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Compressed dry air is a vital utility for operating any chemical plant. To minimize the danger of explosions dry compressed air is often the best way to keep your equipment running. More than one third of Delair® installations are installed for the petrochemical industry.

Instrument air

Used for operation of pneumatic instruments in plants, this solution prevents e.g. excess moisture, which can result in condensation or ice formation, and the resulting loss of control of the instrument readings and leading, at worst, to a costly shut-down of the complete plant.

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Pneumatic tools

Pneumatic tools are widely used in assembly work. They rely on a supply of clean dry air as excess moisture can lead to a high rate of tool wear and failure.

Transport air

Dry compressed air is used in many systems for the transport of powdered or granular materials, such as soap or detergent powder, hops and urea. The air must be reasonably dry or the material will absorb moisture, cease to flow properly, causing the system to become blocked.

PET plants

PET, or more correctly polyethylene terephthalate, is a plastic developed specifically – and now used almost universally – to make bottles for carbonated soft drinks. The raw material – usually supplied as PET pellets, is extremely hygroscopic, making it too wet to use on delivery. The first stage of the bottle-making process is therefore to dry the PET by passing nitrogen gas through it prior to the actual molding process.

Off Gas Drying in PTA Plants

The “off-gas” stream leaving the process of a PTA (Purified Terephthalic Acid) plant, is used as inert gas for all powder conveying, equipment purging, tank blanketing and bulk powder aeration operations, and must therefore be dried.

Aromatics plants

During operation, the catalyst bed of an aromatic plant must be regenerated. This process removes coke from the catalyst. Water and carbon dioxide are generated during the burning. A condensation and drying stage ensures the gas fit to be recirculated to the reactor as regeneration gas.