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Carbon dioxide hydrate extinguishant and application thereof

A technology of carbon dioxide and hydrate, which is applied in the direction of fire prevention equipment, etc., can solve the problems of high cost and low efficiency, and achieve the effects of delaying loss and reducing the temperature of the combustion zone

Active Publication Date: 2012-11-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of low efficiency and high cost of the existing fire extinguishing agents, and propose a new type of environmentally friendly fire extinguishing agent - carbon dioxide hydrate fire extinguishing agent, which is produced by carbon dioxide gas and water under high pressure and low temperature conditions, and is produced in a low temperature environment. Grinding and sieving into crystalline hydrate powder with a certain particle size, in which carbon dioxide molecules are wrapped in a cage lattice formed by water molecules

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Under the conditions of pressure 2.5 MPa and temperature 1 °C, carbon dioxide hydrate was synthesized in a high-pressure stirred reactor with an effective volume of 1 L, and then the hydrate was taken out, and it was ground into a solid powder in a cold storage at -15 °C, and filtered through a 35-mesh sieve. The hydrate powder with a particle size of less than 0.5 mm was screened out to obtain the carbon dioxide hydrate fire extinguishing agent. The fire extinguishing agent was evenly sprayed in the burning alcohol, and it was found that the fire extinguishing agent powder decomposed rapidly on the surface of the alcohol solution to release carbon dioxide gas, the burning area of ​​the alcohol gradually shrank, and the flame quickly extinguished within 30 s.

Embodiment 2

[0020] Under the conditions of pressure 3 MPa and temperature 1 °C, carbon dioxide hydrate was synthesized in a high-pressure stirred reactor with an effective volume of 1 L, and then the hydrate was taken out, ground into solid powder in a freezer at -15 °C, and filtered through a 35-mesh sieve. The hydrate powder with a particle size of less than 0.5 mm was screened out to obtain the carbon dioxide hydrate fire extinguishing agent. The fire extinguishing agent was evenly sprayed in the burning gasoline, and it was found that the fire extinguishing agent powder decomposed rapidly on the surface of the gasoline solution to release carbon dioxide gas, the combustion area of ​​gasoline gradually shrunk, and the flame quickly extinguished within 30 s.

Embodiment 3

[0022] Under the conditions of pressure 4 MPa and temperature 1 °C, carbon dioxide hydrate was synthesized in a high-pressure stirred reactor with an effective volume of 1 L, then the hydrate was taken out, and it was ground into solid powder in a cold storage at -15 °C, and filtered through a 35-mesh sieve. The hydrate powder with a particle size of less than 0.5 mm was screened out to obtain the carbon dioxide hydrate fire extinguishing agent. The above-mentioned fire extinguishing agent was evenly sprayed on the burning wooden building materials. It was found that the fire extinguishing agent powder decomposed rapidly on the surface of the building materials and released carbon dioxide gas.

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Abstract

The invention discloses a carbon dioxide hydrate extinguishant and application thereof. Carbon dioxide gas reacts with water or dry water under the pressure of 0.5-5MPa and at the temperature of -10-15 DEG C to generate carbon dioxide hydrate, and the carbon dioxide hydrate is grinded and screened into carbon dioxide hydrate powder with the grain size smaller than 1.0mm at the temperature below -10 DEG C, so that the extinguishant is prepared. When the hydrate extinguishant is used for extinguishing fire, the hydrate powder covers the surface of combustible, contact of the combustible and air can be decreased, the temperature of a combustion area can be reduced by means of decomposition and heat absorption, ambient air can be combusted when released carbon dioxide is diluted, the combustible can be cooled and covered by released water, and accordingly, the fire is extinguished. The carbon dioxide hydrate extinguishant is an efficient extinguishant, and has the advantages of low cost, cleanness, environmental protection and rapidness in fire extinguishing.

Description

technical field [0001] The invention relates to a preparation method of a fire extinguishing agent, in particular to a hydrate fire extinguishing agent and its application. Background technique [0002] Carbon dioxide hydrate is a non-stoichiometric enveloping cage compound formed by carbon dioxide gas and water under high pressure and low temperature conditions. Gas molecules are wrapped in cage lattices formed by water molecules. A unit volume of hydrate can store 160-180 volumes of gas under standard conditions. As an environmentally friendly new solidification technology, carbon dioxide hydrate generation technology has broad application prospects in industrial fields such as seawater desalination, sewage treatment, carbon dioxide capture, and displacement mining of natural gas hydrate. [0003] The reverse process of carbon dioxide hydrate formation is a violent endothermic decomposition process, and its decomposition enthalpy is about 500 kJ / kg, which is larger than t...

Claims

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Application Information

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IPC IPC(8): A62D1/06
Inventor 樊栓狮杨亮郎雪梅王燕鸿陈立宇陈哲韩孙丽妃
Owner SOUTH CHINA UNIV OF TECH
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