Introduction
What is economizer in boiler?economizer efficiency calculation|Why economizer is used in boiler? Economizer in boiler|economizer in thermal power plant.
Today I am going to tell you about the economizer. how the economizer works, what the economizer is used for and how the efficiency of the economizer is calculated. By how much degree will the temperature increase in the economizer. by how much percent will the efficiency of my boiler increase? today we will also talk in detail about Economizer in boiler.
What is economizer-
Firstly, we will understand what is Economizer in boiler. Economizer is a waste flue or seat recovery unit which works as a heat exchanger. Where the temperature of flue gas is indirectly transferred to the feed water, due to which The temperature of the feed water increases. The economizer works in the heat transfer principle. Which is the working principle of the economizer.
The economizer works in the heat transfer method. The economizer works to pre-heat the feed water through boiler exhaust flue gas or feed water. Feed water works to increase the temperature of water. To make steam in the boiler, we use hard flow gas. We use hard flue gas in the steam we make in the boiler, where we will give coal and heat the boiler.
By using the heat energy, we create steam. After that, the heat energy that is left after the steam is form, subsequently adjust and goes out of the boiler. The flue gases go out. There is some heat energy in it and there is some heat energy left. And If it is not used then this heat energy will go into losses, or this heat energy will get destroyed, this is the heat energy or waste.
How Economizer is work-
To use the heat energy, we use an economizer. Economizer is a mechanical device which works to heat the feed water through waste exhaust heat energy. If we increase the temperature of feed water before enter it into the boiler. then Coal consumption in the boiler will also be reduced. due to which the efficiency of the boiler will increase.
And my cost will also be reducing. With this we can save money also, that is why we call it economizer. What will it do to the economy by maintaining the economy of the boiler? The economizer will pre-heat the feed water by using the thermal energy. What is this? According to the calculations, the temperature of my water is increasing in the economizer, and it is happening for free.
We can see in video that in economizer. Water is coming in, cold water is coming in, and hot water is coming out. We will also learn about how cold water is convert into hot. The cold water that is coming in is coming in the inlet header and hot water is coming out from the outlet header. and the middle part is the tube in the middle.
What is happening to me in the outer layer of the tube? Exhaust flue gases are flowing in. Exhaust flue gases are coming in from one side. And after coming out from the other side, it is going into the chimney. What happens in this. whatever heat is transfer to your economizer. indirectly the heat of flue gases is transferred to cold water in your economizer and the temperature of flue gases.
How economizer increases tempreture-
If the economizer temperature increases by 6 degrees, the boiler efficiency will increase by 1 degree. Additionally, if the temperature difference between the economizer inlet and outlet is 6 degrees. the boiler’s draft intensity (DI) will increase by 1 degree accordingly.
From this, we can find out by what percentage I increased the efficiency of the boiler by using the economizer. If the temperature in the economizer increases by 6 degrees, the efficiency of my boiler will increase by 1. Divide the economizer outlet temperature minus. the economizer inlet temperature by 6 and from that you will know. How much percent efficiency is my economizer increasing in the boiler? After that we will see which is my flue gas.
If there will be a difference of 16 degrees between the flue gas inlet and outlet temperatures. as a result, then the efficiency of the boiler will increase by 1. The temperature of the flue gas in the economizer will be 16 degrees. On decreasing, the efficiency of the boiler increases by 1 degree. If we increase the temperature of fuel water 10 degrees inside. In the economizer, the fuel cost will be save 5 degrees.
If we increase the temperature of water by 10 degrees in the economizer, then my cold feeding will be saved by 5 degrees. Inside the economizer, we can save up to 25% of the fuel cost. If the efficiency of the economizer is good, we can save up to 25% of the fuel cost. The economizer will keep the boiler economy healthy.
Economiser is used in boilers to-
What will the economizer do to the boiler economy? The economizer will help in maintaining the boiler economy. The boiler will maintain the economy, that’s why we call it economizer. What will it do? It will maintain the boiler economy and will also increase the boiler efficiency. What will we do with the Economizer in boiler? Inside the economizer, the efficiency of the boiler can be directly increase up to 20%. Economizer in boiler.
The efficiency of the boiler will directly increase up to 20 Para. Economizer helps in bringing the feed water to saturation temperature very quickly. What does the economizer do? It brings the feed water to saturation temperature as quickly as possible. Economizer helps in bringing the feed water to saturation temperature at 43 Para from the boiler heating surface area.
The surface area remains which is the surface area of my Waller, its surface area remains up to 43%. The surface area of the economizer remains, sensible heat is added to the water inside the economizer, sensible heat is added to the water inside the economizer, we are the ones who are adding heat to the economizer.
What kind of heat is being added? Sensible heat is being adding. What is the meaning of sensible heat? Where there will be no phase change, there will be no phase change. Only the temperature will increase. If there was water in it, it will remain water even under pressure.
There will be no difference, but what kind of difference will there be? There will be a difference in the empty temperature. If the temperature was low, then what will happen there? If the temperature becomes high, it means that we have added sensible heat and have done the work of increasing the temperature.
Advantage of Economizer in boiler-
Now we will know what will happen to us by using economizer. -What did you get? What are its benefits? We will know its advantages. What is the life of the boiler increase in it?
1.
In the first place, the life of the boiler is increase. How is it increase? What happens in it? Hot water temperature reduces the thermal efficiency of the boiler, which means it reduces the thermal efficiency of the boiler. It reduces stress. Economizer in boiler.
2.
Fuel consumption is reducing. Economizer increases water temperature by utilizing flue gas. If you directly feed cold water into the boiler, it will take time to heat cold water and your heat usage will also be more. This would mean that the coal feeding will increase more. but if the water is heated before feeding it into the boiler. then what will happen to me? My water will get convert into steam in a short time and with less coal feeding.
What is happening, my coal consumption got saved, second thing.
3.
I got is increased evaporated capacity of boiler, which is the evaporating capacity of the boiler, it will increase the evaporating capacity of the boiler, if we see the benefit of it. There is no benefit to us by installing an economizer, but there are draft losses because what we think is the economizer, it comes after the boiler outlet.
What do we think of the economizer in the boiler outlet. and what will the economizer do to furnish draft? Will cause loss due to which I have to increase the percentage of ID. Now I am going to tell you how to calculate the efficiency of the economizer. By calculating the efficiency of the economizer. we can determine whether the economizer is working well or not.
We can find out whether heat exchange of flue gas is taking place in the economizer or not. To find out, we calculate the efficiency of the economizer. We calculate what percentage of the economizer is working or how much of it is working. We can find out that heat exchange is taking place. The formula of efficiency is equal to feed water outlet temperature minus feed water. inlet temperature divided by flow gas inlet temperature minus feed water inlet temperature in 100. Economizer in boiler.
Efficiency of the economizer
Okay, now according to this we will see. What is the efficiency of the economizer here? We will calculate here how much efficiency the economizer is producing. First of all, we have to know what is the economizer inlet temperature. Here, the economizer inlet feed water temperature is 120 and the economizer outlet feed water temperature is 120.
190 and flue gas inlet temperature is 350 degree. We can calculate the efficiency in these three things. According to the formula which was there, now we will see here what is the feed water outlet temperature. 190 is 190 minus what is the feed water inlet temperature. 120 is 120 and we will divide it. Flue gas inlet is 350 minus and we will subtract this.
We will divide 120 feet (36.58 m) water in litres by feed water inlet. which was in the formula. Now we will calculate it and see 190–120. Coming to this is 70 divided by 350–120. This is coming to 230 × 100. If we divide this. then what is coming is mine. If we divide this then it is coming to 30.4 which is the efficiency of my economizer.
Coming to this is 30.4. What was this economizer? It means that my economizer is working or what percentage of heat it is using. we can find out from here, the efficiency of the economizer is coming to 30, from this we can find out within a year. Economizer is saving coal consumption at 30. what does it mean? My coal consumption will be saved till 30 in a year.
Coal consuption-
What is my coal consumption at 30. it has been saved, that is why we call it what we call economizer. What about boiler? It will save the economy of the boiler. will maintain it and will increase the life of the boiler. it will increase the efficiency of the boiler, this was about the economizer. Now we will know how much percentage is the efficiency of my boiler from the economizer, for this we can also check it with water and flue.
You can also check with gas. To check with water, divide the feed water outlet temperature minus feed water inlet temperature by six. The amount that comes out is the percentage of efficiency of your boiler, and you have to check with flue gas. The flue gas in temperature is minus flue gas out. Divide the temperature by 16.
What will come? What is your flue gases? Flue gases will tell you what percentage of boiler efficiency is increasing in the economizer. We can see it from water as well as from flue gases. What does it mean? There is a difference of 16 degrees in the outlet due to flue gases. then the efficiency of my boiler will increase by 1. Economizer in boiler.
If there is a difference of 6 degrees in the water temperature, then the efficiency of the boiler will increase by 1.
conclusion-
Finally, friends, that’s all for today. How did you guys like this article? If you liked this article. then subscribe to the us. and if you want to get more information about economizer. then you guys comment about. which I try to make an article. Economizer in boiler.
