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.

This question was broght by the customer, when the client get this, do not know how to do with it, how to control the vacuum pressure of the vacuum degasser vessel? and so on.

Open the bale valve beside the pressure gauge, and check make sure the pressure is between 0.25~0.4Mpa.

The sensor is for emergency, if something goes wrong, the fluid level goes up, the sensor will stop the vaccum degasser.

Here is some simple guide of the sensor:

Do not use and transportation process in the strong shaking or impact device. Instrument in the transport and storage period, the environment temperature does not allow lower than -40 ℃ and above +80 ℃, relative humidity is not more than 85%, and the surrounding does not contain any corrosive gas, no strong electromagnetic field; useing the original distribution box during transportation,.To avoid wet-stained and a variety of chemical substances pollution the greasy stain and damage the surface of the probe surface.

The instrument contains a number of patents from research, with a new signal processing technology, it has advantages of safe, clean, high precision, long life, reliable, easy installation and maintenance, simple reading etc; Widely used in petroleum, chemical, water treatment, steel, coal, electricity and food processing industries, suitable for acid, alkali, salt, anti-corrosive, high temperature, explosion-proof and other areas. The instrument can be connected to a variety of DCS system through 4~20mA or RS485 (modbus/protocol), provide real time level data for industrial automation operation.

Contact GN Solids Control Sales team to get more information or instruction.