1、 Introduction:
The inclined tube sedimentation tank refers to a sedimentation tank with inclined tubes installed in the sedimentation area. There are two types of assembly forms: inclined pipes and branch pipes. Using inclined parallel sedimentation in the sedimentation zone of a horizontal or vertical sedimentation tank
The pipe or parallel pipeline (sometimes using honeycomb packing) is divided into a series of shallow sediment layers, and the treated and settled sediment moves and separates from each other in the shallow sediment layers. According to their mutual motion directions, they can be divided into three different separation methods: reverse (opposite) flow, same direction flow, and lateral flow. Every two parallel inclined plates (or inside parallel pipes) is equivalent to a very shallow sedimentation tank.
2、 Advantages:
① By utilizing the principle of laminar flow, the processing capacity of the sedimentation tank has been improved;
② Shortened the settling distance of particles, thereby shortening the settling time;
③ The sedimentation area of the sedimentation tank has been increased, thereby improving the treatment efficiency.
3、 Design parameters:
(1) The spacing between inclined plates (pipes) is generally not less than 50mm, and the length of inclined plates (pipes) is generally around 1.0-1.2m;
(2) The upper layer of the inclined plate should have a water depth of 0.5-1.0m, and the height of the bottom buffer layer should be 1.0m. Under the inclined plate (pipe) is the wastewater distribution area, generally not less than 0.5m in height, and the lower part of the water distribution area is the sludge area;
(3) Multiple rows of perforated pipes are generally used to collect water from the pool, and the holes should be 2cm below the water surface to prevent floating objects from being carried away;
(4) The flow rate of wastewater in the inclined pipe depends on different types of wastewater, such as treating domestic sewage, with a flow rate of 0.5-0.7mm/s.
(5) The inclined plate (pipe) forms a 60 ° angle with the horizontal plane, and the clear distance between the inclined plate (or inclined pipe aperture) is generally 80-100mm.