Open circulating water thermal power plant raw water source device and control method thereof

The invention relates to an open circulating water thermal power plant raw water source device and a control method thereof. Currently, there is no a device of utilizing return circulating water to increase temperature of raw water and a control method. The open circulating water thermal power plant raw water source device comprises a first pipeline, a first pipeline check valve, a second pipeline, a second pipeline front valve, a second pipeline pump, a second pipeline rear valve, a third pipeline, a third pipeline front valve, a third pipeline pump, a third pipeline rear valve, a circulating water incoming main pipe and a clarifying pool connecting pipeline. The open circulating water thermal power plant raw water source device is characterized by further comprising a fourth pipeline, a fourth pipeline front valve, a fourth pipeline centrifugal clean water pump, a fourth pipeline rear valve, a fifth pipeline, a fifth pipeline front valve, a fifth pipeline centrifugal clean water pump, a fifth pipeline rear