Tag Archives: Decanter centrifuge

GN Separation Successfully Delivered GNLW224 Decanter Centrifuges to Australian Market

This week, GN Separation successfully carried out running testing and delivered two sets GNLW224 decanter centrifuges to the customer in Australia.

The GNLW224 decanter centrifuge, a star product of GN Separation, has garnered significant attention due to its exceptional functionality and versatile applications across various industries. Whether it’s sludge dewatering, industrial solid-liquid separation, or oil sludge treatment, this centrifuge exhibits outstanding performance. It’s not just an efficient machine but also an innovative solution that offers a more environmentally friendly and efficient approach to industrial waste treatment and resource recovery.

In the field of sludge treatment, the GNLW224 decanter centrifuge can rapidly remove excess water from sludge, significantly reducing its volume and facilitating subsequent processing or reuse. In terms of industrial solid-liquid separation, it precisely separates solids from liquids, ensuring maximum recovery and utilization of valuable resources.

Besides of its impressive performance, these centrifuges are equipped with a range of advanced features, including ABB motors, bearing temperature sensors, and vibration sensors. The implementation of these cutting-edge technologies provides a robust foundation for the efficient and stable operation of the centrifuges. Notably, the bowl is made of duplex stainless steel 2205, a material renowned for its excellent corrosion resistance and wear resistance, ensuring the centrifuge’s longevity and reliable operation.

This successful delivery underscores GN Separation’s prominent position in centrifuge technology and highlights the company’s keen insight and responsiveness to global industrial market demands. As the global industrial landscape continues to evolve, GN Separation remains committed to developing innovative and reliable solutions that contribute to industrial growth and environmental protection.

Let’s eagerly anticipate more outstanding achievements from GN Separation in the industrial sector in the coming years!

2 Sets of GN Decanter Centrifuges Ready for Australian Project

News from GN company this week: Recently, 2 sets of Decanter centrifuge (Model GNLW224) have been manufactured and ready to start serving for an Australian project.

According to the customer’s requirements, ABB brand motors, bearing temperature sensors and vibration sensors are equipped to the decanter centrifuges which comply with IEC Ex explosion-proof standards. In order 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 premier manufacturer specializing in separation and conveying equipment, GN places utmost importance on product quality and the enduring advantages it offers to our valued users. We proudly introduce GN as an esteemed expert in the realm of decanter centrifuges, where meticulous attention is given to the selection of raw materials. Utilizing top-grade centrifugal casting or forging stainless steel materials ensures durability, while implementing hard alloy protection for wearing parts enhances longevity.

At GN, our commitment to precision extends to our manufacturing processes, where state-of-the-art CNC lathes, CNC centers, and CNC gantry milling machines guarantee unparalleled machining accuracy for centrifuge components. When it comes to the dynamic balance of our decanter centrifuges, we go above and beyond by employing a high-speed dynamic balance process alongside the standard low and medium-speed dynamic balancing methods. This meticulous approach ensures optimal performance by dynamically balancing the centrifuge screw and bowl at operational speeds, thereby elevating efficiency and reliability.

With our comprehensive range of decanter centrifuges, GN has made significant strides in various industries worldwide. Our products have garnered widespread acclaim, with a global footprint spanning over 60 countries and regions. The trust and satisfaction expressed by our esteemed customers serve as a testament to the superior quality and performance of GN decanter centrifuges.

How to adjust and control the vibration of decanter centrifuge

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.

Requirements of lubricating oil for decanter centrifuge

During the daily operation some wear will occur to the Decanter centrifuge. So maintenance is imperative in order to extend the service life of the equipment. Lubricating oil must be used regularly. Below we introduce the precautions for adding lubricating oil to the Decanter centrifuge.

The Decanter centrifuge has two main components that need to be lubricated. One is the bearing and the other is the reducer. The bearing is greased, commonly known as butter; the reducer is lubricated, that is, gear oil. Butter is grease. One of the main quality indicators for evaluating grease is the freezing point. Freezing point is the maximum temperature when the oil is not flowing under the specified conditions. The freezing point of butter is higher than normal temperature. When the heating temperature exceeds the freezing point, it can melt and flow. The melted butter can lubricate the bearings, reduce the friction between the components, reduce wear, and have the effect of cooling.

Gear oil should have good abrasion resistance, load resistance and suitable viscosity. In addition, it should have good thermal oxidation stability, anti-foam resistance, water separation performance and anti-rust performance. Gear oil is a lubricating oil with excellent performance. Gear oil is a kind of important lubricating oil mainly composed of petroleum lubricating base oil or synthetic lubricating oil, which is added with extreme pressure anti-wear agent and oily agent.

  1. The lubricating oil should have a certain stability. In the working environment of some decanter centrifuges, the temperature difference between day and night is large. If the oil is poor, it will cause the formation of a lubricating film, which will not play a lubricating role. In order to prevent the occurrence of fire, lubrication should also have flame resistance.
  2. The selected lubricating oil should have certain thermal stability and oxidation resistance. Because the oil tank of the decanter centrifuge is small, the amount of lubricating oil is necessarily small. Moreover, the long-term operation of the decanter centrifuge will increase the temperature of the bearings and other parts, so the lubricating oil needs to be thermally stable.
  3. The working environment of the decanter centrifuge will be contaminated by dust, moisture and other impurities. Therefore, there are requirements for lubrication such as anti-rust and anti-corrosion functions. When impurities are contaminated in the lubricating oil, its performance will not be greatly affected. It does not affect the normal operation of the equipment as standard. Butter is usually added once a shift, gear oil is added at least once a week, and needs to be replaced once a month. So as to meet the maintenance needs of decanter centrifuge.

GNLW364-VFD Decanter Centrifuge for Overseas Chemical Plant

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.

GNLW650 Big Bowl Decanter Centrifuge for Separation in New Energy Industry

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.

2023.11.15 Decanter Centrifuge 654

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.

2023.11.15 Decanter Centrifuge 654

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 participating in Dubai WETEX 2023 This Week

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.

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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.

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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.

2023.11.10 Sludge dewatering centrifuge

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.

2023.11.10 solids vacuum pump

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.

GN Separation Attains Fruitful Results at China Coal & Mining Expo 2023

Recently, GN Separation participated in the China Coal & Mining Expo 2023 and achieved Fruitful Results.

For more information about this show, please click below link.
https://www.chinaminexpo.com/hz/f?language=en_US

 2023.11.03 China coal & mining expo 2023

During this exhibition, GN Separation primarily showcased the following equipment:

1. Tailing Dewatering Centrifuge

2023.11.03 tailing dewatering centrifuge

GN’s Tailing dewatering decanter centrifuge is T series and features a beach angle of 8.5 degrees. The T series decanter centrifuge from GN is primarily employed for dewatering and thickening purposes. It finds widespread applications in meeting the most demanding dewatering needs for municipal and industrial wastewater sludge.

This dewatering decanter centrifuge is engineered for the efficient separation of materials that possess specific characteristics, such as a substantial particle size, a significant difference in density between solid and liquid phases, low viscosity, high concentration, substantial treatment capacity, and achieving a higher degree of dryness compared to clarity.

In situations where materials like sludge or wastewater contain fine particles, it is common practice to introduce flocculants to aggregate these fine particles into larger ones. Subsequently, the T series decanter centrifuge is utilized for dewatering, ensuring the separation and removal of excess moisture.

2. Linear Dewatering vbrating Screen

2023.11.03 linear dewatering vibrating screen

GN’s medium-sized linear dewatering vbrating screen features a foldable design at the screen surface’s feed end, allowing for extended material residence time and achieving rapid dewatering. This linear dewatering vibrating screen is widely employed in desliming, dewatering, media removal, and tailings dry discharge for various materials, including iron ore, non-ferrous metals, coal, and more. The screen deck wall boards are non-welded, crafted from steel plates with superior impact toughness and resistance to cold bending. Hydraulic tensioning assembly employs imported HUCK rivets, ensuring the absence of welding-induced residual stress and material defects in the wall board.

3. Solids Vacuum Pump

2023.11.03 solids vacuum pump

GN’s Solid Vacuum Pump operates entirely via external compressed air, serving as pneumatic conveying equipment. It can effectively transport materials like mud, mineral slurry, and fine aggregate with a high solid content. Its compact structure allows flexible placement at work sites, and as there are no internal moving parts, it’s easy to operate and maintain.

GN Separation will attend the Ecomondo in November held in Italy

GN Separation is delighted to announce its participation in the upcoming Ecomondo Environmental Exhibition, set to take place in Rimini, Italy, this November. Ecomondo is a highly significant event within Italy, focusing on environmental and sustainable development, and it holds a prominent position in the European environmental field.

2023.10.15 Ecomodo 2023

This year, Ecomondo is scheduled to run from November 7th to 10th, spanning four days. Serving as an international platform, Ecomondo offers professionals and businesses from around the world an opportunity to connect, collaborate, and access the latest insights, thereby fostering advancements in environmental protection and sustainable development.

Event Details:

Name: Ecomondo – The Green Technology Expo

Venue: Rimini Expo Centre, Italy

GN Booth: B7, 414

GN will showcase a range of environmental solutions, including the decanter centrifuge, solid vacuum pump, and mini screw press, each with diverse applications in the realm of environmental protection.

2023.10.15 sludge dewatering centrifuge

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.

2023.10.15 sludge transfer vacuum pump

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.

 

Key factors for the operation of decanter centrifuge

The normal operating parameters of the Decanter centrifuge include a maximum mud feed volume and a maximum inflow solid volume. When the actual mud feed volume exceeds the maximum value, the decanter centrifuge will lose the dynamic balance of the solid phase and the liquid phase, and the torque becomes too large . In severe cases, the Decanter centrifuge will be damaged, or the centrifuge will be overloaded and stop running. Therefore, during the operation, the amount of sludge and solids flowing into the decanter should be strictly controlled.

2023.06.08 fish oil 3 phase decanter

Select the appropriate feed flow method: first, adjust the feed flow to a smaller value (under frequency control, generally adjusted to 60%~70%), then start the Decanter centrifuge and work for a while, know that the solid phase is out The speed of the material is balanced. Then sample 500 mL at the entrance of the decanter centrifuge to determine the sedimentation ratio of the mud. It is normal if the precipitation amount is within 100~150 mL within 5 minutes. Otherwise, the bypass valve needs to be opened to reduce the feed concentration.

The water quality recovered by the sludge treatment system changes greatly, and the sludge particles will cause serious wear on the equipment. In addition, there are many uncertain factors that affect the outside world. In addition, there are many types of processing equipment in the system, and the processing links are interleaved. Therefore, to ensure the normal operation of each link and give full play to the role of facilities and equipment, it is necessary to strengthen daily operation management. Supervise the operation management personnel to do a good job in daily operations. Familiar with the function of each equipment, handle the nodes of each link, and strengthen the coordination between the processes.

As a leading manufacturer of separation equipment and conveying equipment, GN always pay high attention to the product quality and consider the long-term benefits for our users. We would also like to introduce GN as a professional manufacturer in decanter centrifuge field, GN pays a lot of attention in the selection of raw materials, high-quality centrifugal casting or forging stainless steel materials are used, and for wearing parts, hard alloy protection is used.