CN219656122U - Wind powder concentration leveling device for coal mill - Google Patents
Wind powder concentration leveling device for coal mill Download PDFInfo
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- CN219656122U CN219656122U CN202223334846.8U CN202223334846U CN219656122U CN 219656122 U CN219656122 U CN 219656122U CN 202223334846 U CN202223334846 U CN 202223334846U CN 219656122 U CN219656122 U CN 219656122U
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- 239000000843 powder Substances 0.000 title claims abstract description 96
- 239000003245 coal Substances 0.000 title claims abstract description 53
- 230000007246 mechanism Effects 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010298 pulverizing process Methods 0.000 description 5
- 238000007664 blowing Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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Abstract
The utility model discloses a wind powder concentration leveling device for a coal mill, which comprises a separator (01), wherein a mixer (02) is communicated above the separator (01), a plurality of powder outlet pipes (03) are connected above the mixer (02), a wind powder concentration adjusting mechanism is arranged at the joint of the powder outlet pipes (03) and the mixer (02), and the adjusting mechanism is a combined mechanism and comprises at least one inlet caliber transverse adjusting mechanism (4) capable of changing the powder outlet pipes (03) and a vertical adjusting mechanism (5) capable of changing the flow direction of coal powder entering the powder outlet pipes (03). The leveling device has the beneficial effects of simple structure, low cost, good stability, capability of performing manual fine adjustment and contribution to popularization and application.
Description
Technical Field
The utility model relates to the technical field of coal mill in coal-fired power plants, in particular to a wind powder concentration leveling device for a powder outlet pipeline of a coal mill in a direct-fired pulverizing system of a coal-fired power plant.
Background
In recent years, along with the adjustment of policies in China, the energy structure is changing, the installed capacity of various renewable energy sources is increasing year by year, the traditional thermal power system is also being adjusted, the flexible operation capability of the thermal power system is becoming more important, in the flexible performance improvement process, the boiler system is an important part of the boiler system, the low-load operation of the boiler is ensured, and the important condition for maintaining stable combustion in the hearth is to ensure the uniformity of the distribution of the concentration of coal dust entering the hearth.
At present, the pulverizing system of the large-scale coal-fired power generation boiler is a direct-fired pulverizing system, and the pulverizing system has no independent pulverized coal distributor. After the coal mill is used for producing powder, the pulverized coal from the coal mill directly enters the hearth for combustion through a plurality of pipelines (such as four pipelines), and if the concentration of the pulverized coal is unbalanced, the problems such as flame deflection, flushing of a furnace wall, heat load deviation of the hearth and the like can be caused, and even the safety and the economy of low-load operation of a unit are affected. At present, the regulating equipment for improving the uniformity of the concentration distribution of the pulverized coal mainly comprises a throttling element and a pulverized coal distributor, but most direct-blowing pulverizing systems do not comprise independent pulverized coal distributors, the throttling element is mainly represented as an adjustable shrinkage cavity, and the defects of shell powder accumulation, easiness in blocking, abrasion failure, poor regulating linearity, incapability of continuous online regulation and the like exist in practical application. Therefore, the leveling of the wind powder concentration of the pipeline is a problem to be solved urgently.
In order to solve the technical problems, the inventor of the patent application finds that the Chinese patent application number is 2015164326. X, and the patent is named as a device and a method for adjusting the powder quantity deviation of each powder tube of a direct-blowing powder making system. The utility model patent with the patent application number 2022103770506, named coal power plant coal powder pipeline coal powder concentration leveling device and method, discloses a coal power plant coal powder pipeline coal powder concentration leveling device, wherein at least one bypass pipeline is arranged on a wind powder main pipeline of each coal mill from a separator to a mixer and then to each main powder pipe in parallel; or directly communicating the main powder pipe above each mixer through two bypass pipelines with opposite flow directions, wherein the diameter of the bypass pipeline is obviously smaller than that of the main pipeline; the bypass pipeline is provided with an ejector, and the powder concentration balance among the pipelines is realized through the suction effect of the ejector.
Through analysis of the patent documents, the inventor of the patent application finds that the technical problem of leveling the wind powder concentration of the pipeline can be solved by the patent proposal, but the defects of relatively complex structure, relatively high cost, low stability, incapability of manually fine adjustment, inconvenience in popularization and application and the like exist.
In summary, a wind powder concentration leveling device for a coal mill, which has a simple structure, low cost and good stability, can be manually finely adjusted, and is favorable for popularization and application, is lacking at present.
Disclosure of Invention
The utility model aims to solve the technical problems of providing the wind powder concentration leveling device for the coal mill, which has the advantages of simple structure, low cost, good stability, capability of performing manual fine adjustment and contribution to popularization and application.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows: a wind powder concentration leveling device for a coal mill comprises a separator, a mixer is communicated above the separator, a plurality of powder outlet pipes are connected above the mixer, a wind powder concentration adjusting mechanism is arranged at the joint of each powder outlet pipe and the mixer, and the adjusting mechanism is a combined mechanism and comprises at least one inlet caliber transverse adjusting mechanism capable of changing the powder outlet pipes and a vertical adjusting mechanism capable of changing the flow direction of coal powder entering the powder outlet pipes.
Preferably, the transverse adjusting mechanism comprises a transverse baffle, a transverse rotating component and a transverse adjusting handle; the transverse adjusting handle drives the transverse baffle to rotate through the transverse rotating component so as to change the inlet caliber of the powder outlet pipe.
Preferably, the transverse adjusting handle is provided with a transverse amplitude indicator which is used for indicating the adjusting amplitude.
Preferably, the transverse amplitude indicator is provided with a row of limiting holes, the transverse adjusting handle is provided with a through hole, the through hole can be overlapped with any one of the limiting holes on the transverse amplitude indicator in the rotating process of the handle, the leveling device is also matched with a bolt, and when the through hole is overlapped with the limiting hole, the bolt is inserted to lock the relative positions.
Preferably, the transverse baffle is of a folding fan structure, one side edge of the transverse baffle is a fixed edge, the other side edge of the transverse baffle is a free edge and is connected with the transverse rotating component, and the transverse adjusting handle drives the free edge to rotate through the transverse rotating component.
Preferably, the vertical adjusting mechanism comprises a vertical baffle plate, a vertical rotating part and a vertical adjusting handle; the vertical baffle is arranged at the inlet of the powder outlet pipe, and the vertical adjusting handle drives the vertical baffle to rotate through the vertical rotating component so as to change the flow direction of the pulverized coal entering the powder outlet pipe, thereby adjusting the concentration of the pulverized coal.
Preferably, the vertical adjusting handle is provided with a vertical amplitude indicator which is used for indicating the adjusting amplitude in a matching way.
Preferably, the vertical amplitude indicator is provided with a row of limiting holes, the vertical adjusting handle is provided with a through hole, the through hole can be overlapped with any one of the limiting holes on the vertical amplitude indicator in the rotating process of the handle, the leveling device is also matched with a bolt, and when the through hole is overlapped with the limiting hole, the bolt is inserted to lock the relative positions.
Preferably, the vertical baffle is a vertical curved plate or a flow guide baffle.
After the structure is adopted, the utility model has the following beneficial effects: this patent application creatively mills the buggy in the coal pulverizer behind the separator, when qualified buggy will follow the vertical departure of play powder pipe, at the entrance wind powder concentration adjustment mechanism of play powder pipe, when the buggy concentration of each export is uneven, accessible rotation regulation handle adjusting baffle, adjusts the buggy trend of corresponding play powder pipe entry size and play powder pipe to the buggy concentration size in this control pipe makes the buggy concentration that leaves from play powder pipe keep balanced. The concrete wind powder concentration adjusting mechanism adopts a mode of combining a transverse mechanism and a vertical mechanism, when the coal powder concentration of the powder outlet pipe is too high, the transverse baffle plate is rotated, and the inlet of the powder outlet pipe is reduced, so that the coal powder concentration in the pipe is reduced. Meanwhile, the vertical baffle plate can be rotated to control the flow direction of the pulverized coal entering the powder outlet pipe, so that the concentration of the pulverized coal is adjusted.
The two main adjusting modes have the beneficial effects of simple structure, low cost, good stability, capability of manual fine adjustment and contribution to popularization and application.
Drawings
FIG. 1 is a schematic cross-sectional view of a wind powder concentration leveling apparatus for a coal pulverizer of the present utility model after the apparatus is installed on the coal pulverizer.
Fig. 2 is an enlarged schematic view of the structure of the coal mill showing the lateral adjustment mechanism and the vertical adjustment mechanism on the two powder outlet pipes, respectively.
Fig. 3 is an enlarged schematic view of the structure of the present utility model showing both the horizontal adjusting mechanism and the vertical adjusting mechanism on the same powder outlet tube.
Fig. 4 is a schematic structural view of the lateral adjustment mechanism.
Fig. 5 is a schematic side view of fig. 4.
Fig. 6 is a schematic structural view of the vertical adjustment mechanism.
Fig. 7 is a schematic side view of the structure corresponding to fig. 6.
As shown in the figure: 01. separator 02, blender, 03, powder outlet pipe, 4, horizontal adjustment mechanism, 401, horizontal baffle, 402, horizontal rotating component, 403, horizontal adjustment handle, 404, horizontal range indicator, 5, vertical adjustment mechanism, 501, vertical baffle, 502, vertical rotating component, 503, vertical adjustment handle, 504, vertical range indicator.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 to 7, a wind powder concentration leveling device for a coal mill comprises a separator 01, a mixer 02 is communicated above the separator 01, a plurality of powder outlet pipes 03 are connected above the mixer 02, a wind powder concentration adjusting mechanism is arranged at the joint of the powder outlet pipes 03 and the mixer 02, and the adjusting mechanism is a combined mechanism and comprises at least one inlet caliber transverse adjusting mechanism 4 capable of changing the powder outlet pipes 03 and a vertical adjusting mechanism 5 capable of changing the flow direction of coal powder entering the powder outlet pipes 03.
Preferably, the lateral adjustment mechanism 4 includes a lateral baffle 401, a lateral rotation member 402, and a lateral adjustment handle 403; the transverse adjusting handle 403 drives the transverse baffle 401 to rotate through the transverse rotating component 402 so as to change the inlet caliber of the powder outlet pipe 03.
Preferably, the transverse adjusting handle 403 is provided with a transverse amplitude indicator 404 for indicating the adjusting amplitude.
Preferably, the transverse amplitude indicator 404 is provided with a row of limiting holes, the transverse adjusting handle 403 is provided with a through hole, the through hole can be overlapped with any one of the limiting holes on the transverse amplitude indicator 404 in the rotating process of the handle, the leveling device is also matched with a bolt, and when the through hole is overlapped with the limiting hole, the bolt is inserted to lock the relative position.
Preferably, the transverse baffle 401 has a folding fan structure, one side edge of the transverse baffle 401 is a fixed edge, the other side edge of the transverse baffle 401 is a free edge, and the transverse baffle is connected with the transverse rotating component 402, and the transverse adjusting handle 403 drives the free edge to rotate through the transverse rotating component 402.
Preferably, the vertical adjusting mechanism 5 comprises a vertical baffle 501, a vertical rotating component 502 and a vertical adjusting handle 503; the vertical baffle 501 is installed at the inlet of the powder outlet pipe 03, and the vertical adjusting handle 503 drives the vertical baffle 501 to rotate through the vertical rotating component 502 so as to change the flow direction of the pulverized coal entering the powder outlet pipe, thereby adjusting the concentration of the pulverized coal.
Preferably, the vertical adjusting handle 503 is provided with a vertical amplitude indicator 504 for indicating the adjusting amplitude.
Preferably, the vertical amplitude indicator 504 is provided with a row of limiting holes, the vertical adjusting handle 503 is provided with a through hole, the through hole can be overlapped with any one of the limiting holes on the vertical amplitude indicator 504 in the handle rotating process, the leveling device is also matched with a bolt, and when the through hole is overlapped with the limiting hole, the bolt is inserted to lock the relative position.
Preferably, the vertical baffle 501 is a vertical curved plate or a baffle.
In particular, the rotation direction of the horizontal baffle 401 is the radial rotation of the powder discharge tube 03, and the rotation of the vertical baffle 501 may be the radial rotation or the axial rotation of the powder discharge tube 03, and the direction of the flow is not particularly limited, and both rotation directions of the vertical baffle 501 may be changed. Shown in the drawings in this patent application is a radial rotation structure. Meanwhile, in the process of practical installation, at least one group of adjusting mechanisms consisting of a transverse adjusting mechanism 4 and a vertical adjusting mechanism 5 are installed at the inlet of each powder outlet pipe 03, and the relative positions of the two mechanisms are not limited, so that the transverse adjusting mechanism 4 can be arranged on the upper part, the vertical adjusting mechanism 5 can be arranged on the upper part, and the two mechanisms can be respectively installed at the left side and the right side of the inlet of the powder outlet pipe 03 side by side.
The utility model provides a when installation is used, specific accommodation process does:
1) The concentration of pulverized coal in each powder outlet pipe is monitored, the number of the powder outlet pipes is four, the powder outlet pipes are respectively marked as P1-P4, the powder quantity concentration is C1-C4, the concentration is maximum and is Cmax, and the minimum is Cmin.
2) And (3) adjusting the baffle combination of the powder outlet pipe corresponding to Cmax, wherein the baffle blocks part of powder from entering the main powder pipe, so that the concentration of the pulverized coal in the powder outlet pipe is reduced.
3) And (3) monitoring the concentration of the other two powder outlet pipes, and repeating the step (2) to ensure that the concentration deviation of all the powder outlet pipes is within +/-5 percent. The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.
Claims (9)
1. A wind powder concentration levelling device for coal pulverizer, it includes separator (01), separator (01) top intercommunication has blender (02), and the top of blender (02) is connected with many powder pipes (03), its characterized in that: the connection part of the powder outlet pipe (03) and the mixer (02) is provided with a wind powder concentration adjusting mechanism, wherein the adjusting mechanism is a combined mechanism and comprises at least one transverse adjusting mechanism (4) capable of changing the inlet caliber of the powder outlet pipe (03) and a vertical adjusting mechanism (5) capable of changing the flow direction of coal powder entering the powder outlet pipe (03).
2. The wind powder concentration leveling device for a coal mill according to claim 1, wherein: the transverse adjusting mechanism (4) comprises a transverse baffle plate (401), a transverse rotating component (402) and a transverse adjusting handle (403); the transverse adjusting handle (403) drives the transverse baffle plate (401) to rotate through the transverse rotating component (402) so as to change the inlet caliber of the powder outlet pipe (03).
3. The wind powder concentration leveling device for a coal mill according to claim 2, wherein: the transverse adjusting handle (403) is provided with a transverse amplitude indicator (404) which is used for indicating the adjusting amplitude.
4. The wind powder concentration leveling device for a coal mill according to claim 3, wherein: the leveling device is characterized in that a row of limiting holes are formed in the transverse amplitude indicator (404), a through hole is formed in the transverse adjusting handle (403), the through hole can be overlapped with any one of the limiting holes in the transverse amplitude indicator (404) in the handle rotating process, a plug pin is matched with the leveling device, and when the through hole is overlapped with the limiting holes, the plug pin is inserted to lock the relative positions.
5. The wind powder concentration leveling device for a coal mill according to claim 2, wherein: the transverse baffle plate (401) is of a folding fan structure, one side edge of the transverse baffle plate (401) is a fixed edge, the other side edge of the transverse baffle plate (401) is a free edge and is connected with the transverse rotating component (402), and the transverse adjusting handle (403) drives the free edge to rotate through the transverse rotating component (402).
6. The wind powder concentration leveling device for a coal mill according to claim 1, wherein: the vertical adjusting mechanism (5) comprises a vertical baffle plate (501), a vertical rotating component (502) and a vertical adjusting handle (503); the vertical baffle plate (501) is arranged at the inlet of the powder outlet pipe (03), and the vertical adjusting handle (503) drives the vertical baffle plate (501) to rotate through the vertical rotating component (502) so as to change the flow direction of the pulverized coal entering the powder outlet pipe, thereby adjusting the concentration of the pulverized coal.
7. The wind powder concentration leveling device for a coal mill according to claim 6, wherein: the vertical adjusting handle (503) is provided with a vertical amplitude indicator (504) which is used for indicating the adjusting amplitude.
8. The wind powder concentration leveling device for a coal mill according to claim 7, wherein: the leveling device is characterized in that a row of limiting holes are formed in the vertical amplitude indicator (504), a through hole is formed in the vertical adjusting handle (503), the through hole can be overlapped with any one of the limiting holes in the vertical amplitude indicator (504) in the handle rotating process, a plug pin is matched with the leveling device, and when the through hole is overlapped with the limiting holes, the plug pin is inserted to lock the relative positions.
9. The wind powder concentration leveling device for a coal mill according to claim 6, wherein: the vertical baffle plate (501) is a vertical curved plate or a flow guide baffle plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223334846.8U CN219656122U (en) | 2022-12-12 | 2022-12-12 | Wind powder concentration leveling device for coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223334846.8U CN219656122U (en) | 2022-12-12 | 2022-12-12 | Wind powder concentration leveling device for coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219656122U true CN219656122U (en) | 2023-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223334846.8U Active CN219656122U (en) | 2022-12-12 | 2022-12-12 | Wind powder concentration leveling device for coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219656122U (en) |
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2022
- 2022-12-12 CN CN202223334846.8U patent/CN219656122U/en active Active
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