Recovery of flare gas in refining systems
Thread Content
Our plant recovers the refinery flare gas using screw compressors to use it as fuel, and the system is currently operating quite stably. Technical specifications of the screw compressor: 600 cubic meters per hour, inlet pressure of 1–5 kPa, outlet pressure of 0.95 MPa, and outlet temperature not exceeding 90°C. Dear sea friends, please share information on the recovery of refinery flare gas in your respective companies. Any good experiences or practices available can serve as a reference for everyone!
What is the size of your gas holders? Wet or dry?
Reply to 2# May Snow: There is no gas holder; it is directly fed into the low-pressure pipeline network.
I’m asking, isn’t the gas coming in at the compressor inlet from the gas holder? Will the gas pressure be 0.95 MPa after compression by the compressor? What is the pressure in your gas pipeline network?
Reply to 4# May Snow: The compressor is installed directly on the flare line, with an inlet pressure of 1-5 Kpa. The current outlet pressure is 0.9 Mpa.
Your process must be wrong. First of all, the low-wattage pressure definitely won’t be 0. 9 MPa. Also, your description of the function of the compressor is quite vague. The function of the compressors in our factory is to compress and recover low-wattage energy.
Reply 6# Production Department: The compressor is used for flare recovery.
May I ask what the calorific value of your torch gas is in J/m³? What are the components it contains?
The screw compressor should be just part of the equipment used to recover flare gas, right?
It should be the flare gas inlet tank, where the gas is pressurized by a screw compressor and then fed into the spherical tank before being supplied to the high-pressure gas system. And 0.95 MPa is too high, right? You don’t mean the torch gas recovery system, do you?
Reply to 8# wenya1007: The main components of torch gas are methane, ethane, hydrogen, etc.