What causes large fluctuations in coal slurry flow rate?
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Recently, the coal slurry flow meter in our water-coal slurry gas generation process has been showing significant fluctuations. What could be the possible causes?
1. Reasons related to the flow meter； 2. Reasons for the slurry pump ；
1. The slurry flow meter uses a 3-to-2 configuration; by making comparisons, it is possible to determine whether there are issues with the measurement. 2. Excessive wear of the burners 3. Failure of the buffer device in the slurry pump 4. Excessively high slurry concentration, leading to local sedimentation 5. Large particles present in the slurry that block certain burners. Please, Chuan You, add more reasons if any
The coal slurry flow rate should consist of three types of measurements: one based on rotational speed, and two based on electromagnetic flow measurement. If one of the flow meters shows large fluctuations, it is likely that there is a problem with that meter. If the other two meters also exhibit fluctuations, then check whether there is a problem with the pump, whether there are variations in the burner pressure difference, whether there are changes in the composition, or whether there are changes in pressure. If there is a problem, then all the other measurements will also change accordingly.
Is it possible that the density of the coal slurry itself is uneven?
First, it is necessary to confirm whether there has been any change in the quality of the coal； Next, we need to check the issues with the flow meter itself, to see if the parameters need to be adjusted.
1. First, determine whether it is a problem with the electromagnetic flowmeter; based on current circumstances, it is unlikely that the electromagnetic flowmeter will give completely accurate readings. We must assess its accuracy from various aspects. 2. Electromagnetic flowmeters are subject to other electromagnetic interferences. 3. The dampener diaphragms at the inlet and outlet of the slurry pump may be damaged or not functioning properly. 4. Stuck inlet and outlet valves of the coal slurry pump, worn valve heads, failed springs, and worn gaskets. 5. There may be blockages in the inlet and outlet pipelines of the coal slurry pump.