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Seawater Electrolysis Switch Mode Rectifier for Producing Sodium Hydroxide Chlorine Gas Hydrogen Gas

Seawater Electrolysis Switch Mode Rectifier for Producing Sodium Hydroxide Chlorine Gas Hydrogen Gas

1. IGBT switch mode electrolysis rectifier's application range

The switch mode electrolysis rectifiers as AC-DC power supply to provide dc source, for various electrolysis process where it needs relatively lower power below 500kw, such as Electrolysis ofion-exchange membrane Caustic soda (NaOH), sodium hydroxide,potassium hydroxide, copper foil, salt solution,seawater desalination Electrodialysis(ED), DC power supply for nonferrous metals electrowinning from melts (aluminum, magnesium) and solutions (zinc, copper, nickel, sodium, cadmium, lead, manganese, water, etc.);power supply of electrolysis units for gas production Chloro, Fluoro,Hydrogen fluoride, producing chlorine (Cl2) by electrolysis of brinein the process of Chlor-Alkali (CA), and caustic soda and hydrogen are generated together, Chlorine (Cl2) is used as a raw material for the PVC process, isopropyl cyanide process and phenol process and rectifier for electrolysis of fused salt. 

For 500kw above power demand for electrolysis, it's recommended to use SCR based rectifier.  

2. GERE ac dc switching power supply advantages

• Support parallel or series connection for different number of electrolysis cells parallel or series, you choose capacity yourself

• Harmonics<15%, power factor >0.93, minimum impact on supply network

• High voltage available up toDC  500V

• High accuracy up to 0.1%

• High reliability, low fault rate, robust running

• Long service lifespan

• Modular design, compact size

• Centralized control and diagnostics using modern microprocessor systems, optimization of process control

• High performance price ratio

• Design to seismic zone and altitude

3. Block diagram of the dc rectifiers
The switch-mode rectifier is working at the following diagram:
The mains rectifier bridge converts the voltage into DC voltage. The IGBT modules power electronicsthen convert the DC voltage pulse width modulated into a alternating voltage. The internal transformerrealizesisolation and voltage adjustment on the secondary side. On the output side rectification is achieved by fast power diodes. Aconstant smoothed and fully controllable DC voltage is generatedatthe output side.

4. Technical R&D ability of the dc rectifiers 

• 20+years rectifier R&D and engineering experience

• 40 people technical team, 6 doctor degreein power electronics

• Authorized high-tech company

• Self developed and programmed digital controller

• Have its own Patent and Software Copyright

• Independent technology: DSP digital micro processor controller, modular design, self developed touch panel controller, automatic output polarity reverse.

5. Technical parameters of the dc rectifiers 

6. Installation and connection  of the dc rectifiers 
The rectifier should be installed in the environment with the following conditions

• Location: indoor use only

• Ambient temperature: 0℃~+40℃

• Relative humidity: ≤90% (relative to 20±50℃).

• Power requirement: AC nominal voltage+/-10%, 3 phase 4 line, 3 phase imbalance less than 5％, and meet national electricity quality standard.

• Water input temperature(water cooling): 20-35℃

• Altitude: less than 2,000 meters.

• There shouldn't be excessive amount of dust, explosive and corrosive gas in the air.

• The installation place should be without severe vibration, the vertical gradient shouldn't exceed 5%.

• The seismic intensity of the installation site is less than 7 on the Richter scale.

• Saturated vapor pressure: daily average value is less than 2.2×10-3M pa, monthly average value is less than 1.8×10-3Mpa.

Connect the rectifier with AC input, DC load and remote control interface from back side of the rectifier. The operation such as set constant voltage/constant current, set local control/remote control, ON/OFF is conducted on the touch panel or through remote control interface such as 4-20mA/0-10V, RS485, RS232, Profibus, Profinet etc. Our rectifier can be used inside the generator by remote control.

7. Package and Shipment  of the dc rectifiers 
The rectifier is packed in strong plywood material wooden package, withstand long distance air shipping or sea shipping.

8.Customer feedback about seawater electrolysis for hydrogen by our swith mode rectifier:

Looking for switch mode rectifier for electrolysis seawater electrolysis producing sodium hydroxide chlorine gas hydrogen gas? Chengdu General Rectifier Research Institute is one of the professional manufacturers and suppliers. We have been dedicated to this field for over 20 years and already exported products to India, USA, Germany, etc. Equipped with a productive factory, we warmly welcome you to buy our high quality products made in China at competitive price or try our customized service.