Recycling of packing gas in circulation machines
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Does the packing gas of the ammonia cycle machine, which contains oil, water, and ammonia, require any special treatment when being recycled to the first stage of the compressor? If it is not addressed, what impact will it have on the subsequent processes? I hope everyone will share their insightful opinions
It would be better to go through hydrogen and ammonia recovery first. This is just my personal opinion!
Regarding the recovery of the filler gas from the cycle machine, I believe its value is not high. We have determined that the excess amount is not significant; when there is significant leakage from the filler box, it is necessary to reverse the process. Moreover, due to the low pressure, the gas can only be recovered at the inlet of the compressor stage. Since there is oil and ammonia present, it is necessary to separate the oil and wash the ammonia, which results in high investment costs and makes it uneconomical. Process equipment management should be strengthened to improve the quality of maintenance and reduce air leaks. Additionally, by upgrading to a turbine, there is no more packing gas; that’s how we do it.
This post was last edited by ZZJJAA70 on 2010-4-27 at 23:22. Our company’s current practice is to collect it in the gas tank, that is, the gas tank located before the compressor, as mentioned by our colleagues. A portion of the gas can be recovered. But I think this is indulging workshop management. Before we initiated the recycling process, out of our 4 sets of synthesis cycle machines, only one set had filler leakage; for the other sets, if leakage occurred, the machine would be shut down for repair, with no significant impact. Since the recycling began, all 4 sets of synthesizers in each cycle machine have been leaking air. Most people think that since it’s already been recycled, it doesn’t matter. But think about it: this sets a bad precedent; it not only wastes electricity but also dulls people’s minds.
Is any of this gas recovered and used as fuel in the blast furnace boiler? How effective is it
Our company recycles the blow air for use in boilers, so there is no need for venting under normal circumstances
I agree with the view from floor 6; we don’t carry out any recycling and instead release it directly into the environment. Any leakage in the filler must be dealt with promptly.
Boilers that provide direct triple-gas supply with an upward air injection system are actually quite good; the leakage rate of the packing in such boilers is already low. If the gas is to be recycled to the compressor, it will be necessary to handle oil, water, and ammonia, which requires additional investment in equipment. Strictly control the temperature at the end of the filler; if it exceeds 65°C, stop the machine, reverse its operation to replace the filler. Meanwhile, pressure relief and air release can also facilitate the recovery of the tri-gas for combustion. It is particularly important to strengthen communication between different stations when supplying gas, and the pressure release rate should not be too fast to prevent overpressure.