JP7538407B2 - Gas-liquid contactor construction method - Google Patents

Description

This disclosure relates to a method for constructing a gas-liquid contact tower.

Coke oven gas (COG) generated in the process of producing coke, a secondary raw material for steelmaking, contains impurities, so it is subjected to various refining processes such as desulfurization, ammonia removal, naphthalene removal, and diesel removal in gas refining facilities. For example, Patent Document 1 proposes a technology for desulfurizing coke oven gas using a pre-cooling tower with a packed bed filled with packing material, and a desulfurization tower with a packed bed filled with packing material. In various towers that use packing material to perform gas-liquid contact in this way, solid matter adheres to the inside over time and various components deteriorate, so regular inspection, replacement, renewal, and other work is required. These work is carried out by workers entering the tower through an inspection manhole installed in the tower.

JP 2015-229736 A

Because coke oven gas is flammable, appropriate safety measures, such as wearing an air supply mask, are required when working inside a gas-liquid contact tower. On the other hand, there are restrictions on the size of the manholes on the sides of the gas-liquid contact towers through which the structures inside the towers are carried in and out. For this reason, dismantling and assembly work for structures such as the packing support members and liquid distribution plates must be carried out inside the gas-liquid contact tower. Work inside a gas-liquid contact tower is inefficient because it is difficult to secure sufficient working space, and it is necessary to ensure sufficient safety while working inside the tower, and it requires a lot of labor over a long period of time.

Therefore, this disclosure provides a method for constructing a gas-liquid contactor that can sufficiently improve work efficiency while maintaining a high level of safety when carrying out construction inside the gas-liquid contactor.

The present disclosure provides a method for constructing a gas-liquid contact tower that processes coke oven gas and has a packing material inside, the method including an opening step for detaching the top of the gas-liquid contact tower to open the tower body, and a construction step for carrying out construction inside the tower body.

In the above construction method, the top of the gas-liquid contact tower is separated to open the tower body, so an opening can be provided at the top end of the tower body. This ensures sufficient illuminance inside the tower body and provides sufficient ventilation, improving the safety of internal work. In addition, the opening makes it possible to use a lifting crane to transport internal structures in and out. This allows the internal structures to be lifted out while still in their large size, reducing the amount of work to be done inside and enabling transport in and out to be done together. This can therefore significantly improve work efficiency.

The separation of the tower top in the above-mentioned opening process may be performed using a fireless cutting method. This allows the tower top to be separated while maintaining a high level of safety even before cleaning work is performed inside the gas-liquid contact tower. Furthermore, since it is possible to perform internal cleaning work after the tower top is separated, the safety and efficiency of the cleaning work can be improved.

The separation of the tower top in the above-mentioned opening step may be performed using at least one selected from the group consisting of a wire saw device, a saber saw device, and a hydraulic cutting device. This allows the tower top to be separated while maintaining a high level of safety even before the interior cleaning work of the gas-liquid contact tower is performed. Although it is possible to perform the interior cleaning work before separating the tower top, performing the interior cleaning work after separating the tower top in this way can increase the safety and efficiency of the cleaning work.

In the above construction process, the assembly assembled outside the gas-liquid contact tower may be carried into the tower body through an opening formed by cutting off the tower top, and then installed. This can further improve work efficiency. Also, if the assembly is manufactured in advance, the construction period can be further shortened.

The above-mentioned construction method may include a restoration process in which the tower top, which was separated in the opening process, is joined to the upper end of the tower body. This makes it possible to effectively use materials and reduce construction costs.

In the restoration process, the tower top and tower body may be aligned using a connecting member that connects the two. This prevents the height of the tower top from changing before and after construction. This allows the restoration of ancillary equipment such as ducts attached to the tower top to be carried out smoothly.

Before the above-mentioned opening step, a preparation step may be included in which a support member for supporting the duct connected to the tower top is attached to the tower body. This makes it possible to carry out the construction step without removing the duct from the tower body. This reduces the work of removing and restoring the duct, further improving work efficiency.

In the above construction process, at least one of modifying the structure inside the tower body and replacing the filler material may be performed. When modifying the internal structure and/or replacing the filler material, the amount of structures and/or filler material to be transported out of and into the tower body increases, and the size of the parts to be transported out and in tends to be larger than the inspection manhole provided in the tower body. In the above construction method, the structure and/or filler material can be transported out and in through the opening formed at the top end of the tower body, so that the modification of the structure inside the tower body and/or replacement of the filler material can be performed smoothly.

It is possible to provide a method for constructing the inside of a gas-liquid contact tower that can sufficiently improve work efficiency while maintaining a high level of safety.

FIG. 1 is a schematic diagram of a gas-liquid contactor to which a construction method according to an embodiment of the present invention is applied. FIG. 2 is a diagram for explaining a preparation process of the construction method according to one embodiment. FIG. 3 is a diagram for explaining the opening step of the construction method according to one embodiment. 4(A) and 4(B) are diagrams showing an example of a method for connecting a lifting wire to the top of a tower. FIG. 5 is a diagram for explaining the construction process of the construction method according to one embodiment. FIG. 6 is a diagram for explaining the construction process of the construction method according to one embodiment. FIG. 7 is a diagram for explaining the construction process of the construction method according to one embodiment. FIG. 8 is a diagram for explaining a restoration process of a construction method according to one embodiment. FIG. 9 is a diagram showing the vicinity of the joint between the tower body and the tower top restored in the restoration process of the construction method according to one embodiment. FIG. 10 is a diagram showing a method of aligning the tower body and the tower top in the restoration process of the construction method according to one embodiment. FIG. 11 is an enlarged cross-sectional view showing the vicinity of the joint after the tower top and tower body are joined by a welded portion in the restoration process of the construction method according to one embodiment. FIG. 12 is a cross-sectional view showing an example of a joint between the tower top and the tower body. FIG. 13 is a diagram for explaining the work content after joining the tower top and the tower body in the restoration process of the construction method according to one embodiment. FIG. 14 is a diagram illustrating a gas-liquid contactor at the start (restart) of operation after a construction method according to one embodiment has been applied. FIG. 15 is a cross-sectional view showing an example of a support structure for a duct using a support member.

One embodiment of the present invention will be described below, with reference to the drawings where appropriate. However, the following embodiment is merely an example for explaining the present invention, and is not intended to limit the present invention to the following content. In the description, the same reference numerals will be used for the same elements or elements having the same functions, and duplicated descriptions will be omitted where appropriate. Furthermore, unless otherwise specified, positional relationships such as up, down, left, and right will be based on the positional relationships shown in the drawings. Furthermore, the dimensional ratios of each element are not limited to those shown in the drawings.

Figure 1 is a schematic diagram showing an example of a gas-liquid contact tower to which a construction method for a gas-liquid contact tower according to an embodiment of the present invention is applied. The gas-liquid contact tower 100 includes a tower body 110 provided with a packing material 50 and for countercurrently contacting a coke oven gas G1 with a liquid, a gas inlet pipe 10 connected to the lower part of the tower body 110 for introducing the coke oven gas G1, a liquid inlet pipe 42 connected to the side of the tower body 110 for supplying the liquid L1, and a duct 20 connected to the upper part of the tower body 110 for discharging a treated gas G2 obtained by contacting the coke oven gas G1 with the liquid L1. The tower body 110 includes a liquid outlet pipe 12 connected to the lower part of the tower body 110 for discharging a treated liquid L2 obtained by contacting the coke oven gas G1 with the liquid L1. An exhaust pipe 30 for discharging a flammable gas G3 is connected to the top of the tower body 110. The exhaust pipe 30 may be closed during normal operation. In cases such as when there is an excess supply of coke oven gas G1, combustible gas G3 is discharged from the exhaust pipe 30.

The gas-liquid contact tower 100 may be, for example, a desulfurization tower in a gas refining facility for coke oven gas, or may be a pre-cooling tower (direct cooler) provided upstream of the desulfurization tower in the gas refining facility, a benzol scrubber, an ammonia scrubber, a naphthalene scrubber, or a cooling tower (final cooler) provided downstream of the desulfurization tower. In the case of a desulfurization tower, an absorption liquid such as an amine may be used as the liquid L1 to absorb the sulfides contained in the coke oven gas G1. In the case of a pre-cooling tower or a naphthalene scrubber, water containing tar and ammonia may be used as the liquid L1 to absorb the naphthalene contained in the coke oven gas G1. The gas-liquid contact tower 100 may discharge, for example, a liquid containing sulfides or naphthalene as the treated liquid L2 from the liquid discharge pipe 12. The treated liquid L2 may be regenerated in a separately provided regeneration tower and recycled. The treated gas G2 obtained in the precooling tower, benzene scrubber, or naphthalene scrubber may be introduced into the desulfurization tower as coke oven gas G1.

For example, a water spray nozzle may be attached to the tip of the liquid introduction pipe 42, and liquid L1 may be sprayed. In order to increase the contact efficiency between the liquid L1 introduced from the liquid introduction pipe 42 and the coke oven gas G1 introduced from the gas introduction pipe 10, the tower main body 110 is provided with a support 52 for supporting the packing material 50 and a tray 54 as an internal structure (internal structure). The packing material 50 may be a wooden packing material arranged in a lattice shape, or may be a plastic or metal packing material. The tray 54 may be, for example, a liquid collection plate or a liquid distribution plate.

Solids that flow into the tower body 110 along with the coke oven gas G1 and liquid L1 adhere to the inner walls, internal structures, and packing material 50 of the tower body 110. In addition, corrosion of the inner walls, welds, and internal structures of the tower body 110 progresses over time. For this reason, it is necessary to periodically clean and inspect the tower body 110. In some cases, repairs, replacement, or modifications may also be required. In this disclosure, construction of the inside of the tower body means performing at least one of cleaning, inspection, repair, replacement, and modification of the inside of the tower body.

The construction method of the gas-liquid contact tower 100 includes a preparation process in which the normal operation of the gas-liquid contact tower 100 is stopped and preparations are made to open the inside of the tower body 110, an opening process in which the top of the gas-liquid contact tower 100 is cut off to open the tower body 110, a construction process in which construction is performed inside the tower body 110, and a restoration process in which the top of the tower cut off in the opening process is joined to the tower body 110.

In the preparation process, the supply of the coke oven gas G1 and the liquid L1 to the gas-liquid contact tower 100 is stopped, and the residual liquid remaining inside the tower main body 110 is discharged. The inside of the tower main body 110 may be steam-cleaned. After that, as shown in FIG. 2, a work scaffold 70 is installed along the side of the tower main body 110. In FIG. 2, the scaffold 70 is a full scaffold, but it may be installed only in necessary parts using stairs or the like installed on the outer periphery of the tower main body 110. In order to separate the gas inlet pipe 10, the liquid outlet pipe 12, and the duct 20 from the tower main body 110, a partition plate 25 is attached to each connection part. A partition plate 25 is also installed on the exhaust pipe 30 to prevent backflow of flammable gas. The manhole cover 44 is removed and the inside of the tower main body 110 is ventilated through the manhole. Note that although only one manhole cover 44 is shown in FIGS. 1 and 2, multiple manholes may be installed at any position. A support member 60 that supports the duct 20 is attached to the duct 20 that is connected to the tower top 112. The support member 60 connects the duct 20 to the tower body 110 below the tower top 112 and supports the duct 20.

In the opening process, as shown in FIG. 3, the exhaust pipe 30 is removed from the tower top 112 and lifted and removed by a crane. The tower top 112 is then detached and lifted and removed by a crane. The tower main body 110 is opened by detaching the tower top 112. This promotes ventilation inside the tower main body 110 where combustible materials are attached, and ensures the illumination inside. Therefore, it is possible to improve the efficiency of work inside while maintaining a high level of safety.

The tower top 112 can be separated by cutting the tower body 110 using a fireless cutting method. Using a fireless cutting method can further increase safety. The fireless cutting method can be performed using, for example, a wire saw device, a saber saw device, or a hydraulic cutting device. By using a wire saw device, cutting can be performed at low cost and in a short time. By using a saber saw device, cutting can be performed at an even lower cost than with a wire saw device. A hydraulic cutting device can cut horizontally in a short time. In addition, the cut surface is clean, and the part that is scraped off during cutting can be made small. Therefore, the height change of the tower top before cutting and after restoration can be sufficiently small.

When suspending the exhaust pipe 30 and tower top 112 with a crane, a wire 77 is used to connect the crane to the exhaust pipe 30 and tower top 112. As shown in FIG. 4, the wire 77 may be attached to a piece member 75 welded to the top plate of the tower top 112. FIG. 4(A) is a side view of the piece member 75 welded to the tower top 112, and FIG. 4(B) is a front view of the piece member 75. The two are connected by inserting the wire 77 through the through hole 75a of the piece member 75. A similar piece member is welded to the exhaust pipe 30, and the exhaust pipe 30 may be suspended by connecting this piece member to a wire.

Once the tower top 112 has been separated and the interior has been sufficiently ventilated, the construction process can be carried out. In the construction process, workers may enter the tower body 110 to carry out work. For example, a worker enters the tower body 110 through the manhole 45 or the opening 80 formed at the top end of the tower body 110, dismantles or removes a part of the internal structure and the filler 50 in the tower body 110 as necessary, and carries them out through the manhole 45 or the opening 80. The internal structure and the filler 50 to be dismantled and carried out are not particularly limited. In this embodiment, the filler 50 shown in FIG. 3 is dismantled and carried out. Since the filler 50 can be smoothly downsized, it can be smoothly carried out from the manhole 45. If the amount of the filler 50 is large, it may be carried out through the opening 80. It is not essential to dismantle and carry out the internal structure and the filler 50 as in this embodiment, and in another embodiment, only cleaning or inspection may be performed as the internal work without dismantling and carrying out.

As shown in FIG. 5, after removing the filler 50 to secure space, the support 52 and the support columns 56 that reinforce the tray 54 are installed. Then, the scaffolding 71 is installed inside the tower body 110. The scaffolding can be brought into the tower body 110 through the manhole 45 or the opening 80. The internal scaffolding 71 can be assembled on the support 52 reinforced by the support columns 56 and on the bottom plate 55. The scaffolding 71 is used to clean the entire inside of the tower body 110. Combustible materials such as oil adhering to the inner walls and internal structures can be removed by cleaning. Cleaning may be performed by blasting, such as sandblasting. After the oil is removed by cleaning, it is possible to use fire inside the tower body 110.

After removing the internal structures such as the supports 52 and trays 54, and the associated equipment such as the liquid introduction pipes 42 from the tower body 110 by fireworks, they are lifted and removed by a crane as shown in FIG. 6. The scaffolding 71, supports 52, and trays 54 installed inside can be removed from the opening 80 using a crane, which can significantly improve work efficiency compared to dismantling and removing them from the manhole 45. It is not necessary to remove all of the internal structures from the opening 80, and some may be removed from the manhole 45 depending on the size or weight of the scaffolding 71, internal structures, and the dismantled items. It is also not necessary to remove all of the internal structures and associated equipment, and some or all of them may not be removed.

After removal is complete, a replacement internal structure is installed. The internal structure to be installed may be a cleaned version of the removed structure, or may be a replacement or modified product. In this example, as shown in FIG. 7, seven gratings 57 and two liquid distribution plates 59 (distributors) are installed inside the tower body 110. Each grating 57 and each liquid distribution plate 59 is supported by a beam member 58. Each grating 57 and each liquid distribution plate 59, as well as the beam member 58 that supports them, are installed from below using scaffolding. The upper beam member 58 and grating 57 or liquid distribution plate 59 may be installed using the lower beam member 58 and grating 57 or liquid distribution plate 59 as scaffolding.

As shown in Figure 7, in this example of the construction method, the internal structures are modified. There are more internal structures to be installed than to be removed, but the grating 57, liquid distribution plate 59, etc. can be assembled externally to form an assembly, and the assembly can be transported and installed inside the tower body 110 using a crane. Therefore, even if the number of internal structures increases, the amount of work inside can be reduced, improving work efficiency. Ancillary equipment such as the liquid introduction pipe 42 is also installed using a crane. Once all the internal structures are installed, scaffolding 71 is placed on the top liquid distribution plate 59, and the restoration process is performed in which the tower top 112, which was separated in the opening process, is joined to the top end of the tower body 110.

As shown in FIG. 8, the tower top 112 is suspended by a crane via wire 77 and positioned directly above the opening 80 of the tower top 112. The tower top 112 is preferably joined to the tower body 110 so that it is at the same height as before it was separated. This allows the tower top 112 to be smoothly connected to the duct 20.

Figure 9 is a diagram showing the vicinity of the joint 90A of the tower body 110 and tower top 112, which have been restored by aligning them using the connecting member 90. The tower top 112 and tower body 110 of the gas-liquid contact tower 100 are joined by aligning them using the connecting member 90, so the height of the tower top 112 can be adjusted with high precision. This allows the change in height of the tower top 112 before and after separation to be sufficiently small.

Figure 10 is a diagram showing a method of aligning the tower top 112 and the tower main body 110 in the restoration process. As shown in Figure 10, a plurality of piece members 91 are welded to the side of the tower main body 110 near the opening 80 so as to be aligned at a predetermined interval along the circumferential direction. A plurality of piece members 92 are also welded to the side of the tower top 112 so as to be aligned at a predetermined interval along the circumferential direction. The crane that suspends the tower top 112 is operated to adjust the circumferential position so that the piece member 91 of the tower top 112 and the piece member 92 of the tower main body 110 are aligned vertically. Next, the crane that suspends the tower top 112 is operated to adjust the vertical distance between the tower top 112 and the tower main body 110. After adjusting the circumferential position and distance, the piece members 91 and 92 aligned vertically are connected via a plate-shaped variable piece hardware 93. In this way, the tower top 112 and tower body 110 can be aligned vertically and circumferentially.

The variable piece hardware 93 and the piece member 91, and the variable piece hardware 93 and the piece member 92 can be connected using fixing members such as bolts 94 and nuts 95. Here, the length along the vertical direction of the through hole 93a of the variable piece hardware 93 through which the bolt 94 is inserted may be longer than the length along the vertical direction of the through holes 91a and 92a of the piece members 91 and 92. This allows for smooth fine adjustment of the vertical alignment of the tower top 112 and the tower body 110. Therefore, the adjustment of the root gap during welding, which will be described later, can also be smoothly performed. In addition, even if the welding positions of the piece members 91 and 92 are shifted and the distance between them changes, the effort of remaking the variable piece hardware 93 can be saved. In this way, the versatility of the variable piece hardware 93 can be improved.

After aligning the tower top 112 and the tower body 110 using a connecting member 90 including a variable piece hardware 93, piece members 91, 92, bolts 94, and nuts 95, the tower top 112 and the tower body 110 are joined by welding. FIG. 11 is an enlarged cross-sectional view showing the vicinity of the joint 90A when the tower top 112 and the tower body 110 are joined by the welded portion 97. This cross-sectional view shows the welded portion 97 and a cross-section of its vicinity when the tower top 112 and the tower body 110 joined to each other by the welded portion 97 are cut along the vertical direction. Welding can be performed after aligning the tower top 112 and the tower body 110 in the circumferential and vertical directions using the connecting member 90. The welding may be, for example, arc welding. By using a connection member 90 equipped with a variable piece hardware 93, the root gap can be smoothly adjusted when arc welding the lower end of the tower top 112 and the upper end of the tower body 110.

When welding the tower top 112 and the tower body 110, the band material 82 may be used for seal welding as shown in FIG. 12. Specifically, the band material 82 is attached so as to cover the joint 90A from the inside along the inner walls of the tower body 110 and the tower top 112. The band material 82 is fixed to the inner walls of the tower body 110 and the tower top 112 at welds 98 at both ends. Then, welding is performed from the outside of the tower body 110 and the tower top 112 to provide the welds 97. This allows the height of the tower top 112 to be smoothly adjusted to the same height as before separation, even if the portion scraped off when the tower top 112 is separated becomes large. For example, the band material 82 may be used when the vertical length of the portion scraped off is 10 mm or more.

The tower top 112 is joined to the upper end of the tower body 110 to form a single unit. After joining, an exhaust pipe 30 is attached to the top surface of the tower top 112. Thereafter, welding inspection and airtightness testing may be performed as necessary. The scaffolding 71 inside the tower body 110 is dismantled and removed through the manhole 45. Also, as shown in FIG. 13, the filler material 51 is carried into the tower body 110 through the manhole 45 and placed on the grating 57. The filler material 51 may be carried in before joining the tower top 112 and the tower body 110. After all the filler material 51 has been carried in, the manhole 45 is closed with the lid 44. Airtightness testing and exterior painting may be performed as necessary.

After removing the gas inlet pipe 10, the liquid outlet pipe 12, the connection between the duct 20 and the tower body 110, and the partition plate 25 attached to the exhaust pipe 30, an inert gas such as nitrogen gas is introduced to purge the tower body 110 and each pipe. In this way, the modified gas-liquid contact tower 100A is ready for operation.

Figure 14 is a schematic diagram of the gas-liquid contact tower 100A at the start (restart) of operation. As can be seen by comparing Figures 1 and 14, the internal structure and packing material of the gas-liquid contact tower 100 have been replaced, and the number of liquid introduction pipes 42 has also been changed. When modifying the internal structure and auxiliary equipment or replacing the packing material in this way, the series of operations of removal, dismantling, carrying out, assembling, carrying in, and installing become more complicated and the amount of work increases. According to the above construction method, the structure can be carried in and out through the opening 80 formed at the upper end of the tower body 110, so that the modification of the structure inside the tower body 110 and the replacement of the packing material can be performed smoothly.

The gas-liquid contact tower 100A is provided with a packing material 51, and is equipped with a tower body 110 that brings the coke oven gas G1 and the liquid into countercurrent contact, a gas inlet pipe 10 connected to the lower part of the tower body 110 and introducing the coke oven gas G1, a liquid inlet pipe 42 connected to the side of the tower body 110 and supplying the liquid L1, a duct 20 connected to the upper part of the tower body 110 and discharging the treated gas G2 obtained by contacting the coke oven gas G1 and the liquid L1, and a liquid discharge pipe 12 connected to the lower part of the tower body 110 and discharging the treated liquid L2 obtained by contacting the coke oven gas G1 and the liquid L1. An exhaust pipe 30 that discharges flammable gas is connected to the top of the tower body 110. The exhaust pipe 30 may be closed during normal operation.

The support member 60 attached to support the duct 20 in the preparation process may be removed before restarting operation, or may remain attached after restarting operation. FIG. 15 is a cross-sectional view showing an example of a support structure for the duct 20 using the support member 60. FIG. 15 shows a cross-section of the connection between the support member 60 and the duct 20 cut horizontally. The support member 60 includes a frame portion 62 that is provided to surround the duct 20, a connection portion 63 that connects the frame portion 62 and the duct 20, and a connecting portion 64 that connects the frame portion 62 to the tower main body portion 110. One end of the connecting portion 64 is fixed to the outer wall of the tower main body portion 110 by welding. One end of the connecting portion 63 is welded to the outer wall of the duct 20, and the other end is welded to the frame portion 62.

The duct 20, which is connected to the top of the gas-liquid contact tower 100 and extracts the treated gas, has a relatively large size. By using the support member 60 that supports the duct 20, the construction method of the gas-liquid contact tower 100 can be performed with even higher safety. In addition, the gas-liquid contact tower 100A can be operated with the support member 60 attached. Therefore, when the top of the gas-liquid contact tower 100A is separated and opened, it is not necessary to install the support member 60 again. The structure of the support member is not limited to that shown in FIG. 15, and any structure capable of supporting the duct 20 can be used as appropriate. When the top of the gas-liquid contact tower 100A is separated and opened, the top of the tower may be separated by cutting at a position different from the joint between the top of the tower and the tower main body.

Although one embodiment of the present disclosure has been described above, the present disclosure is not limited to the above embodiment. For example, in the above example, the gas-liquid contact tower 100 was modified to a gas-liquid contact tower 100A having an internal structure and packing material different from those of the gas-liquid contact tower 100, but modification is not essential. After cleaning and inspecting the inside of the tower body 110 of the gas-liquid contact tower 100, the tower top 112 and the tower body 110 may be joined to restore the gas-liquid contact tower 100 having the same internal structure and packing material. The cutting position of the tower top in the opening process is not limited to below the connection position between the duct 20 and the tower top 112. If there is a sufficient height above the connection position between the duct 20 and the tower top 112, the tower top 112 may be cut off above the duct 20.

According to the present disclosure, it is possible to provide a method for constructing a gas-liquid contact tower that can sufficiently improve work efficiency while maintaining a high level of safety when carrying out construction inside the gas-liquid contact tower.

10...gas inlet pipe, 12...liquid outlet pipe, 20...duct, 25...partition plate, 30...exhaust pipe, 42...liquid inlet pipe, 44...lid, 45...manhole, 50, 51...filler, 52...support, 54...tray, 55...bottom plate, 56...support, 57...grating, 58...beam member, 59...liquid distribution plate, 60...support member, 62...frame body portion, 63...connection portion, 64...connecting portion, 70, 71...scaffolding, 75, 91, 92...piston Base member, 75a, 91a, 92a, 93a...through hole, 77...wire, 80...opening, 82...band material, 90...connecting member, 90A...joint, 93...variable piece hardware, 94...bolt, 95...nut, 97, 98...weld, 100, 100A...gas-liquid contact tower, 110...tower body, 112...tower top, G1...coke oven gas, G2...processing gas, G3...flammable gas, L1...liquid, L2...processing liquid.

Claims (6)

A method for constructing a gas-liquid contactor that processes coke oven gas and has a packing material therein, comprising the steps of:
a preparation step of attaching a support member for supporting a duct connected to a top portion of the gas-liquid contactor to a tower body portion of the gas-liquid contactor;
an opening step of separating the tower top to open the tower main body;
A construction process for carrying out construction inside the tower body;
and a restoration step of joining the tower top portion separated in the opening step to an upper end of the tower main body portion . The method for constructing a gas-liquid contactor according to claim 1, wherein the separation of the tower top in the opening step is performed by a fireless cutting method. 3. The method for constructing a gas-liquid contactor according to claim 1 or 2, wherein the separation of the tower top in the opening step is carried out using at least one selected from the group consisting of a wire saw device, a saber saw device, and a hydraulic cutting device. The construction method for a gas-liquid contact tower according to any one of claims 1 to 3, wherein in the construction step, an assembly assembled outside the gas-liquid contact tower is carried into the tower body through an opening formed by cutting off the tower top and installed therein. The construction method for a gas-liquid contactor according to any one of claims 1 to 4 , wherein in the restoration step, the tower top and the tower main body are aligned using a connecting member that connects the tower top and the tower main body. The method for constructing a gas-liquid contactor according to any one of claims 1 to 5 , wherein in the construction step, at least one of remodeling an internal structure of the tower body and replacing the packing is carried out.

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