Screw stack sludge thickener

The spiral stacking sludge thickener is a sludge thickening equipment based on the principle of screw pressing. It is mainly used to concentrate and reduce the sludge generated in the process of various sewage or wastewater treatment, reduce its water content, and prepare for further dehydration treatment (such as sludge dehydrator) or subsequent disposal (such as composting, incineration, landfill, etc.). The spiral stacking sludge thickener is widely used in municipal sewage treatment, industrial wastewater treatment, food processing, chemical industry, breeding and other fields due to its compact structure, continuous operation and high degree of automation. The following is a detailed introduction to the working principle, main structure, characteristics and applicable scope of the spiral stacking sludge thickener: Working principle of spiral stacking sludge thickener The spiral stacking sludge thickener is mainly composed of spiral shaft, dynamic and static ring pieces, fixed ring, movable ring, driving device, flocculation mixing tank, self-cleaning device and other components. 1. Flocculation mixing: The sludge is first fully mixed with an appropriate amount of flocculant in the flocculation mixing tank, so that the sludge particles form larger flocs through flocculation, which improves the subsequent dehydration effect. 2. Screw conveying: The mixed sludge is pumped into the main part of the spiral stack through the sludge pump and transported forward along the spiral shaft. The spiral shaft is provided with dynamic and static ring pieces with a certain spacing, forming a continuous and gradually shrinking spiral space. 3. Extrusion and concentration: Under the push of the spiral shaft, the sludge flocs are subjected to the dual extrusion of the dynamic and static ring pieces in the spiral cavity. The gap between the dynamic and static ring pieces gradually decreases, which produces continuous and increasing axial pressure and radial extrusion force on the sludge, forcing the water in the sludge to be squeezed out through the gap between the ring pieces to achieve sludge concentration. 4. Self-cleaning: The unique spiral structure and ring piece design inside the spiral stack body enable relative movement between the ring pieces during the sludge conveying process, forming a self-cleaning mechanism similar to the "scraper" effect, effectively preventing sludge blockage and keeping the equipment running smoothly. Main structure of spiral stack sludge thickener - Spiral shaft: core component, driving the sludge forward and providing axial pressure. - Dynamic and static ring pieces: constitute the spiral cavity, and realize sludge extrusion and self-cleaning through relative movement. - Driving device: Provides power to drive the spiral shaft to rotate. - Flocculation mixing tank: Pre-treats the sludge and mixes it evenly with the flocculant. - Self-cleaning device: Assists in cleaning the surface of the ring sheet to prevent clogging. Features of spiral stacking sludge thickener 1. Continuous operation: The equipment can achieve 24-hour continuous operation without manual intervention and has strong adaptability. 2. Small footprint: Compact structure and small size, easy to install in a small space. 3. Low energy consumption: Adopts low-speed spiral extrusion technology, low energy consumption and economical operating cost. 4. No clogging: The unique dynamic and static ring sheet design has good self-cleaning ability and is not prone to clogging. 5. Wide adaptability: It can handle sludge with a wide range of solid content (generally 0.8%-10%) and has a certain tolerance to changes in sludge properties. 6. High degree of automation: It can realize functions such as automatic sludge feeding, automatic dosing, and automatic sludge discharge, and is easy to operate and maintain. Application scope of spiral stacking sludge thickener 1. Municipal sewage treatment: suitable for sludge thickening in urban sewage treatment plants, including primary sludge, residual sludge, chemical sludge, etc. 2. Industrial wastewater treatment: in the wastewater treatment process of chemical, papermaking, leather, printing and dyeing, food, electroplating, pharmaceutical and other industries, the sludge produced is concentrated. 3. Food processing: such as organic sludge concentrated by slaughterhouses, fruit and vegetable processing, dairy processing, etc. 4. Breeding industry: Concentrate and reduce the volume of fecal sludge produced by livestock farms. In summary, the spiral stacking sludge thickener has become an indispensable and efficient thickening equipment in the field of modern sludge treatment by virtue of its unique working principle, structural characteristics and wide range of applications. In practical applications, the spiral stacking sludge thickener should be reasonably selected and configured in combination with factors such as sludge characteristics, treatment scale, site conditions, etc., so as to achieve efficient and stable operation of the sludge treatment system.