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Preparation method of gel dry water fire extinguishing agent

A technology of fire extinguishing agent and dry water, which is applied in the direction of fire prevention equipment, etc., can solve the problems of suffocation hazards for operators, environmental pollution, and bulky equipment, etc., and achieve the effects of good fluidity and dispersibility, high melting point, and preventing molten droplets

Pending Publication Date: 2020-04-24
李宏伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The technical problem to be solved by the present invention: the method of isolating oxygen fire extinguishing by the gas fire extinguishing agent will cause suffocation danger to the operator, and the dry powder fire extinguishing agent has the danger of pressurized storage, and the dry powder is likely to cause dust to fly and pollute the surrounding environment. The fire extinguishing agent needs to be equipped with a condensation or heat dissipation system, the equipment is bulky, and the operation is complicated. A method for preparing a gel dry water fire extinguishing agent is provided.

Method used

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  • Preparation method of gel dry water fire extinguishing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In terms of parts by weight, weigh 30 parts of nano-silica powder and 12 parts of carbon powder respectively, add the carbon powder to the nano-silica powder, place it in a high-speed mixer, and stir and mix at 800r / min for 12 minutes at room temperature. To obtain mixed powder, put the mixed powder in a tubular atmosphere furnace, feed nitrogen gas at a rate of 120mL / min, raise the temperature to 1600°C at a rate of 20°C / min at room temperature, keep the temperature for calcination for 1~2h, and cool down with the furnace to At room temperature, calcined powder is obtained. Put the calcined powder in a muffle furnace, raise the temperature to 400°C at a rate of 5°C / min at room temperature, keep the temperature for calcination for 30 minutes, and cool down to room temperature with the furnace to obtain nano-silicon nitride powder; then press In terms of parts by weight, weigh 40 parts of nano-silicon nitride powder, 12 parts of hexamethyldisilazane, 8 to 10 parts of stea...

Embodiment 2

[0044] In terms of parts by weight, weigh 35 parts of nano-silica powder and 14 parts of carbon powder respectively, add the carbon powder into the nano-silica powder, place it in a high-speed mixer, stir and mix at 900r / min for 14min at normal temperature, To obtain the mixed powder, place the mixed powder in a tubular atmosphere furnace, feed nitrogen gas at a rate of 140mL / min, raise the temperature to 1700°C at a rate of 20°C / min at room temperature, keep the temperature for calcination for 1.5h, and cool to room temperature with the furnace , to obtain calcined powder, put the calcined powder in a muffle furnace, raise the temperature to 500°C at a heating rate of 5°C / min at room temperature, heat-preserve and calcinate for 35min, and cool to room temperature with the furnace to obtain nano-silicon nitride powder; In terms of parts, weigh 45 parts of nano-silicon nitride powder, 13 parts of hexamethyldisilazane, 9 parts of stearic acid, 4.5 parts of glycerin, 180 parts of ...

Embodiment 3

[0046] In terms of parts by weight, weigh 40 parts of nano-silica powder and 16 parts of carbon powder respectively, add the carbon powder into the nano-silica powder, place in a high-speed mixer, stir and mix at 1000r / min for 16 minutes at normal temperature, To obtain the mixed powder, place the mixed powder in a tubular atmosphere furnace, feed nitrogen gas at a rate of 160mL / min, raise the temperature to 1800°C at a rate of 20°C / min at room temperature, keep the temperature for calcination for 2 hours, and cool to room temperature with the furnace. To obtain calcined powder, place the calcined powder in a muffle furnace, raise the temperature to 600°C at a heating rate of 5°C / min at room temperature, keep the heat for calcination for 40min, and cool to room temperature with the furnace to obtain nano-silicon nitride powder; Counting, weighing 50 parts of nano-silicon nitride powder, 15 parts of hexamethyldisilazane, 10 parts of stearic acid, 5 parts of glycerin, 200 parts o...

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Abstract

The invention relates to a preparation method of a gel dry water fire extinguishing agent, which belongs to the technical field of fire extinguishing materials. The hydrophobic nano silicon nitride powder is used as a raw material; ammonium dihydrogen phosphate, ammonium sulfate, magnesium hydroxide and talcum powder are added; and the gel dry water fire extinguishing agent is prepared; the ammonium dihydrogen phosphate and ammonium sulfate can be decomposed at high temperature; chemical inhibition and side catalysis are carried out on free radicals or active groups generated by fuel in the combustion process, a chain reaction of combustion is interrupted to extinguish fire; the talcum powder is added, so that the stability and the dispersity of the dry water extinguishing agent can be effectively improved; the magnesium hydroxide is decomposed when being heated and absorbs heat on the surface of a comburent; the silicon nitride belongs to an inert substance, is attached to the outsideof the surface of the comburent, prevents the contact between a reactant and a combustion improver, isolates the comburent from oxygen, suffocates and extinguishes the comburent, and the gel dry water fire extinguishing agent has the advantages of favorable dry water flowability, favorable dispersity, no toxicity, no harm, no electricity and no secondary pollution.

Description

technical field [0001] The invention relates to a preparation method of a gel dry water fire extinguishing agent, belonging to the technical field of fire extinguishing materials. Background technique [0002] Fire is currently one of the biggest disasters threatening the loss of people's lives and property. With the improvement of productivity and living standards, the rapid growth of urban population density has greatly increased the risk of fires. The occurrence of some vicious fires not only caused huge casualties and property losses, but also created a lot of panic and confusion. . On the one hand, fire control needs to be contained from the source, and the safety and flame retardancy of buildings and devices should be strengthened, so as to reduce or avoid the occurrence of fire; stage; secondly, having good means of controlling and extinguishing the fire as it spreads. Therefore, a highly efficient, safe and easy-to-operate fire extinguishing agent is in urgent nee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D1/00A62D1/06
CPCA62D1/0064A62D1/06
Inventor 李宏伟
Owner 李宏伟
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