Device and method for online monitoring of high temperature superheater wall temperature of coal-fired power station boiler
A technology for high-temperature superheaters and coal-fired power stations, applied in radiation pyrometry, measuring devices, and electrical devices, etc., can solve problems such as influence and inability to measure the wall surface temperature field, improve accuracy, and realize real-time online accurate temperature measurement Effect
Active Publication Date: 2018-11-23
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 device and method for on-line monitoring of the wall surface temperature of a high-temperature superheater of a coal-fired power station boiler, wherein the device includes a set of thermocouples, an infrared lens, an infrared CCD camera, a computer, and a set of lens and camera cooling devices, and the infrared CCD camera is connected to the The infrared lens is used to record the wall infrared information entering the infrared lens; a group of thermocouples is used to measure the temperature of the measured area on the wall of the high-temperature superheater within the monitoring range; the computer obtains the infrared CCD according to the wall infrared information collected by the infrared CCD camera. The radiation intensity of the measuring points at different positions detected by the camera calculates the temperature distribution in the monitored area, and realizes the online monitoring of the wall temperature of the high temperature superheater of the coal-fired power plant boiler. The invention has the following advantages: the temperature distribution of the wall surface of the high-temperature superheater under the cover of high-temperature flue gas is obtained online, the simultaneous monitoring of the wall surface temperature of multiple pipes and a wide range is realized, and the superheated area is quickly determined and sampled and analyzed for the overheated area.
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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IPC IPC(8): G01J5/00G01K7/02
CPCG01J5/0044G01K7/02
Inventor 许传龙任建新张彪王式民
Owner SOUTHEAST UNIV