CN109708097A - One kind is from the anti-blocking flying dust separated structure of deashing - Google Patents
One kind is from the anti-blocking flying dust separated structure of deashing Download PDFInfo
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- CN109708097A CN109708097A CN201910136424.3A CN201910136424A CN109708097A CN 109708097 A CN109708097 A CN 109708097A CN 201910136424 A CN201910136424 A CN 201910136424A CN 109708097 A CN109708097 A CN 109708097A
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- Prior art keywords
- vertical
- flue
- superheater
- ash bucket
- tube
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- 239000000428 dust Substances 0.000 title claims abstract description 44
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000003546 flue gas Substances 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 12
- 239000002356 single layer Substances 0.000 claims description 29
- 230000008676 import Effects 0.000 claims description 17
- 238000004939 coking Methods 0.000 abstract description 12
- 239000002028 Biomass Substances 0.000 abstract description 10
- 238000013517 stratification Methods 0.000 abstract description 8
- 239000004071 soot Substances 0.000 abstract description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000012528 membrane Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007665 sagging Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 241000270295 Serpentes Species 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Landscapes
- Chimneys And Flues (AREA)
Abstract
The invention discloses one kind from the anti-blocking flying dust separated structure of deashing.Including the first vertical flue that top is connected with burner hearth, the first vertical flue is connected with the lower end of the second vertical flue by ash bucket or class ash bucket structure, and superheater tube screen is arranged in the second vertical flue；The front end of either horizontal flue is connected with burner hearth, and superheater tube screen is arranged in horizontal flue；The flying dust in flue gas is stopped to make preliminary separation by being located at the vertical superheater tube in ash bucket or class ash bucket structure in superheater tube screen, since vertical superheater tube is arranged in flue using the unfixed form in lower end, the vibration generated by sweep of gases, the flying dust stopped is vibrated, prevent flying dust from being bonded on vertical superheater tube, to prevent blockage problem.The flying dust separated is discharged to outside furnace by ash bucket or class ash bucket structure, is mitigated the dust stratification in subsequent thermal face, and is cooperated soot blower, thoroughly solve biomass direct-combustion boiler superheater easily block, coking problem.
Description
Technical field
The invention belongs to biomass boiler technology fields, and in particular to a kind of flue and superheater knot of biomass boiler
Structure.
Background technique
Due to the characteristic of biomass fuel, all contain a large amount of flying dust using general in the boiler smoke of direct combustion biomass,
These flying dusts have very strong caking property, when flue gas is flowed in flue by superheater surface, due to by panel-pipe of heating surface
Blocking, the flying dust in flue gas is easy to bond on heating surface, so that heating surface contamination is exchanged heat, reduce boiler efficiency, together
When with flying dust continuous bonding, can gradually block superheater, can also to convection heating surface generate high temperature corrosion.It is general at present
Way is to increase groove profile segregator in superheater front, and increase soot blower.But flow of flue gas can be made after increasing groove profile segregator
Resistance increases, thus increase air-introduced machine power consumption, and dust stratification is easy the coking in groove profile segregator and finally blocks, inconvenience cleaning.
Summary of the invention
The problems such as present invention easily blocks for flue, superheater existing for above-mentioned existing biomass direct-combustion boiler, coking, mentions
For a kind of structurally reasonable from the anti-blocking flying dust separated structure of deashing, long-time service is not in blocking, coking phenomenon, is reduced because of product
Ash, coking and caused by be forced blowing out number, it is ensured that boiler is long-term, efficiently, safe operation, when the continuous operation of prolonged boiler
Between, the operating cost and equipment for reducing boiler are because of loss caused by start and stop.
The present invention adopts the following technical scheme that achieve the above object
One kind is from the anti-blocking flying dust separated structure of deashing, and including the fin panel casing for dividing exhaust gases passes, exhaust gases passes include
The first vertical flue that top is connected with boiler furnace, it is characterised in that: further include the second vertical flue, the first vertical flue with
The lower end of second vertical flue is connected by ash bucket or class ash bucket structure, and superheater tube screen is arranged in the second vertical flue
It is interior, superheater tube screen by multiple groups single layer snake-like tube row it is successively transversely arranged form, more mistakes in every group of single layer snake-like tube row
Heat pipe it is serpentine-like it is coil-like be arranged in the second vertical flue from top to bottom, the input end and superheater of every group of single layer snake-like tube row
Import header is connected, outlet end is connected with super-heater exit case；A pair of at least lower part is adjacent in every group of single layer snake-like tube row
2 superheater tubes extend downward into ash bucket or class ash bucket structure, be located at the first vertical flue lower part to the second vertical flue turn
The windward side of crook, it is vertical with flue gas circulating direction.
Above-mentioned one kind extends downward into every group of single layer snake-like tube row from the anti-blocking flying dust separated structure of deashing
Vertical superheater tube in ash bucket or class ash bucket structure is parallel with fin panel casing, and lower part is hanging, naturally droops, is not fixed.
One kind is from the anti-blocking flying dust separated structure of deashing, including horizontal flue, it is characterised in that: the front end of horizontal flue and pot
Furnace burner hearth is connected, and superheater tube screen is arranged in horizontal flue, and superheater tube screen is successively horizontal by the snake-like tube row of multiple groups single layer
To arranging, the serpentine-like coil-like setting of more superheater tubes in every group of single layer snake-like tube row is in horizontal flue, every group of list
The input end of layer snake-like tube row is connected with superheater import header, outlet end is connected with super-heater exit case；Every group of single layer snake
2 adjacent superheater tubes of a pair of at least first row windward side extend vertically downwards in shape pipe row, vertical with flue gas circulating direction；
The superheater tube lower disposed extended vertically downwards has ash bucket.
Above-mentioned one kind extends downwardly in every group of single layer snake-like tube row from the anti-blocking flying dust separated structure of deashing
Vertical superheater tube is vertical with horizontal flue, and lower part is hanging, naturally droops, is not fixed.
Compared with prior art, beneficial effects of the present invention:
One kind of the invention is arranged in exhaust gases passes from the anti-blocking flying dust separated structure of deashing, by being located at ash in superheater tube screen
Bucket or class ash bucket structure in vertical superheater tube the flying dust in flue gas is stopped to make preliminary separation, the vertical superheater tube by
It is arranged in flue in using the unfixed form in lower end, vibration can be generated by due to sweep of gases, flown what is stopped
Ash vibrates, and prevents flying dust from being bonded on the vertical superheater tube in ash bucket, to prevent blockage problem.It separates
Flying dust be discharged to outside furnace by ash bucket or class ash bucket structure, mitigate the dust stratification in subsequent thermal face, and cooperate the soot blowing of soot blower, it is thorough
Bottom solve biomass direct-combustion boiler superheater easily block, coking problem.
Compared with prior art, the present invention has following advantages:
1, water-cooling wall uses membrane type structure, and boiler furnace is divided into several individual exhaust gases passes, extends flue gas flow and increases
Heat exchange, while convenient for arrangement sectionalized superheater heating surface；Keep flue gas flow longer by Multi-flue arrangement, extends hot fume in pot
Residence time in furnace improves boiler efficiency, while reducing the investment of production cost of boiler；
2, superheater tube screen structure is simple, convenient for arrangement and installation；Vertical superheater tube is parallel with fin panel casing, lower part vacantly,
It naturally droops, be not fixed, may make its free wxpansion in hot situation, not will lead to and generate thermal stress in boiler operatiopn, protect
The safe operation of boiler is demonstrate,proved；
3, it is obvious to keep off grey effect, effectively improves superheater tube screen and turning dust deposit in flue problem；Especially two vertical cigarettes
The lower end in road is connected by ash bucket, further solves the problems, such as turning dust deposit in flue；
4, investment cost is few, and reduces the abrasion of superheater tube screen appearance, burn into dross, dust stratification, clogging phenomenon, entire to be
Structural reliability of uniting is high, and maintenance workload is small；Improve the stability and safety of biomass boiler operation.
Detailed description of the invention
Fig. 1 is the schematic front view of the embodiment of the present invention one.
Fig. 2 is the schematic front view of the embodiment of the present invention two.
In figure: 1- prepattern water-cooling wall, fin panel casing among 2-, fin panel casing after 3-, 4- superheater tube screen, 5- are perpendicular
To superheater tube, 6- ash bucket, 7- superheater import header, 8- super-heater exit case.
Specific embodiment
In order to clarify the technical characteristics of the invention, below by non-limiting embodiment and in conjunction with attached drawing to this hair
It is bright to be described further.
Front, rear, left and right direction of the present invention is the description carried out according to front, rear, left and right direction shown in attached drawing.For
Convenient for explanation, part related with the embodiment of the present invention is illustrated only.
Embodiment one:
It is a kind of from the anti-blocking flying dust separated structure of deashing referring to attached drawing 1, including the fin panel casing for dividing exhaust gases passes, originally
In embodiment, by left fin panel casing, right fin panel casing (not shown), prepattern water-cooling wall 1, intermediate fin panel casing
2, exhaust gases passes are divided into two vertical flues adjacent to each other by rear fin panel casing 3, and vertical flue in front is first perpendicular
To flue, top is connected with boiler furnace, and the vertical flue of back is the second vertical flue, and flue gas is by boiler furnace through in front
For first vertical flue stream to the second vertical flue of back, the lower end of the first vertical flue and the second vertical flue passes through ash bucket
6 or class ash bucket structure be connected, i.e. the turning of second vertical flue of the flue gas from the in front first vertical flue stream to back
Without transverse direction flue, directly it is connected by ash bucket 6 or class ash bucket structure, ash bucket 6 is welded using steel plate group；Class ash bucket structure
Can be 4 sides is inclined membrane wall composition, is also possible in 4 sides that surface is steel plate, surface is
Inclined membrane wall composition；Superheater tube screen 4 is arranged in the second vertical flue, and superheater tube screen 4 is snakelike by multiple groups single layer
Pipe row is successively transversely arranged to be formed, and more superheater tubes in every group of single layer snake-like tube row are serpentine-like coil-like to be arranged in from top to bottom
In second vertical flue, the input end of every group of single layer snake-like tube row is connected with superheater import header 7, outlet end and superheater go out
Mouth header 8 is connected；2 superheater tubes that a pair of every group of single layer snake-like tube row middle and lower part is adjacent are extended to vertically downwards in ash bucket 6,
It is vertical with flue gas circulating direction positioned at the first vertical flue lower part to the windward side at the second vertical flue turning.
Superheater import header 7 and super-heater exit case 8 are located at the inlet and outlet of superheater tube screen 4, according to
Superheater heat exchange need, can also super-heater exit case 8 be import, superheater import header 7 be outlet.
The vertical superheater tube 5 in ash bucket or class ash bucket structure is extended downward into every group of single layer snake-like tube row with before
Fin panel casing 1, intermediate fin panel casing 2, rear fin panel casing 3 are parallel, vertical with flue gas circulating direction；Lower part is vacantly, certainly
So it is sagging, be not fixed.Vertical superheater tube 5 belongs to a part of superheated steam process, and internal circulation medium is superheated steam.
The working principle of the present embodiment is as follows:
4 both ends of superheater tube screen are connected with superheater import header 7 and super-heater exit case 8 respectively, are fixed on intermediate membrane type
Between water-cooling wall 2 and rear fin panel casing 3, the vertical superheater tube 5 of 4 lower part of superheater tube screen is arranged in ash bucket 6, is fired by burner hearth
The flue gas generated is burnt, a large amount of flying dusts is carried and passes through by left and right sides fin panel casing and prepattern water-cooling wall 1, intermediate film-type water-cooling
The exhaust gases passes flowing that wall 2, rear fin panel casing 3 form is sent out with the vertical superheater tube 5 for being arranged in superheater tube screen 4 in ash bucket 6
Raw collision is washed away, and vertical 5 lower part of superheater tube is freely sagging, and the flying dust in flue gas is kept off due to the barrier effect of vertical superheater tube 5
Get off and be attached on vertical superheater tube 5, constantly colliding, wash away with flue gas, the lower part of vertical superheater tube 5 can generate vibration
It is dynamic, the flying dust of attachment is vibrated, ash bucket 6 is fallen into and is discharged.
The steam flow of the present embodiment are as follows: steam enters the mistake arranged using snakelike form of tubes by superheater import header 7
Hot device tube panel 4 advances into vertical superheater tube 5 flow through afterbody backhaul, is finally flowed out by super-heater exit case 8,
In flow process, heat exchange constantly occurs with the flue gas outside pipe, keeps the wall temperature of superheater tube screen 4 and vertical superheater tube 5 unlikely
Yu Taigao, is not achieved the melt temperature of flying dust, to prevent the generation of coking.
The flue gas of a large amount of flying dusts is carried by the blocking of vertical superheater tube 5, separation, most flying dust is entering superheater
It has been separated and discharged before tube panel 4, to prevent a large amount of dust stratifications of superheater tube screen 4 from even blocking, has then cooperated routine again
The soot blower of arrangement purges superheater tube screen 4, thus the thoroughly easy dust stratification of superheater in coking biomass boiler, coking
Problem.
Embodiment two:
It is a kind of from the anti-blocking flying dust separated structure of deashing, including horizontal flue, the front end of horizontal flue and Boiler Furnace referring to attached drawing 2
Thorax is connected, and superheater tube screen 4 is arranged in horizontal flue, and superheater tube screen 4 is successively lateral by the snake-like tube row of multiple groups single layer
It arranges, the serpentine-like coil-like setting of more superheater tubes in every group of single layer snake-like tube row is in horizontal flue, every group of single layer
The input end of snake-like tube row is connected with superheater import header 7, outlet end is connected with super-heater exit case 8；Every group of single layer snake
2 adjacent superheater tubes of a pair of at least first row windward side extend vertically downwards in shape pipe row, vertical with flue gas circulating direction；
The superheater tube lower disposed extended vertically downwards has ash bucket 6, and ash bucket 6 is welded using steel plate group.
Superheater import header 7 and super-heater exit case 8 are located at the inlet and outlet of superheater tube screen 4, according to
Superheater heat exchange need, can also super-heater exit case 8 be import, superheater import header 7 be outlet.
The vertical superheater tube 5 extended downwardly in every group of single layer snake-like tube row is vertical with horizontal flue, and lower part is hanging, under nature
It hangs down, be not fixed.Vertical superheater tube 5 belongs to a part of superheated steam process, and internal circulation medium is superheated steam.
The working principle of the present embodiment is as follows:
4 both ends of superheater tube screen are connected with superheater import header 7 and super-heater exit case 8 respectively, are fixed on horizontal flue
It is interior, on superheater tube screen 4, the vertical superheater tube 5 that extends downwardly be located in ash bucket 6, the flue gas generated by hearth combustion carries big
It measures flying dust to flow by horizontal flue, collides, washes away with vertical superheater tube 5, vertical 5 lower part of superheater tube is freely sagging, cigarette
Flying dust in gas comes and is attached on vertical superheater tube 5 since the barrier effect of vertical superheater tube 5 is blocked, not with flue gas
Disconnected collision is washed away, and the lower part of vertical superheater tube 5 can generate vibration, and the flying dust of attachment is vibrated, and fall into ash bucket 6 and be discharged.
The steam flow of the present embodiment are as follows: steam enters the mistake arranged using snakelike form of tubes by superheater import header 7
Hot device tube panel 4 advances into vertical superheater tube 5 flow through afterbody backhaul, is finally flowed out by super-heater exit case 8,
In flow process, heat exchange constantly occurs with the flue gas outside pipe, keeps the wall temperature of superheater tube screen 4 and vertical superheater tube 5 unlikely
Yu Taigao, is not achieved the melt temperature of flying dust, to prevent the generation of coking.
The flue gas of a large amount of flying dusts is carried by the blocking of vertical superheater tube 5, separation, most flying dust is entering superheater
It has been separated and discharged before tube panel 4, to prevent a large amount of dust stratifications of superheater tube screen 4 from even blocking, has then cooperated routine again
The soot blower of arrangement purges superheater tube screen 4, thus the thoroughly easy dust stratification of superheater in coking biomass boiler, coking
Problem.
In the description of this invention, it should be noted that term "left", "right", "front", "rear", "upper", "
Under ", "inner", the instructions such as "outside" orientation or positional relationship be to be based on the orientation or positional relationship shown in the drawings, above-mentioned term
Be merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
Unless otherwise clearly defined and limited, term " connected ", " connection " shall be understood in a broad sense, for example, it may be solid
Fixed connection, may be a detachable connection, or be integrally connected；It can be mechanical connection, can be directly connected, can also lead to
Intermediary is crossed to be indirectly connected.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Except for the technical features described in the specification, it all is technically known to those skilled in the art.
Embodiment enumerated above is not to technical solution described in the invention only for understanding that the present invention is used
Limitation, the those of ordinary skill in relation to field on the basis of the technical solution described in claim, can also make a variety of changes
Change or deformation, all equivalent variations or deformation should all be covered within the scope of the claims of the present invention.
Claims (4)
1. one kind is from the anti-blocking flying dust separated structure of deashing, including the fin panel casing for dividing exhaust gases passes, exhaust gases passes packet
Include the top is connected with boiler furnace first vertical flue, it is characterised in that: further include the second vertical flue, the first vertical flue
It is connected with the lower end of the second vertical flue by ash bucket or class ash bucket structure, superheater tube screen is arranged in the second vertical flue
It is interior, superheater tube screen by multiple groups single layer snake-like tube row it is successively transversely arranged form, more mistakes in every group of single layer snake-like tube row
Heat pipe it is serpentine-like it is coil-like be arranged in the second vertical flue from top to bottom, the input end and superheater of every group of single layer snake-like tube row
Import header is connected, outlet end is connected with super-heater exit case；A pair of at least lower part is adjacent in every group of single layer snake-like tube row
2 superheater tubes extend downward into ash bucket or class ash bucket structure, be located at the first vertical flue lower part to the second vertical flue turn
The windward side of crook, it is vertical with flue gas circulating direction.
2. a kind of from the anti-blocking flying dust separated structure of deashing, including horizontal flue, it is characterised in that: the front end of horizontal flue and boiler
Burner hearth is connected, and superheater tube screen is arranged in horizontal flue, and superheater tube screen is successively lateral by the snake-like tube row of multiple groups single layer
It arranges, the serpentine-like coil-like setting of more superheater tubes in every group of single layer snake-like tube row is in horizontal flue, every group of single layer
The input end of snake-like tube row is connected with superheater import header, outlet end is connected with super-heater exit case；Every group of single layer is snakelike
2 adjacent superheater tubes of a pair of at least first row windward side extend vertically downwards in pipe row, vertical with flue gas circulating direction；It is perpendicular
There is ash bucket to the superheater tube lower disposed extended downwardly.
3. according to claim 1 a kind of from the anti-blocking flying dust separated structure of deashing, it is characterised in that: every group of single layer
The vertical superheater tube extended downward into ash bucket or class ash bucket structure in snake-like tube row is parallel with fin panel casing, lower part is hanging,
It naturally droops, be not fixed.
4. according to claim 2 a kind of from the anti-blocking flying dust separated structure of deashing, it is characterised in that: every group of single layer
The vertical superheater tube extended downwardly in snake-like tube row is vertical with horizontal flue, and lower part is hanging, naturally droops, is not fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910136424.3A CN109708097A (en) | 2019-02-25 | 2019-02-25 | One kind is from the anti-blocking flying dust separated structure of deashing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910136424.3A CN109708097A (en) | 2019-02-25 | 2019-02-25 | One kind is from the anti-blocking flying dust separated structure of deashing |
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| Publication Number | Publication Date |
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| CN109708097A true CN109708097A (en) | 2019-05-03 |
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| CN201910136424.3A Pending CN109708097A (en) | 2019-02-25 | 2019-02-25 | One kind is from the anti-blocking flying dust separated structure of deashing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174020A (en) * | 2019-05-28 | 2019-08-27 | 山东大学 | A kind of heat exchanger of unsymmetrical arrangement |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174020A (en) * | 2019-05-28 | 2019-08-27 | 山东大学 | A kind of heat exchanger of unsymmetrical arrangement |
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