Nanofiltration membrane teaching device

Abstract

The utility model provides a nanofiltration membrane teaching device. The nanofiltration membrane teaching device comprises a raw material tank, a nanofiltration membrane assembly, a feeding pump and a conveying pipeline, the tank body of the raw material tank provided with the thermometer is provided with a jacket, and a cooling medium can be introduced into the jacket; an aqueous solution in the raw material tank can be pumped into the nanofiltration membrane assembly or flows back to the raw material tank through the feeding pump, the aqueous solution entering the nanofiltration membrane assembly is separated through a nanofiltration membrane to obtain a concentrated solution and a clear solution, the concentrated solution flows back to the raw material tank, the clear solution is divided into two paths, one path flows back to the raw material tank, and the other path is discharged; each pipeline of the conveying pipeline is formed by splicing hoses through quick connectors, is connected among the raw material tank, the nanofiltration membrane assembly and the feeding pump, and is used for conveying an aqueous solution, a concentrated solution and a clear solution. The teaching aid is simple in structure, simple in flow, convenient in pipeline switching and excellent in operability, can provide sufficient practical conditions for students, and can meet practical requirements of classroom experiment teaching.

Description

TECHNICAL FIELD

[0001] The utility model relates to a chemical teaching device, more specifically, a nanofiltration membrane teaching device in the membrane separation technical field. BACKGROUND

[0002] Nanofiltration membrane is a kind of membrane separation technology with the unique advantages such as high efficiency, practicality, no pollution and simple process, which is driven by pressure difference and intercepts nanometer particles in water between reverse osmosis and ultrafiltration. UTILITY MODEL CONTENT

[0003] To solve the above technical problems, the utility model provides a nanofiltration membrane teaching device, which is simple in structure, simple in process, convenient in pipeline switching and good in operability, can provide sufficient hands-on conditions for students and meet the practical needs of classroom experimental teaching.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A nanofiltration membrane teaching device has the following structural characteristics:

[0006] The nanofiltration membrane teaching device comprises a raw material tank, a nanofiltration membrane assembly, a feed pump and a conveying pipeline.

[0007] The raw material tank provided with a thermometer is used for storing water solution to be treated, the liquid temperature in the tank is detected in real time by the thermometer, the tank body is provided with a jacket, and cooling medium can be introduced into the jacket.

[0008] The water solution in the raw material tank can be pumped into the nanofiltration membrane assembly or backflow to the raw material tank by the feed pump, the water solution entering the nanofiltration membrane assembly is separated by the nanofiltration membrane to obtain concentrated solution and clear solution, the concentrated solution backflows to the raw material tank, and the clear solution is divided into two routes, one of which backflows to the raw material tank, and the other of which is discharged.

[0009] Each pipeline of the conveying pipeline is respectively spliced by a hose through a quick connector and is connected between the raw material tank, the nanofiltration membrane assembly and the feed pump, and is used for conveying water solution, concentrated solution and clear solution.

[0010] The utility model also has the following structural characteristics:

[0011] The nanofiltration membrane assembly is a roll-type membrane assembly, and the molecular weight is 150 or 500 or 1000 daltons.

[0012] The feed pump is a diaphragm pump, a centrifugal pump or a peristaltic pump.

[0013] The conveying pipeline comprises:

[0014] A raw material tank drain pipe with a drain valve is connected to the bottom outlet of the raw material tank, and a raw material tank liquid outlet pipe is connected in parallel with the raw material tank drain pipe and between the bottom outlet of the raw material tank and the inlet of the feed pump;

[0015] A water solution return pipe with a first flow regulating valve and a second flow regulating valve is connected to the outlet of the feed pump and between the outlet of the feed pump and the water solution return port at the top of the raw material tank, and a water solution inlet pipe with a feed valve and a membrane inlet pressure gauge is connected between the outlet of the feed pump and the inlet of the nanofiltration membrane assembly;

[0016] A concentrated liquid return pipe with a concentrated liquid return valve is connected between the concentrated liquid outlet of the nanofiltration membrane assembly and the concentrated liquid inlet at the top of the raw material tank;

[0017] A clear liquid return pipe with a clear liquid return valve is connected to the clear liquid outlet of the nanofiltration membrane assembly and between the clear liquid outlet of the nanofiltration membrane assembly and the clear liquid inlet at the top of the raw material tank, and a clear liquid discharge pipe with a clear liquid transfer valve is connected in parallel with the clear liquid return pipe and used for discharging the clear liquid outward.

[0018] The cooling medium in the raw material tank jacket comes from a temperature-controlled cold water machine, and the cooling medium can circulate between the jacket and the temperature-controlled cold water machine.

[0019] The raw material tank, the nanofiltration membrane assembly, the feed pump and the conveying pipeline are respectively detachably mounted on the frame, and the temperature-controlled cold water machine is externally arranged independently of the frame, wherein the raw material tank and the nanofiltration membrane assembly are arranged side by side above the feed pump.

[0020] Compared with the prior art, the present application has the beneficial effects of:

[0021] On the one hand, the present application has a simple and not complicated process, and the principle and process engineering of the membrane equipment are shown in a clear and easy-to-understand form, so that students can more easily understand and master them, and the efficiency and quality of experimental teaching are improved; on the other hand, the present application uses the form of soft pipes connected through quick couplings for the conveying pipeline, and when applied to teaching experiments, students can fully participate in the experiments by personally disassembling and reassembling the pipelines, and have a large hands-on space and a high degree of operability, which is very helpful to improve the thinking ability and innovation ability of students, stimulate the learning interest and enthusiasm of students, and enrich the teaching methods; in addition, the present application can not only meet the needs of nanofiltration membrane experiments such as wastewater treatment and material desalination, but also realize experimental teaching of the influence of temperature on the nanofiltration process by connecting a temperature-controlled cold water machine to the raw material tank jacket to introduce cooling medium. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a flowchart of the present application.

[0023] In the figure, 1 is a raw material tank; 11 is a jacket; 2 is a thermometer; 31 is a raw material tank blowdown pipeline; 32 is a blowdown valve; 4 is a raw material tank liquid outlet pipeline; 5 is a feed pump; 61 is a water solution inlet pipeline; 62 is a feed valve; 63 is a membrane inlet pressure gauge; 71 is a water solution reflux pipeline; 72 is a first flow regulating valve; 73 is a second flow regulating valve; 8 is a spiral-wound membrane module; 91 is a concentrated liquid reflux pipeline; 92 is a membrane outlet pressure gauge; 93 is a concentrated liquid reflux valve; 101 is a clear liquid reflux pipeline; 102 is a clear liquid reflux valve; 111 is a clear liquid discharge pipeline; 112 is a clear liquid transfer valve; 12 is a temperature control water chiller; 121 is a cooling medium delivery pipeline; 122 is a cooling medium reflux pipeline. DETAILED DESCRIPTION

[0024] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0025] Please refer to Figure 1 The nanofiltration membrane teaching device of the present embodiment comprises a raw material tank 1, a nanofiltration membrane module 8, a feed pump 5 and a delivery pipeline.

[0026] The raw material tank 1 provided with a thermometer 2 is used for storing water solution to be treated, the liquid temperature in the tank is detected in real time by the thermometer 2, the tank body is provided with a jacket 11, and cooling medium can be introduced into the jacket 11.

[0027] The water solution in the raw material tank 1 can be pumped into the nanofiltration membrane module 8 or backflow to the raw material tank 1 by the feed pump 5, the water solution entering the nanofiltration membrane module 8 is separated by the nanofiltration membrane to obtain concentrated liquid and clear liquid, the concentrated liquid backflows into the raw material tank 1, and the clear liquid is divided into two routes, one of which backflows to the raw material tank 1 and the other of which is discharged.

[0028] The pipelines of the delivery pipeline are respectively spliced by hoses through quick couplings, are connected between the raw material tank 1, the nanofiltration membrane module 8 and the feed pump 5, and are used for the delivery of water solution, concentrated liquid and clear liquid.

[0029] In the specific implementation, the corresponding structure of the nanofiltration membrane teaching device also comprises:

[0030] The nanofiltration membrane module 8 is a spiral-wound membrane module, the molecular weight is 150 or 500 or 1000 Dalton, and can be used for material desalination, wastewater treatment and the like.

[0031] The feed pump 5 is a diaphragm pump or a small centrifugal pump or a peristaltic pump or a magnetic drive pump.

[0032] The conveying pipeline comprises:

[0033] The raw material tank drain pipeline 31 connected at the bottom outlet of the raw material tank 1 is connected with the raw material tank liquid outlet pipeline 4 in parallel, the raw material tank drain pipeline 31 is provided with a drain valve 32, and the raw material tank liquid outlet pipeline 4 is connected between the bottom outlet of the raw material tank 1 and the inlet of the feed pump 5;

[0034] The water solution return pipeline 71 connected at the outlet of the feed pump 5 is provided in parallel with the water solution inlet pipeline 61, the water solution return pipeline 71 is connected between the outlet of the feed pump 5 and the water solution return port at the top of the raw material tank 1, is provided with a first flow regulating valve 72 and a second flow regulating valve 73, and the water solution inlet pipeline 61 is connected between the outlet of the feed pump 5 and the inlet of the nanofiltration membrane assembly 8, is provided with a feed valve 62 and a membrane inlet pressure gauge 63.

[0035] The concentrated liquid return pipeline 91 provided with a membrane outlet pressure gauge 92 and a concentrated liquid return valve 93 is connected between the concentrated liquid outlet of the nanofiltration membrane assembly 8 and the concentrated liquid inlet at the top of the raw material tank 1.

[0036] The clear liquid return pipeline 101 connected at the clear liquid outlet of the nanofiltration membrane assembly 8 is provided in parallel with the clear liquid discharge pipeline 111, the clear liquid return pipeline 101 is provided with a clear liquid return valve 102, is connected between the clear liquid outlet of the nanofiltration membrane assembly 8 and the clear liquid inlet at the top of the raw material tank 1, the clear liquid discharge pipeline 111 is provided with a clear liquid transfer valve 112 for outward discharge of the clear liquid, and the water produced by the nanofiltration membrane assembly 8 can be selected to return to the raw material tank 1 or directly transferred away through the clear liquid return pipeline 101 and the clear liquid discharge pipeline 111.

[0037] The raw material tank 1, the nanofiltration membrane assembly 8, the feed pump 5 and the conveying pipeline are detachably mounted on the frame, the temperature control cold water machine 12 is independent of the frame and is externally arranged, the raw material tank 1 and the nanofiltration membrane assembly 8 are arranged side by side on the left and right of the frame, and are located above the feed pump 5. The membrane inlet pressure gauge 63 and the membrane outlet pressure gauge 92 are arranged on the frame panel above the feed pump 5, and a power switch and a feed pump 5 switch are also mounted on the frame panel. By integrally mounting the raw material tank 1, the feed pump 5, the nanofiltration membrane assembly 8 and the conveying pipeline on the frame, the layout is compact, the occupied space is small, the overall appearance is simple, the assembly difficulty is low, and maintenance and movement are facilitated.

[0038] The cooling medium flowing into the jacket 11 of the raw material tank 1 is from a temperature-controlled cold water machine 12, and the cooling medium can circulate between the jacket 11 and the temperature-controlled cold water machine 12. The jacket 11 of the raw material tank 1 is provided with a liquid inlet at the lower part and a liquid outlet at the upper part, and the liquid inlet is detachably connected with the liquid outlet of the temperature-controlled cold water machine 12 through a cooling medium conveying pipeline 121, and the liquid outlet is detachably connected with the liquid inlet of the temperature-controlled cold water machine 12 through a cooling medium return pipeline 122.

[0039] The raw material tank 1 is provided with an injection inlet for adding the water solution to be treated into the tank, and the tank has a capacity of 5L. The thermometer 2 is a bimetallic thermometer 2.

[0040] The raw material tank 1, the feed pump 5 and the nanofiltration membrane assembly 8 can be respectively bolted on the frame in a detachable manner, so that the membrane assembly can be replaced or the size and configuration of the membrane assembly can be changed.

[0041] During the demonstration, the device can be operated in the following manner:

[0042] The water solution to be treated is injected into the raw material tank 1, the pipelines and valves are checked, the cooling medium is introduced into the jacket 11 of the raw material tank 1 through the temperature-controlled cold water machine 12, the temperature is detected through the thermometer 2, the liquid temperature in the tank reaches the experimental requirement, the feed pump 5 is started, the first flow regulating valve 72 and the second flow regulating valve 73 are adjusted, the water inflow and the clear liquid flow of the nanofiltration membrane assembly 8 reach the experimental design requirement, and the device starts to work.

[0043] During the working process, the water inflow and conductivity, the clear liquid return flow and conductivity, and the temperature of the nanofiltration membrane assembly 8 are recorded.

[0044] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A nanofiltration membrane teaching device, characterized in that: it comprises a raw material tank, a nanofiltration membrane assembly, a feed pump and a conveying pipeline; the raw material tank provided with a thermometer is used for storing a water solution to be treated, the liquid temperature in the tank is detected in real time by the thermometer, and the tank body is provided with a jacket into which a cooling medium can be introduced; the water solution in the raw material tank can be pumped into the nanofiltration membrane assembly or backflow to the raw material tank by the feed pump, the water solution entering the nanofiltration membrane assembly is separated by the nanofiltration membrane to obtain a concentrated solution and a clear solution, the concentrated solution backflows to the raw material tank, and the clear solution is divided into two routes, one of which backflows to the raw material tank and the other of which is discharged; the pipelines of the conveying pipeline are respectively spliced by hoses through quick couplings and are connected between the raw material tank, the nanofiltration membrane assembly and the feed pump and used for conveying the water solution, the concentrated solution and the clear solution.

2. The nanofiltration membrane teaching device according to claim 1, characterized in that: the nanofiltration membrane assembly is a spiral membrane assembly, and the molecular weight is 150 or 500 or 1000 daltons.

3. The nanofiltration membrane teaching device according to claim 1, characterized in that: the feed pump is a diaphragm pump, a centrifugal pump or a peristaltic pump.

4. The nanofiltration membrane teaching device according to claim 1, characterized in that: the conveying pipeline comprises: a raw material tank blowdown pipeline and a raw material tank liquid outlet pipeline connected at the bottom outlet of the raw material tank, the raw material tank blowdown pipeline being provided with a blowdown valve, and the raw material tank liquid outlet pipeline being connected between the bottom outlet of the raw material tank and the inlet of the feed pump and being in parallel with the raw material tank blowdown pipeline; a water solution backflow pipeline and a water solution inlet pipeline connected at the outlet of the feed pump and arranged in parallel, the water solution backflow pipeline being connected between the outlet of the feed pump and a water solution backflow port at the top of the raw material tank and being provided with a first flow regulating valve and a second flow regulating valve, and the water solution inlet pipeline being connected between the outlet of the feed pump and the inlet of the nanofiltration membrane assembly and being provided with a feed valve and a membrane inlet pressure gauge; a concentrated solution backflow pipeline provided with a membrane outlet pressure gauge and a concentrated solution backflow valve and connected between the concentrated solution outlet of the nanofiltration membrane assembly and a concentrated solution inlet at the top of the raw material tank; and a clear solution backflow pipeline and a clear solution discharge pipeline connected at the clear solution outlet of the nanofiltration membrane assembly and arranged in parallel, the clear solution backflow pipeline being provided with a clear solution backflow valve and connected between the clear solution outlet of the nanofiltration membrane assembly and a clear solution inlet at the top of the raw material tank, and the clear solution discharge pipeline being provided with a clear solution transfer valve and used for discharging the clear solution outward.

5. The nanofiltration membrane teaching device according to claim 1, characterized in that: the cooling medium introduced into the jacket of the raw material tank comes from a temperature-controlled cold water machine, and the cooling medium can circulate between the jacket and the temperature-controlled cold water machine.

2. The nanofiltration membrane teaching apparatus of claim 1, wherein:

6. The nanofiltration membrane teaching device according to claim 1, characterized in that: the raw material tank, the nanofiltration membrane assembly, the feed pump and the conveying pipeline are respectively detachably mounted on a frame, and the temperature-controlled cold water machine is independent of the frame and is externally arranged, the raw material tank and the nanofiltration membrane assembly are arranged side by side and above the feed pump.

3. The nanofiltration membrane teaching apparatus of claim 1, wherein: ​ 4. The nanofiltration membrane teaching apparatus of claim 1, wherein, ​ ​ ​ ​ ​ 5. The nanofiltration membrane teaching apparatus of claim 1, wherein: ​ 6. The nanofiltration membrane teaching apparatus of claim 5, wherein: ​

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