CN102901092A - Air-cooled slag discharge pipe used for small and medium size circulating fluidized bed boiler - Google Patents
Air-cooled slag discharge pipe used for small and medium size circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN102901092A CN102901092A CN 201210417210 CN201210417210A CN102901092A CN 102901092 A CN102901092 A CN 102901092A CN 201210417210 CN201210417210 CN 201210417210 CN 201210417210 A CN201210417210 A CN 201210417210A CN 102901092 A CN102901092 A CN 102901092A
- Authority
- CN
- China
- Prior art keywords
- discharge pipe
- air
- slag
- small
- fluidized bed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention discloses an air-cooled slag discharge pipe used for a small and medium size circulating fluidized bed boiler. The air-cooled slag discharge pipe used for the small and medium size circulating fluidized bed boiler comprises a slag discharge pipe main body mounted in an air chamber of a hearth, wherein the upper end of the slag discharge pipe main body is connected with an air distributing plate in the hearth; the lower end of the slag discharge pipe after stretching out of the air chamber is connected with an ash collection device; the air distributing plate is provided with multiple air caps around the sag discharge pipe main body; multiple air cap holes are arranged at the upper part of each air cap; an outer pipe is arranged at the outer part of the upper end of the slag discharge pipe main body; the outer pipe is connected with the upper end and the lower end of the slag discharge pipe main body through an upper annular plate and a lower annular plate; the lower annular plate is provided with multiple air inlet holes; and correspondingly, multiple air outlet holes are arranged on the pipe wall at the upper part of the slag discharge pipe main body. The air-cooled slag discharge pipe used for the small and medium size circulating fluidized bed boiler, disclosed by the invention, has the advantages of a simple structure, easy arrangement, low manufacturing cost, and a capability of efficiently preventing negative phenomena of deterioration of partial flow state around the slag discharge pipe.
Description
Technical field
The present invention relates to a kind of CFBB, relate in particular to a kind of air-cooled slag-discharge pipe for middle-size and small-size (below 40 tons) CFBB.
Background technology
At present, because that its unique flow dynamic characteristic of fluidized-bed combustion boiler and structure make it possess fuel tolerance is wide, efficiency of combustion is high, and load regulation range extensively waits the advantage of uniqueness.But most fluid bed is unsettled gas-solid system, wants to make its operation conditions well just must carry out rational cloth wind design to it.This point just seems and is even more important concerning medium small boiler (below 40 tons).For being easy to occur the bad phenomenon that fluidization worsens at the slag-discharge pipe periphery in the middle-size and small-size fluidized-bed combustion boiler running that adopts water-cooled dreg discharge pipe.The main cause that produces this phenomenon is that boiler is when becoming low capacity by large capacity, its air distribution plate area has also diminished accordingly, and the slag-discharge pipe specification can not become, the area that is to say the inhomogeneous fluidisation of easy generation accounts for the ratio of total air distribution plate area in increase, the fluidisation inhomogeneities is in continuous enhancing on the air distribution plate, and boiler is just more obvious when underrun.Even having affected the normal operation of boiler, this just disagrees with advantages such as the fluidized-bed combustion boiler load regulation range are wide, affects safe operation and the economic benefit of boiler when serious.
Summary of the invention
The object of the present invention is to provide a kind of air-cooled slag-discharge pipe for Small and Medium Circulating Fluidized Bed Boiler, it has simple in structure, low cost of manufacture and the characteristics that can effectively prevent the bad phenomenon generation that slag-discharge pipe periphery partial fluidization worsens.Effectively solved the problem that the slag-discharge pipe of Small and Medium Circulating Fluidized Bed Boiler exists in the prior art.
The objective of the invention is to be achieved through the following technical solutions:
A kind of air-cooled slag-discharge pipe for Small and Medium Circulating Fluidized Bed Boiler, it comprises the slag-discharge pipe body, described slag-discharge pipe body is installed in the air compartment of burner hearth, and the interior air distribution plate of its upper end and burner hearth is connected, and the lower end of described slag-discharge pipe body is connected with cinerary device after stretching out air compartment, around the slag-discharge pipe body, be provided with most blast caps on the described air distribution plate, the top of described blast cap offers a plurality of blast caps hole, wherein, the upper end outer setting of described slag-discharge pipe body has outer tube, described outer tube and slag-discharge pipe body upper, pass through upper between the lower end, lower ring plate connects, offer a plurality of fresh air inlets on the described lower ring plate, offer a plurality of exhaust vents on the tube wall corresponding to slag-discharge pipe body top.
Especially, the number of described exhaust vent and aperture are consistent with number and the aperture in blast cap hole, to guarantee the two the same resistance coefficient are arranged when passing the bed of material.
Especially, the diameter of described fresh air inlet is a bit larger tham the diameter of exhaust vent, enters the air quantity that is used for cooling between outer tube and the slag-discharge pipe body with increase.
Especially, described fresh air inlet is distributed on the lower ring plate, and is on the same circumference.
Especially, described exhaust vent is distributed in the tube wall on slag-discharge pipe body top, and is in sustained height.
Especially, described blast cap is fixedly welded on the air distribution plate.
Especially, the part that air compartment is stretched out in described air-cooled slag-discharge pipe bottom is outside equipped with seal casing, and is welded to connect with the expansion joint that is welded on the seal casing bottom.
Beneficial effect of the present invention is that described air-cooled slag-discharge pipe for Small and Medium Circulating Fluidized Bed Boiler is compared with prior art simple in structure, compact, reasonable; Can utilize the fresh air inlet that passes lower ring plate from the next cold wind that certain pressure is arranged of air compartment, make it from bottom to top constantly wash away at faster speed slag-discharge pipe body outer wall, and reduce its surface temperature, after pass again slag-discharge pipe body top exhaust vent upwards keep the velocity disturbance bed of material the same with other blast cap and adapter along the slag inside pipe wall, thereby realize the homogeneous fluidization of the whole bed of material.And have and be easy to arrange, desired location, space are little, the characteristics such as low cost of manufacture, convenient maintenance and replacement.
Description of drawings
Fig. 1 is the structural representation of the air-cooled slag-discharge pipe that is used for Small and Medium Circulating Fluidized Bed Boiler that provides of the specific embodiment of the invention 1;
Fig. 2 is the installation diagram of the air-cooled slag-discharge pipe that is used for Small and Medium Circulating Fluidized Bed Boiler that provides of the specific embodiment of the invention 1;
Fig. 3 is the top view of the air-cooled slag-discharge pipe that is used for Small and Medium Circulating Fluidized Bed Boiler that provides of the specific embodiment of the invention 1;
Fig. 4 is the structural representation of the blast cap of the air-cooled slag-discharge pipe that is used for Small and Medium Circulating Fluidized Bed Boiler that provides of the specific embodiment of the invention 1.
The specific embodiment
Further specify technical scheme of the present invention below in conjunction with accompanying drawing and by the specific embodiment.
See also Fig. 1 to shown in Figure 4, in the present embodiment, a kind of air-cooled slag-discharge pipe for Small and Medium Circulating Fluidized Bed Boiler comprises the slag-discharge pipe body 1 in the air compartment 2 that is installed on burner hearth, described air compartment 2 is by water screen tube 3 and header 4, air distribution plate 5 welding form an enclosure space, the upper end of described slag-discharge pipe body 1 and air distribution plate 5 be welded and fixed, described air distribution plate 5 is welded to connect with water screen tube 3, and the part that air compartment 2 is stretched out in the lower end of described slag-discharge pipe body 1 is outside equipped with seal casing 6, and be welded to connect with the expansion joint 7 that is welded on seal casing 6 bottoms, least significant end with put ash door 8 and be welded to connect.Around slag-discharge pipe body 1, be provided with most blast caps 9 on the described air distribution plate 5, in the adapter 10 that the lower end of described blast cap 9 connects with air compartment 2 is connected, the top of described blast cap 9 offers a plurality of blast caps hole 11, the upper end outer setting of described slag-discharge pipe body 1 has outer tube 12, are connected with lower ring plate by upper ring plate 13 between the upper and lower end of described outer tube 12 and slag-discharge pipe body 1 and are connected, offer a plurality of fresh air inlets 15 on the described lower ring plate 14, described fresh air inlet 15 is distributed on the lower ring plate 14, and is on the same circumference.Offer a plurality of exhaust vents 16 on the tube wall corresponding to slag-discharge pipe body 1 top, described exhaust vent 16 is distributed in the tube wall on slag-discharge pipe body 1 top, and is in sustained height.
The number of described exhaust vent 16 and aperture are consistent with number and the aperture in blast cap hole 11, to guarantee the two the same resistance coefficient are arranged when passing the bed of material, thereby realize the homogeneous fluidization of the whole bed of material.
The diameter of described fresh air inlet 15 is a bit larger tham the diameter of exhaust vent 16, enters the air quantity that is used for cooling between outer tube 12 and the slag-discharge pipe body 1 with increase.
During work, the cold wind of certain speed enters between slag-discharge pipe body 1 and the outer tube 12 by the fresh air inlet 15 on the lower ring plate 14, cold wind at a high speed ceaselessly washed away from bottom to top the outer wall of slag-discharge pipe body 1 and reduced its outside wall temperature this moment, because the heat conducting effect simultaneously temperature of slag has also reduced, and the cold wind after the heating passes with the exhaust vent 16 of higher speed from slag-discharge pipe body 1 top, because aperture, the variation of temperature, wind is moved upward around slag-discharge pipe body 1 inwall with more speed, with the larger energetic disturbance bed of material, penetrate the bed of material, make easily produce the zone that fluidization worsens herein can be with the uniformly fluidization of whole bed surface. prolong slag pipe service life, can be normal under the Small And Medium Capacity boiler at low load, the operation of stability and safety is for enterprise brings considerable economic benefit for country.
Above embodiment has just set forth basic principle of the present invention and characteristic; the present invention is not limited by above-mentioned example; without departing from the spirit and scope of the present invention, the present invention also has various variations and change, and these variations and change all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (7)
1. air-cooled slag-discharge pipe that is used for Small and Medium Circulating Fluidized Bed Boiler, it comprises the slag-discharge pipe body, described slag-discharge pipe body is installed in the air compartment of burner hearth, and the interior air distribution plate of its upper end and burner hearth is connected, and the lower end of described slag-discharge pipe body is connected with cinerary device after stretching out air compartment, around the slag-discharge pipe body, be provided with most blast caps on the described air distribution plate, the top of described blast cap offers a plurality of blast caps hole, it is characterized in that: the upper end outer setting of described slag-discharge pipe body has outer tube, described outer tube and slag-discharge pipe body upper, pass through upper between the lower end, lower ring plate connects, offer a plurality of fresh air inlets on the described lower ring plate, offer a plurality of exhaust vents on the tube wall corresponding to slag-discharge pipe body top.
2. the air-cooled slag-discharge pipe for Small and Medium Circulating Fluidized Bed Boiler according to claim 1; It is characterized in that: the number of described exhaust vent and aperture are consistent with number and the aperture in blast cap hole.
3. the air-cooled slag-discharge pipe for Small and Medium Circulating Fluidized Bed Boiler according to claim 1; It is characterized in that: the diameter of described fresh air inlet is greater than the diameter of exhaust vent.
4. according to claim 1 or 3 each described air-cooled slag-discharge pipes for Small and Medium Circulating Fluidized Bed Boiler; It is characterized in that: described fresh air inlet is distributed on the lower ring plate, and is on the same circumference.
5. each described air-cooled slag-discharge pipe for Small and Medium Circulating Fluidized Bed Boiler according to claim 1 and 2; It is characterized in that: described exhaust vent is distributed in the tube wall on slag-discharge pipe body top, and is in sustained height.
6. the air-cooled slag-discharge pipe for Small and Medium Circulating Fluidized Bed Boiler according to claim 1; It is characterized in that: described blast cap is fixedly welded on the air distribution plate.
7. the air-cooled slag-discharge pipe for Small and Medium Circulating Fluidized Bed Boiler according to claim 1; It is characterized in that: the part that air compartment is stretched out in described air-cooled slag-discharge pipe bottom is outside equipped with seal casing, and is welded to connect with the expansion joint that is welded on the seal casing bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210417210.1A CN102901092B (en) | 2012-10-26 | 2012-10-26 | For the air-cooled slag-discharge pipe of Small and Medium Circulating Fluidized Bed Boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210417210.1A CN102901092B (en) | 2012-10-26 | 2012-10-26 | For the air-cooled slag-discharge pipe of Small and Medium Circulating Fluidized Bed Boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102901092A true CN102901092A (en) | 2013-01-30 |
| CN102901092B CN102901092B (en) | 2016-04-13 |
Family
ID=47573479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210417210.1A Active CN102901092B (en) | 2012-10-26 | 2012-10-26 | For the air-cooled slag-discharge pipe of Small and Medium Circulating Fluidized Bed Boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102901092B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107062209A (en) * | 2017-05-22 | 2017-08-18 | 清华大学 | A kind of air-cooled deslagging device of circulating fluidized bed boiler |
| CN110986034A (en) * | 2019-12-18 | 2020-04-10 | 哈尔滨锅炉厂有限责任公司 | Novel fluidized bed boiler prevents stifled burnout and arranges sediment device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5949413A (en) * | 1982-09-13 | 1984-03-22 | Babcock Hitachi Kk | Fluidized bed burner |
| CN101311626B (en) * | 2007-05-25 | 2012-03-14 | 巴布考克及威尔考克斯公司 | Integral fluid bed ash cooler |
| CN101725967A (en) * | 2009-12-28 | 2010-06-09 | 上海锅炉厂有限公司 | Threaded connection detachable wind cap |
| CN102109167A (en) * | 2011-03-24 | 2011-06-29 | 中色奥博特铜铝业有限公司 | Slagging and fluidifying device of circulating fluidized bed boiler |
| CN202328204U (en) * | 2011-11-22 | 2012-07-11 | 济南锅炉集团有限公司 | Fluidized bed boiler slagging pipe expansion seal structure |
| CN202338900U (en) * | 2011-12-09 | 2012-07-18 | 济南锅炉集团有限公司 | Air-cooled slag discharge pipe |
| CN202973073U (en) * | 2012-10-26 | 2013-06-05 | 无锡锡能锅炉有限公司 | Air-cooled slag discharging pipe for small and medium-sized circulating fluidized bed boiler |
-
2012
- 2012-10-26 CN CN201210417210.1A patent/CN102901092B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107062209A (en) * | 2017-05-22 | 2017-08-18 | 清华大学 | A kind of air-cooled deslagging device of circulating fluidized bed boiler |
| CN110986034A (en) * | 2019-12-18 | 2020-04-10 | 哈尔滨锅炉厂有限责任公司 | Novel fluidized bed boiler prevents stifled burnout and arranges sediment device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102901092B (en) | 2016-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101598334B (en) | Bottom slag cooling method of circulating fluidized bed | |
| CN202973073U (en) | Air-cooled slag discharging pipe for small and medium-sized circulating fluidized bed boiler | |
| CN203704680U (en) | Hot air recovery device for sintered ore vertical cooling and waste heat recovery furnace | |
| CN104634134B (en) | Fluidized bed cooler, cooling means and coal hydrogenation gasification system | |
| CN102901092A (en) | Air-cooled slag discharge pipe used for small and medium size circulating fluidized bed boiler | |
| CN204474699U (en) | Liquid steel slag gas quenching residual neat recovering system | |
| CN104676617A (en) | Ash deposition resistance structure for incineration boiler flue | |
| CN203586836U (en) | Cold air supplying device for vertical cooling and waste heat recovering furnace for sintering ore | |
| CN100447487C (en) | Slag cooler for circulating fluid-bed boiler | |
| CN209161944U (en) | The coke dry quenching furnace of room is prestored with water cooling hanger and annular | |
| CN203162933U (en) | High-sulfur coal circulating fluidized bed boiler | |
| CN103113926B (en) | High-temperature synthetic gas graded chilling device and method | |
| CN103131819A (en) | Cooling structure of converting furnace oxygen lance and feed opening | |
| CN2849485Y (en) | Screened fluidized bed slag cooler | |
| CN208980646U (en) | The coke dry quenching furnace of room is prestored with water cooling support frame and annular | |
| CN103759257A (en) | Vertical type multi-cylinder slag cooler for solid-state blast furnace slag | |
| CN204514069U (en) | A kind of afterheat heat exchanger based on cement kiln head waste gas | |
| CN204629467U (en) | cap structure | |
| CN208980645U (en) | The coke dry quenching furnace of room is prestored with air-cooled hanger and annular | |
| CN109794211B (en) | High-temperature reactor and heat exchange system thereof | |
| CN207674433U (en) | Secondary high temperature sub-high pressure circulating fluidized bed boiler air distribution plate mounting structure | |
| CN108913169A (en) | The coke dry quenching furnace and its working method of room are prestored with water cooling support frame and annular | |
| CN110736371A (en) | Heat pipe system arranged at intervals of power station boilers | |
| CN205217163U (en) | Circulating fluidized bed boiler sectional type water -cooling cyclone | |
| CN201221759Y (en) | Device for cooling ash |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |