Thermocouple temperature monitoring method and system for air preheater

An air preheater and thermocouple technology, which is applied in the direction of thermometers, thermometers, and combustion methods that use electrical/magnetic components directly sensitive to heat, can solve problems such as false alarms, heating components catching fire, and fire formation. , to achieve the effect of improving reliability, increasing reliability and service life, and reducing judgment interference

Active Publication Date: 2005-01-26
SHANGHAI BOILER WORKS +1
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Problems solved by technology

[0002] The air preheater is an important supporting equipment for large generator boilers. Inside the air preheater, the incompletely burned accumulation deposited on the surface of the heating element will easily generate hot spots when encountering sufficient oxygen at the air inlet. If the hot spots are slow Slow diffusion will cause the heating element to catch fire and form a fire, which will cause serious and irreparable losses. In order to prevent the air preheater from igniting, it is necessary to install monitoring devices in the air preheater system. Commonly

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  • Thermocouple temperature monitoring method and system for air preheater
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  • Thermocouple temperature monitoring method and system for air preheater

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with accompanying drawing and embodiment, take the air preheater of 300MW boiler as an example.

[0034] The devices required for the present invention include:

[0035] (1) 30 dedicated thermocouple probes;

[0036] (2) Special thermocouple probe installation tube;

[0037] (3) Control cabinet

[0038] Such as figure 1 , 2 As shown, it is the layout diagram of the thermocouple probes of the air preheater, which consists of air preheater 1, 11 special thermocouple probes at the two groups of air outlets 2, and 2 special thermocouple probes at the two groups of air inlets 3 , Two sets of flue gas inlets are composed of 2 dedicated thermocouple probes 4, thermocouple group installation tube 5, local junction box 6, stop alarm sensor hoop 7, and proximity switch 8.

[0039] Install 11 special thermocouple probe sets 2 along the radial direction at the air outlets of the A and B sides of the air prehe...

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Abstract

This invention relates to a measuring method and system for air temperature of preheater couple. The method is as following: to fix eleven exclusive heat electric thermocouple probes according to the size and direction of the radius of preheater in the air outlets on A, B side of the preheater; and to fix two exclusive electric thermocouple probes in the air inlet and to fix two exclusive electric thermocouple probes in gas inlet and to fix hoop approach switch and inductive slice in rotary axis of preheater. The whole apparatus can be operated with electricity, setting the temperature of temperature controller in control cabinet. Then to calculate the temperature of air inlet, gas inlet and air outlet through the program control and thus get a group of values of temperature efficiency of preheater. The temperature around inner points of the preheater can be read on the touch display.

Description

technical field [0001] The invention relates to an air preheater thermocouple temperature monitoring method and system, which are used for monitoring the air preheater thermocouple temperature of a large-scale thermal power generating set boiler, and belong to the technical field of air preheater thermocouple temperature monitoring. Background technique [0002] The air preheater is an important supporting equipment for large generator boilers. Inside the air preheater, the incompletely burned accumulation deposited on the surface of the heating element will easily generate hot spots when encountering sufficient oxygen at the air inlet. If the hot spots are slow Slow diffusion will cause the heating element to catch fire and form a fire, which will cause serious and irreparable losses. In order to prevent the air preheater from igniting, it is necessary to install monitoring devices in the air preheater system. Commonly used are infrared hot spot detection detectors and ther...

Claims

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Application Information

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IPC IPC(8): F23L15/00G01K1/02G01K1/14G01K7/02
CPCY02E20/34
Inventor 蔡明坤匡俊盛丽赖炎显
Owner SHANGHAI BOILER WORKS
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