A fluidized bed type Fenton treatment system

Abstract

The present invention relates to the technical field of industrial sewage treatment, and particularly relates to a fluidized bed Fenton treatment system. It includes: a reaction tank; an input mechanism which is arranged at the bottom of the reaction tank and is used for inputting sewage and air; an aeration mechanism which is arranged above the input mechanism and is used for carrying out an aeration reaction on the sewage. The aeration mechanism includes a reflux component for promoting the full contact between air and sewage and a steady flow component which is arranged on the reflux component and is used for maintaining the stable upward flow of the jet flow; a purification mechanism which is arranged above the aeration mechanism and is used for carrying out Fenton treatment on the aerated sewage. The purification mechanism includes an addition component for adding medicaments and a catalytic component which is arranged in the middle of the addition component and is used for promoting the purification effect of the fluidized bed. It solves the technical problems of uneven sewage treatment effect and slow rate.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial sewage treatment, and particularly relates to a fluidized bed type Fenton treatment system. Background Art

[0002] The main principle of the Fenton chemical oxidation technology is that the externally added H2O2 oxidant and Fe2+ catalyst, namely the so-called Fenton reagent, will react to generate hydroxyl radicals (OH.) at an appropriate pH. The high oxidation ability of the hydroxyl radicals reacts with the organic matter in the wastewater, decomposing and oxidizing the organic matter, thereby reducing the COD that is difficult to decompose biologically in the wastewater. And the printing and dyeing wastewater contains antimony metal, and the iron salt has the best antimony removal effect in an acidic environment.

[0003] The fluidized bed - Fenton system uses the fluidized bed method to make most of the trivalent iron generated by the Fenton method crystallize or precipitate and coat on the surface of the carrier of the fluidized bed. It is a new technology that combines functions such as homogeneous chemical oxidation (Fenton method), heterogeneous chemical oxidation (H2O2 / FeOOH), fluidized bed crystallization, and reduction and dissolution of FeOOH. This technology has greatly improved the traditional Fenton oxidation method. In this way, a large amount of chemical sludge production in the traditional Fenton method can be reduced. At the same time, the iron oxide formed on the surface of the carrier has a heterogeneous catalytic effect, and the fluidized bed method also promotes the chemical oxidation reaction and mass transfer efficiency, improving the COD removal rate.

[0004] The patent document with the patent number CN108609717A discloses a Fenton oxidation fluidized bed reactor, including a reactor bottom plate. A cylindrical body is fixedly installed on the reactor bottom plate. A water inlet pipe and an acid inlet pipe are provided on the upper left side of the cylindrical body. The right side of the water inlet pipe penetrates through the cylindrical body and is communicated with an inlet cone hopper. A flow guide device is arranged inside the inlet cone hopper. A main reaction area is arranged inside the cylindrical body. A photosensitization treatment device is arranged on the right side outside the cylindrical body. An upper return pipe is connected to the top of the photosensitization treatment device. A lower return pipe is fixedly connected to the bottom of the photosensitization treatment device. The bottom of the lower return pipe is connected to a return pump. The liquid outlet pipe of the return pump is communicated with the lower right side of the cylindrical body. A sludge discharge port and a maintenance manhole are arranged at the bottom of the cylindrical body.

[0005] However, in the actual use process, the aeration link and the Fenton treatment link need to be completed by two sets of equipment. Also, when using the fluidized bed to treat sewage, there are problems such as uneven treatment effect and low rate. Summary of the Invention

[0006] The object of the present invention is to address the deficiencies of the prior art. By providing an input mechanism, an aeration mechanism, and a purification mechanism, the aeration process and the Fenton treatment process are centralized, and the flow of gas and water is utilized to promote each other, improving the uniformity of sewage treatment, thereby solving the technical problems of uneven sewage treatment effect and slow rate.

[0007] For the above technical problems, the following technical solutions are adopted:

[0008] A fluidized bed type Fenton treatment system includes a precipitation unit for pre-treating sewage, an oxidation unit disposed behind the precipitation unit for performing Fenton oxidation reaction on the sewage, and a deep treatment unit disposed behind the oxidation unit for performing biological treatment on the sewage. The oxidation unit includes:

[0009] A reaction tank;

[0010] An input mechanism, which is disposed at the bottom of the reaction tank and is used for inputting sewage and air;

[0011] An aeration mechanism, which is disposed above the input mechanism and is used for performing aeration reaction on the sewage. The aeration mechanism includes a reflux assembly for promoting full contact between air and sewage and a steady flow assembly disposed on the reflux assembly and used for maintaining the stable upward flow of the jet flow;

[0012] A purification mechanism, which is disposed above the aeration mechanism and is used for performing Fenton treatment on the aerated sewage. The purification mechanism includes an addition assembly for adding agents and a catalytic assembly disposed in the middle of the addition assembly and used for promoting the purification effect of the fluidized bed.

[0013] Preferably, the input mechanism includes a sewage input port disposed at the middle position of the bottom of the reaction tank, an air input pipe that penetrates from the bottom of the reaction tank and has a horizontal annular upper part, a concave platform disposed above the sewage input port and the air input pipe and having a spherical middle part, a cutting net disposed at the lower part of the concave platform, and a first filter net disposed around the top of the concave platform.

[0014] Preferably, the reflux assembly includes an isolation cylinder disposed on the top of the concave platform, an aeration chamber disposed in the middle of the isolation cylinder and having water inlets at both the lower and upper parts, a confluence plate disposed at the lower part of the aeration chamber, above the water inlet and having a water inlet in the middle, a partition plate disposed on the outer side of the top of the aeration chamber, an impeller rotatably connected to the water inlet in the middle of the confluence plate, and fillers disposed in the aeration chamber.

[0015] Preferably, the flow stabilizing assembly includes multiple groups of air ducts arranged on the inner surface of the isolation chamber. The top of the air duct communicates with the outside of the aeration chamber, and a pressure valve is provided at the air inlet. A push plate that is vertically slidably connected inside the air duct, and multiple groups of wedge-shaped sliders that are slidably connected around the bottom of the aeration chamber. A hose is provided between the air duct and the wedge-shaped slider, and the hose communicates with the air duct and the wedge-shaped slider. Gas check valves are provided at both ends of the hose. The impeller drives the movement of the push plate and the wedge-shaped slider through the driving mode of the gear and the lead screw.

[0016] Preferably, the flow stabilizing assembly further includes a static flow table arranged in the middle of the aeration chamber and with an arc-shaped lower bottom surface, multiple water stop rings with gradually decreasing inner diameters from top to bottom in the horizontal position above the static flow table, and multiple groups of blades arranged on the periphery of the static flow table. The blades are rotationally connected to the outside of the static flow table along the circumferential axis of the static flow table and are fixed by torsion springs.

[0017] Preferably, the adding assembly includes a partition chamber arranged above the aeration chamber and located on the outer side inside the reaction tank. Multiple chambers are provided in the partition chamber, and the bottom of each chamber communicates with the aeration chamber, and a water outlet is provided at the upper part. It also includes a liquid infusion member arranged inside each chamber of the partition chamber.

[0018] Preferably, the liquid infusion member includes a liquid inlet pipe for introducing an oxidant into each chamber of the partition chamber. The lower end of the liquid inlet pipe is communicated with a discharging pipe, and the discharging pipe is hinged to the liquid inlet pipe. Vertical pipes are provided on both sides of the discharging pipe and are communicated with the liquid inlet pipe. Multiple horizontal pipes with nozzles at the bottom are arranged in the middle, and the horizontal pipes are arranged in an inclined straight line with each other;

[0019] It further includes a driving unit for driving the discharging pipe to swing up and down along the hinge axis. The driving unit includes a flap arranged below the discharging pipe, a cam arranged near the flap, and a fan blade fixedly connected to the cam and arranged at the water inlet of the chamber.

[0020] Preferably, the catalytic assembly includes a reflux cylinder arranged in the middle of the partition chamber and with a water tank at the lower end, a second filter plate arranged at the upper end outlet of the reflux cylinder, and an air exhalation member arranged at the lower part of the reflux cylinder;

[0021] The air exhalation member includes an air cavity arranged at the bottom of the reflux cylinder and with an opening at the upper part, a hinge arranged at the top opening of the air cavity for controlling the opening and closing of the air cavity, a piston slidably connected inside the air cavity and controlled by a telescopic cylinder, a through pipe arranged on the side wall of the air cavity and conducting the air cavity to the top of the aeration chamber, and a gas check valve arranged inside the through pipe.

[0022] Preferably, the catalytic assembly further includes a rotating frame slidably connected to the side wall of the reflux cylinder and with the inner side extending into the reflux cylinder. A water pump is arranged on the outer side of the rotating frame and communicated with a spray pipe inside, and the spray pipe is oriented obliquely tangentially to the side wall of the reflux cylinder. It also includes a sliding member for driving the rotating frame to slide up and down.

[0023] As a further preference, the sliding member includes a chain disposed outside the reflux cylinder, a chute fixed to the chain, a movable button fixed to the outside of the transfer frame and disposed in the chute, and a drive shaft disposed below the reflux cylinder and used to drive the chain.

[0024] Advantages of the present invention:

[0025] (1) In the present invention, by providing an input mechanism and an aeration mechanism, the aeration process of sewage is divided into two parts. The first part is relatively intense and the second part is relatively gentle. Through the cooperation of the two mechanisms, the aeration process can be carried out efficiently, so that the dissolved oxygen content in each part of the water body is kept consistent, and at the same time, the dissolved oxygen content in the water can be simply controlled;

[0026] (2) In the present invention, by providing an aeration mechanism, the process of aeration treatment of the water body is controlled in many aspects. On the one hand, the structure itself is used to keep the dissolved oxygen content in the water body consistent. On the other hand, by continuously adjusting the position of the packing dynamically, the reaction rate in each part of the water body is kept the same, reducing the difference in the reaction process;

[0027] (3) In the present invention, the oxidant is put into the water through the purification mechanism, and at the same time, by using the fluidized bed mechanism that cooperates with itself, the packing can continuously exchange positions, and thus continuously maintain the high-efficiency catalytic effect on the water body. Brief Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a schematic diagram of the overall structure of a fluidized bed type Fenton treatment system.

[0030] Figure 2 It is a schematic diagram of the internal structure of the oxidation unit in a fluidized bed type Fenton treatment system.

[0031] Figure 3 It is a schematic diagram of the structure of the input mechanism.

[0032] Figure 4 It is a schematic diagram of the flow directions of water and air in the input mechanism.

[0033] Figure 5 It is a schematic diagram of the structure of the aeration mechanism.

[0034] Figure 6 It is a partial schematic diagram of the steady flow component.

[0035] Figure 7 It is a schematic diagram of the related structure of the static flow table.

[0036] Figure 8 It is a schematic diagram of the water and air flow directions in the aeration mechanism.

[0037] Figure 9 It is a schematic diagram of the structure of the added component.

[0038] Figure 10 It is a partial schematic diagram of the structure of the catalytic component.

[0039] Figure 11 It is a schematic diagram of the structure of the air exhalation part.

[0040] Figure 12 It is a schematic diagram of the water and air flow directions in the purification mechanism.

[0041] Figure 13 It is a schematic diagram of the related structure of the transfer rack. Specific implementation mode

[0042] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings.

[0043] Embodiment 1

[0044] As Figure 1 、 Figure 2 shown, a fluidized bed type Fenton treatment system includes a precipitation unit 01 for pre-treating sewage, an oxidation unit 02 arranged behind the precipitation unit 01 for performing Fenton oxidation reaction on the sewage, and a deep treatment unit 03 arranged behind the oxidation unit 02 for performing biological treatment on the sewage. The oxidation unit 02 includes:

[0045] Reaction tank 0;

[0046] Input mechanism 1, the input mechanism 1 is arranged at the bottom of the reaction tank 0 and is used for inputting sewage and air;

[0047] Aeration mechanism 2, the aeration mechanism 2 is arranged above the input mechanism 1 and is used for performing aeration reaction on the sewage. The aeration mechanism 2 includes a reflux component 21 for promoting the full contact of air and sewage and a steady flow component 22 arranged on the reflux component 21 and used for maintaining the stable upward flow of the beam;

[0048] Purification mechanism 3, the purification mechanism 3 is arranged above the aeration mechanism 2 and is used for performing Fenton treatment on the aerated sewage. The purification mechanism 3 includes an addition component 31 for adding medicine and a catalytic component 32 arranged in the middle of the addition component 31 and used for promoting the purification effect of the fluidized bed.

[0049] In this embodiment, by arranging the aeration mechanism 2 and the purification mechanism 3 to perform aeration and Fenton oxidation processes on the sewage in sequence, the participation degree of the fluidized bed structure in the two reactions is improved through the arrangement of the two structures, promoting the contact between the sewage and the filler, thereby improving the effects of the aeration reaction and the Fenton reaction.

[0050] Specifically, the sewage flows into the treatment system and enters the sedimentation unit 01, where the sedimentation of solid particles is carried out, and at the same time, the pretreatment before the Fenton reaction such as pH value adjustment is completed. Then it flows into the oxidation unit 02, and after being treated by Fenton in the oxidation unit 02, it flows into the advanced treatment unit 03, where the purification of the sewage is completed through processes such as biological treatment, and the effluent is discharged to complete the purification process; the detailed process of the Fenton reaction in the oxidation unit 02 is as follows: it enters the reaction tank 0 from the input mechanism 1, and the first contact between the sewage and oxygen occurs in the input mechanism 1. At this time, the violent reaction between the two is realized by using the water flow and the air flow for preliminary aeration. Then both the sewage and the air enter the aeration mechanism 2. At this time, the sewage and the air are separated, and by stabilizing the contact degree between the sewage and the gas, the dissolved oxygen content of the sewage is controlled, making the aerobic reaction during the aeration process tend to be stable, enabling the nitrifying bacteria carried on the filler to fully react, different from the incomplete reaction at high flow rates, and improving the reaction effect. Then the sewage enters the purification mechanism 3, and an oxidant is added in the purification mechanism 3. Through the stable water flow, the oxidant is fully diffused into the water body, and the catalytic component 32 cooperates with the fluidized bed filler to promote the progress of the reaction.

[0051] It should be noted that in the fluidized bed Fenton system in the sewage treatment industry, the filler participates in the reaction as a solid-phase catalyst. During the reaction process, the presence of the filler can increase the reaction rate, accelerate the reaction process, and at the same time promote the movement of the reaction products to the downstream pipeline. In the fluidized bed, fillers such as quartz sand are made into tiny porous spheres, and these spheres will be carried to the upper part of the bed layer due to the vibration of the bed layer and the flow of the air flow. When the air flow brings these quartz sand spheres to the top of the bed layer, they will be fully mixed with the liquid at the bottom to form a uniform reaction zone. However, the movement of the filler often requires the promotion of water flow or air flow, but a large water flow or air flow will lead to a shorter contact time between the gas and the water body, thereby reducing the reaction effect. In view of this, in this application, by arranging the aeration mechanism 2 and the purification mechanism 3, while the water flow is slowly flowing, the movement of the filler in the water body is promoted, thereby improving the reaction effect among the water body, the gas, and the filler.

[0052] It is worth mentioning that in this application, the aeration step and the Fenton reaction step are combined into one, and the two sets of devices that originally needed to be arranged sequentially can be integrated into one device, and the participation degree of the gas introduced during the aeration reaction is increased, enabling the gas to further promote the Fenton oxidation.

[0053] Furthermore, as Figure 3 、 Figure 4 shown, the input mechanism 1 includes a sewage inlet 11 disposed at the middle position of the bottom of the reaction tank 0, an air inlet pipe 12 that penetrates from the bottom of the reaction tank 0 and has a horizontal annular upper portion, a concave platform 13 disposed above the sewage inlet 11 and the air inlet pipe 12 and having a spherical middle portion, a cutting net 14 disposed below the concave platform 13, and a first filter net 15 disposed around the top of the concave platform 13.

[0054] In this embodiment, by providing the concave platform 13 and the cutting net 14, the sewage and air come into first contact after entering the reaction tank 0, and the contact between the air and the sewage can be made as intense as possible, promoting the rapid reaction between the air and the water body. At the same time, by utilizing the impact of the water flow and the gas, the bubbles are dispersed as much as possible and become a large number of small bubbles, thereby increasing the contact area between the gas and the water body. When the bubbles rise with the water flow, continuous reaction occurs.

[0055] Specifically, the sewage is introduced from the bottom of the reaction tank 0, and the water flow rushing out of the sewage inlet 11 hits the lower bottom surface of the concave platform 13, forming a reverse flow, causing the object to flow towards the surroundings. At the same time, gas is introduced into the reaction tank 0, forming bubbles that rise below the concave platform 13. Since the lower bottom surface of the concave platform 13 is an inclined surface, the gas converges towards the middle and is involved in the reverse flow of the water when moving, thus following the water flow. Under the impact of the water flow and the cutting of the cutting net 14, the bubbles are dispersed in large quantities and flow with the water flow to the periphery of the concave plate and continue to rise after passing through the first filter plate.

[0056] It should be noted that here, by using the concave platform 13, the control of the water flow direction is realized, and the bubbles can be in intense contact with the water flow in a short time, realizing the rapid diffusion between the two, enabling the bubbles to be distributed in large quantities in the water body and ensuring the uniformity of the contact degree between the water body and the gas. Compared with the existing technology of simply introducing oxygen into the water body, the structure here is simple while greatly improving the efficiency, and the bubbles can be almost evenly distributed in the water body and rise with the water body, continuously performing aeration.

[0057] Furthermore, as Figure 5 shown, the reflux assembly 21 includes a separation cylinder 211 disposed on the top of the concave platform 13, an aeration chamber 212 disposed in the middle of the separation cylinder 211 and having water inlets both in the lower and upper portions, a confluence plate 213 disposed below the aeration chamber 212, above the water inlet and having a water inlet in the middle portion, a partition plate 214 disposed outside the top of the aeration chamber 212, an impeller 215 rotatably connected to the middle water inlet of the confluence plate 213, and fillers are disposed in the aeration chamber 212.

[0058] In this embodiment, by providing the aeration chamber 212, the water body is made to flow back multiple times, and by taking advantage of the characteristic that gas rises, the water body and the gas can be separated, thereby realizing the control of the dissolved oxygen content in the water body and keeping the dissolved oxygen content consistent everywhere in the water.

[0059] Specifically, after the sewage passes through the first filter plate and continues to rise, at this time the object is at the outermost side inside the reaction tank 0. While the water body is rising, the bubbles also rise out of the water body and converge at the top under the blockage of the partition plate 214. At the same time, the water body continues to move upward until it reaches the height of the isolation cylinder 211, then passes through the isolation cylinder 211 and moves downward. After reaching the bottom, it passes through the confluence plate 213 and enters the aeration chamber 212, and the water flow drives the impeller 215 to rotate when passing through the aeration chamber 212.

[0060] It should be noted that here, three parts of space are formed by the isolation cylinder 211 and the aeration chamber 212, namely the outside of the isolation cylinder 211, the middle part between the isolation cylinder 211 and the aeration chamber 212, and the inside of the aeration chamber 212. As the water flow enters the outside of the isolation cylinder 211, the bubbles rise out of the water body and converge at the top of the isolation cylinder 211. With the continuous input of water flow, the gas also continuously accumulates at this place, increasing the air pressure at this place. Through this setting, each part of the water body flowing through the isolation cylinder 211 into the aeration chamber 212 has to contact the gas at this place, so that each part of the sewage contacts the air without difference, thereby keeping the dissolved oxygen content consistent everywhere in the water body.

[0061] It is worth mentioning that the space in the middle part between the isolation cylinder 211 and the aeration chamber 212 is small. By setting the water inlet on the confluence plate 213, the water flow has a certain pressure when entering the aeration chamber 212, and the pressure of the water flow is used to drive the rotation of the impeller 215, and at the same time, it can cooperate with the operation of the fluidized bed structure in the aeration chamber 212.

[0062] Further, as Figure 6 shown, the steady flow assembly 22 includes multiple groups of air ducts 221 arranged on the inner surface of the isolation chamber. The top of the air duct 221 is connected to the outside of the aeration chamber 212 and a pressure valve 222 is provided at the air inlet. A push plate 223 is vertically slidably connected inside the air duct 221, multiple groups of wedge-shaped sliders 224 are slidably connected to the periphery of the bottom of the aeration chamber 212, a hose 225 is provided between the air duct 221 and the wedge-shaped sliders 224 and the hose 225 connects the air duct 221 and the wedge-shaped sliders 224, and gas one-way valves are provided at both ends of the hose 225. The impeller 215 drives the push plate 223 and the wedge-shaped sliders 224 to move through the driving mode of a gear and a lead screw.

[0063] In this embodiment, by providing an air duct 221 and a wedge-shaped slider 224, the gas above the isolation cylinder 211 is introduced into the aeration chamber 212, and by coordinating the movement of the wedge-shaped slider 224, the movement of the packing in the aeration chamber 212 is realized, thereby improving the aeration reaction in the aeration chamber 212.

[0064] Specifically, the gas at the top of the isolation cylinder 211 continuously accumulates. When the pressure of the converging gas exceeds a certain level, the gas enters the air duct 221 through the pressure valve 222. The impeller 215 rotates continuously, and drives each group of wedge-shaped sliders 224 to move towards the middle through a gear meshing or worm and worm gear transmission method. At the same time, it drives the push plate 223 in the air duct 221 to move downward, pushing the gas in the air duct 221 into the hose 225. As the impeller 215 continues to rotate, the protruding wedge-shaped slider 224 and the push plate 223 return to their original positions. At this time, the gas in the hose 225 is squeezed out.

[0065] It should be noted that the impeller 215 is rotatably connected to the confluence plate 213. By providing two groups of incomplete bevel gears to drive the first lead screw to rotate, and using the threaded connection between the first lead screw and the wedge-shaped slider 224 to drive the back-and-forth movement of the wedge-shaped slider 224. At the same time, the end of the first lead screw drives the second lead screw to rotate through a worm and worm gear, and the second lead screw drives the push plate 223 to move up and down. At the same time, the push plate 223 is provided with air holes that can be opened and closed. When the push plate 223 moves up, the air holes are opened, and the gas enters from above the air duct 221 to below. When the push plate 223 moves down, the air holes are closed, and the gas is pushed into the hose 225 by the push plate 223.

[0066] It is worth mentioning that in the fluidized bed structure, the exchange of positions between the packings is promoted by the upward flow of the water body. This method is limited by the structure of the fluidized bed, resulting in the packings at the bottom corners not being able to flow well and form a position exchange, leading to deviations in the reaction progress at various places. In response to this, by providing multiple groups of wedge-shaped sliders 224, the packings at the surrounding corners are continuously pushed to the middle, enabling the packings to form a good position cycle. At the same time, when the wedge-shaped slider 224 retracts, the packings above will fall. Since the packings and the water body above have a higher aerobic reaction progress and a lower oxygen content compared to the water body at the bottom, when air is introduced at this time to supplement the oxygen content of this part of the water body, the reaction can proceed more fully and evenly. At the same time, by adjusting the parameters of the pressure valve 222, the timing of the gas entering the air duct 221 can be controlled, and to a certain extent, the dissolved oxygen in the water body can be controlled. The greater the air pressure, the more dissolved oxygen in the water, and vice versa.

[0067] Furthermore, as Figure 7 、 Figure 8As shown, the flow stabilizing component 22 also includes a still flow table 226 arranged in the middle of the aeration bin 212 and with a lower bottom surface arranged as an arc surface, a plurality of groups of water stop rings 227 arranged in horizontal positions above the still flow table 226 and with inner diameters decreasing successively from top to bottom, and a plurality of groups of blades 228 arranged on the peripheral side of the still flow table 226. The blades 228 are connected to the outer side of the still flow table 226 and are fixed by torsion springs while rotating axially along the circumference of the still flow table 226.

[0068] In this embodiment, by providing a still flow table 226 and blades 228 , the water flow is stabilized so that the water body rises smoothly to the top and then enters the purification mechanism 3 .

[0069] In detail, since the water carries a certain pressure when entering the aeration bin 212, the water flows upward from the middle, and the wedge-shaped slider 224 pushes the water. At this time, the water in the aeration bin 212 is in a relatively active state. This relatively active state is conducive to water exchange and promotes the reaction. However, it should be noted that the reaction will produce a certain amount of mud and dirt. The mud and dirt will enter the purification mechanism 3 above as the water flows upward, which will burden the purification mechanism 3. Therefore, the static flow platform 226, the blades 228 and the water stop ring 227 are arranged, and the water entering the aeration bin 212 rushes toward the static flow. The platform 226 allows water to flow downward around it to promote water exchange. When the wedge-shaped slider 224 pushes the water to move, the opposite water flow will surge up. The setting of the blade 228 allows the water to smoothly and obliquely flow out from the gap, thereby keeping a relatively stable water flow rising state above the static flow platform 226 and the blade 228. After the water flow continues to rise, it passes through multiple groups of water stop rings 227. Each group of water stop rings 227 can be used as a water outlet. The water stop rings 227 become smaller one by one, that is, the pressure of the water body when it is discharged becomes larger. This part of the pressure can effectively alleviate the turbulence in the water body and keep the water body rising steadily.

[0070] It should be noted that, through the arrangement here, the water body above the static flow table 226 maintains a relatively stable and slow upward trend. At this time, the mud and dirt carried in the water body can settle, and will not enter the purification mechanism 3 in large quantities with the water body, increasing the burden of the purification mechanism 3.

[0071] It is worth mentioning that, for the treatment of the sludge here, a sludge scraping and filtering device can be set up. These devices are common existing technologies and can be flexibly set up by technical personnel in this field according to needs, and will not be elaborated here.

[0072] Further, if Figure 9As shown, the addition component 31 includes a partition bin 311 disposed above the aeration bin 212 and on the outer side inside the reaction tank 0. The partition bin 311 is provided with a plurality of chambers, the bottom of each chamber communicates with the aeration bin 212, and the upper part is provided with a water outlet. It further includes an infusion member 312 disposed inside each chamber of the partition bin 311.

[0073] In this embodiment, by providing the partition bin 311, the area is divided into a plurality of small spaces, and the oxidant is input by the infusion member 312 in the small spaces.

[0074] Specifically, in order to enable the oxidant added to the water body to fully diffuse into the entire water body, compared with directly adding it to the water body, adding it separately in small spaces can achieve a better diffusion effect. Here, through the setting of the isolation bin, a plurality of small spaces are formed, the oxidant is added separately into the small spaces, and as the water body flows upward, it converges again after flowing out of the chambers of the partition bin 311, accelerating the diffusion of the oxidant.

[0075] Further, as Figure 9 shown, the infusion member 312 includes a liquid inlet pipe 313 for introducing the oxidant into each chamber of the partition chamber. The lower end of the liquid inlet pipe 313 is connected to a discharge pipe 314, and the discharge pipe 314 is hinged to the liquid inlet pipe 313. Both sides of the discharge pipe 314 are vertical pipes 3141 connected to the liquid inlet pipe 313, and a plurality of horizontal pipes 3142 with spray heads at the bottom are arranged in the middle. The horizontal pipes 3142 are arranged in an inclined straight line with each other;

[0076] It further includes a driving unit 315 for driving the discharge pipe 314 to swing up and down along the hinge axis. The driving unit 315 includes a flap 3151 disposed below the discharge pipe 314, a cam 3152 disposed near the flap 3151, and a fan blade 3153 fixedly connected to the cam 3152 and disposed at the water inlet of the chamber.

[0077] In this embodiment, by providing the liquid inlet pipe 313, the oxidant is added into the chambers of the partition bin 311, enabling the oxidant to be evenly distributed in the partition bin 311.

[0078] Specifically, the sewage flows into the chambers of the partition bin 311, driving the fan blade 3153 to rotate, driving the entire liquid inlet pipe 313 to swing through the cam 3152. At the same time, the horizontal pipes 3142 in the liquid inlet pipe 313 release the oxidant into the water body, using the swing of the liquid inlet pipe 313 to play a stirring role and accelerating the diffusion of the oxidant.

[0079] It should be noted that regarding the setting of the position of the horizontal pipe 3142 on the liquid inlet pipe 313, compared with directly releasing the oxidant into the water quality by using a spray head, by setting the mutual positions of the horizontal pipes 3142 as an inclined straight line and making the distance between the horizontal pipes 3142 relatively moderate, that is, just not affecting the upward flow of the water body is the best. The horizontal pipe 3142 will neither hinder the overall flow rate of the water body nor cause a certain degree of turning during the upward flow of the water flow, and small-scale impacts will occur among the water flows, thereby promoting the diffusion of the oxidant.

[0080] It is worth mentioning that the shadows projected by the cross bars onto the horizontal plane should be connected into a whole. At this time, the oxidant released by the horizontal pipe 3142 is equivalent to being spread horizontally on the water surface, greatly increasing the uniformity of the oxidant injection.

[0081] Furthermore, as Figure 10 , Figure 11 , Figure 12 shown, the catalytic assembly 32 includes a reflux cylinder 321 disposed in the middle of the separation bin 311 and having a water tank at the lower end, a second filter plate 322 disposed at the upper end outlet of the reflux cylinder 321, and an air-exhaling member 323 disposed at the lower part of the reflux cylinder 321;

[0082] The air-exhaling member 323 includes an air cavity 3231 disposed at the bottom of the reflux cylinder 321 and having an opening at the upper part, a hinge 3232 disposed at the top opening of the air cavity 3231 for controlling the opening and closing of the air cavity 3231, a piston 3233 slidably connected inside the air cavity 3231 and controlled by a telescopic cylinder, a through pipe 3234 disposed on the side wall of the air cavity 3231 and communicating the air cavity 3231 with the top of the aeration bin 212, and a gas check valve is disposed inside the through pipe 3234.

[0083] In this embodiment, by setting the reflux cylinder 321 and the air-exhaling member 323, the fluidized bed is used to catalyze the Fenton treatment process. After the sewage flows into the reflux cylinder 321, it contacts the packing, and the progress of the oxidation reaction is accelerated under the catalysis of the packing. Bubbles are released through the air-exhaling member 323 to promote the flow of the packing, and at the same time, the oxygen content in the water body is replenished.

[0084] Specifically, the sewage after adding the oxidant flows into the reflux cylinder 321. After the reaction in the reflux cylinder 321, it flows out through the second filter plate 322 to complete the Fenton treatment and can then flow out of the reaction tank 0. Here, fillers are provided in the reflux cylinder 321. Water flows into the reflux cylinder 321 from the periphery at the bottom of the reflux cylinder 321 and gradually rises. At this time, it will cause the fillers to gather towards the middle of the reflux cylinder 321, resulting in a smaller density of the fillers around the periphery. As the water body rises, the air-exhaling member 323 operates. The air chamber 3231 uses the movement of the piston 3233 to extract the gas located at the top of the aeration chamber 212. After the air chamber 3231 is filled with gas, the hinge 3232 opens and cooperates with the piston 3233 to exhale the gas in the air chamber 3231. This part of the gas forms a large air bubble. Then the hinge 3232 closes again, and the piston 3233 extracts air again. At this time, the large air bubble rises, and the rise of the large air bubble can effectively drive the movement of the fillers located in the middle position of the water. At the same time, blocked by the fillers, the large air bubble will gradually turn into small air bubbles, which can supplement the oxygen content in the water body.

[0085] It should be noted that in the aeration link, after the gas is ejected through the wedge-shaped slider 224, it moves upward, and the components converge at the top of the aeration chamber 212. This part of the gas is drawn into the air chamber 3231 through the air-exhaling member 323 and then ejected. After the air bubbles escape from the water body, they are discharged from the reaction tank 0 through the exhaust pipe at the top of the reaction tank 0.

[0086] It is worth mentioning that regarding the promotion of the fillers, if small air bubbles are used, the buoyancy of the small air bubbles is not large enough. When a large amount of fillers accumulate, the small air bubbles cannot achieve an obvious promotion effect, and the small air bubbles are prone to escape from the periphery following the water flow, resulting in a poor promotion effect on the fillers. However, when using large air bubbles, the promotion effect on the fillers is better.

[0087] Furthermore, as Figure 13 shown, the catalytic assembly 32 further includes a rotating frame 324 slidably connected to the side wall of the reflux cylinder 321 and extending inwardly into the reflux cylinder 321. A water pump is provided on the outer side of the rotating frame 324 and is connected to the inner spray pipe 325, and the spray pipe 325 is oriented obliquely tangentially to the side wall of the reflux cylinder 321. It also includes a sliding member 326 for driving the up and down sliding of the rotating frame 324.

[0088] In this embodiment, by providing the rotating frame 324 and the spray pipe 325, by extracting and ejecting the external sewage, the rotational driving effect on the water body is realized, causing the water body located in the reflux cylinder 321 to rotate.

[0089] Specifically, the turnover rack 324 is slidably connected to the return cylinder 321 and continuously slides up and down under the drive of the sliding member 326. At the same time, the turnover rack 324 extracts the water sprayed from the inner side of the sewage tank located outside. Under the joint action of multiple oblique water flows, the water body in the return flow cylinder rotates to a certain extent, thereby driving the filler in the middle to rotate. By using centrifugal force and cooperating with bubbles, the filler can move more fully.

[0090] It should be noted that since the filler itself is located in the middle under the influence of the rising water flow, the spraying direction of the spray pipe 325 here should be towards the edge of the filler position. That is, regarding the position where the filler is located as a circle, the spraying trajectory of the spray pipe 325 should be tangential to this circle, so as to drive the filler to rotate. The sprayed water flow can also appropriately drive the edge filler to move. In cooperation with the up and down sliding of the turnover rack 324, the overall position exchange of the filler is promoted.

[0091] Further, as Figure 13 shown, the sliding member 326 includes a chain 3261 arranged outside the return cylinder 321, a chute 3262 fixed on the chain 3261, a movable button fixed outside the turnover rack 324 arranged in the chute 3262, and a drive shaft 3263 arranged below the return cylinder 321 and used to drive the chain 3261.

[0092] In this embodiment, the drive for the up and down sliding of the turnover rack 324 can be realized by arranging the chain 3261.

[0093] Specifically, the water flow drives the drive shaft 3263 to rotate. The rotation of the drive shaft 3263 drives the chain 3261 to rotate. The rotation of the chain 3261 drives the chute 3262 to move up and down, causing the turnover rack 324 to slide up and down.

[0094] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "front and back", "left and right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the invention.

[0095] Of course, in this technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of one component can be one, while in other embodiments, the number of this component can be multiple. The term "one" cannot be understood as a limitation on the number.

[0096] As described above, it is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art in the technical field of the present invention under the technical disclosure of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A fluidized bed Fenton treatment system, characterized in that: The invention comprises a sedimentation unit (01) for pre-treating sewage, an oxidation unit (02) arranged behind the sedimentation unit (01) for performing a Fenton oxidation reaction on the sewage, and a deep treatment unit (03) arranged behind the oxidation unit (02) for performing a biological treatment on the sewage, wherein the oxidation unit (02) comprises: Reactor (0); An input mechanism (1), the input mechanism (1) being arranged at the bottom of the reaction tank (0) and being used to input sewage and air; an aeration mechanism (2), the aeration mechanism (2) being arranged above the input mechanism (1) and used for aerating the sewage; the aeration mechanism (2) comprising a reflux component (21) for promoting full contact between air and sewage, and a flow stabilization component (22) arranged on the reflux component (21) and used for maintaining a stable upward flow of the beam; A purification mechanism (3) is arranged above the aeration mechanism (2) and is used to perform Fenton treatment on the aerated sewage. The purification mechanism (3) comprises an addition component (31) for adding a reagent and a catalytic component (32) arranged in the middle of the addition component (31) and used to promote the fluidized bed purification effect.

2. A fluidized bed Fenton treatment system according to claim 1, characterized in that: The input mechanism (1) comprises a sewage input port (11) arranged at a middle position of the bottom of the reaction tank (0), an air input pipe (12) entering from the bottom of the reaction tank (0) and having an upper portion arranged in a horizontal ring shape, a concave platform (13) arranged above the sewage input port (11) and the air input pipe (12) and having a spherical surface in the middle, a cutting net (14) arranged at the bottom of the concave platform (13), and a first filter net (15) arranged around the top of the concave platform (13).

3. A fluidized bed Fenton treatment system according to claim 1, characterized in that: The reflux assembly (21) comprises an isolation cylinder (211) arranged at the top of the concave platform (13), an aeration bin (212) arranged in the middle of the isolation cylinder (211) and provided with water inlets at the bottom and the top, a confluence plate (213) arranged at the bottom of the aeration bin (212), above the water inlet and provided with a water inlet in the middle, a partition plate (214) arranged at the outside of the top of the aeration bin (212), an impeller (215) rotatably connected to the water inlet in the middle of the confluence plate (213), and fillers are arranged in the aeration bin (212).

4. A fluidized bed Fenton treatment system according to claim 1, characterized in that: The flow stabilizing component (22) comprises a plurality of groups of air guide pipes (221) arranged on the inner surface of the isolation chamber, the top of the air guide pipe (221) being connected to the outside of the aeration chamber (212) and a pressure valve (222) being arranged at the air inlet, a push plate (223) vertically slidably connected to the inside of the air guide pipe (221), a plurality of groups of wedge-shaped sliders (224) slidably connected to the periphery of the bottom of the aeration chamber (212), a hose (225) arranged between the air guide pipe (221) and the wedge-shaped slider (224), the hose (225) being connected to the air guide pipe (221) and the wedge-shaped slider (224), and gas check valves being arranged at both ends of the hose (225), and the impeller (215) driving the push plate (223) and the wedge-shaped slider (224) to move by means of a gear and a screw rod.

5. A fluidized bed Fenton treatment system according to claim 4, characterized in that: The flow stabilizing component (22) further comprises a static flow platform (226) arranged in the middle of the aeration bin (212) and having a lower bottom surface arranged as an arc surface, a plurality of groups of water stop rings (227) arranged in horizontal positions above the static flow platform (226) and having inner diameters decreasing from top to bottom, and a plurality of groups of blades (228) arranged on the circumferential side of the static flow platform (226), wherein the blades (228) are connected to the outer side of the static flow platform (226) and are axially rotatable along the circumference of the static flow platform (226) and are fixed by torsion springs.

6. A fluidized bed Fenton treatment system according to claim 1, characterized in that: The adding component (31) comprises a partition chamber (311) arranged above the aeration chamber (212) and located on the outside of the reaction tank (0), wherein a plurality of chambers are arranged in the partition chamber (311), and the bottom of each chamber is connected to the aeration chamber (212), and a water outlet is arranged at the top, and further comprises an infusion piece (312) arranged inside each chamber of the partition chamber (311).

7. A fluidized bed Fenton treatment system according to claim 6, characterized in that: The infusion member (312) comprises a liquid inlet pipe (313) for introducing an oxidant into each chamber of the partition chamber, a discharge pipe (314) is connected to the lower end of the liquid inlet pipe (313), and the discharge pipe (314) and the liquid inlet pipe (313) are hingedly connected, vertical pipes (3141) on both sides of the discharge pipe (314) are connected to the liquid inlet pipe (313), and a plurality of groups of horizontal pipes (3142) with nozzles at the bottom are arranged in the middle, and the horizontal pipes (3142) are arranged in an inclined straight line with each other; It also includes a driving unit (315) for driving the discharge pipe (314) to swing up and down along the hinge axis, the driving unit (315) comprising a paddle (3151) arranged below the discharge pipe (314), a cam (3152) arranged near the paddle (3151), and a fan blade (3153) fixedly connected to the cam (3152) and arranged at the water inlet of the chamber.

8. The fluidized bed Fenton treatment system according to claim 1, characterized in that: The catalytic assembly (32) comprises a reflux cylinder (321) arranged in the middle of the separation chamber (311) and having a water tank at the lower end, a second filter plate (322) arranged at the upper outlet of the reflux cylinder (321), and an air discharge piece (323) arranged at the lower part of the reflux cylinder (321); and fillers are arranged in the reflux cylinder (321); The air discharge member (323) comprises an air cavity (3231) arranged at the bottom of the reflux cylinder (321) and having an opening at the top, a hinge (3232) arranged at the top opening of the air cavity (3231) and used to control the opening and closing of the air cavity (3231), a piston (3233) slidably connected inside the air cavity (3231) and controlled by a telescopic cylinder, a through pipe (3234) arranged on the side wall of the air cavity (3231) and connecting the air cavity (3231) with the top of the aeration bin (212), and a gas one-way valve arranged inside the through pipe (3234).

9. A fluidized bed Fenton treatment system according to claim 8, characterized in that: The catalytic assembly (32) further comprises a flow rack (324) slidably connected to the side wall of the reflux cylinder (321) and extending into the reflux cylinder (321). A nozzle (325) connected to the inside of the water pump is arranged on the outside of the flow rack (324), and the nozzle (325) is oriented obliquely toward the side wall of the reflux cylinder (321). The flow rack (324) further comprises a sliding member (326) for driving the flow rack (324) to slide up and down.

10. A fluidized bed Fenton treatment system according to claim 9, characterized in that: The sliding member (326) comprises a chain (3261) arranged outside the reflux cylinder (321), a slide groove (3262) fixed on the chain (3261), a movable button fixed to the outside of the flow rack (324) arranged in the slide groove (3262), and a driving shaft (3263) arranged below the reflux cylinder (321) and used to drive the chain (3261).

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