Abstract: New c leaning t echnology i s a dopted f or re moving de posits i n g as pi pelines unde r ne gative
pressure to handle the blockage. Normal production is not interrupted while solving the operation
problem. This technology helps to save costs and ensure operation safety，with no need of access
into the pipes for manual cleaning. Deposits in gas pipes can be removed thoroughly and efficiently.
The new technology provides great experience to be shared in co king industry.

Key words: Coking plant, Deposit clearance from equipment, Gas pipe under negative pressure,
Gas exhauster