CN215523375U - Device for continuously monitoring inner wall temperature of water-cooled wall furnace of power station boiler furnace - Google Patents
Device for continuously monitoring inner wall temperature of water-cooled wall furnace of power station boiler furnace Download PDFInfo
- Publication number
- CN215523375U CN215523375U CN202122208594.3U CN202122208594U CN215523375U CN 215523375 U CN215523375 U CN 215523375U CN 202122208594 U CN202122208594 U CN 202122208594U CN 215523375 U CN215523375 U CN 215523375U
- Authority
- CN
- China
- Prior art keywords
- wall
- water
- furnace
- temperature
- boiler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
A device for continuously monitoring the temperature of the inner wall of a water-cooled wall of a hearth of a power station boiler. At present, due to the severe environment of high temperature and high ash in the boiler, the deviation condition of the wall temperature of the water cooling wall in the boiler is reflected by the side surface of the wall temperature of the water cooling wall at the beginning of the inlet of the middle header of the water cooling wall which is monitored outside the boiler, the wall temperature is greatly different from the real wall temperature of the water cooling wall in the boiler, and even if a small number of wall temperature measuring points are arranged in the boiler, the service life and the measuring precision can not be ensured under the environment of high temperature and high ash. The utility model comprises the following components: the heat collecting device comprises a heat collecting block (2) and an armored thermocouple (5), wherein the heat collecting block is installed on the surface of a hearth water wall (1), the armored thermocouple is arranged inside the heat collecting block, the hearth water wall comprises a plurality of water wall tubes (101) and fins (102) connected with the adjacent water wall tubes, the inner arc surface (203) of the heat collecting block is tightly attached to the outer wall of the water wall tube on the inner side of a hearth, and the circumferential end (206) of the heat collecting block is welded and fixed with the fins. The utility model is used for monitoring the temperature of the inner wall of the water-cooled wall of the boiler hearth.
Description
Technical Field
The utility model relates to the technical field of power station boilers, in particular to a device for continuously monitoring the temperature of the inner wall of a water-cooled wall furnace of a hearth of a power station boiler.
Background
The power industry enters a high-speed development period, the coal-fired unit of a power plant rapidly develops to a large capacity and a high parameter, and the supercritical and ultra-supercritical unit with the rated power generation more than 600MW gradually becomes the leading direction of the current coal-fired unit. However, with the improvement of the boiler capacity and parameters, especially the improvement of steam parameters, the problem of over-temperature explosion leakage of the water wall and the superheater on the upper part of the boiler furnace is more prominent, on one hand, in the supercritical (super) critical unit boiler, due to the large capacity of the boiler, the non-uniformity of the distribution of the flue gas temperature and the flow velocity along the width direction and the height direction of the flue and the non-uniformity of the flow distribution of the steam along all the tubes exist in different degrees, so that the water wall and the superheater pipeline are easy to generate local thermal deviation and are in an over-temperature or service condition deterioration state for a long time, and the water wall or the superheater pipeline can fail in serious cases.
On the other hand, because the peak shaving of the ultra (supercritical) unit needs frequent load regulation, particularly with the participation of the coal-fired thermal power unit in deep peak shaving in recent years, when the variable load operation is carried out, the conditions of inconsistent regulation and matching of a water supply control system, a fuel control system and the like can occur, and further, the conditions of uneven heating of a water wall or overhigh local heat load caused by reasons such as combustion fluctuation, unstable water power or the structure of a hearth and the like can occur, so that the wall temperature of the local water wall is over-high.
Therefore, the monitoring of the wall temperature of the water cooling wall in the furnace is very important. Because of the severe environment of high temperature and high ash in the boiler, the wall temperature of the water cooling wall at the inlet of the middle header of the water cooling wall is monitored outside the boiler, the deviation condition of the wall temperature of the water cooling wall in the boiler is reflected on the side surface, and the wall temperature is greatly different from the real wall temperature of the water cooling wall in the boiler. Therefore, a continuous monitoring device for the wall temperature of the water-cooled wall in the boiler of the utility boiler is urgently needed, and aims to prolong the service life on the basis of ensuring the measurement precision, so that the wall temperature state of the water-cooled wall of the hearth of the utility boiler can be continuously monitored for a long period.
Disclosure of Invention
The utility model aims to provide a device for continuously monitoring the temperature of the inner wall of a water-cooled wall of a hearth of a power station boiler.
The above purpose is realized by the following technical scheme:
the utility model provides a power plant boiler furnace water-cooling wall furnace inner wall temperature continuous monitoring device which constitutes and includes: the furnace comprises a heat collection block and an armored thermocouple, wherein the heat collection block is installed on the surface of a water wall of a furnace, the armored thermocouple is arranged in the heat collection block, the water wall of the furnace comprises a plurality of water wall tubes and fins connected with the adjacent water wall tubes, the inner arc surface of the heat collection block is tightly attached to the outer walls of the water wall tubes on the inner side of the furnace, the circumferential end part of the heat collection block is welded and fixed with the fins, an axial reserved hole is formed in the heat collection block, the measuring end of the armored thermocouple extends into the reserved hole to be fixed, the extending end of the armored thermocouple is tightly attached to the water wall tubes, the armored thermocouple is led out of the furnace through holes in the fins and connected to a temperature collection system, a part, close to the water wall tubes, of the armored thermocouple is covered with a protective cover plate, and the protective cover plate is welded and fixed with the fins.
According to the device for continuously monitoring the temperature of the inner wall of the water-cooled wall of the hearth of the power station boiler, the thickness of the heat collecting block is 8-12 mm, the outer diameter of the armored thermocouple is 4-8 mm, the hole depth of the reserved hole is 1/2-2/3 of the height of the heat collecting block, and the hole diameter of the reserved hole is slightly larger than the outer diameter of the armored thermocouple.
The continuous monitoring device for the temperature of the inner wall of the water-cooled wall of the hearth of the power station boiler is characterized in that the heat collection block is divided into an upper half part and a lower half part, the arc length of the upper half part is 1/4 with the circumferential length, the arc length of the lower half part is consistent with the arc length of the outer side of the water-cooled wall, the circumferential end part of the lower half part of the heat collection block is fixedly welded with the fins, threaded holes are formed in two circumferential sides of the upper half part of the heat collection block, and the armored thermocouple is fixedly matched with the threaded holes through screws.
The device for continuously monitoring the temperature of the inner wall of the water-cooled wall of the hearth of the power station boiler is characterized in that a channel is reserved on the protective cover plate, the depth of the channel is equal to the diameter of the armored thermocouple, and the channel is attached to the outer surface of the armored thermocouple in a radian mode.
Has the advantages that:
the utility model relates to a device for continuously monitoring the temperature of the inner wall of a water wall of a hearth of a power station boiler, which has the advantages of compact structure, large contact surface with the water wall tube, good heat dissipation condition, relatively low temperature of a thermocouple environment and long service life.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a heat collection block;
in the figure: 1. the heat collecting device comprises a hearth water wall, 101, water wall pipes, 102, fins, 2, a heat collecting block, 201, an upper half portion, 202, a lower half portion, 203, an inner arc surface, 204, threaded holes, 205, reserved holes, 206, a circumferential end portion, 3, screws, 4, a protective cover plate, 5 and an armored thermocouple.
The specific implementation mode is as follows:
example 1:
the utility model provides a power plant boiler furnace water-cooling wall furnace inner wall temperature continuous monitoring device which constitutes and includes: the furnace comprises a heat collection block 2 and an armored thermocouple 5, wherein the heat collection block is installed on the surface of a furnace water wall 1, the armored thermocouple is arranged inside the heat collection block, the furnace water wall comprises a plurality of water wall tubes 101 and fins 102 connected with adjacent water wall tubes, the inner arc surface 203 of the heat collection block is tightly attached to the outer walls of the water wall tubes on the inner side of the furnace, the circumferential end 206 of the heat collection block is welded and fixed with the fins, an axial reserved hole 205 is formed in the heat collection block, the measuring end of the armored thermocouple extends into the reserved hole to be fixed, the extending end of the armored thermocouple is tightly attached to the water wall tubes, the outer furnace is led out through holes in the fins and connected to a temperature collection system, a protective cover plate 4 covers the part of the armored thermocouple tightly attached to the water wall tubes, and the protective cover plate is welded and fixed with the fins.
Example 2:
according to the device for continuously monitoring the temperature of the inner wall of the water-cooled wall of the hearth of the power station boiler in the embodiment 1, the thickness of the heat collecting block is 8 mm-12mm, the outer diameter of the armored thermocouple is 4 mm-8 mm, the hole depth of the reserved hole is 1/2-2/3 of the height of the heat collecting block, and the hole diameter of the reserved hole is slightly larger than the outer diameter of the armored thermocouple.
Example 3:
according to the device for continuously monitoring the temperature of the inner wall of the water wall of the hearth of the power station boiler in the embodiment 1, the heat collection block is divided into an upper half part 201 and a lower half part 202, the arc length of the upper half part is 1/4 with the circumferential length, the arc length of the lower half part is consistent with the arc length of the outer side of the water wall, the circumferential end part of the lower half part of the heat collection block is fixedly welded with the fins, threaded holes 204 are formed in two circumferential sides of the upper half part of the heat collection block, and an armored thermocouple is fixedly matched with the threaded holes through screws 3.
Example 4:
according to the continuous monitoring device for the temperature of the inner wall of the water-cooled wall furnace of the power station boiler furnace, in the embodiment 1, the protective cover plate is provided with the groove channel in advance, the depth of the groove channel is equal to the diameter of the armored thermocouple, and the radian of the groove channel is attached to the outer surface of the armored thermocouple, so that the armored thermocouple is fully contacted with the protective cover plate, and the heat dissipation effect of working medium flowing in the water-cooled wall tube on the armored thermocouple is improved;
in order to facilitate the welding of the heat collecting block, the protective cover plate and the fins, the expansion rates of the furnace water wall and the heat collecting block are close to each other, the local stress generated by nonuniform thermal expansion is reduced, and the materials of the heat collecting block and the protective cover plate are the same as those of the water wall pipe;
in order to avoid temperature distortion and fluctuation caused by the fact that high-temperature flue gas enters the thermocouple heat collecting block, a small amount of high-temperature glue is coated in a reserved channel before the protection cover plate is installed, and after the thermocouple heat collecting block, the protection cover plate and the fins are welded, the periphery of the protection cover plate is coated with the high-temperature glue for sealing.
Claims (4)
1. The utility model provides a power plant boiler furnace water-cooling wall furnace inner wall temperature continuous monitoring device which constitutes and includes: thermal-arrest piece and armor thermocouple, characterized by: the furnace water-cooling wall comprises a furnace water-cooling wall and fins connected with the adjacent water-cooling wall, the inner arc surface of the heat collection block is tightly attached to the outer wall of the water-cooling wall on the inner side of the furnace, the circumferential end part of the heat collection block is welded and fixed with the fins, an axial reserved hole is formed in the heat collection block, the measuring end of the armored thermocouple extends into the reserved hole to be fixed, the extending end of the armored thermocouple is tightly attached to the water-cooling wall, the outer furnace is led out through holes in the fins and connected to a temperature collection system, a part of the armored thermocouple, which is tightly attached to the water-cooling wall, is covered with a protective cover plate, and the protective cover plate is welded and fixed with the fins.
2. The utility boiler furnace water wall furnace inner wall temperature continuous monitoring device of claim 1, characterized by: the thickness of the heat collecting block is 8 mm-12mm, the outer diameter of the armored thermocouple is 4 mm-8 mm, the hole depth of the reserved hole is 1/2-2/3 of the height of the heat collecting block, and the hole diameter of the reserved hole is slightly larger than the outer diameter of the armored thermocouple.
3. The utility boiler furnace water wall furnace inner wall temperature continuous monitoring device of claim 1, characterized by: the heat collection block is divided into an upper half portion and a lower half portion, the arc length of the upper half portion is 1/4 with the circumference, the arc length of the lower half portion is consistent with the arc length of the outer side of the water wall, the circumferential end portion of the lower half portion of the heat collection block is fixedly welded with the fins, threaded holes are formed in two circumferential sides of the upper half portion of the heat collection block, and the armored thermocouple is fixedly matched with the threaded holes through screws.
4. The utility boiler furnace water wall furnace inner wall temperature continuous monitoring device of claim 1, characterized by: a groove channel is reserved on the protective cover plate, the depth of the groove channel is equal to the diameter of the armored thermocouple, and the radian of the groove channel is fit with the outer surface of the armored thermocouple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122208594.3U CN215523375U (en) | 2021-09-13 | 2021-09-13 | Device for continuously monitoring inner wall temperature of water-cooled wall furnace of power station boiler furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122208594.3U CN215523375U (en) | 2021-09-13 | 2021-09-13 | Device for continuously monitoring inner wall temperature of water-cooled wall furnace of power station boiler furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215523375U true CN215523375U (en) | 2022-01-14 |
Family
ID=79796814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122208594.3U Expired - Fee Related CN215523375U (en) | 2021-09-13 | 2021-09-13 | Device for continuously monitoring inner wall temperature of water-cooled wall furnace of power station boiler furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215523375U (en) |
-
2021
- 2021-09-13 CN CN202122208594.3U patent/CN215523375U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101372898A (en) | Method and apparatus for clearance control of turbine blade tip | |
| CN113432103A (en) | Superheated steam heat exchange system | |
| CN110886665B (en) | Stirling engine-based high-temperature tail gas waste heat utilization device and Stirling engine | |
| CN215523375U (en) | Device for continuously monitoring inner wall temperature of water-cooled wall furnace of power station boiler furnace | |
| CN103307401B (en) | Double water-cooled expansion joint | |
| CN101813372B (en) | Pressure-bearing high-temperature air electric heater | |
| CN219776431U (en) | High-temperature gas-gas heat exchanger | |
| CN112066353A (en) | Device and method for monitoring wall temperature of heat exchange tube in furnace by adopting compressed air cooling protection | |
| CN106769814B (en) | Low-temperature corrosion detection system and detection method thereof | |
| CN207439679U (en) | A kind of combustor test equipment and its measurement pipeline section | |
| CN105466645A (en) | System and method for quickly detecting air leakage factor of boiler tail flue | |
| CN211952812U (en) | Heat transfer adjusting device for flue gas water cooler | |
| CN215637098U (en) | Device for measuring temperature of fire-facing side wall of water-cooled wall of boiler | |
| CN112903275B (en) | Sectional type pull rod sealing system for thermal engine coupling fatigue test of blade | |
| CN108613159A (en) | A kind of intermediate header being suitable for super critical boiler underload flexibility operation | |
| CN107576504A (en) | A kind of combustor test equipment and its measurement pipeline section | |
| CN210088910U (en) | Secondary air pipe device for preventing water-cooled wall of boiler from tube explosion | |
| CN210219733U (en) | Wear-resisting type over heater device is stabilized to high efficiency | |
| CN210423813U (en) | Four-way valve for switching between high-temperature flue gas without air channeling and air | |
| CN210664042U (en) | Gas turbine combined heat and power system for oil field | |
| CN106301084A (en) | The temperature difference electricity generation device of high temperature fluid in a kind of utilization | |
| CN114719241B (en) | Boiler with heat exchange cover, use method of boiler and thermal power unit | |
| CN214501256U (en) | High-temperature corrosion detection system for flue gas of waste incinerator | |
| CN104180367A (en) | Slagging tube of fluidized-bed boiler | |
| CN112268613A (en) | Vibration sensing system with cooling shell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220114 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |