Question: Is the water consumption for boilers equal to the steam output? The owner keeps saying that the reading of the steam flow meter is lower than the water consumption
Thread Content
As the title suggests, this cannot be handed over. Water turns into steam after passing through the boiler; what is the relationship between the amount of water and the amount of steam? (The unit is tons.) Does the amount of water in tons get converted into the same amount of steam in tons? Is there still a proportional relationship? The current problem is with the steam flow meter at the rear end of the boiler. The owner says that the amount of steam indicated is much less than the amount of water used; this doesn’t seem right. The steam flow meter is installed not far behind the boiler, so there should be no loss of steam, and it is located indoors, eliminating the influence of environmental temperature. Dear experts, please give me some advice. Thank you!
Does that mean the client requires that as much water is used as needed to produce that much steam? Then he’s really amazing. . . . . .
It’s different; the boiler discharges water both through continuous drainage and scheduled drainage
There seems to be a proportion, it’s not 100%
The boiler doesn’t drain water, right? . . .
From the perspective of steam generation, boilers can be divided into two main categories. One type is called a drum boiler; in this type, the water does not get completely vaporized, as there is both periodic and continuous drainage of water. The water that is drained cannot be converted into steam. In these boilers, the amount of water supplied is greater than the amount of steam generated. The other type is called a direct-flow boiler; in this type, the water entering the boiler’s evaporator is completely converted into steam. In such boilers, the amount of feedwater and the amount of steam generated are essentially the same.
No matter how good the technology is, it cannot achieve a 1:1 conversion； An appropriate conversion rate is essential!
Steam boilers have specific requirements regarding the quality of the boiler water, as stipulated in standards such as the \"Quality Standards for Water Used in Industrial Boilers\" (GB/T1576-2018) and the \"Quality Requirements for Water and Steam in Thermal Power Generation Units and Steam Power Equipment\" (GB/T12145-2016). Different parameters apply to the requirements for feedwater and boiler water in various types of boilers. As the boiler water continues to evaporate, impurities present in it – such as salts, impurities introduced during pipeline transport, and chemicals added to the boiler – become increasingly concentrated. Since the pH level of boiler water is alkaline, when it becomes sufficiently concentrated, a problem known as foaming can occur, resulting in large amounts of water being carried along with the steam. This, in turn, can affect the safe operation of the boiler and the equipment that uses steam. Therefore, **the standards impose strict requirements on the water quality parameters of boiler water. Boilers are typically equipped with regular and continuous blowdown systems; these systems are used to control the salt content in the boiler water as well as the impurities that settle at the bottom, thereby ensuring the safe operation of the boiler. Generally, the boiler blowdown rate should not exceed 10% when softened water is used as boiler feedwater; when demineralized water is used, it should not exceed 2%. For more details, please refer to the relevant provisions in the “Design Standard for Boiler Rooms” (GB50041-2020).
I’m not a power plant, and neither are you. We’re both human beings, okay?
He missed typing one character: Are you from a power plant? I guess you are, or at least have been in quite a bit of contact with them. Only people from power plants and power construction industries use the terms \"drum boiler\" and \"direct-flow boiler\"; such terms are rarely seen in books. The classification is based on the presence or absence of a drum. The sewage discharge rate is low under forced circulation, high under natural circulation, and it varies depending on the design in the case of combined circulation.