Control method of ABC dry powder grain size distribution content

A technology of dry powder fire extinguishing agent and particle size distribution, which is applied in fire prevention equipment, phosphorus oxyacid, granulation in rotating disk/pot, etc., which can solve the problem of increasing production costs, fire extinguishing agent can't play a role in extinguishing fire, and fire extinguishing efficiency can't meet the requirements and other issues, to achieve the effect of improving fire extinguishing efficiency, saving raw material costs, and eliminating human operation factors

Active Publication Date: 2009-07-29
NINGBO NENGLIN FIRE FIGHTING EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, we found that the "chemical composition content" and "particle size distribution" of many products meet the requirements, but the fire extinguishing efficiency of Class A, B, and C does not meet the requirements. A, B, C fires and live equipment fires increase production costs, and there is still a certain gap in performance compared with fire extinguishing agent products produced in advanced countries in the world

Method used

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  • Control method of ABC dry powder grain size distribution content
  • Control method of ABC dry powder grain size distribution content
  • Control method of ABC dry powder grain size distribution content

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 40% ABC dry powder fire extinguishing agent, product particle size distribution "content" control method

[0022] (1) "Particle size distribution" control of ammonium dihydrogen phosphate pulverized material: a built-in graded ultrafine pulverizer is adopted, the host is continuously variable, and the classifier and feeder adopt electromagnetic variable speed. The frequency of the host is 50Hz, and the speed of the classifier is 200r / min, feeder speed 1000r / min, first crush the ammonium dihydrogen phosphate raw material, and then test the "particle size distribution" of the ammonium dihydrogen phosphate crushed material according to the national standard GB4066.1-2004 article 5.7, the test results are: in 0.125 1.3% in mm standard sieve; 12.0% in 0.063mm standard sieve; 17.1% in 0.040mm standard sieve; 69.6% in chassis, see Table 1.

[0023] (2) Selection of other raw materials and control of "particle size distribution": choose hydrophobic white carbon black, mica pow...

Embodiment 2

[0047] 70% ABC dry powder fire extinguishing agent, control method of product particle size distribution "content"

[0048] (1) "Particle size distribution" control of ammonium dihydrogen phosphate pulverized material: a built-in graded ultrafine pulverizer is adopted, the host is continuously variable, and the classifier and feeder adopt electromagnetic variable speed, according to the host frequency 48Hz, classifier speed 250r / Min, the speed of the feeder is 900r / min, first crush the ammonium dihydrogen phosphate raw material, and then test the particle size distribution of the crushed ammonium dihydrogen phosphate according to the national standard GB4066.1-2004 article 5.7; the test results are: 1.0% in the middle; 17.5% in the 0.063mm standard sieve; 18.0% in the 0.040mm standard sieve; 63.5% in the chassis, see Table 3.

[0049] (2) Other raw material selection and particle size distribution control: choose hydrophobic white carbon black, mica powder, activated clay, an...

Embodiment 3

[0056] 90% ABC dry powder fire extinguishing agent, control method of product particle size distribution "content"

[0057] (1) "Particle size distribution" control of ammonium dihydrogen phosphate pulverized material: a built-in graded ultrafine pulverizer is adopted, the host is continuously variable, and the classifier and feeder adopt electromagnetic variable speed. The frequency of the host is 45Hz, and the speed of the classifier is 300r / min, feeder speed 800r / min, first crush the ammonium dihydrogen phosphate raw material, and then test the particle size distribution of the crushed ammonium dihydrogen phosphate. The test results are: 1.6% in 0.125mm standard sieve; 18.4% in 0.063mm standard sieve;

[0058] 20.0% in the standard sieve; 60.0% in the chassis, see Table 5.

[0059] (2) Selection of other raw materials and control of "particle size distribution": choose hydrophobic white carbon black, mica powder, activated clay, and talcum powder as auxiliary filling mate...

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Abstract

The invention discloses a method for controlling the particle size distribution and content of an ABC powder extinguishing agent, which comprises the following steps of: (1) firstly, crushing diammonium phosphate with an LF concealed and stepped super micro mill and controlling the 'particle size distribution' of the diammonium phosphate; secondly, controlling the 'particle size distribution' of other materials in 0.125 millimeter, 0.063 millimeter and 0.040 millimeter sieves and an underpan; and finally, controlling the 'particle size distribution' and 'content' of the product. The ABC powder extinguishing agent prepared by the method can effectively extinguish class A, B and C fires and electric equipment fires, has a class A, B, C fire extinguishing efficiency which is 1 to 3 times of that of the prior ABC powder extinguishing agent, saves raw material cost, improves extinguishing efficiency and can match products made in advanced countries across the world in performance.

Description

technical field [0001] The invention relates to the field of ABC dry powder fire extinguishing agent with ammonium dihydrogen phosphate as the main fire extinguishing raw material, in particular to a method for controlling the particle size distribution content of the ABC dry powder fire extinguishing agent. Background technique [0002] With the elimination of haloalkane fire extinguishing agents and the gradual restriction of the use of PFOS fluorosurfactants for foam fire extinguishing agents (Stockholm Convention), ABC dry powder fire extinguishing agents are widely used due to their simple production process, readily available raw materials, good fire extinguishing performance, and wide application range. It has developed rapidly and is one of the most widely used fire extinguishing agents at home and abroad. [0003] National standard GB4066.2-2004 and European standard EN615-1994, the "chemical composition content" and "particle size distribution" of ABC dry powder fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D1/00C01B25/28B01J2/14
Inventor 王仁国王善明张琦
Owner NINGBO NENGLIN FIRE FIGHTING EQUIP
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