Filtering device

Abstract

The invention provides a filtering device which is used for treating ship paint water and comprises a water feeding and discharging system, a main machine system and a vacuum system. The water feeding and discharging system comprises a material storage box, and the material storage box is used for storing ship paint water to be treated; the main machine system comprises a slurry box and a filter plate assembly, the filter plate assembly is arranged in the slurry box, the slurry box communicates with the material storage box, and the filter plate assembly is used for conducting solid-liquid treatment on ship paint water entering the slurry box; the vacuum system communicates with the slurry box and is used for forming a negative pressure environment in the slurry box so as to drive the ship paint water in the slurry box to penetrate through the filter plate assembly multiple times. The invention aims to provide the filtering device which is small in size and convenient to transport.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship paint water treatment, and particularly relates to a filtering device. BACKGROUND

[0002] The in-cabin residue-containing wastewater generated in ship maintenance operations, especially the complex wastewater with high turbidity (0.1-20%), containing fine solid particles (particle size <5 mm) and paint emulsion discharged by the super-high-pressure water rust removal process, is currently mainly transported to centralized wastewater treatment stations for treatment. This mode has significant technical bottlenecks. First, a special pipe network system needs to be constructed for long-distance transportation, which is high in engineering cost and difficult to implement. Second, traditional treatment equipment cannot be adapted to the limited space in the ship cabin due to its large size (usually more than 50 m 3 ) and is difficult to be flexibly deployed at multiple operation points. Third, the existing separation technology has insufficient efficiency in the cooperative removal of complex pollutants, and the treatment flux is generally less than 5 tons / hour, which is difficult to meet the requirements of multiple gun synchronous operation and 24-hour continuous operation. Finally, the key links such as backwashing and residue discharge highly depend on manual intervention, and the lack of intelligence leads to poor operation stability. SUMMARY

[0003] Embodiments of the present application provide a filtering device, which is small in size and convenient to transport.

[0004] Embodiments of the present application provide a filtering device for treating ship paint water, comprising: a water inlet and outlet system comprising a storage tank for storing the ship paint water to be treated; a main system comprising a slurry tank and a filter plate assembly arranged in the slurry tank, the slurry tank being in communication with the storage tank, and the filter plate assembly being used for solid-liquid separation of the ship paint water entering the slurry tank; and a vacuum system in communication with the slurry tank, used for forming a negative pressure environment in the slurry tank to drive the ship paint water in the slurry tank to pass through the filter plate assembly multiple times.

[0005] In some embodiments, the vacuum system comprises: an automatic liquid discharge tank connected with the slurry tank, used for receiving the liquid generated after solid-liquid separation in the slurry tank; and a vacuum pump connected with the automatic liquid discharge tank, used for forming a vacuum negative pressure, and the vacuum negative pressure acting on the slurry tank through the automatic liquid discharge tank.

[0006] In some embodiments, the main system further comprises a distribution head in communication with the slurry tank and the automatic liquid discharge tank, and the distribution head has a first mode and a second mode. In the first mode, the distribution head is used to conduct the vacuum negative pressure generated by the vacuum system to the slurry tank through the automatic liquid discharge tank; In the second mode, the distribution head is used to deliver the liquid in the automatic liquid discharge tank to the slurry tank.

[0007] In some embodiments, the host system further comprises a filter, one end of the filter being connected with the slurry tank, and the other end of the filter being connected with the automatic liquid discharge tank.

[0008] In some embodiments, the filter plate assembly comprises: a plurality of filter plates, which are arranged at intervals in the slurry tank and are used to trap solid impurities in the ship paint water; a plurality of scrapers, at least one scraper being arranged between two adjacent filter plates, and the scraper being used to scrape off the solid impurities trapped on the surface of the filter plate.

[0009] In some embodiments, the host system further comprises a driving mechanism, which is in transmission connection with a plurality of filter plates, and is used to drive the plurality of filter plates to rotate in the slurry tank.

[0010] In some embodiments, the host system further comprises a screw conveyor, which is arranged in the slurry tank and is used to transport the solid impurities scraped off the filter plate by the scraper.

[0011] In some embodiments, the filter device further comprises a cleaning system, which comprises an ultrasonic system arranged in the slurry tank and used to clean the slurry tank and / or the filter plate assembly.

[0012] In some embodiments, the water inlet and outlet system further comprises a stirrer arranged in the storage tank and used to stir the ship paint water to be treated in the storage tank; and / or, The water inlet and outlet system further comprises a pump body, one end of the pump body being connected with the storage tank, and the other end of the pump body being connected with the slurry tank, and the pump body being used to deliver the ship paint water to be treated in the storage tank to the slurry tank.

[0013] In some embodiments, the filter device further comprises a control system, which is electrically connected with the water inlet and outlet system, the host system and the vacuum system.

[0014] The beneficial effects of the embodiments of the present application are: The filtering device has the advantages that the structure is simple and practical, and is suitable for limited installation space of a ship; each system component of the filtering device is selected and connected in a simple and reasonable manner, without complex transmission or control components, so that the overall structure is compact, can be suitable for limited installation space of a deck, a cabin and the like of the ship, and has strong practicability and popularization value by considering the filtering performance and the actual use scene limitation of the ship; the main machine system comprises a slurry tank and a filter plate assembly, the filter plate assembly is arranged in the slurry tank, the slurry tank is communicated with a storage tank, the filter plate assembly is used for solid-liquid separation of ship paint water entering the slurry tank, and the vacuum system is used for forming a negative pressure environment in the slurry tank, so as to drive the ship paint water in the slurry tank to pass through the filter plate assembly multiple times, the problems of low treatment efficiency and incomplete separation of the conventional filtering device for the ship paint water are effectively overcome, directional and efficient treatment of the ship paint water is realized, the environmental protection compliance requirement of the ship paint water treatment in the ship sailing process is met, and the risk of ship pollutant emission is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort based on these drawings.

[0016] Figure 1 The overall structure schematic diagram of the filtering device provided by the present application is shown in the figure. Figure 2 The installation position structure schematic diagram of the screw conveyor of the present application is shown in the figure. Figure 3 The overall structure top view of the filtering device provided by the present application is shown in the figure. Figure 4 The overall left view of the filtering device provided by the present application is shown in the figure.

[0017] Explanation of reference numerals 101, slurry tank; 102, filter plate assembly; 103, scraper; 104, distribution head; 105, driving mechanism; 106, filter; 201, automatic liquid discharge tank; 202, vacuum pump; 301, metering pump; 302, ultrasonic system; 303, dosing barrel; 401, control electric box; 501, stirrer; 502, mechanical pneumatic diaphragm pump; 503, screw conveyor; 504, storage tank; 505, water production tank; 601, main machine frame; 602, overall support frame; 603, equipment base. DETAILED DESCRIPTION

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. In the present invention, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0019] Wastewater containing slag generated during ship repair operations, especially complex wastewater with high turbidity (0.1-20%), containing fine solid particles (<5mm in diameter) and paint emulsions discharged from ultra-high pressure water rust removal processes, currently relies mainly on external transportation to centralized wastewater treatment plants for treatment. This model has significant technical bottlenecks: First, long-distance transportation requires the construction of a dedicated pipeline network system, which is costly and difficult to implement; second, traditional treatment equipment is bulky (usually exceeding 50m). 3 Furthermore, existing separation technologies are not adaptable to the limited space inside ships and are difficult to deploy flexibly at multiple work sites; moreover, the efficiency of existing separation technologies in the synergistic removal of complex pollutants is insufficient, and the processing throughput is generally less than 5 tons / hour, which is difficult to meet the requirements of simultaneous operation of multiple guns and 24-hour continuous operation; finally, key links such as backwashing and slag discharge are highly dependent on manual intervention, and the lack of intelligence leads to poor operational stability.

[0020] Among related technologies, the mainstream technologies in the shipbuilding industry have the following obvious limitations: The first issue is that while marine oil-water separation systems (IMO standard type) can achieve oil content of <15ppm, their gravity sedimentation and adsorption filtration mechanisms have a removal rate of less than 60% for solid impurities (especially <50μm particles), and the system occupies more than 8m² of floor space. 2 It cannot be moved or used. The second is: centrifugal solid-liquid separation devices achieve solid-liquid separation through high-speed rotation of 3000-5000rpm, but the energy consumption is as high as 30kW·h / ton of water, the separation efficiency of oil-sludge mixtures fluctuates between 40-70%, and the equipment weighs more than 8 tons, making it difficult to move. The third point is that although the vacuum filtration system uses 5-20μm precision filter plates to intercept fine particles, the filter plates become clogged every 1-2 hours, requiring 15-20% of the treated water to be used for backwashing, and the continuous operating time is less than 8 hours. The fourth point is that although mobile screening equipment has a processing capacity of 6-8 tons / hour and the advantage of skid mounting, its 1-5mm screen has a removal rate of less than 30% for fine particles (<1mm), and it cannot handle emulsified oil stains, and the screen life is less than 200 hours. The above solutions collectively expose three major technical shortcomings: the single function makes it impossible to simultaneously treat complex pollutants; the low system integration results in key units (separation / filtration / control) being scattered, leading to excessive equipment footprint; and the lack of intelligence causes operating parameters to be fixed, making it unable to adapt to changes in water quality. In particular, problems such as frequent clogging of the vacuum system, high energy consumption of the filtration device, and insufficient precision of the screening equipment severely restrict the treatment efficiency and mobile deployment capability. Therefore, there is an urgent need to improve a composite filtration device and its control method for treating ship paint wastewater in order to solve the above-mentioned problems.

[0021] In view of this, the present invention proposes a filtration device. Figures 1 to 4 This is a schematic diagram of an embodiment of the filtration device provided by the present invention. The filtration device provided by the present invention can solve the problems in related technologies, such as the inability to simultaneously treat complex pollutants due to the single function; low system integration leading to the dispersed arrangement of key units (separation / filtration / control) and excessive equipment footprint; lack of intelligence resulting in fixed operating parameters and inability to adapt to changes in water quality, especially the problems of frequent clogging of the vacuum system, high energy consumption of the filtration device, and insufficient precision of the screening equipment, which seriously restrict the processing efficiency and mobile deployment capability. The filtration device will be described in detail below with reference to the main accompanying drawings.

[0022] Please see Figure 1 This invention provides a filtration device for treating marine paint wastewater. Specifically, the filtration device includes an inlet / outlet system, a main engine system, and a vacuum system. The inlet / outlet system includes a storage tank 504 for storing marine paint wastewater to be treated. The main engine system includes a slurry tank 101 and a filter plate assembly 102. The filter plate assembly 102 is disposed inside the slurry tank 101, which is connected to the storage tank 504. The filter plate assembly 102 is used to solidify and liquidify the marine paint wastewater entering the slurry tank 101. The vacuum system is connected to the slurry tank 101 and is used to create a negative pressure environment inside the slurry tank 101 to force the marine paint wastewater in the slurry tank 101 to pass through the filter plate assembly 102 multiple times.

[0023] In the technical solution of this invention, the filtration device has a simple and practical structure, which is suitable for the limited installation space of ships: the selection and connection of each system component of the filtration device are simple and reasonable, without the need for complex transmission or control components. The overall structure is compact and can be adapted to the limited installation space of ship decks, engine rooms, etc. It takes into account the filtration performance and the actual usage scenario limitations of ships, and has strong practicality and promotion value. The main system includes a slurry tank 101 and a filter plate assembly 102. The filter plate assembly 102 is located in the slurry tank 101. The slurry tank 101 is connected to the storage tank 504. The filter plate assembly 102 is used to solidify and liquidify the ship paint water entering the slurry tank 101. The vacuum system is used to create a negative pressure environment in the slurry tank 101 to drive the ship paint water in the slurry tank 101 to pass through the filter plate assembly 102 multiple times. This effectively overcomes the problems of low efficiency and incomplete separation of conventional filtration devices for ship paint water treatment, realizes the targeted and efficient treatment of ship paint water, meets the environmental compliance requirements for paint water treatment during ship navigation, and reduces the risk of ship pollutant emissions.

[0024] Please continue reading. Figure 1 The filtration device includes an outer frame for supporting and fixing the entire device. The main system is installed on the upper part of the outer frame. From left to right, the outer frame is equipped with a vacuum system, an inlet / drainage system, and a control system. A cleaning system is installed on one side of the outer frame. The main system is used to form a filter cake under vacuum negative pressure, completing solid-liquid separation and filter cake dewatering. The vacuum system is used to drive the filtrate through the filter plate, realizing slurry suction and filter cake drying and dewatering. The cleaning system is used to clean the filter plate through a combination of ultrasonic and acid washing. The control system is used to automatically start and stop the equipment, trigger backwashing according to the pressure difference threshold, perform fault classification alarms, and record operating data. The inlet / drainage system is used for continuous material supply and slag discharge, and the practical processing process is sealed.

[0025] The outer frame includes an integrally molded main frame 601, an overall support frame 602, and an equipment base 603.

[0026] In some embodiments, the slurry tank is welded from stainless steel plate and has an overflow hole inside, which mainly serves to store slurry during slurry suction and dewatering.

[0027] In some embodiments, please refer to Figure 1 and Figure 2Vacuum system 2 is used to drive the filtrate through the filter plate assembly 102, realizing slurry suction and filter cake drying and dewatering. The vacuum system includes an automatic drain tank 201 and a vacuum pump 202. The automatic drain tank 201 is connected to the slurry tank 101 and is used to receive the liquid generated after solid-liquid separation in the slurry tank 101. After solid-liquid separation in the main engine system, the liquid of the ship paint flows out from the slurry tank 101 and is transported to the automatic drain tank 201. The vacuum pump 202 is connected to the automatic drain tank 201 and is used to create a vacuum negative pressure, which acts on the slurry tank 101 through the automatic drain tank 201. The vacuum pump 202 is a single-stage liquid-water ring vacuum pump 202, which does not require separate lubrication. Cooling water must be provided during operation. The rotation direction of the vacuum pump 202 is clockwise (viewed from the direction of the motor).

[0028] In some embodiments, please refer to Figure 1 and Figure 3 The main system also includes a distribution head 104, which is connected to the automatic drain tank 201 of the slurry tank 101. The distribution head 104 has a first mode and a second mode. In the first mode, the distribution head 104 is used to transmit the vacuum negative pressure generated by the vacuum system to the slurry tank 101 via the automatic drain tank 201. In the second mode, the distribution head 104 is used to transport the liquid in the automatic drain tank 201 to the slurry tank 101. The distribution head 104 consists of a stationary disc and a moving disc that rotates with the rotor. It can appropriately adjust the drying zone, vacuum zone, and backwash zone, and adjust the clamping force by adjusting the adjusting bolts.

[0029] In some embodiments, the host system further includes a filter 106, one end of which is connected to the slurry tank 101, and the other end of which is connected to the automatic drain tank 201. Specifically, after the marine paint water in the slurry tank 101 has undergone solid-liquid separation, the separated liquid may still contain fine impurities. At this time, the liquid passes through the filter 106, which filters the liquid again to remove the remaining fine impurities. The filtered liquid can be transferred to the automatic drain tank 201. When the single-number dispensing head 104 is in the second mode, the liquid can be reused for rinsing, thereby saving resources.

[0030] In some embodiments, the filter 106 consists of a pleated deep filter element and a housing. The filter media is a reinforced nylon microporous filter membrane. If the pressure difference is greater than 0.1 MPa or the flow rate drops significantly during filtration, it indicates that the filter 106 is clogged and the filter element should be replaced in time. When replacing the filter element, hold one end of the O-ring and tighten the other end with the four-hole stainless steel fixing plate and screw to avoid twisting the filter element and avoid collisions that could cause damage. Do not allow oil or other dirt to accumulate on the filter element.

[0031] In some embodiments, please refer toFigure 1 and Figure 4 The filter plate assembly 102 includes multiple filter plates and multiple scrapers 103. The filter plates are spaced apart in the slurry tank 101. Each filter plate has multiple densely packed filter holes. When marine paint passes through the filter plate, the liquid flows through the filter holes, while solid impurities remain on the filter plate. The filter plates are used to trap solid impurities in the marine paint. At least one scraper 103 is provided between two adjacent filter plates. The scraper 103 is used to scrape off the solid impurities trapped on the surface of the filter plate. The scraper 103 is composed of a combination of filter and stainless steel materials and serves as a discharge mechanism. The gap between the scraper 103 and the filter plate can be adjusted by bolts; the normal equipment gap adjustment is 0.5mm to 3mm.

[0032] In some embodiments, please refer to Figure 1 and Figure 3 The main system also includes a drive mechanism 105, which is connected to multiple filter plates and drives the multiple filter plates to rotate within the slurry tank 101. The drive mechanism 105 includes a main shaft reducer, which is connected to the rotor via a coupling. It typically uses 90# industrial gear oil or 40# machine oil. For oil filling, simply unscrew the vent cap on the upper part of the machine base. For oil draining, unscrew the drain plug at the lower part of the machine base to drain the dirty oil. The reducer is shipped without internal lubricating oil. After the first 100 hours of operation, the oil should be replaced with new oil and the internal dirty oil should be thoroughly flushed out. Thereafter, the oil should be replaced every four months of continuous operation.

[0033] It should be noted that driving is prohibited while refueling.

[0034] In some embodiments, the main system is used to form a filter cake under vacuum negative pressure to complete solid-liquid separation and filter cake dewatering. The main system includes a slurry tank 101 for storing wastewater to be treated. Inside the slurry tank 101 is a filter plate assembly 102 for intercepting solid particles. A scraper 103 for removing the filter cake is provided on one side of the filter plate assembly 102. A distribution head 104 for switching between vacuum and backwashing zones is fixedly connected to one side of the slurry tank 101. The main shaft of a main shaft reducer is fixedly connected to the middle of the filter plate assembly 102. A filter 106 is fixedly connected to the lower end of the slurry tank 101. The slurry tank 101 is welded from stainless steel plates and has an overflow hole inside, mainly serving to store slurry during suction and dewatering. The main shaft of the main shaft reducer is equipped with a rotor, which is welded from stainless steel and rolled into a cylinder, with both ends supported by shaft heads. On the ball bearing, one end of the shaft is connected to the distribution head 104, and the filter plate is installed on the rotor flange. During operation, the filtrate enters the filter plate assembly 102 through vacuum and then flows to the distribution head 104. During backwashing, water flows through the distribution head 104 to the filter plate assembly 102. The other end of the shaft is connected to the reducer. The rotor rotates under the drive of the motor. The distribution head 104 consists of a stationary disc and a moving disc that rotates with the rotor. It can appropriately adjust the drying zone, vacuum zone, and backwashing zone, and adjust the clamping force by adjusting the bolts. The scraper 103 is composed of a combination of filter and stainless steel materials and plays the role of unloading. The gap between the scraper 103 and the filter plate can be adjusted by bolts. The normal equipment gap adjustment is 0.5~3mm. The main shaft reducer is connected to the rotor through a coupling. Generally, 90# industrial gear oil or 40# machine oil is used. To add oil, simply unscrew the vent cap on the top of the machine base. To drain oil, unscrew the drain plug at the bottom of the machine base. The reducer is shipped without any lubricating oil. After the first 100 hours of operation following the initial oiling, the oil should be replaced with new oil and the internal oil should be thoroughly cleaned. Thereafter, the oil should be replaced every four months of continuous operation.

[0035] Please see Figure 1 and Figure 2 The main system also includes a screw conveyor 503, which is located in the slurry tank 101. The screw conveyor 503 is used to transport solid impurities scraped off the filter plate by the scraper 103. The screw conveyor 503, added to the main system, is directly installed inside the slurry tank 101, accurately receiving and transporting solid impurities scraped off the filter plate by the scraper 103. This eliminates the need for additional complex material transfer pipelines, creating a compact closed loop for the "solid-liquid separation—solid stripping—solid transport" function. The entire device requires no complex transmission or control components, has a compact structure, and can be adapted to the limited installation space of ship decks and engine rooms. It balances filtration performance with the limitations of actual ship usage scenarios, possessing strong practicality and promotional value. In some embodiments, the filtration device further includes a cleaning system for cleaning the filter plates by a combination of ultrasonic and acid washing. The cleaning system includes a metering pump 301 and a dosing tank 303 for chemical cleaning, as well as an ultrasonic system 302 for cleaning. The cleaning system consists of an ultrasonic power supply and an ultrasonic transducer, and mainly uses the cavitation effect of ultrasonic waves to clean the filter plate assembly 102 during the combined cleaning process.

[0036] In some embodiments, the cleaning system includes an ultrasonic system 302 disposed within the slurry tank 101. The ultrasonic system 302 is used to clean the slurry tank 101 and / or the filter plate assembly 102. Ultrasonic cleaning can efficiently remove attached paint residues and stubborn solid deposits, preventing the filtration efficiency from decreasing due to impurity accumulation and extending the service life of the filter plate assembly 102. Furthermore, the cleaning system can perform in-situ cleaning without disassembling the equipment. Combined with the modular design, it further reduces maintenance difficulty and downtime, and improves the continuous operation efficiency of the device.

[0037] It should be noted that the ultrasonic device must not be manually started when the trough is dry or contains slurry! In some embodiments, the inlet and outlet drainage system is used for continuous feeding and slag discharge, and the practical processing is sealed. The inlet and outlet drainage system includes a mixer 501, a mechanical pneumatic diaphragm pump 502 for extracting wastewater, a storage tank 504, and a product water tank 505 for storing clean water.

[0038] Specifically, in some embodiments, a mixer 501 is located inside a storage tank 504. The mixer 501 is used to agitate the marine paint solution to be treated within the storage tank 504. The mixer 501 agitates the marine paint solution to be treated within the storage tank 504, ensuring thorough mixing of liquid and solid impurities, preventing solid impurities from settling to the bottom, and facilitating subsequent separation. The inlet and outlet system also includes a pump body, one end of which is connected to the storage tank 504, and the other end of which is connected to the slurry tank 101. The pump body provides conveying power for the marine paint solution to be treated, stably transporting the marine paint solution to be treated from the storage tank 504 to the slurry tank 101.

[0039] In some embodiments, please refer to Figure 1 and Figure 4 The filtration device also includes a control system, which is electrically connected to the inlet / outlet system, the main unit system, and the vacuum system. The control system is used for automatically starting and stopping the equipment, triggering backwashing based on differential pressure thresholds, performing fault-based alarms, and recording operating data. The control system includes a control box 401, which is used for automatically starting and stopping the equipment, triggering backwashing based on differential pressure thresholds, performing fault-based alarms, and recording operating data.

[0040] The filtration device also includes a water system, which consists of a pressure reducing valve, a filter 106, an acid inlet, and stainless steel pipes, and flushes the filter plate assembly 102 from the inside out for each cycle.

[0041] The filtration device also includes an electrical control system, which includes a high-voltage system consisting of switch contactors, thermal relays, circuit breakers, time relays, frequency converters, etc., used to drive equipment such as motors; The electrical control system also includes a low-voltage system, which consists of a programmable logic controller or computer and a data acquisition interface. It controls the normal operation of the equipment by continuously collecting the working status of the filter.

[0042] The operation of the filtration device provided in this application is as follows: Step 1: Pre-start comprehensive inspection: Check whether all equipment components and installation foundation are loose; check whether the main shaft reducer and transmission mechanism need lubrication; confirm that vacuum pump 202 and mechanical pneumatic diaphragm pump 502 must not reverse; check whether the power supply is normal, whether the tap water pressure reaches 0.4MPa, and whether the air source pressure is not lower than 0.4MPa; confirm that a small amount of water flows out after the water seal switch of vacuum pump 202 is opened; adjust the gap of scraper 103 to the range of 0.5~3mm; check whether there are abnormal noises in each transmission component; confirm that the water quality meets the requirements; check whether each valve opens and closes normally. Step 2: Single-component test run verification: Start the rotor and run it idle, adjust the speed and check for any abnormal noise; verify that the 504 agitator in the storage tank can agitate normally; start the vacuum pump 202 and run it idle, check whether the vacuum level meets the standard and whether there is any abnormal noise; start each pneumatic valve one by one and check whether it is in place; fill the tank with water until the ultrasonic transducer is submerged, start the ultrasonic system 302 and check whether each ultrasonic power supply is overheating or making abnormal noise; start the acid pump, use 40%-50% nitric acid to supply the solution, adjust the acid parameters, and determine the cleaning time by on-site test; Step 3: Automatic Start-up of the Machine: After completing all checks, press the start button on the control box 401. The equipment will enter the automatic start-up state. The control system will automatically start the agitator in the storage tank 504, the main shaft reducer, the vacuum pump 202 and related actuators according to the preset program instructions to start the filtration work. At this time, the backwash water pressure should be controlled between 0.08 and 0.15 MPa, and the vacuum degree should be maintained between -0.08 and -0.098 MPa. Step 4: Continuous Filtration and Online Monitoring: The filter plate assembly 102 rotates continuously under vacuum negative pressure, sequentially completing the slurry suction, drying, and scraping operations; the control system monitors the pressure difference of the filter plate in real time. When the pressure difference exceeds the threshold or the flow rate drops significantly, the control system automatically triggers the backwashing program; the backwash water enters the filter plate through the distribution head 104, flushing the micropores from the inside out, washing away the clogging particles, and completing the regeneration of the filter plate; Step 5: Automatic drainage adjustment: Based on the slurry concentration and changes in the liquid level tube, set the opening and closing times of the automatic drainage tank 201 on the touch screen manual interface to achieve automatic drainage control of the filtrate. Step 6: Periodic joint cleaning trigger: After the equipment has been running continuously for 8-12 hours, in order to ensure that the micropores of the filter plate are unobstructed, a deep cleaning is required. The operator presses the automatic cleaning button and the program automatically completes the joint cleaning function. During cleaning, personal protective equipment must be worn and the tank must be filled with water until the ultrasonic device is completely immersed in the water surface. Step 7: Combined cleaning execution: The cleaning system starts the ultrasonic device and metering pump 301301, injects 40%-50% nitric acid prepared in the dosing tank 303303, and performs ultrasonic + chemical combined cleaning for 45 to 60 minutes to completely remove the attached solid matter that could not be backwashed from the filter media; the combined cleaning is only automatically triggered when there is water in the tank, and it is strictly forbidden to start it manually when there is no water. Step 8: Cleaning completion and resumption of operation: After cleaning is completed, press the stop cleaning button. The automatic cleaning process will end, and the system will return to normal filtration status to ensure high filtration efficiency when restarting. Step 9: Normal shutdown: When it is necessary to stop the machine, press the stop button once. The stopping process takes about two minutes. After the rotor stops rotating completely, the machine is stopped. When stopping in winter, all the water in the pipeline system should be drained and the water in the filter plate assembly 102 should be drained to prevent the pipes, filter plates and other accessories from freezing. Step 10: Emergency Stop and Manual Intervention: In case of filter plate damage or other emergency, immediately press the stop button or directly cut off the power. The machine can be restarted only after the fault has been resolved. If you need to operate each drive device individually, click "Manual" on the touch screen home screen to enter the manual interface. This operation is not recommended when starting or cleaning automatically.

[0043] Step 11: Filter Cartridge Maintenance and Replacement: When the pressure difference before and after water filter 106 is greater than 0.1MPa or the flow rate drops significantly, it indicates that filter 106 is clogged and the filter cartridge should be replaced in time. When replacing the filter cartridge, hold one end of the O-ring and tighten the other end with the four-hole stainless steel fixing plate and screw to avoid twisting the filter cartridge. Also, the filter cartridge should not be contaminated with oil or other dirt.

[0044] Analysis of related technical defects: 1. The cause-and-effect chain of low treatment efficiency due to space constraints: Traditional wastewater treatment equipment adopts a decentralized layout (filter units, storage tanks, and control cabinets are independently distributed) → equipment footprint > 15m² 2 Furthermore, the height is greater than 5m, making it impossible to deploy in the limited space of a ship's cargo deck, thus forcing reliance on long-distance pipelines to transport wastewater. 2. Cause-and-effect chain of process defects leading to operation interruption: Existing technology relies on a single filtration mechanism (such as mechanical screening or vacuum adsorption) → the micropores of the filter plate are quickly blocked by fine particles (<5mm) → frequent shutdowns for backwashing are required → the effective operating time is too short in 24-hour continuous operation; 3. Inadequate waste collection increases the risk of secondary pollution. Cause-and-effect chain: Traditional equipment adopts an open slag discharge design → slag discharged from the equipment is scattered on the deck inside the cabin → manual cleaning and transportation to the hazardous waste warehouse are required.

[0045] Based on the above analysis, a causal correspondence between the objective and the technical effect of this invention can be derived:

[0046] This invention is the first to integrate a roller filtration system, a vacuum separation unit, and an ultrasonic cleaning device into a single skid-mounted body, enabling rapid lifting and deployment of the entire machine through standardized lifting interfaces or forklift ports, completely replacing the traditional distributed equipment layout. The five-stage synergistic treatment process is as follows: slurry suction (vacuum adsorption of solid-liquid mixture) → drying (negative pressure dehydration and solidification of filter cake) → scraping (mechanical scraping of solid residue) → backwashing (reverse rinsing of filter plates with filtrate) → combined cleaning (30kHz ultrasonic + acid washing to regenerate filter plates). This process chain solves the technical bottlenecks of traditional equipment, such as rapid filter plate clogging and high frequency of manual intervention. Intelligent closed-loop control system: PLC dynamic control system based on multi-sensor feedback of liquid level and differential pressure: automatically starts and stops inlet and outlet air control valves, triggers backwashing and combined cleaning according to preset cycle, and performs fault-level alarm (pause / emergency stop) and records it to touch screen; Modular rapid maintenance architecture: Locking pipe connectors (pressure ≥1.6MPa) enable pipe disassembly and assembly in seconds; independent functional units (roller / vacuum pump / ultrasonic generator) support separate replacement; screw conveyor and ton bag collection are modularly integrated to achieve zero-landing transfer of waste.

[0047] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0048] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes that element.

[0049] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A filtration device, characterized in that, The filtration device is used to treat marine paint wastewater, and includes: The water inlet and outlet system includes a storage tank (504) for storing the marine paint solution to be treated; The main system includes a slurry tank (101) and a filter plate assembly (102), the filter plate assembly (102) being disposed within the slurry tank (101), the slurry tank (101) being connected to the storage tank (504), and the filter plate assembly (102) being used for solid-liquid treatment of the marine paint solution entering the slurry tank (101); and, A vacuum system, connected to the slurry tank (101), is used to create a negative pressure environment within the slurry tank (101) to force the marine paint solution within the slurry tank (101) to pass through the filter plate assembly (102) multiple times.

2. The filtration device according to claim 1, characterized in that, The vacuum system includes: An automatic drain tank (201), connected to the slurry tank (101), is used to receive the liquid generated after solid-liquid separation in the slurry tank (101); and, A vacuum pump (202) is connected to the automatic drain tank (201). The vacuum pump (202) is used to generate a vacuum negative pressure, which is applied to the slurry tank (101) via the automatic drain tank (201).

3. The filtration device according to claim 2, characterized in that, The host system also includes a distribution head (104) that is connected to the slurry tank (101) and the automatic drain tank (201). The distribution head (104) has a first mode and a second mode. In the first mode, the dispensing head (104) is used to transmit the vacuum negative pressure generated by the vacuum system to the slurry tank (101) via the automatic drain tank (201). In the second mode, the dispensing head (104) is used to deliver the liquid in the automatic drain tank (201) to the slurry tank (101).

4. The filtration device according to claim 2, characterized in that, The host system also includes a filter (106), one end of which is connected to the slurry tank (101), and the other end of which is connected to the automatic drain tank (201).

5. The filtration device according to any one of claims 1-4, characterized in that, The filter plate assembly (102) includes: Multiple filter plates are spaced apart in the slurry tank (101), and the filter plates are used to trap solid impurities in the ship paint water; Multiple scrapers (103) are provided, with at least one scraper (103) between two adjacent filter plates, the scraper (103) being used to scrape away the solid impurities trapped on the surface of the filter plate.

6. The filtration device according to claim 5, characterized in that, The host system also includes a drive mechanism (105), which is connected to the plurality of filter plates in a transmission manner. The drive mechanism (105) is used to drive the plurality of filter plates to rotate within the slurry tank (101).

7. The filtration device according to claim 5, characterized in that, The main system also includes a screw conveyor (503), which is located in the slurry tank (101) and is used to transport the solid impurities scraped off the filter plate by the scraper (103).

8. The filtration device according to any one of claims 1-4, characterized in that, It also includes a cleaning system, which includes an ultrasonic system (302) located inside the slurry tank (101) and is used to clean the slurry tank (101) and / or the filter plate assembly (102).

9. The filtration device according to any one of claims 1-4, characterized in that, The water inlet and outlet system further includes a mixer (501), which is located inside the storage tank (504). The mixer (501) is used to mix the marine paint solution to be treated in the storage tank (504); and / or, The water inlet and outlet system also includes a pump body, one end of which is connected to the storage tank (504) and the other end of which is connected to the slurry tank (101). The pump body is used to transfer the marine paint water to be treated in the storage tank (504) to the slurry tank (101).

10. The filtration device according to any one of claims 1-4, characterized in that, It also includes a control system, which is electrically connected to the inlet / outlet system, the main unit system, and the vacuum system.

Images