KR102651900B1 - Finishing Structure of Cofferdam Heating Tower - Google Patents

Abstract

In a ship including a membrane-type liquefied gas cargo hold and a cofferdam disposed at the front and rear of the cargo hold, a heating pipe that receives heat medium and supplies heat to the inside of the cofferdam and a return that discharges the heat medium supplied into the heating pipe A cofferdam heating tower made of a complete tower structure including pipes; And a finishing structure of a cofferdam heating tower is disclosed, including a finishing dome that finishes the penetration part where the cofferdam heating tower penetrates the upper hull structure of the cofferdam.
The cofferdam heating tower according to the present invention is a means of heating the interior of the cofferdam by applying the heating tower method instead of the existing heating coil method, and the penetrating part that penetrates the upper hull structure of the cofferdam is closed by an integrated dome structure. Welding convenience is improved and the installation structure is simplified.

Description

Finishing Structure of Cofferdam Heating Tower {Finishing Structure of Cofferdam Heating Tower}

The present invention relates to the structure of the finishing part of a cofferdam heating tower, and more specifically, as a means of heating the inside of the cofferdam of a ship equipped with a liquefied gas cargo hold, and is installed by a heating tower method instead of the existing heating coil method. In particular, the cofferdam is installed using a heating tower method instead of the existing heating coil method. This relates to the structure of the finishing part of a cofferdam heating tower in which the penetrating part that penetrates the upper hull structure of the dam is closed by an integrated dome structure.

In general, cargo ships such as LNGC (LNG Carrier) or LNG RV (LNG Regasification Vessel) have storage tanks (commonly called 'cargo holds') to store cryogenic liquefied natural gas (LNG). It is provided.

LNG cargo holds can be classified into independent type and membrane type depending on whether the load of the cargo acts directly on the insulation material.

In the case of a membrane-type cargo hold, bulkheads having the same cross-sectional shape as the cargo hold are provided at the front and rear of each cargo hold, and the space partitioned by these bulkheads is called a cofferdam. Inside the cofferdam space, a separate system is constructed to protect and withstand the steel plates from changes in the internal temperature of the cargo hold and leakage of LNG.

In addition, the temperature inside the cofferdam must be maintained at a constant level in accordance with the standards required by classification regulations. Typically, a method of installing piping inside the cofferdam and placing a heating coil is used. .

Domestic Patent Publication No. 10-2006-0124860 on ‘Cofferdam heating means for liquefied natural gas carriers’ maintains the temperature inside the cofferdam by placing a zigzag-shaped heating coil on one bulkhead of the cofferdam. According to the prior art, since the heating coil includes a structure that penetrates multiple structures in order to be installed in a zigzag shape, various problems may occur due to the penetration structure of the heating coil pipe.

Specifically, structural reinforcement is required because a number of holes must be formed in the structure to allow the heating coil pipe to pass through. Therefore, there is a problem in that a large number of reinforcement materials are required to be installed and welding work also increases. In addition, if corrosion occurs around the piping hole during the installation of the heating coil piping, additional passivation work to remove it is required, which may reduce the efficiency of the work.

Meanwhile, referring to Figure 1, the lower floor of the cofferdam (C) usually has a bilge well (B) that collects bilge generated from the ship, and liquefied gas leaking from inside the cargo hold or leakage from the insulation system of the cargo hold. A sump well (S) is provided to collect nitrogen, and discharge pipes (10, 20) are installed inside the cofferdam (C) to suction and discharge the fluid collected there.

However, as described above, the conventional heating coil method is a structure in which the heating coil pipe 30 is installed in a zigzag shape inside the cofferdam (C), and the heating coil pipe 30 arranged in a zigzag shape has two discharges. There was a problem in that it was required not to interfere with the pipes 10 and 20, and therefore the internal design of the cofferdam (C) became more complicated.

In addition, conventionally, the two discharge pipes (10, 20) and the heating coil pipe (30) penetrating the ceiling of the cofferdam (C) had to be finished separately, and each pipe had to be finished as shown in FIG. 2. Finishing was done by lapping welding a finishing member called IPP (Individual Piping Penetration) to the penetration part of the hull (H). This method is a fit-up (fit-up) that precedes welding to the hull structure. The downside was that it took a lot of time to do the fut up) work and wrapping welding.

Republic of Korea Patent Publication No. 10-2006-0124860 (2006.12.06)

The present invention is intended to solve various problems that occur due to the excessive installation time of the conventional heating coil method and the occurrence of holes during the installation process of the heating coil piping. The present invention simplifies installation by applying the heating tower method instead of the existing heating coil method. The purpose is to provide a cofferdam heating tower that can significantly increase work convenience by reducing the quantity and welding time.

In particular, the present invention integrates a plurality of pipes installed inside the cofferdam into one integrated tower structure, and the penetrating part penetrating the hull structure at the top of the cofferdam is closed by an integrated dome structure, thereby improving welding convenience and simplifying installation. The technical task is to provide a finishing structure for the cofferdam heating tower that can maximize the effect.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

According to one aspect of the present invention for achieving the above object, in a ship including a membrane-type liquefied gas cargo hold and a cofferdam disposed at the front and rear of the cargo hold, heat is supplied to the inside of the cofferdam by receiving a heat medium. A cofferdam heating tower manufactured as an integrated tower structure including a supply heating pipe and a return pipe for discharging the heat medium supplied into the heating pipe; And the cofferdam heating tower may be provided with a finishing structure of the cofferdam heating tower, including a finishing dome that finishes the penetrating portion penetrating the upper hull structure of the cofferdam.

The finishing dome may be inserted as a sleeve type into the upper deck constituting the upper hull structure of the cofferdam and fixed by welding.

The finishing dome may be provided in the form of an end cap or a hemispherical roof having a '∩' cross-sectional shape.

In order to reinforce the structure of the finishing dome, a plurality of brackets may be formed on the outer peripheral surface of the finishing dome and welded on the upper deck.

The return pipe is installed as an inner pipe inside the heating pipe, and the heating pipe may extend into the interior of the cofferdam through the finishing dome.

The cofferdam heating tower may further include a discharge pipe that suctions and discharges fluid collected in at least one of a bilge well and a sump well formed in the lower portion of the cofferdam.

The cofferdam heating tower includes an ejector installed on the discharge pipe to provide discharge pressure of the discharge pipe; And it may further include a driving pipe that provides driving fluid to the ejector.

The discharge pipe and the driving pipe are arranged to penetrate the side of the finishing dome, and may be bent downward inside the finishing dome to extend into the interior of the cofferdam.

The cofferdam heating tower may further include a nitrogen charging pipe for charging nitrogen gas into the insulating space formed within the cargo hold.

The nitrogen charging pipe is arranged to penetrate the side of the finishing dome, and may be connected to a nitrogen charging line that connects from the upper part of the cofferdam to the cargo hold and charges nitrogen gas into the insulating space.

The nitrogen charging pipe can receive nitrogen from a nitrogen supply device provided inside the ship and deliver it to the nitrogen charging line.

The present invention provides a completely new type of cofferdam heating tower that is configured in a tower shape, unlike the existing heating coil method, as a means of heating the cofferdam inside a ship.

The cofferdam heating tower according to the present invention is not a method of installing a heating coil within a pipe, but a method of emitting heat from the pipe itself through which the heat medium is supplied. Heat can be supplied to the inside of the cofferdam by utilizing a wider cross-sectional area. Therefore, there is an effect of maintaining the inside of the cofferdam at the required appropriate temperature within a short period of time.

In addition, the cofferdam heating tower according to the present invention has a greatly simplified installation structure, enabling a reduction in the amount of piping and reinforcement materials, and significantly increasing the convenience of installation work due to a reduction in welding time.

In particular, the cofferdam heating tower according to the present invention is finished with an integrated dome structure in which the penetrating part that penetrates the hull structure of the upper part of the cofferdam is provided as a sleeve type, thereby eliminating the fit-up work for wrapping welding that was previously performed and Multiple full penetration welding operations can be reduced, and the effects of welding convenience and installation simplification are maximized, resulting in a significant shortening of field construction time.

The effects of the present invention are not limited to the effects described above, and other effects not mentioned may be clearly understood from the description below.

Figure 1 is a diagram showing the internal structure of a cofferdam to which a conventional heating coil method is applied.
Figure 2 is a diagram showing the structure of the finished portion of a conventional heating coil pipe.
Figure 3 is a diagram showing the internal structure of a cofferdam in which a cofferdam heating tower according to the present invention is installed.
Figure 4 is a diagram showing the upper structure of the cofferdam heating tower according to the present invention.
Figure 5 is a view looking down from above on a cofferdam heating tower according to the present invention.
Figure 6 is a diagram showing the lower structure of the cofferdam heating tower according to the present invention.

In order to fully understand the present invention, its operational advantages, and the purposes and effects achieved by practicing the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

Matters expressed in the drawings attached to this specification may be somewhat different from the form actually implemented in schematic drawings to easily explain the embodiments of the present invention, and the sizes of each component shown in the drawings are for explanatory purposes. It can be exaggerated or reduced and does not mean the size that is actually applied.

Additionally, the terms used herein are merely used to describe specific embodiments and are not intended to limit the invention. For example, in this specification, “including” a certain component does not mean excluding other components, but may further include other components, unless specifically stated to the contrary.

In addition, it should be understood that saying that a component is 'connected' to another component includes direct connection as well as indirect connection, and that other components may exist between the two components. Singular expressions may be interpreted to include plural expressions unless the context clearly indicates otherwise.

The cofferdam heating tower of the present invention described below can be applied to various ships equipped with a membrane-type cargo hold for storing liquefied gas.

Here, ‘vessel’ refers to ships with self-propulsion, such as the aforementioned LNGC or LNG RV, as well as ships floating on the sea, such as LNG FPSO (Floating, Production, Storage and Offloading) or LNG FSRU (Floating Storage and Regasification Unit). It can be interpreted to include all structures.

In addition, the most representative 'liquefied gas' stored in cargo holds is LNG, as well as LPG (Liquefied petroleum gas), LEG (Liquefied Ethane Gas), Liquefied Ethylene Gas, and Liquefied Propylene Gas. It can include all types of liquefied gases that can be liquefied at low temperatures and stored/transported.

Hereinafter, the present invention will be described in detail by explaining preferred embodiments of the present invention with reference to the accompanying drawings. The embodiments described below are provided so that those skilled in the art can easily understand the technical idea of the present invention, and the present invention is not limited thereto.

Figure 3 is a diagram showing the internal structure of a cofferdam in which a cofferdam heating tower according to the present invention is installed. Figure 4 is a diagram showing the upper structure of the cofferdam heating tower according to the present invention. Figure 5 is a view looking down from above on a cofferdam heating tower according to the present invention. And Figure 6 is a diagram showing the lower structure of the cofferdam heating tower according to the present invention.

Referring to the attached drawings, the cofferdam heating tower 100 according to the present invention can be installed vertically in the inner space of the cofferdam (C) installed at the front and rear of the liquefied gas cargo hold inside the hull.

The cofferdam heating tower 100 according to the present invention includes a heating pipe 110 that supplies heat to the inside of the cofferdam (C) by flowing a heat medium through the internal space; And a return pipe 120 that discharges the heat medium supplied to the heating pipe 110 back to the outside may be provided in a form included in the entire tower structure.

The heating pipe 110 serves to supply heat to the inside of the cofferdam (C) by receiving a heat medium such as glycol water. In other words, the present invention is not a method of installing a heating coil within a pipe as in the prior art, but a method of discharging heat from the pipe itself through which the heat medium is supplied. Heat can be supplied to the inside of the cofferdam by utilizing a wider cross-sectional area. Therefore, there is an effect of maintaining the inside of the cofferdam at the required appropriate temperature within a short period of time.

A filling pipe 111 is connected to the upper part of the heating pipe 110 to supply heat medium at a predetermined pressure, and to the lower part of the heating pipe 110 to remove residual water in the pipe during a hydro test or maintenance. A drain valve (not shown) may be installed for this purpose.

The return pipe 120 discharges the heat medium supplied into the heating pipe 110 back to the outside, and may be configured as an inner pipe of the heating pipe 110. That is, in the present invention, the heating pipe 110 is configured in the form of a double pipe and the heat medium is supplied through the outer pipe, and the inner pipe can function as a return pipe 120 that discharges the heat medium supplied to the outer pipe back to the outside. .

A hole in communication with the heating pipe 110 may be formed at the lower end of the return pipe 120, and when the heat medium is supplied from the upper side of the heating pipe 110 through the filling pipe 111, it will be present inside the heating pipe 110. The existing heat medium is pushed upward and discharged through the return pipe 120 by the new supply pressure.

Meanwhile, as shown in Figure 3, a bilge well (B) and a sump well (S) may be formed at the bottom of the cofferdam (C) of the present invention. As ships have become increasingly larger in recent years, the size of cargo holds is also increasing. Accordingly, in the present invention, unlike the existing bilge well and sumpwell, which were installed in both directions of the cofferdam (see Figure 1) spaced apart from each other, the bilge well (B) is installed in a plurality of areas inside the cofferdam (C). and sumpwell (S) can all be formed in close proximity. Figure 3 shows that two areas where the bilge well (B) and sump well (S) are formed inside the cofferdam (C), but of course, more areas can be formed.

The cofferdam heating tower 100 according to the present invention includes a first discharge pipe 130 for suctioning and discharging the fluid (bilge) collected in the bilge well (B) formed at the bottom of the cofferdam (C), It can be manufactured as an integrated tower structure, including a second discharge pipe 140 to suction and discharge the fluid (leaked liquefied gas/nitrogen) collected in the sumpwell (S) formed at the bottom of the cofferdam (C). there is.

The first discharge pipe 130 suctions the fluid collected in the bilge well (B) and discharges it to the outside, and the second discharge pipe 140 serves to suction the fluid collected in the sump well (S) and discharges it to the outside. Do it. In the present invention, since the bilge well (B) and the sump well (S) are formed close to each other inside the cofferdam (C), the first discharge pipe 130 and the second discharge pipe 140 are integrated into one tower structure. It can be configured.

At this time, the present invention can provide discharge pressure using an ejector without a separate pump to discharge the fluid collected in the bilge well (B) or sump well (S).

More specifically, referring to FIG. 6, a first ejector 131 is installed on the first discharge pipe 130 to provide discharge pressure of the fluid collected in the bilge well (B). Here, the ejector is a device that receives driving fluid and uses its pressure to suck in the suction fluid. Therefore, in order to drive the first ejector 131, a configuration that supplies driving fluid is required. .

To this end, the cofferdam heating tower 100 according to the present invention may further include a driving pipe 150 for supplying driving fluid to the first ejector 131 installed on the first discharge pipe 130. there is. In addition, the present invention can supply firefighting water as a driving fluid by connecting a fire line disposed in the main passage way of the ship with the driving pipe 150.

In Figure 6, only the lower part of the second discharge pipe 140 is shown to help understand the structure of the present invention, but a second ejector (not shown) is also installed on the second discharge pipe 140 to form a sump well (S). It is possible to provide discharge pressure of the fluid collected, and the driving pipe 150 is provided as a branch or individual line to provide driving pressure to the second ejector (not shown). Of course, the driving pipe 150 connected to the second ejector (not shown) can also be connected to the ship's fire piping line to supply firefighting water as a driving fluid.

As described above, the configuration to provide discharge pressure of the discharge pipes (130, 140) using an ejector instead of the existing pump is combined as one component of the cofferdam heating tower (100) of the present invention, which is manufactured as an integrated tower structure. It is designed to simplify the structure of the discharge pipes (130, 140) to make it easier to discharge.

On the other hand, the cofferdam heating tower 100 according to the present invention may further include a sounding pipe 160 for measuring the amount by measuring the depth of the fluid collected in the bilge well (B) or sump well (S). You can. Although only one sounding pipe 160 is shown in the drawing, it goes without saying that two sounding pipes 160 may be provided to correspond to each of the bilge well (B) and sump well (S).

The sounding pipe 160 may be configured to measure the water level of the bilge well (B) or sump well (S) by lowering a weight inside the pipe, and like the return pipe 120, the inside of the heating pipe 110 However, the placement location is not necessarily limited to this, and may be arranged outside the heating pipe 110 if necessary.

The cofferdam heating tower 100 of the present invention can be installed by manufacturing the plurality of pipes 110 to 160 as described above into a tower-shaped integrated structure from the outside and then inserting them into the cofferdam (C).

In addition, the cofferdam heating tower 100 according to the present invention includes a guiding ring 170 that guides the installation of pipes during the manufacturing process, and a guide ring 170 that is installed spaced apart along the height direction of the tower structure and restrains and supports a plurality of pipes. It may further include a support 180 and a finishing dome 190 as a structure for fixing a plurality of pipes at the upper end.

The support 180 is a reinforcing material that supports a plurality of pipes constituting the cofferdam heating tower 100. At this time, in the cofferdam heating tower 100 of the present invention, the heating pipe 110 can function as a main structural member supporting the load of the entire structure, and therefore the support 180, unlike conventional piping reinforcement, has a plurality of Welding is not required, and it is possible to provide a minimal amount of support to support the pipes outside the heating pipe 110, which can be viewed as the main pipe.

In addition, the support 180 does not need to be fixed to a separate location inside the cofferdam C, and may be required only to the extent that the outer pipes can be supported through the heating pipe 110, which is the main structural member.

The support 180 may also be installed inside the guide ring 170 and may serve to prevent the plurality of pipes from lateral movement. In addition, the support 180 may function as a heat sink plate that prevents temperature rise by dissipating heat generated in the pipes constituting the cofferdam heating tower 100.

4 and 5, the finishing dome 190 fixes and supports the upper ends of the plurality of pipes 110 to 160 constituting the cofferdam heating tower 100, and the plurality of pipes form the cofferdam ( C) It is a structure configured to finish the penetrating part penetrating the upper hull structure at once, and is provided to greatly simplify the installation structure of the cofferdam heating tower 100 according to the present invention and improve welding convenience. am.

The finishing dome 190 can be provided in the form of an end cap or a hemispherical roof with a '∩' cross-sectional shape, and the lower end is a sleeve type on the upper deck that constitutes the upper hull structure of the cofferdam (C). It can be inserted into and fixed by welding. That is, the lower end of the finishing dome 190 penetrates the upper deck and is inserted to a predetermined depth, and the outer peripheral surface can be fixed to the upper deck by welding.

Additionally, a bracket 191 may be formed on the outer peripheral surface of the finishing dome 190 for structural reinforcement. The bracket 191 serves as a stopper to prevent the finishing dome 190 from being inserted beyond a certain depth, and is welded on the upper deck together with the finishing dome 190 to reinforce the connection structure.

In the present invention, a plurality of pipes 110 to 160 constituting the cofferdam heating tower 100 are introduced into the cofferdam (C) through the finishing dome 190, and the finishing dome 190 penetrates. It can serve to fix and support the upper ends of the pipes.

Looking more specifically at the structure in which the plurality of pipes 110 to 160 penetrate the finishing dome 190, the heating pipe 110, which serves as the main structural member, vertically extends the upper end of the finishing dome 190. The return pipe 120 and the sounding pipe 160, which are installed to penetrate and are therefore formed inside the heating pipe 110, can also be naturally arranged in a vertical direction. The first discharge pipe 130, the second discharge pipe 140, and the driving pipe 150 are arranged to penetrate the side of the finishing dome 190, and are bent downward inside the finishing dome 190 to form a copper It may extend toward the bottom of the dam (C).

Flanges may be provided at the ends of the plurality of pipes 110 to 160 described above, so that a connection structure with lines performing functions corresponding to each pipe may be formed. In the case of the heating pipe 110, a flange may be provided at the end of the filling pipe 111.

Meanwhile, the cargo hold provided in the ship according to the present invention may be a membrane type cargo hold including a primary barrier and a secondary barrier, and the insulation formed between the primary barrier and the secondary barrier The space (hereinafter referred to as 'primary insulation space') and the insulation space formed between the secondary barrier and the hull (hereinafter referred to as 'secondary insulation space') may be filled with nitrogen gas as an inert gas.

As described above, a nitrogen charging line must be provided for charging nitrogen gas into the primary and secondary insulation spaces formed in the cargo hold, and the cofferdam heating tower 100 according to the present invention is designed to supply nitrogen to each insulation space. It may further include a primary nitrogen charging pipe (NP1) and a secondary nitrogen charging pipe (NP2).

The primary nitrogen charging pipe (NP1) is the primary insulating space formed inside the cargo hold and is connected to the nitrogen charging line that charges nitrogen gas, and the secondary nitrogen charging pipe (NP2) is the secondary insulating space formed inside the cargo hold. It can be connected to a nitrogen charging line that charges nitrogen gas. The primary and secondary nitrogen charging pipes (NP1, NP2) can receive nitrogen gas from, for example, a nitrogen generator provided inside the ship and deliver it to each nitrogen charging line, and the nitrogen charging line is located at the top of the cofferdam (C). It can be connected to the cargo hold.

Briefly looking at the manufacturing and installation process of the cofferdam heating tower 100 according to the present invention, a plurality of pipes constituting the cofferdam heating tower 100, a guiding ring 170 for guiding and supporting the same, and a support ( 180) And after the finishing dome 190 is manufactured as an integrated tower structure, installation can be performed by inserting the cofferdam heating tower 100 into the cofferdam using a crane, etc. when assembling the hull.

At this time, the cofferdam heating tower 100 may be supported by a support 200 installed on the bottom surface of the cofferdam C, as shown in FIG. 6, and the cofferdam heating tower 100 can be supported by the support 200. ) The installation and mounting of the cofferdam heating tower 100 can be completed by welding and fixing the upper finishing dome 190 to the upper deck side while it is supported on the top. Once mounting of the cofferdam heating tower 100 is completed, it can be finished by connecting external pipes to the flanges formed at the ends of the pipes constituting the cofferdam heating tower 100.

In other words, the present invention can be said to propose a method of manufacturing the cofferdam heating tower 100 as an integrated structure in the form of a tower, mounting it at the hull assembly stage, and then finishing it by connecting piping in the preceding design process, and manufacturing it as a single piece. It can be installed in a simple manner by mounting the tower structure as one piece, which has the effect of significantly increasing the convenience of installation and mounting work.

In addition, in the present invention, the support 180 may be provided to a minimum so that the remaining pipes formed on the outside of the heating pipe 110 can be supported through the heating pipe 110, which is the main structural member, and may be provided by welding or bolting. It can be easily combined through. Therefore, since the present invention does not require the installation of U-bolts and other reinforcement materials required when installing pipes in the existing heating coil method, it is possible to reduce the quantity of pipes and reinforcement materials, and welding work can be greatly reduced.

In addition, the various pipes provided in the cofferdam heating tower 100 of the present invention do not include a conventional penetrating structure, and the connection of these pipes can also be implemented by welding or bolting, increasing convenience for installation and welding. The positive effect of simplifying work in confined areas is expected.

In addition, the cofferdam heating tower 100 according to the present invention includes a heating pipe 110 and a return pipe 120 for continuously supplying heat to the inside of the cofferdam (C). Not only does it have the original function as a heating device, but it also has discharge pipes (130, 140), drive pipes (150), and sound lamp pipes (160) related to suction and water level measurement of the bilge well (B) and sump well (S). , and, if necessary, nitrogen charging pipes (NP1, NP2) are all integrated into one tower structure.

Therefore, the present invention solves the inconvenience of having to separately configure the piping line for suction of the bilge well or sump well in addition to the device for heating the cofferdam in the prior art, and provides a configuration for performing these functions. By providing an integrated cofferdam heating tower 100 that can be built as one, the effects of reducing volume and increasing work convenience due to structure simplification can be maximized.

In addition, the present invention allows installation of a plurality of pipes as described above at once, and the penetrating portion where the plurality of pipes penetrate the hull structure above the cofferdam (C) can also be closed at once by an integrated dome structure. By providing the finished structure of the cofferdam heating tower, the effects of welding convenience and installation simplification can be maximized and ultimately the on-site construction time can be significantly shortened.

The present invention is not limited to the described embodiments, and it is obvious to those skilled in the art that various modifications and changes can be made without departing from the spirit and scope of the present invention. Accordingly, such modifications or variations should be considered to fall within the scope of the claims of the present invention.

100: Cofferdam heating tower
110: Heating pipe
111: Filling pipe
120: return pipe
130: first discharge pipe
131: first ejector
140: Second discharge pipe
150: driving pipe
160: Sounding pipe
170: Guiding ring
180: Support
190: Finishing dome
NP1: Primary nitrogen charging pipe
NP2: Secondary nitrogen charging pipe

Claims (11)

In a ship including a membrane-type liquefied gas cargo hold and a cofferdam disposed at the front and rear of the cargo hold,
A cofferdam heating tower manufactured as an integrated tower structure including a heating pipe that receives heat medium and supplies heat to the interior of the cofferdam and a return pipe that discharges the heat medium supplied into the heating pipe; and
The cofferdam heating tower includes a finishing dome that closes the penetrating portion penetrating the upper hull structure of the cofferdam,
The return pipe is installed as an inner pipe inside the heating pipe, and the heating pipe extends into the interior of the cofferdam through the finishing dome,
A hole is formed at the lower end of the return pipe to communicate with the heating pipe,
Structure of the finishing part of a cofferdam heating tower. In claim 1,
The finishing dome is inserted in a sleeve type into the upper deck constituting the upper hull structure of the cofferdam and fixed by welding,
Structure of the finishing part of a cofferdam heating tower. In claim 2,
The finishing dome is characterized in that it is provided in the form of an end cap or a hemispherical roof having a '∩' cross-sectional shape,
Structure of the finishing part of a cofferdam heating tower. In claim 3,
In order to reinforce the structure of the finishing dome, a plurality of brackets are formed on the outer peripheral surface of the finishing dome and welded on the upper deck,
Structure of the finishing part of a cofferdam heating tower. delete In claim 1,
The cofferdam heating tower,
Further comprising a discharge pipe that suctions and discharges fluid collected in at least one of a bilge well and a sump well formed in the lower portion of the cofferdam,
Structure of the finishing part of a cofferdam heating tower. In claim 6,
The cofferdam heating tower,
an ejector installed on the discharge pipe to provide discharge pressure of the discharge pipe; and
Further comprising a driving pipe providing driving fluid to the ejector,
Structure of the finishing part of a cofferdam heating tower. In claim 7,
The discharge pipe and the driving pipe are arranged to penetrate the side of the finishing dome, and are bent downward inside the finishing dome to extend into the interior of the cofferdam,
Structure of the finishing part of a cofferdam heating tower. In claim 8,
The cofferdam heating tower,
Further comprising a nitrogen filling pipe for filling nitrogen gas into the insulating space formed in the cargo hold,
Structure of the finishing part of a cofferdam heating tower. In claim 9,
The nitrogen charging pipe is arranged to penetrate the side of the finishing dome, and is connected to the cargo hold from the upper part of the cofferdam and connected to a nitrogen charging line for charging nitrogen gas into the insulating space.
Structure of the finishing part of a cofferdam heating tower. In claim 10,
The nitrogen charging pipe is characterized in that it receives nitrogen from a nitrogen supply device provided inside the ship and delivers it to the nitrogen charging line.
Structure of the finishing part of a cofferdam heating tower.

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