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湿法、半干法、干法三大类脱硫工艺。常见的脱硫方法为钙法脱硫与氨法脱硫，炉内喷钙、等离子、海水脱硫等市场很小，仅适用与特殊情况。
There are three major types of desulfurization processes: wet, semi dry, and dry. The most common desulfurization methods are calcium based desulfurization and ammonia based desulfurization. The market for furnace injection of calcium, plasma, seawater desulfurization, etc. is very small and only suitable for special situations.
湿法脱硫技术较为成熟，效率高，操作简单。传统的石灰石/石灰—石膏法烟气脱硫工艺采用钙基脱硫剂吸收二氧化硫后生成的亚硫酸钙、硫酸钙，由于其溶解度较小，极易在脱硫塔内及管道内形成结垢、堵塞现象。
Wet desulfurization technology is relatively mature, efficient, and easy to operate. The traditional limestone/lime gypsum flue gas desulfurization process uses calcium based desulfurizers to absorb sulfur dioxide and generate calcium sulfite and calcium sulfate. Due to their low solubility, they are prone to scaling and blockage in the desulfurization tower and pipelines.
双碱法烟气脱硫技术是为了克服石灰石—石灰法容易结垢的缺点而发展起来的。随着新环保法的逐步实施，对脱硫效率要求也越来越高，能满足脱硫效率的脱硫方式唯有钙法与氨法，但是钙法脱硫存在工艺复杂、堵塞、腐蚀、硫石膏堆置等问题，但仍是当前的主流脱硫方式；
The dual alkali flue gas desulfurization technology was developed to overcome the disadvantage of easy scaling in the limestone lime method. With the gradual implementation of the new environmental protection law, the requirements for desulfurization efficiency are also increasing. The only desulfurization methods that can meet desulfurization efficiency are calcium method and ammonia method. However, calcium method desulfurization has problems such as complex process, blockage, corrosion, and sulfur gypsum stacking, but it is still the current mainstream desulfurization method;
氨法脱硫方式工艺较简单，不会产生任何废弃物，且产生的硫酸铵可以做复合肥，但仍存在投资较大，运行费用较高的问题。氨法脱硫是当前问题少的脱硫方式，也是以后的主流趋势，新的脱硫脱硝一体化技术已逐步完善，能够达到新环保法超低排放的标准。
The ammonia desulfurization method has a relatively simple process and does not generate any waste. The generated ammonium sulfate can be used as a composite fertilizer, but there are still problems with high investment and operating costs. Ammonia desulfurization is currently the least problematic desulfurization method and also the mainstream trend in the future. The new integrated technology of desulfurization and denitrification has been gradually improved, which can meet the ultra-low emission standards of the new environmental protection law.
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