The SDS dry acid injection technology involves uniformly spraying desulfurizer into the pipeline. The desulfurizer is heated and activated in the pipeline, with its specific surface area increasing rapidly. It fully contacts acidic flue gas to undergo physical and chemical reactions, and acidic substances such as SO₂ in the flue gas are absorbed and purified.

The SDS desulfurization process has excellent regulation performance. The operation and shutdown of the desulfurization device do not affect the continuous operation of the coke oven, and the load range of the desulfurization system is coordinated with that of the coke oven, ensuring reliable and stable continuous operation of the desulfurization system. The technical features of this process are as follows:(1) Simple system, easy to operate and maintain;(2) Low one-time investment and small floor area;(3) Low operating cost;(4) Fully dry system, no water required;(5) High desulfurization efficiency;(6) Reasonable desulfurizer uniform distribution device;(7) High flexibility, adjustable at any time according to emission index requirements;(8) Good removal effect on acidic substances;(9) Strong adaptability to coke oven operating conditions;(10) Small amount of by-products, high-purity sodium sulfate, easy to recycle and reuse;(11) The system is equipped with an emergency channel quick-switch device, so that the normal production of the coke oven is not affected in case of failure.