Taking the 2.2 million t/a catalytic cracking unit of Hebei Delong Environmental Engineering Corporation Ltd.as an example, the process technological scheme for eliminating wet plume from chimney outlet was discussed. The results show that the MGGH composite technology system of heat exchange + absorbing liquid spray condensation can eliminate "white smoke"at 0 ℃ and above, and meet the emission standards of environmental protection requirements,and have the advantages of small area, low energy consumption and investment, and remarkable effect and so on.
