With the continuous improvement of industrial automation, environmental protection policies and awareness of resource reuse, the role of solid-liquid separation equipment in industrial production has become increasingly critical. Among them, the Decanter Centrifuge is widely used in complex process flows in many industries due to its compact structure, continuous operation, and efficient separation. Whether it is municipal sewage, food processing, or petrochemicals, metallurgy and minerals, the Decanter Centrifuge plays an irreplaceable role.
Overview of the principles and technical advantages of Decanter Centrifuge
The horizontal screw centrifuge is a continuous operating device based on the principle of centrifugal sedimentation, suitable for solid-liquid separation of materials with high solid concentrations. Its basic structure consists of a drum, a screw propeller, a motor drive system, a differential device, and a feed and discharge mechanism.
When the mixed material enters the rotating drum cavity through the feed pipe, the materials of different densities are layered due to the centrifugal force: the dense solid particles are deposited on the drum wall, and the lighter liquid forms a liquid ring. The screw propeller rotates at a small differential speed, continuously pushing the solid to the slag discharge port, realizing the separation process of continuous slag discharge and clear liquid discharge.
Technical advantages:
High separation efficiency: can achieve liquid-solid and liquid-liquid-solid three-phase separation, especially suitable for processing high solid content or high viscosity materials;
Strong continuous operation capability: can operate stably for a long time, especially suitable for industrial scenarios with large processing volume;
Compact structure and small footprint: the equipment has high integration and can be embedded in complex production processes;
Automated operation: modern horizontal screw centrifuges are widely equipped with PLC control systems, which can be unmanned;
Strong adaptability: the speed, differential speed, drum structure, etc. can be adjusted according to different materials to meet various separation needs.
Municipal and industrial wastewater treatment industry
1. Municipal wastewater treatment plant
In urban wastewater treatment, sludge produced in sedimentation tanks or biochemical tanks needs to be dehydrated. The traditional plate and frame filter press method is time-consuming and labor-intensive, while the decanter centrifuge has widely replaced the traditional process with its characteristics of automation, continuous operation, and high solid recovery rate.
Application effect:
The moisture content of sludge can be reduced to about 75%;
It can continuously treat 30-100m³/h of urban sludge;
Reduce manual operation and realize automatic slag discharge.
2. Chemical and printing and dyeing wastewater
Printing and dyeing wastewater contains a large number of fine pigment particles and additives, which are difficult to separate. After adding flocculants, the decanter centrifuge can efficiently separate solid impurities, realize clear liquid reuse and sludge concentration.
Petrochemical Industry
A large amount of oily sludge, emulsions and wastewater containing impurities will be generated during the extraction, refining, storage and transportation of oil. With its high-speed three-phase separation capability, the decanter centrifuge has become an ideal equipment for processing such highly complex mixtures.
Application scenarios:
Oily sludge treatment: recover useful components from solids, oil and water;
Refinery wastewater treatment: achieve rapid demulsification of emulsified oil;
Oilfield drilling fluid recovery: separation of mud, drill cuttings and lubricating oil.
Advantages:
Increase oil recovery rate and reduce oil content in water;
Effectively reduce emission costs and meet environmental protection standards;
The equipment has strong corrosion resistance and is suitable for high-salt and high-acid and high-alkali environments.
Food and Beverage Industry
Papermaking, textile and leather industries
These industries will discharge a large amount of high-solid wastewater and impurity residues during rinsing, printing and dyeing, pulping and other processes. Horizontal screw centrifuges are widely used in wastewater pretreatment and residue dewatering due to their continuous separation and automatic slag discharge capabilities.
Application results:
Greatly reduce COD and BOD emissions;
Reduce sludge moisture content to 70%-80%;
Convenient for sludge transportation and subsequent treatment.
With the advancement of technology and increasingly stringent environmental regulations, decanter centrifuges are expanding from the traditional sewage treatment field to a broader industrial system. Its strong adaptability, high efficiency and high degree of automation enable it to handle more and more complex industrial separation tasks.
In the future development of intelligent manufacturing and green industry, decanter centrifuges will continue to serve as key separation equipment to help various industries achieve the dual goals of maximizing production efficiency and minimizing environmental impact. For enterprises, rationally selecting and optimizing the configuration of decanter centrifuges is an important step in achieving cost reduction, efficiency improvement, transformation and upgrading.
