Transformer Rectifier For Chlor Alkali Plant Up To 50kA 800V 20 Years History Exported To 50 Countries

Green Power Transformer Rectifier for Chlor Alkali to deliver high power stable DC power for electrolyzer through Membrane Cell Process. The focus of our expertise and experience is on designing complete rectifier systems, except rectifier, we also supply transformers, heat exchanger, harmonic filter, busbars, DC isolators, switchgear and many other electrical equipment you may require.

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Product Details

Transformer Rectifier for Chlor Alkali Plant

Introduction to Chlor Alkali Process

Green Power provides the transformer rectifier for the Chlor Alkali electrlysis process

Plants producing Chlorine and Caustic Soda are known as Chlor-Alkali plants. For commercial production of chlorine and caustic soda, the following three different processes are presently employed world-wide.

◆ Amalgm Process: The electrolysis using graphite anodes or metal anodes and mercury cathodes.

◆ Diaphragm Process: The electrolysis using graphite anodes or metal anodes and iron cathodes partitioned by diaphragm.

◆ Membrane Cell Process: The electrolysis using metal andoes and metal cathodes partictioned by cation exchange membranes.

All the above processes are based upon electrolysis of aqueous solution of sodium chloride. The electrolysis is carried out by passage of direct current through the aqueous solution of sodium chloride.

Though the first two processes namely the amalgam process and the diaphragm process are also being employed for production of chlorine and caustic soda, but the focus has now shifted on to membrane cell process because it has got the various advantages over the other processes.

Principle of Membrane Cell Process:

The membrane is the heart of the membrane cell process. It acts as a barrier between the anode and the cathode compartments of the cell. The membrane is impermeable for liquid and gas. It allows the passage of Na+ cations through it and prevents the passage of OH- inons. The membranes consist of fluorocarbon matrices.

The membrane process employs two types of designs namely the bipolar design and mono-polar design. In the mono-polar design, the elements are connected in parallel, thus it has high amperes and low voltage. In bipolar design, elements are connected in series, thus it has low amperes and high voltage.

Advantages of Membrane Cell Process:

◆ Reduced energy consumption.

◆ Less space requirement for electrolysis.

Caustic-soda-99-sodium-hydroxide-pearls-flakes

Caustic Soda Production Process

Highlights of Green Power Transformer Rectifier

◆ Latest Rectifier Technology

◆ Design to all types of environments

◆ Remote monitoring via PLC modem

◆ 1+1 Digital Controller, Dual channel hot backup controller

◆ Combined with the application process and technical parameters, optimize main circuit design, ferromagnetic calculation and structure design to effectively reduce EMI, loss and improve efficiency

◆ Adaptive filtering of synchronous signal

◆ Optical fiber trigger, small optical delay, good synchronization effect, strong anti-interference ability

◆ Self developed DSP digital control, fast response, high control accuracy, high reliability, easy for DCS networking

◆ High reliability, verified by export application

◆ Multiple parallel thyristors are considered in the structural design, with good current sharing effect

◆ Anti corrosion treatment

◆ International level process standard

◆ Transformer On Load Tap Changer available

◆ Harmonics studies available

◆ Based on specifications we can conform to IEC, IEEE, CE, UL, CSA, etc...

◆ High Efficiency units with low operating temperatures

◆ Stainless steel water piping

◆ Thyristor N+1 redudancy

◆ Multi-pulse configurations available

◆ Grounding insulation detection available

◆ Design to local environment, altitude and cooling conditions with all cooling system types available

◆ Air cooling rectifier availalbe in minus Celsius degree temperature area to avoid water freezing, have experience

◆ 7:00-23:00 Beijing Time in service (UTC+8）

Main Composition of Transformer Rectifier

◆ Rectifier transformer(OFWF, OFAF, ONAN)

◆ Thyristor Rectifier(6 pulse, 12 pulse, 18 pulse, 24 pulse etc.), forced water cooling or air cooling

◆ Heat Exchanger(Deionized water）for rectifier

◆ Copper bus bars

◆ High current measurement meter

◆ DC disconnector

◆ High voltage switchgear

◆ Harmonic filter

◆ Power factor compensation capacitor bank

◆ Others required by the customer

transformer rectifier system for Chlor Alkali

Main Parameters of Transformer Rectifier

Input AC voltage	AC 3 phase kV level, 50Hz/60Hz
Rated output DC voltage	Up to DC 800V
Rated output DC current	Up to DC 50kA
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	≥98%(typically)
Stability of output current at set point	Within ±0.5%
Type of control	Digital control
Ingress protection class of rectifier panel	IP54
Ambient temperature for design purpose	Max. 50℃
Rectifier pulse	Thyristor based, 6 pulse, 12 pulse, 24 pulse or more
Type and mode of control	Constant current
Duties/overload	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	OFWF, OFAF, ONAN
Transformer installation place	Indoor or Outdoor
HMI	Color touch panel
Remote control interface	4-20mA/0-10V signal and dry contacts, Modbus/Profibus/ Profinet/Ethernet communication
Thyristor N+1 redundancy	Yes
Heat exchanger	Deionized water/raw water exchange, with redudancy
Protections	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