Storage tanks , drawings

In general, the most significant process wastewaters from petroleum refining are crude oil desalting waste, storage tank draw-off, steam condensates, spent caustics, spent acids, product losses, and leaks and spills of solvents used in extraction processes. The process wastewaters, which come in direct contact with petroleum hydrocarbons, contain free and emulsified oil, sulfides, phenols, ammonia, BOD, COD, heavy metals, and alkalinity as major waste constituents. 

In larger vertical storage tanks containing residual fuels, bottom inlet filling may sometimes be used. A non-return valve must be fitted in the filling line as close to the tank as possible. The entry position of the filling pipe into the tank in relation to the position of the draw-off connection must be carefully selected to avoid air entrainment into the oil-handling system. 

Storage tanks, or daytanks, are used to hold a supply of slurry for circulation to a fab via a global delivery loop. Since slurry must be kept moving, rather than delivered in a deadhead delivery fashion, a slurry dispense engine will typically draw from a storage tank and circulate the slurry back to that storage tank, as depicted in Fig. 6. 

The EPA report describes an article that documents a history of fires in drums containing activated carbon in systems that allow air to be drawn into the drums. The reference article specifically mentions that typically, the fires have occurred late at night following a hot, sunny day when the nighttime cooling of the storage tanks causes vapor volume to contract and draw outside air into the carbon beds. 

Figure 2. Simplified schematic drawing of the extraction plant (1 regenerative pump, 2 fluid cyclone, 3 storage tank, 4 gear pump, 5 circulation gas condensator, 6 diaphragm pump, 7 heat recovery, 8 preheater, 9 heat exchanger, 10 cyclone separator, 11 feed pump, 12 feed preheater, 13 thermostatic chamber)...

Example 4.4. In the equipment shown in Fig 4.6, a pump draws a solution of specific gravity 1.84 from a storage tank through a 3-in. (75-mm) Schedule 40 steel pipe. The efficiency of the pump is 60 percent. The velocity in the suction line is 3 ft/s (0.914 m/s). The pump discharges through a 2-in. 50-mm) Schedule 40 pipe to an overhead tank. The end of the discharge pipe is 50 ft (15.2 m) above the level of the solution in the feed tank. Friction losses in the entire piping system are 10 ft-lbj-/lb (29.9 J/kg). What pressure must the pump develop What is the power of the pump ... 

The simplest thermosiphon domestic hot water (DHW) system is shown in Fig. 5. As the water in the collector is heated, it expands, beeomes lighter, moves upward, discharges into the top part of the storage tank, and draws in cooler, heavier water from the bottom of the tank. A natural thermosiphon circulation is thus developed, which gradually heats up the volume of water contained in the tank. It has been observed that this circulation exhibits... 

Methyl isocyanate, CH3NCO, was made infamous in 1984 when an accidental leakage of this compound from a storage tank in Bhopal, India, resulted in the deaths of about 3,800 people and severe and lasting injury to many thousands more, (a) Draw a Lewis structure for methyl isocyanate, (b) Draw a ball-and-stick model of the structure, including estimates of all the bond angles in the compound, (c) Predict all the bond distances in the molecule, (d) Do you predict that the molecule will have a dipole moment Explain. 

Figure 5. Typical drawing indicating zone classification of a hydrocarbon storage tank, Mariani et al. 2000. 

In the first method, demineralized water is used on eductors that draw the concentrated solutions from small storage tanks. Setting the flow of water properly and adding a variable restriction on a regenerant suction line allow the correct mixture to be sent to the beds. In the second method, concentrated regenerant is punned to a mixer where it is combined with a metered flow of water and sent to the resin bed. A ratio controller is used to obtain the correct mixture. In the last method, regenerant solution and water are... 

The System 80+ Standard Design has an in-containment refueling water storage tank (IRWST), as described in CESSAR-DC Section 6.8. The CSS draws water from the IRWST. When spray is initiated during a LOCA, spray water from the upper elevations drains through major openings such as hatches and stairwells to the holdup volume of the IRWST, where it is mixed with water spilled from the break. From the holdup volume, water overflows... 

The des tribulations and drawing for the steel sdiell only for a 55,000-bbl oil-storage tank having a cone nwf are ref uired. The cone nx)f is to be supported by internal columns, girders, and rafters. 

An office building is heated by oil-fired burners that draw fuel from a 619 gal storage tank. Calculate the tank volume in liters. 

Process Water Desalter water Excess sour water Water drawn from oil-storage tanks Accumulator draws Treating plant waste Barometric condeners... 

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