JP2004263988A - Method and fixture for erecting heat transfer pipe panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an installation method for a heat transfer pipe panel for a heat exchanger used in a transverse-type exhaust heat recovery boiler and an erecting fixture for the heat transfer pipe panel, capable of eliminating a lifting lug exchange process for hanging onto a hanging crane, shortening erecting time, and eliminating dangerous altitude work. <P>SOLUTION: In this erecting method for the heat transfer pipe panel, the heat transfer pipe panel 3 comprising a heat transfer pipe group and an upper header 4 and a lower header 5 of the heat transfer pipe group are placed on the erecting fixture 6, the lower header 5 of the heat transfer pipe panel 3 is fixed at the erecting fixture 6 without fixing the upper header 4 of the heat transfer pipe panel 3 on the erecting fixture 6, and the erecting fixture 6 and the upper header 4 of the heat transfer pipe panel 3 are respectively hung by a lifting crane 13 and a crane 22 for erecting. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an exhaust heat recovery boiler (hereinafter, sometimes referred to as HRSG) used in a combined cycle (combined cycle) power generation plant, and more particularly to a method of erecting a heat transfer tube panel of a heat exchanger of a heat recovery steam generator and a heat transfer tube. It is related to a panel raising jig.
[0002]
[Prior art]
Gas turbine combined cycle power plants have higher thermal efficiency than thermal power plants using coal-fired boilers, etc., and use natural gas as the main fuel. And is attracting attention as a high-potential power plant. Also, the combined cycle power plant is excellent in load response, and is attracting attention as a power generation method suitable for a high-frequency start-stop operation (Daily Start Daily Stop) capable of rapidly changing the power generation output according to the power demand. I have.
[0003]
The combined cycle power plant is a plant having a gas turbine for power generation, an HRSG that generates steam using exhaust gas from the gas turbine, and a steam turbine that generates power using steam obtained by the HRSG as main components. .
[0004]
FIG. 1 shows a schematic configuration diagram of a horizontal HRSG provided with an auxiliary burner therein. The HRSG includes a casing 1 which is a gas duct through which exhaust gas G from a gas turbine flows in a horizontal direction. An auxiliary burner 2 is arranged in the vicinity of the inlet, and a number of heat transfer tube panels 3 are arranged on the downstream side. The heat transfer tube panel 3 generally includes a superheater 3a, an evaporator 3b, and a economizer 3c arranged in order from the upstream side to the downstream side, but may include a reheater (not shown). .
[0005]
FIG. 5 shows a method of installing a heat transfer tube panel 3 of a heat exchanger of a conventional horizontal waste heat recovery boiler. The heat transfer tube panel 3 of the horizontal exhaust heat recovery boiler shown in FIG. 5 has a configuration in which a heat transfer tube group composed of heat exchange fin wound tubes and an upper header 4 and a lower header 5 of the heat transfer tube group are combined. It is necessary to raise the fin-wrapped tube so as not to be damaged by the bending of the heat tube panel 3. For this purpose, as a method of erecting the heat transfer tube panel 3, as shown in FIG. 6, a temporary suspension lug 7 provided on the upper header 4 of the heat transfer tube panel 3 is fixed to the erecting jig 6. The lower header 5 is fixed to the lug 8 with bolts 9, and the lower header 5 is fixed to the supporting support 10 of the jig 6. As shown in FIG. 5, the upper suspension lug 11 and the lower suspension lug 12 of the vertical jig 6 are respectively set. The crane is lifted and raised by the wires 13 and 14 of the crane, and is moved to a predetermined work floor position with the upright jig 6 being vertical, and the erecting jig 6 is set up on the ground and suspended by a crane. The worker removes the bolt 9 connecting the temporary suspension lug 7 of the upper header 4 and the fixed lug 8 of the vertical jig 6 on the temporary scaffold 18, and locks the upper suspension lug 11 of the vertical jig 6. Hanging cranes Remove the emissions of lifting lugs 15, fitted with a fixing lug 16 lifting lugs 15 of the crane for hanging (Figure 6) of the heat transfer tube panel 3, I had to move the heat transfer tube panel 3 at a predetermined upholstered position. Further, the erecting jig 6 was again suspended on the original ground by using two cranes to prepare for the erecting of the next heat transfer tube panel 3.
[0006]
[Patent Document 1]
JP-A-06-300210
[Patent Document 2]
JP-A-59-183485 [0008]
[Problems to be solved by the invention]
In the prior art, in the work of separating the heat transfer tube panel 3 shown in FIG. 5, the hanging metal 15 of the hanging crane is raised and raised from the upper hanging lug 11 of the jig 6 on the temporary scaffold 18 installed at a high place. Dangerous work such as replacing the fixing lug 16 on the heat transfer tube panel 3 and removing the bolt 9 connecting the temporary suspension lug 7 of the heat transfer tube panel 3 and the fixing lug 8 of the erecting jig 6. Will be. Further, after attaching the hanging metal fittings 15 of the hanging crane to the permanent fixing lugs 16 shown in FIG. 6, the crane is restrained until a series of operations for removing the hanging metal fittings 15 of the temporary hanging lugs 7 is completed. However, there is a problem that work efficiency is poor.
[0009]
An object of the present invention is to eliminate the need for a step of changing a hanging bracket for changing to a hanging crane, thereby shortening an erecting operation time, and exchanging heat in a horizontal exhaust heat recovery boiler that eliminates dangerous high-place work. An object of the present invention is to provide a method for installing a heat transfer tube panel of a vessel and a jig for erecting the heat transfer tube panel.
[0010]
[Means for Solving the Problems]
An object of the present invention is to erect a heat transfer tube panel that is raised by a lifting crane to install a heat transfer tube panel including a heat transfer tube group and an upper and lower headers of the heat transfer tube group at an installation site of a horizontal exhaust heat recovery boiler. In the method, the heat transfer tube panel is placed on the erecting jig, and the upper header of the heat transfer tube panel is not fixed to the erecting jig, and the erecting jig and the upper end of the heat transfer tube panel are respectively lifted by the lifting crane. The problem is solved by a method of erecting a heat tube panel.
[0011]
Further, in the method of erecting the heat transfer tube panel, the heat transfer tube panel is placed on the erecting jig, the lower header of the heat transfer tube panel is fixed to the erecting jig, and the upper header is fixed to the erecting jig. Instead, the erecting jig and the upper header of the heat transfer tube panel can be erect while being lifted by a lifting crane.
[0012]
Further, when the erecting jig and the upper header of the heat transfer tube panel are each raised while being lifted by a lifting crane, the erecting jig is rotated around a pin provided in a lower header fixing portion of the erecting jig. Thus, the heat transfer tube panel can always be erected around the pin of the erection jig, and since the rotation fulcrum is always at the same position, the work of erecting the heat transfer tube panel is stabilized.
[0013]
Further, an object of the present invention is to provide a heat transfer tube panel including a heat transfer tube group for performing the work of raising the heat transfer tube panel and upper and lower headers of the heat transfer tube group at an installation site of a horizontal exhaust heat recovery boiler. A fixture for raising and lowering a heat transfer tube panel with a lifting crane for holding the heat transfer tube panel for installation, and a fixing portion for fixing a heat transfer tube panel lower header and a lower end portion. Erecting a heat transfer tube panel comprising a lower support, a stopper provided at a base of the lower support so as to extend in a direction perpendicular to a plane formed by the lower support, and a pin for rotatably connecting the lower support and the stopper. It is solved by a jig.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 2 is a diagram showing a schematic work procedure using the erecting jig according to the embodiment of the present invention, and FIG. 3 is a plan view (FIG. 3A) and a side view of the erecting jig shown in FIG. (FIG. 3 (b)) and FIG. 4 are diagrams showing an outline of a series of operations in which the heat transfer tube panel 3 is erected using the erecting jig shown in FIG. 2 and is installed in the horizontal exhaust heat recovery boiler. is there.
[0015]
As shown in FIGS. 2 and 3, the heat transfer tube panel 3 is placed on an upright jig 6, and a bolt 9 is attached to a permanent lifting lug 17 attached to the upper header 4 of the heat transfer tube panel 3. The heat transfer tube panel 3 is adjusted so as to be in contact with the load receiving fixing lug 20 provided on the mounting and raising jig 6.
[0016]
As shown in FIG. 2, a wire 22 of a lifting crane is attached to a lifting lug 17 attached to the upper header 4 of the heat transfer tube panel 3, and a wire 13 of the erecting crane is mounted on the jig 6. Attach to the hanging lug 11.
[0017]
The lower end of the erecting jig 6 has a lower support 27 extending in the longitudinal direction thereof, a pin 28 provided at the base of the lower support 27, and a flat surface formed by the lower support 27 at a mounting portion of the pin 28. A stopper 29 extending in the right angle direction is provided, and the erecting jig 6 is raised with the pin 28 as a fulcrum. When the heat transfer tube panel 3 comes into contact with the support 27, the heat transfer tube panel 3 stands up and stops at an angle of 80 degrees with respect to the lower support 27 of the jig 6.
[0018]
When the erecting jig 6 is lifted, the lower end of the erecting jig 6 has a stopper 29 extending in a direction perpendicular to a plane formed by the lower support 27, the pin 28, and the lower support 27 provided at the mounting portion of the pin 28. Is raised with the pin 28 as a fulcrum. When the stopper 29 abuts on the lower support 27 by the upright operation, the heat transfer tube panel 3 has a structure in which the heat transfer tube panel 3 stops at an angle of 80 degrees with respect to the lower support 27 of the jig 6. The wire 22 of the lifting crane set on the lifting lug 17 of the upper header 4 of 3 is wound up, the heat transfer tube panel 3 is removed, and a predetermined work of hanging the heat transfer tube panel 3 is performed. After removing the heat transfer tube panel 3, the erecting jig 6 returns to its original position by lowering the wire 22 of the erecting crane.
[0019]
In this method, as shown in FIG. 2, the heat transfer tube panel 3 is erected while its own weight is deposited in the load receiving and fixing lug 20, and the heat transfer tube panel 3 is lifted. Lifting work can be carried out without hanging. Further, since the erecting jig 6 and the heat transfer tube panel 3 are not fixed with bolts or wire lines, a work floor at a high place and dangerous work for removal can be eliminated.
[0020]
【The invention's effect】
As described above, the present invention eliminates work in high places, thereby eliminating the need for installation of a working floor and replacing work of a heat transfer tube panel with a lifting crane. In this way, it is possible to eliminate dangerous work and shorten work time.
[0021]
Further, since the erecting operation of the heat transfer tube panel has a pin structure, the same repetitive operation is performed, and the number of skilled lifting workers and monitoring personnel can be reduced.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a horizontal HRSG.
FIG. 2 is a view showing the outline of a general operation using the erecting jig according to the embodiment of the present invention.
FIG. 3 is a plan view (FIG. 3A) and a side view (FIG. 3B) of the erecting jig shown in FIG.
FIG. 4 is a view schematically showing a series of operations in which a heat transfer tube panel 3 is erected using the erection jig shown in FIG. 2 and is installed in a horizontal exhaust heat recovery boiler.
FIG. 5 is a view showing the outline of a general operation using a conventional erecting jig.
6 is a plan view (FIG. 6A) and a side view (FIG. 6B) of the erecting jig shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Casing 2 Burner burner 3 Heat transfer tube panel 3a Superheater 3b Evaporator 3c Energy saving device 4 Upper header 5 Lower header 6 Standing jig 7 Temporary suspension lug 8 Fixed lug 9 Bolt 10 Support support 11 Upper suspension lug 12 Lower Hanging lugs 13, 14 Wires 15 Hanging hardware of hanging crane 16 Fixed lugs 17 Lifting lugs 18 Temporary scaffolding 20 Load receiving fixed lugs 22 Wires 27 Lower support 28 Pins 29 Stopper

Claims (4)

In a method of erecting a heat transfer tube panel that is raised by a lifting crane to install a heat transfer tube panel including a heat transfer tube group and an upper and lower header of the heat transfer tube group at an installation site of a horizontal exhaust heat recovery boiler,
The heat transfer tube panel is placed on the erecting jig, and the upper rung of the heat transfer tube panel is not raised and fixed to the jig, and the erecting jig and the upper end of the heat transfer tube panel are each lifted by a lifting crane. Upright heat transfer tube panel. Place the heat transfer tube panel on the erecting jig, raise the lower header of the heat transfer tube panel and fix it on the jig, and do not fix the upper header on the erecting jig. 2. The method according to claim 1, wherein the upper header is raised while being lifted by a lifting crane. When erecting the erecting jig and the upper header of the heat transfer tube panel while lifting them with a lifting crane, respectively, rotate the erecting jig around the pin provided at the fixing part of the lower erecting jig of the heat transfer tube panel. 2. The method according to claim 1, wherein the heat transfer tube panel is erected. In order to install a heat transfer tube panel composed of a heat transfer tube group and an upper and lower header of the heat transfer tube group at the installation site of the horizontal exhaust heat recovery boiler, the heat transfer tube panel is held up by a lifting crane while holding the heat transfer tube panel. Upright jig,
A fixing portion for fixing the heat transfer tube panel lower header, a lower support provided at a lower end portion, and a stopper provided at a base of the lower support so as to extend in a direction perpendicular to a plane formed by the lower support, A jig for raising a heat transfer tube panel, comprising a pin for rotatably connecting the lower support and a stopper.

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