CN103100477A - Method and device for automatic adjustment of fineness of pulverized coal for medium speed coal mill - Google Patents
Method and device for automatic adjustment of fineness of pulverized coal for medium speed coal mill Download PDFInfo
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- CN103100477A CN103100477A CN2011103549712A CN201110354971A CN103100477A CN 103100477 A CN103100477 A CN 103100477A CN 2011103549712 A CN2011103549712 A CN 2011103549712A CN 201110354971 A CN201110354971 A CN 201110354971A CN 103100477 A CN103100477 A CN 103100477A
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Abstract
The invention relates to the field of power generation, and especially to a method and a device for automatic adjustment of fineness of pulverized coal for a medium speed coal mill. The method comprises steps of: acquiring parameters of coal feeding of the coal mill; and regulating a separator according to the parameters of coal feeding to control coal fineness. According to the embodiment provided by the invention, the coal mill can be regulated on a real-time basis through a computer, and the separator can be adjusted according to different coal feedings, so as to realize the adjustment of the fineness of pulverized coal, and further realize good results of economical efficiency of the coal mill in terms of power consumption and coal combustion.
Description
Technical field
The present invention relates to power field, particularly automatically regulate method and the device of fineness of pulverized coal about a kind of medium-speed pulverizer.
Background technology
present growth along with energy demand, some power plants are increasing to the demand of every part, and coal dust obtains after need to grinding coal with coal pulverizer, 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 prior art, wherein comprise coal spout, separator, interior centrum, impeller unit, planetary reducer, discharging valve device, be folded to an adjusting device, venturi reason pipe, the side body set, the mill cup apparatus, the sealing air collector, the parts such as stone outlet, after coal is polished, the particle that differs in size is all blown afloat by air-flow, then separate through the excessive particle of separator particle that size is qualified and fineness, the excessive particle of fineness is polished again, and the qualified particle of size is discharged from coal pulverizer, the fineness that existing separator is controlled grinding powder coal by baffle plate or the dynamic electric rotating machine of static state, usually when installing, equipment sets the aperture of baffle plate or the rotating speed of vane type rotary motor by artificial according to boiler load, then just immobilize.
The present inventor analyzes rear discovery to prior art, and concerning medium-speed pulverizer, the fineness of pulverized coal under different operating modes differs larger, and the parameter such as itself and coal-supplying amount, primary air flow, separator is closely bound up.In prior art when boiler load is higher, the coal pulverizer coal-supplying amount generally also can be higher, this moment, the aperture of separator baffle plate or the rotating speed of motor remained unchanged all the time along with the increase of coal pulverizer coal-supplying amount, such result is exactly that fineness of pulverized coal can be higher when coal-supplying amount is higher, be that coal dust is partially thick, 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 is conducive to coal dust, yet at present in most power plant, fineness of pulverized coal is not regulated not unanimously with the operation of boiler, has caused economic loss to a certain extent.
Summary of the invention
Method and device that the embodiment of the present invention provides a kind of medium-speed pulverizer automatically to regulate fineness of pulverized coal, be used for solving the problems of the prior art, namely make by 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 embodiment of the present invention provides a kind of medium-speed pulverizer automatically to regulate the method for fineness of pulverized coal, comprises,
Obtain the parameter of coal pulverizer coal-supplying amount from feeder;
Regulate separator according to the parameter of described coal-supplying amount, control the fineness of coal dust.
A kind of medium-speed pulverizer described according to the embodiment of the present invention regulated a further aspect of fineness of pulverized coal method automatically, and described parameter according to described coal-supplying amount is regulated separator and comprised, regulates the aperture of static separation device baffle plate.
A kind of medium-speed pulverizer described according to the embodiment of the present invention regulated another further aspect of fineness of pulverized coal method automatically, described parameter controllable register aperture according to coal-supplying amount, thereby the fineness of carrying out coal dust control and to refer to, regulate according to following:
During at [10,20] t/h, the aperture of described static separation device baffle plate is 45% of the whole apertures of baffle plate when coal-supplying amount;
When coal-supplying amount during at (20,60) t/h, the aperture of described static separation device baffle plate is,
Wherein x is coal-supplying amount, and y is baffle opening;
During at [60,70] t/h, described static separation device baffle opening is 65% of the whole apertures of baffle plate when coal-supplying amount.
A kind of medium-speed pulverizer described according to the embodiment of the present invention regulated another further aspect of fineness of pulverized coal method automatically, and described parameter according to described coal-supplying amount is regulated separator and comprised, regulates the rotating speed of dynamic separator impeller motor.
A kind of medium-speed pulverizer described according to the embodiment of the present invention regulated another further aspect of fineness of pulverized coal method automatically, described parameter according to coal-supplying amount is regulated the separator motor speed, thereby the fineness of carrying out coal dust is controlled and is referred to, regulates according to following:
During at [10,20] t/h, described dynamic separator motor speed is 600rpm when coal-supplying amount;
When coal-supplying amount during at (20,60) t/h, described dynamic separator motor speed is, y=700-5x, and wherein x is coal-supplying amount, y is motor speed;
During at [60,70] t/h, described dynamic separator motor speed is 400rpm when coal-supplying amount.
The embodiment of the present invention also provides a kind of medium-speed pulverizer automatically to regulate the device of fineness of pulverized coal, comprises,
Parameter acquiring unit, processing unit, driver element;
Described parameter acquiring unit is connected with described processing unit, and described driver element is connected with described processing unit, and described driver element is connected with the separator of coal pulverizer;
Described parameter acquiring unit is for obtain the parameter of coal pulverizer coal-supplying amount from feeder;
Described processing unit is used for the parameter according to the adjusted separator of parameter of described coal-supplying amount;
Described driver element is used for according to the parameter of described adjusting separator, separator being regulated, and controls the fineness of coal dust.
A kind of medium-speed pulverizer described according to the embodiment of the present invention regulated a further aspect of fineness of pulverized coal device automatically, and described acquiring unit comprises power plant's operational factor acquisition system.
A kind of medium-speed pulverizer described according to the embodiment of the present invention regulated another further aspect of fineness of pulverized coal device automatically, and described separator comprises the static separation device, perhaps comprises dynamic separator.
A kind of medium-speed pulverizer described according to the embodiment of the present invention regulated another further aspect of fineness of pulverized coal device automatically, and described processing unit carries out following calculating,
When coal-supplying amount during at [10,20] t/h, controlling described 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 during at (20,60) t/h, according to
Wherein x is coal-supplying amount, and y is baffle opening, controls driver element and regulates static separation device baffle opening;
When coal-supplying amount during at [60,70] t/h, controlling described driver, to regulate static separation device baffle opening be 65% of the whole apertures of baffle plate.
A kind of medium-speed pulverizer described according to the embodiment of the present invention regulated another further aspect of fineness of pulverized coal device automatically, and described processing unit carries out following calculating,
During at [10,20] t/h, controlling described dynamic separator motor speed by driver element is 600rpm when coal-supplying amount;
During at (20,60) t/h, according to y=700-5x, wherein x is coal-supplying amount when coal-supplying amount, and y is motor speed, controls the dynamic separator motor speed by driver element;
During at [60,70] t/h, controlling described dynamic separator motor speed by driver element is 400rpm when coal-supplying amount.
By the embodiment of the present invention, can regulate in real time coal pulverizer by computer, regulate separators for different coal-supplying amounts, thereby realize the adjusting to fineness of pulverized coal, so that the economy when coal pulverizer power consumption, coal dust firing reaches effect preferably.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Figure 1 shows that the structure chart of coal pulverizer in prior art;
Figure 2 shows that a kind of medium-speed pulverizer of the embodiment of the present invention regulates the method flow diagram of fineness of pulverized coal automatically;
Figure 3 shows that a kind of medium-speed pulverizer of the embodiment of the present invention regulates the device schematic diagram of fineness of pulverized coal automatically;
Fig. 4 a is depicted as the graph of relation between embodiment of the present invention separator baffle opening and coal-supplying amount;
Fig. 4 b is embodiment of the present invention separator motor speed and coal-supplying amount Relations Among curve map;
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
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Be illustrated in figure 2 as a kind of medium-speed pulverizer of the embodiment of the present invention and automatically regulate the method flow diagram of fineness of pulverized coal.
Comprise step 201, obtain the parameter of coal pulverizer coal-supplying amount by the operational factor of feeder.Wherein, feeder can provide the coal-supplying amount parameter to coal pulverizer, and this coal-supplying amount is general also all through periodic calibrating.
As one embodiment of the present of invention, to regulate described separator and comprise, the aperture of controllable register is perhaps regulated the rotating speed of separator impeller motor.Wherein, the aperture of described static separation device baffle plate is larger, and described fineness of pulverized coal is larger, and described static separation device baffle opening is less, and described fineness of pulverized coal is less; The rotating speed of described dynamic separator motor is faster, and described fineness of pulverized coal is larger, and the rotating speed of described motor is lower, and described fineness of pulverized coal is less.Wherein, fineness is large, refers to that grain diameter is large; Fineness is little, refers to that grain diameter is little.
Described parameter according to coal-supplying amount is regulated static separation device baffle opening, thus the fineness of carrying out coal dust control and refer to, regulate according to following:
When [10,20] t/h (ton/per hour), the aperture of described static separation device baffle plate is 45% of the whole apertures of baffle plate when coal-supplying amount;
When coal-supplying amount during at (20,60) t/h, the aperture of described static separation device baffle plate is,
Wherein x is coal-supplying amount, and y is baffle opening;
During at [60,70] t/h, described static separation device baffle opening is 65% of the whole apertures of baffle plate when coal-supplying amount.
Described parameter according to coal-supplying amount is regulated the dynamic separator motor speed, thus the fineness of carrying out coal dust control and refer to, regulate according to following:
During at [10,20] t/h, described dynamic separator motor speed is 600rpm (rotating speed per minute) when coal-supplying amount;
When coal-supplying amount during at (20,60) t/h, described dynamic separator motor speed is, y=700-5x, and wherein x is coal-supplying amount, y is motor speed;
During at [60,70] t/h, described dynamic separator motor speed is 400rpm when coal-supplying amount.
Can avoid by above-mentioned control that separator does not change because coal-supplying amount changes, become large problem thereby cause the coal pulverizer live load to become large power consumption, reach the economy of coal pulverizer optimum.
Be illustrated in figure 3 as a kind of medium-speed pulverizer of the embodiment of the present invention and automatically regulate the device schematic diagram of fineness of pulverized coal.
Comprise parameter acquiring unit 301, processing unit 302, driver element 303.
Described parameter acquiring unit 301 is connected with described processing unit 302, and described driver element 303 is connected with described processing unit 302, and described driver element 303 is connected with separator for coal mill.
Driver element 303 is used for according to the parameter of described adjusting separator, separator being regulated, and controls the fineness of coal dust.Wherein, driver element 303 directly with the static separation device in baffle plate or the motor of dynamic separator be connected, when being connected with static separation device baffle plate, be depicted as the structure chart of the utility model static separation device and driver element as Fig. 5 a, this driver element 303 can be for by motor-driven rotating member, (in prior art, baffle plate has a manual aperture control assembly to drive the original adjusting parts of baffle plate according to the parameter of regulating separator, these parts are regulated aperture with manual wrench) be rotated, thus the aperture that can regulate described baffle plate; When described driver element 303 is connected with the motor of dynamic separator, be depicted as the structure chart of the utility model dynamic separator and driver element as Fig. 5 b, this driver element can send the parameter of described adjusting dynamic separator the vane type rotary motor of described dynamic separator in the mode of controlling electric current, for example this driver element can be digital analog converter, the digital parameters of processor output is converted to the analog signal that separator vane type motor can be identified, thereby control the rotation of this motor, thereby can regulate fineness of pulverized coal.
Described processing unit 302 carries out following calculating, obtains the parameter for the different adjusting separator of different coal-supplying amounts,
When [10,20] t/h (ton/per hour), the aperture of controlling described driver element 303 adjusting static separation device baffle plates is 45% of the whole apertures of baffle plate when coal-supplying amount;
When coal-supplying amount during at (20,60) t/h, according to
Wherein x is coal-supplying amount, and y is baffle opening, controls driver element 303 and regulates static separation device baffle opening;
When coal-supplying amount during at [60,70] t/h, controlling described driver 303, to regulate static separation device baffle openings be 65% of the whole apertures of baffle plate.
Perhaps, described processing unit 302 carries out following calculating, obtains the parameter for the different adjusting separator of different coal-supplying amounts,
During at [10,20] t/h, controlling described dynamic separator motor speeds by driver element 303 is 600rpm (rotating speed per minute) when coal-supplying amount;
During at (20,60) t/h, according to y=700-5x, wherein x is coal-supplying amount when coal-supplying amount, and y is motor speed, controls the dynamic separator motor speeds by driver element 303;
During at [60,70] t/h, controlling described dynamic separator motor speeds by driver element 303 is 400rpm when coal-supplying amount.
By above-described embodiment, can regulate in real time coal pulverizer by computer, regulate separators for different coal-supplying amounts, thereby realize the adjusting to fineness of pulverized coal, so that the economy when coal pulverizer power consumption, coal dust firing reaches effect preferably.
Be depicted as graph of relation between embodiment of the present invention separator baffle opening and coal-supplying amount as Fig. 4 a, Fig. 4 b is embodiment of the present invention separator motor speed and coal-supplying amount Relations Among curve map, be directed to the separator of baffle type or the separator of motor-driven rotation type, just can so that reach balance between the fineness of coal dust and corresponding coal-supplying amount, make the economy of coal pulverizer get a promotion according to above curve controlled separator.
The above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above is only the specific embodiment of the present invention; the protection domain that is not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the method that medium-speed pulverizer is regulated fineness of pulverized coal automatically, is characterized in that comprising,
Obtain the parameter of coal pulverizer coal-supplying amount from feeder;
Regulate separator according to the parameter of described coal-supplying amount, control the fineness of coal dust.
2. a kind of medium-speed pulverizer according to claim 1 method of automatically regulating fineness of pulverized coal, is characterized in that, described parameter according to described coal-supplying amount is regulated separator and comprised, regulates the aperture of static separation device baffle plate.
3. a kind of medium-speed pulverizer according to claim 2 method of automatically regulating fineness of pulverized coal, is characterized in that, described parameter controllable register aperture according to coal-supplying amount, thereby the fineness of carrying out coal dust control and refer to, regulate according to following:
During at [10,20] t/h, the aperture of described static separation device baffle plate is 45% of the whole apertures of baffle plate when coal-supplying amount;
When coal-supplying amount during at (20,60) t/h, the aperture of described static separation device baffle plate is,
Wherein x is coal-supplying amount, and y is baffle opening;
During at [60,70] t/h, described static separation device baffle opening is 65% of the whole apertures of baffle plate when coal-supplying amount.
4. a kind of medium-speed pulverizer according to claim 1 method of automatically regulating fineness of pulverized coal, is characterized in that, described parameter according to described coal-supplying amount is regulated separator and comprised, regulates the rotating speed of dynamic separator impeller motor.
5. a kind of medium-speed pulverizer according to claim 4 method of automatically regulating fineness of pulverized coal, is characterized in that, described parameter according to coal-supplying amount is regulated the separator motor speed, thus the fineness of carrying out coal dust control and refer to, regulate according to following:
During at [10,20] t/h, described dynamic separator motor speed is 600rpm when coal-supplying amount;
When coal-supplying amount during at (20,60) t/h, described dynamic separator motor speed is, y=700-5x, and wherein x is coal-supplying amount, y is motor speed;
During at [60,70] t/h, described dynamic separator motor speed is 400rpm when coal-supplying amount.
6. 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;
Described parameter acquiring unit is connected with described processing unit, and described driver element is connected with described processing unit, and described driver element is connected with the separator of coal pulverizer;
Described parameter acquiring unit is for obtain the parameter of coal pulverizer coal-supplying amount from feeder;
Described processing unit is used for the parameter according to the adjusted separator of parameter of described coal-supplying amount;
Described driver element is used for according to the parameter of described adjusting separator, separator being regulated, and controls the fineness of coal dust.
7. a kind of medium-speed pulverizer according to claim 6 is regulated the device of fineness of pulverized coal automatically, it is characterized in that, described acquiring unit comprises power plant's operational factor acquisition system.
8. a kind of medium-speed pulverizer according to claim 6 is regulated the device of fineness of pulverized coal automatically, it is characterized in that, described separator comprises the static separation device, perhaps comprises dynamic separator.
9. a kind of medium-speed pulverizer according to claim 8 is regulated the device of fineness of pulverized coal automatically, it is characterized in that, described processing unit carries out following calculating,
When coal-supplying amount during at [10,20] t/h, controlling described 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 during at (20,60) t/h, according to
Wherein x is coal-supplying amount, and y is baffle opening, controls driver element and regulates static separation device baffle opening;
When coal-supplying amount during at [60,70] t/h, controlling described driver, to regulate static separation device baffle opening be 65% of the whole apertures of baffle plate.
10. a kind of medium-speed pulverizer according to claim 8 is regulated the device of fineness of pulverized coal automatically, it is characterized in that, described processing unit carries out following calculating,
During at [10,20] t/h, controlling described dynamic separator motor speed by driver element is 600rpm when coal-supplying amount;
During at (20,60) t/h, according to y=700-5x, wherein x is coal-supplying amount when coal-supplying amount, and y is motor speed, controls the dynamic separator motor speed by driver element;
During at [60,70] t/h, controlling described dynamic separator motor speed by driver element is 400rpm when coal-supplying amount.
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| CN103969072A (en) * | 2014-05-13 | 2014-08-06 | 国家电网公司 | Method for testing efficiency of pulverized coal separator of four-corner tangential firing boiler |
| CN106391286A (en) * | 2016-08-31 | 2017-02-15 | 珠海市华远自动化科技有限公司 | System and method for controlling fineness of pulverized coal |
| CN109046735A (en) * | 2018-10-24 | 2018-12-21 | 江苏丰尚智能科技有限公司 | A kind of crushing and processing automatically adjust the devices and methods therefor of product granularity in the process |
| CN109442463A (en) * | 2018-09-19 | 2019-03-08 | 安徽华电六安电厂有限公司 | A kind of coal pulverizer fineness of pulverized coal adjusting 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 |
| CN110345466A (en) * | 2019-07-09 | 2019-10-18 | 南京博沃科技发展有限公司 | A method of water wall high temperature corrosion in furnace is alleviated by the control of full load fineness of pulverized coal |
| CN110848727A (en) * | 2019-12-04 | 2020-02-28 | 国网浙江省电力有限公司电力科学研究院 | Adjusting method for improving boiler load response rate |
| CN112742544A (en) * | 2020-12-07 | 2021-05-04 | 国家能源集团山东石横热电有限公司 | Debugging method and system for dynamic separator of medium-speed coal mill |
| CN112934452A (en) * | 2021-02-02 | 2021-06-11 | 浙江浙能技术研究院有限公司 | Method for adjusting and real-time controlling pulverized coal fineness of medium-speed coal mill based on rare earth motor variable speed |
| CN113333144A (en) * | 2021-07-20 | 2021-09-03 | 浙江浙能技术研究院有限公司 | Method for reducing minimum output of medium-speed coal mill based on rare earth motor frequency conversion adjustment |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969072A (en) * | 2014-05-13 | 2014-08-06 | 国家电网公司 | Method for testing efficiency of pulverized coal separator of four-corner tangential firing boiler |
| CN103969072B (en) * | 2014-05-13 | 2017-02-22 | 国家电网公司 | Method for testing efficiency of pulverized coal separator of four-corner tangential firing boiler |
| CN106391286A (en) * | 2016-08-31 | 2017-02-15 | 珠海市华远自动化科技有限公司 | System and method for controlling fineness of pulverized coal |
| CN109442463A (en) * | 2018-09-19 | 2019-03-08 | 安徽华电六安电厂有限公司 | A kind of coal pulverizer fineness of pulverized coal adjusting method |
| CN109046735A (en) * | 2018-10-24 | 2018-12-21 | 江苏丰尚智能科技有限公司 | A kind of crushing and processing automatically adjust the devices and methods therefor of product granularity in the process |
| 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 |
| CN110345466A (en) * | 2019-07-09 | 2019-10-18 | 南京博沃科技发展有限公司 | A method of water wall high temperature corrosion in furnace is alleviated by the control of full load fineness of pulverized coal |
| CN110848727A (en) * | 2019-12-04 | 2020-02-28 | 国网浙江省电力有限公司电力科学研究院 | Adjusting method for improving boiler load response rate |
| CN112742544A (en) * | 2020-12-07 | 2021-05-04 | 国家能源集团山东石横热电有限公司 | Debugging method and system for dynamic separator of medium-speed coal mill |
| CN112934452A (en) * | 2021-02-02 | 2021-06-11 | 浙江浙能技术研究院有限公司 | Method for adjusting and real-time controlling pulverized coal fineness of medium-speed coal mill based on rare earth motor variable speed |
| CN112934452B (en) * | 2021-02-02 | 2022-04-26 | 浙江浙能技术研究院有限公司 | Method for adjusting and real-time controlling pulverized coal fineness of medium-speed coal mill based on rare earth motor variable speed |
| CN113333144A (en) * | 2021-07-20 | 2021-09-03 | 浙江浙能技术研究院有限公司 | Method for reducing minimum output of medium-speed coal mill based on rare earth motor frequency conversion adjustment |
| CN113333144B (en) * | 2021-07-20 | 2022-05-31 | 浙江浙能技术研究院有限公司 | Method for reducing minimum output of medium-speed coal mill based on rare earth motor frequency conversion adjustment |
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