Month: April 2023

This week GN separation participate in 2023 IE expo Shanghai China environmental show.
The exhibition time: April 19th to 21th
GN stand No.: N4-H46 (Hall 4)
For more information of the exhibition, pls refer to the official website: https://www.ie-expo.cn/Home
What equipments GN showed at 2023 IE expo Shanghai China environmental show?

GN Industrial decanter centrifuge
GN can produce different diameter, different bowl length, different beach angle decanter centrifuge, including 9 inch bowl, 14 inch bowl, 18 inch bowl, 22 inch bowl, 30 inch bowl, for industrial waste water treatment.

GN Solilds transfer pump
The solids vacuum pump is an ideal equipment to transfer the slurry with high density, high viscosity, and suitable for long distance transfer, it is normally used to transfer the oil sludge from waste pit or suction directly from oil tank bottom to oil sludge treatment system.

GN oil sludge shaker
A coarse solids separation shaker is applied before oil sludge decanter centrifuge, the function is to remove coarse solids, reduce solids content, and ensure the feeding fluids to decanter centrifuge meet the feeding requirement, and not damage/ block the decanter centrifuge.

GN oil sludge decanter centrifuge
The oil sludge treatment decanter centrifuge is a 2 phase separation decanter centrifuge( solids and liquid separation) or 3 phase separation decanter centrifuge( oil, water and solids separation) or 3 phase disc separator ( oil, water and solids separation), GN sales engineer will select proper model centrifuge as per the treated material and treatment target. To archive better result, chemical additives is recommend to use with the oil sludge centrifuge.

If you did not have a chance to visit this show, welcome to visit our facilities in Langfang, China, which is nearby Beijing International Airport, also we will show our lastest technology equipments in our factory.

GNLW764A-VFD decanter centrifuge is a big bowl high volume decanter centrifuge produced by GN, it can be widely used for dredging slurry separation, TBM slurry separation and other type waste water treatment as dewatering centrifuge, which required a higher treating capacity in the project.

The technical specification of the big bowl dewatering centrifuge is as below:
The bowl diameter is 30 inch, the bowl length is 131 inch, and max designed speed and max G force is 2650rpm and 3000G. The designed water treating capacity is up to 1254gpm, adding with chemical additives, the dewatering capacity is up to 50m3/h.

The bowl and screw core shaft are made of duplex stainless steel SS2205 or SS2304 by centrifugal casting, the major components are made of by centrifugal casting and die forging process to avoid intergranular corrosion and incomplete residual stress release caused by traditional welding process. The solids outlet and fluids outlet port is protected by replaceable hard alloy sleeve. The liquid outlet weir height is adjustable according to different working conditions, if you need to improve the treating capacity, then the solids dryness will be reduced, and fluids clean will be reduced. If you want to keep the discharged solids dryness, water clean, just adjust the weight height plate with a balance according to your requirement. The bearing lubrication system of thin oil circulating oil station is applied for the big bowl decanter centrifuge, for heavy load and high speed operation, the good oil lubrication system with good cleaning and cooling functions could improve the service life of SKF brand bearings obviously.

The VFD control panel adopted with the dewatering centrifuge is with stainless steel material cabinet, PLC smart control and touch screen from Siemens or other famous brand, world famous brand VFD for main motor, back motor and feeding pump motor.

The tank cleaning system consists of tank cleaning machine and the tank cleaning sludge treatment system.
The tank cleaning machine is developed for cleaning tanks in hazardous areas, which provide better cleaning efficiency with minimal use of time, energy and cleaning media.
The tank cleaning machine consists of two main part, one is washing unit, the other one is portable air driven unit. The typical application of the tank cleaning machine will be for crude oil storage tanks, large process vessels and fermenters, large silos and dryers, large reactor, large uni-tanks.

The working principal is as below:
The cleaning media flows through the machine to the nozzle and out of the tank, with high pressure jetting to the tank. This jetting cleaning will create a criss crossed pattern on the tank walls, covering 360° of the tank. The first cycle will create a wide pattern, Pre Wash, on the tank walls, the following cycles will dense the pattern until a full program is reached after 4 cycles.

After cleaning, the sludge will be treated by automatic tank cleaning system, it is a continuous process with waste water cleaning capacity up to 30m3/h, the treated water can be back to high pressure tank cleaning machine for tank cleaning reuse. The process will minimize the consumption of water and manpower involved.
The tank cleaning system can be designed as a skid mounted system or divided into 3 modules according to the job site layout, the explosion proof standard could be as CNEX zone 1 application, ATEX or IEC EX for different applications. The automatic tank cleaning system including strainer, suction pump, chemical dosing unit, static mixer, electric control system, inclined plate clarifier, membrane pump, etc. If you need a tank cleaning unit for onshore or offshore project, pls contact with GN solids control.

We can use both 3 phase decanter centrifuge package and 3 phase disc separator package for oil sludge treatment, the pre-treatment equipment for both of them are shale shaker for primary screening of coarse solids. We will select proper 3 phase separation package according to client’s requirement and oil sludge conditions.

The comparison of 3 phase disc separator and 3 phase decanter centrifuge is as below:
The max G force of 3 phase disc separator is up to 12000G, but for 3 phase decanter centrifuge is up to 3000G.
The 3 phase disc separator will be used after 2 phase decanter centrifuge or 3 phase decanter centrifuge. The treatment result for oil on solids , water in oil, oil in water is in high level.

The 3 phase decanter centrifuge can be used separately after primary screening of coarse solids, if the budget is limited, and the treatment result of oil on solids, water in oil, oil in water is not high.
The operation of 3 phase disc separator is complicated and need cleaning frequently, but operation of 3 phase decanter centrifuge is more simple with automatic cleaning. So if the user need to get high quality oil and water, and no limit for the investment, 3 phase disc separator package is proper option. If the investment is low and less quality oil water is required, we will select 3 phase decanter centrifuge package.
Except for 3 phase disc separator package and 3 phase decanter centrifuge package, GN also provide accessories for them, including vacuum pump package to pick up the oil sludge, pre-mixing tank for pre-treatment including chemical jetting, heating and mixing, coarse screening module, chemical dosing unit and oil water storage tank, etc.
If you need a customized oil sludge treatment solution, pls contact with GN solids control.

All the GN solids control produced equipments can be integrated into system designed for specific applications, such as drilling fluids processing system, dewatering system, drilling cuttings treatment system, and other waste management system. The closed loop processing system can be used for both onshore drilling and offshore installations, remote area, processing plants, in-plant installations, and the site remediation projects. The equipments used for closed loop processing system including primary shale shaker, desander, desilter, mud cleaner, decanter centrifuge, feeding pump, mud agitator, mud tank, vertical cuttings dryer, high G drying shaker, screw conveyor, waste centrifuge, etc.

Firstly the used drilling fluids flow to primary shale shaker to separate the drilling cuttings out and collected by screw conveyor, which will be transferred to vertical cuttings dryer or high G drying shaker, for solids separation and coarse solids separation, the fluids drop into the intermediate tank and the screw pump will feed the fluids to decanter centrifuge or dewatering centrifuge for fine solids separation, the treated water will be transfer back to solids control system.

The decanter centrifuge can be used to treat both water based mud drilling waste and oil based drilling cuttings treatment, after treated by vertical cuttings dryer and high G drying shaker, the fluids mixture can be treated by decanter centrifuge. The treated water can be reused to prepare for new drilling fluids, the solids can be collected for landfill or for other treatment, then the system is operation as a closed loop processing system. If treated by dewatering centrifuge by adding chemicals additives, the discharged water can be sent to waste water treatment facility for final disposal, and the discharged solids will be sent to thermal desorption unit for further treatment for final disposal.
If you need a customized design closed loop circulation system, pls contact with GN solids control.