Symmetrical opposite three-dimensional circular-flow integration oxidation ditch

Abstract

The invention relates to a symmetrical opposite three-dimensional circular-flow integration oxidation ditch, comprising two air-lifting flow-pushing three-dimensional circular oxidation ditches. Each ditch body is provided with a horizontal clapboard, and each oxic zone and each anoxic zone are respectively arranged in each upper ditch and each lower ditch; one end of each horizontal clapboard isconnected with each inclined guide wall, and each transition anoxic zone is arranged at the other end of each horizontal clapboard; and each air-lifting oxic zone is arranged between each inclined guide wall and the end wall of each ditch body. The symmetrical opposite three-dimensional circular-flow integration oxidation ditch is characterized by being a rectangular integration oxidation ditch consisting of the two air-lifting flow-pushing three-dimensional circular oxidation ditches which have the same structure, are communicated by the transition anoxic zones and are opposite and symmetrical, wherein a double-shaft converter is arranged between the two horizontal clapboards and is lower than the horizontal clapboards; the two sides of the double-shaft converter are connected with horizontal rotating shafts along the horizontal direction of the ditch; a guide pulp board is arranged on the horizontal rotating shafts; and the top of the double-shaft converter is connected with a vertical rotating shaft driven by a reduction motor. The symmetrical opposite three-dimensional circular-flow integration oxidation ditch has the beneficial effects that a denitrification effect is improved, mud does not exist at the bottom of the ditch, water quality is stable, and the cost is low.

Description

technical field [0001] The invention relates to a sewage and waste water treatment facility, in particular to an oxidation ditch integrated with symmetrical opposite three-dimensional circulation flows. Background technique [0002] Oxidation ditch is a time-delayed aerated activated sludge water treatment process with complete mixing and integral plug-flow hydraulic characteristics. Sewage, waste water and activated sludge are mixed and circulated in a closed ditch-like channel. Due to its unique hydraulic characteristics of "closed circulation flow" and the characteristics of longer sludge age and lower organic load, it has good effluent quality, strong impact resistance, stable operation, low sludge discharge and one-time construction. The water treatment process with low investment and operating costs is widely used in urban sewage and industrial wastewater treatment. In the 1990s, the deep-ditch oxidation ditch represented by the technology of submerged thrusters combi...

AI Technical Summary

Problems solved by technology

Throughout the existing air-lift push-flow three-dimensional circulation oxidation ditch, there are still certain technical defects: mainly reflected in: (1) Because it is necessary to maintain a high circulation flow rate to ensure that there is no mud at the bottom of the ditch, resulting in denitrification process (2) Because the submerged depth of the aerator is directly proportional to the energy consumption, the height and length ratio of the three-dimensional circulating flow oxidation ditch of the air-lift plug flow is limited, and the volume of a single ditch is difficult to enlarge. As a result, when the amount of treated water is large, multiple ditches must be built together, which increases the cost of civil engineering; (3) the use of intermittent air supply microporous aerator groups makes the microporous aeration equipment vulnerable to damage and increases equipment costs; (4) adopts The solid-liquid separator is equipped with a flow tank to occupy the inner space of the device and reduce the sedimentation area, which affects the separation effect. At the same time, the construction installation cost is increased due to the relatively complicated structure.

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