Fenton treatment device and treatment method

Abstract

The invention discloses a Fenton treatment device and a treatment method, belonging to the technical field of water treatment, a Fenton treatment device, comprising a housing, a hydrodynamic proportional dosing pump, and a first pH regulating tank, a ferrous dosing tank, a hydrogen peroxide dosing tank, a Fenton reaction tank, a second pH regulating tank, a PAC dosing tank, a PAM dosing tank, and a coagulation sedimentation tank arranged inside the housing, the left side of the housing is sequentially provided with a first pH regulating tank, a ferrous dosing tank, and a hydrogen peroxide dosing tank from front to back, the first pH regulating tank and the ferrous dosing tank are connected through a first pipeline, the ferrous dosing tank and the hydrogen peroxide dosing tank are connected through a second pipeline, and the first pipeline and the second pipeline are both provided with a hydrodynamic proportional dosing pump. The Fenton treatment device and the treatment method of the invention automatically add medicine according to the influent flow rate, reduce manual intervention, and the effluent meets the standard.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to a Fenton treatment device and a treatment method. Background Art

[0002] The Fenton reaction is an inorganic chemical reaction in which hydrogen peroxide reacts with divalent iron ions Fe 2+ The mixed solution can oxidize many known organic compounds such as carboxylic acids, alcohols, and esters into inorganic states. The reaction has a high ability to remove refractory organic pollutants and is widely used in the treatment of printing and dyeing wastewater, oily wastewater, phenolic wastewater, coking wastewater, nitrobenzene-containing wastewater, diphenylamine wastewater, and other wastewater.

[0003] The Fenton reaction requires not only good control of the pH value, but also the amount of ferrous iron and hydrogen peroxide added. Therefore, the traditional Fenton treatment process requires an excellent technical manager to adjust the dosage of the drug at any time according to the specific situation to ensure that the effluent meets the standards and the treatment efficiency. Similarly, the coagulation and sedimentation treatment requires not only good control of the pH value, but also full mixing of the wastewater and the drug to ensure a good sedimentation and coagulation effect. Summary of the invention

[0004] The purpose of the present invention is to provide a Fenton treatment device and a treatment method, which can automatically add chemicals according to the inlet flow rate, reduce manual intervention, and ensure that the effluent meets the standards.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The present invention provides a Fenton treatment device, comprising a box, a hydrodynamic proportional dosing pump, and a first pH adjustment tank, a ferrous dosing tank, a hydrogen peroxide dosing tank, a Fenton reaction tank, a second pH adjustment tank, a PAC dosing tank, a PAM dosing tank, and a coagulation sedimentation tank arranged inside the box. The first pH adjustment tank, the ferrous dosing tank, and the hydrogen peroxide dosing tank are arranged in sequence on the left side of the box from front to back. The first pH adjustment tank and the ferrous dosing tank are connected through a first pipeline, and the ferrous dosing tank and the hydrogen peroxide dosing tank are connected through a second pipeline. The first pipeline and the second pipeline are both provided with a hydrodynamic proportional dosing pump. A dosing pump, a Fenton reaction tank is located on the right side of the hydrogen peroxide dosing tank and is connected to the hydrogen peroxide dosing tank. A second pH adjusting tank, a PAC dosing tank, and a PAM dosing tank are arranged in sequence from front to back in the box on the right side of the Fenton reaction tank. The second pH adjusting tank is connected to the Fenton reaction tank. A coagulation sedimentation tank is arranged on the right side of the box, and the coagulation sedimentation tank is connected to the PAM dosing tank. The hydrodynamic proportional dosing pump between the first pH adjusting tank and the ferrous dosing tank adds ferrous solution to the ferrous dosing tank, and the hydrodynamic proportional dosing pump between the ferrous dosing tank and the hydrogen peroxide dosing tank adds hydrogen peroxide to the hydrogen peroxide dosing tank.

[0007] Preferably, the second pH adjusting tank, the PAC dosing tank, and the PAM dosing tank are all provided with a stirring assembly and an air distribution assembly, one end of the air distribution assembly is located below the stirring assembly, and the other end of the air distribution assembly passes through the stirring device and extends to the outside of the box, a hair dryer is fixed on one side of the top of the box, the hair dryer is connected to an air supply pipe through a hose, the air supply pipe is connected to one end of each air distribution assembly extending out of the box, a motor is fixed on the other side of the top of the box, the motor drives the stirring assembly of the second pH adjusting tank to rotate through a transmission assembly, the stirring assembly of the second pH adjusting tank and the stirring assembly of the PAC dosing tank are transmission-connected through the transmission assembly, the stirring assembly of the PAC dosing tank and the stirring assembly of the PAM dosing tank are transmission-connected through the transmission assembly, a spring is connected between the air supply pipe and the top wall of the box, a pushing member is fixed on the top of the box, the pushing member is located below the air supply pipe, and is driven by the stirring assembly of the PAC dosing tank.

[0008] Preferably, the stirring assembly includes a first bearing seat, a hollow stirring shaft, and stirring blades. The first bearing seat is fixed to the top of the box body, and the bottom end of the hollow stirring shaft passes through the first bearing seat and the top wall of the box body, extending to the interior of the box body and fixed with multiple stirring blades.

[0009] Preferably, the air distribution assembly includes an air inlet pipe and an arc-shaped air distribution plate, the bottom end of the air inlet pipe passes through a hollow stirring shaft and is fixedly connected to the arc-shaped air distribution plate, the top end of the air inlet pipe is connected to the air supply pipe, the center of curvature of the arc-shaped air distribution plate is located on the axis of the air inlet pipe and above the arc-shaped air distribution plate, an air cavity is provided inside the arc-shaped air distribution plate, and a plurality of first air distribution holes connected to the air cavity are spaced apart from front to back on both left and right ends of the arc-shaped air distribution plate, a plurality of second air distribution holes connected to the air cavity are provided on the top wall of the arc-shaped air distribution plate, and a plurality of third air distribution holes connected to the air cavity are provided on the bottom wall of the arc-shaped air distribution plate.

[0010] Preferably, the second air distribution holes and the third air distribution holes are both arranged to be inclined toward the air inlet pipe, and the second air distribution holes and the third air distribution holes are arranged to be staggered.

[0011] Preferably, the pusher includes a first bevel gear, a second bevel gear, a rotating shaft, a second bearing seat, and a cam. The first bevel gear is fixed to the upper part of the hollow stirring shaft of the stirring assembly of the PAC dosing tank, the second bearing seat is fixed to the top of the box body, one end of the rotating shaft passes through the second bearing seat to be fixed with the second bevel gear, the second bevel gear is meshed with the first bevel gear, and the other end of the rotating shaft is fixed with a cam.

[0012] Preferably, the communication port between the second pH adjustment tank and the PAC dosing tank is located at the bottom, and the communication port between the PAC dosing tank and the PAM dosing tank is located at the top.

[0013] Preferably, it also includes two industrial pH meters, a metering pump, a dosing device, and a control panel. The detection ends of the two industrial pH meters extend into the Fenton reaction tank and the coagulation sedimentation tank respectively. The first pH adjusting tank has one liquid inlet pipe, and the second pH adjusting tank has two liquid inlet pipes. The liquid inlet pipes of the first pH adjusting tank and the second pH adjusting tank are both provided with a metering pump. The PAC dosing tank and the PAM dosing tank are both provided with a dosing device. The industrial pH meter and the dosing device are both electrically connected to the control panel, and the control panel is electrically connected to the metering pump.

[0014] Preferably, it also includes a mud level meter and a mud discharge pump, the detection end of the mud level meter extends into the coagulation sedimentation tank, the mud level meter is electrically connected to the control panel, and the control panel is electrically connected to the mud discharge pump.

[0015] The present invention also provides a Fenton treatment method, which comprises the following steps: a small test is first performed to obtain the best dosage ratio of the wastewater, the dosage of PAC and PAM is set, an acid solution is added into a first pH adjustment tank, wastewater is sent into the first pH adjustment tank to be mixed with the acid solution to adjust the pH of the wastewater, the effluent from the first pH adjustment tank flows through a first pipeline, when the water flows through the first pipeline, a hydrodynamic proportional dosing pump on the first pipeline adds a ferrous solution in proportion according to the influent flow rate, and the ferrous solution enters the ferrous dosing tank together with the wastewater, the effluent from the ferrous dosing tank flows through a second pipeline, when the water flows through a second pipeline, a hydrodynamic proportional dosing pump on the second pipeline adds hydrogen peroxide in proportion according to the influent flow rate, and the effluent enters the hydrogen peroxide dosing tank together with the wastewater, and the effluent from the hydrogen peroxide dosing tank enters the Fenton reaction tank Fenton reaction is carried out, and the industrial pH meter of the Fenton reaction tank monitors the pH value of the wastewater therein online. The dosage of the metering pump of the first pH adjustment tank is adjusted according to the pH value. The wastewater after the Fenton reaction enters the second pH adjustment tank, and alkali solution is added to the second pH adjustment tank. The effluent of the Fenton reaction tank enters the second pH adjustment tank and is mixed with the alkali solution to adjust the pH of the wastewater. The effluent of the second pH adjustment tank enters the PAC dosing tank, and PAC is quantitatively added through the dosing device. The effluent of the PAC dosing tank enters the PAM dosing tank, and PAM is quantitatively added through the dosing device. The effluent of the PAM dosing tank enters the coagulation sedimentation tank for sedimentation treatment. The mud level is monitored by the mud level meter. When the mud level reaches the preset position, the mud is automatically discharged through the mud discharge pump, and the upper clear water after sedimentation treatment is discharged.

[0016] The beneficial effects of the present invention are:

[0017] 1. Through Fenton reaction + coagulation and sedimentation, the effluent meets the standards. A hydrodynamic proportional dosing pump is used, and there is no need to manually control the amount of ferrous solution and hydrogen peroxide added, thus reducing labor costs.

[0018] 2. The Fenton reaction and the coagulation reaction are combined, and each pool is uniformly arranged in a box, which is not only compact in structure, but also easy to prefabricate and install, without the need for on-site wet processing.

[0019] 3. The water flow is disturbed by air flow and mechanical stirring is used to disturb the water flow to ensure the mixing efficiency of the reagent and wastewater, making the mixing more uniform and thorough.

[0020] 4. Through one driving source, the three pools can be stirred synchronously at the same time, and the intermittent up and down movement of the three air distribution components can be realized synchronously. Combined with the air supply of the air distribution components, it can achieve a good mixing treatment of the reagent and the wastewater.

[0021] 5. Blow air obliquely upward from the left and right sides through the first air distribution hole, blow air upward through the second air distribution hole, and blow air downward through the third air distribution hole, distribute air from multiple directions and positions, so that the gas is blown out more comprehensively, thereby making the water flow disturbance more comprehensive and improving the mixing degree of wastewater and chemicals.

[0022] 6. The second air distribution holes arranged obliquely blow air from the periphery to the center, and the airflow is concentrated at the air inlet pipe; combined with the third air distribution holes arranged obliquely, air blows from the center to the periphery, so that the airflow is dispersed from the bottom, and combined with the left and right upward inclined airflow, a good airflow disturbing water flow effect is formed.

[0023] 7. The water flow from the second pH adjustment tank to the PAM dosing tank forms a baffle to further improve the mixing of the reagent and wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the top structure of the present invention.

[0025] Figure 2 It is a partial right view structural schematic diagram of the present invention.

[0026] Figure 3 It is a partial cross-sectional structural schematic diagram of the air distribution assembly and the hollow stirring shaft of the present invention.

[0027] Figure 4 It is a schematic diagram of the arrangement of the first air distribution holes of the present invention.

[0028] Figure 5 It is a right side structural schematic diagram of the cam of the present invention.

[0029] The markings in the attached drawings are: 1-tank, 2-hydrodynamic proportional dosing pump, 3-first pH adjustment tank, 4-ferrous dosing tank, 5-hydrogen peroxide dosing tank, 6-Fenton reaction tank, 7-second pH adjustment tank, 8-PAC dosing tank, 9-PAM dosing tank, 10-coagulation sedimentation tank, 11-first pipeline, 12-second pipeline, 13-stirring assembly, 14-air distribution assembly, 15-blower, 16-hose, 17-air supply pipe, 18-motor, 19-transmission assembly, 20-spring, 21-pushing member , 131-first bearing seat, 132-hollow stirring shaft, 133-stirring blades, 141-inlet pipe, 142-arc-shaped air distribution plate, 143-air cavity, 144-first air distribution hole, 145-second air distribution hole, 146-third air distribution hole, 211-first bevel gear, 212-second bevel gear, 213-rotating shaft, 214-second bearing seat, 215-cam, 22-industrial pH meter, 23-metering pump, 24-doser, 25-control panel, 26-mud level meter, 27-mud discharge pump. DETAILED DESCRIPTION

[0030] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0031] Contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] like Figures 1 to 5As shown, a Fenton treatment device provided in this embodiment includes a housing 1, a hydrodynamic proportional dosing pump 2, and a first pH regulating tank 3, a ferrous dosing tank 4, a hydrogen peroxide dosing tank 5, a Fenton reaction tank 6, a second pH regulating tank 7, a PAC dosing tank 8, a PAM dosing tank 9, and a coagulation sedimentation tank 10 arranged inside the housing 1. The first pH regulating tank 3, the ferrous dosing tank 4, and the hydrogen peroxide dosing tank 5 are arranged on the left side of the housing 1 from front to back. The first pH regulating tank 3 and the ferrous dosing tank 4 are connected by a first pipe 11, and the ferrous dosing tank 4 and the hydrogen peroxide dosing tank 5 are connected by a second pipe 12. Water is provided on the first pipe 11 and the second pipe 12. Power proportional dosing pump 2, Fenton reaction tank 6 is located on the right side of hydrogen peroxide dosing tank 5, and is connected to hydrogen peroxide dosing tank 5. The second pH regulating tank 7, PAC dosing tank 8, and PAM dosing tank 9 are arranged in sequence from front to back in the box 1 on the right side of Fenton reaction tank 6. The second pH regulating tank 7 is connected to Fenton reaction tank 6. A coagulation sedimentation tank 10 is arranged on the right side of the box 1. The coagulation sedimentation tank 10 is connected to the PAM dosing tank 9. The hydrodynamic proportional dosing pump 2 between the first pH regulating tank 3 and the ferrous dosing tank 4 is used to add ferrous solution to the ferrous dosing tank 4, and the hydrodynamic proportional dosing pump 2 between the ferrous dosing tank 4 and the hydrogen peroxide dosing tank 5 is used to add hydrogen peroxide to the hydrogen peroxide dosing tank 5. This embodiment adopts the hydrodynamic proportional dosing pump 2 of Hengyuanda. Through the setting of the hydrodynamic proportional dosing pump 2, the hydrodynamic proportional dosing pump 2 is directly installed on the water supply pipeline, and uses water flow as the power for operation. Utilizing the wind tunnel principle of dynamics, the internal structure is stretched outward at 12.5 degrees, powered by water pressure, and pumped out at 8 bar to supply the liquid medicine to the main machine at high speed to complete the dosing. According to the different pressures generated by entry and dosing, a pressure difference is formed to make the water spirally move, thereby achieving sufficient and uniform mixing. And the dosing is not affected by the size of the water flow, so as to achieve stable dosing. No electricity is required, and water pressure is used as the working power. The Fenton reaction and the coagulation reaction are combined, and each pool is uniformly arranged in the housing 1, which is not only compact in structure, but also convenient for prefabrication and installation, and no on-site wet processing is required. The pH value is first adjusted along the water inlet direction to obtain the best Fenton reaction effect, and then ferrous solution and hydrogen peroxide are added in sequence, and preliminary mixing is performed during the dosing process, and then the Fenton reaction tank 6 is entered to carry out the Fenton reaction. The Fenton reaction tank 6 and the coagulation sedimentation tank 10 of this embodiment are both provided with agitators to improve the reaction efficiency. Since the pH value of the Fenton reaction tank 6 is between 2-4, and the coagulation sedimentation discharge requirement is 6-9, it is necessary to adjust the pH of the wastewater after the Fenton reaction. The alkali solution added in this embodiment is liquid alkali to reduce the amount of sludge. Then PAC and PAM are added in sequence, and enter the coagulation sedimentation tank 10 for coagulation sedimentation treatment. Through Fenton reaction + coagulation sedimentation, the effluent meets the standard. The hydrodynamic proportional dosing pump 2 is used, and there is no need to manually control the amount of ferrous solution and hydrogen peroxide added, thereby reducing labor costs.

[0033] Among them, the second pH adjustment tank 7, the PAC dosing tank 8, and the PAM dosing tank 9 are all provided with a stirring assembly 13 and an air distribution assembly 14, one end of the air distribution assembly 14 is located below the stirring assembly 13, and the other end of the air distribution assembly 14 extends to the outside of the box body 1 through the stirring device. A hair dryer 15 is fixed on one side of the top of the box body 1, and the hair dryer 15 is connected to an air supply pipe 17 through a hose 16. The air supply pipe 17 is connected to one end of each air distribution assembly 14 extending outside the box body 1. A motor 18 is fixed on the other side of the top of the box body 1, and the motor 18 is connected to the outside of the box body 1 through a transmission The driving assembly 19 drives the stirring assembly 13 of the second pH regulating tank 7 to rotate, the stirring assembly 13 of the second pH regulating tank 7 and the stirring assembly 13 of the PAC dosing tank 8 are connected by the transmission assembly 19, the stirring assembly 13 of the PAC dosing tank 8 and the stirring assembly 13 of the PAM dosing tank 9 are connected by the transmission assembly 19, a spring 20 is connected between the air supply pipe 17 and the top wall of the box body 1, a pusher 21 is fixed on the top of the box body 1, the pusher 21 is located below the air supply pipe 17, and is driven by the stirring assembly 13 of the PAC dosing tank 8. In the coagulation and sedimentation reaction process, rapid stirring is to fully mix the agent and the wastewater, medium-speed stirring is to stabilize the flocculation of the agent without destroying its molecular structure (because the initially formed floccules are easily broken up), and slow stirring is to prevent the finally formed floccules from settling in this liquid tank, so that the entire flocculation mechanism can achieve the best effect. The stirring speed of the stirring assembly 13 of the present application is slow stirring, and the PAC and PAM tanks are set up in combination with the control of stirring intensity to achieve twice the result with half the effort. The stirring assembly 13 mixes PAC and wastewater, and PAM and wastewater respectively, and finally enters the coagulation sedimentation tank 10 for coagulation and sedimentation treatment, with good effect.

[0034] Through the setting of the transmission component 19, one motor 18 can synchronously drive the three stirring components 13 to perform stirring operations. And because the stirring component 13 is not directly driven by the motor 18 to rotate, the air distribution component 14 is provided with a simple installation, so that the air inlet pipe 141 of the air distribution component 14 can directly pass through the stirring component 13 without the need for complex settings. When the stirring component 13 performs a slow stirring operation, the hair dryer 15 blows air, and the air enters the air supply pipe 17 through the hose 16. The air supply pipe 17 supplies air to the three air distribution components 14 respectively, and the three air distribution components 14 supply air to the second pH adjustment tank 7, the PAC dosing tank 8, and the PAM dosing tank 9 respectively. In this way, the water flow is disturbed by the air flow, and the water flow is disturbed by mechanical stirring, so as to ensure the mixing efficiency of the reagent and the wastewater, and make the mixing more uniform and thorough. Moreover, while the stirring assembly 13 of the PAC dosing tank 8 is stirring, the pushing member 21 is driven to operate, and combined with the setting of the spring 20, the air supply pipe 17 is pushed up and down at intervals, so that the air distribution assembly 14 follows the up and down movement, which not only further disturbs the wastewater at the bottom of the box 1, but also changes the air distribution height, further improving the mixing effect of the agent and the wastewater. In this way, the synchronous stirring of the three tanks can be achieved through a driving source, and the intermittent up and down movement of the three air distribution assemblies 14 can be achieved synchronously. Combined with the air supply of the air distribution assembly 14, a good mixing treatment of the agent and the wastewater can be achieved.

[0035] Among them, the stirring assembly 13 includes a first bearing seat 131, a hollow stirring shaft 132, and a stirring blade 133. The first bearing seat 131 is fixed to the top of the box body 1. The bottom end of the hollow stirring shaft 132 passes through the first bearing seat 131 and the top wall of the box body 1, and extends to the interior of the box body 1 where multiple stirring blades 133 are fixed. The air distribution assembly 14 includes an air inlet pipe 141 and an arc-shaped air distribution plate 142. The bottom end of the air inlet pipe 141 passes through the hollow stirring shaft 132 and is fixedly connected to the arc-shaped air distribution plate 142. The top end of the air inlet pipe 141 is connected to the air supply pipe 17. The center of curvature of the arc-shaped air distribution plate 142 is located on the axis of the air inlet pipe 141 and above the arc-shaped air distribution plate 142. An air cavity 143 is provided inside the arc-shaped air distribution plate 142. A plurality of first air distribution holes 144 connected to the air cavity 143 are spaced apart from each other at the left and right ends of the arc-shaped air distribution plate 142 from front to back. A plurality of second air distribution holes 145 connected to the air cavity 143 are provided on the top wall of the arc-shaped air distribution plate 142. A plurality of third air distribution holes 146 connected to the air cavity 143 are provided on the bottom wall of the arc-shaped air distribution plate 142. Since the hollow stirring shaft 132 is not directly connected to the motor 18, the air inlet pipe 141 can directly pass through the hollow stirring shaft 132, which is easy to install. In this embodiment, a seal is provided between the air inlet pipe 141 and the hollow stirring shaft 132, and the setting of the seal plays a sealing role. The setting of the arc-shaped air distribution plate 142 is adopted, and the center of curvature of the arc-shaped air distribution plate 142 is located on the axis of the air inlet pipe 141, so that the left and right ends of the arc-shaped air distribution plate 142 are arched upward, and the middle part is downward. This setting makes the air distribution more comprehensive. Through the first air distribution hole 144, air is blown upward obliquely from the left and right sides, combined with the second air distribution hole 145 to blow upward, and the third air distribution hole 146 to blow downward, air is distributed from multiple directions and directions, so that the gas is blown out more comprehensively, thereby making the water flow disturbance more comprehensive, and improving the mixing degree of wastewater and reagents.

[0036] The second air distribution holes 145 and the third air distribution holes 146 are both arranged obliquely toward the air inlet pipe 141, and the second air distribution holes 145 and the third air distribution holes 146 are arranged in a staggered manner. The second air distribution holes 145 arranged obliquely blow air from the periphery to the center side, and the airflow is concentrated at the air inlet pipe 141; combined with the third air distribution holes 146 arranged obliquely, air is blown from the center side to the periphery, so that the airflow is dispersed from the bottom, and combined with the left and right upward inclined airflow, a good airflow disturbance water flow effect is formed.

[0037] Among them, the pushing member 21 includes a first bevel gear 211, a second bevel gear 212, a rotating shaft 213, a second bearing seat 214, and a cam 215. The first bevel gear 211 is fixed to the upper part of the hollow stirring shaft 132 of the stirring assembly 13 of the PAC dosing tank 8, the second bearing seat 214 is fixed to the top of the box body 1, one end of the rotating shaft 213 passes through the second bearing seat 214 to fix the second bevel gear 212, the second bevel gear 212 is meshed with the first bevel gear 211, and the other end of the rotating shaft 213 is fixed to the cam 215. When the hollow stirring shaft 132 of the stirring assembly 13 of the PAC dosing tank 8 rotates, it drives the first bevel gear 211 to rotate, and then drives the second bevel gear 212 to rotate, so that the rotating shaft 213 rotates, and drives the cam 215 to rotate. Combined with the setting of the spring 20, the cam 215 rotates continuously and intermittently drives the air supply pipe 17 to move up and down, so that the air inlet pipe 141 moves up and down, and drives the arc-shaped air distribution plate 142 to move up and down, which not only further disturbs the wastewater at the bottom of the box body 1, but also changes the air distribution height, thereby further improving the mixing effect of the reagent and the wastewater.

[0038] The connecting port between the second pH regulating tank 7 and the PAC dosing tank 8 is located at the bottom, and the connecting port between the PAC dosing tank 8 and the PAM dosing tank 9 is located at the top. This arrangement allows the water flow from the second pH regulating tank 7 to the PAM dosing tank 9 to form a baffle, further improving the mixing of the reagent and the wastewater.

[0039] It also includes two industrial pH meters 22, a metering pump 23, a dosing device 24, and a control panel 25. The detection ends of the two industrial pH meters 22 extend into the Fenton reaction tank 6 and the coagulation sedimentation tank 10 respectively. The first pH regulating tank 3 has a liquid inlet pipe, and the second pH regulating tank 7 has two liquid inlet pipes. The liquid inlet pipes of the first pH regulating tank 3 and the second pH regulating tank 7 are both provided with a metering pump 23. The PAC dosing tank 8 and the PAM dosing tank 9 are both provided with a dosing device 24. The industrial pH meter 22 and the dosing device 24 are both electrically connected to the control panel 25, and the control panel 25 is electrically connected to the metering pump 23. The control panel of this embodiment is fixed to the rear side wall of the box. The pH value of the Fenton reaction tank 6 and the coagulation sedimentation tank 10 is detected online by the industrial pH meter 22, and fed back to the control panel 25, and the control panel 25 controls the corresponding metering pump 23 to add medicine. The dosing device 24 is used to perform PAC dosing and PAM dosing respectively.

[0040] The mud level meter 26 and the mud discharge pump 27 are also included. The detection end of the mud level meter 26 extends into the coagulation sedimentation tank 10. The mud level meter 26 is electrically connected to the control panel 25, and the control panel 25 is electrically connected to the mud discharge pump 27. The mud level meter 26 and the mud discharge pump 27 are provided to realize automatic mud discharge.

[0041] The present embodiment also provides a Fenton treatment method, comprising the following steps: a small test is first performed to obtain the optimal dosage ratio of the wastewater, and the dosage of PAC and PAM is set; an acid solution is placed in the first pH adjustment tank 3, and the wastewater is sent to the first pH adjustment tank 3 to be mixed with the acid solution to adjust the pH of the wastewater; the effluent of the first pH adjustment tank 3 flows through the first pipeline 11; when the water flows through the first pipeline 11, the hydrodynamic proportional dosing pump 2 thereon adds ferrous solution in proportion according to the influent flow rate, and enters the ferrous dosing tank 4 together with the wastewater; the effluent of the ferrous dosing tank 4 flows through the second pipeline; when the water flows through the second pipeline 12, the hydrodynamic proportional dosing pump 2 thereon adds hydrogen peroxide in proportion according to the influent flow rate, and enters the hydrogen peroxide dosing tank 5 together with the wastewater; the effluent of the hydrogen peroxide dosing tank 5 enters the Fenton reaction tank 6 for Fenton reaction; The industrial pH meter 22 of the Fenton reaction tank 6 monitors the pH value of the wastewater therein online, and adjusts the dosage of the metering pump 23 of the first pH adjusting tank 3 according to the pH value. The wastewater after the Fenton reaction enters the second pH adjusting tank 7, and alkali solution is added to the second pH adjusting tank 7. The effluent of the Fenton reaction tank 6 enters the second pH adjusting tank 7 and is mixed with the alkali solution to adjust the pH of the wastewater. The effluent of the second pH adjusting tank 7 enters the PAC dosing tank 8, and PAC is quantitatively added through the dosing device 24. The effluent of the PAC dosing tank 8 enters the PAM dosing tank 9, and PAM is quantitatively added through the dosing device 24. The effluent of the PAM dosing tank 9 enters the coagulation sedimentation tank 10 for sedimentation treatment, and the mud level is monitored by the mud level meter 26. When the mud level reaches the preset position, the mud is automatically discharged through the mud discharge pump 27, and the upper clear water after sedimentation treatment is discharged, and the effluent meets the standard.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A Fenton treatment device, characterized in that: It includes a tank, a hydrodynamic proportional dosing pump, and a first pH adjustment tank, a ferrous dosing tank, a hydrogen peroxide dosing tank, a Fenton reaction tank, a second pH adjustment tank, a PAC dosing tank, a PAM dosing tank, and a coagulation sedimentation tank arranged inside the tank; The left side of the box body is provided with a first pH adjustment tank, a ferrous dosing tank, and a hydrogen peroxide dosing tank from front to back in sequence; The first pH adjustment tank is connected to the ferrous dosing tank through a first pipeline, and the ferrous dosing tank is connected to the hydrogen peroxide dosing tank through a second pipeline, and a hydrodynamic proportional dosing pump is provided on the first pipeline and the second pipeline; The Fenton reaction tank is located on the right side of the hydrogen peroxide dosing tank and is connected to the hydrogen peroxide dosing tank; The box on the right side of the Fenton reaction tank is provided with a second pH adjustment tank, a PAC dosing tank, and a PAM dosing tank which are interconnected from front to back, and the second pH adjustment tank is connected to the Fenton reaction tank; A coagulation sedimentation tank is arranged on the right side of the box body, and the coagulation sedimentation tank is connected to the PAM dosing tank; The hydrodynamic proportional dosing pump between the first pH adjustment tank and the ferrous dosing tank adds ferrous solution to the ferrous dosing tank, and the hydrodynamic proportional dosing pump between the ferrous dosing tank and the hydrogen peroxide dosing tank adds hydrogen peroxide to the hydrogen peroxide dosing tank; The second pH adjustment tank, the PAC dosing tank, and the PAM dosing tank are all provided with a stirring component and an air distribution component; One end of the air distribution assembly is located below the stirring assembly, and the other end of the air distribution assembly passes through the stirring assembly and extends to the outside of the box; A hair dryer is fixed on one side of the top of the box body, and the hair dryer is connected to an air supply pipe through a hose, and the air supply pipe is connected to one end of each of the air distribution components extending out of the box body; A motor is fixed on the other side of the top of the box body, and the motor drives the stirring assembly of the second pH adjustment tank to rotate through the transmission assembly. The stirring assembly of the second pH adjustment tank and the stirring assembly of the PAC dosing tank are connected by transmission through the transmission assembly, and the stirring assembly of the PAC dosing tank and the stirring assembly of the PAM dosing tank are connected by transmission through the transmission assembly; A spring is connected between the air supply pipe and the top wall of the box body; A pusher is fixed on the top of the box body. The pusher is located below the air supply pipe and is driven by a stirring assembly of the PAC dosing tank.

2. The Fenton treatment device according to claim 1, characterized in that: The stirring assembly includes a first bearing seat, a hollow stirring shaft, and a stirring blade; The first bearing seat is fixed to the top of the box body, and the bottom end of the hollow stirring shaft passes through the first bearing seat and the top wall of the box body, and extends to the inside of the box body where a plurality of stirring blades are fixed.

3. The Fenton treatment device according to claim 2, characterized in that: The air distribution assembly includes an air inlet pipe and an arc-shaped air distribution plate; The bottom end of the air inlet pipe passes through the hollow stirring shaft and is fixedly connected to an arc-shaped air distribution plate, and the top end of the air inlet pipe is connected to the air supply pipe; The center of curvature of the arc-shaped air distribution plate is located on the axis of the air inlet pipe and above the arc-shaped air distribution plate; An air cavity is provided inside the arc-shaped air distribution plate; The left and right ends of the arc-shaped air distribution plate are each provided with a plurality of first air distribution holes communicating with the air cavity spaced from front to back; The top wall of the arc-shaped air distribution plate is provided with a plurality of second air distribution holes communicating with the air cavity; The bottom wall of the arc-shaped air distribution plate is provided with a plurality of third air distribution holes communicated with the air cavity.

4. The Fenton treatment device according to claim 3, characterized in that: The second air distribution hole and the third air distribution hole are both arranged obliquely toward the air inlet pipe; The second air distribution holes and the third air distribution holes are staggered.

5. The Fenton treatment device according to claim 1, characterized in that: The pusher includes a first bevel gear, a second bevel gear, a rotating shaft, a second bearing seat, and a cam; The first bevel gear is fixed to the upper part of the hollow stirring shaft of the stirring assembly of the PAC dosing tank; The second bearing seat is fixed to the top of the box body, one end of the rotating shaft passes through the second bearing seat and is fixed with a second bevel gear, and the second bevel gear is meshed with the first bevel gear; A cam is fixed on the other end of the rotating shaft.

6. The Fenton treatment device according to claim 1, characterized in that: The communication port between the second pH adjustment tank and the PAC dosing tank is located at the bottom; The communication port between the PAC dosing tank and the PAM dosing tank is located at the top.

7. The Fenton treatment device according to claim 1, characterized in that: Also included are two industrial pH meters, metering pumps, dosing devices, and a control panel; The detection ends of the two industrial pH meters extend into the Fenton reaction tank and the coagulation sedimentation tank respectively; The first pH adjustment tank has one liquid inlet pipe, and the second pH adjustment tank has two liquid inlet pipes; The liquid inlet pipes of the first pH regulating tank and the second pH regulating tank are both provided with metering pumps; The PAC dosing tank and the PAM dosing tank are both provided with a doser; The industrial pH meter and the dosing device are both electrically connected to the control panel, and the control panel is electrically connected to the metering pump.

8. The Fenton treatment device according to claim 7, characterized in that: It also includes a mud level meter and a mud pump; The detection end of the mud level meter extends into the coagulation sedimentation tank; The mud level meter is electrically connected to the control panel, and the control panel is electrically connected to the mud discharge pump.

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