催化還原與等離子體聯(lián)合脫硫工藝的研究.pdf

1、華中科技大學(xué)碩士學(xué)位論文催化還原與等離子體聯(lián)合脫硫工藝的研究姓名：余福勝申請學(xué)位級別：碩士專業(yè)：環(huán)境工程指導(dǎo)教師：何正浩20070605華 中 科 技 大 學(xué) 碩 士 學(xué) 位 論 文 華 中 科 技 大 學(xué) 碩 士 學(xué) 位 論 文 Abstract Acid rain is one of the global environmental problems. The sulfur dioxide(SO2) from coal-fir

2、ed electric plants is the leading cause of the acid rain in China, and this situation will not be altered in recent years because of the energy resources structure. Owing to its mature technics, wet limestone(lime)-gypsu

3、m flue gas desulfuration (FGD) process takes the dominant place around the world. But along with its complex system, bulky facilities, high cost in investment and function, also bringing huge waste water which needs afte

4、rtreatment, this system cann’t be considered to be perfect. However, other approaches of FGD are confined by cost or technique for application. The direct reduction of SO2 to elemental sulfur by coupling of catalyst and

5、plasma, being a new approach for SO2 reduction, is studied in this paper. In the process, CO acts as the reductant, SO2 is selectively reduced to elemental sulfur under catalyst and suitable conditions, and the residual

6、SO2 will be disposed by the pulsed discharge plasma. This technics has its own advantages. For instance, the system is compact, and compared with other ordinary FGD process, it’s not necessary to add any alkaline compoun

7、d, which results in much less cost and secondary pollution. What’s more, the end product of sulfur is a kind of important industry stuff. This paper was supported by the Office of Science & Technology of Wuhan. In th

8、is paper, two sets of process were designed, one was for coal-fired boiler gas in laboratory with the gas flux of 10Nm3/h, and another for power plant flue gas with the flux of 1670Nm3/h in Hubei Huadian Huangshi Electri

9、c Power Co. Ltd. Then, the apparatus of the two series were designed and made. The reaction conditions and their controlling skills were also concerned. After the equipments were set and adjusted, experiments were carrie

10、d out, the efficiency of SO2 reduction achieved more than eighty percent when the gas flux was 1670Nm3/h and the SO2 inlet concentration was 1000~2000ppm. The end product was detected as elemental sulfur. Taking both tec