【Q&A Question 073】March 14, 2017
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This post was last edited by 955559 on 2017-7-21 22:18. [Q&A Question No. 073] What are the regulations regarding work with toxic and harmful gases and liquids as of 2017.03.14? 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.) ) When working with toxic and harmful gases and liquids, it is necessary to wear a suitable gas mask ； There is a dedicated person to supervise ； Work from a position with an advantage. 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 Third Phase of Haichuan’s Outstanding Management Members Selection Contest http://bbs.hcbbs.com/thread-1655902-1-1.html (Source: Haichuan Chemicals Forum)
When working with toxic and harmful gases and liquids, it is necessary to: wear appropriate gas masks; have a supervisor present and work in a location upwind.
1. Strengthen safety management by prohibiting unauthorized personnel from entering the workplace, in order to prevent them from accidentally entering toxic and hazardous areas. 2. Workers shall use personal protective equipment properly and strictly comply with the safety management regulations for working in areas with toxic and harmful gases or oxygen-deficient conditions. 3. In areas where toxic and harmful gases are present or where there is a risk of oxygen deficiency, it is necessary to continuously monitor the levels of such gases, and take appropriate measures at all times to prevent any potential hazards to the workers. 4. The following persons shall not work in areas with toxic and harmful gases or in environments prone to oxygen deficiency: (1) Women who are menstruating, pregnant, or breastfeeding ； (2) Those with severe physical disabilities such as deafness, muteness, mental retardation, or idiocy ； (3) Those suffering from severe chronic diseases such as high myopia, epilepsy, hypertension, allergic tracheitis, asthma, heart disease, etc ； (4) Those with untreated traumatic wounds. The number of personnel should be accurately counted before they enter areas prone to toxic and harmful gases and oxygen deficiency, as well as when they leave such areas. 5. It is necessary to inform the workers about the hazards present in the workplace ； And establish safety plans for training all employees ； 6. If necessary, relevant personnel should work with proper credentials
Workers should use personal protective equipment properly and strictly abide by the safety management regulations for working in areas with toxic and harmful gases or oxygen deficiency. A work permit system is implemented for operations in areas with toxic and harmful gases and oxygen deficiency hazards. In areas where toxic and harmful gases are present or where there is a risk of oxygen deficiency, it is necessary to continuously monitor the levels of such gases, and take appropriate measures at all times to prevent any potential hazards to the workers. When working in areas with toxic and harmful gases or low oxygen levels, warning signs and isolation barriers should be installed; warning lights should be used during night-time work in outdoor areas. The following persons are not permitted to work in areas with toxic and harmful gases or in environments with oxygen deficiency: (1) Women who are menstruating, pregnant, or breastfeeding ； (2) Those with severe physical disabilities such as deafness, muteness, mental retardation, or idiocy ； (3) Those suffering from severe chronic diseases such as high myopia, epilepsy, hypertension, allergic tracheitis, asthma, heart disease, etc ； (4) Those with untreated traumatic wounds. The number of personnel should be accurately counted before they enter areas prone to toxic and harmful gases and oxygen deficiency, as well as when they leave such areas.
Wear the proper protective equipment, stand upwind, ensure there are no welding or burning operations in the vicinity, have one person carry out the work while another acts as a supervisor
Appropriate gas masks must be worn； There is a dedicated person to supervise ； Work from a position with an advantage.
Take proper precautions to avoid poisoning
Personal protective equipment must be worn as required, and effective gas masks must be used depending on the nature of the toxins.
1. There must be a place where gas and liquid can come into full contact for interphase heat and mass transfer, namely the tray (or packing). 2. On each tray, both phases with an unbalanced composition – gas (rising vapor) and liquid (falling reflux) – must be present simultaneously. To ensure that there is rising vapor and oil on each tray in the distillation column, a heat source is required ； To enable downward reflux on the trays, external reflux must be introduced below the top of the tower and at each full extraction hopper, so as to create internal reflux on the other trays.
Personal alarm device, for special operations; wear chemical protective suit and respirator.