Microfilter

Abstract

The invention belongs to the technical field of water filtration and purification, and particularly discloses a microfilter. Comprising an outer box body and a sewage pipe communicated into the outer box body from the outside, the sewage pipe is provided with a sewage outlet after being communicated into the outer box body from the outside from top to bottom, the sewage outlet is obliquely arranged relative to the vertical direction of the outer box body, and the sewage pipe is rotatably connected with a filter cartridge with one wide end and one narrow end in the outer box body; the sewage outlet penetrates through the movable bearing from the end, with the high water level, of the filter cartridge and then is led into an inner cavity of the filter cartridge, so that sewage jet flow sprayed out of the sewage outlet of the sewage pipe makes contact with the inner wall of the filter cartridge, and the filter cartridge is pushed to rotate around the hinged position of the filter cartridge through impact force of the sewage jet flow. According to the technical scheme, the dependence of the micro-filter on a water pump is greatly reduced, sewage flow is ingeniously utilized to drive the filter cartridge to rotate automatically and filter sewage, the requirements of various culture ponds can be met, and particularly, the application effect of a high-density culture pond needing compact layout is better.

Description

Technical Field

[0001] The invention belongs to the technical field of water filtering and purification, and specifically discloses a microfiltration machine. Background Art

[0002] High-density aquaculture is an important part of modern industrial fish farming. It can maximize the compression of aquaculture space while increasing the scale and output of high-density factory fish farming. In order to enable the smooth implementation of this technology, the structure and quality of the microfiltration machine used for aquaculture water filtration have become an indispensable part of the water circulation system.

[0003] Traditional rotary drum microfiltration is a type of water circulation filtration equipment widely used in commercial fish farms. Its basic principle is to continuously inject dirty water into the filter drum with an ultra-fine filter screen through continuous rotation. The limited height difference between the dirty water and clean water inside and outside the drum compresses the pores of the micro-filter screen on the drum surface, allowing water to seep out and form filtration. When the dirty water and impurities reach the set requirements in the drum, they pass through the backflush nozzles arranged outside the drum, and the sewage tank below receives them. The impurities are backwashed from the drum surface back into the sewage tank inside the drum and then flow out. The sewage and clean water are only separated by a net in the tank. The filtered water is returned to the clean water tank for continuous circulation. This traditional water treatment structure has caused frequent problems in the microfiltration circulation filtration and low efficiency. In order to cooperate with the traditional spray flushing and filtration system mentioned above, the drum itself needs to be continuously driven by a motor to rotate together with sewage impurities. The pressure and load are often too large, and the microfilter is often at risk of clogging. If the working conditions of the vertical or horizontal drum can be improved and the force of the sewage flow and the impact of backwashing can be used to solve the problem and simplify the power of driving the drum, the impact of the sewage outflow can be converted into the ability to rotate the drum with microfilter. While reducing the energy consumption of the microfiltration system, the drum of this type of microfiltration system will never be immersed in water and will only work on clean water, with clean water entering and unclean water discharged, the filtration efficiency will be significantly improved.

[0004] For example, in the invention patent application published in 2019 with application number 201910567223.9, a microfiltration machine and a microfiltration sedimentation integrated machine with a backwash device were disclosed. The microfiltration machine part adopts a longitudinally arranged filter cylinder structure. After the sewage comes into contact with it from the outside of the filter cylinder, it is filtered into the filter cylinder using the principle of osmotic pressure, and the purified water is sent out through the water outlet at the bottom of the filter cylinder. A backwash nozzle that can rotate 360° is set in the filter cylinder to flush impurities back into the sewage water body, thereby realizing the purification cycle.

[0005] The above structure drives the water spray pipe instead of the heavy drum, which reduces the burden on the driving motor and the power requirement of the driving motor. However, it is still necessary to drive a rotating structure so that the "filtration-cleaning-filtration" cycle can continue. If the above structure can be further optimized, the energy consumption level of the equipment can be reduced to a new stage, and it can also be better. In addition, since the existing technology requires that the filter cartridge structure of the microfiltration machine be immersed in the water to be purified, whether it is a vertical or horizontal microfiltration machine, the installation and maintenance of the above equipment require the water to be emptied in advance. This brings great limitations to the selection of the installation location and assembly and maintenance of the equipment. It is relatively inconvenient for equipment such as microfiltration machines that need to work for a long time. In addition, the more complex layout conditions also increase the installation and use costs. Summary of the Invention

[0006] With respect to the problems mentioned in the background technology, the present invention has made targeted improvements and achieved the desired technical effects by combining the following technical solutions, which are specifically achieved through the following technical contents: A microfiltration machine comprises an outer box and a sewage pipe connected from the outside to the outer box, wherein the sewage pipe is provided with a sewage outlet after entering the outer box from the outside from top to bottom, and the sewage outlet is inclined relative to the vertical direction of the outer box; A filter cartridge with one end wide and the other narrow is rotatably connected within the outer casing between the sewage outlet of the sewage pipe and the outer casing. The filter cartridge is arranged vertically or horizontally. The end of the filter cartridge where the water level is higher is hinged to the outer casing via a movable bearing, while the end where the water level is lower is hinged to the outer casing via a rotating shaft. The sewage outlet passes through the movable bearing from the end where the water level is higher and enters the inner cavity of the filter cartridge, so that the sewage jet ejected from the sewage outlet of the sewage pipe contacts the inner wall of the filter cartridge, and the impact force of the sewage jet drives the filter cartridge to rotate around the hinge of the filter cartridge. A clean water tank and a sewage tank are provided in the outer box body, and the sewage tank, the clean water tank and the filter cartridge are in the same space. A partition is provided between the sewage tank and the clean water tank, which surrounds the low water level end of the filter cartridge. The filter cartridge is provided with a plurality of filter ports on the side wall, and each of the filter ports is embedded with a micro-filter. A circle of sewage drain ports is provided around the lowest water level of the filter cartridge, and the sewage drain port is connected to the sewage tank. The space between the outside of the sewage tank and the inside of the outer box body is set as the clean water tank, and the clean water tank and the sewage tank are independently provided with drainage ports. At least one circulation pump is connected in the clean water tank, and the water outlet of the circulation pump is connected to at least one set of backflush nozzles spraying toward the filter cartridge.

[0007] As a further technical solution of the present invention, when the filter cartridge is in a vertical layout, the sewage pipe extends into the filter cartridge from the top of the filter cartridge, and the number of sewage outlets is ≥1. The top of the filter cartridge is movably connected to the outer box body through a movable bearing, and the center of the bottom end of the filter cartridge is recessed inward, and the center of the recess is sequentially connected to the bottom of the sewage tank through a fixedly connected rotating shaft and a waterproof bearing fitted outside the rotating shaft, so that a rotating pair is formed between the rotating shaft and the waterproof bearing. The sewage drain outlet is arranged at the lowest position of the filter cartridge around the rotating shaft, and the sewage drain outlet extends deep into the sewage tank.

[0008] As a more preferred option of the above technical solution, the sewage tank is composed of at least a circle of tank side panels fixed to the bottom of the outer box body and a tank top panel covering the top of all the tank side panels, and the tank top panel is provided with a sewage tank opening for the bottom of the filter cartridge to pass through, and the sewage tank opening is provided with a stop edge surrounding it, and the actual separation between the sewage tank and the clean water tank is formed by the tank top panel, the tank side panels and the stop edge, and the setting height of the stop edge is higher than the opening height of the sewage drain outlet.

[0009] As a further technical solution of the present invention, when the filter cartridge is in a horizontal layout, its rotation axis remains horizontal, the inner diameter of one end in the length direction is narrower to form a high water level, and is hinged to the inner wall of the clean water tank through a movable bearing, and the inner diameter of the other end in the length direction is wider to form a low water level, and is hinged to the inner wall of the sewage tank through a bearing; after the sewage pipe is passed into the inner cavity of the filter cartridge from the end at the high water level of the filter cartridge, the sewage outlet is arranged obliquely downward, and the number of sewage outlets is ≥1; the sewage drain is opened on the inner wall of the low water level end of the filter cartridge, and exists independently of the area of ​​the microfilter.

[0010] As a more preferred option of the above technical solution, the sewage tank and the clean water tank are separated by a tank side panel, and a circular opening for the low water level end of the filter cartridge to pass through is provided on the tank side panel, and the filter cartridge only has a sewage drain outlet for sewage to pass through in the sewage tank area and no other openings for flowing water to pass through.

[0011] As a further technical solution of the present invention, the diameter range of the sewage outlet is 30mm-400mm.

[0012] As a further technical solution of the present invention, the mesh size of the microfilter is 400-2000 mesh, and the microfilter at the lowest water level of the filter cartridge is 10 cm-40 cm higher than the sewage outlet of the filter cartridge.

[0013] As a further technical solution of the present invention, the bottom edge of the clean water tank is provided with UV lamps irradiating toward the center of the clean water tank, a waterproof seal is made between the UV lamps and the clean water tank, and the number of groups of UV lamps is greater than or equal to.

[0014] As a further technical solution of the present invention, the taper range of the filter cartridge is 1.5-0.25.

[0015] As a further technical solution of the present invention, the clean water tank is also provided with a medicine delivery port which is communicated with the inside and outside. The medicine delivery port is connected to a medicine metering pump, and the medicine metering pump is connected to an ecological additive storage tank.

[0016] The beneficial effects of the present invention are: it simplifies the transmission structure of the electric-driven drum half-immersed in water and the structure driven by electricity, and cleverly utilizes the water flow at the sewage source in the existing water circulation system, so that the microfiltration system can automatically and continuously perform the "filtration-cleaning-filtration" cycle without the need to set up a motor. The overall structure is simple, clever and effective, with controllable specifications. It can greatly simplify the difficulty of the sewage filtration structure of the microfiltration machine in the aquaculture system and reduce the energy consumption required for the aquaculture process. The maintenance cost of the equipment is also reduced. For high-density fish farming facilities of various sizes, the technical solution of the present invention can cope well with it, so it is an effective and popularizable technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the vertical layout effect of the microfiltration machine of the present invention.

[0018] Figure 2 This is a top view and cross-sectional schematic diagram of the cooperation between the filter cartridge 3 and the sewage pipe 2 according to the present invention.

[0019] Figure 3 Schematic diagram of another form of the sewage outlet 20 of the sewage pipe 2 of the present invention.

[0020] Figure 4 This is a schematic diagram of another form of the filter cartridge 3 of the present invention.

[0021] Figure 5 This is a schematic diagram of the horizontal layout effect of the microfiltration machine of the present invention.

[0022] Figure 6 This is a schematic diagram of the implementation effect of the microfiltration machine of the present invention.

[0023] Among them: A-sewage jet; B-cleaning jet; 1-outer box; 2-sewage pipe; 20-sewage outlet; 3-filter cartridge; 30-filter hole; 31-microfilter; 32-rotating shaft; 33-waterproof bearing; 34-sewage drain outlet; 35-movable bearing; 36-fin; 4-sewage tank; 40-sewage tank opening; 41-tank side panel; 42-tank top panel; 43-stop edge; 5-clean water tank; 50-drug delivery port; 51-UV irradiation lamp; 6-drain outlet; 7-circulation pump; 8-backflush nozzle; 9-dosage metering pump. DETAILED DESCRIPTION

[0024] The following describes the implementation of the present invention in conjunction with the relevant embodiments and drawings. Figures 1 to 6 As shown, the present invention discloses a microfiltration machine, comprising an outer box 1 and a sewage pipe 2 connected from the outside to the outer box 1, wherein the sewage pipe 2 is connected from the outside to the outer box 1 from top to bottom, and the sewage outlet 20 is inclined relative to the vertical direction of the outer box 1; A filter cartridge 3 with one end wider and the other narrower is rotatably connected in the outer box 1 between the sewage outlet 20 of the sewage pipe 2 and the outer box 1. The filter cartridge 3 is arranged vertically or horizontally. The end of the filter cartridge 3 with a higher water level is hinged to the outer box 1 through a movable bearing 35 which can be regarded as a hollow shaft, while the end with a lower water level is hinged to the outer box 1 through a rotating shaft 32 (preferably a solid shaft). In the vertical layout, the wider end has a higher water level, while in the horizontal layout, the narrower end has a higher water level. The sewage tank 4 and the clean water tank 5 are both accommodated and fixed in the outer box 1 and are in the same space with the filter cartridge 3. The sewage outlet 20 of the sewage pipe 2 passes through the movable bearing 35 from the end with a higher water level and enters the inner cavity of the filter cartridge 3. After the sewage jet A ejected from the sewage outlet 20 of the sewage pipe 2 contacts the inner wall of the filter cartridge 3, the impact force of the sewage jet A pushes the filter cartridge 3 to rotate around the hinge of the filter cartridge 3. A partition structure is provided between the sewage tank 4 and the clean water tank 5, surrounding the low water level position of the filter cartridge 3. The filter cartridge 3 is provided with a plurality of filter ports 30 on the side wall, each of which is embedded with a micro-filter 31. The area where the filter ports 30 and the filter 31 are provided is divided into the clean water tank 5. A circle of sewage drain ports 34 is provided around the lowest water level of the filter cartridge 3. The sewage drain ports 34 are connected to the sewage tank 4. The space between the periphery of the sewage tank 4 and the bottom of the outer box body 1 is provided as the clean water tank 5. Both the clean water tank 5 and the sewage tank 4 are independently provided with a drain port 6. The clean water tank 5 is connected to at least one circulation pump 7, and the water outlet of the circulation pump 7 is connected to at least one set of backflush nozzles 8 that spray toward the filter cartridge 3. The clean water tank 5 is also provided with a drug delivery port 50 that is connected inside and outside, and the drug delivery port 50 is connected to a drug metering pump 9.

[0025] Combined with the above basic technical features, compared with the existing water circulation filtration system composed of a horizontal microfilter or a vertical microfilter as the core, the biggest difference of this solution is that the electric rotation structure used to drive the filter drum 3 is cancelled, and only the electrically driven cleaning nozzle 8 for cleaning the microfilter is retained. The recoil force becomes one of the assisting forces for the rotation of the filter drum 3, and even without the existence of the recoil nozzle 8, the filter drum 3 can be driven to rotate by relying solely on the sewage jet A from the sewage pipe 2, such as Figure 2The orientation of the sewage pipe 2 can determine the rotation direction of the filter cartridge 3. Compared with the existing horizontal microfiltration machine that needs to be immersed in the water body, this solution can be used without being completely immersed in the water body. The specific implementation method utilizes the following four basic technical elements: First, in the filter structure of this solution, the sewage pipe 2 in the filter cartridge 3 is relatively stationary, while the filter cartridge 3 itself can rotate. It is not necessary to immerse the entire filter cartridge 3 in the water to be filtered. Instead, it is wrapped and installed in an independent container, that is, the outer box 1. The sewage pipe 2 is connected to the filter cartridge 3, and the sewage outlet 20 sends out the sewage jet A, which will hit the inner wall of the filter cartridge. The side wall of the filter cartridge 3 is surrounded by a plurality of filter ports 30, and the filter ports 30 are embedded with micro-filters 31. Therefore, when the sewage jet A passes through the micro-filter 31, impurities in the water body will be intercepted by the micro-filter 31. At the same time, when the sewage jet A passes through the micro-filter 31, its impact force drives the filter cartridge 3 to rotate; Regardless of whether the filter cartridge 3 is arranged vertically or horizontally, as long as there is a contact angle between the inner wall of the filter cartridge 3 and the water flow in the sewage pipe 2, and it is ensured that the water flow in the filter cartridge 3 can flow out toward the sewage outlet 34 of the filter cartridge 3 under the action of its own weight, then the resistance required for the filter cartridge 3 to overcome the rotation will not be greater than the impact force of the sewage flow, so that the entire filter cartridge 3 can be driven to rotate only by the pump power of the sewage water pump connected to the breeding pond, and when the sewage jet A is larger, the higher the impact force of the water, the faster the rotation speed of the filter cartridge 3, and the corresponding sewage filtration amount is also greater.

[0026] Secondly, the setting of the filter cartridge 3 in this solution is not a simple improvement of the filter cartridge solution of the current vertical microfilter or horizontal filter, but a non-standard cylindrical frame configuration that is wide at the top and narrow at the bottom is selected. In this frame configuration, on the one hand, it is necessary to set up enough filter ports 30 to ensure that the microfilter 31 set in the filter port 30 forms an effective filtering structure. On the other hand, the filter cartridge 3 structure that is wide at the top and narrow at the bottom can ensure that when the sewage hits the frame of the filter cartridge 3 rather than the microfilter 31, it can flow downward along its inner wall to the area of ​​the microfilter 31 that is located lower, thereby ensuring that the sewage can be filtered out.

[0027] Third, based on the frame configuration of the filter cartridge 3 that is wide at one end and narrow at the other, when setting the sewage pipe 2, the sewage pipe 2 itself is arranged to be tilted downward relative to the inner wall surface of the filter cartridge 3, that is, the sewage outlet 20 is arranged to be tilted downward relative to the inner wall surface of the filter cartridge 3, so that the sewage jet A can obtain a certain gravitational potential energy when entering the filter cartridge 3, and allows the sewage jet A to better impact the filter cartridge 3. The filter cartridge 3 structure that is wide at one end and narrow at the other can relatively evenly withstand the impact force of the obliquely sprayed sewage, so that when the filter cartridge 3 rotates, compared with the inner wall of the cylindrical tube configuration, the filter cartridge 3 of the present invention has a larger intersection angle with the direction of the sewage jet A, and the inclined inner wall can have a more reasonable facing surface relative to the sewage jet A, which better drives the filter cartridge to rotate, and the passive rotation of the filter cartridge 3 will be relatively smoother.

[0028] Fourthly, since the filter cartridge 3 can rotate, it can avoid blockage caused by long-term flushing of the micro-filter 31 at the same position by sewage, and avoid the problem of reduced filtration efficiency. The backflushing nozzle 8 arranged on the outside of the filter cartridge 3 does not need to be provided with a rotating structure. It is only necessary to fix the installation position of the backflushing nozzle 8 to ensure that the clean water sprayed by the backflushing nozzle 8 can also be aimed at the outer surface of the filter cartridge 3. The rotation of the filter cartridge 3 can be used to clean the entire cartridge. The cleaning jet B and the sewage jet A in the flushing process form a benign coordination, and the filter cartridge 3 can be kept in the "filtration-cleaning-filtration" working cycle as in the prior art. Theoretically, only a row of backflushing nozzles 8 need to be set according to the height of the filter cartridge 3 to meet the flushing action of the entire filter cartridge. The water from the backflushing nozzle 8 is obviously a better choice than external clean water to re-flush the filter cartridge 3 with filtered water flushing out of the filter cartridge 3 from the inside to the outside.

[0029] Based on the combination of the above four basic technical elements, the microfiltration machine structure in this scheme can basically achieve continuous rotation of the filter cartridge 3 of the microfiltration machine system without setting a rotating motor and its transmission structure for driving the filter cartridge 3 to rotate, thereby completing the "filtration-cleaning-filtration" benign working cycle. As long as the drainage pump power in the water circulation system of the breeding pond is fully utilized, the components of the microfiltration machine structure can be simplified while retaining the desired use effect. The technical solution of the present invention fully utilizes its own structural characteristics and realizes reasonable improvement and innovation of the existing technical solutions, and therefore has a good foundation for technology promotion.

[0030] Moreover, since this solution can be set up independently from the water body to be filtered, the enclosed structure of the outer box body 1 does not need to be immersed in the water body of the breeding pond to filter water. When maintenance is required, compared with the existing equipment that needs to empty the breeding pond to carry out maintenance activities, this application only needs to intercept the water body to be purified to carry out the disassembly and maintenance and replacement of the equipment, and can have more free installation and setting options, such as integrated installation with high-density breeding ponds, or concentrated in one place for intensive management. Compared with the existing wet horizontal / vertical microfiltration machines, this solution has relatively outstanding technical advantages.

[0031] As a supplement to the necessary technical elements, the microfiltration machine in this solution should also have a container for carrying filtered water and waste, the necessary external mounting structure of the filter cartridge 3, the necessary physical structure of the filter cartridge 3 itself, and a water circulation system in the microfiltration machine. The following is explained in the above order. In order to meet the requirements of the above technical description, the filter cartridge 3 of this solution has two layout modes, which are explained in order: Combine Figures 1 to 4 As shown, the first is a vertical layout. In this layout mode, after the center of the bottom end of the filter cartridge 3 is recessed inward, the center of the recess is movably connected in sequence through a fixed rotating shaft 32 and a waterproof bearing 33 that cooperates with the outside of the rotating shaft 32 and is hinged to the sewage tank 4, so that a rotating pair is formed between the rotating shaft 32 and the waterproof bearing 33. A circle of sewage drain outlets 34 are arranged at the bottom of the filter cartridge around the rotating shaft 32, so that the opening height of the sewage drain outlet 34 is lower than the connection between the rotating shaft 32 and the filter cartridge 3, and the setting height of the stop edge 43 is higher than the opening height of the sewage drain outlet 34. After the sewage pipe 2 enters the inner cavity of the filter cartridge 3 from the top axis, the sewage outlet 20 is tilted downward, and the direction of the sewage jet sent out by the sewage outlet 20 is at an acute angle relative to the normal plane of the inner wall of the filter cartridge 3 at the sewage landing point.

[0032] Furthermore, the bottom of the filter cartridge 3 protrudes toward the inside of the filter cartridge 3, so that the connection between the filter cartridge 3 and the rotating shaft 32 is higher than other positions at the bottom of the filter cartridge 3, forming a cone, and sewage drain outlets 34 are opened around other positions at the bottom. In this way, the structure allows the axial end of the rotating shaft 32 to penetrate deeper into the interior of the filter cartridge 3, which can make the center of gravity of the filter cartridge 3 drop in disguise, improve the stability during rotation, and also facilitate sewage not to gather toward the installation position of the rotating shaft 32 when flowing downward, effectively protecting the matching relationship between the rotating shaft 32 and the fixed position of the filter cartridge 3, and also solving the problem of setting the position of the sewage drain outlet 34.

[0033] Furthermore, a support structure may be provided on the top of the outer box 1, extending inside or outside the box to connect with the movable bearing 35, thereby ensuring that the device structure can form a more unified whole and allowing the center of gravity of the device to remain at the axis without shaking, making it less likely that the filter cartridge 3 will shake during rotation, resulting in less vibration and noise, and extending the normal operating time of the device. The sewage tank 4 is composed of at least a circle of box side panels 41 fixed to the bottom of the outer box body 1 and a box top panel 42 covering the top of all the box side panels 41. The box top panel 42 is provided with a sewage tank opening 40 for the bottom of the filter cartridge 3 to pass through. The sewage tank opening 40 is provided with a retaining edge 43 surrounding it. The box top panel 42, the box side panels 40 and the retaining edge 43 form a partition structure that actually separates the sewage tank 4 and the clean water tank 5. The retaining edge 43 makes the actual height of the sewage tank opening 40 slightly higher than the height of the box top panel 42 of the sewage tank 4. When the filtered water filtered out of the micro-filter 31 of the filter cartridge 3 drips onto the box top panel 42, it will not slide into the sewage tank 4, but will only flow from the outside of the sewage tank 4 to the clean water tank 5. Preferably, the box top panel 42 should be high in the middle and low on all sides to ensure that the clean water can flow.

[0034] The above-mentioned vertical layout configuration, as a container for carrying filtered water and waste, needs to be explained in conjunction with the necessary physical structure of the filter cartridge 3 itself. Since the filter cartridge 3 is vertically arranged, its rotating shaft 32 is placed perpendicular to the ground. When the sewage passes through the micro-filter 31 of the filter cartridge 3, the dirt and impurities will be trapped in the filter cartridge 3 while the filtered water will flow out of the filter cartridge 3. Therefore, a sewage tank 4 and a clean water tank 5 should be set at the same time just below the filter cartridge 3, so that the sewage tank 4 is set inside the clean water tank 5, so that the clean water tank 5 is arranged around the sewage tank 4, and a waterproof bearing 33 should be set in the sewage tank 4. , used to fix the rotating shaft 32 of the filter cartridge 3, a sewage tank opening 40 should be opened above the sewage tank 4 for the rotating shaft 32 or the bottom end of the filter cartridge 3 to pass through, and the filter cartridge 3 needs to be provided with a sewage drain port 34 at its bottom, and the sewage drain port 34 also needs to be set away from the rotating shaft 32, and it is necessary to ensure that the sewage flowing out of the sewage drain port 34 can completely flow into the sewage tank 4 through the sewage tank opening for collection and discharge at the same time, rather than overflowing and flowing to the clean water tank outside, and the sewage tank and the clean water tank need to be provided with their own equal amount of discharge ports to facilitate the automatic flow of sewage and clean water to various functional positions for recycling.

[0035] Combine Figure 2 and Figure 5As shown, the second is a horizontal layout. In this layout mode, the filter cartridge 3 maintains the same or basically the same shape as the vertical layout. At the two ends of its rotation axis, one end is hinged to the inner wall of the clean water tank 5 through a movable bearing 35, and the other end is hinged to the inner wall of the sewage tank 4 through a common bearing such as a waterproof bearing 33. After the sewage pipe 2 enters the inner cavity of the filter cartridge 3 from the end with a higher water level, the sewage outlet 20 is also arranged tilted downward. Since the lowest water level of the horizontal filter cartridge 3 is at the end close to the wide body, in order to ensure that the sewage passes through In order to improve the filtration efficiency, the sewage drain outlet 34 needs to be opened on the inner wall at the low water level near one end of the wide body, or it can be extended along the slope of the inner wall of the filter cartridge 3 to a position near one end of the wide body, and multiple sewage outlets 20 are set, and distinguished from the area where the microfilter 31 exists. Furthermore, due to the characteristics of the horizontal layout rotating body, in order to avoid the problem of excessive sewage discharge projection area in the vertical direction, the horizontal layout must keep the rotation axis of the filter cartridge 3 horizontal, which is also convenient for dividing the area of ​​the clean water tank 5 and the sewage tank 4.

[0036] Furthermore, the partition structure in the horizontal layout is realized by the following manner: the partition structure includes: the partition between the sewage tank 4 and the clean water tank 5 corresponds to the dividing circle between the microfilter 31 and the sewage outlet 34 in the circumferential direction of the filter cartridge 3; a partition plate is provided between the sewage tank 4 and the clean water tank 5, which can also be regarded as the tank side plate 41 of the sewage tank 4; the top end of the partition plate extends vertically upward along the dividing circle of the filter cartridge 3, at least higher than the horizontal height of the diameter of the dividing circle; Based on the above-mentioned partition structure, when sewage is fed into the filter cartridge 3 from the sewage outlet 20 and contacts the microfilter 31, in order to allow the clean water to flow better into the clean water tank 5 rather than into the sewage tank 4, the sewage outlet 20 should be as close as possible to the clean water tank 5, so that the sewage flows in the microfilter 31 for a longer time, more dirt is intercepted by the microfilter 31, and the clean water flows along the inner wall of the filter cartridge 3 through the area where the microfilter 31 is located and falls into the area of ​​the clean water tank 5, while the dirt flows by gravity to the position of the sewage outlet 34 and finally enters the sewage tank 4. The top of the partition plate is higher than the diameter of the filter cartridge 3 to prevent the dirt from adhering to the inner wall of the filter cartridge 3 and being thrown out of the rolling filter cartridge 3 from the sewage outlet 34 into the clean water tank 5 before being further discharged; Alternatively, the partition plate may be provided with a circular opening surrounding the dividing circle, which can maximize the role of separating the clean water tank 5 and the sewage tank 4, forming a structure similar to the sewage tank opening 40 in a vertical layout environment, but in this case there is no structure similar to the tank top plate 42 or there is no need for the tank top plate 42 to exist, or the tank top plate 42 does not need to be the main structure separating the sewage tank 4 and the clean water tank 5. Similarly, in a horizontal layout, the clean water tank 5 can also be arranged around the sewage tank 4. It is only necessary to ensure that the sewage tank 4 does not communicate with the clean water tank 5, and the sewage pipe 2 is directly connected to the filter cartridge 3 in a completely sealed state. However, this layout method makes the division inside the outer box body 1 too complicated.

[0037] Compared with the vertical layout, the horizontal layout has a greater friction resistance than the vertical layout where the axis of the rotating shaft 32 and the movable bearing 35 of the sewage pipe 2 is perpendicular to the direction of gravity. In addition, in terms of the contact efficiency between the sewage outlet 20 of the sewage pipe 2 and the inner wall of the filter cartridge 3, although the sewage outlet 20 is sent into the filter cartridge 3 from the narrow end with a higher water level, so that the sewage can flow along a larger area of ​​the inner wall of the filter cartridge 3, thereby improving the water filtration rate, the water flow impact rotation torque obtained at the narrow end is smaller, and the rotation speed of the filter cartridge 3 cannot be increased. The sewage outlet 20 is sent into the filter cartridge 3 from the wide end. If a greater rotation speed acceleration force is to be obtained, the sewage must be sent out close to the end with a lower water level. The effective contact area between the sewage and the filter cartridge 3 will be reduced in disguise, and the filtration efficiency is difficult to balance. Therefore, the filtration efficiency of the horizontal layout is not as high as that of the vertical layout, but both provide more options for aquaculture environments that require the installation of microfiltration machines.

[0038] Reference Figure 1 or Figure 5 As shown, the filter cartridge 3 needs to have the necessary external mounting structure to ensure its rotation. The structure of the filter cartridge 3 in this solution, which is wide at the top and narrow at the bottom, causes it to be not in the center of its height and width directions, but to be biased towards the wider end. The sewage pipe 2 is arranged at the wider end of the filter cartridge 3, causing the impact of sewage to be closer to one end of the filter cartridge 3 rather than the center of the height and width directions. Therefore, relying solely on the rotation support provided by the waterproof bearing 33 from the sewage tank 4 is obviously insufficient in stability, and it is easy for the filter cartridge 3 to shake violently, and eventually the shaft may break or the waterproof bearing 33 may fail due to fatigue prematurely. Therefore, it is very necessary that the sewage pipe 2 is fixed to the shell of the outer box body 1, and the top end of the filter cartridge 3 is hinged between the sewage pipe 2 and the outer box body 1 through a movable bearing 35.

[0039] As a technical supplement, the diameter of the sewage outlet 20 of the sewage pipe 2 is negatively correlated with the number of sewage outlets 20, and the diameter range of the sewage outlet 20 of the sewage pipe is 30-400mm. The sewage pipe 2 enters the filter cartridge 3 through the movable bearing 35, which can also ensure that the rotation of the filter cartridge 3 does not interfere with the sewage pipe 2; According to the breeding density requirements of the breeding pond, the sewage pipe 2 can use a pipe with a specification of 30-400mm, and the preferred range is 50-160mm, which can meet the needs of most breeding ponds. In this diameter range, the movable bearing 35 does not need to be too large, and the rotation center coincidence degree of the movable bearing 35 and the waterproof bearing 33 is higher, and the filter cartridge 3 is less likely to shake when rotating.

[0040] The necessary physical structure of the filter cartridge 3 itself is a necessary guarantee to ensure that the filtration process can proceed smoothly and stably. The size of the filter cartridge 3 itself is preferably proportional to its rated flow rate, and the larger the volume of the filter cartridge 3, the more solid and reliable the material required to form its frame should be. For example, when the flow rate is small, a small organic polymer material frame that is chemically stable, lightweight, and strong can well meet the purposes of long-term operation and low replacement cost. When the flow rate is large, a large stainless steel frame can cope with larger water flow impact forces without deformation, and the overall structure is relatively more stable. In addition, since the filter cartridge frame itself needs to be hollowed out in multiple places to facilitate the installation of enough micro-filters 31, otherwise if the effective filtration area is insufficient, it will affect the efficiency of water filtration.

[0041] Combine Figure 1 、 Figure 2 and Figure 4 As shown, further, outwardly extending fins 36 are provided on the outer wall of the filter cartridge 3 between each filter port 30. All the fins 36 are arranged in an unfolded pine cone shape on the outer wall of the filter cartridge 3, so that the fins 36 are inclined downward in the vertical direction of the filter cartridge 3. In the vertical layout, the edges of the fins 36 are inclined downward in the vertical direction, while in the horizontal layout, the roots of the fins 36 are inclined downward in the vertical direction. The setting of any fin 36 is to ensure that the filtered water will not directly flow back into the filter cartridge 3 after flushing out the micro-filter 31. As the filter cartridge 3 rotates, the water is preferentially thrown out by the centripetal force. When the water that is not thrown away flows downward along the micro-filter 31, it will pass through the outer surface of the filter cartridge 3, more specifically, the lower edge of the hollow position of the filter port 30 where the micro-filter 31 is installed, which is turned outward from the filter cartridge 3. The water will also flow onto the surface of the fin 36 and continue to be thrown out as the filter cartridge 3 rotates, and it is basically difficult for the clean water to flow back into the sewage tank 4.

[0042] Combine Figure 1 or Figure 5As shown, preferably, the height of the sewage outlet 34 is lower than the height of the sewage tank opening to ensure that the sewage in the filter cartridge 3 can completely enter the sewage tank 4 when passing through the sewage outlet 34.

[0043] The outer box body 1 is set as an eight-sided closed box structure, enclosing the filter cartridge 3 inside itself, so as to ensure that the inside and outside can be isolated, the water in the filtration process will not be scattered, and the filtered clean water can be utilized to the maximum extent. The outside world will not interfere with the normal filtration and separation inside, and the side panel of the outer box body 1 can also serve as a fixing position for the mounting bracket of the recoil nozzle 8, so that the recoil nozzle 8 can be fixed in a position that is more suitable for flushing the filter cartridge 3, and then the filter cartridge 3 can be continuously sprayed.

[0044] Combine Figure 1 As shown, the bottom surface of the outer box body 1 is arranged tilted so that the bottom surfaces of the clean water tank 5 and the sewage tank 4 both have a lowest position, and a drain outlet 6 is provided at each lowest position.

[0045] In the outer box body 1, the sewage tank 4 forms an internal and external interlocking structure with the clean water tank 5, and the two actually share the same box bottom plate of the outer box body 1. In order to ensure that the sewage or clean water can be discharged as thoroughly as possible, first of all, the box bottom plate of the outer box body 1 should be tilted to ensure that the water can always maintain gravitational potential energy and generate flow, and the direction of the connection between the drain outlet 6 of the sewage tank 4 and the drain outlet 6 of the clean water tank 5 is preferably parallel to the tilt direction of the box bottom plate of the outer box body 1, so as to ensure that the drainage efficiency is maximized.

[0046] Furthermore, the mesh number of the microfilter 31 is 400-2000 mesh, and the microfilter 31 at the lowest water level of the filter cartridge 3 is at least 10 cm higher than the sewage outlet 34 of the filter cartridge 3, and no more than 40 cm at most, to ensure that the sewage and the filtered water can be completely separated. The mesh number range of the microfilter 31 on the filter cartridge 3 is 400-2000 mesh, and the preferred range is 600-1000 mesh. The mesh number range is adapted to the water condition of the target water body, among which 600-1000 mesh can meet the filtration needs of most aquaculture pond water.

[0047] Reference Figure 1 or Figure 5As shown, the internal water circulation system of the microfiltration machine is actually a structure arranged in the filter box to fully utilize the filtered water. Combined with the previous technical description, in fact, the circulation pump 7 for pumping filtered water for flushing in the circulation structure can be connected to the 1st, 2nd, 3rd and 4th groups of backflushing nozzles 8, so that the filter cartridge 3 can pass through more backflushing nozzles 8 when rotating, thereby improving the efficiency of flushing spraying. Therefore, the inner wall structure of the outer box 1 is fully utilized, and a bracket for fixing the backflushing nozzle is provided, so that the backflushing nozzle can be set on an inclined spray gun rack adapted to the contour of the filter cartridge, and spray the filter cartridge at a more appropriate angle; In addition, the direction of the resultant force of the water jet B of the backwash nozzle 8 and the sewage jet A of the sewage pipe 2 is consistent with the rotation direction of the filter cartridge 3. For the filter cartridge 3, when the injection angle of the backwash nozzle 8 is not perpendicular to the normal plane of the mounting surface of the microfilter 31 of the filter cartridge 3, if the injection angle of the backwash nozzle 8 is relatively in the same direction as the turning trend of the filter cartridge 3, the injected water flow can also accelerate the rotation of the filter cartridge 3 when hitting the filter cartridge 3, thereby increasing the rotation speed and centripetal force of the filter cartridge 3. In addition, the backwash of the water spray can flush the dirt retained by the microfilter 31 back into the filter cartridge 3 and finally discharge the dirt. The centripetal force of the filter cartridge 3 can also accelerate the separation of the retained dirt from the surface of the microfilter 31, so that the subsequent water body to be purified can be discharged and filtered for a longer time.

[0048] Reference Figure 1 or Figure 5 European style, further, a fixed position for the circulation pump 7 for the backflushing nozzle 8 should be provided inside the outer box 1 and in the clean water tank 5, so as to continuously pump excess filtered water for backflushing the filter cartridge 3, flushing away the dirt attached to the surface of the microfilter 31, and ensuring that the filtering efficiency of the microfilter 31 does not decrease prematurely; From the perspective of maximizing efficiency, it should be set at a low position close to the drain outlet 6 or the clean water tank 5 to ensure that a sufficient amount of filtered water is always available for the backflush nozzle 8. The flushing jet B that backwashes the outer surface of the filter cartridge through the backflush nozzle 8 will generate a rotation assist from top to bottom along the inner wall of the filter cartridge. The high-speed rotation of the filter cartridge 3 generates centrifugal force, which throws out the filtered water on the surface of the filter cartridge 3 or the mesh of the microfilter 31 and drops it into the clean water tank 5, while the part that cannot be thrown out will flow into the sewage tank 4 just below from the sewage drain outlet 34, thereby realizing the separation of filtered water and impurity water.

[0049] At the same time, the microfiltration system is based on the needs of the combination. Figure 5As shown, a clean water extraction pump can also be set at a high position of the equipment to send the water in the clean water tank 5 out from above the microfilter, while the dirt in the sewage tank 4 is sent out from below the microfilter to minimize the mixing between the two. At this time, the drain outlet 6 of the clean water tank 5 is set at a high position, or a separate low-level drain outlet 6 is opened (not shown in the figure).

[0050] Reference Figure 1 As shown, further, the edge of the clean water tank 5 is provided with a UV irradiation lamp 51 irradiating toward the center of the clean water tank 5, and a waterproof seal is made between the UV irradiation lamp 51 and the clean water tank. At the bottom plate position of the clean water tank 5 in the outer box body 1, several groups of UV irradiation lamps 51 can be set at the position of the box side plate of the clean water tank 5 (which is also the box side plate of the outer box body 1), which is used to perform preliminary ultraviolet light irradiation on the filtered water in the clean water tank 5, which helps to better carry out the subsequent disinfection and cleaning of the filtered water.

[0051] Combine Figure 1 and Figure 3 As shown, further, the sewage pipe 2 is provided with no less than one sewage outlet 20, and the sewage outlet 20 of the sewage pipe 2 can be a single opening or multiple openings. In the case of a single opening, the impact force of the water flow beam is greater, but in the case of multiple openings, the initial contact area between water and the microfilter is larger. The two are selected according to actual conditions. Preferably, a single opening is more suitable. The reason is that when the outer box body 1 is provided with a single top opening for passing into the sewage pipe 2, the diameter of the top opening of the outer box body 1 can be consistent with the diameter of the sewage pipe 2, and the sewage pipe 2 is easier to select materials during installation, and the sewage pipe 2 is not easily blocked at the position of the sewage outlet 20. However, since the diameter of the sewage pipe 2 determines the upper limit of the flow rate, the caliber of the sewage outlet 20 of the sewage pipe 2 is negatively correlated with the number of sewage outlets 20.

[0052] Reference Figure 5 or Figure 6 As shown, in addition, the clean water tank 5 is also provided with a drug delivery port 50 that is conductive inside and outside. The drug delivery port 50 is connected to a drug delivery metering pump 9, which is connected to an ecological additive storage tank that stores trace elements in the water body. The drain outlet 6 of the clean water tank 4 of the microfiltration machine can be connected to the drug delivery metering pump 9 through the drug delivery port 50 to add trace elements required for fish farming to the filtered water. This part of the trace elements is provided by ecological additives determined according to the differences in farmed fish. The ecological additives are manually delivered into the ecological additive storage tank for storage to ensure that the filtered water does not cause drastic changes in the water environment of the breeding pond when it flows back to the breeding pond.

[0053] Reference Figure 6As shown, as a further preferred method of setting up the microfiltration machine of the present invention, in order to make full use of the potential energy of the water flow, the component structure of the microfiltration machine and the position of the element addition dosing metering pump 9 should be located above the high-density breeding pond, and the drug delivery box connected to the element addition dosing metering pump 9 should be integrated with the above structure, and the drain outlet 6 of the sewage tank 4 is drained to other water filtration structures, so as to facilitate the farm staff to efficiently manage the water circulation purification structure of the high-density breeding pond.

[0054] Reference Figure 4 As shown, further, in order to adapt to the specifications of high-density breeding ponds, in situations where space saving is required, the filter cartridge 3 can increase its own "taper" - that is, on the basis of maintaining the upper and lower width difference, increase its own height - to form a long conical structure. Specifically, the taper range of the filter cartridge 3 is 1.5-0.25. The smaller the taper, the more suitable it is for installation in narrow occasions. The larger the taper, the more suitable it is for configuration in a suitable position in the space. Especially in the case of a small taper, the filter cartridge 3 can adapt to occasions with a narrower space diameter, and its own filtration flow rate will not be affected too much. When arranging the microfiltration machine described in the present invention, the farm can make adaptive settings based on the actual conditions of breeding of different sizes.

[0055] In summary, since the technical solution of the present invention is not limited to horizontal or vertical types, a simple microfiltration machine cannot well describe the technical idea of ​​the solution of the present invention. On the one hand, the present invention has several common basic structures, such as the outer box 1, sewage pipe 2, filter cartridge 3, sewage tank 4, clean water tank 5, drain outlet 6 and other structures. On the other hand, the horizontal and vertical layouts are obviously different, and users can combine the corresponding structural forms according to their needs. Therefore, the technical solution of the present invention has the elements of combination, so it is a better way to use a combination to define the present invention.

[0056] The technical solution disclosed in the present invention simplifies the transmission structure and drive structure for the electric drive drum or the automatic rotating microfiltration drum. Compared with the existing traditional technology, it cleverly utilizes the necessary pump power in the existing water circulation system, so that the microfiltration correction water system can continue the "filtration-cleaning-filtration" cycle without the need to set up a rotating motor. The overall structure is simple and clever but effective. The high-density aquaculture pond microfiltration system constructed in this way can greatly simplify the manufacturing difficulty of the microfiltration structure, and also significantly reduce the expenses required for production and manufacturing, especially the cost of purchasing and installing rotating motors. The composition of the vast majority of non-motor structures also reduces the equipment maintenance cost of the present invention. Therefore, no matter from what perspective, the technical solution of the present invention can cope well with high-density fish farming facilities of various sizes. It is an effective and popularizable technology that can greatly promote the improvement of high-density aquaculture productivity.

[0057] The above description is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A microfiltration machine, comprising an outer box (1) and a sewage pipe (2) connected from the outside to the outer box (1), characterized in that: The sewage pipe (2) is provided with a sewage outlet (20) after passing through the outer box (1) from the outside from the top to the bottom. The sewage outlet (20) is inclined relative to the vertical direction of the outer box (1); A filter cartridge (3) having one end wide and the other end narrow is rotatably connected in the outer box (1) between the sewage outlet (20) of the sewage pipe (2) and the outer box (1). The filter cartridge (3) is arranged vertically or horizontally. The end of the filter cartridge (3) with a higher water level is hinged to the outer box (1) through a movable bearing (35), while the end with a lower water level is hinged to the outer box (1) through a rotating shaft (32). The sewage outlet (20) passes through the movable bearing (35) from the end of the filter cartridge (3) with a higher water level and enters the inner cavity of the filter cartridge (3), so that the sewage jet ejected from the sewage outlet (20) of the sewage pipe (2) contacts the inner wall of the filter cartridge (3), and the impact force of the sewage jet pushes the filter cartridge (3) to rotate around the hinge of the filter cartridge (3). A clean water tank (5) and a sewage tank (4) are provided in the outer box body (1), and the sewage tank (4), the clean water tank (5) and the filter cartridge (3) are all in the same space. A partition is provided between the sewage tank (4) and the clean water tank (5) surrounding the low water level end of the filter cartridge (3). The filter cartridge (3) is provided with a plurality of filter ports (30) on the side wall. The filter ports (30) are all embedded with microfilters (31). A circle of sewage drain ports (34) is provided around the lowest water level of the filter cartridge (3). The sewage drain port (34) is communicated with the sewage tank (4). The space between the outside of the sewage tank (4) and the inside of the outer box body (1) is set as the clean water tank (5). The clean water tank (5) and the sewage tank (4) are both independently provided with drainage ports (6). At least one circulation pump (7) is connected to the clean water tank (5), and the water outlet of the circulation pump (7) is connected to at least one set of backflushing nozzles (8) that spray toward the filter cartridge (3).

2. The microfiltration machine according to claim 1, characterized in that When the filter cartridge (3) is in a vertical layout, the sewage pipe (2) extends from the top of the filter cartridge (3) into the filter cartridge (3), and the number of the sewage outlets (20) is ≥1. The top of the filter cartridge (3) is movably connected to the outer box (1) through a movable bearing (35). The center of the bottom end of the filter cartridge (3) is recessed inward, and the center of the recess is movably connected to the bottom of the sewage tank (4) through a fixedly connected rotating shaft (32) and a waterproof bearing (33) fitted outside the rotating shaft (32), so that a rotating pair is formed between the rotating shaft (32) and the waterproof bearing (33). The sewage outlet (34) is arranged at the lowest position of the filter cartridge (3) around the rotating shaft (32), and the sewage outlet (34) extends deep into the sewage tank (4).

3. The microfiltration machine according to claim 2, characterized in that: The sewage tank (4) is formed by at least a circle of box side panels (40) fixed to the bottom of the outer box body (1) and a box top panel (42) covering the top of all the box side panels (41), the box top panel (42) being connected together. A sewage tank opening (40) is provided on the box top panel (42) for the bottom of the filter cartridge (3) to pass through. A retaining edge (43) surrounding the sewage tank opening (40) is provided. The actual separation between the sewage tank (4) and the clean water tank (5) is formed by the box top panel (42), the box side panels (40) and the retaining edge (43). The height of the retaining edge (43) is higher than the opening height of the sewage outlet (34).

4. The microfiltration machine according to claim 1, characterized in that When the filter cartridge (3) is in a horizontal layout, its rotation axis remains horizontal; one end in the longitudinal direction has a narrower inner diameter to form a high water level, and is hinged to the inner wall of the clean water tank (5) through a movable bearing (35); the other end in the longitudinal direction has a wider inner diameter to form a low water level, and is hinged to the inner wall of the sewage tank (4) through a bearing; after the sewage pipe (2) passes into the inner cavity of the filter cartridge (3) from the end at the high water level, the sewage outlet (20) is arranged obliquely downward, and the number of the sewage outlets (20) is ≥1; the sewage outlet (34) is opened on the inner wall of the end at the low water level of the filter cartridge (3), and exists independently of the area of ​​the microfilter (31).

5. The microfiltration machine according to claim 4, characterized in that: The sewage tank (4) and the clean water tank (5) are separated by a tank side plate (41), and a circular opening is provided on the tank side plate (41) for the low water level end of the filter cartridge (3) to pass through. The filter cartridge (3) has only a sewage outlet (34) for sewage to pass through in the sewage tank (4) area, and no other openings for water to pass through.

6. The microfiltration machine according to claim 1, characterized in that: The diameter of the sewage outlet (20) ranges from 30 mm to 400 mm.

7. The microfiltration machine according to claim 1, characterized in that: The mesh size of the microfilter (31) is 400-2000 mesh, and the microfilter (31) at the lowest water level of the filter cartridge (3) is 10 cm-40 cm higher than the sewage outlet (34) of the filter cartridge (3).

8. The microfiltration machine according to claim 1, characterized in that: The bottom edge of the clean water tank (5) is provided with a UV irradiation lamp (51) irradiating toward the center of the clean water tank (5), a waterproof seal is formed between the UV irradiation lamp (51) and the clean water tank, and the number of groups of the UV irradiation lamps (51) is greater than or equal to (1).

9. The microfiltration machine according to claim 1, characterized in that: The taper range of the filter cartridge (3) is 1.5-0.

25.

10. The microfiltration machine according to claim 1, characterized in that: The clean water tank (5) is further provided with a medicine delivery port (50) which is communicated with the inside and outside. The medicine delivery port (50) is connected to a medicine metering pump (9), and the medicine metering pump (9) is connected to an ecological additive storage tank.

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