Preconcept on the filtration of water supply of kettles (LA27)

ISSUE

A pulp & paper mill located in southeastern Quebec (CA) operates a water treatment plant producing the water required for these kettles. The plant must produce nearly 50 m3 / h of water containing less than 1 ppm of suspended solid and less than 10 colour units. Then, the water passes through an ion exchange resins before entering the kettles. However, the filter used before the ion exchange units does not provide constant water flow and quality. Therefore, the factory had to use the city water to cover the water makeup shortage. The plant, therefore, called STS Canada to help them identifying and sizing the most suitable separation equipment to produce water quality that meets their needs on a continuous basis.

TECHNOLOGICAL CHALLENGE

The challenge of this project was to identify and size the filtration technology that would produce 50 m3 / h of clarity water from the filtrate at 1 ppm of suspended matter and 10 units of colour from river water.

RECOMMENDED SOLUTION

In the beginning, STS Canada identified theoretically the filtration technology best suited to the filtration of river water. Subsequently, a demonstration on a pilot scale was carried out. During this demonstration, various filter aids, coagulants and flocculants were tested to optimize filtration. The equipment was then sized based on data collected during piloting. Finally, quotes were requested from various manufacturers available.

RESULTS

The intervention of STS Canada has led to identifying the most suitable filtration technology for clarifying the water river. A demonstration of this technology was carried out and made it possible to identify which filtration additives should be used. The sizing of the equipment has also been calculated, which has made it possible, thanks to STS Canada's comprehensive supplier bank, to find the manufacturer offering a competitive commercial offer of the equipment to the customer.