GN sludge dewatering screw press for Indonesia emulsion and resin project

1.Indonesia emulsion and resin projectbackground and introduction

The dryer would be dewatering mixed raw wastewater from 2 sources: emulsion and resin production which has a sticky character. The TS is high (around 10%) but it is still flowable.VTS is 98% and 82%, which means the wastewater does not have much inorganic content. Overload and sludge blocking did not happen at the pilot test. Flocs were formed and sludge cake was produced. The filtrate of the emulsion waste was pinky (dirty) We assume that this could be improved by polymer dosing adjustment.

Treatment capacity requirements by this project: 30 kg-DS/h for Waste activated sludge /Raw wastewater at TS 1%

2. GN sludge dewatering screw press model GNDL-301 features

2.1 Introduction of GN screw press sludge dewatering machine

This is a kind of economic and environmental friendly sludge dewatering equipment. It is a new type of sludge extrusion dewatering equipment by using the principle of screw extrusion, through the strong squeezing force generated by the change of screw diameter and screw pitch, and the tiny gap between the floating ring and the fixed ring, to realize solid-liquid separation.

GN dewatering screw press is composed of fully automatic control cabinet, flocculation modulation box, sludge thickening and dewatering device, and liquid collecting tank. GN dewatering screw press is with automatic control technology, which can realize the flocculation fully automatic operation, and continuously complete the sludge thickening and squeezing, finally return or discharge the collected filtrate liquid.

GN screw press dewatering machine is widely used in sewage treatment projects of municipal, aquaculture, food, starch, oil, pharmaceutical, chemical, paper, leather and other industries

2.2 Features of GN screw press dewatering machine

Suitable for wide range sludge dewatering and can be used for oily sludge treatment.Operating continuously and automatically, not easy to block. Low investment and operation cost, no secondary pollution.Energy saving and environmental friendly, compact design with small footprint.Sludge can be dewatered under aerobic conditions to avoid phosphorus release from anaerobic sludge dewatering.

GN sludge vacuum pump for Philippines HYM Oil sludge transfer project

  1. Philippines HYM Oil sludge transfer project introduction

Slop oil treatment design capacity requirement:5-8 m³per put parameters:Oil:50%,Water: 40%,Solid: 4% by w/w.

Purpose of this project: first stage: exhibition and presentation to potential clients and end user2.Next stage, for pilot sample testing and fesibility verification.

Features and Benefits

1.1 Air Operated to run manually or automatically. Eliminate the danger of electricity.

1.2 Dual Function: Capable for Suction and discharge

1.3 Suitable for clean-up jobs of liquid or mixture of liquid and solids as well as the powder solids.

1.4 Mobile wheels design for easy movement.

1.5 Save manpower, one person is enough to do the clean-up jobs efficiently.

1.6 Optional of different type of suction tools for different conditions.

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.

GN Oil sludge treatment system for Malaysia Oil slop oil separation project

1.Malaysia slop oil separation project introduction

1.1 Slop oil treatment design capacity requirement:5m³per put parameters:Oil: 10 – 60%,Water: 40 – 90%,Solid: 5 – 20%.

1.2 Weight & Height:Weight & height of machinery and container to comply with regulations set by Malaysia’s Road Transport Department.All equipment system needs to be in containerized

1.3 Sub-total of pre-treatment & heating module unit,Sub-total of sludge separation unit,Sub-total of miscellaneous items.Technical Standards: British/ASME Standards

Electrical Standards: MS IEC 60038 (to comply with Suruhanjaya Tenaga) ATEX Explosion proof Zone 1 to be mobilized into Oil & Gas refinery

2. Main separation treatment process of GN oil sludge treatment system

Main separation treatment equipment of the oil sludge treatment system is the three-phase decanter centrifuge GNLWS364-VFD. Its operation is based on the principle of sedimentation, that is, solid particles with specificliquid weight precipitate in a predetermined time. This principle can also be applied to two immiscible liquids with different specific gravity. When the material enters the high-speed rotating drum, the material rotates synchronously with the drum. Because of the different specific gravity, the centrifugal force is different. The solid particles with the larger specific gravity are subjected to the greatest centrifugal force, followed by the heavy phase liquid (such as water) and the light phase liquid (such as oil). So the centrifugal force is becoming less from outside to inside according to the magnitude of centrifugal force. A concentric solid layer and two liquid layers are formed. Solids are pushed out by the screw conveyor, and liquids are removed from theirrespective nozzles. Therefore, the application of three-phase decanter centrifuge can not only separate the solid in the material, but also separate the two-phase liquid with different specific gravity in the material, that is, Solid-liquid-liquid separation can be achieved.

GN Two Phase Decanter Centrifuge for Vanuatu KAWA Project

  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.

Separation of mixed salt crystals form mother liquor by GN Decanter Centrifuge in India project

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.