JP2021105468A - Supporting structure of shock wave type soot blower - Google Patents

Abstract

To reduce a space behind a shock wave type soot blower.SOLUTION: A structure supporting a shock wave type soot blower (1) is equipped with the shock wave type soot blower (1) in which a nozzle (13) penetrating a wall (15) of a device (7) installed with the shock wave type soot blower (1) can be attached/detached to/flow a soot blower body (11), and a supporting rail (37) movably supporting the soot blower body (11). The supporting rail (37) is extended from a permanent position where the soot blower body (11) and the nozzle (13) are united in a direction deviating from an axis (C) of the nozzle (13) and approaching the wall (15) in a plane view, and is attached to the wall (15) at an end portion (37a) in an extending direction.SELECTED DRAWING: Figure 4

Description

The present invention relates to a structure that supports a shock wave type soot blower.

Conventionally, for a device such as a boiler, a shock wave type soot blower has been used to remove dust adhering to the surface of the device (for example, a heat exchanger such as a superheater or an economizer) constituting the device. (See, for example, Patent Document 1). This shock wave type soot blower is configured to burn an air-fuel mixture containing an oxidant gas such as fuel gas and oxygen to generate a shock wave, and then emit the shock wave into the internal space of the apparatus. This shock wave removes dust from the surface of the equipment inside the device.

Generally, in a shock wave type soot blower, nozzles penetrating the wall of the device are configured to be detachable from the soot blower body, and it is necessary to separate them when inspecting the shock wave type soot blower. Specifically, the soot blower body is first separated from the nozzle, and then the nozzle is pulled out from the wall.

Japanese Unexamined Patent Publication No. 2005-172418

By the way, since the soot blower main body is heavier than the nozzle, the soot blower main body is supported so that the nozzle is not stressed by the weight of the soot blower main body at the time of assembly. Conventionally, it is common to hang the soot blower main body with a hanger from a rail attached to a frame adjacent to a device such as a boiler.

In such a conventional support structure, the rail extends in the axial direction of the nozzle in order to allow the soot blower main body to reciprocate in the axial direction of the nozzle when the shock wave is output. By increasing the length of the rail to the rear (opposite the nozzle to the soot blower body), the soot blower body is separated from the nozzle and then the soot blower body is moved along the rail between the nozzle and the soot blower body. It is possible to secure a space for pulling out the nozzle and then pull out the nozzle from the wall. However, in such a support structure, a space for retracting the soot blower main body is required further behind the space for pulling out the nozzle.

Therefore, an object of the present invention is to provide a support structure capable of reducing the space behind the shock wave type soot blower in order to solve the above problems.

In order to achieve the above-mentioned object, the support structure of the shock wave type soot blower according to the present invention is provided.
A shock wave type soot blower in which a nozzle penetrating the wall of the device on which the shock wave type soot blower is installed can be attached to and detached from the soot blower body.
A support rail that movably supports the soot blower body and
With
The support rail is deviated from the permanent position where the soot blower main body and the nozzle are connected, deviates from the axial center of the nozzle in a plan view, and extends in a direction close to the wall. It is attached to the wall at the end in the extending direction.

According to this configuration, the support rail is displaced from the permanent position from the axial center of the nozzle and extends in a direction close to the wall, so that the soot blower main body is retracted to the space near the wall surface of the device. Can be made to. Further, since the end portion of the support rail having the above shape is directly attached to the wall of the device, the space in the front-rear direction can be reduced as compared with the case where the support rail is provided separately. Therefore, it is possible to significantly reduce the space required behind the impact type soot blower.

In the support structure of the shock wave type soot blower according to the embodiment of the present invention, the device may be a boiler. According to this configuration, even if the nozzle installation position is displaced due to the thermal expansion of the boiler operated at high temperature, the support rail is integrally provided on the boiler wall, so the nozzle installation position and the position of the soot blower body There is no displacement.

In the support structure of the shock wave type soot blower according to the embodiment of the present invention, an auxiliary support member for supporting the rail to the wall may be further provided. According to this configuration, by providing the auxiliary support member on the device side, the soot blower main body can be supported more firmly without increasing the space behind the shock wave type soot blower.

As described above, according to the present invention, it is possible to reduce the space required behind the shock wave type soot blower.

It is a side view which shows an example of the apparatus which installed the shock wave type soot blower to which the support structure which concerns on one Embodiment of this invention is applied. It is a top view which shows by breaking a part of the shock wave type soot blower to which the support structure which concerns on one Embodiment of this invention is applied. It is a side view which shows the shock wave type soot blower of FIG. 2 and its support structure. It is a top view which shows the shock wave type soot blower of FIG. 2 and its support structure partially broken. It is a top view which shows the operation of the shock wave type soot blower to which the support structure of FIG. 4 is applied. It is a top view which shows typically one modification of the support structure of the shock wave type soot blower of FIG. It is a top view which shows another modification of the support structure of the shock wave type soot blower of FIG. 4 schematically.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings, but the present invention is not limited to this embodiment.

FIG. 1 shows a waste incinerator 3 in which a shock wave type soot blower (hereinafter, simply referred to as “soot blower”) 1 to which the support structure according to the embodiment of the present invention is applied is installed. In the waste incinerator 3, waste is incinerated in the combustion chamber, and the high-temperature exhaust gas G generated by the incinerator passes through the flue 5 connected to the downstream of the combustion chamber. The flue 5 is provided with a boiler 7 that generates steam by utilizing the heat of the exhaust gas G flowing through the flue 5. The soot blower 1 is a device that outputs a shock wave. For example, dust that is installed in a device such as the boiler 7 and adheres to the surface of a heat exchanger (for example, a superheater, an economizer, etc.) 9 that constitutes the boiler 7. To remove.

FIG. 2 shows a schematic configuration of the soot blower 1 according to the embodiment of the present invention. In the figure, the support structure of the soot blower 1 is omitted. The soot blower 1 outputs a shock wave SP by burning a mixture of a fuel gas and an oxidant gas and discharging the combustion gas B generated thereby. In this embodiment, methane gas is used as the fuel gas and oxygen gas is used as the oxidant gas. However, the fuel gas and the oxidant gas are not limited to these.

The soot blower 1 includes a soot blower main body 11 and a nozzle 13 protruding from the soot blower main body 11. The nozzle 13 penetrates the wall of the device (in this example, the wall of the flue 5 constituting the boiler 7) 15. In the following description, for convenience, the wall 15 side in the axial direction C direction of the nozzle 13 is referred to as the front, and the opposite side thereof is referred to as the rear.

The soot blower body 11 has a housing 17 and a cylinder 19 containing a piston (not shown), and a connecting pipe 21 extending from the housing 17 in the direction opposite to the cylinder 19. The nozzle 13 is detachably connected to the soot blower main body 11 via the connecting pipe 21. Further, the soot blower main body 11 has a pair of combustion chambers 23 extending from both sides of the housing 17 so as to be orthogonal to the axial center C direction of the nozzle 13.

A valve unit 25 shown in FIG. 3 is attached to the housing 17, and a fuel gas storage chamber and an oxidant gas storage chamber (not shown) are connected to both sides of the valve unit 25. The fuel gas and the oxidant gas filled in each storage chamber are supplied into the combustion chamber 23 via the valve unit 25. The air-fuel mixture of the fuel gas and the oxidant gas is burned in the combustion chamber 23, and the combustion gas B generated by the combustion is discharged from the nozzle 13, so that the shock wave SP is output. The shock wave SP is output to the internal space S of the boiler 7 through the nozzle 13.

In the present embodiment, as shown in FIG. 2, a fixing pipe 29 is provided in the through hole 27 formed in the wall 15 so as to project rearward from the wall 15. The nozzle 13 is fixed to the fixed pipe 29 in a state of being inserted into the fixed pipe 29 fixed to the through hole 27. However, the nozzle 13 may be directly fixed to the through hole 27 of the wall 15.

The nozzle 13 is configured to allow the soot blower main body 11 to reciprocate in the axial direction C direction of the nozzle 13 when the shock wave SP is output. Specifically, the nozzle 13 is provided with four nozzle flanges 31, and springs 33 are arranged between the three nozzle flanges 31 behind them. The nozzle flange 31 located at the foremost position is fastened to the fixing flange 35 provided at the rear end of the fixing pipe 29 by bolts and nuts (not shown).

Hereinafter, the support structure of the soot blower 1 configured in this manner will be described in detail. As shown in FIG. 3, in the present embodiment, the soot blower main body 11 of the soot blower 1 is movably supported by a support rail 37 attached to the wall 15 of the boiler 7. That is, the soot blower 1 is supported by the wall 15 of the boiler 7 via the support rail 37.

As shown in FIG. 4, the support rail 37 is the axis of the nozzle 13 in a plan view from a position where the soot blower main body 11 and the nozzle 13 are connected (this position is referred to as a “permanent position” in the present specification). It deviates from the center C and extends in a direction close to the wall 15. Further, the support rail 37 is attached to the wall 15 at the end portion 37a in the extending direction. That is, the support rail 37 is attached to the wall 15 at a position deviated from the axial center C of the nozzle 13 in a plan view. Therefore, the soot blower main body 11 is supported by the support rail 37 so as to deviate from the axial center C of the nozzle 13 in a plan view and to move to a position closer to the wall 15 than the permanent position.

Specifically, in the illustrated example, the support rail 37 is formed in an arch shape that curves forward from both sides of the permanent position in a plan view, and both ends 37a and 37a of this arch shape are formed on the wall 15. It is directly attached.

In the present embodiment, the soot blower main body 11 is movably supported by the support rail 37 by being suspended from the support rail 37 by the hanger 39. By moving the hanger 39 along the support rail 37, the soot blower main body 11 is moved between the permanent position and the retracted position shown in FIG. 5 separated from the nozzle 13. More specifically, the hanger 39 of FIG. 3 is provided at the hanger main body 43 having the roller 41 rolling on the guide surface of the support rail 37, the hanging body 45 hanging from the hanger main body 43, and the lower end of the hanging body 45. It has a hook 47. The hook 47 is engaged with the U-shaped portion 49 provided on the upper surface of the housing 17 of the soot blower main body 11. However, the mode in which the soot blower main body 11 is movably supported by the support rail 37 is not limited to this example.

Further, the support structure according to the present embodiment includes an auxiliary support member 51 that supports the support rail 37 on the wall 15. Specifically, as shown in FIGS. 3 and 4, the auxiliary support member 51 includes a central portion (the portion most bulging rearward) of the support rail 37 corresponding to a permanent position and a nozzle 13 axial center on the wall 15. It is formed as a single rod-shaped member that connects the portion located above the C position.

The aspect of the auxiliary support member 51 is not limited to the illustrated example as long as it is configured to support the support rail 37 on the wall 15 (that is, to connect a part of the support rail 37 and the wall 15). For example, unlike the illustrated example, a plurality of rod-shaped members extending radially in a plan view may be provided as the auxiliary support member 51.

By providing the auxiliary support member 51 on the device side in this way, the soot blower main body 11 can be supported more firmly without increasing the space behind the soot blower 1. However, if the soot blower main body 11 can be firmly supported only by the support rail 37, the auxiliary support member 51 may be omitted.

The shape of the support rail 37 is deviated from the axial center C of the nozzle 13 in a plan view from the permanent position and extends in a direction close to the wall 15, and at the end in the extending direction. As long as it is mounted on the wall 15, it is not limited to the example described above. For example, the planar shape of the support rail 37 has an R shape in which the central portion (the portion that bulges backward most) corresponding to the permanent position bulges backward, as shown in FIG. 6A as a modified example. It may be formed in a substantially isosceles triangle shape as a whole, extending linearly from both sides toward the wall 15. Further, as shown in FIG. 6B as another modification, the two corners may be formed in a substantially rectangular shape having an R shape.

Further, unlike the example shown in FIG. 4, the support rail 37 is deviated from the axial center C of the nozzle 13 in a plan view and extends in a direction close to the wall 15 from only one side of the permanent position. , It may be attached to the wall 15 at one end in the extending direction.

In the present embodiment, the boiler 7 has been described as an example of the device in which the soot blower 1 is installed. If the above support structure is applied when the device is a boiler 7 operated at a high temperature, the support rail can be applied even if the installation position of the nozzle 13 (the position of the through hole 27 of the wall 15) is displaced due to the thermal expansion of the boiler 7. Since the 37 is integrally provided on the wall 15 of the boiler 7, there is no deviation between the installation position of the nozzle 13 and the position of the soot blower main body 11. However, the soot blower 1 to which the support structure according to the present embodiment is applied may be installed in a device other than the boiler 7.

According to the support structure of the shock wave type soot blower 1 according to the present embodiment described above, as shown in FIG. 5, the soot blower main body 11 can be retracted to a space near the wall 15 surface of the apparatus. Further, since the end portion of the support rail 37 having the above shape is directly attached to the wall 15 of the device, the space in the front-rear direction can be reduced as compared with the case where the support rail 37 is provided separately. Therefore, the space required behind the impact type soot blower 1 can be significantly reduced.

As described above, the preferred embodiment of the present invention has been described with reference to the drawings, but various additions, changes or deletions can be made without departing from the spirit of the present invention. Therefore, such things are also included within the scope of the present invention.

1 Shock wave type soot blower 7 Boiler (device)
11 Soot blower body 13 Nozzle 15 Device wall 37 Support rail 51 Auxiliary support member

Claims (3)

It has a structure that supports a shock wave type soot blower.
A shock wave type soot blower in which a nozzle penetrating the wall of the device on which the shock wave type soot blower is installed can be attached to and detached from the soot blower body.
A support rail that movably supports the soot blower body and
With
The support rail is deviated from the permanent position where the soot blower main body and the nozzle are connected, deviates from the axial center of the nozzle in a plan view, and extends in a direction close to the wall. Attached to the wall at the end in the extension direction,
Support structure of shock wave type soot blower. The shock wave type soot blower according to claim 1, wherein the support structure of the shock wave type soot blower in which the device is a boiler. The support structure of the shock wave type soot blower according to claim 1 or 2, further comprising an auxiliary support member for supporting the rail on the wall.

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