Device and method for treating degradation-resistant organic wastewater

Abstract

The invention relates to the field of organic wastewater treatment, in particular to a refractory organic wastewater treatment device and method and a device shell, the bottom of the device shell is fixedly connected with a supporting seat, the inner wall of the device shell is fixedly connected with a partition plate, and the interior of the device shell is divided into a pretreatment pool and an enhanced decomposition pool by the partition plate; the outer surface of the partition plate is fixedly connected with a liquid pumping machine used for pumping wastewater in the pretreatment pool into the enhanced decomposition pool, and the outer surface of the device shell is further fixedly connected with a water outlet, a pretreatment mechanism arranged in the pretreatment pool and a decomposition unit arranged in the enhanced decomposition pool; large-particle impurities and flocculent impurities in wastewater are removed in advance through the pretreatment mechanism, aromatic rings and halogenated bonds of refractory organic matters can be broken by the decomposition unit, macromolecules are converted into micromolecules, meanwhile, the activity of titanium dioxide can be enhanced by the microwave device, and residual refractory pollutants are further degraded; and finally, the treated sewage flows out through a water outlet.

Description

Technical Field

[0001] This invention relates to the field of organic wastewater treatment technology, specifically to a device and method for treating recalcitrant organic wastewater. Background Technology

[0002] With the iterative upgrading of industrial technology and the rapid development of industries such as fine chemicals, pharmaceuticals, dyes, and electronics, the scenarios for the generation of recalcitrant organic pollutants continue to expand, and emissions are showing a year-on-year upward trend. These pollutants are characterized by stable chemical structures, strong biological toxicity, and long environmental retention periods. They encompass multiple categories, including aromatic compounds, halogenated organic compounds, heterocyclic compounds, antibiotics, and synthetic polymer intermediates. They are widely present in chemical production wastewater, pharmaceutical tailwater, dyeing and printing wastewater, and hazardous waste leachate, posing a dual threat to the ecological environment and human health. Summary of the Invention

[0003] The present invention provides a device and method for treating recalcitrant organic wastewater to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a device for treating recalcitrant organic wastewater, comprising: a device shell, a support base fixedly connected to the bottom of the device shell, a partition plate fixedly connected to the inner wall of the device shell, the partition plate dividing the interior of the device shell into a pretreatment tank and an enhanced decomposition tank, a pump for drawing wastewater from the pretreatment tank into the enhanced decomposition tank fixedly connected to the outer surface of the partition plate, and an outlet fixedly connected to the outer surface of the device shell, and further comprising:

[0005] A pretreatment mechanism installed in a pretreatment tank and a decomposition unit installed in an enhanced decomposition tank;

[0006] The decomposition unit includes an electrolysis plate, an electrode (specifically a titanium-based iridium dioxide electrode) is fixedly connected to the outer surface of the electrolysis plate, a first support column is fixedly connected to the top of the electrolysis plate, a top plate is fixedly connected to the top of the first support column, a second support column is fixedly connected to the outer surface of the top plate, a microwave device is fixedly connected to the bottom of the second support column, a spray device is fixedly connected to the bottom of the top plate, a water pipe is fixedly connected to the outer surface of the spray device, and a catalytic component is also provided at the bottom of the top plate.

[0007] After the pretreatment unit intercepts large particulate impurities and flocculent matter in the wastewater, the electrodes on the electrolysis plate, along with the catalytic components, oxidize and break down the wastewater.

[0008] Preferably, the electrolysis plates are symmetrically arranged on both sides of the enhanced decomposition tank, and the end of the water pipe furthest from the spray device is connected to a hydrogen peroxide solution.

[0009] Preferably, the catalytic assembly comprises a third servo motor, and an output end of the third servo motor is fixedly connected with a rotating rod, and one end of the rotating rod away from the third servo motor is fixedly connected with a first transmission disc.

[0010] Preferably, the top of the third servo motor is fixedly connected with the bottom of the top plate.

[0011] Preferably, the catalytic assembly further comprises a placing silo, and the outer surface of the placing silo is provided with a notch, and the inner wall of the placing silo is fixedly connected with a catalytic column, and catalytic particles are further placed between the catalytic column and the placing silo, and the catalytic column and the catalytic particles are both titanium dioxide catalysts, and both ends of the placing silo are fixedly connected with side columns, and the outer surface of the side column located below the first transmission disc is fixedly connected with a second transmission disc.

[0012] Preferably, the side column away from the placing silo is rotatably connected with the outer surface of the reinforced decomposition tank, and the outer surfaces of the first transmission disc and the second transmission disc are sleeved with a conductive track.

[0013] Preferably, the microwave device is towards the placing silo, and the spraying device is located at the top of the placing silo.

[0014] Preferably, the pretreatment unit comprises a support frame, the top of the support frame is fixedly connected with a first servo motor, the output end of the first servo motor is fixedly connected with a reciprocating screw rod, the outer surface of the support frame is fixedly connected with a guide rod, the outer surface of the reciprocating screw rod is threadedly connected with a filter frame, the top of the filter frame is fixedly connected with a first isolation net, the bottom of the filter frame is fixedly connected with a second isolation net, the outer surface of the filter frame is fixedly connected with a fixed plate, the inner wall of the fixed plate is fixedly connected with a second servo motor, the output end of the second servo motor is fixedly connected with an agitating fan, and the outer surface of the fixed plate is further fixedly connected with a protective cover covering the agitating fan.

[0015] Preferably, the bottom of the support frame is fixedly connected with the outer surface of the device shell, the outer surface of the filter frame is slidably connected with the outer surface of the guide rod, the fixed plate is located in the inner wall of the filter frame, and the holes of the second isolation net are smaller than those of the first isolation net.

[0016] A use method of the device for treating the difficult-to-degrade organic wastewater, comprising the following steps:

[0017] S1: first, the sewage is put into the pretreatment tank, the pretreatment tank intercepts large-particle impurities through the first isolation net, polyaluminum chloride and polyacrylamide are added, and colloidal pollutants are removed through the second isolation net to reduce the subsequent treatment load;

[0018] S2: then, the wastewater pretreated by the liquid pumping device is introduced into the reinforced decomposition tank;

[0019] S3: The decomposition unit will generate hydroxyl radicals by passing low-voltage direct current to the titanium-based iridium dioxide electrode, break the aromatic ring and halogen bond of the refractory organic matter, and convert the macromolecules into small molecules;

[0020] S4: At the same time, the microwave device will strengthen the activity of titanium dioxide, accelerate the generation of hydroxyl radicals, further degrade the residual refractory pollutants, and reduce the COD concentration.

[0021] Compared with the prior art, the beneficial effects of the present application are:

[0022] 1. The present application will first remove the large particle impurities and flocculent impurities of the wastewater by the pretreatment mechanism, reducing the subsequent treatment load.

[0023] 2. The decomposition unit passes low-voltage direct current to the titanium-based iridium dioxide electrode, thereby generating hydroxyl radicals, breaking the aromatic ring and halogen bond of the refractory organic matter, and converting the macromolecules into small molecules.

[0024] 3. While the titanium-based iridium dioxide electrode is working, the microwave unit will perform microwave action on the catalytic column and catalytic particles, thereby strengthening the activity of the catalyst, accelerating the generation of hydroxyl radicals, and further degrading the residual refractory pollutants.

[0025] 4. When the wastewater is not treated, the third servo motor drives the rotating rod and the first transmission disc to rotate, and through the conduction of the transmission track, the side column and the overall placement silo are rotated, so that the catalytic column and the catalytic particles are rubbed and collided, part of the loose accumulated carbon on the surface is removed, and at the same time, the spraying device sprays hydrogen peroxide solution on the placement silo, thereby destroying the adsorption bond of the accumulated carbon, thereby restoring the activity of the catalyst. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural schematic view of the present application.

[0027] Figure 2 It is a structural sectional view of the present application.

[0028] Figure 3 It is a structural schematic view of the pretreatment unit of the present application.

[0029] Figure 4 It is a structural sectional view of the pretreatment unit of the present application.

[0030] Figure 5 It is a structural schematic view of the decomposition unit of the present application.

[0031] Figure 6 It is a structural schematic view of the catalytic assembly of the present application.

[0032] Figure 7A catalytic assembly structure sectional view of the present application.

[0033] In the figure: 1, device shell; 2, support seat; 3, partition plate; 4, liquid pump; 5, pretreatment pool; 6, enhanced decomposition pool; 7, pretreatment unit; 8, decomposition unit; 9, water outlet; 71, support frame; 72, first servo motor; 73, reciprocating screw rod; 74, guide rod; 75, filter frame; 76, first isolation net; 77, second isolation net; 78, fixed plate; 79, second servo motor; 710, stirring fan; 711, protective cover; 81, electrolysis plate; 82, electrode; 83, first support column; 84, top plate; 85, second support column; 86, microwave device; 87, catalytic assembly; 88, spraying device; 89, water pipe; 8711, third servo motor; 872, rotating rod; 873, first transmission disc; 874, placement round bin; 875, side column; 876, second transmission disc; 877, transmission track; 878, notch; 979, catalytic column. DETAILED DESCRIPTION

[0034] The application will be further described below in conjunction with the drawings and specific embodiments. It should be noted that the following described embodiments or technical features can be combined in any manner to form new embodiments without conflict, and that the described embodiments are only a part of the embodiments of the application, not all. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0035] Please refer to Figures 1 to 7 The application provides a technical solution:

[0036] As Figures 1-2 shown, comprising: device shell 1, the bottom of the device shell 1 is fixedly connected with a support seat 2, the inner wall of the device shell 1 is fixedly connected with a partition plate 3, the partition plate 3 divides the device shell 1 into a pretreatment pool 5 and an enhanced decomposition pool 6, the outer surface of the partition plate 3 is fixedly connected with a liquid pump 4 for pumping wastewater in the pretreatment pool 5 into the enhanced decomposition pool 6, the outer surface of the device shell 1 is also fixedly connected with a water outlet 9, further comprising:

[0037] The pretreatment mechanism arranged in the pretreatment pool 5 and the decomposition unit 8 arranged in the enhanced decomposition pool 6;

[0038] In the working of the present application, first, the large particle impurities and flocculent impurities of the wastewater are removed in advance by the pretreatment mechanism, then the pretreated wastewater is introduced into the enhanced decomposition tank 6 by the liquid pump 4, the decomposition unit 8 breaks the aromatic ring and halogen bond of the refractory organic matter, converts the macromolecule into small molecule, at the same time, the microwave device 86 enhances the activity of titanium dioxide and accelerates the generation of hydroxyl radical to further degrade the residual refractory pollutants, finally, the treated wastewater flows out through the water outlet 9.

[0039] As shown in Figures 3-4 The pretreatment unit 7 includes a support frame 71, the top of the support frame 71 is fixedly connected with a first servo motor 72, the output end of the first servo motor 72 is fixedly connected with a reciprocating screw rod 73, the outer surface of the support frame 71 is fixedly connected with a guide rod 74, the outer surface of the reciprocating screw rod is threadedly connected with a filter frame 75, the top of the filter frame 75 is fixedly connected with a first isolation net 76, the bottom of the filter frame 75 is fixedly connected with a second isolation net 77, the outer surface of the filter frame is fixedly connected with a fixed plate 78, the inner wall of the fixed plate 78 is fixedly connected with a second servo motor 79, the output end of the second servo motor 79 is fixedly connected with an agitating fan 710, and the outer surface of the fixed plate is further fixedly connected with a protective cover 711 covering the agitating fan 710.

[0040] The bottom of the support frame 71 is fixedly connected with the outer surface of the device shell 1, the outer surface of the filter frame 75 is slidably connected with the outer surface of the guide rod 74, the fixed plate is located in the inner wall of the filter frame 75, and the hole of the second isolation net 77 is smaller than that of the first isolation net 76.

[0041] When the sewage is introduced into the pretreatment tank 5, the first isolation net 76 separates the large particle impurities first, then polyaluminum chloride and polyacrylamide are added, the second servo motor 79 drives the agitating fan 710 to rotate, so that the polyaluminum chloride and polyacrylamide are in full contact with the sewage, thereby coagulating the flocculent pollutants in the sewage and being separated by the second isolation net 77, the first servo motor 72 drives the reciprocating screw rod 73 to rotate, so that the filter frame 75 moves upward to separate the large particle impurities and the colloidal pollutants from the water body, then the liquid pump 4 introduces the pretreated wastewater into the enhanced decomposition tank 6.

[0042] As shown in Figure 5 The decomposition unit 8 includes an electrolytic plate 81, the outer surface of the electrolytic plate 81 is fixedly connected with an electrode 82, specifically a titanium-based iridium dioxide electrode 82, the top of the electrolytic plate 81 is fixedly connected with a first support column 83, the top of the first support column 83 is fixedly connected with a top plate 84, the outer surface of the top plate 84 is fixedly connected with a second support column 85, the bottom of the second support column 85 is fixedly connected with a microwave device 86, the bottom of the top plate 84 is fixedly connected with a spraying device 88, the outer surface of the spraying device 88 is fixedly connected with a water pipe 89, and the bottom of the top plate 84 is further provided with a catalytic assembly 87.

[0043] By low-voltage direct current to the titanium-based iridium dioxide electrode 82, hydroxyl radicals are generated to break the aromatic ring and halogen bond of the refractory organic matter, and convert the macromolecules into small molecules.

[0044] After the pretreatment mechanism intercepts the large particle impurities and flocculation in the wastewater, the electrode 82 on the electrolytic plate 81 will oxidize and destroy the subsequent wastewater with the catalytic assembly 87.

[0045] The electrolytic plate 81 is symmetrically arranged on both sides of the reinforced decomposition tank 6, and the water pipe 89 is connected to the hydrogen peroxide solution at the end away from the spraying device 88.

[0046] As shown in Figures 6-7 The catalytic assembly 87 includes a third servo motor 8711, and the output end of the third servo motor 8711 is fixedly connected with a rotating rod 872, and the end of the rotating rod 872 away from the third servo motor 8711 is fixedly connected with a first transmission disc.

[0047] The top of the third servo motor 8711 is fixedly connected with the bottom of the top plate 84.

[0048] The catalytic assembly 87 further includes a placing round bin 874, the outer surface of the placing round bin 874 is provided with a notch 878, the inner wall of the placing round bin 874 is fixedly connected with a catalytic column 979, and catalytic particles are further placed between the catalytic column 979 and the placing round bin 874. The catalytic column 979 and the catalytic particles are both titanium dioxide catalysts, both ends of the placing round bin 874 are fixedly connected with side columns 875, and the outer surface of the side column 875 below the first transmission disc is fixedly connected with a second transmission disc.

[0049] The microwave unit will act on the catalytic column 979 and the catalytic particles to strengthen the activity of the catalyst, accelerate the generation of hydroxyl radicals, and further degrade the residual refractory pollutants.

[0050] The microwave unit will act on the catalytic column 979 and the catalytic particles to strengthen the activity of the catalyst, accelerate the generation of hydroxyl radicals, and further degrade the residual refractory pollutants.

[0051] The side column 875 away from the placing round bin 874 is rotatably connected with the outer surface of the reinforced decomposition tank 6, and the outer surfaces of the first transmission disc and the second transmission disc 876 are sleeved with a conductive track.

[0052] The microwave device 86 faces the placing round bin 874, and the spraying device 88 is located at the top of the placing round bin 874.

[0053] A use method of a refractory organic wastewater treatment device, comprising the following steps:

[0054] S1: First, the sewage is put into the pretreatment tank 5, which will intercept large particle impurities through the first isolation net 76, add polyaluminum chloride and polyacrylamide, remove colloidal pollutants through the second isolation net 77, and reduce the subsequent treatment load;

[0055] S2: After that, the liquid suction machine 4 will guide the pretreated wastewater into the enhanced decomposition tank 6.

[0056] S3: The decomposition unit 8 will generate hydroxyl radicals by passing low-voltage direct current through the titanium-based iridium dioxide electrode 82, break the aromatic ring and halogen bond of refractory organic matter, and convert macromolecules into small molecules.

[0057] S4: At the same time, the microwave device 86 will enhance the activity of titanium dioxide, accelerate the generation of hydroxyl radicals, further degrade the residual refractory pollutants, and reduce the COD concentration.

[0058] The above embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Those skilled in the art can make various modifications without creative labor, and all modifications fall within the scope of protection of the present application.

Claims

1. A device for treating recalcitrant organic wastewater, characterized in that, include: The device includes a housing, with a support base fixedly connected to its bottom. A partition plate is fixedly connected to the inner wall of the housing, dividing the interior into a pretreatment tank and an enhanced decomposition tank. A pump for drawing wastewater from the pretreatment tank into the enhanced decomposition tank is fixedly connected to the outer surface of the partition plate. An outlet is also fixedly connected to the outer surface of the housing. The device further includes: A pretreatment mechanism installed in a pretreatment tank and a decomposition unit installed in an enhanced decomposition tank; The decomposition unit includes an electrolysis plate, electrodes are fixedly connected to the outer surface of the electrolysis plate, a first support column is fixedly connected to the top of the electrolysis plate, a top plate is fixedly connected to the top of the first support column, a second support column is fixedly connected to the outer surface of the top plate, a microwave device is fixedly connected to the bottom of the second support column, a spray device is fixedly connected to the bottom of the top plate, a water pipe is fixedly connected to the outer surface of the spray device, and a catalytic component is also provided at the bottom of the top plate. After the pretreatment unit intercepts large particulate impurities and flocculent matter in the wastewater, the electrodes on the electrolysis plate, along with the catalytic components, oxidize and break down the wastewater.

2. The device for treating recalcitrant organic wastewater according to claim 1, characterized in that: The electrolysis plates are symmetrically arranged on both sides of the enhanced decomposition tank, and the end of the water pipe furthest from the spray device is connected to a hydrogen peroxide solution.

3. The device for treating recalcitrant organic wastewater according to claim 1, characterized in that: The catalytic component includes a third servo motor, the output end of which is fixedly connected to a rotating rod, and the end of the rotating rod away from the third servo motor is fixedly connected to a first transmission disk.

4. The device for treating recalcitrant organic wastewater according to claim 3, characterized in that: The top of the third servo motor is fixedly connected to the bottom of the top plate.

5. The device for treating recalcitrant organic wastewater according to claim 3, characterized in that: The catalytic assembly also includes a placement chamber with a notch on its outer surface. A catalytic column is fixedly connected to the inner wall of the placement chamber. Catalytic particles are placed between the catalytic column and the placement chamber. Side columns are fixedly connected to both ends of the placement chamber. A second transmission disk is fixedly connected to the outer surface of the side column located below the first transmission disk.

6. The device for treating recalcitrant organic wastewater according to claim 5, characterized in that: The side post away from the placement of the cylindrical container is rotatably connected to the outer surface of the enhanced decomposition tank, and the outer surfaces of the first and second transmission discs are fitted with conductive tracks.

7. The device for treating recalcitrant organic wastewater according to claim 6, characterized in that: The microwave device faces the placement of the cylindrical hopper, and the spray device is located on top of the placement of the cylindrical hopper.

8. The device for treating recalcitrant organic wastewater according to claim 1, characterized in that: The pretreatment unit includes a support frame, a first servo motor fixedly connected to the top of the support frame, a reciprocating lead screw fixedly connected to the output end of the first servo motor, a guide rod fixedly connected to the outer surface of the support frame, a filter frame threadedly connected to the outer surface of the reciprocating lead screw, a first isolation mesh fixedly connected to the top of the filter frame, a second isolation mesh fixedly connected to the bottom of the filter frame, a fixing plate fixedly connected to the outer surface of the filter frame, a second servo motor fixedly connected to the inner wall of the fixing plate, an agitator fixedly connected to the output end of the second servo motor, and a protective cover covering the agitator fixedly connected to the outer surface of the fixing plate.

9. The device for treating recalcitrant organic wastewater according to claim 8, characterized in that: The bottom of the support frame is fixedly connected to the outer surface of the device housing, the outer surface of the filter frame is slidably connected to the outer surface of the guide rod, the fixing plate is located on the inner wall of the filter frame, and the holes of the second isolation net are smaller than those of the first isolation net.

10. A method of using a recalcitrant organic wastewater treatment device, applicable to the recalcitrant organic wastewater treatment device according to any one of claims 1-9, characterized in that, Includes the following steps: S1: First, the wastewater is put into the pretreatment tank. The pretreatment tank will intercept large particulate impurities through the first isolation net, add polyaluminum chloride and polyacrylamide, and remove colloidal pollutants through the second isolation net to reduce the load of subsequent treatment. S2: The pre-treated wastewater is then pumped into the enhanced decomposition tank. S3: The decomposition unit will generate hydroxyl radicals by passing low-voltage direct current through a titanium-based iridium dioxide electrode, which will break the aromatic rings and halogen bonds of recalcitrant organic matter and convert macromolecules into small molecules. S4: At the same time, the microwave device will enhance the activity of titanium dioxide, accelerate the generation of hydroxyl radicals, further degrade residual recalcitrant pollutants, and reduce COD concentration.

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