Online monitoring method for flue gas temperature of hearth outlet of power station boiler

A technology of flue gas temperature and furnace outlet, which is applied in the field of monitoring, can solve problems such as boiler safety and economical impact, tube panel overtemperature creep damage, temperature deviation, etc., to improve monitoring accuracy, increase effective diameter, maintain consistent effect

Inactive Publication Date: 2010-08-18
四川东脑电气工程有限公司
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  • Abstract
  • Description
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Problems solved by technology

Due to this reason, temperature deviation of the reheated and superheated steam on both sides may occur, as well as over-temperature creep damage of the tube panel, and tube burst due to serious over-temp

Method used

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Embodiment Construction

[0031] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0032] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0033] A method for on-line monitoring of flue gas temperature at the furnace outlet of a utility boiler, comprising the following steps:

[0034] Multiple targets are arranged on the vertical section near the smokestack of the boiler. Since the temperature of the target changes with the temperature of the flue gas, the target can be used for temperature sensing; the target is made of silicon carbide material, which is extruded and fired to en...

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Abstract

The invention discloses an online monitoring method for the flue gas temperature of a hearth outlet of a power boiler, comprising the steps of: placing a plurality of targets at a vertical section near a smokestack of a boiler for sensing the temperature; installing a near infrared imaging device on the side wall of a horizontal flue of the boiler for collecting the radiation energy of the targets; carrying out communication by the near infrared imaging device with a computer through a serial port and RS232, sending the collected radiation energy of the targets to the computer, calculating by the computer to obtain temperature data of the targets; and then sending the temperature data of the targets to a host computer for processing, and converting the temperature to the flue gas temperature of the position of the targets. The invention has the advantages that the average temperature at the section of the hearth outlet, the average temperature of the upper/lower and left/right side, and the highest/the lowest temperature can be continuously monitored, the distribution curve of the temperature of the section can be drawn, and a plurality of alarm functions are set; and the invention is beneficial to the safe and economic operation of a boil with a large capacity and high parameters.

Description

technical field [0001] The invention relates to a monitoring method, in particular to an online monitoring method for flue gas temperature at the furnace outlet of a power plant boiler. Background technique [0002] The measurement of the flue gas temperature in the furnace of the power plant boiler is of great significance is the "monitoring of the flue gas temperature at the furnace outlet of the power plant boiler". Because this position is the junction point between the convection zone and the radiation zone, the flue temperature at the furnace outlet is of great significance to the boiler operation control. The temperature change at this position can timely reflect the change of energy in the furnace and the change of the operating state of the boiler. The wind and smoke system participates in the energy exchange and combustion process of the system, and has a great impact on the economy, reliability and safety of the boiler system. Controlling the parameters of flue g...

Claims

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Application Information

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IPC IPC(8): G01J5/00G01J5/60
Inventor 王维礼陈帮海肖炜靳秀强
Owner 四川东脑电气工程有限公司
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