Expert Details

Expert in Industrial Drying of Solids - Convection Dryers, Conduction Dryers, Water or Solvent Evaporation

Expert ID: 729837 Minnesota, USA

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Expert is Senior Consultant at American Drying Consultants. He is a chemical engineer with over 30-years experience dealing with dryers & thermal processing equipment. His experience includes process design, pilot scale testing, and commercial plant start-ups. His commercial experience has dealt with customers in the chemical process industries (i.e. chemicals, polymers, minerals, etc.), as well as with clients in the municipal wastewater treatment market. His business background has been global in nature - - - serving customers in North America, Latin America, Western Europe, and Asia. Mr. Walsh's areas of expertise include not only Direct Contact - Convection Dryers (flash dryers, fluid bed and rotary-type dryers, hopper dryers, spray dryers), but also various types of Indirect Contact - Conduction Dryers (paddle, disc, & screw dryers), as well as Mechanical De-watering Equipment (centrifuges, vacuum filters, filter presses) and Fluid Bed Incinerators. In addition to water evaporation in open-cycle air circuits, he has considerable expertise with solvent drying and recovery in closed-loop systems.


Flash Dryer (with or without external back-mixing, simple or ring-type for extended residence time);
Fluid Bed Dryer (back-mixed or plug flow designs, in-bed heating coils, multi-zone, final cooling stage);
Hopper Dryer (column dryer - plug flow - long residence time);
Rotary-type Dryers;
Spray Dryer.


High-Speed Paddle Dryer (thin-layer rotary dryer);
Low-Speed Paddle Dryer (single or multiple heated rotors - non-plug flow);
Hollow Disc Dryer (single or multiple heated rotors - non plug-flow);
Hollow Screw Dryer (single or twin heated helical rotors for plug-flow);
Spiral Dryer (pneumatic conveying dryer with heated rotor and jacketed cylindrical vessel wall);
Rotary Blender Dryer (batch operation, jacketed vessel, paddle or double-helical rotor).


Decanter (Solid Bowl) Centrifuge;
Rotary Vacuum Filter;
Plate & Frame Filter Press;
Continuous Belt Press.

Expert may consult nationally and internationally, and is also local to the following cities: Minneapolis, Minnesota - Saint Paul, Minnesota - Rochester, Minnesota - Burnsville, Minnesota - Saint Cloud, Minnesota - Eden Prairie, Minnesota - Minnetonka, Minnesota - Eau Claire, Wisconsin

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Year Degree Subject Institution
Year: 1969 Degree: BChE Subject: Chemical Engineering Institution: City College of New York

Work History

Years Employer Title Department Responsibilities
Years: 2002 to Present Employer: Undisclosed Title: Senior Consultant Department: Responsibilities: Analysis of plant (or pilot plant) operating data,
Engineering study to increase existing dryer capacity,
Methods to decrease existing dryer heat load,
Converting from Open-Cycle to Closed-Cycle drying circuit,
Recommendations as to various types of thermal processing equipment,
Process Engineering, Equipment Sizing, Process Flow Diagrams - Heat & Material Balances,
P&ID schematics,
Advice on Dryer System Interlocking,
Participation at meetings with Client and potential vendors,
Witnessing pilot plant tests & evaluation of pilot plant reports,
Bid tabulation review of vendor quotations,
Process start-up advisory services,
Investigation of possible causes for dryer failures,
Ways to eliminate or control dryer fires.
Years: 1997 to 2002 Employer: Barr-Rosin, Inc. Title: Business Development of New Dryer Product Department: Marketing & Sales Responsibilities: Technical, Marketing, & Sales Responsibilities:

Established Technical Credibility for Barr-Rosin among Major Polymer Resin Producers;
Built Prototype Pilot Plant;
Trained Employees (3 Process & 5 Sales Engineers), as well as Sales Reps (8 firms);
Quotation Proposals and Presentations;
Promo - - - ads, press releases, brochures, technical papers, seminars, trade shows, direct mail.
Years: 1984 to 1997 Employer: Bepex Corporation Title: Director of Thermal Processing Department: Thermal Processing Department Responsibilities: Directed staff of process application engineers.
Risk management analyses and control with respect to process and equipment warranties.
Technical presentations to customers.
Purchase order negotiations.
Years: 1982 to 1984 Employer: Werner Pfleiderer Corporation Title: Product Manager Department: Drying Department Responsibilities: Established new dryer business in U.S. marketplace with full profit and loss responsibilities. Increased sales from zero base to $3.0 MM.
Managed technology transfer from European parent company.
Identified targeted market applications based upon technical suitability, competitive position, market size and growth rate, and potential sales volume.
Promotional activities - - - advertising, press releases, technical papers, trade shows, direct mail.
Sales functions - - - quotation proposals, technical presentations, purchase order negotiations.
Years: 1979 to 1982 Employer: Stork Bowen Title: Product Manager - Fluid Bed Dryes Department: Responsibilities: Negotiated license agreement with Japanese know-how owner.
Managed technology transfer from Japan.
Identified targeted market applications.
Full P&L responsibility.
Issued quotation proposals, conducted technical presentations, and purchase order negotiations.
Years: 1971 to 1979 Employer: Dorr-Oliver, Inc. Title: Technical Manager Department: Technology Department Responsibilities: Technical support to Sales & Engineering Departments:
Product positioning analyses.
Technical presentations to clients and foreign licensees.
Developed sales tools, including simplified equipment sizing manuals and process flowsheets.
Reviewed proposal specifications - risk analyses of process and/or equipment operation with respect to performance guarantees and liability exposure.
Issued detailed design manuals for new products (sludge conditioning and filter press dewatering).
Technical management of prototype plant start ups.
Years: 1969 to 1971 Employer: Esso Research & Engineering Company Title: Process Engineer Department: Process Design Responsibilities: Prepared heat and material balances, process flowsheets, “P & I” diagrams, equipment sizing and specifications, process control.

Career Accomplishments

Associations / Societies
American Institute of Chemical Engineers (AIChE)
Licenses / Certifications
Licensed Professional Engineer in Minnesota and in New Jersey.
Publications and Patents Summary
He has 25 publications and 3 US patents.

Additional Experience

Training / Seminars
Technical Instructor for an Industrial Drying Course at The Center for Professional Advancement, in East Brunswick, NJ and in Amsterdam, The Netherlands (from 1986 to 2002).
Marketing Experience
Author and Editorial Advisory Board Member to Powder & Bulk Engineering Magazine (from 2002 to Present).
Other Relevant Experience
Strong Process Engineering Background;
3 U.S. Patents;
25 Technical Publications.

Fields of Expertise

air suspension drying, continuous drying, continuous fluidized bed thermal processing, convection heating, drier, dryer energy conservation, dryer productivity improvement, drying, drying equipment design, drying equipment selection, energy-efficient direct-heat dryer, energy-efficient dryer, energy-efficient fluid bed dryer, energy-efficient indirect heat dryer, flash-drying, fluidized bed, fluidized bed drying, indirect dryer, industrial drier, industrial drying, particle fluidization, powder drying, sludge drying, solids drying, spray drying, steam drying, dust collector system, chemical process design, energy consumption, energy requirement, thermodynamic heat-transfer coefficient, particle-size control, sludge heat treatment, particle-size reduction, direct dryer, particle-fluid separation, sewage dewatering, liquid-solid extraction, moisture loss, wet-and-dry bulb hygrometer, contact condenser, rotary dryer, superheat, continuous fluidized bed thermal processing material balance, material balance, fluidized bed thermal processing, thermal processing, fluidization, psychrometer, elutriation, powder processing equipment design, packed bed drying, spiral plate heat exchanger, fluidized bed heat treatment, fluidized bed cooling, convection heating system, sludge dewatering, psychrometric chart, productivity improvement, dryer process calculation, solid material handling, chemical plant explosion, continuous solid handling machine, energy-efficient process heating system, waste-heat recovery, pneumatic conveying, dew point, solvent extraction, enhanced convective heat transfer, air heater, steam, energy efficiency, powder, explosion, fluid flow, unit operations, thermodynamics, slurry, humidity, hopper, heat transfer, heat conduction, gas-liquid heat exchanger, forced-convection heat exchanger, fluidized-bed sludge incineration, evaporation, dehumidification, conventional cooling, condensing heat exchanger, heat exchange condenser, chemical engineering

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