CN112856460B - A smelt chute for alkali recovery boiler - Google Patents
A smelt chute for alkali recovery boiler Download PDFInfo
- Publication number
- CN112856460B CN112856460B CN202110338556.1A CN202110338556A CN112856460B CN 112856460 B CN112856460 B CN 112856460B CN 202110338556 A CN202110338556 A CN 202110338556A CN 112856460 B CN112856460 B CN 112856460B
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- jacket
- lower jacket
- chute
- space
- connecting pipe
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- 239000003513 alkali Substances 0.000 title claims abstract description 16
- 238000011084 recovery Methods 0.000 title claims abstract description 15
- 241001062472 Stokellia anisodon Species 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 83
- 239000000498 cooling water Substances 0.000 claims abstract description 23
- 238000005192 partition Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000008646 thermal stress Effects 0.000 abstract description 3
- 239000012768 molten material Substances 0.000 description 16
- 230000004927 fusion Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 210000005056 cell body Anatomy 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
- F23J1/08—Liquid slag removal
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
本发明公开了一种碱回收锅炉熔物溜槽，其槽体为中空的夹套结构，包括上部夹套和下部夹套，上部夹套内设有隔板将上部夹套分隔为进水空间和出水空间，进水空间外接进水管，出水空间外接出水管，进水空间与下部夹套连通，下部夹套与出水空间连通。下部夹套内设有导流板，导流板沿下部夹套长度方向设置使冷却水进入下部夹套后在下部夹套内往返流动再流出下部夹套。本发明溜槽工作时冷却水在溜槽内外夹套间沿箭头所述方向流动，冷却水充分折流，熔物溜槽内套各处温度分布均匀，热应力很小，能有效延长熔物溜槽使用寿命。冷却水进出水管都位于溜槽上部，管线布置简单，拆卸熔物溜槽简单方便。
The present invention discloses a smelt chute of an alkali recovery boiler, the chute body of which is a hollow jacket structure, including an upper jacket and a lower jacket. A partition is provided in the upper jacket to separate the upper jacket into a water inlet space and a water outlet space. The water inlet space is externally connected to an inlet pipe, and the water outlet space is externally connected to an outlet pipe. The water inlet space is communicated with the lower jacket, and the lower jacket is communicated with the water outlet space. A guide plate is provided in the lower jacket, and the guide plate is arranged along the length direction of the lower jacket so that the cooling water flows back and forth in the lower jacket after entering the lower jacket and then flows out of the lower jacket. When the chute of the present invention is working, the cooling water flows between the inner and outer jackets of the chute in the direction indicated by the arrow, the cooling water is fully deflected, the temperature distribution of each part of the inner jacket of the smelt chute is uniform, the thermal stress is very small, and the service life of the smelt chute can be effectively extended. The cooling water inlet and outlet pipes are both located at the upper part of the chute, the pipeline layout is simple, and the disassembly of the smelt chute is simple and convenient.
Description
Technical Field
The invention belongs to the technical field of alkali recovery boilers, and particularly relates to a fusion chute of an alkali recovery boiler.
Background
When the alkali recovery boiler operates, molten salt in a molten state at the bottom of the boiler flows out uninterruptedly through a molten material chute at the temperature of about 900 ℃ and enters a dissolving tank positioned at the lower part of the chute for dissolution. The desalted water at about 40 ℃ flows through the jacket of the molten material chute to cool the molten material chute.
The smelt chute is a key device of an alkali recovery boiler of a pulp mill, the alkali recovery boiler needs to be replaced once damaged and leaked, the alkali furnace needs to be stopped when the smelt chute is replaced, and the loss caused by stopping is far greater than the value of the smelt chute device. The following problems exist with the smelt spouts commonly found in the marketplace:
1. the water inlet pipe is positioned at the lower part of the melting chute, the water outlet pipe is positioned at the upper part of the melting chute, the pipeline arrangement is complex, and the melting chute is difficult to disassemble.
2. Most of the leakage will occur after about 3 to 6 months of use.
Disclosure of Invention
The invention aims to overcome the defects and the shortcomings of the prior art, and provides the alkali recovery boiler smelt chute which has the advantages of simple pipeline arrangement and convenient disassembly and can effectively prolong the service life.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides an alkali recovery boiler fusion chute, its cell body is hollow jacket structure, includes upper portion jacket and lower part jacket, be equipped with the baffle in the upper portion jacket with upper portion jacket separates into water inlet space and play water space, water inlet space external inlet tube, play water space external outlet pipe, water inlet space and lower part jacket intercommunication, lower part jacket and play water space intercommunication.
Further, a deflector is arranged in the lower jacket, and the deflector is arranged along the length direction of the lower jacket 2, so that cooling water flows back and forth in the lower jacket after entering the lower jacket and then flows out of the lower jacket.
Further, the lower jacket is of a U-shaped long groove structure which is obliquely arranged, and comprises a lower outer jacket and a lower inner jacket, the tail ends of the lower outer jacket and the lower inner jacket and two upper end surfaces of the lower outer jacket and the lower inner jacket are sealed by an upper jacket connecting pipe and a lower jacket connecting pipe, and the upper jacket connecting pipe and the lower jacket connecting pipe consist of two straight pipe sections and a U-shaped pipe section;
the upper jacket is of a circular arc structure and is arranged right above the front ends of the upper jacket connecting pipes and the lower jacket connecting pipes, a cylindrical melt inlet is formed by surrounding the upper jacket and the front ends of the lower jacket together, the upper jacket comprises an upper outer jacket and an upper inner jacket, the tail ends of the upper outer jacket and the upper inner jacket are sealed through sealing plates, and the head ends of the upper jacket and the lower jacket are sealed through annular upper jacket connecting pipe rings and annular lower jacket connecting pipe rings;
the upper jacket is internally provided with two clapboards along the length direction, the two clapboards, the upper outer jacket, the upper inner jacket, the upper jacket and the lower jacket are connected with the inner sides of the pipe rings to form the water inlet space by enclosing plates, the positions of the enclosing plates corresponding to the water inlet space are provided with water inlets which are communicated with the water inlet pipe,
The baffle, the upper outer jacket, the upper inner jacket, the upper end surfaces of the upper jacket connecting pipes and the lower jacket connecting pipes and the sealing plates enclose a water outlet space, two water outlet spaces are formed, water outlets are formed in the positions, corresponding to the water outlet spaces, on the sealing plates, and the water outlets are communicated with the water outlet pipes;
a first through hole is formed in the upper jacket connecting pipe ring and the lower jacket connecting pipe ring at a position corresponding to the water inlet space, and a second through hole is formed in the lower jacket connecting pipe ring at a position corresponding to the lower jacket;
and the positions of the two sides of the U-shaped pipe section of the upper and lower jacket connecting pipes, which correspond to the lower jacket, are respectively provided with a third through hole, and the positions of the two straight pipe sections, which correspond to the water outlet space in the upper jacket, are respectively provided with a fourth through hole.
Furthermore, four guide plates are arranged in the lower jacket so that cooling water flowing out of the second through holes on the upper jacket connecting pipe ring and the lower jacket connecting pipe ring enters the lower jacket and then flows back and forth on two sides of the lower jacket respectively and then enters the third through holes of the upper jacket connecting pipe and the lower jacket connecting pipe.
Further, two sides of the bottom of the lower jacket are respectively provided with a first guide plate along the length direction, one end of each first guide plate is connected with the upper jacket connecting pipe ring and the lower jacket connecting pipe ring and is not communicated, the other end of each first guide plate extends to the tail end of the lower jacket and keeps a certain gap with the U-shaped pipe section of the upper jacket connecting pipe and the lower jacket connecting pipe, the positions of the second through holes on the upper jacket connecting pipe ring and the lower jacket connecting pipe ring correspond to the space surrounded by the two first guide plates, the lower outer jacket and the lower inner jacket, so that cooling water flowing out of the upper jacket connecting pipe ring and the lower jacket connecting pipe ring enters the space and flows out of the tail end of the space;
and one end of the second guide plate extends to the upper jacket connecting pipe ring and the lower jacket connecting pipe ring, a certain gap is reserved, and the other end of the second guide plate is not communicated with the inner wall of the lower jacket and is positioned below the third through hole.
Furthermore, the second guide plate is two-section and is connected in a fold line, one section is parallel to the first guide plate, one end of the second guide plate is close to the upper jacket connecting pipe ring and the lower jacket connecting pipe ring, a certain gap is reserved, and the other section is not communicated with the inner wall of the lower jacket and is positioned between the tail end of the first guide plate and the third through hole.
Further, the lower part of the sealing plate is provided with a supporting structure in a downward extending mode.
Still further, the cell body is equipped with the supporting legs, the upper and lower jacket connecting pipe outside is equipped with the angle steel connecting piece, inlet tube and outlet pipe set up on the mounting panel, angle steel connecting piece and supporting legs weld together.
Furthermore, the tank body is made of a steel structure.
The invention has the beneficial effects that:
1. The special guide plate and baffle plate structures are arranged in the jacket of the molten material chute, cooling water flows along the direction indicated by the arrow between the inner jacket and the outer jacket of the molten material chute during operation, the cooling water is fully baffled, the temperature distribution of the inner jacket of the molten material chute is uniform, the thermal stress is small, the service life of the molten material chute can be effectively prolonged, and the service life of the molten material chute can reach more than 12 months.
2. The cooling water inlet and outlet pipes of the molten material chute are all positioned at the upper part of the chute, the pipeline arrangement is simple, and the molten material chute is easy and convenient to detach.
Drawings
FIG. 1 is a perspective view of one view of a chute of the present invention;
FIG. 2 is a perspective view of one view of the chute of the present invention;
FIG. 3 is a perspective view of the chute of the present invention with the water inlet and outlet tubes removed from one view;
FIG. 4 is a front view of a chute of the present invention;
FIG. 5 is a top plan view of the chute of the present invention;
FIG. 6 is a schematic view of the internal structure of the jacket at the melt inlet of the chute of the present invention;
FIG. 7 is a cross-sectional view of the interior of the jacket at the smelt inlet port of the chute of the present invention;
FIG. 8 is a schematic view of the structure of the upper and lower jacket connecting pipe rings of the chute of the present invention;
FIG. 9 is a schematic view of the inlet pipe portion of the chute of the present invention;
FIG. 10 is a schematic view of a portion of the outlet pipe structure of the chute of the present invention;
FIG. 11 is a schematic view of the structure of the upper and lower jacket connection pipes of the chute of the present invention;
Wherein: 1. an upper jacket; 101. a water inlet space; 102. a water outlet space; 103. an upper outer jacket; 104. an upper inner jacket; 105. a water inlet; 106. a water outlet; 2. a lower jacket; 201. a lower outer jacket; 202. a lower inner jacket; 3. a partition plate; 4. a water inlet pipe; 5. a water outlet pipe; 6. The upper jacket and the lower jacket are connected with the pipe ring; 601. a first through hole; 602. a second through hole; 7. an upper jacket connecting pipe and a lower jacket connecting pipe; 701. a straight pipe section; 702. a U-shaped tube section; 703. a third through hole; 704. a fourth through hole; 8. a sealing plate; 9. a first deflector; 10. a second deflector; 11. supporting feet; 12. angle steel connecting pieces; 13. and (3) mounting a plate.
Detailed Description
The invention will be further described with reference to specific examples for better illustrating the objects, technical solutions and advantages of the invention. This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art, and the present invention will only be defined by the appended claims.
As shown in fig. 1-11, a molten material chute of an alkali recovery boiler has a hollow jacket structure, and comprises an upper jacket 1 and a lower jacket 2. The tank body is made of a steel structure, and one of S30408 (304), S30403 (304L), S31608 (316), S310603 (316L), S31008 (310S), S22053 (2205), Q245R, Q345R and 20# is selected. The thickness of the inner jacket steel plate and the outer jacket steel plate can be 6mm, 8mm and 10mm. The external diameter dimension of the connecting pipe between the inner jacket and the outer jacket can be selected from 28mm, 30mm, 32mm, 34mm and 36mm. All parts of the chute are connected in a welding structure.
The upper jacket 1 is internally provided with a baffle plate 3 for dividing the upper jacket 1 into a water inlet space 101 and a water outlet space 102, the water inlet space 101 is externally connected with a water inlet pipe 4, the water outlet space 102 is externally connected with a water outlet pipe 5, the water inlet space 101 is communicated with the lower jacket 2, and the lower jacket 2 is communicated with the water outlet space 102. The cooling water inlet pipe 4 and the cooling water outlet pipe 5 of the fusion chute are positioned at the upper part of the chute, the pipeline arrangement is simple, and the disassembly of the fusion chute is simple and convenient.
As one example, the lower jacket 2 has a U-shaped long groove structure with an inclined arrangement, and comprises a lower outer jacket 201 and a lower inner jacket 202, and the tail ends and two upper end surfaces of the lower outer jacket 201 and the lower inner jacket 202 are sealed by an upper jacket connecting pipe 7 and a lower jacket connecting pipe 7. The structure of the upper and lower jacket connection pipes 7 is shown in fig. 11, and the upper and lower jacket connection pipes 7 are composed of two straight pipe sections 701 and a U-shaped pipe section 702, the two straight pipe sections 701 being located at the two upper end surfaces of the lower outer jacket 201 and the lower inner jacket 202 and sealing them, and the one U-shaped pipe section 702 being located at the tail ends of the lower outer jacket 201 and the lower inner jacket 202 and sealing them.
The upper jacket 1 is in a circular arc structure and is arranged right above the front ends of the upper jacket connecting pipes 7, the front ends of the upper jacket 1, the upper jacket connecting pipes 7 and the lower jacket 2 jointly enclose a cylindrical melt inlet, and high-temperature melt enters the chute from the melt inlet to exchange heat with cooling water in the chute jacket.
The upper jacket 1 comprises an upper outer jacket 103 and an upper inner jacket 104, the tail ends of the upper outer jacket 103 and the upper inner jacket 104 are sealed by a sealing plate 8, and the sealing plate 8 is used for forming a closed space with the upper outer jacket 103 and the upper inner jacket 104 so that cooling water flows in the space.
The lower part of the sealing plate 8 is provided with a supporting structure in a downward extending way to support the chute of the invention. The head ends of the upper jacket 1 and the lower jacket 2 are sealed by annular upper and lower jacket connecting pipe rings 6.
Two partition plates 3 are arranged in the upper jacket 1 along the length direction, and the partition plates 3 are used for separating the inlet water and the outlet water of the cooling water. The two baffles 3, the upper outer jacket 103, the upper inner jacket 104 and the upper and lower jackets are connected with the inner sides of the pipe rings 6 to form a water inlet space 101, a water inlet 105 is arranged on the sealing plate 8 corresponding to the water inlet space 101, and the water inlet 105 is communicated with the water inlet pipe 4. The baffle 3 encloses a water outlet space 102 with an upper outer jacket 103, an upper inner jacket 104, upper end surfaces of the upper jacket connecting pipes 7 and the lower jacket connecting pipes 7, two water outlet spaces 102 are arranged, a water outlet 106 is arranged on the sealing plate 8 corresponding to the positions of the water outlet spaces 102, and the water outlet 106 is communicated with the water outlet pipe 5.
The structure of the upper and lower jacket connecting pipe rings 6 is shown in fig. 8, a first through hole 601 is arranged on the upper and lower jacket connecting pipe rings 6 corresponding to the water inlet space 101, and a second through hole 602 is arranged on the lower jacket 2.
As shown in fig. 11, the structure of the upper and lower jacket connection pipes 7 is that the positions of the two sides of the U-shaped pipe section 702 of the upper and lower jacket connection pipes 7 corresponding to the lower jacket 2 are respectively provided with a third through hole 703, and the positions of the two straight pipe sections 701 corresponding to the water outlet space 102 in the upper jacket 1 are respectively provided with a fourth through hole 704.
Further, a deflector is arranged in the lower jacket 2, and the deflector is arranged along the length direction of the lower jacket 2, so that cooling water flows back and forth in the lower jacket 2 and then flows out of the lower jacket 2 after entering the lower jacket 2.
As one example, four baffles are provided in the lower jacket 2 to allow the cooling water flowing out of the second through holes 602 on the upper and lower jacket connection pipe rings 6 to enter the lower jacket 2 and then to flow back and forth on both sides of the lower jacket 2 and then enter the third through holes 703 of the upper and lower jacket connection pipe 7.
Specifically, two sides of the bottom of the lower jacket 2 are respectively provided with a first guide plate 9 along the length direction, one end of each first guide plate 9 is connected with the upper jacket connecting pipe ring 6 and is not communicated with the lower jacket connecting pipe ring 6, the other end of each first guide plate extends to the tail end of the lower jacket 2 and keeps a certain gap with the U-shaped pipe section 702 of the upper jacket connecting pipe 7, the positions of the second through holes 602 on the upper jacket connecting pipe ring 6 and the lower jacket connecting pipe ring 6 correspond to the space surrounded by the two first guide plates 9, the lower outer jacket 201 and the lower inner jacket 202, so that cooling water flowing out of the upper jacket connecting pipe ring 6 and the lower jacket connecting pipe ring 6 enters the space and flows out of the tail end of the space.
A second deflector 10 is arranged above each first deflector 9, one end of the second deflector 10 extends to the upper jacket connecting pipe ring 6 and the lower jacket connecting pipe ring 6 with a certain gap, and the other end is not communicated with the inner wall of the lower jacket 2 and is positioned below the position of the third through hole 703.
Further, the second deflector 10 is two-stage and is connected in a fold line, wherein one stage is parallel to the first deflector 9, one end of the second deflector is close to the upper jacket connecting pipe ring 6 and the lower jacket connecting pipe ring 6, a certain gap is reserved, and the other stage is not communicated with the inner wall of the lower jacket 2 and is positioned between the tail end of the first deflector 9 and the third through hole 703. The second deflector 10 divides the space above the first deflector 9 into two parts, the first deflector 9 and the second deflector 10 divide each side of the lower jacket 2 into three parts, and the cooling water flows into the upper and lower jacket connecting pipes 7 from the third through holes 703 after S-shaped baffling in the cooling water.
Furthermore, the tank body is provided with supporting feet 11, the outer side of the upper jacket connecting pipe 7 and the lower jacket connecting pipe 7 is provided with angle steel connecting pieces 12, the water inlet pipe 4 and the water outlet pipe 5 are arranged on the mounting plate 13, and the mounting plate 13, the angle steel connecting pieces 12 and the supporting feet 11 are welded together.
When the molten material chute works, cooling water flows in the direction indicated by the arrow between the inner jacket and the outer jacket of the molten material chute, the cooling water is fully baffled, the temperature distribution of the inner jacket of the molten material chute is uniform, the thermal stress is small, the service life of the molten material chute can be effectively prolonged, and the service life of the molten material chute can reach more than 12 months.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110338556.1A CN112856460B (en) | 2021-03-30 | 2021-03-30 | A smelt chute for alkali recovery boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110338556.1A CN112856460B (en) | 2021-03-30 | 2021-03-30 | A smelt chute for alkali recovery boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112856460A CN112856460A (en) | 2021-05-28 |
| CN112856460B true CN112856460B (en) | 2024-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110338556.1A Active CN112856460B (en) | 2021-03-30 | 2021-03-30 | A smelt chute for alkali recovery boiler |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215570534U (en) * | 2021-03-30 | 2022-01-18 | 武汉凯比思电力设备有限公司 | Melt chute of alkali recovery boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5437768A (en) * | 1993-10-28 | 1995-08-01 | The Babcock & Wilcox Company | Non-baffled low pressure drop vacuum cooled inserted smelt spout |
| US7735435B2 (en) * | 2006-05-24 | 2010-06-15 | Diamond Power International, Inc. | Apparatus for cleaning a smelt spout of a combustion device |
| CN109915840A (en) * | 2019-03-25 | 2019-06-21 | 北京航化节能环保技术有限公司 | A kind of smelt spout device with automatic dredging function |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215570534U (en) * | 2021-03-30 | 2022-01-18 | 武汉凯比思电力设备有限公司 | Melt chute of alkali recovery boiler |
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