Frequent accidents of hazardous chemicals?

Global Coatings Network News:

Article 3 of the "Regulations on the Safety Management of Hazardous Chemicals" stipulates that hazardous chemicals refer to highly toxic chemicals and other chemicals that have toxic, corrosive, explosive, combustible, and combustion-supporting properties and are harmful to humans, facilities, and the environment.

At about 9 am on July 31, an explosion occurred in the front door of the tea-bo city in the south of Qingnian Road.
The preliminary analysis was caused by the leakage of the liquefied gas tank, causing 3 people to be injured.
After receiving the police, the emergency, fire, and public security departments immediately rushed to the scene for treatment, and sent the injured to the hospital for treatment in a timely manner.
There was no life threat to the injured.
The cause of the matter is under investigation.

Several passersby were injured in a deflagration in a hotel in Jilin City

At 7:20 on August 2, a restaurant on Jiefang North Road, Changyi District, Jilin City, Jilin Province deflagrated.
A number of pedestrians were scratched by glass shards.
The hotel’s door face was severely deformed, and nearby shops and vehicles were damaged.
Glass shards were scattered all over the place.

A warehouse explosion accident occurred in a chemical plant in Guangdong

At around 23:30 on August 6, a fire broke out in the finished product warehouse of Guangdong Guangkang Biochemical Technology Co.
, Ltd.
in Shakou Town, Yingde City, Qingyuan.
Qingyuan and the Yingde Emergency Management Bureau responded quickly and mobilized more than 100 firefighters and 20 Many fire trucks participated in the fire fighting, and the firefighters quickly cut off the fire road and contained the fire within the finished product warehouse.
After 8 hours of hard work, the open flame was extinguished at 7:30 in the morning of August 7th.
The fire caused no casualties, and the cause of the accident is under further investigation.

We can see that there were three deflagration incidents of hazardous chemicals on July 31 alone.
The lessons of the accidents are painful, so how can we prevent hazardous chemicals from exploding and other dangers? These ten major explosion-proof measures must be done!

1.
Basic measures

(1) Control of combustibles:

Storehouses containing flammable and explosive dangerous substances should adopt fire-resistant construction to prevent the spread of flames; reduce the concentration of combustible gas, vapor and dust in the storehouse so that they do not exceed the maximum allowable concentration; all items that can interact with each other in nature, Store separately.

(2) Isolate the air:

Some air storage isolated flammable chemical such as sodium present in the kerosene, the phosphorus present in the dry water disulfide, carbon water storage closed like.

(3) Eliminate the ignition source:

Eliminate the ignition source, take measures to isolate the ignition source, control temperature, grounding, lightning protection, install explosion-proof lights, block the sun, etc.
, to prevent combustibles from catching fire due to open flames or increased temperature.

2.
Open flame control

(1) Control the ignition sources at the maintenance or construction site, including open flames, impact friction, natural heating, electric sparks, static sparks, etc.
;

(2) It is forbidden to use open flames in storage areas with fire and explosion hazards;

(3) Due to special circumstances, electric, gas welding and other open fire operations are required, and a hot work permit shall be obtained;

(4) Clear flammable and combustible substances in hot areas; deploy fire-fighting equipment.
Fire construction personnel must hold a certificate to work.

3.
Friction and impact control

(1) During the operation of auxiliary facilities and pumps, maintain good lubrication and timely remove attached combustible dirt;

(2) When transporting metal containers containing flammable gases and flammable liquids, prevent them from colliding with each other and not toss them, so as to avoid sparks or bursting of the container and cause fire and explosion accidents.
Personnel entering and exiting must not wear nailed shoes.

(3) When loading, unloading, and handling, load and unload lightly to prevent vibration, impact, friction, heavy pressure and dumping.

4.
Spontaneous combustion control

Oil rags, oil cotton yarns, etc.
are easy to cause fires, so they should be put into metal containers, placed in a safe place and cleaned up in time.

5.
Electric spark control

Low-voltage electrical equipment is mainly used in the storage area, which often produces short-term arc discharges and weak sparks on the contacts, which poses dangers to combustible gases with low ignition energy, flammable liquid vapors, and explosive dust.
Therefore, electrical equipment and The wiring should choose explosion-proof type.

6.
Static spark control

The most serious static electricity can cause combustibles to burn and explode.
It is especially serious for combustible gases or vapors that require low ignition energy.
In places with gasoline, benzene , hydrogen, etc.
, special attention should be paid to static electricity hazards.
Persons entering and exiting should wear anti-static overalls and pipes.
The flow rate should be controlled during transportation, the bulk chemical tanker should have a reliable electrostatic grounding position and the electrostatic grounding resistance should be detected and alarmed.
The entire system should suppress the generation of static electricity or quickly discharge static electricity.

7.
Other fire source control

(1) Avoid direct sunlight and configure corresponding cooling measures;

(2) In the indoor warehouse, avoid long-time baking with high-power lighting, and use cold light sources;

(3) Fireworks are strictly prohibited in the reservoir area;

(4) It is forbidden to use transportation tools that may generate sparks;

(5) It is strictly forbidden to use non-explosion-proof mobile phones.

8.
Prevent the expansion of flames and explosion waves

(1) The function of the fire arrester is to prevent the flame from entering the equipment, container and pipeline, or to prevent the flame from expanding in the equipment and pipeline.
Common fire arresters include safety water seals, flame arresters and one-way valves.

(2) The transportation vehicles entering the flammable and explosive storage area should be inspected with "three certificates" and be equipped with fireproof covers and small fireproof equipment.

(3) For pressurized storage facilities, the pressure relief device is an important safety device for fire and explosion protection, including safety valves, rupture discs, and vent pipes.

9.
Other matters needing attention

(1) When storing unstable olefins and diolefins, measures should be taken to prevent self-polymerization, because the self-polymerization process will generate heat and increase the risk of fire and explosion.

(2) Indication devices can be used, such as pressure gauges (liquefied gas storage, etc.
), thermometers, level gauges and high level alarms (flammable liquid storage tanks ), etc.
, for regular inspection or calibration and verification.

(3) In addition, the tank area should also be equipped with lightning protection and anti-static devices, and the inspection should be conducted every six months.

10.
Emergency equipment

(1) Install flammable gas automatic monitoring system, fire alarm device and fire extinguishing sprinkler device in key parts prone to fire and explosion (because liquid chemicals are mostly lighter than water, extinguishing with water will lead to the expansion of the fire range), and regular maintenance or testing , Calibration, rescue equipment equipped should have explosion-proof function.

(2) Develop emergency plans for different storage materials and storage conditions.

Hazardous chemicals are highly dangerous and explosive.
We must take precautions in normal work.
These ten explosion-proof measures must be kept in mind to eliminate potential safety hazards and kill the accident in the cradle.

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