GN500GPM TBM mud treatment system is designed and manufactured according to clients’ requirements. Its handling capacity is 500GPM. This system is composed of two classes solids control equipments. While at the same time, three times separation, the first phase is double deck shaker, first the dirty drilling mud comes to the coarse screens, then to the normal 40mesh screens.

• First class: 1 sets GNZS706E-HB linear motion shale shaker for sieving seperation;

• The second class : 1 set GNZJ703E-8N mud cleaner and 1 set GNSB6×5-12J sand pump. Its main principle is adopting sand pump to supply enough power for hydrocyclones, then ,drilling fluids can be under centrifugal separation through hydrocyclone cones;

• Meanwhile, install 1 set GNSLS35A jet mud mixer in the tank. By this mean, it can add and mix mud to supply satisfied drilling fluids for drilling rigs.

Main function & features

1. this system consist of 2 classes solids control processing.:a.shale shaker sieving separation ; b. desilter hydrocylone separation can discharge most particles size more than 20μm in drilling fluids.
2. Adapted shaker screen for GNZS706E-HB linear motionl shale shaker: First deck coarce screen: 750*900mm, 3mm seive wiring, Second deck: 1250×700mm ，40―100 mesh shaker screens. Adapted under fluids shaker screen for GNZJ703E-8N mud cleaner 1250×700 ，100～180 mesh stainless steel frame screen.

The GN500GPM mud treatment system is applied for recycling, cleaning the drilling fluids coming from the drilling rig.Through the user-own mud pump, mud can be sent to inlet manifolds of the system. this system can eliminate sands less than 20μm in size, and supply drilling rigs with satisfied drilling fluids.

As the purpose is different, though 500gpm for HDD or TBM have nearly same equipment, same structure, they get different design.
While we all know TBM have very big particles, then it must have a coarse seiveing screen separation, then we normally prepare a double deck shaker at the first stage. The system for HDD one deck is enough.
Regarding the working process of the recycling system, for the TBM: Firstly, start up the shaker box locking device of GNZS706E-HB linear motionl shale shaker & GNZJ703E-8N mud cleaner(as its operation please refer to the related user manual) in Recycling Tank, and have a trying operation. Then start up pumps.
Now we get the difference, different as the normal 3phase, or 2phase separation, we must have different compartment for sediment, then we can get better solution, lower density / viscocity, closer to the water result. 

Here introduce the 10 main reason of pretensioned screen failure:

1. Improper installation of deck rubbers and/or screens.
2. Careless or improper storage of screen panels.
3. Deck rubbers improperly installed.
4. Deck rubbers dirty, worn or missing.
5. Not washing screens and allowing dried cuttings or drilling fluid to remain during shutdown of shaker.
6. Personnel walking on screens or using the shaker as a work table.
7. Tools or other objects dropped on screens.
8. Extremely high mud weights or heavy solids loading.
9. Defective or improperly tensioned/bonded manufactured screens.
10. Improper handling during installation.

Also, if we are purchasing the lowest price & quality, freely to check out:

1. Frame welding

2. The way of putting 3layers together

3. Wiring thickness

If need more professional advice, freely to contact us.

1. Position of the control cabinet for the Flocculant Unit

   Is this the Final Position or you’re waiting for the Final Drawings ? It won’t be very comfortable to climb over or on the Flocculant pump to adjust there something.
2. Flow Meter (Slurry and Flocculant) Where you want to place them ?

3. Pipes to the Decanter Centrifuge

   The Pipe for the Slurry from the Feed Pump to the Decanter / Centrifuge I cannot see. The Pipe for the Flocculant from Pump to Decanter / Centrifuge goes over the entrance door ? If it’s placed over the door, please make sure it’s a welded stainless steel pipe without any interrupting or a PP Pipe fixed with glue at the bows but please not any connection over the entrance. Fix it properly at the container wall in case of shaking from the centrifuge. And before you connect it to the Inlet Pipe of the centrifuge place a shock absorber in between also for the slurry feed Pipe.

4. Chamber outside

   The chamber out side in the height of the decanter / centrifuge, what is this ? Is this perhaps the air outlet over filter ? If this is the case, place instead of a chamber a jalousie.

5. Air Condition

   The Position at the Decanter / Centrifuge won’t be a good. It’s the hottest place in the container but we want to get rid of the high humidity near the Flocculant unit. I would say place it there. Either same position like now only opposite side at the Container door, not at the small door or on the long side in the middle of the flocculant unit.

6. Balance Points

   Place signs or mark them somehow where the Balance Points are for every unit what has to be lifted for transport or later on jobsite.

7. Floor of Container

   The floor inside the container can be cleaned easily (perhaps drainage to one side). Because normally the floor is a little bit lower then entrance doors. If this is the case, we should have the possibility to clean it up with pressurized water in between. (Slurry, Dirt from Jobsite) Marking of Pieces to be connected Pipes, Electrical connections, Lights, Ladders, Handrail etc. should be marked (what belongs where) for easy assembling.