China Sea Salt Evaporation Equipment Suppliers & Service

1. Industrial Landscape of Sea Salt Evaporation Processes

Global sea salt recovery has transitioned from solar salt marshes to highly engineered mechanical thermal systems to satisfy pure culinary, medical, and industrial grade requirements. Industrial sea salt evaporation requires the extraction of pure sodium chloride (NaCl) from natural seawater or industrial brine reserves while managing chemical impurities such as magnesium chloride, calcium sulfate, and potassium salts. The optimization of evaporation plants relies on accurate temperature management and dynamic control of crystallization kinematics.

Advanced salt crystallization is performed via vacuum evaporators to achieve strict crystal sizing distributions and high chemical purity. Natural solar evaporation relies heavily on weather variations, whereas closed-loop mechanical systems allow continuous, multi-effect or mechanical vapor recompression processing. Utilizing state-of-the-art evaporation equipment mitigates organic contamination, minimizes environmental waste discharge, and limits specific thermal energy consumption per ton of crystallised output.

Thermal Concentration & Energy Dynamics

The vaporization of large quantities of water from highly saline solutions demands significant latent heat of vaporization. Modern industrial facilities employ advanced methodologies to capture, compress, and reuse steam. By integrating design principles from multi-effect evaporation and Mechanical Vapor Recompression (MVR), the specific steam demand can be drastically reduced, transforming the economic model of large-scale salt refineries globally.

2. Technical Route Comparison: MVR vs. Multi-Effect Evaporation

Choosing the correct equipment configurations involves analyzing thermodynamic parameters, electricity tariffs, and available local waste heat resources. The two primary industry paradigms for industrial sea salt concentration are Multi-Effect Evaporation (MEE) and Mechanical Vapor Recompression (MVR):

Forced Circulation vs. Falling Film in Brine Operations

Forced circulation evaporators are ideal for salt crystallization. Highly concentrated slurry is pumped through heat exchanger tubes at high velocities, preventing scale deposition on heat transfer surfaces. Evaporation occurs inside a flash separator vessel rather than on the exchanger surfaces. Conversely, falling film systems are utilized for pre-concentration steps where liquid viscosities remain low and crystals have not yet precipitated, optimizing capital cost and overall heat transfer coefficients.

3. Global Sourcing & Procurement Demands for Salt Evaporators

Global procurement teams analyzing salt evaporation systems face complex operational, structural, and regulatory criteria. Because the system operates in a highly corrosive environment containing hot, saturated sodium chloride, engineering specifications must be meticulously reviewed to ensure operational reliability.

Key procurement focus areas include:

• Metallurgy and Corrosion Lifetime: Standard stainless steel (SUS304 or SUS316L) will experience rapid pitting corrosion and stress corrosion cracking (SCC) under chloride conditions. Procurement guidelines specify Titanium Gr. 2, Titanium Gr. 12, Hastelloy, and Duplex Stainless Steels (such as 2205 or 2507) for heated zones.
• Total Cost of Ownership (TCO): Low initial purchase price of equipment is often outweighed by high energy consumption. High-efficiency thermal separation systems like MVR require high capital investment but lower the operational cost within 18–24 months.
• Scale Control Systems: Thermal design must include advanced scale mitigation, automated Clean-In-Place (CIP) loops, and chemical dosing systems to limit gypsum (CaSO4) and silica fouling.

4. Manufacturing Excellence & Evolution Profile

Jiangsu Zongheng Concentrating and Drying Equipment Co., Ltd. (formerly Yixing Yangxi Light Industry Machinery Factory), established in 1992, is situated in Zhoutie Town, Yixing City, on the shores of Taihu Lake. Since its founding, the company has evolved into a modern, high-tech production facility specializing in evaporator, industrial dryer, starch processing, and high-pressure vessel manufacturing. The factory encompasses over 54,000 square meters, with more than 22,000 square meters of dedicated processing workshop area.

Our team includes 3 senior engineers, over 20 professional and assistant engineers, and a total staff of 120 technicians. We design and manufacture concentration, drying, starch refining, alcohol DDGS, and Category III medium and low-pressure vessels, providing custom engineering and localized service to the chemical, pharmaceutical, and wastewater treatment industries.