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Is the installation of all bar type flow meters the same? Thank you
The so-called Ba class refers to the power bar, Aniu, Bader, and other types of flow meters. Most of these types of flow meters are installed in a plug-in manner, that is, a hole is opened in the pipeline to insert the flow meter, and flange installation or thread disassembly is used. It is rare to have Ba class installed on a section of pipeline, which is connected to the flange at both ends of the measuring pipeline. The advantages of buses are that multi-point measurement is more scientific and installation is simple. The disadvantages of buses are that their actual anti blocking and anti rolling ability is very poor, which is inconsistent with the promotion.
2. What are the good maintenance free devices for measuring the secondary air volume in thermal power plants?
First, let me explain the reason for the ash content in the hot air. In my opinion, it is definitely caused by the leakage of ash from the air preheater.. At present, rotary air preheaters are commonly used in domestic thermal power plants. If the sealing is not good, the hot air will carry ash. If the air preheater does not leak, no matter how much ash is in the air preheater, it will not leak into the hot air. So I dont think the reason for the poor dust removal mentioned by sonic cleaning is the direct cause. At present, various types of buses are still quite useful for "steam flow measurement" in thermal power plants, but they have long been eliminated in terms of air volume measurement. In my opinion, history has developed in such a way that the earliest measurement devices were wing type, single wing, dual wing, and multi wing... Pipeline wing.. Indep
1. It is extremely easy to clog and requires a large amount of maintenance. Some factories even have regulations that require full maintenance every three days (bottom ash discharge, overall blowing of the pressure pipe)
2. It has serious throttling and is not energy-saving. Wings are throttling elements that cause severe compression (resulting in large differential pressure) when fluid flows through pipelines.
3、 Overall bulky and difficult to replace. Later, foreign power bar entered this stage, belonging to the equal velocity tube flowmeter (insert type), with about three pipes inserted into each point of the air duct to form a grid layout (which is correct). Due to its insert type, it has less air resistance and is outstanding in energy saving. It is claimed that due to the special structure of aerodynamics, the device is not afraid of dust. However, the biggest disadvantage of such devices is precisely blockage. I wont analyze the reason anymore. From the facts, it can be seen that almost all types of bars in the later stage must be equipped with reverse blowing devices for hot air measurement, which indicates the problem. Due to the fatal flaw of Ba class, ash can only enter but not exit, which can cause death during operation. So much so that even later it couldnt be blown. Foreigners products are relatively expensive, and there are many imitations in China. In order to prevent blockages, some manufacturers even make the holes very large, which damages the linearity. The problem of blockage still hasnt been resolved. What is the power of Anuba? There are many variations such as Super Power Ba
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