The invention provides a circulating blowdown device for
seawater treatment, and belongs to the technical field of
seawater treatment equipment. The circulating blowdown device for
seawater treatment comprises a first filtering mechanism and a chemical mixing mechanism. The first filtering mechanism comprises a base, supporting legs, a filtering cylinder, a first pump body, a first water conveying
pipe, a second water conveying
pipe, a first water outlet
pipe, a first valve and a first filtering
assembly. The chemical mixing mechanism comprises a reaction cylinder, a first supporting piece, a driving piece, an
auger, a second pump body, a third water conveying pipe and a fourth water conveying pipe. The reaction cylinder comprises a cylinder body, a chemical feeding pipe, a fifth water conveying pipe and a second valve. According to the device, the inner wall of the cylinder body and the
auger can be directly flushed in the one circulation process after seawater treatment is completed, the device does not need to be opened for manual cleaning, and the cleaning efficiency is greatly improved; and meanwhile, a first filter screen on the used first filtering
assembly can be cleaned or replaced under the conditions that the
machine is not stopped and the
normal filter function of the device is not influenced.