Water-saving recovery method for condensate polishing system of thermal power plant

Abstract

The invention discloses a water-saving recovery method for a condensate polishing system of a thermal power plant, which relates to the technical field of water treatment and adopts a water-saving initial end system, a regeneration system and a water-saving tail end system. The water-saving initial end system comprises a water-saving initial end storage tank and a water-saving initial end power pump, the regeneration system comprises a mixed ion exchange resin separation tower, an anion exchange resin regeneration tower, a cation exchange resin regeneration tower, a high-speed mixed bed and a resin trapper, and the water-saving tail end system comprises a water-saving tail end power pump and a water-saving tail end storage tank; the high-purity demineralized water is recycled in the resin conveying process, the cost can be saved, and the economic benefits of a power plant are increased.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a water-saving and recycling method for a condensate polishing system of a thermal power plant. Background technique [0002] At present, most large thermal power stations are equipped with condensate polishing systems (including pre-filters, high-speed mixed beds, mixed ion exchange resin separation towers, anion exchange resin regeneration towers and cation exchange resin regeneration towers), due to the spherical nature of resins and the flow inclination, determine that the resin needs to flow with water during transportation. When the failed resin is sent back to the mixed ion exchange resin separation tower from the high-speed mixed bed, during the transportation process after the resin scrubbing is completed, a large amount of high-purity demineralized water It is lost as transport water, resulting in a huge waste of water resources. This situation is particularly i...

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Problems solved by technology

[0002] At present, most large-scale thermal power plants are equipped with condensate polishing systems (including pre-filters, high-speed mixed beds, mixed ion exchange resin separation towers, anion exchange resin regeneration towers and cation exchange resin regeneration towers), due to the spherical nature of the resin and the flow inclination determine that the resin must flow together with the water during transportation. When the invalid resin is sent back to the mixed ion exchange resin separation tower from the high-speed mixed bed, a large amount of high-purity desalted water will It is lost as water for transportation, resulting in a huge waste of water resources, which is especially important in water-scarce areas and affects the economic benefits of power plants

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