Inclined Tube Settlers: A Comprehensive Guide to Their Working Principle and Applications

Principle of the inclined tube settler: The inclined tube and inclined plate sedimentation water purification method is to put the sludge above the suspended layer and install the inclined tube and inclined plate with an inclination angle of 60 degrees, so that the suspended solids and debris in the raw water can be The surface of the bottom side of the inclined pipe accumulates to form a thin mud layer, which slides back to the mud suspension layer under the action of gravity, and then sinks into the mud collecting hopper. Then discharge it, either directly or for reuse.

Sedimentation tank: A structure that uses gravity to settle and remove suspended solids in water.

Inclined pipe: A sedimentation device developed in theory in shallow ponds. It is widely used in water treatment and is discharged from the sludge pipe into the sludge tank for treatment or comprehensive utilization. The clean water above gradually rises to the collecting pipe sedimentation tank. Inclined pipes are mainly used for sand removal at water inlets in water supply and drainage projects, industrial and domestic water sedimentation, sewage sedimentation, oil separation and tailings concentration treatment. They can also be used for the renovation of old pools. It is currently the most widely used and mature water treatment device in water supply and drainage projects. It is assembled from corrugated sheets to form a honeycomb-shaped inclined tube with an oblique length of 1 meter, an inclination of 60 degrees, and a generally hexagonal cross-section. The material is ethylene-propylene copolymer or polypropylene and other engineering materials. ​

Main features:

1. Large wetted perimeter and small hydraulic radius. ​

2. The laminar flow state is good and the particle settlement is not disturbed by turbulent flow. ​

3. When the length of the inclined pipe is 1 meter, the effective load is designed to be 3-5 tons/m2·hour. vo is controlled within the range of 2.5-3.0 mm/second, and the effluent water quality is the best. ​

4. Use fiberglass honeycomb inclined pipe at the water inlet. When the pipe length is 2-3.0 meters, it can operate safely in high turbidity with mud and sand content of 50-100 kg/m3. ​

5. The processing capacity of the inclined tube sedimentation tank is 3-5 times that of the advection sedimentation tank, and the accelerated clarification tank and pulse clarification tank are twice as much. It is the most widely used and mature water treatment device in water drainage projects.

Advantages of inclined tube and inclined plate sedimentation:

1. Simple structure, no wearing parts, durable, and reduced maintenance.

2. Stable operation and easy operation.

3. Less power and energy saving.

4. Save space, less investment, fast start-up and high efficiency.

Purpose of Inclined Tube and Inclined Plate Sedimentation Tank: Inclined tube and inclined plate sedimentation tank can be used as supporting system equipment for water treatment processes such as air flotation and upgrading methods, and can treat the following types of sewage, such as.

1. The removal rate of mixed wastewater containing various metals, chromium, copper, iron, zinc and nickel in electroplating wastewater can be above 93%, and it can reach the discharge standard after being treated in the inclined tube and inclined plate sedimentation tank.

2. Coal mine and wastewater can reduce the turbidity from 600-1600 mg/L to 5 mg/L.

3. The color removal rate of printing and dyeing, bleaching and dyeing and other industrial wastewater is 70-90%, and the COD removal rate is 50-70%. 4. For wastewater from leather, food and other industries, the COD removal rate can reach 60-80%, and the removal rate of impurity solids is more than 95%.

5. The COD removal rate of chemical wastewater is 60-70%, the color removal rate is 60-90%, and the suspended solids can all meet the discharge standards.