Data Reconciliation for Flowsheets Involving Plug-flow Units.An Application to an Oil Sands Processing Plant
The objective of the paper is to develop a material balance calculation procedure for a production unit involving two plants separated by a pipeline. The case study is taken from the oil sands industry.The raw sands are first mixed with water in a conditioning plant, then transported through a pipeline to an oil extraction plant. The combination of pipeline dimensions and nominal throughput creates a significant variable time lag between the two plants. As usual, mass balance calculations required for the evaluation of plant performance indicators, such as bitumen recovery, are inaccurate due to measurement errors. In addition, in the present case study, the time lag of the pipe creates an additional source of uncertainty, which may lead to misinterpretations and wrong decisions.Raw data are usually reconciled through steady-state mass balancing, to correct for measurement errors. However, because of the significant pipeline dynamic lag, standard steady-state daily mass balance may fail at giving an appropriate picture of the operations. The proposed solution to the data reconciliation problem includes the use of a pipeline plug-flow model in the mass balance calculation. To fulfil the industrial constraint that current data reconciliation must not modify past reconciled values, while still satisfying dynamic constraints, a daily one-step method, i.e. a unitary filtering horizon, is recommended. The method is illustrated with simulation data, and the results compared to those of standard data reconciliation methods.
Data reconciliation Mass balance Oil sands
L. Lachance D. Hodouin A. Desbiens E. Poulin
Algosys Inc., Québec, Canada Department of Mining, Metallurgical and Materials Engineering, LOOP (Laboratoire dobservation et d Department of Electrical and Computer Engineering, LOOP (Laboratoire dobservation et doptimisation
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
2322-2330
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）