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Metzingen, Germany

Van Durme R.E.,Lechler Inc. | Seligman G.,Muscatine Power and Water | Freese J.,Muscatine Power and Water | Barg B.,Lechler Gmbh
Air and Waste Management Association - 8th Power Plant Air Pollutant Control Mega Symposium 2010 | Year: 2010

Muscatine Power & Water (MPW) is a city owned 260MW coal-fired utility located in Muscatine, Iowa. MPW and Lechler Inc. teamed up to develop a plan to retrofit their scrubber to address limited operational efficiency of the scrubber and elevated maintenance costs. The plant wanted to increase the SO2 removal of the scrubber and reduce the parasitic loads incurred. One key aspect the plant focused on was the spray nozzle technology used for spraying the lime slurry inside the absorber section of the scrubber. Lechler Inc. utilized dual outlet nozzle technology to help the plant obtain its goals of the retrofit. The paper will discuss previous operational experience prior to the retrofit as well as the operational and maintenance savings after the retrofit was completed. Source


Prikhod'ko I.Y.,Ukrainian Academy of Sciences | Vorobei S.A.,Ukrainian Academy of Sciences | Sergeenko A.A.,Ukrainian Academy of Sciences | Raznosilin V.V.,Ukrainian Academy of Sciences | Shatokhin S.E.,Lechler Gmbh
Steel in Translation | Year: 2011

The main approaches to the automatic regulation of roller cooling are described by means of adaptable mathematical models, and possible subsystems are identified. The basic features of the mathematical models are outlined, along with the system hardware and software for continuous monitoring of the roller's thermal state, automatic regulation of roller cooling, and stabilization of the working-roller temperature in rolling strip of various types. The system is based on modern information technology for the finishing group in the 2000 broad-strip hot-rolling mill at OAO MMK. © 2011 Allerton Press, Inc. Source


Frick J.,Lechler Gmbh
MPT Metallurgical Plant and Technology International | Year: 2014

Hydro-mechanical descaling systems need to be designed in such way that the typically high safety margins resulting in excessive spray overlaps are eliminated. Latest technologies have been applied to new measurements of all the variables that form the basis for the new edition of the DESCALE 7.5 software, which is an indispensable tool for the design of descaling headers. Source


Frick J.W.,Lechler Gmbh
SEAISI Quarterly (South East Asia Iron and Steel Institute) | Year: 2011

As well as the customers in the automotive industry, manufacturers of construction and agricultural machinery using hot rolled steel for outer body parts demand defect free surfaces. The production of oil and gas pipe lines has also set very stringent surface quality standards to the plate mills rolling API steel grades. Existing rolling mills entering into these lucrative markets for high quality steel often struggle to fulfill those quality requirements because of the limitations of the descaling systems installed in terms of pressure and flow rate. In addition to the potential for optimizations of existing systems, the potential for optimization of the nozzle design itself has now been fully utilized in order to maximize the impact at a given water flow and pressure. New design methods and production technologies have been applied. This paper describes the: 1. Nozzle spray characteristics 2. Optimisation of impact measurement technology 3. Design features of conventional descaling nozzles 4. Main new design features of the new descaling nozzle Scalemaster Superior 5. CFD - Computational Fluid Dynamics 6. Reduction of nozzle internal pressure loss 7. Reduction of nozzle internal turbulences 8. Explanation of impact increase of Scalemaster Superior 9. User benefits of the new descaling nozzle Scalemaster Superior 10. Conclusion. Source


Boyle R.,Lechler Ltd. | Frick J.W.,Lechler Gmbh
SEAISI Quarterly (South East Asia Iron and Steel Institute) | Year: 2012

Over the life span of a continuous casting machine the requirements in terms of production output, product quality and the range of steel grades may change significantly. Consistent production of prime quality over the extended steel grade range requires an increased operational and maintenance flexibility which can be missing from existing casters. The secondary cooling system is a key technology area and its modification can greatly contribute to increased production, quality and flexibility. A caster secondary cooling audit is a systematic and structured approach to determine how an existing secondary cooling system, operational practices and process automation data, impact on quality and productivity. The scope of an audit can vary from simply increasing nozzle capacities to a complete redesign of a secondary cooling system. Source

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