Horizontal Spiral Discharge Decanter Centrifuge Series

Product Description

A decanter centrifuge is a horizontal spiral discharge, continuously operating sedimentation device. The working principle of this type of centrifuge is as follows: the drum and the screw rotate at a certain differential speed in the same direction at high speed. The material is continuously fed into the inner cylinder of the conveying screw through the feed pipe, accelerated, and then enters the drum. Under the centrifugal force field, the heavier solid phase deposits on the drum wall to form a slag layer. The conveying screw continuously pushes the deposited solid phase to the conical end of the drum, where it is discharged through the slag outlet. The lighter liquid phase forms an inner liquid ring and continuously overflows from the large end overflow port of the drum, then is discharged through the liquid outlet.
This machine can continuously feed, separate, wash, squeeze, and discharge while operating at full speed. It features a compact structure, stable continuous operation, strong adaptability, high production capacity, and convenient maintenance.
It is suitable for separating suspensions with solid particle sizes greater than 0.005mm and concentrations ranging from 2-40%. It is widely used in industries such as chemical, light industry, pharmaceutical, food, and environmental protection.

Technical Features

1. Industrial Design
The entire machine follows and integrates industrial design concepts, emphasizing the stability of the main structure, the functionality of the host, and the overall safety of the machine. It effectively absorbs the dynamic load shear forces during operation.
2. Effective Avoidance of Dual-Rotor High-Speed Rotation Resonance Zones
Within the designed speed range, the machine operates without obvious first or second-order resonance phenomena. The overall vibration level at the bearing seat is controlled between 2mm/s and 4mm/s, avoiding additional damage to components caused by high-frequency vibration and beat vibration.
3. Complete Elimination of Liquid Ring Stall Phenomenon
The liquid ring stall phenomenon during heavy-load startup or shutdown is completely eliminated, thereby avoiding additional impacts on the main bearings, screw bearings, and rotating components caused by machine bouncing or severe shaking due to liquid ring stall, ensuring startup and shutdown stability.
4. Centrifugal Casting and Forging Processes for Component Raw Material Blanks
The raw material blanks for the main components of the machine are manufactured using centrifugal casting or integral mold forging processes, completely avoiding uncontrollable quality risks such as intergranular corrosion and residual stress release associated with traditional welding methods.
5. Host Bearing Selection
Original products from internationally renowned brands such as Sweden's SKF and Germany's FAG are selected.
6. Constant Temperature Inspection
All precision-machined components of the machine are inspected under constant temperature conditions to ensure that the actual machining quality meets the design accuracy requirements.

Application Areas

Primarily used for dewatering sludge generated during industrial and municipal wastewater treatment processes.
In today's world, environmental issues have become a global focus. Against this backdrop, the value of decanter centrifuges is fully demonstrated. Previously, wastewater treatment plants or related facilities relied on self-settling or belt filter presses for sludge dewatering and concentration. Tests have shown that reducing the moisture content of sludge from 98% to 70% can shrink its volume by 10 times. Because of this, decanter centrifuges, with their inherent advantages of large processing capacity, automated operation, and excellent dewatering performance, have been widely used and promoted in the field of environmental protection. Sales of decanter centrifuges alone account for about 50% of all centrifuge products, establishing their irreplaceable status.

They are widely used in industries such as solid-liquid separation, sludge dewatering, particle size classification, liquid phase clarification, polyvinyl chloride resin, power plant sludge, soy protein, ammonium sulfite, dyeing sludge, kaolin, peanut protein, calcium carbonate, papermaking sludge, starch, fruit juice, calcium carbonate, natural gas desulfurization sludge, drilling mud, beverages, zinc sulfide, carbide sludge, coal flotation, vegetable oil, ammonium sulfate, fiberboard sludge, cryolite flotation, citric acid, calcium sulfate, drilling mud, diatomite, waste oil purification, starch, chlorine mud, gypsum, wash water purification, alcohol waste liquid, automotive sludge, bauxite, orange juice, PTA, activated sludge, clay, chlorine mud, blood meal, gypsum slurry, ore, alum sludge, and more.

Technical Features

1. Industrial Design
The entire machine follows and integrates industrial design concepts, emphasizing the stability of the main structure, the functionality of the host, and the overall safety of the machine. It effectively absorbs the dynamic load shear forces during operation.
2. Effective Avoidance of Dual-Rotor High-Speed Rotation Resonance Zones
Within the designed speed range, the machine operates without obvious first or second-order resonance phenomena. The overall vibration level at the bearing seat is controlled between 2mm/s and 4mm/s, avoiding additional damage to components caused by high-frequency vibration and beat vibration.
3. Complete Elimination of Liquid Ring Stall Phenomenon
The liquid ring stall phenomenon during heavy-load startup or shutdown is completely eliminated, thereby avoiding additional impacts on the main bearings, screw bearings, and rotating components caused by machine bouncing or severe shaking due to liquid ring stall, ensuring startup and shutdown stability.
4. Centrifugal Casting and Forging Processes for Component Raw Material Blanks
The raw material blanks for the main components of the machine are manufactured using centrifugal casting or integral mold forging processes, completely avoiding uncontrollable quality risks such as intergranular corrosion and residual stress release associated with traditional welding methods.
5. Host Bearing Selection
Original products from internationally renowned brands such as Sweden's SKF and Germany's FAG are selected.
6. Constant Temperature Inspection
All precision-machined components of the machine are inspected under constant temperature conditions to ensure that the actual machining quality meets the design accuracy requirements.