A fenton reaction device

Abstract

The utility model relates to a kind of fenton reaction device. Including reactor, at least one flow guide pipe and a hydrogen peroxide dosing device;Flow guide pipe is vertically arranged, its upper end is for the feed inlet of access wastewater and ferrous solution, lower end extends to the inside of reactor;Spiral structure is equipped in the inside of flow guide pipe;Hydrogen peroxide dosing device includes a driving motor, a hollow connecting shaft and stirring vane;Driving motor is set to the outside of reactor;The upper end of connecting shaft passes through the top wall of reactor and is connected with the output end of driving motor by sealing structure, is driven to rotate by it;Stirring vane is set on connecting shaft and is located in the inside of reactor;A dosing pipe is inserted from the bottom of reactor and extends into the inside of hollow connecting shaft, and is connected with it;A plurality of micropores are set on stirring vane, and micropore is connected with the inside of hollow connecting shaft.The technical problem to be solved by the utility model is that traditional hydrogen peroxide adding mode (jet or top spraying) leads to uneven distribution of medicament, triggers local concentration too high and triggers free radical quenching effect, thereby leading to low fenton reaction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a Fenton reaction device. Background Technology

[0002] The Fenton reaction is an advanced oxidation technology widely used in industrial wastewater treatment, particularly effective for treating recalcitrant organic pollutants. This reaction primarily utilizes Fe... 2+ Catalytic decomposition of H₂O₂ generates highly oxidizing hydroxyl radicals, which then oxidize and degrade organic pollutants in water. With increasingly stringent environmental protection requirements, the design and optimization of Fenton reactors have become a research hotspot.

[0003] Currently, conventional Fenton reactors, as shown in Chinese patent CN205590391U, consist of three sections: upper, middle, and lower, separated by two perforated baffles. They are equipped with a spiral stirrer and a dosing device. Hydrogen peroxide enters directly into the middle section of the reactor through a delivery pipe, where it undergoes a redox reaction simultaneously with the packing material. The dispersion effect of hydrogen peroxide in this structure needs improvement.

[0004] Existing Fenton reaction devices generally suffer from the following problems: Firstly, hydrogen peroxide, as a strong oxidant, tends to form high-concentration zones in localized areas after being added to the reaction system, leading to uneven reaction and reduced oxidation efficiency. Secondly, hydrogen peroxide reacts rapidly with ferrous ions to generate hydroxyl radicals, but due to limitations in conventional dosing methods and mixing efficiency, the material dispersion time is too long, causing some hydroxyl radicals to become ineffective before the reactants are fully mixed, severely affecting the reaction effect and processing efficiency. Furthermore, the stirring system in existing devices is often independent of the dosing system, making it difficult to achieve precise dosing and uniform dispersion of hydrogen peroxide, further limiting the efficiency and stability of the Fenton reaction.

[0005] Therefore, there is an urgent need for a Fenton reaction device that can achieve rapid and uniform dispersion of hydrogen peroxide and improve reaction efficiency, in order to solve the problems of poor reaction effect caused by excessively long material dispersion time and insufficient mixing in the existing technology. Utility Model Content

[0006] The technical problem to be solved by this invention is that the traditional hydrogen peroxide addition method (jet or top spray) leads to uneven distribution of the agent, resulting in excessively high local concentrations that trigger the free radical quenching effect, thus causing low Fenton reaction efficiency.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] According to one aspect of the present invention, a Fenton reaction apparatus is provided, comprising a reactor, at least one guide pipe, and a hydrogen peroxide dosing device; the guide pipe is vertically arranged, with its upper end serving as an inlet for receiving wastewater and ferrous solution, and its lower end extending into the reactor; the guide pipe has a spiral structure inside; the hydrogen peroxide dosing device includes a drive motor, a hollow connecting shaft, and stirring blades; the drive motor is located outside the reactor; the upper end of the connecting shaft passes through the top wall of the reactor and is connected to the output end of the drive motor through a sealing structure, and is driven to rotate by the drive motor; the stirring blades are arranged on the connecting shaft and located inside the reactor; a dosing pipe passes through the bottom of the reactor and extends into the hollow connecting shaft, communicating with it; the stirring blades have a plurality of micropores, which communicate with the interior of the hollow connecting shaft.

[0009] Optionally, a guide cone is provided at the lower outlet of the guide tube. The guide cone is a conical structure with a gradually expanding diameter from top to bottom, and the diameter of its lower circular cross-section is larger than the diameter of the guide tube.

[0010] Alternatively, the guide cone may be a solid cone with several guide holes on its surface.

[0011] Optionally, the number of guide pipes is multiple, and they are evenly distributed at the top of the reactor.

[0012] Optionally, the stirring blade has a cavity inside for storing hydrogen peroxide, and the hollow connecting shaft is connected to the cavity inside the stirring blade.

[0013] Alternatively, the stirring blades may be straight or angled.

[0014] Optionally, the number of stirring blades is multiple, and they are evenly distributed along the axial and circumferential directions of the connecting shaft.

[0015] Optionally, the micropores are uniformly distributed on the stirring blades.

[0016] Optionally, a flow control valve may be provided on the dosing pipe.

[0017] Optionally, the flow guide cone and the lower end of the flow guide tube can be detachably connected or fixedly connected.

[0018] The advantages of this utility model are:

[0019] 1. The Fenton reaction device of this utility model, by setting a spiral structure inside the guide tube, increases the falling time of the wastewater and ferrous solution mixture, thereby improving the mixing time of each mixture; on the other hand, it enables the mixtures to mix continuously during the falling process, achieving an automatic stirring effect.

[0020] 2. This utility model improves the mixing effect by setting a guide cone at the lower end of the guide pipe, which allows the mixture to be more evenly dispersed when entering the reactor.

[0021] 3. The hydrogen peroxide dosing device of this utility model adopts a structure that combines a hollow connecting shaft with micropores on the stirring blades, which allows hydrogen peroxide to be evenly dispersed into the reactor from the micropores of the stirring blades, improving the uniformity of hydrogen peroxide distribution. At the same time, the rotation of the stirring blades also promotes the mixing of reactants, further improving the efficiency of the Fenton reaction.

[0022] 4. The overall device structure of this utility model is reasonably designed, and the components work together to ensure that the materials are fully mixed. This effectively solves the problem that the material dispersion time is too long in conventional Fenton reaction devices, and the material may become ineffective before it is fully mixed, thus significantly improving the efficiency of the Fenton reaction. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the Fenton reaction apparatus described in this utility model;

[0025] Figure 2 This utility model Figure 1 Enlarged view of section A in the middle.

[0026] In the diagram: 1. Reactor; 2. Guide pipe; 201. Spiral structure; 202. Guide cone; 2021. Guide hole; 3. Dosing device; 301. Drive motor; 302. Connecting shaft; 303. Stirring blade; 3031. Micropore; 4. Dosing pipe. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1:

[0029] like Figure 1As shown, a Fenton reaction apparatus includes a reactor 1, a flow guide pipe 2, and a hydrogen peroxide dosing device 3.

[0030] Reactor 1 is the main container for wastewater treatment. It has a closed chamber structure specifically designed to contain wastewater and perform Fenton reaction treatment. The top of reactor 1 has several openings for installing guide pipes 2; the bottom has an outlet for discharging the treated water. Reactor 1 is designed to ensure that the wastewater can fully contact the reaction reagents during treatment, thereby achieving efficient pollutant degradation.

[0031] A guide pipe 2 is vertically installed at the top of reactor 1. The upper end of the guide pipe 2 is the inlet for receiving wastewater and ferrous solution; the lower end extends into the interior of reactor 1. Inside the guide pipe 2 is a spiral structure 201, which can be a spiral blade fixed to the inner wall of the guide pipe 2 or a section of spiral-shaped pipe. The spiral structure 201 causes the fluid to rotate during flow, enhancing the mixing effect of wastewater and ferrous solution and improving reaction efficiency. At the lower outlet of the guide pipe 2 is a guide cone 202, which is a cone-shaped structure with a gradually expanding diameter from top to bottom. The diameter of its lower circular cross-section is larger than the diameter of the guide pipe 2. The guide cone 202 guides the fluid to diffuse in all directions, preventing the fluid from directly impacting the bottom of reactor 1 and ensuring uniform distribution of the fluid within reactor 1. The guide cone 202 is a solid cone with several guide holes 2021 on its surface. These guide holes 2021 allow the fluid to flow out from multiple directions, further enhancing the fluid dispersion effect. The guide cone 202 and the lower end of the guide pipe 2 can be detachably connected or fixedly connected. A detachable connection facilitates cleaning and maintenance, while a fixed connection improves structural stability.

[0032] There can be multiple guide pipes 2, evenly distributed at the top of reactor 1. In a preferred embodiment, there are two guide pipes 2, symmetrically distributed on both sides of the top of reactor 1. The arrangement of two guide pipes 2 allows wastewater and ferrous solution to enter reactor 1 from multiple inlets, improving feed uniformity and preventing excessively high local concentrations. This design ensures that wastewater and ferrous solution are more evenly distributed within reactor 1, guaranteeing that every portion of wastewater fully participates in the reaction.

[0033] The hydrogen peroxide dosing device 3 includes a drive motor 301, a hollow connecting shaft 302, and stirring blades 303. The drive motor 301 is located outside the reactor 1 and provides power to the entire dosing device 3. The upper end of the hollow connecting shaft 302 passes through the top wall of the reactor 1 and is connected to the output end of the drive motor 301 via a sealing structure, and is driven to rotate by the drive motor 301. The sealing structure prevents liquid leakage from the reactor 1. The stirring blades 303 are mounted on the connecting shaft 302 and located inside the reactor 1, rotating together with the connecting shaft 302 to stir the liquid inside the reactor 1, promoting uniform reaction.

[0034] In a preferred embodiment, there are multiple stirring blades 303, evenly distributed along the axial and circumferential directions of the connecting shaft 302. The arrangement of multiple stirring blades 303 increases the stirring area and improves stirring efficiency, resulting in more thorough mixing of the liquid within the reactor 1. Through this design, the stirring blades 303 can more effectively promote liquid mixing, making the reaction more uniform and ensuring that every portion of the liquid participates in the reaction.

[0035] The dosing pipe 4 passes through the bottom of the reactor 1 and extends into the hollow connecting shaft 302, where it is connected. Hydrogen peroxide enters the hollow connecting shaft 302 through the dosing pipe 4, and then is sprayed out through the micro-holes 3031 on the stirring blades 303. The stirring blades 303 have several micro-holes 3031, which are connected to the interior of the hollow connecting shaft 302, forming a hydrogen peroxide spray channel.

[0036] like Figure 2 As shown, multiple sub-pipes are formed at the top of the dosing pipe 4 that passes through the connecting shaft. The multiple sub-pipes are evenly distributed. Hydrogen peroxide enters from the bottom through the main pipe of the dosing pipe 4, enters the inner cavity of the connecting shaft 302 through the multiple sub-pipes, enters the stirring blade 303 through the connecting shaft 302, and finally enters the reactor 1 through the micropores on the stirring blade.

[0037] In a preferred embodiment, micropores 3031 are uniformly distributed on the stirring blades 303. The uniformly distributed micropores 3031 allow hydrogen peroxide to be released evenly within the reactor 1, avoiding excessively high local concentrations and improving reaction efficiency and safety. This design ensures that hydrogen peroxide is more evenly distributed within the reactor 1, guaranteeing that every portion of the liquid fully participates in the reaction.

[0038] In a preferred embodiment, a flow control valve is installed on the dosing pipe 4. The flow control valve can precisely control the amount and rate of hydrogen peroxide added, adjusting the dosage according to actual needs to ensure the reaction proceeds safely and efficiently. The design of the flow control valve allows the amount of hydrogen peroxide added to be adjusted according to actual requirements, ensuring the safety and efficiency of the reaction process.

[0039] The working process of the Fenton reactor is as follows: wastewater and ferrous solution enter from the feed port at the upper end of the guide pipe 2. Under the action of the spiral structure 201 inside the guide pipe 2, they are mixed by rotation. Then, they are evenly dispersed into the reactor 1 through the guide cone 202. At the same time, the drive motor 301 drives the connecting shaft 302 and the stirring blade 303 to rotate, stirring the liquid in the reactor 1. Hydrogen peroxide enters the hollow connecting shaft 302 through the dosing pipe 4, and is then evenly sprayed into the reaction liquid through the micropores 3031 on the stirring blade 303. It reacts with ferrous ions to generate highly active hydroxyl radicals, which oxidize and degrade the organic pollutants in the wastewater.

[0040] This Fenton reaction apparatus, through a special flow guiding structure and hydrogen peroxide dosing device 3, achieves thorough mixing of wastewater and reagents, and uniform addition of hydrogen peroxide, thus improving the efficiency and safety of the Fenton reaction, reducing energy consumption, and offering advantages such as simple structure, convenient operation, and good treatment effect. Through this design, the apparatus can achieve efficient pollutant degradation during wastewater treatment, ensuring the safety and efficiency of the reaction process while reducing energy consumption, and boasts advantages such as simple structure, convenient operation, and good treatment effect.

[0041] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A Fenton reaction apparatus, comprising a reactor, characterized in that: It also includes at least one flow tube and a hydrogen peroxide dosing device; The guide pipe is vertically arranged, with its upper end being an inlet for receiving wastewater and ferrous solution, and its lower end extending into the reactor; the guide pipe has a spiral structure inside. The hydrogen peroxide dosing device includes a drive motor, a hollow connecting shaft, and stirring blades. The drive motor is located outside the reactor. The upper end of the connecting shaft passes through the top wall of the reactor and is connected to the output end of the drive motor through a sealing structure, and is driven to rotate by the drive motor. The stirring blades are mounted on the connecting shaft and located inside the reactor. A dosing tube passes through the bottom of the reactor and extends into the hollow connecting shaft, communicating with it. The stirring blades have several micropores, which communicate with the interior of the hollow connecting shaft.

2. The Fenton reaction apparatus according to claim 1, characterized in that: A guide cone is provided at the lower outlet of the guide pipe. The guide cone is a conical structure with a diameter that gradually expands from top to bottom, and the diameter of its lower circular cross-section is larger than the diameter of the guide pipe.

3. The Fenton reaction apparatus according to claim 2, characterized in that: The guide cone is a solid cone with several guide holes on its surface.

4. The Fenton reaction apparatus according to claim 1, characterized in that: There are multiple guide pipes, which are evenly distributed at the top of the reactor.

5. The Fenton reaction apparatus according to claim 1, characterized in that: The stirring blade has a cavity inside for storing hydrogen peroxide, and the hollow connecting shaft is connected to the cavity inside the stirring blade.

6. The Fenton reaction apparatus according to claim 1, characterized in that: The stirring blades are straight blades or oblique blades.

7. The Fenton reaction apparatus according to claim 1, characterized in that: The number of stirring blades is multiple, and they are evenly distributed along the axial and circumferential directions of the connecting shaft.

8. The Fenton reaction apparatus according to claim 1, characterized in that: The micropores are evenly distributed on the stirring blades.

9. The Fenton reaction apparatus according to claim 1, characterized in that: The dosing pipe is equipped with a flow control valve.

10. The Fenton reaction apparatus according to claim 2, characterized in that: The lower end of the guide cone and the guide tube are either detachably connected or fixedly connected.

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