CN112178629A - Tail shaft flue separation device and multi-process circulating fluidized bed - Google Patents
Tail shaft flue separation device and multi-process circulating fluidized bed Download PDFInfo
- Publication number
- CN112178629A CN112178629A CN202011197565.5A CN202011197565A CN112178629A CN 112178629 A CN112178629 A CN 112178629A CN 202011197565 A CN202011197565 A CN 202011197565A CN 112178629 A CN112178629 A CN 112178629A
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- CN
- China
- Prior art keywords
- vertical shaft
- flue
- flue gas
- tail vertical
- heat exchanger
- 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.)
- Pending
Links
- 238000000926 separation method Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000002485 combustion reaction Methods 0.000 claims abstract description 40
- 239000003546 flue gas Substances 0.000 claims abstract description 36
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000002956 ash Substances 0.000 abstract description 22
- 239000010881 fly ash Substances 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract 1
- 239000000779 smoke Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011044 inertial separation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
- F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
- F23C10/08—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases
- F23C10/10—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases the separation apparatus being located outside the combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
Abstract
The invention discloses a tail vertical shaft flue separation device and a multi-process circulating fluidized bed, which comprise a first combustion chamber, a second combustion chamber, a third combustion chamber and a tail vertical shaft flue which are horizontally arranged in parallel and sequentially connected to form an M-shaped baffled material flow channel, wherein a flue gas outlet channel is arranged on one side of the lower part of the tail vertical shaft flue. The tail vertical shaft flue is internally provided with more than two stages of heat exchangers at least comprising a first stage heat exchanger and a last stage heat exchanger along the flue gas flow direction, and a flow guide bulge structure formed by a flow guide plate is arranged behind each stage of heat exchanger and is arranged on the inner wall surface of the tail vertical shaft flue. An ash bucket with one side inclined is arranged at the bottom of the tail shaft flue, and a baffle device is arranged between the final-stage heat exchanger and the flue gas outlet channel and comprises a baffle plate arranged at the inlet side of the flue gas outlet channel and a shutter type plate groove arranged at the inclined side of the ash bucket. So that a return type material separation channel is formed in the ash hopper. The invention has the advantages of compact structure, fly ash heat recovery, dense-phase zone temperature regulation and control and the like.
Description
Technical Field
The invention relates to a tail vertical shaft flue separation device and a multi-process circulating fluidized bed, and belongs to the technical field of combustion.
Background
The multi-flow circulating fluidized bed has a return type material flow channel, and two-stage material circulation is adopted, so that the circulating bed is miniaturized, and the advantages of high combustion efficiency, high thermal efficiency, low initial discharge and the like of the circulating bed are kept. The first-stage material circulation of the multi-process circulating fluidized bed is usually inertial separation, and the second stage adopts a cyclone separator. The secondary separator often has the problems of complex structure, large pressure loss and the like. Therefore, it is necessary to develop a simpler feeding back device.
Disclosure of Invention
The invention aims to provide a multi-process circulating fluidized bed taking a tail vertical shaft flue as a secondary separation device.
The invention is realized by the following technical scheme:
a tail vertical shaft flue separation device comprises a tail vertical shaft flue and an ash bucket at the bottom of the tail vertical shaft flue, wherein a flue gas inlet channel is arranged at the upper part of the tail vertical shaft channel, and a flue gas outlet channel is arranged at one side of the lower part of the tail vertical shaft channel; the flue gas outlet channel is arranged at the top end of the ash hopper; more than two stages of heat exchangers at least comprising a first stage heat exchanger and a last stage heat exchanger are arranged in the tail vertical shaft flue along the flow direction of the flue gas, a flow guide bulge structure is arranged behind each stage of heat exchanger, the flow guide bulge structure is arranged on the inner wall surface of the tail vertical shaft flue, and the flow velocity of the flue gas is gradually reduced to 5-7 m/s from 10-12 m/s; and a deflection device is arranged between the final-stage heat exchanger and the flue gas outlet channel, so that a back-turning type material separation channel is formed in the ash bucket, and the deflection device comprises a deflection plate arranged on the inlet side of the flue gas outlet channel and a shutter type plate groove arranged on the inclined side of the ash bucket.
A multi-flow circulating fluidized bed comprises a first combustion chamber, a second combustion chamber, a third combustion chamber and a tail vertical shaft flue which are horizontally arranged in parallel and sequentially connected to form an M-shaped baffling type material flow channel, wherein a smoke outlet channel is arranged on one side of the lower portion of the tail vertical shaft flue. The bottom of the second combustion chamber and the bottom of the third combustion chamber incline oppositely to form an inertia separation channel, and a primary feed back device is arranged at the bottom of the inertia separation channel and connected with the lower part of the first combustion chamber; more than two stages of heat exchangers at least comprising a first stage heat exchanger and a last stage heat exchanger are arranged in the tail vertical shaft flue along the flow direction of flue gas, a flow guide bulge structure is arranged behind each stage of heat exchanger, and the flow guide bulge structure is arranged on the inner wall surface of the tail vertical shaft flue; the bottom of the tail vertical shaft flue is provided with at least one side-inclined ash bucket, and the flue gas outlet channel is arranged at the top end of the ash bucket; a deflection device is arranged between the final-stage heat exchanger and the flue gas outlet channel, so that a secondary material separation channel is formed in the ash bucket, and the deflection device comprises a deflection plate arranged on the inlet side of the flue gas outlet channel and a shutter type plate groove arranged on the inclined side of the ash bucket; the bottom of the ash bucket is provided with a pneumatic conveying device which is connected with the lower part of a combustion chamber.
In the technical scheme, the flow guide bulge structures are arranged more than two stages corresponding to the heat exchanger along the smoke flowing direction, the upper and lower flow guide bulge structures are oppositely arranged on the inner wall surface of the tail vertical shaft flue, and the smoke flowing speed is gradually reduced to 5-7 m/s from 10-12 m/s.
In the above technical scheme, the flow guide protrusion structure is composed of a flow guide plate.
The invention has the following advantages and beneficial effects: the structure is compact; the fly ash heat can be recovered, the bag burning risk of the cloth bag is reduced, and particularly when biomass fuel is burned; the low-temperature ash is sent back to the first combustion chamber, which is beneficial to controlling the temperature of the dense-phase region, thereby reducing the initial emission of NOx.
Drawings
FIG. 1 is a schematic view of a multi-pass circulating fluidized bed according to the present invention.
In the figure: 1-a combustion chamber; 2-a second combustion chamber; 3-three combustion chambers; 4-inertial separation channel; 5-tail shaft flue; 6-overflow feed back device; 7-flue gas outlet channel; 8-flow guiding convex structure; 9-baffle plate; 10-ash bucket; 11-louvered plate slots; 12-pneumatic conveying means; 13-primary feed back device.
Detailed Description
The following describes the embodiments and operation of the present invention with reference to the accompanying drawings.
The terms of orientation such as up, down, left, right, front, and rear in the present specification are established based on the positional relationship shown in the drawings. The corresponding positional relationship may also vary depending on the drawings, and therefore, should not be construed as limiting the scope of protection.
As shown in fig. 1, the multi-flow circulating fluidized bed comprises a first combustion chamber 1, a second combustion chamber 2, a third combustion chamber 3 and a tail vertical shaft flue 5 which are horizontally arranged in parallel and are sequentially connected to form an M-shaped baffled material flow channel. The first combustion chamber 1 is provided with a feeding device, the bottom of the first combustion chamber 1 is provided with a primary air distribution device, and the first combustion chamber and the second combustion chamber are also provided with a secondary air distribution device and even a tertiary air distribution device as required. The top of the first combustion chamber 1 is communicated with the top of the second combustion chamber 2, and the bottom of the second combustion chamber 2 and the bottom of the third combustion chamber 3 are inclined oppositely to form a return type inertia separation channel 4. The bottom of the inertia separation channel 4 is provided with a primary feed back device 13 which is connected with the lower part of a combustion chamber 1 and can feed back the separated solid materials to the lower part of the combustion chamber 1 to participate in circulation. The top of the three combustion chambers 3 is communicated with a tail vertical shaft flue 5. A smoke outlet channel 7 is arranged on one side of the lower part of the tail vertical shaft flue 5.
The tail vertical shaft flue 5 is internally provided with more than two stages of heat exchangers 6 at least comprising a first stage heat exchanger and a last stage heat exchanger along the flow direction of flue gas, a flow guide bulge structure 8 which is usually a triangular cone structure and is formed by a flow guide plate is arranged behind each stage of heat exchanger and arranged on the inner wall surface of the tail vertical shaft flue, and the flow velocity of the flue gas is gradually reduced to 5-7 m/s from 10-12 m/s.
As a preferred scheme, the flow guide bulge structures 8 are correspondingly arranged at more than two levels along the smoke flowing direction and the heat exchanger, and the upper and lower flow guide bulge structures are oppositely arranged on the inner wall surface of the tail vertical shaft flue.
An ash bucket 10 is arranged at the bottom of the tail vertical shaft flue 5, and at least one side of the ash bucket 10 inclines. The flue gas outlet channel 7 is arranged at the top end of the ash hopper 10. A baffle device is arranged between the final-stage heat exchanger and the flue gas outlet channel, and comprises a baffle plate 9 arranged at the inlet side of the flue gas outlet channel 7 and a shutter type plate groove 11 arranged at the inclined side of an ash bucket, so that a return type material flow channel is formed in the ash bucket 10, and a secondary material separation device of the multi-process circulating fluidized bed is also formed. The bottom of the ash bucket 10 is provided with a pneumatic conveying device 12 which is connected with a combustion chamber 1 and can send the fly ash back to the combustion chamber 1. And the low-temperature ash is returned to the first combustion chamber, so that the temperature of the dense-phase zone can be adjusted and controlled, and the initial emission of NOx can be reduced.
The structure in the tail vertical shaft flue 5 and the arrangement of the ash bucket 10 also form a tail vertical shaft flue separation device, and the tail vertical shaft flue separation device can also be applied to material separation and returning of other circulating fluidized beds.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The tail vertical shaft flue separation device is characterized by comprising a tail vertical shaft flue (5) and an ash bucket (10) at the bottom of the tail vertical shaft flue, wherein a flue gas inlet channel is arranged at the upper part of the tail vertical shaft channel (5), and a flue gas outlet channel (7) is arranged at one side of the lower part of the tail vertical shaft channel; the flue gas outlet channel (7) is arranged at the top end of the ash hopper (10); more than two stages of heat exchangers (6) at least comprising a first stage heat exchanger and a last stage heat exchanger are arranged in the tail vertical shaft flue (5) along the flow direction of flue gas, a flow guide bulge structure (8) is arranged behind each stage of heat exchanger, the flow guide bulge structure is arranged on the inner wall surface of the tail vertical shaft flue, and the flow velocity of the flue gas is gradually reduced to 5-7 m/s from 10-12 m/s; and a baffle device is arranged between the final-stage heat exchanger and the flue gas outlet channel, so that a return type material separation channel is formed in the ash bucket (10), and the baffle device comprises a baffle plate (9) arranged on the inlet side of the flue gas outlet channel (7) and a shutter type plate groove (11) arranged on the inclined side of the ash bucket.
2. The tail vertical shaft flue separation device as claimed in claim 1, wherein the flow guide protrusion structures (8) are arranged in more than two stages corresponding to the heat exchanger along the flue gas flow direction, and the upper and lower flow guide protrusion structures are oppositely arranged on the inner wall surface of the tail vertical shaft flue.
3. The aft shaft flue separation device of claim 1 wherein the deflector ledge structure (8) is comprised of a deflector plate.
4. A multi-flow circulating fluidized bed is characterized by comprising a first combustion chamber (1), a second combustion chamber (2), a third combustion chamber (3) and a tail vertical shaft flue (5) which are horizontally arranged in parallel and are sequentially connected, wherein a flue gas outlet channel (7) is arranged on one side of the lower part of the tail vertical shaft flue (5); the bottom of the second combustion chamber (2) and the bottom of the third combustion chamber (3) incline oppositely to form an inertia separation channel (4), and a primary feed back device (13) is arranged at the bottom of the inertia separation channel (4) and connected with the lower part of the first combustion chamber (1); more than two stages of heat exchangers (6) at least comprising a first stage heat exchanger and a last stage heat exchanger are arranged in the tail vertical shaft flue (5) along the flow direction of flue gas, a flow guide bulge structure (8) is arranged behind each stage of heat exchanger, and the flow guide bulge structure is arranged on the inner wall surface of the tail vertical shaft flue; an ash hopper (10) is arranged at the bottom of the tail vertical shaft flue (5), and the flue gas outlet channel (7) is arranged at the top end of the ash hopper (10); a baffle device is arranged between the final-stage heat exchanger and the flue gas outlet channel, so that a back-turning type material separation channel is formed in the ash bucket (10), and the baffle device comprises a baffle plate (9) arranged at the inlet side of the flue gas outlet channel (7) and a shutter type plate groove (11) arranged at the inclined side of the ash bucket; the bottom of the ash bucket (10) is provided with a pneumatic conveying device (12) which is connected with a combustion chamber (1).
5. The multi-process circulating fluidized bed of claim 4, wherein the flow guide protrusion structures (8) are arranged at more than two stages corresponding to the heat exchanger along the flue gas flowing direction, the upper and lower flow guide protrusion structures are oppositely arranged on the inner wall surface of the tail vertical shaft flue, and the flue gas flowing speed is gradually reduced from 10-12 m/s to 5-7 m/s.
6. A multi-pass circulating fluidized bed according to claim 4, characterized in that the flow-guiding projection structures (8) are constituted by flow-guiding plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011197565.5A CN112178629A (en) | 2020-10-30 | 2020-10-30 | Tail shaft flue separation device and multi-process circulating fluidized bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011197565.5A CN112178629A (en) | 2020-10-30 | 2020-10-30 | Tail shaft flue separation device and multi-process circulating fluidized bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112178629A true CN112178629A (en) | 2021-01-05 |
Family
ID=73917510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011197565.5A Pending CN112178629A (en) | 2020-10-30 | 2020-10-30 | Tail shaft flue separation device and multi-process circulating fluidized bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112178629A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113375165A (en) * | 2021-06-04 | 2021-09-10 | 北京基亚特环保科技有限公司 | Vertical secondary combustion chamber device |
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|---|---|---|---|---|
| CN101749696A (en) * | 2010-02-09 | 2010-06-23 | 清华大学 | Multipath circulating fluidized bed boiler |
| CN101788151A (en) * | 2010-02-09 | 2010-07-28 | 清华大学 | Large-scale garbage incinerator |
| WO2010116039A1 (en) * | 2009-04-09 | 2010-10-14 | Foster Wheeler Energia Oy | A circulating fluidized bed boiler |
| CN104607043A (en) * | 2015-01-19 | 2015-05-13 | 大唐科技产业集团有限公司 | Novel flow guide device for preventing catalyst in combined-wall denitrification reactor from abrasion |
| WO2015124007A1 (en) * | 2014-02-19 | 2015-08-27 | 王森 | Fluidized bed boiler with integration of multifunctional inertial gravity separators and multiple types of furnaces |
| CN205886414U (en) * | 2016-08-20 | 2017-01-18 | 哈尔滨锅炉厂有限责任公司 | A flue gas ash handling equipment for horizontal gas pass |
| CN210448375U (en) * | 2019-05-16 | 2020-05-05 | 中国神华能源股份有限公司 | Dust removal device of coal economizer |
-
2020
- 2020-10-30 CN CN202011197565.5A patent/CN112178629A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010116039A1 (en) * | 2009-04-09 | 2010-10-14 | Foster Wheeler Energia Oy | A circulating fluidized bed boiler |
| CN101749696A (en) * | 2010-02-09 | 2010-06-23 | 清华大学 | Multipath circulating fluidized bed boiler |
| CN101788151A (en) * | 2010-02-09 | 2010-07-28 | 清华大学 | Large-scale garbage incinerator |
| WO2015124007A1 (en) * | 2014-02-19 | 2015-08-27 | 王森 | Fluidized bed boiler with integration of multifunctional inertial gravity separators and multiple types of furnaces |
| CN104607043A (en) * | 2015-01-19 | 2015-05-13 | 大唐科技产业集团有限公司 | Novel flow guide device for preventing catalyst in combined-wall denitrification reactor from abrasion |
| CN205886414U (en) * | 2016-08-20 | 2017-01-18 | 哈尔滨锅炉厂有限责任公司 | A flue gas ash handling equipment for horizontal gas pass |
| CN210448375U (en) * | 2019-05-16 | 2020-05-05 | 中国神华能源股份有限公司 | Dust removal device of coal economizer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113375165A (en) * | 2021-06-04 | 2021-09-10 | 北京基亚特环保科技有限公司 | Vertical secondary combustion chamber device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 100085 3rd floor, edistar, No.79, Shuangqing Road, Haidian District, Beijing Applicant after: Beijing Rehua Energy Co.,Ltd. Address before: 100085 3rd floor, edistar, No.79, Shuangqing Road, Haidian District, Beijing Applicant before: BEIJING NOWVA ENERGY TECHNOLOGY Co.,Ltd. Address after: 100085 3rd floor, edistar, No.79, Shuangqing Road, Haidian District, Beijing Applicant after: Rehua Energy Co.,Ltd. Address before: 100085 3rd floor, edistar, No.79, Shuangqing Road, Haidian District, Beijing Applicant before: Beijing Rehua Energy Co.,Ltd. |
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| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210105 |
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| RJ01 | Rejection of invention patent application after publication |