Archive for the ‘Dewatering’ Category

What To Consider When Selecting a Filter-Press Pump

Friday, February 2nd, 2018 von admin

Fig. 1 A typical chamber filter press being fed by a Almatec high-pressure air-operated double-diaphragm (AODD) pump

Technical paper by Peter Schüten:

High-Pressure Air-Operated Double-Diaphragm (AODD) Pumps Deliver The Operational Advantages Necessary For Optimized Operation Of Chamber Filter Presses.

In many industrial processes that feature the handling of liquids, the substances that are being transferred may occur in an aqueous or “muddy” state, with the liquid portion needing to be removed. This liquid-removal stage may take place during the production process – for example, in the filtration of edible oils or yeast solutions – but it more frequently occurs at the end of a process like wastewater treatment when the waste sludge that has formed must be withdrawn. Since the disposal of such sludges is calculated based on weight and volume, their thickening and drying is particularly lucrative for the processor. During the thickening and drying process, the sludges are treated using chemicals and/or physical processes so that the waste sludge forms into flake-like solids. After adjusting the pH level to neutral or alkaline via the use of milk of lime, the subsequent dewatering process separates the water for disposal, with the remaining volume of sludge significantly reduced.

The simplest technology for this process involves collection and thickening of the sludge through the use of gravity. However, it is significantly more effective to use technical drying methods via processes such as centrifuges and evaporators, or more commonly, chamber filter presses (Fig. 1).


New inline single stage centrifugal pump range

Monday, December 18th, 2017 von admin

The new SIL pump range was developed by Sulzer to meet the process requirements in various general and industrial applications. The SIL pump range is developed for pumping mainly clean and slightly contaminated liquids, viscous liquids up to 250 cSt, and fibrous slurries up to a consistency of 1%. The hydraulic design ensures efficient pumping with a low NPSHr (net positive suction head required) across the whole pump range.

The inline design together with the monoblock construction makes the SIL pump compact, rigid and reliable. The pump is available either with an integrated motor or with a standard IEC motor. SIL pumps are easy and fast to install both in vertical and in horizontal positions, and they require only a small installation space.


KSB: New efficient high-pressure pump

Tuesday, June 21st, 2016 von admin

KSB_Movitec_125_02The new Movitec 125 pumps are complementing the current KSB range of vertical high-pressure pumps. These multistage centrifugal pumps are designed for fluids such as

  • water,
  • coolants,
  • condensate and
  • mineral oils.

They are ideal for industrial recirculation and fire-fighting systems, cooling water circuits and washing plants as well as for boosting pressure in general process applications, for example.


Kirloskar: New wastewater pump series

Thursday, February 5th, 2015 von admin

i-NS PumpKBL’s (Kirloskar Brothers Limited) new “i-NS” pump is a non-clog sewage submersible pump designed for dewatering function in the

  • water & wastewater treatment industries,
  • sewage,
  • building & construction and
  • other allied segments.

The compact size of the pump helps in minimizing submergence, and it comes with an aesthetically-improved design for maintenance-free work.

BBA: Environmentally friendly high flow pump unit

Monday, February 2nd, 2015 von admin

BA-C500 Boskalis  (2)Boskalis Technical Service Nederland manages several mobile pump units with high and ultra high flows. Boskalis clearly prefers environmentally friendly equipment and has very specific requirements from their pumps which include;

  • The pump must have a minimum capacity of 5000 m³/hr and a pressure in excess of 3 bar;
  • Excellent suction capabilities (NPSHr curve) and suitable for use as a dewatering pump;
  • High fuel efficiency combined with the lowest exhaust emissions;
  • The pump unit should fit into a 20 ft. container for easy transport;
  • The maximum weight should be no more than 12,000 kilograms.