CN106196025A - Annular furnace CFBB with many separators - Google Patents
Annular furnace CFBB with many separators Download PDFInfo
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- CN106196025A CN106196025A CN201510217373.9A CN201510217373A CN106196025A CN 106196025 A CN106196025 A CN 106196025A CN 201510217373 A CN201510217373 A CN 201510217373A CN 106196025 A CN106196025 A CN 106196025A
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- burner hearth
- cyclone separator
- side wall
- gas outlet
- exhanst gas
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Abstract
A kind of annular furnace CFBB, including: burner hearth；Two groups of cyclone separator, it is separately positioned on outside two side walls, often group cyclone separator has 3 cyclone separator, the tube structure of each cyclone separator is the most identical with size, wherein: in the plane crossing all burner hearth exhanst gas outlet central points, the burner hearth exhanst gas outlet central point of outermost two separators of one group of separator, with the burner hearth exhanst gas outlet central point of outermost two separators of another group separator, about being perpendicular to the burner hearth median plane of the first side wall and being perpendicular to the joining centrosymmetry of burner hearth median plane of the second side wall；Often organizing the burner hearth exhanst gas outlet central point of outermost two separators of cyclone separator, the burner hearth centerline axis about the intersecting lens formation of the burner hearth median plane with this plane that are perpendicular to the first side wall is symmetrical；And the position relationship often organizing outermost two cyclone separator of cyclone separator meets: during b≤2m, b/3≤a ＜ b-0.3m；During b ＞ 2m, m/2≤a ＜ b-0.3m.
Description
Technical field
The present invention relates to Sector of Cfb Boilers, particularly the whirlwind of CFBB
Separator is arranged.
Background technology
Combustion technology of circulating fluidized self-application is since power field, the most always towards Large Copacity, height
The direction of parameter is developed.While CFBB capacity and parameter are amplified, in order to ensure point
From efficiency, the size of cyclone separator cannot Tong Bu with the size of burner hearth increase, and the most multiple whirlwind divide
Being arranged in parallel from device is the commonly used version of large circulating fluidized bed boiler.But many cyclonic separation
Device recirculating fluidized bed Gas-solid Two-phase Flow belongs to parallel channel multiphase flow problem, document report and actual fortune
Row result (is arranged in parallel 6 separators of 600MW boiler from 2 separators of 235MW boiler
It is arranged in parallel) all show, there is Gas-particle Flows non-uniform phenomenon between parallel cyclone separator.This is not
Uniform Flow phenomenon will cause each the Effiency of whirlwind Separator to reduce and the thermal deviation of heating surface, for
The unit of subcritical Natural Circulation, due to hydrodynamic self compensation character, typically will not cause water-cooling wall
Safety problem, but for supercritical unit, divide owing to the safety of water-cooling wall depends on heat flow density
Cloth, the safe operation of the possible serious threat of the Gas-particle Flows inhomogeneities between each loop to boiler.Therefore,
In burner hearth, between each cyclone separator, Gas-particle Flows skewness sex chromosome mosaicism is supercritical steam cycle stream
The key issue that fluidized bed boiler must be paid close attention to and solve.Solve this problem it is critical only that each whirlwind divides
From device arrangement, including the relative position between cyclone inlet flue and burner hearth and and stove thereof
The Proper Match of thorax shape and structure.
At present, the problem of gas-solid flow distribution inhomogeneities when being arranged in parallel for multiple cyclone separator,
The method generally used is to adjust cyclone inlet angle.Chinese invention patent application
201010162777.X discloses and uses axial symmetry in burner hearth both sides or about burner hearth central point
Cyclone separator is arranged in parallel technical scheme, by optimizing the cyclonic separation of large circulating fluidized bed boiler
Connection between device and burner hearth, rationally arranges position and the cyclone inlet cigarette of burner hearth exhanst gas outlet
The shape in road, the non-uniformity brought to solve multiple cyclone separator to arrange, but this side
Case is only applicable to the CFBB that upper furnace cross section is rectangle.
The recirculating fluidized bed of a kind of band water-cooled column is proposed from Chinese invention patent ZL200710151813.0
Since boiler furnace, this burner hearth has and has been placed in burner hearth centerline, extends to ceiling from air distribution plate
Water-cooled column, hearth combustion space is enclosed by burner hearth external wall, water-cooled column, ceiling and air distribution plate
Engineer applied is moved towards in the exploitation of the large circulating fluidized bed boiler become the most increasingly, and is commonly referred to as annular furnace
Thorax CFBB.Yet with the existence of water-cooled column, change gas-solid flow field distribution in burner hearth,
Especially for two separators being positioned in the middle of burner hearth both sides, affected by water-cooled column, corresponding to entrance
Furnace cross-sectional area diminish, and between two separators gas-solid circulation weaken.In upper furnace cross section
Many separators arrangement for summing up in the exploitation of the CFBB of rectangle cannot be fitted
CFBB for this structure.
Summary of the invention
It is an object of the invention to provide the annular furnace recirculating fluidized bed pot that a kind of many separators are arranged in parallel
Stove, between each separator in parallel, Gas-particle Flows is evenly distributed, and separator is high, and burner hearth is subject to
Hot side thermal deviation is little, and boiler operatiopn safety is high.
The present invention proposes a kind of annular furnace recirculating fluidized bed pot with multiple cyclone separator
Stove, including:
Burner hearth, is provided with water-cooled column in burner hearth, formed between outside wall surface and the side wall of burner hearth of water-cooled column
Annular furnace space, burner hearth has parallel to each other two the first side wall and parallel to each other two second
Side wall, the first side wall is perpendicular to the second side wall；
Two groups of cyclone separator, are separately positioned on two the first side walls, and often group cyclone separator has 3
Individual cyclone separator, each cyclone separator is constituted by gas approach and cylinder, each cyclonic separation
The tube structure of device is the most identical with size,
Wherein, in the plane crossing all burner hearth exhanst gas outlet central points:
The burner hearth exhanst gas outlet centrage that all cyclone separator are corresponding is parallel to each other；
In the burner hearth exhanst gas outlet that outermost two cyclone separator of one group of cyclone separator are corresponding
Heart point, the burner hearth flue gas corresponding with outermost two cyclone separator of another group cyclone separator goes out
Mouth central point, is perpendicular to the burner hearth median plane of two the first side walls about two planes and is perpendicular to
The joining centrosymmetry of the burner hearth median plane of two the second side walls；Often group cyclone separator is
The burner hearth exhanst gas outlet central point corresponding to two cyclone separator in outside, about being perpendicular to two first
The burner hearth centerline axis that the burner hearth median plane of side wall is formed with the intersecting lens of above-mentioned plane is symmetrical；And
The position relationship of outermost two cyclone separator often organizing cyclone separator meets with ShiShimonoseki
It is that formula limits:
During b≤2m, b/3≤a ＜ b-0.3m；
During b ＞ 2m, m/2≤a ＜ b-0.3m,
Wherein, a, b, m are respectively as follows:
A is: outermost cyclone inlet flue cross section outside on its place first side wall
Intersection point is to the distance of second side wall adjacent with this intersection point；
B is: the outside wall surface of the water-cooled column that second side wall adjacent with this intersection point is adjacent and parallel to this
The distance of the second side wall that intersection point is adjacent；
M is: the width of burner hearth exhanst gas outlet.
Alternatively, each cyclone separator is enlarging form.
Alternatively, the cross section of the structure that burner hearth side wall encloses formation is rectangle or the octagon of band corner cut.
Alternatively, the cross section of water-cooled column is rectangle or the octagon of band corner cut.
Alternatively, described first side wall is wide side wall, and described second side wall is narrow side wall.
Alternatively, two the first side walls are respectively left side wall and the right-side wall of burner hearth.
Alternatively, in the plane crossing all burner hearth exhanst gas outlet central points, cyclone separator is often organized
In be positioned at centre burner hearth exhanst gas outlet central point corresponding to cyclone separator line be perpendicular to two
The burner hearth centerline that the burner hearth median plane of individual first side wall and the intersecting lens of above-mentioned plane are formed is in same
Straight line.Alternatively, in the plane crossing all burner hearth exhanst gas outlet central points, two groups of whirlwind
Separator is positioned at the gas approach cross section of cyclone separator of centre about being perpendicular to two second
The burner hearth centerline axis that the burner hearth median plane of side wall and the intersecting lens of above-mentioned plane are formed is symmetrical.Optional
Ground, in the plane crossing all burner hearth exhanst gas outlet central points, in being positioned in two groups of cyclone separator
Between the gas approach cross section of cyclone separator be perpendicular to two the first sides about two planes
The burner hearth median plane of wall and be perpendicular to the joining center of burner hearth median plane of two the second side walls
Symmetrical.
Alternatively, in the plane crossing all burner hearth exhanst gas outlet central points, cyclone separator is often organized
In be positioned at centre burner hearth exhanst gas outlet central point corresponding to cyclone separator line with about vertical
The burner hearth centrage formed in the intersecting lens of burner hearth median plane and the above-mentioned plane of two the first side walls is not
It is in same straight line.Alternatively, in the plane crossing all burner hearth exhanst gas outlet central points, two
Group cyclone separator is positioned at the gas approach cross section of cyclone separator of centre about being perpendicular to two
The burner hearth centerline axis pair that the burner hearth median plane of individual second side wall and the intersecting lens of above-mentioned plane are formed
Claim.Alternatively, in the plane crossing all burner hearth exhanst gas outlet central points, two groups of cyclone separator
In be positioned at the gas approach cross section of cyclone separator of centre and be perpendicular to two about two planes
The burner hearth median plane of individual first side wall and be perpendicular to the phase of burner hearth median plane of two the second side walls
Intersection point centrosymmetry.
Accompanying drawing explanation
Fig. 1 is the annular furnace schematic diagram of the CFBB of the present invention.
Fig. 2 is according to one embodiment of the present of invention schematic diagram.
Fig. 3 is according to an alternative embodiment of the invention schematic diagram.
Fig. 4～6 is the principle schematic of the present invention.
Fig. 7～10 is the schematic diagram according to the embodiment of the present invention 3～6.
Detailed description of the invention
Below by embodiment, and combine accompanying drawing, technical scheme is made the most concrete
Explanation.In the description, same or analogous drawing reference numeral indicates same or analogous parts.Following
Explanation to embodiment of the present invention is intended to solve the present general inventive concept of the present invention referring to the drawings
Release, and be not construed as a kind of restriction to the present invention.
The annular furnace CFBB with many separators of the present invention, including cross section ringwise
Burner hearth and the cyclone separator of multiple parallel connection；Each cyclone separator is by gas approach and cylinder structure
Become；The tube structure of each cyclone separator is the most identical with size.
Concrete, cross section burner hearth ringwise, it is placed in burner hearth centerline, from cloth for having one
Aerofoil extends to the water-cooled column of ceiling, hearth combustion space by burner hearth external wall, water-cooled column, ceiling and
Air distribution plate encloses.As it is shown in figure 1, burner hearth external wall has cross section EFGH, water-cooled column
Have cross section I ' K ' D ' B ' L ' J ' A ' C ' (shown in figure be burner hearth external wall cross section be rectangle,
Water-cooled column cross section is octagonal situation, and burner hearth external wall cross section can also be octagon, water-cooled
Post cross section is alternatively rectangle).
In burner hearth external wall, there is wider both walls EG and FH, and narrower both walls EF and
GH.In the plane crossing all burner hearth exhanst gas outlet central points, both walls EG and the center of FH
Point line CD is a centrage of burner hearth；The central point line AB of both walls EF and GH is
Another centrage of burner hearth.Point centered by the intersection point O of centrage CD and centrage AB.It is in
The cross section of the water-cooled column in above-mentioned plane is also about burner hearth centrage AB and CD axial symmetry.
Both walls EG and FH top are respectively disposed with 3 exhanst gas outlets, each exhanst gas outlet all with
The gas approach of one cyclone separator is connected, thus constitute two groups, often group 3 cyclone separator.
In the plane crossing all burner hearth exhanst gas outlet central points, in two groups of cyclone separator one group
The burner hearth exhanst gas outlet central point that outermost two cyclone separator are corresponding, two rotations organized with another
The burner hearth exhanst gas outlet central point that wind separator is corresponding, about central point O centrosymmetry；Meanwhile,
The burner hearth exhanst gas outlet central point that outermost two cyclone separator of often organizing are corresponding, respectively about stove
Thorax centrage CD axial symmetry.Often organize outermost cyclone separator, can be that inscribe is arranged, it is possible to
Think circumscribed layout.Inscribe arranges the tangential limit IG and hypotenuse KL representing cyclone inlet flue
In, tangential limit IG is closer to centrage CD (seeing Fig. 2)；Circumscribed layout represents cyclone separator
In the tangential limit IG of gas approach and hypotenuse KL, tangential limit IG is further from burner hearth centrage CD (ginseng
See Fig. 3).
The burner hearth exhanst gas outlet centrage that all cyclone separator are corresponding is parallel to each other.
The described position relationship often organizing outermost cyclone separator meets relationship below and limits:
During b≤2m, b/3≤a ＜ b-0.3m；
During b ＞ 2m, m/2≤a ＜ b-0.3m.
Wherein, a, b, m are respectively as follows:
When inscribe is arranged, a is the hypotenuse KL of outermost cyclone inlet flue cross section IGKL
Intersection point L on its place burner hearth side wall, the distance of the burner hearth side wall EF adjacent with it；Circumscribed
During layout, a is that the tangential limit IG of outermost cyclone inlet flue cross section IGKL is at it
Intersection I on the burner hearth side wall of place, the distance of the burner hearth side wall EF adjacent with it；
B is: the burner hearth external wall EF adjacent with outermost cyclone separator is parallel with it and therewith
Distance between immediate water-cooled column wall I ' K '；
M is: the width of burner hearth exhanst gas outlet, and i.e. separator inlet flue cross section IGKL is in its institute
The width of the opening LI on burner hearth side wall.
In the present invention, as a kind of visual representation, a burner hearth exhanst gas outlet midpoint is example in accompanying drawing
Midpoint such as line segment LI.
Burner hearth external wall be rectangle or the octagon of band corner cut, water-cooled column cross section be rectangle or band
The octagon of corner cut, does not affect above-mentioned relation formula.
When cyclone inlet is enlarging form, i.e. the hypotenuse of its gas approach cross section be broken line or
During camber line, above-mentioned a is still this hypotenuse and the intersection point on the burner hearth side wall at separator place and adjacent burner hearth
The distance of side wall.
In the present invention, in the plane crossing all burner hearth exhanst gas outlet central points, outside is relative
For burner hearth centrage CD, in figure, it is inner side near the side of burner hearth centrage CD, and
Side away from burner hearth centrage CD is outside.
The principle of the present invention is:
The burner hearth exhanst gas outlet midpoint of cyclone separator 1 and 3,4 and 6 correspondence is respectively about burner hearth
Centrage CD axial symmetry, the burner hearth exhanst gas outlet midpoint of cyclone separator 1 and 4,3 and 6 correspondence
Symmetrical respectively about central point O, the Gas-particle Flows distribution that can make four cyclone separator is essentially identical.
Water-cooled column in burner hearth changes gas-solid flow field distribution in stove, two separation in the middle of burner hearth both sides
Furnace cross-sectional area corresponding to device entrance diminishes, and the gas-solid circulation between two separators weakens, because of
During the cyclone separator of this annular furnace is arranged, need most the uniformity being concerned with the two separator.
And the most significant on this impact, be the position often organizing outermost cyclone separator:
Fig. 4 shows the situation often organizing outermost cyclone separator too close to burner hearth front-back wall.With
As a example by cyclone separator 3, to the granule of cyclone separator 3 entrance motion essentially from p and t two
Direction, wherein enters cyclone separator 3 from the granule in burner hearth exterior wall EF direction along p direction, does not has
Having the collision with wall and energy loss, substantial amounts of granule enters separator；Enter to cyclone separator 2
The granule of mouth motion comes from tri-directions of f, g and h, and f and h angular separation is close to 180 °, makes
Obtain the collision between the granule of cyclone separator 2 porch more violent than 3 porch, between granule
The energy dissipation that collision causes strengthens, and reduces granule and tangentially enters cyclone inlet with air-flow
Power, causes partial particulate not enter into cyclone separator, but in burner hearth, downward sports becomes
Circulation.Above-mentioned combined factors effect so that the solid flow rate of the cyclone separator 2 being positioned at centre is obvious
Less than cyclone separator 1 and 3.
Fig. 5 is illustrated that cyclone separator 1 and 3 moves to burner hearth centerline direction, cyclone separator
The situation of certain distance is pulled open between 3 entrances and cyclone separator 1 entrance and burner hearth external wall EF, GH.
Now, come from the granule in burner hearth external wall EF, GH direction add the collision with burner hearth wall and
Friction, reduces granule and enters the momentum of cyclone separator 1 and 3 entrance, and partial particulate can form stove
Interior sinking, thus decrease the amount entering 1 and 3 cyclone separator, enter whirlwind and divide
Solid flow rate from device 1,2 and 3 tends to balance.
Fig. 6 shows that cyclone separator 1 and 3 moves to burner hearth centerline direction further, and whirlwind divides
Spacing from device 3 entrance and cyclone separator 1 entrance with burner hearth external wall EF, GH increases further
Big situation.Now, from granule and the collision of burner hearth wall in burner hearth external wall EF, GH direction
With friction aggravation, more granules form sinking in stove, along p to entering 1 and 3 cyclone separator
Amount reduces further；Meanwhile, cyclone separator 3 entrance and cyclone separator 1 entrance are big
Part, just to water-cooled column length limit wall in burner hearth, is stopped by furnace water cooling post jamb face, along t to entering 1
Also reducing with the grain amount of 3 cyclone separator.Thus the efflux of solids of centre position cyclone separator 2
Rate will be more than cyclone separator 1 and 3.
In sum, often organize outermost cyclone separator gas approach position should within the specific limits,
The material flow rate that just can make three cyclone separator of homonymy more balances, and makes the interior realization of burner hearth preferably
Flow of Goods and Materials uniformity.
Below combined Fig. 2 and Fig. 3 and illustrated embodiment 1 and 2, continued below in conjunction with accompanying drawing 7～10
Embodiment 3～6 is described.
Fig. 7～10 is the burner hearth of annular furnace CFBB and six cyclone separator are crossing
Cross-sectional view in the plane of all burner hearth exhanst gas outlet central points.In figure with single line bar represent burner hearth and
Cyclone separator elementary contour on cross-sectional view, is the internal face of flue gas circulation.These walls
The parameter such as concrete structure and thickness is unrelated with the task of the present invention, does not represent in figure.
Embodiment 3 as shown in Figure 7, six cyclone separator divide two groups to be arranged in burner hearth both sides, and six
The tube structure of individual separator is the most identical with size.Cyclone separator 1,3,4 and 6 is arranged for inscribe.
Cyclone separator 1 and 4, the corresponding burner hearth exhanst gas outlet midpoint of cyclone separator 3 and 6, respectively
About central point O centrosymmetry；Cyclone separator 1 and 3, the correspondence of cyclone separator 4 and 6
Burner hearth exhanst gas outlet midpoint, respectively about burner hearth centrage CD axial symmetry.Cyclone separator 2 and rotation
The burner hearth exhanst gas outlet midpoint of wind separator 5 correspondence is located on the same line with burner hearth centrage CD,
And the cross section of cyclone separator 2 and cyclone separator 5 gas approach is about burner hearth centrage AB axle
Symmetrical.
As a example by cyclone separator 3, illustrate that outermost two cyclone separator positions are often organized in burner hearth both sides
Put: cyclone separator 3 gas approach opening IL width on burner hearth external wall E ' G ' is m, enters
The distance of the hypotenuse KL and burner hearth external wall EF of mouth flue cross section IGKL is a, burner hearth external wall
Distance between EF and water-cooled column wall I ' K ' is b, wherein, a=b/2, and a=b-0.9m.
Embodiment 4 as shown in Figure 8, six cyclone separator divide two groups to be arranged in burner hearth both sides, and six
The tube structure of individual separator is the most identical with size.Cyclone separator 1,3,4 and 6 is circumscribed layout.
Cyclone separator 1 and 4, the corresponding burner hearth exhanst gas outlet midpoint of cyclone separator 3 and 6, respectively
About central point O centrosymmetry；Cyclone separator 1 and 3, the correspondence of cyclone separator 4 and 6
Burner hearth exhanst gas outlet midpoint, respectively about burner hearth centrage CD axial symmetry.Cyclone separator 2 and rotation
The burner hearth exhanst gas outlet midpoint of wind separator 5 correspondence and burner hearth centrage CD are not on straight line,
The cross section of cyclone separator 2 and cyclone separator 5 gas approach is about central point O centrosymmetry.
As a example by cyclone separator 3, illustrate that outermost two cyclone separator positions are often organized in burner hearth both sides
Put: cyclone separator 3 gas approach opening IL width on burner hearth external wall EG is m, entrance
The distance of the tangential limit IG and burner hearth external wall EF of flue cross section IGKL is a, burner hearth external wall
Distance between EF and water-cooled column wall I ' K ' is b, wherein a=b/2, and a=b-0.9m.
Fig. 9 is the schematic diagram of the embodiment of the present invention 5.Six cyclone separator divide two groups to be arranged in burner hearth
Both sides, the tube structure of six separators is the most identical with size.Cyclone separator 1,3,4 and 6 is
Inscribe is arranged.Cyclone separator 1 and 4, the corresponding burner hearth exhanst gas outlet of cyclone separator 3 and 6
Midpoint, respectively about central point O centrosymmetry；Cyclone separator 1 and 3, cyclone separator 4 He
The corresponding burner hearth exhanst gas outlet midpoint of 6, respectively about burner hearth centrage CD axial symmetry.Whirlwind divides
It is positioned at same with burner hearth centrage CD from the burner hearth exhanst gas outlet midpoint of device 2 and cyclone separator 5 correspondence
On straight line, and the cross section of cyclone separator 2 and cyclone separator 5 gas approach is about center
Point O centrosymmetry.
The gas approach of cyclone separator 1～6 opening on burner hearth is enlarging form, its cross section
Hypotenuse is the broken line that two straightways are constituted.As a example by cyclone separator 3, cyclone separator 3
Gas approach cross section is IGKLL ', and tangential limit is IG, and hypotenuse is that broken line KLL ', IL ' are for revolving
Wind separator 3 gas approach opening on burner hearth external wall EG.
As a example by cyclone separator 3, illustrate that side every to burner hearth is positioned at the cyclone separator position of end positions
That puts limits: cyclone separator 3 gas approach opening IL ' width on burner hearth external wall EG as m,
The hypotenuse of gas approach cross section IGKLL ' is a with the distance of burner hearth external wall EF, outside burner hearth
Distance between wall EF and water-cooled column wall I ' K ' is b, wherein: a=b/2, and a=b-0.9m.
Figure 10 is the large circulating fluidized bed boiler burner hearth of the embodiment of the present invention 6 and six cyclone separator
Top view.Six cyclone separator divide two groups to be arranged in burner hearth both sides, the cylinder knot of six separators
Structure is the most identical with size.Cyclone separator 1 is circumscribed layout, and cyclone separator 3,4 and 6 is interior
Cut layout.Cyclone separator 1 and 4, in the corresponding burner hearth exhanst gas outlet of cyclone separator 3 and 6
Point, respectively about central point O centrosymmetry；Cyclone separator 1 and 3, cyclone separator 4 and 6
Corresponding burner hearth exhanst gas outlet midpoint, respectively about burner hearth centrage CD axial symmetry.Cyclonic separation
The burner hearth exhanst gas outlet midpoint of device 2 and cyclone separator 5 correspondence is positioned at same with burner hearth centrage CD
On bar straight line, and the cross section of cyclone separator 2 and cyclone separator 5 gas approach is about in burner hearth
Heart line AB axial symmetry.
As a example by cyclone separator 1 and cyclone separator 3, illustrate that side every to burner hearth is positioned at end positions
The restriction of cyclone separator position.
Cyclone separator 3 is arranged for inscribe, and gas approach opening IL width is m, and its gas approach is horizontal
The distance of the hypotenuse KL of cross section IGKL and burner hearth external wall EF is a, and cyclone separator 1 is circumscribed
Arranging, the tangential limit of its gas approach cross section is a with the distance of burner hearth external wall GH, outside burner hearth
Distance between side wall EF and water-cooled column wall I ' K ' is b, wherein, a=b/2, and a=b-0.9m.
Above-mentioned length relation can the most suitably adjust, concrete:
During b≤2m, b/3≤a ＜ b-0.3m；
During b ＞ 2m, m/2≤a ＜ b-0.3m.
Although an embodiment of the present invention has been shown and described, for those of ordinary skill in the art
For, it is possible to understand that without departing from the principles and spirit of the present invention can be to these embodiments
Being changed, the scope of the present invention be defined by the appended.
Claims (12)
1. the annular furnace CFBB with multiple cyclone separator, including:
Burner hearth, is provided with water-cooled column in burner hearth, formed between outside wall surface and the side wall of burner hearth of water-cooled column
Annular furnace space, burner hearth includes parallel to each other two the first side wall and parallel to each other two second
Side wall, the first side wall is perpendicular to the second side wall；
Two groups of cyclone separator, are separately positioned on outside two the first side walls, often group cyclonic separation utensil
Having 3 cyclone separator, each cyclone separator is constituted by gas approach and cylinder, each whirlwind
The tube structure of separator is the most identical with size,
Wherein, in the plane crossing burner hearth all exhanst gas outlets central point: all cyclone separator pair
The burner hearth exhanst gas outlet centrage answered is parallel to each other；
The burner hearth exhanst gas outlet center that outermost two cyclone separator of one group of cyclone separator are corresponding
Point, the burner hearth exhanst gas outlet corresponding with outermost two cyclone separator of another group cyclone separator
Central point, about being perpendicular to the burner hearth median plane of two the first side walls and being perpendicular to two the second side walls
The joining centrosymmetry of burner hearth median plane the two burner hearth median plane, and often group cyclone separator is
The burner hearth exhanst gas outlet central point corresponding to two cyclone separator in outside, about being perpendicular to two first
The burner hearth centerline axis that the burner hearth median plane of side wall is formed with the intersecting lens of this plane is symmetrical；And
The position relationship of outermost two cyclone separator often organizing cyclone separator meets following relation
Formula limits:
During b≤2m, b/3≤a ＜ b-0.3m；
During b ＞ 2m, m/2≤a ＜ b-0.3m,
Wherein, a, b, m are respectively as follows:
A is: outermost cyclone inlet flue cross section outside on its place first side wall
Intersection point is to the distance of second side wall adjacent with this intersection point；
B is: the outside wall surface of the water-cooled column that second side wall adjacent with this intersection point is adjacent and parallel to this
The distance of the second side wall that intersection point is adjacent；
M is: the width of burner hearth exhanst gas outlet.
Annular furnace CFBB the most according to claim 1, wherein:
Each cyclone separator is enlarging form.
Annular furnace CFBB the most according to claim 1 and 2, wherein:
It is rectangle or the octagon of band corner cut that burner hearth side wall encloses the cross section of the structure of formation.
4. according to the annular furnace CFBB according to any one of claim 1-3,
Wherein:
The cross section of water-cooled column is rectangle or the octagon of band corner cut.
5. according to the annular furnace CFBB according to any one of claim 1-4,
Wherein:
Described first side wall is wide side wall, and described second side wall is narrow side wall.
Annular furnace CFBB the most according to claim 5, wherein:
Two the first side walls are respectively left side wall and the right-side wall of burner hearth.
7. according to the annular furnace CFBB according to any one of claim 1-6, wherein:
In the plane crossing all burner hearth exhanst gas outlet central points, during two groups of cyclone separator are positioned at
Between burner hearth exhanst gas outlet central point corresponding to cyclone separator line be perpendicular to two the first sides
The burner hearth centerline that the intersecting lens of the burner hearth median plane of wall and above-mentioned plane is formed is in same straight line.
Annular furnace CFBB the most according to claim 7, wherein:
In the plane crossing all burner hearth exhanst gas outlet central points, during two groups of cyclone separator are positioned at
Between the gas approach cross section of cyclone separator about the burner hearth center being perpendicular to two the second side walls
The burner hearth centerline axis that face is formed with the intersecting lens of above-mentioned plane is symmetrical.
Annular furnace CFBB the most according to claim 7, wherein:
In the plane crossing all burner hearth exhanst gas outlet central points, during two groups of cyclone separator are positioned at
Between the gas approach cross section of cyclone separator about the burner hearth center being perpendicular to two the first side walls
Face and be perpendicular to the joining center of burner hearth median plane the two burner hearth median plane of two the second side walls
Symmetrical.
10. according to the annular furnace CFBB according to any one of claim 1-6, its
In:
In the plane crossing all burner hearth exhanst gas outlet central points, during two groups of cyclone separator are positioned at
Between burner hearth exhanst gas outlet central point corresponding to cyclone separator line be perpendicular to two the first sides
It is straight that the burner hearth centrage that the burner hearth median plane of wall and the intersecting lens of above-mentioned plane are formed is not at same
Line.
11. annular furnace CFBBs according to claim 10, wherein:
In the plane crossing all burner hearth exhanst gas outlet central points, during two groups of cyclone separator are positioned at
Between the gas approach cross section of cyclone separator about the burner hearth center being perpendicular to two the second side walls
The burner hearth centerline axis that face is formed with the intersecting lens of above-mentioned plane is symmetrical.
12. annular furnace CFBBs according to claim 10, wherein:
In the plane crossing all burner hearth exhanst gas outlet central points, during two groups of cyclone separator are positioned at
Between the gas approach cross section of cyclone separator about the burner hearth center being perpendicular to two the first side walls
Face and be perpendicular to the joining center of burner hearth median plane the two burner hearth median plane of two the second side walls
Symmetrical.
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| CN114110575A (en) * | 2021-11-15 | 2022-03-01 | 东方电气集团东方锅炉股份有限公司 | Ultra-large circulating fluidized bed boiler |
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| CN106196025B (en) | 2018-03-23 |
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