High-recovery circulating water blowdown water desalination treatment and recycling system for thermal power plant

Abstract

The invention discloses a high-recovery circulating water blowdown water desalination treatment and recycling system for a thermal power plant. Specifically, an outlet of a circulating water blowdownwater pool is communicated with an inlet of an intermediate pool through a softening-coagulating clarification treatment system, wherein an outlet of the intermediate pool is communicated with the inlet of a filtering system; a clear water outlet of the filtering system is communicated with the inlet of a clear water tank; the outlet of the clear water tank is communicated with the inlet of an ultrafiltration treatment system; the outlet of the ultrafiltration treatment system is communicated with the inlet of an ultrafiltration water producing tank; the outlet of the ultrafiltration water producing tank is communicated with a roll type reverse osmosis treatment system; the clear water outlet of the roll type reverse osmosis treatment system is communicated with the inlet of a fresh watertank; a concentrated water outlet of the roll type reverse osmosis treatment system is communicated with the inlet of a disk-tube type reverse osmosis treatment system; and the clear water outlet of the disk-tube type reverse osmosis treatment system is communicated with the inlet of the roll type reverse osmosis treatment system. The system can realize zero discharge treatment of circulating water blowdown water from the thermal power plant.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and relates to a recycling system for desalination treatment and reuse of circulating water and sewage of thermal power plants. Background technique [0002] With the increasingly stringent restrictions on the displacement and water quality of thermal power plants, water conservation and emission reduction in thermal power plants has become an inevitable trend. The circulating water system is the largest drainage system for wet-cooled thermal power plants. In recent years, with the upgrading and optimization of water treatment technology, circulating water stabilizer performance and condenser pipe materials, most power plants adopt the operation control mode of high concentration ratio of circulating water, but the sewage volume of circulating water still accounts for the external discharge of power plants. 80% and above. Therefore, the treatment and reuse of circulating water and...

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Problems solved by technology

[0003] At present, some thermal power plants adopt the process of "coagulation clarification + filtration + reverse osmosis desalination" for the treatment of circulating water and sewage. Due to the imperfect pretreatment design and the low recovery rate of reverse osmosis, the volume of concentrated reverse osmosis water is relatively large, and the concentration of reverse osmosis The salt content, organic matter, total phosphorus, etc. in the water are high, and the direct discharge does not meet the environmental protection requirements, and the zero discharge treatment of the circulating water and sewage of thermal power plants cannot be realized

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