PRESENTING NEW LOW ENERGY EVAPORATION TECHNOLOGY ON LIQUID WASTE FOR ZERO LIQUID DISCHARGE By at TWO DAY NATIONAL WORKSHOP CUM TECHNOLOGY EXHIBITION FOR PROMOTING INDUSTRIAL ENERGY EFFICIENCY 7th - 8th November, 2016 By
Cations (e.g. heavy metals) Monovalent ions Multivalent ions Complexed ions Anions Monovalent (e.g. chloride) Ammonium Organic compounds Carbohydrates Proteins Alcohols Solvents (e.g. hydrocarbons) Pigments Pesticides COD in general APPLICABILITY OF DIFFRENT WATER TREATMENT TECHNOLOGIES 3 = high separation 2 = moderate 1 = low separation Note! ph may change rating considerably Dissolved substances Pollutant to remove Technology Adsorption (e.g. activated carbon) 1 1 1 1 1 1 1 3 3 3 1 Ion exchange 3 3 3 3 2 Chemical precipitation 1 2 3 2 2 1 Membrane technologies Ultrafiltration (UF) 2 1 1 Nanofiltration (NF) 2 3 2 2 3 2 3 2 Reverse osmosis (RO) 3 3 3 3 3 1 3 3 1 3 3 3 Electrodialysis 3 3 3 3 3 3 Evaporation 3 3 3 3 3 2 3 3 3 3 3 Distillation 3 3 3 Flotation 1 1 2 2 2 1 1 Air/steam stripping 3 2 3 2 Electrical methods Electrolyse 3 3 3 Electro coagulation 1 3 3 2 2 2 2 Biological treatment 1 1 2 1 1 2 3 3 3 1 2 1 2 Multivalent (e.g. SO4 2- ) Methods have often to be combined for zero discharge operation or to meet discharge limits
EVAPORATION NATURE S PURIFICATION METHOD
ZERO DISCHARGE SYSTEM BY EVAPORATION PROCESS MAKE UP WATER WASTE WATER CLEAN WATER PRETREATMENT EVAPORATION CONCENTRATE RE USE OR DISPOSAL
SINGLE EFFECT EVAPORATION Specific Steam Consumption = 1.1 Vapour Cooling Water CONDENSER Condensate 1.0 Steam 1.1 Feed Concentrate Primary Condensate
4-EFFECT MULTI-EFFECT EVAPORATION Specific Steam Consumption = 0.28 CONDENSER Vapour Cooling Water Feed Steam Vapour Vapour Vapour Vapour Waste Heat Concentrate Primary Condensate Condensate
MECHANICAL VAPOR RECOMPRESSION EVAPORATION COMPRESSOR P = C x MF x DT P = Fan Power Use (kw) C = Constant (2,5 3) MF = Vapor mass flow (ton/h) DT = Temp. difference ( C) Compressed Vapor DT Vapor Steam consumption ~ 0 Cooling water cons. ~ 0 Feed Concentrate Condensate
ARVIND ENVISOL INTRODUCES NEW EVAPORATION TECHNOLOGY USING LOW ENERGY POLYMERIC FILM AS HEAT TRANSFER MEDIA
POLYMERIC FILM EVAPORATION TECHNOLOGY Low cost Evaporative surface o large heat transfer surface o small temperature difference o low energy use - typically 10 to 15 kwh per m 3 of purified water Efficient production of polymeric heat exchanger elements by new machine (1,5 million m 2 /year) 9
Heat transfer coefficient, U W/m 2o C OVERALL HEAT TRANSFER COEFFICIENT AS FUNCTION OF WALL THICKNESS 3000 2500 2000 1500 1000 500 0 1,2 1 0,8 0,6 0,4 0,2 0 Wall thickness, mm SS 316 PE 10
LIQUID DISTRIBUTION ON POLYMERIC HEAT EXCHANGER Uniform distribution of Liquid on the Surface of Polymeric Heat Exchanger
POLYMERIC EVAPORATIVE HEAT EXCHANGER CASSETTE 50 elements Surface area 200 m 2 Total weight 50 kg
OPERATION PRINCIPLE
TYPICAL EVAPORATOR LAY OUT (14 CASSETTES) LARGE DIAMETER UNIT (3.8 mtr.)
CONTAINER SIZE EVAPORATOR (10 CASSETTES) SMALL DIAMETER UNIT (2.4 mtr.)
INTERNAL ARRANGEMENT OF CASSETTES
MVR-FAN (HEART OF SYSTEM)
OPEX COMPARISON OF POLYMER MVR WITH CONVENTIONAL MEE & MVR Energy consumption (Power = Rs6/kWh, steam Re1 /kg) water Rs/m 3 clean New technology MVR (12 kwh/m3 + 10 kg/m3) 82 Conventional MVR (25 kwh/m3 + 20 kg/m3) 170 Conventional ME 1 stage (2 kwh/m3 +1100 kg/m3) 1112 Conventional ME 4 stage (3 kwh/m3 + 280 kg/m3) 298
COST COMPARISION OF SOME HEAT EXCHANGE MATERIALS Material Relative cost/m 2 AISI 316 51 x 1,0 mm tube (50 EUR/m 2 ) 1 254 SMO 51 x 1,25 mm tube 2,5 654 SMO 51 x 1,25 mm tube 4,9 Sanicro 28 51 x 1,8 mm tube 5,7 Hastelloy C276 51 x 1,0 mm tube 13 Titanium 50,8 x 0,9 mm tube 13 Polyolefin film 40 my (0,3 EUR/m 2 ) 0,006 High tech plastic film 0,06
TYPICAL APPLICATION AREAS Textile industry Steel and metal industry Mining industry Pulp & Paper Food and feed industry Landfill leachate Groundwater remediation Seawater desalination Chemical industry Electronic industry Power plants Pharma industry
MVRE PLANT (3 X 500 M3/D)
COPPER CABLE MANUFACTURING FROM COPPER EFFLUENT 350 M3/D Pickling basin Rinsing counter current Passivation Copper cable H 2 SO 4 Surface active agent Evaporator Condensate Concentrate Electrolyse Sulfuric acid H 2 SO 4 Copper
OUR VALUED CLIENTS Textile CETPs Tannery CETPs
THANK YOU! From:- Pradeep Samajdar Head-Business Development Email: pradeep.samajdar@arvind.in Mob:+917621077729