Author: admin

WEFTEC 2021 was successfully held in America and it attracted quite a lot professional visitors. Among water treatment, an efficient separation is non-doubt an important procedure. GN Solids America has participated in the exhibition and brought to the event 2 compact but handy machines: GNLW224ET decanter centrifuge and GNSP-20B vacuum pump.

GNLW is the model GN Solids Control and GN Solids America name their decanter centrifuges, they are 2 phase decanter centrifuges designed with high speed rotation ability. In the code GNLW224, 22 shows the bowl diameter which is 22 inch and the 4 means the bowl length and diameter ratio. The 4 ratio is larger than 3. For each centrifuge size, GN has both 3 and 4 available. Among the whole GN centrifuge models, there are GNLW363 and GNLW364 decanter centrifuge with 14 inch diameter bowls, GNLW452, GNLW453 and GNLW454 with 18 inch bowl diameter, GNLW553 and GNLW554 with 18 inch bowl and GNLW764 with 30 inch huge bowl.

GNSP-20P is a middle sized vacuum pump. Vacuum pump is also called solids pump because of its high ability for allowing large particles. Unless other pumps, the solids pumps can handle even dry material like sand and small stones. The only size limit is the pipeline size. And by using only compressed air as driven force, those vacuum pumps don’t need electricity. They can be used in Explosive Proof conditions for CNEX, IECEX and ATEX. There are mainly 3 models of GNSP vacuum pumps, the largest one is GNSP-40B with capacity 40cbm per hour, and the other 2 models are respectively 20 cbm per hour and 10 cbm per hour, the 2 smaller models are equipped by wheels for flexible use.

GN Solids America is located in Houston, TX in USA, with warehouse and stock for main equipment. Welcome to visit GN Team there.

In the past years, the sludge treatment works are becoming more and more important because of the focusing on the environment protection. The environment protection in this field includes how to make the sludge less polluted before safely discharge. That’s why the efficient solutions for such sludge become more and more popular.

1. Screw press sludge dewatering:

Screw press sludge dewatering machines are coming more and more welcomed to clients. Screw press dewatering is a kind of economic choice which is also quite environmentally friendly. The working principle is just like when you are twisting a wet towel. The motor will generate a strong force for squeezing the wet sludge by changing the screw diameter and screw pitches. The tiny gaps between floating ring and fix ring will do the squeezing work, to leave the sludge into liquid and cakes. Comparing with other separating equipment, the screw press dewatering machines don’t need chemicals and will sure leave less contamination to the surroundings.
In a recent project, an ES Company purchased from GN Solids Control such a screw press dewatering and a vacuum pump.

2. Solids vacuum pump.

A vacuum pump is also called a solids vacuum pump, which allows in material with high solids content, even dry sand, just to make sure that the material largest particle size is within the limit as pump inlet diameter.
The solids vacuum pump can transfer the material to more than 50 meter away. It is fully air driven, no need for consumption of electricity itself. That’s why it can be located at Explosive conditions by being linked to an air compressor.

Based on your jobsite condition, GN Solids Control can offer customized designs with rich experiences and professional engineer team. For more information, welcome to contact GN sales team directly.

As leading separation solution provider, GN Solids Control has designed and provided separation systems to different industries. Recently, GN just fabricated a new system for a large construction project in North America, including following:

1. Coarse shaker: coarse shale shakers are equipped by rubber screens or gap screens with large openings to remove the large objects. If those large things falls into the tank, it will increase the burden for the shale shaker and also damage the pump.

2. GNZS706F Double deck shale shaker: Shale shakers are efficient equipment to take the heaviest burden for removing particles. By using suitable screen meshes, the shale shaker can remove all particles above 100 microns. A double deck shaker is even more efficient than single deck ones, because on upper deck they adopt one API number for screens to have larger holes, and on lower deck they adopt another API number with smaller holes. In this way, with one set of vibrating motors, there could be 2 stages for separation.

3. GNZS703F-16N Desilter cyclones. Desilter cyclones are also called desilter cones, they are cyclones with 4 inch diameter, and they are used to remove particles below 20 microns by centrifugal force. The cones are fed by a centrifugal pump and the material will be splashed onto inner surface of cyclones. Solids particles will fall down from cyclone bottom and liquid goes up out of cyclone from the top.

4. GNLW553C-VFD Decanter centrifuge. Decanter centrifuge is always located after the cyclones or at least shale shakers with fine screens. Decanter centrifuges can treat the material quite thoroughly by centrifugal force generated from high speed rotation. It is a commonly used equipment for fine particles from 2 to 5 microns. The limit is the inlet solids content. If there are too large particles, it may block or even broke the centrifuge. That’s why before the centrifuge there must be some other equipment.

5. GNDW Chemical dosing system. When there are even finer particles in the liquid, we shall invite in the chemical dosing system. It can flocculate the fine particles into bigger ones by adding chemicals like polymer or something else.

In a recent project, GN Solids Control has provided to an old client from Africa a serious of equipment. Those equipment are to be used for drilling waste management projects. They are kind of customized models including following:

1. 10 sets Variable Speed Screw Conveyor: 7x GNSC12B-12V and 3x GNSC12B-24V. Screw conveyors are quite widely used for transferring materials in a drilling rig system or in a drilling waste management system, or in both, especially when the drilling cuttings waste management system is located along with rig and work at same time. For example, one screw conveyor can be located horizontally under the shale shakers for collecting the cuttings, then a tilt positioned one is used to receive the cuttings and feed to the vertical cuttings’ dryers inlet hopper. Variable speeds are important for the screw conveyors, because the mud condition is changing and capacity is varying, too. A speed adjustable solution can help to solve this problem and allow the screw conveyors to be suitable for more conditions.

2. 8 sets Variable Speed Screw Pump. Same as screw conveyors, the screw pumps are used for feeding the treating equipment, too. The screw conveyor is used for the vertical cuttings dryers, and the screw pump is used for the decanter centrifuge. GN has VFD controlled screw pump and mechanical speed adjustable screw pumps for option. For example in the positive pressurized control panel of a GNMS-363 decanter centrifuge, there are 3 VFD’s applied, respectively for centrifuge bowl, centrifuge back motor and the screw pump for feeding.

3. 10 sets Control Boxes. Control boxes are also one of core products GN provides. GN Solids Control is a certified electric control panel manufacturer for both non-explosive proof control panels and explosive proof control panels, including CNEX, ATEX and IECEX.
Welcome to contact GN Solids Control for more information.

You might not have heard about a vacuum loading solids transfer pump because of the long name used for describe such a powerful pump. But if I mention about a vacuum pump, a solids pump, an air driven slurry pump, it becomes familiar for you. Cause in recent years, those vacuum loading solids transfer pumps are becoming so popular.
This transfer pump can handle for different applications, for wet materials including but not limited to: oily sludge transfer, slurry transfer, tank bottom mud cleaning, animal waste and etc. For dry materials, it can work even better and wider with active carbon, sands, small stones and etc.

This solids pump allows in quite big particles, that’s why it is called a solids pump. The only limit to the incoming material size is the pipe diameter, and GN Solids Pumps can handle particles up to 75mm with a GNSP-40B pump.
It is also called a vacuum pump because it is driven by air only. It doesn’t have a motor for energy, instead, it uses compress air for make a vacuum inside the pump and suck in the material, and also, it pushes out the material with air force. That’s why it is suitable for explosive environment.

Which model is most suitable?
It depends on several factors:

1. Distance from the material’s original location and the distance to where you need to transfer the material. A GNSP-40 vacuum pump can even deliver the material to 1000 meters away, and the smaller models can deliver to 500 meters.
2. Transferring capacity: there are 3 optional models respectively with capacity of 10 cbm per hour, 20 cbm per hour and 40 cbm per hour.
3. Movable or not: if the jobsite is comparably fixable, and you need a larger capacity, then the GNSP-40B will be the most suitable. Well if you need to move the pump as a pulley, the GNSP-10B and GNSP-20B are more suitable cause they are equipped with wheels.
Welcome to contact GN for more information.