Method for calculating moisture of raw coal in medium-speed coal mill online

A coal mill and moisture technology, which is applied in the fields of material moisture content, molecular entity identification, chemical process analysis/design, etc., can solve problems such as incomplete coal quality data methods for furnace coal

Active Publication Date: 2019-12-13
广东红海湾发电有限公司 +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide an online method for calculating the moisture content of raw coal in medium-speed coal mills for the technical problems of online measurement or identification of coal quality data in real time.

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  • Method for calculating moisture of raw coal in medium-speed coal mill online
  • Method for calculating moisture of raw coal in medium-speed coal mill online
  • Method for calculating moisture of raw coal in medium-speed coal mill online

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Embodiment Construction

[0031] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0032] see figure 1 , the present invention provides a method 10 for online calculation of raw coal moisture in a medium-speed coal mill, calculating the moisture Mar of raw coal through heat balance, and the method 10 for online calculation of raw coal moisture in a medium-speed coal mil...

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Abstract

The invention discloses a method for calculating the moisture of raw coals in a medium-speed coal mill online. The method comprises the steps of calculating the moisture of pulverized coals, calculating sealing air flow, calculating a pebble coal amount, calculating a heat preservation coefficient of the medium-speed coal mill, calculating heat released by primary hot air, calculating heat absorbed by the raw coals and sealing air, calculating heat taken away by pebble coals, plugging each data into a heat balance equation, setting a contrast test and verifying the moisture of the raw coals, and replacing a coal type and repeating the contrast test until a stable parameter value is obtained. The invention discloses the method for calculating moisture of the raw coals in the medium-speed coal mill online. A ground product of the medium-speed coal mill is sampled and tested, the moisture of the raw coals is calculated through a heat balance equation, multiple sets of contrast test verification are set, a calculation error of the raw coal moisture is reduced, the accurate judgment on the coal type is facilitated to reasonably control the outlet temperature of the coal mill, boiler operation parameters are adjusted to optimal values, and therefore the heat energy conversion rate of the raw coals is improved.

Description

technical field [0001] The invention relates to the technical field of thermal detection, in particular to a method for online calculation of raw coal moisture in a medium-speed coal mill. Background technique [0002] Thermal power generation is a power generation method in which the heat generated by the combustion of raw coal is used to heat the water in the boiler, and the boiler water is heated and evaporated into water vapor to drive the generator to obtain electrical energy. my country has abundant raw coal reserves, and domestic and industrial electricity mainly comes from thermal power generation. It can be said that coal has long affected people's way of life. The coal quality of raw coal determines the combustion rate and thermal energy conversion rate of raw coal. Therefore, monitoring the coal quality of raw coal is conducive to improving the utilization rate of raw coal and reducing electricity costs. At present, the coal quality status is mainly evaluated by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/56G16C20/10G16C20/20
CPCG01N25/56G16C20/20G16C20/10
Inventor 颜祝明沈跃良蒋健袁宏伟左正涛胡文平李怀强吴健林艺展戴锡辉熊辉杜黎宾石小磊
Owner 广东红海湾发电有限公司
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