Powder activated carbon pre-coating device for ultrafiltration pretreatment, pretreatment device and method

The invention discloses a powdered activated carbon pre-coating device, a pretreatment device and an operation method. The pre-coating device comprises a barrel and a cloth bag, sealing heads are arranged at the two ends of the barrel, and the cloth bag is arranged in the barrel. The pretreatment device comprises a pre-coating water inlet tank, a water pump and the powder activated carbon pre-coating device, a stirring device is arranged in the pre-coating water inlet tank, a feeding pipe and a circulating return pipe are arranged on the upper portion of the pre-coating water inlet tank, the circulating return pipe is connected with the powder activated carbon pre-coating device through a circulating valve, the bottom of the pre-coating water inlet tank is connected with a liquid inlet of the powder activated carbon pre-coating device through the water pump and a conveying pipe, and a liquid outlet valve is arranged on an output pipe. The operation method is divided into a coating part and a filtering part, a