CN113321328A

CN113321328A - Precipitation device based on milipore filter

Info

Publication number: CN113321328A
Application number: CN202110445537.9A
Authority: CN
Inventors: 赵丽; 金兰; 王晓丽
Original assignee: Beijing Shuiyan Environmental Technology Co ltd
Current assignee: Beijing Shuiyan Environmental Technology Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-08-31
Anticipated expiration: 2041-04-23
Also published as: CN113321328B

Abstract

The invention discloses a sedimentation device based on an ultrafiltration membrane, which comprises a sedimentation tank with an opening at the top, wherein a plurality of sedimentation membrane groups capable of being quickly disassembled are arranged right below the bottom of the sedimentation tank, the sedimentation membrane groups sequentially comprise a filter membrane cylinder, the ultrafiltration membrane and a shaping frame from outside to inside, a quick-assembling cover sleeved with the filter membrane cylinder is arranged at the bottom end of the sedimentation tank, a concentrated liquid pipe is communicated with the bottom end of the filter membrane cylinder, a filter liquid pipe is communicated with one side of the bottom of the filter membrane cylinder, the ultrafiltration membrane is of a cylindrical structure with an opening at the top end, and a plurality of necking openings are arranged at intervals in the middle of the ultrafiltration membrane. According to the invention, the large-volume settling tank is arranged for storing sewage, and the bottom of the settling tank is communicated with the plurality of settling membrane groups provided with the rotatable ultrafiltration membranes, so that the sewage can permeate the ultrafiltration membranes to obtain filtered and separated water molecules and concentrated liquid by taking the weight of the sewage as pressure and adding the rotating force of the ultrafiltration membranes, the investment and use cost is effectively reduced, and the popularization is facilitated.

Description

Precipitation device based on milipore filter

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a sedimentation device based on an ultrafiltration membrane.

Background

The ultrafiltration membrane is a polymeric semipermeable membrane with a membrane aperture of 1-100 nm and is prepared from cellulose acetate, cellulose acetate esters, polyethylene and the like. It uses pressure as driving force to separate the macromolecule colloid or suspended particles with a certain size from the solution. In the existing primary treatment of sewage, an ultrafiltration membrane is introduced for filtration and precipitation, and the strong capability of the ultrafiltration membrane for filtering and separating water molecules is utilized. However, the high-power water pump is required to pump sewage to separate water molecules from the concentrated solution of the original sewage through the ultrafiltration membrane, and the cost of the high-power water pump and the cost of electricity consumption are both high, so that the high-power water pump is not beneficial to popularization and use.

Disclosure of Invention

The invention aims to provide a sedimentation device based on an ultrafiltration membrane, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides a sedimentation device based on an ultrafiltration membrane, which comprises a sedimentation tank with an opening at the top, wherein a plurality of sedimentation membrane groups capable of being quickly disassembled are arranged under the bottom of the sedimentation tank, the sedimentation membrane groups sequentially comprise a filter membrane cylinder, an ultrafiltration membrane and a shaping frame from outside to inside, a quick-mounting cover sleeved with the filter membrane cylinder is arranged at the bottom end of the sedimentation tank, a concentrated liquid pipe is communicated with the bottom end of the filter membrane cylinder, a filter liquid pipe is communicated with one side of the bottom of the filter membrane cylinder, the ultrafiltration membrane is of a cylindrical structure with an opening at the top end, a plurality of necking ports are arranged at intervals in the middle of the ultrafiltration membrane, a liquid discharge port is communicated with the bottom end of the ultrafiltration membrane, the outer diameter of the ultrafiltration membrane is smaller than the inner diameter of the filter membrane cylinder, and sealing rings and sealing discs used for sealing the upper end and the lower end of the filter membrane cylinder are respectively bonded at the upper end and the lower end of the ultrafiltration membrane;

a spinning membrane group is arranged above the filter membrane cylinder and inside the settling tank, a settling port is formed in the bottom of the settling tank and right above the quick-mounting cover, and the spinning membrane group comprises a worm wheel and a servo motor, wherein the worm wheel is positioned on the settling port and can drive the ultrafiltration membrane to rotate;

the drainage plate has been placed to the top internal slope of setting tank, the top surface equidistant of drainage plate is equipped with a plurality of mud boards that hinder, the height that hinders the mud board is the trend that increases gradually from the high-end to the low side direction of drainage plate, the low side of drainage plate is provided with the filter screen.

As a further improvement of the technical scheme, the bottom side of the fast-assembling cover is in an annular shape and is provided with a plurality of clamping grooves at equal intervals, the clamping grooves are in a 7-shaped shape, the extending ends of the horizontal sections are provided with limiting grooves, the width of each limiting groove is larger than that of each clamping groove, and the outer side of the top of the filter membrane cylinder is provided with clamping blocks which are correspondingly clamped with the clamping grooves.

As a further improvement of the technical scheme, the inner wall of the fast-assembling cover is provided with an annular limiting table, the top end of the filter membrane cylinder is bonded with a sealing ring, and the thickness of the sealing ring is larger than the distance between the filter membrane cylinder and the limiting table.

As a further improvement of the technical scheme, the top surface of the sealing ring is symmetrically provided with convex rods, the top surface of the worm wheel is provided with slots correspondingly spliced with the convex rods, and the bottom surface of the worm wheel is bonded with a ferrule which is sleeved with the fast-assembly cover and can rotate.

As a further improvement of the technical scheme, the servo motor is arranged on the outer side of the bottom of the settling box, the output shaft of the servo motor penetrates through two side ends of the settling box, and the output shaft of the servo motor is coaxially connected with a worm which is correspondingly meshed with the worm wheel.

As a further improvement of the technical scheme, the shaping frame is matched with the large-caliber part of the ultrafiltration membrane in a sleeved mode, the neck fixing ring is sleeved at the neck reducing part, and the shaping frame and the central shaft of the neck fixing ring are provided with the shaping shafts which are connected in series.

As a further improvement of the technical scheme, the bottom of the settling tank is provided with a shrinking bottom with an inner width gradually reduced downwards, the inner wall of the top of the settling tank is provided with a plurality of supporting plates, and one end of the top of the settling tank is communicated with a water filling port and a backflow port.

As a further improvement of the technical scheme, a water leakage port is formed in the lower end of the mud blocking plate, and a filter screen frame clamped with the water leakage port is bonded to the edge of the filter screen.

As a further improvement of the technical scheme, the below of the precipitation membrane group is provided with a backflow group, the backflow group comprises a water suction pipe arranged below the filter membrane cylinder, a water suction pump installed at one end of the water suction pipe and a water discharge pipe installed above the water discharge end of the water suction pump, the top of the water suction pipe is communicated with a branch pipe which is correspondingly sleeved with a concentrated liquid pipe, and the top end of the water discharge pipe is in plug-in fit with the backflow port.

As the further improvement of this technical scheme, the axial both ends of drinking-water pipe all are provided with elasticity and prop the pipe, the top that elasticity propped the pipe is equipped with the lantern ring that cup joints with the drinking-water pipe, the inside that elasticity propped the pipe has cup jointed the spring in proper order and has propped the post, elasticity props the pipe and props the slip stroke of post and be greater than the height of managing separately.

Compared with the prior art, the invention has the beneficial effects that:

1. in this sediment device based on milipore filter, be used for storing sewage through the setting up bulky setting tank to a plurality of sediment membrane groups of built-in rotatable milipore filter are installed in the bottom intercommunication of setting tank, thereby utilize the weight of sewage self as pressure, in addition the revolving force of milipore filter, make sewage permeate the milipore filter and obtain filtering separation water molecules and dense solution, its effectual reduction drops the cost of input and use, does benefit to and popularizes.

2. In this sediment device based on milipore filter, through designing into the stacked structure of a plurality of funnels with the milipore filter, do benefit to sewage and stop and fully obtain filterable time to the outside through the milipore filter is sealed again and is provided with a filter membrane section of thick bamboo for save the hydrone, thereby does benefit to separately collect hydrone and dense solution, has practical value.

3. In this sediment device based on milipore filter, design into rotatory joint formula through the fast-assembling cover with a filtration membrane section of thick bamboo and setting tank bottom, do benefit to the quick assembly disassembly who deposits the membrane group, be convenient for change and clearance milipore filter.

4. In this sediment device based on milipore filter, through having set up the drainage plate at the top of setting up of setting tank, utilize the mud board and the filter screen separation of hindering of its top surface to fall big particulate matter to reduce the filtration burden of sewage to the milipore filter, do benefit to the life who prolongs the milipore filter.

Drawings

FIG. 1 is a schematic view of the entire structure of embodiment 1;

FIG. 2 is a schematic structural view of the bottom of the settling tank in example 1;

FIG. 3 is an enlarged view of the structure at A in example 2;

FIG. 4 is a full sectional view of the settling tank of example 1;

FIG. 5 is an exploded view of the flow guide plate of example 1;

FIG. 6 is a schematic diagram of the assembly structure of the precipitation membrane module, the spinning membrane module and the reflow module in example 1;

FIG. 7 is a schematic view of the assembly structure of the precipitated membrane module of example 1;

FIG. 8 is a partially disassembled view of the set of precipitation membranes of example 1;

FIG. 9 is a schematic view showing the structure of the filter cartridge of example 1;

FIG. 10 is a schematic view of the structure of an ultrafiltration membrane according to example 1;

FIG. 11 is a full sectional view of an ultrafiltration membrane according to example 1;

FIG. 12 is a schematic structural view of a setting frame according to embodiment 1;

FIG. 13 is a disassembled view of the spin film stack of example 1;

FIG. 14 is a schematic view of the reflow block configuration of example 1;

fig. 15 is an exploded view of the elastic stay tube according to example 1.

The various reference numbers in the figures mean:

100. a settling tank; 101. shrinking the bottom; 102. a precipitation port; 103. a support plate; 104. a water injection port; 105. a return port;

110. a drainage plate; 111. a mud blocking plate; 112. a water leakage port; 120. filtering with a screen; 121. a screen frame;

130. fast mounting cover; 131. a card slot; 132. a limiting groove; 133. a limiting table;

200. precipitating a membrane group;

210. a filter membrane cartridge; 211. a concentrate tube; 212. a filtrate pipe; 213. a clamping block; 214. a seal ring;

220. ultrafiltration membranes; 221. necking down; 222. a liquid discharge port; 223. sealing a ring; 224. a nose bar; 225. sealing the disc;

230. shaping frames; 231. a neck strap is fixed; 232. a sizing shaft;

300. a spinning membrane group; 310. a servo motor; 320. a worm; 330. a worm gear; 331. a slot; 332. a ferrule;

400. a reflux group; 410. a water pump; 420. a water pumping pipe; 421. pipe distribution; 430. a drain pipe;

440. an elastic stay tube; 441. a collar; 442. bracing columns; 443. a spring;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central axis", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Example 1

Referring to fig. 1 to 15, the present invention provides a sedimentation device based on an ultrafiltration membrane, which includes a sedimentation tank 100 with an open top, and a plurality of sedimentation membrane sets 200 capable of being quickly disassembled are disposed right below the bottom of the sedimentation tank 100, and the quick disassembly facilitates replacement and maintenance of the ultrafiltration membrane therein. The precipitation membrane group 200 comprises a filter membrane cylinder 210, an ultrafiltration membrane 220 and a shaping frame 230 from outside to inside in sequence, the precipitation filtration principle of the precipitation membrane group 200 is that only the aperture of water molecules can be filtered through the ultrafiltration membrane 220, the water molecules are filtered into a sealed cavity formed between the filter membrane cylinder 210 and the ultrafiltration membrane 220, and then the water molecules and concentrated solution are shunted to the filter membrane cylinder 210 so as to be separated and collected. The shaping frame 230 is used to support the ultrafiltration membrane 220 in an expanded state. The bottom end of the settling tank 100 is provided with a fast-assembling cover 130 sleeved with a filter membrane cylinder 210, and the bottom end of the filter membrane cylinder 210 is communicated with a concentrated solution pipe 211 for the concentrated solution in the ultrafiltration membrane 220 to flow out. A filtrate pipe 212 is communicated with one side of the bottom of the filter membrane cylinder 210, and the filtrate pipe 212 is communicated with a cavity between the filter membrane cylinder 210 and the ultrafiltration membrane 220 so as to facilitate the outflow of water molecules. The ultrafiltration membrane 220 is in a cylindrical structure with an open top end, and a plurality of necking ports 221 are arranged at intervals in the middle of the ultrafiltration membrane 220, so that sewage entering the ultrafiltration membrane 220 can obtain sufficient time and can be fully filtered by the ultrafiltration membrane 220. The bottom end of the ultrafiltration membrane 220 is communicated with a liquid outlet 222, and the liquid outlet 222 is spliced with the concentrated liquid pipe 211. The outer diameter of the ultrafiltration membrane 220 is smaller than the inner diameter of the filter membrane cylinder 210, the upper end and the lower end of the ultrafiltration membrane 220 are respectively bonded with a sealing ring 223 and a sealing disc 225 for sealing the upper end and the lower end of the filter membrane cylinder 210, the sealing rings 223 and the sealing discs 225 are both made of rubber, and a sealed cavity is formed between the ultrafiltration membrane 220 and the filter membrane cylinder 210 by utilizing the flexibility and the sealing property of the rubber.

The upper part of the filter membrane cylinder 210 and the inner part of the settling tank 100 are provided with a rotary membrane group 300 for driving the ultrafiltration membrane 220 to rotate and fully contact with the sewage to increase the contact pressure, so as to rapidly filter. The bottom of the settling tank 100 is provided with a settling port 102 right above the quick-mounting cover 130, so that the sewage in the settling tank 100 can flow into the filter membrane cylinder 210. The membrane rotating group 300 comprises a worm gear 330 which is positioned on the precipitation port 102 and can drive the ultrafiltration membrane 220 to rotate and a servo motor 310 which is used for driving the worm gear 330 to rotate.

Drainage plate 110 has been placed to the slope in the top of setting tank 100 for pour into the sewage down-flow in the setting tank 100 and down, the top surface equidistant of drainage plate 110 is equipped with a plurality of mud board 111 that hinder, and the height that hinders mud board 111 is the trend that increases gradually from drainage plate 110 high-end to low side direction, utilizes to hinder the large granule thing that mud board 111 separates in the sewage, thereby reduces ultrafiltration membrane 220's overweight filtration burden. The lower end of the drainage plate 110 is provided with a filter screen 120 which is made of plastic wires into a fluffy shape stacked layer upon layer to further filter large particles in the sewage.

Specifically, the bottom side of the fast-assembly cover 130 is in the shape of a ring and is provided with a plurality of clamping grooves 131 at equal intervals, each clamping groove 131 is in the shape of a 7, the extending end of each horizontal section of each clamping groove 132 is provided with a limiting groove 132, the width of each limiting groove 132 is larger than that of each clamping groove 131, the outer side of the top of the filter membrane cylinder 210 is provided with a clamping block 213 clamped with the clamping grooves 131 correspondingly, the fast-assembly process is that the top end of the filter membrane cylinder 210 is firstly sleeved into the fast-assembly cover 130, the clamping block 213 is clamped into the vertical section of each clamping groove 131, and then the filter membrane cylinder 210 is rotated.

Specifically, the inner wall of the fast-assembling cover 130 is provided with an annular limiting table 133, the top end of the filter membrane cylinder 210 is bonded with a sealing ring 214, the thickness of the sealing ring 214 is larger than the distance between the filter membrane cylinder 210 and the limiting table 133, the sealing ring 214 is made of rubber, and the butt joint of the filter membrane cylinder 210 and the limiting table 133 is sealed by using the flexibility and the sealing performance of the sealing ring 214.

Furthermore, the top surface of the sealing ring 223 is symmetrically provided with the protruding rod 224, and the top surface of the worm wheel 330 is provided with the slot 331 correspondingly inserted with the protruding rod 224, so that the protruding rod 224 is driven by the rotation of the worm wheel 330, and the ultrafiltration membrane 220 is driven to integrally rotate in the filtration membrane cylinder 210. The bottom surface of the worm wheel 330 is adhered with a ferrule 332 which is sleeved and rotated with the fast-assembling cover 130, so that the worm wheel 330 can stably rotate without displacement.

Further, servo motor 310 is installed in the bottom outside of setting tank 100, and servo motor 310's output shaft runs through in setting tank 100 both sides end, and the department of running through all overlaps and is equipped with the sealing ring of rubber material. The output shaft of the servo motor 310 is coaxially connected with a worm 320 which is correspondingly meshed with the worm wheel 330, and the rotating force around the central axis of the output shaft of the servo motor 310 is converted into the rotating force around the central axis of the worm wheel 330 through the transmission mode of the worm 320 and the worm wheel 330, so that the ultrafiltration membrane 220 is driven to rotate and filter.

In addition, the shaping frame 230 is matched with the large-caliber part of the ultrafiltration membrane 220 in a sleeved mode, the neck-reducing opening 221 is sleeved with the neck-fixing ring 231, the shaping shaft 232 which is used for connecting the shaping frame 230 and the neck-fixing ring 231 in series is arranged on the central shaft of the shaping frame 230 and the central shaft of the neck-fixing ring 231, connecting ribs are arranged among the shaping frame 230, the neck-fixing ring 231 and the shaping shaft 232, and PA plastics are adopted for the three parts to be manufactured into an integrated structure, so that the shaping frame 230 is integrally firm and durable.

Specifically, the bottom of setting tank 100 is equipped with interior width and is the shrink end 101 that reduces gradually downwards for sewage concentrates on setting tank 100 bottom, avoids sewage to deposit on a large scale in setting tank 100 bottom, does benefit to sewage promptly and flows out through settling port 102. The inner wall of the top of the settling tank 100 is provided with a plurality of supporting plates 103, namely, the inner walls of two ends and the side wall of the middle part of the settling tank 100 are welded, so that the drainage plate 110 is supported, the drainage plate 110 is convenient to take and place, and sediments on the drainage plate 110 can be cleaned at any time. The top one end intercommunication of setting tank 100 is equipped with water filling port 104 and backward flow mouth 105, and water filling port 104 is used for the pipeline of switching on and introduces sewage, and backward flow mouth 105 is used for the interior dense liquid of filter department of backward flow filter membrane section of thick bamboo 210, and then circulation filtration.

Specifically, the lower end of the mud blocking plate 111 is provided with a water leaking port 112, the edge of the filter screen 120 is bonded with a filter screen frame 121 clamped with the water leaking port 112, and the structure is convenient for taking and placing the filter screen 120 and beneficial to cleaning precipitates on the filter screen 120 so as to be used for multiple times.

Further, a backflow group 400 is arranged below the precipitation membrane group 200, the backflow group 400 comprises a water pumping pipe 420 arranged below the filter membrane cylinder 210, a water pumping pump 410 arranged at one end of the water pumping pipe 420, and a water draining pipe 430 arranged above the water draining end of the water pumping pump 410, the other end of the water pumping pipe 420 is closed, the top of the water pumping pipe 420 is communicated with a branch pipe 421 correspondingly sleeved with the concentrated liquid pipe 211 and used for pumping the concentrated liquid in the filter membrane cylinder 210 into the water pumping pipe 420 and then pumping into the water draining pipe 430 by the water pumping pump 410 for draining, the top end of the water draining pipe 430 is in splicing fit with the backflow port 105, and the filtered concentrated liquid in the water draining pipe 430 flows back into the precipitation box 100 for filtration and circulation again.

In addition, the two axial ends of the water pumping pipe 420 are respectively provided with an elastic supporting pipe 440, the top end of the elastic supporting pipe 440 is provided with a lantern ring 441 which is sleeved with the water pumping pipe 420, the inside of the elastic supporting pipe 440 is sequentially sleeved with a spring 443 and a supporting column 442, the bottom end of the supporting column 442 is fixed on a supporting leg of the settling tank 100 through a bolt, the sliding stroke of the elastic supporting pipe 440 and the supporting column 442 is larger than the height of the branch pipe 421, so that the branch pipe 421 is sleeved on the concentrated liquid pipe 211 under the elastic force of the spring 443, the elastic supporting pipe 440 does not slip off from the supporting column 442, the water pumping pipe 420 is pressed downwards to separate the branch pipe 421 from the concentrated liquid pipe 211, the filter membrane cylinder 210 is convenient to take down, the bottom end of the water discharging pipe 430 is sleeved and slidable with the water discharging end of the water pumping pump 410, and the water pumping pump 410 moves downwards along with the water pumping pipe 420.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A sedimentation device based on milipore filter, is including being open-topped sedimentation tank (100), its characterized in that: a plurality of precipitation membrane groups (200) which can be quickly disassembled are arranged right below the bottom of the precipitation box (100), the precipitation membrane group (200) comprises a filter membrane cylinder (210), an ultrafiltration membrane (220) and a shaping frame (230) from outside to inside in sequence, the bottom end of the settling tank (100) is provided with a fast-assembling cover (130) which is sleeved with the filter membrane cylinder (210), the bottom end of the filter membrane cylinder (210) is communicated with a concentrated liquid pipe (211), one side of the bottom of the filter membrane cylinder (210) is communicated with a filtrate pipe (212), the ultrafiltration membrane (220) is of a cylindrical structure with an opening at the top end, a plurality of necking ports (221) are arranged at the middle part of the ultrafiltration membrane at intervals, the bottom end of the ultrafiltration membrane (220) is communicated with a liquid outlet (222), the outer diameter of the ultrafiltration membrane (220) is smaller than the inner diameter of the filtration membrane cylinder (210), the upper end and the lower end of the ultrafiltration membrane (220) are respectively bonded with a sealing ring (223) and a sealing disc (225) for sealing the upper end and the lower end of the filter membrane cylinder (210);

a rotating membrane group (300) is arranged above the filter membrane cylinder (210) and in the settling tank (100), a settling port (102) is formed in the bottom of the settling tank (100) and right above the quick-mounting cover (130), and the rotating membrane group (300) comprises a worm wheel (330) which is positioned on the settling port (102) and can drive the ultrafiltration membrane (220) to rotate and a servo motor (310) for driving the worm wheel (330) to rotate;

the drainage plate (110) is obliquely placed in the top of the settling tank (100), a plurality of sludge blocking plates (111) are arranged on the top surface of the drainage plate (110) at equal intervals, the height of each sludge blocking plate (111) gradually increases from the high end to the low end of the drainage plate (110), and a filter screen (120) is arranged at the low end of the drainage plate (110).

2. The ultrafiltration membrane-based precipitation device of claim 1, wherein: the utility model discloses a filter membrane cartridge, including fast-assembling cover (130), draw-in groove (131) are 7 fonts and the horizontal segment extends the end and has seted up spacing groove (132), the width of spacing groove (132) is greater than the width of draw-in groove (131), the top outside of filter membrane cartridge (210) is equipped with fixture block (213) that correspond the joint with draw-in groove (131).

3. The ultrafiltration membrane-based precipitation device of claim 2, wherein: the inner wall of fast-assembling cover (130) is equipped with and is annular spacing platform (133), the top of filter membrane section of thick bamboo (210) bonds there is sealing washer (214), the thickness of sealing washer (214) is greater than filter membrane section of thick bamboo (210) with spacing platform (133) interval.

4. The ultrafiltration membrane-based precipitation device of claim 1, wherein: the top surface symmetry of seal (223) is equipped with nose bar (224), slot (331) that correspond the grafting with nose bar (224) are seted up to the top surface of worm wheel (330), the bottom surface bonding of worm wheel (330) has and cup joints with fast-assembling cover (130) and rotatable lasso (332).

5. The ultrafiltration membrane-based precipitation device of claim 1, wherein: the servo motor (310) is installed on the outer side of the bottom of the settling tank (100), an output shaft of the servo motor (310) penetrates through two side ends of the settling tank (100), and a worm (320) which is correspondingly meshed with the worm wheel (330) is coaxially connected to the output shaft of the servo motor (310).

6. The ultrafiltration membrane-based precipitation device of claim 1, wherein: the design frame (230) with ultrafiltration membrane (220) heavy-calibre department cup joints the cooperation, collar (231) are decided in the department cup joint of necking down mouth (221), design frame (230) with be provided with on the center pin of deciding collar (231) and decide the design axle (232) of establishing ties with it.

7. The ultrafiltration membrane-based precipitation device of claim 1, wherein: the bottom of setting tank (100) is equipped with interior width and is the shrink end (101) that reduces gradually downwards, be equipped with a plurality of layer boards (103) on the top inner wall of setting tank (100), the top one end intercommunication of setting tank (100) is equipped with water filling port (104) and return port (105).

8. The ultrafiltration membrane-based precipitation device of claim 1, wherein: a water leakage port (112) is formed in the lower end of the mud blocking plate (111), and a filter screen frame (121) clamped with the water leakage port (112) is bonded to the edge of the filter screen (120).

9. The ultrafiltration membrane-based precipitation device of claim 7, wherein: the below of sediment membrane group (200) is provided with backflow group (400), backflow group (400) are including placing drinking-water pipe (420), the suction pump (410) of drinking-water pipe (420) one end installation and the drain pipe (430) of suction pump (410) drainage end top installation of filter membrane section of thick bamboo (210) below in, the top intercommunication of drinking-water pipe (420) has and corresponds branch pipe (421) that cup joint with dense liquid pipe (211), the top of drain pipe (430) with backward flow mouth (105) are pegged graft the cooperation.

10. The ultrafiltration membrane-based precipitation device of claim 9, wherein: the axial both ends of drinking-water pipe (420) all are provided with elasticity prop pipe (440), the top of elasticity prop pipe (440) is equipped with lantern ring (441) that cup joints with drinking-water pipe (420), spring (443) and prop post (442) have been cup jointed in proper order to the inside of elasticity prop pipe (440), the slip stroke that elasticity prop pipe (440) and prop post (442) is greater than divide the height of managing (421).