Using DC Corona Discharge To Remove C₄H₄S From Dust-laden Gases

In recent years,the phenomenon of air pollution has become more and more serious.People's concern for air pollution has also increased.Industrial exhaust gas is a major source of air pollutants.Industrial exhaust gas not only contains toxic and harmful gases such as H₂S,SO₂,NOx,C₄H₄S,COS,but also dust solid pollutants.C₄H₄S gas will not only seriously affect the quality of the products in industrial production,but also will damage the industrial equipment used in production,reduce the life of the catalyst used in the production,and the industrial exhaust gas directly discharged without treatment will cause human health and ecological environment.Threatened.Dust particles are also a serious hazard,which not only increases the risk in the production process,but also has serious damage to human health.In the traditional gas purification process,the dust in the gas is generally first removed by physical methods,and then the gas is introduced into the next section to remove the pollutants.This method not only consumes resources,but also has complicated operation,unstable processing,etc.Therefore,it is particularly important to find a gas purification technology that can remove both dust and C₄H₄S.In this paper,DC corona discharge is used to separate and purify the C₄H₄S gas containing dust,and a dust-containing C₄H₄S gas is prepared using a gas distribution system.The experiments mainly investigated the effects of input energy,oxygen content,discharge gap,electrode shape,residence time,inlet concentration,reaction temperature,and dust on the removal of C₄H₄S.The differences in gas before and after the reaction were analyzed by means of GC,FT-IR,etc.,and the changes of the components before and after the dust reaction were analyzed by XRD to examine and analyze the effect and principle of using DC corona discharge to treat the dust-containing C₄H₄S gas.After experimental analysis,this article has obtained the following conclusions:The conversion rate of C₄H₄S increases with the increase of input energy,and C₄H₄S is eventually converted to CO,CO₂,SO₂,etc.under the action of DC corona discharge.As the energy input increases,part of SO₂ is oxidized to SO₄^2-.Since O₂ is an electronegative gas,the higher the concentration of O₂ is,the more stable the discharge effect will be,and the higher the O₂ content,the more energy will be exerted on O₂ to turn it into O radical and O₃,resulting in action on C₄H₄S.The energy is reduced,so the conversion rate of C₄H₄S decreases as the O₂ content increases.The larger the discharge gap is,the higher the maximum voltage the reactor can reach,but the effect of C₄H₄S removal decreases with the increase of the discharge gap under the same energy input condition.The zigzag and fish-bone discharge electrodes have a poor treatment effect on C₄H₄S,and cylindrical electrodes have the best treatment effect on C₄H₄S.The conversion of C₄H₄S increases with the residence time of the gas in the reactor.With the increase of the concentration of C₄H₄S,the conversion rate of C₄H₄S gradually decreases under the same SIE,but the energy yield EY increases.The conversion rate of C₄H₄S decreases with increasing temperature,and when the temperature is 200°C,the breakdown voltage of the reactor drops to 10kV,and the conversion rate of input energy decreases.When using DC corona discharge to purify dust and C₄H₄S at the same time,dust has a significant role in promoting the conversion efficiency of C₄H₄S,and inhibits the production of SO₂.The XRD analysis of the dust before and after the reaction showed that there was no calcium sulfate?CaSO₄?,aluminum sulfate?Al₂?SO₄?₃?and other substances in the dust after the reaction,indicating that the sulfur element in the C₄H₄S was in the DC corona discharge.It reacts with the dust and produces sulfates and sulfides.