CN118059552B - A smart cleaning filter press and its cleaning method - Google Patents
A smart cleaning filter press and its cleaning methodInfo
- Publication number
- CN118059552B CN118059552B CN202410235627.9A CN202410235627A CN118059552B CN 118059552 B CN118059552 B CN 118059552B CN 202410235627 A CN202410235627 A CN 202410235627A CN 118059552 B CN118059552 B CN 118059552B
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- Prior art keywords
- cleaning
- filter
- filter plate
- plate
- fiber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/32—Removal of the filter cakes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/143—Filter condition indicators
- B01D35/1435—Filter condition indicators with alarm means
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention provides an intelligent cleaning filter press and a cleaning method thereof. The intelligent cleaning filter press comprises a filter press body, a cleaning unit and a monitoring unit, wherein the monitoring unit comprises a fiber bragg grating sensing module and a control module, the fiber bragg grating sensing module is used for monitoring stress change and temperature change of a filter plate, the control module is respectively and electrically connected with the fiber bragg grating sensing module and the cleaning unit, and the control module is used for judging blocking condition and strain damage of the filter plate according to the stress change and the temperature change of the filter plate monitored by the fiber bragg grating sensing module, starting the cleaning unit to clean the filter plate when the blocking condition exceeds a first preset threshold value, and giving an alarm when the strain damage exceeds a second preset threshold value. According to the intelligent filter plate cleaning device, the filter plates are cleaned intelligently according to the monitored filter plate blocking condition, the cleaning pipes of the cleaning units can be stably inserted between two adjacent filter plates, the filter plates are subjected to movable scouring cleaning, and the cleaning effect is improved.
Description
Technical Field
The invention relates to a filter press and a cleaning method thereof, in particular to an intelligent cleaning filter press and a cleaning method thereof, and belongs to the technical field of filter presses.
Background
In the prior art, a filter chamber of a filter press is generally formed by two adjacent concave filter plates, and the filter chamber has the main advantages that the filter screen or the filter cloth is convenient to replace, but the defects of low filtering efficiency, unsatisfactory effect, easy damage of the filter plates and the like exist.
First, after the filter press is accomplished solid-liquid separation, open the filter plate, the filter cake that is located between two filter plates can be lifted off, but along with long-time use, the filter screen of filter plate both sides can remain partial filter residue, if the filter screen is once blocked, can influence the filtrate and pass to influence the solid-liquid separation effect, consequently, lift off the filter cake at the filter plate after opening the filter plate, need in time clean the filter screen of filter plate both sides, the filter press among the prior art does not be equipped with initiative cleaning device, the step of cleaning the filter screen influences the whole production efficiency of filter press.
Secondly, because the working environment of the filter plate in the filter press is bad, the filter plate is negatively influenced by high-speed and high-pressure flushing of filter materials and water flows, unbalanced pressure at two sides of the filter plate and the like in the service process of the filter plate, and the filter plate is easy to damage to different degrees. If the damaged filter plate is not replaced in time, further damage may be caused to the entire filter press. However, in actual production, the damaged condition of the filter plate cannot be mastered in real time, and the damaged filter plate can be inspected only by relying on the experience of operators.
Disclosure of Invention
Based on the background, the invention aims to provide an intelligent cleaning filter press, which can reliably monitor the blocking condition and the health state of a filter plate in the filter press in real time, intelligently clean the filter plate according to the blocking condition of the filter plate and give an alarm in time according to the health state of the filter plate.
The invention further aims to provide a cleaning method of the intelligent cleaning filter press.
In order to achieve the above object, the present invention provides the following technical solutions:
An intelligent cleaning filter press comprises a filter press body, a cleaning unit and a monitoring unit;
The filter press body comprises a first driving piece, at least two supporting plates and a plurality of filter plates, wherein the filter plates are slidably arranged between the at least two supporting plates, the first driving piece is fixedly connected with one of the supporting plates, and the first driving piece is used for driving the filter plates to slide relative to the supporting plates;
The cleaning unit comprises a cleaning support, a sliding plate, a second driving piece and a plurality of cleaning pipes, wherein two ends of the cleaning support are fixedly connected with at least two supporting plates respectively, the sliding plate is slidably arranged between two ends of the cleaning support, the sliding direction of the sliding plate is perpendicular to the sliding direction of the filter plates, the second driving piece is fixedly connected with the cleaning support, the second driving piece is used for driving the sliding plate to slide relative to the cleaning support, a plurality of the cleaning pipes are fixedly arranged at the bottom of the sliding plate, the cleaning pipes are arranged at intervals along the arrangement direction of the filter plates, each cleaning pipe is positioned between two adjacent filter plates, and a plurality of spray heads which are arranged at intervals along the extension direction of the cleaning pipe are arranged on two sides of each cleaning pipe;
The monitoring unit comprises a fiber bragg grating sensing module and a control module, wherein the fiber bragg grating sensing module is used for monitoring stress variation and temperature variation of the filter plate, the control module is respectively and electrically connected with the fiber bragg grating sensing module and the cleaning unit, and the control module is used for judging blocking conditions and strain damage of the filter plate according to the stress variation and the temperature variation of the filter plate monitored by the fiber bragg grating sensing module, starting the cleaning unit to clean the filter plate when the blocking conditions exceed a first preset threshold value and giving an alarm when the strain damage exceeds a second preset threshold value.
Preferably, the filter press body further comprises a push plate, a stop plate and a plurality of fixing columns, the push plate is fixedly connected with the output end of the first driving piece, the stop plate is fixedly connected with one supporting plate far away from the first driving piece, the fixing columns are arranged between at least two supporting plates, two ends of each fixing column are respectively fixedly connected with at least two supporting plates, and the push plate and the filter plate are sleeved outside the fixing columns.
Preferably, the number of the fixing columns is three, wherein two fixing columns penetrate through the upper part of the filter plate adjacent to one side of the filter plate and the lower part of the filter plate respectively, and the other fixing column penetrates through the lower part of the filter plate adjacent to the other side of the filter plate.
Preferably, the cleaning support comprises a main support and a fixing seat, the main support extends along the arrangement direction of the filter plates, the extending direction of the fixing seat is perpendicular to the extending direction of the main support, a sliding groove is formed in the surface of the fixing seat, a through groove penetrating through the fixing seat is formed in the bottom of the sliding groove in a recessed mode, the sliding plate can slide along the sliding groove, a pipe frame is arranged at the bottom of the sliding plate, and the top end of the cleaning pipe is fixedly connected with the bottom of the sliding plate through the pipe frame.
Preferably, the surface of the fixing seat is also provided with a plurality of limiting blocks, the limiting blocks are oppositely arranged and are respectively positioned at two ends of the fixing seat, at least part of the limiting blocks are positioned above the sliding groove, and the sliding plate is positioned between the limiting blocks which are oppositely arranged.
Preferably, the cleaning unit further comprises a water pump and a water inlet pipe, a water inlet channel is arranged in the cleaning pipe, the water pump is communicated with the water inlet channel of each cleaning pipe through the water inlet pipe, and each spray head is communicated with the water inlet channel.
Preferably, the fiber bragg grating sensing module comprises a light source, an externally attached fiber bragg grating sensor, a fiber bragg coupler and a fiber bragg grating demodulator, wherein continuous frequency modulation laser signals generated by the light source enter the fiber bragg grating of the externally attached fiber bragg grating sensor through a lead, the externally attached fiber bragg grating sensor is uniformly distributed on the outer frame of the filter plate at intervals, and the externally attached fiber bragg grating sensor is sequentially connected with the fiber bragg grating coupler and the fiber bragg grating demodulator through optical fibers.
Preferably, the external-mounted fiber bragg grating sensor is used for monitoring stress variation and temperature variation of an object to be measured according to wavelength variation, and the calculation of the wavelength variation adopts the following mathematical expression:
Where ε is strain, p 11、p12 is elasto-optical coefficient, ν is Poisson's ratio, α is linear expansion coefficient of the material, and ΔT is temperature change.
Preferably, the control module comprises an intelligent analysis sub-module, a blockage analysis feedback sub-module, a health early warning sub-module and a display sub-module, wherein the intelligent analysis sub-module is used for constructing a mechanical simulation model of an operation filter plate and transmitting analysis data to the blockage analysis feedback sub-module and the health early warning sub-module, the blockage analysis feedback sub-module is used for setting a first preset threshold value, loading analysis blockage data and starting a cleaning unit, and the health early warning sub-module is used for setting a second preset threshold value, monitoring strain damage and giving an alarm.
The cleaning method of the intelligent cleaning filter press comprises the following steps:
Constructing a filter plate mechanical simulation model, analyzing the stress state of the filter plate during operation, finding out stress change sensitive points positioned on the outer frame of the filter plate, determining the layout positions and the layout directions of the fiber bragg grating sensing modules according to the stress change sensitive points, collecting the material science data and the historical working condition data of the filter plate, simulating the strain of each part of the filter plate when different types and different parts of damages occur by combining experimental data, and establishing a filter plate damage database;
using thermosetting resin to adhere an externally attached fiber bragg grating sensor of the fiber bragg grating sensing module to the layout position of the outer frame of the filter plate;
Operating the intelligent cleaning filter press, continuously collecting stress changes and temperature changes of the filter plate through the fiber bragg grating sensing module, so as to judge the blocking condition of the filter plate, and starting the cleaning unit to clean the filter plate when the blocking condition exceeds a first preset threshold value;
And determining a real-time strain field and a temperature field of the filter plate according to the stress change and the temperature change of the filter plate, judging the strain damage of the filter plate by combining a filter plate damage database, predicting the residual life of the filter plate, and alarming when the strain damage exceeds a second preset threshold.
Compared with the prior art, the invention has the following advantages:
According to the intelligent cleaning filter press, the filter plates are cleaned intelligently according to the monitored filter plate blocking condition, the cleaning pipes of the cleaning units can be stably inserted between two adjacent filter plates, the filter plates are subjected to movable scouring cleaning, and the cleaning effect is improved;
the invention adopts the externally-attached fiber bragg grating sensor, can directly attach the cloth on the existing filter plate finished product, does not need to redesign a die and a forming process, is convenient for the improvement of the existing filter press finished product, can be rapidly applied to filter plates with different types and specifications, and realizes real-time and reliable monitoring of the blocking condition and the health state of the filter plates in the filter press;
The invention can establish an integral strain temperature field by monitoring the strain and temperature conditions of the filter plate frame, display the strain temperature field by using the model, and timely early warn according to the health state, thereby effectively avoiding property loss possibly caused by filter plate damage, improving the application efficiency of equipment and having remarkable economic benefit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the internal structure of an intelligent cleaning filter press of the present invention;
FIG. 2 is a schematic view of a partial perspective structure of the intelligent cleaning filter press of the present invention;
FIG. 3 is a schematic diagram of a monitoring unit in the present invention;
FIG. 4 is a flow chart of an implementation of the intelligent cleaning filter press of the present invention;
FIG. 5 is a graph of strain testing results of a monitoring unit according to the present invention;
FIG. 6 is a graph of temperature test results of a monitoring unit according to the present invention;
fig. 7 is a real-time visualization of a filter plate in simulation software in accordance with the present invention.
In the figure, 1, a first driving piece; 2, a supporting plate, 3, a filter plate, 4, a push plate, 5, a stop plate, 6, a fixed column, 7, a liquid collecting groove, 8, a cleaning bracket, 9, a sliding plate, 10, a second driving piece, 11, a cleaning pipe, 12, a pipe rack, 13, a spray head, 14, a fiber grating sensing module, 15, an intelligent analysis sub-module, 16, a blockage analysis feedback sub-module, 17, a health early warning sub-module, 18, a display sub-module, 801, a main bracket, 802, a fixed seat, 803, a sliding groove, 804, a through groove, 805, a limiting block, 1001, a driving motor, 1002 and a gear.
Detailed Description
The technical scheme of the invention is further specifically described below through specific embodiments and with reference to the accompanying drawings. It should be understood that the practice of the invention is not limited to the following examples, but is intended to be within the scope of the invention in any form and/or modification thereof.
In the present invention, unless otherwise specified, all parts and percentages are by weight, and the equipment, materials, etc. used are commercially available or are conventional in the art. The methods in the following examples are conventional in the art unless otherwise specified. The components and devices in the following examples are, unless otherwise indicated, all those components and devices known to those skilled in the art, and their structures and principles are known to those skilled in the art from technical manuals or by routine experimentation.
In the following detailed description of embodiments of the invention, reference is made to the accompanying drawings, in which, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. However, one or more embodiments may be practiced by one of ordinary skill in the art without these specific details.
As shown in fig. 1, the embodiment of the invention discloses an intelligent cleaning filter press, which comprises a filter press body, a cleaning unit and a monitoring unit, wherein the filter press body is used for solid-liquid separation, the cleaning unit is used for cleaning filter residues remained on a filter plate 3, and the monitoring unit is used for monitoring and controlling the condition of the filter plate 3.
The filter press body comprises a first drive member 1, two support plates 2 and a plurality of filter plates 3. The filter plates 3 are slidably disposed between the two support plates 2, and the outer side walls of adjacent filter plates 3 are connected by wire rope chains, thereby limiting the maximum stroke of the filter plates 3. The first driving piece 1 is a hydraulic cylinder, the first driving piece 1 is fixedly connected with one of the supporting plates 2, and the first driving piece 1 is used for driving the filter plate 3 to slide relative to the supporting plates 2. The bottom between the two support plates 2 is provided with a liquid collecting tank 7 for collecting filtrate flowing out in the filter pressing process.
The filter press body further comprises a push plate 4, a stop plate 5 and three fixing columns 6, wherein the push plate 4 is fixedly connected with the output end of the first driving piece 1, and the stop plate 5 is fixedly connected with one supporting plate 2 far away from the first driving piece 1. Three fixed columns 6 are arranged between the two support plates 2, two ends of each fixed column 6 are fixedly connected with the two support plates 2 respectively, and the push plate 4 and the filter plate 3 are sleeved outside the fixed columns 6. Three fixed columns 6 support the filter plate 3, and stable movement of the filter plate 3 is guaranteed. Two of the fixing posts 6 penetrate the upper portion of the filter plate 3 and the lower portion of the filter plate 3 adjacent to one side of the filter plate 3, respectively, and the other fixing post 6 penetrates the lower portion of the filter plate 3 adjacent to the other side of the filter plate 3. Such a design facilitates the cleaning unit to enter the space between the two filter plates 3 from the side portions of the filter plates 3, thereby cleaning the filter plates 3.
As shown in fig. 2, the cleaning unit includes a cleaning support 8, a slide plate 9, a second driving member 10, and a plurality of cleaning pipes 11. The two ends of the cleaning support 8 are respectively and fixedly connected with the two support plates 2. The cleaning support 8 comprises a main support 801 and a fixing seat 802, the main support 801 extends along the arrangement direction of the filter plates 3, the extending direction of the fixing seat 802 is perpendicular to the extending direction of the main support 801, a sliding groove 803 is formed in the surface of the fixing seat 802, a through groove 804 penetrating through the fixing seat 802 is formed in the bottom of the sliding groove 803 in a concave mode, the sliding plate 9 can slide along the sliding groove 803, a pipe frame 12 is arranged at the bottom of the sliding plate 9, and the top end of the cleaning pipe 11 is fixedly connected with the bottom of the sliding plate 9 through the pipe frame 12. The slide plate 9 is slidably disposed between both ends of the cleaning support frame 8, and the sliding direction of the slide plate 9 is perpendicular to the sliding direction of the filter plate 3. Four limiting blocks 805 are further arranged on the surface of the fixed seat 802, the limiting blocks 805 are arranged in a pair of opposite directions and are respectively located at two ends of the fixed seat 802, at least part of the limiting blocks 805 are located above the sliding grooves 803, the sliding plate 9 is located between the limiting blocks 805 which are arranged oppositely, and therefore the sliding plate 9 is prevented from being separated from the sliding grooves 803, and sliding stability is improved.
The second driving piece 10 is fixedly connected with the cleaning support 8, and the second driving piece 10 is used for driving the sliding plate 9 to slide relative to the cleaning support 8. The second driving member 10 includes a driving motor 1001 and a gear 1002 fixedly connected to an output end of the driving motor 1001, and teeth are provided on a surface of the sliding plate 9 so as to be engaged with the gear 1002.
The quantity of the cleaning pipes 11 is set according to the quantity of the filter plates 3, if the quantity of the filter plates 3 is N, the quantity of the cleaning pipes 11 is N-1, the cleaning pipes 11 are fixedly arranged at the bottom of the sliding plate 9, and the cleaning pipes 11 are arranged at intervals along the arrangement direction of the filter plates 3. Each cleaning tube 11 is located between two adjacent filter plates 3. The two sides of each cleaning tube 11 are provided with a plurality of spray heads 13 which are arranged at intervals along the extending direction of the cleaning tube 11. The cleaning unit further comprises a water pump and a water inlet pipe, a water inlet channel is arranged in the cleaning pipe 11, the water pump is communicated with the water inlet channel of each cleaning pipe 11 through the water inlet pipe, and each spray head 13 is communicated with the water inlet channel.
During cleaning, the second driving piece 10 drives the sliding plate 9 to reciprocate relative to the cleaning support 8, so that each cleaning pipe 11 reciprocates between two filter plates 3, and a plurality of spray heads 13 on two sides of each cleaning pipe 11 spray water to the filter plates 3 to wash filter residues, thereby cleaning the filter plates 3.
As shown in fig. 3, the monitoring unit includes a fiber grating sensing module 14 and a control module. The fiber bragg grating sensing module 14 is used for monitoring the stress change and the temperature change of the filter plate 3. The control module is respectively and electrically connected with the fiber bragg grating sensing module 14 and the cleaning unit, and is used for judging the blocking condition and the strain damage of the filter plate 3 according to the stress change and the temperature change of the filter plate 3 monitored by the fiber bragg grating sensing module 14, starting the cleaning unit to clean the filter plate 3 when the blocking condition exceeds a first preset threshold value, and giving an alarm when the strain damage exceeds a second preset threshold value.
The fiber bragg grating sensing module 14 comprises a light source, an externally attached fiber bragg grating sensor, a fiber bragg coupler and a fiber bragg grating demodulator, wherein continuous frequency modulation laser signals generated by the light source enter the fiber bragg grating of the externally attached fiber bragg grating sensor through a lead wire, the externally attached fiber bragg grating sensor is uniformly distributed on the outer frame of the filter plate 3 at intervals, and the externally attached fiber bragg grating sensor is sequentially connected with the fiber bragg coupler and the fiber bragg grating demodulator through optical fibers. The external-attached fiber grating sensor is used for monitoring stress change and temperature change of an object to be measured according to wavelength change, and the calculation of the wavelength change adopts the following mathematical expression:
Where ε is strain, p 11、p12 is elasto-optical coefficient, ν is Poisson's ratio, α is linear expansion coefficient of the material, and ΔT is temperature change.
The external-attached fiber grating sensor is of a packaging patch structure, the packaging patch takes a glass fiber reinforced epoxy resin composite material as a substrate, contains fiber gratings and conductive fibers, and is packaged by a vacuum auxiliary pouring liquid resin process to form a firm structure. Specifically, in the embodiment, carbon/phenolic epoxy resin (T300/648) prepreg is selected as a packaging material, and the packaging process flow is that the whole curing device is placed in a temperature control box with the controllable temperature change range of room temperature to 300 ℃, the prepreg is cut into 6 pieces of 40mm multiplied by 15mm sheets according to the directions of fibers and a main shaft of 0 degree, 0 degree and 0 degree respectively, 3 pieces of the 0 degree, 0 degree and 0 degree angles are paved and compacted, the compacted pieces are laid on a negative template, one end of the fiber bragg grating is fused with a section of optical fiber, and the optical fiber is connected to a spectrometer through a thermometer jack of the temperature control box, so that the wavelength change and the shape in the whole manufacturing process are monitored. The outer layer of the fiber grating is sleeved with two sections of plastic protective sleeves, the two sections keep a distance of about 2cm, the bare grating part is paved on the prepreg plate, the fiber 0-degree direction of the fiber grating and the prepreg plate is guaranteed to be strictly consistent, then a layer of compacted prepreg plate is paved on the bare grating, the compacted prepreg plate is paved according to the 0-degree alpha, 0-degree layering sequence, and the whole prepreg layering sequence is paved and compacted according to the 0-degree alpha/0-degree/alpha/0-degree mode. Wherein 0 DEG represents the direction of the principal axis (longitudinal axis) of the prepreg fiber in the same direction as the grating, and alpha represents the included angle between the prepreg carbon fiber and the grating. At this time, two clamps are fixed at two ends of the grating, and stretch the grating. After being paved on the female die for compaction in the mode, the temperature control box begins to be heated to 80-100 ℃ for preheating, and the preheating time is about 30-60 min. And then pressing the prepreg by the male die, and simultaneously pressing and heating to about 120 ℃ for prepressing, wherein the heat preservation time is about 60 minutes. After prepressing, full pressure (3 standard atmospheric pressures) is added, the temperature is raised to about 170 ℃, hot pressing solidification is carried out, the heat preservation time is 60-120 min, demoulding is carried out after natural cooling, the packaged sensor is cut and polished into a sheet shape of 40mm multiplied by 10mm, and then edges are processed.
The control module comprises an intelligent analysis sub-module 15, a blockage analysis feedback sub-module 16, a health early warning sub-module 17 and a display sub-module 18, wherein the intelligent analysis sub-module 15 is used for constructing a mechanical simulation model of the operating filter plate 3 and transmitting analysis data to the blockage analysis feedback sub-module 16 and the health early warning sub-module 17, the blockage analysis feedback sub-module 16 is used for setting a first preset threshold value, loading analysis blockage data and starting a cleaning unit, and the health early warning sub-module 17 is used for setting a second preset threshold value, monitoring strain damage and giving an alarm.
The specific implementation flow of the intelligent cleaning filter press is shown in fig. 4, and the implementation flow comprises the following steps:
Installing a filter press body, a cleaning unit and a part of monitoring unit;
Determining the monitoring position of the filter plate 3, establishing a mechanical simulation model, analyzing by using mechanical simulation software, performing fatigue analysis by combining with software such as FE-SAFE, preSys and the like, determining the layout position and direction of the fiber bragg grating sensor, and establishing a damage fingerprint library of the filter plate 3 by combining experimental data;
Using thermosetting resin such as epoxy resin or unsaturated polyester to adhere the fiber bragg grating sensor to the frame of the filter plate 3, and selecting proper fiber to connect the fiber bragg grating sensor, the light source, the fiber bragg grating demodulator and the fiber bragg coupler;
loading filter plate 3 damage analysis software and a filter plate 3 damage database, debugging communication and data exchange, and connecting a server computer and a fiber grating demodulator to ensure effective communication;
Loading a three-dimensional model of the filter plate 3, and extracting a mapping relation of the mechanical simulation model;
setting a first preset threshold value and a second preset threshold value, and finishing preparation.
Before use, strain test and temperature test can be performed first, the strain test is carried out under the conditions that the optical fiber adopts a single-mode optical fiber for communication, the grating joint adopts a universal optical fiber FC/APC wire jumper, the central wavelength identification and acquisition system adopts an optical fiber Bragg grating demodulator (BGD-4L 20) produced by Wuhan-Mi optical division, the main technical index is that the wavelength resolution is 10-12, the scanning range is 1285-1315 nm, the scanning frequency is 50Hz, and the test result is shown in figure 5. The temperature test condition is that the temperature control equipment uses a WGD-4005 digital display electric heating high-low temperature test box produced by Chongqing Wandao instrument limited company, the temperature fluctuation range is 1 ℃, the temperature control range is-40-150 ℃, the wavelength demodulation simultaneously uses a demodulator and a spectrometer (ANDO AQ-6317B) to read the peak wavelength value, and the spectrometer plays a role in monitoring. The temperature change is raised from 20 ℃ to 60 ℃ and then lowered to 20 ℃ for one cycle. The reflected wavelength value was recorded for each 10 ℃ change in temperature, and the test results are shown in fig. 6. The test results of fig. 5 and 6 are imported into mechanical simulation software, so that the real-time visualization of the strain and the temperature of the filter plate 3 shown in fig. 7 can be realized.
The embodiment of the invention also discloses a cleaning method of the intelligent cleaning filter press, which comprises the following steps:
Constructing a mechanical simulation model of the filter plate 3, analyzing the stress state of the filter plate 3 during operation, finding out stress change sensitive points positioned on the outer frame of the filter plate 3, determining the layout positions and the layout directions of the fiber bragg grating sensing modules 14 according to the stress change sensitive points, collecting material science data and historical working condition data of the filter plate 3, simulating the strain of each part of the filter plate 3 when different types and different parts of damages occur by combining experimental data, and establishing a damage database of the filter plate 3;
The outer-sticking type fiber bragg grating sensor of the fiber bragg grating sensing module 14 is stuck to the layout position of the outer frame of the filter plate 3 by using thermosetting resin;
The intelligent cleaning filter press is operated, the stress change and the temperature change of the filter plate 3 are continuously collected through the fiber grating sensing module 14, so that the blocking condition of the filter plate 3 is judged, and when the blocking condition exceeds a first preset threshold value, a cleaning unit is started to clean the filter plate 3;
And determining a real-time strain field and a temperature field of the filter plate 3 according to the stress change and the temperature change of the filter plate 3, judging the strain damage of the filter plate 3 by combining a filter plate 3 damage database, predicting the residual life of the filter plate 3, and alarming when the strain damage exceeds a second preset threshold.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (6)
1. The intelligent cleaning filter press is characterized by comprising a filter press body, a cleaning unit and a monitoring unit;
The filter press body comprises a first driving piece (1), at least two supporting plates (2) and a plurality of filter plates (3), wherein the filter plates (3) are slidably arranged between the at least two supporting plates (2), the first driving piece (1) is fixedly connected with one of the supporting plates (2), and the first driving piece (1) is used for driving the filter plates (3) to slide relative to the supporting plates (2);
The cleaning unit comprises a cleaning support (8), a sliding plate (9), a second driving piece (10) and a plurality of cleaning pipes (11), wherein two ends of the cleaning support (8) are fixedly connected with at least two supporting plates (2) respectively, the sliding plate (9) is slidably arranged between two ends of the cleaning support (8), the sliding direction of the sliding plate (9) is perpendicular to the sliding direction of the filter plate (3), the second driving piece (10) is fixedly connected with the cleaning support (8), the second driving piece (10) is used for driving the sliding plate (9) to slide relative to the cleaning support (8), a plurality of the cleaning pipes (11) are fixedly arranged at the bottom of the sliding plate (9), a plurality of the cleaning pipes (11) are arranged at intervals along the arrangement direction of the filter plate (3), each cleaning pipe (11) is positioned between two adjacent filter plates (3), two sides of each cleaning pipe (11) are respectively provided with a plurality of spray heads (13) which are arranged at intervals along the extension direction of the cleaning pipes (11), the cleaning support (8) comprises a main support (801) and a fixing seat (802), the main support (801) and the main support (802) are fixedly connected with the cleaning support (8), the main support (802) is provided with the fixing seat (802) along the extension direction, the extension direction of the main support (802) is perpendicular to the extension direction of the main support (802), the cleaning unit further comprises a water pump and a water inlet pipe, a water inlet channel is arranged in the cleaning pipe (11), the water pump is communicated with the water inlet channel of each cleaning pipe (11) through the water inlet pipe, and each spray head (13) is communicated with the water inlet channel;
The monitoring unit comprises a fiber grating sensing module (14) and a control module, wherein the fiber grating sensing module (14) is used for monitoring stress variation and temperature variation of the filter plate (3), the control module is respectively and electrically connected with the fiber grating sensing module (14) and the cleaning unit, the control module is used for judging blocking condition and strain damage of the filter plate (3) according to the stress variation and the temperature variation of the filter plate (3) monitored by the fiber grating sensing module (14), starting the cleaning unit to clean the filter plate (3) when the blocking condition exceeds a first preset threshold value, and alarming when the strain damage exceeds a second preset threshold value, the fiber grating sensing module (14) comprises a light source, an external-mounted fiber grating sensor, a fiber coupler and a fiber grating demodulator, continuous frequency modulation laser signals generated by the light source enter the fiber grating of the external-mounted grating sensor through leads, the external-mounted fiber grating sensor is uniformly distributed on an outer frame of the filter plate (3), the external-mounted fiber grating sensor is sequentially connected with a coupler and a fiber demodulator through the fiber grating demodulator, the control module (16), the fiber grating module (17) and the health analysis module (17) are used for analyzing and analyzing the health sub-model (17) by an analysis sub-module, the blockage analysis feedback sub-module (16) is used for setting a first preset threshold value, loading analysis blockage data and starting a cleaning unit, and the health early-warning sub-module (17) is used for setting a second preset threshold value, monitoring strain damage and giving an alarm;
The external-mounted fiber bragg grating sensor is of an encapsulation patch structure, carbon/phenolic epoxy resin prepreg is selected as an encapsulation material, the prepreg is paved and compacted in sequence according to a mode of 0 degree/alpha/0 degree/alpha/0 degree, wherein 0 degree represents the direction of a main shaft of prepreg fiber in the same direction as the grating, alpha represents an included angle between prepreg carbon fiber and the grating, and the external-mounted fiber bragg grating sensor is adhered to a frame of a filter plate.
2. The intelligent cleaning filter press of claim 1, wherein the filter press body further comprises a push plate (4), a stop plate (5) and a plurality of fixing columns (6), the push plate (4) is fixedly connected with the output end of the first driving piece (1), the stop plate (5) is fixedly connected with one supporting plate (2) far away from the first driving piece (1), the fixing columns (6) are arranged between at least two supporting plates (2), two ends of the fixing columns (6) are respectively fixedly connected with at least two supporting plates (2), and the push plate (4) and the filter plate (3) are sleeved outside the fixing columns (6).
3. An intelligent cleaning filter press according to claim 2, wherein the number of the fixing columns (6) is three, two fixing columns (6) penetrate through the upper part of the filter plate (3) adjacent to one side of the filter plate (3) and the lower part of the filter plate (3), and the other fixing column (6) penetrates through the lower part of the filter plate (3) adjacent to the other side of the filter plate (3).
4. The intelligent cleaning filter press of claim 1, wherein a plurality of limiting blocks (805) are further arranged on the surface of the fixed seat (802), the limiting blocks (805) are oppositely arranged and are respectively located at two ends of the fixed seat (802), at least part of the limiting blocks (805) are located above the sliding groove (803), and the sliding plate (9) is located between the limiting blocks (805) which are oppositely arranged.
5. The intelligent cleaning filter press of claim 1, wherein the external-mounted fiber grating sensor is used for monitoring stress variation and temperature variation of an object to be measured according to wavelength variation, and the wavelength variation is calculated by adopting the following mathematical expression:
,
In the formula, In order to be strained the material is,、Is the coefficient of the elastic light, and the light-emitting element is the light-emitting element,In the form of a poisson's ratio,Is the coefficient of linear expansion of the material,Is a temperature change.
6. A cleaning method of an intelligent cleaning filter press according to any one of claims 1 to 5, characterized in that the method comprises the following steps:
Constructing a mechanical simulation model of the filter plate (3), analyzing the stress state of the filter plate (3) during operation, finding out stress change sensitive points positioned on the outer frame of the filter plate (3), determining the layout positions and the layout directions of the fiber bragg grating sensing modules (14) according to the stress change sensitive points, collecting the material science data and the historical working condition data of the filter plate (3), simulating the strain of each part of the filter plate (3) when different types and different parts of damages occur by combining experimental data, and establishing a damage database of the filter plate (3);
The externally attached fiber bragg grating sensor of the fiber bragg grating sensing module (14) is adhered to the layout position of the outer frame of the filter plate (3) by using thermosetting resin;
Operating the intelligent cleaning filter press, continuously collecting stress changes and temperature changes of the filter plates (3) through the fiber bragg grating sensing module (14), judging the blocking condition of the filter plates (3), and starting the cleaning unit to clean the filter plates (3) when the blocking condition exceeds a first preset threshold value;
According to the stress change and the temperature change of the filter plate (3), determining a real-time strain field and a temperature field of the filter plate (3), judging the strain damage of the filter plate (3) by combining a damage database of the filter plate (3), predicting the residual life of the filter plate (3), and alarming when the strain damage exceeds a second preset threshold.
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