CN219178307U - Water cooling wall structure at inlet of radiation chamber of waste heat boiler - Google Patents
Water cooling wall structure at inlet of radiation chamber of waste heat boiler Download PDFInfo
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- CN219178307U CN219178307U CN202223425605.4U CN202223425605U CN219178307U CN 219178307 U CN219178307 U CN 219178307U CN 202223425605 U CN202223425605 U CN 202223425605U CN 219178307 U CN219178307 U CN 219178307U
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Abstract
The utility model discloses a water-cooled wall structure at the inlet of a radiation chamber of a waste heat boiler, which comprises a membrane-type water-cooled wall body with a planar fire facing surface, wherein the membrane-type water-cooled wall body is formed by welding omega-shaped pipes with the cross section of omega, a plurality of independent parallel water circulation loops are formed by the membrane-type water-cooled wall body through a plurality of connecting pipes, the inlet of each water circulation loop is communicated with a distribution header through an independent inlet pipe, a first cut-off valve is arranged on each inlet pipe, the outlet of each water circulation loop is communicated with a collection header through an independent outlet pipe, and a second cut-off valve is arranged on each outlet pipe. The utility model has the advantage of improving the use safety of the waste heat boiler.
Description
Technical Field
The utility model relates to the technical field of waste heat boilers, in particular to a water-cooled wall structure at an inlet part of a radiation chamber of a waste heat boiler.
Background
The waste heat boiler is an important device for nonferrous smelting. The hearth of the waste heat boiler consists of a membrane water-cooled wall, and particularly comprises a radiation area with a larger front part and a convection area with a smaller rear part. The high-temperature flue gas generated in the nonferrous smelting process has complex components, high SO2 concentration, strong corrosiveness and high smoke content, and the high-temperature flue gas discharged from the outlet of the smelting furnace firstly enters the radiation area of the waste heat boiler and then enters the convection area, and the high-temperature flue gas is cooled through heat exchange of the membrane water cooling wall. The inlet water-cooled wall structure of the radiation chamber of the existing waste heat boiler is as follows: the water-cooled wall body is formed by splicing and welding light pipes and steel plates, the water-cooled wall body forms a waterway through a bent pipe, and an inlet of the waterway is communicated with the water inlet header, and an outlet of the waterway is communicated with the water outlet header. The water-cooled wall structure at the inlet of the radiation chamber of the waste heat boiler has the following defects: the heating surface pipe at the inlet of the radiation chamber of the waste heat boiler works in a complex smoke environment for a long time, is easily eroded and corroded by high-temperature smoke, causes the wall of the water wall pipe to be thinned, and can burst when serious, so that the use safety is low.
Disclosure of Invention
The utility model aims to provide a water-cooled wall structure at the inlet part of a radiation chamber of a waste heat boiler, which is beneficial to improving the use safety of the waste heat boiler.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a waste heat boiler radiation chamber entrance water-cooling wall structure, includes the membrane type water-cooling wall body that the face of facing the fire that is the plane that is splice-welded by omega pipe that the cross section is "omega", the membrane type water-cooling wall body forms the independent parallel hydrologic cycle return circuit of a plurality of ways through a plurality of connecting pipes, and the import of every hydrologic cycle return circuit communicates the distribution collection box through independent inlet tube, is provided with first shut-off valve on every inlet tube, and the export of every hydrologic cycle return circuit is provided with the second shut-off valve on every outlet tube through independent outlet tube intercommunication collection box.
Further, the aforementioned exhaust-heat boiler radiation chamber inlet portion water-cooled wall structure, wherein: a nickel-based surfacing layer is surfacing welded on the fire facing surface of the membrane water wall body.
Further, the aforementioned exhaust-heat boiler radiation chamber inlet portion water-cooled wall structure, wherein: the thickness of the nickel-based surfacing layer is 2-3 mm.
Further, the aforementioned exhaust-heat boiler radiation chamber inlet portion water-cooled wall structure, wherein: a safety valve is arranged on each eduction tube.
Through implementation of the technical scheme, the utility model has the beneficial effects that: (1) The water wall pipe at the inlet part of the radiation chamber is formed by welding omega pipes, so that the fire facing surface of the water wall is a plane, the inner wall of the water wall is smoother than that of a light pipe water wall under the same specification, the formation of smoke scouring and dust accumulation and slag formation can be reduced, the wall thickness of the water wall is larger than that of the light pipe water wall under the same specification, the abrasion allowance of the water wall is increased, the pipe explosion caused by thinning the pipe wall of the water wall is reduced, and the use safety is improved; (2) The nickel-based surfacing layer is surfacing-welded on the fire facing surface of the membrane type water-cooled wall body, so that the thickness of the water-cooled wall is further increased, the water-cooled wall has better high-temperature resistance, corrosion resistance and scouring resistance, the tube explosion phenomenon of the water-cooled wall caused by the thinning of the tube wall is further effectively avoided, and the working time of the water-cooled wall in a severe smoke environment is prolonged; (3) The independent water circulation loop is adopted, each water circulation loop is provided with an independent cut-off valve and a safety valve, when a fire-facing surface in a certain water circulation loop is detonated, the water supply of the water circulation loop can be cut off timely, the normal work of other water circulation loops is not influenced, and meanwhile, the maintenance of a fault loop is carried out timely, so that the occurrence of secondary accidents is avoided.
Drawings
Fig. 1 is a schematic structural view of a water-cooled wall structure at an inlet of a radiation chamber of a waste heat boiler.
FIG. 2 is a schematic illustration of the positional relationship between a membrane wall body and a nickel-based weld overlay.
FIG. 3 is a schematic view of the structure of a membrane wall body.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
As shown in fig. 1, 2 and 3, the water-cooled wall structure at the inlet of the radiation chamber of the waste heat boiler comprises a membrane water-cooled wall body 3 with a planar fire-facing surface 2 formed by welding omega-shaped pipes 1 with cross sections of omega, when the planar fire-facing surface is used as a fire-facing surface, the water-cooled wall can be smoother than a traditional light pipe water-cooled wall, the formation of flue gas scouring and slag formation can be reduced, one end of the planar surface of the omega-shaped pipe is thicker than the traditional light pipe water-cooled wall, and the margin of abrasion of the water-cooled wall is more; the membrane water wall body 3 forms a plurality of independent parallel water circulation loops 4 through a plurality of connecting pipes, the inlet of each water circulation loop 4 is communicated with the distribution header 6 through independent inlet pipes 5, a first cut-off valve 7 is arranged on each inlet pipe 5, the outlet of each water circulation loop 4 is communicated with the collection header 10 through independent outlet pipes 9, a second cut-off valve 11 and a safety valve 12 are arranged on each outlet pipe 9, and the safety valve 12 has the functions that: the two shut-off valves can be prevented from being closed by misoperation to form a dead loop under the condition that water exists in the loop, and the occurrence of pipe explosion accidents caused by continuous thermal expansion of water in the pipe is avoided; in the embodiment, a nickel-based surfacing layer 13 is surfacing-welded on the fire facing surface 2 of the membrane type water wall body 3, the thickness of the nickel-based surfacing layer is 2-3 mm, the thickness of the water wall is further increased through the nickel-based surfacing layer 13, compact metallurgical bonding can be formed between the nickel-based surfacing layer and the water wall matrix, the overall toughness of the water wall is improved, the abrasion allowance of the water wall is also increased, in addition, the nickel-based 625 alloy has good high temperature resistance, corrosion resistance, erosion resistance and wear resistance, so that the water wall has better high temperature resistance, corrosion resistance and erosion resistance, the capability of the water wall against severe smoke environment can be enhanced, the tube explosion phenomenon caused by tube wall thinning of the water wall is further effectively avoided, and the working time of the water wall in the severe smoke environment is prolonged;
during operation, circulating water enters the distribution header 6 from an external pressure pipe, is distributed to each inlet pipe 5 through the distribution header 6, flows into each independent water circulation loop 4 of the water-cooled wall from the inlet pipe 5, absorbs heat in the water circulation loop 4, flows out, is gathered to the collection header 10 through the eduction pipe 9, and is returned to an external main circulation pipeline through the collection header 10; when the heating surface pipe of a certain water circulation loop 4 of the water cooling wall is detonated, the water supply of the loop can be cut off in time by controlling the first cut-off valve 7 and the second cut-off valve 11 so as to perform online fault emergency repair, and the normal operation of other water circulation loops 4 is not influenced.
The utility model has the advantages that: (1) The water wall pipe at the inlet part of the radiation chamber is formed by welding omega pipes, so that the fire facing surface of the water wall is a plane, the inner wall of the water wall is smoother than that of a light pipe water wall under the same specification, the formation of smoke scouring and dust accumulation and slag formation can be reduced, the wall thickness of the water wall is larger than that of the light pipe water wall under the same specification, the abrasion allowance of the water wall is increased, the pipe explosion caused by thinning the pipe wall of the water wall is reduced, and the use safety is improved; (2) The nickel-based surfacing layer is surfacing-welded on the fire facing surface of the membrane type water-cooled wall body, so that the thickness of the water-cooled wall is further increased, the water-cooled wall has better high-temperature resistance, corrosion resistance and scouring resistance, the tube explosion phenomenon of the water-cooled wall caused by the thinning of the tube wall is further effectively avoided, and the working time of the water-cooled wall in a severe smoke environment is prolonged; (3) The independent water circulation loop is adopted, each water circulation loop is provided with an independent cut-off valve and a safety valve, when a fire-facing surface in a certain water circulation loop is detonated, the water supply of the water circulation loop can be cut off timely, the normal work of other water circulation loops is not influenced, and meanwhile, the maintenance of a fault loop is carried out timely, so that the occurrence of secondary accidents is avoided.
The above description is only of the preferred embodiment of the present utility model, and is not intended to limit the present utility model in any other way, but any modifications or equivalent variations according to the technical spirit of the present utility model are still included in the scope of the present utility model.
Claims (4)
1. Waste heat boiler radiation chamber entrance water-cooled wall structure, its characterized in that: the membrane type water-cooled wall comprises a membrane type water-cooled wall body with a planar fire facing surface, wherein the fire facing surface is formed by welding omega-shaped pipes with the cross section, the membrane type water-cooled wall body forms a plurality of paths of independent parallel water circulation loops through a plurality of connecting pipes, an inlet of each path of water circulation loop is communicated with a distribution box through an independent inlet pipe, a first cut-off valve is arranged on each inlet pipe, an outlet of each path of water circulation loop is communicated with a collection box through an independent outlet pipe, and a second cut-off valve is arranged on each outlet pipe.
2. The exhaust-heat boiler radiation chamber inlet portion water wall structure according to claim 1, wherein: a nickel-based surfacing layer is surfacing welded on the fire facing surface of the membrane water wall body.
3. The exhaust-heat boiler radiation chamber inlet portion water wall structure according to claim 2, wherein: the thickness of the nickel-based surfacing layer is 2-3 mm.
4. The exhaust-heat boiler radiant chamber inlet portion water wall structure according to claim 1 or 2 or 3, characterized in that: a safety valve is arranged on each eduction tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223425605.4U CN219178307U (en) | 2022-12-21 | 2022-12-21 | Water cooling wall structure at inlet of radiation chamber of waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223425605.4U CN219178307U (en) | 2022-12-21 | 2022-12-21 | Water cooling wall structure at inlet of radiation chamber of waste heat boiler |
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| Publication Number | Publication Date |
|---|---|
| CN219178307U true CN219178307U (en) | 2023-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223425605.4U Active CN219178307U (en) | 2022-12-21 | 2022-12-21 | Water cooling wall structure at inlet of radiation chamber of waste heat boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219178307U (en) |
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2022
- 2022-12-21 CN CN202223425605.4U patent/CN219178307U/en active Active
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