryer | Batch Rotary Dryer |
Sticky and wet; preventing wall build-up is the key selection point. Particle size distribution decides two things: particles that are too big will not be carried, and particles that are too fine get pulled out of the drum by the air velocity, so screening and classification often have to be planned in advance. It is a material that can be heated but must not be baked, so the set temperature needs margin, and final moisture depends on moisture temperature and drying intensity as well. A rotary dryer lifts and drops the material repeatedly with flights to form a curtain, so the material stays inside for minutes to tens of minutes, which suits heavy, heat tolerant material. Granules rub against each other inside the drum, so a material with a high fine fraction also means thinking about drum liners and discharge-end dust collection. The alternative is a batch rotary dryer, which is the route to switch to when batches are small, products are mixed and changeover is frequent. Send a sample with the enquiry. The moisture and bulk density of the actual DDGS decide the machine size far more than the name does.
|
| Whey powder | Powder | Heat-sensitive | Flash Airflow Dryer | Batch Rotary Dryer |
Heat-sensitive and hygroscopic; tighten the temperature limit. If the powder is still wet when it enters the machine it will ball up in the conveying section; by the time it reaches the heat exchange zone it has to be loose, or even good hot air cannot move it. The heating time for this material is measured in seconds; the hot air can run hot, but the material temperature itself has to be held down, because past the threshold it discolours, denatures or cakes. The advantages of flash are the short heating time and the minimal mechanical action on the material; the cost is that throughput is capped by air volume and duct size, and very large lines still need a drum. Local overheating is the danger with heat sensitive powder: a layer stuck to the wall keeps heating one spot, so the flights and the air volume have to keep the bed from clinging. The alternative is a batch rotary dryer, which is the route to switch to when batches are small, products are mixed and changeover is frequent. If the incoming grade of whey powder is not the one quoted before, the parameters have to be given again rather than carried over from an earlier order.
|
| Aquatic feed pellets | Granular | Moderate | Flash Airflow Dryer | Rotary Dryer |
Low granule strength; conveying and tumbling must be gentle. Granules have a higher bulk density than powder, so drum fill can be set more generously than for powder, but room must still be left for the material to tumble. The material tolerates moderate to high temperature for a while but not a long dwell, so the process needs temperature margin built in. The advantages of flash are the short heating time and the minimal mechanical action on the material; the cost is that throughput is capped by air volume and duct size, and very large lines still need a drum. Granules rub against each other inside the drum, so a material with a high fine fraction also means thinking about drum liners and discharge-end dust collection. The alternative is a rotary dryer, which is the route to switch to when the material needs a longer residence time or the line is scaling up to tens of tonnes a day. Do not describe the material only as powder or granules: give the measured moisture and bulk density for aquatic feed pellets, because two materials of the same form can differ by a whole machine size.
|
| Swine feed pellets | Granular | Moderate | Flash Airflow Dryer | Rotary Dryer |
Case-hardening with a wet core is common; extend effective contact time. Granules have a higher bulk density than powder, so drum fill can be set more generously than for powder, but room must still be left for the material to tumble. The material tolerates moderate to high temperature for a while but not a long dwell, so the process needs temperature margin built in. The advantages of flash are the short heating time and the minimal mechanical action on the material; the cost is that throughput is capped by air volume and duct size, and very large lines still need a drum. Granules rub against each other inside the drum, so a material with a high fine fraction also means thinking about drum liners and discharge-end dust collection. The alternative is a rotary dryer, which is the route to switch to when the material needs a longer residence time or the line is scaling up to tens of tonnes a day. Do not describe the material only as powder or granules: give the measured moisture and bulk density for swine feed pellets, because two materials of the same form can differ by a whole machine size.
|
| Poultry feed pellets | Granular | Moderate | Flash Airflow Dryer | Rotary Dryer |
As above; watch the particle breakage rate. Granules have a higher bulk density than powder, so drum fill can be set more generously than for powder, but room must still be left for the material to tumble. The material tolerates moderate to high temperature for a while but not a long dwell, so the process needs temperature margin built in. The advantages of flash are the short heating time and the minimal mechanical action on the material; the cost is that throughput is capped by air volume and duct size, and very large lines still need a drum. Granules rub against each other inside the drum, so a material with a high fine fraction also means thinking about drum liners and discharge-end dust collection. The alternative is a rotary dryer, which is the route to switch to when the material needs a longer residence time or the line is scaling up to tens of tonnes a day. If the incoming grade of poultry feed pellets is not the one quoted before, the parameters have to be given again rather than carried over from an earlier order.
|
| Pet food pellets | Granular | Moderate | Flash Airflow Dryer | Rotary Dryer |
The formulation contains oils; control temperature to prevent surface oiling. Granules have a higher bulk density than powder, so drum fill can be set more generously than for powder, but room must still be left for the material to tumble. The material tolerates moderate to high temperature for a while but not a long dwell, so the process needs temperature margin built in. The advantages of flash are the short heating time and the minimal mechanical action on the material; the cost is that throughput is capped by air volume and duct size, and very large lines still need a drum. Granules rub against each other inside the drum, so a material with a high fine fraction also means thinking about drum liners and discharge-end dust collection. The alternative is a rotary dryer, which is the route to switch to when the material needs a longer residence time or the line is scaling up to tens of tonnes a day. Send a sample with the enquiry. The moisture and bulk density of the actual pet food pellets decide the machine size far more than the name does.
|
| Calf milk replacer | Powder | Heat-sensitive | Flash Airflow Dryer | Batch Rotary Dryer |
Heat-sensitive and hygroscopic; seal immediately after discharge. Powder moves only if the hot air carries it, so what decides the route is whether the air has enough momentum and whether the duct is sized right, not whether the material flows by itself. Heat sensitive material has a narrow process window, so inlet temperature and residence time can only be set conservatively and throughput usually has to be raised later, once trial run data is in. An airflow line is demanding about the state of the feed: what enters must already be a granule or powder that can be conveyed, because too much moisture makes it cake in the conveying section. Local overheating is the danger with heat sensitive powder: a layer stuck to the wall keeps heating one spot, so the flights and the air volume have to keep the bed from clinging. The alternative is a batch rotary dryer, which is the route to switch to when batches are small, products are mixed and changeover is frequent. Send a sample with the enquiry. The moisture and bulk density of the actual calf milk replacer decide the machine size far more than the name does.
|
| Starch residue | Granular | Not heat-sensitive | Rotary Dryer | Flash Airflow Dryer |
High moisture; mechanical dewatering before thermal drying. Granules have a higher bulk density than powder, so drum fill can be set more generously than for powder, but room must still be left for the material to tumble. The material itself is heat tolerant, so the ceiling comes from the equipment and from by-products rather than from the material, which means heat can be supplied generously and throughput pushed up. The drum route does not care about material form: lumps, paste and fibre all go in, at the cost of a large footprint and high initial investment. With a wide size spread the short path wins: fines leave first and coarse material follows, and the moisture spreads out as a result. The alternative is a flash airflow dryer, which is the route to switch to when throughput is modest and the material needs a shorter heating time. If the incoming grade of starch residue is not the one quoted before, the parameters have to be given again rather than carried over from an earlier order.
|
| Fruit residue | Granular | Moderate | Rotary Dryer | Flash Airflow Dryer |
High moisture; dewater first, control temperature to avoid scorching. Granules can be carried by hot air or lifted by the flights inside a drum, so the route comes down to throughput scale and to how strong the granules are. At high temperature this material loses water first and discolours later, so holding the temperature is enough, but the combination of temperature and time still has to be confirmed by trial run. Throughput on a drum is set by working volume and residence time together, so the denser and more solid the material, the more the drum can hold. Granules rub against each other inside the drum, so a material with a high fine fraction also means thinking about drum liners and discharge-end dust collection. The alternative is a flash airflow dryer, which is the route to switch to when throughput is modest and the material needs a shorter heating time. Send a sample with the enquiry. The moisture and bulk density of the actual fruit residue decide the machine size far more than the name does.
|
| Soy sauce residue | Granular | Moderate | Rotary Dryer | Flash Airflow Dryer |
Salt content; 304 or 316L stainless recommended for product-contact parts. Granules have a higher bulk density than powder, so drum fill can be set more generously than for powder, but room must still be left for the material to tumble. The material tolerates moderate to high temperature for a while but not a long dwell, so the process needs temperature margin built in. The drum route does not care about material form: lumps, paste and fibre all go in, at the cost of a large footprint and high initial investment. Granules rub against each other inside the drum, so a material with a high fine fraction also means thinking about drum liners and discharge-end dust collection. The alternative is a flash airflow dryer, which is the route to switch to when throughput is modest and the material needs a shorter heating time. Do not describe the material only as powder or granules: give the measured moisture and bulk density for soy sauce residue, because two materials of the same form can differ by a whole machine size.
|
| Fishery by-product | Granular | Moderate | Rotary Dryer | Flash Airflow Dryer |
High moisture; process promptly to avoid spoilage. Granules can be carried by hot air or lifted by the flights inside a drum, so the route comes down to throughput scale and to how strong the granules are. At high temperature this material loses water first and discolours later, so holding the temperature is enough, but the combination of temperature and time still has to be confirmed by trial run. Throughput on a drum is set by working volume and residence time together, so the denser and more solid the material, the more the drum can hold. Granules rub against each other inside the drum, so a material with a high fine fraction also means thinking about drum liners and discharge-end dust collection. The alternative is a flash airflow dryer, which is the route to switch to when throughput is modest and the material needs a shorter heating time. Send a sample with the enquiry. The moisture and bulk density of the actual fishery by-product decide the machine size far more than the name does.
|
| Leaf meal | Flake | Moderate | Rotary Dryer | Flash Airflow Dryer |
Bulky and light; feed rate needs control. Flakes are not afraid of heat, they are afraid of being crushed and folded; every contact between equipment and material can leave a reject. At high temperature this material loses water first and discolours later, so holding the temperature is enough, but the combination of temperature and time still has to be confirmed by trial run. Throughput on a drum is set by working volume and residence time together, so the denser and more solid the material, the more the drum can hold. Flakes stick together into lumps, so both the feed section and the flight pattern have to be matched to how strong the flakes are. The alternative is a flash airflow dryer, which is the route to switch to when throughput is modest and the material needs a shorter heating time. When ordering, ask for leaf meal by name and give the actual moisture and bulk density of the incoming material, so the machine size can be fixed in one pass.
|
| Fish scale | Flake | Moderate | Rotary Dryer |
Flaky and perishable; must be processed promptly. Flakes are not afraid of heat, they are afraid of being crushed and folded; every contact between equipment and material can leave a reject. At high temperature this material loses water first and discolours later, so holding the temperature is enough, but the combination of temperature and time still has to be confirmed by trial run. Throughput on a drum is set by working volume and residence time together, so the denser and more solid the material, the more the drum can hold. Flakes stick together into lumps, so both the feed section and the flight pattern have to be matched to how strong the flakes are. The process route is fairly specialised and there is little room to switch equipment, so the configuration has to be right the first time. If the incoming grade of fish scale is not the one quoted before, the parameters have to be given again rather than carried over from an earlier order.
|
Recommendations above are a selection direction based on material form, heat sensitivity and throughput. Capacity varies with the material, the initial moisture content and the target final moisture, and the formal figures come from a trial run.
Four steps to a selectionHow to choose
- Material form Powder, granule and flake material can be carried in an air stream; blocky, paste-like and fibrous material has to be tumbled inside a drum.
- Heat sensitivity This comes first. Where the material is heat-sensitive and its form allows air conveying, a flash airflow dryer is the natural choice — regardless of output, because exposure to heat is measured in seconds. Material that tolerates heat can be dried more slowly and at lower cost.
- Throughput and budget Where budget and batch size matter more than output, a batch rotary dryer carries relatively low capital cost and suits a small plant or workshop. For high output, a continuous rotary dryer feeds and discharges at the same time and runs non-stop.
- Environment and energy Where emissions are constrained or there is no steam supply, electric and electromagnetic heating avoids an open flame and responds faster.
Where the material is corrosive (acidic, chloride-bearing, saline and so on), the parts in contact can be specified in stainless steel: 201 / 304 / 316L / 430 / 2205 duplex and other grades to order.
Need a selection based on your material?
Tell us the material, initial moisture content and target final moisture, and we will propose a configuration that fits.
+8615238028609
Material · Selection · Trial run