CN210967535U - Surfacing, melting and coating anti-corrosion device for water-cooled wall of high-temperature area of hearth - Google Patents
Surfacing, melting and coating anti-corrosion device for water-cooled wall of high-temperature area of hearth Download PDFInfo
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- CN210967535U CN210967535U CN201921494427.6U CN201921494427U CN210967535U CN 210967535 U CN210967535 U CN 210967535U CN 201921494427 U CN201921494427 U CN 201921494427U CN 210967535 U CN210967535 U CN 210967535U
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Abstract
The utility model provides a carry out build-up welding to furnace high temperature region water-cooling wall and melt and apply anti corrosion device, including water-cooling wall, water tank, water pump and external pipeline, wherein, water-cooling wall is made by the crisscross interval welding of sheetmetal and metal pipeline, and water-cooling wall's metal pipeline is connected with water tank and water pump through external pipeline and link up, and the processing area carries out water-filling cooling when carrying out the build-up welding and melt and apply anticorrosive treatment, and the water after the heat absorption collects in the water tank, in taking out the metal pipeline of returning water-cooling wall through the pipeline by the water pump after the cooling, the heat absorption of repetitive cycle. The utility model discloses solved effectively not changing to expensive material and realized the anticorrosive problem in water-cooling wall high temperature region to and solved the build-up welding and melt and apply the problem that causes the water-cooling wall to suffer high temperature damage easily when anticorrosive, greatly reduced the anticorrosive cost in water-cooling wall high temperature region, and melt and apply material and build-up welding through selecting suitable build-up welding and melt and apply layer thickness, makeed anticorrosive effect reach the optimum degree.
Description
Technical Field
The utility model relates to a carry out build-up welding to furnace high temperature region water-cooling wall and melt and apply anti-corrosion device.
Background
The water-cooled wall of the high-temperature area of the hearth of the biomass grate-firing boiler is positioned in the highest-temperature area in the boiler, and the water-cooled wall of the area is close to the fuel combustion area, so that the content of alkali metal in the contacted flue gas is very high. Therefore, the water wall of the area is very seriously corroded by high-temperature alkali metal, and the water wall pipe is very easy to break at the area. When the water wall bears ultrahigh pressure, the problem of high-temperature alkali metal corrosion is more serious.
In the prior art, in order to solve the problem, a boiler plant mainly adopts a measure of selecting a better water-cooled wall material, for example, the water-cooled wall material is changed into alloy steel 15CrMoG from conventional carbon steel 20G. However, the water wall in the hearth is of a large integral structure, and the condition of dissimilar steel welding cannot occur, so that the water wall in a high-temperature area cannot be replaced by good materials, and other positions still adopt conventional materials. The water wall and the water wall header in the whole hearth need to be replaced by alloy steel 15CrMoG, which causes the whole cost of the boiler to rise by about 5 percent (about 150 ten thousand). Although the method is good, the economy is poor and the feasibility is poor.
Therefore, how to provide a device for performing surfacing, melting and corrosion prevention on a water-cooled wall of a high-temperature region of a hearth to solve the above difficulties is a problem to be solved urgently.
Disclosure of Invention
The utility model provides a surfacing and fusion anti-corrosion device for the water-cooled wall in the high temperature area of a hearth aiming at the defects of the prior art, which comprises the water-cooled wall, a water tank, a water pump and an external pipeline, wherein,
the water-cooled wall is formed by welding metal sheets and metal pipelines at staggered intervals;
the metal pipeline of the water-cooled wall is connected and communicated with the water tank and the water pump through the external pipeline;
carry out the surfacing and melt and apply anticorrosive treatment and carry out water cooling to the treatment area simultaneously, water after the heat absorption collects in the water tank, after the cooling by the water pump take out the warp the outside pipeline is beaten back in the metal pipeline of water-cooling wall, the repeated cycle absorbs heat.
Preferably, the area range of the water cooling is enlarged to prevent the peripheral area of the processing area from being damaged at high temperature due to the good heat conduction characteristic of metal.
Preferably, the surfacing fused material is nickel-based alloy.
Preferably, the thickness of the surfacing welding cladding layer is 1.5-2 mm.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. through the utility model provides a to the regional water-cooled wall of furnace high temperature build-up welding melt and apply anti-corrosion device, allow the water-cooled wall material still to choose conventional carbon steel 20G for use, and need not change the water-cooled wall material, only melt to build-up welding to the water-cooled wall that is in the high temperature region and apply the processing, just can reach the effect of anticorrosion.
2. Through the utility model provides a to the regional water-cooled wall of furnace high temperature build-up welding melt and apply anti-corrosion device, the build-up welding melts the material that applies, optional nickel base alloy etc. its corrosion resisting property is better than even changing into the 15CrMoG effects of alloy steel.
3. Through the utility model provides a to the regional water-cooled wall of furnace high temperature build-up welding melt and apply anti-corrosion device, the build-up welding melts the thickness that applies, should be decided according to alkali metal's in the fuel content, preferably is 1.5~2 mm.
Drawings
FIG. 1 is the utility model provides a carry out build-up welding to furnace high temperature region water-cooling wall and melt and apply corrosion prevention device's schematic diagram.
1-a water-cooled wall, 11-a metal sheet, 12-a metal pipeline, 2-a water tank, 3-a water pump, 4-an external pipeline, 5-a first treatment area and 6-a second treatment area.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in figure 1, the utility model provides a carry out build-up welding to furnace high temperature region water-cooling wall and melt and apply anti corrosion device, including water-cooling wall 1, water tank 2, water pump 3 and external pipeline 4, wherein, water-cooling wall 1 is made by the crisscross interval welding of sheetmetal 11 and metal pipeline 12, the head and the tail both ends of metal pipeline 12 of water-cooling wall 1 are connected with water tank 2 and water pump 3 through external pipeline 4, carry out the water cooling to the processing region when carrying out the build-up welding melt and apply anticorrosive treatment, the water after the heat absorption collects in water tank 2, is taken out by water pump 3 after the cooling and is beaten back in the metal pipeline 12 of water-cooling wall 1 through external pipeline 4, the repeated cycle absorbs the heat.
Because of the requirement of a surfacing, melting and coating anti-corrosion treatment technology, only a local area of the water-cooled wall 1 can be treated by one-time treatment. However, since the temperature during the surfacing fusion anticorrosion treatment is very high, the metal sheets 11 and the metal pipes 12 of the water wall 1 are easily distorted and deformed by heat, and the water wall 1 is damaged destructively. Therefore, when surfacing and fusion coating anti-corrosion treatment are carried out, water needs to be introduced into a treatment area for cooling, and flowing water takes away heat in time so as to avoid damaging a water-cooled wall. Specifically, the flow direction of the water is as indicated by the arrows in fig. 1.
Preferably, the area range of the water cooling is enlarged to prevent the peripheral area of the processing area from being damaged at high temperature due to the good heat conduction characteristic of metal. As shown in fig. 1, the processing region is expanded from a first processing region 5 to a second processing region 6.
Preferably, the surfacing fused material is nickel-based alloy.
Preferably, the thickness of the surfacing welding cladding layer is 1.5-2 mm.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. through the utility model provides a carry out build-up welding to furnace high temperature region water-cooling wall and melt and apply anti-corrosion device for need not a large amount of changes water-cooling wall material, can realize anticorrosive.
2. Adopt the utility model provides a carry out build-up welding to furnace high temperature region water-cooling wall and melt and apply anti-corrosion device, the water-cooling wall suffers the problem of high temperature destructive damage when solving the build-up welding effectively through leading to water cooling and cladding.
3. The utility model provides a carry out build-up welding to furnace high temperature region water-cooling wall and melt and apply anti-corrosion device, through suitably enlarging the regional scope that leads to water the cooling, prevent that the peripheral region of treatment area from causing the high temperature to damage because the good heat conduction characteristic of metal.
4. The utility model provides a carry out build-up welding to furnace high temperature region water-cooling wall and melt and apply anti-corrosion device, the material that the build-up welding melts and applies adopts nickel base alloy, and its corrosion resisting property is better than even changing into the 15CrMoG effects of alloy steel.
5. The utility model provides a carry out build-up welding to furnace high temperature region water-cooling wall and melt and apply anti-corrosion device, the thickness that the build-up welding melts the coating is good at 1.5~2 mm.
To sum up, the utility model provides a carry out build-up welding to furnace high temperature region water-cooling wall and melt and apply anti-corrosion device has solved effectively and has not changed to expensive material and realize the anticorrosive problem in water-cooling wall high temperature region to and solved the build-up welding and melt and apply the problem that causes the water-cooling wall to suffer high temperature damage easily when anticorrosive, greatly reduced the anticorrosive cost in water-cooling wall high temperature region, and melt and apply material and build-up welding through selecting suitable build-up welding and melt and apply layer thickness, make anticorrosive effect reach the optimum degree.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It will be apparent to those skilled in the art that various changes and modifications may be made to the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. A surfacing, melting and coating anti-corrosion device for a water-cooled wall in a high-temperature area of a hearth is characterized by comprising the water-cooled wall, a water tank, a water pump and an external pipeline, wherein,
the water-cooled wall is formed by welding metal sheets and metal pipelines at staggered intervals;
the metal pipeline of the water-cooled wall is connected and communicated with the water tank and the water pump through the external pipeline;
carry out the surfacing and melt and apply anticorrosive treatment and carry out water cooling to the treatment area simultaneously, water after the heat absorption collects in the water tank, after the cooling by the water pump take out the warp the outside pipeline is beaten back in the metal pipeline of water-cooling wall, the repeated cycle absorbs heat.
2. The device for performing overlaying welding fusion corrosion prevention on the water-cooled wall of the high-temperature region of the hearth according to claim 1, wherein the region range for water cooling is expanded to prevent the peripheral region of the treatment region from being damaged at high temperature due to good heat conduction characteristics of metal.
3. The device for performing overlaying welding fusion corrosion prevention on the water-cooled wall of the high-temperature region of the hearth according to claim 1, wherein the material for overlaying welding fusion is nickel-based alloy.
4. The device for performing overlaying welding fusion coating corrosion prevention on the water cooled wall of the high-temperature area of the hearth according to claim 1, wherein the thickness of the overlaying welding fusion coating is 1.5-2 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921494427.6U CN210967535U (en) | 2019-09-10 | 2019-09-10 | Surfacing, melting and coating anti-corrosion device for water-cooled wall of high-temperature area of hearth |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921494427.6U CN210967535U (en) | 2019-09-10 | 2019-09-10 | Surfacing, melting and coating anti-corrosion device for water-cooled wall of high-temperature area of hearth |
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| CN210967535U true CN210967535U (en) | 2020-07-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113649677A (en) * | 2021-08-17 | 2021-11-16 | 江苏科环新材料有限公司 | Method for reinforcing explosion-proof pipe in subarea by induction fusion welding and surfacing welding on fire facing side of boiler pipeline |
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2019
- 2019-09-10 CN CN201921494427.6U patent/CN210967535U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113649677A (en) * | 2021-08-17 | 2021-11-16 | 江苏科环新材料有限公司 | Method for reinforcing explosion-proof pipe in subarea by induction fusion welding and surfacing welding on fire facing side of boiler pipeline |
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