CN219889531U - Multi-stage air distribution biomass briquette fuel boiler - Google Patents
Multi-stage air distribution biomass briquette fuel boiler Download PDFInfo
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- CN219889531U CN219889531U CN202321526275.XU CN202321526275U CN219889531U CN 219889531 U CN219889531 U CN 219889531U CN 202321526275 U CN202321526275 U CN 202321526275U CN 219889531 U CN219889531 U CN 219889531U
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- fuel boiler
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- stage air
- biomass briquette
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- 239000002028 Biomass Substances 0.000 title claims abstract description 41
- 239000000446 fuel Substances 0.000 title claims abstract description 34
- 238000009826 distribution Methods 0.000 title claims abstract description 27
- 239000004484 Briquette Substances 0.000 title claims abstract description 19
- 230000005855 radiation Effects 0.000 claims abstract description 33
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003546 flue gas Substances 0.000 claims abstract description 23
- 238000002485 combustion reaction Methods 0.000 claims abstract description 16
- 239000000779 smoke Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000010304 firing Methods 0.000 claims description 13
- 239000012528 membrane Substances 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 238000004939 coking Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241001464837 Viridiplantae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
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- Solid-Fuel Combustion (AREA)
Abstract
The utility model discloses a multi-stage air distribution biomass briquette fuel boiler, and belongs to the technical field of boiler manufacturing. The boiler solves the defects of ash and corrosion in heated area, easy coking in a hearth area, high flue gas temperature and high original emission of nitrogen oxides in the traditional biomass briquette fuel boiler in the prior art. The main structure of the multi-stage air distribution device comprises a layer combustion chain belt grate, a radiation front arch, a combustion supporting rear arch, a film type wall tube screen system and an upper steam drum, wherein a biomass fuel feeding system is arranged above the front row of the layer combustion chain belt grate, a multi-stage air distribution system is arranged above the radiation front arch, the upper part of the film type wall tube screen system is connected with the upper steam drum, a cyclone radiation chamber is arranged at a flue gas outlet above the film type wall tube screen system, a convection tube bundle is arranged at the rear part of the cyclone radiation chamber, the upper end of the convection tube bundle is connected with the upper steam drum, the lower end of the convection tube bundle is connected with a lower water drum, a connecting turning smoke box is arranged at the rear part of the convection tube bundle, and a multi-stage economizer is arranged at the vertical lower part of the connecting turning smoke box. The utility model is mainly used for the fuel boiler.
Description
Technical Field
The utility model belongs to the technical field of boiler manufacturing, and particularly relates to a multi-stage air distribution biomass briquette fuel boiler.
Background
The related activities of energy production and consumption are the most main carbon dioxide emission sources, and the carbon emission reduction in the field of energy is an important measure for doing carbon-to-peak carbon neutralization work and accelerating the construction of a modern energy system. Among the renewable energy sources, biomass energy is an energy form in which solar energy is stored in biomass in a chemical energy form, and photosynthesis of the biomass directly or indirectly from green plants has the characteristic of zero emission of carbon dioxide, so that the biomass energy is an environment-friendly sustainable renewable energy source. The biomass resources are rich in the world, and the development potential is huge. The biomass energy has the advantages of convenient storage, transportation and utilization, and can be utilized by direct combustion, liquefaction, gasification, thermal cracking and other ways. Therefore, the research and popularization of the biomass energy boiler in China with the shortage of energy are of great significance. At present, the existing biomass boiler generally has the problems that a heating surface is easy to accumulate ash and corrode, a hearth area is easy to coke, the temperature of flue gas and the original emission of nitrogen oxides are high, and the like.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, and provides a multi-stage air distribution biomass briquette fuel boiler which is low in cost, wide in raw material source and compact in structure, combustion is improved through multi-stage air distribution, excess air coefficient is controlled, membrane type wall tube panels are arranged around combustion rising flue gas, the residence time of the flue gas in the boiler is prolonged by a cyclone radiation chamber, solid particles in the flue gas are greatly reduced, and the flue gas temperature is further reduced by a three-stage economizer, an air preheater and an energy saver.
In order to achieve the above purpose, the present utility model is realized by adopting the following technical scheme:
the utility model provides a multistage air distribution biomass briquette fuel boiler, includes layer fire chain belt grate, radiation front arch, combustion-supporting back arch, diaphragm type wall tube panel system and last steam pocket, biomass fuel feed system is installed to layer fire chain belt grate's front row top, layer fire chain belt grate, radiation front arch, combustion-supporting back arch and diaphragm type wall tube panel system constitute burning flue gas heat transfer space, multistage air distribution system is installed to the radiation front arch top, diaphragm type wall tube panel system top is connected with last steam pocket, and diaphragm type wall tube panel system top flue gas exit is provided with whirlwind radiation room, whirlwind radiation room rear portion is provided with the convection bank, convection bank upper end is connected with last steam pocket, the lower extreme is connected with the lower water pocket, the connection turn smoke box is installed at convection bank rear portion, the multistage economizer is installed to connection turn smoke box vertical lower part.
Preferably, the bottom of the water drum is provided with a concentrated descending pipe, and the lower end of the concentrated descending pipe is connected with the lower part of the membrane type wall pipe screen system.
Preferably, the middle upper part of the grate firing chain belt is provided with a full-sealed access door.
Preferably, the ash discharging device is arranged at the lower part of the front row of the grate firing chain belt, and the slag discharging system is arranged below the tail part.
Preferably, a hanging support device is arranged at the upper part of the combustion-supporting rear arch.
Preferably, the multi-stage economizer comprises a three-stage economizer, a two-stage economizer and a one-stage economizer which are vertically installed in sequence.
Preferably, an air preheater is arranged right below the primary economizer, and the air preheater is connected with the outlet smoke box through an economizer.
Preferably, a steam-water separator is installed in the upper steam drum.
Preferably, the radiation front arch forms an included angle of 120 degrees with the vertical direction.
Preferably, the combustion-supporting rear arch forms an included angle of 9-11 degrees with the horizontal direction.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the utility model, the multistage air distribution system is arranged, so that the air excess coefficient is reduced, the problems that the heated surface of biomass fuel is easy to accumulate ash and the tube bundle is easy to corrode are solved, the generation amount of nitrogen oxides is reduced, the overall thermal efficiency of the boiler is greatly improved, and the long-term stable and safe operation of the boiler is ensured;
2. the utility model ensures the full combustion of biomass fuel through the radiation front arch and the combustion-supporting rear arch, greatly improves and promotes the combustion efficiency, and solves the problem that the biomass fuel is easy to slag;
3. the cyclone radiation chamber is adopted, so that the residence time of the flue gas in the furnace is increased, the content of solid particles in the biomass fuel flue gas is greatly reduced, the radiation heat is further absorbed, the heat efficiency is increased, the initial emission concentration of the boiler flue dust is reduced, and the cost is saved for subsequent flue gas treatment;
4. the tail part of the utility model is provided with the multi-stage economizer, the air preheater and the energy economizer, so that the exhaust gas temperature of the system under the wide load state operation is ensured, and the exhaust gas heat loss is reduced.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
In the figure: 1. a biomass fuel feed system; 2. grate firing chain belt grate; 3. an ash discharge device; 4. a slag discharging system; 5. radiating the front arch; 6. a combustion-supporting rear arch; 7. a fully sealed access door; 8. a membrane wall tube panel system; 9. a hanging support device; 10. a multi-stage air distribution system; 11. centralizing the downcomers; 12. a cyclone radiation chamber; 13. loading a steam drum; 14. a steam-water separator; 15. a convection bank; 16. discharging the water bag; 17. connecting a turning smoke box; 18. a three-stage economizer; 19. a secondary economizer; 20. a primary economizer; 21. an air preheater; 22. an energy-saving device; 23. and (5) outputting a smoke box.
Detailed Description
The utility model will now be further illustrated by means of specific examples in connection with the accompanying drawings.
Example 1:
as shown in fig. 1, the multi-stage air distribution biomass briquette fuel boiler comprises a grate 2 of a grate firing chain belt, a front radiation arch 5, a rear combustion-supporting arch 6, a membrane type wall tube panel system 8 and an upper steam drum 13, wherein a biomass fuel feeding system 1 is arranged above the front row of the grate 2 of the grate firing chain belt, the front radiation arch 5, the rear combustion-supporting arch 6 and the membrane type wall tube panel system 8 form a combustion flue gas heat exchange space, a multi-stage air distribution system 10 is arranged above the front radiation arch 5, the upper part of the membrane type wall tube panel system 8 is connected with the upper steam drum 13, a cyclone radiation chamber 12 is arranged at a flue gas outlet above the membrane type wall tube panel system 8, a convection tube bundle 15 is arranged at the rear part of the cyclone radiation chamber 12, the upper end of the convection tube bundle 15 is connected with the upper steam drum 13, the lower end of the convection tube bundle 15 is connected with a lower water drum 16, a connecting turning smoke box 17 is arranged at the rear part of the convection tube bundle 15, and a multi-stage economizer is arranged at the vertical lower part of the connecting turning smoke box 17.
Example 2:
a multi-stage air distribution biomass briquette fuel boiler is characterized in that a concentrated downcomer 11 is arranged at the bottom of a lower water drum 16, and the lower end of the concentrated downcomer 11 is connected with the lower part of a membrane type wall tube panel system 8.
The middle upper part of the grate 2 of the grate firing chain belt is provided with a full-sealed access door 7; the ash discharging device 3 is arranged at the lower part of the front row of the grate 2 of the grate-fired chain belt, and the slag discharging system 4 is arranged below the tail part; the upper part of the combustion-supporting rear arch 6 is provided with a hanging supporting device 9.
The multi-stage economizer comprises a three-stage economizer 18, a two-stage economizer 19 and a first-stage economizer 20 which are vertically installed in sequence, an air preheater 21 is arranged right below the first-stage economizer 20, and the air preheater 21 is connected with an outlet smoke box 23 through an economizer 22.
Further, a steam-water separator 14 is installed in the upper steam drum 13, an included angle of 120 degrees is formed between the radiation front arch 5 and the vertical direction, and an included angle of 9-11 degrees is formed between the combustion-supporting rear arch 6 and the horizontal direction. The other parts are the same as in example 1.
The working principle of the utility model is as follows:
biomass fuel passes through the biomass fuel feeding system 1 and enters the grate 2 of the grate firing chain belt to burn to generate high-temperature flue gas, the radiation front arch 5 projects a large amount of radiation heat to the middle part of the grate 2 of the grate firing chain belt, the temperature in the furnace is increased, and the stable burning of the biomass fuel is ensured by the low combustion-supporting rear arch 6. The fully-sealed access door 7 facilitates the equipment maintenance and simultaneously avoids unnecessary heat loss and environmental pollution caused by the leakage of flame and smoke. The high-temperature flue gas of combustion rises to exchange heat with a membrane type wall tube screen system 8 arranged around, the products of biomass fuel combustion are discharged along with the rotation of the grate 2 of the grate firing chain belt by the ash discharging device 3 at the front part of the grate 2 of the grate firing chain belt, and the larger ash is discharged by the slag discharging system 4 at the rear part of the grate 3 of the grate firing chain belt; the multistage air distribution system 10 arranged above the radiation front arch 5 distributes air in real time according to combustion conditions, under the condition of ensuring stable combustion, the excessive air coefficient is minimum, high-temperature flue gas rises to the top of the membrane wall tube panel system 8 and the bottom of the upper steam drum 13 and then enters the cyclone radiation chamber 12, the flue gas is subjected to strong rotation disturbance while carrying out radiation heat exchange in the cyclone radiation chamber 12, a large amount of fixed particles in biomass fuel combustion flue gas are separated and settled out, and the flue gas enters a convection tube bundle 15 connected with the upper part of the cyclone radiation chamber 12 and the bottom of the upper steam drum 13 and the lower water drum 16 for further heat exchange. The medium in the upper steam drum 13 is changed into high-quality steam through the steam-water separator 14 to be output, and the medium water in the lower water drum 16 is converged into the membrane wall tube panel system 8 through the centralized downcomer 11; the high temperature flue gas passes through the third-stage economizer 18, the second-stage economizer 19 and the first-stage economizer 20 downwards in sequence through the connecting turning smoke box 17, then enters the air preheater 21, after being heated to room temperature, flows into the energy economizer 22 for further convection and radiation heat exchange, the temperature is reduced to about 120 ℃, and finally flows out through the outlet smoke box 23 for further treatment.
Claims (10)
1. A multistage air distribution biomass briquette fuel boiler is characterized in that: including layer fire chain belt grate (2), radiation front arch (5), after-combustion arch (6), diaphragm type wall tube screen system (8) and last steam pocket (13), biomass fuel feed system (1) is installed to the preceding row top of layer fire chain belt grate (2), before-radiation arch (5), after-combustion arch (6) and diaphragm type wall tube screen system (8) constitute burning flue gas heat transfer space, multistage air distribution system (10) are installed to before-radiation arch (5) top, diaphragm type wall tube screen system (8) top is connected with last steam pocket (13), and diaphragm type wall tube screen system (8) top flue gas exit is provided with whirlwind radiation chamber (12), whirlwind radiation chamber (12) rear portion is provided with convection current tube bank (15), convection current tube bank (15) upper end is connected with last steam pocket (13), the lower extreme is connected with lower water drum (16), convection current tube bank (15) rear portion is installed and is connected smoke box (17), connect the coal-turning economizer is installed to the perpendicular lower part of turning smoke box (17).
2. The multi-stage air distribution biomass briquette fuel boiler as set forth in claim 1, wherein: the bottom of the water drum (16) is provided with a concentrated descending pipe (11), and the lower end of the concentrated descending pipe (11) is connected with the lower part of the membrane type wall pipe screen system (8).
3. The multi-stage air distribution biomass briquette fuel boiler as set forth in claim 2, wherein: the middle upper part of the grate (2) of the grate firing chain belt is provided with a full-sealed access door (7).
4. A multi-stage air-distribution biomass briquette fuel boiler as set forth in claim 3, wherein: the front lower part of the grate (2) of the grate firing chain belt is provided with an ash discharging device (3), and the lower part of the tail part is provided with a slag discharging system (4).
5. The multi-stage air distribution biomass briquette fuel boiler as set forth in claim 4, wherein: the upper part of the combustion-supporting rear arch (6) is provided with a hanging supporting device (9).
6. The multi-stage air-distribution biomass briquette fuel boiler as set forth in any one of claims 1 to 5, wherein: the multi-stage economizer comprises a three-stage economizer (18), a two-stage economizer (19) and a first-stage economizer (20) which are vertically installed in sequence.
7. The multi-stage air-distribution biomass briquette fuel boiler as set forth in claim 6, wherein: an air preheater (21) is arranged right below the primary economizer (20), and the air preheater (21) is connected with an outlet smoke box (23) through an economizer (22).
8. The multi-stage air-distribution biomass briquette fuel boiler as set forth in claim 7, wherein: the upper steam drum (13) is internally provided with a steam-water separator (14).
9. The multi-stage air-distribution biomass briquette fuel boiler as set forth in any one of claims 1 to 5, wherein: the radiation front arch (5) forms an included angle of 120 degrees with the vertical direction.
10. The multi-stage air-distribution biomass briquette fuel boiler as set forth in any one of claims 1 to 5, wherein: the included angle between the combustion-supporting rear arch (6) and the horizontal direction is 9-11 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321526275.XU CN219889531U (en) | 2023-06-15 | 2023-06-15 | Multi-stage air distribution biomass briquette fuel boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321526275.XU CN219889531U (en) | 2023-06-15 | 2023-06-15 | Multi-stage air distribution biomass briquette fuel boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219889531U true CN219889531U (en) | 2023-10-24 |
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ID=88400469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321526275.XU Active CN219889531U (en) | 2023-06-15 | 2023-06-15 | Multi-stage air distribution biomass briquette fuel boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219889531U (en) |
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2023
- 2023-06-15 CN CN202321526275.XU patent/CN219889531U/en active Active
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