Rain-dirt separation device and rain-dirt separation method

Abstract

The invention relates to the field of a solid-liquid separation technology, specifically to a rain-dirt separation device and its rain-dirt separation method. The method comprises the following steps: a, interflowing sewage enters a cylindrical swirling barrel, flows along the swirling channel and flows along the curved surface of the barrel under tangential acceleration out of an outlet at the bottom; b, the interflowing sewage which undergoes the swirling rotates violently such that heavier foreign materials and particles are aggregated to the center of the eddy flow and are sunken to the bottom of a fine filter cylinder and a clear liquid part flows out of fine filter screen holes at the side wall of the fine filter cylinder; and c, heavier foreign materials and particles enter a coarse filter basket so as to intercept large pieces of foreign materials. According to the invention, dirty rainwater is directly divided into two streams and a pile of foreign materials, namely about 90% of clear rainwater, about 10% of silt-containing sewage and large pieces of foreign materials. And then, separated rainwater enters a river. Thus, pollution load is mitigated greatly, and treatment cost of a sewage plant is low.

Description

[technical field] [0001] The invention relates to the technical field of solid-liquid separation, in particular to a rain-stain separation device and a rain-stain separation method arranged in a municipal pipe network for automatic diversion and digestion of sewage containing dirt, impurities and oil. [Background technique] [0002] During the reconstruction and treatment of rivers in coastal tourist areas, the amount of waste water often increases due to the peak tourist season and rainy season, and is discharged into the river along with the rainwater. In addition, some small seafood processing factories around will also discharge oily sewage into the pipeline, so that The river water was black, the silt at the bottom of the river was thick and smelly, tourists and residents complained a lot about the environment. [0003] Although a sewage treatment plant has been built nearby, due to the large amount of water, the sewage plant has no time to treat it. The existing techno...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of grille cleaning before being discharged into the river is that it can only remove some of the debris (such as large floating debris) but cannot remove oil and control flow, so it will also cause river water pollution;

[0005] The disadvantage of direct discharge to the sewage plant is that the load of the sewage plant is increased, the power consumption is increased, the operation loss of mechanical equipment, the operators are time-consuming and labor-intensive, and it is too late to process during periods of heavy rainfall

Images