Whether the installation of dust detector can effectively prevent dust explosion, first understand why dust explosion occurs. The principle of dust explosion is very simple, similar to that of gas explosion, but after all, one is gas solid mixed explosion and the other is pure gas explosion, so there must be differences in nature.
The power of dust explosion is sometimes much greater than that of gas explosion, and the reason is simple. For example, coal powder will react with oxygen and produce carbon dioxide, which can also be inferred by virtue of high school chemistry knowledge. This process will release a lot of gas and heat. In the process from solid to gas, the expansion of volume is often much larger than that from gas to gas, so the power is generally stronger than that of gas explosion.
Generally, there are three main reasons for explosion.
1. Static electricity, especially when some dust is transported in the pipeline, the friction with the pipeline will also produce static electricity, even sparks.
2. For human reasons, such as smoking in dust places, failing to place explosion-proof lamps in dust places according to regulations, failing to monitor dust to reach the explosion range, or failing to install dust removal devices according to regulations.
3. Pressure relief. Once there is a dust explosion, if people are exposed to the dust, it will definitely cause casualties. The only measure is to send them to the hospital for rescue. However, if the pipeline transporting dust explodes, pressure relief ports can be set at relevant parts of the pipeline to avoid chain reaction. In case of explosion, release energy through pressure relief port to reduce loss.
In fact, after installing the dust detector, it will have an alarm device. As long as the dust concentration exceeds the warning value, it will give an alarm. What we can do is to evacuate and ventilate people.