GNMS-500D desander unit with 500gpm treating capacity are widely used trenchless engineering, bore piling project, micron tunneling, TBM slurry separation unit, etc. We strongly suggest users to stock one year operation spare parts with desander unit, the separation cut point of desander cone is 40 microns, if the clients need 3 phase cleaning with desilter cone, we have self contained mud recycling system with standard model for option.
We have economic configuration mud recycling system as below:

GNMS-200D with 200gpm treating capacity, separation cut point 40 microns.
GNMS-500D with 500gpm treating capacity, separation cut point 40 microns.
GNMS-1000D with 1000gpm treating capacity, separation cut point 40 microns.
The high contained mud recycling system including:

GNMS-200B with max 200gpm treating capacity, separation cut point is 20 microns.
GNMS-400B with max 400gpm treating capacity, separation cut point is 20 microns.
GNMS-600B with max 600gpm treating capacity, separation cut point is 20 microns.
GNMS-800B with max 800gpm treating capacity, separation cut point is 20 microns.
TBM slurry separation plant model including:

GNTBM-240 with 240m3/h treating capacity, 3 phase cleaning, separation cut point is 20 microns
GNTBM-360 with 360m3/h treating capacity, 3 phase cleaning, separation cut point is 20 microns
GNTBM-500 with 500m3/h treating capacity, 3 phase cleaning, separation cut point is 20 microns
Mud dewatering unit configuration as below:
VFD decanter centrifuge installed on the tank with chemical dosing unit, with VFD control panel, decanter centrifuge feeding pump, the mechanical separation cut point is 2 ~ 5 microns, with proper chemicals, the separation cut point is 1 microns, most of the fine solids can be removed. The compact design dewatering unit can be used for TBM slurry dewatering, dredging slurry dewatering, industry water dewatering unit.
If you need a customized solution for your trenchless engineering slurry cleaning, pls contact with GN solids sales.

Recently GN solids control shipped 2 units of GNLW554EP decanter centrifuges to our client in Yunan Province, China, they have a project to treat industrial waste water from an industrial area. As one of the most professional decanter centrifuge manufacturer in China, we have C series decanter centrifuge, Y series decanter centrifuge and P series decanter centrifuge.

Except for electricity drived decanter centrifuge ( fixed speed and VFD ), we also have full hydraulic drive centrifuge, the full hydraulic drive decanter centrifuge is used for high temperature ambient for heavy mud with variable bowl speed and differential speed.
“P” decanter centrifuge is dewatering type decanter centrifuge, it is used with dewatering unit as dewatering centrifuge unit, the main applications are for drilling mud, environmental protection sweage, oil sludge, chip fluids, sand washing water, mineral water, soda white mud, salt mud dewatering, etc. We have 6 models of P series decanter centrifuge, GNLW224EP, GNLW364EP,GNLW454EP, GNLW554EP, GNLW654EP, GNLW764EP. The GNLW554EP decanter centrifuge main power is 90KW+45KW, the drive system is VFD with PLC smart control, HMI interface, the bowl material is duplex stainless steel SS2205 by centrifugal casting, the screw material is duplex stainless steel SS2205 or SS316L, the screw impeller is protected by tungsten carbide tiles, the screw beach angle is 11 degree. The bearing is SKF brand for reliable and longer operation.
GNLW554EP decanter centrifuge should be working together with dewatering unit, the user can choose proper type chemicals which can improve the separation efficiency, we can help the client to make a lab test with the waste water samples to test the proper chemicals performance.
Except for industrial waste water treatment, GN decanter centrifuge can be applied for oil and gas drilling mud cleaning, drilling cuttings treatment, oil sludge treatment, TBM slurry dewatering, mining tailings cleaning, dredging slurry separation, etc. applications.

Recently we shipped one set of CBM mud recycling system for coal mining company in China, different with oil & gas drilling rig and HDD mud recycling system, compared with oil & gas solids control system, the CBM drilling rig mud recycling system is with less equipments, less storage capacity, less treating capacity required, smaller footprint. Compared with HDD mud recycling system, the CBM mud cleaning system use more equipments, more storage and mixing capacity, more treating capacity.

The CBM mud recycling system including the equipments below:
(1) 2ea of shale shaker as the first phase cleaning equipments to separate coarse solids, each screen with 3pcs shaker screens, total screen area is 2.63m2.
(2) 1ea of desander with bottom shale shaker and 1ea 10 inch desander cone as the second phase cleaning equipment, to separate the fine solids size 40 ~ 70 microns, the bottom shale shaker with 2pcs screens, the total screen area is 1.35m2.

(3) 1ea of desilter with bottom shale shaker and 8ea 4 inch desilter cone as the third phase cleaning equipment, to separate the fine solids size 15 ~ 40 microns, the bottom shale shaker with 2pcs screens, the total screen area is 1.35m2.
(4) 1 ea of middle speed decanter centrifuge as the fourth phase cleaning to separate the ultra fine solids size 5 microns to 7 microns. The vertically installed submersible slurry pump is the feeding pump of decanter centrifuge.
(5) 4 mud tanks with mud agitator, mud gun, mud tank accessories, valves, pipelines, connectors, electric control system as the treating, storage, mixing mud tank.

(6) 1 unit of jet mud mixer as the mixing unit of the mud recycling system to prepare for new drilling fluids.
(7) 3 units of centrifugal pumps as desander feeding pump, desilter feeding pump and mixing pump.

Vertical G dryer is ideal equipment to treat oil based mud drilling waste, the screw conveyor is matched equipment is to transfer the drilling waste to vertical G dryer. Recently one batch of vertical cuttings dryer and screw conveyor are ready for shipment to International Environmental Engineering Company. GN own made screw conveyor with features as below：

1） The upper cover or steel grating of the screw conveyor for quick switch or both available for customer’s option. The steel grating design is convenient for observation and maintenance.
2） The bearing brand is FAG or NSK for longer working life.
3） The material touch part– screw flights are made of wear resistant and thicker manganese steel, and also sprayed with wear resistant coating to extend the working life.
4） The screw conveyor reinforced frame is with high strength for horizontal and inclined installation. The inclined installation angle should be less than 45 degree.
5） The bearing sears are made of aluminum casting.
6） The inner bearing housing with self-lubricating HWS alloy hanging bearing core with grease filling nozzle to facilitate the injection of grease.
7） The good quality rubber sealing inside the shell cover plate to prevent the dust/ liquids leakage in operation.

8） The major components of screw conveyor including : bearing block assembly at motor side, intermediate hanger bearing and shaft assembly and tail bearing block assembly.
9） Each section to be made as 12ft length, we offer 1 section, 2 section, 3 section or 4 sections with different length for option.
The vertical cuttings dryer can treat the oil based mud drilling waste to drying cuttings with OOC below 5%, in some countries, OOC 5% is permitted for landfill or construction industry (to make bricks). In most developed countries, the permitted limit is OOC below 1% by TDU.