Clean gas foam fire extinguishing system

Abstract

The utility model discloses a clean gas foam fire extinguishing system. The clean gas foam fire extinguishing system comprises a proportional mixing device and a pipeline mixer, according to the clean gas foam fire extinguishing system, a fire pump, a clean gas storage tank and a foam liquid box are arranged outside a water pool, proportional mixing devices are arranged on the outer sides of the fire pump, the clean gas storage tank and the foam liquid box, the fire pump is connected with a storage tank special foam generator through a main pipeline, and the main pipeline is connected with a pipeline mixer; the proportional mixing device is installed on the main pipeline and located between the pipeline mixer and the fire pump, the clean gas storage tank and the foam liquid box are both connected to the proportional mixing device, and the arranged proportional mixing device firstly mixes water and clean gas according to a certain proportion to form clean gas mixed liquid. And then foam liquid is mixed to form clean gas foam mixed liquid. Compared with the prior art, the content of clean gas in the foam is improved. In actual fire extinguishing, the fire extinguishing time is shortened, and the foaming condition is better.

Description

Technical Field

[0001] The utility model relates to the technical field of fire fighting, in particular to a clean gas foam fire extinguishing system. Background Art

[0002] Storage tanks for low-boiling-point flammable liquids such as propylene oxide and n-pentane are widely used in petrochemical enterprises. Compared with other flammable liquids, the saturated vapor pressure of low-boiling-point flammable liquids is stronger. Once a fire occurs, it is difficult to extinguish the fire. If the disaster is not effectively controlled in time, there is a high possibility of explosion of flammable liquid storage tanks, spread of fire, and formation of major disasters such as flowing fire.

[0003] Traditionally, this type of flammable liquid storage tank is generally equipped with an air foam fire extinguishing system. However, multiple tests and studies within the industry have shown that air foam is only effective for ordinary flammable liquids, and can hardly be effectively extinguished for low-boiling-point flammable liquids, and some even cannot control the fire. In response to this phenomenon, clean gas foam fire extinguishing technology was later introduced, with clean gas represented by heptafluoropropane replacing traditional air, thus breaking the technical problem that low-boiling-point flammable liquids cannot be effectively extinguished once a fire occurs.

[0004] The existing pump-in clean gas foam mixing system uses a metering pump to inject clean gas into a mixer, and then mixes it with another set of mechanical pumps or other forms of driven foam mixed liquid.

[0005] The existing clean gas foam fire extinguishing technology represented by HFC-227ea is to pre-mix water and foam stock solution, then use HFC-227ea as the foaming medium of the foam mixture, and release it from the terminal generator after mixing it through the HFC-227ea foam mixing device. Experimental research has found that although this technology can extinguish low-boiling point flammable liquid fires, the vaporized HFC-227ea is difficult to be completely preserved in the foam. The actual content of HFC-227ea in the foam is relatively low, and the other part is lost in the atmosphere, which greatly reduces the fire extinguishing effect. Utility Model Content

[0006] The utility model aims to provide a clean gas foam fire extinguishing system to solve the problem that the prior art proposed in the above background technology can extinguish low-boiling point flammable liquid fires, but the gasified heptafluoropropane is difficult to be completely preserved in the foam, the heptafluoropropane content in the actual foam is relatively low, and the other part is lost in the atmosphere, so that the fire extinguishing effect is greatly reduced.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A clean gas foam fire extinguishing system comprises a water pool, wherein a fire water pump, a clean gas storage tank and a foam liquid tank are arranged outside the water pool, a proportional mixing device is arranged outside the fire water pump, the clean gas storage tank and the foam liquid tank, the fire water pump is connected to a tank-specific foam generator through a main pipeline, a pipeline mixer is connected to the main pipeline, the proportional mixing device is installed on the main pipeline and is located between the pipeline mixer and the fire water pump, the clean gas storage tank and the foam liquid tank are both connected to the proportional mixing device, and the proportional mixing device and the pipeline mixer are connected through a pipeline.

[0009] As a further solution of the utility model: the fire water pump is connected to the water tank through a pipeline, and a stop valve is provided on the pipeline.

[0010] As a further solution of the utility model: the proportion mixing device includes a turbine, a coupling, and a double-pump-head positive displacement pump.

[0011] As a further solution of the utility model: the water turbine is connected to the main pipeline, the water turbine and the main pipeline are connected in series, and the main pipeline drives the water turbine to operate.

[0012] As a further solution of the utility model: the water turbine is connected to the double-pump-head positive displacement pump via a coupling, and the water turbine drives the double-pump-head positive displacement pump via the coupling.

[0013] As a further solution of the utility model: the two inlet ends of the double-pump head positive displacement pump are respectively connected to the clean gas storage tank and the foam liquid tank through pipelines, and the two outlet ends of the double-pump head positive displacement pump are connected to the mixing port of the pipeline mixer through pipelines, and the pipeline mixer is provided with two mixing ports.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The proportion mixing device provided in the utility model first mixes water and clean gas in a certain proportion to form a clean gas mixed liquid. Then the foam liquid is mixed to form a clean gas foam mixed liquid. Compared with the prior art, the content of clean gas in the foam is increased. In actual fire extinguishing, the fire extinguishing time is shortened and the foaming condition is better.

[0016] 2. During operation, the system only uses the fire pump to drive the water source, without the need for other high-power motors. The turbine can be driven without consuming additional water, which is energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a clean gas foam fire extinguishing system.

[0018] Figure 2 This is a diagram showing a proportional mixing device in a clean gas foam fire extinguishing system.

[0019] In the figure: 1. water tank; 2. fire water pump; 3. proportion mixing device; 301. turbine; 302. coupling; 303. double-head positive displacement pump; 4. clean gas storage tank; 5. foam liquid tank; 6. pipeline mixer; 7. main pipeline; 8. special foam generator for storage tank. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figures 1-2 In an embodiment of the utility model, a clean gas foam fire extinguishing system includes a water pool 1, a fire pump 2, a clean gas storage tank 4 and a foam liquid tank 5 are arranged outside the water pool 1, a proportional mixing device 3 is arranged outside the fire pump 2, the clean gas storage tank 4 and the foam liquid tank 5, the fire pump 2 is connected to a tank-specific foam generator 8 through a main pipeline 7, a pipeline mixer 6 is connected to the main pipeline 7, the proportional mixing device 3 is installed on the main pipeline 7 and is located between the pipeline mixer 6 and the fire pump 2, the clean gas storage tank 4 and the foam liquid tank 5 are both connected to the proportional mixing device 3, and the proportional mixing device 3 and the pipeline mixer 6 are connected through a pipeline.

[0022] The clean gas storage tank 4 is provided with a clean gas fire extinguishing agent, and the clean gas fire extinguishing agent is preferably heptafluoropropane, but is not limited to heptafluoropropane. It can also be perfluorohexanone, trifluoromethyl iodide, perfluoropropane, perfluorobutane, perfluoroethane, dichlorodifluoroethane, chlorodifluoromethane, chlorotetrafluoroethane, pentafluoroethane, trifluoromethane, hexafluoropropane, argon, nitrogen, carbon dioxide, a mixed gas composed of argon, nitrogen and carbon dioxide, etc.

[0023] The foam liquid tank 5 is provided with a foam fire extinguishing agent, which refers to an aqueous film-forming foam liquid, but is not limited to an aqueous film-forming foam liquid. It can also be a protein foam liquid, a fluoroprotein foam liquid, a synthetic foam liquid, an anti-soluble foam liquid, a film-forming fluoroprotein foam liquid, an anti-soluble protein foam liquid, an anti-soluble fluoroprotein foam liquid, an anti-soluble synthetic foam liquid, an anti-soluble aqueous film-forming foam liquid, an anti-soluble film-forming fluoroprotein foam liquid, a medium-multiple foam liquid, a high-multiple foam liquid, a high-medium-low-multiple foam liquid, an anti-soluble high-medium-low-multiple foam liquid, a Class A foam fire extinguishing agent, and the like.

[0024] The fire water pump 2 is connected to the water tank 1 through a pipeline, and a stop valve is provided on the pipeline.

[0025] The proportion mixing device 3 includes a turbine 301, a coupling 302, and a double-pump head positive displacement pump 303. The double-pump head positive displacement pump 303 is preferably a plunger pump, but is not limited to a plunger pump. The system adopts a unique design of the double-pump head positive displacement pump 3, which can simultaneously inhale clean gas and foam liquid, reducing the cost of the clean gas foam generating device, and the system is integrated and compact.

[0026] The water turbine 301 is connected to the main pipeline 7 , and the water turbine 301 and the main pipeline 7 are connected in series, and the main pipeline 7 drives the water turbine 301 to operate.

[0027] The water turbine 301 is connected to the double-pump-head positive displacement pump 303 via the coupling 302 , and the water turbine 301 drives the double-pump-head positive displacement pump 303 via the coupling 302 .

[0028] The two inlet ends of the double-pump head positive displacement pump 303 are respectively connected to the clean gas storage tank 4 and the foam liquid tank 5 through pipes, and the two outlet ends of the double-pump head positive displacement pump 303 are connected to the mixing port of the pipeline mixer 6 through pipes. The pipeline mixer 6 is an integrated double liquid inlet mixing port. The mixing order is preferably that the clean gas is mixed into the pressurized water first, but it is not limited to this mixing order.

[0029] The water pool 1 is connected with a water injection pipe, and a float valve is arranged at the end of the water injection pipe located in the water pool 1, and a stop valve is also connected to the water injection pipe.

[0030] The water tank 1, the fire water pump 2, the proportioning mixing device 3, the clean gas storage tank 4, the foam liquid tank 5, the pipeline mixer 6, the main pipeline 7 and the special foam generator 8 for the storage tank together constitute a clean gas foam fire extinguishing system. The fire water pump 2, the turbine 301, the double-pump head positive displacement pump 303, the pipeline mixer 6 and the special foam generator 8 for the storage tank are all existing products on sale. The fire water pump 2 is externally connected to a power supply and a switch.

[0031] The working principle of the utility model is:

[0032] When a fire occurs, the fire water pump 2 is started and water enters the main pipeline 7 of the system; the water entering the main pipeline 7 further impacts the turbine 301 and flows into the pipeline mixer 6; the turbine 301 rotated by the impact drives the double-pump head positive displacement pump 303 to work through the coupling 302; the double pump heads of the double-pump head positive displacement pump 303 respectively inhale clean gas and foam liquid in different proportions from the clean gas storage tank 4 and the foam liquid tank 5; the output clean gas and foam liquid are respectively injected into the pipeline mixer 6, and the clean gas is preferentially mixed with the fire water to form a clean gas mixed liquid of a certain proportion; the clean gas mixed liquid is further mixed with the foam liquid in the pipeline mixer 6 to form a clean gas foam mixed liquid of a certain proportion; the clean gas foam mixed liquid further flows into the special foam generator 8 for the storage tank, and finally forms a clean gas foam release, which acts on the low-boiling point flammable liquid storage tank to achieve fire extinguishing.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A clean gas foam fire extinguishing system, comprising a water tank (1), characterized in that: A fire pump (2), a clean gas storage tank (4) and a foam liquid tank (5) are arranged outside the water pool (1); a proportion mixing device (3) is arranged outside the fire pump (2), the clean gas storage tank (4) and the foam liquid tank (5); the fire pump (2) is connected to a tank-specific foam generator (8) via a main pipeline (7); a pipeline mixer (6) is connected to the main pipeline (7); the proportion mixing device (3) is installed on the main pipeline (7) and is located between the pipeline mixer (6) and the fire pump (2); the clean gas storage tank (4) and the foam liquid tank (5) are both connected to the proportion mixing device (3); and the proportion mixing device (3) and the pipeline mixer (6) are connected via a pipeline.

2. A clean gas foam fire extinguishing system according to claim 1, characterized in that: The fire water pump (2) is connected to the water pool (1) via a pipeline, and a stop valve is provided on the pipeline.

3. A clean gas foam fire extinguishing system according to claim 1, characterized in that: The proportion mixing device (3) comprises a water turbine (301), a coupling (302), and a double-pump-head positive displacement pump (303).

4. A clean gas foam fire extinguishing system according to claim 3, characterized in that: The water turbine (301) is connected to the main pipeline (7).

5. A clean gas foam fire extinguishing system according to claim 3, characterized in that: The water turbine (301) is connected to a double-pump-head positive displacement pump (303) via a coupling (302).

6. A clean gas foam fire extinguishing system according to claim 3, characterized in that: The two inlet ends of the dual-pump head positive displacement pump (303) are respectively connected to the clean gas storage tank (4) and the foam liquid tank (5) through pipelines, and the two outlet ends of the dual-pump head positive displacement pump (303) are connected to the mixing port of the pipeline mixer (6) through pipelines. The pipeline mixer (6) is provided with two mixing ports.

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