Rapid distillation system for high-viscosity materials

Abstract

The utility model relates to the technical field of distillation, in particular to a rapid distillation system for high-viscosity materials. The device comprises a distillation kettle, a reboiler, a circulating pump, a distillation tower, a material temporary storage tank I, a scraper evaporator and a material temporary storage tank II, the reboiler and the circulating pump are connected with the distillation kettle; a light component removal outlet and a high-viscosity outlet are formed in the distillation kettle; the distillation tower is connected with a light component removal outlet of the distillation kettle and a material temporary storage tank I; and the scraper evaporator is connected with the high-viscosity outlet of the distillation kettle and the material temporary storage tank II. According to the utility model, the distillation device and the scraper evaporation device are modified, and meanwhile, the integrated technology is improved, so that the system can achieve the purposes of quickly separating solid and liquid from high-viscosity materials and reducing the energy consumption at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of distillation, in particular to a rapid distillation system for high-viscosity materials. Background Art

[0002] Ethylene carbonate is an important chemical raw material in electrolyte film-forming processes. Its preparation requires processes such as distillation. As the solvent and product evaporate, the viscosity of the residue in the kettle increases, and the ethylene carbonate content in the residue remains high. This distillation method, because steam must heat a large amount of distilled liquid, suffers from long heating times, slow distillation, and poor distillation results. Furthermore, the longer the distillation time, the more likely ethylene carbonate is to polymerize, resulting in the production of large amounts of byproduct residue. Therefore, new technologies are needed to quickly separate ethylene carbonate. Utility Model Content

[0003] In view of the problems existing in the background technology, a rapid distillation system for highly viscous materials is proposed.

[0004] The utility model provides a rapid distillation system for high-viscosity materials, comprising a still, a reboiler, a circulation pump, a distillation tower, a first material temporary storage tank, a scraper evaporator and a second material temporary storage tank; the reboiler and the circulation pump are both connected to the still; a light-removal outlet and a high-viscosity outlet are provided on the still; the distillation tower is connected to the light-removal outlet of the still and the first material temporary storage tank; and the scraper evaporator is connected to the high-viscosity outlet of the still and the second material temporary storage tank.

[0005] Preferably, the vacuum degree of the distillation tower is -0.09--0.099 MPa.

[0006] Preferably, the heating medium of the still, distillation tower and reboiler is hot water or steam.

[0007] Preferably, the heating medium for the distillation column and the reboiler is steam.

[0008] Preferably, the heating steam pressure of the distillation tower and the reboiler is 0.05-0.35 MPa.

[0009] Preferably, the heating medium of the scraped-surface evaporator is hot water or steam.

[0010] Preferably, the heating medium of the scraped surface evaporator is steam.

[0011] Preferably, the temperature of the heating medium of the scraped-surface evaporator is ≤120°C.

[0012] Compared with existing technologies, the present invention offers the following beneficial technical effects: a certain amount of highly viscous material is added to a distillation kettle, a certain liquid level is maintained, and the material is preheated to a certain temperature. The circulating pump and reboiler are activated, and the distillation tower is started. At a certain temperature and pressure, the light component 1 is distilled out and placed in a material temporary storage tank 1. When the evaporation reaches a certain level, a scraper evaporator is used to further distill the highly viscous material, and the light component 2 is placed in a material temporary storage tank 2. The solid material is removed for further processing. By modifying the distillation unit and scraper evaporation unit, and integrating technical improvements, the system can achieve rapid solid-liquid separation of highly viscous materials while reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural block diagram of the rapid distillation system for high-viscosity materials in the utility model.

[0014] Figure numerals: 1. distillation kettle; 2. reboiler; 3. circulation pump; 4. distillation tower; 5. material temporary storage tank 1; 6. scraper evaporator; 7. material temporary storage tank 2. DETAILED DESCRIPTION Example

[0015] like Figure 1 As shown, the utility model proposes a rapid distillation system for high-viscosity materials, including a still 1, a reboiler 2, a circulating pump 3, a distillation tower 4, a material temporary storage tank 5, a scraper evaporator 6 and a material temporary storage tank 7; the reboiler 2 and the circulating pump 3 are both connected to the still 1; a light removal outlet and a high-viscosity outlet are provided on the still 1; the distillation tower 4 is connected to the light removal outlet of the still 1 and the material temporary storage tank 5; the scraper evaporator 6 is connected to the high-viscosity outlet of the still 1 and the material temporary storage tank 7.

[0016] It should be further explained that the vacuum degree of the distillation tower 4 is -0.09-0.099 MPa.

[0017] It should be further explained that the heating medium of the still 1, the distillation tower 4 and the reboiler 2 is hot water or steam.

[0018] It should be further explained that the heating medium of the distillation tower 4 and the reboiler 2 is preferably steam.

[0019] It should be further explained that the heating steam pressure of the distillation tower 4 and the reboiler 2 is 0.05-0.35 MPa.

[0020] It should be further explained that the heating medium of the scraper evaporator 6 is hot water or steam.

[0021] It should be further explained that the heating medium of the scraper evaporator 6 is preferably steam.

[0022] It should be further explained that the temperature of the heating medium of the scraper evaporator 6 is ≤120°C.

[0023] The operating principle of this embodiment is as follows: a certain amount of high-viscosity material is added to distillation kettle 1, maintained at a certain liquid level, and preheated to a certain temperature. The circulating pump 3 and reboiler 2 are then started, and distillation tower 4 is operated. At a certain temperature and pressure, the light component 1 is distilled out and placed in temporary material storage tank 1 5. When evaporation reaches a certain level, the scraped-plane evaporator 6 is used to further distill the high-viscosity material, and the light component 2 is placed in temporary material storage tank 2 7. The solid material is removed for further processing. Example

[0024] Based on the rapid distillation system for highly viscous materials in Example 1, this example proposes a method for using the system in the processing of ethylene carbonate, and the steps are as follows:

[0025] S1. After a certain amount of vinylene carbonate solution is deposited in distillation kettle 1, circulating pump 3 feeds the vinylene carbonate solution into distillation tower 4 for the first stage of purification. During the separation process, distillation tower 4 maintains a vacuum of 0.08-0.12 MPa. Reboiler 2 uses steam at 0.1-0.15 MPa for heating, maintaining a stable bottom temperature of 90-98°C at distillation tower 4. A second-stage condenser is installed at the outlet of the vacuum pump in distillation tower 4, and the condensate enters temporary material storage tank 5.

[0026] S2. After the high-viscosity bottom material after light removal enters the buffer tank, the circulating pump 3 is used to send the material liquid to the scraper evaporator 6 for scraper evaporation treatment. During the scraper evaporation, the distillation tower is heated with steam at 105-115°C to ensure that the scraper evaporation pressure is 0.5-2.5kPa.

[0027] S3. The material temporary storage tank 27 collects vinylene carbonate, and the solid components are passed into the hazardous waste temporary storage tank, waiting to be loaded into barrels.

[0028] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A rapid distillation system for highly viscous materials, characterized in that: The invention comprises a still (1), a reboiler (2), a circulating pump (3), a distillation tower (4), a material temporary storage tank 1 (5), a scraper evaporator (6) and a material temporary storage tank 2 (7); the reboiler (2) and the circulating pump (3) are both connected to the still (1); a light-removal outlet and a high-viscosity outlet are provided on the still (1); the distillation tower (4) is connected to the light-removal outlet of the still (1) and the material temporary storage tank 1 (5); the scraper evaporator (6) is connected to the high-viscosity outlet of the still (1) and the material temporary storage tank 2 (7).

2. A rapid distillation system for highly viscous materials according to claim 1, characterized in that: The vacuum degree of the distillation tower (4) is -0.09-0.099 MPa.

3. The rapid distillation system for highly viscous materials according to claim 1, characterized in that: The heating medium of the still (1), the distillation tower (4) and the reboiler (2) is hot water or steam.

4. A rapid distillation system for highly viscous materials according to claim 3, characterized in that: The heating medium for the distillation column (4) and the reboiler (2) is preferably steam.

5. A rapid distillation system for highly viscous materials according to claim 4, characterized in that: The heating steam pressure of the distillation tower (4) and the reboiler (2) is 0.05-0.35 MPa.

6. The rapid distillation system for highly viscous materials according to claim 1, characterized in that: The heating medium of the scraper evaporator (6) is hot water or steam.

7. A rapid distillation system for highly viscous materials according to claim 6, characterized in that: The heating medium of the scraper evaporator (6) is preferably steam.

8. A rapid distillation system for highly viscous materials according to claim 7, characterized in that: The temperature of the heating medium of the scraper evaporator (6) is ≤120°C.

Images