High-efficiency energy-saving chemical recovery device and recovery method

Abstract

The application relates to the technical field of chemical recovery, and discloses a high-efficiency energy-saving chemical recovery device and a recovery method, which comprise a tank body, the inside of the tank body is provided with a defoaming net, the inside of the tank body is provided with a liquid inlet distribution ring, the inside of the tank body is provided with two groups of solid baffle plates, the inside of the tank body is provided with two groups of annular baffle plates, the inside of the tank body is provided with a reflux liquid distributor, and the inside of the tank body is provided with a dredging mechanism; the dredging mechanism comprises a scraper, a piston column, a fixing frame, a linkage steel brush frame, a piston cylinder, a sliding rod, a sealing ring and an extrusion ring. The piston column driven by air pressure reduces steam leakage hidden dangers, the cleaning action does not occupy the central channel of the tank body, the interference on rectification gas flow is small, the annular packing plate is matched with a heating tower kettle and the reflux liquid distributor, high-boiling-point components are condensed and refluxed in the packing area, the batch stability of distillate components is improved, and the rectification efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of chemical recycling technology, specifically to a high-efficiency and energy-saving chemical recycling device and recycling method. Background Technology

[0002] In the patent application with publication number CN223248770U, a tower body is included. A rotating shaft is rotatably connected inside the tower body. A drive motor is provided on the tower body to drive the rotating shaft to rotate. A scraper is connected to the outer wall of the rotating shaft through a propulsion assembly. The propulsion assembly pushes the scraper to move away from the rotating shaft and to contact the inner wall of the tower body. The propulsion assembly includes a fixed rod and a movable part. One end of the fixed rod is fixedly connected to the outer wall of the rotating shaft, and the other end of the fixed rod is slidably connected to the movable part. A spring is provided on the fixed rod to push the movable part to slide away from the rotating shaft. The end of the movable part away from the fixed rod is detachably fixedly connected to the scraper.

[0003] The advantages are as follows: the propulsion component pushes the scraper to move away from the rotating shaft. As the front end of the scraper gradually wears down, the propulsion component ensures that the scraper remains in constant contact with the inner wall of the column, thus maintaining close contact with the inner wall to clean away dirt and improving the cleaning effect on the inner wall of the column. While cleaning, it also has a stirring effect, improving the heat exchange efficiency and distillation speed of the distillation column. Furthermore, the propulsion component allows the scraper to be replaced only after all the scraping surfaces have worn down, thereby improving the utilization rate of the scraper, reducing operating costs, and extending the service life of the scraper.

[0004] In the prior art, including the aforementioned patents, most commonly used cleaning solutions for chemical recovery devices employ rotary seals where the shaft passes through the top of the tower. High temperatures and corrosive solvent vapors cause the seals to wear out quickly and leak easily. The shaft runs from the top to the bottom of the tower, blocking the steam in the middle and hindering its upward movement, thus reducing the cleaning effect of distillation. Furthermore, the scraped-off dirt tends to re-accumulate in the tower. In addition, considering only cleaning without regard to heat recovery, the heat energy of the steam at the top of the tower is wasted by the cooling water, resulting in high overall energy consumption. Summary of the Invention

[0005] (a) Technical problems to be solved Based on this, the purpose of this invention is to provide a high-efficiency and energy-saving chemical recycling device and method to solve the problems in existing cleaning solutions where a rotary seal is used where the shaft passes through the top of the tower. High temperature and corrosive solvent vapors cause the seal to wear out quickly and leak easily. The shaft runs from the top to the bottom of the tower, blocking the steam in the middle and affecting the upward movement of the steam, thus reducing the cleaning effect of distillation. Furthermore, the scraped dirt is easy to re-accumulate in the tower. In addition, only cleaning is considered without regard to heat recovery, and the heat energy of the steam at the top of the tower is wasted by the cooling water, resulting in high overall energy consumption.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency and energy-saving chemical recycling device and recycling method, comprising a tank, wherein a demister screen is provided inside the tank, an inlet distribution ring is provided inside the tank, two sets of solid baffles are provided inside the tank, two sets of annular baffles are provided inside the tank, and the solid baffles and annular baffles cooperate with each other, a reflux liquid distributor is provided inside the tank, and a sludge removal mechanism is provided inside the tank, wherein the sludge removal mechanism includes a scraper, a piston column, a fixing frame, a linkage steel brush frame, and a piston cylinder. The system includes a sliding rod, a sealing ring, and a squeezing ring. The scraper is located on the outer periphery of the piston column, with its outer side conforming to the inner wall of the tank. The piston column is located inside the tank. The fixing bracket is fixed inside the tank. The linkage steel brush holder is located on the outer side of the piston column. The piston cylinder is located inside the piston column. The sliding rod is located on the outer side of the piston column. The sealing ring is located on the outer side of the piston column. The squeezing ring is located at the bottom end of the linkage steel brush holder. An exhaust pipe is provided at the bottom end of the tank. An inlet pipe is connected to the outer side of the tank, with one section of the inlet pipe spirally wrapped around the outside of the exhaust pipe.

[0007] By adopting the above technical solution, the waste liquid to be treated is pumped into the device through the inlet pipe. It is worth noting that the inlet pipe adopts a specific spiral winding shape before entering the tank. It is tightly coiled around the outer wall of the high-temperature exhaust pipe leading out from the top of the tank. At this time, the cold waste liquid flows along the pipe in the inlet pipe, while the high-temperature water vapor generated in the tank is discharged outward in the exhaust pipe. The two undergo intense heat exchange through the pipe wall. The high-temperature steam in the exhaust pipe transfers heat to the cold waste liquid in the inlet pipe. This structure preheats the waste liquid from room temperature before it enters the tank, achieving preliminary recovery and utilization of the discharged waste heat, thereby avoiding the waste of heat energy caused by the direct discharge of high-temperature steam.

[0008] Furthermore, a purity sampling probe is installed inside the tank, a storage box is installed on the outside of the tank, a reflux liquid distributor is installed inside the tank, and an inlet pipe connected to the reflux liquid distributor is installed inside the tank.

[0009] By adopting the above technical solution, the preheated waste liquid is sent into the inlet distribution ring fixed at the top of the tank through the inlet pipe. The inlet distribution ring has multiple sets of leakage spray nozzles circumferentially opened at the bottom. Under pressure, the waste liquid is sprayed out from these leakage spray nozzles and evenly sprinkled onto the evaporation structure below. The waste liquid first falls onto the solid baffle plate located directly below the inlet distribution ring. The top surface of the solid baffle plate is set as a cone. When the waste liquid flow impacts the conical top plate, the waste liquid is evenly dispersed and guided to the entire upper surface of the solid baffle plate. Then it slowly flows radially to the surrounding edges. This conical top plate design effectively prevents the waste liquid from accumulating at the center point and ensures the uniformity of the liquid film spreading to cooperate with the subsequent efficient evaporation.

[0010] Furthermore, the piston rod has a groove on its outer side that mates with the sealing ring, a sliding cavity corresponding to the fixing frame is formed inside the piston rod, a cavity that mates with the exhaust pipe is formed inside the storage box, and an air pipe connected to the solid baffle and the annular baffle is provided at one end of the exhaust pipe.

[0011] By adopting the above technical solution, the waste liquid drips from the edge of the solid baffle plate onto the annular baffle plate arranged in an alternating pattern below it. The annular baffle plate adopts a unique concave design, that is, the height of its outer peripheral edge is significantly higher than the height of its central area. Therefore, when the waste liquid falls on the outer periphery of the annular baffle plate, under the action of gravity, the waste liquid is forced to flow in the opposite direction, converge towards the center, and finally drip through the flow port opened in the center to the solid baffle plate of the next layer.

[0012] Furthermore, both the solid baffle and the annular baffle are equipped with flow pipes inside, the annular baffle has a flow port in the center, the bottom of the tank is equipped with a heating tower, and the bottom of the tank is equipped with a heating part that is in close contact with the heating tower.

[0013] By adopting the above technical solution, through the alternating stacking of two sets of solid baffles and two sets of annular baffles inside the tank, the waste liquid is forced to form an S-shaped flow path "diffused from the center to the surroundings and then converged from the surroundings to the center" inside the tank. This structure greatly increases the flow path and spreading area of ​​the waste liquid within the limited tower height. This mechanism of spreading the waste liquid allows the low-boiling-point solvents in the waste liquid to obtain a larger heating area, increasing the vaporization rate by more than double, thereby processing more waste liquid per unit time and improving the overall recovery efficiency of the device.

[0014] Furthermore, a slag guide port is provided at the bottom of the tank, a vent pipe is connected to one end of the piston cylinder, a processing chamber is provided inside the tank, and a protective ring is provided at the bottom of the tank, and the protective ring matches the piston cylinder.

[0015] By adopting the above technical solution, the heating tower at the bottom of the tank continuously heats the heating section. The high-temperature steam generated by the heating section floats upward and enters the exhaust pipe. During the movement of the high-temperature steam in the exhaust pipe, after passing through the spiral section, it enters the flow pipe connected to the interior of each set of solid baffles and annular baffles. The flow pipe is evenly distributed in a coil shape inside the baffle, so that the heat of the high-temperature steam can be evenly conducted to the entire surface of the baffle. When the waste liquid spreads and flows on the baffle, the plate itself becomes a highly efficient heating surface, continuously baking the liquid film at high temperature, causing the solvent in the waste liquid to quickly vaporize and form secondary steam that moves upward. The beneficial effect is that this embedded flow pipe heating method reduces the thermal resistance loss of heat transferred from the outside to the center of the tank, and the thermal efficiency is much higher than that of traditional jacketed heating.

[0016] (III) Beneficial Effects Compared with the prior art, the technical solution of the present invention has the following advantages: (1) The present invention uses a reciprocating self-cleaning mechanism consisting of a pneumatically driven piston rod, a fixed frame, a scraper and a linked steel brush frame. The driving component is placed on the outside of the tank. The scraper scrapes along the tank wall under air pressure, and the linked steel brush frame performs secondary cleaning. This structure does not require a rotating sealing port on the top of the tank, reducing the risk of steam leakage. The cleaning action does not occupy the central channel of the tank and has less interference with the distillation gas flow. It helps to maintain the cleanliness of the tank wall during equipment operation and extends the single continuous operation cycle.

[0017] (2) The present invention uses a spiral winding heat exchange section between the liquid inlet pipe and the exhaust pipe, as well as a flow pipe with a coiled distribution inside the solid baffle and the annular baffle. Before being discharged, the high-temperature steam preheats the room-temperature waste liquid in the liquid inlet pipe, and then enters the flow pipe to uniformly heat the surface of the baffle plate. This step-by-step heat energy utilization method enables the waste liquid to obtain an effective temperature rise during the spreading and flow stage, and the vaporization rate of the low-boiling-point solvent is accelerated accordingly, thus reducing the dependence on external fresh heat sources.

[0018] (3) The present invention uses an annular packing plate, a heating tower bottom and a reflux liquid distributor to allow the high-boiling-point components entrained in the steam to be refluxed by the external water source in the annular packing plate area, while the pure components continue to rise into the extraction pipeline. This design helps to enhance the batch stability of the distillate components and increase the distillation efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention from a first perspective; Figure 3 For the present invention Figure 2 Enlarged view of point A; Figure 4This is a schematic diagram of the internal structure of the present invention from a first perspective; Figure 5 For the present invention Figure 4 Enlarged view of point B; Figure 6 This is a partial structural schematic diagram of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of point C; Figure 8 For the present invention Figure 6 Enlarged view of point D; Figure 9 This is a partial structural diagram of the present invention; Figure 10 This is a schematic diagram showing the location of the dredging mechanism of the present invention.

[0020] In the diagram: 1. Tank; 2. Heating tower kettle; 3. Storage box; 4. Liquid inlet pipe; 5. Exhaust pipe; 6. Sludge removal mechanism; 601. Scraper; 602. Piston column; 603. Fixing frame; 604. Linkage steel brush holder; 605. Piston cylinder; 606. Sliding rod; 607. Sealing ring; 608. Squeezing ring; 609. Spring; 7. Heating section; 8. Protective ring; 9. Defoaming screen; 10. Liquid inlet distribution ring; 11. Solid baffle plate; 12. Annular baffle plate; 13. Processing chamber; 14. Purity sampling probe; 15. Reflux liquid distributor; 16. Vent pipe; 17. Slag guide port; 18. Flow pipe; 19. Flow port; 20. Water inlet pipe; 21. Annular packing plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0022] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "comprising" or "including," and similar terms used in this disclosure, mean that an element or object preceding the term encompasses the elements or objects listed following the term and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0023] like Figures 1 to 10 As shown, the present invention provides a high-efficiency and energy-saving chemical recycling device and method, including a tank 1, a demister 9, an inlet distribution ring 10, two sets of solid baffles 11, two sets of annular baffles 12, the solid baffles 11 and the annular baffles 12 cooperating with each other, a reflux liquid distributor 15, and a sludge removal mechanism 6, which includes a scraper 601 and a piston. The piston column 602, fixing bracket 603, linkage steel brush holder 604, piston cylinder 605, sliding rod 606, sealing ring 607, and compression ring 608 are all present. A scraper 601 is disposed on the outer periphery of the piston column 602, with its outer side conforming to the inner wall of the tank body 1. The piston column 602 is disposed inside the tank body 1. The fixing bracket 603 is fixed inside the tank body 1. The linkage steel brush holder 604 is disposed on the outer side of the piston column 602. The piston cylinder 605 is disposed inside the piston column 602. The sliding rod 606 is disposed on the piston column 602. On the outside, a sealing ring 607 is located on the outside of the piston rod 602, and a compression ring 608 is located at the bottom of the linkage steel brush holder 604. An exhaust pipe 5 is located at the bottom of the tank body 1, and an inlet pipe 4 connects to the outside of the tank body 1. One section of the inlet pipe 4 spirals around the outside of the exhaust pipe 5. The preheated waste liquid is fed through the inlet pipe 4 into an inlet distribution ring 10 fixed at the top of the tank body 1. The inlet distribution ring 10 has multiple sets of leakage spray nozzles circumferentially opened at its lower part. Under pressure, the waste liquid flows out from these leakage spray nozzles. The waste liquid is sprayed out and evenly sprayed onto the evaporation structure below. It first falls onto the solid baffle plate 11 located directly below the liquid inlet distribution ring 10. The top surface of the solid baffle plate 11 is set as a cone. When the waste liquid flows into the conical top plate, the waste liquid is evenly broken up and guided to the entire upper surface of the solid baffle plate 11. Then it slowly flows radially to the surrounding edges. This conical top plate design effectively prevents the waste liquid from accumulating at the center point and ensures the uniformity of the liquid film spreading to cooperate with the subsequent efficient evaporation.

[0024] For example, a purity sampling probe 14 is installed inside the tank 1, a storage box 3 is installed on the outside of the tank 1, a reflux liquid distributor 15 is installed inside the tank 1, and a water inlet pipe 20 connected to the reflux liquid distributor 15 is installed inside the tank 1. The waste liquid drips from the edge of the solid baffle 11 onto the annular baffle 12 arranged below it. The annular baffle 12 adopts a unique concave design, that is, the height of its outer peripheral edge is significantly higher than the height of its central area. Therefore, when the waste liquid falls on the outer periphery of the annular baffle 12, under the action of gravity, the waste liquid is forced to flow in the opposite direction, converge towards the center, and finally drip through the flow port 19 opened in the center to the solid baffle 11 of the next layer. For example, the piston column 602 has a groove on the outside that cooperates with the sealing ring 607, and the piston column 602 has a sliding cavity corresponding to the fixing frame 603. The storage box 3 has a cavity that cooperates with the exhaust pipe 5. One end of the exhaust pipe 5 is provided with a gas pipe that connects to the solid baffle 11 and the annular baffle 12. Through the alternating stacking of the two sets of solid baffles 11 and the two sets of annular baffles 12 inside the tank 1, the waste liquid is forced to form an S-shaped flow path in the tank that "diffuses from the center to the surroundings and then converges from the surroundings to the center". This structure greatly increases the flow path and spreading area of ​​the waste liquid within the limited tower height. This mechanism of spreading the waste liquid allows the low boiling point solvent in the waste liquid to obtain a larger heating area and the vaporization rate to increase by more than 3 times, thereby processing more waste liquid per unit time and improving the overall recovery efficiency of the device. For example, a slag guide port 17 is provided at the bottom of the tank body 1, a vent pipe 16 is connected to one end of the piston cylinder 605, a processing chamber 13 is provided inside the tank body 1, and a protective ring 8 is provided at the bottom of the tank body 1, and the protective ring 8 matches the piston cylinder 605. The heating tower 2 at the bottom of the tank body 1 continuously heats the heating section 7. The high-temperature steam generated by the heating section 7 floats upward and enters the exhaust pipe 5. During the movement of the high-temperature steam in the exhaust pipe 5, after passing through the spiral section, it will subsequently enter the solid baffles 11 and the annular baffles 1. In the internally connected flow pipe 18, the flow pipe 18 is evenly distributed in a coil shape inside the baffle plate, so that the heat of the high-temperature steam can be evenly conducted to the entire surface of the baffle plate. When the waste liquid spreads and flows on the baffle plate, the plate itself becomes a highly efficient heating surface, continuously baking the liquid film at high temperature, causing the solvent in the waste liquid to quickly vaporize and form secondary steam that moves upward. The beneficial effect is that this embedded flow pipe heating method reduces the thermal resistance loss of heat transferred from the outside to the center of the tank, and the thermal efficiency is much higher than that of traditional jacketed heating.

[0025] The working principle and usage process of this invention: The operator starts the external water pump, and the waste liquid to be treated is pumped into the device through the inlet pipe 4. It is worth noting that before entering the tank 1, the inlet pipe 4 adopts a specific spiral winding shape, which is tightly coiled around the outer wall of the high-temperature exhaust pipe 5 led out from the top of the tank. At this time, the cold waste liquid flows along the pipe in the inlet pipe 4, while the high-temperature water vapor generated in the tank 1 is discharged outward in the exhaust pipe 5. Furthermore, an insulation box is set at the point where the inlet pipe 4 and the exhaust pipe 5 are wrapped, and the high temperature inside the exhaust pipe 5 is retained to the maximum extent through the internal insulation material. The two undergo intense heat exchange through the pipe wall. The high-temperature steam in the exhaust pipe 5 transfers heat to the cold waste liquid in the inlet pipe 4. This structure preheats the waste liquid from room temperature before it enters the tank, achieving the initial recovery and utilization of the discharged waste heat, thereby avoiding the waste of heat energy caused by the direct discharge of high-temperature steam. After preheating, the waste liquid is sent into the inlet distribution ring 10 fixed at the top of the tank 1 through the inlet pipe 4. The inlet distribution ring 10 has multiple sets of leakage spray nozzles circumferentially opened at the bottom. Under pressure, the waste liquid is sprayed out from these leakage spray nozzles and evenly sprinkled onto the evaporation structure below. The waste liquid first falls onto the solid baffle plate 11 located directly below the inlet distribution ring 10. The top surface of the solid baffle plate 11 is set as a cone. When the waste liquid flow impacts the conical top plate, the waste liquid will be evenly broken and guided to the entire upper surface of the solid baffle plate 11. Then it flows slowly radially to the surrounding edges. This conical top plate design effectively prevents the waste liquid from accumulating at the center point and ensures the uniformity of the liquid film spreading to cooperate with the subsequent efficient evaporation. Subsequently, the waste liquid drips from the edge of the solid baffle 11 onto the annular baffle 12 arranged below it. The annular baffle 12 adopts a unique concave design, that is, the height of its outer peripheral edge is significantly higher than the height of its central area. Therefore, when the waste liquid falls on the outer periphery of the annular baffle 12, under the action of gravity, the waste liquid is forced to flow in the opposite direction, converge towards the center, and finally drip through the flow port 19 opened in the center to the solid baffle 11 of the next layer. By alternating stacking of two sets of solid baffles 11 and two sets of annular baffles 12 inside the tank 1, the waste liquid is forced to form an S-shaped flow path that "diffuses from the center to the surroundings and then converges from the surroundings to the center" inside the tank. This structure greatly increases the flow path and spreading area of ​​the waste liquid within the limited tower height. This mechanism of spreading the waste liquid allows the low-boiling-point solvent in the waste liquid to obtain a larger heating area, and the vaporization rate is increased by more than 3 times, thereby processing more waste liquid per unit time and improving the overall recovery efficiency of the device. While the waste liquid is flowing, the heating tower 2 at the bottom of the tank 1 continuously heats the heating section 7. The high-temperature steam generated by the heating section 7 floats upward and enters the exhaust pipe 5. As the high-temperature steam moves through the exhaust pipe 5, after passing through the spiral section, it enters the flow pipe 18, which is connected to the interior of each set of solid baffles 11 and annular baffles 12. The flow pipe 18 is evenly distributed in a coil shape inside the baffle, so that the heat of the high-temperature steam can be evenly conducted to the entire surface of the baffle. When the waste liquid spreads and flows on the baffle, the plate itself becomes a highly efficient heating surface, continuously baking the liquid film at high temperature, causing the solvent in the waste liquid to quickly vaporize and form secondary steam that moves upward. The beneficial effect is that this embedded flow pipe heating method reduces the thermal resistance loss of heat transferred from the outside to the center of the tank, and the thermal efficiency is much higher than that of traditional jacketed heating. Meanwhile, an annular packing plate 21 is installed in the middle of the tank 1. The annular packing plate 21 is filled with multiple sets of steel wire packing, forming a huge gas-liquid contact surface area. The waste liquid residue decomposed by the last set of annular baffles 12 is fused with external water source drawn by an external water pump through the reflux liquid distributor 15, so as to facilitate its introduction into the heating section 7 at the bottom of the tank 1. The water source used for high-temperature heating of the heating tower 2 also passes through this. The downward-flowing external water source and the upward-flowing hot secondary steam come into countercurrent contact in the gaps of the steel wire packing. The high-boiling-point impurities in the steam are captured by the cold liquid and carried back to the bottom of the tank, while the pure low-boiling-point solvent in the steam breaks through the liquid film and continues to rise. This distillation process ensures the extremely high purity of the final extracted solvent. After being purified by the annular packing plate 21, the high-temperature steam continues to rise. Before entering the exhaust pipe 5, it must pass through the demister 9. The demister 9 intercepts large droplets of liquid entrained in the steam, preventing liquid from being carried into the exhaust pipe and causing product loss or pipeline corrosion. A purity sampling probe 14 is installed between the demister 9 and the inlet of the exhaust pipe 5. This probe extracts a trace amount of steam in real time and sends it to an external online gas chromatograph for component analysis. Most of the high-boiling-point viscous substances and impurities after evaporation will fall into the internal cavity of the heating tower 2 at the bottom of the tank 1. However, a small amount of highly adhesive waste liquid residue will remain firmly attached to the inner wall of the tank 1. When cleaning is required, an external air pump will pressurize the piston cylinder 605 through the air pipe 16. The air pressure will push the piston column 602 inside the piston cylinder 605 to overcome gravity and move upward. The piston rod 602 is fixed to a mounting bracket 603 by bolts or welding at its top. As the piston rod 602 rises, the mounting bracket 603 drives the scraper 601, which is connected to its outer periphery by multiple sliding rods 606, to move upward synchronously. It should be noted that the outer edge curvature of the scraper 601 is precision machined to perfectly match the curvature of the inner wall of the tank 1. With the auxiliary sealing and guiding action of the sealing ring 607 and the compression ring 608, the scraper 601 scrapes upward against the tank wall, removing stubborn impurities adhering to the tank wall in one piece. A linkage steel brush holder is also linked to the bottom of the mounting bracket 603. 604, the steel brush holder has a high-temperature resistant alloy steel wire brush embedded on one side that fits against the tank wall. After the scraper 601 loosens the large scale layer, the linked steel brush holder 604 immediately follows to perform a secondary fine scrubbing of the tank wall, thoroughly removing the remaining tiny powder residue. In addition, a spring 609 is installed inside the top of the piston column 602 for elastic scraping, ensuring that the inner wall of the tank can maintain a certain self-cleaning ability without disassembling the machine or stopping production in high-temperature and corrosive environments. This greatly extends the continuous operation cycle of the equipment, and the cleaning process does not rely on manual entry into confined spaces, making it safe and reliable. It should be noted that an external air pump can also be used to draw air into the piston cylinder 605 through the air pipe 16, causing the piston rod 602 to move back and forth. The linkage steel brush holder 604 is also fixed with a compression ring 608 to cooperate with the slag guide port 17. The waste residue cleaned by the scraper 601 and the linkage steel brush frame 604 falls to the bottom of the tank under the action of gravity, and flows into a specific storage box through the slag guide port 17 opened inside the heating tower 2 to wait for unified discharge.

[0026] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A high-efficiency and energy-saving chemical recycling device and recycling method, comprising a tank (1), characterized in that, The tank body (1) is equipped with a demister (9), an inlet distribution ring (10), two sets of solid baffles (11), and two sets of annular baffles (12), with the solid baffles (11) and annular baffles (12) cooperating. The tank body (1) is equipped with a return liquid distributor (15), and a sludge removal mechanism (6) is equipped inside the tank body (1). The sludge removal mechanism (6) includes a scraper (601), a piston column (602), a fixing frame (603), a linkage steel brush frame (604), a piston cylinder (605), a sliding rod (606), a sealing ring (607), a squeezing ring (608), and a spring (609). The scraper (601) is located on the outer periphery of the piston column (602), and the outer side of the scraper (601) is... The piston column (602) is located inside the tank body (1), the fixing bracket (603) is fixed inside the tank body (1), the linkage steel brush bracket (604) is located outside the piston column (602), the piston cylinder (605) is located inside the piston column (602), the sliding rod (606) is located outside the piston column (602), the sealing ring (607) is located outside the piston column (602), the compression ring (608) is located at the bottom end of the linkage steel brush bracket (604), the spring (609) is located inside the piston column (602), the bottom end of the tank body (1) is provided with an exhaust pipe (5), the outside of the tank body (1) is connected to an inlet pipe (4), and a section of the inlet pipe (4) spirals around to the outside of the exhaust pipe (5). The inside of the tank body (1) is provided with an annular packing plate (21).

2. The high-efficiency energy-saving chemical recycling device and recycling method according to claim 1, characterized in that: The tank (1) is equipped with a purity sampling probe (14) inside and a storage box (3) is provided on the outside of the tank (1).

3. The high-efficiency energy-saving chemical recycling device and recycling method according to claim 1, characterized in that: The tank (1) is equipped with a reflux liquid distributor (15) and a water inlet pipe (20) connected to the reflux liquid distributor (15).

4. The high-efficiency energy-saving chemical recycling device and recycling method according to claim 1, characterized in that: The piston rod (602) has a groove on its outer side that matches the sealing ring (607), and the piston rod (602) has a sliding cavity inside that corresponds to the fixing bracket (603).

5. The high-efficiency energy-saving chemical recycling device and recycling method according to claim 2, characterized in that: The storage box (3) has a cavity inside that cooperates with the exhaust pipe (5). One end of the exhaust pipe (5) is provided with an air pipe that is connected to the solid baffle plate (11) and the annular baffle plate (12).

6. The high-efficiency energy-saving chemical recycling device and recycling method according to claim 1, characterized in that: Both the solid baffle (11) and the annular baffle (12) are equipped with flow pipes (18), and the annular baffle (12) has a flow port (19) in the center.

7. The high-efficiency energy-saving chemical recycling device and recycling method according to claim 1, characterized in that: The bottom of the tank (1) is provided with a heating tower (2), and the bottom of the tank (1) is provided with a heating part (7), and the heating part (7) is in contact with the heating tower (2).

8. The high-efficiency energy-saving chemical recycling device and recycling method according to claim 1, characterized in that: The tank body (1) has a slag guide port (17) at the bottom inside, and one end of the piston cylinder (605) is connected to a vent pipe (16).

9. The high-efficiency energy-saving chemical recycling device and recycling method according to claim 1, characterized in that: The tank (1) has a processing chamber (13) inside, and a protective ring (8) is provided at the bottom of the tank (1), and the protective ring (8) matches the piston cylinder (605).

10. The efficient and energy-saving chemical recycling method according to claim 1, characterized in that: S1. Waste liquid is preheated and waste heat is recovered by spirally winding high temperature exhaust pipe (5) through inlet pipe (4). Then it enters inlet distribution ring (10) and is evenly sprayed onto the top surface of solid baffle plate (11) through the lower liquid leakage nozzle to achieve uniform liquid film spreading. S2. The waste liquid flows alternately between the solid baffle (11) and the concave annular baffle (12) to form an S-shaped path. The coiled flow pipe (18) inside the baffle is filled with high-temperature steam to uniformly heat the plate surface. After the waste liquid is spread, the low-boiling-point solvent quickly vaporizes and rises. S3. Secondary steam enters the annular baffle (12) and comes into countercurrent contact with the return liquid. High boiling point components are condensed and carried back to the bottom of the tank (1). Pure components continue to rise and are intercepted by the demister (9) and then extracted and detected in real time by the purity sampling probe (14). S4. The heating tower (2) continuously heats the residual liquid at the bottom of the tank (1) to generate steam. Impurities adhering to the wall of the tank (1) are removed by a pneumatically driven scraper (601) and a secondary scrubbing by a linked steel brush frame (604). Waste slag flows out through the slag guide port (17). The cleaning process does not require stopping the machine.

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