Waste processing - Import export

Application The internal transport of residuals and recyclable fractions, e.g. sievings, screenings and material from grit chambers in waste water treatment plants, as well as various media within production processes, is effected for many years now by belt, spiral and screw conveyors. These systems have proven as very reliable and versatile. As a “connecting element” the PWL GmbH & Co. Anlagentechnik KG supplies the optimal suitable conveyor technology for your specific application. We recommend the encapsulated design of spiral conveyors for process and waste water technology. The spiral conveyors impress with their compact design, the robustness towards clogging and the option to be equipped as a spiral press for simultaneaous dewatering of the conveyed material.

Application The PWL Spiral Sieve HXS presents among the fine screens one of the most efficient solutions for small and medium waste water treatment plants and for some industrial branches. Functional Description In one screening system with one drive only the PWL Spiral Sieve HXS offers three functions. Besides sieving and separation of solids from waste and process water the screenings are conveyed and dewatered at the same time from the screening area for further direct discharge into a container or into a downstream conveyor unit, for example into a PWL Spiral Conveyor. Equipped with either a perforated screening surfaces or wedge wire sieve baskets and installed into tank or channel this Spiral Sieve offers a broad field of applications. The swivelling out mechanism and the transport area which is designed as a conveyor trough with removable covers of the PWL Spiral Sieve provide for easiest maintenance. Your Benefit sieving, transportation, dewatering in one system high...

Application Standard grit trap contents have an organic proportion of 50 to 80 %. Conventional sand washers are able to dewater the grit trap settlings only partially. But, the high organic content and the lack of dry substance bring on unpleasant odour, high weight and, as a consequence, high costs for disposal. With the PWL Sand Washer the organics in the grit trap can be nearly completely washed out. This results into a reduction of mass of up to 80 % and might cause cost savings of up to 90 % when being disposed on a construction waste landfill. This procedure can be applied in industry, as well, to separate valuable materials from waste. Due to the separate discharge of the various fractions they can be further treated, recycled or disposed. Thus, valuable materials can be returned to the production process and waste material be disposed at low costs and correctly sorted. Function The PWL Sand Washer is fed with a sand-water-mixture. The settled sediment mixture is conveyed...

The externally fed TanFlow Drum Screen is characterized by its rugged and simple design, as well as by its small footprint allowing for installations with limited space. The TanFlow is employed where it is necessary to separate larger flows of liquid from solids – irrespective of industrial or municipal applications. Even oily and greasy media can be separated. Function The process or waste water reaches the sieve drum surface via the headbox. First, the liquid runs from the outside of the drum into the inside. Thus, the solids which are larger than the chosen wedgewire opening settle on the surface. Due to the continuous drum rotation they are transported to the scraper where a gentle separation of the solids is effected. The cleaned liquid flows after the separation process once again through the drum, this time from the inside to the outside (backwash) where it finally leaves the machine through an outlet pipe. Installation Examples municipal WWTPs wood...

Application An efficient and reliable fine sieving is essential not only for a comprehensive water recycling but for completely closed water circulations. For these applications, the Drum Filter MDF with mesh sizes between 25 and 2000 µm is the best choice. This filter offers a high capture rate at low operational costs during continuous operation. The choice between different cleaning media is part of the adjustment to the individual site conditions. In addition, different discharge devices and the level controlled drum rotation have to be considered. Function The Drum Filter MDF is a unit made of stainless steel, designed for liquid/solid separation within the field of process and waste water of various industries. From the Drum Filter’s inlet connection the waste water runs off into the filter drum consisting of a steel construction which is covered with a stainless steel wire gauze. The solids settle at the gauze and are transported upwards by the rotating filter drum. The...