Multi-ion mixed gas catalytic oxidation treatment device for printing and dyeing wastewater

Abstract

The utility model relates to the technical field of printing and dyeing wastewater treatment, and particularly discloses a multi-ion mixed gas catalytic oxidation treatment device for printing and dyeing wastewater, which comprises a shell, an air floatation tank and a gas production unit, the gas production unit is connected with a gas storage tank, the gas storage tank is connected with a sewage reaction pipe, and the sewage reaction pipe is inserted into the air floatation tank. The upper sealing frame, the lower sealing frame and the contraction and extension assembly are arranged in the sealing device, the contraction and extension assembly is used for adjusting the distance between the upper sealing frame and the lower sealing frame, the upper sealing frame and the lower sealing frame have at least two working states including the extension state and the contraction state, and the upper sealing frame and the lower sealing frame are in the contraction state. The upper sealing frame and the lower sealing frame are pressed at the upper end and the lower end of the sewage reaction pipe respectively, at the moment, only a mixing area of the sewage reaction pipe makes direct contact with sewage, other parts of the sewage reaction pipe are separated from the sewage, the parts, except the mixing area, of the sewage reaction pipe can be prevented from being corroded by impurities in the sewage, and the service life is longer.

Description

Technical Field

[0001] The utility model belongs to the technical field of printing and dyeing wastewater treatment, and particularly relates to a multi-element mixed gas catalytic oxidation treatment device for printing and dyeing wastewater. Background Art

[0002] At present, when treating printing and dyeing wastewater, a variety of strong oxidizing substances are produced by chip low voltage cracking during treatment, including hydroxyl radicals (·OH), ozone (O3), hydroxide ions (OH - ), single oxygen (O - ), hydrogen ions (H + ), oxygen (O2) and a gas mixture of multiple elements in atomic and ionic states. The above gases are introduced into the flotation tank through the reaction tube and mixed with the sewage inside the flotation tank. During mixing, the gases catalyze the oxidation of the components in the sewage, remove the chromophores in the sewage, and reduce the COD index in the sewage.

[0003] The reaction tubes that lead into the flotation tank are topped with vents for discharging gas. The area that mixes with the sewage is primarily the mixing zone with the vents. Only the mixing zone needs to be in contact with the sewage. However, currently, the reaction tubes are typically located directly at the bottom of the flotation tank. All portions of the reaction tubes, except the mixing zone, are in contact with the sewage. Impurities in the sewage adhere to these areas and the mixing zone, significantly accelerating the corrosion rate of the reaction tubes. Furthermore, the reaction tubes are located at the bottom of the flotation tank, with a small gap between them and the inner wall of the flotation tank. This makes it difficult to clean the tube wall near the inner wall of the flotation tank. Therefore, this application proposes a multi-ion mixed gas catalytic oxidation treatment device for printing and dyeing wastewater. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-element mixed gas catalytic oxidation treatment device for printing and dyeing wastewater to solve the problems raised by the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a multi-ion mixed gas catalytic oxidation treatment device for printing and dyeing wastewater, comprising a shell, a flotation tank, and a gas production unit, wherein the gas production unit is connected to a gas storage box, which is connected to a sewage reaction tube, and the sewage reaction tube is inserted into the flotation tank;

[0006] The top of the sewage reaction tube is provided with an exhaust hole, and the area in the sewage reaction tube where the exhaust hole is provided is a mixing zone;

[0007] An upper sealing frame and a lower sealing frame are provided in the flotation tank, and a contraction and extension assembly is provided between the upper sealing frame and the lower sealing frame. The contraction and extension assembly allows the upper sealing frame and the lower sealing frame to have at least two working states, including an extended state and a contracted state. When the upper sealing frame and the lower sealing frame are in the contracted state, the upper sealing frame and the lower sealing frame are respectively pressed against the upper and lower ends of the sewage reaction tube. At this time, the area of the sewage reaction tube except the mixing zone is blocked by the upper sealing frame and the lower sealing frame.

[0008] The upper sealing frame and the lower sealing frame are both equipped with pipeline cleaning nozzles, the pipeline cleaning nozzles are connected to the nozzles, the pipeline cleaning nozzles are connected to the water tank, and the pipeline cleaning nozzles are connected to a moving component for driving them to move in a direction parallel to the inner wall of the flotation tank.

[0009] Preferably, the sewage reaction pipe is located in a partially serpentine distribution within the flotation tank.

[0010] Preferably, the retraction and extension assembly includes a hydraulic cylinder having two output ends, and the two output ends of the hydraulic cylinder are respectively connected to two intermediate seats, the intermediate seats are connected to the lower push-pull plate and the upper push-pull plate, the lower push-pull plate is connected to the lower sealing frame, and the upper push-pull plate is connected to the upper sealing frame, the hydraulic cylinder is arranged on the I-plate, and the I-plate cooperates with the through hole in the lower sealing frame.

[0011] Preferably, an upper card frame is provided at the lower end of the upper sealing frame, and the upper card groove in the upper card frame cooperates with the sewage reaction tube; a lower card frame is provided at the upper end of the lower sealing frame, and the lower card groove in the lower card frame cooperates with the sewage reaction tube, and a drainage groove is provided in the lower card frame.

[0012] Preferably, when the upper sealing frame and the lower sealing frame are in an extended state, there is a gap between the upper sealing frame and the lower sealing frame and the sewage reaction tube.

[0013] Preferably, the two groups of pipeline cleaning nozzles in the upper sealing frame and the lower sealing frame are symmetrically distributed up and down, there are four pipeline cleaning nozzles in total, and the nozzles are arranged at an angle.

[0014] Preferably, the moving assembly includes a drive motor, the output end of the drive motor is connected to a threaded rod, the threaded rod is connected to a slider through a thread, the slider is connected to the track, there is a space between the two pipe cleaning nozzles in the upper sealing frame and the lower sealing frame, a bracket is provided in the space, one end of the bracket is connected to the sewage reaction tube, and the other end is connected to the inner wall of the flotation tank.

[0015] Preferably, it also includes a pipe top spray mechanism.

[0016] Preferably, the flotation tank is connected to a secondary mixing pipe, the secondary mixing pipe is communicated with the gas storage box through an air inlet pipe, and a plurality of mixers are provided in the secondary mixing pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The utility model is internally provided with an upper sealing frame, a lower sealing frame, and a contraction and extension component. The contraction and extension component is used to adjust the distance between the upper sealing frame and the lower sealing frame, so that the upper sealing frame and the lower sealing frame have at least two working states, including an extended state and a contracted state. When the upper sealing frame and the lower sealing frame are in the contracted state, the upper sealing frame and the lower sealing frame are respectively pressed on the upper and lower ends of the sewage reaction tube. At this time, only the mixing zone of the sewage reaction tube is in direct contact with the sewage, and the other parts are separated from the sewage, so that the parts of the sewage reaction tube except the mixing zone can avoid corrosion from impurities in the sewage and have a longer service life.

[0019] 2. When the upper sealing frame and the lower sealing frame of the utility model are in the extended state, they are respectively located on the upper and lower sides of the sewage reaction pipe. The four pipe cleaning nozzles located on the upper and lower sealing frames can flush the sewage reaction pipe from the upper and lower sides, clean the outer wall of the sewage reaction pipe including the mixing area, remove the stains adhering thereto, keep the sewage reaction pipe clean, and prevent the stains from corroding the sewage reaction pipe.

[0020] 3. The gas production unit of the present invention produces a multi-element atomic and ionic gas mixture through low-voltage cracking of the chip. The above-mentioned gas mixture enters the gas storage box and enters the flotation tank through the sewage reaction tube, and is mixed with the sewage in the flotation tank for the first time. After that, the sewage enters the secondary mixing pipe. The gas in the gas storage box is mixed with the sewage for the second time in the secondary mixing pipe through the air inlet pipe, and the sewage is treated for the second time. After the two mixing treatments, most of the chromophores in the sewage are reacted, and the COD value in the sewage is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of the multi-element mixed gas catalytic oxidation treatment device for printing and dyeing wastewater in the utility model.

[0022] Figure 2 This is a structural schematic diagram of the multi-element mixed gas catalytic oxidation treatment device for printing and dyeing wastewater in the utility model with the top cover removed.

[0023] Figure 3 For this utility model Figure 2 Schematic diagram of the structure after removing the upper sealing frame, lower sealing frame, and contraction and extension components.

[0024] Figure 4 This is a structural diagram of the upper sealing frame and the lower sealing frame in the utility model.

[0025] Figure 5 This is one of the internal structure diagrams of the multi-element mixed gas catalytic oxidation treatment device for printing and dyeing wastewater in the utility model.

[0026] Figure 6 This is a structural diagram of the sewage reaction tube, upper sealing frame and lower sealing frame in the utility model.

[0027] Figure 7 This is the second schematic diagram of the internal structure of the multi-element mixed gas catalytic oxidation treatment device for printing and dyeing wastewater in the present invention.

[0028] Figure 8 This is a schematic diagram of the structure of the pipe cleaning nozzle and nozzle in the utility model.

[0029] In the figure: 1. Shell; 2. Flotation tank; 3. Gas production unit; 4. Gas storage box; 5. Sewage reaction tube; 501. Exhaust hole; 7. Upper sealing frame; 701. Upper clamping frame; 8. Lower sealing frame; 801. Lower clamping frame; 802. Drain trough; 9. Retraction and extension component; 901. Hydraulic cylinder; 902. Middle seat; 903. Lower push-pull plate; 904. Upper push-pull plate; 905. I-plate; 10. Pipe cleaning nozzle; 11. Nozzle; 12. Water tank; 13. Moving component; 1301. Drive motor; 1302. Threaded rod; 1303. Track; 14. Secondary mixing pipe; 15. Air inlet pipe; 16. Spraying mechanism at the top of the pipe. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 creative efforts are within the scope of protection of the present invention.

[0031] Reference Figures 1-8 A multi-ion mixed gas catalytic oxidation treatment device for printing and dyeing wastewater includes a shell 1, an air flotation tank 2, and a gas production unit 3. The top of the air flotation tank 2 is provided with a top cover. The gas production unit 3 is connected to a gas storage box 4. The gas production unit 3 generates a variety of strong oxidizing substances through chip low voltage cracking, including hydroxyl radicals (·OH), ozone (O3), hydroxide ions (OH - ), single oxygen (O - ), hydrogen ions (H + ), oxygen (O2) and a gas mixture of multiple elements in atomic and ionic states, the above gas mixture enters the gas storage box 4, the gas storage box 4 is connected to the sewage reaction pipe 5, the sewage reaction pipe 5 is inserted into the flotation tank 2, and the sewage reaction pipe 5 is located in a serpentine distribution in the flotation tank 2.

[0032] An exhaust hole 501 is provided at the top of the sewage reaction tube 5 , and the area in the sewage reaction tube 5 where the exhaust hole 501 is provided is a mixing area.

[0033] Furthermore, an upper sealing frame 7 and a lower sealing frame 8 are provided in the flotation tank 2, and a contraction and extension component 9 is provided between the upper sealing frame 7 and the lower sealing frame 8. The contraction and extension component 9 is used to adjust the distance between the upper sealing frame 7 and the lower sealing frame 8, so that the upper sealing frame 7 and the lower sealing frame 8 have at least two working states, including an extended state and a contracted state. When the upper sealing frame 7 and the lower sealing frame 8 are in the contracted state, the upper sealing frame 7 and the lower sealing frame 8 are respectively pressed on the upper and lower ends of the sewage reaction tube 5. At this time, the area of the sewage reaction tube 5 except the mixing zone is blocked by the upper sealing frame 7 and the lower sealing frame 8; that is, the sewage can only contact the mixing zone, and the gas in the gas storage box 4 is discharged from the exhaust hole 501, mixed with the sewage in the flotation tank 2, and reacted with the chromophores and organic matter in the sewage, thereby reducing the content of the above two in the sewage.

[0034] Furthermore, when the upper sealing frame 7 and the lower sealing frame 8 are in the extended state, there is a gap between the upper sealing frame 7 and the lower sealing frame 8 and the sewage reaction tube 5. The gap allows the pipeline cleaning nozzle 10 to move, and the clean water sprayed out can clean the outer wall of the sewage reaction tube 5.

[0035] Specifically, the contraction and extension component 9 includes a hydraulic cylinder 901, which has two output ends, and the two output ends of the hydraulic cylinder 901 are respectively connected to two intermediate seats 902, the intermediate seat 902 is connected to the lower push-pull plate 903 and the upper push-pull plate 904, the lower push-pull plate 903 is connected to the lower sealing frame 8, and the upper push-pull plate 904 is connected to the upper sealing frame 7, the hydraulic cylinder 901 is arranged on the I-plate 905, and the I-plate 905 cooperates with the through hole in the lower sealing frame 8. It should be noted that the lower end of the upper sealing frame 7 is provided with an upper card frame 701, and the upper card groove in the upper card frame 701 cooperates with the sewage reaction pipe 5, and the upper end of the lower sealing frame 8 is provided with a lower card frame 801, and the lower card groove in the lower card frame 801 cooperates with the sewage reaction pipe 5, and the lower card frame 801 is provided with a drainage groove 802. When the pipeline cleaning nozzle 10 sprays water, part of the water enters the lower card frame 801, and this part of the water is eventually discharged from the drainage groove 802;

[0036] Both the upper sealing frame 7 and the lower sealing frame 8 are equipped with pipe cleaning nozzles 10, and the two groups of pipe cleaning nozzles 10 in the upper sealing frame 7 and the lower sealing frame 8 are symmetrically distributed up and down. There are four pipe cleaning nozzles 10 in total, one in each of the four directions of up and down, left and right. The pipe cleaning nozzles 10 are connected to the nozzles 11, and the nozzles 11 are tilted. The pipe cleaning nozzles 10 are connected to the water tank 12. The pipe cleaning nozzles 10 are connected to a moving assembly 13 for driving them to move in a direction parallel to the inner wall of the flotation tank 2; the moving assembly 13 can drive the pipe cleaning nozzles 10 to move, and the clean water sprayed by the pipe cleaning nozzles 10 flushes the outer wall of the sewage reaction tube 5 from the upper and lower directions to complete the cleaning work of the sewage reaction tube 5.

[0037] The moving assembly 13 includes a drive motor 1301, the output end of the drive motor 1301 is connected to a threaded rod 1302, the threaded rod 1302 is connected to a slider via a thread, and the slider is connected to a track 1303. There is a space between the two pipe cleaning nozzles 10 in the upper sealing frame 7 and the lower sealing frame 8. A bracket is provided in the space, one end of the bracket is connected to the sewage reaction tube 5, and the other end is connected to the inner wall of the flotation tank 2. The bracket is used to fix the relative position between the sewage reaction tube 5 and the flotation tank 2.

[0038] The pipe also includes a top spray mechanism 16, which can spray clean water to flush the upper end surface of the sewage reaction pipe 5. It is mainly used when the sewage reaction pipe 5 does not need to be cleaned as a whole, and only the mixing area in the sewage reaction pipe 5 needs to be cleaned. Specifically, the outlet pipe of the top spray mechanism 16 can be adjusted in angle as needed to flush the upper end surface of the sewage reaction pipe 5.

[0039] The flotation tank 2 is connected to the secondary mixing pipe 14, and the sewage reaction pipe 5 serves as the primary mixing pipe. The secondary mixing pipe 14 is connected to the gas storage box 4 through the air inlet pipe 15. Multiple mixers are provided in the secondary mixing pipe 14. In this way, the gas first enters the flotation tank 2 to react with the sewage, and then is mixed again in the secondary mixing pipe 14 and reacts again. The two mixings can greatly improve the sewage treatment effect.

[0040] The principle of gas production unit 3 producing gas to treat printing and dyeing wastewater:

[0041] The principle of removing color from printing and dyeing wastewater:

[0042] The color in printing and dyeing wastewater primarily comes from dye molecules. These dyes' color is primarily due to the presence of unsaturated atomic groups within the dye molecules, known as chromophores. These chromophores have unsaturated bonds, which mixed gases react with, breaking them apart and ultimately producing smaller molecules such as organic acids and aldehydes. This decolorizes the dye, depleting it of its color-bearing properties.

[0043] The principle of reducing COD index in printing and dyeing wastewater:

[0044] COD is a measure of the organic matter content in wastewater. Mixed gases can oxidize organic matter in wastewater, breaking it down into carbon dioxide, water, and other harmless substances, thereby reducing COD. The oxidation of organic matter by mixed gases produces more hydroxyl radicals (·OH). Hydroxyl radicals have a stronger oxidizing ability and can accelerate the oxidative decomposition of organic matter.

[0045] Hydroxyl radicals react rapidly with organic matter, non-selectively oxidizing it and breaking it down into small molecules. Hydroxyl radicals are highly reactive, fast, and non-selective, and can excite inactive hydrogen atoms on the rings of organic matter, generating organic molecular free radicals through dehydrogenation reactions.

[0046] Moreover, hydroxyl radicals can also replace the sulfonic acid group and nitro group on the aromatic ring by replacing the carboxyl group, thereby destroying the stability of organic matter and generating unstable carboxyl substituted intermediates until they are completely reacted into inorganic substances.

[0047] Working principle:

[0048] The gas production unit 3 produces a variety of strong oxidizing substances through chip low voltage cracking, including hydroxyl radicals (·OH), ozone (O3), hydroxide ions (OH - ), single oxygen (O - ), hydrogen ions (H + ), oxygen (O2) and a gas mixture in atomic and ionic states of multiple elements. The gas mixture enters the gas storage box 4 and enters the flotation tank 2 through the sewage reaction tube 5, and is mixed with the sewage in the flotation tank 2 for the first time. The sewage then enters the secondary mixing pipe 14. The gas in the gas storage box 4 is mixed with the sewage for the second time in the secondary mixing pipe 14 through the air inlet pipe 15, and the sewage is treated for the second time.

[0049] When the upper sealing frame 7 and the lower sealing frame 8 are in the retracted state, only the mixed area of the sewage reaction tube 5 leaks. At this time, the mixed area can be cleaned by the spraying mechanism 16 at the top of the pipe. After long-term use, part of the sewage will flow through the gap between the upper sealing frame 7 and the lower sealing frame 8 to other surfaces of the sewage reaction tube 5. In order to clean it, the contraction and extension component 9 is started to unfold the upper sealing frame 7 and the lower sealing frame 8. At this time, the moving component 13 and the pipeline cleaning nozzle 10 are started to flush the sewage reaction tube 5 back and forth from the upper and lower angles to remove stains adhering to the outer surface of the sewage reaction tube 5 and prevent sewage from adhering to the outer wall of the sewage reaction tube 5 and corroding the sewage reaction tube 5.

[0050] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-element mixed gas catalytic oxidation treatment device for printing and dyeing wastewater, comprising a housing (1), an air flotation tank (2), and a gas production unit (3), characterized in that: The gas production unit (3) is connected to the gas storage box (4), the gas storage box (4) is connected to the sewage reaction tube (5), and the sewage reaction tube (5) is inserted into the flotation tank (2); The top of the sewage reaction tube (5) is provided with an exhaust hole (501), and the area in the sewage reaction tube (5) where the exhaust hole (501) is provided is a mixing area; An upper sealing frame (7) and a lower sealing frame (8) are provided in the flotation tank (2); a contraction and extension assembly (9) is provided between the upper sealing frame (7) and the lower sealing frame (8); the contraction and extension assembly (9) allows the upper sealing frame (7) and the lower sealing frame (8) to have at least two working states, including an extension state and a contraction state; when the upper sealing frame (7) and the lower sealing frame (8) are in the contraction state, the upper sealing frame (7) and the lower sealing frame (8) are pressed against the upper and lower ends of the sewage reaction tube (5) respectively; at this time, the area of the sewage reaction tube (5) except the mixing area is blocked by the upper sealing frame (7) and the lower sealing frame (8); A pipeline cleaning nozzle (10) is installed on both the upper sealing frame (7) and the lower sealing frame (8), the pipeline cleaning nozzle (10) is connected to a nozzle (11), the pipeline cleaning nozzle (10) is connected to a water tank (12), and the pipeline cleaning nozzle (10) is connected to a moving component (13) for driving it to move in a direction parallel to the inner wall of the flotation tank (2).

2. The multi-ion mixed gas catalytic oxidation treatment device for printing and dyeing wastewater according to claim 1, characterized in that: The sewage reaction pipe (5) is located in a partially serpentine distribution within the flotation tank (2).

3. The multi-element mixed gas catalytic oxidation treatment device for printing and dyeing wastewater according to claim 1, characterized in that: The contraction and extension assembly (9) includes a hydraulic cylinder (901), the hydraulic cylinder (901) having two output ends, and the two output ends of the hydraulic cylinder (901) are respectively connected to two intermediate seats (902), the intermediate seats (902) are connected to the lower push-pull plate (903) and the upper push-pull plate (904), the lower push-pull plate (903) is connected to the lower sealing frame (8), and the upper push-pull plate (904) is connected to the upper sealing frame (7), the hydraulic cylinder (901) is arranged on the I-shaped plate (905), and the I-shaped plate (905) cooperates with the through hole in the lower sealing frame (8).

4. The multi-ion mixed gas catalytic oxidation treatment device for printing and dyeing wastewater according to claim 3, characterized in that: An upper clamping frame (701) is provided at the lower end of the upper sealing frame (7), and an upper clamping groove in the upper clamping frame (701) cooperates with the sewage reaction tube (5). A lower clamping frame (801) is provided at the upper end of the lower sealing frame (8), and a lower clamping groove in the lower clamping frame (801) cooperates with the sewage reaction tube (5), and a drainage groove (802) is provided in the lower clamping frame (801).

5. The multi-element mixed gas catalytic oxidation treatment device for printing and dyeing wastewater according to claim 1, characterized in that: The upper sealing frame (7) and the lower sealing frame (8) are in an extended state, and both the upper sealing frame (7) and the lower sealing frame (8) are spaced apart from the sewage reaction tube (5).

6. The multi-element mixed gas catalytic oxidation treatment device for printing and dyeing wastewater according to claim 1, characterized in that: The two groups of pipeline cleaning nozzles (10) in the upper sealing frame (7) and the lower sealing frame (8) are symmetrically distributed up and down, there are four pipeline cleaning nozzles (10) in total, and the nozzles (11) are arranged at an angle.

7. The device for treating printing and dyeing wastewater by catalytic oxidation using a multi-component ion mixed gas according to claim 1, characterized in that: The moving assembly (13) includes a driving motor (1301), the output end of the driving motor (1301) is connected to a threaded rod (1302), the threaded rod (1302) is connected to a slider via a thread, and the slider is connected to a track (1303). There is a space between the two pipeline cleaning nozzles (10) in the upper sealing frame (7) and the lower sealing frame (8), and a bracket is provided in the space, one end of the bracket is connected to the sewage reaction tube (5), and the other end is connected to the inner wall of the flotation tank (2).

8. The multi-element mixed gas catalytic oxidation treatment device for printing and dyeing wastewater according to claim 1, characterized in that: It also includes a pipeline top spraying mechanism (16).

9. The device for treating printing and dyeing wastewater by catalytic oxidation using a multi-component ion mixed gas according to claim 1, characterized in that: The flotation tank (2) is connected to a secondary mixing pipe (14), which is in communication with the gas storage box (4) via an air inlet pipe (15), and a plurality of mixers are provided in the secondary mixing pipe (14).

Images