Treatment system for waste water from exhaust gas desulfurization in gas-electricity generating device

Abstract

The present invention provides one unique practical system for treating waste water from desulfurizing water gas of steam and electric power co-producing apparatus, separating suspended solid from water and making effluent reach drainage standard. The treating system includes oxidizing tank, boiler water seal tank, bottom ash stirring pond, fast bottom ash depositing pond and waste water tank, and treats the waste water through unique process and control to separate the waste water containing magnesium sulfate and ash sludge into water and sludge. The drained water is suitable for sewage disposal yard to further treat and the ash sludge for reuse.

Description

technical field [0001] The invention relates to a method for treating waste water after waste gas desulfurization treatment of cogeneration equipment of steam and electricity, so that the wastewater generated by the cogeneration equipment of steam and electricity can be separated from water and suspended solid plaster, and the water can be discharged to a general wastewater treatment field for reuse. Discharged from the discharge port, it is convenient to concentrate the stucco for reuse, and the discharged water meets the discharge standard. Background technique [0002] Steam-electricity co-generation equipment converts fuel heat energy into steam and electricity to meet the needs of industrial process production. It uses coal or fuel oil to make boilers generate steam, and exhaust gas will be generated during the combustion process. However, the traditional treatment methods for exhaust gas pollution are nothing more than: (1) collecting dust (charcoal powder or soot) in ...

AI Technical Summary

Problems solved by technology

[0003] (1) Natural drying: a huge drying pool is required, and a huge space is required

[0004] (2) Heating and steaming to dryness: heat source is wasted, and water vapor containing sulfides will be produced in the process of steaming to dryness. Although there is no fly ash (soot), it is a factor that causes acid rain and is also a kind of environmental pollution.

[0005] (3) Filtration of filter material: It is also necessary to set up filter press equipment, which consumes power and filter material (replaced regularly), needs to be cleaned frequently (otherwise it will be blocked), and requires regular maintenance, which is extremely inconvenient

Images