High Efficiency Rectifier For Caustic Soda Up To DC 20kA 700V

High Efficiency Rectifier For Caustic Soda Up To DC 20kA 700V

1. More than 20 years experience of rectifier for caustic soda
2. DC output up to 20kA 700V
3. Optimized solution for whole electrical system: rectifier, transformer, bus bars, DC isolators, switchgear, heat exchangers, filter banks
4. Self design and production

Product Details

High Efficiency Rectifier for Caustic Soda up to DC 20kA 700V

1. Company Simple Introduction 

Green Power is an international professional rectifier manufacturer with more than 20 years experience, the designed and manufactured rectifier for caustic soda having the advantages of high reliability, high efficiency, high accuacy, high stability, low ripple, intelligent digital control etc. 

2. Capable Scope of Range of Rectifier for Caustic Soda 

Based on customer's requirement, based on our experience, we could provide not only rectifier for caustic soda, we also supply transformers, busbars, DC isolators, switchgear, filter banks and any other electrical equipment you may require, like it is shown in below figure.

Rectifier system for caustic soda

3. Application Introduction of Rectifier for Caustic Soda

The raw material of chlor-alkali electrolysis is common salt (NaCl). An electrochemical reaction according to the formula

caustic soda generation formula

causes Cl- ions to be oxidized to chlorine at the anode, while water is reduced to hydrogen and OH- ions at the cathode. To bring this about, specially prepared pure brine is fed into the anode compartment. A cation-selective membrane separates the cathode compartment from the anode compartment. Only hydrated sodium ions can pass through the membrane. With the aid of the electric field, chloride ions are blocked out very well. As a result, the OH- ions combine with Na+ ions in the cathode compart-ment to form pure caustic soda.

caustic soda plant

4. Main Technical Parameters of Rectifier for Caustic Soda

Input voltage

AC 3 phase kV level, 50Hz/60Hz

Rated output DC voltage

up to DC 1000V

Rated output DC current

up to DC 100kA

Design Standard

IEC-60146       Semiconductors converters

IEC-60076       Power transformers

IEC-61378       Converters transformers

Power factor at input @rated load

Not less than 0.9 through on load tap changer 

without power factor improving capacitor banks, above 0.97 

after compensation

Efficiency @ rated load


Stability of output current at set point

Within ±0.5%

Type of control

Digital control

Ingress protection class of rectifier panel


Ambient temperature for design purpose

Max. 50℃

Rectifier pulse

Thyristor based 12 or 24 pulse 

Type and mode of control

Constant current


150% for 1 minutes, 110% for 5 minutes, 100% long term

Rectifier thyristor cooling

Forced water cooled(cooling water is deionized water)

Transformer cooling method


Transformer installation place

Indoor or Outdoor


Color touch panel

Remote control interface

4-20mA signal and dry contacts/Modbus/Profibus/ Profinet

Thyristor N-1 redundancy


Heat exchanger

Deionized water/raw water exchange, with redudancy


Grounding detection and grounding fault alarm

Thyristor RC snubber

Fast action fuses

Over heat

Output over voltage

Output over current

Water pressure

Water temperature

Others required by purchaser

5. Benefit to user of GP Rectifier for Caustic Soda

  • High Power Rectifiers ensure your process operating under all conditions

  • High performance – the base for your productivity: 

     − High Reliability: every measures to ensure the reliability of the system, thyristor N-1 redundancy, 

        heat exchagner redundancy. 

     − Power Saving: opmizied design, matrial, craftwork to get masimized efficiency

     − High accuracy DC output current control

     − Low output ripple

     − High power factor

     − Friendly HMI

  • You achieve lowest total cost: 

    − Maximized availability 

    − Maximized electrical efficiency 

    − Minimized maintenance 

    − Highest personnel safety 

    − Longest lifetime: properly maintained rectifier system can last more than 25 years.

    − Shortest installation and commissioning

  • Smart digital control for immunity to interference, good automatic control system, for your easy operation and control

  • Life cycle service – for customer satisfaction: technical training, local service, always online

6. Company Introduction Video:

7. Contact us:

Email: alice@bjgreenpower.com

Whatsapp: +86 13810151476

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