JPH09165588A - White smoke-preventing device of liquid gas evaporator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a white smoke-preventing device of a liquid gas evaporator capable of eliminating the white smoke generated around the liquid gas evaporator and preventing white smoke from occurring in operating the reactor. SOLUTION: This white smoke-preventing device 1 consists of an air supply duct 2, a heat exchanger 3 installed in the middle part of the duct 2 and a fan 4 which sucks air from a suction opening 21 and blows out heated air heated by the heat exchanger 3 from an air outlet 22. The white smoke can be eliminated by feeding the heated air blown out from the outlet 22 to the lower part of a liquid gas evaporator 10. The white gas can be prevented from occurring by continuously using the white smoke preventing device 1 during operating the liquid gas evaporator 10, thus a heat exchange efficiency of the liquid gas evaporator 10 is enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a white smoke prevention device for a liquefied gas evaporator used to eliminate white smoke generated around the liquefied gas evaporator.

[0002]

2. Description of the Related Art As a liquefied gas evaporator, a liquefied gas such as LPG or liquid oxygen is vaporized to normal temperature by performing heat exchange between a low temperature liquefied gas passing through the inside of the evaporator and outside air. So-called air temperature liquefied gas evaporators are generally used, but depending on the weather conditions, etc., in the outside air around the liquefied gas evaporator, especially around the evaporator pipe on the inlet side where the surface temperature becomes the lowest. White smoke may be generated by cooling the water vapor contained in. It is considered that it is not preferable to discharge the white smoke into the atmosphere as it is, because the white smoke may be an obstacle to various traffics.

Therefore, conventionally, as a device for eliminating such white smoke, a device including an exhaust duct, a heat exchanger and a blower has been devised and put to practical use. In this device, the white smoke sucked into the exhaust duct is erased by being heated by the heat exchanger and then blown into the atmosphere as ordinary air by a blower or the like.

[0004]

However, the above-mentioned conventional device has the following problems. That is,
Since the white smoke sucked into the duct has a low temperature of about -50 ° C, ice may adhere to the inner surface of the duct to block the passage, and the exhaust function may not be sufficiently exhibited. Moreover, since solid matter such as pebbles and dust may be sucked into the duct along with white smoke, the blower and the heat exchanger may be broken or damaged by these solid matter. Further, in the case of the conventional device, the generated white smoke can be erased, but the generation of white smoke cannot be prevented in advance.

The present invention has been made in view of the above points, and it is possible to reliably eliminate the white smoke generated around the liquefied gas evaporator during its operation and to prevent the white smoke from occurring. It is an object of the present invention to provide a white smoke prevention device for a liquefied gas evaporator that can prevent such smoke.

[0006]

In order to achieve the above object, a device for preventing white smoke of a liquefied gas evaporator according to the present invention comprises an air supply duct and an air heater provided at an intermediate portion of the duct. , A blower that sucks air from the suction port of the duct and blows the air heated by the air heater from the blowing port. It is what

According to the above white smoke prevention device, the white smoke generated at the time of operation of the liquefied gas evaporator and accumulated below the evaporator can be reliably erased by the heated air blown from the outlet of the duct. . Further, if the white smoke prevention device is continuously used during the operation of the liquefied gas evaporator, the temperature of the surrounding air of the liquefied gas evaporator rises due to the heated air, so that the generation of white smoke can be prevented. In addition, the heat exchange efficiency of the liquefied gas evaporator itself can be improved.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to FIG.

In FIG. 1, a liquefied gas evaporator (10) has a plurality of parallel vertical evaporation pipes (11) having radial fins (11a) on the outer circumference and having one ends connected to each other by a U-shaped connecting pipe (12). ) Is provided.

Adjacent to the outlet side evaporation pipe (11) of the liquefied gas evaporator (10), there are provided a supply air duct (2), an air heating heat exchanger (3) and a fan (4). A white smoke suppressor (1) is installed.

The air supply duct (2) is an L-shaped one having a vertical portion (2A) and a horizontal portion (2B). Duct vertical part (2A)
A suction port (21) is provided at the upper end of the. On the other hand, at the tip of the horizontal duct (2B), there is provided a blowout port (22) that opens downwardly of the liquefied gas evaporator (10). A gable-shaped roof (23) is arranged above the suction port (21) of the duct vertical portion (2A) with a slight space above and below. A silencer (5) is arranged near the upper end of the vertical duct (2A). The duct may be branched to provide a plurality of inlets and outlets.

The heat exchanger (3) for heating air is composed of a large number of heat transfer tubes (3a) which are arranged in parallel in the horizontal direction and through which hot water is circulated, and the lower end of the duct vertical portion (2A). It is arranged in the side part. One end of each heat transfer pipe (3a) is connected to a hot water inlet pipe (not shown), and the other end is connected to a hot water outlet pipe (not shown). The air flowing in the duct (2) is a heat exchanger.
When passing between the heat transfer tubes (3a) of (3), the heat transfer tubes (3a)
It is heated by the heat of the warm water inside. Instead of the heat exchanger (3), it is of course possible to use a heat pipe type heat exchanger, an electric heater or the like.

The fan (4) is arranged in the duct vertical portion (2A) between the silencer (5) and the heat exchanger (3). This fan (4) draws in air from the inlet (21) of the duct (2) and also heat exchanger (3).
The air heated by is blown out from the outlet (22).

Liquefied gas evaporator (10) and white smoke prevention device
A concrete enclosure (6) is erected around (1). This enclosure (6) is for preventing the diffusion of white smoke generated around the liquefied gas evaporator (10). Therefore, the enclosure (6) need not be so high and is typically about 150 cm. Of course, only the liquefied gas evaporator (10) may be enclosed by the enclosure (6).

Next, a method of using the white smoke prevention device (1) of the liquefied gas evaporator having the above structure will be described. During operation of the liquefied gas evaporator (10), especially when white smoke is generated around the inlet side evaporation pipe (11), the heat transfer pipes (3) of the heat exchanger (3)
When hot water is circulated in a) and the fan (4) is activated, the fan (4) causes the duct (2) to flow through the suction port (21).
The outside air sucked inside is the heat transfer tubes (3a) of the heat exchanger (3).
When passing between them, they are heated to about 1 ° C., and this heated air is blown out from the blowout port (22) and sent to the lower side of the liquefied gas evaporator (10) where white smoke is accumulated. Then, the white smoke is erased by being mixed with the heated air. In this case, since the white smoke is prevented from being diffused by the enclosure (6), the white smoke prevention device (1) effectively eliminates the white smoke.

Even after the white smoke is erased, the white smoke prevention device (1) is continuously operated during the operation of the liquefied gas evaporator (10) to liquefy the heated air from the outlet (22). As a result of warming the air around the gas evaporator (10), generation of white smoke can be prevented in advance. Moreover, the heat exchange efficiency of the liquefied gas evaporator (10) itself can be improved.

[0017]

According to the device for preventing white smoke of a liquefied gas evaporator according to the present invention, white smoke generated during operation of the liquefied gas evaporator and accumulated below the evaporator is blown out from the outlet of the duct. Can be reliably erased with heated air. Also,
If the white smoke prevention device is continuously used during the operation of the liquefied gas evaporator, the temperature of the surrounding air of the liquefied gas evaporator rises due to the heated air, so that the generation of white smoke can be prevented in advance. The heat exchange efficiency of the liquefied gas evaporator itself can also be improved.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view showing an embodiment of the present invention and schematically showing a white smoke prevention device of a liquefied gas evaporator.

[Explanation of symbols]

 (1) ... White smoke prevention device (2) ... Air supply duct (21) ... Suction port (22) ... Blowout port (3) ... Heat exchanger (air heater) (4) ... Fan (blower) (10) ) ... Liquefied gas evaporator

Claims (1)

[Claims] 1. An air supply duct (2), an air heater (3) provided in an intermediate portion of the duct (2), and an air inlet (21) for sucking and heating air from the suction port (21) of the duct (2). It consists of a blower (4) that blows the air heated by the device (3) from the blowout port (22), and the heated air blown from the blowout port (22) is sent below the liquefied gas evaporator (10). A white smoke prevention device for liquefied gas evaporators.