A membrane absorption treatment device for high ammonia nitrogen wastewater treatment

Abstract

The present invention provides a membrane absorption treatment device for high ammonia nitrogen wastewater treatment, comprising: a base, on which a rotating chamber is arranged and is rotationally connected to the rotating chamber; an annular support permeable shell is arranged inside the rotating chamber; a filter membrane is filled in the support permeable shell; a partition plate and a bottom plate are arranged in the middle of the support permeable shell, the partition plate is fixed in the middle of the support permeable shell, and its edge is sealed and fixed to the inner wall of the support permeable shell; the bottom plate is fixed to the bottom of the support permeable shell; a water inlet pipe penetrates through the partition plate, the water inlet pipe is coaxially arranged with the rotating chamber, and the upper end of the water inlet pipe penetrates out of the outer wall of the rotating chamber and is used for connecting with an external water source to be filtered; a driving component for driving the rotating chamber to rotate around the center of the rotating chamber and be rotationally connected to the base is further arranged inside the base; a plurality of drain holes for discharging the filtered liquid are formed in the outer wall of the rotating chamber. By means of this technical solution, the membrane technology is adopted, and through the mutual cooperation of pressure and centrifugal force, the filtration efficiency of sewage is accelerated.

Description

Technical Field

[0001] The present invention generally relates to the field of high ammonia nitrogen wastewater treatment, and particularly to a membrane absorption treatment device for high ammonia nitrogen wastewater treatment. Background Art

[0002] Ammonia nitrogen wastewater mainly comes from chemical fertilizers, coking, petrochemical, pharmaceutical, food, landfill sites, etc. A large amount of ammonia nitrogen wastewater discharged into water bodies not only causes water eutrophication and makes the water body black and smelly, increasing the difficulty and cost of water treatment, but also has a toxic effect on humans and organisms.

[0003] For the treatment process of ammonia nitrogen wastewater, there are various treatment processes such as biological methods and physical and chemical methods. Among them, for the treatment of high-concentration ammonia nitrogen wastewater, the traditional methods are acid liquid absorption method and stripping method. The acid liquid absorption method uses acidic absorption liquids such as hydrochloric acid, sulfuric acid, and nitric acid to react with ammonia nitrogen in the wastewater, and the equipment required is a chemical absorption tower; the stripping method utilizes the volatility of ammonia gas, passes hot air to strengthen the gas-liquid phase mass transfer, and promotes ammonia gas to escape from the wastewater. To achieve this function, a stripping tower needs to be built.

[0004] Among them, physical treatment methods can adopt the treatment method of filtration membranes or nanofiltration membranes, using high pressure to drive the wastewater through a dense membrane (the pore size of the reverse osmosis membrane is <1 nm, and the pore size of the nanofiltration membrane is 1-10 nm), so as to intercept dissolved ions (such as ) and small molecule organic matters.

[0005] The inventor believes that the traditional pressurized permeation method not only has a relatively high pressurization cost, but also has a relatively low filtration efficiency. Summary of the Invention

[0006] In view of the problems existing in the above-mentioned prior art according to the present invention, a membrane absorption treatment device for high ammonia nitrogen wastewater treatment is provided, including: a base, on which a rotating chamber is provided and is rotatably connected to the rotating chamber; an annular support permeable shell is arranged inside the rotating chamber; a filter membrane is filled in the support permeable shell; a partition plate and a bottom plate are arranged in the middle of the support permeable shell, the partition plate is fixed in the middle of the support permeable shell, and its edge is hermetically fixed to the inner wall of the support permeable shell; the bottom plate is fixed at the bottom of the support permeable shell, and its edge is hermetically fixed to the inner wall of the support permeable shell; a water inlet pipe is penetrated through the partition plate, the water inlet pipe is coaxially arranged with the rotating chamber, and the upper end of the water inlet pipe penetrates out of the outer wall of the rotating chamber and is used for connecting with an external sewage pipeline; a driving component for driving the rotating chamber to rotate around the center of the rotating chamber and be rotatably connected to the base is also arranged inside the base; a plurality of drain holes for discharging the filtered liquid are arranged on the outer wall of the rotating chamber. With the above technical features, the sewage is introduced into the space between the partition plate and the bottom plate through the water inlet pipe by a pressurizing device, and the rotating chamber is driven by the driving component. On the one hand, the sewage passes through the filter membrane under the action of pressure, and the filtered liquid is discharged through the drain holes after passing through the filtering action of the filter membrane. On the other hand, the high-speed rotating rotating chamber generates centrifugal force to drive the liquid to impact the filter membrane on the periphery, so that the liquid before filtration is simultaneously affected by water pressure and centrifugal force, greatly accelerating the efficiency of passing through the filter membrane and improving the overall filtration efficiency.

[0007] In some embodiments, a plurality of communication ports are arranged on the periphery of the water inlet pipe. Thus, most of the sewage will enter the space between the partition plate and the bottom plate, and the arrangement of the communication ports enables part of the sewage to enter the upper space of the partition plate, and under the action of centrifugal force, it is squeezed towards the filter membrane on the periphery and filtered through the filter membrane, thereby accelerating the overall filtration efficiency of the device. Moreover, the arrangement of the communication ports will not affect the overall center of gravity distribution of the device, making the rotation of the selection bin more stable.

[0008] In some embodiments, the diameter of the upper port of the support permeable shell is larger than the diameter of the lower port of the support permeable shell. Thus, with the high-speed rotation of the rotating chamber, due to the inclined arrangement of the support permeable shell, under the action of centrifugal force, it will drive the liquid to displace along the inner wall of the support permeable shell towards the top of the support permeable shell, thereby increasing the contact efficiency between the sewage and the filter membrane and further accelerating the sewage filtration efficiency.

[0009] In some embodiments, a plurality of annular flow guiding plates are arranged at intervals along the height direction of the inner wall of the support permeation shell, and the flow guiding plates are inclined towards the bottom direction of the support permeation shell. Thus, during the process of sewage flowing along the inner wall of the support permeation shell, due to the obstruction of the flow guiding plates, part of the liquid will be retained in the space formed by the flow guiding plates and the support permeation shell. Under the action of centrifugal force, it helps the sewage to pass through the filter membrane, improving the efficiency of the sewage passing through the filter membrane; moreover, due to the inclined setting of the flow guiding plates, it also helps the permeated sewage to flow upward through the back side of the flow guiding plates.

[0010] In some embodiments, there is an annular flow guiding channel left between the upper end surface of the support permeation shell and the top of the rotating chamber, and a waste water tank rotatably connected to the rotating chamber is arranged on the outer peripheral side of the rotating chamber, and the waste water tank is communicated with the flow guiding channel. Thus, as the rotating chamber rotates, the sewage in the upper region of the partition plate may not pass through the reverse osmosis membrane and accumulate in the top region of the rotating chamber, thus affecting the rotational stability of the rotating chamber. Therefore, the setting of the flow guiding channel can timely divert the unfiltered sewage to the waste water tank, thereby ensuring the stability of the overall center of gravity of the rotating chamber.

[0011] In some embodiments, an annular filter tank is arranged on the outer peripheral side of the rotating chamber to receive the liquid discharged from the drain holes, and the filter tank is fixedly connected to the base. Thus, the filter tank plays a role in collecting the filtered liquid, and the filter tank is rotationally connected to the rotating chamber, while also ensuring the rotational stability of the rotating chamber.

[0012] In some embodiments, both the inner wall and the outer wall of the support permeation shell are of a mesh structure. Thus, on the one hand, the support permeation shell plays a role in fixing the filter membrane, and at the same time, it does not affect the direct contact between the sewage and the filter membrane, ensuring the normal operation of the filtration work.

[0013] In some embodiments, the driving assembly includes a driving motor fixed in the base, a first transmission wheel coaxially fixed to the output shaft of the driving motor, a second transmission wheel coaxially fixed to the bottom of the rotating chamber, and a transmission belt sleeved on both the first transmission wheel and the second transmission wheel. Thus, the staff can adjust the rotational speed of the rotating chamber by adjusting the diameter ratio of the first transmission wheel and the second transmission wheel, making the operation of the driving motor more stable.

[0014] It should be understood that the content described in the Summary of the Invention section is not intended to limit the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. shows the overall structural schematic diagram of a membrane absorption treatment device for high ammonia nitrogen wastewater treatment according to an embodiment of the present invention;

[0016] Figure 2 Shows a cross-sectional view of the internal structure of a membrane absorption treatment device for high ammonia nitrogen wastewater treatment according to an embodiment of the present invention;

[0017] Figure 3 Shows a schematic diagram of the internal structure of a rotating chamber in a membrane absorption treatment device for high ammonia nitrogen wastewater treatment according to an embodiment of the present invention;

[0018] Figure 4 Shows a schematic diagram of a partial structure inside the rotating chamber of a membrane absorption treatment device for high ammonia nitrogen wastewater treatment according to an embodiment of the present invention.

[0019] Symbol description

[0020] 1. Base; 11. Water filtration and drainage pipe; 12. Sewage drainage pipe; 2. Rotating chamber; 21. Water inlet pipe; 211. Communication port; 22. Rotating shaft; 23. Drainage hole; 3. Driving assembly; 31. Driving motor; 32. First transmission wheel; 33. Second transmission wheel; 34. Transmission belt; 4. Support permeation shell; 41. Filter membrane; 42. Bottom plate; 43. Partition plate; 44. Sealing area; 45. Opening area; 46. Flow guide plate; 5. Flow guide channel; 51. Sewage drainage outlet; 6. Wastewater tank; 7. Filter tank. Detailed implementation manners

[0021] Next, a detailed description will be given of the preferred embodiments (or implementation manners) of the present invention with reference to the accompanying drawings.

[0022] Next, refer to Figures 1 - 4 to describe a membrane absorption treatment device for high ammonia nitrogen wastewater treatment of the present invention.

[0023] Figure 1 Shows a schematic diagram of the overall structure of a membrane absorption treatment device for high ammonia nitrogen wastewater treatment according to an embodiment of the present invention. Refer to Figure 1 As shown, a membrane absorption treatment device for high ammonia nitrogen wastewater treatment provided in this embodiment includes a base 1. A rotating chamber 2 is provided inside the base 1. The rotating chamber 2 is rotationally connected to the base 1 around its central axis. A water inlet pipe 21 is provided at the top of the rotating chamber 2 for connecting to external pressurized sewage, and a water filtration and drainage pipe 11 and a sewage drainage pipe 12 are respectively provided outside the base 1.

[0024] Figure 2 Shows a cross-sectional view of the internal structure of a membrane absorption treatment device for high ammonia nitrogen wastewater treatment according to an embodiment of the present invention. Refer to Figure 2As shown, the rotating bin 2 is columnar, and a rotating shaft 22 is coaxially and fixedly connected to the lower end surface thereof. The lower end of the rotating shaft 22 is supported on the bottom of the base 1 and is rotationally connected to the base 1 around the center of the rotating shaft 22. A driving assembly 3 for driving the rotating shaft 22 to rotate in the base 1 is arranged in the base 1. The driving assembly 3 includes a driving motor 31 fixed in the base 1. The driving motor 31 is vertically arranged, and its output shaft faces the bottom of the base 1. A first transmission wheel 32 is coaxially and fixedly connected to the output shaft of the driving motor 31, and a second transmission wheel 33 is coaxially and fixedly connected to the above-mentioned rotating shaft 22. A plurality of transmission belts 34 are simultaneously sleeved on the first transmission wheel 32 and the second transmission wheel 33. The driving motor 31 can drive the rotating bin 2 to rotate at a high speed in the base 1.

[0025] Figure 3 The figure shows a schematic diagram of the internal structure of the rotating bin 2 in a membrane absorption treatment device for treating high-ammonia-nitrogen wastewater according to an embodiment of the present invention. Refer to Figure 3 As shown, a support permeation shell 4 is arranged in the rotating bin 2. The support permeation shell 4 is annular and is coaxially fixed with the rotating bin 2. The upper end of the support permeation shell 4 is open, and both its inner annular wall and outer annular wall are mesh structures. And a filter membrane 41 is filled inside the support permeation shell 4. The filter membrane 41 can be a reverse osmosis membrane (the pore diameter of the permeation membrane is less than 1 nanometer) or a nanofiltration membrane (the pore diameter of the nanofiltration membrane is 1-10 nanometers).

[0026] A bottom plate 42 and a partition plate 43 are arranged in the middle space of the support permeation shell 4. The bottom plate 42 is horizontally arranged at the bottom of the support permeation shell 4 and is hermetically and fixedly connected to the inner annular inner wall of the support permeation shell 4; the partition plate 43 is horizontally arranged in the middle of the support permeation shell 4 and is hermetically and fixedly connected to the inner annular inner wall of the support permeation shell 4, so that a sealed area 44 at the bottom and an open area 45 above are formed in the middle area of the support permeation shell 4. The above-mentioned water inlet pipe 21 is coaxially arranged with the support permeation shell 4, and its lower end penetrates through the partition plate 43 and is hermetically and fixedly connected to the partition plate 43.

[0027] When the device works, the driving assembly 3 drives the rotating bin 2 to rotate at a high speed. The upper end of the water inlet pipe 21 is connected to an external sewage pipeline and is hermetically and rotationally connected to the sewage pipeline. High-pressure sewage is introduced into the sewage pipeline, and the sewage enters the sealed area 44. Under the action of water pressure, the sewage is pressed against the filter membrane 41 and passes through the filter membrane 41, so that the filtered liquid is located on the other side of the support permeation shell 4. At the same time, the high-speed rotation of the rotating bin 2 causes the high-pressure liquid in the sealed area 44 to generate a centrifugal force, increasing the pressing force on the filter membrane 41, thereby accelerating the efficiency of the sewage passing through the filter membrane 41 and further improving the sewage filtration effect. Moreover, since the sewage in the rotating bin 2 is concentrated in the bottom area, the center of gravity in the rotating bin 2 is located at the bottom of the rotating bin 2 to ensure the stability of the rotation of the rotating bin 2.

[0028] A plurality of communication ports 211 are evenly arranged on the circumferential side of the water inlet pipe 21, so that part of the liquid flowing into the water inlet pipe 21 will be discharged into the opening area 45 through the communication ports 211. With the high-speed rotation of the support permeable shell 4, the sewage will gather towards the filter membrane 41 and squeeze the filter membrane 41. Under the action of centrifugal force, the sewage passes through the filter membrane 41, thus realizing the filtering effect of the opening area 45 on the sewage. Since the sewage in the opening area 45 is limited, it will not affect the center of gravity distribution in the rotating bin 2, thus ensuring the stability of the rotation of the rotating bin 2.

[0029] In some embodiments, the diameter of the upper port of the support permeable shell 4 is larger than that of the lower port, so that the inner annular inner wall of the support permeable shell 4 forms a structure inclined from the bottom to the top. The sewage flowing into the opening area 45 will slide upward along the inner wall of the support permeable shell 4 under the action of centrifugal force, thus increasing the contact area between the sewage and the filter membrane 41 and indirectly improving the filtering efficiency of the sewage. Moreover, due to the high-speed rotation of the rotating bin 2 and the inclined setting of the support permeable shell 4, during the flow of the sewage, it will drive the sewage to flow obliquely upward, thus increasing the travel of the sewage penetrating the filter membrane 41 and greatly improving the filtering effect of the sewage.

[0030] In some embodiments, the opening direction of each communication port 211 faces the direction of the partition plate 43, so that the liquid discharged from the sewage through the communication port 211 will be evenly sprayed towards the bottom area of the opening area 45, so that most of the sewage will flow from the bottom to the top along the inner wall of the support permeable shell 4 and be squeezed and filtered, ensuring the full contact between the sewage and the filter membrane 41.

[0031] In some embodiments, a plurality of guide plates 46 are arranged on the inner annular inner wall of the support permeable shell 4. The guide plates 46 are annular and are evenly distributed at intervals along the height direction of the support permeable shell 4, and the guide plates 46 are all inclined towards the direction of the partition plate 43. When the sewage flows along the inner wall of the support permeable shell 4, part of the liquid will be restricted in the space between the guide plate 46 and the inner wall of the support permeable shell 4. With the increase of centrifugal force, the guide plate 46 indirectly applies an extrusion force, accelerating the efficiency of the sewage passing through the filter membrane 41. Due to the inclined setting of the guide plate 46, it will not affect the flow of the liquid, thus not affecting the filtering efficiency of most of the liquid.

[0032] Figure 4The figure shows a schematic diagram of the local structure inside the rotating chamber 2 of a membrane absorption treatment device for high ammonia nitrogen wastewater treatment according to an embodiment of the present invention. To prevent the sewage in the opening area 45 from not passing through the filtration of the filtration membrane 41 and accumulating at the top edge of the opening area 45, thus affecting the overall center of gravity distribution inside the rotating chamber 2, a diversion channel 5 for accommodating the flow of unfiltered sewage is left between the top area of the support permeable shell 4 and the upper inner wall of the rotating chamber 2. The diversion channel 5 is not connected to the outer ring wall of the support permeable shell 4. A plurality of sewage drainage ports 51 communicating with the external environment of the rotating chamber 2 are provided on the end-side annular inner wall of the diversion channel 5. An annular wastewater tank 6 is provided outside the rotating chamber 2. The wastewater tank 6 is fixed to the base 1 and is in communication with the sewage drainage ports 51. As the rotating chamber 2 rotates, the unfiltered sewage will flow into the diversion channel 5 under the action of centrifugal force and flow into the wastewater tank 6 through the sewage drainage ports 51, thus playing a role in recovering the sewage. One end of the above sewage drain pipe 12 is in communication with the wastewater tank 6, and the other end can lead to the source of the sewage and can be used for filtering the sewage again. The timely discharge of the unfiltered sewage reduces the impact on the center of gravity of the rotating chamber 2, makes the rotation of the rotating chamber 2 more stable, and also ensures the filtration efficiency of the sewage.

[0033] In some embodiments, a plurality of balls are rotatably connected to the inner annular wall of the wastewater tank 6, and each ball abuts against the outer ring wall of the rotating chamber 2, thus playing a supporting role for the rotating chamber 2 and ensuring the stability of the rotation of the rotating chamber 2.

[0034] A plurality of drainage holes 23 are evenly provided on the inner annular wall of the rotating chamber 2 opposite to the outer ring wall of the support permeable shell 4, ensuring the smooth transfer of the filtered liquid to the outside of the rotating chamber 2. A filtration tank 7 coaxial with the rotating chamber 2 is provided outside the rotating chamber 2. The filtration tank 7 is fixed to the wastewater tank 6 and is also fixedly connected to the base 1. When the rotating chamber 2 rotates for filtration, the sewage passing through the filtration membrane 41 enters the filtration tank 7 through the drainage holes 23. One end of the above water filtration drain pipe 11 is in communication with the filtration tank 7, facilitating the transfer of the filtered sewage.

[0035] In some embodiments, a plurality of balls are rotatably connected to the inner annular wall of the filtration tank 7, and each ball abuts against the outer ring wall of the rotating chamber 2, thus playing a supporting role for the rotating chamber 2 and ensuring the stability of the rotation of the rotating chamber 2.

[0036] In the description of this specification, terms such as "connection", "installation", and "fixation" should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A membrane absorption treatment device for treating high-ammonia nitrogen wastewater, characterized in that: include: Base (1), A rotating bin (2) is provided on the base (1) and is rotatably connected to the rotating bin (2); An annular supporting permeable shell (4) is arranged inside the rotating chamber (2); A filter membrane (41) is filled in the supporting permeable shell (4), and the diameter of the upper port of the supporting permeable shell (4) is greater than the diameter of the lower port of the supporting permeable shell (4); A partition plate (43) and a bottom plate (42) are arranged in the middle of the supporting permeable shell (4); the partition plate (43) is fixed to the middle of the supporting permeable shell (4), and its edge is sealed and fixed to the inner wall of the supporting permeable shell (4); the bottom plate (42) is fixed to the bottom of the supporting permeable shell (4), and its edge is sealed and fixed to the inner wall of the supporting permeable shell (4); A water inlet pipe (21) is provided on the partition plate (43), the water inlet pipe (21) is coaxially arranged with the rotating bin (2), the upper end of the water inlet pipe (21) passes through the outer wall of the rotating bin (2) and is used to be connected to an external sewage pipe, and a plurality of communication ports (211) are provided on the peripheral side of the water inlet pipe (21); A driving assembly (3) is also provided in the base (1) for driving the rotating bin (2) to be rotatably connected to the base (1) around the center of the rotating bin (2); The outer wall of the rotary bin (2) is provided with a plurality of drainage holes (23) for discharging filtered liquid; The inner wall of the supporting permeable shell (4) is provided with a plurality of annular guide plates (46) at intervals along its height direction, and the guide plates (46) are inclined toward the bottom direction of the supporting permeable shell (4).

2. A membrane absorption treatment device for high ammonia nitrogen wastewater treatment according to claim 1, characterized in that: An annular flow guide channel (5) is left between the upper end surface of the supporting permeable shell (4) and the top of the rotating chamber (2); a waste water trough (6) rotatably connected to the rotating chamber (2) is provided on the outer peripheral side of the rotating chamber (2); and the waste water trough (6) and the flow guide channel (5) are in communication with each other.

3. A membrane absorption treatment device for treating high ammonia nitrogen wastewater according to claim 2, characterized in that: An annular filter groove (7) is provided on the outer peripheral side of the rotary bin (2) for receiving liquid discharged from the drainage hole (23), and the filter groove (7) is fixedly connected to the base (1).

4. The membrane absorption treatment device for treating high-ammonia nitrogen wastewater according to claim 1, characterized in that: The inner wall and the outer wall of the supporting permeable shell (4) are both mesh structures.

5. The membrane absorption treatment device for treating high-ammonia nitrogen wastewater according to claim 1, characterized in that: The driving assembly (3) comprises a driving motor (31) fixed in the base (1), a first transmission wheel (32) coaxially fixed to the output shaft of the driving motor (31), a second transmission wheel (33) coaxially fixed to the bottom of the rotating bin (2), and a transmission belt (34) simultaneously mounted on the first transmission wheel (32) and the second transmission wheel (33).

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