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Boiler operation method and boiler equipment

A method of operation and boiler technology, applied in the direction of combustion method, combustion equipment, steam generation method using pressure combustion, etc., can solve the problems such as the reduction of heat storage rate of the furnace

Active Publication Date: 2021-04-20
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the above-mentioned conventional boiler operating method, the heat storage rate of the furnace sometimes decreases regardless of whether or not the ash adhesion is suppressed.

Method used

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  • Boiler operation method and boiler equipment
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  • Boiler operation method and boiler equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0085] In addition, the operating method and boiler plant of the boiler of this invention are not limited to the said embodiment.

[0086] In the above-mentioned embodiment, the method of determining the mixing ratio of various solid fuels according to the content of kaolin was described as the operation method of the boiler and the boiler equipment, but it may also be determined according to the content of gypsum in the ash, other water content, etc. The mineral content is used to determine the mixing ratio of solid fuel.

[0087] In addition, as the operating method and boiler equipment of the boiler, the mixing ratio may be determined based on the content ratio of two or more kinds of hydrous minerals. When determining the mixing ratio based on the content of two or more hydrous minerals, the mixing ratio may be determined such that the sum of the content ratios of the hydrous minerals becomes equal to or less than a reference value, or may be determined so that the content...

Embodiment

[0089] Hereinafter, although an Example demonstrates this invention in more detail, this invention is not limited to these Examples.

[0090] (solid fuel)

[0091] First, prepare three types of coal as solid fuel. Coal was burned using a pulverized coal thermal boiler (power generation capacity: 700 MW), and the ash content of these three types of coal and the content of kaolin in the ash were obtained. In addition, the content rate of the ash content of coal was performed by the measuring method based on JIS-M-8812:2006. In addition, the content rate of the kaolin in ash was calculated based on the mass of the kaolin obtained by CCSEM analysis. The results are shown in Table 1.

[0092] 【Table 1】

[0093]

[0094] (No.1~No.7)

[0095] Next, using two or three types of coal among these three types of coal, the mixing ratio of No. 1 to No. 7 coals shown in Table 2 was selected, and the content of kaolin in the ash was calculated. In addition, using the mixed coal mixed...

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Abstract

An object of the present invention is to provide a boiler operation method and boiler equipment capable of suppressing a reduction in the heat storage rate of the furnace. The present invention is a method for operating a boiler in which a plurality of solid fuels are mixed and burned, comprising: obtaining the content of ash in the plurality of solid fuels and the content of at least one type of hydrous mineral in the ash. and based on the content of the ash content and the content of the at least one hydrous mineral in each of the plurality of solid fuels obtained in the obtaining step, according to the above-mentioned ash content in the entire mixture of the plurality of solid fuels. A step of determining the mixing ratio of the plurality of solid fuels so that the content of at least one type of hydrous mineral becomes equal to or less than a reference value. The above-mentioned at least one hydrous mineral may be kaolin or gypsum. As said reference value, 40 mass % is preferable.

Description

technical field [0001] The invention relates to a boiler operating method and boiler equipment. Background technique [0002] A boiler includes a furnace (Japanese original text: furnace) for burning solid fuel with a burner or the like, and a plurality of heat transfer tubes arranged vertically in the furnace to perform heat exchange. In addition, the heat transfer tube is composed of a lower heat transfer part and an upper heat transfer part. The lower heat transfer part is equipped with a primary heater, a primary reheater and a coal economizer arranged at the lower The secondary heater, tertiary heater, final heater and secondary reheater in the upper part of the furnace. [0003] In such a boiler, for example, in a pulverized coal boiler using coal as a solid fuel, ash in the combustion gas generated by the combustion of coal sometimes adheres to and accumulates on the furnace wall of the furnace, slagging of the heat transfer tube, Fouling, forming an ash adhesion la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22B1/22F23K3/16F22D1/00F23L1/00
CPCF22B1/22F22D1/00F23K3/16F23L1/00
Inventor 秋山胜哉松宫知朗
Owner KOBE STEEL LTD