Month: April 2022

GN Solids Control is a leading manufacturer of decanter centrifuges. And our supplier from Switzerland is the leading brand in centrifugal hydraulic driving systems. GN and our Swiss supplier have been working together to develop the full hydraulic drive centrifuge for international customers to meet the highest standards.

The hydraulic bowl and displacement drive system drive both the conveyor and the bowl of a decanter centrifuge from the hydraulic pump unit via two hydraulic oil circuits.

The advantage of the fully hydraulic drive centrifuge is its use in high-temperature environments for heavy sludge with a flexible bowl and differential speed. The compact single skid design makes mounting easy.

Model GNLW363D-FHD

• Bowl size 360×1270 mm
• Bowl speed 0-3400 RPM （2328G）
• Differential speed 0-70 RPM
• Motor power 45 KW
• Swiss drive system Hydraulic drive
• Maximum capacity 200GPM (45m3/h)
• Maximum torque 4163 N.M
• Dimension (mm) 3000x2400x1860mm
• Weight (KG) 3400KG

 

PRINCIPLE OF HYDRAULIC DRIVE SYSTEM- FHD PRINCIPLE

The fully hydraulic system consists of A the hydraulic pump unit, B the bowl drive hydraulic motor and C the travel drive.

Hydraulic pump unit A feeds hydraulic oil to scroll drive C and bowl drive B by two separate and individually independent operating circuits

An electric motor A1 drives the combined pumps A2 and A3. Each operating circuit is equipped with its own hydraulic pump and controls. The pump unit contains all adjustment devices and safety valves as well as pressure gauges.

With this system, the rotation speed of the bowl, as well as the differential speed of the scroll, can be manually adjusted independently of each other, continuously and infinitely variable during the operation of the centrifuge.

GN designs and manufactures a hydro-vac sludge processing system. It is also called hydro-vac sludge waste treatment or sewage sludge management system. The sludge processing solution is to use liquid and solids separation equipment to treat the soil, soup, or sludge generated by the Hydrovac or HDD project and produce reusable material for construction and clean water discharge. Normally, the slurry is free of contaminants and comes from the physical location of utilities in the public right-of-way and from directional drilling for laying underground pipes or utilities or other privately owned construction.

Features of the GN Hydrovac sludge processing equipment

• Full package design for turnkey solutions
• Many years of experience in the field have shown
• 5-phase separation system for a better result
• Modular system for quick installation and flexible movement.

 

Main equipment for GN Hydrovac sludge processing system

Feed Hopper Feed Hopper for Hydrovac Truck Slurry Loading

Coarse Vibration Screen For separation of coarse material from Hydrovac slurry

Fine agitator module For processing fine solids from hydro-vac sludge residues

Desilter unit For sediment separation with an underflow dewatering screen

Hydrovac dewatering decanter centrifuge For removal of ultrafine solids from sludge tailings

 

Polymer dosing system To mix and supply polymer to the dewatering centrifuge

chemical products

 

Hydrovac Excavation Introduction:

Hydrovac excavation is a non-destructive, precise, non-mechanical process that uses pressurized water and an industrial-strength vacuum to simultaneously excavate and evacuate soil. As the pressurized water breaks up the soil, it creates laitance that is removed using a powerful vacuum in a waste tank. Hydrovac is currently the only non-destructive process method for the excavation operation. Hydrovac excavation can efficiently and accurately excavate in a variety of soil types and environmental conditions, including frozen ground conditions, clay, hard-packed earth, and in remote areas or locations with limited access. Residual slurry from the Hydrovac excavation will be sent to the Hydrovac slurry processing plant for treatment to recycle the water and construction material.

What type of material can the GN Hydrovac sludge processing system handle?

• Soil / Soup / Mud (mud) generated from hydro-vac excavation
• Horizontal directional drilling mud
• Shield tunneling machine for sludge
• Mud treatment of bored piles.
• Other construction sludge waste

 

GN Polyurethane Screen Panel is commonly used in the dewatering and classification of mineral process and construction industries. GN polyurethane screen panel is manufactured by the processing technology of steel wire covered with polyurethane. It is characterized by firm structure and durability. GN polyurethane screen panel adopts high-quality polyurethane raw materials, which have excellent elasticity, super wear resistance, and good screening efficiency. All polyurethane raw materials and their proportion have been tested and strictly selected, and advanced injection molding technology and precision designed & manufactured molds are used for injection molding, which can guarantee GN polyurethane screen panels are completely customized according to your needs. Opening shape and opening size, screen plate thickness, fixing method, overall size, and other elements can be arbitrarily determined. GN polyurethane screen panel can also realize various surface shapes on the screen plate: retaining dam, anti-smashing strip, guide strip, and guide block to improve the screening efficiency.

 

TECHNICAL CHARACTERISTICS OF GN POLYURETHANE SCREEN PANEL

Polyurethane screen panel has a long service life: Generally, more than 6 months, up to one year. Its service life is 8 ~ 10 times longer than the traditional metal screens, 3 times longer than SS screens, and 3.9 times longer than natural rubber.

The production material of polyurethane screen panels belongs to polymer organic elastomer, which has good wear resistance, flexing resistance, and large loading capacity.

High screening rate, self-cleaning screen surface, anti-plugging.

Polyurethane elastic screen panel uses steel wire or metal frame as the skeleton material, which can improve the bending flexibility and increase the loading capacity.

The cone angle of the screen hole is greater than 140 °, and the water permeability of polyurethane is strong, which can effectively prevent the adhesion of wet fine particles, so it is suitable for the screening and separation of wet fine materials.

The use of metal mold can ensure accurate screen opening, high opening rate, and high screening efficiency.

Multiple choices of hole types: Rectangle, square, circle, and other.

Wide application range and strong industrial applicability: the screening of various materials within the range of 0.1mm-170mm, whether dry or wet, will not affect the screening rate. The advantages of polyurethane screen panel are more fully displayed for dehydration and demineralization screen in the range of 0.5m-3mm

Good moisture resistance. It can be used in water or oil and water medium, which can improve the service efficiency and service life

Adopt the modular installation method (300 * 600mm), which significantly reduces the use cost, is convenient for replacement and installation, and reduces the work intensity of replacement

The various product line, GN polyurethane screen panel can match global well-known brand screening machines.

Low noise. No matter what substances and materials are screened during use, there will be no great noise, reducing the noise level by up to 9 dB. This is a 50% reduction in noise perceived by the human ear.

The polyurethane screen panel is not easy to rust, and the storage life is greatly extended. It can be stored for more than 5 years without affecting the service life.

Whether your screening process is used for dewatering, raw ore classification, desliming, or demineralization, GN’s professional knowledge and experience in customized screening systems can ensure to provide the best solution. GN Polyurethane Screen Panel provides customized solutions for your specific screening needs to ensure the screening effect while achieving less wear and longer service life.

 

 

GN High-Frequency Vibrating Screen is mainly suitable for wet screening, classification, and dewatering treatment of fine-grained materials in Mineral and coal preparation and other industry. High-Frequency Vibrating Screen is a self-developed product of GN company, using the two-degree-of-freedom resonance principle. Designed to use a single vibration source (dual imported vibration motors) to drive to realize the linear vibration of the whole machine. High-Frequency Vibrating Screen has the advantages of a large screening area, adjustable screen box angle, compact structure, excellent performance, and high-cost performance. High-Frequency Vibrating Screen has a unique vibration mode, energy-saving, high screening efficiency, large processing capacity, advanced technology, simple structure, stable and reliable operation, It is one of the most advanced equipment in the field of fine-grained material screening. High-Frequency Vibrating Screen uses Polyurethane Screen Mesh, The opening rate is high (28-45%), and the average life is more than 6 months.

 

HIGH FREQUENCY FINE VIBRATING SCREEN MAIN FEATURES

High-Frequency Vibrating Screen is designed based on the principle of self-synchronization of dual motors, and the screen box assembly moves in a linear line.

Imported vibration motor (Martin motor or OLI motor) with advanced technology, reliable operation, and long trouble-free operation time.

The screen box assembly is arranged in multiple stages, which has the advantages of large processing capacity, high screening efficiency, low power consumption, small dynamic load, simple operation, stable performance, safety and durability, and low maintenance.

The mechanical angle adjustment of the screen box assembly is convenient and reliable.

The overall heat treatment of the screen box can meet the long-term work under high vibration intensity.

International famous brand electrical components, Siemens or Schneider components.

Polyurethane Screen Mesh is adopted, good elasticity, not easy to block the screen, three to four screens can be installed

The screen is fixed by the pulling bolt assembly, which is easy to operate and reliable to fasten.

The surface of the vibrating screen is treated by sandblasting and sprayed with heavy anti-corrosion paint, which has good anti-corrosion performance.

GN Classification Vibrating Screen is widely used in the classification and screening of iron ore, coal, non-ferrous metal ore, building materials, chemical industry, and other materials. The equipment adopts advanced design means such as finite element analysis and anti-fatigue analysis to ensure the reasonable structure, low energy consumption, and large screening and classification capacity of the screening machine. It can be applied in various working conditions that are easy to corrode and wear. Large processing capacity, high efficiency, and stable performance. The size of the screen machine can also be customized according to customer requirements. Two vibrating motors are installed on the GN classification vibrating screen, and the screen body moves in a linear line by using the principle of reverse self-synchronization. The screen body drives the screen panel to vibrate synchronously, transmits the force to the materials on the screen panel, and impacts materials to throw up on the screen surface for layering, and through the screen graded according to the specified particle size. The materials are continuously buffered and input from the feeding trough to the receiving plate screened and graded through the screen surface. And the materials above and below the screen are discharged into the receiving trough above and below the screen respectively to enter the next process link. The included angle between the direction of vibration force and the horizontal direction can be designed according to the properties of the materials on the customer’s site. This included angle determines the running speed of the materials on the screen surface and the processing capacity of the equipment.

 

CLASSIFICATION OF VIBRATING SCREEN-LINEAR MOTION TECHNICAL CHARACTERISTICS & ADVANTAGES

The wallboard is not welded. The steel plate with better impact toughness and cold bending is selected, and the imported HUCK rivet is used for hydraulic tension assembly. This advanced design makes the wallboard free of welding residual stress and material defects, so as to avoid the reduction of fatigue strength of the wallboard due to the above defects.

Through finite element analysis, optimize the structural strength and vibration quality of the screen machine to the greatest extent, reduce stress, and prolong the service life of the equipment.

The fluids touching parts and easily worn parts are sprayed with polyurea by the spraying machine imported from the United States, which is corrosion-resistant, erosion resistant, and wear-resistant.

The post-weld heat treatment process of main components can effectively eliminate the welding stress.

Product serialization to meet the manufacturing requirements of customers under different process conditions; Polyurethane screen panel is modular, more versatile, and more convenient to replace.

The whole machine is installed at a positive inclination angle, and the installation angle is 4 degrees adjustable, which is suitable for the requirements of different process materials.

The plane design of the whole screen surface is more conducive to screening and grading materials and maximizes the effective screening area of the screen surface.

The rubber damping spring design has the advantages of good damping effect, low noise, small resonance field, good resilience, stable mechanical performance, long service life, and low cost.