Coal-burning boiler limestone dual-purpose desulfurizing method

Abstract

The invention discloses a fuel furnace limestone double-effective desulfurizing method in the environmental protective desulfurizing technological domain, which is characterized by the following: combining drying desulfurizing and wetting desulfurizing method into double-effective desulfurizing method, saving cost, discharging less sulfur dioxide than single operating course.

Description

technical field [0001] The invention belongs to the technical scope of environmental protection desulfurization, and in particular relates to a limestone double-effect desulfurization method for a coal-fired boiler. Background technique [0002] At present, the use of coal-fired boilers is quite common, for heating, smelting and other industrial purposes, but due to the high sulfur content of coal, there is a lot of sulfur dioxide gas in the exhausted flue gas, which causes environmental pollution and is the main cause of acid rain. people's ecological environment. The existing desulfurization method is to add lime powder or other alkaline substances to coal-fired boilers for more than 90%. [0003] Specific method 1: Desulfurization in a dry boiler (such as a circulating fluidized bed), directly blowing limestone powder into the boiler furnace and mixing it directly, and burning it together with coal to reduce the emission of sulfur dioxide and achieve the purpose of desul...

AI Technical Summary

Problems solved by technology

[0005] Although the desulfurization of coal-fired boilers has been researched for more than 100 years in the world, and there are many successful cases in the United States and Japan, it costs 290 million yuan to import a German desulfurization device, and the environmental protection renovation fee is 20,000 to 30,000 yuan based on the heating capacity. / ton, heating companies cannot bear such a high operating cost: the power consumption of 3,000 tons / hour of spraying circulating water is very large, and it is difficult for electricity companies to bear

It is unrealistic to directly introduce it due to different national conditions, especially the boilers in Beijing that are responsible for heating, mainly in the size of 10 to 40 tons, with various brands, different specifications, and immature processes, so it is impossible to directly refer to the mature desulfurization technology of power plants

Therefore, so far, there is no reference to an economical and efficient demonstration project on the issue of coal-fired desulfurization in this city.

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