Asia Chemical Engineering Co., Ltd. is one of the most reliable manufacturers and suppliers of membrane cell caustic soda plant in China. Please rest assured to wholesale cost-efficient membrane cell caustic soda plant from our factory. Good service and reasonable price are available.
Complete Plant Core Systems
Scalability: Designed flexibly across multiple operational scales: 10,000 TPA, 50,000 TPA, 100,000 TPA, up to large-scale integrated chlor-alkali complexes.
Membrane Cell Electrolysis Principle
Inside the electrolyzer, direct current drives electrochemical decomposition. Purified brine enters the anode chamber, while water enters the cathode chamber. The selective ion exchange membrane prevents cross-migration, maintaining extreme purity.
*Sodium ions (Na⁺) migrate selectively across the membrane to combine with hydroxide ions, yielding high-purity NaOH solution.
Main Process Sections
1. Brine Preparation and Purification System
Saturated brine requires strict multi-stage treatment because trace metal ions damage membranes and disrupt cell operation.
Process Steps: Salt Dissolution ➔ Primary Purification (removes Ca, Mg, Fe, and solids) ➔ Secondary Purification (ion exchange columns for trace removals).
Core Equipment: Salt dissolving/storage tanks, brine pumps, clarifiers, filters, ion exchange columns.
2. Membrane Electrolyzer System
Converts massive input electrical energy directly into chemical energy within high-tech stacks.
Hardware Stack: Membrane cell stacks, electrodes, bipolar plates, gas-liquid separators, loop systems, DC rectifiers.
Monitored Metrics: Current density, cell voltage, brine/NaOH concentration, temperature, flow rate. (Controls capacity, consumption, membrane life, and quality)
3. Caustic Soda Processing System
Evaporation loops safely drive off water while optimizing total steam consumption and guarding against aggressive corrosion.
Equipment: Evaporators, heat exchangers, steam systems, vacuum equipment, storage infrastructure.
4. Chlorine Treatment System
Cooling, intense drying, and compression prepare corrosive chlorine for storage or down-stream transport.
Downstream: PVC manufacturing, hydrochloric acid, sodium hypochlorite, water chemicals.
5. Hydrogen Treatment System
Processes cathode hydrogen through cooling and meticulous pressure management under constant safety monitoring.
Downstream: Hydrochloric acid synthesis, chemical production, clean industrial fuel.
Major Equipment List
| Process Section | Main Equipment |
|---|---|
| Brine System | Salt dissolver, purification equipment, filtration units |
| Electrolysis System | Membrane cells, DC rectifiers, loop circulation pumps |
| NaOH System | Evaporator units, process heat exchangers, storage tanks |
| Chlorine System | Drying towers, cooling packages, heavy compressors |
| Hydrogen System | Gas-liquid separators, dedicated cooling systems |
| Automation | Central DCS control system infrastructure |
| Utilities | Steam boilers, cooling water loops, compressed air stations |
FAQ：
1. What is the working principle of a membrane cell caustic soda plant?
A membrane cell caustic soda plant uses an ion exchange membrane electrolyzer to separate sodium chloride (NaCl) into sodium hydroxide (NaOH), chlorine gas (Cl₂), and hydrogen gas (H₂).
During operation, purified brine enters the anode chamber, where chloride ions generate chlorine gas. Water enters the cathode chamber, where hydrogen gas and hydroxide ions are produced. Sodium ions pass through the membrane and combine with hydroxide ions to form caustic soda solution.
2. What are the advantages of membrane cell technology compared with mercury cell technology?
Membrane cell technology provides several technical advantages:
No mercury pollution risk
Lower environmental impact
Higher sodium hydroxide purity
Lower salt consumption
Better energy efficiency
Suitable for modern large-scale chlor-alkali plants
Due to these advantages, membrane cells are currently the preferred technology for new caustic soda production facilities.
3. What is the role of the ion exchange membrane in a caustic soda plant?
The ion exchange membrane separates the anode and cathode compartments while allowing sodium ions to migrate through.
Its main functions are:
Preventing chlorine and hydrogen mixing
Preventing chlorine and hydroxide side reactions
Maintaining high NaOH purity
Improving current efficiency
The membrane performance directly affects plant capacity and energy consumption.
Hot Tags: membrane cell caustic soda plant, China, manufacturers, suppliers, factory, wholesale, price, profession, cost
