Coal-burning boiler limestone dual-purpose desulfurizing method
A technology for coal-fired boilers and limestone, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of unaffordable electricity costs, immature processes, and different specifications, so as to reduce operating costs and reduce operation and maintenance. effect of fee
Inactive Publication Date: 2009-07-22
武建国
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[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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[0026] The invention provides a limestone double-effect desulfurization method for a coal-fired boiler. exist figure 1 In the schematic diagram of the limestone double-effect desulfurization device for a coal-fired boiler shown, the device combines dry desulfurization and wet desulfurization into a double-effect desulfurization method, which reduces the cost of desulfurization, and the emission of sulfur dioxide is much lower than that of the two methods. Emissions used alone.
[0027] The specific process of described double-effect desulfurization described in conjunction with accompanying drawing is as follows:
[0028] 1) The calcium content is 30 ~ 60Wt%, the particle size is 0.25 ~ 50Cm 3 The limestone 3 and the sulfur content of the coal 2 are put into the coal-fired boiler 1 for co-combustion according to the weight ratio of 1:1, 1:2, 1:3, 1:4, 1:5, so that the coal combustion produces Part of SO 2 Formation of CaSO on limestone surface 4 , a part of the sulfur is ...
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The invention discloses a limestone double-effect desulfurization method for a coal-fired boiler belonging to the technical scope of environmental protection desulfurization. The method combines dry desulfurization and wet desulfurization organically into a double-effect desulfurization method through a device. The cost of desulfurization is low, and the emission of sulfur dioxide is far lower than that of the two methods alone.
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...
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IPC IPC(8): B01D53/50
Inventor 武建国
Owner 武建国