Wastewater heat recovery heating system

Abstract

The invention provides a waste water heat recovery heating system, which belongs to the technical field of heat recovery, and includes a transfusion pipe, a heat exchange pipe and a biogas pit. The heat exchange tube is set on the outside of the infusion tube, the heat exchange tube and the infusion tube are surrounded by a heat exchange chamber, and the liquid inlet of the heat exchange tube is used to feed low-temperature return water into the heat exchange chamber; The liquid outlet is connected with a burner. The outside of the biogas digester is wrapped with thermal insulation material, which forms a waste water circulation channel with the outer wall of the biogas digester. The top of the biogas digester is provided with a diverter, which communicates with the outlet of the infusion pipe through the delivery pipe; the diverter is used to transfer heat The final waste water is diverted to the waste water circulation channel; the gas outlet of the biogas tank is connected with the burner through a pipe, and is used to transport biogas to the burner; the bottom of the biogas tank is connected with a water pump through a drain pipe. In the waste water heat recovery heating system provided by the present invention, under the condition of relatively low cost, secondary temperature rise is realized, energy input is reduced, and cost is saved.

Description

technical field [0001] The invention belongs to the technical field of heat recovery, and more particularly, relates to a waste water heat recovery heating system. Background technique [0002] In the production process of cast pipe enterprises, a large amount of high-temperature waste water will be produced. If this part of the waste water is directly discharged, it will inevitably lead to waste of resources. Although there are existing heating systems for heat recovery of waste water, due to the low heat exchange efficiency, and the temperature difference between the circulating water in the heating system and the high-temperature waste water is not large, the heat recovery effect is not obvious, and a large amount of energy is still consumed. , in order to meet daily needs. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a waste water heat recovery heating system, which aims to solve the problem that the temperature of the circulati...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a waste water heat recovery heating system, which aims to solve the problem that the temperature difference between the circulating water in the heating system and the high-temperature waste water is not large, so the heat recovery effect is not obvious, and a large amount of energy is still consumed

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