Plate heat exchangers in oil refineries and oil production

In refineries heat exchangers are used for the crude oil distillation and subsequent refining stages. GESMEX heat exchangers are used as preheaters, re-boilers, condensers, economizers and as cooler of refined products. In production sites onshore and offshore crude oil is preheated, tanks heated, gas dried and TEG regenerated.

The following examples show the experience of GESMEX in these areas:


Circulation evaporators (re-boilers) at distillation columns

Circulation evaporators are used in refineries at distillation columns to heat up the bottom-liquids and to generate steam, which is fed back to the distillation tower.
XPS - Plate & Shell heat exchangers can be configures as kettle re-boilers or as thermosyphon - reboiles. Kettle re-boilers require rather no static heights. Thermosiphon – re-boilers have smaller filling volumes and shorter reaction times. Openable versions allow the removal and mechanical cleaning of the plate packages.

Example:
Kettle Type circulation evaporator
Type:
Plate & Shell - XPS 150
Variant:
openable shell
Features:
heating medium vs. oil
Installation site:
Germany

Top condensers at distillation columns

Top condensers condense and cool residual vapors in distillation columns. They work as reverse flow condensers when they are are put directly at the column. Circulation condensers are placed near the top of the column and work as s a flow-through condensers.
XPS - Plate & Shell heat exchangers are effective condensers and well suited for both modes of operation. Of particular advantage, compared to tubular heat exchangers, is the compact and lightweight design which enables the installation close to the column head.

Example:
Top condenser for an atmospheric distillation column
Type:
Plate & Shell - XPS 200
Variant:
fully welded
Features:
Water vs. unstable gasoline
Installation site:
Russia

Economizers at distillation columns

On distillation columns but also in other stripping systems XPS - Plate & Shell heat exchangers are used to preheat the incoming fluid through the outflowing medium. Heat exchangers with such tasks are called economizers or feed / effluent interchangers.
Due to the high heat transfer coefficients plate heat exchangers generally offer themselves for economizer applications. They achieve closer temperature approaches of the hot and cold side. Moreover, in refinery processes the Plate and Shell type provides variable connections options and the possibility to use it at high pressures.

Example:
Feed / Effluent interchanger
Type:
Plate & Shell - XPS 150
Variant:
fully welded shell
Features:
with insulation, Media: stable catalysate vs. unstable catalysate
Installation site:
Russia

Coolers of refinery products

The products obtained in refineries by distillation and other processing stages are cooled prior to tank storage.
XPS - Plate & Shell heat exchangers are preferably used for cooling lighter products such as gas and light gasoline (NAPHTA), kerosene and diesel fuels. For minimum maintenance requirements the heat exchangers are configuresd in fully welded design.

Example:
Naphtha cooler
Type:
Plate & Shell, XPS 50
Variant:
fully welded
Features:
at plate-side multi-pass
Installation site:
Germany

FPSO - Floating Production Storage and Offloading Unit

FPSO used on offshore production sites to produce, storage and load oil and gas. Aboard heat exchangers are needed to heat oil tanks. Partially first stages of processing of the crude oil or natural gas takes place on board.

XPT - Thermo Plate heat exchangers, built from individual plates or plate batteries, heat oil tanks. The heating medium water can be heated itself in a XPS - steam heater on the deck.

XPS - Plate & Shell heat exchangers operate as steam heater in tank heating circuits. In combination with the XPT - heating plates in the tanks, the system has low weight and a low center of gravity for the benefit of the ship stability. If natural gas is dried on board, then Plate & Shell heat exchangers cool down the gas below the dew point or they work in the glycol regeneration as glycol coolers or glycol - economizers.

Example:
TEG - cooler
Type:
Plate & Shell, XPS 50
Variant:
fully welded, design pressure 90 bar
Features:
several passes at plate and shell side, vertical installation for venting and draining of the multi passes
Installation site:
Oilfield in the North Sea

Heat exchangers in utility systems and for heat recovery

In addition to process-specific tasks, GESMEX plate heat exchangers are also used in numerous auxiliary and utility systems, such as: heating of cleaning solutions, cooling lubricating oil, drying compressed air, jacket cooling ...

GESMEX plate heat exchangers are used for heat recovery from exhaust vapors or flash steam, in sewage systems, for heat recovery or power generation from waste gases ...

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XPS

XPS – Plate & Shell heat exchangers are highly suitable for heat transfer between liquids and gases or for evaporation and condensation duties. The gasket-free and cylindrical design allows operating pressures from full vacuum to 400bar and temperatures ranging from -200 to 500°C.

XPT

XPT – Thermoplate heat exchangers can handle dirty media and show low pressure drop even with high volume flows. The all welded plate-pairs are used from vacuum to 60 bar and from -200 to 800 °C.