System for removing SO3 in desulfurization wastewater and flue gas based on high and low temperature flue cascade evaporation

A desulfurization wastewater, high and low temperature technology, applied in the direction of water/sewage treatment, water/sludge/sewage treatment, gaseous effluent wastewater treatment, etc., can solve the problem of limiting the consumption of desulfurization wastewater, reducing the service life of equipment, and changing the volume of wastewater. To reduce the risk of sticking or even "blocking" the air preheater and improve the consumption capacity
CN112696701AActive Publication Date: 2021-04-23武汉天空蓝环保科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
武汉天空蓝环保科技有限公司
Publication Date
2021-04-23

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Abstract

The invention provides a system for removing SO3 in desulfurization wastewater and flue gas based on high and low temperature flue cascade evaporation. The system comprises a flue, a denitration device, an air pre-heater, a dust remover and a desulfurization tower are arranged on the flue, an agglomeration composite solution preparation device is further included, desulfurization wastewater generated by the desulfurization tower is treated and then guided into the agglomeration composite solution preparation device, and a liquid outlet of the agglomeration composite solution preparation device is connected with a plurality of spray guns; and a nozzle of at least one spray gun extends into the first flue section, a nozzle of at least one spray gun extends into the second flue section, and a nozzle of at least one spray gun extends into the third flue section. A prepared agglomeration composite solution is sprayed into the first flue section, the second flue section and the third flue section, on one hand, desulfurization wastewater evaporation can be accelerated, the problem of difficult low-temperature evaporation is avoided, on the other hand, temperature gradient removal of SO3 is formed, and the probability of forming ABS through ammonia escape generated by denitration is eliminated from the source.
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Description

technical field

[0001] The invention relates to energy saving and environmental protection, in particular to a method based on high and low temperature flue cascade evaporation desulfurization wastewater and SO in flue gas 3 Remove the system. Background technique

[0002] Desulfurization wastewater has high soluble salt content, Cl - It is highly corrosive and cannot be directly discharged outside. The "zero discharge" treatment of desulfurization wastewater is the direction of desulfurization wastewater treatment. Previously, concentration reduction + evaporative desalination treatment of desulfurization wastewater was mostly used, the investment and operation costs were high, and the "miscellaneous salt" produced was due to Cl - , heavy metals, etc. are high in content and become "hazardous waste", which is still to be processed and difficult to be accepted by users. Most of the flue evaporation systems are now used for evaporation treatment: that is, the temperature o...

Claims

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