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1、 Dust explosion risk analysis

Dust explosion refers to a chemical reaction in which combustible dust mixes with air in a confined space to form a dust cloud. Under the action of an ignition source, the dust air mixture quickly burns and causes a sudden increase in temperature and pressure.

The consequences of dust explosions are severe, with Pmax, (dP/dt) max, and Kst representing the severity of dust explosions.

Test equipment: 1m ³ Can and 20L ball

2、 Classification criteria for the severity of dust explosions

The classification of the consequences of dust explosions should comprehensively consider the number of workers working in explosion hazardous areas and the degree of impact of explosions on surrounding buildings. Based on the principle of classification of production safety accidents, the severity of explosion consequences should be particularly significant in descending order of severity（5) The grading criteria for major (4), major (3), average (2), and minor (1) are:

1. Especially serious (5): accidents that exist in the workplace and are prone to causing more than 30 deaths, more than 100 serious injuries, or direct economic losses of more than 100 million yuan;

2. Major (4): Accidents that exist in the workplace and are prone to causing deaths of 10 to 30 people, serious injuries of 50 to 100 people, or direct economic losses of 50 million to 100 million yuan;

3. Major (3): Accidents that exist in the workplace and are prone to causing 3 to 10 deaths, 10 to 50 serious injuries, or direct economic losses of 10 million to 50 million yuan;

4. General (2): Accidents that exist in the workplace and are prone to causing less than 3 deaths, less than 10 serious injuries, or direct economic losses of less than 10 million yuan;

5. Minor (1): There is no presence or difficulty in causing no death or serious injury in the workplace.

3、 Types of dust explosion protection

The use of explosion protection products can greatly reduce the severity of dust explosion consequences. There are three main types of explosion protection designs: explosion relief, anti explosion, and explosion suppression

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