【Daily Question No. 325】November 27, 2018
Thread Content
【Daily Question No. 325】November 27, 2018: How is the low-pressure in the hydrogenation unit controlled? The pressure of low-pressure exhaust is controlled by regulating the amount of low-pressure exhaust gas discharged. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
It is achieved by controlling the pressure of the high-pressure separator and the pressure of the inter-stage liquid separation tank of the fresh hydrogen compressor, using a pressure progressive self-balancing control method that combines stepwise pressure setting with selective control
The pressure in the high-pressure reaction system is maintained by a pressure control valve located on the vapor line at the inlet of the circulator, which controls the injection of make-up hydrogen. Hydrogen supplementation also serves to compensate for the hydrogen consumed by the system. In emergency situations, in order to prevent the reactor from experiencing overpressure and excessive temperature rise, the emergency pressure relief valve assemblies located on the vapor line at the outlet must be activated to rapidly reduce the pressure within the reactor.
Control the amount of low-pressure gas discharged.
Achieved by controlling the pressure of the cold low-pressure tank
The pressure of low-pressure exhaust is controlled by regulating the amount of low-pressure exhaust gas discharged.
Controlling the release of low-pressure gas is also related to the low liquid level
If low-pressure gas is to be discharged directly, the required pressure can be controlled directly via a pressure control valve. If it is returned to the inlet of the new hydrogen machine, control is carried out based on the pressure at that inlet; generally, the pressure in the low-pressure gas separation system is maintained at around 2.4 Mpa. Either too high or too low a pressure can affect the amount of hydrogen sulfide present in the low-pressure gas.
The pressure in the high-pressure reaction system is maintained by a pressure control valve located on the vapor line at the inlet of the circulator, which controls the injection of make-up hydrogen. Hydrogen supplementation also serves to compensate for the hydrogen consumed by the system. In emergency situations, in order to prevent the reactor from experiencing overpressure and excessive temperature rise, the emergency pressure relief valve assemblies located on the vapor line at the outlet must be activated to rapidly reduce the pressure within the reactor.
Controlled through the control valve of the low-pressure gas discharge device