Preparation Of Desulfurizer Utilizated For H₂S In Fuel Gas By Red Mud (Steel Plant) And Shite Mud (Soda Plant)

In this study, the desulfurizer prepared by red mud from Steel Plant and white mud from Soda Plant were conductded to purify the fuel gas contained hydrogen sulfide.The desulferization process was featured with high purification efficiency,simple preparation mehthod and low energy consumption,easy to regenerate.Also,the available adsorbents were suited to control H2S pollution.H2S is a harmful impurity in the fuel gas.It can not only cause the pipeline and equipment to be corroded so as to influence the follow up processing(as leading to catalyst poisoning) but also seriously threaten the personal safety,belonging to one of the environmental pollution sources which must be controlled.The preparation for a flue gas desulfurizer with red mud from Steel Plant and white mud from Soda Plant. Drying, crushing and sieving the red mud and white mud, joining a few body aids, to prepare molding desulfurizer which is strong, then Flue Gas Desulfurizion activity tests are carried out in fixed bed reactor. In order to improve the preparation technics of desulfurizer and H2S capacity, the ratio of red mud and white mud, body aids content and preparation methods et al are reviewed. XRD is studied to review desulfurizer components and thereby the desulfurizion mechanism is studied thoroughly.The components and content of raw materials are analyzed:The red mud from Qingdao Steel Plant contains iron-oxide 66.57% in all, some CaCO3 and MgO as well;The white mud from Qingdao Soda Plant contains CaCO3 53.21%.The main component of the adsorbents were red mud and white mud. the feasible content that main materials are 90% and the body aids are 10% is ascertained. The best ratio of main materials is red mud:white mud=2:1(wt%), that is to say, red mud 60%,white mud 30%.The main materials are the finer the better. The best components of body aids are binders, pore-making agents, lube. According to the above chosen desulfurizer components and content, desulfurizer is made intoφ3mm and 2-5cm in length after mixing well-proportioned in water and crushing it strip-shaped in extrusion press. The desulfurizer which dried at 110℃for 6h,then calcined at 600℃in muffle 6h, has best desulfurizion effect.The optimal reaction conditions of desulfurizer were reviewed.Those show:the desulfurizer must react in a low temperature, the desulfurizion effect is very good in 50～70℃.The space velocity has a great effect on desulfurizion, the less the greater in 400～1200 h-1. The H2O content in fule gas also has a great influence on desulfurizion, the best content is7.28%, more or less is not well. The O2 content in fule gas has a great effect on desulfurizion too, according to the O2 Content in the fuel gas,the more the better, until 2% in best. The optimal conditions of H2S removal were desulfurization temperature:50℃, H2O content:7.28%, O2 content:2%, when space velocity is 400h-1, the sulfur capacity of the best desulfurizer reaction could get to 25.3%.The aim of this paper is to purify the fuel gas contained hydrogen sulfide with red mud from Steel Plant, and white mud from Soda Plant, and the good effect is conformed. This task "treat waste by waste", makes the economy and environmental protection win-win. It has a very practical significance in China.