JPH0114109B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tank for storing coal and heavy oil slurry, which are high viscosity liquids, in a heat-retaining state.

Due to the recent tightening of oil supplies, attention has been focused on using coal and heavy oil slurry (hereinafter referred to as COM) as a fuel, which is a mixture of finely powdered coal and heavy oil.
COM fuel is a mixture of 80% pulverized coal of 200Mesh or less and 10 to 15% by weight uniformly mixed in heavy oil.
Additives of 0.1-0.15% may be added.

The advantages of COM fuel include that it can be handled as a liquid even though it is mixed with coal, and that it is relatively easy to burn, lift, etc. On the other hand, the drawback is room temperature (about 30℃)
One example is that it has a tendency to solidify. And this large tank for COM fuel had never been put into practical use.

This invention was developed in view of the above circumstances,
An object of the present invention is to provide a storage tank that can safely store a large amount of high viscosity liquid COM fuel without causing solidification and with reduced energy consumption.

The present invention will be described below with reference to the accompanying drawings.

This tank 1 is a double-shell tank, and mainly consists of an inner tank 2 forming an inner shell and an outer tank 3 forming an outer shell.

The inner tank 2 consists of a bottom part 4, a side wall part 5 and a roof part 6, and contains a high viscosity liquid COM fuel 7.
to store. Liquids such as COM fuel tend to solidify at low temperatures, so heating devices such as heaters (not shown) can be used to reduce the temperature at which they will not solidify, e.g.
It is heated up to 70℃. Therefore, the side wall portion 5 and roof portion 6 of the inner tank 2 have a heat insulating structure in which a heat insulating material 10 is inserted between the inner iron plate 8 and the outer iron plate 9 to prevent heat dissipation of the fuel.

The outer tank 3 has a side wall part 11 of a steel-framed concrete structure, a bottom foundation 12, and a roof part 1 of a steel-framed structure.
It consists of 3. The side wall portion 11 is a structure integrated with the bottom foundation 12, and can sufficiently withstand external forces such as earthquakes. Therefore, the side wall portion 11
also serves as a dike to prevent the COM fuel 7 stored inside from flowing out even if the inner tank 2 is damaged.

The inner tank 2 and the outer tank 3 are separated by their side walls 5, 11 and roofs 6, 13 to form a space, and a horizontal partition wall 14 is provided below the roofs 6, 13. The space between the outer tank 3 and the inner tank 2 is divided into an upper heat exchange space 15 between the roofs of both tanks and a lower heat storage space 16 between the side walls. The joint between the bulkhead 14 and both roof parts 6 and 13 is an expansion joint, and has a structure in which no force is applied to each other even if the inner tank 2 and outer tank 3 move due to an earthquake or the like. It is becoming. Also, this bulkhead 1
4 is filled with a heat insulating material to prevent the temperature of the heat storage space from escaping into the heat exchange space.

The air in the heat exchange space 15 surrounded by the inner tank roof part 6, the outer tank roof part 13, and the partition wall 14 is heated by the roof part 1 due to sunlight irradiation.
It becomes high temperature due to heat exchange with 3. Heat exchange space 15
The temperature Tc of the air is detected by a thermometer T2 provided in the heat exchange space 15, and a signal representing the temperature is
It is input to the control device 17. On the other hand, the heat storage space 16
A thermometer T3 is also provided in the heat storage space 16.
temperature Ts is detected, and a temperature signal is input to the control device 17.

The control device 17 opens the automatic valve 16 and valve 20 of the fan 18 when the temperature Tc of the heat exchange space 15 and the temperature Ts of the heat storage space 16 become higher.
Automatically drive Juan 18. For this reason, the air in the heat exchange space 15 is forced downward into the heat storage space 16 through the piping 21 . On the other hand, the air in the heat storage space 16 is discharged to the heat exchange space 15 through the piping 22.

Conversely, the temperature Tc of the heat exchange space 15 is the temperature Tc of the heat storage space 16.
If the temperature becomes lower than Ts, valves 19 and 2
Since both are closed, air exchange between the heat exchange space 15 and the heat storage space 16 is not performed.

The present invention has the above-mentioned structure, and a space is formed by separating the inner tank 2 and outer tank 3 for storing high viscosity liquid by the side walls 5, 11 and the roof parts 6, 11, and the insulation of the lower part of the roof part. The space is divided by a partition wall 14 into an upper heat exchange space 15 and a lower heat storage space 16, and atmospheric heat can be utilized by the heat exchange space.

Further, as the air in each space is circulated as described above, the heat exchange space 15 also has a heat storage function and a heat insulation function at night. Therefore, inside tank 2
Since the COM fuel 7 is surrounded by the heat storage space 16 and the heat exchange space 15, there is less heat loss.
Furthermore, since the side wall 11 of the outer tank 3 also serves as an oil barrier, land can be used effectively and it is economical.

[Brief explanation of drawings]

The accompanying drawing is a schematic front sectional view of a storage tank according to the invention. 1...High viscosity liquid storage tank, 2...Inner tank,
3...Outer tank, 4...Bottom, 5...Side wall, 6...Roof, 7...COM fuel, 8...Internal steel plate, 9...External steel plate, 10...Insulation material, 11...Side wall, 12...Bottom foundation, 13 ...Roof part, 14...Partition wall, 15...Heat exchange space, 16...Heat storage space, 17...Control device, 18...
Fan, 19, 20...Valve, 21, 22...Piping, T1, T2, T3...Thermometer.

Claims (1)

[Claims] 1 The inner tank consists of a bottom, a side wall with an insulated structure, and a roof, and the outer tank consists of a bottom and side walls with a reinforced concrete structure, and a roof with a steel structure. The space is constructed as a separate state between the roof and the roof.
and the space is divided into an upper heat exchange space and a lower heat storage space by a heat insulating partition wall at the lower part of the roof, and the heat exchange space and the heat storage space are connected by ventilation piping. Liquid storage tank.