阅读说明：本技术 一种泡沫灭火系统及灭火方法 (Foam fire extinguishing system and fire extinguishing method ) 是由 瞿晓花 宋韵 邱波 杨振 王泽潭 邹平志 于 2019-09-24 设计创作，主要内容包括：本发明公开了一种泡沫灭火系统,涉及灭火技术领域,该系统包括消防水源、消防水输送管、泡沫液储罐、泡沫液输送管、氮气储罐、氮气输送管、混合器、混合液输送管、氮气发生器、空气滤清器,消防水输送管上依次设有液体流量计一、调节阀一、单向阀一；泡沫液输送管上依次设有液体流量计二、调节阀二、单向阀二；氮气输送管依次设有截止阀、气体流量计、调节阀三、单向阀三。本发明还公开了采用该系统进行灭火的方法。本发明有益效果是采用氮气与水、泡沫液混合发泡,提高了泡沫对火灾的灭火效果更好；同时改进了混合器的结构,提高了氮气与水、泡沫液混合发泡效果,提高了灭火效果和效率。(The invention discloses a foam fire extinguishing system, which relates to the technical field of fire extinguishing and comprises a fire-fighting water source, a fire-fighting water delivery pipe, a foam liquid storage tank, a foam liquid delivery pipe, a nitrogen storage tank, a nitrogen delivery pipe, a mixer, a mixed liquid delivery pipe, a nitrogen generator and an air filter, wherein the fire-fighting water delivery pipe is sequentially provided with a liquid flow meter I, an adjusting valve I and a one-way valve I; a second liquid flow meter, a second regulating valve and a second one-way valve are sequentially arranged on the foam liquid conveying pipe; the nitrogen conveying pipe is sequentially provided with a stop valve, a gas flowmeter, a third regulating valve and a third check valve. The invention also discloses a method for extinguishing fire by adopting the system. The invention has the beneficial effects that the nitrogen, the water and the foam liquid are mixed and foamed, so that the fire extinguishing effect of the foam on fire is improved; meanwhile, the structure of the mixer is improved, the mixing and foaming effects of nitrogen, water and foam concentrate are improved, and the fire extinguishing effect and efficiency are improved.)

1. A foam fire suppression system characterized by: the fire fighting water supply system comprises a fire fighting water source, a fire fighting water delivery pipe (11), a foam concentrate storage tank, a foam concentrate delivery pipe (21), a nitrogen storage tank (36), a nitrogen delivery pipe (31), a mixer (4) and a mixed liquid delivery pipe (5);

the input end of the fire fighting water delivery pipe (11) is communicated with the fire fighting water source, and the output end of the fire fighting water delivery pipe is communicated with the mixer (4); the fire fighting water delivery pipe (11) is sequentially provided with a liquid flow meter I (12), a regulating valve I (13) and a one-way valve I (14);

the input end of the foam concentrate conveying pipe (21) is communicated with the foam concentrate storage tank, and the output end of the foam concentrate conveying pipe is communicated with the mixer (4); a second liquid flow meter (22), a second regulating valve (23) and a second one-way valve (24) are sequentially arranged on the foam liquid conveying pipe (21);

the input end of the nitrogen conveying pipe (31) is communicated with the nitrogen storage tank (36), and the output end of the nitrogen conveying pipe is communicated with the mixer (4); the nitrogen conveying pipe (31) is sequentially provided with a stop valve (35), a gas flowmeter (32), a third regulating valve (33) and a third check valve (34);

the output end of the mixer (4) is connected with the mixed liquid conveying pipe (5);

the system also comprises a nitrogen generator (37) and an air filter (38), wherein the nitrogen storage tank (36) is sequentially communicated with the nitrogen generator (37) and the air filter (38) through pipelines.

2. A foam fire suppression system according to claim 1, wherein:

the mixer (4) is provided with a fire water inlet (41), a foam liquid inlet (42), a nitrogen inlet (43) and a foam liquid outlet (44);

the fire fighting water inlet (41) and the foam liquid inlet (42) are respectively communicated with the output ends of the fire fighting water delivery pipe (11) and the foam liquid delivery pipe (21), the fire fighting water inlet (41) and the foam liquid inlet (42) are positioned at the top end of the mixer (4), and the fire fighting water inlet (41) and the foam liquid inlet (42) are arranged at an angle;

the nitrogen inlet (43) is communicated with the output end of the nitrogen conveying pipe (31), the nitrogen inlet (43) is positioned below the fire water inlet (41) and the foam concentrate inlet (42), and the nitrogen conveying pipe (31) is obliquely and upwardly connected to the mixer (4);

a baffle plate (45) and a dispersion net (46) are arranged in the mixer (4); the baffle (45) is positioned below the fire water inlet (41) and the foam concentrate inlet (42) and above the nitrogen inlet (43); said dispersion screen (46) being located between said nitrogen inlet (43) and said foam concentrate outlet (44); baffle (45) slope is fixed on the inner wall of blender (4), just a plurality of through-hole (47) have been seted up on baffle (45).

3. A foam fire suppression system according to claim 2, wherein: still be equipped with in blender (4) and be located axial ascending deconcentrator (48) of blender (4), be the toper structure on deconcentrator (48), the toper top of toper structure is up.

4. A foam fire suppression system according to claim 3, wherein: the fire fighting water inlet (41) and the foam concentrate inlet (42) are symmetrically arranged at the top end of the mixer (4) by taking the axial direction of the mixer (4) as a symmetry axis; the disperser (48) is provided with a conical top which faces upwards to the top end of the mixer (4) along the vertical direction.

5. A foam fire suppression system according to claim 4, wherein: the fire fighting water delivery pipe (11) and the foam liquid delivery pipe (21) are obliquely and downwards connected to the mixer (4), and an included angle of 30-75 degrees is formed between the fire fighting water delivery pipe (11) and the foam liquid delivery pipe (21); the disperser (48) is positioned below the intersection point of extension lines of the fire water conveying pipe (11) and the foam liquid conveying pipe (21).

6. A foam fire suppression system according to claim 3, wherein: two conical tops are arranged on the disperser (48), and face the fire water inlet (41) and the foam liquid inlet (42) respectively.

7. A foam fire suppression system according to claim 6, wherein: the disperser (48) is also provided with a water through hole (49).

8. A foam fire suppression system according to claim 2, wherein: the baffle (45) with the contained angle of blender (4) inner wall is 15 ~ 75.

9. A foam fire suppression system according to claim 8, wherein: the nitrogen inlet (43) is perpendicular to the plane of the baffle plate (45), and the axial direction of the through hole (47) is perpendicular to the plane of the baffle plate (45).

10. A method of extinguishing a fire, characterized by: use of a foam fire extinguishing system according to any one of claims 1 to 9 for extinguishing fires.

Technical Field

The invention relates to the technical field of fire extinguishing, in particular to a foam fire extinguishing system and a fire extinguishing method.

Background

At present, when large-scale petroleum and petrochemical fire disasters occur, compressed air foam is generally utilized to extinguish the fire. The principle is that air, water and foam are mixed and foamed under specific and proportional conditions to produce specific foam for fire extinguishing. Compared with the direct water fire extinguishing, the foam can improve the original physical properties of pure water, and has the functions of reducing the surface tension of water, increasing the coverage area of water and the like, so that the fire extinguishing by the foam can quickly and effectively prevent combustion chain reaction, and greatly improve the fire extinguishing efficiency. However, the air in the compressed air foam can introduce fresh oxygen into the combustion, which can adversely affect rapid fire suppression.

In addition, in the compressed air foam fire extinguishing system, the sufficient degree of gas-liquid mixing is related to the foaming times of the foam extinguishing agent, and the foaming times are important indexes of the fire extinguishing efficiency of the system. At present, compressed air and foam mixed liquid are mixed in a mixer, the existing mixer is simple in structure, foam liquid and water are mixed for a long time and are not mixed uniformly enough, and the mixing efficiency of the compressed air and the foam mixed liquid is also low, so that the fire extinguishing efficiency of a compressed air foam fire extinguishing system is influenced.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art: provides a foam fire extinguishing system with good fire extinguishing effect and a fire extinguishing method.

The technical solution of the invention is as follows:

a foam fire extinguishing system comprises a fire water source, a fire water delivery pipe, a foam concentrate storage tank, a foam concentrate delivery pipe, a nitrogen storage tank, a nitrogen delivery pipe, a mixer and a mixed liquid delivery pipe;

the input end of the fire fighting water delivery pipe is communicated with the fire fighting water source, and the output end of the fire fighting water delivery pipe is communicated with the mixer; the fire fighting water delivery pipe is sequentially provided with a first liquid flow meter, a first regulating valve and a first one-way valve;

the input end of the foam concentrate conveying pipe is communicated with the foam concentrate storage tank, and the output end of the foam concentrate conveying pipe is communicated with the mixer; a second liquid flow meter, a second regulating valve and a second one-way valve are sequentially arranged on the foam liquid conveying pipe;

the input end of the nitrogen conveying pipe is communicated with the nitrogen storage tank, and the output end of the nitrogen conveying pipe is communicated with the mixer; the nitrogen conveying pipe is sequentially provided with a stop valve, a gas flowmeter, a third regulating valve and a third check valve;

the output end of the mixer is connected with the mixed liquid conveying pipe;

the system also comprises a nitrogen generator and an air filter, wherein the nitrogen storage tank is sequentially communicated with the nitrogen generator and the air filter through pipelines.

Furthermore, a fire water inlet, a foam liquid inlet, a nitrogen inlet and a foam liquid outlet are formed in the mixer;

the fire-fighting water inlet and the foam liquid inlet are respectively communicated with the output ends of the fire-fighting water conveying pipe and the foam liquid conveying pipe, the fire-fighting water inlet and the foam liquid inlet are positioned at the top end of the mixer, and the fire-fighting water inlet and the foam liquid inlet are arranged at an angle;

the nitrogen inlet is communicated with the output end of the nitrogen conveying pipe, the nitrogen inlet is positioned below the fire water inlet and the foam liquid inlet, and the nitrogen conveying pipe is obliquely and upwardly connected to the mixer;

a baffle and a dispersion net are arranged in the mixer; the baffle is positioned below the fire water inlet and the foam liquid inlet and above the nitrogen inlet; the dispersion net is positioned between the nitrogen inlet and the foam concentrate outlet; the baffle is obliquely fixed on the inner wall of the mixer, and a plurality of through holes are formed in the baffle.

Further, still be equipped with in the blender and be located the ascending deconcentrator of the axial of blender, be equipped with the toper structure on the deconcentrator, the toper top of toper structure is up.

Further, the fire water inlet and the foam liquid inlet are symmetrically arranged at the top end of the mixer by taking the axial direction of the mixer as a symmetry axis; the disperser is provided with a conical top which faces upwards to the top end of the mixer along the vertical direction.

Furthermore, the fire water delivery pipe and the foam liquid delivery pipe are obliquely and downwards connected to the mixer, and an included angle of 30-75 degrees is formed between the fire water delivery pipe and the foam liquid delivery pipe; the disperser is positioned below the intersection point of the extension lines of the fire fighting water delivery pipe and the foam liquid delivery pipe.

Furthermore, two conical tops are arranged on the disperser and face the fire water inlet and the foam liquid inlet respectively.

Furthermore, a water through hole is formed in the disperser.

Furthermore, the included angle between the baffle and the inner wall of the mixer is 15-75 degrees;

further, the nitrogen inlet is perpendicular to the plane of the baffle, and the through hole is axially perpendicular to the plane of the baffle.

A fire extinguishing method adopts the foam fire extinguishing system to extinguish fire.

The invention has the beneficial effects that:

1. the invention adopts nitrogen as compressed gas, and the compressed gas is mixed with water and foam concentrate for foaming to extinguish fire, and the nitrogen is inert gas, so that the combustion supporting for fire can be avoided, the combustion inhibiting effect can be realized on the surface of a combustion substance, the suppression capability for the fire can be enhanced, and the fire extinguishing effect for the fire is better. Meanwhile, the nitrogen generator is arranged in the fire extinguishing system and used as a source of compressed nitrogen, so that the compressed nitrogen can be continuously supplied, the fighting capacity of the whole fire extinguishing system is improved, and the fire extinguishing system is particularly suitable for treating large-scale fire.

2. According to the invention, by changing the structure of the gas-liquid mixer, the mixing effect of water and foam liquid is improved, the mixing effect of foam mixed liquid and nitrogen is improved, the foaming effect of the foam liquid is improved, and the fire extinguishing effect of the fire extinguishing system is improved; in addition, the mixer of the invention simultaneously mixes the water, the foam liquid and the compressed nitrogen, but does not mix the water, the foam liquid and the compressed nitrogen step by step, thereby saving the foaming time of the foam liquid and improving the efficiency of fire rescue.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a mixer in example 3 of the present invention;

FIG. 3 is a schematic structural view of a mixer in example 4 of the present invention;

shown in the figure: 11. a fire hose; 12. a first liquid flow meter; 13. adjusting a valve I; 14. a one-way valve I; 21. a foam liquid conveying pipe; 22. a second liquid flow meter; 23. a second regulating valve; 24. a second one-way valve; 31. a nitrogen conveying pipe; 32. a gas flowmeter, 33, a third regulating valve, 34 and a third one-way valve; 35. a stop valve; 36. a nitrogen storage tank; 37. a nitrogen generator; 38. an air cleaner; 4. a mixer; 41. a fire water inlet; 42. a foam liquid inlet; 43. a nitrogen inlet; 44. a foam liquid outlet; 45. a baffle plate; 46. a dispersion net; 47. a through hole; 48. a disperser; 49. a water inlet; 5. and a mixed liquid conveying pipe.

Detailed Description

The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.