Fine treatment regeneration system and wastewater classified collection method

Abstract

The invention relates to a fine treatment regeneration system and a wastewater classified collection method. The fine treatment regeneration system comprises a resin tank, a wastewater pool, a reuse water pool, an acid regeneration tank, an alkali regeneration tank and valves A, B, C, D, E, F, G and H; the two ends of the resin tank are respectively connected with one end of the valve A and one end of the valve B; the acid regeneration tank is connected with one end of the valve G; the alkali regeneration tank is connected with one end of the valve H; the two ends of the wastewater pool are respectively connected with one end of the valve C and one end of the valve D. The beneficial effects are that: by accurately measuring the change trend of salt content and ammonia nitrogen in fine treatment regeneration process, the part of wastewater with the highest salt content and ammonia nitrogen in the acid / alkali feeding and acid replacement / alkali replacement process is separated out, and the rest part of low-salt wastewater is recycled, so that low-salt wastewater is recycled to the maximum extent. The high-salinity wastewater is separated from the front end, the ion concentration of the wastewater is greatly improved, the high-salinity wastewater amount is reduced by about 40%, and the method has the characteristics of energy conservation and environmental protection.

Description

technical field [0001] The present invention relates to the field of water treatment in thermal power plants, and especially includes a fine treatment regeneration system and a waste water classification and collection method; the precise control of the regeneration process can maximize the reuse of low-salt waste water, and at the same time make the separated high-salt high- The amount of ammonia wastewater is minimized to reduce the burden of subsequent wastewater treatment. Background technique [0002] At present, most of the 300MW or more coal-fired units in service in my country are equipped with condensate polishing systems. At present, the medium-pressure condensate mixed bed system is commonly used, specifically the series connection of the pre-filter and the high-speed mixed bed. The regeneration system mainly includes the separation tower, the negative tower and the positive tower. In addition, it also includes acid and alkali equipment, hot water tank, flushing ...

AI Technical Summary

Problems solved by technology

[0004] But the deficiency of current classified collection method is: this kind of classified collection method can make 70% low-salt waste water reuse in regeneration process, but still 30% waste water needs to be treated, and water volume is bigger, and also use desalination process in replacement process. Brine flushing and replacement process still mixed a lot of low-salt wastewater, which not only prevented a large amount of low-salt wastewater from being reused, but also increased the amount of wastewater to be treated in the later stage and increased the cost of post-treatment

Images