KR200394749Y1 - Apparatus for cooling and dehydrating of compressor room in a gas transporting ship - Google Patents

Abstract

The present invention relates to a cooling and dehumidifying apparatus of a compressor room forming a closed room of a driving motor for operating a compressor for supplying gas fuel required for operation of a liquefied gas transport vessel such as LNG or LPG, and more specifically, a wall of a compressor room. By installing the heat pipe and the condensate discharge means together with the inlet means of the external air on the air to cool and dehumidify the compressor room at the same time, the drive motor due to the overheating of the drive motor and moisture containing a large amount of salt Corrosion can be prevented, thereby greatly extending the service life of the drive motor for the operation of the compressor and at the same time reducing the power consumption for cooling the compressor room, and the internal pressure of the compressor room is at atmospheric pressure. To a higher state, which leads to the introduction of gaseous fuel through the The present invention relates to a cooling and dehumidifying device of a compressor room for a gas carrier that can effectively and fundamentally block the risk of a fire or an explosion accident.

In the dehumidifying apparatus of the compressor room for a gas carrier according to the present invention, an inlet duct 14 of external air having a blower 15 is provided at one side of the compressor room 10 in which the drive motor 11 is installed therein. It is connected to the drive shaft 12 extending from the drive motor 11 through the wall of the compressor room 10 to supply gas fuel to various power generating units or energy production equipment required for the operation of the liquefied gas transport ship. Compressor 13 for the connection is installed, the airtight holding means such as the packing (18b) is installed in the portion where the drive shaft 12 penetrates the wall of the compressor room 10, the other side of the compressor room 10 The heat pipe 21 through which the heat medium liquid is stored therein is installed in the wall so as to maintain the airtightness with the wall, and the heat pipe 21 extending into and out of the compressor room 10 has a plurality of heat transfer fins. (21a) The condensate receiver 22 is fixedly installed on the wall of the compressor room 10 at a lower portion of the heat pipe 21 which is fixedly installed and integrally installed in the compressor room 10. It is characterized in that the check valve 24 is installed in the condensate discharge pipe 23 extending from the through to penetrate the wall of the compressor room 10 to be kept airtight.

Description

Apparatus for cooling and dehydrating of compressor room in a gas transporting ship}

The present invention relates to a cooling and dehumidifying apparatus of a compressor room forming a closed room of a driving motor for operating a compressor for supplying gas fuel required for operation of a liquefied gas transport vessel such as LNG or LPG, and more specifically, a wall of a compressor room. The present invention relates to a heat pipe and a condensate discharge means installed together with an inlet means of external air on the upper surface of the compressor to simultaneously perform cooling and dehumidification of the compressor room.

Generally, a vessel for transporting liquefied natural gas (LNG) or liquefied petroleum gas (LPG) includes various power generating means such as a steam generator for operating a propeller driven turbine. Various energy production facilities are provided for the crew's life, and LNG or LPG loaded on the ship is used as fuel for operating such various power generating means and energy production facilities.

As described above, the gaseous fuel is supplied to various power generating means or energy production facilities for the operation of a liquefied gas transport vessel, by pumping LNG or LPG itself stored in a liquid state inside the adiabatic storage tank. After the rough, the equipment is to be supplied to the engine's combustion chamber, or the gas fuel existing in the gaseous state with a pressure of about 1 bar on the surface of LNG or LPG is sucked directly into the compressor and supplied to the engine's combustion chamber. Is being used.

The latter of the facilities for supplying the gas fuel necessary for the operation of the liquefied gas transport vessel as described above, the inlet side is connected to the upper side of the liquefied gas storage tank, the outlet side is various power generating means or energy In the state where the compressor is installed to be connected to the collector (Collector) for supplying gas fuel to the production equipment side of the compressor, the impeller of the compressor is made of a configuration installed in connection with a drive means such as a drive motor.

As shown in FIG. 1, the driving motor for operating the compressor to supply the gas fuel necessary for the operation of the liquefied gas transport vessel as described above is configured to block the risk of fire or explosion due to leakage of the gas fuel. In a state where it is installed in a separate compressor room 10 in which space and airtightness are maintained, the drive shaft 12 penetrates the wall of the compressor room 10 and is connected to the compressor 13, and the drive shaft 12 penetrates. On the wall of the compressor room 10, there is formed a shaft cover 18 having a bearing 18a for smooth rotation of the drive shaft 12 and a packing 18b as an airtight holding means.

In addition, the cooling device for preventing the overheating of the drive motor 11 by discharging the heat accumulated in the interior of the compressor room 10 in accordance with the operation of the drive motor 11, one side of the compressor room (10) An inlet duct 14 of external air having a blower 15 is connected to an upper side of the wall, and an outlet duct 16 of an internal air having an air blower 17 is connected to a lower side of the wall. It is.

However, the conventional cooling device of the gas carrier ship compressor room as described above induces the outside air into the interior of the compressor room 10 and at the same time to discharge the internal air of the compressor room 10 drive motor 11 Overheating of the to some extent can be prevented, but considering that the external air flowing into the compressor room 10 is generated from the sea level was to cause an undesirable problem in terms of preventing corrosion of the drive motor (11).

That is, the air flowing into the compressor room 10 during the operation of the gas transport vessel is a highly corrosive air having a large amount of salt generated from the sea surface and high humidity, and such external air is inside the compressor room 10. Since it is always stored at a constant concentration in the drive motor 11 for the operation of the compressor 13 will cause a problem that is easily corroded or damaged.

When corrosion or damage of the drive motor 11 occurs as described above, it is necessary to repair or replace the drive motor 11 installed in the compressor room 10, due to the risk of fire or explosion due to gas fuel drive motor ( 11) not only has a problem that the repair or replacement work is very demanding, but also the supply of gas fuel by the compressor 13 is not possible during the repair or replacement of the drive motor 11. There was a problem that causes great trouble.

In addition, since the cooling of the compressor room 10 including the driving motor 11 must be performed only by the air volume of the external air by the blower 15 installed in the air inlet duct 14, the capacity of the blower 15 itself increases. In addition, since the blower 15 and the blower 17 must be used at the same time to inlet and discharge the outside air, there is a problem that the overall power loss due to the use of the cooling device is somewhat large.

In particular, in order to prevent the gas fuel from flowing through the interior of the compressor room 10, it is preferable that the internal pressure of the compressor room 10 is maintained at a pressure slightly higher than the atmospheric pressure, which is an external pressure, and continuously operates the blower 15. Nevertheless, since the internal pressure of the compressor room 10 is formed in a state similar to the atmospheric pressure by the air discharge duct 16, it is difficult to completely block the inflow of gas fuel through the compressor room 10 more completely. There was a problem, which causes a problem that the risk of fire or explosion due to gas fuel is always inherent during operation of the gas carrier.

The present invention has been made to solve the above-mentioned problems, the cooling dehumidification device of the compressor room for gas carrier according to the present invention is discharged of the heat pipe and condensate with the inlet means of the outside air on the wall of the compressor room. By installing a means to simultaneously perform the cooling and dehumidification of the compressor room, it is possible to prevent corrosion of the drive motor due to overheating of the drive motor and moisture containing a large amount of salt, thereby preventing the operation of the compressor It greatly extends the service life of the drive motor and at the same time reduces the power consumption for cooling the compressor room.It also allows the internal pressure of the compressor room to be higher than atmospheric pressure. To effectively and fundamentally block the risk of fire or explosion It should be to ensure that as a technical challenge.

The present invention for achieving the above technical problem, the inlet duct of the external air having a blower is connected to one side of the compressor room in which the drive motor is installed therein, and penetrates the wall of the compressor room from the drive motor An extended drive shaft is installed with a compressor for supplying gas fuel to various power generating units or energy production equipment required for the operation of a liquefied gas transport vessel, and a confidentiality such as packing is provided at a portion where the drive shaft penetrates the wall of the compressor room. In the means, the other side wall of the compressor room is provided with a heat pipe in which heat medium liquid is stored therein to maintain airtightness with the wall, and a plurality of heat pipes extending into and out of the compressor room. The heating fins are fixedly installed and extend inside the compressor room. Bit has lower condensate receiving the pipe is fixed to the compressor of the room wall, extending from the condensate receiver is characterized in that the wall of the room in which the compressor is confidential, the check valve installed condensate discharge pipe passing through to remain.

Hereinafter, with reference to the accompanying drawings, the present invention for achieving the above object will be described in detail.

Figure 2 is a side cross-sectional view showing a cooling dehumidifying apparatus of the compressor room for a gas carrier according to the present invention, Figure 3 is an enlarged side cross-sectional view showing the main part of the present invention.

First, the overall configuration of the compressor room for the gas carrier ship is installed in the cooling dehumidification device according to the present invention, as shown in Figure 2, the outer space and airtight to block the risk of fire or explosion caused by the leakage of gas fuel In the state where the drive motor 11 is installed in the compressor room 10 to be maintained, the drive shaft 12 is made to be connected to the compressor 13 through the wall of the compressor room 10, the drive shaft 12 The shaft cover 18 is formed on the wall of the compressor room 10 through which the through hole is interposed with a bearing 18a for smooth rotation of the drive shaft 12 and a packing 18b as an airtight holding means.

In addition, the inlet duct 14 of the external air having the blower 15 is connected to the upper side of the compressor room 10 on one side wall of the compressor room 10, and the configuration corresponds to the main part of the present invention. As the element cools heat accumulated in the compressor room 10 according to the operation of the driving motor 11, moisture in the air introduced into the compressor room 10 through the air inlet duct 14 is cooled. Cooling dehumidifier 20 for removal is provided to be adjacent to the drive motor 11 on the other side wall of the compressor room (10).

The cooling and dehumidifying apparatus 20 corresponding to the main part of the present invention, as shown in Figs. 2 and 3, respectively, in the right wall of the compressor room 10 in the drawing, the heat pipe in which the heat medium liquid is stored therein ( The heat pipe 21 is installed through the packing 25 so that the airtight with the wall is maintained, and extends to the inside and the outside of the compressor room 10 by a predetermined length with respect to the wall. In the plurality of heat transfer fins 21a are fixedly installed.

The heat pipe 21 and the heat transfer fins 21a are preferably made of stainless steel or other similar metal material having excellent thermal conductivity and corrosion resistance, and the heat pipe 21 and the heat fin 21a may be formed over the entire length of the heat pipe 21. The heat medium liquid stored therein may be any kind of heat transfer fluid capable of rapid heat exchange between the internal temperature and the external temperature of the compressor room 10, but the most representative ones are shown in Table 1 below.

Table 1: Types of thermal fluids and their conditions of use

Thermal fluid Melting Point (℃) Boiling Point (℃) Usable temperature range (℃) Aceton -95 57 0 to 120 (optimum) Methanol -98 64 10 to 130 (optimal) Water 0 100 30 to 200 (recommended) Flutex PP ⁹ (trade name) -70 160 0-225 (recommended)

3, the heat pipe 21 and the heat transfer fins 21a have a fin-tube type heat transfer structure, but the internal temperature and the external temperature of the compressor room 10 are shown. Any type of heat transfer structure may be applied as long as it can achieve rapid heat exchange with each other. In some cases, only dozens of heat pipes 21 may be installed as heat transfer means without using heat transfer fins 21a. It may be.

And, directly below the heat pipe 21, which extends into the compressor room 10, the plate condensed on the surface of the heat pipe 21 and the heat transfer fins 21a to receive condensed water falling down The condensate receiver 22 is fixed to the inside of the wall of the compressor room 10, the condensate discharge pipe 23 for discharging the condensate is connected to the central lower portion of the condensate receiver 22, the condensate receiver 22 ) And the condensate discharge pipe 23 is also made of a material such as stainless steel resistant to corrosion.

In addition, the condensate discharge pipe 23 is installed so as to extend through the right wall of the compressor room 10 in the drawing from the lower portion of the condensate receiving 22 to the outside, the compressor room 10 through which the condensate discharge pipe 23 passes The packing 25 as an airtight holding means is also interposed on the wall of the wall, and a check valve 24 for discharging the condensate in one direction is provided in the condensate discharge pipe 23 extending to the outside of the compressor room 10.

The check valve 24 blocks the inflow of gaseous fuel through the condensate discharge tube 23 even though the condensate is not stored over the condensate receiver 22 and the condensate discharge tube 23, and at the same time, When a certain amount of condensate is stored over the condensate discharge pipe 23, it serves to discharge the condensate by opening the conduit, and it is a separate sensor to use the check valve 24 that can be opened at a relatively low water pressure. However, it is desirable in that it can achieve automatic discharge of condensate even without using a control device.

Hereinafter, described in detail with reference to the accompanying drawings the working relationship of the present invention made of the above configuration as follows.

First, when the compressor 13 is operated as the driving motor 11 so as to supply gas fuel to various power generating units or energy production facilities for the operation of a liquefied gas transport vessel, heat generated from the driving motor 11 is generated. The heat is accumulated in the compressor room 10, and the heat accumulated in the compressor room 10 is primarily generated by the external air introduced through the air inlet duct 14 according to the operation of the blower 15. To cool.

In addition, since the heat medium liquid is stored in the heat pipe 21 of the cooling dehumidifying apparatus 20 according to the present invention, the heat medium liquid evaporates (heat absorption) and condensation (heat dissipation) generated inside the heat pipe 21. And the low temperature outside the compressor room 10 is transferred to the interior of the compressor room 10 through the heat transfer fins 21a and the heat pipes 21 by the circulating action of the heat medium liquid. Since the heat accumulated inside is discharged to the outside, secondary cooling of the compressor room 10 is performed.

Therefore, due to the inflow of outside air by the blower 15 and the transfer of low outside temperature by the heat pipe 21 and the heat transfer fins 21a, the heat accumulated in the compressor room 10 can be cooled quickly and effectively. In addition, the moisture having a high salt concentration contained in the outside air introduced into the compressor room 10 through the air inlet duct 14 is inside the compressor room 10 in the endothermic process due to the evaporation of the heat medium liquid. The dehumidification is simultaneously performed with the cooling of the compressor room 10 by being condensed and removed on the surface of the heat pipe 21 and the heat transfer fins 21a extending to the heat pipe 21.

As described above, the condensed water generated by condensation of the internal moisture of the compressor room 10 is dropped into the condensate receiver 22 provided below the heat pipe 21, and thus the condensate dropped by the condensate receiver 22 is condensed. If a certain amount or more is stored over the receiving 22 and the condensate discharge pipe 23, the check valve 24 installed in the condensate discharge pipe 23 is automatically opened to discharge the condensate to the outside of the compressor room (10).

As described above, the cooling and dehumidifying apparatus of the compressor room for a gas carrier according to the present invention introduces external air into the inside of the compressor room 10 and at the same time the compressor room 10 by the heat pipe 21 and the heat transfer fins 21a. The internal temperature of the heat exchange with the low temperature of the outside, thereby allowing the heat accumulated in the interior of the compressor room 10 can be cooled over a second time, thereby making the internal temperature of the compressor room 10 more quickly. By being able to cool efficiently, the overheating phenomenon of the drive motor 11 can be prevented.

At the same time, water having a high salinity concentration in the air introduced into the compressor room 10 through the air inlet duct 14 is condensed and removed on the outer surfaces of the heat pipe 21 and the heat transfer fin 21a, It is possible to prevent the drive motor 11 installed inside the compressor room 10 from being corroded and damaged by salt and moisture, thereby extending the service life of the drive motor 11 to a greater extent than in the conventional case. Will be.

Therefore, corrosion or damage of the driving motor 11 occurs during the operation of the liquefied gas transport ship, the risk of fire and explosion, and the situation such as stopping the operation of the vessel while taking the situation of repairing and replacing the driving motor 11 The frequency of occurrence can be minimized, which can contribute to the safe operation of the gas carriers.

In addition, it is possible to perform cooling of the compressor room 10 by simultaneously applying heat transfer action of the external temperature by the heat pipe 21 together with the air volume of the external air by the blower 15 installed in the air inlet duct 14. Therefore, not only can the capacity of the blower 15 itself be reduced in comparison with the conventional case, but also the heat pipe 21 and the heat transfer fins 21a are not operated together with the blower 15. Due to the condensation action, the internal pressure of the compressor room 10 is not greatly increased, thereby minimizing the power consumption according to the use of the cooling device.

In particular, since the amount of external air flowing into the compressor room 10 in accordance with the operation of the blower 15 is greater than the amount of water condensed by the heat pipe 21 and the heat transfer fins 21a, the compressor room 10 is provided. The internal pressure of the gas pressure is slightly higher than the atmospheric pressure of the external pressure, which causes the gas fuel through the drive shaft 12, the heat pipe 21 and the condensate discharge pipe 23 through the wall of the compressor room (10) Can be blocked more fundamentally with confidentiality means such as packings (18b) and (25), thereby more fully preventing the risk of fire or explosion by gaseous fuel that may occur during operation of the gas carrier. It will be possible.

The cooling and dehumidifying apparatus of the compressor room for a gas carrier according to the present invention as described above, by installing the heat pipe and the condensate discharge means with the inlet means of the external air on the wall of the compressor room to perform the cooling and dehumidification of the compressor room at the same time. By doing so, it is possible to prevent corrosion and damage of the drive motor due to overheating of the drive motor and moisture containing a large amount of salt, thereby increasing the service life of the drive motor greatly There is an effect that can contribute more to the continuous and safe operation of the carrier.

In addition, the cooling of the compressor room is simultaneously performed by cooling the compressor room by the low external temperature transmitted to the inside of the compressor room by the heat pipe and the heating fin together with the external air introduced into the compressor room by the blower. There is an effect that can be performed more quickly and efficiently, and due to the miniaturization of the blower and the sole use of the blower, it is possible to minimize the power consumption required for cooling the compressor room.

In particular, by keeping the internal pressure of the compressor room slightly higher than the atmospheric pressure, the inflow phenomenon of the gas fuel through the drive shaft, the heat pipe and the condensate discharge pipe through the compressor room together with the airtight means such as packing, more fundamental There is an effect to block, so that it is more effective to prevent the risk of fire or explosion due to gas fuel that can occur during operation of the gas carrier.

1 is a side cross-sectional view showing a conventional cooling device for a gas carrier ship.

Figure 2 is a side cross-sectional view showing a cooling dehumidification apparatus of the compressor room for gas carrier according to the present invention.

Figure 3 is a side sectional view showing an enlarged main portion of the present invention.

<Explanation of symbols for main parts of drawing>

10: compressor room 11: drive motor 12: drive shaft

13 compressor 14 air inlet duct 15 blower

16 air exhaust duct 17 air blower 18 shaft cover

18a: bearing 18b, 25: packing 20: cooling dehumidifier

21: heat pipe 21a: heating fin 22: condensate receiver

23: condensate discharge pipe 24: check valve

Claims (1)

One side of the compressor room 10 in which the drive motor 11 is installed therein is connected to the inlet duct 14 of the external air including the blower 15, and the compressor room 10 is installed from the drive motor 11. Compressor 13 for supplying gas fuel to the power generation unit or energy production equipment side required for the operation of the liquefied gas transport ship is connected to the drive shaft 12 extending through the wall of the drive shaft 12, the drive shaft 12 In the part which penetrates the wall of the compressor room 10, the airtight holding means like the packing 18b is provided, The other side wall of the compressor room 10 is provided with a heat pipe 21 through which heat medium liquid is stored therein so as to maintain airtightness with the wall. A plurality of heat transfer fins 21a are integrally fixed to the heat pipe 21 extending into and out of the compressor room 10. A condensate receiver 22 is fixedly installed on the wall of the compressor room 10 at a lower portion of the heat pipe 21 extending into the compressor room 10. The dehumidifying device of the gas carrier ship compressor room, characterized in that the check valve 24 is installed in the condensate discharge pipe 23 extending from the condensate receiver 22 to penetrate the wall of the compressor room 10 to maintain the airtightness. .