CN110043894A - A kind of quasi- eastern coal circulating fluidized bed boiler - Google Patents
A kind of quasi- eastern coal circulating fluidized bed boiler Download PDFInfo
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- CN110043894A CN110043894A CN201811252091.2A CN201811252091A CN110043894A CN 110043894 A CN110043894 A CN 110043894A CN 201811252091 A CN201811252091 A CN 201811252091A CN 110043894 A CN110043894 A CN 110043894A
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- Prior art keywords
- quasi
- backhaul
- burner hearth
- fluidized bed
- bed boiler
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- 239000003245 coal Substances 0.000 title claims abstract description 51
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 239000007789 gas Substances 0.000 claims abstract description 27
- 239000012528 membrane Substances 0.000 claims abstract description 15
- 239000000839 emulsion Substances 0.000 claims abstract description 10
- 230000008676 import Effects 0.000 claims abstract description 8
- 239000000779 smoke Substances 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 claims abstract description 3
- 238000002485 combustion reaction Methods 0.000 claims description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 15
- 239000003546 flue gas Substances 0.000 claims description 15
- 235000019504 cigarettes Nutrition 0.000 claims description 10
- 238000013517 stratification Methods 0.000 abstract description 8
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000005530 etching Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 15
- 239000000428 dust Substances 0.000 description 8
- 239000002956 ash Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000011044 inertial separation Methods 0.000 description 4
- 210000000038 chest Anatomy 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 229910052728 basic metal Inorganic materials 0.000 description 2
- 150000003818 basic metals Chemical class 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 238000009841 combustion method Methods 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- -1 bonding Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000001535 kindling effect Effects 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/02—Arrangements of regenerators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The present invention provides a kind of quasi- eastern coal circulating fluidized bed boiler.Heating surface includes pipe laying and membrane wall, burner hearth includes three backhaul exhaust gases passes, the section in the channel includes front, rear, left and right and intermediate membrane wall, shape is same or similar with " day ", " saying " word, the first backhaul and the second backhaul, the second backhaul and third return between constitute " u "-shaped exhaust gases passes；Configure Secondary Air；Burner hearth peripheral hardware cyclone separator；Tail vertical well gas flue convection heating surface is coarse pitch in-line arrangement, and the fluidizing velocity of the emulsion zone of burner hearth is 3-4m/s, and ignition temperature is at 850~900 DEG C；Tail vertical well convection heating surface import smoke temperature is at 400 DEG C -600 DEG C.Dust stratification, slagging, the etching problem that the quasi- eastern coal in burning in circulating fluid bed boiler Xinjiang can be well solved, guarantee the reliability of boiler continuous operation.
Description
Technical field
The present invention relates to a kind of boiler, especially a kind of quasi- eastern coal circulating fluidized bed boiler.
Background technique
The coal quality of the Xinjiang Coal Mine Area Zhun Dong has the following characteristics that (1) higher moisture；(2) medium calorific capacity；(3) coal quality
Bulk density is small；(4) easily kindling, easy to burn out；(5) strong coking；(6) high basic metal content, strong contamination；(7) ash of each mine is molten
Point difference is bigger.It is coking, stains and because caused by contamination currently, restricts quasi- east coal and being applied to the maximum factor of boiler
Dust stratification.And the principal element of this problem is caused still to be coal-fired characteristic itself, and high basic metal content in components of coal ash
It is the maximum reason for causing boiler scaling, contamination and dust stratification.
In the boiler with the quasi- eastern coal in combustion Xinjiang, all there is similar problem.The east that soot blower stains heating surface above
West purging does not fall, and boiler scaling, back-end surfaces slagging, booster, high temperature corrosion are serious, uses or mix this height of the eastern coal of standard of burning
Slagging fouling characteristics have seriously affected boiler safety normal operation.Therefore solving ash accumulation and slagging problem is the quasi- eastern coal of burning
Key.
Summary of the invention
The object of the present invention is to provide a kind of quasi- eastern coal circulating fluidized bed boiler.
Implement the technical scheme adopted by the invention is that, heating surface includes pipe laying and membrane wall, and burner hearth includes three return smokes
Gas channel, the section in the channel include front, rear, left and right and intermediate membrane wall, shape it is identical as " day ", " saying " word or
It is similar, the first backhaul and the second backhaul, the second backhaul and third return between constitute " u "-shaped exhaust gases passes；Configure Secondary Air；Furnace
Thorax peripheral hardware cyclone separator；Tail vertical well gas flue convection heating surface is coarse pitch in-line arrangement, and the coarse pitch refers to economizer
Transverse pipe row between clearance >=48mm, longitudinal pipe row between clearance >=43mm；The fluidisation speed of the emulsion zone of burner hearth
Degree is 3-4m/s, and ignition temperature is at 850~900 DEG C；Tail vertical well convection heating surface import smoke temperature is at 400 DEG C -600 DEG C.
Further, pipe laying, which is set up defences, grinds fin, tilt angle >=15 ° of pipe laying, and the first backhaul upper furnace membrane wall is heated
Combustion with is defended in face laying, controls combustion temperature in hearth with the height for defending combustion with.
Further, tail vertical well convection heating surface import smoke temperature is at 400 DEG C -530 DEG C.
Further, burner hearth length-width ratio is 1.5-2.5.
Further, the cigarette speed > third backhaul exhaust gases passes of cigarette speed > the first backhaul exhaust gases passes of the second backhaul exhaust gases passes
Cigarette speed；" u "-shaped exhaust gases passes angle of elevation >=50 °.
Further, First air is heated with air preheater and is sent into air compartment, and Secondary Air is room temperature wind, is directly entered burner hearth, furnace
Thorax front wall single layer arrangement, speed >=70m/s of Secondary Air, every secondary air channel are equipped with independent adjusting door, economizer flue gas speed
Degree is 6-9m/s.
Further, the close phase zone of positive pressure of burner hearth pipe laying at least sets 2 coal dropping ports, and has coal spread wind and defeated coal wind anti-clogging coal.
Further, 500 DEG C -750 DEG C of membrane wall dilute-phase zone ignition temperature, 400 DEG C -530 DEG C of cyclone inlet temperature.
Further, First air accounts for the 60%-80% of total blast volume, and Secondary Air accounts for the 20%-40% of total blast volume, and blower surplus is 20%-
25%。
The beneficial effects of the present invention are can well solve the product of the quasi- eastern coal in burning in circulating fluid bed boiler Xinjiang
Ash, slagging, etching problem guarantee the reliability of boiler continuous operation.It is using the quasi- eastern coal in burning in circulating fluid bed boiler Xinjiang
The type of furnace being well suited for, not only energy saving but also environmentally friendly, operating cost is low.
(1) burner hearth adds membrane wall combined type heat transfer structure using pipe laying, and reasonable Arrangement heating surface guarantees tail vertical well convection current
Heating surface import fibre selection is at 530 DEG C hereinafter, preventing tail portion convection heating surface dust stratification bonding, slagging, corrosion.
(2) tail vertical well gas flue convection heating surface uses coarse pitch in-line arrangement, prevents dust stratification from putting up a bridge.
(3) since quasi- eastern ash content of coal is seldom, using pipe laying low circulation multiplying power combustion method, boiler does not need to add many stones
Sand can meet normal operation.
(4) burner hearth uses three return structures, extends burning residence time of the particle in furnace, enough heating surface areas,
Make tail vertical well convection heating surface import fibre selection at 400 DEG C -600 DEG C.
(5) lower ignition temperature is used, keeps burner hearth emulsion zone ignition temperature in 850-900 DEG C or so range, and close
Reason configuration Secondary Air, controls excess air coefficient, creates good low nitrogen burning condition to fine grained.
(6) using burner hearth inertial separation and the outer medium temperature cyclone separator of furnace, guarantee the multiple circulating combustion for not burning particle,
The thermal efficiency is improved as far as possible.
(7) emulsion zone uses low fluidizing velocity 3-4m/s, reduces abrasion.
(8) it is conducted heat using pipe laying, improves heat transfer coefficient, reduce fin panel casing heating surface area, reduce boiler overall steel consumption.
Contain a large amount of material in burner hearth, a large amount of material is carried to upper furnace by flue gas in combustion, passes through
It is arranged in the separator of furnace outlet, material and flue gas are separated, and by non-mechanical feeding-back valve by loopback of material to bed,
Multiple circulating combustion.Due to material concentration height, there is very big thermal capacity and good material to mix, general per kilogram flue gas can
Several kilograms of material is carried, these recycle stocks bring high heat transfer coefficient, keep boiler heat load adjustable range wide, to fuel
It is adaptable.
Circulating fluidized bed boiler running temperature is between 850-900 DEG C, this is an ideal desulfurization temperature section, using furnace
Desulfurizing agent (such as lime stone) is added into bed in inner desulfurization technology, and fuel and desulfurizing agent are repeatedly recycled, and low-temperature burning is repeated
And desulphurization reaction, turbulent motion is violent in furnace in addition, and the discharge amount of SO2 substantially reduces.Recirculating fluidized bed is using low temperature point simultaneously
Grade air-supply burning, carries out burning under low excess air always, thus greatly reduces the generation and discharge of NOX.Recycle stream
Fluidized bed boiler also has high efficiency of combustion, can use that inferior fuel, boiler load modulability be good, lime-ash is easy to comprehensively utilize
The advantages that, therefore worldwide rapidly developed.
Due to the particularity of the quasi- eastern coal in Xinjiang, ash accumulation and slagging problem is mainly solved.By experimental studies have found that quasi- east
For coal in 530 DEG C of smoke temperatures below, tail portion convection heating surface basically will not produce dust deposition.
Since quasi- eastern ash content of coal is seldom, using pipe laying low circulation multiplying power combustion method, boiler does not need to add many quartz
Sand can meet normal operation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
Specific embodiment
Referring to Fig. 1, the length-width ratio of burner hearth 5 is 1.5-2.5, and drum 7 is arranged in 5 top of burner hearth, configures Secondary Air；Heating surface
It is combined with pipe laying 3 plus membrane wall 6, pipe laying welds abrasionproof fin, and tilt angle >=15 ° of pipe laying, the close phase of 5 pipe laying of burner hearth is just
Pressure area has 2 coal dropping ports, there is coal spread wind and defeated coal wind anti-clogging coal.Three return structures of burner hearth include front, rear, left and right and centre
Two pieces of light pipe membrane wall heating surfaces, i.e. section are same or similar with " day ", " saying " font, constitute three backhaul exhaust gases passes, the
One backhaul and the second backhaul, the second backhaul and third constitute " u "-shaped exhaust gases passes between returning, meanwhile, particle is also extended in furnace
The interior burning residence time.Combustion with is defended in the laying of first backhaul upper furnace membrane wall heating surface, controls furnace with the height for defending combustion with
Thorax ignition temperature.The cigarette of the cigarette speed > third backhaul exhaust gases passes of cigarette speed > the first backhaul exhaust gases passes of second backhaul exhaust gases passes
Speed；" u "-shaped exhaust gases passes angle of elevation >=50 °.
It is inertial separation in burner hearth, uses medium temperature cyclone separator 8 after flake hearth-tapping.High-pressure blast 14 is from exhanst gas outlet 15
Place enters air compartment 1 by air preheater 12, sets material returning device 13 below the second backhaul and third backhaul.
2 ignition temperature of emulsion zone of burner hearth 5 at 850~900 DEG C, membrane wall dilute-phase zone low-temperature burning temperature 500 DEG C-
Between 750 DEG C, furnace exit temperature is reduced as early as possible, guarantees that cyclone inlet temperature between 400 DEG C -530 DEG C, prevents from tying
Slag, bonding, dust stratification, corrosion.10 convection heating surface import of tail vertical well, 9 fibre selection at 400 DEG C -600 DEG C, preferably 400 DEG C -
530 DEG C, prevent 11 dust stratification bonding of tail portion convection heating surface, slagging, corrosion.The fluidizing velocity of emulsion zone 2 is 3-4m/s.
10 convection heating surface of tail vertical well gas flue use coarse pitch in-line arrangement, transverse pipe row between clearance >=
48mm, longitudinal pipe row between clearance >=43mm；Prevent dust stratification from putting up a bridge.
Reasonable disposition Secondary Air, control excess air coefficient, keep burner hearth emulsion zone ignition temperature 850~900 DEG C compared with
Good low nitrogen burning condition is created to fine grained in low section.First air is heated with air preheater and is sent into air compartment, and Secondary Air is
Room temperature wind is directly entered burner hearth 5, and 5 front wall single layer of burner hearth arrangement, speed >=70m/s of Secondary Air, every secondary air channel is equipped with only
Vertical adjusting door, economizer velocity of flue gas are 6-9m/s.First air accounts for the 60%-80% of total blast volume, and Secondary Air accounts for total blast volume
20%-40%, blower surplus are 20%-25%.Burner hearth inertial separation and the outer medium temperature cyclone separator of furnace, guarantee do not burn the more of particle
Secondary circulating combustion, as far as possible the raising thermal efficiency.Emulsion zone 2 uses low fluidizing velocity 3-4m/s, reduces abrasion.It is passed using pipe laying
Heat improves heat transfer coefficient, reduces fin panel casing heating surface area, reduces boiler overall steel consumption.
Quasi- east coal belongs to high volatile lignite, and bulk density is less than other coals, and air distribution plate resistance is small, therefore phase can be selected
An air blower, about 11000Pa low to wind pressure.Secondary air fan is entered the wind using multilayer multiple spot, wind pressure 8000Pa.Because of circulating ratio
Low, returning charge ash quantity is few, so returning charge elegance First air booster fan.
In view of the monopolizing characteristic of quasi- eastern coal, avoid combustion bulky grain and the excessive coal of little particle, with coal partial size be no more than
12mm, average grain 6-8mm, and ratio of the partial size less than 1mm is not more than 10%.The method that secondary screen point is crushed using level-one, the
It sieves together, vibrating inclined coal double-edged fine-toothed comb is arranged in raw coal field coal scuttle, and 100 × 100mm of comb hole prevents bulk stone from entering coal handling system.
Screen out coarse coal to go successively to level-one broken.Crusher is four toothed roll crushers, is rotated towards each other in machine equipped with two Duis
Thick, thin two-stage is crushed and merges, the bulk materials of 300~500mm are entered crusher together, are crushed to 8- by discaling roll
13mm；Second screening, using the high-amplitude dusting cover extension set of resistance to high-moisture, amplitude 20mm or more is mounted on thin coal breaker entrance, sieve
Hole 15 × 15mm or 12 × 12mm.
Burning and the distinguished and admirable journey of cigarette: First air enters burner hearth, Secondary Air after air preheater heats, through air compartment air distribution plate
Enter burner hearth by overfiren air port, the flue gas after wind coal is mixed and burned burns in burner hearth emulsion zone first.Carry solids
After flue gas leaves one backhaul of burner hearth, is separated by the U-typed inertial separation flue level-one between two or three backhaul of burner hearth, enter back into rotation
Wind separator the second-order separation.Coarse granule is separated from flue gas, is sent into burner hearth circulating combustion by material-returning device.And flue gas stream
Tail vertical well gas flue is then entered by central cylinder of separator, after flue gas is cooled down by convection heating surfaces such as economizer, air preheaters,
Into the fine grained composition of deduster removal flue gas, and by desulphurization plant desulfurization, finally, being sent into chimney by air-introduced machine, side by side
Enter atmosphere.
Contain a large amount of material in burner hearth, a large amount of material is carried to upper furnace by flue gas in combustion, passes through
It is arranged in the separator of furnace outlet, material and flue gas are separated, and by non-mechanical feeding-back valve by loopback of material to bed,
Multiple circulating combustion.Due to material concentration height, there is very big thermal capacity and good mixed characteristic, general per kilogram flue gas can
The more materials of weight are carried, these recycle stocks bring high heat transfer effect, keep boiler heat load adjustable range wide.
Claims (9)
1. a kind of quasi- eastern coal circulating fluidized bed boiler, which is characterized in that heating surface includes pipe laying and membrane wall, and burner hearth includes three times
Journey exhaust gases passes, the section in the channel include front, rear, left and right and intermediate membrane wall, and shape is identical as " day ", " saying " word
Or it is similar, the first backhaul and the second backhaul, the second backhaul and third return between constitute " u "-shaped exhaust gases passes；It configures secondary
Wind；Burner hearth peripheral hardware cyclone separator；Tail vertical well gas flue convection heating surface is coarse pitch in-line arrangement, and the coarse pitch refers to
Economizer transverse pipe row between clearance >=48mm, longitudinal pipe row between clearance >=43mm；The emulsion zone of burner hearth
Fluidizing velocity is 3-4m/s, and ignition temperature is at 850~900 DEG C；Tail vertical well convection heating surface import smoke temperature is at 400 DEG C -600
℃。
2. a kind of quasi- eastern coal circulating fluidized bed boiler according to claim 1, which is characterized in that pipe laying, which is set up defences, grinds fin,
Combustion with is defended in the first backhaul of tilt angle >=15 ° upper furnace membrane wall heating surface laying of pipe laying, is controlled with the height for defending combustion with
Combustion temperature in hearth.
3. a kind of quasi- eastern coal circulating fluidized bed boiler according to claim 1, which is characterized in that tail vertical well convection current is heated
Import smoke temperature in face is at 400 DEG C -530 DEG C.
4. a kind of quasi- eastern coal circulating fluidized bed boiler according to claim 1, which is characterized in that burner hearth length-width ratio is 1.5-
2.5。
5. a kind of quasi- eastern coal circulating fluidized bed boiler according to claim 1, which is characterized in that the second backhaul exhaust gases passes
Cigarette speed > the first backhaul exhaust gases passes cigarette speed > third backhaul exhaust gases passes cigarette speed；" u "-shaped exhaust gases passes angle of elevation >=
50°。
6. a kind of quasi- eastern coal circulating fluidized bed boiler according to claim 1, which is characterized in that First air air preheat
Air compartment is sent into device heating, and Secondary Air is room temperature wind, is directly entered burner hearth, speed >=70m/s of Secondary Air, and every secondary air channel is set
There is independent adjusting door, economizer velocity of flue gas is 6-9m/s.
7. a kind of quasi- eastern coal circulating fluidized bed boiler according to claim 1, which is characterized in that the close phase positive pressure of burner hearth pipe laying
Area at least sets 2 coal dropping ports, and has coal spread wind and defeated coal wind anti-clogging coal.
8. a kind of quasi- eastern coal circulating fluidized bed boiler according to claim 1, which is characterized in that the burning of membrane wall dilute-phase zone
500 DEG C -750 DEG C of temperature, 400 DEG C -530 DEG C of cyclone inlet temperature.
9. a kind of quasi- eastern coal circulating fluidized bed boiler according to claim 1, which is characterized in that First air accounts for total blast volume
60%-80%, Secondary Air account for the 20%-40% of total blast volume, and blower surplus is 20%-25%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2017110161126 | 2017-10-27 | ||
| CN201711016112.6A CN107631293A (en) | 2017-10-27 | 2017-10-27 | A kind of CFBB |
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| CN201811252091.2A Pending CN110043894A (en) | 2017-10-27 | 2018-10-25 | A kind of quasi- eastern coal circulating fluidized bed boiler |
| CN201811252092.7A Pending CN110043895A (en) | 2017-10-27 | 2018-10-25 | A kind of quasi- eastern coal circulating fluidized bed boiler and its control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110715444A (en) * | 2019-10-29 | 2020-01-21 | 辽宁绿源能源环保科技集团有限责任公司 | Graded water return grate firing boiler system |
| CN112555817A (en) * | 2020-12-15 | 2021-03-26 | 江苏兴特嘉环保设备制造有限公司 | Boiler combustion system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107631293A (en) * | 2017-10-27 | 2018-01-26 | 湘潭锅炉有限责任公司 | A kind of CFBB |
| CN109028045A (en) * | 2018-06-12 | 2018-12-18 | 中蓝长化工程科技有限公司 | The anti-high sodium coal combustion of one kind stains circulating fluidized bed boiler and releasing pollution discharge treatment method |
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| CN103398371A (en) * | 2013-07-01 | 2013-11-20 | 中国华能集团清洁能源技术研究院有限公司 | Double-low type boiler burning high base metal coal |
| CN204420992U (en) * | 2014-10-31 | 2015-06-24 | 长沙联新能源环保工程设计有限公司 | Biomass direct-fired speed change mixing circulation fluidized-bed combustion boiler |
| CN204922956U (en) * | 2015-05-04 | 2015-12-30 | 湖南润丰能源科技发展有限公司 | Circulating fluidized bed boiler of burning offal |
| CN206410126U (en) * | 2017-01-12 | 2017-08-15 | 唐山信德锅炉集团有限公司 | Middle temperature separating circulating fluidized bed boiler for the high sodium coal that burns |
| CN106979514A (en) * | 2017-05-27 | 2017-07-25 | 贵州新能源开发投资股份有限公司 | A kind of sunken bed ballast group fluid bed and its application method for using super-low calorific value fuel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110715444A (en) * | 2019-10-29 | 2020-01-21 | 辽宁绿源能源环保科技集团有限责任公司 | Graded water return grate firing boiler system |
| CN110715444B (en) * | 2019-10-29 | 2021-08-10 | 辽宁绿源能源环保科技集团有限责任公司 | Graded water return grate firing boiler system |
| CN112555817A (en) * | 2020-12-15 | 2021-03-26 | 江苏兴特嘉环保设备制造有限公司 | Boiler combustion system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110043895A (en) | 2019-07-23 |
| CN107631293A (en) | 2018-01-26 |
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