Multi-stage wastewater treatment device

Abstract

The invention relates to the technical field of wastewater treatment, in particular to a multistage treatment wastewater treatment device which comprises a bottom plate and the like, a pretreatment box, a chemical treatment box and a biological treatment box are arranged on the bottom plate, the pretreatment box is mounted on the top surface of the bottom plate through a support frame, and the upper part of the pretreatment box is communicated with a water inlet pipe and a first electromagnetic valve; the lower portion of the pretreatment box is communicated with the chemical treatment box through a first conveying pipe and a second electromagnetic valve, the chemical treatment box is communicated with the biological treatment box through a second conveying pipe and a first water pump, and a filter plate is fixedly connected to the middle of the pretreatment box. The biological treatment device is provided with components such as the heat conduction assembly, heat exchange is carried out between the heat conduction assembly and wastewater in the pretreatment box, so that the temperature of the wastewater is increased to the optimal temperature in chemical treatment, and the subsequent chemical reaction effect can be enhanced; the temperature of the wastewater is reduced, so that the optimal temperature for biological treatment is achieved, and the biodegradation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and particularly relates to a wastewater treatment device for multi-stage treatment. Background Art

[0002] Wastewater treatment refers to the process of purifying, treating, and recycling wastewater generated from activities such as industry, life, and agriculture. The purpose is to remove pollutants in the wastewater so that it meets certain standards for safe discharge into the environment or for recycling and reuse. Wastewater treatment not only helps protect the environment but also saves water resources and promotes sustainable development. In some small and medium-sized wastewater treatments, chemical treatment usually generates heat, causing the temperature of the wastewater to rise. After chemical treatment, biological treatment is carried out. The growth and degradation ability of microorganisms are sensitive to temperature. If the temperature of the wastewater exceeds the optimal working temperature range of some microorganisms, it may lead to the death of the organisms or a decrease in the degradation efficiency. Although existing technologies use cooling devices to lower the temperature of the wastewater, the energy consumption is usually relatively large and it is quite power-consuming. In view of this, the present invention proposes a wastewater treatment device for multi-stage treatment to solve the above-mentioned technical problems. Summary of the Invention

[0003] In order to overcome the technical problems mentioned in the background art, the present invention provides a wastewater treatment device for multi-stage treatment.

[0004] A wastewater treatment device for multi-stage treatment includes a bottom plate. A pretreatment tank, a chemical treatment tank, and a biological treatment tank are arranged on the bottom plate. The pretreatment tank is installed on the top surface of the bottom plate through a support frame. The upper part of the pretreatment tank is communicated with a water inlet pipe and a first solenoid valve. The lower part of the pretreatment tank is communicated with the chemical treatment tank through a first delivery pipe and a second solenoid valve. The chemical treatment tank is communicated with the biological treatment tank through a second delivery pipe and a first water pump. A filter plate is fixedly connected to the middle part inside the pretreatment tank. Below the filter plate, there is a heat conduction component for heat exchange with the wastewater. A partition plate is fixedly connected to the middle part inside the biological treatment tank. The partition plate divides the biological treatment tank into a water inlet area and a biological treatment area. There is a gap between the top of the partition plate and the inner top of the biological treatment tank. The chemical treatment tank is communicated with the water inlet area inside the biological treatment tank through a second delivery pipe and a first water pump. A heat conduction component is arranged in the water inlet area. A biological filter membrane is arranged in the biological treatment area. The bottom of the biological treatment area is communicated with a water outlet pipe. A drive shaft is rotatably connected inside the chemical treatment tank. The drive shaft is driven to rotate by a drive motor installed on the top of the chemical treatment tank. Stirring blades are fixedly connected to the drive shaft. The heat conduction component includes heat conduction cylinders fixedly connected to the inner side walls of the pretreatment tank and the side walls of the water inlet area. A heat conduction box is arranged inside the heat conduction cylinder. The heat conduction box is filled with a phase change material.

[0005] Further explanation: A flow-through groove for facilitating heat exchange of wastewater is provided in the middle of the heat-conducting cylinder. The heat-conducting box is adapted to the outer shape of the heat-conducting cylinder. A magnet is installed on the heat-conducting box, and the magnet is magnetically connected to the corresponding pretreatment tank or biological treatment tank. A handle for easy grasping is fixedly connected to one side of the heat-conducting box.

[0006] Further explanation: A cleaning component for cleaning the filter plate is installed in the pretreatment tank. The cleaning component includes a first rotating rod horizontally rotatably connected in the pretreatment tank and a second rotating rod vertically rotatably connected in the pretreatment tank. A paddle is fixedly connected to the first rotating rod, and the paddle is arranged directly below the water inlet pipe. A worm is fixedly connected to the first rotating rod, a worm gear meshing with the worm is fixedly connected to the second rotating rod, a cleaning block is fixedly connected to the bottom end of the second rotating rod, and the cleaning block is in contact with the top surface of the filter plate. A waste discharge port is provided on the side wall of the pretreatment tank, and a waste collection box is arranged in the waste discharge port.

[0007] Further explanation: A chemical dosing component for facilitating chemical dosing is provided in the chemical treatment tank. The chemical dosing component includes a fixed pipe fixedly connected to the inner top of the chemical treatment tank. The fixed pipe sleeves the upper end of the drive shaft. The fixed pipe is hollow and has a water flow hole at the lower end. A connecting block is fixedly connected to the upper end of the drive shaft, a sleeve box is fixedly connected above the connecting block, the sleeve box is hollow, the sleeve box is hermetically sleeved on the lower end of the fixed pipe, a ring-shaped water pipe is communicated with the outer wall of the sleeve box, a spray head is installed at the lower end of the ring-shaped water pipe, a second water pump is installed on the top of the chemical treatment tank, one end of the second water pump is communicated with the fixed pipe through a pipeline, and the other end is communicated with an external chemical reagent.

[0008] Further explanation: A tapered block is fixedly connected to the lower part inside the chemical treatment tank, a scraper matching with the tapered block is fixedly connected to the bottom end of the drive shaft, the opening of the tapered block is large at the top and small at the bottom, and one end of the tapered block is communicated with a sewage discharge pipe and a third solenoid valve.

[0009] Further explanation: It further includes a telescopic pipe. One end of the telescopic pipe is installed on the inner top of the chemical treatment tank and is communicated with the second delivery pipe. The other end of the telescopic pipe is fixedly connected with a water intake pipe. A floating ball is circumferentially fixedly connected to the top end of the water intake pipe. One ends of symmetrically arranged pull ropes are fixedly connected to the side wall of the water intake pipe. The other ends of the pull ropes are guided by a guide wheel installed on the top of the chemical treatment tank and are finally wound around a rope wheel rotatably connected to the top of the chemical treatment tank. A double-shaft motor is also installed on the top of the chemical treatment tank, and the output shaft of the double-shaft motor is fixedly connected with the rope wheel.

[0010] Further explanation: Filter holes are provided around the water intake pipe.

[0011] Further explanation: A sliding rod is slidably connected in the biological treatment area. The sliding rod is fixedly connected to the biological filtration membrane. An elastic member is provided between the sliding rod and the biological treatment tank. The second rotating rod penetrates through the pretreatment tank and extends to the lower part of the pretreatment tank. A first bevel gear is fixedly connected to the bottom of the second rotating rod. A fixed block is fixedly connected to the bottom of the biological treatment tank. A third rotating rod is rotatably connected to the fixed block. A second bevel gear meshing with the first bevel gear is fixedly connected to one end of the third rotating rod. A cam is fixedly connected to the other end of the third rotating rod. The cam abuts against the sliding rod.

[0012] The beneficial effects of the present invention are as follows: The present invention is provided with components such as a heat conduction component. Through heat exchange between the heat conduction component and the wastewater in the pretreatment tank, the temperature of the wastewater is raised to the optimal temperature in chemical treatment, thereby enhancing the subsequent chemical reaction effect. Before biological treatment in the biological treatment tank, heat exchange is carried out through the heat conduction component to reduce the wastewater temperature, thereby reaching the optimal temperature for biological treatment and improving the biological degradation efficiency. At the same time, by setting a time, the heat conduction box in the pretreatment tank and the heat conduction box in the biological treatment tank are swapped every certain period. In this way, using the phase change material avoids the need for additional heating or cooling of the wastewater, reduces the dependence on external energy sources, and reduces energy consumption and operating costs. Brief Description of the Drawings

[0013] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0014] Figure 2 is a cross-sectional view of components such as the pretreatment tank, the paddle, and the impurity collection box of the present invention. Figure 3 is an exploded view of components such as the heat conduction cylinder, the heat conduction box, and the magnet of the present invention.

[0015] Figure 4 is a cross-sectional view of components such as the chemical treatment tank, the stirring blade, and the conical block of the present invention.

[0016] Figure 5 is a cross-sectional view of components such as the annular water pipe, the fixed pipe, and the nozzle of the present invention.

[0017] Figure 6 is a schematic diagram of components such as the telescopic pipe, the water intake pipe, and the dual-axis motor of the present invention.

[0018] Figure 7 is a cross-sectional view of components such as the biological treatment tank, the biological filtration membrane, and the elastic member of the present invention.

[0019] Figure 8 is a schematic diagram of components such as the first bevel gear, the second bevel gear, and the cam of the present invention.

[0020] In the above figures: 101: bottom plate, 102: support frame, 103: pretreatment tank, 104: chemical treatment tank, 105: biological treatment tank, 106: water inlet pipe, 107: first conveying pipe, 108: second conveying pipe, 109: first water pump, 201: filter plate, 202: first rotating rod, 203: paddle, 204: second rotating rod, 205: worm, 206: worm gear, 207: cleaning block, 208: impurity collection box, 301: first bevel gear, 302: second bevel gear, 303: fixing block, 304: third rotating rod, 305: cam, 401: heat conducting cylinder, 4011: flow channel, 402: heat conducting box, 403: magnet, 501: drive shaft, 502: stirring blade, 503: scraping plate, 504: conical block, 505: drive motor, 506: sewage discharge pipe, 601: second water pump, 602: fixing pipe, 603: sleeve box, 604: connecting block, 605: annular water pipe, 606: nozzle, 701: telescopic pipe, 702: water intake pipe, 703: floating ball, 704: pulling rope, 705: guide pulley, 706: rope pulley, 707: double-shaft motor, 801: biological filtration membrane, 802: sliding rod, 803: elastic member, 804: partition board, 805: water outlet pipe. Detailed implementation manner

[0021] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which the currently preferred embodiments of the invention are shown. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and fully convey the scope of the invention to those skilled in the art.

[0022] A wastewater treatment device for multi-stage treatment, as Figures 1-8 shown, includes a bottom plate 101. A pretreatment tank 103, a chemical treatment tank 104, and a biological treatment tank 105 are arranged on the bottom plate 101. The pretreatment tank 103 is installed on the top surface of the bottom plate 101 through a support frame 102, and the chemical treatment tank 104 and the biological treatment tank 105 are installed on the top surface of the bottom plate 101. The upper part of the pretreatment tank 103 is communicated with a water inlet pipe 106 and a first solenoid valve. The lower part of the pretreatment tank 103 is communicated with the chemical treatment tank 104 through a first conveying pipe 107 and a second solenoid valve. The chemical treatment tank 104 is communicated with the biological treatment tank 105 through a second conveying pipe 108 and a first water pump 109. In this way, the wastewater can be pre-treated through the pretreatment tank 103, chemically treated through the chemical treatment tank 104, and biologically treated through the biological treatment tank 105. Through the combination of these three different treatment methods, various pollutants in the wastewater can be comprehensively and effectively removed, ensuring that the final water quality meets the discharge standard or the reuse standard; Specifically, a filter plate 201 is fixedly connected to the middle inside the pretreatment tank 103. Through the filter plate 201, solid particles in the wastewater can be removed. A heat conduction component for heat exchange with the wastewater is arranged below the filter plate 201. A partition plate 804 is fixedly connected to the middle inside the biological treatment tank 105. The partition plate 804 divides the biological treatment tank 105 into a water inlet area and a biological treatment area. As Figure 7 shown, the left side of the partition plate 804 is the water inlet area, and the right side of the partition plate 804 is the biological treatment area. There is a gap between the top of the partition plate 804 and the top inside the biological treatment tank 105. The chemical treatment tank 104 is communicated with the water inlet area inside the biological treatment tank 105 through a second delivery pipe 108 and a first water pump 109. A heat conduction component is arranged in the water inlet area, and a biological filter membrane 801 is arranged in the biological treatment area. A water outlet pipe 805 is communicated with the bottom of the biological treatment area. A drive shaft 501 is rotatably connected inside the chemical treatment tank 104. The drive shaft 501 is driven by a drive motor 505 installed on the top of the chemical treatment tank 104 to rotate. Stirring blades 502 are fixedly connected to the drive shaft 501; In some small and medium-sized wastewater treatments, chemical treatment is usually accompanied by heat release, which causes the temperature of the wastewater to rise. After chemical treatment, biological treatment is carried out. The growth and degradation ability of microorganisms are relatively sensitive to temperature. If the temperature of the wastewater exceeds the optimal working temperature range of some microorganisms, it may lead to the death of the organisms or a decrease in the degradation efficiency. Although the prior art uses cooling devices to reduce the temperature of the wastewater, the energy consumption is usually relatively large and it is quite power-consuming. However, this device can solve the above problems. During specific use, the water inlet speed of the water inlet pipe 106 can be controlled by the first solenoid valve, and the water delivery speed of the first delivery pipe 107 can be controlled by the second solenoid valve. In this way, normal-temperature wastewater (about 24 degrees Celsius) enters the pretreatment tank 103 through the water inlet pipe 106 and is filtered by the filter plate 201. The filter plate 201 filters out large-particle impurities or solid impurities in the wastewater. Then the filtered wastewater falls to the lower part inside the pretreatment tank 103. By controlling the water inflow and outflow speeds through the first solenoid valve and the second solenoid valve, the liquid level is always between the heat conduction component and the partition plate 804. The heat conduction component exchanges heat with the wastewater. The heat conduction component releases heat, causing the temperature of the wastewater to rise to the optimal temperature in chemical treatment (about 30 degrees Celsius), thereby enhancing the subsequent chemical reaction effect. Then the wastewater is transported to the chemical treatment tank 104 through the first delivery pipe 107 for chemical treatment. Chemical reagents are added to the chemical treatment tank 104, and then a chemical reaction occurs, causing the temperature of the wastewater to rise. The heated wastewater is transported to the water inlet area in the biological treatment tank 105 through the second delivery pipe 108 and the first water pump 109. The wastewater accumulates in the water inlet area, and the water level gradually rises. Then the water level will overflow the partition plate 804 and reach the biological treatment area. During this period, the heat conduction component in the water inlet area exchanges heat with the wastewater in the water inlet area. The heat conduction component in the water inlet area absorbs heat, causing the temperature of the wastewater to decrease, and then reaching the optimal temperature for biological treatment (about 35 degrees Celsius), improving the biological degradation efficiency, and then accelerating the biological purification process of the wastewater. After the water level overflows the partition plate 804, the final filtration is completed through the biological filter membrane 801, and finally the purified wastewater is discharged through the water outlet pipe 805. Specifically, the heat conduction component includes a heat conduction cylinder 401 fixedly connected to the inner side wall of the pretreatment tank 103 and the side wall of the water inlet area. A heat conduction box 402 is arranged inside the heat conduction cylinder 401, and the heat conduction box 402 is filled with a phase change material.Both the heat-conducting cylinder 401 and the heat-conducting box 402 are made of copper. The surface of the heat-conducting cylinder 401 is treated to prevent corrosion and oxidation. The phase-change material is specifically paraffin. Before use, the paraffin is first heated to the phase-change temperature to turn it into a liquid state. Then, the melted paraffin is poured into the heat-conducting box 402 and allowed to cool naturally. In this way, a heat-conducting component capable of heat exchange with the wastewater can be obtained. When the temperature of the wastewater is higher than the phase-change temperature, the paraffin will absorb heat and change from a solid state to a liquid state, thereby reducing the temperature of the wastewater. When the temperature of the wastewater is lower than the phase-change temperature, the paraffin will release heat and re-solidify into a solid state, thereby increasing the temperature of the wastewater. There are two flow channels 4011 in the middle of the heat-conducting cylinder 401 to facilitate heat exchange of the wastewater. The shape of the heat-conducting box 402 is adapted to that of the heat-conducting cylinder 401. The design of the flow channels 4011 can increase the contact area between the heat-conducting cylinder 401 and the wastewater, enabling the wastewater to have more contact opportunities with the heat-conducting component, thereby improving the efficiency of heat transfer and promoting the heat exchange of the phase-change material. For example, in the pretreatment tank 103, the temperature of the wastewater is lower than the phase-change temperature of the paraffin, causing the paraffin to release heat and solidify into a solid state, and transfer the heat to the heat-conducting box 402. The heat-conducting box 402 releases heat and transfers the heat to the wastewater. In the biological treatment tank 105, the temperature of the wastewater is higher than the phase-change temperature of the paraffin, and the paraffin absorbs heat. Then, the temperature of the wastewater is transferred to the paraffin through the heat-conducting cylinder 401 and the heat-conducting box 402, causing the paraffin to change from a solid state to a liquid state. A magnet 403 is installed on the heat-conducting box 402, and the magnet 403 is magnetically connected to the corresponding pretreatment tank 103 or biological treatment tank 105. A handle for easy grasping is fixedly connected to one side of the heat-conducting box 402, so that it is convenient for the staff to take and place the heat-conducting box 402. In this way, by setting a time, the heat-conducting box 402 in the pretreatment tank 103 and the heat-conducting box 402 in the biological treatment tank 105 can be exchanged every certain period. In this way, using the phase-change material avoids the need for additional heating or cooling of the wastewater, reduces the dependence on external energy, and lowers the energy consumption and operating costs.,

[0023] Further, a cleaning component for cleaning the filter plate 201 is installed in the pretreatment tank 103. The cleaning component includes a first rotating rod 202 horizontally rotatably connected in the pretreatment tank 103 and a second rotating rod 204 vertically rotatably connected in the pretreatment tank 103. A paddle 203 is fixedly connected to the outer circumference of the first rotating rod 202. The paddle 203 is arranged directly below the water inlet pipe 106. When the wastewater flows into the pretreatment tank 103 from the water inlet pipe 106, the gravitational potential energy of the wastewater is utilized to drive the paddle 203 to rotate. A worm 205 is fixedly connected to the first rotating rod 202, and a worm gear 206 meshing with the worm 205 is fixedly connected to the second rotating rod 204. A cleaning block 207 is fixedly connected to the bottom end of the second rotating rod 204. The cleaning block 207 is in contact with the top surface of the filter plate 201. The cleaning block 207 is specifically a brush. A waste discharge port is arranged on the side wall of the pretreatment tank 103, and a waste collection box 208 is arranged in the waste discharge port. A notch is arranged at a section of the filter plate 201 close to the waste collection box 208, and the height of the filter plate 201 is flush with the height of the waste collection box 208. In this way, the cleaning block 207 can clean the solid impurities into the waste collection box 208. It can be seen that when the wastewater flows into the pretreatment tank 103 from the water inlet pipe 106, the gravitational potential energy of the wastewater is utilized to drive the paddle 203 to rotate. Then, the paddle 203 drives the first rotating rod 202 to rotate. The worm 205 on the first rotating rod 202 drives the worm gear 206 to rotate through meshing transmission. Then, the worm gear 206 drives the second rotating rod 204 and the cleaning block 207 to rotate. Then, the cleaning block 207 can clean the solid impurities filtered out by the filter plate 201 into the waste collection box 208, preventing the filter plate 201 from being blocked.

[0024] Furthermore, a chemical dosing assembly for facilitating chemical dosing is provided inside the chemical treatment tank 104. The chemical dosing assembly includes a fixed pipe 602 fixedly connected to the inner top of the chemical treatment tank 104. The fixed pipe 602 is sleeved on the upper end of the drive shaft 501. The fixed pipe 602 is hollow and has water flow holes provided at its lower end. A connecting block 604 is fixedly connected to the upper end of the drive shaft 501. A sleeve box 603 is fixedly connected above the connecting block 604. The sleeve box 603 is hollow. The sleeve box 603 is sealingly sleeved on the lower end of the fixed pipe 602 and wraps the water flow holes therein. An annular water pipe 605 is communicated with the outer wall of the sleeve box 603. A spray head 606 is installed at the lower end of the annular water pipe 605. A second water pump 601 is installed on the top of the chemical treatment tank 104. One end of the second water pump 601 is communicated with the fixed pipe 602 through a pipeline, and the other end is communicated with an external chemical reagent. It can be seen therefrom that the external chemical reagent is transported into the fixed pipe 602 by the second water pump 601. The chemical reagent in the fixed pipe 602 flows into the sleeve box 603 through the water flow holes, is transported to the spray head 606 through the annular water pipe 605, and then is sprayed out by the spray head 606. At the same time, since the connecting block 604 is fixedly connected to the drive shaft 501, when the drive shaft 501 rotates, it will drive the connecting block 604 to rotate, which will further drive the sleeve box 603 to rotate, and then drive the spray head 606 to rotate, thus realizing uniform chemical dosing. At the same time, with the stirring of the stirring blades 502, the mixing efficiency of the chemical reagent and the wastewater can be improved, making the chemical reaction more uniform and thorough. The chemical reagent reacts with some elements in the wastewater, and through the superimposed heat release of multiple chemical reactions, the temperature of the wastewater will increase. For example, first, a neutralization reaction between a strong acid (such as sulfuric acid) and a strong base (such as sodium hydroxide) releases heat, and then a Fenton reagent is introduced to catalytically oxidize organic matter. The superimposed heat release effects of the two reactions cause a significant increase in the temperature of the wastewater.

[0025] Furthermore, in some chemical reactions, some metal oxide precipitates may be generated. If the precipitates cannot be effectively treated, it will increase the burden on the equipment. A conical block 504 is fixedly connected to the lower part inside the chemical treatment tank 104. A scraper 503 that cooperates with the conical block 504 is fixedly connected to the bottom end of the drive shaft 501. The opening of the conical block 504 is larger at the top and smaller at the bottom. One end of the conical block 504 is connected to a sewage discharge pipe 506 and a third solenoid valve. There is also a telescopic pipe 701. One end of the telescopic pipe 701 is installed at the top inside the chemical treatment tank 104 and is connected to the second delivery pipe 108. The other end of the telescopic pipe 701 is fixedly connected to a water intake pipe 702. Filter holes are provided around the water intake pipe 702. A floating ball 703 is circumferentially fixedly connected to the top end of the water intake pipe 702. One end of a pull rope 704 is symmetrically fixedly connected to the side wall of the water intake pipe 702. The other end of the pull rope 704 is guided by a guide wheel 705 installed on the top of the chemical treatment tank 104 and is finally wound around a rope wheel 706 rotatably connected to the top of the chemical treatment tank 104. A dual-axis motor 707 is also installed on the top of the chemical treatment tank 104. The output shaft of the dual-axis motor 707 is fixedly connected to the rope wheel 706. It can be seen from this that the conical block 504 is arranged with an opening that is larger at the top and smaller at the bottom to help concentrate the precipitates. Then, as the scraper 503 rotates, the precipitates will be effectively taken out from the conical block 504 and finally discharged through the sewage discharge pipe 506. Through the cooperation of the dual-axis motor 707 and the rope wheel 706, the pull rope 704 can control the height of the water intake pipe 702. After the stirring blades 502 finish stirring, the dual-axis motor 707 controls the rope wheel 706 to rotate, making the pull rope 704 loose. Then, the water intake pipe 702 moves downward under the action of gravity, and thus the water intake pipe 702 enters the waste liquid. At the same time, due to the action of the floating ball 703, the water intake pipe 702 is always in the upper layer of the waste water to take water. At this time, the first water pump 109 is started, and thus the waste water in the chemical treatment tank 104 can be pumped and transported to the biological treatment tank 105 through the second delivery pipe 108 for biological treatment. At the same time, since filter holes are provided around the water intake pipe 702, it can prevent the inhalation of precipitates.

[0026] Furthermore, a sliding rod 802 is slidably connected in the biological treatment area. The sliding rod 802 is fixedly connected to the biological filtration membrane 801. An elastic member 803 is arranged between the sliding rod 802 and the biological treatment tank 105. The elastic member 803 is specifically a spring. The second rotating rod 204 penetrates through the pretreatment tank 103 and extends to the lower part of the pretreatment tank 103. A first bevel gear 301 is fixedly connected to the bottom of the second rotating rod 204. A fixed block 303 is fixedly connected to the bottom of the biological treatment tank 105. A third rotating rod 304 is rotatably connected to the fixed block 303. A second bevel gear 302 meshing with the first bevel gear 301 is fixedly connected to one end of the third rotating rod 304. A cam 305 is fixedly connected to the other end of the third rotating rod 304. The cam 305 abuts against the sliding rod 802. It can be seen from this that when the second rotating rod 204 rotates, the second rotating rod 204 will drive the first bevel gear 301 to rotate. Furthermore, the first bevel gear 301 drives the second bevel gear 302 to rotate through meshing transmission, and then drives the third rotating rod 304 and the cam 305 to rotate. The cam 305 abuts against the sliding rod 802, thereby causing the biological filtration membrane 801 to vibrate up and down. In this way, it can help the membrane surface to better contact the wastewater, so as to accelerate the adsorption, decomposition and removal of harmful substances in the wastewater.

[0027] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A multi-stage wastewater treatment device, characterized in that: The invention comprises a bottom plate (101), on which a pretreatment box (103), a chemical treatment box (104) and a biological treatment box (105) are arranged; the pretreatment box (103) is installed on the top surface of the bottom plate (101) via a support frame (102); the upper part of the pretreatment box (103) is connected to a water inlet pipe (106) and a first electromagnetic valve; the lower part of the pretreatment box (103) is connected to the chemical treatment box (104) via a first delivery pipe (107) and a second electromagnetic valve. The chemical treatment box (104) is connected to the biological treatment box (105) through the second delivery pipe (108) and the first water pump (109); a filter plate (201) is fixedly connected to the middle of the pretreatment box (103); a heat conduction component for heat exchange with the wastewater is arranged below the filter plate (201); a partition plate (804) is fixedly connected to the middle of the biological treatment box (105); the partition plate (804) separates the biological treatment box (105) into an inlet and an outlet. A pretreatment zone and a biological treatment zone are provided, a gap is provided between the top of the partition (804) and the top of the biological treatment box (105), the chemical treatment box (104) is connected to the water inlet zone in the biological treatment box (105) through a second delivery pipe (108) and a first water pump (109), a heat conduction component is provided in the water inlet zone, a biological filtration membrane (801) is provided in the biological treatment zone, a water outlet pipe (805) is connected to the bottom of the biological treatment zone, a drive shaft (501) is rotatably connected in the chemical treatment box (104), the drive shaft (501) is driven by a drive motor (505) installed on the top of the chemical treatment box (104) to achieve rotation, and a stirring blade (502) is fixedly connected to the drive shaft (501); the heat conduction component comprises a heat conduction cylinder (401) fixedly connected to the inner side wall of the pretreatment box (103) and the side wall of the water inlet zone, a heat conduction box (402) is provided in the heat conduction cylinder (401), and a phase change material is filled in the heat conduction box (402).

2. A multi-stage wastewater treatment device according to claim 1, characterized in that: A circulation groove (4011) is provided in the middle of the heat-conducting tube (401) for facilitating heat exchange of wastewater. The heat-conducting box (402) is adapted to the shape of the heat-conducting tube (401). A magnet (403) is mounted on the heat-conducting box (402). The magnet (403) is magnetically connected to a corresponding pretreatment box (103) or a biological treatment box (105). A handle for easy grasping is fixed to one side of the heat-conducting box (402).

3. A multi-stage wastewater treatment device according to claim 2, characterized in that: A cleaning assembly for cleaning the filter plate (201) is installed in the pretreatment box (103), and the cleaning assembly comprises a first rotating rod (202) connected to the pretreatment box (103) in a transversely rotatable manner and a second rotating rod (204) connected to the pretreatment box (103) in a vertically rotatable manner. A paddle (203) is fixedly connected to the upper surface of the first rotating rod (202), and the paddle (203) is arranged directly below the water inlet pipe (106). A worm (205) is fixedly connected to the first rotating rod (202), and a worm wheel (206) meshing with the worm (205) is fixedly connected to the second rotating rod (204). A cleaning block (207) is fixedly connected to the bottom end of the second rotating rod (204), and the cleaning block (207) is in contact with the top surface of the filter plate (201). A debris discharge port is arranged on the side wall of the pretreatment box (103), and a debris collection box (208) is arranged in the debris discharge port.

4. A multi-stage wastewater treatment device according to claim 3, characterized in that: A dosing assembly for facilitating dosing is arranged in the chemical treatment box (104), and the dosing assembly comprises a fixed pipe (602) fixedly connected to the top of the chemical treatment box (104), the fixed pipe (602) being sleeved on the upper end of the driving shaft (501), the fixed pipe (602) being hollow and having a water flow hole at the lower end, a connecting block (604) being fixedly connected to the upper end of the driving shaft (501), a sleeve box (603) being fixedly connected above the connecting block (604), the sleeve box (603) being hollow, and being sealedly sleeved on the lower end of the fixed pipe (602), an annular water pipe (605) being connected to the outer wall of the sleeve box (603), a nozzle (606) being installed at the lower end of the annular water pipe (605), and a second water pump (601) being installed at the top of the chemical treatment box (104), one end of the second water pump (601) being connected to the fixed pipe (602) through a pipeline, and the other end being connected to an external chemical reagent.

5. A multi-stage wastewater treatment device according to claim 4, characterized in that: A conical block (504) is fixedly connected to the lower part of the chemical treatment box (104); a scraper (503) matching the conical block (504) is fixedly connected to the bottom end of the drive shaft (501); the opening of the conical block (504) is larger at the top and smaller at the bottom; one end of the conical block (504) is connected to a sewage pipe (506) and a third solenoid valve.

6. A multi-stage wastewater treatment device according to claim 5, characterized in that: It also includes a telescopic tube (701), one end of which is mounted on the top of the chemical treatment box (104) and communicated with the second delivery tube (108), the other end of which is fixedly connected to a water intake pipe (702), the top of which is circumferentially fixedly connected to a float (703), one end of a pull rope (704) is symmetrically fixedly connected to the side wall of the water intake pipe (702), the other end of which is guided by a guide wheel (705) mounted on the top of the chemical treatment box (104) and finally wound around a rope wheel (706) rotatably connected to the top of the chemical treatment box (104), and a double-axis motor (707) is also mounted on the top of the chemical treatment box (104), the output shaft of the double-axis motor (707) is fixedly connected to the rope wheel (706).

7. A multi-stage wastewater treatment device according to claim 6, characterized in that: Filter holes are arranged around the water intake pipe (702).

8. A multi-stage wastewater treatment device according to claim 7, characterized in that: A sliding rod (802) is slidably connected in the biological treatment area, the sliding rod (802) is fixedly connected to the biological filtration membrane (801), an elastic member (803) is arranged between the sliding rod (802) and the biological treatment box (105), a second rotating rod (204) passes through the pretreatment box (103) and extends to the lower part of the pretreatment box (103), a first bevel gear (301) is fixedly connected to the bottom of the second rotating rod (204), a fixed block (303) is fixedly connected to the bottom of the biological treatment box (105), a third rotating rod (304) is rotatably connected to the fixed block (303), one end of the third rotating rod (304) is fixedly connected to the second bevel gear (302) meshing with the first bevel gear (301), the other end of the third rotating rod (304) is fixedly connected to a cam (305), and the cam (305) is in contact with the sliding rod (802).

Images