A new type of rapeseed crude oil stripping desolventizing tower

Abstract

The utility model relates to rapeseed oil production technical field, concretely relates to a novel rapeseed crude oil stripping desolventization tower, tower body, is used for forming the stripping desolventization space of rapeseed crude oil to remove solvent, feed pipe, the sidewall of tower body is set up on the top of tower body near, and the rapeseed crude oil enters the tower body from the feed pipe, filling, fills in the middle part of tower body and is located below the feed pipe, is used for dispersing the rapeseed crude oil into oil film shape in the tower body, stripping desolventization subassembly, including oil collecting funnel and steam lance, the oil collecting funnel sets up in the tower body and is located below the filling, is used for collecting the rapeseed crude oil that disperses into oil film shape, the steam lance sprays steam to the rapeseed crude oil collected and separates solvent through steam, a novel rapeseed crude oil stripping desolventization tower of the utility model can enhance the contact effect of steam and rapeseed crude oil, optimizes the stripping desolventization process of rapeseed crude oil, improves desolventization efficiency, guarantees the quality of product.

Description

Technical Field

[0001] This utility model relates to the field of rapeseed oil production technology, specifically to a novel rapeseed crude oil stripping desolventizing tower. Background Technology

[0002] Rapeseed crude oil, also known as crude rapeseed oil, refers to the unrefined oil extracted from rapeseed. There are two main production processes for rapeseed crude oil: pressing and solvent extraction. Pressing uses mechanical pressure to squeeze rapeseed to extract crude oil, while solvent extraction utilizes the property of solvents to dissolve oil, efficiently extracting oil from rapeseed (or its pre-treated embryo or pre-pressed cake), ultimately yielding rapeseed crude oil containing solvent. Solvent extraction is widely used in large-scale oil mills due to its high oil yield, high degree of automation, and controllable production costs. The solvents used in solvent extraction are mostly food-grade solvents, with n-hexane as the main component. Therefore, residual solvents must be removed from rapeseed crude oil produced by solvent extraction to ensure safe subsequent processing and use, and to prevent the solvent from reacting with the unsaturated fatty acids in the oil, accelerating the oxidation and rancidity of the crude oil, shortening its shelf life, and affecting the quality of the product.

[0003] In existing technologies, stripping is often used to remove solvents from rapeseed crude oil in order to separate the solvents. This method utilizes the principle of reducing the partial pressure of the solvent with steam, allowing the residual solvent to evaporate. However, most stripping devices directly contact the steam and rapeseed crude oil in reverse. Due to structural design limitations, the contact between the steam and the oil is insufficient at different production rates, resulting in low stripping efficiency, high steam consumption per unit output, and a significant reduction in stripping efficiency. This can easily lead to uneven solvent residue and affect product quality.

[0004] Therefore, there is an urgent need for a device for stripping and desolventizing rapeseed crude oil that can enhance the contact effect between steam and rapeseed crude oil, optimize the stripping and desolventizing process of rapeseed crude oil, improve desolventizing efficiency, and ensure product quality. Utility Model Content

[0005] The present invention aims to provide a novel rapeseed crude oil stripping and desolventizing tower, which can enhance the contact effect between steam and rapeseed crude oil, optimize the stripping and desolventizing process of rapeseed crude oil, improve desolventizing efficiency, and ensure product quality.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a novel rapeseed crude oil stripping and desolventizing tower, comprising: The tower body is used to form the stripping and desolventizing space for removing solvent from rapeseed crude oil; The feed pipe is located near the top of the tower body on the side wall of the tower body, and rapeseed crude oil enters the tower body through the feed pipe; The packing material is filled in the middle of the tower body and located below the feed pipe, and is used to disperse the rapeseed crude oil entering the tower body into an oil film. A stripping and desolventizing assembly includes an oil collecting funnel and a steam nozzle. The oil collecting funnel is located in the tower body and below the packing material. It is used to collect rapeseed crude oil dispersed in an oil film. The steam nozzle sprays steam onto the collected rapeseed crude oil and separates the solvent through the steam. An exhaust port, located at the top of the tower body, is used to discharge solvent-carrying vapor from the tower body.

[0007] Furthermore, the tower body is cylindrical, and the oil collecting funnel is provided with a support rod connected to the inner wall of the tower body around its perimeter. The oil collecting funnel is suspended at the axis of the tower body by the support rod. The oil collecting funnel is provided with a C-shaped tube on the side of its bottom. One end of the C-shaped tube is connected to the bottom of the oil collecting funnel, and the other end is connected to an installation pipe facing the bottom of the oil collecting funnel.

[0008] Furthermore, the steam nozzle is L-shaped and extends into the mounting tube from the bottom. The bottom of the mounting tube is provided with a sealing plate, and the steam nozzle is provided with a nozzle located in the mounting tube. A Venturi channel is formed inside the nozzle.

[0009] Furthermore, the nozzle opening is higher than the connection point between the C-shaped tube and the mounting tube.

[0010] Furthermore, the feed pipe is L-shaped, and the short side of the L-shaped feed pipe coincides with the axis of the tower body and is vertically connected to a spray hood. The bottom of the spray hood is provided with a perforated plate.

[0011] Furthermore, the top of the packing is located below the spray hood, and the bottom of the packing is provided with an inverted frustum side cylinder. The frustum side cylinder has a large opening end face and a small opening end face. The diameter of the large opening end face is the same as the diameter of the inner wall of the tower, and the diameter of the small opening end face is smaller than the diameter of the upper port of the oil collecting funnel.

[0012] Furthermore, the tower body is provided with an arc-shaped baffle located above the feed pipe, and the arc-shaped baffle is provided with inclined bracing rods connected to the inner wall of the tower body around its top.

[0013] Furthermore, the tower body is provided with an oil outlet pipe located below the steam nozzle. The oil outlet pipe is L-shaped, with the short side of the L-shape coinciding with the axis of the tower body and the pipe opening facing downwards.

[0014] Furthermore, observation mirrors are respectively provided on the tower body opposite the oil outlet pipe and the arc-shaped baffle.

[0015] Furthermore, the tower body is provided with a suspension support for suspending the tower body, and the bottom of the tower body is provided with an exhaust port.

[0016] The beneficial effects of this scheme are as follows: Through the systematic design of setting the feed pipe close to the top of the tower, the packing material dispersing the oil in real time, the oil collection funnel collecting the oil centrally, and the steam nozzle spraying the steam in a targeted manner, the interaction path between rapeseed crude oil and steam is optimized, ensuring sufficient contact. This solves the problems of low desolventizing efficiency and uneven solvent residue. The packing material disperses the oil in real time to form a uniform oil film, and the oil collection funnel centrally processes the oil to optimize the steam contact point. This achieves efficient and uniform contact between steam and oil, effectively improving the problem of insufficient contact between steam and oil, increasing desolventizing efficiency, and ensuring the uniformity of solvent residue, thus avoiding the technical defects of low desolventizing efficiency and uneven solvent residue. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle.

[0018] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: 1. Tower body; 2. Feed pipe; 3. Packing; 4. Oil collecting funnel; 5. Steam spray pipe; 6. Exhaust port; 7. Support rod; 8. C-shaped pipe; 9. Mounting pipe; 10. Sealing plate; 11. Nozzle; 12. Venturi channel; 13. Spray hood; 14. Perforated plate; 15. Frustum side cylinder; 16. Arc-shaped baffle; 17. Diagonal support rod; 18. Oil outlet pipe; 19. Observation mirror; 20. Suspension support; 21. Drain port; 22. Pressure ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Example 1 The basic implementation examples are as follows: Figure 1-2 As shown in the attached document Figure 1 The novel rapeseed crude oil stripping and desolventizing tower shown includes: Tower body 1 is used to form a stripping and desolventizing space for removing solvent from rapeseed crude oil; the tower body 1 is cylindrical and can be made by rolling and welding metal sheets or by integral casting process, in order to provide a symmetrical and uniform spatial reference and avoid fluid distribution deviation caused by irregular shape of tower body 1.

[0022] Feed pipe 2 is located near the top of tower body 1 on the side wall of tower body 1, through which rapeseed crude oil enters tower body 1; packing 3 is filled in the middle of tower body 1 and located below feed pipe 2, used to disperse the rapeseed crude oil entering tower body 1 into an oil film; packing 3 refers to the internal component used to disperse the liquid, which can be implemented by random packing 3 or structured packing 3, such as existing Raschig rings, Pall rings or wire mesh packing 3, which is mainly used to disperse the rapeseed crude oil entering tower body 1 into an oil film to generate a thin film effect to increase the contact area with steam. As a preferred embodiment, the top and bottom of the packing 3 are respectively provided with pressure rings 22 for fixing the packing 3.

[0023] The stripping and desolventizing assembly includes an oil collecting funnel 4 and a steam nozzle 5. The oil collecting funnel 4 is located in the tower body 1 and below the packing 3, and is used to collect rapeseed crude oil dispersed in an oil film. The steam nozzle 5 sprays steam onto the collected rapeseed crude oil and separates the solvent through the steam. An exhaust port 6 is located at the top of the tower body 1 and is used to discharge the steam carrying the solvent out of the tower body 1. The steam nozzle 5 sprays steam onto the rapeseed crude oil collected by the oil collecting funnel 4, which reduces the partial pressure of the solvent and enables the solvent to evaporate efficiently. The steam carrying the solvent rises naturally due to its lower density and is discharged from the tower body 1 through the exhaust port 6 located at the top of the tower body 1, ensuring that the solvent is completely removed while maintaining unidirectional airflow in the tower.

[0024] The oil collecting funnel 4 is surrounded by bracing rods 7 connected to the inner wall of the tower body 1. The oil collecting funnel 4 is suspended at the axis of the tower body 1 by the bracing rods 7. The bracing rods 7 are radial support components connecting the oil collecting funnel 4 and the inner wall of the tower body 1. They can be implemented using multiple evenly distributed rod-shaped or tubular metal structures. The purpose is to stabilize the suspension state of the oil collecting funnel 4 and effectively resist fluid impact and vibration during operation. The oil collecting funnel 4 is suspended at the axis of the tower body 1, meaning that the geometric center of the oil collecting funnel 4 coincides with the central axis of the tower body 1. The purpose is to ensure that the oil collection point is located at the geometric center of the tower body 1 and to optimize the collection path of the oil film-like rapeseed crude oil.

[0025] The oil collecting funnel 4 has a C-shaped pipe 8 on its bottom side. One end of the C-shaped pipe 8 is connected to the bottom of the oil collecting funnel 4, and the other end is connected to an installation pipe 9 facing the bottom of the oil collecting funnel 4. The C-shaped pipe 8 is a guide pipe with a C-shaped cross section. It can be made of bent metal pipe or corrosion-resistant plastic pipe. It is used to guide the collected rapeseed crude oil to be smoothly transferred into the installation pipe 9. The installation pipe 9 is a connecting pipe used to position the steam nozzle 5. It can be made of straight pipe or pipe fitting with flange interface. The purpose is to provide a precise installation reference for the steam nozzle 5 so that the steam action area corresponds precisely to the oil concentration position.

[0026] As attached Figure 2 The steam nozzle 5 shown is L-shaped and extends into the mounting pipe 9 from the bottom. The bottom of the mounting pipe 9 is provided with a sealing plate 10. The steam nozzle 5 is provided with a nozzle 11 located in the mounting pipe 9. A Venturi channel 12 is formed inside the nozzle 11. Steam is introduced from the bottom of the mounting pipe 9 by the steam nozzle 5. The sealing plate 10 at the bottom of the mounting pipe 9 restricts the steam flow direction, so that the steam is concentrated to the nozzle 11 without leakage. The nozzle 11 is located in the mounting pipe 9. The Venturi channel 12 inside it utilizes the principle of fluid acceleration. When the steam passes through, the speed increases and the pressure decreases, generating a negative pressure effect to promote mixing, prolonging the contact time between the steam and the oil film, optimizing the stability of the reverse flow, avoiding contact blind zones, and making the solvent more effectively separated from the oil.

[0027] The nozzle 11 is positioned above the connection point between the C-shaped tube 8 and the mounting tube 9, allowing the steam to diffuse upwards after being ejected, while the rapeseed crude oil flows steadily downwards under gravity after exiting the C-shaped tube 8, forming a clear counter-current flow relationship. This positioning configuration prolongs the contact time between the steam and the oil film, increases the contact area, and enables the steam to penetrate the oil film more evenly, effectively reducing the solvent partial pressure and promoting solvent evaporation, thereby optimizing the overall stripping and desolventizing process.

[0028] Example 2 The feed pipe 2 is L-shaped, with its short side coinciding with the axis of the tower body 1 and perpendicularly connected to a spray hood 13. The bottom of the spray hood 13 is equipped with a perforated plate 14. The short side of the feed pipe 2 coinciding with the axis of the tower body 1 means that the short side extends along the centerline of the tower body 1, ensuring that the rapeseed crude oil enters perpendicularly along the centerline of the tower body 1, eliminating fluid deviation caused by eccentric design. The spray hood 13 is a diffusion device fixed to the end of the feed pipe 2, which can be implemented using a conical or cylindrical hood structure. The purpose is to extend the rapeseed crude oil flow to a wider radial range and increase the coverage area of ​​the crude oil on the cross-section of the tower body 1. In addition, the perforated plate 14 refers to a plate-like structure with multiple through holes, which can be achieved by a uniformly distributed array of circular or square holes. The purpose is to break the rapeseed crude oil into fine droplets, form a uniform spray distribution, achieve preliminary refinement and dispersion, and create conditions for the subsequent packing 3 to disperse into a continuous oil film, thereby enhancing the contact area and contact time between steam and oil film, and improving the sufficiency and stability of the desolvation process.

[0029] The top of the packing 3 is located below the spray hood 13, and the bottom of the packing 3 is provided with an inverted frustum-shaped side cylinder 15. The frustum-shaped side cylinder 15 has a large opening end face and a small opening end face. The diameter of the large opening end face is the same as the diameter of the inner wall of the tower body 1, and the diameter of the small opening end face is smaller than the diameter of the upper port of the oil collecting funnel 4. The top of the packing 3 refers to the vertical height position of the packing 3 in the tower body 1, located in the area directly below the spray hood 13, ensuring that the oil droplets dispersed from the spray hood 13 can fall directly onto the surface of the packing 3. The inverted frustum-shaped side cylinder 15 refers to a type where the large end faces upward and the small end faces downward. The conical structure can be made of corrosion-resistant metal materials to withstand oil flow and temperature changes. Its purpose is to use the conical inner wall to naturally guide the oil flow towards the center during the oil film flow. Specifically, the large opening end face refers to the upper opening of the frustum side cylinder 15, which can be designed as a circle that perfectly matches the inner wall of the tower body 1 to achieve a seamless transition. Its purpose is to eliminate dead angles in oil flow and ensure that all oil flows smoothly into the side cylinder. The small opening end face refers to the lower opening of the frustum side cylinder 15, which is smaller than the size of the upper port of the oil collecting funnel 4 to ensure that the oil does not spill out.

[0030] The tower body 1 is equipped with an arc-shaped baffle 16 located above the feed pipe 2. The arc-shaped baffle 16 has inclined bracing rods 17 connected to the inner wall of the tower body 1 around its top. The arc-shaped baffle 16 has a curved surface structure and can be made of stainless steel or corrosion-resistant alloy material in the form of a hemispherical, parabolic, or elliptical surface. After the rapeseed crude oil is stripped and desolventized by steam, some oil will float to the top of the tower body 1 with the steam and be discharged from the tower body 1 through the exhaust port 6. Therefore, the purpose of setting the arc-shaped baffle 16 is to prevent the oil that floats out with the steam from being discharged from the tower body 1 and to allow it to fall back into the tower body 1, thereby reducing the loss of rapeseed crude oil. The inclined bracing rods 17 are inclined support rods, which can be made of cylindrical rods or flat steel bars and connected to the inner wall of the tower body 1 by welding or bolting. Their purpose is to provide stable support and prevent the baffle from shifting due to fluid pressure or vibration during operation, while minimizing obstruction to the upward path of steam in the tower.

[0031] The tower body 1 is equipped with observation mirrors 19 directly opposite the oil outlet pipe 18 and the arc-shaped baffle 16. The observation mirror 19 is a transparent observation window used to monitor the operating status inside the tower body 1 in real time. It can be made of high-temperature and high-pressure resistant borosilicate glass or quartz glass and is fixed to the outer wall of the tower body 1 through a flange connection structure. The observation mirror 19 is precisely set in the position directly opposite the oil outlet pipe 18 and the arc-shaped baffle 16, so that after the rapeseed crude oil is stripped and desolventized in the tower body 1, the operator can directly observe the flow of oil discharged from the oil outlet pipe 18 and identify oil stagnation or blockage in a timely manner.

[0032] The tower body 1 is equipped with an oil outlet pipe 18 located below the steam nozzle 5. The oil outlet pipe 18 is L-shaped, with the short side of the L-shape coinciding with the axis of the tower body 1 and the pipe opening facing downwards. "Located below the steam nozzle 5" means that the oil outlet pipe 18 is positioned in the area below the steam nozzle 5 to ensure that the oil must undergo sufficient stripping and desolvation in the area of ​​the steam nozzle 5 before being discharged, thereby extending the contact time between the steam and the oil. "The short side of the L-shape coinciding with the axis of the tower body 1" means that the vertical section of the oil outlet pipe 18 is arranged along the centerline of the tower body 1, as shown in the attached diagram. Figure 2 As shown, "the nozzle facing down" means that the opening of the short side of the L-shape (i.e., the nozzle) faces down, which is opposite to the orientation of the short side of the L-shape of the steam nozzle 5.

[0033] The tower body 1 is provided with a suspension support 20 for suspending the tower body 1, and the bottom of the tower body 1 is provided with a drain port 21. The suspension support 20 is used to suspend the tower body 1 on the floor of the production site. It can be implemented by using lifting lugs welded to the outer wall of the tower body 1 or a detachable bracket. The purpose is to provide a stable suspension point and ensure that the installation process is efficient and safe. The drain port 21 is an opening set at the bottom of the tower body 1 for discharging residual liquid. It can be implemented by using a pipe with a valve or a direct opening. The purpose is to thoroughly remove the residue at the bottom of the tower body 1.

[0034] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A novel stripping and desolventizing tower for rapeseed crude oil, characterized in that, include: The tower body is used to form the stripping and desolventizing space for removing solvent from rapeseed crude oil; The feed pipe is located near the top of the tower body on the side wall of the tower body, and rapeseed crude oil enters the tower body through the feed pipe; The packing material is filled in the middle of the tower body and located below the feed pipe, and is used to disperse the rapeseed crude oil entering the tower body into an oil film. A stripping and desolventizing assembly includes an oil collecting funnel and a steam nozzle. The oil collecting funnel is located in the tower body and below the packing material. It is used to collect rapeseed crude oil dispersed in an oil film. The steam nozzle sprays steam onto the collected rapeseed crude oil and separates the solvent through the steam. An exhaust port, located at the top of the tower body, is used to discharge solvent-carrying vapor from the tower body.

2. The novel rapeseed crude oil stripping and desolventizing tower according to claim 1, characterized in that: The tower body is cylindrical, and the oil collecting funnel is provided with a support rod connected to the inner wall of the tower body around its perimeter. The oil collecting funnel is suspended at the axis of the tower body by the support rod. The oil collecting funnel has a C-shaped tube on the side of its bottom. One end of the C-shaped tube is connected to the bottom of the oil collecting funnel, and the other end is connected to an installation pipe facing the bottom of the oil collecting funnel.

3. The novel rapeseed crude oil stripping and desolventizing tower according to claim 2, characterized in that: The steam nozzle is L-shaped and extends into the mounting tube from the bottom. The bottom of the mounting tube is provided with a sealing plate. The steam nozzle is provided with a nozzle located in the mounting tube, and a Venturi channel is formed inside the nozzle.

4. A novel rapeseed crude oil stripping and desolventizing tower according to claim 3, characterized in that: The nozzle opening is higher than the connection point between the C-shaped tube and the mounting tube.

5. A novel rapeseed crude oil stripping and desolventizing tower according to claim 1, characterized in that: The feed pipe is L-shaped, and the short side of the L-shaped feed pipe coincides with the axis of the tower body and is vertically connected to a spray hood. The bottom of the spray hood is provided with a perforated plate.

6. A novel rapeseed crude oil stripping and desolventizing tower according to claim 5, characterized in that: The top of the packing is located below the spray hood, and the bottom of the packing is provided with an inverted frustum side cylinder. The frustum side cylinder has a large opening end face and a small opening end face. The diameter of the large opening end face is the same as the diameter of the inner wall of the tower, and the diameter of the small opening end face is smaller than the diameter of the upper port of the oil collecting funnel.

7. A novel rapeseed crude oil stripping and desolventizing tower according to claim 1, characterized in that: The tower body is provided with an arc-shaped baffle located above the feed pipe, and the arc-shaped baffle is provided with diagonal bracing rods connected to the inner wall of the tower body around its top.

8. A novel rapeseed crude oil stripping and desolventizing tower according to claim 1, characterized in that: The tower body is provided with an oil outlet pipe located below the steam nozzle. The oil outlet pipe is L-shaped, with the short side of the L-shape coinciding with the axis of the tower body and the pipe opening facing downwards.

9. A novel rapeseed crude oil stripping and desolventizing tower according to claim 7, characterized in that: The tower body is equipped with observation mirrors directly opposite the oil outlet pipe and the arc-shaped baffle.

10. A novel rapeseed crude oil stripping and desolventizing tower according to claim 1, characterized in that: The tower body is equipped with a suspension support for suspending the tower body, and the bottom of the tower body is equipped with an exhaust port.

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