High-concentration ammonia-nitrogen wastewater treatment equipment

Abstract

The invention relates to the technical field of wastewater treatment equipment, and discloses high-concentration ammonia-nitrogen wastewater treatment equipment which comprises a plurality of RO membrane units, a mounting frame and a plurality of connecting pipes, the RO membrane unit comprises a cylinder body, an RO membrane, a sealing cover and a drainage pipe, and the sealing cover, the RO membrane and the drainage pipe are sequentially and fixedly mounted in the cylinder body in the axial direction of the cylinder body; a plurality of cylinders are embedded into the outer circumferential surface of the mounting rack at intervals along the circumferential direction of the mounting rack, each cylinder is communicated with a three-way pipe I and a three-way pipe II, the three-way pipe I is communicated with a wastewater inlet of the RO membrane, the three-way pipe II is communicated with a wastewater outlet of the RO membrane, and a valve I is mounted at one opening of the three-way pipe I; a valve III and a valve IV are respectively mounted at two openings of the three-way pipe II; a valve III arranged along the flowing direction of the wastewater is communicated with the three-way pipe I through a connecting pipe; a valve II is mounted on the input pipe; the backwashing of the single RO membrane is realized without stopping the wastewater treatment state, the backwashing time can be effectively shortened, and the efficient treatment of the wastewater is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment equipment, in particular to high-concentration ammonia nitrogen wastewater treatment equipment. Background Art

[0002] RO membrane wastewater treatment equipment is a sewage treatment equipment that uses pressure and osmotic pressure to separate water from wastewater and simultaneously produces high-concentration wastewater.

[0003] During normal operation, multiple RO membranes are connected in series to form a large-scale wastewater treatment facility to ensure wastewater treatment efficiency and effectiveness. When using wastewater treatment facilities formed by RO membranes in series to treat mine wastewater, due to the large output of mine wastewater, the high ammonia nitrogen content in the wastewater, and the presence of dust mixed with water, the surface of the RO membrane closest to the wastewater inlet will quickly accumulate impurities, and the impurities will block the water production channel entrance in a short period of time, resulting in a decrease in the treatment efficiency of the entire wastewater treatment facility. Therefore, the RO membrane needs to be backwashed more frequently. However, since the wastewater treatment efficiency of the RO membrane closest to the water inlet decreases, the wastewater treatment efficiency of the RO membranes at other locations is still in a higher range, the RO membrane that actually needs to be backwashed more frequently should be the RO membrane closest to the water inlet. Moreover, during backwashing, the backwash water is input from the only water production port, resulting in backwashing of all RO membranes. This will greatly increase the backwashing time, increase the non-operating time of the entire wastewater treatment facility, and reduce the wastewater treatment efficiency. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a high-concentration ammonia nitrogen wastewater treatment device, which can effectively solve the problems raised in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a high-concentration ammonia nitrogen wastewater treatment device, comprising a plurality of RO membrane units, a mounting frame and a plurality of connecting pipes;

[0006] The RO membrane unit includes a cylinder, an RO membrane, a cover, and a drain pipe. The cover, RO membrane, and drain pipe are fixedly installed in the cylinder in sequence along the axial direction of the cylinder. One end of the cover seals the water outlet at one end of the RO membrane, and an input hole is opened on the outer circumference. The other end of the cover is fixedly connected to the input pipe, which is connected to the input hole. One end of the drain pipe is connected to the water outlet at the other end of the RO membrane.

[0007] Multiple cylinders are embedded in the outer circumferential surface of the mounting frame at intervals along the circumference of the mounting frame, and each cylinder is connected with a tee pipe 1 and a tee pipe 2 respectively. The tee pipe 1 is connected to the wastewater inlet of the RO membrane, and the tee pipe 2 is connected to the wastewater outlet of the RO membrane. Valve 1 is installed at one opening of the tee pipe 1, and valve 3 and valve 4 are installed at the two openings of the tee pipe 2 respectively; valve 3 and tee pipe 1 arranged along the wastewater flow direction are connected together through a connecting pipe; valve 2 is installed on the input pipe.

[0008] Preferably, bracket one and bracket two are fixedly connected at both ends of the mounting frame, bracket one is embedded with drive ring one, and bracket two is embedded with drive ring two. Drive ring one and drive ring two are both coaxially arranged with the mounting frame, and drive ring one and drive ring two can rotate around the central axis of the mounting frame.

[0009] Preferably, gear 1 is fixedly connected to the valve stem of valve 1, and rack 1 and rack 2 are installed on the outer circumferential surface of drive ring 1 at circumferential intervals, and rack 1 and rack 2 can respectively engage with the two sides of gear 1, so that the rotation of drive ring 1 can drive rack 1 and rack 2 to engage with gear 1 in turn, realize the forward and reverse rotation of gear 1, and then realize the opening and closing of valve 1.

[0010] Preferably, gear 2 is fixedly connected to the valve stem of valve 2, and rack 3 and rack 4 are installed on the inner circumferential surface of drive ring 1 at circumferential intervals. Rack 3 and rack 4 can respectively engage with the two sides of gear 2, so that rack 3 and rack 4 can be driven to engage with gear 2 in turn through the rotation of drive ring 1, thereby realizing the forward and reverse rotation of gear 2, and further realizing the opening and closing of valve 2.

[0011] Preferably, the opening and closing of valve 1 occurs between the rack 4 driving two adjacent valves 2 to close.

[0012] Preferably, gear three is fixedly connected to the valve stem of valve three, and rack five and rack six are fixedly installed on the inner circumferential surface of drive ring two at circumferential intervals, and rack five and rack six can respectively engage with the two sides of gear three, so that rack six and rack five can be driven to engage with gear three in turn through the rotation of drive ring two, thereby realizing the forward and reverse rotation of gear three and the closing and opening of valve three.

[0013] Preferably, gear four is fixedly connected to the valve stem of valve four, and rack seven and rack eight are fixedly installed on the inner circumferential surface of drive ring two at circumferential intervals, and rack seven and rack eight can respectively engage with both sides of gear four, so that rack eight and rack seven can be driven to engage with gear four in turn through the rotation of drive ring two, thereby realizing forward and reverse rotation of gear four and opening and closing of valve four.

[0014] Preferably, the sector angle formed by rack five, rack six and the mounting frame is equal to the sector angle formed by three adjacent valves three and the mounting frame; the sector angle formed by rack seven, rack eight and the mounting frame is equal to the sector angle formed by two adjacent valves three and the mounting frame.

[0015] Preferably, for valves 3 and 4 installed on the same tee pipe 2, valve 4 is opened after valve 3 is closed by rack 6; valve 4 is opened after rack 6 closes one valve 3 and before closing the next valve 3.

[0016] Preferably, when valve 2 is in an open state, the RO membrane unit located beside valve 2 and in the reverse rotation direction is in an empty state, and valve 4 located beside the empty RO membrane unit and in the reverse rotation direction discharges the treated wastewater.

[0017] Compared with the prior art, the present invention provides a high-concentration ammonia nitrogen wastewater treatment equipment with the following beneficial effects:

[0018] 1. By setting up multiple input pipes, each of which can be used to input wastewater that has not been treated by the RO membrane, each RO membrane can be used as the first RO membrane to treat wastewater in the wastewater treatment equipment;

[0019] 2. During the wastewater treatment process, multiple RO membranes are sequentially used as the first RO membranes to treat wastewater in the wastewater treatment equipment. When one RO membrane becomes the first RO membrane to treat wastewater, the RO membranes located next to the RO membrane and in the opposite direction of wastewater treatment are in an idle state. Therefore, when the RO membrane that treats wastewater first needs to be backwashed due to reduced wastewater treatment efficiency, the RO membrane can be independently separated for backwashing. The RO membrane that originally treated wastewater second is converted to the first RO membrane to treat wastewater, and the RO membrane that was originally in an idle state is converted to the last RO membrane to treat wastewater, thereby ensuring treatment efficiency and treatment effect. The RO membrane after backwashing is converted to an idle state, realizing the recycling of RO membranes.

[0020] 3. The backwashing of a single RO membrane is realized without stopping the wastewater treatment, which can effectively shorten the backwashing time and ensure the efficient treatment of wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 A schematic diagram of the overall structure of the present invention from another perspective;

[0023] Figure 3 It is a partial structural schematic diagram of the present invention;

[0024] Figure 4 Schematic diagram of the internal structure of the RO membrane unit;

[0025] Figure 5 Schematic diagram of the coordination of rack 1, rack 2, rack 3, rack 4, gear 1 and gear 2;

[0026] Figure 6 Schematic diagram of the coordination of rack five, rack six, rack seven, rack eight, gear three and gear four;

[0027] Figure 7 Schematic diagram of the cover structure.

[0028] 1. Mounting frame; 2. RO membrane unit; 21. Cylinder; 22. RO membrane; 23. Cover; 231. Input hole; 24. Drain pipe; 3. Connecting pipe; 4. Tee-piece 1; 41. Valve 1; 5. Tee-piece 2; 51. Valve 3; 52. Valve 4; 6. Input pipe; 61. Valve 2; 7. Gear 1; 8. Gear 2; 9. Gear 3; 10. Gear 4; 11. Rack 1; 12. Rack 2; 13. Rack 3; 14. Rack 4; 15. Rack 5; 16. Rack 6; 17. Rack 7; 18. Rack 8; 19. Drive ring 1; 20. Drive ring 2; 191. Bracket 1; 201. Bracket 2. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figures 1 to 7 A high-concentration ammonia nitrogen wastewater treatment device includes multiple RO membrane units 2, a mounting frame 1 and multiple connecting pipes 3.

[0031] The mounting frame 1 is cylindrical in shape with small ends and a large middle, and the two ends with small diameters on the mounting frame 1 are respectively the two small ends of the mounting frame 1. The outer circumferences of the two small ends of the mounting frame 1 are respectively fixedly sleeved with a bracket 191 and a bracket 201, and the entire wastewater treatment equipment is installed in the use position through the bracket 191 and the bracket 201;

[0032] The end with the larger diameter on the mounting frame 1 is the large end, and a plurality of embedding grooves for installing the RO membrane unit 2 are evenly spaced along the circumferential direction on the outer circumferential surface of the large end of the mounting frame 1, and the central axis of each embedding groove is parallel to the central axis of the mounting frame 1; the RO membrane unit 2 is installed on the mounting frame 1 in an embedded manner through the embedding grooves.

[0033] The RO membrane unit 2 includes a cylinder 21 , an RO membrane 22 , a cover 23 and a drain pipe 24 .

[0034] Multiple cylinders 21 are correspondingly embedded in multiple grooves and are detachably fixedly connected to the mounting frame 1 via semicircular clamps and bolts. A cover 23, RO membrane 22, and drain pipe 24 are fixedly installed in sequence within the cylinder 21 along its axial direction. One end of the cover 23 seals the produced water outlet at one end of the RO membrane 22, and an input hole 231 is formed on its outer circumference, connecting the input hole 231 to the wastewater inlet of the RO membrane 22. The other end of the cover 23 is fixedly connected to an input pipe 6, which is connected to the input hole 231 and is used to input wastewater that has not been treated by the RO membrane 22 into the RO membrane 22. One end of the drain pipe 24 is connected to the produced water outlet at the other end of the RO membrane 22, and the other end of the drain pipe 24 is connected to a two-way pump. The two-way pump is used to pump produced water out of the RO membrane 22, increasing the pressure difference between the wastewater inlet and the produced water outlet of the RO membrane 22 and improving water production efficiency. The two-way pump is also used to pump backwash water into the produced water outlet when backwashing the RO membrane 22.

[0035] Each cylinder 21 is connected to a tee pipe 1 4 and a tee pipe 2 5. The tee pipe 1 4 is connected to the wastewater inlet of the RO membrane 22, and the tee pipe 2 5 is connected to the wastewater outlet of the RO membrane 22. A valve 1 41 is installed at one opening of the tee pipe 1 4, and a valve 3 51 and a valve 4 52 are installed at the two openings of the tee pipe 2 5 respectively. The valve 3 51 and the tee pipe 1 4, which are arranged along the direction of wastewater flow, are connected together through a connecting pipe 3. The input pipe 6 is installed with a valve 2 61.

[0036] The RO membrane 22 has a wastewater treatment state and an empty state, that is, the RO membrane unit 2 has a wastewater treatment state and an empty state. When treating wastewater, multiple RO membrane units 2 arranged along the wastewater flow direction are used to treat the wastewater together, and the number of RO membrane units 2 participating in the wastewater treatment is one less than the total number of RO membrane units 2. That is, when treating wastewater, except for one RO membrane unit 2 in the empty state, the remaining RO membrane units 2 are in the wastewater treatment state.

[0037] When the RO membrane unit 2 is in the wastewater treatment state and first treats wastewater, valve 1 41, valve 2 61, valve 3 51 and valve 4 52 installed on the RO membrane unit 2 are in the closed state, open state, open state and closed state respectively.

[0038] When the RO membrane unit 2 is in the wastewater treatment state and is located between the first wastewater treated and the last wastewater treated, valve 1 41, valve 2 61, valve 3 51 and valve 4 52 installed on the RO membrane unit 2 are in the closed state, closed state, open state and closed state respectively.

[0039] When the RO membrane unit 2 is in the wastewater treatment state and finally treats the wastewater, the valve 1 41, valve 2 61, valve 3 51 and valve 4 52 installed on the RO membrane unit 2 are respectively in the closed state, closed state, closed state and open state; the opened valve 4 52 is used to discharge the wastewater after the last treatment.

[0040] When the RO membrane unit 2 is in an empty state, the RO membrane unit 2 will undergo a backwashing process, and during the backwashing process, valve one 41, valve two 61, valve three 51 and valve four 52 installed on the RO membrane unit 2 are in an open state, a closed state, a closed state and a closed state respectively; after the backwashing is completed, valve one 41 is restored to a closed state, and the states of valve two 61, valve three 51 and valve four 52 remain unchanged.

[0041] By providing a plurality of input pipes 6, and each input pipe 6 can be used to input wastewater that has not been treated by the RO membrane 22, each RO membrane 22 can be used as the RO membrane 22 that treats wastewater first in the wastewater treatment equipment. In addition, during the wastewater treatment process, the plurality of RO membranes 22 sequentially serve as the RO membrane 22 that treats wastewater first in the wastewater treatment equipment. When one RO membrane 22 becomes the RO membrane 22 that treats wastewater first, the RO membrane 22 located next to the RO membrane 22 and in the opposite direction of wastewater treatment is in an idle state. When the RO membrane 22 that treats wastewater first needs to be backwashed due to reduced wastewater treatment efficiency, the RO membrane 22 can be independently backwashed, and the RO membrane 22 that originally treated wastewater second will be converted to the RO membrane 22 that treats wastewater first, and the RO membrane 22 that was originally in an idle state will be converted to the RO membrane 22 that treats wastewater last. After backwashing, the RO membrane 22 is converted to an idle state. In this way, backwashing of the single RO membrane 22 is achieved without stopping the wastewater treatment, which can effectively shorten the backwashing time and ensure efficient wastewater treatment.

[0042] Each drainage pipe 24 of each RO membrane unit 2 in the wastewater treatment state is used to discharge produced water.

[0043] Drive ring 19 is embedded in bracket 191, and drive ring 20 is embedded in bracket 201. Drive ring 19 and drive ring 2 are both coaxially arranged with mounting frame 1 and can rotate about the central axis of mounting frame 1. Drive ring 19 and drive ring 2 are each driven to rotate by an external drive unit, such as a drive device consisting of a motor, gears, and ring gears.

[0044] A gear 7 is fixedly connected to the valve stem of valve 141, and a rack 11 and a rack 2 12 are installed on the outer circumferential surface of the drive ring 19 at intervals in the circumferential direction. The rack 11 and the rack 2 12 can respectively engage with the two sides of the gear 17, so that the rotation of the drive ring 19 can drive the rack 11 and the rack 2 12 to engage with the gear 17 in sequence, thereby realizing the forward and reverse rotation of the gear 7, and further realizing the opening and closing of the valve 41.

[0045] Gear 2 8 is fixedly connected to the valve stem of valve 2 61, and rack 3 13 and rack 4 14 are installed on the inner circumferential surface of drive ring 1 19 at intervals in the circumferential direction. Rack 3 13 and rack 4 14 can respectively engage with the two sides of gear 2 8, so that the rotation of drive ring 1 19 can drive rack 3 13 and rack 4 14 to engage with gear 2 8 in turn, thereby realizing the forward and reverse rotation of gear 2 8, and further realizing the opening and closing of valve 2 61.

[0046] The opening and closing of valve 1 41 occurs between the rack 4 14 driving the two adjacent valves 2 61 to close.

[0047] The valve stem of valve three 51 is fixedly connected to gear three 9, and the inner circumferential surface of drive ring two 20 is fixedly installed with rack five 15 and rack six 16 at intervals in the circumferential direction, and rack five 15 and rack six 16 can respectively engage with the two sides of gear three 9, so that the rotation of drive ring two 20 can drive rack six 16 and rack five 15 to engage with gear three 9 in turn, thereby realizing the forward and reverse rotation of gear three 9 and the closing and opening of valve three 51.

[0048] A gear 4 10 is fixedly connected to the valve stem of valve 4 52, and a rack 7 17 and a rack 8 18 are fixedly installed on the inner circumferential surface of drive ring 20 at intervals in the circumferential direction. Rack 7 17 and rack 8 18 can respectively engage with the two sides of gear 4 10, so that the rotation of drive ring 20 can drive rack 8 18 and rack 7 17 to engage with gear 4 10 in turn, thereby realizing the forward and reverse rotation of gear 4 10 and the opening and closing of valve 4 52.

[0049] The sector angle formed by rack five 15, rack six 16 and mounting frame 1 is equal to the sector angle formed by three adjacent valve three 51 and mounting frame 1; the sector angle formed by rack seven 17, rack eight 18 and mounting frame 1 is equal to the sector angle formed by two adjacent valve three 51 and mounting frame 1.

[0050] For valve three 51 and valve four 52 installed on the same three-way pipe two 5, valve four 52 is opened after valve three 51 is closed by rack six 16; valve four 52 is opened after rack six 16 closes one valve three 51 and before closing the next valve three 51.

[0051] When valve 2 61 is in an open state, the RO membrane unit 2 located beside valve 2 61 and in the reverse rotation direction is in an empty state, and valve 4 52 located beside the RO membrane unit 2 in the empty state and in the reverse rotation direction discharges the waste water.

[0052] By rotating the driving ring 19, the opening and closing of the control valve 2 61 are controlled to switch the RO membrane unit 2 to the RO membrane unit 2 that treats the wastewater first, or to leave the RO membrane unit 2 that needs backwashing vacant to facilitate the flushing of the RO membrane unit 2, avoid backwashing all the RO membrane units 2 involved in the wastewater treatment at the same time, and ensure the continuity of the wastewater treatment and the efficiency of the wastewater treatment.

[0053] At the same time, the valve 41 installed on the RO membrane unit 2 in the empty state is controlled to open and close by the rotation of the driving ring 19, so as to facilitate the backwashing of the RO membrane unit 2 in the empty state.

[0054] By rotating the driving ring 20, the opening of the control valve 3 51 and the valve 4 52 is controlled, so that when treating wastewater, there will always be an RO membrane unit 2 in an empty state. When the RO membrane unit 2 that treats wastewater first needs to be backwashed, the RO membrane unit 2 in the empty state can be quickly replaced and enter the wastewater treatment state, thereby ensuring the wastewater treatment efficiency and treatment effect.

[0055] At the same time, by driving the second ring 20 to rotate, only the valve 4 52 located on the RO membrane unit 2 that treats the wastewater last is used to discharge the treated wastewater, thereby preventing untreated wastewater from flowing out.

[0056] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-concentration ammonia nitrogen wastewater treatment device, comprising a plurality of RO membrane units (2), characterized in that: It also includes a mounting frame (1) and a plurality of connecting pipes (3); The RO membrane unit (2) comprises a cylinder (21), an RO membrane (22), a sealing cover (23) and a drainage pipe (24); the sealing cover (23), the RO membrane (22) and the drainage pipe (24) are fixedly installed in the cylinder (21) in sequence along the axial direction of the cylinder (21); one end of the sealing cover (23) seals the water production outlet at one end of the RO membrane (22), and an input hole (231) is provided on the outer circumferential surface; the other end of the sealing cover (23) is fixedly connected to the input pipe (6), the input pipe (6) is connected to the input hole (231), and one end of the drainage pipe (24) is connected to the water production outlet at the other end of the RO membrane (22); A plurality of cylinders (21) are embedded in the outer circumferential surface of the mounting frame (1) at intervals along the circumference of the mounting frame (1), and each cylinder (21) is respectively connected with a tee pipe 1 (4) and a tee pipe 2 (5), the tee pipe 1 (4) is connected with the wastewater inlet of the RO membrane (22), the tee pipe 2 (5) is connected with the wastewater outlet of the RO membrane (22), a valve 1 (41) is installed at one opening of the tee pipe 1 (4), and a valve 3 (51) and a valve 4 (52) are respectively installed at two openings of the tee pipe 2 (5); the valve 3 (51) and the tee pipe 1 (4) arranged along the flow direction of the wastewater are connected together through a connecting pipe (3); and the input pipe (6) is installed with a valve 2 (61).

2. A high-concentration ammonia nitrogen wastewater treatment equipment according to claim 1, characterized in that: The two ends of the mounting frame (1) are respectively fixedly connected with a bracket 1 (191) and a bracket 2 (201); a driving ring 1 (19) is embedded in the bracket 1 (191); a driving ring 2 (20) is embedded in the bracket 2 (201); the driving ring 1 (19) and the driving ring 2 (20) are both coaxially arranged with the mounting frame (1), and the driving ring 1 (19) and the driving ring 2 (20) are both capable of rotating around the central axis of the mounting frame (1).

3. A high-concentration ammonia nitrogen wastewater treatment equipment according to claim 2, characterized in that: The valve stem of the valve 1 (41) is fixedly connected to the gear 1 (7), and the outer circumferential surface of the drive ring 1 (19) is provided with a rack 1 (11) and a rack 2 (12) at intervals along the circumferential direction, and the rack 1 (11) and the rack 2 (12) can respectively engage with the two sides of the gear 1 (7), so that the rotation of the drive ring 1 (19) can drive the rack 1 (11) and the rack 2 (12) to engage with the gear 1 (7) in turn, thereby realizing the forward and reverse rotation of the gear 1 (7), and further realizing the opening and closing of the valve 1 (41).

4. A high-concentration ammonia nitrogen wastewater treatment equipment according to claim 3, characterized in that: The valve stem of the valve 2 (61) is fixedly connected with the gear 2 (8), and the inner circumferential surface of the driving ring 1 (19) is provided with a rack 3 (13) and a rack 4 (14) at intervals along the circumferential direction. The rack 3 (13) and the rack 4 (14) can respectively engage with the two sides of the gear 2 (8), so that the rotation of the driving ring 1 (19) can drive the rack 3 (13) and the rack 4 (14) to engage with the gear 2 (8) in turn, thereby realizing the forward and reverse rotation of the gear 2 (8), and further realizing the opening and closing of the valve 2 (61).

5. A high-concentration ammonia nitrogen wastewater treatment equipment according to claim 4, characterized in that: The opening and closing of the valve 1 (41) occurs between the rack 4 (14) driving the two adjacent valves 2 (61) to close.

6. The high-concentration ammonia nitrogen wastewater treatment equipment according to claim 1, characterized in that: The valve stem of the valve three (51) is fixedly connected with the gear three (9), and the inner circumferential surface of the driving ring two (20) is fixedly installed with the rack five (15) and the rack six (16) at intervals along the circumferential direction, and the rack five (15) and the rack six (16) can respectively engage with the two sides of the gear three (9), so that the rack six (16) and the rack five (15) can be driven by the rotation of the driving ring two (20) to engage with the gear three (9) in turn, thereby realizing the forward and reverse rotation of the gear three (9) and realizing the closing and opening of the valve three (51).

7. The high-concentration ammonia nitrogen wastewater treatment equipment according to claim 6, characterized in that: The valve stem of the valve four (52) is fixedly connected with a gear four (10), and the inner circumferential surface of the drive ring two (20) is fixedly installed with a rack seven (17) and a rack eight (18) at intervals in the circumferential direction, and the rack seven (17) and the rack eight (18) can respectively engage with the two sides of the gear four (10), so that the rotation of the drive ring two (20) can drive the rack eight (18) and the rack seven (17) to engage with the gear four (10) in turn, thereby realizing the forward and reverse rotation of the gear four (10) and realizing the opening and closing of the valve four (52).

8. The high-concentration ammonia nitrogen wastewater treatment equipment according to claim 7, characterized in that: The sector angle formed by the rack five (15), the rack six (16) and the mounting frame (1) is equal to the sector angle formed by the three adjacent valve threes (51) and the mounting frame (1); the sector angle formed by the rack seven (17), the rack eight (18) and the mounting frame (1) is equal to the sector angle formed by the two adjacent valve threes (51) and the mounting frame (1).

9. The high-concentration ammonia nitrogen wastewater treatment equipment according to claim 8, characterized in that: For valve three (51) and valve four (52) installed on the same three-way pipe two (5), after valve three (51) is closed by rack six (16), valve four (52) is opened; after rack six (16) closes one valve three (51), before closing the next valve three (51), valve four (52) is opened.

10. The high-concentration ammonia nitrogen wastewater treatment equipment according to claim 9, characterized in that: When the second valve (61) is in an open state, the RO membrane unit (2) located beside the second valve (61) and in the reverse rotation direction is in an empty state, and the waste water is discharged from the fourth valve (52) located beside the RO membrane unit (2) in the empty state and in the reverse rotation direction.

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