KR20080082367A - Structure of the semi-enclosed type cargo compressor room and motor room for liquefied gas cargo carriers - Google Patents

Abstract

A structure of a semi-enclosed type cargo compressor and motor room for a liquefied gas cargo carrier is provided to reduce cost without a fire extinguisher, a gas detector, and the like by forming natural draft windows and an opening in the cargo compressor room in order to smoothly send air. A structure of a semi-enclosed type cargo compressor and motor room(10) for a liquefied gas cargo carrier includes a motor(18), natural draft windows(15), and an opening(14). The motor is an explosion proof type and installed in the cargo compressor room to drive a compressor(17). The natural draft windows are formed on both side surfaces and a front surface, which is a stem side of the carrier. The opening is formed on a rear surface, which is a stern side of the carrier. The natural draft windows are louvers in which narrow plates are obliquely arranged at regular intervals in a horizontal direction.

Description

Structure of the Semi-enclosed type Cargo Compressor Room and Motor Room for Liquefied Gas Cargo Carriers

1 is a plan view of a ship including a structure applied in the prior art.

Figure 2 is a side view of a ship including a structure applied in the prior art.

3 is a plan view of a ship including the structure of the present invention.

4 is a right side cross-sectional view of a vessel including the structure of the present invention.

5 is a left side cross-sectional view of a vessel including the structure of the present invention.

Figure 6 is a rear longitudinal cross-sectional view of a vessel including the structure of the present invention.

Figure 7 is a front longitudinal cross-sectional view of a vessel including the structure of the present invention.

8 is a plan view of a ship with some modification of the structure of the present invention.

Explanation of symbols on the main parts of the drawings

10: cargo compressor chamber 14: opening

15 natural ventilation window 16 cargo tank

17 compressor 18 electric motor

21: power ventilator 23: fixed fire extinguishing device

24: gas detector

The present invention relates to a semi-hermetic cargo compressor room and a motor room structure of a liquefied gas cargo carrier, and more particularly, a facility for storing, producing, or vaporizing a cargo on a ship carrying flammable or toxic liquefied gas cargo and at sea. Remove the gastight bulkhead between the cargo compressor room with the equipment to compress the vaporized cargo in the liquefied state or the compression and liquefaction of the vaporized cargo in the offshore floating equipment equipped with the By installing several natural ventilation windows on both sides and the bow, it is possible to drastically improve workability when performing piping and electric wire work by removing or reducing related devices and facilities, and to significantly reduce the cost of equipment itself. Invented.

In general, ships carrying flammable liquefied liquefied gas cargoes (LNG vessels, LNG-RV vessels, LPG vessels, ETHYLENE vessels, etc.) and offshore flotation facilities (FSRU, FPSO) equipped with storing, producing or vaporizing flammable liquefied gas cargoes, 1 and 2 are provided for the purpose of compressing boil-off gas, which is naturally generated by external heat penetration, as a fuel of a propulsion engine or a power generating device, or for protecting and isolating a device designed for reliquefaction. As such, the cargo compressor compartment 10, the motor compartment 11, and the airlock 13, which are separate spaces, should be provided.

At this time, the cargo compressor room 10 should be installed in the upper deck and the cargo area, unless otherwise approved by the Society, the cargo compressor 17 is driven by a shaft through the bulkhead, the partition is equipped with an effective lubricator The electric motor compartment 11 in which the electric motor 18 which drives the cargo compressor 17 by installing the excited gas chamber or permanent gas chamber is arrange | positioned is maintained in a safe zone.

In addition, the electric motor 18 for driving the cargo compressor 17 is installed in the motor chamber 11 separated from the cargo compressor chamber 10 by the gas tight partition 12. Between the driven cargo compressor 17 and the shaft 19 of the electric motor 18, a flexible coupling or other suitable device capable of maintaining the shaft center is provided, and the shaft 19 penetrates the gas tight partition 12. Wherein the gland is installed, in this case, the electric motor 18 has a form provided in the electric motor chamber 11 as a general electric motor.

In addition, the electric motor compartment 11 should be provided with an airlock 13 to maintain the safety zone, and installed between the gas dangerous place on the open exposure deck and the gas safety place to ensure that the gas mill can be reliably maintained. It is configured to install two forced doors, which are self-closing.

In addition, the audible audible alarm device for informing the alarm when one of the two doors in the aerolock 13 is not closed is installed in both compartments separated by the aerolock 13, and the vessel handling the flammable cargo. In the case of approved safe type electrical installations in a space protected by aerolocks 13, it is specified that it shall not be energized when the area is not in overpressure.

On the other hand, in the cargo compressor room 10, a fixed fire extinguishing device prescribed in accordance with the SOLAS requirements is installed, and the cargo compressor room 10 and the motor room 11 area are fixed to be controlled outside these areas. Power ventilators 21 and 22 are installed.

At this time, the exhaust type of the fixed power ventilator (21, 22) is installed in the cargo compressor chamber 10, the air supply is installed in the electric motor chamber 11, and also in these areas, that is, the cargo compressor chamber 10 and the motor chamber 11 and the airlock 13 are provided with a fixed gas detection device.

However, in the related art, gas seal bulkheads 12 are provided between the chambers so that the cargo compressor chamber 10 and the motor chamber 11 can be separated as described above, and the airlock 13 is installed in the motor chamber. If necessary, and additionally related facilities such as a fixed fire extinguishing device, power ventilator, gas detector, etc. must be installed, the shaft of the electric motor 18 for driving the cargo compressor 17 in the gas tight bulkhead 12 19) There is a problem in that the workability is deteriorated as well as the facility cost itself is greatly increased when installing or for pipe work and wire laying work therefor.

The present invention has been made in order to solve such a conventional problem, a ship for transporting flammable or toxic liquefied gas cargo (or marine floating equipment with a facility that can store, produce or vaporize the cargo at sea) Explosion-proof electric motor is adopted instead of the conventional general motor used to drive the compressor, and the gas seal bulkhead and airlock between the cargo compressor compartment and the motor compartment are removed, and a natural ventilation window is provided on the front (front part) and both sides of the compressor compartment. By adopting an open structure in the rear (stern part), the gas seal bulkhead and aerolock, which have been installed in the prior art, can be removed, and the fixed fire extinguisher, the power ventilator, and the gas detector are removed or reduced as necessary. Can greatly improve the workability according to the installation of the equipment, as well as equipment cost To provide a substantially semi-hermetic compressor storage chamber and the motor chamber structure for a liquefied gas cargo carriers to reduce it is an object.

The structure of the present invention for achieving the above object is installed in a marine floating facility equipped with a vessel for transporting a flammable liquefied gas cargo and a flammable liquefied gas cargo, evaporation naturally generated by external heat penetration Compressor is installed in the cargo compressor chamber in the construction of a rectangular box cargo compressor chamber is installed for the purpose of compressing the gas to be used as fuel of the propulsion engine or power generating device, or to protect and isolate the device designed for liquefaction. The motor that drives the engine is adopted as an explosion-proof motor without the risk of explosion, and natural ventilation windows are installed at the front and rear sides of the cargo compressor chamber and the front part of the bow part, respectively, and the opening is provided at the rear part of the stern part. It characterized in that the formed.

In this case, the natural ventilation window is characterized in that the louver (Louver) of the structure arranged in a horizontally arranged at a predetermined interval at a narrow narrow plate, the opening is characterized in that the open type.

In the compressor chamber, a fixed fire extinguishing device or a power ventilator and a gas detector are additionally installed as necessary.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 shows a plan view of a ship including the structure of the present invention, Figure 4 shows a right cross-sectional view of the ship including the structure of the present invention, Figure 5 shows a left cross-sectional view of a ship including the structure of the present invention. 6 shows a rear longitudinal cross-sectional view of a ship including the structure of the present invention, FIG. 7 shows a front longitudinal cross-sectional view of a ship including the structure of the present invention, and FIG. 8 shows a part of the structure of the present invention. The plan view of the modified ship is shown.

According to the present invention, the structure of the present invention is installed on the upper surface of the cargo tank 16 of the ship transporting the combustible liquefied gas cargo to compress the boil-off gas naturally generated by the external heat penetration to be used as a fuel of the propulsion engine or power generating device In the construction of a rectangular box cargo compressor chamber 10, which is installed for the purpose of protecting and isolating a device designed for liquefying or re-liquefying,

As the electric motor 18 installed in the cargo compressor chamber 10 to drive the compressor 17, an explosion-proof electric motor is installed that does not cause an explosion, and the front and rear sides of the cargo compressor chamber 10 and the bow side are used. Each of the front portion is provided with a natural ventilation window 15, the rear portion of the stern is characterized in that the opening 14 is formed.

At this time, the natural ventilation window (15) is characterized in that the louver (Louver) of the structure arranged horizontally at a predetermined interval at a narrow narrow plate.

In addition, the opening 14 formed in the stern portion that is the rear portion of the cargo compressor chamber 10 is characterized in that the open structure.

In addition, in the compressor chamber 10, a fixed extinguishing device 23 is additionally installed as necessary, or a power ventilator 21 and a gas detector 24 are additionally installed.

Referring to the effects of the present invention configured as described above are as follows.

First, in the cargo compressor chamber and the motor chamber structure of the present invention, in the cargo compressor chamber 10 of the known liquefied gas cargo carrier, it is installed in the cargo compressor chamber 10 to drive the compressor 17. Explosion-proof electric motor is adopted as the electric motor 18, and natural ventilation type windows 15 are respectively installed at the front, rear, front and rear sides of the cargo compressor chamber 10, and the opening 14 is provided at the rear part of the stern. What was formed is the main technical configuration.

That is, in the conventional cargo carrier, instead of installing the explosion-proof electric motor 18 without the risk of explosion instead of the general electric motor installed in the electric motor chamber formed to be distinguished from the cargo compressor chamber through the gas tight bulkhead, the compressor 17 is conventionally installed. The gas seal bulkhead, which was installed between the cargo compressor compartment and the motor compartment, was removed to integrate both chambers and to remove the aerolocks installed in the conventional motor compartment.

In addition, the front (front side) and both side portions of the compressor chamber 10, which were all hermetically sealed, are provided with a natural ventilation window 15 having a configuration that allows ventilation by natural convection, and a rear side (stern). The side) formed an opening 14 to allow the gas introduced into the compressor chamber 10 to be naturally discharged to the outside or diluted through alternating current and convection with the outside air, thereby lowering its concentration.

In this way, by installing the electric motor 18 driving the compressor 17 in an explosion-proof type rather than a general electric motor, the gas tight partition wall installed between the cargo compressor chamber and the motor chamber can be removed to prevent the gas from flowing into the motor chamber. In addition, the airlock installed at the inlet of the motor compartment can be removed to push out the compressed air and to have a pressure higher than atmospheric pressure, thereby eliminating the need for installation of gastight bulkheads and airlocks, as well as maintaining the air tightness. Piping and wire connection work for connecting the shaft of the motor placed in the chamber to the compressor through the gas-tight bulkhead is unnecessary or simple, thereby greatly improving workability.

In addition, as described above, a natural ventilation window 15 is installed on the front and both side portions of the compressor chamber 10, and the rear portion forms an opening 14 so that the gas introduced into the compressor chamber 10 is naturally convection. If only the flow of air is smoothly discharged to the outside through the air through the natural ventilated window 15 installed in the front and both sides of the compressor chamber 10, the air introduced into the compressor chamber is the compressor chamber Since the natural gas is discharged to the outside through the opening 14 together with the gas inside, there is no danger of generating a fire by the gas present in the compressor chamber, so that the fixed fire extinguishing device 23 installed in the compressor chamber 10 is not included. The installation can be eliminated, and forced ventilation of the gas detector, compressor chamber, motor compartment and aerolock, which detects the concentration of gas into the compressor chamber The installation of power ventilators, etc., can also be eliminated, which significantly reduces the cost of equipment.

At this time, the naturally ventilated window 15 adopts a louver having a structure in which a narrow plate is arranged horizontally at an interval at a predetermined interval so that the seawater or rainwater during the operation or anchorage of the vessel is the natural ventilated window. Through 15, it is possible to prevent the inflow into the compressor chamber 10, it is possible to prevent damage to the various related equipment installed in the compressor chamber due to the inflow of seawater or rainwater.

In addition, the opening 14 formed at the rear of the compressor chamber 10 maintains an open structure there.

On the other hand, when the ambient air flow of the compressor chamber 10 is not smoothly performed in the ship in operation or berth, as described above, the natural ventilation window 15 is installed on the front and both sides of the compressor chamber 10 and Even if the rear surface is formed with the opening 14, there is a fear that the air inside and outside the compressor chamber may not be convection smoothly (that is, natural ventilation may not be performed well).

Therefore, in the present invention, a fixed fire extinguishing device 23 is additionally installed in the compressor chamber 10 as necessary to immediately extinguish in case of fire.

In addition, in the compressor chamber 10, a gas detector 24 and a power ventilator 21 are installed to operate independently or in parallel with the stationary fire extinguishing device 23 as necessary. When the gas is not properly discharged as described above, the gas detector 24 detects the concentration, and when the gas concentration in the compressor chamber 10 is equal to or higher than a predetermined concentration, the power ventilator 21 is removed. By forcibly operating the exhaust air in the compressor chamber to the outside and through the natural ventilation window 15 and the opening 14 to allow the fresh air of the outside to be automatically introduced.

At this time, the air in the compressor chamber 10 is formed to some extent through the natural ventilation window 15 and the opening 14 as compared with the conventionally closed state even when the flow of external air is not smoothly made. Therefore, the fixed fire extinguishing device 23, the gas detector 24 and the power ventilator 21 do not need to be installed in the same number as before, and the number can be greatly reduced, even if these are additionally installed. In comparison, the equipment cost itself is greatly reduced.

On the other hand, the drawings illustrate the state in which the present invention is applied to a vessel for transporting flammable liquefied gas cargo, but is not limited thereto, and can be applied to various offshore floating facilities equipped with storage and production or vaporization facilities. Of course, the effect is the same.

Although the above-described embodiments have been described with respect to the most preferred embodiments of the present invention, it is not limited to the above embodiments, and it will be apparent to those skilled in the art that various modifications can be made without departing from the technical spirit of the present invention.

As described above, according to the structure of the present invention, the compressor is operated in a ship carrying flammable or toxic liquefied gas cargo (or an offshore floating facility equipped with facilities capable of storing, producing or vaporizing cargo at sea). Explosion-proof electric motors are used instead of conventional electric motors used for the purpose, and gas-tight bulkheads and airlocks between the cargo compressor room and the motor room are removed, and natural ventilation windows are installed on the front (front part) and both sides of the compressor room. The stern part adopts an open structure, but if necessary, by removing or reducing the fixed fire extinguishing device, the power ventilator, and the gas detector, the labor cost can be greatly reduced by improving the workability according to the installation of the facilities. In addition, it is a very useful invention, such as significantly reducing the equipment cost itself.

Claims (5)

It is installed on the upper surface of the cargo tank of a ship carrying flammable liquefied liquefied gas and protects the device designed to compress the evaporated gas naturally generated by external heat penetration and use it as fuel of propulsion engine or power generating device or reliquefy In constructing a cargo compressor room installed for the purpose of isolation, Adopt explosion-proof electric motor to drive the compressor installed in the cargo compressor compartment, and the natural ventilation type windows are installed on the front and rear sides of the cargo compressor chamber and the front part of the bow part, respectively, but the opening part is formed in the rear part of the stern part. A semi-hermetic cargo compressor compartment and a motor compartment structure of a liquefied gas cargo carrier. The method according to claim 1, The naturally ventilated window is a louver (Louver) having a structure arranged horizontally at an interval with a narrow plate at a narrow width (Louver) characterized in that the semi-hermetic cargo compressor chamber and electric motor chamber structure of the liquefied gas cargo carrier. The method according to claim 1, The opening is a semi-closed cargo compressor chamber and electric motor chamber structure of the liquefied gas cargo carrier, characterized in that the open type. The method according to claim 1, A semi-hermetic cargo compressor room and a motor room structure of a liquefied gas cargo carrier, characterized in that a fixed extinguishing device is installed in the compressor chamber. The method according to claim 1, A semi-hermetic cargo compressor room and a motor room structure of a liquefied gas cargo carrier, wherein a power ventilator and a gas detector are additionally installed in the compressor chamber.

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