To reduce the volume of gas handled, it has to be cooled by first spraying liquor into the collecting mains and then by passing the gases through a number of heat exchangers.

• 为了减少气体的处理量,必须先将淋洗液喷入炼焦气收集管道,然后将炼焦气通过许多热交换器,以使其冷却。