Positive pressure movable type three-phase foam generating device and method

Abstract

The invention relates to the technical field of fire safety, and provides a positive pressure movable type three-phase foam generating device. The positive pressure movable type three-phase foam generating device comprises a skid body trolley, a pressurizing system, a powder adding device, a foam liquid supply system, a positive pressure gas suction type foam jetting system, a foam liquid conveying control valve and a compressed gas source. On the basis of the positive pressure movable type three-phase foam generating device, powder in a powder bin and water injected through a powder adding water feeding pipe from a fire fighting water pipe are mixed under driving of a powder-liquid mixing pump to be prepared into powder slurry, then the powder slurry is injected back to the fire fightingwater pipe, and then is injected into a foam liquid supply system through a powder slurry inlet; the powder slurry (fire fighting water containing particles) and a foam stock solution in a foam stocksolution storage tank are mixed according to the proportion under control of a foam proportion mixer to prepare a foam liquid; and a foam liquid conveying control valve conveys the foam liquid mixed with particles into a foam generator to be mixed with high-pressure gas from the compressed gas source for foaming, and the generated foam is sprayed out by a foam injection cannon for fire extinguishing.

Description

technical field [0001] The invention relates to the technical field of fire safety, in particular to a positive pressure mobile three-phase foam generating device and method. Background technique [0002] Three-phase foam refers to the addition of solid powder to the traditional gas-liquid two-phase foam fire extinguishing agent. The solid powder and the surfactant in the foam work together to improve the stability of the bubbles in the foam. Generally, three-phase foams are superior to gas-liquid two-phase foams in terms of liquid separation time, thermal stability of oil surface, and anti-reburning performance after fire extinguishing. At present, there are many preparation methods and patents on three-phase foam for fire extinguishing in coal mines, but few patents on the generation and injection of three-phase foam for oil fire extinguishing in petrochemical tank farms. [0003] For example, in patent CN 1168891C, the foam liquid containing particle powder is first conf...

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Problems solved by technology

[0007] Aiming at the problem that the fixed three-phase foam generation technology cannot be moved, its use is often limited by its position, and its fire extinguishing ability is limited. The three-phase foam generation and injection device realizes high-efficiency foaming through scientific and reasonable mixing methods and processes. It can be used in petrochemical tank farms, refueling stations, and can be connected with fire trucks (rear hanging) as fire rescue equipment.

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