Circulating water microfiltration equipment and cleaning method thereof

Abstract

The invention belongs to the technical field of aquaculture equipment, and particularly relates to circulating water microfiltration equipment and a cleaning method thereof. Circulating water microfiltration equipment comprises a first shell, a filtering assembly, a cleaning assembly and a dirt collecting assembly. The filtering assembly is used for filtering tail water. The cleaning assembly comprises a water inlet pipe and a cleaning pipeline, the cleaning pipeline is provided with a plurality of cleaning nozzles, and the plurality of cleaning nozzles are all aligned with the filter vat and can perform back-flushing operation on the filter vat. The dirt collecting assembly comprises a dirt collecting frame, a scraping plate and a dirt collecting box. The dirt collecting frame is used for collecting impurities on the filtering barrel flushed by the cleaning assembly, and the dirt collecting box is located below the dirt collecting frame and used for collecting the impurities scraped by the scraping plate. Therefore, the filter barrel can be quickly and effectively cleaned, the filter barrel cannot be blocked, and the technical problems that in the prior art, a filter screen is blocked due to long-term operation of a microfilter, and the filter screen is not easy to clean in the prior art are effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of aquaculture equipment, and in particular relates to circulating water microfiltration equipment and a cleaning method thereof. Background Art

[0002] Aquaculture is a production activity that uses water resources to artificially raise aquatic animals. It has the advantages of high efficiency, resource conservation, and environmental protection. In order to improve the output and quality of aquaculture, it is necessary to recycle and treat the aquaculture water to keep the water quality stable and suitable. Among them, the rotary drum microfilter is a commonly used aquaculture water treatment equipment. It uses a rotating filter to separate the solid particles in the aquaculture water, thereby reducing the content of suspended matter and organic matter in the water and improving the transparency and redox potential of the water.

[0003] Then, the average density of particles in the tail water of circulating aquaculture is about 1.05g / cm 3 ~1.19g / cm 3 , which is close to the density of water, among which particles smaller than 30μm account for 80% to 90% of TSS (total suspended particles) in water. Therefore, when the microfilter is running for a long time, the sticky substances in the aquaculture water gradually adhere to the filter screen, causing the filter holes to be easily blocked. The blocked filter screen will greatly reduce the filtering capacity of the microfilter. In addition, the existing microfilter screen is not easy to clean, and it usually takes 2-3 weeks to replace the filter screen, which greatly increases the maintenance cost of the entire equipment. Summary of the invention

[0004] In order to solve the technical problem in the prior art that the filter screen of a microfiltration machine is easily clogged and difficult to clean after long-term operation, the present invention provides a circulating water microfiltration device and a cleaning method thereof.

[0005] The present invention is implemented by the following technical scheme: a circulating water microfiltration device, which comprises a shell one, a filter assembly, a cleaning assembly and a dirt collecting assembly, wherein a cylindrical barrel is fixedly installed in the shell one, and the filter assembly is used to filter tail water in an aquaculture process; the filter assembly comprises a driving member, a filter barrel and a collecting barrel, wherein the collecting barrel is installed at the bottom of the shell one, a collecting tank is provided in the collecting barrel, the filter barrel is transversely arranged in the collecting tank, one end of the filter barrel is rotatably connected to the cylindrical barrel, and the other end of the filter barrel passes through the shell one and is connected to the driving member; the tail water to be filtered enters the filter barrel, and a plurality of filter holes are evenly opened on the barrel wall of the filter barrel, the driving member drives the filter barrel to rotate, impurities in the tail water remain in the filter barrel, and the filtered tail water flows into the collecting tank through the filter holes; the cleaning assembly is installed on the shell one and is located above the filter barrel, and the cleaning assembly comprises a water inlet pipe and a cleaning pipe, wherein a plurality of cleaning nozzles are arranged on the cleaning pipe, and the plurality of cleaning nozzles are all aimed at the filter barrel; the sewage collecting assembly comprises a sewage collecting frame, a scraper and a sewage collecting box, one end of the sewage collecting frame is fixed to the inner wall of the cylindrical barrel, and the other end of the sewage collecting frame extends into the filter barrel, and the sewage collecting frame extending into the filter barrel is located directly below the cleaning pipe; the sewage collecting frame is used to collect impurities on the filter barrel flushed by the cleaning assembly; a plurality of through holes are evenly opened on the sewage collecting frame, and the aperture of the through holes is less than or equal to the aperture of the filter hole, and the water entering the sewage collecting frame enters the filter barrel again through the through holes; the sewage collecting box is slidably mounted on the cylindrical barrel, the sewage collecting box is located below the sewage collecting frame, and one end of the sewage collecting box close to the sewage collecting frame extends into the filter barrel to the bottom of the sewage collecting frame; the scraper is mounted in the sewage collecting frame, and the scraper is used to scrape the impurities in the sewage collecting frame into the sewage collecting box.

[0006] As a further improvement of the present invention, two brushes are provided on the dirt collecting frame, and the two brushes are symmetrically installed on the dirt collecting frame, and one end of the brush away from the dirt collecting frame contacts the inner wall of the filter barrel.

[0007] As a further improvement of the present invention, the brush includes a mounting block and a brush body. The mounting block is plugged into the side wall of the dirt collecting frame, and the brush body is fixedly mounted on the mounting block. The brush body is an arc-shaped structure, and the brush body is attached to the surface of the inner wall of the filter barrel.

[0008] As a further improvement of the present invention, the cross-section of the collecting barrel is a semicircular structure, and a plurality of groups of ultrasonic transducers are installed on the outer wall of the collecting barrel at intervals along the axial direction, and each group of the ultrasonic transducers is distributed circumferentially on the outer wall of the collecting barrel. The ultrasonic transducers are used to generate ultrasonic waves, and the particles adhering to the filter barrel are caused to fall off from the inner wall of the filter barrel through the ultrasonic waves.

[0009] As a further improvement of the present invention, the circulating water microfiltration equipment also includes a water pump, which is installed on the outside of the shell one, one end of the water pump is connected to the collection barrel, and the other end of the water pump is connected to the water inlet pipe. The water filtered by the collection barrel is transported to the cleaning nozzle through the water pump, and the cleaning nozzle is used to backwash impurities on the inner wall of the filter barrel.

[0010] As a further improvement of the present invention, a sewage outlet is provided on a side wall of the sewage collecting frame close to the sewage collecting box, and the scraper scrapes off impurities in the sewage collecting frame and transports them into the sewage collecting box through the sewage outlet.

[0011] As a further improvement of the present invention, the dirt collecting frame is provided with an opening, the opening faces the cleaning pipe, and the area of ​​the opening covers the spraying areas of all cleaning nozzles on the cleaning pipe.

[0012] As a further improvement of the present invention, the cleaning pipe is an arc-shaped structure, and the center of the arc-shaped cleaning pipe coincides with the center of the filter barrel.

[0013] As a further improvement of the present invention, the cleaning assembly also includes two rubber baffles, which are symmetrically arranged on both sides of the cleaning pipe; one end of the rubber baffle is fixed to the cleaning pipe, and the other end of the rubber baffle extends in the radial direction of the filter barrel until it contacts the outer wall of the filter barrel.

[0014] As a further improvement of the present invention, a plurality of ultraviolet lamps are installed on the inner wall of the shell one, and the plurality of ultraviolet lamps are distributed along the axial direction of the filter barrel, and the ultraviolet lamps are used to sterilize bacteria in the filter barrel.

[0015] The present invention also includes a method for cleaning a circulating water microfiltration device, which includes the following steps: S1, starting an ultrasonic transducer and an ultraviolet lamp in the circulating water microfiltration device, wherein the ultrasonic wave generated by the ultrasonic transducer can cavitate, accelerate and directly flow the impurity particles adhering to the filter barrel, so that the impurity particles are dispersed and emulsified; the ultraviolet rays generated by the ultraviolet lamp can sterilize the bacteria on the filter barrel;

[0016] S2, after the ultrasonic transducer and the ultraviolet lamp have been working for 5-10 minutes, the cleaning assembly and the driving member are started at the same time, the driving member drives the filter barrel to rotate, the brush on the dirt collecting frame scrapes off the impurity particles on the inner wall of the filter barrel, and the cleaning nozzle can rinse the impurity particles adhering to the filter barrel, so that the impurity particles on the filter barrel fall into the dirt collecting frame, and the cleaned water enters the collection barrel through the through hole on the dirt collecting frame and the filter hole on the filter barrel;

[0017] S3, during the process of the cleaning component cleaning the circulating water microfiltration device, the scraper will regularly scrape the foreign particles accumulated on the dirt collection frame into the dirt collection box, and the scraper scrapes once every 5-8 minutes;

[0018] S4, after the cleaning is completed, the ultrasonic transducer, the ultraviolet lamp and the cleaning component are turned off respectively, thereby ending the cleaning operation.

[0019] The technical solution provided by the present invention has the following beneficial effects:

[0020] (1) The circulating water microfiltration equipment of the present invention is provided with a cleaning component and a dirt collecting component. The cleaning component can backwash the filter barrel, and the dirt collecting component can collect the impurity particles after the cleaning component is cleaned, so as to realize fast and effective cleaning of the filter barrel, so that the filter barrel will not be blocked, and effectively solve the technical problems in the prior art that the filter screen is blocked due to the long-term operation of the microfiltration machine and the prior art is not good at cleaning the filter screen. At the same time, the impurity particles in the filter barrel can be discharged in time through the dirt collecting box, so that the cleaning process can be carried out continuously. In addition, the circulating water microfiltration equipment of the present invention also includes a collecting barrel, which can uniformly collect the cleaned water during the cleaning process, and the water entering the collecting barrel is also filtered by the filter barrel. In this scheme, the collected water can be circulated to the cleaning component, so that the cleaning component can recycle the water in the cleaning process, thereby saving water resources in the cleaning process and improving the utilization rate of water resources.

[0021] (2) When the circulating water microfiltration equipment of the present invention is being cleaned, the ultrasonic transducer can use ultrasonic waves to disperse and emulsify the impurity particles adhering to the filter barrel, thereby reducing the adhesion between the impurity particles and the filter barrel. The filter barrel is driven to rotate slowly by a driving member. During the rotation, the rubber baffle and the brush body can simultaneously scrape off the impurity particles adhering to the outside and inside of the filter barrel. Through the coordinated cooperation of the ultrasonic transducer, the rubber baffle, and the brush body, the impurity particles can be quickly peeled off from the filter barrel, and then through the backwashing of the cleaning nozzle, the impurity particles adhering to the filter barrel can be quickly separated from the filter barrel and fall into the dirt collecting frame. Through the joint cooperation of the above-mentioned components, the filter barrel can be cleaned quickly, with a fast cleaning speed and high cleaning efficiency. At the same time, the water resources consumed during the cleaning process can be reduced, thereby saving water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional diagram of the circulating water microfiltration equipment provided in Example 1 of the present invention.

[0023] Figure 2 This is a schematic diagram of the internal structure of the circulating water microfiltration equipment provided in Example 1 of the present invention.

[0024] Figure 3 This is a top view of the circulating water microfiltration equipment provided in Example 1 of the present invention.

[0025] Figure 4 For the present invention Figure 3 Enlarged view of the cross section along AA.

[0026] Figure 5 For the present invention Figure 3 Enlarged view of the cross section along BB.

[0027] Figure 6 For the present invention Figure 3 Enlarged cross-section along BB (not all filter holes are shown).

[0028] Figure 7 For the present invention Figure 5 Enlarged schematic diagram of point C in the middle.

[0029] Figure 8 For the present invention Figure 5 Enlarged schematic diagram of point D in the middle.

[0030] Markings in the figure are: 1. Shell 1; 11. Cylindrical tube; 12. Ultraviolet lamp; 21. Driving part; 22. Filter barrel; 221. Filter hole; 23. Collecting barrel; 231. Collecting trough; 232. Ultrasonic transducer; 31. Water inlet pipe; 32. Cleaning pipe; 321. Cleaning nozzle; 33. Rubber baffle; 41. Dirt collecting frame; 411. Through hole; 412. Brush; 414. Drain outlet; 42. Scraper; 43. Dirt collecting box. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0032] In the description of the present invention, it should be noted that for directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions and positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention. The terms "first", "second", etc. in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. The terms "including" and "having" in the specification and claims of the present invention and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device including a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] Example 1

[0034] This embodiment provides a circulating water microfiltration device, please refer to Figure 1 and Figure 2, which includes a shell 1, a filter assembly, a cleaning assembly and a dirt collection assembly. The filter assembly, the cleaning assembly and the dirt collection assembly are all installed in the shell 1. A cylindrical barrel 11 is installed in the shell 1, and a hole groove is provided on the side wall of the shell on which the cylindrical barrel 11 is installed, and the aperture of the hole groove is the same as the inner diameter of the cylindrical barrel 11. The filter assembly is used to filter the tail water in the aquaculture process. The filter assembly includes a driving member 21, a filter barrel 22 and a collecting barrel 23. The collecting barrel 23 is installed at the bottom of the shell 1. The collecting barrel 23 is provided with a collecting groove 231. The filter barrel 22 is horizontally arranged in the collecting groove 231. The collecting groove 231 is used to collect the tail water filtered by the filter barrel 22. One end of the filter barrel 22 can be connected to the cylindrical barrel 11 through a bearing, and the other end of the filter barrel 22 passes through the shell 1 and is connected to the driving member 21. The driving member 21 can drive the filter barrel 22 to rotate. A plurality of filter holes 221 are evenly provided on the barrel wall of the filter barrel 22, and the tail water and impurities in the filter barrel 22 are separated by the filter holes 221. The impurities in the tail water are intercepted by the filter holes 221 and remain in the filter barrel 22. The filtered tail water enters the collection barrel 23 through the filter holes 221, and the collection barrel 23 can collect the filtered tail water. In this embodiment, when the filter barrel 22 filters the tail water, the tail water can be transported to the filter barrel 22 through the hole groove and the cylindrical barrel 11. The purpose of transporting the tail water through the hole groove and the cylindrical barrel 11 is that the pipeline for transporting the tail water will not interfere with the rotation of the filter barrel 22. After the tail water enters the filter barrel 22, the tail water entering the filter barrel 22 due to gravity is located at the bottom of the filter barrel 22, and the filter barrel 22 is able to filter the incoming tail water. At the same time, the driving member 21 is started, and the driving member 21 drives the filter barrel 22 to rotate. Under the action of centrifugal force, the separation speed of tail water and impurities in the filter barrel 22 can be accelerated, thereby improving the filtering efficiency. It can be understood that in this embodiment, the rotation speed of the filter barrel 22 during the filtering process can be 20-25rpm. At this rotation speed, it can not only achieve the acceleration of the solid-liquid separation of the tail water in the filter barrel 22, but also avoid the filtered water flying out of the collection barrel 23 due to excessive rotation speed.

[0035] In this embodiment, the projected area of ​​the collecting barrel 23 at the bottom of the shell 1 is larger than the projected area of ​​the filtering barrel 22 at the shell 1 , so that the collecting barrel 23 can collect all the tail water filtered in the filtering barrel 22 .

[0036] Please refer to Figure 3 to Figure 4The cross section of the collecting barrel 23 may be a semicircular structure, and the radius of the collecting barrel 23 is much larger than the radius of the filtering barrel 22, so that there are many gaps between the filtering barrel 22 and the collecting barrel 23, and the gaps can be used to collect the tail water filtered by the filtering barrel 22. In actual use, if the water filtered by the filtering barrel 22 splashes outside the collecting barrel 23 due to the excessive rotation speed of the filtering barrel 22, a baffle may be installed on the shell of the collecting barrel 23, and the baffle is used to block the tail water filtered out of the rotating filtering barrel 22, so that the tail water filtered in the filtering barrel 22 can all enter the collecting barrel 23.

[0037] Please refer to Figures 4 to 6, the cleaning component is installed on the inner wall of the shell 1 and is located above the filter barrel 22. The cleaning component is used to backwash the foreign particles adhering to the filter barrel 22 so that these foreign particles will not block the filter holes 221. The cleaning component includes a water inlet pipe 31 and a cleaning pipe 32, and a plurality of cleaning nozzles 321 are provided on the cleaning pipe 32, and the plurality of cleaning nozzles 321 are all aimed at the filter barrel 22. The dirt collecting component includes a dirt collecting frame 41, a scraper 42 and a dirt collecting box 43. One end of the dirt collecting frame 41 is fixed to the inner wall of the cylindrical barrel 11, and the other end of the dirt collecting frame 41 extends into the filter barrel 22, and the dirt collecting frame 41 extending into the filter barrel 22 is located directly below the cleaning component. The dirt collecting frame 41 is provided with an opening, the opening faces the cleaning pipe 32, and the area of ​​the opening covers the spraying area of ​​all cleaning nozzles 321 on the cleaning pipe 32. The water sprayed by the cleaning nozzle 321 can be used to backwash the filter barrel 22, and the impurity particles after flushing will also fall into the dirt collection frame 41 below. The dirt collection frame 41 is used to collect impurities on the filter barrel 22 flushed by the cleaning component. A plurality of through holes 411 are evenly opened on the dirt collection frame 41. The through holes 411 are provided so that the impurity particles and water after flushing can be separated through the through holes 411 after entering the dirt collection frame 41, so that the water entering the dirt collection frame 41 enters the filter barrel 22 again through the through holes 411. The aperture of the through hole 411 is less than or equal to the aperture of the filter hole 221, so that the through hole 411 can effectively separate the impurity particles and the water after flushing, and the separated water can enter the collection barrel 23 along the filter hole 221 of the filter cartridge. In this embodiment, a water pump can also be provided on the outside of the housing 1, one end of the water pump is connected to the collection tank 231 through a pipeline, and the other end of the water pump is connected to the water inlet pipe 31 through a pipeline, so that the flushing water can be recycled, thereby reducing the cost of the entire cleaning process and saving water resources. The dirt collecting box 43 is slidably mounted on the cylindrical barrel 11. The sliding mounting method facilitates that when there are many impurity particles in the dirt collecting box 43, the dirt collecting box 43 can be pulled out from the cylindrical barrel 11 and the hole groove to the outside of the housing 1, so as to further process the impurity particles collected in the dirt collecting box 43. The dirt collecting box 43 is located below the dirt collecting frame 41. One end of the dirt collecting box 43 close to the dirt collecting frame 41 extends into the filter barrel 22 to the bottom of the dirt collecting frame 41, so that the dirt collecting box 43 and the dirt collecting frame 41 partially overlap in the vertical direction. The scraper 42 is installed in the dirt collecting frame 41, and the scraper 42 is used to scrape the impurities in the dirt collecting frame 41 into the dirt collecting box 43. The dirt collecting frame 41 is provided with a sewage outlet 414, and the sewage outlet 414 is opened on the side wall of the dirt collecting frame 41 close to the dirt collecting box 43. In actual operation, the scraper 42 can periodically scrape away the foreign particles collected in the dirt collecting frame 41 , and the scraped foreign particles can be transported to the dirt collecting box 43 through the sewage outlet 414 .By providing the scraper 42 and the dirt collecting box 43, the foreign particles collected on the dirt collecting frame 41 can be uniformly collected and processed, and when the amount of foreign particles in the dirt collecting box 43 reaches an upper limit, the dirt collecting box 43 can be pulled out of the cylindrical tube 11 to pour out the foreign particles in the dirt collecting box 43 and further process them.

[0038] The rotation speed of the filter barrel 22 during the filtering operation can be 20 to 25 rpm, and can be reduced to 5 to 10 rpm in the cleaning mode to increase the flushing time of the cleaning nozzle 321 on the surface of the filter barrel 22.

[0039] In this embodiment, the water outlet diameter of the cleaning nozzle 321 can be 24 mm, the spray angle can be 30°-60°, and the arrangement density of the cleaning nozzle 321 is 24 cleaning nozzles 321 per 10 cm filter barrel circumference. The cleaning water pressure is controlled within the range of 0.2-0.6 MPa to ensure efficient cleaning of adhered foreign particles.

[0040] The scraper 42 can be moved back and forth in the dirt collecting frame 41 by electric drive, or by manual push and pull. In actual operation, any of the above two methods can be selected according to actual needs, and the above methods can be used to scrape the foreign particles in the dirt collecting frame 41 and push them into the dirt collecting box 43 through the sewage outlet 414.

[0041] The cleaning pipe 32 may be an arc-shaped structure, please refer to Figure 2 and Figure 3 The center of the arc-shaped cleaning pipe 32 coincides with the center of the filter barrel 22. Figure 7 The cleaning nozzle 321 of the cleaning pipe 32 is aimed at the filter hole 221, so that the water sprayed from the cleaning nozzle 321 can be directly sprayed to the filter hole 221 during cleaning, thereby quickly cleaning the filter hole 221, so that the impurity particles blocked in the filter hole 221 can fall into the dirt collecting frame 41 under the action of water and its own gravity. The spraying method directly aimed at the filter hole 221 can not only improve the cleaning efficiency, but also save water resources.

[0042] The dirt collecting box 43 can be installed in the cylindrical tube 11 through a slide rail, the slide groove width of the slide rail is 5-8mm, and the gap between the slider and the slide groove is 0.1-0.3mm. The dirt collecting box 43 can have a capacity of 5-10L, and a transparent window is set on the top to facilitate observation of impurity filling.

[0043] In this embodiment, the dirt collecting frame 41 includes two side panels 1, two side panels 2 and a bottom plate, and the two side panels 1, two side panels 2 and the bottom plate are used to enclose the dirt collecting frame 41. The bottom plate is arranged horizontally, the two side panels 1 are arranged on the left and right sides of the bottom plate, and the two side panels 2 are arranged on the front and back sides of the bottom plate. The side panel 1 includes a plate body 1 and a plate body 2, and the plate body 2 is arranged vertically, one end of the plate body 1 is fixedly connected to the bottom plate, and the other end of the plate body 1 is connected to the plate body 2, and the distance between the two plate bodies 2 is greater than the length of the bottom plate.

[0044] The diameter of the through hole 411 of the dirt collecting frame 41 can be 0.1-0.2 mm, which is smaller than 50% of the diameter of the filter hole 221 in the filter barrel 22, and the distance between the two through holes can be 510 mm. The bottom plate of the dirt collecting frame 41 can be set at an angle of 10°-15° with the horizontal plane to guide foreign particles to slide into the dirt collecting box 43.

[0045] In this embodiment, please refer to Figure 6 and Figure 8 The sewage outlet 414 is arranged on the second side plate close to the sewage collecting box 43 .

[0046] Please refer to Figure 4 , two brushes 412 are provided on the dirt collecting frame 41, and the two brushes 412 are symmetrically installed on the plate body 2, and the end of the brush 412 away from the dirt collecting frame 41 contacts the inner wall of the filter barrel 22. The brush 412 includes a mounting block and a brush body, the brush body is fixedly connected to the mounting block, and the mounting block is slidably installed in the slot, so that the mounting block can drive the brush body to be installed on the plate body 2. When the brush 412 is installed on the plate body 2, the brush body contacts the inner wall of the filter barrel 22. By setting the brush 412, when the circulating water microfiltration device is filtering, the driving member 21 drives the filter barrel 22 to rotate, and the brush 412 will promptly brush away the impurity particles adhering to the filter barrel 22, thereby preventing the impurity particles from clogging the filter barrel 22, thereby improving the filtering time of the entire circulating water microfiltration device.

[0047] Please refer to Figure 2 and Figure 4The outer wall of the collection barrel 23 is provided with multiple groups of ultrasonic transducers 232 at intervals along the axial direction. Each group of ultrasonic transducers 232 is circumferentially distributed on the outer wall of the collection barrel 23. The ultrasonic transducers 232 are used to generate ultrasonic waves, which cause particles adhering to the filter barrel 22 to fall off from the inner wall of the filter barrel 22. When cleaning the circulating water microfiltration equipment, ultrasonic waves can be generated by the ultrasonic transducers 232. The cavitation, acceleration and straight-forward flow effects generated by ultrasonic waves in the liquid are used to directly or indirectly act on the impurity particles adhering to the filter barrel 22, so that the impurity particles are dispersed and emulsified. The cleaning component is used to cause the impurities to fall off the filter barrel 22, thereby improving its cleaning efficiency, extending the service life of the filter barrel 22, and reducing the maintenance cost of the circulating water microfiltration equipment and the water consumption of the cleaning component.

[0048] The ultrasonic transducer 232 can be round or square and evenly distributed on the collection barrel 23, so that the ultrasonic transducer 232 can effectively disperse and emulsify the impurity particles adhered to various places on the filter barrel 22. Then, the filter barrel 22 is driven to rotate by the driving member 21 and cooperates with the backwashing operation of the cleaning component, so that the filter barrel 22 can be cleaned in all directions and thoroughly, thereby improving the cleaning efficiency of the filter barrel 22.

[0049] The working frequency of the ultrasonic transducer 232 is 40kHz to 100kHz, and the power range is 50W to 100W. The installation spacing of the ultrasonic transducers 232 is 5 to 10cm, and they can be evenly distributed along the outer wall of the collection barrel 23. In addition, the ultrasonic transducers 232 can also cover the inner and outer walls of the filter barrel 22.

[0050] Please refer to Figure 4 and Figure 5 A plurality of ultraviolet lamps 12 may be installed on the inner wall of the shell 1, and the plurality of ultraviolet lamps 12 are distributed along the axial direction of the filter barrel 22. The ultraviolet lamps 12 may generate ultraviolet rays of a certain wavelength and intensity, and the ultraviolet rays may destroy the DNA and RNA of bacteria in the tail water, so that the ultraviolet lamps 12 are used to sterilize the bacteria in the filter barrel 22.

[0051] In this embodiment, the ultrasonic transducer 232 can generate ultrasonic waves of a certain frequency and intensity, and the cavitation effect generated by the ultrasonic waves in the liquid can destroy the cell wall and membrane structure of the bacteria, while the ultraviolet rays generated by the ultraviolet lamp 12 can destroy the DNA and RNA of the bacteria, making the bacteria lose their reproductive ability. By providing the ultrasonic transducer 232 and the ultraviolet lamp 12, not only can the cleaning process of the circulating water microfiltration equipment be accelerated, but the filter barrel 22 can also be sterilized while cleaning.

[0052] Please refer to Figure 4The cleaning assembly also includes two rubber baffles 33, which are symmetrically arranged on both sides of the cleaning pipe 32. One end of the rubber baffle 33 is fixed to the cleaning pipe 32, and the other end of the rubber baffle 33 extends in the radial direction of the filter barrel 22 to contact the outer wall of the filter barrel 22. In this embodiment, by providing two rubber baffles 33, the water sprayed from the cleaning nozzle 321 on the cleaning pipe 32 can be converged, so that it can clean the filter barrel 22 located between the two rubber baffles 33, so that water resources will not be wasted during the cleaning process. When the filter barrel 22 rotates, since it contacts the outer wall of the filter barrel 22, it can scrape the outer wall of the filter barrel 22. At the same time, the rubber baffle 33 is relatively soft in texture and will not cause scratches on the filter barrel 22 when scraping the outer side of the filter barrel 22.

[0053] When the circulating water microfiltration equipment is cleaned in this scheme, the ultrasonic transducer 232 can use ultrasonic waves to disperse and emulsify the impurity particles adhered to the filter barrel 22, thereby reducing the adhesion between the impurity particles and the filter barrel 22. The filter barrel 22 is driven to rotate slowly by the driving member 21. During the rotation process, the rubber baffle 33 and the brush body can simultaneously scrape the impurity particles adhered to the outer and inner sides of the filter barrel 22. Through the coordinated cooperation of the ultrasonic transducer 232, the rubber baffle 33, and the brush body, the impurity particles can be quickly peeled off from the filter barrel 22, and then through the backwashing of the cleaning nozzle 321, the impurity particles adhered to the filter barrel 22 can be quickly separated from the filter barrel 22 and fall into the dirt collecting frame 41. Through the cooperation of the above-mentioned components, the filter barrel 22 can be cleaned quickly, with fast cleaning speed and high cleaning efficiency, and at the same time, the water resources consumed during the cleaning process can be reduced, thereby saving water resources.

[0054] The circulating water microfiltration equipment may also include a set of control systems, which can be used to monitor various operations of the circulating water microfiltration equipment during the filtering process and various parameters of each operation, and the control system can also monitor the filtering speed and filtering effect in the circulating water microfiltration equipment. The monitoring process can be operated with reference to the means of control system monitoring in the prior art. When the control system detects that the filtering effect of the filter barrel 22 is not good, the circulating water microfiltration equipment can stop the filtering operation, and the control system can start the cleaning component to clean the circulating water equipment.

[0055] The control system can monitor the internal and external pressure difference of the filter barrel 22 in real time through sensors, which is 0-20.1 MPa, the filtration flow rate is 10-20 L / min, and the cleaning water consumption is 5-10 L / time. When the internal and external pressure difference of the filter barrel exceeds 0.08 MPa, the control system automatically triggers the cleaning mode and starts the ultrasonic transducer 232, the cleaning nozzle 321 and the scraper 42 to work in sequence.

[0056] In actual operation, the water used to clean the components can be backwashed with external water or with tail water filtered by filtration. Backwashing with tail water after filtration can effectively save water resources.

[0057] Example 2

[0058] A method for cleaning a circulating water microfiltration device as in Example 1, comprising the following steps:

[0059] S1, start the ultrasonic transducer 232 and the ultraviolet lamp 12 in the circulating water microfiltration device in Example 1. The ultrasonic wave generated by the ultrasonic transducer 232 can perform cavitation, acceleration and straight flow on the impurity particles adhering to the filter barrel 22, so that the impurity particles are dispersed and emulsified. The ultraviolet rays generated by the ultraviolet lamp 12 can sterilize the bacteria on the filter barrel 22.

[0060] S2, after the ultrasonic transducer 232 and the ultraviolet lamp 12 have been working for 8 minutes, the cleaning assembly and the driving member 21 are started at the same time, the driving member 21 will drive the filter barrel 22 to rotate, and the brush 412 on the dirt collecting frame 41 will scrape the impurity particles adhering to the inner wall of the filter barrel 22. At the same time, the cleaning nozzle 321 can backwash the impurity particles adhering to the filter barrel 22, so that the impurity particles on the filter barrel 22 fall into the dirt collecting frame 41, and the cleaned water enters the collection barrel 23 through the through hole 411 on the dirt collecting frame 41 and the filter hole 221 on the filter barrel 22.

[0061] S3, during the cleaning process of the cleaning component, the scraper 42 will regularly scrape the foreign particles accumulated on the dirt collecting frame 41 into the dirt collecting box 43, and the scraper 42 scrapes once every 5-8 minutes.

[0062] S4, after the cleaning is completed, the ultrasonic transducer 232, the ultraviolet lamp 12 and the cleaning component are turned off respectively, thereby ending the cleaning operation.

[0063] It is understandable that during the cleaning process, the rotation speed of the filter barrel 22 is 5rpm-10rpm. By setting this rotation speed, the filter barrel 22 will rotate very slowly during cleaning, so that the cleaning nozzle 321 will have more time to rinse the same area on the filter barrel 22, thereby improving its cleaning efficiency. At the same time, the driving member 21 drives the filter barrel 22 to rotate, and the cleaning nozzle 321 can clean all parts of the filter barrel 22, thereby achieving all-round cleaning of the filter barrel 22.

[0064] The above describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention to be protected. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A circulating water microfiltration device, characterized in that: It includes: A shell body (1), wherein a cylindrical barrel (11) is fixedly installed in the shell body (1). A filter assembly, used for filtering tail water in an aquaculture process; the filter assembly comprises a driving member (21), a filter barrel (22) and a collection barrel (23); the collection barrel (23) is mounted on the bottom of the housing (1); a collection tank (231) is provided in the collection barrel (23); the filter barrel (22) is transversely arranged in the collection tank (231); one end of the filter barrel (22) is rotatably connected to the cylindrical barrel (11); the other end of the filter barrel (22) passes through the housing (1) and is connected to the driving member (21); tail water to be filtered enters the filter barrel (22); a plurality of filter holes (221) are evenly provided on the barrel wall of the filter barrel (22); the driving member (21) drives the filter barrel (22) to rotate, impurities in the tail water remain in the filter barrel (22), and the filtered tail water flows into the collection tank (231) through the filter holes (221); a cleaning assembly, which is mounted on the housing (1) and is located above the filter barrel (22), the cleaning assembly comprising a water inlet pipe (31) and a cleaning pipe (32), the cleaning pipe (32) being provided with a plurality of cleaning nozzles (321), the plurality of cleaning nozzles (321) being all aimed at the filter barrel (22); A dirt collecting assembly, comprising a dirt collecting frame (41), a scraper (42) and a dirt collecting box (43); one end of the dirt collecting frame (41) is fixed to the inner wall of the cylindrical barrel (11), the other end of the dirt collecting frame (41) extends into the filter barrel (22), and the dirt collecting frame (41) extending into the filter barrel (22) is located directly below the cleaning pipe (32); the dirt collecting frame (41) is used to collect impurities on the filter barrel (22) flushed by the cleaning assembly; a plurality of through holes (411) are evenly opened on the dirt collecting frame (41), and the aperture of the through holes (411) is less than or equal to the aperture of the filter barrel (22); The hole (221) has an aperture of 0.1 mm, and water entering the dirt collecting frame (41) enters the filter barrel (22) again through the through hole (411); the dirt collecting box (43) is slidably mounted on the cylindrical barrel (11), the dirt collecting box (43) is located below the dirt collecting frame (41), and one end of the dirt collecting box (43) close to the dirt collecting frame (41) extends into the filter barrel (22) to the bottom of the dirt collecting frame (41); the scraper (42) is mounted in the dirt collecting frame (41), and the scraper (42) is used to scrape impurities in the dirt collecting frame (41) into the dirt collecting box (43).

2. The circulating water microfiltration equipment according to claim 1, characterized in that: The dirt collecting frame (41) is provided with two brushes (412), which are symmetrically mounted on the dirt collecting frame (41), and one end of the brush (412) away from the dirt collecting frame (41) contacts the inner wall of the filter barrel (22).

3. The circulating water microfiltration equipment according to claim 2, characterized in that: The brush (412) comprises a mounting block and a brush (412) body; the mounting block is plugged into the side wall of the dirt collecting frame (41); the brush (412) body is fixedly mounted on the mounting block; the brush (412) body is an arc-shaped structure; and the brush (412) body is attached to the surface of the inner wall of the filter barrel (22).

4. The circulating water microfiltration equipment according to claim 1, characterized in that: The cross-section of the collecting barrel (23) is a semicircular structure, and a plurality of groups of ultrasonic transducers (232) are installed on the outer wall of the collecting barrel (23) at intervals along the axial direction, and each group of ultrasonic transducers (232) is distributed in a circular shape on the outer wall of the collecting barrel (23), and the ultrasonic transducers (232) are used to generate ultrasonic waves, and the particles adhered to the filtering barrel (22) are caused to fall off from the inner wall of the filtering barrel (22) through the ultrasonic waves.

5. The circulating water microfiltration equipment according to claim 1, characterized in that: The circulating water microfiltration device also includes a water pump, which is installed on the outside of the shell (1), one end of the water pump is connected to the collection barrel (23), and the other end of the water pump is connected to the water inlet pipe (31). The water pump transmits the water filtered by the collection barrel (23) to the cleaning nozzle (321), and the cleaning nozzle (321) is used to backwash impurities on the inner wall of the filter barrel (22).

6. The circulating water microfiltration equipment according to claim 1, characterized in that: A sewage outlet (414) is provided on a side wall of the sewage collecting frame (41) close to the sewage collecting box (43); the scraper (42) scrapes off impurities in the sewage collecting frame (41) and transports them to the sewage collecting box (43) through the sewage outlet (414); And / or, the dirt collecting frame (41) is provided with an opening, the opening faces the cleaning pipe (32), and the area of ​​the opening covers the spraying areas of all cleaning nozzles (321) on the cleaning pipe (32).

7. The circulating water microfiltration equipment according to claim 1, characterized in that: The cleaning pipe (32) is an arc-shaped structure, and the center of the arc-shaped cleaning pipe (32) coincides with the center of the filter barrel (22).

8. The circulating water microfiltration equipment according to claim 1, characterized in that: The cleaning assembly further comprises two rubber baffles (33), the two rubber baffles (33) being symmetrically arranged on both sides of the cleaning pipe (32); one end of the rubber baffle (33) is fixed to the cleaning pipe (32), and the other end of the rubber baffle (33) extends in the radial direction of the filter barrel (22) until it contacts the outer wall of the filter barrel (22).

9. The circulating water microfiltration equipment according to claim 1, characterized in that: A plurality of ultraviolet lamps (12) are installed on the inner wall of the shell (1), and the plurality of ultraviolet lamps (12) are distributed along the axial direction of the filter barrel (22). The ultraviolet lamps (12) are used to sterilize bacteria in the filter barrel (22).

10. A method for cleaning a circulating water microfiltration device according to any one of claims 1 to 9, characterized in that: It includes the following steps: S1, starting the ultrasonic transducer (232) and the ultraviolet lamp (12) in the circulating water microfiltration device, wherein the ultrasonic wave generated by the ultrasonic transducer (232) can perform cavitation, acceleration and straight-forward flow on the impurity particles adhering to the filter barrel (22), so that the impurity particles are dispersed and emulsified; and the ultraviolet rays generated by the ultraviolet lamp (12) can sterilize the bacteria on the filter barrel (22); S2, after the ultrasonic transducer (232) and the ultraviolet lamp (12) have been working for 5 minutes to 10 minutes, the cleaning component and the driving member (21) are started simultaneously, the driving member (21) drives the filter barrel (22) to rotate, the brush (412) on the dirt collecting frame (41) scrapes off the foreign particles on the inner wall of the filter barrel (22), and the cleaning nozzle (321) can rinse the foreign particles adhering to the filter barrel (22), so that the foreign particles on the filter barrel (22) fall into the dirt collecting frame (41), and the cleaned water enters the collection barrel (23) through the through hole (411) on the dirt collecting frame (41) and the filter hole (221) on the filter barrel (22); S3, during the process of the cleaning component cleaning the circulating water microfiltration device, the scraper (42) will regularly scrape the foreign particles accumulated on the dirt collection frame (41) into the dirt collection box (43), and the scraper (42) scrapes once every 5-8 minutes; S4, after the cleaning is completed, the ultrasonic transducer (232), the ultraviolet lamp (12) and the cleaning component are turned off respectively, thereby ending the cleaning operation.

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