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Experimental Study on Dust Movement in the Multievel ESP

Author: ZhangWenYue
Tutor: LiuZhiQiang；LiQing
School: Hebei University
Course: Environmental Engineering
Keywords: ESP fine dust ion wind agglomeration particle size distribution
CLC: X701.2
Type: Master's thesis
Year: 2011
Downloads: 56
Quote: 0
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Abstract


With the development of human society, it is the higher requirement of the living environment. However, the large amounts of dust be produced, because the coal was used as the main energy in industrial production process in our country. As the main equipment for the pollution control, ESP have been well developed in basic theory and application of technology. But it is not ideal about the collection of fine dust by ESP, thus improving the collection efficiency of fine dust become to be the focus of ESP. In this paper, the working principle of ESP, the various factors about collection efficiency of ESP and the coagulation of fine dust in the ESP have been discussed. The multi-stage ESP which running in the working conditions has been as the researching object, the collected dust be measured by Laser Particle Size Analyzer, and the results be analyzed. The main work as follows,1. The process of natural coagulation and the electricity coagulation in the ESP has been analysis, and the changes about the electricity coagulation efficiency with different voltage. The results show that the two coagulation of dust existing all the time. The coagulation of dust be promotion by electric field. In addition, the coagulation effect will be improved with the voltage increases; in the ESP, the fine dust be collected main by electric coagulation.2. The movement and size distribution of dust in the ESP which with various electric field and different voltage, and collection scale of the fine dust as been the focal point. At last, the best voltage combination has been fixed. The research results show that, in the three-stage ESP, it is play the role of pre-treatment when the voltage is 25kV and with the bad collection; In multi-level ESP, the large size dust were collected under the settlement and collection in the preceding field, for this reason, the ration of the fine dust has been increased in the secondary electric field. Furthermore, the dust collection efficiency can’t be improved by only enhance the work voltage. Simultaneously, by analyzing, it is best combination of 35kV/50kV/50kV for three-stage ESP.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Exhaust gas processing and utilization > Smoke and dust
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