China's activated carbon production coal is mainly concentrated in the northwest region, there are long bituminous coal, weak viscous coal and anthracite, due to the single coal properties of the restriction, China's coal-based activated carbon products are mostly in the middle and low grade products.Coal based activated carbon production in China, starting in the 1950 s, but slow to develop early in the early 1980 s the national annual production of about 4 000 t [2 l. Along with the reform and opening up, economic development and the gradual improvement of the people's living standard and increasing efforts in environmental protection at home and abroad in recent years, domestic demand of activated carbon, and exports continue to increase, coal based activated carbon industry is developing rapidly. In the late 80 s, China's coal-based activated carbon produced more than 20000 tons, in 2000 reached 100000 tons, 400000 tons in 2008 or so,China has basically formed an independent, complete and initial industrial system for the preparation of activated carbon, and has become the world's largest producer of coal-based activated carbon.Due to the advantages of coal resources and product price, China's coal-based activated carbon products have a strong competitiveness in the international market.In order to provide reference and theoretical basis for the preparation and selection of activated carbon for the adsorption of dioxins, this paper carried out a study on the combined technology of activated carbon injection and double bag dust collector, the characteristics of activated carbon adsorption for dioxins and the influencing factors of activated carbon adsorption for dioxins.The adsorption and desorption isotherms of 13 kinds of commercial activated carbon were determined by low temperature nitrogen adsorption method, and the physical structures of activated carbon were calculated according to BET, T-Plot, BJH and DFT theory, and the iodine value and methylene blue value of 4 kinds of activated carbon were detected.In view of the characteristics of large amount of matter and high content of benzene organic matter in gas, the method of removing these substances is studied and the solution is given.
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In this study, the concentration of benzene, naphthalene and ash in gas before purifying feed-gas compressor was determined by chromatograph, picric acid titration and weighing method respectively. According to the measured values, the experimental flow was designed, and coke column and activated carbon column were made by themselves.In recent years, some foreign activated carbon manufacturers have developed coal-based activated carbon with special adsorption capacity by adopting new processes, new methods and advanced raw material treatment technology, which has greatly improved and enhanced the performance of coal-based activated carbon products, expanded the application field and highlighted a broader market prospect.activated carbon manufacturer