Condensate system When steam or hot water (waste heat from elsewhere on the plant) are used as heat source, the condensate system (in case of steam) or water return system (in case of hot water) collects and stores the vaporizer heater bundle effluent. This effluent is checked for traces of fuel to make sure the system remains perfectly sealed. If no contamination is detected, the condensate is stored in a tank, prior to being forwarded back to the heat source for re-use.
The glycol absorber removes dissolved liquids from gas streams. The Glycol Absorbers use a solvent to remove liquids from gas stream. Mono Ethylene Glycol (MEG), Diethylene Glycol (DEG), Triethylene Glycol (TEG), Tetraethylene Glycol (TREG) and Propylene Glycol are commonly used absorbents. The absorbers can remove several types of liquids from gas streams, including: water, hydrocarbon condensate, aromatic hydrocarbon contaminants and BTEX. Glycol flows generally from top to bottom in countercurrent with the saturated feed gas. The contacting devices may be packings or trays in combination with several types of internals. Water rich glycol leaves the Absorber at the bottom of the vessel. The dry gas leaves the Absorber at the top via a demisting device to remove entrained droplets.
Inlet separator The inlet separator scrubs the feed gas to remove free liquids, like (salty) water and hydrocarbon condensate. The inlet separates these particles from the gas stream before the natural gas enters the Absorber. In case there is a large amount of water in the gas stream, it’s likely that gas condensates will form in the pipeline. These condensates can be collected in the inlet separator. Not removing these liquids from the feed gas may result in higher glycol losses, increased foaming and increases on the Reboiler duty. The Inlet Separator can be designed as a stand alone section or as an integral part of the Absorber.
Flare system Unwanted gasses and condensates can be disposed of through a flare, reducing the emission of green house gases into the environment. Substances drained from the main system can be accumulated in a slop tank, the flare is fired up when this tank reaches a given level.
Steam Heating Networks
Steam heating networks can be a sustainable alternative to heat up your processes. Petrogas is continuously looking for opportunities within the renewable markets. Recently we started to work on the construction of an award winning steam heating project ECLUSE. During the ECLUSE project are constructing a network of steam and condensate pipes between the thermal Indaver/SLECO processing plants and a number of companies in Waasland Port. This will enable the companies to purchase heat according to their own requirements. The heating network transports steam – generated during incineration – through an insulated steam pipe to those using the heat. The transport is done efficiently and without appreciable loss using superheated steam at high pressure (40 bar) and high temperature (400 °C). The hot water passes through condensate piping back to Indaver/SLECO where it is used once again as feedwater in the steam boiler. The pipelines will be around 5 kilometres long and will be laid partly underground, partly above ground. ECLUSE applies a solidarity principle for its heat extractors. The ECLUSE project won the Belgian Sustainability Award in 2016 and the Belgian Energy and Environment Award in 2017, the project realizes co2 saving similar to 50 windturbines. How much can you save at your site?