What is a superfine dry powder fire extinguishing system

What is a superfine dry powder fire extinguishing system

The additive is composed of fine solid powder after drying, crushing and mixing. It is a widely used fire extinguishing agent in fire fighting, and is mainly used in fire extinguishers. In addition to the special dry powder chemical fire extinguishing agents used to extinguish metal fires, dry powder fire extinguishing agents are generally divided into two categories: BC dry powder fire extinguishing agents (sodium bicarbonate, etc.) and ABC dry powder (ammonium phosphate, etc.).

First, rely on the volatile decomposition products of the inorganic salts in the dry powder to chemically inhibit and negatively catalyze with the free radicals or active groups generated by the fuel during the combustion process, interrupt the combustion chain reaction and extinguish the fire;

The second is that the dry powder powder falls outside the surface of the combustible material, chemical reactions occur, and a glass-like covering layer is formed under the action of high temperature, thereby blocking oxygen and suffocating the fire. In addition, there is a partial dilution of oxygen and cooling effect.

Fire extinguishing principle of ultra-fine dry powder fire extinguishing system

The dry powder fire extinguisher is filled with ammonium phosphate dry powder fire extinguishing agent. Dry powder fire extinguishing agent is a dry and easy-flowing fine powder used for fire extinguishing.

Classification of ultra-fine dry powder fire extinguishing system

Dry powder fire extinguishers can be divided into ABC and BC.

According to the operation mode, it can be divided into portable dry powder fire extinguisher and trolley dry powder fire extinguisher.

It can be divided into ordinary dry powder fire extinguisher and superfine dry powder fire extinguisher according to the type of dry powder fire extinguishing agent.

NaOH + AlCl3 + 2NaHCO3 ==== Al (OH) 3 ↓ + 2CO2 ↑ + 3NaCl