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Load-type dry powder extinguishing agent, and preparation method thereof

A dry powder fire extinguishing agent, load-type technology, which is applied in fire protection equipment and other directions, can solve the problems of increasing the preparation cost of powder fire extinguishing agent, complicated preparation process, large energy consumption, etc., and achieves the simple and easy operation of the preparation method, rapid decomposition, and energy consumption. small effect

Inactive Publication Date: 2013-06-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of the 13X molecular sieve used in the preparation process is relatively complicated, and the cost of the commodity is relatively high, and it adopts vacuum freeze-drying. This drying method requires high equipment and consumes a lot of energy, which in turn increases the cost of powder fire extinguishing agent preparation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Roast 100g of pseudo-boehmite in a muffle furnace at 500°C for 4h at a heating rate of 100°C / h. After firing, γ-Al 2 o 3 . Prepare 300ml of 50% alcohol solution, dissolve 13.5g KHCO 3 , the γ-Al 2 o 3 The powder is added to the potassium bicarbonate solution, impregnated with saturation, and vacuum-dried at 40°C for 10 hours, then 1.5g of light calcium carbonate and 3.5g of talcum powder are added to the vacuum-dried powder, and mixed evenly to obtain the loaded Type dry powder fire extinguishing agent.

[0027] This composite powder 90g is packed in the powder storage tank of 0.8L, is pressurized to 0.5MPa, is sprayed on the absolute alcohol flame (central fire and corner fire) of the oil pan diameter of 15cm on the double oil pan (center fire and corner fire), and the fire extinguishing time is 4.5 s (center fire) and 15.8s (corner fire), the amount of fire extinguishing agent is 51.4g (all extinguished). Under the same experimental conditions, when ordinary BC ...

Embodiment 2

[0029] Roast 100g of pseudo-boehmite in a muffle furnace at 500°C for 4h at a heating rate of 100°C / h. After firing, γ-Al 2 o 3 . Prepare 300ml of 30% alcohol solution, dissolve 28.8g KHCO 3 , the γ-Al 2 o 3 The powder is added to the potassium bicarbonate solution, impregnated with saturation, and vacuum-dried at 40°C for 10 hours, then 2.5g of light calcium carbonate and 3g of talcum powder are added to the vacuum-dried powder, and mixed evenly to obtain the loaded Dry powder fire extinguishing agent.

[0030] This composite powder 90g is packed in the powder storage tank of 0.8L, is pressurized to 0.5MPa, is sprayed on the double oil pan absolute alcohol flame (center fire and corner fire) that oil pan diameter is 15cm, and fire extinguishing time is 2.2 s (center fire) and 11.5s (corner fire), the amount of fire extinguishing agent is 37.0g (all extinguished). Under the same experimental conditions, when ordinary BC dry powder is used as the fire extinguishing agent,...

Embodiment 3

[0032] Roast 100g of pseudo-boehmite in a muffle furnace at 500°C for 4h at a heating rate of 100°C / h. After firing, γ-Al 2 o 3 . Prepare 300ml of 30% alcohol solution, dissolve 30g KCl, and γ-Al 2 o 3 The powder is added to the potassium chloride solution, impregnated with saturation, and vacuum-dried at 80°C for 8 hours, then 2g of light calcium carbonate and 2.5g of talcum powder are added to the vacuum-dried powder, and mixed evenly to obtain the loaded Dry powder fire extinguishing agent.

[0033]This composite powder 90g is packed in the powder storage tank of 0.8L, is pressurized to 0.5MPa, is sprayed on the anhydrous alcohol flame (central fire and corner fire) of double oil pan with oil pan diameter 15cm (center fire and corner fire), and fire extinguishing time is 2.0 s (center fire) and 10.0s (corner fire), the amount of fire extinguishing agent is 31.9g (all extinguished). Under the same experimental conditions, when ordinary BC dry powder is used as the fire ...

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PUM

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Abstract

The invention belongs to the technical field of powder-based extinguishing agent, and especially relates to a load-type dry powder extinguishing agent and a preparation method thereof. The method adopts a technical scheme that: the load-type dry powder extinguishing agent is composed of, by mass, 65-80% of a porous carrier, 10.5-30% of a potassium salt, 1.5-3.0% of light calcium carbonate, and 2.0-6.5% of talcum powder. The extinguishing agent and the preparation method have the advantages that: the high-efficiency extinguishing powder-based medium potassium salt is loaded in relatively cheap porous carrier. The loaded potassium salt particles has the advantages of small particle size, large specific surface area, large contact area with flame, and more rapid decomposition, such that the extinguishing performance can be better developed. Also, the porous carrier has low density and high fluidity, such that low density and high fluidity are provided for the composite powder. Therefore, the micro-particles can easily be ejected to a flame area, and can stay for a longer period of time at the flame area. Therefore, the high extinguishing performance can be shown. The preparation method provided by the invention has the advantages of simple method, easy operation, low equipment requirement, and low energy consumption.

Description

technical field [0001] The invention belongs to the technical field of powder-based fire extinguishing agents, in particular to a loaded dry powder fire extinguishing agent and a preparation method thereof. Background technique [0002] Since the advent of Halon1211, 1301 and 2402, three gaseous fire extinguishing agents have been widely used all over the world because of their low fire extinguishing concentration, high fire extinguishing efficiency, and non-conductive properties. In the middle of the decade, the application of halon fire suppression system reached its peak. However, it seriously damages the ozone layer and has been eliminated by the United Nations Environment Program within a specified time limit. The Chinese government has stipulated that the production, use and sale of halon series fire extinguishing agents will be prohibited from December 31, 2005. [0003] The existing halon substitute products mainly include halogenated hydrocarbon fire extinguishing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D1/00
Inventor 刘义李菲赵东风
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)