CN202973073U - Air-cooled slag discharging pipe for small and medium-sized circulating fluidized bed boiler - Google Patents
Air-cooled slag discharging pipe for small and medium-sized circulating fluidized bed boiler Download PDFInfo
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- CN202973073U CN202973073U CN 201220555557 CN201220555557U CN202973073U CN 202973073 U CN202973073 U CN 202973073U CN 201220555557 CN201220555557 CN 201220555557 CN 201220555557 U CN201220555557 U CN 201220555557U CN 202973073 U CN202973073 U CN 202973073U
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- slag
- slag discharging
- discharging pipe
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Abstract
The utility model discloses an air-cooled slag discharging pipe for a small and medium-sized circulating fluidized bed boiler. The air-cooled slag discharging pipe comprises a slag discharging pipe main body, wherein the slag discharging pipe main body is arranged in an air chamber of a furnace hearth; the upper end of the slag discharging pipe main body is connected with an air distributing plate in the furnace hearth; the lower end of the slag discharging pipe extends out of the air chamber and then is connected with an ash discharging device; a plurality of air caps, at the periphery of the slag discharging pipe main body, are arranged on the air distributing plate; a plurality of air cap holes are formed on the upper parts of the air caps; an external pipe is arranged on the outer part at the upper end of the slag discharging pipe main body; the outer pipe and the upper end and the lower end of the slag discharging pipe main body are connected by an upper annular plate and a lower annular plate; a plurality of air inlets are formed on the lower annular plate; and a plurality of air outlets are formed on the pipe wall corresponding to the upper part of the slag discharging pipe main body. The air-cooled slag discharging pipe is simple in structure, easy to arrange, low in manufacturing cost and capable of effectively preventing a bad phenomenon that the local flow state at the periphery of the slag discharging tube from is worsened.
Description
Technical field
The utility model relates to a kind of CFBB, relates 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, to make it possess fuel tolerance wide due to its unique flow dynamic characteristic of fluidized-bed combustion boiler and structure, and efficiency of combustion is high, and load regulation range extensively waits unique advantage.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 at the slag-discharge pipe periphery bad phenomenon that fluidization worsens 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, on air distribution plate, the fluidisation inhomogeneities is in continuous enhancing, and boiler is just more obvious when underrun.Even 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.
The utility model content
The purpose of this utility model is to provide a kind of air-cooled slag-discharge pipe for Small and Medium Circulating Fluidized Bed Boiler, and 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 in the prior art, the slag-discharge pipe of Small and Medium Circulating Fluidized Bed Boiler exists.
The purpose of this utility model 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 air distribution plate in 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, be provided with a plurality of blast caps on described air distribution plate around the slag-discharge pipe body, the top of described blast cap offers a plurality of blast caps holes, 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 described lower ring plate, offer a plurality of exhaust vents on 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 that the same resistance coefficient is both 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 with increase to be used for cooling air quantity between outer tube and slag-discharge pipe body.
Especially, described fresh air inlet is distributed on lower ring plate, and is on 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 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.
The beneficial effects of the utility model are 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 utility model specific embodiment 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 utility model specific embodiment 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 utility model specific embodiment 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 utility model specific embodiment 1.
The specific embodiment
Further illustrate the technical solution of the utility model 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.Be provided with a plurality of blast caps 9 on described air distribution plate 5 around slag-discharge pipe body 1, 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 described lower ring plate 14, described fresh air inlet 15 is distributed on lower ring plate 14, and is on same circumference.Offer a plurality of exhaust vents 16 on 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, guaranteeing that the same resistance coefficient is both 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 with increase to be used for cooling air quantity between outer tube 12 and slag-discharge pipe body 1.
during work, the cold wind of certain speed enters between slag-discharge pipe body 1 and outer tube 12 by the fresh air inlet 15 on 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, the temperature of slag has also reduced due to the heat conducting effect while, and the cold wind after 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 from slag-discharge pipe body 1 inwall surrounding 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 fluidization uniformly together with whole bed surface. extend slag pipe service life, can be normal under the Small And Medium Capacity boiler at low load, the operation of stability and safety, for enterprise brings considerable economic benefit for country.
Above embodiment has just set forth basic principle of the present utility model and characteristic; the utility model is not limited by above-mentioned example; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various variations and change, and these variations and change all fall in claimed the utility model scope.The claimed scope of the utility model 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 air distribution plate in 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, be provided with a plurality of blast caps on described air distribution plate around the slag-discharge pipe body, the top of described blast cap offers a plurality of blast caps holes, 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 described lower ring plate, offer a plurality of exhaust vents on 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 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 lower ring plate, and is on same circumference.
5. the 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 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 |
|---|---|---|---|
| CN 201220555557 CN202973073U (en) | 2012-10-26 | 2012-10-26 | Air-cooled slag discharging pipe for small and medium-sized circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220555557 CN202973073U (en) | 2012-10-26 | 2012-10-26 | Air-cooled slag discharging pipe for small and medium-sized circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202973073U true CN202973073U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220555557 Expired - Fee Related CN202973073U (en) | 2012-10-26 | 2012-10-26 | Air-cooled slag discharging pipe for small and medium-sized circulating fluidized bed boiler |
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| CN (1) | CN202973073U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901092B (en) * | 2012-10-26 | 2016-04-13 | 无锡锡能锅炉有限公司 | For the air-cooled slag-discharge pipe of Small and Medium Circulating Fluidized Bed Boiler |
| CN107606174A (en) * | 2017-08-16 | 2018-01-19 | 北京热华能源科技有限公司 | A kind of Expansion sealing attachment means |
| CN113432137A (en) * | 2021-05-27 | 2021-09-24 | 陈小涛 | Slag inlet pipe mechanism of roller slag cooler |
-
2012
- 2012-10-26 CN CN 201220555557 patent/CN202973073U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901092B (en) * | 2012-10-26 | 2016-04-13 | 无锡锡能锅炉有限公司 | For the air-cooled slag-discharge pipe of Small and Medium Circulating Fluidized Bed Boiler |
| CN107606174A (en) * | 2017-08-16 | 2018-01-19 | 北京热华能源科技有限公司 | A kind of Expansion sealing attachment means |
| CN107606174B (en) * | 2017-08-16 | 2019-05-07 | 北京热华能源科技有限公司 | A kind of Expansion sealing attachment device |
| CN113432137A (en) * | 2021-05-27 | 2021-09-24 | 陈小涛 | Slag inlet pipe mechanism of roller slag cooler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20161026 |