Sewage energy and biogas energy combined heat pump heating system

Abstract

The invention aims at providing a sewage energy and biogas energy combined heat pump heating system. Biogas enters a biogas engine through a preheater to be burned, passes a water / waste gas heat exchanger and is discharged after passing the preheater; sewage enters a sewage evaporator through a sewage pump and is discharged after heat exchanging; a bent shaft of a compressor is connected with a power shaft of the biogas engine, refrigerant is added in the sewage evaporator, and the refrigerant after absorbing heat of the sewage and being evaporated is inhaled by the compressor after passing a gas-liquid separator and returns the sewage evaporator after passing a condenser; and a heating circulation pump is communicated with a circulating water replenishing pump, a first electromagnetic valve is mounted between the heating circulation pump and the circulating water replenishing pump, and water enters the condenser and the water / waste gas heat exchanger sequentially through the heating circulation pump for heat exchanging and is stored in a heat storage water tank which is communicated with a user. By the sewage energy and biogas energy combined heat pump heating system, electric energy is saved, environmental pollution is small, residual heat of waste gas of the biogas engine and domestic sewage source with a lot of heat energy are recycled simultaneously, so that improvement of energy quality is realized.

Description

technical field [0001] The invention relates to a heating system. Background technique [0002] At present, the production and heating of domestic hot water are obtained by means of fuel oil and coal combustion, which cause great environmental pollution and high cost; at the same time, a large amount of heat energy contained in sewage is wasted along with the discharge, which also pollutes the environment; Effective recovery and utilization of low-temperature heat energy from sewage can realize energy reuse. As a high-quality renewable biomass energy, biogas has the characteristics of extensive resources, low price, waste utilization, clean discharge, high calorific value and good anti-knock performance. Biogas can drive a biogas engine to do work, which is a clean and efficient energy utilization method, which can not only turn waste into treasure, but also reduce greenhouse gas emissions and be more environmentally friendly. In addition, the exhaust gas temperature of th...

AI Technical Summary

Problems solved by technology

[0003] During the normal operation of the traditional heat pump, it must consume high-grade energy such as electric energy to drive the compressor, and the energy saving effect is not significant

However, when the water source heat pump is used for heating in winter, due to the low water temperature, the heating capacity is insufficient to meet the user's requirements, which limits the popularization of the heat pump.

At the same time, the exhaust gas temperature of the biogas engine can reach about 600°C. If this part of the waste heat of the exhaust gas is not recycled, it will not only aggravate the environmental pollution, but also waste energy.

Images