CN105806643B - A kind of recognition methods of deduster gas-liquid mixture phase and device - Google Patents
A kind of recognition methods of deduster gas-liquid mixture phase and device Download PDFInfo
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- CN105806643B CN105806643B CN201610350389.1A CN201610350389A CN105806643B CN 105806643 B CN105806643 B CN 105806643B CN 201610350389 A CN201610350389 A CN 201610350389A CN 105806643 B CN105806643 B CN 105806643B
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The present invention relates to a kind of recognition methods of deduster gas-liquid mixture phase and devices, deduster inside gas-liquid coupled mode is effectively identified, and the judgement gas-liquid coupling effect that can be quantified, deduster is reduced to run with non-regime mode, its whole dust removing effects is improved indirectly, the case where ensureing that deduster can be run under energy-efficient pattern, causing particulate matter largely to be escaped because of deduster operational effect to reduce, improves the combined dust-eliminating efficiency of deduster.
Description
Technical field
The present invention relates in a kind of self-induced scrubber course of work, the method for monitoring its gas-liquid mixture phase has
Body is recognition methods and the device of a kind of deduster gas-liquid mixture phase.
Background technology
Self-induced scrubber is simple in structure, easy to maintain, cost is relatively low, is the maximum discharges row such as mining industry, metallurgy and coal chemical industry
The common environmental protection equipment of industry fine particle emission reduction, and have been widely used.However found in practical application, auto-excitation type is removed
Dirt device is often in closed environment, and gas-liquid mixture phase can not be observed in operational process, and gas-liquid mixture phase is run with deduster
State and efficiency of dust collection have very big relationship, when operating parameter (such as wind speed, liquid level, structure) changes, deduster gas-liquid
Admixture will change, and directly affect dust removing effects.
When laboratory is tested, researcher also tends to only check gas-liquid mixed shape by transparent windows naked eyes
State has certain subjectivity, and there are no a kind of effective ways of quantitative judge gas-liquid mixed, to the gas-liquid mixed shape of deduster
State is detected and identifies.
In addition, the instrument price of existing on-line monitoring deduster efficiency of dust collection is expensive, basic principle is monitoring dust concentration,
It is easily damaged monitoring device when dust concentration is especially big, is unable to reach monitoring effect.And a kind of currently not yet it can pass through prison
Survey the method that gas-liquid mixture phase carrys out indirect monitoring deduster operating status, and then indirectly lasting monitoring deduster operation effect
Fruit.
Invention content
The purpose of the present invention is a kind of inspections of the monitoring deduster gas-liquid mixture phase proposed for deduster operating status
Survey method, it can be by monitoring the pressure parameter in deduster operational process, and by correlation analysis, identifies deduster
Gas-liquid mixed pattern, and then differentiate the operating status of deduster, indirect monitoring deduster operational effect.It eliminates because in deduster
Portion's closing can not be observed, and can not the timely and effective defect for judging deduster operational effect；It is quantitative to establish deduster R＆D process
Judge the effective ways of gas-liquid mixed effect.
The technical solution adopted by the present invention to solve the technical problems is：A kind of identification side of deduster gas-liquid mixture phase
Method is analyzed gas liquid two-phase flow information entrained in Pressure Fluctuation Signal and is come by acquiring the pressure signal of house outlet
Gas-liquid two-phase admixture is detected, the specific steps are：
Step 1) makes gas-liquid mixture phase and identifies sample：
Gas-liquid couple state is divided into faint fluctuation model, hydrostatic potential difference pattern, resonance water attack pattern, shearing by step 1.1)
Liquid curtain pattern and volume air-breathing steep pattern；
Step 1.2) acquires the pressure at wind speed, liquid level and house outlet under above-mentioned five kinds of patterns in deduster respectively
Fluctuation information, while the corresponding level parameter of different mode is measured, the pressure oscillation information under different wind speed, liquid level is carried out
Statistical analysis, spectrum analysis obtain dust remover resistance changing rule, sort out the drag characteristics value of corresponding modes, and obtain pressure
The power spectral density PSD changes in distribution situation of fluctuation information show that self-induced scrubber gaseous pressure vibration frequency mainly collects
Middle range, and frequency range is divided into n frequency range；
Step 1.3) extracts the feature vector that can distinguish different mode respectively, including work(from power spectral density plot
Frequency range in rate spectrum density figure under the peak ranges of each frequency range, relative peak range and different mode corresponding to peak value, knot
Drag characteristic and level parameter are closed, the range of each feature vector value is then sorted out, and calculated, determines feature under each pattern
The correspondence section of vector；Wherein, the specific level under liquid level difference pattern ranging from [y1, y2]；Low frequency frequency under the water attack pattern that resonates
Frequency range corresponding to section peak value is [n1, n2], and the frequency range corresponding to intermediate-frequency band peak value is [n3, n4]；Shear liquid
Frequency range under curtain pattern corresponding to intermediate-frequency band peak value is [q5, q6], is occurred when small shearing corresponding to low frequency band peak value
Frequency range be [q1, q2], the frequency range corresponding to intermediate-frequency band peak value is [q3, q4]；
Step 2) acquires wind speed, liquid level and the pressure oscillation information under operating status in deduster and is analyzed, and obtains
It takes and the feature vector corresponding to the feature vector in step 1.3；
Step 2.1) is acquired pressure oscillation original signal by monitoring system, obtains its power spectral density plot, together
When obtain wind speed and liquid level information；
Step 2.2) analyzes original signal and power spectral density plot, extraction the higher correlated characteristic of discrimination to
Amount, i.e., the peak ranges and relative peak range of each frequency range：
Step 2.2.1) power spectral density plot is divided into n frequency range, it extracts respectively under each pattern in power spectral density plot
Then peak-peak in first frequency range to the n-th frequency range sorts out each frequency range peak ranges under each pattern；
Step 2.2.2) percentage of second frequency range to the n-th frequency range relative to the first frequency range under all patterns is calculated, and
Sort out the relative peak range under each pattern：
The gas-liquid coupled mode in the deduster under operating status is identified in step 3)：
The individual features vector model that two feature vector ranges of the step 3.1) based on step 2.2 are extracted with step 1.3
Enclose and make comparisons, due to faint fluctuation model high band peak value maximum value compared with other pattern high band peak values minimum value also
Low, the minimum value of volume air-breathing bubble pattern high band peak value is obviously higher by compared with the maximum value of other pattern high band peak values, therefore energy
Faint fluctuation model and volume air-breathing bubble pattern are identified well；
Step 3.2) then, by reset pressure fluctuates signal, dust remover resistance size is calculated out, according to dust remover resistance
Characteristic, detects whether its Resistance Value is more than regulation Resistance Value A, if drag characteristic is more than regulation Resistance Value A, meanwhile, pass through liquid
Level sensor detects the liquid level of dedusting chamber whether in specific level range [y1, y2] under hydrostatic potential difference pattern, if so, removing
Dirt device internal flow form is hydrostatic potential difference pattern；If it is not, being then shearing liquid curtain pattern or resonance water attack pattern；
Step 3.3) detects the frequency corresponding to low frequency band peak value whether in [n1, n2] range, while detecting intermediate frequency
Whether the frequency corresponding to peak value in frequency range is resonance water attack if meeting the two conditions simultaneously in [n3, n4] range
Otherwise pattern detects the frequency corresponding to the peak value in intermediate-frequency band whether in [q5, q6] range, if to shear liquid
Curtain pattern；Alternatively, the frequency corresponding to detection low frequency band peak value while detecting intermediate-frequency band whether in [q1, q2] range
Whether the frequency corresponding to interior peak value is also shearing liquid curtain mould if meeting the two conditions simultaneously in [q3, q4] range
Formula, if not satisfied, being then other patterns.
The deduster gaseous pressure vibration frequency mainly concentrates ranging from 0-30Hz, and frequency range is divided into low 0-
Tri- 10Hz, middle 10-20Hz, high 20-32Hz frequency ranges.
The peak ranges of faint fluctuation model high band are 0-20020, and the peak ranges of volume air-breathing bubble pattern high band are
1.51851E+6,2.53083E+7。
The regulation Resistance Value A is 300Pa.
A kind of identification device of deduster gas-liquid mixture phase, including pressure-inducting device, liquid level sensor, anemobiagraph, liquid level
Transmission and stabilizing adjusting device, data collecting card and computer；The deduster includes inlet channel, sink, dedusting chamber, current limliting
Plate, dewatering plate and dedusting fan, the inlet channel are set to sink side, dedusting chamber, current limiting plate, dewatering plate and dedusting fan
It is sequentially set to above sink, choke block is arranged in one end that inlet channel is connect with sink, forms restriction；The anemobiagraph installation
In inlet channel；The liquid level transmits and stabilizing adjusting device is mounted on the lower section of restriction；Liquid level transmits and stable regulation
Device is rectangle baffle, is installed with groove body plane perpendicular, and is formed between the side wall of groove body installation inlet channel side
Level gauging room, the top of baffle extends to groove body side wall arc closes level gauging ceiling mouth, and baffle lower part is along its length
The liquid-passing hole of connection level gauging room and groove body is set, and liquid level sensor is set to above space interior；The pressure-inducting device installation
In the lower section of dedusting fan；The main body of the pressure-inducting device is a L-shaped pipeline, lateral tube body and setting inside deduster
Pressure point is threadedly coupled, and longitudinal pipe body is located at outside deduster to be threadedly coupled with pressure sensor, along corner inside pipeline
The catch basin of outer rim tube wall setting recess, catch basin are connected with downward drainpipe, and the outer end of L-shaped pipeline is to hold under working condition
Lid sealing.
The internal diameter of the pipeline 6-10mm.
The pressure guiding pipe total length control is within 12cm, wherein vertical direction 3-5cm.
The pressure point is arranged below the air port of dedusting fan.
The liquid level transmits and stabilizing adjusting device selects resistant material to be made.
The groove body side wall wall surface 10-20cm that the liquid level transmits and stabilizing adjusting device distance is closer with it.
The 1/15-1/20 that the liquid level transmits and the liquid-passing hole aperture of stabilizing adjusting device is barrier width, is dislocatedly distributed
Setting.
The liquid level sensor range:0~0.6m, signal output:0~5V DC, the response time≤5ms, repeatable accuracy ±
1.0mm, environment temperature -30~+85 DEG C.
The beneficial effects of the invention are as follows：When deduster is run, due to being closed inside deduster, and can not timely and effectively it sentence
Gas-liquid couple state inside other deduster, to judge its dust removing effects, monitoring system of the invention and monitoring method, energy
It is enough to eliminate this defect well, deduster inside gas-liquid coupled mode is effectively identified, and what can be quantified sentences
It dies liquid coupling effect, reduces deduster and run with non-regime mode, improve its whole dust removing effects, guarantee deduster indirectly
It can be run under energy-efficient pattern, to reduce because the case where deduster operational effect causes particulate matter largely to be escaped is sent out
It is raw, improve the combined dust-eliminating efficiency of deduster.
Description of the drawings
Attached drawing 1 is a kind of structural schematic diagram of the identification device of deduster gas-liquid mixture phase.
Attached drawing 2 is the structural schematic diagram of pressure-inducting device.
Attached drawing 3 is the structural schematic diagram of liquid level transmission and stabilizing adjusting device.
Attached drawing 4 is a kind of intelligent monitor system program chart of the identification device of deduster gas-liquid mixture phase.
Attached drawing 5 is the spectrogram under different liquid levels and wind speed.
In figure, 1. dedusters, 2. sinks, 3. inlet channels, 4. choke blocks, 5. dedusting chambers, 6. current limiting plates, 7. dewatering plates,
8. dedusting fan, 9. liquid levels transmit and stabilizing adjusting device, 10. pressure points, 11. pressure-inducting devices, 11-1. internal threads, outside 11-2.
Screw thread, 11-3. catch basins, 11-4. drainpipes, 12. anemobiagraphs, 13. liquid level sensors, 14. pressure sensors, 15. data are adopted
Truck, 16. computers, 17. liquid levels.
Specific implementation mode：
In conjunction with Fig. 4 and Fig. 5, a kind of identification of 1 gas-liquid mixture phase of deduster, the first step：Various wind speed and liquid level are transported
The Pressure Fluctuation Signal that deduster 1 exports under row state is acquired, and is then carried out power spectral-density analysis, is shown that auto-excitation type is removed
1 gaseous pressure vibration frequency of dirt device is concentrated mainly within the scope of 0-30Hz, choose the pressure signals of different liquid level difference wind speed into
Line frequency spectrum analysis obtains power spectral density PSD changes in distribution situation, and 1 gas phase PSD figures of deduster are different with gas-liquid couple state, tool
There is obvious characteristic；
Work as b0<0mm, when wind speed is smaller, PSD figures have apparent dominant frequency, and other frequency range PSD values near frequency 2Hz
Very faint, as shown in Fig. 5 (A1), (B1) and (C1), can be seen that the state in conjunction with gas-liquid two-phase couple state is gas-liquid coupling
The faint fluctuation model closed, at this point, liquid and gas are all fluctuated with the fixed frequency of 2Hz or so.
Increasing with air velocity, gas-liquid is coupled into resonance water attack pattern, and PSD figures show as apparent " adherent effect ",
Gaseous pressure fluctuation dominant frequency concentrates on lower frequency, such as Fig. 5 (A3), (B2) and (C2), this is because resonate water attack when, liquid level 17
Whole Pitching by a relatively large margin occurs, frequency is smaller, and the fluctuation of other frequency ranges there is no apparent wave crest；Low frequency
The peak value of wave crest is apparently higher than the peak value of the non-resonant behavior of neighbouring flow velocity, this explanation, the energy for water attack of resonating focuses primarily upon
The liquid level 17 of low frequency is maintained to fluctuate.
It is further increased with wind speed, resonance water attack is gradually transitioned into shearing liquid curtain pattern, and gaseous pressure PSD figures are in high band
There is apparent wave crest, such as Fig. 5 (A4), (B4) and (C4), all occurs obviously in the PSD figures of frequency 18Hz or so, three liquid levels
Wave crest, and increase the wave crest frequency of occurrences with liquid level and have increase tendency；This phenomenon mainly shears liquid curtain mould due to entering
After formula, air-flow forms continuous shear action to liquid level 17, generates a large amount of drops or liquid curtain, and the pressure oscillation of gas phase is directly reacted
This change procedure of liquid phase.And between resonance water attack and shear the region between liquid curtain pattern, then within the scope of 0-20Hz
There are multiple unconspicuous wave crests of regularity, the PSD Distribution values in the frequency range are also more average, multiple such as Fig. 5 (B3) and (C3)
The appearance of wave crest, there is also 17 fluctuation of a certain amount of liquid level, causes to save in wave process mainly due to resonance water attack changeover portion
The a large amount of drops of head piece, liquid curtain excite the influence to gaseous pressure, whole being evenly distributed then to increase mainly due to air velocity, carry
High gas-liquid mixed effect makes vibration frequency all exist in a wide range of.
With liquid level increase (b0 >=0mm), the general morphologictrend of gaseous pressure PSD figures with it is close compared with low liquid level phase, thin
Difference in section trend.When deduster 1 is in hydrostatic potential difference pattern, PSD figures have one in lower frequency (0-8Hz) range
A more apparent wave crest, when this wave crest is in throttling liquid level difference, air-flow is in the form of being bubbled by caused by deduster 1
Pressure oscillation change, such as Fig. 5 (D1), (E1) and (F1), fluctuations of the Fig. 5 (D1) in the frequency range is more in disorder, mainly due to
B0=0mm, when air velocity is relatively low, air-flow has two kinds of forms of bubbling and shearing to liquid level 17, and the variation of stream pressure is made to have
There are multiple wave crests.
And further increased with air velocity, gas-liquid is coupled into volume air-breathing bubble pattern, exists and shears liquid curtain with low liquid level
The PSD of pattern schemes similar waveform, and a complementary wave peak is formed about in 20Hz；But the PSD values in 0-10Hz frequency ranges all compared with
Height, distribution is more average, such as Fig. 5 (D4), (E4) and (F4).This is because entering volume air-breathing steeps pattern, gas-liquid mixed is filled very much
Point, air-flow carries big quantity of fluid and enters dedusting chamber 5, while big quantity of fluid has wrapped up a large amount of drops and entered liquid internal again, mixes
Complexity make pressure oscillation frequency range be distributed it is more, there is being relatively evenly distributed within the scope of 0-10Hz.
It was accordingly found that each pattern has its unique feature vector, can be distinguished under different mode respectively to extract
The value of feature vector (such as power spectrum peak, frequency) then sort out the range of each feature vector value, and carry out
It is corresponding to calculate, determine the correspondence section of feature vector under each pattern.
Analysis and research find, the peak ranges, relative peak peak ranges of each frequency range and do not sympathize in power spectral density plot
Frequency range under condition corresponding to peak value, and combine the dust remover resistance characteristic of early-stage study and the level parameter of specific location
Deduster internal flow pattern can be identified well.
Power spectral density plot is identified in second step, judges gas-liquid mixture phase：Spy in power spectral density plot
Sign waveform can show the characteristic feature of 1 gas-liquid mixture phase of deduster, pass through the knowledge of the characteristic feature to power spectral density plot
Do not achieve the purpose that identify gas-liquid mixture phase, implementation process is as follows:
First, pressure oscillation original signal is acquired by monitoring system, and obtains its power spectral density plot；
Secondly, original signal and power spectral density plot are analyzed, the higher correlated characteristic vector of extraction discrimination：
First, extract under each pattern the first frequency range (such as 0-5HZ frequency bands) peak-peak in power spectral density plot, the second frequency
Section (such as 5-10HZ frequency bands) peak-peak, and so on, to the peak-peak in the n-th frequency range, then, sort out under each pattern
Each frequency range peak ranges, such as the following table 1：
Table 1
Second, calculate the second frequency range under the whole circumstances, the n-th frequency range of third frequency range ... relative to the first frequency range value (i.e.
Second frequency range, the n-th frequency range of third frequency range ... account for the percentage of the first frequency range), and the relative peak range under each pattern is sorted out,
Such as the following table 2：
Table 2
The study found that it is based on two above feature vector range, faint fluctuation model, volume air-breathing bubble pattern and other three kinds
Pattern has higher discrimination, can well identify it respectively.Then, by original signal, its drag size is measured,
According to 1 drag characteristic of deduster, detect whether its Resistance Value is more than specified value, in conjunction with the liquid of 5 offside of dedusting chamber at restriction
Position is detected whether in the specific level range [y1, y2] under hydrostatic potential difference pattern by liquid level sensor 13, if so, removing
1 internal flow form of dirt device is hydrostatic potential difference pattern；If it is not, being then shearing liquid curtain pattern or resonance water attack pattern.Then,
The frequency corresponding to low frequency band peak value is detected whether in [n1, n2] range (resonance low frequency frequency fluctuation range when generation),
Detect simultaneously frequency corresponding to peak value in intermediate-frequency band whether (intermediate frequency fluctuation when resonating in [n3, n4] range
Range), it is otherwise detected corresponding to the peak value in intermediate-frequency band for resonance water attack pattern if meeting the two conditions simultaneously
Whether frequency is in [q5, q6] range (intermediate frequency fluctuation range when shearing), if to shear liquid curtain pattern；Alternatively,
Detect low frequency band peak value corresponding to frequency whether in [q1, q2] range (when small shearing occurs Frequency fluctuate model
Enclose), while the frequency corresponding to the peak value in intermediate-frequency band is detected whether in [q3, q4] range (in when small shearing occurs
Frequency fluctuation range), also it is shearing liquid curtain pattern if meeting the two conditions simultaneously, if not satisfied, being other patterns.
A kind of identification device of 1 gas-liquid mixture phase of deduster, including impulse dress are can be seen that in conjunction with Fig. 1, Fig. 2, Fig. 3
Set 11, liquid level sensor 13, anemobiagraph 12, liquid level transmission and stabilizing adjusting device 9, pressure sensor 14, data collecting card 15
With computer 16；The deduster 1 includes inlet channel 3, sink 2, dedusting chamber 5, current limiting plate 6, dewatering plate 7 and dedusting fan 8,
The inlet channel 3 is set to 2 side of sink, and dedusting chamber 5, current limiting plate 6, dewatering plate 7 and dedusting fan 8 are sequentially set to sink 2
Choke block 4 is arranged in top, one end that inlet channel 3 is connect with sink 2, forms restriction；The anemobiagraph 12 is mounted on air inlet
In channel 3；The liquid level transmits and stabilizing adjusting device 9 is mounted on the lower section of restriction；Liquid level transmits and stabilizing adjusting device 9
It for rectangle baffle, is installed with groove body plane perpendicular, and liquid level is formed between the side wall of 3 side of groove body installation inlet channel
Measuring chamber, the top of baffle extends to groove body side wall arc closes level gauging ceiling mouth, and baffle lower part is arranged along its length
It is connected to the liquid-passing hole of level gauging room and groove body, liquid level sensor 13 is set to above space interior；The pressure-inducting device 11 is installed
In the lower section of dedusting fan 8；The main body of the pressure-inducting device 11 is a L-shaped pipeline, and the end of lateral tube body is equipped with outer spiral shell
Line 11-2 is threadedly coupled with the pressure point 10 that 1 inside of deduster is arranged, and longitudinal pipe body is located at outside deduster 1, and end is equipped with
Internal thread 11-1 is threadedly coupled with pressure sensor 14, along the catch basin of the outer rim tube wall of corner setting recess inside pipeline
11-3, catch basin 11-3 are connected with downward drainpipe 11-4, and the outer end of L-shaped pipeline is with end cap seal under working condition；It is described
Anemobiagraph 12, liquid level sensor 13 and pressure sensor 14 are connect with data collecting card 15, and the connection of data collecting card 15 calculates
Machine 16 constitutes deduster 1 and monitors system.
The pressure guiding pipe internal diameter of the pipeline 6-10mm.
The pressure guiding pipe total length control is within 12cm, wherein vertical direction 3-5cm.
The pressure point 10 is arranged below the air port of dedusting fan 8.
The setting of the end cap can prevent the liquid phase in deduster 1 from entering in pressure sensor 14, to collected pressure
Difference signal has an impact, and causes unnecessary error.
The liquid level transmits and stabilizing adjusting device 9 selects resistant material to be made.
The groove body side wall wall surface 10-20cm that the liquid level transmits and 9 distance of stabilizing adjusting device is closer with it.
The 1/15-1/20 that the liquid level transmits and the liquid-passing hole aperture of stabilizing adjusting device 9 is barrier width, is dislocatedly distributed
Setting.Liquid phase (liquid phase i.e. between this device and left side constraint wall surface) fluctuates acutely not with dedusting chamber 5 on the left of this device
The liquid phase connection for easily directly measuring its position is not easy to measure its position by the fluctuation in dedusting chamber 5 is larger using law of connected vessels
Liquid level 17 be transmitted to this device left side relatively stable liquid level 17, reduce gas phase and fluctuate influence to liquid level 17, stablize
17 position of liquid level, convenient for measuring.
The liquid level sensor 13 selects the sensor that market generally uses, range:0~0.6m, signal output:0~5V
DC, response time≤5ms, repeatable accuracy ± 1.0mm, environment temperature -30~+85 DEG C.
Data collecting card 15 selects market routine high-speed collection card, sample frequency to be not less than 1kHz, and sampling number is not less than
5120。
Computer 16 selects market conventional computer, system requirements to be not less than windows Xp, memory 2GB.
Embodiment
For the identification device of this 1 gas-liquid mixture phase of specific deduster of this laboratory research, implement
Method is as follows：
First, the power spectrum under each regime mode is analyzed (as described in the first step above)
Secondly, it is based on power spectral density map analysis, extracts the feature vector under each pattern,
First, the frequency domain that energy is mainly concentrated is divided into three frequency bands (value of i.e. above-mentioned n is 3), then, respectively
Extract under each pattern the first frequency range (0-10HZ frequency bands) peak-peak, the second frequency range (10-20HZ frequencies in power spectral density plot
Section) peak-peak, then third frequency range (20-32HZ frequency ranges) peak-peak sorts out each frequency range peak value model under each pattern
It encloses, such as the following table 3：
Table 3
Second, calculate the second frequency range under the whole circumstances, third frequency range relative to the first frequency range value (i.e. the second frequency range,
Third frequency range accounts for the percentage of the first frequency range), and sort out the relative peak range under each pattern, such as the following table 4：
Table 4
The study found that it is based on two above feature vector range, faint fluctuation model, volume air-breathing bubble pattern and other three kinds
Pattern has higher discrimination, can well identify it respectively.Then, by original signal, its drag size is measured,
According to 1 drag characteristic of deduster, detect whether its Resistance Value is more than a certain specific specified value, in conjunction with dedusting chamber at restriction
The liquid level of 5 offsides detects whether the specific level range [16.5,18] under hydrostatic potential difference pattern by liquid level sensor 13
In (value of i.e. above-mentioned y1, y2 are respectively 16.5,18), if so, 1 internal flow form of deduster is hydrostatic potential difference pattern；If
It is then shearing liquid curtain pattern or resonance water attack pattern not to be.Then, detect low frequency band peak value corresponding to frequency whether
In [0,0.3] (value of i.e. above-mentioned n1, n2 are respectively 0,0.3) range (resonance low frequency frequency fluctuation range when generation), examine simultaneously
The frequency corresponding to the peak value in intermediate-frequency band is surveyed whether in [10,15] (value of i.e. above-mentioned n3, n4 are respectively 10,15) range
Otherwise (intermediate frequency fluctuation range when resonating) detects intermediate frequency if meeting the two conditions simultaneously for resonance water attack pattern
Whether the frequency corresponding to peak value in frequency range (occurs in [15,20] (value of i.e. above-mentioned q5, q6 are respectively 15,20) range
Intermediate frequency fluctuation range when shearing), if to shear liquid curtain pattern；Alternatively, the frequency corresponding to detection low frequency band peak value
Whether (Frequency when small shearing occurs to fluctuate in [6.4,7.4] (value of i.e. above-mentioned q1, q2 are respectively 6.4,7.4) range
Range), while whether the frequency corresponding to the peak value in intermediate-frequency band is detected in [10,12.6] (the value difference of i.e. above-mentioned q3, q4
It is 10,12.6) (intermediate frequency fluctuation range when small shearing occurs) in range, also it is shearing liquid if meeting the two conditions simultaneously
Curtain pattern, if not satisfied, being then other patterns.
Claims (12)
1. a kind of recognition methods of deduster gas-liquid mixture phase, which is characterized in that the pressure by acquiring house outlet is believed
Number, gas liquid two-phase flow information entrained in Pressure Fluctuation Signal is analyzed to detect gas-liquid two-phase admixture, specific steps
For：
Step 1) makes gas-liquid mixture phase and identifies sample：
Gas-liquid couple state is divided into faint fluctuation model, hydrostatic potential difference pattern, resonance water attack pattern, shearing liquid curtain by step 1.1)
Pattern and volume air-breathing steep pattern；
Step 1.2) acquires the pressure wave at wind speed, liquid level and house outlet under above-mentioned five kinds of patterns in deduster respectively
Dynamic information, while the corresponding level parameter of different mode is measured, the pressure oscillation information under different wind speed, liquid level is counted
Analysis, spectrum analysis, obtain dust remover resistance changing rule, sort out the drag characteristics value of corresponding modes, and obtain pressure wave
The power spectral density PSD changes in distribution situation of dynamic information show that deduster gaseous pressure vibration frequency mainly concentrates range, and will
Frequency range is divided into n frequency range；
Step 1.3) extracts the feature vector that can distinguish different mode respectively, including power spectrum from power spectral density plot
Frequency range in density map under the peak ranges of each frequency range, relative peak range and different mode corresponding to peak value, in conjunction with resistance
Force characteristic and level parameter, then sort out the range of each feature vector value, and are calculated, and determine feature vector under each pattern
Correspondence section；Wherein, the specific level under hydrostatic potential difference pattern ranging from [y1, y2]；Low frequency band under the water attack pattern that resonates
Frequency range corresponding to peak value is [n1, n2], and the frequency range corresponding to intermediate-frequency band peak value is [n3, n4]；Shear liquid curtain
Frequency range under pattern corresponding to intermediate-frequency band peak value is [q5, q6], is occurred when small shearing corresponding to low frequency band peak value
Frequency range is [q1, q2], and the frequency range corresponding to intermediate-frequency band peak value is [q3, q4]；
Wind speed, liquid level and pressure oscillation information under step 2) acquisition operating status in deduster are simultaneously analyzed, obtain with
The feature vector corresponding to feature vector in step 1.3；
Step 2.1) is acquired pressure oscillation original signal by monitoring system, obtains its power spectral density plot, obtains simultaneously
Take wind speed and liquid level information；
Step 2.2) analyzes original signal and power spectral density plot, the higher correlated characteristic vector of extraction discrimination, i.e.,
The peak ranges and relative peak range of each frequency range：
Step 2.2.1) power spectral density plot is divided into n frequency range, it extracts respectively under each pattern first in power spectral density plot
Then peak-peak in frequency range to the n-th frequency range sorts out each frequency range peak ranges under each pattern；
Step 2.2.2) percentage of second frequency range to the n-th frequency range relative to the first frequency range under all patterns is calculated, and arrange
Go out the relative peak range under each pattern：
The gas-liquid coupled mode in the deduster under operating status is identified in step 3)：
Two feature vector ranges of the step 3.1) based on step 2.2 are made with the individual features ranges of vectors that step 1.3 is extracted
Compare, since the maximum value of the peak value of faint fluctuation model high band is also low compared with the minimum value of other pattern high band peak values, volume
The minimum value of air-breathing bubble pattern high band peak value is obviously higher by compared with the maximum value of other pattern high band peak values, therefore can be well
Identify faint fluctuation model and volume air-breathing bubble pattern；
Step 3.2) then, by pressure oscillation original signal, calculates dust remover resistance size, according to dust remover resistance characteristic,
Detect whether its Resistance Value is more than regulation Resistance Value A, if drag characteristic is more than regulation Resistance Value A, meanwhile, pass through level sensing
Device detects the liquid level of dedusting chamber whether in specific level range [y1, y2] under hydrostatic potential difference pattern, if so, in deduster
Portion's nowed forming is hydrostatic potential difference pattern；If it is not, being then shearing liquid curtain pattern or resonance water attack pattern；
Step 3.3) detects the frequency corresponding to low frequency band peak value whether in [n1, n2] range, while detecting intermediate-frequency band
Whether the frequency corresponding to interior peak value is resonance water attack pattern if meeting the two conditions simultaneously in [n3, n4] range,
Otherwise, the frequency corresponding to the peak value in intermediate-frequency band is detected whether in [q5, q6] range, if to shear liquid curtain mould
Formula；Alternatively, whether the frequency corresponding to detection low frequency band peak value while detecting in intermediate-frequency band in [q1, q2] range
Whether the frequency corresponding to peak value is also shearing liquid curtain pattern if meeting the two conditions simultaneously in [q3, q4] range, if
It is unsatisfactory for, is then other patterns.
2. a kind of recognition methods of deduster gas-liquid mixture phase according to claim 1, which is characterized in that the dedusting
Device gaseous pressure vibration frequency mainly concentrates ranging from 0-30Hz, and frequency range is divided into low 0-10Hz, middle 10-20Hz, height
Tri- frequency ranges of 20-32Hz.
3. a kind of recognition methods of deduster gas-liquid mixture phase according to claim 1, which is characterized in that faint fluctuation
The peak ranges of pattern high band be 0-20020, volume air-breathing bubble pattern high band peak ranges be 1.51851E+6~
2.53083E+7。
4. a kind of recognition methods of deduster gas-liquid mixture phase according to claim 1, which is characterized in that the regulation
Resistance Value A is 300Pa.
5. a kind of identification device of deduster gas-liquid mixture phase, described in Claims 1 to 4 any one claim
A kind of recognition methods of deduster gas-liquid mixture phase, which is characterized in that including pressure-inducting device, liquid level sensor, anemobiagraph, liquid
Face is transmitted and stabilizing adjusting device, data collecting card and computer；The deduster includes inlet channel, sink, dedusting chamber, limit
Flowing plate, dewatering plate and dedusting fan, the inlet channel are set to sink side, dedusting chamber, current limiting plate, dewatering plate and dedusting wind
Machine is sequentially set to above sink, and choke block is arranged in one end that inlet channel is connect with sink, forms restriction；The anemobiagraph peace
In inlet channel；The liquid level transmits and stabilizing adjusting device is mounted on the lower section of restriction；Liquid level transmits and stablizes and adjusts
Regulating device is rectangle baffle, is installed with groove body plane perpendicular, and the shape between the side wall of groove body installation inlet channel side
At level gauging room, the top of baffle extends to groove body side wall arc closes level gauging ceiling mouth, and baffle lower part is grown along it
The liquid-passing hole of degree setting connection level gauging room and groove body, liquid level sensor are set to above space interior；The pressure-inducting device peace
Mounted in the lower section of dedusting fan；The main body of the pressure-inducting device is a L-shaped pipeline, and lateral tube body is arranged with inside deduster
Pressure point be threadedly coupled, longitudinal pipe body be located at deduster outside is threadedly coupled with pressure sensor, along corner inside pipeline
Outer rim tube wall setting recess catch basin, catch basin is connected with downward drainpipe, under working condition the outer end of L-shaped pipeline with
End cap seal.
6. a kind of identification device of deduster gas-liquid mixture phase according to claim 5, which is characterized in that the pipeline
Internal diameter 6-10mm.
7. a kind of identification device of deduster gas-liquid mixture phase according to claim 5, which is characterized in that the L-shaped
Pipeline total length controls within 12cm, wherein vertical direction 3-5cm.
8. a kind of identification device of deduster gas-liquid mixture phase according to claim 5, which is characterized in that the pressure
Point is arranged below the air port of dedusting fan.
9. a kind of identification device of deduster gas-liquid mixture phase according to claim 5, which is characterized in that the liquid level
It transmits and stabilizing adjusting device selects resistant material to be made.
10. a kind of identification device of deduster gas-liquid mixture phase according to claim 5, which is characterized in that the liquid
The groove body side wall wall surface 10-20cm that face is transmitted and stabilizing adjusting device distance is closer with it.
11. a kind of identification device of deduster gas-liquid mixture phase according to claim 5, which is characterized in that the liquid
The 1/15-1/20 that face is transmitted and the liquid-passing hole aperture of stabilizing adjusting device is barrier width, be dislocatedly distributed setting.
12. a kind of identification device of deduster gas-liquid mixture phase according to claim 5, which is characterized in that the liquid
Level sensor range:0~0.6m, signal output:0~5V DC, response time≤5ms, repeatable accuracy ± 1.0mm, environment temperature
- 30~+85 DEG C of degree.
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| CN108593191A (en) * | 2018-03-05 | 2018-09-28 | 中国矿业大学 | A kind of wet-scrubbing equipment gas-liquid two-phase flow pattern recognition methods |
| CN111521259B (en) * | 2020-04-30 | 2022-02-18 | 中国恩菲工程技术有限公司 | Grinding machine detection method, device and equipment |
| CN111544975A (en) * | 2020-06-09 | 2020-08-18 | 中机国能电力工程有限公司 | Dust removing method and device for bag-type dust remover |
| CN115180432B (en) * | 2022-07-02 | 2023-04-28 | 中国矿业大学 | Fault monitoring system for ore tank dust removal, dust removal system and variable frequency control method thereof |
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