CN111875035A

CN111875035A - Photocatalytic sewage treatment equipment with metal impurity removal effect and capable of improving ultraviolet transmittance

Info

Publication number: CN111875035A
Application number: CN202010788533.6A
Authority: CN
Inventors: 辛紫娟; 杨晨旭
Original assignee: Ma'anshan Zhiqing Industrial Design Co ltd
Current assignee: Ma'anshan Zhiqing Industrial Design Co ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2020-11-03

Abstract

The invention discloses a photocatalytic sewage treatment device capable of improving ultraviolet transmittance and having a metal impurity removal effect, which comprises a sewage treatment box, wherein the upper end of the sewage treatment box is movably connected with an upper cover, a rotating shaft is rotatably connected in the upper cover, a coupler and a first motor are sequentially and fixedly connected to the upper end of the rotating shaft, water inlets which are bilaterally symmetrically arranged are fixedly connected to the upper end of the upper cover, symmetrically arranged supporting legs are fixedly connected to the lower end of the sewage treatment box, ultraviolet lamps which are equidistantly distributed are fixedly connected to the lower end of the upper cover, and L-shaped enclosing plates which are bilaterally symmetrically arranged are fixedly connected to the inner side of the sewage treatment box. This improve photocatalysis formula sewage treatment device that has metal edulcoration effect of ultraviolet ray transmittance, with sewage decolorant homodisperse to the sewage treatment incasement, improve the decoloration effect to sewage, improve the transmittance of purple light lamp, ultrasonic treatment also can degrade the macromolecule, adsorbs the metal impurity in the sewage, avoids causing the exit blockage.

Description

Photocatalytic sewage treatment equipment with metal impurity removal effect and capable of improving ultraviolet transmittance

Technical Field

The invention relates to the technical field of sewage treatment equipment, in particular to photocatalytic sewage treatment equipment with a metal impurity removal effect, which is used for improving the transmittance of ultraviolet rays.

Background

The sewage is the sewage from life and production, which is polluted to a certain extent, and the water is deteriorated and can not keep the original use function because new substances are mixed in the water or because the external conditions are changed.

Failing to reach emission standard's sewage can pollute the water, endanger human self health and life easily, in order to make sewage discharge emission standard, need handle sewage through sewage treatment device, in order to improve the effect of handling, cooperation photocatalysis technique can improve sewage treatment efficiency, but current sewage treatment device exists that ultraviolet ray transmittance is lower, be unfavorable for the seeing through of light, can influence catalytic effect, and the difficult homodisperse of catalyst is in sewage treatment incasement, and the inconvenient shortcoming of cleaing away of metallic impurity in the sewage.

Disclosure of Invention

The invention aims to provide photocatalytic sewage treatment equipment with a metal impurity removal effect, which improves the transmittance of ultraviolet rays and aims to solve the problems that the transmittance of ultraviolet rays is low and metal impurities in sewage are inconvenient to remove in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a photocatalysis type sewage treatment device with metal impurity removal effect for improving ultraviolet transmittance comprises a sewage treatment box, wherein the upper end of the sewage treatment box is movably connected with an upper cover, a rotating shaft is rotationally connected with the upper cover, a shaft coupler and a first motor are sequentially and fixedly connected with the upper end of the rotating shaft, water inlets which are symmetrically arranged are fixedly connected with the upper cover, supporting legs which are symmetrically arranged are fixedly connected with the lower end of the sewage treatment box, purple light lamps which are equidistantly distributed are fixedly connected with the lower end of the upper cover, L-shaped surrounding plates which are symmetrically arranged are fixedly connected with the inner side of the sewage treatment box, a strong magnetic roller is rotationally connected with the L-shaped surrounding plates, scrapers are fixedly connected with the inner sides of the left end and the right end of the sewage treatment box, an unloading base is fixedly connected with the upper end of the bottom in the L-, the sewage treatment tank is characterized in that symmetrically arranged fixing seats are fixedly connected to the inner side of the sewage treatment tank, the fixing seats are installed below the L-shaped enclosing plate, open grooves are formed in the inner sides of the fixing seats, a filter membrane is movably connected between each open groove and the corresponding open groove, an aeration pipe is arranged below the fixing seat in the sewage treatment tank, grids distributed at equal intervals are fixedly connected below the aeration pipe in the sewage treatment tank, a reinforcing rod is arranged between each aeration pipe and the inner wall of the sewage treatment tank, a second motor, an ultrasonic generator and an air inlet are sequentially and fixedly connected to the right end of the sewage treatment tank from top to bottom, aeration nozzles distributed at equal intervals are fixedly connected to the upper end of each aeration pipe, ultrasonic transducers distributed at equal intervals are fixedly connected to the lower end of the sewage treatment tank, a sludge tank is fixedly connected to the middle part of the lower, third motor upper end motor shaft extends toward the silt incasement, the third motor outside fixedly connected with blade in the silt incasement, silt case lower extreme right side fixedly connected with blowoff valve, metallic impurity discharge port and spacing groove have been down seted up in proper order from last in the both ends about the sewage treatment case, sliding connection has the stopper in the spacing groove, stopper outside fixedly connected with collecting box, the water overflow tank has all been seted up at both ends around the sewage treatment case, axis of rotation outside fixedly connected with dispersion plate, the puddler that axis of rotation lower extreme outside fixedly connected with equidistance distributes, upper cover lower extreme fixedly connected with fixture block, the draw-in groove has been seted up to sewage treatment case upper end.

Preferably, the connecting rod that the symmetry set up around fixedly connected with between first motor and upper cover, the material changing mouth that the equidistance distributes is seted up to sewage treatment case front end, the interior block of material changing mouth is connected with the baffle, sewage treatment case left end fixedly connected with delivery port.

Preferably, the grid is provided with 3, activated carbon particles and bentonite have been set gradually between grid and another grid, upper cover upper end fixedly connected with charge door, the distance of charge door to first motor is less than the radius of dispersion board.

Preferably, a limiting hole is formed in the inner side of the open slot, a spring and a marble are fixedly connected in sequence in the limiting hole from inside to outside, and the marble is connected with the filter membrane in a clamping manner.

Preferably, the second motor and the outer side of the rear end of the strong magnetic roller are fixedly connected with chain wheels, and the chain wheels and the outer side of the other chain wheel are meshed and connected with chains.

Preferably, the water inlet and the L-shaped coaming are aligned up and down, the distance from the water inlet to the inner side of the L-shaped coaming is smaller than the distance from the L-shaped coaming to the central point of the strong magnetic roller, and the water outlet through groove and the filter membrane are aligned up and down.

Preferably, the discharging base is of a right-angled triangle structure, one end, close to the outer side of the sewage treatment tank, of the discharging base is lower than the other end of the discharging base, and the lowest point of the discharging base is flush with the lowest point of the metal impurity discharging port.

Preferably, the limiting groove and the limiting block are both of T-shaped structures, and the width of the metal impurity discharge port is smaller than that of the collecting box.

Preferably, the highest point of the stirring rod is lower than the lowest point of the overflow tank, and the lowest point of the stirring rod is higher than the highest point of the aeration nozzle.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the photocatalytic sewage treatment equipment with the metal impurity removal effect, by designing the filter membrane, pollutants in water are selectively separated, and a sewage decolorant is uniformly dispersed into the sewage treatment box by matching with the use of the dispersion plate and the stirring rod, so that the decoloration effect on the sewage is improved, the color of the sewage is reduced, the transmittance of the ultraviolet lamp is improved, organic matters in the sewage are gradually reduced, and the treatment effect on the sewage is improved;

2. the photocatalysis type sewage treatment equipment with the metal impurity removal effect for improving the ultraviolet transmittance can initiate certain polymerization reaction under the irradiation of strong ultrasonic waves by using the ultrasonic generator and the ultrasonic transducer in a matching way, can degrade macromolecules by ultrasonic treatment, and ensures that microorganisms in a sewage treatment box have oxidative decomposition effect on organic matters in sewage under the condition of sufficient dissolved oxygen by the added aeration pipe and aeration nozzle;

3. this improve photocatalysis formula sewage treatment device that has metal edulcoration effect of ultraviolet ray transmittance through the design of strong magnetism cylinder, adsorbs the metal impurity in the sewage, then through the use of scraper, scrapes impurity down to in discharging into the collecting box through the base of unloading, the third motor and the blade that add disperse silt, avoid causing the exit blockage.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a schematic side view of the present invention;

FIG. 4 is a schematic top view of the present invention;

FIG. 5 is an enlarged view of the structure at A in FIG. 2 according to the present invention;

FIG. 6 is an enlarged view of the structure at B in FIG. 3 according to the present invention.

In the figure: 1. a sewage treatment tank; 2. an upper cover; 3. a rotating shaft; 4. a coupling; 5. a first motor; 6. a water inlet; 7. supporting legs; 8. an ultraviolet lamp; 9. an L-shaped coaming; 10. a strong magnetic roller; 11. a scraper; 12. a discharge base; 13. a water outlet through groove; 14. a fixed seat; 15. an open slot; 16. filtering the membrane; 17. an aeration pipe; 18. a grid; 19. a reinforcing rod; 20. a second motor; 21. an ultrasonic generator; 22. an air inlet; 23. an air nozzle; 24. an ultrasonic transducer; 25. a sludge tank; 26. a third motor; 27. a blade; 28. a blowoff valve; 29. a metal impurity discharge port; 30. a limiting groove; 31. a limiting block; 32. a collection box; 33. an overflow tank; 34. a dispersion plate; 35. a stirring rod; 36. a clamping block; 37. a card slot; 38. a connecting rod; 39. a material changing port; 40. a baffle plate; 41. a water outlet; 42. activated carbon particles; 43. bentonite; 44. a feed inlet; 45. a limiting hole; 46. a spring; 47. a marble; 48. a sprocket; 49. and a chain.

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. 1-6, the present invention provides a technical solution: a photocatalysis sewage treatment device with metal impurity removal effect for improving ultraviolet transmittance comprises a sewage treatment box 1, an upper cover 2, a rotating shaft 3, a coupler 4, a first motor 5, a water inlet 6, supporting legs 7, an ultraviolet lamp 8, an L-shaped enclosing plate 9, a strong magnetic roller 10, a scraper 11, a discharging base 12, a water outlet through groove 13, a fixed seat 14, an open groove 15, a filter membrane 16, an aeration pipe 17, a grating 18, a reinforcing rod 19, a second motor 20, an ultrasonic generator 21, an air inlet 22, an aeration nozzle 23, an ultrasonic transducer 24, a sludge box 25, a third motor 26, a blade 27, a pollution discharge valve 28, a metal impurity discharge port 29, a limit groove 30, a limit block 31, a collection box 32, an overflow groove 33, a dispersion plate 34, a stirring rod 35, a clamping block 36, a clamping groove 37, a connecting rod 38, a material changing port 39, a baffle 40, a water outlet 41, activated carbon particles 42, bentonite 43, A charging hole 44, a limit hole 45, a spring 46, a marble 47, a chain wheel 48 and a chain 49, wherein the upper end of the sewage treatment box 1 is movably connected with an upper cover 2, a rotating shaft 3 is rotatably connected in the upper cover 2, the upper end of the rotating shaft 3 is fixedly connected with a shaft coupling 4 and a first motor 5 in sequence, the upper end of the upper cover 2 is fixedly connected with water inlets 6 which are symmetrically arranged leftwards and rightwards, the lower end of the sewage treatment box 1 is fixedly connected with supporting legs 7 which are symmetrically arranged, the lower end of the upper cover 2 is fixedly connected with ultraviolet lamps 8 which are distributed at equal intervals, the inner side of the sewage treatment box 1 is fixedly connected with an L-shaped coaming 9 which is symmetrically arranged leftwards and rightwards, a strong magnetic roller 10 is rotatably connected in the L-shaped coaming 9, scrapers 11 are fixedly connected in the inner sides of the left and right ends of the sewage treatment box 1, the upper, the fixed seat 14 is arranged below the L-shaped coaming 9, the inner side of the fixed seat 14 is provided with an open slot 15, a filter membrane 16 is movably connected between the open slot 15 and the other corresponding open slot 15, an aeration pipe 17 is arranged below the fixed seat 14 in the sewage treatment box 1, a grating 18 which is distributed equidistantly is fixedly connected below the aeration pipe 17 in the sewage treatment box 1, a reinforcing rod 19 is arranged between the aeration pipe 17 and the inner wall of the sewage treatment box 1, the right end of the sewage treatment box 1 is fixedly connected with a second motor 20, an ultrasonic generator 21 and an air inlet 22 from top to bottom in sequence, the upper end of the aeration pipe 17 is fixedly connected with an aeration nozzle 23 which is distributed equidistantly, the lower end of the sewage treatment box 1 is fixedly connected with an ultrasonic transducer 24 which is distributed equidistantly, the middle part of the lower end of the sewage treatment box 1 is fixedly connected with a sludge box 25, the lower end of the sludge, a blade 27 is fixedly connected to the outer side of a third motor 26 in the sludge box 25, a drain valve 28 is fixedly connected to the right side of the lower end of the sludge box 25, a metal impurity discharge port 29 and a limiting groove 30 are sequentially formed in the left end and the right end of the sewage treatment box 1 from top to bottom, a limiting block 31 is slidably connected in the limiting groove 30, a collecting box 32 is fixedly connected to the outer side of the limiting block 31, overflow grooves 33 are formed in the front end and the rear end of the sewage treatment box 1, a dispersion plate 34 is fixedly connected to the outer side of a rotating shaft 3, stirring rods 35 which are distributed at equal intervals are fixedly connected to the outer side of the lower end of the rotating shaft 3, a clamping block 36 is fixedly connected to the lower end of an upper cover 2, a clamping groove 37 is formed in the upper end of the sewage treatment box 1;

furthermore, connecting rods 38 which are symmetrically arranged in the front and back are fixedly connected between the first motor 5 and the upper cover 2, material changing ports 39 which are distributed at equal intervals are formed in the front end of the sewage treatment box 1, a baffle plate 40 is connected in the material changing ports 39 in a clamping manner, a water outlet 41 is fixedly connected to the left end of the sewage treatment box 1, and activated carbon particles 42 and bentonite 43 can be conveniently changed through the material changing ports 39;

furthermore, 3 grids 18 are arranged, activated carbon particles 42 and bentonite 43 are sequentially arranged between one grid 18 and the other grid 18, the upper end of the upper cover 2 is fixedly connected with a feeding port 44, the distance from the feeding port 44 to the first motor 5 is smaller than the radius of the dispersion plate 34, and the treatment effect on sewage is improved through the design of the activated carbon particles 42 and the bentonite 43;

furthermore, a limiting hole 45 is formed in the inner side of the open slot 15, a spring 46 and a marble 47 are fixedly connected in the limiting hole 45 from inside to outside in sequence, and the marble 47 is connected with the filter membrane 16 in a clamping manner, so that the stability of the position of the filter membrane 16 is ensured, and the filter membrane 16 is convenient to disassemble and assemble;

furthermore, the chain wheel 48 is fixedly connected to the outer sides of the rear ends of the second motor 20 and the strong magnetic roller 10, the chain 49 is meshed with the outer sides of the chain wheel 48 and the other chain wheel 48, and the chain wheel 48 and the chain 49 are matched to drive the strong magnetic roller 10 to rotate, so that the number of the second motors 20 is reduced, and the cost is reduced;

further, the water inlet 6 is aligned with the L-shaped coaming 9 up and down, the distance from the water inlet 6 to the inner side of the L-shaped coaming 9 is smaller than the distance from the L-shaped coaming 9 to the central point of the strong magnetic roller 10, the water outlet through groove 13 is aligned with the filter membrane 16 up and down, and the sewage flowing down from the water outlet through groove 13 is ensured to be filtered by the filter membrane 16;

furthermore, the discharge base 12 is in a right-angled triangle structure, one end of the discharge base 12 close to the outer side of the sewage treatment tank 1 is lower than the other end of the discharge base 12, and the lowest point of the discharge base 12 is flush with the lowest point of the metal impurity discharge port 29, so that the metal impurities can be conveniently discharged through the design of the discharge base 12;

furthermore, the limiting groove 30 and the limiting block 31 are both of a T-shaped structure, and the width of the metal impurity discharge port 29 is smaller than that of the collecting box 32, so that the metal impurities can be conveniently collected;

further, the highest point of the stirring rod 35 is lower than the lowest point of the overflow tank 33, and the lowest point of the stirring rod 35 is higher than the highest point of the aeration nozzle 23, so that the normal use of the stirring rod 35 is ensured.

The working principle is as follows: firstly, compressed air is introduced from an air inlet 22, an ultraviolet lamp 8, a second motor 20 and an ultrasonic generator 21 are turned on, the second motor 20 drives a chain wheel 48 and a chain 49 to rotate, a strong magnetic roller 10 on the inner side of the chain wheel 48 synchronously rotates, sewage is introduced into a water inlet 6 and falls on the strong magnetic roller 10, metal impurities in the sewage are adsorbed on the strong magnetic roller 10, the metal impurities are scraped off under the action of a scraper 11 and fall on a discharging base 12 and then fall into a collecting box 32, the sewage after the metal impurities are removed enters a sewage treatment box 1 after being filtered by a filter membrane 16 from a water outlet through groove 13, a first motor 5 is turned on, the first motor 5 drives a coupler 4 and a rotating shaft 3 to rotate, a decolorizing agent and a semiconductor catalyst are added into a feed inlet 44, the decolorizing agent falls on a dispersion plate 34 and is dispersed in the sewage treatment box 1, the decolorizing agent is better mixed with the sewage under the action of a stirring rod 35, compressed air enters the aeration pipe 17 from the air inlet 22 and escapes from the aeration pipe through the aeration nozzle 23, the ultrasonic generator 21 sends a high-frequency oscillation signal, the high-frequency mechanical oscillation signal is converted into high-frequency mechanical oscillation through the ultrasonic transducer 24 and is transmitted into sewage, certain polymerization reaction can be initiated under the irradiation of strong ultrasonic waves, macromolecules can be degraded through ultrasonic treatment, the sewage is decolorized by matching with the use of active carbon particles 42 and bentonite 43, the transmittance of ultraviolet rays is improved, organic pollutants are treated by a catalyst under the irradiation of the ultraviolet lamp 8 and are gradually degraded, the water outlet 41 is opened, the sewage is discharged, then the third motor 26 is opened, the third motor 26 drives the blade 27 to rotate, sludge at the bottom in the sewage treatment box 1 is scattered and is discharged through the blow-off valve 28 to prevent blockage, finally the collection box 32 is pulled outwards, and the limit block 31 on the inner side of the collection box 32 slides in, the collection container 32 is removed and the metallic impurities in the collection container 32 are poured out, and then the collection container 32 is returned.

Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides an improve photocatalysis formula sewage treatment device that has metal edulcoration effect of ultraviolet ray transmittance, includes sewage treatment case (1), its characterized in that: the upper end of the sewage treatment box (1) is movably connected with an upper cover (2), a rotating shaft (3) is connected in the upper cover (2) in a rotating manner, a shaft coupler (4) and a first motor (5) are fixedly connected to the upper end of the rotating shaft (3) in sequence, water inlets (6) are fixedly connected to the upper end of the upper cover (2) in a bilateral symmetry manner, supporting legs (7) are fixedly connected to the lower end of the sewage treatment box (1) in a symmetric manner, purple light lamps (8) are fixedly connected to the lower end of the upper cover (2) in an equidistant manner, L-shaped coamings (9) are fixedly connected to the inner side of the sewage treatment box (1) in a bilateral symmetry manner, a strong magnetic roller (10) is rotatably connected to the inner side of the L-shaped coamings (9), scrapers (11) are fixedly connected to the inner sides of the left end and, a water outlet through groove (13) is formed in the lower end of the L-shaped coaming (9), symmetrically arranged fixing seats (14) are fixedly connected to the inner side of the sewage treatment tank (1), the fixing seats (14) are installed below the L-shaped coaming (9), an open groove (15) is formed in the inner side of each fixing seat (14), a filter membrane (16) is movably connected between each open groove (15) and the corresponding open groove (15), an aeration pipe (17) is arranged below each fixing seat (14) in the sewage treatment tank (1), grids (18) which are distributed at equal intervals are fixedly connected below each aeration pipe (17) in the sewage treatment tank (1), a reinforcing rod (19) is arranged between each aeration pipe (17) and the inner wall of the sewage treatment tank (1), and a second motor (20), an ultrasonic generator (21) and an air inlet (22) are fixedly connected to the right end of the sewage treatment tank (1) from top to bottom in, aeration nozzles (23) distributed at equal intervals are fixedly connected at the upper end of the aeration pipe (17), ultrasonic transducers (24) distributed at equal intervals are fixedly connected at the lower end of the sewage treatment tank (1), a sludge tank (25) is fixedly connected at the middle part of the lower end of the sewage treatment tank (1), a third motor (26) is fixedly connected at the lower end of the sludge tank (25), a motor shaft at the upper end of the third motor (26) extends into the sludge tank (25), a blade (27) is fixedly connected at the outer side of the third motor (26) in the sludge tank (25), a blowoff valve (28) is fixedly connected at the right side of the lower end of the sludge tank (25), a metal impurity discharge port (29) and a limiting groove (30) are sequentially arranged at the left end and the right end of the sewage treatment tank (1) from top to bottom, a limiting block (31) is slidably connected in the limiting groove (30), and a collecting tank (32, overflow tank (33) have all been seted up at both ends around sewage treatment case (1), axis of rotation (3) outside fixedly connected with dispersion plate (34), puddler (35) that axis of rotation (3) lower extreme outside fixedly connected with equidistance distributed, upper cover (2) lower extreme fixedly connected with fixture block (36), draw-in groove (37) have been seted up to sewage treatment case (1) upper end.

2. The photocatalytic sewage treatment device with the metal impurity removal effect for improving the transmittance of ultraviolet rays according to claim 1, wherein: connecting rod (38) that the symmetry set up around fixedly connected with between first motor (5) and upper cover (2), material changing mouth (39) that the equidistance distributes are seted up to sewage treatment case (1) front end, the joint is connected with baffle (40) in material changing mouth (39), sewage treatment case (1) left end fixedly connected with delivery port (41).

3. The photocatalytic sewage treatment device with the metal impurity removal effect for improving the transmittance of ultraviolet rays according to claim 1, wherein: grid (18) are provided with 3, activated carbon particle (42) and bentonite (43) have set gradually between grid (18) and another grid (18), upper cover (2) upper end fixedly connected with charge door (44), the distance of charge door (44) to first motor (5) is less than the radius of dispersion board (34).

4. The photocatalytic sewage treatment device with the metal impurity removal effect for improving the transmittance of ultraviolet rays according to claim 1, wherein: spacing hole (45) have been seted up to open slot (15) inboard, fixedly connected with spring (46) and marble (47) from inside to outside in proper order in spacing hole (45), marble (47) and filter membrane (16) are the block and are connected.

5. The photocatalytic sewage treatment device with the metal impurity removal effect for improving the transmittance of ultraviolet rays according to claim 1, wherein: the outer sides of the rear ends of the second motor (20) and the strong magnetic roller (10) are fixedly connected with a chain wheel (48), and the outer sides of the chain wheel (48) and the other chain wheel (48) are meshed with a chain (49).

6. The photocatalytic sewage treatment device with the metal impurity removal effect for improving the transmittance of ultraviolet rays according to claim 1, wherein: the water inlet (6) and the L-shaped coaming (9) are aligned up and down, the distance from the water inlet (6) to the inner side of the L-shaped coaming (9) is smaller than the distance from the L-shaped coaming (9) to the central point of the strong magnetic roller (10), and the water outlet through groove (13) and the filter membrane (16) are aligned up and down.

7. The photocatalytic sewage treatment device with the metal impurity removal effect for improving the transmittance of ultraviolet rays according to claim 1, wherein: the discharging base (12) is of a right-angled triangle structure, one end, close to the outer side of the sewage treatment box (1), of the discharging base (12) is lower than the other end of the discharging base (12), and the lowest point of the discharging base (12) is flush with the lowest point of the metal impurity discharging port (29).

8. The photocatalytic sewage treatment device with the metal impurity removal effect for improving the transmittance of ultraviolet rays according to claim 1, wherein: the limiting groove (30) and the limiting block (31) are both of T-shaped structures, and the width of the metal impurity discharge port (29) is smaller than that of the collecting box (32).

9. The photocatalytic sewage treatment device with the metal impurity removal effect for improving the transmittance of ultraviolet rays according to claim 1, wherein: the highest point of the stirring rod (35) is lower than the lowest point of the overflow tank (33), and the lowest point of the stirring rod (35) is higher than the highest point of the aeration nozzle (23).