Evaporators

Evaporators are equipment designed to separate water from a solution containing chemical and physical components. The system operates based on the principle of evaporation and the application of heat energy. It plays a crucial role across various industrial and environmental sectors.

Applications in Industry:

• Food and beverage
• Pharmaceuticals
• Cosmetics and chemicals
• Mining and mineral processing
• Energy and other manufacturing industries
• Applications in Environmental Treatment:
• Medium and small-scale wastewater treatment
• Wastewater recycling and reuse
• Efficient solutions for liquid-free wastewater treatment

We provide both standardized evaporator systems and customized manufacturing according to client requirements. Some of the product lines supplied by Thinh Vuong Technical Services (TVTS) include:

Crystallizer Equipment

Crystallizers are specialized systems used to produce solid crystals from liquid or solution phases. They play a crucial role in various industrial processes, serving as an advanced separation and purification method. At Thinh Vuong Technical Services (TVTS), crystallizers are often integrated or upgraded from evaporator systems to achieve both concentration and crystal recovery in one continuous process.

1. Working Principle

The crystallization process begins when a solution reaches its saturation point, causing dissolved particles to form solid crystals. It typically occurs in two main stages:

• Stage 1 – Nucleation: Molecular clusters form the initial “nuclei” or seed crystals.
• Stage 2 – Crystal Growth: Once nuclei form, dissolved molecules continue to deposit on them, growing into larger, well-defined crystals.

2. Types of Crystallizers

Several crystallizer designs are applied depending on process needs: Agitated Crystallizer: Uses mechanical stirring to maintain saturation and enhance crystal formation. Vacuum Crystallizer: Reduces system pressure to lower boiling point and improve crystallization efficiency at lower temperatures. Cooling Crystallizer: Cools the solution to decrease solubility and promote crystal formation. Evaporative Crystallizer: Utilizes heat to evaporate water or solvent, increasing solute concentration to induce crystallization. Many modern systems are hybrid evaporative crystallizers, upgraded from MEE or MVR evaporators for higher energy efficiency and solid recovery.

3. Industrial Applications

Crystallizers are widely applied in both manufacturing and environmental industries, including: Food & Beverage: Crystallizing sugar, salt, citric acid, dairy products, and additives. Chemical: Refining and concentrating compounds such as sodium chloride, sulfuric acid, and inorganic salts. Pharmaceutical: Producing high-purity active ingredients and intermediates. Energy: Extracting salts from seawater or brine in desalination systems. Mining & Metallurgy: Recovering minerals and metals such as copper and zinc from process solutions.

4. Advantages

High separation and purity efficiency – produces crystals with consistent quality. Energy saving – advanced systems recover and reuse heat from evaporation or cooling processes. Controllable crystal size – operators can adjust parameters such as temperature, agitation, and evaporation rate.

5. Limitations & Challenges

High capital cost: Due to complex design and energy requirements. Maintenance complexity: Precision control and moving parts demand skilled operation and regular maintenance.

6. Key Factors Affecting Crystallization

Parameter Impact on Process Temperature Determines solubility and crystallization rate Evaporation rate Higher rates accelerate crystallization Agitation speed Influences crystal size and uniformity Degree of saturation Crystallization occurs when saturation or supersaturation is reached