Composite powder fire extinguishing agent and preparation method thereof

A technology of composite powder and fire extinguishing agent, which is applied in the direction of fire prevention equipment, etc., can solve the problems of poor resurgence resistance, low efficiency of free radicals or active groups, fast settling speed, etc., and achieve good resurgence resistance and good fire extinguishing Effect, effect of improving fluidity

Inactive Publication Date: 2012-01-18
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main components of existing common dry powder fire extinguishing agents are usually inorganic salts such as sodium bicarbonate, ammonium dihydrogen phosphate and sodium chloride, which are easy to absorb moisture and agglomerate when placed for a long time, seriously affecting its fire extinguishing performance; in order to improve its moisture-proof performance, now Most of the dry powder fire extinguishing agents are treated with surface siliconization, that is, a layer of silicone oil hydrophobic film is coated on the surface. However, due to

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Embodiment 1: with Mg-Al-OH-CO 3 Composite powder fire extinguishing agent based on layered double hydroxide

[0019] 95g Mg-Al-OH-CO 3 After milling the layered double hydroxide in a ball mill for 60 minutes, dry it at 120°C for 2 hours; take 90 g of the refined powder and put it into a steel cylinder with a pressure resistance of 1.0 MPa or more and a volume of 1.0 L to evacuate to 0.005 MPa , then inject 160ml of BTP liquid, and stir magnetically at a speed of 300 rpm for 12 hours in an ice-water bath at 0°C; then filter out the powder, leave it at room temperature for 6 hours, and then add 1.2g of hard Magnesium fatty acid powder, oscillating the steel cylinder for 30 minutes to make it mix evenly, obtain the composite powder fire extinguishing agent of the present invention.

[0020] As measured by a particle size analyzer, the average particle size of the obtained composite powder fire extinguishing agent powder particles was 8.2 μm.

[0021] The X-ray fluoresc...

Example Embodiment

[0023] Embodiment 2: with Zn-Al-OH-CO 3 Composite powder fire extinguishing agent based on layered double hydroxide

[0024] 100g Zn-Al-OH-CO 3 After milling the layered double hydroxide in a ball mill for 40 minutes, dry it at 120°C for 2 hours; take 90 g of the refined double hydroxide powder and put it into a steel cylinder with a pressure of 1.0 MPa and a volume of 1.0 L to vacuum The density is 0.005MPa, then inject 180ml of BTP liquid, and stir magnetically at a speed of 400 rpm for 16 hours in an ice-salt water bath at -5°C; The magnesium stearate powder with a diameter below 8 μm is stirred to make it evenly mixed to obtain the composite powder fire extinguishing agent of the present invention.

[0025] As measured by a particle size analyzer, the average particle size of the powder particles in the composite powder fire extinguishing agent is 8.4 μm.

[0026] The X-ray fluorescence test shows that the mass content of Br in the composite powder fire extinguishing ag...

Example Embodiment

[0028] Embodiment 3: with Mg-Fe-OH-CO 3 Composite powder fire extinguishing agent based on layered double hydroxide

[0029] 100g Mg-Fe-OH-CO 3 After milling the layered double hydroxide powder in a ball mill for 60 minutes, dry it at 120°C for 2 hours; take 90 g of the refined powder and put it into a steel cylinder with a pressure resistance of 1.0 MPa and a volume of 1.0 L to evacuate to 0.002 MPa, then inject 140ml of BTP liquid, and stir magnetically at a speed of 400 rpm for 18 hours in a water bath at 5°C; Magnesium fatty acid powder vibrated the steel cylinder up and down for 20 minutes to make it evenly mixed to obtain the composite powder fire extinguishing agent of the present invention.

[0030] As measured by a particle size analyzer, the average particle size of the powder particles in the composite powder fire extinguishing agent is 6.2 μm.

[0031] According to the X-ray fluorescence test, the mass content of Br in the sample is 3.4%, indicating that the mas...

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Abstract

The invention discloses a composite powder base fire extinguishing agent and a preparation method thereof, which are characterized in that the vacuum pumping is carried out on 85 to 95 percent of layer double hydroxide with the grain diameter lower than 10mum according to the mass percent of the system to a value lower than 0.01 MPa in a pressure-resistant container, 2-bromine-3, 3, 3-trifluoropropene liquid is filled for soaking the powder, and the materials are stirred for more than 12 hours at a speed of 300 to 600r/min at -5 to 10 DEG C; then, the powder is separated through extraction filtering and is placed for 6 to 10 hours at room temperature, then, 0.8 to 2.2 percent of magnesium stearate with the grain diameter lower than 10mum according to the mass percent of the system is added and is uniformly mixed; the obtained composite powder fire extinguishing agent simultaneously has hydrophobicity and lipophobicity, the moisture-proof performance and the anti-reignition performance are good, the fire extinguishing efficiency is high, the composite powder fire extinguishing agent can be used as the fire extinguishing agent and can also be used as additives of powder extinguishing agents, raw materials have low price and can be easily obtained, the preparation process is simple, and the composite powder fire extinguishing agent is suitable for being used for various fire extinguishers to extinguish various kinds of fire hazards.

Description

technical field [0001] The invention belongs to the technical field of powder fire extinguishing agents, in particular to a composite dry powder fire extinguishing agent and a preparation method thereof. Background technique [0002] Common fire extinguishing agents include gas, dry powder, water and foam. Among these many types of fire extinguishing agents, dry powder fire extinguishing agents have been widely used to fight solid, liquid, flammable gases and other types due to their high fire extinguishing efficiency, safety to the environment and human body, easy storage, and low price. fire, occupies an important position in the field of fire extinguishing agents today. However, the main components of existing common dry powder fire extinguishing agents are usually inorganic salts such as sodium bicarbonate, ammonium dihydrogen phosphate and sodium chloride, which are easy to absorb moisture and agglomerate when placed for a long time, seriously affecting its fire exting...

Claims

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Application Information

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IPC IPC(8): A62D1/00A62D1/06
Inventor 倪小敏郑化桂陶常法
Owner UNIV OF SCI & TECH OF CHINA
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