What are the main operational issues during the startup and shutdown processes of a sulfur recovery unit?
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This post was last edited by liaifeng on 2018-8-18 10:32. What are the main operational issues that need to be considered during the startup and shutdown of sulfur recovery units? Only in this way can green startup and shutdown be achieved, that is: during the startup or shutdown process, the emissions from the incinerator exhaust can meet the specified standards.
Parking: 1 Catalyst thermal soak to remove the liquid flow from the catalyst. 2 Catalyst sulfate reduction, enabling the sulfate reduction of the catalyst. 3. Sulfur removal by gas blowing; pay attention to the sludge discharge from each trap. 4. Purge the system and cool it down.
The so-called green aspect exists only in theory; safety comes first.
Just follow the operating procedures.
It is also necessary to gradually switch from acidic gas to fuel gas in order to maintain the temperature of the combustion furnace. The temperature of the Claus reactor must be maintained for 48 hours; the catalyst should be passivated, and the system should be purged with nitrogen for protection.
Start-up: 1: When the system is heated up, this situation does not occur since fuel gas is being burned. 2: After the system has been heated up and the temperature rise in the reactor stabilizes, pre-heat the solvent regeneration system.
3: Following the introduction of sour gas, adjust the air supply according to operating procedures; then put the hydrogenation reactor and absorption tower into service. If an alkali washing tower is present, also put it into service. 4: Normal operation will not result in sulfur dioxide levels exceeding the limit. Shutdown: 1: When becoming familiar with the entire system. 2: Based on the gas flow rate and valve position prior to startup, sample and analyze the gas components to calculate the equivalent combustion value. 3: Under the condition of equivalent air supply, maintain a slight excess of oxygen, with this excess not exceeding 0.5% of the total oxygen amount; sample and analyze at regular intervals and in specific locations before the first cooling stage
3: Following the introduction of sour gas, adjust the air supply according to operating procedures; then put the hydrogenation reactor and absorption tower into service. If an alkali washing tower is present, also put it into service. 4: Normal operation will not result in sulfur dioxide levels exceeding the limit. Shutdown: 1: When becoming familiar with the entire system. 2: Based on the gas flow rate and valve position prior to startup, sample and analyze the gas components to calculate the equivalent combustion value. 3: Under the condition of equivalent air supply, maintain a slight excess of oxygen, with this excess not exceeding 0.5% of the total oxygen amount; sample and analyze at regular intervals and in specific locations before the first cooling stage