CN112221682A - Static radial separator of coal mill capable of realizing on-line remote adjustment of coal powder fineness - Google Patents
Static radial separator of coal mill capable of realizing on-line remote adjustment of coal powder fineness Download PDFInfo
- Publication number
- CN112221682A CN112221682A CN202011157153.9A CN202011157153A CN112221682A CN 112221682 A CN112221682 A CN 112221682A CN 202011157153 A CN202011157153 A CN 202011157153A CN 112221682 A CN112221682 A CN 112221682A
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- China
- Prior art keywords
- separator
- coal
- coal mill
- baffle
- central shaft
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- 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.)
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- 239000003245 coal Substances 0.000 title claims abstract description 67
- 230000003068 static effect Effects 0.000 title claims abstract description 15
- 239000000843 powder Substances 0.000 title claims description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 239000002817 coal dust Substances 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 24
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 238000012856 packing Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/063—Fixing them on the shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a static radial separator of a coal mill, which can realize the online remote adjustment of the fineness of coal dust, wherein each separator baffle is positioned in a shell of the coal mill separator, all the separator baffles are divided into a plurality of groups, one group of separator baffles corresponds to an electric control system and a baffle adjusting mechanism, a central shaft corresponds to one separator baffle, a signal source is connected with the input end of a controller, the output end of the controller is connected with the control end of an angular travel actuator, the output shaft of the angular travel actuator is connected with the upper end of one central shaft, the central shafts in the same baffle adjusting mechanism are connected through an adjusting connecting rod, the lower end of each central shaft is inserted into the shell of the coal mill separator and then is connected with the corresponding separator baffle, the separator can realize the real-time remote adjustment of the fineness of coal dust at the outlet of the coal mill, and has simple structure, convenient maintenance, low cost and good energy-saving effect.
Description
Technical Field
The invention relates to a static separator of a coal mill, in particular to a static radial separator of the coal mill, which can realize the on-line remote adjustment of the fineness of coal powder.
Background
The coal sources of the existing power plants are relatively miscellaneous, the fuel quality of the boiler is changed greatly and frequently, and the fineness of the pulverized coal needs to be continuously adjusted according to the change of the coal quality during the operation of the boiler, so that the pulverized coal is combusted more completely, and the operation of the boiler is more efficient and economical. The coal mill separator is adjusted according to the actual coal quality entering the furnace and the operation parameters of the boiler, the fineness of coal dust at the outlet of the coal mill is changed, the problems of boiler operation such as increase of carbon content in fly ash, rise of exhaust gas temperature, increase of desuperheating water and the like caused by coal quality change can be effectively solved, and the problems of burning out of a burner nozzle and coking of a water-cooled wall of a hearth can be effectively avoided.
When the fineness of the coal dust at the outlet of the coal mill needs to be adjusted, the traditional static separator of the coal mill needs to be manually adjusted to the site. Due to the reasons of large adjusting workload, poor field environment, blocking of the adjusting baffle and the like, the effective adjustment of the fineness of the pulverized coal cannot be realized in actual operation. The dynamic separator can effectively solve the problems, can realize real-time adjustment of the fineness of the pulverized coal in a remote place, but has the problems of complex equipment, high cost, high difficulty in maintenance and the like, and the dynamic separator utilizes the motor to drive the rotor to separate the pulverized coal, so that certain electric quantity is wasted.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the static radial separator of the coal mill, which can realize the online remote adjustment of the fineness of the coal powder.
In order to achieve the aim, the static radial separator of the coal mill, which can realize the online remote adjustment of the fineness of the pulverized coal, comprises a separator shell of the coal mill, an electric control system, a baffle adjusting mechanism and a plurality of separator baffles;
each separator baffle is positioned in a separator shell of the coal mill, all the separator baffles are divided into a plurality of groups, one group of separator baffles corresponds to one electric control system and one baffle adjusting mechanism, each baffle adjusting mechanism comprises a plurality of central shafts, each electric control system comprises a controller, a signal source and an angle stroke actuator, one central shaft corresponds to one separator baffle, each signal source is connected with the input end of the controller, the output end of the controller is connected with the control end of the angle stroke actuator, the output shaft of the angle stroke actuator is connected with the upper end of one central shaft, the central shafts in the same baffle adjusting mechanism are connected through adjusting connecting rods, and the lower ends of the central shafts are inserted into the separator shell of the coal mill and then connected with the corresponding separator baffles.
The bearing seat is sleeved on the central shaft and located at the top of the separator shell of the coal mill, an upper deep groove ball bearing is arranged between the top of the bearing seat and the central shaft, and a lower deep groove ball bearing is arranged between the bottom of the bearing seat and the central shaft.
The coal pulverizer also comprises a sealing air inlet pipe, wherein a sealing air chamber is arranged between the separator baffle and the top of the coal pulverizer separator shell, and the sealing air inlet pipe is communicated with the sealing air chamber.
And the upper surface and the lower surface of the lower deep groove ball bearing and the upper deep groove ball bearing are both provided with sealing rings.
The invention has the following beneficial effects:
when the coal mill static radial separator capable of realizing on-line remote adjustment of coal dust fineness is in specific operation, coal dust is separated in the space inside the shell of the coal mill separator through the rotating centrifugal force generated by the separator baffle, the return powder enters the separator inner cone, a control signal output by a DCS control system is sent into a controller through a signal source, the controller controls the output shaft of an angular travel actuator to rotate, the output shaft of the angular travel actuator drives a central shaft and the separator baffle to rotate so as to change the magnitude of the rotating centrifugal force and further achieve the purpose of adjusting the coal dust fineness at the outlet of the coal mill, wherein only one baffle adjusting mechanism in each group of baffle adjusting mechanisms is provided with one set of electric control system, the central shafts in other baffle adjusting mechanisms in the group are driven by adjusting connecting rods to realize synchronous adjustment, so that electric energy is saved, and the structure is simple, the coal pulverizer has the advantages that the operation is convenient, the real-time remote adjustment of the fineness of coal powder at the outlet of the coal pulverizer can be realized, the defects of a static separator and a dynamic separator of the traditional coal pulverizer can be effectively avoided, and the practicability is high.
Furthermore, the traditional baffle adjusting mechanism adopts mechanical packing for sealing, when pulverized coal enters a packing box or the mechanism deforms, the central shaft is easy to jam, so that the baffle of the separator cannot be adjusted.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a position diagram of the adjusting link 2 according to the present invention.
Wherein, 1 is the coal mill separator shell 1, 2 is adjusting connecting rod 2, 3 is upper deep groove ball bearing, 4 is lower deep groove ball bearing, 5 is bearing seat 5, 6 is central shaft 6, 7 is sealed wind chamber 7, 8 is sealed wind inlet pipe 8, 9 is separator baffle 9, 10 is angle stroke executor 10, 11 is controller 11, 12 is signal source 12.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 and 2, the static radial separator of the coal mill capable of realizing on-line remote adjustment of coal powder fineness comprises a separator shell 1 of the coal mill, an electric control system, a baffle adjusting mechanism and a plurality of separator baffles 9; each separator baffle 9 is positioned in a separator shell 1 of the coal mill, all the separator baffles 9 are divided into a plurality of groups, one group of separator baffles 9 corresponds to one electric control system and one baffle adjusting mechanism, the baffle adjusting mechanism comprises a plurality of central shafts 6, the electric control system comprises a controller 11, a signal source 12 and an angular travel actuator 10, one central shaft 6 corresponds to one separator baffle 9, the signal source 12 is connected with the input end of the controller 11, the output end of the controller 11 is connected with the control end of the angular travel actuator 10, the output shaft of the angular travel actuator 10 is connected with the upper end of one central shaft 6, the central shafts 6 in the same baffle adjusting mechanism are connected through adjusting connecting rods 2, the lower end of each central shaft 6 is inserted into the separator shell 1 of the coal mill and then connected with the corresponding separator baffle 9, the number of the separator baffles 9 is 24, wherein 6 are in one group.
A bearing seat 5 is sleeved on the central shaft 6, wherein the bearing seat 5 is positioned at the top of the coal mill separator shell 1, an upper deep groove ball bearing 3 is arranged between the top of the bearing seat 5 and the central shaft 6, and a lower deep groove ball bearing 4 is arranged between the bottom of the bearing seat 5 and the central shaft 6.
The invention further comprises a sealing air inlet pipe 8, wherein a sealing air chamber 7 is arranged between the separator baffle plate 9 and the top of the coal mill separator shell 1, and the sealing air inlet pipe 8 is communicated with the sealing air chamber 7.
And the upper surface and the lower surface of the lower deep groove ball bearing 4 and the upper deep groove ball bearing 3 are both provided with sealing rings.
The specific working process of the invention is as follows:
the pulverized coal is separated in the space inside the separator shell 1 of the coal mill through the rotating centrifugal force generated by the separator baffle 9, and the returned powder enters the separator inner cone.
Control signals generated by a DCS (distributed control system) are sent into a controller 11 through a signal source 12, the controller 11 controls an output shaft of an angular travel actuator 10 to rotate, the output shaft of the angular travel actuator 10 drives one central shaft 6 to rotate, meanwhile, other corresponding central shafts 6 in the angular travel actuator 10 are driven to rotate through an adjusting connecting rod 2, and a separator baffle 9 is driven to rotate through the central shaft 6 so as to change the magnitude of the rotating centrifugal force and further achieve the purpose of adjusting the fineness of coal dust at an outlet of a coal pulverizer.
In addition, the traditional baffle adjusting mechanism adopts mechanical packing for sealing, and when coal powder enters a packing box or the mechanism deforms, the central shaft 6 is very easy to jam, so that the baffle 9 of the separator cannot be adjusted. According to the invention, the upper deep groove ball bearing 3 with the sealing rings on two sides and the lower deep groove ball bearing 4 with the sealing rings on two sides are arranged on the central shaft 6, so that the service life of the bearing can be ensured, and the central shaft 6 can be flexibly adjusted.
In order to further prevent the pulverized coal from entering the lower deep groove ball bearing 4, a sealing air chamber 7 is arranged, and sealing air output by a sealing air inlet pipe 8 enters the separator through a channel between the sealing air chamber 7 and the central shaft 6 to play a role of sealing.
Claims (4)
1. A static radial separator of a coal mill capable of realizing on-line remote adjustment of coal powder fineness is characterized by comprising a shell (1) of the coal mill separator, an electric control system, a baffle adjusting mechanism and a plurality of separator baffles (9);
each separator baffle (9) is positioned in a separator shell (1) of the coal mill, all the separator baffles (9) are divided into a plurality of groups, one group of separator baffles (9) corresponds to one electric control system and one baffle adjusting mechanism, each baffle adjusting mechanism comprises a plurality of central shafts (6), each electric control system comprises a controller (11), a signal source (12) and an angular travel actuator (10), one central shaft (6) corresponds to one separator baffle (9), the signal source (12) is connected with the input end of the controller (11), the output end of the controller (11) is connected with the control end of the angular travel actuator (10), the output shaft of the angular travel actuator (10) is connected with the upper end of one central shaft (6), the central shafts (6) in the same baffle adjusting mechanism are connected through adjusting connecting rods (2), and the lower ends of the central shafts (6) are inserted into the separator shell (1) of the coal mill and then are connected with the corresponding separator baffles (9) 9) Are connected.
2. The coal mill static radial separator capable of achieving on-line remote adjustment of coal dust fineness as claimed in claim 1, characterized in that a bearing seat (5) is sleeved on the central shaft (6), wherein the bearing seat (5) is located at the top of the coal mill separator housing (1), an upper deep groove ball bearing (3) is arranged between the top of the bearing seat (5) and the central shaft (6), and a lower deep groove ball bearing (4) is arranged between the bottom of the bearing seat (5) and the central shaft (6).
3. The static radial separator of the coal mill capable of realizing the online remote adjustment of the fineness of the pulverized coal as claimed in claim 1, further comprising a sealing air inlet pipe (8), wherein a sealing air chamber (7) is arranged between the separator baffle plate (9) and the top of the separator shell (1) of the coal mill, and the sealing air inlet pipe (8) is communicated with the sealing air chamber (7).
4. The static radial separator of the coal mill capable of realizing the online remote adjustment of the fineness of the pulverized coal as claimed in claim 2, wherein the upper and lower surfaces of the lower deep groove ball bearing (4) and the upper deep groove ball bearing (3) are provided with sealing rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011157153.9A CN112221682A (en) | 2020-10-26 | 2020-10-26 | Static radial separator of coal mill capable of realizing on-line remote adjustment of coal powder fineness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011157153.9A CN112221682A (en) | 2020-10-26 | 2020-10-26 | Static radial separator of coal mill capable of realizing on-line remote adjustment of coal powder fineness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112221682A true CN112221682A (en) | 2021-01-15 |
Family
ID=74110803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011157153.9A Pending CN112221682A (en) | 2020-10-26 | 2020-10-26 | Static radial separator of coal mill capable of realizing on-line remote adjustment of coal powder fineness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112221682A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004019109A1 (en) * | 2004-04-20 | 2005-12-08 | Alstom Power Boiler Gmbh | Separator flap operation for static or dynamic separator in roller mill, involves using flap adjustment actuator to adjustably actuate guide flaps and rigging device for concentric admission of follower pin in upper gudgeon of guide flap |
| US20150314330A1 (en) * | 2012-11-30 | 2015-11-05 | Lina Huang | High-efficiency, serial biaxial dynamic classification and recovered dust milling apparatus with automatic baffleplate regulation |
| CN110296431A (en) * | 2019-06-26 | 2019-10-01 | 西安热工研究院有限公司 | A kind of fineness of pulverized coal automatic regulating system and method based on static separation device |
| CN110918241A (en) * | 2019-12-27 | 2020-03-27 | 西安热工研究院有限公司 | Real-time adjustable static separator of medium-speed coal mill |
| CN214390605U (en) * | 2020-10-26 | 2021-10-15 | 西安西热锅炉环保工程有限公司 | Static radial separator of coal mill capable of realizing on-line remote adjustment of coal powder fineness |
-
2020
- 2020-10-26 CN CN202011157153.9A patent/CN112221682A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004019109A1 (en) * | 2004-04-20 | 2005-12-08 | Alstom Power Boiler Gmbh | Separator flap operation for static or dynamic separator in roller mill, involves using flap adjustment actuator to adjustably actuate guide flaps and rigging device for concentric admission of follower pin in upper gudgeon of guide flap |
| US20150314330A1 (en) * | 2012-11-30 | 2015-11-05 | Lina Huang | High-efficiency, serial biaxial dynamic classification and recovered dust milling apparatus with automatic baffleplate regulation |
| CN110296431A (en) * | 2019-06-26 | 2019-10-01 | 西安热工研究院有限公司 | A kind of fineness of pulverized coal automatic regulating system and method based on static separation device |
| CN110918241A (en) * | 2019-12-27 | 2020-03-27 | 西安热工研究院有限公司 | Real-time adjustable static separator of medium-speed coal mill |
| CN214390605U (en) * | 2020-10-26 | 2021-10-15 | 西安西热锅炉环保工程有限公司 | Static radial separator of coal mill capable of realizing on-line remote adjustment of coal powder fineness |
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