Flue gas purification treatment device and flue gas purification method

The invention relates to a flue gas purification treatment device and a flue gas purification method. The flue gas purification treatment device comprises a partition plate assembly, and the partition plate assembly comprises a plurality of partition plate units. Flue gas passes through a spraying layer, carries ammonium sulfate salt generated after desulfurization, ammonia which does not participate in reaction and particulate matter carried by the flue gas, passes through the device and is in full contact with liquid in the device, and the washed clean flue gas passes through the demister and then is discharged into the atmosphere. The flue gas purification treatment device disclosed by the invention can be used for treating ammonium sulfate salt and unreacted ammonia entrained in the flue gas in the operation process of the ammonia-process desulfurization device, so that the economical efficiency of ammonium sulfate of the ammonia-process desulfurization device is improved, and meanwhile, the pollution to