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Electrical heating type cylindrical raw coal spontaneous combustion testing device and method

A technology of electric heating and test equipment, which is applied in the direction of material weighing, instruments, measuring devices, etc., can solve the problem that the stacking and management of coal yards in power plants do not have test reference value, and cannot truly reflect the spontaneous combustion of coal piles in power plants, test status and The actual spontaneous combustion state of the coal pile in the power plant is very different, etc.

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

The existing test method is mainly to test the ignition point of pulverized coal by adding chemical substances or testing the ignition point of pulverized coal on a small experimental bench in the laboratory. Generally, the amount of pulverized coal required is less than 1g, which cannot truly reflect the spontaneous combustion of coal piles in power plants in the piled state. Its disadvantage is that the test state is far from the spontaneous combustion state of the actual coal pile in the power plant, and has no test reference value for the power plant coal yard stacking and management

Method used

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  • Electrical heating type cylindrical raw coal spontaneous combustion testing device and method

Examples

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example 1

[0047] In the first step, the raw coal of Zhalainuoer lignite is crushed to a particle size below 13mm, and put into the cylindrical electric heating furnace 3, leaving a height of 5mm on the top of the cylindrical electric heating furnace 3,

[0048] In the second step, the heating condition is controlled as 30°C-60min-60°C-90min-150°C-150min-300°C-10min-300°C-50min-30°C,

[0049] The third step: install the pipeline 2 of the oxygen meter on the gas outlet pipe of the furnace cover of the cylindrical electric heating furnace 3,

[0050] Step 4: Weigh Zhalai Nuoer lignite sample 4, the initial weight is 11.38kg,

[0051] The fifth step is to raise the temperature of the cylindrical electric heating furnace 3 through the temperature controller, thereby heating the internal sample 4, and collecting the six-level temperature of the coal pile 4, which are 1 to 6 from top to bottom, At the same time, the weight of sample 4 is also measured, and the oxygen content is manually recor...

example 2

[0057] In the first step, the live chicken and rabbit raw coal sample 4 is crushed to a particle size below 13 mm, and put into the cylindrical electric heating furnace 3, leaving a height of 6 mm on the top of the cylindrical electric heating furnace 3,

[0058] In the second step, the heating condition is controlled as 30°C-60min-60°C-90min-150°C-150min-300°C-10min-300°C-50min-30°C,

[0059] Step 3: Install the pipeline 2 of the deaeration meter on the gas outlet pipe of the furnace cover of the cylindrical electric heating furnace 3

[0060] Step 4: Weigh live chicken and rabbit coal sample 4, the initial weight is 11.96kg,

[0061] The fifth step is to raise the temperature of the cylindrical electric heating furnace 3 through the temperature controller, thereby heating the internal sample 4, and collecting the six-level temperature of the coal pile 4, which are 1 to 6 from top to bottom, At the same time, the weight of sample 4 is also measured, and the oxygen content is...

example 3

[0067] In the first step, the Baidong coal sample 4 is crushed to a particle size below 13 mm, and put into the cylindrical electric heating furnace 3, leaving a height of 4 mm on the top of the cylindrical electric heating furnace 3,

[0068] In the second step, the heating condition is controlled as 30°C-60min-60°C-90min-150°C-150min-300°C-10min-300°C-50min-30°C,

[0069] The third step: install the pipeline 2 of the oxygen meter on the gas outlet pipe of the furnace cover of the cylindrical electric heating furnace 3,

[0070] The fourth step: weigh Baidong coal sample 4, the initial weight is 12.36kg,

[0071] The fifth step is to raise the temperature of the cylindrical electric heating furnace 3 through the temperature controller, thereby heating the internal sample 4, and collecting the six-level temperature of the coal pile 4, which are 1 to 6 from top to bottom, At the same time, the weight of sample 4 is also measured, and the oxygen content is manually recorded onc...

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Abstract

The invention discloses an electrical heating type cylindrical raw coal spontaneous combustion testing device and a method. The device comprises an electronic scale, an oxygen passing table arranged at one end of the pipeline of a deoxidation table; one end of the pipeline of the deoxidation table is connected with an air outlet pipe of a furnace cover of a cylindrical electrical heating furnace,a coal dump sample is placed in the cylindrical electrical heating furnace which is placed on the electronic scale; a thermocouple is connected with a data acquisition board which is connected with the electronic scale. The raw coal, granularity of which is the same as that of the raw coal at field, is loaded in the cylindrical electrical heating furnace; 4-6mm distance is kept between the upper part of the coal dump and the top of the cylindrical electrical heating furnace, which leads the coal dump and the oxygen in the air to have enough contact space, and the coal dump is heated; when being heated to a high enough temperature, the coal dump is reacted with a great amount of oxygen to maintain continuous spontaneous combustion, which causes that the amount of the oxygen in the peripheryreduces rapidly, the oxygen absorbing ability of the coal which is easy to spontaneously combust is stronger; the oxygen absorbing ability of the coal which is not easy to spontaneously combust is weak, so that the change of the oxygen amount at the upper part of the coal dump can reflect spontaneous-combustion tendency of the coal sample, and distinguishes spontaneous-combustion tendency of thecoal sample in the slow heating up process.

Description

technical field [0001] The invention relates to a raw coal test technology, in particular to an electric heating columnar raw coal spontaneous combustion test equipment and method. technical background [0002] There are many identification methods for the spontaneous combustion tendency of coal. At present, the more mature ones include the Austenitic method, the ignition point method, the cross point temperature method, the differential calorimetry method, the static and dynamic oxygen absorption method, etc., and the ignition activation energy of coal is used as the The classification index of coal spontaneous combustion tendency, in recent years, my country mainly adopts the flow chromatography oxygen absorption method of the Fushun Branch of the General Coal Research Institute. The above methods are mainly aimed at mines, so they have certain limitations. The existing test method is mainly to test the ignition point of pulverized coal by adding chemical substances or tes...

Claims

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Application Information

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IPC IPC(8): G01N5/00G01N7/06
Inventor 王桂芳刘家利姚伟王月明何红光薛宁蒙毅杨忠灿相大光
Owner XIAN THERMAL POWER RES INST CO LTD
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