Foam fire extinguisher

Abstract

The invention provides a foam fire extinguisher, which comprises an inert gas steel bottle (12), water for fire demand (13), a water pump (11), foam liquid (14), a foam liquid pump (10), a gas adjusting valve (7), a water adjusting valve (8), a foam liquid adjusting valve (9) and a fire fighting water branch (4) and further comprises a self designed gas absorber (15) and a gas liquid separation section (3) which are both installed in a cylinder body (15). By means of the characteristic that solubility of gas in water increases with pressure, the gas is absorbed in fire fighting liquid under high pressure, the absorbed gas is released from the liquid with decrease of the pressure, the initial diameter is in nanometer grade, the foam stabilized in the nanometer grade is automatically and evenly distributed, so that foaming agent using quantity is remarkably reduced, and pollution to environment is reduced. Free gas is separated in the gas liquid section (3) and is not sprayed out from the fire fighting water branch, and the technical problem that post-fire immediate onsite rescue is affected caused by surplus air combustion support or the asphyxiating gas field is resolved.

Description

technical field [0001] The invention relates to fire safety facilities, in particular to a foam fire extinguishing device. Background technique [0002] Explosion accidents and fire accidents of different scales occur every year in our country, such as explosion and fire accidents in buildings, warehouses, factories, chemical industry areas, forests and other places, which generate a large amount of fire-fighting wastewater. With the improvement of environmental protection requirements, it has become an issue that cannot be ignored. source of pollution. [0003] In recent years, a large number of foam fire extinguishing agents have been used to improve the fire extinguishing efficiency. The fire extinguishing effect on Class B fires is more obvious, but it also brings some side effects, especially the fire fighting wastewater in chemical industry areas. Toxic substances have complex components, and if they are not well controlled, they will enter urban water supply and drai...

AI Technical Summary

Problems solved by technology

[0005] 1. A large amount of foaming agent is used, which deteriorates the water quality of firefighting wastewater and increases the difficulty of pollution and its treatment

[0006] 2. Most of the compressed air or compressed inert gas used is sprayed into the fire scene in a free state except for the formation of foam. The compressed air causes combustion and affects the fire extinguishing effect; the inert gas causes a suffocating gas field. save

[0007] 3. The size of the formed foam is large, especially the positive pressure mixing foaming method. When the foam enters the normal pressure fire field, the foam expands rapidly and bursts, which affects the stability of the foam.

[0008] 4. The mixed foaming method requires a high concentration of foaming agent, a large amount of foaming gas and energy consumption for stirring, polluting the environment, and high fire extinguishing costs

[0013] 1. The fire-fighting water is sprayed together with the gas that does not form foam. If it is compressed air, it will play a combustion-supporting role; if it is an inert gas, it will cause a suffocating atmosphere after the fire is extinguished. Rescuers cannot enter the scene immediately to rescue and miss the opportunity.

[0014] 2. Using the method of gas-liquid mixing, the fire-fighting fluid has formed foam before entering the fire-fighting water gun, so the apparent density of the fire-fighting fluid is very small, and the inertia after leaving the water gun is also small, so the spraying distance is short

[0015] 3. The amount of foaming agent and foaming gas is large, which increases environmental pollution and fire extinguishing costs

[0016] 4. The bubble size of gas-liquid mixed foaming is large and the stability is not enough

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