Preparation method and application of coupling fire extinguishing agent with functions of extinguishing fire and removing carbon monoxide in fire scene in limited space

Abstract

The invention discloses a coupling fire extinguishing agent with functions of extinguishing fire and removing carbon monoxide in a fire scene in a limited space, and the coupling fire extinguishing agent is prepared from the following raw materials in 100 parts: 75-80 parts of a fire extinguishing base material, 12-15 parts of a manganese oxide molecular sieve, 5-8 parts of a lubricating agent and 4-6 parts of a moisture-proof agent, wherein the haloxylon ammodendron fire extinguishing base material comprises sodium bicarbonate, ammonium carbonate and ammonium phosphate. Researches show that the removal efficiency of the coupling fire extinguishing agent for removing the carbon monoxide can be regulated and controlled by changing the content of the catalyst, and the optimized catalyst can effectively promote the catalytic oxidation process of the carbon monoxide. According to the preparation method of the coupling fire extinguishing agent, carbon monoxide is removed by changing the ratio of the catalyst to the fire extinguishing agent, in the treatment process of the catalyst and the fire extinguishing agent, the particle size of each component is controlled through a crusher and a sieve, and the coupling fire extinguishing agent has excellent catalytic activity and structural stability.

Description

Technical Field

[0001] The present application belongs to the technical field of fire extinguishing agent preparation, and in particular, relates to a method for preparing a coupled fire extinguishing agent capable of extinguishing a fire in a limited space and cooperatively removing carbon monoxide from a fire scene, and its application. Background Art

[0002] Dry powder fire extinguishing agent has the characteristics of long service life, high fire extinguishing efficiency, low price, low toxicity and environmental friendliness, and is a type of halon substitute widely used in the field of fire protection engineering. However, since the currently used ammonium phosphate dry powder fire extinguishing agent and bicarbonate dry powder fire extinguishing agent partially or completely decompose at around 155°C, they are prone to failure when stored in high temperature environment for a long time, which limits the application of dry powder fire extinguishing agent. In order to expand the application scope of dry powder fire extinguishing agent, finding new high temperature resistant fire extinguishing effective components has become one of the development hotspots in the current fire protection field.

[0003] Chinese patent CN 114773776A discloses a polyoxymethylene granular material of a halogen-free intumescent flame retardant system, comprising 57-63.5% polyoxymethylene, 6-10% melamine polyphosphate, 4-7% basic sodium aluminum carbonate, 0.5-1.5% processing aid, and the rest being phosphorus-nitrogen flame retardant. The material can be used in flame-retardant polyoxymethylene parts and accessories in the fields of fire protection, petrochemicals, metallurgy, etc., such as the use of fire-retardant zippers in fire-retardant clothing.

[0004] Chinese patent CN 106243709 A discloses a polyphenylphosphonic acid diphenyl sulfone ester synergistic basic aluminum magnesium carbonate flame retardant cable material, including nylon 6643-56%, halogenated bisphenol A polycarbonate 31-44%, poly 2,6-dibromophenyl ether 24-37%, tridecyl benzyl ester 13-17%, polyphenylphosphonic acid diphenyl sulfone ester 12-16%, skarn 15-20%, calcium montanate 3-4%, cordierite 9-18%, basic aluminum magnesium carbonate 7-12%, talc 13-19%, N-ethyl p-toluenesulfonamide 12-18%, tris(2,3-dichloropropyl) phosphate 10-15%, candelilla wax 5-9%, brucite fiber 10-15%, which has the advantages of excellent flame retardant performance, low smoke emission, high oxygen index, good heat resistance, high mechanical strength, etc. Summary of the invention

[0005] The technical problem to be solved by the present application is to overcome the medium defects of the prior art and provide a method for preparing a coupled fire extinguishing agent capable of extinguishing fire in a limited space and removing carbon monoxide from a fire scene and its application.

[0006] This application adopts the following technical solutions to solve the above technical problems:

[0007] The present application provides a coupled fire extinguishing agent with the function of extinguishing fire in a limited space and removing carbon monoxide from a fire scene in a coordinated manner, characterized in that, based on 100 parts, its raw materials include the following components: 75-80 parts of a fire extinguishing base material, 12-15 parts of a manganese oxide molecular sieve, 5-8 parts of a lubricant, and 4-6 parts of a moisture-proof agent;

[0008] Among them, the Haloxylon ammodendron fire extinguishing base materials include sodium bicarbonate, ammonium carbonate and ammonium phosphate.

[0009] Preferably, based on 100 parts, the raw materials include the following components: 75 parts of fire extinguishing base material, 15 parts of manganese oxide molecular sieve, 5 parts of lubricant, and 5 parts of moisture-proof agent.

[0010] Preferably, the manganese oxide molecular sieve is a manganese oxide octahedral molecular sieve, which is prepared by a hydrothermal synthesis method.

[0011] Preferably, the lubricant includes one or more of magnesium stearate, mica powder, and talc powder.

[0012] Preferably, the moisture-proofing agent comprises silica gel.

[0013] The present application also provides a coupled fire extinguishing agent that can extinguish fire in a limited space and remove carbon monoxide from a fire scene. The preparation method comprises: mixing the components according to the above proportions, granulating, screening to obtain a powder, and drying to obtain the powder.

[0014] A method for preparing a coupled fire extinguishing agent capable of extinguishing fire in a limited space and removing carbon monoxide from a fire scene, characterized in that it comprises: mixing the components according to the above proportions, granulating, screening to obtain a powder, and drying to obtain the powder.

[0015] Preferably, the sieving is in granular or fine powder form.

[0016] Wherein, the particle size of the screening is 10 μm or 30-60 μm.

[0017] Second aspect:

[0018] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present application.

[0019] The reagents and raw materials used in this application are commercially available.

[0020] The positive progress of this application is that: this application has found through research that the removal efficiency of carbon monoxide by the coupled fire extinguishing agent can be regulated by changing the catalyst content, and the optimized catalyst can effectively promote the catalytic oxidation process of carbon monoxide. The method for preparing the coupled fire extinguishing agent provided by the present invention achieves the removal of carbon monoxide by changing the ratio of the catalyst and the fire extinguishing agent. In the process of treating the catalyst and the fire extinguishing agent, the particle size of each component is controlled by a crusher and sieving. The coupled fire extinguishing agent has excellent catalytic activity and structural stability, which is different from the reported dry powder fire extinguishing agent. The coupled fire extinguishing agent has both fire extinguishing function and can achieve carbon monoxide removal, without the factors of additional introduction of ligands leading to increased costs and unstable ligand structure leading to poor cyclic stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present application can be better understood by referring to the description given below in conjunction with the accompanying drawings. The accompanying drawings, together with the following detailed description, are included in this specification and form a part of this specification, and are used to further illustrate the preferred embodiments of the present application and explain the principles and advantages of the present application.

[0022] in:

[0023] Figure 1 This is a graph of carbon monoxide concentration. DETAILED DESCRIPTION

[0024] The present application is further described below by way of examples, but the present application is not limited to the scope of the examples. The experimental methods without specific conditions in the following examples are selected according to conventional methods and conditions, or according to the product instructions.

[0025] Unless otherwise specified, the experimental methods used in the following examples are conventional methods.

[0026] The raw materials in the following examples are all commercially available.

[0027] Example 1

[0028] A coupled fire extinguishing agent capable of extinguishing fire in a limited space and removing carbon monoxide in a fire scene, wherein the raw materials thereof include the following components based on 100 parts: 75 parts of a fire extinguishing base material, 15 parts of a manganese oxide molecular sieve, 5 parts of a lubricant, and 5 parts of a moisture-proof agent.

[0029] The components in the ingredients are fully physically mixed, ground into granules / powders, and then sieved. The sieved catalyst can be in the form of 1nm-1mm particles or powders, including but not limited to fine powders of 1-100 microns and coarse powders of 100-1000 microns. According to the existing dry powder fire extinguishing agent particle size (20um-60um), they are mixed evenly in proportion and dried, and the moisture content meets the requirements of the specification ("Dry Powder Fire Extinguishing Agent" GB4066-2017).

[0030] Effect Example 1

[0031] A simulated fire scene was set up to simulate the fire of the foam board in the combustion box. The coupled fire extinguishing agent was sprayed after the foam was ignited and burned for five minutes. The consistency and repeatability of the experimental conditions were ensured during the experiment.

[0032] Five minutes after the fire started, the coupled fire extinguishing agent added in Example 1 was sprayed at the root of the flame, with a dosage of 2.5 kg. The time from pressing to extinguishing the open flame was 6 seconds, 6 seconds, and 5 seconds respectively. The average time to extinguish the open flame was 5.3 seconds, which met the specification of 8-9 seconds for a 2-3 kg fire extinguisher, and met the requirement of extinguishing the open flame before the end of the spraying.

[0033] Effect Example 2

[0034] A simulated fire scene was set up to simulate the fire of the foam board in the combustion box. 1000g of foam was sprayed with the coupled fire extinguishing agent when the combustion was stable for 10 seconds. The change parameters of the carbon monoxide concentration in the combustion box were recorded from the beginning of spraying (0 seconds). The consistency and repeatability of the experimental conditions were ensured during the experiment.

[0035] The parameters of carbon monoxide concentration change in the combustion box are shown in Table 1 and Figure 1 .

[0036] time Carbon monoxide concentration 0 seconds 100ppm 20 seconds 8ppm 40 seconds 4ppm 60 seconds 3ppm 80 seconds 3ppm 100 seconds 3ppm 120 seconds 3ppm

[0037] From Table 1 and Figure 1 It can be seen that the product prepared in the embodiment of the present application can effectively adsorb carbon monoxide, and can continue to adsorb stably over time, and achieve the optimal adsorption effect within 60 seconds.

[0038] Finally, it should be noted that in this application, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0039] Although the present application has been disclosed above through the description of the specific embodiments of the present application, it should be understood that those skilled in the art can design various modifications, improvements or equivalents to the present application within the spirit and scope of the attached scheme. These modifications, improvements or equivalents should also be considered to be included in the scope of protection claimed in the present application.

Claims

1. A coupled fire extinguishing agent capable of extinguishing fire in a limited space and removing carbon monoxide from a fire scene, characterized in that: Based on 100 parts, the raw materials include the following components: 75-80 parts of fire extinguishing base material, 12-15 parts of manganese oxide molecular sieve, 5-8 parts of lubricant, 4-6 parts of moisture-proof agent, and other types of flame retardants can also be added here; for example, silicon dioxide nanopowder, ammonium polyphosphate, sodium silicate, silica sol, aluminum hydroxide, etc.; Wherein, the fire extinguishing base material includes sodium bicarbonate, ammonium carbonate and ammonium phosphate.

2. The coupled fire extinguishing agent having the function of extinguishing fire in a limited space and removing carbon monoxide from a fire scene as claimed in claim 1, characterized in that: Based on 100 parts, the raw materials include the following components: 75 parts of fire extinguishing base material, 15 parts of manganese oxide molecular sieve, 5 parts of lubricant, and 5 parts of moisture-proof agent.

3. The coupled fire extinguishing agent with the function of extinguishing fire in a limited space and removing carbon monoxide from a fire scene as claimed in claim 1, characterized in that: The manganese oxide molecular sieve is a manganese oxide octahedral molecular sieve, which is prepared by a hydrothermal synthesis method.

4. The coupled fire extinguishing agent having the function of extinguishing fire in a limited space and removing carbon monoxide from a fire scene as claimed in claim 1, characterized in that: The lubricant includes one or more of magnesium stearate, mica powder, and talc powder.

5. The coupled fire extinguishing agent having the function of extinguishing fire in a limited space and removing carbon monoxide from a fire scene as claimed in claim 1, characterized in that: The moisture-proofing agent includes silica gel.

6. A method for preparing a coupled fire extinguishing agent capable of extinguishing fire in a limited space and removing carbon monoxide from a fire scene, characterized in that: include: The components are mixed according to the above ratio, granulated, sieved to obtain powder, and dried to obtain the product.

7. The method for preparing a coupled fire extinguishing agent capable of extinguishing fire in a limited space and removing carbon monoxide from a fire scene as claimed in claim 6, characterized in that: The sieving is granular or fine powder; Wherein, the particle size of the screening is 10 μm or 30-60 μm.

8. The method for preparing a coupled fire extinguishing agent capable of extinguishing fire in a limited space and removing carbon monoxide from a fire scene as claimed in claim 6, characterized in that: The mass ratio of sodium bicarbonate, ammonium carbonate and ammonium phosphate in the fire extinguishing base material is 1:(1-2):(1-2).

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