Seeking advice on measuring steam flow rate
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Regarding the issue of measuring steam flow rate. Dear experts, in our ethylene plant, due to the relatively narrow design of the pipe racks in front of the cracking furnaces, orifice plates are used for measuring the flow rate of dilution steam. The instrument box is installed at a higher height than the orifice plates (on an additional platform erected on site, as there isn’t enough space on the ground to accommodate the instrument box), and the pressure transfer pipes are quite long. As a result, after installation, the measurements of the dilution steam flow from the 5 cracking furnaces are inaccurate, making it impossible to proceed with further investments. We earnestly request advice from experts on effective solutions! My phone number is 13236775755
It probably won’t work if it’s placed on top; we use steam condensation, with heat being transferred through water
When measuring steam flow, it is necessary to ensure that the pressure guide tube is filled with liquid; otherwise, errors will occur.
The issue with the installation method of the flowmeter, where the measured medium is steam, is resolved once it is taken into account. It is explained in the book titled \"Design Manual for Flow Measurement Throttling Devices\".
The transmitter should be placed below, in the steam condenser.
It can be above or below the flow meter; either is fine. The important thing is that the area below the condensation tank should be filled with condensed liquid.
Reply to 6# backhamm1982: Can the pressure tap for steam be installed vertically upward? What are the disadvantages of doing so? I am very interested in learning about the operation of the 1 million-ton ethylene cracker in Dushanzi; our process is the same as theirs, both using SW. The steam measurement situation here is terrible! 13236775755
Orifice plates are used to measure steam. Among them, the calculation parameters of the orifice plate are very important. If the parameters used in the calculation are incorrect, how can an accurate flow rate be measured?
How did you make such an inaccurate judgment? There should also be a comparison to see whether it’s accurate or not. . . You just need to adjust your flow meter to achieve a linear and stable flow rate. After running for a prolonged period of time, once the actual steam flow rate is estimated, it should also be possible to switch to automatic mode.
There’s no problem with installing it on a transmitter, but a condenser needs to be added. It is necessary to ensure that any excess water in the condenser can flow smoothly into the pipes.
Check your pressure pipes to see if the positive and negative pressures are at the same level. Then, if there is a condensation tank, fill it with isolation fluid by yourself to ensure that the pressures on the positive and negative sides are equal.