Microwave catalysis Fenton synergistic reaction device for organic wastewater treatment

Abstract

The utility model discloses a microwave catalysis Fenton synergistic reaction device for organic wastewater treatment, which relates to the field of white spirit wastewater treatment and comprises a reaction box, a microwave generator for generating a microwave field into the reaction box is arranged on the reaction box, and a driving mechanism and an air pump are further arranged on the reaction box. A stirring shaft of the driving mechanism extends into the reaction box, a stirring blade is arranged on the stirring shaft, a plurality of air holes are formed in the stirring blade, and the air pump is communicated with the air holes. According to the device, gas generated by the gas pump acts into the reaction tank, so that the mixing strength of wastewater and a Fenton reagent in the reaction tank can be improved, the purpose of cooling the wastewater can be achieved, and the oxidative degradation capacity of organic pollutants in the wastewater is improved.

Description

Technical Field

[0001] This utility model relates to the field of liquor wastewater treatment technology, specifically to a microwave catalytic Fenton synergistic reaction device for organic wastewater treatment. Background Technology

[0002] The raw materials for baijiu (Chinese liquor) are mainly wheat, corn, and sorghum. Wastewater generated during the brewing process includes distillation bottom pot water, koji box cleaning water, koji printing wastewater, baijiu lees waste liquid, fermentation tank leachate, grain soaking water, distillation cooling water, and equipment cleaning wastewater. This type of wastewater mainly consists of amino acids, low-carbon alcohols (such as ethanol and pentanol), and fatty acids, and is classified as high-concentration organic wastewater. It is characterized by high chemical oxygen demand (COD) concentration, high suspended solids (SS) content, strong biodegradability, and complex composition.

[0003] Currently, conventional wastewater treatment methods (such as biochemical and membrane methods) are insufficient for treating organic wastewater. To address this issue, advanced oxidation technologies have gained significant attention in recent years. Fenton oxidation technology, which generates highly potent hydroxyl radicals, is one of the most promising advanced oxidation water treatment technologies. Fenton oxidation technology utilizes Fenton reagent (ferrous ions and hydrogen peroxide) under acidic conditions. Ferrous ions catalyze the decomposition of hydrogen peroxide to produce highly oxidizing hydroxyl radicals, which can oxidize and decompose many recalcitrant organic pollutants or those that are difficult to oxidize using conventional chemical oxidation methods. For example, Chinese utility model patent CN211620247U discloses a radio frequency Fenton oxidation water treatment device, including at least one radio frequency activation device and a radio frequency activation reactor. The radio frequency activation reactor has a reaction chamber with an inlet and an outlet. The radio frequency activation device emits a radio frequency field into the reactor to generate electromagnetic waves within the reaction chamber. The wastewater to be treated and the Fenton reagent flow into the reaction chamber through the inlet, and the treated solution flows out through the outlet. Radio frequency (RF) activation equipment emits an RF field into the RF activation reactor. The generated electromagnetic waves interact with polar molecules in the wastewater to produce a microwave electric field. This microwave electric field intensifies the molecular activity of organic pollutants in the wastewater, enhancing the oxidative degradation capacity of organic pollutants. The microwave electric field also provides more energy for the reaction of Fenton's reagent catalytic decomposition to generate hydroxyl radicals, lowering the activation energy to produce more hydroxyl radicals, improving reaction efficiency and hydrogen peroxide utilization, reducing reagent dosage, and reducing iron sludge content. However, since the Fenton reaction occurring in the mixture of organic wastewater and Fenton's reagent is an exothermic reaction, the temperature inside the RF activation reactor is relatively high, which is detrimental to the oxidative degradation capacity of organic pollutants in the wastewater. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art. The purpose is to provide a microwave catalytic Fenton synergistic reaction device for the treatment of organic wastewater. By using the gas generated by the gas pump to act on the reaction tank, it can not only improve the mixing strength of wastewater and Fenton reagent in the reaction tank, but also achieve the purpose of cooling the wastewater and improving the oxidative degradation capacity of organic pollutants in the wastewater.

[0005] This utility model is achieved through the following technical solution:

[0006] A microwave catalytic Fenton synergistic reaction device for treating organic wastewater includes a reaction chamber. The reaction chamber is equipped with a microwave generator for generating a microwave field inside the reaction chamber. The reaction chamber is also equipped with a drive mechanism and an air pump. The stirring shaft of the drive mechanism extends into the reaction chamber. The stirring shaft is equipped with stirring blades. The stirring blades are provided with a plurality of air holes. The air pump is connected to the air holes.

[0007] Furthermore, the top of the reaction chamber is provided with a cover, the drive mechanism is fixed on the cover, and the stirring shaft extends into the reaction chamber after passing through the cover.

[0008] Furthermore, the stirring shaft has a cavity inside, which communicates with the air holes on the stirring plate and is also connected to the bottom end of the stirring shaft.

[0009] The reaction chamber is also equipped with a movable shaft on its inner bottom. The movable shaft can rotate around its own axis inside the reaction chamber. The top of the movable shaft is equipped with a mounting hole with an inner diameter that matches the outer diameter of the stirring shaft. The mounting hole is connected to the air pump. The bottom end of the movable shaft is located inside the mounting hole.

[0010] Furthermore, a limiting groove is provided on the inner wall of the mounting hole of the movable shaft, the limiting groove is connected to the top of the movable shaft, and a limiting ball is provided on the side wall of the stirring shaft, the limiting ball being located in the limiting groove.

[0011] Furthermore, there are two stirring blades, which are located on different axes of the stirring shaft.

[0012] Furthermore, the reaction chamber is also provided with an installation cavity, which is distributed along the circumference of the reaction chamber, and an airbag is provided in the installation cavity;

[0013] The movable end of the airbag is equipped with an elastic push plate. One end of the push plate is connected to the airbag, and the other end extends into the reaction chamber along the radial direction. The stirring plate and the push plate are in the same horizontal plane.

[0014] The length of the push plate extending into the reaction chamber is greater than the distance between the end of the stirring plate and the inner wall of the reaction chamber;

[0015] The push plate is also provided with an air inlet that communicates with the airbag.

[0016] Furthermore, the side wall of the reaction chamber is provided with a strip groove, which is distributed along the circumference of the reaction chamber and communicates with the mounting cavity, and the push plate is located in the strip groove.

[0017] Furthermore, the outer surface of the reaction chamber is also provided with an air inlet pipe that communicates with the air bladder, and both the air inlet pipe and the air vent are provided with one-way valves.

[0018] Furthermore, the reaction chamber is also provided with an elastic element, one end of which is fixed to the installation chamber and the other end is connected to the push plate.

[0019] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0020] This invention utilizes an air pump to deliver cold air to the air holes on the stirring plate. The cold air acting on the reaction chamber can both bubble the wastewater, improving the mixing strength of the wastewater and Fenton's reagent, and cool the wastewater, keeping it within the optimal reaction temperature range and enhancing the oxidation and degradation capacity of organic pollutants in the wastewater. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a structural schematic diagram of another state of the present invention;

[0024] Figure 3 This utility model Figure 1 A magnified structural diagram of A in the middle;

[0025] Figure 4 This is a top view of the movable axis of this utility model;

[0026] Figure 5 This is a top view of the reaction chamber of this utility model;

[0027] Figure 6 This is a top view of the reaction chamber of this utility model in another state;

[0028] Figure 7 This is a schematic diagram of the connection structure between the push plate and the airbag of this utility model.

[0029] The attached diagram shows the markings and corresponding component names:

[0030] 1. Reaction chamber; 2. Water inlet pipe; 3. Drain pipe; 4. Sedimentation tank; 5. Drive mechanism; 6. Tank cover; 7. Stirring blade; 8. Stirring shaft; 9. Air pump; 10. Movable shaft; 11. Limiting ball; 12. Cavity; 13. Mounting hole; 14. Bearing; 15. Limiting groove; 16. Airbag; 17. Push plate; 18. Elastic element; 19. Air vent; 20. Air inlet pipe. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0032] Example

[0033] like Figures 1 to 7 As shown, this utility model includes a reaction chamber 1, on which a microwave generator for generating a microwave field is provided. The reaction chamber 1 is also provided with a drive mechanism 5 and an air pump 9. The stirring shaft 8 of the drive mechanism 5 extends into the reaction chamber 1. The stirring shaft 8 is provided with a stirring blade 7. The stirring blade 7 is provided with a plurality of air holes. The air pump 9 is connected to the air holes.

[0034] In existing technologies for treating organic wastewater generated during liquor brewing, microwave catalytic Fenton technology is commonly used. This involves using Fenton's reagent under acidic conditions to catalyze the decomposition of hydrogen peroxide with ferrous ions, generating highly oxidizing hydroxyl radicals. These radicals can oxidize and decompose many recalcitrant or chemically difficult-to-oxidize organic pollutants, thus treating the wastewater. However, the Fenton reaction in the mixture of organic wastewater and Fenton's reagent is exothermic, resulting in high temperatures within the radio frequency activation reactor, which is detrimental to the oxidative degradation of organic pollutants in the wastewater. Therefore, this technical solution incorporates a drive mechanism 5, which is a motor, into the existing reaction tank 1. During operation, this drive mechanism 5 drives the stirring shaft 8, causing the stirring blades 7 to rotate within the reaction tank 1. This mechanism is used for treating liquor wastewater. Wastewater to be treated is introduced into reaction tank 1 through inlet pipe 2. An appropriate amount of Fenton reagent is added to reaction tank 1. The wastewater to be treated and Fenton reagent in reaction tank 1 are thoroughly stirred and mixed using drive mechanism 5. Hydrogen peroxide and ferrous ions are also thoroughly stirred with the wastewater to be treated. Then, a radio frequency field is emitted into reaction tank 1 using a microwave generator. A microwave field is generated in reaction tank 1. Under the action of the microwave field, Fenton reagent combines with microwave high-energy electrons to generate hydroxyl radicals. The hydroxyl radicals fully collide and heat the organic molecules in the liquor organic waste liquid, thereby specifically increasing the kinetic energy of the organic molecules in the waste liquid and increasing the reaction cross section. Under mild conditions, the decomposition and cracking of recalcitrant and recalcitrant organic matter are achieved. After the reaction is complete, the wastewater after the reaction is discharged into sedimentation tank 4 through drain pipe 3 to achieve solid-liquid separation of wastewater.

[0035] During the reaction of Fenton's reagent with wastewater, heat is gradually released into the reaction chamber 1. At this time, the air pump 9 delivers cold air to the air holes on the stirrer 7, allowing the cold air to act on the wastewater in the reaction chamber 1. The stirrer 7 dissipates heat from the wastewater while mixing with Fenton's reagent, thereby lowering the temperature inside the reaction chamber 1 and bringing it to the optimal reaction temperature, thus improving the oxidation and degradation capacity of organic pollutants in the wastewater. At the same time, when the gas is blown out from the air holes on the stirrer 7, it also bubbles the wastewater in the reaction chamber 1, further ensuring that the wastewater and Fenton's reagent are thoroughly mixed.

[0036] The top of the reaction chamber 1 is provided with a cover 6, the drive mechanism 5 is fixed on the cover 6, and the stirring shaft 8 extends into the reaction chamber 1 after passing through the cover 6.

[0037] In this embodiment, the cover 6 is used to install the drive mechanism 5, ensuring that the stirring shaft 8 of the drive mechanism 5 is stably positioned inside the reaction chamber 1; at the same time, the cover 6 is also provided with a feeding port for adding Fenton reagent into the reaction chamber 1.

[0038] The stirring shaft 8 has a cavity 12 inside, which is connected to the air hole on the stirring plate 7 and is also connected to the bottom end of the stirring shaft 8. The inner bottom of the reaction tank 1 is also provided with a movable shaft 10, which can rotate around its own axis inside the reaction tank 1. The top of the movable shaft 10 is provided with a mounting hole 13 with an inner diameter that is the same as the outer diameter of the stirring shaft 8. The mounting hole 13 is connected to the air pump 9, and the bottom end of the movable shaft 10 is located in the mounting hole 13.

[0039] Since the driving mechanism 5 drives the stirring shaft 8 to rotate inside the reaction chamber 1 when it is working, and in order to ensure that the air pump 9 can deliver air to the air holes on the rotating stirring blade 7, a movable shaft 10 is provided at the bottom of the reaction chamber 1 in this embodiment. The movable shaft 10 is rotatably connected to the reaction chamber 1 through the bearing 14. In this way, when the chamber cover 6 is placed on the reaction chamber 1, the bottom end of the stirring shaft 8 is inserted into the mounting hole 13 at the top of the movable shaft 10, so that the cavity 12 of the movable shaft 10 is in a communication state with the mounting hole 13. In this way, when the air pump 9 delivers gas into the mounting hole 13, the gas entering the mounting hole 13 can be transmitted to the air holes on the stirring blade 7 through the cavity 12, so that the gas acts on the wastewater in the reaction chamber 1 to achieve the purpose of heat dissipation and cooling of the wastewater.

[0040] The inner wall of the mounting hole 13 of the movable shaft 10 is also provided with a limiting groove 15, which is connected to the top of the movable shaft 10. The side wall of the stirring shaft 8 is also provided with a limiting ball 11, which is located in the limiting groove 15.

[0041] In this embodiment, in order to avoid large frictional wear between the stirring shaft 8 and the movable shaft 10, a limiting groove 15 for installing the limiting ball 11 is provided on the inner wall of the movable shaft 10. In this way, when the driving mechanism 5 drives the stirring shaft 8 to rotate, the limiting ball 11 can drive the movable shaft 10 to rotate synchronously.

[0042] There are two stirring blades 7, which are located on different axes of the stirring shaft 8.

[0043] In this embodiment, to further improve the mixing effect of wastewater and Fenton's reagent in the reaction tank 1, a stirring blade 7 is provided at a low height of the stirring shaft 8. In this way, when the stirring blade 7 is used to stir and mix the wastewater in the reaction tank 1, the two stirring blades 7 at different heights can act on the wastewater at different depths in the reaction tank 1, ensuring that the wastewater can fully react with Fenton's reagent. At the same time, when cooling the wastewater in the reaction tank 1, the airflow blown out by the air holes on the stirring blades 7 at different depths can act on the wastewater at different depths in the reaction tank 1, further improving the purpose of cooling the wastewater.

[0044] The reaction chamber 1 is also provided with an installation cavity, which is distributed around the circumference of the reaction chamber 1. An air bladder 16 is provided in the installation cavity. The movable end of the air bladder 16 is provided with an elastic push plate 17. One end of the push plate 17 is connected to the air bladder 16, and the other end extends into the reaction chamber 1 radially. The stirring blade 7 and the push plate 17 are in the same horizontal plane. The length of the push plate 17 extending into the reaction chamber 1 is greater than the distance between the end of the stirring blade 7 and the inner wall of the reaction chamber 1. The push plate 17 is also provided with an air vent 19 communicating with the air bladder 16.

[0045] In this embodiment, to further improve the mixing effect of wastewater and Fenton's reagent in reaction chamber 1, and to further enhance the heat dissipation of wastewater in reaction chamber 1 when heat dissipation is required, an installation cavity is also provided inside the inner wall of reaction chamber 1. The installation cavity is arranged along the circumference of reaction chamber 1, and an airbag 16 and a pusher plate 17 are provided in the installation cavity. In the initial state, the airbag 16 is filled with air. Since the pusher plate 17 and the stirring plate 7 are on the same horizontal plane inside reaction chamber 1... In this way, when the driving mechanism 5 drives the stirring blade 7 to rotate circumferentially in the reaction chamber 1, when the stirring blade 7 rotates to the push plate 17, the stirring blade 7 will push the push plate 17 to rotate circumferentially in the reaction chamber 1. During the rotation of the push plate 17 along the inner wall of the reaction chamber 1, it will squeeze the air bag 16, thereby causing the air inside the air bag 16 to act on the wastewater through the air hole 19. This not only improves the mixing strength of the wastewater and Fenton reagent, but also allows the airflow blown out from the air bag 16 to cool the wastewater.

[0046] When the stirring plate 7 pushes the push plate 17 to the maximum compression of the airbag 16, the driving mechanism 5 drives the stirring plate 7 to continue rotating. Since the push plate 17 is made of spring steel, it has a certain elasticity and is easy to deform. Therefore, the stirring plate 7 will force the contact part between the push plate 17 and the stirring plate 7 to deform, so that the stirring plate 7 can pass smoothly through the push plate 17.

[0047] The side wall of the reaction chamber 1 is also provided with a strip groove, which is distributed around the circumference of the reaction chamber 1 and communicates with the mounting cavity. The push plate 17 is located in the strip groove.

[0048] In this embodiment, in order to ensure that the pusher plate 17 can move smoothly along the circumferential direction on the inner wall of the reaction chamber 1 under the push of the stirring plate 7, so as to squeeze the air bag 16, a strip groove is also provided on the inner wall of the reaction chamber 1. In this way, when the stirring plate 7 pushes the pusher plate 17 to move, the stirring plate 7 can move in the strip groove to smoothly squeeze the air bag 16.

[0049] The outer surface of the reaction chamber 1 is also provided with an air inlet pipe 20 that communicates with the air bag 16. Both the air inlet pipe 20 and the air vent 19 are provided with one-way valves.

[0050] In this embodiment, to ensure that the airbag 16 can continuously bubble into the reaction chamber 1 and improve the thorough mixing of wastewater and Fenton's reagent in the reaction chamber 1, an air inlet pipe 20 is provided on the outer wall of the reaction chamber 1. One end of the air inlet pipe 20 is connected to the airbag 16, and the other end is connected to the outside. At the same time, one-way valves are provided in both the air inlet pipe 20 and the air vent 19. In this way, when the stirring plate 7 pushes the push plate 17 to squeeze the airbag 16, the air inside the airbag 16 cannot be discharged to the outside through the air inlet pipe 20. It can only act on the wastewater in the reaction chamber 1 through the one-way valve in the air vent 19 to achieve the purpose of bubbling and heat dissipation of the wastewater. When the stirring plate 7 passes the push plate 17, the airbag 16 returns to its original shape under its own elasticity, and a negative pressure is generated inside it. Air from the outside is drawn into the airbag 16 through the air inlet pipe 20 so that the stirring plate 7 can continue to push the push plate 17 to squeeze the airbag 16.

[0051] In another embodiment, the air inlet pipe 20 is also provided with a valve on the side wall outside the reaction chamber 1. The valve is used to control the opening or closing of the air inlet pipe 20. When the valve closes the air inlet pipe 20, outside air will not be able to enter the air bag 16, and the air bag 16 will not be able to bubble and dissipate heat into the reaction chamber 1.

[0052] The reaction chamber 1 is also provided with an elastic element 18, one end of which is fixed to the installation cavity and the other end is connected to the push plate 17.

[0053] In this embodiment, in order to ensure that the airbag 16 can quickly recover its deformation, an elastic element 18 is also provided. The elastic element 18 is a spring, which ensures that the airbag 16 can quickly recover its deformation.

[0054] In another embodiment, a one-way valve is also provided in the vent on the stirring plate 7 to prevent wastewater in the reaction tank 1 from flowing back through the vent.

[0055] In another embodiment, the reaction chamber 1 is also equipped with a thermometer, which can detect the temperature of the wastewater in the reaction chamber in real time, thereby controlling the temperature in the reaction chamber 1 to the optimal reaction temperature range.

[0056] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A microwave catalytic Fenton synergistic reaction device for organic wastewater treatment, comprising a reaction box (1), a microwave generator is arranged on the reaction box (1) for generating a microwave field in the reaction box (1), characterized in that, The reaction box (1) is further provided with a driving mechanism (5) and an air pump (9), the stirring shaft (8) of the driving mechanism (5) extends into the reaction box (1), the stirring blade (7) is arranged on the stirring shaft (8), a plurality of air holes are arranged on the stirring blade (7), and the air pump (9) is communicated with the air holes.

2. The microwave catalytic Fenton synergistic reaction device for organic wastewater treatment according to claim 1, characterized in that, The top of the reaction box (1) is provided with a box cover (6), the driving mechanism (5) is fixed on the box cover (6), and the stirring shaft (8) extends into the reaction box (1) through the box cover (6).

3. The microwave catalytic Fenton synergistic reaction device for organic wastewater treatment according to claim 1, characterized in that, The stirring shaft (8) is internally provided with a cavity (12), the cavity (12) is communicated with the air holes on the stirring blade (7), and the cavity (12) is communicated with the bottom end of the stirring shaft (8); The inner bottom of the reaction box (1) is further provided with a movable shaft (10), the movable shaft (10) can rotate around its own axis in the reaction box (1), the top of the movable shaft (10) is provided with a mounting hole (13) with an inner diameter consistent with the outer diameter of the stirring shaft (8), the mounting hole (13) is communicated with the air pump (9), and the bottom end of the movable shaft (10) is located in the mounting hole (13).

4. The microwave catalytic Fenton synergistic reaction device for organic wastewater treatment according to claim 3, characterized in that, The mounting hole (13) of the movable shaft (10) is further provided with a limiting groove (15), the limiting groove (15) is communicated with the top of the movable shaft (10), the side wall of the stirring shaft (8) is further provided with a limiting ball (11), and the limiting ball (11) is located in the limiting groove (15).

5. The microwave catalytic Fenton synergistic reaction device for organic wastewater treatment according to claim 1, characterized in that, The stirring blade (7) is two, and the two stirring blades (7) are located on different axial directions of the stirring shaft (8).

6. The microwave catalytic Fenton synergistic reaction device for organic wastewater treatment according to claim 1, characterized in that, The reaction box (1) is further provided with a mounting cavity, the mounting cavity is distributed along the circumference of the reaction box (1), and the mounting cavity is provided with an air bag (16); The movable end of the air bag (16) is provided with an elastic push plate (17), one end of the push plate (17) is connected with the air bag (16), and the other end extends into the reaction box (1) along the radial direction of the reaction box (1); the stirring blade (7) and the push plate (17) are located in the same horizontal plane; The length of the push plate (17) extending into the reaction box (1) is greater than the distance between the end of the stirring blade (7) and the inner wall of the reaction box (1); The push plate (17) is further provided with an air hole (19) communicated with the air bag (16).

7. The microwave catalytic Fenton synergistic reaction device for organic wastewater treatment according to claim 6, characterized in that, The side wall of the reaction box (1) is further provided with a strip-shaped groove, the strip-shaped groove is distributed along the circumference of the reaction box (1) and communicated with the mounting cavity, and the push plate (17) is located in the strip-shaped groove. 8.The microwave catalytic Fenton synergistic reaction device for organic wastewater treatment according to claim 6, characterized in that, The outer surface of the reaction box (1) is further provided with an air inlet pipe (20) communicated with the air bag (16), and the air inlet pipe (20) and the air hole (19) are both provided with a one-way valve. 9.The microwave catalytic Fenton synergistic reaction device for organic wastewater treatment according to claim 6, characterized in that, The mounting cavity of the reaction box (1) is further provided with an elastic member (18), one end of the elastic member (18) is fixed with the mounting cavity, and the other end is connected with the push plate (17).

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