Environment-friendly sewage treatment device

Abstract

The invention discloses an environment-friendly sewage treatment device which is characterized in that a sewage tank, a mixing tank, a filter pressing device, an oxidation disinfection tank, a catalytic reaction tank, an adsorption tank and a water return tank are arranged in a shell from top to bottom, wastewater in the sewage tank is filtered by a barrel-shaped sand filter screen and then enters the mixing tank to be mixed with liquid medicine sprayed by a spraying device, and then the wastewater enters the filter pressing device; water is separated from precipitated impurities, then enters the oxidation disinfection tank to be disinfected by ozone, then enters the catalytic reaction tank, is added with a catalyst to accelerate an ozone oxidation disinfection reaction, and then enters the adsorption tank to be subjected to final adsorption treatment, so that wastewater treatment is completed; organic pollutants are converted into harmless gas products (CO2), liquid products (water) and solid sludge rich in organic matters; and carrying out solid-liquid separation on the redundant sludge in the filter pressing device under the filter pressing action, and sterilizing and killing bacteria and viruses by using ozone or chlorine. Finally, residual pollutants in water are removed through an activated carbon adsorption method and the like, and then treated water is fed into a reclaimed water channel to be used as circulating water.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment equipment and process technology for non-ferrous metal smelting industry, and particularly relates to a wastewater environmental treatment device. Background Technology

[0002] As the output of non-ferrous metal smelting enterprises continues to increase, the amount of wastewater discharged is also growing. If the organic pollutants, suspended impurities and pathogenic microorganisms contained in the wastewater are discharged or reused without effective treatment, it can easily cause water pollution, ecological damage and even threaten human health. Therefore, wastewater purification has become one of the core requirements for environmental protection and resource recycling. Current mainstream wastewater treatment technologies mostly adopt the basic process of "filtration-reaction-disinfection," but this has significant shortcomings in practical applications: First, the treatment efficiency is low. In traditional processes, the oxidation disinfection reaction relies on the natural action of ozone or chlorine, resulting in a slow reaction rate. Furthermore, the connections between each treatment stage are loose, easily leading to "waiting" bottlenecks and long overall cycles, making it difficult to adapt to wastewater scenarios with high flow rates and high pollutant concentrations. Second, environmental friendliness is insufficient. Although some technologies can remove pollutants, the conversion products still contain trace amounts of harmful components, and incomplete sludge separation can easily cause secondary pollution. At the same time, there is a lack of harmless control over the treated products, which does not meet the industry requirement of "environmental protection throughout the entire process." Third, resource utilization is low. Most treatment technologies only aim at "achieving discharge standards" without establishing a treated water reuse system, resulting in water waste. Moreover, the modularity is low, making it impossible to flexibly adjust the treatment scale according to the wastewater volume, leading to high equipment maintenance costs and poor adaptability. Furthermore, in existing technologies, preliminary filtration often uses planar filters, which are prone to clogging and have limited filtration precision, making it difficult to effectively remove fine suspended impurities. In subsequent reaction stages, uneven mixing of reagents and wastewater further affects pollutant conversion. Deep purification stages often omit adsorption steps, resulting in the incomplete removal of residual trace pollutants in the water, making it difficult for the effluent quality to meet the requirements for recycled water (such as greywater reuse). In summary, the current wastewater treatment technologies suffer from deficiencies in efficiency, environmental friendliness, and resource recycling. There is an urgent need for a new type of treatment device with tightly integrated processes, high reaction efficiency, harmless byproducts, and the ability to reuse water resources, to address industry pain points and meet increasingly stringent environmental standards and resource recycling requirements. Summary of the Invention

[0003] (1) Technical problem to be solved: to provide a new type of treatment device with tight process connection, high reaction efficiency, harmless products and water resource reuse.

[0004] (2) The technical solution adopted in this invention is as follows: A wastewater environmental protection treatment device includes, from top to bottom, a wastewater tank, a mixing tank, a filter press, an oxidation disinfection tank, a catalytic reaction tank, an adsorption tank, and a return water tank, arranged inside a shell. A wastewater pipe is installed above the wastewater tank. Multiple mounting holes are arranged circumferentially at the bottom of the wastewater tank. A barrel-shaped sand filter screen is installed inside the mounting holes and communicates with the mixing tank. A spray device is installed in the mixing tank. The mixing tank is connected to the inlet of the filter press. The outlet of the filter press is connected to the oxidation disinfection tank. The oxidation disinfection tank is connected to an ozone inlet device and is equipped with an exhaust valve. The oxidation disinfection tank and the catalytic reaction tank are connected through a first water channel with a first control valve. A catalyst inlet is provided in the catalytic reaction tank, and a stirring device is installed inside the catalytic reaction tank. The catalytic reaction tank and the adsorption tank are connected through a second water channel with a second control valve. The adsorption tank includes a bottom plate and multiple adsorption columns located on the bottom plate. The multiple adsorption columns are arranged circumferentially and form an adsorption tank with the bottom plate. The adsorption tank is connected to the return water tank.

[0005] A further technical solution is that the filter press device includes a filter press housing, the inside of which is a filter press chamber, and a filter bag is installed inside the filter press chamber. The inlet is located at the top of the filter press housing, and a first one-way valve is installed at the inlet. The outlet is located at the bottom of the filter press housing, and a second one-way valve is installed at the outlet. One end of the filter press housing is equipped with an openable sludge discharge baffle, and the other end is equipped with a hydraulic cylinder. The piston rod of the hydraulic cylinder is located inside the filter press chamber, and a filter press piston is installed at the end of the piston rod. The part of the top of the filter bag away from the filter press piston is a fixed part, and the rest of the top of the filter bag is a movable part. The fixed part is fixed to the filter press housing. A water inlet is opened on the filter bag at the location of the fixed part. The water inlet is connected to the inlet. The opening of the filter bag faces the sludge discharge baffle, and the outlet of the filter bag is fixed to the filter press housing.

[0006] A further technical solution is that the ozone introduction device includes an ozone inlet pipe installed on the side wall of the oxidation disinfection tank, the ozone inlet pipe being connected to a distribution pipe, the distribution pipe being located in the oxidation disinfection tank, and multiple distribution holes being opened on the distribution pipe.

[0007] A further technical solution is that the spraying device includes a dosing inlet pipe provided on the side wall of the mixing tank, an annular guide pipe provided inside the mixing tank, the annular guide pipe being connected to the dosing inlet pipe, and multiple spray heads distributed on the annular guide pipe.

[0008] A further technical solution is that an annular grid cage is set inside the sewage tank, a barrel-shaped sand filter screen is located outside the grid cage, a scraper reduction motor is set on the top of the outer shell, the output shaft of the scraper reduction motor is connected to a rotating scraper through a transmission shaft, a slag storage tank is set on the outer side of the top of the grid cage, and a slag chute is set on the outer side of the slag storage tank.

[0009] (3) The specific mechanisms, principles, and beneficial effects of implementing the above technical solution are as follows: 1. The device of the present invention has high processing efficiency: the entire process of "filtration-reaction-separation-disinfection-adsorption" is connected, and the catalytic step accelerates the reaction and shortens the overall processing cycle.

[0010] 2. Strong environmental protection: The final products of pollutants are mainly in harmless form (CO2, water), sludge can be disposed of separately, and treated water can be recycled, reducing water waste.

[0011] 3. Modular design: Each functional tank / device is independent yet tightly connected, facilitating maintenance, repair, and adjustment of treatment capacity according to wastewater volume.

[0012] 4. Inside the outer casing of the device, from top to bottom, are a wastewater tank, a mixing tank, a filter press, an oxidation disinfection tank, a catalytic reaction tank, an adsorption tank, and a return water tank. Wastewater from the wastewater tank is filtered through a barrel-shaped sand filter and then enters the mixing tank to mix with the chemical solution sprayed by the spraying device. It then enters the filter press to separate the water from the sediment. After that, it enters the oxidation disinfection tank for ozone disinfection, and then enters the catalytic reaction tank where a catalyst is added to accelerate the ozone oxidation disinfection reaction. After completion, it enters the adsorption tank for final adsorption treatment, thus completing the wastewater treatment.

[0013] 5. This invention first uses a scraper motor, reducer, and rotating scraper to remove floating matter and coarse particles from the surface of the collected wastewater, ensuring the smooth operation of subsequent treatment processes. After preliminary filtration, water treatment agents convert organic pollutants into harmless gaseous products (CO2), liquid products (water), and organic-rich solid sludge. Excess sludge undergoes solid-liquid separation in a filter press, and is disinfected with ozone or chlorine to kill bacteria and viruses. Finally, activated carbon adsorption removes remaining pollutants, and the treated water is then sent to a reclaimed water system for reuse as circulating water. The treated industrial wastewater meets the emission limits specified in the revised "Emission Standard for Pollutants from Lead and Zinc Industries".

[0014] 6. The filter press device in this invention uses a filter bag installed inside the filter press chamber. Wastewater is passed into the filter bag, and a hydraulic cylinder pushes the filter press piston to shrink the filter bag. A first one-way valve at the inlet and a second one-way valve at the outlet allow water to pass through the filter bag and enter the oxidation disinfection tank. The filtered sludge remains in the filter bag. Once a certain amount of sludge is collected, the sludge outlet baffle is opened to remove it. This filter press device can adapt to the water treatment processes before and after this invention. It provides sufficient mixing tank for the reaction of chemicals and wastewater during the filter press stage, and sufficient oxidation disinfection tank for ozone oxidation during the filter press stage. Structurally, it abandons the traditional plate and frame filter press method, allowing the filter press device to be integrated with the overall structure of this invention. The innovative use of a filter press chamber, filter bag, and filter press piston meets the requirements of this invention's concept. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the filter press device described in this invention; Figure 3 This is a schematic diagram of the structure of the sewage tank described in this invention; Figure 4 This is a schematic diagram of the structure of the spraying device described in this invention; Figure 5 This is a schematic diagram of the adsorption tank described in this invention; Figure 6 This is a schematic diagram of the connection structure of the mud discharge baffle described in this invention; Figure 7 This is a schematic diagram of the other side of the mud discharge baffle described in this invention. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0017] like Figures 1-7As shown. A wastewater environmental protection treatment device includes, from top to bottom, a wastewater tank 2, a mixing tank 3, a filter press 4, an oxidation disinfection tank 5, a catalytic reaction tank 6, an adsorption tank 7, and a return water tank 8 arranged inside a housing 1. A wastewater pipe 9 is installed above the wastewater tank 2. Multiple mounting holes are arranged circumferentially at the bottom of the wastewater tank 2. A barrel-shaped sand filter screen 10 is installed inside the mounting holes and communicates with the mixing tank 3. A spray device is installed inside the mixing tank 3. The mixing tank 3 is connected to the inlet 11 of the filter press 4. The outlet 12 of the filter press 4 is connected to the oxidation disinfection tank 5. The oxidation disinfection tank 5 is connected to an ozone inlet device, and an exhaust valve 13 is installed on the oxidation disinfection tank 5. The oxidation disinfection tank 5 and the catalytic reaction tank 6 are connected by a first water channel. The first water channel 14 is connected to the first control valve 15. The catalyst inlet 16 is provided on the catalytic reaction tank 6. The stirring device is a stirrer 17, which is connected to the drive motor 18 via a drive shaft (the oxidation disinfection tank 5 and the catalytic reaction tank 6 are connected by an installation gap and supported by a support column, and the drive motor 18 is located in the installation gap). The catalytic reaction tank 6 and the adsorption tank 7 are connected through the second water channel 19. The second control valve 20 is provided on the second water channel 19. The adsorption tank 7 includes a bottom plate 43 and multiple adsorption columns 44 located on the bottom plate 43. The multiple adsorption columns 44 are arranged circumferentially and surround the bottom plate 43 to form the adsorption tank 7. The adsorption tank 7 is connected to the return water tank 8. The wastewater tank 2 is equipped with an annular grid cage 38. A barrel-shaped sand filter screen 10 is located outside the grid cage 38. A scraper reduction motor 39 is installed on the top of the outer shell 1. The output shaft of the scraper reduction motor 39 is connected to a rotating scraper 40 via a transmission shaft. The bottom of the rotating scraper 40 is slightly lower than the top of the grid cage 38. A slag storage tank 41 is installed on the outer side of the top of the grid cage 38, and a slag chute 42 is installed on the outer side of the slag storage tank 41. The wastewater tank 2 is separated from the mixing tank 3, the oxidation disinfection tank 5 from the catalytic reaction tank 6, and the catalytic reaction tank 6 from the adsorption tank 7 by partitions, and they are connected only by corresponding connecting structures. The bottom plate 43 is fixed to the outer shell 1 by multiple crossbeams 45.

[0018] Working principle: First, the collected sewage is removed by a scraper motor, reducer, and rotating scraper 40 to remove floating matter, large particles, and suspended solids from the surface of the sewage. When the water level in the sewage tank 2 is level with the grate cage 38, as the sewage surface rotates with the rotating scraper 40, the floating matter, large particles, and suspended solids overflow from the grate cage 38 into the slag storage tank 41, and are then discharged from the slag chute 42 for subsequent collection. Acidic wastewater from the sewage pipe 9 and sewage tank 2 is filtered through a barrel-shaped sand filter 10 and then enters the mixing tank 3 to mix with the chemical solution sprayed by the spraying device. It then enters the filter press 4 to separate the water from the sediment. Subsequently, it enters the oxidation disinfection tank 5 for ozone disinfection, and then enters the catalytic reaction tank 6 to add a catalyst to accelerate the ozone oxidation disinfection reaction. After completion, it enters the adsorption tank 7 for final adsorption treatment, thus completing the wastewater treatment. The process involves using water treatment agents to transform organic pollutants into harmless gaseous products (CO2), liquid products (water), and organic-rich solid sludge. Excess sludge undergoes solid-liquid separation in a filter press (4), and the separated water is disinfected with ozone or chlorine to kill bacteria and viruses. Finally, residual pollutants are removed using activated carbon adsorption, and the treated water is then sent to a reclaimed water system for reuse. The treated industrial wastewater meets the emission limits specified in the revised "Emission Standard for Pollutants from Lead and Zinc Industries".

[0019] The components include: Wastewater Tank: Serving as the wastewater inlet, it features a built-in barrel-shaped sand filter for preliminary filtration, removing large suspended particles. Mixing Tank: Receives the pre-filtered wastewater and adds water treatment agents via a spray system, ensuring thorough mixing and preparing for subsequent pollutant conversion. Filter Press: Achieves solid-liquid separation, pressing and separating the organic-rich sludge produced after mixing. The sludge is discharged separately, and the filtered water proceeds to the next stage. Oxidation and Disinfection Tank: Uses ozone as a disinfectant to kill bacteria and viruses in the water, while also assisting in the oxidation of some organic pollutants. Catalytic Reaction Tank: Adds a catalyst to significantly accelerate the ozone oxidation and disinfection reaction rate, improving pollutant degradation efficiency. Adsorption Tank: Employs activated carbon adsorption to remove residual trace pollutants from the water, achieving deep purification. Return Water Tank: Stores the final treated water, which can be sent to the greywater system for reuse as circulating water. Treatment Principle: Pollutant Conversion: After preliminary filtration, organic pollutants in the wastewater are converted into harmless gaseous products (CO2), liquid products (water), and solid sludge through the action of water treatment agents. Solid-Liquid Separation: Excess sludge is physically pressed in a filter press to achieve solid-liquid separation, avoiding secondary pollution from the sludge. Deep Disinfection: A combination of ozone (or chlorine) disinfection and catalytic oxidation provides dual protection to ensure that the microbial indicators of the water body meet the standards. Residual Purification: Utilizing the strong adsorption properties of activated carbon, residual trace pollutants in the water are removed, ensuring that the effluent quality meets the requirements for recycling.

[0020] The filter press device 4 includes a filter press housing 21, inside which is a filter press chamber 22. A filter bag 23 is installed inside the filter press chamber 22. An inlet 11 is located at the top of the filter press housing 21, and a first check valve 24 is installed at the inlet 11. An outlet 12 is located at the bottom of the filter press housing 21, and a second check valve 25 is installed at the outlet 12. One end of the filter press housing 21 has an openable sludge discharge baffle 26, and the other end has a hydraulic cylinder 27. The piston rod of the hydraulic cylinder 27 is located at the pressure... Inside the filter chamber 22, a filter press piston 28 is provided at the end of the piston rod. The part of the top of the filter bag 23 away from the filter press piston 28 is a fixed part 29, and the rest of the top of the filter bag 23 is a movable part 30. The fixed part 29 is fixed to the filter press housing 21. A water inlet 31 is opened on the filter bag 23 at the location of the fixed part 29. The water inlet 31 is connected to the water inlet 11. The opening 32 of the filter bag 23 faces the mud outlet baffle 26, and the outlet position of the filter bag 23 is fixed to the filter press housing 21.

[0021] When the filter press device 4 is in use, the sludge discharge baffle 26 is in the closed state. Water from the mixing tank 3 enters the filter bag 23 through the first one-way valve 24 at the inlet 11 until the filter bag 23 is full. At this time, the filter press piston 28 is located at the rightmost end of the filter press chamber 22. A sealing ring is provided on the outside of the filter press piston 28, which can seal the gap between the filter press piston 28 and the filter press housing 21. The hydraulic device is controlled to extend the piston rod of the hydraulic cylinder 27, and the filter press piston 28 pushes the filter bag 23 to contract, separating the water and sludge. The pressed water is discharged through the second one-way valve 25 at the outlet 12. Since the filter press piston 28 pushes the filter bag 23 to contract when the filter press piston 28 is at the rightmost end of the inlet 11, that is... The fixed part 29 and the movable part 30 are at the boundary position, so the entire filter bag 23 cannot be completely contracted during each filtration. Therefore, the filter bag 23 is always in a full state. When the filter press piston 28 retracts, as the filter press piston 28 moves, the water in the mixing tank 3 re-enters the filter bag 23 from the first one-way valve 24 of the inlet 11. During this process, the filter bag 23 is also in a full state. The filtration process can be repeated continuously. When the amount of mud in the filter bag 23 is large, the mud discharge baffle 26 is opened to remove the mud. The mud discharge baffle 26 is hinged to the end of the filter press housing 21, and a sealing gasket is provided between the mud discharge baffle 26 and the end of the filter press housing 21. The mud discharge baffle 26 is locked to the filter press housing 21 by a pin.

[0022] The ozone introduction device includes an ozone inlet pipe 33 installed on the side wall of the oxidation disinfection tank 5. The ozone inlet pipe 33 is connected to a distribution pipe 34, which is located in the oxidation disinfection tank 5. Multiple distribution holes are opened on the distribution pipe 34. The ozone source (ozone generator or storage tank) is connected to the ozone inlet pipe 33 through a pipe, and an ozone control valve is installed on the pipe.

[0023] The spraying device includes a dosing inlet pipe 35 installed on the side wall of the mixing tank 3, an annular guide pipe 36 installed inside the mixing tank 3, the annular guide pipe 36 being connected to the dosing inlet pipe 35, and multiple spray nozzles 37 distributed on the annular guide pipe 36. The agent source (agent storage tank) is connected to a delivery pump, a delivery pipeline and the dosing inlet pipe 35. The delivery pump pumps the agent into the annular guide pipe 36 and sprays it out from the multiple spray nozzles 37 to mix it evenly with the liquid in the mixing tank 3 in a timely manner.

[0024] The above are merely preferred embodiments of the present invention.

Claims

1. A wastewater environmental protection treatment device, characterized in that, The system includes, from top to bottom, a wastewater tank (2), a mixing tank (3), a filter press (4), an oxidation disinfection tank (5), a catalytic reaction tank (6), an adsorption tank (7), and a return water tank (8) inside the outer casing (1). A wastewater pipe (9) is installed above the wastewater tank (2). Multiple mounting holes are provided circumferentially at the bottom of the wastewater tank (2). A barrel-shaped sand filter screen (10) is installed inside the mounting holes. The inside of the barrel-shaped sand filter screen (10) is connected to the mixing tank (3). A spray device is installed inside the mixing tank (3). The mixing tank (3) is connected to the inlet (11) of the filter press (4). The outlet (12) of the filter press (4) is connected to the oxidation disinfection tank (8). The toxic tank (5) is connected, the oxidation disinfection tank (5) is connected to the ozone inlet device, and the oxidation disinfection tank (5) is equipped with an exhaust valve (13). The oxidation disinfection tank (5) and the catalytic reaction tank (6) are connected through the first water channel (14). The first water channel (14) is equipped with a first control valve (15). The catalytic reaction tank (6) is equipped with a catalyst inlet (16). The catalytic reaction tank (6) is equipped with a stirring device. The catalytic reaction tank (6) and the adsorption tank (7) are connected through the second water channel (19). The second water channel (19) is equipped with a second control valve (20). The adsorption tank (7) is connected to the return water tank (8).

2. A wastewater environmental protection treatment device according to claim 1, characterized in that, The filter press device (4) includes a filter press housing (21), inside which is a filter press chamber (22), and a filter bag (23) is installed inside the filter press chamber (22). The inlet (11) is located at the top of the filter press housing (21), and a first one-way valve (24) is installed at the inlet (11). The outlet (12) is located at the bottom of the filter press housing (21), and a second one-way valve (25) is installed at the outlet (12). One end of the filter press housing (21) is equipped with an openable mud discharge baffle (26), and the other end is equipped with a hydraulic cylinder (27). The piston rod of the hydraulic cylinder (27) is located at the pressure... Inside the filter chamber (22), a filter press piston (28) is provided at the end of the piston rod. The part of the top of the filter bag (23) away from the filter press piston (28) is the fixed part (29), and the rest of the top of the filter bag (23) is the movable part (30). The fixed part (29) is fixed to the filter press housing (21). A water inlet (31) is opened on the filter bag (23) at the location of the fixed part (29). The water inlet (31) is connected to the water inlet (11). The opening (32) of the filter bag (23) faces the mud outlet baffle (26), and the outlet position of the filter bag (23) is fixed to the filter press housing (21).

3. A wastewater environmental protection treatment device according to claim 1, characterized in that, The ozone inlet device includes an ozone inlet pipe (33) installed on the side wall of the oxidation disinfection tank (5), the ozone inlet pipe (33) being connected to a distribution pipe (34), the distribution pipe (34) being located in the oxidation disinfection tank (5), and multiple distribution holes being opened on the distribution pipe (34).

4. A wastewater environmental protection treatment device according to claim 1, characterized in that, The spraying device includes a dosing inlet pipe (35) provided on the side wall of the mixing tank (3), an annular guide pipe (36) provided inside the mixing tank (3), the annular guide pipe (36) being connected to the dosing inlet pipe (35), and multiple spray heads (37) distributed on the annular guide pipe (36).

5. A wastewater environmental protection treatment device according to claim 1, characterized in that, The sewage tank (2) is equipped with an annular fence cage (38), and a barrel-shaped sand filter screen (10) is located outside the fence cage (38). A scraper reduction motor (39) is installed on the top of the outer shell (1). The output shaft of the scraper reduction motor (39) is connected to a rotating scraper (40) through a transmission shaft. A slag storage tank (41) is installed on the outside of the top of the fence cage (38), and a slag chute (42) is installed on the outside of the slag storage tank (41).

6. A wastewater environmental protection treatment device according to claim 1, characterized in that, The adsorption tank (7) includes a bottom plate (43) and multiple adsorption columns (44) located on the bottom plate (43). The multiple adsorption columns (44) are arranged circumferentially and surround the bottom plate (43) to form the adsorption tank (7).

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