As environmental pressures are increasing and industrial automation is being fully upgraded, solid-liquid separation equipment plays an increasingly critical role in many industries. Decanter centrifuges (also known as horizontal spiral sedimentation centrifuges) have become one of the core equipment in the field of solid-liquid separation due to their high degree of automation, strong processing capacity and wide range of adaptability.
As a Chinese company focusing on the research and development and manufacturing of decanter centrifuges, we position our products as “high efficiency, low energy consumption and strong adaptability” and are committed to providing reliable and intelligent solid-liquid separation solutions to global customers. This article will give you a comprehensive understanding of the powerful strength of decanter centrifuges from five aspects: technical principles, product advantages, typical applications, successful cases and purchasing recommendations.
Technical principle of horizontal screw centrifuge
The horizontal screw centrifuge is a continuous operation equipment based on the principle of centrifugal sedimentation. It generates strong centrifugal force through high-speed rotation to quickly separate the solid particles in the mixed liquid.
1. Workflow overview
Feeding: The material to be processed is fed into the drum by the conveying pump.
Separation: Under high-speed rotation, solid particles with high density are thrown to the inner wall of the drum to form a solid phase layer; liquid with low density moves toward the center to form a liquid phase layer.
Discharge: The speed difference of the screw conveyor relative to the drum is controlled by the differential. The screw continuously pushes the settled solids to the slag discharge port for discharge, and the liquid overflows and discharges from the other end to achieve solid-liquid separation.
2. Core structure
Drum: Made of stainless steel or duplex steel, it can withstand high-speed operation.
Screw conveyor: Built-in wear-resistant protective layer, responsible for continuously pushing solids.
Differential: Adjust the speed difference between the screw and the drum.
Drive system: Main motor + auxiliary motor combination to achieve stable power output.
Control system: PLC intelligent control, supporting remote control and fault diagnosis.
Advantages and characteristics of decanter centrifuge
Compared with traditional separation equipment such as filter press and belt filter press, decanter centrifuge has incomparable advantages in multiple dimensions:
1. Continuous operation and efficient processing
The equipment supports 24-hour continuous operation and is suitable for large-flow, continuous production lines; the separation process is completed automatically, greatly reducing manual intervention.
2. Strong adaptability and adaptability to a variety of materials
It can be widely used in municipal sludge, chemical waste liquid, food residue, papermaking black liquor, oil drilling fluid and other working conditions, especially good at handling suspended solids with high water content, low concentration or fine particle size.
3. High degree of automation
Equipped with advanced PLC control system and variable frequency drive, it can realize automatic start, automatic shutdown, online speed regulation, differential speed regulation, remote control and data acquisition.
4. Compact structure and convenient maintenance
The overall equipment is small in size, occupies a small area, and is flexible to install; the internal modular design is adopted, which is simple to maintain and easy to replace wearing parts.
5. Stable operation, energy saving and consumption reduction
The direct drive + frequency conversion control technology is adopted to effectively reduce energy consumption while ensuring processing efficiency, helping enterprises reduce operating costs.
Wide range of applications
1. Municipal sewage treatment
During the sludge dehydration stage, the decanter centrifuge can effectively reduce the sludge moisture content and improve the subsequent transportation and incineration efficiency. It is an ideal equipment to replace the plate and frame filter press.
2. Petroleum and drilling industry
Applicable to drilling fluid purification, oil sludge treatment, oily sludge dehydration, etc., especially the model with three-phase separation function can achieve solid, liquid and oil three-phase separation, and greatly recover useful oil.
3. Chemical and pharmaceutical industry
In the separation and treatment of chemical reaction liquid, pharmaceutical intermediates, fermentation liquid, etc., the decanter centrifuge can improve product purity and reduce waste.
4. Food and beverage processing
Such as starch production, juice clarification, soy product processing and other links, the decanter centrifuge can achieve rapid liquid clarification and solid concentration of materials.
Customer Case Sharing
Case 1: A large municipal sewage treatment plant
Problem: The original belt filter press frequently malfunctioned, with high labor costs and low dehydration efficiency.
Solution: We provided them with 2 LW450 decanter centrifuges with an automatic dosing system.
Results:
The sludge dehydration efficiency increased by 30%, and the moisture content dropped from 85% to about 70%;
Case 2: A starch company
Problem: The original separation equipment could not meet the demand for capacity growth, affecting product quality.
Solution: Configure LW520 decanter centrifuge to recover residual starch in waste liquid.
Results:
The recovery rate increased to more than 98%;
The operation was continuous and stable
Procurement Recommendations
1. Selection Basis
Processing capacity: According to the actual daily output, match the appropriate drum size and speed.
Material properties: such as viscosity, particle size, corrosiveness, etc., determine the equipment material and differential speed requirements.
Target requirements: such as moisture content after dehydration, separation accuracy, continuous operation time, etc.
2. Key parameter reference
Parameter Typical range
Drum diameter (mm) 250–650
Separation factor (G value) 1500–4000
Processing capacity (m³/h) 1–60
Main motor power (kW) 7.5–90
Material selection 304/316L/2205
The decanter centrifuge is not only a piece of equipment, but also a powerful assistant for enterprises to save energy, reduce emissions, improve quality and increase efficiency. As an experienced and technologically advanced Chinese manufacturer, we always adhere to the development concept of “customer demand-oriented and technological innovation-driven” to provide high-performance, cost-effective solid-liquid separation solutions for domestic and foreign users.
Whether you are from municipal environmental protection, food processing, petrochemical or pharmaceutical industry, we can tailor a suitable decanter centrifuge solution for you.
Welcome to contact us for more information or to make an appointment for a product demonstration. We are willing to be your trusted partner！
