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.
|
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
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 |
Reference Pictures of Transformer Rectifier
Activities in Chlor Alkali Industry
Green Power Attended AMAI Seminar and Exhibition India
Green Power Attended 18th China International Chlor-Alkali Conference
Chairman Introduction
◆ Was invited by former Premier as one of 10 representatives
◆ PhD in power electronics
◆ Professor in Beijing Jiaotong University
◆ One of Millions Talent
◆ Model worker in Beijing
◆ Enjoy special allowance of Chinese Government
◆ Have 20 major awards
◆ Has 24 authorized patents, 5 software copyright
◆ Published more than 70 papers
◆ Published 4 books
◆ Member of National Power Electronics Standardization Committee
◆ Executive director of the fifth executive board in Beijing Electric Power Electronics Association
◆ Lead the team fulfilled many national grade important projects
Technology Capability
◆ High-tech company
◆ 20+ years power electronics R&D and engineering experience
◆ Talented technical team, Ph.D and master degree engineers
◆ Experience in industrial applications more than 20 years, have rich experience of both technical design and onsite service.
◆ Mutual R&D with universities
◆ Patent and Software Copyright certification
◆ Self developed DSP(USA TI company's chip) digital controller
◆ Self developed and designed products
◆ Products design meet IEC, UL, CE , CSA and etc. standards
Green Power Introduction Video
Rectifier Manufacture Factory Picture
Contact us:
Alice Lee
Email: alice@bjgreenpower.com
Whatsapp/mobile: +86 13810151476
Wechat: 65044167
