The invention relates to a
system and a method for recovering
waste gas generated in production of carbon nanotubes by a vapor deposition method. The
waste gas recovery system is technically characterized by comprising a
waste gas pipeline, a waste
gas cooling device, a waste
gas solid separation device, a waste gas static separator, a gas pressurization device, a gas decompression device, a
hydrogen membrane separation device, a
hydrocarbon gas and
nitrogen membrane separation device and a multi-type sensor for collecting the working condition of the
recovery system, the equipment controller is used for controlling equipment on the
recovery system; the waste gas recovery control
server controls the pressure on the two sides of a separation membrane of the
hydrogen membrane separation device and the pressure on the two sides of a separation membrane of the
hydrocarbon gas and
nitrogen membrane separation device to achieve the
gas separation function, the pressure on high-risk gas is reduced, and the
raw material hydrocarbon gas, the working gas
nitrogen and the derivative gas
hydrogen in the waste gas can be separated out and reused. And the requirements of
energy conservation, emission reduction and efficiency improvement on the premise of safe production are met.