Slurry technology - from the rotary lobe pump to the ExaCut precision distributor
Efficient slurry spreading and slurry management
Applications in modern agriculture
For more efficient spreading of slurry, generally it first needs to be pumped from a deep sump into a tanker or into another container on the yard. Farmers and corporate contractors require efficient pumping technology for this that is geared precisely to their requirements. At the same time questions like "How do I best pump slurry?", "How can I pump large quantities in a short time?" or "Which pump is suitable for mobile use?“ play an important role here.
Rotary lobe pumps - the basis of spreading technology
Rotary lobe pumps have become an essential slurry technology due to their fundamental characteristics and are the basis of spreading technology. As the inventor of this technology, Vogelsang is further optimising its various pump series on an ongoing basis to ensure our products meet the daily requirements of our customers.
Vogelsang pumps are self-priming up to a depth of nine metres so that slurry can also be pumped out of deep sumps to a container or tanker. Together with their high performance, they make the tanker filling process simple and fast.
The pump process can be performed using a stationary solution with a slurry pump installed on a fixed-position or three-point stand, or else at the tank. There are three drive options (mechanical, electrical, hydraulic) from which each farmer can select.
Use of the slurry pump at the tanker
Rotary lobe pumps for tankers being self-priming and high-performance does not suffice alone however. Being compact, having no dependency on direction of rotation, and resistance to foreign matter are additional key features that make rotary lobe pumps the optimal solution. The compactness and low dead weight of the Vogelsang slurry pump enables a greater useful load at the tanker, while at the same time filling the tank more quickly and fully. In this way, storage capacities are utilised optimally and transport is as efficient as possible. Vacuum systems arrive at their physical limitations very quickly e.g. due to formation of foam in the tanker. In addition, rotary lobe pumps can fill tanks up to 30 percent quicker than other pumps.
The filling technique at the tanker can also be used for draining. The rotary lobe pump spreads the slurry constantly and evenly, regardless of the liquid or pressure level in the tank. This is a basic prerequisite in order to use slurry as a natural and organic fertiliser. Simple and fast servicing of the pump is also important to ensure downtimes are kept as short and rare as possible. Our QuickService concept means Vogelsang slurry pumps can be repaired without dismounting and have a high maintainability.
Additional filling options
Support of the vacuum tank with filling aids
A further variant for tank filling is the vacuum system. When filling with a vacuum pump, the basic problem is foam formation. The filling process also requires more time than other techniques. But an auxiliary filling aid will enable you to lessen both disadvantages of this technique. The Vogelsang PowerFill enables this power at a significantly lower speed due to its generously sized housing, ensuring less formation of foam overall with significantly faster filling. The PowerFill can be inserted both on the suction and the discharge side and can be retrofitted easily using a flange connection.
Stationary and mobile filling stations
Use of tank filling stations is one option for stationary tanking, for example with tanks or terminal storage on a biogas plant. These remove the need for inconvenient, time-consuming coupling and decoupling of hoses since they are equipped with a dome including a filling nozzle enabling the tank to be filled quickly via the dome. There are also mobile filling stations for comfortable and rapid filling on the border of the field. Vogelsang offers two options for filling tanks quickly and conveniently with the FillMaster S for stationary tanking and the FillMaster M for mobile tanking.
Shredding technology is often required to protect pumps from foreign matter and heavy material. This can be carried out either as a stationary technique or at the tanker. The primary goal here is to prevent clogging, blockages and damage due to fibrous matter or foreign matter which can often be found in slurry. This might be stones, hoof blocks or earmarks for example.
Use of shredding technology has another key advantage however. The more flowable and homogeneous the slurry is, the more effectively it can be used as organic fertiliser. Particularly on tankers, the use of such technology ensures homogeneous but also easily doseable slurry suspension.
As a partner for agriculture, Vogelsang also offers tailor-made solutions in this area for relevant customer problems. For example, the RotaCut macerator can be installed as a stationary technology on the yard or in the form of the RotaCut MXL as a mobile solution at the tankers to reliably cut fibres and separate foreign matter. Users can rest assured that their pump and downstream systems will be protected. Integration of a macerator has a positive effect on time management and reduces operating costs due to less servicing of the slurry pump and the spreading technology. The generously-sized opening is also very maintainable.
The key factor of efficient slurry management is precise spreading to ensure optimal utilisation of the natural nutrients. The basis here is a homogeneous suspension and a filling system for the tanker that also ensures constant spreading. At the same time the spreading technique itself must be precise, exact and above all, clean. This is the only way to be sure nutrients are spread uniformly.
Wide spreading – the technique of the past
It is well documented that the wide spreading method results in very little spreading accuracy. For this reason, it is widely known as "the spreading system of the past". It is wind-sensitive and disperses the nutrients onto the leaves of crops and not on the soil where the nutrients are required. Another key factor is its poor average distribution.
Precise slurry spreading with precision distributors
The hydraulically powered precision distributor is at the centre of strip-based spreading technology, a basic prerequisite to precise and reliable spreading to each individual flow. At the same time, fibrous matter and foreign objects are reliably cut by the cutting blades. Vogelsang can offer four different variations here: the DosiMat DMX, the ExaCut ECL, ExaCut ETX or the ExaCut ECQ. We can therefore offer you the optimal solution for all requirements and spreading application areas. Examples of application areas are dribble bar systems, trailing shoe systems, cultivators, disc harrows and slit devices. In summary, the Vogelsang precision distributor is ideal for all spreading techniques.
Low-emission spreading with the dribble bar system
The dribble bar system ensures low-level, virtually odourless spreading. This technique is the future of spreading and will remain so too because it:
- Guarantees low levels of nutrient losses without contaminating crops
- Is resistant to wind and
- Is environmentally friendly
Vogelsang builds dribble bar systems for all drawn and self-propelled vehicles regardless of manufacturer, capacity, type of tyres, materials and pump systems up to a working width of 36 metres.
The trailing shoe system for nutrient efficient slurry spreading
As a further slurry technique variant, the trailing shoe system is an optimal solution for pasture land. The crops are parted using a trailing shoe so that the slurry can be spread directly beneath them. The result is even more efficient spreading in existing grass and crops, while at the same time ensuring compliance with requirements of many subsidy programmes. With the SwingUp Slide and SwingMax Slide Vogelsang offers two trailing shoe systems with working widths of up to 30 metres. This achieves a level of effectiveness never before seen in trailing shoe technology.
Whole area or strip-based - slurry is introduced directly into the soil
To be able to optimally utilise nutrients in the slurry, it is important to keep emissions as low as possible. If the slurry is introduced directly, these nutrient losses, which occur due to evaporation, are prevented. This is the best solution for arable land for optimal use of nutrients. It also saves you time and money, and reduces the number of passes across the field. Direct introduction of slurry is enabled with our SynCult - equipment set for cultivators and short harrows. For area-based introduction, the SynCult offers a professional solution for simple and quick equipping of a tillage device. Alongside our previous partners Amazone, Väderstad, Köckerling, Horsch, Pöttinger and Farmet we can also offer individual kits for upgrading devices of other manufacturers too.
The Strip Tillage method offers a further option for direct introduction of slurry with its optional slurry underfoot fertilisation. For decades, this method has proven highly successful in dry regions or areas that suffer from drought or erosion problems, as it combines the benefits of no-till and conventional soil cultivation systems. The soil is worked in strips while at the same time the slurry is deposited under foot, enabling several processes to be completed efficiently in one single work step. Using this method, nutrients are placed exactly where plants need them, around the roots. Two different series are available with the Vogelsang XTill: the robust XTill ProTerra has a fixed row width of 70 or 75 cm while the XTill VarioCrop can be used with any crops, since row spacing can be freely adjusted from 45 to 75 cm.