Explosion proof measures for pneumatic conveying
Dust explosion is very dangerous, so how to prevent itpneumatic conveyingWhat are the dangers of it? Let me take you to understand:
1. The existence or appearance of ignition sources is the most direct cause of dust explosions. According to statistical data analysis, the types of ignition sources and their probability of occurrence are,
Reserve sufficient release port (door or membrane) area on the device to promptly suppress dust explosions. As shown in the figure:
At a certain rate of pressure increase, the release area depends on the volume of the container itself, as shown in the figure. There are three different maximum pressure rise rate conditions listed in the figure: A is below 3.45 MPa · s-1, B is between 3.45 and 69 MPas-C is above 69 MPa · s -; The above. Specifically, it can be determined according to the so-called "cube root law", that is
In the equation (dp/dt)maxMaximum boost rate:?
V - Container volume;
The K-explosion characteristic number depends on the type, particle size, dust concentration, initial and final pressure of the dust.
Due to the diverse and fine types of dust particles with a large surface area, the process of ignition and detonation is extremely difficult to extinguish
So the measures to suppress and extinguish dust explosions must play their full role in an instant in order to quickly prevent explosions before they ignite. The relationship between explosion pressure and time after ignition, and the explosion-proof device at the terminal of the pneumatic conveying system. The explosion-proof information comes from pressure sensors, which are transmitted by pressurePneumatic conveying systemExplosion proof device at the terminalImmediately activate the sensor and spray type fire extinguishing system?
1. Pneumatic conveying pipeline
2-Cyclone separator
3-Small high-speed jet fire extinguisher
4 Large Businesses?The device. Jet fire extinguisher?
5-bag dust collector
6 pressure sensor silo start