Plate heat exchanger, raw water
BACKGROUND
At this paper mill, a heat exchanger, heating raw water to the facility's water plant, were losing efficiency. In 2002 cleaning of the exchanger was conducted but the result was less than satisfactory and in 2003 decision was made to conduct a second cleaning.
RESULTS
After cleaning operation the temperature of the outgoing water was increased by 11,9°C, a huge improvement. The cleaning was conducted with minimal disturbance to other activities. Furthermore, there were no need to either seal off the working area or need for extra protective equipment. By using Bio Gen Active® Scale 130 a very successful reconditioning with minimal impact on the environment was achieved.
| Temp °C | Prior 2003 | After 2003 | Prior 2004 | After 2004 |
| Water in | 10,0 | 10,0 | 7,0 | 7,0 |
| Water out | 28,1 | 40,0 | 19,0 | 28,0 |
| Secondary water in | 62,0 | 62,0 | 62,0 | 62,0 |
| Secondary water out | 56,6 | 49,4 | 60,0 | 53,0 |
DESCRIPTION OF APPLICATION
| Sector: | Pulp and paper |
| Application: | Raw water heat exchanger |
| Product: | Bio Gen Active® Scale 130 |
| Deposit: | Limescale and metal oxides |