▎ 摘　　要

NOVELTY - The utility model claims a field emission device for treating sewage, comprising a power supply, a shell, a multilayer graphene plate, hollow-out partition, a copper electrode and a graphite electrode, the shell is a hollow box body structure; multi-layer graphene flat and hollow clapboard is set inside the shell, the hollow-out partition the graphene flat uniformly divided into multiple groups, each group of graphite plate are the same, the copper electrode and the graphene electrode are respectively set on the shell, the copper electrode and the graphene electrode is connected with the power supply. the device in the process of treating polluted water body, without adding any chemical preparation and biological species, will not affect the microorganisms, growth of the aquatic plants and fish, it has low energy consumption, high efficiency, low investment and large covering radius, and does not produce secondary pollution and other factors and so on. applicable to the treatment of river, lake and sea, the ecological water treatment, smelly water treatment, and recovery of natural ecological function of water.