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Energy Saving MVR Evaporator PLC Engine Zero Liquid Discharge Wastewater

Categories MVR Evaporator
Brand Name: HANPU
Model Number: MVR
Certification: CE,ISO9001
Place of Origin: Jiangsu,China
MOQ: 1 set
Price: 300,000USD~2,500,000USD/SET
Payment Terms: T/T,L/C,D/A,D/P,Western Union
Supply Ability: 1 set/month
Delivery Time: 90 days
Packaging Details: Bulk with strong strap
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Energy Saving MVR Evaporator PLC Engine Zero Liquid Discharge Wastewater

Energy Saving MVR Evaporator — PLC Engine · Zero Liquid Discharge Wastewater
Energy-saving MVR evaporator with PLC control for ZLD wastewater concentration

Engineer-to-order MVR (Mechanical Vapor Recompression) evaporator for ZLD wastewater trains. The system recycles latent heat via mechanical recompression to minimize utilities, while a PLC control engine orchestrates continuous, unattended operation—delivering low OPEX, high recovery, and compliant discharge as solids.

Key Benefits
  • Energy saving: Electric-driven MVR slashes fresh-steam demand after start-up.
  • ZLD-ready: Deep concentration to crystallizer/centrifuge/dryer for zero liquid discharge.
  • Smart automation: PLC/HMI with recipes, alarms, historian, remote diagnostics, and load following.
  • Stable operation: Vacuum low-ΔT duty, optimized ΔT/LMTD and velocity to reduce fouling and foaming.
  • Durable materials: SS316L/duplex (Ti/Hastelloy optional) for corrosive brines and chemicals.
Process & Thermal Economy

Secondary vapor is mechanically compressed to elevate saturation temperature and reused as the heating medium. Tight control of pressure, ΔT, circulation rate, and residence time keeps coefficients high and specific energy low, producing condensate suitable for reuse after polishing.

PLC Control & Safety

Closed-loop control of level/pressure/temperature/conductivity; interlocks for compressor/VFD, vacuum and NCG handling, heater duty, and condensate quality guard. Event/alarm historian and secure remote support enable 24/7 uptime.

Process Overview — ZLD Wastewater
Flow: feed conditioning → MVR evaporation (vacuum) → condensate polishing (reuse) → crystallizer → centrifuge/dryer → solids discharge
  • Feed conditioning: screening/filtration, softening or pH trim; antiscalant to limit Ca/Mg/Si scale.
  • MVR evaporation (vacuum): falling film or forced circulation; compressor discharge sets ΔT/capacity.
  • Condensate polishing: filters/RO/AC to reuse or discharge spec (conductivity/TOC guard).
  • Crystallization & solids: DTB/OSLO or FC crystallizer → centrifuge/dryer → compliant solid disposal or recovery.
  • Automation: PLC recipes for start/stop, CIP windows, and load-following with VFDs.
Key Components
  • MVR evaporator body (falling film / forced circulation) with vapor–liquid separator
  • Mechanical vapor compressor (turbo/Roots) with VFD
  • Surface condenser, vacuum/NCG skid, preheaters/heat recovery HX
  • PLC/HMI/SCADA; instrumentation (T/P/flow/cond/level); alarm & historian
  • CIP skid; antiscalant dosing; optional condensate polishing filters/RO
Performance & Sizing
ParameterTypical Range*
OperationContinuous, 24/7 (vacuum duty)
Electric use (MVR)~15–40 kWh per ton of water evaporated
Fresh steam demandVery low after start-up (backup/ancillary only)
Turndown50–100% with stable ΔT and quality
MaterialsSS316L / duplex; Ti/Hastelloy on request

*Actual performance depends on feed salinity/COD, fouling tendency, compression ratio, and heat-exchanger design.

FAQ
Can this integrate after membranes for ZLD?

Yes. RO/NF pre-concentration upstream with MVR + crystallizer downstream is a standard ZLD configuration.

How is scaling managed?

Through pretreatment, optimized ΔT/LMTD and velocity, antiscalant dosing, and scheduled CIP based on fouling indicators.

What condensate quality is achievable?

Low conductivity/TOC; polishing enables reuse within the plant, reducing freshwater intake.

Application
Applications: high-salinity wastewater reduction, chemical brine concentration, and zero liquid discharge
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