Boiler, which is a website product and keyword, and is the main and important product in the website, so the learning requirements are relatively high, and it needs to have a comprehensive and in-depth understanding, and can not stay on the surface or only a shallow level of understanding. Therefore, based on the learning requirements of the product, and in order to enable everyone to reach the learning objectives and requirements as soon as possible, the following will explain the relevant knowledge of the product, and its explanation is as follows.
1. Do different boilers have different efficiency?
From a professional point of view, the answer to this question is that different boilers have different efficiencies, and this is also not to be doubted. For example, the efficiency of industrial boilers is 50%-70%, and the thermal efficiency of low-pressure industrial boilers is designed. It is 70%-90%, but the thermal efficiency during actual operation is 60%-80%. Power plant boilers are generally more than 90% efficient.
2. What are the advantages of circulating fluidized bed boilers in boilers compared to older boilers?
Circulating fluidized bed boiler, which is a specific type of boiler, and compared with the old boiler, can draw a conclusion that it has certain advantages for the circulating fluidized bed boiler, which is: it has great improvement in combustion technology and Improve, this can improve the boiler combustion quality and combustion effect, and in turn, to improve the boiler effect. This is achieved because two returners are used in this type of boiler to allow the fuel to form a circulation loop between the furnace and the return.
3. What is the primary air rate of the boiler?
In order to improve the combustion efficiency of the boiler, in a large boiler, the air is not fed all at once, but is fed in two times, one is fed with the fuel, and the other is directly fed into the furnace. The primary air rate of the boiler refers to the proportion of the primary wind. If the total air volume is 100% and the primary air rate is 70%, the secondary air rate is 30%.
4. Why do you use low heat generation instead of high heat when calculating boiler thermal efficiency?
This is because, under normal circumstances, the exhaust temperature of the boiler cannot completely condense the water in the flue gas, and the difference between the low calorific value and the high calorific value is mainly in the part of the latent heat of vaporization, so the low heat is used. The value is calculated to reflect the true efficiency of the boiler. However, there will be some special circumstances. For example, if the boiler is a condensing boiler, the calculation of the condensed water portion should be calculated using the high calorific value.