CN104984662A - Ultrasonic auxiliary filtering membrane damage simulation test device and test method - Google Patents
Ultrasonic auxiliary filtering membrane damage simulation test device and test method Download PDFInfo
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- CN104984662A CN104984662A CN201510416634.XA CN201510416634A CN104984662A CN 104984662 A CN104984662 A CN 104984662A CN 201510416634 A CN201510416634 A CN 201510416634A CN 104984662 A CN104984662 A CN 104984662A
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Abstract
The invention discloses an ultrasonic auxiliary filtering membrane damage simulation test device and a test method. An ultrasonic transducer box is vertically positioned at the right side inside a test pool for dividing the inside of the test pool into a left region and a right region; the ultrasonic transducer box can leftwards and rightwards move and is in sealed contact with the test pool; the left side region is vertically provided with a flat membrane; the flat membrane is clamped by a front side clamp plate and a right side clamp plate; a sound intensity probe is arranged at the front wall part of the back side clamp plate; the center part of the ultrasonic transducer box is connected with the left end of a horizontal screw rod in a rolling way; the right end of the screw rod extends out of the test pool through the right side wall of the test pool and is axially connected with a screw nut with teeth in a sleeving way; the screw nut with teeth is connected with a gear through a belt with teeth; the gear is connected with an output shaft of a step motor in a concentric way. On the premise of the fixed ultrasonic output power of each gear, the rotation of the step motor is precisely controlled by combining an MCU (micro control unit) control system; the ultrasonic intensity is changed through changing the distance between an ultrasonic source and the membrane; the effect that the ultrasonic intensity is roughly adjusted at first and is then finely adjusted is achieved; the obtained rest data is more comprehensive.
Description
Technical field
The present invention relates to UF membrane field, particularly the ultrasonic drainage film of a kind of simulation damages experimental provision and method.
Background technology
UF membrane be multicomponent fluid material is separated, classification, purification and enrichment, there is the particular advantages such as efficient, energy-conservation, process is easy to control.But concentration polarization and fouling membrane are two subject matters existed in membrane separating process, they can destroy the performance of film and the life-span of final shortening film, increase the operation and maintenance expense of film, and product quality and target product yield can be caused to reduce.For improving UF membrane efficiency, alleviating concentration polarization and fouling membrane, in recent years, adopting ultrasonic wave to strengthen membrane separating process.Research shows: ultrasonic wave can be used as the assisted and strengthened means of UF membrane operation to improve permeation flux.But, when ultrasound intensity increases, Acoustic Wave Propagation will produce certain impact or effect to medium: namely along with ultrasonic intensity increases, hyperacoustic cavitation strengthens, the aperture that consequent sonochemical effect and physical effect cause film increases or face breakage, and its flux is increased.
At present, membrane module is mainly placed in ultrasonic cleaner on the laboratory facilities of the impact of film itself by research ultrasonic wave, by regulating the power output of ultrasonic cleaner to change hyperacoustic intensity, and then studies the impact of different ultrasound intensity on film.But the adjustable power output of existing ultrasonic cleaner only has several grades, so corresponding ultrasound intensity is limited in scope, and cannot realize the continuous fine thin tuning of ultrasound intensity, therefore result of study is not comprehensive comparatively speaking.In addition, above-mentioned experimental technique is all rely on experimenter detect each parameter or regulate and control, and workload is comparatively large, and easily produces certain error, thus affects experimental result.
Summary of the invention
For overcoming above-mentioned shortcoming, the present invention proposes the ultrasonic drainage film of a kind of simulation and damages experimental provision and method, fine tuning after the first coarse adjustment of ultrasound intensity, accurately can change ultrasound intensity, under MCU control system automatically, not only alleviate the working strength of experimenter but also the human error that experimenter brings can be reduced.
A kind of technical scheme simulating the employing of ultrasonic drainage film damage experimental provision of the present invention is: have an experiment pool, Flat Membrane and ultrasonic transducer box are put in experiment pool inside, ultrasonic transducer box is vertically positioned at experiment pool inner right side place and experiment pool inside is divided into two pieces of regions, left and right, ultrasonic transducer box can move left and right and seal with experiment pool and contact, left field is vertically provided with Flat Membrane, Flat Membrane is clamped by front side clamping plate and rear side clamping plate, and the antetheca place of rear side clamping plate is provided with sound intensity probe; The experiment pool inwall of left field is provided with liquid level sensor; The sidewall of the left field of experiment pool is provided with drainage pipeline, and drainage pipeline is equipped with magnetic valve; Roll and connect the left end of horizontal screw bolt in the center of ultrasonic transducer box, the right-hand member of screw rod stretches out the outer also coaxial sleeve tape splicing teeth nut of experiment pool through experiment pool right side wall, band teeth nut connects gear by toothed timing belt, and gear concentric connects the output shaft of stepper motor; The inner left wall of ultrasonic transducer box is evenly equipped with multiple identical ultrasonic transducer, and ultrasonic transducer connects supersonic generator through output line; MCU control system connects stepper motor, liquid level sensor, sound intensity probe, magnetic valve and host computer respectively by different control ports.
The technical scheme that a kind of experimental technique of simulating ultrasonic drainage film damage experimental provision of the present invention adopts comprises the following steps:
Step 1: the power output of supersonic generator is adjusted to deep low gear, ultrasonic transducer is moved to the rightmost side initial position in experiment pool by control step motor reversal;
Step 2: add feed liquid in the left field of experiment pool, and keep liquid level to be H
0;
Step 3:MCU control system gathers the ultrasound intensity I of sound intensity probe, and after running a period of time T, take out Flat Membrane, recording film flux is J;
Step 4: after Flat Membrane is put into experiment pool again, the distance between the right side clamping plate judging ultrasonic transducer box and Flat Membrane
whether be 0, if
, control step motor rotates forward; If d=0, stepper motor reverses, until ultrasonic transducer box moves to initial position, regulates the power output of supersonic generator to next gear, repeats step 2 ~ 4, until the power output gear of supersonic generator all regulates complete.
Under step 1 ~ 4 obtain different ultrasound intensity I, different running time T and corresponding film damage the multisample data of degree L, adopt BP artificial neural network algorithm constructor through host computer
, after carrying out corresponding training, preserve corresponding BP artificial nerve network model; According to ultrasound intensity I, estimate the processing time T of different film damage corresponding to degree L
The present invention is compared with existing Method and Technology, and tool has the following advantages:
1, the relation that exists between the two according to ultrasound intensity I and distance d of the present invention, the distance d between ultrasound source and film is changed in conjunction with the accurate control step electric machine rotation of MCU control system, thus change ultrasound intensity I, provide certain foundation for ultrasonic drainage film damages research.
2, the present invention is under each grade of fixing ultrasonic power output prerequisite, ultrasound intensity I can be changed by distance d accurately between control step electric machine rotation change ultrasound source and film in conjunction with MCU control system, realize the first coarse adjustment of ultrasound intensity to combine with rear fine tuning, so the ultrasound intensity I scope that can study just can correspondingly expand, make follow-up result of study more reliable, what the current ultrasonic drainage research of effective solution existed cannot the continuity problem of meticulous adjustment ultrasound intensity problem and experimental implementation, thus the experimental data obtained is more comprehensive, be conducive to the follow-up study that ultrasonic drainage film damages.
3, the present invention utilizes MCU control system control step electric machine rotation change ultrasound intensity I and gather this intensity I value, simultaneity factor Real-time Collection liquid level signal H with the switch of Controlling solenoid valve to realize the Auto-drainage of experimental provision, thus improve the automaticity of experimental provision, not only alleviate the working strength of experimenter but also the human error that experimenter brings can be reduced.
4, the present invention damages the relation existed between degree L, ultrasound intensity I and processing time T three according to film, adopts the functional relation model between BP neural network algorithm matching film damage degree L, ultrasound intensity I and processing time T three
thus can estimate under different ultrasound intensity I according to this function model, different films damages film T service time corresponding to degree L, the critical point of film T service time under different ultrasound intensity I can be found (namely when film is without damage, the service time of film), for the selection of membrane separation process parameter provides foundation.
Accompanying drawing explanation
Fig. 1 is a kind of overall structure figure simulating ultrasonic drainage film damage experimental provision of the present invention;
Fig. 2 is the schematic enlarged-scale view of ultrasonic transducer box 15 in Fig. 1;
Fig. 3 simulates the circuit structure block diagram that ultrasonic drainage film damages experimental provision for the present invention shown in Fig. 1 is a kind of;
Fig. 4 simulates the experimental technique flow chart that ultrasonic drainage film damages experimental provision for the present invention shown in Fig. 1 is a kind of.
The sequence number of each parts and title in accompanying drawing: 1, experiment pool, 2, liquid level sensor, 3, screw, 4, sound intensity probe, 5, the left clamping plate in front side, 6, the right clamping plate in front side, 7, the left clamping plate of rear side, 8, the right clamping plate of rear side, 9, drainage pipeline, 10, magnetic valve, 11, tank, 12, MCU control box, 13, stepper motor rotates forward switch, 14, stepper motor reversal switch, 15, ultrasonic transducer box, 16, host computer, 17, stepper motor, 18, gear, 19, screw rod, 20, band teeth nut, 21, latch segment, 22, toothed timing belt, 23, bracing frame, 24 supersonic generators, 25, entrance hole, 26, supersonic generator output line, 27, stepper motor base, 28, screw rod manhole appendix, 29, ultrasonic transducer, 30, rolling bearing, 31, Flat Membrane.
Detailed description of the invention
The present invention shown in Figure 1 is a kind of simulates the overall structure that ultrasonic drainage film damages experimental provision, and have an experiment pool 1, experiment pool 1 inside is cavity, puts Flat Membrane 31 and ultrasonic transducer box 15 in experiment pool 1 inside.Ultrasonic transducer box 15 is vertically positioned at experiment pool 1 inner right side place, experiment pool 1 inside is divided into two pieces of regions, left and right, left field internal memory blowing liquid.Ultrasonic transducer box 15 front and rear wall seals to contact with both sides, the front and back inwall of experiment pool 1 as far as possible avoids left field feed liquid to infiltrate right side area, also needs to guarantee that ultrasonic transducer box 15 can move left and right in experiment pool 1 simultaneously.Also vertically arrange Flat Membrane 31 in left field, Flat Membrane 31 is best apart from experiment pool 1 inside left side wall 1/3 place.
Flat Membrane 31 is by front side clamping plate and rear side clamping plate stable holding.Wherein front side clamping plate are formed by the left clamping plate in front side 5 and the right clamping plate 6 in front side and are arranged on the front inner wall place of experiment pool 1, rear side clamping plate are formed by the left clamping plate of rear side 7 and the right clamping plate 8 of rear side and are arranged on inwall place on rear side of experiment pool 1, meanwhile, front side clamping plate and rear side clamping plate are front and back symmetrical expression distributions.Flat Membrane 31 is inserted in the middle of the left and right clamping plate of both sides, front and back.Distance between the left clamping plate 5 in front side and the right clamping plate in front side 6, the left clamping plate of rear side 7 slightly larger than the left and right thickness of Flat Membrane 31, so that take out and insert Flat Membrane 31, should guarantee that Flat Membrane 31 can not be too loosening with the distance of the right clamping plate 8 of rear side simultaneously.
Fixedly mount sound intensity probe 4 at the antetheca place of rear side clamping plate by screw 3, sound intensity probe 4, near Flat Membrane 31 right flank, facing to ultrasonic transducer box 15, is used for gathering the ultrasound intensity I that ultrasonic wave arrives Flat Membrane 31 place.Sound intensity probe 4 is arranged on the antetheca place of the right clamping plate 8 of rear side by the present invention, is convenient to gather ultrasound intensity.
The left field inwall of experiment pool 1 fixedly mounts liquid level sensor 2 by another screw 3, is mainly used to the liquid level signal gathering experiment pool 1.Liquid level sensor 2 is fixed on the rear side inwall between the left side and the left clamping plate 7 of rear side of experiment pool 1 inside by the present invention, is convenient to collection signal.
Center rolling connecting screw rod 19 left end of ultrasonic transducer box 15, the screw rod manhole appendix 28 that screw rod 19 right-hand member is offered on experiment pool 1 right side wall stretches out outside experiment pool 1, screw rod 19 is horizontally disposed with, coaxial sleeve tape splicing teeth nut 20 on screw rod 19 outside experiment pool 1, left and right two ends with teeth nut 20 are fastenedly connected a latch segment 21, latch segment 21 coaxial sleeve, on screw rod 19, is used for the moving left and right of check strap teeth nut 20.Screw rod 19, band teeth nut 20 and latch segment 21 are all that concentric is installed.Being bracing frame 23 below latch segment 21, is toothed timing belt 22 below band teeth nut 20.Latch segment 21 is welded as a whole with the upper end of bracing frame 23, and the lower end of bracing frame 23 is then fixed on the ground by other screw 3.Band teeth nut 20 connects gear 18 by toothed timing belt 22, and gear 18 concentric connects the output shaft of stepper motor 17.Stepper motor 17 is fixed on the ground by stepper motor base 27.When stepper motor 17 positive and negative rotation, gear 18 also can positive and negative rotation, gear 18 drives band teeth nut 20 to do positive counter-movement by toothed timing belt 22, thus drives screw rod 19 to move left and right, and the ultrasonic transducer box 15 be connected with screw rod 19 left end is moved left and right in experiment pool 1.
Stepper motor 17 is connected MCU control box 12, MCU control box 12 by electric wire and is connected with host computer 16 by electric wire.MCU control system is provided with in MCU control box 12.Regulate the displacement of ultrasonic transducer box 15 for ease of experimenter, stepper motor 17 by being wired to the right side of MCU control box 12, and is provided with stepper motor rotating forward switch 13 and stepper motor reversal switch 14 at the top of MCU control box 12.When press stepper motor rotate forward switch 13, MCU control system then control step motor 17 rotate forward once, otherwise when pressing stepper motor reversal switch 14, then MCU control system control step motor 17 reverses once.
The initial position of ultrasonic transducer box 15 is arranged on the inner rightmost side of experiment pool 1, and is D from the left and right distance of the right side clamping plate of Flat Membrane 31.According to the gearratio m of band teeth nut 20 with screw rod 19, can show that band teeth nut 20 needs the angle of rotating to be m × D, again according to gear 18 and the speed ratio i being with teeth nut 20, show that gear 18 needs the angle of rotating to be m × D × i, again according to the step angle θ of stepper motor 17, show that the umber of pulse needed for stepper motor 17 is m × D × i/ θ.MCU control system sends a pulse signal to stepper motor 17, and stepper motor 17 just promotes ultrasonic transducer box 15 displacement and is
=D/ (m × D × i/ θ).The present invention specifies: when stepper motor 17 rotates forward, then ultrasonic transducer box 15 is moved to the left distance and is
, when stepper motor 17 reverses, then ultrasonic transducer box 15 distance that moves right is
.Suppose that stepper motor 17 rotates forward number of times and is
, between the right side clamping plate of so ultrasonic transducer box 15 and Flat Membrane 31, the left and right distance at interval is
.
Due in experimentation, the left field of ultrasonic transducer box 15 is equipped with feed liquid, the distance between ultrasonic transducer box 15 and the right side clamping plate of Flat Membrane 31
time more and more less, the height H of the feed liquid in left side can be more and more higher, for preventing feed liquid liquid level too high, the sidewall of the left field of experiment pool 1 is provided with drainage pipeline 9, drainage pipeline 9 is located on experiment pool 1 front side wall of the zone line between the right clamping plate 6 in front side and ultrasonic transducer box 15 by the present invention, below drainage pipeline 9, place tank 11, install magnetic valve 10 in drainage pipeline 9, magnetic valve 10 is by being wired to MCU control box 12.Specific works process is as follows: detect liquid level signal by liquid level sensor 2, i.e. feed liquid height H, and the MCU control system in MCU control box 12 gathers this liquid level signal H and judges whether to exceed default threshold value H
0.If liquid level signal value H is greater than threshold value H
0, then MCU control system opens solenoid valve 10, then drainage pipeline 9 is unimpeded, and feed liquid just flows in tank 11 from drainage pipeline 9, until liquid level signal value recovers normal, MCU control system shut electromagnetic valve 10, then stop discharge feed liquid.Record experimental data for ease of experimenter, each parameter is sent to host computer 16 by MCU control system in real time, data preservation is for further processing by host computer 16.
Ultrasonic transducer box 15 structure shown in Figure 2 again, cylindrical rolling bearing 30 is embedded from right side wall perforate in the center of ultrasonic transducer box 15, ultrasonic transducer box 15 is by the left end of rolling bearing 30 connecting screw rod 19, and rolling bearing 30 and screw rod 19 concentric are installed.Permeate to the right, in the left side wall center not perforate of ultrasonic transducer box 15 for avoiding experiment pool 1 inside left feed liquid.Ultrasonic transducer box 15 is the hollow boxes be fabricated from iron, the inner left wall of ultrasonic transducer box 15 is evenly installed the ultrasonic transducer 29 of multiple same size, during actual installation, the number N of ultrasonic transducer 29 is decided by the left side wall area of ultrasonic transducer box 15, supposes that ultrasonic transducer 29 area occupied is
, the left side wall area of ultrasonic transducer box 15 is
, then
.Entrance hole 25 is provided with in the upside of ultrasonic transducer box 15.The supersonic generator 24 being positioned at experiment pool 1 outside is connected with ultrasonic transducer 29 after introducing entrance hole 25 by supersonic generator output line 26, all ultrasonic transducer 29 connected modes are in parallel, then the power output of the maximum gear of supersonic generator 24
for the rated power of N number of ultrasonic transducer 29
sum, namely
.
The ultrasonic drainage film of the present invention shown in Figure 3 damages the circuit structure of analogue experiment installation, and what place in MCU control box 12 is the surface-mounted integrated circuit be made up of interlock circuits such as liquid level signal modulate circuit, sound intensity signal conditioning circuit, A/D change-over circuit, MCU control system, stepper motor driving circuit and power supply modules.The present invention is with MCU control system for core, and MCU control system is by different control ports connecting fluid level sensor 2, sound intensity probe 4, magnetic valve 10 and host computer 16 respectively.Liquid level sensor 2 connects the input of MCU control system through liquid level signal modulate circuit, sound intensity probe 4 connects the input of MCU control system through sound intensity signal conditioning circuit, the output of MCU control system connects stepper motor respectively and rotates forward switch 13 and reversal switch 14, stepper motor rotates forward switch 13 and is all connected with the input of stepper motor driving circuit with reversal switch 14, and the output of stepper motor driving circuit is then connected with stepper motor 17.Magnetic valve 10 and host computer 16 are all connected to the output of MCU control system.Power supply module is then for each required parts provide power supply.
The ultrasonic drainage film of the present invention shown in Figure 4 damages experimental technique, at present, membrane module is mainly placed in ultrasonic cleaner on the laboratory facilities of the impact of film itself by research ultrasonic wave, changes hyperacoustic intensity by regulating the power output of ultrasonic cleaner.But the adjustable power output of existing ultrasonic cleaner only has several grades, each grade is all correspond to a fixing ultrasonic power, i.e. a fixing ultrasound intensity.So can only study several ultrasound intensity in experimentation under, ultrasonic wave is on the impact of film, and therefore result of study is comprehensive not.And the experimental provision of the present invention's design, under each grade of fixing ultrasonic power output prerequisite, can continue to change ultrasound intensity, therefore, the result of research relatively more comprehensively, reliable.Power output now for the minimum gear of supersonic generator is that example is as follows so that the experimental technique of this experimental provision to be described:
First, open supersonic generator 24, power output is adjusted to a minimum gear.Press stepper motor reversal switch 14, stepper motor 17 is reversed, driven gear 18, band teeth nut 20, screw rod 19 move successively, ultrasonic transducer 15 are moved to initial position (rightmost side of experiment pool 1 inside).Secondly, add feed liquid in experiment pool 1 internal ultrasonic wave transducer box 15 left field, and keep liquid level to be H
0.Gathered the output valve I of sound intensity probe 4 by MCU control system, after running a period of time T, take out Flat Membrane 31, utilize conventional Flat Membrane filter to filter pure water under rigid condition, and recording film flux is J.Tentative standard membrane flux is J
0, then calculate
value, if
, then film damages degree L=0, namely damages without film; If
, then film damages degree L=100%.According to mentioned above principle, calculate corresponding film according to the membrane flux J of record and damage degree L, and record corresponding running time T ultrasound intensity I.Then, Flat Membrane 31 is put into experiment pool 1 again.When continuing experiment next time, the distance between the right side clamping plate judging ultrasonic transducer box 15 and Flat Membrane 31
whether be 0, namely whether move to the end in left side.If
, then experiment is continued.Press stepper motor to rotate forward switch 13, MCU control system control step motor 17 and rotate forward, then ultrasonic transducer box 15 is moved to the left distance and is
, then MCU control system gathers liquid level sensor signal value H, and with set level threshold H
0compare: if
, MCU control system opens solenoid valve 10, thus drainage pipeline 9 conducting, be discharged to unnecessary feed liquid in tank 11, until
after, then shut electromagnetic valve 10 stops draining, then repeats aforesaid operations.If d=0, then need to press stepper motor reversal switch 14, MCU control system control step motor reversal, until after ultrasonic transducer box 15 moves to initial position, can continue to regulate the power output of supersonic generator 24 to next gear, repeating test operates, until the power output of supersonic generator 24 stops experiment after being adjusted to maximum gear.
The ultrasonic drainage film of simulation of the present invention's design damages experimental provision object and is to study the impact on Flat Membrane in ultrasonic wave drainage Flat Membrane process, and finds the crash time that film damages under the ultrasonic drainage of different ultrasound intensity.Research shows: can cause damage to film during ultrasonic wave process, and its extent of damage and ultrasonic intensity and ultrasonic treatment time have certain relation, and namely film damages the pass existed between degree L, ultrasound intensity I and processing time T three and is
.In order to simulate the function model of three, and can estimate under different ultrasound intensity I, different films damages the processing time T corresponding to degree L, and then provides certain reference frame to the selection of membrane separation process parameter, and the present invention adopts BP artificial neural network algorithm to process.Detailed process is as follows: during upper computer software employing BP artificial neural network process, utilizes film to damage the pass existed between degree L, ultrasound intensity I and processing time T three and is
, adopt BP neural network algorithm to process.Using the input variable of ultrasound intensity I and processing time T as neural network model, film damages degree L then as the output variable of neural network model, can constructor
.Simulate the functional relation between three, enough sample datas must be obtained.Utilize the experimental provision that the present invention designs, respectively with different ultrasound intensity I, and process different time T respectively, then obtain corresponding film respectively and damage degree L, obtain enough sample datas by above-mentioned experimental technique.Then, selected part experimental data is as extensive sample data, and other data are as training sample, and step-up error desired value and Studying factors are used for network training, obtain the weights and threshold after training.According to the parameter obtained, judge whether extensive result reaches the error requirements of system, if reach systematic error requirement, then keep corresponding BP artificial nerve network model, if do not reach systematic error requirement, then to revise after Studying factors training network again, until meet the error requirements of system.By the BP artificial nerve network model trained, just can according to estimating under different ultrasound intensity I, different films damages the sonication treatment time T corresponding to degree L, i.e. T service time of film under ultrasonic drainage condition.
Ultrasonic drainage film damage analogue experiment method concrete steps of the present invention are as follows:
Step 1: open supersonic generator 24, ultrasonic power output is adjusted to deep low gear.Press stepper motor reversal switch 14, control step motor 17 reverses, and ultrasonic transducer 15 is moved to initial position (rightmost side in experiment pool 1).
Step 2: in experiment pool 1 and ultrasonic transducer box 15 left field adds feed liquid, and keep liquid level to be H
0.
Step 3: the output valve being gathered the ultrasound intensity I of sound intensity probe 4 by MCU control system, after running a period of time T, takes out Flat Membrane 31, utilize Flat Membrane filter to filter pure water under rigid condition, and recording film flux is J.In conjunction with known standard film flux J
0, and calculate film damage degree
value.If
, then film damages degree L=0, namely damages without film; If
, then film damages degree L=100%, then 100% film damages.According to mentioned above principle, calculate corresponding film according to the membrane flux J of record and damage degree L, and record corresponding running time T ultrasound intensity I, and be saved on host computer 16.
Step 4: after Flat Membrane 31 is put into experiment pool 1 again, the distance between the right side clamping plate judging ultrasonic transducer box 15 and Flat Membrane 31
whether be 0, namely whether move to the end.If
, then press stepper motor and rotate forward switch 13, MCU control system control step motor 17 and rotate forward, then ultrasonic transducer box 15 is moved to the left distance and is
, then MCU control system gathers liquid level sensor liquid level signal value H, and with set level threshold H
0compare: if
, MCU control system opens solenoid valve 10, thus drainage pipeline 9 conducting, be discharged to unnecessary feed liquid in tank 11, until
after, then shut electromagnetic valve 10 stops draining, then repeats above-mentioned steps 2 ~ 4.
Step 5: if d=0, then need to press stepper motor reversal switch 14, MCU control system control step motor 17 and reverse, until ultrasonic transducer box 15 moves to initial position.Regulate the power output of supersonic generator 24 to next gear, repeat step 2 ~ 5, until the power output gear of supersonic generator 24 all regulates complete, terminate experiment.
Step 6: step 1 ~ 5 obtain abundant multisample data by experiment: under different ultrasound intensity I, different running time T and corresponding film damage degree L.After host computer 16 preserves all experimental datas, upper computer software is utilized to adopt BP artificial neural network algorithm constructor
, and train accordingly.By training, preserve corresponding BP artificial nerve network model.Then according to ultrasound intensity I, the running time T of different film damage corresponding to degree L can be estimated, namely under ultrasonic drainage condition, film T unspoiled service time under different ultrasound intensity I, thus provide certain reference frame can to membrane separation process Selecting parameter.
Claims (8)
1. the ultrasonic drainage film of simulation damages experimental provision, there is an experiment pool (1), it is characterized in that: Flat Membrane (31) and ultrasonic transducer box (15) are put in experiment pool (1) inside, ultrasonic transducer box (15) is vertically positioned at experiment pool (1) inner right side place and experiment pool (1) inside is divided into two pieces of regions, left and right, ultrasonic transducer box (15) can move left and right and seal with experiment pool (1) and contact, left field is vertically provided with Flat Membrane (31), Flat Membrane (31) is clamped by front side clamping plate and rear side clamping plate, the antetheca place of rear side clamping plate is provided with sound intensity probe (4), experiment pool (1) inwall of left field is provided with liquid level sensor (2), the sidewall of the left field of experiment pool (1) is provided with drainage pipeline (9), drainage pipeline (9) is equipped with magnetic valve (10), roll and connect the left end of horizontal screw bolt (19) in the center of ultrasonic transducer box (15), the right-hand member of screw rod (19) stretches out experiment pool (1) and coaxial sleeve tape splicing teeth nut (20) outward through experiment pool (1) right side wall, band teeth nut (20) connects gear (18) by toothed timing belt (22), and gear (18) concentric connects the output shaft of stepper motor (17), the inner left wall of ultrasonic transducer box (15) is evenly equipped with multiple identical ultrasonic transducer (29), and ultrasonic transducer (29) connects supersonic generator (24) through output line, MCU control system connects stepper motor (17), liquid level sensor (2), sound intensity probe (4), magnetic valve (10) and host computer (16) respectively by different control ports.
2. the ultrasonic drainage film of a kind of simulation damages experimental provision according to claim 1, it is characterized in that: described front side clamping plate are formed by the left clamping plate in front side (5) and the right clamping plate in front side (6) and are contained in the front inner wall place of experiment pool (1), rear side clamping plate are made up of the left clamping plate of rear side (7) and the right clamping plate of rear side (8) and are contained in experiment pool (1) rear side inwall place, simultaneously, front side clamping plate and rear side clamping plate are front and back symmetrical expression distributions, and Flat Membrane (31) is inserted in the middle of the left and right clamping plate of front and rear sides.
3. the ultrasonic drainage film of a kind of simulation damages experimental provision according to claim 1, it is characterized in that: the left and right two ends of band teeth nut (20) are fastenedly connected the latch segment (21) of a coaxial sleeve on screw rod (19), latch segment (21) is fixedly connected with the bracing frame (23) of below, and bracing frame (23) fixes on the ground.
4. the ultrasonic drainage film of a kind of simulation damages experimental provision according to claim 1, it is characterized in that: the right side wall perforate of the center of ultrasonic transducer box (15) also embeds cylindrical rolling bearing (30), and ultrasonic transducer box (15) is by the left end of rolling bearing (30) connecting screw rod (19).
5. the ultrasonic drainage film of a kind of simulation damages experimental provision according to claim 1, it is characterized in that: liquid level sensor (2) connects the input of MCU control system through liquid level signal modulate circuit, sound intensity probe (4) connects the input of MCU control system through sound intensity signal conditioning circuit, the output of MCU control system connects stepper motor respectively and rotates forward switch (13) and reversal switch (14), stepper motor rotates forward switch (13) and is all connected with the input of stepper motor driving circuit with reversal switch (14), the output of stepper motor driving circuit is then connected with stepper motor (17), magnetic valve (10) and host computer (16) are all connected to the output of MCU control system.
6. simulate the experimental technique that ultrasonic drainage film damages experimental provision as claimed in claim 1, it is characterized in that comprising the following steps:
Step 1: the power output of supersonic generator (24) is adjusted to deep low gear, ultrasonic transducer (15) is moved to the rightmost side initial position in experiment pool (1) by control step motor (17) reversion;
Step 2: add feed liquid in the left field of experiment pool (1), and keep liquid level to be H
0;
Step 3:MCU control system gathers the ultrasound intensity I of sound intensity probe (4), and after running a period of time T, take out Flat Membrane (31), recording film flux is J;
Step 4: after Flat Membrane (31) is put into experiment pool (1) again, the distance between the right side clamping plate judging ultrasonic transducer box (15) and Flat Membrane (31)
whether be 0, if
, control step motor (17) rotates forward; If d=0, stepper motor (17) reverses, until ultrasonic transducer box (15) moves to initial position, regulates the power output of supersonic generator (24) to next gear, repeat step 2 ~ 4, until the power output gear of supersonic generator (24) all regulates complete.
7. experimental technique according to claim 6, it is characterized in that: different running time T and corresponding film damage the multisample data of degree L under step 1 ~ 4 obtain different ultrasound intensity I, adopt BP artificial neural network algorithm constructor through host computer (16)
, after carrying out corresponding training, preserve corresponding BP artificial nerve network model; According to ultrasound intensity I, estimate the processing time T of different film damage corresponding to degree L.
8. experimental technique according to claim 6, is characterized in that: in step 4, when ultrasonic transducer box (15) is moved to the left, MCU control system gather liquid level sensor (2) level value H, and with set level threshold H
0relatively: if
, MCU control system opens solenoid valve (10), until
rear shut electromagnetic valve (10), then repeats step 2 ~ 4.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN106824906A (en) * | 2017-01-18 | 2017-06-13 | 东旭科技集团有限公司 | A kind of overflow brick cleaning equipment |
| CN106824906B (en) * | 2017-01-18 | 2019-10-11 | 东旭科技集团有限公司 | A kind of overflow brick cleaning equipment |
| CN106583230A (en) * | 2017-01-19 | 2017-04-26 | 重庆市潼南区郑伟沙石厂 | Sand and pebble separator |
| CN107122017A (en) * | 2017-04-24 | 2017-09-01 | 习水县西科电脑科技有限公司 | Cabinet |
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