Pulp and Paper Mills Rely On Float Switches and Level Sensors

The pulp and paper mill industries use lots of water in their manufacturing processes while generating huge amounts of wastewater in the process. Wastewater recycling is fast becoming a necessity to cut energy costs, reduce clean water usage, improve overall efficiency, and reduce hazardous environmental waste.

Excess water used in the production processes of these paper mills drains into large underground sump pits. The water is collected, treated, and reused. Process water flows into these pits at a high rate and when the pit fills up the wastewater needs to be pumped out for treatment and processing. Liquid level control  in these pits is critical to the treatment process, keeping wastewater from overflowing into work areas that are dangerous and can cause significant damage and downtime.

These integral sump pumps are controlled using float switches. All too often low cost sump pump float switches are chosen that are unable to handle the amount of wastewater these industries generate. The problem is that rushing water into these pits generates a lot of turbulence causing the floats to get tangled and smash on the concrete walls eventually causing them to fail.

Using a rugged vertical multilevel float switch that is constructed out of ridged stainless steel tubing solves this problem. These vertical float switches are bracket mounted to the side of the concrete pit. The floats only move vertically on the shaft. These multilevel floats can have up to five individual float positions not only for pump control but also have liquid level sensors and emergency shut down capabilities. The sensors are made to order and are fully customizable to any size water sump pit.

Using a multilevel float switch instead of a sump pump float in a paper mill and pulp wastewater sump pits can save companies a lot of time, money, and energy, keeping systems up and running.


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