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Explosion-proof ways for the hazardous substances
Author:Fabor Time:2019-03-19
          1. Basic measures: 1 Control combustibles: storehouses with fire and explosive substances, use fire-resistant buildings to prevent flame spread; reduce the concentration of combustible gases, vapors and dust in the reservoir area so that it does not exceed the maximum allowable concentration; All items that can interact with each other are stored separately; 2 Isolate the air: Insulate the air and store some chemically flammable materials, such as sodium in kerosene, phosphorus in dry water, carbon disulfide in water, etc.; 3Clear the fire source, take isolation Fire source, temperature control, grounding, lightning protection, installation of explosion-proof lights, shielding of sunlight, etc., to prevent flammable materials from catching fire or increasing temperature and causing fire.
2, open fire control: control overhaul or fire on the construction site, including open flame, impact friction, spontaneous combustion, electric spark, static spark, etc.; use of open flame in the reservoir area where there is fire or explosion hazard; For open fire operations such as gas welding, the fire permit should be handled; the flammable and combustible materials in the hot fire area should be removed; and fire-fighting equipment should be arranged. The construction workers must be certified to work.
3, friction and impact control: in the auxiliary facilities, pumps, maintain good lubrication, timely removal of attached flammable dirt; when transporting metal containers containing flammable gases, flammable liquids, prevent each other from colliding, can not throw, In order to avoid fires and explosions caused by sparks or bursting of containers, in and out personnel cannot wear shoes with nails. When loading and unloading and handling, it is lightly loaded and unloaded, anti-vibration, impact friction, heavy pressure and dumping.
4, self-ignition heat control: oil rag, oil cotton yarn and other easy to spontaneous combustion caused by fire, should be placed in a metal container, placed in a safe zone and cleaned up in time.
5. EDM control: The main use of the reservoir area is low-voltage electrical equipment, which often produces short-term arc discharge and weak sparks on the joints. It poses a danger to flammable gases, flammable liquid vapors, explosive dusts, etc., which require low ignition energy. Therefore, electrical equipment and wiring should be selected for explosion-proof type.
6. Static spark control: The most serious hazard of static electricity is the burning and explosion of combustible materials. It is especially serious for flammable gases or steam that require less ignition energy. In places with gasoline, benzene, hydrogen, etc., special attention should be paid to electrostatic hazards. Anti-static overalls should be used. The flow rate should be controlled during pipeline transportation. Bulk chemical tank trucks should have reliable electrostatic grounding parts and monitor and alarm the electrostatic grounding resistance. The whole system should suppress static electricity generation or quickly discharge static electricity.
7. Other fire source control: avoid direct sunlight in summer and configure corresponding cooling measures; indoor warehouse avoids high-power lighting for long-time baking, using cold light source; fireworks are strictly prohibited in the library area; use of tools that may cause sparks is prohibited; use is strictly prohibited Not an explosion-proof mobile phone.
8. Prevent the expansion of flames and explosion waves: The function of the fire-stopping device is to prevent the flame from entering the equipment, the container, the pipeline, or to prevent the flame from expanding in the equipment and the pipeline. The commonly used safety water seal (196) flame arrester, single To the valve. Transportation vehicles entering the flammable and explosive reservoir area shall be inspected by “three levies” and equipped with fire hoods and small fireproof equipment. For pressurized storage facilities, the pressure relief device is an important safety device for fire and explosion protection, including safety valves and rupture discs, as well as breathing and venting tubes.
9. When storing unstable olefins and diolefins, measures should be taken to prevent self-polymerization, because the self-polymerization process will release heat and increase the risk of fire and explosion. Indicator devices such as pressure gauges (liquefied gas storage, etc.), thermometers, level gauges, and high-level alarms (flammable liquid storage tanks) can be used for periodic inspection or calibration and verification.
10. In addition, lightning protection and anti-static devices should be installed in the irrigation area and tested once a year.
11. Emergency preparation: install automatic gas-fired monitoring system, fire alarm device and fire-fighting sprinkler system in key parts prone to fire and explosion (since liquid chemicals are mostly lighter than water, fire extinguishing will lead to an increase in fire range), regular maintenance Or test, calibration, equipped rescue equipment should have an explosion-proof function. Develop emergency plans for different storage substances and storage conditions.
12. If you encounter a fire caused by a dangerous chemical, the equipment used will have strong selectivity and cannot be recklessly acted upon. Different types of fuel-saving equipment should be selected for chemicals with different characteristics, which should be clarified in the emergency plan. Fire fighting of hazardous chemicals should be carried out by a professional fire brigade.

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