CN112361325A - Overheating device and manufacturing method thereof - Google Patents
Overheating device and manufacturing method thereof Download PDFInfo
- Publication number
- CN112361325A CN112361325A CN202011179906.6A CN202011179906A CN112361325A CN 112361325 A CN112361325 A CN 112361325A CN 202011179906 A CN202011179906 A CN 202011179906A CN 112361325 A CN112361325 A CN 112361325A
- Authority
- CN
- China
- Prior art keywords
- welding
- build
- superheating
- overheating
- steam soot
- 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.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
- F22G3/008—Protection of superheater elements, e.g. cooling superheater tubes during starting-up periods, water tube screens
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
Abstract
The invention provides a superheating device and a manufacturing method thereof, wherein the superheating device comprises a plurality of superheating components which are arranged side by side, each superheating component comprises a superheating pipe and a plurality of steam soot blowers, a plurality of surfacing areas are arranged on the surface of each superheating pipe, and the surfacing areas are respectively arranged at positions close to the steam soot blowers. It is through welding corrosion-resistant build-up welding layer on superheater tube surface for the build-up welding layer has higher hardness, better corrosion resisting property, in order to reduce overheated subassembly's maintenance cost.
Description
Technical Field
The invention relates to the technical field of boilers, in particular to a superheating device and a manufacturing method thereof.
Background
The condition that the flue is blocked by ash slag often appears in the overheating components of the boiler, so that the existing boilers are all provided with steam soot blowers to clean the ash slag. In order to avoid blowing damage to a boiler superheater tube caused by a steam soot blower in a boiler, the installation of an anti-abrasion tile is the most widely applied protection method in the protection of the existing boiler superheater assembly. The wear-resistant tile is generally made of a 4mm austenitic stainless steel plate, is formed by pressing, and is clamped in the overheating assembly by welding.
During the operation of the boiler, the temperature of the flue gas at the overheating components is as high as 600 ℃, and a large amount of acidic and chloride corrosive media are contained in the flue gas. The abrasion-proof tile is subjected to the combined action of thermal corrosion, chemical corrosion and high-pressure blowing of the steam soot blower in the environment of 600 ℃, the abrasion-proof tile is easy to corrode, the service life of the abrasion-proof tile is short, the abrasion-proof tile cannot be replaced in time during the operation of the boiler, and the superheater tube of the boiler is easy to thin and explode. The damaged anti-abrasion tile needs to be replaced when the furnace is shut down every time, and a large amount of manpower, material resources and time are consumed.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a superheater and a method for manufacturing the same, which can reduce the repair cost of the superheater component by welding a weld overlay on the surface of the superheater tube so that the weld overlay has higher hardness and better corrosion resistance.
The embodiment of the invention adopts the technical scheme that:
on one hand, the embodiment of the invention provides a superheating device which comprises a plurality of superheating components which are arranged side by side, wherein each superheating component comprises a superheating pipe and a plurality of steam soot blowers, a plurality of surfacing areas are arranged on the surface of each superheating pipe, and the surfacing areas are respectively arranged at positions close to the steam soot blowers.
One or more technical schemes provided in the embodiment of the invention have at least the following beneficial effects: compared with a superheating assembly in the prior art, the steam soot blower is arranged near the superheating pipe, so that ash in the superheating device can be cleaned, and the situation that the ash blocks a flue is prevented; moreover, the surface of the superheater tube is provided with a plurality of surfacing areas, so that the surfacing layer has higher hardness and better corrosion resistance, and the overhaul cost of the superheater assembly is reduced; it can be seen that the effect of the weld overlay area is: the hardness and the corrosion resistance of the superheater tube are improved, and the tube explosion accident is prevented. Therefore, the invention has simple and reasonable design, can reduce the overhaul cost of the overheating component, prolongs the service life and has excellent service performance.
Further, the surfacing area comprises a superheater tube and a surfacing layer sprayed on the surfacing layer.
Further, the thickness of the weld overlay is 0.5 to 2 mm.
Further, the weld overlay is made of stainless steel material.
Further, the weld overlay is made of a nickel-based material.
Further, the weld overlay is made of a cobalt-based material.
Further, the build-up welding region includes that first build-up welding is regional, second build-up welding is regional, third build-up welding is regional and the fourth build-up welding is regional, first build-up welding regional with the second build-up welding is regional to be located same height, the third build-up welding regional with the fourth build-up welding is regional to be located same height.
Further, the steam soot blower comprises a first steam soot blower and a second steam soot blower, the first steam soot blower and the first surfacing area are located at the same height, and the second steam soot blower and the third surfacing area are located at the same height.
Further, the superheat tubes of the superheat assembly are in a plurality of U-shapes.
In another aspect, an embodiment of the present invention further provides a method for manufacturing a superheat assembly, where the superheat assembly is applied to a superheat assembly, the superheat assembly includes a plurality of superheat assemblies arranged side by side, each superheat assembly includes a superheat tube and a plurality of steam soot blowers, a surface of the superheat tube is provided with a plurality of weld deposit areas, and the method includes: depositing the weld overlay in the weld overlay area using GTAW, GMAW, or laser deposition.
GMAW (gas metal arc welding) is an electric arc welding process that achieves metal bonding by heating the metal with an electric arc established between a continuously fed filler metal (consumable electrode) and the workpiece, the arc and molten bath being completely shielded by an externally supplied gas or gas mixture; GTAW (gas tungsten arc welding), somewhat similar to gas metal arc welding except that its electrodes are made of tungsten, have a very high melting point, and because it does not melt, there is no loss during the welding process, the shielding gas is used as a flux, if necessary, a filler rod can be used to provide metal to the weld, and almost all metals can be welded by argon tungsten arc welding, including most steels, aluminum alloys, magnesium alloys, copper, some brasses and bronzes, titanium, gold and silver, which process can provide high quality welds to thin plates; the laser surfacing is a technological process for forming a metal coating with specific performance on the surface of a workpiece by using a fusion welding method, and the technology can prepare an alloy layer with special performance on the surface of a cheap material or carry out local repair on parts, and particularly has wide application prospect in the aspect of shaft part repair.
According to the invention, the surface of the superheater tube is provided with a plurality of surfacing areas, so that the surfacing layer has higher hardness and better corrosion resistance, and the overhaul cost of the superheater assembly is reduced; it can be seen that the effect of the weld overlay area is: the hardness and the corrosion resistance of the superheater tube are improved, and the tube explosion accident is prevented. Therefore, the invention has simple and reasonable design, can reduce the overhaul cost of the overheating component, prolongs the service life and has excellent service performance.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic view of a superheating assembly according to an embodiment of the invention;
FIG. 2 is a cross-sectional view of the weld overlay region of FIG. 1;
FIG. 3 is a flow chart of a method of manufacturing a superheating device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
The embodiments of the present invention will be further explained with reference to the drawings.
As shown in fig. 1, fig. 1 is a schematic view of a superheating assembly according to an embodiment of the present invention.
Referring to fig. 1, in one aspect, an embodiment of the present invention provides a superheating device, which includes a plurality of superheating assemblies 100 arranged side by side, wherein each superheating assembly 100 includes a superheating pipe 101 and a plurality of steam soot blowers 102, a plurality of surfacing areas 103 are arranged on the surface of the superheating pipe 101, and the surfacing areas 103 are respectively arranged at positions close to the steam soot blowers 102.
One or more technical schemes provided in the embodiment of the invention have at least the following beneficial effects: compared with the overheating assembly 100 in the prior art, the steam soot blower 102 is arranged near the overheating pipe 101, so that ash in the overheating device can be cleaned, and the situation that the ash blocks a flue is prevented; in addition, the surface of the superheater tube 101 is provided with a plurality of surfacing areas 103, so that a surfacing layer 1031 has higher hardness and better corrosion resistance, and the overhaul cost of the superheater is reduced; it can be seen that the effect of the weld overlay region 103 is: the hardness and the corrosion resistance of the superheater tube 101 are improved, and the tube explosion accident is prevented. Therefore, the invention has simple and reasonable design, can reduce the maintenance cost of the overheating device, prolongs the service life and has excellent service performance.
As shown in fig. 2, fig. 2 is a cross-sectional view of the weld overlay region of fig. 1.
Referring to fig. 2, in the present embodiment, the overlay welding area 103 includes the overlay welding layer 1031 sprayed on the surface of the superheater tube 101, and the wear-resistant tile is installed instead of spraying the overlay welding layer 1031, so that the gap between the wear-resistant tile and the superheater tube 101 is eliminated, and the probability of the superheater tube 101 contacting with corrosive gas can be reduced.
In the present embodiment, the thickness of the build-up layer 1031 is 0.5 to 2 mm.
In the present embodiment, the overlay welding layer 1031 is made of stainless steel material, which is acid, alkali, and salt-resistant, and has great advantages in hardness, corrosion resistance, and heat resistance.
In the embodiment, the overlay welding layer 1031 is made of a nickel-based material, and the nickel-based alloy has good comprehensive performance, can resist various acid corrosion and stress corrosion, has high strength at a high temperature of 650-1000 ℃, and has certain oxidation corrosion resistance.
In this embodiment, the overlay 1031 is made of a cobalt-based alloy, which is a hard alloy that can resist various types of wear and corrosion and high temperature oxidation, and can be classified into a cobalt-based wear-resistant alloy, a cobalt-based high temperature-resistant alloy, and a cobalt-based wear-resistant and aqueous solution corrosion-resistant alloy. In general, cobalt-based alloys have both wear resistance and high temperature resistance or wear resistance and corrosion resistance, and some working conditions may require high temperature resistance, wear resistance and corrosion resistance.
In this embodiment, the weld overlay region 103 includes a first weld overlay region 103, a second weld overlay region 103, a third weld overlay region 103, and a fourth weld overlay region 103, where the first weld overlay region 103 and the second weld overlay region 103 are located at the same height, and the third weld overlay region 103 and the fourth weld overlay region 103 are located at the same height.
In the present embodiment, the steam sootblowers 102 include a first steam sootblower 102 and a second steam sootblower 102, the first steam sootblower 102 being located at the same elevation as the first weld overlay region 103, the second steam sootblower 102 being located at the same elevation as the third weld overlay region 103.
In this embodiment, the superheater tubes 101 of the superheater module 100 are formed in a plurality of U-shapes, which has a large contact area and is advantageous for sufficient heat dissipation.
As shown in fig. 3, fig. 3 is a flow chart of a method of manufacturing a superheating device according to an embodiment of the present invention.
Referring to fig. 3, in another aspect, an embodiment of the present invention further provides a method for manufacturing a overheating assembly 100, which is applied to the overheating assembly 100, wherein the overheating assembly 100 includes a plurality of overheating assemblies 100 arranged side by side, each overheating assembly 100 includes a overheating pipe 101 and a plurality of steam soot blowers 102, a surface of the overheating pipe 101 is provided with a plurality of bead weld areas 103, and the method includes: the weld overlay 1031 is deposited in the deposition area 103 by GTAW, GMAW, or laser deposition.
GMAW (gas metal arc welding) is an electric arc welding process that achieves metal bonding by heating the metal with an electric arc established between a continuously fed filler metal (consumable electrode) and the workpiece, the arc and molten bath being completely shielded by an externally supplied gas or gas mixture; GTAW (gas tungsten arc welding), somewhat similar to gas metal arc welding except that its electrodes are made of tungsten, have a very high melting point, and because it does not melt, there is no loss during the welding process, the shielding gas is used as a flux, if necessary, a filler rod can be used to provide metal to the weld, and almost all metals can be welded by argon tungsten arc welding, including most steels, aluminum alloys, magnesium alloys, copper, some brasses and bronzes, titanium, gold and silver, which process can provide high quality welds to thin plates; the laser surfacing welding is a technological process for forming a metal coating with specific performance on the surface of a workpiece by using a fusion welding method, and the technology can prepare an alloy layer with special performance on the surface of a cheap material or carry out local repair on parts, and is particularly widely applied to the repair of shaft parts.
According to the invention, a layer of corrosion-resistant and wear-resistant material is spray-welded on the surface of the superheater tube 101, so that the surfacing layer 1031 has higher hardness and better corrosion resistance, and the overhaul cost of the superheater assembly 100 is reduced; wherein the effect of the weld overlay region 103 is: the hardness and the corrosion resistance of the superheater tube 101 are improved, and the tube explosion accident is prevented. Therefore, the invention has simple and reasonable design, can reduce the overhaul cost of the overheating component 100, prolongs the service life and has excellent service performance.
While the preferred embodiments and basic principles of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments, but is intended to cover various modifications, equivalents and alternatives falling within the scope of the invention as claimed.
Claims (10)
1. The utility model provides a superheating device, its characterized in that includes a plurality of overheated subassembly side by side together, overheated subassembly all includes superheater tube and a plurality of steam soot blower, the superheater tube surface is provided with a plurality of build-up welding region, the build-up welding region sets up respectively in being close to the position of steam soot blower.
2. A superheating device according to claim 1, characterised in that: the surfacing area comprises a surfacing layer sprayed on the surface of the superheater tube.
3. A superheating device according to claim 2, characterised in that: the thickness of the overlaying layer is 0.5-2 mm.
4. A superheating device according to claim 2, characterised in that: the resurfacing layer is made of stainless steel material.
5. A superheating device according to claim 2, characterised in that: the resurfacing layer is made of a nickel-based material.
6. A superheating device according to claim 2, characterised in that: the weld overlay is made of a cobalt-based material.
7. A superheating device according to claim 1, characterised in that: the build-up welding region includes that first build-up welding is regional, second build-up welding is regional, third build-up welding is regional and the fourth build-up welding is regional, first build-up welding regional with the second build-up welding is regional to be located same height, the third build-up welding regional with the fourth build-up welding is regional to be located same height.
8. A superheating device according to claim 7, characterised in that: the steam soot blower comprises a first steam soot blower and a second steam soot blower, the first steam soot blower and the first surfacing area are located at the same height, and the second steam soot blower and the third surfacing area are located at the same height.
9. A superheater, characterized by: comprising a superheating device according to any one of claims 1 to 8.
10. The method for manufacturing the overheating device is applied to the overheating device, the overheating device comprises a plurality of overheating assemblies which are arranged side by side, each overheating assembly comprises an overheating pipe and a plurality of steam soot blowers, a plurality of surfacing areas are arranged on the surface of each overheating pipe, and each surfacing area is arranged at a position close to each steam soot blower, and the method comprises the following steps: depositing the weld overlay in the weld overlay area using GTAW, GMAW, or laser deposition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011179906.6A CN112361325A (en) | 2020-10-29 | 2020-10-29 | Overheating device and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011179906.6A CN112361325A (en) | 2020-10-29 | 2020-10-29 | Overheating device and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112361325A true CN112361325A (en) | 2021-02-12 |
Family
ID=74513038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011179906.6A Pending CN112361325A (en) | 2020-10-29 | 2020-10-29 | Overheating device and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112361325A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000304238A (en) * | 1999-04-16 | 2000-11-02 | Ishikawajima Harima Heavy Ind Co Ltd | Soot blower |
| CN101631998A (en) * | 2007-01-12 | 2010-01-20 | 英诺斯平股份公司 | Heat-exchange tube and the method that is used to make heat-exchange tube |
| CN202203961U (en) * | 2011-07-15 | 2012-04-25 | 王光明 | Sound insulation and heat insulation device of sound wave soot blower |
| CN103170444A (en) * | 2011-12-26 | 2013-06-26 | 西安长庆图博可特石油管道涂层有限公司 | Airless spraying corrosion resistance technology for inner wall and outer wall of oil pipe |
| CN104180706A (en) * | 2014-08-22 | 2014-12-03 | 安徽电力股份有限公司淮南田家庵发电厂 | Low-temperature economizer tube surface protective layer and forming method thereof |
| CN104878344A (en) * | 2015-05-22 | 2015-09-02 | 山西华辉恒源防腐工程有限公司 | Novel spraying technology for corrosion prevention and abrasion prevention of boiler |
| CN110360569A (en) * | 2018-12-30 | 2019-10-22 | 上海康恒环境股份有限公司 | A kind of high temperature and pressure garbage burning boiler |
| CN210291823U (en) * | 2019-06-20 | 2020-04-10 | 华能国际电力股份有限公司海门电厂 | Blowing heating surface blowing loss prevention structure of boiler |
| CN210319073U (en) * | 2019-05-23 | 2020-04-14 | 嘉德节能科技(广州)有限公司 | Anti-oxidation structure for hearth radiation furnace tube |
-
2020
- 2020-10-29 CN CN202011179906.6A patent/CN112361325A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000304238A (en) * | 1999-04-16 | 2000-11-02 | Ishikawajima Harima Heavy Ind Co Ltd | Soot blower |
| CN101631998A (en) * | 2007-01-12 | 2010-01-20 | 英诺斯平股份公司 | Heat-exchange tube and the method that is used to make heat-exchange tube |
| CN202203961U (en) * | 2011-07-15 | 2012-04-25 | 王光明 | Sound insulation and heat insulation device of sound wave soot blower |
| CN103170444A (en) * | 2011-12-26 | 2013-06-26 | 西安长庆图博可特石油管道涂层有限公司 | Airless spraying corrosion resistance technology for inner wall and outer wall of oil pipe |
| CN104180706A (en) * | 2014-08-22 | 2014-12-03 | 安徽电力股份有限公司淮南田家庵发电厂 | Low-temperature economizer tube surface protective layer and forming method thereof |
| CN104878344A (en) * | 2015-05-22 | 2015-09-02 | 山西华辉恒源防腐工程有限公司 | Novel spraying technology for corrosion prevention and abrasion prevention of boiler |
| CN110360569A (en) * | 2018-12-30 | 2019-10-22 | 上海康恒环境股份有限公司 | A kind of high temperature and pressure garbage burning boiler |
| CN210319073U (en) * | 2019-05-23 | 2020-04-14 | 嘉德节能科技(广州)有限公司 | Anti-oxidation structure for hearth radiation furnace tube |
| CN210291823U (en) * | 2019-06-20 | 2020-04-10 | 华能国际电力股份有限公司海门电厂 | Blowing heating surface blowing loss prevention structure of boiler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2824266C (en) | Weld overlay structure and a method of providing a weld overlay structure | |
| CN101722351A (en) | Method for controlling quality of linerless single-sided welding double-sided molding backing weld seam | |
| CN106695079A (en) | Welding method of double-metal composite pipe | |
| CN112303344A (en) | Metal composite pipe and manufacturing method thereof | |
| CN109023208A (en) | Process for the ultra-thin nickel-base alloy erosion resistant coating of waste incinerator heating surface | |
| CN105108297A (en) | Overall composite flange and manufacturing method thereof | |
| CN112361325A (en) | Overheating device and manufacturing method thereof | |
| CN109604927A (en) | The build-up welding repair method of continuous cast mold short side copper sheet side | |
| ZA200502207B (en) | Method for the formation of a good contact surface on a cathode support bar and support bar | |
| MXPA03007246A (en) | Coated stainless-steel/copper weld for electroplating cathode. | |
| CN110405372A (en) | A kind of two phase stainless steel heat exchanger plates complex welding method based on residual stress regulation | |
| CN110064865B (en) | Gas shield welding wire for welding circulating fluidized bed boiler protection plate and water-cooled wall fin | |
| CN112439981B (en) | Butt joint method of corrosion-resistant alloy prefabricated inner joint coating steel pipe | |
| CN112355512A (en) | Welding structure and welding method | |
| CN105855663A (en) | New method for surfacing coating composite welding | |
| JP3651819B2 (en) | Method for modifying copper or copper alloy surface | |
| CN204893199U (en) | Whole compound flange | |
| CN103147035B (en) | Remelting processing method for suction and exhaust valve casing of internal combustion engine | |
| CN217504489U (en) | Brazing joint of parallel flow type collecting pipe | |
| CN217356848U (en) | Abrasion-proof boiler water wall pipe | |
| US20230084075A1 (en) | Use of a nickel-chromium-iron alloy | |
| CN1223191A (en) | Method for protecting metal work-pieces by welding | |
| JP2002103035A (en) | Seam welding method of uo steel pipe | |
| EP1143198A1 (en) | Device and method for cooling fume intakes | |
| JP2004518822A (en) | Structural components for boiler area of power plant or waste incineration plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210212 |