On The Current Power Plant Flue Gas Desulphurization Technology Development And Application Profiles

Abstract: This paper introduces the main flue gas desulphurization technology at

home and abroad in the development of its own characteristics, combined with 100MW Power Plant in China dust conditions and the following unit, analyzes the wet dust - desulfurizing technologies principle and the problems and corresponding solutions, to explore the desulfurization unit 100MW and below the feasibility and necessity of transformation technology for the future transformation of dust removal and desulfurization Jiamusi Power lay a good theoretical basis.

1 Introduction China is coal-based country, according to statistics, in 1995, coal consumption was 1.28 billion tons, and the group increased, reached 23.7 million tons of sulfur dioxide emissions, more than U.S. 21 million tons of emissions, sulfur dioxide emissions world superpower. At present, more than 62% of urban SO2 concentrations exceeding national environmental quality standards, the country's total area is about 40% of the region caused by massive emissions of acid rain and SO2 pollution, it is imperative to control the pollution of SO2.

1996, China's enactment of the new "Air Pollution Control Act," aimed at increasing China's acid rain and SO2 pollution, aggravating circumstances, provisions have been produced and the possible acid rain SO2 polluted areas and other areas designated acid rain control areas and SO2 control area, control of the new region can not be fueled with coal-fire power plants and other large and medium sized enterprises must complete construction of desulfurization and dust removal device, or use the appropriate measures to control SO2; have been completed and can not be fueled with low sulfur coal enterprises should take measures to control SO2 emissions and dust. SEPA requires two control areas, control measures should focus on content as local planning.

2 the current status of flue gas desulfurization technology

Present, domestic and international applications, there are three ways to control SO2: desulfurization before combustion, combustion and post-combustion desulfurization desulfurization (ie, flue gas desulfurization). Which flue gas desulfurization (FGD that FlueGasDesulfuration) is the world's only large-scale commercial application of desulfurization methods to control pollution and acid rain SO2 techniques.

The world in 15 countries and regions have applied the FGD plant, its equipment equivalent to the total installed capacity of 2-2.5 billion Kw, remove SO21000 million tons per year. According to statistics, in 1992, global installed FGD equipment 646 sets, of which the United States accounted for 55.3%, Germany 26.4%, Japan 8.6%, the rest 9.7%. Since these three large-scale application of FGD equipment, and the results are significant, although the three countries in recent years, increasing installed capacity of power plants, but the SO2 emissions are reduced year by year.

Briefly described below currently used widely in the market, flue gas desulphurization methods

2.1 electron beam flue gas desulfurization and denitrification of ammonia industrial technology (referred to as CAEB-EPS technology) the technology to fully tap the electron beam irradiation flue gas desulfurization technology's potential, combined with China's specific national conditions, with investment, low operation cost, operation and maintenance is simple and unique characteristics of high reliability, the highest international level.

2.1.1 Process Principles CAEB-EPS technology is the use of high-energy electron beam (0.8 ~ 1MeV) irradiated gas, the flue gas of sulfur dioxide and nitrogen oxides into ammonium sulfate and ammonium nitrate as a flue gas desulfurization technology. The technology commonly used plant flue gas cooling and humidification, add ammonia, by-product of electron beam irradiation and collection process. Flue gas dust purified flue gas through the cooling tower temperature and humidity regulator (lower temperature, increased water content), and then flows through reactor. In the reactor, the flue gas produced by electron beam irradiation, a variety of active groups, the active group and the oxidation of SO2 in the flue gas NOx, the formation of the corresponding acid. Them with gas in the reactor upstream of the ammonia injected into the reaction of ammonium sulfate and ammonium nitrate particles. Collection device to collect by-product of ammonia and nitric acid produces ammonium sulfate particles, can be used as agricultural fertilizers and industrial raw materials use. .

2.1.2 Technical characteristics: economy flue gas desulfurization method EA-FGD technology with high efficiency while more than 95% removal from flue gas of sulfur dioxide and nitrogen oxides 70%, so that appreciation of desulfurization investment.

device operation is simple, load tracking ability

ammonia by-product is useful material, no secondary pollution.

2.1.3 Applications

CAEBE-PSP technique can be widely used in coal-fired power plants, chemical industry, metallurgy, building materials industry.

On The Current Power Plant Flue Gas Desulphurization Technology Development And Application Profiles

By: polo

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