The Tough get Going: An Overview of Pumps for Sludge Drying and Thickening Applications

Related Vendors

Lutz Pumpen GmbH

Glatt Ingenieurtechnik GmbH

TRM Filter d.o.o.

DeanHouston Inc

ALMATEC Maschinenbau GmbH

Pumps for Extreme Demands

By comparison, it is much easier to use an air-operated double-diaphragm (AODD) pump which is resistant to dry running, virtually maintenance-free, self-priming, self-regulating and highly compact. Without the control or intervention of an operator or electronic system, the counter-pressure of the chamber filter press regulates the feed rate automatically.

The feed rate decreases continuously as counter-pressure increases simultaneously to the degree of filling. This effect can be used to detect when the chamber filter press is full. When this is reached, the pump virtually stops — zero feed rate — or only occasionally makes a delivery stroke. In addition, the use of compressed air to move the diaphragms results in a highly efficient, regular and gentle cyclic drive that allows the medium to be fed smoothly.

Using compressed air to power a pump is very effective thanks to constructive measures. As the pump operates with minimal dead space, it has sufficient power reserves to handle large volumes of wastewater.

Single-Use Systems

How to Profit from a Single-Use Mixing System for Biopharmaceutical Production

Enter a New Generation

With the introduction of a new generation of high-pressure AODD pumps, there is now an additional variant that combines the highly robust housing of the pressure-converting pump with an air section where no conversion takes place. This version is therefore suitable for all applications under heavy load conditions, ranging from low-feed pressures to high-pressure applications of up to 15 bar (218 psig).

If the user operates a pump at such high air pressure — whether it is from an external booster or directly from the compressor — they can do so secure in the knowledge that the pump is structurally designed for such pressure ranges and need not be held together by external reinforcements.

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