CN104374675B - A kind of coal pulverizer fineness of pulverized coal on-line monitoring method - Google Patents
A kind of coal pulverizer fineness of pulverized coal on-line monitoring method Download PDFInfo
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- CN104374675B CN104374675B CN201410546473.1A CN201410546473A CN104374675B CN 104374675 B CN104374675 B CN 104374675B CN 201410546473 A CN201410546473 A CN 201410546473A CN 104374675 B CN104374675 B CN 104374675B
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- 239000003245 coal Substances 0.000 title claims abstract description 198
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000012544 monitoring process Methods 0.000 title claims abstract description 23
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 claims description 16
- 239000002817 coal dust Substances 0.000 claims description 12
- 238000013481 data capture Methods 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 4
- 238000007781 pre-processing Methods 0.000 claims description 4
- 238000013502 data validation Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 abstract description 7
- 239000000843 powder Substances 0.000 abstract description 5
- 238000005070 sampling Methods 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012545 processing Methods 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
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
The invention discloses a kind of coal pulverizer fineness of pulverized coal on-line monitoring method, according to the model set up in advance, operation gathers coal pulverizer dynamic separator rotating speed, coal pulverizer inlet primary air flow, feeder coal-supplying amount, coal pulverizer electric current and coal Kazakhstan by DCS system to grind the parameters such as index and current fineness of pulverized coal is estimated, run for pulverized coal preparation system and reference is provided, in coal-powder boiler pulverized coal preparation system, can monitor outlet fineness of pulverized coal, compare the system not monitoring fineness, economy is more preferable；Only utilize in existing service data the relative recording such as DCS data and coal-fired daily record, it is not necessary to special sampling and measurement apparatus, simple and practical, it is to avoid the sampling of physical measuring methods of existing fineness of pulverized coal and the abrasion of measurement apparatus and blockage problem.
Description
Technical field
The present invention relates to a kind of coal pulverizer fineness of pulverized coal on-line monitoring method, specifically a kind of basis
Coal pulverizer operational factor monitors the method for current fineness of pulverized coal, belongs to electric power and power engineering technology field；
It is according to the model set up in advance, by the pulverized coal preparation system separator rotating speed of DCS system, coal-supplying amount,
The parameters such as coal pulverizer inlet primary air flow, coal pulverizer unit consumption, coal grindability index are to current fineness of pulverized coal
Estimating, running for pulverized coal preparation system provides reference.
Background technology
In boiler plant, before coal combustion, generally with coal pulverizer, coal need to be milled into coal dust, to improve combustion
Burn efficiency.Coal dust is the thinnest, and ash content carbon is the lowest, and efficiency of combustion is the highest, but powder process power consumption is got over simultaneously
Greatly.Accordingly, there exist an optimal fineness of pulverized coal, now the heat loss due to incomplete combustion of unit and powder process
Power consumption summation minimizes.For different atures of coal, the optimal fineness of pulverized coal of its correspondence is different.But mesh
Front engineer applied does not carry out on-line measurement to fineness of pulverized coal, the most also cannot be carried out regulating in real time,
Making fineness of pulverized coal off-target value, coal dust is partially thin, and powder process power consumption is higher, and coal dust is partially thick, burning effect
Rate is low, and both of which will cause Boiler Economical Operation to reduce.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of coal pulverizer
Fineness of pulverized coal on-line monitoring method, to help operations staff or control system that fineness of pulverized coal is controlled,
Ensure under the economical finesse that pulverized coal preparation system operates in coal dust, improve pulverized coal preparation system and the economy of boiler operatiopn
Property.
Technical scheme: for solving above-mentioned technical problem, the technical solution used in the present invention is:
A kind of coal pulverizer fineness of pulverized coal on-line monitoring method, it is characterised in that: fineness of pulverized coal on-line monitoring
System includes data capture unit, data pre-processing unit, fineness of pulverized coal computing unit；Method includes
Following steps:
1) before use, first carry out coal pulverizer to become dynamic separator speed test, become coal pulverizer inlet one
The test of secondary air quantity, change pulverizer capacity test, gather separator rotating speed, coal pulverizer inlet one during test
Secondary air quantity, feeder coal-supplying amount, coal pulverizer electric current and coal Kazakhstan can grind exponent data, and take coal dust
Sample carries out fineness of pulverized coal off-line measurement, then uses method of least square to determine model parameter k1,k2,k3,k4；
Wherein k1,k2,k3,k4Being coefficient, concrete value is determined by test；
2), when coal pulverizer is properly functioning, gathered from coal pulverizer service data by data capture unit
Dynamic separator rotating speed, coal pulverizer inlet primary air flow, feeder coal-supplying amount, coal pulverizer electric current and/or
Coal pulverizer power, currently grinds coal；
3) data obtained data capture unit by data processing unit carry out pretreatment, including
To dynamic separator rotating speed, coal pulverizer inlet primary air flow, feeder coal-supplying amount, coal pulverizer electric current and/
Or coal pulverizer power is filtered, carries out data validation, and calculate coal pulverizer unit consumption, look into and take
The coal Kazakhstan currently grinding coal can grind index；
4) pretreated data are included: dynamic separator rotating speed, coal pulverizer inlet primary air flow,
Feeder coal-supplying amount, coal pulverizer electric current, coal pulverizer unit consumption, coal Kazakhstan can grind index, import coal dust thin
Degree computing unit calculates, and obtains fineness of pulverized coal.
Described a kind of coal pulverizer fineness of pulverized coal on-line monitoring method, it is characterised in that: described coal dust is thin
The computing formula of degree computing unit is:
Wherein: B feeder coal-supplying amount, unit t/h；N separator rotating speed, unit r/min；Q
Coal pulverizer inlet primary air flow, unit t/h；HGI coal Kazakhstan can grind index；Em coal pulverizer list
Consumption, unit kWh/t；R90Fineness of pulverized coal, %.
Described a kind of coal pulverizer fineness of pulverized coal on-line monitoring method, it is characterised in that: k1Span is
4.5-5.5, k2Span is 170-230, k3,k4Span because of separator and coal pulverizer model and
Different, k1,k2,k3,k4Concrete value is determined by scene test.
Described a kind of coal pulverizer fineness of pulverized coal on-line monitoring method, it is characterised in that: described coal pulverizer list
Consumption Em=P/B, P are coal pulverizer power, B feeder coal-supplying amount, all can be from coal pulverizer service data
Middle acquisition, or calculated by the coal pulverizer electric current obtained and voltage.
Preferably, described a kind of coal pulverizer fineness of pulverized coal on-line monitoring method, it is characterised in that:
Described coal pulverizer is the medium-speed pulverizer of band dynamic separator.
Preferably, described a kind of coal pulverizer fineness of pulverized coal on-line monitoring method, it is characterised in that:
Coal pulverizer service data includes: dynamic separator rotating speed, coal pulverizer inlet primary air flow, feeder to
Coal amount, coal pulverizer electric current, coal pulverizer power, currently grind coal.
Beneficial effect: a kind of coal pulverizer fineness of pulverized coal on-line monitoring method that the present invention provides, for coal dust
In stove pulverized coal preparation system, outlet fineness of pulverized coal can be monitored, compare the system not monitoring fineness, economy
More preferably；And this method only utilizes the relative recording such as DCS data and coal-fired daily record in existing service data,
Without special sampling and measurement apparatus, simple and practical, solve existing in longtime running, coal
Sampling that the physical measuring methods of powder fineness exists and the abrasion of measurement apparatus and blockage problem.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is further described.
As it is shown in figure 1, be a kind of coal pulverizer fineness of pulverized coal on-line monitoring method, fineness of pulverized coal is supervised online
Examining system includes data capture unit 2, data pre-processing unit 3, fineness of pulverized coal computing unit 4；Side
Method comprises the following steps:
1) experiment determines model parameter 1: before use, first carries out coal pulverizer and becomes dynamic separator rotating speed
Test, change coal pulverizer inlet primary air flow test, change pulverizer capacity test, gather separation during test
Device rotating speed, coal pulverizer inlet primary air flow, feeder coal-supplying amount, coal pulverizer electric current and coal Kazakhstan can be ground
Exponent data, and coal dust sampling is carried out fineness of pulverized coal off-line measurement, then use method of least square or
Other parameter optimization methods determine model parameter k1,k2,k3,k4；Wherein k1,k2,k3,k4It is coefficient, tool
Body value is determined by test；k1Span is 4.5-5.5, k2Span is 170-230, k3,k4
Span is different because of separator and coal pulverizer model.
Such as: embodiment one, coal pulverizer model is HP1203/Dyn, k1=4.9, k2=198, k3=0.18,
k4=120.
2) when coal pulverizer is properly functioning, by data capture unit 2 DCS from coal pulverizer service data
System and coal-fired log collection dynamic separator rotating speed, coal pulverizer inlet primary air flow, feeder coal supply
Amount, coal pulverizer electric current and/or coal pulverizer power, currently grind coal；
3) data obtained data capture unit by data processing unit 3 carry out pretreatment, including
To dynamic separator rotating speed, coal pulverizer inlet primary air flow, feeder coal-supplying amount, coal pulverizer electric current and/
Or coal pulverizer power is filtered, carries out data validation, and calculate coal pulverizer unit consumption, look into and take
The coal Kazakhstan currently grinding coal can grind index；
Described coal pulverizer unit consumption Em=P/B, P are coal pulverizer power, B feeder coal-supplying amount, all can be from
In coal pulverizer service data obtain, coal pulverizer power therein also can by obtain coal pulverizer electric current and
Voltage calculates.
4) pretreated data are included: dynamic separator rotating speed, coal pulverizer inlet primary air flow,
Feeder coal-supplying amount, coal pulverizer electric current, coal pulverizer unit consumption, coal Kazakhstan can grind index, import coal dust thin
Degree computing unit 4 calculates, and obtains fineness of pulverized coal.
The computing formula of described fineness of pulverized coal computing unit is:
Wherein: B feeder coal-supplying amount, unit t/h；N separator rotating speed, unit r/min；Q
Coal pulverizer inlet primary air flow, unit t/h；HGI coal Kazakhstan can grind index；Em coal pulverizer list
Consumption, unit kWh/t；R90Fineness of pulverized coal, %.
Described a kind of coal pulverizer fineness of pulverized coal on-line monitoring method, it is characterised in that: described coal pulverizer is
Medium-speed pulverizer with dynamic separator.
Described a kind of coal pulverizer fineness of pulverized coal on-line monitoring method, it is characterised in that: coal pulverizer runs number
According to including: dynamic separator rotating speed, coal pulverizer inlet primary air flow, feeder coal-supplying amount, coal pulverizer
Electric current, coal pulverizer power, currently grind coal.
The above is only the preferred embodiment of the present invention, it should be pointed out that: for the art
For those of ordinary skill, under the premise without departing from the principles of the invention, it is also possible to make some improvement
And retouching, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (5)
1. a coal pulverizer fineness of pulverized coal on-line monitoring method, it is characterised in that: fineness of pulverized coal is supervised online
Examining system includes data capture unit, data pre-processing unit, fineness of pulverized coal computing unit；Method bag
Include following steps:
1) before use, first carry out coal pulverizer to become dynamic separator speed test, become coal pulverizer inlet one
The test of secondary air quantity, change pulverizer capacity test, gather separator rotating speed, coal pulverizer inlet one during test
Secondary air quantity, feeder coal-supplying amount, coal pulverizer electric current and coal Kazakhstan can grind exponent data, and take coal dust
Sample carries out fineness of pulverized coal off-line measurement, then uses method of least square to determine model parameter k1,k2,k3,k4；
Wherein k1,k2,k3,k4Being coefficient, concrete value is determined by test；
When 2) coal pulverizer is properly functioning, gathered from coal pulverizer service data by data capture unit,
Coal pulverizer inlet primary air flow, feeder coal-supplying amount, coal pulverizer electric current and/or coal pulverizer power, currently
Grind coal；
3) data obtained data capture unit by data pre-processing unit carry out pretreatment, bag
Include to separator rotating speed, coal pulverizer inlet primary air flow, feeder coal-supplying amount, coal pulverizer electric current and/or
Coal pulverizer power is filtered, and carries out data validation, and calculates coal pulverizer unit consumption, looks into take and works as
Before grind the coal Kazakhstan of coal and can grind index；
4) pretreated data are included: separator rotating speed, coal pulverizer inlet primary air flow, coal supply
Machine coal-supplying amount, coal pulverizer electric current, coal pulverizer unit consumption, coal Kazakhstan can grind index, import fineness of pulverized coal meter
Calculate unit to calculate, obtain fineness of pulverized coal；The computing formula of described fineness of pulverized coal computing unit is:
Wherein: B feeder coal-supplying amount, unit t/h；N separator rotating speed, unit r/min；Q
Coal pulverizer inlet primary air flow, unit t/h；HGI coal Kazakhstan can grind index；Em coal pulverizer list
Consumption, unit kWh/t；R90Fineness of pulverized coal, %.
A kind of coal pulverizer fineness of pulverized coal on-line monitoring method the most according to claim 1, its feature
It is: k1Span is 4.5-5.5, k2Span is 170-230, k3,k4Span is because dividing
Different from device and coal pulverizer model.
A kind of coal pulverizer fineness of pulverized coal on-line monitoring method the most according to claim 1, its feature
It is: described coal pulverizer unit consumption Em=P/B, P are coal pulverizer power, B feeder coal-supplying amount, all
Can obtain from coal pulverizer service data.
A kind of coal pulverizer fineness of pulverized coal on-line monitoring method the most according to claim 1, its feature
It is: described coal pulverizer is the medium-speed pulverizer of band dynamic separator.
A kind of coal pulverizer fineness of pulverized coal on-line monitoring method the most according to claim 1, its feature
It is: coal pulverizer service data includes: separator rotating speed, coal pulverizer inlet primary air flow, feeder
Coal-supplying amount, coal pulverizer electric current, coal pulverizer power, currently grind coal.
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| CN104374675B true CN104374675B (en) | 2016-10-26 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN107767056A (en) * | 2017-10-25 | 2018-03-06 | 上海电气上重碾磨特装设备有限公司 | A kind of condition monitoring for power station coal pulverizer with it is health management system arranged |
| CN108636586B (en) * | 2018-04-12 | 2020-05-05 | 中国神华能源股份有限公司 | Method and device for determining output correction coefficient of coal mill |
| CN109107744B (en) * | 2018-06-15 | 2020-09-01 | 东南大学 | Medium-speed mill air-coal ratio and oil pressure dynamic optimization-approaching adjusting method |
| CN109541168B (en) * | 2018-11-26 | 2021-09-21 | 江苏方天电力技术有限公司 | Coal powder economic fineness on-line monitoring and adjusting method |
| CN110598364B (en) * | 2019-09-30 | 2023-02-28 | 西安热工研究院有限公司 | Method for calculating grinding output of ZGM type medium-speed coal mill |
| CN110598365B (en) * | 2019-09-30 | 2023-02-28 | 西安热工研究院有限公司 | Method for calculating grinding output of MP-G type medium-speed coal mill |
| CN111612210A (en) * | 2020-04-10 | 2020-09-01 | 杭州电子科技大学 | Online optimization method for coal powder fineness of coal mill |
| CN112742544B (en) * | 2020-12-07 | 2022-05-17 | 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 |
| CN113792255B (en) * | 2021-11-17 | 2022-02-22 | 西安热工研究院有限公司 | Method for calculating coal mill outlet coal powder fineness on line based on power plant big data |
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