Presentation - COBRAS 2015

1. Sulfur handling & melting
Sebastian Brechtel
Product & Strategy Manager

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Sulfur handling and melting – process steps
10/26/20152
• Sulfur storage
• Solid sulfur dosing
• Sulfur melting
• Sulfur filtration
• Leaf filter
• Polishing / Police filter
• Liquid sulfur storage

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Sulfur Handling & Melting
10/26/20153
Sulfur Melting in ext. Heat Exchanger & Filtration & Storage

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Sulfur Storage
10/26/20154
Bulk Storage
Liquid Sulfur Storage
45,000 t

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Sulfur storage under roof recommended
10/26/20155
• Higher CAPEX
• Safety concept needed
• Less impact on
environment
• Minimized pollution = loss
of sulfur
• Acidity control

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Solid Sulfur-Day Bin
Features
• Bin for two sulfur melters
• Two independent discharge systems for
each melter
• High flexibility
- Adjustable sulfur feed of each
melter
• Reduced Invest cost, only one
installation
• Additional buffer capacity
• More flexibility by feeding from
storage to day bin
10/26/20156

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Solid Sulfur-Day Bin
Alternative – Payloader
• Smaller capacity plants
• Man power required
10/26/20157

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Sulfur melting and filtration
Features
• Sulfur melting tank above ground
• No pits – why?
• Dead zones in rectangular
shaped pits
• Solids settling
• No heat and mass transfer in
dead zones
• Leakages not visible
= LARGE & INEFFICIENT
10/26/20158

9. © Outotec – All rights reserved
Sulfur melting and filtration
Features
• Sulfur melting tank above ground
• Tanks advantages
• Circular without dead zones
• Easy to agitate well
• High efficiency mass and heat
transfer
• Easier cleaning
Efficient:
40 t/h sulfur melting in tank of
7 m diameter
4 m height
10/26/20159

10. © Outotec – All rights reserved
Sulfur melting and filtration
Features
• Sulfur melting tank above ground
• No pits
• Front-end loader sulfur feed or
Sulfur day bin dosing
• Good access for maintenance
• Heating coils removable or
external shell and tube heat
exchanger
• One single agitator in melter
• Leaf filter & polishing filter
10/26/201510

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Sulfur Melting Tank - Dirty Sulfur
Features
• Full drainage of the tank possible for
maintenance
• Easier removal of non-molten , un-
desired solids collected at the lowest
part of the vessel
• Better access to equipment parts
• Removable heating coils
• Carbon steel with brick-lined section
in upper part of the melter
• Natural overflow to dirty sulfur pump
tank
10/26/201511
M

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Sulfur Melting Tank - Dirty Sulfur
10/26/201512
Flat Bottom

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Sulfur Melting Tank
Features
• minimized number of weld seams by
bending design
• heating bundle removable from top of
melter by filled up melter
• individual replacement of each heating
coil
10/26/201513

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Sulfur Leaf Filter
Features
• Hydraulic movement of Filter Shell
• Avoiding filter cake disposals on
movement
system , Hanging shell arrangement
prefered
• Solid filter plate support system
• Personal risk elimination by disposal
opening below filter frame
• All utility and sulfur connections at
fixed head except the shell heating
device
10/26/201514

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Police - / Polishing - Filter
10/26/201515
Features
Filter candle type
sinter material allows
high filtering efficiency,
steam and chemical
cleaning

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Ceramic vs. wounded glas fibre candles
10/26/201516
Pro
• Efficient
• High capacity
Con
• Cost
• Cleaning difficult
Pro
• Cost
Con
• Capacity
• Single use

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Ceramic vs. wounded glas fibre candles
10/26/201517
Design decision triggered by level of impurities

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Thank you for your attention ...