1. Vanuatu KAWA project introduction
    • Material details for the solid phase in the kava herbal solution, the feed should contain 93 to 95% water, and the discharged solid phase should have a humidity of about 85%.Feed 6.5 solid content, weight ratio, processing capacity 1-2K liters per hour, not sure whether the disc stack centrifuge separator machine can be used.
    • The customer once again explained their processing process and the treatment effect they want to achieve. They don’t want the mud cake to be too dry, so they asked again about the angle of the half-cone angle.
  2. GN Two Phase Decanter Centrifuge Features of recommended model GNLW224ET
    • Description of working principle

The bowl and screw of the decanter centrifuge rotate to the same direction with a certain differential speed. The material is continuously introduced into the screw shaft, and then flies to the bowl after its speed highly increased. Under the action of centrifugal force field, heavy solid phase is deposited on the bowl wall to form sediment layer. The solid is continuously pushed to the cone section of the bowl and discharged through the slag outlet. The light liquid phase forms an inner liquid ring, which is continuously overflow out of the bowl from the liquid outlets at the big end of the bowl Straight section of the bowl is the clarification area, and the cone section is the extrusion drying area.

2.2 T Series Decanter Centrifuge Features

The beach angle of the T Series dewatering decanter centrifuge is 8.5 Degree, which makes the decanter centrifuge cone section longer, that is, the drying and dewatering area of the decanter is longer, which is conductive to the dewatering performance of T series decanter centrifuge, and much drier solid cakes discharged. The beach angle of 8.5 degree will make the slag discharging more smooth so as to increase the amount of slag discharging.

1. Project information and background

Feed name: Brine Slurry

Solids name Mixed salts

Feed quantity (slurry)5.0 (max. 8)m3/h

Feed density (slurry)1350 kg/m3

Liquid name Brine

Liquid composition (weight) **):NaNO3: 26%;NaCl: 5% (max: 10%)

Solids Flow1000 (max. 1100)kg/h

Liquid viscosity0.7 – 1.0

Liquid density at O.T.1’250 kg/m3

Solids content (weight)15 (10 – 25)%

Solids density (crystals) 2’000kg/m3

Solids particle size (RRSB)d’ = 0.004 – 0.4

Solids shape cubic

Operating temperature 60°C

Operating mode:continuous 24h/d

2. GN recommended Decanter Centrifuge Model is GNLW364ET

2.1 Applicable Material for T Series Decanter Centrifuge Model GNLW364ET

Drilling mud, environmental protection sewage, oily sludge, cutting fluid, sand washing water, mineral washing water, soda white mud, salt mud dewatering, magnesium aluminum emulsion, steel-making wastewater, precision casting wastewater, construction mud, tunnel mud, mine wastewater, industrial wastewater, organic wastewater, aquaculture wastewater, chemical industrial wastewater, printing and dyeing wastewater, municipal sewage, river sludge, water plant sludge, lake sludge, kaolin grading, calcium carbonate, bentonite, Silica, titanium dioxide, calcium sulfate, barium sulfate, conductive film glass polishing solution, aluminum hydroxide, cryolite, silicate, oil sand separation, landing oil, oil sludge, coal tar, inorganic fertilizer, Chinese medicine extraction such as taxus chinensis, honeysuckle and liquorice, clarification, concentration and dehydration of salt crystals, etc

2.2 GN dewatering / Thickening decanter centrifuge is T series decanter centrifuge with beach angle of 8.5 degrees. GN T series decanter centrifuge is usually used dewatering and thickening purpose. It is widely used for maximum dewatering requirements of municipal and industrial wastewater sludge. The dewatering decanter centrifuge is designed for easy separation material include large particle size, high density difference of solid and liquid, low viscosity, high concentration, high treatment capacity and higher dryness than clarity. The materials like sludge or wastewater containing fine particles usually need to be added with flocculants to gather the fine particles condensed into large ones, and then dewatered with T series decanter centrifuge.


1.Project back ground and Information

SCG packaging execute pulp, paper and packaging product in Thailand and ASEAN there are various waste water treatments in Banpong location.

Regarding to above subject, currently studying in dewatering equipment to handle excess wastewater sludge from both primary treatment and biological treatment.

  1. Requested dewatering unit with following enquiry specification
    • Feed rate: 100 m3/hr
    • Sludge concentration: 5 %
    • Volatile suspended solid (VSS) :55%;
    • PH: 5 – 6.8
    • Operation hours per day:24 h/day
    • Sludge type / ratio:100% Bio sludge
  2. Expected Performance
    • Sludge loading ~ 36 TonDS/day
    • Sludge cake Dryness :80%
    •  Polymer consumption: pending
    • Power consumption:pending
  1. Proposed GN Decanter Centrifuge Model GNLW764A performance and features
    • Feeding Condition:Waste peper miliing water 100m3/hour with 2% solids by mas
    • Capacity:55 m3/h
    • Bowl Length:3328 mm
    • Bowl Diameter:760 mm
    • Max Bowl Speed:2650 RPM
    • Max G Force:3000G
    • Main Drive Motor:132KW
    • Screw Drive Motor:75KW
    • Bowl Material:Duplex Stainless Steel SS2205
    • Weight:14911.88Kg
    • Dimension:6098*1950*1912mm
  1. GN Decanter Centrifuge Model GNLW764A performance and features

3.1 High Quality Technology Ensures Quality

The precision machining adopts CNC equipment, with high precision and good consistency.

After each main rotary parts are machined by high precision CNC equipment, the centrifuge is treated with three dynamic balance processing again, including the 1800RPM medium speed dynamic balance in the main rotary body component, the actual working speed high speed dynamic balance for screw and the whole machine balance, so as to ensure the stable operation of the centrifuge under the high speed working condition.

3.2 The bowl Assembly Adopts High Level Stainless Steel Material

  1. The shaft caps on the two ends and the bowl are made of duplex stainless steel SUS2205 or SUS2304 by centrifugal casting, which is superior to the performance of SUS304 and SUS316.;
  2. The main parts are made by centrifugal casting and die forging process to avoid intergranular corrosion and incomplete residual stress release caused by traditional welding process.

1.Project introduction

The origin of the material is from sand in a wastewater flow

Material Temperature is 25 celicius & 28-29 celcius

The density of the material is Around 2000 kg/m3

The customer requested treatment capacity is 2-3 m3/h

The height between the material and pump is 15 feet

The distance between the material and pump is 20 feet

The challenge and problem of the current situation is currently they use labor to take sand out from the forebay tank of the mini hydro power plant.

The process or equipment is being used on location at present and the performance now is they use manual labor, wheelbarrows, hoes and baskets to fill and take out sand from the forebay tank. The process takes one and half days to finish completely.

The project budget is about Rs. 3 million LKR.

  1. GN recommended sludge vacuum pump model is GNSP-10B.

2.1Brief introduction

Sludge vacuum pump, also named as solids transfer pump. It is a type of pneumatic pump that sucks the material with vacuum produced by air operation, and then converts to positive pressure for discharging.Most of the solids, sludge and liquid could be transferred by using this pump. With special structure design of no rotating parts in the cavity, it can be used at tough environmental with high working performance and less maintenance. The pump can transfer material with high gravity and high density, solids content max.up to 80%. It has following features: the high efficiency venturi device can produce vacuum up to 25 inch HG(Mercury Column). This is equivalent to vacuum of 85Kpa to suck the material. The pump structure is simple and compact, almost none of wear parts. The transfer distance is up to 500-1000 meters.

2.2 Advantages of GN sludge vacuum pump.

Air operation, no need electric power, suitable for hazardous area application.

Powerful self-suction with long transfer distance. Suction distance up to 50 meters, discharge distance up to 500-1000meters.

Widely application for transferring liquid, wet sludge and solids.

Transferred solids size Maximum50 mm or 75 mm, sludge solids content up to 80%.

Compact structure for easy to move.

None of rotating parts inside the cavity, less wearing for long lifetime.

Automatically and continuously working is available with easy operation and maintenance.

1.Project Introduction

1.1 Makeup of Original Material:Solid in extraction liquid

1.2Solid Particle Size Distribution:1-50 micromet

1.3 Final user Required Hourly max Capacity:1.5m3/h

1.4 Liquid Composition:No explosion, liquid is water and ethanol

1.5 Customer required electric system specification:220V/380V

1.6 Site Location:No. 37 DC7 street, Son kyward, Tan Phu Dist, HCMC Viet Nam

1.7 Final user name: GOLD SEAL MACHINERY CO.LTD

2.GN Tubular Centrifuge model GNGQ142G introduction

2.1 High Speed Tubular Centrifuge is a kind of fine separation equipment, which is especially suitable for the solid-liquid separation of suspensions with thin concentration, fine particles and small solid-liquid weight difference, or liquid-liquid-solid separation. It is necessary equipment for Industries of pharmaceutical, food, chemical, and biological products, fermentation broth, beverages, blood products, etc.

High Speed Tubular Centrifuges is artificial slag removal equipment, and the processing capacity is limited, so it is generally used for working conditions with low solid content and relatively small processing capacity.(GNGQ) Clarification Type Tubular Centrifuge

2.2 The centrifuge rotates at a high speed to reach a suitable working speed (the speed can be adjusted by the electric control panel), and the feeding inlet is continuously fed from the bottom, and a certain feeding pressure (greater than 0.05Mpa) is required.

The specific gravity of liquid phase in the feeding inlet is lighter, and it gradually spirals upward from bottom to top to continuously discharge from the clear liquid outlet at the upper part of the rotor.

2.3. The specific gravity of solid phase is relatively heavier, and it settles inside the rotor. After the solid is collected and full in the drum, the machine stops, and the rotor is manually removed for slag cleaning.

2.4. After the slag removal is completed, the rotor needs to be installed and reset, and then the next separation process begins.

This process can achieve solid-liquid separation.