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Coal-fired Power Plants Denitration Transform Research and Practice

Author: LiuWen
Tutor: MaXiaoZuo；XuTao
School: South China University of Technology
Course: Power Engineering
Keywords: Coal-fired power plants denitration transform De-NOX combustion SCR
CLC: X701
Type: Master's thesis
Year: 2011
Downloads: 62
Quote: 0
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Abstract


With the rapid social and economic development, industrial business emissions impact on the environment is increasing. The contradiction between economic development and environmental protection have become increasingly prominent. In order to meet the requirements of national sustainable development, building a harmonious society, the state environmental requirements and a higher standard, especially for control of air pollutants has increased efforts. That is, to develop the economy, but also protect the environment. The coal-based thermal power plant with air pollution has become an important cause of excess emissions, emission control bear the brunt.As the concentration of sulfur dioxide emissions and emissions limitations, the basic domestic thermal power units have been equipped with desulphurization facilities, greatly reducing sulfur dioxide emissions, has great environmental benefits, but the power plant nitrogen oxide emissions control need to be strengthened. New 300WM or more units are installed denitration device synchronization, Beijing, Guangzhou and other places also carried out thermal power denitrification transformation, but a considerable part of the unit is still no domestic denitrification facilities. With the "Power Plant Air Pollutant Emission Standards" (GB 13223-2011) implementation, a considerable portion of domestic thermal power transformation of the problem is immediate denitrification.In this paper, Guangzhou Wang Long Thermoelectric Co. Ltd. two 2×420t / h +2×100MW units denitrification technical innovation, details the technological transformation Wanglong denitrification plant selection program, denitrification technological transformation and analysis of program implementation , Evaluation of the transformation. Wang Long structure with the status quo of power plant equipment, technical transformation into low-NOx combustion system, nitrogen transformation, transformation of boiler heating surface of the tail, SCR system transformation in three parts. Through the transformation, without affecting the safe operation of boiler under the premise, to the following nitrogen oxides emission concentration 100mg/m3, flue gas denitrification efficiency of 80% of the goal, to meet the imminent implementation of the thermal power plant air pollutant emission standards.The article details the denitrification plant Wanglong content and evaluation of rehabilitation programs and transform the data analysis after the run, after the transformation problems and suggestions. For some this type denitrification unit transformed some of the problems, such as how to access the SCR system, flue gas denitrification blockage after the air preheater made some bold attempt, after running through the transformation of the effect of view, these attempts are successful. Expected by Wang Lung denitrification plant transformation system for the same type of denitrification unit provides technical innovation and experience to run a modified case data, and use it as an opportunity to promote the transformation of the construction of domestic power plants and denitrification.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Exhaust gas processing and utilization
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