TiPSS TECHNOLOGY. Pressurized CPI (pcpi) WATER TECHNOLOGIES

Transcription

1 TiPSS TECHNOLOGY Pressurized CPI (pcpi) WTER TECHNOLOGIES

2 Cross Flow terceptor system for multiphase (pressurized) gravity separation of gas, oil, water and solids from a carrier flow. Based on Shell DEP & DEP dvantages of the pcpi system no moving parts high separation efficiency in a multiphase environment short hydraulic retention time continuous operation troduction Gravity separation is the most straightforward method of effluent treatment and is, therefore, utilized widely in industry for the separation of settling and/or floatable impurities from a carrier liquid. the majority of the cases the separators are constructed in the form of a rectangular tank at atmospheric pressure. For pressurized applications a pressure vessel is used. The effectiveness of such a tank depends theoretically upon its net separation surface () and the amount of water to be treated (Q). The ratio Q/ is called the overflow rate. The rising or settling velocity of a discrete particle with a diameter d can be indicated by Stokes law: 2 V = 200g ρ ρ d s ( ) liquid µ particle Main Phase Secondary Phase (Light) low installation and transportation costs Vs = sedimentation (floating) velocity [m/h] standardized construction custom made sizes minimum maintenance costs; high rigidity uniformity in design guarantees g = gravity constant [m/s] p = density phase [kg/m] d = particle / droplet diameter [m] Performance oil globule cut off diameter: µm oil removal: 90 - >99% typical effluent O&G levels: ppm (free and separable oil) TSS removal: 80 - >90% Picture Plate pack installation µ = dynamic viscosity [kg/m.s] ll particles or droplets having a settling or flotation velocity Vs>Q/ are fully intercepted, while a portion of the smaller particles will be captured also in a ratio of (d/ds)² x 100%. 120 SEPRTION OF OIL DROPLETS Secondary Phase (Heavy) free gas: 95 - >99% pplications oil and gas fields (3-phase, 2nd stage separation, crude dehydration) offshore platforms oil terminals tank storage areas oil refineries revamps, debottlenecking Percentage removal VWT - MPP Systems offers a wide variety (gravity based) separation equipment, like the pcfi. Pressure Cross Flow tercep tors are applied to separate two or more immiscible liquids, solids and, when present, gas in a vessel at moderate or high pressure simultaneously. the pcfi separator the continuous phase flows horizontally in a direction perpendicular to that of the particles to be separated. petrochemical and chemical industries oil spill clean-up ballast water 0 0 0,5 1 1,5 Separation efficiency for d < ds d/ds Droplets equal to or larger than de design diameter are 100% intercepted. Plate packs are installed to improve separation efficiencies and/or to enlarge the separation capacities of existing separator vessels. Packs can be mounted without hot work in this existing vessel when necessary. Figure Separation efficiency curve settling particles

3 Which amount of plate pack separator surface to choose? determining a design, the following minimum data are essential: the type of phases to be intercepted/segregated the separation diameter, or even better the particle size distribution the difference in density between the carrier liquid and the phases to be intercepted the (maximum) amounts of each phase to be treated other physical data (temperature, viscosities) origin of the liquid physical data, chemical analysis of carrier phase and secondary phases. Selection of pcfi plate packs Each process flow has its own individual characteristics; one phase in the other can occur either as a dispersion, an emulsion or a solution and the particle size distribution differs from case to case. For this reason, specific process analyses and design calculations must be made for each individual application. It is fundamentally impossible to separate dissolved or dispersed components from the aqueous phase by means of gravity only. ( physical-chemical treatment or biological treatment, might make this however possible.) Liquid data like salinity, temperature and ph determine the choice of materials, most often stainless steel. n example of the following plate pack configurations can be found below. Gas Process Flow description pcfi system The principle of a horizontal pcfi is shown in figure in the pane The blend of phases flows into the separator through a flow stabilization and primary bulk separation compartment (1). distribution baffle (2) induces the incoming water to flow evenly and uniformly to the entrance of the plate pack (3). the plate pack, the secondary phase and, if present, other discrete phases, are intercepted. They leave the pack in a perpendicular flow direction and collect respectively beneath the pack in the heavy fraction collection zone (6), or on top of the pack in a light fraction layer (7) or gas zone. The settled material is discharged intermittently with the aid of pneumatic operated valves into a sludge collection vessel. The floating oil layer is discharged via an oil weir (4). The gas is discharge via the gas outlet (5). Veolia Technologies scope of work can be: turnkey deliveries recommendations design engineering erection installation commissioning start-up after sales laboratory and field research The main phase leaves the pack at the back of it and is discharged over an adjustable weir (8). pilot plants - Figure Fully flooded 2-3 phase separator, transversal main flow Figure Partially filled 3-4 phase separator, transversal main flow - schoepentoeter gas phase out LL 5 Gas 1 2 IL oil sump 8 water sump aqueous phase out 6 Out hydrocarbons out - Figure Horizontal three phase gas-hydrocarbonwater separator Figure Fully flooded 2-3 phase separator, crosswise main flow Figure Partially filled, 3-4 phase vertical separator, crosswise main flow Separation vessel with two plate pack sections Figure Workshop assembly 3-phase pcpi Small size, skid mounted pcfi oil/water/gas separator

4 TiPSS Hydro Fluoric lkylation Unit (HFU) refinery upgrade packs Veolia Technologies designs acid settler internals. The acid settler internals design done by Veolia serves to optimize the segregation of hydrofluoric acid droplets from a continuous flow of alkylate. While the HF catalyst phase is collected in the common acid boot the TiPSS separator plate pack is used to maximally segregate suspended HF droplets from the light oil phase. The unit is used in the process to convert low molecular weight alkenes into a high octane gasoline component. Veolia Technologies holds the knowhow for design, engineering and manufacturing of the special material plate packs that enhance the separation process. Optional computational Fluid Dynamics can be done to verify the design needed to be able to meet clients performance requirements. TiPSS HF cid settler plate pack pplications TiPSS HF alkylation unit refinery Italy The lkylation unit, converting low weight alkanes into High Octane fuel, is a critical unit of the refinery. It uses a strong corrosive acid Hydrofluoric (HF) as a catalyst. The small droplets of HF in the hydrocarbon mixture are removed in the acid settler. Veolia Technologies holds the knowhow for design, engineering and manufacturing of the special material Plate packs that enhance the separation process. TiPSS pcpi 2-Phase Oil Separator TiPSS pcpi 3-Phase Oil Separator Gravity oil, gas and solids removal from oil produced water. The system was designed for a 1000m/h feed flow. Scope of delivery compromised of a dual plate pack separation internals. Services supervision and commissioning were provided at site. Figure Collapsed and new plate pack Our Client discovered the collapse of the existing Plate Pack in their 6000mm diameter Pressure Vessel during a Turnaround inspection. Being a critical item, time is from the essence. Veolia Technologies - MPP Systems made a redesign of their original design of 1999 to enable the fast track manufacturing of a retrofit. The Plate Pack was customized to fit the existing vessels internal clips as no welding on the vessel was allowed. The delivery time from the initial phone call by the Client up to the ex-works delivery of the 2 Plate Packs of 7 tons each was 2 weeks! Normally these projects take 4-9 months depending on client requirements and specifications. Gravity oil and solids removal from oil produced water. The system was designed for a 200m/h feed flow. Scope of delivery compromised pressure vessel, separation internals, instrumentation, valves and pumps. Services supervision and commissioning were provided at site. Figure new plate pack

5 Veolia Technologies Techno Center Netherlands B.V. Celsiusstraat 34, 6716 BZ Ede, The Netherlands P.O. Box 250, 6710 BG Ede, NL Phone: Fax: Veolia Technologies Communications - 06/2017 (170206) - Photos: Veolia Pictures Library