Forced Circulation Evaporator — High-Efficiency Anti-Fouling Evaporation System Product Overview The Forced Circulation Evaporator is an evaporation concentration system that uses an external circulation pump to drive high-velocity liquid flow, realizing efficient heat transfer and excellent anti-fouling performance. The circulation pump forces the feed liquid through the heating tubes at high speed. Sensible heat is absorbed without in-tube boiling the superheated liquid then flashes in the s
Forced Circulation Evaporator — High-Efficiency Anti-Fouling Evaporation System
The Forced Circulation Evaporator is an evaporation concentration system that uses an external circulation pump to drive high-velocity liquid flow, realizing efficient heat transfer and excellent anti-fouling performance. The circulation pump forces the feed liquid through the heating tubes at high speed. Sensible heat is absorbed without in-tube boiling; the superheated liquid then flashes in the separator, where vapor–liquid separation takes place and concentration or crystallization is completed. The system is particularly suitable for treating high-concentration, high-viscosity, scaling-prone, and solid-containing solutions, and is widely used in chemical, pharmaceutical, environmental protection, new energy, and food sectors.
After preheating, the feed liquid is pumped into the shell-and-tube heater. Under high flow velocity, the liquid absorbs heat while in-tube boiling is suppressed. The superheated liquid enters a separator chamber under negative pressure and flashes instantly, generating secondary vapor and completing concentration or crystallization. The secondary vapor can be directed to a condensing system or further utilized via a steam compressor. The un-evaporated concentrated liquid returns to the heater through the circulation loop until the target concentration is reached. The high circulation flow not only improves heat transfer efficiency but also effectively prevents scaling and crystal buildup inside the tubes.
Forced Circulation Pump: The key driving force, typically an axial-flow or mixed-flow pump with high flow rate and low head, ensuring sufficient velocity in the heating tubes to suppress scaling and crystal accumulation.
Heater: A shell-and-tube heat exchanger; the feed liquid flows inside the tubes and steam flows on the shell side. The heat exchanger is designed to avoid in-tube boiling, with tube material selected according to feed properties.
Separator / Crystallizer: Provides flash space and vapor–liquid separation; demisters and internal guiding structures can be incorporated for concentration or evaporative crystallization processes.
Vacuum System: Maintains the separator under negative pressure, lowering the operating temperature, especially beneficial for heat-sensitive materials or low-temperature evaporative crystallization.
Discharge System: Can be configured for continuous or batch discharge depending on process requirements, suitable for concentrated liquid or crystal slurry.
Outstanding Anti-Fouling Performance: High-velocity circulation effectively inhibits scaling and crystallization on heating tube walls, significantly extending cleaning cycles and continuous operation time.
Wide Applicability: Suitable for complex feed liquids including high-viscosity, scaling-prone, solid-containing, and heat-sensitive materials.
Stable Heat Transfer Efficiency: The circulation pump maintains stable velocity in heating tubes, ensuring high and slowly decaying heat transfer coefficients and reliable long-term evaporation efficiency.
Flexible Process Combinations: Can be configured as single-effect, multi-effect, or combined with an MVR system to further reduce energy consumption; can also be integrated with cooling crystallizers for integrated evaporative crystallization.
Reliable Automated Operation: Equipped with a PLC control system for real-time monitoring of flow velocity, temperature, liquid level, and concentration, ensuring stable, continuous, and safe operation.
Parameter Specification Range / Description |
Processing Capacity 0.5–80 t/h (customizable)
Energy Consumption per ton Depends on configuration (single-effect of evaporated water vs. MVR combined)
Operating Temperature 50–100 ℃ (vacuum to atmospheric, adjustable)
Circulation Pump Type Axial-flow or mixed-flow pump, high flow rate and low head
Material of Construction SS304/316L, 2205 Duplex SS, Titanium, Super Austenitic Stainless Steel, etc.
Control Mode PLC automatic control, remote monitoring supported
Applicable Solids Content Up to supersaturated crystal slurry discharge
Heat Exchanger Type Shell-and-tube, designed with tube-side pressure drop to prevent in-tube boiling
Chemical High-salinity and high-COD wastewater concentration, inorganic salt evaporative crystallization, corrosive liquid concentration
Pharmaceutical Pharma mother liquor concentration and crystallization, fermentation broth treatment, low-temperature concentration of heat-sensitive pharmaceuticals
Food & Beverage High-viscosity syrup concentration, seasoning and yeast liquid treatment, functional sugar concentration
Environmental FGD wastewater ZLD, landfill leachate Protection concentration, high-salinity industrial wastewater volume reduction
New Energy & Concentration and crystallization of lithium and Metallurgy Co-Ni-Mn battery material solutions, hydrometallurgical leach solution evaporation
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