A device for treating wastewater by ultraviolet photocatalytic oxidation

Abstract

The utility model relates to wastewater treatment device technical field, concretely relates to a kind of wastewater treatment devices of ultraviolet light catalytic oxidation, comprising: water delivery system, photocatalytic reaction pool, the pretreatment mechanism for the wastewater that is transported to photocatalytic reaction pool is pretreated;The utility model relates to a kind of wastewater treatment devices of ultraviolet light catalytic oxidation by setting pretreatment mechanism, when motor rotates, on the one hand, drive flexible filter cloth on driving cylinder along the established direction moves.Mechanical scraping is carried out to the dirt adhered to the surface of filter cloth by the dirt scraping plate arranged above filter cloth, and the cleaning efficiency of filter cloth and wastewater treatment effect are improved;On the other hand, synchronously drive clean block reciprocating linear motion along preset movement groove, and dirt accumulated on dirt scraping plate is effectively pushed to both sides, until dirt is transferred to preset dirt storage groove, so as to prevent dirt stacking in dirt scraping plate from affecting filtration.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment device technology, specifically to a wastewater treatment device using ultraviolet photocatalytic oxidation. Background Technology

[0002] With the increasing complexity of industrial wastewater discharge and the increasingly stringent environmental standards, traditional wastewater treatment technologies are unable to meet the needs of deep purification due to their low removal efficiency for highly toxic and recalcitrant organic matter and their tendency to generate secondary pollution. Against this backdrop, ultraviolet photocatalytic oxidation wastewater treatment devices, which utilize ultraviolet light to excite photocatalysts (such as TiO2 or H2O2) to generate highly oxidizing hydroxyl radicals (·OH), can efficiently and non-selectively mineralize organic pollutants into CO2, H2O, and inorganic salts. They also have advantages such as low sludge production, low energy consumption, and no secondary pollution, and are gradually becoming a key technology for treating highly toxic wastewater such as pharmaceutical wastewater, pesticide wastewater, and landfill leachate.

[0003] Patent application CN202421618706.X discloses an ultraviolet catalytic oxidation wastewater treatment device, relating to the field of wastewater treatment technology. It includes a photocatalytic reaction tank and ultraviolet light emitting devices. Several ultraviolet light emitting devices are uniformly and fixedly installed inside the photocatalytic reaction tank, and glass covers are fixedly installed on the outside of the ultraviolet light emitting devices. A mounting bracket is fixedly installed at the upper end of the photocatalytic reaction tank. In this invention, a first driving component drives a cleaner to rotate, cleaning the outside of the glass cover. Simultaneously, a second driving component drives four cleaners to rotate around the center of the drive shaft, thus thoroughly cleaning the outside of the glass cover and effectively removing solid debris. The ultraviolet light emitted by the ultraviolet light emitting devices is not blocked by solid debris, thereby maintaining the efficiency of the photocatalytic oxidation of wastewater in the photocatalytic reaction tank.

[0004] However, this patent cannot pre-treat larger particles before ultraviolet catalytic oxidation treatment of wastewater, which results in solid impurities adhering to the outside of the ultraviolet light emitting device too quickly, increasing the cleaning frequency.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of this utility model is to provide a wastewater treatment device using ultraviolet photocatalytic oxidation that can effectively solve the above-mentioned technical problems.

[0007] To achieve the purpose of this utility model, the following technical solution is adopted:

[0008] A wastewater treatment device for ultraviolet photocatalytic oxidation includes: a water conveying system, a photocatalytic reaction tank, and a pretreatment mechanism for pretreating the wastewater conveyed to the photocatalytic reaction tank;

[0009] The pretreatment mechanism includes: a mounting frame fixedly installed on the upper end of the photocatalytic reaction tank; a drive motor fixedly installed on the mounting frame; a drive roller fixedly connected to the output shaft of the motor; a flexible filter cloth wrapped around the drive roller; a scraper for scraping off dirt from the filter cloth; and a collection assembly for collecting dirt from the scraper; the scraper is fixedly installed on the mounting frame.

[0010] Furthermore, the scraper blade is composed of a support platform and an arc-shaped plate.

[0011] Furthermore, the collection assembly includes: a movable groove on the support platform, a reciprocating screw rotatably installed in the movable groove, and a cleaning block threadedly connected to the reciprocating screw; the cleaning block is slidably installed in the movable groove; the reciprocating screw is connected to the drive roller via a transmission component.

[0012] Furthermore, the scraper blade is provided with scale storage tanks at both ends.

[0013] Furthermore, ultraviolet light emitters are installed at equal intervals within the photocatalytic reaction tank.

[0014] Furthermore, a water spray nozzle is provided above the flexible filter cloth; the water spray nozzle is connected to the water supply system.

[0015] Compared with existing technologies, this utility model has the following advantages: The wastewater treatment device using ultraviolet photocatalytic oxidation of this utility model incorporates a pretreatment mechanism. When the motor rotates, it drives the flexible filter cloth on the drive roller to move in a predetermined direction. A scraper plate positioned above the filter cloth mechanically scrapes away the dirt adhering to its surface, improving the cleaning efficiency of the filter cloth and the wastewater treatment effect. Simultaneously, it drives the cleaning block to reciprocate linearly along a preset moving groove, effectively pushing the dirt accumulated on the scraper plate to both sides until the dirt is transferred to a preset dirt storage tank, thereby preventing dirt accumulation on the scraper plate from affecting filtration. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0017] Figure 1 This is a schematic diagram of the structure of a new type of wastewater treatment device using ultraviolet photocatalytic oxidation.

[0018] Figure 2This is a schematic diagram of the structure of the new pretreatment mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the new spray nozzle of this practical model;

[0020] Figure 4 This is another structural schematic diagram of the new pretreatment mechanism of this utility model;

[0021] Figure 5 This is a sectional view of the new pretreatment mechanism of this utility model;

[0022] Figure 6 for Figure 5 A magnified view of part A in the middle.

[0023] In the diagram: 1. Water supply system; 2. Photocatalytic reaction tank; 3. Pretreatment mechanism; 31. Mounting frame; 32. Drive motor; 33. Drive roller; 34. Flexible filter cloth; 35. Scraper; 36. Collection assembly; 351. Support platform; 352. Arc plate; 361. Moving trough; 362. Reciprocating screw; 363. Cleaning block; 364. Transmission component; 365. Scale storage tank; 21. Ultraviolet emitter; 11. Spray nozzle. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model more clear, the technical solutions in this utility model will be clearly and completely described below in conjunction with the new utility model embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0025] In the description of this utility model, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. When a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component present. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0026] like Figures 1 to 6As shown, this utility model discloses a new wastewater treatment device for ultraviolet photocatalytic oxidation, comprising: a water supply system 1, a photocatalytic reaction tank 2, and a pretreatment mechanism 3 for pretreating the wastewater supplied to the photocatalytic reaction tank 2; ultraviolet light emitters 21 are equidistantly installed in the photocatalytic reaction tank 2.

[0027] In the industrial wastewater treatment process, a water conveyance system 1 is used to guide and transport the wastewater generated during industrial production into the photocatalytic reaction tank 2. During the wastewater transport stage, the Fenton oxidation process is implemented simultaneously. Through a chain reaction initiated by Fenton's reagent, highly oxidizing hydroxyl radicals (·OH) are generated, which can efficiently oxidize and decompose organic pollutants in the wastewater, thereby significantly improving the removal efficiency of chemical oxygen demand (COD). It should be noted that the water conveyance system 1 involved in this process is a mature existing technology, and its specific structure and operating mechanism will not be described in detail here.

[0028] The pretreatment mechanism 3 includes: a mounting frame 31 fixedly installed on the upper end of the photocatalytic reaction tank 2; a drive motor 32 fixedly installed on the mounting frame 31; a drive roller 33 fixedly connected to the output shaft of the motor; a flexible filter cloth 34 wrapped around the drive roller 33; a scraper 35 for scraping off dirt from the filter cloth; and a collection assembly 36 for collecting dirt from the scraper 35. The scraper 35 is fixedly installed on the mounting frame 31. A water spray nozzle 11 is provided above the flexible filter cloth 34. The water spray nozzle 11 is connected to the water supply system 1.

[0029] In the photocatalytic treatment process of industrial wastewater, the water supply system 1 is first started, which precisely guides the industrial wastewater to the spray nozzles 11. It should be noted that the spray nozzles 11 are distributed in an equidistant array along the width direction of the flexible filter cloth 34 to ensure uniform spraying of wastewater. When the wastewater is transported to the spray nozzles 11 through the water supply system 1, it is sprayed onto the upper surface of the flexible filter cloth 34 in the form of atomization or uniform water distribution through the spray nozzles 11.

[0030] The flexible filter cloth 34 is made of polypropylene double-layer nonwoven fabric (item number: 240216) produced by Shandong Baihuihe Filter Materials Co., Ltd., which has good filtration performance and mechanical strength. After the wastewater is sprayed onto the flexible filter cloth 34, the physical interception effect of the filter cloth effectively removes suspended solids (SS) from the wastewater, preventing high concentrations of suspended solids from adversely affecting subsequent photocatalytic reactions, such as blocking ultraviolet light, reducing the utilization rate of photocatalyst active sites, or even covering the reactor surface, thereby leading to a significant decrease in treatment efficiency.

[0031] After being filtered through the flexible filter cloth 34, impurities in the wastewater are trapped and adhere to the surface of the filter cloth, while the filtered wastewater falls into the photocatalytic reaction tank 2. In the photocatalytic reaction tank 2, ultraviolet light generated by the ultraviolet light emitter 21 excites the photocatalyst to perform deep oxidation treatment on the wastewater, so as to achieve the goal of wastewater meeting discharge standards or being utilized as a resource.

[0032] As wastewater is sprayed onto the upper surface of the flexible filter cloth 34, the drive motor 32 is activated. The motor drives the drive roller 33 to rotate via a transmission mechanism, thereby driving the flexible filter cloth 34 surrounding the drive roller 33 to move in a predetermined direction. During the movement of the flexible filter cloth 34, the scraper 35, which is horizontally mounted above the filter cloth, mechanically scrapes away the dirt adhering to the surface of the filter cloth, ensuring that the area of ​​the flexible filter cloth 34 below the spray nozzle 11 remains clean, thereby improving the cleaning efficiency of the filter cloth and the wastewater treatment effect.

[0033] The scraper 35 consists of a support platform 351 and an arc-shaped plate 352. The collection assembly 36 includes: a movable groove 361 formed on the support platform 351, a reciprocating screw 362 rotatably installed in the movable groove 361, and a cleaning block 363 threadedly connected to the reciprocating screw 362; the cleaning block 363 is slidably installed in the movable groove 361; the reciprocating screw 362 is connected to the drive roller 33 via a transmission component 364; and the scraper 35 has dirt storage grooves 365 at both ends.

[0034] During the rotation of the drive roller 33 driven by the motor, the reciprocating screw 362 is synchronously driven to rotate via the transmission component 364. It should be noted that the transmission component 364 preferably adopts a belt drive mechanism, which has advantages such as simple structure and shock absorption; however, it can also be replaced by a gear drive mechanism to adapt to the transmission requirements under different working conditions. When the reciprocating screw 362 rotates, its threaded pair cooperates with the nut structure inside the cleaning block 363, driving the cleaning block 363 to perform reciprocating linear motion along the preset moving groove 361.

[0035] The moving groove 361 is oriented in the same direction as the length of the scraper 35 to ensure that the movement trajectory of the cleaning block 363 matches the dirt accumulation area on the surface of the scraper 35. As the cleaning block 363 reciprocates along the moving groove 361, its cleaning end mechanically pushes the dirt accumulated on the scraper 35 to both sides until the dirt is transferred into the pre-set dirt storage tank 365. This design effectively prevents dirt from accumulating on the surface of the scraper 35, ensuring the continuous and efficient operation of the scraper 35, thereby improving the filtration performance of the flexible filter cloth 34 and the overall operating efficiency of the wastewater treatment system.

[0036] In summary, when the motor rotates, it drives the flexible filter cloth 34 on the drive roller 33 to move in a predetermined direction. The scraper 35 located above the filter cloth mechanically scrapes away the dirt adhering to the surface of the filter cloth, improving the cleaning efficiency of the filter cloth and the wastewater treatment effect. On the other hand, it simultaneously drives the drive cleaning block 363 to reciprocate linearly along the preset moving groove 361, effectively pushing the dirt accumulated on the scraper 35 to both sides until the dirt is transferred into the preset dirt storage tank 365, thereby preventing dirt from accumulating on the scraper 35 and affecting filtration.

[0037] Working Principle: In the photocatalytic treatment process of industrial wastewater, the water supply system 1 is first started, which precisely guides the industrial wastewater to the spray nozzle 11. Simultaneously, as the wastewater is sprayed onto the upper surface of the flexible filter cloth 34, the drive motor 32 is activated. The motor drives the drive roller 33 to rotate via a transmission mechanism, thereby driving the flexible filter cloth 34 surrounding the drive roller 33 to move in a predetermined direction. During the movement of the flexible filter cloth 34, the scraper 35, horizontally mounted above the filter cloth, mechanically scrapes away the dirt adhering to the surface of the filter cloth. Simultaneously, the drive cleaning block 363 moves in a reciprocating linear motion along a preset moving groove 361, effectively pushing the dirt accumulated on the scraper 35 to both sides until the dirt is transferred to the preset dirt storage tank 365, thus preventing dirt accumulation on the scraper 35 from affecting filtration.

[0038] All standard parts used in this utility model can be purchased from the market. Irregular parts can be customized according to the description in the instruction manual and the attached drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology. In addition, the circuit connection adopts conventional connection methods in the existing technology, which will not be described in detail here. The contents not described in detail in this instruction manual belong to the prior art known to those skilled in the art.

[0039] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims of this utility model.

Claims

1. A wastewater treatment device using ultraviolet photocatalytic oxidation, characterized in that, include: Water conveyance system, photocatalytic reaction tank, and pretreatment mechanism for pretreating wastewater transported to the photocatalytic reaction tank; The pretreatment mechanism includes: a mounting frame fixedly installed on the upper end of the photocatalytic reaction tank; a drive motor fixedly installed on the mounting frame; a drive roller fixedly connected to the output shaft of the motor; a flexible filter cloth wrapped around the drive roller; a scraper for scraping off dirt from the filter cloth; and a collection assembly for collecting dirt from the scraper; the scraper is fixedly installed on the mounting frame.

2. The wastewater treatment device for ultraviolet photocatalytic oxidation as described in claim 1, characterized in that; The scraper blade consists of a support platform and an arc-shaped plate.

3. The wastewater treatment device for ultraviolet photocatalytic oxidation as described in claim 2, characterized in that, The collection assembly includes: a movable groove on the support platform, a reciprocating screw rotatably installed in the movable groove, and a cleaning block threadedly connected to the reciprocating screw; the cleaning block is slidably installed in the movable groove; the reciprocating screw is connected to the drive roller via a transmission component.

4. The wastewater treatment device for ultraviolet photocatalytic oxidation as described in claim 3, characterized in that, The scraper blade has scale storage tanks at both ends.

5. The wastewater treatment device for ultraviolet photocatalytic oxidation as described in claim 1, characterized in that, Ultraviolet light emitters are installed at equal intervals inside the photocatalytic reaction tank.

6. The wastewater treatment device for ultraviolet photocatalytic oxidation as described in claim 1, characterized in that, A water spray nozzle is provided above the flexible filter cloth; the water spray nozzle is connected to the water supply system.

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