What issues should be considered when mixing petroleum coke into coal-fired CFB boilers?
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For a 410t/h CFB boiler that was designed as a coal-fired boiler, it is now intended to mix petroleum coke with coal, up to a maximum ratio of 50%. What issues need to be considered in terms of boiler operation and equipment management?
Don’t you know the components of petroleum coke? Let’s start with some experience-based insights: when petroleum coke is used in 410 t/h CFB coal-fired boilers, at a maximum ratio of 50%, issues such as incomplete chemical combustion and weak fluidization may arise during boiler operation. If the petroleum coke has a high sulfur content, desulfurization problems will also occur. So a benefit analysis needs to be conducted.
Main considerations: 1. Corrosion issue, as petroleum coke has a high sulfur content； 2. The issue of combustion residence time: it is determined based on the particle size whether there is sufficient time for complete combustion.