CN212408720U - Improved split type compact pulverized coal distributor - Google Patents
Improved split type compact pulverized coal distributor Download PDFInfo
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- CN212408720U CN212408720U CN202021449530.1U CN202021449530U CN212408720U CN 212408720 U CN212408720 U CN 212408720U CN 202021449530 U CN202021449530 U CN 202021449530U CN 212408720 U CN212408720 U CN 212408720U
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Abstract
The utility model discloses an improved split compact pulverized coal distributor, which comprises a Venturi type diffusion section, a plurality of split bin bodies, a plurality of resistance adjusting boxes, a plurality of square and round reducer pipes and a plurality of powder outlet pipes; the top export of coal pulverizer separator is linked together with the bottom entry of venturi diffusion section, the bottom entry of each split type storehouse body is linked together with the top export of venturi diffusion section, a split type storehouse body corresponds a resistance adjustment case, a square circle reducing pipe and a play powder pipe, the bottom entry of resistance adjustment case is linked together with the top export that corresponds the split type storehouse body, the bottom entry of square circle reducing pipe is linked together with the top export that corresponds the resistance adjustment case, the bottom entry that goes out the powder pipe is linked together with the top entry that corresponds square circle reducing pipe, this distributor can further effectively reduce the deviation of buggy distribution, it is comparatively convenient to install simultaneously.
Description
Technical Field
The utility model belongs to the field is carried to gas-solid two-phase flow, a split type compact pulverized coal distributor of improved generation is related to.
Background
The coal-fired boiler of the large power station generally adopts a medium-speed mill direct-blowing type pulverizing system, compared with a storage type pulverizing system, primary air powder in each coal powder pipeline at the outlet of a medium-speed coal mill is directly supplied to each burner in real time, and whether the distribution of the coal powder quantity and the air quantity in each coal powder pipeline at the outlet of the medium-speed coal mill is uniform or not directly influences the combustion intensity distribution in the boiler. Under the large background that a coal-fired unit develops towards higher safety, economy, environmental protection and flexibility, higher requirements are provided for the air-powder distribution uniformity of outlets of all burners in a furnace, and a pulverized coal distributor, as a device for solving the problems, undergoes the technical development of generations, and aims to continuously reduce the pulverized coal quantity and air quantity deviation among pulverized coal pipelines on the premise of considering resistance, installation space and adjustability.
At present, the advanced type that the deviation of coal powder distribution is controlled within 10% and the deviation of wind speed is controlled within 5% mainly comprises a double-adjustable coal powder distributor and a compact coal powder distributor, wherein the double-adjustable coal powder distributor can even control the deviation of coal powder distribution within 5%, but the compact coal powder distributor has small volume, low cost, low requirement on-site modification space and wider application range. The compact pulverized coal distributor still has some defects, such as the problem that pulverized coal distribution deviation is difficult to further reduce due to the influence of inlet inflow nonuniformity, and the problem that the annular pulverized coal distribution box cannot be installed when meeting the motor side arrangement of the dynamic separator.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a split type compact buggy distributor of improved generation, this distributor can further effectively reduce the deviation of buggy distribution, and it is comparatively convenient to install simultaneously.
In order to achieve the purpose, the improved split type compact pulverized coal distributor comprises a Venturi type diffusion section, a plurality of split type bin bodies, a plurality of resistance adjusting boxes, a plurality of square and round reducer pipes and a plurality of powder outlet pipes;
the top export of coal pulverizer separator is linked together with the bottom entry of venturi diffusion section, the bottom entry of each split type storehouse body is linked together with the top export of venturi diffusion section, a split type storehouse body corresponds a resistance adjustment case, a square circle reducing pipe and a play powder pipe, the bottom entry of resistance adjustment case is linked together with the top export that corresponds the split type storehouse body, the bottom entry of square circle reducing pipe is linked together with the top export that corresponds the resistance adjustment case, the bottom entry that goes out the powder pipe is linked together with the top entry that corresponds the square circle reducing pipe.
The split type bin body is provided with a powder quantity adjusting baffle.
And an air quantity adjusting baffle is arranged on the resistance adjusting box.
The cross section of the resistance adjusting box is of a square structure.
The split type bin body is a cuboid box body.
All the split bin bodies are distributed in sequence along the circumferential direction.
The utility model discloses following beneficial effect has:
the utility model discloses an improved generation split type compact buggy distributor when concrete operation, replace current circular cone formula diffuser through the venturi diffuser to improve diffuser export annular cross-section buggy granule radial distribution's homogeneity, the change of air velocity is great in the venturi structure, is favorable to the intensive mixing of wind-powder, has reduced the original buggy distribution deviation of storehouse body entry, can further reduce the buggy volume distribution deviation between each buggy pipeline; simultaneously the utility model discloses a split type storehouse body for the scene is arranged more in a flexible way, has solved the difficult problem that dynamic separator side motor was arranged and is difficult to the installation down, and split type storehouse body processing, transportation and installation are all easier.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a cross-sectional view taken at a-a in fig. 1.
Wherein, 1 is a Venturi type diffusion section, 2 is a split type bin body, 3 is a resistance adjusting box, 4 is a square and round reducer pipe, 5 is a powder outlet pipe, 6 is a powder quantity adjusting baffle, and 7 is an air quantity adjusting baffle.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1 and 2, the improved split compact pulverized coal distributor of the present invention comprises a venturi-type diffuser 1, a plurality of split bin bodies 2, a plurality of resistance adjusting boxes 3, a plurality of square-round reducer pipes 4 and a plurality of powder outlet pipes 5; the top export of coal pulverizer separator is linked together with the bottom entry of venturi diffusion section 1, the bottom entry of each split type storehouse body 2 is linked together with the top export of venturi diffusion section 1, a split type storehouse body 2 corresponds a resistance adjustment case 3, a square circle reducing pipe 4 and a play powder pipe 5, the bottom entry of resistance adjustment case 3 is linked together with the top export that corresponds split type storehouse body 2, the bottom entry of square circle reducing pipe 4 is linked together with the top export that corresponds resistance adjustment case 3, the bottom entry that goes out powder pipe 5 is linked together with the top entry that corresponds square circle reducing pipe 4.
A powder quantity adjusting baffle 6 is arranged on the split type bin body 2; an air quantity adjusting baffle 7 is arranged on the resistance adjusting box 3; the cross section of the resistance adjusting box 3 is of a square structure; the split type bin body 2 is a cuboid box body; the split type bin bodies 2 are distributed in turn along the circumferential direction.
The utility model discloses a theory of operation does:
the primary air powder separated by the coal mill separator enters the Venturi type diffusion section 1, the Venturi structure increases the height-width ratio of the diffusion section, so that the annular inner edge of the inlet is expanded outwards, the coal powder particles are more easily and uniformly diffused in the radial direction of the whole space by changing the speed direction of the inlet, the particle phase distribution deviation on the inlet section of the split type bin body 2 is reduced, and the coal powder quantity distribution deviation among coal powder pipelines is further reduced; the primary air powder output by the Venturi type diffusion section 1 enters each split type bin body 2, a user can adjust the size of an inlet at the bottom of each split type bin body 2 through the powder quantity adjusting baffle 6, the distribution deviation adjustment of the coal powder quantity is realized, the primary air powder output by the split type bin body 2 enters the resistance adjusting box 3, the resistance of air flow is adjusted through adjusting the opening degree of the air quantity adjusting baffle 7, the leveling of the air speed deviation is realized, and the primary air powder output by the resistance adjusting box 3 is discharged through the square-round reducer pipe 4 and the powder outlet pipe 5 in sequence.
The split type storehouse body 2 is the cuboid box that is independent separately, and quantity is the same with the quantity of resistance adjustment case 3 and the quantity of play powder pipe 5, and the entry of the split type storehouse body 2 is the rectangle cross-section, and the export of the split type storehouse body 2 is the square cross-section, and powder quantity adjusting baffle 6 does the adjustment range of split type storehouse body 2 entry area square cross-section's area ~ the area of rectangle cross-section, the design site arrangement of the split type storehouse body 2 is more nimble, and processing, transportation, the installation of the cuboid storehouse body are all easier, and the range of application is wider, and the cost is lower.
Claims (6)
1. An improved split type compact pulverized coal distributor is characterized by comprising a Venturi type diffusion section (1), a plurality of split type bin bodies (2), a plurality of resistance adjusting boxes (3), a plurality of square and round reducing pipes (4) and a plurality of powder outlet pipes (5);
the top export of coal pulverizer separator is linked together with the bottom entry of venturi diffusion section (1), the bottom entry of each split type storehouse body (2) is linked together with the top export of venturi diffusion section (1), a split type storehouse body (2) corresponds a resistance adjustment case (3), a square circle reducing pipe (4) and one play powder pipe (5), the bottom entry of resistance adjustment case (3) is linked together with the top export that corresponds split type storehouse body (2), the bottom entry of square circle reducing pipe (4) is linked together with the top export that corresponds resistance adjustment case (3), the bottom entry that goes out powder pipe (5) is linked together with the top entry that corresponds square circle reducing pipe (4).
2. The improved split compact pulverized coal distributor as claimed in claim 1, wherein the split bin body (2) is provided with a pulverized coal amount adjusting baffle (6).
3. The improved split compact pulverized coal distributor as claimed in claim 1, wherein the resistance adjusting box (3) is provided with an air volume adjusting baffle (7).
4. The improved split compact pulverized coal dispenser as claimed in claim 1, wherein the resistance adjusting box (3) has a square structure in cross section.
5. The improved split compact pulverized coal distributor as claimed in claim 1, wherein the split bin body (2) is a rectangular parallelepiped box body.
6. The improved split compact pulverized coal distributor as claimed in claim 1, wherein each split bin body (2) is distributed in turn along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021449530.1U CN212408720U (en) | 2020-07-21 | 2020-07-21 | Improved split type compact pulverized coal distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021449530.1U CN212408720U (en) | 2020-07-21 | 2020-07-21 | Improved split type compact pulverized coal distributor |
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| Publication Number | Publication Date |
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| CN212408720U true CN212408720U (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021449530.1U Active CN212408720U (en) | 2020-07-21 | 2020-07-21 | Improved split type compact pulverized coal distributor |
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| CN (1) | CN212408720U (en) |
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2020
- 2020-07-21 CN CN202021449530.1U patent/CN212408720U/en active Active
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