Belt-type temperature-variable type grain heat pump drying device

Abstract

The invention provides a belt-type temperature-variable type grain heat pump drying device which comprises at least three drying modules which are connected in sequence. Each drying module comprises a heat pump system, an air flue system connected with the heat pump system and a drying channel connected with an air supply opening and an air return opening of the air flue system. By means of the belt-type temperature-variable type grain heat pump drying device, the phenomenon of grain crack can be effectively prevented, quality of dried grains is improved, and the yield of the dried grains is raised; cooling is conducted directly after the grains are dried, and the defects that natural ventilation cooling time is long, and the grains absorb environmental moisture are overcome; time is saved, work efficiency is improved, the grains are dried in a layered manner in the drying channel, space can be effectively utilized, quality of the grains is improved, and the yield of the grains is raised.

Description

technical field [0001] The invention belongs to the field of grain drying and relates to a heat pump grain drying device. Background technique [0002] In the past, grain drying equipment usually used coal, wood, natural gas, etc. in boilers as heat sources to dry grain, which not only wastes energy but also produces pollutants such as CO, CO2, SO2, and pollutes the environment; with the relevant policies issued by the state, This boiler-type drying equipment is gradually being eliminated. [0003] In grain drying devices, a single heat source is usually used, and only a single hot air temperature is provided to dry grain. However, if the temperature of the hot air is too high, the grain will be overheated and cause bursting or even coking, while the temperature of the hot air is too low. To the standard, has had a strong impact on the quality and output of dry grain. [0004] The temperature of the grain after drying is too high to be directly packaged and stored. Usually...

AI Technical Summary

Problems solved by technology

However, the temperature of grain is generally around 20-30°C. If the hot air of 60-70°C is directly used for drying, it will cause waist bursting and reduce the quality and output of dry grain.

Images