Selection and application of methods for measuring the flow rates of ash water and black water in gasification furnaces
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This post was last edited by Liu An Hua Ming on 2010-11-8 09:17. Which is better for measuring the flow rates of black water and gray water in a gasification furnace: a Venturi meter or a wedge-shaped flow meter? The wedge flow meters used in our company performed fairly well at first, but after some time of use, either the wedges were worn out due to erosion, resulting in large flow rate deviations, or the pipes became clogged and this led to erosion and leaks in the pipe walls, forcing us to shut down the furnace for repairs. Are these same problems likely to occur with venturi meters? I ask my colleagues for their help! Process parameters: Pressure: 4.0 Mpa; Temperature: 200–260°C; Medium: Black water or gray water; Diameter: DN80 or DN100
This is a new issue for wedge flowmeters; could you provide more detailed information on the process parameters?
We designed it as a wedge-shaped remote-transmission differential pressure flow meter, and actual field use has not shown any issues with its performance.
Reply to 3# backhamm1982: This is a long-standing issue with regard to the measurement of black water flow in gasifiers; it’s specific to Texaco gasifiers and not very effective. This problem persists every time they are disassembled for inspection. However, in other applications, wedge flow meters can work well.
Due to heavy scouring by black water and gray water, most wedge flow meters have a short lifespan. Mainly, if the product quality is high, it can last longer; however, such problems can also occur with venturi devices.