TBM

Recently 3 units of trenchless GNMS-500D desander unit for HDD project in China. The desander unit can be widely used for HDD, trenchless engineering, piling slurry cleaning, Micro TBM ( Tunnel Boring Machine), diamond core drilling, water well drilling. Depends on the piling bore hole qty and depth or HDD machine required flow rate, we can help our client to select proper model mud cleaning system or provide a customized solution for their projects.


The technical configuration of GNMS-500D desander unit is as below:
The general treating capacity is 500gpm, desander separation cut point is 40 microns, the mud cleaner model is GNZY753E-Y1S with 1 ea 10 inch desander cone, with vibration strength is below 7.1G ( adjustable), the bottom screen area is 1.35m2, top screen area is 0.875m2, total screen area is 2.22m2. The hydrocyclone feeding pump is GNSB5X4C-13(12)J with 30KW motor. Total power is 32KW, the inland shipping dimension is 3103x1896x2441mm, the operation dimension is 3506x1896x3907mm, total weight is 2850kgs.


The working principal of piling desander unit is as below:
The submersible slurry pump pick up the slurry from mud pit to bottom shaker screens of the double deck shale shaker to separate coarse solids from the slurry and protect the centrifugal pump impeller, the fluids dropped into the mud tank and the desander feeding pump feed the fluids to desander cone, the fluids after treatment will flow to storage tank through pipelines, the solids are dropped on the top layer shaker screen and separated out. The user need to prepare the flexible hose to connect the submersible slurry pump with the desander unit, and mixing unit with hopper, and a big storage tank.


Except for GNMS-500D desander unit, we also have other models, as GNMS-200D desander with 200gpm treating capacity, GNMS-1000D desander unit with 1000gpm capacity.

As a professional manufacturer of mud recycling system for HDD & CBM & TBM, our mud recycling system have been widely used for international big projects. Here are some typical projects case study:
Case study 1:
Project period: Year 2014 ~ 2019


Customer status: CHINA PETROLEUM PIPELINE BUREAU China-Russia gas pipeline Trenchless Project. CPP is the largest petroleum pipeline engineering company in China and the largest contractor for the China-Russia gas pipeline project. Over 20 units of GN mud recycling system are working for CPP projects. And 5 of these HDD mud recycling system are used in the China-Russia gas pipeline project.
Project status: The 3,000-kilometre (1,850-mile) pipeline, which was the world’s largest construction project ,will supply China with 38 billion cubic meters (1.3 trillion cubic feet) of gas annually when fully operational in 2025. Russian leader Vladimir Putin and Chinese counterpart Xi Jinping hailed the “Power of Siberia” pipeline as a symbol of cooperation.
Case Study 2:
Project period: Year 2016 ~ 2018
Customer status: Hong Kong Airport


Project status: HDD Trenchless mud cleaning and recycling for 5.2 KM Aviation fuel Pipeline installation. The mud recycling system specification including:
2 sets of 1500gpm mud recycling system, including 6 sets of GNZS703 Shale Shaker, 2 GNZJ703E-3S16N mud cleaner, 2 mud tanks, and centrifugal pumps and screw conveyor.
The working process of the mud cleaning system is : the submersible slurry pump feed the slurry to shale shaker, the coarse solids are separated out from shale shaker screens, the clean fluids dropped into shaker tank, the centrifugal pump feed the clean fluids to mud cleaner desander cone to separate solids bigger than 45 microns, the clean fluids dropped into desander compartment, the centrifugal pump 2 feed the clean fluids to desilter cone to separate solids bigger than 20 microns, the clean fluids are storage into the desilter tank.

One set of dewatering centrifuge package is shipped to Southeast Asia for TBM mud treatment and water recovery project. This is not the first dewatering centrifuge package to be used for TBM mud dewatering project, we ever used it for similar projects several years ago, pls check the working video from our website: https://www.gnsolidscontrol.com/video/gn-solids-control-drilling-mud-dewatering-system-working-video


If you need the customized solution of huge volume mud treatment for TBM, Tunneling, Piling projects or other pipeline laying projects, pls contact with GN solids sales.
The technical specifications are as below:
1) 1 unit of GN dewatering decanter centrifuge laying into the 20ft container, the max speed is up to 3900rpm, the normal operation speed is 3200rpm, with separation cut point by mechanical separation is 2~5 microns. The max G force is up to 3063G, the normal G force is 2062 G, the bowl is made of duplex stainless steel 2205, the screw is made of stainless steel 304. The fluids distribution port and solids discharge port is made of tungsten carbide inserts and it is replaceable. The screw impeller is protected by tungsten carbide tiles for longer operation time.


2) The chemical dosing system installed into a 20ft container, including 3 compartment tank with chemical feeding hopper, agitator, piping system and bracket, PLC control panel and chemical dosing pump. Normally flocculants will be added by the chemical dosing system to the decanter centrifuge feed pipe, so that the ultra fine solids will be accumulated to bigger size solids, the decanter centrifuge can separate them easily, it will increase the separation performance of the high speed decanter centrifuge.


3) The container equipped with doors, windows, air conditioner, lightings, etc. accessories for customer’s requirement. The 2 container design is customized design, usually we will put everything into a 40ft container for convenient transportation or without container as per client’s option.