Close loop optimisation of large CHP based on approximation model

Łukasz Śladewski,Maks Sędzielski,Wojciech Bujalski,Krzysztof Możejko,Konrad Świrski,Rafał Wereszczyński,Jerzy Majchrzak,R Laskowski,A Smyk,Ł Szabłowski,S Bielecki

doi:10.1051/e3sconf/201913701051

Abstract

Complex optimization of CHP plants becomes a very important issue in research and implementation, particularly in the context of increasing environmental requirements. The process in industrial CHP plants could be decomposed into several subprocesses, which could be optimized individually using dedicated solutions. The article presents the results of work of complex, multi-modular optimization project of one CHP plant located in petrochemical and refinery plant in Poland. The scope of the project is economical load dispatch optimizer aimed to increase economical profit of CHP operation, combustion optimization for boiler efficiency increase and NOX emission reduction, steam temperature advanced control for improved control quality, sootblowing optimization for reduction of steam demand for sootblowing process. The solution includes also measurement validation and correction system, which is based on data reconciliation algorithm and on-line performance monitoring system.

Highlights

The fossil fuel heat and power generation industry faces nowadays demanding environmental regulations as well as accent on economical profit
From economical profit point of view steam generation boilers and steam turbines are modernized in the way to reduce losses and to improve efficiency of the process
Once either industrial CHPs or municipal CHPs reach a high level of modernization with best available technologies new solutions for better utilization of the plants are applied

Summary

Introduction

The fossil fuel heat and power generation industry faces nowadays demanding environmental regulations as well as accent on economical profit. Both conditions request investments in modernization of exiting plants in terms of low emission and emission reduction technologies like new burners or air staging, flue gas desulfurization and selective catalytic or no-catalytic reduction of NOX emission. In most model based advanced control and optimization software solutions are used. This paper presents solution and implementation results of model based advanced control and optimization in PKN Orlen CHP plant located in refinery and petrochemical plant in Plock, Poland. Design of the solution responds to design of the CHP plant and, in most, conditions of process steam supply. The process in the plat had been decomposed into subprocesses, where a benefit could be achieved, so the solution integrates the economical load dispatch optimizer, combustion optimizer, steam temperature advanced control, sootblowing optimizer, measurement validation and reconciliation system, performance monitoring system

Objectives

Results

Conclusion