CN204478032U - Central cylinder for circulating fluidized-bed boiler - Google Patents
Central cylinder for circulating fluidized-bed boiler Download PDFInfo
- Publication number
- CN204478032U CN204478032U CN201420809601.2U CN201420809601U CN204478032U CN 204478032 U CN204478032 U CN 204478032U CN 201420809601 U CN201420809601 U CN 201420809601U CN 204478032 U CN204478032 U CN 204478032U
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- CN
- China
- Prior art keywords
- central tube
- separator
- circulating fluidized
- bed boiler
- straight section
- 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.)
- Expired - Fee Related
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- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model discloses a kind of central cylinder for circulating fluidized-bed boiler.It comprises a body, is characterized in that the upper diameter of a body is greater than its underpart diameter, and the upper end circumference of cylinder body has for being hung the outer chimb in separator.This central tube, not easily tilts, comes off, long service life.Adopt this central tube, the separative efficiency of separator can be improved.Be applicable on the separator of CFBB.
Description
Technical field
The utility model relates to a kind of fluidized-bed combustion boiler.Specifically, be the separator central tube of CFBB.
Background technology
All know in boiler for producing industry, the central tube for improving separator ash separative efficiency is all installed at the Membrane Separator Cylinder for CFB Boiler top of CFBB.Traditional central tube is straight tube, and namely its top and the bottom external diameter is equal.Because this central tube is straight tube, following two kinds of supporting way during installation, need be adopted:
One is strip steel plate formula supporting form.This supporting form is the circumference being distributed on central tube with the diameter of 8 ~ 16 strip steel plates centrally cylinder, first one end of strip steel plate is welded on the upper end of central tube, is then cast in refractory concrete furnace wall together with central tube upper end by strip steel plate.There is following problem in this supporting form, one is because central tube upper end is cast in furnace wall, and the thermal expansion under hot, can be subject to the extruding of furnace wall, and produce shear stress and occur crackle, service life is not long.Two is be welded to connect owing to adopting between strip steel plate and central tube, higher to welding requirements, if wlding and welding procedure are grasped bad, the weld seam of strip steel plate and central tube can in hot lower disconnection, thus cause central tube to tilt even to come off.
Another kind is housing supports form.This form is first at the welding of central tube upper end circumferencial direction 8 ~ 16 round steel, the axis of these round steel and the vertical vertical of central tube.8 ~ 16 pipes are used to be fixed on casing frame again.During installation, the outer end of 8 ~ 16 round steel is inserted in the corresponding pipe on casing frame correspondingly.Central tube upper end wherein, round steel and pipe are all built by laying bricks or stones in furnace wall.When boiler thermal-state runs, being radially expanded that central tube produces is carried out in pipe.This supporting form, mainly in order to solve the expansion issues of central tube.Although adopt this supporting form can overcome the demi-inflation problem of central tube, but still have the following disadvantages: one is because central tube upper end, round steel and pipe are all built by laying bricks or stones in furnace wall, central tube and pipe will bear the moiety by weight of furnace wall, the expansion of central tube is affected, after being subject to the extruding of furnace wall, can shear stress be produced and occur crackle, like this, also can shorten the service life of central tube; Two be to the wlding welded between pipe with casing frame and technological requirement higher, if grasp bad, also can because weld seam disconnect and cause central tube to tilt.
In addition, adopt above two kinds of supporting forms, be difficult to insertion depth and the position of determining central tube, central tube easily fills partially or tilts, thus has influence on the flow direction of air-flow, adds dust secondary droplets rate in the gas flow, reduces the separative efficiency of separator.
Utility model content
Problem to be solved in the utility model is to provide a kind of central cylinder for circulating fluidized-bed boiler.This central tube, not easily tilts, comes off, long service life.Adopt this central tube, the separative efficiency of separator can be improved.
The problems referred to above to be solved in the utility model are realized by following technical scheme:
Central cylinder for circulating fluidized-bed boiler of the present utility model comprises a body, is characterized in that the upper diameter of a body is greater than its underpart diameter, and the upper end circumference of cylinder body has for being hung the outer chimb in separator.
Wherein, described cylinder body has upper straight section, cone section and lower straight section from top to bottom successively, the length of described upper straight section and the centre bore height adaptation at separator top.
Further improvement of the utility model scheme is, described lower straight section cylindrical has reinforcing annular muscle, and the external diameter of described reinforcing annular muscle is less than the external diameter of upper straight section.
As can be seen from the above scheme, the upper diameter due to cylinder body is greater than its underpart diameter, and the upper end circumference of cylinder body has for being hung the outer chimb in separator.During installation, only the centre bore surrounding on separator top need arrange metal shelf rest, make described outer chimb rest on metal shelf rest, central tube can be realized to be suspended in separator.Compared with the strip steel plate formula supporting form in background technology, need along surrounding welding strip steel plate on central tube, avoid and grasp bad and weld seam between the strip steel plate that causes and central tube because welding and disconnect, central tube is tilted the generation of even dropping situations.Compared with the housing supports form in background technology, need at central tube upper end circumferencial direction welding round steel, not only avoid because central tube upper end, round steel and pipe are all built by laying bricks or stones in furnace wall, central tube and pipe will bear the moiety by weight of furnace wall, the expansion of central tube is affected, and the extruding being subject to furnace wall produces shear stress afterwards and occurs the situation of crackle.And do not need welding, thus avoid the situation generation causing central tube to tilt because weld seam disconnects.Owing to avoiding, central tube tilts, the generation of dropping situations, substantially prolongs the service life of central tube.
Again because the upper diameter of cylinder body is greater than its underpart diameter, the upper end circumference of cylinder body has for being hung the outer chimb in separator.During installation, only the centre bore surrounding on separator top need arrange metal shelf rest, make described outer chimb rest on metal shelf rest, central tube can be realized to be suspended in separator.The insertion depth of energy accurate control centre cylinder and position, avoid center wound packages situation that is inclined or that tilt and occur, can not cause negative effect, decrease dust secondary droplets rate in the gas flow, improve the separative efficiency of separator the flow direction of air-flow.
Accompanying drawing explanation
Fig. 1 is central cylinder for circulating fluidized-bed boiler structural representation of the present utility model;
Fig. 2 is the installation site schematic diagram of central cylinder for circulating fluidized-bed boiler of the present utility model on separator.
Detailed description of the invention
As depicted in figs. 1 and 2, central cylinder for circulating fluidized-bed boiler of the present utility model comprises a body, and the upper diameter of cylinder body is greater than its underpart diameter.Wherein, described cylinder body has upper straight section 4, cone section 3 and lower straight section 2 from top to bottom successively, and the length of described upper straight section 4 is identical with the centre bore height at separator 6 top.
For ease of installing, in the upper end of cylinder body, circumference is processed with for being hung the outer chimb 5 in separator 6.The cross section of described outer chimb 5 is rectangle.
For strengthening the intensity of cylinder body, described lower straight section 2 cylindrical is processed with reinforcing annular muscle 1, and described reinforcing annular muscle 1 has three, these three reinforcing annular muscle being vertically evenly arranged along lower straight section 2.Wherein, for convenience of being lifted into by central tube in separator 6 from top, the external diameter of described reinforcing annular muscle 1 is less than the external diameter of upper straight section 4.
As shown in Figure 2, first in machining center hole, separator 6 top, and on centre bore, four 7 font shelf rests 7 are evenly arranged along surrounding in advance.Then, with lifting appliance, central tube is sling, according to the order of lower straight section 2, cone section 3 and upper straight section 4, central tube is loaded in the centre bore at separator 6 top successively, and the outer chimb 5 of central tube upper end is rested above the transverse part of four 7 font shelf rests 7.Finally, casing frame 8 is set in the outside of 7 font shelf rests 7, and cast wall on 7 font shelf rests 7 in casing frame 8 and central tube upper end, namely complete the installation that center is logical.
Claims (4)
1. central cylinder for circulating fluidized-bed boiler, comprises a body, it is characterized in that the upper diameter of a body is greater than its underpart diameter, and the upper end circumference of cylinder body has for being hung the outer chimb (5) in separator (6).
2. central cylinder for circulating fluidized-bed boiler according to claim 1, it is characterized in that described cylinder body has upper straight section (4), cone section (3) and lower straight section (2) from top to bottom successively, the length of described upper straight section (4) and the centre bore height adaptation at separator (6) top.
3. central cylinder for circulating fluidized-bed boiler according to claim 2, it is characterized in that described lower straight section (2) cylindrical has reinforcing annular muscle (1), the external diameter of described reinforcing annular muscle (1) is less than the external diameter of upper straight section (4).
4. the central cylinder for circulating fluidized-bed boiler according to any one of claim 1 ~ 3, is characterized in that the cross section of described outer chimb (5) is rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420809601.2U CN204478032U (en) | 2014-12-20 | 2014-12-20 | Central cylinder for circulating fluidized-bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420809601.2U CN204478032U (en) | 2014-12-20 | 2014-12-20 | Central cylinder for circulating fluidized-bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204478032U true CN204478032U (en) | 2015-07-15 |
Family
ID=53633821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420809601.2U Expired - Fee Related CN204478032U (en) | 2014-12-20 | 2014-12-20 | Central cylinder for circulating fluidized-bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204478032U (en) |
-
2014
- 2014-12-20 CN CN201420809601.2U patent/CN204478032U/en not_active Expired - Fee Related
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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: 20150715 Termination date: 20211220 |