A sludge heavy metal resource recovery device

Abstract

The present invention relates to the technical field of sludge treatment, and in particular to a sludge heavy metal resource recovery device, comprising a leaching and separation unit composed of a leaching structure and a separation structure; the leaching structure is used to mix the sludge that has been filtered and the leaching liquid; the separation structure is used to perform filter pressing treatment on the sludge that has been leached; wherein the separation structure comprises: by adopting extrusion, vacuum water absorption and centrifugal filter pressing to realize the filter pressing and separation of sewage containing liquid phase heavy metals in the sludge, the separation effect can be effectively improved, the water content of the sludge can be reduced, thereby improving the heavy metal recovery rate, and this treatment method can realize continuous and uninterrupted operation, thereby greatly improving the sludge treatment efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, and in particular to a sludge heavy metal resource recovery device. Background Art

[0002] With the acceleration of global industrialization and urbanization, the amount of sludge generated by sewage treatment plants has increased year by year. The sludge contains a large amount of organic matter, inorganic matter and various harmful substances. Among them, heavy metals (such as copper, zinc, lead, chromium, nickel, etc.) are one of the main environmental pollutants. If these heavy metals are directly discharged into the environment without treatment, they may cause long-term pollution to the soil, water bodies and ecosystems, threatening human health and ecological balance.

[0003] At the same time, heavy metals are also a valuable resource. Many heavy metals are widely used in industry, electronics, metallurgy and other fields. However, due to their limited natural resource reserves, recycling has become an important way to solve resource shortages and environmental pollution. Therefore, how to efficiently and environmentally friendly recover heavy metal resources from sludge has become a key issue that needs to be solved urgently.

[0004] Since heavy metals mostly exist in sludge in ionic or chemical states, the traditional heavy metal recovery method requires first filtering the fluid sludge to separate the larger impurities, and then using chemical leaching (using acid, alkali, chelating agent, etc.) to dissolve the metal ions from the solid matrix and enter the liquid phase, and then use solid-liquid separation to separate the wastewater containing heavy metal ions from the sludge, and finally separate the heavy metals from the wastewater through solvent extraction, ion exchange, chemical precipitation, etc.

[0005] In the process of solid-liquid separation, filter press is often used to complete the separation work. The sludge is separated from the wastewater containing dissolved heavy metals by a filter press. However, this separation method only uses the pump body to pressurize the fluid to achieve pressure supply. Its separation method is single, functionality is poor, and the solid-liquid separation effect is poor. In addition, its continuous processing capacity is insufficient and frequent switching on and off is required. Therefore, this type of equipment has gradually failed to meet the needs of modern industry. Summary of the invention

[0006] In view of the above technical problems, the present invention provides a sludge heavy metal resource recovery device, the specific technical solution adopted by the device is:

[0007] According to a first aspect of the present invention, there is provided a sludge heavy metal resource recovery device, comprising a leaching and separation unit composed of a leaching structure and a separation structure;

[0008] The leaching structure is used to mix the filtered sludge and the leaching liquid;

[0009] The separation structure is used to perform filter press treatment on the sludge that has undergone leaching treatment;

[0010] Wherein, the separation structure comprises:

[0011] A short barrel is used to store sludge, the axis of the short barrel is vertical, a discharge pipe for discharging materials and a drainage structure for draining water are arranged at the bottom of the short barrel, and a guide pipe connected to the leaching structure is arranged at the top of the short barrel;

[0012] A filter ring is located in the short barrel, the filter ring divides the internal space of the short barrel into an inner water storage chamber and an outer storage chamber, the axis of the filter ring is parallel to the axis of the short barrel and deviates from each other, the top of the filter ring extends out of the short barrel, and the filter ring rotates on the short barrel;

[0013] A top plate is located inside the filter ring, and the top plate is coplanar with the upper surface of the short barrel;

[0014] A rotating drum is coaxial with the short barrel, the rotating drum passes through the short barrel and the top plate, and the rotating drum and the filter ring define the position of the top plate;

[0015] A plurality of baffles are distributed in a ring shape on the inner side of the short barrel, and one end of the baffle is connected to the outer wall of the drum, and the other end of the baffle contacts the inner wall of the short barrel. The baffle slides through the filter ring, and the baffle separates the water storage chamber and the storage chamber where it is located.

[0016] In some embodiments of the present invention, a lever is slidably inserted into the rotating drum outside the short barrel, the lever moves along the radial direction of the rotating drum, and the end of the lever is rotatably connected to the filter ring.

[0017] In some embodiments of the present invention, the baffle comprises:

[0018] A first rotating column, rotatably mounted on the outer wall of the rotating drum;

[0019] A receiving slot plate is fixed on the outer wall of the first rotating column;

[0020] An insert plate is coplanar with the receiving slot plate, one end of the insert plate is slidably inserted into the receiving slot plate and connected to each other through a spring sheet;

[0021] The second rotating column is rotatably embedded in the filter ring, the axis of the second rotating column is parallel to the axis of the filter ring, and the other end of the insert plate slides through the second rotating column and is in sliding contact with the inner wall of the short barrel.

[0022] In some embodiments of the present invention, a plurality of air holes are formed on the inner wall of the rotating drum, and the air holes are connected to the receiving slot plate through the first rotating column.

[0023] In some embodiments of the present invention, a plurality of material openings are provided on the inner wall of the drum, and the material openings are communicated with the storage chambers between two adjacent baffles;

[0024] The drainage structure comprises:

[0025] A fixed cylinder is located inside the rotating cylinder, and the air hole is located above the fixed cylinder;

[0026] An opening is provided on the fixed cylinder;

[0027] A fixed plate, fixedly connected between the fixed cylinder and the short barrel;

[0028] Among them, the outer wall of the fixed cylinder is used to seal the material opening, and when the rotating cylinder rotates and moves the material opening to the opening position, the material opening is connected with the opening.

[0029] In some embodiments of the present invention, the number of the leaching and separation units is at least two, and they are connected in sequence. The first leaching and separation unit is used for leaching the sludge, and the remaining leaching and separation units are used for washing the sludge.

[0030] In some embodiments of the present invention, a water supply pipe is provided on the upper surface of the short barrel on the leaching separation unit used for leaching, and the water supply pipe is collinear with the discharge pipe in the vertical direction.

[0031] In some embodiments of the present invention, the leaching structure comprises:

[0032] A leaching tank, used for storing sludge, wherein the leaching tank is provided with a circular corridor, the axis of which is vertical;

[0033] A feed pipe, installed on the top of the leaching tank and connected to the annular gallery;

[0034] Partitions, installed in the circular corridor and used to divide the circular corridor;

[0035] A stirring structure is installed in the annular corridor and is used to make the sludge move along the annular corridor, and the sludge performs vertical circular motion on the vertical section of the annular corridor;

[0036] Among them, the material guide pipe is installed at the bottom of the leaching box, and the material guide pipe and the feed pipe are respectively located on both sides of the partition. The two adjacent groups of leaching separation units are connected through the discharge pipe and the feed pipe. The side wall of the feed pipe on the leaching separation unit used for leaching is connected with a liquid supply pipe, which is used to supply leaching liquid into the feed pipe.

[0037] In some embodiments of the present invention, the stirring structure comprises:

[0038] A core column, the core column is vertical, and the core column rotates vertically and is inserted in the middle of the leaching box, one end of the core column is connected to the rotating drum, and the other end of the core column is provided with a motor, and the motor is fixed on the leaching box, and the partition is in sliding contact with the core column;

[0039] An outer cylinder is located in the leaching box, a notch is formed on the end surface of the partition facing the core column, and the outer cylinder passes through the notch;

[0040] A plurality of push plates are located between the core column and the outer cylinder. The push plates are used to connect the core column and the outer cylinder, and the push plates are inclined.

[0041] In some embodiments of the present invention, the thickness of the partition is greater than the width of the space between two adjacent pusher plates along a direction perpendicular to the partition.

[0042] In some embodiments of the present invention, a plurality of stirring rods are provided on the inner wall of the leaching tank.

[0043] In some embodiments of the present invention, a regulating valve is provided on the liquid supply pipe, a gear is provided at the end of the valve stem of the regulating valve, the gear and the regulating valve are connected by a spring, and a rack is meshed on the gear;

[0044] A sealing plate is arranged in the feed pipe to rotate downwardly, a connecting rod is arranged on the bottom surface of the sealing plate to rotate upwardly, a movable rod is arranged on the end of the connecting rod away from the sealing plate to rotate horizontally, and the end of the movable rod slides horizontally through the feed pipe and is fixedly connected to the rack.

[0045] The beneficial effects of the present invention are:

[0046] By adopting the methods of extrusion, vacuum water absorption and centrifugal filtration to achieve the filtration separation of sewage containing liquid heavy metals in the sludge, the separation effect can be effectively improved, the water content of the sludge can be reduced, thereby increasing the heavy metal recovery rate, and this treatment method can achieve continuous and uninterrupted operation, thereby greatly improving the sludge treatment efficiency. Since this case only needs to utilize the relative eccentric setting of the filter ring and the short barrel, and the coaxial setting of the rotating drum and the short barrel to achieve the above functions, it has the characteristics of simple structure, strong functionality, convenient maintenance, low cost and small space occupation. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 It is a schematic diagram of the structure of the present invention;

[0049] Figure 2 is a schematic structural diagram of a leaching and separation unit in an embodiment of the present invention;

[0050] Figure 3is a structural schematic diagram of a separation structure in an embodiment of the present invention;

[0051] Figure 4 yes Figure 3 Schematic diagram of the structure viewed from above;

[0052] Figure 5 Schematic diagram of the explosion structure of the separation structure in the embodiment of the present invention;

[0053] Figure 6 is a schematic structural diagram of a filter ring in an embodiment of the present invention;

[0054] Figure 7 is a schematic structural diagram of a baffle in an embodiment of the present invention;

[0055] Figure 8 2 is a schematic diagram of the structure of a rotating drum in an embodiment of the present invention;

[0056] Fig. 9 is a structural schematic diagram of a drainage structure in an embodiment of the present invention;

[0057] Fig.10 is a schematic structural diagram of a leaching structure in an embodiment of the present invention;

[0058] Fig.11 This is a schematic diagram of the cross-sectional structure of the leaching box in an embodiment of the present invention;

[0059] Fig.12 Schematic diagram of the structure of the feed pipe in the embodiment of the present invention.

[0060] Reference numerals:

[0061] 100. Leaching and separation unit;

[0062] 200, leaching structure; 201, leaching box; 202, feed pipe; 203, liquid supply pipe; 204, partition; 205, core column; 206, outer cylinder; 207, push plate; 208, motor; 209, stirring rod; 210, regulating valve; 211, gear; 212, spring; 213, rack; 214, sealing plate; 215, connecting rod; 216, movable rod;

[0063] 300, separation structure; 301, short barrel; 302, filter ring; 303, top plate; 304, rotating drum; 305, baffle; 306, discharge pipe; 307, drainage structure; 308, material guide pipe; 309, lever; 310, first rotating column; 311, storage slot plate; 312, plug plate; 313, spring piece; 314, second rotating column; 315, air hole; 316, material port; 317, fixed drum; 318, opening; 319, fixed plate; 320, water supply pipe. DETAILED DESCRIPTION

[0064] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0065] like Figures 1 to 4 As shown, a sludge heavy metal resource recovery device of the present invention includes a leaching and separation unit 100 composed of a leaching structure 200 and a separation structure 300;

[0066] The leaching structure 200 is used to mix the filtered sludge and the leaching liquid;

[0067] The separation structure 300 is used to perform filter press treatment on the sludge that has undergone leaching treatment;

[0068] Wherein, the separation structure 300 comprises:

[0069] A short barrel 301 is used to store sludge. The axis of the short barrel 301 is vertical. A discharge pipe 306 for discharging materials and a drainage structure 307 for draining water are provided at the bottom of the short barrel 301. A guide pipe 308 connected to the leaching structure 200 is provided at the top of the short barrel 301.

[0070] The filter ring 302 is located in the short barrel 301. The filter ring 302 divides the internal space of the short barrel 301 into an inner water storage chamber and an outer storage chamber. The axis of the filter ring 302 is parallel to the axis of the short barrel 301 and deviates from each other. The top of the filter ring 302 extends out of the short barrel 301. The filter ring 302 rotates on the short barrel 301.

[0071] A top plate 303 is located inside the filter ring 302, and the top plate 303 is coplanar with the upper surface of the short barrel 301;

[0072] The rotating drum 304 is coaxial with the short barrel 301 , and passes through the short barrel 301 and the top plate 303 , and the rotating drum 304 and the filter ring 302 define the position of the top plate 303 ;

[0073] A plurality of baffles 305 are distributed in an annular shape inside the short barrel 301, and one end of the baffle 305 is connected to the outer wall of the drum 304, and the other end of the baffle 305 is in contact with the inner wall of the short barrel 301. The baffle 305 slides through the filter ring 302, and the baffle 305 separates the water storage chamber and the storage chamber where it is located;

[0074] The space between two adjacent baffles 305 is isolated from other spaces, and the space isolated here includes part of the water storage room and part of the storage room. Here, part of the water storage room between two adjacent baffles 305 is set as a storage room, and part of the storage room between two adjacent baffles 305 is set as an extrusion room. Since the filter ring 302 deviates from the axis of the short barrel 301, and the rotating drum 304 is coaxial with the short barrel 301, as the filter ring 302, the rotating drum 304 and the plurality of baffles 305 rotate, the storage room between two adjacent baffles 305 will repeatedly increase and decrease, and the extrusion room between two adjacent baffles 305 will repeatedly decrease and increase. In addition, due to the arrangement of the filter ring 302 and the rotating drum 304, the top plate 303 can be fixed, that is, the position of the top plate 303 is stationary relative to the short barrel 301.

[0075] When in use, the filtered sludge will enter the leaching structure 200, and the leachate will also be supplied to the leaching structure 200. The leaching structure 200 mixes the sludge and the leachate, and the leachate dissolves the heavy metal ions in the sludge from the solid matrix and enters the liquid phase. Then, the leaching structure 200 will continuously introduce the mixture into the area where the distance between the outer wall of the filter ring 302 and the inner wall of the short barrel 301 is the largest in the short barrel 301 through the guide pipe 308, that is, the mixture enters the largest extrusion chamber in the short barrel 301. As the filter ring 302 and the rotating drum 304 rotate, multiple baffles 305 rotate synchronously, and the baffles 305 will push the mixture to move along the inner wall of the short barrel 301. Since the filter ring 302 is eccentric to the short barrel 301, the space of the extrusion chamber will gradually become smaller, and the space in the corresponding storage chamber will increase. The outer wall of the filter ring 302 will directly extrude the mixture and make the mixture Wastewater containing heavy metals passes through the filter ring 302 and enters the storage chamber. At the same time, due to the increase in space in the storage chamber, it will use the negative pressure effect formed by the increase in space to suck the wastewater into the storage chamber. Of course, initially, due to the continuous replenishment of wastewater into the storage chamber, this negative pressure effect is small. As the water content in the mixture decreases and the density of the mixture increases, this negative pressure effect will gradually increase. At the same time, due to the baffle 305 pushing the centrifugal rotation of the mixture in the short barrel 301, the sludge in the mixture will gather and condense toward the inner wall of the short barrel 301, thereby further improving the filter pressing effect. When the sludge filter pressing is completed, the sludge is discharged through the discharge pipe 306, and the wastewater can be discharged through the drainage structure 307. After discharge, the extrusion chamber and the storage chamber will gradually reset and move to the position of the guide pipe 308 with the movement of the filter ring 302. Therefore, this treatment method can achieve a continuous filter pressing and separation effect on the sludge.

[0076] Since the filter ring 302 and the drum 304 are connected by a plurality of baffles 305, in order to ensure that the plurality of baffles 305 can move normally when the filter ring 302 and the drum 304 are in periodic motion, it is necessary to make the filter ring 302 and the drum 304 move synchronously, and when the filter ring 302 rotates one circle, the drum 304 also rotates one circle. To achieve this effect, it is necessary to adopt the following method: Figure 3 The structure shown in the figure, that is, a lever 309 is slidably inserted into the rotating drum 304 outside the short barrel 301, and the lever 309 moves along the radial direction of the rotating drum 304. The end of the lever 309 is rotatably connected to the filter ring 302, so that when the rotating drum 304 rotates, it will drive the filter ring 302 to rotate synchronously through the lever 309.

[0077] When the filter ring 302 and the drum 304 move, since the filter ring 302 and the drum 304 are relatively eccentric, the baffle 305 needs to play the role of isolating the space at all times, so the baffle 305 needs to be specially configured, such as Figures 5 to 7 As shown, the baffle 305 includes:

[0078] A first rotating column 310 is rotatably mounted on the outer wall of the rotating drum 304;

[0079] The receiving slot plate 311 is fixed on the outer wall of the first rotating column 310;

[0080] The plug plate 312 is coplanar with the storage slot plate 311, and one end of the plug plate 312 is slidably inserted into the storage slot plate 311 and connected to each other through the spring piece 313;

[0081] The second rotating column 314 is rotatably embedded in the filter ring 302 , the axis of the second rotating column 314 is parallel to the axis of the filter ring 302 , and the other end of the plug plate 312 slides through the second rotating column 314 and slides in contact with the inner wall of the short barrel 301 ;

[0082] Since the peripheral speeds of the filter ring 302 and the drum 304 are consistent, but their angular speeds are always different, the baffle 305 needs to be able to move relative to the filter ring 302 and the drum 304, and the baffle 305 may not be coplanar with the axis of the short barrel 301. The baffle 305 needs to have a retractable effect. The first rotating column 310 can allow the storage slot plate 311 and the drum 304 to rotate relative to each other. The second rotating column 314 can allow the plug plate 312 and the filter ring 302 to rotate relative to each other. The spring piece 313 can allow the storage slot plate 311 and the plug plate 312 to slide relative to each other, thereby allowing the baffle 305 to be able to telescopically move. In this way, the surface formed by the storage slot plate 311 and the plug plate 312 can move relative to the filter ring 302 and the drum 304, and the storage slot plate 311 and the plug plate 312 can always have an isolation effect.

[0083] like Figure 8As shown, a plurality of air holes 315 are formed on the inner wall of the rotating drum 304, and the air holes 315 are connected to the receiving slot plate 311 through the first rotating column 310;

[0084] When the plug board 312 moves in the storage slot plate 311, the internal space of the storage slot plate 311 will change. At this time, the air hole 315 can be used to connect the air inside the storage slot plate 311 with the outside air, thereby ensuring that the air pressure inside the storage slot plate 311 is at normal pressure, avoiding the normal operation of the plug board 312 being affected by the air pressure when the storage slot plate 311 is closed, and improving the operating stability of the equipment.

[0085] like Figures 8 to 9 As shown, a plurality of material openings 316 are provided on the inner wall of the rotating drum 304, and the material openings 316 are communicated with the storage chamber between two adjacent baffles 305;

[0086] The drainage structure 307 includes:

[0087] A fixed cylinder 317 is located inside the rotating cylinder 304, and the air hole 315 is located above the fixed cylinder 317;

[0088] An opening 318 is provided on the fixing tube 317;

[0089] A fixing plate 319 is fixedly connected between the fixing cylinder 317 and the short barrel 301;

[0090] Among them, the outer wall of the fixed cylinder 317 is used to seal the material port 316. When the rotating cylinder 304 rotates and moves the material port 316 to the opening 318, the material port 316 is connected with the opening 318, so that the waste water in the storage chamber can be discharged through the material port 316, the opening 318 and the fixed cylinder 317. During normal filter pressing operation, the sealing work of the fixed cylinder 317 on the material port 316 can ensure that the storage chamber is not connected with the outside world, and the storage chamber remains in an isolated state. The outside air can flow to the air hole 315 through the fixed cylinder 317. The fixed plate 319 can support and fix the fixed cylinder 317, and the short barrel 301 can be directly installed on the external bracket, workbench and other positions.

[0091] Since some wastewater still exists in the sludge after filter pressing, and the wastewater contains a certain amount of heavy metals, in order to further improve the recovery rate of heavy metals, the sludge needs to be washed. Figure 1As shown, the number of the leaching and separation units 100 is set to at least two groups, and they are connected in sequence. The first leaching and separation unit 100 is used to leaching the sludge, and the remaining leaching and separation units 100 are used to wash the sludge, so that the heavy metal content in the washed sludge is reduced. The connection relationship between the two adjacent groups of leaching and separation units 100 can be achieved through the discharge pipe 306, that is, after one group of leaching and separation units 100 completes the sludge treatment, it can be discharged into the next group of leaching and separation units 100 through the discharge pipe 306.

[0092] The upper surface of the short barrel 301 on the leaching separation unit 100 used for leaching is connected to a water supply pipe 320, and the water supply pipe 320 and the discharge pipe 306 are in the same line in the vertical direction. Water is introduced into the short barrel 301 through the water supply pipe 320. The water can flush the sludge that has completed the filter pressing treatment and allow it to enter the discharge pipe 306, so that the sludge can be discharged smoothly, avoiding the sludge after the filter pressing being too hard and unable to be discharged naturally from the short barrel 301, thereby facilitating the discharge work. The sludge flushed by water will directly enter the next group of leaching separation units 100, so there is no need to add a water supply structure for the next group of leaching separation units 100, and the water supply operation can be directly realized by using the water supply pipe 320.

[0093] In order to improve the sludge leaching effect and reduce the equipment volume, the leaching structure 200 can be used as follows Figure 10 to Figure 11 The structure shown, the leaching structure 200 includes:

[0094] The leaching tank 201 is used to store sludge, and the leaching tank 201 is internally provided with an annular corridor, and the axis of the annular corridor is vertical;

[0095] A feed pipe 202, installed on the top of the leaching tank 201 and connected to the annular corridor;

[0096] Partition plate 204, installed in the circular corridor and used to separate the circular corridor;

[0097] A stirring structure is installed in the annular corridor and is used to make the sludge move along the annular corridor, and the sludge performs vertical circular motion on the vertical section of the annular corridor;

[0098] Among them, the guide pipe 308 is connected and installed at the bottom of the leaching box 201, and the guide pipe 308 and the feed pipe 202 are respectively located on both sides of the partition 204, and the two adjacent groups of leaching separation units 100 are connected through the discharge pipe 306 and the feed pipe 202. The side wall of the feed pipe 202 on the leaching separation unit 100 used for leaching is connected with a liquid supply pipe 203, and the liquid supply pipe 203 is used to supply leaching liquid into the feed pipe 202, while the feed pipe 202 on the leaching separation unit 100 used for water washing does not need to be provided with a liquid supply pipe 203; when the sludge is passed into the feed pipe 202, the liquid supply pipe 203 synchronously supplies the leaching liquid into the feed pipe 202, and the mixture of the leaching liquid and the sludge synchronously flows into the partition 204 in the leaching box 201. On the other hand, by utilizing the stirring structure, the mixture can be moved along the annular corridor in the leaching box 201, that is, the mixture moves from one side of the partition 204 to the other side of the partition 204 after making a circle. This structural method can enable the mixture to complete a long-distance movement in a smaller space, and when the mixture moves, it performs a circular motion on the vertical section of the annular corridor, that is, the mixture as a whole performs a spiral motion, and the spiral is in an arc-shaped curved state along the annular corridor, so that the mixture can be stirred and mixed while being transported, which not only improves the heavy metal liquid phase change effect, but also reduces the space occupied by the equipment, and can also realize the continuous feeding and leaching working mode. The leached mixture is discharged into the short barrel 301 through the guide pipe 308.

[0099] like Figure 10 to Figure 11 As shown, the stirring structure includes:

[0100] A core column 205, the core column 205 is vertical, and the core column 205 rotates vertically and is inserted in the middle of the leaching box 201, one end of the core column 205 is connected to the rotating drum 304, and the other end of the core column 205 is provided with a motor 208, and the motor 208 is fixed on the leaching box 201, and the partition 204 is in sliding contact with the core column 205;

[0101] The outer cylinder 206 is located in the leaching box 201. The end surface of the partition plate 204 facing the core column 205 is provided with a notch, and the outer cylinder 206 passes through the notch;

[0102] A plurality of push plates 207 are located between the core column 205 and the outer cylinder 206. The push plates 207 are used to connect the core column 205 and the outer cylinder 206. The push plates 207 are inclined.

[0103] When the motor 208 drives the core column 205 to rotate, the core column 205 will drive the outer cylinder 206, the push plate 207 and the rotating cylinder 304 to rotate synchronously. The outer cylinder 206 and the push plate 207 pass through the notch on the partition 204 to perform a circular motion. Since the push plate 207 is inclined, the push plate 207 will push the mixture between two adjacent push plates 207 in the outer cylinder 206 upward or downward. The pushed mixture will move in an arc along the inner wall of the annular corridor, that is, the mixture moves from the upper side of the annular corridor to the lower side, or from the lower side to the On the upper side, the mixture enters between two adjacent push plates 207 again, thereby realizing the vertical circular motion of the mixture in the annular corridor. Since the mixture pushed by the push plate 207 also shows an inclined motion, combined with the rotation of the outer cylinder 206, the mixture moves along the direction of the annular corridor, and the mixture moves from one side of the partition 204 to the other side of the partition 204, thereby realizing the diverse movement modes of the mixture in the leaching box 201, realizing both the conveying function of the mixture and the stirring and mixing function of the mixture.

[0104] To prevent the space channel between two adjacent push plates 207 from being connected to the front and rear sides of the partition 204 when the space channel is at the notch position of the partition 204, as shown in FIG. Fig.11 As shown, the thickness of the partition 204 is larger than the width of the space between two adjacent push plates 207 in a direction perpendicular to the partition 204. In this way, even if one end of the space between two adjacent push plates 207 is located on one side of the partition 204, the other end of the space will be located on the inner side of the notch, thereby limiting the mixture to move only along the circular corridor trajectory.

[0105] In the process of the mixture moving along the circular corridor, in order to improve the mixing effect, such as Fig.11 As shown, a plurality of stirring rods 209 are arranged on the inner wall of the leaching box 201, so that when the mixture passes through the position of the stirring rod 209, the stirring rod 209 will divert and stir the mixture, and at the same time, the stirring rod 209 can move part of the mixture toward the middle position of the vertical section of the corridor, so as to facilitate the flushing of the mixture located at the midpoint of the line between the outer wall of the outer cylinder 206 and the inner wall of the leaching box 201, thereby achieving comprehensive stirring of the mixture and improving the mixing effect.

[0106] like Fig.12 As shown, a regulating valve 210 is provided on the liquid supply pipe 203, a gear 211 is provided at the valve stem end of the regulating valve 210, the gear 211 and the regulating valve 210 are connected via a spring 212, and a rack 213 is meshedly provided on the gear 211;

[0107] A sealing plate 214 is provided in the feed pipe 202 to rotate downwardly, a connecting rod 215 is provided on the bottom surface of the sealing plate 214 to rotate upwardly, a movable rod 216 is provided at the end of the connecting rod 215 away from the sealing plate 214 to rotate horizontally, and the end of the movable rod 216 slides transversely through the feed pipe 202 and is fixedly connected to the rack 213;

[0108] The structure is mainly used to automatically adjust the amount of leachate according to the sludge supply. In the initial state, due to the elastic effect of the spring 212, the sealing plate 214 closes the feed pipe 202. When the sludge is supplied downward in the feed pipe 202, the sludge pushes the sealing plate 214 to rotate downward and open. At this time, the sealing plate 214 pushes the rack 213 to move through the connecting rod 215 and the movable rod 216. The rack 213 drives the gear 211 to rotate and open the regulating valve 210. The spring 212 is elastically deformed. At this time, the leachate It will be supplied into the feed pipe 202 through the liquid supply pipe 203. As the sludge supply speed changes, the thrust on the sealing plate 214 will change. At this time, the inclination angle of the sealing plate 214 changes, thereby changing the opening amount of the regulating valve 210, so as to facilitate the control of the speed and supply amount of the leachate supplied by the liquid supply pipe 203, thereby realizing automatic proportioning of the leachate supply and the sludge supply, avoiding waste of resources when the leachate is supplied too much, or failing to carry out comprehensive and effective leaching treatment of heavy metals when the leachate is supplied too little.

[0109] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A sludge heavy metal resource recovery device, characterized in that: It includes a leaching and separation unit composed of a leaching structure and a separation structure; The leaching structure is used to mix the filtered sludge and the leaching liquid; The separation structure is used to perform filter press treatment on the sludge that has undergone leaching treatment; Wherein, the separation structure comprises: A short barrel is used to store sludge, the axis of the short barrel is vertical, a discharge pipe for discharging materials and a drainage structure for draining water are arranged at the bottom of the short barrel, and a guide pipe connected to the leaching structure is arranged at the top of the short barrel; A filter ring is located in the short barrel, the filter ring divides the internal space of the short barrel into an inner water storage chamber and an outer storage chamber, the axis of the filter ring is parallel to the axis of the short barrel and deviates from each other, the top of the filter ring extends out of the short barrel, and the filter ring rotates on the short barrel; A top plate is located inside the filter ring, and the top plate is coplanar with the upper surface of the short barrel; A rotating drum is coaxial with the short barrel, the rotating drum passes through the short barrel and the top plate, and the rotating drum and the filter ring define the position of the top plate; A plurality of baffles are distributed in a ring shape on the inner side of the short barrel, and one end of the baffle is connected to the outer wall of the drum, and the other end of the baffle is in contact with the inner wall of the short barrel. The baffle slides through the filter ring, and the baffle separates the water storage chamber and the storage chamber where it is located; The first rotating column allows the receiving slot plate and the rotating drum to rotate relative to each other, the second rotating column allows the plug plate and the filter ring to rotate relative to each other, and the spring sheet allows the receiving slot plate and the plug plate to slide relative to each other, thereby allowing the baffle to telescopically move; A lever is slidably inserted into the rotating drum outside the short barrel, the lever moves along the radial direction of the rotating drum, and the end of the lever is rotatably connected to the filter ring; The baffle comprises: A first rotating column, rotatably mounted on the outer wall of the rotating drum; A receiving slot plate is fixed on the outer wall of the first rotating column; An insert plate is coplanar with the receiving slot plate, one end of the insert plate is slidably inserted into the receiving slot plate and connected to each other through a spring sheet; The second rotating column is rotatably embedded in the filter ring, the axis of the second rotating column is parallel to the axis of the filter ring, and the other end of the insert plate slides through the second rotating column and is in sliding contact with the inner wall of the short barrel.

2. A sludge heavy metal resource recovery device according to claim 1, characterized in that: A plurality of air holes are provided on the inner wall of the rotating drum, and the air holes are connected with the receiving slot plate through the first rotating column.

3. A sludge heavy metal resource recovery device according to claim 2, characterized in that: A plurality of material openings are provided on the inner wall of the drum, and the material openings are connected to the storage chamber between two adjacent baffles; The drainage structure comprises: A fixed cylinder is located inside the rotating cylinder, and the air hole is located above the fixed cylinder; An opening is provided on the fixed cylinder; A fixed plate, fixedly connected between the fixed cylinder and the short barrel; Among them, the outer wall of the fixed cylinder is used to seal the material opening, and when the rotating cylinder rotates and moves the material opening to the opening position, the material opening is connected with the opening.

4. The sludge heavy metal resource recovery device according to claim 1, characterized in that: The number of the leaching and separation units is at least two groups, and they are connected in sequence. The first leaching and separation unit is used for leaching the sludge, and the other leaching and separation units are used for washing the sludge.

5. A sludge heavy metal resource recovery device according to claim 4, characterized in that: The upper surface of the short barrel on the leaching separation unit used for leaching is connected with a water supply pipe, and the water supply pipe and the discharge pipe are in the same line in the vertical direction.

6. The sludge heavy metal resource recovery device according to claim 1, characterized in that: The leaching structure comprises: A leaching tank, used for storing sludge, wherein the leaching tank is provided with a circular corridor, the axis of which is vertical; A feed pipe, installed on the top of the leaching tank and connected to the annular gallery; Partitions, installed in the circular corridor and used to divide the circular corridor; A stirring structure is installed in the annular corridor and is used to make the sludge move along the annular corridor, and the sludge performs vertical circular motion on the vertical section of the annular corridor; Among them, the material guide pipe is installed at the bottom of the leaching box, and the material guide pipe and the feed pipe are respectively located on both sides of the partition. The two adjacent groups of leaching separation units are connected through the discharge pipe and the feed pipe. The side wall of the feed pipe on the leaching separation unit used for leaching is connected with a liquid supply pipe, which is used to supply leaching liquid into the feed pipe.

7. A sludge heavy metal resource recovery device according to claim 6, characterized in that: The stirring structure comprises: A core column, the core column is vertical, and the core column rotates vertically and is inserted in the middle of the leaching box, one end of the core column is connected to the rotating drum, and the other end of the core column is provided with a motor, and the motor is fixed on the leaching box, and the partition is in sliding contact with the core column; An outer cylinder is located in the leaching box, a notch is formed on the end surface of the partition facing the core column, and the outer cylinder passes through the notch; A plurality of push plates are located between the core column and the outer cylinder, the push plates are used to connect the core column and the outer cylinder, and the push plates are inclined; The thickness of the partition is greater than the width of the space between two adjacent pusher plates along a direction perpendicular to the partition.

8. The sludge heavy metal resource recovery device according to claim 7, characterized in that: A plurality of stirring rods are arranged on the inner wall of the leaching box; The liquid supply pipe is provided with a regulating valve, the valve stem end of the regulating valve is provided with a gear, the gear and the regulating valve are connected by a spring, and the gear is meshed with a rack; A sealing plate is arranged in the feed pipe for tilting and rotating downward, a connecting rod is arranged on the bottom surface of the sealing plate for tilting and rotating, a movable rod is arranged on the end of the connecting rod away from the sealing plate for horizontal rotation, and the end of the movable rod slides transversely through the feed pipe and is fixedly connected to the rack.

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