[Q&A Question 137] 2016.09.04
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【Q&A Question 137】09.04.2016 What can cause a decrease in the water injection flow rate? The answer key will be available after responding; scoring is based on addressing the key points. 1. The pressure in the water injection tank decreases ； 2. Clogged pump inlet filter, pump malfunction, etc ； 3. Fault in the flow meter (flow control valve) on the pump outlet main pipe ； 4. System pressure increases ； 5. Air cooling blockage.
The first pump failed, resulting in less work being done. Second, there was a problem with the water injection control valve downstream of the water injection pump. Third, there is a problem with the flow meter used for water injection monitoring. Fourth, it is possible that ammonium salts have crystallized in the normal pipeline, blocking the inflow of water.
There is a problem with the pump; the backpressure is high and the system pressure drop is significant
The back pressure at the pump outlet is too high； The pump inlet filter is a bit clogged ； The liquid level in the pump inlet tank is too low; the effective net positive suction head is insufficient, resulting in slight cavitation in the pump ； The outlet flow meter is malfunctioning ； Impeller clogged.
1. The pressure in the water injection tank decreases； 2. Clogged pump inlet filter, pump malfunction, etc ； 3. Fault in the flow meter (flow control valve) on the pump outlet main pipe ； 4. System pressure increases ； 5. Air cooling blockage.
The pressure at the water injection point increases, and the water injection pump fails
Pump failure； Fault in the water injection control valve ； System pressure is rising
Low pump outlet pressure, short stroke, clogged outlet pipeline
Inspect the flow meter to rule out any faults with it; the water injection pump is faulty, there is slight salt deposition in the pipelines downstream of the water injection point, the filter at the inlet of the water injection pump cannot prevent flow properly, and the increased system pressure leads to reduced water injection