Why and where it is used? Bag filter is used where the dust products like bed material in power plant, lime powder, cement, big floor mill wastage, etc. powder products used as a output or input material. This bag filter is attached on the upper portion of the bunker of the material. And if we … Read more
Why we required to attend steam leakage in power plant running boiler? / Leakage attending in power plant 1.If in running boiler any tube has leakage, it will increase day by day due to steam velocity friction on the edge of the hole of leakage and it will cause earlier shutdown of the boiler. 2. … Read more
Why do we use trevi test? Trevi test is use for set pressure of safety valve with online while safety valve in service without adding pressure in whole system approaching the set pressure. Trevi test kit use the Hydraulic lift assist device to help pull spindle of safety valve to overcome spring force without increasing … Read more
Here are some Questions and Answers on high pressure boilers MCQs
Mechanical draught (forced draught is subtype of mechanical draught) The draught required in high capacity modern steam power plant may vary form 30 to 350 mm of water in order to maintain flow of large volume of air and gases (4×105 to 8 x105 m3/min). Also, large steam power plant is equipped with economizer and … Read more
Natural draught function The natural draught is obtained by the use of chimney. The chimney in the power plant performs the following two functions. (i) It produces draught (create pressure difference) which required to force air and gases through the furnace, boiler accessories and settings. (ii) It comes the product of combustion to such a … Read more
Boiler Draught / Draft In a boiler the combustion of the fuel requires to supply sufficient amount of air and removal of exhaust gases and this is taken place by draught system. Boiler Draught is defined as “the pressure difference (between absolute gas pressure at any point in a gas flow passage and the atmospheric … Read more
Electrostatic precipitator (ESP) It is an electrical device to precipitate suspended fly ash and dust particles from the flue gas by ionizing the particles in an electric field and collecting them subsequently on oppositely charged electric plates. It was first introduced by Dr. E G. Cottel in 1906 and was first economically used in 1937 … Read more
Why is pulverized coal system used in power plants?What are advantages and disadvantages of pulverized coal system.Explain two stages of coal pulverization system.Compare/Difference between pulverized coal firing and stocker firing. Pulverized Coal System The first commercial application of pulverized coal firing for steam generation was made in the early 1920s. Since then it has become … Read more
Function of air preheater function: The air preheaters are employed to recover the heat from the flue gases and this heat is utilized to increase the temperature of air before it supply to the furnace. An air preheater is placed between the economizer and the chimney and it extracts heat from the flue gases and … Read more