Ohm Engineers designs forced-circulation multi-effect evaporators (MEE) and TVR-integrated concentration trains for industrial effluent and ZLD pathways — positioning TVR where steam is available versus mechanical vapor recompression (MVR) when electricity is the preferred utility.
Thermal design from process data · TVR thermocompressor integration
Effluent concentration and ZLDSugar and molasses concentrationSalt manufacturingDairy product concentrationPharmaceutical liquid concentration
Working principle
Multi-effect evaporation and TVR
Vapour from one effect heats the next at a lower pressure, concentrating effluent in stages. Thermal vapor recompression recycles vapour enthalpy via a steam jet thermocompressor, reducing live steam demand versus standalone MEE.
Our multi-effect evaporator (MEE) systems achieve high energy efficiency by reusing steam vapour across multiple effects. Used extensively for concentrating liquid effluents, producing ZLD (zero liquid discharge), recovering valuable materials from dilute streams, and concentrating food & pharmaceutical products. We design 2-effect to 7-effect systems with falling film, forced circulation, or rising film evaporator bodies.
Operating envelope
Engineering specification matrix
Indicative ranges for RFQ discussion — not guaranteed catalogue limits.
Design parameter
Standard range
Heavy duty / custom
Compliance
Concentration ratio
Per process simulation
ZLD train integration
Client mass balance
Effects
2 to 5 effects typical
Custom circulation design
Fouling / viscosity on RFQ
TVR
Steam jet thermocompressor
Hybrid MEE + TVR
Utility survey
Metallurgy
Materials & chemical compatibility
Material of construction is taken from the purchaser datasheet and feed corrosion profile — not assumed from a catalogue default. Mill test certificates for pressure-boundary materials are supplied per the agreed ITP.
Material
01
SS 316L
Chemical and effluent concentration
Material
02
Duplex / Titanium
When specified for chloride service
Also quoted when specified
SS 316LSS 304Carbon SteelOther alloys when specified
Design standards
ASME (when specified)IS 2825 (when specified)
Documentation
MTC for pressure parts
As-built drawings
Hydro test records
Fabrication
Built for this product at Vadodara
Calandria, vapour bodies and condensers built at Vadodara; circulation pumps by buyer or as specified.
What is the steam economy of a multi-effect evaporator?
Steam economy depends on the number of effects, boiling-point elevation and the heat-and-material balance. We do not publish a single catalogue economy. Send feed rate, concentrations and available steam so the train can be engineered.
Can MEE systems be used for zero liquid discharge (ZLD)?
Yes. Multi-effect evaporators are a core component of ZLD systems, concentrating effluent for final crystallization or evaporation to dryness. We design complete ZLD trains.
TVR vs MVR for ZLD?
TVR uses motive steam to recompress vapour — attractive when HP steam is available. MVR uses electrical drives. We size TVR packages when the enquiry defines steam conditions; we do not assume a single ZLD architecture.
Engineering RFQ
Request an engineering quotation — Multi Effect Evaporators
Process parameters below help our engineers qualify the duty before reply. Or email info@ohmengineers.co.in · +91 83470 19128/22