Desulfurization and combustion method using calcium carbide slurry and coal slurry in thermal power plant
A combustion method and calcium carbide mud technology, which are applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of high cost of desulfurization technology and difficult by-product treatment, so as to overcome the difficulty of by-product treatment and achieve good sulfur fixation effect. , easy to use effect
Inactive Publication Date: 2012-09-12
新汶矿业集团有限责任公司华丰煤矿
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[0004] In order to overcome the technical problems of high cost and difficult disposal of by-products in existing thermal power plant boiler flue gas desulfurization technology, the present invention provides a method for desulfurizing thermal power plant boiler flue gas by using calcium carbide slime and coal slime
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[0012] The desulfurization combustion method of the present invention will be further described below according to the accompanying drawings.
[0013] Such as figure 1 As shown, calcium carbide mud and coal slime enter the bin 2 through the scraper conveyor 1 according to the required ratio, and carry out preliminary mixing and mixing in the bin 2. After mixing, they are sent to the mixing bin 4 by the pre-pressing screw feeding device 3. The material in the mixing chamber 4 is stirred again, and then sent to the circulating fluidized bed boiler 6 by the concentrated material pump 5 for mixed deflagration to achieve the effect of desulfurization.
[0014] The pre-pressing screw feeding device of the present invention is existing commercially available equipment.
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The invention discloses a desulfurization and combustion method and a desulfurization and combustion system using calcium carbide slurry and coal slurry in a thermal power plant. Calcium carbide slurry waste in a salinization production enterprise is used as a desulfurization reactant, the coal slurry is used as a fuel carrier, a boiler in the thermal power plant is changed into a circulating fluidized bed boiler, a coal slurry pump is used as power source for conveying mixed desulfurization slurry of the coal slurry and the calcium carbide slurry to the top of the circulating fluidized bed boiler, the mixed desulfurization slurry is deflagrated on the upper middle part of a hearth, and first furnace combustion desulfurization reaction is performed; and at a tail flue, a desulfurizing agent which is not completely reacted carries out secondary reaction for thorough desulfurization. By the method, one waste is treated by the other waste, so that pollution-free production is really realized. The method is particularly suitable for medium and small coal mine pithead resource comprehensive utilization power stations, and the desulfurization efficiency can reach over 90 percent.
Description
technical field [0001] The invention relates to a flue gas desulfurization process of a thermal power plant boiler, in particular to a technology for desulfurizing the flue gas of a thermal power plant boiler by using calcium carbide slime and coal slime, so as to achieve waste treatment with waste and truly realize clean production. Background technique [0002] Sulfur dioxide (SO 2 ) is one of the main air pollutants, coal-fired power plants are SO 2 big emitters. By the end of 2010, the national thermal power installed capacity was 707 million kilowatts, accounting for 73% of the total installed capacity, and the coal consumption was 1.6 billion tons. The emissions of sulfur dioxide and nitrogen oxides from thermal power account for more than 40% of the national emissions. As the country pays more and more attention to environmental protection, the research and application of boiler flue gas desulfurization technology in coal-fired power plants has also made great prog...
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IPC IPC(8): B01D53/83B01D53/50
Inventor 周文涛闫武李玉强孙德鹏郑宝军
Owner 新汶矿业集团有限责任公司华丰煤矿
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