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Oxygen content detecting method for boiler fuel gas of coal-fired power station

A technology for flue gas oxygen content and boiler flue gas, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of model accuracy decline and model update without consideration, and achieve low cost and no increase Hardware equipment, high precision effect

Inactive Publication Date: 2014-05-28
SHANGHAI JIAO TONG UNIV +1
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Problems solved by technology

However, these data models do not consider the update of the model, and the accuracy of the built model continues to decline over time.

Method used

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  • Oxygen content detecting method for boiler fuel gas of coal-fired power station
  • Oxygen content detecting method for boiler fuel gas of coal-fired power station
  • Oxygen content detecting method for boiler fuel gas of coal-fired power station

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Embodiment Construction

[0046] In a preferred embodiment, a soft measuring method for oxygen content in flue gas of a coal-fired power plant boiler, the specific steps of the design method are as follows:

[0047] Step 1. Raw data acquisition

[0048] Through the distributed control system of the power station, the operating variables related to the oxygen content of the flue gas are obtained. In order to soft measure the oxygen content in the flue gas of coal-fired boilers, it is first necessary to find indirect variables closely related to it as the input variables of the soft sensing model. The main reason for the generation of oxygen in the flue gas is that the amount of air input to the boiler is greater than the amount of air required for pulverized coal combustion, and part of the oxygen in the air does not participate in the combustion chemical reaction. Therefore, the oxygen signal in the flue gas is closely related to various variables in the combustion system. In this paper, the followin...

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Abstract

The invention discloses an oxygen content detecting method for boiler fuel gas of a coal-fired power station. The oxygen content detecting method includes: step 1, acquiring and preprocessing primary data; step 2, screening variables; step 3, selecting training samples; step 4, establishing at least square supported vector machine model; step 5, comparing relation between an output value of a soft-measuring model and a measured value of a zirconia sensor, and selecting one of the output value and the measured value as a detecting value of a fuel gas oxygen content detecting system. The oxygen content detecting method has the advantages of no added hardware equipment, good reliability, sufficient precision and the like, and can realize precise measurement for oxygen content of the fuel gas of large boilers.

Description

technical field [0001] The invention relates to a method in the technical field of computer detection, in particular to a method for detecting oxygen content in flue gas of a coal-fired power plant boiler. Background technique [0002] The combustion process of a coal-fired power plant boiler is a process in which air and coal are sent into the furnace in a certain proportion to undergo a chemical reaction. According to the proportion of each element in the pulverized coal, the air flow required for complete combustion can be calculated. However, in actual production, coal powder particles and air cannot be mixed very uniformly. In order to ensure the sufficiency of combustion, it is necessary to appropriately increase the amount of air sent into the furnace. In view of the difference in coal composition, the actual air supply volume is generally 1.15 to 1.25 times that of the theoretical air. The excess amount of air will cause the exhaust gas generated by combustion to ...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 王景成章云锋史元浩刘正峰袁景淇云涛屠庆徐青
Owner SHANGHAI JIAO TONG UNIV
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