What is quenching water?
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In the gasification process, what does quench water mean, where does it come from, and how is it handled?
Quench water is required to cool the gas produced by gasification; the molten slag solidifies after being cooled by quench water, and is then discharged to the slag pool via a lockhopper. The high-temperature syngas is cooled to maintain a certain water-to-gas ratio, thereby providing qualified water-gas for the next processing stage.
The quench water carbon scrubber is used primarily to cool the syngas and slag, while also protecting internal components such as downcomers
Quench water can be simply understood as water used for rapid cooling. As already answered by a fellow user, after the slag water is filtered to remove slag, it passes through a washing tower and a heat exchanger, and then is fed back into the furnace via quenching circuits for reuse. It is primarily used in the powder coal gasification process within the quenching system, and its functions include: ① washing the crude syngas: removing dust, cooling it down, and saturating it； ②Cool the liquid slag, causing it to cool down instantly and turn into glassy fragments ； However, in the BGL gasification process, the quenching water is used solely to cool the liquid slag; as soon as the liquid slag enters the quenching chamber, it is cooled and turned into glassy fragments ；
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Literally, it is mainly used to cool high-temperature water gas
Cooling water is used to cool the burners, feed ports, and furnace chamber of the gasification furnace, thereby preventing components from being damaged by high temperatures. Quench water is located in the quench chamber of the gasification furnace, and it is used to cool the syngas as well as the slag that falls there. The quench water is pumped from the scrubber tower to the quench chamber by a quench water pump.
To protect the quench ring, downcomer, quench chamber, and process gas outlet pipes, primarily for washing and cooling the process gas