CN202973071U - High-low differential bed air distribution structure - Google Patents
High-low differential bed air distribution structure Download PDFInfo
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- CN202973071U CN202973071U CN 201220720712 CN201220720712U CN202973071U CN 202973071 U CN202973071 U CN 202973071U CN 201220720712 CN201220720712 CN 201220720712 CN 201220720712 U CN201220720712 U CN 201220720712U CN 202973071 U CN202973071 U CN 202973071U
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- bed
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- main bed
- bed air
- air compartment
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Abstract
The utility model discloses a high-low differential bed air distribution structure. The structure comprises a main bed, a secondary bed air chamber, a buried pipe and a partition, and is characterized in that the 300-1000mm height difference between the main bed and the secondary bed air chamber is good for the circulating of the material, and one partition is connected between the main bed and the secondary bed air chamber, a reflowing hole is formed at the lower end of the partition, and the buried pipe is arranged at the upper end of the secondary bed air chamber. The air distribution structure disclosed by the utility model has the technical effect that the fluidization of different material particle sizes are finished through the structure of the main bed and the secondary bed air chamber, and the requirement on different fluidization rate difference of the main bed and the secondary bed air chamber is satisfied, thereby realizing the circulating combustion between the main bed and the secondary bed air chamber, improving the combustion efficiency and reducing the abrasion of the buried pipe.
Description
Technical field
The utility model relates to a kind of fluidized-bed combustion boiler cloth wind structure, relates in particular to a kind of high-low bed cloth wind structure.
Background technology
The low circulation fluidized bed boiler ubiquity buried pipe abrasion with pipe laying that uses in the market is large, the problem that boiler efficiency is low, and also this class boiler is difficult to resolve the problem that the boiler pluralities of fuel of determining all is suitable for.
Chinese patent " high-low bed air distributor for coal-fired boiler " is (ZL01257282.9) (ZL200520097663.6) the cloth wind structure that my company develops greatly for solving buried pipe abrasion with patent " differential fluidized bed structure with natural circulation embedded pipe ", although yet we find that above-mentioned patent is in the wearing and tearing that greatly solve the pipe laying bottom in practice, pipe laying is still larger in end its wearing and tearing adjacent with main bed, washing away pipe laying when its wearing and tearing are main bed material and make progress fluidisation, therefore leading, arrange partition wall between secondary bed air compartment, just avoided main bed material to washing away that pipe laying directly makes progress.Owing to arranging partition wall between major and minor bed air compartment, make the interior circulation between major and minor bed air compartment more obvious simultaneously, can greatly improve particle in the time of staying of emulsion zone bed, thereby improve efficiency of combustion.
Summary of the invention
The purpose of this utility model is to provide a kind of high-low bed cloth wind structure, and it can better solve, and its buried pipe abrasion of fluidized-bed combustion boiler is large, and boiler efficiency is low, and the problems such as suitable for multiple fuel get final product energy savings, reach again environment protecting.
the utility model is achieved like this, a kind of high-low bed cloth wind structure, it comprises main bed air compartment, main bed aerofoil, secondary bed air compartment, secondary bed aerofoil, secondary bed, main bed, pipe laying, partition wall, return port, the both sides that it is characterized in that main bed air compartment are connected with secondary bed air compartment, the top of secondary bed air compartment also is provided with secondary bed by secondary bed aerofoil, the top of main bed air compartment is provided with main bed by main bed aerofoil, main bed aerofoil has 300-1000mm difference in height with secondary bed aerofoil, be connected with high approximately 700 ~ 1500mm partition wall together between main bed and secondary bed, be provided with the some return ports of quantity in the partition wall lower end, pipe laying is arranged in secondary bed.Pipe laying adopts the arranged in rows mode.
Boiler oil falls into main bed, forms 3 ~ 5m/s fluidising air velocity on main bed emulsion zone; Unburnt on main bed during boiler combustion, particle is at the fuel of 0-2mm, enter secondary bed aerofoil by upper furnace or partition wall, form 1.5 ~ 2.5m/s fluidising air velocity on secondary bed air compartment emulsion zone, particle in secondary bed air compartment conducts heat with arranging the pipe laying on it, effect due to concentration and pressure, material enters main bed by return port under partition wall, and material forms circulating combustion and heat transfer.
Technique effect of the present utility model is: the partition wall of high-low bed cloth wind structure by arranging between main bed and secondary bed air compartment, the burning of boiler is separated with heat transfer, by speed difference and the stair structure of main bed with secondary bed air compartment, complete minute bed fluidisation of different material particle diameter, satisfy the requirement poor from the different fluidization rate of secondary bed air compartment of main bed, thereby realize the circulating combustion between main bed and secondary bed air compartment, reach the raising efficiency of combustion; Again due to the existence of partition wall, avoid main bed material to washing away that pipe laying directly makes progress simultaneously, reduced the purpose of buried pipe abrasion.Structure of the present invention is applicable to the pluralities of fuels such as coal, spoil, oil shale, biomass fuel and house refuse.
Description of drawings
Fig. 1 is fundamental diagram of the present utility model.
In figure: 1, main bed air compartment 1-1, main bed aerofoil 2, secondary bed air compartment 2-1, secondary bed aerofoil 3, secondary bed 4, main bed 5, pipe laying 6, partition wall 7, return port.
The specific embodiment
As shown in Figure 1, the utility model is to realize like this, main bed air compartment 1 is provided with main bed 4, main bed aerofoil (1-1) has 300-1000mm difference in height with secondary bed aerofoil (2-1), be provided with high approximately 700 ~ 1500mm partition wall 6 together between main bed 4 and secondary bed 3, be provided with in the partition wall lower end circulation that the some return ports of quantity 7 are beneficial to material, pipe laying 5 is arranged in the top of secondary bed 3.During boiler combustion, heavy and coarse granule fuel enter main bed 4, and main bed fluidising air velocity is 3 ~ 5m/s; Lightweight and fine grained fuel enter secondary bed air compartment, and secondary bed air compartment fluidising air velocity is 1.5 ~ 2.5m/s.Unburnt on main bed, particle is at the fuel of 0-2mm, enter secondary bed 3 by top or partition wall 6 and continue after-flame, and conduct heat with arranging the pipe laying on it, due to the effect of concentration and pressure, material enters main bed 4 by return port under partition wall 7, and material forms circulating combustion and heat transfer.Main bed 4 and the layout of secondary bed 3 by the up and down discrepancy in elevation, form 3000-10000Pa static pressure difference of main bed 4 and secondary bed 3, complete minute bed fluidisation of different material particle diameter, satisfy the requirement of 1 ~ 3 times of speed difference of main bed 4 and secondary bed 3, thereby realize the circulating combustion between main bed 4 and secondary bed 3, reach the raising efficiency of combustion.Simultaneously due to the partition wall of arranging between major and minor bed air compartment, avoid main bed material to washing away that pipe laying directly makes progress, reduced the wearing and tearing of pipe laying, and the problem such as suitable for multiple fuel.
Claims (2)
1. high-low bed cloth wind structure, it comprises main bed air compartment (1), main bed aerofoil (1-1), secondary bed air compartment (2), secondary bed aerofoil (2-1), secondary bed (3), main bed (4), pipe laying (5), partition wall (6), return port (7), the both sides that it is characterized in that main bed air compartment (1) are connected with secondary bed air compartment (2), the top of secondary bed air compartment (2) also is provided with secondary bed (3) by secondary bed aerofoil (2-1), the top of main bed air compartment (1) is provided with main bed (4) by main bed aerofoil (1-1), main bed aerofoil (1-1) has 300-1000mm difference in height with secondary bed aerofoil (2-1), be connected with high one approximately 700 ~ 1500mm partition wall (6) between main bed (4) and secondary bed (3), be provided with the some return ports of quantity (7) in the partition wall lower end, pipe laying (5) is arranged in secondary bed (3).
2. high-low bed cloth wind structure according to claim 1, is characterized in that pipe laying (5) adopts the arranged in rows mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220720712 CN202973071U (en) | 2012-12-24 | 2012-12-24 | High-low differential bed air distribution structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220720712 CN202973071U (en) | 2012-12-24 | 2012-12-24 | High-low differential bed air distribution structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202973071U true CN202973071U (en) | 2013-06-05 |
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ID=48514141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220720712 Expired - Lifetime CN202973071U (en) | 2012-12-24 | 2012-12-24 | High-low differential bed air distribution structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN202973071U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105180161A (en) * | 2015-08-14 | 2015-12-23 | 东方电气集团东方锅炉股份有限公司 | Fluidized-bed boiler with multiple wind distribution plates and built-in heat exchanger |
| CN105465775A (en) * | 2016-01-01 | 2016-04-06 | 广州环峰能源科技股份有限公司 | Biomass height difference combustion chamber |
-
2012
- 2012-12-24 CN CN 201220720712 patent/CN202973071U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105180161A (en) * | 2015-08-14 | 2015-12-23 | 东方电气集团东方锅炉股份有限公司 | Fluidized-bed boiler with multiple wind distribution plates and built-in heat exchanger |
| CN105465775A (en) * | 2016-01-01 | 2016-04-06 | 广州环峰能源科技股份有限公司 | Biomass height difference combustion chamber |
| CN105465775B (en) * | 2016-01-01 | 2018-08-17 | 广州环峰能源科技股份有限公司 | A kind of biomass difference of height combustion chamber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 330001 Nanchang national high tech Industrial Development Zone, Jiangxi torch street, No. 125 Patentee after: JIANGLIAN HEAVY INDUSTRY GROUP CO.,LTD. Address before: 330001 Nanchang national high tech Industrial Development Zone, Jiangxi torch street, No. 125 Patentee before: JIANGLIAN HEAVY INDUSTRY Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20130605 |
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| CX01 | Expiry of patent term |