How to deal with the problem that the circulating hydrogen amount of the hydrogenation unit is too high at the maximum range?
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The circulating hydrogen compressor of the hydrogenation unit is a reciprocating machine. The circulating volume is always high at the highest range. The instrument personnel said that it cannot be handled. The entire circulating hydrogen system has water cooling, air cooling, and a liquid separation tank in front of the machine. Friends, please tell me how to deal with it? This post was last edited by Zhongyuan people on 2009-3-8 13:08 ]
Has the circulation volume and pressure measuring table been deliquidated?
Reduce the amount of return from the outlet to the inlet, reduce the conversion rate of the reaction, reduce the temperature of the cycle machine inlet, deliquify, reduce the temperature of the cold high fraction, discharge waste hydrogen, and replace new hydrogen
Are there any dangers in overreporting? The motor power is too high? The bed pressure difference is high? In addition to the method above, you can try closing the inlet valve to increase the system pressure difference.
It’s enough if the meter says it can’t handle it. This kind of meter is too irresponsible! You should let them give you an answer.
I guess it's possible: 1. The circulating hydrogen impurity content is high and the molecular weight becomes larger, resulting in a larger compressor quality. The treatment method is to discharge the waste hydrogen and replace it with new hydrogen. 2. The return volume of the compressor inlet and outlet is too large.
If the circulation volume is large, the purity may be low. This has nothing to do with the instrument. You can adjust it yourself, for example, lowering the cracking reaction temperature, releasing hydrogen, lowering the cooling inlet high temperature, etc. Of course, it may also be an instrument failure or measurement deviation, which is the fault of the instrument.
The purity of our circulating hydrogen is above 97%. The flow meter is a differential pressure type. The pressure on the meter is indeed high, and the range cannot be expanded online. Dear friends, please continue to share your opinions and improve together. This post was last edited by Zhongyuan people on 2009-3-9 12:08 ]
If it is determined that there is no problem with the instrument and the post-cooling temperature is also within the index, then the load of the circulating hydrogen compressor can be appropriately reduced to solve the problem. Another thing is to reduce the amount of hydrogen entering the reactor. Our device has a hydrogen line before the compressor outlet to the air cooling, which can adjust the amount of hydrogen mixed into the reactor.
About our circulating hydrogen flow rate exceeding the range: ⒈Expand the measuring range. The field meter is too small and cannot be expanded. We can only wait for the expansion during shutdown. ； ⒉Lower the temperature of the gas-liquid separation tank and improve the purity of hydrogen. The temperature of our gas-liquid separation tank dropped to 29 degrees, which is still at the high limit. ； ⒊Using the out-of-range method, I stopped one air cooler (there are two air coolers), reduced the circulating water volume, and raised the post-cooling temperature to 34 degrees. The problem was finally suppressed for a period of time, and it was completely solved after the shutdown.
The 4th floor is right, turning down the inlet valve will definitely help:)
Let's lower the processing capacity and see why it's so difficult to sell diesel. Let's find out why.