RTO at waste processing company

Additional waste heat recovery from the flue gas of a Regenerative Thermal Oxidizer (RTO) is expected to result in a flue gas outlet temperature reduction from 200 to 76 °C and additional energy recovery of 740 kW.

Regenerative Thermal Oxidizer (RTO) of an industrial factory
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Regenerative Thermal Oxidizer (RTO) of an industrial factory

Lower fuel consumption of RTO

740 kW additional heat recovery

Corrosion resistant solution

Heat recovery from RTO

The customer, a waste processor, has the ambition to make their waste processing process more sustainable. One of the opportunities they identified is additional heat recovery from their RTO installation. A metal air preheater was already installed at the outlet of the RTO. Further heat recovery with an additional metal plate heat exchanger is not possible because of ammonium sulphate deposition that causes fouling and corrosion problems.

Study on how to recover more heat

HeatMatrix did further analysis on this thermal process for the customer. Further cooling of the flue gas through the acid dew point is possible with an additional polymer air preheater. This polymer air preheater handles the sulphuric acid formed while cooling the flue gas and enables additional heat recovery. Also the depositing ammonium sulphate can be cleaned off easily.

Additional energy recovery of 740kW

When the flue gas is cooled down to a temperature of 76 °C this will result in an additional energy recovery of 740 kW. 

Specifications

Solution has a duty of 740 kW
Flue gas flow 22,000 kg/hr
Temperature flue gas flow 200 °C
SO2 concentration 20 mg/Nm3
Proposed system HeatMatrix Polymer Air Preheater
Process flow diagram (PFD) of a HeatMatrix polymer air preheater installed in series with a metal air preheater on a Regenerative Thermal Oxidizer (RTO)

No corrosion and fouling problems

"Fouling and corrosion problems limit our heat recovery, preventing us to make our operations more sustainable. Very happy to know there's a solution to recover more heat from our RTO without corrosion and fouling problems."
Waste ProcessorMaintenance Manager
Waste Processor

For more than 10 years we design and deliver heat recovery systems for industrial factories

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Technical Assessment of your RTO

Our process engineers assess the technical feasibility of additional heat recovery on your RTO, or any other thermal process. Your potential reduction in CO2 emissions, energy consumption and costs is determined by our experts.

  • Analysis of process data of your RTO
  • Minimal input data required
  • Business case on your savings potential
HeatMatrix technical assessment of heat recovery on a Regenerative Thermal Oxidizer (RTO) or Incinerator
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