Abstract:

The overall reaction heat effect of residual oil not only reflects coking raw material structure, but also directly affects heavy oil products distribution, so it plays an important role for coking practical production process optimization. In this paper, based on the residual oil thermal reaction evaluation instrument, by static micro-testing, quantitatively measuring the reaction heat effect of residual oil under the condition of different temperature, studying the influence of residual oil thermal effect on coke yield, according to coking industry unit test data to verify theoretical feasibility. The results show that the endothermic effect of residual thermal process is negatively related with coke yield, inferior residual oil cracking endothermic phenomenon at 460 ℃ is stronger than 500 ℃, so it is better for furnace tube to adopt long-range and low intensity heating way. Prolonging the retention time of furnace tube sample in low temperature area and improving the heating load of residual oil, can moderately enhance residual conversion degree before entering reaction zone, can increase the cracking depth of oil sample in coke tower, reducing coke yield and increasing liquid efficiency.

Key words: residue, heat effect, coke yield, static micro test