Month: August 2021

As one of solids transfer pump manufacturer in China, GN solids control produce different size of vacuum pumps to meet our customer’s requirement. The vacuum pump can be used as solids transfer pump, mud transfer pump, oil waste / oil sludge transfer pump, waste water transfer pump and other waste such as animal waste, etc.
We have 3 models vacuum pump for option, GNSP-10B, GNSP-20B, GNSP-40B.

The suction process is that the compressed air is sucked in the vacuum tank through the air intake, when the air fulfill the vacuum tank (body ), it produced a genitive pressure in the vacuum tank, which can suck the sludge/ water/ solids from outside to the vacuum tank through the suction port ( material). At the same time, the compressed air is discharged from air vent port . During suction ,air intake valve should be open, air vent valve should be closed. Suction valve should be open, and discharge valve should be closed. There is a timer setting inside the control panel, by which the user can set proper suction time and discharge time according to their experience and material conditions. There are 2 working mode for option, one is automatically operation, one is manual operation, the user can select as per their requirement. Under automatic mode, the vacuum pump will suck and discharge as per the setting time automatically.

The discharge process is that once suctiton process is finished as per the setting time, the suction valve is closed and discharge valve is open. The vacuum tank valve is closed as a close tank, the air enter into the pump body and push the sludge / fluids/ solids to discharge port, and the air flow out of the pump body.
If you need more information or working video reference of our vacuum pump , pls contact with GN solids control.

GNLW764A-VFD decanter centrifuge with dewatering unit are delivered to our TBM engineering client for TBM slurry separation, the big bowl big volume decanter centrifuge GNLW764A-VFD is the biggest model we can produce right now, the technical specification is as below:

Bowl diameter: 760mm, bowl length : 3328mm, the designed treating capacity is 528gpm, max bowl speed s 2650rpm, normally used 2200rpm, max G force is 3000G, the typical G force is 2060G,the gearbox torch is 25000N.m. with gearbox ratio 38:1, the differential speed adjustable from 5 to 28 rpm, the main motor power is 160KW, the back drive motor power is 90KW, the mechanical separation cut point is 2 ~ 5 microns.

To get more pure water and drier solids discharged, the user can add flocculants to the mud with chemical dosing unit GNDW-6000L, which with treating capacity 6000L/h. the chemicals can be added into the 3 compartment chemical mixing tank, which with mud agitator, to mix the dry powder with water, the mixed chemicals are feed to decanter centrifuge feed tube by the chemical dosing unit, we have 2 units in the system, one for use, one as back up. The mixed chemical are mixed with slurry in the decanter centrifuge feed tube and separated by the decanter centrifuge, the chemicals can improve the separation efficiency and get more clear water and much drier solids, the water can be reused by TBM, the solids can be colleted by bag or transported by truck. All the equipments are installed inside the 20ft container, 2 containers overlay placement can save space requirement, and for convenient transportation, also it is sun proof, rain proof and user friendly design, equipped with proper windows, doors, lightings and air conditioner.

If you need a customized TBM slurry separation solution, pls contact with GN solids control.

Recently one set of 3 phase separation skid are shipped to environmental solution company, the technical configuration is as below:
1.    One unit of GNLW554ET-VFD decanter centrifuge, with bowl diameter 22 inch, bowl length is 91 inch, the designed max capacity is 600gpm, for oil sludge treatment unit with adding proper chemicals, the capacity can be expected as 15m3/h. the max G force is up to 3051G, the separation cut point is 2 ~ 5 microns, with chemicals jetting, the separation cut point is up to 1 microns. The different speed adjustable range is 0 ~45 rpm, the max torque is 12000 N.M., with main motor 125HP and back drive motor 60HP.

2.    Screw pump 2 units, one is for decanter centrifuge feeding, the other one is for disc centrifuge flushing pump.
3.    Disc centrifuge GNSD-125, vertical centrifuge, 3 phase separation for oil water and solids separation
4.    2 sets of skid, one for decanter centrifuge, one for disc centrifuge, the treating capacity of the unit is 15m3/h for oil sludge.

The decanter centrifuge installed on the centrifuge skid with screw pump with VFD control panel.
The disc centrifuge is installed on the 3 phase separation skid with flushing pump, with flushing tank to avoid solids blocking.
We can make it as a complete skid for convenient transportation, also we can make it separately for flexible connection, the client can use them for different projects if required. If they need to lift it to the jobsite, we can also make the design compact footprint.
If there is coarse solids inside the oil sludge, coarse solids separation shaker modular should be used before the decanter centrifuge separation skid, if the oil sludge with less flowability, pre-mixing tank with heating lines should be used firstly to dilute the oil sludge, adding chemicals, mixing and heating before feed to coarse shaker modular and decanter centrifuge modular.

Another set of GN hydrovac slurry dewatering system used in North America, this is not the first unit of hydrovac slurry dewatering system working in North America, according to client’s feedback, we are very pleased to improve our design and production according to client’s feedback and suggestion, our design principal is user friendly and high performance cost ratio.

The technical configuration of GN Hydrovac Slurry Dewatering System is as below:
1)    Catch hopper, to collect the sludge material dumped from hydrovac truck and feed to coarse solids separation shaker.
2)    Coarse Shaker , to separate the coarse solids, big stones and other metal materials, so that the slurry will not damage the shaker screens of the double deck fine mesh shale shaker. The submersible slurry pump feed the slurry to fine shaker.

3)     Double Deck Fine Shaker GNZS706F-SHBF, there are 2 layers shaker deck, the top screen is to separate the coarse solids, the bottom screen is to separate the fine mesh solids. GN solids control can produce shaker screens comply with API RP13C standard from API 20 to API 325.
4)    Desilter GNZJ594-12N , which is a combination unit for desilter cone and bottom shale shaker, the 4 inch desilter cone separation cut point is 20 microns. The bottom shaker screen dimension is 585x1165mm. the desilter cone is 100% polyurethane material for better abrasion resistance.
5)    Decanter Centrifuge GNLW553-VFD , with separation cut point is 2~5 microns, by using proper chemicals, the separation cut point is up to 1 microns. The decanter centrifuge is installed on the telescopic skid, a fluids catching tank is under the decanter centrifuge.

6)    Chemical Dosing Unit, the proper chemicals should be used with decanter centrifuge.
7)    Mud Tank 10369x2100x2312mm, the dimension is suitable for container shipment, with tank accessories and pipelines, the equipments installed on top of it.