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 Expert  729837

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

Available for your Consulting and Expert Witness Needs

Minnesota (MN)
Education Work History Career AccomplishmentsPublicationsConsulting Services Expert Witness Market Research

Summary of Expertise:

Listed with other top experts in: 

Expert is Senior Consultant at Expert's Firm. 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.


air suspension drying


continuous drying


continuous fluidized bed thermal processing


convection heating




dryer energy conservation


dryer productivity improvement




drying equipment design


drying equipment selection


energy-efficient direct-heat dryer


energy-efficient dryer


energy-efficient fluid bed dryer


energy-efficient indirect heat dryer




fluidized bed


fluidized bed drying


indirect dryer


industrial drier


industrial drying


particle fluidization


powder drying


sludge drying


solids drying


spray drying


steam drying

Show Secondary and Basic Areas of Expertise
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;  and Eau Claire, Wisconsin.

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

Work History:
Years   Employer   Department   Title   Responsibilities

2002 to


(Undisclosed Consulting Company)



Senior Consultant


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.

1997 to 2002


Barr-Rosin, Inc.


Marketing & Sales


Business Development of New Dryer Product


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.

1984 to 1997


Bepex Corporation


Thermal Processing Department


Director of Thermal Processing


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.

1982 to 1984


Werner Pfleiderer Corporation


Drying Department


Product Manager


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.

1979 to 1982


Stork Bowen



Product Manager - Fluid Bed Dryes


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.

1971 to 1979


Dorr-Oliver, Inc.


Technology Department


Technical Manager


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.

1969 to 1971


Esso Research & Engineering Company


Process Design


Process Engineer


Prepared heat and material balances, process flowsheets, “P & I” diagrams, equipment sizing and specifications, process control.

Career Accomplishments:

American Institute of Chemical Engineers (AIChE)


Licensed Professional Engineer in Minnesota and in New Jersey.

Publications and Patents Summary

He has 25 publications and 3 US patents.

Selected Publications and Publishers  
 - Powder & Bulk Engineering  
 - Plant/Operations Progress (AIChE Publication)  

Consulting Services:
Recent Client Requests:
  • Expert in Review current process to determine if it is best, current practice.
  • Expert heating sand in a fluidized bed for consulting on under performing sand heater.
  • Expert for consulting on IR Spectrum is altered during the spray drying process.
  • Expert for consulting on new drying technology economic and benefits analysis.
  • Expert in Drying of a PSA Product.
  • Expert in High Solids.
  • Expert in Fluidized beds consultation.
  • Expert in industrial drying heat transfer engineer director for consulting on Consolidation of a belt and fluid bed drying operation.
  • Expert for consulting on Spray Drying
  • Expert for consulting on Continuos Fluized Bed Equipment to assist with equipment selection and sourcing.
  • Drum dryer design expert for consulting on Lignite and stoker coal drying.
  • Expert in Chemical Product Drying System to assists with system evaluation.
Click the green button above to contact Expert for a free initial screening call regarding your expert consulting needs.  Expert is available for consulting to corporate, legal and government clients.  Remember, your initial screening call to speak with Expert is free.

Expert Witness:
Recent Litigation Client Requests:
  • Cellulose acetate expert for consulting on Convection drying using conveyor driers.
  • Fluidized bed dryer expert for consulting on Fluidized bed dryer.
Click the green button above to contact Expert for a free initial screening call regarding expert testimony, litigation consulting and support, forensic services, or any related expert witness services.  A few litigation needs include product liability, personal injury, economic loss, intellectual property (patent, trademark, trade secret, copyright), and insurance matters.  Remember, your initial screening call to speak with Expert is free.

Market Research:
Author and Editorial Advisory Board Member to Powder & Bulk Engineering Magazine (from 2002 to Present).

Click the green button above to contact Expert for a free initial screening call regarding your marketing research, industry research, and company research needs.  For research needs involving multiple experts or secondary research, a Research Director can be assigned to coordinate the work into a custom report for you as a potentially quicker and more cost effective alternative to doing this work yourself or hiring a boutique consultancy.  Remember, your initial screening call to speak with Expert is free.

Additional Skills and Services:

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).

Other Skills and Services

Strong Process Engineering Background; 3 U.S. Patents; 25 Technical Publications.


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