CN108662578B - Feeding system of circulating fluidized bed boiler - Google Patents
Feeding system of circulating fluidized bed boiler Download PDFInfo
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- CN108662578B CN108662578B CN201810494424.6A CN201810494424A CN108662578B CN 108662578 B CN108662578 B CN 108662578B CN 201810494424 A CN201810494424 A CN 201810494424A CN 108662578 B CN108662578 B CN 108662578B
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- feeding
- conveying pipeline
- material conveying
- fluidized bed
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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
- F23C10/18—Details; Accessories
- F23C10/22—Fuel feeders specially adapted for fluidised bed combustion apparatus
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention discloses a feeding system of a circulating fluidized bed boiler, which is characterized in that a feeding hopper, a first feeding mechanism, a first conveying pipeline, a second feeding mechanism and a second conveying pipeline are communicated in sequence, grooved wheels in the first feeding mechanism and the second feeding mechanism drive materials to move towards a hearth, the second conveying pipeline is communicated with a discharge port of a second feeding shell, a first mechanical flap door is arranged at the discharge port of the second conveying pipeline, and the first mechanical flap door covers the discharge port of the second conveying pipeline to seal the discharge port of the second conveying pipeline when the feeding system of the circulating fluidized bed boiler is closed; according to the feeding system of the circulating fluidized bed boiler, the feeding hopper and the hearth are separated through the feeding grooved wheel, so that flame entering into the feeding hopper due to the backfire phenomenon of the boiler is avoided, meanwhile, the discharge port of the second conveying pipeline is sealed by the first mechanical turnover door cover on the discharge port of the second conveying pipeline, and the backfire phenomenon is avoided.
Description
Technical Field
The invention relates to the technical field of boiler devices, in particular to a feeding system of a circulating fluidized bed boiler.
Background
Generally, a traditional circulating fluidized bed boiler feeding hole has a problem that the hearth of a circulating fluidized bed boiler is in positive pressure and is easy to spray outwards, so that safety problems are easy to cause; the two methods have the defects of sealing, inconvenient maintenance, easy fire striking under the bin, and increased air guiding quantity to cause micro negative pressure of a hearth, thereby causing electric energy waste.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a feeding system of a circulating fluidized bed boiler.
The invention provides a feeding system of a circulating fluidized bed boiler, which comprises a feeding hopper, a first feeding mechanism, a first material conveying pipeline, a second feeding mechanism and a second material conveying pipeline, wherein the feeding hopper is arranged on the feeding hopper; the first feeding mechanism comprises a first feeding shell, a first feeding grooved wheel and a first motor, a feeding hole of the first feeding shell is communicated with the interior of the feeding hopper, the first feeding grooved wheel is rotatably arranged in the first feeding shell, and an output shaft of the first motor is connected with the first feeding grooved wheel and used for driving the first feeding grooved wheel to rotate; the second feeding mechanism is positioned below the first feeding mechanism and comprises a second feeding shell, a second feeding grooved wheel and a second motor, a feeding hole of the second feeding shell is communicated with a discharging hole of the first feeding shell through a first conveying pipeline, the second feeding grooved wheel is rotatably installed in the second feeding shell, and an output shaft of the second motor is communicated with the second feeding grooved wheel to drive the second feeding grooved wheel to rotate; and the second material conveying pipeline is communicated with a discharge hole of the second feeding shell, a first mechanical turnover door is arranged at the discharge hole of the second material conveying pipeline, and the first mechanical turnover door covers the discharge hole of the second material conveying pipeline to seal the discharge hole of the second material conveying pipeline in a closed state of the feeding system of the circulating fluidized bed boiler.
Preferably, the first material conveying pipeline is arc-shaped, and the direction of a material inlet of the first material conveying pipeline and the direction of a material outlet of the first material conveying pipeline are positioned in the same plane and are vertically arranged.
Preferably, the aperture of the first feeding pipeline is gradually increased from the position close to the first feeding mechanism to the position close to the second feeding mechanism.
Preferably, a coal poking port is formed in the middle of the first conveying pipeline, and a cover plate is detachably mounted on the coal poking port.
Preferably, the aperture of the second material conveying pipeline is gradually reduced from the position close to the second material feeding device to the position far away from the second material feeding device
Preferably, a coal poking port is formed in the middle of the second conveying pipeline, and a cover plate is detachably mounted on the coal poking port.
Preferably, the device further comprises a fan, the second material conveying pipeline is provided with a plurality of tangential air inlets, and an air outlet of the fan is communicated with the tangential air inlets.
Preferably, an opening is formed in the side wall of the bottom of the first conveying pipeline, the second mechanical flap door is mounted on the first conveying pipeline through a torsion spring and used for sealing the opening, the second mechanical flap door is covered on the opening to keep the opening in a sealed state under the condition that no material flows or the material normally flows in the first conveying pipeline, and the second mechanical flap door is opened under the action of material expansion force under the condition that the material in the first conveying pipeline is blocked.
Preferably, the first motor speed is less than the second motor speed.
According to the feeding system of the circulating fluidized bed boiler, two feeding mechanisms are arranged between a feeding hopper and a boiler body, feeding grooved wheels are arranged inside the feeding mechanisms, materials are fed into a boiler hearth through the rotation of the feeding grooved wheels, the feeding hopper is separated from the hearth through the feeding grooved wheels, so that flame is prevented from entering the feeding hopper due to the fact that the boiler is tempered, meanwhile, a first mechanical flap door is arranged at a discharge port of a second conveying pipeline, the first mechanical flap door is opened under the pushing of the materials in the feeding state, the materials can smoothly enter the hearth, after feeding is stopped, the first mechanical flap door covers the discharge port of the second conveying pipeline to seal the discharge port of the second conveying pipeline, and the tempering phenomenon is further prevented.
Drawings
FIG. 1 is a schematic structural diagram of a feeding system of a circulating fluidized bed boiler according to the present invention;
fig. 2 is a schematic structural diagram of a second material conveying pipeline of a feeding system of a circulating fluidized bed boiler provided by the invention.
Detailed Description
As shown in fig. 1-2, fig. 1 is a schematic structural diagram of a feeding system of a circulating fluidized bed boiler according to the present invention, and fig. 2 is a schematic structural diagram of a second conveying pipeline of the feeding system of the circulating fluidized bed boiler according to the present invention.
Referring to fig. 1, the feeding system of the circulating fluidized bed boiler provided by the invention comprises a feeding hopper 1, a first feeding mechanism, a first conveying pipeline 2, a second feeding mechanism and a second conveying pipeline 3; the feeding hopper 1 is fixed above the first feeding mechanism, the first feeding mechanism comprises a first feeding shell 41, a first feeding grooved wheel and a first motor 42, a feeding port of the first feeding shell 41 is communicated with the inside of the feeding hopper 1, the first feeding grooved wheel is rotatably installed in the first feeding shell 41, an output shaft of the first motor 42 is connected with the first feeding grooved wheel and used for driving the first feeding grooved wheel to rotate, and the first feeding grooved wheel rotates to drive materials fed into the feeding hopper 1 to move downwards; the second feeding mechanism is positioned below the first feeding mechanism and comprises a second feeding shell 51, a second feeding sheave and a second motor 52, a feeding hole of the second feeding shell 51 is communicated with a discharging hole of the first feeding shell 41 through a first conveying pipeline 2, the second feeding sheave is rotatably installed in the second feeding shell 51, the axis of the first feeding sheave and the axis of the second feeding sheave are vertically arranged and positioned in the same plane, an output shaft of the second motor 52 is connected with the second feeding sheave and used for driving the second feeding sheave to rotate, and the second feeding sheave rotates to drive materials to move from the feeding hole of the second feeding shell 51 to the discharging hole of the second feeding shell 51; second conveying pipeline 3 and second feed casing 51 discharge gate intercommunication, second conveying pipeline 3 discharge gate department is equipped with first machinery and turns over door 6, and first machinery turns over door 6 and installs on second conveying pipeline 3 through the torsional spring, and under the inside state that does not have the material to carry of second conveying pipeline, first machinery turns over door 6 and relies on the elasticity pressure that the torsional spring produced to seal second conveying pipeline 3 discharge gate on second conveying pipeline 3 discharge gate.
In this embodiment, the first feed sheave and the second feed sheave of setting between feeder hopper 1 and furnace separate feeder hopper 1 and furnace, thereby avoided the boiler to take place the tempering phenomenon and lead to flame to scurry into feeder hopper 1 in, simultaneously, be equipped with first machinery at 3 discharge gate departments of second conveying pipeline and turn over door 6, first machinery is turned over door 6 and is opened under the promotion of material under the feed state, the material can get into furnace smoothly, after stopping the feed, first machinery is turned over door 6 and is covered and is sealed 3 discharge gates of second conveying pipeline on 3 discharge gates of second conveying pipeline, the emergence of tempering phenomenon has further been avoided.
The aperture of the first material conveying pipeline 2 is gradually increased from the position close to the first feeding mechanism to the position close to the second feeding mechanism, so that the material can be conveniently moved from the feed port of the first material conveying pipeline 2 to the discharge port of the first material conveying pipeline 2, and the material is prevented from being blocked in the first material conveying pipeline 2; the aperture of the second material conveying pipeline 3 is gradually reduced from the position close to the second feeding device to the position far away from the second feeding device, so that the material is compacted at the discharge hole of the second material conveying pipeline 3 to prevent backfire.
Coal poking openings are formed in the middle of the first material conveying pipeline 2 and the middle of the second material conveying pipeline 3, a cover plate 7 is detachably mounted on each coal poking opening, and after the materials inside the first material conveying pipeline 2 or the second material conveying pipeline 3 are blocked, the cover plate 7 can be opened to clean the inside of the first material conveying pipeline 2 or the second material conveying pipeline.
Still include fan 9, a plurality of tangential air intakes 31 have been seted up on second conveying pipeline 3, fan 9 air outlet and a plurality of tangential air intakes 31 intercommunication, the air current that fan 9 produced passes through tangential air intake 31 in proper order, 3 inside and the 3 discharge gates of second conveying pipeline, the material in the second conveying pipeline removes to second conveying pipeline 3 with the help of the air current that fan 9 produced, thereby prevent that the material from blockking up in second conveying pipeline is inside, the material is more abundant of back burning after the air current blows off simultaneously.
The opening is formed in the side wall of the bottom of the first conveying pipeline 2, the second mechanical flap door 8 is installed on the first conveying pipeline 2 through a torsional spring and used for sealing the opening, no material flows or the material normally flows in the first conveying pipeline 2, the second mechanical flap door 8 keeps the opening closed state on the opening through a torsional spring cover, the material cannot be exposed from the opening, after the first conveying pipeline 2 is blocked, the material in the first conveying pipeline 2 generates an expansion force on the second mechanical flap door 8, after the expansion force is larger than the acting force of the torsional spring, the material can push the second mechanical flap door 8 to rotate to enable the opening to be opened, the material is exposed from the opening, and the situation that the first feeding mechanism is damaged or the first conveying pipeline 2 is extruded and deformed or even cracks due to the fact that the material is blocked in the first conveying pipeline 2 is prevented.
In this embodiment, the rotation speed of the first motor 42 is smaller than that of the second motor 52, so that the material conveying speed at the outlet of the first conveying pipeline 2 is always larger than that at the inlet of the first conveying pipeline 2, and the material will not be stored in the first conveying pipeline, thereby preventing the first conveying pipeline 2 from being blocked.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A feeding system of a circulating fluidized bed boiler is characterized by comprising a feeding hopper (1), a first feeding mechanism, a first conveying pipeline (2), a second feeding mechanism and a second conveying pipeline (3); the first feeding mechanism comprises a first feeding shell (41), a first feeding grooved wheel and a first motor (42), a feeding hole of the first feeding shell (41) is communicated with the inside of the feeding hopper (1), the first feeding grooved wheel is rotatably installed in the first feeding shell (41), and an output shaft of the first motor (42) is connected with the first feeding grooved wheel and used for driving the first feeding grooved wheel to rotate; the second feeding mechanism is positioned below the first feeding mechanism and comprises a second feeding shell (51), a second feeding grooved wheel and a second motor (52), a feeding hole of the second feeding shell (51) is communicated with a discharging hole of the first feeding shell (41) through a first conveying pipeline (2), the second feeding grooved wheel is rotatably installed in the second feeding shell (51), and an output shaft of the second motor (52) is communicated with the second feeding grooved wheel to drive the second feeding grooved wheel to rotate; the second material conveying pipeline (3) is communicated with a material outlet of the second material supply shell (51), a first mechanical turnover door (6) is arranged at the material outlet of the second material conveying pipeline (3), and the first mechanical turnover door (6) covers the material outlet of the second material conveying pipeline (3) to seal the material outlet of the second material conveying pipeline (3) when the feeding system of the circulating fluidized bed boiler is closed; the aperture of the first material conveying pipeline (2) is gradually increased from one end close to the first feeding mechanism to one end close to the second feeding mechanism; the aperture of the second material conveying pipeline (3) is gradually reduced from one end close to the second feeding device to one end far away from the second feeding device, the first material conveying pipeline (2) is arc-shaped, and the direction of a material inlet of the first material conveying pipeline (2) and the direction of a material outlet of the first material conveying pipeline (2) are positioned in the same plane and are vertically arranged; the device is characterized by further comprising a fan (9), wherein the fan (9) is arranged on the second material conveying pipeline (3) and is positioned between the second feeding shell (51) and a discharge hole of the second material conveying pipeline (3); a plurality of tangential air inlets (31) are formed in the second material conveying pipeline (3), and an air outlet of the fan (9) is communicated with the plurality of tangential air inlets (31); the opening has been seted up on first conveying pipeline (2) bottom lateral wall, and second machinery turns over door (8) and installs through the torsional spring and be used for sealing the opening on first conveying pipeline (2), does not have material flow or under the material normal flow state in first conveying pipeline (2), and second machinery turns over door (8) lid and keeps opening closed state on the opening, and second machinery turns over door (8) and opens under the effect of material expansive force under the material jam state in first conveying pipeline (2).
2. The circulating fluidized bed boiler feeding system according to claim 1, wherein a coal poking port is formed in the middle of the first material conveying pipeline (2), and a cover plate (7) is detachably mounted on the coal poking port.
3. The circulating fluidized bed boiler feeding system according to claim 1, wherein the second material conveying pipeline (3) is provided with a coal poking port at the middle part, and a cover plate (7) is detachably arranged on the coal poking port.
4. A circulating fluidized bed boiler charging system according to claim 1, characterized in that the first motor (42) has a rotational speed which is lower than the rotational speed of the second motor (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810494424.6A CN108662578B (en) | 2018-05-22 | 2018-05-22 | Feeding system of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810494424.6A CN108662578B (en) | 2018-05-22 | 2018-05-22 | Feeding system of circulating fluidized bed boiler |
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| Publication Number | Publication Date |
|---|---|
| CN108662578A CN108662578A (en) | 2018-10-16 |
| CN108662578B true CN108662578B (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810494424.6A Active CN108662578B (en) | 2018-05-22 | 2018-05-22 | Feeding system of circulating fluidized bed boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113758238B (en) * | 2021-09-26 | 2023-06-23 | 辽宁宝来生物能源有限公司 | Petroleum coke calcination rotary kiln blanking structure |
Citations (6)
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|---|---|---|---|---|
| CN201539857U (en) * | 2009-10-21 | 2010-08-04 | 中国铝业股份有限公司 | Circulation fluid bed boiler coal-feeding tube anti-blocking device |
| CN202166052U (en) * | 2011-07-20 | 2012-03-14 | 太原锅炉集团有限公司 | Air distribution device for boiler coal supply system of recirculating fluidized bed |
| CN204648292U (en) * | 2015-05-20 | 2015-09-16 | 陈育方 | A kind of anti-backfire pay-off of biomass combustion boiler |
| CN204665325U (en) * | 2015-03-26 | 2015-09-23 | 湖北天合嘉康能源科技有限公司 | The backfire-proof material feeding device of Industrial Boiler biomass-burning fuel |
| CN204962835U (en) * | 2015-04-28 | 2016-01-13 | 武安市嘉恒节能科技有限公司 | Dual -purpose automatic feeding of biomass fuel stove |
| JP2016186395A (en) * | 2015-03-27 | 2016-10-27 | 住友重機械工業株式会社 | Conveying apparatus and gas back flow suppression method |
-
2018
- 2018-05-22 CN CN201810494424.6A patent/CN108662578B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201539857U (en) * | 2009-10-21 | 2010-08-04 | 中国铝业股份有限公司 | Circulation fluid bed boiler coal-feeding tube anti-blocking device |
| CN202166052U (en) * | 2011-07-20 | 2012-03-14 | 太原锅炉集团有限公司 | Air distribution device for boiler coal supply system of recirculating fluidized bed |
| CN204665325U (en) * | 2015-03-26 | 2015-09-23 | 湖北天合嘉康能源科技有限公司 | The backfire-proof material feeding device of Industrial Boiler biomass-burning fuel |
| JP2016186395A (en) * | 2015-03-27 | 2016-10-27 | 住友重機械工業株式会社 | Conveying apparatus and gas back flow suppression method |
| CN204962835U (en) * | 2015-04-28 | 2016-01-13 | 武安市嘉恒节能科技有限公司 | Dual -purpose automatic feeding of biomass fuel stove |
| CN204648292U (en) * | 2015-05-20 | 2015-09-16 | 陈育方 | A kind of anti-backfire pay-off of biomass combustion boiler |
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| CN108662578A (en) | 2018-10-16 |
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