Design issues for safety measures of liquid chlorine storage tanks
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This post was last edited by sunjl1981 on 2013-1-6 at 21:11. The design institute where I work is working on a project in Shandong Province, and I would like to ask whether there are any safety regulations in Shandong Province regarding the use of water mist to absorb chlorine gas that leaks out. Are there any other relevant standards or regulations available? Thank you. ， ， -
That’s a pretty innovative idea. What does a mist generator look like? It might be necessary to add an explosion-proof fog lamp as well, to facilitate emergency repairs.
We use an alkaline spray system; it’s best never to use it
It is actually the alkali spray system on the liquid chlorine storage tank. It requires the installation of an alkali tank and an alkali pump near the storage tank, as well as nozzles at every valve, flange, and other part of the tank that may leak, so that the alkali pump can be activated to spray alkali solution and absorb chlorine in the event of a leak.
If this system can’t be used, it’s better for this company to close down early. This entire system is actually meant for people in security departments.
This is indeed a safety measure, and we have also decided to use alkaline spray for this purpose. However, we heard that there are requirements regarding water mist absorption in Shandong; we were wondering if the colleagues there could provide some information on the local regulatory requirements
Is it mist absorption? It’s not about using a water mist wall made from fire-fighting water sheets to prevent the leakage area from expanding
The Technical Specifications for Safe Production of Chlor-alkali Products in Shandong Province, a local safety regulation document, is excellent and highly detailed; it serves as a model for safety practices in China’s chlor-alkali industry. Safety requirements for storage tanks: ① For storage tanks with a capacity of 1 ton or more, the settlement of their foundations should be measured annually. ②When storage tanks are installed outdoors, they should be equipped with a ceiling made of non-combustible materials or thermal insulation measures. ③It is strictly prohibited to store flammable and combustible materials within 20 meters of the storage tank. ④The storage tank area should be equipped with appropriate safety signs in accordance with the requirements for major hazard sources. ⑤For large-capacity liquid chlorine storage tanks, the liquid chlorine outlet piping must be equipped with flexible connections or spring-mounted supports to prevent installation stresses caused by foundation settlement. ⑥Storage tanks with a capacity of over 5 tons should be equipped with an alkali spray system, and a negative pressure suction system for chlorine should be installed near the tanks. Safety Regulations for Chlorine (GB11984-89) 6.4.8 Safety requirements for storage tanks: 6.4.8.1 For storage tanks with a storage capacity of 1 ton or more, the settlement of their foundations should be measured annually. 6.4.8.2 When storage tanks are installed outdoors, they shall be equipped with a ceiling made of non-combustible materials or thermal insulation materials. 6.4.8.3 It is strictly prohibited to store flammable and combustible materials within 20 meters of the storage tank. 6.4.8.4 The storage volume in the storage tank shall not exceed 80% of the tank’s capacity. 6.4.8.5 Safety signs shall be installed within the storage tank area.
8# sjx seems to indicate that a mist wall is required in order to absorb the chlorine gas that leaks out, thereby preventing it from spreading outward
This post was last edited by limingshuguang on 2011-4-10 at 17:34. We have mist walls made of fire-fighting fabric, as well as an emergency absorption system that uses large pipes to create negative pressure and alkaline solutions for absorption. However, it seems to be more of a showpiece project with no real practical value; in the event of a leak, I think it’s better to quickly transfer the contents to another container! !