Silicon control rectifier 19.2kA 255V for electrolysis
in Caustic Soda Plant
The raw material of chlor-alkali electrolysis is common salt (NaCl). An electrochemical reaction according to the formula :
It 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 compartment to form pure caustic soda.
2. Working principle
The rectifier system is composed of input high voltage switchgear, voltage regulating transformer for on load tap changer(OLTC), rectifier transformer, rectifier, DC switch, cooling water heat exchanger, power factor & harmonic compensation facility. To get higher power factor and lower ripple, 12 pulse configuration is commonly adopted. The system circuit diagram is shown here.
3Φ380V (±5%), 50Hz
Output current stability
≤0.5% (when in range of load voltage 30%～100%)
≥0.85 (full load)
Voltage reserve factor
Current reserve factor
Constant voltage and constant current
Long time continuous operation full load
Overvoltage/current, under water pressure, under water flaw, over water temperature, synchronizing signal, fast fuse protections and etc.
4. Working condition
Ø Used indoors, ambient temperature：-5℃～+45℃
Ø Phase input：380VAC±10%, 3 phase unbalance degree less than 5%, meet nation power quality standards.
Ø Elevation: less than 2000m
Ø There shouldn’t be excessive amount of dust, explosive and corrosive gas in the air.
Ø 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.
Ø Saturated vapor pressure: daily average value is less than 2.2×10-3M pa, monthly average value is less than 1.8×10-3Mpa.
5. Why choose us?
u Rich experience: More than 20 years design, production and service experience for electrolysis
u Meet International Standards: Exported to USA, Canada, Germany more than 40 countries.
u Strong technical ability:PhD technical team, more than 20 years technology accumulation.
u Reliable quality:Designed, manufactured, tested as per strict reliability standard.
u Considerate service: Professional service before, during and after sales. Lifelong after service system. Customer management system
u High performance price ratio:With Europe/USA quality, competitive price than Europe.
6. Sales network
Have international distributors and agents in 17 countries
Exported to USA, Canada, Germany, UK, India, Mexico, Korea, Chile, Korea etc. more than 40 countries
English, Russian, Spanish 3 foreign languages support in Green Power
Participate in international exhibitions
Customer visit around the world