Safety precautions for removing hydrogenation catalysts
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When the service life of the hydrogenation catalyst comes to an end, it needs to be replaced. Precautions should be taken during the removal of the old catalyst (note: without causing burning).
It is best to perform passivation treatment, cool down to below 40 degrees, and remove the agent under nitrogen protection. Prepare the cooling water
Be sure to take proper precautions to prevent the natural formation of iron sulfide
Precautions: 1. Strictly prevent the formation of nickel carbonyl； 2. Prevent the spontaneous combustion of ferrous sulfide ； 3. Preventing hydrogen sulfide poisoning ； Main protective measures: 1. The bed temperature must be below 40°C, and it should be reduced to the lowest possible temperature ； 2. Remove the agent in a nitrogen atmosphere to maintain a slight positive nitrogen pressure in the catalyst bed ； 3. Personnel standing near the agent discharge port must be equipped with appropriate protective gear, including gas masks.
Operators should wear dust masks; nickel is carcinogenic
Cooling and nitrogen protection – what does it mean to have cooling water ready? Does it mean soaking the catalyst that has been unloaded in water? This is the rhythm without a catalyst. . . Moreover, once ferrous sulfide catches fire on its own, introducing steam and nitrogen is the best approach; using direct water flow doesn’t help much either
1. When removing the hydrogenation catalyst, it is necessary to control the temperature and oxygen level; the temperature should not exceed 40, and the oxygen level should not be higher than 3%. 2. A suction pump should be used for removing the catalyst, as it may catch fire in the pipes. It is recommended to have cooling water ready at the outlet to prevent smoking caused by spontaneous combustion. 3. For removing the catalyst, one should turn to Jiangsu Tianpeng
Regarding water, it’s important to be clear: it poses a hidden risk; if an active catalyst comes into contact with water, serious problems can occur
Use water under the condition that the catalyst is no longer regenerated