Working Principle
The working principle of the decanter centrifuge is based on centrifugal sedimentation, whereby solid-liquid separation is achieved under the action of centrifugal force by means of differential rotation between the drum and the screw conveyor. Specifically, when the sewage sludge mixture is introduced into the centrifuge, due to the centrifugal force, the heavier solid particles will be deposited on the wall of the drum to form a sediment layer, while the lighter liquid will form an inner liquid ring. Subsequently, a screw conveyor continuously pushes the deposited solid particles towards the conical end of the drum, where they are eventually discharged through a slag outlet. Meanwhile, the liquid is continuously overflowed through the overflow port at the large end of the drum, realizing solid-liquid separation.
Structural characteristics
1. Drum: the drum is the key component of the centrifuge, its speed and diameter have an important impact on the separation effect, the drum is usually made of high-strength materials to withstand the centrifugal force generated by high-speed rotation.
2. Screw conveyor: Screw conveyor and drum maintain a certain differential speed rotation, in order to push the deposited solid particles to the slag outlet. Its structure and material selection are crucial to the centrifuge’s operational stability and separation effect.
3. Differential speed system: the differential speed system is the key component to control the differential speed between the drum and the screw conveyor, and its precision and stability directly affect the separation effect and the operating efficiency of the equipment.
4. Drive system: the drive system provides power for the centrifuge, usually including motor, reducer and other components. Its performance and stability have an important impact on the overall operating effect of the centrifuge.
5. Control system: modern sewage decanter centrifuges are usually equipped with advanced control systems, which can realize automated control and remote monitoring to improve the operational efficiency and reliability of the equipment.
Application Advantages
1. High-efficiency separation: Decanter centrifuge can realize high-efficiency solid-liquid separation and improve the efficiency and quality of sewage treatment.
2. Continuous operation: the equipment can continuously feed separation, washing and unloading under full-speed operation, without stopping the operation, which improves the working efficiency.
3. Strong adaptability: Decanter centrifuge is suitable for treating sewage sludge mixtures of various concentrations and particle sizes, with strong adaptability.
4. Smooth operation: the equipment structure is reasonably designed, smooth and reliable operation, reducing the failure rate and maintenance costs.
5. Environmental protection and energy saving: the decanter centrifuge for sewage treatment does not need to add a large number of chemicals in the treatment process, reducing secondary pollution and energy consumption.
Selection precautions
When purchasing a decanter centrifuge for sewage treatment, you need to pay attention to the following aspects.
1. Treatment capacity:According to the scale of the sewage treatment plant and the treatment capacity needs to choose the right model of equipment.
2. Separation effect: pay attention to the separation effect of the equipment and solid phase recovery rate and other indicators to ensure that they meet the treatment requirements.
3. Energy consumption and maintenance costs: consider the energy consumption and maintenance costs of the equipment, choose low energy consumption, easy maintenance equipment.
4. Brands and manufacturers: choose well-known brands and manufacturers with rich production experience to ensure the quality of equipment and after-sales service.
Sewage treatment decanter centrifuge is an efficient, stable and reliable solid-liquid separation equipment, which has a wide range of application prospects in the field of sewage treatment.