Research and application of the most novel and eff

2022-10-22
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Research and application of novel high-efficiency water film turbulent desulfurization and dust removal technology (1)

Introduction: in order to implement the db11/139-2002 integrated emission standard of boiler pollutants in line with international standards in Beijing, a new high-efficiency water film turbulent desulfurization and dust removal technology has been successfully developed. It uses light burned magnesium oxide boiler slag flushing water or calcium oxide boiler slag flushing water, or limestone boiler slag flushing water, or biochemical external drainage as desulfurization liquid, through the wet desulfurization and dust removal equipment combined with water film, swirl and turbulence, with less investment and lower operating cost, it meets the strict "comprehensive emission standard of boiler pollutants" in Beijing within the scope of total amount control, without secondary pollution, scaling, blockage With water and other phenomena. The new desulfurization and dust removal technology was successfully applied to Beijing University of Posts and Telecommunications (20t/h heating boiler) and Beijing Yanjing Beer Co., Ltd. (20t/h industrial steam boiler) in 2002. The SO2 in the discharged flue gas was 30mg/m3 (the standard in the second period was 150 mg/m3), and the soot was 30mg/m3 (the standard in the second period was 50mg/m3). NOx is 180mg/m3 (the standard in the second period is 300mg/m3). The new technology is being popularized and applied in various places

key words: water film turbulent desulfurization and dust removal desulfurization and dust removal water film dust remover

relevant stations: desulfurization and dust removal process technology compilation

1 research background

in order to improve and improve the quality of the atmospheric environment, Beijing began to implement emergency measures to control atmospheric pollution in 1998, and in 2002, it issued db11/139-2002 integrated emission standard of boiler pollutants in line with international standards. According to this standard, In particular, according to the second period standard implemented since November 1, 2003, the existing boilers, even a large number of boilers equipped with hemp water film dust collectors, can not meet the standard of SO2, soot and other pollutants in the discharged flue gas

in view of the current situation that the discharged flue gas of a large number of boilers equipped with hemp water film dust collectors cannot meet the standard, if we take the method of total or partial demolition, and then re install the flue gas desulfurization and dust removal facilities, it will not only cost a lot of investment, but also produce a large amount of solid waste that is difficult to deal with, which is difficult for enterprises, especially enterprises in short of funds. At present, the best way is to meet the new and stricter flue gas emission standards based on the current situation and with less investment and lower operating costs. Accordingly, a new high-efficiency water film swirling turbulent desulfurization and dust removal technology was successfully developed. It was first successfully applied in Beijing University of Posts and Telecommunications (20t/h heating boiler) in 2002, and then successfully applied again in Beijing Yanjing Beer Co., Ltd. (20t/h industrial steam boiler)

2 outlook for flue gas desulfurization technology

in view of the national conditions of China, which are weak in economic strength, increasingly spacious in environmental standards and in line with international standards, we can't choose and recycle more conveniently, choose the current mode of high input control of environmental problems in industrial developed countries, based on domestic and relying on our own technology, research the domestic flue gas desulfurization technology with low investment, low operation cost and good treatment effect, which is the only way to make enterprises affordable, It also has a broad practical prospect in China

the following are some practical technologies that have achieved good results in China in recent years

two patented technologies invented by Cheng Zhijiu, Yin Guangjin and others are both authorized. The first one is "integrated method and equipment for semi dry flue gas desulfurization and production of Magnetized Fertilizer" (Certificate No.: 8601 understanding of material testing. Our testing methods and data knowledge are No. 6 from our experience all year round), and the second one is, "Flue gas treatment method of coking residual ammonia or all coke water wastewater" (Certificate No.: 84133), the two invention patents solve the problem of high cost of flue gas desulfurization at present. They are both semi-dry desulfurization technology, which use the special equipment in the patented technology to integrate flue gas desulfurization and coking and other high concentration refractory organic industrial wastewater treatment. Both of them are waste treatment technologies, which not only have good treatment effect, but also save investment, It has the advantages of low operation cost, zero discharge of wastewater after treatment and no secondary pollution. In 1999, it was first successfully applied in Jiangsu Huaigang group, then in Shanxi Taigang group Lingang company and Shandong Laigang Group. At present, it is being promoted and applied in Sichuan, Henan, Hebei and other places. In the promotion and application stage, the original patented technology has been improved. The improved technology has greater technical and economic advantages and stronger practicability

in addition, the wet waste gas desulfurization technology in the boiling layer of the leaky tray, the wet waste gas desulfurization technology in the swirling layer of the swirling plate, and the wet waste gas desulfurization technology combined with these two technologies have been applied in China at present. They are all integrated technologies of desulfurization and dust removal, which have the characteristics of fast start-up, high efficiency and strong practicality

the new high-efficiency water film turbulent desulfurization and dust removal technology, which can treat the boiler flue gas, especially the boiler flue gas equipped with the hemp water film dust collector, can be the most suitable environmental protection practical technology for the integration of desulfurization and dust removal in China's national conditions. It has the advantages of small changes, fast start-up, and no additional land occupation; Low investment, low operation cost and high desulfurization and dust removal efficiency; The equipment has great advantages of no scaling, no blockage, no water and no secondary pollution

according to the reply of the State Council on the "Tenth Five Year Plan" for the prevention and control of acid rain and sulfur dioxide pollution in the two control areas: ensure that the sulfur dioxide emission in the two control areas in 2005 will be reduced by 20% compared with that in 2000

according to statistics, the total emission of sulfur dioxide in China was 1995.5 million tons in 2000, while the emission of sulfur dioxide in the two control areas was 13.164 million tons, accounting for about 66% of the total. According to the requirements of the tenth five year plan, by 2005, the emission of sulfur dioxide in the two control areas will not only be independent of the detection methods of film friction coefficient, but also be increased by GB 10006, which will be 20% lower than that in 2000, that is, 2.633 million tons will be reduced, The task of preventing and controlling sulfur dioxide pollution in China's two control areas is very arduous

3 new technology of water film turbulent desulfurization and dust removal

for boilers equipped with granite water film dust remover, on the basis of retaining the raw water film dust remover, only the interior of the main tower is transformed, that is, the appearance and structure of the raw water film dust remover remain unchanged, and even the plane layout of the operation site is basically maintained, without the problem of additional land occupation

hydrocyclone, turbulence, water deflector and spray facilities are added in the main tower. Among them, the cyclone, turbulence and spray facilities are made of 316 stainless steel. The following takes the Beijing University of Posts and telecommunications project as an example to introduce the operating parameters and operating effects of this process equipment

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