Cyclone sand removal system  
    It is an advanced equipment used in cyclone grit chamber. The equipment has good sand setting and sand washing effect, and is widely used in the pre-treatment process of urban hotels, factories, mines, enterprises and institutions and urban large, medium and small sewage treatment projects.           
    The decontamination machine of Cyclone sand removal system is composed of impeller, rotating shaft, motor, reducer and sand lifting system (pump lifting or air lifting). Due to the spiral movement of the sewage in the tank when the impeller rotates, and the swirling flow generated by the tangential entry of the sewage and the impeller, the sewage in the tank forms a vortex flow state. Under the conditions of appropriate blade pulp inclination and linear velocity, the sand particles in the sewage will be washed and still maintain a strong sand setting effect, while the organic substances originally attached to the sand particles and substances with small weight flow out of the swirling tank with the sewage. In addition, due to the rotation of the impeller, the sensitivity of the cyclone tank to the change of flow pattern caused by the change of water inflow is reduced, so the effect of the grit chamber is stable and the organic composition of sand production is low.
working principle
1. Working principle of Cyclone sand removal system  
    There are two types of Cyclone sand removal system: flat bottom circular tank and cone bottom circular tank. There is a sand storage bucket in the center of the tank bottom, and a desander is set in the tank. The desander is composed of driving device, mixer and sand suction system, which is matched with the subsequent sand water separator to form a complete set of sand removal treatment equipment. After passing through the flat and straight inlet channel, the inlet turbulence is reduced to low, and the end of the inlet channel is a slope that can produce wall attachment effect, Part of the sand settled in the channel can enter the grit chamber along the slope. A baffle plate (only installed in the small pool) is set at the water inlet to bend the water flowing out of the plate down to the bottom plate of the selected area. The axial-flow mixer brings the water flow to the center of the tank and then upward to form a vortex water flow. The heavier sand particles fall into the sand collecting area at an annular orifice near the center of the tank. The sand entering the sand bucket can be sucked by air or discharged by pump, while the lighter organic matter separates the organic matter from the sand particles due to the shear effect of the mixer on water, and is finally led to the outlet channel with the axial water body.
2. Working principle of axial flow mixer  
    The rotation of the axial-flow mixer helps to guide the sand before entering the sand storage bucket and wash the sand for many times. The rotating blade can improve the flow state of water. The leading edge of the mixer blade is made into a large and round shape (the mixer diameter can be designed and manufactured according to the size of the tank), which can prevent floc distribution and winding of fibrous substances in the water. Characteristics of Cyclone sand removal system
1. Compact structure, small floor area and less equipment investment;
2. Reasonable structure, low maintenance rate, low energy consumption, convenient operation management and maintenance;
3. The equipment has strong corrosion resistance and long service life;
4. The process layout is flexible and convenient, easy to match and combine, and adapt to the needs of construction in different periods of the project;
5. The sand setting effect is good, and the removal of inorganic sand and gravel in the water source is particularly significant;
6. With high degree of automation, it can be controlled in many ways, and can also be controlled uniformly with other equipment in the same process
Technical parameters (unit: m) Suitable for bell type and Bi type grit chamber With the design of mixing impeller, the strong radial flow makes the sand fall to the pool wall and slide to the sand pit under the action of centrifugal force You can choose one of two sand discharge methods: air lift or pump suction The speed of the mixer can be adjusted to optimize the operation parameters
Optional materials:
carbon steel epoxy anticorrosion, carbon steel hot-dip galvanizing, stainless steel SS304 or SS316L
Outline diagram:
Cyclone grit chamber air lift sand remover: Cyclone grit chamber pump sand extractor: