Agricultural product low-temperature negative-pressure drying and crushing integrated method and system

Abstract

The invention discloses an agricultural product low-temperature negative-pressure drying and crushing integrated method and a system. The agricultural product low-temperature negative-pressure dryingand crushing integrated method comprises the following steps that (1) under the conditions of the negative pressure and the low temperature, agricultural products are subjected to turbulent-flow heating by reverse hot air in the process of moving from top to bottom under the self-weight action, then the agricultural products are cut and impacted, and after the agricultural products are crushed into agricultural product powder, the agricultural product powder ascends along with airflow to form a turbulent flow and is subjected to severe heat exchanging, so that the agricultural product powder is quickly dried; (2) under the conditions of the negative pressure and the low temperature, the agricultural product powder continuously ascends along with the airflow to be subjected to rotational-flow drying, so that the agricultural product powder is further subjected to heat exchanging drying; (3) gas-solid separation is conducted, and the dried agricultural product powder and tail gas are separated; and (4) under the conditions of the negative pressure and the low temperature, the tail gas is subjected to dust removing treatment, remained parts of the dried agricultural product powder arecollected. The agricultural product low-temperature negative-pressure drying and crushing integrated method and the system can realize quick drying and crushing of the agricultural products, and hasthe advantages that the system is saving in energy, quick in start-up, controllable in scale, reliable in industrialization, easy to operate, simple in system and the like.

Description

technical field [0001] The invention relates to drying technology, in particular to an integrated method of low-temperature negative pressure drying and crushing of agricultural products and a system thereof. Background technique [0002] For agricultural products, including sorghum, rice, peanuts, corn, wheat, and local specialties in various regions, drying is an important means of processing and preservation of agricultural products, and it is widely used in agricultural product processing and production. Among them, grain and oil crops include wheat, rice (including japonica, indica, and Yuangu), soybeans, miscellaneous grains (including corn, mung bean, red bean, broad bean, pea, buckwheat, barley, barley, oats, sorghum, millet, rice Kernel), fresh potato, peanut kernel, sesame, rapeseed, cottonseed, sunflower seed, castor bean, palm seed, etc. The processing methods of these products are mainly drying, crushing or milling; tobacco leaves, raw tea, etc. need to be dried...

AI Technical Summary

Problems solved by technology

The existing drying equipment mainly uses solar energy, steam or firewood as energy for drying. The existing drying equipment for agricultural products has the following defects: 1) The solar drying equipment needs sunshine and cannot work in rainy seasons; 2) The use of steam equipment is unsafe and the cost is high; 3) The temperature control of firewood and coal drying equipment is unstable, which is easy to cause product damage, and soot pollutes the product; 4) For agricultural products that need to be crushed or milled, such as: rice, peanuts, peppers, pepper, pepper, coffee, etc. Drying first, then crushing or powdering, there are problems of long process flow and low processing efficiency

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