Processing any equipment will definitely produce tolerances. The higher the processing accuracy, the smaller the tolerances, but the processing cost is greatly increased. The Decanter centrifuge is designed to use a variety of knowledge to achieve a certain processing error, so that the decanter centrifuge’s vibration is controlled within the normal range. However, if the user uses it improperly, it will destroy this design balance and cause serious accidents. Only when the working speed of the decanter centrifuge is not the critical speed, the rotor can move smoothly. For low-speed decanter centrifuges with a low working speed, the critical speed is generally increased as much as possible, so that the Decanter centrifuge operates below the critical speed. The shaft of this decanter centrifuge is very thick and has high rigidity, which is called a rigid shaft. When the speed requirement is very high, reduce the critical speed as much as possible. The shaft is made thinner and the rigidity is small. It is called a flexible shaft. Modern decanter centrifuges all use flexible shafts.

The critical speed is related to the Decanter centrifuge and the rotor used. A decanter centrifuge can be equipped with several kinds of rotors, so when designing a decanter centrifuge, the tolerance of the decanter centrifuge’s vibration reduction design to various rotors should be considered. The working range of the decanter centrifuge is very wide, from several thousand revolutions/minute to tens of thousands revolutions/minute. The higher the rotation speed at which the decanter centrifuge vibration occurs, the greater the danger. Once the vibration occurs at high speed, the decanter centrifuge should be stopped at the fastest speed down gear, and all personnel should leave the scene quickly to avoid personal injury in the event of shaft breakage. Never cut off the power. Once the power is cut off, the brake (rapid deceleration) will be gone and the rotor will stall very slowly. Accidents are generally caused by improper operation of the decanter centrifuge, such as the rotor is not placed on the main shaft, the rotor cover is not covered, the swinging basket of the rotor is not placed, etc. Modern decanter centrifuges generally have unbalanced protection functions. Once the vibration of the rotor is greater than a certain size when the decanter centrifuge is started, the decanter centrifuge will automatically slow down and stop. The decanter centrifuge with this performance sometimes misses the report and cannot ensure that no accidents will occur.

The screw conveyor machining errors and decanter centrifuge installation errors will cause the conveyor  centroid to deviate from the decanter centrifuge main shaft to varying degrees, therefore, vibrations will occur when the rotor rotates, and these vibrations will be inherent to the decanter centrifuge drive system at certain specific speeds The frequency resonates, causing strong vibration of the entire system. The speed at which this phenomenon occurs is called the critical speed. The rotor will cause vibration when rotating at high speed, but the flexible shaft has an “self-aligning effect”. The principle of action is that the rotor produces a disk effect when rotating at high speed, and the elastic reaction force when the flexible shaft bends pulls the rotor that deviates from the geometric centerline of the main shaft back to the geometric centerline of the main shaft, and the vibration disappears. The amount of unbalance existing in the rotor at this time must also have a certain limit, beyond which the vibration will not disappear.

News from GN company this week: Recently, 1 set of Decanter centrifuge (GNLW364-VFD with VFD control panel and a Polymer Dosing Unit GNSJY3000) have been manufactured and ready to start serving for an overseas Chemical dewatering project.

To make sure this series of Decanter centrifuges will provide a reliable performance and the parts and components of all the equipment will run smoothly for a long term operation, our technical department, production department and quality control department have paid a lot of attention to the material selection, material preparation, every step of production and the inspection for this set of equipment in each step.

As a leading manufacturer of separation and conveying equipment, GN consistently prioritizes product quality and considers the long-term benefits for our users. We take pride in introducing GN as a professional manufacturer in the field of decanter centrifuges, placing significant emphasis on the selection of raw materials. High-quality centrifugal casting or forging stainless steel materials are utilized, and for wearing parts, hard alloy protection is implemented.

The use of advanced CNC lathes, CNC centers, and CNC gantry milling machines at GN ensures superior machining accuracy for centrifuge parts. Regarding the dynamic balance of the decanter centrifuge, in addition to the standard low and medium-speed dynamic balance, GN employs a high-speed dynamic balance process. This process dynamically balances the centrifuge screw and bowl at the actual working speed, enhancing overall performance.

In terms of market applications, GN decanter centrifuges find widespread use across various industries. Our products have been exported to over 60 countries and regions globally, earning high praise from satisfied customers.

If you need any support about the operation and maintenance of GN’s equipment like Portable Decanter centrifuge, please feel free to contact GN company for our engineers’ best experience and knowledge in the relevant industry. We will do our best to assist your project because just in this way we can establish a stable and long term cooperation. And we can provide on-line support and site instruction for specific situation if needed.

News from GN company this week: Recently, 1 complete set of GN Big Bowl Decanter centrifuge (Model GNLW650) have been manufactured and ready to start serving for a separation project from new energy industry.

A meticulous approach has been taken to ensure the dependable performance of the Decanter centrifuge system. Our technical, production, and quality control departments have dedicated considerable effort to meticulous material selection, preparation, every production stage, and thorough inspections of the equipment.

GN Separation and GN Solids Control are 2 brands of GN company. GN Separation manufacture industrial separation equipment including Decanter centrifuge, Vibrating Screen, Dewatering Screw Press and pumps. GN Solids Control is a leading manufacturer based in China, USA and Australia, specialize in solids control equipment, industry decanter centrifuge, waste management equipment, and shaker screens. As the first API certified solids control equipment manufacturer from China, GN has a proven track record of delivering top-notch products, which have been exported to over 60 countries worldwide.

With a focus on precision and quality, GN has invested in a comprehensive and integrated manufacturing line, boasting CNC machining, balancing machines, material cutting, coating production, welding fabrication, and assembly workshops. This internal production capability empowers GN to ensure stringent quality control and on-time delivery, meeting and exceeding client expectations.

Should you require guidance on operating and maintaining GN’s equipment, such as the Decanter centrifuge, Chemical Dosing Unit, Screw Pump, do not hesitate to reach out to GN. Our team of engineers possesses extensive expertise and knowledge in the relevant industry. We are committed to supporting your project to foster enduring and stable collaboration. Additionally, we are poised to provide online assistance and on-site guidance for specific scenarios.

As a trailblazing manufacturer of separation and conveying equipment, GN places paramount emphasis on product quality and the sustained advantages it brings to our users. Furthermore, GN takes pride in its role as a professional decanter centrifuge manufacturer. The company places great emphasis on the selection of raw materials, utilizing premium centrifugal casting or forged stainless steel materials, while employing hard alloy protection for wear-resistant components.

GN Separation is delighted to announce its participation in the WETEX 2023, set to take place in Dubai, UAE, 15th – 17th, November 2023. Booth No. 6D13, Hall 6 in Dubai World Trade Centre.

The 2023 WETEX is gaining significant traction, coinciding with the UAE’s ‘Year of Sustainability.’ Anticipation is high, especially given the UAE’s preparations to host COP28 by the United Nations Framework Convention on Climate Change (UNFCCC) at Dubai Expo City in November. In tandem with the exhibition, DEWA will host the inaugural Middle East and North Africa Solar Conference 2023, further drawing experts and researchers in clean and renewable energy. This conference, the first of its kind in the region, focuses on photovoltaic systems, adding a valuable scientific and technical dimension to the event.

At the upcoming event, GN is set to present a variety of environmental solutions, featuring the decanter centrifuge, solid vacuum pump, and mini screw press. Each of these innovations boasts diverse applications within the field of environmental protection, highlighting GN’s commitment to providing comprehensive and effective solutions for environmental challenges.

The sludge dewatering centrifuge is adept at fundamental separation processes such as solid-phase dewatering and liquid-phase clarification. The three-phase decanter centrifuge goes a step further by enabling liquid-liquid-solid separation. Notably, for materials like plastic particles, bacterial bodies, and oily substances, the decanter centrifuge excels due to its absence of filter media (filter screen) and the prevention of screen blockage. GN’s decanter centrifuge has proven highly effective in treating industrial wastewater, municipal wastewater, and oilfield waste oily sludge, significantly reducing treatment costs and enhancing treatment efficiency.

GN’s solid vacuum pump, a fully pneumatic device, can manage a wide spectrum of waste forms, including liquids, slurries, powders, particles, and viscous substances. It finds extensive application in municipal sludge waste treatment and industrial solid waste treatment, with its attributes of safety, efficiency, energy conservation, and environmental friendliness.

GN eagerly anticipates engaging with industry professionals and customers at the Ecomondo exhibition, introducing its products and technologies, and exploring new opportunities for collaboration. GN Separation remains committed to a customer-centric approach, driven by technological innovation, and the ongoing enhancement of product quality and service standards. Participating in the Ecomondo exhibition is viewed as a strategic move to forge connections with customers, partners, and industry experts, jointly propelling the cause of environmental protection.