Study on the condition of optimal thermal treatment technology of coal tar Ditch
ZHANG Zhong-ming
WU Xiao-su
Abstract：In order to produce the high density pitch coke in delayed coking tower, the coal tar pitch should be pretreated so that the insoluble matter can be eliminated and components can be modulated. The process of coal tar pitch modification was organized by means of the tube furnace and vacuum flash distillation tower, meanwhile digi-talization control system was adopted to monitor all round process flow. Relationship among yield rate of heavy flashoil and other related parameters were identified by appropriate network structure and the net train algorithm, the network error and the number of ulterior layer and the convergence tendency of network were discussed applying for the stability theory at the same time. The results show that raising the outlet temperature of tube furnace properly can increase the yield of heavy flash oil, but too higher temperature can increase the viscosity of the material and lead to heat treatment condition degenerates rapidly. The limited parameters' sampling and the nonlinear curve fitting can weaken the randomization of the original data and it will converge to the satisfactory precision through model modifying uninterruptedly, in this way the optimal thermal treatment condition can be searched in a short period.
Keywords：coal tar pitchthermal treatment technologypitch cokeconvergence
Publication Date：2009-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 1687-1692 )