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Daqing refining acrylonitrile plant cleverly uses return steam
Recently, the energy-saving transformation project of acrylonitrile medium pressure steam of Daqing Refining and Chemical Company No.
1 Power Plant has achieved remarkable
results.
Through the technical calibration during the trial operation of the equipment, calculated according to the annual operation of 4,000 hours, it can save 439,270 yuan
per year.
The 3.
5MPa medium-pressure steam generated by the acrylonitrile plant of the refining company is returned to the power station of the first power plant, due to the low temperature and large water content, it cannot be directly integrated into the existing medium-pressure steam pipeline network for operation, and can only be depressurized by the temperature and pressure reducer, and transported to the 1.
0MPa low-pressure steam pipe network, resulting in energy waste
.
To this end, the power plant No.
1 changed the drive device of the power station # 2 feed pump from motor to steam turbine, and used the medium-pressure steam returned by the acrylonitrile device to do work to drive the feed water pump to run
.
After doing work, the medium pressure steam drops to low pressure and directly enters the low-pressure steam pipe network, thus realizing the energy
use of the cascades.
(Wang Feng)
