Purification Technology Edition Daily Question (Short Answer) [2018-2-2]
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How to handle a methanol cycle interruption? a. Immediately cut off the purge gas in the out-of-bounds area, and at the same time open the vent valve to discharge the process gas to the flare. b. Increase the liquid level controller settings for each tower to maintain the liquid level in them. c. Close the acidic gas boundary zone isolation valve to vent these gases to the flare. Maintain pressure in the exhaust gas system. d. Close the gate valve on the feed gas pipeline to the low-temperature methanol washing unit to stop feeding gas. e. Stop spraying methanol ； Stop gas supply and remove N2. f. If necessary, close the isolation valve located before the methanol level control valve that leads from the high-pressure equipment to the low-pressure equipment, to prevent high pressure from leaking into the low-pressure equipment. g. Once the methanol cycle is restored, the purified gas can be vented directly through the vent valve, and it should be sent to the methanol synthesis process only after the parameters of the purified gas meet the required standards.
a. Immediately cut off the purge gas in the out-of-bounds area, and at the same time open the vent valve to discharge the process gas to the flare. b. Increase the liquid level controller settings for each tower to maintain the liquid level in them. c. Close the acidic gas boundary zone isolation valve to vent these gases to the flare. Maintain pressure in the exhaust gas system. d. Close the gate valve on the feed gas pipeline to the low-temperature methanol washing unit to stop feeding gas. e. Stop spraying methanol ； Stop gas supply and remove N2. f. If necessary, close the isolation valve located before the methanol level control valve that leads from the high-pressure equipment to the low-pressure equipment, to prevent high pressure from leaking into the low-pressure equipment. g. Once the methanol cycle is restored, the purified gas can be vented directly through the vent valve, and it should be sent to the methanol synthesis process only after the parameters of the purified gas meet the required standards.
a. Immediately cut off the purified gas flowing to the out-of-bounds area, and at the same time open the vent valve to release the process gas to the flare. b. Increase the liquid level controller settings for each tower to maintain the liquid level in them. c. Close the acidic gas boundary zone isolation valve to vent these gases to the flare. Maintain pressure in the exhaust gas system. d. Close the gate valve on the feed gas pipeline to the low-temperature methanol washing unit to stop feeding gas. e. Stop spraying methanol ； Stop gas supply and remove N2. f. If necessary, close the isolation valve located before the methanol level control valve that leads from the high-pressure equipment to the low-pressure equipment, to prevent high pressure from leaking into the low-pressure equipment. g. Once the methanol cycle is restored, the purified gas can be vented directly through the vent valve, and it should be sent to the methanol synthesis process only after the parameters of the purified gas meet the required standards.
Answer: a. Immediately cut off the purge gas in the out-of-bounds area, and at the same time open the vent valve to vent the process gas to the flare. b. Increase the liquid level controller settings for each tower to maintain the liquid level in them. c. Close the acidic gas boundary zone isolation valve to vent these gases to the flare. Maintain pressure in the exhaust gas system. d. Close the gate valve on the feed gas pipeline to the low-temperature methanol washing unit to stop feeding gas. e. Stop spraying methanol ； Stop gas supply and remove N2. f. If necessary, close the isolation valve located before the methanol level control valve that leads from the high-pressure equipment to the low-pressure equipment, to prevent high pressure from leaking into the low-pressure equipment. g. Once the methanol cycle is restored, the purified gas can be vented directly through the vent valve, and it should be sent to the methanol synthesis process only after the parameters of the purified gas meet the required standards.
a. Immediately cut off the purge gas in the out-of-bounds area, and at the same time open the vent valve to discharge the process gas to the flare. b. Increase the liquid level controller settings for each tower to maintain the liquid level in them. c. Close the acidic gas boundary zone isolation valve to vent these gases to the flare. Maintain pressure in the exhaust gas system. d. Close the gate valve on the feed gas pipeline to the low-temperature methanol washing unit to stop feeding gas. e. Stop spraying methanol ； Stop gas supply and remove N2. f. If necessary, close the isolation valve located before the methanol level control valve that leads from the high-pressure equipment to the low-pressure equipment, to prevent high pressure from leaking into the low-pressure equipment. g. Once the methanol cycle is restored, the purified gas can be vented directly through the vent valve, and it should be sent to the methanol synthesis process only after the parameters of the purified gas meet the required standards.
a. Immediately cut off the purge gas in the out-of-bounds area, and at the same time open the vent valve to discharge the process gas to the flare. b. Increase the liquid level controller settings for each tower to maintain the liquid level in them. c. Close the acidic gas boundary zone isolation valve to vent these gases to the flare. Maintain pressure in the exhaust system. d. Close the gate valve on the raw material pipeline leading to the low-temperature methanol washing unit
a. Immediately cut off the purge gas in the out-of-bounds area, and at the same time open the vent valve to discharge the process gas to the flare. b. Increase the liquid level controller settings for each tower to maintain the liquid level in them. c. Close the acidic gas boundary zone isolation valve to vent these gases to the flare. Maintain pressure in the exhaust gas system. d. Close the gate valve on the feed gas pipeline to the low-temperature methanol washing unit to stop feeding gas. e. Stop spraying methanol ； Stop gas supply and remove N2. f. If necessary, close the isolation valve located before the methanol level control valve that leads from the high-pressure equipment to the low-pressure equipment, to prevent high pressure from leaking into the low-pressure equipment. g. Once the methanol cycle is restored, the purified gas can be vented directly through the vent valve, and it should be sent to the methanol synthesis process only after the parameters of the purified gas meet the required standards.
a. Immediately cut off the purge gas in the out-of-bounds area, and at the same time open the vent valve to discharge the process gas to the flare. b. Increase the liquid level controller settings for each tower to maintain the liquid level in them. c. Close the acidic gas boundary zone isolation valve to vent these gases to the flare. Maintain pressure in the exhaust gas system. d. Close the gate valve on the feed gas pipeline to the low-temperature methanol washing unit to stop feeding gas. e. Stop spraying methanol ； Stop gas supply and remove N2. f. If necessary, close the isolation valve located before the methanol level control valve that leads from the high-pressure equipment to the low-pressure equipment, to prevent high pressure from leaking into the low-pressure equipment. g. Once the methanol cycle is restored, the purified gas can be vented directly through the vent valve, and it should be sent to the methanol synthesis process only after the parameters of the purified gas meet the required standards.
a. Immediately cut off the purge gas in the out-of-bounds area, and at the same time open the vent valve to discharge the process gas to the flare. b. Increase the liquid level controller settings for each tower to maintain the liquid level in them. c. Close the acidic gas boundary zone isolation valve to vent these gases to the flare. Maintain pressure in the exhaust gas system. d. Close the gate valve on the feed gas pipeline to the low-temperature methanol washing unit to stop feeding gas. e. Stop spraying methanol ； Stop gas supply and remove N2. f. If necessary, close the isolation valve located before the methanol level control valve that leads from the high-pressure equipment to the low-pressure equipment, to prevent high pressure from leaking into the low-pressure equipment. g. Once the methanol cycle is restored, the purified gas can be vented directly through the vent valve, and it should be sent to the methanol synthesis process only after the parameters of the purified gas meet the required standards.
a. Immediately cut off the purge gas in the out-of-bounds area, and at the same time open the vent valve to discharge the process gas to the flare. b. Increase the liquid level controller settings for each tower to maintain the liquid level in them. c. Close the acidic gas boundary zone isolation valve to vent these gases to the flare. Maintain pressure in the exhaust gas system. d. Close the gate valve on the feed gas pipeline to the low-temperature methanol washing unit to stop feeding gas. e. Stop spraying methanol ； Stop gas supply and remove N2. f. If necessary, close the isolation valve located before the methanol level control valve that leads from the high-pressure equipment to the low-pressure equipment, to prevent high pressure from leaking into the low-pressure equipment. g. Once the methanol cycle is restarted, the purified gas can be vented directly through the vent valve; it should only be fed into the methanol synthesis process after the parameters of the purified gas have been confirmed to be satisfactory
This post was last edited by 463025763 on 2018-2-2 at 11:59: 1. Immediately cut off the purge gas in the out-of-bound area, and at the same time open the vent valve to release the process gas to the flare. 2. Increase the liquid level controller settings for each tower to maintain the liquid level in them. 3. Close the acidic gas boundary zone isolation valve to vent these gases to the flare. Maintain pressure in the exhaust system at 4. Close the gate valve on the feed gas pipeline to the low-temperature methanol washing unit to stop feeding gas. 5. Stop spraying methanol ； Stop gas supply and remove N2. 6. If necessary, close the isolation valve located before the methanol level control valve that leads from the high-pressure equipment to the low-pressure equipment, to prevent high pressure from leaking into the low-pressure equipment. 7. Once the methanol cycle is restarted, the purified gas can be vented directly through the vent valve, and it should be sent to the methanol synthesis process only after the parameters of the purified gas meet the required standards.