 Myself, Professor, S.P. Mankhani, Assistant Professor, Department of Mechanical Engineering, Walsh and Institute of Technology, Solapur. So today we are going to discuss the Laumont boiler working. So at the end of this lecture, students will be able to understand the working of Laumont boiler. So just you can observe this diagram. So here this one has a Laumont boiler, the construction parts. So now here in this one as so this is the burning portion is going to be taken place that the firing is going to take place in this one we are going to burn the fuel. So here there is a 1, 2 and this is 3 and this is a 4 and then it is going to be the exhaust. The fuel burning whatever it takes place in this particularly the chamber, okay. Here it is represented as a radiant evaporator and this one as the combustion sorry this one as the convective evaporator and then this is a super heater region and this is economizer then it goes to the air preheater, okay. So just I will discuss in the initial stage as how exactly the working is going to be taken place. So here in this particular part, so now this is the blower is given on the right side of the figure here the air is going to be sucked from the atmosphere, air is going to sucked from the atmosphere. So then it comes to this particularly blower it is going to pass through this particular pipeline. So this is the last stage of this boiler as the final part of the heat energy we are going to be extracting, final part of the heat energy which is going to the atmosphere as a waste. So that energy is going to be utilized that is the reason we are going to call this as a air preheater. So here the before utilizing the air because the air is required in the huge quantity suddenly that suppose we are going to pass the normal air from the atmosphere to the chamber the fuel this one the burning portion. So there it is going to cool the fuel to avoid that one we are going to heating the air in before sending it to the burning portion. So here just you can observe it the fins are provided over these pipes. So there is a transfer of heat energy is going to taking place very smoothly from the final part of the heat energy through the flue gases. The hot air which is coming out from this particular portion hot air you are going to pass it to the combustion chamber. So the hot air if you are going to supply to the combustion chamber. So the fuel is not going to lose its temperature. So it gives the additional this one burning process smoothly. The oxygen is going to supply through this one as at a heated condition it is at a higher temperature okay this is the first part. So then coming to this one as so here so the water from the hot well is going to be taken through this particularly the pump the feed pump. The important thing here you are just to observe here so this is the feed pump we are going to use it to pass the water inside the boiler through economizer okay just this is the below the air preheater. So means still there is a higher temperature is available in the in this particular portion from the combustion chamber. So in this particular the energy is going to be utilized energy available energy is going to be utilized for heating of this particular feed water. So that final this one the energy we are going to be utilizing it to heat the inlet water. So then the hot water we are going to be sending to this particularly as the drum. So here this water as well as the steam is available in this one the steam separating drum we are going to call this one as steam separating drum. So in this particularly the whatever the hot water is coming so it is going to be storing in this steam separating drum and that water is going to be taken through this particular the circulating pump. So this circulating pump is coupled to the turbine so that it is going to be utilizing the energy from the turbine. So then this pump is going to send the water to the radiant evaporator it is going to send the water to the radiant evaporator. So here it is the this particularly as the distributing so in this particular distributing this chamber so here we are going to be sending this high pressure water through this particular chamber to this one to the radiant evaporator. So through the distributing header the water comes to the radiant evaporator. So here the temperature addition is going to be taking place so then this water comes to the this one convective evaporator. So means the temperature will be more here in this particular portion then it comes to the convective this one evaporator. So at the when it increases once again the temperature then passes through the separating drum here the separation of steam is going to be taking place. So this separated steam is comes to this one as a super heating stage. This super heated stage the water is available in the drum but only the steam is going to be passing through this one the super heating stage. So means we are going to be removing the final particles of the water if any presence is there in this pipeline. So the super heated steam then we are going to supply to the turbine we are going to supply to the turbine that we are going to call it as a prime mover. So here the same operation I am going to show it in the next slide as this one with the animation. This one particularly the information related to this the boiler I have given it in one of the slide all the compact information it is a water to boiler because the water is going to be flowing through this particularly the pipe it is a water to boiler. The fluid gases are flowing over the tubes. So here coming to this one as the working condition detailed description I given it in this particular the slide you can refer for the details also. So here just with the animation I am representing how exactly the working portion is going to be taken place here. So this is the radiant heater so then it is coming as a convective heater then it comes as a economizer only the addition of heat energy is going to be taken for the water and this is the air preheater. So just the differentiating I am going to show it with the Laumann boiler the details. So this is now the air preheater so the blower is going to work then the air is going to be supplied in this air preheater. So the air is coming out through this particular portion and this air we are going to be given it to the directly for the combustion chamber. This air is going to be given it for the combustion chamber. So just you can observe it here the feed pump is going to work. So here the feed pump is going to work. So through this feed pump the water is going to be circulated over the through the economizer to the separating the steam separating drum. So then this steam is going to be passing through the next the force circulating pump because we are going to be supplying the water at a higher pressure water we are going to be supplying at a higher pressure at a critical stage we are going to supply it. So that is the reason forced type of the circulating pump we are going to use it. So then that will come through the radiant heater it will come to the separating drum this separating drum here. So then it will pass to the super heating stage here it will pass to the super heating stage. So then it comes to the stage of the prime mover that is connected to the turbine. So let me know the comparison with the Cochran boiler. So what is the major difference you are going to be identifying in this particular boiler and the Cochran boiler. Cochran boiler is a low pressure boiler and that too one more important as low quality of fuel you can utilize it in the Cochran boiler. In the Cochran boiler it is a that Cochran boiler is a fire tube boiler and this is a water tube boiler. So the important information just you can observe it how exactly the working is going to be taking place in this particular portion and apart from that we are going to be passing the water through the tube through the economizer. So there we are going to be circulating with the higher pressure to avoid the bubbles of water should not locate in any part of the pipeline it is a high pressure boiler. We are going to be creating more than 65 okay more than 65 this one bar of the pressure you are going to be creating in this particularly the boiler. So it gives at a more than 65 bar pressure. So observing on this particularly the working I have shown it with the animation how exactly the operation is going to be taken place. The Laumont boiler it has a this one a preheater, economizer, super heater and radiant heater. The major difference you are going to be getting in this one as it does not have this particularly it is not going to make a low this water location in the pipeline because the water is going to be circulated at a higher pressure. My further studies you are going to be referring with the other next lectures okay further part will be covered in the next lecture thank you.