in the era resource revolution - mission...
TRANSCRIPT
of the resource
revolution
in the era
Himanshu Gupta Sales Director (South Asia)
supporting your growth
Technologies for Power Plant
Challenges for Power Plant of Today`
- Improve Water Efficiency
- Environmentally complaint
- Handling Waste & Management
Technologies for improving water efficiencies
Existing Technologies need extensions`
- Cooling Tower blow down is being recycled with Clarifier + UF + RO
with recoveries of 80-85%
- Power producers / engineers and consultants must ask for better
efficiencies – 92% - 95% - 98% are possible
- Integrated flow sheets are getting prepared and implemented in
country with very high efficiencies
- Proveness is must / Low life cycle cost should be non negotiable
- Overall water and mass balance should be prepared
1950 1960 1970 1980 1990 2000
1948 - Ionics develops
ion exchange membranes
1954 – ED Technology is
developed
1970 - Ionics introduces
reversal process to Electrodialysis
1997 – Introduction of
Ionics EDR 2020 System
EDR Timelines`
Electrodialysis
An electrochemical separation process in
which ions are transferred through ion
exchange membranes by means of a DC
voltage
Electrodialysis Reversal
A continuous self-cleaning electrodialysis
process by means of periodic reversal of
the DC polarity, switching concentrating
and diluting flow streams
What is Electrodialysis Reversal`
Cathode (-)
Anode (+)
Streams in EDR Process`
Feed
Product
STAGE
1
+ + + + + +
- - -
STAGE
2
+ + +
- - -
STAGE
3
- - -
+ + +
- - -
STAGE
450% 75% 87.5% 94 %
Optimal Salt Removal (50-94%)`
• Minimizes need for continuous chemical feeds
• Automatically cleans electrodes with acid formed during anodic operation
Why Polarity Reversal`
Mineral scale and colloids can accumulate
on the membrane surface during normal
operation.
Reversing the applied voltage cleans the
membrane surface of colloids and mineral scale.
This reduces antiscalant use and CIP frequency.
Technologies for reusing Treated Sewage water for cooling Tower
New Source – Treated Sewage`
- Treated Sewage water has high Organics, Ammonia, Seasonal
Variations
- Organics & Ammonia needs to bring down to lowest level
- Proveness is must / Low life cycle cost should be non negotiable
SUEZ Water Technologies & Solutions 13 I
Influent Pretreatment Effluent
Membrane filtration
Biological treatment
Mixed liquor recycle
MBR – Membrane Bio Reactor `
Activated
Sludge
Process
Stable Biological
Treatment Process
Membrane
Filtration
Absolute Solids
Separation
MBR
Advantages of MBR technology:
➢ Full biomass retention
➢ High MLSS concentrations
➢ Reduced bioreactor volumes
➢ “Specialist“ growth possible
➢ High (long) SRTs
➢ Better effluent quality
SUEZ Water Technologies & Solutions14 I
MBR – Membrane Bio Reactor `
o Strongest fiber in the industry
o Single fiber can hold over 50 kg
o Majority of modules ever installed are still in
service (first membrane installed in 1993)
o Widest range of solids tolerance
o From <1 mg/L TSS to >50,000 mg/L MLSS
(sludge thickening)
o Ability to handle water quality upsets
7 kg bowling ball!
ZeeWeed®
Membrane
SUEZ Water Technologies & Solutions15 I
ZeeWeed 500D – Most Robust Product`
SUEZ Water Technologies & Solutions16 I
How SUEZ MBR‘s are made`
Technologies for handling last bit of BAD Water
Cooling tower blowdown
Demineralizer waste
Process wastewater
Ash pond blowdown
Scrubber blowdown
Plant drains
FGD Blowdown
Gasification wastes
Boiler blowdown
Reverse osmosis reject
Electrodialysis reject ZLD systems have been widely used & proven since early 1970’s
Power Waste Streams Treated by ZLD`
Cooling Tower
Blow-Down
ZLD Brine
Concentrators
& Mixed Salt
Crystallizer at
USA Power
Station
• ZLD typically requires thermal or evaporative technologies to achieve solids and max recovery of water
• Evaporation is generally expensive and has high power requirement
• Pre-concentration enables reduction in size/capacity and therefore capex and opex of evaporator and crystallizer units
• ZLD systems integrate both conventional and membrane systems to pre-concentrate wastewater prior to thermal systems
ZLD – Zero Liquid Discharge`
Evaporation Crystallization Dewatering
ZLD – Zero Liquid Discharge - Scheme`
Used in waste water treatment to reduce the volume of waste and produce high quality distilled water as a product
Seeded slurry technology allows concentration without scaling of surfaces
Use Vapor Compression to reduce energy consumption, either using steam (TVR) or mechanical (MVR)
Good candidate streams are waste waters that are usually high in TDS
Capacities from 2 - 275 m3/hr evaporation in a single unit
Specific power consumption of 13 - 26 kWh/m3
Recoveries of 75%-99% (CF=4x-100x)
High Distillate quality of <50 mg/l TDS for reuse Seeded Slurry Technology uses preferential precipitation of calcium sulfate upon existing seed crystals and silica to prevent scaling of heat surfaces.
ZLD – Evaporators (Brine Concentrators)`
• Evaporates highly concentrated waste water (such as Brine Concentrator blowdown) to produce dry solids
• Typically forced circulation
• Either MVR or steam driven
• Crystallize either Mixed Salt
• Ideal for waste waters >60,000 ppm
• Solids are harvested from the crystallizer by filter press, centrifuge or dryer
• Capacities from 0.5 - 115 m3/hr of evaporation in a single unit
• Specific power consumption of 32 to 65 kWh/m3 of evaporation
• Recoveries of 65%-85%
• Produce distillate quality of < 50 mg/l TDS
ZLD – Crystallizers`
Cooling tower blowdown
Demineralizer waste
Process wastewater
Ash pond blowdown
Scrubber blowdown
Plant drains
FGD Blowdown
Gasification wastes
Boiler blowdown
Reverse osmosis reject
Electrodialysis reject ZLD systems have been widely used & proven since early 1970’s
Power Waste Streams Treated by ZLD`
Huntington, UT
1974Operated for 30 years
(New Thermal Products
Unit installed in 2005)
San Juan, NM
1974Still Operating
Pawnee Station,
CO
1980Still Operating
Proven Reliability at Power Stations`
250 drinking water and wastewater treatment plants built
50 water plants under Operation & Management
44 million people benefiting of drinking water supply
5,5 billion of liters of drinking water per day
15 million people benefit from network O&M
8,000 invisible leaks identified
6,000 km of underground distribution network mapped by GIS
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N°1 industrial water company in the region
>450 projects executed
4 factories comprising membrane rolling, equipment fabrication and
chemical blending
1 Center of Excellence for engineering supporting global projects
50% of existing oil refineries rely on water/wastewater plants built by SUEZ
10% turnover annual growth
Staff: 1200 employees
25 I
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30 years of presence in India
SUEZ in India
Water plants
Water services
Industry
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