With the continuous improvement of industrial automation and environmental protection standards, decanter centrifuges, as efficient solid-liquid separation equipment, are widely used in many industries such as municipal sewage treatment, food processing, chemical medicine, oil drilling, mining and metallurgy. As a professional Chinese decanter centrifuge manufacturer, we are committed to bringing high-efficiency, low-energy consumption and intelligent products to the global market. This article will focus on the five modules of the technical principle of the decanter centrifuge, customer cases, FAQs, industry trends and purchasing guides, to give you a comprehensive analysis of the advantages and value of the decanter centrifuge.
Technical principle of Decanter Centrifuge
Decanter Centrifuge (Horizontal Decanter Centrifuge) is a device that uses centrifugal force to achieve continuous solid-liquid separation. It is widely used to separate liquid media containing solid particles. Its core technical principles are as follows:
1. Working principle
Decanter Centrifuge separates the materials entering the equipment in layers through the relative movement between the high-speed rotating drum and the screw propeller driven by the differential. The main process is as follows:
Feeding system: The material to be processed enters the drum from the feed port.
Centrifugal separation: The high-speed rotation of the drum generates a strong centrifugal force, which causes the solid particles in the material to quickly settle to the drum wall to form a solid phase layer, while the liquid remains in the inner layer.
Solid discharge: The screw conveyor has a certain differential speed relative to the drum, and the deposited solids are transported and discharged along the conical section to the outlet.
Liquid discharge: The clarified liquid is discharged from the overflow port at the other end to achieve continuous separation.
2. Technical features
High speed and high separation factor: The typical separation factor is up to 3000~4000 G, which is suitable for fine particle separation.
Continuous operation: The material is continuously in and out, suitable for long-term operation with large flow.
Adjustable differential: By adjusting the differential, the adaptability under different working conditions can be achieved.
Low energy consumption design: The optimized flow field design is combined with the energy-saving motor to effectively reduce energy consumption.
Intelligent control system: PLC+HMI system, supporting remote monitoring and automatic operation.
Customer Case Sharing
Case 1: A Municipal Wastewater Treatment Plant in Jiangsu
Background
The sewage treatment plant treats 100,000 tons of sewage per day. It originally used a plate and frame filter press, which had low treatment efficiency, high labor intensity, and high operating costs.
Solution
We customized two LW450 horizontal screw centrifuges for it, and equipped them with an intelligent control system and automatic dosing system.
Results
The moisture content of the dewatered cake was reduced from 82% to 72%, and the subsequent transportation and disposal costs were reduced by about 30%;
The degree of automation of operation was improved, and the number of operation and maintenance personnel was reduced by half;
The annual operating cost savings exceeded 500,000 yuan.
A starch processing plant
Background
During the starch production process, the COD concentration of wastewater is high, and the solid-liquid mixture is difficult to separate, which directly affects the efficiency of the production line.
Solution
We provide LW520 three-phase horizontal screw centrifuge, which supports three-phase separation of solid, liquid and oil.
Results
The separation effect is significant, the recovered starch yield increased by 15%, and the wastewater discharge meets the standards.
3. FAQ
Q1: What is the difference between a decanter centrifuge and a traditional filter press?
A: A decanter centrifuge is a continuously running device with high processing efficiency and high degree of automation; while a filter press works intermittently, requires more manual intervention, and is suitable for small batch processing.
Q2: What materials can a decanter centrifuge process?
A: It is suitable for various suspensions, including municipal sludge, food residues, oil residue mixtures, drilling fluids, emulsions, papermaking waste liquids, pharmaceutical waste residues, etc.
Q3: How to determine whether a dosing system is required?
A: If the particle size of the solid phase particles in the original material is too small or the concentration is too low, it is recommended to add an automatic dosing device to enhance the flocculation effect, thereby improving the separation efficiency.
Q4: Is the equipment maintenance frequency high?
A: Our decanter centrifuge adopts a variety of wear-resistant technologies such as wear-resistant alloys and ceramic spraying. Under normal operation, only one routine inspection and maintenance is required each year.
Q5: Does it support non-standard customization?
A: Yes. We provide on-demand customization, including feeding system, machine body material (stainless steel 316L, duplex steel 2205, etc.), slag discharge method, electronic control system, etc.
Industry dynamics
Environmental protection needs and intelligent manufacturing boost the development of horizontal screw centrifuges
Policy promotion
Under the background of China’s “dual carbon” policy, the demand for environmental protection equipment continues to grow;
Wastewater treatment regulations in the EU, Southeast Asia and other places are becoming increasingly stringent, and the reliance on high-efficiency separation equipment is increasing;
“Industrial Enterprise Wastewater Discharge Standards” and “Technical Specifications for Operation and Management of Urban Wastewater Treatment Plants” and other standards are becoming increasingly refined.
Decanter Centrifuge Purchasing Guide
Choosing a suitable decanter centrifuge is not only related to the initial investment, but also directly affects the long-term operating costs and production efficiency. The following are several dimensions that must be considered before purchasing:
1. Clarify the processing requirements
Daily processing capacity (m³/day)
Material type (organic sludge, industrial wastewater, food waste residue, etc.)
Solid content and separation target (target moisture content)
Whether continuous operation is required
2. Technical parameter matching
When selecting, attention should be paid to: drum diameter, aspect ratio, speed, separation factor, differential torque, etc.;
Different materials require different drum forms (cylindrical section/conical section ratio, opening method, etc.);
When corrosion resistance is required, special materials such as duplex steel and titanium alloy should be selected.
The decanter centrifuge is not only an efficient separation equipment, but also an important tool to improve industrial environmental protection and resource recovery efficiency. As a professional Chinese manufacturer, we always adhere to the concept of “customer first, technology leading” to provide global users with reliable, efficient and intelligent solid-liquid separation solutions.
If you are looking for stable, durable and cost-effective decanter centrifuge products, please feel free to contact us. We are willing to be your trusted partner!
