Folded plate ozone-electro-Fenton coupling reaction device

Abstract

The utility model discloses a folded plate ozone-electro-Fenton coupling reaction device, and relates to the technical field of sewage treatment. The device comprises a reactor, a plurality of folded plate electrodes arranged in the reactor and ozone aeration pipelines arranged between the adjacent folded plate electrodes, and the ozone aeration pipelines are connected with an ozone generator. The folded plate electrodes are sequentially arranged in a staggered mode in the length direction of the reactor, and gaps are alternately reserved between the folded plate electrodes and side plates of the reactor. The device solves the problems that solids generated in the ozone electro-Fenton coupling wastewater treatment process can block an ozone inlet and the standing time of ozone is short, the ozone flows from the two side plates of the reactor to the center along the folded plate electrode from the two sides of the reactor, and the coupling efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial wastewater treatment equipment technical field especially relates to a kind of folded plate ozone-electric Fenton coupling reaction device. BACKGROUND

[0002] Ozone oxidation technology is through ozone direct oxidation or indirectly generates hydroxyl radical and then oxidizes pollutants in wastewater to achieve the purpose of treating wastewater.Its main advantage is rapid reaction, simple process, no secondary pollution problem.Electric Fenton technology is to generate Fe 2+ And H2O2 by electrochemistry, further generates hydroxyl radical to treat wastewater.Electric Fenton method has the characteristics of electrochemical reaction and Fenton reaction, with strong oxidation capacity, low energy consumption, etc., and is considered as an environment-friendly treatment method.

[0003] Existing electrochemistry-ozone combined technology, but due to its structure and aeration mode, the processing efficiency is low, such as patent number ZL202222435254.9 China patent discloses a kind of high-efficiency heterogeneous ozone-electric Fenton combined catalytic oxidation reaction device, adopts flat plate electrode as electric Fenton electrode, adopts the aeration disc arranged at the bottom of electrode to carry out aeration, ozone is short in residence time when being aerated from bottom to top, and the sludge generated is easy to block ozone aeration mechanism, and the flat plate electrode used has small contact area with waste liquid, which seriously affects the processing efficiency. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a kind of folded plate ozone-electric Fenton coupling reaction device, significantly improve wastewater treatment effect.

[0005] The technical scheme adopted by the utility model to solve the technical problem is:

[0006] A kind of folded plate ozone-electric Fenton coupling reaction device, the device includes reactor, a plurality of folded plate electrodes arranged in the reactor and ozone aeration pipeline arranged between adjacent folded plate electrodes, and ozone aeration pipeline is connected to ozone generator.

[0007] Further, the plurality of folded plate electrodes are staggered along the length direction of the reactor in sequence, and a plurality of gaps are alternately left between the plurality of folded plate electrodes and the side plates of the reactor.

[0008] Further, the ozone aeration pipeline is a reverse omega-shaped pipeline, which comprises an extension pipeline at the upper end, an aeration pipeline at the middle part, and a horizontal pipeline at the lower end, one side of the extension pipeline is connected with the ozone generator through a pipeline, and the horizontal pipeline is parallel to the bottom of the reactor; the upper end of the aeration pipeline is connected with the extension pipeline, the lower end is connected with the horizontal pipeline, and the aeration pipeline is provided with a plurality of pairs of aeration holes in the height direction, and each pair of aeration holes faces two adjacent folded plate electrodes.

[0009] Further, the distance between the adjacent aeration holes in the height direction is 10-100 mm, the distance between the lowermost aeration hole and the bottom plate of the reactor is 8-10 mm, the horizontal pipeline is in contact with the inner wall of the bottom of the reactor, and the aeration pipeline is in contact with the side wall of the reactor.

[0010] Further, the folding angle of the folded plate electrode is 70-105°, the length of the two sides of each folding angle of the folded plate electrode is equal, one side of the folding angle is defined as the side length of the folded plate electrode, the side length is 20-50 mm, and the distance between the adjacent two folded plate electrodes is 10-40 mm; no air hole is arranged on the folded plate electrode.

[0011] Further, the reactor is a rectangular parallelepiped structure with an open upper end surrounded by front and rear end plates, left and right side plates and a bottom plate, and a plurality of array grooves for mounting the folded plate electrodes are arranged on the two side plates at equal intervals along the length direction of the reactor, and the groove spacing is 10-40 mm.

[0012] Further, the reaction device is provided with a cover plate, an air outlet is arranged on the cover plate, the cover plate is covered on the reactor 3, a water inlet 2 is arranged in the middle part of the front end plate of the reactor 3, and a water outlet 7 is arranged at the bottom of the rear end plate of the reactor 3; the water inlet is connected with the outlet of the centrifugal pump 8 through a flow meter 9, the outlet of the centrifugal pump 8 is connected with the water outlet 7, the upper air outlet of the reactor is connected with an ozone tail gas absorption bottle 10 through an ozone pipeline, and the ozone tail gas absorption bottle is connected with one side of the ozone aeration pipeline.

[0013] Further, the reactor is made of insulating non-metal, the groove depth is 5-10 mm, and the groove is not a through groove, which can accommodate and limit the installation position of the folded plate electrode on the reactor.

[0014] Further, the size range of the reactor is: length 100 mm-10000 mm, width 100 mm-2000 mm, and height 100 mm-1500 mm.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1) The utility model discloses a fold plate electrode replaces flat plate electrode, increases the contact area of electrode plate and waste water, and cooperates ozone aeration pipeline, arranges ozone aeration pipeline between fold plate electrode, and ozone bubble flow strengthens the gas-liquid mass transfer process of fold plate electrode area, realizes the coupling of ozone and electric fenton high efficiency, further improves the oxidation ability to pollutant, improves the waste water treatment efficiency.

[0017] 2) The utility model discloses a fold plate electrode not only increases the contact area of electrode plate and waste water, but also prolongs the residence time of ozone in the reactor, opens the aeration hole along the height direction on the side of ozone aeration pipe, changes the relative position of electrode plate and ozone aeration pipeline, solves the problem that the residence time of bottom aeration ozone is short and is easy to be blocked by sludge, improves the utilization rate of ozone, thereby improving the waste water treatment effect.

[0018] 3) The utility model discloses a new type of aeration pipeline, and the aeration pipeline contacts three inner walls of the reactor, can realize better treatment effect, through optimizing the structure and opening position of ozone pipeline, considering the relative position of fold plate and pipeline, can realize more efficient coupling of ozone and electric fenton.

[0019] 4) The utility model discloses under the same condition, more saves the equipment investment, reduces the power consumption of device, reduces the generation of sludge, realizes the efficient oxidation degradation process of waste water, reaches the purpose of energy saving and emission reduction. DRAWINGS

[0020] The drawings attached to the part of the specification of the utility model are used to provide further understanding on the utility model, and the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawing, the mutual distance or size is exaggerated for showing the position of each part, and the schematic diagram is only for the purpose of demonstration.

[0021] Figure 1 It is the structure schematic view of fold plate ozone-electric fenton coupling reaction device of one embodiment of the utility model.

[0022] Figure 2 It is the overhead structure schematic view of one embodiment reactor 3.

[0023] Figure 3 It is the arrangement structure schematic view of fold plate electrode and ozone aeration pipeline.

[0024] Figure 4 It is the structure schematic view of ozone aeration pipeline of one embodiment of the utility model.

[0025] Wherein, 1, ozone generator; 2, water inlet; 3, reactor; 4, folded plate electrode; 5, DC power supply; 6, ozone aeration pipeline; 7, water outlet; 8, centrifugal pump; 9, flow meter; 10, ozone tail gas absorption bottle; 11 aeration hole. DETAILED DESCRIPTION

[0026] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the utility model. Unless otherwise specified, all technical and scientific terms used in the utility model have the same meaning as generally understood by those skilled in the art to which the utility model belongs.

[0027] The folded plate electrode in the utility model is divided into two kinds of cathode made of metal material or carbon material and anode made of metal material, the carbon material is graphite felt, carbon felt, modified carbon felt, etc., the metal material is iron, platinum, titanium, etc., and the selection of specific cathode and anode material is determined according of actual conditions, and the cathode and anode plates are alternately arranged at different positions and connected with the cathode and anode of the DC power supply respectively.

[0028] Preferably, the folded plate electrode has an angle of 70-105 °, the length of the two sides of each angle of the folded plate electrode is equal, one side of the angle is defined as the side length of the folded plate electrode, the side length is 20-50 mm, and the distance between the adjacent two folded plate electrodes is 10-40 mm.

[0029] The folded plate electrode is not provided with air holes.

[0030] Further, a gap is alternately left between one side of each folded plate electrode and the two side plates of the reactor, the S-shaped flow of the fluid in the tank can be realized, and the size of the gap is 10-300 mm.

[0031] Further, the ozone aeration pipeline is arranged between every two folded plate electrodes, if there are multiple groups of folded plate electrodes, multiple ozone aeration pipelines 6 need to be arranged. The aeration holes are opened on the side surface of the ozone aeration pipeline in the height direction, the upward speed of the bubbles is reduced, and the ozone utilization rate is improved.

[0032] The bottom of the folded plate electrode and the bottom of the ozone aeration pipeline can be supported by the bottom plate of the reactor in the utility model.

[0033] Example 1

[0034] Referring to Figure 1 A folded plate ozone-electric Fenton coupling reaction device schematic diagram, including reactor 3, a plurality of folded plate electrodes arranged in the reactor, and ozone aeration pipeline 6 arranged between adjacent folded plate electrodes, and cover plate (not marked in the figure).

[0035] The cover plate is provided with an air outlet, the cover plate is covered on the reactor 3, the middle part of the front end plate of the reactor 3 is provided with a water inlet 2, and the bottom of the rear end plate of the reactor 3 is provided with a water outlet 7; the water inlet is connected with the outlet of the centrifugal pump 8 through the flowmeter 9, the outlet of the centrifugal pump 8 is connected with the water outlet 7; the upper air outlet of the reactor is connected with the ozone tail gas absorption bottle 10 through the ozone pipeline, and the ozone tail gas absorption bottle is connected with one side of the ozone aeration pipeline. The other side of the ozone aeration pipeline is connected with the ozone generator 1. The folded plate electrode is connected with the direct current power supply 5.

[0036] The utility model discloses a reactor 3 front end plate middle part is equipped with water inlet 2, reactor 3 rear end plate bottom is equipped with water outlet 7, when using, the wastewater to be handled is passed into reactor 3, and the ozone generator 1 is opened and is connected direct current power supply 5, then starts centrifugal pump 8, and the liquid phase flow rate is controlled through the adjustment flowmeter 9, and the liquid phase is S type flow in the reactor, referring to Figure 2 Ozone continuously sprays from the aeration hole 11 in the ozone aeration pipeline 6, and the residence time of ozone is prolonged under the blocking effect of the folded plate electrode 4, and ozone is introduced from the side to flush the folded plate electrode 4, so that the blocking of sludge is reduced, the treatment effect of the ozone electro-Fenton coupling is strengthened, and the tail gas of the ozone aeration pipeline is absorbed by the ozone tail gas absorption bottle 10.

[0037] Example 2

[0038] In the reaction device of the embodiment, the reactor 3 is a cuboid structure composed of one bottom plate, two end plates and two side plates, and is made of insulating non-metal, such as tempered glass, and has a size range of 100 mm to 10000 mm in length, 100 mm to 2000 mm in width and 100 mm to 1500 mm in height; the middle part of the front end plate is provided with a water inlet 2, and the bottom of the rear end plate is provided with a water outlet 7; the side plates of the reactor 3 are provided with array grooves with equal intervals along the length direction of the reactor, and the number of the array grooves can be greater than the number of the folded plate electrodes (i.e. electrode plates) to be installed, so that the installation positions of the electrode plates can be adjusted as required; the groove spacing is 10 mm to 40 mm, and the groove is a non-through hole structure.

[0039] The plurality of folded plate electrodes are arranged in a staggered manner along the length direction of the reactor, and the folded plate electrodes are fixed by the grooves of the two side plates. The ozone aeration pipeline 6 is located between the two folded plate electrodes, the opening direction of the aeration holes on the ozone aeration pipeline 6 is towards the adjacent folded plate electrode, and a pair of aeration holes are symmetrically arranged on both sides of the ozone aeration pipeline. The aeration holes on the ozone aeration pipeline are all located below the liquid level in the reactor, and the number of the aeration holes arranged along the height direction can be one pair or multiple pairs according to the liquid level height. The multiple pairs of aeration holes are arranged at equal intervals along the height direction, and the interval between the adjacent aeration holes along the height direction is 10 to 100 mm.

[0040] Example 3

[0041] The ozone aeration pipeline in the embodiment is a reverse omega-shaped pipeline, which comprises an extension pipeline at the upper end, an aeration pipeline at the middle part, and a horizontal pipeline at the lower end. One side of the extension pipeline is connected with the ozone generator through a pipeline. The horizontal pipeline is parallel to the bottom of the reactor. The upper end of the aeration pipeline is connected with the extension pipeline, and the lower end is connected with the horizontal pipeline. The aeration pipeline is provided with a plurality of pairs of aeration holes in the height direction, and each pair of aeration holes faces two adjacent folded plate electrodes.

[0042] The ozone aeration pipeline 6 is arranged in contact with the inner walls of the two sides and the bottom of the reactor. This arrangement does not affect the flow of the material in the reactor. According to the position of the opening, the distance between the lowermost aeration hole and the reactor bottom plate is about 10 mm. Ozone flows from the two sides of the reactor to the center along the folded plate electrodes, further improving the wastewater treatment efficiency.

[0043] Embodiment 4

[0044] In the embodiment, the groove is a rectangular long slot or an oblique long slot. The groove width can accommodate the width of the folded plate electrode, so that the folded plate electrode is just at the position of the groove, and the position of the folded plate electrode does not move obviously during use under the flow rate of wastewater treatment.

[0045] Embodiment 5

[0046] In the embodiment, the reaction device is used to treat ofloxacin pharmaceutical wastewater (pH = 7, treatment capacity 500 kg / h, concentration 20 mg / L)

[0047] 500 kg of ofloxacin pharmaceutical wastewater is treated per hour. The volume of the reactor used is 0.275 m³ (length 1000 mm, width 550 mm, height 500 mm). The number of folded plate electrodes is 16. The folded angle of the folded plate electrode is 80°. One side of the folded angle is the side length of the folded plate electrode, which is 45 mm. The distance between the adjacent two folded plate electrodes is 35 mm. One side of each folded plate electrode is alternately left with a gap between the two side plates of the reactor, and the gap size is 250 mm. An array of grooves is opened along the length direction of the reactor at equal intervals, and the groove spacing is 30 mm. The number of aeration holes arranged in the height direction is 2 pairs. The 2 pairs of aeration holes are arranged at equal intervals in the height direction, and the distance between the adjacent aeration holes in the height direction is 85 mm.

[0048] The power supply is turned on to maintain a current of 2 A, and ozone is simultaneously introduced to maintain a total gas flow of 1900 L / min, with an ozone proportion of 50%. The reaction time is 40 min. After the reaction, samples are taken, and the treatment effect is analyzed by using an ultraviolet spectrophotometer.

[0049] Comparative Example 1: A single electro-Fenton control group was set up, in the same reactor, the same pH value as Example 5, simulated wastewater concentration and dosage, maintain the current size 2A, in the same reaction time, sampling detection. This control group uses an ozone generator, but not into the ozone, only into the air, the total air flow is 1200 L / min.

[0050] Comparative Example 2: A single ozone oxidation control group was set up, in the same reactor, the same pH value as Example 1, simulated wastewater concentration and dosage, maintain the total gas flow is 2400 L / min, ozone ratio is 50%, in the same reaction time, sampling detection. This control group does not open the power.

[0051] After 40 minutes of reaction in each group, the absorption peak drop rate was detected using a UV spectrophotometer, and the results are shown in Table 1 below:

[0052]

[0053] As can be seen from the above table, the device of the present application can significantly improve the oxidation ability of pollutants and improve the wastewater treatment efficiency.

[0054] Although the specific embodiments of the present application have been described above with reference to the accompanying drawings, the present application is not limited to the scope of the above description, and those skilled in the art should understand that various modifications or variations made on the basis of the technical solutions of the present application without creative labor are still within the scope of protection of the present application.

[0055] The unmentioned parts of the present application are applicable to the prior art.

Claims

1. A kind of folding plate ozone-electric Fenton coupling reaction device, it is characterized in that, The device comprises a reactor, a plurality of folded plate electrodes arranged in the reactor, and an ozone aeration pipeline arranged between adjacent folded plate electrodes, the ozone aeration pipeline being connected with an ozone generator.

2. The folded plate ozone-electro-Fenton coupling reaction device according to claim 1, characterized in that, The plurality of folded plate electrodes are staggered along the length direction of the reactor, and gaps are alternately left between the plurality of folded plate electrodes and the side plates of the reactor.

3. The folded plate ozone-electro-Fenton coupling reaction device according to claim 1, characterized in that, The ozone aeration pipeline is a reverse omega-shaped pipeline, which comprises an extension pipeline at the upper end, an aeration pipeline at the middle part, and a horizontal pipeline at the lower end, one side of the extension pipeline being connected with the ozone generator through a pipeline, and the horizontal pipeline being parallel to the bottom of the reactor; the upper end of the aeration pipeline is connected with the extension pipeline, and the lower end of the aeration pipeline is connected with the horizontal pipeline, and a plurality of pairs of aeration holes are arranged on the aeration pipeline along the height direction, each pair of aeration holes facing two adjacent folded plate electrodes.

4. The folded plate ozone-electro-Fenton coupling reaction device according to claim 3, characterized in that, The distance between adjacent aeration holes along the height direction is 10-100 mm, the distance between the lowermost aeration hole and the bottom plate of the reactor is 8-10 mm, the horizontal pipeline is in contact with the inner wall of the bottom of the reactor, and the aeration pipeline is in contact with the side wall of the reactor.

5. The folded plate ozone-electro-Fenton coupling reaction device according to claim 1, characterized in that, The folding angle of the folded plate electrode is 70-105°, the length of the two sides of each folding angle of the folded plate electrode is equal, one side of the folding angle is defined as the side length of the folded plate electrode, the side length is 20-50 mm, and the distance between adjacent two folded plate electrodes is 10-40 mm; no aeration hole is arranged on the folded plate electrode.

6. The folded plate ozone-electro-Fenton coupling reaction device according to claim 1, characterized in that, The reactor is a rectangular parallelepiped structure with an open upper end, which is surrounded by front and rear end plates, left and right side plates, and a bottom plate, and array grooves for mounting the folded plate electrodes are arranged on the two side plates at equal intervals along the length direction of the reactor, and the groove spacing is 10-40 mm.

7. The folded plate ozone-electro-Fenton coupling reaction device according to claim 6, characterized in that, The reaction device is provided with a cover plate, an air outlet is arranged on the cover plate, the cover plate is covered on the reactor (3), a water inlet (2) is arranged in the middle part of the front end plate of the reactor (3), and a water outlet (7) is arranged at the bottom of the rear end plate of the reactor (3); the water inlet is connected with the outlet of a centrifugal pump (8) through a flow meter (9), the outlet of the centrifugal pump (8) is connected with the water outlet (7); the upper air outlet of the reactor is connected with an ozone tail gas absorption bottle (10) through an ozone pipeline, and the ozone tail gas absorption bottle is connected with one side of the ozone aeration pipeline.

8. The folded plate ozone-electro-Fenton coupling reaction device according to claim 6, characterized in that, The reactor is made of insulating non-metal, the groove depth is 5-10 mm, and the groove is not a through groove, which can accommodate and limit the installation position of the folded plate electrode on the reactor.

9. The folded plate ozone-electro-Fenton coupling reaction device according to claim 6, characterized in that, The size range of the reactor is: length 100-10000 mm, width 100-2000 mm, and height 100-1500 mm.

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