tsarin ƙarancin gas
Cire sulfur dioxide daga fitar gashi na gilashi yana da matukar muhimmanci a cikin hasashen kona kwal. Yana zama wani ɓangare na desulfurization; wato lokacin da sulfur dioxide da aka samar ta hanyar kona mai mai tare da oxygen ya shiga cikin ruwa kamar ruwa kuma ya canza zuwa sulfuric acid kafin a ƙarshe a fitar da shi cikin iska. Ta hanyar amfani da limestone ko lime slurries don shan sulfur dioxide, mun kirkiro wani haɗin sinadarai wanda ke haifar da gypsum mai ƙarfi. Ash ɗin na iya zama ana sayar da su a matsayin kayayyakin da aka samu a wannan lokacin. A yau, tsarin yana amfani da towers masu shan gashi, tsarin shirya slurry, tsarin fitar da ruwa na gypsum da wuraren kula da ruwa. Aikace-aikacen desulfurization na gashi suna samuwa a cikin tashoshin wutar lantarki da aka kona kwal, da kuma cikin injinan siminti da sauran hanyoyin masana'antu da ke fitar da babban abun sulfur dioxide.