Month: January 2022

 

With the increasing emphasis on environmental protection all over the world and the scarcity of water resources, every country has continuously improved its environmental protection processing technologies. GN Separation has released a series of separation and conveying equipment to meet the requirements of customers coming from the environmental protection industry for new technologies. GN separation and conveying equipment is widely used in the environmental protection industry for wastewater treatment. GN Separation cannot only provide users with single equipment but also provide turnkey solutions of material separation and conveying for customers in the environmental and wastewater industry. Long-term consumption can enhance physical fitness and is good for health.

ENVIRONMENTAL & WASTEWATER INDUSTRY COMMON APPLICATION

Municipal wastewater includes industrial wastewater and domestic wastewater. The typical urban wastewater treatment process mainly includes mechanical treatment, biochemical treatment, and sludge treatment.

Recovery of various waste oils, including waste residues and oil-water mixtures at the bottom of oil storage tanks, oil residues and waste oils in oil refineries, grease dirt in sewage tanks, waste oil-water mixtures in ships, API oil-water separation oil sludge treatment, lubricant, and grease produced in industrial lubrication production systems.

Oil sludge mainly includes waste oil sludge from the cleaning of crude oil tanks, waste oil sludge from oil refineries, and oily waste from oil and gas drilling. GN oil sludge hot washing technology can reduce the oil content of sludge, recover useful oil, and recycle hot wash water.

The deposit silt in the river or lake is firstly cleared by the dredging boat, and then dewatered and separated by GN multi-stage separation and conveying equipment. The recovered solid can be used for construction or farmland fertilizer, and the recovered water can flow back to the river or lake.

Sand washing is very important for sand and stone extraction, but sand washing also produces a large amount of polluted wastewater. In many places, separation tools such as decanter centrifuges are used to clean sand and gravel washing water.

GN High G Force Drying shaker is designed for primary solids control and drying the cuttings from the primary solids control equipment, recovering silts, and ultra-fine sands, providing solids in a consistently stackable and conveyable form, and requires no expensive chemicals or polymers. GN high G drying Shaker with Adjustable G force Up to 8.0 G.

GN Solids Control has developed some models:   GNZS594F-SGZF  & GNZS703F-SGZF

High G Drying Shaker Features

Heavy-duty design and heat treatment for complete shaker deck to give adjustable Linear Motion G force up to 8.0 G to meet more application.

Anti-Corrosion Stainless Steel for the shaker bottom frame to give high strength and longer operation.

Patented rubber sealing system between shaker screen and shaker bottom frame to allow operators to use prementioned shaker screen without sealing rubber.

Wedged type shaker screen locking system for fast screen replacement, pretention API shaker screen interchangeable with international top brand shakers with steel frame or composite material shaker screens.

Patented mechanical drive shale shaker deck angle adjustment while working system.

Simple stainless steel shaker locking system to protect the spring while moving.

Rubber Covered dumping spring for less noise, safety, and longer life.

Process of the High G Drying Shaker Operation.

High G Drying Shaker

The drilling cuttings discharged from the primary shale shaker and desander desilters will be picked up by a screw conveyor, and another screw conveyor will take the drilling cuttings to feed to the High G drying shaker. Sometimes, the client will install a low-profile drying shaker just under the solids control tank to feed to the drying shaker directly. The drilling cuttings will be dried by the high G shaker, and fluids will be caught by the tank under the shaker, a centrifuge feed pump will take the fluids and feed them to a high-speed decanter centrifuge, after treatment by the high-speed decanter centrifuge, the fluids can return back the active mud system for reuse

The purpose of the mud system is to separate the solids from the drilling fluids, although it is true that the Shale Shakers make the equipment vibrate with their motors, the Screen Shakers play an extremely important role when screening the drilling fluids; GN Solids control has managed to develop with high-quality standards with an International format following the norms imposed by the US market, API RP13C or ISO 13501, allowing the manufacture and massive sale of our meshes to the world market, little by little it has been consolidating as a successful option and benefited by the technology offered in its final product.

The GN Shaker Screen was tested by an independent third-party USA company according to API RP 13C(I-SO13501).

(Please contact GN for a detailed API RP13C testing report.)

Features of GN Shaker Screens:

• Automatic Robot Welding of the steel frame to have better quality and consistency.
• High-quality pretension screen for long operation life.
• Four side tension of mesh during the heat press to minimize the gap between the top screen and support screens, in a result extending the screen life. Our competitors normally do not use any tension for heat press.
• GN 3-layer wire meshes for API 60 and above for longer screen life, our competitors normally use 3 layers only for API 120 and above.
• GN wire mesh supplier is an internationally famous brand.
• The steel frame screen is repairable to save cost.
• GN comprehensive line steel frame screen for GN shakers, MI-Swaco Mongoose, Nov Brandt Cobra, Venom,
• VSM-300, FSI screen, Derrick 2000, 500. And we can customize any screen dimension.

ASTM Mesh and API Cut Point:

• ASTM is short for The American Society for Testing and Materials, ASTM E11:01 mesh equals to ISO 3310- 1:2000 mesh. This method determines the cut point of single-layer ASTM screen mesh size. For shaker screen mesh, normally means the surface screen mesh size. Whilst the shaker screen is usually a composition of 2 or 3 layers, the cut point of the first layer’s mesh is not equal to the final shaker screen cut point.
• API is short for American Petroleum Institute, “API Number” is determined by API RP13C or ISO13501, the cut point is related to the combined 3-layer wire mesh test result. So before ordering, GN will need an API number, or the cut point, to define a more proper shaker screen configuration.

GN can produce all kinds of shaker screens:

• GN Solids Control sells around many shale shakers a year, we have shale shakers operating around the world. Using the GN OEM screen will improve your shaker performance and save your operational cost. OEM Shaker Screen for GNZS series shale shaker includes a screen for GNZS703, GNZS752, GNZS594 shale shaker, and screen for GNZJ703, GNZJ752, GNZJ594 mud cleaners.
• Replacement Shaker Screen for Derrick FLC 2000, FLC 500, DP 600, and Hyperpool series shale shaker and mud cleaner, the screens are available in flat or corrugated screens.
• Replacement Shaker Screen for NOV Brandt Cobra, King Cobra, Mini Cobra, Venom, LCM-2D, LCM-3D, VSM 300 series and D380/D285P shale shaker and mud cleaner.
• Other replacement shaker screens for Fluid Systems 29×42, Kemtron/Elgin KPT series, and other shale shaker manufacturers. Customized or OEM Shaker Screens are available.

GN Solids Control has been leading the development of centrifugal decanters from 9 inches to 30 inches with high quality materials and durability, with technology and precision in the assembly, receiving good comments from our end customers every day. The centrifugal decanter that GN has been activating the increasingly efficient process industry and maximizing resources to the full.

 

GN 9 inches Centrifuge

 

GN 30 inches Centrifuge

• Duplex stainless steel SS2304 and centrifugal casting are used to manufacturing rotating bowl, and shaft for big and small end cap. Duplex stainless steel is stronger and more resistant to abrasion and corrosion. This manufacturing process also avoid intergranular corrosion and incomplete release of stress.
• Screw blades are manufactured as a whole piece with CNC forming lathe, leading to high accuracy of the blades and higher solids discharge efficiency
• GN can customize screw with changing pitch for high transfer efficiency and dryer solids
• Optimized cone and pitch with BD plate to separate dewatering section and settling section, with deeper pond depth, longer dewatering section, dryer solids and clearer water. This also increase throughput speed.
• BD plate also helps solids discharge
• Less energy consumption is achieved with bigger pond depth, making decanter centrifuge use less energy. This also reduces turbidity flow of liquid to make separated water clearer, less wear on end blades which makes screw last longer
• Dual cone angle is available for specific high solid concentration materials. The rotating bowl have two cone angles, which reduced discharge resistance and increase treatment capability while maintaining clarify of water and dryness of solids
• Discharge ports are specially made tungsten carbide with excellent anti-abrasion capability and less fragility
• Easy opening mechanism is used so that one man can open the collection box cover for easy access of equipment
• Hydraulic removing mechanism is built into main shaft, which reduced pulling force by 90% when removing main bearings, this helps to ensure the safety of the bearing and high precision parts
• All the rotating parts are made with high accuracy CNC machine. After that 3 step dynamic balancing is done. One is the balancing of rotating assembly at 1800RPM, balancing at real high speed and the balancing of whole machine to ensure stable operation of the decanter centrifuge at high speed
• Both motors are placed in one end of the decanter centrifuges for more service space and spill of slurry to impact service life of motors
• Genuine SKF premium bearing is used for longer service life
• Oil lubrication is used to lower bearing temperature and clean bearings
• Real time monitoring of decanter centrifuge’s working condition for overload, bearing temperature, vibration, lubrication pressure, drive currents and screw torque and alarm will be triggered in case of unusual parameter values.