CN217418350U

CN217418350U - Micro-filter

Info

Publication number: CN217418350U
Application number: CN202220738658.2U
Authority: CN
Inventors: 杨飞; 文畅; 潘国英; 黄薇薇; 姚雪梅; 周梅阳
Original assignee: Hainan University
Current assignee: Hainan University
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-09-13
Anticipated expiration: 2032-03-31

Abstract

The utility model discloses a micro-filter. Comprises a box body, a filtering rotary barrel, a back washing mechanism, a driving piece, a collector, a water inlet pipe and a baffle plate. The baffle plate divides the interior of the box body into a filtering area and a sewage discharging area, one end of the filtering rotary barrel is closed, the other end of the filtering rotary barrel is open, and the open end of the filtering rotary barrel is communicated with the sewage discharging area; the water inlet on the box body is provided with a water inlet pipe which extends into the interior of the filtering rotary barrel from the open end of the filtering rotary barrel, and the distance between the water outlet end of the water inlet pipe and the closed end of the filtering rotary barrel is less than half of the length of the filtering rotary barrel. The blind end that changes the bucket is being filtered in inlet tube spun rivers, and the impact blind end produces thrust and makes rivers backward flow, drives particulate matter such as fish excrement and filters the open end that changes the bucket along with the water flow direction and flows, and then flows into the collector and has effectively avoided particulate matter such as fish excrement to block up the filter screen, and the particulate matter such as fish excrement that is washed down by backwash mechanism towards the filter screen internal surface in addition is difficult for being smashed to great graininess attitude deposits in the bottom of collector, more is favorable to collecting and separation emission.

Description

Micro-filter

Technical Field

The utility model relates to a water treatment technical field especially relates to a microstrainer.

Background

The aquaculture can provide a high-quality food source, is the food industry growing fastest in the world, the traditional aquaculture mode is relatively extensive, the industrial degree is low, particularly, the water and nutrition are not recycled enough, the eutrophication of surrounding water areas is often caused, the negative influence is brought to the ecological environment, and the sustainable development of the aquaculture industry is severely restricted. The industrial recirculating aquaculture system adopts certain engineering facilities and circulating water treatment facilities, realizes the recycling of culture water after proper biochemical treatment, and achieves high yield, high efficiency, high quality and near zero discharge. However, the water treatment of the industrial high-density recirculating aquaculture faces two major problems, namely the negative influence of the pH value reduction caused by the solid-liquid separation of the fish feces and the carbon dioxide generated by the fish respiration.

The rotary drum type micro-filter is used as a main device for solid-liquid separation in aquaculture, is divided into two spaces of a water inlet side and a water outlet side by a filter screen, and realizes automatic control and intermittent operation in operation, thereby greatly reducing energy consumption. However, the common drum microfilters on the market have several problems: (1) the filtering area is low, generally about 30% of the rotary drum, so that the utilization rate of the filtering area is low, and the volume of the whole machine is large; (2) the rotary drum is partially immersed in water and can be eccentric when rotating, so that the motor driving power consumption is large, and the rotary drum is easy to deform and damage; (3) after the particles such as fish dung and the like entering the rotary drum along with the circulating water flow are intercepted on the inner surface of the filter screen, the particles are brought to the upper part along with the surface and the inner edge strip by the rotation of the rotary drum, and then fall into the sewage draining groove along with the water flow to be drained under the washing of the pressure backwashing water. The working mode has low efficiency, only a small part of particles accurately fall into the sewage discharge groove to be discharged, and most of the particles are flushed back into the rotary drum by high-pressure water flow; (4) when the large-particle fish manure is flushed to the sewage discharge tank by high-pressure water flow, the large-particle fish manure is broken into fine particles, and the fine particles can more easily pass through the filter screen and enter a subsequent flow, so that the filtering efficiency is further reduced; (5) the filter screen is easy to block during high-density culture, frequent back washing and even manual cleaning are needed, so that the energy consumption is increased, and the management is troublesome; (6) the fish dung which cannot be discharged from the sewage discharge groove and cannot pass through the filter screen does not have a proper outlet, and can stay in the water inlet side for a long time and be gradually dissolved to aggravate water quality pollution.

Disclosure of Invention

An object of the utility model is to provide a microstrainer to the aforesaid not enough of prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a micro-filter comprises a box body, a filtering rotary barrel, a back washing mechanism and a driving piece, wherein the filtering rotary barrel is rotatably arranged in the box body, the driving piece is rotatably connected with the filtering rotary barrel to drive the filtering rotary barrel to rotate, the back washing mechanism is arranged obliquely above the filtering rotary barrel, a baffle is vertically arranged in the box body to divide the inner space of the box body into a filtering area and a sewage discharge area; the filtering rotating barrel is positioned in the filtering area, one end of the filtering rotating barrel is closed and can be rotatably arranged on the inner wall of the box body, the other end of the filtering rotating barrel is open and can be rotatably arranged on the baffle plate, a filtering net covers the barrel body of the filtering rotating barrel, and the open end of the filtering rotating barrel is communicated with the sewage draining area; the sewage discharge area is provided with a collector; the top end of the collector is open, and the top end of the collector is positioned below the open end of the filtering rotary barrel; the box body is provided with a water inlet and a water outlet; the water outlet is communicated with the filtering area and is positioned below the filtering rotary barrel; the water inlet is provided with a water inlet pipe; the inlet tube by the open end that filters the commentaries on classics bucket stretches into the inside of filtering the commentaries on classics bucket, just the play water end of inlet tube with the distance between the blind end of filtering the commentaries on classics bucket is less than half filter commentaries on classics bucket length.

Furthermore, the distance between the water outlet end of the water inlet pipe and the closed end of the filtering rotary barrel is 1 time of the pipe diameter of the water inlet pipe.

Further, a pH buffer layer is arranged at the bottom of the filtering area; and an aerator pipe is arranged above the pH buffer layer and is arranged below the filtering rotary barrel.

Furthermore, the aeration pipe is a porous pipe, and the size of the aeration aperture is 0.5-5 mm.

Further, the back washing mechanism comprises a water spraying pipe and a high-pressure water pump; the spray pipe is provided with a plurality of detachable universal nozzles at intervals, and the spray pipe is provided with a high-pressure water pump; and a stop valve is arranged at the water inlet of the high-pressure water pump.

Furthermore, a V-shaped water spraying diversion trench is arranged at the water outlet end of the spray head, the depth of the V-shaped water spraying diversion trench is 2-3 mm, and the length of the V-shaped water spraying diversion trench is 6-12 mm.

Furthermore, a drain outlet is formed in the bottom of the collector and provided with a drain pipeline, a drain pipe valve is arranged on the drain pipeline, the collector is funnel-shaped, and the gradient of the collector is 50-60 degrees.

Further, the driving part comprises a motor, and the motor is arranged outside the box body; a rotating shaft is arranged at the central shaft position of the closed end of the filtering rotary barrel, and penetrates through the box body to be in transmission connection with the motor; the top of the baffle is provided with a groove for hanging the open end of the filtering rotary barrel, and the groove is provided with a rotatable lug; the open end of the filtering rotary barrel is rotatably fixed on the groove through the convex block; the filtering rotary barrel is tightly and rotatably connected with the groove.

Furthermore, a water level sensor is arranged in the sewage draining area, the position height of the water level sensor is lower than that of the baffle, and the position height of the water level sensor is higher than that of the water inlet pipe.

Furthermore, the microstrainer further comprises a controller, wherein the controller is electrically connected with the motor, the high-pressure water pump and the water level sensor respectively, and the motor and the high-pressure water pump are controlled to be turned on and off through the water level sensor.

The utility model has the advantages that:

(1) the utility model discloses a microfilter is through the vertical baffle of establishing in the box bottom, separates its inner space for filtering area and blowdown district, filters to change the bucket and be located the filtering area and cover and have the filter screen, filters to change bucket one end and seal, and one end is uncovered, and the inlet tube is stretched into by the opening end of filtering to change the bucket and filters the inside of changeing the bucket, and the play water outlet end of inlet tube and the filtration of changeing the bucket between the blind end apart from being less than half filter and change bucket length. The water flow sprayed out of the water inlet pipe is made to hit the closed end of the filtering rotary barrel, the closed end is impacted to generate reverse thrust to enable the water flow to flow back, the particles such as fish dung and the like are driven to flow along with the water flow to the open end of the filtering rotary barrel, then flow into the collector and are effectively precipitated in the collector, the situation that the filter screen is blocked by the particles such as the fish dung and the like is effectively avoided, and the water in the barrel is smoothly filtered and flows out of the rotary barrel; meanwhile, a relatively static environment is provided for the fish manure collecting area, and the sedimentation of particulate matters is facilitated, and the separation and the discharge are facilitated.

(2) The utility model provides a microstrainer has removed the blowdown groove for prior art, has avoided beating garrulous fish feces because of assaulting too greatly, sees through the filter screen. The particles that are washed from the inner surface of the screen by the backwash water return to the water inside the bowl and eventually settle into the collector in a larger particulate form.

(3) The utility model discloses a microstrainer can guarantee to filter the filter screen that changes the bucket and keep clean and unblocked state in the longer time, is difficult for blockking up, improves the filter area of filter screen greatly, and then improves filtration efficiency to make to filter the buoyancy effect that changes the bucket and receive water and rotate easily, reducing wear and energy consumption. And the back flush requirement is low, is convenient for workers to collect and discharge fish dung, can achieve the aims of partially removing carbon dioxide and buffering the pH value, has the advantages of reducing energy consumption and manpower, and is simple to operate, reliable to operate and low in cost.

Drawings

FIG. 1 is a schematic view of the main structure of the micro-filter of the present invention;

fig. 2 is a cross-sectional view of the micro-filter of the present invention.

Illustration of the drawings:

1. a box body; 11. a water inlet; 12. a water outlet; 2. filtering and rotating the barrel; 22. a rotating shaft; 3. a backwashing mechanism; 31. a water spray pipe; 32. a spray head; 33. a high pressure water pump; 4. a drive member; 41. a motor; 5. a collector; 51. a sewage draining outlet; 52. a blowdown line; 53. a drain valve; 6. a water inlet pipe; 7. an aeration pipe; 8. a pH buffer layer; 9. a baffle plate; 91. a filtration zone; 92. a blowdown area; 93. a groove; 931. a bump; 94. a water level sensor; 10. and a controller.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, a micro-filter comprises a box body 1, a filtering rotary barrel 2, a back washing mechanism 3 and a driving piece 4, wherein the filtering rotary barrel 2 is rotatably arranged in the box body 1, the driving piece is rotatably connected with the filtering rotary barrel 2 to drive the filtering rotary barrel 2 to rotate, the back washing mechanism 3 is arranged obliquely above the filtering rotary barrel 2, and a baffle 9 is vertically arranged in the box body 1 to divide the inner space thereof into a filtering area 91 and a sewage discharge area 92; the filtering rotary barrel 2 is positioned in the filtering area 91, one end of the filtering rotary barrel 2 is closed, the filtering rotary barrel 2 is rotatably arranged on the inner wall of the box body 1, the other end of the filtering rotary barrel is open, the filtering rotary barrel 2 is rotatably arranged on the baffle 9, a filter screen covers the barrel body of the filtering rotary barrel 2, and the open end of the filtering rotary barrel 2 is communicated with the sewage draining area 92; the sewage discharge area 92 is provided with a collector 5; the top end of the collector 5 is open, and the top end of the collector 5 is positioned below the open end of the filtering rotary barrel 2; the box body 1 is provided with a water inlet 11 and a water outlet 12; the water outlet 12 is communicated with the filtering area 91 and is positioned below the filtering rotary barrel 2; the water inlet 11 is provided with a water inlet pipe 6; the water inlet pipe 6 extends into the interior of the filtering rotary barrel 2 from the open end of the filtering rotary barrel 2, and the distance between the water outlet end of the water inlet pipe 6 and the closed end of the filtering rotary barrel 2 is less than half of the length of the filtering rotary barrel 2. Beat at the blind end that filters commentaries on classics bucket 2 through 6 spun rivers of inlet tube, the impact blind end produces thrust and makes the rivers backward flow, it flows to drive particulate matters such as fish manure along with the open end that the rivers flow to filter commentaries on classics bucket, and then flow in the collector, and effectively deposit in the collector, particulate matters such as fish manure have effectively been avoided blockking up the filter screen, and by particulate matters such as the fish manure that washing away filter screen internal surface was washed away by back flush mechanism is difficult for being smashed, deposit in the bottom of collector with great graininess attitude, more be favorable to collecting and separating the emission. The utility model discloses a microstrainer can guarantee to filter the filter screen that changes the bucket and keep clean and unblocked state in the longer time, is difficult for blockking up, improves the filter area of filter screen greatly, and then improves filtration efficiency to make and filter the buoyancy effect that changes the bucket and receive water and rotate easily, reduce wear and energy consumption. And the backwashing requirement is low, the fish manure is convenient for workers to collect and discharge, the purposes of partially removing carbon dioxide and supplementing pH value can be achieved, the advantages of reducing energy consumption and manpower are achieved, the operation is simple, the operation is reliable, and the cost is low.

In order to ensure that the impact on the closed end generates reverse thrust to ensure that the reverse thrust of water flow backflow is large enough, the distance between the water outlet end of the water inlet pipe 6 and the closed end of the filtering rotary barrel 2 can be set to be 1 time of the pipe diameter of the water inlet pipe 6.

In order to realize the utility model discloses a microstrainer can the efficient be applied to high density aquaculture, can also set up pH buffer layer 8 in its filtering area 91 bottom. Through the pH buffer layer, can provide the basicity and alleviate the negative effects that the pH value that carbon dioxide caused descends and bring, indirectly improve the effect of getting rid of carbon dioxide, further improve water quality of water, guarantee follow-up biochemical system and move under good environment, make processing system move more high-efficiently.

In order to ensure the water quality of the high-density circulating aquaculture, the pH buffer layer 8 can also be a limestone particle layer with the particle size of 5-100 mm, and limestone particles with the particle size of 30-80mm are adopted in the embodiment. Limestone particles can be slowly dissolved in water, alkalinity is provided to relieve negative effects caused by pH value reduction caused by carbon dioxide, the removal effect of the carbon dioxide is indirectly improved, and the biochemical process is ensured to operate under good environmental conditions.

Further, an aeration pipe 7 can be arranged above the pH buffer layer 8, and the aeration pipe 7 is arranged below the filtering rotary barrel 2. When the bubbles produced by the aeration pipe 7 move upwards, the rising air flow is provided to drive the particles such as fish dung and the like to move to the collector 5, so that the particles such as the fish dung and the like are ensured not to block the filter screen again; and meanwhile, part of carbon dioxide in the water body can be removed.

In order to guarantee that the filter screen is not blockked up, aeration pipe 7 can be the perforated pipe, and aeration aperture size is 0.5~5mm, and the aeration hole of 2mm is adopted to this embodiment, and aeration pipe material is the PVC pipe of 25mm diameter. The aeration pipe not only can provide updraft and rivers and reach the purpose that the carbon dioxide is driven away in part, can also mix the water and continuously wash filtering rotary barrel 2, and particulate matters such as fish dung can also be helped to order about to fish dung collector motion to its produced rivers, guarantees that the filter screen does not block up to greatly reduced back flush's requirement reduces the energy consumption.

The structure of the back washing mechanism 3 of the utility model has various structures, which is not limited here. In order to ensure that the filter screen of the filtering rotary barrel is uniformly and comprehensively washed, in this embodiment, the backwashing mechanism 3 may include a water spraying pipe 31 and a high-pressure water pump 33, the water spraying pipe 31 is provided with a plurality of detachable universal nozzles 32 at intervals, the water spraying pipe 31 is provided with the high-pressure water pump 33, and a water inlet of the high-pressure water pump 33 is provided with a stop valve. Each spray head 32 can be detached for washing, a spherical adjustable device can be arranged at the front end of each spray head 32, the number and the spacing of the spray heads 32 can be reasonably set according to the condition of a filtering water source, and the back washing capacity can be reasonably adjusted; the spherical adjustable device of each spray head 32 can adjust the washing direction and angle of the spray head 32, so that the whole filter screen is uniformly and comprehensively washed.

In order to improve the back washing efficiency, the water outlet end of the nozzle 32 can be provided with a V-shaped water spraying diversion trench, the depth of the V-shaped water spraying diversion trench is 2 mm-3 mm, the length of the V-shaped water spraying diversion trench is 6-12mm, and a relatively long fan-shaped washing water flow can be provided, so that the back washing efficiency is improved.

The collector 5 may have various structures, and is not limited thereto. In order to ensure that the deposited particles such as fish dung and the like are discharged in time, the bottom of the collector 5 is provided with a sewage outlet 51, the sewage outlet 51 is provided with a sewage pipeline 52, and the sewage pipeline 52 is provided with a discharge pipe valve 53. The collector 5 of the embodiment is formed by welding PP plates with the thickness of 10 mm; the bottom of the collector is provided with a sewer line 52 and a drain valve 53. The fish feces collected are discharged regularly through the water pump controlled regularly, so that the fish feces are prevented from staying in the barrel for a long time. In order to facilitate the precipitation and collection of particles such as fish droppings, the collector 5 is funnel-shaped and has a slope of 50-60 °.

The structure of the driving member 4 is various and is not limited herein. In order to ensure the stable operation of the filtering rotary barrel, in this embodiment, the driving member 4 may include a motor 41, the motor 41 is disposed outside the box body 1, a rotating shaft 22 is disposed at a central axis position of the closed end of the filtering rotary barrel 2, and the rotating shaft 22 penetrates through the box body 1 and is in transmission connection with the motor 41; the top of the baffle 9 is provided with a groove 93 for suspending the open end of the filtering rotary barrel 2, the groove 93 is provided with a rotatable projection 931, and the open end of the filtering rotary barrel 2 is rotatably fixed on the groove 93 through the projection 931. The filtering rotary barrel 2 drives the filter residue to move in the rotating process, so that the washing is convenient, the power is low, and the energy consumption is low.

In order to control the operation of the filter rotary barrel and improve the working efficiency of the micro-filter, a water level sensor 94 can be further arranged in the sewage discharge area 92, the position height of the water level sensor 94 is lower than the height of the baffle 9, and the position height of the water level sensor 94 is higher than the height of the water inlet pipe 6. That is, when the filtering rotary tub is clogged, the flow rate of the water passing through the filter net is greatly reduced, thereby causing the water level of the sewage discharging area (water inlet side) to rise, and the probe of the water level sensor 94 is lifted and sends a signal to turn on the backwashing mode. And the working water level can also be controlled through the height that the microstrainer was placed, has guaranteed that it can mostly soak in the aquatic operation to filter rotary barrel 2 to improve the filter area of filter screen greatly, and then improve filtration efficiency, and filter rotary barrel 2 receives the buoyancy of water and rotates easily, reduce wear and energy consumption. The water level sensor 94 automatically controls the operation of the filtering rotary barrel 2 and ensures that it can be operated intermittently.

In order to prolong the service life of the filtering rotary barrel 2 and save energy, the micro-filter can further comprise a controller 10, the controller 10 is respectively electrically connected with the motor 41, the high-pressure water pump 33 and the water level sensor 94, and the opening and closing of the motor 41 and the high-pressure water pump 33 are controlled by the water level sensor 94. The controller 10 can be set in two modes, one mode is a manual mode, namely, the rotation of the filtering rotary barrel 2 and the start and stop of the high-pressure water pump 33 are controlled by manual judgment; the other is an automatic mode, and the rotation of the filter rotary barrel 2 and the start and stop of the high-pressure water pump 33 are automatically controlled according to the signal feedback of the water level sensor 94.

When the micro-filter in the embodiment works, the filtering rotary barrel 2 and the back washing mechanism 3 are both in a static state. Water of the culture system enters the water inlet pipe 6 from the water inlet 11, is sprayed out from the water outlet end of the water inlet pipe 6 and generates reverse water flow through the backflushing action of the inner wall of the rotary drum to flow to the opening of the rotary drum, and particles such as fish manure are driven to be concentrated in the sewage discharge area and are deposited at the lower part of the collector, so that the fish manure is easy to separate and discharge. A small amount of particles can stay in the filtering rotary barrel 2, the particles are intercepted on the filter screen after water flow filtering, and the filtered water finally flows out through the water outlet 12 and enters the culture pond again for recycling after being purified by a subsequent biochemical system.

When the filter screen of the filter rotating barrel 2 is blocked, the water level of the sewage discharge area 92 rises, and reaches the height of the probe of the water level sensor 94, the probe rises and sends a control signal back to the controller, the motor 41 and the high-pressure water pump 33 are started at the same time, the filter rotating barrel 2 is driven to rotate, and the filter screen of the filter rotating barrel 2 is backwashed; when the filter screen is unblocked due to the rotation of the filter rotary barrel 2 and the back washing, the filter area of the filter screen is increased, the water level of the sewage draining area 92 is reduced and is lower than the lower limit height of the probe of the water level sensor 94, the control signal is cut off, the motor 41 and the high pressure water pump 33 stop working, the micro-filter returns to the normal static working state, and the operation is repeated in this way.

The above is not relevant and is applicable to the prior art.

Although certain specific embodiments of the present invention have been described in detail by way of illustration, it will be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention, which is to be construed as broadly as the present invention will suggest themselves to those skilled in the art to which the invention pertains and which is susceptible to various modifications or additions and similar arrangements to the specific embodiments described herein without departing from the scope of the invention as defined in the appended claims. It should be understood by those skilled in the art that any modifications, equivalent substitutions, improvements and the like made to the above embodiments according to the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a microstrainer, includes box (1), filters and changes bucket (2), back flush mechanism (3) and driving piece (4), the rotatable setting of filtration commentaries on classics bucket (2) is in box (1), the driving piece with it changes bucket (2) to filter to rotate to be connected, in order to drive it changes bucket (2) to filter to rotate, back flush mechanism (3) set up filter the oblique top of changeing bucket (2), its characterized in that: a baffle (9) is vertically arranged in the box body (1) to divide the inner space of the box body into a filtering area (91) and a sewage draining area (92); the filtering rotary barrel (2) is positioned in the filtering area (91), one end of the filtering rotary barrel (2) is closed and can be rotatably arranged on the inner wall of the box body (1), the other end of the filtering rotary barrel is open and can be rotatably arranged on the baffle (9), a filter screen covers the barrel body of the filtering rotary barrel (2), and the open end of the filtering rotary barrel (2) is communicated with the sewage discharge area (92); the sewage discharge area (92) is provided with a collector (5); the top end of the collector (5) is open, and the top end of the collector (5) is positioned below the open end of the filtering rotary barrel (2); the box body (1) is provided with a water inlet (11) and a water outlet (12); the water outlet (12) is communicated with the filtering area (91) and is positioned below the filtering rotary barrel (2); the water inlet (11) is provided with a water inlet pipe (6); the inlet tube (6) by the open end of filtering commentaries on classics bucket (2) stretches into the inside of filtering commentaries on classics bucket (2), just the play water end of inlet tube (6) with the distance between the blind end of filtering commentaries on classics bucket (2) is less than half filter commentaries on classics bucket (2) length.

2. A micro-filter as claimed in claim 1, characterized in that the distance between the outlet end of the inlet pipe (6) and the closed end of the filter drum (2) is 1 times the pipe diameter of the inlet pipe (6).

3. A microfilter machine as in claim 1, wherein the bottom of the filtering zone (91) is provided with a pH buffer layer (8); an aerator pipe (7) is arranged above the pH buffer layer (8), and the aerator pipe (7) is arranged below the filtering rotary barrel (2).

4. A micro-filter according to claim 3, characterized in that the aeration pipe (7) is a perforated pipe, and the size of the aeration hole is 0.5-5 mm.

5. A microfilter as claimed in claim 1, characterised in that said backwashing means (3) comprise a water jet (31) and a high-pressure water pump (33); a plurality of detachable universal nozzles (32) are arranged on the water spray pipe (31) at intervals, and a high-pressure water pump (33) is arranged on the water spray pipe (31); and a stop valve is arranged at the water inlet of the high-pressure water pump (33).

6. The micro-filter of claim 5, wherein the water outlet end of the nozzle (32) is provided with a V-shaped water spray guiding groove with a depth of 2mm to 3mm and a length of 6 mm to 12 mm.

7. A microfilter machine as in claim 1, wherein said collector (5) is provided with a drain (51) at the bottom, said drain (51) being provided with a drain (52), said drain (52) being provided with a drain valve (53), said collector (5) being funnel-shaped with a slope of 50 ^o ～60 ^o 。

8. A microfilter machine as claimed in claim 5, characterised in that said drive member (4) comprises an electric motor (41), said electric motor (41) being arranged outside said casing (1); a rotating shaft (22) is arranged at the central shaft position of the closed end of the filtering rotary barrel (2), and the rotating shaft (22) penetrates through the box body (1) to be in transmission connection with the motor (41); the top of the baffle (9) is provided with a groove (93) for hanging the open end of the filtering rotary barrel (2), and the groove (93) is provided with a rotatable bump (931); the open end of the filtering rotary barrel (2) is rotatably fixed on the groove (93) through the lug (931); the filtering rotary barrel (2) is tightly and rotatably connected with the groove (93).

9. A microfilter machine as claimed in claim 8, characterized in that a level sensor (94) is arranged in said drainage area (92), said level sensor (94) being positioned at a level lower than the level of said baffle (9) and said level sensor (94) being positioned at a level higher than the level of said inlet pipe (6).

10. The microfilter of claim 9, further comprising a controller (10), said controller (10) being electrically connected to said motor (41), said high pressure water pump (33) and said water level sensor (94), respectively, said water level sensor (94) automatically controlling the opening and closing of said motor (41) and said high pressure water pump (33) by said water level sensor (94).