Medium-low-temperature hot source heat pump steam system

Abstract

A medium-low-temperature hot source heat pump steam system comprises a heat pump circulating loop allowing a refrigerant to pass and a flash evaporation circulating loop allowing flash evaporation water to pass, wherein an evaporator, a high-temperature compressor, an oil separator, a condenser, an economizer, a subcooler and an electronic expansion valve are sequentially arranged on the heat pump circulating loop, a medium-low-temperature hot source pipeline is communicated to the evaporator, an oil return pipe of the oil separator is communicated to an oil bath of the high-temperature compressor, a flash evaporator and a pressurizing water pump are arranged on the flash evaporation circulating loop, the flash evaporation circulating loop passes the condenser, the condenser is positioned between an outlet of the pressurizing water pump and an inlet of the flash evaporator, a first bypass pipeline is bypassed on a refrigerant outlet pipeline of the evaporator, and the first bypass pipeline passes the subcooler and serves as the cold source of the subcooler. The system can utilize low-grade residual heat to produce steam higher than 100 DEG C, is simple in structure, and can fully recycle waste heat and fully utilize resources.

Description

technical field [0001] The invention mainly relates to the technical field of high-temperature heat pumps, in particular to a medium-low temperature heat source heat pump steam system which utilizes medium-low temperature heat sources to generate steam. Background technique [0002] With the increasingly prominent international energy problems, how to efficiently use energy, recover various waste heat and reduce the environmental pollution of heat discharge has become the focus of attention. A heat pump is a device that transfers heat energy from a low-level heat source to a high-level heat source. Usually, low-grade heat energy is first obtained from natural air, water or soil, and then electricity is used to do work, and then high-grade heat energy that can be used is provided to people. However, if only ordinary heat pumps are used to generate steam higher than 100°C, there are also high-temperature steam heat pump systems that use low-grade waste heat (ie, medium and low...

AI Technical Summary

Problems solved by technology

However, if only ordinary heat pumps are used to generate steam higher than 100°C, there are also high-temperature steam heat pump systems that use low-grade waste heat (ie, medium and low temperature heat sources) to generate steam higher than 100°C. If the system needs to generate steam above 100°C, high energy-consuming devices such as steam compressors or boilers need to be added, which makes the structure of the device complex and has the disadvantage of low energy saving effect

Images