CN113860418B

CN113860418B - Disconnect-type photocatalysis sewage treatment system

Info

Publication number: CN113860418B
Application number: CN202111117793.1A
Authority: CN
Inventors: 刘超; 黄昊; 牛永生; 王春艳; 苏文辉
Original assignee: Anyang Institute of Technology
Current assignee: Anyang Chengda Environmental Protection Consulting Co ltd; Anyang Institute of Technology
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2023-04-07
Anticipated expiration: 2041-09-24
Also published as: CN113860418A

Abstract

The invention discloses a separated photocatalytic sewage treatment system, and relates to the technical field of sewage treatment. The invention comprises a reaction device, a magnetic drive stirrer, a magnetic drive and a separation mechanism; the reaction device consists of a cooling assembly, a reaction assembly and a rotary sealing mechanism, wherein the reaction assembly is sleeved in the cooling assembly, and the rotary sealing mechanism is in sliding fit with the reaction assembly; the magnetic driver is arranged at the central position of the bottom of the reaction component, the magnetic driving stirrer is matched with the bottom in the reaction component in a rotating way, and the magnetic driver and the magnetic driving stirrer are attracted magnetically; the separation mechanism is in sliding fit with the inner surface of the reaction assembly. According to the invention, through the design of the separation and collection component, the drainage component, the reaction component and the rotary sealing mechanism, the pressure applied to the reaction solution by the separation and collection component is utilized, so that the solution containing fine catalytic particles flows back to the material collection net bucket through the drainage port, the backflow channel and the water return port, and the high-efficiency recovery of the catalytic material in the reaction solution is realized.

Description

Disconnect-type photocatalysis sewage treatment system

Technical Field

The invention belongs to the technical field of sewage treatment, and particularly relates to a separated photocatalytic sewage treatment system.

Background

The photocatalysis technology is an environmental pollution treatment technology with application prospect, and the principle is that a semiconductor material absorbs illumination energy to generate electronic transition under the illumination condition. The electrons jump from the valence band to the conduction band, so that holes appear at the original positions to form pairs of photogenerated electrons and photogenerated holes. Because the electrons and the holes have strong reducing capability and oxidizing capability respectively, the method can degrade and mineralize environmental pollutants. The photocatalytic technology has the advantages of easily controlled reaction conditions, strong oxidation capability, full utilization of solar energy, no secondary pollution and the like, and has become one of the hotspots of research in the field of environmental catalysis.

However, in the process of implementing the specific embodiment of the present invention, the inventors of the present application found that the following drawbacks still exist in the photocatalytic reaction system in the prior art: (1) The existing photocatalytic reaction system has single function, and is inconvenient to collect semiconductor catalysts after the experiment is finished, so that the application range of the photocatalytic reaction system is greatly reduced; (2) The existing photocatalytic reaction system is generally used for directly putting a magnetic rotor into a reactor to carry out magnetic driving stirring in the using process, so that the magnetic catalytic material is easily adsorbed on the surface of the magnetic rotor, the dispersion efficiency of the magnetic catalytic material is greatly reduced, the degradation rate of organic pollutants is low, and the magnetic catalytic material adsorbed on the surface of the magnetic rotor is not easily separated and recovered. Therefore, a separated photocatalytic sewage treatment system is designed to solve the technical problems.

Disclosure of Invention

The invention aims to provide a separated photocatalytic sewage treatment system, which solves the problems that the existing photocatalytic reaction system has single function, is inconvenient to realize the collection of semiconductor catalysts after an experiment is finished and causes the application range of the photocatalytic reaction system to be greatly reduced through the design of a magnetic driving stirrer, a magnetic driver, a separation and collection component, a drainage component, a cooling component, a reaction component and a rotary sealing mechanism, and the existing photocatalytic reaction system is generally used for directly placing a magnetic rotor into a reactor to carry out magnetic driving stirring, so that magnetic catalytic materials are easily adsorbed on the surface of the magnetic rotor, further the dispersion efficiency of the magnetic catalytic materials is greatly reduced, the degradation rate of organic pollutants is low, and the magnetic catalytic materials adsorbed on the surface of the magnetic rotor are not easily separated and recovered.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a separated photocatalytic sewage treatment system, which comprises a reaction device, a magnetic drive stirrer, a magnetic drive and a separation mechanism, wherein the reaction device is arranged on the reaction device; the reaction device consists of a cooling assembly, a reaction assembly and a rotary sealing mechanism, and the cooling assembly, the reaction assembly and the rotary sealing mechanism are coaxial; the reaction assembly is sleeved in the cooling assembly, and the rotary sealing mechanism is in sliding fit with the reaction assembly; the magnetic driver is arranged at the center of the bottom of the reaction component, the magnetic driving stirrer is matched with the bottom in the reaction component in a rotating way, and the magnetic driver and the magnetic driving stirrer are attracted magnetically; the separation mechanism and the reaction assembly are coaxial, and the separation mechanism is in sliding fit with the inner surface of the reaction assembly.

Furthermore, the cooling assembly comprises a hollow cooling water tank, a water outlet joint is arranged at the position, close to the top, of the outside of the hollow cooling water tank, and a water inlet joint is arranged at the position, close to the bottom, of the outside of the hollow cooling water tank.

Further, the reaction assembly comprises a base, a reaction tank in clearance fit with the inner wall of the hollow cooling water tank is fixed on the upper surface of the base, a plurality of backflow channels are formed in the top of the reaction tank along the annular direction, and limiting slideways are formed in the inner wall of the backflow channels.

A plurality of water outlets communicated with the limiting slide ways are formed in the inner surface of the reaction tank in the circumferential direction and close to the bottom of the reaction tank, a plurality of water return ports communicated with the limiting slide ways are formed in the inner surface of the reaction tank in the circumferential direction and close to the top of the reaction tank, and the water outlets are matched with the water return ports in position; the reaction tank is characterized in that a rotating groove is formed in the center of the bottom of the reaction tank, and an installation cavity coaxial with the rotating groove is formed in the lower surface of the base.

Further, the magnetic driver is arranged inside the installation chamber; the magnetic driver comprises a magnetic rotor, a positioning ring is fixed on the upper surface of the magnetic rotor, and a driving magnetic ring is mounted on the inner surface of the positioning ring; the magnetic driving stirrer comprises a connecting column, a magnetic column which is in rotating fit with the rotating groove is fixed at the bottom of the connecting column, and the magnetic column and the driving magnetic ring are magnetically attracted; and a plurality of curved surface stirring rods are arranged on the peripheral side surface of the connecting column.

Furthermore, the rotary sealing mechanism comprises a mounting ring, and the bottom of the mounting ring is in clamping fit with the top of the reaction tank; the upper surface of the mounting ring is uniformly and rotatably connected with a plurality of supporting rods along the circumferential direction, and a fluted disc is fixed at the top ends of the supporting rods; the outer surface of the mounting ring is rotatably connected with an unsealing ring which is coaxial with the mounting ring, an inner toothed ring which is coaxial with the unsealing ring is fixed on the inner surface of the unsealing ring, and the inner toothed ring is meshed with the toothed disc.

Further, branch week side has porous connection pad and sealed dish by supreme screw-thread fit respectively down, sealed dish and return channel sliding fit.

A first sealing element is fixed on the peripheral side face of the porous connecting disc, a second sealing element is fixed on the peripheral side face of the sealing disc, and the first sealing element and the second sealing element are in sliding fit with the limiting slide way; the first sealing element is matched with the position of the water outlet, and the second sealing element is matched with the position of the water return port.

Furthermore, the separation mechanism is composed of a separation and collection assembly and a drainage assembly, the separation and collection assembly and the drainage assembly are coaxial and are in threaded fit; the separation and collection assembly comprises a water pressing disc, and the water pressing disc is in sliding fit with the inner surface of the reaction tank; a threaded push rod is fixed at the center of the upper surface of the water pressing disc, and a material collecting net bucket is fixed on the peripheral side surface of the threaded push rod, close to the position of the water pressing disc.

Two water leakage ports are symmetrically formed in the upper surface of the water pressing disc, two through holes are symmetrically formed in the inner surface of the material collecting net bucket, and the through holes and the water leakage ports are coaxial.

Furthermore, the drainage assembly comprises a cylindrical fixed table, slide bars in sliding fit with the through holes are symmetrically fixed at the bottom of the cylindrical fixed table, and a sealing plug in fit with the drainage port is fixed at the lower ends of the slide bars; the top of the cylindrical fixed table is rotatably connected with a threaded knob, and the threaded knob is in threaded fit with the threaded push rod.

The invention has the following beneficial effects:

1. according to the invention, through the design of the separation and collection component, the flow discharge component, the backflow channel, the limiting slide way, the water discharge port, the water return port and the rotary sealing mechanism, after the reaction is finished, the pressure applied to the reaction solution by the separation and collection component is utilized, so that the solution containing fine catalytic particles flows back to the material collection net bucket through the water discharge port, the backflow channel and the water return port, then the flow discharge component is rotated to make the sealing plug separated from the water leakage port, and the separation and collection component is moved out to collect the fine catalytic particles in the material collection net bucket, thereby realizing the efficient recovery of the catalytic materials in the reaction solution.

2. According to the invention, through the design of the installation cavity, the rotation groove, the magnetic drive stirrer and the magnetic driver, the magnetic drive device is used for driving the magnetic driver to rotate, and the rotation of the magnetic drive stirrer is realized through the magnetic connection effect of the magnetic driver and the magnetic drive stirrer, so that the stirring of a reaction solution is realized, the separation of a magnetic rotor and the reaction solution is realized, the dispersion efficiency of a magnetic catalytic material is greatly increased, the improvement of the degradation rate of organic pollutants is facilitated, and the recovery of the magnetic catalytic material is facilitated.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a stirring reaction structure of a separated photocatalytic sewage treatment system.

Fig. 2 is a top view of the structure of fig. 1.

FIG. 3 is a schematic diagram of a magnetic drive.

FIG. 4 is a schematic view of the structure of a magnetically driven agitator.

FIG. 5 is a schematic diagram of the material recycling structure of the separated photocatalytic sewage treatment system.

Fig. 6 is a schematic structural view of the separating mechanism.

Fig. 7 is a schematic structural view of the separation and collection assembly.

Fig. 8 is a structural diagram of the bottom view of fig. 7.

Fig. 9 is a schematic structural view of the drain assembly.

FIG. 10 is an exploded view of the reaction apparatus.

Fig. 11 is a schematic structural view of a cooling module.

FIG. 12 is a schematic view of the structure of the reaction module.

Fig. 13 is a top view of the structure of fig. 12.

Fig. 14 is a structural diagram of the bottom view angle of fig. 12.

Fig. 15 is a cross-sectional view of a longitudinal structure of fig. 12.

Fig. 16 is a schematic structural view of the rotary seal mechanism.

In the drawings, the reference numbers indicate the following list of parts:

1-reaction device, 2-magnetic driving stirrer, 201-connecting column, 202-magnetic column, 203-curved stirring rod, 3-magnetic driver, 301-magnetic rotor, 302-positioning ring, 303-driving rotating magnetic ring, 4-separating mechanism, 5-cooling component, 501-hollow cooling water tank, 502-water outlet joint, 503-water inlet joint, 6-reaction component, 601-base, 602-reaction tank, 603-return channel, 604-limit slide way, 605-water outlet, 606-water return port, 607-rotating groove, 608-mounting chamber, 7-rotary sealing mechanism, 701-mounting ring, 702-supporting rod, 703-fluted disc, 704-unsealing ring, 705-inner toothed ring, 706-porous connecting disc, 707-sealing disc, 708-first sealing element, 709-second sealing element, 8-separating and collecting component, 801-water pressing disc, 802-threaded push rod, 802-material collecting net bucket, 804-leakage hole, 805-water outlet, 9-drainage component, 9-cylindrical fixing table, 902-threaded fixing table, 903-sealing rod, 904-through hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-16, the present invention is a separated photocatalytic sewage treatment system, which comprises a reaction device 1, a magnetically driven stirrer 2, a magnetic driver 3 and a separating mechanism 4; in the degradation process of organic pollutants, an external magnetic driving device is used for driving a magnetic driver 3 to rotate, so that a magnetic driving stirrer 2 synchronously rotates, the stirring of reaction solution is realized, and after the reaction is finished, a separation mechanism 4 can be used for refluxing and collecting solid catalysts in the reaction solution;

the reaction device 1 consists of a cooling component 5, a reaction component 6 and a rotary sealing mechanism 7, and the cooling component 5, the reaction component 6 and the rotary sealing mechanism 7 are coaxial;

the reaction assembly 6 is sleeved in the cooling assembly 5, the heat dissipation of the reaction assembly 6 is realized by utilizing the cooling effect of the cooling assembly 5, and the rotary sealing mechanism 7 is in sliding fit with the reaction assembly 6; the magnetic driver 3 is arranged at the central position of the bottom of the reaction component 6, the magnetic driving stirrer 2 is matched with the bottom in the reaction component 6 in a rotating way, and the magnetic driver 3 and the magnetic driving stirrer 2 are magnetically attracted, so that the magnetic driver 3 and the magnetic driving stirrer 2 can synchronously rotate;

the separating mechanism 4 and the reaction assembly 6 are coaxial, the separating mechanism 4 is in sliding fit with the inner surface of the reaction assembly 6, and after the reaction is finished, downward pressure can be applied to the reaction solution by the separating mechanism 4, so that the reaction solution containing the fine solid catalyst flows back from bottom to top and flows back to the top of the separating mechanism 4 to collect the catalytic material.

In this embodiment, cooling module 5 includes cavity cooling water tank 501, cavity cooling water tank 501 outside is close to the top position and is provided with water connectors 502, cavity cooling water tank 501 outside is close to the bottom position and is provided with water connectors 503, dock the outlet pipe in water connectors 502 department, dock the inlet tube in water connectors 503 department, the cooling water flows into cavity cooling water tank 501's cooling cavity through water connectors 503, flow through water connectors 502 at last, utilize the flowing cooling water constantly to take away the heat that the reaction process light caused in the reaction module 6, avoid the influence of the temperature that constantly rises to the reaction.

In this embodiment, the reaction assembly 6 includes a base 601, a reaction tank 602 in clearance fit with the inner wall of the hollow cooling water tank 501 is fixed on the upper surface of the base 601, the cooling water flowing in the hollow cooling water tank 501 continuously takes away the excessive heat on the reaction tank 602, the top of the reaction tank 602 is circumferentially provided with a plurality of backflow channels 603, and the inner wall of the backflow channel 603 is provided with a limiting slide 604;

a plurality of water outlets 605 communicated with the limiting slide ways 604 are annularly formed in the position, close to the bottom, of the inner surface of the reaction tank 602, a plurality of water return ports 606 communicated with the limiting slide ways 604 are annularly formed in the position, close to the top, of the inner surface of the reaction tank 602, and the water outlets 605 are matched with the water return ports 606; the reaction solution in the reaction tank 602 is pressed into the return channel 603 through the drain 605 under the action of the external pressure, and then flows back into the reaction tank 602 through the water return port 606 at the top of the return channel 603;

the reaction tank 602 has a rotating groove 607 at the center of the bottom, and the lower surface of the base 601 has a mounting chamber 608 coaxial with the rotating groove 607.

In this embodiment, the magnetic driver 3 is disposed inside the mounting chamber 608; the magnetic driver 3 comprises a magnetic rotor 301, a positioning ring 302 is fixed on the upper surface of the magnetic rotor 301, and a rotation driving magnetic ring 303 is installed on the inner surface of the positioning ring 302; when the reaction assembly 6 is placed on an external magnetic driving device, the magnetic driver 3 is installed in the installation chamber 608, and the magnetic driving device drives the magnetic driver 3 to rotate and simultaneously enables the magnetic driving stirrer 2 to synchronously rotate;

the magnetic driving stirrer 2 comprises a connecting column 201, a magnetic column 202 which is in rotating fit with the rotating groove 607 is fixed at the bottom of the connecting column 201, and the magnetic column 202 and the driving magnetic ring 303 are magnetically attracted;

the circumferential side surface of the connecting column 201 is provided with a plurality of curved surface stirring rods 203, and the resistance of the reaction solution in the reaction process can be reduced through the curved surface arrangement.

In this embodiment, the rotary sealing mechanism 7 includes a mounting ring 701, and the bottom of the mounting ring 701 is in clamping fit with the top of the reaction tank 602; the upper surface of the mounting ring 701 is uniformly and rotatably connected with a plurality of supporting rods 702 along the circumferential direction, and a fluted disc 703 is fixed at the top ends of the supporting rods 702; the outer surface of the mounting ring 701 is rotatably connected with an unsealing ring 704 which is coaxial with the mounting ring, an inner toothed ring 705 which is coaxial with the unsealing ring is fixed on the inner surface of the unsealing ring 704, and the inner toothed ring 705 is meshed with the fluted disc 703;

the porous connecting disc 706 and the sealing disc 707 are respectively in threaded fit with the peripheral side surface of the support rod 702 from bottom to top, and the sealing disc 707 is in sliding fit with the backflow channel 603, so that the reaction solution in the backflow channel 603 can be prevented from flowing out of the reaction tank 602, and further the loss of the solid catalytic material can be avoided;

a first sealing element 708 is fixed on the peripheral side surface of the porous connecting disc 706, a second sealing element 709 is fixed on the peripheral side surface of the sealing disc 707, and the first sealing element 708 and the second sealing element 709 are in sliding fit with the limiting slideway 604; the first sealing element 708 is matched with the water outlet 605 in position, and the second sealing element 709 is matched with the water return port 606 in position; after the reaction is finished, the unsealing ring 704 is rotated, the rotation of the support rod 702 is realized by utilizing the meshing action of the rotating inner toothed ring 705 and the toothed disc 703, the first sealing element 708 moves upwards by utilizing the thread matching action of the support rod 702, the porous connecting disc 706 and the sealing disc 707, and the matching action of the porous connecting disc 706, the sealing disc 707 and the limiting slide way 604, the water outlet 605 is opened, meanwhile, the second sealing element 709 synchronously moves upwards, the water return port 606 is opened, and the water outlet 605, the return channel 603 and the water return port 606 form a smooth return path.

In this embodiment, the separation mechanism 4 is composed of a separation and collection assembly 8 and a discharge assembly 9, the separation and collection assembly 8 and the discharge assembly 9 have the same axis and are in threaded fit;

the separation and collection assembly 8 comprises a water pressing disc 801, and the water pressing disc 801 is in sliding fit with the inner surface of the reaction tank 602; a threaded push rod 802 is fixed at the center of the upper surface of the water pressing disc 801, and a material collecting net bucket 803 is fixed at the peripheral side surface of the threaded push rod 802 close to the water pressing disc 801; after the reaction is finished, after the water return port 606 and the water discharge port 605 are opened by using the rotary sealing mechanism 7, the threaded push rod 802 is pushed downwards, the reaction solution is pressed into the return channel 603 from the water discharge port 605 by using the water pressing disc 801, flows out through the water return port 606 and falls into the material collecting net bucket 803, and when the water pressing disc 801 is pressed into the bottom of the reaction tank 602, all the reaction solution flows to the upper part of the water pressing disc 801;

the upper surface of the water pressing disc 801 is symmetrically provided with two water leaking ports 804, the inner surface of the material collecting net bucket 803 is symmetrically provided with two through holes 805, and the through holes 805 and the water leaking ports 804 have the same axle center; the drainage assembly 9 comprises a cylindrical fixed table 901, a sliding rod 902 in sliding fit with a through hole 805 is symmetrically fixed at the bottom of the cylindrical fixed table 901, and a sealing plug 903 in fit with a water leakage port 804 is fixed at the lower end of the sliding rod 902;

the top of the cylindrical fixed table 901 is rotationally connected with a threaded knob 904, and the threaded knob 904 is in threaded fit with the threaded push rod 802; when all reaction solutions flow to the top of the water pressing disc 801, the thread knob 904 is rotated, so that the sliding rod 902 moves upwards, the sealing plug 903 is driven to be separated from the water leakage port 804, the thread push rod 802 is pulled upwards at the moment, the material collecting net bucket 803 can be completely moved out of the reaction tank 602, fine solid catalytic materials are intercepted on the material collecting net bucket 803, the fine solid catalytic materials are completely collected, and the collecting efficiency and the recovery effect of the catalytic materials are greatly improved.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a disconnect-type photocatalysis sewage treatment system which characterized in that: comprises a reaction device (1), a magnetic drive stirrer (2), a magnetic driver (3) and a separating mechanism (4);

the reaction device (1) consists of a cooling assembly (5), a reaction assembly (6) and a rotary sealing mechanism (7), and the cooling assembly (5), the reaction assembly (6) and the rotary sealing mechanism (7) are coaxial;

the reaction assembly (6) is sleeved inside the cooling assembly (5), and the rotary sealing mechanism (7) is in sliding fit with the reaction assembly (6); the magnetic driver (3) is arranged at the center of the bottom of the reaction component (6), the magnetic driving stirrer (2) is in rotating fit with the bottom in the reaction component (6), and the magnetic driver (3) and the magnetic driving stirrer (2) are magnetically attracted;

the separation mechanism (4) and the reaction assembly (6) are coaxial, and the separation mechanism (4) is in sliding fit with the inner surface of the reaction assembly (6);

the cooling assembly (5) comprises a hollow cooling water tank (501); the reaction assembly (6) comprises a base (601), a reaction tank (602) in clearance fit with the inner wall of the hollow cooling water tank (501) is fixed on the upper surface of the base (601), a plurality of backflow channels (603) are circumferentially arranged at the top of the reaction tank (602), and a limiting slide way (604) is arranged on the inner wall of each backflow channel (603);

a plurality of water outlets (605) communicated with the limiting slide ways (604) are formed in the inner surface of the reaction tank (602) close to the bottom in the circumferential direction, a plurality of water return ports (606) communicated with the limiting slide ways (604) are formed in the inner surface of the reaction tank (602) close to the top in the circumferential direction, and the water outlets (605) are matched with the water return ports (606);

a rotating groove (607) is formed in the center of the bottom in the reaction tank (602), and an installation cavity (608) coaxial with the rotating groove (607) is formed in the lower surface of the base (601);

the rotary sealing mechanism (7) comprises a mounting ring (701), and the bottom of the mounting ring (701) is in clamping fit with the top of the reaction tank (602); a plurality of supporting rods (702) are uniformly and rotatably connected to the upper surface of the mounting ring (701) along the circumferential direction, and a fluted disc (703) is fixed at the top ends of the supporting rods (702);

the outer surface of the mounting ring (701) is rotatably connected with an unsealing ring (704) coaxial with the mounting ring, an inner gear ring (705) coaxial with the unsealing ring (704) is fixed on the inner surface of the unsealing ring (704), and the inner gear ring (705) is meshed with the fluted disc (703);

the peripheral side surface of the support rod (702) is respectively in threaded fit with a porous connecting disc (706) and a sealing disc (707) from bottom to top, and the sealing disc (707) is in sliding fit with the backflow channel (603);

a first sealing element (708) is fixed on the peripheral side face of the porous connecting disc (706), a second sealing element (709) is fixed on the peripheral side face of the sealing disc (707), and the first sealing element (708) and the second sealing element (709) are in sliding fit with the limiting slideway (604);

the first sealing element (708) is matched with the position of the water outlet (605), and the second sealing element (709) is matched with the position of the water return port (606);

the separation mechanism (4) is composed of a separation and collection component (8) and a drainage component (9), the separation and collection component (8) and the drainage component (9) are coaxial and are in threaded fit;

the separation and collection assembly (8) comprises a water pressing disc (801), and the water pressing disc (801) is in sliding fit with the inner surface of the reaction tank (602); a threaded push rod (802) is fixed at the center of the upper surface of the water pressing disc (801), and a material collecting net bucket (803) is fixed at the position, close to the water pressing disc (801), of the peripheral side surface of the threaded push rod (802);

the upper surface of the water pressing disc (801) is symmetrically provided with two water leaking ports (804), the inner surface of the material collecting net bucket (803) is symmetrically provided with two through holes (805), and the through holes (805) and the water leaking ports (804) are coaxial;

the drainage assembly (9) comprises a cylindrical fixed table (901), sliding rods (902) which are in sliding fit with the through holes (805) are symmetrically fixed at the bottom of the cylindrical fixed table (901), and a sealing plug (903) which is in fit with the water leakage port (804) is fixed at the lower end of each sliding rod (902);

the top of the cylindrical fixing table (901) is rotationally connected with a threaded knob (904), and the threaded knob (904) is in threaded fit with the threaded push rod (802).

2. The separated photocatalytic sewage treatment system as set forth in claim 1, wherein a water outlet joint (502) is arranged outside the hollow cooling water tank (501) near the top, and a water inlet joint (503) is arranged outside the hollow cooling water tank (501) near the bottom.

3. The separated photocatalytic sewage treatment system according to claim 1, wherein the magnetic driver (3) is disposed inside the installation chamber (608);

the magnetic driver (3) comprises a magnetic rotor (301), a positioning ring (302) is fixed on the upper surface of the magnetic rotor (301), and a rotating magnetic ring (303) is installed on the inner surface of the positioning ring (302);

the magnetic driving stirrer (2) comprises a connecting column (201), a magnetic column (202) which is in rotating fit with the rotating groove (607) is fixed at the bottom of the connecting column (201), and the magnetic column (202) is magnetically attracted with the driving magnetic ring (303);

the circumferential side surface of the connecting column (201) is provided with a plurality of curved stirring rods (203).