At present, the measures to control flue gas NOx emission are roughly divided into three categories: one is low NOx combustion technology, which is mainly characterized by combustion optimization, staged combustion of air and fuel, and flue gas
Recirculation and low NOx burners control the temperature of the combustion area, the amount of excess air and fuel, or reduce NOx generated in the combustion process, so as to reduce NOx
Emission, this technical measure can generally reduce the NOx emission concentration by 30% - 60%. The other is flue gas purification technology. Zui is a typical flue gas purification method, namely selective catalyst denitration (SCR),
Its denitration efficiency can reach 80% - 90%; The third type is furnace spray denitration technology (SNCR), which is mainly characterized by spraying reductant in a specific area on the upper part of the furnace to make
It reduces the generated NOx under certain temperature conditions, and the typical injection material is furnace ammonia injection Ammonia and NOx in flue gas are at a narrow temperature of 950 ~ 1050 ℃
范围内发生反应，生成氮气和水，NOx降低率一般为30%70%，该技术投资少，运行费用也低J。
The reaction takes place within the range to generate nitrogen and water, and the NOx reduction rate is generally 30% to 70%. The investment of this technology is small, and the operation cost is also low J.
如何选择适合于自己工程的脱硝工艺，应主要从以下几个方面综合考虑：
How to choose the denitration process suitable for your own project should be comprehensively considered from the following aspects:
(1)NOx排放浓度和排放量必*满足排放标准及有关环境保护的要求：
(1) NOx emission concentration and emission must * meet the emission standards and relevant environmental protection requirements:
(2)脱硝工艺要适用于本工程已确定的燃料条件，并考虑燃料来源的变化可能性;
(2) The denitration process shall be applicable to the determined fuel conditions of the project, and the possibility of changes in fuel sources shall be considered;
(3)脱硝丁艺技术成熟、设备运行可靠，并有较多成功的运行业绩：
(3) Denitration Dingyi has mature technology, reliable equipment operation, and more successful operation performance:
(4)脱硝装置占地面积小，投资费用省;
(4) The denitration device covers a small area and saves investment costs;
(5)脱硝剂要有稳定可靠的来源：
(5) The denitration agent should have a stable and reliable source:
(6)运行、检修和维护费用小。
(6) The operation, overhaul and maintenance costs are small.
The above is a detailed introduction about dry desulfurization, which I hope will be helpful to you If you have any questions, please contact us We will provide you with professional service https://www.hneee.net
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