Pipeline flow rate for gasified water coal slurry preparation
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Considering various factors such as pipeline pressure drop, pipeline wear, pumping equipment (slurry pumps, metering pumps, etc.), instruments (flow meters, control valves, etc.), and practical experience, what is the appropriate normal flow rate range for the various pipelines used in the preparation of water-coal slurry in a gasification unit under normal conditions? 1. Water-coal slurry 2. Additives 3. pH regulator
Generally, 30–50 m/s. Please advise.
Water-coal slurry 0.8~2m/s
Please specify the type of gasifier used in your plant – is it Texaco, four-nozzle, or Shell? Please clarify, as different types of gasifiers require different slurry flow rates
Water-coal slurry flow rate: 0.5 m/s~1 m/s. Last edited by xuqinger on 2008-11-29 19:27.]
The optimal flow rate for water-coal slurry is 0.8–1.0 m/s
For water-coal slurry: if the flow rate in the pipeline is too low, the flow measurements taken by instruments will be inaccurate; moreover, it is easy for blockages to occur, increasing the resistance in the pipeline； It’s too large, resulting in inaccurate flow measurement by the instrument. Generally, the normal range is 0.5–1.0 m/s, with the optimal flow rate being 0.7–0.8 m/s. I know that the maximum flow rate can reach nearly 1.2 m/s.
Hehe, the flow rate of coal slurry is generally set below 1 meter per second by the design departments at present； It’s too low, which has a significant impact on the flow meter ； The elbow area suffers significant erosion at high flow rates; therefore, it needs to be inspected regularly ；
What about additives (such as sodium lignosulfonate) and pH regulators (such as NaOH solution)? What flow rate should be considered appropriate for them?
In our plant, the flow rate is approximately 0.5 m/s. You can calculate the flow velocity by dividing the amount of slurry used in your facility by the cross-sectional area of the slurry pipeline.
The concentration of water-coal slurry is generally below 1 m/s, right?