How to calculate quench water volume
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consult: How to determine the amount of chilled water? Mainly I want to know how to calculate or roughly estimate the quench water flow rate at different pressures and temperatures.
You can do a simple heat balance calculation, know the gas composition, temperature and pressure at the outlet of the gasification chamber, and also know the temperature and pressure of the gas in the quench chamber. You can roughly estimate the heat released by cooling the gas product, and then use this heat to saturate water, and you can roughly estimate the amount of water required. If there is software, it will be easier to get the results. This post was last edited by shanxg on 2009-4-7 08:53 ]
Software should be used to calculate it. The composition of the gas and the heat release can be estimated, but the heat release of the slag is not easy to estimate, and if it is chilled, the outlet condition should be the temperature.
What the 2nd floor said is correct. The heat balance calculation method is of course easier to use software to calculate.
The gasifier temperature, outlet process gas temperature, system pressure, load, quench water temperature and slag amount are determined. The heat required (or released) for the corresponding phase state change, and the heat required (or released) for the same phase state temperature change (check relevant information) are determined. Solve an equation……
The most important thing is to conduct a water distribution test. Calculation alone is not enough.
Thank you for your advice, but there is another question. The heat balance can be used to calculate how much water is needed for cooling and saturation. However, part of the quench water in the gasifier is for this purpose, and it is also used to purify the water quality in the quench chamber. So how to determine this requirement? How much water can ensure the water quality of the gasifier? Is there any estimation method?
It should be added that in addition to considering the heat, the minimum amount of water that can form a water film on the inner wall of the downcomer must also be considered. This amount of water must also be able to withstand the impact of the high-speed airflow coming out of the combustion chamber.
If it is just to meet the requirements of uniform water film distribution on the downcomer, this is the minimum flow rate to protect the downcomer.； I think what the poster means is the optimal quenching water volume to meet the next process and interlocking requirements (process gas outlet temperature) under a certain pressure and load.