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 ℃
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.
如何選擇適合于自己工程的脫硝工藝，應主要從以下幾個方面綜合考慮：
How to choose the denitration process suitable for your own project should be comprehensively considered from the following aspects:
(1)NOx排放濃度和排放量必*滿足排放標準及有關環(huán)境保護的要求：
(1) NOx emission concentration and emission must * meet the emission standards and relevant environmental protection requirements:
(2)脫硝工藝要適用于本工程已確定的燃料條件，并考慮燃料來源的變化可能性;
(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)脫硝丁藝技術成熟、設備運行可靠，并有較多成功的運行業(yè)績：
(3) Denitration Dingyi has mature technology, reliable equipment operation, and more successful operation performance:
(4)脫硝裝置占地面積小，投資費用省;
(4) The denitration device covers a small area and saves investment costs;
(5)脫硝劑要有穩(wěn)定可靠的來源：
(5) The denitration agent should have a stable and reliable source:
(6)運行、檢修和維護費用小。
(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 http://szzcsj.com
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