Effect Ⅱ Nickel Evaporator Cyclonic Separator

The Effect II Nickel Evaporator with Cyclonic Separator is a key unit in chlor-alkali plants, designed to concentrate brine (NaOH solution) prior to electrolysis for the production of chlorine and caustic soda.

Operating under vacuum conditions and using steam as the heating source, the system efficiently removes water from the brine. The integrated cyclonic separator minimizes scaling and fouling by continuously removing suspended solids and impurities, ensuring stable long-term operation.

Working Principle

Vacuum Evaporation:
Brine solution is heated by steam under reduced pressure, lowering the boiling point and improving energy efficiency.

Concentration Process:
Water is evaporated, increasing NaOH concentration from approximately 32% to 50%.

Cyclonic Separation:

A vortex flow is generated inside the separator

Centrifugal force drives solids outward

Impurities collect in the sedimentation zone

Clean, concentrated brine exits from the center

This ensures high-purity feedstock for downstream electrolytic cells.

Key Features

High Evaporation Efficiency
Optimized for multi-effect evaporation systems

Integrated Cyclonic Separator
Reduces fouling, scaling, and maintenance

Vacuum Operation (-0.04 MPa)
Enhances thermal efficiency and reduces energy consumption

Nickel 201 Construction
Excellent resistance to strong alkali (NaOH) corrosion

Stable Continuous Operation
Suitable for large-scale chlor-alkali production

Low Maintenance Costs
Extended equipment lifespan

Technical Specifications

Equipment Structure

Main Components

• Evaporator Shell

  Size: DN1200 × 4 mm

Height: 2500 mm

Material: Nickel 201

• Cyclonic Separator

  High-efficiency solid-liquid separation

Prevents scaling on heat transfer surfaces

• Heating System

  Steam heating (external)

• Sedimentation Chamber

  Collects separated impurities

Advantages of Cyclonic Separation

Continuous removal of suspended solids

Reduced scaling and fouling

Improved heat transfer efficiency

Lower cleaning frequency

Increased operational reliability

Applications

Chlor-Alkali Industry

Brine concentration systems

Caustic soda (NaOH) production

Chlorine generation processes

Chemical Industry

Alkaline solution concentration

Impurity removal in process streams

Important Technical Note

The nickel evaporator does not function as a membrane device.
Separation of water vapor and salts occurs through thermal evaporation, not membrane electrolysis. The system is designed for phase change (liquid → vapor), while dissolved salts remain in the liquid phase.

Why Choose Nickel 201?

Outstanding resistance to caustic alkali (NaOH)

Stable performance at elevated temperatures

Excellent corrosion resistance in chlor-alkali environments

Long service life with minimal degradation

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