Since the first oil extraction, different concerns about the ocean pollution have been raised up. A massive collection made up of plastic and other materials are wasted in the oceans and it destructively treats residents’ health of the oceans. Polutions would be cleaned by scavenger vessels and now we want to tell you about History of scavenger vessel.
Recently the state of general awareness in regard to the potential of the extensive damage to the environment caused by the large spills of oil at sea and expanding the use of different types of plastic is increasing; as a result, various mechanical devices have been designed to separate oil film and plastic waste from the surfaces of bodies of water. Thus, the history of scavenger vessel and its preceding outlooks about them dates back to the year 2006, exactly when all these concerns were proposed as important issues. In this case, not only oil pollutions, but also environmental factors had a managing role in the history of scavenger vessel .
How scavenger vessels work
According to the history of scavenger vessels, the uniqueness of these vessels rests in its advanced Patented OxyPlus™ water decontamination system that treats and revitalizes waterways by aerating the water with a combination of ozone and oxygen. On full operation mode, the vessel scoops up floating debris, destroys bacteria, and injects life-supporting oxygen in the water. This process restores the overall health in the water. This system plays an effective role in evolution of scavenger vessels. The Scavenger Vessel on its operational mode can decontaminate at a rate of up to 20,000 gallons of water per minute and inject up to 600,000 liters of oxygen per hour.
Since its advent, scavenger vessels’ performance has greatly promoted. The primary structure of scavenger vessel has not been changed completely; however, the efficiency of vessel, as it can be study in evolution of scavenger vessels, is promoted. The key features have remained constant and have developed by engineers to be more efficient.
- Picking up the trash
As trash and water are funneled into the bow, a basket catches the debris and empties it into a large on-board containment bin.
- Debris Collector
The Scavenger Vessel features a retractable stainless steel trash basket, which is mounted on the front of the vessel. It picks up debris floating on the surface of the water. The basket’s design, which resembles a comb or grate, is engineered to virtually eliminate any water turbulence during the suction operation. The basket is emptied into a containment bin by means of a hydraulic system, which is operated from the main cabin. Continuous debris collection is ensured by a secondary grill that is automatically activated to keep debris from entering the channel while the basket is being emptied into the bin by a brief look at history of scavenger vessel there are different kinds of debris collectors which are optimized by economic and performance factors during the evolution of scavenger vessels to be more effective.
- Water Cannon
The multipurpose water cannon on the Scavenger Vessel can:
- Clean hard-to-reach areas, seawalls, or rocky shorelines
- Be used as a dispenser for dispersing agents
- Fight Fires
- Be used as an auxiliary means of propulsion Powered by an independent marine diesel engine.
- Effective Maneuverability
The Scavenger Vessel can make a 360-degree turn, in place, with the bow open and in recuperation mode. This state of maneuver can be performed without interrupting the decontamination process, using the special rear deflector that is attached to the stern of the vessel. The scavenger vessel never has to interrupt its recovery systems.
Evolution of scavenger vessels
Introduction to evolution of scavenger vessels plays an important role in understanding the operation of these vessels and finding out innovative ways to develop them, after learning about history of scavenger vessel.
Throughout the years of constructing vessels for cleaning the ocean some systems enhance and also added to these vessels which are considered in evolution of scavenger vessels.
- Dual spraying system
The boat is equipped with a dual system (right / left) for spraying chemical dispersants, approved by the Ministry of Environment.
- Divergent aft /flow inverter
Divergent aft /flow inverter that allows the boat to have a high maneuverability, especially in reverse.
For visual inspection of the aspirant system which is used to collect liquid waste.
Depending on the type of waste to collect, the pliers can be ballasted through depression to increase the draft at the bow
- The separator of hydrocarbons
This feature operates in depression conditions whilst making possible to separate the film from the pollutant mass of water suctioned in absence of emulsion.
- Collection and Disposal of floating solids and liquids
Part of the boat’s bow consists of two pliers that open hydraulically when activated from the cockpit through two levers. Whilst working at a reduced speed with opened pliers, the boat, using the propeller’s suction flow, collects the polluting material in the bow and conveys it into storage containers: the solid material is collected by an hydraulically controlled drum that works by lifting and emptying; slurry oils are collected by a surface suction system, equipped with a case for oil/water separation. The surface suction flow is generated by the propeller/tunnel system whilst closing the side doors formed on the tunnel itself, through a hydraulic control; such doors will be re-opened during navigation in order to allow the necessary water flow to the propeller. For small spots of film/oil slurry, the hull is equipped with nozzle-holding arms to spray proper liquid dispersant.
- Oxygenation of the water
The oxygenation is used to break down the iridescence due to hydrocarbons and various pollutants, by creating a mixture of water/air through a forced circulation system, which is located at the boat’s stern and utilizes the power of the water that is drawn from an auxiliary motor and then injected back into the water, mixed with air. The system is applicable when the water is subjected to atrophy and allows the restoration of normal conditions.
- Fire service
The boat can also be used as a support in case of fire within ports. Thanks to its powerful motor pump, such boat can aspire a large amount of water through the sea water circuit and then direct it on the area affected by the fire, with strong pressure, by using a shotgun installed on the stern area.