CN107185701B - The method and apparatus resumed operation after tripping for coal pulverizer - Google Patents
The method and apparatus resumed operation after tripping for coal pulverizer Download PDFInfo
- Publication number
- CN107185701B CN107185701B CN201710406098.4A CN201710406098A CN107185701B CN 107185701 B CN107185701 B CN 107185701B CN 201710406098 A CN201710406098 A CN 201710406098A CN 107185701 B CN107185701 B CN 107185701B
- Authority
- CN
- China
- Prior art keywords
- coal pulverizer
- coal
- rotating speed
- dynamic separator
- pulverizer
- 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.)
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Links
- 239000003245 coal Substances 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000002817 coal dust Substances 0.000 claims abstract description 18
- 230000007423 decrease Effects 0.000 claims abstract description 10
- 208000011580 syndromic disease Diseases 0.000 claims abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000000227 grinding Methods 0.000 description 4
- 210000000038 chest Anatomy 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
-
- 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
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/30—Passing gas through crushing or disintegrating zone the applied gas acting to effect material separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
- Crushing And Grinding (AREA)
Abstract
The embodiment of the present invention provides a kind of method and apparatus for resuming operation after the coal pulverizer tripping with dynamic separator, belongs to thermal power plant pulverized coal preparation system operation and maintenance field.The method includes：Start to be passed through cold wind to the coal pulverizer the coal dust in the coal pulverizer is cooled down and be purged before coal pulverizer startup；Start dynamic separator, the dynamic separator rotating speed is increased to the first rotating speed；Start the coal pulverizer, with the decline of the coal pulverizer electric current, continuously decrease the rotating speed of the dynamic separator, until the dynamic separator rotating speed is down to the second rotating speed and the electric current of the coal pulverizer is down to no-load current；The hot air isolating baffle for opening the coal pulverizer, to improve the entrance air quantity of the coal pulverizer and export wind-warm syndrome to the normal operating value of the coal pulverizer；And start feeder.After above-mentioned technical proposal solves coal pulverizer tripping, the problem of needing disk coal or manual cleaning and bring inconvenience, cost of labor and more environmentally friendly has been saved.
Description
Technical field
The present invention relates to thermal power plant pulverized coal preparation system operation and maintenances, more particularly to for dynamic separator
The method and apparatus resumed operation after coal pulverizer tripping.
Background technology
Currently, coal pulverizer trip accident caused by a variety of causes often occurs in thermal power plant's operation.It is such to carry dynamic
After the coal pulverizer tripping of separator, product coal is more on mill, directly initiates coal pulverizer, boiler heat load increases suddenly, can cause
Combustion chamber draft fluctuates widely, steam temperature, tube wall temperature, vapour pressure quickly increase, and threatens the safe operation of boiler.If by coal pulverizer
Memory coal manual cleaning not only increases human cost, and coal dust can also pollute ambient enviroment.And the product coal in coal pulverizer is still
One has to solve the problems, such as.
Invention content
In order to need disk coal or manual cleaning and bring inconvenience after solving the problem of coal pulverizer tripping, the embodiment of the present invention
Purpose be to provide the method and apparatus resumed operation after a kind of tripping for coal pulverizer.
To achieve the goals above, on the one hand, the embodiment of the present invention provides a kind of for the coal-grinding with dynamic separator
The method resumed operation after machine tripping, the method includes：Coal pulverizer startup before start to the coal pulverizer be passed through cold wind with
Coal dust in the coal pulverizer is cooled down and purged；Start dynamic separator, the dynamic separator rotating speed is increased to
First rotating speed；Start the coal pulverizer, with the decline of the coal pulverizer electric current, continuously decreases turning for the dynamic separator
Speed, until the dynamic separator rotating speed is down to the second rotating speed and the electric current of the coal pulverizer is down to no-load current；Open institute
The hot air isolating baffle for stating coal pulverizer is normal to the coal pulverizer with the entrance air quantity and outlet wind-warm syndrome that improve the coal pulverizer
Runtime value；And start feeder.
Optionally, the method further includes：The steam for fire xtinguishing of the second duration is put into the coal pulverizer before being passed through cold wind.
Optionally, described second when it is 3 minutes a length of.
Optionally, the time for being passed through cold wind is more than or equal to 10 minutes.
Optionally, first rotating speed is more than or equal to 1000 revs/min.
Optionally, second rotating speed is more than or equal to 500 revs/min and is less than or equal to 600 revs/min.
Optionally, the method further includes before coal pulverizer startup, after starting and/or opens the coal pulverizer hot wind
Deslagging is carried out to coal pulverizer before isolating baffle.
Optionally, after the startup feeder, according to the coal pulverizer operating condition, adjust or close the cold wind tune
Save baffle.
On the other hand, the application also provides a kind of for executing according to above-mentioned for the coal pulverizer with dynamic separator
The device for the method resumed operation after tripping.
Through the above technical solutions, after solving coal pulverizer tripping, disk coal or manual cleaning are needed and asking for bringing inconvenience
Topic.Cost of labor, environmental protection can be saved under the premise of not influencing boiler operatiopn safety, and can be straight after coal pulverizer startup
It connects and puts into operation, save unit or pulverized coal preparation system time, simplify operation link, improve working efficiency.
The other feature and advantage of the embodiment of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is further understood to the embodiment of the present invention for providing, an and part for constitution instruction, under
The specific implementation mode in face is used to explain the embodiment of the present invention together, but does not constitute the limitation to the embodiment of the present invention.Attached
In figure：
Fig. 1 is recovery fortune after a kind of coal pulverizer tripping for carrying dynamic separator that an embodiment of the present invention provides
The flow chart of capable method；
Fig. 2 is restored after a kind of coal pulverizer for carrying dynamic separator that another embodiment of the present invention provides trips
The flow chart of the method for operation；And
Fig. 3 is extensive after a kind of coal pulverizer for carrying dynamic separator that a preferred embodiment of the invention provides trips
The flow chart of the method run again.
Specific implementation mode
The specific implementation mode of the embodiment of the present invention is described in detail below in conjunction with attached drawing.It should be understood that this
The described specific implementation mode in place is merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.
Fig. 1 is recovery fortune after a kind of coal pulverizer tripping for carrying dynamic separator that an embodiment of the present invention provides
The flow chart of capable method, as shown in Figure 1, in one embodiment of the application, the method may include following steps：
In step S101, it can start to be passed through cold wind to coal pulverizer with to the coal dust in coal pulverizer before coal pulverizer startup
It is cooled down and is purged, so that the coal dust in coal pulverizer is gradually cooled down and is purged part coal dust and enter burner hearth.
In step s 102, start dynamic separator, dynamic separator rotating speed can be increased to the first rotating speed, with limitation
Coal dust enters the speed of burner hearth, reduces the disturbance to coal dust to burner hearth.
In step s 103, start coal pulverizer, with the reduction of the coal dust amount in coal pulverizer, under the meeting gradually of coal pulverizer electric current
Drop, can follow the decline of coal pulverizer electric current, continuously decrease the rotating speed of dynamic separator, so that more coal dusts can enter stove
Thorax, until dynamic separator rotating speed is down to the second rotating speed and the electric current of coal pulverizer is down to no-load current.
In step S104, the hot air isolating baffle of coal pulverizer is opened, to improve the entrance air quantity of coal pulverizer and go out one's intention as revealed in what one says
Temperature to coal pulverizer carries out normal operating value when normal coal-grinding operation；And
In step S105, start feeder, completes pulverized coal preparation system and restore normal operation.
In one embodiment of the application, the first rotating speed and the second rotating speed can according to the actual conditions of coal pulverizer and/or
Experience is preset.First rotating speed may, for example, be 1000 revs/min or other rotating speeds higher than 1000 revs/min.
Second rotating speed may, for example, be a certain rotating speed more than or equal to 500 revs/min and less than or equal to 600 revs/min.
Fig. 2 is restored after a kind of coal pulverizer for carrying dynamic separator that another embodiment of the present invention provides trips
The flow chart of the method for operation.As shown in Fig. 2, the optional embodiment as an embodiment of the present invention, the method may be used also
To include the following steps：
In step s 201, before being passed through cold wind, the steam for fire xtinguishing of the second duration is put into coal pulverizer.
The making time of coal pulverizer steam for fire xtinguishing will be controlled strictly, and explosion of Coal Pulverizing System, another party are on the one hand prevented
Face prevents from overstocking the excessive grinding for influencing coal pulverizer of coal dust humidity in coal pulverizer, goes out powder.Second duration can for example be set as 3
Minute.
Fig. 3 is extensive after a kind of coal pulverizer for carrying dynamic separator that a preferred embodiment of the invention provides trips
The flow chart of the method run again.As shown in figure 3, the preferred embodiment as an embodiment of the present invention, the method is also
An at least step in may comprise steps of：
In step S301, before coal pulverizer startup, deslagging is carried out to coal pulverizer.
In step s 302, after coal pulverizer startup, deslagging is carried out to coal pulverizer.
In step S303, before preparing to open coal pulverizer hot air isolating baffle, deslagging is carried out to coal pulverizer.
It will be appreciated by persons skilled in the art that the above-mentioned deslagging opportunity to coal pulverizer can also be according to coal pulverizer inner product
The case where coal, selects other rational opportunitys.
Optionally, above-mentioned tapping process by coal pulverizer dreg removing system and/or can be accomplished manually, and its object is to prevent wind
Indoor accumulation coal cinder.
Preferably, after starting feeder, cold wind controllable register can be adjusted or close according to coal pulverizer operating condition,
To reduce cold wind.To ensure that the time for being passed through cold wind to the cooling of coal dust in coal pulverizer and the effect of purging should be greater than being equal to 10
Minute.
The application one embodiment also provides a kind of for resuming operation after the coal pulverizer tripping with dynamic separator
The device of method, the device can control coal pulverizer, feeder, dynamic separator, cold wind controllable register and hot air isolating baffle.
And by executing the above method, to complete to resume operation after coal pulverizer trips.
In one embodiment of the application, described device is configured as executing following steps：
In step S101, it can start to be passed through cold wind to coal pulverizer with to the coal dust in coal pulverizer before coal pulverizer startup
It is cooled down and is purged, so that the coal dust in coal pulverizer is gradually cooled down and is purged part coal dust and enter burner hearth.
In step s 102, start dynamic separator, dynamic separator rotating speed can be increased to the first rotating speed, with limitation
Coal dust enters the speed of burner hearth, reduces the disturbance to coal dust to burner hearth.
In step s 103, start coal pulverizer, with the reduction of the coal dust amount in coal pulverizer, under the meeting gradually of coal pulverizer electric current
Drop, can follow the decline of coal pulverizer electric current, continuously decrease the rotating speed of dynamic separator, so that more coal dusts can enter stove
Thorax, until dynamic separator rotating speed is down to the second rotating speed and the electric current of coal pulverizer is down to no-load current.
In step S104, the hot air isolating baffle of coal pulverizer is opened, to improve the entrance air quantity of coal pulverizer and go out one's intention as revealed in what one says
Temperature to coal pulverizer carries out normal operating value when normal coal-grinding operation；And
In step S105, start feeder, completes pulverized coal preparation system and restore normal operation.
Through the above technical solutions, after solving coal pulverizer tripping, disk coal or manual cleaning are needed and asking for bringing inconvenience
Topic.Cost of labor, environmental protection can be saved under the premise of not influencing boiler operatiopn safety, and can be straight after coal pulverizer startup
It connects and puts into operation, save unit or pulverized coal preparation system time, simplify operation link, improve working efficiency.
The optional embodiment of example of the present invention, still, the embodiment of the present invention and unlimited are described in detail above in association with attached drawing
Detail in the above embodiment can be to the embodiment of the present invention in the range of the technology design of the embodiment of the present invention
Technical solution carry out a variety of simple variants, these simple variants belong to the protection domain of the embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the embodiment of the present invention pair
Various combinations of possible ways no longer separately illustrate.
It will be appreciated by those skilled in the art that it is that can pass through to implement the method for the above embodiments
Program is completed to instruct relevant hardware, which is stored in a storage medium, including some instructions are used so that one
A (can be microcontroller, chip etc.) or processor (processor) execute the whole of each embodiment the method for the application
Or part steps.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
In addition, arbitrary combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is violated, disclosure of that of the embodiment of the present invention is equally should be considered as.
Claims (9)
1. a kind of method for resuming operation after the coal pulverizer tripping with dynamic separator, which is characterized in that the method
Including：
Start to be passed through cold wind to the coal pulverizer the coal dust in the coal pulverizer is cooled down and be blown before coal pulverizer startup
It sweeps；
Start dynamic separator, the dynamic separator rotating speed is increased to the first rotating speed；
Start the coal pulverizer, with the decline of the coal pulverizer electric current, continuously decreases the rotating speed of the dynamic separator, until
The dynamic separator rotating speed is down to the second rotating speed and the electric current of the coal pulverizer is down to no-load current；
The hot air isolating baffle for opening the coal pulverizer, to improve the entrance air quantity of the coal pulverizer and export wind-warm syndrome to the mill
The normal operating value of coal machine；And
Start feeder.
2. according to the method described in claim 1, it is characterized in that, the method further includes：To the mill before being passed through cold wind
Coal machine puts into the steam for fire xtinguishing of the second duration.
3. according to the method described in claim 2, it is characterized in that, described second when it is 3 minutes a length of.
4. according to the method described in claim 1, it is characterized in that, the time for being passed through cold wind be more than or equal to 10 minutes.
5. according to the method described in claim 1, it is characterized in that, first rotating speed is more than or equal to 1000 revs/min.
6. according to the method described in claim 1, it is characterized in that, second rotating speed is more than or equal to 500 revs/min and is less than
Equal to 600 revs/min.
7. according to the method described in claim 1, it is characterized in that, the method further includes before coal pulverizer startup, opens
Deslagging is carried out after dynamic and/or before opening the coal pulverizer hot air isolating baffle to coal pulverizer.
8. according to the method described in claim 1, it is characterized in that, after the startup feeder, transported according to the coal pulverizer
Market condition adjusts or closes the cold wind controllable register of the coal pulverizer.
9. a kind of be used for according to any one of claim 1-8 claim with dynamic separator for executing
The device for the method resumed operation after coal pulverizer tripping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710406098.4A CN107185701B (en) | 2017-06-01 | 2017-06-01 | The method and apparatus resumed operation after tripping for coal pulverizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710406098.4A CN107185701B (en) | 2017-06-01 | 2017-06-01 | The method and apparatus resumed operation after tripping for coal pulverizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107185701A CN107185701A (en) | 2017-09-22 |
| CN107185701B true CN107185701B (en) | 2018-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710406098.4A Active CN107185701B (en) | 2017-06-01 | 2017-06-01 | The method and apparatus resumed operation after tripping for coal pulverizer |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360593B (en) * | 2019-08-09 | 2020-08-11 | 上海明华电力科技有限公司 | Coal mill trip control method under low-load three-coal-mill operation mode |
| CN116328928A (en) * | 2023-04-03 | 2023-06-27 | 国能河北沧东发电有限责任公司 | Control method, device, storage medium and electronic equipment of pulverizing system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0636417B1 (en) * | 1993-07-26 | 1998-11-18 | Mitsubishi Jukogyo Kabushiki Kaisha | Coal pulverizer associated with a rotary classifier and method for operating the same |
| CN1257757A (en) * | 1999-12-29 | 2000-06-28 | 上海宝钢集团公司 | Tail gas recirculation system for coal injection and pulverization of blast furnace and its control method |
| CN101612605A (en) * | 2009-07-28 | 2009-12-30 | 义马环保电力有限公司 | Be applied to the programmed control method and the device of coal fired power generation unit boiler pulverized coal preparation system |
| CN105289830A (en) * | 2015-11-30 | 2016-02-03 | 上海明华电力技术工程有限公司 | Medium-speed coal mill start-stop control method based on online coal quantity compensation |
| CN106269197A (en) * | 2016-08-01 | 2017-01-04 | 中国神华能源股份有限公司 | A kind of pulverizer outlet temperature control system and control method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7850104B2 (en) * | 2007-03-21 | 2010-12-14 | Honeywell International Inc. | Inferential pulverized fuel flow sensing and manipulation within a coal mill |
-
2017
- 2017-06-01 CN CN201710406098.4A patent/CN107185701B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0636417B1 (en) * | 1993-07-26 | 1998-11-18 | Mitsubishi Jukogyo Kabushiki Kaisha | Coal pulverizer associated with a rotary classifier and method for operating the same |
| CN1257757A (en) * | 1999-12-29 | 2000-06-28 | 上海宝钢集团公司 | Tail gas recirculation system for coal injection and pulverization of blast furnace and its control method |
| CN101612605A (en) * | 2009-07-28 | 2009-12-30 | 义马环保电力有限公司 | Be applied to the programmed control method and the device of coal fired power generation unit boiler pulverized coal preparation system |
| CN105289830A (en) * | 2015-11-30 | 2016-02-03 | 上海明华电力技术工程有限公司 | Medium-speed coal mill start-stop control method based on online coal quantity compensation |
| CN106269197A (en) * | 2016-08-01 | 2017-01-04 | 中国神华能源股份有限公司 | A kind of pulverizer outlet temperature control system and control method thereof |
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| CN107185701A (en) | 2017-09-22 |
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Address after: 100011 Beijing Dongcheng District, West Binhe Road, No. 22 Patentee after: China Shenhua Energy Co.,Ltd. Patentee after: National Energy Group Guohua Power Co.,Ltd. Patentee after: Guoneng Hebei Cangdong Power Generation Co.,Ltd. Address before: 100011 Shenhua building, 22 West Binhe Road, Dongcheng District, Beijing Patentee before: China Shenhua Energy Co.,Ltd. Patentee before: BEIJING GUOHUA POWER Co.,Ltd. Patentee before: HEBEI GUOHUA CANGDONG POWER GENERATION Co.,Ltd. |