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High efficient Double effect crystallization system for multiple salts

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Jiangsu Hanpu Mechanical Technology Co., Ltd

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High efficient Double effect crystallization system for multiple salts

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Brand Name :	Hanpu
Model Number :	MVR
Certification :	CE ISO
Price :	USD18,0000-USD65,0000
Supply Ability :	1sets per months
Delivery Time :	45-60 working days

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High efficient Double effect crystallization system for multiple salts

High-Efficient Double-Effect Crystallization System for Multiple Salts

Hanpu designs and supplies double-effect evaporation & vacuum crystallization systems for multi-salt applications such as NaCl, KCl, (NH₄)₂SO₄, Na₂SO₄, sodium acetate, and mixed brines. Our compact two-effect layout delivers strong energy savings, precise crystal size control, and reliable operation for both new plants and brownfield upgrades.

Double-effect crystallization skid with vacuum system

Evaporation and separation modules in stainless steel

Technology Parameters

Model	DE-500	DE-1000	DE-1500	DE-2000
Evaporation (kg/h)	500	1000	1500	2000
Steam Consumption (kg/h)	≤250	≤500	≤750	≤1000
Dimensions L×W×H (m)	4×1.5×3.3	5×1.6×3.5	6×1.6×3.7	6.5×1.7×4.3
Cycle Water Consumption (t/h)	6	12	15	18

Operating Ranges (common to all models)
Evaporation Temperature — First Effect (°C)	80–90
Evaporation Temperature — Second Effect (°C)	55–70
Vacuum — First Effect (MPa)	0.02–0.04
Vacuum — Second Effect (MPa)	0.05–0.06
Steam Pressure (MPa)	<0.25
Concentration Ratio	1.2–1.3

Energy Efficiency

Typical steam economy of ~1.8–2.2 kg water/kg live steam (higher with TVR), cutting utility cost vs. single-effect systems.

Crystal Quality

Tight control of supersaturation, magma density, residence time, and seeding to hit target PSD and purity.

Low Fouling & Easy CIP

Optimized velocities and heat flux reduce scaling on heat surfaces; automated CIP quickly restores U-value.

Flexible to Multiple Salts

Process recipes switchable for chloride, sulfate, phosphate, and acetate systems; compatible with upstream RO/NF and downstream centrifuges/dryers.

How the Double-Effect Crystallization Works

Preheat & Deaerate: Feed is preheated using condensate/flash vapors; non-condensables removed to stabilize boiling points.
Effect 1 (Higher T/P): Falling-film or forced-circulation evaporation raises concentration near the metastable zone.
Effect 2 (Lower T/P, Vacuum): Secondary vapor from Effect 1 heats Effect 2; controlled flash cooling and/or evaporative cooling develop supersaturation.
Crystallizer: OSLO/FC or draft-tube-baffle configuration manages magma density and growth, limiting fines.
Solid–Liquid Separation: Centrifuge or pressure filter recovers crystals; mother liquor is recycled or purged based on impurity build-up.
CIP & Turnaround: Automated alkaline/acid cycles with conductivity endpoints; short downtime between campaigns.

Delivery Workflow

Feed analysis & targets → Thermal design & heat/mass balance → Pilot validation (as needed) → Detailed engineering → Fabrication & FAT → Installation & commissioning → Performance testing & training → Lifecycle service & spares.

Performance figures are indicative. Final design is confirmed by laboratory data, BPE/viscosity curves, corrosion/scaling assessment, and site utility conditions.

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