Mobile Sand Separation Unit

Application for Sand Seperation at Lagoons / Ponds or Tanks

The Sand Separator is a self-contained towable device that is designed to separate sand content from the incoming flow. This sand separator could be used for wide variety of applications including waste water treatment (industrial and municipal), storm sewage, drilling sludge etc. Sand Separator is capable of removing up to 90% of the sand contained in the incoming feed flow regardless of sand particle size. This is accomplished using a large capacity, sand stacking hydro cyclone discharging its underflow into a inclined screw classifier. The classifier has a heavy duty sand screw to remove sand from the unit for disposal while allowing un-wanted liquids from exiting with the sand. The unit includes feed and effluent tanks, each equipped with a pump and float operated mechanical controls to start and stop the pumps during low level conditions. In addition, the feed tank has a float operated proportional hydraulic valve designed to modulate the speed of the pump being used to bring the sludge into the system helping, the operator to maintain balance in the system.

All this equipment is contained on a specially built trailer to allow ease of transportation and set up. The trailer is a semi style trailer with proper lighting and air operated spring brakes, it has four (4) manually operated jacks to level and stabilize the unit and is equipped with a hydraulically operated tilt frame to move the cyclone from its transport position (horizontal) to its operating position (vertical). All of the equipment is hydraulically driven so the unit requires hydraulic fluid to be supplied from external power source (maximum of 90 GPM @ 2500 PSI **includes supply pump)..

System Description

Process Description

During operation, the operator would set the supply pump’s control wide open and the feed and return pump controls to approximately 85% of the supply pump’s control.
Both feed and return pumps would be stopped by their selector valves and the supply pump in the tank would be running at about 90% of normal speed.
As the level in the feed tank rises the feed pump will start at a pre-determined level to begin feeding of the hydro-cyclone.
The centrifugal force created by the tangential feed into the cyclone will separate the feed into two factions, the solids and the liquids.
The liquid flow travels up the center of the vortex where it is discharged as overflow into the effluent tank where once the predetermined level is reached the return pump will start and transfer the liquid to the receiving unit.
The separated solids are thrown to the outside wall of the cyclone where they will fall to the bottom of the cyclone and be held there by a urethane flapper valve until sufficient amounts have accumulated at which point the valve opens and the solids are discharged as underflow into the clarifier/sand screw to be discharged into a waste bin.
At this point a rough balance may occur but should the feed tank level increase the proportional valve will lower the supply pump speed to automatically balance the system, if it is found that the feed tank level drops to much the operator will slow the speed of the feed and return pumps until the flows out are a little less then what the supply pump can bring in to the system, the proportional valve will then modulate the speed of the supply pump to maintain a balance in the system.
If any of the tanks levels rise to high, liquid will flow from one tank to another until the level in the feed tank becomes high at which point the proportional valve will stop the supply pump from bringing sludge into the feed tank.

Sand Separator Specification

Dimensions: 330” L X 96” W X 164” H

Weight: To be determined.
Suspension: 28,000 pound leaf spring with S cam air operated spring brakes
Wheels and Tires: 235\80-16 Tires mounted on steel wheels.
Lights and Markings: DOT approved 12/24 VDC lighting and conspicuity markings.
Jacks: 4 Ea. Manual 12,000 lb drop leg jacks (48,000 lb static each)
Feed Tank: Square open top cone bottom tank, 1,000 Gal nominal capacity.
Effluent Tank: Rectangular open top sloped bottom tank, 1,400 Gal. nominal capacity.
Pumps: 2 Ea. IDF SS hydraulic drive booster pump 300 GPM @ 80 PSI capacity.
Cyclone: 10 “ Krebs Sand MAX with sand stacker option.
Classifier: Dregs tank with hydraulic drive 17” heavy screw conveyor on 28° incline.
Hydraulically operated swing frame to transition cyclone from transit to operating position.

Hydraulic Requirements

Designed to operate as part of the Mega MACS system the Sand Separator requires use of two auxiliary hydraulic circuits for its onboard needs. In addition a third auxiliary circuit is required to power the supply pump.

When used as a standalone unit, the Sand Separator requires an external hydraulic power unit with three independent circuits (Total maximum of 90 GPM @ 2500 PSI) ** includes supply pump.

Operation Diagramm

Process diagram of Sand Separation unit.

Sand Separation unit general view.

Sand Separation unit Images

Click on Image to enlarge

Mobile Sand Separation Unit

​​