CN203744292U - Automatic pulverized coal concentrationadjusting device for coal mill - Google Patents
Automatic pulverized coal concentrationadjusting device for coal mill Download PDFInfo
- Publication number
- CN203744292U CN203744292U CN201420114027.9U CN201420114027U CN203744292U CN 203744292 U CN203744292 U CN 203744292U CN 201420114027 U CN201420114027 U CN 201420114027U CN 203744292 U CN203744292 U CN 203744292U
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- Prior art keywords
- coal
- pulverized coal
- rotating shaft
- powder density
- pipe
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- 239000003245 coal Substances 0.000 title claims abstract description 160
- 239000000843 powder Substances 0.000 claims description 46
- 238000001739 density measurement Methods 0.000 claims description 3
- 239000002817 coal dust Substances 0.000 description 12
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model discloses an automatic pulverized coal concentrationadjusting device for a coal mill. The automatic pulverized coal concentrationadjusting device comprisespulverized coal concentrationadjustingbaffle plates, a driving device and a control unit, wherein each pulverized coal concentrationadjusting baffle plate adopts a flat plate shape,is arranged in a pulverized coal distributor of the coal mill, corresponds to one pulverized coal pipe, and is rotationally arranged on a rotating shaft; the driving device is connected with the rotating shaft; and the control unit sends a corresponding control signal according to a pulverized coal concentration measuring device in the correspondingpulverized coal pipe, and the driving device drives the rotating shaft to rotate for a corresponding angle according to the control signal in the correspondingpulverized coal pipe, so that the pulverized coal airflow trend is changed. Automatic adjustment of the pulverized coal concentrationadjusting baffle plates is achieved through the motor driving device, the pulverized coal concentrationadjusting baffle plates rotate around the rotating shaft, thequantity of pulverized coal entering each pulverized coal pipe is adjusted by changing the moving direction of the pulverized coal, and the pulverized coal concentration is adjusted finally.
Description
Technical field
The utility model relates to large coal-fired power plant coal powder boiler combustion control field, is specifically related to coal pulverizer full automatic pulverized coal concentration adjusting device.
Background technology
The coal pulverizer of large coal-fired power plant pulverized-coal fired boiler generally adopts unit pulverized-coal system to provide coal dust for burner, and the quantity of every group of burner is 4～8.According to boiler design codes and standards, the be less than ± 10%(of pulverized coal mass flow distribution deviation between each group burner and the ratio of the mean value of all coal pipes).Determine that coal dust distributes the principal element of deviation to have flow resistance deviation between coal pipe, coal powder density deviation, fineness of pulverized coal and a coal-air ratio.After fineness of pulverized coal and a coal-air ratio reach prescribed limit, will distribute leveling by regulating coal dust flow velocity and concentration carry out coal dust.
But in the past, owing to cannot the coal powder density in coal dust Dual-Phrase Distribution of Gas olid being carried out to on-line measurement, therefore can only under cold conditions operating mode, with air, replace coal dust to carry out coal dust and distribute leveling, to such an extent as to the coal powder density deviation that enters into each coal pipe is very large, can not realize the mean allocation of coal dust, thereby affect the efficiency of combustion of whole pulverized-coal fired boiler.
Utility model content
Technical problem to be solved in the utility model is to solve the larger problem of coal powder density deviation in coal pulverizer coal pipe.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is to provide a kind of coal pulverizer full automatic pulverized coal concentration adjusting device, comprising:
Coal powder density controllable register, is tabular, be arranged in the pulverized coal distributor on coal pulverizer, and corresponding to a coal pipe, described coal powder density controllable register rotates and is arranged on rotating shaft;
Drive unit, is arranged on coal pulverizer, and described drive unit is connected with described rotating shaft;
Control module, sends corresponding control signal according to coal powder density measurement result current in corresponding coal pipe, and described drive unit drives described rotating shaft to rotate corresponding angle according to described control signal, thereby changes breeze airflow flow direction.
In such scheme, the axis of described rotating shaft is parallel with the axis of coal pipe, and described rotating shaft arranges perpendicular to described coal powder density controllable register.
In such scheme, the axis of described rotating shaft is vertical with the axis of coal pipe, and described coal powder density controllable register is parallel with the axis of described rotating shaft.
In such scheme, described rotating shaft is arranged in pulverized coal distributor, and the axis of described rotating shaft and the axes intersect of coal pipe, and described coal powder density controllable register is arranged in pulverized coal distributor, there is certain distance with coal pipe entrance, and suitable with the internal diameter of coal pipe.
In such scheme, described rotating shaft is arranged on the wall of coal pulverizer pulverized coal distributor, described coal powder density controllable register be arranged on described coal pipe entrance under, described rotating shaft is arranged on the edge of described coal powder density controllable register.
In such scheme, described coal powder density controllable register rotational angle is 0 °～180 °.
In such scheme, described coal powder density controllable register rotational angle is 0 °～360 °.
In such scheme, described drive unit adopts motor.
The utility model, by motor driver, realize the automatic adjusting of coal powder density controllable register, coal powder density controllable register rotates around rotating shaft, regulates the coal dust amount that enters each coal pipe, the final object that regulates coal powder density that realizes by changing the direction of motion of coal dust.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment decomposition texture schematic diagram for the moment;
Fig. 2 is the partial enlarged drawing of A portion in the utility model Fig. 1;
Decomposition texture schematic diagram when Fig. 3 is the utility model embodiment bis-;
Fig. 4 is the partial enlarged drawing of B portion in the utility model Fig. 3;
Decomposition texture schematic diagram when Fig. 5 is the utility model embodiment tri-;
Fig. 6 is the partial enlarged drawing of C portion in the utility model Fig. 5.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
As shown in Figure 1, the utility model provides a kind of coal pulverizer full automatic pulverized coal concentration adjusting device, comprising:
Coal powder density controllable register 1, is tabular, and rectangle or ellipse are arranged in the pulverized coal distributor 2 at coal pulverizer top, and corresponding to a coal pipe, apart from the entrance of coal pipe 3, has certain distance, and coal powder density controllable register 1 rotates and is arranged on rotating shaft 4;
Drive unit, is arranged on coal pulverizer pulverized coal distributor 2 outsides, and drive unit is connected with rotating shaft 4;
Control module, according to coal powder density measurement result current in corresponding coal pipe, send corresponding control signal, drive unit drives rotating shaft 4 to rotate corresponding angle according to control signal, thereby change breeze airflow at the flow direction of the entry position of coal pipe 3, and then change the coal input quantity of coal pipe.
Embodiment mono-:
Shown in Fig. 2, the axis of rotating shaft is parallel with the axis of coal pipe, and rotating shaft arranges perpendicular to coal powder density controllable register.Rotating shaft and coal pipe are arranged off-centre, and like this, along with the rotation of coal powder density controllable register, coal powder density controllable register and the coal pipe intersection in horizontal plane changes, thereby change the coal input quantity of coal pipe.
Embodiment bis-:
In conjunction with shown in Fig. 3 to 4, the axis of rotating shaft is vertical with the axis of coal pipe, and coal powder density controllable register is parallel with the axis of rotating shaft.Rotating shaft is arranged in pulverized coal distributor, and the axis of rotating shaft and the axes intersect of coal pipe, and coal powder density controllable register is arranged in pulverized coal distributor, and suitable with the internal diameter of coal pipe.
Embodiment tri-:
In conjunction with shown in Fig. 5 to 6, the axis of rotating shaft is vertical with the axis of coal pipe, and coal powder density controllable register is parallel with the axis of rotating shaft.Rotating shaft is arranged on the inwall of coal pulverizer, coal powder density controllable register be arranged on coal pipe entrance under, rotating shaft is arranged on the edge of coal powder density controllable register.
Similar to embodiment mono-, in embodiment bis-and three, along with the rotation of coal powder density controllable register, coal powder density controllable register and the coal pipe intersection in horizontal plane changes, thereby changes the coal input quantity of coal pipe.
In embodiment mono-and three, coal powder density controllable register rotational angle is 0 °～180 °.In embodiment bis-, coal powder density controllable register rotational angle is 0 °～360 °.
In above-mentioned two kinds of embodiment, drive unit can adopt motor or cylinder to realize.
The utility model, by drive units such as motor, cylinders, realize the automatic adjusting of coal powder density controllable register, coal powder density controllable register rotates around rotating shaft, regulates the coal dust amount that enters each coal pipe, the final object that regulates coal powder density that realizes by changing the direction of motion of coal dust.
The utility model is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, within all falling into protection domain of the present utility model.
Claims (8)
1. coal pulverizer full automatic pulverized coal concentration adjusting device, is characterized in that, comprising:
Coal powder density controllable register, is tabular, be arranged in the pulverized coal distributor on coal pulverizer, and corresponding to a coal pipe, described coal powder density controllable register rotates and is arranged on rotating shaft;
Drive unit, is fixedly installed on the outside of pulverized coal distributor, and described drive unit is connected with described rotating shaft;
Control module, sends corresponding control signal according to coal powder density measurement result current in corresponding coal pipe, and described drive unit drives described rotating shaft to rotate corresponding angle according to described control signal, thereby changes breeze airflow flow direction.
2. coal pulverizer full automatic pulverized coal concentration adjusting device as claimed in claim 1, is characterized in that, the axis of described rotating shaft is parallel with the axis of coal pipe, and described rotating shaft arranges perpendicular to described coal powder density controllable register.
3. coal pulverizer full automatic pulverized coal concentration adjusting device as claimed in claim 1, is characterized in that, the axis of described rotating shaft is vertical with the axis of coal pipe, and described coal powder density controllable register is parallel with the axis of described rotating shaft.
4. coal pulverizer full automatic pulverized coal concentration adjusting device as claimed in claim 3, it is characterized in that, described rotating shaft is arranged in pulverized coal distributor, and the axis of described rotating shaft and the axes intersect of coal pipe, described coal powder density controllable register is arranged in pulverized coal distributor, suitable and be provided with gap with coal pipe entrance with the internal diameter of coal pipe.
5. coal pulverizer full automatic pulverized coal concentration adjusting device as claimed in claim 3, it is characterized in that, described rotating shaft is arranged on the inwall of coal pulverizer pulverized coal distributor, described coal powder density controllable register be arranged on described coal pipe entrance under, described rotating shaft is arranged on the edge of described coal powder density controllable register.
6. coal pulverizer full automatic pulverized coal concentration adjusting device as described in claim 1,2,3 or 5, is characterized in that, described coal powder density controllable register rotational angle is 0 °～180 °.
7. coal pulverizer full automatic pulverized coal concentration adjusting device as claimed in claim 4, is characterized in that, described coal powder density controllable register rotational angle is 0 °～360 °.
8. coal pulverizer full automatic pulverized coal concentration adjusting device as claimed in claim 1, is characterized in that, described drive unit adopts motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420114027.9U CN203744292U (en) | 2014-03-13 | 2014-03-13 | Automatic pulverized coal concentrationadjusting device for coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420114027.9U CN203744292U (en) | 2014-03-13 | 2014-03-13 | Automatic pulverized coal concentrationadjusting device for coal mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203744292U true CN203744292U (en) | 2014-07-30 |
Family
ID=51344086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420114027.9U Expired - Lifetime CN203744292U (en) | 2014-03-13 | 2014-03-13 | Automatic pulverized coal concentrationadjusting device for coal mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203744292U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822224A (en) * | 2014-03-13 | 2014-05-28 | 青岛立宇科技开发有限公司 | Full automatic coal powder concentration regulator of coal grinder |
-
2014
- 2014-03-13 CN CN201420114027.9U patent/CN203744292U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822224A (en) * | 2014-03-13 | 2014-05-28 | 青岛立宇科技开发有限公司 | Full automatic coal powder concentration regulator of coal grinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Cheng Jiadong Inventor after: Liu Shaopei Inventor after: Li Xueyan Inventor after: Fan Quangui Inventor before: Cheng Jiadong Inventor before: Liu Shaopei Inventor before: Li Xueyan Inventor before: Fan Quangui |
|
| COR | Change of bibliographic data | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140730 |
|
| CX01 | Expiry of patent term |