What are the process characteristics and concentration methods of sludge thickener?

The sludge thickener adopts stepless speed regulation, flexible operation and simple and convenient maintenance. The common concentration methods include air flotation concentration method, gravity concentration method, centrifugal concentration method and belt gravity concentration method. The following is a detailed introduction to "process characteristics and concentration methods of sludge thickener".

1、 Process characteristics of sludge thickener

1. The residence time of sludge thickening is short. The residence time of traditional sludge thickening tank is generally more than 10 hours, while the dehydration residence time of belt thickening section is only tens of seconds to 1-2 minutes on average.

2. The belt concentration section is designed as an inclined type, which increases the static pressure head of the feed part and improves the dehydration efficiency.

3. Stepless speed regulation is adopted in the concentration section and pressure filtration section for better process matching.

4. Filter cloth deviation correction device: the sludge thickener adopts pneumatic feedback single side automatic deviation correction.

5. Filter cloth cleaning device: the sludge thickener adopts rate nozzle and washing mechanism for automatic cleaning.

6. Filter cloth tensioning device: the sludge thickener adopts pneumatic tensioning, so the operation is flexible and the maintenance is simple and convenient.

2、 Thickening method of sludge thickener

1. Air flotation concentration method

Air flotation concentration is a method to release the gas dissolved in water in the form of micro bubbles, and can quickly and evenly adhere to the sludge solid particles, so that the density of solid particles is less than that of water and float upward, so as to achieve the separation of solid particles and water.

2. Gravity concentration method

Gravity concentration makes use of the relative density difference between solid particles and water in sludge to realize sludge concentration. If gravity concentration method is adopted, the water content can be reduced from 99,2% - 99,6% to 97% - 98% For the sewage treatment plant with primary sedimentation tank and secondary sedimentation tank, the two kinds of sludge can be mixed for gravity concentration.

3. Centrifugal concentration method

The principle of centrifugal concentration method is to concentrate by using different centrifugal force due to different specific gravity of solid and liquid in sludge. It is suitable for biological and chemical sludge of large and medium-sized sewage treatment plants.

4. Belt gravity concentration method

Belt gravity concentration method is a mechanical concentration method using belt gravity thickener. During operation, it will be affected by macromolecules in sludge, and the humidity is high, so it needs to be operated carefully.

The above is the introduction of "process characteristics and concentration methods of sludge thickener". Please feel free to contact us if you have any questions.