Analysis of the reasons for low true flash pressure
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The TrueFlash pressure drop won’t go down. Dear fellow sea users, what could be the reason for this? Phenomenon: High liquid temperature under true flashing, low current in the vacuum pump.
True flashing involves controlling the evaporation of acidic gases from black water in a vacuum environment; what’s important here is low pressure
Control the liquid level in the vacuum flash tank carefully; it should not operate for long periods at a high liquid level. The vacuum pump is operating normally; check the performance of the vacuum level control valve, as well as the liquid levels in the inlet and outlet separation tanks of the vacuum pump, to identify any potential leakage points.
High black water discharge volume and large amount of flash vapor result in low efficiency of the true flash heat exchanger. The vacuum pump operates, with low current, but insufficient discharge capacity leads to overpressure
I think it’s probably a problem with the control valve or there’s a leak in the pipeline
What the poster means is that the vacuum level can’t be increased, right? There are many reasons for this. 1. Check for leaks in the pipeline. 2. The liquid level in the vacuum flash tank should not be too high, otherwise there will not be enough space for flashing. 3. The flash condensate tank should also not be too high. 4. Excessive blackwater discharge is also a cause. 5. The vacuum pump has failed.
Reasons for the low vacuum level in the true flash evaporation system: 1. Poor heat exchange efficiency of the E1303 vacuum flash condenser； 2. Fault in the pressure control valve of the PV1311 vacuum flash separation tank ； 3. Fault in the P1301 vacuum pump itself ； 4. Low water addition amount in P1301 ； 5. High liquid level in V1305 vacuum flash separation tank ； 6. The amount of water entering the vacuum flash tank is large ； 7. Blockage in the drainage pipeline of the vacuum flash tank ； In your case: the temperature of the liquid during flash evaporation is high, while the current drawn by the vacuum pump is low. When the vacuum level in the true flash unit is low, the liquid dropping temperature will definitely be high; this cannot be used as a basis for making judgments ； The vacuum pump current is low (should the liquid level be high?) ), it seems very likely that there is a blockage in the vacuum flash drainage pipeline; in particular, the inlet of the sedimentation tank feed pump P1309 is likely to be partially blocked.
Reply to 2# 15327345: Haha, that’s absolutely right.
Reply to 3# 196408: Thanks for the advice, haha. Thank you.
Reply to 7#: The goldfish is fine, thank you. You explained it in great detail.