CN210365223U

CN210365223U - Short-range rectification feeding structure

Info

Publication number: CN210365223U
Application number: CN201920943754.9U
Authority: CN
Inventors: 杨见华; 张玮; 申瑞科; 乔洋川; 苗凯; 杨峰; 赵纲
Original assignee: Shanxi Luan Wax Chemicals Co ltd
Current assignee: Shanxi Luan Wax Chemicals Co ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-04-21
Anticipated expiration: 2029-06-21

Abstract

The utility model relates to the field of chemical production, and discloses a short-stroke rectification feeding structure; the method is applied to the short-range rectification production process; the device comprises a discharge port of an upper stage short-range rectification device and a feed port of a lower stage short-range rectification device, wherein the discharge port is connected with a heavy phase material discharge pipeline, the feed port is connected with a feed pipeline, the liquid level of the discharge port is higher than that of the feed port, a U-shaped feeding pipe is connected between the discharge pipeline and the feed pipeline, and a temperature measuring device is arranged at the bottommost part of the U-shaped feeding pipe; materials are always stored in the U-shaped feeding pipe to play a role in liquid sealing; an insulating layer is arranged outside the U-shaped feeding pipe; the utility model adopts the U-shaped feeding pipe conveying scheme to replace the traditional material pump conveying, the U-shaped feeding pipe ensures a certain liquid level, the liquid sealing purpose is achieved, and the retention time of high-temperature materials in the production process is reduced through the improvement of the feeding structure; meanwhile, the heat loss of the material is reduced; the production process is simplified, and the production stability is improved; the equipment investment is reduced.

Description

Short-range rectification feeding structure

Technical Field

The utility model relates to a chemical production technical field, concretely relates to short distance rectification feeding structure is applied to in the short distance rectification production process.

Background

The short-path distiller is a thermal separation technical process working under the pressure of 1-0.001 mbar, has a low boiling temperature, and is very suitable for thermosensitive and high-boiling-point substances. The temperature of the thermosensitive material is required to reach a certain temperature in the production process, and denaturation, color change, decomposition and the like caused by overlong retention time of the material are avoided. The short-path distillation process is as follows: the material is fed from the top of evaporator, and is continuously and uniformly distributed on the heating surface by means of material-liquid distributor on the rotor, then the material-liquid is scraped into a layer of ultrathin turbulent liquid film by means of film-scraping device, and said liquid film is spirally downwards pushed. In the process, light molecules escaping from the heating surface are condensed into liquid on the built-in condenser through a short route and almost without collision, flow down along the condenser pipe and are discharged through a discharge pipe positioned at the bottom of the evaporator; and residual liquid, namely heavy molecules, is collected in a circular channel below the heating area, then flows out of a discharge pipe on the side surface, enters a heavy phase collecting tank along a heavy phase collecting pipeline, and is pumped into the next stage of short-range distillation equipment through a pump. As shown in fig. 1, the heavy molecular residual liquid in the heavy phase collecting tank of the existing previous-stage short-range rectification equipment enters the feeding structure of the next-stage short-range rectification equipment, the heavy molecular residual liquid in the collecting tank 1 enters the next-stage short-range rectification equipment through a feeding pipeline 3 through two material pumps 2 connected in parallel, the process needs to pass through the material pumps 2, and the transportation distance of the materials is increased.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes prior art's is not enough, provides a short distance rectification feeding structure, and the purpose reduces dwell time and the calorific loss of high temperature material in the production process, improves the stability of production.

The utility model provides a technical scheme that its technical problem adopted is:

a short-range rectification feeding structure comprises a discharge port of an upper-stage short-range rectification device and a feed port of a lower-stage short-range rectification device, wherein the discharge port is connected with a heavy-phase material discharge pipeline, the feed port is connected with a feeding pipeline, the liquid level of the discharge port is higher than that of the feed port, a U-shaped feeding pipe is connected between the discharge pipeline and the feeding pipeline, a first control valve is arranged on the U-shaped feeding pipe, and a temperature measuring device is arranged at the bottommost part of the U-shaped feeding pipe; materials are always stored in the U-shaped feeding pipe to play a role in liquid sealing; an insulating layer is arranged outside the U-shaped feeding pipe; the discharging pipeline on be provided with the second control valve, the feeding pipeline on be provided with the third control valve.

In a further preferred structure, the temperature measuring device is a thermocouple temperature sensor.

Further preferred structure, U-shaped conveying pipe parallelly connected have supplementary inlet line, supplementary inlet line on be connected with collection tank and material pump, be provided with the fourth control valve on the supplementary inlet line.

In a further preferable structure, the discharge port is communicated with the feed port through a U-shaped feeding pipe.

In a further preferred structure, the U-shaped feeding pipe is a stainless steel U-shaped conveying pipeline.

The utility model discloses produced beneficial effect does for prior art.

The utility model adopts the U-shaped feeding pipe conveying scheme to replace the traditional material pump conveying, the U-shaped feeding pipe ensures a certain liquid level, the liquid sealing purpose is achieved, and the vacuum systems of the upper stage and the lower stage are ensured not to be influenced by each other; through the improvement of the feeding structure, the retention time of high-temperature materials in the production process is reduced; meanwhile, the heat loss of the material is reduced; the production process is simplified, and the production stability is improved; the equipment investment is reduced.

Drawings

Fig. 1 is a schematic diagram of a conventional feed structure for short-range rectification.

Figure 2 is a schematic diagram of the short-cut rectification feed structure of example 1.

FIG. 3 is a schematic diagram of the short path rectification feed structure of example 2.

The device comprises a collecting tank, a material pump, a feeding pipeline, a discharging port, a feeding port, a discharging pipeline, a U-shaped feeding pipe, a first control valve, a second control valve, a third control valve, a thermocouple temperature sensor, an auxiliary feeding pipeline, a fourth control valve, a previous-stage short-range rectification device and a next-stage short-range rectification device, wherein the collecting tank is 1, the material pump is 2, the feeding pipeline is 3, the discharging port is 4, the feeding port is 5, the discharging pipeline is 6, the U-shaped feeding pipe is 7, the first control valve is 8, the second control.

Detailed Description

In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, combine embodiment and attached drawing, it is right to go on further detailed description the utility model discloses. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.

Example 1

As shown in fig. 2, the short-path rectification feeding structure comprises a discharge port 4 of an upper short-path rectification device 14 and a feed port 5 of a lower short-path rectification device 15, wherein the liquid level of the discharge port 4 is higher than that of the feed port 5, and the discharge port 4 is communicated with the feed port 5 through a U-shaped feed pipe 7; the U-shaped feeding pipe 7 is a stainless steel U-shaped conveying pipeline, and two ends of the U-shaped feeding pipe 7 are respectively connected with the discharge port 4 and the feed port 5 through flanges; a first control valve 8 is arranged on the U-shaped feeding pipe 7, and a thermocouple temperature sensor 11 for measuring temperature is arranged at the bottommost part of the U-shaped feeding pipe 7; materials are always stored in the U-shaped feeding pipe 7 to play a role of liquid seal, and the vacuum systems of the upper-stage short-range rectification equipment and the lower-stage short-range rectification equipment are ensured not to influence each other; the outside parcel of U-shaped conveying pipe 7 has the heat preservation cotton for prevent that its inside material heat from losing.

The discharge port 4 with liquid level difference is directly connected with the feed port 5 through the U-shaped feed pipe 7, after the first control valve 8 is opened, materials in the discharge port 4 with high liquid level can enter the U-shaped feed pipe 7 under the action of gravity and enter the feed port 5 under the action of liquid pressure, and then the materials enter a lower-level short-range rectifying device from a higher-level short-range rectifying device, so that the whole feeding process is shortened, a material pump is not needed, the conveying path is reduced, and the retention time of high-temperature materials in the production process is shortened; meanwhile, the heat loss of the material is reduced; the production process is simplified, and the production stability is improved; the equipment investment is reduced.

Example 2

As shown in fig. 3, the short-path rectification feeding structure comprises a discharge port 4 of an upper short-path rectification device 14 and a feed port 5 of a lower short-path rectification device 15, wherein the liquid level of the discharge port 4 is higher than that of the feed port 5, the discharge port 4 is connected with a heavy-phase material discharge pipeline 6, the feed port 5 is connected with a feeding pipeline 3, a second control valve 9 is arranged on the discharge pipeline 6, and a third control valve 10 is arranged on the feeding pipeline 3; a U-shaped feeding pipe 7 is connected between the discharging pipeline 6 and the feeding pipeline 3, and the U-shaped feeding pipe 7 is a stainless steel U-shaped conveying pipeline; a first control valve 8 is arranged on the U-shaped feeding pipe 7, and a thermocouple temperature sensor 11 is arranged at the bottommost part of the U-shaped feeding pipe 7 to ensure the effectiveness of temperature measurement; materials are always stored in the U-shaped feeding pipe 7 to play a liquid seal role, and the vacuum systems of the upper-stage short-range rectification equipment and the lower-stage short-range rectification equipment are ensured not to influence each other; the outside parcel of U-shaped conveying pipe 7 has the heat preservation cotton for prevent that its inside material heat from losing. The U-shaped conveying pipe 7 is connected with an auxiliary feeding pipeline 12 in parallel, the auxiliary feeding pipeline 12 is connected with a collecting tank 1 and a material pump 2, a fourth control valve 13 is arranged on the auxiliary feeding pipeline 12, and the auxiliary feeding pipeline 12 is used for auxiliary feeding.

The discharge port 4 with liquid level difference is connected with the feed port 5 through the U-shaped feed pipe 7, after the first control valve 8, the second control valve 9 and the third control valve 10 are opened, materials in the discharge port 4 with high liquid level can enter the U-shaped feed pipe 7 through the discharge pipeline 6 under the action of gravity and enter the feed port 5 through the feed pipeline 3 under the action of liquid pressure, and the materials enter the next-stage short-range rectification equipment from the previous-stage short-range rectification equipment, so that the whole feeding process is shortened, a material pump is not needed, the conveying path is reduced, and the retention time of the high-temperature materials in the production process is shortened; meanwhile, the heat loss of the material is reduced; the production process is simplified, and the production stability is improved; the equipment investment is reduced.

The above description is for further details of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that the present invention can be implemented in a plurality of simple deductions or substitutions without departing from the scope of the present invention, and all such alterations and substitutions should be considered as belonging to the present invention, which is defined by the appended claims.

Claims

1. A short-range rectification feeding structure comprises a discharge port (4) of an upper-stage short-range rectification device (14) and a feeding port (5) of a lower-stage short-range rectification device (15), wherein the discharge port (4) is connected with a heavy-phase material discharge pipeline (6), and the feeding port (5) is connected with a feeding pipeline (3), and is characterized in that the liquid level of the discharge port (4) is higher than that of the feeding port (5), a U-shaped feeding pipe (7) is connected between the discharge pipeline (6) and the feeding pipeline (3), a first control valve (8) is arranged on the U-shaped feeding pipe (7), and a temperature measuring device is arranged at the bottommost part of the U-shaped feeding pipe (7); materials are always stored in the U-shaped feeding pipe (7) to play a role of liquid seal; a heat insulation layer is arranged outside the U-shaped feeding pipe (7); the discharging pipeline (6) is provided with a second control valve (9), and the feeding pipeline (3) is provided with a third control valve (10).

2. A short-cut rectification feed structure according to claim 1, characterized in that the temperature measuring device is a thermocouple temperature sensor (11).

3. The short-stroke rectification feed structure according to claim 1, characterized in that the U-shaped feed pipe (7) is connected with an auxiliary feed line (12) in parallel, the auxiliary feed line (12) is connected with a collecting tank (1) and a material pump (2), and a fourth control valve (13) is arranged on the auxiliary feed line (12).

4. The short-stroke rectification feed structure as claimed in claim 1, wherein the discharge port (4) is communicated with the feed port (5) through a U-shaped feed pipe (7).

5. A short-cut rectification feed structure according to claim 1, characterized in that the U-shaped feed pipe (7) is a stainless steel U-shaped conveying pipe.