The origin and development of stacked screw sludge dewatering machine
- 2019-10-17-

The stacked screw sludge dewatering machine can be widely used in municipal sewage treatment projects and water treatment systems in petrochemical, light industry, chemical fiber, paper, pharmaceutical, leather and other industrial industries. The actual operating conditions have proved that the stacked screw sludge dewatering machine can create considerable economic and social benefits for customers. Today, I will introduce the origin and development of the stacked screw sludge dewatering machine.

Filtration equipment appeared early in the European industrial period of the nineteenth century. The industrial filtration equipment that came out early included filter presses, leaf filters and spiral filters.

Spiral filter, also known as screw extrusion dehydrator, first appeared in Germany in the 1960s, followed by Sweden, the United States, etc. also successively manufactured this kind of filter, and early used in the oil press and fish meat after the crushed meat press In the field of dehydration, fish and shrimp waste filtration, it has been widely used in the fields of sludge dehydration and other industrial process dehydration in recent years.

In the early days, the screw filter discovered such a situation when filtering waste materials such as fish and shrimp. At the beginning of the filtration, the feed was squeezed and the filtrate flowed out of the filter. But after filtering for a period of time, the filtrate stops flowing, and the filter cake will not be discharged from the discharge port. The main reason is that the material concentration increases, and the filter efficiency is reduced due to the filter mesh structure and clogging occurs.

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 Europe in the 1970s, such as grid filter structure, moving and fixed ring filter structure. Among them, the dynamic and fixed ring structure filter screen is covered with multiple ring pieces on the spiral 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 separated from each other and have a certain filtering gap. Through the friction of the material between the movable ring and the fixed ring, the friction force that promotes the extrusion of the material is greater than the hindrance, thereby improving the filtering and separating effect of the material and avoiding Blocking of high-viscosity materials.

For example, the moving and stationary ring filter structure spiral filter equipment produced by Darmstadt University of Technology in Germany, FAN Company and LYCO Company in the United States suitable for fishery, farms and other fields-the prototype of the stacked screw sludge dewatering machine has begun to be launched. It can well avoid the problems caused by congestion, and because of this, it has begun to be promoted in Japan and South Korea where the fishery and food industries are developed.

In recent years, the stacked screw sludge dewatering machine has also been developed, developed and promoted in our country. Due to the easy separation and non-clogging characteristics of the stacked screw sludge dewatering machine, it has been widely used in municipal sewage treatment and industrial wastewater treatment. , Petrochemical, pharmaceutical, 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 made some improvements and improvements on the basis, such as improvements to screw shafts, wear-free structures, and industry-specific models.