Swb Entsorgung GmbH & Co. KG

For SwB, Huning took the local conditions of the existing waste incinerator plant into special consideration when developing a solution for receiving sewage sludge as a secondary fuel to supplement organic consumer waste as main fuel.  A well-planned arrangement resulted in optimal integration into the existing system. Despite this individual customisation, thanks to the utilisation of proven Huning standard components the total investment costs could be significantly lowered.

The de-watered sludge is delivered to the receiving station with a volume of about 40 cbm by tipper trucks. Three hydraulic sliding frames convey the sludge into two type SP 460 worm conveyors. The container can be closed by a hydraulically actuated cover. The two-piece butterfly design prevents contamination because when the cover is opened, debris falls into the container instead of behind it.

The container is also equipped with a grid for rejecting impurities.

Direct loading into the silo cylinder by a special worm conveying technology facilitates a high filling capacity of about 50 cbm/h and efficient utilisation of the available silo volume.

Construction phase: Installation of SP 300 worm conveyors with trace heating and insulation, including the supporting construction and catwalks, as completely finished modules.

Direct filling of the sludge piling silo through two SP 460 worm conveyors with a capacity of 50 cbm/h results in an optimal utilisation of the available silo capacity and at the same time, yields high availability due to the redundant design.

The piling silo, with a volume of 500 cbm, is discharged through a hydraulic sliding frame. The foundation costs could be substantially reduced by supporting the silo on a great many individual supports. Cladding the substructure gives rise to a natural operation space in which the silo floor heating and the hydraulic unit are housed to protect them from the weather. The fill level in the silo is monitored by radar sensors.

The consistent use of model range SP 300 worm conveyors to fill the silos, and especially to cover the distance from the silo to the wastes bunkers of about 90 m with a height difference of 12 m, enables both reliable transport even of problematic sludge and minimises wear and therefore operating costs as compared to other conveying systems. Costs for auxiliary materials such as lubricant injections for solutions with thick matter pumps which are susceptible to wear simply do not occur.

A spreader developed especially for this application is used to spread the sludge above the wastes bunker.

The entire system is distinguished by high practicality and reliability.

Receiving station for external sludge with 3-way hydraulic sliding frame discharge into an SP 460 worm conveyor combination for filling the piling silo.