Turbine main body equipment replacement method and main body surrounding piping assembly device

Abstract

To shorten a power generation stop period regarding renewal work for a turbine body device.SOLUTION: According to the embodiment, a method for replacing a turbine body device at a power plant comprises: an existing removal step S31 of removing an existing turbine body device and an existing pipe to be removed around the turbine body device; a body device installation step S32 of installing a new turbine body device; a step S33 for carrying in a pipe around the body device in which a pipe around the body device is carried in to a position where the pipe around the body device to be newly installed in place of the existing pipe to be removed is connected to a new body device and an existing pipe to be connected; a pipe connection step S34 of connecting the pipe around the body device to the new turbine body device, and connecting the pipe around the body device to the existing pipe to be connected; and a factory step S20 of performing the manufacturing and assembly (centering, welding) of the pipe around the body device in a factory.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] An embodiment of the present invention relates to a turbine main body equipment replacement method and a main body equipment surrounding piping assembly device. [Background technology]

[0002] The renewal of equipment at power plants is also important in terms of preventive maintenance, etc. On the other hand, when the renewal of equipment requires the operation of the power plant to be stopped, it is desirable for the power generation company to shorten the period during which power generation is stopped due to the renewal as much as possible.

[0003] In particular, in turbine renewal work, generally, all processes such as removal of existing equipment, turbine installation, welding of piping around the turbine, and fastening of the piping to existing equipment are carried out and completed within the power plant. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6740167 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventional construction methods require that power generation be stopped during turbine renewal work. In previous turbine renewal work, all work was generally carried out within the power plant, and installation and pipe welding work were carried out while avoiding interference with surrounding equipment, but since this could not be simplified, it was difficult to stop power generation and shorten the construction process.

[0006] In particular, when upgrading combined cycle gas turbines, there is a problem that the piping work around the gas turbine is complicated due to the large amount of related equipment and piping, which further lengthens the construction process.

[0007] An object of the present invention is to provide a new turbine main body replacement method and main body surrounding piping assembly device that shortens the period during which power generation is stopped in relation to turbine main body renewal work. [Means for solving the problem]

[0008] The turbine main body equipment replacement method according to the embodiment is a turbine main body equipment replacement method for replacing an existing turbine main body equipment in a power plant with a new turbine main body equipment, and includes an on-site step in the power plant and a factory step in a factory. The on-site step includes an existing equipment removal step of removing the existing turbine main body equipment and existing piping to be removed around the existing turbine main body equipment, a main body equipment installation step of installing the new turbine main body equipment after the existing equipment removal step, and a main body equipment installation step of installing the new turbine main body equipment around the existing piping to be removed after the main body equipment installation step. a main equipment circumferential piping carrying step of carrying in the main equipment circumferential piping to a position where a new main equipment circumferential piping to be installed in place of the new turbine main equipment will be connected to the new turbine main equipment and where the main equipment circumferential piping to be connected to an existing piping to be connected that remains after the removal of the existing piping to be removed will be connected; and a piping connection step of connecting the main equipment circumferential piping to the new turbine main equipment and connecting the main equipment circumferential piping to the existing piping to be connected after the main equipment circumferential piping carrying step, the factory step includes, in the factory, carrying out the steps of: a factory manufacturing step of manufacturing the main equipment surrounding piping, a support device installation step of installing a main equipment support device included in a main equipment surrounding piping assembly device, a main equipment installation step of installing and supporting the new turbine main equipment on the main equipment support device, a connection position confirmation step of connecting and assembling the main equipment surrounding piping to the new turbine main equipment and confirming that the connection position with the existing piping to be connected is correct, and a factory assembly step of assembling the main equipment surrounding piping into a unit that can be transported to the site for connection with the existing piping to be connected. The method is characterized by having a step of shipping the piping around the main equipment to the power plant for the main equipment piping delivery step. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a flowchart showing a procedure of a turbine body equipment replacement method according to the first embodiment. [Diagram 2] FIG. 2 is a conceptual configuration diagram showing a state in a factory step of the turbine body equipment replacement construction method according to the first embodiment. [Diagram 3]FIG. 1 is a process diagram showing an on-site process for replacing turbine main body equipment using a conventional method. [Figure 4] FIG. 4 is a process diagram showing an on-site process of turbine body equipment replacement according to the first embodiment. [Diagram 5] FIG. 11 is a conceptual configuration diagram showing a state in a factory step of a turbine body equipment replacement method according to a second embodiment. [Figure 6] FIG. 11 is a conceptual configuration diagram showing a state in a factory step of a turbine body equipment replacement construction method according to a third embodiment. [Figure 7] FIG. 11 is a flowchart showing a procedure of a turbine body equipment replacement method according to a fourth embodiment. [Figure 8] FIG. 13 is a conceptual configuration diagram showing a state in a factory step of a turbine body equipment replacement method according to a fourth embodiment. [Figure 9] FIG. 11 is a process diagram showing an on-site process of turbine body equipment replacement according to the fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a turbine main body replacement method and a main body surrounding piping assembly device according to an embodiment of the present invention will be described with reference to the drawings. Hereinafter, the same or similar parts will be denoted by the same reference numerals, and duplicated explanations will be omitted.

[0011] [First embodiment] Fig. 1 is a flow diagram showing the procedure of the turbine main body equipment replacement method according to the first embodiment. Specifically, Fig. 1 shows the procedure of the turbine replacement method when replacing an existing turbine main body equipment in a power plant with a new turbine main body equipment.

[0012] Here, the turbine main body equipment means the turbine body, but in the case of a gas turbine, the turbine main body equipment also includes the compressor and combustor.

[0013] The following description will be given taking a gas turbine as an example, but the invention can also be applied to other turbines such as steam turbines, etc. In the following gas turbine example, the turbine main body device 10 has a combustor 11, a compressor 12, and a gas turbine 13, as shown in FIG.

[0014] Before explaining the steps at the power plant, we will explain the steps at the factory.

[0015] First, the turbine main body 10 is manufactured and assembled in a gas turbine manufacturing factory (step S11). The manufactured turbine main body 10 is sent to a factory (piping factory) where piping is manufactured and assembled.

[0016] After confirmation is performed at the piping side factory in step S20 described later, the turbine main body device 10 is transported to the power plant (step S12).

[0017] Next, the factory step S20 at the piping factory will be described. In the factory step S20, the foundation and peripheral equipment of the power plant are reproduced in the piping factory, and the piping is assembled and checked before the main equipment surrounding piping to be newly installed in place of the existing piping to be removed, which will be described later, is carried into the power plant.

[0018] FIG. 2 is a conceptual configuration diagram showing a state in a factory step S20 of the turbine body equipment replacement method according to the first embodiment.

[0019] In the factory step S20, the main equipment surrounding piping assembly device 100 is used to assemble the main equipment surrounding piping 20 and to check whether the main equipment surrounding piping 20 satisfies the connection conditions with the existing piping (not shown) to be connected at the power plant when the main equipment surrounding piping 20 is installed on-site.

[0020] The main body surrounding piping assembling device 100 has a main body supporting device 110 and a piping supporting device 120 .

[0021] The main equipment support device 110 supports the turbine main equipment 10, which includes the combustor 11, the compressor 12, and the gas turbine 13. The main equipment support device 110 has a receiving member 111 and a main equipment base 112 provided on the compressor 12 side and the gas turbine 13 side, respectively.

[0022] The compressor 12 and the gas turbine 13 are directly mounted on the support members 111. The main equipment base 112 receives the load of the turbine main equipment 10 applied to the support members 111 and transmits the load to the floor of the factory.

[0023] The axial positioning of the turbine main body 10 is achieved, for example, by aligning the axial position of the main body positioning member 14 provided on the surface of the compressor 12 with the axial center of the receiving member 111 on the compressor 12 side. Here, the main body positioning member 14 is, for example, a turbine center pin. The positioning of the turbine main body 10 in the directions perpendicular to the axis and horizontal to the axis is also achieved by aligning the axial positions of the receiving member 111 and the turbine main body 10 when viewed from above, or by setting a predetermined distance between them.

[0024] As a result, a relative position is determined between the turbine main body 10 and the main body surrounding piping assembly device 100. In this manner, the foundation and peripheral arrangement of the turbine main body 10 in the power plant are reproduced in the factory.

[0025] The piping support device 120 is, for example, a frame installed on the floor of a factory. The piping support device 120 supports the main equipment surrounding piping 20, that is, for example, the fuel piping 21 and the fuel scavenging piping 22 connected to the combustor 11, and the first bleed cooling air piping 23 and the second bleed cooling air piping 24 connecting the gas turbine 13 and the compressor 12.

[0026] At the connection portions of the compressor 12 to the first bleed cooling air piping 23 and the second bleed cooling air piping 24, a compressor first flange 12f and a compressor second flange 12g are provided.

[0027] In the gas turbine 13, a gas turbine first flange 13f and a gas turbine second flange 13g are provided at the connection portions with the first bleed cooling air piping 23 and the second bleed cooling air piping 24, respectively. In addition, corresponding mating flanges are provided at the connection portions with the first bleed cooling air piping 23 and the second bleed cooling air piping 24, respectively.

[0028] In the example shown in FIG. 2, an bleed pipe flange 24a is provided midway through the first bleed cooling air piping 23 so as to divide the first bleed cooling air piping 23 into two parts with an appropriate length taking into consideration delivery to the power plant.

[0029] As a factory step S20 in the piping factory, first, piping around the main body device is manufactured based on the design drawings (step S21).

[0030] Next, the turbine main body 10 manufactured in step S11 is received and the turbine main body 10 is installed (step S22). That is, the turbine main body 10 is mounted on the main body support device 110 while aligning the position of the main body positioning member 14 with the position of the main body support device 110 or a position at a predetermined interval.

[0031] Next, the main body equipment surrounding piping 20 is assembled (centering, welding) and checked (step S23). In this step, first, connection and assembly with the turbine main body equipment 10 is performed, and the connection range is gradually expanded to the side farther from the turbine main body equipment 10. Once assembly is completed with a general set of connections, checking is performed. The checking is performed to check whether each end of the main body equipment surrounding piping 20 after connection and assembly in the factory meets the connection conditions with the existing piping to be connected. The checking includes checking the connection position, direction, and connection shape.

[0032] The main equipment surrounding piping 20 that has been confirmed in step S23 is prepared for shipment and shipped to the power plant (on-site) (step S24). In preparation for shipment, it is disassembled into the smallest units, taking into consideration transportation to the site. For example, the second bleed cooling air piping 24 is divided by the bleed pipe flange 24a, packaged for transportation, and shipped. However, in order to minimize on-site connection work, if transportation to the site is possible, it is shipped in a connected and assembled state as much as possible. The main equipment surrounding piping 20 shipped from the factory is transported to the power plant (step S25).

[0033] Next, step S30 at the power plant will be described in detail.

[0034] First, the existing turbine main body equipment to be replaced and the existing piping to be removed around the existing turbine main body equipment are removed (step S31). After the existing piping to be removed is removed in this existing piping removal step S31, the existing piping remains. This existing piping will interface with the main body equipment surrounding piping 20 to be newly installed in place of the existing piping to be removed as the existing piping to be connected. Therefore, this existing piping removal step S31 includes a step of confirming whether the interface conditions between the existing piping to be connected and the main body equipment surrounding piping 20 are as specified in the design drawings. The interface conditions include the interface position, direction, interface shape, etc., including cases where a groove is cut on the existing side.

[0035] Next, the turbine main body equipment 10 transported to the power plant in step S12 is carried in and installed (step S32).

[0036] Next, the main equipment surrounding piping 20 that has been assembled and checked at the factory in the factory step S20 and transported to the power plant is carried in (step S33). That is, the main equipment surrounding piping 20 is carried in to a position where the new turbine main equipment 10 and the connection target existing piping that remains after the removal of the removal target existing piping will be connected. Since it has been checked at the factory that the connection conditions are met, the main equipment surrounding piping 20 is in a state where it can be connected without any problem to the new turbine main equipment 10 and the connection target existing piping.

[0037] Next, the main body equipment surrounding piping 20 is connected to the new turbine main body equipment 10 and the connection target existing piping (step S34). Through the above, the turbine main body equipment 10 and the main body equipment surrounding piping 20 are installed in place of the existing ones.

[0038] Next, a test run is carried out after the replacement work (step S35).

[0039] Next, the effects of this embodiment will be described while comparing it with a conventional method for comparison.

[0040] Fig. 3 is a process diagram showing an on-site process of gas turbine replacement by a conventional method, and Fig. 4 is a process diagram showing an on-site process of gas turbine replacement according to the first embodiment.

[0041] A conventional on-site process for replacing a gas turbine includes the steps of removing existing equipment, which corresponds to step S31 in this embodiment, carrying in and installing the turbine main body equipment, which corresponds to step S32 in this embodiment, connecting piping around the main body equipment, which corresponds to step S34 in this embodiment, and preparing for trial operation, which corresponds to step S35 in this embodiment. However, in addition to these steps, the conventional on-site process for replacing a gas turbine includes a step of assembling piping around the main body equipment.

[0042] On the other hand, in this embodiment, in the on-site process of replacing the turbine main body 10, assembling of the piping around the main body is performed in the factory step S20, so that the conventional on-site step of assembling the piping around the main body is not required.

[0043] As described above, according to this embodiment, in the factory step, the foundation and peripheral layout of the turbine main body 10 of the power plant are reproduced to confirm that the fitting conditions are met. As a result, the new turbine main body 10 and the existing piping to be connected can be connected without any problems, so that the connection work can be performed by simply carrying in the main body surrounding piping 20 without any adjustments on site.

[0044] In this way, the process of transporting the components for the piping 20 around the main equipment and processing the components to connect to the existing connection targets, which was a critical path on-site in the conventional construction method, is no longer necessary.

[0045] As described above, the turbine main body replacement construction method and the main body surrounding piping assembly device according to this embodiment can shorten the period during which power generation is stopped during turbine main body renewal construction.

[0046] [Second embodiment] FIG. 5 is a conceptual configuration diagram showing a state in a factory step of the turbine body equipment replacement method according to the second embodiment.

[0047] This embodiment is a modification of the first embodiment, and differs only in the main equipment support device 110a of the main equipment surrounding piping assembling device 100a, and is otherwise similar to the first embodiment.

[0048] The main body support device 110a has a receiving member 111, an iron plate 113, a surface plate 114, a temporary stand 115, and a shim 116 for adjusting the height.

[0049] The support member 111 is the same as in the first embodiment. The foundation of the device is further strengthened by a surface plate 114 placed on an iron plate 113 laid on the floor of the factory. The height direction is adjusted by adjusting the gap between the surface plate 114 and a temporary stand 115 mounted thereon with an adjustment shim 116.

[0050] With the above configuration, the main device stand device 110a according to this embodiment can reproduce the actual location with even greater accuracy.

[0051] [Third embodiment] FIG. 6 is a conceptual configuration diagram showing a state in a factory step of the turbine body equipment replacement construction method according to the third embodiment.

[0052] This embodiment is a modification of the first embodiment, and differs only in the main equipment support device 110b of the main equipment surrounding piping assembling device 100b, and is otherwise similar to the first embodiment.

[0053] The main body device support device 110b has a receiving member 111, a base plate 114, and a vertically movable stand 117 disposed between the receiving member 111 and the base plate 114.

[0054] As described above, the main body device support device 110b according to this embodiment has the vertically movable stand 117 between the receiving member 111 and the base plate 114, which is variable in the height direction, and thus the height can be easily adjusted.

[0055] [Fourth embodiment] FIG. 7 is a flowchart showing a procedure of the turbine body equipment replacement method according to the fourth embodiment.

[0056] This embodiment is a modification of the first embodiment. The turbine body 10 is fabricated in the factory and then directly transported to the site, i.e., the power plant.

[0057] FIG. 8 is a conceptual configuration diagram showing a state in a factory step of the turbine body equipment replacement method according to the fourth embodiment.

[0058] In this configuration diagram, a simulated turbine main body device 10a having a simulated combustor 11a, a simulated compressor 12a, and a simulated gas turbine 13a is used instead of the turbine main body device 10 in the first embodiment.

[0059] The simulated turbine main body equipment 10a has the same external shape as the newly used turbine main body equipment 10. Here, the same external shape means that at least the outer dimensions and the interface portion with the main body equipment peripheral piping are the same as those of the turbine main body equipment 10.

[0060] FIG. 9 is a process diagram showing an on-site process of replacing a gas turbine according to the fourth embodiment.

[0061] As shown in FIG. 9, the turbine main body 10 and the main body surrounding piping 20 manufactured in the respective factories are transported and carried into the power plant independently of each other.

[0062] In this embodiment, since the turbine main body 10 is not used in the step S22a of assembling and checking the turbine main body surrounding piping, it is not necessary to complete the turbine main body 10 ahead of schedule in time for this step. Also, it is not necessary to transport the turbine main body 10 to a factory on the piping side.

[0063] As described above, the turbine main body replacement method and the main body surrounding piping assembly device according to this embodiment can eliminate the need to advance the manufacturing process for the turbine main body 10 and the need to incur transportation costs.

[0064] According to the embodiment described above, it is possible to provide a new turbine main body replacement method and a main body surrounding piping assembly device that shorten the period during which power generation is stopped in relation to the renewal work of the turbine main body.

[0065] Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. Features of these embodiments may be combined. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0066] 10...turbine main body, 10a...simulated turbine main body, 11...combustor, 11a...simulated combustor, 12...compressor, 12a...simulated compressor, 12f...compressor first flange, 12g...compressor second flange, 13...gas turbine, 13a...simulated gas turbine, 13f...gas turbine first flange, 13g...gas turbine second flange, 14...main body positioning member, 20...piping around main body, 21...fuel piping, 22... Fuel scavenging piping, 23...first bleed cooling air piping, 24...second bleed cooling air piping, 24a...bleed pipe flange, 100, 100a, 100b...main equipment surrounding piping assembly device, 110, 110a...main equipment support device, 111...receiving member, 112...main equipment foundation, 113...iron plate, 114...base plate, 115...temporary stand, 116...shim, 117...up and down movable stand, 120...piping support device, 130...gas turbine model

Claims

1. A turbine main body replacement method for replacing an existing turbine main body at a power plant with a new turbine main body, comprising the steps of: an on-site step at the power plant; Factory steps in a factory; having The on-site step includes: an existing installation removal step of removing the existing turbine main body equipment and existing piping to be removed around the existing turbine main body equipment; a main body equipment installation step of installing the new turbine main body equipment after the existing equipment removal step; a main equipment surrounding piping carrying step of carrying the main equipment surrounding piping to a position where the main equipment surrounding piping to be newly installed in place of the existing piping to be removed and the new turbine main equipment are connected to each other, and the main equipment surrounding piping and the existing piping to be connected that is left after the removal of the existing piping to be removed are connected to each other; a piping connection step of connecting the main equipment periphery piping to the new turbine main equipment and connecting the main equipment periphery piping to the existing piping to be connected after the main equipment periphery piping carrying-in step; having The factory step includes: a factory manufacturing step of manufacturing the main body peripheral piping in the factory before the main body peripheral piping carrying-in step; a support device installation step of installing a main body device support device included in the main body surrounding piping assembly device; a main body installation step of installing and supporting the new turbine main body equipment on the main body equipment support device; a connection position confirmation step of connecting and assembling the main body equipment peripheral piping to the new turbine main body equipment, and confirming that the connection position with the existing piping to be connected is correct; a factory assembly step of assembling the piping around the main body device into a unit that can be transported to a site for connection to the existing piping to be connected; A step of shipping the main equipment surrounding piping to the power plant for the main equipment surrounding piping carrying-in step; A turbine body equipment replacement method comprising the steps of:

2. 2. The turbine main body replacement method according to claim 1, wherein in the factory step, a simulated turbine main body simulating the new turbine main body is used in place of the new turbine main body.

3. 3. The turbine main body replacement method according to claim 1, wherein in the factory step, a body positioning member is used to reproduce a foundation of the new turbine main body in the power plant in the factory.

4. The main body surrounding piping assembling device used in the factory step according to claim 1, a main body support device for supporting the new turbine main body; A pipe support device for supporting the pipes around the main body device; A device for assembling piping around a main body device, comprising:

5. 5. The main body surrounding piping assembling device according to claim 4, wherein the main body supporting device is constructed so that an upper end thereof can be moved up and down.

Images