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Shandong LiHancheng Machinery Equipment Co., Ltd
Used LW650 High Speed Horizontal Spiral Centrifuge: Selection and Operation Guide
Date: 2025-10-15Read: 4
In the field of industrial solid-liquid separation, the LW650 high-speed decanter centrifuge has become a popular model in the second-hand equipment market due to its mature technical design and wide adaptability. This type of equipment achieves continuous operation through a horizontal spiral discharge structure, which can meet the separation needs of multiple industries and reduce the initial investment cost of enterprises. Reasonable selection and standardized operation and maintenance are crucial for improving the efficiency of use.
1、 Core characteristics and applicable scenarios of equipment
The core advantage of LW650 lies in the balance between structure and performance. The equipment adopts a design of rotating drum and spiral in the same direction at high speed. After the material enters through the feeding pipe, it is quickly separated into solid and liquid under the action of centrifugal force field. Solid phase material is pushed by the spiral to the slag discharge outlet and discharged, while liquid phase material overflows from the overflow outlet. The entire process can be completed at full speed for feeding, separation and discharge.
From the perspective of adaptability, this model can meet the separation needs of various industries, whether it is raw material purification in the chemical industry, impurity separation in the pharmaceutical industry, or sewage dewatering in environmental protection scenarios, all of which can play a stabilizing role. In terms of material selection, the key components of the machine body are mostly made of corrosion-resistant and wear-resistant stainless steel materials. The screw conveyor has also undergone special wear-resistant treatment, which can adapt to separation operations containing corrosive components or high wear characteristic materials, extending the service life of the equipment.
2、 Key points for purchasing second-hand equipment
When purchasing second-hand LW650 equipment, it is necessary to conduct detailed inspections around the status of core components, power control system, and safety protection devices to avoid potential equipment hazards affecting subsequent use.
1. Inspection of core separation components
As the core of the equipment separation function, the drum needs to be inspected for corrosion marks, obvious scratches, or deformation on the inner wall. The equipment can be observed for abnormal vibration through no-load operation. If the vibration amplitude exceeds the normal range, there may be imbalances or internal damage to the drum.
The degree of wear of spiral blades directly affects the unloading efficiency. It is necessary to observe up close whether the wear-resistant layer on the blade surface is intact, whether there are dents, gaps, or signs of excessive wear. If the wear-resistant layer falls off or the blade shape is damaged, it will lead to unclean unloading and affect the separation effect.
2. Power and control system testing
In terms of power system, it is necessary to start the motor to test its operating status, carefully listen for any abnormal noise during motor operation, and observe whether the speed is stable to avoid equipment interruption caused by motor failure. Professional tools can be used to detect the resistance of motor windings and check for potential short circuit hazards.
As a key component for adjusting the speed difference between the screw and the drum, the differential needs to be manually tested to ensure smooth adjustment of the speed difference. If there is any lag or ineffective adjustment during the adjustment process, further inspection of the wear of the internal gears of the differential is required.
3. Verification of safety protection devices
The safety protection system of the equipment is an important defense line to ensure operational safety, and it is necessary to test whether the speed detection device, over vibration protection device, etc. can be triggered normally one by one. For example, simulating abnormal speed scenarios and checking whether the equipment can alarm and shut down in a timely manner; By slightly adjusting the placement angle of the equipment and testing whether the vibration protection is sensitive, it ensures that the equipment can respond quickly in abnormal states and avoid safety accidents.
3、 Standard for Operation and Maintenance Management of Second hand Equipment
The long-term operation of second-hand equipment cannot be separated from standardized daily operation and maintenance. It is necessary to establish a sound management process from three aspects: cleaning, lubrication, and fault handling to reduce the occurrence rate of equipment failures.
1. Daily cleaning process
Equipment cleaning needs to be carried out in different areas: appearance cleaning can be done by wiping with a damp cloth and mild cleaning agent, avoiding the use of organic solvents to prevent damage to the surface coating of the equipment; The residual materials inside the centrifugal chamber and drum need to be cleaned up in a timely manner. The residual materials can be removed by rinsing with clean water, and then naturally dried to avoid long-term adhesion of residual materials that may cause component corrosion.
2. Regular lubrication and maintenance
The lubrication status of bearings and transmission components directly affects the transmission efficiency of the equipment. It is necessary to develop a regular inspection plan, check the lubrication situation on time, and add suitable lubricants according to the equipment manual requirements. Pay attention to controlling the amount of lubricant used, as too much or too little may affect the transmission effect and even accelerate component wear.
3. Common fault handling
When there is an abnormality in the equipment, it is necessary to investigate and handle it accordingly: if the noise is too loud during operation, you can first check whether the equipment is placed horizontally and whether the bottom shock absorber pad is aging and ineffective. If the above problems are ruled out, further check the wear of the bearings, and replace the worn bearings if necessary; If the speed is unstable, priority should be given to checking whether the power supply voltage is stable and whether the tightness of the transmission belt is appropriate. If the voltage is normal and the belt is not loose, try calibrating the control system parameters to restore stable speed.
The realization of the value of the second-hand LW650 high-speed horizontal screw centrifuge comes from a full understanding of the equipment characteristics, meticulous verification of the selection process, and standardized execution of the operation and maintenance process. As long as these key links are well controlled, second-hand equipment can continue to exert separation efficiency and provide stable support for production.