Industrial Process Drying

Air Heater Coils, Bespoke Dryers & Heat Recovery to Drying Opportunities

Air Heater Coils

Turnbull & Scott is renowned for the design and manufacture of high end, robust Air Heater coils and batteries which are extensively used in industrial process drying applications worldwide. These are designed for use with steam, condensate, water/glycol mixes, thermal oil or other hot process fluids as the heat source.

The most common method for the drying of solids across industries is to introduce hot air to the product and evaporating the moisture contained to required levels.

Trusted OEM Partner

Our steam coils are widely used by OEMs for integration into their specialist processing equipment which either involves a drying stage or is entirely drying focused placing them at the heart of the textiles, food processing, pulp & paper, chemical, timber, biomass, grain & seed industries.

Manufacturing and Process Industries

The company also works hand-in-hand with in-house Engineering teams across the manufacturing and processing industries to design bespoke new or replacement air heater coils for their production systems.

Process Drying in warehouse

Bespoke Dryers

Turnbull and Scott design and manufacture fully packaged skid mounted dryer units or frame based dryer units complete with electric motors and fan assemblies ready for installation.

These are often designed for heating air using hot water (LPHW) from a traditional or biomass boiler or waste heat from a CHP engine for example, but they can also be designed and manufactured for use with steam, thermal oil or other process fluids.

Applications for our packaged driers include the drying of grain, timber, woodchip, wood-pellets as well as other materials. Typical configuration:

  • Air Heater Coils- cooper tubes with aluminium fins (carbon or stainless steel as alternatives) and galvanised steel casing
  • Fan with 3 phase 415V electric motors
  • Skid based stainless steel frame to facilitate placement by forklift
  • Range of control options -cost saving inverter to control fan motor speed or automatic fan controls

Capturing Waste Heat for Process Drying Applications

From its origins supporting the steam and heat transfer needs of the world renowned textiles industry in The Scottish Borders, Turnbull and Scott has expanded its reach to almost every other modern processing industry providing liquid-to-air, air-to-liquid and air-to-air heat transfer systems for many industrial applications including process drying.

The temperature of waste heat can vary greatly, from gas streams of several hundred °C to temperatures down to 40°C from other sources.

Offering a full design, manufacture and installation service, our thermal energy experts will consider all the characteristics of the available waste heat and work with you to establish how best to apply recovered flue gas, steam condensate or other process heat to your drying application.

Economiser Battery

Waste Heat Recovery for Process Drying

Reduce Energy consumption by Re-purposing Waste Heat for Process Drying

Ever increasing energy prices and commitments to reduce CO2 emissions force us all to reconsider energy usage and today that includes identifying waste heat sources within our industrial processes and determining how to capture and reuse that waste heat.

Waste heat energy from flue gas and other process heat is commonly around 15-20 % . Much of this can be captured and re-purposed for drying applications, as well as other industrial uses, bringing the potential  to reduce fuel consumption by 12-16% as well as an equivalent reduction in CO2 emissions.

Turnbull and Scott typically design and manufacture waste heat recovery solutions from heat sources discharging heat to 560°C using stainless steel heat exchangers and up to 400°C using carbon steel.

Heat Recovery Specialisms:

Gas/Air to Liquid

Liquid to Gas/Air

Gas/Air to Gas/Air

Industries & Sectors:

  • Nuclear
  • Textiles
  • Paper
  • Oil & Gas
  • Food Processing
  • Distilleries
  • Co-generation/CHP plants
  • OEMs

Common waste heat sources

  • Process waste water/fluids
  • Process steam condensate
  • Cooling water from high temp. applications
  • Steam boiler exhaust
  • Gas turbine exhaust
  • Reciprocating gas engines
  • Drying ovens/kilns

Common uses for waste heat

  • Process heating
  • Drying ovens/kilns
  • Combustion air pre-heating
  • Steam/ hot-water boiler feedwater pre-heating
  • Building space heating

Contact us on Process Drying

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