Chemical Processing Equipment

Chemical Processing Equipment

Swenson Technology, Inc.

Whiting Equipment Canada Inc. is a licensee of the internationally recognized and accepted line of Swenson Technology Inc. evaporation and crystallization equipment and systems for the chemical processing industry. Swenson has been pioneering process equipment since 1889. Whiting has been producing chemical processing equipment since 1930. Related services from our Welland facility cover all aspects of the Customer’s requirements including design, engineering, fabrication and “start-up” assistance to ensure the efficient and reliable operation of the equipment provided. Whiting Equipment Canada Inc has recently designed and supplied multiple island turnkey plants for salt, potash and sodium chlorate. Typical scope of supply ranges from engineering and feasibility studies to a fully integrated process including structural steel, vessels, piping, instrumentation and electrical components. Whiting can upgrade systems that have been engineered by other manufacturers for a more efficient and superior yield.

Swenson Chemical

Whiting Equipment Canada’s Test Centre

Bench Scale Testing

Whiting can upgrade systems that have been engineered by other manufacturers for a more efficient and superior yield. Whiting Equipment Canada’s Test Centre is equipped for chemical analysis and to determine solubility, crystallization habit, and physical properties of inorganic chemical solutions. Chemical analysis assists in producing more precise designs and facilitates more economical up-scaling of equipment.

Our Test Centre

Our Test Centre, located at Brock University in St. Catharines, Ontario, Canada, is equipped for chemical analysis and bench scale process development in glassware to determine solubility, crystallization habit, and physical properties of inorganic chemical solutions. The partnership between Brock University and Whiting Equipment Canada resulted in the creation of the Whiting and Swenson Test Centre, Niagara Campus, at the state of the art BioLinc incubator facility.

The collaboration between Whiting Equipment Canada and BioLinc allows Whiting to provide Brock University the opportunity to grow in engineering, graduate and undergraduate research, and to promote entrepreneurship. The collaboration also allows Whiting to give back to the community and promote a strong manufacturing and engineering presence within the Niagara region.

The test centre is equipped with everything necessary to turn a liquid feed into a dry solid. Operational tests are designed so that the test product will resemble the final product as closely as possible for customer evaluation.

Using these test results, Whiting engineers can assist customers in making knowledgeable decisions and suggest the appropriate equipment for industrial sized applications.



An evaporator is used to evaporate a volatile solvent, usually water, from a solution. Its purpose is to concentrate non-volatiles solutes such as organic compounds, inorganic salts, acids and bases. Typical solutes include phosphoric acid, caustic soda, sodium chloride, sodium sulfate, gelatin, syrups and urea. In many applications, evaporation results in the precipitation of solutes in the form of crystals, which are usually separated from the solution with cyclones, settlers, wash columns, elutriation legs or centrifuges. Examples of precipitates are sodium chloride, sodium sulfate, sodium carbonate and calcium sulfate. The desired product can be the concentrated solution, the precipitated solids, or both. In some applications, the evaporator is used primarily to recover a solvent, such as potable water from saline water. In any case, the relatively pure condensed water vapor from many evaporators is recovered for boiler feed makeup, salt washing, salt dissolving, pump seals, instrument purges, equipment washing, line washing and other uses.


Crystallization is the process by which a chemical is separated from solution as a high-purity, definitively shaped solid. While crystallization is a unit operation embracing well-known concepts of heat and mass transfer, it is nevertheless strongly influenced by the individual characteristics of each material handled. Therefore, each crystallization plant requires many unique features based upon well-established general principles. Each application must be evaluated on an individual basis to achieve optimum results. Whiting Equipment Canada builds a wide range of general and special purpose crystallizers for the chemical process industries. Crystallization can be achieved by multiple methods including lowering the solubility of the solution by cooling the liquor, concentrating the solution to saturation via evaporation, and crystallization through chemical reaction.


  • Fluorine Recovery
  • Continuous Sugar Crystallization
  • Caustic Soda System
  • Ammonium Sulfate Crystallization and Drying
  • Potash Crystallization and Drying
  • Salt Crystallization and Drying
  • Salt Purification through Sodium Sulfate Removal
  • Sodium Sulfate Recovery and Drying
  • Sodium Chlorate Crystallization and Drying
  • Wet Process Phosphoric Acid


The Swenson line of drying equipment has been manufactured since the chemical engineering pioneer Magnus Swenson founded the company in 1889. Swenson’s extensive line of drying equipment allows our engineers to select the optimal solution for a wide variety of drying problems. Swenson long ago recognized the customer’s need for product testing. The information available through testing is crucial to the success of the ultimate full-scale production application.


Swenson Test Center

Using first hand dryer test results obtained in the Swenson Test Center, our engineers can assist customers in making knowledgeable decisions about drying techniques and recommend the appropriate, full-scale production equipment. The test center, located in Harvey, Illinois, is a completely equipped laboratory able to pretest, in either production or pilot operations, virtually any product. In addition to crystallization and evaporation testing equipment, the test center maintains a variety of dryers. These include a fluid bed dryer, a rotary air swept dryer, a flash dryer, a spray dryer, and a steam tube dryer.

Drying Process

Fluid Bed Dryer

  • Closed
  • Direct Fired
  • Indirect Heated


  • Direct Fired
  • Indirect Heated
  • Steam Tube


The process of separating solids from liquids embraces a wide variety of problems and materials, from colloidal suspensions to magmas containing coarse crystals which settle so rapidly that it becomes difficult to maintain a uniform suspension of solids by means of mechanical agitation. In general, any suspension in which the solids settle readily can be filtered on top-feed filters and, hence, they are limited to the coarse, rapid-settling crystalline solids – especially where the solids are to be dried on the filter and where washing is not especially important. Top-feed filters should not be used if a turbid filtrate is objectionable.


Top-Feed Drying Type Filter

Coarse crystalline solids form an exceedingly porous filter cake through which large volumes of air can be drawn, still maintaining a comparatively low vacuum in the system. Vacuums of 2 to 2½ in. of mercury, with exhauster capacities of 150 c.f.m. of air at 70°F/ft2 of filter area are not uncommon. By preheating such large columns of air, the material can be discharged in a completely dry state. For any given material, the temperature of the air to the filter varies with volume per square foot of filter area.


  • Direct Type
  • Surface Type

Contact Olivier Butete at for more information. 

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