Month: March 2023

1. Project introduction

1.1Customer Project Plant Address：Sarangani Energy CorporationKamanga Agro Industrial Econominc Zone Brgy. Kamanga, Maasim, Sarangani Province, Philippines 9502

1.2 Customer requirements:

For Sludge concentration, image below shows 40 to 80 % moisture.

Particle size range of 500 to 800 microns (average) sludge of aluminum based coagulant

75% Calcium coagulation sludge and 25% lime softening sludge. Other use : sand silt (50% moisture),29degC for material and 32degC for Ambiet

2.GN solids/sludge vacuum pump Model GNSP-40B introduction.

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

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

Customer plan to use humprey spiral and then shaking table after High Frequency Fine Vibrating Screen

And for the fine material, they plan to use advanced separator from GN to separate the fine tin in tailing.

2. GN High Frequency Fine Vibrating Screen introduction

2.1GN High Frequency Fine Vibrating Screen is a product developed by GN company, Using the principle of two-degree-of-freedom resonance, a single excitation source(dual imported vibration motors) is designed to drive the whole machine to realize linear vibration.

2.2The equipment has the advantages of large screening area, adjustable screen box angle, compact structure, excellent performance and high cost performance.

2.3 The equipment has unique vibration mode,energy saving,high screening efficiency, large processing capacity, advanced  technology, simple structure,stable and reliable operation, and is currently the advanced equipment in the field of fine-grained material screening.

2.4.This series of screen machines can use flexible polyurethane screen mesh,with high opening rate(28-45%),and the average life span is more than 6months.

3．High Frequency Fine Vibrating Screen Application

This series of equipment is suitable for wet or dry screening,classification and dewatering treatment of fine-grained materials in beneficiation, coal preparation and other industries.

4. Working Principle

The screen box assembly of the vibrating screen is arranged in a single layer and multiple sections. The working method is to use two counter-rotating vibration motors as the vibration source to force the screen mesh fastened in the screen box of the screen machine to receive the overall linear vibration transmitted by the screen box assembly. This vibration is transferred to the over-screen material through the screen mesh, so as to achieve the purpose of vibrating screening.

5. Polyurethane Screen Mesh Features

Flexible polyurethane screen is a kind of high molecular polyurethane elastomer with excellent physical and mechanical properties: high strength, high elasticity and high wear resistance. After repeated tests, the excellent formula is determined, and the product is manufactured with precision mold processing technology and unique advanced molding technology. This product is suitable for metallurgical mining, coal, non-ferrous metals and other industries.

GN Oil Sludge Treatment System is to use chemical to wash the oil sludge with heat to temperature of 60-70 C degree. After washing the slurry is pumped to GN separation equipment to separate into oil, water and solids. The recycled water can be reused in the washing process, and the oil is clean enough to sell to the refinery company, the solids contain less than 2% oil which can be sent to biodegradation or thermal unit for final disposal if needed.

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 (suchas 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.

Oil sludge sample from customer