Henan Jinyida Machinery Equipment Manufacturing Co., Ltd.

A few points need to be clear about capacity figures:

1. Capacity is not a fixed value. The same machine will produce different figures for a different material, a different initial moisture content or a different target final moisture.

2. Figures must state whether they are on a dry basis or a wet basis. Dry basis means the mass of bone-dry material; wet basis includes the moisture. The two differ substantially and the ambiguity causes problems if it is not stated.

3. Official data comes from a trial run. Until the operating parameters are fixed, any capacity figure is only an order of magnitude.

4. Air volume can be stated precisely. It is fixed by the machine size, does not change with the material and can be given at the selection stage.

Providing the material name, the initial moisture content and the target final moisture is what makes a recommendation usable.

The two have different structures and suit different duties:

Flash airflow dryer

It dewaters through brief contact between high-temperature air and the material. Drying is fast, which suits inorganic salts and chemical powders that need rapid dewatering. Sizes are Φ220, Φ280, Φ325, Φ400, Φ500 and Φ600.

Rotary dryer

The rotating drum tumbles the material for more even heating. It suits sawdust, plastic pellets and flake materials that do not break up while tumbling.

How to decide

Look at the material form and whether it is sticky. Powders and fast-dewatering duties point to flash airflow; granular or flake materials needing even heating point to rotary. The moisture content and target final moisture still have to be considered.

The choice mainly follows the site energy supply:

Steam heating

Suits plants that already have a boiler or steam piping. Running cost is relatively lower and it fits long continuous production.

Electric / electromagnetic heating

Suits sites with no steam supply, requiring no piping, with flexible deployment and fast start-up. The electromagnetic series handles roughly 200–5000 kg/h, provided the electrical capacity matches.

How to decide

Check whether a boiler exists, whether electrical capacity is sufficient, and which running cost is lower over time. With adequate power and no steam, electric heating is the simpler choice.

Equipment is built to suit the operating conditions. Lead time depends mainly on the machine size and how complex the configuration is, and scheduling is arranged once the requirement is clear.

The parameters to provide in advance are: material name and properties, initial moisture content, target final moisture, daily throughput, and the available space and energy supply (electrical capacity or steam parameters).

The clearer the parameters, the more accurate the selection and quotation, and the easier the schedule. If they are not yet clear, a small trial run is the usual way to establish them.

Powders such as battery-grade lithium powder and aluminium powder have strict batch consistency requirements. Two approaches are common:

Batch dryer

Charges, dries, cools and discharges in cycles, with controlled time and temperature per batch and small variation between batches. Suits small volumes and frequent product changes.

Flash airflow dryer

Continuous operation with fast dewatering, suiting high-volume continuous production.

Note

Powders are generally hygroscopic and easily airborne, and aluminium powder also needs explosion protection and temperature control. These conditions should be raised with the manufacturer at the selection stage.

The price depends on the configuration, and the configuration depends on the operating conditions, so the same type of machine can differ substantially in price between applications. The main factors are:

Machine size

Drying tube diameter or drum size, material of construction (carbon steel or stainless steel) and wall thickness form the main part of the price.

Heat source

Steam, electric heating, electromagnetic heating and natural gas require noticeably different ancillary equipment and therefore carry different prices.

Ancillary equipment

Fans, dust collectors, feed and discharge conveyors, control cabinets and any explosion protection requirement all enter the total price.

How to obtain an accurate quotation

Provide the material name and form, initial moisture content, target final moisture, daily throughput and the site heat source conditions, and a corresponding configuration and quotation can be given. If the parameters are incomplete, a directional range is possible first.