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Showing posts with the label Efficiency & performance

10-tips to reduce LOI/unburnt in Boilers

    1- Optimization  of fuel moisture in the fuel: Higher moisture in the fuel leads to unbalanced draft in the furnace or combustion chamber. Which ultimately results into poor mixture of air & fuel, higher moisture fuel demands more excess air. So optimization of fuel moisture will help to reduction in LOI. 2-Maintaining balanced draft in furnace: Unbalanced draft is nothing but more FD air/less ID draft or less FD air /More ID Draft. More FD & less ID causes back fire & improper mixing of air & fuel. More ID & less FD causes escape of fuel particles from furnace without proper combustion 3-Maintaining 3Ts of combustion: 3Ts of combustions are: Temperature, Time & Turbulence Temperature: For proper combustion temperature of the furnace must be sufficient enough to burn the fuel completely. Time: There must be sufficient time for combustion Turbulence: There should be proper turbulence in furnace for proper mixing of air & fuel 4-Incre

Protections & Interlocks in power plants

 Interlocks:   Are the programmed or hardwired control systems to protect systems and improve the operation reliability. Protections: Are the programmed or hardwired control systems to protect the equipments, man power and systems from failure/harm. The interlock and protection system is used to ensure safety of equipment and personnel as well as smooth & trouble free operation of the plant This system initiates automatic corrective actions to stabilize the unit quickly. The protection scheme is developed to trip the equipment automatically with or Class A trip involves a serious electrical fault like differential, stator earth fault etc. and is considered to be the most dangerous in terms of the shock on the unit. Since it involves serious electrical faults, connections from both generator and the HV bus is immediately switched off to limit the damage at the fault point and also to isolate the healthy system. Hence the unit (turbine, generator and boiler) has to be tripped