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Preheat train

United States discoveries of, 78 597 Crude petroleum, 24 255 Crude preheat trains, 73 221-223 design methodology for, 73 223-224 Crudes... [Pg.234]

Pregnancy, exposure to organic solvents during, 23 119 Preheater rotary kiln, 25 53 Preheat trains, 23 221-223 Preinstalled piping system, in fine chemical production, 2 2 428-429 Prekallikrein, 4 86-87 Prekallikrein activator (PKA), 22 145, 146 Pre-liming, in beet juice purification, 23 459... [Pg.756]

A typical flow diagram is shown in Fig. 18.13 The desalter operation is incorporated into the preheat train of the crude distillation unit to conserve energy. Depending on the characteristics of the hydrocarbon feedstock,... [Pg.822]

The pressure in the preheat train is maintained high, perhaps 500 psi, to prevent vaporization, because the flow must distribute accurately among parallel piping as it passes through the preheat furnace. [Pg.2053]

Each side-product liquid draw goes through a steam stripper, usually equipped with 5 or 10 trays, to prevent inclusion of more volatile hydrocarbons in the product. The side-product stripper may be reboiled for sharper separation. Optimum amounts of stripping steam will often be in the order of 2% or 3% w or more of each product rate. After stripping, the side products are cooled in the preheat train and cooled further in water or air coolers to safe storage temperatures. Heavy gas oil and residuum products often go to downstream cracking processes without cooling. [Pg.2057]

Lamboume, G.A. and Durrieu, M., 1986, Fouling in crude oil preheat trains, in Taborek, J., Hewitt, G.H. and Afgan, M. eds. Heat Exchangers Theory and Practice. Hemisphere Pub. Corp., Washington. [Pg.220]

Fouling is a very serious issue for crude preheat train in oil refining plants and it is characterized by the following root causes ... [Pg.117]

Low Velocity Low velocity can promote accumulation of fouling deposits. The desirable velocity for heat exchangers for the crude preheat train is between 6 and 7 ft/s. [Pg.117]

This K can be negative when the cleaning cost is compensated by the unit margin made from the unit miming on one preheat train. [Pg.127]

The rating assessment was conducted for heat exchangers in the preheat train and the assessment results indicated that fouling occurred, to a varying degree, to most of the... [Pg.131]

Exchanger Geometry The heat exchangers located in the terminal of the preheat train suffered the most severe fouling. Use of helical baffle bundles could help mitigate fouling much better than the shell-and-tube bundles currently used. [Pg.132]

Smeenk G, Kers T (2001) In time cleaning of the cmde preheat train, BP Nerefco Refinery. [Pg.137]

The question is What could cause feed vaporization First, hydraulic analysis was conducted for the exchangers. Comparing pressure drops between the clean condition and the measured pressure data in 1998 indicated a gap of 60 psi in pressure drops. With a gain in pressure by 60 psi in the preheat train, the feed would not vaporize even after the energy modification projects are implemented. [Pg.191]

FIGURE 10.19. Preheat train outlet temperature versus crude bubble points. [Pg.192]

For the crude preheat train in the refinery plant, three beneficial modifications are identified. Modifications 1 and 2 add a new shell to each of the feed preheat exchangers serviced by the diesel pump-around (PA). Modification 3 adds surface area to the diesel product run down heat exchanger. Before implementing these changes, it is crucial to make sure that the existing pump can handle the increased diesel PA flow and the increase can be tolerated in product cut points. These modifications can save 47 million Btu/h of fuel in the crude heaters, equating to cost savings of 2.3 million per year. With only a 2.2 million installed cost, this project provides a fast payback. [Pg.488]

Preheat Train, Crude Heaters, Crude Tower, Atmospheric Flash Tower, Syn Tower, HCC Heaters, Reactor, Kiln, Steam Coils, Air Blower, Cyclone, Main Fractionator, Unsaturated Gas Plant... [Pg.260]

Preheat Train, Heaters, Atmospheric Tower, Vacuum Tower Heaters, Compressors, Pretreater, Reactors, Flash Drums, Depropanizer, Naphtha Splitter, Absorber/Deethanizer, BTX Complex... [Pg.260]

The main applications for Spirelf so far have been oil refinery preheat trains for CDU, VDU, FCC, water treatment feed exchanger HDS units, and also high-tube velocity applications as foimd in reboilers. [Pg.352]

The main applications for Turbotal so far have been in the preheat trains of oil refinery CDU, VDU, FCC units, and water treatment exchangers. Maximum tube-side velocity up to 7 ft/s, but can not be back flushed or sustain reverse flow for cleaning as that would un-hook the turbotal coil. [Pg.353]

Crude preheat train, with crude on tube side or sometimes on shell side (see next section)... [Pg.358]


See other pages where Preheat train is mentioned: [Pg.243]    [Pg.102]    [Pg.243]    [Pg.98]    [Pg.364]    [Pg.1209]    [Pg.2055]    [Pg.2055]    [Pg.136]    [Pg.228]    [Pg.114]    [Pg.117]    [Pg.117]    [Pg.118]    [Pg.128]    [Pg.131]    [Pg.131]    [Pg.132]    [Pg.134]    [Pg.191]    [Pg.191]    [Pg.191]    [Pg.489]    [Pg.201]    [Pg.494]    [Pg.521]    [Pg.1180]    [Pg.361]   
See also in sourсe #XX -- [ Pg.60 , Pg.81 ]




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