The client [k]nord GmbH, headquartered in Ganderkesee (Lower Saxony, Germany), has over 35 years of experience as a specialist in the development and implementation of innovative waste disposal technologies. Their services and products ensure sustainable environmental protection. The range of activities includes waste disposal and environmental engineering, noise protection, and logistics.
Task
The client [k]nord GmbH, headquartered in Ganderkesee (Lower Saxony, Germany), has over 35 years of experience as a specialist in the development and implementation of innovative waste disposal technologies. Their services and products ensure sustainable environmental protection. The range of activities includes waste disposal and environmental engineering, noise protection, and logistics.
Next to the composting plant, a new disposal plant for mineral and partially organic drilling slurry has been built. The drilling slurry, with a solid content of 15-20%, is brought to the plant in tank trucks and pumped through a screening system into 8 storage basins equipped with agitators. Each batch is analyzed in the laboratory to determine the optimal conditioning method for achieving the best filter cake.
Solution
Dewatering with ABEL pumps and membrane filter presses
In a 24/7 operation, 4 membrane filter presses are fed with 8 ABEL type CM-G-C262 compact diaphragm pumps, each delivering a flow rate of 10 m³/h. Before using ABEL CM pumps, [k]nord GmbH tested a different type of pump with a compressed air drive, which had excessively high energy consumption. ABEL CM pumps fill the filter presses with abrasive slurries quickly and reliably. When the pressure reaches approximately 8-9 bar, the membrane filter presses take over and continue dewatering until the pressure reaches approximately 13 bar.
The filling time and the pressing time take approx. 1 hour each. Consequently, after 2 hours, the filter cake has reached a solid content of up to 80% and can be dumped into the container standing below the filter press. The weight of the filter cake amounts to approx. 2.7 t per batch. To reduce the filling time, 2 pumps are now sometimes used to pump to a filter press.
[k]nord GmbH is highly satisfied with the operation of the plant – it runs 24/7, entirely automatically and it is monitored with several cameras. Operating parameters can be both controlled and monitored directly on-site and via an app installed on a mobile phone. This minimizes costly downtime.
The use of ABEL CM pumps has quickly shown that the overall energy consumption of the plant was very low. According to [k]nord GmbH, 20.000 t of sludge were processed in 2020 with an electricity consumption of 22.000 kWh, which means only 1.1 kWh/t! In 2023, a further reduction to below 1 kWh/t was achieved, which has saved enormous costs in view of the increase in energy prices.
Technic
Technical Data to the used Pumps:
- Manufacturer: ABEL
- Pump Type: CM-G-C262 compact diaphragm pumps
- Number of Pumps: 8
- Flow Rate: 10 m³/h per pump
- Operation Pressure: Initial pressure of 8-9 bar, final pressure of 13 bar
- Filter Cake Solid Content: up to 80%
The ABEL piston diaphragm pump is a crucial component for filter press feed. The advantages over other pump types are represented by:
- a high wear resistance
- a high robustness
- very long maintenance intervals
- a low energy consumption, which allows operating expenses of clients to be reduced
Does this pump seems to be the right solution also for your application?
You are welcome to discuss the detail now & non-binging with ABEL.
Contact manufacturer
You are welcome to discuss the detail now & non-binging with ABEL.
Source & Pictures: ABEL
