CN211111361U - Membrane method filtering equipment for sewage treatment - Google Patents

Abstract

The utility model discloses a membrane method filtering device for sewage treatment, which comprises a filter tank; the filtering device comprises a membrane frame arranged in the filtering pool and a filtering membrane arranged on the membrane frame; the filter material layer is arranged in the filter pool, a plurality of cleaning pieces are arranged in the filter material layer, and the cleaning pieces can impact the filter membrane in a stepless rolling manner under the action of air flow and/or water flow so as to clean the filter membrane; the utility model has the advantages that through the arrangement of the cleaning piece, the cleaning effect on the filtering membrane is better, the cleaning efficiency is high, the consumption of water resources and energy sources is reduced, chemical agents are not needed, the pollution of water quality and environment is avoided, the damage rate of the filtering membrane is reduced, and the service life of the filtering membrane is prolonged; the filter material layer enables the water purification effect to be better, the service cycle of the filter membrane to be prolonged, and the backwashing frequency of the filter membrane to be reduced.

Description

Membrane method filtering equipment for sewage treatment

Technical Field

The utility model belongs to the technical field of water treatment, especially, relate to a embrane method filtration equipment for sewage treatment.

Background

In the prior art of membrane filtration water treatment, a pre-dosing mixer is usually adopted to flocculate a flocculating agent and colloidal impurities in water into tiny particles, a filtering membrane is used for intercepting and filtering, and after the filtering work is carried out to a certain blocking degree of the membrane, the surface of the filtering membrane is cleaned and chemically cleaned so as to recover the filtering function of the filtering membrane.

Most of traditional membrane cleaning methods adopt air washing or water washing to clean pollutants on the surface of a membrane, but no matter the surface of a filtering membrane is washed by air washing or water washing, the pollutants adhered to the surface of the membrane cannot be cleaned due to lack of friction rate on the surface of the filtering membrane, the cleaning effect is poor, partial pollutants are always adhered to the surface of the filtering membrane, so that a water purification filtering membrane cannot recover the normal filtering function, the filtering work period is shortened, the filtering efficiency is reduced, the filtering is long-lasting, the filtering membrane is gradually weakened, and even micropores on the surface layer of the filtering membrane are blocked to lose the filtering effect; in order to recover the filtering function of the membrane, the membrane module must be lifted into a strong acid and strong base chemical pool for soaking and cleaning every time the membrane module is used for a period of time, so that the influence on the water quality (particularly drinking water) and the ecological environment is great.

Disclosure of Invention

The utility model discloses an overcome prior art not enough, provide a good embrane method filtration equipment that is used for sewage treatment of cleaning performance.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a membrane process filtration apparatus for wastewater treatment comprising

A filter chamber;

the filtering device comprises a membrane frame arranged in the filtering pool and a filtering membrane arranged on the membrane frame;

the filter material layer is arranged in the filter pool, a plurality of cleaning pieces are arranged in the filter material layer, and the cleaning pieces can impact the filter membrane in a stepless rolling manner under the action of air flow and/or water flow so as to clean the filter membrane;

through the arrangement of the cleaning piece, when the filtering membrane needs to be cleaned, the cleaning piece can perform irregular rolling motion of a three-dimensional track in the filtering tank under the action of air flow and/or water flow, the air, the water flow and the cleaning piece continuously impact on the filtering membrane under the driving of the air, the impact force of the air and the water flow and the friction force of the cleaning piece are utilized to impact and rub off dirt attached to the surface of the filtering membrane, the cleaning effect is better, the filtering membrane can recover the normal filtering function, the cleaning efficiency is high, the consumption of water resources and energy is reduced, the filtering membrane does not need to be cleaned by using chemical agents, the pollution of water quality and environment is avoided, the damage rate of the filtering membrane is reduced, and the service life of the filtering membrane is prolonged; and the filth that adheres to on the washing piece then can be when the back flush, because the washing piece does three-dimensional orbit's unordered rolling motion in the filtering pond, so can collide each other and rub between the washing piece to will adhere to the filth on the washing piece and clear away totally, and then guarantee that the washing piece can clear away the filth that adheres to on filtration membrane totally, the filter material layer that the washing piece formed of stewing also has better supplementary filter effect all the time.

Further, the filter also comprises a gas source assembly used for conveying gas into the filter tank; the three-dimensional and disordered rolling motion of the cleaning piece in the filter tank is realized through the delivery of high-pressure gas, the driving mode is simple, and the equipment cost and the energy consumption are reduced; meanwhile, the gas wrapping water and the cleaning piece continuously impact on the filtering membrane, so that multiple dynamic cleaning of air washing, water washing and scrubbing of the filtering membrane is realized, the cleaning effect is better, the cleaning efficiency is higher, and the consumption of water resources and energy sources is reduced.

Further, the gas source assembly comprises a gas outlet pipe arranged in the filter tank, a gas inlet pipe with one end communicated with the gas outlet pipe and a gas supply piece communicated with the other end of the gas inlet pipe; through the arrangement of the structure, the air is conveyed into the filter chamber, the structure is simple, and the operation is stable.

Furthermore, the filter tank comprises a filtering area, a sludge collecting area and an interlayer arranged between the filtering area and the sludge collecting area, and the filter material layer and the filter membrane are both arranged in the filtering area; through the arrangement of the structure, the filter chamber is divided into the filtering area and the sludge collecting area, so that the sewage obtained by backwashing can be conveniently collected and uniformly treated, the sewage is prevented from influencing the normal treatment of the filtering device on the sewage, and the equipment is ensured to have a better water purifying effect all the time.

Further, plate holes are formed in the interlayer; the dirt can be settled to the mud collecting area through the plate holes, and the collection is more convenient.

Further, the air outlet pipe is provided with air outlet holes corresponding to the plate holes; make from the gas outlet duct spun gas can direct action on wasing the piece, can not blockked by the interlayer, have stronger impact force, drive rivers that can be better and wash the piece and strike on filtration membrane, the cleaning performance is better.

Further, a mud collecting surface is arranged in the mud collecting area, and the mud collecting area is communicated with a mud discharging pipe; make the filth can assemble in the bottom in album mud district along gathering the mud face, convenient the discharge relies on water pressure can be convenient discharge the filth unified processing, handles more conveniently, need not the setting of driving piece, practices thrift the cost, reduces the energy consumption.

Further, filtration membrane at least part is located in the filter material layer, through the setting of above-mentioned structure for when need not to carry out the back flush to filtration membrane, the washing piece has stood and has formed the filter material layer in the filtering pond, filtration membrane at least part is buried underground in the filter material layer and is making filtration membrane when carrying out sewage treatment, the filth in the sewage can be earlier filtered a part by the interception of filter material layer, thereby reduced filtration membrane's burden, the live time of filtration membrane has been prolonged, filtration membrane's back flush frequency has been reduced, when the filter effect is better, the energy consumption has been reduced.

Further, the cleaning pieces are arranged in a granular structure; the filter has better cleaning effect and can also play a role in filtering.

Further, the cleaning piece is a ceramic particle filter material; the cleaning effect is better.

To sum up, the utility model has the advantages that through the arrangement of the cleaning piece, the cleaning effect on the filtering membrane is better, the cleaning efficiency is high, the consumption of water resource and energy is reduced, chemical agent is not needed, the pollution of water quality and environment is avoided, the damage rate of the filtering membrane is reduced, and the service life of the filtering membrane is prolonged; the filter material layer enables the water purification effect to be better, the service cycle of the filter membrane to be prolonged, and the backwashing frequency of the filter membrane to be reduced.

Drawings

Fig. 1 is a schematic perspective view of embodiment 1 of the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

fig. 3 is a schematic cross-sectional structural view of embodiment 1 of the present invention;

FIG. 4 is an enlarged schematic view at B of FIG. 3;

fig. 5 is a schematic longitudinal perspective sectional structure view of embodiment 1 of the present invention;

FIG. 6 is an enlarged schematic view at C of FIG. 5;

fig. 7 is a schematic cross-sectional structural view of embodiment 2 of the present invention;

FIG. 8 is an enlarged schematic view at A of FIG. 7;

fig. 9 is a schematic longitudinal perspective sectional structure view of embodiment 2 of the present invention;

FIG. 10 is an enlarged schematic view at B of FIG. 9;

fig. 11 is a schematic perspective view of an air filter head in embodiment 2 of the present invention;

fig. 12 is a schematic perspective sectional view of an air filter head in embodiment 2 of the present invention;

fig. 13 is a schematic perspective view of a mud discharge filter head in embodiment 2 of the present invention.

Detailed Description

Example 1:

as shown in fig. 1-6, a membrane filtration apparatus for sewage treatment comprises a filter tank 1, a filtration device and a back-flushing device; in the embodiment, the filter 1 is formed by pouring cement and is provided with a hollow cubic structure with an opening at the upper part, and in other embodiments, the filter can also be made of metal materials or other materials; wherein, the filtering device comprises a connecting pipe 20, a membrane frame 21, a filtering membrane 22, a water collecting pipe 23, a suction piece 24 and a water outlet valve 25; the filtering membrane 22 is arranged on the connecting pipe 20, the connecting pipe is arranged on the membrane frame 21, and the connecting pipe and the membrane frame are detachably connected, so that the disassembly, assembly, maintenance and replacement are convenient; the filtering membrane 22 is a commercially available mesoporous membrane, which is a prior art and therefore not described in detail herein; holes reserved at two ends of the filtering membrane are communicated with the connecting pipe 20 and are fixedly sealed, so that a channel in the filtering membrane can be communicated with the connecting pipe; the membrane frame 21 is arranged in the filter tank 1, so that the filter membrane 22 is immersed by the sewage; the water collecting pipe 23 is arranged on the membrane frame, one end of the water collecting pipe is communicated with the connecting pipe 20, so that clean water obtained by filtering through the filtering membrane can enter the water collecting pipe, and the other end of the water collecting pipe is communicated with the clean water tank 3, so that the clean water in the water collecting pipe can be conveyed into the clean water tank 3, and subsequent treatment is facilitated; the suction piece 24 acts on the water collecting pipe, so that negative pressure is formed on one side of the water collecting pipe close to the filtering membrane, the sewage in the filter tank 1 is sucked to the filtering membrane 22, impurities in the sewage are blocked by the filtering membrane, and clear water can enter a channel in the filtering membrane through a filtering hole in the filtering membrane, then is converged into the water collecting pipe 23 through the connecting pipe 20 and then is discharged into the clear water tank 3 through the water collecting pipe; in this embodiment, the suction member 24 is a commercially available variable frequency suction pump, which is a prior art and therefore will not be described herein, and therefore, the drawings of the specification are not drawn in detail, and only a cube is drawn as an illustration, it should be noted that the dimensions of a part of the structure in the drawings are particularly enlarged for clarity, and are not actual dimensions in production application, and hereinafter, similar pumps or motors are also the same; the variable frequency suction pump is arranged on the water collecting pipe 23; a water outlet valve 25 is also arranged on the water collecting pipe and used for controlling the on-off of the water collecting pipe, the water outlet valve is a stop valve purchased in the market, which is the prior art, so the details are not described herein, and in other embodiments, the water outlet valve can also be an electric valve, so the use is more convenient and labor-saving; in other embodiments, for example, when the flux of the filtering membrane meets the requirement of water production, the water can directly flow into the clean water tank by exceeding the gravity of the pipe, thereby achieving the purpose of energy conservation and consumption reduction.

Specifically, the backwashing device comprises a flushing component and a gas source component; wherein, the flushing component comprises a water supply part 31, a water inlet pipe 32 and a water inlet valve 33; the water supply member 31 is installed in the clean water tank 3, and is a water pump purchased in the market, which is the prior art and therefore not described herein; one end of the water inlet pipe 32 is communicated with the output end of the water supply piece, the other end is communicated with the water collecting pipe 23, and the connection point is positioned on the pipe section of the water outlet valve 25 close to one side of the filtering membrane 22; a water inlet valve 33 is installed on the water inlet pipe, and the water inlet valve is a stop valve purchased in the market, which is the prior art, so the detailed description is omitted; a plurality of cleaning pieces 34 are arranged in the filter 1, the cleaning pieces 34 are filter materials (in the attached drawings of the specification, fig. 5 and fig. 6, the size of the cleaning pieces is enlarged for clearer and clearer representation, and the actual size is based on practical application), specifically, the filter materials in the application are ceramic particle filter materials and are arranged in a spherical structure, and in other embodiments, the filter materials can be arranged in other structural shapes such as a cylindrical structure, an ellipsoid structure, a water drop structure and the like; a plurality of filter materials are placed in the filter chamber, so that in the normal sewage filtering treatment process, the filter materials are settled in the filter chamber and laid into a filter material layer 39 (in the attached drawings of the specification, fig. 3 and fig. 4, for convenience of drawing and clear drawings, the filter material layer is only a schematic diagram, and the shape of the filter materials in the filter material layer is not drawn in detail), at least part of the filter membrane 22 is buried in the filter material layer, so that the dirt in the sewage can be adsorbed and intercepted by the filter material, the filtering effect is better, the process that the filter membrane is blocked by the dirt is slowed down, and the working time and the service life of the filter membrane are prolonged; in other embodiments, the filter material may be other sand filter materials or granular or block filter materials; the air source assembly is used for conveying high-pressure gas into the filter tank 1, the cleaning piece (filter material) in the filter tank can do irregular and three-dimensional rolling motion in the filter tank under the impact of the high-pressure gas, namely the filter material moves and floats in the filter tank under the carrying and pushing of the high-pressure gas, and simultaneously rolls, and the filter materials can also collide with each other, so that the motion trail of the filter material is more disordered due to the collision, and the mutual collision among the filter materials not only ensures that the motion of the filter material is more violent and more disordered, but also ensures that sundries adhered to the filter material can be removed by friction; gas carries water and the filter material together random impact on filtration membrane, forms the three-dimensional mixed friction washing of gas washing + sand washing to filtration membrane for attached to debris on filtration membrane can be clear away totally under the impact of air current and rivers and the friction of filter material, and is better to filtration membrane's cleaning performance.

When the filtering membrane 22 is used for a period of time, a lot of impurities are attached to the filtering membrane, so that the filtering membrane is blocked to a certain extent, and at the moment, the backwashing device needs to be opened to backwash the filtering membrane, so that the filtering membrane can recover the filtering function again; specifically, when the backwashing is required, the suction member 24 is closed and the water collection pipe 23 is cut off by the water outlet valve 25, so that water cannot flow into the clean water tank 3 but can flow to the filter membrane 22; at the moment, the water inlet valve 33 is opened to enable the water inlet pipe 32 to be communicated with the water collecting pipe, then the water supply part 31 is started, the water supply part can pump the clean water in the clean water tank 3 into the water inlet pipe 32, then the clean water enters the connecting pipe 20 through the water collecting pipe, then the clean water enters the channel on the filtering membrane 22 communicated with the connecting pipe, and finally the clean water flows out of the filtering holes on the filtering membrane, so that impurities attached to the filtering membrane can be washed away by one part; meanwhile, the air source component is enabled to convey high-pressure air into the filter tank, the cleaning parts (filter materials) in the filter tank do irregular and three-dimensional rolling motion in the filter tank under the action of the high-pressure air, and the mutual collision among the filter materials not only enables the motion of the filter materials to be more violent and more disordered, but also enables sundries adhered to the filter materials to be removed by friction; the gas carries water and the filter material to randomly impact on the filter membrane, and the filter membrane is subjected to three-dimensional mixed cleaning of gas washing, water washing and sand washing, so that impurities attached to the filter membrane can be removed completely under the impact of airflow and water flow and the friction of the filter material, and the cleaning effect on the filter membrane is better; the water flow flowing out of the filtering membrane 22 under the action of the water supply piece 31 enables the cleaning piece 34 not to be attached to the filtering membrane all the time, so that the filtering membrane is prevented from being damaged, but the cleaning piece impacts the filtering membrane under the wrapping of the air flow, after the dirt on the filtering membrane is rubbed off, the kinetic energy given to the cleaning piece by the air flow is gradually weakened, then the cleaning piece moves towards the direction far away from the filtering membrane under the action of the water flow flowing out of the filtering membrane (namely the driving force of the water flow flowing out of the filtering membrane is smaller than that of the air flow, and the cleaning piece is required to be pushed away by the water flow after most of the kinetic energy is consumed in the process of impacting and rubbing the filtering membrane), and collides with other cleaning pieces, so that the dirt attached to the cleaning piece can be peeled off in the mutual collision of the cleaning pieces when the filtering membrane is scrubbed; meanwhile, the airflow carries other cleaning pieces to continuously impact on the filtering membrane before and after the cleaning pieces, and the filtering membrane is continuously and dynamically cleaned; after the back flushing is finished, high-pressure gas is stopped being conveyed into the filter chamber, the water inlet valve and the water supply piece are closed, the suction piece is started again, the water outlet valve is opened, and then the sewage treatment can be started again.

Specifically, the gas source assembly includes a gas supply member 35, a gas inlet pipe 36 and a gas outlet pipe 37; an interlayer 38 is arranged in the filter tank 1, the interlayer separates the filter tank 1 into a filtering area 11 and a sludge collecting area 12, the membrane frame 21 is arranged on the interlayer and positioned in the filtering area, the cleaning piece 34 is also laid on the interlayer and positioned in the filtering area above the interlayer, and a filter material layer is laid on the interlayer; the partition 38 is provided with a plurality of plate holes 381 through which air and dirt can pass but the cleaning piece 34 cannot pass; the air outlet pipes 37 are arranged below the interlayer, a plurality of air outlet holes 371 are formed in the water outlet pipe and are positioned above the water outlet pipe, preferably, the air outlet holes 371 are opposite to the plate holes 381, so that air flow sprayed out of the air outlet holes can smoothly penetrate through the plate holes in the interlayer, impact force is sufficient, and a cleaning part can be well flushed; one end of the air inlet pipe 36 is communicated with the air outlet pipe 37, and the other end extends out of the filter tank 1 and is communicated with the output end of the air supply piece 35 arranged outside the filter tank, so that the pipe orifice of the air inlet pipe positioned outside the filter tank is higher than the tank wall of the filter tank, a check valve does not need to be arranged on an air outlet hole, and the sewage does not need to be discharged in a reverse flow mode through the air inlet pipe, so that the equipment cost and the installation difficulty are greatly reduced; the air supply member 35 is a commercially available air compressor, which can supply a sufficient amount of high-pressure air, and is known in the art, and therefore, will not be described herein.

Preferably, a plurality of convex parts 382 are arranged around the plate hole 381, the convex parts are formed by extending outward at least part of the upper surface of the partition layer 38 around the plate hole 381, and a gap is reserved between every two adjacent convex parts, so that the plate hole 381 cannot be blocked when the cleaning part 34 is settled on the partition layer 38 after the air supply part 35 stops working, and dirt can smoothly enter the mud collection area 12 through the plate hole.

Further, a sludge collection surface 121 is formed at the bottom of the sludge collection area 12, and is formed in an inclined state, so that the dirt (mainly sludge-water mixture) entering the sludge collection area can flow downwards along the sludge collection surface and is finally collected in a sludge discharge groove 13 formed at the bottom of the sludge collection area; the sludge discharge groove 13 is communicated with a sludge discharge pipe 14, and a sludge discharge valve 15 is arranged on the sludge discharge pipe; when more sewage is collected in the sludge discharge tank, the sludge discharge valve is opened, and the sewage is discharged along the sludge discharge pipe under the action of the water pressure in the filter tank 1, so that a sludge discharge pump is not required to be additionally installed, and the equipment cost is reduced.

Example 2:

as shown in fig. 7 to 13, the present embodiment is different from embodiment 1 in that: the air source assembly comprises an air supply piece 35, an air inlet pipe 36 and a filter head plate 4; the filter head plate 4 comprises a plate body 41, an air impact filter head 42 and a mud discharge filter head 43; the plate body 41 is arranged in the filter tank 1, the plate body is in sealing fit with the tank wall of the filter tank, the filter tank 1 is divided into a filtering area 11 and a sludge collecting area 12, the membrane frame 21 is arranged on the plate body and positioned in the filtering area, the cleaning piece 34 is also laid on the plate body 41 and positioned in the filtering area above the plate body, and a filter material layer is laid on the plate body; one end of the air inlet pipe 36 is communicated with the sludge collection area 12, the pipe orifice is close to the lower surface of the plate body 41, and the other end extends out of the filter tank 1 and is communicated with the output end of the air supply piece 35 arranged outside the filter tank, so that the pipe orifice of the air inlet pipe positioned outside the filter tank is higher than the tank wall of the filter tank, and even if a one-way valve is not arranged at the pipe orifice of the air inlet pipe positioned in the sludge collection area, the sewage is not worried about to be discharged in a reverse flow manner through the air inlet pipe; the air supply member 35 is a commercially available air compressor or air pump, and can supply sufficient amount of high-pressure air, which is prior art and therefore not described herein; a plurality of mounting holes 411 are formed in the plate body 41, the air impact filter heads 42 and the sludge discharge filter heads 43 are mounted on the plate body through the mounting holes, the air impact filter heads 42 and the sludge discharge filter heads 43 are uniformly mounted on the plate body, and the air impact filter heads 42 and the sludge discharge filter heads 43 are sequentially mounted in a staggered manner.

Specifically, the air-blast filter head 42 comprises an air-blast filter rod 421, an air-blast hood 422, an air-blast seal gasket 423, an air-blast fastener 424 and an air-blast filter pocket 425; the air impact filtering rod 421 is provided in a hollow cylindrical structure, the air impact filtering rod 421 is communicated with the air impact head cover 422, and the air impact filtering rod and the air impact head cover are integrally formed, the air impact filtering rod can pass through the mounting hole 411 on the plate body 41, and the air impact head cover cannot pass through the mounting hole; the end, close to the air-jet head cover, of the air-jet filter rod is provided with an external thread, the air-jet fastener is in a regular hexagon shape, a through hole 4241 for the air-jet filter rod to pass through is formed in the air-jet fastener, and an internal thread is formed in the inner wall of the through hole, so that the air-jet fastener and the air-jet filter rod can form threaded connection and matching; during installation, the air impact filter rod is sleeved with the air impact sealing gasket 423, the air impact filter rod is inserted into the installation hole 411, then the air impact filter rod is sleeved with the air impact sealing gasket, finally the air impact fastener is screwed with the air impact filter rod to complete installation and fixation of the air impact filter head, and meanwhile, the air impact filter head is in sealing fit with the plate body 41, so that air and water can not pass through the installation hole provided with the air impact filter head; the air impact filter pocket 425 is in threaded connection with one end of the air impact filter rod 421 far away from the air impact head cover 422, and the air impact filter pocket 425 can be in threaded connection with the lower end of the air impact filter rod after the air impact filter rod is fixed on the plate body 41 by the air impact fastener; in other embodiments, the air filter pocket may be integrally formed with the air filter rod, but have a diameter smaller than the mounting hole 411.

Further, the air blast hood 422 comprises an arc-shaped hood shell 4221 and a hood bottom 4222 connected with the hood shell, a plurality of air blast gaps 4223 are formed in the hood shell, the air blast gaps are uniformly formed along the circumferential direction of the outer surface of the hood shell, and the cleaning piece 34 cannot pass through the air blast gaps; the cover bottom 4222 is provided with a plurality of air blast passages 4224 which are uniformly arranged along the circumferential direction of the cover bottom; preferably, the air-blast channel is radially and obliquely arranged downwards, so that the air can be sprayed out obliquely downwards along the air-blast channel, and the cleaning piece 34 which is statically laid on the plate body 41 is more easily lifted under the impact of the air, a three-dimensional and disordered rolling state is formed, and a better cleaning effect is achieved on the filtering membrane 22; at least part of the surface of the cover bottom 4222 extends outwards to form a sealing boss 4225, the sealing boss is arranged to better press the air impact sealing gasket 423 on the plate body 41 to achieve a better sealing effect, a gap is reserved between the cover bottom 4222 and the plate body 41, and the cleaning piece is guaranteed to be smoothly lifted by air flow rushed out of an air impact channel and cannot pass through the gap by the cleaning piece 34; an exhaust hole 4211 is formed in the upper part (namely, the side close to the air-jet cover 422) of the air-jet filter rod 421, so that dirt is not easy to enter; the air blast filter pocket 425 is provided with a plurality of dirt filtering holes 4251, so that air and water can pass through the dirt filtering holes and dirt cannot pass through the dirt filtering holes.

Specifically, the mud discharging filter head 43 comprises a mud discharging filter rod 431, a mud discharging head cover 432, a mud discharging sealing gasket 433 and a mud discharging fastening piece 434; the sludge discharge filter rod 431 is arranged in a hollow cylindrical structure, the sludge discharge filter rod 431 is communicated with the sludge discharge head cover 432, the sludge discharge filter rod and the sludge discharge head cover are integrally formed and processed, the sludge discharge filter rod can pass through the mounting hole 411 on the plate body 41, and the sludge discharge head cover cannot pass through the mounting hole; an external thread is arranged at one end of the sludge discharge filter rod close to the sludge discharge head cover, the sludge discharge fastening piece 434 is in a regular hexagon and is provided with a through hole for the sludge discharge filter rod to pass through, and an internal thread is arranged on the inner wall of the through hole, so that the sludge discharge fastening piece and the sludge discharge filter rod can form threaded connection and matching; during the installation, cup joint row mud sealing gasket 433 on row mud filter rod, will arrange in mud filter rod inserts mounting hole 411 again, then cup joint a row mud sealing gasket on row mud filter rod again, it is fixed with the installation that row mud filter head can be accomplished to row mud fastener and row mud filter rod spiro union again at last, also formed sealed cooperation between row mud filter head and the plate body 41 simultaneously for gas and water all can't pass through from the mounting hole of installing row mud filter head.

Further, the length of the sludge discharge filter rod 431 is greater than that of the air impact filter rod 421; the sludge discharge head cover 432 is provided with a plurality of sludge discharge ports 4321, the caliber of each sludge discharge port is large, so that dirt can enter the sludge discharge head cover more easily through the sludge discharge port and is discharged into the sludge collection area 12 through a sludge discharge filter rod communicated with the sludge discharge head cover; meanwhile, the caliber of the sludge discharge port is smaller than the diameter of the cleaning piece 34, so that the cleaning piece cannot enter the sludge discharge head cover through the sludge discharge port; preferably, a mud discharging inclined plane 4322 is further formed in the mud discharging head cover 432, and the bottom surface of the mud discharging head cover is in contact with the upper surface of the plate body 41, so that dirt can enter a mud discharging opening along the mud discharging inclined plane, and the dirt can be discharged completely more easily.

Specifically, the operation steps and the principle of the air source assembly are as follows: when the backwashing is needed, the air supply part 35 is started, the air supply part delivers air into the mud collection area 12 through the air inlet pipe 36, because the plate body 41 is in sealing fit with the filter, the air is attached to the lower surface of the plate body 41 under the action of buoyancy, along with the continuous delivery of the air into the mud collection area, an air cushion layer 40 is formed below the plate body 41, water in the mud collection area is pressed into the filter area 11 through an air flushing filter head 42 and a mud discharging filter head 43, the air cushion layer 40 in the mud collection area is thicker and higher in pressure (according to the different conditions of the area, the depth and the like of the filter, the impact force of the required high-pressure air flow is different, the thickness of the air cushion layer 40 can be changed by installing air flushing filter rods with different lengths according to the requirements of different air pressures under different conditions, and accordingly, the air flushing filter rods can be set to be telescopic, better adaptability); because the length of the sludge discharge filter rod 431 is greater than that of the air impact filter rod 421, as the thickness of the air cushion layer 40 becomes thicker and thicker, the thickness of the air cushion layer 40 is greater than that of the air impact filter rod 421, at the moment, air is pressed into the air impact filter rod under the action of pressure, enters the air impact cover 422 communicated with the air impact filter rod, and is sprayed out of the air impact gap 4223 and the air impact channel 4224 on the air impact cover, strong impact force enables the cleaning piece 34 laid on the plate body 41 to be flushed, three-dimensional (the motion track of the cleaning piece is three-dimensional) and disordered rolling motion is carried out in the filtering area 11, the surface of the filtering membrane 22 is rubbed and cleaned, and dirt attached to the surface of the filtering membrane is all rubbed down; meanwhile, the gas can impact the filtering membrane together with water, and the filtering membrane is further cleaned, namely the filtering membrane is simultaneously subjected to three-dimensional mixed multi-cleaning of gas washing, water washing and scrubbing, so that the cleaning effect is better; meanwhile, the gas carries the water and the cleaning piece to be flushed on the filtering membrane together, and the gas and the water can play a role of an air cushion and a water cushion, so that the cleaning piece can rub off dirt on the filtering membrane without damaging the filtering membrane.

Wherein, because the caliber of the sludge discharge port 4321 is larger, part of the dirt scrubbed off directly falls into the sludge discharge port and is discharged into the sludge collection area 12, and the sewage discharge effect is better; the vent holes 4211 arranged on the air impact filtering rod 421 have small aperture, so that only a small part of air enters the air impact filtering head 42 through the vent holes, the formation of the air cushion layer 40 cannot be influenced, and meanwhile, in the process of forming the air cushion layer 40, because a small part of air enters the air impact filtering rod 421 through the vent holes and is discharged into the filtering area 11 from the air impact filtering head, the pre-loosening effect on a filter material layer formed by the cleaning piece 34 can be achieved, so that when a large amount of air is gushed from the air impact filtering head, the cleaning piece is more easily flushed, and the three-dimensional mixed type flushing is formed; the installation of the air scouring filter pocket 425 then allows air and water in the mud collection area 12 to enter the air scouring filter rod 421 through the dirt filtering holes 4251 provided in the air scouring filter pocket, while dirt cannot pass through the dirt filtering holes and is left in the mud collection area.

After the back flushing is finished, the air supply part 35 is closed, the air supply part stops conveying air into the mud collection area 12, at the moment, a large amount of air does not flow out of the air flushing filter head 42 any more, the power of the cleaning part 34 in the filter area is greatly reduced because the air does not flow in any more, the cleaning part and the dirt do not roll violently, the cleaning part and the dirt can slowly settle, and part of the cleaning part and the dirt directly enter the mud discharge filter head through the mud discharge port 4321 and then are discharged into the mud collection area 12; at the moment, under the action of the water pressure in the filtering area 11, sewage enters the sludge collecting area through the sludge discharge filter head and brings dirt into the sludge collecting area, and a vortex is formed at the position of the sludge discharge head cover 432 along with the entering of the sewage, so that the dirt in the filtering area is more easily sucked into the sludge collecting area, and the collection and the uniform treatment of the dirt are facilitated; at this time, under the action of water pressure, the air in the air cushion layer 40 is pressed into the air filtering rod 421 through the air vent hole 4211, and then is discharged into the filtering area 11 through the air filtering head cover 422, so that the air in the air cushion layer 40 is slowly emptied; because only a small amount of air enters the air impact filter rod through the exhaust holes 4211 on the air impact filter rod 421 and then is discharged into the filtering area 11 through the air impact head cover 422, the small air flow does not disturb the sewage in the filtering area, but forms a small upward driving force in the filtering area and is matched with the downward suction force at the sludge discharge head cover 432, so that the sewage in the filtering area can form a circularly flowing water flow which flows upwards from the air impact head cover and then flows downwards from the upper part of the sludge discharge head cover, and the circulating water flow enables the dirt on the upper layer of the sewage to sink and be close to the sludge discharge head cover under the driving of the circulating water flow and then is sucked into the sludge collection area from the sludge discharge head cover to be collected, thereby achieving a better dirt discharge effect; the air flushing filter heads 42 and the sludge discharge filter heads 43 are sequentially and mutually staggered, so that the effect of circulating water flow is better, and the sludge in the filter area is more easily discharged into the sludge collection area; the air in the air cushion layer 40 is discharged slowly due to the small aperture of the vent hole 4211, so that the speed of sewage entering the sludge collection area 12 through the sludge discharge filter head 43 is slow, the sewage in the filter area 11 has enough time to settle down, the sewage is sucked into the sludge collection area by the sludge discharge filter head more easily, and the sewage discharge effect is better; after the air in the air cushion layer 40 is emptied, after the dirt in the dirt collecting area is collected into the dirt discharging groove 13, the dirt discharging valve 15 is opened, the dirt can be discharged along the dirt discharging pipe 14 under the action of water pressure, a dirt discharging pump does not need to be additionally installed, and the equipment cost is reduced.

It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

Claims (10)

1. A kind of membrane method used for sewage treatment filters the apparatus, characterized by that: comprises that

A filter tank (1);

the filtering device comprises a membrane frame (21) arranged in the filter tank (1) and a filtering membrane (22) arranged on the membrane frame (21);

the filter material layer (39) is arranged in the filter tank (1), a plurality of cleaning pieces (34) are arranged in the filter material layer, the cleaning pieces (34) can impact the filter membrane (22) in a non-sequential rolling manner under the action of air flow and/or water flow, and then the filter membrane (22) is cleaned.

2. The membrane process filtration apparatus for wastewater treatment according to claim 1, characterized in that: also comprises an air source assembly used for conveying air into the filter tank (1).

3. The membrane process filtration apparatus for wastewater treatment according to claim 2, characterized in that: the air source assembly comprises an air outlet pipe (37) arranged in the filter tank (1), an air inlet pipe (36) with one end communicated with the air outlet pipe (37) and an air supply piece (35) communicated with the other end of the air inlet pipe (36).

4. The membrane process filtration apparatus for wastewater treatment according to claim 3, characterized in that: the filter tank (1) comprises a filtering area (11), a sludge collecting area (12) and an interlayer (38) arranged between the filtering area (11) and the sludge collecting area (12), wherein a filter material layer (39) and a filter membrane (22) are arranged in the filtering area (11).

5. The membrane process filtration apparatus for wastewater treatment according to claim 4, characterized in that: and a plate hole (381) is arranged on the interlayer (38).

6. The membrane process filtration apparatus for wastewater treatment according to claim 5, characterized in that: and the air outlet pipe (37) is provided with an air outlet hole (371) corresponding to the plate hole (381).

7. The membrane process filtration apparatus for wastewater treatment according to claim 4, characterized in that: a mud collecting surface (121) is arranged in the mud collecting area (12), and the mud collecting area (12) is communicated with a mud discharging pipe (14).

8. The membrane process filtration apparatus for wastewater treatment according to claim 1, characterized in that: the filter membrane (22) is at least partially arranged in the filter material layer (39).

9. The membrane process filtration apparatus for wastewater treatment according to any one of claims 1 to 8, characterized in that: the cleaning elements (34) are arranged in a granular structure.

10. The membrane-method filtration apparatus for wastewater treatment according to claim 9, characterized in that: the cleaning piece (34) is a ceramic particle filter material.

Images