Ammonium sulfate crystal drying technology

air stream dryer JG model.jpg

Recommended Dryer Model: JG Series Air Stream Dryer


1. Technology Overview:

One is the ammonium sulfate crystal drying system. The whole process is that the ammonium sulfate solution is first crystallized in the MVR device, and then dried by a centrifuge, then enters the drying device for drying, and then enters the ton bag packaging after drying. The drying device adopts airflow drying, steam heating, and dust removal by cloth bag dust collector. The device contains ton bag packaging. This system can dry ammonium sulfate crystals with a water content of 7% to less than 0.5%, and can process 1400Kg of material per hour; the process pipe fittings and valve materials are 316L stainless steel, which meets the American standard series of pipeline and flange standards.

The second is a filter cake drying system of tetrasodium ethylenediaminetetraacetic acid (NAX). The process flow is that the cake-like wet material passes through an airflow drying device to dry its remaining moisture, and then the NAX solid ton bag is packed. This system can dry NAX wet materials with a water content of 30% to less than 0.8%, and can process 700Kg of materials per hour; the control system adopts DCS centralized control; it can fully realize automatic control, including temperature, liquid level, pressure , Flow, etc.; all rotating equipment can achieve DCS start and stop, and large rotating equipment such as fans and pumps can achieve on-site start and stop.

2. Technology Principle:

The airflow dryer uses the principle of instantaneous drying, using the rapid movement of heated air to drive wet materials and suspend the wet materials in the hot air. This strengthens the entire drying process and increases the rate of heat and mass transfer. The materials and unbound moisture can be almost completely removed (for example: the water content of starch and other materials is less than or equal to 40%, and the output of finished products can be 13.5%), and the dried materials will not deteriorate, and the output is comparable to ordinary dryers. Drying has been significantly improved, and users can achieve higher economic benefits in the short term.

3. Technology Characteristic:

(1).High drying intensity and low investment in equipment: the processing capacity of the airflow drying equipment is large, the capacity to evaporate water is from 50kg/h to 2000kg/h, and the small volume of the equipment, the investment is low, which is unmatched by other drying equipment.

(2).High degree of automation and good product quality: Airflow drying materials are all carried out in the pipeline, and the drying time is extremely short (only 0.5-2 seconds). Therefore, automation can be realized, and the product does not contact the outside with little pollution and good quality.

(3).Complete equipment supply and free choice of heat source: the basic model consists of air filter, heater, feeder, drying tube, fan, and cyclone separator. Users can add dust collectors or other auxiliary equipment as needed.

(4).Regarding the choice of heating method, airflow drying equipment has greater adaptability. Users can choose steam, electricity, thermal oil, hot air furnace heating according to the conditions in the region, and at the same time can choose according to the heat resistance temperature (or hot air temperature) of the material: when ≤150℃, steam heating can be used when ≤200℃ (Or steam heating, electric compensation or heat conduction oil heating); ≤300℃, coal-fired hot blast stove; ≤600℃. Fuel oil stove.Short drying time, suitable for heat-sensitive materials, the finished product does not contact the outside world, good quality.

(5).The equipment is provided in complete sets, and the heat source can be steam heating or supporting coal-fired, oil-fired, gas-fired hot stove, etc.

(6).Basic airflow drying equipment, suitable for loose, low viscosity, finished products are granules and powder materials. This process is shown as negative pressure airflow drying. The user can choose the drying method of positive pressure according to the characteristics of the product.

 4. Dryer working process:


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