A device for recycling valuable substances in carbon black production wastewater

Abstract

The present application relates to chemical production wastewater treatment technical field, specifically disclose a kind of valuable material resource recycling device in carbon black production wastewater, comprising: shell, shell is equipped with inner shell, connecting plate is equipped between the inner wall of shell and inner shell, connecting plate top forms wastewater flow channel, connecting plate lower part forms clean water flow channel, connecting plate is equipped with filter surface and slag guide surface, clean water flow channel and wastewater flow channel are respectively connected with water inlet pipeline and drain pipeline;Rotary cover, with the opening of wastewater flow channel rotatory sealing connection, rotary cover is vertically installed with multiple baffle, baffle and the wall surface of wastewater flow channel sealing sliding connection, shell is equipped with power component of driving rotary cover rotation;Discharge slot, with slag guide surface communication, multiple vibration plates are arranged in discharge slot, adsorption particles are filled in vibration plate, the valuable material of carbon black powder can be recycled simultaneously in the present application, effectively reduce the water content of recovery product and waste water afterheat, to reduce subsequent heat consumption.

Description

Technical Field

[0001] This application relates to the field of chemical production wastewater treatment technology, and specifically discloses a device for the resource recovery of valuable substances in carbon black production wastewater. Background Technology

[0002] Carbon black is an important industrial raw material, and its production process generates a large amount of high-temperature wastewater containing a significant amount of carbon black powder particles. If not recycled, this not only wastes resources but also severely pollutes the environment. Currently, industrial treatment of carbon black wastewater primarily focuses on recovering the carbon black powder. A common recycling process involves adding a flocculant to the wastewater to induce sedimentation, then pressing the settled slurry through a filter press to form a filter cake, and finally drying the filter cake to obtain the carbon black powder product.

[0003] However, even after pressure filtration, the resulting filter cake still contains a high moisture content. Subsequent drying processes require significant heat energy to evaporate this moisture, leading to high energy consumption and costs. Secondly, the initial temperature of carbon black production wastewater is typically between 50-80℃. Using sedimentation and pressure filtration completely wastes this valuable heat energy, resulting in substantial energy loss. While some processes attempt to incorporate heat exchangers to recover this heat, the strong adhesion of carbon black powder easily forms a severe fouling layer on the heat exchange surface, causing a sharp decline in heat exchange efficiency. This necessitates frequent cleaning and maintenance, severely impacting production continuity and economic efficiency. Furthermore, during filtration, the static filter surface is easily clogged by fine carbon black particles, requiring frequent backwashing or filter media replacement, further reducing treatment efficiency.

[0004] It is evident that current carbon black wastewater suffers from problems such as high filter cake moisture content, high drying energy consumption, and difficulty in utilizing thermal energy, making it difficult to achieve low-energy consumption, continuous, and high-efficiency resource recovery. Therefore, in view of this, the present invention provides a resource recovery device for valuable substances in carbon black production wastewater to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a recovery device that can effectively reduce the moisture content of the recovered product and recover waste heat from wastewater while recovering valuable substances from carbon black powder, thereby reducing subsequent heat energy consumption, and thus achieving low-energy, continuous and high-efficiency resource recovery of carbon black generation waste.

[0006] To achieve the above objectives, the basic solution of the present invention provides a device for the resource recovery of valuable substances from carbon black production wastewater, comprising: The shell has an inner shell inside, and a connecting plate is provided between the inner shell and the inner wall of the shell. A wastewater channel is formed above the connecting plate, and a clean water channel is formed below the connecting plate. The connecting plate is provided with a filter surface and a sludge guiding surface. The clean water channel and the wastewater channel are respectively connected to an inlet pipe and a drain pipe. The rotating cover is rotatably and sealingly connected to the opening of the wastewater channel. Multiple baffles are vertically installed on the rotating cover. The baffles are slidably and sealingly connected to the wall of the wastewater channel. The housing is equipped with a power component to drive the rotating cover to rotate. The discharge chute is connected to the slag guide surface. Multiple vibrating plates are arranged inside the discharge chute, and the vibrating plates are filled with adsorbent particles.

[0007] Furthermore, it also includes a positive and negative pressure pulse auxiliary system, including: A pneumatic chamber is provided on the inner shell and is connected to the corresponding wastewater flow channel. A piston is slidably sealed in each pneumatic chamber. The piston rod of the piston extends out of the pneumatic chamber and points to the center of the inner shell. A limiting ball is provided at the end of the piston rod. A pressure spring is provided between the limiting ball and the outer wall of the pneumatic chamber. A cam is rotatably connected within the housing, and the peripheral surface of the cam abuts against the ends of each of the limiting balls; When the cam rotates, its peripheral contour intermittently pushes the limiting ball, which in turn drives the piston to reciprocate within the pneumatic chamber via the piston rod, thereby alternately applying positive and negative pressure to the wastewater channel connected to the pneumatic chamber.

[0008] Furthermore, the output end of the power component is connected to a planetary gear transmission pair, and the sun gear in the planetary gear transmission pair is connected to the output end of the power component and is rotatably connected to the center of the upper housing; The planetary gears in the planetary gear transmission pair are rotatably connected to the upper housing and mesh with the sun gear; The ring gear in the planetary gear transmission pair is coaxially mounted on the rotating cover and meshes with the planet gears.

[0009] Furthermore, the partition is installed on the rotating cover by an elastic sealing sliding method. The top of the partition extends out of the top of the rotating cover and is provided with a limiting ear. The rotating cover is provided with an ear groove at the corresponding position. A spring plate is provided between the top of the ear groove and the limiting ear. The spring plate presses the partition down against the inner bottom surface of the wastewater flow channel. When the bottom of the baffle contacts the bottom surface of the wastewater flow channel, a gap is left between the limiting lug and the bottom surface of the lug groove.

[0010] Furthermore, multiple vibrating plates are arranged sequentially along the material flow direction of the discharge trough, and each vibrating plate is rotatably connected to the two side walls of the discharge trough via a rotating shaft. A torsion spring is provided between the rotating shaft and the discharge trough. Each of the aforementioned vibrating plates includes a metal mesh frame with an opening tilted downwards, an elastic mesh stretched at the opening of the metal mesh frame, and adsorbed particles filling the interior of the metal mesh frame; Among the vibrating plates arranged sequentially along the discharge chute, the bottom of the upper vibrating plate is located above the top of the lower vibrating plate.

[0011] Furthermore, the bottom of the discharge trough is provided with a plurality of wedges, each wedge being located below the corresponding vibrating plate. The upper surface of the wedge is adapted to the path of the vibrating plate when it rotates downwards, and the wedge is provided with a plurality of water-permeable holes. When the vibrating plate rotates to the position where it contacts the wedge, the metal mesh frame and the wedge together compress the adsorbed particles inside the metal mesh frame.

[0012] Furthermore, the ends of the rotating shafts all extend out of the discharge trough and are equipped with crank handles; The discharge chute is vertically slidably connected to a sliding frame. The sliding frame includes a horizontal plate, vertical rods at both ends of the horizontal plate, and a limiting plate at the bottom of the vertical rods. A limiting groove is opened horizontally on the limiting plate, and the end of the crank handle is slidably and rotatably fitted into the limiting groove. The cam is coaxially connected to a turntable, and the bottom surface of the turntable is provided with a plurality of protrusions for periodically pressing down each of the horizontal plates.

[0013] Furthermore, the discharge trough is also equipped with an electric heating tube or a hot air nozzle.

[0014] Furthermore, the end region of the wastewater channel near the slag guiding surface is set as a flat sealing surface, and the distance between the water inlet pipe and the slag guiding surface, and the length of the sealing surface are at least greater than the distance between the two partitions.

[0015] Based on the same inventive concept, this invention also provides a method for resource recovery of valuable substances from carbon black production wastewater, comprising using the above-mentioned recovery device to recover carbon black powder from carbon black production wastewater, the steps of which are as follows: The wastewater from carbon black production is continuously fed into the wastewater channel. The wastewater moves along the wastewater channel with the rotating cover and is filtered through the filter surface. The clean water passes through the filter surface and enters the clean water channel before being discharged. The carbon black particles are trapped on the surface of the filter surface and are scraped to the slag guide surface by the baffle plate and discharged through the slag discharge surface. The discharged carbon black particles enter the discharge trough and come into contact with the adsorbed particles as they roll on the surface of the vibrating plate. The adsorbed particles absorb the moisture in the carbon black particles. The vibrating plate rotates periodically to squeeze the adsorbed particles, causing the water in the adsorbed particles to be discharged. The carbon black particles after adsorption and dehydration are discharged from the discharge port of the discharge trough, and the water is discharged from the drain port.

[0016] The principle and effect of this solution are as follows: 1. This invention not only utilizes a rotating cover to drive a partition, allowing wastewater to dynamically contact and filter with the filter surface within the wastewater flow channel, achieving initial dehydration; but also employs a positive and negative pressure pulse mechanism formed by components such as cams and pistons to apply alternating pressure to the slurry in the treatment chamber, enhancing the permeation and removal of water; simultaneously, the removed wet carbon black powder enters a vibrating plate area containing polyvinyl alcohol gel adsorbent particles. During the rolling contact process with the carbon black powder, the adsorbent particles further physically absorb water and are periodically squeezed out by wedges for regeneration, thereby obtaining carbon black powder with significantly reduced water content, reducing the load on subsequent deep drying processes and significantly lowering total energy consumption.

[0017] 2. The present invention designs the wastewater flow channel of the entire recycling device as a ring structure surrounding the inner wall of the shell. During the treatment process, the high-temperature wastewater continuously flows through and surrounds the internal space of the device, which plays a role in heat preservation for the entire device. This effectively reduces the heat loss of carbon black powder in the treatment process, which is equivalent to indirectly recovering the waste heat of the wastewater. This allows the recycled product to carry a higher initial temperature, further saving the energy consumption for subsequent drying and solving the problems of heat energy waste and easy contamination of heat exchangers in traditional processes.

[0018] 3. While the baffle of the present invention pushes the wastewater forward along the annular flow channel, its lower end can scrape against the filter surface, which can remove the carbon black filter cake layer attached to the filter surface in real time and dynamically, and force it to be pushed to the slag discharge surface for discharge. This solves the problem of easy clogging in static filtration, ensures the efficient and continuous operation of the filtration process, eliminates the need for shutdown backflushing, and greatly improves the processing throughput and operational flexibility.

[0019] 4. This invention integrates the servo motor and planetary gear reduction transmission mechanism on the top of the housing, providing precise and stable driving force for the coordinated operation of the rotating cover and the cam, and the layout is compact; moreover, the partition adopts a spring sheet elastic pressing and up-and-down floating sealing sliding design, which can not only ensure continuous pressing with the bottom surface of the flow channel for efficient slag scraping, but also adaptively pass through particles or uneven surfaces to prevent jamming, extend the service life of the equipment, and ensure the stability and reliability of the system during long-term operation.

[0020] 5. The discharge trough of the present invention is equipped with multiple vibrating plates containing adsorbed particles. During the rolling process of the carbon black particles on the surface of the vibrating plate, they come into full contact with the adsorbed particles and the moisture is absorbed. The vibrating plate vibrates continuously under the action of the sliding frame driven by the cam, and cooperates with the wedge to squeeze the adsorbed particles, discharge the water inside them, restore the water absorption capacity of the adsorbed particles, and achieve long-term stable operation.

[0021] 6. This invention integrates functions such as filtration, positive and negative pressure assisted dehydration, adsorption dehydration, drying, and thermal insulation into one compact structure with a small footprint, making it suitable for the resource-based treatment of wastewater from carbon black production enterprises. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This illustration shows a schematic diagram of a device for resource recovery of valuable substances in carbon black production wastewater according to an embodiment of this application; Figure 2 This paper shows a top view of the lower shell of a device for resource recovery of valuable substances in carbon black production wastewater according to an embodiment of this application. Figure 3 This illustration shows a bottom view of the rotating cover in a device for the resource recovery of valuable substances in carbon black production wastewater according to an embodiment of this application. Figure 4 This illustration shows a schematic diagram of the cooperation between the rotating cover and the partition in a resource recovery device for valuable substances in carbon black production wastewater according to an embodiment of this application. Figure 5 This illustration shows a schematic diagram of the discharge trough structure in a carbon black production wastewater resource recovery device according to an embodiment of this application; Figure 6 It shows Figure 5 Method diagram for part A; Figure 7 This paper shows a cross-sectional view of the internal structure of the discharge trough in a carbon black production wastewater resource recovery device according to an embodiment of this application. Figure 8 The diagram shows the installation of a vibrating plate in a device for the resource recovery of valuable substances in carbon black production wastewater according to an embodiment of this application. Detailed Implementation

[0024] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0025] The reference numerals in the accompanying drawings include: lower housing 1, upper housing 2, servo motor 3, inner housing 4, rotating cover 5, partition 6, gear ring 7, ear groove 8, cam 9, piston rod 10, limiting ball 11, pressure spring 12, air pressure chamber 13, mounting ring 14, connecting column 15, filter surface 16, slag guiding surface 17, sealing surface 18, water inlet pipe 19, piston plate 20, limiting ear 21, spring plate 22, turntable 23, discharge chute 24, discharge port 25, drain port 26, horizontal plate 27, telescopic rod 28, vertical rod 29, limiting plate 30, crank handle 31, sleeve 32, clear water channel 33, drain pipe 34, adsorbent particles 35, metal mesh frame 36, wedge block 37.

[0026] A device for the resource recovery of valuable substances in carbon black production wastewater, implementing, for example... Figure 1 As shown: The enclosure includes an upper shell 2 and a lower shell 1, which are fixedly connected by a flange. An inner shell 4 is concentrically arranged inside the lower shell 1. The outer wall of the inner shell 4 is connected and fixed to the inner wall of the lower shell 1 by an annular connecting plate. This connecting plate divides the annular space between the lower shell 1 and the inner shell 4 into upper and lower layers. The upper layer is an annular wastewater flow channel for wastewater flow, and the lower layer is a clean water flow channel 33 for collecting and discharging clean water.

[0027] The connecting plate serves as the core working interface. One part of its area is equipped with a filter surface 16 to separate carbon black particles from water in the wastewater; the other part is set as an inclined slag guiding surface 17 without filtration function to discharge the trapped carbon black particles.

[0028] A water inlet pipe 19 is provided on one side of the lower shell 1. The water inlet pipe 19 is connected to the wastewater channel. Its opening position is at a sufficient distance from the slag guide surface 17. This distance is at least greater than the distance between the two subsequent baffles 6, so as to ensure that the wastewater entering from the water inlet pipe 19 must flow through a sufficiently long filtration path before reaching the slag discharge area, avoiding short-flow of wastewater directly impacting the slag guide surface 17. The bottom of the clean water channel 33 is connected to multiple branch pipes, which eventually converge into a drain pipe 34, thereby discharging the clean water that has permeated through the filter surface 16.

[0029] To achieve dynamic flow filtration of wastewater within the flow channel, a rotating cover 5 is installed at the upper opening of the wastewater flow channel. The rotating cover 5 is an annular component, with its inner wall edge rotatingly and sealingly engaging with the top of the inner shell 4 and the top of the lower shell 1, respectively, and achieving airtightness through the filling sealing rings. In the assembled state, the upper shell 2 and the lower shell 1 are connected and aligned, completely covering and constraining the rotating cover 5 inside the shell. A servo motor 3, serving as a power source, is installed on the top of the upper shell 2, and a transmission component for transmitting power and reducing speed and increasing torque is installed inside the upper shell 2.

[0030] In this embodiment, the transmission component adopts a planetary gear transmission pair. The sun gear is rotatably connected to the center of the upper housing 2 and is directly connected to the output shaft of the servo motor 3 via a coupling or coaxially connected via a reducer. Multiple planetary gears are evenly distributed around the sun gear and mesh with it. Each planetary gear is mounted on the upper housing 2 via bearings and bearing seats, allowing it to rotate only in a fixed position. A gear ring 7 is fixedly installed on the rotating cover 5. The gear ring 7 is coaxially arranged with the rotating cover 5 and meshes with each planetary gear. When the servo motor 3 drives the sun gear to rotate, the power is smoothly and with high torque transmitted to the gear ring 7 through the transmission of the planetary gears, thereby driving the entire rotating cover 5 to rotate slowly and stably relative to the lower housing 1 and the inner housing 4.

[0031] Multiple partitions 6 are vertically and slidably installed on the rotating cover 5 along its circumference and in a sealed manner. The partitions 6 extend downward and their bottom edges are in sealed sliding contact with the bottom surface of the wastewater channel, that is, the partitions 6 are in sealed sliding contact with the upper surface of the connecting plate. This dynamically divides the annular wastewater channel into multiple independent treatment chambers. In this embodiment, the installation method between the partitions 6 and the rotating cover 5 is as follows: the top of each partition 6 extends out of the top of the rotating cover 5, and limiting lugs 21 are provided on the symmetrical sides of the extended portion. The rotating cover 5 is correspondingly provided with a groove 8 that accommodates the limiting lugs 21 and allows them to move freely vertically. A spring plate 22 that is always in a compressed state is provided between the top of the groove 8 and the limiting lug 21. The spring plate 22 pushes the limiting lug 21 downward, thereby elastically pressing the partition 6 downward as a whole, so that its bottom edge is always in close contact with the upper surface of the connecting plate. Furthermore, when the bottom of the partition 6 contacts the connecting plate, a vertical gap is still maintained between the limiting ear piece 21 and the bottom surface of the ear groove 8. This gap allows the partition 6 to be pushed upwards to adapt to pass through when it encounters hard particles or slight unevenness, effectively preventing movement jamming.

[0032] During operation, the servo motor 3 drives the rotating cover 5 to rotate continuously around the housing axis via a planetary gear transmission pair. The rotation of the rotating cover 5 drives all the partitions 6 to rotate synchronously, causing each treatment chamber separated by the partitions 6 to move forward sequentially along the annular wastewater flow channel. At any given time, wastewater flowing in from the inlet pipe 19 enters an empty treatment chamber that rotates past the inlet. Subsequently, this treatment chamber is sealed by the subsequent partitions 6 and begins to move along the flow channel. During this movement, the wastewater is in long-term, dynamic contact with the filter surface 16 on the connecting plate. Under the action of its own gravity and subsequent pressure pulses, the water permeates through the micropores of the filter surface 16 into the clear water flow channel 33 below, while the carbon black powder is trapped in the treatment chamber. At the same time, the bottom edge of the moving partitions 6 continuously scrapes off the initially formed filter cake layer on the filter surface 16 and pushes it forward along with the wastewater, thereby constantly exposing fresh filter surfaces 16 and ensuring a continuous and efficient filtration rate. When the processing chamber moves above the slag guide surface 17, the slurry or semi-dry material containing high concentration of carbon black powder is completely scraped to the slag guide surface 17 by the partition plate 6 and discharged from the wastewater channel from there.

[0033] To further improve the solid-liquid separation efficiency, this embodiment also includes a positive and negative pressure pulse auxiliary system. Multiple slots communicating with wastewater channels are circumferentially formed on the inner shell 4 wall near the slag guide surface 17. A sealed pressure chamber 13 is provided on the inner wall of the inner shell 4 corresponding to each slot. A piston is slidably and sealed within each pressure chamber 13. The piston rod 10 extends outward from the pressure chamber 13, pointing towards the center of the inner shell 4. A limiting ball 11 is installed at the end of the piston rod 10. A pressure spring 12 is sleeved on the piston rod 10 between the limiting ball 11 and the outer wall of the pressure chamber 13. The thrust of the pressure spring 12 causes the piston to tend to exit the pressure chamber 13.

[0034] In the planetary gear transmission pair, the sun gear is coaxially connected to a cam 9 via a coupling. An mounting ring 14 is fixedly installed inside the inner housing 4 via multiple connecting pillars 15 to support the rotation of the cam 9 and ensure its stable operation. The cam 9 is positioned at the same horizontal height as the limiting balls 11. Under the action of their respective pressure springs 12, the ends of the limiting balls 11 are always in close contact with the peripheral surface of the cam 9. The cam 9 rotates synchronously with the sun gear, and the undulating contour of its periphery intermittently pushes the limiting balls 11 outward. When the limiting balls 11 are pushed outward, the piston rod 10 drives the piston to compress air in the pneumatic chamber 13, creating instantaneous high pressure when the corresponding processing chamber passes above the slot, forcibly promoting moisture penetration. When the concave portion of the cam 9's contour passes through, the pressure spring 12 pushes the piston back to its original position, creating instantaneous negative pressure in the corresponding processing chamber, generating a certain vacuum suction effect, which helps to loosen the compacted carbon black filter cake layer attached to the filter surface 16. By alternating high-frequency positive and negative pressure pulses applied to the processing chamber that is about to reach the slag discharge section, it can effectively prevent carbon black powder from deeply clogging the filter surface 16, and greatly enhance the penetration effect, thereby minimizing the moisture content of the material.

[0035] The discharged water-containing carbon black powder enters the hopper inside the lower shell 1 at the slag guide surface 17. The hopper receives the discharged material and guides it into the inclined discharge trough 24. The bottom of the discharge trough 24 is equipped with a discharge port 25. Multiple vibrating plates are arranged in sequence along the material sliding direction inside the discharge trough 24.

[0036] Each vibrating plate includes a downward-sloping metal mesh frame 36 with an elastic mesh stretched at the opening. The inside of the metal mesh frame 36 is filled with adsorbent particles 35. The adsorbent particles 35 are made of polyvinyl alcohol gel material with extremely strong water absorption properties, which have stronger water absorption properties than carbon black particles.

[0037] The vibrating plate is rotatably connected to the side wall of the discharge trough 24 via a rotating shaft. The end of the rotating shaft extends out of the discharge trough 24. Both side walls of the discharge trough 24 are provided with sleeves 32 that cooperate with the rotating shaft. The rotating shaft and the sleeves 32 are rotatably connected. A torsion spring is provided between the rotating shaft and the inner wall of the sleeves 32 to keep the vibrating plate in its initial tilt position without external force. A rocker arm 31 is connected to the vibrating plate. The top of the discharge trough 24 is vertically slidably connected to a sliding frame. The sliding frame includes a horizontal plate 27, vertical rods 29 at both ends of the horizontal plate 27, and a limiting plate 30 at the bottom of the vertical rods 29. The limiting plate 30 is provided with a limiting groove in the horizontal direction. The end of the rocker arm 31 is slidably and rotatably connected in the limiting groove. The horizontal plate 27 and the discharge trough 24 are connected by a telescopic rod 28.

[0038] Among the vibrating plates arranged sequentially along the discharge chute 24, the bottom of the upper vibrating plate is located above the top of the lower vibrating plate, so that the carbon black particles can naturally roll from the upper vibrating plate to the surface of the lower vibrating plate, preventing the particles from falling directly into the bottom surface of the discharge chute 24.

[0039] The limiting groove at the lower end of the sliding frame and the end of the rocker handle 31 form a sliding and rotating connection, so that the movement of the sliding frame drives the rocker handle 31 to rotate, thereby driving the vibrating plate to oscillate back and forth. The power to drive the vibration of the vibrating plate comes from the cam 9. Specifically, the bottom of the cam 9 is coaxially connected to a connecting shaft, and the bottom end of the connecting shaft passes through a mounting ring 14 and is fixed to a turntable 23. The bottom surface of the turntable 23 has multiple protrusions. When the turntable 23 rotates, the protrusions at its bottom periodically press down on the horizontal plate 27 of the sliding frame. Then, through the linkage mechanism composed of the vertical rod 29, the limiting plate 30 and the rocker handle 31, the vertical motion is converted into the reciprocating torsional motion of the rotating shaft, thereby causing the vibrating plate to vibrate at high frequency. After the water-containing carbon black powder falls from the hopper, it rolls and jumps along the surface of each vibrating plate in sequence, relying on its own gravity and the shaking of the vibrating plate. During this process, the powder particles come into full contact with the polyvinyl alcohol gel adsorbent particles 35, and their moisture is efficiently physically adsorbed, thereby significantly reducing the final moisture content of the carbon black powder.

[0040] To maintain the water absorption activity of the adsorbent particles 35, wedges 37 are installed at the bottom of the discharge trough 24 at positions corresponding to the rotation paths of each vibrating plate. The upper surface of the wedge 37 is shaped to match the downward rotation path of the vibrating plate, and multiple water-permeable holes are arranged on the wedge 37. When the vibrating plate rotates to its limit position, the metal mesh frame 36 and the upper surface of the wedge 37 are squeezed, squeezing out some of the water stored in the adsorbent particles 35 within the mesh frame during the water absorption process. The squeezed water is discharged through the water-permeable holes on the wedge 37 and the drain outlet 26 at the bottom of the discharge trough 24. The regenerated adsorbent particles 35 are reset with the vibrating plate under the action of the torsion spring, restoring their fluffy state and preparing to receive the next batch of material. This cycle continues, maintaining a high-efficiency adsorption capacity.

[0041] Electric heating tubes or hot air nozzles are also installed in the discharge trough 24 to heat and dry the carbon black particles rolling on the vibrating plate, further reducing their moisture content. To reduce the impact of heat on the filtration process, the ends of the wastewater channel near the slag discharge surface are all provided with flat sealing surfaces 18, and the distance between the sealing surfaces 18 is at least greater than the distance between adjacent partitions 6. This can effectively prevent the hot air generated by the hot air nozzles or heating in the discharge trough 24 from entering the wastewater channel and the clean water channel 33 through the micropores of the filter surface 16 in the opposite direction, ensuring the independent operation of the internal zones of the system.

[0042] The entire annular wastewater flow channel is arranged along the inner wall of the shell. During the flow of wastewater, it plays a role in heat preservation inside the shell, effectively reducing heat loss and making full use of the wastewater's residual heat.

[0043] The bottom of the lower shell 1 is sealed by a base plate, and the entire shell is fixed by support feet. At the same time, the high-temperature wastewater channel surrounding the shell continuously keeps the entire device warm. Combined with the dynamic and rapid filtration and adsorption process, the heat loss of carbon black powder during the processing is minimized, so that the discharged material still maintains a high initial temperature, which greatly reduces the energy consumption for heating in the subsequent final drying process.

[0044] This embodiment systematically completes the entire process of treating carbon black production wastewater, including continuous filtration, self-cleaning slag discharge, positive and negative pressure pulse deep dehydration, physical water absorption by adsorbent, and pre-drying. It achieves efficient recovery of carbon black powder and water resources from the wastewater and achieves significant energy saving and consumption reduction.

[0045] Based on the same inventive concept, another embodiment provides a method for resource recovery of valuable substances from carbon black production wastewater, including using the recovery device described above to recover valuable substances from carbon black production wastewater. The specific steps are as follows: Step S1: Start the servo motor 3, which drives the rotating cover 5 to rotate continuously at a set speed through the planetary gear transmission pair. Multiple partitions 6 that are vertically elastically slidably installed on the rotating cover 5 rotate together with the rotating cover 5, and divide the annular wastewater flow channel into multiple independent treatment chambers arranged in sequence.

[0046] Step S2: Carbon black production wastewater at a temperature of 50°C to 80°C is continuously fed into the wastewater channel through the inlet pipe 19. A set distance is maintained between the outlet of the inlet pipe 19 and the guide surface 17 on the connecting plate to ensure that the wastewater first enters the treatment chamber enclosed by the partition 6 and falls into the area where the filter surface 16 is located, preventing the wastewater from flowing directly into the guide surface 17 and bypassing the filtration area.

[0047] Step S3: As the rotating cover 5 rotates, the wastewater in each treatment chamber moves gradually along the wastewater flow channel; the wastewater comes into contact with the filter surface 16 on the connecting plate, and under the assistance of gravity, water pressure and subsequent positive and negative pressure, the clean water passes through the filter surface 16 into the clean water flow channel 33 below, and is then discharged through the branch pipe and drainage pipe 34; the carbon black particles are trapped on the surface of the filter surface 16; at the same time, the bottom edge of the partition 6 is in close contact with the filter surface 16 and continuously scrapes up and pushes the carbon black particles attached to the filter surface 16 forward to avoid particle accumulation.

[0048] Step S4: The sun gear drives the cam 9 to rotate synchronously. The protrusions and recesses of the cam 9 alternately press the limiting balls 11 that are connected to each air pressure chamber 13, causing the piston in the air pressure chamber 13 to move back and forth. When the piston moves inward, a negative pressure is formed in the processing chamber corresponding to the air pressure chamber 13, which draws the carbon black particles blocked in the pores of the filter surface 16 away from the filter surface 16. When the piston moves outward, a positive pressure is formed in the processing chamber, which pushes the wastewater through the filter surface 16 quickly. Through continuous rotation, each processing chamber alternately experiences positive and negative pressure environments during the movement, thereby achieving filtration enhancement and self-cleaning of the filter surface 16.

[0049] Step S5: The carbon black particles pushed by the partition plate 6 to the end of the slag guide surface 17 enter the slag discharge surface, are discharged from the wastewater channel and fall into the hopper, and then enter the discharge trough 24 through the hopper and fall onto the surface of the uppermost vibrating plate.

[0050] Step S6: Under the continuous vibration of the vibrating plate, the water-containing carbon black particles roll down the surface of each vibrating plate in sequence. The metal mesh frame 36 of each vibrating plate is filled with polyvinyl alcohol gel adsorbent particles 35. During the rolling process, the carbon black particles come into full contact with the adsorbent particles 35. The adsorbent particles 35 selectively absorb the moisture in the carbon black particles, significantly reducing the moisture content of the carbon black particles.

[0051] Step S7: The turntable 23 rotates synchronously with the cam 9. The protrusions at the bottom of the turntable 23 sequentially press down on the horizontal plates 27 of each sliding frame. The crank handle 31 drives the rotating shaft to rotate, causing the vibrating plate to rotate downwards. When the vibrating plate rotates to its lowest position, the adsorbed particles 35 in its metal mesh frame 36 come into contact with and are squeezed against the surface of the wedge block 37 at the bottom of the discharge trough 24. The water absorbed by the adsorbed particles 35 is squeezed out and discharged through the water-permeable holes on the wedge block 37 to the bottom of the discharge trough 24, and then discharged through the drain outlet 26. After the protrusions leave, the vibrating plate returns to its original position under the action of the torsion spring. This process is repeated to achieve online compression and regeneration of the adsorbed particles 35, maintaining their continuous water absorption capacity.

[0052] Step S8: Heat is provided in the discharge trough 24 by electric heating tubes or hot air nozzles to heat and dry the carbon black particles rolling on the vibrating plate, further reducing their moisture content. The end of the wastewater flow channel near the slag discharge surface is set as a sealing surface 18 to prevent hot air from entering the filtration area and affecting the filtration process.

[0053] Step S9: The filtered water is continuously discharged from the drain pipe 34 at the bottom of the water flow channel 33; the water squeezed out of the adsorbent particles 35 and the water vapor condensate generated by hot air drying are discharged from the drain port 26 at the bottom of the discharge tank 24; the carbon black powder after adsorption dehydration and auxiliary heating drying is discharged from the discharge port 25 at the bottom of the discharge tank 24, and can be used directly or requires very little subsequent drying treatment after collection.

[0054] The steps S1 to S9 described above are carried out synchronously and continuously during the operation of the recycling device, realizing continuous feeding, continuous filtration, continuous slag discharge, continuous adsorption and dehydration, and continuous discharge of carbon black production wastewater, thereby achieving efficient resource recovery of valuable carbon black.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A device for the resource recovery of valuable substances in carbon black production wastewater, characterized in that, include: The shell has an inner shell inside, and a connecting plate is provided between the inner shell and the inner wall of the shell. A wastewater channel is formed above the connecting plate, and a clean water channel is formed below the connecting plate. The connecting plate is provided with a filter surface and a sludge guiding surface. The clean water channel and the wastewater channel are respectively connected to an inlet pipe and a drain pipe. The rotating cover is rotatably and sealingly connected to the opening of the wastewater channel. Multiple baffles are vertically installed on the rotating cover. The baffles are slidably and sealingly connected to the wall of the wastewater channel. The housing is equipped with a power component to drive the rotating cover to rotate. The discharge chute is connected to the slag guide surface. Multiple vibrating plates are arranged inside the discharge chute, and the vibrating plates are filled with adsorbent particles.

2. The device for resource recovery of valuable substances in carbon black production wastewater according to claim 1, characterized in that, It also includes a positive and negative pressure pulse auxiliary system, including: A pneumatic chamber is provided on the inner shell and is connected to the corresponding wastewater flow channel. A piston is slidably sealed in each pneumatic chamber. The piston rod of the piston extends out of the pneumatic chamber and points to the center of the inner shell. A limiting ball is provided at the end of the piston rod. A pressure spring is provided between the limiting ball and the outer wall of the pneumatic chamber. A cam is rotatably connected within the housing, and the peripheral surface of the cam abuts against the ends of each of the limiting balls; When the cam rotates, its peripheral contour intermittently pushes the limiting ball, which in turn drives the piston to reciprocate within the pneumatic chamber via the piston rod, thereby alternately applying positive and negative pressure to the wastewater channel connected to the pneumatic chamber.

3. The device for resource recovery of valuable substances in carbon black production wastewater according to claim 2, characterized in that, The output end of the power component is connected to a planetary gear transmission pair. The sun gear in the planetary gear transmission pair is connected to the output end of the power component and is rotatably connected to the center of the upper housing. The planetary gears in the planetary gear transmission pair are rotatably connected to the upper housing and mesh with the sun gear; The ring gear in the planetary gear transmission pair is coaxially mounted on the rotating cover and meshes with the planet gears.

4. The device for resource recovery of valuable substances in carbon black production wastewater according to claim 1, characterized in that, The partition is installed on the rotating cover by an elastic sealing sliding method. The top of the partition extends out of the top of the rotating cover and is provided with a limiting ear. The rotating cover is provided with an ear groove at the corresponding position. A spring plate is provided between the top of the ear groove and the limiting ear. The spring plate presses the partition down against the inner bottom surface of the wastewater flow channel. When the bottom of the baffle contacts the bottom surface of the wastewater flow channel, a gap is left between the limiting lug and the bottom surface of the lug groove.

5. A device for resource recovery of valuable substances in carbon black production wastewater according to any one of claims 1-4, characterized in that, Multiple vibrating plates are arranged sequentially along the material flow direction of the discharge trough. Each vibrating plate is rotatably connected to the two side walls of the discharge trough via a rotating shaft. A torsion spring is provided between the rotating shaft and the discharge trough. Each of the aforementioned vibrating plates includes a metal mesh frame with an opening tilted downwards, an elastic mesh stretched at the opening of the metal mesh frame, and adsorbed particles filling the interior of the metal mesh frame; Among the vibrating plates arranged sequentially along the discharge chute, the bottom of the upper vibrating plate is located above the top of the lower vibrating plate.

6. The device for resource recovery of valuable substances in carbon black production wastewater according to claim 5, characterized in that, The bottom of the discharge trough is provided with a plurality of wedges, each wedge being located below the corresponding vibrating plate. The upper surface of the wedge is adapted to the path of the vibrating plate when it rotates downwards, and the wedge is provided with a plurality of water-permeable holes. When the vibrating plate rotates to the position where it contacts the wedge, the metal mesh frame and the wedge together compress the adsorbed particles inside the metal mesh frame.

7. The device for resource recovery of valuable substances in carbon black production wastewater according to claim 5, characterized in that, The ends of the rotating shafts all extend out of the discharge trough and are equipped with crank handles; The discharge chute is vertically slidably connected to a sliding frame. The sliding frame includes a horizontal plate, vertical rods at both ends of the horizontal plate, and a limiting plate at the bottom of the vertical rods. A limiting groove is opened horizontally on the limiting plate, and the end of the crank handle is slidably and rotatably fitted into the limiting groove. The cam is coaxially connected to a turntable, and the bottom surface of the turntable is provided with a plurality of protrusions for periodically pressing down each of the horizontal plates.

8. A device for resource recovery of valuable substances in carbon black production wastewater according to claim 5, characterized in that, The discharge trough is also equipped with an electric heating element or a hot air nozzle.

9. A device for resource recovery of valuable substances in carbon black production wastewater according to claim 8, characterized in that, The end region of the wastewater channel near the slag guiding surface is set as a flat sealing surface, and the distance between the water inlet pipe and the slag guiding surface and the length of the sealing surface are at least greater than the distance between the two partitions.

10. A method for resource recovery of valuable substances from carbon black production wastewater, characterized in that, The method includes using the recycling device described in any one of claims 1-9 to recover carbon black powder from carbon black production wastewater, with the following steps: The wastewater from carbon black production is continuously fed into the wastewater channel. The wastewater moves along the wastewater channel with the rotating cover and is filtered through the filter surface. The clean water passes through the filter surface and enters the clean water channel before being discharged. The carbon black particles are trapped on the surface of the filter surface and are scraped to the slag guide surface by the baffle plate and discharged through the slag discharge surface. The discharged carbon black particles enter the discharge trough and come into contact with the adsorbed particles as they roll on the surface of the vibrating plate. The adsorbed particles absorb the moisture in the carbon black particles. The vibrating plate rotates periodically to squeeze the adsorbed particles, causing the water in the adsorbed particles to be discharged. The carbon black particles after adsorption and dehydration are discharged from the discharge port of the discharge trough, and the water is discharged from the drain port.

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