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Simple and convenient method for calculating free silicon dioxide in power coal

A technology of silicon dioxide and thermal coal, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of skin burns, long measurement period, harmful pyrophosphate, etc., achieve high accuracy, high practical guiding significance, calculation Simple and easy method

Pending Publication Date: 2022-01-11
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current method for the determination of free silica in coal is DL / T258-2012 "Determination of free silica in coal": ① Phosphoric acid or pyrophosphoric acid is used in it, and pyrophosphoric acid may be harmful to the environment and accidentally touches the skin or eyes, which can easily cause skin burns or eye damage; ②The measurement period is long, and the determination of free silica content in a single sample takes about 1-2 days

Method used

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  • Simple and convenient method for calculating free silicon dioxide in power coal
  • Simple and convenient method for calculating free silicon dioxide in power coal
  • Simple and convenient method for calculating free silicon dioxide in power coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Calculation of free silica content in sample X:

[0022] The first step: measure the total moisture (M t,X , %), according to the industrial analysis method of GB / T 212-2008 coal, its air-dry base ash content (A ad，X , %), air-dry basis moisture (M ad，X , %), according to DL / T 1037-2016 coal ash composition analysis method to determine the silica content (SiO 2，X ,%), the result is as follows:

[0023] m t,X = 12.6%, A ad，X =44.11%, M ad，X = 1.43%, SiO 2，X = 55.96%;

[0024] The second step: calculate the received base ash of sample X (A ar,x , %):

[0025]

[0026] Step 3: Calculate the content of free silica in coal [SiO 2 (F) ar，X , %]

[0027] SiO 2 (F) ar，X =0.183·A ar，X +0.019 SiO2 2，X -1.135

[0028] =0.183*39.11+0.019*55.96-1.135=7.09(%).

[0029] The detection result of free silica content in sample X was 7.02%.

Embodiment 2

[0031] Calculation of free silica content in sample Y:

[0032] The first step: measure the total moisture (M t,Y , %), according to the industrial analysis method of GB / T 212-2008 coal, its air-dry base ash content (A ad，Y , %), air-dry basis moisture (M ad，Y , %), according to DL / T 1037-2016 coal ash composition analysis method to determine the silica content (SiO 2，Y ,%), the result is as follows:

[0033] m t,Y = 3.2%, A ad，Y =24.78%, M ad，Y = 0.92%, SiO 2，Y = 50.82%;

[0034] The second step: calculate the received basis ash of sample Y (A ar,Y , %):

[0035]

[0036] Step 3: Calculate the content of free silica in coal [SiO 2 (F) ar，Y , %]

[0037] SiO 2 (F) ar，Y =0.183·A ar，Y +0.019 SiO2 2，Y -1.135

[0038] =0.183×24.21+0.019×50.82-1.135=4.26 (%).

[0039] The detection result of free silica content in sample Y was 4.59%.

Embodiment 3

[0041] Calculation of free silica content in sample Z:

[0042] The first step: measure the total moisture (M t,Z , %), according to the industrial analysis method of GB / T 212-2008 coal, its air-dry base ash content (A ad，Z , %), air-dry basis moisture (M ad，Z , %), according to DL / T 1037-2016 coal ash composition analysis method to determine the silica content (SiO 2，Z ,%), the result is as follows:

[0043] m t,Z =8.2%, A ad，Z = 11.98%, M ad，Z = 2.20%, SiO 2，z = 46.17%;

[0044] The second step: calculate the received base ash of sample Z (A ar,Z , %):

[0045]

[0046] Step 3: Calculate the content of free silica in coal [SiO 2 (F) ar，Z , %]

[0047] SiO 2 (F) ar，Z =0.183·A ar，Z +0.019 SiO2 2，Z -1.135

[0048] =0.183×11.25+0.019×46.17-1.135=1.80(%).

[0049] The detection result of free silica content in sample Y was 1.68%.

[0050] It can be seen from the above examples that the free silicon dioxide content calculated by the method of the present inve...

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Abstract

The invention discloses a simple and convenient method for calculating free silicon dioxide in power coal. The simple and convenient method comprises the following steps: 1, measuring the total moisture Mt of coal, the air dry basis ash content Aad of coal, the air dry basis moisture Mad and the silicon dioxide content in coal ash components; 2, calculating as received basis ash content Aar of the coal according to the measured total moisture Mt of the coal, the air drying basis ash content Aad of the coal and the air drying basis moisture Mad of the coal; and 3, calculating the content of free silicon dioxide in the coal according to the as received basis ash content Aar of the coal and the silicon dioxide content in the coal ash component. Parameter indexes used in the calculation method are easy to obtain in a conventional coal quality test report, the calculation method is simple, a calculation result is very close to an actual detection result, and the calculation method has high actual guiding significance.

Description

technical field [0001] The invention belongs to the technical field of thermal power, and in particular relates to a simple and convenient method for calculating free silicon dioxide in steam coal (lignite, bituminous coal and anthracite). Background technique [0002] Coal mines, iron and steel plants, and thermal power plants emit a large amount of soot, mine dust, and dust every day during the production process, and the main pollutant is silicon dioxide. Depending on the chemical composition, dust can cause fibrosis, irritation, poisoning and sensitization to the human body. The main ways for dust to invade the human body are: respiratory system, eyes, skin, etc., among which the respiratory system is the main way. Free silica in mine dust or dust can cause silicosis (pneumoconiosis). The incidence of pneumoconiosis, the length of the onset period, and the severity of pneumoconiosis are not only related to the concentration and dispersion of mine dust or dust, but also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/22
CPCG01N33/222
Inventor 郭孟狮田野杜玲吴颖庆马筠刘立新杜晓光
Owner XIAN THERMAL POWER RES INST CO LTD