A desulfurization wastewater recycling device

Abstract

The present application relates to the technical field of industrial wastewater treatment, and particularly relates to a desulfurization wastewater recycling device. The device comprises a base loading box and a supporting tower column arranged on the base loading box, forming a tower structure from bottom to top. A circulation flow guide area, an ultraviolet irradiation area and a gas-liquid separation area are sequentially arranged in the supporting tower column from bottom to top. An oxidation reaction container is arranged in the base loading box, a propeller flow rotation shaft with a propeller flow rotation impeller is arranged in the oxidation reaction container, and a swingable aeration support frame is arranged, integrated with staggered aeration cylinders and water dispersing rollers. The ultraviolet irradiation area is provided with a light radiation injection section, a speed reduction and sedimentation water section and a interception and filtration section from bottom to top, a rotating ultraviolet lamp support is arranged on the center line, and fixed spiral ultraviolet lamp tubes are arranged on the tower wall. Through the tower integration of dynamic aeration oxidation and three-dimensional rotating photocatalytic fluidized bed, the reaction dead zone is eliminated, the mass transfer and photocatalytic efficiency are strengthened, and zero emission and full resource recycling of the desulfurization wastewater are realized.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a device for the resource recovery and utilization of desulfurization wastewater. Background Technology

[0002] Desulfurization wastewater from industries such as coal-fired power plants and steel smelting has a complex composition, containing high concentrations of salts, sulfites, suspended solids, and recalcitrant organic matter, making it difficult to treat. With increasingly stringent environmental regulations, the deep purification and resource recovery of desulfurization wastewater has become an inevitable trend. Existing treatment technologies typically employ a segmented process of "oxidation-coagulation sedimentation-filtration," with each treatment unit independently set up and connected in series via pipelines and pumps. The oxidation unit often uses fixed aeration devices for air or oxygen aeration to oxidize sulfites into sulfates.

[0003] However, existing technologies have drawbacks in implementation: fixed aeration systems suffer from solidified bubble plume channels and limited gas-liquid contact area, leading to dead zones in the oxidation reaction and low oxygen transfer efficiency; while in photocatalytic units, light-shielding areas easily form between the fixed light source and the statically packed catalyst particles, and the accumulation of organic matter on the catalyst surface makes in-situ regeneration difficult, causing photocatalytic efficiency to rapidly decline with prolonged operation. These shortcomings result in existing segmented process systems having large footprints, unstable treatment effects, and high operating costs, making it difficult to achieve the economical and efficient full resource recovery of desulfurization wastewater. Summary of the Invention

[0004] The purpose of this invention is to provide a device for the resource recovery and utilization of desulfurization wastewater to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A desulfurization wastewater resource recovery and utilization device includes a base support box and a support tower. The support tower is erected on the base support box to form a tower structure with bottom-up flow. An oxidation reaction vessel is installed inside the base support box. The support tower is divided into a circulation guide area, an ultraviolet irradiation area, and a gas-liquid phase separation area. The circulation guide area is located at the bottom and is connected to the oxidation reaction vessel and leads to the ultraviolet irradiation area. The gas-liquid phase separation area is located at the top. The oxidation reaction vessel is provided with a propulsion flow shaft at the center line position, a propulsion flow impeller is provided on the propulsion flow shaft, and a flow guiding screw conveyor is provided at the upper and lower ends of the propulsion flow shaft; The oxidation reaction vessel is equipped with an aeration unit assembly, which includes an aeration support frame. The aeration support frame is a frame structure on which an aeration cylinder assembly and a water-repellent diffusion roller are installed. The aeration cylinder assembly and the water-repellent diffusion roller are arranged alternately. The aeration support frame as a whole has a movable swing structure, which can be swing-suspended in the oxidation reaction vessel and driven to swing by a propulsion cylinder. The ultraviolet irradiation area is provided from bottom to top with a light injection section, a deceleration sedimentation section and a interception filtration section. The light injection section contains fluidized activated carbon particles, and the interception filtration section is used to intercept activated carbon particles. A rotating ultraviolet lamp holder is provided at the center line of the ultraviolet irradiation area. A fixed spiral ultraviolet lamp tube and an internal support ring are also provided in the ultraviolet irradiation area. The fixed spiral ultraviolet lamp tube is fixed on the internal support ring and cooperates with the rotating ultraviolet lamp holder.

[0006] As a further aspect of the present invention: a sediment outlet is provided at the bottom of the bottom cone of the base housing, and a residual liquid discharge outlet is provided at a slightly higher position on the side wall of the cone; a central drive element is installed at the top of the oxidation reaction vessel, and the central drive element is driven and connected to the propulsion shaft.

[0007] As a further aspect of the present invention: the lower end of the flow guiding spiral conveyor extends to the cone opening of the base mounting box, and the upper end extends to the inlet of the turnover flow guiding area; a multi-layer flow guiding honeycomb plate is provided in the turnover flow guiding area.

[0008] As a further aspect of the present invention: the aeration support frame is swayable and hoisted by means of a lateral support, a swing pin, a hoisting connection point and a fixed hanging plate. The lateral support is fixed to the inner wall of the oxidation reaction vessel, the swing pin passes through the lateral support and the aeration support frame, and the hoisting connection point is connected to the fixed hanging plate; the propulsion cylinder is connected to the aeration support frame by a propulsion connecting pin.

[0009] As a further aspect of the present invention: a fixed base plate is provided on the aeration support frame, and the aeration cylinder assembly is installed on the fixed base plate; there are three water-dispersing rollers, each located on one side wing of the corresponding aeration cylinder assembly; a drive base plate is also fixedly installed on the aeration support frame, and a drive device is installed on the drive base plate. The drive end of the drive device is provided with a power wheel, which is linked to the synchronous belt pulley through a synchronous transmission belt. A tensioning wheel is used to tighten the synchronous transmission belt.

[0010] As a further aspect of the present invention: the synchronous belt pulley is provided with three corresponding to the three water-dispersing rollers, and the tensioning rollers are four in number and arranged in different positions; the driving device is a waterproof servo motor.

[0011] As a further aspect of the present invention: the deceleration and settling section is an annular structure with a V-shaped protrusion on the inner side; the rotating ultraviolet lamp bracket includes a central support shaft, a spiral ribbon, a ribbon support plate, an auxiliary stirring plate, a lateral support arm, and an irradiation lamp column. The spiral ribbon is fixed to the central support shaft by the ribbon support plate, the auxiliary stirring plate and the lateral support arm are connected to the central support shaft, and the irradiation lamp column is installed at the end of the lateral support arm.

[0012] As a further aspect of the present invention: the top of the rotating ultraviolet lamp bracket passes through the deceleration sedimentation section and is located below the interception and filtration section; a rotary joint is connected to the top of the rotating ultraviolet lamp bracket; a protective filter is provided at the air hole of the rotary joint; and an upper guide is installed at the outlet of the ultraviolet irradiation area.

[0013] As a further aspect of the present invention: a support frame is provided in the gas-liquid phase separation area, an overflow pumping device is installed on the support frame, a gas guide pipeline is connected to the gas phase space at the top of the tower, a clarified brine separation pipeline is connected to the outlet of the overflow pumping device, a brine turnover pump is installed on the clarified brine separation pipeline, and a lateral support frame reinforces the cylinder of the gas-liquid phase separation area.

[0014] As a further embodiment of the present invention: the ultraviolet irradiation area is also provided with a cleaning spiral cylinder and a rinsing liquid inlet, the cleaning spiral cylinder is sleeved around the fixed spiral ultraviolet lamp tube, and the rinsing liquid inlet is opened on the tower wall; the fluidized activated carbon particles in the light irradiation injection section are loaded with TiO2 or metal catalyst.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention constructs a tower-type integrated wastewater deep treatment device that integrates dynamic aeration oxidation and a three-dimensional rotating photocatalytic fluidized bed. By tightly coupling oxidation reaction, photocatalytic degradation and gas-liquid separation vertically from top to bottom, it achieves efficient resource recovery of desulfurization wastewater.

[0016] In the oxidation section, a swingable frame supports staggered aeration devices and high-speed water-spraying diffusion rollers. Under the synergistic effect of reciprocating swing and mechanical shearing, the bubbles are cut and crushed and dynamically swept across the entire area, eliminating the fixed aeration dead zone, greatly improving the oxygen mass transfer efficiency, and ensuring the complete conversion of reducing sulfides into stable sulfates.

[0017] In the photocatalytic section, a novel approach combines a rotating UV lamp holder with a spiral ribbon and an extended lamp column, while simultaneously matching a spiral UV lamp tube fixed to the tower wall, forming a complementary, dynamic, three-dimensional light field without blind spots. The rotating component forcibly drives the activated carbon particles supporting the catalyst to circulate in a fluidized state, achieving simultaneous and continuous "adsorption-enrichment-in-situ photodegradation" of organic matter and online catalyst regeneration. A deceleration settling and retention filtration structure is also used to prevent catalyst loss.

[0018] The entire unit relies on a tower-type unidirectional flow to complete the entire process from deep oxidation to clean brine separation in a single device. It has a compact structure and stable operation, and ultimately converts desulfurization wastewater into high-purity reusable brine and separated solid phase, truly achieving zero discharge and full resource recovery.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0021] Figure 1 This is a schematic diagram of the overall structure of the desulfurization wastewater resource recovery and utilization device provided in an embodiment of the present invention.

[0022] Figure 2 This is a cross-sectional structural diagram of an oxidation reaction vessel provided in an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the structure of the aeration support frame and aeration unit assembly provided in an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the structure of the ultraviolet irradiation region provided in an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the structure of the rotating ultraviolet lamp holder provided in an embodiment of the present invention.

[0026] In the diagram: 11. Base support box; 12. Support tower; 2. Oxidation reaction vessel; 21. Sediment outlet; 22. Residual liquid discharge outlet; 23. Central drive element; 24. Propeller shaft; 25. Propeller impeller; 26. Guide screw conveyor; 3. Turnover guide area; 4. Ultraviolet irradiation area; 41. Light irradiation injection section; 42. Deceleration settling water section; 43. Retention and filtration section; 44. Top guide device; 45. Rotary joint; 46. Safe filter; 5. Gas-liquid phase separation area; 51. Support frame; 52. Overflow pump device; 53. Gas guide pipeline; 54. Clarified brine separation pipeline; 55. Lateral support frame; 56. Brine turnover pump; 6. Aeration. Support frame; 61. Lateral fulcrum; 62. Swing pin; 63. Lifting connection point; 64. Fixed hanging plate; 65. Propulsion cylinder; 66. Propulsion connecting pin; 7. Aeration unit assembly; 71. Fixed base plate; 72. Aeration cylinder assembly; 73. Water-repellent diffusion roller; 74. Synchronous pulley; 75. Drive base plate; 76. Tensioning wheel; 77. Synchronous transmission belt; 78. Drive device; 8. Rotary UV lamp bracket; 81. Central support shaft; 82. Spiral strip; 83. Strip support plate; 84. Irradiation lamp column; 85. Auxiliary stirring plate; 86. Lateral support arm; 91. Fixed spiral UV lamp tube; 92. Built-in support ring; 93. Cleaning spiral cylinder; 94. Rinse fluid inlet. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, examples of which are illustrated in the drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or identical elements.

[0028] Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] The specific implementation of the present invention will be described in detail below with reference to specific embodiments. Example 1

[0030] This embodiment provides a device for the resource recovery and utilization of desulfurization wastewater. For example... Figures 1 to 3As shown, the device includes a base housing 11 and a support tower 12. The support tower 12 is erected and sealed to the upper flange of the base housing 11, forming a tower structure with flow diversion from bottom to top. An oxidation reaction vessel 2 is disposed in the center of the interior of the base housing 11. The oxidation reaction vessel 2 is a pressure-bearing cylinder, and its bottom is connected to the internal space of the base housing 11. The support tower 12 is physically divided into a circulation guide area 3, an ultraviolet irradiation area 4, and a gas-liquid phase separation area 5 from bottom to top. The circulation guide area 3 is located at the bottom and is connected to the water outlet of the oxidation reaction vessel 2. The ultraviolet irradiation area 4 is connected above the circulation guide area 3. The gas-liquid phase separation area 5 is located in the uppermost enlarged section of the support tower 12. A propulsion shaft 24 is positioned at the vertical centerline of the oxidation reaction vessel 2. Multiple axial-flow propulsion impellers 25 are fixedly mounted on the propulsion shaft 24. Guide screw conveyors 26 are positioned at the upper and lower ends of the propulsion shaft 24. The lower guide screw conveyor 26 extends to the conical opening of the base support box 11, and the upper guide screw conveyor 26 extends to the inlet of the circulation guide area 3. Aeration unit assemblies 7 are arranged inside the oxidation reaction vessel 2 on both sides of the propulsion shaft 24. Each aeration unit assembly 7 includes an aeration support frame 6, which is a rigid frame structure. An aeration cylinder assembly 72 and a water-repellent diffusion roller 73 are mounted on the aeration support frame 6, with the aeration cylinder assembly 72 and the water-repellent diffusion roller 73 arranged alternately. The aeration support frame 6 has a movable swing-type structure. It can be swing-type suspended in the oxidation reaction vessel 2 through the lateral support 61, swing pin 62, hoisting connection point 63 and fixed hanging plate 64. The propulsion cylinder 65 is connected to the aeration support frame 6 to drive its reciprocating swing. The bottom cone of the base support box 11 is provided with a sediment discharge port 21 at the bottom end, and a residual liquid discharge port 22 is provided at a slightly higher position on the side wall of the cone.

[0031] Desulfurization wastewater is introduced into the substrate housing 11 and enters the oxidation reaction vessel 2. A centrally located drive element 23 drives the propulsion shaft 24 to rotate, and the propulsion impeller 25 generates axial flow and radial diffusion, forming a macroscopic circulating flow from bottom to top. A guide screw conveyor 26 forcibly sucks up the bottom sediment and pressurizes it upwards, exhibiting a convergent and expanding ejection trend. Simultaneously, the aeration cylinder assembly 72 generates a large number of microbubbles, and the high-speed rotation of the water-dispersing roller 73 shears and ejects the bubbles. The propulsion cylinder 65 drives the entire aeration support frame 6 to reciprocate at 15-30°, causing the bubble plume to dynamically sweep. The oxidized liquid is rectified in the circulation guide area 3 and enters the upper layer. High-density crystalline salts and impurities settle into the cone of the substrate housing 11 and are periodically discharged through the sediment outlet 21. The upper clear liquid can be discharged or recirculated through the residual liquid outlet 22.

[0032] The technical principle of this embodiment lies in combining the "chimney effect" of a tower structure with mechanical propulsion to achieve long-distance vertical propulsion of wastewater without the need for an additional transfer pump, greatly reducing short-circuiting and backmixing. The propulsion impeller 25 generates a macroscopic circulating flow with the center upward and the sidewalls downward, eliminating dead zones. The oscillation of the dynamic aeration support 6 causes the aeration zone to change over time, combined with the mechanical shearing of the water-dispersing roller 73, achieving a synergistic enhancement of "aeration-shearing-diffusion". This embodiment improves the oxygen transfer coefficient by more than 40% compared to traditional fixed aeration, resulting in a more thorough oxidation reaction. Reducing substances such as sulfite in the wastewater are efficiently oxidized to stable sulfates, while particulate matter settles and separates clearly, laying a solid material foundation for subsequent deep purification. Example 2

[0033] Based on Example 1, this embodiment provides detailed specifications for the aeration unit component 7 and its connection structure, as shown in Figure 3.

[0034] A fixed base plate 71, made of high-molecular-weight polyethylene wear-resistant plate, is fixedly mounted on the frame of the aeration support frame 6. Aeration cylinder assemblies 72 are mounted in pairs on the fixed base plate 71, positioned near the propulsion impeller 25. Three water-repelling diffusion rollers 73 are provided, all mounted on the frame of the aeration support frame 6. Each water-repelling diffusion roller 73 is located on both sides of the corresponding aeration cylinder assembly 72, forming a staggered arrangement. A synchronous pulley 74 is mounted on the shaft end of each water-repelling diffusion roller 73. A drive base plate 75 is also fixedly mounted on the aeration support frame 6. A drive device 78, a waterproof servo motor, is mounted on the drive base plate 75, with a power wheel at its drive end. The power wheel is linked to the three synchronous pulleys 74 via a synchronous transmission belt 77, which is an annular toothed belt. Four tensioning pulleys 76 are arranged in different positions to tighten the synchronous transmission belt 77. The suspension and drive structure of the aeration support frame 6 is as follows: a lateral support point 61 is fixed to the inner wall of the oxidation reaction vessel 2, and a swing pin 62 passes through the lateral support point 61 and forms a hinge with the pin hole of the aeration support frame 6; a hoisting connection point 63 is located at the top of the aeration support frame 6, and a fixed hanging plate 64 is fixed at the top of the vessel and connected at the bottom to the hoisting connection point 63, forming a three-point flexible suspension; the tailstock of the propulsion cylinder 65 is fixed to the outer wall of the vessel, and its piston rod extends into the interior and is connected to the hinge point on the side of the aeration support frame 6 through a propulsion connecting pin 66, thereby converting the telescopic push-pull into the reciprocating swing of the frame. A centrally located drive element 23 is installed at the top of the oxidation reaction vessel 2, and the output shaft of the centrally located drive element 23 is rigidly connected to the propulsion flow shaft 24. A multi-layer flow guide honeycomb plate is provided in the circulation guide area 3.

[0035] A centrally located drive element 23 provides adjustable rotational power, propelling the impeller 25 to agitate the liquid and generate a main circulating flow. The drive unit 78 drives three water-dispersing rollers 73 to rotate synchronously at high speed via a synchronous transmission belt 77, creating a negative pressure hydraulic shear field within the area where the aeration cylinder assembly 72 sprays out bubble clusters, instantly cutting the bubbles into microbubbles and throwing them far away. Simultaneously, the propulsion cylinder 65 periodically pushes and pulls the aeration support frame 6 via the propulsion connecting pin 66, causing the entire frame to reciprocate around the swing pin shaft 62, driving the aeration cylinder assembly 72 and the water-dispersing rollers 73 to move together, and the bubble plume dynamically sweeps across the entire container cross-section. The oxidized liquid passes through the guide honeycomb plate, where the rotating flow is rectified into a flat laminar flow, uniformly entering the ultraviolet irradiation area 4.

[0036] A servo motor-driven synchronous belt system ensures precise synchronization of the three water-dispersing rollers 73, while the tensioning wheel 76 maintains transmission stability, making the water-dispersing shearing action stable and reliable. The reciprocating oscillating mechanism periodically changes the aeration point position, avoiding short-circuiting of the bubble channels formed by fixed aeration and achieving uniform gas holdup throughout the entire space. In this embodiment, the aeration area dynamically expands, significantly increasing the contact area and time between bubbles and water, resulting in a significant improvement in oxygen utilization; simultaneously, mechanical shearing reduces bubble size, further enhancing mass transfer. The integrated synchronous belt drive structure is compact, reducing underwater dynamic sealing points and lowering maintenance costs. The rectifying effect of the rotating guide zone 3 ensures the uniformity of the feed water to the subsequent photocatalytic reactor. Example 3

[0037] Based on the above embodiments, such as Figure 4 and Figure 5 As shown, this embodiment provides a detailed implementation of the ultraviolet irradiation region 4, the rotating light source, and the fluidized catalytic system.

[0038] The ultraviolet irradiation zone 4 is located in the middle of the supporting tower 12, and is composed of a light injection section 41, a deceleration settling section 42, and a retention filtration section 43 connected from bottom to top. The light injection section 41 is a straight cylindrical section of the tower body, filled with fluidized activated carbon particles, on which TiO2 or a metal catalyst is loaded. The deceleration settling section 42 is an annular constriction structure, whose flow cross-section first suddenly expands and then narrows, forming a V-shaped convex guide weir on the inner side. The retention filtration section 43 is located at the top and is a wedge-shaped mesh or membrane filter assembly with a mesh size smaller than the activated carbon particle size. A rotating ultraviolet lamp support 8 is set on the vertical centerline of the ultraviolet irradiation zone 4. The bottom of the rotating ultraviolet lamp support 8 is fixed by a bearing seat, and the top passes through the deceleration settling section 42 and is located below the retention filtration section 43. A rotary joint 45 is connected to the top of the rotating ultraviolet lamp support 8, and a protective filter 46 is set at the vent of the rotary joint 45. An upper-mounted flow guide 44 is installed at the outlet of the ultraviolet irradiation area 4. The rotating ultraviolet lamp holder 8 includes a central support shaft 81, a spiral ribbon 82, a ribbon support plate 83, an auxiliary stirring plate 85, a lateral support arm 86, and an irradiation lamp column 84. The spiral ribbon 82 is fixed to the periphery of the central support shaft 81 in a spiral manner via the ribbon support plate 83. The auxiliary stirring plate 85 and the lateral support arm 86 are both connected to the central support shaft 81. The irradiation lamp column 84 is vertically installed at the end of the lateral support arm 86, forming a vertical linear light source array that expands from the inside out. On the inner wall of the ultraviolet irradiation area 4, a fixed spiral ultraviolet lamp tube 91 and an internal support ring 92 are also provided. The fixed spiral ultraviolet lamp tube 91 is coiled and fixed on the internal support ring 92, forming complementary irradiation with the rotating ultraviolet lamp holder 8. A cleaning spiral tube 93 is fitted around the fixed spiral ultraviolet lamp tube 91. A rinsing liquid inlet 94 is provided on the tower wall, through which acid washing liquid can be introduced to rinse the cleaning spiral tube 93 and the catalyst online.

[0039] Water carrying organic pollutants enters from the irradiation injection section 41. The rotating ultraviolet lamp holder 8 is driven to rotate from the bottom. The spiral ribbon 82 and auxiliary stirring plate 85 generate an upward axial thrust and agitate the fluid, causing the activated carbon particles loaded with catalyst to circulate in a fluidized state around the ultraviolet lamp. The irradiation lamp column 84 and the fixed spiral ultraviolet lamp tube 91 simultaneously emit ultraviolet light, constructing a dynamic three-dimensional irradiation field. Organic matter is rapidly adsorbed by the activated carbon and enriched on the particle surface, undergoing photocatalytic degradation under the action of ultraviolet light and catalyst. When the water flows upward through the deceleration and settling section 42, it decelerates due to the sudden expansion of the cross-section and diffuses outward under the guidance of the V-shaped convex flow. The suspended activated carbon particles begin to settle and fall back due to gravity. The interception and filtration section 43 physically intercepts the remaining particles that escape, ensuring that the effluent is free of particulate matter. The rotary joint 45 ensures continuous power supply and signal transmission for the rotating lamp holder and protects the filter 46 from dust entry.

[0040] In this embodiment, the dynamically rotating lamp holder serves as both a light source and a stirrer, eliminating the light-shielding dead zones commonly found in traditional fixed photocatalytic reactors. The rotation of the spiral ribbon 82 forces activated carbon particles to undergo a three-phase mass transfer process involving solid, liquid, and light. The activated carbon is responsible for adsorbing and enriching organic matter, while TiO2 generates active oxygen species under UV excitation, degrading the adsorbed organic matter in situ. The activated carbon particles are then regenerated online, achieving continuous and efficient purification. The double-layered UV lamp arrangement ensures no blind spots in irradiation. This achieves integrated deep purification through adsorption-enrichment-photodegradation, exhibiting extremely high removal efficiency, especially for recalcitrant organic matter in desulfurization wastewater. The catalyst circulates internally with the water flow, resulting in high utilization and low loss. The online cleaning functions of the interception filter section 43 and the cleaning spiral cylinder 93 ensure long-term stable operation of the system and simplify maintenance. Example 4

[0041] Based on the above embodiments, such as Figure 1 As shown, this embodiment provides a specific implementation of the gas-liquid phase separation region 5 and the clarified liquid recovery system. The structure is described as follows: The gas-liquid phase separation region 5 is located in the uppermost enlarged section of the supporting tower 12, and a supporting frame 51 is welded inside. The supporting frame 51 is a steel structure platform on which an overflow pumping device 52 is installed. The overflow pumping device 52 uses a precision overflow weir to control the liquid level, and an internal pump outputs clarified brine. A gas guide pipe 53 is connected to the gas phase space at the top of the tower to draw out the tail gas rich in oxygen and trace amounts of volatile organic compounds. A clarified brine separation pipe 54 is connected to the outlet of the overflow pumping device 52, and a brine transfer pump 56 is installed on the clarified brine separation pipe 54 for pressurized external output. A lateral support frame 55 reinforces the cylinder of the gas-liquid phase separation region 5. The base supporting box 11, the oxidation reaction vessel 2, and the connections between the various regions are as described above.

[0042] After being treated by the interception and filtration section 43, the clean water carrying a small amount of microbubbles enters the gas-liquid separation zone 5. Due to the increased tower diameter and the sudden drop in flow velocity, the bubbles naturally rise to the surface under the action of gravity and buoyancy, enter the gas phase space, and are discharged by the gas guide pipe 53. The clarified brine maintains a stable liquid level under the control of the overflow weir of the overflow pumping device 52. It is drawn in by the built-in pump and pressurized to the clarified brine separation pipe 54. After being pressurized by the brine transfer pump 56, it is sent out of the device as high-purity industrial brine for reuse. The sediment outlet 21 and the residual liquid discharge outlet 22 periodically discharge the sediment and residual liquid in the cone.

[0043] This embodiment utilizes gravity settling and the deceleration principle of the expansion section to achieve efficient gas-liquid separation. Overflow pumping avoids cavitation during pump intake, ensuring stable delivery. The gas guide pipe 53 centrally processes the separated gas to prevent secondary pollution. The recovered brine is of high purity and can be directly reused in desulfurization systems or other industrial processes, achieving full resource utilization of wastewater. The gas-liquid separation is thorough, the brine delivery pump has a long service life, and the entire unit, from bottom oxidation to top production of clean brine, has a compact process, requires little space, and has low operating costs.

[0044] Based on the above embodiments, the workflow and synergistic effects of the entire device are comprehensively described. Wastewater enters the oxidation reaction vessel 2 through the substrate container 11, where oxidation is completed under the impetus of the dynamic aeration system and the guide spiral, and the solid phase is discharged separately from the bottom. After being rectified through the circulation guide area 3, the water enters the ultraviolet irradiation area 4, where it comes into full contact with the fluidized catalytic activated carbon. The rotating ultraviolet lamp holder 8 and the fixed spiral ultraviolet lamp tube 91 form a light field without dead angles, degrading organic matter. After deceleration sedimentation and interception filtration, the clean liquid removes residual gas in the gas-liquid phase separation area 5, and the overflow pump device 52 produces recovered brine. The entire tower structure achieves unidirectional flow, and combined with dynamic aeration and three-dimensional rotating photocatalysis, pollutants in the desulfurization wastewater are removed step by step, ultimately obtaining high-purity salt that can be crystallized and recovered, and compliant discharge water. The various subsystems work together, with oxidation, photocatalysis, and separation linked together, truly achieving the innovative effect of zero discharge and full resource recovery of desulfurization wastewater.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A desulfurization wastewater resource recycling device, comprising a base support box (11) and a support tower (12), wherein the support tower (12) is mounted on the base support box (11) to form a tower structure with flow from bottom to top, wherein an oxidation reaction vessel (2) is provided inside the base support box (11), and the support tower (12) is divided into a circulation guide area (3), an ultraviolet irradiation area (4) and a gas-liquid phase separation area (5), wherein the circulation guide area (3) is located at the bottom and is connected to the oxidation reaction vessel (2) and leads to the ultraviolet irradiation area (4), and the gas-liquid phase separation area (5) is located at the top; Its features are, The oxidation reaction vessel (2) is provided with a propulsion flow shaft (24) at the center line position, a propulsion flow impeller (25) is provided on the propulsion flow shaft (24), and a guide screw conveyor (26) is provided at the upper and lower ends of the propulsion flow shaft (24). An aeration unit assembly (7) is provided inside the oxidation reaction vessel (2). The aeration unit assembly (7) includes an aeration support frame (6). The aeration support frame (6) is a frame structure, on which an aeration cylinder assembly (72) and a water-repellent diffusion roller (73) are installed. The aeration cylinder assembly (72) and the water-repellent diffusion roller (73) are arranged alternately. The aeration support frame (6) is an integral movable swing structure, which can be swing-suspended inside the oxidation reaction vessel (2) and driven to swing by a propulsion cylinder (65). The ultraviolet irradiation area (4) is provided with a light irradiation injection section (41), a deceleration sedimentation section (42) and a interception filtration section (43) from bottom to top. The light irradiation injection section (41) contains fluidized activated carbon particles, and the interception filtration section (43) is used to intercept activated carbon particles. A rotating ultraviolet lamp bracket (8) is provided at the center line of the ultraviolet irradiation area (4). A fixed spiral ultraviolet lamp tube (91) and an internal support ring (92) are also provided in the ultraviolet irradiation area (4). The fixed spiral ultraviolet lamp tube (91) is fixed on the internal support ring (92) and cooperates with the rotating ultraviolet lamp bracket (8).

2. The desulfurization wastewater resource recovery and utilization device according to claim 1, characterized in that, The bottom cone of the base housing (11) is provided with a sediment outlet (21) and a residual liquid outlet (22) is provided at a slightly higher position on the side wall of the cone. The oxidation reaction vessel (2) is equipped with a central drive element (23) at the top, and the central drive element (23) is driven and connected to the propulsion shaft (24).

3. The desulfurization wastewater resource recovery and utilization device according to claim 1, characterized in that, The lower end of the guide spiral conveyor (26) extends to the cone opening of the base mounting box (11), and the upper end extends to the inlet of the turnover guide area (3); the turnover guide area (3) is provided with a multi-layer guide honeycomb plate.

4. The desulfurization wastewater resource recovery and utilization device according to claim 1, characterized in that, The aeration support frame (6) is swayable and hoisted by a lateral support (61), a swing pin (62), a hoisting connection point (63) and a fixed hanging plate (64). The lateral support (61) is fixed to the inner wall of the oxidation reaction vessel (2). The swing pin (62) passes through the lateral support (61) and the aeration support frame (6). The hoisting connection point (63) is connected to the fixed hanging plate (64). The propulsion cylinder (65) is connected to the aeration support frame (6) by a propulsion connecting pin (66).

5. The desulfurization wastewater resource recovery and utilization device according to claim 1, characterized in that, The aeration support frame (6) is provided with a fixed base plate (71), and the aeration cylinder assembly (72) is installed on the fixed base plate (71); there are three water-spreading diffusion rollers (73), each water-spreading diffusion roller (73) is located on both sides of the corresponding aeration cylinder assembly (72); the aeration support frame (6) is also fixedly installed with a drive base plate (75), and a drive device (78) is installed on the drive base plate (75). The drive end of the drive device (78) is provided with a power wheel, which is linked to the synchronous belt pulley (74) through a synchronous transmission belt (77). The tensioning wheel (76) is used to tighten the synchronous transmission belt (77).

6. The desulfurization wastewater resource recovery and utilization device according to claim 5, characterized in that, The synchronous pulley (74) is provided with three corresponding to the three water-spreading and diffusion rollers (73), and the tensioning rollers (76) are four in number and arranged in different positions; the driving device (78) is a waterproof servo motor.

7. The desulfurization wastewater resource recovery and utilization device according to claim 1, characterized in that, The deceleration and settling section (42) is an annular structure with a V-shaped protrusion on the inner side; the rotating ultraviolet lamp bracket (8) includes a central support shaft (81), a spiral strip (82), a strip support plate (83), an auxiliary stirring plate (85), a lateral support arm (86), and an irradiation lamp column (84). The spiral strip (82) is fixed to the central support shaft (81) by the strip support plate (83). The auxiliary stirring plate (85) and the lateral support arm (86) are connected to the central support shaft (81). The irradiation lamp column (84) is installed at the end of the lateral support arm (86).

8. The desulfurization wastewater resource recovery and utilization device according to claim 7, characterized in that, The top of the rotating ultraviolet lamp bracket (8) passes through the deceleration sedimentation section (42) and is located below the interception and filtration section (43). A rotary joint (45) is connected to the top of the rotating ultraviolet lamp bracket (8), and a protective filter (46) is provided at the air hole of the rotary joint (45). An upper guide (44) is installed at the outlet of the ultraviolet irradiation area (4).

9. The desulfurization wastewater resource recovery and utilization device according to claim 1, characterized in that, A support frame (51) is provided in the gas-liquid phase separation area (5). An overflow pumping device (52) is installed on the support frame (51). A gas guide pipe (53) is connected to the gas phase space at the top of the tower. A clarified brine separation pipe (54) is connected to the outlet of the overflow pumping device (52). A brine turnover pump (56) is installed on the clarified brine separation pipe (54). A lateral support frame (55) reinforces the cylinder of the gas-liquid phase separation area (5).

10. The desulfurization wastewater resource recovery and utilization device according to claim 1, characterized in that, The ultraviolet irradiation area (4) is also provided with a cleaning spiral cylinder (93) and a rinsing liquid inlet (94). The cleaning spiral cylinder (93) is fitted around the fixed spiral ultraviolet lamp tube (91), and the rinsing liquid inlet (94) is opened on the tower wall. The fluidized activated carbon particles in the light irradiation injection section (41) are loaded with TiO2 or metal catalyst.

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