Tubular reactor for catalytic oxidation degradation of wastewater

Abstract

The invention discloses a tubular reactor for catalytic oxidation degradation of wastewater, an annular degradation pipe is arranged on a water inlet pipe, and an inner cavity of the degradation pipe is divided into four independent degradation chambers through four pushing plates, so that when the four pushing plates move, catalyst particles in the degradation chambers can be pushed to perform circumferential transposition, and the degradation effect is improved. Wastewater enters the single degradation chamber and is pushed to move circumferentially along with the catalyst particles, the contact time of the catalyst particles in the single degradation chamber and the wastewater is prolonged, the pushed catalyst particles roll and make efficient contact with the wastewater, and therefore the degradation effect in unit time is improved.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and in particular to a tubular reactor for catalytic oxidation degradation of wastewater. Background Technology

[0002] Water is the source of life. With industrial development, the discharge of large amounts of wastewater has led to severe water pollution problems. my country's water pollution control faces challenges such as a wide variety of pollutants, large polluted areas, the difficulty in treating some pollutants, and high treatment costs. In addition to formulating a series of environmental protection regulations to reduce pollution emissions, measures should also be taken to improve wastewater treatment efficiency. Water pollution control is a long-term and arduous task. With the increasing severity of environmental problems, the development of efficient and environmentally friendly water treatment materials has become a current research hotspot.

[0003] Among them, the catalytic oxidation and degradation of wastewater using catalyst particles is a popular research direction. This treatment method is mostly carried out through tubular reactors to obtain experimental data.

[0004] Tubular reactors form catalytic units by accumulating catalyst particles in pipes. Heating, flow control, and gas input units are added according to experimental requirements to provide reaction variables. Wastewater and oxidant are mixed in proportion and fed into the pipe, passing through the catalytic units for treatment before being discharged. However, existing tubular reactors, in order to ensure the flow rate of wastewater and the reaction effect, have a small amount of catalyst particles in a single catalytic unit. Multiple catalytic units need to be installed in the pipe. Furthermore, the contact time between wastewater and a single catalytic unit is short, and the reaction time is also short. At the same time, due to the accumulation state, the catalyst particles are prone to progressive clogging problems during short-term contact reactions. Summary of the Invention

[0005] This application proposes a tubular reactor for catalytic oxidation degradation of wastewater, which has the advantages of extending the reaction time of wastewater by forming a ring-shaped degradation tube, promoting thorough mixing of wastewater and catalyst particles by a pusher plate, changing the position of catalyst particles above by intermittent up-and-down movement of a support mesh plate, changing the position of catalyst particles and wastewater below by intermittent up-and-down movement of a piston, and causing the wastewater and catalyst particles on both sides to collide and disturb the catalyst particles and wastewater in the degradation chamber. The collided wastewater and catalyst particles impact the elastic rope and pull the spiral scraper in other degradation chambers to stir the surrounding wastewater and catalyst particles. This solves the problems of increased cost due to the multi-layer arrangement of catalytic units in existing tubular reactors for catalytic oxidation degradation of wastewater, ineffective degradation treatment due to rapid passage of wastewater through the catalytic units, and progressive blockage caused by catalyst particle accumulation.

[0006] To achieve the above objectives, this application adopts the following technical solution: a tubular reactor for catalytic oxidation degradation of wastewater, comprising a drive shaft providing power and an annular degradation tube outside the drive shaft; the degradation tube includes a lower annular tube at the bottom, an upper annular tube symmetrically arranged above, and a collar connected to the drive shaft on the inner side by evenly distributed connecting rods; four circumferentially evenly distributed push plates are arranged on the side of the collar facing the inner cavity of the degradation tube, and a degradation chamber is formed between adjacent push plates; an inlet pipe is arranged on one side of the bottom of the degradation tube, and a bearing mesh plate is arranged at the top opening of the inlet pipe for inputting wastewater into the degradation tube; a drainage mesh plate is arranged on the bottom side of the degradation tube away from the inlet pipe for prolonging the reaction time of wastewater in the degradation tube, and a collection box is arranged at the bottom of the drainage mesh plate, with a drainage pipe arranged at the center of the bottom of the collection box.

[0007] Preferably, the bottom and top ends of the collar are provided with annular sealing protrusions, and the connection between the lower and upper ring tubes and the collar is provided with annular sliding grooves. The sealing protrusions are movably fitted into the sliding grooves to ensure that no liquid leakage occurs when the collar rotates.

[0008] Preferably, the pusher plate is circular, and the circumferential sidewall of the pusher plate is attached to the inner sidewall of the degradation tube to separate individual degradation chambers. Three-quarters of the space of the degradation chamber is filled with catalyst particles to provide sufficient space for the catalyst particles to move.

[0009] Preferably, the bottom and top of the push plate are respectively provided with symmetrical active magnet I and active magnet II.

[0010] Preferably, the top of the inner wall of the water inlet pipe is provided with an annular mounting ring, the top of the mounting ring is provided with a spring I connected to the bottom of the bearing mesh plate, and the top of the bearing mesh plate is provided with a passive magnet I that repels the active magnet I.

[0011] Preferably, the top end of the degradation tube is provided with an extension tube, a piston is provided inside the extension tube, a spring II is provided between the top end of the piston and the top end of the inner cavity of the extension tube, and a passive magnet II that repels the active magnet II is fixedly connected to the bottom end of the piston.

[0012] Preferably, the extension pipe is located directly above the inlet pipe, so that the upward-flowing wastewater and degradation particles can be flushed against the downward-flowing wastewater and degradation particles.

[0013] Preferably, an elastic rope is provided inside the degradation tube, passing through the center of the four push plates, and four evenly distributed positioning blocks are provided on the elastic rope, which are attached to one side of the push plate.

[0014] Preferably, a spiral scraper is provided on the elastic rope between adjacent push plates, with the lowest end of the spiral scraper close to the bottom of the inner cavity of the lower ring pipe, for stirring the surrounding catalyst particles and wastewater during the oscillation process.

[0015] This application provides a tubular reactor for catalytic oxidation and degradation of wastewater. An annular degradation tube is installed on the inlet pipe, and four push plates divide the inner cavity of the degradation tube into four separate degradation chambers. When the four push plates move, they can push the catalyst particles within the degradation chambers to undergo circumferential displacement. Wastewater enters a single degradation chamber and is pushed along with the catalyst particles, extending the contact time between the catalyst particles and the wastewater within each chamber. This allows the pushed catalyst particles to roll and make efficient contact with the wastewater, thereby improving the degradation effect per unit time.

[0016] Simultaneously, when the push plate rotates between the inlet pipe and the extension pipe, the active magnet I will repel the passive magnet I, causing the lower support mesh plate to move downwards. This creates an empty space between the support mesh plate and the connection between the lower ring pipe and the inlet pipe, allowing the catalyst particles on both sides of the push plate to fall into this empty space. As the push plate gradually moves away, spring I will push the support mesh plate, causing the catalyst particles in the upper empty space to surge upwards and enter the next degradation chamber. This causes the catalyst particles in the degradation chamber to scatter and tumble under the surging force, thereby agitating the accumulated catalyst particles, increasing the contact between the catalyst particles and the wastewater, avoiding the problem of uneven temperature caused by local temperature accumulation, and enhancing the reaction effect and uniformity.

[0017] Simultaneously, when the push plate rotates between the inlet pipe and the extension pipe, the active magnet II will repel the passive magnet II, causing the piston above to move upward, forming an upward suction force. Combined with the upward flow of wastewater, this draws some catalyst particles into the extension pipe. As the push plate gradually moves away, the spring II will push the piston downward, causing the drawn-up wastewater and catalyst particles to be quickly pushed into the degradation chamber below. At this time, the upward-flowing wastewater and catalyst particles will collide with the downward-flowing wastewater and catalyst particles, making the wastewater and catalyst particles at the collision position more chaotic, further increasing the turbulence of the wastewater in the degradation chamber, and working with the chaotic catalyst particles for efficient degradation.

[0018] At the same time, the flushed wastewater and catalyst particles will impact the elastic ropes in this degradation chamber, causing the elastic ropes to vibrate and transmit the vibration to the elastic ropes in other degradation chambers. This causes the elastic ropes in other degradation chambers to also vibrate, so that the degradation chambers that are not connected to the water inlet pipe can drive the spiral scraper to swing under the vibration of the elastic ropes, stirring the surrounding wastewater and catalyst particles, thereby improving the degradation effect in this degradation chamber. Attached Figure Description

[0019] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.

[0020] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the distribution of the push plate structure of the present invention; Figure 4 This is a schematic diagram of the degradation tube structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the water inlet pipe and extension pipe of the present invention; Figure 6 This is a schematic diagram showing the structural distribution of the elastic rope and spiral scraping net of the present invention.

[0021] The components are as follows: 1. Lower ring pipe; 2. Upper ring pipe; 21. Slide groove; 3. Inlet pipe; 31. Mounting ring; 32. Spring I; 33. Bearing mesh plate; 34. Passive magnet I; 4. Extension pipe; 41. Spring II; 42. Piston; 43. Passive magnet II; 5. Drainage mesh plate; 51. Collection box; 52. Drainage pipe; 6. Drive shaft; 61. Connecting rod; 7. Collar; 71. Sealing protrusion; 8. Push plate; 81. Active magnet I; 82. Active magnet II; 9. Elastic rope; 91. Positioning block; 92. Spiral scraper. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] Example 1 Please see Figures 1 to 2 A tubular reactor for catalytic oxidation and degradation of wastewater includes an annular degradation tube and a drive shaft 6 located at the center of the annulus for transmitting power from a motor to a connected collar 7.

[0024] See Figures 1 to 2The degradation tube consists of a lower ring tube 1, an upper ring tube 2 symmetrically arranged above, and an inner collar 7. The lower ring tube 1 and the upper ring tube 2 are fixed together by bolts, which allows the degradation tube to be quickly disassembled and installed. This enables the rapid replacement of catalyst particles inside the degradation tube and allows for easy and quick disassembly for repair or replacement when internal components malfunction.

[0025] See Figures 2 to 4 The bottom and top of the collar 7 are provided with annular sealing protrusions 71. The lower ring pipe 1 and the upper ring pipe 2 are respectively provided with annular sliding grooves 21 at the connection with the collar 7. The sealing protrusions 71 are movably fitted in the sliding grooves 21. A sealing rubber ring is provided on the sealing protrusions 71, so that the cooperation between the sealing protrusions 71 and the sliding grooves 21 can prevent the leakage of liquid in the degradation pipe while ensuring the normal rotation of the collar 7.

[0026] See Figures 2 to 3 Four circumferentially distributed push plates 8 are fixedly connected to one side of the collar 7 facing the inner cavity of the degradation tube. When the collar 7 rotates under the drive of the transmission shaft 6, it can drive the four push plates 8 to rotate synchronously in the degradation tube. The push plates 8 are circular plates, and the circumferential sidewalls of the push plates 8 are in contact with the inner sidewalls of the degradation tube. When the push plates 8 rotate in the circumferential direction, they can push the catalyst particles and wastewater in the rotation direction to move in the circumferential direction.

[0027] See Figure 2 A degradation chamber is formed between adjacent push plates 8. Three-quarters of the space in the degradation chamber is filled with catalyst particles, which allows the push plates 8 to rotate circumferentially and push these catalyst particles to roll synchronously. The catalyst particles that are not completely filled in the degradation chamber have more room to move when pushed. The catalyst particles that are close to the push plates 8 are more likely to stack upwards and form a slope. At this time, the catalyst particles will tend to roll down. Also, because the push plates 8 are rotating in a circle, the catalyst particles being pushed also tend to move away from the center. This accumulation and movement of catalyst particles increases the flow resistance between wastewater and catalyst particles. Wastewater in different areas can come into direct contact with more catalyst particles that have changed positions when flowing, thereby improving the degradation effect.

[0028] See Figures 1 to 2 , Figures 4 to 5 A water inlet pipe 3 is fixedly connected to one side of the bottom end of the degradation pipe. A support mesh plate 33 is movably sleeved at the top opening of the water inlet pipe 3. The circumferential side wall of the support mesh plate 33 is in contact with the inner side wall of the water inlet pipe 3, so that the wastewater can pass through the support mesh plate 33 and enter the degradation pipe to directly contact the catalyst particles for degradation treatment.

[0029] See Figure 2 , Figure 4A drainage mesh plate 5 is fixedly sleeved at the bottom end of the degradation pipe on the side away from the inlet pipe 3. A collection box 51 is fixedly connected to the bottom end of the drainage mesh plate 5. A drainage pipe 52 is fixedly connected to the center of the bottom end of the collection box 51. This allows the wastewater entering the degradation chamber to undergo a longer degradation treatment before rotating circumferentially to the position of the drainage mesh plate 5 after leaving the inlet pipe 3, thus extending the degradation treatment time of wastewater per unit volume.

[0030] When the moving degradation chamber reaches the position of the drainage mesh plate 5, the treated water in the degradation chamber will pass downward through the drainage mesh plate 5. At this time, the wastewater in the degradation chamber also needs to pass downward through the catalyst particles piled below, and undergo another downward contact degradation treatment. After the treated water enters the collection box 51, it is discharged through the drainage pipe 52.

[0031] See Figures 1 to 3 Connecting rods 61 are fixedly connected to the top four sides of the drive shaft 6. The end of the connecting rod 61 away from the drive shaft 6 is fixedly connected to the side of the collar 7 facing the drive shaft 6, so that the drive shaft 6 can transmit power to the collar 7 through the connecting rods 61, so that the collar 7 drives the four push plates 8 to rotate continuously in the degradation tube.

[0032] Example 2 Please see Figures 2 to 5 Based on Embodiment 1, an active magnet I 81 is fixedly connected to the bottom of the push plate 8, and an active magnet II 82 is fixedly connected to the top of the push plate 8.

[0033] See Figure 2 , Figure 5 An annular mounting ring 31 is fixedly sleeved on the top of the inner wall of the water inlet pipe 3. A spring I 32 is fixedly connected to the top of the mounting ring 31. The top of the spring I 32 is fixedly connected to the bottom of the bearing mesh plate 33. A passive magnet I 34 that repels the active magnet I 81 is fixedly connected to the top of the bearing mesh plate 33.

[0034] When the push plate 8 rotates above the inlet pipe 3, the active magnet I 81 will repel the passive magnet I 34, causing the lower support mesh plate 33 to move downwards and compress the spring I 32. This creates a downward empty space between the support mesh plate 33 and the connection between the lower ring pipe 1 and the inlet pipe 3, allowing the catalyst particles on both sides of the push plate 8 to fall into this empty space. As the push plate 8 moves further away, the spring I 32 will push the support mesh plate 33, causing the catalyst particles in the upper empty space to surge upwards and enter the next degradation chamber. This causes the catalyst particles in the degradation chamber to scatter and tumble under the surging catalyst particles and wastewater, thereby agitating the accumulated catalyst particles, increasing the contact between the catalyst particles and the wastewater, avoiding the problem of uneven temperature caused by local temperature accumulation, and enhancing the reaction effect and uniformity.

[0035] See Figure 2 , Figure 5 An extension tube 4 is fixedly connected to the top of the degradation tube. A spring II 41 is fixedly connected to the top of the inner cavity of the extension tube 4. A piston 42 is fixedly connected to the bottom of the spring II 41. A passive magnet II 43, which repels the active magnet II 82, is fixedly connected to the bottom of the piston 42.

[0036] When the push plate 8 rotates to below the extension tube 4, the active magnet II 82 will repel the passive magnet II 43, causing the piston 42 above to move upward, forming an upward suction force. Combined with the upward flow of wastewater, a portion of the catalyst particles are drawn into the extension tube 4. As the push plate 8 gradually moves away, the spring II 41 will push the piston 42 downward, causing the drawn-up wastewater and catalyst particles to be quickly pushed into the degradation chamber below, impacting the catalyst particles accumulated below and changing the direction of the wastewater flow below. This causes the impacted catalyst particles to roll in all directions, making full contact with the flowing wastewater.

[0037] See Figures 1 to 2 , Figures 4 to 5 The extension pipe 4 is located directly above the inlet pipe 3, which allows the upward-rushing wastewater and catalyst particles to collide with the downward-rushing wastewater and catalyst particles, making the wastewater and catalyst particles at the collision position more chaotic, further increasing the turbulence of the wastewater in the degradation chamber at this time, and working with the chaotic catalyst particles to achieve efficient degradation.

[0038] Example 3 Please see Figure 6 Based on Example 2, an elastic rope 9 is movably sleeved inside the degradation tube. The elastic rope 9 passes through the center of the four push plates 8. Four evenly distributed positioning blocks 91 are fixedly sleeved on the elastic rope 9. One side of the positioning block 91 is attached to one side of the push plate 8. The positioning block 91 is located on one side of the push plate 8 in the circumferential rotation direction, so that when the push plate 8 rotates in the circumferential direction, it can pull the elastic rope 9 to rotate in the same direction by pushing the positioning block 91.

[0039] See Figure 6A spiral scraper 92 is fixedly connected to the elastic rope 9 between adjacent push plates 8. The spiral scraper 92 is made of lightweight spiral rope. The bottom end of the spiral scraper 92 is close to the bottom of the inner cavity of the lower ring pipe 1, so that the wastewater and catalyst particles flushed at the extension pipe 4 and the water inlet pipe 3 will impact the elastic rope 9 in this degradation chamber, causing the elastic rope 9 to vibrate and transmit to the elastic ropes 9 in other degradation chambers. This causes the elastic ropes 9 in other degradation chambers to also vibrate, so that the degradation chambers not connected to the water inlet pipe 3 can drive the spiral scraper 92 to swing under the vibration of the elastic rope 9, stirring the surrounding wastewater and catalyst particles, improving the degradation effect in this degradation chamber, and avoiding the degradation chambers that leave the extension pipe 4 and the water inlet pipe 3, because the movement mode of the wastewater and catalyst particles inside is singular, which cannot meet the problem of efficient contact.

Claims

1. A tubular reactor for catalytic oxidative degradation of wastewater, characterized by, The transmission shaft (6) and the annular degradation tube outside the transmission shaft (6) are provided with power; The degradation tube comprises a lower annular tube (1), an upper symmetrical annular tube (2), and a sleeve ring (7) connected by uniformly distributed connecting rods (61) and the transmission shaft (6) inside; The sleeve ring (7) is provided with four circumferentially distributed push plates (8) on the side facing the inner cavity of the degradation tube, and a degradation chamber is formed between adjacent push plates (8). The bottom end of the degradation tube is provided with a water inlet pipe (3), and the top end opening of the water inlet pipe (3) is provided with a bearing mesh plate (33) for inputting wastewater into the degradation tube. The bottom end of the degradation tube away from the water inlet pipe (3) is provided with a drainage mesh plate (5) for prolonging the reaction time of wastewater in the degradation tube, and the bottom end of the drainage mesh plate (5) is provided with a converging box (51), and the bottom end of the converging box (51) is provided with a drainage pipe (52).

2. The tubular reactor for catalytic oxidative degradation of wastewater according to claim 1, characterized in that, The bottom end and the top end of the sleeve ring (7) are provided with annular sealing protrusions (71), and the connection parts of the lower annular tube (1) and the upper annular tube (2) and the sleeve ring (7) are respectively provided with annular sliding grooves (21), and the sealing protrusions (71) are movably sleeved in the sliding grooves (21), so as to prevent liquid leakage when the sleeve ring (7) rotates.

3. The tubular reactor for catalytic oxidative degradation of wastewater according to claim 1, characterized in that, The push plate (8) is in the shape of a circular plate, and the circumferential side wall of the push plate (8) is attached to the inner side wall of the degradation tube for separating individual degradation chambers, and three-quarters of the space of the degradation chamber is filled with catalyst particles to provide sufficient movement space for the catalyst particles.

4. The tubular reactor for catalytic oxidative degradation of wastewater according to claim 3, characterized in that, The bottom and top of the push plate (8) are respectively provided with symmetrical active magnets I (81) and active magnets II (82).

5. The tubular reactor for catalytic oxidative degradation of wastewater according to claim 4, characterized in that, The inner side wall of the water inlet pipe (3) is provided with an annular mounting ring (31) at the top, the top end of the mounting ring (31) is provided with a spring I (32) connected with the bottom end of the bearing mesh plate (33), and the top end of the bearing mesh plate (33) is provided with a passive magnet I (34) repelling the active magnet I (81).

6. The tubular reactor for catalytic oxidative degradation of wastewater according to claim 5, characterized in that, The top end of the degradation tube is provided with an extension pipe (4), the extension pipe (4) is provided with a piston (42), a spring II (41) is arranged between the top end of the piston (42) and the inner cavity top end of the extension pipe (4), and the bottom end of the piston (42) is fixedly connected with a passive magnet II (43) repelling the active magnet II (82).

7. The tubular reactor for catalytic oxidative degradation of wastewater according to claim 6, characterized in that, The extension pipe (4) is located directly above the water inlet pipe (3), so that the upwelling wastewater and degradation particles can collide with the downwelling wastewater and degradation particles.

8. The tubular reactor for catalytic oxidative degradation of wastewater according to claim 1, characterized in that, The degradation tube is provided with an elastic rope (9) penetrating the center of the four push plates (8), and the elastic rope (9) is provided with four evenly distributed positioning blocks (91) attached to one side of the push plate (8).

9. The tubular reactor for catalytic oxidative degradation of wastewater according to claim 8, characterized in that, The elastic rope (9) between adjacent push plates (8) is provided with a spiral scraper (92), and the lowermost end of the spiral scraper (92) is close to the inner cavity bottom end of the lower annular tube (1), so as to stir the surrounding catalyst particles and wastewater in the process of swinging.

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