The dewatering centrifuge produced by GN solids control can be widely used for TBM, waste water treatment, oil sludge separation system, drilling fluids treatment, tailing slurry treatment, etc. industries.

The dewatering centrifuge should be with bigger size, when the chemical dosing system is applied, the treating capacity of the decanter centrifuge will be reduced a lot. Normally the bow diameter is 18 inch, 22 inch, or 30 inch, we have models of GNLW453-VFD, GNLW454-VFD, GNLW553-VFD, GNLW554-VFD, GNLW764A-VFD for option. The most popular model is GNLW553-VFD, with bowl diameter is 22 inch, the bowl length is 71 inch, the ratio is 3.2, the bigger of the ratio, the better of the separation performance of the material. The dewatering centrifuge is drived by VFD control panel with main motor inverter, back drive motor inverter, pump motor inverter, the centrifuge motor can be started with variable frequency so that the start current could be smaller, the motor will not easily burnt because of high current. All of the 3 VFD drive are used world famous brand for reliable working. The other electrical components are also made of world famous brand components, like Siemens, Shneider, Omron, etc.

The dewatering centrifuge and chemical dosing system are installed in a closed 20ft container with windows and doors for convenient transportation and operation. It can use for both powder and fluids chemicals. The dewatering centrifuge mechanical separation cut point is 2~ 5microns, by using proper chemicals, the separation cut point is up to 1 microns. Most of the ultra fine solids can be separated out from the TBM slurry and get the clean water, which can be reused for Tunneling boring machine.
The TBM slurry should be treated by desander unit or mud cleaning unit firstly before feeding to dewatering centrifuge to protect the decanter centrifuge and improve the treatment efficiency.

One set of 15m3/h oil sludge treatment system shipment to domestic client for oil sludge separation project in China. As one of the professional manufacturer of oil sludge treatment system in China, GN solids control have 3 standard models with different treating capacity for your option, including 1 ~2 m3/h, 5m3/h, 15m3/h. If you need bigger treating capacity, we suggest to use several units of oil sludge treatment system.

A basic oil sludge treatment system including: vacuum pump, pre-mixing tank modular, coarse solids separation shale shaker modular, chemical dosing system, decanter centrifuge and 3 phase centrifuge separation skid with buffer tanks. The decanter centrifuge and 3 phase separation skid is the most essential components, the other modular in separate skid is to separate the coarse solids as much as possible and reduce the solids content, so that the decanter centrifuge will not be easily damaged because of high solids content, and the oil is easily separated from the solids. When the solids content is below 5%, and the solids size is below 1 microns, it can be freely treated by the disc centrifuge and get the pure oil, water and few solids.

For cheaper price and higher treating capacity, inclined plate clarifier, oil water separator can be utilized when the required performance result is permit, as the discharged solids with too much moisture, and separated water with much suspended mass, the separated oil BSW is also high, by using proper chemicals, the result will be better. The advantages is with cheaper price, higher treating capacity, no electricity power is required, when there is explosive gas involved in the sloop oil , it can be used freely without explosion .
We can design customized oil sludge treatment system according to different client’s requirement, pls contact with our sales engineer for more information.

The mud recycling system applications are widely used for international construction projects of HDD & TBM. We introduced some of the typical case study:
Project 1: China-Russia gas pipeline project,
CHINA PETROLEUM PIPELINE BUREAU China-Russia gas pipeline Trenchless mud recycling and cleaning system, there are 5 sets of mud recycling system working for the China-Russia gas pipeline project. The technical configuration of the mud cleaning system:

5 sets of 500 GPM HDD mud recycling system, include 5 sets of desander mud cleaner, 5 sets of desilter mud cleaner, 10 sets of drilling mud centrifuge, 5 sets of mud tanks. The working process is as below:
The centrifugal pump #1 feed the slurry from mud pit to desander cone, the discharged solids from desander cone dropped on the shaker screen to recovery more useful fluids, the dry solids are separated out. The fluids flow to mud tank through fluids discharge line. The centrifugal pump #2 feed the slurry from desander compartment to desilter cone, the separated solids from desilter cone dropped on the shaker screen to recovery drilling fluids, the dry solids are separated. The fluids flow to desilter compartment. The centrifugal pump #3 feed the clean fluids to decanter centrifuge to separate the fine solids and storage in the centrifuge tank.
Project 2: Hong Kong Airport

Hong Kong Airport 5.2 KM Aviation fuel Pipeline HDD Trenchless mud recycling system. The HDD mud cleaning system treating capacity is 1500gpm, including 2 sets of shale shaker GNZS703, 1 set of mud cleaner GNZJ703E-3S16N, 1 unit of mud tank, 2 sets of centrifugal pump and screw conveyor. The screw conveyor transfer the discharged solids continuously out and drop down from the discharge port.
GN solids control can design and produce customized mud recycling system for different HDD, CBM, TBM and pipling projects, welcome to contact with our sales engineer.

Several units of drilling fluids treatment high speed decanter centrifuge are shipped to Russia clients recently, this is repeat order again, their previous purchasing including shale shaker, mud cleaner, centrifugal degasser, middle speed decanter centrifuge, high speed decanter centrifuge.

The high speed decanter centrifuge is widely used to treat drilling fluids, drilling waste, oil sludge, construction slurry, industrial waste water and other sludge. The mechanical separation cut point is 2 ~5 microns, according to different client’s requirement, chemical dosing system can be used with decanter centrifuge, to increase the separation performance of the decanter centrifuge, the separation cut point is up to 1 microns. The centrifuge bowl is made of duplex stainless steel and the other components are made of stainless steel 316L, the bowl collection box is made of SS304, the screw is also made of SS304 by heat treatment, the screw propeller is protected by tungsten carbide tiles for longer working life, all the fluids touch parts are corrosion resistance which can be used to treat corrosive slurry. All the wearable parts are protected by tungsten alloy, like fluids distribution port, solids discharge port, screw propeller. The decanter centrifuge can be installed on the telescopic skid or mud tank based on different applications.

When used for drilling waste management system and oil sludge treatment system, the decanter centrifuge should be drived by VFD control panel. The main motor inverter, back drive motor inverter and pump inverter are all from world famous brand and installed within the positive pressurized VFD control panel. We can provide ATEX, IEC EX and CNEX according to different applications. The international famous brand HMI with touch screens for convenient operation, the user can adjust the differential speed, main speed convenient to get different separation result.
If you need decanter centrifuge for drilling fluids treatment, pls contact with GN solids control.