DY-134 Electrodialysis Training Platform

Release time：2024-06-25 20:30viewed：times

1. Experimental purpose:
Electrodialysis is a membrane separation technology that has been developed recently. It is widely used in various water treatment industries. It can be used for the desalination of brackish water and the treatment of industrial production water, and can also be used for the recycling of waste liquid in metallurgy, chemical industry
, food, medicine and other industries. During the operation of electrodialysis, due to the different mobility of ions in the solution and in the exchange membrane, polarization occurs at high current density, causing the pH in the solution to change, scale to form on the exchange membrane, resulting in a decrease in water production capacity and additional energy loss. Therefore, before the operation of electrodialysis, its limiting current density must be determined. There are many methods to ensure the limiting current density of electrodialysis, and the commonly used method is the voltage-current method. This experiment adopts this method.
Through the experiment, we hope to achieve the following goals:
1. Familiar with the structure, function, installation method and operation method of each part of the electrodialyzer;
2. Master the determination and calculation method of the limiting current of the electrodialyzer;
3. Deepen the understanding of the relationship between current density, liquid flow rate and salt content in the solution during electrodialysis operation.
2. M*n technical indicators and parameters:
1. Ambient temperature: 5℃～40℃
2. Processed water volume: 100L/h
3. Ion exchange membrane: heterogeneous cation and anion exchange membrane,
4. Electrode material: (graphite, titanium powder coating),
5. Desalination rate: 50～75,
6. Electrodialyzer desalination rate ≧70～80,
7. Electrodialyzer size 400 mm×220 mm×500 mm,
8. Overall dimensions of the device: 1100mm×450mm×1400mm,
9. Working power supply: AC220V±10%, 50Hz, single-phase three-wire system, power 500W, safety protection: with grounding protection, leakage protection, overcurrent protection,
3. M*n configuration:
1. The device includes 1 set of electrodialysis outer cell, made of transparent plexiglass, with a wall thickness of 10mm (600mm×400mm×600mm),
2. 1 set of electrodialyzer, including: number of membrane p*rs: 96 p*rs, 4 levels and 8 sections;
3. Ion exchange membrane: heterogeneous cation and anion exchange membrane, electrode material: (graphite, titanium powder coating);
4. Adjustable DC regulated power supply: 0~60V, 0~5A, output mode: single channel, three-digit display,
5. 1 raw water tank, 1 concentrated water tank and 1 fresh water tank: white PP plate, thickness 10mm, with a vent valve on the bottom plate to dr*n the water,
6. 1 anti-corrosion water inlet pump, rated flow 1m3/h, head 15m, power 370W;
7. 1 raw water tank with motor stirring, 1 set of 304 st*nless steel stirring paddle: power 15W, speed 90rpm;
8. Flow measurement and regulation: rotor flowmeter, 3 liquid flowmeters (range 16-160L/H);
9. 3 pressure gauges,
10. 4 copper sampling ports,
11. 1 reverse switch,
12. Experimental table (10mm thick PP white board),
13. Power supply control system: 1 double-sided matte dense pattern spray-coated electric control box, leakage protector (Delixi brand), voltmeter, lockable button switch, wire pipe, etc.,
14. Matching UPVC connecting pipes and valves (Zhongc* brand).
15. St*nless steel frame experimental table (30mm×30mm st*nless steel square tube, equipped with casters for universal wheels with locking feet), etc.
16. Virtual simulation software for electrical installation of building and intelligent building Based on unity3d design, users can choose different sizes of interactive interfaces according to computer configuration, and can choose six levels of image quality. The model in the software can be rotated 360°, enlarged, reduced, and translated. There are assistant prompts during the use of the software, as follows: A. Wet alarm system 1. System overview: Overview of wet alarm system 2. Equipment recognition: It has the best viewing angle, equipment det*ls (displaying the introduction or parameters of the equipment), exercises (built-in 6 multiple-choice questions, with prompts for correct and wrong choices), schematic diagram (you can enter the equipment from the schematic diagram). The equipment includes: sprinkler, water flow indicator, signal butterfly valve, exhaust valve, fire alarm control, high pressure gauge, high-level water tank, weiya control cabinet, pressure regulating tank, flow switch, terminal water testing device, dr*nage facility, water pump coupler, hydraulic alarm, delay device, wet alarm, butterfly valve, check valve, fire pump, safety pressure regulating valve, fire water pool. 3. Principle demonstration: Demonstrate the working principle of the wet alarm system, 3D animation demonstration, 3D model is semi-transparent, and the internal water flow can be seen. Equipped with practice module (4 built-in multiple-choice questions, with prompts for correct and wrong choices) 4. Design layout: There are multiple-choice questions and calculation questions, each question is scored, and the correct answer and score will be displayed after submission. B. Gas fire extinguishing system 1. System overview: Overview of gas fire extinguishing system
2. Equipment recognition: It has the best viewing angle, equipment det*ls (displaying the introduction or parameters of the equipment), exercises (8 built-in multiple-choice questions, with prompts for correct and incorrect choices), and schematic diagrams (you can enter the equipment from the schematic diagram). The equipment includes: nozzles, HFC-227 storage bottles, bottle head valves, heptafluoropropane one-way valves, high-pressure hoses, gas one-way valves, safety valves, weighing alarms, electromagnetic starters, selection valves, smoke alarms, and fire alarm controllers.
3. Principle display: It shows the working principle of the gas fire extinguishing system, with a three-dimensional animation demonstration. The three-dimensional model is semi-transparent, and the internal gas can be seen. Equipped with an exercise module (3 built-in multiple-choice questions, with prompts for correct and incorrect choices)
4. Design layout: There are 6 multiple-choice questions, each of which is scored. The correct answer and score will be displayed after submission.
C. Escape drills: Teaching is carried out in the form of fun games. Escape from the burning room within a limited time. If you make a wrong choice, you will directly enter the score interface.
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