Presona Pre-Press Balers for baling of RDF and SRF

Presona AB is one of the world's leading designers and manufacturers of balers, all featuring pre-press technology for efficient baling of a wide variety of recyclables, from paper and plastic to household and industrial waste. The product range also includes pneumatic waste extraction systems for the graphics industry, paper and packaging manufacturers as well as sorting plants for municipal waste. The LP Series balers are all equipped with our pre-press system, a baling technology developed by Presona in the 1960s. The development of the LP Series has focused on energy efficiency, reliability and user friendliness. We have more than 10 years experience of baling RDF and SRF. Already in 2001 we launched our first baler with a tying system using combustibe tying material. We have since then supplied balers for RDF baling, both to waste to energy installations and to the cement industry. The Presona balers are very well suited for baling RDF, SRF and MSW thanks to the pre-press system which means that no shearing of the material is required. In principle all of the press force is utilised for the compaction process itself so no power is wasted in the shearing operation. Presona offers a proven strapping technology using PP (polypropylene) strings to eliminate "contamination" of the baled material through steel wire. To remove the wire before incineration will cost both money and effort. The square bale format produced by Presona balers gives the best handling characteristics. The bales are dense and can be stacked in many layers while maintaining bale shape and also provide the best possible load weights in containers. www.presona.com Achieving compliance the Doosan Lentjes way Doosan Lentjes' range of proprietary technologies for the WtE sector is winning fans across Europe, not least due to the value it offers plant operators in terms of achieving regulatory compliance and more sustainable energy production. This year, the company signed a contract for the engineering, procurement and delivery of the grate and boiler for a new facility in Krakow, Poland, as a key subcontractor to the Korean EPC contractor, POSCO E&C. Once complete, the plant will utilise Doosan Lentjes' proven air-cooled reciprocating grate and boiler technology across two incineration lines, processing up to 220,000 tonnes of municipal solid waste per year - waste that could otherwise have gone tolandfill. Doosan Lentjes' 'chute-to-stack' waste-to-energy solutions provide an effective route to IED compliance, reducing reliance on fossil fuels such as coal, petroleum and gas. It is also largely CO2 neutral, with more than 60% of the waste-borne energy coming from renewable resources, and it helps minimise harmful methane emissions by reducing the need for landfill. Moreover, Doosan Lentjes' flue gas cleaning technologies, including dry or wet scrubbing, selective non-catalytic reduction and adsorption, allow operators to achieve reliable compliance with all applicable international emission regulations. www.doosanlentjes.com Komptech At a facility in Puconci, Slovenia a Komptech Rasor finely shreds residual waste from 100,000 households in to make a high quality waste-derived fuel. The RASOR is a post-shredder for the production of refuse derived fuels from pre-treated waste fractions. It features a continuous material feed using one or more feed screws which ensures uniform power consumption. The rotor turns at 8 metres per second, cutting film, paper, cardboard and textiles into blowable pieces or around 30mm. These are blown via a 100 metre long feed into a cement kiln, where it is combusted at 1600°C. Fuel made by the Rasor is in high demand for the rotary kilns of cement plants. The first largescale RDF processing operations were set up in Central Europe in 2005, and since then RDF has become a commodity that is in demand internationally. EU regulations no longer limit the export and import of this material, since it is used as a fuel without leaving slag. www.komptech.com High efficient waste conversion With Hitachi Zosen Inova Global fact: communities who reached a higher level of sustainability in waste management invested in both, material recycling and waste to energy. When cutting waste sent to landfill, the question arises which technology to use: grate technology or gasification? And howl these technologies should be evaluated? The two technologies are in a completely different status of development, which for some analysts is reason to favour one technology over the other. Combustion of waste has a long history with constant improvements along the way. It is the de facto world standard in waste to energy. However, probably due to its long history, some people consider it outdated. Gasification of waste has been under development for decades, and the technology attracts parties who are interested in new developments. Companies seeking to protect their return on investment opt for grate technology while others feel attracted by the promises of gasification. The incineration process of a grate based system consists in principle of a gasification process in the waste bed and oxidation of the syngas directly in the same chamber. Most gasification plants do the same with the syn- or pyrolysis gas they produce - they burn it. Advanced waste conversion on grate reaches a net electrical efficiency close to 30%. HZI has built the Riverside WtE facility in London, which exports 28% of the energy input in the form of electricity to the grid. Newer plants are designed for a net efficiency of 30%. Such high values have not yet been seen from waste gasification plants. Grate based systems accept all kind of municipal waste which is not suitable for recycling. Some gasification plants claim that they use waste as a fuel but limit their input to selected fractions. Regarding affordability, the evaluation is in open competition. The market will make its choice as long as it is not distorted by subsidies for one technology or the other. Policies to stimulate higher efficiency are very welcome as long as they do not limit the choice in technology. There are some major gasification plants under construction and many advanced grate combustion plants as well. It will be of high interest to compare the technologies on the results of their newest plants in terms of net efficiency, accepted waste quality and affordability. The future will tell. www.hz-inova.com Dry discharge of bottom ash - High metal recovery Residual municipal solid waste (MSW) contains not only a substantial amount of energy, but also reusable materials like metals (iron, non-ferrous (e.g. Al, Cu), precious (e.g. Ag, Au), rare earth) and minerals. Thus modern WtE plants are gaining another focus, besides hygienisation, volume/mass reduction and recovery of energy: more efficient separation of metals from the main residue after incineration, the bottom ash. Bottom ash, which is about 20-25% of the waste put into a WtE plant, is usually taken out via a wet discharge system. In this case, the separation efficiency for metals and their quality is limited. Martin GmbH has successfully designed and tested a dry bottom ash discharge system which has been retrofitted at the two lines of a WtE plant in Monthey where it has operated continuously for over three years. Various projects are currently under discussion. Dry discharge of bottom ash with metal separation conserves resources. www.martingmbh.de Nippon Steel - Leading the Way for Waste Gasification NIPPON STEEL & SUMIKIN ENGINEERING is a leading waste gasification technology company. The gasification and melting technology the so called "Direct Melting System", originated from steel making technology and has been developed and utilised for 42 facilities in Japan and South Korea. The capacity ranges from 10,000 t/a to 230,000 t/a with the world's largest operating experiences since 1979. This gasification and melting technology consists of a waste charging system, a gasifier, a combustion chamber, a boiler and a flue gas cleaning system. Waste is charged into the gasifier with no pretreatment with coke and limestone. Waste is gradually dried and preheated in the upper section of the gasifier. Combustible waste is thermally decomposed and syngas is discharged from the top. The syngas is transferred to the combustion chamber located downstream of the gasifier and completely burned. Incombustible waste descends to the bottom and is melted. Molten materials are intermittently discharged, quenched with water and magnetically separated into slag and metal. Power is generated by a steam turbine system. Material and energy recovery via this technology can contribute to a recycling society.www.nssmc.com Alternative Thermal Technology from JFE Engineering Another option of thermal technology is 'gasification'. Because of a demand for higher energy efficiency and programs like ROC (Renewables Obligation Certificates) in the UK providing support to advanced technologies, waste gasification is attracting considerable attentions these days. In Japan, waste gasification technology has already been widely implemented. One of the reasons for its success was counteraction against the severe problem of DXNs emission from waste incineration plants. Besides, melting of incineration residues is required in order to utilise the residues in Japan; consequently, JFE high temperature gasifying and direct melting system has achieved stable commercial operations in 10 plants in Japan for more than a decade. JFE's gasifying and melting system achieves high level WtE solution through successful proven gasification technology. www.jfe-eng.co.jp