Pulse combustion-driven hot fine water mist generation method and device

A technology of pulsating combustion and fine water mist, applied in spraying devices, liquid spraying devices, etc., can solve problems such as fog machines not working properly, achieve good fire extinguishing effect, high spraying speed, and less water consumption

Active Publication Date: 2011-08-17
BEIHANG UNIV
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Problems solved by technology

Using a large flow of liquid medicine wi

Method used

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  • Pulse combustion-driven hot fine water mist generation method and device
  • Pulse combustion-driven hot fine water mist generation method and device
  • Pulse combustion-driven hot fine water mist generation method and device

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Embodiment Construction

[0017] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0018] Such as figure 2As shown, a thermal mist generating device driven by pulsating combustion is composed of three parts, namely pulsating burner, jacket and water supply system. The pulsation burner adopts the Helmholtz acoustic resonator type, and the fuel is gasoline, mainly composed of an inlet check valve 1, a carburetor passage 2, a throttle 3, a fuel tank 4, an ignition manual air pump 5, a combustion chamber 6, and a tailpipe 7 , a spark plug 15 and an igniter 16; the jacket is an annular channel for the flow of water vapor formed outside the pulsation burner combustion chamber and the tailpipe, and is composed of a straight pipe jacket section 8 and a Laval jacket nozzle 9; the water supply system consists of a water flow The regulating valve 10, the pressure one-way valve 11, the water storage tank 12, the external water supply ...

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Abstract

The invention relates to a pulse combustion-driven hot fine water mist generation method and a pulse combustion-driven hot fine water mist generation device. The hot fine water mist generation method consists of two phase change processes of water, wherein the first phase change is accomplished by vaporizing water into water vapor with a pulse combustion heating device; and the second phase change is accomplished by accelerating the water vapor in a Laval nozzle to convert heat energy into kinetic energy and lowering the temperature of the water vapor in an acceleration process to condense the water vapor into liquid drops with a very small diameter and into fine water mist. The liquid drops are mixed with fuel gas (which is mainly CO2) generated by pulse combustion at the position of the outlet of a spray pipe, and at the same time, the fuel gas heats the fine water mist to 60 to 80 DEG C to form hot fine water mist; and the fuel gas and the hot fine water mist are sprayed to fire sites to extinguish fires. A corresponding portable amplification device consists of three parts, namely, a pulse combustor, a clamping sleeve and a water supply system. The corresponding portable amplification device has the advantages of high extinguishing efficiency, high extinguishing speed, long extinguishing lasting time and the like. The device is mainly used in the field of fire fighting and can also be used in the field of pesticide spraying, mist production and the like.

Description

technical field [0001] The invention relates to a method and device for generating hot water mist driven by pulsating combustion. A Helmholtz type pulsating burner is used as a heating source to vaporize the liquid and accelerate and liquefy it through a nozzle to generate high-speed moving fine water mist . This portable device is mainly used in the field of fire extinguishing, and can also be used in fields such as pesticide spraying and smoke generation. Background technique [0002] There are two main types of commonly used power sources for the production of fine water mist for fire extinguishing: one is a pump; the other is a high-pressure compressed gas. Pumps are generally driven by electric motors or internal combustion engines, which are bulky, heavy, and vibrate violently, making them difficult to use as a power source for portable liquid atomization devices. The power source of the portable liquid atomization device generally adopts the way of high-pressure com...

Claims

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Application Information

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IPC IPC(8): B05B7/20
Inventor 杨立军赵建波尹志仁富庆飞
Owner BEIHANG UNIV
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