Practical Exercise on Purification Technology Version [050]
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Under what circumstances does a desulfurization and decarbonization system need to be shut down urgently? Answer: ① During the production process, if a control parameter exceeds its specified range or there is a power failure or other malfunction, the entire system will automatically shut down under the control of the DCS. ②For the following faults, the operator must initiate a manual shutdown; once the system is stopped, it should be treated as an emergency shutdown: system explosion or fire, severe leaks, loss of instrument air, loss of boiler feed water, faults at certain points in the system that pose a threat to the safety of operators and equipment, sudden failure or black screen of the DCS system, situations where the operator loses visibility, faults upstream or downstream that pose a serious threat to the safe operation of the system – all such situations shall be handled as emergency shutdowns. Coalification Region Purification Technology Edition – 2017 Coal Chemical Industry “My Technical Upgrades” Contest (Large prizes available) http://bbs.hcbbs.com/thread-1786290-1-1.html Registration for Chemical Engineers – Experience Sharing Event “Learning from Others’ Experiences” http://bbs.hcbbs.com/thread-1808158-1-1.html
①①During the production process, if a control parameter exceeds its specified range or there is a power failure or other malfunction, the entire system will automatically shut down under the control of the DCS. ②For the following faults, the operator must initiate a manual shutdown; once the system is shut down, it should be treated as an emergency stop situation: system explosion or fire, severe leaks, loss of instrument air, loss of boiler feed water, failures at certain points in the system that pose a threat to the safety of operators and equipment, sudden failure of the DCS system with a black screen, situations where the operator loses visibility, and faults upstream or downstream that pose a serious threat to the safe operation of the system. All such situations should be handled as emergency stops.
①During the production process, if a control parameter exceeds its specified range or there is a power failure or other malfunction, the entire system will automatically shut down under the control of the DCS. ②For the following faults, the operator must initiate a manual shutdown; once the system is shut down, it should be treated as an emergency stop situation: system explosion or fire, severe leaks, loss of instrument air, loss of boiler feed water, failures at certain points in the system that pose a threat to the safety of operators and equipment, sudden failure of the DCS system with a black screen, situations where the operator loses visibility, and faults upstream or downstream that pose a serious threat to the safe operation of the system. All such situations should be handled as emergency stops.
①During the production process, if a control parameter exceeds its specified range or there is a power failure or other malfunction, the entire system will automatically shut down under the control of the DCS. ②For the following faults, the operator must initiate a manual shutdown; once the system is shut down, it should be treated as an emergency stop situation: system explosion or fire, severe leaks, loss of instrument air, loss of boiler feedwater, failures at certain points in the system that pose a threat to the safety of operators and equipment, sudden failure of the DCS system with a black screen, situations where the operator loses visibility, and failures upstream or downstream that pose a serious threat to the safe operation of the system. All such situations should be handled as emergency stops
: ① During the production process, if a control parameter exceeds its specified range or there is a power failure or other malfunction, the entire system will automatically shut down under the control of the DCS. ②For the following faults, the operator must initiate a manual shutdown; once the system is shut down, it should be treated as an emergency stop situation: system explosion or fire, severe leaks, loss of instrument air, loss of boiler feed water, failures at certain points in the system that pose a threat to the safety of operators and equipment, sudden failure of the DCS system with a black screen, situations where the operator loses visibility, and faults upstream or downstream that pose a serious threat to the safe operation of the system. All such situations should be handled as emergency stops.
: ① During the production process, if a control parameter exceeds its specified range or there is a power failure or other malfunction, the entire system will automatically shut down under the control of the DCS. ②For the following faults, the operator must initiate a manual shutdown; once the system is shut down, it should be treated as an emergency stop situation: system explosion or fire, severe leaks, loss of instrument air, loss of boiler feed water, failures at certain points in the system that pose a threat to the safety of operators and equipment, sudden failure of the DCS system with a black screen, situations where the operator loses visibility, and faults upstream or downstream that pose a serious threat to the safe operation of the system. All such situations should be handled as emergency stops.
①During the production process, if a control parameter exceeds its specified range or there is a power failure or other malfunction, the entire system will automatically shut down under the control of the DCS. ②For the following faults, the operator must initiate a manual shutdown; once the system is shut down, it should be treated as an emergency stop situation: system explosion or fire, severe leaks, loss of instrument air, loss of boiler feed water, failures at certain points in the system that pose a threat to the safety of operators and equipment, sudden failure of the DCS system with a black screen, situations where the operator loses visibility, and failures upstream or downstream that pose a serious threat to the safe operation of the system. All such situations should be handled as emergency stops.
①During the production process, if a control parameter exceeds its specified range or there is a power failure or other malfunction, the entire system will automatically shut down under the control of the DCS. ②For the following faults, the operator must initiate a manual shutdown; once the system is shut down, it should be treated as an emergency stop situation: system explosion or fire, severe leaks, loss of instrument air, loss of boiler feed water, failures at certain points in the system that pose a threat to the safety of operators and equipment, sudden failure of the DCS system with a black screen, situations where the operator loses visibility, and faults upstream or downstream that pose a serious threat to the safe operation of the system. All such situations should be handled as emergency stops.
Answer: ① During the production process, if a control parameter exceeds its specified range or there is a power failure or other malfunction, the entire system will automatically shut down under the control of the DCS. ②For the following faults, the operator must initiate a manual shutdown; once the system is shut down, it should be treated as an emergency stop situation: system explosion or fire, severe leaks, loss of instrument air, loss of boiler feed water, failures at certain points in the system that pose a threat to the safety of operators and equipment, sudden failure of the DCS system with a black screen, situations where the operator loses visibility, and faults upstream or downstream that pose a serious threat to the safe operation of the system. All such situations should be handled as emergency stops.
: ① During the production process, if a control parameter exceeds its specified range or there is a power failure or other malfunction, the entire system will automatically shut down under the control of the DCS. ②For the following faults, the operator must initiate a manual shutdown; once the system is shut down, it should be treated as an emergency stop situation: system explosion or fire, severe leaks, loss of instrument air, loss of boiler feedwater, failures at certain points in the system that pose a threat to the safety of operators and equipment, sudden failure of the DCS system with a black screen, situations where the operator loses visibility, and failures upstream or downstream that pose a serious threat to the safe operation of the system. All such situations should be handled as emergency stops
①During the production process, if a control parameter exceeds its specified range or if there is a power failure or other malfunction, the entire system will automatically shut down under the control of the DCS. ②For the following faults, the operator must initiate a manual shutdown; once the system is stopped, it should be treated as an emergency shutdown: system explosion or fire, severe leaks, loss of instrument air, loss of boiler feed water, faults at certain points in the system that pose a threat to the safety of operators and equipment, sudden failure or black screen of the DCS system, situations where the operator loses visibility, faults upstream or downstream that pose a serious threat to the safe operation of the system – all such situations shall be handled as emergency shutdowns.