Issues with the vacuum level in the dechlorination tower
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This post was last edited by sunjl1981 on 2013-1-7 00:07. These past few days, the vacuum level in our dechlorination tower has been extremely unstable; it should normally be maintained at -70 kPa, but recently it hasn’t reached that level, staying between -68 kPa and -70 kPa. The reflux valve is already fully closed – what could be the reason? Of course, apart from pipeline leaks and the suction power of the vacuum pump, another factor is that the chlorine temperature in our vacuum system is relatively high, around 40 degrees. The water discharge from the vapor-liquid separator is not normal; some of the water flows back through the vacuum pump. What other factors could cause this situation? Temperature, pH, and liquid level are all stable # + +.
Is it possible that the PCV310 has water accumulated in it? If your control valve piping is designed in a U-shaped format, draining the water will resolve the issue
A vacuum level of 68 kp is also acceptable; the key is to check whether the chlorine removal efficiency and the consumption of sodium sulfite at your location are within normal ranges. The issue you mentioned might be caused by a clogged cooler in your vacuum pump; take it apart to check, and it will be fixed after the problem is addressed.
Check the chlorine water coolers of the chlorine cooler and the vacuum pump to ensure there is sufficient water volume. The dechlorination vacuum level should preferably be close to 80 KPa.
How effective is the water replenishment function of the vacuum pump? If the temperature of the heat exchanger behind the vacuum chamber is too high, it can draw away the water inside the pump. In a liquid ring vacuum pump, insufficient water leads to a decrease in pumping capacity; here, a vacuum level of 60 is sufficient
The cooler does not provide adequate cooling, resulting in high chlorine content and increased load on the vacuum pump
The cooling effect of titanium cooling; also consider whether the level gauge in your dechlorination tower is inaccurate, as the liquid level is high