JP2002249197A - Heat retaining structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat retaining structure which makes a heat retaining panel mounted on a heavy oil tank in such a manner that the heat retaining panel is floated over the heavy oil tank and which can bring about high heat retaining properties. SOLUTION: In this structure, the heat retaining panel B is mounted on a surface of a roof part 2 of the tank in such a manner as to be floated from the surface of the roof part 2 at an interval of 5-10 mm by a magnet 5 having a spacer 4. A gap 6 of a joint part of the panel B makes rainwater intrude into a drainage channel formed by a gap 7 made by floating the panel B with respect to the roof part 2, and serves to evaporate the rainwater stored in the roof part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat retaining structure in which a heat retaining panel is attached to a heat retaining body, and in particular, a tank for storing a highly viscous liquid such as a heavy oil tank and having a mechanism for heating the liquid. The present invention relates to an improvement in a structure in which a heat insulating panel is attached to the surface of a heat insulating outer wall.

[0002]

2. Description of the Related Art In a heavy oil tank, a heater for heating the heavy oil is disposed inside the tank because the viscosity of the heavy oil stored inside the tank at a low temperature increases and it becomes difficult to transfer the heavy oil outside the tank. . However, the heavy oil tank is basically exposed outdoors, and the heat for heating the heavy oil is dissipated from the outer wall surface of the tank, and the heating effect is impaired. In order to avoid this problem, the surface of the outer wall of the tank generally has a heat retaining structure with a heat retaining panel attached thereto.

The present applicant has disclosed a heat insulation structure for keeping the heavy oil tank warm by a heat insulation panel in a simple manner.
19293.

The above heat insulation structure is a structure in which a heat insulation panel with a magnet is attached to the outer surface of the tank at a distance from the surface. In the thermal insulation structure, a drainage channel is formed between the tank outer wall surface and the thermal insulation panel by floating the thermal insulation panel at an interval from the tank outer wall surface, and drains rainwater from this drainage channel to prevent tank corrosion. Like that.

[0005]

In the case of a large heavy oil tank, the cost for heating the stored heavy oil is considerably large, and there is a demand for saving even a little energy. A main object of the present invention is to provide a heat insulation structure in which a heat insulation panel is mounted to be spaced apart from the outer wall surface of a heavy oil tank at a certain interval so as to obtain higher heat insulation.

[0006]

Means for Solving the Problems The inventors of the present invention arranged heat insulating panels at intervals on the surface of a heat-insulated body, and measured the difference in the heat insulating effect by changing the interval to increase the heat insulating effect. The present inventors have found that there is an appropriate range of the interval, and have completed the present invention based on the finding.

In other words, the present invention has a gist that, in a heat insulation structure in which a heat insulation panel is attached to a heat insulation body, the heat insulation panel is mounted so as to float from the surface of the heat insulation body at an interval of 5 to 10 mm.

The present invention is particularly effective when applied to a heat-insulating structure in which a heat-insulating panel is mounted on a tank outer wall surface having a mechanism for keeping and heating a stored object.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in FIGS. 1 to 3, A is a floating roof type heavy oil tank, 1 is a tank side wall, 2 is a roof, and 3 is a pontoon (floating). The heat insulation panel B attached to the side wall portion 1 and the roof portion 2 of the tank A is made of a calcium carbonate-based closed cell. ing.

The heat insulation panel B is provided on the side wall portion 1 and the roof portion 2 of the tank by the thickness of the magnet including the spacer.
It is mounted in a state of floating at a distance from its surface. The interval at which the heat insulation panel is mounted so as to float from the outer surface of the tank is 5 to 10 mm.

The heat insulation panels B attached to the side wall portion 1 are arranged so as to abut each other. However, a vertical gap formed by the thickness of the spacer and the magnet exists as a drainage channel, and inevitably enters. The resulting rainwater flows through the vertical gap and is discharged outside the tank.

In the roof 2, the heat insulating panel B is attached so that a gap 6 exists at the joint. In this roof, the rainwater enters the drainage channel consisting of the gap 7 between the heat insulating panel B and the surface of the roof from the gap 6, flows along the sloped roof, and is discharged outside the tank. You. Even if rainwater accumulates on the roof with subtle irregularities and joints, the rainwater evaporates due to the heat of the heated heavy oil in the tank and is discharged from the gap 6.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an experimental method and an experimental result in which a preferable distance between the outer surface of the tank and the heat insulating panel attached thereto will be described. FIG. 4 shows an experimental apparatus. In this experimental apparatus, a glass wool molded plate 9 having a thickness of 50 mm is provided at an opening of a container 8 formed of a polystyrene foam into a bath-type container shape. The container opening is 9
It has a size of 00 × 1000 mm.

At the time of the experiment, the test insulation panel B was placed on the glass wool molding plate 9 with the legs 10 at predetermined intervals.
Is placed. A heater 11 and a fan 12 are provided inside the container.
And the temperature in the container is measured by the temperature sensor 13.

In the experiment, the heater 11 was placed inside the container 8.
Is generated, and the fan 12 is rotated to force convection of the air heated by the heater 11 inside the container 8. First, the amount of heat generated from the heater 11 is adjusted so that the internal temperature of the container 8 becomes constant. This takes some time.

Since the amount of heat radiation from the styrofoam container 8 is measured in advance, it is subtracted from the amount of heat generated by the heater 11 in a state where the temperature inside the container is constant, so that the amount of heat dissipated through the heat insulation panel is obtained. Is calculated. The amount of heat dissipated from the heat retaining panel is obtained by changing the height of the legs 10 and calculating the amount of heat dissipated each time. The data thus obtained is shown in the graph of FIG.

As shown in the graph of FIG. 5, by changing the interval between the glass wool molded plate 9 and the heat retaining panel B,
It can be seen that the amount of heat dissipated from the heat retaining panel changes. This functions as an air layer in the space between the legs 10,
It is considered that this is due to the fact that the heat insulating property is increased at an appropriate place.

When the distance between the legs is increased to a certain extent or more, the amount of heat dissipated (that is, the heat insulating property is reduced) is increased because the effect of convection increases as the distance increases. Conceivable.

As is clear from the graph of FIG. 5, it is suggested that a good heat retaining property can be obtained when the floating dimension (leg height) of the heat retaining panel is about 5 mm. But,
On the other hand, when the floating dimension of the heat insulation panel becomes 5 mm or less,
It has been found that the drainage of the drainage channel described above becomes worse. This is undesirable because it causes corrosion of the roof in a heavy oil tank placed outdoors. Therefore, as a suitable dimension for floating the thermal insulation panel at an interval from the outer wall surface of the tank, 5 to 10 m
m is selected.

[0020]

As described in detail above, according to the present invention,
In a structure in which the heat insulation panel is floated and attached to the heavy oil tank, higher heat insulation can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a structure in which a heat retaining panel is attached to a heavy oil tank.

FIG. 2 is a perspective view of a heat insulating panel.

FIG. 3 is a cross-sectional view of a structure in which a heat retaining panel is attached to a roof of a heavy oil tank.

FIG. 4 is a configuration diagram of an experimental device for calculating the amount of heat dissipated.

FIG. 5 is a graph showing the amount of heat dissipated from a heat retaining panel.

[Explanation of symbols]

 A Fuel oil tank 1 Side wall of tank 2 Roof of tank 3 Pontoon 4 Spacer 5 Magnet 6 Gap between joints of heat insulation panel 7 Floating gap of heat insulation panel with respect to roof

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yoshihiro Yokoi 7-floor, Rokugyokai Sogo Building, 2-32-3 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Nichias Corporation A / E Business Headquarters (72) Inventor Ryo Nishimura Tokyo 7-floor, Nichias Engineering Service Co., Ltd., 7th floor, Rokugyokai Sogo Building, 2-32 Kita-Shinagawa, Shinagawa-ku, Tokyo (72) Inventor Kensuke Hoshi 1-1-26 Shiba-Daimon, Minato-ku, Tokyo F-term within Nichias Corporation (reference) 3E070 AA03 AA06 AB03 EA09 EB05 NA01 NA05 NA07 VA30 3H036 AA09 AD02

Claims (2)

[Claims] 1. A heat retaining structure comprising a heat retaining body and a heat retaining panel attached to the heat retaining body.
A heat retaining structure characterized by being mounted at a distance of 10 mm while being floated. 2. A tank having a mechanism in which the heat-retaining body heats and heats a storage object, wherein a heat-retaining panel is formed on the outer wall surface of the tank by a magnet from the surface of the outer wall of the tank by a magnet.
The heat retaining structure according to claim 1, wherein the heat retaining structure is attached by being floated at an interval of 10 mm.