In the context of chemical tanker operations and chemical cargoes, an inert gas system may have three distinct uses: preventing a fire, preventing a chemical reaction or maintaining cargo quality. Flammable gases normally encountered in chemical tankers cannot bum in an atmosphere which is deficient in oxygen, and an inert gas is understood to be a gas used to produce such an atmosphere by displacing air. SOLAS specifies the standards necessary to do this. It may be achieved by using either nitrogen or oil fired flue gas, with a portable or fixed piping arrangement to supply the inert gas to the cargo tanks and, if applicable, the places surrounding the cargo tanks. Mandatory safety requirements for tank atmosphere control are given in the IBC Code; for example the system must be able to compensate for normal transportation losses and maintain an overpressure of at least 0.07 bar gauge at all times. Fig: Inert gas generator There are several types of inert gas systems that can be used on chemical carriers. The most common are: stored compressed nitrogen;stored liquid nitrogen;gaseous nitrogen supplied from shore;nitrogen generators using pressure swing adsorption ( PSA nitrogen generators using membrane separation;oil fired inert gas generators. There are occasions when inerting is not appropriate for safety reasons, because exclusion of oxygen could create hazardous situations with a number of chemicals when shipped in monomer form. Such chemicals (e.g. acrylic acid, styrene and vinyl acetate) have added inhibitors to prevent polymerisation. during transportation. In order to be effective, the inhibitors require the presence of oxygen dissolved in the monomer, and that oxygen is obtained from the air in the ullage space. Inhibited monomers must therefore be carried in tanks where the atmosphere has an oxygen level sufficient for the inhibitor to fulfil its purpose.
Products > Marine propulsion > Inert gas generator > Kangrim Heavy Industries Booth: Kangrim Heavy Industries Products Catalogues News using corrosion resistant steel, special paint and a rubber lining adopted to protect the equipment from severe corrosion associated with sulfur dioxide. Uses of high quality parts carefully selected on the basis of vast experience resulting in highly reliable system. After-sale services are provided expeditiously by professional engineers. Accordingly, Kashiwa's IGSs continue to enjoy a good reputation throughout the world. INERT GAS GENERATOR SYSTEM An inert gas generator system uses the inert gas generated by cooling and cleaning the combustion gas from its own oil burner to prevent explosions in cargo tanks. Kashiwa designs, manufactures and sells these systems, and has installed many of them hereto. NITROGEN GAS GENERATOR SYSTEM Chemical tankers, product tankers and tankers transporting other high-purity chemicals are required to have a supply of extremely clean inert gas to prevent explosion in their cargo tanks.
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