CN1587804A - Fluidized bed boiler combustion room with anti-abration structure - Google Patents
Fluidized bed boiler combustion room with anti-abration structure Download PDFInfo
- Publication number
- CN1587804A CN1587804A CN 200410057325 CN200410057325A CN1587804A CN 1587804 A CN1587804 A CN 1587804A CN 200410057325 CN200410057325 CN 200410057325 CN 200410057325 A CN200410057325 A CN 200410057325A CN 1587804 A CN1587804 A CN 1587804A
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- fluidized
- votex sheet
- boiler combustion
- cutting
- burner hearth
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims description 15
- 239000011819 refractory material Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 239000002184 metal Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 230000005514 two-phase flow Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention is a fluidized boiler combustion room with a grind resisting structure, which relates to a structure design of a fluidized boiler combustion room. The technology is: some turbine tangible piece are arranged in lengthwise on the connection place of the heat bearing surface between the furnace bottom fire resisting material and water cold wall; through the turbine tangible piece grind resisting structure can destroy and restrain the gas turbine on the connection position of the fire resisting material and heat bearing surface, thus it solves the affection of the changed load to the effect of grind resisting, when the decreased flow quantity and fluidized wind speed are changed, the grind resisting effect is excellent. At the same time, compared with current technology, the process is simple, convenient, and the lifespan is long.
Description
Technical field
The present invention relates to a kind of combustion apparatus, the structural design of particularly a kind of fluidized-bed combustion boiler combustion chamber.
Background technology
Common bottom, fluidized-bed combustion boiler combustion chamber is a variable cross-section, to satisfy the needs of air stage feeding and constant speed air distribution.The bottom of fluidized-bed combustion boiler is an emulsion zone, for preventing the large tracts of land wearing and tearing, needs to lay refractory material with the protection furnace heating surface on the certain altitude of bottom.Air-flow flows out upwards from air distribution plate and carries certain solid particle the flow process, and the major part in these particles can fall after rise after rising to certain altitude, and especially the granule density of near wall region falling is higher, can produce wearing and tearing at refractory material and heating surface intersection.
At present, the common practice is at refractory material 1 and the heating surface part spraying abrasion-proof alloy coating 2 more than heating surface boiler tube 3 intersections, as shown in Figure 1 in the prior art.This is a kind of passive anti-wearing method and measure.Metallic paint in the spraying is generally than the scuff resistance height of boiler steel, so that the life-span of prolonged boiler pipe.But after a period of time, the sprayed metal coating part can be worn, then the wearing and tearing of the boiler tube that comes out.It is relatively more difficult that repair welding has the cut of sprayed metal coating.In addition, because sprayed metal coating 2 has certain thickness, behind the sprayed coating of boiler tube spray metal, the spraying part will be higher than does not have the spraying part, can produce new wearing and tearing at this very little unsmooth intersection.
Another kind of typical abrasion-proof structure as shown in Figure 2, the heating surface boiler tube refractory material and more than the heating surface intersection to excurvation dx and dy, form abrasionproof bend pipe 4, so that stay free space for the whirlpool of grain flow.When this structure is stable state at grain flow,, can prevent wearing and tearing effectively according to the rational space of concrete size design of eddy current.But during operating mode off-design parameter in service, the structure of eddy current and revolution space can change, and surpass the reservation eddy current revolution space of design sometimes, therefore often occur the wearing and tearing booster in practice.
In fluidized-bed combustion boiler, the solid material that the airflow flowing that makes progress is carried, after reaching a certain height, because the stressing conditions of Gas-solid Two-phase Flow inherence, particle Xiang Bianbi district moves, and forms higher material concentration at Bian Biqu, thereby the agglomeration of particle takes place.The cluster of grains of reuniting flows downward under the effect of own wt, forms adherent sinking, at refractory material and heating surface intersection, forms the stream swirl that contains a large amount of particles, and this is to produce basic cause of wear.The physical dimension of these eddy current is directly related with the quantity of sinking, fluidising air velocity etc.If the destruction eddy current just can be restrained wearing and tearing effectively.
Summary of the invention
At problems of the prior art, the present invention proposes a kind of fluidized-bed combustion boiler combustion chamber with abrasion-proof structure, by arrange the specific votex sheet of cutting at the combustion chamber key position, fundamentally restrains wearing and tearing.
Technical scheme of the present invention is as follows:
A kind of fluidized-bed combustion boiler combustion chamber with abrasion-proof structure, it comprises the variable cross-section burner hearth bottom, described burner hearth bottom by water wall surface and on the refractory material that lays form, it is characterized in that: on the water-cooling wall tube wall of refractory material and water wall surface intersection, be provided with and cut votex sheet, this is cut votex sheet and arranges along the vertical stagger arrangement of burner hearth, one arranges puts three, and one of them is arranged on the tube hub line, and two are arranged on the pipe fin; Adjacent one arranges puts two, becomes 22～34 ° of angle symmetric arrangement respectively with the tube wall normal plane; The described votex sheet of cutting is to lack one jiao rectangular sheet.
The votex sheet of cutting of the present invention is arranged 3～7 rows along the vertical stagger arrangement of burner hearth; Each cuts votex sheet thickness is 3～5 millimeters.
The present invention is by arranging the specific votex sheet abrasion-proof structure of cutting at the combustion chamber key position, can destroy and restrain air whirl effectively in refractory material and the generation of heating surface intersection, thereby fundamentally solved the influence of load variations to the abrasionproof effect, when decline fluxion amount and fluidising air velocity variation, the abrasionproof effect is all fine.The present invention simultaneously compared with prior art also has and makes simply, and is easy to maintenance, advantages such as long service life.
Description of drawings
Fig. 1 is a kind of abrasion-proof structure (spraying abrasion-proof alloy coating) schematic diagram of existing circulating fluidized bed combustor.
Fig. 2 is another kind of abrasion-proof structure (bend pipe) schematic diagram of existing circulating fluidized bed combustor.
Fig. 3 is the votex sheet abrasion-proof structure of cutting of the present invention.
Fig. 4 is for cutting the votex sheet structural representation.
Fig. 5 is the arrangement figure (the A-A cutaway view of Fig. 3) that cuts votex sheet.
Fig. 6 is that the B of Fig. 5 is to view.
Among the figure: 1-sprayed metal coating, 2-refractory masses, 3-water screen tube, 4-abrasionproof bend pipe, 5-are cut votex sheet 6-pipe fin.
The specific embodiment
Describe the course of work of the present invention and best embodiment and embodiment in detail below in conjunction with accompanying drawing:
In fluidized-bed combustion boiler, the solid material that upwards flows and carry of air-flow, after reaching a certain height, particle Xiang Bianbi district moves and reunites.Cluster of grains is deposited to the place that begins to change, cross section, forms eddy current, causes wearing and tearing.In the zone of eddy generation, the regularly arranged votex sheet of cutting is made in weldering, and eddy current is destroyed fully, can prevent wearing and tearing effectively.According to this principle, the present invention cuts votex sheet by layout and destroys eddy current.Fig. 3 is the votex sheet abrasion-proof structure embodiment that cuts of the present invention.Bottom the burner hearth variable cross-section, weld some on the wall of the water screen tube 3 of refractory material 2 and water wall surface intersection and cut votex sheet 5.These shape and layouts of cutting votex sheet are to have certain requirements, if shape and position are improper, may add galling.The present invention adopts the rectangular sheet that lacks a jiao for cutting votex sheet, arranges that along vertical 3～7 misarrangements row of burner hearth one arranges puts three, and one of them is on the center line of pipe, and two on pipe fin 6; Another is arranged and puts two, becomes 22～34 ° of angle symmetric arrangement with the tube wall normal plane, and the thickness of cutting votex sheet 5 is generally 3～5 millimeters (shown in Fig. 5,6).Fig. 4 is of a size of for cutting votex sheet concrete structure schematic diagram: top width a=20～30mm, following width b=70～100mm, height l=250～350mm, unfilled corner gradient α=34～55 °.When downward particle sinking and the fluidisation air-flow that makes progress cross the generation eddy current at this place; according to flow feature; these of Pai Lieing are cut votex sheet it are smashed according to certain rules; become the two phase flow of steady ordered relatively uniformly; a spot of wearing and tearing occur over just the blade of cutting votex sheet, and boiler tube is well protected.
Claims (3)
1. fluidized-bed combustion boiler combustion chamber with abrasion-proof structure, it comprises the variable cross-section burner hearth bottom, described burner hearth bottom by water wall surface and on the refractory material that lays form, it is characterized in that: on the water-cooling wall tube wall of refractory material (2) and water wall surface intersection, be provided with and cut votex sheet (5), this is cut votex sheet and arranges along the vertical stagger arrangement of burner hearth, one arranges puts three, and one of them is arranged on the tube hub line, and two are arranged on the pipe fin (6); Adjacent one arranges puts two, becomes 22～34 ° of angle symmetric arrangement respectively with the tube wall normal plane; The described votex sheet of cutting is to lack one jiao rectangular sheet.
2. according to the fluidized-bed combustion boiler combustion chamber of the described band abrasion-proof structure of claim 1, it is characterized in that: the described votex sheet of cutting is arranged 3～7 rows along the vertical stagger arrangement of burner hearth; Each cuts votex sheet thickness is 3～5 millimeters.
3. according to the fluidized-bed combustion boiler combustion chamber of claim 1 or 2 described band abrasion-proof structures, it is characterized in that: the described votex sheet of cutting is of a size of: a=20～30mm, b=70～100mm, l=250～350mm, α=34～55 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410057325 CN1252412C (en) | 2004-08-27 | 2004-08-27 | Fluidized bed boiler combustion room with anti-abration structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410057325 CN1252412C (en) | 2004-08-27 | 2004-08-27 | Fluidized bed boiler combustion room with anti-abration structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1587804A true CN1587804A (en) | 2005-03-02 |
| CN1252412C CN1252412C (en) | 2006-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410057325 Expired - Fee Related CN1252412C (en) | 2004-08-27 | 2004-08-27 | Fluidized bed boiler combustion room with anti-abration structure |
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| Country | Link |
|---|---|
| CN (1) | CN1252412C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791780A (en) * | 2015-05-14 | 2015-07-22 | 哈尔滨哈锅锅炉工程技术有限公司 | Tube wall wearproof device of circulating fluidized bedboiler water wall dense phase area |
| CN106152116B (en) * | 2016-08-05 | 2019-11-22 | 华电电力科学研究院 | A kind of wear-resistance circulation fluidized bed boiler combustion chamber water-cooling wall |
-
2004
- 2004-08-27 CN CN 200410057325 patent/CN1252412C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791780A (en) * | 2015-05-14 | 2015-07-22 | 哈尔滨哈锅锅炉工程技术有限公司 | Tube wall wearproof device of circulating fluidized bedboiler water wall dense phase area |
| CN106152116B (en) * | 2016-08-05 | 2019-11-22 | 华电电力科学研究院 | A kind of wear-resistance circulation fluidized bed boiler combustion chamber water-cooling wall |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1252412C (en) | 2006-04-19 |
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