Wastewater zero discharge system based on efficient concentrating and spray drying integrated treatment

A zero-discharge, waste water technology, which is applied in the direction of special treatment targets, water/sewage treatment, heating water/sewage treatment, etc., can solve the problems of high operating costs, lengthy and complicated process, and large steam consumption, so as to reduce water consumption , Realize the effect of low temperature evaporation and stable atomization particle size
CN113264564APending Publication Date: 2021-08-17国能朗新明环保科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
国能朗新明环保科技有限公司
Publication Date
2021-08-17

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Abstract

The invention provides a wastewater zero discharge system based on efficient concentrating and spray drying integrated treatment, which is characterized in that desulfurization wastewater is collected into a wastewater collection tank, the wastewater collection tank and a wastewater lifting pump are in liquid level linkage, the wastewater lifting pump conveys desulfurization wastewater stock solution to a preheater, the preheater preheats the desulfurization wastewater, the preheated desulfurization wastewater flows to an inlet of a forced circulation pump, feed liquid is driven by the pressure of a forced circulation pump to enter a heater, the desulfurization wastewater is heated, evaporated and concentrated in the heater, and when the density of a densimeter arranged in a vapor-liquid separator reaches a set value, part of concentrated liquid is discharged into a concentrated liquid collecting box; and the desulfurization wastewater is evaporated and concentrated, then the concentrated solution is evaporated and dried by an evaporation drying tower, salt particles generated by drying enter a dust remover, and the system has the characteristics of short process flow, high concentrating ratio, no scaling in long-time stable operation, avoidance of auxiliary dosing, capability of recovering fresh water, diversification of heat sources and the like.
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Description

technical field

[0001] The invention belongs to the technical field of industrial wastewater treatment, and in particular relates to a wastewater zero discharge system based on the integrated treatment of high-efficiency concentration and spray drying. Background technique

[0002] At present, thermal power plants adopt "limestone-gypsum wet flue gas desulfurization technology", which has become the most widely used desulfurization technology in thermal power plants at home and abroad, but desulfurization wastewater will inevitably be discharged during this process. The water quality of desulfurization wastewater is generally acidic (pH 4~6), containing a large amount of suspended solids, ammonia nitrogen and heavy metal pollutants, as well as Ca2+, Mg2+, F-, SO42-, Cl-, etc. The high concentration of sulfate in desulfurization wastewater is directly discharged When it enters the environmental water body, it will diffuse to the sediment layer, resulting in the formation of m...

Claims

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