Purification Technology Edition: One Question per Week (Second Week of August 2017)
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This post was last edited by hai8487 on 2017-8-31 11:54. In what situations are filter-type gas masks used? What are the principles to follow when using it? Answer: Toxicity concentration ≤ 2%, oxygen content ≥ 18% ； Wear it first, then proceed: Purification technology version for the coal chemical industry – 2017’s “My Technical Upgrades” competition in the coal chemical sector (with generous prizes). http://bbs.hcbbs.com/thread-1786290-1-1.html Registration for chemical engineers: Experience-sharing event titled “Learning from Others’ Experiences”. http://bbs.hcbbs.com/thread-1808158-1-1.html
Self-priming filter gas masks (or gas respirators) cannot be used when the gas concentration exceeds the specified range or when the oxygen content in the air is below 18%. Direct-type gas masks are specified to withstand a gas concentration of over 0.5%; in such cases, a ducted type should be used instead.
Toxin concentration ≤2%, oxygen content ≥18%； Put on the later ones first
The gas concentration should be less than 2%, and the oxygen level should be above 18%. Check these values before use, put on the appropriate equipment, and then enter the toxic area
It is used in environments where the toxin content is ≤2% and the oxygen content is ≥18%. The principle to follow when using it is to put on the protection gear first before entering such an environment.
I. The oxygen content in the air must not be lower than 19.5%; otherwise, there will be a lack of oxygen； II. The concentration of toxic gases in the air must not exceed the maximum concentration that can be protected by a filtering gas mask ； III. Filter-type gas masks are not recommended for use in special environments such as high or low temperatures.
It is used in environments where the toxin content is ≤2% and the oxygen content is ≥18%. The principle to follow when using it is to put on the protection gear first before entering such an environment.
Before using a gas mask, it is necessary to determine the nature and concentration of the toxins present in the working environment, as well as the oxygen level in the air. Using the mask is strictly prohibited until these conditions of the working environment are known. Self-priming filter respirators (or gas masks) cannot be used when the gas concentration exceeds the specified range or when the oxygen content in the air is below 18%. Direct-type gas masks are specified to withstand a gas concentration of over 0.5%; in such cases, a ducted type should be used instead.
In an environment with an oxygen level of 18, the principle to follow is to put on the equipment first before entering
Answer: Toxicity concentration ≤ 2%, oxygen content ≥ 18%； Put on the later ones first