Sulfur Handling - Outotec - COBRAS 2015

Sulfur handling & meltingSebastian Brechtel

Product & Strategy Manager

© Outotec – All rights reserved

Sulfur handling and melting – process steps

05/01/20232

• Sulfur storage

• Solid sulfur dosing

• Sulfur melting

• Sulfur filtration

• Leaf filter

• Polishing / Police filter

• Liquid sulfur storage


Sulfur Handling & Melting

05/01/20233

Sulfur Melting in ext. Heat Exchanger & Filtration & Storage


Sulfur Storage

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Bulk Storage

Liquid Sulfur Storage45,000 t


Sulfur storage under roof recommended

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• Higher CAPEX

• Safety concept needed

• Less impact on environment

• Minimized pollution = loss of sulfur

• Acidity control


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

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Solid Sulfur-Day Bin

Alternative – Payloader

• Smaller capacity plants

• Man power required

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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

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Features


• 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 diameter4 m height

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Features


• 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

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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

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M


Sulfur Melting Tank - Dirty Sulfur

05/01/202312

Flat Bottom


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

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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

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Police - / Polishing - Filter

05/01/202315

FeaturesFilter candle type

sinter material allowshigh filtering efficiency,steam and chemical cleaning


Ceramic vs. wounded glas fibre candles

05/01/202316

Pro• Efficient• High capacity

Con• Cost• Cleaning difficult

Pro• Cost

Con• Capacity• Single use


Ceramic vs. wounded glas fibre candles

05/01/202317

Design decision triggered by level of impurities


Thank you for your attention ...

Sulfur Handling - Outotec - COBRAS 2015

Engineering

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