All products of Zhongfa Machinery are made of high-quality raw materials to ensure the safety, hygiene, and energy efficiency of our equipment. We specialize in productionCleaning equipment, jujube processing equipment, clean vegetable production line, Pickled vegetables processing line, meat processing equipmentOur main products include various vegetable and fruit cleaning machines, fully automatic air drying machines, dryers, grading and screening machines, pasteurization assembly lines, bag washing machines, basket washing machines, vacuum packaging machines, smoking ovens, fish and meat harvesting machines, deep frying machines, sandwich pots, rolling and kneading machines, chopping and mixing machines, filling machines, meat grinders, enema machines, meatball machines, conveyor elevators, etc. We sincerely welcome users from all over the country to purchase our products with high-quality and reliable product quality, superior product performance, and reasonable prices.

Working principle of multi-layer dryer:
The materials in the hopper of the dryer are evenly spread on the mesh belt by the feeder. The mesh belt is made of 12-60 mesh stainless steel wire mesh and is dragged by the transmission device to move inside the dryer. The drying section consists of several units, each with independent hot air circulation. Some of the exhaust gas is discharged by a dedicated dehumidification fan, and the exhaust volume of each unit is controlled by a regulating valve. In the upper circulation unit, the air from the circulation fan enters the lower chamber of the unit through the side air duct, and the airflow is heated by the heat exchanger and distributed by the distributor. Blows into a jet stream towards the mesh belt, passes through the material, and enters the upper chamber. The drying process is the process of hot air passing through the material layer, completing the transfer of heat and mass. The upper chamber is connected to the inlet of the fan through an air duct, where most of the gas and fluid circulate. A portion of the gas with lower temperature and higher humidity content is discharged as exhaust gas through the dehumidification pipe, regulating valve, and jumping fan. In the lower circulation unit, the air from the circulating fan first enters the upper chamber, is heated by the heat exchanger downwards, passes through the material layer and enters the lower chamber. The lower chamber is connected to the fan inlet by a side air duct and a return air duct, and most of the gas circulates while a portion is discharged. The upper and lower loop units can be flexibly equipped according to user needs, and the number of units can also be selected as needed.

Advantages of multi-layer dryer technology:
Suitable for large-scale production of difficult to dry materials with low drying rates, the equipment has a compact structure, small footprint, simple operation, easy maintenance, and stable operation. Different forms of hot air circulation drying can be designed according to the drying characteristics of materials, which is an extension and improvement of hot air circulation ovens, widely used in metallurgical additives, chemical industry, food, packaging and other fields. With the advancement of enterprise technology and the improvement of product technology content, multi-layer belt dryers have the ability to meet large-scale production, diversification, centralized control, and continuous production needs. It has the advantages of high efficiency, energy saving, and easy management.