CN214891138U - Corner tube fluidized bed biomass boiler - Google Patents
Corner tube fluidized bed biomass boiler Download PDFInfo
- Publication number
- CN214891138U CN214891138U CN202022803011.7U CN202022803011U CN214891138U CN 214891138 U CN214891138 U CN 214891138U CN 202022803011 U CN202022803011 U CN 202022803011U CN 214891138 U CN214891138 U CN 214891138U
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- China
- Prior art keywords
- fluidized bed
- hearth
- ash
- spiral blade
- furnace arch
- 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.)
- Expired - Fee Related
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- 239000002028 Biomass Substances 0.000 title claims abstract description 28
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000002131 composite material Substances 0.000 claims abstract description 14
- 239000003546 flue gas Substances 0.000 claims abstract description 14
- 238000002485 combustion reaction Methods 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims abstract description 11
- 239000012528 membrane Substances 0.000 claims abstract description 6
- 239000000446 fuel Substances 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000002956 ash Substances 0.000 description 27
- 239000000463 material Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
A biomass boiler with an angular tube fluidized bed is characterized in that a secondary air pipe is distributed below a vertical hearth, the bottom of the vertical hearth is a fluidized bed, membrane water-cooled walls are arranged around the fluidized bed, convection tube bundles are arranged at the rear part of the fluidized bed, and a feeding device is arranged below the front part of the fluidized bed; an isobaric air chamber is arranged below the fluidized bed, and a connecting flue, an economizer and an air preheater are sequentially connected at the outlet of the flue; the lower part of the convection bank is provided with an automatic ash discharging device; a first composite furnace arch is arranged on the inner wall above the combustion area of the vertical hearth, a second composite furnace arch is arranged on the hearth wall above the opposite surface of the first furnace arch, so that high-temperature flue gas flow in the combustion area forms a Z-shaped route, and the horizontal included angle of the composite furnace arch is 25-35 degrees; a flame folding angle is arranged at a flue gas outlet of the hearth, and the horizontal included angle is 20-30 degrees. The feeding problems of the fluidized bed biomass boiler and the like are effectively solved.
Description
Technical Field
The utility model relates to a biomass boiler, in particular to an angle tube fluidized bed boiler which can adapt to biomass fuels with various shapes.
Background
At present, with the increasing demand for energy from society, fossil fuels, which are major energy sources, are rapidly decreasing. Therefore, the search for renewable alternative energy sources becomes a focus of general social attention. Biomass energy is an ideal renewable energy source, and has wide sources, and a large amount of industrial, agricultural and forest waste is produced every year. In the current energy consumption of the world, the biomass energy consumption accounts for 14 percent of the total energy consumption of the world, is second to coal, petroleum and natural gas and is third place. In developing countries, biomass can account for a greater proportion, up to over 50%. Designing an industrial boiler using biomass is one of the important ways that biomass can be utilized. The biomass fuel technology in China is developed rapidly in recent years, and the emission concentration of pollutants such as smoke dust, sulfur dioxide and nitrogen oxide is low under the condition that a special boiler is used and a bag type dust collector is matched, so that the limit value requirement of relevant standards can be met.
Along with the permission and encouragement of the national policy to develop the boiler for burning the biomass fuel, various biomass boilers appear on the market, such as the boiler for burning biomass particles and the chain grate boiler, which has compact structure and low price, but the chain grate has complex structure, is easy to break down, has low thermal efficiency and poor fuel adaptability; the bulk circulating fluidized bed boiler has high thermal efficiency and wide fuel adaptability, but has complex structure, large volume, expensive equipment price, high capital investment, high power consumption and high operation cost; a composite fluidized bed biomass boiler with high efficiency and low cost is produced in recent years, but the boiler type is restricted by the structure and cannot be enlarged.
Disclosure of Invention
An object of the utility model is to provide an angle pipe fluidized bed biomass boiler.
The technical scheme adopted by the implementation of the utility model is that a secondary air pipe (6) is distributed at the lower part of a vertical hearth, a fluidized bed (4) is arranged at the bottom, membrane type water cooling walls (8) are arranged around the lower part of the vertical hearth, a convection tube bundle (11) is arranged at the rear part of the vertical hearth, and a feeding device (1) is arranged below the front part of the vertical hearth; an isobaric air chamber (3) is arranged below the fluidized bed (4), and a connecting flue (13), an economizer (14) and an air preheater (15) are connected in sequence at the outlet of the flue; the lower part of the convection bank (11) is provided with an automatic ash discharging device (16); a first composite furnace arch (18b) is arranged on the inner wall above the combustion zone of the vertical furnace hearth, a second composite furnace arch (18a) is arranged on the furnace hearth wall above the opposite surface of the first furnace arch, so that high-temperature flue gas flow in the combustion zone forms a Z-shaped route, and the horizontal included angle of the composite furnace arches (18a and 18b) is 25-35 degrees; a flame folding angle (17) is arranged at a flue gas outlet of the hearth, and the horizontal included angle is 20-30 degrees; the feeding device (1) comprises a continuously variable transmission (103), the continuously variable transmission (103) is connected with a spiral blade shaft (101), the spiral blade shaft (101) is surrounded in a U-shaped shell (102), a hopper (105) is connected to the U-shaped shell (102), the lower part of the U-shaped shell (102) is 55-65 degrees open, the pitch of a spiral blade (106) is 200-300 mm to adapt to a large block-shaped material, the gap between the lower part of the spiral blade (106) and the U-shaped shell (102) is 18-22mm, the gap between the upper part and the lower part is 75-85mm, the spiral blade shaft (101) extends to the discharging port and is provided with a 400-500 mm non-blade shaft, a feeding pipe (2) is arranged below the non-blade shaft, and the fuel is fed into a hearth by the feeding pipe (2); a conical ash hopper (16d) is arranged below the convection tube bundle (11), a pneumatic valve (16b) is arranged at the bottom of the conical ash hopper (16d), a pulse ash loosening device (16c) is arranged at the lower part of the conical ash hopper, an ash level meter (16a) is arranged at the upper part of the conical ash hopper to prevent the ash from overflowing, and the conical ash hopper (16d), the pulse ash loosening device (16c), the ash level meter (16a) and the pneumatic valve (16b) form an automatic ash discharging device (16).
The beneficial effects of the utility model are that, to the biomass fuel of various shapes such as graininess, cubic, piece are strong, the shred form can not appear bridging card material putty phenomenon from pan feeding pay-off blanking process, solved fluidized bed biomass boiler feeding process's a difficult problem effectively. The fly ash of the convection bank is smoothly discharged by the automatic ash discharging device. The heat storage and stable combustion of the flame folding angle of the hearth strengthens combustion, biomass particles are quickly burnt out at uniform high temperature, simultaneously, a Z-shaped route is formed in a high-temperature flue gas flow through the action of the composite furnace arch and the flame folding angle at the upper part, the flue gas flow path is increased, the combustion time of the biomass in the hearth is prolonged, the biomass is fully combusted, meanwhile, the biomass particles entrained in the flue gas downwards slide down after colliding with the furnace arch under the action of inertia, the effect of separating the biomass particles which are not burnt out in the flue gas is preliminarily achieved, the cyclic combustion in the furnace is formed, and the burn-out rate is further improved. The structure is simple, and the manufacturing cost is low.
In conclusion, compared with the common chain biomass boiler or the common fluidized bed boiler, the biomass boiler has the advantages of good ignition state, wide fuel applicability, over 96 percent of burnout degree and environmental-friendly emission for technical applicability. The biomass boiler fuel of the angular tube fluidized bed has wide adaptability, can simultaneously burn various fuels, and can adapt to various bulk materials such as granular materials, massive materials, flaky materials, fine materials and the like; wide load regulation range, excellent environmental protection property, N0xAnd S02The emission is effectively controlled, the national emission standard is met, and meanwhile, a flue gas recirculation system can be added to meet the more strict local emission requirements; the heat storage in the furnace is high, the combustion is stable, the heat conduction is uniform, and the operation is stable and safe; the utilization of the ash is high.
Drawings
Fig. 1 is a schematic front view of the present invention.
Fig. 2 is a schematic side view of the present invention.
Fig. 3 is a schematic view of the feeding device of the present invention.
Fig. 4 is a schematic side view of the feeding device of the present invention.
Detailed Description
Referring to fig. 1 to 4, the utility model discloses a feeder 1, inlet pipe 2, isobaric plenum 3, fluidized bed 4, lower part furnace and pipe laying 5, secondary air pipe 6, pressure-bearing support pipeline 7, membrane wall 8, furnace wall and heat preservation 9, boiler drum 10, convection bank 11, flue gas guide plate 12, connecting flue 13, economizer 14, air heater 15, automatic ash discharging device 16.
A secondary air pipe 6 is distributed at the lower part of the vertical hearth, a fluidized bed 4 is arranged at the bottom, membrane type water cooling walls 8 are arranged at the periphery, a convection tube bundle 11 is arranged at the rear part, and a feeding device 1 is arranged below one side of the vertical hearth, so that for the convenience of expression, the side where the feeding device 1 is located is set as the front part of the hearth; an isobaric air chamber 3 is arranged below the fluidized bed 4, and a connecting flue 13, an economizer 14 and an air preheater 15 are arranged at the outlet of the flue and are sequentially connected; the lower part of the convection bank 11 is provided with an automatic ash discharging device 16; a first composite furnace arch 18b is arranged on the inner wall above the combustion zone of the vertical furnace hearth, a second composite furnace arch 18a is arranged on the furnace hearth wall above the opposite surface of the first furnace arch, so that high-temperature flue gas flow of the combustion zone forms a Z-shaped route, and the horizontal included angle of the composite furnace arches 18a and 18b is 25-35 degrees; a flame folding angle 17 is arranged at a flue gas outlet of the hearth, and the horizontal included angle is 20-30 degrees; the feeding device 1 comprises a continuously variable transmission 103, the continuously variable transmission 103 is connected with a spiral blade shaft 101, the spiral blade shaft 101 is surrounded in a U-shaped shell 102, a hopper 105 is connected to the upper part of the U-shaped shell 102, the lower part of the U-shaped shell 102 is 55-65 degrees open, the pitch of a spiral blade 106 is 200-300 mm so as to adapt to a large block-shaped material, the gap between the lower part of the spiral blade 106 and the U-shaped shell 102 is 18-22mm, the gap between the upper part of the spiral blade 106 and the upper part of the U-shaped shell 102 is 75-85mm, a blade-free shaft with the diameter of 400-500 mm is arranged after a discharge port extends out of the spiral blade shaft 101, a feeding pipe 2 is arranged below the blade-free shaft, and the feeding pipe 2 feeds fuel into a hearth; a conical ash hopper 16d is arranged below the convection tube bundle 11, a pneumatic valve 16b is arranged at the bottom of the conical ash hopper 16d, a pulse ash loosening device 16c is arranged at the lower part of the conical ash hopper 16d, an ash level meter 16a is arranged at the upper part of the conical ash hopper 16d for preventing ash from overflowing, and the conical ash hopper 16d, the pulse ash loosening device 16c, the ash level meter 16a and the pneumatic valve 16b form an automatic ash discharging device 16. The non-spiral blade shaft effectively solves the problem that the material at the discharge port is blocked by the blade.
The pressurized body of the boiler adopts a single-drum horizontal structure. The boiler body is mainly supported by a framework formed by pressure-bearing descending pipes. The furnace wall adopts a full-mode wall light furnace wall structure. The radiation heating surfaces around the hearth are all mode water-cooled walls, and the sealing performance is good. The convection heating surface arranged behind the hearth is a combined type convection tube bundle. An economizer and an air preheater are arranged at the tail part of the boiler. The boiler barrel, the membrane wall, the pipe burying system, the convection tube bundle, the economizer, the air preheater and the like are delivered from the factory through the components, so that the manufacturing quality is ensured, and the installation period is shortened. The parameters of the boiler series are 20 t/h-90 t/h.
Claims (1)
1. An angle tube fluidized bed biomass boiler is characterized in that a secondary air pipe (6) is distributed at the lower part of a vertical hearth, a fluidized bed (4) is arranged at the bottom, membrane type water cooling walls (8) are arranged around the fluidized bed, a convection tube bundle (11) is arranged at the rear part of the fluidized bed, and a feeding device (1) is arranged below the front part of the fluidized bed; an isobaric air chamber (3) is arranged below the fluidized bed (4), and a connecting flue (13), an economizer (14) and an air preheater (15) are connected in sequence at the outlet of the flue; the lower part of the convection bank (11) is provided with an automatic ash discharging device (16); a first composite furnace arch (18b) is arranged on the inner wall above the combustion zone of the vertical furnace hearth, a second composite furnace arch (18a) is arranged on the furnace hearth wall above the opposite surface of the first furnace arch, so that high-temperature flue gas flow in the combustion zone forms a Z-shaped route, and the horizontal included angle of the composite furnace arches (18a and 18b) is 25-35 degrees; a flame folding angle (17) is arranged at a flue gas outlet of the hearth, and the horizontal included angle is 20-30 degrees; the feeding device (1) comprises a continuously variable transmission (103), the continuously variable transmission (103) is connected with a spiral blade shaft (101), the spiral blade shaft (101) is enclosed in a U-shaped shell (102), a hopper (105) is connected to the upper part of the U-shaped shell (102), the lower part of the U-shaped shell (102) is opened at 55-65 degrees, the pitch of a spiral blade (106) is 200-300 mm, the gap between the lower part of the spiral blade (106) and the U-shaped shell (102) is 18-22mm, the gap between the upper part of the spiral blade (106) and the upper part of the U-shaped shell is 75-85mm, the spiral blade shaft (101) extends to a discharging port and is provided with a bladeless shaft of 400-500 mm, a feeding pipe (2) is arranged below the bladeless shaft, and the feeding pipe (2) feeds fuel into a hearth; a conical ash hopper (16d) is arranged below the convection tube bundle (11), a pneumatic valve (16b) is arranged at the bottom of the conical ash hopper (16d), a pulse ash loosening device (16c) is arranged at the lower part of the conical ash hopper, an ash level meter (16a) is arranged at the upper part of the conical ash hopper to prevent the ash from overflowing, and the conical ash hopper (16d), the pulse ash loosening device (16c), the ash level meter (16a) and the pneumatic valve (16b) form an automatic ash discharging device (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022803011.7U CN214891138U (en) | 2020-11-28 | 2020-11-28 | Corner tube fluidized bed biomass boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022803011.7U CN214891138U (en) | 2020-11-28 | 2020-11-28 | Corner tube fluidized bed biomass boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214891138U true CN214891138U (en) | 2021-11-26 |
Family
ID=78950910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022803011.7U Expired - Fee Related CN214891138U (en) | 2020-11-28 | 2020-11-28 | Corner tube fluidized bed biomass boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214891138U (en) |
-
2020
- 2020-11-28 CN CN202022803011.7U patent/CN214891138U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211126 |