Objective
REDUCTION ELECTRICAL POWER CONSUMPTION :
The BiViS twin screw press machine will use less power than the "HOLLANDER BEATER" system. Reduction in consumption is estimated at 44%. Total fresh water required for washing, per MT of pulp, will be reduced from 88 MT to 6 MT.
POLLUTION ABATEMENT :
The organics from the dissolved raw material in the cooking operation remain in the black liquor as dissolved solids. This residue is used to generate live steam. The saving involved is 30% of the total live steam required for the factory pulp. The caustic soda used as reactant in cooking is dissolved in the black liquor together with the organics. About 90% of it is recovered and reused.
A sharp reduction in fresh water consumption means a higher content of dissolved solids in the black liquor effluent, affording an economical recovery of these solids. All the black liquor effluent is treated, and pollution is prevented.
SAVING IN TIME :
The time in processing pulp has to be less than required by the machines used at present, due to the technology of the process continuous applied.
CELESA has obtained, with the Thermie Project IN/00058/ES/FR implementation, a Modern Operative Unit, provided with a high technology, applying the BIVIS Extrusion Process to the textile origin long fibres.
The possible polifunctions to be carried out by the BIVIS Machine are the following :
a) Pulp washing
b) Cutting and pulp defibrilation
c) Uncooked micronisation
d) Pulp delignification
All of them have obtained with a general high efficiency value.
The BIVIS process has demonstrated the following advantages :
a) Electrical Energy saving
b) Bleaching Reactives saving
c) Saving in lower loss of fibres
d) Work flexibility to adapt it to the different materials with very different cutting demands from 0 to 100%
e) Compact process
f) Continuous process and Modulable Loading
1) INNOVATIVE TECHNOLOGY
The CLEXTRAL BIVIS MACHINE represents an innovation, for its multifunctional character, its modular concept and its process in continuous. It simultaneously cuts the long fibers, micronizes the uncookeds, washes the pulp, and filters black liquors giving an effluent of high solids content.
A further innovation is to be found in the EPYTEX SYSTEM. This simplified system avoids pollution, generates steam by recovering dissolved chemical reactants for reuse in pulping.
2) OPERATING CONTEXT
The context in which the technology is operating is in non-wood factories pulp, working with special raw materials, such as flax, hemp, sisal, abaca, kenaf, ... Non-wood pulp and paper factories, however, always have a small yearly output. As well the fibers treatment, from the pulping process poses special problems; problems that cannot alays be solved with the coventional systems.
3) ECONOMIC ASPECTS
Total annual energy consumption of the project process and the previous conventional process (based on pulp production of 15000t/y)
a) Total annual electrical energy
consumption of the project process : 1637 TEP
b) Total annual electrical energy
consumption of the previous conventional process : 3416 TEP
Energy Saving absolute (b-a) = 1779 TEP
Energy Saving relative ((b-a)/a) = 52%
Cost Energy Saving = 77.91 MPta/y
4) MONITORING PROCESS SYSTEM
All the group of processes are controlled by a DCS (Distributed Control System) of a top modern technology.
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Coordinator
08006 Barcelona
Spain
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.