“mecs sulfox” high energy efficient sulfuric acid … final.pdfconfidential “mecs sulfox”...
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Confidential
“MECS SULFOX”High Energy Efficient Sulfuric Acid Process Technology for cleaning up
Lean & Wet Sulfurous Off-gasses
Sulphuric Acid Conference4–6 MAY 2009
SUN CITY, SOUTH AFRICA
Confidential 2
Today’s Topics
MECS IntroductionOverview Processes around the sulfur moleculeSULFOX description & it applicationsBenefits
Confidential 3
MECS Intro
Sulfuric Acid Plants
Process Technologies
Sulfur Recovery –Tail gas cleanup
Products & Engineered Equipment
Know-HowPeople
The leading EXPERT for dealing with SULFUROUS GASSES
Confidential 4
Alkaline scrubbers
Regenerative Absorption
Wet gas process (Sulfox)
Conventional Sulfuric Process
SO2 in Gas stream (% Vol)
0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10
SO2 removal
Confidential 5
MECS has created a unique offering One consolidated approach:
Conventional acid plantWet ProcessSO2 regenerative systemDynaWave scrubbers
SO2 removal
Confidential 6
Wet Process Chemistry
(SO2 + 1/2 O2) y → y. SO3 → y. H2SO4
+ x(H2O) + x(H2O) + (x-y) (H2O)
Catalyst
Evaporation isrequired to make concentrated acid …
Confidential 7
What is SULFOX ?
A Technology for: cleaning upwet “sulfur containing” offgaswith production of a valuable product as Sulfuric Acid
Applications (anywhere SO2, H2S, CS2,… is present):Petrochemical (gasification)RefineryNatural Gas productionWaste Management (gasification or burning)Mining & Roasting industryViscose industry
Confidential 8
SULFOX Basic Flow Diagram
WESP + A.C.Condensationcolumn
Clean Stack (incl. excess water)
H2SO4 (l)
-200°C
H2SO4 (g)~250°C
~70°C
V2O5
Catalyst
-150°C
V2O5
SO2 ~370°C
Square Reactor(Converter)
Demin.water
Confidential 9
SULFOX
A Process Technology (know-how), including equipment & layout design, for converting sulfurous gas components into Sulfuric Acid, via a sequence of following main equipment, or parts of:
1. Square reactor (=converter): using Pt and vanadium based catalyst & with internal heat exchangers using molten salt, to convert the sulfurous components to SO3
2. Condenser: with special lining, with horizontal glass HEX tubes for acid condensation, and an acid concentration section (packed section)
3. WESP: to capture the acid mist and partly oxidize the remaining SO2
4. Activated Carbon Bed Filter: to partly oxidize the remaining SO2and wash out the SO3 as weak acid.
Confidential 10
SULFOX Applications - Basic Flow Scheme
1. Liquid feeds and large H2S gas feeds2. Dirty liquid or gas feeds3. All applications (converter, heat exchanger,
condenser, WESP, activated carbon)4. As required to meet low SO2 emissions (>99.5%
conversion)
Step 1Combustion
/ SteamEquipment
Step 2Gas
CleaningSystem
Step 3
SULFOX
Step 4
TailgasScrubber
MECS: Know-How DynaWave CatalystD-205 Cooler DynaWave
Application: AsRequired
AlwaysIncluded
Dirty FeedStreams
CombustionRequired
Confidential 11
Standard typical flow scheme – lean SO2
WEAKACID
COOLERS
EFFLUENT TONEUTRALIZATION
SYSTEM
MAKE-UPWATER
GAS TO BLOWER
PRIMARY REVERSE JET
SCRUBBER PUMPS
GAS COOLING TOWER
FINAL REVERSE JET
SCRUBBER PUMPSGAS
COOLINGTOWER PUMPS
SAFETYSEAL
FINAL REVERSE JET
SCRUBBER
PRIMARY REVERSE JET
SCRUBBERLC
FC
AIRINLEAKAGE
ELECTROSTATIC MIST
PRECIPITATOR
LCLC
COOLING WATER SUPPLY
COOLING WATER SUPPLY
FC
PC
PC
DRYESP
(BY OTHERS )
GAS FROM FURNACE
PC
123
ELECTROSTATIC MIST
PRECIPITATOR
FROM WESP(AFTER GAS CLEANING)
ACTIVATEDCARBON FILTER
21
22
26
27
TAIL GAS
CONDENSATION COLUMN,
WITH GLASS TUBEHEAT
EXCHANGER
GAS PREHEATER
GAS COOLER
MAIN BLOWER
COMBUSTION AIR
COMBUSTIONAIR FAN
FUEL GAS
MOLTEN SALT TANK
124
MOLTEN SALT PUMP
MOLTEN SALT COOLER
120
DILUTE ACID (50%) PUMP
128 DEMIN WATER
PRODUCTACID PUMP
PRODUCTACID COOLER
COOLING WATER SUPPLY
COOLING WATER SUPPLY
PRODUCT ACID
TC
WEAK ACID (10%)PUMP
TC
127 COMBUSTION CHAMBER AND
STARTUP BURNER29
24REACTOR
(CONVERTER)
25
TC
11
23
28
WEAK ACIDTANK
LC
125 126
129 130
121
122
AMBIENT AIR 1
AIR FAN WITH VFD
2
3TO ATMOSPHERE
PRODUCT ACIDTANK
LC
Confidential 16
Benefits of SULFOX wet gas process
SULFOX benefits:1. No liquid effluent, but a saleable product (Sulfuric Acid)2. Very Low Acid Mist Emission
— WESP
3. High SO2 conversion, so low SO2 emissions— Activated Carbon Bed
4. Reliability: Robust Mechanical Condenser Design— Horizontal short tubes (w/ interim supports)
Confidential 18
Benefits of SULFOX wet gas process
SULFOX benefits:1. No liquid effluent, but a saleable product (Sulfuric Acid)2. Very Low Acid Mist Emission
— WESP
3. High SO2 conversion, so low SO2 emissions— Activated Carbon Bed
4. Reliability: Robust Mechanical Condenser Design— Horizontal short tubes (w/ interim supports)
5. Reliable DynaWaveTM Gas cleaning6. Proven Catalyst: Use of different types of catalyst (Pt)7. MECS know-how, reputation & service in acid plants8. Very compact: low CAPEX & OPEX (low pressure drop)
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