Thermal power plant circulating water sewage recycling treatment system

Abstract

The invention relates to the technical field of thermal power plant wastewater advanced treatment and recycling, in particular to a thermal power plant circulating water sewage recycling treatment system which comprises an organic matter removal unit, microfiltration equipment, a softening unit and a membrane treatment unit. The organic matter removal unit comprises a circulating water and sewage buffer tank, and the circulating water and sewage buffer tank is sequentially connected with a lifting pump and a micro-flocculator; the softening unit comprises a middle water tank, the water inlet end of the middle water tank is connected with the micro-flocculator, and the water outlet end of the middle water tank sequentially communicates with a first softening tank and a second softening tank; the organic matter removal unit and the softening unit are both connected with the microfiltration equipment; the membrane treatment unit comprises a pH value adjusting tank and a reverse osmosis system, one end of the pH value adjusting tank communicates with the second softening tank, and the other end of the pH value adjusting tank communicates with the input end of the reverse osmosis system; and the output end of the reverse osmosis system is provided with a reverse osmosis water production tank and a reverse osmosis concentrated water tank. The problems that existing equipment is incomplete in pretreatment, serious in membrane pollution and blockage, low in system recovery rate and the like can be solved.

Description

technical field [0001] The invention relates to the technical field of advanced treatment and reuse of waste water in thermal power plants, in particular to a recycling treatment system for circulating water and sewage in thermal power plants. Background technique [0002] As a basic and strategic resource, water resources are of great significance to the sustainable development of society. The country has strict control over industrial water use. As a large industrial water user, thermal power plants have huge water consumption and displacement. At the same time, thermal power plants It is also a large discharge of wastewater. Therefore, the recycling of circulating water and sewage is of great significance to water conservation. In today's water shortage situation, some cities have begun to reduce the tap water supply to thermal power plants or limit their use of groundwater. Therefore, in order to ensure the safety of the unit and water requirements, and reduce environmen...

AI Technical Summary

Problems solved by technology

At present, most circulating cooling power plants have increased the concentration ratio by strengthening raw water pretreatment, optimizing water stabilizers, and upgrading condenser pipes; circulating water and sewage are reused as water for desulfurization, coal transportation, and slag removal, but there are still a large number of The remaining circulating water and sewage need to be discharged outside

In addition, a small number of power plants have adopted reverse osmosis technology to desalinate and reuse circulating water and sewage, but there are problems such as imperfect pretreatment, serious membrane fouling, and low system recovery rate.

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