The intervention consists in recovering the heat contained in the fumes coming out of a stenter, a plant used in the textile industry for the finishing and drying of fabrics. The recovered heat is reused to produce hot process water for use within the plant for production purposes. In the past, before the installation of the system, the water, taken directly from the network, was heated by expensive heat (steam). Today, the thermal recovery is carried out by means of a thermal flue/water exchange stage called RC1. This intervention has guaranteed energy savings due to the lower consumption of natural gas used to heat the process water, which was previously produced by means of a 3 t/h steam generator.
Results obtained:
- Thermal energy saving: 1.452.000 kWh/year (400 kWt for 3.300 hh)
- Primary energy saving: 125 Toe/year
- Saving of natural gas: 180.000 scm/year
- CO2 not released into the atmosphere: 351 tons/year
- Payback intervention: about 18 months
The system has been equipped with a monitoring system able to measure and historicize the post-intervention consumption. This is essential for taking stock of and verifying the energy savings achieved.
The intervention has been analysed, designed and implemented by RENOVIS.