JPH1122925A - Combustion catalyst holding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a combustion catalyst from excessively deforming and slipping off from the inside of a combustion cylinder, and surely use the combus tion catalyst stably for a long period of time when the combustion catalyst which is formed by winding a band-shaped metal foil carrying a catalyst in multiple layers, is arranged in the combustion cylinder having a comparatively large diameter. SOLUTION: For this device, on the upstream side of a combustion catalyst which is formed by winding a band-shaped metal foil carrying a catalyst in multiple layers, an apparatus 17 such as a mixer is arranged, and on the downstream side, a combustion catalyst holding device 18 is arranged. By this method, even for a combustion catalyst having a large diameter, the movement of the whole body in the axial direction by a mixed gas of a fuel and air can be suppressed, and the combustion catalyst is prevented from excessively deforming and slipping off from the combustion cylinder, and is safely and surely held in a combustion chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion catalyst holding device in a combustor such as a gas turbine, a boiler, a power generator, and an exhaust gas reburning device.

[0002]

2. Description of the Related Art Conventionally, a combustion catalyst in the above combustor includes:
A ceramic or metal carrier carrying a catalyst is used. By the way, in recent years, with the advent of large-sized combustors, a catalyst having a large flow passage area has been required in recent years. Such a large-diameter combustion catalyst carrier having a large flow path area cannot withstand severe thermal shock even if it can be molded in the case of ceramics, and it is extremely troublesome to manufacture an integral honeycomb structure in the case of metal. there were.

In order to maintain the contact between these ceramics and the integrated metal carrier, the carrier is immersed in the liquid or the liquid is dropped on the carrier, and then the platinum group metal or its oxide is applied to the carrier. Was carried finely, so that the catalyst carrying state was not uniform. On the other hand, as shown in FIG. 10, after the catalyst 2 is supported on the corrugated strip-shaped metal foil 1, the catalyst 2 is wound in multiple layers.
In the method of forming the catalyst passages 3 as shown in FIG. 11, the wash coat and the catalyst support can be performed with the strip-shaped metal foil 1 as it is, and the catalyst support of each of the catalyst passages 3 configured by being wound in multiple layers is made uniform. It becomes easy to do. Further, by carrying the wash coat catalyst only on one side of the strip-shaped metal foil 1, it becomes possible to manufacture the combustion catalyst 5 including the non-catalyst passage 4.

The combustion catalyst 5 can be manufactured by simply folding the corrugated band-shaped metal foil 1 carrying the catalyst 2 on one side, for example, by folding it into two parts (FIG. 12a). When elastically set on the inner peripheral wall of the combustion chamber of a combustion device having a small flow passage area, it does not deform even when the pressure of the mixed gas flow of fuel and air is applied, but has a large flow passage area of the combustor. When a large combustion catalyst is set in the combustion chamber of the combustion device, when the pressure of the mixed gas flow of fuel and air is applied as shown in FIG. 12b, the portion close to the peripheral wall is not deformed by the pressure, On the other hand, the vicinity of the center far from the peripheral wall is pushed downstream by the pressure and deformed. In order to prevent this, it is necessary to fix the strip-shaped metal foil 1, but it is preferable to fix the strip-shaped metal foil 1 carrying the catalyst 2 by welding or the like to form a honeycomb structure. It is extremely difficult to weld the strip-shaped metal foil 1.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a combustion catalyst holding device capable of safely and reliably holding the above-described large-diameter combustion catalyst in a combustion chamber.

[0006]

According to the present invention, a catalyst is carried on a strip-shaped metal foil, and a combustion catalyst formed by winding the catalyst in multiple layers is disposed in a cylindrical body, and a combustion catalyst holder which is curved on the downstream side is used. A combustion catalyst holding device, which holds the combustion catalyst or holds the combustion catalyst at a rear end portion of a tension member fixed on the upstream side and prevents deformation thereof, and has various aspects. ing.

Hereinafter, the present invention will be described in detail. In the present invention, basically, the catalyst is carried on the above-mentioned strip-shaped metal foil, and when the combustion catalyst formed by winding the multi-layered metal foil particularly in a large-diameter combustion cylinder of the combustion catalyst holding device is used, In order to prevent the central portion of the combustion catalyst from being deformed by the pressure of the supplied gas mixture of fuel and air, a combustion catalyst holder is brought into contact with or close to the combustion catalyst on the downstream side of the combustion catalyst. It has a characteristic in that it is installed. The configuration of the combustion catalyst holder is not particularly limited as long as deformation of the combustion catalyst to the downstream side can be prevented.In order to completely burn unburned fuel in the combustion catalyst, the flow passage in the combustion cylinder is substantially formed. Even if it is a flame stabilizer having a flame holding function installed so as to completely block, even if it is a cross-shaped or parallel installed, preferably a radially installed beam, it is also installed in a crossed or parallel manner Preferably, the wires may be radially installed. If the combustion catalyst holder does not have a flame holding function, it is preferable to separately install a flame stabilizer downstream of the combustion catalyst holder.

[0008] When the wire is installed, it is stretched to the extent that the inner surface of the combustion cylinder is slackened, or a portion of the tension member that penetrates the combustion catalyst or the like in the center of the combustion cylinder is located downstream of the combustion catalyst. The wire may be stretched to the extent that there is a slack between the combustion cylinders. When the combustion catalyst is deformed downstream so that its function is not damaged, the wire is tensioned (curved) in an arc shape and the combustion catalyst is deformed. It is desirable to prevent further deformation. It is more preferable that a support grid is provided downstream of the combustion catalyst, and a wire is adhered to the grid. If the combustion catalyst is stably held in the combustion cylinder in a state where pressure is not applied, it is not always necessary to install another member on the upstream side of the combustion catalyst, Also, it is desirable to increase the stability of the combustion catalyst by installing an appropriate device and sandwiching the combustion catalyst between the device and the combustion catalyst holder. The device may be a function merely for positioning the combustion catalyst on the upstream side, but may be a mixing function of mixing a fuel and air required by a normal combustion device to produce a mixed gas, It is even more preferable to have a gas rectifying function to regulate the flow of air.

When a combustion catalyst is held by using a wire or the like, pressure is applied to the combustion catalyst to bend the wire and prevent the deformation of the combustion catalyst. The present invention is not limited to this.A member that is not deformed such as a beam or a grid is connected to a device fixed to a combustion cylinder located on the upstream side by a tension member, and the pressure applied to the combustion catalyst is increased on the upstream side through the beam, the grid, and the tension member. It may be supported to prevent the deformation of the combustion catalyst. Further, the above-described deformation prevention by bending of the wire and the deformation prevention by connection to the upstream device may be combined, that is, the deformable wire may be connected to the device fixed to the combustion cylinder located on the upstream side by a tension member. .

[0010] The combustion catalyst of the present invention is formed by supporting a catalyst on a strip-shaped metal foil and winding it multiple times. As described above, such a combustion catalyst easily falls out of the combustion cylinder due to the pressure of the mixed gas or is easily deformed as shown in FIG.
The present invention is intended to solve the above-mentioned disadvantages of the combustion catalyst, and is therefore limited to the above configuration. Mixing of the fuel and air is performed on the upstream side of the combustion catalyst or the device. However, in the present invention, the configuration on the upstream side of the combustion catalyst or the device is not limited at all, and includes all configurations.

[0011]

According to a first aspect of the present invention, a catalyst is carried on a strip-shaped metal foil, and a combustion catalyst formed by winding the catalyst in multiple layers is disposed in a combustion cylinder, and an upstream device and a downstream combustion catalyst are arranged. A combustion catalyst holding device, wherein the combustion catalyst is held by a holding tool, and the equipment, the combustion catalyst, and the combustion catalyst holding tool are fastened by a tensile member that penetrates these components. In this combustion catalyst holding device, the combustion catalyst is disposed between the device fixed in the combustion cylinder and the combustion catalyst holder, and a tension member passing through the shaft center together with the combustion catalyst holder is fixed to the device. Thus, a tensile force is applied to the combustion catalyst holder that functions as a beam. It is most effective to shorten the span of the beam, and it is more effective because the center of the shaft acts as a continuous beam because it pulls the center of the shaft. In addition, one end of the tension member is fixed to a device on the low temperature side (approximately 300 ° C.) provided on the upstream side of the combustion catalyst, and the combustion catalyst retainer is used even when the pressure of the mixed gas flow of fuel and air is applied. The entire axial movement is suppressed, and the resulting load on the combustion catalyst holder is received by the low-temperature side equipment fixed to the combustion cylinder via a tensile member, and the beam effect due to a significant decrease in proof stress at high temperatures. And the design is simplified. Therefore, the combustion catalyst is safely and securely held in the fuel chamber without being greatly deformed or falling out of the combustion cylinder.

In a second aspect of the present invention, a catalyst is carried on a strip-shaped metal foil, and a combustion catalyst formed by winding the catalyst in multiple layers is disposed in a combustion cylinder, and an upstream device and a downstream combustion catalyst are arranged. Holding the combustion catalyst with a holder, fastening the device, the combustion catalyst and the combustion catalyst holder with a tensile member that penetrates them,
Further, a rear end portion of the combustion catalyst holder is locked in a locking portion formed by bending a rear end portion of the combustion cylinder inward, and is fixed in the combustion cylinder. is there.
In this combustion catalyst holding device, the combustion catalyst is arranged between the device fixed in the combustion cylinder and the combustion catalyst holder, fastened by a tension member, arranged in the combustion cylinder, and arranged inside the combustion cylinder downstream. Since the rear end of the combustion catalyst holder is locked to the locking portion, even if the pressure of the mixed gas flow is applied to the combustion catalyst, the axial movement of the entire combustion catalyst is suppressed by the low-temperature side device, Accordingly, the load applied to the combustion catalyst holder is received by the combustion cylinder. Therefore, the combustion catalyst is safely and securely held in the fuel chamber without being greatly deformed or falling out of the combustion cylinder.

According to a third aspect of the present invention, a catalyst is carried on a strip-shaped metal foil, and a combustion catalyst formed by winding the catalyst in multiple layers is disposed in a combustion cylinder, and is passed through from a downstream side of the combustion catalyst. A combustion air introduction pipe that reaches the upstream side of the equipment upstream of the combustion catalyst and has a downstream end closed is installed, and penetrates a peripheral wall near a closed portion of the combustion air introduction pipe and is outside the combustion cylinder. A plurality of combustion air introduction pipe beams reaching the combustion cylinder and the combustion air introduction pipe, and a downstream surface of the combustion catalyst is held by the combustion air introduction pipe beams. It is a holding device. In this combustion catalyst holding device, the combustion catalyst is disposed between the device fixed in the combustion cylinder and the combustion air introduction pipe beam, and communicates with the combustion cylinder through which the air flows. Since the pulling force is exerted by the combustion air introduction pipe fixed to the device through the beam and the axial center of the combustion cylinder, the combustion air introduction pipe and the combustion air introduction pipe beam are cooled by air and Therefore, even if the pressure of the mixed gas flow of fuel and air is applied to the combustion catalyst, the axial movement of the entire combustion catalyst is preferably suppressed by the radial combustion air introduction pipe beam. Accordingly, the load applied to the combustion air introduction pipe beam is received by the low-temperature side equipment and the combustion cylinder via the combustion air introduction pipe at the center of the shaft. Therefore, the combustion catalyst is safely and securely held in the fuel chamber without being greatly deformed or falling out of the combustion cylinder.

According to a fourth aspect of the present invention, a catalyst is carried on a strip-shaped metal foil, and a combustion catalyst formed by winding the catalyst in multiple layers is disposed in the combustion cylinder, and the inner surface of the combustion cylinder downstream of the combustion catalyst is disposed. A combustion catalyst holding device, characterized in that a plurality of wires are stretched over the same. In this combustion catalyst holding device, a plurality of cross-shaped or parallel wires are stretched in contact with or in proximity to the downstream side of the combustion catalyst, preferably in a loose state.
Even if the pressure of the mixed gas flow of fuel and air is applied to the combustion catalyst, the wire is bent or bent in an arc shape, and the presence of the wire prevents the combustion catalyst from being excessively deformed. Therefore, the combustion catalyst is safely and securely held in the fuel chamber without being greatly deformed or falling out of the combustion cylinder.

According to a fifth aspect of the present invention, a catalyst is carried on a strip-shaped metal foil, and a combustion catalyst formed by winding the catalyst in multiple layers is disposed in a combustion cylinder and penetrated from a downstream side of the combustion catalyst. A combustion catalyst holding device, wherein a plurality of wires are stretched between a downstream side of the combustion catalyst of a tension member fixed to a device on an upstream side of the combustion catalyst and an inner surface of the combustion cylinder.
In this combustion catalyst holding device, the wire stretched in the same manner as in the fourth embodiment is intended to prevent excessive deformation of the combustion catalyst, but in this embodiment, the wire is connected to a rod passing through the combustion catalyst or the like. The portion between the downstream side of the combustion catalyst and the inner surface of the combustion cylinder is stretched using, for example, welding or the like, and the combustion catalyst is held by the wire as in the fourth embodiment. In this case, the arc radius of the wire can be reduced to half compared with the case of the wire without the rod of the fourth mode, so that the deformation by the wire can be more reliably prevented. Therefore, the combustion catalyst is not greatly deformed or falls out of the combustion cylinder, and is more safely and securely held in the fuel chamber.

According to a sixth aspect of the present invention, a catalyst is carried on a strip-shaped metal foil, and a combustion catalyst formed by winding the catalyst in multiple layers is disposed in a combustion cylinder, and a cutout groove is provided downstream of the combustion catalyst. An engraved support grid is provided, and a plurality of tension members penetrated from the downstream side of the combustion catalyst and fixed to equipment upstream of the combustion catalyst, between the downstream side of the combustion catalyst and the inner surface of the combustion cylinder. A combustion catalyst holding device, wherein a wire is stretched through a notch groove of the support grid. In this combustion catalyst holding device, the combustion catalyst is arranged between a device fixed in the combustion cylinder and the support grid, and extends a wire, preferably radially, between the rod and the combustion cylinder penetrating the combustion catalyst and the like. Since the tension is exerted by the rods, even if the pressure of the mixed gas flow is applied to the combustion catalyst, the support grid suppresses the axial movement of the entire combustion catalyst, and the load applied to the wire is accordingly reduced. It will be received by the combustion cylinder and equipment. Therefore, the combustion catalyst does not significantly deform or fall out of the combustion cylinder,
It is safely and securely held in the fuel chamber.

According to a seventh aspect of the present invention, a catalyst is carried on a strip-shaped metal foil, and a combustion catalyst formed by winding the catalyst in multiple layers is disposed in a combustion cylinder. A combustion catalyst comprising: a support grid provided with an arc-shaped notch groove; and a plurality of wires stretched between the inner surfaces of the combustion cylinders downstream of the combustion catalyst so as to be engaged with the notch groove. It is a holding device. As in the sixth embodiment, this combustion catalyst holding device uses a support grid to prevent excessive deformation of the combustion catalyst, but locks the wire in a cutout groove formed in the support grid. Therefore, the wire is securely locked by the support grid, and even if the pressure of the mixed gas stream is applied to the combustion catalyst, the support grid suppresses the axial movement of the entire combustion catalyst. Accordingly, the load applied to the wire is received by the combustion cylinder. Therefore, the combustion catalyst is safely and securely held in the fuel chamber without being greatly deformed or falling out of the combustion cylinder.

In an eighth aspect of the present invention, a catalyst is carried on a strip-shaped metal foil, and a combustion catalyst formed by winding the catalyst in multiple layers is disposed in a combustion cylinder, and a rear surface is provided downstream of the combustion catalyst. A combustion catalyst holding device, wherein a spherical grid-like support grid is disposed, and a plurality of wire meshes are stretched between the inner surfaces of the combustion cylinders downstream of the combustion catalyst so as to be in close contact with the spherical surface. is there. This combustion catalyst holding device uses a support grid to prevent excessive deformation of the combustion catalyst, as in the seventh embodiment. However, the rear surface of the support grid is formed into a spherical surface, and the same shape as the spherical surface is used. Since the wire mesh formed into a spherical shape is adhered to the support mesh, the wire mesh is securely locked by the support grid, and even if the pressure of the mixed gas flow is applied to the combustion catalyst, the support grid forms the entire axis of the combustion catalyst. The movement in the direction is suppressed, and accordingly the load on the wire is received by the combustion cylinder. Therefore, the combustion catalyst is safely and securely held in the fuel chamber without being greatly deformed or falling out of the combustion cylinder.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment relating to a combustion catalyst holding apparatus according to the present invention will be described with reference to the accompanying drawings, but this embodiment does not limit the present invention. FIG. 1 is a vertical sectional side view showing a first embodiment of a combustion catalyst holding device according to the present invention. Reference numeral 10 denotes a combustor outer cylinder of the gas turbine, and 11 denotes a U-shaped head to which a combustion injection nozzle (not shown) is attached and connected to an upstream end of the combustor outer cylinder 10.
A combustion cylinder 12 is installed concentrically with the combustor outer cylinder 10 within the combustor outer cylinder 10, and an upstream end of the combustion cylinder 12 is installed concentrically within the head 11 via a spacer 13. The supply tube 14 is fitted and fixed to the outer wall of the peripheral portion, and the downstream end is fitted and fixed to the peripheral outer wall of the upstream end of the cylindrical combustor body 15 to constitute a combustion catalyst holding device 16. In the combustion cylinder 12 of this combustion catalyst holding device, for example, as shown in FIG.
A washcoat [SiO ₂ (5% by weight) -ZrO ₂ ] is applied to one surface of a stainless steel foil having a width of 50.8 mm, and a corrugated band-shaped metal foil 1 on which palladium particles as a platinum group metal are supported is placed. A combustion catalyst 5, which is folded and multiplexed in the width direction and in which catalyst passages 3 and non-catalyst passages 4 are alternately formed, is provided such that its peripheral surface is in contact with the inner surface of the combustion cylinder 12.

In the combustion cylinder 12 on the upstream side of the combustion catalyst 5,
A fuel / air mixer (hereinafter simply referred to as a mixer) 17 is provided, while a combustion catalyst holder 18 having a flame holding function is provided downstream of the combustion catalyst 5, and the mixer 17, the combustion catalyst 5. The members arranged in the order of the combustion catalyst holder 18 are bolts passing through the respective shaft pipes 17a, 5a, 18a.
The bolt 19 is integrally fixed by a nut 20 for fastening an end of the bolt 19. In FIG. 1, fuel is supplied from a fuel injection head to a supply cylinder 14 in the head 11, while air is supplied into the supply cylinder 14 through a passage on the outer periphery of the combustor body 15, the combustion cylinder 12, and the supply cylinder 14. The supplied fuel and air are mixed by the mixer 17 and flow into the combustion catalyst 5 to start combustion, and the combustion gas is flame-retained by the combustion catalyst holder 18 and enters the combustor body 15. Thus, the unburned fuel that has passed through the combustion catalyst 5 is burned.

In this fuel combustion, the combustion catalyst 5
The pressure of the mixed gas stream of fuel and air is always applied,
Even if the pressure is applied to the center of the combustion catalyst 5 and the combustion catalyst 5 attempts to deform in the axial direction, the combustion catalyst holder 18 in contact with or close to the combustion catalyst 5 completely prevents the deformation or prevents further deformation. I do. Accordingly, the pressure applied to the combustion catalyst 5 is borne by the combustion catalyst holder 18, and this load is applied to the low-temperature mixer fixed to the combustion cylinder 12 via bolts 19 and nuts 20 that are working with tensile force. You will receive it at 17. Therefore, the combustion catalyst 5 is not largely deformed in the combustion tube 12 or falls out of the combustion tube 12 without lowering of the beam effect of the combustion catalyst holder, and the combustion catalyst 5 is safely and reliably held in the combustion chamber.

FIG. 2 shows a second embodiment of the combustion catalyst holding device according to the present invention, and FIG.
FIG. 2b is a longitudinal sectional front view. This embodiment relates to an improvement of the first embodiment, and the same members as those of the first embodiment are denoted by the same reference numerals and the description thereof will be omitted. A gas rectifier 43 having a space upstream of the combustion catalyst 5 in the same combustion tube 12 as in the first embodiment and having a periphery fixed to the inner wall of the combustion tube 12 by welding or the like.
A radial beam, which in this embodiment is a cross beam 21 functioning as a combustion catalyst holder, is provided downstream of the combustion catalyst 5.
And a front end of the beam 21 is engaged with a notch of a notch ring (not shown) provided at a rear end of the combustion tube 12, and the gas rectifier 43, the combustion catalyst 5, and the cross shape are arranged from the upstream side. Each member arranged in the order of the beam 21 (combustion catalyst holder) of the
The combustion catalyst holding device 23 is integrally fixed by a bolt 19 passing through a, 5a, 21a and a nut 20 for fastening an end of the bolt 19. The combustion catalyst 5 of the combustion catalyst holding device 23 is prevented from moving in the axial direction by the cross-shaped beam 21 even when the pressure of the mixed gas flow of fuel and air is applied. The deformation of the combustion catalyst 5 is completely prevented, or further deformation is prevented. Similarly, the load applied to the beam 21 is received by the low-temperature side gas rectifier 43 fixed to the combustion cylinder 12 via the bolt 19 and the nut 20 that are working on tensile force. Therefore, the combustion catalyst 5 is not largely deformed in the combustion cylinder 12 and does not fall out of the combustion cylinder 12, and is held safely and securely in the combustion chamber.

FIG. 3 is a schematic view showing a third embodiment of the combustion catalyst holding device according to the present invention.
The same members as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. The same mixer 17 as that of the first embodiment is provided on the upstream side of the combustion catalyst 5 in the same combustion cylinder 12 as the first embodiment, and the same combustion catalyst holder 18 as that of the first embodiment is also provided on the downstream side. The member is each shaft core pipe
17a, 5a, 18a are integrally fixed by a bolt 19 passing through and a nut 20 for fastening an end of the bolt 19, and the combustion cylinder
The combustion catalyst holding device 25 is housed in the inside 12. The downstream end of the combustion cylinder 12 is bent inward and formed into a U-shape, and the rear end portion 18b of the combustion catalyst holder 18 is fitted and locked in the U-shaped formed portion 24. As in the first embodiment, the deformation of the combustion catalyst 5 is prevented by the combustion catalyst holder 18, and the pressure applied to the combustion catalyst holder 18 is reduced by the rear end 18.
From b, the process shifts to the combustion cylinder 12, and the combustion catalyst 5 is held by the entire combustion cylinder 12. Therefore, the combustion catalyst 5 is more safely and reliably held in the combustion chamber.

FIG. 4 is a schematic view showing a fourth embodiment of the combustion catalyst holding device according to the present invention.
The same members as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. In the combustion catalyst holding device 28 of the present embodiment, the same mixer 17 as in the first embodiment is disposed upstream of the combustion catalyst 5 in the same combustion cylinder 12 as in the first embodiment, and the mixer 17 and the combustion catalyst A combustion air introduction pipe 26 whose downstream end face is closed is screwed into the center of the combustion catalyst 5 so as to pass through the shaft pipe 5 a of the combustion catalyst 5, and the pipe 26 passes through the outer wall downstream of the pipe 26. A radial combustion air introduction pipe beam 27 is provided to extend through the combustion tube 12 and hold a rear surface of the combustion catalyst 5.

In this combustion catalyst holding device 28, even if the pressure of the mixed gas of fuel and air is applied to the combustion catalyst 5, the radial combustion air introduction pipe beam 27 holds the entire combustion catalyst 5 and moves in the axial direction. Deformation is prevented. The load applied to the beam 27 is received by the mixer 17 on the low temperature side and the combustion tube 12 to which the beam 27 is connected via a combustion air introduction pipe 26 at the center of the shaft where a tensile force acts. Therefore, the combustion catalyst 5 is not largely deformed in the combustion cylinder 12 and does not fall out of the combustion cylinder 12, and is held safely and securely in the combustion chamber. Further, in the combustion catalyst holding device 28, a part of the combustion air passing through the outer peripheral side enters the radial combustion air introduction pipe beam 27, passes through the combustion air introduction pipe 26, and the mixer 17
Pipe beams that are exposed to combustion gases
27 is cooled and thermal fatigue is suppressed.

FIG. 5 is a schematic view showing a fifth embodiment of the combustion catalyst holding apparatus according to the present invention. FIG. 5A is a vertical sectional side view showing a state in which the combustion catalyst is slightly deformed, and FIG. 5B is a vertical sectional front view thereof. It is. This embodiment relates to an improvement of the first embodiment, and the same members as those of the first embodiment are denoted by the same reference numerals and the description thereof will be omitted. In the combustion catalyst holding device 45 of the present embodiment, the same mixer 17 as in the first embodiment is disposed upstream of the combustion catalyst 5 in the same combustion cylinder 12 as in the first embodiment.
A plurality of wires 44 intersect between the inner surfaces of the combustion cylinders 12 on the downstream side of
Are loosened and each wire end is welded to the inner surface of the combustion tube 12 so that each wire 44 contacts or comes close to the downstream surface of the combustion catalyst 5. In the combustion catalyst holding device 45, when a large pressure of the mixed gas of fuel and air is applied to the combustion catalyst 5, the center of the combustion catalyst 5 is pushed to the downstream side as shown in FIG. . The combustion catalyst 5 comes into contact with the wire 44 and deforms until the wire 44 becomes taut in an arc shape as shown in FIG.
Thereby, further deformation is prevented. The load applied to the wire 44 is transmitted to the combustion cylinder 12 having sufficient strength.

FIG. 6 is a schematic view showing a sixth embodiment of the combustion catalyst holding device according to the present invention. FIG. 6A is a vertical sectional side view showing a state in which the combustion catalyst is slightly deformed, and FIG. 6B is a vertical sectional front view thereof. It is. This embodiment relates to an improvement of the fifth embodiment, and the same members as those of the fifth embodiment are denoted by the same reference numerals and description thereof will be omitted. In the combustion catalyst holding device 31 of the present embodiment, the same mixer 17 as in the fifth embodiment is disposed upstream of the combustion catalyst 5 in the same combustion cylinder 12 as in the fifth embodiment. Rod 29 penetrates through the center of the shaft of
Is connected to the center of the front surface of the mixer 17. A plurality of wires 30 are slackened and stretched between the rear end of the rod 29 and the inner surface of the combustion tube 12, and each wire end is welded to the inner surface of the combustion tube 12, so that each wire 30 5 is in contact with or close to the downstream surface. In the combustion catalyst holding device 31, when a large pressure of the mixed gas of fuel and air is applied to the combustion catalyst 5, the combustion cylinder 12 and the rod
The central portion of the combustion catalyst 5 between 29 may be pushed to the downstream side and may be slightly deformed. The combustion catalyst 5 comes into contact with the wire 30 and deforms until the wire 30 is tensioned in an arc shape as shown in the figure. However, the wire 30 prevents further deformation and holds the wire 30 safely and securely in the combustion chamber. Is done. The load applied to the wire 30 is transmitted to the combustion tube 12 having sufficient strength.

FIG. 7 is a schematic view showing a seventh embodiment of the combustion catalyst holding device according to the present invention. This embodiment relates to an improvement of the sixth embodiment, and is the same as that of the sixth embodiment. Are denoted by the same reference numerals and description thereof is omitted. In the combustion catalyst holding device 34 of the present embodiment, the same mixer 17 as in the sixth embodiment is disposed upstream of the combustion catalyst 5 in the same combustion cylinder 12 as in the sixth embodiment. Rod 29 in the center of the shaft
And the tip of the rod 29 is connected to the center of the front surface of the mixer 17. At the rear end of the rod 29, a support grid 32 having a substantially arc-shaped notch groove 33 is installed, and a plurality of wires 30 are provided between the rear end of the rod 29 and the inner surface of the combustion cylinder 12. It is stretched so as to pass through the notch groove 33. In the combustion catalyst holding device 34, when a large pressure of a mixed gas of fuel and air is applied to the combustion catalyst 5, the combustion cylinder 12
The central portion of the combustion catalyst 5 between the rod and the rod 29 may be extruded downstream and slightly deformed. This combustion catalyst 5 comes into contact with the support grid 32 to prevent axial deformation,
The load applied to the wire 30 is received by the mixer 17 via the rod 29 and the combustion cylinder 12 via the wire 30. Therefore, the combustion catalyst 5 is safely and reliably held in the combustion chamber without being deformed or falling out of the combustion tube 12.

FIG. 8 is a schematic view showing an eighth embodiment of the combustion catalyst holding apparatus according to the present invention. FIG. 8A is a vertical sectional side view showing a state where the combustion catalyst is slightly deformed, and FIG. 8B is a vertical sectional front view thereof. It is. This embodiment relates to an improvement of the fifth embodiment, and the same members as those of the fifth embodiment are denoted by the same reference numerals and description thereof will be omitted. In the combustion catalyst holding device 37 of the present embodiment, the same mixer 17 as in the fifth embodiment is disposed upstream of the combustion catalyst 5 in the same combustion cylinder 12 as in the fifth embodiment. A grid-like support grid 35 is installed on the inner surface of the combustion cylinder 12 downstream of the combustion catalyst 5, and on the rear surface of the support grid 35,
A substantially arc-shaped notch groove 36 is formed vertically and horizontally, and this notch groove is formed.
A wire whose both ends are welded to the inner surface of the combustion cylinder 12 along 36
30 have been installed. In the combustion catalyst holding device 37, when a large pressure of the mixed gas of fuel and air is applied to the combustion catalyst 5, the center of the combustion catalyst 5 may be pushed out downstream and may be slightly deformed. The combustion catalyst 5 comes into contact with the support grid 35 to prevent deformation in the axial direction, and the load applied to the wire 30 is received by the entire combustion cylinder 12 via the wire 30. Therefore, the combustion catalyst 5 is deformed or the combustion tube 12
It is safely and securely held in the combustion chamber without falling out of the combustion chamber. The shape of the support grid 35 is not limited to the illustrated one, and various shapes can be selected.
If the wire 30 is provided with a projection or the like in the notch groove 36 which can be caught on the side near the center of the support grid 35, deformation of the support grid 35 can be prevented, which is more effective.

FIG. 9 is a schematic view showing a ninth embodiment of the combustion catalyst holding device according to the present invention. FIG. 9a is a vertical sectional side view showing a state where the combustion catalyst is slightly deformed, and FIG. 9b is a vertical sectional front view thereof. It is. This embodiment relates to an improvement of the eighth embodiment, and the same members as those of the eighth embodiment are denoted by the same reference numerals and description thereof will be omitted. In the combustion catalyst holding device 42 of the present embodiment, the same mixer 17 as in the eighth embodiment is disposed upstream of the combustion catalyst 5 in the same combustion cylinder 12 as in the eighth embodiment. A grid-like support grid 35 having a rear surface of a spherical surface 38 is provided on the inner surface of the combustion cylinder 12 downstream of the combustion catalyst 5, and the spherical surface 38 of the support grid 35 has a wire mesh formed into a spherical shape.
The wire mesh 39 is installed in a tightly contacted state, and the periphery of the wire mesh 39 is inserted into a bent U-shaped portion 41 of a bent tube portion 40 formed by bending the rear end of the combustion tube 12 inward and welding. doing. In the combustion catalyst holding device 42, when a large pressure of the mixed gas of fuel and air is applied to the combustion catalyst 5, the central portion of the combustion catalyst 5 may be pushed out downstream and may be slightly deformed. The combustion catalyst 5 contacts the support grid 35 to prevent deformation in the axial direction, and the load applied to the wire mesh 39 is received by the entire combustion cylinder 12 via the wire mesh 39. Accordingly, the combustion catalyst 5 may be deformed or burnt.
It is safely and securely held in the combustion chamber without falling out of the cylinder 12. If the wire mesh 39 is welded at a point where the wires cross each other, the wires do not shift, which is more effective.

[0031]

According to the present invention, basically, a catalyst is carried on a strip-shaped metal foil, and a combustion catalyst formed by winding the catalyst in multiple layers is arranged in a cylinder, and the combustion catalyst is held by a combustion catalyst holder on the downstream side. A combustion catalyst holding device characterized in that the combustion catalyst is held and deformation thereof is prevented. According to the present invention, even in the case of a large-diameter combustion catalyst, the entire axial movement can be suppressed, and the resulting load can be received by the combustion cylinder, so that the combustion catalyst can fall out of the combustion cylinder or be excessively deformed. And is securely and securely held in the fuel chamber.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing a first embodiment of a combustion catalyst holding device according to the present invention.

2 shows a second embodiment of the combustion catalyst holding device according to the present invention, wherein FIG. 2a is a longitudinal side view and FIG. 2b is a longitudinal front view.

FIG. 3 is a vertical sectional side view showing a third embodiment of the combustion catalyst holding device according to the present invention.

FIG. 4 is a vertical sectional side view showing a fourth embodiment of the combustion catalyst holding device according to the present invention.

5A and 5B show a fifth embodiment of the combustion catalyst holding device according to the present invention. FIG. 5A is a vertical sectional side view in a state where the combustion catalyst is slightly deformed, and FIG. 5B is a vertical sectional front view thereof.

6A and 6B show a sixth embodiment of the combustion catalyst holding device according to the present invention, wherein FIG. 6A is a longitudinal sectional side view in a state where the combustion catalyst is slightly deformed, and FIG. 6B is a longitudinal sectional front view thereof.

FIG. 7 is a longitudinal sectional side view showing a seventh embodiment of the combustion catalyst holding device according to the present invention.

8A and 8B show an eighth embodiment of the combustion catalyst holding device according to the present invention. FIG. 8A is a longitudinal side view showing a state in which the combustion catalyst is slightly deformed, and FIG. 8B is a longitudinal sectional front view thereof.

9 shows a ninth embodiment of the combustion catalyst holding device according to the present invention, wherein FIG. 9a is a longitudinal side view in a state where the combustion catalyst is slightly deformed, and FIG. 9b is a longitudinal front view thereof.

10 is a diagram showing a corrugated band-shaped metal foil carrying a catalyst on one surface, FIG. 10a is a plan view thereof, and FIG. 10b is a side view thereof.

11 is a diagram showing a combustion catalyst formed by winding the belt-shaped metal foil of FIG. 10 in multiple layers.

12 shows a deformed state of the combustion catalyst of FIG. 11, and FIG.
12A is a schematic diagram showing a state before deformation, and FIG.

[Description of Signs] 1 ... Strip-shaped metal foil 2 ... Catalyst 3 ... Catalyst passage 4 ... Non-catalyst passage 5 ... Combustion catalyst 5a ... Shaft core pipe 10 ... Outside the combustor Cylinder 11 ・ ・ ・ Head 12 ・ ・ ・ Combustion cylinder 13 ・ ・ ・
Spacer 14 ・ ・ ・ Supply tube 15 ・ ・ ・ Combustor body 16
・ ・ ・ Combustion catalyst holding device 17 ・ ・ ・ Mixer 17a ・ ・ ・
Shaft core pipe 18: Combustion catalyst holder 18a: Shaft core pipe 18b: Rear end 19 ... Bolt 20 ...
Nut 21 ・ ・ ・ Beam 23 ・ ・ ・ Combustion catalyst holding device 24 ・
..U-shaped molding part 25 ... combustion catalyst holding device 26
・ Combustion air introduction pipe 27 ・ ・ ・ Combustion air introduction pipe beam 28 ・ ・ ・ Combustion catalyst holding device 29 ・ ・ ・ Rod 30
・ ・ ・ Wire 31 ・ ・ ・ Combustion catalyst holding device 32 ・ ・ ・ Support grid 33 ・ ・ ・ Notch groove 34 ・ ・ ・ Combustion catalyst holding device 35 ・ ・ ・ Support grid 36 ・ ・ ・ Notch groove
37: combustion catalyst holding device 38: spherical surface 39: wire mesh 40: bent cylinder 41: bent U
L-shaped part 42: combustion catalyst holding device 43: gas rectifier 44: wire 45: combustion catalyst holding device

Claims (16)

[Claims] 1. A catalyst is carried on a strip-shaped metal foil, and a combustion catalyst formed by winding the catalyst in multiple layers is disposed in a combustion cylinder. The combustion catalyst is held by an upstream device and a downstream combustion catalyst holder. A combustion catalyst holding device, wherein the device, the combustion catalyst and the combustion catalyst holder are fastened by a tensile member penetrating them. 2. A catalyst is carried on a strip-shaped metal foil, and a combustion catalyst formed by winding the catalyst in multiple layers is disposed in a combustion cylinder. The combustion catalyst is held by an upstream device and a downstream combustion catalyst holder. Holding the device, the combustion catalyst and the combustion catalyst holder with a tension member penetrating them, and further bending the rear end of the combustion catalyst holder with the rear end of the combustion cylinder inward. A combustion catalyst holding device, wherein the combustion catalyst holding device is fixed to the combustion cylinder by being locked to a stop portion. A catalyst is carried on a strip-shaped metal foil, and a combustion catalyst formed by winding the catalyst in multiple layers is disposed in a combustion cylinder, and penetrates from a downstream side of the combustion catalyst to an upstream side of the combustion catalyst. A plurality of combustion air that reaches an upstream side of the device and has a downstream end closed, and a plurality of combustion airs penetrating a peripheral wall near a closed end of the combustion air introduction pipe and reaching the outside of the combustion cylinder. A combustion catalyst holding device, wherein the combustion pipe and the combustion air introduction pipe communicate with each other by an introduction pipe beam, and a downstream surface of the combustion catalyst is held by the combustion air introduction pipe beam. 4. A catalyst is carried on a strip-shaped metal foil, a combustion catalyst formed by winding the catalyst in multiple layers is disposed in a combustion cylinder, and a plurality of wires are stretched on an inner surface of the combustion cylinder downstream of the combustion catalyst. A combustion catalyst holding device, characterized in that: A catalyst is carried on a strip-shaped metal foil, and a combustion catalyst formed by winding the catalyst in multiple layers is disposed in a combustion cylinder, and penetrates from a downstream side of the combustion catalyst to an upstream side of the combustion catalyst. A combustion catalyst holding device, wherein a plurality of wires are stretched between a downstream side of the combustion catalyst of a tension member fixed to equipment and an inner surface of the combustion cylinder. 6. A catalyst is carried on a strip of metal foil, a combustion catalyst formed by winding the catalyst in multiple layers is disposed in a combustion cylinder, and a support grid in which a cutout groove is formed downstream of the combustion catalyst is disposed. And a plurality of wires formed between the downstream side of the combustion catalyst and the inner surface of the combustion cylinder of a tension member that penetrates from the downstream side of the combustion catalyst and is fixed to a device on the upstream side of the combustion catalyst. A combustion catalyst holding device stretched through a groove. 7. A catalyst is carried on a strip-shaped metal foil, and a combustion catalyst formed by winding the catalyst in multiple layers is disposed in a combustion cylinder, and a notch groove having a substantially vertical and horizontal arcuate shape is formed downstream of the combustion catalyst. A combustion catalyst holding device, wherein a support grid is provided, and a plurality of wires are stretched between the inner surfaces of the combustion cylinders downstream of the combustion catalyst so as to be engaged with the notched grooves. 8. A catalyst supported on a strip-shaped metal foil, a combustion catalyst formed by winding the catalyst in multiple layers is disposed in a combustion cylinder, and a lattice-shaped support having a spherical rear surface is provided downstream of the combustion catalyst. A combustion catalyst holding device, wherein a grid is provided, and a plurality of wire meshes are stretched between the inner surfaces of the combustion cylinders downstream of the combustion catalyst so as to be in close contact with the spherical surface. 9. The combustion catalyst holding device according to claim 1, wherein the strip-shaped metal foil constituting the combustion catalyst has a corrugated shape. 10. The combustion catalyst holding device according to claim 1, wherein the device located upstream of the combustion catalyst has a gas rectification capability. 11. The combustion catalyst holding device according to claim 1, wherein the device located upstream of the combustion catalyst has a gas mixing ability. 12. The combustion catalyst according to claim 1, wherein the combustion catalyst holder forms a radial beam in the combustion cylinder, and a tip of the beam is fixed downstream of the combustion catalyst in the combustion cylinder. Holding device. 13. The combustion catalyst holding device according to claim 1, wherein the combustion catalyst holding tool has a flame holding function. 14. The combustion catalyst holding device according to claim 1, wherein the tension member is a bolt and a nut. 15. The combustion catalyst holding device according to claim 2, wherein the locking portion is U-shaped. 16. The combustion catalyst holding device according to claim 1, wherein the combustion catalyst has a catalyst passage and a non-catalyst passage.