炉前煤低温干馏的工艺研究

For the development of a process of low temperature coal pyrolysis combined with CFBC, a hot moving-bed facility with a capacity 10kg/h of coal feeding was set up, in which high volatile bituminous coals pyrolysis by solid heat carrier was carried out. Two modifications were made in the new process. One modification is that the baffle mixing is used instead of agitated mixing; the other modification is that the granular bed is applied to the dust collection from pyrolysis gas. Compared with the fixed-bed experimental results in which coal and solid heat carriers are mixed by screw propeller, the baffle mixing is more effective. The effects of operating parameters on the dust collection of granular bed were investigated experimentally. It is concluded that the dust content in tar is reduced and the granular bed is suitable for the process of low temperature coal pyrolysis. In addition, the operating characteristics of the moving-bed system are discussed.