BOLZ Process Technology GmbH

Series MF 010 - MF 1200

The BOLZ-SUMMIX conical screw dryer is a vacuum contact dryer. Due to its contained closed system and indirect heating of the product it is particularly suited for drying hazardous and toxic products to a very low final moisture content. As a result of its unique, very gentle mixing character, even mechanically sensitive products are not destroyed. The product quality after the drying process is reproducible and as good as that of the initial product, whereas the driving forces required are very low.

The achievable, high endvacuum ensures low drying temperatures which is a clear advantage when drying temperature-sensitive products. It also ensures good heat transfer rates and short drying times, while at the same time requiring only little energy. The short drying times and the high containment level of the fully closed system make the conical dryer the best choice in instances where environmental and/ or product requirements are strict and remarkably high.

Special properties for the customer’s benefit:

• Fully closed contained system
• Very high containment level, almost 100% solids and solvent recovery
• Operator safe, product and environment friendly
• Wide product flexibility as well suited for multi-product/ multi-process application
• High process flexibility in the range of drying, mixing, homogenizing, re-wetting etc.
• Very gentle product handling
• Optimized CIP facilities with complete liquid drain and verified CIP reproducibility
• Short drying times given by a minimize screw-to-wall clearance
• Improve of the product quality and reduction of the drying time by use of a heated mixing screw
• Almost 100% product discharge by gravity
• Filling volume 10-100% of working capacity
• Low drive power compared to other systems
• Reliable drive systems with proven sealing system
• Safe and ATEX compliant
• Clean room installation in the feed area or the dryer discharge area is possible
• Various options and design details

Conical Screw Mixer

Series SF 010 – SF 3000

The BOLZ-SUMMIX conical screw mixer works according to the proven principle of a rotating mixing screw being guided along the wall of the conical vessel at constant close distance by means of an orbital arm. The product flow maintains an intense yet gentle mixing and product displacement. Suited for demanding bulk solids of the pharmaceutical, chemical and food industries, it ensures a unique and gentle mixing process.

Special properties for the customer’s benefit:

• Small drive power without mechanical or thermal product demolition by wear/attrition
• High mixing result and effciency, perfect blending and good mixing time
• Unique suitability for a wide range of industrial products with various character like density, particle size and shape, proportions etc. without risk of segregation
• Maximum flexibility with just partial load from 10 to 100%
• Well suited for multi-product application and frequently changing product volume
• Central, unrestricted and residue-free product discharge with a homogeneous product flow
• Good cleanabilty with a complete and residue free drain of cleaning fluids

Conical Screw Cooker

Series DF 050 - DF 600

Mixing, stirring, cooking and sterilising are basic operations in food production and processing. The BOLZ-SUMMIX cookers with their conical construction and rotating mixing screw, have proven particularly useful for processing natural products such as coffee beans, cocoa nibs, gluten or nuts such as chestnuts. Various processes can be realised such as a heat treatment process by direct steam injection and heated jacket with continuous mixing, injection/absorption of process liquid, cooking and sterilising as well as extraction of components.

Special properties for the customer’s benefit:

• Short process time with gentle and effective product mixing and intensive heat transfer
• Injection of steam via a ring channel
• Vacuum and pressure rated equipment
• Total drain of solid and liquid in a short time
• Flexible hence suited for a wide range of products, process and heat treatment
• Quick adding of required process liquids

Cylindro Conical Dryer

Series CCD (100 - 20,000 liters)

The Cylindro Conical Dryer CCD with a central shaft agitator was developed to be used both as a dryer (e.g. for filter cake) and also an evaporator when products have to pass a critical phase change from fully liquid to final bulk solid. The robust mixing element is showing its effective performance also during liquid and high viscous pasty phase to finally achieve the desired solid phase. As a dryer it is designed with a vacuum-/pressure rated vessel, heating jacket and integrated dust filter. Like for the CCM  (Cylindro Conical Mixer) also the CCD offers a big advantage with a compact and space saving design.

Special properties for the customer’s benefit:

• Short drying times because all product of the batch is permanently in motion thanks to a heated helix agitator (optional)
• Uniform heat distribution during the process without cold spots
• Variable speed of the helix agitator for optimum product quality
• Useful working volume from 15% to 80% of the gross volume
• Suitable for powders, liquids and pastes
• Very good discharging
• Very good heat transfer (high k-values)
• Shaft sealing and bearings installed outside of the drying chamber
• ATEX design and EHEDG compliant design

Cylindro Conical Mixer

Series CCM (100 - 20,000 liters)

The Cylindro Conical Mixer CCM with a central shaft agitator is a batch mixer for more standarized mixing applications with rather low TCO (Total Cost of Ownership). With its robust central-shaft agitator it is pricewise an alternative to the conical screw mixer and besides powder/bulk solids also suitable for pasty products. Due to its compact design the mixer is particularly suitable when space is limited, especially for a narrow room height.

Special properties for the customer’s benefit:

• Short mixing times because all product of the batch is permanently in motion
• Speed of the helix mixing element can be adapted to the process needs
• Useful working volume from 15 – 70% of the gross volume
• Adjustable clearance between helix/blade and vessel wall or bottom outlet
• Wide range of applications for powders, liquids and pastes
• Very good discharging
• Shaft sealing and bearing are installed outside of the mixing chamber
• ATEX design and EHEDG compliant design

Pilot Plant BS-pilotDRY

BS-pilotDRY® Series ML001 - ML010

The pilotdryer BS-pilotDRY from BOLZ is well suited for a wide range of various pilot-scaled trials and tests within the product and process development, but also for ongoing quality monitoring of a production. Mainly used as a traditional conical screw dryer, in addition it can also be used as a central shaft dryer. The hybrid stirrer technology allows drying and mixing processes to be simulated and tested in only one appliance using different mixing tools. Therefore relevant comparisons are possible which facilitate the selection of the most suitable stirring mechanism or agitator tool for the product and thus for the future production equipment.

Special properties for the customer’s benefit:

• Mobile and portable skid design
• Simple „plug and use“ installation
• Complete process unit with ancillaries
• Flexible filling volume 10 to 100%
• CIP-cleaning included
• All product contact surfaces heatable
• Suited for a wide range of processes
• Ideal for „scale-up“ calculations
• Optional with central shaft agitator

Laboratory System BS-miniDRY

BS-miniDRY® DKL015

Especially for the simulation of complex processes and production steps in research and development, BOLZ developed the BS-miniDRY. Thanks to its compact design and ready for “plug and use” it is simple to install and flexible to use. Identically designed like a bigger production scaled conical screw dryer, it is perfect for product trials and scale-up. A wide range of drying and mixing process steps can be simulated by making use of the flexible filling volume, already starting with a feed of only 150 ml.

Special properties for the customer’s benefit:

• Mobile, compact and easy transport design
• Easy installation „plug and use“
• Designed to fit into a ventilation booth
• Flexible filling volume 10 to 100%
• Ideal for „scale-up“ calculations
• CIP-cleaning included
• Possibility for various changes of the agitator tool (from orbital arm system to various central shaft agitators)
• Designed as a complex process system or also as a reduced economical version