JP2002029590A - Asphalt storage tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an asphalt storage tank wherein the odor can be prevented from diffusing by reducing the temperature of a vaporized gas which is discharged from the tank main body. SOLUTION: This asphalt storage tank is equipped with the tank main body 1 having a built-in heater 1a, which keeps asphalt at a high temperature and stores the asphalt. In such an asphalt storage tank, a gas-discharging cylinder 2 is provided at the upper end of the tank main body 1 to discharge the vaporized gas generated from the asphalt. Then, the gas-discharging cylinder 2 is equipped with a cooling means which can cool the vaporized gas to a degree wherein the vaporized gas is condensed. Thus, the odor concentration of the vaporized gas is reduced by the condensation, and the diffusion of the odor is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt storage tank, and more particularly to an asphalt storage tank capable of deodorizing and releasing a vaporized gas from asphalt.

[0002]

2. Description of the Related Art In an asphalt manufacturing facility, asphalt mixes are manufactured which reuse waste materials in addition to manufacturing from new aggregates. Asphalt is stored in a dedicated storage tank for storage at a high temperature.

FIG. 7 is a schematic diagram of a conventional asphalt storage tank. A heater 52 for heating is built in a tank body 51, and the stored asphalt A is stored at 100 ° C. to 200 ° C.
It is constantly heated to a high temperature of ℃ to maintain the molten state. When the asphalt A is stored at a high temperature in this way, since the asphalt A generates a vaporized gas, the internal pressure of the tank body 51 increases. Therefore, in order to discharge the generated vaporized gas, a gas vent pipe 53 is provided at the upper end of the tank body 51.
Is usually provided. Such degassing pipe 53
Is provided, the vaporized gas is released to the outside, and the pressure increase in the tank body 51 can be suppressed.

[0004]

However, since the vaporized gas generated from the asphalt A contains a strong odor, if it is discharged from the degassing pipe 53 as it is, environmental pollution is caused. That is, in the related art, since the vaporized gas from the asphalt A is released as it is from the degassing pipe 53, there is a problem that the diffusion of the odor cannot be avoided.

Accordingly, an object of the present invention is to provide an asphalt storage tank capable of preventing the diffusion of odor by lowering the temperature of vaporized gas discharged from the tank body.

[0006]

According to the present invention, there is provided an asphalt storage tank having a tank body for storing asphalt while maintaining asphalt at a high temperature. The asphalt storage tank is provided at an upper end of the tank body and discharges vaporized gas generated from the asphalt. The cylinder is provided with cooling means capable of cooling the vaporized gas to such an extent that the vaporized gas is condensed.

According to the present invention, since the vaporized gas passing through the exhaust stack is cooled by the cooling means and condensed, the odor concentration of the vaporized gas released from the exhaust stack can be reduced, and the odor is diffused into the environment. Can be suppressed.

In the present invention, the cooling means may be radiating fins provided on an outer periphery of an exhaust pipe branched from a main pipe of the exhaust pipe.

In this configuration, since the vaporized gas passes through a plurality of exhaust pipes branched from the main pipe, the heat transfer area is increased to promote the cooling of the vaporized gas, and heat is diffused to the outside air by the radiation fins provided on the exhaust pipe. Therefore, the vaporized gas is quickly cooled.

[0010] The cooling means may be a blower for blowing air to a surface of an exhaust pipe branched from a main pipe of the exhaust pipe.

[0011] In this configuration, since air from the blower is blown to the plurality of exhaust pipes, heat removal from the exhaust pipes is promoted, and the vaporized gas is rapidly cooled to reduce its odor concentration.

In the above configuration, the blower is disposed below the exhaust pipe, and radiation fins arranged in a circumferential direction are provided on an outer periphery of the exhaust pipe, and air from the blower is supplied between the radiation fins. May be passed.

In this configuration, since the air from the blower passes between the radiation fins, the radiation from the radiation fins is further promoted, and the vaporized gas is cooled more quickly.

Further, the cooling means may be a water cooling jacket formed around a plurality of exhaust pipes branched from a main pipe of the exhaust pipe and through which cooling water is circulated and supplied.

[0015] In this configuration, the vaporized gas can be cooled more efficiently by the cooling water circulated and supplied to the water-cooling jacket than in the case of the air-cooling type, and the odor concentration can be further reduced and released.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of an asphalt storage tank according to an embodiment of the present invention, FIG. 2 (a) is a front view of a main part, and FIG. 2 (b) is a plan view of the main part of FIG. is there.

In the figure, asphalt A is stored in a tank body 1 for storing asphalt A in the same manner as in the prior art.
A heater 1a for heating and maintaining the temperature up to about 200C to 200C is incorporated. The roof at the upper end of the tank body 1 is formed in a conical shape, and the exhaust pipe 2 is connected to the highest part thereof. The exhaust pipe 2 includes a main pipe 2a connected to the upper end of the tank body 1, four exhaust pipes 2b branched from the upper end of the main pipe 2a, and a cover 2c arranged above the exhaust pipes 2b. It is a thing. A large number of annular heat radiation fins 3 are integrated around the exhaust pipe 2b.

In the above configuration, asphalt A heated and stored in a high temperature state in the tank body 1 generates a vaporized gas of about 80 ° C. It is known that the main component of the vaporized gas from the asphalt A is hydrocarbons, and condenses when the temperature drops to 60 ° C.

The vaporized gas is discharged from the main pipe 2a of the exhaust pipe 2 to the outside through four exhaust pipes 2b. However, since the exhaust pipe 2b is provided with the radiation fins 3, the vaporized gas passing through the exhaust pipe 2b is radiated. The fin 3 is cooled by the heat transfer to the outside. Therefore, a part of the vaporized gas can be condensed in the exhaust pipe 2b while passing through the exhaust pipe 2, and the exhaust pipe 2b
The odor concentration contained in the vaporized gas released from the furnace decreases.
As a result, diffusion of the odor of the gas released from the exhaust pipe 2 can be suppressed, and environmental degradation can be prevented.

FIG. 3 shows another cooling structure of the exhaust stack.
(A) is a front view, (b) is a plan view of a main part. In addition,
In the following examples, the same components as those shown in FIGS. 1 and 2 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the example of FIG. 3, a vertically arranged radiating fins 4 are provided on the exhaust pipe 2b of the exhaust pipe 2. As in the examples of FIGS. The temperature is reduced to condense a part of it. Therefore, the odor concentration of the vaporized gas released can be reduced, and the diffusion of the odor can be suppressed.

FIG. 4 shows an example in which a configuration in which a blower is provided in addition to the configuration having the heat radiation fins 4 in FIG. 3 to more effectively lower the temperature of the vaporized gas passing through the exhaust pipe 2.

As shown, a blower 5 is arranged around the main pipe 2a and substantially coaxially with each exhaust pipe 2b. The blower 5 blows air upward so as to form an air flow that flows upward from below between the vertically arranged radiating fins 4 of the exhaust pipes 2b. Such airflow from the blower 5 promotes heat transfer from the radiating fins 4, and can effectively cool the vaporized gas passing through the exhaust pipe 2b. Therefore, the degree of condensation of the vaporized gas is increased, the odor concentration is significantly reduced, and the diffusion of the odor is prevented.

FIG. 5 is a schematic view showing an example in which the exhaust pipe 2 is water-cooled. FIG. 6A is a longitudinal sectional view of a main part, and FIG. 6B is a plan view of the main part. .

A water-cooled jacket 6 is externally provided around the exhaust pipe 2b of the exhaust pipe 2 in a double tubular shape. The water-cooled jacket 6 has an inlet port 6a at the lower end and an outlet port 6b at the upper end, as shown in FIG.
On the other hand, a cooling water tank 7 and a pump 8 for pumping cooling water from the cooling water tank 7 are arranged near the tank body 1. The pump 8 is connected to the inlet port 6a of the water cooling jacket 6, and the outlet port 6b is connected to the cooling water tank 7 by an annular flow path.

In this configuration, the operation of the pump 8 causes the cooling water in the cooling water tank 7 to circulate in the water cooling jacket 6 to water-cool the exhaust pipe 2b. In such water cooling, the degree of cooling can be increased as compared with the above-mentioned air cooling method using the radiation fins 3 and 4, and the asphalt A vaporized gas is discharged into the exhaust pipe 1b.
It can be effectively condensed within. Therefore, the odor concentration of the released vaporized gas can be significantly reduced, and the diffusion of the odor can be prevented.

[0027]

According to the present invention, the exhaust stack through which the asphalt vaporized gas passes is cooled to condense a part of the vaporized gas,
Since the odor concentration can be reduced and the vaporized gas can be released from the tank main body, the diffusion of the odor is suppressed and the operation without causing the environmental degradation can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic view of an asphalt storage tank provided with the deodorizing device of the present invention.

FIG. 2 is a main part of the deodorizing device in the example of FIG.
(A) is a schematic front sectional view of a main part, and (b) is a plan view of the main part.

3A and 3B are examples in which vertical radiating fins are provided around an exhaust pipe, wherein FIG. 3A is a front view of a main part, and FIG. 3B is a plan view of the main part.

4 is an example in which a blower below an exhaust pipe is provided in the example of FIG. 3, (a) is a schematic front view, and (b) is a plan view of a main part.

FIG. 5 is a schematic diagram showing an asphalt storage tank provided with a water-cooled deodorizing device together with a water-cooled cooling system.

6 is a main part of the deodorizing device in the example of FIG. 5,
(A) is a front sectional view of a main part, and (b) is a plan view of the main part.

FIG. 7 is a schematic view of a conventional asphalt storage tank.

[Description of Signs] 1 Tank body 1a Heater 2 Exhaust tube 2a Main pipe 2b Exhaust pipe 2c Cover 3,4 Radiation fin 5 Blower 6 Water cooling jacket 6a Inlet port 6b Outlet port 7 Cooling water tank 8 Pump

Claims (5)

[Claims] 1. An asphalt storage tank comprising a tank body for storing asphalt while maintaining it at a high temperature,
An asphalt storage tank, comprising: an exhaust pipe provided at an upper end of the tank body for discharging a vaporized gas generated from the asphalt, a cooling unit capable of cooling the vaporized gas to an extent that the vaporized gas is condensed. 2. The asphalt storage tank according to claim 1, wherein said cooling means is a radiation fin provided on an outer periphery of a plurality of exhaust pipes branched from a main pipe of said exhaust pipe. 3. The asphalt storage tank according to claim 1, wherein said cooling means is a blower for blowing air to a surface of an exhaust pipe branched from a main pipe of said exhaust pipe. 4. A structure in which the blower is disposed below the exhaust pipe, and heat radiation fins arranged in a circumferential direction are provided on an outer periphery of the exhaust pipe, and air from the blower passes between the heat radiation fins. 4. The asphalt storage tank according to claim 3, wherein: 5. The cooling means according to claim 1, wherein said cooling means is a water cooling jacket formed around a plurality of exhaust pipes branched from a main pipe of said exhaust pipe and through which cooling water is circulated and supplied.
An asphalt storage tank as described.