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纳基干法脱硫是适应焦炉烟气工况的脱硫技术，SDS纳基干法脱硫是将脱硫剂（20-25pm，成分碳酸氢钠）均匀喷射在管道内，脱硫剂在管道内被热，比表面积大，与焦炉烟道气充分接触，发生物理、化学反应，烟气中的S02等酸性物质被吸收净化，净烟气由增压风机经出口烟道原烟囱排入大气。

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. 无需增设脱硫塔，不需要大量固体循环灰在塔内循环，也不需要喷入浆液，系统简单，运行阻力低，操作维护方便。

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. 脱硫效率高，脱硫剂可以合理均匀布置。

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

3. 一次性投资很少，占地面积很小，运行成本低。

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

4. 全干系统、无需用水，烟气排放始终保持良好的视觉效果；

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

5. 对酸性物具有100%的脱除率。

5. 100% removal rate of acid.

6. 灵活性很高，对焦炉烟气流量、SO2浓度等工况的变化适应性较强，可以随时适合严格的排放指标。

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. 腐蚀性轻微，基本不用采取特殊防腐措施，但需采取相应防磨措施。

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

针对当前已投入应用的脱硫脱硝工艺来看，多种工艺都可满足超低排放标准，焦化行业可根据自身具体需求选择更有利的工艺。与此同时焦化行业也应加强技术操作，进一步提升当前工艺装置设备的性与稳定性，对前端烟气控制技术的研究力度应提高，争取在源头对污染物排放严格控制。

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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