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Two-stage heating system for recycling waste heat of industrial wastewater based on negative pressure flash principle

A technology of industrial wastewater and two-stage heating, which is applied in heating systems, hot water central heating systems, heating methods, etc., can solve the problems of industrial wastewater waste energy waste, etc., to improve energy utilization, reduce heating costs, and improve supply efficiency. The effect of thermal mass

Pending Publication Date: 2021-08-10
HUANENG YICHUN THERMAL POWER CO LTD +2
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Problems solved by technology

[0004] The purpose of the present invention is to provide a two-stage heating system based on the principle of negative pressure flash evaporation to recover the waste heat of industrial waste water, which solves the problem of large waste of waste energy of industrial waste water in existing thermal power plants

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  • Two-stage heating system for recycling waste heat of industrial wastewater based on negative pressure flash principle

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] The present invention aims at the problems of insufficient peak-shaving capability during the heating period of thermal power plants and large waste of industrial waste water in the plant, and combines electric compression heat pumps, flash tanks, and shell-and-tube heat exchangers for heating in a heating network cycle Water can improve the flexibility of peak regulation during the heating period of the power plant while recovering the low-temperature waste heat of industrial wastewater, improve the energy utilization rate of the entire system, reduce heating costs, improve the quality of heating supply, and achieve the purpose of energy saving and emission reduction.

[0026] Such as figure 1 As shown, the present invention provides a two-stage heating system based on the principle of negative pressure flash to recover waste heat from industrial wast...

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Abstract

The invention provides a two-stage heating system for recycling waste heat of industrial wastewater based on a negative pressure flash principle. The two-stage heating system comprises a waste heat low-temperature heating loop for primary heating of return water of heat supply network circulating water, a waste heat high-temperature heating loop for secondary heating of the return water of the heat supply network circulating water, and an industrial wastewater flash loop for separately providing heat sources for the waste heat low-temperature heating loop and the waste heat high-temperature heating loop. According to the two-stage heating system, while the low-temperature waste heat of the industrial wastewater is recycled, the peak regulation flexibility of a power plant in the heating period is improved, the energy utilization rate of the whole system is improved, the heating cost is reduced, the heating quality is improved, and the purposes of energy conservation and emission reduction are achieved.

Description

technical field [0001] The invention belongs to the technical field of heat supply, and in particular relates to a two-stage heating system for recovering waste heat from industrial waste water based on the principle of negative pressure flash evaporation. Background technique [0002] In the cold northern regions of my country, thermal power plants are basically used as the main heat source for heat supply. The lack of flexibility in power system adjustment and the relatively rigid dispatching and operation mode of the power grid have made it difficult for the system to fully adapt to the requirements. It is difficult for large-scale units to take advantage of energy saving and high efficiency. The contradiction is prominent. At the same time, the system in the factory will generate a large amount of industrial wastewater during operation, and some industrial wastewater containing more low-grade heat energy will be discharged directly. A large amount of medium and low temper...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24D3/18
CPCF24D3/18F24D2200/123
Inventor 刘洪宇耿如意王文钢赵峰张玉良刘国臣乔磊尚海军方志东鲁光明梁世鑫魏灿赢
Owner HUANENG YICHUN THERMAL POWER CO LTD
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