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Method for preparing powder fire extinguishing agent compounded with rare earth elements by supersonic airflow pulverization

A technology of supersonic air flow and rare earth elements, which is applied in fire prevention equipment and other directions, can solve the problem of less application of powder fire extinguishing agent, achieve rapid and uniform compounding, reduce particle size, and improve fire extinguishing performance

Active Publication Date: 2021-12-24
CIVIL AVIATION UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Supersonic airflow pulverization technology is a new pulverization engineering technology developed with modern high technology and new material industry. Less, especially for powder fire extinguishing agents containing multiple composite materials

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0018] The supersonic jet pulverization method provided by the present embodiment prepares the powder fire extinguishing agent method of rare earth element composite, and comprises the following steps carried out in sequence:

[0019] (1) Mix ammonium dihydrogen phosphate and lanthanum carbonate uniformly according to the mass ratio of 96:4, and then use a supersonic jet mill to pulverize and refine to make ultrafine powder; wherein the air pressure of the supersonic jet mill is 0.75 MPa;

[0020] (2) Mix the above-mentioned superfine powder and bentonite according to the mass ratio of 85:15 to make a mixture, then add emulsified silicone oil accounting for 1% of the total mixture and mix evenly, and then carry out the surface treatment at 60°C. Hydrophobic treatment for 8 hours, and finally drying at 100°C for 2 hours to obtain a high-efficiency ultrafine powder fire extinguishing agent.

[0021] By cup burner (Cup-burner) test, the high-efficiency superfine powder fire exti...

Embodiment 2

[0023] The supersonic jet pulverization method provided by the present embodiment prepares the powder fire extinguishing agent method of rare earth element composite, and comprises the following steps carried out in order:

[0024] (1) Mix ammonium monohydrogen phosphate and cerium oxide uniformly according to the mass ratio of 93:7, and then use a supersonic jet mill to pulverize and refine to make ultrafine powder; wherein the air pressure of the supersonic jet mill is 0.75 MPa;

[0025] (2) Mix the above ultrafine powder and zeolite according to the mass ratio of 85:15 to make a mixture, then add emulsified silicone oil accounting for 1% of the total mixture and mix evenly, and then carry out surface hydrophobic treatment at 60°C 8 hours, and finally dried at 100°C for 2 hours to obtain a high-efficiency ultrafine powder fire extinguishing agent.

[0026] By cup burner (Cup-burner) test, the high-efficiency superfine powder fire extinguishing agent provided by the present ...

Embodiment 3

[0028] The supersonic jet pulverization method provided by the present embodiment prepares the powder fire extinguishing agent method of rare earth element composite, and comprises the following steps carried out in order:

[0029] (1) Mix potassium bicarbonate and yttrium phosphate uniformly according to the mass ratio of 95:5, and then use a supersonic airflow mill to pulverize and refine to make ultrafine powder; wherein the air pressure of the supersonic airflow mill is 0.75MPa ;

[0030] (2) Mix the above ultrafine powder and perlite according to the mass ratio of 85:15 to make a mixture, then add emulsified silicone oil accounting for 1% of the total mixture and mix evenly, and then perform surface hydrophobicity at 60°C Treat for 8 hours, and finally dry at 100°C for 2 hours to obtain a high-efficiency ultrafine powder fire extinguishing agent.

[0031] By cup burner (Cup-burner) test, the high-efficiency superfine powder fire extinguishing agent provided by the presen...

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Abstract

The invention provides a method for preparing a powder fire extinguishing agent compounded with rare earth elements by a supersonic airflow pulverization method. It should use the supersonic airflow pulverization method to mix and refine the rare earth element compound and the powder fire extinguishing agent base material, and then use the emulsified silicone oil to modify the surface, so as to obtain a high-efficiency ultrafine powder fire extinguishing agent. This method utilizes the high-efficiency fire extinguishing performance of rare earth elements to further improve the fire extinguishing performance of the composite fire extinguishing agent, and uses the supersonic jet pulverization method to simultaneously refine the rare earth element compound and the powder fire extinguishing agent base material, which can not only reduce the particle size of the raw materials, It can also make the raw materials of the fire extinguishing agent mix more evenly; in addition, due to the active ingredients of the fire extinguishing agent and the rare earth components under the action of high-speed airflow, the surface will produce a fresh surface with high activity. Components and rare earth components produce chemical bonding or physical adsorption, so that the composite effect of the effective components of the fire extinguishing agent and rare earth components is better.

Description

technical field [0001] The invention belongs to the technical field of preparation of superfine powder fire extinguishing agent, in particular to a method for preparing a powder fire extinguishing agent compounded with rare earth elements by a supersonic jet pulverization method. Background technique [0002] Due to its excellent characteristics of high fire extinguishing efficiency and low ODP and GWP values, powder fire extinguishing agent is considered to be one of the potential substitutes for "halon" fire extinguishing agent. At present, the active ingredients of powder fire extinguishing agents are mainly phosphate and carbonate. Although the fire extinguishing performance of this type of fire extinguishing agent can be improved to a certain extent by refining the particle size of the fire extinguishing agent, for ultrafine powder fire extinguishing agents (especially granular smaller than the limit particle size of the fire extinguishing agent), its fire extinguishing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D1/00
CPCA62D1/0014
Inventor 周晓猛李秀涛
Owner CIVIL AVIATION UNIV OF CHINA
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