Fenton iron-containing sludge recycling device and recycling method

Abstract

The present invention belongs to the technical field of sewage treatment, and specifically discloses a recycling device and recycling method of Fenton iron-containing sludge, including a shell, a guide shell embedded in the upper end of the shell, two injection pipes fixedly connected to the side wall of the guide shell, a first fixed ring and a second fixed ring fixedly connected to the shell, a rotating frame rotatably arranged between the first fixed ring and the second fixed ring, a screen provided on the rotating frame, a driving motor fixedly connected to the shell, the output shaft of the driving motor fixedly connected to the second rotating shaft, the second rotating shaft fixedly connected to the rotating block through the first fixed plate, the shell is connected to the first discharge shell and the second discharge shell, and an ultraviolet radiation unit is fixedly connected to the first discharge shell. The present invention utilizes two injection pipes to inject liquid and mix with the sludge, and then combines the irradiation of the ultraviolet radiation unit to make the Fe 3+ Fe 2+ , complete the recycling of useful substances in Fenton iron-containing sludge and reduce resource waste.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a recycling device and a recycling method for Fenton iron-containing sludge. Background Art

[0002] The Fenton oxidation process is a traditional advanced oxidation technology. It is widely used in the field of sewage treatment. The basic principle of the Fenton reaction is to use Fe 2+ The catalytic decomposition of hydrogen peroxide generates hydroxyl free radicals with extremely high oxidation ability. The hydroxyl free radicals in the subsequent Fenton oxidation process oxidize the organic pollutants in the sewage into harmless sludge products, which are then dehydrated to form sludge and filtrate. At this time, the sludge is enriched with a large amount of iron, causing the iron ions serving as the catalyst to be lost along with the sludge, thereby causing a waste of the iron ion catalyst. As a result, the catalyst needs to be continuously replenished in subsequent processing links. At the same time, the iron element in the sludge becomes a potential source of environmental pollution during the sludge landfill treatment process. In view of this, the sludge needs to be subsequently treated with complicated procedures before landfilling, which increases the treatment process and cost. Summary of the invention

[0003] In order to overcome the above-mentioned technical problems, the present invention provides a recycling device and a recycling method for Fenton iron-containing sludge.

[0004] The technical solution of the present invention is: a Fenton iron-containing sludge recycling device, comprising a shell, a material guide shell is embedded in the upper part of the shell, two injection pipes with electromagnetic valves are fixedly connected to the side wall of the material guide shell, the material guide shell is rotatably provided with a first rotating shaft, the first rotating shaft is provided with a supporting plate, the shell is fixedly provided with a first fixed ring and a second fixed ring, a rotating frame is rotatably provided between the first fixed ring and the second fixed ring, the rotating frame is provided with circumferentially equidistantly distributed screens, the bottom of the shell is fixedly provided with a driving motor, the output shaft of the driving motor is fixedly provided with a second rotating shaft rotatably connected to the shell, The second rotating shaft is fixedly connected with a symmetrically distributed first fixed plate, and the symmetrically distributed first fixed plates are commonly fixed with a rotating block. The side wall of the shell is connected with a first discharge shell and a second discharge shell. The connecting port between the first discharge shell and the shell is located on the upper side of the second fixed ring. An ultraviolet radiation unit is installed on the first discharge shell. The connecting port between the second discharge shell and the shell is located below the second fixed ring. The second rotating shaft is fixedly connected with a first fixed frame. A stirring mechanism for rotating the first rotating shaft is arranged on the material guide shell, and a rotating mechanism for rotating the rotating frame is arranged in the shell.

[0005] More preferably, the outer diameters of the rotating frame and the rotating block gradually decrease from the middle to both ends, a gap exists between the rotating frame and the rotating block, and the gap between the rotating frame and the rotating block gradually decreases from top to bottom.

[0006] More preferably, the stirring mechanism includes a servo motor, which is fixedly connected to the material guide shell, and the output shaft of the servo motor is transmitted to the first rotating shaft through a gear set, and the side wall of the first rotating shaft is rotatably provided with a first stirring frame distributed circumferentially equidistantly, and the material guide shell is fixedly connected with a second fixed frame, a rotating cavity is provided in the first rotating shaft, and the second fixed frame is located in the rotating cavity of the first rotating shaft, and the first stirring frames distributed circumferentially equidistantly are all transmitted to the second fixed frame through a bevel gear set.

[0007] More preferably, the rotating mechanism includes a first fixed shell, the first fixed shell is fixedly connected to the shell body, the first fixed shell is located below the support plate, and the first fixed shell is located above the first fixed ring, the second rotating shaft is fixedly connected to a first spur gear, the first fixed shell is rotatably provided with a second spur gear meshing with the first spur gear, the first fixed shell is rotatably provided with a gear ring meshing with the second spur gear, and the gear ring is fixedly connected to the rotating frame.

[0008] More preferably, it also includes a uniform speed discharging mechanism for controlling the amount of material falling, the uniform speed discharging mechanism is arranged on the first rotating shaft, the uniform speed discharging mechanism includes a second fixed plate, the second fixed plate is fixedly connected to the first rotating shaft, and the second fixed plate is rotatably connected to the material guide shell, the material guide shell is fixedly connected with a first rotating plate and a second rotating plate which are both rotatably connected to the first rotating shaft, the first rotating plate and the second rotating plate are respectively located on both sides of the second fixed plate, and the first rotating plate and the second rotating plate are both in contact with and cooperate with the second fixed plate, the second fixed plate, the first rotating plate and the second rotating plate are all provided with through holes, the through holes on the first rotating plate and the through holes on the second rotating plate are staggered, and an adjustment component for controlling the falling speed of the material is provided on the first rotating shaft.

[0009] More preferably, the adjusting assembly includes a rotating sleeve, which is rotatably arranged on the first rotating shaft, the rotating sleeve penetrates the support plate and is rotatably connected thereto, the rotating sleeve is fixedly connected with a second stirring frame distributed equidistantly in the circumferential direction, the first rotating shaft is fixedly connected with a second fixed shell fixed to the support plate, a torsion spring is installed between the second fixed shell and the rotating sleeve, a symmetrical fixed seat is fixedly connected in the shell body, the symmetrical fixed seats are slidably arranged with a sliding sleeve together, the sliding sleeve is rotatably arranged with a rotating shell, the rotating shell is fixed with a spline rod, the first rotating shaft is provided with a spline groove which is limitedly slidably connected to the spline rod, the rotating sleeve is fixedly connected with a guide rod, the second fixed shell is provided with an arc groove which slidably cooperates with the guide rod, and the rotating shell is provided with an inclined groove which slidably cooperates with the guide rod.

[0010] More preferably, the upper surface of the support plate is configured as a frustum, and a first spiral plate is fixedly connected to the upper surface of the support plate, the first spiral plate is located between the sliding sleeve and the material guide shell, and a spirally distributed inclined baffle is fixedly connected to the upper surface of the first spiral plate.

[0011] More preferably, it also includes a centrifugal mechanism for increasing the centrifugal force of the material, the centrifugal mechanism is arranged on the rotating block, the centrifugal mechanism includes first scrapers distributed equidistantly in the circumference, the first scrapers distributed equidistantly in the circumference are all fixedly connected to the side wall of the rotating block, the rotating block is fixedly connected with second scrapers distributed equidistantly in the circumference, the second scrapers are located below the first scrapers, and the first scrapers and the second scrapers are both in contact with the screen on the rotating frame, and the rotating block is provided with a flipping component for driving the material to move.

[0012] More preferably, the flipping assembly includes a second spiral plate, the second spiral plate is rotatably arranged on the rotating block, and the second spiral plate is located between the rotating block and the first scraper, the rotating block is rotatably provided with a rotating ring, the rotating ring is fixedly connected to the second spiral plate, the rotating ring is fixedly connected to a fixed sleeve, the fixed sleeve is provided with a centrally symmetrical inclined groove, the first fixed plate is slidably provided with a sliding rod, the sliding rod is located in an adjacent inclined groove on the fixed sleeve and slides, a spring is fixedly connected between the sliding rod and the adjacent first fixed plate, a third fixed frame is fixedly connected in the shell, the third fixed frame is located below the rotating block, the third fixed frame is provided with an annular wavy surface, and the annular wavy surface of the third fixed frame is extruded and fitted with all the sliding rods.

[0013] A method for recycling Fenton iron-containing sludge, based on the above-mentioned device for recycling Fenton iron-containing sludge, specifically comprises the following steps:

[0014] S1: First, connect the two injection pipes to the water tank and the acid tank, then start the drive motor, the servo motor, the solenoid valves on the two injection pipes and the ultraviolet radiation unit, and then add the sludge treated by the existing Fenton oxidation process into the guide shell;

[0015] S2: After the sludge enters the guide shell, the sludge is mixed with the water and acid flowing out of the two injection pipes. The servo motor drives the first rotating shaft, the first stirring frame, the rotating sleeve and the second stirring frame to rotate through the connected components to stir and mix the sludge, water and acid, so that the iron ions in the sludge are dissolved in the mixed liquid;

[0016] S3: The mixed mixture overflows from the sliding sleeve under the rotation of the first spiral plate, and then falls between the rotating frame and the rotating block;

[0017] S4: The mixture falls between the rotating frame and the rotating block. Under the operation of the driving motor, the driving motor drives the rotating frame and the rotating block to rotate through the connected parts. The rotation of the rotating block drives the first scraper, the second scraper and the second spiral plate to rotate accordingly. In this process, the second spiral plate reciprocates relative to the rotating block at the same time, so that the liquid in the mixture attached to the screen on the rotating frame flows outward, and the subsequently separated liquid flows out from the first discharge shell through the second fixed ring. The dehydrated sludge falls to the bottom of the shell through the interval of the rotating frame and the rotating block, and the dehydrated sludge is discharged from the second discharge shell;

[0018] S5: The liquid discharged from the first discharge shell passes through the ultraviolet radiation unit, and the ultraviolet radiation unit works to separate the Fe 3+ Transformed into Fe 2+ The liquid is then redirected to the existing Fenton oxidation process to complete the Fe 2+ recycling.

[0019] Compared with the prior art, the present invention has the following advantages: the present invention utilizes two injection pipes to inject liquid and mix with sludge, and then cooperates with the separation and deliquescence operation of the screen on the rotating frame to complete the recovery of iron ions, and then combines the irradiation of the ultraviolet radiation unit to make Fe 3+ To Fe 2+, complete the recycling of useful substances in Fenton iron-containing sludge, reduce resource waste, use the rotation of the second fixed plate to control the sludge to fall at a uniform speed, facilitate the subsequent uniform mixing of sludge and liquid, and improve the dissolution efficiency of iron ions in the sludge in the liquid. In conjunction with the movement of the sliding sleeve, the stirring of the sludge by the second stirring frame is extended to increase the dissolution amount of iron ions in the sludge in the liquid. The first scraper and the second scraper are rotated to scrape and drive away the sludge attached to the screen on the rotating frame, thereby improving the separation effect of the liquid in the sludge, thereby indirectly increasing the recovery and utilization of iron ions. In conjunction with the reciprocating rotation of the second spiral plate, the sludge is evenly attached to the screen on the rotating frame, further improving the separation effect of the liquid in the sludge, thereby improving the recovery and utilization rate of iron ions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the housing and the parts inside the material guide housing of the present invention;

[0022] Figure 3 It is a cross-sectional view of the components at the first rotating shaft and the rotating frame of the present invention;

[0023] Figure 4 It is a cross-sectional view of the components of the rotating frame and the rotating block of the present invention;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the rotating mechanism of the present invention;

[0025] Figure 6 is a cross-sectional view of the adjustment assembly of the present invention;

[0026] Figure 7 It is a cross-sectional view of the components of the rotating sleeve and the second fixed shell of the present invention;

[0027] Figure 8 It is a three-dimensional structural schematic diagram of the centrifugal mechanism of the present invention;

[0028] Fig. 9 It is a cross-sectional view of the flip assembly of the present invention.

[0029] Wherein: 1-shell, 11-material guide shell, 12-liquid injection pipe, 13-first rotating shaft, 14-support plate, 15-first fixed ring, 16-second fixed ring, 17-rotating frame, 18-driving motor, 19-second rotating shaft, 191-first fixed plate, 192-rotating block, 193-first discharge shell, 194-ultraviolet radiation unit, 195-second discharge shell, 196-first fixed frame, 2-servo motor, 21-first stirring frame, 22-second fixed frame, 3-first fixed shell, 31-first spur gear, 32-second spur gear, 33-gear ring, 4-second fixed plate, 41-first rotating plate, 42-second rotating plate, 5-rotating sleeve, 51-second stirring frame, 52-second fixed shell, 53-fixed seat, 54-sliding sleeve, 55-rotating shell, 56-spline rod, 57-guide rod, 58-first spiral plate, 6-first scraper, 61-second scraper, 7-second spiral plate, 71-rotating ring, 72-fixed sleeve, 73-sliding rod, 74-third fixed frame. DETAILED DESCRIPTION

[0030] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0031] Example 1: A Fenton iron-containing sludge recycling device, such as Figure 1-Figure 4As shown, it includes a shell 1, a control panel is installed on the front side of the shell 1, a material guide shell 11 is embedded in the upper part of the shell 1, and two symmetrical injection pipes 12 are fixedly connected to the side wall of the material guide shell 11. The two injection pipes 12 are located above the shell 1, and electromagnetic valves electrically connected to the control panel are installed on the injection pipes 12. The two injection pipes 12 are used to connect the water tank and the acid tank respectively, so as to form a mixed liquid with a specified pH value by mixing the water in the water tank and the acid in the acid tank, so that the iron element in the sludge is dissolved in the mixed liquid. A filling pipe for filling the sludge is arranged on the upper part of the material guide shell 11, and a first rotating shaft 13 is rotatably arranged on the upper part of the material guide shell 11. The first rotating shaft 13 is A support plate 14 is provided at the lower part of the shaft 13, and the support plate 14 is located below the guide shell 11, and the diameter of the support plate 14 is larger than the diameter of the lower end of the guide shell 11. A first fixing ring 15 and a second fixing ring 16 are fixedly connected in the shell 1. The support plate 14, the first fixing ring 15 and the second fixing ring 16 are arranged in sequence from top to bottom. A rotating frame 17 is rotatably provided between the first fixing ring 15 and the second fixing ring 16, and the rotating frame 17 is provided with screens distributed equidistantly in the circumferential direction. A driving motor 18 electrically connected to the control panel is fixedly connected to the bottom of the shell 1, and the output shaft of the driving motor 18 is fixedly connected to a second rotating shaft 19 that penetrates the shell 1 and is rotatably connected thereto. The second rotating shaft 19 Two first fixed plates 191 symmetrically distributed on the left and right are fixedly connected, and the two first fixed plates 191 are commonly fixedly connected with a rotating block 192, and the rotating block 192 is located in the rotating frame 17. The outer diameters of the rotating frame 17 and the rotating block 192 gradually decrease from the middle to the two ends. There is a gap between the rotating frame 17 and the rotating block 192, and the gap between the rotating frame 17 and the rotating block 192 gradually decreases from top to bottom. The left and right side walls of the shell 1 are respectively fixedly connected and connected with a first discharge shell 193 and a second discharge shell 195. The first discharge shell 193 is located above the second discharge shell 195, and the connecting port of the first discharge shell 193 and the shell 1 is located at the second fixed On the upper side of the fixed ring 16, a UV radiation unit 194 electrically connected to the control panel is installed on the first discharge shell 193, and the communication port between the second discharge shell 195 and the shell 1 is located below the second fixed ring 16. The second rotating shaft 19 is fixedly connected with a first fixed frame 196 for driving the sludge through the second discharge shell 195. A stirring mechanism for rotating the first rotating shaft 13 is provided on the guide shell 11, and a rotating mechanism for rotating the rotating frame 17 is provided in the shell 1. The liquid is injected into the sludge by the injection pipe 12 to mix with the sludge to extract the iron element in the sludge, and then the rotating frame 17 is rotated to remove the liquid and the UV radiation unit 194 is used to irradiate the filtrate to make Fe 3+ Transformed into Fe 2+ , thereby recycling the iron ions in Fenton iron-containing sludge and reducing unnecessary waste of resources.

[0032] like Figure 3As shown, the stirring mechanism includes a servo motor 2 electrically connected to the control panel, the servo motor 2 is fixed to the upper surface of the material guide shell 11, the output shaft of the servo motor 2 and the upper part of the first rotating shaft 13 are fixed with gears, the two gears are meshed, and the side wall of the lower part of the first rotating shaft 13 is rotatably provided with two groups of first stirring frames 21, each group of first stirring frames 21 includes two circumferentially equidistantly distributed, and the two groups of first stirring frames 21 are staggered, the upper surface of the material guide shell 11 is fixed with a second fixed frame 22, a rotating cavity is provided in the first rotating shaft 13, the second fixed frame 22 is located in the rotating cavity of the first rotating shaft 13, the opposite ends of the four first stirring frames 21 are fixed with bevel gears, the lower part of the second fixed frame 22 is fixed with two bevel gears, and the adjacent bevel gears are meshed.

[0033] like Figure 4 and Figure 5 As shown, the rotating mechanism includes a first fixed shell 3, which is fixedly connected to the shell body 1. The first fixed shell 3 is located between the support plate 14 and the first fixed ring 15. The upper end of the second rotating shaft 19 is fixedly connected to the first spur gear 31. The lower part of the first fixed shell 3 is rotatably provided with two second spur gears 32 symmetrically arranged front and back, and the two second spur gears 32 are both meshed with the first spur gear 31. The lower surface of the first fixed shell 3 is rotatably provided with a ring gear 33 fixedly connected to the rotating frame 17, and the ring gear 33 is meshed with the two second spur gears 32. The planetary gear set is used to make the rotating frame 17 and the rotating block 192 rotate in the opposite direction, so that the sludge mixture is evenly thrown onto the filter screen of the rotating frame 17.

[0034] Working principle: When sewage is degraded and processed by the Fenton oxidation process, the sewage is processed into sludge and water, wherein the sludge separated by the Fenton oxidation process contains a large amount of reusable iron ions, and the Fenton iron-containing sludge is subsequently added into the material guide shell 11 through the filling tube on the material guide shell 11, and then the operator starts the drive motor 18, the servo motor 2, the solenoid valves on the two injection pipes 12 and the ultraviolet radiation unit 194 through the control panel on the shell 1, wherein the two injection pipes 12 are connected to the water tank and the acid tank through pipelines respectively, and as the solenoid valves on the two injection pipes 12 are opened, the liquid in the water tank and the acid tank flows into the material guide shell 11 at a uniform speed.

[0035] During the process of acid and water entering the material guide shell 11, the servo motor 2 drives the first rotating shaft 13 and the four first stirring frames 21 to rotate through the gear set. At the same time, under the limiting effect of the bevel gear on the second fixed frame 22, the four first stirring frames 21 and the first rotating shaft 13 rotate circumferentially, and the four first stirring frames 21 rotate at the same time. The circumferential rotation and self-rotation of the four first stirring frames 21 stir and mix the two liquids and sludge in the material guide shell 11.

[0036] In the process of mixing the acid, water and sludge, the acid and water are mixed to form a liquid with a specified pH value, which is mixed with the sludge to dissolve the iron ions in the sludge into the mixed liquid. The mixture of the sludge and the mixed liquid then passes through the support plate 14 and the first fixed ring 15 into the space between the rotating frame 17 and the rotating block 192. At this time, the driving motor 18 drives the second rotating shaft 19 to rotate, and the second rotating shaft 19 drives the rotating block 192 to rotate counterclockwise (with the attached Figure 3 The second rotating shaft 19 rotates and drives the ring gear 33 and the rotating frame 17 to rotate clockwise (with the first spur gear 31 and the second spur gear 32) at the same time. Figure 3 Observed from the top direction).

[0037] The mixture of sludge and mixed liquid is attached to the screen of the rotating frame 17, and then the rotating frame 17 rotates to drive the mixture attached to the screen thereon to rotate. Under the centrifugal action of the rotation, the liquid in the mixture moves outward through the screen on the rotating frame 17, and the subsequent mixed liquid gathers on the upper surface of the second fixed ring 16. The gathered mixed liquid flows through the first discharge shell 193, and at this time, the ultraviolet radiation unit 194 works to remove Fe in the mixed liquid. 3+ Transformed into Fe 2+ , which contains Fe 2+ The solution flows back into the regulating tank in the Fenton oxidation process to be evenly mixed with the sewage, and then continues to treat the sewage through the existing Fenton oxidation system to complete the Fe 2+ Recycling, thereby reducing Fe 2+ waste, increase Fe 2+ The resource utilization rate is improved. The sludge after separation of the liquid falls to the bottom of the shell 1 through the rotating frame 17 and the lower end of the rotating block 192. Subsequently, the second rotating shaft 19 drives the first fixed frame 196 to rotate to discharge the sludge from the second discharge shell 195 to the next processing link. After completing the Fenton oxidation treatment operation of this batch of sewage, the operator turns off the drive motor 18, the servo motor 2, the solenoid valves on the two injection pipes 12 and the ultraviolet radiation unit 194 through the control panel, and repeats the above operation when treating the next batch of sewage.

[0038] Embodiment 2: Based on embodiment 1, Figure 2 and Figure 6As shown, it also includes a uniform speed discharging mechanism for controlling the amount of material falling. The uniform speed discharging mechanism is arranged on the first rotating shaft 13. The uniform speed discharging mechanism includes a second fixed plate 4. The second fixed plate 4 is fixedly connected to the side wall of the first rotating shaft 13, and the second fixed plate 4 is rotatably connected to the material guide shell 11. The inner wall of the material guide shell 11 is fixedly connected with a first rotating plate 41 and a second rotating plate 42. The first rotating plate 41 is located above the second rotating plate 42, and the first rotating plate 41 and the second rotating plate 42 are both contact-rotatably connected with the first rotating shaft 13 and the second fixed plate 4. The second fixed plate 4, the first rotating plate 41 and the second rotating plate 42 are all provided with through holes. The through holes on the first rotating plate 41 and the through holes on the second rotating plate 42 are staggered. An adjusting component for controlling the falling speed of the material is arranged on the first rotating shaft 13. The rotation of the second fixed plate 4 is used to control the falling amount of the sludge, so that it is mixed with equal proportions of water and equal proportions of acid solution, so that the iron element in the sludge is completely dissolved in the mixed solution.

[0039] like Figure 2 , Figure 6 and Figure 7 As shown, the adjustment component includes a rotating sleeve 5, which is rotatably arranged at the lower part of the first rotating shaft 13, and the rotating sleeve 5 penetrates the supporting plate 14 and is rotatably connected thereto. Two groups of second stirring frames 51 are fixedly connected to the upper part of the side wall of the rotating sleeve 5, and each group of second stirring frames 51 is four and equidistantly distributed in the circumferential direction, and the two groups of second stirring frames 51 are staggered with each other. A second fixed shell 52 is fixedly connected to the lower end of the first rotating shaft 13, and the second fixed shell 52 is fixedly connected to the supporting plate 14. A torsion spring is installed between the second fixed shell 52 and the rotating sleeve 5. Two left-right symmetrical fixed seats 53 are fixedly connected in the shell 1, and a sliding sleeve 54 slidably connected to the supporting plate 14 is slidably arranged between the two fixed seats 53. A rotating shell 55 is rotatably arranged at the lower part of the sliding sleeve 54, and the first rotating shaft 13 is provided with a spline groove. The rotating shell 55 is fixedly connected to a spline rod 56 sliding in the spline groove on the first rotating shaft 13. A guide rod 57 is fixedly connected to the lower surface of the rotating sleeve 5, and the second fixed shell 52 is provided with The guide rod 57 is located in the arc groove of the second fixed shell 52 and slides therein. In the initial state, the torsion spring between the second fixed shell 52 and the rotating sleeve 5 is in a force storage state, and the guide rod 57 is located at the left end of the arc groove on the second fixed shell 52. The rotating shell 55 is provided with an inclined groove that slides with the guide rod 57. The upper surface of the support plate 14 is set as a frustum, and the upper surface of the support plate 14 is fixedly connected with a first spiral plate 58. The first spiral plate 58 is located between the sliding sleeve 54 and the guide shell 11. The upper surface of the first spiral plate 58 is fixedly connected with a spirally distributed inclined baffle. The resistance generated when the second stirring frame 51 stirs the sludge is used to adjust the torsion state of the torsion spring between the second fixed shell 52 and the rotating sleeve 5. Subsequently, the sliding sleeve 54 is moved up through the connected components to extend the retention time of the sludge on the support plate 14, so that the second stirring frame 51 can repeatedly stir the sludge and mix it with the injection liquid, thereby improving the recovery rate of the iron element in the sludge.

[0040] Working principle: After the sludge is added into the guide shell 11, the sludge falls onto the upper surface of the first rotating plate 41, and then the first rotating shaft 13 rotates to drive the second fixed plate 4 to rotate, and the second fixed plate 4 rotates to rotate the through holes on it and gradually connect with the through holes on the first rotating plate 41. In this process, the through holes on the second fixed plate 4 are staggered with the through holes on the second rotating plate 42. In the process of connecting the through holes on the second fixed plate 4 and the through holes on the first rotating plate 41, the material on the first rotating plate 41 falls into the through holes of the second fixed plate 4 through the through holes on it until the sludge fills the through holes of the second fixed plate 4. Then the second fixed plate 4 rotates. The rotation causes the through holes on the upper plate to gradually break away from the connection with the through holes on the first rotating plate 41. After the through holes on the second fixed plate 4 are interlaced with the through holes on the first rotating plate 41, the second fixed plate 4 continues to rotate so that the through holes on the upper plate 4 are gradually connected with the through holes on the second rotating plate 42. At this time, the sludge in the through holes of the second fixed plate 4 falls below it through the through holes on the second rotating plate 42, and then cooperates with the evenly flowing water and acid in the two injection pipes 12 to mix, so that the sludge is fully dissolved in the liquid with a specified pH value, thereby ensuring that the iron ions in the sludge are completely dissolved in the mixed liquid, thereby indirectly improving the recycling rate of the iron ions in the device.

[0041] During the mixing process of water, acid liquid and sludge, the first rotating shaft 13 drives the four first stirring frames 21 to stir and mix the three. The first rotating shaft 13 rotates through the second fixed shell 52 and the torsion spring to drive the rotating sleeve 5 to rotate. The rotating sleeve 5 drives the second stirring frames 51 to rotate to stir the sludge. At this time, affected by the thinness and consistency of the sludge, the resistance encountered by the second stirring frame 51 during rotation is different.

[0042] When the sludge is thicker, the resistance on the second stirring frame 51 is larger, and the resistance on the second stirring frame 51 is larger than the torsion of the torsion spring on the rotating sleeve 5. At this time, when the first rotating shaft 13 is rotating, the second stirring frame 51 and the rotating sleeve 5 rotate relative to the first rotating shaft 13, that is, the rotating sleeve 5 drives the guide rod 57 to rotate in the arc groove of the second fixed shell 52. Because the rotation of the first rotating shaft 13 drives the rotating shell 55 and the spline rod 56 to move and rotate, when the rotating sleeve 5 drives the guide rod 57 to rotate relative to the first rotating shaft 13 and the rotating shell 55, the guide rod 57 squeezes the rotating shaft 13 and the rotating shell 55. The movable shell 55 is squeezed by the inclined groove, and the sliding sleeve 54 is driven to move upward by the rotating shell 55. The sliding sleeve 54 moves upward and cooperates with the support plate 14 to form a containing shell to collect the falling sludge and mixed liquid. Subsequently, under the continuous stirring action of the second stirring frame 51, the uniform mixing effect of the mixed liquid and the sludge is further prolonged, thereby further ensuring that the iron ions in the sludge are uniformly dissolved in the mixed liquid. When the sludge is relatively thin, the sliding sleeve 54 is restored to its initial state under the torsion force of the torsion spring on the rotating sleeve 5, so that the upper surface of the sliding sleeve 54 is flush with the upper surface of the support plate 14.

[0043] After the sliding sleeve 54 moves upward, the first rotating shaft 13 drives the first spiral plate 58 to rotate together through the second fixed shell 52 and the supporting plate 14. The first spiral plate 58 rotates to slowly lift the materials accumulated in the sliding sleeve 54. The lifted sludge and mixed liquid fall downward through the upper surface of the sliding sleeve 54. The fallen mixture enters between the rotating frame 17 and the rotating block 192, and then the above centrifugal dehydration operation is repeated. Subsequently, the ultraviolet radiation unit 194 is irradiated to complete the Fe 2+ The recovery operation contains Fe 2+ The liquid is added back to the existing Fenton oxidation process to achieve Fe 2+ Recycling to reduce resource waste.

[0044] Embodiment 3: Based on embodiment 2, Figure 3 and Figure 8 As shown, it also includes a centrifugal mechanism for increasing the centrifugal force of the material. The centrifugal mechanism is arranged on the rotating block 192. The centrifugal mechanism includes four first scrapers 6 distributed equidistantly in the circumferential direction. The four first scrapers 6 are fixedly connected to the upper part of the side wall of the rotating block 192. The four first scrapers 6 are inclined from top to bottom in a clockwise direction. The lower part of the side wall of the rotating block 192 is fixedly connected to six second scrapers 61 distributed equidistantly in the circumferential direction, and the first scrapers 6 and the second scrapers 61 are in contact and cooperate with the screen on the rotating frame 17. The rotating block 192 is provided with a flipping component for driving the movement of the material. The driving force of the first scraper 6 and the second scraper 61 during rotation is used to accelerate the downward movement of the sludge, and at the same time, the dehydration efficiency of the sludge by the screen on the rotating frame 17 is improved.

[0045] like Figure 8 and Fig. 9 As shown, the flip assembly includes a second spiral plate 7, which is rotatably arranged on the upper part of the rotating block 192, and the second spiral plate 7 is located between the rotating block 192 and the first scraper 6. The upper end of the rotating block 192 is rotatably provided with a rotating ring 71 fixedly connected to the second spiral plate 7. The lower surface of the rotating ring 71 is fixedly connected to a fixed sleeve 72. The fixed sleeve 72 is provided with two centrally symmetrical inclined grooves. The first fixed plate 191 is upper limit slidingly provided with a sliding rod 73 sliding in the adjacent inclined grooves on the fixed sleeve 72. The sliding rod 73 is connected to the adjacent first fixed plate 191. A spring is fixed between the lower surfaces of the fixed plates 191, and the spring is sleeved on the adjacent sliding rods 73. A third fixed frame 74 is fixed in the shell 1, and the third fixed frame 74 is located below the rotating block 192. The third fixed frame 74 is provided with an annular wavy surface, and the lower end of the sliding rod 73 is provided with a spherical surface. The annular wavy surface of the third fixed frame 74 is squeezed and matched with the spherical surfaces of all the sliding rods 73. The reciprocating rotation of the second spiral plate 7 relative to the rotating block 192 is utilized to make the sludge evenly adhere to the screen of the rotating frame 17, thereby improving the dehydration efficiency of the sludge.

[0046] Working principle: When the sludge and the mixed liquid pass between the rotating frame 17 and the rotating block 192, the rotating block 192 drives the four first scrapers 6 and the six second scrapers 61 to rotate together. The rotation of the four first scrapers 6 increases a driving force on the sludge, accelerating the liquid in the sludge to pass through the screen on the rotating frame 17. The first scraper 6 rotates and scrapes and drives the screen on the rotating frame 17 at the same time, avoiding the dehydrated sludge from clogging the screen on the rotating frame 17, thereby improving the continuous dehydration efficiency of the screen on the rotating frame 17.

[0047] In the above-mentioned sludge dehydration process, the second rotating shaft 19 simultaneously drives the first fixed plate 191, the sliding rod 73, the fixed sleeve 72, the rotating ring 71 and the second spiral plate 7 to rotate together. The second spiral plate 7 rotates to drive the sludge and the mixed liquid between the rotating frame 17 and the rotating block 192, and accelerates the sludge to move downward. In the rotation process of the two sliding rods 73, the two sliding rods 73 are limited by the annular wave surface on the third fixed frame 74. The connected springs are first moved upward, and the two sliding rods 73 move upward to squeeze the adjacent inclined grooves on the fixed sleeve 72, so that the fixed sleeve 72, the rotating ring 71 and the second spiral plate 7 are connected. The plate 7 rotates relative to the rotating block 192, and then, under the elastic force of the spring connected to the sliding rod 73, the two sliding rods 73 perform the above-mentioned reverse movement and reset, and finally the second spiral plate 7 follows the rotation of the rotating block 192, and the second spiral plate 7 reciprocates at a small angle relative to the rotating block 192. At this time, the reciprocating rotation of the second spiral plate 7 facilitates the sludge and mixed liquid close to the rotating block 192 to be driven to the opposite side of the rotation of the first scraper 6, so that the sludge and mixed liquid contact with the screen of the rotating frame 17, thereby improving the separation effect of the screen on the rotating frame 17 on the liquid in the sludge, thereby reducing the waste of iron ions.

[0048] Embodiment 4: Based on the embodiment 3, Figure 1-Figure 9 As shown, the present invention also provides a method for recycling Fenton iron-containing sludge, based on the above-mentioned Fenton iron-containing sludge recycling device, specifically comprising the following steps:

[0049] S1: First, connect the two injection pipes 12 to the water tank and the acid tank, then start the drive motor 18, the servo motor 2, the solenoid valves on the two injection pipes 12 and the ultraviolet radiation unit 194, and then add the sludge treated by the existing Fenton oxidation process into the material guide shell 11;

[0050] S2: After the sludge enters the guide shell 11, the sludge is mixed with the water and acid flowing out of the two injection pipes 12, and the servo motor 2 drives the first rotating shaft 13, the first stirring frame 21, the rotating sleeve 5 and the second stirring frame 51 to rotate through the connected components to stir and mix the sludge, water and acid, so that the iron ions in the sludge are dissolved in the mixed liquid;

[0051] S3: The mixed mixture overflows from the sliding sleeve 54 under the rotation of the first spiral plate 58, and then falls between the rotating frame 17 and the rotating block 192;

[0052] S4: The mixture falls between the rotating frame 17 and the rotating block 192. Under the operation of the driving motor 18, the driving motor 18 drives the rotating frame 17 and the rotating block 192 to rotate through the connected parts. The rotation of the rotating block 192 drives the first scraper 6, the second scraper 61 and the second spiral plate 7 to rotate accordingly. In this process, the second spiral plate 7 reciprocates relative to the rotating block 192 at the same time, so that the liquid in the mixture attached to the screen on the rotating frame 17 flows outward, and the liquid after subsequent separation flows out from the first discharge shell 193 through the second fixed ring 16. The dehydrated sludge falls to the bottom of the shell 1 through the interval of the rotating frame 17 and the rotating block 192, and the dehydrated sludge is discharged from the second discharge shell 195;

[0053] S5: The liquid discharged from the first discharge shell 193 passes through the ultraviolet radiation unit 194, and the ultraviolet radiation unit 194 works to separate Fe 3+ Transformed into Fe 2+ The liquid is then redirected to the existing Fenton oxidation process to complete the Fe 2+ recycling.

[0054] While the embodiments of the invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A Fenton iron-containing sludge recycling device, characterized in that: The invention comprises a shell (1), wherein a material guide shell (11) is embedded in the upper part of the shell (1), and two injection pipes (12) for installing electromagnetic valves are fixedly connected to the side wall of the material guide shell (11), and a first rotating shaft (13) is rotatably provided on the material guide shell (11), and the first rotating shaft (13) is provided with a supporting plate (14), and the shell (1) is fixedly connected with a first fixing ring (15) and a second fixing ring (16), and a rotating frame (17) is rotatably provided between the first fixing ring (15) and the second fixing ring (16), and the rotating frame (17) is provided with screens distributed equidistantly in the circumferential direction, and a driving motor (18) is fixedly connected to the bottom of the shell (1), and the output shaft of the driving motor (18) is fixedly connected with a second rotating shaft (19) rotatably connected to the shell (1), and the second rotating shaft (19) is fixedly connected with second rotating shafts (19) symmetrically distributed. a fixed plate (191), the first fixed plates (191) being symmetrically distributed and fixedly connected to a rotating block (192); a first discharge shell (193) and a second discharge shell (195) being connected to the side wall of the shell (1); a communication port between the first discharge shell (193) and the shell (1) being located on the upper side of the second fixed ring (16); an ultraviolet radiation unit (194) being installed on the first discharge shell (193); a communication port between the second discharge shell (195) and the shell (1) being located below the second fixed ring (16); a first fixed frame (196) being fixedly connected to the second rotating shaft (19); a stirring mechanism for rotating the first rotating shaft (13) being arranged on the guide shell (11); and a rotating mechanism for rotating the rotating frame (17) being arranged in the shell (1); The stirring mechanism comprises a servo motor (2), the servo motor (2) is fixedly connected to the material guide shell (11), the output shaft of the servo motor (2) and the first rotating shaft (13) are driven by a gear set, the side wall of the first rotating shaft (13) is rotatably provided with a first stirring frame (21) distributed equidistantly in the circumferential direction, the material guide shell (11) is fixedly connected with a second fixed frame (22), a rotating cavity is provided in the first rotating shaft (13), the second fixed frame (22) is located in the rotating cavity of the first rotating shaft (13), and the first stirring frames (21) distributed equidistantly in the circumferential direction are all driven by the second fixed frame (22) via a bevel gear set; The invention also comprises a uniform speed material discharging mechanism for controlling the amount of material falling, the uniform speed material discharging mechanism being arranged on the first rotating shaft (13), the uniform speed material discharging mechanism comprising a second fixed plate (4), the second fixed plate (4) being fixedly connected to the first rotating shaft (13), and the second fixed plate (4) being rotatably connected to the material guide shell (11), the material guide shell (11) being fixedly connected with a first rotating plate (41) and a second rotating plate (42) both being rotatably connected to the first rotating shaft (13), the first rotating plate (41) and the second rotating plate (42) being respectively located on both sides of the second fixed plate (4), and the first rotating plate (41) and the second rotating plate (42) both being in contact with and cooperating with the second fixed plate (4), the second fixed plate (4), the first rotating plate (41) and the second rotating plate (42) being all provided with through holes, the through holes on the first rotating plate (41) and the through holes on the second rotating plate (42) being staggeredly distributed, and an adjusting component for controlling the material falling speed being provided on the first rotating shaft (13); The adjusting assembly comprises a rotating sleeve (5), the rotating sleeve (5) being rotatably arranged on the first rotating shaft (13), the rotating sleeve (5) penetrating the supporting plate (14) and being rotatably connected thereto, the rotating sleeve (5) being fixedly connected to second stirring frames (51) distributed equidistantly in the circumferential direction, the first rotating shaft (13) being fixedly connected to a second fixed shell (52) fixedly connected to the supporting plate (14), a torsion spring being installed between the second fixed shell (52) and the rotating sleeve (5), a symmetrical fixed seat (53) being fixedly connected inside the housing (1), and a symmetrical The fixed seat (53) is slidably provided with a sliding sleeve (54), the sliding sleeve (54) is rotatably provided with a rotating shell (55), the rotating shell (55) is fixedly connected to a spline rod (56), the first rotating shaft (13) is provided with a spline groove which is limitedly slidably connected to the spline rod (56), the rotating sleeve (5) is fixedly connected to a guide rod (57), the second fixed shell (52) is provided with an arc groove which is slidably matched with the guide rod (57), and the rotating shell (55) is provided with an inclined groove which is slidably matched with the guide rod (57).

2. The recycling device of Fenton iron-containing sludge according to claim 1 is characterized in that: The outer diameters of the rotating frame (17) and the rotating block (192) gradually decrease from the middle to the two ends, a gap exists between the rotating frame (17) and the rotating block (192), and the gap between the rotating frame (17) and the rotating block (192) gradually decreases from top to bottom.

3. A Fenton iron-containing sludge recycling device according to claim 2, characterized in that: The rotating mechanism comprises a first fixed shell (3), the first fixed shell (3) is fixedly connected to the housing (1), the first fixed shell (3) is located below the support plate (14), and the first fixed shell (3) is located above the first fixed ring (15), the second rotating shaft (19) is fixedly connected to a first spur gear (31), the first fixed shell (3) is rotatably provided with a second spur gear (32) meshing with the first spur gear (31), the first fixed shell (3) is rotatably provided with a gear ring (33) meshing with the second spur gear (32), and the gear ring (33) is fixedly connected to the rotating frame (17).

4. A Fenton iron-containing sludge recycling device according to claim 3, characterized in that: The upper surface of the support plate (14) is configured as a frustum, and a first spiral plate (58) is fixedly connected to the upper surface of the support plate (14). The first spiral plate (58) is located between the sliding sleeve (54) and the material guide shell (11), and a spirally distributed inclined baffle is fixedly connected to the upper surface of the first spiral plate (58).

5. A Fenton iron-containing sludge recycling device according to claim 4, characterized in that: The invention also comprises a centrifugal mechanism for increasing the centrifugal force of the material, the centrifugal mechanism being arranged on the rotating block (192), the centrifugal mechanism comprising first scrapers (6) distributed equidistantly in the circumferential direction, the first scrapers (6) distributed equidistantly in the circumferential direction being fixedly connected to the side wall of the rotating block (192), the rotating block (192) being fixedly connected with second scrapers (61) distributed equidistantly in the circumferential direction, the second scrapers (61) being located below the first scrapers (6), and the first scrapers (6) and the second scrapers (61) being in contact with and cooperating with the screen on the rotating frame (17), and the rotating block (192) being provided with a flipping assembly for driving the material to move.

6. The recycling device for Fenton iron-containing sludge according to claim 5, characterized in that: The flipping assembly comprises a second spiral plate (7), the second spiral plate (7) being rotatably arranged on the rotating block (192), and the second spiral plate (7) being located between the rotating block (192) and the first scraper (6), the rotating block (192) being rotatably arranged with a rotating ring (71), the rotating ring (71) being fixedly connected to the second spiral plate (7), the rotating ring (71) being fixedly connected with a fixing sleeve (72), the fixing sleeve (72) being provided with a centrally symmetrical inclined groove, and the first fixing plate (191) A sliding rod (73) is slidably provided, the sliding rod (73) is located in an adjacent inclined groove on the fixing sleeve (72) and slides, a spring is fixedly connected between the sliding rod (73) and the adjacent first fixing plate (191), a third fixing frame (74) is fixedly connected in the shell (1), the third fixing frame (74) is located below the rotating block (192), the third fixing frame (74) is provided with an annular wavy surface, and the annular wavy surface of the third fixing frame (74) is extruded and matched with all the sliding rods (73).

7. A method for recycling Fenton iron-containing sludge, according to the device for recycling Fenton iron-containing sludge according to claim 6, characterized in that: The specific steps include: S1: First, two injection pipes (12) are connected to the water tank and the acid tank, and then the drive motor (18), the servo motor (2), the solenoid valves on the two injection pipes (12) and the ultraviolet radiation unit (194) are started, and then the sludge treated by the existing Fenton oxidation process is added into the guide shell (11); S2: After the sludge enters the guide shell (11), the sludge is mixed with the water and acid solution flowing out of the two injection pipes (12), and the servo motor (2) drives the first rotating shaft (13), the first stirring frame (21), the rotating sleeve (5) and the second stirring frame (51) to rotate through the connected components to stir and mix the sludge, water and acid solution, so that the iron ions in the sludge are dissolved in the mixed solution; S3: the mixed mixture overflows from the sliding sleeve (54) under the rotation of the first spiral plate (58), and the mixture subsequently falls between the rotating frame (17) and the rotating block (192); S4: The mixture falls between the rotating frame (17) and the rotating block (192). Under the operation of the driving motor (18), the driving motor (18) drives the rotating frame (17) and the rotating block (192) to rotate through the connected parts. The rotating block (192) rotates and drives the first scraper (6), the second scraper (61) and the second spiral plate (7) to rotate accordingly. In this process, the second spiral plate (7) simultaneously reciprocates relative to the rotating block (192), so that the liquid in the mixture attached to the screen on the rotating frame (17) flows outward. The separated liquid subsequently flows out of the first discharge shell (193) through the second fixed ring (16). The dehydrated sludge falls to the bottom of the housing (1) through the interval between the rotating frame (17) and the rotating block (192). The dehydrated sludge is discharged from the second discharge shell (195); S5: The liquid discharged from the first discharge shell (193) passes through the ultraviolet radiation unit (194), and the ultraviolet radiation unit (194) works to separate Fe 3+ Transformed into Fe 2+ The liquid is then redirected to the existing Fenton oxidation process to complete the Fe 2+ recycling.

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