A division in Gemwater is focused on the separation and treatment of waters present in crude oil.
Crude oil dehydration/desalting process consists in the separation of the aqueous phase present and in the preventive dissolution of salt crystals by adding water and then eliminating it.
Separation mechanism is the coalescence of water droplets obtained by effect of an electrostatic field which causes movement of the particles and consequently collision, rising to the formation by coalescence of a single larger drop which will thus decant with greater easiness on the bottom of the separator.
The overall dehydration/desalting units reduce free water content down to 0.15 ÷ 3 % and consequently the content of any salts in the oil by the following typical operating sequence: a dehydrator is used to remove large quantities of water from the oil stream and is often the first stage; a desalter performs the same basic function as a dehydrator, but here fresh water is injected into the oil stream mixing with the oil stream to dilute the saline formation water.
To follow one of the technology to be applied:
Oil and Gas
Once separated these components shall be processed in order to obtain a safe and economical storage of oil and gas and/ or transport by pipeline, tanker or truck.
Therefore the production of Oil & Gas involves a number of surface unit operation between the wellhead and the point of delivery. These operation are called field handling or oil processing.
Oil processing includes also water treatment which involves the produced waters for reinjecting for formation flooding or reservoir-pressure maintenance.
Oilfied operation includes as principal:
• Dehydration Desalting
• Sweetening
• Gas removal
Some of the processes involved in this market are listed to follow:
The purity of bulk materials is a critical factor in the quality of the end product. Elutriation is a process to separate contaminants solids particles from the flue gas. The process efficiency of this filtration depends on solid particles characteristics: their size, shape and density.
Gemwater is able to provide the most innovative technology in powder separation from gas stream, in order to guarantee the best performance and resolve the environmental impact of emission. The most important benefits of our technology can be summarized as follows:
• A filtration rating of 1 micron absolute (eff. 99,999%) is often achieved.
• Powder emission downstream the filter (filtered gas quality) can be < 1 mg/m3.
• The specific filter elements remove the powder contaminants only on its external surface. The cartridge elements shall be made of
a particular material, resistant to high operating temperature and erosive conditions of the abrasive solids particles.
• The entrapped solids on the external filter surface will be removed at cycled time by sudden blow-back cycle and recovered
into the vessel conical bottom.
• Low OPEX costs, to operate the filter, low maintenance works , no systematic filter element replacing, no operator
attending are required.
• Due to the filter media physical characteristics as its incomparable high permeability a very low pressure drop with very
high filtration velocity is attainable.
• In case of unexpected heavy clogging of the elements it is possible to regenerate them with chemical and ultrasonic cleaning.
Gemwater installed similar filters successfully to recover the catalyst (very expensive material) from the flue gas, coming from Fluidized-Bed Catalytic Cracking (FCC) and at the same time to recycle the filtered gas (nitrogen in that application) to process refinery.