CN212269545U - Normal pressure membrane separation device - Google Patents
Normal pressure membrane separation device Download PDFInfo
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- CN212269545U CN212269545U CN202020834608.5U CN202020834608U CN212269545U CN 212269545 U CN212269545 U CN 212269545U CN 202020834608 U CN202020834608 U CN 202020834608U CN 212269545 U CN212269545 U CN 212269545U
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Abstract
The utility model provides a normal pressure membrane separation device, which relates to the field of membrane separation and solves the problems that the membrane separation device needs pressurized back washing, has a complex structure and occupies a large space; the device comprises a sewage tank, a separation tank, an ozone device and a reflux device, wherein sewage in the sewage tank can flow into the separation tank, a separation membrane is arranged in the separation tank, and a water outlet is formed in the wall of the separation tank; the ozone device is connected with the separation box and comprises an ozone generator, an ozone pipe and an aeration rod, wherein the ozone generator, the ozone pipe and the aeration rod are connected with each other; the backflow device is connected with the separation box and is used for enabling the solid separated by the separation membrane to flow back into the sewage tank; the backflow device of the utility model reflows the separated sludge to the sewage tank, reduces the pollutants in the environment treated by the membrane, and realizes the backwashing of the membrane; the strong oxidation of ozone is utilized to clean the pores of the separation membrane, the permeability of the separation membrane is kept, and the digestion function on pollutants in the sewage is realized. Is suitable for sewage treatment devices with compact space.
Description
Technical Field
The utility model belongs to the technical field of the membrane separation technique and specifically relates to a normal pressure membrane separation device is related to.
Background
Solid-liquid separation is an essential step in sewage treatment, wherein membrane separation is one of the most applied modes, but the flux of the membrane is reduced along with the increase of the service time until the membrane is completely blocked due to the attachment of pollutants in water. The current common approach is to pressurize one side of the membrane to increase the water flux; the membrane is cleaned by timing back washing, and the service life of the membrane is prolonged.
The applicant has found that the prior art has at least the following technical problems: the pressurized and timed backwash method requires a large number of pipes and valves and a complicated control program, and is not particularly suitable for a compact sewage treatment plant. Therefore, there is a strong need for a membrane separation device that can be operated at atmospheric pressure to increase the flexibility of installation and use of the sewage treatment device.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a normal pressure membrane separation device, which solves the technical problems that the prior membrane separation device in the prior art needs pressurized back washing, has complex structure and occupies large space; the utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a normal pressure membrane separation device, including sewage case, separator box, ozone device and reflux unit, wherein: sewage in the sewage tank can flow into the separation tank, a separation membrane is arranged in the separation tank, and a water outlet is formed in the wall of the separation tank;
the ozone device is connected with the separation box and comprises an ozone generator, an ozone pipe and an aeration rod, wherein the ozone generator, the ozone pipe and the aeration rod are connected with each other;
the backflow device is connected with the separation box and is used for enabling the solid separated by the separation membrane to flow back into the sewage tank.
Preferably, a first check valve is arranged between the sewage tank and the separation tank, and the first check valve can allow sewage in the sewage tank to flow into the separation tank.
Preferably, the number of the aeration rods is two, and the two aeration rods are respectively positioned at the inner side and the outer side of the separation membrane.
Preferably, the separation box comprises an upper separation box and a lower separation box which are arranged up and down, wherein the separation membrane is vertically arranged in the upper separation box, and the two aeration rods are respectively positioned in the upper separation box and the lower separation box so as to aerate the inner side and the outer side of the separation membrane.
Preferably, the backflow device comprises an air pump and an air pipe, wherein the air pipe comprises a branch pipe and a backflow pipe, the branch pipe connects the air pump and the backflow pipe, one end of the backflow pipe extends to the bottom of the separation tank, and the other end of the backflow pipe extends to the top of the sewage tank and is communicated with the sewage tank.
Preferably, the backflow device comprises a water pump, a water pipe and a second one-way valve arranged on the water pipe, wherein the water pipe is connected with the bottom of the separation tank and the sewage tank, and the separated sludge can flow back into the sewage tank through the second one-way valve when the water pump is started.
Preferably, a flow guide device is arranged at the top of the separation tank, and the flow guide device is respectively communicated with the separation tank and the sewage tank and is used for guiding foam generated by aeration of the ozone device into the sewage tank.
Preferably, the flow guide device comprises a flow guide box communicated with the top of the separation box, the height of the flow guide box is higher than that of the top end of the sewage tank, a flow guide groove is formed in one side, close to the sewage tank, of the flow guide box, and the flow guide groove extends to the upper portion of the sewage tank.
Preferably, the material of the separation membrane is polyethylene, polypropylene, polytetrafluoroethylene, ceramic or stainless steel.
Preferably, the aperture of the separation membrane is 1-1000 μm.
The utility model provides a normal pressure membrane separation device compares with prior art, has following beneficial effect:
separating and filtering sewage in the sewage tank by a separation membrane in the separation tank, wherein the reflux device reflows separated sludge to the sewage tank, so that pollutants in the environment treated by the membrane are reduced, and the backwashing of the membrane is realized to a certain extent; through ozone aeration, the strong oxidation effect of ozone is utilized to clean the separation membrane holes, the permeability of the separation membrane is kept, the ozone aeration has a certain digestion effect on pollutants in sewage, and the service life of the separation membrane is prolonged. The normal pressure membrane separation device with the structure has simple structure, and is particularly suitable for a sewage treatment device with compact space.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of a first embodiment of the atmospheric pressure membrane separation device of the present invention;
FIG. 2 is a schematic view showing the structure inside a separation tank in the first embodiment of the atmospheric membrane separation apparatus;
FIG. 3 is a schematic top view of a first embodiment of an atmospheric membrane separation unit;
FIG. 4 is a schematic view of the second embodiment of the atmospheric pressure membrane separation device of the present invention;
FIG. 5 is a schematic view showing the structure of the inside of the separation tank in the first embodiment of the atmospheric membrane separation apparatus.
In figure 1, a sewage tank; 2. a separation tank; 21. a separation membrane; 22. a water outlet; 23. an upper separator tank; 24. a lower separator tank; 31. an ozone generator; 32. an ozone tube; 33. an aeration rod; 41. an air pump; 42. a branch pipe; 43. a return pipe; 5. a first check valve; 6. a flow guide box; 61. a diversion trench; 71. a water pump; 72. a second one-way valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", and the like 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 device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1 to 5, the present embodiment provides an atmospheric membrane separation device, including a wastewater tank 1, a separation tank 2, an ozone device, and a reflux device, wherein: sewage in the sewage tank 1 can flow into the separation tank 2, and a separation membrane 21 is arranged in the separation tank 2 and is provided with a water outlet 22;
the ozone device is connected with the separation box 2 and comprises an ozone generator 31, an ozone pipe 32 and an aeration rod 33 which are connected with each other and used for aerating the separation membrane 21;
the return device is connected to the separation tank 2 and is used to return the solids separated by the separation membrane 21 to the waste water tank 1.
Wherein, above-mentioned sewage case 1 is often used for splendid attire sewage in the sewage treatment plant, and sewage case 1 is linked together through corresponding pipeline and separator box 2, and the effect of separator box 2 is to carrying out solid-liquid separation to the sewage that sewage case 1 flowed through, and wherein, be provided with separation membrane 21 in the separator box 2, the material, the structure etc. of this separation membrane 21 are the mature technology in this field, do not describe here in detail.
In order to make the sewage in the sewage tank 1 smoothly flow into the separation tank 2, as an alternative embodiment, referring to fig. 1 and 4, a first check valve 5 is provided between the sewage tank 1 and the separation tank 2, and the first check valve 5 can allow the sewage in the sewage tank 1 to flow into the separation tank 2.
Check valves are well known in the art and their construction is not described in detail herein. The above-mentioned first check valve 5 is provided to prevent sewage from flowing backward into the sewage tank 1.
The ozone device has the main functions that firstly, through ozone aeration, the strong oxidation effect of ozone is utilized to clean the holes of the separation membrane 21, and the permeability of the separation membrane 21 is kept; secondly, the ozone aeration has certain digestion function to the pollutants in the sewage, and the service life of the separation membrane 21 is prolonged. In order to further improve the cleaning effect on the pores of the separation membrane 21, as an alternative embodiment, the number of the aeration rods 33 in this embodiment is two, and the two aeration rods 33 are respectively located at the inner side and the outer side of the separation membrane 21. The two aeration rods 33 can clean the inner side and the outer side of the separation membrane 21, further improve the permeability of the separation membrane 21, and prolong the service life of the separation membrane.
As an alternative embodiment, referring to fig. 2 and 4, the separation tank 2 in the present embodiment includes an upper separation tank 23 and a lower separation tank 24 arranged one above the other, wherein the separation membrane 21 is vertically disposed in the upper separation tank 23, and two aeration rods 33 are respectively disposed in the upper separation tank 23 and the lower separation tank 24 so as to aerate both inner and outer sides of the separation membrane 21.
The upper and lower separating boxes are independently arranged, the ozone generator 31 is respectively connected with two aeration rods 33 through two branched ozone pipes 32, when the ozone generator 31 is started, the two aeration rods 33 can clean and aerate the membrane holes of the separating membrane 21 from the lower part and the side part of the separating membrane, and the aeration effect is further improved.
Two preferred embodiments are provided herein for the reflux unit, see in particular the following.
Example 2
The present embodiment is an improvement on the above-mentioned embodiments, and referring to fig. 1 to fig. 3, the reflux device in the present embodiment mainly adopts a mode of gas stripping reflux. Specifically, the backflow device in the present embodiment includes an air pump 41 and an air pipe, wherein the air pipe includes a branch pipe 42 and a backflow pipe 43, the branch pipe 42 connects the air pump 41 and the backflow pipe 43, one end of the backflow pipe 43 extends to the bottom of the separation tank 2, and the other end of the backflow pipe 43 extends to the top of the wastewater tank 1 and communicates with the wastewater tank 1.
The specific implementation process of the embodiment is as follows: sewage to be separated enters the box body of the separation box 2 from the sewage box 1 through the first one-way valve 5, under the action of water pressure, clear water enters the separation membrane 21 from the outside of the separation membrane 21 and then flows out of the water outlet 22, and sludge outside the membrane sinks and flows back to the sewage box 1 along the return pipe 43 through air lift under the action of the air pump 41; ozone generated by the ozone generator 31 enters the two sides of the separation membrane 21 through the ozone pipe 32 to be aerated, membrane holes are cleaned, and pollutants in the sewage are digested to a certain degree.
Example 3
The present embodiment is different from embodiment 2 in that the present embodiment adopts a pump backflow manner. Specifically, the reflux unit of this embodiment includes a water pump 71, a water pipe and a second check valve 72 disposed on the water pipe, wherein the water pipe connects the bottom of the separation tank 2 and the sewage tank 1, and when the water pump 71 is started, the separated sludge can flow back to the sewage tank 1 through the second check valve 72. Wherein, it should be understood that the sewage flows from the inside of the membrane to the outside of the membrane when the pump returns, and the filtered sludge is in the membrane. The flow direction of the pump backflow water is from the inside of the membrane to the outside of the membrane, and the flow direction of the gas stripping backflow water is from the outside of the membrane to the inside of the membrane. The sludge is in different positions in the two modes.
The specific implementation process of the embodiment is as follows: sewage to be separated enters the box body of the lower separation box 2 from the sewage box 1 through the first one-way valve 5, under the action of water pressure, clear water enters the separation membrane 21 from the inside of the separation membrane 21 and then flows out from the water outlet 22; after the sludge in the membrane sinks, the sludge is transferred to the sewage tank 1 through the second one-way valve 72 under the action of the water pump 71; ozone generated by the ozone generator 31 enters the two sides of the separation membrane 21 through the ozone pipe 32 to be aerated, membrane holes are cleaned, and pollutants in the sewage are digested to a certain degree.
Since the ozone device in the above two embodiments generates foam in the separation tank during aeration, in order to prevent the overflow of the separation tank 2, as an alternative embodiment, as shown in fig. 1-5, a flow guide device is provided at the top of the separation tank 2, and is respectively communicated with the separation tank 2 and the sewage tank 1 for guiding the foam generated by the aeration of the ozone device into the sewage tank 1.
The flow guide device can guide the foam generated by ozone aeration into the sewage tank 1 to prevent overflow.
As an alternative embodiment, referring to fig. 1-5, the diversion device includes a diversion box 6 communicated with the top of the separation box 2, the diversion box 6 is higher than the top of the sewage box 1, and a diversion trench 61 is arranged on one side of the diversion box 6 close to the sewage box 1, and the diversion trench 61 extends to the upper part of the sewage box 1.
When foam is generated in the separation tank 2 due to the aeration of the ozone device, the foam enters the diversion tank 6 from the top of the separation tank 2 and overflows into the sewage tank 1 from the diversion groove 61 on the diversion tank 6.
In an alternative embodiment, the material of the separation membrane 21 is polyethylene, polypropylene, polytetrafluoroethylene, ceramic, or stainless steel.
In an alternative embodiment, the separation membrane 21 in the separation chamber 2 has a pore diameter of 1 to 1000 μm. The separation membrane 21 having the above pore diameter has a good separation effect.
In the normal pressure membrane separation device in the embodiment, sewage to be separated enters the separation box 2 through the first one-way valve 5, and the sewage is separated by the separation membrane 21 under the action of water pressure; the separated clear water flows out from the water outlet 22, and the sludge flows back to the sewage tank 1 through air stripping or a pump under the action of the air pump 41 or the water pump 71; the two sides of the separation membrane 21 of the separation box 2 are provided with aeration rods 33 for carrying out ozone aeration, membrane holes are cleaned by utilizing the strong oxidation effect of ozone, the permeability of the membrane is kept, foam generated by the ozone aeration is guided into the sewage tank 1 by a flow guide device arranged at the top of the separation box 2, and the ozone aeration has a certain digestion effect on pollutants in sewage. The normal-pressure membrane separation device in the embodiment has a simple structure, is easy to process, and is particularly suitable for a sewage treatment device with a compact space.
The particular features, structures, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a normal pressure membrane separation device which characterized in that, includes sewage case, separator box, ozone device and reflux unit, wherein: sewage in the sewage tank can flow into the separation tank, a separation membrane is arranged in the separation tank, and a water outlet is formed in the wall of the separation tank;
the ozone device is connected with the separation box and comprises an ozone generator, an ozone pipe and an aeration rod, wherein the ozone generator, the ozone pipe and the aeration rod are connected with each other;
the backflow device is connected with the separation box and is used for enabling the solid separated by the separation membrane to flow back into the sewage tank.
2. The atmospheric-pressure membrane separation device of claim 1, wherein a first check valve is arranged between the sewage tank and the separation tank, and the first check valve can allow sewage in the sewage tank to flow into the separation tank.
3. The atmospheric-pressure membrane separation device according to claim 1 or 2, wherein the number of the aeration rods is two, and the two aeration rods are respectively located at the inner side and the outer side of the separation membrane.
4. The atmospheric-pressure membrane separation device according to claim 3, wherein the separation tank comprises an upper separation tank and a lower separation tank which are arranged one above the other, wherein the separation membrane is vertically disposed in the upper separation tank, and two aeration rods are respectively located in the upper separation tank and the lower separation tank so as to aerate the inner side and the outer side of the separation membrane.
5. The atmospheric membrane separation device of claim 1, wherein the return device comprises an air pump and an air pipe, wherein the air pipe comprises a branch pipe and a return pipe, the branch pipe connects the air pump and the return pipe, one end of the return pipe extends to the bottom of the separation tank, and the other end of the return pipe extends to the top of the sewage tank and is communicated with the sewage tank.
6. The atmospheric-pressure membrane separation device according to claim 1, wherein the backflow device comprises a water pump, a water pipe and a second check valve arranged on the water pipe, wherein the water pipe is connected with the bottom of the separation tank and the sewage tank, and when the water pump is started, separated sludge can flow back into the sewage tank through the second check valve.
7. The atmospheric pressure membrane separation device according to claim 1, wherein a flow guide device is provided at a top of the separation tank, the flow guide device being communicated with the separation tank and the wastewater tank, respectively, for guiding the bubbles generated by the aeration of the ozone device into the wastewater tank.
8. The atmospheric-pressure membrane separation device of claim 7, wherein the flow guide device comprises a flow guide box communicated with the top of the separation box, the height of the flow guide box is higher than the top end of the sewage tank, and a flow guide groove is formed in one side of the flow guide box close to the sewage tank and extends to the upper part of the sewage tank.
9. The atmospheric-pressure membrane separation device of claim 1, wherein the separation membrane is made of polyethylene, polypropylene, polytetrafluoroethylene, ceramic or stainless steel.
10. The atmospheric-pressure membrane separation device according to claim 1, wherein the pore diameter of the separation membrane is 1 to 1000 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020834608.5U CN212269545U (en) | 2020-05-18 | 2020-05-18 | Normal pressure membrane separation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020834608.5U CN212269545U (en) | 2020-05-18 | 2020-05-18 | Normal pressure membrane separation device |
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| CN212269545U true CN212269545U (en) | 2021-01-01 |
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| CN202020834608.5U Active CN212269545U (en) | 2020-05-18 | 2020-05-18 | Normal pressure membrane separation device |
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| CN (1) | CN212269545U (en) |
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- 2020-05-18 CN CN202020834608.5U patent/CN212269545U/en active Active
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