Case study 8:

 Saint-Maurice l´Exil, France

Heat and resource recovery in chemical incineration plant

Heat and resource recovery in chemical incineration plant

Aim is to reduce pollutant load in flue gas cleaning water of the incineration facility for hazardous and non-hazardous liquid waste.

In Saint-Maurice l´Exil, France´s most important chemical platform, operates an incineration facility for hazardous and non-hazardous liquid waste. SUEZ SMART SOLUTIONS and SUEZ RR IWS CHEMICALS aim to recover thermal energy and materials from the water used to wash flue gases which result from incineration to make this sector of the chemical industry eco-friendlier and more sustainable.

A concept study evaluates the potential to recover thermal energy from hot flue gas washing water as it is cooled down from 88°C to 30°C during the first step of the wastewater treatment. The water temperature is lowered by heat exchangers installed in the plant. Feasible solutions that can be coupled to the heat exchangers for on-site steam and/or electricity production are identified.

Sulphur recovery from flue gases and effluents will be studied. This will broaden the chemical spectrum of liquid waste treated on site and concomitantly reduce the formation of waste gypsum in the on-site industrial wastewater treatment plant.

A second concept study investigates the potential to recover metals, such as Fe, Cu or Zn, as marketable products from liquid waste.

Additionally, software will be deployed, and advanced data-driven techniques will be integrated in real-time monitoring of the WWTP for automatic diagnosis, predictive analysis, and intelligent alarms.

Key innovations & actions

  • Manufacturing of a product from the sulphur dioxide
  • Physical chemical wastewater treatment plant modification
  • Energy production from hot scrubbing water

Sectors

Partners

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