Compound explosive suppressant and preparation method thereof for inhibiting explosion of low-concentration coalbed methane

A composite type, coalbed methane technology, applied in mining equipment, earthwork drilling, safety devices, etc., can solve the problems of poor explosion suppression performance and low explosion suppression efficiency, achieve good heat insulation effect, reduce heat radiation, and improve Dispersion effect

Active Publication Date: 2019-07-05
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0007] Although the above-mentioned prior art has done targeted research to detonation suppressant, it also has ma

Method used

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  • Compound explosive suppressant and preparation method thereof for inhibiting explosion of low-concentration coalbed methane

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 invention discloses a compound explosive suppressant and a preparation method thereof for suppressing explosion of low-concentration coalbed methane, and belongs to the technical field of explosion suppression of the coalbed methane. The preparation method includes the steps that firstly, sodium phosphate hydrogen dibasic decahydrate, potassium phosphate hydrogen trihydrate, bicarbonate magnesium, ammonium bicarbonate and calcium silicate are ground into powder respectively; then talc powder and ground powder ate sieved with 200 mesh, and the sieved powder is collected for standby application; the sieved powder is weighed separately according to a certain proportion and added to a dry powder mixer to mix thoroughly and evenly; and finally, the mixed powder is dried, the drying temperature is raised from the room temperature to 40 DEG C at the heating rate of 15 DEG C/ h, and after constant temperature drying, the mixture is obtained. Through comprehensive suppressing of various powder materials, explosion of the coalbed methane cannot continue, and finally the purpose of suppressing explosion of low-concentration coalbed methane is finally achieved. The compound explosive suppressant has excellent explosion suppression performance.

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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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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