Cellwood Machinery AB products

Grubbens centrifugal pumps are specially designed for transportation of liquids with variable consistency, or liquids containing air bubbles and lumps. Stock concentration up to 8% can be pumped without in-feed pressure. With in-feed pressure it can even manage to pump up to 12%. It has a strength and stability which makes it suitable for a wide range of applications. Acting as an impeller you will find our conical-concave rotor, which gives the pump a high hydraulic efficiency and a problem free pulp transportation. The self-ventilating rotor has no constrictions and therefore minimises the risk of blocking. The pump has a direct drive and capacity is controlled by the pump speed.

As we want you to be sure of the performance of our Microfilters on your water treatment application, you can try out the ALGAS Microfilter Concept in your own mill. Most of our customers have found the best way to evaluate the efficiency and advantages of our Concept is to actually operate a Test Filter on their own «Live Water» treatment application.. With the quick and easy temporary installation of one of our Test Units, results can be directly related to the expected performance of a full size Microfilter, giving a direct relation to both the capacity and filtate clarity. This enables us to guarantee the size and performance of the correct size of unit for your application especially as the Test Filter we use is our smallest production Microfilter, nor a pilot unit.

As the most advanced system the HDS produces the best dispersing results. It is also the most flexible system, with optional features such as in-line bleaching. The key feature of hot dispersing is treatment with high temperature at high pulp consistency. This leads to many advantages: improvement of fiber properties, reduction of bacteria, and softening of dirt and tacky contaminants for a more efficient dispersing. Retention time is 2 minutes at a temperature of up to 120°C (248°F). The system is further described below – with all the treatment steps for dewatering, heating, dispersing and bleaching.

The CDS is the only non-pressurized system. This principle allows for a more compact design: a conveyor can be used to replace both the plug screw and the shredder, and there is no need for pressure vessels or sealings for HC discharge. The non-pressurized concept gives a low steam consumption, and the design also allows for existing dewatering equipment to be used. Retention time is 20-30 seconds at a temperature of up to 95°C (203°F). The system is further described below – with treatment steps for dewatering, heating and dispersing.

The UCD system consists of only three machines: screw press, infeeder/steamheater, and disperser. This solution offers the most compact design possible, something that saves both plant space and investment cost. Retention time is 5–10 seconds at a temperature of up to 110°C (230°F). The system is further described below – with treatment steps for dewatering, heating and dispersing.

The horizontal pulper design allows for a lower build height as well as a lower energy consumption. It can be customized with any of the rotor units described below.

The G-rotor is used for pulp with low dry content, for example in UTM positions such as couch- and press pulpers.

The Algas microfilter can be described as a drum filter with special features. Filtering from the inside and out allows the recovery trough to be installed on the inside of the drum. This means the filter operates with a much higher level compared to conventional designs, increasing filtration time and improving efficiency.

The reject separator is used for removal of plastics and metals from pre-treated substrate. The substrate is pumped through a Ø6 mm screen where the reject is separated from the organic material.

The high density cleaner is used for removal of grit from biogas substrate. Incoming organic waste includes particles from sand and glass which remain as contaminants in the processed substrate. The high density cleaner uses the vortex principle to continuously remove those particles.