mud cleaning unit

Recently one unit of decanter centrifuge and desander unit are shipped to trenchless engineering company.
The mud decanter centrifuge model is GNLW452D, it is the popular model among GN decanter centrifuge for trenchless drilling mud treatment. The middle speed decanter centrifuge separation cut point is 5 ~7 microns, after long time operation, the ultra fine solids which can not be separated out by hydrocyclones will accumulate in the mud tank, which can not be reused directly, the customer need the decanter centrifuge to separate the solids up to 5 microns, the dewatering unit can be applied if required, then the clean fluids can be reused to prepare for new drilling fluids.


The mud cleaning desander unit is GNMS-1000D, with treating capacity 1000gpm, the separation cut point is 45 microns, the working process is as below: the submersible slurry pump feed the mud to desander unit bottom layer screen for coarse solids separation, the fluids drop into the catching tank under the double deck shale shaker, the centrifugal pump feed the slurry to desander unit for fine solids separation, the solids discharged are drying by top layer shaker screen to collect more useful fluids, the desander cone separation cut point is 45 microns. The clean mud flow to the storage tank directly, If the customer need mud mixing to prepare for new fluids, they can connect the jet mud mixer with the storage tank by flexible hose, the mixing hopper, mixing pump and pipelines, control panel are all installed on one skid .


Except for GNMS-1000D desander unit, we also have GNMS-500D, GNMS-200D mud cleaning unit with 500gpm and 200gpm treating capacity, based on client’s requirement, we can design customized mud cleaning system with mud mixing, storage, cleaning process with different capacity, we have economic configuration and high configuration mud cleaning system for option.

Recently we shipped one set of dewatering centrifuge with chemical dosing system to Singapore for TBM project. They bought one set of TBM desander unit model number GNMS-1000D before, which is our economic configuration mud cleaning unit for TBM slurry.
The technical specs are as below: Double deck shale shaker with 2 ea of 10 inch desander unit installed on a compact size mud tank with stairs, centrifugal pump feed the slurry to desander cone.
The working process is as below: the submersible slurry pump transfer the slurry to bottom shale shaker to separate coarse solids from the slurry, the fluids dropped into the mud tank, the centrifugal pump feed the clean fluids to desander cone, the clean fluids discharged from outlet pipe and flow to storage tank for reuse or further treatment. The separation cut point is 45 microns. The discharged solids dropped down to top layer shaker screen to recycle more useful fluids.
The dewatering decanter centrifuge model number is GNLW553-VFD,the bowl diameter is 550mm, the bowl length is 1800mm, the max capacity is 500gpm, and typical capacity is 400gpm, when adding flocculants, the treating capacity will be smaller based on different materials. The main motor is 90KW, the back drive motor is 37KW, the differential speed is 0 ~ 45 rpm, gearbox torque is 12000 N.m., the typical speed is 0 ~2500 rpm, the typical G force is 0 ~1888G.
Since the slurry desander unit separation cut point is 45 microns, it can not be reused directly, the dewatering centrifuge with flocculants can separate fine solids from the slurry up to 1 microns, the recovery water is clean and can be reused for TBM project to save cost for the client. The discharged solids with less moisture can be collected by bag and ship out by truck conveniently.