CN109506230A - Environment-friendly and energy-efficient biomass recirculating fluidized bed boiler - Google Patents
Environment-friendly and energy-efficient biomass recirculating fluidized bed boiler Download PDFInfo
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- CN109506230A CN109506230A CN201811549505.8A CN201811549505A CN109506230A CN 109506230 A CN109506230 A CN 109506230A CN 201811549505 A CN201811549505 A CN 201811549505A CN 109506230 A CN109506230 A CN 109506230A
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- burner hearth
- pipe
- feed pipe
- fluidized bed
- feed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
- F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
- F23C10/08—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases
- F23C10/10—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases the separation apparatus being located outside the combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
-
- 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
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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
Environment-friendly and energy-efficient biomass recirculating fluidized bed boiler, it is related to a kind of circulating fluidized bed boiler.The existing burning in circulating fluid bed boiler low efficiency of present invention solution, disposal of pollutants are more, and easy slagging blocking and normal ash deposits corrosion lead to the high problem of boiler failure rate.Feed pipe is vertically arranged and its lower end and feed pipe upper end airtight connection, the first sealing air pipe are located at the junction of feed pipe and the first feed pipe, and annular conveying air hose is mounted on the first feed pipe；Feed supplementing device is arranged in burner hearth body bottom portion and is located in the lower section of biomass feeding apparatus, feed supplement pipe is vertically arranged and the top airtight connection of its lower end and the second feed pipe, first sealing air pipe with the upper end of the second feed pipe is closed is connected to, material seeding air hose with the bottom of the second feed pipe is closed is connected to；The bottom end of burner hearth ontology is arranged in slag-draining device and the two is interconnected；Upper overfire air device and lower overfire air device are from top to bottom successively set on the lower part of burner hearth ontology.The present invention is used for biomass boiler cogeneration of heat and power and central heating.
Description
Technical field
The present invention relates to a kind of circulating fluidized bed boiler, and in particular to environment-friendly and energy-efficient biomass recirculating fluidized bed boiler,
Realize the burning of biomass energy clean and effective.
Background technique
By " Biomass Energy Development " 13 " planning " and " guidance meaning of the promotion biomass energy for thermally developing of country's publication
See " require and China's regional area limit coal, prohibit coal work development, accelerate the exploitation of biomass recirculating fluidized bed boiler,
It needs to reach and cleans burning and low pollution emission and steady load operation.Agriculture and forestry biomass open incineration can lead to haze,
The damage to environment such as fire；The improper pollution that will cause to natural resources of animal husbandry waste harmlessness disposing.
With environmental protection, energy saving increasingly stringent and perfect, the ring that Combustion technology of circulating fluidized has by it
Guaranteed cost is rapidly developed, and environment-friendly and energy-efficient biomass recirculating fluidized bed boiler has been promoted to develop and apply.
Currently, existing biomass boiler efficiency of combustion is low, disposal of pollutants is more, fuel range is narrow, easy slagging blocks and normal
Ash deposits corrosion, the problem for causing boiler failure rate high.
Summary of the invention
The present invention is that the existing biomass boiler efficiency of combustion of solution is low, disposal of pollutants is more, fuel range is narrow, easy slagging is stifled
Plug and normal ash deposits corrosion, the problem for causing boiler failure rate high, and then a kind of environment-friendly and energy-efficient biomass circulating fluidized bed is provided
Boiler.
The technical solution adopted by the present invention to solve the above technical problem is:
Environment-friendly and energy-efficient biomass recirculating fluidized bed boiler of the invention include biomass feeding apparatus 1, feed supplementing device 2,
Slag-draining device 3, burner hearth ontology 4, lower overfire air device 5, upper overfire air device 6, separation material-returning device 7, low-level (stack-gas) economizer 13, height
Warm economizer 17, convection bank 34, low temperature superheater 39 and air preheater 9；Biomass feeding apparatus 1 include feed pipe 1-2,
First feed pipe 1-3, the first sealing air pipe 1-4 and annular conveying air hose 1-5, feed pipe 1-2 be vertically arranged and its lower end with into
The upper end expects pipe 1-3 airtight connection, the lower end of feed pipe 1-3 are connected to setting, the first sealing air with the negative pressure point of 4 lower part of burner hearth ontology
Pipe 1-4 is located at the junction of feed pipe 1-2 and the first feed pipe 1-3, and annular conveying air hose 1-5 is mounted on the first feed pipe 1-3
On；
Feed supplementing device 2 is arranged in 4 bottom of burner hearth ontology and is located in the lower section of biomass feeding apparatus 1, and feed supplementing device 2 wraps
Feed supplement pipe 2-2, the second feed pipe 2-3, the first sealing air pipe 2-4 and material seeding air hose 2-5 are included, feed supplement pipe 2-2 is vertically arranged and it
The closed company in upper end of the top airtight connection of lower end and the second feed pipe 2-3, the first sealing air pipe 2-4 and the second feed pipe 2-3
It is logical, material seeding air hose 2-5 with the bottom of the second feed pipe 2-3 is closed is connected to；
The bottom end of burner hearth ontology 4 is arranged in slag-draining device 3 and the two is interconnected；
Upper overfire air device 6 and lower overfire air device 5 are from top to bottom successively set on the lower part of burner hearth ontology 4, upper secondary
Wind apparatus 6 is correspondingly arranged with charging gear 1, and lower overfire air device 5 is correspondingly arranged with feed supplementing device 2；
Medium temperature screen superheater 43 and high temperature screen superheater 48 are from top to bottom disposed in 4 dilute-phase zone 4-2 of burner hearth ontology；
Low-level (stack-gas) economizer 13, high-temperature economizer 17, convection bank 34, low temperature superheater 39 and 9 tail portion of air preheater by
Heat exchange surface arrangement is in boiler back end ductwork 8, convection bank 34, low temperature superheater 39, high-temperature economizer 17,13 and of low-level (stack-gas) economizer
Air preheater 9 is from top to bottom sequentially arranged；
The top of the top side and burner hearth ontology 4 that separate material-returning device 7, which is interconnected, to be arranged, separation material-returning device 7
Bottom and the bottom of burner hearth ontology 4, which are interconnected, to be arranged, and the entrance at the top and back-end ductwork 8 that separate material-returning device 7 mutually interconnects
It is logical.
In one embodiment, lower overfire air device 5 includes first annular isobaric wind cabin 5-1, multiple first variable cross-sections
Accelerate spout 5-2 and multiple lime stone adapter tube 5-3, first annular equipressure wind cabin 5-1 that the lateral wall of 4 lower part of burner hearth ontology is set
On, multiple first variable cross-sections accelerate spout 5-2 to be uniformly arranged the lateral wall in burner hearth ontology 4 along the circumferencial direction of burner hearth ontology 4
On, the first variable cross-section accelerates the upper end of spout 5-2 to be connected to first annular equipressure wind cabin 5-1, and the first variable cross-section accelerates spout 5-2
Lower end be connected to burner hearth ontology 4, each first variable cross-section accelerates to be connected with a lime stone adapter tube at the variable cross-section of spout 5-2
5-3；First variable cross-section acceleration spout 5-2 is located above material seeding air hose 2-5 and the two is disposed adjacent.
In one embodiment, upper overfire air device 6 includes the second ring-shaped constant pressure wind cabin 6-1 and multiple second variable cross-sections
Spout 6-2, the second ring-shaped constant pressure wind cabin 6-1 is accelerated to be arranged on the lateral wall of 4 lower part of burner hearth ontology, multiple second variable cross-sections add
Fast spout 6-2 is uniformly arranged on the lateral wall of burner hearth ontology 4 along the circumferencial direction of burner hearth ontology 4, and the second variable cross-section accelerates spray
The upper end of mouth 6-2 is connected to the second ring-shaped constant pressure wind cabin 6-1, and the second variable cross-section accelerates the lower end of spout 6-2 and burner hearth ontology 4 to connect
Logical, the second variable cross-section accelerates spout 6-2 above the first feed pipe 1-3 and the two is disposed adjacent.
In one embodiment, separation material-returning device 7 includes separator and material returning device, the lower end of separator and material returning device
Upper end connection, the top side of separator is connected to burner hearth ontology 4, and the top of separator is connected to boiler back end ductwork, divides
Lower end from device is connected to the upper end of material returning device, and the lower end of material returning device is connected to burner hearth ontology 4.
In one embodiment, slag-draining device 3 includes scum pipe 3-1 and accident scum pipe 3-2, accident scum pipe 3-2
Upper end and burner hearth ontology 4 bottom end be interconnected, the lower end of accident scum pipe 3-2 is connected to the upper end of scum pipe 3-1.
In one embodiment, biomass feeding apparatus 1 further includes the first type metal expansion joint 1-1, the first expansion of metal
The top of feed pipe 1-2 is arranged in section 1-1.
In one embodiment, feed supplementing device 2 further includes the second type metal expansion joint 2-1, and the second type metal expansion joint 2-1 is set
It sets on the top of feed supplement pipe 2-2.
In one embodiment, air preheater pipe uses horizontal arrangement, and transverse pitch and longitudinal pitch are between pipe
80mm。
In one embodiment, convection bank 34 arranges that the tube spacing of convection bank 34 is using in-line, parallel baffled
200mm；Low temperature superheater 39 uses in-line arrangement, and the tube spacing of low temperature superheater 39 is 100mm.
The beneficial effects of the present invention are:
Environment-friendly and energy-efficient biomass recirculating fluidized bed boiler of the invention chooses biggish furnace heating surface product, to reduce master
Ignition temperature in circulation loop, control is at 800 DEG C hereinafter, to prevent in furnace and convection bank slagging；
A large amount of recycle stock in environment-friendly and energy-efficient biomass recirculating fluidized bed boiler main circulation loop of the invention, has
Good to prevent water wall surface slagging from deashing characteristic, furnace bottom is arranged heavy caliber scum pipe, is effectively displaced burned
The small clinker generated in journey；
Contain a large amount of material in environment-friendly and energy-efficient biomass recirculating fluidized bed boiler burner hearth of the invention, in combustion process
In a large amount of material upper furnace is carried to by flue gas, by being arranged in the separator of furnace outlet, material and flue gas are separated,
And by returning charge valve by loopback of material to bed, multiple circulating combustion, due to material concentration height, with very big thermal capacity and good
Good material mixing, boiler are stronger to the adaptability of biomass fuel type；
Environment-friendly and energy-efficient biomass recirculating fluidized bed boiler reasonable distribution First air of the invention, Secondary Air ratio, adjustment
Combustion share in furnace, the fluctuation of adapted biomass moisture；
Environment-friendly and energy-efficient biomass recirculating fluidized bed boiler of the invention chooses the excess air coefficient of larger air, realizes
The overheavy firing of lower furnace portion, to improve efficiency of combustion；
Environment-friendly and energy-efficient biomass recirculating fluidized bed boiler of the invention constructs the air stage feeding of no gradient, anoxycausis
Reduction field areas, realize based on bed mass improve redox condition reform, so that depth inhibits nitrogen oxides
It is originally generated.
Detailed description of the invention
Fig. 1 is the overall structure main view of environment-friendly and energy-efficient biomass recirculating fluidized bed boiler of the invention；
Fig. 2 is the left cross-sectional view (A-A of Zuo Banwei Fig. 1 of environment-friendly and energy-efficient biomass recirculating fluidized bed boiler of the invention
Left cross-sectional view, right is partly the right half sectional view of B-B of Fig. 1)；
Fig. 3 is the C-C cross-sectional view of Fig. 1；
Fig. 4 is the D-D cross-sectional view of Fig. 1；
Fig. 5 is the connection signal of 8 internal heating surface of burner hearth ontology 4 and boiler back end ductwork in the specific embodiment of the invention one
Figure；
Fig. 6 is the structural schematic diagram of biomass feeding apparatus 1 and feed supplementing device 2 in the specific embodiment of the invention one；
Fig. 7 is the knot that upper overfire air device 6 in overfire air device 5 and specific embodiment three is descended in specific embodiment two
Structure schematic diagram；
Fig. 8 is the structural schematic diagram that material-returning device 7 is separated in specific embodiment four；
Fig. 9 is the main view of convection bank 34 in the specific embodiment of the invention one；
Figure 10 is the left view of convection bank 34 in the specific embodiment of the invention one；
Figure 11 is the main view of air preheater 9 in the specific embodiment of the invention one；
Figure 12 is the cross-sectional view of F-F in Figure 11；
Figure 13 is the cross-sectional view of the E-E of Figure 12.
In figure: 1 be biomass feeding apparatus, 2 be feed supplementing device, 3 be slag-draining device, 4 be burner hearth ontology, 5 be under it is secondary
Wind apparatus, 6 be upper overfire air device, 7 be separation material-returning device, 8 be back-end ductwork, 9 be air preheater, 10 be column, Liang He
Platform staircase, 11 be distribution header, 12 be low-level (stack-gas) economizer import header, 13 be low-level (stack-gas) economizer, 14 be high-temperature economizer into
Mouthful header, 15 be the first aqueduct, 16 be high-temperature economizer import header, 17 be high-temperature economizer, 18 be that high-temperature economizer goes out
Mouthful header, 19 be the second aqueduct, 20 be drum, 21 recirculation pipes, 22 be down-comer, 23 be premode wall lower header, 24 be
Side form formula wall lower header, 25 be rear mode wall lower header, 26 be premode wall, 27 be side form formula wall, 28 be rear mode wall, 29 be
Front and back membrane wall upper collecting chamber, 30 be side form formula wall upper collecting chamber, 31 be fairlead, 32 be convection bank down-comer, 33 be convection tube
Beam lower header, 34 be convection bank, 35 be convection bank upper collecting chamber, 36 be the first steam guiding tube, 37 be saturated vapor fairlead, 38
For it is low cross import header, 39 be low temperature superheater, 40 be it is low cross outlet header, 41 be the second steam guiding tube, 42 be medium temperature screen formula mistake
Import header, 43 be medium temperature pendant superheater, 44 be medium temperature screen formula cross outlet header, 45 be third steam guiding tube, 46 be water spray subtract
Warm device, 47 be high temperature screen formula cross import header, 48 be high temperature pendant superheater, 49 be that high temperature screen formula crosses outlet header, 50 is
Four steam guiding tubes, 51 are collection vapour header.
Specific embodiment
Specific embodiment 1: as shown in Figure 1, the environment-friendly and energy-efficient biomass recirculating fluidized bed boiler packet of present embodiment
Include biomass feeding apparatus 1, feed supplementing device 2, slag-draining device 3, burner hearth ontology 4, lower overfire air device 5, upper overfire air device 6,
Separate material-returning device 7, low-level (stack-gas) economizer 13, high-temperature economizer 17, convection bank 34, low temperature superheater 39 and air preheater 9；
Biomass feeding apparatus 1 includes that feed pipe 1-2, the first feed pipe 1-3, the first sealing air pipe 1-4 and annular convey air hose 1-5,
Feed pipe 1-2 is vertically arranged and its lower end and the upper end feed pipe 1-3 airtight connection, under the lower end of feed pipe 1-3 and burner hearth ontology 4
The negative pressure point in portion is connected to setting, and the first sealing air pipe 1-4 is located at the junction of feed pipe 1-2 and the first feed pipe 1-3, and annular is defeated
Air supply tube 1-5 is mounted on the first feed pipe 1-3；
Feed supplementing device 2 is arranged in 4 bottom of burner hearth ontology and is located in the lower section of biomass feeding apparatus 1, and feed supplementing device 2 wraps
Feed supplement pipe 2-2, the second feed pipe 2-3, the first sealing air pipe 2-4 and material seeding air hose 2-5 are included, feed supplement pipe 2-2 is vertically arranged and it
The closed company in upper end of the top airtight connection of lower end and the second feed pipe 2-3, the first sealing air pipe 2-4 and the second feed pipe 2-3
It is logical, material seeding air hose 2-5 with the bottom of the second feed pipe 2-3 is closed is connected to；
The bottom end of burner hearth ontology 4 is arranged in slag-draining device 3 and the two is interconnected；
Upper overfire air device 6 and lower overfire air device 5 are from top to bottom successively set on the lower part of burner hearth ontology 4, upper secondary
Wind apparatus 6 is correspondingly arranged with charging gear 1, and lower overfire air device 5 is correspondingly arranged with feed supplementing device 2；
Medium temperature screen superheater 43 and high temperature screen superheater 48 are from top to bottom disposed in 4 dilute-phase zone 4-2 of burner hearth ontology；
Low-level (stack-gas) economizer 13, high-temperature economizer 17, convection bank 34, low temperature superheater 39 and 9 tail portion of air preheater by
Heat exchange surface arrangement is in boiler back end ductwork 8, convection bank 34, low temperature superheater 39, high-temperature economizer 17,13 and of low-level (stack-gas) economizer
Air preheater 9 is from top to bottom sequentially arranged；
The top of the top side and burner hearth ontology 4 that separate material-returning device 7, which is interconnected, to be arranged, separation material-returning device 7
Bottom and the bottom of burner hearth ontology 4, which are interconnected, to be arranged, and the entrance at the top and back-end ductwork 8 that separate material-returning device 7 mutually interconnects
It is logical.
The feed pipe 1-2 of biomass feeding apparatus 1 is arranged in the negative pressure point of lower furnace portion, and biomass is along with upper Secondary Air
Enter in furnace with lower Secondary Air, effectively prevent being fed unsmooth；
Sealing air and annular conveying wind are configured on feed pipe 1-2, so that air hose tail portion is formed negative pressure, are effectively prevent flue gas anti-
It alters；
Since biomass fuel ash content is light, circulating ash is made to adding materials in burner hearth by feed supplementing device 2, can to burner hearth by
Hot-face surface coagulation washes away, and avoids slagging dust stratification and corrosion.
Burner hearth Anti-slagging, dust stratification and not dust stratification, corrosion-resistant measure:
The design of burner hearth ontology 4 has biggish furnace heating surface, and medium temperature screen superheater 43 and high temperature screen are arranged in burner hearth
Superheater 48, to reduce furnace chamber inner combustion temperature, control is at 800 DEG C hereinafter, to prevent furnace high-temperature slagging；
Separation revert system circulation loop in have a large amount of recycle stock, have it is good from deashing characteristic, furnace can be prevented
Thorax Boiler Heating Surfaces；
Medium temperature pendant superheater 43, high temperature pendant superheater 48 are arranged in burner hearth, corruption is prevented using resistant material
Erosion reduces furnace chamber inner combustion temperature, avoids slagging and realize low nitrogen burning.
Overfire air device:
Biggish Secondary Air ratio is arranged: First air, lower Secondary Air, upper Secondary Air ratio are followed successively by 4:3:3, more adapt to life
The big feature of substance fluidized-bed combustion boiler upper furnace combustion share, while by reasonable distribution First air, Secondary Air ratio, it adapts to
The dynamic characteristic of biomass water partial wave；
Choosing biggish excess air coefficient is about 1.4, realizes lower furnace portion overheavy firing, prevents due to ignition temperature is low
Reduce efficiency of combustion；
The air stage feeding of no gradient, the reduction field areas of anoxycausis are constructed, the oxygen improved based on bed mass is realized
Change reducing atmosphere to reform, so that depth inhibits being originally generated for nitrogen oxides.
Tail portion accumulatingdust and slagging and corrosion-resistant measure:
Reasonable Arrangement back-end surfaces pipe arranges spacing, and convection bank in-line arrangement, parallel baffled increase tube spacing extremely
200mm；Low temperature superheater uses in-line arrangement, increases tube spacing to 100mm, prevents slagging from avoiding corroding；
The cloth soot blower interface in convection bank, low temperature superheater effective range；In economizer, the effective model of air preheater
Interior cloth soot blower interface is enclosed, arranges that enough soot blowers, selective sootblowing prevent dust stratification from slagging being avoided to corrode；
Back-end surfaces flue gas flow rate is reasonably selected, 11~13m/s of velocity of flue gas at low temperature superheater, flue gas at economizer
9~11m/s of speed, velocity of flue gas~10m/s at air preheater enhance self-cleaning ability under conditions of not wearing.
Convection bank structure:
Reasonable Arrangement back-end surfaces pipe arranges spacing, and convection bank carries out in-line arrangement, parallel baffled, increases tube spacing extremely
200mm；Prevent slagging from avoiding corroding；
Convection bank area 8~10m/s of flue gas flow rate is rationally designed, under conditions of not wearing, is enhanced from deashing energy
Power.
It is reserved in convection bank effective range and rushes soot blower interface, can arrange that enough soot blowers, selective sootblowing prevent
Dust stratification avoids corroding；
Air preheater:
Design the air preheater of larger heating surface, it is ensured that match air temperature, to guarantee the biggish biomass combustion of moisture content；
Using multi-staged air preheater design, 4-6 level structure ensures that hot blast temperature is greater than 200 DEG C, to guarantee to enter burner hearth
Fuel can burn as early as possible, and maintain certain combustion temperature in hearth, realize efficient combustion；
The circulating fluidized bed boiler further includes column, beam and top plate, and the periphery of burner hearth ontology 4 is arranged in column, beam and top plate.
So set, column, beam and top plate may be implemented to hang the branch of boiler and steam/water circulating.
Specific embodiment 2: as shown in Figure 1 and Figure 7, overfire air device 5 includes first annular equipressure under present embodiment
Wind cabin 5-1, multiple first variable cross-sections accelerate spout 5-2 and multiple lime stone adapter tube 5-3, first annular equipressure wind cabin 5-1 setting
On the lateral wall of 4 lower part of burner hearth ontology, multiple first variable cross-sections accelerate spout 5-2 uniformly distributed along the circumferencial direction of burner hearth ontology 4
It is arranged on the lateral wall of burner hearth ontology 4, the first variable cross-section accelerates the upper end of spout 5-2 and first annular equipressure wind cabin 5-1 to connect
Logical, the first variable cross-section accelerates the lower end of spout 5-2 to be connected to burner hearth ontology 4, and each first variable cross-section accelerates the change of spout 5-2 to cut
A lime stone adapter tube 5-3 is connected at face；First variable cross-section accelerates spout 5-2 to be located at the top material seeding air hose 2-5 and the two phase
Neighbour's setting, lower overfire air device 5 are arranged in 4 lower furnace emulsion zone 4-1 of burner hearth ontology.
It is designed in this way, the bigger feature of adapted biomass fluid bed boiler furnace top combustion share, realizes lower furnace portion
Strong burning, improves efficiency of combustion.Other compositions and connection relationship are same as the specific embodiment one.
Specific embodiment 3: as shown in Figure 1 and Figure 7, overfire air device 6 includes the second ring-shaped constant pressure in present embodiment
Wind cabin 6-1 and multiple second variable cross-sections accelerate spout 6-2, the second ring-shaped constant pressure wind cabin 6-1 that the outer of 4 lower part of burner hearth ontology is arranged in
On side wall, multiple second variable cross-sections accelerate spout 6-2 to be uniformly arranged along the circumferencial direction of burner hearth ontology 4 in the outer of burner hearth ontology 4
On side wall, the second variable cross-section accelerates the upper end of spout 6-2 to be connected to the second ring-shaped constant pressure wind cabin 6-1, and the second variable cross-section accelerates spray
The lower end of mouth 6-2 is connected to burner hearth ontology 4, and the second variable cross-section accelerates spout 6-2 to be located at the first top feed pipe 1-3 and the two phase
Neighbour's setting, upper overfire air device 6 are arranged in 4 lower furnace emulsion zone 4-1 of burner hearth ontology.
It is designed in this way, the bigger feature of adapted biomass fluid bed boiler furnace top combustion share, realizes lower furnace portion
Strong burning, improves efficiency of combustion.Other compositions and connection relationship are the same as one or two specific embodiments.
Specific embodiment 4: as illustrated in figures 1 and 8, it includes separator and returning charge that present embodiment, which separates material-returning device 7,
Device, the lower end of separator are connected to the upper end of material returning device, and the top side of separator is connected to burner hearth ontology 4, the top of separator
End is connected to 8 upper end of boiler back end ductwork, and the lower end of separator is connected to the upper end of material returning device, the lower end of material returning device and burner hearth sheet
Body 4 is connected to.It is designed in this way, a large amount of recycle stock in circulating fluidized bed boiler main circulation loop, has good from deashing spy
Property, water wall surface slagging can be prevented.Furnace bottom arranges heavy caliber scum pipe, effectively displaces the small slag generated in combustion process
Block and possible trouble sundries.Other compositions and connection relationship are the same as the specific implementation mode 3.
Specific embodiment 5: as shown in figures 1 to 6, present embodiment slag-draining device 3 includes scum pipe 3-1 and accident
Scum pipe 3-2, scum pipe 3-1 diameter range are 159~273mm, and accident scum pipe 3-2 diameter range is 219~325mm, thing
Therefore the bottom end of the upper end of scum pipe 3-2 and burner hearth ontology 4 is interconnected, the upper end of accident scum pipe 3-2 with burner hearth ontology 4
Bottom end is interconnected.Be designed in this way, the scum pipe of dispersion can effectively displace the lime-ash generated in combustion process and small clinker and
Possible trouble sundries；Major diameter accident scum pipe 3-2 of the invention can effectively displace the clinker generated in combustion process and with biology
Matter enters the unburned bulk impurity and sundries of burner hearth.Other compositions and connection relationship and specific embodiment one, two or four phases
Together.
Specific embodiment 6: as shown in figures 1 to 6, present embodiment biomass feeding apparatus 1 further includes the first metal
The top of feed pipe 1-2 is arranged in expansion joint 1-1, the first type metal expansion joint 1-1.It is designed in this way, it is swollen downwards to can solve boiler
Expansion and sealing when swollen between biomass feeding apparatus 1 and conveying equipment.Other compositions and connection relationship and specific embodiment
Five is identical.
Specific embodiment 7: as shown in figures 1 to 6, present embodiment feed supplementing device 2 further includes the second type metal expansion joint
The top of feed supplement pipe 2-2 is arranged in 2-1, the second type metal expansion joint 2-1.It is designed in this way, can solve benefit when boiler expands downwards
Expect the expansion and sealing between device 2 and conveying equipment.Other compositions and connection relationship and specific embodiment one, two, four or six
It is identical.
Specific embodiment 8: as shown in Figure 1, circulating fluidized bed boiler described in present embodiment further includes platform staircase
10.So set, the examination and maintenance to boiler may be implemented in platform staircase 10.Other compositions and connection relationship and specific implementation
Mode seven is identical.
Specific embodiment 9: present embodiment air preheater pipe uses horizontal arrangement as shown in Figure 1, Figure 2 and shown in Fig. 9,
Transverse pitch and longitudinal pitch are 80mm between pipe.So set, dust stratification is avoided to improve heat exchange efficiency；Air preheater final stage tube
Using ND steel or enamel tube material, low-temperature corrosion of air preheater is avoided.Other compositions and connection relationship and specific embodiment
One, two, four, six or eight are identical.
Specific embodiment 10: as depicted in figs. 1 and 2, present embodiment convection bank 34 uses in-line, parallel baffled cloth
It sets, the tube spacing of convection bank 34 is 200mm；Low temperature superheater 39 uses in-line arrangement, and the tube spacing of low temperature superheater 39 is
100mm.So set, slagging can be prevented, pipe is avoided to corrode.Other compositions and connection relationship and nine phase of specific embodiment
Together.
The course of work:
Bed material enters the lower part of burner hearth ontology 4 by feed supplementing device 2, in emulsion zone under the action of First air and igniter
Fluidisation and heating in 4-1 and dilute-phase zone 4-2, biomass enter burning in burner hearth ontology 4, biology by biomass feeding apparatus 1
Matter charging gear 1 and feed supplementing device 2 and 4 front lower portion of burner hearth ontology are welded, and the biomass lime-ash after burning passes through 4 bottom of burner hearth
Scum pipe 3-1 discharge in slag-draining device 3, big clinker and unburned impurity etc. are discharged by accident scum pipe 3-2；
Secondary air separating is two-way, and Secondary Air enters 4 lower part emulsion zone 4-2 of burner hearth ontology by lower overfire air device 5 all the way,
Burning and combustion-supporting is carried out to biomass, lime stone enters 4 lower part of burner hearth ontology by lime stone adapter tube 5-3, lime in progress furnace
Stone desulfurization；Another way Secondary Air makes biomass after-flame into 4 top emulsion zone 4-2 of burner hearth ontology through upper overfire air device 6, and lower two
Secondary wind apparatus 5, upper overfire air device 6 are arranged in 4 lower furnace emulsion zone 4-1 of burner hearth ontology, constitute isobaric wind cabin and difference
Independent air feed, convenient, flexible adjusting and precisely manipulation；
Biomass burns away in the middle part of burner hearth ontology 4, overheats with the medium temperature screen arranged in 4 dilute-phase zone 4-2 of burner hearth ontology
Device 43, high temperature screen superheater 48 exchange heat, and the cigarette ash for generation of burning is discharged from exhanst gas outlet behind 4 top of burner hearth ontology, into separation
Material-returning device 7 carries out cyclonic separation and returning charge, and flue dust is separated in separator, and big partial size dirt returns after separation through material returning device into furnace
4 lower part heating surface of thorax, burns away in burner hearth, and flue gas enters back-end ductwork by outlet through central tube；Flue gas enters boiler
It exchanges heat in back-end ductwork 8 with tail portion internal heating surface, flue gas is followed by convection bank 34, low temperature superheater 39, high-temperature economizer
17, entering air preheater 9 after low-level (stack-gas) economizer 13 exchanges heat respectively, the outlet of boiler back end ductwork 8 is connect with air preheater 9,
Flue gas exchanges heat in air preheater 9 through chopped-off head bobbin carriage 9-1 and several connection flue 9-3, bobbin carriage 9-1, and final flue gas is through final stage
Bobbin carriage 9-1 discharge；The wind interface 9-4 and several bobbin carriage 9-1 and connection case 9-2 heat exchange in air preheater 9 of first and second cold wind,
A heated hot wind enters 4 bottom of burner hearth through wind interface 9-4；Heated secondary hot-air is two-way through wind interface 9-4 points
Enter 4 lower part emulsion zone of burner hearth ontology to biomass intensified and low nitrogen burning from lower overfire air device 5 and last time wind apparatus 6, if
Soot blowing hole 9-5 between main pipe case 9-1 prevents dust stratification and corrosion by adding enough soot blowers.
Claims (10)
1. a kind of environment-friendly and energy-efficient biomass recirculating fluidized bed boiler, the circulating fluidized bed boiler include biomass feeding apparatus
(1), feed supplementing device (2), slag-draining device (3), burner hearth ontology (4), lower overfire air device (5), upper overfire air device (6), separation
Material-returning device (7), low-level (stack-gas) economizer (13), high-temperature economizer (17), convection bank (34), low temperature superheater (39) and air are pre-
Hot device (9)；It is characterized by: biomass feeding apparatus (1) includes feed pipe (1-2), the first feed pipe (1-3), the first sealing
Air hose (1-4) and annular conveying air hose (1-5), feed pipe (1-2) is vertically arranged and its lower end and the upper end feed pipe (1-3) are closed
Connection, the lower end of feed pipe (1-3) are connected to setting with the negative pressure point of burner hearth ontology (4) lower part, and the first sealing air pipe (1-4) is located at
The junction of feed pipe (1-2) and the first feed pipe (1-3), annular conveying air hose (1-5) are mounted on the first feed pipe (1-3)
On；
Feed supplementing device (2) setting is in burner hearth ontology (4) bottom and is located in the lower section of biomass feeding apparatus (1), feed supplementing device
It (2) include feed supplement pipe (2-2), the second feed pipe (2-3), the first sealing air pipe (2-4) and material seeding air hose (2-5), feed supplement pipe (2-
2) it is vertically arranged and the top airtight connection of its lower end and the second feed pipe (2-3), the first sealing air pipe (2-4) is fed with second
Manage the closed connection in upper end of (2-3), material seeding air hose (2-5) with the bottom of the second feed pipe (2-3) is closed is connected to；
Slag-draining device (3) be arranged burner hearth ontology (4) bottom end and the two be interconnected；
Upper overfire air device (6) and lower overfire air device (5) are from top to bottom successively set on the lower part of burner hearth ontology (4), and upper two
Secondary wind apparatus (6) is correspondingly arranged with charging gear (1), and lower overfire air device (5) is correspondingly arranged with feed supplementing device (2)；
Medium temperature screen superheater (43) and high temperature screen superheater (48) are from top to bottom disposed in burner hearth ontology (4) dilute-phase zone (4-2)；
Low-level (stack-gas) economizer (13), high-temperature economizer (17), convection bank (34), low temperature superheater (39) and air preheater (9)
Back-end surfaces are arranged in boiler back end ductwork (8), convection bank (34), low temperature superheater (39), high-temperature economizer (17),
Low-level (stack-gas) economizer (13) and air preheater (9) are from top to bottom sequentially arranged；
The top of the top side and burner hearth ontology (4) that separate material-returning device (7), which is interconnected, to be arranged, and is separated material-returning device (7)
Bottom and the bottom of burner hearth ontology (4) be interconnected setting, separate the top of material-returning device (7) and entering for back-end ductwork (8)
Mouth is interconnected.
2. environment-friendly and energy-efficient biomass recirculating fluidized bed boiler according to claim 1, it is characterised in that: lower Secondary Air dress
Setting (5) includes first annular isobaric wind cabin (5-1), multiple first variable cross-sections acceleration spout (5-2) and multiple lime stones adapter tube (5-
3), first annular isobaric wind cabin (5-1) is arranged on the lateral wall of burner hearth ontology (4) lower part, and multiple first variable cross-sections accelerate spray
Mouth (5-2) is uniformly arranged on the lateral wall of burner hearth ontology (4) along the circumferencial direction of burner hearth ontology (4), and the first variable cross-section accelerates
The upper end of spout (5-2) is connected to first annular isobaric wind cabin (5-1), and the first variable cross-section accelerates lower end and the furnace of spout (5-2)
Thorax ontology (4) is connected to, and a lime stone adapter tube (5-3) is connected at the variable cross-section of each first variable cross-section acceleration spout (5-2)；
Spout (5-2) is accelerated to be located above material seeding air hose (2-5) for first variable cross-section and the two is disposed adjacent.
3. environment-friendly and energy-efficient biomass recirculating fluidized bed boiler according to claim 1 or 2, it is characterised in that: upper secondary
Wind apparatus (6) includes that the second ring-shaped constant pressure wind cabin (6-1) and multiple second variable cross-sections accelerate spout (6-2), the second ring-shaped constant pressure
Wind cabin (6-1) is arranged on the lateral wall of burner hearth ontology (4) lower part, and multiple second variable cross-sections accelerate spout (6-2) along burner hearth sheet
The circumferencial direction of body (4) is uniformly arranged on the lateral wall of burner hearth ontology (4), and the second variable cross-section accelerates the upper end of spout (6-2)
It being connected to the second ring-shaped constant pressure wind cabin (6-1), the second variable cross-section accelerates the lower end of spout (6-2) to be connected to burner hearth ontology (4), the
Spout (6-2) is accelerated to be located above the first feed pipe (1-3) for two variable cross-sections and the two is disposed adjacent.
4. environment-friendly and energy-efficient biomass recirculating fluidized bed boiler according to claim 3, it is characterised in that: separation returning charge dress
Setting (7) includes separator and material returning device, and the lower end of separator is connected to the upper end of material returning device, the top side of separator and burner hearth
Ontology (4) connection, the top of separator are connected to boiler back end ductwork, and the lower end of separator is connected to the upper end of material returning device, is returned
The lower end of glassware is connected to burner hearth ontology (4).
5. environment-friendly and energy-efficient biomass recirculating fluidized bed boiler according to claim 1,2 or 4, it is characterised in that: deslagging
Device (3) includes scum pipe (3-1) and accident scum pipe (3-2), and scum pipe (3-1) diameter range is 159~273mm, accident
Scum pipe (3-2) diameter range is 219~325mm, and the upper end of accident scum pipe (3-2) and the bottom end of burner hearth ontology (4) are mutual
Connection, the lower end of accident scum pipe (3-2) is connected to the upper end of scum pipe (3-1).
6. environment-friendly and energy-efficient biomass recirculating fluidized bed boiler according to claim 5, it is characterised in that: biomass feeding
Device (1) further includes the first type metal expansion joint (1-1), and the first type metal expansion joint (1-1) is arranged on the top of feed pipe (1-2).
7. according to claim 1, environment-friendly and energy-efficient biomass recirculating fluidized bed boiler described in 2,4 or 6, it is characterised in that: mend
Material device (2) further includes the second type metal expansion joint (2-1), and the second type metal expansion joint (2-1) is arranged in the upper of feed supplement pipe (2-2)
Portion.
8. environment-friendly and energy-efficient biomass recirculating fluidized bed boiler according to claim 7, it is characterised in that: the recycle stream
Fluidized bed boiler further includes platform staircase (10).
9. according to claim 1, environment-friendly and energy-efficient biomass recirculating fluidized bed boiler described in 2,4,6 or 8, it is characterised in that:
Air preheater pipe uses horizontal arrangement, and transverse pitch and longitudinal pitch are 80mm between pipe.
10. environment-friendly and energy-efficient biomass recirculating fluidized bed boiler according to claim 9, it is characterised in that: convection bank
(34) it is arranged using in-line, parallel baffled, the tube spacing of convection bank (34) is 200mm；Low temperature superheater (39) uses in-line
Arrangement, the tube spacing of low temperature superheater (39) are 100mm.
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| CN201811549505.8A CN109506230A (en) | 2018-12-18 | 2018-12-18 | Environment-friendly and energy-efficient biomass recirculating fluidized bed boiler |
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| CN201811549505.8A CN109506230A (en) | 2018-12-18 | 2018-12-18 | Environment-friendly and energy-efficient biomass recirculating fluidized bed boiler |
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| CN110220182A (en) * | 2019-07-10 | 2019-09-10 | 哈尔滨红光锅炉总厂有限责任公司 | A kind of biomass direct-fired energy-saving circulating fluidized bed superhigh-pressure high-temp reheated steam boiler |
| CN110793013A (en) * | 2019-12-16 | 2020-02-14 | 哈尔滨红光锅炉总厂有限责任公司 | High-temperature and high-pressure steam boiler of pure-burning biomass environment-friendly circulating fluidized bed |
| CN110822394A (en) * | 2019-11-19 | 2020-02-21 | 哈尔滨锅炉厂有限责任公司 | Novel biomass direct-fired CFB boiler and combustion method |
| CN111637465A (en) * | 2020-05-29 | 2020-09-08 | 东华工程科技股份有限公司 | Treatment system and method for combustible industrial solid waste |
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| CN111637465B (en) * | 2020-05-29 | 2022-01-11 | 东华工程科技股份有限公司 | Treatment system and method for combustible industrial solid waste |
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