What fire extinguisher is used to extinguish a solid matter fire?

It is best to extinguish solid fires with water, foam, ammonium phosphate dry powder fire extinguishing agent.

According to the combustion substance and characteristics, fires are divided into four categories: A, B, C, and D: Class A, which refers to may.

fires that burn solid substances; Category B, which refers to liquid fires and melted solid matter fires; Class C refers to flammable gases.

Fire; Category D refers to the fire of combustible metals, such as potassium, sodium, magnesium, titanium, lithium, aluminum alloy and other substances.

Different fire extinguishing agents should be selected according to different types of fires

Water, foam, ammonium phosphate dry powder fire extinguishing agent should be used to extinguish Class A fires.

Dry powder and foam fire extinguishing agents should be used to extinguish Class B fires.

Extinguishing polar solvents.

Chemical foam fire extinguishing agent and anti-soluble foam fire extinguishing agent shall not be used for Class B fires.

Dry powder and carbon dioxide fire extinguishing agents should be used to extinguish Class C fires.

7150 fire extinguishing agent, sand, soil, etc. are used to extinguish Class D fires.

Category A for extinguishing solid material fires is a solid fire: refers to a fire that burns carbon-containing solid combustibles, such as wood, cotton, wool, hemp, paper, etc.

Fire extinguisher: It is a portable fire extinguishing tool. Chemicals are placed inside the fire extinguisher to extinguish the fire.

Fire extinguishers are one of the common fire prevention facilities, stored in public places or places where fires may occur, different types of fire extinguishers are filled with different ingredients, and are specially designed for different fire causes. Care must be taken when using it to avoid counter-effects and dangers.

Gas cylinder type, pressure storage type, chemical reaction type; According to the fire extinguishing agent filled, it can be divided into: foam, dry powder, halide alkane, carbon dioxide, clean water, etc.

Dry chemical fire extinguishers are required to extinguish solid material fires. Dry powder fire extinguishers can extinguish general fires, and can also extinguish fires caused by the combustion of oil and gas. The dry powder fire extinguisher uses carbon dioxide gas or nitrogen gas as the power to spray the dry powder in the cylinder to extinguish the fire.

Dry powder is a dry, easy-to-flow fine solid powder, composed of a base material that can extinguish fires and additives such as moisture-proof agents, flow accelerators, and anti-caking agents.

How to use: The most commonly used opening method for dry chemical fire extinguishers is the pressure handle method. After lifting the fire extinguisher to the appropriate position from the fire source, first turn it upside down several times to loosen the dry powder in the cylinder, and then let the nozzle be aimed at the most violent burning, pull out the safety pin, press down the pressure handle, and the fire extinguishing agent will be sprayed out to extinguish the fire. When turning on the dry powder fire extinguisher, hold the middle of the fire with your left hand, aim the nozzle at the root of the flame, pull out the safety card with your right hand, rotate the opening knob, open the gas storage cylinder, and wait for 1-4 seconds, and the dry powder will spray out to extinguish the fire.

Water-type fire extinguishers, foam fire extinguishers, ammonium phosphate dry powder fire extinguishers, halide fire extinguishers.

Class A fires are solid material fires. Such as hay, wood, cotton, wool, hemp, paper, etc., such substances often have the nature of organic substances, and generally produce scorching embers when burned.

To extinguish Class A fires, you can choose water-type fire extinguishers, foam fire extinguishers, ammonium phosphate dry powder fire extinguishers, and halide fire extinguishers. Foam fire extinguishers (chemical foam fire extinguishers are limited to extinguishing non-polar solvents), dry chemical fire extinguishers, halide fire extinguishers, and carbon dioxide fire extinguishers can be selected to extinguish Class B fires.

Common sources of ignition. The source of fire is the source of fire, and it is also the direct cause of burning and **. Therefore, to prevent fire, 10 kinds of fire sources should be controlled, specifically: all kinds of open flames lit by people every day are the most common fire sources, and they must be controlled when they are used.

The electrical equipment used in enterprises and all walks of life can burn combustible gases and combustible substances due to overload operation, short circuit, poor contact, lightning strikes and electrostatic sparks in nature, and must be safe and protected in use. Dry firewood, wood, wood near the stove or flue, combustible dust and fibers that accumulate on the high-temperature steam pipes; Paper, clothing, etc., next to high-power light bulbs, will cause burning if they are baked for too long.

In the process of refining and baking, due to poor temperature control or automatic control failure, it will catch fire and even cause disaster. Stir-fried food or other substances that accumulate without heat dissipation, or are packed in bags, will also accumulate heat**, and attention must be paid to heat dissipation. The heat treatment workpieces of the enterprise are stacked on the ground with oil stains, or stacked next to flammable products (such as wood), which are easy to cause disasters and should be stacked in a safe place.

Under the condition that there is neither open flame nor heat source, lignite, wet straw, wheat straw, cotton, rapeseed, soybean cake and cotton yarn, gloves, clothes, wood chips, metal scraps, polishing dust and oilcloth that has been wiped with the equipment are accumulated together for too long, and they will also heat up, and when the conditions are met, they may cause spontaneous combustion, which should be treated frequently.

When substances of different properties meet, they can sometimes cause spontaneous combustion. If the oil comes into contact with oxygen, a strong chemical reaction will occur, causing combustion. Friction and impact.

For example, the impact of iron and cement will lead to flowers, and flammable materials can cause disasters. Insulation compression, chemical thermal reaction, can cause a rise in temperature, so that combustibles are added to the ignition point.

It is best to extinguish solid fires with water, foam, ammonium phosphate dry powder fire extinguishing agent.

According to the combustible substances and characteristics, fires are divided into four categories: A, B, C, and D: Class A, which refers to the fire of combustible solid substances; Category B, which refers to liquid fires and melted solid matter fires; Category C, which refers to combustible gas fires; Category D refers to the fire of combustible metals, such as potassium, sodium, magnesium, titanium, lithium, aluminum alloy and other substances.

Different fire extinguishing agents should be selected according to different types of fires

Water, foam, ammonium phosphate dry powder fire extinguishing agent should be used to extinguish Class A fires.

Dry powder and foam fire extinguishing agents should be used to extinguish Class B fires.

Chemical foam fire extinguishing agent and anti-soluble foam fire extinguishing agent shall not be used to extinguish polar solvent class B fire.

Dry powder and carbon dioxide fire extinguishing agents should be used to extinguish Class C fires.

7150 fire extinguishing agent, sand, soil, etc. are used to extinguish Class D fires.

Dry chemical fire extinguishers

Sodium bicarbonate dry powder fire extinguisher is suitable for flammable, combustible liquid, gas and live equipment for initial disasters; In addition to the above-mentioned types of fires, ammonium phosphate dry powder fire extinguishers can also be used to extinguish the initial disaster of solid substances. But none of them can extinguish metal burning fires.

Acid and alkali fire extinguishers

It is suitable for extinguishing the initial disaster of the combustion of Class A substances, such as wood, fabric, paper, etc. It cannot be used to extinguish fires where Class B substances burn, nor can it be used to extinguish Class C flammable gases or Class D light metal fires. At the same time, it cannot be used to extinguish fires with live objects.

Fire extinguishing principle. The dry chemical fire extinguisher is filled with ammonium phosphate dry powder fire extinguishing agent. Dry powder fire extinguishing agent is a dry and easy-to-flow fine powder used for fire extinguishing, which is composed of inorganic salts with fire extinguishing effect and a small amount of additives that are dried, crushed and mixed into fine solid powder. It is a fire extinguishing agent that is widely used in fire fighting and is mainly used in fire extinguishers.

In addition to the special dry powder chemical fire extinguishing agent for fighting metal fires, dry powder fire extinguishing agents are generally divided into two categories: BC dry powder fire extinguishing agent (sodium bicarbonate, etc.) and ABC dry powder (ammonium phosphate, etc.).

First, the volatile decomposition of inorganic salts in the dry powder is chemically inhibited and negatively catalyzed by the free radicals or active groups produced by the fuel during the combustion process, so that the chain reaction of combustion is interrupted and the fire is extinguished;

Second, the powder of dry powder falls outside the surface of combustibles, undergoes a chemical reaction, and forms a glass-like covering layer under the action of high temperature, thereby isolating oxygen, and then suffocating and extinguishing fires. In addition, there is a partial dilution of oxygen and cooling.

The national standard divides fires into 6 categories according to the burning object:

Class A fire: Solid matter fire. This substance is usually organic in nature and can produce scorching embers when burned.

Category B fires: fires of liquids or meltable solid substances.

Class C fires: gas fires.

Class D fires: metal fires.

Class E fire: live fire. A fire in which an object burns with electricity.

Category F fire: Fire of cooking objects (such as animal and vegetable fats) in cooking utensils.

Water-type fire extinguishers, ammonium phosphate dry powder fire extinguishers, and foam fire extinguishers should be used in Class A fire places.

Dry chemical fire extinguishers

The substance in the dry powder fire extinguisher is ammonium phosphate, which will react to produce a large amount of carbon dioxide gas, thereby blocking the contact from oxygen and then extinguishing the fire. Dry powder fire extinguisher is a fire extinguisher widely used in life, which can not only extinguish fires caused by solids, but also be used to extinguish the initial fire of flammable liquids, combustible gases and electrical equipment such as petroleum and organic solvents. Since it mainly uses carbon dioxide gas to block the air, it is also more useful and safer.

Dry chemical fire extinguishers are suitable for solid fires, and ABC dry chemical fire extinguishers are suitable for three types of fires.

Category A is a solid fire: refers to a fire that burns solid combustibles containing carbon, such as wood, cotton, wool, hemp, paper, etc.;

Use a dry powder fire extinguisher.

It is best to extinguish solid fires with water, foam, ammonium phosphate dry powder fire extinguishing agent.

It depends on what kind of combustible solid, if it is cotton and linen fabric or wood paper, etc., you can use a water-type fire extinguisher or an acid and alkali fire extinguisher. If it is a combustible solid such as archival documents or library materials, an alkyl halide fire extinguisher can be used.

In fact, basically fire extinguishers can be used to extinguish combustible solid fires, but the focus is different, due to cost and efficacy factors, general halides, carbon dioxide, foam and other fire extinguishers are not used to extinguish.

All kinds of fire extinguishers generally have specific models and logos, and the models of fire extinguishers in China are prepared in accordance with the "Fire Product Model Preparation Method" (GN11-1982). It consists of several parts: class, group, feature code and main parameters.

The class, group, and feature codes are represented by uppercase Chinese pinyin letters, which are generally numbered at the top of the model, and are the code names of the fire extinguisher itself, usually represented by "m". The fire extinguishing agent code is numbered in the second place of the model: F - dry powder fire extinguishing agent; t - carbon dioxide fire extinguishing agent; Y-1211 fire extinguishing agent; Q - water fire extinguishing agent.

The third digit of the form number in the model is the code of the structural characteristics of various types of fire extinguishers. At present, the structural characteristics of fire extinguishers in China include five types: portable type (including handwheel type), cart type, duckbill type, boat car type, and knapsack type, which are represented by S, T, Y, Z, and B.

Ammonium phosphate dry powder fire extinguisher should be used for combustible solid fires, which can extinguish general fires and fires caused by oil, gas and other combustion.

Dry powder fire extinguisher uses carbon dioxide gas or nitrogen gas as the power to spray out the dry powder in the cylinder to extinguish the fire.

Dry powder is a dry, easy-to-flow fine solid powder, consisting of a base material that can extinguish fires and additives such as moisture-proof agents and anti-caking agents.