Steam stripping system for treating high-viscosity materials and control method thereof

Abstract

The invention discloses a steam stripping system for treating high-viscosity materials and a control method thereof, the steam stripping system comprises a steam stripping tower and a reaction kettle, the steam stripping tower is internally provided with a plurality of mutually parallel tower plates at intervals along the axial direction, the peripheral side wall of the steam stripping tower is symmetrically provided with two feed ports, and the feed ports extend towards the inside of the steam stripping tower to positions above the tower plates; the inlet end of the feeding pipe is connected with the reaction kettle, the outlet end of the feeding pipe is divided into two branch pipes, and the branch pipes respectively extend towards the left side and the right side of the stripping tower and are connected with the feeding hole. According to the invention, the two feed ports are symmetrically arranged above the tower plate of the stripping tower, so that materials directly fall on the tower plate after entering the stripping tower, the speed of the materials flowing downwards from the tower plate is increased, and meanwhile, the feeding pipe supplies the materials to the stripping tower through the two branch pipes, so that the cross sectional area of the feeding pipe is reduced, the materials are shunted in the feeding pipe, and the stripping efficiency is improved. The conveying pipe can be prevented from being blocked by the materials due to high viscosity, and the speed of supplying the materials to the stripping tower is increased.

Description

Technical Field

[0001] The present invention belongs to the technical field of chemical equipment, and in particular relates to a stripping system for processing high-viscosity materials and a control method thereof. Background Art

[0002] The stripping tower is a stripping and separation device widely used in the petrochemical field in the existing technology. The traditional stripping tower is mainly composed of a tower body, a process pipe mouth and a multi-layer tower plate that meets the process operation requirements. There are many unfavorable factors such as the stripping tower structure is monomeric, the operation system process pipeline is complex, the stripping tower occupies a large space area, and the processing rate of high-viscosity materials is low.

[0003] Chinese utility model application number 202222782082.2 discloses an efficient feeding device for a stripping tower, comprising a stripping tower body, wherein a feeding device is arranged inside the stripping tower body, and the feeding device comprises a feed pipe, a conveying pump, a cylinder, a pressure plate and a nozzle. The conveying pump conveys the material in the feed pipe, and the cylinder controls the pressure plate to squeeze the material.

[0004] This efficient stripping tower feeding device feeds raw materials into a feed pipe. A cylinder drives a pressure plate up and down, squeezing the raw materials in the feed pipe and causing them to be released from a nozzle. While pressurizing the feed pipe can increase the material feed rate, this solution cannot handle high-viscosity materials at the speed the stripping tower can handle. Furthermore, the device's complex structure and poor integration with the feed pipe make it difficult to clean.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The object of the present invention is to provide a stripping system for processing high-viscosity materials, so as to simplify the feeding pipeline structure and increase the material conveying speed, thereby enhancing the respective functions of the stripping tower and the feeding pipe.

[0007] Another object of the present invention is to provide a control method for the above-mentioned stripping system to achieve coordinated control of various functional structures in the stripping system and achieve the purpose of improving material processing efficiency.

[0008] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0009] A stripping system for processing high-viscosity materials includes a stripping tower and a reactor. The stripping tower is provided with a plurality of mutually parallel trays spaced axially inside. Two feed ports are symmetrically provided on the outer peripheral side wall of the stripping tower. The feed ports extend into the stripping tower to above the trays.

[0010] It also includes a feed pipe with an inlet end connected to the reactor and an outlet end split into two branch pipes, and the branch pipes extend to the left and right sides of the stripping tower and are connected to the feed port.

[0011] Furthermore, several rows of tray holes are provided on the tray, and the tray holes in two adjacent rows are staggered with each other, and a plurality of the feed pipes are arranged around the stripping tower and distributed in order from the inside to the outside.

[0012] Furthermore, the center lines connecting any three adjacent tray holes in different rows form an isosceles triangle, and the number of the feeding pipes is positively correlated with the aperture size of the tray holes.

[0013] Furthermore, the branch pipe includes a first feed pipe and a second feed pipe, the branch pipe of the first feed pipe is close to and surrounds the stripping tower, and the branch pipe of the second feed pipe is located outside the branch pipe of the first feed pipe and is connected to the branch pipe of the first feed pipe at the feed port.

[0014] Furthermore, the branch pipe further includes a third feeding pipe, which is located outside the branch pipe of the second feeding pipe and is connected to the branch pipe of the second feeding pipe at the feed port.

[0015] Furthermore, the cross-sectional area of ​​the branch pipe of the first feeding pipe is larger than the cross-sectional area of ​​the branch pipe of the second feeding pipe and the cross-sectional area of ​​the branch pipe of the third feeding pipe.

[0016] Furthermore, the branch pipe of the second feeding pipe is provided with a one-way valve near the position where it is connected to the branch pipe of the first feeding pipe, and the branch pipe of the third feeding pipe is provided with a one-way valve near the position where it is connected to the branch pipe of the second feeding pipe.

[0017] Furthermore, a plurality of the feeding pipes are connected to one reactor, or a plurality of the feeding pipes are connected to a plurality of reactors one-to-one.

[0018] The present invention also provides a control method using the above-mentioned stripping system. The stripping system further includes: an on-off valve, which is arranged in series in the feed pipe; a controller, which is electrically connected to the on-off valve and is used to control the connection state of the feed pipe;

[0019] The feed pipe can be opened according to the processing speed of the material in the stripping tower so that the feed speed matches the processing speed.

[0020] Furthermore, the on-off valve is a four-way valve and is arranged in the branch pipe of the first feeding pipe. The branch pipe of the second feeding pipe and the branch pipe of the third feeding pipe are connected to the four-way valve, and each pipeline can be adjusted for feeding by controlling the four-way valve.

[0021] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0022] 1. The two feed ports are symmetrically arranged above the tray of the stripping tower, so that the material falls directly on the tray after entering the stripping tower, which increases the speed of the material flowing downward from the tray. At the same time, the feed pipe supplies the material to the stripping tower through two branch pipes, which reduces the cross-sectional area of ​​the feed pipe and diverts the material in the feed pipe. This can prevent the material from being blocked in the delivery pipe due to high viscosity and increase the speed of supplying the material to the stripping tower.

[0023] 2. By optimizing the arrangement of the tray holes, materials can pass through the trays more quickly, reducing the time they stay on the trays and slowing the buildup of top-layer sludge and crusting. This not only increases the speed and efficiency of the stripper in processing high-viscosity materials but also extends the stripper's cleaning cycle. Simultaneously, the layout and structure of the feed pipes on the stripper's exterior have been modified to allow multiple feed pipes to simultaneously deliver material to the stripper. This, in conjunction with the optimized trays, comprehensively improves the stripper's operating efficiency.

[0024] 3. The branches distributed on the outside are directly connected to the branches on the inside in order from the outside to the inside, avoiding the need to add a feed port on the main body of the stripping tower. This not only ensures the structural integrity of the stripping tower but also reduces the difficulty of optimizing and transforming the stripping system. It can also form a well-defined structure for the branches of the feed pipe, reducing the labor cost of maintaining the stripping system.

[0025] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0027] Figure 1 is a schematic diagram of a stripping system for processing high-viscosity materials according to the present invention;

[0028] Figure 2 It is a schematic diagram of the distribution of tray holes on a stripping tray of the present invention.

[0029] Among them: 1. stripping tower; 2. reactor; 11. feed port; 3. feed pipe; 31. first feed pipe; 32. second feed pipe; 33. third feed pipe.

[0030] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "in contact," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0034] In the present invention, the stripping system includes a stripping tower and a reactor. The stripping tower is provided with a plurality of parallel trays. Furthermore, the trays are spaced apart along the axial axis of the stripping tower. A steam inlet is provided at the bottom of the stripping tower for supplying high-temperature steam into the stripping tower.

[0035] For example, the stripping tower has 16 trays spaced apart along its height. The stripping tower is generally cylindrical in shape. Two feed ports are provided on the outer sidewall of the stripping tower for supplying high-viscosity materials. The high-viscosity materials include at least polyacrylonitrile.

[0036] In addition, two feed ports are symmetrically located at the upper ends of the stripping tower's outer sidewalls. The feed port channels extend radially through the stripping tower's sidewalls. Furthermore, the feed ports extend all the way above the stripping tower trays, allowing material to be delivered directly to the trays.

[0037] The stripping tower has a steam inlet at the bottom, located below the lowest tray. After entering the stripping tower, the material passes through each tray in turn under the action of gravity, while being blocked by each tray and remaining on the tray for a certain period of time.

[0038] After entering, the steam passes through each layer of the tower plate in turn and reaches the top of the stripping tower. During this period, it exchanges heat with the materials on each layer of the tower plate and takes away small molecules, thereby separating the heavy and light components in the material.

[0039] The present invention is further described in detail below with reference to specific embodiments.

[0040] In one embodiment, a feeding pipe disposed between a stripping column and a reactor is introduced.

[0041] like Figure 1 As shown, the inlet end of the feeding pipe is connected to the reactor, and the outlet end of the feeding pipe is split into two branches.

[0042] The two branch pipes extend separately and are connected to the feed ports on opposite sides of the stripping tower, that is, the two branch pipes are connected to the feed ports from the left and right sides of the stripping tower, respectively.

[0043] In this embodiment, two feed ports are symmetrically arranged above the tower plate of the stripping tower, so that the material falls directly on the tower plate after entering the stripping tower, thereby increasing the speed of the material flowing downward from the tower plate. At the same time, the feed pipe supplies the material to the stripping tower through two branch pipes, reducing the cross-sectional area of ​​the feed pipe and diverting the material in the feed pipe. This can prevent the material from being blocked in the delivery pipe due to high viscosity, thereby increasing the speed of supplying the material to the stripping tower.

[0044] In another embodiment, a tray installed in a stripping tower is described. In this embodiment, the tray is generally circular. However, those skilled in the art will readily appreciate that the shape of the tray is designed based on the actual requirements of the stripping tower and the stripping process. This embodiment uses a circular shape as an example and does not limit the technical solutions of the present invention.

[0045] Specifically, the trays are provided with rows of tray holes, with the tray holes in adjacent rows staggered to increase the speed at which the stripper processes material. To ensure that the feed pipe's conveying speed meets the stripper's processing speed, several feed pipes are installed outside the stripper, surrounding the stripper.

[0046] In addition, a plurality of feed pipes are distributed on the periphery of the stripping tower in order from the inside to the outside.

[0047] To meet different usage requirements, the line connecting the tray holes around the edge of the tray hole distribution is used as the boundary of the tray hole distribution area. The tray hole distribution area can be circular, polygonal, or other random shapes.

[0048] Alternatively, the tray holes may form two or more distribution areas with intervals on the tray surface, and the shapes and sizes of the multiple distribution areas may be the same or different.

[0049] For example, the surface of the tray has a plurality of rectangular distribution areas, the sizes of the plurality of rectangular distribution areas may be the same or different, and the plurality of rectangular distribution areas may be parallel to each other or have a certain angle between each other.

[0050] Alternatively, a plurality of coaxially arranged annular distribution areas are formed on the surface of the tower plate, with gaps between adjacent distribution areas; no matter how the distribution areas of the tower plate holes are arranged, the three tower plate holes closest to each other in each distribution area are located at the vertices of an isosceles triangle with only two sides of equal length.

[0051] Specifically, the center lines connecting any three adjacent tray holes in different rows on the tray form an isosceles triangle. In addition, the diameter of the tray holes is positively correlated with the number of feed pipes distributed around the periphery of the stripping tower.

[0052] This example uses a circular tower with a hexagonal tray aperture pattern as an example. The trays are provided with 1,803 tray apertures. These 1,803 tray apertures are arranged in multiple parallel rows. The tray apertures at both ends of each row are connected in sequence to define a hexagonal tray aperture pattern. The tray apertures within each row are evenly spaced, and the spacing between adjacent tray apertures in different rows is consistent. The tray apertures in adjacent rows are staggered so that the three closest tray apertures on the tray are located at the vertices of an isosceles triangle with only two sides of equal length.

[0053] like Figure 2 As shown, the length of the base of the isosceles triangle is 23 mm, and the length of the waist is 21.3 mm; the centers of the tower plate holes are respectively located at the vertices of the isosceles triangle, and the tower plate holes are set as circular through holes with a diameter of 13 mm.

[0054] Since the light components in the material are prone to self-aggregation and produce sludge, the formation of scabbing affects the normal progress of steam stripping.

[0055] In this embodiment, by optimizing the arrangement of the tray holes, materials can pass through the trays more quickly, reducing the time they remain on the trays. This, in turn, reduces the rate of sludge and scab formation on the top layer. This not only improves the speed and efficiency of the stripper in processing high-viscosity materials, but also extends the stripper's cleaning cycle. Simultaneously, the layout and structure of the feed pipes on the stripper's exterior have been modified accordingly, enabling multiple feed pipes to simultaneously deliver materials to the stripper. This, in conjunction with the optimized trays, comprehensively improves the stripper's operating efficiency.

[0056] In another embodiment, a feeding pipe capable of increasing material conveying speed is introduced.

[0057] Specifically, the feed pipe includes an inlet end connected to the reactor and an outlet end connected to the stripping tower. The outlet end is decomposed on the outer peripheral side of the stripping tower to form two branch pipes.

[0058] The two branch pipes extend to the left and right sides of the stripping tower respectively and are connected to the feed inlets on both sides in a one-to-one correspondence.

[0059] In particular, a plurality of feed pipes are distributed on the periphery of the stripping tower. The outlet end of each feed pipe is split into two branch pipes on the periphery of the stripping tower.

[0060] Furthermore, corresponding to the order of the feed pipes from inside to outside, the branch pipes include a first feed pipe branch pipe and a second feed pipe branch pipe. The first feed pipe branch pipe is close to and surrounds the stripping tower, and the second feed pipe branch pipe is located outside the first feed pipe branch pipe and is connected to the first feed pipe branch pipe at the feed inlet.

[0061] Similarly, the branch pipes of the feeding pipe further include a branch pipe of a third feeding pipe. The branch pipe of the third feeding pipe is located outside the branch pipe of the second feeding pipe and is communicated with the branch pipe of the second feeding pipe at the feeding port.

[0062] In this embodiment, the branch pipes distributed on the outside are directly connected to the branch pipes on the inside in order from the outside to the inside, avoiding the need to add a feed port to the main body of the stripping tower. This ensures the structural integrity of the stripping tower and reduces the difficulty of optimizing and modifying the stripping system. It also enables the various branch pipes of the feed pipe to form a clearly layered structure, reducing the labor cost of maintaining the stripping system.

[0063] In another embodiment, a feed pipe is provided that can simultaneously feed material to a stripping column through multiple branches. Specifically, the cross-sectional area of ​​a branch of the first feed pipe is larger than the cross-sectional area of ​​a branch of the second feed pipe. The cross-sectional area of ​​the branch of the second feed pipe is larger than the cross-sectional area of ​​the branch of the third feed pipe.

[0064] Preferably, the cross-sectional area of ​​the branch of the first feeding pipe is larger than the sum of the cross-sectional areas of the branch of the second feeding pipe and the branch of the third feeding pipe, so that the branch of the first feeding pipe can meet the conveying speed when all branches are conveyed in saturation mode at the same time.

[0065] In another embodiment, a feed pipe is provided that prevents material backflow. Specifically, a branch pipe of the second feed pipe is provided with a one-way valve near the connection with the branch pipe of the first feed pipe, thereby preventing material in the branch pipe of the first feed pipe from entering the second pipe. A branch pipe of the third feed pipe is provided with a one-way valve near the connection with the branch pipe of the second feed pipe, thereby preventing material in the branch pipe of the second feed pipe from entering the third pipe.

[0066] Furthermore, a spray assembly for spraying desalted water into the stripping tower is provided in the stripping tower. The spray assembly is located in the stripping tower and is movably arranged above the top tower plate relative to the stripping tower so that the spray range of the spray assembly covers the surface of the top tower plate.

[0067] During actual use, the spray assembly evenly sprays the desalted water onto the surface of the top tray. Since the temperature of the desalted water is relatively low, the evenly sprayed desalted water can be more evenly mixed with the material entering the stripping tower, so that the material temperature can be evenly reduced.

[0068] Lowering the material temperature can inhibit the occurrence of small molecule self-aggregation. As the material temperature decreases, the temperature of the desalted water increases, which improves the fluidity of the material after mixing with the material, further reducing the time the material stays on the tray.

[0069] In another embodiment, a plurality of feeding pipes are connected to one reactor. Alternatively, a plurality of feeding pipes are connected to a plurality of reactors one-to-one.

[0070] In addition, the spraying component includes a nozzle arranged in the stripping tower for spraying desalted water.

[0071] The nozzle is movably disposed relative to the stripping tower. For example, the nozzle itself can be movable along the radial or height direction of the stripping tower, or the nozzle can be rotatably disposed relative to the stripping tower. To achieve radial or height movement of the nozzle along the stripping tower, a corresponding drive assembly for driving the nozzle movement is necessary. This results in a more complex structure within the stripping tower and may affect steam discharge. A nozzle rotatable relative to the stripping tower is more convenient to implement, so this embodiment uses a nozzle rotatable relative to the stripping tower as an example for further explanation.

[0072] Specifically, the nozzle has a fixed installation position in the stripping tower and can be rotatable relative to the installation position. The installation position can be on the inner wall of the stripping tower, or the installation position can be located on a mounting seat fixed relative to the stripping tower for fixing the nozzle. The nozzle can be a spherical porous nozzle or other conventional nozzles that can generate a uniform spray surface during rotation.

[0073] The present invention also provides a control method using the above-mentioned stripping system. The stripping system further comprises: an on-off valve arranged in series in the feed pipe; and a controller electrically connected to the on-off valve for controlling the connection state of the feed pipe.

[0074] In addition, the stripping tower is provided with a sensor for detecting the material processing speed and a sensor for detecting the material temperature at the top tray of the stripping tower.

[0075] Thus, the stripping system can control the opening of the feed pipe according to the processing speed of the material in the stripping tower so that the feeding speed matches the processing speed.

[0076] The stripping system can also control the material temperature to be uniform and stable by adjusting the spray cycle or spray intensity of the spray component during the stripping process. The control method is as follows:

[0077] The sensor is connected to the stripper's controller. The controller is connected to the stripper's spray assembly. The sensor acquires the material temperature and sends it to the controller. The controller adjusts the spray cycle or spray intensity of the spray assembly based on the material temperature. This controls the material temperature by adjusting the spray cycle or spray intensity to keep it slightly below the boiling point of the heavy components in the material.

[0078] The control of the material temperature in the above scheme is actually to control the temperature of the mixture after the material and desalted water are mixed. If the temperature of the mixture is too high, the occurrence of small molecule self-aggregation cannot be effectively suppressed, resulting in a reduced inhibitory effect on scarring; if the temperature of the mixture is too low, it may cause the viscosity of the material to increase, and the speed at which the material passes through the top tray to decrease. At the same time, the amount of steam consumed in the stripping process increases, which increases the stripping cost. Usually, in order to avoid the temperature of the desalted water being too low, the desalted water needs to be preheated. However, the present invention does not require preheating, thereby reducing the steam consumption in the stripping process.

[0079] In particular, the material temperature can be obtained by directly detecting the temperature of the material at the topmost tray, or by separately detecting the temperature of the material at the three trays at the top of the stripping tower, and taking the average temperature of the three trays as the material temperature.

[0080] After adopting the scheme described in this embodiment, the cleaning cycle of the stripping tower is greatly extended. By controlling the amount of desalted water sprayed, the PAN material entering the stripping tower at a temperature of 101°C is cooled to 75°C, and the desalted water mixed with the material is heated from 35°C to 75°C, reducing the steam consumption required for heating the desalted water by approximately 1.2 t / h.

[0081] In another embodiment, a method for simultaneously controlling multiple branch pipes to transport materials is provided.

[0082] Specifically, the on-off valve is a four-way valve connected in series to the branch of the first feed pipe. The branches of the second and third feed pipes are also connected to the four-way valve. This allows the on-off state of the branches of the second and third feed pipes relative to the branch of the first feed pipe to be adjusted by controlling the four-way valve, thereby controlling the feed rate from the reactor to the stripping column.

[0083] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the present invention can make slight changes or modifications to equivalent embodiments using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A stripping system for processing high-viscosity materials, comprising a stripping tower (1) and a reactor (2), wherein a plurality of mutually parallel trays are arranged in the stripping tower (1) at intervals along the axial direction, characterized in that: Two feed inlets (11) are symmetrically provided on the outer peripheral side wall of the stripping tower (1), and the feed inlets (11) extend into the stripping tower (1) to above the tower plate; It also includes a feed pipe (3) whose inlet end is connected to the reactor (2) and whose outlet end is split into two branches, the branches respectively extending to the left and right sides of the stripping tower (1) and connected to the feed port (11).

2. A stripping system for processing high-viscosity materials according to claim 1, characterized in that: Several rows of tray holes are provided on the tray, and the tray holes in two adjacent rows are staggered with each other. A plurality of feed pipes (3) are arranged around the stripping tower (1) and are distributed in order from the inside to the outside.

3. A stripping system for processing high-viscosity materials according to claim 1 or 2, characterized in that: The center lines connecting any three adjacent different rows of the tray holes form an isosceles triangle, and the number of the feed pipes (3) is positively correlated with the aperture size of the tray holes.

4. A stripping system for processing high-viscosity materials according to claim 3, characterized in that: The feed pipe (3) includes a first feed pipe (31) and a second feed pipe (32), wherein the branch of the first feed pipe (31) is close to and surrounds the stripping tower (1), and the branch of the second feed pipe (32) is located outside the branch of the first feed pipe (31) and is connected to the branch of the first feed pipe (31) at the feed port (11).

5. A stripping system for processing high-viscosity materials according to claim 4, characterized in that: The feeding pipe (3) further comprises a third feeding pipe (33), which is located outside the branch pipe of the second feeding pipe (32) and is connected to the branch pipe of the second feeding pipe (32) at the feeding port (11).

6. A stripping system for processing high-viscosity materials according to claim 5, characterized in that: The cross-sectional area of ​​the branch pipe of the first feeding pipe (31) is larger than the cross-sectional area of ​​the branch pipe of the second feeding pipe (32) and the cross-sectional area of ​​the branch pipe of the third feeding pipe (33).

7. A stripping system for processing high-viscosity materials according to claim 6, characterized in that: The branch pipe of the second feeding pipe (32) is provided with a one-way valve at a position close to the connection with the branch pipe of the first feeding pipe (31), and the branch pipe of the third feeding pipe (33) is provided with a one-way valve at a position close to the connection with the branch pipe of the second feeding pipe (32).

8. A stripping system for treating high-viscosity materials according to any one of claims 1 to 7, characterized in that: A plurality of the feeding pipes (3) are connected to one reaction kettle (2), or a plurality of the feeding pipes (3) are connected to a plurality of reaction kettles (2) one to one.

9. A control method for the stripping system according to any one of claims 1 to 8, characterized in that: The stripping system also includes: An on-off valve is arranged in series in the feeding pipe (3); A controller, electrically connected to the on-off valve, for controlling the connection state of the feeding pipe (3); The feed pipe (3) can be opened according to the processing speed of the material in the stripping tower (1) so that the feed speed matches the processing speed.

10. The control method of a stripping system according to claim 9, characterized in that: The on-off valve is a four-way valve and is arranged in the branch pipe of the first feeding pipe (31). The branch pipe of the second feeding pipe (32) and the branch pipe of the third feeding pipe (33) are connected to the four-way valve. The feeding can be adjusted in each pipeline by controlling the four-way valve.

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