The water sent to the carbon scrubber tower by the feed pump for that tower flows to the inlet of the quench water pump; the function of this water is
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As the title suggests, I am still in the * stage of learning. From the flow diagram, it can be seen that the water sent to the carbon scrubber by the feed pump for the carbon scrubber goes to the inlet of the quench water pump. However, this pipeline in the plant has hardly been used so far. I would like to ask the experts here: what is the purpose of this water? When is it used? When is it utilized during startup or shutdown procedures, and what is its function?
I’m wondering whether, during the carbon washing process, water condenses and causes the liquid level to rise, while rapid cooling leads to water evaporation – perhaps this is done to maintain equilibrium between the two systems. This is just my personal opinion for reference only. This post was last edited by xuqinger on 2009-3-4 22:41]
This water is mainly used when the system is shut down to prevent cavitation in the water pump. Generally, after shutdown, the pressure in the vaporization furnace and carbon scrubber drops rapidly, and at that time the water temperature is high, which makes cavitation in the pump very likely to occur. Therefore, in the design, this water (which has not passed through high-pressure ash water heat exchange) is used to supply water to the pump inlet in order to prevent cavitation. But it’s basically useless, because the liquid level in the vaporization furnace rises quickly after parking; usually, the quench water pump is simply stopped and high-pressure water is directly injected into the quenching ring. So this design was never used.
It is mainly used when there are problems with the cooling water pump or when the flow rate of the cooling water is too low; high-pressure gray water is then used to supplement and maintain the amount of cooling water, ensuring the system can operate for a short period of time. In practice, due to lack of use over extended periods, this pipeline gets blocked, and it is not utilized in actual operations.
The answer on the 3rd floor is correct; however, only a few companies switch the chilled water directly to the high-temperature hot water pump after parking the vehicle. During the pressure relief process, if the system pressure drops too rapidly and falls below the saturated vapor pressure of water, cavitation can occur in the cooling water pump. Many manufacturers indeed do not supply water to the inlet of the cooling water pump after shutting down the system, but cavitation still occurs from time to time, which is detrimental to the maintenance of the pump. It is recommended to closely monitor the temperature of the cooling water and the system pressure during pressure relief, and to supply cold graywater to the inlet of the cooling water pump when necessary.
Water entering the quench water inlet is used to prevent cavitation in the quench water pump in the event of a system shutdown. When the flow rate of cooling water in the system is low, the interlock system will activate the emergency cooling water supply; the feed pump of the carbon scrubber will then draw cooling water directly from the emergency cooling water pipeline
If the pressure is reduced as required by the system and the water in the system is replaced, it may not be necessary to add water urgently.
What was said upstairs is absolutely correct. After parking the unit, we generally replenish water to the water washing tower from below, thereby reducing the temperature of the quench water and controlling the rate of pressure drop; there is no need to supply cold water at the inlet of the quench water pump. These are mainly the result of accumulated operational experience; designing the water flow in that area is indeed reasonable for preventing pump cavitation.
Obviously, the 3rd floor is correct. Support! ! We drove from the start and never used that valve at all. :lol
It has a valve called the accident water valve, whose function is to prevent cavitation when the cooling water pump trips or stops.
It is mainly to prevent cavitation in the chilled water pump
It is emergency quench water to prevent cavitation in the quench water pump
1# 49937790 is mainly used to prevent cavitation in the quench water pump