CN218529839U

CN218529839U - Extraction system applied to rectifying tower and automatic layering and separating unit thereof

Info

Publication number: CN218529839U
Application number: CN202222612035.3U
Authority: CN
Inventors: 赖愉豪; 鲍燕娟; 周齐; 张小江
Original assignee: Shenzhen Sunevap Tech Co ltd
Current assignee: Shenzhen Sunevap Tech Co ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-02-28
Anticipated expiration: 2032-09-30

Abstract

The utility model belongs to the technical field of fine chemical rectification separation, and particularly discloses an automatic separation layering unit, which comprises a tank body, wherein the tank body is provided with a first baffle, a second baffle, a feeding interface, a first discharging interface and a second discharging interface; the first baffle and the second baffle are positioned in the tank body and are limited with the tank body to form a first material area, a second material area and a third material area, the upper side of the first material area is communicated with the upper side of the second material area, the lower side of the second material area is communicated with the lower side of the third material area, the feeding interface is communicated with the first material area, the first discharging interface is communicated with the upper side of the third material area, and the second discharging interface is communicated with the lower end of the third material area. Adopt the technical scheme of the utility model, it is integrative to realize the automatic stratification separation of material, has realized that there is the accurate and automatic stratification separation of extraction looks and backward flow looks in layering material and the extractive distillation in the rectifying column tower top, has ensured the purity and the stability of the double-phase material of extraction and backward flow.

Description

Extraction system applied to rectifying tower and automatic layering and separating unit thereof

Technical Field

The utility model relates to a meticulous chemical industry rectification separation technical field, in particular to be applied to extraction system and automatic layering separation element of rectifying column.

Background

In recent years, along with rapid development of industry, the variety of bulk chemical goods is increasingly diversified, the requirements of fine chemical products are increasingly strict, rectification is used as one of important separation means for production of the fine chemical products, the technology is subjected to long-term development and still faces a plurality of bottlenecks to overcome, especially in the rectification of relatively complex materials such as extractive rectification, layered separation and reflux of extracted materials, thermosensitive materials, flammable and explosive materials, toxic materials and the like, the control means is still relatively deficient, the process and the control means are often complex but cannot achieve ideal effects, and the automation degree and precision of process control still have a large promotion space; how to realize the high-efficiency fine operation of the rectification unit by using a simple and short process and a control means becomes a great problem of rectification design and operation;

in the organic product production and wastewater rectification treatment processes in the industries of fine chemical engineering, pharmacy, environmental protection treatment and the like, the composition of water and various organic components in raw materials and wastewater can be met, the azeotropic or layering phenomenon of some materials in the separation process often exists, a third component and the raw materials are often added to the azeotropic phenomenon to form a new azeotropic system and are extracted from the top of a tower, the new azeotropic system formed by the commonly added third component has the mutually incompatible layering phenomenon, the separation and reflux of the third component and the extracted materials are convenient, the extracted materials need to be extracted, and the third component still needs to return to the rectification tower; in the traditional azeotropic distillation, extractive distillation and separation of layered materials at the top of the tower, extraction-standing again-sight glass observation-separation-pump reflux extraction is mostly adopted, or the middle section of a reflux tank is provided with a plurality of stages of reflux ports with different liquid levels, and the opening and closing of the reflux ports are controlled by the liquid levels, so that the purpose of controlling the supernatant to flow back to the top of the tower or be extracted is achieved; the separation mode of extracting, standing again, observing by a sight glass, separating, pumping back flow extracting or arranging multistage different liquid level back flow ports at the middle section of a back flow tank is complex in process and difficult to control, and the back flow tank is disturbed by the falling of condensate or needs to be provided with a plurality of separation tanks, so that the process is complex, the control is complex, and the investment cost is relatively high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an extraction system and automatic layering and separating unit thereof for rectifying column to the not enough that prior art exists.

In order to solve the technical problem, the utility model discloses a technical scheme does: an automatic separation and layering unit comprises a tank body, wherein the tank body is provided with a first baffle, a second baffle, a feeding interface, a first discharging interface and a second discharging interface; the first baffle and the second baffle are positioned in the tank body and are limited with the tank body to form a first material area, a second material area and a third material area, the upper side of the first material area is communicated with the upper side of the second material area, the lower side of the second material area is communicated with the lower side of the third material area, the feeding interface is communicated with the first material area, the first discharging interface is communicated with the upper side of the third material area, and the second discharging interface is communicated with the lower end of the third material area.

Optionally, the first baffle is vertically arranged.

The utility model also provides an extraction system applied to the rectifying tower, which comprises a heating unit, an automatic separation and layering unit, a condensing unit, a pressure control unit and an extraction unit; the heating unit is connected with the rectifying tower, the first discharging interface is connected with the rectifying tower, the condensing unit is respectively connected with the rectifying tower and the feeding interface, the pressure control unit is connected with the condensing unit, and the extracting unit is connected with the second discharging interface.

Optionally, the heating unit comprises a reboiler, a steam pipeline and a steam regulating valve; the reboiler is connected with the rectifying column, and steam conduit is connected with the reboiler, and steam control valve sets up on steam conduit.

Optionally, the condensing unit comprises a condenser.

Optionally, the pressure control unit comprises a vacuum separation tank and a vacuum pump; the vacuum separation tank is connected with the condenser, and the vacuum pump is connected with the vacuum separation pump.

Optionally, the extraction unit comprises an extraction tank and a discharge pump; the extraction tank is connected with the second discharging interface, and the discharging pump is connected with the extraction tank.

Optionally, the system further comprises a production flow meter and a production regulating valve; the extraction flow meter and the extraction regulating valve are respectively arranged on a connecting flow passage of the extraction unit and the second discharging interface.

Optionally, a reflux flowmeter is further included; the reflux flowmeter is arranged on a connecting flow channel of the first discharging interface and the rectifying tower.

Optionally, the rectifying tower is connected with the first discharging interface through the connecting interface, and the height of the first discharging interface is greater than that of the connecting interface.

The automatic separation layering unit provided by the invention is designed in a special innovative structure, realizes the integration of automatic layering and separation of materials, realizes the accurate and automatic layering and separation of layered materials at the top of a rectifying tower and an extraction phase and a reflux phase in extractive rectification, and ensures the purity and stability of the materials of a extraction phase and a reflux phase; compared with the traditional processes of distillation and extractive distillation, such as extraction first, standing or extraction layering separation and reflux second, the process reduces equipment investment, greatly improves separation efficiency, facilitates continuous automatic operation, and ensures the component stability of the reflux extracted liquid; compared with the traditional rectification and extractive rectification multi-liquid-level dislocation control layered reflux, the influence of turbulent flow is greatly reduced by the separation of the first baffle and the second baffle, and the difficulty and the accuracy of continuous separation operation are effectively solved; the device is widely applicable to separation and reflux control operation of materials with layering phenomena of extractive distillation and tower top condensate in the distillation production process, and meanwhile, the device is simple in process flow, easy to realize, high in automation degree, low in operation cost, capable of meeting sustainable development requirements, and widely applicable to the actual industrial production process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is a schematic structural view of an automatic separation and stratification unit of the present invention;

fig. 2 is a schematic structural diagram of the extraction system of the present invention.

In the figure, 10-automatic separation and layering unit, 11-tank body, 12-first baffle, 13-second baffle, 14-feeding interface, 15-first discharging interface, 16-second discharging interface, 17-first material area, 18-second material area, 19-third material area, 20-heating unit, 30-pressure control unit, 40-extraction unit, 50-rectifying tower, 60-reflux flowmeter, 70-extraction flowmeter, 80-extraction regulating valve and 90-condensation unit.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "thickness", "up and down, front and back, left and right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the indicated element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a defined feature of "first", "second" may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. It should be noted that unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and include, for example, fixed or removable connections or integral connections; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly connected or indirectly connected through intervening media profiles, either internally or in any combination thereof. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In order to explain the technical means of the present invention, the following description will be given by way of specific examples.

As shown in fig. 1, in an embodiment of the present invention, an automatic separation and layering unit is provided, which includes a tank 11, the tank 11 is provided with a first baffle 12, a second baffle 13, a feeding port 14, a first discharging port 15, and a second discharging port 16; the first baffle plate 12 and the second baffle plate 13 are positioned in the tank body 11 and define a first material area 17, a second material area 18 and a third material area 19 with the tank body 11, the upper side of the first material area 17 is communicated with the upper side of the second material area 18, the lower side of the second material area 18 is communicated with the lower side of the third material area 19, the feeding port 14 is communicated with the first material area 17, the first discharging port 15 is communicated with the upper side of the third material area 19, and the second discharging port 16 is communicated with the lower end of the third material area 19. Specifically, the upper end of the first baffle 12 is connected with the top end of the tank body 11, and the distance between the lower end of the first baffle and the lower end of the tank body 11 is about 1/3 of the total height of the tank body 11; the lower end of the second baffle 13 is connected with the lower end of the tank body 11, and the upper end of the second baffle is away from the upper end of the tank body 11 by about 1/2 of the total height of the tank body 11, so that a first material zone 17, a second material zone 18 and a third material zone 19 are defined with the tank body 11.

The utility model discloses autosegregation layering unit is when using, the material gets into first material district 17 from feeding interface 14 earlier, this district is for mixing the liquid district, because toluene and water are immiscible, this district contains a large amount of liquid drops smuggle secretly, toluene about 77%,23% water, under receiving the gravity promotion, the material from top to bottom gets into second material district 18 through overhead baffle upside intercommunication opening, third material district 19, block the vortex effect by first baffle 12, third material district 19 can the separation of stewing, receive the gravity settling effect, the toluene layer come-up that density ratio water layer is little, form supernatant toluene layer at third material district 19 upside and flow back from first ejection of compact interface 15, toluene content about 98%, form clear liquid water phase layer and adopt under third material district 19 downside. Preferably, the first baffle 12 is vertically disposed to improve the turbulence blocking effect when the material enters the second material region 18.

The automatic separation layering unit provided by the invention is designed in a special innovative structure, realizes the integration of automatic layering and separation of materials, realizes the accurate and automatic layering and separation of layered materials at the top of the rectifying tower 50 and an extraction phase and a reflux phase in extraction rectification, and ensures the purity and stability of the materials of a extraction phase and a reflux phase; compared with the traditional processes of distillation and extractive distillation, such as extraction first, standing or extraction layering separation and reflux second, the process reduces equipment investment, greatly improves separation efficiency, facilitates continuous automatic operation, and ensures the component stability of the reflux extracted liquid; compared with the traditional rectification and extractive rectification multi-liquid-level dislocation control layered reflux, the influence of turbulent flow is greatly reduced by the separation of the first baffle 12 and the second baffle 13, and the difficulty and the accuracy of continuous separation operation are effectively solved; the device is widely applicable to separation and reflux control operation of materials with layering phenomena of extractive distillation and tower top condensate in the distillation production process, and meanwhile, the device is simple in process flow, easy to realize, high in automation degree, low in operation cost, capable of meeting sustainable development requirements, and widely applicable to the actual industrial production process.

As shown in fig. 2, the present invention further provides a withdrawal system applied to the rectifying tower, which comprises a heating unit 20, the automatic separation and stratification unit 10, the condensing unit 90, the pressure control unit 30 and the withdrawal unit 40; the heating unit 20 is connected with the rectifying tower 50, the first discharging interface 15 is connected with the rectifying tower 50, the condensing unit 90 is respectively connected with the rectifying tower 50 and the feeding interface 14, the pressure control unit 30 is connected with the condensing unit 90, and the extracting unit 40 is connected with the second discharging interface 16.

Specifically, the utility model discloses be applied to the extraction system of rectifying column when using, through about-0.07 Mpa of the 50 operating pressure of pressure control unit 30 control rectifying column, the last charging and discharging pipeline that has set up of rectifying column 50, the raw materials gets into in the rectifying column 50 tower from charging and discharging pipeline, it rises to rectifying column 50 packing layer to heat the vaporization at the bottom of rectifying column 50 by heating unit 20, temperature control is 105-115 ℃ at the bottom of the tower, heating unit 20 temperature control is about 130 ℃, the top of the tower temperature is about 55 ℃, the preferential azeotropic mixture that forms of rectification in-process toluene and water is at the top of the tower enrichment, through the condenser condensation after from feeding interface 14 inflow first material district 17, accomplish the separation through autosegregation layering unit 10, the material after the separation flows back to rectifying column 50 from first ejection of compact interface 15 respectively, through extraction unit 40 follows second ejection of compact interface 16 and picks. Preferably, the rectifying tower 50 is connected with the first discharging interface 15 through a connecting interface, and the height of the first discharging interface 15 is greater than that of the connecting interface, so that the separated material can automatically flow back under the action of gravity.

In the present embodiment, the heating unit 20 includes a reboiler, a steam pipe, and a steam regulating valve; the reboiler is connected with rectifying column 50, and the steam conduit is connected with the reboiler, and the steam control valve sets up on the steam conduit. Specifically, the reboiler is connected with outside fresh steam through the steam conduit and heats the material in rectifying column 50 to steam flow is controlled through the steam control valve that sets up on the steam conduit, make reboiler steam temperature control about 130 ℃.

In the present embodiment, the condensing unit 90 includes a condenser.

In the present embodiment, the pressure control unit 30 includes a vacuum separation tank and a vacuum pump; the vacuum separation tank is connected with the condenser, and the vacuum pump is connected with the vacuum separation pump. When the automatic separation and lamination unit is used, the vacuum control unit controls the pressure from negative pressure to normal pressure according to the requirement so as to convey the materials from the rectifying tower 50 to the automatic separation and lamination unit 10.

In the present embodiment, the production unit 40 includes a production tank and a discharge pump; the production tank is connected with a second discharging interface 16, and the discharging pump is connected with the production tank.

In this embodiment, the production system further comprises a reflux flow meter 60; the reflux flowmeter 60 is disposed on the connecting flow channel of the first discharging connector 15 and the rectifying tower 50. The reflux flow meter 60 is used to meter the flow of the reflux material.

In this embodiment, the production system further comprises a production flow meter 70 and a production regulating valve 80; the production flowmeter 70 and the production regulating valve 80 are respectively arranged on a connecting flow passage of the production unit 40 and the second discharging interface 16. Specifically, the extraction flow meter 70 is used for measuring the flow of the extracted material, and then the reflux ratio of the rectifying tower 50 can be ensured to be about 95kg/h about the average flow of the extraction flow meter 70, about 190kg/L about the average value of the reflux flow meter 60, about 99.7 percent of the test water content, about 0.2 percent of the toluene content, and trace butyl propionate and N-methyl pyrrolidone by controlling an extraction valve.

It will be appreciated that the tank 11 of the automated separation and stratification unit 10 should have a relatively large volume to ensure separation time, in one example, a tank 11 volume of 2m ³ 。

In this embodiment, an extraction system applied to a distillation column is exemplified by distillation and dehydration of an impurity solvent; the hybrid solvent comprises 51% of butyl propionate, 35% of N-methyl pyrrolidone, 6% of toluene and 8% of water, the production requires removing water in the hybrid solvent for solvent takeout treatment, and the content of organic solvent in the distilled water is less than 1%; the device is operated under negative pressure, the feeding temperature is 30 ℃, and the feeding amount is 1t/h.

The operation parameters of the extraction system applied to the rectifying tower in the embodiment are shown in table 1.

TABLE 1 operating parameters

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and these embodiments are still within the scope of the invention.

Claims

1. An automatic separation and layering unit is characterized by comprising a tank body, wherein the tank body is provided with a first baffle, a second baffle, a feeding interface, a first discharging interface and a second discharging interface;

the first baffle and the second baffle are positioned in the tank body and are limited with the tank body to form a first material area, a second material area and a third material area, the upper side of the first material area is communicated with the upper side of the second material area, the lower side of the second material area is communicated with the lower side of the third material area, the feeding interface is communicated with the first material area, the first discharging interface is communicated with the upper side of the third material area, and the second discharging interface is communicated with the lower end of the third material area.

2. The self-separating lamination unit of claim 1 wherein the first baffle is vertically disposed.

3. A withdrawal system applied to a rectifying tower, which is characterized by comprising a heating unit, an automatic separation and stratification unit, a condensation unit, a pressure control unit and a withdrawal unit, wherein the automatic separation and stratification unit is defined in any one of claims 1-2;

the heating unit is connected with the rectifying tower, the first discharging interface is connected with the rectifying tower, the condensing unit is respectively connected with the rectifying tower and the feeding interface, the pressure control unit is connected with the condensing unit, and the extracting unit is connected with the second discharging interface.

4. The extraction system applied to the rectifying tower is characterized in that the heating unit comprises a reboiler, a steam pipeline and a steam regulating valve;

the reboiler with the rectifying column is connected, the steam conduit with the reboiler is connected, steam control valve sets up on the steam conduit.

5. The extraction system applied to the rectifying tower according to claim 3, wherein the condensing unit comprises a condenser.

6. The extraction system applied to the rectifying tower is characterized in that the pressure control unit comprises a vacuum separation tank and a vacuum pump;

the vacuum separation tank is connected with the condenser, and the vacuum pump is connected with the vacuum separation pump.

7. The extraction system applied to the rectifying tower, according to claim 3, characterized in that the extraction unit comprises an extraction tank and a discharge pump;

the production tank is connected with the second discharging interface, and the discharging pump is connected with the production tank.

8. The production system applied to the rectifying tower, according to claim 3, is characterized by further comprising a production flow meter and a production regulating valve;

the production flowmeter and the production regulating valve are respectively arranged on a connecting flow passage of the production unit and the second discharging interface.

9. The extraction system applied to the rectifying tower, according to claim 3, further comprising a reflux flow meter;

the reflux flow meter is arranged on a connecting flow channel of the first discharging interface and the rectifying tower.

10. The extraction system applied to the rectifying tower according to claim 3, wherein the rectifying tower is connected with the first discharging interface through a connecting interface, and the height of the first discharging interface is greater than that of the connecting interface.