Company

Wolford, Bregenz

The goal:

• Complete supply of the dye-works including heat recovery
• Use of waste water heat to preheat process water as well as feed water. In addition, the waste water heat is fed into the heating system.

Our solution:

Separation of cold and hot waste water when discharging it from the textile machines:

• Separate waste water collection tanks (cold water 120 m³, hot water 100 m³) 
• 3 countercurrent heat exchangers (special construction for textile waste water)
• Feed into the process water tank 200 m³
• Feed into the feed water tank and the heating system

The data:

• Daily water consumption of the dye-works: 2,000 m³
• Heat recovery from waste water: 44,450 kWh/day
• Heat recovery from cooling: 31,000 kWh/day
• Heat recovery from compressors: 26,200 kWh/day
• Total heat recovery approx.: 101,650 kWh/day
• Total heat recovery approx.: 27 million kWh/year
• Annual savings of EUR 540,000
  at an energy price of 0.02 EUR/kWh
• Amortisation: 1 year