Download - Nivelco Process Control Co., Inc.

Concrete manufacturing plant for Ekocem (Poland)EchoTREK transmitters help to optimizeoperations at a concrete manufacturingplantMeasurement of sand, cement and different sized gravelis performed in 10 m tall silos in extremely dusty environments.Stones are loaded directly into the silos, producingquite high acoustic noise and strong vibrations. All deliveredinstruments work reliably and provide credible sourcesof information about level in the silos.One of our prospective customers asked for a quotationfor replacing an out-of-date level metering system(produced by one of our competitors) for controlling thelevel of sand, cement and different types of gravel in segmentedsilos. In addition to this, the system has to ensuresafety with a fail-safe high level indication, even in thecase of a failure of the level measurement. Experts fromNIVELCO-Poland proposed the well known ultrasoniclevel meters for solids, the EasyTREK SCD-340-4 typewith HART communication. Additional elements of thesystem included a MultiCONT process controller unitexpanded with UNICONT PJK universal interface modulesfor control of filling and emptying the chambers of the siloas well as to generate a high level alarm.The operational processes became more fluent andthe control process for filling and emptying becamefail-safe with the overfill protection added by the additionalEasyTREK SCD. In a very important benefit for theworking environment, the system helps to improveworking conditions, the safety at work, and the health ofemployees, previously exposed to extreme dusty and unhealthyconditions.All instruments work in HART Multidrop loops, whichallows remarkable cost-savings on the installation. Duringthe mounting of the instruments the proper location hadto be considered carefully, especially for the high levelalarm sensor, because the mounting console is above thefilling apparatus. All of the control and alarm signals wereintegrated with the existing control system on the plant.Mechanical and electrical installation was done by theNIVELCO-Poland team, in addition to commissioning,configuration and optimization of the instrument settings.The whole system operates flawlessly, since it has beenbrought into use for the great satisfaction of the customer.Darius PiszerCEONIVELCO Polanddpiszer@nivelco.com32