CN107606608B - Biomass high-temperature ultrahigh-pressure circulating fluidized bed boiler flue ash removal system - Google Patents
Biomass high-temperature ultrahigh-pressure circulating fluidized bed boiler flue ash removal system Download PDFInfo
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- CN107606608B CN107606608B CN201710919380.2A CN201710919380A CN107606608B CN 107606608 B CN107606608 B CN 107606608B CN 201710919380 A CN201710919380 A CN 201710919380A CN 107606608 B CN107606608 B CN 107606608B
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- Prior art keywords
- smoke extraction
- channel
- fluidized bed
- baffle plate
- circulating fluidized
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- 239000002028 Biomass Substances 0.000 title claims abstract description 15
- 239000010881 fly ash Substances 0.000 title claims description 10
- 239000000779 smoke Substances 0.000 claims abstract description 54
- 238000000605 extraction Methods 0.000 claims abstract description 52
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003546 flue gas Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 239000002956 ash Substances 0.000 claims description 29
- 239000000428 dust Substances 0.000 claims description 9
- 238000009825 accumulation Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000007664 blowing Methods 0.000 abstract description 3
- 239000003500 flue dust Substances 0.000 abstract 1
- 230000008021 deposition Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000004071 soot Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
A flue dust removal system of a biomass high-temperature ultrahigh-pressure circulating fluidized bed boiler is characterized in that a flue gas eduction tube is arranged at the top of a separation material returning device and is connected with a tail flue; a baffle plate is arranged in the middle of the smoke extraction pipe, the baffle plate divides the smoke extraction pipe into a first smoke extraction channel and a second smoke extraction channel, and an ash remover is arranged in the first smoke extraction channel or the second smoke extraction channel; the front end of the smoke extraction pipe is provided with a channel switch, and when one of the first smoke extraction channel and the second smoke extraction channel is opened, the other channel is closed by the channel switch. The system has reasonable design, divides the pipeline in the smoke extraction pipe into two different smoke extraction channels, and arranges the ash remover in one channel, thereby removing the deposited ash blown off during the ash blowing of the circulating fluidized bed boiler in the flue channel, and greatly reducing the ash throughput of each heating surface at the downstream.
Description
Technical field:
the invention relates to a flue ash removal system of a biomass high-temperature ultrahigh-pressure circulating fluidized bed boiler.
The background technology is as follows:
the circulating fluidized bed boiler using biomass as fuel has the advantage that the biomass fuel is rich in alkaline metal elements such as potassium and sodium and chlorine, so that ash generated after biomass combustion is extremely easy to generate high-temperature corrosion. In the prior art, each stage of heating surface of the biomass boiler is arranged in a vertical flue, and only an ash bucket is arranged at a flue gas outlet. When the boiler operates, the large-block bonding deposited ash blown by the soot blower passes through the flue to reach the ash bucket at the flue gas outlet, so that the deposited ash of the hearth and the flue sequentially passes through each heating surface, the heating surfaces are greatly worn, and serious deposited ash is easy to appear at the heating surfaces, so that the heat transfer efficiency is greatly reduced. The prior art does not address this.
The invention comprises the following steps:
the invention provides a biomass high-temperature ultrahigh-pressure circulating fluidized bed boiler flue ash removal system for overcoming the defects of the prior art, which is reasonable in system design, can greatly reduce accumulated ash and solves the problems in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a flue ash removal system of a biomass high-temperature ultrahigh-pressure circulating fluidized bed boiler comprises a circulating fluidized bed hearth and a separation material returning device, wherein a flue gas eduction tube is arranged at the top of the separation material returning device and is connected with a tail flue; a baffle plate is arranged in the middle of the smoke extraction pipe, the baffle plate divides the smoke extraction pipe into a first smoke extraction channel and a second smoke extraction channel, an ash remover is arranged in the first smoke extraction channel or the second smoke extraction channel, and a second dust hopper is correspondingly arranged outside the first smoke extraction channel or the second smoke extraction channel where the ash remover is positioned; the front end of the smoke extraction pipe is provided with a channel switch, and when one of the first smoke extraction channel and the second smoke extraction channel is opened, the other channel is closed by the channel switch.
Preferably, the channel switch is a baffle plate, the baffle plate is connected with one side of the separator close to the separation material returning device through a rotating shaft, and the rotating shaft is connected with a power output end of a motor.
Preferably, the channel switch is a baffle, and a plurality of lifting rods for lifting the baffle are arranged on the baffle and are connected with the output end of the motor.
Preferably, the lifting rod is provided with threads, the output end of the motor is provided with a worm wheel, and the worm wheel is meshed with the lifting rod.
Preferably, the superheater, the reheater, the economizer, the air preheater and the dust remover are arranged in sequence along the flue gas flow direction in the tail flue.
Preferably, a first dust accumulation hopper is arranged at the bottom of the tail flue.
By adopting the scheme, the system is reasonable in design, a pipeline in the smoke extraction pipe is divided into two different smoke extraction channels, and the ash remover is arranged in one channel, so that accumulated ash blown down during soot blowing of the circulating fluidized bed boiler is removed in the flue channel, the ash throughput of each heating surface at the downstream is greatly reduced, the downstream ash accumulation degree is reduced, the abrasion is reduced, the heat exchange efficiency is improved, and the aim of saving energy is fulfilled; and when the production is normal, the flue is switched back to another flue, so that the resistance of the flue gas flow is reduced, and the production efficiency is improved.
Description of the drawings:
fig. 1 is a schematic view of a channel switch of the type provided with a rotary shaft according to the present invention.
Fig. 2 is a schematic view of a channel switch of the type provided with a lifting lever according to the invention.
FIG. 3 is a schematic view of a portion of a lifter bar provided with two lifter bar systems.
In the figure, 1, a circulating fluidized bed furnace, 2, a separation material returning device, 3, a tail flue, 4, a partition plate, 5, a first smoke extraction channel, 6, a second smoke extraction channel, 7, an ash remover, 8, a baffle plate, 9, a rotating shaft, 10, a motor, 11, a lifting rod, 12, a superheater, 13, a reheater, 14, an economizer, 15, an air preheater, 16, a dust remover, 17, a first ash deposition hopper, 18, a second ash deposition hopper, 19 and a worm gear.
The specific embodiment is as follows:
in order to clearly illustrate the technical features of the present solution, the present invention will be described in detail below with reference to the following detailed description and the accompanying drawings.
As shown in fig. 1-3, a flue ash removal system of a biomass high-temperature ultrahigh-pressure circulating fluidized bed boiler comprises a circulating fluidized bed hearth 1 and a separation material returning device 2, wherein a flue gas eduction tube is arranged at the top of the separation material returning device 2 and is connected with a tail flue 3; a baffle plate 4 is arranged in the middle of the smoke extraction pipe, the baffle plate 4 divides the smoke extraction pipe into a first smoke extraction channel 5 and a second smoke extraction channel 6, an ash remover 7 is arranged in the first smoke extraction channel 5 or the second smoke extraction channel 6, and a second first ash deposition hopper is correspondingly arranged outside the first smoke extraction channel 5 or the second smoke extraction channel 6 where the ash remover 7 is positioned; the front end of the smoke extraction pipe is provided with a channel switch, and when one of the first smoke extraction channel 5 and the second smoke extraction channel 6 is opened, the other channel is closed by the channel switch. The mode of alternately switching the first smoke extraction channel 5 and the second smoke extraction channel 6 is adopted, so that dangerous working conditions such as complete sealing of the smoke channels can be avoided, and the safety performance of the whole system is improved.
The channel switch is a baffle plate 8, the baffle plate 8 is connected with one side of the partition plate 4 adjacent to the separation material returning device 2 through a rotating shaft 9, and the rotating shaft 9 is connected with a power output end of a motor 10.
The channel switch is a baffle plate 8, a plurality of lifting rods 11 for lifting the baffle plate 8 are arranged on the baffle plate 8, and the lifting rods 11 are connected with the output end of a motor 10.
The lifting rod 11 is provided with threads, the output end of the motor 10 is provided with a worm wheel 19, and the worm wheel is meshed with the lifting rod 11. Regardless of the form employed, grooves may be provided in the flue at positions corresponding to the baffles 8 to improve sealing performance and prevent positional displacement of the baffles 8. There are many other ways to set the linkage switch, such as using an automatic control way to control the switches set on the first smoke extraction channel 5 and the second smoke extraction channel 6.
A superheater 12, a reheater 13, an economizer 14, an air preheater 15 and a dust remover 16 are arranged in the tail flue 3 in sequence along the flue gas flow direction.
A first dust hopper 17 is arranged at the bottom of the tail flue 3. For the cumulative removal of ash deposits in the afterburner 3.
When the circulating fluidized bed furnace is used, flue gas generated by the circulating fluidized bed furnace 1 and carried particles enter the separation material returning device 2, most of the particles are separated and returned to the circulating fluidized bed furnace 1, the flue gas enters the flue gas eduction tube, under the condition that the particles in the flue gas are more in the soot blowing or other flue gas eduction tubes, the flue gas is introduced into the first flue gas eduction channel 5 or the second flue gas eduction channel 6 containing the ash remover 7, the accumulated ash in the ash remover 7 is discharged through an ash hopper of the ash remover, and then the purified flue gas enters the tail flue 3 to exchange heat with the superheater 12, the reheater 13, the economizer 14 and the air preheater 15; if the flue gas is purer, or when the ash remover 7 in the flue gas channel discharges ash for overhauling, the flue gas is introduced into another channel and then enters the tail flue 3 to complete heat exchange with the superheater 12, the reheater 13, the economizer 14 and the air preheater 15.
The above embodiments are not to be taken as limiting the scope of the invention, and any alternatives or modifications to the embodiments of the invention will be apparent to those skilled in the art and fall within the scope of the invention.
The present invention is not described in detail in the present application, and is well known to those skilled in the art.
Claims (4)
1. A biomass high-temperature ultrahigh-pressure circulating fluidized bed boiler flue ash removal system is characterized in that: the device comprises a circulating fluidized bed hearth and a separation material returning device, wherein a smoke eduction tube is arranged at the top of the separation material returning device and is connected with a tail flue; a baffle plate is arranged in the middle of the smoke extraction pipe, the baffle plate divides the smoke extraction pipe into a first smoke extraction channel and a second smoke extraction channel, an ash remover is arranged in the first smoke extraction channel or the second smoke extraction channel, and a second dust hopper is correspondingly arranged outside the first smoke extraction channel or the second smoke extraction channel where the ash remover is positioned; a channel switch is arranged at the front end of the smoke extraction pipe, and the channel switch enables one of the first smoke extraction channel and the second smoke extraction channel to be closed when the other channel is opened;
The channel switch is a baffle plate, a plurality of lifting rods for lifting the baffle plate are arranged on the baffle plate, and the lifting rods are connected with the output end of the motor; and a superheater, a reheater, an economizer, an air preheater and a dust remover are sequentially arranged in the tail flue along the flue gas flow direction.
2. The biomass high-temperature ultrahigh-pressure circulating fluidized bed boiler flue ash removal system according to claim 1, wherein: the channel switch is a baffle plate, the baffle plate is connected with one side of the separator close to the separation material returning device through a rotating shaft, and the rotating shaft is connected with a power output end of a motor.
3. The biomass high-temperature ultrahigh-pressure circulating fluidized bed boiler flue ash removal system according to claim 2, wherein: the lifting rod is provided with threads, the output end of the motor is provided with a worm gear, and the worm gear is meshed with the lifting rod.
4. A biomass high temperature ultra high pressure circulating fluidized bed boiler flue ash removal system as defined in claim 3, wherein: the bottom of the tail flue is provided with a first dust accumulation hopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710919380.2A CN107606608B (en) | 2017-09-30 | 2017-09-30 | Biomass high-temperature ultrahigh-pressure circulating fluidized bed boiler flue ash removal system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710919380.2A CN107606608B (en) | 2017-09-30 | 2017-09-30 | Biomass high-temperature ultrahigh-pressure circulating fluidized bed boiler flue ash removal system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107606608A CN107606608A (en) | 2018-01-19 |
| CN107606608B true CN107606608B (en) | 2024-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710919380.2A Active CN107606608B (en) | 2017-09-30 | 2017-09-30 | Biomass high-temperature ultrahigh-pressure circulating fluidized bed boiler flue ash removal system |
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| Country | Link |
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| CN (1) | CN107606608B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201014473Y (en) * | 2007-01-16 | 2008-01-30 | 谢国平 | Dust removing apparatus |
| CN102230617A (en) * | 2011-06-22 | 2011-11-02 | 王全红 | Coal-fired gasification mechanical combustion boiler |
| CN206478633U (en) * | 2017-02-22 | 2017-09-08 | 济南锅炉集团有限公司 | Biomass-burning super-pressure reheat vapor cycle fluidized-bed combustion boiler |
| CN207298916U (en) * | 2017-09-30 | 2018-05-01 | 山东琦泉能源科技有限公司 | A kind of biomass high-temperature super-pressure circulating fluidized bed boiler flue ash disposal system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2735560B1 (en) * | 1995-06-16 | 1997-07-11 | Gec Alsthom Stein Ind | METHOD AND DEVICE FOR REDUCING THE EMISSIONS OF POLLUTANTS IN THE SMOKE OF A FLUIDIZED BED HEATER BY STAGING FUEL INJECTIONS |
| CN201344522Y (en) * | 2008-11-27 | 2009-11-11 | 武汉凯迪电力工程有限公司 | Combustion-use biomass multi-channel circulating fluidized bed boiler |
| CN102777895B (en) * | 2012-07-24 | 2015-03-04 | 武汉和信益科技有限公司 | Semi-tower type medium-temperature separation biomass circulating fluidized bed boiler |
| CN102913891A (en) * | 2012-10-18 | 2013-02-06 | 清华大学 | Boiler flue structure |
| CN203364148U (en) * | 2013-04-19 | 2013-12-25 | 中工国际工程股份有限公司 | Biomass boiler with own first-class multi-pipe cyclone dust removal devices and rear smoke channel thereof |
| DE102015203244A1 (en) * | 2015-02-24 | 2016-08-25 | Steinmüller Babcock Environment Gmbh | Mehrzugkessel |
-
2017
- 2017-09-30 CN CN201710919380.2A patent/CN107606608B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201014473Y (en) * | 2007-01-16 | 2008-01-30 | 谢国平 | Dust removing apparatus |
| CN102230617A (en) * | 2011-06-22 | 2011-11-02 | 王全红 | Coal-fired gasification mechanical combustion boiler |
| CN206478633U (en) * | 2017-02-22 | 2017-09-08 | 济南锅炉集团有限公司 | Biomass-burning super-pressure reheat vapor cycle fluidized-bed combustion boiler |
| CN207298916U (en) * | 2017-09-30 | 2018-05-01 | 山东琦泉能源科技有限公司 | A kind of biomass high-temperature super-pressure circulating fluidized bed boiler flue ash disposal system |
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| CN107606608A (en) | 2018-01-19 |
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Effective date of registration: 20240518 Address after: No. 46, Guihua Individual, Xizi Community, Hetang District, Zhuzhou City, Hunan Province, 412000 Applicant after: Liu Wei Country or region after: China Address before: 1-1901, 19th Floor, Building 4, Huachuang Guanli Center, No. 219 Shunhai Road, High tech Zone, Jinan City, Shandong Province, 250000 Applicant before: SHANDONG QIQUAN ENERGY TECHNOLOGY Co.,Ltd. Country or region before: China |
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