Abstract
The paper presents a method for determination of thermo-flow parameters for steam boilers. This method allows to perform the calculations of the boiler furnace chamber and heat flow rates absorbed by superheater stages. These parameters are important for monitoring the performance of the power unit. Knowledge of these parameters allows determining the degree of the furnace chamber slagging. The calculation can be performed in online mode and use to monitoring of steam boiler. The presented method allows to the operation of steam boiler with high efficiency.
Highlights
The fouling processes caused by slagging and ash deposits are strongly affected by the kind of coal [1,2,3,4,5,6]
In the case of the furnace chamber, the fouling processes are different on its individual walls
The ability of the developed system to monitor thermal and flow parameters, thermal stresses and lifetime of critical pressure components has been shown on example of a steam boiler with natural circulation
Summary
The fouling processes caused by slagging and ash deposits are strongly affected by the kind of coal [1,2,3,4,5,6] They become more intense if coal is co-fired with biomass. If biomass is co-fired, due to the low melting point of ash, intense processes of ash deposit formation and slagging may occur on the superheater stages located in zones with a lower flue gas temperature. It should be noted that about 40% of the boiler failures are caused by damage to boiler superheaters For this reason, there is a need to develop an effective and efficient method of determination of thermo-flow parameters for steam boilers. The presented in this paper method allows to the operation of steam boiler with high efficiency
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