CN109442395A - A kind of system and method for realizing circulating fluidized bed boiler flexibility operation based on technology of acoustic wave - Google Patents
A kind of system and method for realizing circulating fluidized bed boiler flexibility operation based on technology of acoustic wave Download PDFInfo
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- CN109442395A CN109442395A CN201811519578.2A CN201811519578A CN109442395A CN 109442395 A CN109442395 A CN 109442395A CN 201811519578 A CN201811519578 A CN 201811519578A CN 109442395 A CN109442395 A CN 109442395A
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- fluidized bed
- outlet
- bed boiler
- circulating fluidized
- entrance
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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
- F23C10/06—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 the circulating movement being promoted by inducing differing degrees of fluidisation in different parts of the 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
- F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms
Abstract
A kind of system and method for realizing circulating fluidized bed boiler flexibility operation based on technology of acoustic wave provided by the invention, including circulating fluidized bed boiler and acoustic emission apparatus, wherein, circulating fluidized bed boiler includes lime stone dust feeder, coal feeder, burner hearth, horizontal flue, central tube, separator, material returning device and back-end ductwork；Acoustic emission apparatus includes loudspeaker, compression driving device and far-end control device；The present invention can neatly change the particle diameter distribution of exhaust gas dust by acoustic agglomeration effect, increase the circulating ratio of material, be directly beneficial for improving boiler combustion efficiency, reduce fly ash combustible material index, generate economic benefit；It is conducive to low nitrogen burning indirectly, reduces the concentration of emission of the polluted gas such as boiler SO2, NOX, generation environment benefit.
Description
Technical field
The present invention relates to circulating fluidized bed boiler power field, more particularly to one kind are ciculation fluidized based on technology of acoustic wave realization
The system and method for bed boiler flexibility operation.
Background technique
It is becoming tight environment situation day now, the extreme climates such as haze, coal rain emerge one after another, every profession and trade energy-saving and emission-reduction standard day
Benefit improves, and the coal consumption for power generation of Thermal Power Generation Industry and pollutant emission are even more the most important thing.Meanwhile it being sent out along with wind-power electricity generation, photovoltaic
The large-scale promotion of the renewable energy power generations technology such as electricity, nationwide " abandonment ", " abandoning light " phenomenon emerge one after another, especially the winter
Season heating period, installation the very high heat supply fired power generating unit of accounting because heat supply cause the online space of renewable power generation very limited,
It is extremely urgent to promote thermal power plant's operational flexibility.
Circulating fluidized bed boiler use fluidized combustion, primary structure include combustion chamber (including emulsion zone and dilute-phase zone) and
Circulation melts down (including high-temperature gas-solid separator and revert system) two large divisions, and main circulation loop is the pass of circulating fluidized bed boiler
Key, main function are to separate a large amount of bulky grain high-temp solid material from air-flow, combustion chamber are sent back to, to maintain to fire
Burn the stable fluidized state in room, guarantee that fuel and desulfurizing agent repeatedly recycles, burn and react repeatedly, with improve efficiency of combustion with
Desulfuration efficiency.Therefore, the big Matter Transfer of circulating fluidized bed boiler is run closely bound up with boiler combustion.Existing Matter Transfer
Adjustment mode mainly relies on wind flow adjustment of boiler, and means are single, consider boiler load and environmental requirement, it is difficult to realize
Flexibility operation.
Summary of the invention
It is based on what technology of acoustic wave realized circulating fluidized bed boiler flexibility operation the purpose of the present invention is to provide a kind of
System and method, solve the Matter Transfer adjustment mode in existing circulating fluidized bed boiler there are means it is single, be difficult to realize
The defect of flexibility operation.
In order to achieve the above object, the technical solution adopted by the present invention is that:
A kind of system that circulating fluidized bed boiler flexibility operation is realized based on technology of acoustic wave provided by the invention, including follow
Circulation fluidized bed boiler and acoustic emission apparatus, wherein
Circulating fluidized bed boiler includes lime stone dust feeder, coal feeder, burner hearth, horizontal flue, central tube, separation
Device, material returning device and back-end ductwork, wherein the outlet of lime stone dust feeder and the outlet of coal feeder are all connected with the bottom of burner hearth
Import, the exhanst gas outlet of burner hearth are connected the entrance of separator by horizontal flue, are provided on separator for large dust particle
The returning charge air port of outlet connects the entrance of material returning device, the large dust particle of the outlet connection burner hearth of material returning device by returning charge air port
Entrance；
The entrance of little particle dust outlet connection central tube on separator, the outlet connection back-end ductwork of central tube enter
Mouthful；
The bottom of burner hearth is additionally provided with primary air nozzle；
Acoustic emission apparatus includes loudspeaker, compression driving device and far-end control device, wherein loudspeaker is provided with
Several, are evenly arranged on the two sidewalls of horizontal flue；Meanwhile loudspeaker is connect with compression driving device, compression driving dress
It sets and is connected with far-end control device.
Preferably, overfiren air port is provided on the side wall of burner hearth.
Preferably, the bottom of burner hearth is additionally provided with slag-drip opening, which is connected with slag cooler, the outlet connection of slag cooler
Slag-draining device.
Preferably, water-cooling wall is provided at the top of burner hearth, the outlet of the water-cooling wall connects the entrance of water separator,
The entrance of the outlet connection back-end ductwork of water separator.
Preferably, far-end control device and compression driving device are provided with sender unit and signal amplifying apparatus,
Wherein, far-end control device connection signal sending device, signal generation apparatus connection signal amplifying device, signal amplifying apparatus connect
Connect compression driving device.
Preferably, back-end ductwork includes flue ontology, ash bucket and chimney, wherein the outlet connection ash bucket of flue ontology
Entrance, the entrance of the outlet connection chimney of ash bucket.
Preferably, it is provided with filter, reheater, economizer and air preheater in flue chamber body, central tube
The entrance of outlet connection filter, the outlet of filter successively connect the entrance of air preheater by reheater with economizer,
The entrance of the outlet connection ash bucket of air preheater.
Preferably, air-introduced machine is provided between the outlet of ash bucket and the entrance of chimney.
Preferably, the air intake of air preheater is connected with primary air fan and secondary air fan；The air of air preheater
The air inlet of outlet connection burner hearth；The outlet of primary air fan is additionally provided with a branch, which connects the entrance of material return blower, returns
Expect that the outlet of blower connects returning charge air port.
One kind realizing circulating fluidized bed boiler flexibility operation method based on technology of acoustic wave, is based on technology of acoustic wave based on a kind of
The system for realizing circulating fluidized bed boiler flexibility operation, wherein
Acoustic emission apparatus is set in circulating fluidized bed boiler, circulating fluidized bed boiler is determined by acoustic emission apparatus
The method of operation, specifically includes the following steps:
Promotion of the flying dust and the original circulating ash of burner hearth of lime stone dust feeder and coal feeder generation in First air
Lower to enter separator by horizontal flue, under the principle of cyclonic separation, large dust particle is back to burner hearth by material returning device, small
Granule dust then passes through central tube and drains into portion's flue；
Wherein, trigger signal is sent to compression driver according to operating status combination far-end control device, and then passed through
Compression meeting driver drive the speaker sounding, the sound wave that loudspeaker issues cause the agglomeration of fine particle in flue gas, in turn
Change the particle diameter distribution of exhaust gas dust, realizes the target of control loop multiplying power.
Compared with prior art, the beneficial effects of the present invention are:
A kind of system for realizing circulating fluidized bed boiler flexibility operation based on technology of acoustic wave provided by the invention, is recycling
Acoustic emission apparatus is set on horizontal flue on fluidized-bed combustion boiler, which realizes active flexible control material
Circulating ratio, rather than passively adjusted using a wind flow, significantly enhance circulating fluidized bed boiler operational flexibility；This
Invention can neatly change the particle diameter distribution of exhaust gas dust by acoustic agglomeration effect, increase the circulating ratio of material, directly have
Conducive to boiler combustion efficiency is improved, fly ash combustible material index is reduced, generates economic benefit；It is conducive to low nitrogen burning indirectly, reduces pot
The concentration of emission of the polluted gas such as furnace SO2, NOX, generation environment benefit.
Detailed description of the invention
Fig. 1 is present system flow chart；
Fig. 2 is present system schematic diagram；
1, lime stone dust feeder 2, coal feeder 3, primary air nozzle 4, overfiren air port 5, burner hearth 6, horizontal flue
7, water-cooling wall 8, water separator 9, loudspeaker 10, compression driving device 11, signal amplifying apparatus 12, signal hair
Generating apparatus 13, far-end control device 14, central tube 15, separator 16, returning charge air port 17, material returning device 18, superheater
19, reheater 20, economizer 21, air preheater 22, material return blower 23, secondary air fan 24, primary air fan 25, ash bucket
26, air-introduced machine 27, chimney 28, slag cooler 29, slag-draining device.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in more detail.
As depicted in figs. 1 and 2, provided by the invention a kind of based on technology of acoustic wave realization circulating fluidized bed boiler flexibility fortune
Capable system, including circulating fluidized bed boiler and acoustic emission apparatus, wherein acoustic emission apparatus enters recycle stream for controlling
Dust size distribution in fluidized bed boiler, and then the circulating ratio of control loop fluidized-bed combustion boiler；And then determine that this is ciculation fluidized
The method of operation of bed boiler is that dry run mode or original mode safety method of operation is adjusted flexibly.
Wherein, circulating fluidized bed boiler include lime stone dust feeder 1, coal feeder 2, primary air nozzle 3, overfiren air port 4,
Burner hearth 5, horizontal flue 6, separator 15, material returning device 17 and back-end ductwork, wherein the outlet of lime stone dust feeder 1 and give coal
The outlet of device 2 is all connected with the bottom inlet of burner hearth 5, and the exhanst gas outlet of burner hearth 5 connects entering for separator 15 by horizontal flue 6
Mouthful, the returning charge air port 16 on separator 15 for large dust particle outlet connects the entrance of material returning device 17, the outlet of material returning device 17
Connect the large dust particle entrance of burner hearth 15.
The entrance of little particle dust outlet connection central tube 14 on separator 15, the outlet of central tube 14 connects tail portion cigarette
The entrance in road.
The bottom of burner hearth 5 is arranged in primary air nozzle 3, for pushing the coal-fired flying dust generated and the original circulation of boiler
Ash；Overfiren air port 4 is arranged on the side wall of burner hearth 5.
The bottom of burner hearth 5 is additionally provided with slag-drip opening, and the lower section of primary air nozzle is arranged in the slag-drip opening, slag-drip opening connection
There is slag cooler 28, the outlet of slag cooler 28 connects slag-draining device 29；It can not be pushed by First air present in fire coal for collecting
Large dust particle.
The top of burner hearth 5 is provided with water-cooling wall 7, the entrance of the outlet connection water separator 8 of the water-cooling wall 7, vapour
The entrance of the outlet connection back-end ductwork of water separation device 8.
Acoustic emission apparatus includes loudspeaker 9, compression driving device 10, signal amplifying apparatus 11, signal generation apparatus
12 and far-end control device 13, wherein loudspeaker 9 is provided with several, is evenly arranged on the two sidewalls of horizontal flue 6；Meanwhile it raising
Sound device 9 is connect with compression driving device 10, and compression driving device 10 and signal amplifying apparatus 11 connect, signal amplifying apparatus
11 and signal generation apparatus 12 connect, signal generation apparatus 12 and far-end control device 13 connect.
Wherein, far-end control device 13 is the total end of coal fired power plant DCS control, is used to provide touching to signal generation apparatus 12
It signals, signal is amplified and be transferred on compression driver 10 by signal amplifying apparatus 11 by signal generation apparatus 12, is led to
10 drive the speaker 9 of overcompression formula driver issues sound wave.
Loudspeaker 9 can be loudspeaker；Compression driving device 10 generates high-frequency vibration air-flow, high-frequency vibration by compressed air
Air stream drives loudspeaker issue sound wave.
The sound wave that loudspeaker 9 issues causes the agglomeration of fine particle in flue gas, and then changes the partial size of exhaust gas dust
The target of control loop multiplying power is realized in distribution.It is sent out between dust particles under high-strength sound field reflecting based on acoustic agglomeration principle
Raw relative motion, so as to cause the collision of particle, for these little particles, Van der Waals force and electrostatic attraction play main make
With easily sticking together after collision, agglomerate into bulky grain.For circulating fluidized bed boiler, the particle the big more is easily separated
Device 15 is separated, and is back to burner hearth 5 through material returning device 17；Particle it is smaller it is easier captured by central tube 14, in the form of flying dust arrange
Toward back-end ductwork.Therefore, sound wave generating device can directly control Matter Transfer multiplying power by controlling particle diameter distribution.
Back-end ductwork includes flue ontology, ash bucket 25 and chimney 27, wherein the outlet connection ash bucket 25 of flue ontology enters
Mouthful, the entrance of the outlet connection chimney 27 of ash bucket 25.
In flue chamber body, filter 18, reheater 19, economizer are disposed with from flue ontology entrance to outlet
20 and air preheater 21, the entrance of the outlet connection filter 18 of central tube 14, reheating is successively passed through in the outlet of filter 18
Device 19 and economizer 20 connect the entrance of air preheater 21, the entrance of the outlet connection ash bucket 25 of air preheater 21.
Air-introduced machine 26 is provided between the outlet of ash bucket 25 and the entrance of chimney 27.
The air intake of air preheater 21 is connected with primary air fan 24 and secondary air fan 23.
The outlet of primary air fan 24 is additionally provided with a branch, which connects the entrance of material return blower 22, material return blower 22
Outlet connect returning charge air port 16.
Overfiren air port 4 on the air outlet slit connection burner hearth 5 of air preheater 21.
A kind of principle of system that realizing circulating fluidized bed boiler flexibility operation based on technology of acoustic wave is specifically:
The flying dust and the original circulating ash of boiler that fire coal generates, which enter under the promotion of First air by horizontal flue, to be divided
From device, under the principle of cyclonic separation, bulky grain is back to burner hearth by material returning device, and little particle then passes through central tube through tail portion cigarette
Road drains into ash bucket.For the bulky grain that can not be pushed by First air present in fire coal, then it is discharged by the slag-draining device of bottom
Outside furnace.In order to maintain the fluidizing stability of boiler, in the case where determining boiler flue gas outlet temperature, pass through control First air
Air quantity controls the circulating ratio of boiler material, be safely operated it can when putting into whether there is or not sound wave generating device.
Far-end control device 13 is connect with signal generation apparatus 12, in order to realize circulating fluidized bed boiler systems circulating ratio
And bed pressure is adjusted flexibly, and then realizes that boiler load safety and stability quickly adjusts, distal end master personnel is direct according to operating status
Signal instruction is provided, acoustic emission apparatus is instructed to run；
Signal generation apparatus 12 is through signal amplifying apparatus 11 by signal transduction to compression driver 10, drive the speaker 9
Issue sound wave.Loudspeaker 9 is to be driven by power amplifier, but the signal of the generation of signal generation apparatus will not also can not be direct
Ingoing power amplifier, but need to pre-process by signal amplifier, it then enters back into rear class and amplifies and push loudspeaking
Device.
The sound wave that loudspeaker 9 issues causes the agglomeration of fine particle in flue gas, and then changes the partial size of exhaust gas dust
The target of control loop multiplying power is realized in distribution.It is sent out between dust particles under high-strength sound field reflecting based on acoustic agglomeration principle
Raw relative motion, so as to cause the collision of particle, for these little particles, Van der Waals force and electrostatic attraction play main make
With easily sticking together after collision, agglomerate into bulky grain.For circulating fluidized bed boiler, the particle the big more is easily separated
Device 15 is separated, and is back to burner hearth 5 through material returning device 17；Particle it is smaller it is easier captured by central tube 14, in the form of flying dust arrange
Toward back-end ductwork.Therefore, sound wave generating device can directly control Matter Transfer multiplying power by controlling particle diameter distribution.
Loudspeaker 9 is evenly arranged in side walls according to the flat flue structure pattern of circulating fluidized bed boiler water.For following
Circulation fluidized bed boiler need to avoid spray gun position when installing loudspeaker since horizontal flue is usually disposed with out of stock spray gun, with
Exempt to interfere with each other and have an adverse effect.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. a kind of system for realizing circulating fluidized bed boiler flexibility operation based on technology of acoustic wave, which is characterized in that including circulation
Fluidized-bed combustion boiler and acoustic emission apparatus, wherein
Circulating fluidized bed boiler includes lime stone dust feeder (1), coal feeder (2), burner hearth (5), horizontal flue (6), center
Cylinder (14), separator (15), material returning device (17) and back-end ductwork, wherein the outlet of lime stone dust feeder (1) and coal feeder
(2) outlet is all connected with the bottom inlet of burner hearth (5), and the exhanst gas outlet of burner hearth (5) connects separator by horizontal flue (6)
(15) entrance is provided with the returning charge air port (16) for large dust particle outlet on separator (15), passes through returning charge air port
(16) entrance of material returning device (17), the large dust particle entrance of outlet connection burner hearth (15) of material returning device (17) are connected；
The outlet of the entrance of little particle dust outlet connection central tube (14) on separator (15), central tube (14) connects tail portion
The entrance of flue；
The bottom of burner hearth (5) is additionally provided with primary air nozzle (3)；
Acoustic emission apparatus includes loudspeaker (9), compression driving device (10) and far-end control device (13), wherein loudspeaking
Device (9) is provided with several, is evenly arranged on the two sidewalls of horizontal flue (6)；Meanwhile loudspeaker (9) and compression driving device
(10) it connects, compression driving device (10) and far-end control device (13) connection.
2. a kind of system that circulating fluidized bed boiler flexibility operation is realized based on technology of acoustic wave according to claim 1,
It is characterized in that, being provided with overfiren air port (4) on the side wall of burner hearth (5).
3. a kind of system that circulating fluidized bed boiler flexibility operation is realized based on technology of acoustic wave according to claim 1,
It is characterized in that, the bottom of burner hearth (5) is additionally provided with slag-drip opening, which is connected with slag cooler (28), slag cooler (28)
Outlet connection slag-draining device (29).
4. a kind of system that circulating fluidized bed boiler flexibility operation is realized based on technology of acoustic wave according to claim 1,
It is characterized in that, being provided with water-cooling wall (7) at the top of burner hearth (5), the outlet of the water-cooling wall (7) connects water separator
(8) entrance, the entrance of the outlet connection back-end ductwork of water separator (8).
5. a kind of system that circulating fluidized bed boiler flexibility operation is realized based on technology of acoustic wave according to claim 1,
It is characterized in that, far-end control device (13) and compression driving device (10) are provided with sender unit (12) and signal is put
Big device (11), wherein far-end control device (13) connection signal sending device (12), the amplification of signal generation apparatus connection signal
Device (11), signal amplifying apparatus connect compression driving device (10).
6. a kind of system that circulating fluidized bed boiler flexibility operation is realized based on technology of acoustic wave according to claim 1,
It is characterized in that, back-end ductwork includes flue ontology, ash bucket (25) and chimney (27), wherein the outlet of flue ontology connects ash
The entrance of bucket (25), the entrance of outlet connection chimney (27) of ash bucket (25).
7. a kind of system that circulating fluidized bed boiler flexibility operation is realized based on technology of acoustic wave according to claim 6,
It is characterized in that, being provided with filter (18), reheater (19), economizer (20) and air preheater in flue chamber body
(21), the entrance of outlet connection filter (18) of central tube (14), reheater (19) are successively passed through in the outlet of filter (18)
With the entrance of economizer (20) connection air preheater (21), the entrance of outlet connection ash bucket (25) of air preheater (21).
8. a kind of system that circulating fluidized bed boiler flexibility operation is realized based on technology of acoustic wave according to claim 6,
It is characterized in that, being provided with air-introduced machine (26) between the outlet of ash bucket (25) and the entrance of chimney (27).
9. a kind of system that circulating fluidized bed boiler flexibility operation is realized based on technology of acoustic wave according to claim 6,
It is characterized in that, the air intake of air preheater (21) is connected with primary air fan (24) and secondary air fan (23)；Air preheat
The air inlet of air outlet slit connection burner hearth (5) of device (21)；The outlet of primary air fan (24) is additionally provided with a branch, which connects
The entrance of material return blower (22) is connect, the outlet of material return blower (22) connects returning charge air port (16).
10. one kind realizes circulating fluidized bed boiler flexibility operation method based on technology of acoustic wave, which is characterized in that wanted based on right
Seek a kind of system that circulating fluidized bed boiler flexibility operation is realized based on technology of acoustic wave described in any one of 1-9, wherein
Acoustic emission apparatus is set in circulating fluidized bed boiler, the fortune of circulating fluidized bed boiler is determined by acoustic emission apparatus
Line mode, specifically includes the following steps:
The flying dust and burner hearth (5) original circulating ash that lime stone dust feeder (1) and coal feeder (2) generate are in First air
Lower pass through horizontal flue (6) are pushed to enter separator (15), under the principle of cyclonic separation, large dust particle passes through material returning device
(17) it is back to burner hearth (15), little particle dust then passes through central tube (14) and drains into portion's flue；
Wherein, trigger signal is sent to compression driver (10) according to operating status combination far-end control device (13), in turn
By compression meeting driver (10) drive the speaker (9) sounding, the sound wave that loudspeaker (9) issues causes fine particle in flue gas
Agglomeration, and then change the particle diameter distribution of exhaust gas dust, realize the target of control loop multiplying power.
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| CN112238003A (en) * | 2019-07-19 | 2021-01-19 | 中国石油化工股份有限公司 | Gas-solid separation device and coupling separation method |
| CN113203665A (en) * | 2020-01-21 | 2021-08-03 | 大唐环境产业集团股份有限公司 | Method for detecting granularity and particle size distribution of coal as fired |
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