What is the function of the vapor extractor after the sulfur hydrogenation reactor?

Designed by foreigners? In the past, foreigners would add a pressure fan here.

You haven’t even replied to me. Was it designed by foreigners, or did Chinese people copy a design created by foreigners?

It is generally used at the beginning of operations. It seems that the current design doesn’t do this anymore. The initial design called for a booster to be installed after the quench tower and before the absorption tower; this was intended to be used when the pressure drop across the entire system became too high, and I also thought that boosting the pressure might facilitate absorption better. This booster can also be used to carry out various cycles during the initial stages of operation. Later, I don’t know what the purpose was? Investing? It has been changed to use a steam ejector, and its location has been changed to behind the hydrogenation reactor and in front of the quench tower. One afternoon many years ago, I suddenly had an idea for this plan, thinking that it was my turn to become famous. I checked online and found that someone had already made such a change. But it seems that new devices these days don’t do this either.

The design for the booster is from Shell, while the steam ejector seems to be an invention of our own country’s ingenuity.

It is mainly used in the following operating conditions: 1. When heating up the hydrogenation reactor, the reactor is heated through a pressure-boosting cycle using a gas pump； 2. Used for the pre-sulfidization of the hydrogenation catalyst at startup ； 3. Used for cooling the hydrogenation reactor and deactivating the catalyst during shutdown ； Essentially, it is a pressurization process; this can be achieved using the incinerator blower or by adding an additional circulation fan. When the incinerator blower is used, it requires a nitrogen shaft seal.

The fourth floor is the correct choice; it was mainly used for preparation before starting operations, and it’s hardly used anymore. However, our installation from 2008 is still in use

3D-designed solution: Circulating air lines are added to the inlet and outlet of the exhaust fan, with nitrogen being reused. Zhenhai Design Institute, as well as some other institutes, use steam ejectors in nitrogen circulation.