A catalytic ozone oxidation papermaking wastewater advanced treatment device

Abstract

This utility model discloses a catalytic ozone oxidation deep treatment device for papermaking wastewater, including a base, a treatment mechanism mounted on the top of the base, a cover plate mounted on the top of the treatment mechanism, an inlet pipe and a pressure relief valve mounted on the cover plate, and a transfer mechanism and an air pipe installed inside the treatment mechanism. The air pipe is inserted into the treatment mechanism and connected to an aeration disc. This utility model achieves highly efficient synergy between catalytic oxidation and adsorption processes by integrating an aeration disc and a filter cartridge within the treatment tank. It eliminates the need for multiple devices connected in series to complete deep wastewater treatment, reducing connecting pipelines and floor space. The nozzle of the transfer mechanism enhances the contact between wastewater and ozone and activated carbon, strengthening the reaction and adsorption effects. The filter cartridge is easily replaceable via a threaded sleeve, ensuring continuous and stable operation. This device improves pollutant removal efficiency and water purification effect while reducing equipment costs and maintenance difficulty, significantly improving overall work efficiency and possessing strong practical value.

Description

Technical Field

[0001] This utility model relates to the field of wastewater deep treatment technology, and in particular to a device for deep treatment of papermaking wastewater by catalytic ozone oxidation. Background Technology

[0002] Catalytic ozone oxidation technology, as a highly efficient advanced oxidation technology, has received widespread attention and application in the deep treatment of wastewater in the paper industry. It generates highly oxidizing active species such as hydroxyl radicals under the action of ozone and catalysts, which can effectively degrade recalcitrant organic matter in wastewater, reduce color and chemical oxygen demand (COD), and oxidize reducing pollutants in wastewater (such as ferrous ions) into easily removable forms (such as ferric ions). It plays an important role in improving wastewater quality and achieving deep purification.

[0003] Currently, existing catalytic ozone oxidation wastewater treatment devices for papermaking typically consist of an ozone generation system, a catalytic reaction unit, and a subsequent treatment unit (such as an adsorption unit). The catalytic reaction unit usually adopts a fixed bed or fluidized bed structure, where the catalyst is filled and fully contacts the ozone and wastewater to complete the oxidation reaction. The adsorption unit is usually set up separately and often uses adsorption materials such as activated carbon to further remove pollutants after oxidation to meet emission requirements.

[0004] However, existing devices have significant shortcomings in practical applications: the catalytic oxidation reaction and adsorption process are difficult to coordinate efficiently in a single device, resulting in the inability to completely remove pollutants in a single treatment. Often, the catalytic device and the adsorption device need to be used in series, which not only increases the number of devices and connecting pipelines, but also occupies a large amount of production space. To solve this problem, we propose a catalytic ozone oxidation deep treatment device for papermaking wastewater. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a catalytic ozone oxidation device for the deep treatment of papermaking wastewater.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A catalytic ozone oxidation deep treatment device for papermaking wastewater includes a base, a treatment mechanism installed on the top of the base, a cover plate installed on the top of the treatment mechanism, an inlet pipe and a pressure relief valve installed on the cover plate, a liquid transfer mechanism and an air pipe installed inside the treatment mechanism, and the air pipe is inserted into the interior of the treatment mechanism and connected to an aeration disc.

[0008] The processing mechanism includes a processing tank fixed to the top of the base. A first liquid pump is installed at one end of the bottom of the processing tank. A drain pipe is installed on the side of the first liquid pump and passes through the side of the processing tank. A threaded sleeve is installed on the inner wall of the processing tank. A filter cartridge is connected to the inside of the threaded sleeve by threads. Filter screens are installed at the top and bottom of the filter cartridge. The inside of the filter cartridge is filled with an activated carbon filter element.

[0009] Preferably, the cover plate is threaded onto the top of the treatment tank, the inlet pipe is used to inject a fixed amount of papermaking wastewater, and the pressure relief valve is used to balance the internal and external pressures of the treatment tank.

[0010] Preferably, the liquid transfer mechanism includes a second liquid pump installed at one end of the inner bottom of the treatment tank and a housing fixedly sleeved on the outer wall of the treatment tank. A connecting pipe is installed on the side of the second liquid pump, the connecting pipe passes through the side of the treatment tank and is inserted into the bottom of the housing. A nozzle is installed on the housing and is inserted into the interior of the treatment tank.

[0011] Preferably, the number of nozzles is several groups, and the several groups of nozzles are located on the side of the housing and are distributed in a circumferential array.

[0012] Preferably, the air pipe is installed on the side of the treatment tank and inserted into the interior of the treatment tank. The bottom of the aeration disc has air holes, and the number of air holes is several groups, which are located at the bottom of the aeration disc and are distributed in a circumferential array.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention utilizes an integrated aeration disc inside the treatment tank to introduce ozone for catalytic oxidation, while the activated carbon filter cartridge inside the filter cylinder further adsorbs and removes the oxidized pollutants. Both processes are completed in the same device, reducing the number of devices and connecting pipelines, significantly saving production space, and improving the removal effect of pollutants in a single treatment, thus avoiding the hassle of multiple treatments.

[0015] In addition, the liquid transfer mechanism uses a second liquid pump to transport part of the wastewater in the treatment tank to the shell through a connecting pipe, and then sprays it back into the treatment tank by a circumferentially arrayed nozzle, increasing the contact opportunities between the wastewater and ozone and activated carbon, thus enhancing the reaction and adsorption effects. The filter cartridge is connected to the inner wall of the treatment tank through a threaded sleeve, which facilitates the periodic disassembly and replacement of the activated carbon filter element, ensuring the continuous and stable operation of the device. This not only improves the efficiency of wastewater treatment and the water purification effect, but also reduces equipment maintenance costs and significantly improves overall work efficiency. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of a catalytic ozone oxidation deep treatment device for papermaking wastewater proposed in this utility model;

[0017] Figure 2 for Figure 1 Front sectional view;

[0018] Figure 3 for Figure 1 Installation diagram of the central nozzle.

[0019] In the diagram: 1. Base, 2. Processing mechanism, 21. Processing tank, 22. First liquid pump, 23. Drain pipe, 24. Threaded sleeve, 25. Filter cartridge, 26. Filter screen, 27. Activated carbon filter element, 3. Cover plate, 4. Inlet pipe, 5. Pressure relief valve, 6. Transfer mechanism, 61. Second liquid pump, 62. Connecting pipe, 63. Housing, 64. Nozzle, 7. Air pipe, 8. Aeration disc. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-3 A catalytic ozone oxidation deep treatment device for papermaking wastewater includes a base 1, a treatment mechanism 2 installed on the top of the base 1, a cover plate 3 installed on the top of the treatment mechanism 2, an inlet pipe 4 and a pressure relief valve 5 installed on the cover plate 3, a liquid transfer mechanism 6 and an air pipe 7 installed inside the treatment mechanism 2, and the air pipe 7 is inserted into the inside of the treatment mechanism 2 and connected to an aeration disc 8.

[0022] In this embodiment, refer to Figure 1 and Figure 2 The treatment unit 2 includes a treatment tank 21 fixed to the top of the base 1. A first liquid pump 22 installed at the bottom of the treatment tank 21 cooperates with a drain pipe 23 that runs through the side to quickly discharge qualified wastewater. The threaded sleeve 24 on the inner wall is threadedly connected to the filter cartridge 25, which is convenient for periodic disassembly and replacement of the filter cartridge 25 to ensure continuous adsorption capacity. The filter screens 26 at the top and bottom of the filter cartridge 25 can intercept larger impurities, while the activated carbon filter element 27 filled inside deeply adsorbs pollutants after oxidation, forming a synergy with the aeration system in the treatment tank 21. The cover plate 3 is fixed to the top of the treatment tank 21 by threads to form a sealed space. The liquid inlet pipe 4 accurately injects wastewater, and the pressure relief valve 5 balances the internal and external pressures. The ozone delivered by the air pipe 7 is released through the air holes distributed in the circumferential array at the bottom of the aeration disc 8, which greatly increases the contact area with the wastewater, improves the catalytic oxidation efficiency, and realizes the efficient synergy of oxidation and adsorption in a single device, reducing the need for equipment series connection.

[0023] In this embodiment, refer to Figure 1 , Figure 2 and Figure 3The liquid transfer mechanism 6 draws a portion of the wastewater through the second liquid pump 61 at the bottom of the treatment tank 21, and transports it through the connecting pipe 62 to the shell 63 fixed on the outer wall of the tank. Then, the wastewater is sprayed back into the treatment tank 21 by the nozzles 64 arranged in a circular array on the side of the shell 63. This design allows the wastewater to circulate, significantly increasing the frequency and area of ​​contact with ozone and activated carbon filter 27, enhancing the catalytic oxidation reaction and adsorption effect, and avoiding the problem of insufficient local treatment. The array distribution of the nozzles 64 ensures that the wastewater is evenly dispersed, further improving the overall treatment efficiency. Together with other components of the treatment mechanism, it achieves high efficiency and stability in deep purification of wastewater.

[0024] During use, the inlet pipe 4 injects papermaking wastewater into the treatment tank 21. The cover plate 3 is fixed to the top of the treatment tank 21 by threads to form a sealed space. The pressure relief valve 5 automatically adjusts according to the pressure changes inside the treatment tank 21 to maintain internal and external pressure balance. The air pipe 7 delivers ozone to the aeration disc 8. The air holes at the bottom of the aeration disc 8 release ozone, allowing the ozone to fully contact the wastewater in the treatment tank 21, resulting in a catalytic oxidation reaction that degrades recalcitrant organic matter and transforms reducing pollutants. In the transfer mechanism 6, the second liquid pump 61 draws part of the wastewater from the treatment tank 21. Wastewater is separated and transported to the housing 63 via the connecting pipe 62. The nozzle 64 on the side of the housing 63 sprays the wastewater back into the treatment tank 21, increasing the contact opportunity between the wastewater and ozone and the adsorption material. When the wastewater flows through the filter cartridge 25, the filter screen 26 intercepts larger impurities, and the activated carbon filter element 27 adsorbs the oxidized pollutants. After treatment, the first liquid pump 22 is started to discharge the qualified wastewater in the treatment tank 21 through the drain pipe 23. The filter cartridge 25 is connected to the treatment tank 21 through the threaded sleeve 24, which can be disassembled and replaced regularly to ensure stable adsorption effect.

[0025] In summary, this invention achieves highly efficient synergy between catalytic oxidation and adsorption processes by integrating an aeration disc and a filter cartridge within the treatment tank. It eliminates the need for multiple devices connected in series to complete deep wastewater treatment, reducing connecting pipelines and floor space requirements. The nozzles of the liquid transfer mechanism enhance the contact between wastewater and ozone and activated carbon, strengthening the reaction and adsorption effects. The filter cartridge, with its threaded sleeve, facilitates easy replacement and ensures continuous and stable operation. This device not only improves pollutant removal efficiency and water purification effects but also reduces equipment costs and maintenance difficulty, significantly improving overall work efficiency and demonstrating strong practical value.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for deep treatment of papermaking wastewater by catalytic ozone oxidation, comprising a base (1), characterized in that, The base (1) is equipped with a processing mechanism (2) on top, and a cover plate (3) is installed on top of the processing mechanism (2). An inlet pipe (4) and a pressure relief valve (5) are installed on the cover plate (3). A liquid transfer mechanism (6) and an air pipe (7) are installed inside the processing mechanism (2). The air pipe (7) is inserted into the processing mechanism (2) and connected to an aeration disc (8). The processing mechanism (2) includes a processing tank (21) fixed to the top of the base (1). A first liquid pump (22) is installed at one end of the bottom of the processing tank (21). A drain pipe (23) is installed on the side of the first liquid pump (22). The drain pipe (23) passes through the side of the processing tank (21). A threaded sleeve (24) is installed on the inner wall of the processing tank (21). A filter cartridge (25) is connected to the inside of the threaded sleeve (24) by threads. Filter screens (26) are installed at the top and bottom of the filter cartridge (25). The inside of the filter cartridge (25) is filled with an activated carbon filter element (27).

2. The catalytic ozone oxidation deep treatment device for papermaking wastewater according to claim 1, characterized in that, The cover plate (3) is threaded onto the top of the treatment tank (21), the inlet pipe (4) is used to inject a fixed amount of papermaking wastewater, and the pressure relief valve (5) is used to balance the internal and external pressure of the treatment tank (21).

3. The catalytic ozone oxidation deep treatment device for papermaking wastewater according to claim 1, characterized in that, The liquid transfer mechanism (6) includes a second liquid pump (61) installed at one end of the inner bottom of the treatment tank (21) and a housing (63) fixedly sleeved on the outer wall of the treatment tank (21). A connecting pipe (62) is installed on the side of the second liquid pump (61). The connecting pipe (62) passes through the side of the treatment tank (21) and is inserted into the bottom of the housing (63). A nozzle (64) is installed on the housing (63) and is inserted into the interior of the treatment tank (21).

4. The catalytic ozone oxidation deep treatment device for papermaking wastewater according to claim 3, characterized in that, The number of nozzles (64) is several groups, and the several groups of nozzles (64) are located on the side of the housing (63) and are distributed in a circumferential array.

5. The catalytic ozone oxidation deep treatment device for papermaking wastewater according to claim 1, characterized in that, The air pipe (7) is installed on the side of the treatment tank (21) and inserted into the interior of the treatment tank (21). The bottom of the aeration disc (8) is provided with air holes. The number of air holes is several groups, and the several groups of air holes are located at the bottom of the aeration disc (8) and are distributed in a circumferential array.

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