Post-compressor cooling issues in rich gas compressors
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In catalytic cracking rich gas compression systems, multi-stage compression is generally used, and the temperature of the compressed rich gas at each stage as well as after compression is relatively high. Is it possible to use heat transfer water to recover the heat from the compressed rich gas? ? Instead of simply using air cooling or water cooling to lower the temperature of the rich gas? ? I wonder if this will work? ? Is it the issue of recovering low-temperature heat? ? Thank you all! !
It seems like it’s a good suggestion. Our parameters are as follows: the compressor uses two-stage compression, and the temperature at the outlet of each stage is around 110 degrees. Currently, after water cooling, the temperature drops to a little over 40 degrees; so it would be useful to make use of this feature. If the temperature after two-stage compression and cooling is too high, then it becomes difficult to meet the requirements for gas-liquid separation in the balancing tank. Cooling is required at the inlet of the second stage of the compressor, and the system has high requirements in this regard, probably to avoid affecting stable production. Nevertheless, it’s still quite useful to make use of this feature
The requirements are high; it is feasible in principle, but difficult to implement in practice, with high demands on materials: P
I think it is feasible; the stability issues can be resolved: whether it’s between stages or at the back of the machine, low-temperature heat should first be recovered and then condensed using cooling water, and some adjustments can be made in terms of control – this approach is entirely workable. My feeling is that I hope those present can further point out the problems associated with such an idea ? Thank you
The outlet of the rich gas compressor at Luoyang Coking uses low-temperature heat recovery, and it is operating well.
The method is feasible, but the operating costs of the upgraded units can be compared with those at present; in reality, the costs involved in such upgrades are not low.
The specific heat of the gas is not very high, and its volume does not change either; therefore, the amount of heat released is limited. Additionally, there are requirements regarding the cooling temperature of the gas after the intercooler; a lower temperature after cooling is beneficial for compression, which makes it difficult to find an appropriate way to utilize this aspect!
Theoretically, it should be possible, but it is necessary to ensure the inlet temperature at the next stage. In practice, I agree with what was said on the 6th floor: the cost of carrying out such modifications is indeed high. The most important thing is to consider where to utilize this system, and it is essential to take into account the possibility of leaks within the tubes; failure to detect such leaks in a timely manner can have serious consequences.
Personally, I think it is feasible, but it is necessary to improve the material of the heat exchanger tubes. At the same time, attention must be paid to monitoring the medium after heat extraction, as well as to improving the process operations.
Theoretically feasible, but it’s a bit difficult to implement
I work at Beijing Jin Kai Wei, which manufactures compressors. Could the original poster provide more details? I want to learn more*.