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Carbon-free gas hydrate fire extinguishing agent and preparation method thereof

A technology of gas hydrate and fire extinguishing agent, which is applied in the direction of fire prevention equipment, etc., can solve the problems of strong greenhouse effect, poor adhesion of water system fire extinguishing agent, low-carbon inert gas fire extinguishing agent cannot be reduced, etc., and achieves the effect of low price and convenient preparation and use

Inactive Publication Date: 2015-08-12
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a carbon-free gas hydrate fire extinguishing agent and a preparation method thereof, which solves the problems in the prior art The pure carbon dioxide fire extinguishing agent has a strong greenhouse effect, the water-based fire extinguishing agent has poor adhesion, and the low-carbon inert gas fire extinguishing agent cannot reduce the temperature of the combustion zone.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Under the conditions of temperature 1 °C and pressure 17 MPa, nitrogen hydrate was statically synthesized with sodium dodecyl sulfate solution in a high-pressure reactor with an effective volume of 2 L, and then the hydrate was taken out and crushed into solid powder, and sieve the hydrate powder with a particle size of less than 0.5 mm on a 35-mesh sieve to obtain a nitrogen hydrate fire extinguishing agent. The fire extinguishing agent was evenly sprayed in the burning alcohol pool, and it was found that the fire extinguishing agent powder decomposed rapidly on the surface of the alcohol to release nitrogen gas, the flame of alcohol burning gradually became smaller, and the flame was quickly extinguished within 25 s.

Embodiment 2

[0028] Under the conditions of temperature 3 °C and pressure 11 MPa, argon hydrate was statically synthesized with sodium dodecyl sulfate solution in a high-pressure reactor with an effective volume of 2 L, and then the hydrate was taken out and ground in a cold storage at -15 °C into a solid powder, and sieve the hydrate powder with a particle size of less than 0.5 mm on a 35-mesh sieve to obtain an argon hydrate fire extinguishing agent. The fire extinguishing agent was evenly sprayed in the burning alcohol pool, and it was found that the fire extinguishing agent powder decomposed rapidly on the surface of alcohol to release argon gas, and the flame of alcohol burning gradually became smaller, and the flame was quickly extinguished within 15 s.

Embodiment 3

[0030] Under the conditions of temperature 2 ℃ and pressure 13 MPa, nitrogen / argon gas mixture (volume ratio 1:1) hydrate was statically synthesized with dry water in a high-pressure reactor with an effective volume of 2 L, and then the hydrate was taken out and stored at -15 ℃ Grind it into a solid powder in a cold storage, and screen the hydrate powder with a particle size of less than 0.5 mm on a 35-mesh sieve to obtain a nitrogen / argon hydrate fire extinguishing agent. The fire extinguishing agent was evenly sprayed in the burning alcohol pool, and it was found that the fire extinguishing agent powder decomposed rapidly on the surface of alcohol to release gas, the flame of alcohol burning gradually became smaller, and the flame was quickly extinguished within 20 s.

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Abstract

The invention relates to a carbon-free gas hydrate fire extinguishing agent. The fire extinguishing agent is a solid hydrate powder generated from an inert gas and a water mixture at a low temperature under a high pressure, the inert gas is anyone of nitrogen and argon, or a gas obtained by mixing nitrogen with argon according to an arbitrary ratio, and the water mixture can be water or an aqueous solution or dry water or a dry solution or ice. The invention also provides a preparation method of the fire extinguishing agent. The method comprises the following steps: reacting the inert gas with water or the aqueous solution or the dry water or the dry solution or ice at -10-10DEG C under 7-20MPa to generate a gas hydrate, crushing in below -10DEG C environment, and screening to form the hydrate powder with the particle size of below 1.0mm. The carbon-free gas hydrate fire extinguishing agent has the advantages of realization of zero carbon discharge, simple preparation process, low price, and rapid fire extinguishing, and is a clean and efficient fire extinguishing agent.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a high-efficiency clean fire extinguishing agent, specifically a carbon-free gas hydrate fire extinguishing agent and a preparation method thereof. Background technique [0002] In the fire extinguishing system, nitrogen, carbon dioxide, argon or their mixtures are called inert gases, see GB20128-2006 "Inert Gas Fire Extinguishing Agents" for details. [0003] Gas hydrate is a non-stoichiometric enveloping crystalline compound formed by gas and water under low temperature and high pressure conditions. Gas molecules are wrapped in a cage lattice formed by water molecules. Under certain temperature and pressure conditions, hydrates can realize the solidification storage of any one or several gases. A unit volume of gas hydrate can store 160-180 volumes of gas under standard conditions. [0004] The reverse process of hydrate formation in carbon-free gases (such as nit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D1/06
CPCA62D1/06
Inventor 杨亮杨梦谢育博刘道平崔国民
Owner UNIV OF SHANGHAI FOR SCI & TECH
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