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Method and device for detecting coal powder performance

A technology of pulverized coal combustion and detection method, which is applied in the direction of fuel oil testing, chemical analysis by combustion, material inspection products, etc. It can solve the problems of high power consumption, time-consuming and laborious, complicated operation, etc., and achieve shortened measurement time and less human factors , The effect of saving power consumption

Inactive Publication Date: 2007-09-19
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the respective combustion test devices are different in form, they all belong to the dynamic combustion method in a suspended state, so there are common problems such as large equipment, complicated operation, time-consuming and labor-intensive, and high power consumption.

Method used

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  • Method and device for detecting coal powder performance
  • Method and device for detecting coal powder performance
  • Method and device for detecting coal powder performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. According to the provisions of GB474-1996 "Preparation Method of Coal Samples", the analytical coal samples below 0.2mm are prepared and air-dried.

[0023] 2. Start the infrared gas analyzer 5 and the suction pump 7, and adjust the rotameter 6 to meet the measurement flow required by the infrared gas analyzer.

[0024] 3. Weigh 100±2mg (accurate to 0.1mg) of an air-dried coal sample with a particle size of 0.2mm or less, put it into an ash dish, vibrate lightly to spread the coal sample evenly, and then send it into a combustion chamber with a temperature not exceeding 100°C. 2 in the constant temperature zone of the furnace.

[0025] 4. After the preheating of the infrared gas analyzer is completed and the test conditions are met, the temperature controller 3 is started to rapidly raise the temperature of the combustion furnace 1 under the condition of a constant heating rate. Simultaneous tracking and detection of CO 2 gas content.

[0026] 5. Use the computer ...

Embodiment 2

[0029] 1. According to the provisions of GB474-1996 "Preparation Method of Coal Samples", the analytical coal samples below 0.2mm are prepared and air-dried.

[0030] 2. Start the temperature controller 3 to heat the combustion furnace 1, start the infrared gas analyzer 5 and the air pump 7, and adjust the rotameter 6 to meet the measurement flow required by the infrared gas analyzer. After the combustion furnace 1 is heated to 1200°C, it will continue to maintain a constant temperature.

[0031] 3. Weigh 100±2mg (accurate to 0.1mg) of an air-dried coal sample with a particle size of 0.2mm or less and put it into the ash dish, and shake it lightly to spread the coal sample evenly.

[0032] 4. After the preheating of the infrared gas analyzer 5 is completed and the constant temperature time of the combustion furnace is > 15 minutes, quickly send the ash dish containing the coal sample into the constant temperature zone of the combustion furnace 2 .

[0033] 5. Use the computer ...

Embodiment 3、4

[0036] According to the same steps as in Example 2, the combustion performance of a certain coal powder at a constant temperature of 800°C and a constant temperature of 1000°C was measured respectively, and the results are shown in FIG. 4 .

[0037] By using the pulverized coal combustibility detection method and the device thereof of the present invention, the combustibility index of pulverized coal can be measured conveniently, quickly and accurately, and quantified. Based on this, the type of coal injection and its combination can be reasonably selected to achieve complementary coal quality, improve its combustion performance, meet the requirements of blast furnace injection, and achieve the best economic effect.

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Abstract

The present invention provides a pulverized coal combustion performance test method and an equipment thereof. Said method comprises preparing a coal sample, making the coal sample burn wherein the pulverized coal is kept in an immobile state during the burning course , continuously monitoring online the related gas content generated during the burning course, and analyzing the results. The equipment achieving said method consists mainly of a combustion furnace as well as its temperature controlling system, a combustion gas sampling and purifying, an online gas analyzer as well as its data collecting and processing system. The present invention estimates the burning states of pulverized coal according to the generating course of combustion waste gas, and then is capable of not only determining firing point and combustion course of pulverized coal, but also directly quantificating pulverized coal combustion performance. Said test method is simple and normative, the test course is simple and convenient, and the data obtained are correct and reliable, both saving manpower and material resources and reducing power consumption.

Description

technical field [0001] The invention belongs to a laboratory detection technology for pulverized coal combustion characteristics, and is particularly suitable for the detection of coal for blast furnace ironmaking injection, so as to evaluate the combustion performance of pulverized coal in the blast furnace coal injection process. Background technique [0002] Blast furnace pulverized coal injection is one of the key technologies to realize the optimization of blast furnace ironmaking process. It is currently the most effective coke reduction method in the world, and has significant economic and social benefits. Significantly increasing the coal injection ratio of blast furnaces and replacing expensive metallurgical coke are important measures for blast furnaces to save energy, reduce consumption and enhance competitiveness. The key to increasing the coal ratio is to increase the utilization rate of pulverized coal so that pulverized coal injection can be effectively utiliz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/12G01N25/22G01N33/22
Inventor 王再义邢本策王相力裴海玉张洪宇
Owner ANGANG STEEL CO LTD
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