Wastewater treatment equipment for cleaning cast aluminum automobile workpieces and treatment process of wastewater treatment equipment

Abstract

The invention discloses wastewater treatment equipment for cleaning cast aluminum automobile workpieces and a treatment process of the wastewater treatment equipment, and relates to the technical field of wastewater treatment.The wastewater treatment equipment comprises a raw water tank used for storing to-be-treated wastewater; the air floatation and precipitation all-in-one machine is used for removing suspended matters and oils in the wastewater; the quartz sand filter is used for further removing suspended matters in the wastewater; the activated carbon filter is used for removing organic matters in the wastewater; the ultrafiltration membrane device is used for removing ions and small molecular organic matters in the wastewater; the water producing box is used for storing treated water, a water purifying box is arranged on one side of the water producing box, a high-pressure pump is arranged between the water purifying box and the water producing box and used for conveying water from the water producing box into the water purifying box, and a reverse osmosis device is installed in the water purifying box. By arranging various filtering devices and arranging the reverse osmosis device, the wastewater treatment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to wastewater treatment equipment for cleaning cast aluminum automobile workpieces and a treatment process thereof. Background Art

[0002] Aluminum castings for automobiles generate a large amount of cleaning wastewater during the production process. These wastewaters contain a variety of pollutants, such as organic matter, heavy metal ions, suspended solids, oils, etc., which pose a serious threat to the environment. Therefore, developing efficient, economical, and environmentally friendly wastewater treatment technologies and equipment to meet increasingly stringent environmental protection requirements has become a research focus in this field.

[0003] Related technologies can refer to the patent application with publication number CN116332304A, which discloses an electroplating wastewater treatment equipment and its treatment process, including a coagulation reaction tank and an inclined plate sedimentation tank, the inclined plate sedimentation tank includes a main body and a hopper, the hopper is located below the main body, the partition plate separates the space inside the main body into a water inlet area and an inclined plate sedimentation area, the inclined plate sedimentation area is provided with an inclined plate assembly, the top of the main body corresponding to the inclined plate sedimentation area is provided with a clear liquid drainage pipe, the bottom of the hopper is provided with a sewage pipe, and the sewage pipe is provided with a sewage switch valve; the inclined plate sedimentation tank is provided with a movable partition and a lifting mechanism, the lifting mechanism includes a lifting drive and a traction rope, the lifting drive lifts the movable partition through the traction rope, the inner peripheral wall of the hopper is provided with a stepped surface, when the movable partition is located at the lower limit, the plate-shaped surface of the movable partition faces the vertical direction, and the peripheral edge of the movable partition abuts the stepped surface. The invention enables the inclined plate sedimentation tank to discharge sludge as soon as possible and timely, while reducing excessive water discharged with sludge.

[0004] With regard to the above-mentioned related technologies, the existing wastewater treatment technology has the problems of unsatisfactory treatment effect, high cost and easy secondary pollution when treating the wastewater of cast aluminum automobile workpieces. Therefore, a new type of wastewater treatment equipment and its treatment process are urgently needed. Summary of the invention

[0005] In order to improve product quality and production efficiency, the present invention provides a wastewater treatment device for cleaning cast aluminum automobile workpieces and a treatment process thereof.

[0006] In a first aspect, the present invention provides a wastewater treatment device for cleaning cast aluminum automobile workpieces, which adopts the following technical solution: A wastewater treatment device for cleaning cast aluminum automobile workpieces comprises a raw water tank for storing wastewater to be treated; an integrated flotation sedimentation machine for removing suspended matter and oil in the wastewater; a quartz sand filter for further removing suspended matter in the wastewater; an activated carbon filter for removing organic matter in the wastewater; an ultrafiltration membrane device for removing ions and small molecular organic matter in the wastewater; and a production water tank for storing treated water, characterized in that a clean water tank is provided on one side of the production water tank, a high-pressure pump is provided between the clean water tank and the production water tank for transporting water from the production water tank to the clean water tank, and a reverse osmosis device is installed in the clean water tank.

[0007] By adopting the above technical scheme, the wastewater is treated in turn through the flotation sedimentation integrated machine, quartz sand filter, activated carbon filter and reverse osmosis device. By equipping the reverse osmosis device at the end and using a semi-permeable spiral membrane, the soluble solids, organic matter, colloid substances and bacteria in the water can be separated and removed by pressurization. When the raw water is sent to and passes through the reverse osmosis membrane at a certain pressure, the water passes through the tiny pores of the membrane and is collected to obtain pure water. The impurities in the water are concentrated in the intercepted liquid and discharged. The RO membrane can remove more than 98% of the soluble solids, more than 99% of the organic matter and colloids, and almost 100% of the bacteria in the raw water, which is beneficial to improve the treatment efficiency of wastewater.

[0008] Optionally, the top of the raw water tank is connected to a water adding pipe, and a rotating motor is provided at the top of the raw water tank. The output shaft of the rotating motor passes through the raw water tank and is coaxially fixedly connected to a rotating shaft, and a plurality of stirring blades are provided on the rotating shaft.

[0009] By adopting the above technical solution, when wastewater treatment is required, the staff adds the wastewater into the water adding pipe and then starts the rotating motor. The rotating motor drives the rotating shaft to rotate, thereby driving the stirring blades to rotate, thereby achieving homogenous treatment of the wastewater, which is beneficial to improving the efficiency of subsequent water treatment.

[0010] Optionally, the flotation and sedimentation integrated machine includes a flotation tank, a sedimentation tank and a water storage tank. The bottom end of the flotation tank is connected to the sedimentation tank through a pipeline, the top end of the sedimentation tank is connected to the water storage tank through a pipeline, the top end of the flotation tank is connected to the raw water tank through a pipeline, and is provided with a first booster pump for transporting wastewater from the raw water tank to the flotation tank. The upper end face of the flotation tank is connected to a dosing pipe, and a cleaning component for cleaning scum is provided in the flotation tank.

[0011] By adopting the above technical solution, when wastewater treatment is required, the staff adds flocculants into the dosing pipe, and the flocculants are mixed and then enter the bottom of the flotation tank, where they are mixed and contacted with the released dissolved air and water, so that the flocculants adhere to the tiny bubbles and then enter the flotation tank. The flocculants float to the water surface under the action of air buoyancy to form scum on the water surface. After the scum gathers to a certain thickness, it is cleaned by the cleaning component, and the water produced by the flotation tank enters the sedimentation tank, where it is precipitated and overflows to the storage tank.

[0012] Optionally, the cleaning component includes two lifting plates, the two lifting plates are relatively arranged in the flotation tank, and lifting screws are provided in the lifting plates. A sliding plate is slidably connected in the lifting plate, the sliding plate is threadedly connected to the lifting screw, and the sliding plate is slidably connected to the lifting plate. A driving motor is provided at the bottom of the flotation tank, and the output shaft of the driving motor is coaxially fixedly connected to a connecting shaft, the connecting shaft extends along the length direction of the flotation tank, and the connecting shaft is connected to the lifting screw through a bevel gear pair. A moving plate is provided above the lifting plate, and a first motor is provided at the top of the flotation tank. The output shaft of the first motor A moving screw is coaxially fixedly connected through the flotation tank, a limit rod is provided on one side of the moving screw, two ends of the moving screw and the limit rod are respectively connected to two side walls in the flotation tank, the moving plate is threadedly connected to the moving screw, the moving plate is slidably connected to the limit rod, the moving plate is slidably connected to the flotation tank, a scraper is provided under the moving plate, the scraper is L-shaped, one end of the scraper is hinged to the moving plate, and the other end is provided with an inclined surface for cleaning scum, baffles are provided on both sides of the scraper, and an arched protrusion is also provided in the scraper, the arched protrusion, the scraper and the baffle form a slag storage area for collecting scum.

[0013] By adopting the above technical solution, when it is necessary to clean the scum through the cleaning component, the staff starts the driving motor, and the driving motor drives the connecting shaft to rotate, so that the sliding plate in the lifting plate descends, so that water overflows into the space between the two lifting plates, and then flocculants are added to the inside through the dosing pipe. After mixing, the flocculants enter the bottom of the flotation tank and mix with the released dissolved air water, so that the flocculants adhere to the tiny bubbles. The flocculants float to the water surface under the action of air buoyancy to form scum on the water surface. After the scum gathers to a certain thickness, the staff starts the first motor, and the first motor drives the moving screw to rotate, thereby driving the moving plate to move, and then the scraper cleans the scum on the water surface. The cleaned scum will be accumulated in the slag storage area for later cleaning.

[0014] Optionally, a positioning plate is provided on the side of the flotation tank away from the moving motor for stopping the scraper, and a collecting box is provided below the positioning plate, one end of the collecting box is in contact with the sliding plate, and a handle is provided at the other end, and the collecting box is slidably connected to the flotation tank.

[0015] By adopting the above technical solution, when the scum needs to be cleaned, the scraper will gradually approach the positioning plate. When one end of the scraper touches the positioning plate, the upper movable plate is still in a moving state, thereby increasing the angle between the scraper and the movable plate, causing the scraper to tilt, and then pouring the scum in the slag storage area into the collection box. After a period of time, the staff can take out the collection box by pulling the handle to facilitate the cleaning of the scum.

[0016] Optionally, a filter booster pump is provided between the quartz sand filter and the water tank, and a side of the quartz sand filter away from the water tank is connected to the activated carbon filter through a pipeline.

[0017] By adopting the above technical solution, the quartz sand filter utilizes quartz sand and other filter media. Under the pressure of the filter booster pump, the original liquid is removed from impurities through the contact adsorption and interception of the quartz sand, thereby achieving the purpose of filtration. In addition, the quartz sand filter has a backwashing function, and pollutants such as dirt are quickly washed away, consuming less water.

[0018] Optionally, the side of the activated carbon filter away from the quartz sand filter is connected to a security filter, and the ultrafiltration membrane device is arranged in a water production tank.

[0019] By adopting the above technical scheme, the ultrafiltration membrane device adopts advanced internal pressure membrane separation technology to perform separation at room temperature and low pressure. It has the advantages of low energy consumption, high filtration accuracy, large water output, and strong anti-fouling ability. It can effectively filter out bacteria, colloids, suspended matter, rust, large molecular organic matter and other harmful substances in the water; the activated carbon filter adsorbs pollutants in the water through the carbon bed, thereby achieving the filtering effect; under the action of pressure, the security filter allows the original liquid to pass through the filter material, the filter residue remains on the tube wall, and the filtrate flows out through the filter material, thereby achieving the purpose of filtration.

[0020] In a second aspect, the present application provides a processing method, comprising the following steps: S1: The wastewater first enters the raw water tank through the water adding pipe, and then the rotating motor is started. The rotating motor drives the rotating shaft to rotate, and then drives the stirring blade to rotate, so as to achieve homogenization treatment of the wastewater in the raw water tank; S2: The sewage in the raw water tank is transported to the flotation tank of the flotation sedimentation integrated machine through the first booster pump, and then the staff starts the driving motor, which drives the connecting shaft to rotate, so that the sliding plate in the lifting plate drops, so that the water overflows into the space between the two lifting plates, and then flocculants are added to the inside through the dosing pipe. After mixing, the flocculants enter the bottom of the flotation tank and mix with the released dissolved air water, so that the flocculants adhere to the tiny bubbles. The flocculants float to the water surface under the action of air buoyancy to form scum on the water surface. After the scum gathers to a certain thickness, the staff starts the first motor, which drives the moving screw to rotate, thereby driving the moving plate to move, and then the scraper cleans the scum on the water surface. The cleaned scum will be accumulated in the slag storage area for later cleaning; S3: The water produced by the flotation tank enters the sedimentation tank, where it is precipitated. The water overflows into the water storage tank. Then the staff starts the filter booster pump. The water is transported from the water storage tank to the quartz sand filter for primary filtration, and then to the activated carbon filter for secondary filtration. S4: The water produced by the activated carbon filter is transported to the security filter again, and finally passes through the ultrafiltration membrane device in the clean water tank and the reverse osmosis device in the clean water tank in turn, thereby realizing the treatment of the wastewater.

[0021] In summary, the present invention includes at least one of the following beneficial technical effects: By setting a lifting plate, a lifting screw, a sliding plate, a driving motor, a first motor, a scraper, a baffle, an arched protrusion and a slag storage area, when the scum needs to be cleaned by the cleaning component, the staff starts the driving motor, and the driving motor drives the connecting shaft to rotate, so that the sliding plate in the lifting plate descends, so that water overflows into between the two lifting plates, and then flocculants are added to the inside through the dosing pipe. After mixing, the flocculants enter the bottom of the flotation tank and mix with the released dissolved air water to make the floccules adhere to the tiny bubbles. The floccules float to the water surface under the action of air buoyancy to form scum on the water surface. After the scum gathers to a certain thickness, the staff starts the first motor, and the first motor drives the moving screw to rotate, thereby driving the moving plate to move, and then the scraper cleans the scum on the water surface. The cleaned scum will be accumulated in the slag storage area for later cleaning; By setting the positioning plate, the collection box and the handle, when the scum needs to be cleaned, the scraper will gradually approach the positioning plate. When one end of the scraper touches the positioning plate, the upper movable plate is still in a moving state, thereby increasing the angle between the scraper and the movable plate, causing the scraper to tilt, and then pouring the scum in the slag storage area into the collection box. After a period of time, the staff can take out the collection box by pulling the handle to facilitate the cleaning of the scum. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention is a schematic diagram of the overall structure of a wastewater treatment device for cleaning cast aluminum automobile workpieces.

[0023] Figure 2 The present invention is a schematic cross-sectional structure diagram of a wastewater treatment device for cleaning cast aluminum automobile workpieces.

[0024] Figure 3 It is a schematic diagram of the overall structure of the air flotation sedimentation machine.

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the air flotation sedimentation integrated machine.

[0026] Figure 5 It is a schematic diagram highlighting the internal structure of the air flotation sedimentation machine.

[0027] Figure 6 yes Figure 2 Enlarged schematic diagram of part A.

[0028] Figure 7 yes Figure 4 Schematic diagram of the enlarged portion B.

[0029] Description of reference numerals: 1. raw water tank; 11. water adding pipe; 12. rotating motor; 13. rotating shaft; 14. stirring blade; 2. air flotation sedimentation integrated machine; 21. air flotation tank; 22. sedimentation tank; 23. water storage tank; 24. first booster pump; 25. dosing pipe; 26. cleaning assembly; 261. lifting plate; 262. lifting screw; 263. sliding plate; 264. driving motor; 265. connecting shaft; 266. moving plate; 2661. scraper; 2662. inclined plane ; 2663, baffle; 2664, arched protrusion; 2665, slag storage area; 2666, positioning plate; 2667, collection box; 2668, handle; 267, first motor; 268, moving screw; 269, limit rod; 3, filter assembly; 31, quartz sand filter; 32, filter booster pump; 33, activated carbon filter; 34, security filter; 4, water production tank; 41, ultrafiltration membrane device; 42, clean water tank; 43, high-pressure pump; 5, reverse osmosis device. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with all the accompanying drawings.

[0031] The embodiment of the invention discloses a wastewater treatment device for cleaning cast aluminum automobile workpieces.

[0032] Reference Figure 1 and Figure 2, a wastewater treatment equipment for cleaning cast aluminum automobile workpieces, including a raw water tank 1, an air flotation sedimentation integrated machine 2, a filter component 3, a water production tank 4 and a reverse osmosis device 5, one side of the raw water tank 1 is connected with the air flotation sedimentation integrated machine 2, the filter component 3 is arranged on the side of the air flotation sedimentation integrated machine 2 away from the raw water tank 1, the water production tank 4 is connected with the side of the filter component 3 away from the raw water tank 1, and the reverse osmosis device 5 is arranged in the water production tank 4. The raw water tank 1 stores wastewater and pre-treats it, the air flotation sedimentation integrated machine 2 performs preliminary filtration on the wastewater, the filter component 3 realizes subsequent filtration of the wastewater, the water production tank 4 collects the filtered wastewater, and performs the last step of filtration treatment through the reverse osmosis device 5, so as to obtain pure water.

[0033] Reference Figure 2 and Figure 6 The top of the raw water tank 1 is connected to a water supply pipe 11, and a rotating motor 12 is provided at the top of the raw water tank 1. The output shaft of the rotating motor 12 passes through the raw water tank 1 and is coaxially fixedly connected to a rotating shaft 13, and a plurality of stirring blades 14 are provided on the rotating shaft 13. When wastewater treatment is required, the staff adds wastewater to the water supply pipe 11, and then starts the rotating motor 12. The rotating motor 12 drives the rotating shaft 13 to rotate, thereby driving the stirring blades 14 to rotate, thereby achieving homogenization of the wastewater, which is beneficial to improving the efficiency of subsequent water treatment. Reference Figure 2 and Figure 3 The flotation and sedimentation integrated machine 2 includes a flotation tank 21, a sedimentation tank 22 and a water storage tank 23. The bottom of the flotation tank 21 is connected to the sedimentation tank 22 through a pipeline, the top of the sedimentation tank 22 is connected to the water storage tank 23 through a pipeline, the top of the flotation tank 21 is connected to the raw water tank 1 through a pipeline, and is equipped with a first booster pump 24 for transporting wastewater from the raw water tank 1 to the flotation tank 21. The upper end surface of the flotation tank 21 is connected to a dosing pipe 25, and a cleaning component 26 for cleaning scum is provided in the flotation tank 21.

[0034] Reference Figure 2 and Figure 3 When wastewater treatment is required, the staff adds flocculants into the dosing pipe 25, and the flocculants are mixed and then enter the bottom of the flotation tank 21, where they are mixed and contacted with the released dissolved air water, so that the flocculants adhere to the tiny bubbles and then enter the flotation tank 21. The flocculants float to the water surface under the action of air buoyancy to form scum on the water surface. After the scum gathers to a certain thickness, it is cleaned by the cleaning component 26. The water produced by the flotation tank 21 enters the sedimentation tank 22, where it is precipitated, and the water overflows to the water storage tank 23.

[0035] Reference Figure 4 , Figure 5 and Figure 7The cleaning assembly 26 includes two lifting plates 261, which are relatively arranged in the flotation tank 21. A lifting screw 262 is provided in each lifting plate 261. A sliding plate 263 is slidably connected in the lifting plate 261. The sliding plate 263 is threadedly connected to the lifting screw 262. The sliding plate 263 is slidably connected to the lifting plate 261. A driving motor 264 is provided at the bottom of the flotation tank 21. The output shaft of the driving motor 264 is coaxially fixedly connected with a connecting shaft 265. The connecting shaft 265 extends along the length direction of the flotation tank 21. The connecting shaft 265 is connected to the lifting screw 262 through a bevel gear pair. A moving plate 266 is provided above the lifting plate 261. A first motor 267 is provided at the top of the flotation tank 21. The output shaft of the first motor 267 passes through the coaxial fixed connection of the flotation tank 21. A moving screw 268 is connected, a limiting rod 269 is provided on one side of the moving screw 268, and both ends of the moving screw 268 and the limiting rod 269 are respectively connected to two side walls in the flotation tank 21, a moving plate 266 is threadedly connected to the moving screw 268, the moving plate 266 is slidably connected to the limiting rod 269, the moving plate 266 is slidably connected to the flotation tank 21, a scraper 2661 is provided below the moving plate 266, the scraper 2661 is L-shaped, one end of the scraper 2661 is hinged to the moving plate 266, and the other end is provided with an inclined surface 2662 for cleaning scum, baffles 2663 are provided on both sides of the scraper 2661, and an arched protrusion 2664 is also provided in the scraper 2661, the arched protrusion 2664, the scraper 2661 and the baffle 2663 form a slag storage area 2665 for collecting scum.

[0036] Reference Figure 4 , Figure 5 and Figure 7 When the scum needs to be cleaned by the cleaning component 26, the staff starts the driving motor 264, and the driving motor 264 drives the connecting shaft 265 to rotate, so that the sliding plate 263 in the lifting plate 261 descends, so that the water overflows into the space between the two lifting plates 261, and then the flocculant is added to the inside through the dosing pipe 25. After mixing, the flocculant enters the bottom of the flotation tank and mixes with the released dissolved air water, so that the flocculent adheres to the tiny bubbles. The flocculent floats to the water surface under the action of the buoyancy force to form scum on the water surface. After the scum gathers to a certain thickness, the staff starts the first motor 267, and the first motor 267 drives the moving screw 268 to rotate, thereby driving the moving plate 266 to move, and then the scraper 2661 cleans the scum on the water surface. The cleaned scum will be accumulated in the slag storage area 2665 for later cleaning.

[0037] Reference Figure 4 , Figure 5 and Figure 7A positioning plate 2666 is provided on the side of the flotation tank 21 away from the moving motor, which is used to stop the scraper 2661. A collection box 2667 is provided below the positioning plate 2666. One end of the collection box 2667 abuts against the sliding plate 263, and the other end is provided with a handle 2668. The collection box 2667 is slidably connected to the flotation tank 21. When the scum needs to be cleaned, the scraper 2661 will gradually approach the positioning plate 2666. When one end of the scraper 2661 contacts the positioning plate 2666, the upper moving plate 266 is still in a moving state, thereby increasing the angle between the scraper 2661 and the moving plate 266, and tilting the scraper 2661, thereby pouring the scum in the slag storage area 2665 into the collection box 2667. After a period of time, the staff can pull the handle 2668 to take out the collection box 2667, which is convenient for cleaning the scum.

[0038] Reference Figure 1 The filter assembly 3 includes a quartz sand filter 31. A filter booster pump 32 is provided between the quartz sand filter 31 and the water tank 23. The side of the quartz sand filter 31 away from the water tank 23 is connected to an activated carbon filter 33. The quartz sand filter 31 uses filter media such as quartz sand. Under the pressure of the filter booster pump 32, the original liquid is subjected to contact adsorption, interception and other effects of quartz sand to remove impurities, thereby achieving the purpose of filtration. In addition, the quartz sand filter 31 has a backwashing function, and pollutants such as dirt are quickly washed away, with less water consumption.

[0039] Reference Figure 1 and Figure 2 The side of the activated carbon filter 33 away from the quartz sand filter 31 is connected to the security filter 34, and the water production tank 4 is provided with an ultrafiltration membrane device 41. The ultrafiltration membrane device 41 adopts advanced internal pressure membrane separation technology, and performs separation at room temperature and low pressure. It has the advantages of low energy consumption, high filtration accuracy, large water production, strong anti-fouling ability, etc., and can effectively filter out harmful substances such as bacteria, colloids, suspended matter, rust, and macromolecular organic matter in the water; the activated carbon filter 33 adsorbs pollutants in the water through the carbon bed, thereby achieving the filtering effect; the security filter 34, under the action of pressure, allows the original liquid to pass through the filter material, the filter residue remains on the tube wall, and the filtrate flows out through the filter material, thereby achieving the purpose of filtering.

[0040] Reference Figure 1 and Figure 2 A clean water tank 42 is provided on one side of the water production tank 4 , and a high-pressure pump 43 is provided between the clean water tank 42 and the water production tank 4 for transporting water from the water production tank 4 to the clean water tank 42 . The reverse osmosis device 5 is installed in the clean water tank 42 .

[0041] Reference Figure 1 and Figure 2The wastewater is sequentially treated by the flotation sedimentation integrated machine 2, the quartz sand filter 31, the activated carbon filter 33 and the reverse osmosis device 5. By using the semi-permeable spiral membrane at the end of the reverse osmosis device 5, the soluble solids, organic matter, colloid substances and bacteria in the water can be separated and removed by pressurization. When the raw water is sent to and passes through the reverse osmosis membrane at a certain pressure, the water passes through the tiny pores of the membrane and is collected to obtain pure water. The impurities in the water are concentrated in the intercepted liquid and discharged. The RO membrane can remove more than 98% of the soluble solids, more than 99% of the organic matter and colloids, and almost 100% of the bacteria in the raw water, which is beneficial to improving the treatment efficiency of the wastewater.

[0042] The embodiment of the present application also discloses a processing process.

[0043] A processing process comprises the following steps: S1: The wastewater first enters the raw water tank 1 through the water supply pipe 11, and then the rotating motor 12 is started, the rotating motor 12 drives the rotating shaft 13 to rotate, and then drives the stirring blade 14 to rotate, so as to achieve homogenization of the wastewater in the raw water tank 1; S2: The sewage in the raw water tank 1 is transported to the flotation tank 21 of the flotation sedimentation integrated machine 2 through the first booster pump 24, and then the staff starts the driving motor 264, which drives the connecting shaft 265 to rotate, so that the sliding plate 263 in the lifting plate 261 is lowered, so that the water overflows into the space between the two lifting plates 261, and then the flocculant is added to the inside through the dosing pipe 25. After mixing, the flocculant enters the bottom of the flotation tank and mixes with the released dissolved air water, so that the flocculent adheres to the tiny bubbles. The flocculent floats to the water surface under the action of the air buoyancy to form scum on the water surface. After the scum gathers to a certain thickness, the staff starts the first motor 267, and the first motor 267 drives the moving screw 268 to rotate, thereby driving the moving plate 266 to move, and then the scraper 2661 cleans the scum on the water surface. The cleaned scum will be accumulated in the slag storage area 2665 for later cleaning; S3: The produced water from the flotation tank 21 enters the sedimentation tank 22, where it is precipitated, and the produced water overflows into the water storage tank 23. Then the staff starts the filter booster pump 32, and the produced water is transported to the quartz sand filter 31 through the water storage tank 23 for primary filtration, and then transported to the activated carbon filter 33 for secondary filtration; S4: The water produced by the activated carbon filter 33 is transported to the security filter 34 again, and finally passes through the ultrafiltration membrane device 41 in the clean water tank 42 and the reverse osmosis device 5 in the clean water tank 42 in sequence, thereby achieving the treatment of the wastewater.

[0044] The implementation principle of a wastewater treatment device for cleaning cast aluminum automobile workpieces and its treatment process in an embodiment of the present invention is as follows: the wastewater first enters the raw water tank 1 through the water adding pipe 11, and then the rotating motor 12 is started, the rotating motor 12 drives the rotating shaft 13 to rotate, and then drives the stirring blade 14 to rotate, so as to realize the homogenization treatment of the sewage in the raw water tank 1, and the sewage in the raw water tank 1 is transported to the flotation tank 21 of the flotation sedimentation integrated machine 2 through the first booster pump 24, and then the staff starts the driving motor 264, the driving motor 264 drives the connecting shaft 265 to rotate, so that the sliding plate 263 in the lifting plate 261 descends, so that the water overflows into between the two lifting plates 261, and then the flocculant is added to the inside through the dosing pipe 25. After mixing, the flocculant enters the bottom of the flotation tank and mixes with the released dissolved air water, so that the floccules adhere to the tiny bubbles, and the floccules float to the water under the action of the flotation force. After the scum on the water surface is formed to a certain thickness, the staff starts the first motor 267, and the first motor 267 drives the moving screw 268 to rotate, thereby driving the moving plate 266 to move, and then the scraper 2661 cleans the scum on the water surface. The cleaned scum will be accumulated in the slag storage area 2665 for later cleaning. The produced water of the flotation tank 21 enters the sedimentation tank 22, and is precipitated in the sedimentation tank 22. The produced water overflows into the water storage tank 23, and then the staff starts the filter booster pump 32. The produced water is transported to the quartz sand filter 31 through the water storage tank 23 for primary filtration, and then transported to the activated carbon filter 33 for secondary filtration. The produced water of the activated carbon filter 33 is transported to the security filter 34 again, and finally passes through the ultrafiltration membrane device 41 in the clean water tank 42 and the reverse osmosis device 5 in the clean water tank 42 in turn, thereby realizing the treatment of the wastewater.

[0045] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wastewater treatment device for cleaning cast aluminum automobile workpieces, comprising: A raw water tank (1), used for storing wastewater to be treated; An integrated flotation and sedimentation machine (2) for removing suspended solids and oil from wastewater; A quartz sand filter (31) is used to further remove suspended matter from the wastewater; An activated carbon filter (33) for removing organic matter from wastewater; An ultrafiltration membrane device (41) is used to remove ions and small molecular organic matter from wastewater; The water production tank (4) is used to store treated water, and is characterized in that: a clean water tank (42) is provided on one side of the water production tank (4), a high-pressure pump (43) is provided between the clean water tank (42) and the water production tank (4), and is used to transport water from the water production tank (4) to the clean water tank (42), and a reverse osmosis device (5) is installed in the clean water tank (42).

2. A wastewater treatment equipment for cleaning cast aluminum automobile workpieces according to claim 1, characterized in that: The top end of the raw water tank (1) is connected to a water supply pipe (11), and a rotating motor (12) is provided at the top end of the raw water tank (1). The output shaft of the rotating motor (12) passes through the raw water tank (1) and is coaxially fixedly connected to a rotating shaft (13), and a plurality of stirring blades (14) are provided on the rotating shaft (13).

3. The wastewater treatment equipment for cleaning cast aluminum automobile workpieces according to claim 1 is characterized in that: The air flotation and sedimentation integrated machine (2) comprises an air flotation tank (21), a sedimentation tank (22) and a water storage tank (23); the bottom end of the air flotation tank (21) is connected to the sedimentation tank (22) via a pipeline; the top end of the sedimentation tank (22) is connected to the water storage tank (23) via a pipeline; the top end of the air flotation tank (21) is connected to a raw water tank (1) via a pipeline; and a first booster pump (24) is provided for conveying wastewater from the raw water tank (1) to the air flotation tank (21); the upper end surface of the air flotation tank (21) is connected to a dosing pipe (25); and a cleaning component (26) for cleaning scum is provided in the air flotation tank (21).

4. A wastewater treatment equipment for cleaning cast aluminum automobile workpieces according to claim 3, characterized in that: The cleaning assembly (26) comprises two lifting plates (261), the two lifting plates (261) are arranged opposite to each other in the flotation tank (21), each lifting plate (261) is provided with a lifting screw (262), a sliding plate (263) is slidably connected to the lifting plate (261), the sliding plate (263) is threadedly connected to the lifting screw (262), the sliding plate (263) is slidably connected to the lifting plate (261), and a driving motor (263) is provided at the bottom of the flotation tank (21). 4), the output shaft of the driving motor (264) is coaxially fixedly connected to a connecting shaft (265), the connecting shaft (265) is extended along the length direction of the flotation tank (21), the connecting shaft (265) is connected to the lifting screw (262) via a bevel gear pair, a moving plate (266) is provided above the lifting plate (261), a first motor (267) is provided at the top of the flotation tank (21), and the output shaft of the first motor (267) passes through the flotation tank (21) and is coaxially fixedly connected to the connecting shaft (265). A movable screw rod (268) is connected, a stop rod (269) is provided on one side of the movable screw rod (268), two ends of the movable screw rod (268) and the stop rod (269) are respectively connected to two side walls in the air flotation tank (21), the movable plate (266) is threadedly connected to the movable screw rod (268), the movable plate (266) is slidably connected to the stop rod (269), the movable plate (266) is slidably connected to the air flotation tank (21), and a scraper (266) is provided below the movable plate (266). 61), the scraper (2661) is arranged in an L-shape, one end of the scraper (2661) is hinged to the movable plate (266), and the other end is provided with an inclined surface (2662) for facilitating the cleaning of scum, baffles (2663) are provided on both sides of the scraper (2661), and an arched protrusion (2664) is further provided inside the scraper (2661), and the arched protrusion (2664), the scraper (2661) and the baffle (2663) form a slag storage area (2665) for collecting scum.

5. A wastewater treatment equipment for cleaning cast aluminum automobile workpieces according to claim 4, characterized in that: A positioning plate (2666) is provided on a side of the flotation tank (21) away from the moving motor, and is used to stop the scraper (2661). A collecting box (2667) is provided below the positioning plate (2666). One end of the collecting box (2667) is in contact with the sliding plate (263), and the other end is provided with a handle (2668). The collecting box (2667) is slidably connected to the flotation tank (21).

6. The wastewater treatment equipment for cleaning cast aluminum automobile workpieces according to claim 1 is characterized by: A filter booster pump (32) is provided between the quartz sand filter (31) and the water storage tank (23), and a side of the quartz sand filter (31) away from the water storage tank (23) is connected to the activated carbon filter (33) via a pipeline.

7. A wastewater treatment equipment for cleaning cast aluminum automobile workpieces according to claim 6, characterized in that: The side of the activated carbon filter (33) away from the quartz sand filter (31) is connected to a security filter (34), and the ultrafiltration membrane device (41) is arranged in the water production tank (4).

8. A treatment process, applied to a wastewater treatment device for cleaning cast aluminum automobile workpieces as claimed in any one of claims 1 to 7, comprising the following steps: S1: The wastewater first enters the raw water tank (1) through the water supply pipe (11), and then the rotating motor (12) is started. The rotating motor (12) drives the rotating shaft (13) to rotate, and then drives the stirring blade (14) to rotate, so as to achieve homogenization treatment of the wastewater in the raw water tank (1); S2: The sewage in the raw water tank (1) is transported to the flotation tank (21) of the flotation sedimentation integrated machine (2) through the first booster pump (24). Then, the staff starts the drive motor (264), which drives the connecting shaft (265) to rotate, thereby causing the sliding plate (263) in the lifting plate (261) to descend, so that water overflows into the space between the two lifting plates (261). Then, flocculants are added into the interior through the dosing pipe (25), and the flocculants enter the flotation tank (21) after mixing. At the bottom, the floccules are mixed with the released dissolved air water, so that the floccules adhere to the tiny bubbles. Under the action of the air buoyancy, the floccules float to the water surface to form scum on the water surface. After the scum accumulates to a certain thickness, the staff starts the first motor (267). The first motor (267) drives the moving screw (268) to rotate, thereby driving the moving plate (266) to move, and then the scraper (2661) cleans the scum on the water surface. The cleaned scum will be accumulated in the scum storage area (2665) for later cleaning; S3: The water treated in the flotation tank (21) enters the sedimentation tank (22), where it is precipitated and overflows into the water storage tank (23). Then, the staff starts the filter booster pump (32), and the produced water is transported through the water storage tank (23) to the quartz sand filter (31) for primary filtration, and then transported to the activated carbon filter (33) for secondary filtration; S4: The water treated by the activated carbon filter (33) is transported to the security filter (34) again, and finally passes through the ultrafiltration membrane device (41) in the clean water tank (42) and the reverse osmosis device (5) in the clean water tank (42) in sequence, thereby achieving the treatment of the wastewater.

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