Tsinghua University

China National Environmental Monitoring Center

Shuli Zhao

Chao Wang

Lei Zhang

Junfeng Li

Jinlong Yang

Jianlong Wang

Mao Yuan

Disclosed is an automatic sample preparation device for sampling filter membranes of ambient air particulate matter. The device includes an air particulate matter sampler and a cutter, where the cutter includes a second conical tube. The second conical tube is provided with an air inlet and a sliding groove, a mounting frame is arranged on the second conical tube, sliding rods are arranged on the mounting frame, a sliding block is arranged on either of the sliding rods, and an elliptical frame is arranged on the two sliding blocks. A traction plate is arranged on the elliptical frame, a traction rod is arranged on the traction plate, a screening box is arranged on the traction rod, and the screening box and the sliding groove are arranged. A drainage block is arranged on the screening box, a discharging block is arranged on the drainage block, and screening holes are formed.

Automatic sample preparation device for sampling filter membranes of ambient air particulate matter

A method and an apparatus for processing radioactive wastewater are provided, wherein the radioactive wastewater is processed by using Disc Tube Reverse Osmosis (DTRO) membrane assembly, thereby achieving both the effects of high decontamination factors and high concentration multiples. In said method, the radioactive wastewater passes through the first-stage membrane assembly and the second-stage membrane assembly in sequence to obtain the second-stage clear water, and the first-stage concentrated water flowing out of the first-stage membrane assembly enters the third-stage membrane assembly to obtain concentrate.

Method and apparatus for processing radioactive wastewater

Growing community of inventors

Beijing, China

Shuli Zhao