Intelligent cleaning filter press and cleaning method thereof

Abstract

The application 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. The monitoring unit comprises a fiber grating sensing module and a control module. The fiber grating sensing module is used for monitoring stress change and temperature change of filter plates. The control module is electrically connected with the fiber grating sensing module and the cleaning unit. The control module is used for judging the blockage condition and strain damage of the filter plates according to the stress change and temperature change of the filter plates monitored by the fiber grating sensing module, starting the cleaning unit to clean the filter plates when the blockage condition exceeds a first preset threshold, and giving an alarm when the strain damage exceeds a second preset threshold. According to the monitored blockage condition of the filter plates, the filter plates are intelligently cleaned. The cleaning pipe of the cleaning unit can be stably inserted between two adjacent filter plates, the filter plates are cleaned by moving flushing, and the cleaning effect is improved.

Description

Technical Field

[0001] This invention relates to a filter press and its cleaning method, specifically to an intelligent cleaning filter press and its cleaning method, belonging to the field of filter press technology. Background Technology

[0002] In the existing technology, the filter chamber of a filter press is usually composed of two adjacent recessed filter plates. Its main advantage is that it is relatively easy to replace the filter screen or filter cloth, but it has disadvantages such as low filtration efficiency, unsatisfactory effect and easy damage to the filter plates.

[0003] First, after the filter press completes solid-liquid separation, the filter plates are opened, and the filter cake located between the two filter plates can be removed. However, with prolonged use, some filter residue will remain on the filter screens on both sides of the filter plates. If the filter screens become clogged, it will affect the passage of the filtrate, thereby affecting the solid-liquid separation effect. Therefore, after opening the filter plates and removing the filter cake, the filter screens on both sides of the filter plates need to be cleaned in a timely manner. The existing filter presses are not equipped with active cleaning devices, and the step of cleaning the filter screens affects the overall production efficiency of the filter press.

[0004] Secondly, due to the harsh working environment of the filter plates inside the filter press, they are susceptible to damage during service due to the high-speed, high-pressure scouring of the filter media and water flow, as well as uneven pressure on both sides of the filter plates. Failure to replace damaged filter plates in a timely manner can cause further damage to the entire filter press. However, in actual production, it is impossible to monitor the damage status of the filter plates in real time; the identification of damaged filter plates relies solely on the experience of the operators. Summary of the Invention

[0005] Based on the above background, the purpose of this invention is to provide an intelligent cleaning filter press that can reliably monitor the clogging and health status of the filter plates inside the filter press in real time, intelligently clean the filter plates according to the clogging status, and promptly issue an alarm based on the health status of the filter plates.

[0006] Another object of the present invention is to provide a cleaning method for the above-mentioned intelligent cleaning filter press.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0008] A smart cleaning filter press includes a filter press body, a cleaning unit, and a monitoring unit;

[0009] The filter press body includes a first driving member, at least two support plates and a plurality of filter plates. The filter plates are slidably disposed between at least two support plates. The first driving member is fixedly connected to one of the support plates and is used to drive the filter plate to slide relative to the support plate.

[0010] The cleaning unit includes a cleaning bracket, a sliding plate, a second driving component, and several cleaning pipes. The cleaning bracket is fixedly connected to at least two support plates at both ends. The sliding plate is slidably disposed between the two ends of the cleaning bracket, and the sliding direction of the sliding plate is perpendicular to the sliding direction of the filter plates. The second driving component is fixedly connected to the cleaning bracket and is used to drive the sliding plate to slide relative to the cleaning bracket. Several cleaning pipes are fixedly disposed at the bottom of the sliding plate and are spaced apart along the filter plate arrangement direction. Each cleaning pipe is located between two adjacent filter plates. Several nozzles are provided on both sides of the cleaning pipe and are spaced apart along the extension direction of the cleaning pipe.

[0011] The monitoring unit includes a fiber optic grating sensing module and a control module. The fiber optic grating sensing module is used to monitor stress and temperature changes of the filter plate. The control module is electrically connected to the fiber optic grating sensing module and the cleaning unit, respectively. The control module is used to determine the clogging and strain damage of the filter plate based on the stress and temperature changes of the filter plate monitored by the fiber optic grating sensing module, and to start the cleaning unit to clean the filter plate when the clogging exceeds a first preset threshold, and to issue an alarm when the strain damage exceeds a second preset threshold.

[0012] Preferably, the filter press body further includes a push plate, a stop plate, and several fixed columns. The push plate is fixedly connected to the output end of the first driving member, the stop plate is fixedly connected to a support plate away from the first driving member, and several fixed columns are arranged between at least two support plates. The two ends of the fixed columns are respectively fixedly connected to at least two support plates, and the push plate and filter plate are both sleeved on the outside of the fixed columns.

[0013] Preferably, the number of fixing columns is three, with two fixing columns penetrating the upper part and lower part of the filter plate on one side adjacent to the filter plate, respectively, and the other fixing column penetrating the lower part of the filter plate on the other side adjacent to the filter plate.

[0014] Preferably, the cleaning support includes a main support and a fixed base. The main support extends along the filter plate arrangement direction, and the extension direction of the fixed base is perpendicular to the extension direction of the main support. The surface of the fixed base is provided with a sliding groove, and the bottom of the sliding groove is recessed to form a through groove that penetrates the fixed base. The sliding plate can slide along the sliding groove, and the bottom of the sliding plate is provided with a tube frame. The top end of the cleaning pipe is fixedly connected to the bottom of the sliding plate through the tube frame.

[0015] Preferably, the surface of the fixed base is further provided with a plurality of limiting blocks, the limiting blocks being arranged opposite each other and located at both ends of the fixed base, at least some of the limiting blocks being located above the slide groove, and the slide plate being located between the oppositely arranged limiting blocks.

[0016] Preferably, the cleaning unit further includes a water pump and a water inlet pipe. The cleaning pipe is provided with a water inlet channel. The water pump is connected to the water inlet channel of each cleaning pipe through the water inlet pipe, and each nozzle is connected to the water inlet channel.

[0017] Preferably, the fiber Bragg grating sensing module includes a light source, an external fiber Bragg grating sensor, an optical fiber coupler, and a fiber Bragg grating demodulator. The continuously frequency-modulated laser signal generated by the light source enters the fiber Bragg grating of the external fiber Bragg grating sensor through a lead wire. The external fiber Bragg grating sensor is evenly distributed on the outer frame of the filter plate. The external fiber Bragg grating sensor is connected to the optical fiber coupler and the fiber Bragg grating demodulator in sequence through optical fibers.

[0018] Preferably, the externally mounted fiber Bragg grating sensor is used to monitor stress and temperature changes of the measured object based on wavelength changes, and the wavelength changes are calculated using the following mathematical expression:

[0019]

[0020] In the formula, ε is the strain, p 11 p 12 ν is the elastic coefficient, ν is Poisson's ratio, α is the linear expansion coefficient of the material, and ΔT is the temperature change.

[0021] Preferably, the control module includes an intelligent analysis submodule, a blockage analysis feedback submodule, a health warning submodule, and a display submodule. The intelligent analysis submodule is used to construct and run the filter plate mechanical simulation model and transmit the analysis data to the blockage analysis feedback submodule and the health warning submodule. The blockage analysis feedback submodule is used to set a first preset threshold, load and analyze blockage data, and start the cleaning unit. The health warning submodule is used to set a second preset threshold, monitor strain damage, and issue an alarm.

[0022] A cleaning method for the aforementioned intelligent cleaning filter press, the method comprising the following steps:

[0023] A mechanical simulation model of the filter plate was constructed to analyze the stress state of the filter plate during operation, identify the stress-sensitive points on the outer frame of the filter plate, determine the placement and orientation of the fiber optic grating sensing module based on the stress-sensitive points, collect the material science data and historical working condition data of the filter plate, and combine experimental data to simulate the strain of various parts of the filter plate when different types and different parts of damage occur, and establish a filter plate damage database.

[0024] The external fiber Bragg grating sensor of the fiber Bragg grating sensing module is attached to the placement position on the outer frame of the filter plate using thermosetting resin.

[0025] The intelligent cleaning filter press continuously collects stress and temperature changes of the filter plates through a fiber optic grating sensor module to determine the clogging status of the filter plates. When the clogging exceeds the first preset threshold, the cleaning unit is activated to clean the filter plates.

[0026] Based on the stress and temperature changes of the filter plate, the real-time strain field and temperature field of the filter plate are determined. Combined with the filter plate damage database, the strain damage of the filter plate is judged, the remaining life of the filter plate is predicted, and an alarm is triggered when the strain damage exceeds the second preset threshold.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] The present invention provides an intelligent cleaning filter press that intelligently cleans the filter plates based on the monitored filter plate clogging status. The cleaning tube of its cleaning unit can be stably inserted between two adjacent filter plates to perform moving flushing and cleaning of the filter plates, thereby improving the cleaning effect.

[0029] This invention uses an external fiber optic grating sensor, which can be directly attached to existing filter plates without redesigning molds and forming processes. This facilitates the modification of existing filter press products and can be quickly applied to filter plates of different models, specifications and uses, enabling real-time and reliable monitoring of the clogging and health status of filter plates inside the filter press.

[0030] This invention monitors the strain and temperature of the filter plate frame, establishes an overall strain-temperature field, displays it using a model, and provides timely warnings based on the health status, effectively avoiding potential property damage caused by filter plate damage. It also improves the application efficiency of the equipment and has significant economic benefits. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the internal structure of the intelligent cleaning filter press of the present invention;

[0033] Figure 2 This is a partial three-dimensional structural diagram of the intelligent cleaning filter press of the present invention;

[0034] Figure 3 This is a schematic diagram of the monitoring unit in this invention;

[0035] Figure 4 This is a flowchart illustrating the implementation of the intelligent cleaning filter press of the present invention;

[0036] Figure 5 This is a diagram showing the strain test results of the monitoring unit in this invention;

[0037] Figure 6 This is a graph showing the temperature test results of the monitoring unit in this invention;

[0038] Figure 7 This is a real-time visualization of the filter plate in the simulation software in this invention.

[0039] In the diagram: 1. First driving component; 2. Support plate; 3. Filter plate; 4. Push plate; 5. Stop plate; 6. Fixed column; 7. Liquid collection tank; 8. Cleaning bracket; 9. Slide plate; 10. Second driving component; 11. Cleaning pipe; 12. Pipe rack; 13. Nozzle; 14. Fiber optic grating sensing module; 15. Intelligent analysis submodule; 16. Blockage analysis feedback submodule; 17. Health early warning submodule; 18. Display submodule; 801. Main bracket; 802. Fixed seat; 803. Slide groove; 804. Through groove; 805. Limit block; 1001. Drive motor; 1002. Gear. Detailed Implementation

[0040] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of the present invention is not limited to the following embodiments, and any modifications and / or alterations made to the present invention will fall within the protection scope of the present invention.

[0041] In this invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used are commercially available or commonly used in the art. Unless otherwise specified, the methods in the following embodiments are conventional methods in the art. Unless otherwise specified, the components or equipment in the following embodiments are general standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0042] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In this detailed description, numerous specific details are set forth to facilitate explanation and provide a thorough understanding of the embodiments of the present invention. However, one or more embodiments may be practiced by those skilled in the art without these specific details.

[0043] like Figure 1 As shown, an embodiment of the present invention discloses an intelligent cleaning filter press, including a filter press body, a cleaning unit and a monitoring unit. The filter press body is used for solid-liquid separation, the cleaning unit is used for cleaning the filter residue remaining on the filter plate 3, and the monitoring unit is used for monitoring the condition of the filter plate 3 and for control.

[0044] The filter press body includes a first driving component 1, two support plates 2, and multiple filter plates 3. The filter plates 3 are slidably disposed between the two support plates 2, and the outer walls of adjacent filter plates 3 are connected by steel cable chains, thereby limiting the maximum stroke of the filter plates 3. The first driving component 1 is a hydraulic cylinder, and is fixedly connected to one of the support plates 2. The first driving component 1 is used to drive the filter plate 3 to slide relative to the support plate 2. A collection tank 7 is provided at the bottom between the two support plates 2 to collect the filtrate flowing out during the filtration process.

[0045] The filter press body also includes a push plate 4, a stop plate 5, and three fixed columns 6. The push plate 4 is fixedly connected to the output end of the first driving component 1, and the stop plate 5 is fixedly connected to a support plate 2 away from the first driving component 1. The three fixed columns 6 are arranged between the two support plates 2, and both ends of each fixed column 6 are fixedly connected to the two support plates 2 respectively. The push plate 4 and the filter plate 3 are both sleeved on the outside of the fixed columns 6. The three fixed columns 6 support the filter plate 3, ensuring the stable movement of the filter plate 3. Two of the fixed columns 6 penetrate through the upper and lower parts of the filter plate 3 on the side adjacent to the filter plate 3, respectively, while the other fixed column 6 penetrates through the lower part of the filter plate 3 on the other side adjacent to the filter plate 3. This design facilitates the cleaning unit to enter the space between the two filter plates 3 from the side of the filter plate 3, thereby cleaning the filter plate 3.

[0046] like Figure 2 As shown, the cleaning unit includes a cleaning bracket 8, a sliding plate 9, a second driving component 10, and multiple cleaning pipes 11. The cleaning bracket 8 is fixedly connected to two support plates 2 at both ends. The cleaning bracket 8 includes a main bracket 801 and a fixed base 802. The main bracket 801 extends along the arrangement direction of the filter plates 3, and the extension direction of the fixed base 802 is perpendicular to the extension direction of the main bracket 801. The surface of the fixed base 802 is provided with a sliding groove 803, and the bottom of the sliding groove 803 is recessed to form a through groove 804 penetrating the fixed base 802. The sliding plate 9 can slide along the sliding groove 803. A pipe support 12 is provided at the bottom of the sliding plate 9, and the top ends of the cleaning pipes 11 are fixedly connected to the bottom of the sliding plate 9 through the pipe support 12. The sliding plate 9 is slidably disposed between the two ends of the cleaning bracket 8, and the sliding direction of the sliding plate 9 is perpendicular to the sliding direction of the filter plates 3. The surface of the fixed base 802 is also provided with four limiting blocks 805. The limiting blocks 805 are arranged in pairs opposite each other and are located at both ends of the fixed base 802. At least some of the limiting blocks 805 are located above the slide groove 803, and the slide plate 9 is located between the oppositely arranged limiting blocks 805, thereby preventing the slide plate 9 from falling out of the slide groove 803 and improving the sliding stability.

[0047] The second driving component 10 is fixedly connected to the cleaning bracket 8. The second driving component 10 is used to drive the slide plate 9 to slide relative to the cleaning bracket 8. The second driving component 10 includes a drive motor 1001 and a gear 1002 fixedly connected to the output end of the drive motor 1001. The surface of the slide plate 9 is provided with teeth, so that it can mesh with the gear 1002.

[0048] The number of cleaning pipes 11 is set according to the number of filter plates 3. If the number of filter plates 3 is N, then the number of cleaning pipes 11 is N-1. Multiple cleaning pipes 11 are fixedly installed at the bottom of the slide plate 9, and the multiple cleaning pipes 11 are spaced apart along the arrangement direction of the filter plates 3. Each cleaning pipe 11 is located between two adjacent filter plates 3. Multiple nozzles 13 are provided on both sides of each cleaning pipe 11, arranged at intervals along the extension direction of the cleaning pipe 11. The cleaning unit also includes a water pump and a water inlet pipe. A water inlet channel is provided inside the cleaning pipe 11. The water pump is connected to the water inlet channel of each cleaning pipe 11 through the water inlet pipe, and each nozzle 13 is connected to the water inlet channel.

[0049] During cleaning, the second drive unit 10 drives the slide plate 9 to reciprocate relative to the cleaning bracket 8, so that each cleaning pipe 11 reciprocates between the two filter plates 3. Multiple nozzles 13 on both sides of each cleaning pipe 11 spray water onto the filter plate 3 to flush away the filter residue, thereby cleaning the filter plate 3.

[0050] like Figure 3 As shown, the monitoring unit includes a fiber Bragg grating sensing module 14 and a control module. The fiber Bragg grating sensing module 14 is used to monitor stress and temperature changes in the filter plate 3. The control module is electrically connected to both the fiber Bragg grating sensing module 14 and the cleaning unit. The control module is used to determine the clogging and strain damage of the filter plate 3 based on the stress and temperature changes monitored by the fiber Bragg grating sensing module 14, and to start the cleaning unit to clean the filter plate 3 when the clogging exceeds a first preset threshold, and to issue an alarm when the strain damage exceeds a second preset threshold.

[0051] The fiber Bragg grating sensing module 14 includes a light source, an externally mounted fiber Bragg grating sensor, an optical fiber coupler, and a fiber Bragg grating demodulator. The continuously modulated laser signal generated by the light source enters the fiber Bragg grating of the externally mounted fiber Bragg grating sensor through leads. The externally mounted fiber Bragg grating sensors are evenly spaced on the outer frame of the filter plate 3. The externally mounted fiber Bragg grating sensors are sequentially connected to the optical fiber coupler and the fiber Bragg grating demodulator via optical fibers. The externally mounted fiber Bragg grating sensors are used to monitor stress and temperature changes in the measured object based on wavelength changes. The wavelength change is calculated using the following mathematical expression:

[0052]

[0053] In the formula, ε is the strain, p 11 p 12 ν is the elastic coefficient, ν is Poisson's ratio, α is the linear expansion coefficient of the material, and ΔT is the temperature change.

[0054] The externally mounted fiber Bragg grating sensor is an encapsulated patch structure. The encapsulation patch uses glass fiber reinforced epoxy resin composite material as a substrate and contains fiber Bragg gratings and conductive optical fibers. It is encapsulated using a vacuum-assisted liquid resin encapsulation process to form a robust structure. Specifically, in this embodiment, carbon / phenolic polyepoxy resin (T300 / 648) prepreg is selected as the encapsulation material. The encapsulation process is as follows: the entire curing device is placed in a temperature-controlled chamber with a temperature range of room temperature to 300°. The prepreg is cut into six 40mm×15mm sheets according to the fiber and spindle directions of 0°, α, 0°, 0°, α, 0°. The three sheets with 0°, α, 0° angles are laid out and compacted first, and then laid flat on the negative template. Then, a section of optical fiber is fused to one end of the fiber Bragg grating. The fiber is connected to a spectrometer through the thermometer socket of the temperature-controlled chamber to monitor the wavelength changes and shape throughout the manufacturing process. Two plastic protective sleeves are fitted over the outer layer of the fiber grating, with a distance of approximately 2 cm between them. The bare grating portion is then laid on the prepreg board, ensuring that the fiber grating and the fiber 0° direction of the prepreg board are strictly aligned. Another prepreg board, also laid and compacted in the 0°, α, 0° layup sequence, is then laid and compacted in the following order: 0° / α / 0° / 0° / α / 0°. Here, 0° represents the direction of the prepreg board fiber main axis (longitudinal axis) in the same direction as the grating, and α represents the angle between the prepreg carbon fibers and the grating. Two clamps are then fixed at both ends of the grating to tension it. After being laid and compacted in the female mold as described above, the temperature control chamber is preheated to 80–100°C for approximately 30–60 minutes. Next, the male mold is pressed tightly against the prepreg, and pressure and temperature are simultaneously increased to approximately 120°C for pre-compression, which is maintained for approximately 60 minutes. After pre-pressing, apply full pressure (3 standard atmospheres) and heat to about 170℃ for hot pressing and curing. Hold for 60-120 minutes. After natural cooling, demold the sensor, cut and grind it into 40mm×10mm pieces, and then process the edges.

[0055] The control module includes an intelligent analysis submodule 15, a blockage analysis feedback submodule 16, a health warning submodule 17, and a display submodule 18. The intelligent analysis submodule 15 is used to construct and run the mechanical simulation model of the filter plate 3 and transmit the analysis data to the blockage analysis feedback submodule 16 and the health warning submodule 17. The blockage analysis feedback submodule 16 is used to set the first preset threshold, load and analyze the blockage data, and start the cleaning unit. The health warning submodule 17 is used to set the second preset threshold, monitor strain damage, and issue an alarm.

[0056] The specific implementation process of this intelligent cleaning filter press is as follows: Figure 4 As shown, the implementation process includes the following steps:

[0057] Install the filter press body, cleaning unit, and some monitoring units;

[0058] The monitoring points of filter plate 3 were determined and a mechanical simulation model was established. The mechanical simulation software was used for analysis, and fatigue analysis was performed in combination with software such as FE-SAFE and PreSys. The placement and orientation of the fiber optic grating sensor were determined, and a damage fingerprint database of filter plate 3 was established based on experimental data.

[0059] Using thermosetting resins, such as epoxy resin or unsaturated polyester, the fiber Bragg grating sensor is attached to the frame of filter plate 3. Select appropriate optical fibers to connect the fiber Bragg grating sensor, light source, fiber Bragg grating demodulator and fiber coupler.

[0060] Load the filter plate 3 damage analysis software and filter plate 3 damage database, debug communication and data exchange, connect the server computer and fiber optic demodulator to ensure effective communication;

[0061] Load the 3D model of filter plate 3 and extract the mapping relationship of the mechanical simulation model;

[0062] Set the first and second preset thresholds. Preparation complete.

[0063] Before use, strain and temperature tests can be performed. The conditions for strain testing are as follows: the optical fiber is a single-mode communication fiber; the grating connector is a standard fiber optic FC / APC patch cord; and the center wavelength identification and acquisition system uses a fiber optic Bragg grating demodulator (BGD-4L20) manufactured by Wuhan Ligong Optoelectronic Technology Co., Ltd. Its main technical specifications are: wavelength resolution of 10⁻¹², scanning range of 1285–1315 nm, and scanning frequency of 50 Hz. Test results are as follows: Figure 5 As shown. The temperature test conditions were as follows: the temperature control equipment used was a WGD-4005 digital display electric high and low temperature test chamber manufactured by Chongqing Wanda Instrument Co., Ltd., with a temperature fluctuation range of 1℃ and a temperature control range of -40~150℃. Wavelength demodulation was performed using both a demodulator and a spectrometer (ANDO AQ-6317B) to read the peak wavelength values; the spectrometer served as the monitoring instrument. The temperature change was from 20℃ to 60℃, then back to 20℃, constituting one cycle. A reflected wavelength value was recorded for every 10℃ temperature change. The test results are shown below. Figure 6 As shown. Figure 5 and Figure 6 The test results can be imported into mechanical simulation software to achieve, for example... Figure 7 The strain and temperature of filter plate 3 are shown in real time.

[0064] The embodiments of the present invention also disclose a cleaning method for the above-mentioned intelligent cleaning filter press, the method comprising the following steps:

[0065] A mechanical simulation model of filter plate 3 is constructed to analyze the stress state of filter plate 3 during operation, identify the stress change sensitive points on the outer frame of filter plate 3, determine the layout position and direction of fiber optic grating sensing module 14 based on the stress change sensitive points, collect material science data and historical working condition data of filter plate 3, and combine experimental data to simulate the strain of various parts of filter plate 3 when different types and different parts of damage occur, and establish a damage database of filter plate 3.

[0066] The external fiber Bragg grating sensor of the fiber Bragg grating sensing module 14 is attached to the placement position of the outer frame of the filter plate 3 using thermosetting resin.

[0067] The intelligent cleaning filter press is operated. The stress and temperature changes of the filter plate 3 are continuously collected by the fiber optic grating sensor module 14 to determine the clogging status of the filter plate 3. When the clogging status exceeds the first preset threshold, the cleaning unit is started to clean the filter plate 3.

[0068] Based on the stress and temperature changes of filter plate 3, the real-time strain field and temperature field of filter plate 3 are determined. Combined with the damage database of filter plate 3, the strain damage of filter plate 3 is judged, the remaining life of filter plate 3 is predicted, and an alarm is triggered when the strain damage exceeds the second preset threshold.

[0069] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An intelligent cleaning filter press, characterized in that: This intelligent cleaning filter press includes a filter press body, a cleaning unit, and a monitoring unit; The filter press body includes a first driving member (1), at least two support plates (2) and a plurality of filter plates (3). The filter plates (3) are slidably disposed between at least two support plates (2). The first driving member (1) is fixedly connected to one of the support plates (2). The first driving member (1) is used to drive the filter plate (3) to slide relative to the support plate (2). The cleaning unit includes a cleaning bracket (8), a sliding plate (9), a second driving member (10), and several cleaning pipes (11). The cleaning bracket (8) is fixedly connected to at least two support plates (2) at both ends. The sliding plate (9) is slidably disposed between the two ends of the cleaning bracket (8), and the sliding direction of the sliding plate (9) is perpendicular to the sliding direction of the filter plate (3). The second driving member (10) is fixedly connected to the cleaning bracket (8) and is used to drive the sliding plate (9) to slide relative to the cleaning bracket (8). Several cleaning pipes (11) are fixedly disposed at the bottom of the sliding plate (9), and the several cleaning pipes (11) are spaced apart along the arrangement direction of the filter plate (3). Each cleaning pipe (11) is located between two adjacent filter plates (3). Several cleaning pipes (11) are spaced apart along the extension direction of the cleaning pipe (11) on both sides. The cleaning unit includes a series of nozzles (13); the cleaning support (8) includes a main support (801) and a fixed seat (802). The main support (801) extends along the arrangement direction of the filter plates (3). The extension direction of the fixed seat (802) is perpendicular to the extension direction of the main support (801). The surface of the fixed seat (802) is provided with a sliding groove (803). The bottom of the sliding groove (803) is recessed to form a through groove (804) that penetrates the fixed seat (802). The sliding plate (9) can slide along the sliding groove (803). The bottom of the sliding plate (9) is provided with a pipe frame (12). The top of the cleaning pipe (11) is fixedly connected to the bottom of the sliding plate (9) through the pipe frame (12). The cleaning unit also includes a water pump and an inlet pipe. The cleaning pipe (11) is provided with an inlet channel. The water pump is connected to the inlet channel of each cleaning pipe (11) through the inlet pipe. Each nozzle (13) is connected to the inlet channel. The monitoring unit includes a fiber Bragg grating sensing module (14) and a control module. The fiber Bragg grating sensing module (14) is used to monitor the stress and temperature changes of the filter plate (3). The control module is electrically connected to the fiber Bragg grating sensing module (14) and the cleaning unit, respectively. The control module is used to determine the blockage and strain damage of the filter plate (3) based on the stress and temperature changes of the filter plate (3) monitored by the fiber Bragg grating sensing module (14), and to start the cleaning unit to clean the filter plate (3) when the blockage exceeds a first preset threshold, and to issue an alarm when the strain damage exceeds a second preset threshold. The fiber Bragg grating sensing module (14) includes a light source, an external fiber Bragg grating sensor, an optical fiber coupler, and a fiber Bragg grating demodulator. The continuously frequency-modulated laser signal generated by the light source enters the external fiber Bragg grating sensor through a lead wire. The fiber grating of the grating sensor is evenly distributed on the outer frame of the filter plate (3). The external fiber grating sensor is connected to the fiber coupler and the fiber grating demodulator in sequence through optical fiber. The control module includes an intelligent analysis submodule (15), a blockage analysis feedback submodule (16), a health warning submodule (17), and a display submodule (18). The intelligent analysis submodule (15) is used to construct and run the mechanical simulation model of the filter plate (3) and transmit the analysis data to the blockage analysis feedback submodule (16) and the health warning submodule (17). The blockage analysis feedback submodule (16) is used to set the first preset threshold, load the analysis blockage data, and start the cleaning unit. The health warning submodule (17) is used to set the second preset threshold, monitor strain damage, and issue an alarm. The externally mounted fiber optic grating sensor is an encapsulated patch structure, using carbon / phenolic epoxy resin prepreg as the encapsulation material. The prepreg is laid and compacted in the order of 0° / α / 0° / 0° / α / 0°, where 0° represents the direction of the main axis of the prepreg fiber in the same direction as the grating, and α represents the angle between the carbon fiber of the prepreg and the grating. The externally mounted fiber optic grating sensor is attached to the filter plate frame.

2. The intelligent cleaning filter press according to claim 1, characterized in that: The filter press body also includes a push plate (4), a stop plate (5) and several fixed columns (6). The push plate (4) is fixedly connected to the output end of the first drive member (1). The stop plate (5) is fixedly connected to a support plate (2) away from the first drive member (1). Several fixed columns (6) are arranged between at least two support plates (2). The two ends of the fixed columns (6) are fixedly connected to at least two support plates (2) respectively. The push plate (4) and the filter plate (3) are both sleeved on the outside of the fixed columns (6).

3. The intelligent cleaning filter press according to claim 2, characterized in that: The number of fixed columns (6) is three, two of which penetrate the upper part and the lower part of the filter plate (3) on the side adjacent to the filter plate (3) respectively, and the other fixed column (6) penetrates the lower part of the filter plate (3) on the other side adjacent to the filter plate (3).

4. The intelligent cleaning filter press according to claim 1, characterized in that: The surface of the fixed base (802) is also provided with a plurality of limiting blocks (805). The limiting blocks (805) are arranged opposite to each other and are located at both ends of the fixed base (802). At least some of the limiting blocks (805) are located above the slide groove (803), and the slide plate (9) is located between the limiting blocks (805) arranged opposite to each other.

5. The intelligent cleaning filter press according to claim 1, characterized in that: The externally mounted fiber Bragg grating sensor is used to monitor stress and temperature changes in the measured object based on wavelength changes. The wavelength change is calculated using the following mathematical expression: ， In the formula, In response, , The elastic coefficient is 1. Poisson's ratio, is the coefficient of linear expansion of the material. This refers to temperature changes.

6. A cleaning method for an intelligent cleaning filter press according to any one of claims 1-5, characterized in that: The method includes the following steps: Construct a mechanical simulation model of filter plate (3), analyze the stress state of filter plate (3) during operation, find the stress change sensitive points on the outer frame of filter plate (3), determine the layout position and layout direction of fiber optic grating sensing module (14) based on the stress change sensitive points, collect the material science data, historical working condition data of filter plate (3), and combine experimental data to simulate the strain of each part of filter plate (3) when different types and different parts of damage occur, and establish a damage database of filter plate (3); The external fiber grating sensor of the fiber grating sensing module (14) is attached to the placement position of the outer frame of the filter plate (3) using thermosetting resin. The intelligent cleaning filter press is operated. The stress and temperature changes of the filter plate (3) are continuously collected by the fiber optic grating sensor module (14) to determine the clogging status of the filter plate (3). When the clogging status exceeds the first preset threshold, the cleaning unit is started to clean the filter plate (3). Based on the stress and temperature changes of the filter plate (3), the real-time strain field and temperature field of the filter plate (3) are determined. Combined with the filter plate (3) damage database, the strain damage of the filter plate (3) is judged, the remaining life of the filter plate (3) is predicted, and an alarm is triggered when the strain damage exceeds the second preset threshold.

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