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A detection method for coal quality characteristics suitable for medium-storage pulverizing system

A pulverizing system and detection method technology, applied in the direction of material thermal development, etc., can solve problems such as great difference in ignition stability, fire extinguishing, and unstable combustion of boilers

Active Publication Date: 2017-09-29
STATE GRID CORP OF CHINA +1
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Problems solved by technology

However, in the practice of boiler operation, it often happens that the volatile content of coal-fired coal meets or approaches the set value while the boiler burns unstable or even goes out, which requires a more comprehensive index to judge the ignition stability of coal-fired
In some cases, the volatile content of coal is similar, but its ignition stability is very different, and the difference cannot be distinguished according to the current detection method of coal quality characteristics.

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  • A detection method for coal quality characteristics suitable for medium-storage pulverizing system

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with embodiment.

[0025] A new method for comprehensively judging the ignition stability of coal based on industrial analysis of coal is provided.

[0026] The industrial analysis of coal includes items such as air-dry basis moisture, air-dry basis ash, dry ash-free volatile matter (or air-dry basis volatile matter), air-dry basis fixed carbon, air-dry basis high calorific value, etc., general coal quality analysis Laboratories can perform these tests. Air-dry basis volatile matter, air-dry basis ash, air-dry basis fixed carbon and air-dry basis moisture are basically close to all components of coal powder in the storage bin, and the sum of their values ​​is 100. Therefore, the air-dry calorific value of coal is the sum of the calorific value of the above four items. Moisture and ash have no calorific value, only fixed carbon and volatile matter can be burned to generate heat. The calorific value o...

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Abstract

The invention discloses a method for detecting coal quality characteristics suitable for an intermediate storage type pulverizing system, comprising the following steps: using an automatic industrial analyzer to measure the air-dry basis moisture, air-dry basis ash and air-dry basis volatile matter of coal, And calculate the fixed carbon on an air-dry basis; use the calorimeter to measure the calorific value of the coal-fired cartridge; use the sulfur meter to measure the total sulfur to obtain the air-dry basis sulfur content; , to calculate the high-level calorific value of coal-fired air-dry basis; according to the fixed carbon of air-dry basis, calculate the calorific value of fixed carbon on an air-dry basis; calculate the ratio of the calorific value of fixed carbon on an air-dry basis to the volatile heat of an air-dry basis, and evaluate the fire stability sex. The present invention can comprehensively evaluate the ignition stability of coal combustion for the storage bin type pulverizing system, especially can judge the ignition stability when the volatile content of coal combustion is close.

Description

technical field [0001] The invention relates to a coal quality characteristic detection method suitable for an intermediate storage pulverizing system. Background technique [0002] In the production process of electric power, energy, building materials, metallurgy and other industries, it is often necessary to use pulverized coal to burn in the boiler to heat water to generate steam to meet the requirements of the production process. The safe and stable combustion of pulverized coal is an important guarantee for the continuous and reliable operation of the boiler. In order to make the quality of coal combustion meet the needs of stable combustion, it is usually required that the volatile content of coal entering the furnace should not be lower than a certain value, otherwise it will lead to unstable combustion and abnormal situations such as boiler fire extinguishing. [0003] At present, the volatile content is widely used as the criterion for judging the ignition stabili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/20
Inventor 杨兴森尹静郝卫东胡志宏侯凡军
Owner STATE GRID CORP OF CHINA
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