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Showing posts from January, 2021

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.

On line water & steam leakage arrester and sealants

  Lucifer Waterproof Rubberized Adhesive Sealant Tape Stop Leaks Seal Sealant Repair Tape 2-Buyyart Polyimide Heat Resistant/High Temperature Adhesive Tape (10mm)                                                 3-RUDRA Waterproof Adhesive Sealant Tape Stop Leaks Seal Repair Tape                                                 ` 4-Online Transformer Oil Leak Sealant                                                           5-THEMISTO - built with passion RT1 Royal Tools Silicon Sealant Gun                                          6-J-B Weld 8281 Professional Size Steel Reinforced Epoxy                                                       7-Blue Magic 16002TRI QuikSteel Steel Reinforced Epoxy Putty Repair                                               

Top-6 best power plant operation and maintenance books

 1. An Introduction to Thermal Power Plant Engineering and Operation: For Power Plant Professionals  Paperback – 27 October 2018 Rs 610  2-Practical Boiler Operation Engineering & Power  Paperback – 25 July 2015 Viva Questions & answers for preparation of BOE exam & interview 3-Industrial Maintenance Process: Mechanical Maintenance  Paperback – 9 March 2020                                  4-Industrial Maintenance Process (Volume II): Electrical, Instrumentation & Control  Paperback – 10 August 2020                                                                5-Practical Approach to Power Plant Operation and Maintenance: Based on Professional Field Experience  Paperback – 28 February 2019                                                                                                            6-Boiler Operation Engineer Exam Question and Answer  Paperback – 1 January 2017                                           

Challenging situations & troubleshooting during Boiler light up & start up

  1-Unavailability of start-up equipments/Competent Man power etc: As we aware after long shutdown or after maintenance activities, we face following common problems Not closing of work permits, Not normalizing equipment like Boiler fans, Fuel feeding system equipments from electrical department No trial of equipments prior to Boiler light up. Solution: Preparation of check lists for pre light up of Boiler Equipments trial & interlock testing Ensuring competent persons for light up activities Factors considered for Boiler design Boiler calculations for Boiler operation engineer (BOE) exam 2-Boiler light up failure: The main reasons for Boiler light up failure are; Improper selection of fuel (coal, bagasse) : High moisture content fuel may lead to late light up or complete failure Foreign materials in fuel may lead to clinker Improper fuel: air mixture can lead to clinker formation Following wrong SOP of light up Not achieving 3T’s of combustion (Temperature. T

Power plant maintenance calculations

  1-A V pulley & Belt system is used for fuel feeding system. One of the pulley of size 6” is mounted on motor shaft & other 8” on gear box shaft. Then calculate the input speed to gear box if motor rated speed is 1450 RPM is transmitted through V belt to 8” pulley. We have, Speed of motor N1 = 1450 RPM Size of drive pulley (fitted on motor shaft) D1 = 6” Size of Non end drive pulley (fitted on Gear box input shaft) D2 = 8” Speed of pulley fitted on Gear box shaft N2 =? We have the formula for calculating the speed of non-drive end side N1 / N2 = D2 /D1 N2 = N1 X D1 / D2 N2 = 1450 X 6 / 8 N2 = 1087.5 RPM Speed of Non end drive end pulley N2 = 1087.5 RPM Note: If drive end pulley is smaller than non-end drive pulley, then non end drive pulley speed is always more than drive end pulley & Vice Versa 2-A gear box input & output speeds are 1475 RPM & 100 RPM respectively, then calculate the gear box reduction ratio We have, Gear box input s