Integrated pervaporation and ultra-infiltration membrane separation system

Abstract

The invention provides an integrated pervaporation and ultra-infiltration membrane separation system, and relates to the technical field of membrane separation. The system comprises a feed liquid tank, the feed liquid side of the pervaporation membrane component is communicated with a feed liquid tank through a first feed liquid pump; the condensation unit is communicated with the membrane permeation side of the pervaporation membrane assembly through a vacuum pump; the hot purging unit is communicated with a material cavity in the condensing unit; the phase splitter is communicated with the condensation unit, and condensate in the condensation unit is conveyed into the phase splitter through the hot purging unit; and the ultra-infiltration membrane unit is communicated with an outlet of the phase splitter and is communicated with the feed liquid tank through a second feed liquid pump. According to the system, pervaporation membrane separation and ultra-infiltration membrane separation are integrated into one system, different separation unit modules can be combined in sequence according to process requirements, the requirements of different separation systems can be met, meanwhile, the equipment is simple and attractive, convenient to move, high in automation degree and easy to operate, and the use requirements of scientific research and technicians are met.

Description

Technical Field

[0001] The invention relates to the technical field of membrane separation, and in particular to an integrated pervaporation and super-wetting membrane separation system. Background Art

[0002] Pervaporation has obvious technical and economic advantages in removing trace water from organic solvents and mixed solvents, separating and recovering small amounts of organic matter in wastewater, and separating near-boiling point and constant boiling point organic mixture solutions; superwetting membranes utilize the difference in wettability of components in the liquid mixture on the membrane surface to selectively permeate components with super affinity on the membrane surface, thereby separating the liquid mixture; superwetting separation membranes have the advantages of long separation life, large flux, high separation efficiency, and low energy consumption; however, when faced with some special separation systems, a single pervaporation or superwetting membrane separation system cannot achieve the separation goal and cannot meet the needs of scientific research and technical personnel, which greatly limits the application and promotion of integrated technology.

[0003] Therefore, there is an urgent need for a pervaporation and superwetting membrane integrated separation system that can improve the separation effect and meet usage requirements. Summary of the invention

[0004] The purpose of the present invention is to provide an integrated pervaporation and super-wetting membrane separation system, which solves the technical problem that the prior art cannot achieve the separation target when dealing with some special separation systems and cannot meet the needs of scientific research and technical personnel. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides an integrated pervaporation and super-wetting membrane separation system, comprising:

[0007] Liquid tank;

[0008] A pervaporation membrane assembly, wherein the feed liquid side of the pervaporation membrane assembly is connected to the feed liquid tank via a first feed liquid pump;

[0009] A condensing unit, wherein the condensing unit is connected to the membrane permeation side of the pervaporation membrane module through a vacuum pump;

[0010] A heat purge unit, the heat purge unit is connected to the material cavity in the condensing unit;

[0011] A phase separator, the phase separator is connected to the condensing unit, and the condensate in the condensing unit is transported to the phase separator through the hot purge unit;

[0012] A super wetted membrane unit is connected to the outlet of the phase separator and is connected to the feed liquid tank through a second feed liquid pump.

[0013] Preferably, the condensing unit comprises:

[0014] The first condenser and the second condenser, the first condenser or the second condenser is connected to the membrane permeation side of the pervaporation membrane assembly through the vacuum pump, and the condensate in the first condenser or the second condenser is transported to the phase separator through the hot purge unit.

[0015] Preferably, it also includes:

[0016] a first three-way valve, through which the heat sweep unit and the membrane permeation side of the pervaporation membrane module are respectively connected to the first condenser;

[0017] A second three-way valve, through which the heat sweep unit and the membrane permeation side of the pervaporation membrane assembly are respectively connected to the second condenser.

[0018] Preferably, it also includes:

[0019] A collecting tank, wherein the liquid outlet side of the collecting tank is connected to the liquid inlet side of the phase separator, the liquid inlet side of the collecting tank is connected to the liquid outlet side of the first condenser through a fourth valve, and the liquid inlet side of the collecting tank is connected to the liquid outlet side of the second condenser through a fifth valve.

[0020] Preferably, the superwetting membrane unit comprises:

[0021] The first superwet membrane assembly and the second superwet membrane assembly are connected to the liquid outlet side of the phase separator respectively, and the liquid outlet sides of the first superwet membrane assembly and the second superwet membrane assembly are connected to the second liquid pump respectively.

[0022] Preferably, it also includes:

[0023] a third three-way valve, the third three-way valve being connected between the liquid outlet side of the first superwet membrane assembly and the second liquid pump;

[0024] A fourth three-way valve is connected between the liquid outlet side of the second super wettable membrane assembly and the second liquid pump.

[0025] Preferably, the thermal purge unit comprises:

[0026] A nitrogen compression tank, which is connected to the first three-way valve and the second three-way valve through a nitrogen valve;

[0027] A heater is connected between the nitrogen valve and the first three-way valve and the second three-way valve.

[0028] Preferably, it also includes:

[0029] A fifth three-way valve is connected between the first feed liquid pump and the feed liquid side of the pervaporation membrane module.

[0030] Preferably, it also includes:

[0031] A feed valve is connected to the liquid inlet side of the phase separator.

[0032] Preferably, it also includes:

[0033] A sixth valve is connected between the collecting tank and the phase separator.

[0034] In the technical solution provided by the present invention, if the super-wetting membrane unit is separated in the first order, the raw material and the induced phase separation agent are added to the phase separator, the material is selectively permeated through the super-wetting membrane unit, and the material is transported to the feed tank through the second feed pump, and then the material in the feed tank is input into the pervaporation membrane assembly through the first feed pump, and the permeation steam on the permeation side of the pervaporation membrane assembly is transported to the condensation unit under the vacuum action of the vacuum pump and then collected. If the pervaporation membrane assembly is in the first order, the raw material in the feed tank is transported to the pervaporation membrane assembly through the first feed pump, and under the action of the vacuum pump, the steam on the permeation side of the pervaporation membrane assembly is transported to the condensation unit for condensation, the solid material is melted by the hot purge unit, and all the feed liquid is blown to the phase separator, and after the induced phase separation agent is added to the phase separator, the feed liquid is selectively permeated through the super-wetting membrane unit, and then collected. Among them, the feed liquid on the feed liquid side of the pervaporation membrane assembly is circulated between the feed liquid tank and the first feed pump. On the whole, the present application integrates pervaporation membrane separation and superwetting membrane separation into a system. Different separation unit modules can be combined in sequence according to process requirements to meet the needs of different separation systems. At the same time, the equipment is simple and beautiful, easy to move, highly automated and easy to operate, meeting the needs of scientific research and technical personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a schematic diagram of the overall connection of the present invention.

[0037] In the figure, 1-liquid tank; 2-first valve; 3-first liquid pump; 4-permeation vaporization membrane assembly; 5-first three-way valve; 6-second three-way valve; 7-second valve; 8-third valve; 9-first condenser; 10-second condenser; 11-regulating valve; 12-vacuum pump; 13-fourth valve; 14-fifth valve; 15-collecting tank; 16-sixth valve; 17-phase separator; 18-first super-wet membrane assembly; 19-second super-wet membrane assembly; 20-third three-way valve; 21-fourth three-way valve; 22-second liquid pump; 23-first pressure relief valve; 24-second pressure relief valve; 25-filter tank; 26-nitrogen valve; 27-feed valve; 28-fifth three-way valve. DETAILED DESCRIPTION

[0038] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0039] refer to Figure 1 A specific embodiment of the present invention provides an integrated pervaporation and superwetting membrane separation system, comprising:

[0040] Liquid tank 1;

[0041] A pervaporation membrane assembly 4, wherein the liquid side of the pervaporation membrane assembly 4 is connected to the liquid outlet side and the liquid inlet side of the liquid tank 1 through a first liquid pump 3;

[0042] A condensation unit, which is connected to the membrane permeation side of the pervaporation membrane assembly 4 through a vacuum pump 12; a regulating valve 11 is connected to the negative pressure side of the vacuum pump 12;

[0043] A heat purge unit, the heat purge unit is connected to the material cavity in the condensation unit;

[0044] A phase separator 17, the phase separator 17 is connected to the condensing unit, and the condensate in the condensing unit is transported to the phase separator 17 through the hot purge unit; the phase separator 17 is connected to the second pressure relief valve 24;

[0045] The super-wet membrane unit is connected to the outlet of the phase separator 17 and is connected to the feed liquid tank 1 through the second feed liquid pump 22 .

[0046] When facing some special separation systems, a single pervaporation or superwetting membrane separation system cannot achieve the separation target, cannot meet the use needs of scientific research and technical personnel, and greatly limits the application and promotion of integrated technology. In this application, if the superwetting membrane unit separation order is first, the raw material and the induced phase separation agent are added to the phase separator 17, the material is selectively permeated through the superwetting membrane unit, and the material is transported to the feed tank 1 through the second feed pump 22, and then the material in the feed tank 1 is input into the pervaporation membrane assembly 4 through the first feed pump 3. Under the vacuum action of the vacuum pump 12, the permeation steam on the permeation side of the pervaporation membrane assembly 4 is transported to the condensation unit and collected. If the pervaporation membrane assembly is in the first order, the raw material in the feed tank 1 is transported to the pervaporation membrane assembly 4 through the first feed pump 3. Under the action of the vacuum pump 12, the steam on the membrane permeation side of the pervaporation membrane assembly 4 is transported to the condensation unit for condensation, the solid material is melted by the heat purge unit, and all the feed liquid is blown to the phase separator 17. After the induction phase separation agent is added to the phase separator 17, the feed liquid is selectively permeated through the super-wetting membrane unit and then collected. Among them, the feed liquid on the feed liquid side of the pervaporation membrane assembly 4 circulates between the feed tank 1 through the first feed pump 3. On the whole, the present application integrates pervaporation membrane separation and super-wetting membrane separation into a system. Different separation unit modules can be combined in sequence according to process requirements to meet the needs of different separation systems. At the same time, the equipment is simple and beautiful, easy to move, highly automated and easy to operate, meeting the needs of scientific research and technical personnel.

[0047] To further optimize the solution, the condensing unit includes:

[0048] The first condenser 9 and the second condenser 10 are connected to the membrane permeation side of the pervaporation membrane module 4 through a vacuum pump 12, and the condensate in the first condenser 9 or the second condenser 10 is transported to the phase separator 17 through a hot purge unit. The first condenser 9 and the second condenser 10 are refrigerated by a low-temperature circulation tank or liquid nitrogen.

[0049] In order to ensure the continuity with the subsequent separation process, the condenser is set in two parallel ways. During operation, the A-way condensation is first opened. At this time, the pipeline connecting the pervaporation membrane assembly 4 to the first condenser 9 and the pipeline connecting the second condenser 10 are closed. When the condensation product of the first condenser 9 of the A-way reaches a certain amount, the second condenser 10 is opened and the A-way is closed. The condensate in the first condenser 9 is melted by the hot purge unit and sent to the phase separator 17.

[0050] Further optimization plans also include:

[0051] The first three-way valve 5, the membrane permeation side of the heat sweep unit and the pervaporation membrane assembly 4 are respectively connected to the first condenser 9 through the first three-way valve 5;

[0052] The second three-way valve 6 , the heat sweep unit, and the membrane permeation side of the pervaporation membrane assembly 4 are connected to the second condenser 10 through the second three-way valve 6 .

[0053] Further optimization plans also include:

[0054] The collecting tank 15, the liquid outlet side of the collecting tank 15 is connected to the liquid inlet side of the phase separator 17, the liquid inlet side of the collecting tank 15 is connected to the liquid outlet side of the first condenser 9 through the fourth valve 13, and the liquid inlet side of the collecting tank 15 is connected to the liquid outlet side of the second condenser 10 through the fifth valve 14; the collecting tank 15 is connected to the first pressure relief valve 23.

[0055] To further optimize the solution, the super-wet membrane unit includes:

[0056] The first superwet membrane assembly 18 and the second superwet membrane assembly 19 are connected at the liquid outlet side of the phase separator 17, and the liquid outlet sides of the first superwet membrane assembly 18 and the second superwet membrane assembly 19 are connected to the second liquid pump 22 respectively.

[0057] Further optimization plans also include:

[0058] A third three-way valve 20, the third three-way valve 20 is connected between the liquid outlet side of the first superwet membrane assembly 18 and the second liquid pump 22;

[0059] The fourth three-way valve 21 is connected between the liquid outlet side of the second superwet membrane assembly 19 and the second liquid pump 22 .

[0060] To further optimize the solution, the hot purge unit includes:

[0061] A nitrogen compression tank, which is connected to the first three-way valve 5 and the second three-way valve 6 through a nitrogen valve 26;

[0062] The heater is connected between the nitrogen valve 26 and the first three-way valve 5 and the second three-way valve 6.

[0063] Further optimization plans also include:

[0064] The fifth three-way valve 28 is connected between the first feed liquid pump 3 and the feed liquid side of the pervaporation membrane module 4 .

[0065] Further optimization plans also include:

[0066] A feed valve 27 is connected to the liquid inlet side of the phase separator 17 .

[0067] Further optimization plans also include:

[0068] The sixth valve 16 is connected between the collecting tank 15 and the phase separator 17 .

[0069] Further optimization plans also include:

[0070] The filter tank 25 , the phase separator 17 is connected to the filter tank 25 through the second pressure relief valve 24 , and the collection tank 15 is connected to the filter tank 25 through the first pressure relief valve 23 .

[0071] The control system of the present application is integrated in the control cabinet, which is an electrostatic spraying stand with movable brake casters, which can be moved or braked; all operations can be performed directly in the control cabinet. The flow rate of the liquid can be adjusted by changing the pump speed; temperature and pressure measuring points are set before and after the membrane, and the device can automatically measure the temperature of each liquid and the pressure before the permeation side and the vacuum degree after the permeation side.

[0072] Example 1

[0073] The material system is a 1.5wt% butanol solution, and the butanol in the water is separated and recovered. An integrated method of pervaporation followed by superwetting membrane separation is adopted. In the integrated device, the raw material is introduced into the feed liquid tank 1 and heated to 40°C, and then the first valve 2 is opened. The feed liquid is transported to the pervaporation membrane assembly 4 by the first feed liquid pump 3, and circulates between the upstream side of the membrane and the feed liquid tank 1, and the flow rate is controlled at 40L / h. The pervaporation membrane assembly 4 adopts an organic pervaporation membrane. Turn on the vacuum pump 12 and adjust the regulating valve 11 to control the permeation pressure at 1000Pa. The temperature of the first condenser 9 and the second condenser 10 is controlled at -20°C. First open the A line (first condenser 9) for condensation. At this time, the first three-way valve 5 opens the pipeline from the pervaporation membrane assembly 4 to the first condenser 9, the second valve 7 is opened, and the second three-way valve 6, the third valve 8, the fourth valve 13, and the fifth valve 14 are closed. When the condensation product of A road reaches a certain amount, the first condenser 9 of A road is closed, and the second condenser 10 of B road is opened. The system automatically adjusts the first three-way valve 5, the second three-way valve 6, closes the second valve 7, opens the third valve 8, and the fourth valve 13, and completes the switching work of A and B road condensers to ensure the continuous operation of the equipment. The nitrogen valve 26 is opened, and the nitrogen enters the condensate in the first condenser 9 through the heater to enter the collection tank 15, and the first pressure relief valve 23 is opened. After the purge is completed, the first pressure relief valve 23 and the nitrogen valve 26 are closed. Butanol accounts for 35wt% in the product obtained by the collection tank 15. The sixth valve 16 of the outlet of the collection tank 15 is opened, so that the PV product enters the phase separator 17, and the feed valve 27 is opened to add the strengthening phase separation agent potassium carbonate and stir, and the second super-wetting membrane assembly 19 is equipped with a super-hydrophobic / underwater super-oleophilic film, and the first super-wetting membrane assembly 18 is equipped with a super-hydrophilic / underwater super-oleophobic film. The fourth three-way valve 21 is opened to discharge the pipe, and a butanol product of >99 wt% is obtained. The phase separator 17 is connected to a second pressure relief valve 24, and the agitator in the phase separator 17 opens the second pressure relief valve 24 during the stirring process; and closes the pressure relief valve 24 after the stirring stops.

[0074] Example 2

[0075] The material system is wastewater containing ethyl acetate (concentration is about 1wt%), and the ethyl acetate in the water is separated and recovered. An integrated method of pervaporation first and then super-wetting membrane separation is adopted. In the integrated device, the raw material is introduced into the feed liquid tank 1 and heated to 60°C, and then the first valve 2 is opened. The feed liquid is transported to the pervaporation membrane assembly 4 by the first feed liquid pump 3, and circulates between the upstream side of the membrane and the feed liquid tank 1, and the flow rate is controlled at 50L / h. The pervaporation membrane assembly 4 adopts an organic pervaporation membrane. Turn on the vacuum pump 12 and adjust the regulating valve 11 to control the permeation pressure at 500Pa. The temperature of the first condenser 9 and the second condenser 10 is controlled at -15°C. First, open the A-way condensation. At this time, the first three-way valve 5 opens the pipeline from the pervaporation membrane assembly 4 to the condenser 9, the second valve 7 is opened, and the second three-way valve 6, the third valve 8, the fourth valve 13, and the fifth valve 14 are closed. When the condensation product of the A-way condenser reaches a certain amount, close the A-way condensation and open the B-way condensation. The system automatically adjusts the first three-way valve 5 and the second three-way valve 6, closes the second valve 7, opens the third valve 8 and the fourth valve 13, completes the switching of the A and B condensers to ensure the continuous operation of the equipment. Open the nitrogen valve 26, and the nitrogen enters the collection tank 15 after the heater heats up and purges the condensate in the first condenser 9, and opens the first pressure relief valve 23. After the purge is completed, close the first pressure relief valve 23 and the nitrogen valve 26. Ethyl acetate accounts for 28.5wt% of the product obtained in the collection tank 15. Open the collection tank outlet valve 16 to allow the PV product to enter the phase separator 17, open the feed valve 27 to add the enhanced phase separation agent potassium phosphate and stir, and the second super-infiltration membrane assembly 19 is equipped with a super-hydrophobic / underwater super-oleophilic membrane, and the first super-infiltration membrane assembly 18 is equipped with a super-hydrophilic / underwater super-oleophobic membrane. The second super-infiltration membrane assembly 19 can selectively pass through ethyl acetate, open the fourth three-way valve 21 external discharge pipeline, and obtain a product of >99wt% ethyl acetate.

[0076] Example 3

[0077] The material system is a methanol / dimethyl carbonate solution composed of azeotropic composition, and the dimethyl carbonate therein is separated and recovered. An integrated method of first super-infiltration membrane separation and then pervaporation purification is adopted. In the integrated device, the feed valve 27 is opened to introduce the raw material into the phase separation tank 17, and the inducing phase separation agent water is added and fully stirred. The first super-infiltration membrane component 18 is equipped with a super-hydrophobic / underwater super-oleophilic membrane, and the second super-infiltration membrane component 19 is equipped with a super-hydrophilic / underwater super-oleophobic membrane. The first super-infiltration membrane component 18 can selectively pass through dimethyl carbonate, and the third three-way valve 20 is opened to discharge to the pipeline of the liquid tank 1. The dimethyl carbonate, methanol, and water obtained by the super-infiltration membrane unit are products of 91.5wt%, 5.5wt%, and 3wt%, respectively, which are transported to the liquid tank 1 by the second liquid pump 22, and the first valve 2 is opened after heating to 40°C. The feed liquid is transported to the pervaporation membrane assembly 4 by the first feed liquid pump 3, and circulates between the upstream side of the membrane and the feed liquid tank 1, and the flow rate is controlled at 50L / h. A hydrophilic pervaporation membrane is used in the pervaporation membrane assembly 4. Turn on the vacuum pump 12 and adjust the regulating valve 11 to control the permeation pressure at 300Pa. The temperature of the first condenser 9 and the second condenser 10 is controlled at -40°C. First turn on the A-way condensation. At this time, the first three-way valve 5 opens the pipeline from the pervaporation membrane assembly 4 to the first condenser 9, the second valve 7 is opened, and the second three-way valve 6, the third valve 8, the fourth valve 13, and the fifth valve 14 are closed. When the condensation product of the first condenser 9 of the A-way reaches a certain amount, the first condenser 9 of the A-way is closed and the second condenser 10 of the B-way is opened. The system automatically adjusts the first three-way valve 5 and the second three-way valve 6, closes the second valve 7, opens the third valve 8 and the fourth valve 13, and completes the switching of the A-way and B-way condensers to ensure the continuous operation of the equipment. The nitrogen valve 26 is opened, and the nitrogen is heated by the heater to enter the condensate in the first condenser 9 and enter the collection tank 15, and the first pressure relief valve 23 is opened. After the purging is completed, the first pressure relief valve 23 and the nitrogen valve 26 are closed. The condensate obtained in the collection tank 15 is mainly water and methanol, thereby purifying the product in the feed tank 1. When the product dimethyl carbonate in the feed tank 1 is detected by analysis and is greater than 99.5wt%, the third and fifth three-way valves 28 are opened to the external discharge pipeline to obtain the final product.

[0078] In the present application, different combinations can be used for different separation systems and separation targets.

[0079] For the recovery of a small amount of high-value organic components in aqueous solution or the separation of a small amount of organic pollutants in wastewater, an integrated method of pervaporation followed by superwetting membrane separation can be adopted. The preferential adsorption, dissolution and diffusion of a small amount of organic matter in water by the pervaporation membrane can be used to efficiently enrich the organic matter. If it contains multiple organic matter, the condensers with different temperatures can be connected in series in the condensation unit to collect organic matter with different condensation potentials by graded condensation. The product obtained by pervaporation enters the superwetting membrane separation unit. If the product is a phase separation, it is directly separated by a superwetting membrane that has a strong interaction with one of the phases. If the product is a mutually soluble liquid without phase separation, an inducer can be added to make it have a stronger interaction with one of the liquids in the mutual solution-liquid system to form a new phase, so that the other liquid is separated from the mixed system, resulting in phase separation. If the product obtained by superwetting membrane separation still has a small amount of impurities, it can be integrated with a first-level pervaporation purification product.

[0080] For the separation of organic / organic mixture solutions or organic / aqueous solutions, an integrated method of first superwetting membrane separation and then pervaporation can be adopted. In the superwetting membrane separation unit, an inducer is used to make it have a stronger interaction with one of the liquids in the mutually liquid-liquid system to form a new phase, so that the other liquid is quickly separated from the mixed system, resulting in phase separation, and then a superwetting membrane with a strong interaction with one of the phases is used for separation. The product obtained by superwetting membrane separation enters the pervaporation unit, and the pervaporation membrane is used to efficiently remove a small amount of impurities in the product, thereby purifying it to obtain the final target product.

[0081] Further optimization plan

[0082] As an optional implementation method of the embodiment of the present invention,

[0083] It should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. used herein to indicate the orientation or position relationship is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0084] In the description of this article, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0085] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An integrated pervaporation and superwetting membrane separation system, characterized in that: include: Liquid tank (1); A pervaporation membrane assembly (4), wherein the feed liquid side of the pervaporation membrane assembly (4) is connected to the feed liquid tank (1) via a first feed liquid pump (3); A condensation unit, the condensation unit being connected to the membrane permeation side of the pervaporation membrane module (4) via a vacuum pump (12); A heat purge unit, the heat purge unit is connected to the material cavity in the condensing unit; A phase separator (17), wherein the phase separator (17) is in communication with the condensation unit, and the condensate in the condensation unit is transported to the phase separator (17) through the hot purge unit; A super-wet membrane unit, wherein the super-wet membrane unit is connected to the outlet of the phase separator (17) and is connected to the feed liquid tank (1) via a second feed liquid pump (22).

2. The integrated pervaporation and superwetting membrane separation system according to claim 1, characterized in that: The condensing unit comprises: A first condenser (9) and a second condenser (10), wherein the first condenser (9) or the second condenser (10) is connected to the membrane permeation side of the pervaporation membrane assembly (4) via the vacuum pump (12), and the condensate in the first condenser (9) or the second condenser (10) is transported to the phase separator (17) via the heat purge unit.

3. The integrated pervaporation and superwetting membrane separation system according to claim 2, characterized in that: Also includes: A first three-way valve (5), wherein the heat sweep unit and the membrane permeation side of the pervaporation membrane assembly (4) are respectively connected to the first condenser (9) through the first three-way valve (5); A second three-way valve (6), the heat sweep unit and the membrane permeation side of the pervaporation membrane assembly (4) are respectively connected to the second condenser (10) through the second three-way valve (6).

4. The integrated pervaporation and superwetting membrane separation system according to claim 2, characterized in that: Also includes: A collecting tank (15), wherein the liquid outlet side of the collecting tank (15) is connected to the liquid inlet side of the phase separator (17), the liquid inlet side of the collecting tank (15) is connected to the liquid outlet side of the first condenser (9) via a fourth valve (13), and the liquid inlet side of the collecting tank (15) is connected to the liquid outlet side of the second condenser (10) via a fifth valve (14).

5. The integrated pervaporation and superwetting membrane separation system according to claim 2, characterized in that: The super wettable membrane unit comprises: A first superwet membrane assembly (18) and a second superwet membrane assembly (19), wherein the first superwet membrane assembly (18) and the second superwet membrane assembly (19) are respectively connected to the liquid outlet side of the phase separator (17), and the liquid outlet sides of the first superwet membrane assembly (18) and the second superwet membrane assembly (19) are respectively connected to the second liquid pump (22).

6. The integrated pervaporation and superwetting membrane separation system according to claim 5, characterized in that: Also includes: A third three-way valve (20), the third three-way valve (20) being connected between the liquid outlet side of the first superwet membrane assembly (18) and the second liquid pump (22); A fourth three-way valve (21), wherein the fourth three-way valve (21) is connected between the liquid outlet side of the second superwet membrane assembly (19) and the second liquid pump (22).

7. The integrated pervaporation and superwetting membrane separation system according to claim 3, characterized in that: The thermal purge unit comprises: A nitrogen compression tank, the nitrogen compression tank being connected to the first three-way valve (5) and the second three-way valve (6) via a nitrogen valve (26); A heater is connected between the nitrogen valve (26) and the first three-way valve (5) and the second three-way valve (6).

8. The integrated pervaporation and superwetting membrane separation system according to claim 1, characterized in that: Also includes: A fifth three-way valve (28), wherein the fifth three-way valve (28) is connected between the first feed liquid pump (3) and the feed liquid side of the pervaporation membrane module (4).

9. The integrated pervaporation and superwetting membrane separation system according to claim 1, characterized in that: Also includes: A feed valve (27), the liquid inlet side of the phase separator (17) is connected to the feed valve (27).

10. The integrated pervaporation and superwetting membrane separation system according to claim 4, characterized in that: Also includes: A sixth valve (16), the sixth valve (16) is connected between the collecting tank (15) and the phase separator (17).

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