Why is a lockhopper flushing water cooler needed?
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During normal operation, the temperature of each section in the lock hopper is higher than that of the low-pressure graywater; then why is it still necessary to install a lock hopper flushing water cooler to cool the low-pressure graywater?
The last edit to this post was made by liwei909 on 2015-7-15 at 14:32. The mechanical seal of the loop pump has temperature requirements; high temperatures of the slag water also affect the temperature of the wastewater discharged, and there are requirements regarding the temperature of this wastewater
Gases are in two-phase equilibrium; at higher temperatures, the concentration of the gas phase of water is higher, the partial pressure is greater, and the volume is larger； The large volume of gas has a direct impact on the pressurization rate. When pressurizing a lock hopper, it may seem that the pressurization process starts slowly, but it then accelerates over time. This is because the rate at which hot water adds pressure remains roughly constant, while the volume of the gas phase in the lock hopper decreases over time. Although the amount by which the gas phase volume decreases per unit of time is similar, the pressure increases more rapidly. After slag discharge from the hopper, the hopper is mainly filled with water from the hopper flushing tank; the low temperature of this water facilitates pressure building up in the hopper.
This post was last edited by wang06120325 on 2015-7-15 20:44. The principle behind this is the same as that used for switching to high-pressure gray water after normal production. It is all to prevent excessive water temperature from causing vaporization and thus resulting in uneven stamping. Here, we use low-pressure graywater for makeup water; since it is at the fourth stage of flash evaporation, the water temperature is not very high, so there is no need for such a heat exchanger. Additionally, since the high-pressure ash water pump sometimes operates at high capacity for extended periods, cold water is sometimes used directly during punching; generally, this does not cause any major problems.