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Method for testing pulverized coal explosion with adjustable temperature

An explosion test, pulverized coal technology, applied in the direction of material explosiveness, etc., can solve the problem of not truly reflecting the explosion characteristics of the power plant pulverizing system

Inactive Publication Date: 2010-02-17
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] According to relevant data, there is also a similar test method: compressed air of a certain volume and pressure passes a certain mass of coal dust sample into the explosion tank through a solenoid valve, so that a dust cloud of a certain mass concentration is formed in the tank, and at the same time, the The coal dust cloud in the explosion tank is ignited and detonated, and its shortcoming is: the existing coal dust explosion method mainly considers the coal dust cloud, which is the main index of the mine. The actual results of the power plant are different and cannot truly reflect the explosion characteristics of the pulverizing system of the power plant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: Baorixile lignite

[0014] A temperature-adjustable pulverized coal explosion test method comprises the following steps:

[0015] First, control the temperature of the compressed air at 60°C and the pressure at 180kPa, and the temperature of the air in the explosion tank at 60°C and the pressure at 0kPa;

[0016] Second, put Baorixile lignite coal powder with a temperature of 60°C and a weight of 5.5g into the explosion tank;

[0017] Third, open the solenoid valve, put the compressed air in the air storage tank with a temperature of 60°C and a pressure of 180kPa into the explosion tank, and at the same time close the ignition electrode to ignite;

[0018] Fourth, record the highest explosion pressure Pmax and the highest explosion temperature Tmax;

[0019] Fifth: When an explosion occurs under the above conditions, reduce the weight of the pulverized coal to 5g and repeat the first to fourth steps above. After the explosion occurs, reduce the quality o...

Embodiment 2

[0027] Embodiment 2: Indonesian coal

[0028] A temperature-adjustable pulverized coal explosion test method comprises the following steps:

[0029] First, control the temperature of the compressed air at 58°C and the pressure at 182kPa, and the temperature of the air in the explosion tank at 58°C and the pressure at 0kPa;

[0030] Second, put Indonesian coal powder with a temperature of 58°C and a weight of 9g into an explosion tank.

[0031] Third, open the solenoid valve, put the compressed air in the air storage tank with a temperature of 60°C and a pressure of 185kPa into the explosion tank, and at the same time close the ignition electrode to ignite;

[0032] Fourth, record the highest explosion pressure Pmax and the highest explosion temperature Tmax;

[0033] Fifth, when an explosion occurs under the above conditions, the amount of pulverized coal can be gradually reduced, with 0.5g as the unit, and so on; and when no explosion occurs under the above conditions, the ...

Embodiment 3

[0041] Embodiment 3: Guizhou anthracite

[0042] A temperature-adjustable pulverized coal explosion test method comprises the following steps:

[0043] First, control the temperature of the compressed air at 260°C and the pressure at 280kPa, and the temperature of the air in the explosion tank at 260°C and the pressure at 0kPa;

[0044] Second, put Guizhou anthracite coal powder with a temperature of 260°C and a weight of 15g into the explosion tank;

[0045] Third, open the solenoid valve, put the compressed air in the air storage tank with a temperature of 260°C and a pressure of 280kPa into the explosion tank, and at the same time close the ignition electrode to ignite;

[0046] Fourth, record the highest explosion pressure Pmax and the highest explosion temperature Tmax;

[0047] Fifth, when there is no explosion under the above conditions, gradually increase the weight of pulverized coal. For coal types that are difficult to explode, the amount of pulverized coal added ...

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PUM

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Abstract

The invention discloses a method for testing pulverized coal explosion with adjustable temperature. The method comprises the following steps: 1. controlling the temperature of the compressed air to be60-300 DEG C, the pressure to range from 150 kPa to 200 kPa, the temperature of an exploding can to be 60-300 DEG C, the pressure thereof to be 0 kPa; 2. loading the pulverized coal into the exploding can, wherein, the heated temperature of the pulverized coal is 60-300 DEG C, and the weight thereof is 2-30g; 3. opening an electromagnetism valve, filling the compressed air in an air storage tankinto the exploding can, and simultaneously closing the ignition electrode; 4. recording the highest pressure and highest temperature of the explosion; and 5. when explosion occurs under the above conditions, reducing the weight of the pulverized coal by 0.5g sequentially; and then repeating the work from the first step to the fourth step until the pulverized coal does not explode. The method is simple and practical, and can embody the characteristics of explosion features of the coal pulverizing system of the electric power plant.

Description

technical field [0001] The invention relates to a coal powder explosion test method, in particular to a temperature-adjustable coal powder explosion test method. Background technique [0002] In previous designs, the volatile content of coal was generally used to determine the explosive performance of coal. In fact, this method has great limitations and uncertainties. With the development of coal quality characteristic analysis technology and testing methods, there are existing indexes such as thermogravimetric analysis index and coal pulverized air flow ignition temperature index. These characteristic parameters can reflect the explosive performance of coal powder to a certain extent. my country's newly compiled "Technical Regulations for Explosion-proof Design of Coal and Pulverizing System in Thermal Power Plants" also uses these characteristic parameters as indicators of the difficulty of pulverized coal explosion. [0003] According to relevant data, there is also a si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/54
Inventor 姚伟王月明刘家利王桂芳蒙毅杨忠灿相大光何红光薛宁
Owner XIAN THERMAL POWER RES INST CO LTD