Spot Screw Press Dewatering Equipment Machine System With Activated Sludge Process

Spot Filter Press Screw Press 201 Industrial Sewage Treatment Equipment Automatic Screw Screw Sludge Dewater​

The stacked screw sludge dewatering machine uses the principle of screw extrusion, through the strong extrusion force generated by the change of screw diameter and pitch, as well as the tiny gap between the moving ring and the fixed ring, to realize the extrusion and dehydration of sludge. A new type of solid-liquid separation equipment.

Filtration equipment first appeared during the European Industrial Revolution in the nineteenth century. The earliest industrial filtration equipment that came out included filter presses, leaf filters and spiral filters. Spiral filter, also known as screw extrusion dehydrator, first appeared in Germany in the 1960s, and then the former Soviet Union, Sweden, the United States and other countries also successively manufactured this kind of filter, and it was first used in oil extraction and fish grinding. In recent years, it has been widely used in the fields of sludge dehydration and other industrial process dehydration in the dehydration of minced meat, fish and shrimp waste filtration.
In the early days, the spiral filter found such a situation when filtering wastes such as fish and shrimp. At the beginning of filtration, the feed was squeezed and the filtrate flowed out of the filter screen. However, after a period of filtration, the filtrate will stop flowing, and the filter cake will not be discharged from the discharge port.
With the development of spiral filtration technology, in order to avoid the problem of clogging, a relatively new filter structure appeared in Germany and other European countries in the 1970s, such as grid filter structure, dynamic fixed ring filter structure, etc. Among them, the movable and fixed ring structure filter screen is covered with multiple ring pieces on the screw shaft, and the ring pieces are divided into two types: fixed ring pieces and movable ring pieces. The fixed ring and the movable ring are spaced apart from each other and have a certain filtering gap. The friction between the movable ring and the fixed ring can produce a friction force that promotes the extrusion of the material more than hinders it, thereby improving the filtering and separating effect of the material and avoiding the need for Clogging phenomenon of high viscosity materials [2].
For example, the spiral filter equipment with dynamic and fixed ring filter screen structure produced by Darmstadt University of Technology in Germany, FAN Company and LYCO Company in the United States, which is suitable for fishing, farms and other fields - the prototype of the laminated spiral sludge dewatering machine has been launched. , which can well avoid the problems caused by blockage, and therefore began to be promoted in Japan, South Korea and other countries with developed fishery and food industries.
Laminated spiral sludge dewatering machines have also been developed, innovated and popularized in my country. Due to the characteristics of easy separation and no clogging, laminated spiral sludge dewatering machines have been widely used in municipal sewage treatment and industrial wastewater treatment, petrochemical industry. , medicine, textile, metallurgy, food and beverage, mining and many other fields.
With the development of various new materials and control technologies, some domestic companies have also carried out some innovations and improvements on the basis of this, such as the improvement of the screw shaft, the non-wear structure, the industry-specific models, etc. [3] .