NESL - Tank Cleaning and Sludge Handling Mover Equipment

Manway Cannon

Zero-man entry for tank cleaning & de-sludging operations is rapidly becoming standard practice in all European countries as well as elsewhere. NESL has developed the Manway Cannon for zero entry cleaning operations.

The latest generation of systems come completely installed inside a modified 20-foot standard ISO container divided into two compartments.  The first compartment houses the control room that is fully lined and insulated and comes with a combined heating/air conditioning unit. Within the control room are all the controls necessary for controlling the equipment. The second compartment houses the electro-hydraulic power unit permanently installed along with stacked reels for umbilical storage. Manway cannon units and smart nozzles where required are door mounted on lift out storage frames for ease of deployment.

MOVCAN - ROV Tracked Cannon

This system is available as an add-on for the Manway Cannon system or as a containerized stand-alone system.

The MovCan utilises a combination of the Manway Cannon system and the Mover. Our standard range of ROV`s come with a slightly smaller track base which allows for remote insertion into a tank whereas the MovCan comes with the larger, more powerful, mover track.

The MovCan requires a minimum of 2 persons to enter the tank in order to assemble the unit. Assembly is carried out right by the manway and takes approximately 20 minutes.

Once built, the operation of the MovCan is carried out from the Manway Cannon system control desk.

NESL Weir Tanks

When using any jetting system for the cleaning of large diameter storage tanks the required amount of jetting media can be greatly reduced by using a re-circulation system. We designed the NESL Weir Tank System to work solely with the NESL Cannon System and reduce the waste produced during any tank cleaning operation.

Built into an ISO 20’ standard shipping container and divided into four compartments comprising of one control/pump room and three individual tanks. The control area houses all controls for the system which can be run either from this control area or remotely from a Manway Cannon control desk. It also contains valves for modifying fluid path inside the container, pumps, blowers, electrical control panels, and lighting.

All equipment contained in the container is certified for use in a zone 1 area (ATEX Group II Cat 2). Power is supplied to the unit from a customer supplied source. The unit comes equipped with level control and automatic shutdown systems. A small compartment is built into the side of the container. This area contains the level transmitters, alarms and sounders.  With the weir tank system, a combination of alarms is incorporated into the design whereby both flashing lights and audible alarms are used.

ATC Mud Cannon

ATC Tank Cleaning System (ATC) comprises three main elements:

• Wash system
• Recovery system
• Separation process.
  

The wash system incorporates an operator control station, a jetting pump, smart nozzle and the umbilical which reaches between the ATC and the nozzle head.

The recovery system comprises a vacuum truck which has been fitted with a modified top manway hatch which has a floating suction installed, and the vacuum hoses between the PSV tank and the vacuum truck

The separation process starts in the vacuum truck, where the liquid and solid portions of the recovered waste are separated, and extends into the ATC where the fluids are transferred through a filtration system into the wash fluid reservoir using one of the jetting pumps. Within the wash fluid reservoir a further separation takes places using a top weir and surface skimming system to remove the oil element of the liquid transferred from the vacuum tanker.