ZAVKOM-ENGINEERING LLC has completed the implementation of several vacuum evaporation plants. Yuri Gennadievich Kombarov, project manager, told the information and analytical portal about UpackUnion Pulp and paper mills about the introduction of vacuum evaporation plants at pulp and paper Plants for the evaporation of black liquor.
A set of measures at the Customer's facility was implemented as part of a project to eliminate accumulated environmental damage and ensure the safety of hydraulic structures at the landfill for the disposal and burial of toxic industrial waste.
Thus, our turnkey supply services for vacuum evaporation units include:
- Development of detailed construction documentation
- Manufacturing, assembly and supply of process equipment for the unit
- Installation, supervision and commissioning work
«The essence of evaporation is to concentrate the liquor by removing excess water in order to prepare it for flaring in the furnace chamber of soda-regenerating water heater. At the same time, the liquor is concentrated during a two–stage process»
Thus, at the first stage, the lye is concentrated from 9-10% to 50% of absolutely dry substances in evaporation stations consisting of six-seven-stage evaporation bodies operating according to a counter-current or mixed scheme of supplying steam and evaporated solution. At the second stage, the liquor is concentrated to 70-80% in single- and double-effect evaporation plants.
«The evaporation units at the pulp and paper Plant are equipped with evaporators of large unit capacity (heat exchange surface up to 3,500 m2). The evaporation process at our plants and the installations for its implementation in the Central processing Plant are a reflection of the best international experience. The evaporation units at the pulp and paper mill can be used to implement environmental and nature conservation measures as part of local treatment facilities. At the same time, they allow minimizing the amount of liquid effluents generated and ensuring the return of part of the water resources used to the production cycle of the pulp and paper Plant»
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