Top: Hydro Testing of Heat Exchanger
Svenmill Fabrics Project Description:
This project by Tekníva covered the design, manufacturing, installation and commissioning of a recovery heat exchanger to minimize the steam consumption at a textile mill.
The unit comprises a rectangular tank that takes 24 plate type heat exchanger elements connected in a cascade arrangement. All components are
Saving in Heating Steam - 610 kg/h
Equivalent Fuel Saving - 38.1 kg/h at 16 kg steam / kg HFO
Hourly Cost Saving - R56.20 at R1,40 / liter HFO
Annual Cost Saving - R115,103 at 8 hrs / day, 5 days / week
Capital Investment (Heat Exchanger) - R89,000
Return on Investment - 9.3 months (< 1 year)
Left - Install Unit, Right - Elements revealed
manufactured from 304 stainless steel.
Dirty water comes in at 70 °C, cascades over the elements and heats 12 000 kg/h clean water from ambient to 35 °C at the first take off and 42 °C at the second. The heat exchanger comes complete with isolating and drain valves and temperature indication. Automatic temperature control can be fitted if required.
The unit is designed with the particular objective of ease of cleaning the plate elements. Although the plates are normally cleaned in situ, each element can also be individually removed and cleaned should this be required.
Commissioning Results - (Sept 2001):
Total Heat to Rinsing Water - 750 kW
Heat Recovered in Heat Exch - 339 kW or 45% of total
