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What industry is the decanter centrifuge used for? Decanter centrifuge working principle：Centrifuges are useful in most industries where solids, liquids, and gases are mixed into a single substance, but separating the components is necessary. For example, decanters (also known as solid bowl centrifuges) continuously separate solids from liquids in slurries and therefore play an essential role in wastewater treatment, chemical, petroleum, and food processing industries. The basic principle of a decanter centrifuge relies on buoyant separation. The denser ingredients will fall to the bottom of the mixture while the less dense ones are suspended above. Due to a large centrifugal force, decanters rotate to separate the substances inside quickly. Before decanters were used, components took hours to settle, but a decanter centrifuge can take only a few seconds.
In recent years, with the vigorous development of environmental protection, the sewage treatment capacity of horizontal spiral centrifuges in cities has also been continuously strengthened. Therefore, there are many applications in municipal sewage treatment and sludge dewatering. It has the characteristics of good separation effect, small footprint, high work efficiency, and is very popular among manufacturers in sewage treatment. Therefore, the following is a brief analysis of the main factors that affect the sludge dewatering effect of centrifuges. First, let’s introduce sewage treatment and processes: There are primary treatment, secondary treatment, and advanced treatment levels for sewage treatment. The composition of sewage treatment process is divided into two stages. Physical treatment section and biochemical treatment section.
The materials then flow into the inner cavity of the bowl, which rotates in synchronization with the bowl. Because of their different specific gravities, the three types of centrifugal forces are as follows: the strongest for solids, the second strongest for heavy-phase liquids (like water), and the weakest for light-phase liquids (like oil). This allows the centrifugal force to work magic, forming an outer solid layer and two inner liquid layers. The solid material that has been deposited on the inside wall of the bowl is moved to the machine’s solid outlet using the screw, where it is dried further using extrusion and subsequently released. Meanwhile, the liquid material flows to the machine’s liquid phase outlet and overflows at various points, separating the solid, heavy, and light liquid phases. The Shenzhou Machinery 3-phase decanter centrifuge uses centripetal pump technology to determine the optimal placement of the liquid discharge layer based on the relative proportions of the heavy and light liquid phases and to adjust the position of the neutral layer of these phases. Additionally, the centripetal pump serves as the heavy liquid phase flow outlet, making it an ideal choice for pipeline layout.
Disc stack centrifuge is a kind of vertical centrifuge.As a high efficiency,high output,high automation and high-speed precision separation equipment,it can be divided into solid-liquid two phase and solid-liquid-liquid three phase separation,As a two phase separation disc centrifuge,it can separate most solid particles and liquids,As a three phase disc centrifuge,it can separate liquid phase of different densities and separate solids at the same time. It can separate suspensions with a solid concentration of less than 5%. The technical parameter range of disc centrifuge is relatively large, and the diameter of the drum is generally 150 ~ 730 mm. The disc centrifugal separator can provide a better result of separation with a clearer centrate, and can be adopted in more areas with its wide range of technical parameters. Read even more details at https://www.lnszjx.com/.
Rotary drum diameter. The diameter of the Decanter centrifuge is 180-920mm, which means that the theoretical volume separation range is 1:130 when the diameter to length ratio is the same. The diameter of a Decanter centrifuge cannot increase indefinitely, because as the diameter increases, the allowable speed will decrease due to the decrease in material strength, resulting in a corresponding decrease in centrifugal force. From an economic perspective, it is not possible to increase the flow rate of a Decanter centrifuge by increasing its diameter. The ratio of drum diameter to length. In the past, the aspect ratio remained at 1:2, but now it can reach 1:3 or 1:4 (or even higher). The diameter to length ratio has an impact on the residence time of materials in the clarification zone, as it determines the volumetric flow rate of the centrifuge. The diameter to length ratio does not have a significant impact on the solid flow rate, but it has an impact on the moisture content of the mud cake.