Furfural gas-slag separation device and separation method thereof

Abstract

The furfural gas-residue separation device comprises a condensation box, an air separator and a spraying separator, a cyclone separator is connected with the spraying separator through a first air pipe, the spraying separator is connected with the condensation box through a second air pipe, the cyclone separator comprises a cyclone separation cylinder, and the cyclone separation cylinder is connected with the spraying separator through a second air pipe. A first air return pipe is arranged in the center of the upper end in the cyclone separation cylinder; the spraying separator comprises a spraying separation cylinder, an inner rotating cylinder is arranged in the spraying separation cylinder, a plurality of suspension wires are arranged at the upper end in the spraying separation cylinder and the lower end of the inner rotating cylinder, a plurality of suspension beads are arranged on each suspension wire, a second air return pipe is arranged in the center in the inner rotating cylinder, and a spraying pipe is arranged on one side of the second air return pipe; the furfural gas residues are subjected to multi-stage separation in various forms of centrifugal gravity, centrifugal spraying and shaking filtering, and layer-by-layer pushing is performed, so that the separation effect of the furfural gas residues is improved, and the purity of furfural gas is improved; in addition, in the spraying separation process, furfural gas residues can be pre-cooled at the same time, and the condensation efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas-slag separation, and particularly relates to a furfural gas-slag separation device and a separation method thereof. Background Art

[0002] Furfural, also known as furan formaldehyde, is a light yellow or amber transparent liquid. It has a wide range of applications in many fields such as synthetic resins, petroleum refining, and medicine.

[0003] In the existing furfural production process, a furfural gas-slag separation device is involved in separating the gas and slag in the furfural production process to obtain furfural slag and pure furfural gas or liquid for furfural recovery and utilization.

[0004] For the furfural gas-slag separation device, in the prior art, after retrieval, the patent with the Chinese patent publication number CN221788551U discloses a gas-slag separation and collection device for furfural production, which mainly includes a separation box and a condensation box. The separation box and the condensation box are connected by a gas pipe. A filter screen is provided in the separation box to separate furfural gas and furfural slag, and the condensation box is used to condense the separated furfural gas for recovery and utilization.

[0005] In the prior art, for the furfural gas-slag separation device with a technical solution similar to the above, it is found that there are certain defects in the actual implementation process: only a single-stage separation of the gas and slag is carried out through the separation box, and the separation is carried out through the filter screen in the separation box. It is difficult to remove the solid slag with a relatively small particle size in the furfural gas-slag, resulting in incomplete separation and affecting the recovery purity of furfural gas. Summary of the Invention

[0006] In view of the deficiencies and defects existing in the prior art, the purpose of the present invention is to provide a furfural gas-slag separation device and a separation method thereof, which solve the problem that the furfural gas-slag separation device in the prior art only performs a single-stage separation of the gas and slag through the separation box, and the separation is carried out through the filter screen in the separation box. It is difficult to remove the solid slag with a relatively small particle size in the furfural gas-slag, resulting in incomplete separation and affecting the recovery purity of furfural gas.

[0007] To solve the above technical problems, the present invention adopts the following technical solutions: A furfural gas residue separation device includes a condensation box, and also includes a cyclone separator and a spray separator. The cyclone separator is connected to the spray separator through a first air pipe, and the spray separator is connected to the condensation box through a second air pipe. The cyclone separator includes a cyclone separation cylinder. A recovery cylinder is provided at the bottom end of the cyclone separation cylinder. A first return air pipe is provided in the center of the upper end inside the cyclone separation cylinder. The upper end of the first return air pipe extends out of the furfural inlet pipe and is connected to the first air pipe. The top end of the cyclone separation cylinder is connected to the furfural inlet pipe. A gas spiral guide member is provided between the upper end inside the cyclone separation cylinder and the outer wall of the first return air pipe. A rectifying guide vane is provided at the lower end inside the first return air pipe. A bowl-shaped silica gel guide and cleaning member is provided below the rectifying guide vane inside the cyclone separation cylinder. The silica gel guide and cleaning member is connected to a driving member that drives its up and down movement, horizontal movement, and rotation. The silica gel guide and cleaning member is used to guide the furfural gas towards the first return air pipe, and at the same time block to reduce the return of the furfural residue below into the first return air pipe with the furfural gas. And the silica gel guide and cleaning member can extend into the space between the cyclone separation cylinder and the first return air pipe to clean the furfural residue on the inner wall of the cyclone separation cylinder; The spray separator includes a spray separation cylinder. A filter screen is provided at a position near the lower end inside the spray separation cylinder. An inner rotating cylinder is rotatably provided near the upper end inside the spray separation cylinder. A plurality of suspension lines are provided at the upper end inside the spray separation cylinder and the lower end of the inner rotating cylinder. A plurality of suspension beads are provided on each suspension line. A plurality of convex feet that can contact the suspension lines above the spray separation cylinder are fixed at the upper end of the inner rotating cylinder. A connecting pipe connected to the first air pipe is provided at the top end of the inner rotating cylinder. An air outlet is provided at a position near the upper end outside the inner rotating cylinder. A blanking port is provided at the bottom end of the inner rotating cylinder. A second return air pipe is provided in the center inside the inner rotating cylinder. The upper end of the second return air pipe extends out of the inner rotating cylinder. A plurality of rotating blades are provided on the second return air pipe. A spray pipe is provided on one side of the second return air pipe. Spray nozzles are provided on the spray pipe inside the inner rotating cylinder. The lower end of the spray pipe extends out of the inner rotating cylinder and extends below the filter screen.

[0008] As a further improvement of the present invention, the gas spiral guide member includes a sleeve ring. The sleeve ring is fixed on the first return pipe. A plurality of arc-shaped guide plates that are twisted and inclined towards the counterclockwise direction are fixed on the outside of the sleeve ring. The outside of the guide plate is fixed on the cyclone separation cylinder.

[0009] As a further improvement of the present invention, the lower end of the rectifying guide vane extends out of the first return pipe. The rectifying guide vane includes a plurality of wing plates. The wing plates are arc-shaped. The middle parts of the plurality of wing plates are fixedly connected together, and the lower ends of the wing plates are twisted towards the clockwise direction.

[0010] As a further improvement of the present invention, the cyclone separation cylinder includes a cylindrical cylinder at the upper end and a conical cylinder at the lower end. The lower end of the conical cylinder is connected to the recovery cylinder. The diameter of the recovery cylinder is larger than the diameter of the bottom port of the conical cylinder. The upper end of the cylindrical cylinder is connected to the furfural inlet pipe through a docking flange.

[0011] As a further improvement of the present invention, the driving member includes a sliding rod, a telescopic rod, a slider, a fixed rod and a first motor. The sliding rod is rotatably arranged on the cyclone separation cylinder, the fixed rod is fixed inside the cyclone separation cylinder and is below the sliding rod. A first motor is provided in the middle of the fixed rod, and the output shaft of the first motor is connected to the sliding rod. The lower end of the silica gel diversion and cleaning member is provided with a telescopic rod, and the bottom end of the telescopic rod is provided with a slider. The slider is slidably arranged on the sliding rod, and one side of the slider is connected to an electric push rod that drives its sliding.

[0012] As a further improvement of the present invention, the inner rotating cylinder includes an upper rotating cover and a lower rotating cylinder. The upper rotating cover is an arc-shaped structure, and the lower rotating cylinder is a conical cylinder. The lower end of the upper rotating cover bends inward and extends into the lower rotating cylinder. An air outlet is left between the upper rotating cover and the lower rotating cylinder, and the upper rotating cover and the lower rotating cylinder are connected by connecting ribs. The outer side of the lower rotating cylinder is rotatably connected to the spray separation cylinder.

[0013] As a further improvement of the present invention, the connecting pipe extends into the inner rotating cylinder and is fixedly connected to the inner rotating cylinder. The upper end of the connecting pipe extends out of the spray separation cylinder and is rotatably connected to the spray separation cylinder. The upper end of the connecting pipe is rotatably connected to the first air pipe.

[0014] As a further improvement of the present invention, a first gear is fixed on the connecting pipe, and a second gear is rotatably arranged at the upper end of the spray separation cylinder. The first gear and the second gear are meshed and connected, and the second gear is connected to a second motor that drives its rotation.

[0015] As a further improvement of the present invention, stirring blades are provided above the filter screen at the lower end of the spray pipe.

[0016] A separation method for separating gas and slag using a furfural gas-slag separation device: includes the following steps: (1) Primary separation: Furfural gas-slag is guided into the cyclone separation cylinder from the upper end of the cyclone separation cylinder through the gas spiral diversion member. The furfural gas-slag entering the cyclone separation cylinder runs spirally downward. The furfural slag in the furfural gas-slag is thrown onto the inner wall of the cyclone separation cylinder under the action of centrifugal force and flows downward into the recovery cylinder under the action of gravity. The furfural gas from which part of the furfural slag has been removed flows into the first air pipe from the first return pipe through the rectification of the sorting guide vane, completing the primary separation of the furfural gas-slag. (2)Secondary separation and temperature reduction: Rotate to open the inner rotating cylinder and the spray pipe. The furfural gas residue in the first air pipe enters the inner rotating cylinder through the connecting pipe. The second return pipe rotates with the inner rotating cylinder and agitates the furfural gas residue entering the inner rotating cylinder. During the agitation, the furfural residue in the furfural gas residue falls downward from the discharge port to the bottom of the spray separation cylinder under the combined action of centrifugal force, spray scouring, and gravity. Part of the furfural gas in the furfural gas residue enters the upper end of the inner rotating cylinder upward through the second return pipe, part flows out of the inner rotating cylinder to the outside of the inner rotating cylinder through the air outlet, and part flows downward through the discharge port and then turns upward in a countercurrent manner, completing the secondary separation and temperature reduction of the furfural gas residue; (3)Tertiary separation: During the rotation of the inner rotating cylinder, the suspension line and the hanging beads are toggled or swung. The remaining furfural residue and the entrained spray liquid in the furfural gas entering the suspension line flow downward under the blocking filtration, turbulent flow jitter, and gravity of the suspension line, completing the tertiary separation of the furfural gas residue. The separated furfural gas enters the second air pipe; (4)Condensation of furfural gas: The furfural gas enters the condensation box for condensation and recovery; (5)Cleaning of the inner wall of the cyclone separator: After all the separation work of the furfural gas residue is completed, move the center of the silica gel diversion cleaning part to the lower position between the inner wall of the cyclone separator and the outer wall of the first return pipe to one side, and move the silica gel diversion cleaning part upward so that the silica gel diversion cleaning part moves upward between the inner wall of the cyclone separator and the outer wall of the first return pipe. Move the silica gel diversion cleaning part up and down and rotate the silica gel diversion cleaning part. The silica gel diversion cleaning part cleans the inner wall of the cyclone separator, the outer wall of the first return pipe, and the outside of the rectifying guide vane.

[0017] Compared with the prior art, the present invention has the following advantages: 1. By setting a cyclone separator, a spray separator, and a condensation box, and setting the cyclone separator as a structure of a cyclone separation cylinder, a first return pipe, a gas spiral diversion part, a rectifying guide vane, and a silica gel diversion cleaning part, the gas spiral diversion part can conduct spiral diversion on the furfural gas residue entering the cyclone separation cylinder, enabling the furfural gas residue to flow downward in a spiral manner. When the furfural gas in the furfural gas residue reaches the lower end, it flows upward through the first return pipe, while the furfural residue in the furfural gas residue flows downward along the wall of the cyclone separation cylinder to the recovery cylinder under the action of centrifugal gravity. The centrifugal gravity of the cyclone separator can remove most of the furfural residue in the furfural gas residue, completing the primary separation of the furfural gas residue; The spray separator is configured to have a structure of a spray separation cylinder, a spray pipe, an inner rotating cylinder, a hanging wire and a hanging bead. The spraying of the spray pipe in the inner rotating cylinder causes the furfural slag in the furfural gas slag to adhere to the liquid and become heavier, thereby settling downward. At the same time, the rotation of the inner rotating cylinder and the stirring of the rotating blades on the spray pipe cause the furfural gas slag to pass through the discharge port of the inner rotating cylinder and sink to the bottom of the spray separation cylinder under the multiple interactions of centrifugal force and the entrainment of the spray liquid, while the furfural gas can flow upward to the top of the spray separation cylinder through the second reflux pipe and the gas outlet. Even smaller particles of furfural slag can be well removed, and the separation effect is good, completing the secondary separation of furfural gas slag, and the separation effect is greatly improved. In addition, while the furfural gas slag is sprayed and separated, the spray liquid can also wash the inner wall of the inner rotating cylinder to reduce the adhesion of the furfural slag on the inner wall of the inner rotating cylinder, and the technical effect is good. By arranging hanging wires and hanging beads above the spray separation cylinder and below the inner rotating cylinder, the hanging wires and hanging beads can form a filtering barrier to filter the furfural slag in the furfural gas slag and the spray liquid carried out; secondly, driven by the rotation of the inner rotating cylinder, they are constantly shaken to form vibrators and spoilers, which can shake, vibrate and disturb the furfural slag in the furfural gas slag and the filtrate carried out, so as to shake off and sink the residual furfural slag and the spray liquid in the furfural gas slag, thereby completing the three-stage separation of furfural gas slag.

[0018] In short, by subjecting the furfural gas residue to multi-stage separation in various forms such as centrifugal gravity, centrifugal spraying and shaking filtration, the separation effect of furfural gas residue is improved layer by layer, and the purity of furfural gas is improved; in addition, in the process of spray separation, the furfural gas residue can be pre-cooled at the same time to reduce the temperature of the furfural gas entering the condensation box, thereby reducing the condensation temperature difference and improving the condensation efficiency. The separation and pre-cooling of furfural gas residue can be completed simultaneously without additional components, and the structure is compact and simple, with good effect.

[0019] In addition, the secondary separation and tertiary separation of furfural gas and slag can cooperate and coordinate with each other, the secondary separation is carried out inside the inner rotating cylinder, and the tertiary separation is carried out outside the inner rotating cylinder, and the rotation of the inner rotating cylinder drives the flow disturbance of furfural gas and slag inside and outside at the same time, and the rotation of the inner rotating cylinder can drive the hanging wire and hanging beads to shake, so as to help the hanging wire and hanging beads to separate the furfural gas and slag in the tertiary stage, and the secondary and tertiary separations work in coordination with each other, with a compact structure and reduced power source. In addition, when the hanging wire and hanging beads on the inner rotating cylinder rotate, the bottom of the hanging wire and hanging beads swing outward to contact the inner wall of the spray separation cylinder, thereby scraping off the furfural slag adhering to the inner wall of the furfural separation cylinder. The setting of one component plays multiple roles and has a good technical effect.

[0020] In addition, by arranging a filter screen at the lower end of the spray separation cylinder and extending the spray pipe into the lower end of the filter screen, the filter screen can filter the spray liquid flowing to the lower side of the spray separation cylinder, reducing or avoiding the entry of furfural residues into the lower end of the filter screen. Then the spray liquid at the lower end of the filter screen can return to the spray pipe again, forming an internal spray liquid circulation. And there is spray liquid on the lower side of the spray separation cylinder. After the furfural residues fall into the spray liquid, the furfural residues are prevented from flowing upward with the furfural gas under the gravitational entrainment of the spray liquid, improving the separation effect.

[0021] In addition, by arranging a rectifying guide vane, the spiral gas at the bottom can be concentrated and guided upward, facilitating the rise of the gas and reducing the vibration of the first return pipe.

[0022] And a bowl-shaped silica gel guide and cleaning part is arranged below the rectifying guide vane. The silica gel guide and cleaning part is connected to a driving part that drives it to move up and down, horizontally and rotate. The setting of the silica gel guide and cleaning part, firstly, can block the furfural gas flowing downward to a certain extent, reducing the continuous downward flow of the furfural gas into the furfural residues below, facilitating the upward reflux of the furfural gas; secondly, for the small amount of furfural gas flowing to the lower part of the silica gel guide and cleaning part, during the upward rising process, it can block the furfural residues in the furfural gas slag from rising, so that the furfural residues are blocked and fall under the action of gravity, reducing the upward back-carrying of the furfural residues; thirdly, after the separation of the furfural gas slag is completed, the silica gel guide and cleaning part can be moved to one side and run upward to between the first return pipe and the cyclone separator, and then continuously move the silica gel guide and cleaning part up and down and rotate the silica gel guide and cleaning part, so as to complete the cleaning of the inner wall of the cyclone separator and the outer wall of the first return pipe, reducing the adhesion of furfural residues. In addition, when the silica gel guide and cleaning part moves upward to between the first return pipe and the cyclone separator, it will turn downward into an umbrella shape under the block of the first return pipe, facilitating the shaking off of the furfural residues on the silica gel guide and cleaning part. The setting of one component plays different roles in different states, with a compact structure and strong functionality.

[0023] 2. By setting the gas spiral guide member as a sleeve ring and a guide plate structure, the gas entering the cyclone separator can be spirally introduced, so as to generate a centrifugal force in the cyclone separator, which helps the separation of furfural gas slag.

[0024] 3. By setting the rectifying guide vane as a wing plate, the wing plate is arc-shaped, and the lower end of the wing plate is twisted towards the clockwise direction, the spiral furfural gas can be guided upward, facilitating the upward reflux of the furfural gas.

[0025] 4. By setting up the structure of the driving member with a sliding rod, a telescopic rod, a slider, a fixed rod, and a first motor, the slider is driven to slide by the telescopic movement of the electric push rod, enabling the silicone guide and cleaning member to move to the center of the cyclone separator or between the outer wall of the first return pipe and the inner wall of the cyclone separator. The telescopic movement of the telescopic rod can drive the silicone guide and cleaning member to move up and down, and the first motor can drive the sliding rod to rotate, thereby driving the silicone guide and cleaning member to rotate, thus completing the cleaning of the inner wall of the cyclone separator.

[0026] 5. By setting the inner rotating cylinder as the structure of an upper rotating cover and a lower rotating cylinder, and the upper rotating cover is an arc-shaped structure, and the lower rotating cylinder is a conical cylinder. There is an air outlet between the upper rotating cover and the lower rotating cylinder. The conical structure of the lower rotating cylinder facilitates the downward sedimentation flow of the furfural residue during the secondary separation, and at the same time facilitates the reflux and overflow of the furfural gas. At the same time, during the tertiary separation, it is convenient to intercept the upward flowing furfural gas to block and remove the furfural residue and spraying liquid in the furfural gas, facilitating the separation of the furfural gas and residue, and enabling the synergistic effect of the secondary and tertiary separations of the furfural gas and residue.

[0027] 6. By setting a first gear on the connecting pipe, and a second gear is rotatably provided at the upper end of the spraying and separating cylinder, and the second gear is connected to the second motor. Then the second motor can drive the second gear to rotate, and the rotation of the second gear drives the first gear to rotate, thereby driving the inner rotating cylinder to rotate.

[0028] 7. By setting stirring blades at the lower end of the spraying pipe, the spraying pipe can not only be used to spray the furfural gas and residue, but also stir the spraying liquid at the bottom to facilitate the rapid overflow of the furfural gas entering the spraying liquid. One component can complete multiple functions simultaneously, with strong functionality.

[0029] 8. By using a separation method for separating the furfural gas and residue with a furfural gas and residue separation device, the cyclone centrifugal primary separation, spraying centrifugal secondary separation, and filtering and shaking tertiary separation of the furfural gas and residue can be realized, improving the separation effect of the furfural gas and residue. In addition, during the secondary separation process, the furfural gas can be pre-cooled simultaneously, thereby reducing the condensation temperature difference, improving the condensation efficiency, reducing the operation steps, and without the need to additionally set components, the separation and pre-cooling of the furfural gas and residue can be completed synchronously, with a compact and simple structure and good effect. In addition, during the tertiary separation process, the spraying liquid and residual furfural residue carried out during the secondary separation in the furfural gas can be removed simultaneously, simplifying the operation steps and improving the separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following further describes the present invention with reference to the accompanying drawings: Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic cross-sectional structural diagram of the cyclone separator; Figure 3 Schematic cross-sectional structure diagram of the spray separator; Figure 4 is Figure 2 an enlarged view at A; Figure 5 is Figure 3 an enlarged view at B; In the figure: 1. Condensation box; 2. Cyclone separator; 201. Cylindrical barrel; 202. Conical barrel; 3. Spray separator; 301. Spray separation barrel; 302. Filter screen; 303. Inner rotating cylinder; 3031. Upper rotating cover; 3032. Lower rotating cylinder; 3033. Connecting rib; 304. Suspension line; 305. Suspension bead; 306. Convex foot; 307. Connecting pipe; 308. Air outlet; 309. Discharge port; 310. Second return air pipe; 311. Rotary vane; 312. Spray pipe; 4. Driving member; 401. Slide bar; 402. Telescopic rod; 403. Slide block; 404. Fixed rod; 405. First motor; 406. Electric push rod; 5. Second air pipe; 6. Recovery barrel; 7. First return air pipe; 8. Gas spiral guide member; 801. Sleeve ring; 802. Deflector; 9. Rectifying guide vane; 901. Wing plate; 10. Silicone guide and cleaning member; 101. Guide hole; 102. Material passing hole; 11. First air pipe; 12. First gear; 13. Second gear; 14. Second motor; 15. Stirring blade; 16. Furfural inlet pipe; 161. Vertical pipe section; 162. Horizontal pipe section; 163. Bottom connecting plate; 164. Sealing cover; 17. Docking flange; 18. Rotary joint. Specific embodiments

[0031] The following will further describe the present invention in detail with reference to the Figures 1-5 accompanying drawings. For clearer illustration, only the structures related to the inventive points of the present invention are shown in the figures.

[0032] For convenience of description, a coordinate system is now defined as Figure 1 shown, and the left - right direction is defined as the transverse direction, the front - back direction is defined as the longitudinal direction, and the up - down direction is defined as the vertical direction.

[0033] An embodiment of the present invention discloses a furfural gas - residue separation device. Referring to Figure 1 , a furfural gas - residue separation device includes a condensation box 1. The condensation box 1 can be a commonly used gas condensation box 1 in the prior art, which is used to condense furfural gas into liquid for convenient recovery.

[0034] In addition, the present invention also includes a cyclone separator 2 and a spray separator 3, as shown in Figure 1 and Figure 2As shown in the figure, the cyclone separator 2 is connected to the spray separator 3 through the first air pipe 11. The spray separator 3 is connected to the condensation box 1 through the second air pipe 5. The cyclone separator 2 includes a cyclone separation cylinder. The bottom end of the cyclone separation cylinder is fixedly connected to a recovery cylinder 6 for recovering furfural residues. The cyclone separation cylinder includes a cylindrical cylinder 201 at the upper end and a conical cylinder 202 at the lower end. The cylindrical cylinder 201 and the conical cylinder 202 are integrally formed. The lower end of the conical cylinder 202 can be connected to the recovery cylinder 6 through bolts or latches, etc. The diameter of the recovery cylinder 6 is larger than the diameter of the bottom port of the conical cylinder 202. The upper end of the cylindrical cylinder 201 is detachably connected to the furfural inlet pipe 16 through a docking flange 17.

[0035] As Figure 1 shown in the figure, a first return air pipe 7 is fixedly connected to the center of the upper end inside the cyclone separation cylinder. The upper end of the first return air pipe 7 extends out of the furfural inlet pipe 16 and is detachably connected to the first air pipe 11. The furfural inlet pipe 16 includes a vertical pipe section 161. The bottom end of the vertical pipe section 161 is fixedly welded to one of the docking flanges 17. A horizontal pipe section 162 is fixedly welded to the left side of the vertical pipe section 161. A bottom connecting plate 163 is fixed at the top end of the vertical pipe section 161. The upper end of the first return air pipe 7 passes through the vertical pipe section 161, and two semi-circular sealing covers 164 are detachably connected to the upper end of the bottom connecting plate 163 through bolts.

[0036] As Figure 2 shown in the figure, a gas spiral guide member 8 is provided between the upper end inside the cyclone separation cylinder and the outer wall of the first return air pipe 7. The gas spiral guide member 8 is used to spiral guide the gas entering the cyclone separation cylinder. The gas spiral guide member 8 specifically includes a sleeve ring 801. The sleeve ring 801 is fixedly welded to the first return pipe. A plurality of arc-shaped guide plates 802 that are twisted and inclined toward the counterclockwise direction are fixed to the outside of the sleeve ring 801. The outer sides of the guide plates 802 are fixedly welded to the inner wall of the cyclone separation cylinder. By setting the gas spiral guide member 8 as the structure of the sleeve ring 801 and the guide plates 802, the gas entering the cyclone separation cylinder can be spirally introduced, so as to generate a centrifugal force inside the cyclone separation cylinder, which helps the separation of furfural gas residues.

[0037] As Figure 2 shown in the figure, a rectifying guide vane 9 is provided at the lower end inside the first return air pipe 7. The lower end of the rectifying guide vane 9 extends out of the first return pipe. The rectifying guide vane 9 includes a plurality of wing plates 901. The wing plates 901 are arc-shaped. The middle parts of the plurality of wing plates 901 are fixedly connected together, and the lower ends of the wing plates 901 are twisted toward the clockwise direction. The twisting direction of the wing plates 901 of the rectifying guide vane 9 is opposite to the guiding direction of the gas spiral guide member 8. By setting the rectifying guide vane 9 as the wing plates 901, the wing plates 901 are arc-shaped, and the lower ends of the wing plates 901 are twisted toward the clockwise direction, the spiral furfural gas can be intercepted and guided upward, which is convenient for the concentrated upward reflux of furfural gas.

[0038] As Figure 2 and Figure 4 shown, a bowl-shaped silica gel diversion and cleaning part 10 is provided at the lower end of the rectifying guide vane 9 inside the cyclone separation cylinder. The silica gel diversion and cleaning part 10 can be turned downward and deformed. A plurality of diversion holes 101 are provided on the silica gel diversion and cleaning part 10, and a material passing hole 102 is provided at the bottom of the silica gel diversion and cleaning part 10. The settings of the diversion holes 101 and the material passing hole 102 facilitate the downward feeding of a small amount of residual furfural residues, and at the same time facilitate the downward turning and deformation of the silica gel diversion part. After the silica gel diversion part is turned downward and deformed, it forms an umbrella shape. The silica gel diversion and cleaning part 10 is connected to a driving part 4 that drives it to move up and down, horizontally, and rotate. The silica gel diversion and cleaning part 10 is used to divert the furfural gas to the first return air pipe 7, and at the same time block it to reduce the return of the furfural residues below into the first return air pipe 7 with the furfural gas. In addition, the silica gel diversion and cleaning part 10 can also extend into the space between the cyclone separation cylinder and the first return air pipe 7 to clean the furfural residues on the inner wall of the cyclone separation cylinder. For the driving part 4, specifically, the driving part 4 includes a sliding rod 401, a telescopic rod 402, a slider 403, a fixed rod 404, and a first motor 405. The sliding rod 401 is rotatably arranged on the cyclone separation cylinder. The fixed rod 404 is fixed inside the cyclone separation cylinder and is located below the sliding rod 401. The first motor 405 is fixed in the middle of the fixed rod 404. The output shaft of the first motor 405 is connected to the sliding rod 401. The lower end of the silica gel diversion and cleaning part 10 is provided with a telescopic rod 402. The telescopic rod 402 can adopt telescopic parts such as a hydraulic push rod and an electric push rod 406 that can automatically expand and contract. The bottom end of the telescopic rod 402 is fixed with a slider 403. The slider 403 is slidably arranged on the sliding rod 401, and one side of the slider 403 is connected to the electric push rod 406 that drives it to slide. Then, the expansion and contraction of the electric push rod 406 drives the slider 403 to slide, enabling the silica gel diversion and cleaning part 10 to move to the center of the cyclone separation cylinder or to the corresponding position below between the outer wall of the first return pipe and the inner wall of the cyclone separation cylinder. The expansion and contraction of the telescopic rod 402 can drive the silica gel diversion and cleaning part 10 to move up and down, and the first motor 405 can drive the sliding rod 401 to rotate, thereby driving the silica gel diversion and cleaning part 10 to rotate, so as to complete the cleaning of the inner wall of the cyclone separation cylinder.

[0039] As Figure 1 、 Figure 3 and Figure 5As shown, the spray separator 3 includes a spray separation cylinder 301. There is spray liquid below the spray separation cylinder 301, and the spray liquid is a liquid that is incompatible with furfural gas. In addition, heat sinks can be welded to the outer side of the bottom end of the spray separation cylinder 301 or several cooling fans can be provided. The cooling fans can cool the spray liquid. The heat sinks and the cooling fans are not shown in the drawings, and the structure and arrangement form of the heat sinks can adopt the common arrangement methods of heat sinks in the prior art. A discharge port is provided at the upper right end of the spray separation cylinder 301. The discharge port is connected to the second air pipe 5. An air pump can be provided on the second air pipe 5 to provide the conveying power for the furfural gas, and a screen can be provided on the discharge port. A filter screen 302 is provided near the lower end inside the spray separation cylinder 301. In addition, the spray separation cylinder 301 can be made in a split manner. Specifically, the spray separation cylinder 301 includes a bottom cylinder and an upper cylinder, and the bottom cylinder and the upper cylinder are connected by threads or buckles. The filter screen 302 is arranged inside the bottom cylinder.

[0040] As Figure 3 and Figure 5 shown, an inner rotating cylinder 303 is rotatably arranged near the upper end inside the spray separation cylinder 301. A plurality of suspension lines 304 are provided at the upper end inside the spray separation cylinder 301 and the lower end of the inner rotating cylinder 303. A plurality of suspension beads 305 are provided on each suspension line 304. A plurality of convex feet 306 that can contact the suspension lines 304 above the spray separation cylinder 301 are fixed to the upper end of the inner rotating cylinder 303. A connecting pipe 307 connected to the first air pipe 11 is provided at the top end of the inner rotating cylinder 303. The connecting pipe 307 extends into the inner rotating cylinder 303 and is fixedly connected to the inner rotating cylinder 303. The upper end of the connecting pipe 307 extends out of the spray separation cylinder 301 and is rotatably connected to the spray separation cylinder 301. The upper end of the connecting pipe 307 is rotatably connected to the first air pipe 11 through a rotary joint 18. A first gear 12 is fixedly connected to the connecting pipe 307. A second gear 13 is rotatably arranged at the upper end of the spray separation cylinder 301. The first gear 12 and the second gear 13 are meshed and connected, and the second gear 13 is connected to a second motor 14 that drives its rotation. By providing the first gear 12 on the connecting pipe 307, the second gear 13 is rotatably arranged at the upper end of the spray separation cylinder 301, and the second gear 13 is connected to the second motor 14, the second motor 14 can drive the second gear 13 to rotate. The rotation of the second gear 13 drives the first gear 12 to rotate, thereby driving the inner rotating cylinder 303 to rotate.

[0041] As Figure 2 and Figure 5As shown in the figure, an air outlet 308 is provided near the upper end on the outer side of the inner rotating cylinder 303, and a blanking port 309 is provided at the bottom end of the inner rotating cylinder 303. The specific structure of the inner rotating cylinder 303 is as follows: the inner rotating cylinder 303 includes an upper rotating cover 3031 and a lower rotating cylinder 3032. The upper rotating cover 3031 is of an arc-shaped structure, and the lower rotating cylinder 3032 is a conical cylinder 202. The lower end of the upper rotating cover 3031 bends inward and extends into the lower rotating cylinder 3032. An air outlet 308 is left between the upper rotating cover 3031 and the lower rotating cylinder 3032, and the upper rotating cover 3031 and the lower rotating cylinder 3032 are connected by connecting ribs 3033. The outer side of the lower rotating cylinder 3032 is rotatably connected to the spray separation cylinder 301. The rotational connection form between the lower rotating cylinder 3032 and the spray separation cylinder 301 can adopt a common rotational structure in the prior art. For example, a slip ring can be fixedly connected to the inner wall of the spray separation cylinder 301, and an annular slide bar that is slidably matched with the slip ring is fixedly connected to the lower rotating cylinder 3032. The conical structure of the lower rotating cylinder 3032 facilitates the downward settlement and flow of furfural residues during secondary separation, and at the same time facilitates the reflux and overflow of furfural gas. At the same time, during tertiary separation, it is convenient to intercept the upward flowing furfural gas, so as to block and remove the furfural residues and spray liquid in the furfural gas, facilitating the separation of furfural gas and residues, and enabling the secondary and tertiary synergistic effects of furfural gas and residues.

[0042] As Figure 5 shown in the figure, a second return air pipe 310 is provided in the center of the inner rotating cylinder 303. The upper end of the second return air pipe 310 extends out of the inner rotating cylinder 303. A plurality of rotating blades 311 are provided on the second return air pipe 310. A spray pipe 312 is provided on one side of the second return air pipe 310. Sprayers are provided on the spray pipe 312 inside the inner rotating cylinder 303. The lower end of the spray pipe 312 extends out of the inner rotating cylinder 303 and extends below the filter screen 302. A stirring blade 15 is provided above the filter screen 302 at the lower end of the spray pipe 312. A water pump capable of lifting the spray liquid upward can be connected to the spray pipe 312. The filter screen 302 can filter the spray liquid flowing to the lower side of the spray separation cylinder 301, reducing or avoiding the entry of furfural residues into the lower end of the filter screen 302. Then the spray liquid at the lower end of the filter screen 302 can return to the spray pipe 312 again, forming an internal spray liquid circulation. In addition, after the furfural residues fall into the spray liquid, the furfural residues are wrapped by the gravity of the spray liquid, avoiding flowing upward with the furfural gas and improving the separation effect.

[0043] By providing a stirring blade 15 at the lower end of the spray pipe 312, the spray pipe 312, in addition to being able to spray the furfural gas and residues, can also stir the spray liquid at the bottom, facilitating the rapid overflow of the furfural gas entering the spray liquid. One component can complete multiple functions at the same time, with strong functionality.

[0044] In the present invention, by providing a cyclone separator 2, a spray separator 3 and a condensation box 1, and setting the cyclone separator 2 to have a structure including a cyclone separation cylinder, a first return pipe, a gas spiral guide member 8, a rectifying guide vane 9, and a silica gel guide and cleaning member 10, the gas spiral guide member 8 can spirally guide the furfural gas residue entering the cyclone separation cylinder, causing the furfural gas residue to flow spirally downward. When the furfural gas in the furfural gas residue reaches the lower end, it flows upward through the first return pipe, while the furfural residue in the furfural gas residue flows downward along the wall of the cyclone separation cylinder to the recovery cylinder 6 under the action of centrifugal gravity. The centrifugal gravity of the cyclone separator 2 can remove most of the larger particle furfural residues in the furfural gas residue, completing the primary separation of the furfural gas residue; The spray separator 3 is set to have a structure including a spray separation cylinder 301, a spray pipe 312, an inner rotating cylinder 303, a suspension wire 304 and a suspension bead 305. The spraying of the spray pipe 312 inside the inner rotating cylinder 303 causes the furfural residues in the furfural gas residue to become heavier when adhering to the liquid and thus settle downward. At the same time, the rotation of the inner rotating cylinder 303 and the agitation of the rotary blades 311 on the spray pipe 312 cause the furfural gas residue, under the multiple interactions of centrifugal force and the entrainment of the spray liquid, to make the furfural residues in the furfural gas residue pass through the discharge port of the inner rotating cylinder 303 and sink to the bottom of the spray separation cylinder 301, while the furfural gas can flow upward through the second return pipe and the air outlet 308 to the upper part of the spray separation cylinder 301. Even smaller particle furfural residues can be well removed, with a better separation effect, completing the secondary separation of the furfural gas residue and greatly improving the separation effect; in addition, during the spray separation of the furfural gas residue, the spray liquid can simultaneously wash the inner wall of the inner rotating cylinder 303, reducing the adhesion of furfural residues on the inner wall of the inner rotating cylinder 303, with good technical effects; By providing the suspension wire 304 and the suspension bead 305 above the spray separation cylinder 301 and below the inner rotating cylinder 303, the suspension wire 304 and the suspension bead 305, on the one hand, form a filtering barrier that can filter the furfural residues and the entrained spray liquid in the furfural gas residue, and on the other hand, driven by the rotation of the inner rotating cylinder 303, they continuously vibrate, forming a vibrator and a turbulator that can vibrate and turbulently flow the furfural residues and the filtered liquid in the furfural gas residue, so as to shake off and sink the remaining furfural residues and spray liquid in the furfural gas residue, thus completing the tertiary separation of the furfural gas residue.

[0045] In short, through multiple forms of multi-stage separation of centrifugal gravity, centrifugal spraying, and shaking filtration on the furfural gas residue, advancing layer by layer, the separation effect of the furfural gas residue is improved, and the purity of the furfural gas is increased; in addition, during the spray separation process, the furfural gas residue can be pre-cooled simultaneously, reducing the temperature of the furfural gas entering the condensation box 1, thereby reducing the condensation temperature difference and improving the condensation efficiency. Without the need to additionally set components, the separation and pre-cooling of the furfural gas residue can be synchronously completed, with a compact and simple structure and good effects.

[0046] In addition, the secondary separation and the tertiary separation of the furfural gas residue can cooperate and coordinate with each other. The secondary separation is carried out inside the inner rotating cylinder 303, and the tertiary separation is carried out outside the inner rotating cylinder 303. The rotation of the inner rotating cylinder 303 drives the flow and disturbance of the furfural gas residue inside and outside at the same time. Moreover, the rotation of the inner rotating cylinder 303 can drive the suspension line 304 and the suspension bead 305 to vibrate, so as to assist the tertiary separation of the furfural gas residue by the suspension line 304 and the suspension bead 305. The secondary and tertiary separations coordinate with each other, with a compact structure and reduced power source. In addition, when the suspension line 304 and the suspension bead 305 on the inner rotating cylinder 303 rotate, the bottom of the suspension line 304 and the suspension bead 305 swings outwards and contacts the inner wall of the spray separation cylinder 301, thereby scraping off the furfural residue adhering to the inner wall of the furfural separation cylinder. The setting of one component plays multiple roles, and the technical effect is good.

[0047] In addition, a bowl-shaped silica gel diversion and cleaning member 10 is arranged below the rectifying guide vane 9. The silica gel diversion and cleaning member 10 is connected to a driving member 4 that drives it to move up and down, horizontally and rotate. The setting of the silica gel diversion and cleaning member 10 can, firstly, block the downward flowing furfural gas to a certain extent, reduce the continuous downward flow of the furfural gas into the furfural residue below, and facilitate the upward reflux of the furfural gas; secondly, for a small amount of furfural gas flowing to the lower part of the silica gel diversion and cleaning member 10, during the upward rising process, it can block the furfural residue in the furfural gas residue from rising, so that the furfural residue is blocked and descends under the action of gravity, reducing the upward back-carrying of the furfural residue; thirdly, after the separation of the furfural gas residue is completed, the silica gel diversion and cleaning member 10 can be moved to one side and run upwards to between the first return pipe and the cyclone separator, and then continuously move the silica gel diversion and cleaning member 10 up and down and rotate the silica gel diversion and cleaning member 10, so as to complete the cleaning of the inner wall of the cyclone separator and the outer wall of the first return pipe, reducing the adhesion of the furfural residue. In addition, when the silica gel diversion and cleaning member 10 moves upwards to between the first return pipe and the cyclone separator, it will turn downwards into an umbrella shape under the block of the first return pipe, facilitating the shaking off of the furfural residue on the silica gel diversion and cleaning member 10. The setting of one component plays different roles in different states, with a compact structure and strong functionality.

[0048] A separation method for separating gas and residue using a furfural gas residue separation device includes the following steps: (1) Primary separation: The furfural gas residue is guided into the cyclone separator from the upper end of the cyclone separator through the gas spiral guide member 8. The furfural gas residue entering the cyclone separator runs spirally downwards. The furfural residue in the furfural gas residue is thrown onto the inner wall of the cyclone separator under the action of centrifugal force and flows downwards into the recovery cylinder 6 under the action of gravity. The furfural gas from which part of the furfural residue has been removed flows through the rectifying guide vane and flows into the first gas pipe 11, completing the primary separation of the furfural gas residue; (2)Secondary separation and temperature reduction: Rotate to open the inner rotating cylinder 303 and the spray pipe 312. The furfural gas residue in the first gas pipe 11 enters the inner rotating cylinder 303 through the connecting pipe 307. The second return pipe rotates with the inner rotating cylinder 303 and agitates the furfural gas residue entering the inner rotating cylinder 303. During the agitation, the furfural residue in the furfural gas residue falls downward from the discharge port to the bottom inside the spray separation cylinder 301 under the combined action of centrifugal force, spray scouring, and gravity. A part of the furfural gas in the furfural gas residue enters the upper end of the inner rotating cylinder 303 upward through the second return pipe, a part flows out to the outside of the inner rotating cylinder 303 from the air outlet 308, and another part flows downward from the discharge port and then turns upward in a folded manner, completing the secondary separation and temperature reduction of the furfural gas residue; (3)Tertiary separation: During the rotation of the inner rotating cylinder 303, the suspension line 304 and the suspension bead 305 are toggled or swung. The remaining furfural residue and the entrained spray liquid in the furfural gas entering the suspension line 304 flow downward under the blocking filtration, turbulent flow jitter, and gravity of the suspension line 304, completing the tertiary separation of the furfural gas residue. The separated furfural gas enters the second gas pipe 5; (4)Condensation of furfural gas: The furfural gas enters the condensation box 1 for condensation and recovery; (5)Cleaning of the inner wall of the cyclone separation cylinder: After all the separation work of the furfural gas residue is completed, move the center of the silica gel diversion cleaning part 10 to the lower position between the inner wall of the cyclone separation cylinder and the outer wall of the first return pipe to one side, and move the silica gel diversion cleaning part 10 upward so that the silica gel diversion cleaning part 10 moves upward between the inner wall of the cyclone separation cylinder and the outer wall of the first return pipe. Move the silica gel diversion cleaning part 10 up and down and rotate the silica gel diversion cleaning part 10. The silica gel diversion cleaning part 10 cleans the inner wall of the cyclone separation cylinder, the outer wall of the first return pipe, and the outside of the flow rectifying guide vane 9.

[0049] Through a separation method of separating gas residue using a furfural gas residue separation device, the cyclone centrifugal primary separation, spray centrifugal secondary separation, and filtration jitter tertiary separation of furfural gas residue can be achieved, improving the separation effect of furfural gas residue; in addition, during the secondary separation process, the furfural gas can be pre-cooled simultaneously, thereby reducing the condensation temperature difference, improving the condensation efficiency, reducing the operation steps, and without the need to additionally set components, the separation and pre-temperature reduction of furfural gas residue can be completed synchronously, with a compact and simple structure and good effects. In addition, during the tertiary separation process, the spray liquid and the remaining furfural residue carried out during the secondary separation in the furfural gas can be removed simultaneously, simplifying the operation steps and improving the separation effect.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. It should be understood that the specific embodiments described herein are only for understanding the present invention and are not used to limit the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Claims

1. A furfural gas residue separation device, comprising a condensation box, characterized in that: It also includes a cyclone separator and a spray separator. The cyclone separator is connected to the spray separator through a first air pipe, and the spray separator is connected to the condensation box through a second air pipe. The cyclone separator includes a cyclone separation cylinder. A recovery cylinder is provided at the bottom end of the cyclone separation cylinder. A first return air pipe is provided in the center of the upper end inside the cyclone separation cylinder. The upper end of the first return air pipe extends out of the furfural inlet pipe and is connected to the first air pipe. The top end of the cyclone separation cylinder is connected to the furfural inlet pipe. A gas spiral guide member is provided between the upper end inside the cyclone separation cylinder and the outer wall of the first return air pipe. A rectifying guide vane is provided at the lower end inside the first return air pipe. A bowl-shaped silica gel guide and cleaning member is provided at the lower end of the rectifying guide vane inside the cyclone separation cylinder. The silica gel guide and cleaning member is connected to a driving member that drives its up and down movement, horizontal movement, and rotation. The silica gel guide and cleaning member is used to guide the furfural gas towards the first return air pipe, and at the same time block it to reduce the return of the furfural residue below into the first return air pipe, and the silica gel guide and cleaning member can extend into the space between the cyclone separation cylinder and the first return air pipe to clean the furfural residue on the inner wall of the cyclone separation cylinder. The spray separator includes a spray separation cylinder. A filter screen is provided near the lower end inside the spray separation cylinder. An inner rotating cylinder is rotatably provided near the upper end inside the spray separation cylinder. A plurality of suspension lines are provided at the upper end inside the spray separation cylinder and the lower end of the inner rotating cylinder. A plurality of suspension beads are provided on each suspension line. A plurality of convex feet that can contact the suspension lines above the spray separation cylinder are fixed at the upper end of the inner rotating cylinder. A connecting pipe connected to the first air pipe is provided at the top end of the inner rotating cylinder. An air outlet is provided near the upper end on the outer side of the inner rotating cylinder. A blanking port is provided at the bottom end of the inner rotating cylinder. A second return air pipe is provided in the center inside the inner rotating cylinder. The upper end of the second return air pipe extends out of the inner rotating cylinder. A plurality of rotating blades are provided on the second return air pipe. A spray pipe is provided on one side of the second return air pipe. Sprayers are provided on the spray pipe inside the inner rotating cylinder. The lower end of the spray pipe extends out of the inner rotating cylinder and extends below the filter screen.

2. The furfural gas residue separation device according to claim 1, wherein: The gas spiral guide member includes a sleeve ring. The sleeve ring is fixed on the first return pipe. A plurality of arc-shaped guide plates that are twisted and inclined towards the counterclockwise direction are fixed on the outer side of the sleeve ring. The outer side of the guide plate is fixed on the cyclone separation cylinder.

3. The furfural gas residue separation device according to claim 1, wherein: The lower end of the rectifying guide vane extends out of the first return pipe. The rectifying guide vane includes a plurality of wing plates. The wing plates are arc-shaped. The middle parts of the plurality of wing plates are fixedly connected together, and the lower ends of the wing plates are twisted towards the clockwise direction.

4. A furfural gas residue separation device according to claim 1, characterized in that: The cyclone separation cylinder includes a cylindrical cylinder at the upper end and a conical cylinder at the lower end. The lower end of the conical cylinder is connected to the recovery cylinder. The diameter of the recovery cylinder is larger than the diameter of the bottom port of the conical cylinder. The upper end of the cylindrical cylinder is connected to the furfural inlet pipe through a butt flange.

5. A furfural gas residue separation device according to claim 1, characterized in that: The driving member includes a sliding rod, a telescopic rod, a slider, a fixed rod, and a first motor. The sliding rod is rotatably provided on the cyclone separation cylinder. The fixed rod is fixed inside the cyclone separation cylinder and is located below the sliding rod. The first motor is provided in the middle of the fixed rod. The output shaft of the first motor is connected to the sliding rod. The lower end of the silica gel guide and cleaning member is provided with a telescopic rod. The bottom end of the telescopic rod is provided with a slider. The slider is slidably provided on the sliding rod, and one side of the slider is connected to an electric push rod that drives its sliding.

6. A furfural gas residue separation device according to claim 1, characterized in that: The inner rotating cylinder includes an upper rotating cover and a lower rotating cylinder. The upper rotating cover is of an arc-shaped structure, and the lower rotating cylinder is a conical cylinder. The lower end of the upper rotating cover bends inward and extends into the lower rotating cylinder. There is an air outlet between the upper rotating cover and the lower rotating cylinder, and the upper rotating cover and the lower rotating cylinder are connected by connecting ribs. The outer side of the lower rotating cylinder is rotatably connected to the spray separation cylinder.

7. The furfural gas residue separation device according to claim 6, characterized in that: The connecting pipe extends into the inner rotating cylinder and is fixedly connected to the inner rotating cylinder. The upper end of the connecting pipe extends out of the spray separation cylinder and is rotatably connected to the spray separation cylinder. The upper end of the connecting pipe is rotatably connected to the first air pipe.

8. A furfural gas residue separation device according to claim 7, characterized in that: A first gear is fixed on the connecting pipe, and a second gear is rotatably arranged at the upper end of the spray separation cylinder. The first gear and the second gear are meshed and connected, and the second gear is connected to a second motor that drives it to rotate.

9. The furfural gas residue separation device according to claim 8, wherein: Agitating blades are provided above the filter screen at the lower end of the spray pipe.

10. A separation method for gas-slag separation using a furfural gas-slag separation device as described in claim 1: characterized in that: It includes the following steps: (1) Primary separation: The furfural gas residue is guided into the cyclone separation cylinder from the upper end of the cyclone separation cylinder through the gas spiral guide. The furfural gas residue entering the cyclone separation cylinder runs spirally downward. The furfural residue in the furfural gas residue is thrown onto the inner wall of the cyclone separation cylinder under the action of centrifugal force and flows downward under the action of gravity into the recovery cylinder, while the furfural gas with part of the furfural residue removed flows into the first air pipe through the rectification of the sorting guide wing, completing the primary separation of the furfural gas residue. (2) Secondary separation and temperature reduction: Rotate and open the inner rotating cylinder and the spray pipe. The furfural gas residue in the first air pipe enters the inner rotating cylinder through the connecting pipe. The second return pipe rotates with the inner rotating cylinder and agitates the furfural gas residue entering the inner rotating cylinder. During the agitation process, the furfural residue in the furfural gas residue falls downward from the discharge port to the bottom of the spray separation cylinder under the combined action of centrifugal force, spray scouring, and gravity. Part of the furfural gas in the furfural gas residue enters the upper end of the inner rotating cylinder upward through the second return pipe, part flows out to the outside of the inner rotating cylinder through the air outlet, and part flows downward through the discharge port and then turns upward, completing the secondary separation and temperature reduction of the furfural gas residue. (3) Tertiary separation: During the rotation of the inner rotating cylinder, the suspension line and the hanging beads are toggled or swung. The remaining furfural residue and the carried spray liquid in the furfural gas entering the suspension line flow downward under the blocking filtration, turbulent flow jitter, and gravity of the suspension line, completing the tertiary separation of the furfural gas residue. The separated furfural gas enters the second air pipe. (4) Condensation of furfural gas: The furfural gas enters the condensation box for condensation recovery. (5) Cleaning of the inner wall of the cyclone separation cylinder: After all the separation work of the furfural gas residue is completed, move the center of the silica gel diversion cleaning part to the lower position between the inner wall of the cyclone separation cylinder and the outer wall of the first return pipe to one side, move the silica gel diversion cleaning part upward so that the silica gel diversion cleaning part moves upward between the inner wall of the cyclone separation cylinder and the outer wall of the first return pipe, move the silica gel diversion cleaning part up and down, and rotate the silica gel diversion cleaning part. The silica gel diversion cleaning part cleans the inner wall of the cyclone separation cylinder, the outer wall of the first return pipe, and the outer side of the rectification guide wing.

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