Month: September 2020

One unit of solids liquid separation system and one decanter centrifuge package to Europe client. The solids removal unit can be widely used for mining core drilling waste water treatment. The separation cut point is 2~5 microns, the recycled water can be re-used for drilling, the user will save drilling cost, less water consumption, less waste produced.

The submersible slurry pump is picking up to transfer the waste sludge from pit to the solids liquid separation system shale shaker. The shale shaker is used to separate big solids and reduce solids content, the GNLW223-VFD decanter centrifuge is to separate fine solids bigger than 2 microns, the screw pump as feeding pump of the VFD decanter centrifuge, the flow rate can be adjusted by changing the frequency of the pump motor, it will be controlled by the decanter centrifuge VFD control panel. All of these equipments are installed on top of the mud tank with tank accessories.

The decanter centrifuge package GNLW224E is extra required, the discharged water is more clear since the bowl length is longer than GNLW223 series decanter centrifuge. Both of the bowl diameter is 9 inch ( 220mm), the bowl length of 223 series is 670mm, the bowl length of 224 series is 924mm, the ratio of 223 series is 3, the ratio of 224 centrifuge is 4.2, the fluids can be treated better and get more clear water.

9 inch bowl decanter centrifuge is the mini centrifuge among GN decanter centrifuges, we can also produce 14 inch bowl, 18 inch bowl, 22 inch bowl and 30 inch bowl decanter centrifuge with different bowl length, different rotation speed, different G force and different treating capacity for your various applications. If you need a waste water treatment solution and customized separation system, pls contact with GN solids sales.

Recently GN solids control shipped 4 units of desander units to domestic HDD contractor, the desander unit is also called economic mud cleaning system, which can be widely used for mud cleaning of TBM, Piling, micro tunneling, pipe jacking, HDD, etc. civil engineering works. With different treating capacity, we have GNMS-200B, GNMS-500D, GNMS-1000D for option. If the client need mud mixing and storage, they need to prepare for extra jet mud mixer connected with their storage tank as mixing and storage tank. The submersible slurry pump is installed vertically on top of mud pit to transfer the waste sludge to the desander unit. The composite material frame shaker screens on both top later and bottom layer of the double deck shale shaker is utilized for longer working life and reduce screen replacement time.

With economic cost, small footprint, compact design, easy operation, the desander unit is very popular for trenchless engineering companies. Normally a desander unit including a double deck shale shaker with proper qty hydrocyclones, 1 centrifugal pump, one catch tank to pick up the treated mud from first phase coarse solids separation shaker screens, the clean mud from hydrocyclones will flow to storage tank directly through pipelines.

For 200gpm mud cleaning unit, the hydrocyclone is 4 ea 4 inch desilter cone. For 500gpm mud cleaning unit, the hydrocyclone is 1 ea 10 inch desander cone, for 1000 gpm desander unit, the hydrocylone is 2 ea 10 inch desander cone, the centrifugal feeding pump model will be changed accordingly. All of the economic desander unit is a 2 phase cleaning unit, if the user need 3 phase cleaning unit, we will recommend our standard or customized design high configuration mud recycling system.
The operation cost of the desander unit is very low, the critical wear parts including pump impeller, seals, bearings and shaker screens, hydrocyclones.

One batch of VFD decanter centrifuge and screw conveyor are ready for shipment to waste water treatment company. As one of the professional manufacturer of decanter centrifuge in China, GN Solids Control can produce different size decanter centrifuges from 9 inch, 14 inch, 18 inch, 22 inch, 30 inch bowl diameter for different applications, including industrial waste water treatment, mining tailing treatment, dredging slurry separation system, HDD & construction waste slurry treatment, oil & gas drilling mud and drilling cuttings treatment, oil sludge treatment unit.

To transfer waste slurry with high solids content, 3 ways can be selected, screw conveyor system, sludge vacuum pump unit, drilling cuttings transfer pump. The screw conveyor is the traditional equipment to transfer waste slurry with continuous working. Each section standard length is 12ft, we can provide 12ft, 24ft, 36ft, 48ft length screw conveyor for option. The sludge vacuum pump is 100% air operated pump without electricity power supply, the discharge distance is up to 1000m, the suction distance is up to 50m, the max solids content is up to 80%, and max solids size is 75mm. The pressure required is 80 ~114 PSI, and air demand is 17m3/ min （600CFM）， the user should prepare the air compressor to supply air.
GN decanter centrifuge features as below:

1) Centrifuge straight bowl material is made of duplex stainless steel 2205 or 2304 by centrifugal casting, the cone section is made of stainless steel 316L, which is much better than other’s material SS304. The centrifuge collection box is made of SS304.
2) The screw is made of stainless steel 316L, and the impeller is protected by tungsten carbide tiles for longer working life, it is repairable once damaged. The open impeller design will increase the treating efficiency and separation performance.
3) The bearing is made of SKF brand for reliable operation.

GN solids control can design and produce both WBM waste treatment system and OBM waste treatment unit. The core equipments for WBM waste treatment system is high G drying shaker and VFD decanter centrifuge, the major equipments for OBM waste treatment unit is vertical cuttings dryer and VFD decanter centrifuge.

The working principal of vertical cuttings dryer is as below:
The major components of vertical G dryer including stainless steel screen basket, rotor assembly, bearing, individual oil lubrication system, control panel, main motor, oil pump motor, air knife to clean the screen basket to prevent it from blocking the screen basket, bell jar. By centrifugal force, the screen basket accelerates to 900rpm with 420G force, the liquid is forced pass through the screen opening, and the dry solids are extracted by flights to the cone, which rotate slowly than the screen basket. The flights are protected by tungsten carbide alloy with better abrasion resistance for longer working life. The fluids flow to intermediate tank through fluids discharge line, the dry solids are discharged from discharge port, the client can collect the cuttings by screw conveyor and transfer to cuttings container continuously. The oil on the cuttings in the discharged solids is below 5%, which can meet the environmental protection regulation for land fill. The fluids in the intermediate tank will be transferred to decanter centrifuge for ultra fine solids separation. The vertical cuttings dryer and VFD decanter centrifuge are installed on the same skid for convenient operation and transportation.

The cuttings transfer system including one horizontal screw conveyor and slant installed screw conveyor, or cuttings transfer pump with diesel engine drived, or vacuum pump which is 100% air operated pump to transfer the oil based drilling waste to vertical cuttings dryer system.
For more information, pls contact with GN solids sales.