The dense and realistic action and explosions in the recent hot release of "Bomb Locker 2" add to the movie's feel. One of the shocking explosion scenes is the male protagonist Pan Chengfeng fleeing the scene, using a lighter + flour, to create a big explosion.

Flour + lighter = explosion, which uses the principle of "dust explosion". Under certain circumstances, the explosion of dust is really not alarmist.

Incident 1: On December 28, 2020, a dust explosion occurred in Shanxi Huaqing Co., LTD., resulting in one death and four injuries. The cause of the accident was the dust explosion caused by the welding operation of the welder.

Incident 2: On December 9, 2020, an aluminum powder flash occurred at an armoury in Taiwan, resulting in 3 injuries. The cause of the accident was that an accident occurred when aluminum powder was loaded during regular replacement operations.

Event 3: On July 19, 2020, a sudden fire broke out in Xiapu Industrial Park, Xintang, Zengcheng City, Guangzhou. The cause of the fire was dust caused by the manual demolition machine, and the fire area exceeded 50 square meters.

What is a dust explosion?

Dust explosion refers to the combustible dust in the explosion limit range, encounter heat source (open fire or high temperature), flame instantaneously spread throughout the mixed dust space, chemical reaction speed is extremely fast, while releasing a lot of heat, forming a high temperature and a lot of pressure, the energy of the system into mechanical energy and light and heat radiation, with strong destructive power.

Dust explosion conditions

1, the appropriate concentration of combustible dust;

2, the dust is in a suspended state;

3, a certain oxygen content;

4. There is fire source or strong vibration and friction;

5. In a relatively confined space.

Flour explosion experiment in confined space

Lit candles and flour at the same time in this closed container, through the blower to blow up the flour, "bang" sound, the barrel rose a mushroom cloud and the top lid out, it can be seen that the explosion and fire caused by the dust is very serious.

Hazards of dust explosions

1. It can produce toxic gases. One is carbon monoxide, and the other is the toxic gas that explosives (such as plastics) break down themselves. The production of poison gas often causes a large number of human and animal poisoning casualties after the explosion, which must be paid full attention to.

2. Easy to produce secondary explosions. And the power of the second explosion is much greater than the first, because the first explosion of gas waves deposited on the equipment or the ground to blow up the dust concentration is generally much higher than the first explosion.

3. It's extremely destructive. Dust explosions generally occur in relatively confined Spaces, resulting in extremely serious consequences.

Class 7 dust is easy to cause explosion

1, metal: such as magnesium powder, aluminum powder;

2, coal, grain: such as wheat, starch;

3, feed: such as blood meal, fish meal;

4, agricultural and sideline products: such as cotton, tobacco;

5, forest products: such as paper powder, wood powder;

6, synthetic materials: such as plastics, dyes;

7, the dust generated in the production process of some factories and mines, especially the dust generated in the processing of organic matter.

What to do after a dust explosion

1, if once unfortunately encountered dust explosion, the best way is to immediately lie down to the distance, in order to slow down the damage.

2, in addition to metal dust, the most effective fire extinguishing agent is water, fog water is the best, can both extinguish fire and wet dust. Metal dust (water-repellant substances) such as aluminum, magnesium powder, water reaction, will make the combustion more intense, you can use dry sand, lime.

How to prevent dust explosion

Family: Keep away from open flame when using dust, be sure to stay away from open flame area such as stove gas when making flour or wheat flour, and it is best to open window operation. Myth: Never use flour to put out a fire in a pan.

Factory: Prevent dust deposition and clean up dust in time. Prevent dust from flying around, set up special protective cover and local exhaust hood and maintain a ventilated environment. Relevant enterprises need to install dust concentration measuring instrument to monitor dust concentration in real time.

When enterprises and factories focus on production, they must improve safety awareness and cannot be careless. The ASD-F1000 dust concentration measuring instrument produced by Shenyang Anshi can monitor the dust concentration in real time and minimize the risk.

Applicable occasion

The dust concentration measuring instrument is suitable for continuous monitoring of dust concentration in various dust workplaces. It can be used in metal smelting, water conservancy engineering, building materials processing, grain processing, grain storage, cement manufacturing, power generation, petrochemical, medicine, coal mining, cement manufacturing and packaging industries.