JPS5855312Y2 - Local heating system for high viscosity fluid tanks - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a system for locally heating a highly viscous fluid, such as heavy oil, when the fluid is withdrawn from a storage tank.

Heavy oil C, which is a liquid fuel, has a high viscosity when the temperature is low, so it is difficult to pump the oil. Therefore, when extracting the heavy oil, it is necessary to heat the heavy oil in the tank.

Therefore, it has been common practice in the past for large-capacity outdoor storage tanks to heat the oil in the tank by installing a steam coil inside the tank, and for small-capacity service tanks to heat the oil inside the tank. In this case, indirect heating using hot water or a shield type heater is also used.

Heating the entire oil in a large-capacity outdoor storage tank is not only an economic loss of energy, but also increases the concentration of flammable gas in the tank space, making it a safety consideration to prevent ignition and explosion of flammable gas. There were disadvantages such as an increase in

There were safety issues, especially when installing a heater inside the tank.

The purpose of this invention is to provide a high viscosity fluid local heating system that can be used for extracting heavy oil from a heavy oil tank as a heavy oil combustion auxiliary device that is excellent in terms of both economy and safety.

That is, in the present invention, a heater is provided outside a tank storing a high viscosity fluid, a cylindrical member with one end open and the other end closed is provided inside the tank, and the high viscosity fluid is supplied from within the cylindrical member to a first source. The heated fluid is led to a heater outside the tank by a lead-out pipe, and the heated fluid is returned to the cylindrical member inside the tank, and the fluid inside the cylindrical member is locally heated. The present invention provides a local heating system configured to send heat to a desired location through a lead-out pipe.

A specific example of the heating system according to the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a heater 2 is provided outside a heavy oil tank 1 installed outdoors.

The heater 2 is preferably an electric heater, but may be any type of heater using any heat source such as steam or solar heat.

A suction tube 3, which is a partitioning member, as shown in FIGS. 2 and 3 is provided inside the tank 1.

The suction cylinder 3 has a structure in which one end is open and the other end is closed, and first and second lead-out pipes 4 and 5 extend from the suction cylinder 3 to the outside of the tank.

The first outlet pipe 4 is connected to the heater 2 via a pump 6.
It returns to the inside of the suction cylinder 3 in the tank 1 as a reflux pipe 7.

The second outlet pipe 5 is connected via a pump 8 to a desired combustion equipment or a terminal service tank (not shown).

Note that the reflux pipe 7 is connected via a valve 11 to a pipe 10 provided for heating the fluid near the opening of the suction cylinder 3.

The pipe 10 is provided with a plurality of openings near the opening of the suction cylinder 3 toward the back of the suction cylinder 3.

In a heating system with such a configuration, first the pump 6
The heavy oil in the suction cylinder 3 is sent to the heater 2 through the outlet pipe 4.

Heavy oil heated to, for example, 40° C. by the heater 2 is refluxed into the suction cylinder 3 through the reflux pipe 7.

As a result, the heavy oil in the suction cylinder 3 is locally heated and its temperature increases compared to other parts of the tank.

The heated heavy oil is drawn out of the tank through the second outlet pipe 5 by the pump 8 and sent to a desired department.

When the outside temperature is low, such as in winter, it is preferable to open the valve 11 and send heated heavy oil through the pipe 10 near the opening of the suction tube 3 to preheat the heavy oil in this area.

It is preferable that the heater 2 is configured to be able to vary the amount of heat so that the degree of heating can be changed depending on the amount of oil sent out.

As described above, the heating system according to the present invention locally heats the heavy oil in the storage tank to prevent unnecessary heat dissipation.

In addition, since the heating circulation structure is for only the sampled portion, the temperature rises quickly and is very efficient.

Furthermore, unlike conventional heaters, there is no heating part inside the tank, making it safe and easy to inspect and repair, which is advantageous in terms of maintenance.

[Brief explanation of the drawing]

FIG. 1 is an equipment layout diagram of the local heating system. FIG. 2 shows the attachment of the suction tube to the storage tank. FIG. 3 is a sectional view taken along the line A--A in FIG. 2 showing details of the suction tube.

Claims (2)

[Scope of utility model registration request] (1) A local heating system for a tank storing a highly viscous fluid, which includes a heating means installed outside the tank, a partitioning member having an opening installed inside the tank, and a pump pumped from inside the partitioning member. a first delivery pipe communicating with the heating means via a reflux pipe for returning fluid from the heating means back into the compartment member; A local heating system, characterized in that it is provided with a second delivery pipe for sending. (2) The heating system according to claim 1, wherein the reflux pipe includes a branch pipe that returns the heated fluid to the vicinity of the opening of the partition member.