Pirobloc provides efficient, safe and custom solutions to heat storage tanks on ports. It is frequently used to keep different fuels and raw materials in liquid state, such as:
Heating storage tanks in port terminals is one of the main applications of thermal fluid boilers.
Some hydrocarbons, asphalts, bitumen and heavy fuel oil require a certain temperature to be handled properly. As these fluids are solid or semi-solid at room temperature, it is imperative to use a heating system during transportation and also inside the storage tanks.
These types of port facilities need a thermal oil system whose reliability is absolutely guaranteed, as a situation with a large quantity of product solidifying inside the tanks must be prevented at all times.
Heating by thermal oil is the safest, most efficient and reliable method in this type of facility and offers numerous advantages over the other available technology, which is steam heating.
The heating system usually adopted inside the tank is a grill or coil through which oil circulates inside. This is the simplest system. This coil may sometimes be arranged at different heights to achieve better heating uniformity at different heights.
The size of these coils must be chosen properly to transfer all the power of the thermal oil boiler into the tank. Thus, the corresponding engineering calculations must be made to determine a sufficient heating surface area and diameter and length for the pipes. This geometry will have its own load loss or Delta P, which is crucial for the proper dimensioning of thermal oil pumps and the whole hydraulic circuit.
The mass to be heated and the temperature increase required over the period of time must be known for proper dimensioning of the heating coils and for the boiler power. The basic calculation is as follows. In fact, there are other parameters that also influence the calculation of the required heating power. Among others, the most important are:
- Tank geometry, length and diameter
- Room temperature
- Tank insulation type
- Specific heat of the product contained in the tanks
- Given the importance of heating in this type of application, and that it is absolutely essential to prevent a large mass of product from solidifying inside the tank, there are usually 2 sets of boilers and 3 pumps in each facility. Thus, there is always 1 spare boiler and 2 spare pumps.
Sometimes a heater or suction heater is available in addition to the heating coil inside the tank to reduce the viscosity in the suction zone. It is an open mouth exchanger where the thermal oil tube bundle is in direct contact with the fluid to be transported.
Pirobloc has extensive experience of the design, installation, commissioning and maintenance of thermal oil systems for heating storage tanks in port facilities.
The system can be designed for either simultaneous or alternate operation of both boilers. Any of the 3 pumps can work with either boiler using a manual valve system according to the scheme shown below: