[Q&A Question 113] 2017.04.23
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【Q&A Question 113】April 23, 2017: What are the general safety measures for hydrogenation plants? The reference answers will be visible after responding; points are awarded by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) 1 Emergency pressure relief and venting system ； 2. Interlock self-protection system; 3. Fixed combustible gas and hydrogen sulfide detection alarm; 4. Fire alarm system ； 5. Rotating fire monitor; 6. Dual-power supply system. 7. dcsups power supply, etc. Scoring criteria: Incorrect answers earn 2 wealth points; *incomplete* answers yield 3–8 points. Correct answers with a detailed explanation grant 10 wealth points, while correct answers with insufficient supplementary *answers* earn 15–20 wealth points. Please score according to these criteria. 2017 Q&A Summary Thread (updates starting now) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates starting now) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html Petrochemical Sector – “Creative Ideas for Energy Saving” campaign (sponsors sought; highest returns ever) http://bbs.hcbbs.com/thread-1666758-1-1.html Sponsors are being sought for this campaign; those interested can contact the event organizer. Petrochemical deep processing edition – the event to share pictures of chemical equipment has started! A vast amount of wealth, as well as HChuan coins, are waiting for you to claim them. http://bbs.hcbbs.com/thread-1760733-1-1.html Notice regarding the collection of chemical engineering technical materials in the \"Petroleum and Chemicals Section\": http://bbs.hcbbs.com/thread-1614796-1-1.html (Source: HChuan Chemical Forum)
Strengthen inspections! Ensure proper protection against hydrogen sulfide, keep records of inspections and tests for all moving equipment, pay attention to wearing personal protective equipment, maintain clear safety passages, seal drain openings, implement safety measures, and have fire extinguishers and other firefighting equipment available! Fire and explosion protection, alarms, safety signs, combustible and toxic gas detectors!
1 Emergency pressure relief and venting system； 2. Interlock self-protection system; 3. Fixed combustible gas and hydrogen sulfide detection alarm; 4. Fire alarm system ； 5. Rotating fire monitor; 6. Dual-power supply system. 7. dcsups power supply, etc
Fire steam loop, emergency pressure relief interlock, cold hydrogen
Generally, it is equipped with various interlocking devices, safety valves, high/low level alarms, emergency shutdown systems, manual emergency stop functions, fire alarms, detectors for toxic and flammable gases, fire suppression steam, fire extinguishing water, and so on
1. Closely monitor the temperature changes in the reactor; when an abnormal temperature rise occurs, every effort should be made to control the temperature using various methods. The safety interlock devices should be calibrated regularly, especially the emergency venting systems at 0.7 MPa/min and 2.1 MPa/min. 2. The safety accessories of the high-pressure separator must be complete, functional, and in good condition; they should be properly maintained and accurately calibrated. The glass level gauge must be clear and provide accurate readings; when the reading indicated by the level gauge instrument does not match that of the glass level gauge, it needs to be calibrated properly. To prevent liquid from being carried in the circulating hydrogen or high pressure from leaking into low pressure, its liquid level must be strictly controlled within the range of 50–60%. 3. It is necessary to regularly check whether the lubricating oil, seal oil, and cooling water systems of the circulating hydrogen compressor are functioning properly, as well as to ensure that all indicator instruments and automatic protection interlock devices are operating correctly. All operating parameters are strictly controlled within the process specifications ； Control the pressure and temperature of medium-pressure steam to ensure a proper supply of steam ； Prevent liquid from being carried in the recycled hydrogen. Strictly monitor and control the liquid level in the high-pressure separator. 4. The hydrogenation reaction catalyst is in an oxidized state before operation; an oxidized catalyst does not possess hydrogenation activity, therefore the catalyst needs to be sulfided. Special attention should be paid to the issue of hydrogen sulfide poisoning. The passivator is anhydrous liquid ammonia. When passivating hydrocracking catalysts, care should be taken to maintain a hydrogen sulfide concentration in the system of not less than 0.05%.
Chain connections, self-protection mechanisms, safety valves, emergency shut-off valves, bypass lines, low-power devices, pressure relief valves, etc.; machine pumps generally come with backups
1. Anti-static work clothes 2. Safety helmet 3. Explosion-proof wrench 4. Explosion-proof walkie-talkie 5. Explosion-proof flashlight 6. Portable alarm 7. Emergency response plan 8. Fire monitor, fire extinguisher cabinet, fire extinguishers 9. Air respirator 10. First aid kit 11. Eye washer 12. Emergency pressure relief system 13. Team safety meeting