A device and method for recycling wastewater from automobile phosphating workshop

Abstract

The present invention discloses a wastewater recycling device and method for automobile phosphating workshops, relating to the technical field of painting wastewater recycling. The present invention comprises a filter tube and a filter mounted at one end of the filter tube for filtering solid impurities in the phosphating wastewater. The present invention is also provided with a stirring device, an intermittent feeding device, a filtering device, a first ultraviolet decomposition box, a second ultraviolet decomposition box, and a denitrification device. The stirring device stirs the wastewater to which polymer drugs are added, allowing it to fully react. The filtering device is combined with the device to filter out flocculants. The first and second ultraviolet decomposition boxes are used to effectively decompose the added organic polymer drugs, reducing pollution. The denitrification device is combined with the device to effectively remove the added nitrate ions, achieving highly efficient pure water recovery. This greatly improves the automation and efficiency of phosphating wastewater treatment, while also improving the recovery efficiency of the phosphating wastewater. The wastewater is non-toxic and harmless during the recovery and disposal process, and the resulting pure water can be directly used in production.

Description

Technical Field

[0001] The invention belongs to the technical field of coating wastewater recovery, and in particular relates to a device and method for recovering wastewater from an automobile phosphating workshop. Background Art

[0002] Phosphating treatment is performed on automobiles in automotive phosphating workshops to improve the corrosion and wear resistance of steel. This process requires the use of phosphating solution, which produces wastewater containing heavy metal ions and non-metallic salt ions. Nickel ions in this wastewater are a Class I pollutant, and phosphate ions can cause eutrophication. Wastewater containing nickel and phosphate ions cannot be directly treated in sewage treatment plants.

[0003] Currently, the primary treatment method involves manual mixing of chemical solutions, which then passes through multiple sedimentation tanks. This is labor-intensive, requires significant floor space, and is time-consuming and labor-intensive. Furthermore, most current phosphating wastewater treatment methods rely on pre-treatment, resulting in low water circulation rates, insufficient pollution control, and often discontinuation of treatment before discharge standards are met.

[0004] To this end, we designed a wastewater recycling device and method for automobile phosphating workshop to solve the above problems. Summary of the Invention

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a wastewater recycling device for automobile phosphating workshops, comprising a filter tube, a first reaction barrel, a second reaction barrel, a first filter barrel, a first ultraviolet decomposition box, a carbon dioxide gas cylinder, a third reaction barrel, a denitrification device, and a pure water pool. The outlet of the filter tube is connected to the first reaction barrel, the outlet of the first reaction barrel is connected to the second reaction barrel, and the outlet of the second reaction barrel is connected to the first filter barrel. Most heavy metal ions and non-metallic salt ions in the wastewater of the phosphating workshop can be removed through the first reaction barrel, the second reaction barrel, and the first filter barrel. The outlet of the first filter barrel is connected to the first ultraviolet decomposition box, and the first ultraviolet decomposition box can effectively decompose PAM in the water. The outlet of the first ultraviolet decomposition box is connected to the second reaction barrel, the air inlet of the third reaction barrel is connected to the carbon dioxide storage cylinder, the outlet of the third reaction barrel is connected to the second filter barrel, and the chloride ions and calcium ions in the water can be removed through the third reaction barrel and the second filter barrel. The outlet of the second filter barrel is connected to the denitrification device, and the nitrate ions in the water can be reduced to nitrogen gas, which is non-toxic and harmless. The outlet of the denitrification device is connected to the second ultraviolet decomposition box. The purpose of setting up the second ultraviolet decomposition box is to sterilize and decompose organic matter. The outlet of the second ultraviolet decomposition box is connected to the pure water pool. The first ultraviolet decomposition box and the second ultraviolet decomposition box are both provided with waterproof ultraviolet lamps.

[0007] Preferably, a first filter is installed at one end of the filter tube, and the first filter includes a filter tube body and two layers of first filter screens and a layer of first filter sponge arranged inside the filter tube body. The first filter sponge is placed between the two layers of first filter screens, and the edge of the first filter screen is fixedly connected to the filter tube body. A water supply pump is connected to the filter tube, and a first one-way throttle valve is installed on one side of the water supply pump. The first one-way throttle valve is installed on the filter tube.

[0008] Preferably, the third reaction barrel includes a motor, a reducer, a coupling, a fixed barrel body, a first fixed bracket, a second gear, a first crank and a second crank, the fixed barrel body is installed inside the first fixed bracket, a stirring device is provided inside the fixed barrel body, an intermittent feeding device is provided on the upper side of the fixed barrel body, the fixed barrel body includes a fixed barrel and a fixed barrel cover provided on the upper port of the fixed barrel, a guide hole is provided at the top center of the fixed barrel cover, fixing holes are provided around the guide hole, a feed hole is provided on the outside of the fixing hole, and a liquid inlet is provided on the upper circumference of the fixed barrel. Mouth and liquid outlet, a sealed barrel is installed inside the fixed barrel, the lower part of the sealed barrel is a mesh structure, the upper part of the sealed barrel is fixed to the inner surface of the fixed barrel cover through a fixing hole, one end of the first crank is fixedly connected to the first rotating shaft, the middle part of the first rotating shaft is installed with a first gear, one end of the first rotating shaft and the output shaft of the reducer are connected to each other through a coupling 9-3, the input shaft of the reducer is connected to the motor, the first gear and the second gear are staggered, the second gear is fixed with a second rotating shaft, and one end of the second rotating shaft is fixedly connected to the second crank.

[0009] Preferably, the intermittent feeding device includes a feeding platform, an upper fixed plate, a lower fixed plate, a tensile rope and a compression spring, a storage funnel is provided above the feeding platform, a first regulating valve is provided at the outlet of the storage funnel, the feeding platform is fixed by the upper fixed plate and the lower fixed plate, guide holes are left on the upper side of the upper fixed plate and on both sides of the lower fixed plate, a fixing hole is left on one side of the lower fixed plate, the intermittent feeding device is installed on the first fixed bracket through the lower fixed plate, a feeding funnel is provided below the discharge port of the feeding platform, the discharge port of the feeding funnel is installed at the feed port of the fixed barrel body, a pushing plate is installed inside the feeding platform, a pushing rod is installed on the pushing plate, a fixing hole is opened at the tail of the pushing rod, one end of the tensile rope is fixed in the fixing hole, and the other end is connected to the second crank through the guide holes of the upper fixed plate and the lower fixed plate, one end of the compression spring is fixed at the fixing hole at the tail of the pushing rod, and the other end is fixed in the fixing hole of the lower fixed plate.

[0010] Preferably, the stirring device includes a lifting and fixing frame, a ball joint, a lifting rod, a stirring rod and a sealing ring. The lifting and fixing frame is installed on the outside of the fixed barrel body, and the upper part of the lifting and fixing frame is connected to the lifting rod through the ball joint body. The end of the lifting rod away from the ball joint body is connected to the first crank, the middle part of the lifting rod is connected to the stirring rod, one end of the stirring rod is connected to the sealing ring, and one end of the stirring rod and the sealing ring are placed together inside the sealed barrel. A fixing bolt 1 is provided between the end of the ball joint body away from the lifting rod and the upper part of the lifting and fixing frame, and a fixing bolt 2 is connected between the upper end of the stirring rod and the lifting rod.

[0011] Preferably, the second filter barrel includes a filter barrel body and a second fixed bracket, the filter barrel body is installed on the second fixed bracket, a filter barrel cover is installed on the filter barrel body, a second filter is provided on the inner side of the filter barrel cover, the second filter includes two layers of second filter mesh and one layer of second filter sponge, and the second filter sponge is installed between the two layers of second filter mesh.

[0012] Preferably, the denitrification device includes a denitrification box, an overflow valve, a first electromagnetic reversing valve, a circulating water pump and a box body, a rubber sleeve is provided at the bottom of the denitrification device, a reverse osmosis bottle is installed inside the denitrification device, the liquid inlet of the reverse osmosis bottle is connected to the liquid inlet of the denitrification device, the concentrated liquid outlet of the reverse osmosis bottle is connected to the denitrification box, three layers of third filter sponges are installed at the bottom of the denitrification box, denitrifying bacteria are placed above the third filter sponge, a liquid outlet is opened at the bottom of the denitrification box, the liquid outlet of the denitrification box is connected to the overflow valve, and the overflow valve is connected to the first The inlets of the electromagnetic reversing valves are interconnected, one inlet of the first electromagnetic reversing valve is interconnected with the pure water tank, a one-way throttle valve is provided between the inlet of the first electromagnetic reversing valve and the pure water tank, the outlet of the first electromagnetic reversing valve is interconnected with the circulating water pump, the outlet of the circulating water pump is interconnected with the liquid inlet of the reverse osmosis bottle, a storage bottle is provided outside the denitrification device, a second regulating valve is provided at the discharge port of the storage bottle, the discharge port of the storage bottle is installed on the outside side of the box body, methanol is placed inside the storage bottle, a knob switch is installed on the outside side of the box body, and an opening and closing door is installed on the outside side of the box body.

[0013] Preferably, a one-way throttle valve is connected in sequence between the first reaction barrel, the second reaction barrel, the first filter barrel, the first ultraviolet decomposition box, the third reaction barrel, the denitrification device, the second ultraviolet decomposition box, and the pure water pool, and a solenoid valve is connected between the carbon dioxide storage cylinder and the third reaction barrel.

[0014] A method for recycling wastewater from an automobile phosphating workshop comprises the following steps:

[0015] a. Pretreatment step: preliminarily treat the phosphating wastewater, remove solid particles in the phosphating wastewater using a filter tube, and introduce the pretreated phosphating wastewater into the first reaction barrel;

[0016] b. Heavy metal ion and non-metallic salt ion removal step: The pretreated phosphating wastewater flows into the first reaction barrel, PAC and lime are added in sequence, and after sufficient reaction, it flows into the second reaction barrel, PAM is added and fully reacted, and then it is introduced into the first filter barrel for filtration. The filtrate passes through the first ultraviolet decomposition box to decompose the excess PAM in the wastewater, and then it is introduced into the third reaction barrel, and silver nitrate and carbon dioxide are added in sequence. After sufficient reaction, it is introduced into the second filter barrel for filtration, and the filtrate is introduced into the denitrification device;

[0017] c. Denitrification treatment step: treating the liquid introduced into the denitrification device, converting nitrate ions in the water into harmless nitrogen gas, and obtaining pure water, which is then introduced into the second UV decomposition box;

[0018] d. Ultraviolet treatment step: the pure water is introduced into the second ultraviolet decomposition box for sterilization and decomposition treatment, and the treated water is introduced into the pure water pool.

[0019] Preferably, the liquid flowing into the denitrification device in the denitrification treatment step first passes through the reverse osmosis bottle, and the concentrated liquid in the reverse osmosis bottle flows to the denitrification tank. An organic carbon source medicine box is placed outside the denitrification tank. The organic carbon source medicine box is intermittently fed, and after denitrification treatment, it is filtered, and the filtrate flows back to the liquid inlet of the reverse osmosis bottle. The pure water liquid in the reverse osmosis bottle flows to the pure water tank, and the reverse osmosis bottle can be cleaned by the liquid in the pure water tank.

[0020] The present invention has the following beneficial effects:

[0021] 1. Applying the filter tube to the wastewater before transportation to filter the solid waste in the phosphating wastewater can protect the equipment and ensure the sealing performance of the mixing barrel and the sealing ring in the mixing device, thereby extending the service life of the water pump and the sealing ring and reducing the replacement frequency;

[0022] 2. By setting up an intermittent feeding device and a stirring device on the reaction barrel, it can adapt to a variety of drug combinations, and by replacing or modifying the power distribution, it can meet diversified needs;

[0023] 3. By introducing the ultraviolet decomposition box, organic matter can be effectively decomposed to reduce pollution;

[0024] 4. By setting up a denitrification device, nitrate ions in the liquid can be effectively removed, and a large proportion of pure water can be recovered. The waste gas generated is nitrogen, which is non-toxic and harmless. The denitrification device can also realize the self-cleaning of the reverse osmosis bottle, greatly reducing the maintenance frequency of the reverse filtration bottle.

[0025] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 Flowchart of the present invention;

[0028] Figure 2 This is a schematic diagram of the overall installation structure of the present invention;

[0029] Figure 3 is a cross-sectional view of the filter tube head of the present invention;

[0030] Figure 4 This is a schematic diagram of the installation of the reaction barrel of the present invention;

[0031] Figure 5 This is a schematic diagram of the installation structure of the fixed barrel of the present invention;

[0032] Figure 6 This is a schematic diagram of the installation structure of the intermittent feeding device of the present invention;

[0033] Figure 7 Schematic diagram of the installation structure of the stirring device of the present invention;

[0034] Figure 8 This is a schematic diagram of the installation structure of the filter barrel of the present invention;

[0035] Figure 9 This is a schematic diagram of the installation of the denitrification device of the present invention.

[0036] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0037] 1. Filter tube; 1-1. First filter screen; 1-2. First filter sponge; 1-3. Filter tube body; 2. Water supply pump; 3. First one-way throttle valve; 4. First reaction tank; 5. Second reaction tank; 6. First filter tank; 7. First UV decomposition box; 8. Carbon dioxide storage cylinder; 9. Third reaction tank; 9-1. Motor; 9-2. Reducer; 9-3. Coupling; 9-4. First gear; 9-5. Second gear; 9-6. First crank; 9-7. Second crank; 9-8, stirring device; 9-8-1, lifting bracket; 9-8-2, fixing bolt 1; 9-8-3, ball joint; 9-8-4, lifting rod; 9-8-5, fixing bolt 2; 9-8-6, stirring rod; 9-8-7, sealing ring; 9-9, intermittent feeding device; 9-9-1, push plate; 9-9-2, stretch rope; 9-9-3, push rod; 9-9-4, compression spring; 9-9-5, lower fixing plate; 9-96, storage Feed funnel; 9-9-7, first regulating valve; 9-9-8, upper fixed plate; 9-9-9, feed platform; 9-9-10, feed funnel; 9-10, fixed barrel; 9-10-1, fixed barrel cover; 9-10-2, sealed barrel; 9-10-3, fixed barrel; 9-11, first fixed bracket; 10, second filter barrel; 10-1, second filter screen; 10-2, second filter sponge; 10-3, filter barrel cover; 10-4, filter barrel; 10 -5, second fixed bracket; 11, denitrification device; 11-1, reverse osmosis bottle; 11-2, storage bottle; 11-3, second regulating valve; 11-4, denitrification tank; 11-5, denitrifying bacteria; 11-6, third filter sponge; 11-7, overflow valve; 11-8, first solenoid reversing valve; 11-9, circulating water pump; 11-10, rubber sleeve; 11-11, pure water tank; 11-12, tank body; 12, second UV decomposition tank; 13, pure water pool. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0040] See also Figure 1-Figure 2, connect the water outlet of the phosphating tank to the water inlet of the filter tube 1, and supply water to the first reaction barrel 4 through the water supply pump 2 through the waste liquid outlet. The first reaction barrel 4 is equipped with a stirring device 9-8 and two intermittent feeding devices 9-9. The two intermittent feeding devices 9-9 are respectively stored with PAC and lime. The water outlet of the first reaction barrel 4 is connected to the external second water pump. The second reaction barrel 5 is supplied with water through the second water pump. The second reaction barrel 5 is equipped with a stirring device 9-8 and an intermittent feeding device 9-9. The intermittent feeding device 9-9 is stored with PAM. The intermittent feeding devices 9-9 and the stirring device 9-8 of the first reaction barrel 4 and the second reaction barrel 5 share a set of power source. The metal ions and non-metallic salt ions in the waste liquid are removed through the first reaction barrel 4 and the second reaction barrel 5;

[0041] The water outlet of the second reaction barrel 5 is connected to the external third water pump, the first filter barrel 6 is supplied with water by the third water pump, the first filter barrel 6 performs solid-liquid separation, the water outlet of the first filter barrel 6 is connected to the external fourth water pump, the first ultraviolet decomposition box 7 is supplied with water by the fourth water pump, the organic solute in the liquid is decomposed by the first ultraviolet decomposition box 7, the water outlet of the first ultraviolet decomposition box 7 is connected to the external fifth water pump, and the third reaction barrel 9 is supplied with water by the fifth water pump;

[0042] The third reaction barrel 9 is equipped with a stirring device 9-8 and an intermittent feeding device 9-9, and silver nitrate powder is stored on the intermittent feeding device 9-9. The top of the third reaction barrel 9 is also connected to the outlet pipe of the carbon dioxide gas storage bottle 8. The ventilation of the carbon dioxide gas storage bottle 8 is controlled by the electromagnetic valve on the outlet pipe. Silver nitrate powder is first added and fully stirred, and then carbon dioxide is introduced. The ions added during the reaction of the first reaction barrel 4 and the second reaction barrel 5 can be removed through the third reaction barrel 9. The water outlet of the third reaction barrel 9 is interconnected with the external sixth water pump. The second filter barrel 10 is supplied with water through the sixth water pump. The second filter barrel 10 is Solid-liquid separation, the water outlet of the second filter barrel 10 is interconnected with the external seventh water pump, the denitrification device 11 is supplied with water through the seventh water pump, the denitrification device 11 will reduce nitrate ions in the liquid to nitrogen gas, the water outlet of the denitrification device 11 is interconnected with the external eighth water pump, the second ultraviolet decomposition box 12 is supplied with water through the eighth water pump, the second ultraviolet decomposition box 12 can decompose the organic carbon source that may exist in the denitrification device 11, the water outlet of the second ultraviolet decomposition box 12 is interconnected with the ninth water pump, the pure water pool 13 is supplied with water through the ninth water pump, the pure water pool 13 is interconnected with the tenth water pump, and the phosphating tank is supplied with water through the tenth water pump;

[0043] The first reaction barrel 4 , the second reaction barrel 5 , the first ultraviolet decomposition box 7 , the third reaction barrel 9 , the denitrification device 11 , the second ultraviolet decomposition box 12 and the water inlet of the pure water pool 13 are all installed with a one-way throttle valve.

[0044] See also Figure 3A first filter is installed at one end of the filter tube 1, and the first filter includes a filter tube body 1-3 and two layers of first filter mesh 1-1 and a layer of first filter sponge 1-2 arranged inside the filter tube body 1-3. The first filter sponge 1-2 is placed between the two layers of first filter mesh 1-1, and the edge of the first filter mesh 1-1 is fixedly connected to the filter tube body 1-3. A water supply pump 2 is connected to the filter tube 1, and a first one-way throttle valve 3 is installed on one side of the water supply pump 2. The first one-way throttle valve 3 is installed on the filter tube 1. Large particles of impurities in the phosphating pool wastewater can be removed through the first filter.

[0045] See also Figure 4-Figure 5 The third reaction barrel 9 includes a motor 9-1, a reducer 9-2, a coupling 9-3, a fixed barrel body 9-10, a first fixed bracket 9-11, a second gear 9-5, a first crank 9-6 and a second crank 9-7. The fixed barrel body 9-10 is installed inside the first fixed bracket 9-11. A stirring device 9-8 is provided inside the fixed barrel body 9-10. An intermittent feeding device 9-9 is provided on the upper side of the fixed barrel body 9-10. The fixed barrel body 9-10 includes a fixed barrel 9-10-3 and a fixed barrel cover 9-10-1 arranged at the upper port of the fixed barrel 9-10-3. A guide hole is provided at the top center of the fixed barrel cover 9-10-1, and fixing holes are provided around the guide hole. A feed hole is provided on the outside of the fixed hole. A liquid inlet and a liquid outlet are provided on the upper circumference of the fixed barrel 9-10-3. The fixed barrel 9-10-3 is provided with a liquid inlet and a liquid outlet. A sealing barrel 9-10-2 is installed inside 0-3. The lower part of the sealing barrel 9-10-2 is a mesh structure. The upper part of the sealing barrel 9-10-2 is fixed to the inner surface of the fixed barrel cover 9-10-1 through a fixing hole. One end of the first crank 9-6 is fixedly connected to the first rotating shaft. The middle of the first rotating shaft is installed with a first gear 9-4. One end of the first rotating shaft and the output shaft of the reducer 9-2 are interconnected through a coupling 9-3. The input shaft of the reducer 9-2 is connected to the motor 9-1. The first gear 9-4 and the second gear 9-5 are staggered. The second rotating shaft is fixed on the second gear 9-5. One end of the second rotating shaft is fixedly connected to the second crank 9-7. The stirring device 9-8 and the intermittent feeding device 9-9 share a set of power sources, and the two are set in rhythm through the first gear 9-4 and the second gear 9-5.

[0046] See also Figure 6The intermittent feeding device 9-9 includes a feeding table 9-9-9, an upper fixed plate 9-9-8, a lower fixed plate 9-9-5, a stretching rope 9-9-2 and a compression spring 9-9-4. A storage funnel 9-9-6 is provided above the feeding table 9-9-9, and a first regulating valve 9-9-7 is provided at the outlet of the storage funnel 9-9-6. The feeding amount can be controlled by rotating the first regulating valve 9-9-7. The feeding table 9-9-9 is fixed by the upper fixed plate 9-9-8 and the lower fixed plate 9-9-5. Guide holes are provided on the upper side of the upper fixed plate 9-9-8 and on both sides of the lower fixed plate 9-9-5. A fixing hole is provided on one side of the lower fixed plate 9-9-5. The intermittent feeding device 9-9 is installed on the first fixed bracket 9-11 through the lower fixed plate 9-9-5. A feeding funnel 9-9-10 is provided below the discharge port of the feeding table 9-9-9. The discharge port of the feeding funnel 9-9-10 The material port is installed at the feed port of the fixed barrel body 9-10, and a push plate 9-9-1 is installed inside the feed table 9-9-9, and a push rod 9-9-3 is installed at the push plate 9-9-1. A fixing hole is opened at the tail of the push rod 9-9-3, one end of the stretching rope 9-9-2 is fixed in the fixing hole, and the other end is connected to the second crank 9-7 through the guide holes of the upper fixed plate 9-9-8 and the lower fixed plate 9-9-5. One end of the compression spring 9-9-4 is fixed at the fixing hole at the tail of the push rod 9-9-3, and the other end is fixed in the fixing hole of the lower fixed plate 9-9-5. The feeding action of the intermittent feeding device 9-9 is achieved by stretching the stretching rope 9-9-2, so that the push rod 9-9-3 pushes the push plate 9-9-1 to move, and the push plate 9-9-1 pushes the medicine to move. After the medicine falls into the feeding funnel 9-9-10, the compression spring 9-9-4 completes the rebound.

[0047] See also Figure 7, the stirring device 9-8 includes a lifting fixed frame 9-8-1, a ball joint body 9-8-3, a lifting rod 9-8-4, a stirring rod 9-8-6 and a sealing ring 9-8-7. The lifting fixed frame 9-8-1 is installed on the outside of the fixed barrel body 9-10. The upper part of the lifting fixed frame 9-8-1 is connected to the lifting rod 9-8-4 through the ball joint body 9-8-3. The end of the lifting rod 9-8-4 away from the ball joint body 9-8-3 is connected to the first crank 9-6. The middle part of the lifting rod 9-8-4 is connected to the stirring rod 9-8-6. One end of the stirring rod 9-8-6 is connected to the sealing ring 9-8-7. One end of the stirring rod 9-8-6 and the sealing ring 9-8-7 are placed together in the sealing barrel 9-10-2. The ball joint body 9-8-3 is away from the lifting rod 9- A fixing bolt 1 9-8-2 is provided between one end of 8-4 and the upper part of the lifting fixed frame 9-8-1, and a fixing bolt 2 9-8-5 is connected between the upper end of the stirring rod 9-8-6 and the lifting rod 9-8-4. The stirring action of the stirring device 9-8 causes the lifting rod 9-8-4 to produce a lifting action through the first crank 9-6, and the lifting action of the lifting rod 9-8-4 drives the stirring rod 9-8-6 to complete the lifting action. The stirring rod 9-8-6, the sealing ring 9-8-7 and the sealing barrel 9-10-2 form a closed space. When the stirring rod 9-8-6 produces a lifting action, the closed space will generate positive pressure or negative pressure, and the liquid in the fixed barrel 9-10-3 will flow through the mesh structure under the sealing barrel 9-10-2 to form a stirring effect.

[0048] See also Figure 8 The second filter barrel 10 includes a filter barrel body 10-4 and a second fixed bracket 10-5. The filter barrel body 10-4 is installed on the second fixed bracket 10-5. A filter barrel cover 10-3 is installed on the filter barrel body 10-4. A second filter is provided on the inner side of the filter barrel cover 10-3. The second filter includes two layers of second filter mesh 10-1 and a layer of second filter sponge 10-2. The second filter sponge 10-2 is installed between the two layers of second filter mesh 10-1. Through the three-layer filter structure, solid particles in the liquid can be removed.

[0049] See also Figure 9The denitrification device 11 includes a denitrification box 11-4, an overflow valve 11-7, a first electromagnetic reversing valve 11-8, a circulating water pump 11-9 and a box body 11-12. A rubber sleeve 11-10 is provided at the bottom of the denitrification device 11. A reverse osmosis bottle 11-1 is installed inside the denitrification device 11. The liquid inlet of the reverse osmosis bottle 11-1 is connected to the liquid inlet of the denitrification device 11, and the concentrated liquid outlet of the reverse osmosis bottle 11-1 is connected to the denitrification box 11-4. The bottom of the box 11-4 is equipped with three layers of third filter sponges 11-6, and denitrifying bacteria 11-5 are placed above the third filter sponges 11-6. The denitrification reaction is carried out in the denitrification box 11-4. The solid particles are filtered by setting the third filter sponge 11-6. A liquid outlet is opened at the bottom of the denitrification box 11-4. The liquid outlet of the denitrification box 11-4 is connected to the overflow valve 11-7, and the overflow valve 11-7 is connected to the inlet of the first electromagnetic reversing valve 11-8. The first electromagnetic One inlet of the reversing valve 11-8 is interconnected with the pure water tank 11-11. A one-way throttle valve is provided between the inlet of the first electromagnetic reversing valve 11-8 and the pure water tank 11-11. The outlet of the first electromagnetic reversing valve 11-8 is interconnected with the circulating water pump 11-9. The denitrification liquid can be returned to the reverse osmosis bottle 11-1 through the first electromagnetic reversing valve 11-8. The water in the pure water tank 11-11 can also be used to clean the reverse osmosis bottle 11-1. A storage bottle 11-2 is provided on the outside of 11, and a second regulating valve 11-3 is provided at the discharge port of the storage bottle 11-2. The discharge port of the storage bottle 11-2 is installed on the outside of the box 11-12. Methanol is placed inside the storage bottle 11-2. A knob switch is installed on the outside of the box 11-12. The first electromagnetic reversing valve 11-8 and the circulating water pump 11-9 are controlled by the knob switch. An opening and closing door is installed on the outside of the box 11-12, and the device can be inspected by opening and closing the door.

[0050] It should be further explained that the installation structure, connection method or setting method of each component in the present invention are all common mechanical methods, and can be implemented as long as they can achieve their beneficial effects.

[0051] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0052] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A wastewater recycling device for an automobile phosphating workshop, comprising a filter tube (1), a first reaction barrel (4), a second reaction barrel (5), a first filter barrel (6), a first ultraviolet decomposition box (7), a carbon dioxide gas cylinder (8), a third reaction barrel (9), a denitrification device (11) and a pure water pool (13), characterized in that: The outlet of the filter tube (1) is connected to the first reaction barrel (4), the outlet of the first reaction barrel (4) is connected to the second reaction barrel (5), the outlet of the second reaction barrel (5) is connected to the first filter barrel (6), the outlet of the first filter barrel (6) is connected to the first ultraviolet decomposition box (7), the outlet of the first ultraviolet decomposition box (7) is connected to the second reaction barrel (5), the air inlet of the third reaction barrel (9) is connected to the carbon dioxide gas storage cylinder (8), the outlet of the third reaction barrel (9) is connected to the second filter barrel (10), the outlet of the second filter barrel (10) is connected to the denitrification device (11), the outlet of the denitrification device (11) is connected to the second ultraviolet decomposition box (12), the outlet of the second ultraviolet decomposition box (12) is connected to the pure water pool (13), and the first ultraviolet decomposition box (7) and the second ultraviolet decomposition box (12) are both provided with waterproof ultraviolet lamps; The third reaction barrel (9) comprises a motor (9-1), a reducer (9-2), a coupling (9-3), a fixed barrel body (9-10), a first fixed bracket (9-11), a second gear (9-5), a first crank (9-6), and a second crank (9-7); the fixed barrel body (9-10) is installed inside the first fixed bracket (9-11); a stirring device (9-8) is provided inside the fixed barrel body (9-10); and an intermittent feeding device (9-9) is provided on the upper side of the fixed barrel body (9-10); The intermittent feeding device (9-9) includes a feeding platform (9-9-9), an upper fixed plate (9-9-8), a lower fixed plate (9-9-5), a stretching rope (9-9-2) and a compression spring (9-9-4). A storage funnel (9-9-6) is provided above the feeding platform (9-9-9). A first regulating valve (9-9-7) is provided at the outlet of the storage funnel (9-9-6). The feeding platform (9-9-9) is fixed by an upper fixed plate (9-9-8) and a lower fixed plate (9-9-5). Guide holes are provided on the upper side of the upper fixed plate (9-9-8) and on both sides of the lower fixed plate (9-9-5). A fixing hole is provided on one side of the lower fixed plate (9-9-5). The intermittent feeding device (9-9) is installed with a first fixing bracket (9-11) through the lower fixed plate (9-9-5). A feeding funnel (9-9-10) is provided below the discharge port of the feeding platform (9-9-9), the discharge port of the feeding funnel (9-9-10) is installed at the feed port of the fixed barrel body (9-10), a pushing plate (9-9-1) is installed inside the feeding platform (9-9-9), a pushing rod (9-9-3) is installed at the pushing plate (9-9-1), a fixing hole is opened at the tail of the pushing rod (9-9-3), one end of the stretching rope (9-9-2) is fixed in the fixing hole, and the other end is connected to the second crank (9-7) through the guide holes of the upper fixing plate (9-9-8) and the lower fixing plate (9-9-5), one end of the compression spring (9-9-4) is fixed at the fixing hole at the tail of the pushing rod (9-9-3), and the other end is fixed in the fixing hole of the lower fixing plate (9-9-5); The stirring device (9-8) comprises a lifting fixed frame (9-8-1), a ball joint (9-8-3), a lifting rod (9-8-4), a stirring rod (9-8-6) and a sealing ring (9-8-7).

2. The automobile phosphating workshop wastewater recycling device according to claim 1, characterized in that: A first filter is installed at one end of the filter tube (1), the first filter comprising a filter tube body (1-3) and two layers of first filter screens (1-1) and a layer of first filter sponge (1-2) arranged inside the filter tube body (1-3), the first filter sponge (1-2) being placed between the two layers of first filter screens (1-1), the edge of the first filter screen (1-1) and the filter tube body (1-3) being fixedly connected to each other, the filter tube (1) being connected to a water supply pump (2), and a first one-way throttle valve (3) being installed on one side of the water supply pump (2), the first one-way throttle valve (3) being installed on the filter tube (1).

3. The automobile phosphating workshop wastewater recycling device according to claim 2, characterized in that: The fixed barrel body (9-10) includes a fixed barrel (9-10-3) and a fixed barrel cover (9-10-1) arranged on the upper end of the fixed barrel (9-10-3), a guide hole is opened at the top center of the fixed barrel cover (9-10-1), fixing holes are opened around the guide hole, a feed hole is opened on the outer side of the fixing hole, a liquid inlet and a liquid outlet are opened on the upper part of the circumference of the fixed barrel (9-10-3), a sealing barrel (9-10-2) is installed inside the fixed barrel (9-10-3), the lower part of the sealing barrel (9-10-2) is a mesh structure, and the upper part of the sealing barrel (9-10-2) is a mesh structure. It is fixed to the inner surface of the fixed barrel cover (9-10-1) through a fixing hole, one end of the first crank (9-6) is fixedly connected to the first rotating shaft, and a first gear (9-4) is installed in the middle of the first rotating shaft. One end of the first rotating shaft is connected to the output shaft of the reducer (9-2) through a coupling 9-3, and the input shaft of the reducer (9-2) is connected to the motor (9-1). The first gear (9-4) and the second gear (9-5) are arranged in an alternating manner, and a second rotating shaft is fixed to the second gear (9-5), and one end of the second rotating shaft is fixedly connected to the second crank (9-7).

4. The automobile phosphating workshop wastewater recycling device according to claim 3, characterized in that: The lifting and fixing frame (9-8-1) is installed outside the fixed barrel (9-10), and the upper part of the lifting and fixing frame (9-8-1) is connected to the lifting rod (9-8-4) through the ball joint (9-8-3). The end of the lifting rod (9-8-4) away from the ball joint (9-8-3) is connected to the first crank (9-6). The middle part of the lifting rod (9-8-4) is connected to the stirring rod (9-8-6). One end of the stirring rod (9-8-6) is connected to the sealing ring. (9-8-7) are connected to each other, one end of the stirring rod (9-8-6) and the sealing ring (9-8-7) are placed together in the sealing barrel (9-10-2), a fixing bolt 1 (9-8-2) is provided between the end of the ball hinge (9-8-3) away from the lifting rod (9-8-4) and the upper part of the lifting fixed frame (9-8-1), and a fixing bolt 2 (9-8-5) is connected between the upper end of the stirring rod (9-8-6) and the lifting rod (9-8-4).

5. The automobile phosphating workshop wastewater recycling device according to claim 4, characterized in that: The second filter barrel (10) comprises a filter barrel body (10-4) and a second fixing bracket (10-5), the filter barrel body (10-4) is mounted on the second fixing bracket (10-5), a filter barrel cover (10-3) is mounted on the filter barrel body (10-4), a second filter is provided on the inner side of the filter barrel cover (10-3), the second filter comprises two layers of second filter screens (10-1) and a layer of second filter sponge (10-2), and the second filter sponge (10-2) is mounted between the two layers of second filter screens (10-1).

6. The automobile phosphating workshop wastewater recycling device according to claim 5, characterized in that: The denitrification device (11) comprises a denitrification box (11-4), an overflow valve (11-7), a first electromagnetic reversing valve (11-8), a circulating water pump (11-9) and a box body (11-12). A rubber sleeve (11-10) is provided at the bottom of the denitrification device (11). A reverse osmosis bottle (11-1) is installed inside the denitrification device (11). The liquid inlet of the reverse osmosis bottle (11-1) is connected to the liquid inlet of the denitrification device (11). The concentrated liquid outlet of the reverse osmosis bottle (11-1) is communicated with the denitrification box (11-4), three layers of third filter sponges (11-6) are installed at the bottom of the denitrification box (11-4), denitrifying bacteria (11-5) are placed above the third filter sponges (11-6), a liquid outlet is opened at the bottom of the denitrification box (11-4), the liquid outlet of the denitrification box (11-4) is communicated with the overflow valve (11-7), and the overflow valve (11- 7) is interconnected with the inlet of the first electromagnetic reversing valve (11-8), one inlet of the first electromagnetic reversing valve (11-8) is interconnected with the pure water tank (11-11), a one-way throttle valve is provided between the inlet of the first electromagnetic reversing valve (11-8) and the pure water tank (11-11), the outlet of the first electromagnetic reversing valve (11-8) is interconnected with the circulating water pump (11-9), and the outlet of the circulating water pump (11-9) is interconnected with the reverse osmosis bottle (11-1) The liquid inlets are interconnected, a storage bottle (11-2) is provided outside the denitrification device (11), a second regulating valve (11-3) is provided at the discharge port of the storage bottle (11-2), the discharge port of the storage bottle (11-2) is installed on the outside side of the box (11-12), methanol is placed inside the storage bottle (11-2), a knob switch is installed on the outside side of the box (11-12), and an opening and closing door is installed on the outside side of the box (11-12).

7. The automobile phosphating workshop wastewater recycling device according to claim 6, characterized in that: One-way throttle valves are sequentially connected between the first reaction barrel (4), the second reaction barrel (5), the first filter barrel (6), the first ultraviolet decomposition box (7), the third reaction barrel (9), the denitrification device (11), the second ultraviolet decomposition box (12), and the pure water pool (13), and a solenoid valve is connected between the carbon dioxide storage cylinder (8) and the third reaction barrel (9).

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