Clean and Efficient Aluminium Production

Transcription

1 GE Power Clean and Efficient Aluminium Production 2017 STEAM POWER SYSTEMS PRODUCT CATALOG

2 PORTFOLIO AND OVERVIEW ALUMINIUM, ALUMINA & CARBON Cleaner and more efficient aluminum production. Reduced Environmental Footprint Significantly reduced emissions with ABART counter current alumina injection. 2 Improved Operational Integrity, Efficiency and Sustainability Gas Conditioning by HEX potentially results in 30% less conventional GTC size and Power requirements as cooling by dilution air is 1.78 times larger than for HEX

3 INTRODUCTION Primary Aluminium Industry Solutions With more than 230 installations globally, our aluminum technology has evolved over the past 60 years to cope with increasing pot amperage, more stringent environmental regulations and maximum return of valuable materials to the process. Along with increased production volumes encountered in the aluminum industry comes a rising demand for greater efficiency that GE is meeting with completely new and integrated approaches to gas cleaning, heat recovery, and alumina feed systems. Gas Treatment Centers (GTCs) Our Gas Treatment Centers (GTCs), built around our Abart*technology, add various solutions, such as heat exchangers and SO2 abatement, with benefits such as better gas temperature control, lower emissions and smaller footprint. Novel Fume Treatment Center (FTC) The Novel Fume Treatment Center (FTC) is also built around our Abart* but applied to PAH-laden fumes from anode baking. It also incorporates the unique GE patented integrated gas conditioning, fume scrubbing, energy recovery heat exchanger (AHEX). Alfeed * supply-on-demand The Alfeed*supply-on-demand horizontal transport and distribution system reliably delivers enriched alumina to the pots and is ideal for modernizing and modularization of the GTCs. This self-regulating, fully automatic air slide system requires little maintenance. Its compact form reduces space conflicts, and it can be retrofitted during normal potline operation. Secondary Aluminium, Alumina & Carbon Industry Solutions Additionally for Secondary Aluminium, Alumina and dedicated Carbon plants GE possesses a host of dedusting, acid neutralization, multipollutant treatment and tar/voc/odour abatement systems from small pre-assembled units to fully integrated tailored solutions. GE Air Quality Control Systems are suitable for both new plants and for upgrade of existing plants. Reduced Physical Footprint The ABART-C based GTC solution results in up to 60% less footprint compared to conventional GTC with DeSOx scrubbing Lower Operating Cost Gas Conditioning by HEX results in power consumption savings up to 2 MW less per GTC with HEX 3

4 DETAILS ALUMINIUM, ALUMINA & CARBON Application / GE Solutions ABART GTC ABART FTC ALFEED/Alumina Handling & Storage HEX/AHEX ESP/FF WFGD/DFGD/SWFGD TO/RTO/KEMPAK/PAC GE Digital Alumina Calciner Aluminium Potline Carbon/Anode Plant Casthouse/Melt Shop Finishing/Coating Lines Decoating Lines Scrap / Dross Recycling Multi-Site Integration Performance Analytics Captive Power / Boilers SUCCESS STORY The world s largest single site aluminium smelter, EGA Al Taweelah (also known as EMAL), is based in the UAE. The smelter complex was constructed in two successive phases, reaching a production capacity of more than 1.3 million tonnes of molten aluminium per year. Our Potline Gas Treatment Centers (GTCs) and Carbon Anode Baking Oven Fume Treatment Centers (FTCs) were provided for both phases, as was the world s largest GTC, the first in the area to also incorporate SWFGD. 4

5 TECHNICAL PRODUCT SPECIFICATIONS GTC with SWFGD FTC with AHEX Gas Treatment Center GTC Emission Guarantees After Dry Scrubber Hydrogen Fluoride HF 0.5 mg/nm3 Particulate Fluoride 0.3 mg/nm3 Total Fluorides 0.8 mg/nm3 Total Particulates 5, with standard polyester bags 2, with MicroDenier Super bags Emission Guarantees After Wet Scrubber SO 2 Emission >95% removal, SWFGD with packing >85% removal, WFGD Open Spray Tower Total Fluoride 0.2 mg/nm3 Total Particulates <0.2 mg/nm3 5

6 ALUMINIUM, ALUMINA & CARBON Fume Treatment Center FTC Emission Guarantees After Dry Scrubber Hydrogen Fluoride HF (mg/nm 3 ) 0.5 mg/nm3 Particulate Fluoride 0.3 mg/nm3 Total Fluorides 0.8 mg/nm3 Total Particulates 5 mg/nm3 Condensed Soluble Tars 1.7 mg/nm3 Polycyclic Aromatic Hydrocarbons PAH mg/nm3 Emission Guarantees After Wet Scrubber Hydrogen Fluoride HF (mg/nm 3 ) 0.2 mg/nm3 achieved Particulate Fluoride 0.1 mg/nm3achieved Total Fluorides 0.3 mg/nm3achieved Total Particulates 0.1 mg/nm3achieved Condensed Soluble Tars 0.4 mg/nm3achieved Polycyclic Aromatic Hydrocarbons PAH mg/nm3achieved 6

7 TECHNICAL PRODUCT SPECIFICATIONS Other Applications (Secondary, Alumina, Carbon) Dedusting or Product Recovery Dry ESP : PM only Up to 99.95% removal efficiency Wet ESP : PM + Acid Gas removal Up to 99.5% removal efficiency FF : Total Particulates Typically as low as 5 mg/nm3 Acid Gas Neutralisation Removal efficiency Typ % Wet Reagent Scrubbing Systems (WFGD) Up to 99% removal efficiency Sea Water Reagent Scrubbing System (SWFGD) Up to 98% removal efficiency NOx Control Selective Catalytic Reduction (SCR) Up to 95% removal efficiency VOC/Odour Neutralisation Thermal Oxidiser (TO) Typ.99.5% destruction efficiency Regenerative Thermal Oxidiser (RTO) Typ % dest. efficiency Wet Chemical Scrubbing (KEMPAK) Case-by-Case Others Energy Recovery Case-by-Case Alumina Storage, handling & feed Case-by-Case 7

8 *Trademark of General Electric Company. 2017, General Electric Company and/or its affiliates. GE proprietary information. All rights reseverd. No part of this document may be reproduced, transmitted, stored in a retrieval system nor translated into any himan or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, manuall or otherwise, without the prior written permission of the General Electric Company or its concerned affiliate. Information contained in there is indiciyive only. No representation or warranty is given or shouldbe relied on that is it complete or correct or will apply to any particular projkect. This will depen on the technical and commerical circumstances. It is provided without liability and is subject to change without notice.