Multi-objective Optimization of Coal-Fired Boiler Efficiency and NOx Emission under Different Ecological Environment

Wang, Weiqing

doi:10.1007/978-3-642-27311-7_58

Cited by 4 publications

(1 citation statement)

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“…For boilers' efficiency and NOx problem, the idea of multi-objective optimization problem is very attractive as both NOx and efficiency conflict with each other as maximizing efficiency and minimizing NOx and vice versa is not physically possible. Weiqing 27 utilized least square support vector machine and the non-dominated sorting GA (NSGA)-II jointly to model combustion process of boiler, and a multi-objective optimization problem was formulated to optimize both NOx and efficiency after their modeling. NOx versus efficiency was formulated graphically, and optimal and nonoptimal regions were defined to depict safety limits of NOx and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Boiler dynamic control with optimized nitric oxides and efficiency

Ahmed

Elshafei

Habib

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part I:

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Boiler is a steam generating device that is used to generate electricity and provide heat in process industry and buildings. The generation of steam is carried out by harnessing thermal energy generated via combustion process. The key challenges that are posed in this process are harmful nitric oxide emissions and the energy losses from the total energy contained in the fuel. It is highly required to reduce these losses to improve boiler efficiency; however, when the operational parameters are adjusted to maximize boiler efficiency, the nitric oxide formation is adversely affected, that is, nitric oxide formation also goes up. Moreover, a little change in demand of steam may cause disturbance in all the dynamics of boiler which may go unstable if not controlled properly. All these issues necessitate measures to be taken to optimize boiler efficiency and nitric oxide as well as to regulate operational parameters like drum pressure and drum level all at the same time. In this work, a detailed study has been carried out to investigate how thermal nitric oxide emissions, combustion process and dynamics of boiler interact with each other. In this respect, dynamic models of nitric oxides, efficiency and other operational variables of boiler have been investigated, and these models have been combined to form a joint model of whole boiler system. This model is then utilized to form an efficient control of boiler variables along with trade-off-based optimization between efficiency and thermal nitric oxide emission. The results have been formed using an experimental input data from a typical package boiler to ensure the practicability of the proposed technique.

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Section: Introductionmentioning

confidence: 99%