鈥婣nalysis on Problems and Solutions of FGD in Coal Fired Power Plants
Analysis on Problems and Solutions of FGD in Coal Fired Power Plants
With the sustainable development of the strategy gradually by the promotion of many industries, FGD system in coal fired power plants come gradually into the strategy of sustainable development. Coal fired power plant thermal protection measures are mainly for FGD system to start, so the coal fired power plant FGD system is the key to the sustainable development of coal fired power plants. This article is talking about the coal fired power plant FGD system to analyze the current existing problems and propose a solution for the future.
With the rapid development of World's economy, the power industry has become one of the basic industries in the World, in the process of global development has a pivotal position. On the current status, most of World's small and medium-sized power plants are coal fired power plants, and the main consumption of electricity is coal.
Coal combustion generate energy, but at the same time, SO2, NOX, CO, soot and other waste caused environmental pollution. If these wastes are not treated and discharged to the atmosphere, they will form sulfuric acid and nitric acid rain, resulting in some corrosion of agriculture, forestry and buildings. Carbon dioxide will gradually increase the greenhouse effect; The reaction of waste, will drift in the air, the formation of haze, endangering human鈥檚 health.
The concept of sustainable development is a concept that has been gradually improved from the concept of the eighties. Usually in the sense of the modern people to consume the consumption of the disposable energy, environment, scarce resources and other needs of the restraint and limited use, to leave the use of space for our future generations. Sustainable development is a very large system that includes economic, environmental, and natural resource systems.
Environmental protection is one of the very important systems that can be developed continuously. The environmental protection of coal fired power plants mainly refers to the degree of improvement of its FGD system. In other words, FGD system are the core of environmental protection of coal fired power plants. Therefore, it is very important to analyze the importance of FGD system in coal fired power plants and analyze the importance of sustainable development.
First, the following is the existing problems in the FGD system in coal fired power plant
Coal fired power plant FGD system is a very important work of a coal fired power plant, but due to the high cost of FGD system, so many coal fired power plant FGD systems are not fully in accordance with the requirements of environmental protection.
(A) of the ultra-low emissions of coal on the controversy on the coal fired power plant pollutants ultra-low emissions are scientific, many years ago by the intense discussion. From the data show that in order to achieve ultra-low emissions, the effect of the transformation fee is very amazing. The cost of desulfurization of 130 yuan per kilowatt or so, the cost of dust removal costs to reach 70 yuan or so no kilowatts, denitrification of the transformation cost of 130 yuan per kilowatt or so. The current situation, can not deny the development of ultra-low emissions have a very important significance.
But on the realization of ultra-low emissions, technical issues is not the key, the key is to put into the cost-effective. From the perspective of comprehensive benefits, from the resource and energy consumption, near zero emissions increased by more environmental protection equipment.
(B) the upcoming reform of the power system At present, World's electricity market is oversupply, in the market economy, increasing competition in the case of pressure, the electricity price is bound to be a greater degree of decline, the transaction price is Decided by many factors.
In the upcoming power system reform if implemented, if not part of the environmental protection subsidies, environmental protection devices will be involved in the power plant bidding process, therefore, ultra-low emissions will be suspended. Because the standard of environmental protection emissions, the completion of the construction of ultra-low-emission devices will be reduced with operating costs, fire all aspects of operating costs will be reduced.
(C) of the coal fired power plant desulfurization and deodorization gypsum rain problem is the long history of thermal power generation is widespread. Now most of our 300MW units are used limestone gypsum wet flue gas desulfurization technology, this technology is the need for GGH device, in the abolition of the device, the plaster problem is increasingly serious and widespread.
According to the experimental observations of the site, in the range of 850 meters down the wind can be clearly felt the deposition of gypsum rain. When the ambient temperature of the unit is reduced and the operating load is increased, this phenomenon is more serious and will contain sulfur dioxide sulfur dioxide and gypsum slurry in the sediment, and this phenomenon will pollute the environment near the coal fired power plant and even affect To the people around the physical and mental health.
The second environmental pollution caused by the attention of the power industry, gypsum rain on the impact of the desulfurization system has also attracted attention. After discussing the many effects, the results show that the most important thing is that gypsum rain will have an impact on the operation of the instrument. Will make the operation of the demister to stop, increase the probability of corrosion of the flue system, and even lead to the collapse of the defogger. In the desulfurization system, the defogger is a very critical instrument that directly affects the reliable operation of the desulfurization system.
Second, the solution and recommendations
In all coal-fired industries, the standard for flue gas emissions varies widely, and for different impacts on air pollution, it is necessary to improve the reference for coal-fired emissions from various industries. In the coal fired power plant FGD system industry, on the one hand, on how to promote the ultra-low emissions of science is the primary problem, the promotion efforts need to control, but also need to further strengthen the FGD system technology to solve the problem. Improve the existing technology vulnerabilities, and the perspective of sustainable development in the perspective of sustainable development as the basic starting point of coal fired power plant FGD system technology. On the other hand, to solve the operational problems of third parties. Finally, to further strengthen the regulation of the catalyst regeneration industry to prevent the second pollution. In FGD system, usually use lime slurry to absorb the waste gas, such as No, NO2, SO2, etc. But due to the high corrosive and abrasive lime slurry , pipes, elbows and valves may be damaged easily. Now,anti corrosion and anti abrasion ceramics lined elbows, ceramics lined pipes, and ceramic ball valves have been widely used, corrosion and abrasion have been solved obviously.
Third, the conclusion
This paper reviews the development trend of FGD system technology in coal fired power plants and puts forward some problems and solutions in the FGD system of coal fired power plants.
Thus, in the broad sense, coal fired power plant FGD system technology is a comprehensive field involving a wide range of areas, in the idea of sustainable development, in order to reduce emissions of sulfur oxides and nitrogen oxides on the atmosphere of pollution, On the one hand it is necessary to improve the combustion technology, on the other hand should also strengthen the smoke in the presence of pollutants in the flue gas purification treatment.
At present, at home and abroad have developed a variety of desulfurization, denitrification process, the evaluation of various processes should also be sulfur oxides and nitrogen oxides purification rate, installation costs and operating costs and by-product processing, the second pollution and other aspects of comprehensive evaluation. In this regard, foreign countries have accumulated advanced experience. Analysis of the status quo in World, still need to improve the technical loopholes, and to prevent secondary pollution.
In our country at this stage to vigorously promote the policy of sustainable development, in the industrial production needs more attention. FGD system are the core contents of environmental protection in coal fired power plants. Therefore, it is very important to analyze the importance of FGD system in coal fired power plants and analyze the importance of sustainable development.