Vobis LLC products

Vobis Pilot Falling Film Evaporators enable clients to separate small kilogram quantities to several thousand kilograms per hour of water or solvent from their product to develop a process which is scalable to even larger scale production. Our Single and Multiple Effect production systems enable efficient production of client products from hundreds to tens of thousands of liters per hour. Mechanical Vapor Recompression (MVR) or Thermal Vapor Recompression (TVR) can be incorporated in the single effect Falling Film System to enhance thermal efficiency and increase cost effectiveness of the system. In addition, our Multiple Effect Evaporator systems can also incorporate mechanical vapor compression or thermal vapor compression capabilities for added energy efficiency beyond the reduced energy use advantages of the multiple effect design.

The Rising Film evaporator, also known as a Vertical Long Tube Evaporator, concentrates a solution by vaporizing the solvent within a column of liquid. The design is simple, reliable, and offers stable operation with minimum CAPEX investment.  Our Vobis rising film evaporators are either single or multiple effect and can be combined with falling film or forced circulation stages as the solids and viscosity increase. At Vobis, we customize each evaporator design depending on the client’s required application with the goal of producing an optimal product with maximum efficiency and cost effectiveness.

Vobis pilot and production scale, single or multiple effect, Forced Circulation Evaporators are recommended for clients seeking to efficiently process viscous process streams, feed streams containing suspended solids, or who have heat sensitive products which have a tendency to foul or scale the heat transfer surfaces of evaporators. These Forced Circulation Evaporator systems can incorporate mechanical vapor compression or thermal vapor compression capabilities for added energy efficiency.

Mechanical Vapor Compression or Recompression (MVR) can be implemented with our single or multiple effect Falling Film Evaporator Systems or our Forced Circulation Evaporator Systems. This enables low temperature operation under vacuum operating conditions and accommodates heat sensitive materials. The systems also have low energy consumption and can eliminate cooling water as a necessity for condensation.  Heat from the condenser is recovered rather than lost and utilized in the evaporation process.

Vobis Multiple-Effect evaporators are designed and implemented to meet the client’s specific requirements and at the same time conserve energy by utilizing and reusing the energy that can be saved among the sequential stages of a production system.  We implement our systems using a combination of Falling Film and/or Forced Circulation evaporator stages with added energy efficiency provided through Mechanical Vapor Recompression (MVR) and Thermal Vapor Recompression (TVR) to utilize the most appropriate combination of separation technologies for the specific application.

Vobis manufactures Wiped Film Evaporator systems (also called agitated Thin Film Evaporators) for high viscosity (to hundreds of thousands of cP), heat sensitive, foaming or fouling applications, for which either high heat transfer or high mass transfer coefficients are required. Our systems offer minimal process fluid hold up, short residence time plug flow evaporation under vacuum conditions. Our WFE evaporator systems can range up to 100m2 of heat transfer surface area.

Vobis designs, constructs, and provides Short Path Distillation (SPD) systems also known as Molecular Distillation Systems or Molecular Stills, or Short Path Evaporation systems. These systems are similar to our Wiped Film Evaporation systems but have an internal condenser inside the evaporator. The condensing surfaces are very close to the product film distributed on the heat transfer surface (which can have an area up to 100m2). Because the internal condenser is physically so close to the heat transfer surface, pressure drop is minimized due to the reduction of the intermolecular interactions of the vapor molecules. This allows operation at extremely high vacuums (less than 1 micron) for use with very heat sensitive natural products. These high vacuum levels lower the effective boiling point for very gentle evaporation of volatile components..