Research On Application Of Denitration Technology Of LuQuan Cement Clinker

The cement industry is the industry which processes mineral raw materials, and the production facilities it used are usually large-scale heavy equipment, so it is one of the most serious professions to the atmospheric environment. The economic development is growing faster and faster since China's reform, cement production scale is larger and larger, and the environmental pollution is increasingly serious. NOx emissions standard of cement industry in recent years is gradually improved, and it promotes the reform of cement denitration technology to adapt to the environment and the laws. Aim at 4000 t/d clinker production line of exhaust gas current situation of Luquan Jinyu Dingxin cement Co. LTD. Third branch, we do the research of the cement industry mature denitration technology at home and abroad, and then, put forward "air gradation combustion and low nitrogen combustion+ SNCR coupling technology" of removing denitrifying process, and discussed the SNCR craft parameter, implementation plan, and application in industrial production and its application effect were investigated.1) Luquan Jinyu Dingxin cement Co, LTD. third branch was equipped with the air gradation combustion technology initially and low nitrogen combustion retrofit and acceptance. To meet the technical index requirements of cement dry furnace, actual operation condition of NOx exhaust gas content is 400 mg/m3 or less, after removing denitrifying process selection and the temperature of 1050? can achieve SNCR process requirement, at the same time the space is narrow, not allowed to add more equipment. Using "hierarchical+ low nitrogen combustion air+SNCR coupling technology" can meet the demand exhaust emissions of NOx<400 mg/m3.2) SNCR process takes ammonia as reducing agent, the main system includes ammonia storage system, the transmission module of ammonia and ammonia solution injection system. The denitration system is a relatively safe set of device. All water appliances are water-saving products, the water pressure and water points are controlled and meter is installed etc. SNCR system construction investment is 8,030,000 yuan.3) Project completion environmental protection acceptance monitoring results show that the emission concentration of NOx and ammonia in waste gas consistent with the cement industry air pollutants emission standard "(GB4915-2013) the requirements of emission limit standard in table 1; Ammonia unstructured emissions in accordance with the "cement industry air pollutants emission standards" (GB4915-2013) the requirements of the standard limit in table 3; Day and night of noise at boundary of the project to upgrade value consistent with the emission of environmental noise within the boundary of industrial enterprises "(GB12348-2008) third criteria in table 1. It can reduce the amount of nitrogen oxide emissions of about 1114.44 t/a, environmental benefit and social benefit are remarkable.