CN109458614A - A kind of transformation device of circulating fluidized bed combustion coal boiler combustion biomass - Google Patents
A kind of transformation device of circulating fluidized bed combustion coal boiler combustion biomass Download PDFInfo
- Publication number
- CN109458614A CN109458614A CN201811107085.8A CN201811107085A CN109458614A CN 109458614 A CN109458614 A CN 109458614A CN 201811107085 A CN201811107085 A CN 201811107085A CN 109458614 A CN109458614 A CN 109458614A
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- CN
- China
- Prior art keywords
- burner hearth
- fluidized bed
- circulating fluidized
- air
- deduster
- 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.)
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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
-
- 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
Abstract
The invention discloses a kind of transformation devices of circulating fluidized bed combustion coal boiler combustion biomass, it includes burner hearth, the lower end and side of burner hearth are respectively arranged with cooler and revert system optimization device, there is air blower in the lower end of revert system optimization device, the side of revert system optimization device is connected to filter, economizer, air preheater, air preheater is connected to deduster, deduster is connected to chimney by air-introduced machine, there is feeding system in the side of burner hearth, feeding system includes feed inlet, flapper is provided in feed inlet, feeding system is connected to conveying system；The present invention passes through the transformation to conveying system, feeding system, make biomass conveying be open to traffic had it is more than needed, boiler load is improved, it also realizes simultaneously and biomass combustion flying dust is further collected, flying dust recirculation pipe is installed additional by dust collector ash hopper in connection boiler simultaneously, effectively increases the returning charge ash quantity of burner hearth in boiler system；By increasing low-pressure coal saver, reduces exhaust gas temperature, improves efficiency.
Description
Technical field
The invention belongs to boiler improvement device field, a kind of specially circulating fluidized bed combustion coal boiler combustion biomass changes
Make device.
Background technique
Coal-burning boiler is by restructuring and increasing biomass mixed-fuel burning proportion, during changing fired biomass, due to biomass
, there is the problem much run in more difference with coal property is burnt.
The most intuitive problem of coal-burning boiler be exactly conveying system, feeding system scarce capacity either existing conveying system,
The Design cooling load that the boiler that changed material system band not steams, influences stability.
In the control of circulating fluidized bed boiler, the control of returning charge ash quantity is maximally efficient measure, but biomass is more coal-fired
Content of ashes is low, and returning charge ash quantity tends not to the needs for meeting operation.Especially blow-on initial stage, if material-returning device is in shutdown period
Between overhaul and cleared up, to set up normal returning charge ash position and need a very very long process, with coal-fired ratio, biomass is not contained only
Ash quantity is few, and thin and light, and cyclone separator is difficult to capture, even if normal biomass boiler also faces, returning charge is insufficient to be asked
Topic.
And at this time because returning charge ash makes in-furnace temperature higher less, and because the requirement of incipient fluidization air quantity keeps oxygen amount higher, NOX's
Control is a very difficult thing.Even if there is SNCR equipment, for high-temperature oxygen-enriched environment, denitration efficiency is also extremely low
Under, or even it is invalid！Different with coal-burning boiler to be, biomass boiler controls freeboard temperature also must be very stringent.Cause
Make a large amount of molten conditions after freeboard temperature is high substantially lower than coal-fired ash fusion point due to being rich in potassium ion for biomass ash fusion point
Ash accumulation on steam-generating bank or superheater screen, block exhaust gases passes in furnace, cause flue gas flow rate to accelerate, to aggravate to grind
Damage and booster gather excessive grey block sometimes and can also fall into bed and influence fluidisation and cause coking.
The tail portion of coal-burning boiler is since biomass moisture content is more, and exhaust gas volumn is more, high fume temperature.
Summary of the invention
The purpose of the present invention is in view of the above problems, the present invention makes biology by the transformation to conveying system, feeding system
Matter conveying, which is open to traffic to have had, has more than needed, and boiler load is improved, while also being realized and further being collected to biomass combustion flying dust, simultaneously
Flying dust recirculation pipe is installed additional by dust collector ash hopper in connection boiler, effectively increases the returning charge ash quantity of burner hearth in boiler system；
By increasing low-pressure coal saver, reduces exhaust gas temperature, improves efficiency.
In order to achieve the above object, the technical solution adopted by the present invention is that: it includes burner hearth, the lower end of burner hearth and side difference
It is provided with cooler and revert system optimization device, the lower end of revert system optimization device is provided with air blower, and revert system is excellent
Disguise the side set to be connected to filter, the first economizer, air preheater, air preheater is connected to deduster, deduster
It is connected to chimney by air-introduced machine, the side of burner hearth is provided with feeding system, and feeding system includes boiler feed mouth, boiler feed
It is provided with flapper in mouthful, feeding system is connected to conveying system；It includes cyclone separator ontology, institute that revert system, which optimizes device,
It states cyclone separator body upper part side and is provided with feed inlet, and the upper end is provided with air outlet；The cyclone separator ontology
Bottom is provided with blanking port, and the cyclone separator bodies top is provided with water tank, and the water tank bottom is provided with diversion pipe；Institute
It states and is provided with rotary inductive switch in diversion pipe；Uniform intervals are provided with multiple infiltrations from top to bottom for the diversion pipe two sides of the bottom
Mouthful；The water conservancy diversion bottom of the tube is provided with water suction collection hawk on seepage mouth, and water suction collection hawk two sides are provided with clamping plate, and press from both sides
Plate is fixed on diversion pipe；The blanking port bottom is provided with returning charge bucket, and returning charge bucket side is connected with flying dust recycling
Pipe；Flying dust recirculation pipe is connected to the ash bucket of deduster lower end, and the side of returning charge bucket is connected to by connecting tube with burner hearth；Air is pre-
The second economizer group is provided between hot device and deduster.Furnace wall cooling pouring section destroys 3m height, conveying from top to bottom
System increases belt or improves speed, and the diameter of feed inlet is set as 800mm.
Further, cyclone separator ontology middle section is barrel, and the barrel side is provided with observation window；The cylinder
Wall bottom outside is provided with radiator fin device.
Further, the water suction collection hawk is two layers, and the setting of seepage mouth position is among two layers of water suction collection hawk；Institute
Stating water suction collection hawk is a kind of litaflex plate.
Further, the rotary inductive switch realizes that the speed driving induction of diversion pipe on-off is opened by revolving speed to be a kind of
It closes.
Further, the second economizer group is set as low-pressure coal saver.
Further, the second economizer group is set as three groups, respectively with primary air fan, secondary air fan, blower is connected to three times.
Beneficial effects of the present invention:
1, the present invention is promoted the speed of conveying system, by the transformation to conveying system, feeding system to feeding system blanking
Mouthful expanded, while being mounted with flapper, so that biomass conveying is open to traffic has had more than needed, and boiler load is improved.
2, dust collector ash hopper lower end ash pipeline flying dust recirculation pipe has been connect into burner hearth return port in the present invention, can not only dropped
Low unburned carbon in flue dust also plays a good role to raising returning charge ash quantity, solves the problems, such as that returning charge ash is insufficient.
3, in the present invention when revert system optimization device work, water suction is driven by rotational gas flow upper in cyclone separator center
Collect hawk rotation, triggering rotary inductive switch opens water tank；Water flow soaks water suction collection hawk by seepage mouth by diversion pipe, and
Moisture is infiltrated water suction and collects grey plate surface by the centrifugal force generated by rotation, when air-flow impact contact while pushing plate rotates
Plate face, thin and light burnning ash are bonded by moisture and assemble agglomerating, finally get rid of to drop down onto and be slipped at blanking port on barrel, to realize
Biomass burnning ash is carried out to the interior rising cyclone of cyclone separator body central to regather.
4, observation window and radiator fin device that revert system optimization dress of the present invention centers, may be implemented by observation
Portion's water suction collects the effect of hawk to control the running parameter with regulating device；Simultaneously to avoid ash disposal air excessively dry hot and
The biomass burnning ash assembled before causing is scattered again and is brought by air-flow into air when passing through barrel lower end, in barrel lower part
Radiator fin device is arranged in position, it is ensured that burnning ash particle can smoothly reach blanking port and enter returning charge bucket.
5, the water suction collection ash panel assembly in revert system optimization device of the present invention is a kind of litaflex plate, it is anti-in satisfaction
The light condition of caloic simultaneously, also has certain tensile strength and water imbibition；Therefore it adapts to rotate in cyclone separator completely
And it absorbs water and collects the function of ash.
6, the phenomenon that furnace wall cooling pouring section being abolished in the present invention, evaporation tube superheater tube screen is enable to melt dust stratification
Improved.
7, it reduces exhaust gas temperature by increasing by the second economizer group in the present invention, improve efficiency, also improve deduster
Running environment.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of apparatus of the present invention.
Fig. 2 is the structural schematic diagram that revert system optimizes device in the present invention.
Fig. 3 is the schematic cross-section that revert system optimizes structure on the diversion pipe of device in the present invention.
In figure: 1, burner hearth；2, conveying system；3, boiler feed mouth；4, flapper；5, cooler；6, revert system
Optimize device；7, filter；8, the first economizer；9, air preheater；10, the second economizer group；11, deduster；
12, chimney；13, air-introduced machine；14, blower three times；15, secondary air fan；16, primary air fan；17, air blower；18, it connects
Pipe；601, feed inlet；602, cyclone separator ontology；603, air outlet；604, blanking port；605, water tank；606, diversion pipe；
607, rotary inductive switchs；608, barrel；609, observation window；610, seepage mouth；611, clamping plate；612, water suction collection hawk；613,
Returning charge bucket；614, radiator fin device；615, flying dust recirculation pipe；1101, ash bucket；100, feeding system.
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, with reference to the accompanying drawing to the present invention into
Row detailed description, the description of this part be only it is exemplary and explanatory, should not have any limitation to protection scope of the present invention
Effect.
As shown in Figure 1-Figure 3, specific structure of the invention are as follows:
A kind of transformation device of circulating fluidized bed combustion coal boiler combustion biomass, it includes burner hearth 1, the lower end and side of burner hearth 1
It is respectively arranged with cooler 5 and revert system optimization device 6, the lower end of revert system optimization device 6 is provided with air blower 17, returns
The side of material system optimization apparatus 6 is connected to filter 7, the first economizer 8, air preheater 9, air preheater 9 and dedusting
Device 11 is connected to, and deduster 11 is connected to chimney 12 by air-introduced machine 13, and the side of burner hearth 1 is provided with feeding system 100, feed system
System 100 includes boiler feed mouth 3, is provided with flapper 4 in boiler feed mouth 3, feeding system 100 is connected to conveying system 2；It returns
Expect that system optimization apparatus 6 includes cyclone separator ontology 602, the 602 top side of cyclone separator ontology is provided with charging
Mouth 601, and the upper end is provided with air outlet 603；602 bottom of cyclone separator ontology is provided with blanking port 604, the rotation
Water tank 605 is provided at the top of wind separator body 602,605 bottom of water tank is provided with diversion pipe 606；The diversion pipe 606
Inside it is provided with rotary inductive switch 607；Uniform intervals are provided with multiple seepage mouths from top to bottom for 606 two sides of the bottom of diversion pipe
610；606 bottom of diversion pipe is provided with water suction collection hawk 612 on seepage mouth 610, and the water suction collection 612 two sides of hawk are set
It is equipped with clamping plate 611, and clamping plate 611 is fixed on diversion pipe 606；604 bottom of blanking port is provided with returning charge bucket 613,
And 613 side of returning charge bucket is connected with flying dust recirculation pipe 615；The ash bucket 1101 of flying dust recirculation pipe 615 and 11 lower end of deduster
The side of connection, returning charge bucket 613 is connected to by connecting tube 18 with burner hearth 1；Is provided between air preheater 9 and deduster 11
Two economizer groups 10.Conveying system 2 increases belt or improves speed, and the diameter of feed inlet 601 is set as 800mm, can go expansion
Greatly, while flapper 4 is mounted with, so that biomass conveying is open to traffic has had more than needed, and boiler load is improved.1 water-cooling wall of burner hearth pours
The phenomenon that note part destroys 3m height from top to bottom, evaporation tube superheater tube screen is enable to melt dust stratification is improved.
In order to further facilitate the control device progress of work and improve flying dust collection efficiency, the cyclone separator ontology
602 middle sections are barrel 608, and 608 side of barrel is provided with observation window 609；608 bottom outside of barrel is provided with heat dissipation
Sheet devices 614.
In order to improve flying dust collection efficiency and meet operating environment requirements, the water suction collection hawk 612 is two layers, and is seeped water
The setting of 610 positions of mouth is among two layers of water suction collection hawk 612；The water suction collection hawk 612 is a kind of litaflex plate.
In order to realize 606 auto switching function of diversion pipe, the rotary inductive switch 607 is that a kind of realized by revolving speed is led
The speed of 606 on-off of flow tube drives inductive switch.
In order to reduce exhaust gas temperature, improve efficiency, the running environment of deduster is also improved, by the second economizer group 10
Be set as low-pressure coal saver, the second economizer group 10 is set as three groups, respectively with primary air fan 16, secondary air fan 15, tertiary air
Machine 14 is connected to.
When revert system optimizes the work of device device, water suction collection hawk is driven by rotational gas flow upper in cyclone separator center
Rotation, triggering rotary inductive switch open water tank；Water flow soaks water suction collection hawk by seepage mouth by diversion pipe, and passes through rotation
Moisture is infiltrated water suction and collects grey plate surface by raw centrifugal force of changing the line of production, impact contact plate face while air-flow is in pushing plate rotation,
Thin and light burnning ash is bonded by moisture and assembles agglomerating, finally gets rid of to drop down onto and is slipped at blanking port on barrel.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.
Used herein a specific example illustrates the principle and implementation of the invention, the explanation of above example
It is merely used to help understand method and its core concept of the invention.The above is only a preferred embodiment of the present invention, it answers
When pointing out due to the finiteness of literal expression, and objectively there is unlimited specific structure, for the common skill of the art
For art personnel, without departing from the principle of the present invention, several improvement, retouching or variation can also be made, can also incited somebody to action
Above-mentioned technical characteristic is combined in the right way；These improve retouching, variation or combination, or the not improved structure by invention
Think and technical solution directly applies to other occasions, is regarded as protection scope of the present invention.
Claims (6)
1. a kind of transformation device of circulating fluidized bed combustion coal boiler combustion biomass, it includes burner hearth (1), the lower end of burner hearth (1)
It is respectively arranged with cooler (5) and revert system optimization device (6) with side, revert system optimizes the lower end setting of device (6)
Have air blower (17), revert system optimizes side and filter (7), the first economizer (8), the air preheater (9) of device (6)
Connection, air preheater (9) are connected to deduster (11), and deduster (11) is connected to chimney (12) by air-introduced machine (13),
It is characterized in that, the side of burner hearth (1) is provided with feeding system (100), and feeding system (100) includes boiler feed mouth (3), boiler
It is provided with flapper (4) in feed inlet (3), feeding system (100) is connected to conveying system (2)；Revert system optimizes device (6)
Including cyclone separator ontology (602), cyclone separator ontology (602) the top side is provided with feed inlet (601), and its
Upper end is provided with air outlet (603)；Cyclone separator ontology (602) bottom is provided with blanking port (604), the whirlwind point
From being provided with water tank (605) at the top of device ontology (602), water tank (605) bottom is provided with diversion pipe (606)；The water conservancy diversion
Rotary inductive switch (607) is provided in pipe (606)；Uniform intervals are provided with from top to bottom for diversion pipe (606) two sides of the bottom
Multiple seepage mouths (610)；Diversion pipe (606) bottom is provided with water suction collection hawk (612) on seepage mouth (610), described
Water suction collection hawk (612) two sides are provided with clamping plate (611), and clamping plate (611) is fixed on diversion pipe (606)；It is described to fall
Material mouth (604) bottom is provided with returning charge bucket (613), and returning charge bucket (613) side is connected with flying dust recirculation pipe (615)；Flying dust
Recirculation pipe (615) is connected to the ash bucket (1101) of deduster (11) lower end, and the side of returning charge bucket (613) passes through connecting tube (18)
It is connected to burner hearth (1)；The second economizer group (10) is provided between air preheater (9) and deduster (11).
2. a kind of transformation device of circulating fluidized bed combustion coal boiler combustion biomass according to claim 1, feature exist
In cyclone separator ontology (602) middle section is barrel (608), and barrel (608) side is provided with observation window (609)；
Barrel (608) bottom outside is provided with radiator fin device (614).
3. a kind of transformation device of circulating fluidized bed combustion coal boiler combustion biomass according to claim 1, feature exist
In water suction collection hawk (612) is two layers, and the setting of seepage mouth (610) position is intermediate in two layers of water suction collection hawk (612)；
Water suction collection hawk (612) is a kind of litaflex plate.
4. a kind of transformation device of circulating fluidized bed combustion coal boiler combustion biomass according to claim 1, feature exist
In the rotary inductive switch (607) is a kind of speed driving inductive switch for realizing diversion pipe (606) on-off by revolving speed.
5. a kind of transformation device of circulating fluidized bed combustion coal boiler combustion biomass according to claim 1, feature exist
In the second economizer group (10) is set as low-pressure coal saver.
6. a kind of transformation device of circulating fluidized bed combustion coal boiler combustion biomass according to claim 5, feature exist
In, the second economizer group (10) is set as three groups, respectively with primary air fan (16), secondary air fan (15), three times blower (14) even
It is logical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107085.8A CN109458614B (en) | 2018-09-21 | 2018-09-21 | Reforming device for biomass combustion of circulating fluidized bed coal-fired boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107085.8A CN109458614B (en) | 2018-09-21 | 2018-09-21 | Reforming device for biomass combustion of circulating fluidized bed coal-fired boiler |
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| CN109458614A true CN109458614A (en) | 2019-03-12 |
| CN109458614B CN109458614B (en) | 2020-01-21 |
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Cited By (1)
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| CN112325282A (en) * | 2020-10-29 | 2021-02-05 | 中国石油化工集团有限公司 | Circulating fluidized bed flue gas and fly ash combined circulating system and control method |
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