A far ultraviolet photolysis and oxidation coupled sewage treatment device

Abstract

The present application relates to a kind of far ultraviolet photolysis and oxidation coupling sewage treatment device, including treatment pool body, the side of treatment pool body is equipped with water inlet pipe and oxidant pipe, respectively for input sewage and oxidant, opposite side is equipped with overflow effluent weir, the inside of treatment pool body includes shallow clear zone from top to bottom, turbidity zone, heavy turbidity zone and hopper zone;Shallow clear zone is uniformly provided with several vertical far ultraviolet lamp one, turbidity zone and heavy turbidity zone are uniformly provided with several rotatable photolysis components, photolysis component includes center shaft and the upper photolysis part and lower photolysis part on center shaft, upper photolysis part is in turbidity zone, lower photolysis part is in heavy turbidity zone;Upper photolysis part includes several far ultraviolet lamp two around center shaft, lower photolysis part includes several horizontal far ultraviolet lamp three around center shaft;Far ultraviolet lamp one and photolysis component provide light source for the region of different sludge content in treatment pool body, for photolysis pollutant in sewage.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment device with far ultraviolet photolysis and oxidation coupling. BACKGROUND

[0002] With the improvement of people's living standards and the development of industrial technology, people are constantly trying to use new substances in life and production to obtain better products, and these new raw material substances and products produced will be discharged into domestic sewage or industrial wastewater, resulting in an increase in the content of new types of pollutants in the sewage, and some pollutants generated in the sewage treatment process, which further increases the diversity of pollutants in the sewage. New pollutants, including antibiotics and endocrine disruptors, can adversely affect human health and the environment. At present, the domestic sewage treatment standard only stipulates the discharge standards of conventional pollutants such as COD, total nitrogen, total phosphorus and SS, and does not make more detailed division, nor does it have specific restrictions on new pollutants. Therefore, the current sewage treatment process and equipment do not have effective treatment means for new pollutants. SUMMARY

[0003] In view of the above problems, the application provides a sewage treatment device with far ultraviolet photolysis and oxidation coupling, which comprises a treatment tank body, a water inlet pipe and an oxidant pipe are arranged on one side of the treatment tank body and are used for inputting sewage and oxidant respectively, an overflow water weir is arranged on the opposite side, and the inside of the treatment tank body comprises a shallow clear zone, a turbid zone, a heavy turbid zone and a sludge hopper zone from top to bottom.

[0004] A plurality of vertical far ultraviolet lamps one are uniformly arranged in the shallow clear zone, a plurality of rotatable photolysis assemblies are uniformly arranged in the turbid zone and the heavy turbid zone, the photolysis assembly comprises a central rotating shaft and an upper photolysis part and a lower photolysis part on the central rotating shaft, the upper photolysis part is located in the turbid zone, and the lower photolysis part is located in the heavy turbid zone; the upper photolysis part comprises a plurality of far ultraviolet lamps two around the central rotating shaft, and the lower photolysis part comprises a plurality of horizontal far ultraviolet lamps three around the central rotating shaft; the far ultraviolet lamps one and the photolysis assemblies provide light sources for different sludge content regions in the treatment tank body and are used for photolyzing pollutants in the sewage.

[0005] Optionally, the setting height of the water inlet pipe corresponds to the height of the middle part of the heavy turbid zone, and the sewage is input into the heavy turbid zone; the setting height of the oxidant pipe corresponds to the height of the middle part of the shallow clear zone, and the oxidant is in countercurrent contact with the sewage to oxidize and treat the pollutants in the sewage; an outlet water tank is arranged outside the overflow water weir, and an outlet water pipe is arranged in the outlet water tank and is used for discharging the produced water after treatment.

[0006] Optionally, the oxidant is sodium percarbonate, which is an addition compound of hydrogen peroxide and sodium carbonate and can effectively remove new pollutants in the sewage.

[0007] Optionally, the far-ultraviolet lamp one, the far-ultraviolet lamp two and the far-ultraviolet lamp three are all excimer ultraviolet lamps that can emit light with a wavelength of 222 nm.

[0008] Optionally, the outer side of the far-ultraviolet lamp is covered with a quartz tube, the bottom of the quartz tube is closed, and the top is open for installing the far-ultraviolet lamp, and the wire is passed through the opening and then connected to the power supply outside the treatment tank body;

[0009] Several far-ultraviolet lamps are evenly distributed in the shallow clear area in a matrix shape. The bottom of the quartz tube and the far-ultraviolet lamp are at the bottom of the shallow clear area. The top of the quartz tube passes through the water surface of the treatment tank to prevent sewage from entering the quartz tube. The ratio of the height of the far-ultraviolet lamp to the height of the shallow clear area is (0.6-0.8):1.

[0010] Further optionally, an annular cleaning brush is provided on the outside of the quartz tube 1, and the inner wall of the annular cleaning brush is evenly and densely covered with bristles. The bristles protrude toward the inside of the annular cleaning brush and can contact the outer wall of the quartz tube 1. The annular cleaning brush is connected to the telescopic end of the external hydraulic mechanism through at least two vertical straight rods. The hydraulic mechanism is arranged above the treatment tank body. The two straight rods are symmetrically arranged, which can drive the annular cleaning brush to move up and down along the quartz tube 1, so that the bristles clean the pollutants and sludge attached to the outer wall of the quartz tube 1, thereby ensuring the transmittance of light.

[0011] Optionally, the central rotating shaft of the photolysis component is vertically arranged, and the top of the central rotating shaft passes through the liquid surface of the shallow clear area, and is then connected to an external motor, and the motor drives the upper photolysis part and the lower photolysis part to rotate through the central rotating shaft; the central rotating shaft is arranged at the center of the area between the four far-ultraviolet lamps, and the circular area where the four far-ultraviolet lamps are located is the far-ultraviolet lamp one photolysis area.

[0012] Optionally, the several far-ultraviolet lamps 2 of the upper photolysis section are evenly arranged around the outside of the central rotating shaft and form a circle, which is the upper photolysis center area; the far-ultraviolet lamp 2 is vertically arranged, and the outside is covered with a quartz tube 2, the upper and lower ends of the quartz tube 2 are sealed by waterproof covers, and the upper and lower waterproof covers are respectively connected to the central rotating shaft through a connecting rod; the height of the far-ultraviolet lamp 2 is equal to the height of the turbidity zone.

[0013] Further optionally, the ratio of the diameter of the upper photolysis central area to the diameter of the far-ultraviolet lamp 1 photolysis area is (0.5-1):1; the number of the far-ultraviolet lamps 2 in the upper photolysis part is 4-8.

[0014] Optionally, the lower photolysis part is in the middle of the heavy turbidity area, and comprises a horizontal support frame for placing the third far ultraviolet lamp, the support frame comprises a plurality of support rods one and a plurality of support rods two, one end of the support rod one is connected to the bottom of the central rotating shaft, the other end extends away from the central rotating shaft, the plurality of support rods one are evenly distributed along the circumference of the central rotating shaft with the central rotating shaft as the center, the support rod two is connected between the ends of the two support rods one away from the central rotating shaft, and the support rod two forms a polygon outside the central rotating shaft;

[0015] The third far ultraviolet lamp is fixed on the upper surface and the lower surface of the support rod one and the support rod two, and provides light source for the heavy turbidity area.

[0016] Further optionally, the vertices of the polygon formed by the support rod two constitute a circle, the circle is a lower photolysis center area, and the ratio of the diameter of the circle to the diameter of the photolysis area of the first far ultraviolet lamp is (0.8-1):1, so as to ensure that sufficient light energy is provided for the heavy turbidity area.

[0017] Optionally, a mud catching net is arranged below the support frame, the mud catching net comprises a circular frame part at the upper portion and a conical part at the lower portion, the top of the circular frame part is connected to the support rod two, the circular frame part is provided with a hollow cylindrical frame, the diameter of the frame is equal to the diameter of the lower photolysis center area, and the outer side of the frame is covered with a mesh;

[0018] The side of the circular frame part is provided with an openable and closable mud catching door, so that the sludge in the heavy turbidity area can enter the mud catching net through the mud catching door; the conical part is a mesh bag with a large upper portion and a small lower portion, the bottom of the mud catching net is open, and corresponds to a mud bucket, and the sludge captured by the mud catching net is discharged into the mud bucket. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the far ultraviolet photolysis and oxidation coupled sewage treatment device;

[0020] Figure 2 It is a top view schematic view of the lower photolysis part;

[0021] Figure 3 It is a schematic view of the outside of the first far ultraviolet lamp;

[0022] Figure 4 It is a schematic view of the mud catching net.

[0023] In the accompanying drawings, 1-treatment tank body, 2-water inlet pipe, 3-oxidant pipe, 4-overflow weir, 5-shallow clear area, 6-turbid area, 7-severe turbidity area, 8-mud hopper area, 9-far ultraviolet lamp one, 10-far ultraviolet lamp two, 11-far ultraviolet lamp three, 12-central rotating shaft, 13-upper photolysis part, 14-lower photolysis part, 15-quartz tube one, 16-annular cleaning brush, 17-straight rod, 18-hydraulic mechanism, 19-connecting rod, 20-support frame, 21-support rod one, 22-support rod two, 23-mud catching net, 24-circular frame part, 25-conical part, 26-mud catching door, 27-mud hopper. DETAILED DESCRIPTION

[0024] This embodiment provides a sewage treatment device that couples far-ultraviolet photolysis and oxidation, such as Figure 1-Figure 4 As shown, it includes a treatment tank body 1, with a water inlet pipe 2 and an oxidant pipe 3 provided on one side of the treatment tank body 1 for inputting sewage and oxidant respectively, and an overflow weir 4 provided on the other side thereof. The interior of the treatment tank body 1 includes, from top to bottom, a shallow clear area 5, a turbid area 6, a heavily turbid area 7, and a mud hopper area 8;

[0025] Several vertical far-ultraviolet lamps 9 are evenly arranged in the shallow clear area 5, and several rotatable photolysis components are evenly arranged in the turbid area 6 and the severely turbid area 7. The photolysis component includes a central rotation axis 12 and an upper photolysis part 13 and a lower photolysis part 14 on the central rotation axis 12. The upper photolysis part 13 is in the turbid area 6, and the lower photolysis part 14 is in the severely turbid area 7; the upper photolysis part 13 includes several far-ultraviolet lamps 2 10 around the central rotation axis 12, and the lower photolysis part 14 includes several horizontal far-ultraviolet lamps 3 11 around the central rotation axis 12; the far-ultraviolet lamps 9 and the photolysis components provide light sources for areas with different sludge contents in the treatment tank body 1, which are used to photolyze pollutants in sewage.

[0026] Optionally, the shape of the treatment tank body 1 is determined according to actual needs and can be selected from square or circular. Existing sewage treatment tanks can also be used to save the cost of building a new tank body.

[0027] The water inlet pipe 2 is set at a height corresponding to the middle of the heavy turbidity zone 7, and the sewage is input into the heavy turbidity zone 7; the oxidant pipe 3 is set at a height corresponding to the middle of the shallow clear zone 5, and the oxidant contacts the sewage in countercurrent to oxidize and treat the pollutants in the sewage; an outlet trough is provided on the outside of the overflow outlet weir 4, and the outlet trough is equipped with an outlet pipe for discharging the treated produced water.

[0028] Optionally, the oxidant is sodium percarbonate, which is an addition compound of hydrogen peroxide and sodium carbonate and can effectively remove new pollutants in sewage.

[0029] Optionally, the far-ultraviolet lamp one, the far-ultraviolet lamp two and the far-ultraviolet lamp three are all excimer ultraviolet lamps that can emit light with a wavelength of 222 nm.

[0030] The present invention uses far ultraviolet lamp, the photon energy of which at 222nm reaches 539kJ einstein -1 , higher than that of general ultraviolet lamps, can increase the direct photolysis rate of organic pollutants, and cooperate with the oxidation effect of sodium percarbonate. The oxidant has a higher molar absorption coefficient and / or quantum yield at 222nm, which is conducive to the oxidant to produce a higher concentration of free radicals, thereby improving the degradation efficiency of pollutants.

[0031] The present invention utilizes the oxidative action of an oxidant and the photolytic action of a far-ultraviolet lamp to degrade new pollutants in wastewater. This reaction produces sludge, which sinks into a sludge hopper 27 and is then discharged from the treatment tank 1. The treatment tank 1 is divided, from top to bottom, into a shallow clear zone 5, a turbid zone 6, and a heavily turbid zone 7, according to sludge content, with sludge increasing as one moves downward. The far-ultraviolet lamp achieves photolysis by emitting light into the water. As sludge content increases, it blocks the light's path, increasing refraction and reflection, severely impacting the photolysis effect. Furthermore, the influent of the treatment tank 1 is located in the heavily turbid zone 7, where pollutant concentrations are high, resulting in a heavy treatment load. This further increases the need to ensure the effective transmission and utilization of far-ultraviolet light. To address this issue, the present invention has designed the far-ultraviolet lamp 9 and photolysis assembly, providing different far-ultraviolet lamp types for different zones.

[0032] Optionally, the outer side of the far-ultraviolet lamp 9 is covered with a quartz tube 15, which not only protects the far-ultraviolet lamp 9 and the internal circuit, but also allows the light of the far-ultraviolet lamp 9 to pass through the quartz tube 15. The bottom of the quartz tube 15 is closed and the top is open for installing the far-ultraviolet lamp 9. The wire passes through the opening and is then connected to the power supply outside the treatment tank body 1.

[0033] Several far-ultraviolet lamps 9 are evenly distributed in the shallow clear area 5 in a matrix shape. The bottom of the quartz tube 15 and the far-ultraviolet lamp 9 are at the bottom of the shallow clear area 5. The top of the quartz tube 15 passes through the water surface of the treatment tank body 1 to prevent sewage from entering the quartz tube 15. The ratio of the height of the far-ultraviolet lamp 9 to the height of the shallow clear area 5 is (0.6-0.8):1.

[0034] Far-UV lamps 9 are supported by brackets within the shallow clear zone 5. The shallow clear zone 5 has a low sludge content and relatively clear water quality. As sewage rises to the shallow clear zone 5, the pollutant content in the water is low, resulting in a low treatment load for the shallow clear zone 5. This is especially true for the water in the upper portion of the shallow clear zone 5, where the water quality is good and ready to overflow from the treatment tank 1. Given the aforementioned characteristics of the shallow clear zone 5, the far-UV lamps 9 can be evenly distributed using conventional methods. They do not need to cover the entire shallow clear zone 5; covering the middle and lower portions is sufficient, thus conserving energy.

[0035] Further optionally, an annular cleaning brush 16 is provided on the outside of the quartz tube 15, and the inner wall of the annular cleaning brush 16 is evenly and densely covered with bristles. The bristles protrude toward the inside of the annular cleaning brush 16 and can contact the outer wall of the quartz tube 15. The annular cleaning brush 16 is connected to the telescopic end of the external hydraulic mechanism 18 through at least two vertical straight rods 17. The hydraulic mechanism 18 is arranged above the treatment tank body 1. The two straight rods 17 are symmetrically arranged, which can drive the annular cleaning brush 16 to move up and down along the quartz tube 15, so that the bristles clean the pollutants and sludge attached to the outer wall of the quartz tube 15, thereby ensuring the transmittance of light.

[0036] Optionally, the central rotating shaft 12 of the photolysis component is vertically arranged, and the top of the central rotating shaft 12 passes through the liquid surface of the shallow clear area 5, and is then connected to an external motor. The motor drives the upper photolysis part 13 and the lower photolysis part 14 to rotate through the central rotating shaft 12; the central rotating shaft 12 is arranged at the center of the area between the four far-ultraviolet lamps 9, and the circular area where the four far-ultraviolet lamps 9 are located is the far-ultraviolet lamp 9 photolysis area.

[0037] Optionally, the several far-ultraviolet lamps 10 of the upper photolysis section 13 are evenly arranged around the outside of the central rotating shaft 12 and form a circle, which is the upper photolysis center area; the far-ultraviolet lamp 10 is vertically arranged, and the outside is covered with a quartz tube 2, and the upper and lower ends of the quartz tube 2 are sealed by waterproof covers, and the upper and lower waterproof covers are respectively connected to the central rotating shaft 12 through a connecting rod 19; the height of the far-ultraviolet lamp 10 is equal to the height of the turbidity zone 6.

[0038] Further optionally, the connecting rod 19 can be set horizontally or inclined. When set inclined, the end of the connecting rod 19 at the upper part connected to the central shaft 12 is higher than the end connected to the top of the two quartz tubes, and the end of the connecting rod 19 at the bottom part connected to the central shaft 12 is lower than the end connected to the bottom of the two quartz tubes, so that the upper photolysis part 13 forms a shuttle shape.

[0039] Further optionally, the ratio of the diameter of the upper photolysis center area to the diameter of the far-ultraviolet lamp 10 is (0.5-1):1; the number of the far-ultraviolet lamps 10 in the upper photolysis part 13 is 4-8.

[0040] Because the sludge content in turbid zone 6 is greater than that in shallow clear zone 5, upper photolysis section 13 is designed as a ring of far-UV lamps 2 10, increasing the light energy density and ensuring that the water body is exposed to light. The rotation of upper photolysis section 13 not only promotes the mixing of sewage and oxidant, improving treatment efficiency, but also agitates the sludge in turbid zone 6, promoting its even distribution within the turbid zone 6, to a certain extent evenly diluting the sludge concentration in the turbid zone 6 and alleviating the sludge's obstruction to the light of upper photolysis section 13. The rotation of upper photolysis section 13 also reduces the adhesion of pollutants to the exterior of quartz tube 2, removing any newly attached pollutants and sludge. The surrounding sludge or particles in motion scrape against the outer wall of quartz tube 2, removing any attached matter.

[0041] Optionally, the lower photolysis section 14 is located in the middle of the severe turbidity zone 7 and includes a horizontal support frame 20 for placing the far-ultraviolet lamp three 11. The support frame 20 includes a plurality of support rods 21 and a plurality of support rods 22. One end of the support rod 21 is connected to the bottom of the central rotation axis 12, and the other end extends in a direction away from the central rotation axis 12. With the central rotation axis 12 as the center of the circle, the plurality of support rods 21 are radially distributed along the circumference of the central rotation axis 12. A support rod 22 is connected between the ends of the two support rods 21 away from the central rotation axis 12, and the support rods 22 form a polygon on the outside of the central rotation axis 12.

[0042] The far ultraviolet lamp 3 11 is fixed on the upper surface and the lower surface of the support rod 1 21 and the support rod 2 22 to provide a light source for the heavily turbid area 7 .

[0043] Further optionally, the outer side of the far ultraviolet lamp 3 11 is covered with a quartz tube 3, and both ends of the quartz tube 3 are sealed by waterproof covers.

[0044] Further optionally, the vertices of the polygon surrounded by the second support rod 22 form a circle, which is the lower photolysis center area, and the ratio of its diameter to the diameter of the photolysis area of ​​the far ultraviolet lamp 9 is (0.8-1):1, ensuring that sufficient light energy is provided for the severely turbid area 7.

[0045] Both far-ultraviolet lamp 2 10 and far-ultraviolet lamp 3 11 are rechargeable and do not need to be connected to an external power supply in the treatment tank body 1. When charging is required, the upper photolysis part 13 and the lower photolysis part 14 are raised through the central rotating shaft 12 to charge the far-ultraviolet lamp 2 10 and far-ultraviolet lamp 3 11 and clean the quartz tube 2 and quartz tube 3.

[0046] Optionally, a mud catching net 23 is provided below the support frame 20. The mud catching net 23 includes an upper circular frame portion 24 and a lower conical portion 25. The top of the circular frame portion 24 is connected to the support rod 22. The circular frame portion 24 is provided with a hollow cylindrical frame. The diameter of the frame is equal to the diameter of the lower photolysis center area. The outer side of the frame is covered with a mesh.

[0047] An openable and closable mud-catching door 26 is provided on the side of the circular frame portion 24 , so that the sludge in the heavily turbid area 7 can enter the mud-catching net 23 through the mud-catching door 26 ; the conical portion 25 is a net bag that is larger at the top and smaller at the bottom, and the bottom of the mud-catching net 23 is open and corresponds to a mud hopper 27 , into which the sludge captured by the mud-catching net 23 is discharged.

[0048] Further optionally, the mud catching door 26 is a part of the cylindrical frame, and one side of the mud catching door 26 is hinged to the cylindrical frame and can be opened or closed under the action of water. The outer side of the mud catching door 26 is covered with a mesh, and the area of ​​the cylindrical frame corresponding to the inner side of the mud catching door 26 has no mesh. When the mud catching door 26 is opened, the sludge in the heavy turbidity area 7 can enter the mud catching net 23.

[0049] Optionally, a plurality of conical mud hoppers 27 are evenly arranged in the mud hopper area 8, and the sludge produced by the reaction of the shallow clear area 5, the turbid area 6, and the heavy turbid area 7 falls into the mud hopper 27. A mud discharge pipe is provided at the bottom of each mud hopper 27 for discharging the sludge accumulated in the mud hopper 27.

[0050] Because the heavily turbid zone 7 contains a large amount of sludge, the sludge is difficult to settle due to the agitation of the incoming water and the lower photolysis section 14. Therefore, the present invention incorporates a sludge trap 23 to capture the sludge in the lower portion of the heavily turbid zone 7. This sludge is relatively mature and contains larger particles, making it easier to capture. The upper portion of the sludge trap 23 rotates with the lower photolysis section 14. When the rotation direction of the lower photolysis section 14 coincides with the direction in which the sludge trap door 26 is opened, hydraulic pressure closes the sludge trap door 26. When the rotation direction of the lower photolysis section 14 is opposite to the direction in which the sludge trap door 26 is opened, hydraulic pressure opens the sludge trap door 26. The agitation of the lower photolysis section 14 causes the surrounding sludge to rotate, generating centrifugal force. Larger sludge particles experience greater centrifugal force, making it easier for the sludge to pass through the sludge gate 26 and enter the sludge net 23, where it settles. The conical section 25 further collects the sludge, forming larger particles and accelerating its settling within the net. The sludge then flows directly through the bottom opening of the conical section 25 into the sludge hopper 27. One sludge hopper 27 can correspond to one or more conical sections 25.

[0051] The sludge trap 23 captures part of the sludge in the lower part of the heavy turbidity zone 7, reducing the sludge content in this area, providing a good environment for photolysis, and increasing the light propagation range.

[0052] The following examples use the far-ultraviolet photolysis and oxidation coupled sewage treatment device of the present invention to treat new pharmaceutical pollutants in the secondary effluent of a sewage treatment plant. The concentration of amoxicillin in the sewage is 0.5 μmol / L, the treatment capacity is 5 tons / day, the addition concentration of the oxidant percarbonate is 0.5 mmol / L, the pH of the treatment tank is set to 7, and the treatment time is 10 minutes.

[0053] Example 1

[0054] The far-ultraviolet photolysis and oxidation coupled sewage treatment device used in this embodiment includes the above-mentioned treatment tank body, water inlet pipe, oxidant pipe, overflow outlet weir, shallow clear area, turbid area, severely turbid area, mud hopper area, far-ultraviolet lamp 1, far-ultraviolet lamp 2, far-ultraviolet lamp 3, central rotating shaft, upper photolysis part, lower photolysis part, quartz tube 1, annular cleaning brush, straight rod, hydraulic mechanism, connecting rod, support frame, support rod 1, support rod 2, mud catching net, circular frame part, conical part, mud catching door, and mud hopper, and the above-mentioned various structural components are arranged in the above-mentioned form, and the overflow outlet weir discharges the produced water.

[0055] Eight far-UV lamps (I) are arranged in a matrix within the shallow clean area, with a height ratio of 0.8:1 between the far-UV lamps (I) and the shallow clean area. A central axis for the photolysis assembly is located at the center of the circular area containing four far-UV lamps (I), for a total of three photolysis assemblies. Each upper photolysis section includes six far-UV lamps (II), and each lower photolysis section includes six support rods (I) and six support rods (II). The mud hopper area is equipped with three mud hoppers, each corresponding to the mud catcher nets of the photolysis assembly.

[0056] In this embodiment, the ratio of the diameter of the upper photolysis center area to the diameter of the far-ultraviolet lamp photolysis area is 0.5:1; the vertices of the polygon surrounded by the two support rods form a circle, which is the lower photolysis center area, and the ratio of its diameter to the diameter of the far-ultraviolet lamp photolysis area is 0.8:1.

[0057] Example 2

[0058] The far-ultraviolet photolysis and oxidation coupled sewage treatment device used in this embodiment is the same as that in Example 1, except that the ratio of the diameter of the upper photolysis center area to the diameter of the far-ultraviolet lamp photolysis area is 1:1.

[0059] Example 3

[0060] The far-ultraviolet photolysis and oxidation coupled sewage treatment device used in this embodiment is the same as that in Example 1, except that the ratio of the diameter of the upper photolysis center area to the diameter of the far-ultraviolet lamp-photolysis area is 0.4:1.

[0061] Example 4

[0062] The far-ultraviolet photolysis and oxidation coupled sewage treatment device used in this embodiment is the same as that in Example 1, except that the ratio of the diameter of the lower photolysis center area to the diameter of the far-ultraviolet lamp first photolysis area is 1:1.

[0063] Example 5

[0064] The far-ultraviolet photolysis and oxidation coupled sewage treatment device used in this embodiment is the same as that in Example 1, except that the ratio of the diameter of the lower photolysis center area to the diameter of the far-ultraviolet lamp first photolysis area is 0.7:1.

[0065] Example 6

[0066] The far-ultraviolet photolysis and oxidation coupled sewage treatment device used in this embodiment is the same as that in Example 1, except that no mud trap is provided.

[0067] Table 1 Comparison of sewage treatment effects of Examples 1-6

[0068] project Removal rate of amoxicillin in produced water (%) Example 1 98.2 Example 2 99.3 Example 3 96.6 Example 4 99.8 Example 5 97.2 Example 6 95.6

[0069] As can be seen from the above table, the sewage treatment device coupled with far-ultraviolet photolysis and oxidation provided by the present invention has a good treatment effect on sewage containing amoxicillin pollutants and can basically treat amoxicillin completely.

Claims

1. A sewage treatment device coupled with far-ultraviolet photolysis and oxidation, characterized in that: The treatment tank comprises a treatment tank body, one side of which is provided with a water inlet pipe and an oxidant pipe for inputting sewage and oxidant respectively, and an overflow weir is provided on the opposite side. The interior of the treatment tank body comprises a shallow clear area, a turbid area, a heavily turbid area and a mud hopper area from top to bottom; Several vertical far-ultraviolet lamps 1 are evenly arranged in the shallow clear area, and several rotatable photolysis components are evenly arranged in the turbid area and the severely turbid area. The photolysis component includes a central rotation axis and an upper photolysis part and a lower photolysis part on the central rotation axis. The upper photolysis part is located in the turbid area, and the lower photolysis part is located in the severely turbid area. The upper photolysis part includes several far-ultraviolet lamps 2 around the central rotation axis, and the lower photolysis part includes several horizontal far-ultraviolet lamps 3 around the central rotation axis. The far-ultraviolet lamps 1 and the photolysis components provide light sources for areas with different sludge contents in the treatment tank body, and are used to photolyze pollutants in the sewage. The plurality of far-ultraviolet lamps 2 of the upper photolysis section are evenly arranged around the outer side of the central rotation axis to form a circle, which is the upper photolysis center area; the ratio of the diameter of the upper photolysis center area to the diameter of the far-ultraviolet lamp 1 photolysis area is (0.5-1):1; The lower photolysis section is located in the middle of the severe turbidity zone and includes a horizontal support frame for placing the far-ultraviolet lamp three. The support frame includes a plurality of support rods two, which form a polygon on the outside of the central rotation axis. The vertices of the polygon formed by the support rods two form a circle, which is the lower photolysis center area. The ratio of its diameter to the diameter of the far-ultraviolet lamp one photolysis area is (0.8-1):

1.

2. The far-ultraviolet photolysis and oxidation coupled sewage treatment device according to claim 1, characterized in that: The height of the water inlet pipe corresponds to the height of the middle of the heavy turbidity area, and the sewage is input into the heavy turbidity area; the height of the oxidant pipe corresponds to the height of the middle of the shallow clear area, and the oxidant contacts the sewage in countercurrent to oxidize and treat the pollutants in the sewage; an outlet trough is provided on the outside of the overflow outlet weir, and the outlet trough is equipped with an outlet pipe for discharging the treated produced water.

3. The far-ultraviolet photolysis and oxidation coupled sewage treatment device according to claim 1, characterized in that: The oxidant is sodium percarbonate, which is an addition compound of hydrogen peroxide and sodium carbonate; The far-ultraviolet lamp 1, the far-ultraviolet lamp 2 and the far-ultraviolet lamp 3 are all excimer ultraviolet lamps that can emit light with a wavelength of 222 nm.

4. The far-ultraviolet photolysis and oxidation coupled sewage treatment device according to claim 1, characterized in that: The outer side of the far-ultraviolet lamp is covered with a quartz tube. The bottom of the quartz tube is closed and the top is open for installing the far-ultraviolet lamp. The wire passes through the opening and is then connected to the power supply outside the treatment tank. Several far-ultraviolet lamps are evenly distributed in the shallow clear area in a matrix shape, the bottom of the quartz tube and the far-ultraviolet lamp are at the bottom of the shallow clear area, the top of the quartz tube passes through the water surface of the treatment tank, and the height ratio of the far-ultraviolet lamp to the shallow clear area is (0.6-0.8):

1.

5. The far-ultraviolet photolysis and oxidation coupled sewage treatment device according to claim 4, characterized in that: An annular cleaning brush is provided on the outside of the quartz tube 1, and the inner wall of the annular cleaning brush is evenly and densely covered with bristles. The bristles protrude toward the inside of the annular cleaning brush and can contact the outer wall of the quartz tube 1. The annular cleaning brush is connected to the telescopic end of the external hydraulic mechanism through at least two vertical straight rods. The hydraulic mechanism is arranged above the treatment tank body. The two straight rods are symmetrically arranged, which can drive the annular cleaning brush to move up and down along the quartz tube 1, so that the bristles clean the pollutants and sludge attached to the outer wall of the quartz tube 1.

6. The far-ultraviolet photolysis and oxidation coupled sewage treatment device according to claim 1, characterized in that: The central rotating shaft of the photolysis component is arranged vertically, and the top of the central rotating shaft passes through the liquid surface of the shallow clear area, and is then connected to an external motor. The motor drives the upper photolysis part and the lower photolysis part to rotate through the central rotating shaft; the central rotating shaft is arranged at the center of the area between the four far-ultraviolet lamps, and the circular area where the four far-ultraviolet lamps are located is the far-ultraviolet lamp one photolysis area.

7. The far-ultraviolet photolysis and oxidation coupled sewage treatment device according to claim 6, characterized in that: The far-ultraviolet lamp is vertically arranged and covered with a quartz tube on the outside. The upper and lower ends of the quartz tube are sealed by waterproof covers. The upper and lower waterproof covers are respectively connected to the central rotating shaft through a connecting rod. The height of the far-ultraviolet lamp is equal to the height of the turbidity zone. The number of far ultraviolet lamps 2 in the upper photolysis section is 4-8.

8. The far-ultraviolet photolysis and oxidation coupled sewage treatment device according to claim 7, characterized in that: The support frame includes a plurality of support rods 1, one end of the support rod 1 is connected to the bottom of the central rotating shaft, and the other end extends in a direction away from the central rotating shaft. With the central rotating shaft as the center of the circle, the plurality of support rods 1 are evenly distributed along the circumference of the central rotating shaft in a radial shape, and a support rod 2 is connected between the ends of two support rods 1 away from the central rotating shaft; The far ultraviolet lamp three is fixed on the upper surface and the lower surface of the support rod one and the support rod two to provide light source for the heavily turbid area.

9. The far-ultraviolet photolysis and oxidation coupled sewage treatment device according to claim 8, characterized in that: A mud catching net is provided below the support frame. The mud catching net includes an upper circular frame portion and a lower conical portion. The top of the circular frame portion is connected to the second support rod. The circular frame portion is provided with a hollow cylindrical frame. The diameter of the frame is equal to the diameter of the lower photolysis center area. The outer side of the frame is covered with a mesh. An openable and closable mud-catching door is provided on the side of the circular frame, so that the sludge in the heavily turbid area can enter the mud-catching net through the mud-catching door; the conical part is a net bag that is larger at the top and smaller at the bottom. The bottom of the mud-catching net is open and corresponds to a mud bucket, into which the sludge captured by the mud-catching net is discharged.

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