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Method for determining content of hydrogen sulfide of coal bed

A determination method and technology of hydrogen sulfide, applied in the direction of analyzing materials and instruments, etc., can solve the problems such as the inability to measure the content of hydrogen sulfide

Active Publication Date: 2015-10-07
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method is simple to operate, low in cost and strong in practicability, and solves the problem that the hydrogen sulfide content in coal seams cannot be measured

Method used

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  • Method for determining content of hydrogen sulfide of coal bed
  • Method for determining content of hydrogen sulfide of coal bed
  • Method for determining content of hydrogen sulfide of coal bed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A method for measuring the content of hydrogen sulfide in a coal seam, comprising the steps of:

[0068] 1. Drilling and sampling

[0069] On the coal wall of the newly exposed working face, drill hole sampling, the diameter of the drill hole is 42±10mm, after drilling to the original coal body with a depth of 15m, collect coal cuttings, and record the start time of coal sampling t 1 ;

[0070] 2. Determination of desorption amount

[0071] The desorption volume is the volume of the coal sample desorbed gas in the coal sample tank during the measurement period;

[0072] Put the collected coal sample into the coal sample tank and seal it quickly and record the time t 2 , and then use a desorption instrument to measure the coal samples in the coal sample tank at different times t i Cumulative desorbed gas volume of the coal sample;

[0073] Hydrogen sulfide is easily soluble in water, because the hydrogen sulfide desorbed from the coal sample will be ionized after di...

Embodiment 2

[0149] According to the method of embodiment 1, coal sample B was taken in the E902 material lane of Tiexin Mine, and an on-site desorption experiment was carried out on the coal sample. After the on-site desorption of the coal sample, it was sealed and sealed and sent to the laboratory for testing the remaining amount:

[0150] (1) On-site coal sample hydrogen sulfide desorption amount: by measuring the volume and pH value of the aqueous solution in the measuring tube and measuring cylinder of the desorption instrument before desorption and after 2 hours of desorption, the amount of the desorbed hydrogen sulfide substance can be determined. According to the standard gas state, Then obtain the gas volume for desorbing hydrogen sulfide;

[0151] The coal sample was taken from the E902 material lane in the mine, and the on-site desorption test was carried out. It was determined that the coal sample B in the measuring tube of the desorption instrument desorbed 368mL of gas, and th...

Embodiment 3

[0174] According to the method of embodiment 1, coal sample C was taken in the E904 material lane of Tiexin Mine, and an on-site desorption experiment was carried out on the coal sample. After the on-site desorption of the coal sample, it was sealed and sealed and sent to the laboratory for testing the remaining amount:

[0175] (1) On-site coal sample hydrogen sulfide desorption amount:

[0176] The total desorption time is 60 minutes. During the first 10 minutes after the start of desorption, record the reading of the measuring tube of the desorption instrument every 1 minute, and then record the reading every 2 minutes;

[0177] By measuring the volume and pH value of the aqueous solution in the desorption meter measuring tube and measuring cylinder before and after desorption for 1 hour, the amount of the desorbed hydrogen sulfide substance can be determined, and then the gas volume of the desorbed hydrogen sulfide can be obtained according to the standard gas state;

[0178...

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Abstract

Aiming at the situation that the research on the content of hydrogen sulfide of the coal bed and the relevant determination technique are not reported inland, the invention provides a method for determining the content of hydrogen sulfide of a coal bed and belongs to the technical field of coal mining engineering. The method comprises the following steps: drilling and sampling at a newly exposed tunneling working face; then desorbing the taken coal sample in field, and determining the desorption amount of hydrogen sulfide according to the concentration of hydrogen ion in water; calculating the hydrogen sulfide loss amount of the coal sample in the collection process according to the hydrogen sulfide gas desorption rule; and then determining the residual amount of hydrogen sulfide in the coal sample by chromatography. The content of hydrogen sulfide in the coal sample is calculated according to the mass of the taken coal sample, the field desorption amount of hydrogen sulfide, the loss amount and the residual amount. The method is simple to operate, is high in practicability, is relatively low in cost, and can be used for directly measuring the content of hydrogen sulfide in the coal bed.

Description

technical field [0001] The invention belongs to the technical field of mining engineering, in particular to a method for measuring the hydrogen sulfide content of coal seams. Background technique [0002] Hydrogen sulfide is a colorless, acidic and highly toxic gas, which is very harmful to human life. Coal seam hydrogen sulfide content refers to the volume of hydrogen sulfide contained in unit mass of coal body. Hydrogen sulfide hazards in mines mostly occur in non-metallic mines such as gypsum mines, and coal mines with hydrogen sulfide hazards are rare. There have been related reports in mines such as Xiqu Mine, Wuda Mine, Xishan Mine, Tingnan Mine, and Tiexin Mine in China . During the mine production process, hydrogen sulfide flows to the working face in large quantities with the mining of coal seams, and the concentration of hydrogen sulfide in the wind flow of the working face can reach dozens to more than one hundred ppm (×10 -4 %), far higher than the 6.6ppm (0.0...

Claims

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Application Information

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IPC IPC(8): G01N7/14
Inventor 孙维吉袁欣鹏梁冰秦冰李蕾石占山贾立锋石迎爽施永威郝建峰
Owner LIAONING TECHNICAL UNIVERSITY
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