Ultrafiltration system for producing high-protein low-lactose milk

The utility model relates to an ultrafiltration system for producing high-protein low-lactose milk. The ultrafiltration system comprises a first buffer tank, a second buffer tank and a third buffer tank, the first buffer tank is communicated with a liquid inlet of the first conveying pump. And a liquid outlet of the valve module is communicated with the second buffer tank. The main pipeline is provided with a first branch pipe and a second branch pipe, an inlet of the main pipeline is communicated with a liquid outlet of the first conveying pump, and an outlet of the main pipeline is communicated with a liquid inlet of the valve module. A liquid inlet of the ultrafiltration unit is communicated with the first branch pipe, a concentrated liquid outlet of the ultrafiltration unit is communicated with the second branch pipe, and a dialysate outlet of the ultrafiltration unit is communicated with the third buffer tank. The production process can be carried out at low temperature, a physical method is adopted for