Inclined plate sedimentation tank

Principle of inclined tube settler

The inclined tube sedimentation purification method is a method of constructing inclined tubes with an inclination angle of 60 degrees above the suspended layer of sludge. Suspended solids, solids, or flocs formed by adding coagulants in the original water accumulate on the bottom surface of the inclined tubes to form a thin layer of sludge, which slides back to the suspended layer of sludge by gravity and then sinks into the sludge collection hopper. Discharged into the sludge tank through the sludge discharge pipe for further treatment or comprehensive utilization. The supernatant gradually rises to the collection pipe and can be discharged directly or reused.

Design parameters of inclined tube settler

(1) The spacing between inclined pipes (plates) is generally not less than 50mm, and the length of inclined pipes (plates) is generally around 1.0-1.2m;

(2) The upper layer of the inclined pipe 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 pipe (plate) 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 pipe (plate) is at a 60 ° angle to the horizontal plane; The aperture of the angle and inclined tube is generally 80-100mm.

Application of inclined tube settler

The inclined tube settler can be used as a supporting equipment for water processes such as air flotation and upgrading, as well as for single-stage treatment of various types of wastewater. For example. 1. The removal rate of mixed wastewater containing various metal ions, such as copper, iron, zinc, nickel, etc., in electroplating wastewater is over 90%. Generally, electroplating wastewater can meet the discharge standards after treatment. 2. Coal mine and mineral processing wastewater can reduce turbidity from 500-1500 milligrams per liter to 5 milligrams per liter. 3. The color removal rate of wastewater from printing and dyeing, bleaching and dyeing is 70-90%, and the COD removal rate is 50-70%. 4. The removal of a large amount of organic matter from wastewater in industries such as leather and food, with a COD removal rate of 50-80% and a solid impurity removal rate of over 90%. 5. The COD removal rate of chemical wastewater is 60-70%, the chromaticity removal rate is 60-90%, and the suspended solids meet the discharge standards.

Scope of use of inclined tube settler:

The sedimentation device is equipped with many parallel inclined plates with small intervals or parallel inclined pipes with small diameters, which improves the sedimentation effect and water yield, especially for the removal of dispersed particles. This device is widely used for the treatment of industrial wastewater, domestic wastewater, and non-ferrous metal processing wastewater. The treatment of hydraulic dust removal wastewater in the boiler room of the power plant, the treatment of washing water in the gas station, the treatment of biochemical water, and the pretreatment of feedwater purification. It has significant advantages in both new sedimentation tanks and the renovation of old tanks, and is suitable for installation and use in various water supply and drainage sedimentation tanks.

Advantages of inclined tube sedimentation device

1. Simple structure, no vulnerable parts, durable, and reduces maintenance.

2. Stable operation and easy operation.

3. Less power and energy-saving.

4. Land saving, low investment, fast deployment, and high efficiency.

Installation and use:

1. During the installation of inclined pipes, methods such as adhesive or electrical bonding should be used to bond and fix them. Parallel inclined plates are fixed with support frames, while corrugated inclined plates are fixed with through screws.

During installation, the tilt direction should not cause the water flow to directly hit the inclined pipe (plate).

3. Regular flushing, reasonable management, and reduction of blockage caused by biofilm overgrowth.

4. The inclined pipe (plate) plane shall not bear concentrated loads.

5. Do not use open flames in areas where inclined pipes (plates) are installed.