Self-adaptive internal circulation wet oxidation wastewater treatment device

Abstract

The invention relates to the technical field of wastewater treatment, and discloses a self-adaptive internal circulation wet oxidation wastewater treatment device which comprises a main reactor and a guide cylinder which are vertically arranged, the guide cylinder is arranged in the middle of the main reactor, a liquid collection opening is formed in the top end of the guide cylinder, and a backflow enhancing baffle is installed on the inner wall of the main reactor. The preheated wastewater is fed into the guide cylinder from the liquid collecting port to form a high-speed jet flow, the high-speed jet flow impacts on the microbubble mixing assembly located at the bottom end of the guide cylinder, and the impacted gas-liquid mixture flows upwards between the inner wall of the main reactor and the outer wall of the guide cylinder. And the gas is discharged from a gas-liquid outlet at the top end of the main reactor. By optimizing the internal structure of an existing reactor, spontaneous mixing of high-temperature low-concentration wastewater and low-temperature high-concentration raw water is achieved, the initial reaction temperature is remarkably increased, the oxidation reaction rate is increased, and the coking problem caused by local high concentration is avoided. The retention time of the wastewater in the reactor is further prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a device for treating wastewater by adaptive internal circulation wet oxidation. Background Art

[0002] Wet oxidation technology is an efficient and environmentally friendly wastewater treatment method suitable for treating high COD (10-100g / L) wastewater. Under high temperature (200-325℃) and high pressure (5-15MPa) conditions, the technology uses air to oxidize organic matter or reducible substances in wastewater to generate carbon dioxide and water. No secondary pollutants such as NOx, SO2, HCl, dioxins, furans and fly ash are produced during the wet oxidation process. When treating wastewater with a COD higher than 20,000mg / L, the wet oxidation reaction can be self-sustaining and can output excess energy to further improve economic benefits. Due to its high efficiency and economy, wet oxidation technology is widely regarded as a green and environmentally friendly wastewater treatment technology, especially suitable for treating high-salt, high-concentration, and difficult-to-biodegrade wastewater.

[0003] Although wet oxidation technology has significant advantages, it still faces some challenges in practical engineering applications. When the concentration of organic matter is too high (5w~20w), the wet oxidation reaction is prone to cause polymerization and coking, generating organic polymers similar to tar, which are difficult to completely decompose and have unreduced toxicity. At the same time, the local increase in viscosity will affect the heat transfer effect, and "hot spots" are easily formed near the reactor wall, which may lead to thermal runaway of the reactor, thereby increasing operational risks. Therefore, there is an urgent need for an adaptive internal circulation wet oxidation device for treating wastewater that can at least partially solve the above problems. Summary of the invention

[0004] To achieve the above-mentioned purpose, the present invention discloses an adaptive internal circulation wet oxidation device for treating wastewater, comprising: a main reactor and a guide tube arranged vertically, the guide tube is centrally arranged in the main reactor, the liquid collecting port is located at the top of the guide tube, the reflux enhancement baffle is installed on the inner wall of the main reactor and is located above the liquid collecting port, the preheated wastewater is sent into the guide tube from the liquid collecting port, and after forming a high-speed jet, it impacts on the microbubble mixing component located at the bottom end of the guide tube, and the gas-liquid mixture after the impact flows upward between the inner wall of the main reactor and the outer wall of the guide tube, and is sent out from the gas-liquid outlet located at the top of the main reactor.

[0005] Preferably, a liquid discharge port is installed at the bottom end of the main reactor, and a raw water inlet is installed at the side end of the main reactor near the top end. The preheated wastewater is fed into the raw water inlet, and after passing through the reflux enhancement baffle, it is fed into the guide tube from the liquid collecting port through the raw water inlet injector to form a high-speed jet. The liquid injection speed of the raw water inlet injector is 2.5-10m / s. A gas inlet for supplying gas to the microbubble mixing assembly is installed at the side end of the main reactor near the bottom end.

[0006] Preferably, the diameter of the main reactor is 0.6-1.2 m, the height of the main reactor is 10-22 m, the height of the draft tube accounts for 60%-80% of the height of the main reactor, and the diameter of the draft tube accounts for 10%-30% of the diameter of the main reactor.

[0007] Preferably, a plurality of groups of guide baffles are installed from bottom to top on the inner wall of the main reactor to prevent the backflow of the gas-liquid mixture.

[0008] Preferably, the sieve plate is sleeved on the guide tube and connected to the inner wall of the main reactor. The sieve plate is 1-2m above the gas inlet. The opening rate of the sieve plate is 20%-50%. The gas-liquid mixture is evenly mixed through the sieve plate.

[0009] Preferably, the microbubble mixing component includes: a circulating liquid disperser, an aeration ring and an air intake circulation baffle, the circulating liquid disperser is installed at the bottom end of the guide tube, the aeration ring is located below the circulating disperser, the gas inlet is connected to the aeration ring, and a plurality of air outlets are distributed in a circular array on the aeration ring. The air outlets spray out air columns, and the dispersion port of the circulating liquid disperser impacts the high-speed jet onto the air column to form a mixture of microbubbles and wastewater. The air intake circulation baffle is distributed above the air outlet to extend the residence time of the mixed liquid.

[0010] Preferably, the dispersion port angle of the circulating liquid disperser is 30-60°, and the liquid collection port angle is 60-75°.

[0011] Preferably, the reflux enhancement baffle is rotatably mounted on the inner wall of the main reactor through a side mounting shaft, and two inclined guide plates are installed on the reflux enhancement baffle near the liquid collection port end. The main reactor is also equipped with a posture adjustment component for adjusting the flip angle of the reflux enhancement baffle, and the posture adjustment component is also used to adjust the inclination angle of the inclined guide plate. The posture adjustment component includes: a side opening opened on the main reactor, a side slide card clamped on the side opening, a spherical rotating block rotatably mounted on the side slide card, a rotating rod is passed through the spherical rotating block, and is connected to a transmission box installed on the reflux enhancement baffle end away from the liquid collection port.

[0012] Preferably, the top and bottom ends of the side slide are provided with internal snap-ons, the internal snap-ons are arranged at the top and bottom ends of the side opening, the side slide is sealed at the side opening, an electric telescopic rod is installed at the side end of the main reactor, the electric telescopic rod is located below the side opening, and the output end of the electric telescopic rod is connected to the side slide.

[0013] Preferably, a central gear disc is provided in the transmission box, a rotating rod extends into the transmission box and is connected to the central gear disc, two sets of transverse racks arranged in parallel are located in the transmission box and mesh with the central gear disc, the middle section of the inclined guide plate is rotatably installed on the reflux enhancement baffle near the liquid collection port end through the central mounting shaft, and the back side of the inclined guide plate is symmetrically provided with limit slides with the central mounting shaft as the center, the limit slider is slidably connected in the limit slide, the limit slider is connected to the transverse rack, and an avoidance hole is opened on the reflux enhancement baffle to facilitate the lateral sliding of the limit slider.

[0014] Preferably, the posture adjustment component also includes: an adjustment dial rotatably installed on the side end of the main reactor, the adjustment dial is located above the side opening, a telescopic rod is installed on the end of the rotating rod away from the transmission box, an adjustment screw is installed on the end of the telescopic rod away from the rotating rod, an adjustment groove is opened on the adjustment dial for facilitating the insertion of the adjustment screw, the groove direction of the adjustment groove points to the center end of the adjustment dial, a fastening nut is installed on the adjustment screw and is clamped on the adjustment groove, and a locking assembly for locking the adjustment dial is also installed on the main reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 is an outline diagram of the aeration ring of the present invention;

[0018] Figure 3 It is a schematic diagram of assembling the posture adjustment assembly and the backflow enhancement baffle of the present invention;

[0019] Figure 4 The attitude adjustment assembly and the backflow enhancement baffle of the present invention are cross-sectional views. Figure 1 ;

[0020] Figure 5 for Figure 4 The enlarged schematic diagram of the middle label A (the electric telescopic rod is in the extended state);

[0021] Figure 6 The attitude adjustment assembly and the backflow enhancement baffle of the present invention are cross-sectional views. Figure 2 (The electric telescopic rod is in the retracted state);

[0022] Figure 7 The backflow enhancement baffle of the present invention is far away from the transmission box end structure schematic diagram Figure 1;

[0023] Figure 8 The backflow enhancement baffle of the present invention is far away from the transmission box end structure schematic diagram Figure 2 .

[0024] In the figure: 1. gas-liquid outlet; 2. raw water inlet; 3. reflux enhancement baffle; 4. raw water inlet ejector; 5. liquid collecting port; 6. drainage baffle; 7. guide tube; 8. main reactor; 9. sieve plate; 10. air intake circulation baffle; 11. circulating liquid disperser; 12. gas inlet; 13. aeration ring; 14. liquid discharge port; 15. gas outlet; 16. side mounting shaft; 17. oblique guide plate; 18. posture adjustment assembly; 19. side opening; 20. side slide plate; 21. spherical rotating block; 22. rotating rod; 23. transmission box; 24. electric telescopic rod; 25. center gear disc; 26. transverse rack; 27. center mounting shaft; 28. limit slide groove; 29. ​​limit slide block; 30. adjusting turntable; 31. telescopic rod; 32. adjusting screw; 33. fastening nut. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] like Figure 1 , Figure 2 As shown, the present embodiment provides an adaptive internal circulation wet oxidation device for treating wastewater, comprising: a main reactor 8 and a guide tube 7 arranged vertically, the guide tube 7 being centrally arranged in the main reactor 8, the liquid collecting port 5 being located at the top of the guide tube 7, the reflux enhancement baffle 3 being installed on the inner wall of the main reactor 8 and being located above the liquid collecting port 5, the preheated wastewater is sent into the guide tube 7 from the liquid collecting port 5, and after forming a high-speed jet, it impacts on the microbubble mixing assembly located at the bottom end of the guide tube 7, and the gas-liquid mixture after the impact flows upward between the inner wall of the main reactor 8 and the outer wall of the guide tube 7, and is sent out from the gas-liquid outlet 1 located at the top of the main reactor 8.

[0029] The working principle and beneficial effects of the above technical solution are:

[0030] The present invention provides an adaptive internal circulation wet oxidation device for treating wastewater. Preheated wastewater (i.e., low-temperature and high-concentration wastewater) is fed into a guide tube 7 through a liquid collecting port 5. When a high-speed jet is formed, a large amount of high-temperature and low-concentration treated wastewater located at the top of a main reactor 8 is introduced in cooperation with the liquid collecting port 5 and the reflux enhancement baffle 3 to mix spontaneously and flow downward together, and collide with a microbubble mixing component located at the bottom of the main reactor 8 to form a uniform gas-liquid mixture (i.e., a mixed flow of microbubbles and wastewater). The gas-liquid mixture after the collision flows upward between the inner wall of the main reactor 8 and the outer wall of the guide tube 7, and gathers in the high-temperature and low-concentration treated wastewater at the top of the main reactor 8. A part of the gas-liquid mixture is sent out from a gas-liquid outlet 1 located at the top of the main reactor 8, and the other part is introduced into the guide tube 7 again in cooperation with the liquid collecting port 5 and the reflux enhancement baffle 3 and flows downward together after spontaneous mixing along the high-speed jet. The present invention discloses an adaptive internal circulation wet oxidation device for treating wastewater. By optimizing the internal structure of the existing reactor, the device realizes the spontaneous mixing of high-temperature low-concentration wastewater and low-temperature high-concentration raw water, significantly increases the initial reaction temperature, accelerates the oxidation reaction rate, and avoids the coking problem caused by local high concentration. The design further prolongs the residence time of wastewater in the reactor, enhances the gas-liquid mixing efficiency, effectively improves the COD removal rate, and has significant industrial application value.

[0031] In this embodiment, a liquid discharge port 14 is installed at the bottom end of the main reactor 8, and a raw water inlet 2 is installed at the side end of the main reactor 8 near the top end. The preheated wastewater is fed into the raw water inlet 2, and after passing through the reflux enhancement baffle 3, it is fed into the guide tube 7 from the liquid collecting port 5 through the raw water inlet injector 4 to form a high-speed jet. The liquid injection speed of the raw water inlet injector 4 is 2.5-10m / s. A gas inlet 12 for supplying gas to the microbubble mixing assembly is installed at the side end of the main reactor 8 near the bottom end.

[0032] The working principle and beneficial effects of the above technical solution are:

[0033] The preheated wastewater (i.e., low-temperature and high-concentration wastewater) enters the guide tube 7 through the raw water inlet ejector 4 to form a high-speed jet. At the same time, a large amount of high-temperature and low-concentration treated wastewater located at the top of the main reactor 8 is introduced in conjunction with the liquid collecting port 5 and the reflux enhancement baffle 3 to spontaneously mix and flow downward together, and collide with the microbubble mixing component fed by the gas inlet 12 and the compressed air ejected by the microbubble mixing component at a high speed to form a uniform microbubble and wastewater mixed flow.

[0034] In this embodiment, the diameter of the main reactor 8 is 0.6-1.2m, the height of the main reactor 8 is 10-22m, the height of the guide tube 7 accounts for 60%-80% of the height of the main reactor 8, and the diameter of the guide tube 7 accounts for 10%-30% of the diameter of the main reactor 8.

[0035] In this embodiment, a plurality of groups of guide baffles 6 are installed from bottom to top on the inner wall of the main reactor 8 to prevent the backflow of the gas-liquid mixture.

[0036] The beneficial effects of the above technical solution are:

[0037] The gas-liquid mixture after the collision flows upward between the inner wall of the main reactor 8 and the outer wall of the guide tube 7, and the guide baffle 6 prevents the liquid from flowing back.

[0038] In this embodiment, the sieve plate 9 is sleeved on the guide tube 7 and connected to the inner wall of the main reactor 8. The sieve plate 9 is 1-2m above the gas inlet 12. The opening rate of the sieve plate 9 is 20%-50%. The gas-liquid mixture is evenly mixed after passing through the sieve plate 19.

[0039] The beneficial effects of the above technical solution are:

[0040] The gas-liquid mixture after the collision flows upward between the inner wall of the main reactor 8 and the outer wall of the guide tube 7 and is further mixed evenly through the sieve plate 9.

[0041] In this embodiment, the microbubble mixing component includes: a circulating liquid disperser 11, an aeration ring 13 and an intake circulation baffle 10. The circulating liquid disperser 11 is installed at the bottom end of the guide tube 7, the aeration ring 13 is located below the circulating disperser 11, the gas inlet 12 is connected to the aeration ring 13, and a plurality of air outlets 15 are distributed in a circular array on the aeration ring 13. The air outlet 15 sprays an air column. The dispersion port of the circulating liquid disperser 11 impacts the high-speed jet onto the air column to form a mixture of microbubbles and wastewater. The intake circulation baffle 10 is distributed above the air outlet 15 to extend the residence time of the mixed liquid.

[0042] The working principle and beneficial effects of the above technical solution are:

[0043] The preheated wastewater (i.e., low-temperature, high-concentration wastewater) enters the guide tube 7 through the raw water inlet ejector 4 to form a high-speed jet, and at the same time, cooperates with the liquid collecting port 5 and the reflux enhancement baffle 3 to introduce a large amount of high-temperature, low-concentration treated wastewater located at the top of the main reactor 8, and flows downward together after spontaneous mixing along the high-speed jet, and is dispersed out from the circulating liquid disperser 11. Compressed air is sent into the aeration ring 13 from the gas inlet 12, and is ejected from the gas outlet 15 to form an air column, and the wastewater from the dispersion port of the circulating liquid disperser 11 hits the air column at high speed to form a uniform micro-bubble and wastewater mixed flow. The air intake circulation baffle 10 prolongs the residence time of the mixed liquid.

[0044] In this embodiment, the angle of the dispersion port of the circulating liquid disperser 11 is 30-60°, and the angle of the liquid collection port 5 is 60-75°.

[0045] like Figures 3 to 8As shown, in the present embodiment, the reflux enhancement baffle 3 is rotatably mounted on the inner wall of the main reactor 8 via a side mounting shaft 16, and two inclined guide plates 17 are mounted on the end of the reflux enhancement baffle 3 near the liquid collecting port 5. The main reactor 8 is also provided with a posture adjustment component 18 for adjusting the flipping angle of the reflux enhancement baffle 3, and the posture adjustment component 18 is also used to adjust the inclination angle of the inclined guide plate 17. The posture adjustment component 18 includes: a side opening 19 opened on the main reactor 8, a side slide plate 20 clamped on the side opening 19, a spherical rotating block 21 rotatably mounted on the side slide plate 20, a rotating rod 22 is passed through the spherical rotating block 21, and is connected to a transmission box 23 mounted on the end of the reflux enhancement baffle 3 away from the liquid collecting port 5.

[0046] The working principle and beneficial effects of the above technical solution are:

[0047] The gas-liquid mixture after the collision flows upward between the inner wall of the main reactor 8 and the outer wall of the guide tube 7, and gathers in the high-temperature and low-concentration treated wastewater at the top of the main reactor 8. A part of it is sent out from the gas-liquid outlet 1 located at the top of the main reactor 8, and the other part is again introduced into the guide tube 7 in conjunction with the liquid collecting port 5 and the reflux enhancement baffle 3 and flows downward together after spontaneous mixing along the high-speed jet. For wastewater of different concentrations, temperatures and flow rates, the flipping angle of the reflux enhancement baffle 3 and the inclination angle of the inclined guide plate 17 are adjusted by the posture adjustment component 18. The greater the downward flipping angle of the reflux enhancement baffle 3, the more wastewater is introduced into the guide tube 7 in conjunction with the liquid collecting port 5 and the reflux enhancement baffle 3, and the greater the inclination angle of the inclined guide plate 17, the larger the rotating flow area of ​​the wastewater introduced into the guide tube 7 in conjunction with the liquid collecting port 5 and the reflux enhancement baffle 3, thereby increasing the mixing area, rotating flow, and promoting the mixing effect in the guide tube 7.

[0048] Specifically, when the concentration of low-temperature and high-concentration wastewater is higher, the temperature is lower, or the flow rate is larger, the residence time in the reactor needs to be extended, and the gas-liquid mixing efficiency is enhanced to improve the COD removal rate. When the side slide plate 20 slides downward on the side opening 19, it uses the cooperation of the spherical rotating block 21 and the rotating rod 22 to realize the upward flipping of the reflux enhancement baffle 3. Conversely, when the side slide plate 20 slides upward on the side opening 19, the reflux enhancement baffle 3 is flipped downward, and when the rotating rod 22 rotates, the inclination angle of the inclined guide plate 17 can be adjusted.

[0049] In this embodiment, the top and bottom ends of the side slide 20 are provided with internal snap-ons, and the internal snap-ons are clamped at the top and bottom ends of the side opening 19. The side slide 20 is sealed at the side opening 19. An electric telescopic rod 24 is installed at the side end of the main reactor 8. The electric telescopic rod 24 is located below the side opening 19, and the output end of the electric telescopic rod 24 is connected to the side slide 20.

[0050] The working principle and beneficial effects of the above technical solution are:

[0051] The side slide plate 20 is clamped at the top and bottom of the side opening 19 by means of the inner clamping holes at the top and bottom of the side slide plate 20. The side slide plate 20 can not only seal the side opening 19, but also slide up and down in the side opening 19. Figure 5 When the side slide plate 20 slides upward on the side opening 19, the backflow enhancement baffle 3 is turned downward. Figure 6 When the side slide plate 20 slides downward on the side opening 19 during the contraction, the backflow enhancement baffle 3 is flipped upward.

[0052] In this embodiment, a central gear disc 25 is provided in the transmission box 23, and the rotating rod 22 extends into the transmission box 23 and is connected to the central gear disc 25. Two sets of transverse racks 26 arranged in parallel are located in the transmission box 23 and mesh with the central gear disc 25. The middle section of the inclined guide plate 17 is rotatably installed on the end of the reflux enhancement baffle 3 close to the liquid collecting port 5 through the central mounting shaft 27. The back side of the inclined guide plate 17 is symmetrically provided with limiting slide grooves 28 with the central mounting shaft 27 as the center. The limiting slider 29 is slidably connected in the limiting slide groove 28. The limiting slider 29 is connected to the transverse rack 26. The reflux enhancement baffle 3 is provided with an avoidance hole for facilitating the lateral sliding of the limiting slider 29. The back side of the inclined guide plate 17 is the end of the inclined guide plate 17 close to the liquid collecting port 5.

[0053] The working principle and beneficial effects of the above technical solution are:

[0054] When the inclination angle of the inclined guide plate 17 needs to be adjusted, the rotating rod 22 is rotated, and the rotating rod 22 drives the central gear plate 25 located in the transmission box 23 to rotate, and the central gear plate 25 drives the two sets of transverse racks 26 meshed therewith to move synchronously in the direction of approaching or moving away from each other, and the transverse racks 26 drive the two inclined guide plates 17 to rotate synchronously around the central mounting shaft 27 through the cooperation of the limiting slider 29 and the limiting slide groove 28, such as Figure 7 As shown in FIG. 1 , when the two sets of transverse racks 26 are synchronously moving toward each other, the two inclined guide plates 17 tend to be in a vertical state, as shown in FIG. Figure 8 As shown, when the two sets of transverse racks 26 move away from each other synchronously, the two inclined guide plates 17 tend to be inclined.

[0055] In this embodiment, the posture adjustment component 18 also includes: an adjustment dial 30 rotatably installed on the side end of the main reactor 8, the adjustment dial 30 is located above the side opening 19, a telescopic rod 31 is installed at the end of the rotating rod 22 away from the transmission box 23, and an adjustment screw 32 is installed at the end of the telescopic rod 31 away from the rotating rod 22. An adjustment groove is opened on the adjustment dial 30 for the adjustment screw 32 to pass through, and the groove direction of the adjustment groove points to the center end of the adjustment dial 30. A fastening nut 33 is installed on the adjustment screw 32 and is clamped on the adjustment groove. A locking component for locking the adjustment dial 30 is also installed on the main reactor 8.

[0056] The working principle and beneficial effects of the above technical solution are:

[0057] After loosening the fastening nut 33 on each adjusting screw 32, first adjust the reflux enhancement baffle 3 to a suitable flipping angle by telescoping the electric telescopic rod 24. In this state, the rotating rod 22 and the adjusting screw 32 are both flipped coplanarly, and then the adjusting turntable 30 installed on the side end of the main reactor 8 is rotated. The telescopic rod 31 connected to the adjusting screw 32 and the rotating rod 22 connected to the telescopic rod 31 are driven to rotate by utilizing the cooperation of the adjusting groove and the adjusting screw 32. After the rotating rod 22 rotates, the two inclined guide plates 17 are driven to rotate synchronously around the central installation axis 27. After the inclined guide plates 17 are rotated to a suitable angle, the adjusting screw 32 can be clamped in the adjusting groove by the fastening nut 33, and the fixing of the adjusting turntable 30 on the main reactor 8 can be achieved by the locking assembly.

[0058] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An adaptive internal circulation wet oxidation device for treating wastewater, characterized in that: include: A main reactor (8) and a draft tube (7) are arranged vertically, the draft tube (7) is centrally arranged in the main reactor (8), a liquid collecting port (5) is located at the top of the draft tube (7), a reflux enhancement baffle (3) is installed on the inner wall of the main reactor (8) and is located above the liquid collecting port (5), the preheated wastewater is sent into the draft tube (7) from the liquid collecting port (5) to form a high-speed jet, and collides with a micro-bubble mixing component located at the bottom of the draft tube (7), and the gas-liquid mixture after the collision flows upward between the inner wall of the main reactor (8) and the outer wall of the draft tube (7), and is sent out from the gas-liquid outlet (1) located at the top of the main reactor (8).

2. The device for treating wastewater by adaptive internal circulation wet oxidation according to claim 1, characterized in that: A liquid discharge port (14) is installed at the bottom end of the main reactor (8), and a raw water inlet (2) is installed at the side end of the main reactor (8) near the top end. The preheated wastewater is fed in from the raw water inlet (2), and after passing through the reflux enhancement baffle (3), it is fed into the guide tube (7) from the liquid collecting port (5) through the raw water inlet ejector (4) to form a high-speed jet. The liquid ejection speed of the raw water inlet ejector (4) is 2.5-10 m / s. A gas inlet (12) for supplying gas to the microbubble mixing assembly is installed at the side end of the main reactor (8) near the bottom end.

3. The device for treating wastewater by adaptive internal circulation wet oxidation according to claim 1, characterized in that: The diameter of the main reactor (8) is 0.6-1.2 m, the height of the main reactor (8) is 10-22 m, the height of the draft tube (7) accounts for 60%-80% of the height of the main reactor (8), and the diameter of the draft tube (7) accounts for 10%-30% of the diameter of the main reactor (8).

4. The device for treating wastewater by adaptive internal circulation wet oxidation according to claim 1, characterized in that: A plurality of groups of guide baffles (6) are installed from bottom to top on the inner wall of the main reactor (8) to prevent the gas-liquid mixture from flowing back.

5. The device for treating wastewater by adaptive internal circulation wet oxidation according to claim 2, characterized in that: The sieve plate (9) is sleeved on the guide tube (7) and connected to the inner wall of the main reactor (8). The sieve plate (9) is 1-2 m above the gas inlet (12). The opening rate of the sieve plate (9) is 20%-50%. The gas-liquid mixture is evenly mixed through the sieve plate (19).

6. The device for treating wastewater by adaptive internal circulation wet oxidation according to claim 2, characterized in that: The microbubble mixing component comprises: a circulating liquid disperser (11), an aeration ring (13) and an air intake circulation baffle (10). The circulating liquid disperser (11) is installed at the bottom end of a guide tube (7). The aeration ring (13) is located below the circulating disperser (11). A gas inlet (12) is connected to the aeration ring (13). A plurality of air outlets (15) are distributed in a circular array on the aeration ring (13). The air outlets (15) spray out air columns. The dispersion ports of the circulating liquid disperser (11) collide high-speed jets onto the air columns to form a mixed liquid of microbubbles and wastewater. The air intake circulation baffle (10) is distributed above the air outlets (15) to extend the residence time of the mixed liquid.

7. The device for treating wastewater by adaptive internal circulation wet oxidation according to claim 1, characterized in that: The reflux enhancement baffle (3) is rotatably mounted on the inner wall of the main reactor (8) via a side mounting shaft (16); two oblique guide plates (17) are mounted on the end of the reflux enhancement baffle (3) close to the liquid collecting port (5); a posture adjustment component (18) for adjusting the flip angle of the reflux enhancement baffle (3) is also mounted on the main reactor (8); the posture adjustment component (18) is also used to adjust the inclination angle of the oblique guide plates (17); the posture adjustment component (18) comprises: a side opening (19) opened on the main reactor (8); a side slide plate (20) clamped on the side opening (19); a spherical rotating block (21) rotatably mounted on the side slide plate (20); a rotating rod (22) passing through the spherical rotating block (21) and connected to a transmission box (23) mounted on the end of the reflux enhancement baffle (3) away from the liquid collecting port (5).

8. The device for treating wastewater by adaptive internal circulation wet oxidation according to claim 7, characterized in that: The top and bottom ends of the side slide plate (20) are both provided with inner snap-fits, which are snap-fitted to the top and bottom ends of the side opening (19), and the side slide plate (20) is sealed to the side opening (19). An electric telescopic rod (24) is installed at the side end of the main reactor (8), and the electric telescopic rod (24) is located below the side opening (19). The output end of the electric telescopic rod (24) is connected to the side slide plate (20).

9. The device for treating wastewater by adaptive internal circulation wet oxidation according to claim 7, characterized in that: A central toothed disc (25) is arranged in the transmission box (23); a rotating rod (22) extends into the transmission box (23) and is connected to the central toothed disc (25); two sets of transverse racks (26) arranged in parallel are located in the transmission box (23) and mesh with the central toothed disc (25); a middle section of the inclined guide plate (17) is rotatably mounted on the end of the reflux enhancement baffle (3) close to the liquid collecting port (5) through a central mounting shaft (27); a limiting slide groove (28) is symmetrically arranged on the back side of the inclined guide plate (17) with the central mounting shaft (27) as the center; a limiting slide block (29) is slidably connected to the limiting slide groove (28); the limiting slide block (29) is connected to the transverse rack (26); and an avoidance hole for facilitating the transverse sliding of the limiting slide block (29) is opened on the reflux enhancement baffle (3).

10. The device for treating wastewater by adaptive internal circulation wet oxidation according to claim 7, characterized in that: The posture adjustment component (18) further comprises: an adjustment dial (30) rotatably mounted on the side end of the main reactor (8), the adjustment dial (30) being located above the side opening (19), a telescopic rod (31) being mounted on the end of the rotating rod (22) away from the transmission box (23), an adjustment screw (32) being mounted on the end of the telescopic rod (31) away from the rotating rod (22), an adjustment groove being opened on the adjustment dial (30) for facilitating the insertion of the adjustment screw (32), the opening direction of the adjustment groove being arranged to point to the central end of the adjustment dial (30), and a locking component for locking the adjustment dial (30) being further mounted on the main reactor (8).

Images