CN214641702U - Wall temperature construction device for heating surface of ultra-supercritical boiler - Google Patents
Wall temperature construction device for heating surface of ultra-supercritical boiler Download PDFInfo
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- CN214641702U CN214641702U CN202023278447.5U CN202023278447U CN214641702U CN 214641702 U CN214641702 U CN 214641702U CN 202023278447 U CN202023278447 U CN 202023278447U CN 214641702 U CN214641702 U CN 214641702U
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- thermometer
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Abstract
The utility model discloses a wall temperature construction device for a heating surface of an ultra-supercritical boiler, which comprises a heat collection block, a thermocouple, a thermometer, a groove box, a protective sleeve and a boiler pipe, wherein the heat collection block is fixedly arranged on the surface of the boiler pipe, and the thermometer is inserted into the inner cavity of the boiler pipe; the utility model discloses a setting of groove box and protective case, the groove box will be considered the installation of temperature element after drawing forth the housing fixed, suitably increase groove box width, concentrate the principle as far as possible according to the shortest path, avoid the manhole, the access hole, areas such as explosion-proof door and peephole, it is big to avoid the temperature change, the big region of vibration, and high temperature pipeline, equipment leaves heat preservation 300 mm's distance, install not destroyed by cross operation for ensureing temperature element, increase one section about 500 mm's protective case and draw forth the heat preservation, install in the middle of the water-cooling wall because of this part thermometer, must accomplish before boiler hydrostatic test, temperature element's jack needs to be protected with the sticky tape and avoids rubbish to block up.
Description
Technical Field
The application relates to the technical field of thermal power generation equipment, in particular to a wall temperature construction device for a heating surface of an ultra-supercritical boiler.
Background
At present, domestic power supply mainly depends on thermal power generation, pipe explosion on a high-temperature heating surface of a large thermal generator set boiler is one of important factors causing forced shutdown of the set, and most of pipes are caused by overtemperature of a pipe wall and improper measures in an installation process, so that the running state of the heating surface and the safety of the boiler can be correctly judged by accurately grasping the wall temperature distribution condition of the high-temperature heating surface and taking care of the measures in the installation process.
Due to technological progress and environmental protection requirements, power stations built in recent years are all high-power supercritical units, so that the detection requirements on the metal temperature of tube panels of a boiler water wall, a superheater, a reheater and the like are higher, the temperature of the boiler tube wall can be accurately measured, the installation of a thermocouple is an important link, and a boiler wall temperature installation construction method is compiled through installation practices and summary experiences for many years.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an ultra supercritical boiler receives hot side wall temperature construction equipment possesses and enables to conceal the reasonable arrangement that the engineering construction is more reasonable, guarantee cross operation, ensures construction safety, efficient advantage to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a wall temperature construction device for a heating surface of an ultra-supercritical boiler comprises a heat collection block, a thermocouple, a thermometer, a tank box, a protective sleeve and a boiler pipe, wherein the heat collection block is fixedly installed on the surface of the boiler pipe, the thermometer is inserted into the inner cavity of the boiler pipe, the thermocouple is fixedly installed on the inner wall of the tank box, and the protective sleeve is sleeved on the surface of the thermometer.
Preferably, the heat collecting block is made of stainless steel materials, and the heat collecting block is hooped and fixed on the surface of the boiler pipe.
Preferably, the heat collecting block is applicable to boiler tube diameters in three forms: a diameter of 60mm or less, a diameter of 200mm or less and a diameter of 200mm or more.
Preferably, the boiler tube has a wall thickness of 6.5mm, and the thermometer insertion hole is required to be formed in the center of the wall of the boiler tube.
Preferably, the length of the protective sleeve is 500 mm.
Preferably, the protective sleeve is DN 20-25 pipe diameters, and 1-3 thermometers penetrate through each protective sleeve.
Preferably, when the heat collecting block is welded, a proper welding material is selected, the carbon steel is generally 12Cr1MoV and 15Cr1MoV, the alloy steel is an A312 stainless steel welding rod, the stainless steel material is an A302 welding material, and the T91 and 92 materials are nickel-based welding materials.
Preferably, when the heat collecting blocks are installed on the material T91, 92, the pipe at the installation position is preheated before welding, and the preheating temperature needs to reach 300 ℃.
Preferably, the heat collecting block is installed in parallel with the boiler tube, and a vertical installation is selected if it is satisfied that the heat collecting block is installed vertically.
Preferably, the thermocouple adopts a double-armored thermocouple, the graduation is K, E graduation, the temperature measuring range is 0-600 or 800 degrees, and the length of the armored thermocouple wire is 5, 10, 20 or 25 meters.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
the utility model discloses a setting of groove box and protective case, the groove box will be considered the installation of temperature element after drawing forth the housing fixed, suitably increase groove box width, concentrate the principle as far as possible according to the shortest path, avoid the manhole, the access hole, areas such as explosion-proof door and peephole, it is big to avoid the temperature change, the big region of vibration, and high temperature pipeline, equipment leaves heat preservation 300 mm's distance, install not destroyed by cross operation for ensureing temperature element, increase one section about 500 mm's protective case and draw forth the heat preservation, install in the middle of the water-cooling wall because of this part thermometer, must accomplish before boiler hydrostatic test, temperature element's jack needs to be protected with the sticky tape and avoids rubbish to block up.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the installation of the heat collecting block of the present invention;
FIG. 3 is a schematic view of the thermometer of the present invention;
FIG. 4 is a schematic view of the thermocouple installation of the present invention;
FIG. 5 is a schematic view of the heat treatment curve of the boiler tube according to the present invention.
In the figure: 1. a heat collection block; 2. a thermocouple; 3. a thermometer; 4. a slot box; 5. protecting the sleeve; 6. boiler tubes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides an ultra supercritical boiler heating surface wall temperature construction equipment, including thermal-arrest piece 1, thermocouple 2, thermometer 3, groove box 4, protective case 5 and boiler pipe 6, thermal-arrest piece 1 fixed mounting boiler pipe 6's surface, thermometer 3 pegs graft in boiler pipe 6's inner chamber, thermocouple 2 fixed mounting is in the inner wall of groove box 4, protective case 5 cup joints in thermometer 3's surface, thermal-arrest piece 1 generally adopts stainless steel material processing to make, the boiler pipe 6 diameter that thermal-arrest piece 1 is suitable for mainly has three kinds of forms: the diameter is below 60mm, the diameter is below 200mm and the diameter is above 200mm, the heat collecting block 1 is hooped and fixed on the surface of the boiler tube 6, the heat collecting block 1 is matched with the metal base material, in order to better increase the contact area and ensure the measurement accuracy, the proper heat collecting block 1 is selected according to the diameter of the boiler tube 6, the marked boiler tube 6 is polished and cleaned, the installation can be carried out only when the aperture of the heat collecting block 1 is determined to meet the requirement, the gap can not be larger than 1mm, and the heat collecting block can be welded on the metal surface in a tight fit manner after being smooth and free of impurities;
the wall thickness of a boiler pipe 6 is 6.5mm, a thermometer 3 inserting hole needs to be formed in the center of the pipe wall of the boiler pipe 6, the wall thickness of a common water-cooled wall pipe is 6.5mm, a thermometer 3 inserting hole needs to be formed in the center of the pipe wall, the pressure-bearing strength of the pipe can be ensured only by ensuring the position accuracy, a special positioning punching machine is adopted for punching, or a manufacturer is requested to separately supply and process the pipe sections, measuring elements with the diameter of less than 2mm are generally selected for the wall temperature, a fixing metal wire is arranged at the front end of each measuring element and used for fixing the thermometer 3 on the inner wall of a heated surface, and the fixing metal wire is extremely fine, so that the measuring elements can be installed only when the mechanical installation conditions are met, and redundant metal wires need to be cut off when the inner wall of a hearth is welded;
the length of the protective sleeve 5 is 500mm, the protective sleeve 5 has the diameter of DN 20-25, 1-3 thermometers 3 penetrate through each protective sleeve 5, in order to ensure that the temperature element is installed and is not damaged by cross operation, a section of protective sleeve 5 with the diameter of about 500mm is added to lead out a heat preservation layer, the thermometer is installed in the middle of a water-cooled wall and must be completed before a boiler hydrostatic test, and jacks of the temperature element need to be protected by adhesive tapes to avoid garbage blockage;
when the heat collection block 1 is welded, proper welding materials are selected, the carbon steel is generally 12Cr1MoV and 15Cr1MoV, the alloy steel is A312 stainless steel welding rod, the stainless steel material is A302 welding material, the T91 and 92 materials are nickel-based welding materials, when the heat collection block 1 is installed on the T91 and 92 materials, the pipe at the installation position is preheated before welding, the preheating temperature needs to reach 300 ℃, the heat collection block 1 and the boiler pipe 6 are installed in parallel, and if the vertical installation of the heat collection block 1 can be met, the vertical installation is selected;
the thermocouple 2 adopts a double-armored thermocouple, the graduation is K, E graduation, the temperature measuring range is 0-600 or 800 degrees, the length of an armored thermocouple wire is 5, 10, 20 or 25 meters, the diameter is 4-6 mm, the temperature is adjusted according to the distance from a detection point to a lead-out high-temperature housing, and the thermocouple can be installed after the equipment name label is qualified and hung;
the space required by thermal expansion of boiler equipment and shaking of pipes is considered when the boiler wall temperature groove box 4 is installed, the expansion distance and height of the boiler equipment are considered at the position where the boiler and steel frame equipment move freely, the groove box 4 is flexibly connected, expansion joints are additionally manufactured, the size of the installation groove box 4 is determined according to the number of temperature elements, generally 100 × 150 is installed below 10, 200 × 150 is installed below 20, 300 × 150 is installed below 50, 400 × 150 is installed below 100, 600 × 150 can be selected as the total collection line groove box 4, so that the thermometer junction box can be conveniently fixed, all the groove box 4 assembly connecting sheets in the furnace top cover shell can be free of mounting fixed screws at 4-5 meters, expansion activity is reserved at the connecting positions and the collection lines to prevent the temperature elements from being pulled, the installation and fixation of the temperature elements are considered after the groove box 4 is drawn out of the cover shell, the width of the groove box 4 is properly increased, according to the principle that the shortest path is concentrated as much as possible, avoiding the areas such as a manhole, an access hole, an explosion door, a peephole and the like, avoiding the area with large temperature change and large vibration, and keeping away from a high-temperature pipeline and equipment by the distance of 300 mm;
when the thermocouple 2 is installed, the drawing paper design is checked again, an expansion bend is formed between the detection point and the protection tube, enough length is reserved at a place with special settlement according to settlement data, a metal hose is used for connecting the detection point and the protection tube from an outlet of the tank box, the temperature element is guaranteed not to be exposed, the leading-out end of the temperature element is laid in the tank box and is tidy and attractive, a telescopic space is reserved, enough radian is guaranteed at the bend and is not bent suddenly, the element junction box is installed on the outer side of the tank box according to the sequence number of tube screens on equipment, the neatness and the attractiveness are guaranteed, the maintenance is convenient, the terminal of the temperature element is subjected to heating inspection after the installation is finished, and whether errors exist or not is determined;
the front end I/O cabinet generally selects places convenient for maintenance such as the edge of an overhaul platform or a walkway, construction is carried out according to the standard of installation of the plate cabinet, a compensation lead is far away from a strong electromagnetic interference area as far as possible when laid, a power cable is not laid in the wall temperature cable trough box 4, the compensation lead is generally red and black, the red is connected with the anode of the thermometer 3 and the black is connected with the cathode during wiring, a heat-shrinkable sleeve is adopted for manufacturing a cable head, the manufacturing process is the same as that of a low-voltage cable, and a shielding layer is connected to a special contact network at the side of the plate cabinet.
The working principle is as follows: a user installs a heat collection block 1 on the surface of a boiler pipe 6 in the construction process, the heat collection block 1 and the boiler pipe 6 are installed in parallel, if the heat collection block 1 can be installed vertically as much as possible, the marked pipe is polished and cleaned, the heat collection block 1 can be installed only when the aperture of the heat collection block 1 meets the requirement and the gap can not be larger than 1mm, the heat collection block can be welded tightly to the metal surface after being smooth and free of impurities, then a thermometer 3 is installed, an insertion hole of the thermometer 3 needs to be opened in the center of the pipe wall of the boiler pipe 6, the wall thickness of a common water wall pipe is 6.5mm, an insertion hole of the thermometer 3 needs to be opened in the center of the pipe wall, the pressure-bearing strength of the pipe can be ensured only when the position is accurate, the temperature is excavated by adopting a special positioning puncher, or a manufacturer is requested to independently supply a processed pipe section, the wall temperature generally selects a measuring element with the diameter of less than 2mm, and the front end of the temperature measuring element is provided with a fixed metal wire, the thermometer is used for fixing the thermometer 3 on the inner wall of a heated surface, because the metal wire for fixing is extremely thin, the thermometer can be installed only when the mechanical installation condition is met, when the inner wall of a hearth is welded, redundant metal wires need to be cut off, then the protective sleeve 5 is installed, in order to ensure that the temperature element is installed well and cannot be damaged by cross operation, a section of protective sleeve 5 with the thickness of about 500mm needs to be added to lead out a heat insulation layer, because the part of the thermometer is installed in the middle of a water-cooled wall, the thermometer needs to be completed before a boiler hydrostatic test, and jacks of the temperature element need to be protected by adhesive tapes to avoid garbage blockage.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (9)
1. The utility model provides a supercritical boiler heating surface wall temperature construction equipment, includes thermal-arrest piece (1), thermocouple (2), thermometer (3), groove box (4), protective case (5) and boiler pipe (6), its characterized in that: the heat collecting block (1) is fixedly arranged on the surface of a boiler pipe (6), the thermometer (3) is inserted into the inner cavity of the boiler pipe (6), the thermocouple (2) is fixedly arranged on the inner wall of the groove box (4), and the protective sleeve (5) is sleeved on the surface of the thermometer (3).
2. The wall temperature construction device for the heating surface of the supercritical boiler according to claim 1, characterized in that: the heat collecting block (1) is made of stainless steel materials, and the heat collecting block (1) is hooped and fixed on the surface of a boiler pipe (6).
3. The wall temperature construction device for the heating surface of the supercritical boiler according to claim 1, characterized in that: the diameters of boiler tubes (6) applicable to the heat collecting blocks (1) mainly have three forms: a diameter of 60mm or less, a diameter of 200mm or less and a diameter of 200mm or more.
4. The wall temperature construction device for the heating surface of the supercritical boiler according to claim 1, characterized in that: the wall thickness of the boiler tube (6) is 6.5mm, and the thermometer (3) inserting hole needs to be formed in the center of the wall of the boiler tube (6).
5. The wall temperature construction device for the heating surface of the supercritical boiler according to claim 1, characterized in that: the length of the protective sleeve (5) is 500 mm.
6. The wall temperature construction device for the heating surface of the supercritical boiler according to claim 1, characterized in that: the protective sleeves (5) are DN 20-25 in diameter, and 1-3 thermometers (3) penetrate through each protective sleeve (5).
7. The wall temperature construction device for the heating surface of the supercritical boiler according to claim 1, characterized in that: when the heat collection block (1) is welded, proper welding materials are selected, the carbon steel is generally 12Cr1MoV and 15Cr1MoV, the alloy steel is an A312 stainless steel welding rod, the stainless steel material is an A302 welding material, and the T91 and 92 materials are nickel-based welding materials.
8. The wall temperature construction device for the heating surface of the supercritical boiler according to claim 1, characterized in that: the heat collecting block (1) is installed in parallel with the boiler pipe (6), and if the heat collecting block (1) can be installed vertically, the vertical installation is selected.
9. The wall temperature construction device for the heating surface of the supercritical boiler according to claim 1, characterized in that: the thermocouple (2) adopts double armored thermocouples, the graduation is K, E graduation, the temperature measuring range is 0-600 or 800 degrees, and the length of the armored thermocouple wires is 5, 10, 20 or 25 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023278447.5U CN214641702U (en) | 2020-12-29 | 2020-12-29 | Wall temperature construction device for heating surface of ultra-supercritical boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023278447.5U CN214641702U (en) | 2020-12-29 | 2020-12-29 | Wall temperature construction device for heating surface of ultra-supercritical boiler |
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| Publication Number | Publication Date |
|---|---|
| CN214641702U true CN214641702U (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023278447.5U Active CN214641702U (en) | 2020-12-29 | 2020-12-29 | Wall temperature construction device for heating surface of ultra-supercritical boiler |
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| CN (1) | CN214641702U (en) |
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