China is a large coal-fired country, and coal is the support of the coking industry. The coking industry produces a large number of pollutants such as sulfur dioxide and nitrogen oxides in the production process. In order to meet the emission standard of flue gas, we should formulate an appropriate desulfurization and denitration process route.

SDS納基干法脫硫是適應焦爐煙氣工況的脫硫技術，SDS納基干法脫硫是將脫硫劑（20-25pm，成分碳酸氫鈉）均勻噴射在管道內，脫硫劑在管道內被熱激活，比表面積大，與焦爐煙道氣充分接觸，發生物理、化學反應，煙氣中的S02等酸性物質被吸收凈化，凈煙氣由增壓風機經出口煙道至原煙囪排入大氣。

SDS nano based dry desulfurization is a desulfurization technology suitable for coke oven flue gas conditions. SDS nano based dry desulfurization is to evenly spray the desulfurizer (20-25pm, component sodium bicarbonate) into the pipeline. The desulfurizer is thermally activated in the pipeline, with large specific surface area and full contact with coke oven flue gas, resulting in physical and chemical reactions. S02 and other acidic substances in the flue gas are absorbed and purified, and the net flue gas is discharged into the atmosphere from the booster fan through the outlet flue to the original chimney.

1. 無需增設脫硫塔，不需要大量固體循環灰在塔內循環，也不需要噴入漿液，系統簡單，運行阻力低，操作維護方便。

1. There is no need to add desulfurization tower, no need for a large amount of solid circulating ash to circulate in the tower, and no need to inject slurry. The system is simple, the operation resistance is low, and the operation and maintenance are convenient.

2. 脫硫效率高，脫硫劑可以合理均勻布置。

2. The desulfurization efficiency is high, and the desulfurizer can be reasonably and evenly arranged.

3. 一次性投資很少，占地面積很小，運行成本低。

3. Little one-time investment, small floor area and low operation cost.

4. 全干系統、無需用水，煙氣排放始終保持良好的視覺效果；

4. All dry system, without water, and the flue gas emission always maintains a good visual effect;

5. 對酸性物具有100%的脫除率。

5. 100% removal rate of acid.

6. 靈活性很高，對焦爐煙氣流量、SO2濃度等工況的變化適應性較強，可以隨時適合嚴格的排放指標。

6. High flexibility, strong adaptability to changes of coke oven flue gas flow, SO2 concentration and other working conditions, and can be suitable for strict emission indicators at any time.

7. 腐蝕性輕微，基本不用采取特殊防腐措施，但需采取相應防磨措施。

7. The corrosivity is slight, so special anti-corrosion measures are basically not required, but corresponding anti-wear measures shall be taken.

針對當前已投入應用的脫硫脫硝工藝來看，多種工藝都可滿足超低排放標準，焦化行業可根據自身具體需求選擇更有利的工藝。與此同時焦化行業也應加強技術操作，進一步提升當前工藝裝置設備的安全性與穩定性，對前端煙氣控制技術的研究力度應提高，爭取在源頭對污染物排放嚴格控制。

In view of the desulfurization and denitration processes that have been put into use at present, a variety of processes can meet ultra-low emission standards, and the coking industry can choose more favorable processes according to its own specific needs. At the same time, the coking industry should also strengthen technical operation, further improve the safety and stability of current process units and equipment, strengthen the research on front-end flue gas control technology, and strive to strictly control pollutant emission at the source.

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