CN105424105A - Dust removal system main pipe blast capacity detecting method and online detecting device - Google Patents
Dust removal system main pipe blast capacity detecting method and online detecting device Download PDFInfo
- Publication number
- CN105424105A CN105424105A CN201510745818.0A CN201510745818A CN105424105A CN 105424105 A CN105424105 A CN 105424105A CN 201510745818 A CN201510745818 A CN 201510745818A CN 105424105 A CN105424105 A CN 105424105A
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- dust pelletizing
- pelletizing system
- motor
- power
- dust removal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
Abstract
The invention provides a dust removal system main pipe blast capacity detecting method and a dust removal system main pipe blast capacity online detecting device and relates to the technical field of air flow detection. The dust removal system main pipe blast capacity detecting method comprises the steps of establishing the function relation between draught fan internal efficiency Eta and motor power Nd, obtaining data of air density Rho in a pipeline, draught fan transmission efficiency Etac and the pipeline diameter D, obtaining data of pipeline static pressure Hj and motor power Nd from the dust removal system working process, and calculating the corresponding dust removal system main pipe blast capacity. By the adoption of the detecting method, the calculated dust removal system main pipe blast capacity value is extremely approximate to the actual blast value of a dust removal system main pipe, and obtained through calculation completely, the problem that due to dust adhesion, detection precision is lowered is avoided, and high precision can be kept all the time.
Description
Technical field
The present invention relates to detection of gas flow rate technical field, particularly a kind of dust pelletizing system supervisor's air volume detecting method and on-line measuring device.
Background technology
Cigar mill wraparound dust removal system for workshop especially cigarette making and tipping machine concentrate in technique wind power dedusting system, main pipe pressure and air quantity are two monitor control indexs the most basic.Wherein, main pipe pressure ensures that the core index with processing quality normally produced by cigarette, and air quantity index is the key point ensureing wind-force stable supplying.Being embodied in the adjustment action of cigarette making and tipping machine technique wind power dedusting system, is exactly control supervisor by the detected value of supervisor's air quantity to mend valve area, interval to guarantee that the working point of high pressure centrifugal ventilator is in stable operating mode.When system loading is less, airflow value is prescribed a time limit lower than the lower of system stable operation Air Quantity Required, and blower fan surge will occur; When system loading is comparatively large, airflow value is greater than the upper of system stable operation Air Quantity Required and prescribes a time limit, and fan frequency converter overcurrent will occur.Once these two kinds of extreme cases occur, control system will regulate according to air volume test value and mend valve area, to ensure that fan operation is at rational operation interval.In Practical Project, air flow sensor is due to the impact by following factors, and measuring accuracy is difficult to meet the demands: through running for a long time, and sensor can adhere to a large amount of dust, thus causes accuracy of detection to reduce, and relatively large deviation appears in testing result.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of dust pelletizing system to be responsible for air volume detecting method, and the supervisor's air quantity result obtained by this detection method accurately, precision is higher and not by the impact of pipeline dust; As further improving, the present invention also provides a kind of dust pelletizing system based on above-mentioned detection method to be responsible for air quantity on-line measuring device.
In order to solve the problems of the technologies described above 1, the present invention adopts following technical scheme: a kind of dust pelletizing system supervisor air volume detecting method, comprises the following steps:
Step one, establishment fun for inner efficiency η and power of motor N
dbetween funtcional relationship:
First obtain dust pelletizing system and survey from each time point after starting to stable operation the duct static pressure H obtained
j, pipe in air quantity Q and power of motor N
d'sdata, recycling formula
calculate fan performance curve efficiency parameters, set up η thus
-n
dscatter diagram also carries out polynomial regression analysis to it and obtains fun for inner efficiency η and power of motor N
dfunctional relation;
Atmospheric density ρ, blower fan transmission efficiency η in step 2, acquisition pipeline
c,the data of pipe diameter D;
Step 3, startup dust pelletizing system, obtain the duct static pressure H detecting from dust pelletizing system and obtain
jand power of motor N
d'sdata;
Step 4, complete above-mentioned three steps after, the fun for inner efficiency η obtained in integrating step one and power of motor N
dfunctional relation and the parameters value that above-mentioned steps two, three is obtained substitute into following formula can calculate corresponding dust pelletizing system supervisor airflow value:
;
In above formula,
,
,
,
.
As another aspect of the present invention, the present invention also provides a kind of dust pelletizing system based on said method to be responsible for air quantity on-line measuring device, and it comprises:
Collecting unit, for gathering duct static pressure H during dust pelletizing system work
jand power of motor N
ddata;
Storage unit, at least stores following data: atmospheric density ρ, blower fan transmission efficiency η in pipeline
c,fun for inner efficiency η and power of motor N in the parameter value of pipe diameter D, the step one of claim 1
dfunctional relation and step 4 in calculate dust pelletizing system supervisor airflow value computing formula;
Computing unit, for calculating the real-time airflow value of dust pelletizing system supervisor, the duct static pressure H that described real-time airflow value gathers according to collecting unit
jand power of motor N
ddata, calculate according to the method for step 4 in claim 1;
Output unit, for exporting the real-time airflow value that computing unit is calculated.
The beneficial effect that the present invention obtains is: first dust pelletizing system supervisor air volume detecting method provided by the invention sets up fun for inner efficiency η and power of motor N
dfunctional relation, then according to surveying the duct static pressure H that arrives
jand power of motor N
dand atmospheric density ρ, blower fan transmission efficiency η in pipeline
c,the numerical evaluation of pipe diameter D goes out dust pelletizing system supervisor airflow value, the actual air volume value that the dust pelletizing system supervisor's airflow value adopting this detection method to calculate and dust pelletizing system are responsible for is very close, in above-mentioned detection method, be only setting up fun for inner efficiency η and power of motor N at first
dfunctional relation time need to use air flow sensor, just air flow sensor can be quit work or remove after completing the step setting up above-mentioned funtcional relationship, follow-up dust pelletizing system supervisor airflow value is completely by calculating, there is not the problem causing accuracy of detection to reduce because of dust adhesion, therefore higher precision can be kept by the dust pelletizing system supervisor air quantity that the method obtains always.
Accompanying drawing explanation
Fig. 1 is the implementing procedure figure of dust pelletizing system supervisor air volume detecting method in the present invention;
Fig. 2 is the composition structural representation of dust pelletizing system supervisor air quantity on-line measuring device in the present invention;
Fig. 3 is η-N
dscatter diagram;
Fig. 4 is FC01 measured value and calculated value comparison diagram;
Fig. 5 is FC02 measured value and calculated value comparison diagram;
Fig. 6 is FC03 measured value and calculated value comparison diagram;
In Fig. 4-6, α is measured value, α
xfor calculated value.
Embodiment
For the ease of the understanding of those skilled in the art, below in conjunction with embodiment and accompanying drawing, the present invention is further illustrated, and the content that embodiment is mentioned not is limitation of the invention.
A distinguishing feature of the present invention is, calculates dust pelletizing system supervisor airflow value by the functional relation set up between power of motor and air quantity, thus avoids air flow sensor to be subject to the restriction of mounting condition or the impact of dust attachment.
Particularly, as shown in Figure 1, implementing procedure of the present invention comprises the following steps:
Step one, establishment fun for inner efficiency η and power of motor N
dbetween funtcional relationship:
First obtain dust pelletizing system and survey from each time point after starting to stable operation the duct static pressure H obtained
j, pipe in air quantity Q and power of motor N
d'sdata, recycling formula
calculate fan performance curve efficiency parameters, set up η thus
-n
dscatter diagram also carries out polynomial regression analysis to it and obtains fun for inner efficiency η and power of motor N
dfunctional relation;
Atmospheric density ρ, blower fan transmission efficiency η in step 2, acquisition pipeline
c,the data of pipe diameter D;
Step 3, startup dust pelletizing system, obtain the duct static pressure H detecting from dust pelletizing system and obtain
jand power of motor N
d'sdata;
Step 4, complete above-mentioned three steps after, the fun for inner efficiency η obtained in integrating step one and power of motor N
dfunctional relation and the parameters value that above-mentioned steps two, three is obtained substitute into following formula can calculate corresponding dust pelletizing system supervisor airflow value:
;
In above formula,
,
,
,
.
Be that example is verified accuracy of detection of the present invention below by Ganzhou cigar mill technique wind power dedusting system FC01, FC02 and FC03.
First by statistical conversion function, dust pelletizing system is obtained from the duct static pressure H starting to stable operation
j, pipe in air quantity Q and power of motor N
d'sdata sample, before the computation, also following basic parameter to be determined:
Caliber D: the diameter getting fan inlet pipeline, this example is Φ 530, i.e. 0.53m; ;
Transmission efficiency η
c: according to kind of drive determination transmission efficiency value, this example adopts shaft coupling transmission, gets 0.98;
Atmospheric density ρ: according to local sea level elevation and dedusting room temperature computation, this example gets ρ=1.2.
Secondly, need engineering unit to convert, such as by power unit from kilowatt to become watt, air measuring unit m
3/ h, should turn to m
3/ s, so that calculate.
Then formula is utilized
calculate fan performance curve efficiency parameters, η-N as shown in Figure 3 can be set up thus
d(in figure 3, transverse axis represents power of motor N to scatter diagram
d, unit W, the longitudinal axis represents fun for inner efficiency η), polynomial regression analysis is carried out to it and can obtain fun for inner efficiency η and power of motor N
dfunctional relation:
y=1.63068E-28x
6-3.0933E-23x
5+1.91426E-18x
4-3.27045E-14x
3-7.90689E-10x
2+3.41771E-05x+0.205984651
Coefficient R 2=0.953705777.Here x is power of motor, and y is fun for inner efficiency.
By fun for inner efficiency η and power of motor N
dfunctional relation can calculate the fun for inner efficiency value of difference according to the power of motor value of frequency converter display, internal efficiency efficiency value is applied to following formula:
,
It should be noted that, in above formula,
,
,
,
, just can try to achieve dust pelletizing system supervisor Wind Coverage Calculation value more accurately thus.
Below by the calculated value obtained by said method with detect by air flow sensor the measured value obtained and contrast, FC01, FC02, FC03 measured value and calculated value comparison diagram are shown in Fig. 4, Fig. 5, Fig. 6 respectively, through contrast calculate the Wind Coverage Calculation value relative average debiation of FC01 be 1.9%, FC02, FC03 Wind Coverage Calculation value relative average debiation is respectively 2.7% and 2.6%.In figs. 4-6, horizontal axis representing time, unit S, the longitudinal axis represents air quantity, unit m
3/ S.
Can be determined by above-mentioned experiment, the actual air volume value that dust pelletizing system that detection method provided by the invention obtains supervisor's airflow value and dust pelletizing system are responsible for is very close, in above-mentioned detection method, is only setting up fun for inner efficiency η and power of motor N at first
dfunctional relation time need to use air flow sensor, just air flow sensor can be quit work or remove after completing the step setting up above-mentioned funtcional relationship, follow-up dust pelletizing system supervisor airflow value is completely by calculating, there is not the problem causing accuracy of detection low because of dust adhesion, therefore higher precision can be kept by the dust pelletizing system supervisor air quantity that the method obtains always.
Based on above-mentioned detection method, the present invention also provides a kind of dust pelletizing system to be responsible for air quantity on-line measuring device further, and as shown in Figure 2, this dust pelletizing system supervisor air quantity on-line measuring device comprises:
Collecting unit, for gathering duct static pressure H during dust pelletizing system work
jand power of motor N
ddata; Particularly, duct static pressure H during above-mentioned dust pelletizing system work
jdata can be collected by the pressure transducer be arranged on dust pelletizing system supervisor, power of motor N
dthe data that can directly adopt fan frequency converter to detect.
Storage unit, at least stores following data: atmospheric density ρ, blower fan transmission efficiency η in pipeline
c,fun for inner efficiency η and power of motor N in the parameter value of pipe diameter D, the step one of claim 1
dfunctional relation and step 4 in calculate dust pelletizing system supervisor airflow value computing formula;
Computing unit, for calculating the real-time airflow value of dust pelletizing system supervisor, the duct static pressure H that described real-time airflow value gathers according to collecting unit
jand power of motor N
ddata, calculate according to the method for step 4 in claim 1;
Output unit, for exporting the real-time airflow value that computing unit is calculated.
Above-mentioned dust pelletizing system supervisor air quantity on-line measuring device is owing to eliminating air flow sensor of the prior art, dust pelletizing system supervisor airflow value is obtained by computing unit computing completely, therefore do not exist and cause accuracy of detection by low problem because of dust adhesion air flow sensor, therefore this dust pelletizing system supervisor air quantity on-line measuring device can keep higher precision always.
Above-described embodiment is the present invention's preferably implementation, and in addition, the present invention can also realize by alternate manner, and under the prerequisite not departing from the technical program design, any apparent replacement is all within protection scope of the present invention.
The improvements of the present invention relative to prior art are understood more easily in order to allow those of ordinary skill in the art, accompanying drawings more of the present invention and description are simplified, and for the sake of clarity, present specification is omitted some other elements, and those of ordinary skill in the art it is to be appreciated that these abridged elements also can form content of the present invention.
Claims (2)
1. dust pelletizing system supervisor air volume detecting method, comprises the following steps:
Step one, establishment fun for inner efficiency η and power of motor N
dbetween funtcional relationship:
First obtain dust pelletizing system and survey from each time point after starting to stable operation the duct static pressure H obtained
j, pipe in air quantity Q and power of motor N
d'sdata, recycling formula
calculate fan performance curve efficiency parameters, set up η thus
-n
dscatter diagram also carries out polynomial regression analysis to it and obtains fun for inner efficiency η and power of motor N
dfunctional relation;
Atmospheric density ρ, blower fan transmission efficiency η in step 2, acquisition pipeline
c,the data of pipe diameter D;
Step 3, startup dust pelletizing system, obtain the duct static pressure H detecting from dust pelletizing system and obtain
jand power of motor N
d'sdata;
Step 4, complete above-mentioned three steps after, the fun for inner efficiency η obtained in integrating step one and power of motor N
dfunctional relation and the parameters value that above-mentioned steps two, three is obtained substitute into following formula can calculate corresponding dust pelletizing system supervisor airflow value:
;
In above formula,
,
,
,
.
2. a dust pelletizing system supervisor air quantity on-line measuring device, detect dust pelletizing system supervisor air quantity based on detection method according to claim 1, it comprises:
Collecting unit, for gathering duct static pressure H during dust pelletizing system work
jand power of motor N
ddata;
Storage unit, at least stores following data: atmospheric density ρ, blower fan transmission efficiency η in pipeline
c,fun for inner efficiency η and power of motor N in the parameter value of pipe diameter D, the step one of claim 1
dfunctional relation and step 4 in calculate dust pelletizing system supervisor airflow value computing formula;
Computing unit, for calculating the real-time airflow value of dust pelletizing system supervisor, the duct static pressure H that described real-time airflow value gathers according to collecting unit
jand power of motor N
ddata, calculate according to the method for step 4 in claim 1;
Output unit, for exporting the real-time airflow value that computing unit is calculated.
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|---|---|---|---|
| CN201510745818.0A CN105424105B (en) | 2015-11-06 | 2015-11-06 | Dust pelletizing system is responsible for air volume detecting method and on-line measuring device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153128A (en) * | 2016-03-24 | 2016-11-23 | 李建锋 | Compressor flow based on gas temperature rise and efficiency measurement instrument |
| CN108249164A (en) * | 2016-12-29 | 2018-07-06 | 贵州中烟工业有限责任公司 | A kind of application method of vacuum control system |
| CN108263862A (en) * | 2016-12-30 | 2018-07-10 | 贵州中烟工业有限责任公司 | A kind of stem blast system and its vacuum control system |
| CN108661930A (en) * | 2018-05-14 | 2018-10-16 | 广东环葆嘉节能科技有限公司 | A kind of air quantity visual control method and device |
| CN109296558A (en) * | 2018-11-09 | 2019-02-01 | 天津瑞能电气有限公司 | A kind of method for fast measuring of blower actual motion air quantity |
| CN111617561A (en) * | 2019-02-28 | 2020-09-04 | 宁波方太厨具有限公司 | Filtering device replacement, cleaning and detection method based on equipment parameter detection |
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| CN103604470A (en) * | 2013-12-10 | 2014-02-26 | 国家电网公司 | Method for measuring fan flow in real time according to DCS (distributed control system) data |
| CN103836692A (en) * | 2014-02-28 | 2014-06-04 | 广东威灵电机制造有限公司 | Range hood, and method and system for monitoring air volume of range hood |
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| GB2313197A (en) * | 1996-05-08 | 1997-11-19 | Advanced Energy Monitor Syst | Measuring pump flow rate |
| CN103604470A (en) * | 2013-12-10 | 2014-02-26 | 国家电网公司 | Method for measuring fan flow in real time according to DCS (distributed control system) data |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153128A (en) * | 2016-03-24 | 2016-11-23 | 李建锋 | Compressor flow based on gas temperature rise and efficiency measurement instrument |
| CN108249164A (en) * | 2016-12-29 | 2018-07-06 | 贵州中烟工业有限责任公司 | A kind of application method of vacuum control system |
| CN108263862A (en) * | 2016-12-30 | 2018-07-10 | 贵州中烟工业有限责任公司 | A kind of stem blast system and its vacuum control system |
| CN108661930A (en) * | 2018-05-14 | 2018-10-16 | 广东环葆嘉节能科技有限公司 | A kind of air quantity visual control method and device |
| CN109296558A (en) * | 2018-11-09 | 2019-02-01 | 天津瑞能电气有限公司 | A kind of method for fast measuring of blower actual motion air quantity |
| CN111617561A (en) * | 2019-02-28 | 2020-09-04 | 宁波方太厨具有限公司 | Filtering device replacement, cleaning and detection method based on equipment parameter detection |
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|---|---|
| CN105424105B (en) | 2018-07-31 |
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