ocated on the shore, and portable console operator. If the load exceeds the available value the standpipe is provided with a loading-unloading operations abort system which stops pumps and cuts the coupling off.
3. Calculation of reservoirs capacity for fuel storage, selecting of reservoirs type, its equipment
At fuel delivery by water transportation is possible only in navigation period.
Reservoir capacity:
(m3);
V res - tank farm capacity, m3; n mean - average fuel consumption, kg/day; - internavigation period, days (the navigation period on river Lena is from June, 1 to October, 15);
До d - additional term of 15 days for possible internavigate period deviation, days;
До res - utilization of capacity, Крез=0,9 ... 0,95; - density of the fuel, кг/м3.
Selection of reservoirs
Reservoirs are one of the main structures of tank farms, they serve for petroleum products storage and implementation of some technological operations.arrangement reservoirs can be:
· Underground - when the highest oil product level is no less than 0,2 m lower than the lowest mark of the surrounding area;
· Ground - when the reservoir bottom is on the same level or higher than the surrounding area., there are following subdivisions:
· By material: metallic, ferroconcrete, stone, ground, ice-ground etc .;
· By excess pressure value: low-pressure reservoirs (the internal pressure slightly differs from the atmospheric one, p? 0,02MPa) and high pressure reservoirs (p gt; 0,02MPa);
· By technological operations supplied: reservoirs for low-viscous oil products, reservoirs for high-viscous oil products, sedimentation-drainages, mixing tanks, special design reservoirs for oil products with high saturated vapor pressure storage;
· By design: steel reservoirs (vertical cylindrical with conic and spherical top, horizontal cylindrical with flat and spatial bottom, drop-shaped, globular), ferroconcrete reservoirs (vertical and horizontal cylindrical, square and trench). depot petroleum fuel equipment diesel fuel storage, which is consumed at the rate of 110 m 3 per day I ve chosen steel vertical cylinder reservoirs. As there happen quite sharp weather fluctuations, the reservoirs top will be floating to minimize fuel evaporation.
Reservoir with floating top
The body of a reservoir with floating top (fig.) represents an ordinary cylindrical casing. Nowadays the most popular are floating tops with a central disk on which circumference is placed an annular pontoon, divided with radial partitions by hermetic sections, which prevent the top from leaking.
.8 Scheme of a reservoir with a floating top: 1 - swing pipe for storm water escape from the floating top; 2 - manifold for fuel intake; 3 - manifold for fuel supply; 4 - reservoir body; 5 - floating top; 6 - gate, tightening the gap between the floating top and body; 7 - stairs for top inspection; 8 - stairway.
1. Main characteristics of the reservoir
IndexReservoir 2000 m 3 Nominal volume, m 3 2000Internal wall diameter, m12,33Wall height, m9,0Reservoir height, m12Reservoir diameter, m19Mass with equipment, kg87906
Equipment of the reservoir with floating top
.9 Scheme of equipment placing on a vertical steel reservoir
- toplight; 2 - vent manifold; 3 - fire safety device; 4 - main breather; 5 - dip hatch; 6 - level meter; 7 - access door; 8 - water discharge; 9 - tank-cap valve; 10 - cargo manifold; 11 - bypass device; 12 - tank-cap valve lifter; 13 - hydraulic safety breather.
The distinctive point of reservoirs with floating top is that the toplight, level meter and breathers are mounted directly on the floating roof. The need to install vent manifolds arises from the fact that at reservoir emptying below supporting poles there is a gas space forming underneath the floating roof. At further reservoir filling this gas cushion raquo ;, being forced out through the gap between the top and body, may create warp of the floating roof and cause its self-locking. To avoid this, the gas phase release from under the floating roof is made in an organized way - through the breathers.
Toplight
The toplight LS - 500 is intended for oil reservoir internal inspection and airing before repair. T...
