Equipment for treating industrial wastewater by crystallization method

Abstract

The invention provides equipment for treating industrial wastewater by a crystallization method. All the existing industrial wastewater treatment methods have the problems that the one-off investment cost is high, the pollutants cannot be recovered, and the energy consumption is high and the like. The composition of the equipment comprises a filter (20); the filter is connected with crystallizing equipment; the crystallizing equipment comprises a settling region barrel wall (6); the upper surface of the settling region barrel wall is fixedly connected with an outer wall (3); an overflow weir (18) is formed by the settling region barrel wall and the outer wall; the lower surface of the outer wall is provided with a water outlet (5); the upper surface of the outer wall is fixedly connected with a rib plate (4); the rib plate is connected with a reaction region barrel wall (12); a reaction region (14) is formed by an inner cavity of the reaction region barrel wall; the reaction region is communicated with a water and material inlet pipe (1) and a Mg2+ adding pipe (2); a stirring device is arranged in the reaction region; the lower surface of the settling region barrel wall is connected with a mud bucket (7); and the lower surface of the mud bucket is connected with a sludge pipe (9) by a valve (8). The product is used for treating the industrial wastewater.

Description

technical field [0001] The invention relates to industrial wastewater treatment equipment, in particular to equipment for treating industrial wastewater by crystallization. Background technique [0002] Industrial wastewater contains a large amount of high concentration ammonia nitrogen / phosphorus, such as coal gasification wastewater, alloy wastewater, oil refining wastewater, and phosphate industrial wastewater. Especially in the context of energy conservation and emission reduction, the number of industrial water cycles has increased, resulting in a continuous increase in the concentration of pollutants. Existing treatment methods, such as air stripping to remove ammonia and calcium phosphate to remove phosphorus, all have problems such as high one-time investment costs, unrecoverable pollutants, and high energy consumption. The magnesium ammonium phosphate (MAP) crystallization method achieves the simultaneous removal of ammonia nitrogen and phosphorus in water by gener...

AI Technical Summary

Problems solved by technology

Most of the existing MAP crystallization reactions adopt the integrated design of stirring and precipitation, but there are uneven stirring in the stirring zone during operation, and the stirring speed is too high. The precipitation zone is affected by the stirring zone, which leads to the decline of the precipitation effect of MAP crystals, and a small amount of MAP crystals flow out of the crystallization reactor.

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