Triple pressure air-cooled heat pump drying system with heat recovery function

Abstract

The invention discloses a triple pressure air-cooled heat pump drying system with a heat recovery function. According to the technical problems to be solved, in an existing drying process, environment pollution is serious, dehumidification energy consumption is low, operating cost is high, a heat pump cannot work normally under extreme conditions, and moisture exhaust waste heat cannot be utilized. The triple pressure air-cooled heat pump drying system comprises a triple pressure air-cooled heat pump subsystem and a drying medium circulating subsystem. The triple pressure air-cooled heat pump subsystem comprises a main-path compressor, a main-path oil separator, a main-path condenser, a subcooler, an intermediate-pressure gas-liquid separator, an evaporator, a low-pressure gas-liquid separator, an auxiliary-path compressor and an auxiliary-path oil separator. An exhaust opening of the main-path compressor is connected with an inlet of the main-path condenser and an outlet of the auxiliary-path oil separator through the main-path oil separator. An exhaust opening of the auxiliary-path compressor is connected with an inlet of the auxiliary-path oil separator. After the above technical scheme is adopted, by means of the triple pressure air-cooled heat pump drying system, the reliability, stability and economic performance of whole year operation of the air-cooled heat pump drying system are improved, and the application field is widened.

Description

technical field [0001] The invention relates to the technical field of heat pump drying, in particular to a three-pressure air-cooled heat pump drying system with heat recovery. Background technique [0002] Facing the increasingly prominent problems of energy shortage and environmental pollution, traditional drying technologies such as oil, gas, coal or wood have been gradually eliminated. At present, there are two main environmental protection drying technologies commonly used. One is the use of electric heating tubes. Direct heating technology is easy to operate, but the efficiency is too low and the operating cost is high, which is contrary to the national energy-saving policy; the other is to use heat pump drying technology, especially air source heat pump technology, which has simple structure, convenient installation and use, energy saving and environmental protection , some enterprises have begun to use it. However, the current conventional air source heat pump dryi...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing drying process has serious environmental pollution, relatively low dehumidification energy consumption, high operating costs, heat pumps cannot work normally under extreme working conditions, and waste heat from dehumidification cannot be utilized. Pressure air-cooled heat pump drying system

Images