Heat pump system using waste heat of domestic sewage

Abstract

The invention discloses a heat pump system using waste heat of domestic sewage. The system comprises a hot water collecting tank, an outer wall heat exchange pipe attached on the outer wall of a septic tank, and a sewage side heat exchanger in the septic tank; a branch at one end of a medium water inlet pipe is connected with inlets of the sewage side heat exchanger and the outer wall heat exchange pipe; a branch at one end of a medium water outlet pipe is connected with outlets of the sewage side heat exchanger and the outer wall heat exchange pipe; the other ends of the medium water outlet pipe and the medium water inlet pipe are respectively connected to an evaporator of a sewage source heat pump unit; the hot water collecting tank is connected with a domestic hot water device through a domestic hot water use pipe; the hot water collecting tank is connected with the sewage source heat pump unit through a domestic water inlet pipe and a domestic water outlet pipe; and domestic water is fed in the sewage source heat pump unit from the domestic water inlet pipe for heat exchange by a condenser of the sewage source heat pump unit, and is fed in the hot water collecting tank from the domestic water outlet pipe. The system solves such problems as blockage, corrosion and decontamination in a traditional sewage source heat pump.

Description

technical field [0001] The invention relates to the field of sewage source heat exchangers and heat pumps, in particular to a heat pump system utilizing waste heat from domestic sewage. Background technique [0002] Domestic sewage is a renewable thermal energy resource that contains abundant low-level thermal energy. It has been applied to a certain extent in China, Japan, and especially in some Nordic countries. The use of sewage source heat pump system can solve the building heating in winter, air conditioning in summer and hot water supply throughout the year. [0003] The energy efficiency ratio of the sewage source heat pump unit can reach 4.3. Compared with the ground source heat pump, the total operating cost of the sewage source heat pump system is about 90% of the ground source heat pump system, which is about 50% of the gas hot water system; Compared with water and air source heat pumps, sewage source heat pumps can provide hot water all year round; compared with...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a heat pump system that utilizes the waste heat of domestic sewage, and utilizes the waste in the outer wall of the septic tank, the surrounding soil and the internal sewage to achieve the purpose of providing domestic hot water throughout the year and solve the problem of traditional sewage source heat pump blockage , corrosion, decontamination and other problems, solve the problems of traditional ground source heat pump horizontal buried pipes occupy a large area, and vertical buried pipes are expensive

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