CN116516708A - Optimized arrangement structure of small alkali recovery boiler - Google Patents
Optimized arrangement structure of small alkali recovery boiler Download PDFInfo
- Publication number
- CN116516708A CN116516708A CN202310630449.5A CN202310630449A CN116516708A CN 116516708 A CN116516708 A CN 116516708A CN 202310630449 A CN202310630449 A CN 202310630449A CN 116516708 A CN116516708 A CN 116516708A
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- China
- Prior art keywords
- ash
- ash bucket
- pipe
- recovery boiler
- tube
- 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.)
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- 239000003513 alkali Substances 0.000 title claims abstract description 32
- 238000011084 recovery Methods 0.000 title claims abstract description 29
- 238000002485 combustion reaction Methods 0.000 claims abstract description 21
- 238000007599 discharging Methods 0.000 claims abstract description 21
- 238000001704 evaporation Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000013049 sediment Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000012774 insulation material Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 abstract description 18
- 230000008020 evaporation Effects 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000008021 deposition Effects 0.000 abstract description 5
- 238000009833 condensation Methods 0.000 abstract 5
- 230000005494 condensation Effects 0.000 abstract 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 5
- 235000011941 Tilia x europaea Nutrition 0.000 description 5
- 239000004571 lime Substances 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
Abstract
The invention discloses an optimized arrangement structure of a small alkali recovery boiler, which comprises a combustion chamber, a convection tube bundle, a condensation tube, a vertical evaporation tube panel, an economizer, ash, an ash bucket and an ash discharging tube, wherein the convection tube bundle is arranged above the combustion chamber, the condensation tube is arranged behind the flow tube bundle, the vertical evaporation tube panel is arranged behind the condensation tube, the economizer is arranged behind the vertical evaporation tube panel, the ash bucket is arranged between the condensation tube and the vertical evaporation tube panel, the ash directly falls into the ash bucket after passing through the condensation tube, the ash discharging tube is arranged at the lower end of the ash bucket, and a star-shaped ash discharging valve is arranged between the ash discharging tube and a scraper and can guide ash into the scraper. By utilizing the optimized arrangement structure of the small alkali recovery boiler, ash deposition on the lower surface of the horizontal flue at the rear end of the slag condensing pipe at the outlet of the hearth can be avoided, the shutdown ash removal times of the alkali boiler can be reduced, and the production capacity of the alkali recovery boiler can be improved.
Description
Technical Field
The invention relates to the technical field of pulping and papermaking chemical recovery, in particular to an optimized arrangement structure of a small alkali recovery boiler.
Background
The alkali recovery boiler is used in the current paper mill, so that alkali used in paper making can be recovered (the recovery rate of the furnace body is more than 95%), heat and power can be supplied for generating, and the comprehensive effects of recovery, energy conservation and pollution reduction are achieved. The alkali recovery boiler consists of a combustion chamber and a boiler. The furnace wall, the furnace top and the furnace bottom of the combustion chamber are all composed of water-cooled wall pipes with fins, the combustion chamber is connected with a boiler into a whole, and the combustion chamber is composed of an upper steam drum, a lower steam drum, a convection tube bundle, a water-cooled screen tube bundle or a slag condensing pipe, a vertical evaporation tube screen, an economizer and the like. In the operation process of the alkali furnace, the ash deposition is unavoidable, the sources of the ash deposition mainly are the fused mass entrained in the flue gas or the black liquor particles after partial combustion and the smoke dust generated in the hearth, the lower surface of the flue at the rear end of the slag condensing pipe is closer to the front end of the vertical evaporation pipe screen, a large amount of ash deposition is easy to generate, when the ash is accumulated to a certain height, the normal circulation of the flue gas is blocked, the production capacity of the alkali recovery boiler is reduced, the normal production of the system cannot be maintained, and the ash is removed by stopping the furnace. Each time the furnace is shut down for ash removal, production can be influenced, so that the operation efficiency is improved, the furnace shut down ash removal time is shortened, the potential safety hazard of ash removal of the alkali recovery boiler is solved, the labor intensity is reduced, and the problem is urgently solved, so that a new optimized arrangement structure of the small-sized alkali recovery boiler is necessary to be designed to solve the problem.
Disclosure of Invention
The invention aims to provide an optimized arrangement structure of a small alkali recovery boiler, which aims to solve at least one technical problem in the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a small-size alkali recovery boiler optimizes arrangement structure, includes combustion chamber, convection bank, lime set pipe, perpendicular evaporating tube screen, economizer, lime-ash, ash bucket and ash pipe down, the top of combustion chamber sets up the convection bank, the flow bank rear sets up the lime set pipe, the lime set pipe rear sets up perpendicular evaporating tube screen, the economizer has been arranged at perpendicular evaporating tube screen rear set up the ash bucket between lime set pipe and the perpendicular evaporating tube screen, the lime-ash directly falls into the ash bucket behind the lime-ash through the lime set pipe, the lower extreme of ash bucket sets up ash pipe down.
Preferably, the combustion chamber comprises a furnace wall, a furnace roof and a furnace bottom, and the furnace wall, the furnace roof and the furnace bottom of the combustion chamber are all composed of film type water wall pipes with fins.
Preferably, the ash bucket opening is upward, and the ash bucket is funnel-shaped.
Preferably, the width of the upper end of the ash bucket is larger than that of the lower end, the lower end of the ash bucket is of a necking structure, and a ash discharging pipe is connected to the necking position of the lower end of the ash bucket.
Preferably, the ash discharging pipe guides ash to the scraper machine through a star-shaped ash discharging valve, and the star-shaped ash discharging valve is arranged between the ash discharging pipe and the scraper machine.
Preferably, the upper end of the ash bucket is composed of a film type water wall pipe with fins, and the upper end and the lower end of the ash bucket are both made of steel plates and heat insulation materials.
Compared with the prior art, the small alkali recovery boiler optimizing arrangement structure provided by the invention has the following beneficial effects:
1. by arranging the ash bucket opening to upwards replace the lower surface of the flue before the original optimization, the ash accumulation on the lower surface of the horizontal flue at the rear end of the slag condensing pipe at the outlet of the hearth can be avoided.
2. Through setting up ash bucket and ash pipe down, can be with the lime-ash leading-in scraper conveyor of ash bucket and ash pipe down, reduce alkali stove stop stove deashing number of times, improve alkali recovery boiler throughput to further improved production efficiency.
3. By arranging the characteristics that the ash bucket is funnel-shaped, has wide upper part and narrow lower part, ash 7 can directly fall into the ash bucket, and the ash bucket is funnel-shaped, so that the ash bucket has simple structure, reasonable design and low cost.
4. The upper end of the ash bucket is composed of a film type water wall pipe with fins, and the upper part of the ash bucket adopts a water wall structure, which has the functions that: absorbing the radiation heat of the flue gas, reducing the temperature of a furnace wall and protecting the furnace wall; ensuring the tightness of the furnace. 5. The upper end and the lower end of the ash bucket are made of steel plates and heat insulating materials, so that the ash bucket is simple in structure, fireproof, high-temperature-resistant, firm, heat-insulating, long in service life, low in maintenance cost, safe, reliable, energy-saving and environment-friendly.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the optimized arrangement structure of the small-sized alkali recovery boiler according to the present invention;
FIG. 2 is a schematic view of an arrangement of a small-sized alkali recovery boiler optimized for the former;
in the figure: 1. a combustion chamber; 2. a convection bank; 3. a slag condensing pipe; 4. a vertical evaporation tube panel; 5. an economizer; 6. the lower surface of the flue; 7. ash residues; 8. an ash bucket; 9. and (5) ash discharging pipes.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1-2, the present embodiment provides an optimized layout structure of a small-sized alkali recovery boiler, which comprises a combustion chamber 1, a convection tube bundle 2, a slag condensing tube 3, a vertical evaporation tube panel 4, an economizer 5, slag 7, a slag hopper 8 and a lower ash tube 9, wherein the convection tube bundle 2 is arranged above the combustion chamber 1, the slag condensing tube 3 is arranged behind the flow tube bundle 2, the vertical evaporation tube panel 4 is arranged behind the slag condensing tube 3, the economizer 5 is arranged behind the vertical evaporation tube panel 4, the slag hopper 8 is arranged between the slag condensing tube 3 and the vertical evaporation tube panel 4, the slag 7 directly falls into the slag hopper 8 after passing through the slag condensing tube 3, and the lower ash tube 9 is arranged at the lower end of the slag hopper 8; the ash discharging pipe 9 guides ash 7 into the scraper machine through a star-shaped ash discharging valve, and the star-shaped ash discharging valve is arranged between the ash discharging pipe 9 and the scraper machine.
In this embodiment, set up the ash bucket 8 opening and upwards replace the flue lower surface 6 before original optimization, can effectively avoid producing the deposition at the horizontal flue lower surface 6 of furnace export sediment pipe 3 rear end, increased ash bucket 8 in the below between the flue at sediment pipe 3 rear and perpendicular evaporation tube panel 4 the place ahead, ash 7 directly falls into ash bucket 8 behind the sediment pipe 3, ash bucket 8 lower extreme is equipped with ash bucket 8 to scraper conveyor's connecting pipe, ash pipe 9 down, can guide into scraper conveyor with ash 7, reduce alkali stove blowing out deashing number of times, improve alkali recovery boiler throughput.
In a specific embodiment, as shown in fig. 1-2, the combustion chamber 1 comprises a furnace wall, a furnace roof and a furnace floor, and the furnace wall, the furnace roof and the furnace floor of the combustion chamber 1 are each composed of a finned membrane waterwall tube.
The combustion chamber 1 and its furnace walls, roof and hearth in this embodiment belong to the prior art and are not described in detail here.
In a specific embodiment, as shown in fig. 1-2, the ash bucket 8 is opened upwards, and the ash bucket 8 is funnel-shaped; the width of the upper end of the ash bucket 8 is larger than that of the lower end, the lower end is of a necking structure, and a ash discharging pipe 9 is connected to the necking position of the lower end of the ash bucket 8.
In the embodiment, the ash bucket 8 is funnel-shaped, and the ash bucket 8 is wide in upper part and narrow in lower part, so that ash 7 can fall into the ash bucket 8 directly, and the ash 7 flows into the scraper conveyor through the slag condensing pipe 3, the ash bucket 8 and the ash discharging pipe 9 in sequence. The ash bucket 8 is in a funnel-shaped design, and is simple in structure, reasonable in design and low in cost, ash is effectively prevented from being deposited on the lower surface 6 of the horizontal flue at the rear end of the slag condensing pipe 3 at the outlet of the hearth through the funnel-shaped design of the ash bucket 8, the ash removal times of an alkali furnace in a shut-down mode are reduced, and the production capacity of the alkali recovery boiler is improved, so that the production efficiency is further improved.
In a specific embodiment, as shown in fig. 1-2, the upper end of the ash bucket 8 is composed of a film type water wall pipe with fins, and the upper end and the lower end of the ash bucket 8 are made of steel plates and heat insulation materials.
In this embodiment, the upper end of the ash bucket 8 is composed of a film type water wall pipe with fins, and a water wall structure is adopted at the upper part of the ash bucket 8, which has the following functions: absorbing the radiation heat of the flue gas, reducing the temperature of a furnace wall and protecting the furnace wall; ensuring the tightness of the furnace. The upper end and the lower end of the ash bucket 8 are made of steel plates and heat insulating materials, and the ash bucket is simple in structure, fireproof, high-temperature-resistant, firm, heat-insulating, long in service life, low in maintenance cost, safe, reliable, energy-saving and environment-friendly.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
1. An optimized arrangement structure of a small-sized alkali recovery boiler is characterized in that: including combustion chamber (1), convection bank (2), sediment pipe (3), perpendicular evaporating pipe screen (4), economizer (5), lime-ash (7), ash bucket (8) and ash pipe (9) down, the top of combustion chamber (1) sets up convection bank (2), flow pipe bank (2) rear sets up sediment pipe (3), sediment pipe (3) rear sets up perpendicular evaporating pipe screen (4), economizer (5) have been arranged at perpendicular evaporating pipe screen (4) rear set up ash bucket (8) between sediment pipe (3) and perpendicular evaporating pipe screen (4), ash (7) are direct to fall into ash bucket (8) behind sediment pipe (3), ash bucket (9) under the lower extreme setting of ash bucket (8).
2. The optimized arrangement structure of the small-sized alkali recovery boiler according to claim 1, wherein: the combustion chamber (1) comprises a furnace wall, a furnace top and a furnace bottom, and the furnace wall, the furnace top and the furnace bottom of the combustion chamber (1) are all composed of film type water wall pipes with fins.
3. The optimized arrangement structure of the small-sized alkali recovery boiler according to claim 1, wherein: the opening of the ash bucket (8) is upward, and the ash bucket (8) is funnel-shaped.
4. The optimized arrangement structure of the small-sized alkali recovery boiler according to claim 1, wherein: the width of the upper end of the ash bucket (8) is larger than that of the lower end, the lower end of the ash bucket is of a necking structure, and a ash discharging pipe (9) is connected to the necking position of the lower end of the ash bucket (8).
5. The optimized arrangement structure of the small-sized alkali recovery boiler according to claim 1, wherein: the ash discharging pipe (9) guides ash residues (7) into the scraper machine through a star-shaped ash discharging valve, and the star-shaped ash discharging valve is arranged between the ash discharging pipe (9) and the scraper machine.
6. The optimized arrangement structure of the small-sized alkali recovery boiler according to claim 1, wherein: the upper end of the ash bucket (8) is composed of a film type water wall pipe with fins, and the upper end and the lower end of the ash bucket (8) are both made of steel plates and heat insulation materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310630449.5A CN116516708A (en) | 2023-05-31 | 2023-05-31 | Optimized arrangement structure of small alkali recovery boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310630449.5A CN116516708A (en) | 2023-05-31 | 2023-05-31 | Optimized arrangement structure of small alkali recovery boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116516708A true CN116516708A (en) | 2023-08-01 |
Family
ID=87390336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310630449.5A Pending CN116516708A (en) | 2023-05-31 | 2023-05-31 | Optimized arrangement structure of small alkali recovery boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116516708A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202371732U (en) * | 2011-11-22 | 2012-08-08 | 中国航空规划建设发展有限公司 | Furnace bottom structure of boiler |
| CN202692089U (en) * | 2012-07-17 | 2013-01-23 | 自贡东联锅炉有限公司 | Light type membrane-wall water-cooling air hopper |
| US20150275427A1 (en) * | 2012-09-19 | 2015-10-01 | Valmet Technologies Oy | Arrangement and method in soda recovery boiler |
| CN215982491U (en) * | 2021-08-02 | 2022-03-08 | 上海四方无锡锅炉工程有限公司 | Pipe frame type waste heat recovery boiler matched with garbage pyrolysis incineration system |
| CN220057483U (en) * | 2023-05-31 | 2023-11-21 | 湖北凯比思智能设备有限公司 | Optimized arrangement structure of small alkali recovery boiler |
-
2023
- 2023-05-31 CN CN202310630449.5A patent/CN116516708A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202371732U (en) * | 2011-11-22 | 2012-08-08 | 中国航空规划建设发展有限公司 | Furnace bottom structure of boiler |
| CN202692089U (en) * | 2012-07-17 | 2013-01-23 | 自贡东联锅炉有限公司 | Light type membrane-wall water-cooling air hopper |
| US20150275427A1 (en) * | 2012-09-19 | 2015-10-01 | Valmet Technologies Oy | Arrangement and method in soda recovery boiler |
| CN215982491U (en) * | 2021-08-02 | 2022-03-08 | 上海四方无锡锅炉工程有限公司 | Pipe frame type waste heat recovery boiler matched with garbage pyrolysis incineration system |
| CN220057483U (en) * | 2023-05-31 | 2023-11-21 | 湖北凯比思智能设备有限公司 | Optimized arrangement structure of small alkali recovery boiler |
Non-Patent Citations (2)
| Title |
|---|
| 冯明驰等: "《锅炉设备运行技术问答》", 31 July 2004, 中国电力出版社, pages: 162 * |
| 王忠厚，高清河主编: "《制浆造纸设备与操作》", 31 May 2006, 中国轻工业出版社, pages: 218 - 219 * |
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