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Method for judging fluidity of raw coal

A technology of fluidity and raw coal, which is applied in the field of judging the fluidity of power coal and the simple field of judging the fluidity of raw coal, can solve unreasonable problems, achieve scientific and reasonable discrimination methods, simple and convenient evaluation methods, and high industrial application value.

Active Publication Date: 2021-10-22
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology

Therefore, it is unreasonable to use the same standard to judge the fluidity of different coal types

Method used

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  • Method for judging fluidity of raw coal
  • Method for judging fluidity of raw coal
  • Method for judging fluidity of raw coal

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Embodiment Construction

[0015] Below in conjunction with example the present invention is described in further detail.

[0016] A kind of method for discriminating the fluidity of raw coal of the present invention comprises the following steps:

[0017] Step 1: According to "GB / T 211 Determination of Total Moisture in Coal" and "GB / T 212-2008 Coal Industrial Analysis Method" test to get the total moisture M of raw coal t (%) and air-dry basis moisture M ad (%);

[0018] Step 2: Calculate the external moisture M of the coal sample f (%);

[0019]

[0020] Step 3: Calculate the maximum allowable external moisture M of the coal sample according to the total moisture content of the raw coal fy (%);

[0021] m fy =0.741M t -0.87

[0022] Step 4: Compare the external moisture of the coal sample with the maximum allowable external moisture. When the external moisture of the coal sample is lower than the maximum allowable external moisture, the fluidity of the coal sample is good; otherwise, the f...

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Abstract

The invention discloses a method for judging the fluidity of raw coal. The method comprises the following steps: 1, conducting testing according to a GB / T 211 Determination Method for Total Moisture in Coal and a GB / T 212-2008 Industrial Analysis Method for Coal to obtain the total moisture Mt and air-dry basis moisture Mad of the raw coal; 2, calculating the external moisture Mf of a coal sample; 3, calculating the maximum allowable external moisture Mfy of the coal sample according to the total moisture of the raw coal, wherein Mfy is equal to 0.741Mt-0.87; and 4, comparing the external moisture of the coal sample with the maximum allowable external moisture, when the external moisture of the coal sample is lower than the maximum allowable external moisture, determining that the fluidity of the coal sample is good, otherwise, determining that the fluidity of the coal sample is poor and the risk of coal blockage exists. According to the invention, the influence of external water (spraying, rain and snow) on the fluidity of raw coal is fully considered; and the method is closer to the actual operation effect of a power plant, and has high industrial application value.

Description

technical field [0001] The invention relates to the technical field of fluidity performance discrimination of power coal, in particular to a simple method for judging the fluidity of raw coal, which is suitable for power coal. Background technique [0002] The raw coal scuttle is an important equipment for coal storage, coal loading and coal transportation in power plants. When the raw coal has poor fluidity, strong cohesive force, and many impurities, it is very easy to form sticking and blockage in the raw coal scuttle and coal falling pipe, and even cause coal breakage in severe cases. and put out the fire. The coal factors that affect the fluidity of raw coal are mainly moisture, pressure, and viscosity. The existing research results show that: with the increase of moisture outside the raw coal, the dynamic angle of repose increases and the fluidity becomes poor. "Principles of Power Station Boilers" (Rong Luanen) published by China Electric Power Publishing House shows...

Claims

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Application Information

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IPC IPC(8): G01N11/00G01N33/22
CPCG01N11/00G01N33/222
Inventor 刘家利姚伟张喜来屠竞毅方顺利李兴智李炎
Owner XIAN THERMAL POWER RES INST CO LTD
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