Problems with internal compression air separation in coal chemical industry
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Hello everyone. I would like to ask whether, in a two-stage air separation unit powered by a steam engine, the compressor and the booster operate simultaneously during startup. If that is the case, how exactly should the operation be carried out?
First, it’s the turbine alone; then, the turbine is used to start up the air compressor for testing; after that, the turbine, air compressor, and booster are tested together. You can choose the appropriate temporary gas source for starting the booster according to your own procedures!
The three units are started up once the required conditions are met. Just click the start button. Then the turbine, air compressor, and booster started to operate
I have a question regarding the two units upstairs: once the air compressor starts, the pre-cooling system should be activated first, followed by the purification system. Since the gas supplied to the booster pump comes after passing through the molecular sieve, when the air compressor starts, the booster pump also starts. But how can it operate without pure air at that point? Is the inlet of the booster machine turned on? I work in the field of steel and air separation; here it’s better to use synchronous or asynchronous motors for driving it separately, as that makes things easier to manage. I would like to ask how temporary shutdowns and restarts are handled in coal chemical processing when a 1-to-2 drive system is used
The booster has an inlet start-up pipeline, and the air supply generally comes from the backup system
Reply to 4# jihongli0315@: The origin of a pressure booster can generally be understood in this way: one option is to use a temporary piping system for pressurization, so that you can pressurize the booster before starting it up； Secondly, you can connect the pre-cooling and purification gas circuits, after which the purified air will enter the booster pump ； Both of these methods can safely start the unit!
The inlet and outlet valves of the booster are fully closed, and the return valve is fully open
The inlet and outlet valves of the booster are fully closed, and the return valve is fully open
For the booster pump, the inlet and outlet valves are slightly open, while the return valve is fully open; that’s how we operate it
Thank you everyone, I understand. I’m truly grateful to everyone
You’re welcome. Feel free to come by often, and I hope you’ll also be eager to help solve the questions raised by others!