| Coal is an important part of China's energy system.The role of energy in China's energy system is very important.However,in the process of combustion,the pollution of particulate matter and SO2 produced by soot is an important source of pollution affecting air quality.This triggered by the environmental problems at all levels of our government and the broad masses of the people's attention.Since the 21st century,with the rapid development of China's industrial modernization,the rapid growth of GDP,SO2 emissions year after year ranked first in the world,the risk of haze increased,we are suffering from its constant damage.Industrial coal-fired boiler combustion flue gas in the SO2,particulate matter is leading to deterioration of air quality,PM2.5 exceeded the main source,therefore,in the actual operation process,to ensure that coal-fired boiler flue gas particles,SO2 discharge standards,Is to improve the current air quality,prevention of acid rain,haze and other atmospheric pollution of the fundamental initiatives.China's large number of coal-fired boilers and widely distributed,due to historical development reasons,a large number of small and medium-sized boilers exist,with difficult to focus on the characteristics of governance.In this paper,the company 35t/h coal-fired angle tube steam boiler as the research object,its flue gas desulfurization and desulfurization project and the use of desulfurization solution design.Through the comparison of the flue gas desulfurization and dust removal process,the present situation of the development of flue gas desulfurization and dust removal technology is analyzed synthetically.Combining with the practical problems in the process of boiler flue gas emission,a set of economically feasible desulphurization and dust removal design of coal-fired corner steam boiler.For the recovery of SO2 after the desulfurization solution compared to a different recovery program,a comprehensive selection of practical recycling program,the recovery of(NH4)2SO4 can be sold,both to reduce the waste disposal costs,but also increased by-product economy efficiency,reducing the project investment and equipment operating costs.The implementation of the design reduces the secondary pollution in the production and treatment process,to achieve the second use of waste,turning waste into treasure,and achieved certain economic benefits,and meet the relevant national standards for flue gas emissions.In this program,the tube-type steam boiler uses Class II bituminous coal,the calorific value is?5000kcal/kg,the volatile content is below 20%,the ash content is more than 30%and the sulfur content is less than 1.2%.After the implementation of the design,the installation and commissioning,bag filter removal rate of up to 99.37%,soot reduced 180 kg/h,working hours by 7200h/a,can reduce dust emissions 1283.04t/a,for the reduction of atmospheric PM2.5,The elimination of haze to the community caused by the troubles,have a good improvement effect;ammonia desulfurization tower SO2 removal rate of up to 98.29%,SO2 reduced 120.56kg/h,working hours by 7200h/a,90%,Coal combustion 5.2t/h,can reduce the SO2 emissions of about 868.03t/a,as the acid rain control area to improve the atmospheric conditions have a very good effect;using ammonia after desulfurization by-product(NH4)2SO4 solution,the MVR product(NH4)2SO4 1853.28t/a,after the implementation of the program to reduce the waste water,waste generated,reduce environmental pollution,and achieved some economic benefits,with a good demonstration. |
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