Multistage treatment device and method for manganese sulfate wastewater containing benzoquinone

Abstract

The invention relates to the technical field of wastewater treatment, and particularly discloses a benzoquinone-containing manganese sulfate wastewater multi-stage treatment device and method.The benzoquinone-containing manganese sulfate wastewater multi-stage treatment method comprises the four steps of benzoquinone leaching removal, iron and nickel removal through neutralization, zinc and organic matter removal through vulcanization and standing, and meanwhile the benzoquinone-containing manganese sulfate wastewater multi-stage treatment device comprises a first neutralization barrel, a second neutralization barrel and a base; the first neutralizing barrel and the second neutralizing barrel are both arranged at the top of the base, a first stirring mechanism is arranged in the first neutralizing barrel, and an auxiliary sampling mechanism and a second stirring mechanism are arranged in the second neutralizing barrel respectively. According to the treatment device and the treatment method provided by the invention, the manganese sulfate wastewater can be deeply purified, so that organic matters and heavy metals in the manganese sulfate wastewater can be effectively removed, an electrolytic manganese product with the purity of 99.8% or above can be obtained through electrolysis after the manganese sulfate wastewater reaches the electrolysis standard, and various heavy metal indexes are qualified; and the method has the basis of improving the purity of the electrolytic manganese to 99.9%, has good environmental and economic benefits, and is beneficial to practical industrial application.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a multi-stage treatment device and method for manganese sulfate wastewater containing benzoquinone. Background Art

[0002] A large amount of manganese sulfate wastewater is generated in the process of producing hydroquinone by the aniline redox method. In the industry, it is generally electrolyzed into metallic manganese. If only relying on traditional purification treatment, it cannot remove organic matter and heavy metals such as benzoquinone and aniline sulfate in the wastewater. Benzoquinone and aniline sulfate will cause the cathode plate to turn black during electrolysis of the wastewater, and heavy metal zinc will cause the solution to melt and increase the pH value during electrolysis. Finally, the output of metallic manganese produced is low, the power consumption is increased, and the economic value and market recognition are very low.

[0003] Based on the above problems and needs, the present invention provides a multi-stage treatment device and method for manganese sulfate wastewater containing benzoquinone. By deeply purifying the manganese sulfate wastewater, organic matter and heavy metals in the wastewater can be effectively removed. After reaching the electrolysis standard, an electrolytic manganese product with a purity of more than 99.8% can be obtained after electrolysis. Various heavy metal indicators are also qualified, which has the basis for upgrading to electrolytic manganese with a purity of 99.9%. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to provide a multi-stage treatment device and method for manganese sulfate wastewater containing benzoquinone.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A multi-stage treatment method for manganese sulfate wastewater containing benzoquinone, the treatment method comprising the following steps: Step 1: Leaching and removing benzoquinone, put manganese sulfate wastewater and clean water into the first neutralization barrel at a ratio of 3:1, then heat and stir the mixed manganese sulfate wastewater. After the manganese sulfate wastewater is heated to 90°C, the benzoquinone in the manganese sulfate wastewater evaporates with the steam, then the manganese sulfate wastewater is closed and stirred for 6 hours, and the manganese sulfate wastewater is subjected to the first filter press; Step 2: Neutralization to remove iron and nickel, the manganese sulfate wastewater after the first filter press in step 1 is introduced into the second neutralization barrel for aeration, and then ammonia water, sodium thiamethoxam, industrial activated carbon and polyacrylamide are added to the second neutralization barrel in sequence, mixed and stirred, and then allowed to stand for 5 hours for the second filter press; Step 3: Sulfidation to remove zinc and organic matter, the manganese sulfate wastewater after the second filter press in step 2 is introduced into a sulfidation barrel, sulfuric acid, sodium sulfide, and polyacrylamide are added to the sulfidation barrel in sequence, mixed and stirred, and then precipitated for 5 hours for the third filter press; Step 4: Standing, in step 3, hydrogen peroxide is added to the manganese sulfate wastewater after the third filter press and the wastewater is allowed to stand for 24 hours. After the standing, the fourth fine filtration is performed to complete the purification of the manganese sulfate wastewater.

[0006] Optionally, a multi-stage treatment device for manganese sulfate wastewater containing benzoquinone is applied to the above-mentioned treatment method, and the device comprises a first neutralization barrel, a second neutralization barrel and a base, wherein the first neutralization barrel and the second neutralization barrel are both arranged on the top of the base, the top and the bottom of the first neutralization barrel are respectively provided with a first water inlet and a first outlet, the top of the first neutralization barrel is also provided with a plurality of steam outlets, a first stirring mechanism for stirring the manganese sulfate wastewater is arranged inside the first neutralization barrel, a second water inlet and a second outlet are respectively arranged on the top and the bottom of the second neutralization barrel, and an auxiliary sampling mechanism for facilitating sampling of the manganese sulfate wastewater and a second stirring mechanism are respectively arranged inside the second neutralization barrel.

[0007] Optionally, a mounting plate is installed between the first neutralization barrel and the second neutralization barrel, a water pump is installed on the top of the mounting plate, a first pipe and a second pipe are installed at the input end and the output end of the water pump respectively, and the first pipe and the second pipe extend to the interior of the first neutralization barrel and the second neutralization barrel respectively at one end away from the water pump.

[0008] Optionally, the first stirring mechanism includes a first motor installed on the top of the first neutralization barrel, the output end of the first motor passes through the first neutralization barrel and is connected to a first rotating shaft, and a plurality of first stirring blades are installed on the outer wall of the first rotating shaft.

[0009] Optionally, the second stirring mechanism includes a second motor installed inside the base, the output end of the second motor passes through the second neutralization barrel and is connected to a second rotating shaft, and a plurality of second stirring blades are installed on the outer wall of the second rotating shaft.

[0010] Optionally, the auxiliary sampling mechanism includes a third motor installed on the top of the second neutralization barrel, the output end of the third motor passes through the second neutralization barrel and is connected to a third rotating shaft, the outer wall of the third rotating shaft is provided with a plurality of limit grooves, and a movable frame is provided inside the second neutralization barrel, and the movable frame slides up and down inside the limit grooves through a plurality of limit blocks provided on the inner wall.

[0011] Optionally, two fixed plates are installed on the top of the second neutralization barrel, and the outer walls on the side where the two fixed plates are close to each other are provided with sliding grooves, sliders are installed inside the two sliding grooves, sliding rods are installed at the bottom ends of the two sliders, connecting ends are installed at the bottom ends of the two sliding rods, and a circular groove that slides with the two connecting ends is opened on the top of the movable frame.

[0012] Optionally, two fixed seats are installed at the bottom end of the movable frame, and two rotating plates are rotatably installed inside the two fixed seats through connecting shafts. The outer walls at both ends of the two connecting shafts are equipped with torsion springs. The inside of the two rotating plates is provided with storage grooves, and the bottom ends of the two rotating plates are provided with multiple drainage holes connected to the storage grooves.

[0013] Optionally, a plurality of connecting rods are installed on the outer wall of the movable frame, and a circular cleaning brush is commonly installed on one end of the plurality of connecting rods away from the movable frame.

[0014] Optionally, two rectangular grooves are opened inside the movable frame, and a fourth motor is installed inside the two rectangular grooves. Winding wheels are installed at the output ends of the two fourth motors, and connecting ropes are wound on the surfaces of the two winding wheels. The ends of the two connecting ropes away from the winding wheels are connected to the rotating plate close to them.

[0015] The beneficial effects of the present invention are: 1. The treatment device and treatment method provided in the present invention can deeply purify manganese sulfate wastewater, thereby effectively removing organic matter and heavy metals in the manganese sulfate wastewater. After reaching the electrolysis standard, an electrolytic manganese product with a purity of more than 99.8% can be obtained after electrolysis. Various heavy metal indicators are also qualified, which has the basis for upgrading to electrolytic manganese with a purity of 99.9%, has good environmental and economic benefits, and is conducive to practical industrial applications.

[0016] 2. In the present invention, when it is necessary to sample and test the wastewater in the second neutralization barrel, through the cooperation of multiple components of the auxiliary sampling mechanism arranged inside the second neutralization barrel, after the wastewater enters the storage tank, one of the rotating plates moves to directly below the second water inlet, and the staff can insert the bottom end of the sampling test tube into one of the storage tanks through the second water inlet to quickly sample the wastewater collected in the storage tank, thereby avoiding the problem that the wastewater level inside the second neutralization barrel is low and it is inconvenient to manually use a test tube for sampling, thereby improving the staff's sampling efficiency of the wastewater and facilitating rapid testing of the wastewater.

[0017] 3. In the present invention, in the process of mixing and stirring the wastewater and other additives by the second stirring mechanism, more foam will inevitably be produced on the surface of the wastewater. In order to prevent the additives in the foam from being mixed in the wastewater, resulting in a low reaction efficiency with the wastewater, the movable frame is immersed in the wastewater again until the two receiving tanks collect part of the wastewater, and then the movable frame is controlled to move upward to the top of the wastewater. As the third motor drives the movable frame to rotate, the multiple drainage holes at the bottom of the two rotating plates can sprinkle the wastewater collected in the receiving tank downward, defoam the foam on the surface of the wastewater, improve the efficiency of the mixing reaction between the additive and the wastewater, and facilitate the purification and removal of harmful substances in the wastewater.

[0018] 4. In the present invention, after the waste water inside the second neutralization barrel is discharged, in order to facilitate the subsequent use of the second neutralization barrel, the second neutralization barrel needs to be cleaned. At this time, the two sliders can be controlled to move up and down inside the corresponding slide grooves. With the help of the up and down movement of the two slide bars, the mobile frame can be driven to move up and down synchronously inside the second neutralization barrel, so that the cleaning brush arranged on the outer wall of the mobile frame can automatically clean the impurities attached to the inner wall of the second neutralization barrel during the up and down movement, so that the second neutralization barrel can be quickly put into use in the subsequent waste water purification process, thereby indirectly improving the efficiency of waste water treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of a multi-stage treatment device for manganese sulfate wastewater containing benzoquinone proposed by the present invention; Figure 2 for Figure 1 A structural cross-sectional view of the first neutralization barrel and the second neutralization barrel; Figure 3 This is a schematic diagram of the structure inside the second neutralization barrel of the present invention; Figure 4 is a structural schematic diagram of the second stirring mechanism in the present invention; Figure 5 It is a schematic diagram of the structure of one of the fixed plates and the sliding rod in the present invention; Figure 6 It is a schematic structural diagram of the movable frame and the third rotating shaft in the present invention; Figure 7 It is a structural schematic diagram of the bottom of the movable frame in the present invention; Figure 8 It is a schematic diagram of the structure of the two rotating plates in the present invention in the original state; Fig. 9 It is a structural cross-sectional view of the movable frame in the present invention.

[0021] In the figure: 1, base; 2, first neutralization barrel; 3, second neutralization barrel; 4, first motor; 5, third motor; 6, first water inlet; 7, steam outlet; 8, first outlet; 9, mounting plate; 10, first pipe; 11, second pipe; 12, second water inlet; 13, second outlet; 14, fixing plate; 15, sliding rod; 16, first rotating shaft; 17, first stirring blade; 18, third rotating shaft; 19, second stirring blade; 20, second motor; 21, sliding block; 22, moving frame; 23, cleaning brush; 24, second rotating shaft; 25, sliding groove; 26, connecting end; 27, limiting groove; 28, circular groove; 29, connecting rod; 30, limiting block; 31, fixing seat; 32, rotating plate; 33, drainage hole; 34, storage groove; 35, rectangular groove; 36, fourth motor; 37, winding wheel; 38, connecting rope. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Reference Figure 1-Figure 9 A multi-stage treatment method for manganese sulfate wastewater containing benzoquinone, the treatment method comprising the following steps: Step 1: Leach out benzoquinone. First, measure the contents of manganese, sulfate, and ammonium sulfate in manganese sulfate wastewater. Usually, the content of manganese sulfate in manganese sulfate wastewater is 45g / L, the content of ammonium salt is 35g / L, and the pH value is 1.5. Put the manganese sulfate wastewater and clean water in the first neutralization barrel 2 at a ratio of 3:1, and then heat and stir the mixed manganese sulfate wastewater. After the manganese sulfate wastewater is heated to 90°C, the benzoquinone in the manganese sulfate wastewater evaporates with the steam. After the manganese sulfate wastewater maintains a temperature of 90°C and evaporates for 6 hours, the content of benzoquinone is detected. After the benzoquinone content in the manganese sulfate wastewater is qualified, turn off the stirring and let it stand for 6 hours to allow the reacted manganese ore impurities in the wastewater to precipitate. The manganese sulfate wastewater above the precipitate in the first neutralization barrel 2 is pumped out by a water pump and discharged into the second neutralization barrel 3. The precipitate is then discharged into the filter press through the first discharge port 8, and the first filter press is used for rough pressing. The manganese sulfate wastewater after filter pressing enters the second neutralization barrel 3 through the second water inlet 12; Step 2: Neutralization to remove iron and nickel, open the Roots blower and the air duct valve of the second neutralization barrel 3, aerate the manganese sulfate wastewater entering the second neutralization barrel 3, the aeration time is 60 minutes, and start adding ammonia water for neutralization. After adding ammonia water, when the pH value of the manganese sulfate wastewater reaches 5.9-6.0, turn off the ammonia water, stir for 30 minutes and then determine whether the iron is qualified again. After the iron is qualified, ensure that the temperature of the manganese sulfate wastewater drops to between 35℃-38℃, and use precision test paper to detect when the pH value reaches 6.4-6.6, confirm again that the temperature of the manganese sulfate wastewater in the second neutralization barrel 3 is between 35℃-38℃. After reaching the standard, sodium fumei is added, and the amount of sodium fumei added is 0.17 kg per cubic meter. After the addition of sodium fumei, the manganese sulfate wastewater is stirred for 40 minutes, and then the nickel is qualitatively detected. The manganese sulfate wastewater is qualified if there is no iron and no nickel, and samples are sent for quantitative testing. After the test is qualified, industrial activated carbon and polyacrylamide are added to the manganese sulfate wastewater. The amount of industrial activated carbon added is 1 kg per cubic meter, and the amount of polyacrylamide added is 7 g per cubic meter. Then the manganese sulfate wastewater is continued to be stirred for 1 hour. After the adsorption of industrial activated carbon and polyacrylamide in the manganese sulfate wastewater is completed, the stirring is turned off and the wastewater is allowed to stand for 5 hours for the second filter press; Step 3: Sulfidation to remove zinc and organic matter. After the manganese sulfate wastewater is qualified, it is pressed into a sulfidation barrel. When the temperature of the manganese sulfate wastewater drops below 50°C, sulfuric acid or anode liquid after filter pressing or precipitation is added for secondary neutralization to reduce the pH value of the manganese sulfate wastewater to about 5.0. After the pH value is reduced, the manganese sulfate wastewater is stirred for 10 minutes and sampled to detect the content of nickel, cobalt, zinc, and negative divalent sulfur. Then, 0.19 kg of sodium sulfide per cubic meter is added to remove zinc. If zinc sulfate rebound occurs, continue to add sodium sulfide for sulfidation treatment. After the various heavy metal indicators in the manganese sulfate wastewater are qualified, 14 g of polyacrylamide per cubic meter is added and stirred for 10 minutes. After the stirring is completed, it is precipitated for 5 hours. Finally, the manganese sulfate wastewater is subjected to a third filter press; Step 4: Standing, after the third filter press, hydrogen peroxide is added at a rate of 0.07 kg per cubic meter to the manganese sulfate wastewater, and the manganese sulfate wastewater is allowed to stand for 24 hours after the addition of hydrogen peroxide. After the manganese sulfate wastewater has stood for the fourth fine filtration, the purification treatment of the manganese sulfate wastewater is completed.

[0024] As a technical optimization scheme of the present invention, a multi-stage treatment device for manganese sulfate wastewater containing benzoquinone is provided, which is applied to the above-mentioned treatment method. The device comprises a first neutralization barrel 2, a second neutralization barrel 3 and a base 1. The first neutralization barrel 2 and the second neutralization barrel 3 are both arranged on the top of the base 1. The top and bottom of the first neutralization barrel 2 are respectively provided with a first water inlet 6 and a first outlet 8. The top of the first neutralization barrel 2 is also provided with a plurality of steam outlets 7. The interior of the first neutralization barrel 2 is provided with a first stirring mechanism for stirring the manganese sulfate wastewater. The top and bottom of the second neutralization barrel 3 are respectively provided with a second water inlet 12 and a second outlet 13. The interior of the second neutralization barrel 3 is respectively provided with an auxiliary sampling mechanism for facilitating sampling of the manganese sulfate wastewater and a second stirring mechanism.

[0025] As a technical optimization solution of the present invention, a mounting plate 9 is installed between the first neutralization barrel 2 and the second neutralization barrel 3, a water pump is installed on the top of the mounting plate 9, a first pipe 10 and a second pipe 11 are installed at the input end and the output end of the water pump, respectively, and the first pipe 10 and the second pipe 11 extend to the inside of the first neutralization barrel 2 and the second neutralization barrel 3 at one end away from the water pump. The wastewater after the sedimentation treatment in the first neutralization barrel 2 can be pumped out by the provided water pump and discharged to the inside of the second neutralization barrel 3 through the second pipe 11 for further treatment.

[0026] As a technical optimization solution of the present invention, the first stirring mechanism includes a first motor 4 installed on the top of the first neutralization barrel 2, the output end of the first motor 4 passes through the first neutralization barrel 2 and is connected to the first rotating shaft 16, and the outer wall of the first rotating shaft 16 is installed with a plurality of first stirring blades 17. After the first motor 4 is started, it can drive the first rotating shaft 16 and the plurality of first stirring blades 17 to rotate synchronously, and stir the wastewater inside the first neutralization barrel 2.

[0027] As a technical optimization solution of the present invention, the second stirring mechanism includes a second motor 20 installed inside the base 1, the output end of the second motor 20 passes through the second neutralization barrel 3 and is connected to the second rotating shaft 24, and the outer wall of the second rotating shaft 24 is installed with a plurality of second stirring blades 19. After the second motor 20 is started, it can drive the second rotating shaft 24 and the plurality of second stirring blades 19 to rotate synchronously, and stir the wastewater inside the second neutralization barrel 3.

[0028] As a technical optimization solution of the present invention, the auxiliary sampling mechanism includes a third motor 5 installed on the top of the second neutralization barrel 3, the output end of the third motor 5 passes through the second neutralization barrel 3 and is connected to the third rotating shaft 18, the outer wall of the third rotating shaft 18 is provided with a plurality of limit grooves 27, and a moving frame 22 is provided inside the second neutralization barrel 3, and the moving frame 22 slides up and down inside the limit groove 27 through a plurality of limit blocks 30 provided on the inner wall. After the third motor 5 is started, it can drive the third rotating shaft 18 to rotate inside the second neutralization barrel 3, and since the moving frame 22 is slidably connected with the limit groove 27 through a plurality of limit blocks 30 provided inside, the third rotating shaft 18 can drive the moving frame 22 to rotate synchronously inside the second neutralization barrel 3 during the rotation process.

[0029] As a technical optimization solution of the present invention, two fixed plates 14 are installed on the top of the second neutralization barrel 3, and the outer walls of the two fixed plates 14 on the side close to each other are provided with sliding grooves 25, and sliders 21 are installed inside the two sliding grooves 25, and sliding rods 15 are installed at the bottom ends of the two sliders 21, and connecting ends 26 are installed at the bottom ends of the two sliding rods 15, and a circular groove 28 slidably matched with the two connecting ends 26 is opened on the top of the movable frame 22. Linear motors are preset inside the two slide grooves 25. The two linear motors can drive the two sliders 21 to move up and down inside the corresponding slide grooves 25, and drive the two slide bars 15 to slide up and down on the top of the second neutralization barrel 3. Since the bottom ends of the two slide bars 15 are slidably connected to the circular grooves 28 on the top of the mobile frame 22, the two slide bars 15 can drive the mobile frame 22 to move up and down synchronously inside the second neutralization barrel 3 during the up and down sliding process; since the two slide bars 15 are slidably connected to the mobile frame 22, when the third motor 5 drives the mobile frame 22 to rotate, the two slide bars 15 will not hinder the rotation of the mobile frame 22, ensuring that the rotation of the mobile frame 22 is not affected.

[0030] As a technical optimization solution of the present invention, two fixed seats 31 are installed at the bottom end of the mobile frame 22, and two rotating plates 32 are rotatably installed inside the two fixed seats 31 through the connecting shaft. The outer walls of both ends of the two connecting shafts are equipped with torsion springs. The inside of the two rotating plates 32 is provided with a receiving groove 34, and the bottom ends of the two rotating plates 32 are provided with a plurality of drainage holes 33 connected to the receiving groove 34. Figure 8 As shown, the two rotating plates 32 are originally in a vertical state inside the corresponding fixed seats 31. By pushing the bottom ends of the two rotating plates 32 upward, the two rotating plates 32 can be deformed with the help of the corresponding two torsion springs, so that the two rotating plates 32 can be rotated upward to a state parallel to the movable frame 22. After the restriction on the two rotating plates 32 is released, the two rotating plates 32 are elastically reset with the help of the corresponding two torsion springs, so that the two rotating plates 32 can be rotated downward and reset to the original vertical state.

[0031] As a technical optimization solution of the present invention, a plurality of connecting rods 29 are installed on the outer wall of the mobile frame 22, and a circular cleaning brush 23 is installed on one end of the plurality of connecting rods 29 away from the mobile frame 22. When the mobile frame 22 moves up and down inside the second neutralization barrel 3, it can drive the cleaning brush 23 to clean the inner wall of the second neutralization barrel 3.

[0032] As a technical optimization solution of the present invention, two rectangular grooves 35 are provided inside the mobile frame 22, and fourth motors 36 are installed inside the two rectangular grooves 35. Winding wheels 37 are installed at the output ends of the two fourth motors 36. Connecting ropes 38 are wound on the surfaces of the two winding wheels 37, and the ends of the two connecting ropes 38 away from the winding wheels 37 are connected to the rotating plates 32 close to them. After starting, the two fourth motors 36 can drive the two winding wheels 37 to rotate, and reel in and unroll the two connecting ropes 38, so that the two rotating plates 32 can be pulled and reset by means of the two connecting ropes 38, so as to achieve the effect of automatically controlling the rotation and reset of the two rotating plates 32; the fourth motor 36 is a waterproof motor, and a relevant waterproof mechanism is provided inside the rectangular groove 35 to prevent waste water from entering the rectangular groove 35.

[0033] In this embodiment, valves are preset inside the first water inlet 6 , the second water inlet 12 , the first outlet 8 , the second outlet 13 , the first pipeline 10 and the second pipeline 11 .

[0034] In the present invention, when the user uses the device, wastewater and clean water are injected into the first neutralization barrel 2 through the first water inlet 6 in a ratio of 3:1, the heating mechanism inside the first neutralization barrel 2 is controlled to heat the wastewater, and the first stirring mechanism is controlled to stir the wastewater at the same time, and benzoquinone in the wastewater is discharged from multiple steam outlets 7 together with steam, until the benzoquinone content in the manganese sulfate wastewater is qualified, the first stirring mechanism is stopped, and the wastewater is allowed to stand for 6 hours to precipitate the manganese ore impurities in the wastewater that have completed the reaction, and the manganese sulfate wastewater above the precipitate in the first neutralization barrel 2 is pumped out by a water pump and discharged into the second neutralization barrel 3, and then the precipitate is discharged into the filter press through the first discharge port 8, and the first filter press is used for coarse pressing, and the manganese sulfate wastewater after the filter press enters the second neutralization barrel 3 through the second water inlet 12.

[0035] The wastewater entering the second neutralization barrel 3 is aerated for 60 minutes, and is added with ammonia water, sodium thimerosal, industrial activated carbon and polyacrylamide. It is stirred by means of a second stirring mechanism, and the industrial activated carbon and polyacrylamide adsorb the heavy metal substances in the wastewater. The second stirring mechanism is stopped, and the wastewater in the second neutralization barrel 3 is allowed to stand for 5 hours before being discharged through the second discharge port 13 to the filter press for the second filter press, thereby completing the first two steps of purification of the wastewater.

[0036] When the above-mentioned wastewater is located in the second neutralization barrel 3 for relevant purification treatment, the staff needs to sample and test the wastewater on time to ensure that the relevant indicators in the wastewater are qualified. In order to facilitate the staff to quickly sample the wastewater, the two fourth motors 36 can be controlled to start together, drive the two winding wheels 37 to rotate, and wind up the two connecting ropes 38 together, and pull the two rotating plates 32 upward to rotate to a state parallel to the moving frame 22, and then control the two sliders 21 to slide downward together in the corresponding slide grooves 25, drive the two slide bars 15 to move downward together in the second neutralization barrel 3, and push the moving frame 22 to move downward into the wastewater. At this time, the wastewater will enter the storage grooves 34 inside the two rotating plates 32. After the wastewater enters the storage grooves 34, as The two sliders 21 move upward and reset inside the corresponding slide grooves 25, driving the movable frame 22 to move upward until it abuts against the top surface of the second neutralization barrel 3. At this time, one of the rotating plates 32 is located directly below the second water inlet 12. Since the multiple drainage holes 33 opened on the outer walls of the two rotating plates 32 have a small diameter, the multiple drainage holes 33 at the bottom of the rotating plate 32 moved above the wastewater cannot quickly discharge the collected wastewater. The staff can insert the bottom end of the sampling test tube into one of the receiving grooves 34 through the second water inlet 12 to quickly sample the wastewater collected in the receiving groove 34, thereby avoiding the problem that the wastewater level inside the second neutralization barrel 3 is low and it is inconvenient to use a test tube for manual sampling, thereby improving the staff's sampling efficiency of wastewater and facilitating rapid detection of wastewater.

[0037] In the process of mixing and stirring the wastewater and other additives by the second stirring mechanism, more foam will inevitably be generated on the water surface. In order to avoid the problem that the additives in the foam cannot be mixed in the wastewater, resulting in low reaction efficiency with the wastewater, the above steps can be repeated, so that the movable frame 22 is immersed in the wastewater again until the two receiving grooves 34 collect part of the wastewater, and then the movable frame 22 is controlled to move upward to the top of the wastewater. As the third motor 5 drives the movable frame 22 to rotate inside the second neutralization barrel 3, the multiple drainage holes 33 located at the bottom of the two rotating plates 32 can sprinkle the wastewater collected in the receiving groove 34 downward, defoam the foam on the wastewater surface, improve the efficiency of the mixing reaction between the additive and the wastewater, and facilitate the efficiency of purifying and removing harmful substances in the wastewater.

[0038] After the waste water in the second neutralization barrel 3 is discharged, in order to facilitate the subsequent use of the second neutralization barrel 3, the second neutralization barrel 3 needs to be cleaned to avoid the accumulation of some impurities in the second neutralization barrel 3. At this time, the two sliders 21 can be controlled to move up and down in the corresponding slide grooves 25. With the help of the up and down movement of the two slide bars 15, the mobile frame 22 is driven to move up and down synchronously in the second neutralization barrel 3, so that the cleaning brush 23 arranged on the outer wall of the mobile frame 22 can automatically clean the impurities attached to the inner wall of the second neutralization barrel 3 during the up and down movement. The third motor 5 can also cooperate with the mobile frame 22 to rotate, so that the cleaning brush 23 can rotate and clean the inner wall of the second neutralization barrel 3, thereby improving the efficiency and quality of cleaning impurities on the inner wall of the second neutralization barrel 3; If the impurities attached to the inner wall of the second neutralization barrel 3 are relatively hard and cannot be quickly cleaned and removed by using only the cleaning brush 23, the two fourth motors 36 can be controlled to be powered off at this time, so that the two fourth motors 36 no longer control the two winding wheels 37, and with the help of the elastic reset of the two torsion springs, the two rotating plates 32 located at the bottom of the movable frame 22 are driven to rotate downward and reset to a vertical state. After the two rotating plates 32 are rotated and reset, the outer walls of the sides away from each other are abutted against the inner wall of the second neutralization barrel 3, and the movable frame 22 is driven by the two sliding rods 15 to move to the adjustment position inside the second neutralization barrel 3, so that the two rotating plates 32 move to a position close to the relatively hard impurities. At this time, as the movable frame 22 continues to rotate, the two rotating plates 32 are driven to rotate together inside the second neutralization barrel 3, so that the two larger rotating plates 32 can scrape and clean the relatively hard impurities attached to the inner wall of the second neutralization barrel 3, so that the second neutralization barrel 3 is quickly put into use in the subsequent wastewater purification process, thereby indirectly improving the efficiency of wastewater treatment.

[0039] After the second neutralization barrel 3 has been used for a period of time, the two fourth motors 36 can be controlled to drive the two winding wheels 37 to rotate, drive the two connecting ropes 38 to reel up, and pull the two rotating plates 32 to rotate upward to a state parallel to the moving frame 22. At this time, the two fourth motors 36 are controlled to be powered off, so that the two winding wheels 37 are no longer restricted, and the two rotating plates 32 are not limited by the pulling of the connecting ropes 38. With the help of the corresponding two torsion springs, the two rotating plates 32 will rotate downward and reset at a faster speed. At this time, the two rotating plates 32 will knock on the inner wall of the second neutralization barrel 3 while rotating downward and resetting. The above operation is repeated many times, and the third motor 5 is controlled to drive the moving frame 22 and the two rotating plates 32 to adjust the position, so that the two rotating plates 32 can knock on different positions inside the second neutralization barrel 3 for detection. The staff can use relevant instruments or personal auditory experience to judge whether there is cracks or other damage inside the second neutralization barrel 3, so as to achieve the effect of automatic knocking detection of the second neutralization barrel 3, which is convenient for the inspection and maintenance of the second neutralization barrel 3.

[0040] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-stage treatment method for manganese sulfate wastewater containing benzoquinone, characterized in that: The processing method comprises the following steps: Step 1: Leaching and removing benzoquinone, the manganese sulfate wastewater and clean water are put into the first neutralization barrel (2) at a ratio of 3:1, and then the mixed manganese sulfate wastewater is heated and stirred. After the manganese sulfate wastewater is heated to 90°C, the benzoquinone in the manganese sulfate wastewater evaporates with the steam. Then, the manganese sulfate wastewater is closed and stirred and left to stand for 6 hours, and the manganese sulfate wastewater is subjected to the first filter press; Step 2: Neutralization to remove iron and nickel. The manganese sulfate wastewater after the first filter press in step 1 is introduced into the second neutralization barrel (3) for aeration. Then, ammonia water, sodium thiamethoxam, industrial activated carbon and polyacrylamide are added into the second neutralization barrel (3) in sequence. After mixing and stirring, the mixture is allowed to stand for 5 hours for the second filter press. Step 3: Sulfidation to remove zinc and organic matter, the manganese sulfate wastewater after the second filter press in step 2 is introduced into a sulfidation barrel, sulfuric acid, sodium sulfide, and polyacrylamide are added to the sulfidation barrel in sequence, mixed and stirred, and then precipitated for 5 hours for the third filter press; Step 4: Standing, in step 3, hydrogen peroxide is added to the manganese sulfate wastewater after the third filter press and the wastewater is allowed to stand for 24 hours. After the standing, the fourth fine filtration is performed to complete the purification of the manganese sulfate wastewater.

2. A multi-stage treatment device for manganese sulfate wastewater containing benzoquinone, which is applied to the treatment method of claim 1, and comprises a first neutralization barrel (2), a second neutralization barrel (3) and a base (1), characterized in that: The first neutralization barrel (2) and the second neutralization barrel (3) are both arranged on the top of the base (1); the top and bottom of the first neutralization barrel (2) are respectively provided with a first water inlet (6) and a first outlet (8); the top of the first neutralization barrel (2) is also provided with a plurality of steam outlets (7); a first stirring mechanism for stirring manganese sulfate wastewater is arranged inside the first neutralization barrel (2); a second water inlet (12) and a second outlet (13) are respectively arranged on the top and bottom of the second neutralization barrel (3); an auxiliary sampling mechanism for facilitating sampling of manganese sulfate wastewater and a second stirring mechanism are respectively arranged inside the second neutralization barrel (3).

3. A multi-stage treatment device for manganese sulfate wastewater containing benzoquinone according to claim 2, characterized in that: A mounting plate (9) is installed between the first neutralization barrel (2) and the second neutralization barrel (3); a water pump is installed on the top of the mounting plate (9); a first pipe (10) and a second pipe (11) are installed at the input end and the output end of the water pump, respectively; and ends of the first pipe (10) and the second pipe (11) away from the water pump extend to the inside of the first neutralization barrel (2) and the second neutralization barrel (3), respectively.

4. A multi-stage treatment device for manganese sulfate wastewater containing benzoquinone according to claim 3, characterized in that: The first stirring mechanism comprises a first motor (4) mounted on the top of the first neutralization barrel (2); the output end of the first motor (4) passes through the first neutralization barrel (2) and is connected to a first rotating shaft (16); and a plurality of first stirring blades (17) are mounted on the outer wall of the first rotating shaft (16).

5. A multi-stage treatment device for manganese sulfate wastewater containing benzoquinone according to claim 4, characterized in that: The second stirring mechanism comprises a second motor (20) installed inside the base (1); an output end of the second motor (20) passes through the second neutralization barrel (3) and is connected to a second rotating shaft (24); and a plurality of second stirring blades (19) are installed on the outer wall of the second rotating shaft (24).

6. A multi-stage treatment device for manganese sulfate wastewater containing benzoquinone according to claim 5, characterized in that: The auxiliary sampling mechanism comprises a third motor (5) mounted on the top of the second neutralization barrel (3); the output end of the third motor (5) passes through the second neutralization barrel (3) and is connected to a third rotating shaft (18); a plurality of limiting grooves (27) are formed on the outer wall of the third rotating shaft (18); a movable frame (22) is arranged inside the second neutralization barrel (3); the movable frame (22) slides up and down inside the limiting grooves (27) via a plurality of limiting blocks (30) arranged on the inner wall.

7. A multi-stage treatment device for manganese sulfate wastewater containing benzoquinone according to claim 6, characterized in that: Two fixing plates (14) are installed on the top of the second neutralization barrel (3), and the outer walls of the two fixing plates (14) on the sides close to each other are each provided with a slide groove (25), and the insides of the two slide grooves (25) are each provided with a slider (21), and the bottom ends of the two sliders (21) are each provided with a slide rod (15), and the bottom ends of the two slide rods (15) are each provided with a connecting end (26), and the top of the movable frame (22) is provided with a circular groove (28) that slidably cooperates with the two connecting ends (26).

8. A multi-stage treatment device for manganese sulfate wastewater containing benzoquinone according to claim 7, characterized in that: Two fixed seats (31) are installed at the bottom end of the movable frame (22), and two rotating plates (32) are rotatably installed inside the two fixed seats (31) via connecting shafts. The outer walls at both ends of the two connecting shafts are sleeved with torsion springs. The insides of the two rotating plates (32) are provided with receiving grooves (34), and the bottom ends of the two rotating plates (32) are provided with a plurality of drainage holes (33) connected to the receiving grooves (34).

9. A multi-stage treatment device for manganese sulfate wastewater containing benzoquinone according to claim 8, characterized in that: A plurality of connecting rods (29) are installed on the outer wall of the movable frame (22), and a circular cleaning brush (23) is installed together at one end of the plurality of connecting rods (29) away from the movable frame (22).

10. A multi-stage treatment device for manganese sulfate wastewater containing benzoquinone according to claim 9, characterized in that: Two rectangular grooves (35) are provided inside the movable frame (22), and a fourth motor (36) is installed inside the two rectangular grooves (35). Winding wheels (37) are installed at the output ends of the two fourth motors (36), and connecting ropes (38) are wound on the surfaces of the two winding wheels (37). The ends of the two connecting ropes (38) away from the winding wheels (37) are connected to the rotating plate (32) close to the winding wheels.

Images