Jul 05

Not only for drilling application( oil & gas drilling, HDD, geothermal, CBM, water well drilling), GN equipments can be also used for mining slurry separation, dredging slurry management, piling and tunneling.

Dredging and Dewatering equipments

Dredging and Dewatering equipments

GN dredging and dewatering equipments are designed to feed slurry directly from the dredge. GN dredging slurry separation system separates solids from dredging slurry through a three phase system.

In addition, the solids that are removed are dewatered to a stackable “press filter” state, which can be readily moved with front end loader, conveyor and/or dump trucks. The effluent is pumped off by a centrifugal pump.

The separation process is continuous and operates completely mechanically without any chemical enhancement. The dredging slurry separation system is designed as a three phase separation system, 1st separation is shale shaker, 2nd separation is desander, 3rd separation is desilter. Sometimes as the client’s requirement, we only design 2 phase shale shaker and desander. The desander and desilter are made into separate mud cleaner with large screen area.

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written by GN solids Control \\ tags: , , , , , , , , ,

Jun 23

What is dredging?

Dredging is an excavation activity or operation usually carried out at least partly underwater, in shallow seas or fresh water areas with the purpose of gathering up bottom sediments and disposing of them at a different location. This technique is often used to keep waterways navigable.

Dredging equipments in Colombia

Dredging equipments in Colombia

What is dredger?

dredgers is a piece of equipment which can dig,transport and dump acertain amount of under water laying soil in a certain time.

In a dredging slurry separation project, dredge equipments include but not limit to dredger( dredge boat), dredge pumps, Flocculants mixing tower , slurry concentration tower, belt press filtration, sedimentation tank, dredging slurry separation system(DSS), etc. 

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written by GN solids Control \\ tags: , , , , , ,

Sep 14

GN designed centrifuge mud tank for oilfield and dredging project, with 1 unit of GNLW553VFD decanter centrifuge(or other model available) and Nemo pump to feed the centrifuge, the centrifuge tank is divided into 2 compartment, the mud after treated by shale shaker, desander/desilter flow or be pumped to compartment 1, then Nemo pumppumped it from the compartment 1 to the centrifuge for processing, the clean drilling mud dropped into compartment 2, which can be pumped to other application or flow to anywhere required.

centrifuge mud tank

centrifuge mud tank

In oilfield application, sometimes mud hopper unit also installed on centrifuge mud tank, the mud which will be feed to centrifuge is with solids smaller than 20 microns, it has been separated by desilter cone. After treated by decanter centrifuge, the max solids remained in the drilling fluids is smaller than 5 microns, it is called “clean mud”. The clean mud may be weighted in pill tank/compartment and mixed by mud mixing hopper & mixing pump.

In Dredging project, centrifuge mud tank is applied after dredging slurry separation system, after treated by the desander ( or sometimes desilter), the solids remained in the slurry may be too fine to be separated out by the centrifuge, so you need a flocculation tank before centrifuge mud tank. After flocculation, the mud is concentrate so It is easy for centrifuge to separate it, this is for better performance. So you have to use a positive displacement pump to pump the flocculated mud to centrifuge, otherwise the centrifugal pump will break it off. Sometimes filter press will replace the centrifuge, but efficiency of filter press is not so dissatisfied, so people use large treating capacity centrifuge instead.

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written by GN solids Control \\ tags: , , , , , , , , , , ,

Jul 17

What is Dredger?

Simply speaking, Dredger (Also called dredge) isa vessel used for dredging. It is used to excavate and remove material from the bottom of a body of water. For example, a scoop attached to the end of a rope or pole by which a man can draw sediments up from the bottom of a pond is a dredger. Developing this idea further, a motorized crane equipped with a drag bucket or clamshell (grabber) that is used to scoop material from the bottom of a body of water is also a dredger. The crane could be located on the bank, or perhaps mounted on a barge. If the crane is mounted on a barge, the entire vessel is referred to as a dredger.

Dredge slurry separation system

Dredge slurry separation system

What is Dredging?

Dredging is an excavation activity in which materials are recovered from beneath the water’s surface. The purpose is generally to gather bottom sediment and either dispose it at a different location or use these sediments in various products, e.g. sand and gravel is used in concrete mixtures.

GN solids control design and produce dredging slurry separation system, and we cooperate with dredger manufacturer all of the world. Some of our DSS system has worked successfully in the site with dredger.

Here we listed top 5 Dredger manufacturer, welcome to contact us for more updates.

1 IMS Dredges, Division of LWT, LLC( website: http://www.imsdredge.com/),

2 Ellicott® Dredges

3 Crisafulli Dredges(www.crisafulli.com)

4 VMI Dredger, to see How do VMI dredges work, pls check http://www.vmi-dredges.com/how-dredges-work.htm

5 DSC Dredge(http://www.dscdredge.com/)

If you need dredger and dredge slurry separation system, pls contact GN solids control.

written by GN solids Control \\ tags: , , , , , ,