Reduced pressure distillation system

Abstract

The utility model provides a reduced pressure distillation system which comprises a kettle body, a cooling tower and a receiving tank, the kettle body penetrates through the cooling tower through a pipeline to be communicated with the receiving tank, a jacket is fixed to the outer wall of the kettle body, a propeller is arranged in the kettle body, a conical barrel with an upward large-diameter end is vertically arranged in the kettle body, and the conical barrel is fixed to the inner wall of the kettle body through a connecting rod; a liquid distribution disc higher than the liquid level is fixed to the upper end of the inner wall of the conical barrel, and the propeller is arranged at the lower end of the liquid level in the conical barrel and pushes liquid downwards. According to the reduced pressure distillation system disclosed by the invention, the synthetic solution can be circulated along the inside and outside of the conical barrel through pushing of the propeller, so that bumping caused by overheated liquid formed by the synthetic solution during reduced pressure distillation is avoided, and the distillation efficiency is also improved. When entering the conical barrel, the synthetic solution can flow downwards along the conical surface of the inner wall and is slowed down through interception of the liquid distribution disc. The evaporation area during distillation is increased by the conical surface and the liquid distribution disc, and meanwhile, the synthetic solution is slowed down during falling, so that the evaporation effect is enhanced.

Description

Technical Field

[0001] This application relates to vacuum distillation technology in the synthesis process of rubber anti-scorching agents, and more particularly to a vacuum distillation system. Background Technology

[0002] Vacuum distillation is a technique that distills liquids under conditions below atmospheric pressure. It lowers the boiling point of the liquid and prevents the liquid from undergoing decomposition, polymerization, or oxidation at high temperatures. Vacuum distillation requires the use of air intake or stirring to prevent bumping, while heating is used to remove the solvent and achieve the purpose of distillation.

[0003] In existing vacuum distillation systems, the synthesis solution is heated at low pressure within a vessel, and the evaporated vapor enters a condensation system through pipes and is condensed into a receiving tank. In these systems, the evaporation surface area of ​​the synthesis solution is equal to the cross-sectional area of ​​the vessel, and this fixed surface area leads to low distillation efficiency. Utility Model Content

[0004] This application provides a vacuum distillation system to solve the problems of small evaporation area and low distillation efficiency in vacuum distillation systems.

[0005] This application provides a vacuum distillation system, including a vessel, a cooling tower, and a receiving tank. The vessel is connected to the receiving tank via a pipe passing through the cooling tower. A jacket is fixed to the outer wall of the vessel. A propeller is installed inside the vessel. A large-diameter, upward-facing conical cylinder is vertically installed inside the vessel. The conical cylinder is fixed to the inner wall of the vessel via a connecting rod. A liquid distribution plate higher than the liquid surface is fixed to the upper end of the inner wall of the conical cylinder. The propeller is located at the lower end of the liquid surface inside the conical cylinder and pushes the liquid downward.

[0006] Optionally, the inner wall of the conical cylinder is fixed with multiple layers of annular liquid distribution discs, each layer of the liquid distribution discs extending from top to bottom in a stepped manner towards the center.

[0007] Optionally, a liquid inlet hole is provided on the conical cylinder between the two adjacent liquid distribution discs.

[0008] Optionally, a hollow cavity is formed in the side wall of the conical cylinder, and the connecting rod is a hollow tube that connects the jacket and the cavity inside the conical cylinder.

[0009] The vacuum distillation system provided in this application features a conical cylinder, and the synthesis solution is circulated inside and outside the cylinder by a propeller. This prevents the synthesis solution from becoming a superheated liquid during vacuum distillation, thus avoiding violent boiling and improving distillation efficiency. When the synthesis solution enters the conical cylinder, it flows downwards along the conical surface of the inner wall and is slowed down by a distribution plate. The conical surface and distribution plate increase the evaporation area during distillation, and the slowing down of the falling synthesis solution also enhances the evaporation effect. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a front view of a vacuum distillation system provided in an embodiment of this application;

[0012] Figure 2 This is a top view of a vacuum distillation system provided in an embodiment of this application;

[0013] Figure 3 A vacuum distillation system provided in an embodiment of this application Figure 1 A sectional view;

[0014] Figure 4 This is a schematic diagram of the inner cavity of the conical cylinder of a vacuum distillation system provided in an embodiment of this application.

[0015] Explanation of reference numerals in the attached figures:

[0016] 1. Kettle body; 2. Cooling tower; 3. Receiving tank; 4. Pipeline; 5. Jacket; 6. Propeller; 7. Conical cylinder; 8. Connecting rod; 9. Liquid distribution plate; 10. Liquid inlet; 11. Cavity. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0018] like Figures 1-4 As shown, one embodiment of this application provides a vacuum distillation system, including a vessel body 1, a cooling tower 2, and a receiving tank 3. The vessel body 1 is connected to the receiving tank 3 through a pipe 4 passing through the cooling tower 2. A jacket 5 is fixed to the outer wall of the vessel body 1. A propeller 6 is provided inside the vessel body 1. A large-diameter conical cylinder 7 with its end facing upward is vertically provided inside the vessel body 1. The conical cylinder 7 is fixed to the inner wall of the vessel body 1 through a connecting rod 8. A liquid distribution plate 9 higher than the liquid surface is fixed to the upper end of the inner wall of the conical cylinder 7. The propeller 6 is located at the lower end of the liquid surface inside the conical cylinder 7 and pushes the liquid downward.

[0019] In use, the synthesis solution enters the vessel body 1 through the inlet pipe, ensuring that the liquid level of the synthesis solution is higher than the propeller 6 and lower than the distribution plate 9. The synthesis solution is distilled in the vessel body 1 by water bath heating through the jacket 5. At the same time, the vacuum system connected to the receiving tank 3 draws air through the pipe 4 to create a negative pressure inside the vessel body 1.

[0020] During the vacuum distillation process, propeller 6 is activated, which pushes the synthesis solution inside conical cylinder 7 downwards. After flowing downwards, the synthesis solution in conical cylinder 7 flows back upwards along the inner wall of vessel body 1. The synthesis solution flowing back upwards between conical cylinder 7 and the inner wall of vessel body 1 overflows from the upper end of conical cylinder 7 and enters the inner wall of conical cylinder 7 to form a circulation.

[0021] In this embodiment, a conical cylinder 7 is provided, and the propeller 6 pushes the synthetic solution to circulate inside and outside the conical cylinder 7. This avoids the formation of superheated liquid and bumping during vacuum distillation, and also improves the distillation efficiency. When the synthetic solution enters the conical cylinder 7, it flows downward along the conical surface of the inner wall and is slowed down by the liquid distribution plate 9. The conical surface and the liquid distribution plate 9 increase the evaporation area during distillation, and the slowing down of the synthetic solution as it falls also enhances the evaporation effect.

[0022] In one possible implementation, the inner wall of the conical cylinder 7 is fixed with multiple layers of annular liquid distribution discs 9, each layer of the liquid distribution discs 9 extending from top to bottom in a stepped manner towards the center.

[0023] The multi-layer liquid distribution plate 9 forms a stepped structure that can perform multi-stage diversion and interception of the falling synthetic solution, further improving the deceleration effect and increasing the evaporation area.

[0024] In one possible implementation, a liquid inlet hole 10 is provided on the conical cylinder 7 between two adjacent liquid distribution plates 9.

[0025] The synthesis solution, which flows upward between the inner wall of the conical cylinder 7 and the vessel body 1, can enter the conical cylinder 7 through the inlet hole 10 after being diverted for circulation, increasing the circulation path of the synthesis solution and the replenishment rate in the conical cylinder 7.

[0026] In one possible implementation, a hollow cavity 11 is formed in the side wall of the conical cylinder 7, and the connecting rod 8 is a hollow tube that connects the jacket 5 and the cavity 11 in the conical cylinder 7.

[0027] The heating liquid used for water bath heating in the jacket 5 can enter the cavity 11 of the conical cylinder 7 through the connecting rod 8, and heat the synthesis solution through the inner and outer walls of the conical cylinder 7, thereby increasing the heating area and improving the heat exchange and heat conduction efficiency of the synthesis solution.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A reduced pressure distillation system comprising a kettle body (1), a cooling tower (2) and a receiving tank (3), the kettle body (1) is communicated with the receiving tank (3) through a pipeline (4) passing through the cooling tower (2), and a jacket (5) is fixed on the outer wall of the kettle body (1), characterized in that: The propeller (6) is arranged in the kettle body (1), a large-diameter conical cylinder (7) with the upper end upward is arranged vertically in the kettle body (1), the conical cylinder (7) is fixed to the inner wall of the kettle body (1) through the connecting rod (8), the upper end of the inner wall of the conical cylinder (7) is fixed with the liquid distribution plate (9) which is higher than the liquid level, and the propeller (6) is arranged below the liquid level in the conical cylinder (7) and pushes the liquid downward.

2. The reduced pressure distillation system of claim 1, wherein: The inner wall of the conical cylinder (7) is fixed with multiple layers of annular liquid distribution plates (9), each layer of the liquid distribution plates (9) is arranged in a stepped manner along the length towards the center from top to bottom.

3. The reduced pressure distillation system of claim 2, wherein: The conical cylinder (7) between two adjacent layers of the liquid distribution plates (9) is provided with the liquid inlet hole (10).

4. The reduced pressure distillation system of any of claims 1-3, wherein: The side wall of the conical cylinder (7) is formed with the hollow cavity (11), the connecting rod (8) is a pipe with the hollow interior, and the cavity (11) in the conical cylinder (7) and the jacket (5) are communicated through the connecting rod (8).

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