Membrane absorption treatment device for high-ammonia-nitrogen wastewater treatment

Abstract

The invention provides a membrane absorption treatment device for high-ammonia-nitrogen wastewater treatment, which comprises: a base, which is provided with a rotating bin and is rotatably connected with the rotating bin; an annular supporting permeation shell is arranged in the rotary bin; the supporting permeation shell is filled with a filtering membrane; a partition plate and a bottom plate are arranged in the middle of the supporting permeation shell, the partition plate is fixed in the middle of the supporting permeation shell, and the edge is hermetically fixed with the inner wall of the supporting permeation shell; the bottom plate is fixed at the bottom of the supporting permeation shell; a water inlet pipe penetrates through the partition plate, the water inlet pipe and the rotating bin are coaxially arranged, and the upper end of the water inlet pipe penetrates out of the outer wall of the rotating bin and is used for being connected with an external water source needing to be filtered; a driving assembly for driving the rotating bin to be rotationally connected with the base around the center of the rotating bin is further arranged in the base; a plurality of drain holes for draining filtered liquid are formed in the outer wall of the rotary bin. According to the technical scheme, the membrane technology is adopted, and the sewage filtering efficiency is improved through mutual cooperation of pressure and centrifugal force.

Description

Technical Field

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

[0002] Ammonia nitrogen wastewater mainly comes from fertilizers, coking, petrochemicals, pharmaceuticals, food, landfills, etc. A large amount of ammonia nitrogen wastewater discharged into water bodies not only causes eutrophication of water bodies and makes the water bodies black and smelly, but also increases the difficulty and cost of water treatment, and even has toxic effects on people and organisms.

[0003] There are various treatment processes for ammonia nitrogen wastewater, such as biological method and physicochemical method. Among them, the traditional methods for treating high-concentration ammonia nitrogen wastewater are acid absorption method and air stripping method. The acid 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 air stripping method uses the volatility of ammonia and passes hot air to strengthen the gas-liquid phase material exchange, which promotes the escape of ammonia from the wastewater. To achieve this function, a air stripping tower needs to be built.

[0004] Among them, physical treatment methods can use filtration membrane or nanofiltration membrane treatment, using high pressure to drive wastewater through dense membrane (reverse osmosis membrane pore size <1 nm, nanofiltration membrane pore size 1-10 nm), so as to intercept soluble ions (such as ) and small organic molecules.

[0005] The inventor believes that the traditional pressurized infiltration method not only has a high pressurization cost but also has a 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 treating high-ammonia nitrogen wastewater is provided, comprising: a base, on which a rotating bin is arranged and rotatably connected to the rotating bin; an annular supporting permeable shell is arranged inside the rotating bin; a filter membrane is filled in the supporting permeable shell; a partition plate and a bottom plate are arranged in the middle of the supporting permeable shell, the partition plate is fixed to the middle of the supporting permeable shell, and its edge is sealed and fixed to the inner wall of the supporting permeable shell; the bottom plate is fixed to the bottom of the supporting permeable shell, and its edge is sealed and fixed to the inner wall of the supporting permeable shell; a water inlet pipe is passed through the partition plate, the water inlet pipe is coaxially arranged with the rotating bin, and the upper end of the water inlet pipe passes through the outer wall of the rotating bin and is used to be interconnected with an external sewage pipeline; a driving component is also arranged in the base to drive the rotating bin to be rotatably connected to the base around the center of the rotating bin; a plurality of drainage holes for discharging filtered liquid are opened on the outer wall of the rotating bin. With the above-mentioned technical features, sewage is passed through the water inlet pipe through the pressurized equipment and poured into the space between the partition plate and the bottom plate. 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 drainage hole through the filtering effect 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 surrounding side, so that the liquid before filtration is affected by water pressure and centrifugal force at the same time, which greatly speeds up the efficiency of passing through the filter membrane and improves the overall filtration efficiency.

[0007] In some embodiments, a plurality of communication ports are provided around the water inlet pipe, so that most of the sewage will flow into the space between the partition plate and the bottom plate, and the opening of the communication ports allows part of the sewage to enter the upper space of the partition plate, and be squeezed toward the filter membrane on the peripheral side under the action of centrifugal force, and filtered through the filter membrane, thereby speeding up the overall filtering efficiency of the device, and the opening of the communication ports will not affect the overall center of gravity distribution of the device, making the rotation of the optional bin more stable.

[0008] In some embodiments, the diameter of the upper port of the supporting permeable shell is larger than the diameter of the lower port of the supporting permeable shell. Therefore, as the rotating chamber rotates at a high speed, due to the inclined setting of the supporting permeable shell, under the action of centrifugal force, the liquid will follow the inner wall of the supporting permeable shell and move toward the top of the supporting permeable shell, thereby increasing the contact efficiency between the sewage and the filter membrane, and further accelerating the efficiency of sewage filtration.

[0009] In some embodiments, the inner wall of the supporting permeable shell is provided with a plurality of annular guide plates at intervals along its height direction, and the guide plates are inclined toward the bottom direction of the supporting permeable shell. Thus, in the process of sewage following the inner wall of the supporting permeable shell, due to the shielding of the guide plates, part of the liquid will be retained in the space formed by the guide plates and the supporting permeable shell, which helps the sewage pass through the filter membrane under the action of centrifugal force, thereby improving the efficiency of sewage passing through the filter membrane; and due to the inclined setting of the guide plates, it also helps the unpermeated sewage to flow upward through the back side of the guide plates.

[0010] In some embodiments, an annular flow guide channel is left between the upper end surface of the supporting permeable shell and the top of the rotating bin, and a wastewater tank is provided on the outer peripheral side of the rotating bin, which is rotatably connected to the rotating bin, and the wastewater tank and the flow guide channel are interconnected. Therefore, as the rotating bin rotates, the sewage in the upper area of ​​the partition plate may not pass through the filtration of the reverse osmosis membrane and accumulate in the top area of ​​the rotating bin, thereby affecting the stability of the rotation of the rotating bin. Therefore, the setting of the flow guide channel can timely guide the sewage that has not passed the filtration to the wastewater tank, thereby ensuring the stability of the overall center of gravity of the rotating bin.

[0011] In some embodiments, an annular filter groove is provided on the outer peripheral side of the rotating bin to receive the liquid discharged from the drainage hole, and the filter groove is fixedly connected to the base. Thus, the filter groove plays a role in collecting the filtered liquid, and the filter groove is rotatably connected to the rotating bin, which also ensures the stability of the rotation of the rotating bin.

[0012] In some embodiments, the inner wall and the outer wall of the supporting permeable shell are both mesh structures. Therefore, on the one hand, the supporting permeable shell plays a role in fixing the filter membrane, and at the same time, it will not affect the direct contact between the sewage and the filter membrane, thus 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 bin, and a transmission belt mounted on the first transmission wheel and the second transmission wheel. Therefore, the staff can adjust the ratio of the wheel diameters of the first transmission wheel and the second transmission wheel, and also adjust the rotation speed of the rotating bin, so that the driving motor can operate more stably.

[0014] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present disclosure, nor are they intended 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 A schematic diagram showing the overall structure of a membrane absorption treatment device for treating high-ammonia nitrogen wastewater according to an embodiment of the present invention is shown; Figure 2 A cross-sectional view showing the internal structure of a membrane absorption treatment device for treating high-ammonia nitrogen wastewater according to an embodiment of the present invention; Figure 3 A schematic diagram of the internal structure of a rotary bin in a membrane absorption treatment device for treating high-ammonia nitrogen wastewater according to an embodiment of the present invention is shown; Figure 4 A schematic diagram of the local structure inside a rotating bin in a membrane absorption treatment device for treating high-ammonia nitrogen wastewater according to an embodiment of the present invention is shown.

[0016] Explanation of symbols 1. Base; 11. Water filter drain pipe; 12. Sewage drain pipe; 2. Rotating chamber; 21. Water inlet pipe; 211. Connecting port; 22. Rotating shaft; 23. Drain hole; 3. Driving assembly; 31. Driving motor; 32. First transmission wheel; 33. Second transmission wheel; 34. Driving belt; 4. Supporting permeation shell; 41. Filter membrane; 42. Bottom plate; 43. Partition plate; 44. Sealing area; 45. Opening area; 46. Guide plate; 5. Guide channel; 51. Sewage drain port; 6. Wastewater tank; 7. Filter tank. DETAILED DESCRIPTION

[0017] Hereinafter, preferred embodiments (or implementation modes) of the present invention will be described in detail with reference to the accompanying drawings.

[0018] Reference below Figure 1-Figure 4 To describe a membrane absorption treatment device for high ammonia nitrogen wastewater treatment of the present invention.

[0019] Figure 1 The overall structure diagram of a membrane absorption treatment device for treating high-ammonia nitrogen wastewater according to an embodiment of the present invention is shown. 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 arranged in the base 1, the rotating chamber 2 is rotatably connected to the base 1 around its central axis, and a water inlet pipe 21 is arranged on the top of the rotating chamber 2 for connecting external pressurized sewage, and a filtered water drain pipe 11 and a sewage drain pipe 12 are respectively arranged on the outside of the base 1.

[0020] Figure 2 The internal structure cross-sectional view of a membrane absorption treatment device for treating high-ammonia nitrogen wastewater according to an embodiment of the present invention is shown. Figure 2As shown, the rotating bin 2 is columnar, and a rotating shaft 22 is coaxially fixed to its lower end surface. The lower end of the rotating shaft 22 is supported on the bottom of the base 1 and is connected to the base 1 for rotation around the center of the rotating shaft 22. A driving assembly 3 is provided in the base 1 to drive the rotating shaft 22 to rotate 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 fixed to the output shaft of the driving motor 31, and a second transmission wheel 33 is coaxially fixed to the 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.

[0021] Figure 3 The internal structure diagram of the rotary chamber 2 in a membrane absorption treatment device for treating high-ammonia nitrogen wastewater according to an embodiment of the present invention is shown. Figure 3 As shown, a supporting permeable shell 4 is arranged in the rotating chamber 2. The supporting permeable shell 4 is annular and is coaxially fixed with the rotating chamber 2. The upper end of the supporting permeable shell 4 is open, and its inner annular wall and outer annular wall are both mesh structures, and a filter membrane 41 is filled inside the supporting permeable shell 4. The filter membrane 41 can be a reverse osmosis membrane (the pore size of the permeable membrane is less than 1 nanometer) or a nanofiltration membrane (the pore size of the nanofiltration membrane is 1-10 nanometers).

[0022] The middle space of the supporting permeable shell 4 is provided with a bottom plate 42 and a partition plate 43. The bottom plate 42 is horizontally arranged, located at the bottom of the supporting permeable shell 4, and is sealed and fixedly connected to the inner annular inner wall of the supporting permeable shell 4; the partition plate 43 is horizontally arranged, located in the middle of the supporting permeable shell 4, and is sealed and fixedly connected to the inner annular inner wall of the supporting permeable shell 4, so that the middle area of ​​the supporting permeable shell 4 forms a sealing area 44 at the bottom and an opening area 45 at the top. The water inlet pipe 21 is coaxially arranged with the supporting permeable shell 4, and the partition plate 43 is passed through its lower end and is sealed and fixedly connected to the partition plate 43.

[0023] When the device is working, the driving assembly 3 drives the rotating chamber 2 to rotate at high speed, the upper end of the water inlet pipe 21 is connected to the external sewage pipeline, and is sealed and rotatably connected with the sewage pipeline. The sewage pipeline is fed with high-pressure sewage, and the sewage enters the sealing area 44. Under the action of water pressure, the sewage is squeezed on the filter membrane 41 and passes through the filter membrane 41, so that the filtered liquid is located on the other side of the supporting permeation shell 4. At the same time, the high-speed rotation of the rotating chamber 2 causes the high-pressure liquid in the sealing area 44 to generate centrifugal force, which increases the squeezing force on the filter membrane 41, thereby accelerating the efficiency of sewage passing through the filter membrane 41 and further improving the sewage filtration effect. In addition, since the sewage in the rotating chamber 2 is concentrated in the bottom area, the center of gravity in the rotating chamber 2 is located at the bottom of the rotating chamber 2 to ensure the stability of the rotation of the rotating chamber 2.

[0024] A plurality of communication ports 211 are evenly provided around the water inlet pipe 21, so that the liquid part entering the water inlet pipe 21 will be discharged into the opening area 45 through the communication ports 211. As the supporting permeation shell 4 rotates at a high speed, the sewage will gather toward the filter membrane 41 and squeeze the filter membrane 41, and the sewage will pass through the filter membrane 41 under the action of centrifugal force, thereby achieving 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 chamber 2, thereby ensuring the stability of the rotation of the rotating chamber 2.

[0025] In some embodiments, the diameter of the upper port of the supporting permeable shell 4 is larger than the diameter of the lower port, so that the inner annular inner wall of the supporting 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 supporting permeable shell 4 under the action of centrifugal force, thereby increasing the contact area between the sewage and the filter membrane 41, and indirectly improving the filtration efficiency of the sewage. In addition, due to the high-speed rotation of the rotating chamber 2 and the inclined setting of the supporting permeable shell 4, the sewage will be driven to flow obliquely upward during the flow of the sewage, thereby increasing the stroke of the sewage penetrating the filter membrane 41, greatly improving the filtration effect of the sewage.

[0026] In some embodiments, the opening direction of each communication port 211 is toward the direction of the partition plate 43, so that the liquid discharged from the sewage through the communication port 211 will be evenly sprayed like the bottom area of ​​the opening area 45, so that most of the sewage will flow from the bottom of the inner wall supporting the permeation shell 4 to the top and be squeezed and filtered, ensuring sufficient contact between the sewage and the filter membrane 41.

[0027] In some embodiments, a plurality of guide plates 46 are provided on the inner annular inner wall of the supporting permeable shell 4. The guide plates 46 are annular and evenly spaced along the height direction of the supporting permeable shell 4, and the guide plates 46 are all inclined toward the direction of the partition plate 43. When the sewage flows along the inner wall of the supporting permeable shell 4, part of the liquid will be confined in the space between the guide plates 46 and the inner wall of the supporting permeable shell 4. With the increase of centrifugal force, the guide plates 46 indirectly apply a squeezing force, which speeds up the efficiency of the sewage passing through the filter membrane 41. Due to the inclined setting of the guide plates 46, the flow of the liquid is not affected, and thus the filtering efficiency of most of the liquid is not affected.

[0028] Figure 4A schematic diagram of the local structure in the rotating bin 2 in a membrane absorption treatment device for high-ammonia nitrogen wastewater treatment according to an embodiment of the present invention is shown. In order to prevent the sewage in the opening area 45 from not being filtered by the filter membrane 41 and accumulating at the top edge of the opening area 45, thereby affecting the overall center of gravity distribution in the rotating bin 2, a guide channel 5 for accommodating the flow of unfiltered sewage is reserved between the top area of ​​the supporting permeation shell 4 and the upper inner wall of the rotating bin 2. The guide channel 5 is not connected to the outer annular wall supporting the permeation shell 4. A plurality of sewage outlets 51 that are interconnected with the external environment of the rotating bin 2 are provided on the annular inner wall at the end of the guide channel 5, and an annular wastewater tank 6 is provided outside the rotating bin 2. The wastewater tank 6 is fixed to the base 1, and the wastewater tank 6 is connected to the sewage outlet 51. As the rotating bin 2 rotates, the unfiltered sewage will flow into the diversion channel 5 under the action of centrifugal force, and then flow into the wastewater tank 6 from the sewage outlet 51, thereby recycling the sewage. One end of the sewage drain pipe 12 is connected to the wastewater tank 6, and the other end can be connected to the source of sewage and can filter the sewage again. The unfiltered sewage is discharged in time, which reduces the impact on the center of gravity of the rotating bin 2, making the rotation of the rotating bin 2 more stable and ensuring the filtration efficiency of the sewage.

[0029] 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 annular wall of the rotating bin 2, thereby supporting the rotating bin 2 and ensuring the stability of the rotation of the rotating bin 2.

[0030] A plurality of drainage holes 23 are evenly arranged on the inner ring wall of the rotating chamber 2 opposite to the outer ring wall of the supporting permeable shell 4, which ensures that the filtered liquid is smoothly transferred to the outside of the rotating chamber 2. A filter tank 7 coaxially arranged with the rotating chamber 2 is arranged outside the rotating chamber 2, and the filter tank 7 is fixed to the wastewater tank 6 and is also fixedly connected to the base 1. When the rotating chamber 2 rotates to filter, the sewage passing through the filter membrane 41 enters the filter tank 7 through the drainage holes 23. One end of the above-mentioned water filtration drainage pipe 11 is connected to the filter tank 7, so as to facilitate the transfer of the filtered sewage.

[0031] In some embodiments, a plurality of balls are rotatably connected to the inner annular wall of the filter tank 7, and each ball abuts against the outer annular wall of the rotating chamber 2, thereby supporting the rotating chamber 2 and ensuring the stability of the rotation of the rotating chamber 2.

[0032] In the description of this specification, the terms "connection", "installation", "fixation" and the like should 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 ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in 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); The supporting permeable shell (4) is filled with a filter membrane (41); 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 rotary bin (2), and the upper end of the water inlet pipe (21) passes through the outer wall of the rotary bin (2) and is used to be connected to an external sewage pipeline; 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.

2. A membrane absorption treatment device for high ammonia nitrogen wastewater treatment according to claim 1, characterized in that: A plurality of communication openings (211) are provided around the water inlet pipe (21).

3. A membrane absorption treatment device for treating high ammonia nitrogen wastewater according to claim 2, characterized in that: 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).

4. A membrane absorption treatment device for high ammonia nitrogen wastewater treatment according to claim 3, characterized in that: 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).

5. A membrane absorption treatment device for treating high-ammonia nitrogen wastewater according to claim 3 or 4, 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.

6. A membrane absorption treatment device for treating high-ammonia nitrogen wastewater according to claim 5, 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).

7. 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.

8. 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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