CN107715487B - Device and method for separating immiscible liquids - Google Patents

Device and method for separating immiscible liquids Download PDF

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Publication number
CN107715487B
CN107715487B CN201711130863.0A CN201711130863A CN107715487B CN 107715487 B CN107715487 B CN 107715487B CN 201711130863 A CN201711130863 A CN 201711130863A CN 107715487 B CN107715487 B CN 107715487B
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China
Prior art keywords
solvent
receiving tank
liquid receiving
liquid
baffle
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CN201711130863.0A
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Chinese (zh)
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CN107715487A (en
Inventor
许兵
庞博湛
叶强
李海平
孙春光
毕作鹏
熊昌武
孙东辉
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Rianlon Corp
Rianlon Zhongwei new Material Co ltd
Rianlon Zhuhai New Material Co ltd
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Rianlon Corp
Rianlon Zhongwei new Material Co ltd
Rianlon Zhuhai New Material Co ltd
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Priority to CN201711130863.0A priority Critical patent/CN107715487B/en
Publication of CN107715487A publication Critical patent/CN107715487A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D3/00Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/02Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in boilers or stills
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D17/00Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/005Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion by thermal diffusion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D17/00Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02Separation of non-miscible liquids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50Mixing liquids with solids

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

The invention provides a device and a method for separating immiscible liquid, comprising a liquid receiving tank, wherein a baffle plate which is vertically arranged is arranged in the liquid receiving tank and is fixed on the inner walls of two opposite sides of the liquid receiving tank, two sides of the baffle plate in the width direction are in sealing connection with two inner side walls of the liquid receiving tank, the baffle plate divides the inner space of the liquid receiving tank into a large space and a small space, a top notch and a bottom notch are respectively reserved between the two sides of the baffle plate in the length direction and the top and the bottom, the top notch and the bottom notch are respectively communicated with the large space and the small space, a backflow port is arranged on the side wall of the liquid receiving tank at the small space, and a liquid inlet is arranged at the top of the liquid receiving tank at the large space. According to the invention, no person is required to go to the site for liquid separation in the primary distillation process, and only one liquid separation is required to be carried out when the process is finished, so that the personnel cost is greatly saved, and the process is simplified.

Description

Device and method for separating immiscible liquids
Technical Field
The invention belongs to the technical field of chemical industry, and particularly relates to a device for separating immiscible liquids and a method for separating residual solvents in solid materials.
Background
In chemical production, the following separation problems are often encountered: separating certain harmful solvents contained in the solid material. The conventional separation method is as follows: adding harmless second solvent into the solid, mixing uniformly, distilling (solid product, harmful solvent, and harmless solvent are mutually incompatible), boiling the two solvents together, distilling out from the kettle, condensing the two solvents into a liquid receiving tank by a condenser, separating the harmful solvent by utilizing the mutually incompatible property of the two solvents, and returning the harmless solvent into the kettle.
If the conventional operation method is used, the harmful solvent and the harmless solvent can only be distilled out and enter a liquid receiving tank, after layering the harmful solvent and the harmless solvent in the liquid receiving tank, the harmless solvent is pumped into the distillation kettle by a conveying pump, or the liquid receiving tank is placed at a higher position, the harmless solvent is separated into the distillation kettle, and the two conditions are controlled so that the harmless solvent does not enter the distillation kettle. Since it is necessary to manually judge the liquid level boundary and control the valve, continuous operation cannot be achieved.
In addition, the conventional method in the prior art has the defects of complicated operation process, multiple use of one pump or high liquid receiving tank, and frequent operation and poor control.
Disclosure of Invention
In view of the above, a first object of the present invention is to provide a device for separating immiscible liquids, which solves the above-mentioned problems.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the utility model provides a device of separation insoluble liquid, including connecing the fluid reservoir, the inside of connecing the fluid reservoir is provided with the baffle of vertical setting, the baffle is fixed on connecing the relative both sides inner wall of fluid reservoir, the both sides of the width direction of baffle and the two inside walls sealing connection who connect the fluid reservoir, the baffle will connect the inner space of fluid reservoir to cut apart into big space and little space, leave top breach and bottom breach between the both sides of the length direction of baffle and top and bottom respectively, top breach and bottom breach are with big space and little space intercommunication respectively, be provided with the backward flow mouth on the lateral wall of the fluid reservoir that connects of little space department, the top of the fluid reservoir that connects of big space department is provided with the inlet.
Further, the volume of the liquid receiving tank of the straight barrel section at the baffle in the large space is larger than the volume of the solvent to be separated in the one-time liquid separation operation process.
Further, the height of the reflux port from the bottom of the baffle plate is (ρ1++ρ2). Times.L; wherein ρ1 is the density of the first solvent to be separated remaining in the solid material, ρ2 is the density of the second solvent for separating the first solvent, L is the total length of the baffle plate, ρ2 is greater than ρ1.
Further, the reflux mouth is communicated with the inlet of the distillation still, the outlet of the distillation still is connected with the inlet of the condenser, and the outlet of the condenser is communicated with the liquid inlet of the liquid receiving tank.
Further, a first bent pipe and a first observation mirror are arranged on a pipeline between the reflux port and the distillation still, and a second bent pipe and a second observation mirror are arranged on a pipeline between the condenser and the liquid inlet.
Further, the distillation still is connected with the liquid receiving tank through a condenser, and the condenser is positioned above the distillation still and the liquid receiving tank.
Further, the condenser is arranged in an inclined manner, and one end of the condenser close to the distillation kettle is higher than the other end of the condenser.
Further, both sides of the baffle in the length direction are close to the top and the bottom, respectively.
It is a second object of the present invention to provide the use of any of the above-described apparatus for separating immiscible liquids for separating residual solvent from a solid material.
Wherein the residual solvent in the solid material is essentially a hazardous solvent.
A third object of the present invention is to provide a method for separating residual solvent from a solid material, preferably by using any one of the above-mentioned apparatuses, the specific separation method comprising the steps of:
s1: adding a solid material containing a first solvent into a distillation kettle, and then adding a second solvent which has a density greater than that of the first solvent and is insoluble in both the first solvent and the solid material into the distillation kettle;
s2: adding a second solvent into the liquid receiving tank;
s3: and starting distillation, wherein in the distillation process, the mixture of the distilled first solvent and the distilled second solvent enters a large space after being condensed by a condenser, and when the liquid level of the second solvent in the small space reaches a reflux port, the second solvent flows back to the distillation kettle, and the first solvent is left in the large space, so that separation is realized.
Further, in S2, the amount of the second solvent added is preferably just enough to go through the bottom notch.
Compared with the prior art, the invention has the following advantages:
(1) According to the invention, manual on-site liquid separation is not needed in the primary distillation process, and only one-time liquid separation is needed when the process is finished, so that the personnel cost is greatly saved, and the process is simplified;
(2) The baffle plate effectively prevents the solvent (such as harmful solvent) to be separated from entering the distillation still again, so that the separation is more thorough, and the production efficiency is higher.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a distillation system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a distillation system in the prior art.
Reference numerals illustrate:
1. a liquid receiving tank; 11. a baffle; 12. a return port; 13. a liquid inlet; 14. a bottom notch; 15. a top notch; 16. a small space; 17. large space; 18. a top; 19. a bottom; 2. a distillation still; 3. a condenser; 4. a first elbow; 5. a first viewing mirror; 6. a second elbow; 7. a second viewing mirror; 8. a third viewing mirror; 9. and a transfer pump.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in FIG. 1, a device for separating immiscible liquids comprises a liquid receiving tank 1, wherein a baffle plate 11 is vertically arranged in the liquid receiving tank 1, two sides of the baffle plate 11 in the width direction are respectively fixed on the inner walls of two opposite sides of the liquid receiving tank 1, and two sides of the baffle plate 11 in the width direction are in sealing connection with two inner side walls of the liquid receiving tank 1. The baffle 11 divides the internal space of the liquid receiving tank 1 into a large space 17 and a small space 16. The two sides of the baffle 11 in the length direction extend towards the top 18 and the bottom 19 of the liquid receiving tank 1 respectively and are close to the top 18 and the bottom 19 but not contacted with the top 18 and the bottom 19, and a top notch 15 and a bottom notch 14 are reserved between the two sides of the baffle 11 in the length direction and the top 18 and the bottom 19 respectively. The top notch 15 and the bottom notch 14 communicate the large space 17 and the small space 16, respectively.
As shown in fig. 1, the return port 12 is provided on the side wall of the liquid receiving tank 1 at the small space 16, and the liquid inlet port 13 is provided at the top 18 at the large space 17. The volume of the liquid receiving tank 1 and the specific installation position of the baffle 11 need to be calculated, and the volume of the first solvent to be separated in one liquid separating operation process should be smaller than the volume of the liquid receiving tank 1 of the straight barrel section at the baffle 11 in the large space 17. The calculation formula of the installation height of the return orifice 12 is: distance of optimum mounting height from bottom of baffle 11= (density of first solvent/density of second solvent) ×total length of baffle 11.
As shown in fig. 2, the reflux port 12 is communicated with the inlet of the distillation still 2, the outlet of the distillation still 2 is connected with the inlet of the condenser 3, and the outlet of the condenser 3 is communicated with the liquid inlet 13 of the liquid receiving tank 1. A first bent pipe 4 and a first observation mirror 5 are arranged on the pipeline between the reflux port 12 and the distillation kettle 2, the first bent pipe 4 is used for preventing reflux, and the first observation mirror 5 is used for observing the condition of the pipeline. A second elbow pipe 6 and a second observation mirror 7 are arranged on the pipeline between the condenser 3 and the liquid inlet 13, the second elbow pipe 6 is used for preventing backflow, and the second observation mirror 7 is used for observing the condition of the pipeline. The condenser 3 is located the top of stills 2 and liquid receiving pot 1, and condenser 3 slope sets up, and the import of condenser 3 is higher than the export of condenser 3. A third sight glass 8 is provided on the pipe of the bottom 19 which communicates with the container through a valve.
As shown in fig. 3, the lower end of the liquid receiving tank 1 in the prior art is communicated with the inlet of the distillation still 2 through a delivery pump 9. The working principle in the prior art is as follows: the first solvent and the second solvent can only be distilled out and enter one liquid receiving tank 1, after the first solvent and the second solvent are layered in the liquid receiving tank 1, the second solvent is pumped into the distillation kettle 2 by a conveying pump 9, or the liquid receiving tank 1 is placed at a higher position, the second solvent is separated into the distillation kettle 2, and the first solvent is controlled not to enter the distillation kettle 2 in both cases. Continuous operation cannot be achieved because of the need to manually judge the page boundaries and control the valves.
The invention also provides a separation method of the immiscible liquids, comprising the following steps:
s1: adding a solid material containing a first solvent into the distillation kettle 2, and then adding a second solvent which has a density greater than that of the first solvent and is insoluble in both the first solvent and the solid material into the distillation kettle 2;
s2: adding a second solvent to the liquid receiving tank 1 so that the second solvent just passes through the bottom notch 14;
s3: in the distillation process, the mixture of the distilled first solvent and the distilled second solvent enters the large space 17 after being condensed by the condenser 3, and when the liquid level of the second solvent in the small space 16 reaches the reflux port 12, the second solvent flows back to the distillation kettle 2, and the first solvent is left in the large space 17, so that the separation is realized.
The working principle of the invention is as follows: the volume of the liquid receiving tank 1 is calculated according to the volume of the separated solvent, a small amount of second solvent is added into the liquid receiving tank 1 before distillation, and the liquid level of the second solvent is optimal to just exceed the bottom notch 14. The reflux port 12 is connected with the distillation kettle 2, condensate distilled from the first solvent and the second solvent enters a large space 17, the first solvent and the second solvent are layered in the liquid receiving tank 1, and the second solvent enters the distillation kettle 2 from the bottom of the baffle 11 to the reflux port 12 along with the rising of the liquid level, so that the first solvent is left on the right side of the baffle 11. Thus, the first solvent can be left in the large space 17 of the liquid receiving tank 1, and the second solvent can flow back into the distillation kettle 2, so that the first solvent can be separated, continuous operation can be realized, manual operation is not needed, and the first solvent in the liquid receiving tank 1 can be separated after one period is finished.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (6)

1. A device for separating immiscible liquids, characterized by:
the device comprises a liquid receiving tank (1), wherein a baffle (11) which is vertically arranged is arranged in the liquid receiving tank (1), the baffle (11) is fixed on the inner walls of two opposite sides of the liquid receiving tank (1), two sides of the width direction of the baffle (11) are in sealing connection with two inner side walls of the liquid receiving tank (1), the baffle (11) divides the inner space of the liquid receiving tank (1) into a large space (17) and a small space (16), a top notch (15) and a bottom notch (14) are reserved between two sides of the length direction of the baffle (11) and the top (18) and the bottom (19) respectively, the top notch (15) and the bottom notch (14) are respectively communicated with the large space (17) and the small space (16), a return port (12) is arranged on the side wall of the liquid receiving tank (1) at the small space (16), and a liquid inlet (13) is formed in the top (18) of the liquid receiving tank (1) at the large space (17).
The volume of the liquid receiving tank (1) of the straight barrel section at the baffle (11) in the large space (17) is larger than the volume of the solvent to be separated in the one-time liquid separation operation process; the height of the return opening (12) from the bottom of the baffle plate (11) is (ρ1) +ρ2) +L; wherein ρ1 is the density of the first solvent to be separated remaining in the solid material, ρ2 is the density of the second solvent for separating the first solvent, L is the total length of the baffle (11), ρ2 is greater than ρ1; the reflux port (12) is communicated with the inlet of the distillation kettle (2), the outlet of the distillation kettle (2) is connected with the inlet of the condenser (3), and the outlet of the condenser (3) is communicated with the liquid inlet (13) of the liquid receiving tank (1); a first bent pipe (4) and a first observation mirror (5) are arranged on a pipeline between the reflux port (12) and the distillation kettle (2); and/or a second bent pipe (6) and a second observation mirror (7) are arranged on the pipeline between the condenser (3) and the liquid inlet (13).
2. The apparatus for separating immiscible liquids as claimed in claim 1 wherein:
the distillation still (2) is connected with the liquid receiving tank (1) through a condenser (3), and the condenser (3) is positioned above the distillation still (2) and the liquid receiving tank (1).
3. The apparatus for separating immiscible liquids as claimed in claim 1 wherein:
both sides of the baffle plate (11) in the length direction are respectively close to the top (18) and the bottom (19).
4. Use of a device for separating immiscible liquids as claimed in any of claims 1-3 for separating residual solvents in a solid material.
5. A method for separating residual solvent from a solid material using the apparatus for separating immiscible liquids as claimed in any one of claims 1 to 3, comprising the steps of:
s1: adding a solid material containing a first solvent into the distillation kettle (2), and then adding a second solvent which has a density greater than that of the first solvent and is insoluble in both the first solvent and the solid material into the distillation kettle (2);
s2: adding a second solvent into the liquid receiving tank (1);
s3: and in the distillation process, the mixture of the distilled first solvent and the distilled second solvent enters a large space (17) after being condensed by a condenser (3), and when the liquid level of the second solvent in the small space (16) reaches a reflux port (12), the second solvent flows back to the distillation kettle (2), and the first solvent is left in the large space (17), so that separation is realized.
6. The method according to claim 5, wherein:
in S2, the addition amount of the second solvent is optimal to just go over the bottom notch (14).
CN201711130863.0A 2017-11-15 2017-11-15 Device and method for separating immiscible liquids Active CN107715487B (en)

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CN113082780B (en) * 2021-03-01 2022-08-16 南京诺奥新材料有限公司 Alcohol ester separation device for alcohol ester mixture and separation method thereof
CN116212422B (en) * 2023-05-10 2023-07-25 利安隆(天津)制药有限公司 Distillation equipment and distillation system with same

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