Leakage treatment of hazardous chemicals
March 29, 2024
Leakage of hazardous chemicals, prone to poisoning or conversion to fire and explosion accidents. Therefore, the leakage treatment should be timely and appropriate to avoid the occurrence of major accidents.
To successfully control a chemical leak, it must be planned in advance and have a good understanding of the chemical and reaction characteristics of the chemical.
Leakage accident control is generally divided into two parts: leakage source control and leakage disposal.
Leakage Handling Precautions When entering the leak site for processing, the following items should be noted:
- Personnel entering the site must be equipped with the necessary personal protective equipment.
-- If the spilled chemicals are flammable and explosive, fire should be strictly prohibited. Extinguish any open flame and any other form of heat and fire to reduce the risk of fire and explosion;
-- It is strictly forbidden to act alone during emergency handling. There must be guardians, and if necessary, cover with water guns and water cannons.
-- It should be close to the scene from the upwind and the uphill slope. It is strictly forbidden to enter blindly.
Leak source control, if possible, eliminates further chemical diffusion by controlling spillage or leakage of chemicals. This can be done by:
-- By closing the relevant valve, stopping the operation or by taking changes to the process flow, material bypass line, local parking, circulation, load reduction operation, etc.
-- After the container leaks, measures should be taken to repair and block the crack to prevent further leakage of chemicals, which is critical for the entire emergency treatment. Successful suturing depends on several factors: the degree of danger near the leak, the size of the leak, the actual or potential pressure at the leak, and the nature of the leak.
After the leakage of the leakage is controlled, it is necessary to cover, contain, dilute and treat the leakage in time so that the leakage can be safely and reliably disposed to prevent the occurrence of secondary accidents. The main methods for disposal of spills on the ground are as follows:
If the chemical is a liquid, it will spread and spread when it leaks to the ground, making it difficult to collect and treat. For this purpose, the embankment needs to be intercepted or drained to a safe place. For this purpose, the embankment needs to be intercepted or drained to a safe place. When liquid leakage occurs in the tank area, the rainwater valve should be closed in time to prevent the material from flowing out along the open channel.
For liquid leakage, in order to reduce the evaporation rate of the material into the atmosphere, the leaked material may be covered with foam or other covering articles to form a coating layer on the surface thereof to inhibit evaporation. Or use low temperature cooling to reduce the evaporation of the spill.
In order to reduce air pollution, water spray or fire hose is usually used to spray misty water into the cloud of harmful vapors, which accelerates the diffusion of gas to high altitude and spreads it in a safe place. When using this technology, a large amount of contaminated water will be generated, so the sewage discharge system should be dredged. For combustible materials, it is also possible to apply a large amount of water vapor or nitrogen to the site to destroy the combustion conditions.
For large liquid leaks, the diaphragm pump can be used to pump the leaked material into the container or the tank truck; when the leakage is small, it can be neutralized by sand, adsorbent materials, neutralizing materials, etc. Or use a curing method to treat the spill.
The collected spills are transported to a waste disposal site for disposal. Rinse the remaining small amount of material with fire water and drain the flushing water into the oily sewage system.
Wuxi Volksky New Materials Co.,Ltd.
