Factory concepts for very low steam demand and status of implementation

Morgenroth, B.; Pfau, Stefan

doi:10.36961/si10802

Sugar Industry

2010

DOI: 10.36961/si10802

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Factory concepts for very low steam demand and status of implementation

B. Morgenroth¹,

Stefan Pfau²

Abstract: The export of power from cane sugar factories makes possible the production of “green energy” and proves nowadays to be a substantial source of revenue as well. Looking to the co-generation potential of the cane sugar industry, the power export is in fact still at a very early stage. This report gives an overview of concepts and measures that are required to achieve a low steam demand and high electrical power export for different factory concepts. The impact of sugar extraction by mills and diffusers as well … Show more

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Techno-Economic Potential of a Polygeneration System Integrated with Conventional or Hybrid Solar Dual Fluidized Bed Gasification Technology in an Australian Sugar Mill

Ngo,

Nathan,

Ashman

et al. 2024

Energy Fuels

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A techno-economic assessment of a biorefinery plant has been conducted, considering the colocation of solar and biogenic resources. The investigation explored the opportunities for integrating a 50 MW th hybrid concentrated solar thermal dual fluidized bed (SDFB) gasifier into a sugar mill located in Harwood, Australia. Various end-product routes were considered, including utility generation with the additional synthesis of liquid fuels or power. Impacts of process configurations, concentrated solar thermal (CST) plant designs, and direct normal irradiance on energy efficiency, solar share, and economic feasibility were studied. Technical assessments indicate that integrating the SDFB gasifier into the mill enhances overall energetic efficiency (60−73%) and reduces net CO 2 emissions, surpassing the cogeneration benchmark. Economic assessments reveal the necessity for further cost optimization for competitive positioning in the current market, as breakeven analyses indicate that economic viability in suitable mill locations necessitates a liquid fuel price range of 2.3−5.

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Techno-Economic Potential of a Polygeneration System Integrated with Conventional or Hybrid Solar Dual Fluidized Bed Gasification Technology in an Australian Sugar Mill

Ngo,

Nathan,

Ashman

et al. 2024

Energy Fuels

View full text Add to dashboard Cite

show abstract

Energy efficiency improvement of cane sugar factories by drying of bagasse with superheated steam

Morgenroth¹,

Batstone²

2013

Sugar Industry

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Bagasse drying with superheated steam offers the advantage of producing approximately 15% more power than with a conventional co-generation plant. Based on a fibre content of 14% on cane a power export of up to 140 kWh/t cane is achievable compared to 122 kWh/t cane in case of a conventional highly efficient co-generation plant. The operational results of a 12 t/h bagasse drier in Australia are briefly described and a concept of integrating a bagasse steam drier system in a modern highly energy efficient cane sugar plant is explained. This encompasses changes in the boiler capacity, turbogenerators and evaparation plant lay-out. Based on power export prices in the range of USD50–85/MWh the payback period of a bagasse steam drier system can be estimated with 3–6 years.

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Comparison of beet and cane sugar production methods and opportunities for dual production

Avram-Waganoff¹,

Morgenroth²

2019

Sugar Industry

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There are still large differences in process steam consumption, sugar recovery and plant availability when comparing sugar production from beet versus that from cane on a global scale. These are partly due to higher sugar contents and purities of sugar beet, but also due to more developed process technologies enabling a more efficient usage of steam and energy. Specific areas of a cane factory that can benefit from adaption technologies typically employed in European beet sugar production are: heat-transfer equipment especially evaporators and condensers, sugar-house work including seed magma systems by cooling and improved crystallizer designs, close monitoring and reduction of water input at all stages of the process, modern layout of the plant in order to reduce pressure drops and enable good supervision, and efficient electrical drives and automation systems. As a result, the improved factories have been able to increase significantly sugar yield and cogeneration power for sale to the national grid and have an increased profitability. Some specific examples of the technological improvements and benefits obtained in some cane factories as a result of the above measures are presented. A further example of the possibilities to process sugarcane and sugar beet in a highly efficient dual-use plant is also shown. Due to the low process-steam consumption of the plant, enough surplus bagasse is produced during the cane crop in order to be self-sufficient in fuel during the beet crop.

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Factory concepts for very low steam demand and status of implementation

Cited by 3 publications

References 0 publications

Techno-Economic Potential of a Polygeneration System Integrated with Conventional or Hybrid Solar Dual Fluidized Bed Gasification Technology in an Australian Sugar Mill

Techno-Economic Potential of a Polygeneration System Integrated with Conventional or Hybrid Solar Dual Fluidized Bed Gasification Technology in an Australian Sugar Mill

Energy efficiency improvement of cane sugar factories by drying of bagasse with superheated steam

Comparison of beet and cane sugar production methods and opportunities for dual production

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