CN202366780U - Device for automatically regulating pulverized coal fineness for medium-speed coal mill - Google Patents
Device for automatically regulating pulverized coal fineness for medium-speed coal mill Download PDFInfo
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- CN202366780U CN202366780U CN201120444856XU CN201120444856U CN202366780U CN 202366780 U CN202366780 U CN 202366780U CN 201120444856X U CN201120444856X U CN 201120444856XU CN 201120444856 U CN201120444856 U CN 201120444856U CN 202366780 U CN202366780 U CN 202366780U
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- 239000003245 coal Substances 0.000 title claims abstract description 67
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 28
- 230000001276 controlling effect Effects 0.000 claims abstract description 13
- 230000003068 static effect Effects 0.000 claims description 23
- 238000000926 separation method Methods 0.000 claims description 22
- 239000002817 coal dust Substances 0.000 claims description 16
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 5
- 238000010304 firing Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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Abstract
The utility model relates to the field of electricity generation, in particular to a device for automatically regulating pulverized coal fineness for a medium-speed coal mill, wherein a method comprises the steps of: obtaining a parameter of coal supply quantity of the coal mill; and regulating a separator according to the parameter of the coal supply quantity, and controlling the coal fineness. According to the embodiment of the utility model, the coal mill can be used for regulating the coal mill in real time through a computer, and the separator is regulated aiming to different coal supply quantities, therefore, the coal fineness is regulated, the power consumption of the coal mill is reduced and the economical efficiency when the coal powder burns reaches a better effect.
Description
Technical field
The utility model relates to power field, particularly regulates the device of fineness of pulverized coal automatically about a kind of medium-speed pulverizer.
Background technology
Along with the growth of energy demand, some power plants are increasing to every part demand now, and coal dust obtains after need grinding coal with coal pulverizer, and in general there is requirement in the power plant to the fineness size of coal dust; Be illustrated in figure 1 as the structure chart of coal pulverizer in the prior art, wherein comprise coal spout, separator; Interior centrum, impeller unit, planetary reducer; Discharging valve device is folded to an adjusting device, venturi reason pipe; The side body set, mill cup apparatus, sealing air collector; Parts such as stone outlet, after coal was ground, the particle that differs in size was all blown afloat by air-flow; Separate with the excessive particle of fineness through the separator particle that size is qualified then, the excessive particle of fineness is ground again, and the qualified particle of size is discharged from coal pulverizer; The fineness that existing separator grinds coal dust by the baffle plate or the dynamic electric rotating machine control of static state is set the aperture of baffle plate or the rotating speed of vane type electric rotating machine by manual work according to boiler load usually when equipment is installed, just immobilize then.
The utility model people of the utility model analyzes the back to prior art and finds that concerning medium-speed pulverizer, the fineness of pulverized coal under the different operating modes differs bigger, and parameters such as itself and coal-supplying amount, primary air flow, separator are closely bound up.In the prior art when boiler load is higher; The coal pulverizer coal-supplying amount generally also can be higher; This moment, the aperture or the rotating speed of motor of separator baffle plate remained unchanged all the time along with the increase of coal pulverizer coal-supplying amount, and such result is exactly that fineness of pulverized coal can be higher when coal-supplying amount is higher, and promptly coal dust is thick partially; Can cause coal dust firing not to the utmost, boiler loss increases, economy reduces.
Theoretically no matter under what operating mode fineness of pulverized coal all remain economy, the completing combustion that desired value just helps coal dust, yet at present in most power plant, fineness of pulverized coal is not regulated not consistently with the operation of boiler, has caused economic loss to a certain extent.
The utility model content
The utility model embodiment provides a kind of medium-speed pulverizer to regulate the device of fineness of pulverized coal automatically; Be used to solve the problems of the prior art; Promptly make through regulating the separator baffle plate that fineness of pulverized coal is corresponding to be changed with coal-supplying amount; To promote the after-flame of coal dust, reduce imperfect combustion loss, thereby improve boiler efficiency.
The utility model embodiment provides a kind of medium-speed pulverizer to regulate the device of fineness of pulverized coal automatically, comprises,
Parameter acquiring unit, processing unit, driver element;
Said parameter acquiring unit is connected with said processing unit, and said driver element is connected with said processing unit, and said driver element is connected with the separator of coal pulverizer;
Said parameter acquiring unit is used to obtain the parameter of coal pulverizer coal-supplying amount;
Said processing unit is used for the parameter according to the adjusted separator of parameter of said coal-supplying amount;
Said driver element is used for according to the parameter of said adjusting separator separator being regulated, the fineness of control coal dust.
Automatically regulate a further aspect of fineness of pulverized coal device according to the described a kind of medium-speed pulverizer of the utility model embodiment, said acquiring unit comprises power plant's operational factor acquisition system.
Automatically regulate another further aspect of fineness of pulverized coal device according to the described a kind of medium-speed pulverizer of the utility model embodiment, said separator comprises the separator of baffle-type, perhaps comprises the separator of vane type.
Automatically regulate another further aspect of fineness of pulverized coal device according to the described a kind of medium-speed pulverizer of the utility model embodiment, said processing unit calculates as follows,
When coal-supplying amount during at [10,20] t/h, controlling said driver element, to regulate the aperture of static separation device baffle plate be 45% of the whole apertures of baffle plate;
When coal-supplying amount (20; 60) during t/h; Wherein x is a coal-supplying amount according to
; Y is a baffle opening, and the control driver element is regulated static separation device baffle opening;
When coal-supplying amount during at [60,70] t/h, controlling said driver, to regulate static separation device baffle opening be 65% of the whole apertures of baffle plate.
Automatically regulate another further aspect of fineness of pulverized coal device according to the described a kind of medium-speed pulverizer of the utility model embodiment, said processing unit calculates as follows,
When coal-supplying amount during at [10,20] t/h, controlling said dynamic separator motor speed through driver element is 600rpm;
When coal-supplying amount during at (20,60) t/h, according to y=700-5x, wherein x is a coal-supplying amount, and y is a motor speed, through driver element control dynamic separator motor speed;
When coal-supplying amount during at [60,70] t/h, controlling said dynamic separator motor speed through driver element is 400rpm.
Through the utility model embodiment, can carry out real-time regulated to coal pulverizer through computer, regulate separators to different coal-supplying amounts, thereby realize adjusting, so that the economy when coal pulverizer power consumption, coal dust firing reaches effect preferably fineness of pulverized coal.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Shown in Figure 1 is the structure chart of coal pulverizer in the prior art;
Automatically the method flow diagram of regulating fineness of pulverized coal for a kind of medium-speed pulverizer of the utility model embodiment shown in Figure 2;
Automatically the device sketch map of regulating fineness of pulverized coal for a kind of medium-speed pulverizer of the utility model embodiment shown in Figure 3;
Fig. 4 a is depicted as the graph of relation between the utility model embodiment separator baffle opening and the coal-supplying amount;
Fig. 4 b is a graph of relation between the utility model embodiment separator motor speed and the coal-supplying amount;
Fig. 5 a is depicted as the structure chart of the utility model static separation device and driver element;
Fig. 5 b is depicted as the structure chart of the utility model dynamic separator and driver element.
The specific embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Be illustrated in figure 2 as a kind of medium-speed pulverizer of the utility model embodiment and regulate the method flow diagram of fineness of pulverized coal automatically.
Comprise step 201, obtain the parameter of coal pulverizer coal-supplying amount through the operational factor of feeder.Wherein, feeder can provide the coal-supplying amount parameter to coal pulverizer, and this coal-supplying amount generally also all is to pass through periodic calibrating.
An embodiment as the utility model regulates said separator and comprises, regulates the aperture of static separation device baffle plate, perhaps regulates the rotating speed of dynamic separator impeller motor.Wherein, the aperture of said static separation device baffle plate is big more, and said fineness of pulverized coal is big more, and said static separation device baffle opening is more little, and said fineness of pulverized coal is more little; Said dynamic separator rotating speed of motor is fast more, and said fineness of pulverized coal is big more, and said rotating speed of motor is low more, and said fineness of pulverized coal is more little.Wherein, fineness is big, is meant that grain diameter is big; Fineness is little, is meant that grain diameter is little.
Said parameter regulation static separation device baffle opening according to coal-supplying amount, thus the fineness control of carrying out coal dust be meant, according to regulating as follows:
When coal-supplying amount when [10,20] t/h (ton/per hour), the aperture of said static separation device baffle plate is 45% of the whole apertures of baffle plate;
When coal-supplying amount (20; 60) during t/h; The aperture of said static separation device baffle plate does;
wherein x is coal-supplying amount, and y is a baffle opening;
When coal-supplying amount during at [60,70] t/h, said static separation device baffle opening is 65% of the whole apertures of baffle plate.
Said parameter regulation dynamic separator motor speed according to coal-supplying amount, thus the fineness control of carrying out coal dust be meant, according to regulating as follows:
When coal-supplying amount during at [10,20] t/h, said dynamic separator motor speed is 600rpm (a per minute rotating speed);
When coal-supplying amount during at (20,60) t/h, said dynamic separator motor speed does, y=700-5x, and wherein x is a coal-supplying amount, y is a motor speed;
When coal-supplying amount during at [60,70] t/h, said dynamic separator motor speed is 400rpm.
Can avoid through above-mentioned control that separator does not change because coal-supplying amount changes, become big problem, reach the optimum economy of coal pulverizer thereby cause the coal pulverizer live load to become big power consumption.
Be illustrated in figure 3 as a kind of medium-speed pulverizer of the utility model embodiment and regulate the device sketch map of fineness of pulverized coal automatically.
Comprise parameter acquiring unit 301, processing unit 302, driver element 303.
Said parameter acquiring unit 301 is connected with said processing unit 302, and said driver element 303 is connected with said processing unit 302, and said driver element 303 is connected with separator for coal mill.
Said processing unit 302 calculates as follows, obtains the parameter to the different adjusting separator of different coal-supplying amounts,
When coal-supplying amount when [10,20] t/h (ton/per hour), controlling the aperture that said driver element 303 regulates static separation device baffle plates is 45% of the whole apertures of baffle plate;
When coal-supplying amount (20; 60) during t/h; Wherein x is a coal-supplying amount according to
; Y is a baffle opening, and control driver element 303 is regulated static separation device baffle opening;
When coal-supplying amount during at [60,70] t/h, controlling said driver 303, to regulate static separation device baffle openings be 65% of the whole apertures of baffle plate.
Perhaps, said processing unit 302 calculates as follows, obtains the parameter to the different adjusting separator of different coal-supplying amounts,
When coal-supplying amount during at [10,20] t/h, controlling said dynamic separator motor speed is 600rpm (per minute rotating speed);
When coal-supplying amount during at (20,60) t/h, according to y=700-5x, wherein x is a coal-supplying amount, and y is a motor speed, control dynamic separator motor speed;
When coal-supplying amount during at [60,70] t/h, controlling said dynamic separator motor speed is 400rpm.
Through the foregoing description, can carry out real-time regulated to coal pulverizer through computer, regulate separators to different coal-supplying amounts, thereby realize adjusting, so that the economy when coal pulverizer power consumption, coal dust firing reaches effect preferably fineness of pulverized coal.
Be depicted as the graph of relation between the utility model embodiment separator baffle opening and the coal-supplying amount like Fig. 4 a; Fig. 4 b is a graph of relation between the utility model embodiment separator motor speed and the coal-supplying amount; Be directed to the separator of baffle type or the separator of motor-driven rotation type; Just can make the economy of coal pulverizer get a promotion according to above curve controlled separator so that reach balance between the fineness of coal dust and the corresponding coal-supplying amount.
The above-described specific embodiment; Purpose, technical scheme and beneficial effect to the utility model have carried out further explain, it should be understood that the above is merely the specific embodiment of the utility model; And be not used in the protection domain that limits the utility model; All within the spirit and principle of the utility model, any modification of being made, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (5)
1. a medium-speed pulverizer is regulated the device of fineness of pulverized coal automatically, it is characterized in that comprising,
Parameter acquiring unit, processing unit, driver element;
Said parameter acquiring unit is connected with said processing unit, and said driver element is connected with said processing unit, and said driver element is connected with the separator of coal pulverizer;
Said parameter acquiring unit is used for obtaining from feeder the parameter of coal pulverizer coal-supplying amount;
Said processing unit is used for the parameter according to the adjusted separator of parameter of said coal-supplying amount;
Said driver element is used for according to the parameter of said adjusting separator separator being regulated, the fineness of control coal dust.
2. a kind of medium-speed pulverizer according to claim 1 is regulated the device of fineness of pulverized coal automatically, it is characterized in that, said acquiring unit comprises power plant's operational factor acquisition system.
3. a kind of medium-speed pulverizer according to claim 1 is regulated the device of fineness of pulverized coal automatically, it is characterized in that, said separator comprises the static separation device, perhaps comprises dynamic separator.
4. a kind of medium-speed pulverizer according to claim 3 is regulated the device of fineness of pulverized coal automatically, it is characterized in that, said processing unit calculates as follows,
When coal-supplying amount during at [10,20] t/h, controlling said driver element, to regulate the aperture of static separation device baffle plate be 45% of the whole apertures of baffle plate;
When coal-supplying amount (20; 60) during t/h; Wherein x is a coal-supplying amount according to
; Y is a baffle opening, and the control driver element is regulated the baffle opening of static separation device;
When coal-supplying amount during at [60,70] t/h, controlling said driver, to regulate static separation device baffle opening be 65% of the whole apertures of baffle plate.
5. a kind of medium-speed pulverizer according to claim 3 is regulated the device of fineness of pulverized coal automatically, it is characterized in that, said processing unit calculates as follows,
When coal-supplying amount during at [10,20] t/h, controlling said dynamic separator motor speed through driver element is 600rpm;
When coal-supplying amount during at (20,60) t/h, according to y=700-5x, wherein x is a coal-supplying amount, and y is a motor speed, through driver element control dynamic separator motor speed;
When coal-supplying amount during at [60,70] t/h, controlling said dynamic separator motor speed through driver element is 400rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120444856XU CN202366780U (en) | 2011-11-10 | 2011-11-10 | Device for automatically regulating pulverized coal fineness for medium-speed coal mill |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201120444856XU CN202366780U (en) | 2011-11-10 | 2011-11-10 | Device for automatically regulating pulverized coal fineness for medium-speed coal mill |
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| CN202366780U true CN202366780U (en) | 2012-08-08 |
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| CN201120444856XU Expired - Lifetime CN202366780U (en) | 2011-11-10 | 2011-11-10 | Device for automatically regulating pulverized coal fineness for medium-speed coal mill |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103100477A (en) * | 2011-11-10 | 2013-05-15 | 华北电力科学研究院有限责任公司 | Method and device for automatic adjustment of fineness of pulverized coal for medium speed coal mill |
| CN104374675A (en) * | 2014-10-15 | 2015-02-25 | 国家电网公司 | Coal mill pulverized coal fineness online monitoring method |
| CN109541168A (en) * | 2018-11-26 | 2019-03-29 | 江苏方天电力技术有限公司 | A kind of economic fineness of pulverized coal on-line monitoring and method of adjustment |
| CN113304865A (en) * | 2021-05-19 | 2021-08-27 | 北京京能电力股份有限公司 | Vibration-proof control system and method for coal mill and storage medium |
-
2011
- 2011-11-10 CN CN201120444856XU patent/CN202366780U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103100477A (en) * | 2011-11-10 | 2013-05-15 | 华北电力科学研究院有限责任公司 | Method and device for automatic adjustment of fineness of pulverized coal for medium speed coal mill |
| CN103100477B (en) * | 2011-11-10 | 2015-02-04 | 华北电力科学研究院有限责任公司 | Method and device for automatic adjustment of fineness of pulverized coal for medium speed coal mill |
| CN104374675A (en) * | 2014-10-15 | 2015-02-25 | 国家电网公司 | Coal mill pulverized coal fineness online monitoring method |
| CN104374675B (en) * | 2014-10-15 | 2016-10-26 | 国家电网公司 | A kind of coal pulverizer fineness of pulverized coal on-line monitoring method |
| CN109541168A (en) * | 2018-11-26 | 2019-03-29 | 江苏方天电力技术有限公司 | A kind of economic fineness of pulverized coal on-line monitoring and method of adjustment |
| CN113304865A (en) * | 2021-05-19 | 2021-08-27 | 北京京能电力股份有限公司 | Vibration-proof control system and method for coal mill and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: NORTH CHINA POWER SCIENCE RESEARCH INST., CO., LTD. Effective date: 20131030 Owner name: NORTH CHINA POWER SCIENCE RESEARCH INST., CO., LTD Effective date: 20131030 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100045 XICHENG, BEIJING TO: 100031 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20131030 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: North China Electrical Power Research Institute LLC Address before: 100045 Beijing Fuxingmenwai Di Zang an Nan Xiang No. Patentee before: North China Electrical Power Research Institute LLC |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120808 |
|
| CX01 | Expiry of patent term |