Beet Introduction Application
From Alcohol
The knowledge and experience of Maguin-Interis was developed in France in the field of distilleries and Beet sugar plants, which supply alcohol to world leading spirits and cosmetics groups.
Three axes of development allowed Maguin-Interis t...
Three axes of development allowed Maguin-Interis to achieve unequalled performances:
- The excellence in terms of chemical and organoleptic quality (tasting) of Extra Neutral Alcohols “ENA”
- The high alcohol yield
- Very low energy consumption
Because Beet is processed over a period of 3-6 months a year, units are designed to allow the treatment of several raw materials:
- The raw juice, extracted from Diffuser, during beet campaign
- B molasses, high and low grade run-off (from centrifugal station), which can be stored and treated out of campaign,
- Beet molasses (or C Molasses),
- Beet syrups
Fermentation
Thanks to its expertise in fermentative biology, Maguin-Interis can guarantee the best yields and residual sugar rates.
Continuous yeast propagation, associated with a bacterial follow-up, allows the reduction of yeast consumption using standard or selected strains.
Alcohol fermentation can be run in continuous mode, or in discontinuous mode when cooling water temperature is critical. Continuous Fermentation is generally proposed to facilitate operating tasks. In 2003, Maguin-Interis achieved the first continuous fermentation of sugar cane syrups in Thailand. Since then, several other units are working with this process, producing the best fermentative performances.
Depending on the raw materials, recycling of yeast is realized in order to reduce Fermentation duration.
Distillation
The Distillation step concerns the stripping of fermented mash, with production of vinasses (or spent wash) and the alcohol concentrated into phlegm or high degree raw alcohol.
The design concept of Maguin-Interis allows for adaptation to each type of raw material thus obtaining continuous operation without periodic cleaning.
Columns are equipped with several types of internals adapted to functions of degassing, stripping, oil separation and concentration. Resulting from constant development of its Processes, Maguin-Interis recently introduced the use of 4th generation Internals. Distillation yields attained by Maguin-Interis processes are superior to 99.5 %.
The use of schemes with multiple effects, vapour thermo-compression and coupling with the other units results in a reduction in the global steam consumption of the alcohol production units.
The use of simulation software is an integrated part of the study for processes optimisation.
Rectification
Rectification covers all steps of raw alcohol treatment (phlegm) for the production of Rectified Alcohol (Industrial quality) or Rectified Extra Neutral Alcohol (REN - Superfine - ENA).
The expertise of Maguin-Interis is inherited from knowledge passed on generation to generation by 'distillers' pioneered by the famous Emile BARBET. Therefore, the quality of alcohols obtained by Rectification units has resulted in Maguin-Interis being a reference for the major alcohol producers.
In order to continuously improve its Rectification process, Maguin-Interis set up specific simulation tools allowing the selection of extraction products to be optimized, by considering for each of them the chemical and organoleptic aspects.
This development led to a complete mastery of the installations and to impurities management in the various stages of the Process: Hydroselection (or indirect purification), Rectification, Refining and Low Grade Concentration with specific purification stage. So the extraction rates are minimized, while ensuring a high quality of the neutral alcohol produced.
The proposed schemes are with multiple effects using columns under vacuum and/or with vapour recompression, leading to the best energy performances.
Dehydration
In 1993 Maguin-Interis conceived and patented the first French alcohol Dehydration unit using molecular sieves or zeolites.
By the in-depth study of mass transfer in solid media and a unique conception of process automation, Maguin-Interis ensures a process having very high reliability. Therefore, units can work consistently without renewal or addition of zeolites.
Intended for Bioethanol production, the dehydration process with molecular sieves also applies to dehydrated rectified alcohol production, producing an ENA alcohol quality with very low moisture content.
Maguin-Interis also owns a Dehydration Process using azeotropic distillation.
In constant search for innovative Processes, Maguin-Interis has developed in partnership a scheme for Dehydration by the Membrane Process.
Vinasses (spent wash) concentration
Maguin-Interis processes for vinasse (spent wash) concentration are suited to the various raw materials. Their conception allows the reduction of energy costs and control of fouling.
The use of co-current, counter-current or cross-current multiple effects enables the optimization of the concentration-temperature parameters and consequently minimizes fouling.
For low concentrations, the use of falling film evaporators independently combined with MVR (Mechanical Vapour Recompression), or coupled with multiple effects, allows operation with a low temperature difference and reduces investment.
For high concentrations and\or viscous products, multipass evaporators with forced circulation are used.
The proposed schemes are with multiple effects, combined with MVR or thermo-compression of vapours. These can be coupled with other upstream or downstream process units in order to optimize the overall energy consumption of the plant.
For materials with high potassium content (e.g. Beets), de-potassification of vinasse (spent wash) is realized by a Maguin-Interis concentration / crystallization process.
Energy Integration
Maguin-Interis units are conceived for the overall integration of energy resources and optimization of their use.
Several levels of energy production can be defined:
- Level 1: production of electricity and High Pressure steam (HP)
- Level 2: production of electricity and Low Pressure steam (LP), and process vapours
- Level 3: process units for Ethanol production, with co-products valuation and possible generation of biogas or process vapour recovered in the units.
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