Rectification separation mechanism for light liquid paraffin

Abstract

The utility model relates to the technical field of light liquid paraffin rectification separation, in particular to a light liquid paraffin rectification separation mechanism which comprises a supporting frame, a rectification tank is fixedly connected in the supporting frame, the top of the rectification tank is communicated with an air outlet pipe, and the side wall of the rectification tank is fixedly connected with a condenser through a fixing plate. One end of the air outlet pipe is fixedly connected to the input end of the condenser, the output end of the condenser is fixedly connected with a liquid return pipe, the outer wall of the liquid return pipe is communicated with a discharging pipe, the side wall of the rectification tank is communicated with a material conveying pipe, and the bottom of the rectification tank is communicated with a discharging pipe. And a gas-liquid contact mechanism for fully increasing the contact area of gas and liquid is arranged in the rectification tank. Compared with the prior art, the problems of low separation efficiency, low purity and the like caused by insufficient contact area and time in the prior art are solved, a high-efficiency and stable separation process is realized, and the requirements on high-purity light liquid paraffin are met.

Description

Technical Field

[0001] This utility model relates to the field of light liquid paraffin distillation and separation technology, and in particular to a distillation and separation mechanism for light liquid paraffin. Background Technology

[0002] Light liquid paraffin is a hydrocarbon mixture obtained by refining petroleum fractions. It is widely used in chemical, pharmaceutical, food, and daily chemical industries. The purity of the product has a significant impact on the safety and performance of downstream applications. Therefore, in actual production, it is often necessary to effectively separate light liquid paraffin through distillation to remove heavy components and impurities.

[0003] A Chinese patent has been published: a pure benzene distillation column, patent publication number: CN221732407U. The patent "includes a distillation column body and a plurality of filter screens disposed in the inner cavity of the distillation column body. The filter screens are provided with a plurality of filter holes, and a connecting block is provided at the top center of the filter screens. A connecting shaft is provided between the plurality of connecting blocks. A first gear is provided at one end of the connecting shaft, and a cleaning rod is provided on one side of the connecting block."

[0004] Although the distillation column can be cleaned with rubber cleaning strips to remove the filter plates and filter holes within the column body, preventing clogging after prolonged use, the limited number of filter plates, simple structure, and short flow path, coupled with a lack of effective gas-liquid contact mechanisms, reduce the number of gas-liquid phase contacts within the column. This results in insufficient release of mass transfer driving force, making it difficult to completely extract light components at the top and thoroughly separate heavy components at the bottom. Consequently, the spatial cross-contact area between rising gas and falling liquid is significantly reduced, compressing the contact time and interface area between the two phases. This insufficient contact is particularly problematic when processing light liquid paraffin mixtures with narrow boiling point differences, leading to decreased distillation efficiency, low distillate purity, and unstable separation efficiency. Therefore, the overly simplified distillation mechanisms in existing technologies are no longer sufficient to meet the separation requirements of high-purity light liquid paraffin. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a distillation separation mechanism for lightweight liquid paraffin, so as to solve the problem that the lack of an effective gas-liquid contact mechanism leads to a reduction in the number of contacts between the gas and liquid phases in the column, which greatly reduces the spatial cross-contact area between the rising gas and the falling liquid, thus compressing the contact time and interface area of ​​the two phases.

[0006] To achieve the above objectives, this utility model provides a distillation and separation mechanism for lightweight liquid paraffin, comprising a support frame, a distillation tank fixedly connected inside the support frame, an outlet pipe connected to the top of the distillation tank, a condenser fixedly connected to the side wall of the distillation tank via a fixing plate, one end of the outlet pipe fixedly connected to the input end of the condenser, a return pipe fixedly connected to the output end of the condenser, a discharge pipe connected to the outer wall of the return pipe, a conveying pipe connected to the side wall of the distillation tank, a discharge pipe connected to the bottom of the distillation tank, and a gas-liquid contact mechanism provided inside the distillation tank to fully increase the gas-liquid contact area.

[0007] Preferably, the gas-liquid contact mechanism includes two opposing gathering plates fixedly connected to the inner wall of the distillation tank. The gathering plates are L-shaped, and four flow dividers are fixedly connected to the top of the gathering plates. The bottom of the flow dividers is connected to the bottom of the gathering plates. The outer walls of the four flow dividers are provided with multiple equidistant and uniformly distributed vent holes.

[0008] Preferably, the inner wall of the distillation tank is fixedly connected to a drip pipe near the bottom of the aggregating plate. The top and bottom of the drip pipe are provided with multiple equally spaced and evenly distributed drip holes. The side wall of the drip pipe extends to the side wall of the aggregating plate and is provided with a water distribution port. The inner wall of the distillation tank is fixedly connected to a receiving mesh cover near the bottom of the drip pipe. The inside of the receiving mesh cover is filled with filler.

[0009] Preferably, two cleaning ports are fixedly connected to both sides of the outer wall of the distillation tank. The cleaning ports and the receiving mesh cover are on the same horizontal plane. A threaded groove is opened on the outer wall of one end of the cleaning port, and a sealing cap is threadedly connected to one end of the cleaning port.

[0010] Preferably, a waterproof ring for preventing liquid leakage is provided between the opposing surfaces of the cleaning port and the sealing cap.

[0011] Preferably, the bottom of the drip tube, near the inner wall of the distillation tank, gradually extends towards the mesh cover.

[0012] The beneficial effects of this utility model are:

[0013] The distillation separation mechanism for light liquid paraffin exhibits significant optimization in its gas-liquid contact mechanism, particularly when processing light liquid paraffin. It effectively improves the contact efficiency between the gas and liquid phases. Through the arrangement of multiple packing materials, the function of the flow divider, and the placement of vents, the gas-liquid contact mechanism significantly increases the contact time and interfacial area between the gas and liquid, ensuring sufficient contact and heat / mass exchange between the two phases, thereby improving distillation efficiency. Especially when processing light liquid paraffin mixtures with narrow boiling point differences, the optimized gas-liquid contact path effectively separates light and heavy components, reducing the problem of decreased distillation efficiency caused by insufficient gas-liquid contact. This promotes evaporation and separation processes, effectively increasing the extraction rate of light components at the top of the column while ensuring the complete retention of heavy components at the bottom. Therefore, it improves the contact efficiency between the gas and liquid phases, ensuring the separation of high-purity light liquid paraffin. This solves the problems of low separation efficiency and low purity caused by insufficient contact area and time in existing technologies, achieving a highly efficient and stable separation process that meets the demand for high-purity light liquid paraffin. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the distillation tank of this utility model;

[0017] Figure 3 This is a schematic diagram of the gas-liquid contact mechanism of this utility model;

[0018] Figure 4 This utility model Figure 1 Enlarged 3D structural diagram at point A.

[0019] The diagram is marked as follows:

[0020] 1. Support frame; 2. Distillation tank; 3. Gas outlet pipe; 4. Condenser; 5. Liquid return pipe; 6. Discharge pipe; 7. Feed pipe; 8. Discharge pipe; 9. Gathering plate; 10. Diverter hood; 11. Gas vent; 12. Drip pipe; 13. Drip hole; 14. Water outlet; 15. Container mesh cover; 16. Packing material; 17. Cleaning port; 18. Threaded groove; 19. Sealing cap; 20. Waterproof ring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0022] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] like Figures 1 to 4 As shown, a distillation separation mechanism for lightweight liquid paraffin includes a support frame 1, a distillation tank 2 fixedly connected inside the support frame 1, an outlet pipe 3 connected to the top of the distillation tank 2, a condenser 4 fixedly connected to the side wall of the distillation tank 2 via a fixing plate, one end of the outlet pipe 3 fixedly connected to the input end of the condenser 4, a return pipe 5 fixedly connected to the output end of the condenser 4, a discharge pipe 6 connected to the outer wall of the return pipe 5, a conveying pipe 7 connected to the side wall of the distillation tank 2, a discharge pipe 8 connected to the bottom of the distillation tank 2, and a contact mechanism provided inside the distillation tank 2 to fully increase the contact area between the gas and the liquid.

[0024] Further, see attached document. Figure 2 and Figure 3 As shown, the gas-liquid contact mechanism includes two opposing gathering plates 9 fixedly connected to the inner wall of the distillation tank 2. The gathering plates 9 are L-shaped. Four diversion hoods 10 are fixedly connected to the top of the gathering plates 9. The bottom of the diversion hoods 10 is connected to the bottom of the gathering plates 9. The outer walls of the four diversion hoods 10 are provided with multiple equidistant and evenly distributed vent holes 11. The inner wall of the distillation tank 2 is fixedly connected to the bottom of the gathering plates 9. The top and bottom of the drip pipes 12 are provided with multiple equidistant and evenly distributed drip holes 13. The side wall of the drip pipes 12 extends to the side wall of the gathering plates 9 and is provided with a water distribution port 14. The inner wall of the distillation tank 2 is fixedly connected to the bottom of the drip pipes 12. The inside of the receiving mesh 15 is filled with filler 16.

[0025] First, the light liquid paraffin raw material to be processed is injected into the interior of the distillation tank 2 through the feed pipe 7. After the raw material enters the distillation tank 2, the liquid at the bottom of the distillation tank 2 is heated by an external heating device. After being heated to the boiling point, the liquid begins to boil and generate gas. The generated gas is guided into the interior of the condenser 4 through the gas outlet pipe 3 at the top of the distillation tank 2. In the condenser 4, it is cooled and condensed into liquid, and then flows back into the distillation tank 2 through the return pipe 5.

[0026] The condensed liquid first gathers at the top of the upper collecting plate 9 located inside the distillation tank 2. When the liquid accumulates to a certain amount, it flows along the edge of the collecting plate 9 into the collecting plate 9 below, layer by layer. During the process of the liquid flowing by gravity, a portion of the liquid flows through the water distribution port 14 into the drip hole 13 at its bottom, and the liquid drips from the drip hole 13 onto the surface of the packing 16. The remaining liquid continues to flow along the direction of gravity to the next collecting plate 9 and finally gathers at the bottom of the distillation tank 2, providing a liquid source for the next round of heating.

[0027] As the liquid is heated and boiled again, the gas generated flows in the upward direction. The gas passes through the packing 16, the diversion hood 10 and the vent 11 arranged in multiple positions inside the distillation tank 2. When passing through the packing 16, due to the complex internal channel structure and irregular flow channels of the packing 16, the gas is forced to fully contact and exchange heat and mass with the liquid on the surface of the packing 16, achieving preliminary evaporation and separation. Different components in the light liquid paraffin have different boiling points. The light components evaporate first and rise with the gas flow, while the heavy components are relatively retained at the bottom of the tower.

[0028] As the gas continues to rise, it enters the interior of the diversion hood 10 and exits through the vent 11 provided on the diversion hood 10. When the gas exits through the vent 11, it passes through the liquid at the top of the collecting plate 9 in the form of bubbles, achieving gas-liquid contact and heat and mass exchange again. In this process, the separation between components is further promoted. The gas finally converges to the top area of ​​the inner wall of the distillation tank 2 and enters the condenser 4 again through the gas outlet pipe 3 to complete the condensation process.

[0029] Once the separated products reach the set conditions, the separated liquid products can be discharged and collected through the discharge pipe 6 set at the bottom of the return pipe 5, thereby completing the entire efficient distillation and separation process of light liquid paraffin.

[0030] The gas-liquid contact mechanism exhibits significant optimization effects, particularly in the processing of light liquid paraffin. It effectively improves the contact efficiency between the gas and liquid phases. Through the arrangement of multiple packing materials 16, the function of the diversion hood 10, and the setting of the vent 11, the gas-liquid contact mechanism significantly increases the contact time and interfacial area between the gas and liquid, ensuring sufficient contact and heat / mass exchange between the two phases, thereby improving distillation efficiency. Especially when processing mixtures of light liquid paraffin with narrow boiling point differences, the optimized gas-liquid contact path effectively separates light and heavy components, reducing the problem of decreased distillation efficiency caused by insufficient gas-liquid contact. This promotes evaporation and separation processes, effectively increasing the extraction rate of light components at the top of the column while ensuring the complete retention of heavy components at the bottom. Therefore, it improves the contact efficiency between the gas and liquid phases, ensuring the separation effect of high-purity light liquid paraffin. It solves the problems of low separation efficiency and low purity caused by insufficient contact area and time in existing technologies, achieving a highly efficient and stable separation process and meeting the demand for high-purity light liquid paraffin.

[0031] Further, see attached document. Figure 4 As shown, two cleaning ports 17 are fixedly connected to both sides of the outer wall of the distillation tank 2. The cleaning ports 17 and the receiving mesh cover 15 are on the same horizontal plane. A threaded groove 18 is opened on the outer wall of one end of the cleaning port 17, and a sealing cover 19 is threadedly connected to one end of the cleaning port 17. A waterproof ring 20 is provided between the opposite surfaces of the cleaning port 17 and the sealing cover 19 to prevent liquid leakage. When the packing 16 has been used for a long time, impurities will be present in the packing 16. By rotating the sealing cover 19 to open the cleaning port 17, the staff can take out and clean the packing 16, which is convenient for cleaning and use.

[0032] Further, see attached document. Figure 2 As shown, the bottom of the drip pipe 12, near the inner wall of the distillation tank 2, gradually extends towards the receiving mesh cover 15. The liquid flowing into the drip pipe 12 will flow evenly towards one end of the drip pipe 12 and out of the drip hole 13, thereby wetting the packing 16.

[0033] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0034] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A distillation and separation mechanism for light liquid paraffin, comprising a support frame (1), wherein a distillation tank (2) is fixedly connected inside the support frame (1), the top of the distillation tank (2) is connected to an outlet pipe (3), and a condenser (4) is fixedly connected to the side wall of the distillation tank (2) via a fixing plate, characterized in that: One end of the gas outlet pipe (3) is fixedly connected to the input end of the condenser (4), and the output end of the condenser (4) is fixedly connected to the liquid return pipe (5). The outer wall of the liquid return pipe (5) is connected to the discharge pipe (6), the side wall of the distillation tank (2) is connected to the conveying pipe (7), the bottom of the distillation tank (2) is connected to the discharge pipe (8), and the interior of the distillation tank (2) is provided with a gas-liquid contact mechanism to fully increase the gas-liquid contact area.

2. The distillation and separation mechanism for light liquid paraffin according to claim 1, characterized in that, The gas-liquid contact mechanism includes two opposing gathering plates (9) fixedly connected to the inner wall of the distillation tank (2). The gathering plates (9) are L-shaped. Four flow dividers (10) are fixedly connected to the top of the gathering plates (9). The bottom of the flow dividers (10) is connected to the bottom of the gathering plates (9). The outer walls of the four flow dividers (10) are provided with multiple equidistant and evenly distributed vent holes (11).

3. The distillation and separation mechanism for light liquid paraffin according to claim 2, characterized in that, The inner wall of the distillation tank (2) is fixedly connected to the bottom of the aggregating plate (9) with drip pipes (12). The top and bottom of the drip pipes (12) are provided with multiple equally spaced and evenly distributed drip holes (13). The side wall of the drip pipes (12) extends to the side wall of the aggregating plate (9) and is provided with a water distribution port (14). The inner wall of the distillation tank (2) is fixedly connected to the bottom of the drip pipes (12) with a receiving mesh cover (15). The inside of the receiving mesh cover (15) is filled with filler (16).

4. The distillation and separation mechanism for light liquid paraffin according to claim 3, characterized in that, Two cleaning ports (17) are fixedly connected to both sides of the outer wall of the distillation tank (2). The cleaning ports (17) and the receiving mesh cover (15) are on the same horizontal plane. A threaded groove (18) is opened on the outer wall of one end of the cleaning port (17), and a sealing cap (19) is threaded to one end of the cleaning port (17).

5. The distillation and separation mechanism for light liquid paraffin according to claim 4, characterized in that, A waterproof ring (20) is provided between the opposite surfaces of the cleaning port (17) and the sealing cap (19) to prevent liquid leakage.

6. The distillation and separation mechanism for light liquid paraffin according to claim 3, characterized in that, The bottom of the drip pipe (12) near the inner wall of the distillation tank (2) gradually extends toward the receiving mesh cover (15).

Images