JP2022047706A - Construction method of gas-liquid contact tower - Google Patents

Abstract

To provide a construction method of a gas-liquid contact tower which, in constructing an inner portion of the gas-liquid contact tower, can sufficiently increase work efficiency while keeping high safety.SOLUTION: There is provided a construction method of a gas-liquid contact tower 100 which treats a coke oven gas G1 and which comprises a filling material 50 in an inner portion thereof. The construction method of the gas-liquid contact tower 100 comprises: an opening step of disconnecting an overhead part of the gas-liquid contact tower 100 to open a tower main body part 110; and a construction step of constructing an inner portion of the tower main body part 110.SELECTED DRAWING: Figure 1

Description

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

Since the coke oven gas (COG) generated in the process of producing coke, which is an auxiliary raw material for iron making, contains impurities, various refining treatments such as desulfurization, deammonia, denaphthalin, and desalination are performed in the gas refining facility. Be given. For example, Patent Document 1 proposes a technique for desulfurizing coke oven gas using a precooling tower having a packed bed filled with a filler and a desulfurizing tower having a packed bed filled with a filler. .. In various towers where gas-liquid contact is performed using fillers in this way, solids adhere to the inside and deterioration of various members progresses over time, so periodic inspections, replacements, renewals, etc. are required. Work needs to be done. These operations are carried out by workers entering the inside from the inspection manhole provided in the tower.

JP-A-2015-229736

Since the coke oven gas is a flammable gas, appropriate safety measures such as wearing an air supply mask are required for work inside the gas-liquid contact tower. On the other hand, there is a limit to the size of the manhole provided on the side surface of the gas-liquid contact tower for carrying in and out the structure inside the tower. Therefore, it is necessary to disassemble and assemble the structure such as the support member of the filler and the liquid dispersion plate inside the gas-liquid contact tower. Work inside the gas-liquid contact tower is inefficient because it is difficult to secure a sufficient work space and it is necessary to ensure sufficient safety, and a lot of labor is required over a long period of time. Is needed.

Therefore, the present disclosure provides a method for constructing a gas-liquid contact tower that can sufficiently improve work efficiency while maintaining high safety when constructing the inside of the gas-liquid contact tower.

The present disclosure is a method of constructing a gas-liquid contact tower in which a coke oven gas is treated and a filler is provided inside. Provided is a construction method of a gas-liquid contact tower, which comprises a construction process for performing construction inside a portion.

In the above construction method, since the tower top of the gas-liquid contact tower is separated to open the tower body, an opening can be provided at the upper end of the tower body. Therefore, it is possible to secure the illuminance inside the tower main body and sufficiently ventilate the tower to improve the safety of the internal work. Further, it is possible to carry out and carry in the internal structure from the opening by using a lifting crane. As a result, the internal structure can be hung up in a large size, so that the work to be performed inside can be reduced and the carrying-out and carrying-in can be performed collectively. Therefore, the work efficiency can be sufficiently improved.

The tower top may be separated in the opening step by a fireless cutting method. This makes it possible to separate the top of the gas-liquid contact tower while maintaining high safety even before cleaning the inside of the gas-liquid contact tower. Then, since the internal cleaning work can be performed 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 opening step may be performed using at least one selected from the group consisting of a wire saw device, a saver saw device, and a hydraulic cutting device. This makes it possible to separate the top of the gas-liquid contact tower while maintaining high safety even before cleaning the inside of the gas-liquid contact tower. Although it is possible to perform the internal cleaning work before separating the tower top, the safety and efficiency of the cleaning work can be improved by performing the internal cleaning work after separating the tower top in this way. ..

In the above construction process, the assembly assembled outside the gas-liquid contact tower may be carried into the inside of the tower main body through an opening formed by separating the top of the tower and installed. This makes it possible to further improve work efficiency. Further, if the assembly is manufactured in advance, the construction period can be further shortened.

The above-mentioned construction method may have a restoration step of joining the tower top portion separated in the opening step to the upper end of the tower main body portion. As a result, it is possible to effectively utilize the members and reduce the cost associated with the construction.

In the restoration step, the position of the tower top and the tower body may be aligned by using the connecting member connecting the tower top and the tower body. This makes it possible to prevent the height of the tower top from changing before and after construction. Therefore, it is possible to smoothly restore incidental equipment such as ducts attached to the top of the tower.

Prior to the opening step, there may be a preparatory step of attaching a support member for supporting the duct connected to the top of the tower to the main body of the tower. This makes it possible to carry out the construction process without removing the duct from the tower body. Therefore, the work of removing and restoring the duct is reduced, and the work efficiency can be further improved.

In the construction process, at least one of the modification of the structure and the replacement of the filler inside the main body of the tower may be performed. When the internal structure is modified and / or the filler is replaced, the number of structures and / or fillers carried out from the tower body and carried into the tower body increases, and is provided in the tower body. The size of the members to be carried out and carried out tends to be larger than that of the inspection manhole. In the above construction method, since it is possible to carry out and carry in the structure and / or the filler through the opening formed at the upper end of the tower main body, the structure inside the tower main body is modified and / or The filler can be replaced smoothly.

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

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

Hereinafter, an embodiment of the present invention will be described with reference to the drawings as the case may be. However, the following embodiments are examples for explaining the present invention, and the present invention is not intended to be limited to the following contents. In the description, the same reference numerals are used for the same elements or elements having the same function, and duplicate description may be omitted in some cases. In addition, the positional relationship such as up, down, left, and right shall be based on the positional relationship shown in the drawings unless otherwise specified. Further, the dimensional ratio of each element is not limited to the ratio shown in the figure.

FIG. 1 is a diagram schematically showing an example of a gas-liquid contact tower to which the construction method of the gas-liquid contact tower according to the embodiment is applied. The gas-liquid contact tower 100 is provided with a filler 50, and is connected to a tower main body 110 that brings the coke oven gas G1 and the liquid into countercurrent contact, and a gas introduction that is connected to the lower part of the tower main body 110 to introduce the coke oven gas G1. The processing gas obtained by contacting the coke oven gas G1 and the liquid L1 connected to the pipe 10 and the liquid introduction pipe 42 connected to the side portion of the tower main body 110 to supply the liquid L1 and connected to the upper part of the tower main body 110. A duct 20 for deriving G2 is provided. A liquid outlet pipe 12 connected to the lower part of the tower main body 110 and leading out the processing liquid L2 obtained by contact between the coke oven gas G1 and the liquid L1 is provided. An exhaust pipe 30 for discharging the flammable gas G3 is connected to the top of the tower main body 110. The exhaust pipe 30 may be closed during normal operation. When the supply amount of the coke oven gas G1 is excessive, the combustible gas G3 is discharged from the exhaust pipe 30.

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

For example, a watering nozzle may be attached to the tip of the liquid introduction pipe 42, and the liquid L1 may be sprayed. In order to improve 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 an internal structure (internal structure). A support 52 for supporting the filler 50 and a tray 54 are provided. The filler 50 may be a wooden filler assembled in a grid pattern, and may be a plastic or metal filler. The tray 54 may be, for example, a liquid collecting plate or a liquid dispersion plate.

Solids that flow into the tower main body 110 along with the coke oven gas G1 and the liquid L1 adhere to the inner wall, the internal structure, and the filler 50 of the tower main body 110. In addition, corrosion of the inner wall, welded portion, and internal structure of the tower main body 110 progresses over time. Therefore, it is necessary to periodically clean and inspect the tower main body 110. In some cases, it may be repaired, replaced or modified. The construction inside the tower body in the present disclosure means that at least one of cleaning, inspection, repair, replacement and modification of the inside of the tower body is performed.

The construction method of the gas-liquid contact tower 100 is to separate the tower top of the gas-liquid contact tower 100 from the preparatory step of stopping the steady operation of the gas-liquid contact tower 100 and preparing to open the inside of the tower main body 110. It has an opening step of opening the tower main body 110, a construction step of performing the construction inside the tower main body 110, and a restoration step of joining the tower top separated by the opening step to the tower main body 110.

In the preparatory step, 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 scaffolding 70 for work is installed along the side surface of the tower main body 110. In FIG. 2, the scaffold 70 is a total scaffold, but the scaffold may be provided only in a necessary portion by using a staircase or the like provided on the outer periphery of the tower main body 110. A partition plate 25 is attached to each connection portion in order to cut the edges of the gas introduction pipe 10, the liquid outlet pipe 12, and the duct 20 from each of the tower main body 110. A partition plate 25 is also provided in 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 by the manhole. Although there is only one manhole cover 44 shown in FIGS. 1 and 2, a plurality of manholes may be provided at arbitrary positions. A support member 60 that supports the duct 20 is attached to the duct 20 connected to the tower top 112. The support member 60 supports the duct 20 by connecting the duct 20 and the tower main body 110 below the tower top 112.

In the opening step, as shown in FIG. 3, the exhaust pipe 30 is removed from the tower top 112 and suspended by a crane for removal. After that, the tower top 112 is separated and hung with a crane to remove it. By separating the tower top 112, the tower main body 110 is opened. As a result, ventilation inside the tower main body 110 to which combustibles are attached is promoted, and the illuminance inside can be ensured. Therefore, it is possible to improve the internal work efficiency while maintaining high safety.

The tower top 112 can be separated by cutting the tower main body 110 by a fireless cutting method. Safety can be further enhanced by using the non-fire cutting method. The fireless cutting method can be performed using, for example, a wire saw device, a saver saw device, a hydraulic cutting device, or the like. By using a wire saw device, cutting can be performed at low cost and in a short time. By using a saver saw device, cutting can be performed at a lower cost than the wire saw device. The hydraulic cutting device can cut horizontally in a short time. In addition, the cut surface is clean, and the portion scraped off by cutting can be reduced. Therefore, the height fluctuation of the tower top before cutting and after restoration can be sufficiently reduced.

When suspending the exhaust pipe 30 and the tower top 112 with a crane, a wire 77 connecting the crane to the exhaust pipe 30 and the tower top 112 is used. As shown in FIG. 4, the wire 77 may be attached to the piece member 75 welded to the top plate of the tower top 112. FIG. 4A is a side view of the piece member 75 welded to the tower top 112, and FIG. 4B is a front view of the piece member 75. Both are connected by inserting the wire 77 into 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 the piece member and a wire.

When the tower top 112 is separated and the inside is sufficiently ventilated, the construction process can be performed. In the construction process, a worker may enter the inside of the tower main body 110 to perform the work. For example, a worker enters the inside through an opening 80 formed at the upper end of the manhole 45 or the tower main body 110, and a part of the internal structure and the filler 50 in the tower main body 110 is disassembled or removed as necessary. Carry out from the manhole 45 or opening 80. The internal structure to be dismantled and carried out and the filler 50 are not particularly limited. In the present embodiment, the filler 50 shown in FIG. 3 is disassembled and carried out. Since the filler 50 can be smoothly miniaturized, it can be smoothly carried out from the manhole 45. If the amount of the filler 50 is large, it may be carried out from the opening 80. It is not essential to dismantle and carry out the internal structure and the filler 50 as in the present embodiment, and in another embodiment, dismantling and carrying out may not be performed, and only cleaning or inspection may be performed as internal work.

As shown in FIG. 5, after the filler 50 is carried out to secure a space, a support column 56 for reinforcing the support 52 and the tray 54 is installed. Then, the scaffolding 71 is installed inside the tower main body 110. The scaffolding material can be carried into the inside of the tower main body 110 from the manhole 45 or the opening 80. The internal scaffold 71 can be assembled on a support 52 reinforced by a support 56 and a bottom plate 55. The scaffolding 71 is used to clean the entire inside of the tower main body 110. Combustibles such as oil adhering to the inner wall and internal structure can be removed by cleaning. Cleaning may be performed by blasting such as sandblasting. After the oil is removed by cleaning, it becomes possible to use fire inside the tower main body 110.

After removing the internal structures such as the support 52 and the tray 54 and the ancillary equipment such as the liquid introduction pipe 42 from the tower main body 110 by the fire work, it is hung by a crane and removed as shown in FIG. .. Since the scaffold 71, the support 52, and the tray 54 installed inside can be carried out from the opening 80 by using a crane, the work efficiency can be significantly improved as compared with the case where the scaffold 71, the support 52, and the tray 54 are carried out from the opening 80 by being disassembled. It is not essential to carry out all the internal structures from the opening 80, and a part of the internal structure may be carried out from the manhole 45 depending on the size or weight of the scaffold 71, the internal structure and its disassembled body. In addition, it is not essential to remove all of the internal structures and ancillary equipment, and it is not necessary to remove part or all of them.

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

As shown in FIG. 7, in the construction method of this example, the internal structure is remodeled. There are more internal structures to be installed than to be removed, but the grating 57, liquid dispersion plate 59, etc. are assembled externally to form an assembly, and a crane is used inside the tower body 110. The assembly can be carried in and installed. Therefore, even if the number of internal structures increases, the work inside can be reduced and the work efficiency can be improved. Ancillary equipment such as the liquid introduction pipe 42 will also be installed using a crane. After installing all the internal structures, the scaffolding 71 is installed on the liquid dispersion plate 59 at the top, and the restoration process of joining the tower top 112 separated in the opening process to the upper end of the tower main body 110 is performed.

As shown in FIG. 8, the tower top 112 is suspended by a crane via a wire 77 and aligned directly above the opening 80 of the tower top 112. It is preferable that the tower top portion 112 is joined to the tower main body portion 110 so as to have the same height as before the separation. As a result, the connection between the tower top 112 and the duct 20 can be smoothly performed.

FIG. 9 is a diagram showing the vicinity of the joint portion 90A of the tower main body portion 110 and the tower top portion 112 which have been aligned and restored by using the connecting member 90. Since the tower top 112 and the tower main body 110 of the gas-liquid contact tower 100 are aligned and joined by using the connecting member 90, the height of the tower top 112 can be adjusted with high accuracy. Therefore, the height change of the tower top 112 before and after the separation can be sufficiently reduced.

FIG. 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 FIG. 10, a plurality of piece members 91 are welded to the side surface of the tower main body 110 so as to be arranged at predetermined intervals along the circumferential direction in the vicinity of the opening 80. A plurality of piece members 92 are also welded to the side surface of the tower top 112 so as to be arranged at predetermined intervals along the circumferential direction. The crane that suspends the tower top 112 is operated to adjust the position in the circumferential direction so that the piece member 91 of the tower top 112 and the piece member 92 of the tower main body 110 are aligned in the vertical direction. Subsequently, the crane that suspends the tower top 112 is operated to adjust the distance between the tower top 112 and the tower main body 110 in the vertical direction. After adjusting the position and spacing in the circumferential direction, the piece members 91 and the piece members 92 arranged in the vertical direction are connected via the plate-shaped variable piece hardware 93. In this way, the vertical direction and the circumferential direction of the tower top 112 and the tower main body 110 can be aligned.

A fixing member such as a bolt 94 and a nut 95 can be used to connect the variable piece hardware 93 and the piece member 91, and the variable piece hardware 93 and the piece member 92. Here, the length of the through hole 93a of the variable piece hardware 93 into which the bolt 94 is inserted may be longer than the length of the through holes 91a, 92a of the piece members 91, 92 along the vertical direction. As a result, fine adjustment of the vertical alignment between the tower top 112 and the tower main body 110 can be smoothly performed. Therefore, the root gap at the time of welding, which will be described later, can be smoothly adjusted. Further, even if the welding positions of the piece members 91 and 92 deviate and the distance between them fluctuates, it is possible to save the trouble of newly remaking the variable piece hardware 93. 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 the connecting member 90 including the variable piece hardware 93, piece members 91, 92, bolts 94 and nut 95, welding is performed to the tower top 112 and the tower body. Join the portions 110. FIG. 11 is an enlarged cross-sectional view showing the vicinity of the joint portion 90A when the tower top portion 112 and the tower main body portion 110 are joined by the welded portion 97. This cross-sectional view shows a cross section of the welded portion 97 and its vicinity when the tower top portion 112 and the tower main body portion 110 joined to each other by the welded portion 97 are cut along the vertical direction. Welding can be performed after the alignment of the tower top 112 and the tower main body 110 in the circumferential direction and the height direction is performed by using the connecting member 90. The welding may be, for example, arc welding. By using the connecting member 90 provided with the variable piece hardware 93, it is possible to smoothly adjust the root gap when arc welding the lower end of the tower top 112 and the upper end of the tower main body 110.

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

By joining the tower top 112 to the upper end of the tower body 110, the two are integrated. After joining, the exhaust pipe 30 is attached to the upper surface of the tower top 112. After that, a welding inspection and an airtightness test may be performed as necessary. The scaffolding 71 inside the tower main body 110 is disassembled and carried out from the manhole 45. Further, as shown in FIG. 13, the filler 51 is carried into the inside of the tower main body 110 from the manhole 45 and arranged on the grating 57. The filler 51 may be carried in before the tower top 112 and the tower main body 110 are joined. When all the fillers 51 have been brought in, the manhole 45 is closed with the lid 44. Airtightness inspection and exterior painting may be performed as necessary.

After removing the gas introduction pipe 10, the liquid outlet pipe 12, the connection portion between the duct 20 and the tower main body 110, and the partition plate 25 attached to the exhaust pipe 30, an inert gas such as nitrogen gas is introduced. , Purge the tower body 110 and the inside of each pipe. In this way, the modified gas-liquid contact tower 100A can be operated.

FIG. 14 is a diagram schematically showing a gas-liquid contact tower 100A at the start (restart) of operation. As can be seen by comparing FIGS. 1 and 14, in the gas-liquid contact tower 100, the internal structure and the filler are replaced, and the number of the liquid introduction pipes 42 is also changed. When modifying the internal structure and ancillary equipment in this way, or when replacing the filler, the series of operations of removal, disassembly, unloading, assembly, loading and installation becomes complicated and the amount of work increases. .. According to the above construction method, since the structure can be carried in and out by the opening 80 formed at the upper end of the tower main body 110, the structure is modified and the filler inside the tower main body 110. Can be exchanged smoothly.

The gas-liquid contact tower 100A is provided with a filler 51, and is a gas that is connected to a tower main body 110 that brings the coke oven gas G1 and the liquid into countercurrent contact and is connected to the lower part of the tower main body 110 to introduce the coke furnace gas G1. A process obtained by contacting the introduction pipe 10, the liquid introduction pipe 42 connected to the side of the tower main body 110 and supplying the liquid L1, and the coke oven gas G1 and the liquid L1 connected to the upper part of the tower main body 110. It includes a duct 20 for leading out the gas G2, and a liquid leading out pipe 12 connected to the lower part of the tower main body 110 and leading out the processing liquid L2 obtained by contacting the coke oven gas G1 and the liquid L1. An exhaust pipe 30 for discharging flammable gas is connected to the top of the tower main body 110. The exhaust pipe 30 may be closed during normal operation.

The support member 60 attached to support the duct 20 in the preparatory step may be removed before restarting the operation, or may remain attached after the restart. FIG. 15 is a cross-sectional view showing an example of a support structure of the duct 20 by the support member 60. FIG. 15 shows a cross section when the connection portion between the support member 60 and the duct 20 is cut along the horizontal direction. The support member 60 includes a frame body portion 62 provided so as to surround the duct 20, a connecting portion 63 connecting the frame body portion 62 and the duct 20, and a connecting portion 64 connecting the frame body portion 62 to the tower main body portion 110. And. 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 connected to the top of the gas-liquid contact column 100 and for extracting the processing gas has a relatively large size. By using the support member 60 that supports the duct 20, the gas-liquid contact tower 100 can be constructed with higher safety. Further, 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 re-install the support member 60. The structure of the support member is not limited to that of FIG. 15, and a structure capable of supporting the duct 20 can be appropriately used. When the top of the gas-liquid contact tower 100A is separated and opened, the top of the gas-liquid contact tower 100A may be cut at a position different from the joint between the top of the tower and the main body of the tower to separate the top of the tower.

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 is remodeled into a gas-liquid contact tower 100A having an internal structure and a filler different from that of the gas-liquid contact tower 100, but the remodeling 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 are joined to restore the gas-liquid contact tower 100 having the same internal structure and filler. You may. The cutting position of the tower top in the opening step is not limited to the lower side than the connection position between the duct 20 and the tower top 112. If there is sufficient height above the connection position between the duct 20 and the tower top 112, the tower top 112 may be separated 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 high safety when constructing the inside of the gas-liquid contact tower. ..

10 ... gas introduction pipe, 12 ... liquid outlet pipe, 20 ... duct, 25 ... partition plate, 30 ... exhaust pipe, 42 ... liquid introduction pipe, 44 ... lid, 45 ... manhole, 50, 51 ... filler, 52 ... support Body, 54 ... Tray, 55 ... Bottom plate, 56 ... Support, 57 ... Grating, 58 ... Beam member, 59 ... Liquid dispersion plate, 60 ... Support member, 62 ... Frame body part, 63 ... Connection part, 64 ... Connection part, 70, 71 ... scaffold, 75, 91, 92 ... piece 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 ... welded part, 100, 100A ... gas-liquid contact tower, 110 ... tower body, 112 ... tower top, G1 ... coke furnace gas, G2 ... processing gas , G3 ... flammable gas, L1 ... liquid, L2 ... treatment liquid.

Claims (8)

It is a construction method of a gas-liquid contact tower that processes coke oven gas and has a filler inside.
The opening process of separating the top of the gas-liquid contact tower and opening the main body of the tower,
A method for constructing a gas-liquid contact tower, comprising a construction process for constructing the inside of the tower body. The method for constructing a gas-liquid contact tower according to claim 1, wherein the top of the tower is separated in the opening step by a fireless cutting method. The gas-liquid contact tower according to claim 1 or 2, wherein the separation of the tower top in the opening step is performed using at least one selected from the group consisting of a wire saw device, a saver saw device, and a hydraulic cutting device. Construction method. In the construction step, any of claims 1 to 3, wherein the assembly assembled outside the gas-liquid contact tower is carried into the inside of the tower main body through an opening formed by separating the top of the tower. The construction method of the gas-liquid contact tower described in item 1. The method for constructing a gas-liquid contact tower according to any one of claims 1 to 4, further comprising a restoration step of joining the tower top portion separated in the opening step to the upper end of the tower main body portion. The construction of the gas-liquid contact tower according to claim 5, wherein in the restoration step, the position of the tower top and the tower body is aligned by using a connecting member connecting the tower top and the tower body. Method. The gas-liquid contact tower according to any one of claims 1 to 6, further comprising a preparatory step of attaching a support member for supporting a duct connected to the top of the tower to the main body of the tower before the opening step. Construction method. The method for constructing a gas-liquid contact tower according to any one of claims 1 to 7, wherein in the construction step, at least one of the modification of the structure inside the tower body and the replacement of the filler is performed.

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