Screw stack sludge dewatering machine

The spiral stack sludge dewatering machine is an innovative sludge treatment equipment. With its unique spiral shaft and lamination structure, it realizes continuous, automatic and low-energy dewatering of sludge. Its working principle mainly includes the following aspects: 1. Structural features - spiral shaft: The core component of the spiral stack sludge dewatering machine is a shaft with spiral blades, which is driven by a motor to rotate. - Laminations: The spiral shaft is wrapped with one or more layers of laminations made of stainless steel sheets. These laminations are closely interlaced with each other to form a continuous filtering space. - Fixed ring and movable ring: There are fixed rings and movable rings on both sides of the lamination, and a certain gap is formed between the two. This gap gradually decreases with the operation of the equipment, realizing the progressive squeezing and dehydration of the sludge. 2. Working process - sludge transportation and concentration: The sludge to be treated enters the equipment through the feed port and moves forward under the push of the spiral shaft. In the early stage, the gap between the laminations is large, and the sludge is initially dehydrated by gravity to achieve initial concentration. - Screw pressing and dewatering: As the sludge moves toward the outlet of the equipment, the gap between the laminations gradually decreases, exerting an increasing squeezing force on the sludge. At the same time, the spiral blades exert a dual squeezing effect on the sludge in the axial and radial directions, forcing the water in the sludge to be discharged through the gaps between the laminations. Due to the unique design of the laminations, the sludge is not easy to be blocked during the squeezing process, and the dewatering effect is gradually enhanced. - Self-cleaning function: The spiral sludge dewatering machine also has a self-cleaning function. The relative movement between the movable ring and the spiral shaft allows the laminations to be constantly refreshed to prevent sludge blockage, ensuring the stable operation of the equipment and continuous dewatering effect. At the same time, part of the cleaning water will be periodically sprayed on the surface of the laminations to further remove possible residual sludge and maintain the good filtration performance of the laminations. - Dewatered mud cake discharge: After sufficient squeezing and dehydration, the sludge forms a dry and hard mud cake, which is discharged from the mud discharge port at the end of the equipment. The dehydrated mud cake has a low moisture content and a greatly reduced volume, which is convenient for subsequent treatment or disposal. 3. Features and Advantages - Continuous operation: The spiral stack sludge dewatering machine can realize continuous feeding, continuous dewatering, and continuous sludge discharge. It does not need to stop frequently to clean the filter belt like the traditional belt dewatering machine, which improves the work efficiency. - Low energy consumption: The equipment has low operating power and does not require large auxiliary equipment such as high-pressure pumps, so the energy consumption cost is low. - Small footprint: The equipment is compact, simple in structure, occupies a small space, and is suitable for various site conditions. - Strong adaptability: It is suitable for dewatering various types of sludge such as oily sludge, viscous sludge, organic sludge, etc., and has strong adaptability to sludge concentration fluctuations. - Easy maintenance: There are no wearing parts such as filter cloth and filter belt, the maintenance workload is small, and the service life is long. In summary, the spiral stack sludge dewatering machine has achieved efficient, energy-saving and continuous dewatering of sludge with its unique structural design and working principle, and has become a widely used equipment in the field of modern sludge treatment.