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Method and system for confirming optimum oxygen content of coal-fired boiler

A technology for coal-fired boilers and oxygen content, which is applied in the direction of combustion methods, combustion control, and fuel supply adjustments, and can solve problems such as the difficulty of accurate optimal oxygen content to specific values.

Active Publication Date: 2020-11-24
JIANGSU FRONTIER ELECTRIC TECH
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Problems solved by technology

[0005] The invention provides a method and system for confirming the optimal oxygen content of a coal-fired boiler, which solves the problem that the existing method is difficult to accurately determine the optimal oxygen content to a specific value

Method used

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  • Method and system for confirming optimum oxygen content of coal-fired boiler
  • Method and system for confirming optimum oxygen content of coal-fired boiler
  • Method and system for confirming optimum oxygen content of coal-fired boiler

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Embodiment Construction

[0060] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0061] Such as figure 2 As shown, a method for confirming the optimum oxygen content of a coal-fired boiler includes the following steps:

[0062] Step 1, based on the preset simplified rules, the actual operating characteristics of the boiler and the boiler performance test procedure GBT10184-2015, construct the functional expression of the boiler efficiency with respect to the oxygen derivative.

[0063] Such as figure 1 It is the structural diagram of the current boiler system. The outlet of the boiler furnace is connected to the denitrification device (SCR) and the air preheater in turn; the relationship of oxygen at different positions in the diagram is as follows:

[0064] Define the o...

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Abstract

The invention discloses a method and a system for confirming optimum oxygen content of a coal-fired boiler. The method comprises the following steps of establishing a function expression formula of boiler efficiency relative to oxygen content; and calculating to-be-solved coefficients in the function expression formula through test determination data to obtain the optimum oxygen content. The specific value of the optimum oxygen content of the boiler which operates in a full-load stage can be positioned precisely, and the operating economical benefit of a unit is improved.

Description

technical field [0001] The invention relates to a method and system for confirming the optimum oxygen content of a coal-fired boiler, belonging to the field of thermal power generation. Background technique [0002] Oxygen content in flue gas is an important monitoring parameter for the operation of coal-fired units. It can directly reflect the quality of combustion in the furnace. Changes in oxygen content will cause changes in boiler efficiency, auxiliary equipment power consumption, and steam temperature. Therefore, a reasonable amount of oxygen is of great significance to control the combustion process and achieve safe and efficient combustion. [0003] With the gradual normalization of deep peak regulation of thermal power units, the units will frequently operate in the low-to-medium load range, and the oxygen volume range that operators can accurately control is generally in the rated load and high-load ranges. The control of oxygen volume in the low-to-medium load ran...

Claims

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Application Information

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IPC IPC(8): F23N1/02
CPCF23N1/022
Inventor 王亚欧张恩先岳峻峰陈波耿察民蔡亮杨振陶谦肖杰贾涛许亦然何鹏飞
Owner JIANGSU FRONTIER ELECTRIC TECH
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