Technique method for processing desulphurization waste water

Abstract

The invention discloses a technology method for treating desulfurization wastewater, which are applicable to treating the wastewater generated from limestone-plaster wet flue gas desulfurization and other wastewater with high salt content. The method uses the flue gas of heat-engine plants to carry out evaporation and solidification treatment to the desulfurization wastewater or other wastewater with high slat content which is hard to be recovered. The method is characterized by low cost, little area occupation and low energy consumption, which can provide help to the original limestone-plaster wet flue gas desulfurization treatment technology and realize zero discharge of the wastewater of the limestone-plaster wet flue gas desulfurization technology.

Description

technical field [0001] The invention discloses a process method for treating desulfurization wastewater, which is suitable for treating wastewater with high salt content, and is particularly suitable for treating wastewater produced after limestone-gypsum wet flue gas desulfurization. Background technique [0002] There are more than 200 desulfurization technologies studied internationally, which are divided into three forms, namely desulfurization before combustion, desulfurization during combustion, and desulfurization after combustion. Only the third type is the only large-scale commercial application technology in the world. The third form is divided into wet method, dry method and semi-dry method according to the form of desulfurizer; and the most important flue gas desulfurization technology in wet method is the wet limestone / lime method in the United States and the wet limestone / gypsum method in Japan. [0003] China's power plant flue gas desulfurization technology s...

AI Technical Summary

Problems solved by technology

[0005] 1. Exposure and solidification of desulfurization wastewater requires a large site and is limited by climatic conditions;

[0006] 2. The use of heaters to evaporate and solidify desulfurization wastewater has serious corrosion and scaling problems, requires expensive anti-corrosion materials, and is difficult to control;

[0007] 3. Heating, evaporation and curing require a large amount of electricity or other thermal energy;

[0009] 5. The above two processing methods are costly and time-consuming;

[0010] 6. The above two treatment processes cannot bring any help to the original limestone-gypsum wet flue gas desulfurization treatment process

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