state of the art gas absorption technologies may 5, 20091 cansolv technologies inc. cansolv so 2...

State of the Art Gas Absorption State of the Art Gas Absorption TechnologiesTechnologies

May 5, 2009 1

CANSOLV TECHNOLOGIES INC.CANSOLV TECHNOLOGIES INC.www.cansolv.comwww.cansolv.com

CANSOLV SOCANSOLV SO22 SCRUBBING SYSTEM: SCRUBBING SYSTEM:Review of Commercial ApplicationsReview of Commercial Applications

for Smelter SOfor Smelter SO22 Emissions Control Emissions Control

Presented at:Presented at:The Southern African Institute of Mining & MetallurgyThe Southern African Institute of Mining & Metallurgy

ZAMBIAZAMBIA

By: Valérie Léveillé, By: Valérie Léveillé, Eng.Eng.


May 5, 2009 2

OutlineOutline1.1. Overview of CTI;Overview of CTI;

2.2. Description of the SODescription of the SO22 technology; technology;

3.3. Review of commercial applications;Review of commercial applications;

4.4. Integration to smelter emissions Integration to smelter emissions

management.management.


May 5, 2009 3

Corporate ProfileCorporate Profile Cansolv Technologies Inc. (CTI) founded in 1997Cansolv Technologies Inc. (CTI) founded in 1997

– Headquarters in Montreal, CanadaHeadquarters in Montreal, Canada

– Technology acquired from Union CarbideTechnology acquired from Union Carbide

Cansolv Technologies Shenzhen (CTS) founded in 2004Cansolv Technologies Shenzhen (CTS) founded in 2004

– Chinese subsidiary for Sales/Marketing & Procurement in AsiaChinese subsidiary for Sales/Marketing & Procurement in Asia

Acquisition by Shell Global Solutions in December Acquisition by Shell Global Solutions in December

20082008

Chemical Initiatives appointed agents for Africa 2009Chemical Initiatives appointed agents for Africa 2009


May 5, 2009 4

Corporate ProfileCorporate Profile

SOSO22 Technology Technology

– 9 Cansolv SO9 Cansolv SO22 Scrubbing units in operation; Scrubbing units in operation;

– 5 Cansolv SO5 Cansolv SO22 Scrubbing units to start-up in 2009; Scrubbing units to start-up in 2009;

– 5 Cansolv SO5 Cansolv SO22 Scrubbing units to start-up in 2010; Scrubbing units to start-up in 2010;

COCO22 Technology Technology

– 3 Cansolv CO3 Cansolv CO22 Capture demo plants in detailed Capture demo plants in detailed

engineeringengineering

– Successful demonstration in 6 piloting campaignsSuccessful demonstration in 6 piloting campaigns


May 5, 2009 5

CANSOLVCANSOLV®® SO SO2 2 Scrubbing Scrubbing SystemSystem

A regenerable SOA regenerable SO22 absorption process absorption process

Similar to HSimilar to H22S/COS/CO22 amine treater units amine treater units

Aqueous diamine absorbent is highly selective for SOAqueous diamine absorbent is highly selective for SO22

Pure, water- saturated SOPure, water- saturated SO22 byproduct byproduct

Robust, easy to operate process with low emissionsRobust, easy to operate process with low emissions

Handles gas with varying SOHandles gas with varying SO22 concentrations concentrations

High tolerance for dust and SOHigh tolerance for dust and SO33/acid mist in gas/acid mist in gas


May 5, 2009 6

Cansolv® SO2 SCRUBBING SYSTEM – Integrated Configuration for Smelting Applications with new acid converter for SO2 by-product

Lean Amine Tank

Condensate

Caustic

Treated Offgas to stack< 200 ppmv SO2

APU

MakeupWater

Smelter OffgasSO2 Content: 0.1% to 15%

Quenched Offgas

Prescrubber Effluent

Rich AmineLean Amine

SO2 product gas, 99.99% basis, dry(constant flowrate)

SO2 Stripper Tower

APU Effluent

Rich Amine TankTreated Offgas to stack

< 50 ppmv SO2

Acid Plant Tail GasSO2 Content: 0.5%

Constant flowrate of H2SO4 to storage

Dilution air

Main SO2

Absorber Tower

AP SO2

Absorber Tower

SINGLE ABSORPTION ACID PLANT

Constant Flowrate and SO2

Content


Lean Amine Tank

Condensate

Caustic


APU

MakeupWater


Quenched Offgas




SO2 Stripper Tower

APU Effluent


< 50 ppmv SO2



Dilution air

Main SO2

Absorber Tower

AP SO2

Absorber Tower



Content


Lean Amine Tank

Condensate

Caustic


APU

MakeupWater


Quenched Offgas




SO2 Stripper Tower

APU Effluent


< 50 ppmv SO2



Dilution air

Main SO2

Absorber Tower

AP SO2

Absorber Tower



Content


May 5, 2009 7

Amine CharacteristicsAmine Characteristics

Amine developed for oxidised environmentsAmine developed for oxidised environments– Oxidation degradation losses per year < 2% of Oxidation degradation losses per year < 2% of

annual inventoryannual inventory Very low amine volatility (ppb levels)Very low amine volatility (ppb levels)

– Amine in salt form Amine in salt form undetectable losses with undetectable losses with treated gastreated gas

High tolerance for dust ingressHigh tolerance for dust ingress High tolerance for strong acid ingressHigh tolerance for strong acid ingress


May 5, 2009 8

SOSO2 2 Product ManagementProduct Management

SOSO22 by-product is high purity by-product is high purity

– 99.9% SO99.9% SO2 2 dry basis, balance composed of traces of COdry basis, balance composed of traces of CO22, N, N22, O, O22

– Food grade quality SOFood grade quality SO22 product demonstrated product demonstrated

SOSO22 product handling: product handling:

– Return to new/existing sulphuric acid plant;Return to new/existing sulphuric acid plant;

– Return to existing sulphur recovery unit;Return to existing sulphur recovery unit;

– Compress and liquefy;Compress and liquefy;

– Convert to bisulfiteConvert to bisulfite


May 5, 2009 9

How CTI Customers Handle By-ProductHow CTI Customers Handle By-Product

Liqu. SO2, 1

SO2 Safe, 1

H2SO4, 11Sulfur, 8

Byproduct processed

in New Facilities, 7

Byproduct processed in existing facilities,

14

By-Product Profile


May 5, 2009 10

Commercial Units – Metallurgical and Acid Plant Commercial Units – Metallurgical and Acid Plant ApplicationsApplications

Application Location Flow (Nm3/hr)

By-Product Feed SO2 Conc.

SO2 Emission

s

Status

SARP Acid SARP Acid PlantPlant

N/S N/S AmericaAmerica

40,00040,000 H2SO4H2SO4

(existing)(existing)5,000 ppm5,000 ppm 15 ppm15 ppm Operating Operating

(s/u 2002)(s/u 2002)

Lead SmelterLead Smelter Asia-Asia-PacificPacific

34,00034,000 H2SO4H2SO4

(existing)(existing)0.1 – 0.1 –

12.5%12.5%90 ppm90 ppm Operating Operating

(s/u 2005)(s/u 2005)

Copper Anode Copper Anode FurnaceFurnace

Asia-Asia-PacificPacific

43,00043,000 H2SO4H2SO4

(existing)(existing)0.09 – 2%0.09 – 2% 50 ppm50 ppm Operating Operating

(s/u 2007)(s/u 2007)

Catalyst Catalyst recovery recovery roasterroaster


48,00048,000 Liquid Liquid SO2/Bisulfite SO2/Bisulfite

(new)(new)

9100 ppm9100 ppm 100 ppm100 ppm Operating Operating

(s/u 2008)(s/u 2008)

Sinter Machine Sinter Machine (secondary)(secondary)


350,000350,000 H2SO4 H2SO4

(existing)(existing)2400 ppm2400 ppm 140 ppm140 ppm Start-upStart-up

Sinter Machine Sinter Machine (primary)(primary)


2 x 2 x 510,000510,000

H2SO4 H2SO4

(new)(new)800 ppm800 ppm 40 ppm40 ppm Start-UpStart-Up

Lead Smelter Lead Smelter + AP+ AP


83,00083,000 H2SO4H2SO4

(new)(new)0.1 – 8%0.1 – 8% 140 ppm140 ppm Construction Construction

(s/u 2009)(s/u 2009)


May 5, 2009 11

Active Projects – Non ferrous and Acid Plant Active Projects – Non ferrous and Acid Plant ApplicationsApplications

Application

Location

Flow (Nm3/hr)

By-Product

Feed SO2 Conc.

SO2 Emission

s

Status

Copper Copper Smelter Smelter FurnaceFurnace


95,00095,000 sulphur sulphur

(new)(new)15-30%15-30% 250 ppm250 ppm EngineeringEngineering

Nickel Nickel Smelter Smelter Converter + Converter + FurnaceFurnace


100,000100,000 H2SO4 H2SO4 (existing)(existing)

0.1 – 3%0.1 – 3% 200 ppm200 ppm Engineering Engineering (piloting (piloting campaign campaign 2007)2007)

Lead Sinter Lead Sinter MachineMachine


265,000265,000 H2SO4 H2SO4

(new)(new)1 – 2%1 – 2% 200 ppm200 ppm Engineering Engineering

(piloting (piloting campaign campaign 2008)2008)

Copper Copper Smelter Smelter ConvertersConverters



4,000 4,000 ppmppm

200 ppm200 ppm EngineeringEngineering

Fertilizer Fertilizer Acid PlantAcid Plant



5,000 5,000 ppmppm

20 ppm20 ppm EngineeringEngineering


May 5, 2009 12

SARP Acid Plant Tail SARP Acid Plant Tail GasGas

Single absorptionSingle absorption Replace alkali scrubbing Replace alkali scrubbing

processprocess Modular PlantModular Plant

– Absorber retrofit (FRP)Absorber retrofit (FRP)


May 5, 2009 13

Lead Smelter OffgasLead Smelter Offgas

Batch anode furnaceBatch anode furnace Load levelling designLoad levelling design

– 0.1 – 12% SO0.1 – 12% SO22

– Constant SOConstant SO22 production production

SOSO22 recycle to existing recycle to existing acid plantacid plant– Main acid plant feed is Main acid plant feed is

roasterroaster


May 5, 2009 14

Co-gen boiler flue gasCo-gen boiler flue gas

965,000 Nm965,000 Nm33/hr /hr – 5 absorbers, 1 5 absorbers, 1

regeneratorregenerator New sulphuric acid plantNew sulphuric acid plant

– Single absorption with Single absorption with Cansolv APTGCansolv APTG


May 5, 2009 15

Key Advantages in Smelter Key Advantages in Smelter ApplicationsApplications

1.1. Suitability to treat variable and dilute Suitability to treat variable and dilute

(<5%) SO(<5%) SO22 loads loads

2.2. Flexibility in gas cleaning designFlexibility in gas cleaning design

3.3. Manage SOManage SO22 from multiple sources at a from multiple sources at a

single sitesingle site


May 5, 2009 16

1.1. Treats Variable & Dilute SOTreats Variable & Dilute SO22 LoadLoad

Load levelling designLoad levelling design

– Vary lean amine flow to SOVary lean amine flow to SO22 absorber absorber

– Constant rich amine flow to regeneratorConstant rich amine flow to regenerator

– Larger amine inventoryLarger amine inventory

Maintain SOMaintain SO22 emissions emissions

Decouple variable nature of smelter gas from Decouple variable nature of smelter gas from sulphuric acid productionsulphuric acid production

– SOSO22 product & Sulphuric acid production are continuous product & Sulphuric acid production are continuous

at constant flowrateat constant flowrate

– Eliminates need to burn sulphur to strengthen AP feedEliminates need to burn sulphur to strengthen AP feed

– Design capacity based on average smelter SODesign capacity based on average smelter SO22 load load


May 5, 2009 17

Load Levelling

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

0 50 100 150 200 250

Time (hours)

SO

2 F

low

rate

(kg

/hr)

Offgas SO2 Load (Cansolv inlet) SO2 Product (Cansolv outlet)


May 5, 2009 18

2.2. Flexibility in gas cleaning Flexibility in gas cleaning designdesign

Amine has high tolerance for Amine has high tolerance for

dust and SOdust and SO33 ingress ingress

Optimise between gas cleaning Optimise between gas cleaning

and amine purificationand amine purification

– Reduced gas cleaning Reduced gas cleaning

increases amine purification increases amine purification

requiredrequired

– Capital/operating cost Capital/operating cost

advantages often favour amine advantages often favour amine

purificationpurification


May 5, 2009 19

2.2. Flexibility in gas cleaning Flexibility in gas cleaning designdesign

Wet acid mist removal Plant Dry gas

[SO3] SO3 / mist wet pre-treatment

SO3 Removal Efficiency

Inlet [SO3] to Cansolv

APU Salt Removal

Coal-fired co-gen boilers

43 ppmv None 0% 40 ppmv

Ion Exchange

Oil Refinery FCCU 22 ppmv High DP dynamic scrubber

88% 3 ppmv

Electrodialysis

Incinerated SRU Tail Gas

1500 ppmv Brownian candle mist eliminators

99% 20 ppmv

Electrodialysis

SARP Tail Gas 200 ppmv None 0% 200 ppmv

Ion Exchange

Lead Smelter + AP 110 ppmv None 0% 110 ppmv

Ion Exchange

Copper Anode furnace

170 ppmv None 0% 170 ppmv

Ion Exchange


May 5, 2009 20

3.3. Manage SOManage SO22 from multiple sources from multiple sources at a single siteat a single site

Multiple absorbers may be used with a single Multiple absorbers may be used with a single

regeneratorregenerator

Several secondary sources: furnaces, convertersSeveral secondary sources: furnaces, converters

Acid plant tail gas has low SOAcid plant tail gas has low SO22 load vs. smelter load vs. smelter

Leverage existing Cansolv plant to minimise Leverage existing Cansolv plant to minimise

capexcapex


May 5, 2009 21


Lean Amine Tank

Condensate

Caustic


APU

MakeupWater


Quenched Offgas




SO2 Stripper Tower

APU Effluent


< 50 ppmv SO2



Dilution air

Main SO2

Absorber Tower

AP SO2

Absorber Tower



Content


Lean Amine Tank

Condensate

Caustic


APU

MakeupWater


Quenched Offgas




SO2 Stripper Tower

APU Effluent


< 50 ppmv SO2



Dilution air

Main SO2

Absorber Tower

AP SO2

Absorber Tower



Content


May 5, 2009 22

Thank you!Thank you!

state of the art gas absorption technologies may 5, 20091 cansolv technologies inc. cansolv so 2...

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