CN112747310A - Automatic bed material adding system - Google Patents
Automatic bed material adding system Download PDFInfo
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- CN112747310A CN112747310A CN202011634758.2A CN202011634758A CN112747310A CN 112747310 A CN112747310 A CN 112747310A CN 202011634758 A CN202011634758 A CN 202011634758A CN 112747310 A CN112747310 A CN 112747310A
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- Prior art keywords
- pipe
- pipeline
- gas
- valve
- bed material
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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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- 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
- F23C10/28—Control devices specially adapted for fluidised bed, combustion apparatus
- F23C10/30—Control devices specially adapted for fluidised bed, combustion apparatus for controlling the level of the bed or the amount of material in the bed
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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 belongs to the technical field of circulating fluidized bed boilers, and particularly relates to an automatic bed material adding system which comprises a slag bin, a first boiler, a second boiler, a variable-frequency electric feeder, a vibrating screen, a buffer bin, a sending device and a conveying pipeline, wherein a discharge pipe is fixed at the bottom of the slag bin, the variable-frequency electric feeder is installed at the bottom of the discharge pipe, the vibrating screen is connected to the bottom of the variable-frequency electric feeder, the buffer bin is assembled at the bottom of the vibrating screen, the sending device is arranged below the buffer bin, one end of the gas pipeline is connected with a gas inlet pipe, the lower end of the gas inlet pipe is provided with a gas storage tank in a matched mode, one end of the gas storage tank is connected with an air compressor, one end, far away from the air compressor, of the gas storage tank is; the invention can meet the pressure difference to the maximum extent, ensure that the material enters the pipeline after being fully fluidized, and can not form instantaneous pressure relief, thereby reducing the fluidization effect.
Description
Technical Field
The invention relates to the technical field of circulating fluidized bed boilers, in particular to an automatic bed material adding system.
Background
Aiming at the existing circulating fluidized bed boiler, bed materials must be added before the boiler is started every time, the bed materials are sent to a boiler platform through a belt conveyor or a lifting ton bag originally, the bed materials are manually added into a boiler hearth and spread at the bottom of the boiler to form a bed material layer, and the boiler is started under ignition.
In order to solve the above problems, an automatic bed material adding system is proposed in the present application.
Disclosure of Invention
Objects of the invention
In order to solve the technical problems in the background art, the invention provides an automatic bed material adding system.
(II) technical scheme
In order to solve the problems, the invention provides a moving bed material adding system which comprises a slag bin, a first boiler, a second boiler, a variable-frequency electric feeder, a vibrating screen, a buffer bin, a sending device and a conveying pipeline, wherein a discharging pipe is fixed at the bottom of the slag bin, the variable-frequency electric feeder is installed at the bottom of the discharging pipe, the vibrating screen is connected to the bottom of the variable-frequency electric feeder, the buffer bin is assembled at the bottom of the vibrating screen, the sending device is arranged below the buffer bin, an expansion joint is installed between the sending device and the buffer bin, a swing feed valve is assembled at one end of the expansion joint, the conveying pipeline is connected to the bottom of the sending device, one end of the conveying pipeline is respectively connected with the inner walls of the first boiler and the second boiler, an ash-gas mixer is installed on the conveying pipeline, a gas pipeline is connected to the side wall of the conveying pipeline, the lower extreme cooperation of intake pipe is installed the gas holder, and the one end of gas holder is connected with the air compressor machine, and the one end that the air compressor machine was kept away from to the gas holder is connected with the intake pipe, be connected with first air supplement pipe between intake pipe and the ash gas blender, the intake pipe is connected with the second air supplement pipe with pipeline's lower extreme.
Preferably, the inner wall of the slag bin is provided with a dust exhaust pipeline, and the lower end of the dust exhaust pipeline is connected with one end of the buffer bin and one end of the sending device respectively.
Preferably, be connected with the third air supplement pipe between intake pipe and the sending device, first manual ball valve, first relief pressure valve, first pneumatic ball valve and first orifice plate are installed to the lower extreme of third air supplement pipe, first check valve and first manual butterfly valve are installed to the upper end of third air supplement pipe.
Preferably, one end of the second air supplementing pipe is provided with a second manual ball valve, a second pressure reducing valve, a second pneumatic ball valve and a second orifice plate.
Preferably, one end of the first air supplement pipe is provided with a third manual ball valve, a third pneumatic ball valve and a third throttle plate hole.
Preferably, a fourth manual ball valve, a fourth pneumatic ball valve and a fourth orifice are installed at one end of the gas pipeline.
Preferably, a plurality of second check valves are installed between the gas pipeline and the ash gas mixer at equal intervals.
Preferably, the upper end of the conveying pipeline is provided with a manual inserting plate door, and the left end of the vibrating screen is connected with a discharging pipe.
The technical scheme of the invention has the following beneficial technical effects:
the fluidized material-gas mixture enters the pipeline in the mixer through the suction inlet of the mixer, and the material-gas mixture enters the valve, so that the valve is little washed, the service life is greatly prolonged, and the suction inlet of the mixer is close to the fluidization disc, so that the pressure difference can be met to the maximum extent, the material is ensured to enter the pipeline after being sufficiently fluidized, instantaneous pressure relief cannot be formed, and the fluidization effect is reduced.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a slag bin; 2. a first boiler; 3. a second boiler; 4. a variable-frequency electric feeder; 5. vibrating screen; 6. a buffer bin; 7. oscillating the feed valve; 8. a transmitting device; 9. an expansion joint; 10. an ash gas mixer; 11. an air compressor; 12. a gas storage tank; 13. an air inlet pipe; 14. a gas conduit; 15. a first air supplement pipe; 16. a third air supplement pipe; 17. a second air supplement pipe; 18. a dust exhaust pipeline; 19. a discharge pipe; 20. a delivery conduit; .
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in figure 1, the moving bed material adding system provided by the invention comprises a slag bin 1, a first boiler 2, a second boiler 3, a variable-frequency electric feeder 4, a vibrating screen 5, a buffer bin 6, a sending device 8 and a conveying pipeline 20, wherein a discharge pipe 19 is fixed at the bottom of the slag bin 1, the variable-frequency electric feeder 4 is installed at the bottom of the discharge pipe 19, the vibrating screen 5 is connected at the bottom of the variable-frequency electric feeder 4, the buffer bin 6 is assembled at the bottom of the vibrating screen 5, the sending device 8 is arranged below the buffer bin 6, an expansion joint 9 is installed between the sending device 8 and the buffer bin 6, a swing feed valve 7 is assembled at one end of the expansion joint 9, the conveying pipeline 20 is connected at the bottom of the sending device 8, one end of the conveying pipeline 20 is respectively connected with the inner walls of the first boiler 2 and the second boiler 3, an ash-gas mixer 10 is installed on the conveying pipeline, be connected with gas pipeline 14 on pipeline 20's the lateral wall, gas pipeline 14's one end is connected with intake pipe 13, gas holder 12 is installed in the lower extreme cooperation of intake pipe 13, and gas holder 12's one end is connected with air compressor machine 11, and the one end that gas holder 12 kept away from air compressor machine 11 is connected with intake pipe 13, be connected with first air supplement pipe 15 between intake pipe 13 and the ash gas blender 10, intake pipe 13 is connected with second air supplement pipe 17 with pipeline 20's lower extreme.
In this embodiment, it should be noted that a dust exhaust pipe 18 is installed on the inner wall of the slag bin 1, and the lower end of the dust exhaust pipe 18 is connected to one end of the buffer bin 6 and one end of the sending device 8, respectively.
In this embodiment, a third air supplement pipe 16 is connected between the air inlet pipe 13 and the sending device 8, a first manual ball valve, a first pressure reducing valve, a first pneumatic ball valve and a first throttle orifice are installed at the lower end of the third air supplement pipe 16, and a first check valve and a first manual butterfly valve are installed at the upper end of the third air supplement pipe 16.
In this embodiment, it should be noted that a second manual ball valve, a second pressure reducing valve, a second pneumatic ball valve, and a second orifice plate are installed at one end of the second air supply pipe 17.
In this embodiment, it should be noted that one end of the first air supplement pipe 15 is equipped with a third manual ball valve, a third pneumatic ball valve and a third orifice.
In this embodiment, it should be noted that a fourth manual ball valve, a fourth pneumatic ball valve, and a fourth orifice are installed at one end of the gas pipe 14.
In this embodiment, it should be noted that a plurality of second check valves are installed between the gas pipe 14 and the ash mixer 10 at equal distances.
In this embodiment, it should be noted that a manual inserting plate door is installed at the upper end of the conveying pipeline 20, and a discharging pipe is connected to the left end of the vibrating screen 5.
In the scheme of the embodiment of the invention, the automatic bed material adding system is arranged at the bottom of a bed material bin or a slag warehouse, bed materials uniformly enter the vibrating screen 5 through the variable-frequency electric feeder 4, fine-particle bed materials enter the buffer bin 6, large-particle bed materials are screened out and separately transported away, the bed materials enter the sending device 8 and are conveyed to the inlet of a boiler through compressed air serving as a power air source, and a plurality of feeding points are generally adopted to ensure that the material layers are uniformly laid to the greatest extent.
The method is characterized in that:
the conveying process is special: firstly starting a vibrating screen 5, delaying 10-30S (adjustable), then starting a variable-frequency electric feeder 4, delaying 5-10S (adjustable), opening a swing feed valve 7, after a material level signal display and sending device 8 is in place, closing the swing feed valve 7, opening a fluidizing valve after a valve is closed in place for type 3S, opening an air inlet valve for ash and air mixing, after the pressure of the device 8 to be sent reaches a certain set value (adjustable), opening a discharge valve for conveying, adjusting an air replenishing valve at any time according to the conveying pressure of a pipeline in the conveying process, after the conveying pressure of the pipeline is higher than the certain set value (adjustable), opening compressed air by the air replenishing valve to enter the pipeline for blowing assistance, closing the air replenishing valve after the conveying pressure is lower than the certain set value (adjustable), closing the air replenishing valve when the conveying pressure is close to the empty pipe pressure of the pipeline after bed materials are slowly conveyed, closing the air inlet valve for 20-30S, Fluidizing valve, one delivery cycle ends.
Bed materials enter a screening machine through a variable frequency feeder to be screened for coarse and fine particles, and the purpose of adopting variable frequency is to adjust the total feeding amount
The conveying mode is different from other sending devices, and after the ash gas is fully mixed in a normal sending device, the discharge valve is opened, the material directly enters the pipeline through the valve, the erosion abrasion to the valve is serious, the sending device adopts a special ash-gas mixer 10 and a tower-type fluidization tray (not shown in the figure, positioned inside the sending device), after the ash and the gas are fully mixed, the material does not directly enter the interior of the valve but enters the inner pipeline of the mixer through the suction inlet of the mixer under the action of the internal and external differential pressure after the discharge valve is opened, the material and the gas mixture enter the valve, the valve is washed away for a short time, the service life is greatly prolonged, and the suction inlet of the mixer is close to the fluidization disc, so that the pressure difference can be met to the maximum extent, the material is ensured to enter a pipeline after being fully fluidized, the instantaneous pressure relief can not be formed, and the fluidization effect is reduced.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. An automatic bed material adding system comprises a slag bin (1), a first boiler (2), a second boiler (3), a variable-frequency electric feeder (4), a vibrating screen (5), a buffer bin (6), a sending device (8) and a conveying pipeline (20), and is characterized in that a discharge pipe (19) is fixed at the bottom of the slag bin (1), the variable-frequency electric feeder (4) is installed at the bottom of the discharge pipe (19), the vibrating screen (5) is connected to the bottom of the variable-frequency electric feeder (4), the buffer bin (6) is assembled at the bottom of the vibrating screen (5), the sending device (8) is arranged below the buffer bin (6), an expansion joint (9) is installed between the sending device (8) and the buffer bin (6), a swing feeding valve (7) is assembled at one end of the expansion joint (9), the conveying pipeline (20) is connected to the bottom of the sending device (8), the inner wall that the one end of pipeline (20) was connected with first boiler (2) and second boiler (3) respectively is connected, installs ash gas blender (10) on pipeline (20), be connected with gas pipeline (14) on the lateral wall of pipeline (20), the one end of gas pipeline (14) is connected with intake pipe (13), gas holder (12) are installed in the lower extreme cooperation of intake pipe (13), and the one end of gas holder (12) is connected with air compressor machine (11), and the one end that air compressor machine (11) were kept away from in gas holder (12) is connected with intake pipe (13), be connected with first air supplement pipe (15) between intake pipe (13) and ash gas blender (10), intake pipe (13) are connected with second air supplement pipe (17) with the lower extreme of pipeline (20).
2. The automatic bed material adding system according to claim 1, characterized in that a dust exhaust pipe (18) is installed on the inner wall of the slag bin (1), and the lower end of the dust exhaust pipe (18) is connected with one end of the buffer bin (6) and one end of the sending device (8) respectively.
3. The automatic bed material adding system of claim 1, wherein a third air supplementing pipe (16) is connected between the air inlet pipe (13) and the sending device (8), a first manual ball valve, a first pressure reducing valve, a first pneumatic ball valve and a first throttling orifice are installed at the lower end of the third air supplementing pipe (16), and a first check valve and a first manual butterfly valve are installed at the upper end of the third air supplementing pipe (16).
4. The automatic bed material adding system according to claim 1, wherein one end of the second air supplementing pipe (17) is provided with a second manual ball valve, a second pressure reducing valve, a second pneumatic ball valve and a second orifice plate.
5. Automatic bed material addition system according to claim 1, characterized in that one end of the first air supplement pipe (15) is fitted with a third manual ball valve, a third pneumatic ball valve and a third orifice.
6. The automatic bed material adding system according to claim 1, wherein one end of said gas pipe (14) is fitted with a fourth manual ball valve, a fourth pneumatic ball valve and a fourth orifice.
7. Automatic bed material addition system according to claim 1, characterized in that a plurality of second non-return valves are installed equidistantly between the gas pipe (14) and the ash mixer (10).
8. The automatic bed material adding system as claimed in claim 1, wherein the upper end of the conveying pipeline (20) is provided with a manual inserting plate door, and the left end of the vibrating screen (5) is connected with a discharging pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011634758.2A CN112747310A (en) | 2020-12-31 | 2020-12-31 | Automatic bed material adding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011634758.2A CN112747310A (en) | 2020-12-31 | 2020-12-31 | Automatic bed material adding system |
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| Publication Number | Publication Date |
|---|---|
| CN112747310A true CN112747310A (en) | 2021-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011634758.2A Pending CN112747310A (en) | 2020-12-31 | 2020-12-31 | Automatic bed material adding system |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8426130D0 (en) * | 1984-10-16 | 1984-11-21 | Coal Industry Patents Ltd | Pneumatic feeder systems |
| CN201203107Y (en) * | 2008-04-11 | 2009-03-04 | 镇江纽普兰气力输送有限公司 | Bed material adding system of circulating fluid bed boiler |
| CN204675383U (en) * | 2015-04-14 | 2015-09-30 | 中国华电工程(集团)有限公司 | A kind of adjustable air-transport system of exerting oneself |
| CN205606541U (en) * | 2016-05-09 | 2016-09-28 | 中国华电科工集团有限公司 | Circulating fluidized bed boiler bed material air conveying system |
| CN106090897A (en) * | 2016-06-13 | 2016-11-09 | 江苏润海能源科技有限公司 | Pneumatic type boiler bed add-on system |
| WO2017059955A1 (en) * | 2015-10-07 | 2017-04-13 | M-Tec Mathis Technik Gmbh | Method and conveyor device for conveying a medium |
| CN109552886A (en) * | 2018-12-07 | 2019-04-02 | 云南云天化石化有限公司 | Boiler plant pressurization bed material transportation system |
-
2020
- 2020-12-31 CN CN202011634758.2A patent/CN112747310A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8426130D0 (en) * | 1984-10-16 | 1984-11-21 | Coal Industry Patents Ltd | Pneumatic feeder systems |
| CN201203107Y (en) * | 2008-04-11 | 2009-03-04 | 镇江纽普兰气力输送有限公司 | Bed material adding system of circulating fluid bed boiler |
| CN204675383U (en) * | 2015-04-14 | 2015-09-30 | 中国华电工程(集团)有限公司 | A kind of adjustable air-transport system of exerting oneself |
| WO2017059955A1 (en) * | 2015-10-07 | 2017-04-13 | M-Tec Mathis Technik Gmbh | Method and conveyor device for conveying a medium |
| CN205606541U (en) * | 2016-05-09 | 2016-09-28 | 中国华电科工集团有限公司 | Circulating fluidized bed boiler bed material air conveying system |
| CN106090897A (en) * | 2016-06-13 | 2016-11-09 | 江苏润海能源科技有限公司 | Pneumatic type boiler bed add-on system |
| CN109552886A (en) * | 2018-12-07 | 2019-04-02 | 云南云天化石化有限公司 | Boiler plant pressurization bed material transportation system |
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