Waste water treatment device for recycling asphalt

Abstract

The application discloses a wastewater treatment device for recycling asphalt, and relates to the technical field of wastewater treatment, which comprises an aeration tank and a sedimentation tank. The aeration tank comprises a box body, an aeration mechanism and a salvage mechanism. The sedimentation tank comprises a tank body, a tank cover and a cleaning mechanism. The aeration mechanism continuously stirs and mixes wastewater, activated sludge and air bubbles by using stirring plates on outer rotating rods, improves the activity of microorganisms, thereby improving the ability of microorganisms to degrade organic matter through adsorption and metabolic action, and purifying wastewater. The salvage mechanism salvages and removes oil substances and suspended solids in sewage, effectively improves the efficiency of microorganisms in degrading organic matter, and separates and processes oil substances in the sewage. The cleaning mechanism converts wind energy into mechanical energy to drive the cleaning mechanism to clean sludge in the sedimentation tank, and changes the pressure to re-transport activated sludge in the sedimentation tank back to the aeration tank for continuous reaction, thereby saving manpower, material resources and energy consumption.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically, to a wastewater treatment device for recycled asphalt. Background Technology

[0002] Wastewater from recycled asphalt production often contains organic pollutants such as benzene compounds, polycyclic aromatic hydrocarbons (PAHs), phenols, and aldehydes. These substances are highly toxic, carcinogenic, and bioaccumulative. If directly discharged into water bodies, they can lead to the death of aquatic organisms, eutrophication, and even enter the human body through the food chain, endangering human health.

[0003] When treating asphalt production wastewater, it is necessary to combine a "pretreatment-biological treatment-deep treatment" process based on its characteristics of high concentration of organic matter, oil, heavy metals and suspended solids. The appropriate technology should be selected according to the water quality characteristics. The core link of wastewater treatment is the biological treatment stage. The usual method is to use an aeration tank to fully mix microorganisms (activated sludge) with the wastewater. The microorganisms decompose organic matter and form flocculent sludge. The sludge-water mixture is then transported to a sedimentation tank to separate the water and sludge.

[0004] However, traditional devices still have the following problems when in use:

[0005] 1. Traditional aeration tanks typically have aeration devices installed at the bottom. During aeration, the gas is gradually consumed as it rises, resulting in a high gas content at the bottom and a low gas content at the surface. Microorganisms near the surface cannot receive air, thus weakening their ability to degrade organic matter and reducing the overall degradation efficiency of the aeration tank.

[0006] 2. When asphalt wastewater is aerated, the oily substances in the asphalt wastewater react with the chemical substances in the pool water, producing a large amount of foam and impurities, which need to be cleaned.

[0007] 3. After the wastewater is separated in the sedimentation tank, the sludge in the sedimentation tank needs to be transported back to the aeration tank by manual means to continue the reaction, which is time-consuming and labor-intensive. Summary of the Invention

[0008] In view of the problems existing in the prior art, the purpose of the present invention is to provide a wastewater treatment device for recycled asphalt, which solves the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention employs the following technical solution.

[0010] A wastewater treatment device for recycled asphalt includes an aeration tank and a sedimentation tank. The aeration tank includes a box body, and the sedimentation tank includes a tank body and a tank cover. A drive motor and an air pump are fixed on the outer wall of the box body. An aeration mechanism is provided inside the box body, and a retrieval mechanism is provided on the upper part of the aeration mechanism.

[0011] The aeration mechanism includes an inner rotating rod and an outer rotating rod, both of which are hollow rods. The outer rotating rod is sleeved on the inner rotating rod, and the inner rotating rod is slightly longer than the outer rotating rod. The two ends of the outer rotating rod are provided with rotating grooves. A rotating block is fixed on the inner rotating rod at the position corresponding to the rotating groove. Multiple stirring plates are fixedly connected to the outer rotating rod, and the multiple stirring plates are arranged in three rows at equal intervals on the outer rotating rod. Multiple vent holes are opened on the stirring plates. A through hole one is opened on the outer rotating rod, and the through hole one communicates with the vent holes. A through hole two is opened on the inner rotating rod at the position corresponding to the through hole one.

[0012] Preferably, one end of the inner rotating rod extends through to the outside of the housing and is fixedly connected to a synchronous pulley one. A synchronous belt is fitted on the synchronous pulley one. The output end of the drive motor is fixedly connected to a synchronous pulley two. The other end of the synchronous belt is fitted on the synchronous pulley two. The drive motor can drive the inner rotating rod to rotate through the synchronous pulley one, the synchronous pulley two and the synchronous belt.

[0013] Preferably, both ends of the inner rotating rod penetrate the box body. One end of the inner rotating rod is rotatably connected to the air pump, and the other end of the inner rotating rod is rotatably connected to an air supply pipe. The air supply pipe is connected to the tank cover and is equipped with a valve one. A drain pipe is opened on the surface of the tank body and is equipped with a valve four. The box body is connected to the tank body through a water supply pipe and is equipped with a valve two. A cleaning mechanism is installed inside the tank body. A mud supply pipe is fixedly connected to the bottom of the tank body, and the other end of the mud supply pipe is connected to the box body. A valve three is installed on the mud supply pipe.

[0014] Preferably, the salvage mechanism includes a counterweight rod, which is a semi-cylindrical structure. Slider blocks are provided at both ends of the counterweight rod. A sliding groove is provided on the inner wall of the box, which is located directly above the aeration mechanism. The sliders are inserted into the sliding groove. Multiple pin plates are fixed at equal intervals on the upper surface of the counterweight rod. Each pin plate is hinged to two connecting rods. The other end of the connecting rod is hinged to the bottom of the float plate. The surface of the float plate is fitted with a lint sleeve.

[0015] Preferably, a collection box is fixed on the inner wall of the box, and the opening of the collection box is serrated to scrape off and collect the foam on the surface of the float.

[0016] Preferably, the cleaning mechanism includes a rotating shaft rotatably connected to the tank body. Fan blades are equidistantly arranged on the upper circumference of the rotating shaft. A partition is fixed above the tank body, and the rotating shaft passes through the partition. A cavity is formed inside the tank cover, and the fan blades are located within the cavity. An air supply pipe passes through the tank cover and communicates with the cavity. A ventilation groove is formed in the partition and is connected to the air supply pipe. Multiple T-shaped rods are fixedly connected to the lower end of the rotating shaft. The T-shaped rods are inclined, and a brush is fixedly connected to the lower end of each T-shaped rod. When the rotating shaft rotates, it drives the T-shaped rods to rotate, and the brush sweeps the sludge at the bottom of the tank towards the center of the tank bottom. The sludge is swept into a sludge discharge trough, which is connected to the sludge supply pipe.

[0017] Preferably, a filter screen is fixed at the connection port between the water supply pipe and the tank. The filter screen can filter out larger sand and impurities in the sewage, allowing activated sludge and wastewater to pass through.

[0018] Preferably, an air valve is provided at the end of the ventilation pipe, a valve is provided on the mud conveying pipe, and a drain pipe is opened on the surface of the tank, with a valve provided on the drain pipe.

[0019] Preferably, the outer rotating rod has an installation groove, on which a spraying mechanism is installed. The spraying mechanism includes a housing, a sliding plate is slidably connected to the bottom of the housing, and a nozzle is fixedly connected to the upper part of the housing. The nozzle is a one-way nozzle, and the housing is filled with a pesticide.

[0020] Preferably, the mounting groove is located between adjacent stirring plates. When the drive motor reverses, the rotating block rotates to the other end of the rotating groove, and the through hole of the inner rotating rod moves to the direct below the spraying mechanism. When the air pump is turned on, the air pushes the sliding plate upward, squeezing the agent in the housing and spraying it out from the nozzle.

[0021] Compared with the prior art, the advantages of this invention are:

[0022] (1) By setting up an aeration mechanism, air is discharged from the exhaust hole on the stirring plate to generate tiny bubbles in the water. At the same time, the stirring plate on the outer rotating rod continuously stirs and mixes the wastewater, activated mud and bubbles, thereby improving the activity of microorganisms and enhancing their ability to degrade organic matter through adsorption and metabolism, thus purifying the wastewater.

[0023] (2) By setting up a retrieval mechanism, the present invention utilizes the continuous rotation of the stirring plate in the aeration mechanism to drive the retrieval mechanism to move, thereby retrieval and removal of petroleum substances and suspended solids in sewage, effectively improving the efficiency of microbial degradation of organic matter, and separating oil substances in sewage.

[0024] (3) The present invention sets up a cleaning mechanism, which converts wind energy into mechanical energy to drive the cleaning mechanism to clean the sludge in the sedimentation tank, and then transports the activated sludge in the sedimentation tank back to the aeration tank to continue the reaction by changing the pressure.

[0025] (4) The present invention utilizes the relative rotation of the inner and outer rotating rods in the aeration mechanism to realize the opening and closing of the aeration, spraying and cleaning mechanisms, saving manpower, material resources and energy consumption. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 3 This is a front view of the device of the present invention;

[0029] Figure 4 This is a schematic diagram of the overall structure of the aeration tank of the present invention;

[0030] Figure 5 This is a schematic diagram of the aeration mechanism of the present invention;

[0031] Figure 6 This is a schematic diagram of the salvage mechanism of the present invention;

[0032] Figure 7 This is a schematic diagram showing the positional relationship between the aeration mechanism and the retrieval mechanism of the present invention;

[0033] Figure 8 This is a schematic diagram of the operation of the salvage mechanism of the present invention;

[0034] Figure 9 This is a schematic diagram of the deposition tank structure of the present invention;

[0035] Figure 10 This is a schematic diagram of the cleaning mechanism structure of the present invention;

[0036] Figure 11 This is a schematic diagram of the spraying mechanism of the present invention.

[0037] Explanation of the labels in the diagram:

[0038] 1. Aeration tank; 11. Box body; 12. Aeration mechanism; 121. Inner rotating rod; 122. Outer rotating rod; 123. Rotating groove; 124. Rotating block; 125. Mixing plate; 126. Exhaust hole; 127. Through hole one; 128. Through hole two; 129. Mounting groove; 13. Retrieval mechanism; 131. Counterweight rod; 132. Sliding block; 133. Slide groove; 134. Pin plate; 135. Connecting rod; 136. Float plate; 14. Collection box; 15. Air pump; 16. Drive motor; 2. Sedimentation tank; 21. Tank body; 22. Tank cover; 23. Cleaning mechanism; 231. Rotating shaft; 232. Fan blade; 233. T-shaped rod; 234. Brush; 24. Baffle plate; 25. Cavity; 26. Ventilation groove; 27. Sludge discharge groove; 3. Air supply pipe; 31. Valve 1; 4. Water supply pipe; 41. Valve 2; 5. Sludge supply pipe; 51. Valve 3; 6. Synchronous belt; 7. Drainage pipe; 71. Valve 4; 8. Spraying mechanism; 81. Shell; 82. Slide plate; 83. Nozzle. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0040] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] Example

[0043] Please see Figures 1-11A wastewater treatment device for recycled asphalt includes an aeration tank 1 and a sedimentation tank 2. The aeration tank 1 includes a box body 11, and the sedimentation tank 2 includes a tank body 21 and a tank cover 22. A drive motor 16 and an air pump 15 are fixed on the outer wall of the box body 11. An aeration mechanism 12 is provided inside the box body 11. A retrieval mechanism 13 is provided on the upper part of the aeration mechanism 12. A collection box 14 is fixed on the inner wall of the box body 11.

[0044] The aeration mechanism 12 includes an inner rotating rod 121 and an outer rotating rod 122, both of which are hollow rods. The outer rotating rod 122 is sleeved on the inner rotating rod 121, and the inner rotating rod 121 is slightly longer than the outer rotating rod 122. One end of the inner rotating rod 121 extends through to the outside of the housing 11 and is fixedly connected to a synchronous pulley 1. A synchronous belt 6 is sleeved on the synchronous pulley 1. The output end of the drive motor 16 is fixedly connected to a synchronous pulley 2, and the other end of the synchronous belt 6 is sleeved on the synchronous pulley 2. One end of the inner rotating rod 121 is rotatably connected to the air pump 15. The drive motor 16 can drive the inner rotating rod 121 to rotate through the synchronous belt 6. The two ends of the outer rotating rod 122... Each end of the inner rotating rod 121 has a rotating groove 123. A rotating block 124 is fixed to the inner rotating rod 121 at the position corresponding to the rotating groove 123. The rotating block 124 can rotate 60° within the rotating groove 123. Multiple stirring plates 125 are fixedly connected to the outer rotating rod 122. The stirring plates 125 are arranged in three equidistant rows on the outer rotating rod 122. The stirring plates 125 have a fan-shaped structure, and multiple vent holes 126 are opened inside the stirring plates 125. The vent holes 126 are arranged equidistantly on the sides of the stirring plates 125. A through hole 127 is opened on the outer rotating rod 122, communicating with the vent holes 126. A through hole 128 is opened on the inner rotating rod 121 at the position corresponding to the through hole 127. (It should be noted that this is for ease of demonstration of the structure of the inner rotating rod 121 and the outer rotating rod 122.) Figure 5 The inner rotating rod 121 and the outer rotating rod 122 shown are in a misaligned state.

[0045] Both ends of the inner rotating rod 121 pass through the box body 11. One end of the inner rotating rod 121 is rotatably connected to the air pump 15, and the other end of the inner rotating rod 121 is rotatably connected to the air supply pipe 3. The air supply pipe 3 is connected to the tank cover 22. The box body 11 is connected to the tank body 21 through the water supply pipe 4. A cleaning mechanism 23 is provided inside the tank body 21. A mud supply pipe 5 is fixedly connected to the bottom of the tank body 21, and the other end of the mud supply pipe 5 is connected to the box body 11.

[0046] Specifically, all valves are closed, and the wastewater to be treated is poured into aeration tank 1 until the predetermined water level is reached. Activated sludge is added. Activated sludge mainly consists of flocculent particles composed of aerobic microorganisms (bacteria, fungi, protozoa, etc.), organic and inorganic colloids, and suspended solids. The aerobic microorganisms degrade organic pollutants in the asphalt wastewater through metabolism. The drive motor 16 is started and rotates forward, driving the inner rotating rod 121 to rotate via synchronous pulley one, synchronous pulley two, and synchronous belt 6. Because multiple stirring plates 125 are fixedly connected to the outer rotating rod 122, the stirring plates 125 are subject to water resistance, causing the inner rotating rod 121 and the outer rotating rod 122 to rotate relative to each other. When the rotating block 124 moves to one end of the rotating trough 123, the rotating block 124 and the rotating trough 123 rotate relative to each other. When the 23-phase stop is engaged, the inner rotating rod 121 and the outer rotating rod 122 rotate synchronously, and the through hole 128 on the inner rotating rod 121 is connected to the through hole 127 on the outer rotating rod 122. The air pump 15 is started, and the air pump 15 delivers air into the aeration mechanism 12. The air passes through the through hole 128 on the inner rotating rod 121 and the through hole 127 on the outer rotating rod 122, and is discharged from the exhaust hole 126 on the stirring plate 125, generating tiny bubbles in the water. As the bubbles rise, they transfer oxygen to the water. At the same time, the stirring plate 125 on the outer rotating rod 122 continuously stirs and mixes the wastewater, activated sludge, and bubbles, improving the activity of microorganisms and thus enhancing their ability to degrade organic matter through adsorption and metabolism, thereby purifying the wastewater.

[0047] Wastewater generated during asphalt reprocessing typically contains petroleum-based substances and suspended solids. These substances can affect the degradation of organic matter by microorganisms in aeration tank 1. As oily substances adhere to and aggregate with bubbles in aeration device 12, they form scum that floats on the surface of the water in aeration tank 1. This invention removes these scum using a dredging device 13.

[0048] The salvage mechanism 13 includes a counterweight rod 131, which is a semi-cylindrical structure. Slider blocks 132 are provided at both ends of the counterweight rod 131. A sliding groove 133 is provided on the inner wall of the box 11. The sliding groove 133 is located directly above the aeration mechanism 12. The sliders 132 are inserted into the sliding groove 133. Multiple pin plates 134 are fixed at equal intervals on the upper surface of the counterweight rod 131. Each pin plate 134 is hinged to two connecting rods 135. The other end of the connecting rod 135 is hinged to the bottom of the float 136. The surface of the float 136 is covered with a lint sleeve.

[0049] The opening of the collection box 14 is serrated, which can scrape off and collect the foam on the surface of the float plate 136.

[0050] Specifically, when the aeration mechanism 12 is not activated, the float 136 floats on the water surface, offsetting its own weight and that of the counterweight rod 131. Due to the gravity of the counterweight rod 131, the counterweight rod 131 drags the two rows of floats 136 together through the connecting rod 135. When the aeration mechanism 12 rotates, the stirring plate 125 rotates and comes into contact with the arc surface at the bottom of the counterweight rod 131, pushing the counterweight rod 131 to move upward. The sliding groove 133 on the inner wall of the box 11 restricts the sliding blocks 132 on both sides of the counterweight rod 131 to move vertically, ensuring that the connecting rods 135 on both sides unfold to both sides simultaneously, pushing the two rows of floats 136 to move to both sides of the box 11 respectively. The floats 136 push the foam on the surface of the water into the collection box 14 set on the box 11. At the same time, the serrated opening of the collection box 14 scrapes off and collects the foam on the lint sleeves on the surface of the floats 136.

[0051] The wastewater treated by the aeration tank 1 will be transported to the sedimentation tank 2 for sedimentation and separation. The sedimentation tank 2 will allow suspended solids to settle through natural sedimentation, thereby reducing the turbidity of the water and improving the transparency of the water.

[0052] The sedimentation tank 2 of the present invention is connected to the box body 11 through a water supply pipe 4. A filter screen is fixed at the end of the water supply pipe 4. When the valve 2 41 is opened, the wastewater treated by the aeration tank 1 passes through the filter screen, filtering out larger sand and impurities in the wastewater, allowing the activated sludge and wastewater to pass through and flow into the sedimentation tank 2 for sedimentation.

[0053] The sedimentation tank 2 is equipped with a cleaning mechanism 23, which includes a rotating shaft 231 rotatably connected to the tank body 21. Fan blades 232 are equidistantly arranged on the upper circumference of the rotating shaft 231. A partition 24 is fixed above the tank body 21, and the rotating shaft 231 passes through the partition 24. A cavity 25 is formed inside the tank cover 22, and the cavity 25 is in close contact with the fan blades 232 to improve the airtightness of the sedimentation tank 2 and prevent air leakage. A gas supply pipe 3 passes through the tank cover 22 and communicates with the cavity 25. A venting groove 26 is formed in the partition 24 for ventilation. The air trough 26 is connected to the air supply pipe 3. The air in the air supply pipe 3 can only enter the tank body 21 through the air trough 26 after passing through the cavity 25, thereby increasing the pressure inside the tank body 21. The lower end of the rotating shaft 231 is fixedly connected to multiple T-shaped rods 233. The T-shaped rods 233 are inclined. The lower end of the T-shaped rods 233 is fixedly connected to a brush 234. When the rotating shaft 231 rotates, it drives the T-shaped rods 233 to rotate. The brush 234 sweeps the sludge at the bottom of the tank towards the center of the bottom of the tank. The sludge is swept into the sludge discharge trough 27, which is connected to the sludge supply pipe 5.

[0054] Specifically, after the wastewater treated in aeration tank 1 completely enters sedimentation tank 2, valve 41 is closed. After the wastewater in sedimentation tank 2 has completed sedimentation, activated sludge will settle at the bottom of tank 21, with clearer wastewater above the activated sludge. At this time, valves 31 and 51 are opened, causing drive motor 16 to reverse. This reverses the inner rotating rod 121 via synchronous belt 6. Due to inertia, the outer rotating rod 122 causes the inner and outer rotating rods 121 to rotate relative to each other again. At this time, rotating block 124 moves to the other end of rotating trough 123, and rotating block 124 abuts against rotating trough 123 for limiting. Thus, the inner and outer rotating rods 121 rotate synchronously, but the through hole 128 on the inner rotating rod 121 and the through hole 12 on the outer rotating rod 122 are closed. 7 is not connected. The air pump 15 delivers air to the sedimentation tank 2 through the aeration mechanism 12. When the air passes through the cavity 25, it drives the fan blade 232 to rotate, which in turn drives the T-shaped rod 233 to rotate. The brush 234 fixed at the bottom of the T-shaped rod 233 cleans the activated sludge at the bottom of the tank 21. Since the T-shaped rod 233 is inclined, the rotating T-shaped rod 233 drives the brush 234 to push the activated sludge into the sludge discharge trough 27 at the bottom of the tank. At the same time, the continuously delivered air increases the pressure in the sedimentation tank 2, which transports the sludge back to the box 11 from the sludge conveying pipe 5. The microorganisms in the activated sludge continue to degrade organic matter. When the activated sludge in the sedimentation tank 2 is completely transported, the valve 4 71 is opened, and the treated wastewater in the tank is transported to the subsequent treatment process through the drain pipe 7.

[0055] When the activated sludge is transported back to the aeration tank 1, the pH value in the aeration tank 1 will change and the dosage of active enzymes will decrease. In order to maintain the activity of microorganisms, it is necessary to add regulating agents. This invention realizes the automatic spraying function by setting up a spraying mechanism 8.

[0056] An installation groove 129 is provided on the outer rotating rod 122. A spraying mechanism 8 is installed on the installation groove 129. The spraying mechanism 8 includes a housing 81. A sliding plate 82 is slidably connected to the bottom of the housing 81. A nozzle 83 is fixedly connected to the upper part of the housing 81. The nozzle 83 is a one-way nozzle. The housing 81 is filled with a pesticide.

[0057] Specifically, the mounting slot 129 is located between adjacent stirring plates 125. When the drive motor 16 reverses, it drives the inner rotating rod 121 to reverse through the synchronous belt 6. Due to the inertia of the outer rotating rod 122, the inner rotating rod 121 and the outer rotating rod 122 rotate relative to each other. At this time, the rotating block 124 moves to the other end of the rotating groove 123. The rotating block 124 abuts against the rotating groove 123 to limit the movement. Then, the inner rotating rod 121 and the outer rotating rod 122 rotate synchronously. The through hole 128 of the inner rotating rod 121 is directly below the spraying mechanism 8. When the air pump 15 is turned on, the air pushes the slide plate 82 upward, squeezing the agent in the housing 81 and spraying it out from the nozzle 83. The agent will balance the acidity and alkalinity in the wastewater, keeping the microorganisms in the best active state and continuously degrading the organic matter in the wastewater.

[0058] Working principle: The wastewater to be treated is poured into the aeration tank 1 until the predetermined water level is reached. Activated sludge is added, and the drive motor 16 is started. The drive motor 16 rotates forward, driving the inner rotating rod 121 to rotate. The stirring plate 125 is resisted by the water, causing the inner rotating rod 121 and the outer rotating rod 122 to rotate relative to each other until they rotate synchronously. This connects the second through hole 128 on the inner rotating rod 121 with the first through hole 127 on the outer rotating rod 122. The air pump 15 is started, and the air pump 15 delivers air into the aeration mechanism 12. The air passes through the second through hole 127 on the inner rotating rod 121. 8 and the through hole 127 on the outer rotating rod 122, and then discharged from the vent hole 126 on the stirring plate 125, generating tiny bubbles in the water. As the bubbles rise, they transfer oxygen to the water. The stirring plate 125 on the outer rotating rod 122 continuously stirs and mixes the wastewater, activated mud and bubbles. At the same time, the stirring plate 125 rotates and abuts against the arc surface of the lower part of the counterweight rod 131, pushing the counterweight rod 131 to move upward, pushing the two rows of float plates 136 to move to both sides of the tank 11 respectively. The float plates 136 push the foam on the surface of the water into the collection box 14 set on the tank 11. The collection box 14 scrapes off and collects the foam on the lint sleeve on the surface of the float plates 136.

[0059] After the wastewater in aeration tank 1 has been treated, valve 41 is opened to pump the treated wastewater into sedimentation tank 2. Valve 41 is then closed to allow the wastewater to settle in sedimentation tank 2. Once sedimentation is complete, activated sludge will settle at the bottom of tank 21, with clearer wastewater above it. At this point, valves 31 and 51 are opened to reverse the drive motor 16, causing the inner rotating rod 121 to rotate in reverse. This causes the inner and outer rotating rods 122 to rotate relative to each other again until they rotate synchronously. The through-hole 128 of the inner rotating rod 121 is directly below the spraying mechanism 8. When the air pump 15 is activated, the air pushes the slide plate 82 upward, squeezing the agent inside the housing 81 and spraying it out from the nozzle 83. The agent balances the acid in the wastewater. The alkalinity keeps the microorganisms in an optimal state of activity, continuously degrading organic matter in the wastewater. Subsequently, the air pump 15 delivers air to the sedimentation tank 2 through the aeration mechanism 12. When the air passes through the cavity 25, it drives the fan blade 232 to rotate, which in turn drives the T-shaped rod 233 to rotate. The brush 234 fixed at the bottom of the T-shaped rod 233 cleans the activated sludge at the bottom of the tank 21 and pushes the activated sludge into the sludge discharge trough 27 at the bottom of the tank. At the same time, the continuously delivered air increases the pressure in the sedimentation tank 2, squeezing the wastewater in the tank 21 and pushing the water level down, so that the sludge at the bottom is transported back to the tank 11 through the sludge conveying pipe 5, and the microorganisms in the activated sludge continue to degrade organic matter. When the activated sludge in the sedimentation tank 2 has been transported out, the valve 4 71 is opened, and the treated wastewater in the tank is transported to the subsequent treatment process through the drain pipe 7.

[0060] The above description is only a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto; any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and improved concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A wastewater treatment device for recycled asphalt, comprising an aeration tank (1) and a sedimentation tank (2), characterized in that: The aeration tank (1) includes a box (11), the sedimentation tank (2) includes a tank (21) and a tank cover (22), a drive motor (16) and an air pump (15) are fixed on the outer wall of the box (11), an aeration mechanism (12) is provided inside the box (11), and a retrieval mechanism (13) is provided on the upper part of the aeration mechanism (12). The aeration mechanism (12) includes an inner rotating rod (121) and an outer rotating rod (122), both of which are hollow rods. The outer rotating rod (122) is sleeved on the inner rotating rod (121). The inner rotating rod (121) is slightly longer than the outer rotating rod (122). The two ends of the outer rotating rod (122) are provided with rotating grooves (123). The inner rotating rod (121) is fixed with rotating blocks (124) at the positions corresponding to the rotating grooves (123). The outer rotating rod (122) is fixedly connected to a plurality of stirring plates (125), which are arranged in three rows at equal intervals on the outer rotating rod (122). The stirring plates (125) have a plurality of vent holes (126). The outer rotating rod (122) has a through hole one (127) which communicates with the vent holes (126). The inner rotating rod (121) has a through hole two (128) corresponding to the position of the through hole one (127). The salvage mechanism (13) includes a counterweight rod (131), which is a semi-cylindrical structure. Slider blocks (132) are provided at both ends of the counterweight rod (131). A sliding groove (133) is provided on the inner wall of the box (11). The sliding groove (133) is located directly above the aeration mechanism (12). The slider (132) is inserted into the sliding groove (133). Multiple pin plates (134) are fixed at equal intervals on the upper surface of the counterweight rod (131). The pin plates (134) are hinged to two connecting rods (135). The other end of the connecting rods (135) is hinged to the bottom of the float plate (136). The surface of the float plate (136) is covered with a lint sleeve. A collection box (14) is fixed on the inner wall of the box (11). The opening of the collection box (14) is serrated, which can scrape off and collect the foam on the surface of the float (136).

2. The wastewater treatment device for recycled asphalt according to claim 1, characterized in that: One end of the inner rotating rod (121) extends through to the outside of the housing (11) and is fixedly connected to a synchronous pulley. A synchronous belt (6) is fitted on the synchronous pulley. The output end of the drive motor (16) is fixedly connected to a synchronous pulley. The other end of the synchronous belt (6) is fitted on the synchronous pulley. The drive motor (16) can drive the inner rotating rod (121) to rotate through the synchronous pulley, the synchronous pulley, and the synchronous belt (6).

3. The wastewater treatment device for recycled asphalt according to claim 2, characterized in that: Both ends of the inner rotating rod (121) penetrate the box body (11). One end of the inner rotating rod (121) is rotatably connected to the air pump (15), and the other end of the inner rotating rod (121) is rotatably connected to the air supply pipe (3). The air supply pipe (3) is connected to the tank cover (22). A valve (31) is provided on the air supply pipe (3). A drain pipe (7) is opened on the surface of the tank body (21). A valve (71) is provided on the drain pipe (7). The box body (11) is connected to the tank body (21) through the water supply pipe (4). A valve (41) is provided on the water supply pipe (4). A cleaning mechanism (23) is provided inside the tank body (21). A mud supply pipe (5) is fixedly connected to the bottom of the tank body (21). The other end of the mud supply pipe (5) is connected to the box body (11). A valve (51) is provided on the mud supply pipe (5).

4. The wastewater treatment device for recycled asphalt according to claim 3, characterized in that: The cleaning mechanism (23) includes a rotating shaft (231), which is rotatably connected to the tank body (21). Fan blades (232) are equidistantly arranged on the upper circumference of the rotating shaft (231). A partition plate (24) is fixed above the tank body (21), and the rotating shaft (231) passes through the partition plate (24). A cavity (25) is opened inside the tank cover (22), and the fan blades (232) are located within the cavity (25). The air supply pipe (3) passes through the tank cover (22) and communicates with the cavity (25). A ventilation groove (26) is opened in the partition plate (24), and the ventilation groove (26) is connected to the air supply pipe (3). Multiple T-shaped rods (233) are fixedly connected to the lower end of the rotating shaft (231). The T-shaped rods (233) are inclined. A brush (234) is fixedly connected to the lower end of the T-shaped rod (233). When the rotating shaft (231) rotates, it drives the T-shaped rod (233) to rotate. The brush (234) sweeps the sludge at the bottom of the tank towards the center of the bottom of the tank. The sludge is swept into the sludge discharge trough (27), which is connected to the sludge conveying pipe (5).

5. The wastewater treatment device for recycled asphalt according to claim 3, characterized in that: A filter screen is fixed at the connection port between the water supply pipe (4) and the box (11). The filter screen can filter out larger sand and impurities in the sewage, allowing activated sludge and wastewater to pass through.

6. The wastewater treatment device for recycled asphalt according to claim 3, characterized in that: The outer rotating rod (122) is provided with an installation groove (129), and a spraying mechanism (8) is installed on the installation groove (129). The spraying mechanism (8) includes a housing (81), a sliding plate (82) is slidably connected to the bottom of the housing (81), and a nozzle (83) is fixedly connected to the upper part of the housing (81). The nozzle (83) is a one-way nozzle, and the housing (81) is filled with a medicine.

7. The wastewater treatment device for recycled asphalt according to claim 6, characterized in that: The mounting groove (129) is located between adjacent stirring plates (125). The rotating block (124) can rotate 60° in the rotating groove (123). When the drive motor (16) reverses, the rotating block (124) rotates to the other end of the rotating groove (123). The through hole (128) of the inner rotating rod (121) moves to the bottom of the spraying mechanism (8). When the air pump (15) is turned on, the air pushes the slide plate (82) upward, squeezing the agent in the housing (81) out of the nozzle (83).

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