CN103920578B - A kind of measuring method of coal pulverizer inlet ventilation - Google Patents
A kind of measuring method of coal pulverizer inlet ventilation Download PDFInfo
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- CN103920578B CN103920578B CN201310012709.9A CN201310012709A CN103920578B CN 103920578 B CN103920578 B CN 103920578B CN 201310012709 A CN201310012709 A CN 201310012709A CN 103920578 B CN103920578 B CN 103920578B
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Abstract
The invention discloses the flexible measurement method of coal pulverizer inlet ventilation, the measuring process of the flexible measurement method is：First preset coal pulverizer inlet ventilation G（t/h）, complete coal pulverizer inlet wind-warm syndrome Ti1（℃）Calculating after, computing unit triggering extraction storage coal pulverizer inlet temperature Ti（℃）, compared with coal pulverizer inlet wind-warm syndrome Ti1 is calculated, coal pulverizer inlet wind-warm syndrome difference dTi is calculated, and stored；After coal pulverizer inlet wind-warm syndrome difference dTi calculating is completed, computing unit extracts the coal pulverizer inlet wind-warm syndrome difference dTi of storage by triggering, and it is judged compared with 1：If dTi ＜ 1, default coal pulverizer inlet ventilation G（t/h）For the actual ventilation of now coal pulverizer inlet；If dTi >=1, default coal pulverizer inlet ventilation G（t/h）Mistake, coal pulverizer inlet ventilation value G need to be preset again（t/h）, measurement is until obtain dTi ＜ 1 again.Measurement result precision of the present invention is high, is easy to pulverized coal preparation system running optimizatin to adjust.
Description
Technical field
The present invention relates to a kind of flexible measurement method of ventilation, more particularly to a kind of measurement side of coal pulverizer inlet ventilation
Method.
Background technology
With the increase of thermal power plant unit capacity, coordinate the raising of controlled level, the accurate survey of boiler controller system air quantity
Amount and control seem more important；It is especially inaccurate in the measurement of coal pulverizer inlet air quantity, it can frequently result in air quantity and fuel quantity
Control, boiler load are coordinated etc. to put into automatic, also result in that combustion conditions are bad, and boiler operating efficiency declines, and because of mill
Coal machine ventilation deficiency causes coal pulverizer blocking, tripping operation etc., and hidden danger is brought to safe and economical boiler operation.
Power boiler breeze burner need to keep appropriate coal-air ratio to meet the requirement of safety and economic operation, therefore grind
The apparatus for measuring air quantity that different types are respectively arranged with coal machine inlet conduits is used for the ventilation for measuring coal pulverizer；But actual motion
In, because coal pulverizer inlet air channel straight length is too short or the problem of apparatus for measuring air quantity itself, the result of its air measuring is often
Larger deviation be present, it is even completely unavailable, bring very big difficulty to the adjustment of pulverized coal preparation system running optimizatin.
The content of the invention
The present invention provides for existing coal pulverizer inlet ventilation measurements deviation is big, the very low problem of precision
A kind of coal pulverizer inlet ventilation measuring method of optimization.The measurement result precision of the measuring method is high, is easy to pulverized coal preparation system to transport
Row is optimized and revised.
To reach above-mentioned purpose, technical scheme is as follows：
A kind of measuring method of coal pulverizer inlet ventilation, the measuring method are implemented based on intelligent test device, and it is wrapped
Include following steps：
（1）Measurement apparatus measurement raw coal moisture content Wy in intelligent test device（%）, coal pulverizer inlet temperature Ti（℃）, mill
Coal machine outlet temperature To（℃）, environment temperature Ta（℃）, pulverizer capacity Bm（t/h）And coal pulverizer power P（kW）, and carry out
Storage；
（2）Computing unit in intelligent test device is according to the pattern of coal pulverizer and the raw coal moisture content Wy of measurement（%）Calculate
Corresponding coal pulverizer sealing air quantity Gf（t/h）With the intrinsic moisture content Wmf of coal dust（%）, and stored；
（3）Computing unit is according to the default coal pulverizer inlet ventilation value G of data measured and being calculated（t/
h）, and stored；
（4）The pulverizer outlet temperature To of computing unit triggering extraction storage（℃）And environment temperature Ta（℃）, with original
Coal evaporation moisture content mass flow Dw（kg/s）Carry out that raw coal evaporation moisture content heat absorption Qxr1 is calculated（kJ/s）, and stored；
（5）Raw coal evaporation moisture content heat absorption Qxr1 is being calculated（kJ/s）Afterwards, the coal-grinding of computing unit triggering extraction storage
Machine outlet temperature To（℃）And environment temperature Ta（℃）, coal flow Dmfm in coal dust is exported with coal pulverizer（kg/s）Calculated
Obtain heating the heat absorption Qxr2 of coal in coal dust（kJ/s）, and stored；
（6）The heat absorption Qxr2 of coal in heating coal dust is calculated（kJ/s）Afterwards, the mill of computing unit triggering extraction storage
Coal machine outlet temperature To（℃）With environment temperature Ta（℃）, moisture content flow Dmfw in coal dust is exported with coal pulverizer（kg/s）Counted
Calculate and obtain the heat absorption Qxr3 for heating moisture content in coal dust（kJ/s）, and stored；
（7）The heat absorption Qxr3 of moisture content in heating coal dust is calculated（kJ/s）Afterwards, computing unit triggering extraction stores
Coal pulverizer sealing air quantity Gf（t/h）And pulverizer outlet temperature To（℃）With environment temperature Ta（℃）Carry out that coal-grinding is calculated
Machine sealing air caloric receptivity Qxr4（kJ/s）, and stored；
（8）Coal pulverizer sealing air caloric receptivity Qxr4 is being calculated（kJ/s）Afterwards, the original of computing unit triggering extraction storage
Coal evaporation moisture content heat absorption Qxr1（kJ/s）, heating coal dust in coal heat absorption Qxr2（kJ/s）And heat the heat absorption of moisture content in coal dust
Qxr3（kJ/s）, total caloric receptivity Qxr is calculated with it（kJ/s）, and stored；
（9）Calculating total caloric receptivity Qxr（kJ/s）Afterwards, the coal pulverizer power P of computing unit triggering extraction storage is counted
Calculation, which obtains milling, produces heat Qnm（kJ/s）, and stored；
（10）Heat Qnm is produced milling（kJ/s）After the completion of calculating, computing unit triggering extraction storage takes total heat absorption
Measure Qxr（kJ/s）Carry out that radiation loss Qsr is calculated（kJ/s）, and stored；
（11）Complete radiation loss Qsr（kJ/s）Calculating after, computing unit triggering extraction storage total caloric receptivity Qxr
（kJ/s）, milling produces heat Qnm（kJ/s）, default coal pulverizer inlet ventilation G（t/h）And pulverizer outlet temperature To
（℃）, carry out that coal pulverizer inlet wind-warm syndrome Ti1 is calculated with it（℃）, and stored；
（12）Complete coal pulverizer inlet wind-warm syndrome Ti1（℃）Calculating after, computing unit triggering extraction storage coal pulverizer
Inlet temperature Ti（℃）, carry out that coal pulverizer inlet wind-warm syndrome difference dTi is calculated with it, and stored；
（13）After coal pulverizer inlet wind-warm syndrome difference dTi calculating is completed, computing unit extracts the coal-grinding of storage by triggering
Machine entrance wind-warm syndrome difference dTi, it is judged compared with 1：If dTi ＜ 1, judgment step（3）In default coal pulverizer enter
Mouth ventilation value G（t/h）For the actual ventilation of now coal pulverizer inlet；If dTi >=1, judgment step（3）In default mill
Coal machine entrance ventilation value G（t/h）Mistake, coal pulverizer inlet ventilation value G is preset again（t/h）, repeat step（3）Extremely
（13）, until obtaining dTi ＜ 1；
（14）After the actual ventilation for determining coal pulverizer inlet is calculated, value will be obtained and reach pulverized coal preparation system running optimizatin tune
Whole system, carry out the adjustment operation of pulverized coal preparation system running optimizatin.
In the preferred embodiment of the present invention, the step（4）In raw coal evaporation moisture content mass flow Dw（kg/s）By counting
Calculate the pulverizer capacity Bm of unit extraction storage（t/h）, raw coal moisture content Wy（%）, the intrinsic moisture content Wmf of coal dust（%）Value, is calculated
Obtain and stored.
Further, the step（5）In coal pulverizer outlet coal dust in coal flow Dmfm（kg/s）As follows
Obtain：
（51）The pulverizer capacity Bm of computing unit triggering extraction storage（t/h）, raw coal moisture content Wy（%）, the intrinsic water of coal dust
Part Wmf（%）Value, carry out that raw coal evaporation moisture content mass flow Dw is calculated（kg/s）, and stored；
（52）Raw coal evaporation moisture content mass flow Dw is being calculated（kg/s）Afterwards, coal pulverizer is extracted in computing unit triggering again
Output Bm（t/h）Value, carry out that coal pulverizer outlet pulverized coal mass flow Dmf is calculated with it（kg/s）, and stored；
（53）Coal pulverizer outlet pulverized coal mass flow Dmf is being calculated（kg/s）Afterwards, computing unit triggering extraction storage
The intrinsic moisture content Wmf of coal dust（%）Value, carry out that moisture content flow Dmfw in coal pulverizer outlet coal dust is calculated with it（kg/s）, and
Stored；
（54）The moisture content flow Dmfw in coal pulverizer outlet coal dust is calculated（kg/s）Afterwards, computing unit triggering extraction is deposited
The coal pulverizer outlet pulverized coal mass flow Dmf of storage（kg/s）, carry out that coal flow in coal pulverizer outlet coal dust is calculated with it
Dmfm（kg/s）, and stored.
Further, the step（6）Moisture content flow Dmfw in middle coal pulverizer outlet coal dust（kg/s）As follows
Obtain：
（61）The pulverizer capacity Bm of computing unit triggering extraction storage（t/h）, raw coal moisture content Wy（%）, the intrinsic water of coal dust
Part Wmf（%）Value, carry out that raw coal evaporation moisture content mass flow Dw is calculated（kg/s）, and stored；
（62）Raw coal evaporation moisture content mass flow Dw is being calculated（kg/s）Afterwards, coal pulverizer is extracted in computing unit triggering again
Output Bm（t/h）Value, carry out that coal pulverizer outlet pulverized coal mass flow Dmf is calculated with it（kg/s）, and stored；
（63）Coal pulverizer outlet pulverized coal mass flow Dmf is being calculated（kg/s）Afterwards, computing unit triggering extraction storage
The intrinsic moisture content Wmf of coal dust（%）Value, carry out that moisture content flow Dmfw in coal pulverizer outlet coal dust is calculated with it（kg/s）, and
Stored.
Pass through above-mentioned technical proposal, the beneficial effects of the invention are as follows：
1st, measurement accuracy is reasonable, deviation is small；The present invention grinds the Industrial Analysis data and reality of fire coal according to coal pulverizer
Operational factor, coal pulverizer inlet air quantity is measured indirectly using thermal balance scheme, greatly improve measured coal machine entrance air quantity
Precision, it is very close with actual entry air quantity, greatly facilitate follow-up powder processed and optimize adjustment operation.
2nd, this method can realize the automation of whole measurement process, without manual intervention, greatly improve its efficiency.
3rd, calculating process is simple, easy to implement；For the present invention in addition to raw coal moisture content is the daily manual analysis of power plant, remaining is original
Data are the operational factor routinely monitored in the coal-fired thermal power generation unit of bringing normally into operation, without extra increase measurement point.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the logic diagram of measuring method of the present invention.
Symbol used herein：
Wy：Raw coal moisture content（%）；Ti：Coal pulverizer inlet temperature（℃）；To：Pulverizer outlet temperature（℃）；Ta：Environment temperature
Degree（℃）；Bm：Pulverizer capacity（t/h）；P：Coal-grinding acc power（kW）；Gf：Coal pulverizer seals air quantity（t/h）；Wmf：Coal dust is consolidated
There is moisture content（%）；G：Coal pulverizer inlet ventilation；Dw：Raw coal evaporates moisture content mass flow（kg/s）；Dmf：Coal pulverizer exports coal dust
Mass flow（kg/s）；Dmfw：Moisture content flow in coal pulverizer outlet coal dust（kg/s）；Dmfm：Coal stream in coal pulverizer outlet coal dust
Amount（kg/s）；Qxr1：Raw coal evaporation moisture content heat absorption（kJ/s）；Cps：The average specific heat at constant pressure of water vapour；Cpw：The average of water is determined
Pressure ratio heat；Qxr2：Heat the heat absorption of coal in coal dust（kJ/s）；Cpm：The average specific heat at constant pressure of coal；Qxr3：Heat moisture content in coal dust
Heat absorption（kJ/s）；Qxr4：Coal pulverizer sealing air recepts the caloric（kJ/s）；Cpk：The average specific heat at constant pressure of air；Qxr：Total heat absorption
Amount；Qnm：Mill and produce heat（kJ/s）；K：The heat gain coefficient of milling of coal pulverizer；Qsr：Radiation loss（kJ/s）；Ti1：Coal-grinding
Machine entrance wind-warm syndrome calculated value（℃）；dTi：Coal pulverizer inlet wind-warm syndrome difference.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is expanded on further.
The present invention proposes a kind of Industrial Analysis number that fire coal is ground according to coal pulverizer for the design feature of existing coal pulverizer
According to this and actual operation parameters, and using thermal balance mode come the method that measures coal pulverizer inlet air quantity indirectly.
This method is implemented based on corresponding intelligent device for measuring, and the intelligent device for measuring mainly includes corresponding sensing
Measurement apparatus, calculate center（Or computing unit）And data storage cell.
Wherein, sense measuring device has some sensors, for obtaining the items needed for measurement coal pulverizer inlet air quantity
Initial data, and ensure corresponding precision.
Initial data progress heat Balance Calculation of the calculating center according to measured by sense measuring device enters one's intention as revealed in what one says accordingly
Value.
Data storage cell is used for real-time storage and calculates center（Computing unit）The data being calculated according to instruction.
Accordingly, the measuring method of coal pulverizer inlet ventilation provided by the invention, it is comprised the following steps that（Referring to Fig. 1）：
（1）Measurement apparatus measurement in intelligent test device obtains required initial data：Raw coal moisture content Wy（%）, coal-grinding
Machine inlet temperature Ti（℃）, pulverizer outlet temperature To（℃）, environment temperature Ta（℃）, pulverizer capacity Bm（t/h）And mill
Coal acc power P（kW）, and stored.
These above-mentioned initial data are having in addition to it can utilize corresponding sense measuring device and timely measure to obtain
In body implementation process, except raw coal moisture content Wy（%）Outside, remainder data can according in the coal-fired thermal power generation unit of bringing normally into operation often
The operational factor for advising monitoring obtains, without extra increase measurement point；And raw coal moisture content Wy（%）Upper one class of as-fired coal can be used
Industrial Analysis total moisture grinds the moisture value of fire coal as current operation coal pulverizer.
Wherein, pulverizer capacity Bm（t/h）Represented using coal pulverizer inlet feeder coal amount；Coal pulverizer power P（kW）
Represented using coal pulverizer motor power (output).
（2）After the measurement and storage of initial data is completed, the computing unit in intelligent test device is according to coal pulverizer
Pattern and the raw coal moisture content Wy of measurement（%）Calculate corresponding coal pulverizer sealing air quantity Gf（t/h）With the intrinsic moisture content Wmf of coal dust（%）,
And stored.
In the specific implementation, coal pulverizer sealing air quantity Gf is calculated（t/h）When, meet sealing air in coal pulverizer operation instructions
The number range of flow；Calculating the intrinsic moisture content Wmf of coal dust（%）When, meet《DL/T_466-2004 power stations coal pulverizer and powder processed
Systematic lectotype directive/guide》In regulation.
（3）After DATA REASONING, calculating and the storage of above-mentioned steps is completed, computing unit will be according to measured and calculating
The obtained default coal pulverizer inlet ventilation value G of data（t/h）, and stored.
（4）After the completion of default, computing unit extracts corresponding pulverizer capacity Bm（t/h）, raw coal moisture content Wy（%）, coal dust
Intrinsic moisture content Wmf（%）Value, carry out that raw coal evaporation moisture content mass flow Dw is calculated（kg/s）, and stored；The step
In, evaporate moisture content mass flow Dw for raw coal（kg/s）It can use and formula progress is calculated as below：
Dw（kg/s）=Bm*（Wy-Wmf）/（100-Wmf）/3.6.
（5）Raw coal evaporation moisture content mass flow Dw is being calculated（kg/s）Afterwards, computing unit will trigger and extract coal-grinding again
Machine output Bm（t/h）Value, carry out that coal pulverizer outlet pulverized coal mass flow Dmf is calculated with it（kg/s）, and stored.
In the step, pulverized coal mass flow Dmf is exported for coal pulverizer（kg/s）Calculating, carried out using equation below：
Dmf（kg/s）=Bm/3.6-Dw.
（6）Coal pulverizer outlet pulverized coal mass flow Dmf is being calculated（kg/s）Afterwards, computing unit triggering extraction stores
The intrinsic moisture content Wmf of coal dust（%）Value, carry out that moisture content flow Dmfw in coal pulverizer outlet coal dust is calculated with it（kg/s）, go forward side by side
Row storage.
In the step, moisture content flow Dmfw in coal dust is exported for coal pulverizer（kg/s）Calculating, computing unit is using such as
Lower formula is carried out：
Dmfw（kg/s）=Dmf*Wmf/100.
（7）The moisture content flow Dmfw in coal pulverizer outlet coal dust is calculated（kg/s）Afterwards, computing unit triggering extraction is deposited
The coal pulverizer outlet pulverized coal mass flow Dmf of storage（kg/s）, carry out that coal flow in coal pulverizer outlet coal dust is calculated with it
Dmfm（kg/s）, and stored.
In the step, coal flow Dmfm in coal dust is exported for coal pulverizer（kg/s）Calculating, computing unit is using as follows
Formula is carried out：
Dmfm（kg/s）=Dmf-Dmfw.
（8）The coal flow Dmfm in coal pulverizer outlet coal dust is calculated（kg/s）Afterwards, computing unit triggering extraction storage
Raw coal evaporation moisture content mass flow Dw（kg/s）, pulverizer outlet temperature To（℃）And environment temperature Ta（℃）, counted
Calculation obtains raw coal evaporation moisture content heat absorption Qxr1（kJ/s）, and stored.
In the step, for raw coal evaporation moisture content heat absorption Qxr1（kJ/s）Calculating, computing unit entered using equation below
OK：
Qxr1（kJ/s）=Dw* (2501+Cps*To-Cpw*Ta), wherein Cps be water vapour average specific heat at constant pressure, Cpw
For the average specific heat at constant pressure of water.
（9）Raw coal evaporation moisture content heat absorption Qxr1 is being calculated（kJ/s）Afterwards, the coal-grinding of computing unit triggering extraction storage
Coal flow Dmfm in machine outlet coal dust（kg/s）, pulverizer outlet temperature To（℃）And environment temperature Ta（℃）Calculate
The heat absorption Qxr2 of coal into heating coal dust（kJ/s）, and stored；
In the step, for the heat absorption Qxr2 of coal in heating coal dust（kJ/s）Calculating, computing unit uses equation below
Carry out：
Qxr2（kJ/s）=Dmfm* (To-Ta) * Cpm, wherein Cpm are the average specific heat at constant pressure of coal.
（10）The heat absorption Qxr2 of coal in heating coal dust is calculated（kJ/s）Afterwards, the mill of computing unit triggering extraction storage
Moisture content flow Dmfw in coal machine outlet coal dust（kg/s）, and pulverizer outlet temperature To（℃）With environment temperature Ta（℃）Carry out
The heat absorption Qxr3 of moisture content in heating coal dust is calculated（kJ/s）, and stored.
In the step, for the heat absorption Qxr3 of moisture content in heating coal dust（kJ/s）Calculating, computing unit is using following public
Formula is carried out：
Qxr3（kJ/s）=Dmfw* (To-Ta) * Cpw, wherein Cpw are the average specific heat at constant pressure of water.
（11）The heat absorption Qxr3 of moisture content in heating coal dust is calculated（kJ/s）Afterwards, computing unit triggering extraction stores
Coal pulverizer sealing air quantity Gf（t/h）And pulverizer outlet temperature To（℃）With environment temperature Ta（℃）Carry out that coal-grinding is calculated
Machine sealing air caloric receptivity Qxr4（kJ/s）, and stored；
In the step, for coal pulverizer sealing air caloric receptivity Qxr4（kJ/s）Calculating, computing unit uses equation below
Carry out：
Qxr4（kJ/s）=Gf/3.6* (To-Ta) * Cpk, wherein Cpk are the average specific heat at constant pressure of air.
（12）Coal pulverizer sealing air caloric receptivity Qxr4 is being calculated（kJ/s）Afterwards, the original of computing unit triggering extraction storage
Coal evaporation moisture content heat absorption Qxr1（kJ/s）, heating coal dust in coal heat absorption Qxr2（kJ/s）And heat the heat absorption of moisture content in coal dust
Qxr3（kJ/s）, total caloric receptivity Qxr is calculated with it（kJ/s）, and stored.
In the step, for total caloric receptivity Qxr（kJ/s）Calculating, computing unit using equation below carry out：
Qxr（kJ/s）=Qxr1+Qxr2+Qxr3+Qxr4.
（13）Calculating total caloric receptivity Qxr（kJ/s）Afterwards, the coal pulverizer power P of computing unit triggering extraction storage is counted
Calculation, which obtains milling, produces heat Qnm（kJ/s）, and stored.
In the step, heat Qnm is produced for milling（kJ/s）Calculating, computing unit using equation below carry out：
Qnm（kJ/s）=P*K, wherein K are the heat gain coefficient of milling of coal pulverizer, are chosen according to coal pulverizer type.
（14）Heat Qnm is produced milling（kJ/s）After the completion of calculating, computing unit triggering extraction storage takes total heat absorption
Measure Qxr（kJ/s）Carry out that radiation loss Qsr is calculated（kJ/s）, and stored.
In the step, for radiation loss Qsr（kJ/s）Calculating, computing unit using equation below carry out：
Qsr（kJ/s）=Qxr*0.02.
（15）Complete radiation loss Qsr（kJ/s）Calculating after, computing unit triggering extraction storage total caloric receptivity Qxr
（kJ/s）, milling produces heat Qnm（kJ/s）, default coal pulverizer inlet ventilation G（t/h）And pulverizer outlet temperature To
（℃）, carry out that coal pulverizer inlet wind-warm syndrome Ti1 is calculated with it（℃）, and stored.
In the step, for coal pulverizer inlet wind-warm syndrome Ti1（℃）Calculating, computing unit using equation below carry out：
Ti1（℃）=(Qxr-Qnm+Qsr)/（G/3.6）/Cpk+To.
（16）Complete coal pulverizer inlet wind-warm syndrome Ti1（℃）Calculating after, computing unit triggering extraction storage coal pulverizer
Inlet temperature Ti（℃）, carry out that coal pulverizer inlet wind-warm syndrome difference dTi is calculated with it, and stored.
In the step, the calculating for coal pulverizer inlet wind-warm syndrome difference dTi, computing unit is carried out using equation below：
dTi=abs（Ti1-Ti）, wherein abs () is ABS function.
（17）After coal pulverizer inlet wind-warm syndrome difference dTi calculating is completed, computing unit extracts the coal-grinding of storage by triggering
Machine entrance wind-warm syndrome difference dTi, it is judged compared with 1：If dTi ＜ 1, judgment step（3）In default coal pulverizer enter
Mouth ventilation value G（t/h）For the actual ventilation of now coal pulverizer inlet；If dTi >=1, judgment step（3）In default mill
Coal machine entrance ventilation value G（t/h）Mistake, coal pulverizer inlet ventilation value G is preset again（t/h）, repeat step（3）Extremely
（17）, until obtaining dTi ＜ 1.
Carrying out reseting coal pulverizer inlet ventilation value G in the step（t/h）When, computing unit can be to default mill before
Coal machine entrance ventilation value G（t/h）Caused influence is analyzed in calculating process, analyzes excessive during its preset value or mistake
It is small, and accurately preset according to analysis result, avoid it is excessive compute repeatedly, greatly improve calculating speed.
（18）After the actual ventilation for determining coal pulverizer inlet is calculated, value will be obtained and reach pulverized coal preparation system running optimizatin tune
Whole system, carry out the adjustment operation of pulverized coal preparation system running optimizatin.
In examples detailed above, calculating measurement is carried out successively according to above-mentioned particular step, and pass through touching successively between each step
Hair can realize the intellectuality and automation of whole measurement process, and can simplify measuring process, avoid redundant measurement step
Appearance, the measurement efficiency greatly improved.
Meanwhile the result in each measuring process is calculated using corresponding calculation formula, can effectively be protected
The accuracy that result is obtained in each step is demonstrate,proved, so as to ensure the accuracy of final measurement.
Examples detailed above can provide one for combustion adjustment and lead to when actual ventilation measuring cell can not provide reference
The accurate measurement method of air quantity.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (4)
- A kind of 1. measuring method of coal pulverizer inlet ventilation, it is characterised in that the measuring method be based on intelligent test device come Implement, it comprises the following steps：(1) measurement apparatus measurement raw coal moisture content Wy (%), coal pulverizer inlet temperature Ti (DEG C), the coal pulverizer in intelligent test device Outlet temperature To (DEG C), environment temperature Ta (DEG C), pulverizer capacity Bm (t/h) and coal pulverizer power P (kW), and deposited Storage；(2) computing unit in intelligent test device calculates corresponding according to the pattern of coal pulverizer and the raw coal moisture content Wy (%) of measurement Coal pulverizer sealing air quantity Gf (t/h) and the intrinsic moisture content Wmf (%) of coal dust, and stored；(3) computing unit presets a coal pulverizer inlet ventilation G (t/h) according to data measured and being calculated, goes forward side by side Row storage；(4) the pulverizer outlet temperature To (DEG C) and environment temperature Ta (DEG C) of computing unit triggering extraction storage, steams with raw coal Shampoo part mass flow Dw (kg/s) carries out that raw coal evaporation moisture content heat absorption Qxr1 (kJ/s) is calculated, and is stored；(5) after raw coal evaporation moisture content heat absorption Qxr1 (kJ/s) is calculated, the coal pulverizer of computing unit triggering extraction storage goes out Mouth temperature To (DEG C) and environment temperature Ta (DEG C), export coal flow Dmfm (kg/s) in coal dust with coal pulverizer and be calculated The heat absorption Qxr2 (kJ/s) of coal in coal dust is heated, and is stored；(6) it is being calculated in heating coal dust after the heat absorption Qxr2 (kJ/s) of coal, the coal pulverizer of computing unit triggering extraction storage Outlet temperature To (DEG C) and environment temperature Ta (DEG C), export moisture content flow Dmfw (kg/s) in coal dust with coal pulverizer and calculate The heat absorption Qxr3 (kJ/s) of moisture content into heating coal dust, and stored；(7) it is being calculated in heating coal dust after the heat absorption Qxr3 (kJ/s) of moisture content, the coal-grinding of computing unit triggering extraction storage Secret envelope air quantity Gf (t/h) and pulverizer outlet temperature To (DEG C) and environment temperature Ta (DEG C) carries out that coal-grinding secret is calculated Wind caloric receptivity Qxr4 (kJ/s) is sealed, and is stored；(8) after coal pulverizer sealing air caloric receptivity Qxr4 (kJ/s) is calculated, the raw coal of computing unit triggering extraction storage steams Flood part heat absorption Qxr1 (kJ/s), heating coal dust in coal heat absorption Qxr2 (kJ/s) and heating coal dust in moisture content heat absorption Qxr3 (kJ/s) total caloric receptivity Qxr (kJ/s), is calculated with coal pulverizer sealing air caloric receptivity Qxr4 (kJ/s), and is stored；(9) after total caloric receptivity Qxr (kJ/s) is calculated, the coal pulverizer power P of computing unit triggering extraction storage calculate Heat Qnm (kJ/s) is produced to milling, and is stored；In the step, heat Qnm (kJ/s) calculating is produced for milling, computing unit is carried out using equation below：Qnm (kJ/s)=P*K, wherein K are the heat gain coefficient of milling of coal pulverizer, are chosen according to coal pulverizer type；(10) after the completion of the generation heat Qnm (kJ/s) that mills is calculated, total caloric receptivity Qxr of computing unit triggering extraction storage (kJ/s) carry out that radiation loss Qsr (kJ/s) is calculated, and stored；In the step, the calculating for radiation loss Qsr (kJ/s), computing unit is carried out using equation below：Qsr (kJ/s)=Qxr*0.02；(11) after radiation loss Qsr (kJ/s) calculating is completed, total caloric receptivity Qxr (kJ/ of computing unit triggering extraction storage S), mill and produce heat Qnm (kJ/s), default coal pulverizer inlet ventilation G (t/h) and pulverizer outlet temperature To (DEG C), with radiation loss Qsr (kJ/s) carry out that coal pulverizer inlet wind-warm syndrome Ti1 (DEG C) is calculated, and stored；(12) after coal pulverizer inlet wind-warm syndrome Ti1 (DEG C) calculating is completed, the coal pulverizer inlet of computing unit triggering extraction storage Temperature Ti (DEG C), carry out that coal pulverizer inlet wind-warm syndrome difference dTi is calculated with it, and stored；(13) after coal pulverizer inlet wind-warm syndrome difference dTi calculating is completed, computing unit enters the coal pulverizer for triggering extraction storage One's intention as revealed in what one says temperature approach dTi, it is judged compared with 1：If dTi ＜ 1, default coal pulverizer inlet leads in judgment step (3) Airflow value G (t/h) is the actual ventilation of now coal pulverizer inlet；If dTi >=1, default coal pulverizer in judgment step (3) Entrance divulge information value G (t/h) mistake, again preset coal pulverizer inlet ventilation value G (t/h), repeat step (3) to (13), directly To obtaining dTi ＜ 1；(14) after the actual ventilation for determining coal pulverizer inlet is calculated, value will be obtained and reach pulverized coal preparation system running optimizatin adjustment system System, carry out the adjustment operation of pulverized coal preparation system running optimizatin.
- A kind of 2. measuring method of coal pulverizer inlet ventilation according to claim 1, it is characterised in that the step (4) the raw coal evaporation moisture content mass flow Dw (kg/s) in is extracted pulverizer capacity Bm (t/h), the raw coal of storage by computing unit Intrinsic moisture content Wmf (%) value of moisture content Wy (%), coal dust, is calculated and is stored.
- A kind of 3. measuring method of coal pulverizer inlet ventilation according to claim 1, it is characterised in that the step (5) coal flow Dmfm (kg/s) is obtained as follows in the coal pulverizer outlet coal dust in：(51) pulverizer capacity Bm (t/h), raw coal moisture content Wy (%), the intrinsic moisture content of coal dust of computing unit triggering extraction storage Wmf (%) value, carry out that raw coal evaporation moisture content mass flow Dw (kg/s) is calculated, and stored；(52) after raw coal evaporation moisture content mass flow Dw (kg/s) is calculated, pulverizer capacity is extracted in computing unit triggering again Bm (t/h) value, carry out that coal pulverizer outlet pulverized coal mass flow Dmf is calculated with raw coal evaporation moisture content mass flow Dw (kg/s) (kg/s), and stored；(53) after coal pulverizer outlet pulverized coal mass flow Dmf (kg/s) is calculated, the coal of computing unit triggering extraction storage Intrinsic moisture content Wmf (%) value of powder, carry out that coal pulverizer outlet coal is calculated with coal pulverizer outlet pulverized coal mass flow Dmf (kg/s) Moisture content flow Dmfw (kg/s) in powder, and stored；(54) it is being calculated in coal pulverizer outlet coal dust after moisture content flow Dmfw (kg/s), computing unit triggering extraction storage Coal pulverizer outlet pulverized coal mass flow Dmf (kg/s), export moisture content flow Dmfw (kg/s) in coal dust with coal pulverizer and calculated Coal flow Dmfm (kg/s) in coal pulverizer outlet coal dust is obtained, and is stored.
- A kind of 4. measuring method of coal pulverizer inlet ventilation according to claim 1, it is characterised in that the step (6) moisture content flow Dmfw (kg/s) is obtained as follows in coal pulverizer outlet coal dust in：(61) pulverizer capacity Bm (t/h), raw coal moisture content Wy (%), the intrinsic moisture content of coal dust of computing unit triggering extraction storage Wmf (%) value, carry out that raw coal evaporation moisture content mass flow Dw (kg/s) is calculated, and stored；(62) after raw coal evaporation moisture content mass flow Dw (kg/s) is calculated, pulverizer capacity is extracted in computing unit triggering again Bm (t/h) value, carry out that coal pulverizer outlet pulverized coal mass flow Dmf is calculated with raw coal evaporation moisture content mass flow Dw (kg/s) (kg/s), and stored；(63) after coal pulverizer outlet pulverized coal mass flow Dmf (kg/s) is calculated, the coal of computing unit triggering extraction storage Intrinsic moisture content Wmf (%) value of powder, carry out that coal pulverizer outlet coal is calculated with coal pulverizer outlet pulverized coal mass flow Dmf (kg/s) Moisture content flow Dmfw (kg/s) in powder, and stored.
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| CN108237010B (en) * | 2017-05-16 | 2019-08-09 | 安徽工业大学 | A kind of coal pulverizer safe operation detection system and its detection method |
| CN112547294B (en) * | 2020-11-23 | 2022-07-19 | 西安热工研究院有限公司 | Method for acquiring inlet air volume of medium-speed coal mill under thermal state |
| CN114534901B (en) * | 2022-03-01 | 2022-11-11 | 华能上海石洞口发电有限责任公司 | Coal mill primary air control logic optimization method |
| CN114602607B (en) * | 2022-03-16 | 2023-09-22 | 中国大唐集团科学技术研究院有限公司中南电力试验研究院 | Positive pressure direct blowing coal mill inlet air quantity correction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4177951A (en) * | 1978-06-28 | 1979-12-11 | Combustion Engineering Inc. | Pulverizer air flow and temperature control |
| CN1480681A (en) * | 2003-07-29 | 2004-03-10 | 厦门厦大海通自控有限公司 | Optimizing control system for combustion process of circulating fluid bed in boiler |
| CN101334666A (en) * | 2008-07-15 | 2008-12-31 | 西安艾贝尔科技发展有限公司 | Double-inlet double-outlet steel ball coal mill straight blowing type milling system optimized control method |
| CN101358869A (en) * | 2008-03-17 | 2009-02-04 | 西安艾贝尔科技发展有限公司 | Material level measuring device for steel ball coal mill and optimization and control method of powder-making process by bin type steel ball coal mill |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0938512A (en) * | 1995-07-25 | 1997-02-10 | Ishikawajima Harima Heavy Ind Co Ltd | Method and device for primary air control in activating residual coal mill |
-
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4177951A (en) * | 1978-06-28 | 1979-12-11 | Combustion Engineering Inc. | Pulverizer air flow and temperature control |
| CN1480681A (en) * | 2003-07-29 | 2004-03-10 | 厦门厦大海通自控有限公司 | Optimizing control system for combustion process of circulating fluid bed in boiler |
| CN101358869A (en) * | 2008-03-17 | 2009-02-04 | 西安艾贝尔科技发展有限公司 | Material level measuring device for steel ball coal mill and optimization and control method of powder-making process by bin type steel ball coal mill |
| CN101334666A (en) * | 2008-07-15 | 2008-12-31 | 西安艾贝尔科技发展有限公司 | Double-inlet double-outlet steel ball coal mill straight blowing type milling system optimized control method |
Non-Patent Citations (1)
| Title |
|---|
| 中储式制粉系统的试验研究;何毅;《湖北电力》;20070428;第31卷(第2期);第51-53页 * |
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