CN217786354U - Power station boiler infrared temperature field temperature measurement system - Google Patents
Power station boiler infrared temperature field temperature measurement system Download PDFInfo
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- CN217786354U CN217786354U CN202222051476.0U CN202222051476U CN217786354U CN 217786354 U CN217786354 U CN 217786354U CN 202222051476 U CN202222051476 U CN 202222051476U CN 217786354 U CN217786354 U CN 217786354U
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Abstract
The utility model belongs to the technical field of utility boilers, and provides an infrared temperature field temperature measurement system of a utility boiler, which comprises an infrared non-contact temperature measurement device, wherein the infrared non-contact temperature measurement device is arranged in four directions vertical to the central axis plane of the boiler; the infrared non-contact temperature measuring device comprises a light transmission channel, a connecting piece and an infrared temperature measuring lens, wherein the light transmission channel is connected with the infrared temperature measuring lens through the connecting piece. The utility model discloses can monitor furnace temperature distribution in real time on line, have advantages such as simple and convenient, swift, accurate.
Description
Technical Field
The utility model belongs to the technical field of power plant boiler, concretely relates to infrared temperature field temperature measurement system of power plant boiler.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The distribution of the temperature in the hearth is an important parameter for reflecting the operating state of the boiler, and the reduction of the boiler efficiency, the deflection of the flame center, the burst of a furnace tube, the generation of NOx and the like are closely related to the combustion process in the boiler. The size of a coal-fired boiler of a power station is large, the temperature of flame in the boiler is over 1000 ℃, and smoke in the boiler has a large amount of fly ash, so that the traditional temperature measurement method is difficult to adapt to the severe working environment and cannot effectively monitor the distribution condition of the temperature field in the boiler on line.
At present, most of power station boilers mainly depend on the following means:
1. a smoke temperature probe: the smoke temperature probe is an electromechanical device which sends a thermocouple into a hearth or a flue to detect the temperature of smoke. The thermocouple is fixed on the head of the probe and makes telescopic movement in the smoke. Because the method adopts contact temperature measurement, the method has the defects that the method is easy to damage when being contacted with high-temperature flue gas in a furnace for continuous work, the surface is easy to coke, the measurement precision is low, only the local temperature of a hearth can be measured, and the like.
2. And (3) acoustic wave measurement: the sound wave temperature measuring device calculates the average temperature on the propagation path by sending sound wave pulses by the sound wave transmitter. Because the sound wave propagation speed is influenced by the temperature in the furnace, the smoke temperature is lower when the furnace is in low-load operation, the sound wave propagation speed is also reduced, and the data acquisition has hysteresis. And the operation condition in the furnace is complex, the noise is large, the interference is caused to the signal, the signal loss is caused, and the data accuracy is greatly reduced.
3. Laser measurement: the laser CT technology and the holographic technology are adopted, the energy consumption of equipment is huge, the cost is high, and the perforated lens is easy to accumulate dust and pollute, so that the measurement precision is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned problem, provided a power plant boiler infrared temperature field temperature measurement system, the utility model discloses can monitor furnace temperature field distribution in real time on line, have advantages such as simple and convenient, swift, accurate.
According to some embodiments, the utility model adopts the following technical scheme:
a power station boiler infrared temperature field temperature measurement system comprises infrared non-contact temperature measurement devices, wherein the infrared non-contact temperature measurement devices are arranged in four directions vertical to the plane of a central axis of a boiler;
the infrared non-contact temperature measuring device comprises a light transmission channel, a connecting piece and an infrared temperature measuring lens, wherein the light transmission channel is connected with the infrared temperature measuring lens through the connecting piece.
Furthermore, the light transmission channel comprises a first flange pipe fitting and a second flange pipe fitting, the first flange pipe fitting is provided with a hole in a gap of the furnace wall water-cooled wall and is welded and fixed, and the first flange pipe fitting is connected with the second flange pipe fitting through a flange bolt.
Furthermore, a blower is installed on the outer wall of the light transmission channel.
Furthermore, a protective sleeve is arranged outside the infrared temperature measurement lens.
Furthermore, an air filter is arranged below the protective sleeve.
Furthermore, the infrared temperature measurement lens is connected with the control room through a communication interface.
Furthermore, the communication interface adopts a HART or RS-232 communication mode.
Furthermore, the control room is connected with an alarm.
Further, the control room is connected with a display.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses can real-time on-line monitoring furnace temperature field distribute and confirm flame central point and put, prevent to burn the coking partially, control unit furnace temperature homogeneity prevents the inhomogeneous booster scheduling problem of boiler expansion.
2. In the deep peak regulation of the boiler, the combustion condition of the hearth is correctly judged by monitoring the temperature field distribution of the hearth, and control reference is provided in the aspects of preventing fire extinguishment and saving fuel oil.
3. In the starting boiler, the utility model can effectively monitor the temperature of the smoke in the hearth and prevent the problems of tube explosion and the like caused by over-temperature of the tube wall; the occurrence of pipe explosion shutdown accidents is reduced.
4. The temperature of the furnace flue gas can be effectively monitored in the operation of the boiler. By adopting corresponding means (such as adjusting the angle of a nozzle, the coal feeding amount of a coal mill, primary secondary air and the like) by operating operators, the effects of improving the combustion efficiency of the boiler and reducing the temperature of exhaust smoke can be achieved, and the effect of preventing the flame center from being burnt partially is controlled.
5. The infrared temperature measuring device belongs to an on-line non-contact type, and has the characteristics of long service life (more than 10 years), low failure rate, no maintenance cost, light weight, convenience in installation, high precision and the like.
6. The utility model discloses can realize the measurement to power plant boiler smoke temperature.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to constitute a limitation on the invention.
Fig. 1 is a structural diagram of an infrared temperature measuring device according to a first embodiment of the present invention;
FIG. 2 is a structural diagram of a power station boiler infrared temperature field temperature measurement system according to an embodiment of the present invention;
FIG. 3 is a block diagram of an embodiment of the present invention showing an air filtration system and an over-temperature protection system;
fig. 4 is a schematic layout diagram of gridding measuring points according to a second embodiment of the present invention;
the device comprises a first flange pipe fitting, a flange bolt, a blowing device, an infrared temperature measuring lens, an air filter, a connecting piece, a protective sleeve, a second flange pipe fitting, a data transfer station, an optical fiber, a control room, a first flange pipe fitting, a second flange pipe fitting, a flange bolt, a blowing device, a connecting piece, a protective sleeve, a second flange pipe fitting, a data transfer station, a data transmission station, a control room and an optical fiber.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be understood that when the term "comprising" is used in this specification it indicates the presence of the feature, step, operation, device, component and/or combination thereof.
In the present invention, the terms such as "lower" and the like refer to the position or positional relationship shown in the drawings, and are only terms of relationships determined for convenience of describing structural relationships between the components or elements of the present invention, and are not intended to refer to any component or element of the present invention, and are not to be construed as limiting the present invention.
In the present invention, terms such as "fixed", "connected", and the like are to be understood in a broad sense, and may be fixed, integrally connected, or detachably connected; may be directly connected or indirectly connected through an intermediate. The meaning of the above terms in the present invention can be determined according to specific situations by persons skilled in the art, and should not be construed as limiting the present invention.
Example one
As shown in fig. 1, the embodiment provides a power station boiler infrared temperature field temperature measurement system, including infrared temperature measuring device, infrared temperature measuring device includes first flange pipe fitting 1, flange bolt 2, sweeps ware 3, infrared temperature measurement camera lens 4, air cleaner 5, connecting piece 6, protective sheath 7, second flange pipe fitting 8 and explosion-proof pipe.
Wherein infrared temperature measurement camera lens is the host computer, is temperature measuring device's core device, and the connecting piece effect is the fastening camera lens, and the protective sheath plays cooling function, and the purger plays the cooling and blows the ash function, and the explosion-proof pipe is mainly connected host computer and air supply switch board, plays protect function.
The flange sleeve is provided with a hole in a gap of the water-cooled wall of the furnace wall and is welded and fixed, and the front end of the sleeve is fixedly and horizontally connected with the welding flange through bolts.
The signal output of the infrared non-contact temperature measuring device sequentially passes through the data transfer station 9 and the optical fiber 10 and reaches the control room 11. The signal output communication interface of the infrared non-contact temperature measuring device is as follows: 4-20mA, HART or RS-232, alarm synchronous output and entering the unit DCS system through interface in communication mode, and display and data reading and abnormal temperature fault alarm are realized through the boiler temperature field monitoring system picture of DCS operator station in the control room 11, as shown in figure 2.
Each infrared temperature measuring device of the whole system is provided with an on-site gas source control cabinet which is provided with an air filtering system and an overtemperature protection system for cooling and purging the instrument. The air source interface is butted by 0.5m 3 Min,0.6MPa compressed air, as shown in FIG. 3.
A plurality of temperature measuring devices are arranged in four directions perpendicular to the plane of the central axis of the boiler to form gridding measurement, so that the visualization of the temperature distribution in a measurement area is realized.
A power station boiler system based on an infrared temperature measuring device takes a third law of thermodynamics as a theoretical basis, temperature values obtained by an infrared temperature measuring instrument are in positive correlation with received radiation energy, gas has penetrability, and radiation on a line can be received on a light path of the temperature measuring device, so that the reading of the infrared temperature measuring instrument cannot be simply regarded as the temperature of a certain point in space, the comprehensive reflection of the temperature of each point on the line on the light path is realized, meanwhile, a plurality of infrared temperature measuring devices are arranged on a plane vertical to the axis of a boiler to carry out gridding measurement, and then, an algorithm reconstruction is carried out on the whole plane temperature field. The non-contact temperature measuring method does not contact with fuel and gas in a hearth in the temperature measuring process, has the characteristics of high reaction speed, wide measuring range, high measuring precision, capability of truly reflecting the temperature field distribution in the furnace by adopting a gridding measuring system and the like, and solves the problems that the temperature of the hearth of a boiler cannot be monitored on line during operation and the actual combustion condition of the hearth cannot be comprehensively and objectively reflected. Therefore, operation and maintenance personnel can accurately control the temperature uniformity of the hearth of the unit, prevent the boiler from being heated to expand and explode, accurately master the operation condition of the boiler, effectively control combustion, effectively protect a water-cooled wall, a superheater and a reheater, and play a role in effectively warning screen bottom coking and overtemperature of a heated surface.
The system can monitor the temperature field distribution of the hearth in real time and determine the central position of flame on line, prevent partial burning and coking, control the temperature uniformity of the hearth of the unit, and prevent the problems of uneven expansion and tube explosion of the boiler and the like; in the deep peak regulation of the boiler, the combustion condition of the hearth is correctly judged by monitoring the temperature field distribution of the hearth, and control reference is provided in the aspects of preventing fire extinguishment and saving fuel oil; in a starting boiler, the device system effectively monitors the temperature of smoke in a hearth and prevents the problems of pipe explosion and the like caused by overtemperature of the pipe wall; the occurrence of pipe explosion shutdown accidents is reduced; the temperature of the hearth flue gas can be effectively monitored during the operation of the boiler; by adopting corresponding measures (such as adjusting the angle of a nozzle, the coal feeding amount of a coal mill, primary secondary air and the like) by operating operators, the effects of improving the combustion efficiency of the boiler and reducing the temperature of exhaust smoke can be achieved, and the effect of preventing the center of flame from being burnt eccentrically can be achieved; the infrared temperature measuring device belongs to an online non-contact type, and has the characteristics of long service life (more than 10 years), low failure rate, no maintenance cost, light weight, convenience in installation, high precision and the like.
Example two
As shown in FIG. 4, the present embodiment obtains the average temperature on each thermometry path by arranging a plurality of measuring points perpendicular to the plane of the boiler and integrating on each path. And then the temperature measuring area is evenly divided into a plurality of grids to form a matrix type measuring grid, so that the distribution condition of the two-dimensional plane temperature field is obtained. The method comprises the following specific steps:
the first step is as follows: according to the relation between the radiation energy and the object temperature and the Planck's law, the surface temperature of the object is calculated according to the infrared radiation of the flue gas, and the average temperature of each temperature measuring path is obtained by integrating on each path.
The second step is that: the method comprises the steps of measuring in four directions of the same plane by using an infrared temperature measuring device, uniformly dividing a temperature measuring area into a plurality of grids to form a matrix type measuring grid, and obtaining the average temperature of each grid by using a discrete area method.
The third step: and then, obtaining the temperature value of any point in the region to be measured by utilizing an interpolation method, thereby obtaining the distribution condition of the whole two-dimensional temperature field.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A power station boiler infrared temperature field temperature measurement system is characterized by comprising infrared non-contact temperature measurement devices, wherein the infrared non-contact temperature measurement devices are arranged in four directions vertical to the plane of a central axis of a boiler;
the infrared non-contact temperature measuring device comprises a light transmission channel, a connecting piece and an infrared temperature measuring lens, wherein the light transmission channel is connected with the infrared temperature measuring lens through the connecting piece.
2. The utility boiler infrared temperature field temperature measurement system of claim 1, characterized in that, the light transmission channel includes a first flanged pipe and a second flanged pipe, the first flanged pipe is opened in the furnace wall water wall gap and welded.
3. The utility boiler infrared temperature field temperature measurement system of claim 2, characterized in that the first flanged pipe fitting is connected with the second flanged pipe fitting through a flange bolt.
4. The utility boiler infrared temperature field temperature measurement system of claim 1, characterized in that a blower is mounted on the outer wall of the light transmission channel.
5. The utility boiler infrared temperature field temperature measurement system of claim 1, characterized in that a protective sleeve is provided outside the infrared temperature measurement lens.
6. The utility boiler infrared temperature field temperature measurement system of claim 5, characterized in that an air filter is arranged below the protective jacket.
7. The utility boiler infrared temperature field temperature measurement system of claim 1, characterized in that the infrared temperature measurement lens is connected with the control room through a communication interface.
8. The power boiler infrared temperature field temperature measurement system of claim 7, wherein the communication interface is HART or RS-232 communication.
9. The utility boiler infrared temperature field temperature measurement system of claim 7, characterized in that the control room is connected to an alarm.
10. The utility boiler infrared temperature field temperature measurement system of claim 7, characterized in that the control room is connected to a display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222051476.0U CN217786354U (en) | 2022-08-04 | 2022-08-04 | Power station boiler infrared temperature field temperature measurement system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222051476.0U CN217786354U (en) | 2022-08-04 | 2022-08-04 | Power station boiler infrared temperature field temperature measurement system |
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| Publication Number | Publication Date |
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| CN217786354U true CN217786354U (en) | 2022-11-11 |
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| CN202222051476.0U Active CN217786354U (en) | 2022-08-04 | 2022-08-04 | Power station boiler infrared temperature field temperature measurement system |
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- 2022-08-04 CN CN202222051476.0U patent/CN217786354U/en active Active
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