Zero discharge and regeneration recovery system of steam-electric sweetener

Abstract

The present invention is desulfurizing and recovering system for steam and power co-producing equipment. The fuel gas produced in burning coal and oil in boiler is desulfurized in wet magnesium hydroxide desulfurizing apparatus, and the waste water is further processed to obtain magnesium hydroxide solution and calcium sulfate for reuse while preventing secondary pollution. The desulfurizing and recovering system consists of magnesium oxide sump, magnesium oxide pyrolyzer, magnesium hydroxide sump, absorbing tower, oxidizer, bottom dust stirring pond, calcium chloride sump, reactor, calcium hydroxide sump, calcium oxide stirrer, calcium oxide sump, magnesium hydroxide buffering tank, two depositors, boiler water seal, etc. connected via specific pipeline. The present invention can produce magnesium hydroxide and calcium sulfate with the waste water while realizing zero drainage.

Description

technical field [0001] The invention relates to a zero-emission and regeneration recovery system for steam-electricity desulfurization equipment, which provides a unique treatment program, so that the exhaust gas generated by the combustion of steam-electricity cogeneration equipment can be desulfurized to produce waste water containing magnesium sulfate, which can be effectively treated as Magnesium hydroxide solution and calcium sulfate, and the operation of the overall system is a cyclic operation, and no waste water discharge (zero discharge) is generated in the process, achieving good industrial utilization value and practical effect. 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. The traditional treatment methods for exha...

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Problems solved by technology

[0004] (1) Natural drying: a huge drying pool is required, and a huge space is required

[0005] (2) Heating and steaming to dryness: heat source is wasted, and the process of steaming to dryness will produce water vapor containing sulfide, although there is no fly ash (soot), it is a factor that causes acid rain and is also a kind of environmental pollution

[0006] (3) Filtration of filter material: filter press equipment needs to be set up, which consumes power, and filter material (regular replacement), needs to be cleaned frequently (otherwise it will be blocked), and regular maintenance is also required, which is extremely inconvenient

Moreover, there will be wastewater discharge

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