RWE‘s patented pelletizing facility enables the production of solid recovered fuel pellets from municipal solid waste without prior separation of materials. The method includes shredding, magnetic separation, drying, and pressing, ultimately allowing the pellets to be used in hydrogen and syngas production through torrefaction. GlobalData’s report on RWE gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on RWE, HEV energy management was a key innovation area identified from patents. RWE's grant share as of June 2024 was 43%. Grant share is based on the ratio of number of grants to total number of patents.

Method for producing fuel pellets from municipal solid waste

Source: United States Patent and Trademark Office (USPTO). Credit: RWE AG

The patent US12042831B2 outlines a method and facility for processing municipal solid waste into solid recovered fuel pellets without the need to sort out chlorine-containing materials. The method involves several steps, starting with shredding the municipal solid waste, followed by the application of a magnetic field to remove ferromagnetic particles. The shredded waste is then dried, with a specific moisture content adjustment, and subjected to eddy current separation to extract non-ferrous metals. Further residues are removed using a density classifier, and the pre-cleaned material is milled before being pressed into fuel pellets. These pellets can subsequently undergo torrefaction at temperatures ranging from 250°C to 300°C.

The facility described in the patent includes a series of interconnected components designed to facilitate this processing method. Key elements include a shredder, metal removal units, a dryer, a density classifier, a mill, and a pellet press, all arranged to allow for a continuous flow of solid waste through the system. Notably, the dryer is specified to be a rotating kiln that utilizes a heat pump for energy recovery, enhancing the efficiency of the drying process. Additionally, the facility incorporates a torrefaction unit for the treatment of the generated pellets, ensuring that the entire process is streamlined and effective in converting municipal solid waste into usable fuel pellets.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.