A device and method for oxidative degradation of typical PPCPs organic matter in sewage

Abstract

The present invention relates to a device and method for the oxidative degradation of typical PPCPs in sewage, belonging to the field of sewage treatment technology. The device includes a treatment tank, a filter assembly disposed within the treatment tank, a lamp treatment assembly disposed above the filter assembly, the filter assembly and the lamp treatment assembly being connected via a pumping assembly, the lamp treatment assembly comprising a water guide tray and an ultraviolet lamp tray, the water guide tray being used to guide water flow from the inside to the outside during rotation, and the ultraviolet lamp tray being used to perform ultraviolet lamp treatment on the water flow on the water guide tray. The present invention provides a device and method for the oxidative degradation of typical PPCPs in sewage, which circulates sewage mixed with a photo-Fenton catalyst within the device, continuously filters and lamp-treats the sewage during the circulation process, and fully oxidizes and degrades the typical PPCPs in the sewage.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment, and in particular relates to a device and method for oxidative degradation of typical PPCPs organic matter in sewage. Background Art

[0002] PPCPs refer to the residues of pharmaceuticals and personal care products in water, specifically including human and veterinary drugs and other chemical consumer products such as cosmetics and musk. They also include additives and inert ingredients used in the production and processing of drugs and care products. The currently widely used method for removing PPCPs from wastewater is oxidative degradation. The Fenton reaction system is a widely recognized oxidative degradation technology for PPCPs. Its principle is to use the hydroxyl radicals generated in the reaction to oxidize and decompose pollutants in water. However, the traditional Fenton reaction system has problems such as harsh reaction conditions, difficulty in recovering trivalent iron ions, and low hydrogen peroxide utilization efficiency. To address this issue, the photo-Fenton reaction system has emerged. Through the combined action of ultraviolet light irradiation and hydrogen peroxide, the trivalent iron ions in the Fenton reaction system can be reduced to divalent iron ions, while simultaneously producing hydroxyl radicals. Compared with the traditional Fenton system, it can effectively reduce the amount of catalyst used and the amount of sludge produced, and significantly enhance the oxidative degradation effect.

[0003] However, when oxidative degradation of PPCPs in sewage is carried out based on a photo-Fenton reaction system, the sewage needs to be fully treated with ultraviolet lamps. However, the penetration rate of ultraviolet light in sewage is poor. Therefore, simply setting up an ultraviolet lamp step on the sewage transmission path cannot avoid the problems of uniform and insufficient lighting effect on the sewage. The effect of the photo-Fenton reaction system cannot be fully exerted, and sludge will continue to be generated during the oxidation and degradation of sewage. The sludge is mixed in the sewage and participates in the oxidation and degradation process throughout the process, which will also affect the treatment effect. In response to the above problems, the present invention proposes an oxidative degradation device and method for typical PPCPs in sewage. Summary of the Invention

[0004] The purpose of the present invention is to provide an oxidative degradation device and method for typical PPCPs organic matter in sewage in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] The present invention provides an oxidative degradation device for typical PPCPs organic matter in sewage, comprising a treatment tank, a filter assembly provided in the treatment tank, a light treatment assembly provided above the filter assembly, and the filter assembly and the light treatment assembly being connected via a pumping assembly;

[0007] The pumping assembly includes a pumping pipe and a hydraulic screw arranged in the pumping pipe. The hydraulic screw is fixed to the lighting treatment assembly above. The pumping pipe cooperates with the pumping pump to input the sewage filtered by the filtering assembly into the lighting treatment assembly. The hydraulic screw is used to drive the lighting treatment assembly to rotate with the help of water flow.

[0008] The lighting treatment component includes a water guide plate and an ultraviolet lamp plate. The water guide plate is used to guide water flow from the inside to the outside during rotation, and the ultraviolet lamp plate is used to perform ultraviolet lighting treatment on the water flow on the water guide plate.

[0009] As a further optimization scheme of the present invention, the lighting treatment component also includes a water supply pipe rotatably connected to the water pumping pipe, and two assembly plates are provided on the outer side of the water supply pipe. There are several water diversion trays and ultraviolet lamp trays. All water diversion trays are located between the two assembly plates and are evenly distributed vertically. An ultraviolet lamp tray is provided between any two adjacent water diversion trays, and the pipe wall of the water supply pipe located on the inner side of the water diversion tray is replaced with a permeable net.

[0010] As a further optimized solution of the present invention, the ultraviolet lamp panel includes a shielding cover in an annular structure and a lamp tube in a spiral structure disposed in the shielding cover.

[0011] As a further optimization scheme of the present invention, a number of water diversion grooves and light grooves distributed in a circular array are opened in the water diversion tray, and light grooves are provided on both sides of each water diversion groove. All water diversion grooves are distributed radially, and the water diversion grooves are a multi-level forked structure from the inside to the outside.

[0012] As a further optimization scheme of the present invention, a water inlet pipe group is provided on the inner side of the treatment tank and is located above the lighting treatment component. The water inlet pipe group includes a chemical pipe and a wastewater pipe. The chemical pipe and the wastewater pipe are both annular in structure and concentrically distributed. A number of liquid outlet pipes distributed in a circular array are provided between the chemical pipe and the wastewater pipe. A water outlet is provided at the bottom of the liquid outlet pipe. Both the chemical pipe and the wastewater pipe are provided with input pipes for external supply sources.

[0013] As a further optimization scheme of the present invention, the water guide plate is rotatably connected to the adjacent shielding cover, and each shielding cover is fixed to the treatment tank through several support blocks distributed in a circular array on the outside. The support blocks are in an inverted V-shaped structure and all the support blocks are staggered in space.

[0014] As a further optimization scheme of the present invention, the filter assembly includes a filter cover, a partition cover arranged on the inner side of the filter cover, and a sealing plate. The filter cover, the partition cover and the sealing plate cooperate to form a water cavity located between the filter cover and the partition cover. The water suction pipe is located on the inner side of the partition cover and is connected to the water cavity.

[0015] As a further optimization solution of the present invention, a waste discharge pipe is provided at the bottom of the treatment tank, and an inlet and outlet pipe passing through the treatment tank is provided below the filter assembly.

[0016] A method for oxidative degradation of typical PPCPs organic matter in sewage is implemented using an oxidative degradation device for typical PPCPs organic matter in sewage, and the specific steps include:

[0017] S1. Based on the principle of photo-Fenton oxidation, an appropriate amount of sewage and photo-Fenton catalyst are injected into the treatment tank, followed by sufficient static reaction;

[0018] S2. Turn on the pumping assembly and the lighting treatment assembly. The sewage in the filter tank passes through the filter assembly and the lighting treatment assembly in sequence, then overflows from the outside of the water diversion tray and falls back into the treatment tank. The sewage circulates along the above path in the device;

[0019] S3. After the sewage has fully circulated in the device, close the pumping assembly, open the control valves on the inlet and outlet pipes, and output the treated sewage;

[0020] S4. Turn off the lighting treatment component, then open the control valve on the waste pipe to output the waste generated during the treatment process, input water into the filter component through the inlet and outlet pipes and flush the treatment tank to clean the device, and finally close the control valve on the waste pipe to proceed to the next round of sewage treatment.

[0021] The beneficial effects of the present invention are:

[0022] 1. The oxidative degradation device for typical PPCPs organic matter in sewage achieves the effect of circulating sewage mixed with a photo-Fenton catalyst through the cooperation of a treatment tank, a filtering component, a pumping component, and a lighting treatment component, and is convenient for controlling the treatment time according to the concentration of PPCPs organic matter in the sewage. In addition, during the circulation of sewage, on the one hand, the filtering component can continuously filter the sewage so that the sludge generated during the oxidative degradation process does not enter the circulation path. On the other hand, the water diversion tray cooperates with the ultraviolet lamp tray to achieve the effect of diverting the sewage for sufficient lighting treatment. In summary, the oxidative degradation device and method for typical PPCPs organic matter in sewage solve the problems raised in the background technology, can give full play to the advantages of the photo-Fenton reaction system, and achieve the effect of efficient oxidative degradation of typical PPCPs organic matter in sewage.

[0023] 2. Through the coordination of the lighting treatment component, the water pumping pipe and the hydraulic screw, the lighting treatment component is driven by water flow, and the centrifugal force generated by the rotation of the water diversion plate is used to transport sewage. This is not only beneficial to energy saving, but also the speed of each sewage treatment link can be coordinated, which is convenient for controlling the circulation flow rate and reaction time of the sewage.

[0024] 3. Through the coordination of the treatment tank, waste pipe, filter cover, separation cover and inlet and outlet pipes, after the sewage treatment is completed, the device can be cleaned by backflushing the filter cover and flushing the inner cavity of the treatment tank, which is convenient for maintenance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall appearance of the present invention;

[0026] Figure 2 It is a schematic diagram of the splitting of the present invention;

[0027] Figure 3 This is a schematic diagram of the water inlet pipe group;

[0028] Figure 4 This is a schematic diagram of the separation of the lighting processing component and the filtering component;

[0029] Figure 5 is a cross-sectional view of the filter assembly;

[0030] Figure 6 This is a schematic diagram of the assembly plate, water guide plate and UV lamp panel;

[0031] Figure 7 This is a schematic diagram of the coordination of the water supply pipe, permeable net, water extraction pipe and hydraulic screw;

[0032] Figure 8 This is a schematic diagram of the coordination between the permeable net and the water diversion tray;

[0033] Figure 9 This is a schematic diagram of the distribution of water diversion troughs and light troughs;

[0034] Figure 10 It is a schematic diagram of the UV lamp panel.

[0035] In the figure: 1. Treatment tank; 2. Filter assembly; 201. Filter cover; 202. Separation cover; 203. Sealing plate; 204. Water chamber; 3. Light treatment assembly; 301. Assembly plate; 302. Water diversion plate; 3021. Water diversion trough; 3022. Light trough; 303. UV lamp panel; 3031. Shielding cover; 3032. Lamp tube; 304. Water supply pipe; 305. Permeable net; 4. Pumping assembly; 401. Pumping pipe; 402. Hydraulic screw; 5. Water inlet pipe; 501. Chemical pipe; 502. Wastewater pipe; 503. Liquid outlet pipe; 6. Waste discharge pipe; 7. Inlet and outlet pipes; 8. Support block. DETAILED DESCRIPTION

[0036] The present application is described in further detail below. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0037] Example 1

[0038] like Figure 1-10As shown, the oxidative degradation device for typical PPCPs organic matter in sewage of this embodiment includes a treatment tank 1, a filter assembly 2 is provided in the treatment tank 1, a light treatment assembly 3 is provided above the filter assembly 2, and the filter assembly 2 and the light treatment assembly 3 are connected through a pumping assembly 4;

[0039] The pumping assembly 4 includes a pumping pipe 401 and a hydraulic screw 402 disposed in the pumping pipe 401. The hydraulic screw 402 is fixed to the upper lighting treatment assembly 3. The pumping pipe 401 cooperates with the pumping pump to input the sewage filtered by the filter assembly 2 into the lighting treatment assembly 3. The hydraulic screw 402 is used to drive the lighting treatment assembly 3 to rotate by means of water flow.

[0040] The lighting treatment component 3 includes a water guide tray 302 and an ultraviolet lamp tray 303. The water guide tray 302 is used to guide the water flow from the inside to the outside during the rotation process, and the ultraviolet lamp tray 303 is used to perform ultraviolet lighting treatment on the water flow on the water guide tray 302.

[0041] A waste discharge pipe 6 is provided at the bottom of the treatment tank 1 , and an inlet and outlet pipe 7 is provided below the filter assembly 2 , which is in communication with the filter assembly 2 and passes through the treatment tank 1 .

[0042] The illumination treatment assembly 3 also includes a water supply pipe 304 rotatably connected to the water pump 401. Two assembly plates 301 are sleeved on the outside of the water supply pipe 304. There are multiple water guide trays 302 and UV lamp trays 303. All water guide trays 302 are located between the two assembly plates 301 and are evenly distributed vertically. A UV lamp tray 303 is located between any two adjacent water guide trays 302. The wall of the water supply pipe 304 located inside the water guide trays 302 is replaced with a permeable mesh 305.

[0043] The sewage inside the lamp treatment assembly 3 flows into the water guide tray 302 through the permeable net 305. The water guide tray 302 and the ultraviolet lamp tray 303 are stacked and work at the same time, which can fully utilize the ultraviolet light and improve the treatment efficiency.

[0044] The ultraviolet lamp panel 303 includes a shielding cover 3031 in an annular structure and a lamp tube 3032 in a spiral structure disposed in the shielding cover 3031 , so that the ultraviolet light can evenly cover the water guide tray 302 .

[0045] The water diversion tray 302 is provided with a number of water diversion grooves 3021 and light grooves 3022 distributed in a circular array, and each water diversion groove 3021 is provided with a light groove 3022 on both sides. All the water diversion grooves 3021 are distributed radially, and the water diversion grooves 3021 are multi-stage bifurcated structures from the inside to the outside. The water diversion tray 302 body is made of ultraviolet light-transmissive material. When sewage flows in the water diversion groove 3021, it can be diverted step by step and surrounded by ultraviolet light. The restoration effect achieved by ultraviolet lamp treatment is better.

[0046] The filter assembly 2 includes a filter cover 201, a partition cover 202 arranged on the inner side of the filter cover 201, and a sealing plate 203. The filter cover 201, the partition cover 202 and the sealing plate 203 cooperate to form a water cavity 204 located between the filter cover 201 and the partition cover 202. The water suction pipe 401 is located on the inner side of the partition cover 202 and is connected to the water cavity 204. The inlet and outlet pipes 7 are also connected to the water cavity 204.

[0047] The water cavity 204 formed by the filter cover 201 and the separator cover 202 is narrow. When the filter cover 201 is backflushed, the water flow input through the inlet and outlet pipes 7 can quickly fill the water cavity 204, thereby achieving the effect of quickly and comprehensively flushing the filter cover 201.

[0048] The oxidative degradation method of typical PPCPs organic matter in sewage based on this device has the following specific steps and effects:

[0049] S1. Based on the principle of photo-Fenton oxidation, the corresponding photo-Fenton catalyst is selected according to the type and concentration of PPCPs in the wastewater, and the ratio of wastewater to photo-Fenton catalyst is determined. The wastewater and photo-Fenton catalyst are then introduced into treatment tank 1 and allowed to fully react. The precipitate gradually generated during the reaction is isolated outside the filter assembly 2 and concentrated at the bottom of treatment tank 1.

[0050] S2. Turn on the pumping assembly 4 and the lamp treatment assembly 3. The pumping assembly 4 first pumps the sewage that has passed through the filter assembly 2 upward to the inner side of the lamp treatment assembly 3. During this process, the hydraulic screw 402 rotates under the drive of the water flow, thereby driving the lamp treatment assembly 3 to rotate. The water flow transported to the lamp treatment assembly 3 can flow outward along the water guide plate 302 under the action of centrifugal force, and finally overflow from the outer edge of the water guide plate 302 and fall back into the treatment tank 1. When the water flow passes through the water guide plate 302, the ultraviolet light emitted by the ultraviolet lamp plate 303 can perform lamp treatment on the water flow. The sewage circulates along the above-mentioned path in the device, which not only allows the photo-Fenton agent and sewage to fully react, but also allows the mixture of the two to be fully treated by ultraviolet light to enhance the oxidative degradation effect.

[0051] S3. After the sewage has fully circulated in the device, the pumping assembly 4 is closed and the control valve on the inlet and outlet pipes 7 is opened. The treated sewage is directly discharged along the inlet and outlet pipes 7, and the sediment remains in the treatment tank 1.

[0052] S4. Turn off the lighting treatment component 3, then open the control valve on the waste pipe 6. Most of the sediment in the treatment tank 1 can be directly discharged through the waste pipe 6. Then, water flow is input into the filter component 2 through the inlet and outlet pipes 7 to achieve the effect of backwashing the filter component 2. Finally, the treatment tank 1 is flushed from above, and finally the control valve on the waste pipe 6 is closed to carry out the next round of sewage treatment.

[0053] Example 2

[0054] On the basis of Example 1, a water inlet pipe group 5 is provided on the inner side of the treatment tank 1 and the water inlet pipe group 5 is located above the lighting treatment component 3. The water inlet pipe group 5 includes a chemical pipe 501 and a wastewater pipe 502. The chemical pipe 501 and the wastewater pipe 502 are both annular in structure and concentrically distributed. A plurality of liquid outlet pipes 503 distributed in an annular array are provided between the chemical pipe 501 and the wastewater pipe 502. A water outlet is provided at the bottom of the liquid outlet pipe 503. Both the chemical pipe 501 and the wastewater pipe 502 are provided with an input pipe for an external supply source. The size of the chemical pipe 501 is smaller than that of the wastewater pipe 502 to accommodate the volume difference between the photo-Fenton catalyst and the sewage. The liquid outlet pipe 503 can be designed into a matching conical pipe structure. Then, the sewage and the photo-Fenton catalyst are mixed when they exit through the liquid outlet pipe 503. The input method is convenient and efficient, and is conducive to the full reaction of the sewage and the photo-Fenton catalyst.

[0055] The water guide plate 302 is rotatably connected to the adjacent shielding cover 3031. Each shielding cover 3031 is fixed to the treatment tank 1 through several support blocks 8 distributed in a circular array on the outside. The support blocks 8 are in an inverted V-shaped structure and all the support blocks 8 are staggered in space. In this embodiment, the hydraulic screw 402 can drive the assembly plate 301, the water guide plate 302, the water supply pipe 304 and the permeable net 305 in the lighting treatment component 3 to rotate as a whole under the drive of water flow. The water flow can be further mixed when passing through the staggered support blocks 8, which is also conducive to the full reaction of sewage and photo-Fenton catalyst.

[0056] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A device for oxidative degradation of typical PPCPs organic matter in sewage, comprising a treatment tank (1), characterized in that: A filter assembly (2) is provided in the treatment tank (1), a lighting treatment assembly (3) is provided above the filter assembly (2), and the filter assembly (2) and the lighting treatment assembly (3) are connected via a pumping assembly (4); The pumping assembly (4) comprises a pumping pipe (401) and a hydraulic screw (402) disposed in the pumping pipe (401); the hydraulic screw (402) is fixed to the lighting treatment assembly (3) above; the pumping pipe (401) cooperates with the pumping pump to input the sewage filtered by the filtering assembly (2) into the lighting treatment assembly (3); the hydraulic screw (402) is used to drive the lighting treatment assembly (3) to rotate by means of water flow; The lighting treatment component (3) comprises a water guide plate (302) and an ultraviolet lamp plate (303), wherein the water guide plate (302) is used to guide water flow from the inside to the outside during rotation, and the ultraviolet lamp plate (303) is used to perform ultraviolet lighting treatment on the water flow on the water guide plate (302); The ultraviolet lamp panel (303) comprises a shielding cover (3031) in an annular structure and a lamp tube (3032) in a spiral structure and arranged in the shielding cover (3031); The water diversion plate (302) is provided with a plurality of water diversion grooves (3021) and light grooves (3022) distributed in a circular array, and each water diversion groove (3021) is provided with light grooves (3022) on both sides. All the water diversion grooves (3021) are distributed radially, and the water diversion grooves (3021) are in a multi-stage bifurcated structure from the inside to the outside. The filter assembly (2) comprises a filter cover (201), a partition cover (202) arranged inside the filter cover (201), and a sealing plate (203); the filter cover (201), the partition cover (202), and the sealing plate (203) cooperate to form a water cavity (204) located between the filter cover (201) and the partition cover (202); the water extraction pipe (401) is located inside the partition cover (202) and communicates with the water cavity (204).

2. The oxidative degradation device for typical PPCPs organic matter in sewage according to claim 1, characterized in that: The lighting treatment assembly (3) further comprises a water supply pipe (304) rotatably connected to the water pumping pipe (401); two assembly plates (301) are sleeved on the outer side of the water supply pipe (304); the water guide trays (302) and the ultraviolet lamp trays (303) each comprise a plurality of water guide trays (302); all the water guide trays (302) are located between the two assembly plates (301) and are evenly distributed vertically; an ultraviolet lamp tray (303) is provided between any two adjacent water guide trays (302); and the pipe wall of the water supply pipe (304) located inside the water guide trays (302) is replaced with a water-permeable net (305).

3. The oxidative degradation device for typical PPCPs organic matter in sewage according to claim 1, characterized in that: A water inlet pipe group (5) is provided on the inner side of the treatment tank (1) and is located above the lighting treatment component (3). The water inlet pipe group (5) comprises a chemical pipe (501) and a wastewater pipe (502). The chemical pipe (501) and the wastewater pipe (502) are both annular in structure and concentrically distributed. A plurality of liquid outlet pipes (503) distributed in an annular array are provided between the chemical pipe (501) and the wastewater pipe (502). A water outlet is provided at the bottom of the liquid outlet pipe (503). Both the chemical pipe (501) and the wastewater pipe (502) are provided with an input pipe for connecting to an external supply source.

4. The oxidative degradation device for typical PPCPs organic matter in sewage according to claim 1, characterized in that: The water guide plate (302) is rotatably connected to an adjacent shielding cover (3031), and each shielding cover (3031) is fixed to the processing tank (1) via a plurality of support blocks (8) distributed in a circular array on the outside, wherein the support blocks (8) are in an inverted V-shaped structure and all the support blocks (8) are staggeredly distributed in space.

5. The oxidative degradation device for typical PPCPs organic matter in sewage according to any one of claims 1 to 4, characterized in that: A waste discharge pipe (6) is provided at the bottom of the treatment tank (1), and an inlet and outlet pipe (7) that passes through the treatment tank (1) is provided below the filter assembly (2).

6. A method for oxidative degradation of typical PPCPs in sewage, which is implemented using the oxidative degradation device for typical PPCPs in sewage as claimed in claim 5, comprising the following steps: S1. Based on the principle of photo-Fenton oxidation, a suitable amount of sewage and photo-Fenton catalyst is injected into the treatment tank (1), followed by a sufficient static reaction; S2, turning on the pumping assembly (4) and the lighting treatment assembly (3), the sewage in the filter tank (1) passes through the filter assembly (2) and the lighting treatment assembly (3) in sequence, then overflows from the outside of the water guide plate (302) and falls back into the treatment tank (1), and the sewage circulates along the above-mentioned path in the device; S3. After the sewage has fully circulated in the device, the pumping assembly (4) is closed, and the control valves on the inlet and outlet pipes (7) are opened to output the treated sewage; S4, close the lighting treatment component (3), then open the control valve on the waste pipe (6), output the waste generated during the treatment process, input water flow into the filter component (2) through the inlet and outlet pipes (7) and flush the treatment tank (1) to clean the device, and finally close the control valve on the waste pipe (6).

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