Evaporative hot water tower Low-pressure flashing
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In the four-nozzle gasification furnace process, when treating slag water, the gas at the top of the evaporative tower is divided into two streams: one stream goes directly to the stripping converter, while the other stream passes through a heat exchanger and a gas-liquid separator before reaching the converter. Why is this done? How is the amount of gas divided into the two streams? Low-pressure flashing is also divided into three streams: one goes to the steam ejector, another goes to the deaeration tank, and the third is discharged after passing through a heat exchanger and a separator. Is there any basis for determining how much gas goes into each stream?
You can analyze these from the perspective of process requirements
Some drawings have been shared for everyone to analyze
It’s included in the material balance; check it out.
It is all determined by the process requirements; each circuit has a primary and a secondary role, with the volume of the secondary circuit being determined based on the needs of the primary circuit.
I would like to ask whether going through a heat exchanger and then undergoing conversion results in the same steam stripping process. If so, the first step involves passing the material through a heat exchanger for stripping, in order to control the amount of gas used for stripping and prevent excessive high-pressure flash vapor from being generated, which could lead to overheating and overpressure during the stripping process. Second question: among these three destinations, there must be priorities to be met, and only when there is an excess of low-pressure flash steam will it be vented.
Well, after passing through the heat exchanger, it also goes to the gas lift tower