A composite anti-explosion agent for suppressing the explosion of low-concentration coal-bed methane and its preparation method

A composite type, coalbed methane technology, applied in mining equipment, earth square drilling, dust prevention, etc., can solve the problems of low explosion suppression efficiency, poor explosion suppression performance, etc., achieve good explosion suppression effect, simple preparation, and less dosage Effect

Active Publication Date: 2020-01-14
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Although the above-mentioned prior art has done targeted research to detonation suppressant, it also has many defects, such as low detonation suppression efficiency, relatively poor detonation suppression performance, etc.

Method used

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  • A composite anti-explosion agent for suppressing the explosion of low-concentration coal-bed methane and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The raw material formula of the composite antiknock agent for suppressing the explosion of low-concentration coalbed methane is: by weight, 24 parts of disodium hydrogen phosphate dodecahydrate, 16 parts of dipotassium hydrogen phosphate trihydrate, 20 parts of magnesium hydrogen carbonate, hydrogen carbonate 18 parts of ammonium, 17 parts of calcium silicate, 5 parts of talcum powder.

[0048] The specific steps of the preparation method are:

[0049] The first step, the raw materials disodium hydrogen phosphate dodecahydrate, dipotassium hydrogen phosphate trihydrate, magnesium bicarbonate, ammonium bicarbonate and calcium silicate are respectively ground into powder;

[0050] In the second step, pass the talc powder and the powder ground in the first step through a 200-mesh sieve, collect the sieved powder, and set aside, and add the unsifted powder and the raw material with a particle size greater than 75 μm to the milling powder respectively. machine for grinding;...

Embodiment 2

[0056] The raw material formula of the composite antiknock agent for suppressing the explosion of low-concentration coalbed methane is: by weight, 26 parts of disodium hydrogen phosphate dodecahydrate, 15 parts of dipotassium hydrogen phosphate trihydrate, 20 parts of magnesium bicarbonate, hydrogen carbonate Ammonium 17 parts, calcium silicate 16 parts, talcum powder 6 parts.

[0057] The preparation method is the same as in Example 1.

[0058] The using method of composite antiknock agent is the same as embodiment 1.

Embodiment 3

[0060] The raw material formula of the composite antiknock agent for suppressing the explosion of low-concentration coalbed methane is: by weight, 28 parts of disodium hydrogen phosphate dodecahydrate, 15 parts of dipotassium hydrogen phosphate trihydrate, 18 parts of magnesium bicarbonate, hydrogen carbonate Ammonium 17 parts, calcium silicate 15 parts, talcum powder 7 parts.

[0061] The preparation method is the same as in Example 1.

[0062] The using method of composite antiknock agent is the same as embodiment 1.

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Abstract

The present application belongs to the technical field of explosion suppression of coal-bed gas, and discloses a compound explosion suppressor for suppressing explosion of a low-concentration coalbed gas and a preparation method thereof. The preparation method of the compound explosion suppressor comprises: first, separately grinding disodium hydrogen phosphate dodecahydrate, dipotassium hydrogen phosphate trihydrate, magnesium bicarbonate, ammonium bicarbonate and calcium silicate into powders; then separately passing a talcum powder and the ground powders through a 200-mesh screen and collecting the screened powders for later use; separately weighing the screened powders at a certain ratio, adding the same into a dry powder blender and thoroughly mixing same until homogeneous to obtain a mixed powder; and finally, drying the mixed powder by heating from room temperature to 40°C at a heating rate of 15°C / h and performing constant-temperature drying to obtain the compound explosion suppressor. The various powder materials of the compound explosion suppressor have a synergistic suppressive effect, such that coal-bed gas explosions cannot continue to occur, thus achieving the purpose of suppressing an explosion of a low-concentration coal-bed gas. The compound explosion suppressor of the present invention performs well in suppressing explosions.

Description

technical field [0001] The invention relates to the technical field of explosion suppression of coal bed gas, in particular to an explosion suppression agent and a preparation method of the explosion suppression agent. Background technique [0002] Coalbed methane is an unconventional natural gas resource associated with coal, and its main component is methane. In my country, the reserves of low-concentration coalbed methane account for more than 60% of the total reserves, and it accounts for a large proportion in the extraction of coalbed methane in coal mines. However, due to the low volume concentration of methane in low-concentration coalbed methane, it is easy to fall within its explosion limit range Therefore, there is a risk of explosion during the extraction and pipeline transportation of low-concentration coalbed methane, which seriously threatens the safety of low-concentration coalbed methane drainage and pipeline transportation. Explosion suppression technology i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F5/00E21F5/12
CPCE21F5/00E21F5/12
Inventor 孟祥豹王俊峰马雪松肖琴刘博
Owner SHANDONG UNIV OF SCI & TECH
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