Wastewater pipeline cleaning device

The utility model discloses a wastewater pipeline cleaning device, belongs to the field of coal chemical industry, and solves the problems in the prior art that the flow of discharged wastewater is reduced and the water quality of a system becomes poor due to scaling in a wastewater pipeline. And a water outlet of the gasification grey water system is communicated with a water inlet of the sewage treatment system through a grey water operation pipeline. And a water outlet of the sediment pool system is communicated with a water inlet of the sewage treatment system through a sediment pool chemical washing pipeline. The water outlet of the chemical washing pool is communicated with the grey water operation pipeline through a first overline, and a first valve is arranged on the first overline. The grey water operation pipeline and the sediment pool chemical washing pipeline are communicated through a second overline, and two second valves are arranged on the second overline. A sixth valve and a seventh valve are