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Showing posts with the label Efficiency & performance

Chain conveyor troubleshoot guide

  Problem Identification & Corrective Action Sl No. Problem Potential Cause Solution 1 Chain rises off from sprocket 1.Excess chain slack. 2.Excess wear at the bases of sprocket teeth. 3.Excess chain extension. 4.Foreign material stuck to the bases of sprocket teeth. 5.Reverse rotation of conveyor 6.Uneven chain tightening of chain 1.Adjust the amount of slack equally at both sides. 2.Carryout hard facing of the sprockets 3.Replace the elongated chain parts. 4.Remove the foreign material from the bases of the teeth. 5.Avoid reverse rotation of the conveyor when chain tightened is uneven 2 Chain separates poorly from the sprocket. 1.Sprocket misalignment. 2.Excess chain slack. 3.Excess wear at the bases of sprocket teeth. 4.Uneven chain tightening of chain 1-Adjust alignment. 2-Adjust the amount of slack.

Power plant and calculations

1- Powerplants thumb rules 2- Energy conservation in power plant 3-Calculation of PG cost in power plant 4-Steam condenser & vacuum 5-Boiler feed pumps QnA 6-Turbine practical questions & Answers 7-50-QnA on bearings 8- Power plant equipments efficiency calculations 9-Best practices to reduce power plant Auxiliary power consumption 10-Boiler safety valves QnA 11-QnA on fuel handling /belt conveyors 12-Reasons for machine vibrations 13-Thermal expansion in Boilers 14-30-things you must know about steam Turbines 15-QnA on power plant maintenance 16- 22-Questions & Answers on Boiler troubleshooting 17- HP dosing system capacity calculations 18-WTP thumb rules 19-WTP QnA 20- Power plant equipments safe preservation methods 21- Fundamental about nut bolts 22- QnA on rigging technology 23- Power generation calculations in steam turbine 24-QnA on spent wash Boilers 25-Questions & Answers on air compressors 26-Know about Valves 27- QnA on batteries 28- IBR forms, acts & Reg

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