Inorganic Salt Evaporation LTE Tubular Evaporator Crystallizer Equipment
The LTE tubular evaporator crystallizer is a highly efficient evaporation and crystallization device widely used in chemical, pharmaceutical, food, and environmental protection industries, especially suitable for heat-sensitive materials or processes requiring continuous crystallization. The following is an introduction from four aspects: structural principle, core features, workflow, and application areas.
Structure and Working Principle
This equipment mainly consists of a tubular heater, evaporation chamber, crystallization separator, circulating pump, and condensation system. The material flows inside the tube, while heating steam heats the material outside the tube, forming rising or falling film evaporation. The concentrated liquid after evaporation enters the crystallization separation zone, where the solute reaches a supersaturated state and crystals precipitate by controlling the temperature gradient and residence time. Its unique feature is the integration of the evaporation and crystallization processes into the same system, utilizing a tubular heat exchange structure to achieve highly efficient heat transfer.
Core Features
1. High Heat Transfer Efficiency: The tubular structure provides a large heat exchange area, and the turbulent flow enhances the heat transfer coefficient, resulting in significant energy savings.
2. Stable Continuous Operation: The material circulates within a closed system, enabling continuous feeding and discharging, resulting in high production efficiency and uniform product quality.
3. Controllable Crystal Particle Size: By precisely controlling the evaporation rate, circulation flow rate, and slurry density, crystal products with the target particle size distribution can be obtained.
4. Wide Applicability: Suitable for materials of various viscosities; for heat-sensitive substances, low-temperature vacuum operation can be used to reduce the risk of decomposition and deterioration.
5. High Degree of Automation: Equipped with a DCS or PLC control system, it can monitor parameters such as temperature, pressure, and liquid level in real time.
Work Process: The raw material liquid is preheated and then enters the tubular heater, where it evaporates to generate secondary steam. The concentrated liquid enters the crystallizer. In the crystallization zone, the supersaturated solution grows around the seed crystals or suspended crystals. The slurry is returned to the heater or discharged from the system by a circulation pump. The secondary steam is condensed and recovered, and the solvent can be recycled.
Application Areas: Mainly used for the crystallization of inorganic salts such as sodium chloride and ammonium sulfate, as well as the refining of biological products such as citric acid and amino acids. It also has important applications in the fields of zero wastewater discharge and resource recovery.
This equipment achieves efficient utilization of energy and materials by optimizing the heat transfer and crystallization coupling process, making it an important piece of equipment in modern evaporation crystallization processes.
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