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Showing posts from August, 2020

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.

33-most frequently asked questions & answers on air compressors

1-What are the functions of air compressors in power plants? The functions of the compressor is to take a definite quantity of fluid (air or gas) & deliver it at a required pressure 2-What are the applications of compressed/pressurized air in power plants? Operating the control valves Operating the solenoid valves Operating the dome valves in ash handling system Air dampers operation in fans Operating pneumatic tools 3-How does air compressor work? & what are the effects of compression on air? An air compressor takes in atmospheric air. Compresses it and delivers this air to a storage vessel from which it will be conveyed by the pipe line to the required equipments. Effects of compression: Air pressure & temperature increases & moisture content in air increases 4-What are the various types of air compressors used in power plants? Generally reciprocating, screw & centrifugal air compressors are used. 5-How does the positive displacement

Questions Answers on basics of instrumentations for Power plant Mechanical Engineers

1. What is an instrumentation? Instrumentation is the art of measuring a value of plant parameters. Or The technology which is used to measure and control the process system of plant is called instrumentation. 2. What is an instrument? An instrument is a device that transforms a physical variable of interest (the measurand) into a form that is suitable for recording (the measurement). 3. What is measurand? A physical quantity, property, or condition being measured. Often, it is referred to as a measured value. 4. What is a sensor? The portion of a measurement system that responds directly to the physical variable being measured. 5. What are the various variables measured in a power plant? Pressure, temperature, force, speed, frequency, current, voltage, resistance, time, displacement, acceleration, light intensity, density, pH, conductivity, flow etc. 6. What is calibration of a sensor? The relationship between the physical measurement variable input and the

Basic Questions & Answers on Slop/Spent wash fired Boilers

1-What do you mean by Slop or Spent wash? Slop or Spent wash also known as Vinasse is an acidic effluent produced in Distillery unit. Slop is formed on fermentation of Sugar cane molasses in distillery. 2-Why do you treat Slop as a Hazardous effluent? Because it is an acidic effluent having pH around 4 to 5 3-What are the standard parameters of Slop or Spent wash? Colour : Brown Odour : Pungent pH : 4 to 5 Solids: 9 to 12% BOD : 45000 to 60000 COD : 110000 to 1350000 HP HEATERS 4-What are the various methods of Slop disposal? Disposal methods: Biomethanation Composting Incineration Technology 5-What is the purpose of using incineration technology for Slop disposal? Incineration technology method leads to Zero Liquid Discharge, where spent wash is concentrated by heating it in specially designed Boilers. 6-What are the benefits of burning Slop in Boilers? TOP-6 BEST POWER PLANT O&M BOOKS Benefits: Zero liquid discharge (ZLD) or Zero eff