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2019 NORAM Engineering and Constructors Ltd. 1
NORAM Cellchem™ Sulphur Burners Presented to:
Atlantic PAPTAC September 19 2019
Edmunston, NB, Canada
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2019 NORAM Engineering and Constructors Ltd.
• NORAM Overview • Technology: Cellchem™ Sulphur Burners • Case Study: 3 to 12 MTPD Sulphur Combustion Plant • NORAM Equipment - Photos
2
Contents
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2019 NORAM Engineering and Constructors Ltd. 3
NORAM Overview
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2019 NORAM Engineering and Constructors Ltd.
• Privately owned company • Based in Vancouver,
Canada • Founded in 1988 • Approximately 200
employees • Focused on providing
novel technology, equipment and engineering packages o Portfolio of proprietary & patented
technology o Focus on field execution,
commissioning and client responsiveness
o Proven ability to move technology from lab through to industrial installation
o Executing projects world-wide
4
NORAM Overview
Fabrication Facility in Vancouver Research and Pilot Testing Facility
SX Design and Supply Expertise Head Office
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2019 NORAM Engineering and Constructors Ltd.
• Technology commercialization, engineering and project execution under one roof:
• Business Groups:
http://www.noram-eng.com/ http://www.bcri.ca/ http://www.axton.ca/ http://www.noram-intl.com/
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NORAM Overview
Sulphuric Acid
Nitration
Biosystems
Pulp & Paper
Environmental
Electrochemical
Lab & Pilot Testing Scale-up Fabrication Engineering and Execution Process Design
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2019 NORAM Engineering and Constructors Ltd. 6
CellchemTM Sulphur Burner
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2019 NORAM Engineering and Constructors Ltd. 7
NORAM Sulphur Burners History of the Sulphur Dioxide technology
1960 First SF Sulphur Burner sold by Celleco in Sweden. Celleco eventually becomes part of Alfa Laval Group
1960 – 1980 ~130 plants sold under Celleco name
1981 Cellchem AB aquires technology and begins marketing Cellchem Sulphur Burner
1981-2012 Cellchem continues to market SF sulphur burner and develops CF sulphur burner, ~40 units sold under Cellchem name. Eventually becomes part of Akzo Nobel and is marketed by Eka Chemicals/Engineering, a division of Akzo Nobel
2013 Cellchem Sulphur Burner technology purchased by NORAM International AB from Akzo Nobel
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2019 NORAM Engineering and Constructors Ltd. 8
NORAM Sulphur Burners
“Cellchem” line (<100 TPD sulfur) NORAM furnaces (up to 1,200 TPD sulfur)
Cyclone Flame (< 8 TPD)
Spiral Flame (4 - 100 TPD)
Chemtrade acid plant (100 TPD)
Sherritt acid plant (350 TPD)
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2019 NORAM Engineering and Constructors Ltd.
Pulp and Paper ClO2 for bleaching, bisulfite/sulfite for wood digestion, SO2-water for neutralization Sulphuric Acid SO2 for the production of H2SO4 Food Colour removal in sugar production Chlor-Alkali Bromine removal from sea water Mining Slurry contacting for metal oxide reduction and cyanide destruction Chemicals SO2 for the production of miscellaneous chemicals and liquid SO2
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Sulphur Burners
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2019 NORAM Engineering and Constructors Ltd. 10
Pathways
Sulphur Melting
Molten Sulphur Storage
Sulphur Burning
SO2 Gas
Cooling
Liquid SO2
Oxygen (PSA/VPSA or
cryogenic)
Sulphur Burning
SO2 Gas
Cooling
Up to 100% SO2
Air
18% SO2
Na/Mg/Ca
Bisulfite
SO2-Water
Sulfite
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2019 NORAM Engineering and Constructors Ltd.
1. Sx(l) x/y Sy(g) Evaporation: Rate-limiting step in sulphur burning
2. S(g) + O2(g) SO2(g) Oxidation: Fast, max 21 vol% in air 3. SO2(g) + ½O2(g) SO3(g) Oxidation: Fast, undesirable
equilibrium reaction favoured by low temperature
4. SO3(g) + H2O(g) H2SO4(g) Hydration: Equilibrium reaction
significant at temperatures below 400°C
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Sulphur Burning
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2019 NORAM Engineering and Constructors Ltd.
• NORAM provides: o Sulphur and Spent Acid Burners o CellChem Sulphur Burners (Business line and technology acquired from Akzo Nobel)
• Types of Atomization: o Pressure atomization
up to ~17% v/v SO2 in air 7-12 bar(g) sulphur pressure ~1 mm droplet diameter
o Air atomization up to ~19.5% v/v SO2 in air ~1 bar(g) sulphur pressure 1-4 bar(g) atomization air pressure ~0.1 mm droplet diameter
o Oxygen enrichment up to 100 % v/v SO2
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NORAM Sulphur Burners
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2019 NORAM Engineering and Constructors Ltd.
• Sulphur Burners (Pressure Atomization): o Large scale furnaces typically used in sulphuric acid plants o Custom designed, cylindrical, horizontal vessels providing high efficiency combustion o Furnace residence time typically between 1-3 seconds o Internal baffles used for gas mixing (CFD) o Robust shell and refractory brick designs are used to ensure longevity of the burner o Bricked partitions with arched openings are used as baffle walls
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NORAM Sulphur Burners
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2019 NORAM Engineering and Constructors Ltd.
• Cellchem™ Sulphur Burners (Air/O2 Atomization) : o Specifically designed to provide relatively small quantities of SO2 to a number of industries
(0.5 to 100 t/d sulphur) o Two types available – spiral flame (SF) and cyclone flame (CF) o Energy recovery in the form of steam is possible o Advantages of Cellchem Burners include:
Fast start-up times Range of SO2 concentrations produced High turndown ratio Extensive reference list (>180 installations)
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NORAM Sulphur Burners
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2019 NORAM Engineering and Constructors Ltd.
• Cellchem Sulphur Burners (Air/O2 Atomization): o Furnace residence time = 0.3-1 seconds o Internal mixing grid may be used >18% SO2 o “Hot Shell” design to minimize corrosion on steel shell due to acid condensation
and to permit the use of carbon steel o Smaller furnaces, chemicals industry
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NORAM Equipment – Burners
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2019 NORAM Engineering and Constructors Ltd.
• High Concentration SO2 Production: o CELLCHEM™ OXY-SO2™
High strength SO2 gas with 3-5% excess O2. o CELLCHEM OXY-SO2 PLUS™
High strength SO2 gas with <0.3% excess O2. o SO2 gas delivered at pressures up to 6 barg o Heat recovery 0 - 60 bar steam o Recovery efficiency > 90% o 3.7 kg steam per kg of sulphur burned
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NORAM Equipment – Burners
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2019 NORAM Engineering and Constructors Ltd. 17
Sulphur Burner Temperatures
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
0%
5%
10%
15%
20%
25%
30%
35%
7 9 11 13 15 17 19
Furnace Temperature (°C
) C
onve
rsio
n of
SO
2 to
SO3
SO2 strength, %
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2019 NORAM Engineering and Constructors Ltd.
o Hot SO2 gas (1300°C) from furnace cooled to 40-60°C in direct contact spray cooler
o Bulk of cooling is achieved by evaporation of circulating water, balance of
cooling in external plate and frame cooler o Refractory-lined/specialty alloy inlet duct to minimize corrosion o Spray system designed to ensure complete wetting of shell to avoid “hot
spots”
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SO2 Gas Cooling
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2019 NORAM Engineering and Constructors Ltd.
• Several downstream options for SO2 gas:
o Bilsulfite/sulfite: SO2 absorbed into sodium/calcium/magnesium hydroxide to produce sulfite/bisulfite for use in wood digestion
o Ammonium sulfite: SO2 absorbed into ammonia solution to produce ammonium sulfite as a coloring agent in food industry
o SO2-water: SO2 absorbed into chilled water to produce ~6 wt% solution of SO2 in water
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SO2 Absorption
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2019 NORAM Engineering and Constructors Ltd.
• Skid-mounting available for some equipment to
minimize shipping and installation cost.
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Skid –Mounted Construction
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Case Study
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Case Study: Basic SO2 Process
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2019 NORAM Engineering and Constructors Ltd. 23
3 to 12 MTPD Sulphur Combustion Plant • Project Requirements:
o Design and supply a small sulphur dioxide combustion and quench system for a large, Canadian Pulp and Paper producer
o SO2 to be used for their high quality corrugating medium facility
o SO2 produced is quenched and absorbed in an existing absorption tower for use in downstream digester
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2019 NORAM Engineering and Constructors Ltd.
• Constraints: o Physical space constraints o High SO2 Concentration o Large turn-down capacity (between 25% and 100% of 12 MTPD
design capacity) o Maximum ten (10) hours start-up time from cold o Very tight project schedule, dictated by overall plant shutdown
scheduled in October 2018
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3 to 12 MTPD Sulphur Combustion Plant
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2019 NORAM Engineering and Constructors Ltd.
• Project Execution: o NORAM’s Cellchem™-style, Spiral-flame (SF) sulphur burner
was selected as the most suitable style of burner to meet the above constraints
o Operating Parameters: Feedstock: Liquid molten sulphur, delivered from an
existing storage facility and positive displacement pump Product Gas: Between 820 kg/h and 3,500 kg/h of 18-
19vol% SO2 gas at 60°C and under slight vacuum
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3 to 12 MTPD Sulphur Combustion Plant
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2019 NORAM Engineering and Constructors Ltd.
• Project Execution: o NORAM completed the main process design from the inlet of
liquid sulphur to the furnace to the outlet of the quench gas from the quench tower
o All detailed design of the sulphur burner and quench tower was completed at NORAM’s fabricator, AXTON, in Vancouver
o Balance of equipment sourced from various suppliers o Installation and construction of plant were completed by the
Client and the Clients Constructors with NORAM’s sub-contractor installing the refractory brick under NORAM supervision
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3 to 12 MTPD Sulphur Combustion Plant
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3 to 12 MTPD Sulphur Combustion Plant
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3 to 12 MTPD Sulphur Combustion Plant
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2019 NORAM Engineering and Constructors Ltd.
• Commissioning and Start-up: o Pre-commissioning, water batching and refractory curing using
the permanently installed natural gas burner were completed in two weeks prior to scheduled plant start-up date
o A complete plant shutdown was scheduled after refractory curing to complete the final plant tie-ins
o Plant was successfully started-up over a two day period at the end of October 2018, meeting production and schedule requirements
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3 to 12 MTPD Sulphur Combustion Plant
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NORAM Equipment - Photos
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NORAM Equipment – Photos