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SubCom® Liquid Heating Solutions

Inproheat Industries - SubCom® Liquid Heating Solutions

Direct Contact Heat Exchanger Solutions

SubCom®’s robust direct fired heaters have taken on the toughest operating conditions and set a new standard for direct-contact liquid heating solutions through our direct-contact heat exchangers and direct-contact heat transfer capabilities.

Low emissions burners, reduced maintenance costs, durable construction, and short payback periods that lead to unparalleled efficiency that can approach 100% make SubCom® direct fired heaters an excellent choice for direct contact process liquid heating.

Submerged combustion will outperform other heating methods, especially in dirty and corrosive conditions where direct contact heating greatly improves performance.

Liquid Heating Industry Focus

The benefits of SubCom® direct fired heaters in a liquid heating application make it the best direct contact heating method for challenging liquids and slurry streams.

SubCom® direct fired heaters also excel in the heating of dense slurries. SubCom®  is an intrinsically highly efficient heating technology with no fluid passages to plug with solids or heating surfaces to scale over. That efficiency is further optimized by the turbulent action of steam sparging or gas sparging, which keeps solids suspended in the liquid heat burner and increases the overall heat transfer rate making it very energy efficient.


The mining industry offers significant opportunities to demonstrate the power of liquid heating solutions offered by SubCom® direct fired heaters. This is due to the breadth of projects available.

Key mining applications for SubCom® direct fired heaters include:

  • Copper, gold and other heap leach lixiviants
  • SX/EW solutions
  • Mine waste water
  • Brine solutions for potash, lithium and other salt process solutions
  • Iron ore concentrate slurries for pelletizing process
  • Calcium chloride and copper sulphate concentration
  • Ore and concentrate slurries
  • Agitated tank leach heating
  • Reagent mixing water
  • Utility water

Natural Gas

The continued growth of the natural gas industry has made the liquid heating technology offered by SubCom® direct fired heaters a welcome and sought-after component within this sector.

The most common applications for SubCom® direct fired heaters in natural gas are:

  • Frack water heating
  • LNG vaporization
  • Produced water heating for water treatment

Oil Sands

SubCom® direct fired heaters are highly-respected for their liquid heating efficiency for clients who are operating projects in the oil sands.

Notable liquid heating applications in oil sands environments for SubCom® direct fired heaters include:

  • Oil sand slurry hydrotransport
  • Recycle water

Waste Water

Liquid heating solutions provided by SubCom® direct fired heaters are efficient in waste water applications that feature pond treatment, treatment tanks, and pasteurization.

A few of our specific waste water project applications for SubCom® direct fired heaters are:

  • Sludge pasteurization
  • Effluent holding and treatment ponds
  • Aerobic and anaerobic treatment tanks
  • Water pond freeze prevention


Beyond the aforementioned industry applications, liquid heating solutions provided by SubCom® direct fired heaters are also valuable in several unique project environments such as:

  • Acid baths
  • Aggregate wash plants
  • Carpet and fabric manufacturing
  • Plywood and veneer log ponds and conditioning chests
  • Industrial process solutions
  • Evaporation pond performance enhancement

Recent Case Study

Compass Minerals

Liquid Heating Cut Sheets

SubCom Liquid Heating Cut Sheet


Liquid and slurry heating system applications can present unique challenges requiring precise and effective solutions built on knowledge, consistency, and proven results to provide direct heating solutions through our direct heating exchangers. For clients seeking the optimum solution in liquid heating project environments, SubCom® direct fired heaters meet these challenges with the high levels of efficiency and availability that they expect from Inproheat Industries.