Coal-fired power plant boiler high temperature superheater wall temperature online monitoring device and method
A technology for high-temperature superheaters and coal-fired power stations, applied in radiation pyrometry, measurement devices, and electrical devices, etc., can solve the problems of inability to measure and affect the wall surface temperature field
Active Publication Date: 2016-11-02
SOUTHEAST UNIV
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Problems solved by technology
However, in the measurement of coal-fired power plant boilers, the high-temperature flue gas covering the wall affects the detected wall temperature field distribution. In this case, the existing traditional infrared thermal imaging measurement method has been unable to measure the wall temperature field.
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[0031] Attached below figure 1 And specific embodiment, further illustrate the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art will fall within the limits of the appended claims of the present application to the modification of various equivalent forms of the present invention range.
[0032] The working principle of the present invention: first arrange a group of thermocouples within the local range of the wall to be monitored, use the thermocouples to obtain the real temperature of the wall, and calculate its actual radiation intensity, and place the temperature detected by the infrared CCD camera under the same position The infrared signal is converted into the detected radiation intensity, and combined with the radiation transfer equation in the steady state, the source term mult...
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The invention discloses a coal-fired power plant boiler high temperature superheater wall temperature online monitoring device and method. The device comprises a set of thermocouple, an infrared lens, an infrared CCD camera, a computer and a set of lens camera cooling device. The infrared CCD camera is connected with the infrared lens and used for recording wall infrared information entering the infrared lens. A set of the thermocouple is used for measuring temperature of the monitored area of the wall of a high temperature superheater within a monitoring range. The computer calculates temperature distribution within the monitoring area according to radiation intensity of detection points of different positions detected by the infrared CCD camera obtained through the wall infrared information acquired by the infrared CCD camera so that wall temperature online monitoring of the coal-fired power plant boiler high temperature superheater can be realized. The coal-fired power plant boiler high temperature superheater wall temperature online monitoring device and method have the following advantages that wall temperature distribution of the high temperature superheater under shielding of high temperature flue gas can be acquired online so that simultaneous monitoring of multi-pipe wide-range wall temperature can be realized, the superheat region can be rapidly determined and sampling analysis can be performed on the superheat region.
Description
technical field [0001] The invention designs a device and method for on-line monitoring of wall surface temperature of a high-temperature superheater of a coal-fired power plant boiler, belonging to the field of on-line temperature monitoring. technical background [0002] With the continuous growth of my country's national economy's demand for electricity, thermal power generation has achieved considerable development in recent years. A large number of low-emission, large-capacity, high-parameter generators have been assembled and put into production. Ultra (super) critical units are used in power plant boiler units The proportion is getting bigger and bigger. [0003] The high-temperature superheater in the coal-fired power plant boiler is subjected to the highest temperature and pressure in the steam-water system during work, and is particularly sensitive to over-temperature phenomena, and the working environment on the wall of the superheater is very harsh, and over-tempe...
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Login to View More IPC IPC(8): G01J5/00G01K7/02
CPCG01J5/0044G01K7/02
Inventor 许传龙任建新张彪王式民
Owner SOUTHEAST UNIV