Treatment system for high-concentration formaldehyde sewage

Abstract

The invention discloses a treatment system for high-concentration formaldehyde sewage, and relates to the technical field of sewage treatment. The device comprises a secondary treatment pond, a filter is arranged at the top of the secondary treatment pond, two groups of primary treatment ponds are arranged at the top of the filter, the primary treatment ponds and the secondary treatment ponds have the same bottom area, and the depth of the secondary treatment ponds is twice that of the primary treatment ponds. Ultraviolet catalysis components are arranged in the primary treatment tank and the secondary treatment tank, the inclination angle of the ultraviolet catalysis component in the primary treatment tank is 0-30 degrees, and the inclination angle of the ultraviolet catalysis component in the secondary treatment tank is 60-90 degrees. According to the invention, the series-connected multi-stage ultraviolet light-hydrogen peroxide system is utilized, energy consumption can be controlled by stages in a plurality of reaction stages, excessive energy consumption in a single reaction stage is avoided, and meanwhile, in the process from the upper stage to the lower stage, byproducts in sewage are adsorbed and filtered by utilizing the filter, so that the subsequent treatment efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a treatment system for high-concentration formaldehyde sewage. Background Art

[0002] Formaldehyde is a highly toxic substance that causes severe pollution to water, soil, and air. Formaldehyde is highly soluble in water and has strong carcinogenic, mutagenic, and teratogenic effects. If left untreated, the direct discharge of formaldehyde-containing wastewater not only pollutes water sources but also has long-term negative impacts on aquatic life and the ecological environment. Therefore, the treatment of formaldehyde-containing wastewater has become a critical task in industrial wastewater management.

[0003] Ultraviolet light-hydrogen peroxide combined technology is a treatment technology commonly used to treat high-concentration formaldehyde wastewater. It is a strong oxidation treatment technology that mainly promotes the decomposition of hydrogen peroxide through ultraviolet light irradiation to produce a large number of hydroxyl free radicals. These free radicals have extremely strong oxidizing ability. The free radicals can quickly attack formaldehyde molecules, break their chemical bonds, degrade formaldehyde into carbon dioxide and water, and completely remove formaldehyde.

[0004] At the same time, the UV-hydrogen peroxide combination technology can selectively degrade organic pollutants in water without generating excessive harmful byproducts. Therefore, during the formaldehyde wastewater treatment process, it can ensure that lower concentrations of organic pollutants enter the biological treatment system.

[0005] A Chinese patent (publication number: CN117049688B) discloses an ultraviolet catalytic advanced oxidation wastewater treatment device, comprising: a shell, an impeller seat, a lamp seat, an impeller, an injection pipe, an ultraviolet lamp, a cleaning disk, a motor, and a screw; the shell has a water inlet end and a water outlet end, a water inlet hole is provided at the edge of the water inlet end, and a water outlet hole is provided at the water outlet end; the impeller seat is provided at the water inlet end, and the lamp seat is provided at the water outlet end; the impeller is rotatably mounted on the impeller seat, and the impeller can slide on the impeller seat; two centrally symmetrical injection pipes are installed on the side of the impeller away from the water inlet end, and an oxide injection flow channel connecting the outside of the shell and the injection pipe is provided inside the impeller seat and the impeller; a correction mechanism is also provided, and the correction mechanism is used to position the impeller to at least one fixed position so that the injection pipe passes through the cleaning disk.

[0006] This patent and the prior art have the following technical problems in actual use: 1. Existing technologies all directly treat wastewater using a combination of UV light and hydrogen peroxide. However, when treating wastewater with high formaldehyde concentrations, this technology requires the use of UV lamps to generate UV light and relies on the chemical reaction of hydrogen peroxide. When the formaldehyde concentration is too high, the penetration of UV light is limited, resulting in reduced reaction efficiency and long reaction times. Longer UV exposure times and higher hydrogen peroxide concentrations further increase energy consumption. Furthermore, during the one-time treatment process, residual hydrogen peroxide and a large number of byproducts are likely to occur, affecting subsequent wastewater treatment.

[0007] 2. The ultraviolet lamp tube and hydrogen peroxide injection tube in the existing technology are fixedly set. When treating sewage with different concentrations, it is necessary to adjust the ultraviolet lamp power and the hydrogen peroxide injection amount respectively. The adjustment is difficult, and the single treatment amount is fixed. When the concentration is low, it is easy to cause waste of ultraviolet lamp tubes. When the concentration is high, the amount is too large and the treatment is incomplete, and the treatment efficiency is low. Summary of the Invention

[0008] The purpose of the present invention is to solve the above problems and provide a treatment system for high-concentration formaldehyde wastewater.

[0009] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: A high-concentration formaldehyde wastewater treatment system includes a secondary treatment tank, a filter is provided on the top of the secondary treatment tank, and two sets of primary treatment tanks are provided on the top of the filter. The primary treatment tank and the secondary treatment tank have the same bottom area, and the depth of the secondary treatment tank is twice that of the primary treatment tank. Ultraviolet catalytic components are provided inside the primary treatment tank and the secondary treatment tank. The ultraviolet catalytic components can be raised and lowered, and the tilt angle is adjustable. The tilt angle of the ultraviolet catalytic component in the primary treatment tank is 0-30 degrees, and the tilt angle of the ultraviolet catalytic component in the secondary treatment tank is 60-90 degrees. The primary treatment tank is connected to the filter through a primary drain port, and a secondary drain port is provided at the bottom of the secondary treatment tank. A primary medicine box and a secondary medicine box are respectively provided on both sides of the secondary treatment pool. The primary medicine box can inject the hydrogen peroxide inside into the primary treatment pool through a primary medicine pump, and the secondary medicine box can inject the hydrogen peroxide inside into the secondary treatment pool through a secondary medicine pump.

[0010] Furthermore, the inner walls of the primary treatment tank and the secondary treatment tank are fixedly installed with lifting cylinders, and the telescopic ends of the lifting cylinders are fixedly installed with lifting rods. The ultraviolet catalytic component includes a lamp frame rotatably installed on the lifting rod, and multiple groups of lamp tubes are arranged side by side inside the lamp frame. The rotation center of the lamp frame is fixedly installed with an angle adjustment wheel, and a transmission wheel 1 is rotatably installed on the outer side of the lifting rod, and the transmission wheel 1 is engaged with the angle adjustment wheel. A transmission wheel 2 is fixedly installed on the outer side of the transmission wheel 1. The inner walls of the primary treatment tank and the secondary treatment tank are fixedly installed with a transmission rack, and the transmission wheel 2 is engaged with the transmission rack. The radii of the transmission wheel 2 and the angle adjustment wheel are both larger than those of the transmission wheel 1.

[0011] Furthermore, multiple groups of drug tubes are fixedly installed on the bottom of the lamp frame, and the multiple groups of drug tubes are cross-distributed with the multiple groups of lamp tubes. The outlets of the drug tubes are close to the top of the lamp frame. The drug tubes in the primary treatment pool are connected to the primary drug pump, and the drug tubes in the secondary treatment pool are connected to the secondary drug pump.

[0012] Furthermore, an adjusting weight sleeve is sleeved on the outer side of the lamp tube, and adjacent adjusting weight sleeves are fixedly connected by a connecting plate. An electromagnetic valve is provided inside the connecting plate, and the medicine tube is connected to the electromagnetic valve.

[0013] Furthermore, the adjusting weight sleeve consists of an outer tungsten ring and an inner cleaning ring, and the inner cleaning ring is made of polytetrafluoroethylene.

[0014] Furthermore, multiple groups of medicine tubes are fixedly installed with tube clamp rods, the top of the lamp frame is fixedly installed with an electromagnetic rod, a suction plate is adsorbed on the electromagnetic rod, and multiple groups of tube clamp rods are fixedly connected to the suction plate at the same time.

[0015] Furthermore, the electromagnetic rod consists of a polytetrafluoroethylene outer shell and an electromagnetic inner core.

[0016] Furthermore, the portion of the medicine tube located between the tube clamp rod and the connecting plate is provided with an adjusting head, and an inner elastic strip skeleton is provided inside the adjusting head.

[0017] Furthermore, adjustment sleeves are provided at both ends of the lamp tube.

[0018] The beneficial effects of the present invention are as follows: 1. The present invention utilizes a multi-stage UV-hydrogen peroxide system connected in series, which can control energy consumption in multiple reaction stages in stages, avoiding excessive energy consumption in a single reaction stage. At the same time, in the process from the upper stage to the lower stage, the by-products in the sewage are adsorbed and filtered by the filter, thereby improving the efficiency of subsequent treatment.

[0019] 2. The present invention controls the amount of sewage by taking sewage submerging the ultraviolet catalytic component as the standard. When the sewage concentration is high, the ultraviolet catalytic component descends and the inclination angle decreases, and the single sewage volume decreases. When the sewage concentration is low, the ultraviolet catalytic component rises and the inclination angle increases, and the single sewage volume increases. It can make full use of the light to achieve the best treatment effect and high treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the structure of the ultraviolet catalytic component of the present invention Figure 1 ; Figure 4 This is a schematic diagram of the structure of the ultraviolet catalytic component of the present invention Figure 2 ; Figure 5 It is a schematic diagram of the lamp structure of the present invention.

[0021] Figure numerals: 1. Secondary treatment tank; 11. Secondary drain outlet; 2. Primary treatment tank; 21. Primary drain outlet; 3. Primary medicine box; 31. Primary medicine pump; 4. Secondary medicine box; 41. Secondary medicine pump; 5. Filter; 6. Ultraviolet catalytic component; 61. Lamp frame; 62. Lamp tube; 621. Adjustment sleeve; 63. Medicine tube; 631. Adjustment head; 632. Inner elastic bar skeleton; 64. Adjustment weight sleeve; 65. Pipe clamp rod; 66. Suction plate; 67. Electromagnetic rod; 68. Connecting plate; 69. Electromagnetic valve; 7. Lifting cylinder; 8. Lifting rod; 81. Angle adjustment wheel; 82. Transmission wheel one; 83. Transmission wheel two; 9. Transmission rack. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] Example 1, as Figure 1-Figure 5As shown, a high-concentration formaldehyde wastewater treatment system includes a secondary treatment tank 1, a filter 5 is provided on the top of the secondary treatment tank 1, and two groups of primary treatment tanks 2 are provided on the top of the filter 5. The primary treatment tank 2 and the secondary treatment tank 1 have the same bottom area, and the depth of the secondary treatment tank 1 is twice that of the primary treatment tank 2. An ultraviolet catalytic component 6 is provided inside both the primary treatment tank 2 and the secondary treatment tank 1. The ultraviolet catalytic component 6 can be raised and lowered, and the inclination angle is adjustable. The inclination angle of the ultraviolet catalytic component 6 in the primary treatment tank 2 is 0-30°, and the inclination angle of the ultraviolet catalytic component 6 in the secondary treatment tank 1 is 60-90°. The primary treatment tank 2 is connected to the filter 5 through a primary drain port 21, and a secondary drain port 11 is provided at the bottom of the secondary treatment tank 1. A primary medicine box 3 and a secondary medicine box 4 are respectively provided on both sides of the secondary treatment tank 1. The primary medicine box 3 can inject the hydrogen peroxide inside into the primary treatment tank 2 through the primary medicine pump 31, and the secondary medicine box 4 can inject the hydrogen peroxide inside into the secondary treatment tank 1 through the secondary medicine pump 41.

[0024] The UV catalytic assembly 6 in the primary treatment tank 2 of the present invention is tilted at an angle of 0-30°, nearly horizontally. When the formaldehyde concentration in wastewater is high, this horizontal arrangement increases the UV light's path through the wastewater, maximizing UV penetration. This increased irradiation area also prolongs the contact time between the UV light and pollutants in the water, helping to improve reaction efficiency.

[0025] The inclination angle of the ultraviolet catalytic component 6 in the secondary treatment tank 1 is 60-90°, which is close to a vertical arrangement. When the sewage concentration is low, the ultraviolet light has a strong penetrating ability and the formaldehyde in the sewage is easier to decompose. In this case, the vertical arrangement can increase the ultraviolet treatment capacity.

[0026] The bottom area of ​​the primary treatment pool 2 is the same as that of the secondary treatment pool 1 , and the depth of the secondary treatment pool 1 is twice that of the primary treatment pool 2 .

[0027] Treatment process: High-concentration formaldehyde wastewater is added to the primary treatment tank 2, and the wastewater undergoes high-efficiency reaction treatment in the primary treatment tank 2, and the treatment volume is small, but the two groups of primary treatment tanks 2 are carried out simultaneously. After the primary treatment is completed, the wastewater enters the filter 5 through the primary drain outlet 21. The filter 5 of this embodiment adopts activated carbon filtration. After the primary stage, the formaldehyde concentration in the water has been greatly reduced, but there are still some difficult-to-degrade intermediate products, such as aldehydes, ketones or benzene substances. These residual harmful substances are removed by activated carbon adsorption to achieve the purpose of further purifying the water quality and reducing the impact of intermediate products on subsequent treatment. The filtered wastewater enters the secondary treatment tank 1 through the filter 5, and the wastewater in the two primary treatment tanks 2 enters the secondary treatment tank 1 at the same time. The ultraviolet catalytic component 6 arranged nearly vertically is used to increase the treatment volume, and the use of graded treatment can complete the efficient treatment of high-concentration formaldehyde wastewater.

[0028] When the sewage concentration is high, the ultraviolet catalytic component 6 descends and the tilt angle decreases, reducing the amount of sewage in a single pass and bringing the ultraviolet catalytic component 6 closer to horizontal. When the sewage concentration is low, the ultraviolet catalytic component 6 ascends and the tilt angle increases, increasing the amount of sewage in a single pass. This fully utilizes the light to achieve optimal treatment effects and high treatment efficiency. The ultraviolet catalytic components 6 in the primary treatment tank 2 and the secondary treatment tank 1 are synchronously adjusted so that the two can match each other. The present invention determines the amount of sewage added by submerging the ultraviolet catalytic component 6. Therefore, the sewage treatment amount can be accurately controlled according to the sewage concentration, achieving good treatment effects.

[0029] It should be noted that the present invention can also adopt secondary or higher level treatment, and the number of treatment pools increases exponentially from top to bottom, which can be customized according to customer needs.

[0030] Embodiment 2, on the basis of the above embodiment, further includes: the inner walls of the primary treatment tank 2 and the secondary treatment tank 1 are fixedly installed with a lifting cylinder 7, the telescopic end of the lifting cylinder 7 is fixedly installed with a lifting rod 8, the ultraviolet catalytic component 6 includes a lamp frame 61 rotatably installed on the lifting rod 8, a plurality of groups of lamp tubes 62 are arranged side by side inside the lamp frame 61, an angle adjustment wheel 81 is fixedly installed at the rotation center of the lamp frame 61, a transmission wheel 1 82 is rotatably installed on the outer side of the lifting rod 8, the transmission wheel 1 82 is engaged with the angle adjustment wheel 81, and a transmission wheel 2 83 is fixedly installed on the outer side of the transmission wheel 1 82, the inner walls of the primary treatment tank 2 and the secondary treatment tank 1 are fixedly installed with a transmission rack 9, the transmission wheel 2 83 is engaged with the transmission rack 9, and the radii of the transmission wheel 2 83 and the angle adjustment wheel 81 are both larger than the transmission wheel 1 82.

[0031] This embodiment provides a specific adjustment structure of the ultraviolet catalytic component 6. When the ultraviolet catalytic component 6 needs to be adjusted, the lifting cylinder 7 is controlled to operate, the lifting cylinder 7 drives the lifting rod 8 to move up and down, the lifting rod 8 drives the lamp frame 61 to move up and down, and the lamp frame 61 drives the multiple groups of lamp tubes 62 to move up and down. At the same time, the lifting rod 8 drives the transmission wheel 2 83 to move up and down relative to the transmission rack 9, and the transmission rack 9 causes the transmission wheel 2 83 to rotate, the transmission wheel 2 83 drives the transmission wheel 1 82 to rotate, the transmission wheel 1 82 drives the angle adjustment wheel 81 to rotate, and the angle adjustment wheel 81 drives the lamp frame 61 to rotate, and the lamp Frame 61 changes the inclination angle of the lamp tube 62. It should be noted that the radii of the transmission wheel 2 83 and the angle adjustment wheel 81 are both larger than the transmission wheel 1 82, so that the lifting height and the rotation angle can match each other, so that the distance between the lamp frame 61 and the bottom of the treatment pool remains unchanged. For example, the width of the treatment pool is 10m, and the width of the lamp frame 61 is 9m. When the lamp frame 61 rises 2.25m as a whole, the opposite side is half of the hypotenuse, and the lamp frame 61 reaches a maximum inclination angle of 30°. Specifically, it can be set according to the radius of the transmission wheel 2 83, the angle adjustment wheel 81 and the transmission wheel 1 82.

[0032] Embodiment 3, based on the above embodiment, further includes: multiple groups of medicine tubes 63 are fixedly installed on the bottom of the lamp frame 61, the multiple groups of medicine tubes 63 are cross-distributed with the multiple groups of lamp tubes 62, the outlets of the medicine tubes 63 are close to the top of the lamp frame 61, the medicine tubes 63 in the primary treatment tank 2 are connected to the primary medicine pump 31, and the medicine tubes 63 in the secondary treatment tank 1 are connected to the secondary medicine pump 41.

[0033] With this design, when the tilt angle of the lamp frame 61 changes, a large height difference will be generated at the outlet of the medicine tube 63, thereby slowing down the liquid flow rate and changing the amount of hydrogen peroxide added per unit time. This allows the amount of hydrogen peroxide added to change synchronously with the tilt angle of the lamp frame 61, reducing the difficulty of adjusting the system.

[0034] It should be noted that when treating sewage, the inclination angle of the lamp frame 61 and the inclination angle of the medicine tube 63 are first adjusted according to the sewage concentration. After the adjustment is completed, hydrogen peroxide is first injected into the treatment tank. After the injection is completed, the lamp frame 61 is controlled to swing in the treatment tank for a period of time to play a stirring role so that the hydrogen peroxide and sewage are fully mixed. After mixing, the lamp frame 61 is reset and ultraviolet light-hydrogen peroxide combined treatment is carried out to further improve the treatment efficiency.

[0035] Embodiment 4, based on the above embodiment, further includes: an adjusting weight sleeve 64 is sleeved on the outer side of the lamp tube 62, adjacent adjusting weight sleeves 64 are fixedly connected by a connecting plate 68, an electromagnetic valve 69 is provided inside the connecting plate 68, and the medicine tube 63 is connected to the electromagnetic valve 69.

[0036] Furthermore, the adjusting weight sleeve 64 is composed of an outer tungsten ring and an inner cleaning ring, and the inner cleaning ring is made of polytetrafluoroethylene.

[0037] Tungsten is a very corrosion-resistant metal, especially at high temperatures, offering excellent resistance to many chemicals, including hydrogen peroxide and formaldehyde. Its high density also results in a smaller volume per weight. Polytetrafluoroethylene (PTFE) is highly resistant to most chemicals, including formaldehyde and hydrogen peroxide. Although PTFE is a plastic, its flexibility and high-temperature resistance make it suitable for use in flexible components, making it less likely to scratch the exterior of lamp tube 62 when cleaning.

[0038] During normal irradiation, the adjusting weight sleeve 64 is fixed at the top of the lamp tube 62, which does not affect normal irradiation. When the lamp tube 62 needs to be cleaned, the adjusting weight sleeve 64 is unlocked, and then the ultraviolet catalytic component 6 is adjusted to the maximum inclination angle, and the solenoid valve 69 is closed. The adjusting weight sleeve 64 will slide downward along the outer surface of the lamp tube 62 under the action of gravity, and the inner cleaning ring cleans the lamp tube 62. When the adjusting weight sleeve 64 is at the bottom, the first-level medicine pump 31 is controlled to start, and the first-level medicine pump 31 pumps the medicine liquid into the medicine tube 63. The pressure in the medicine tube 63 increases, and the medicine tube 63 straightens when the medicine liquid is present. The medicine tube 63 pushes the adjusting weight sleeve 64 upward. By repeatedly opening and closing the first-level medicine pump 31, and cooperating with the gravity of the adjusting weight sleeve 64 itself, the adjusting weight sleeve 64 can slide back and forth to completely clean the surface of the lamp tube 62 without manual entry for cleaning. The cleaning effect is good, and no additional cleaning structure needs to be added, and the structure is compact.

[0039] Embodiment 5, based on the above embodiment, further includes: multiple groups of medicine tubes 63 are fixedly installed with tube clamp rods 65, the top of the lamp frame 61 is fixedly installed with an electromagnetic rod 67, the electromagnetic rod 67 is adsorbed with a suction plate 66, and multiple groups of tube clamp rods 65 are fixedly connected to the suction plate 66 at the same time.

[0040] Furthermore, the electromagnetic rod 67 is composed of a polytetrafluoroethylene outer shell and an electromagnetic inner core to prevent the electromagnetic inner core from being corroded.

[0041] During normal use, the electromagnetic core is energized to generate magnetic force, causing the suction plate 66 to be adsorbed on the electromagnetic rod 67, and the adjustment weight sleeve 64 is limited by the tube clamp rod 65. When cleaning is required, the electromagnetic core is de-energized and the adjustment weight sleeve 64 can slide downward.

[0042] The sixth embodiment, based on the above embodiment, further includes that the portion of the medicine tube 63 between the tube clamp rod 65 and the connecting plate 68 is provided with an adjusting head 631 , and an inner elastic bar skeleton 632 is provided inside the adjusting head 631 .

[0043] Furthermore, adjustment sleeves 621 are provided at both ends of the lamp tube 62 .

[0044] This embodiment can also increase the range of drug dosage adjustment. The method of simply increasing the outlet height of the drug tube 63 in the above embodiment to achieve drug dosage control may not be accurate enough. Therefore, by setting the adjustment head 631 and the inner elastic bar skeleton 632, when the inclination angle of the lamp frame 61 increases, the adjustment weight sleeve 64 is also raised, and the pressure exerted by the adjustment weight sleeve 64 on the adjustment head 631 increases. The adjustment head 631 is bent from a straight line into an S shape, and the greater the inclination angle of the lamp frame 61, the greater the S-shaped bending angle of the adjustment head 631, and the greater the limiting force exerted on the drug liquid. , and thus the liquid medicine control can be achieved more finely, and the control spacing is realized on the upper adjustment sleeve 621, and the irradiation part of the lamp tube 62 will not be blocked. At the same time, due to the setting of the inner elastic bar frame 632, the adjustment weight sleeve 64 will slide to the lower adjustment sleeve 621 during cleaning, and there is a certain distance from the bottom of the lamp frame 61 to ensure that the adjustment weight sleeve 64 can completely clean the irradiation part of the lamp tube 62. At the same time, the inner elastic bar frame 632 gives the adjustment weight sleeve 64 a buffering effect to prevent it from directly hitting the lamp frame 61, and the operation stability is high.

[0045] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A system for treating wastewater with high concentration of formaldehyde, comprising a secondary treatment tank (1), characterized in that: A filter (5) is provided on the top of the secondary treatment pool (1), and two groups of primary treatment pools (2) are provided on the top of the filter (5). The bottom areas of the primary treatment pool (2) and the secondary treatment pool (1) are the same, and the depth of the secondary treatment pool (1) is twice that of the primary treatment pool (2). An ultraviolet catalytic component (6) is provided inside both the primary treatment pool (2) and the secondary treatment pool (1). The ultraviolet catalytic component (6) can be raised and lowered, and the tilt angle is adjustable. The tilt angle of the ultraviolet catalytic component (6) in the primary treatment pool (2) is 0-30°, and the tilt angle of the ultraviolet catalytic component (6) in the secondary treatment pool (1) is 60-90°. The primary treatment pool (2) is connected to the filter (5) through a primary drain port (21), and a secondary drain port (11) is provided at the bottom of the secondary treatment pool (1); A primary medicine box (3) and a secondary medicine box (4) are respectively provided on both sides of the secondary treatment tank (1). The primary medicine box (3) can inject the hydrogen peroxide inside into the primary treatment tank (2) through a primary medicine pump (31), and the secondary medicine box (4) can inject the hydrogen peroxide inside into the secondary treatment tank (1) through a secondary medicine pump (41).

2. A system for treating high-concentration formaldehyde wastewater according to claim 1, characterized in that: The inner walls of the primary treatment pool (2) and the secondary treatment pool (1) are both fixedly mounted with a lifting cylinder (7), and the telescopic end of the lifting cylinder (7) is fixedly mounted with a lifting rod (8). The ultraviolet catalytic component (6) includes a lamp frame (61) rotatably mounted on the lifting rod (8), and a plurality of lamp tubes (62) are arranged side by side inside the lamp frame (61). An angle adjustment wheel (81) is fixedly mounted at the rotation center of the lamp frame (61). A transmission wheel 1 (82) is rotatably mounted on the outer side of the lifting rod (8), and the transmission wheel 1 (82) is meshed with the angle adjustment wheel (81). A transmission wheel 2 (83) is fixedly mounted on the outer side of the transmission wheel 1 (82). A transmission rack (9) is fixedly mounted on the inner walls of the primary treatment pool (2) and the secondary treatment pool (1), and the transmission wheel 2 (83) is meshed with the transmission rack (9). The radius of the transmission wheel 2 (83) and the angle adjustment wheel (81) is larger than that of the transmission wheel 1 (82).

3. A system for treating high-concentration formaldehyde wastewater according to claim 2, characterized in that: A plurality of groups of drug tubes (63) are fixedly mounted on the bottom of the lamp frame (61), and the plurality of groups of drug tubes (63) are cross-distributed with the plurality of groups of lamp tubes (62). The outlets of the drug tubes (63) are close to the top of the lamp frame (61). The drug tubes (63) in the primary treatment tank (2) are connected to the primary drug pump (31), and the drug tubes (63) in the secondary treatment tank (1) are connected to the secondary drug pump (41).

4. A system for treating high-concentration formaldehyde wastewater according to claim 3, characterized in that: An adjusting weight sleeve (64) is sleeved on the outer side of the lamp tube (62), and adjacent adjusting weight sleeves (64) are fixedly connected via a connecting plate (68). An electromagnetic valve (69) is provided inside the connecting plate (68), and the medicine tube (63) is connected to the electromagnetic valve (69).

5. A system for treating high-concentration formaldehyde wastewater according to claim 4, characterized in that: The adjusting weight sleeve (64) is composed of an outer tungsten ring and an inner cleaning ring, and the inner cleaning ring is made of polytetrafluoroethylene.

6. A system for treating high-concentration formaldehyde wastewater according to claim 5, characterized in that: A tube clamping rod (65) is fixedly mounted on each of the plurality of medicine tubes (63), an electromagnetic rod (67) is fixedly mounted on the top of the lamp frame (61), a suction plate (66) is adsorbed on the electromagnetic rod (67), and the plurality of tube clamping rods (65) are fixedly connected to the suction plate (66) at the same time.

7. A system for treating high-concentration formaldehyde wastewater according to claim 6, characterized in that: The electromagnetic rod (67) consists of a polytetrafluoroethylene outer shell and an electromagnetic inner core.

8. A system for treating high-concentration formaldehyde wastewater according to claim 7, characterized in that: The portion of the medicine tube (63) located between the tube clamp rod (65) and the connecting plate (68) is provided with an adjusting head (631), and an inner elastic strip skeleton (632) is provided inside the adjusting head (631).

9. A system for treating high-concentration formaldehyde wastewater according to claim 8, characterized in that: Adjustment sleeves (621) are provided at both ends of the lamp tube (62).

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