Coal slagging degree discrimination method
A discrimination method and slagging technology, which is applied in the direction of material excitation analysis, thermal excitation analysis, process efficiency improvement, etc., can solve the problems of incomplete coverage, high calcium salt content in Zhundong coal, poor resolution, etc., and achieve high accuracy High, good applicability, simple operation effect
Active Publication Date: 2020-03-24
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology
[0004] However, the study found that the conventional slagging index to judge Zhundong coal slagging prediction has low accuracy and poor resolution, and it is difficult to provide theoretical guidance for Zhundong coal-fired boilers
The reason is that, on the one hand, conventional indicators often only consider the influence of one or several ash components on slagging, and it is difficult to fully and truly reflect the combustion status of actual boiler pulverized coal only by relying on the criterion of ash components; On the other hand, the existing empirical fitting formulas do not cover all kinds of coal, and the content of calcium salt in Zhundong coal is higher than that of other power coals. The application of conventional indicators to evaluate Zhundong coal has limitations
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[0014] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described below.
[0015] The present invention proposes a coal slagging degree discrimination method, comprising the following steps:
[0016] Step 1: Measure the SiO in the ash content of the coal sample 2 And the quality of CaO accounts for the percentage content of total mass;
[0017] Step 2: Measure the viscosity-temperature curve of the ash content of the coal sample, and take the corresponding temperature T in Celsius when the dynamic viscosity of the ash content of the coal sample is 25Pa·s 25 ;
[0018] Step 3: Through the formula Calculate C;
[0019] Step 4: Judge the slagging degree of coal according to the C value.
[0020] In this embodiment, C is the discriminant index.
[0021] In this embodiment, the criteria for judging the slagging degree of coal are: C>8.9 means mild slagging; 4.9≤C≤...
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The invention provides a coal slagging degree discrimination method. The coal slagging degree discrimination method is simple to operate; three indexes of mild slagging, moderate slagging and severe slagging of the coal ash can be judged the slagging degree of the coal ash is presented by a specific numerical value, the slagging degree of the coal ash can be judged from a microcosmic perspective,the accuracy of a test result is high, and the method has good applicability to coal types with high calcium content and can be suitable for measuring various coal types with different varieties.
Description
technical field [0001] The invention relates to the technical field of coal slagging analysis, in particular to a method for judging the degree of coal slagging. Background technique [0002] In 2005, my country discovered that the eastern part of the Jungar Basin has a large amount of coal resources, which is estimated to reach 390 billion tons. Based on the current annual coal consumption in my country, one Zhundong coal field can be used for the whole country for a hundred years. It is the largest integrated coal field in Ming Dynasty. As a low-rank coal, Zhundong coal has the characteristics of high calorific value, high moisture content, low ash melting point, and high alkali metal content. It has serious slagging problems during combustion, which limits its large-scale application. The extreme values of volatile matter, ash content, caking index, calorific value, and total sulfur in the industrial indicators of each coal seam in Zhundong Coal Mine are very close to t...
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IPC IPC(8): G01N21/73
CPCG01N21/73Y04S10/50
Inventor 金晶杭伊煊杨浩然刘敦禹熊志波王秋麟张宾宾侯封校张瑞璞朱以周刘中毅赵冰翟中媛李焕龙冯亮周健健宁星李伟李振壮
Owner UNIV OF SHANGHAI FOR SCI & TECH