Support structure of a pressure wave type soot blower

Abstract

This invention provides a support structure for a pressure wave type soot blower that can prevent misalignment between the equipment and the pressure wave type soot blower even when the equipment in which the pressure wave type soot blower is installed experiences thermal expansion or cooling contraction. [Solution] A support structure 1 for a pressure wave type soot blower SB that supplies pressure waves into the apparatus through a through-hole penetrating the wall of the apparatus, comprising: a first support part 10 that supports the pressure wave type soot blower SB so that the axial direction of the nozzle N of the pressure wave type soot blower SB is parallel to the normal direction of the apparatus wall and is movable along the normal direction of the wall; and a second support part 20 that supports the first support part 10 so that it is movable along a direction perpendicular to the normal direction of the wall of the apparatus. Even if the wall of the apparatus expands and contracts, the position of the pressure wave type soot blower SB can be adjusted in accordance with the displacement of the wall of the apparatus, thereby reducing the risk of gas leakage due to misalignment between the nozzle N of the pressure wave type soot blower SB and the through-hole in the wall.

Description

Technical Field

[0001] The present invention relates to a support structure for a pressure wave soot blower. More specifically, the present invention relates to a support structure for a pressure wave soot blower, which adjusts the position of the pressure wave soot blower used for removing dust adhering to the inside of a device such as a waste heat boiler relative to the boiler or the like.

Background Art

[0002] Devices such as waste heat boilers internally have spaces through which high-temperature gases such as combustion gas and exhaust gas pass, so dust contained in the high-temperature gas adheres to the inner surface of the device. When this dust adheres and accumulates on the inner surface of the device, the heat of the high-temperature gas can no longer be effectively utilized. For example, in the case of a waste heat boiler, the recovery efficiency of thermal energy possessed by high-temperature exhaust gas decreases. Therefore, the dust adhering to the inner surface of the device needs to be removed periodically. To remove this dust, pressure wave soot blowers are provided in devices such as waste heat boilers.

[0003] A pressure wave soot blower comprises a soot blower main body having a combustion chamber that generates a shock wave by combusting an air-fuel mixture containing fuel gas and oxygen, and a nozzle that discharges the shock wave from the soot blower main body. The pressure wave soot blower is installed in a state where the position of a hole, which is provided in the wall of a waste heat boiler and communicates the outside and the inside, is aligned with the position of the opening at the tip of the nozzle of the pressure wave soot blower. Therefore, when the shock wave generated in the soot blower main body is supplied into the interior of a device such as a waste heat boiler through the nozzle and the through-hole, the dust adhering to the inner surface of the device can be removed by the shock wave.

Prior Art Literature

Patent Literature

[0004]

Patent Literature 1

Summary of the Invention

Problem to be Solved by the Invention

[0005] Incidentally, in devices such as waste heat boilers, high-temperature gas is supplied to the inside, causing the device to expand due to the heat of the high-temperature gas, and then, when the supply of high-temperature gas stops, the device cools and contracts. This results in a misalignment between the pressure wave type soot blower and the waste heat boiler or other device.

[0006] In the apparatus described in Patent Document 1, a pressure wave type soot blower (referred to as a shock wave soot blower in Patent Document 1) is provided so as to be able to move back and forth relative to the wall of the apparatus. Therefore, even if the apparatus expands and contracts in the axial direction of the nozzle, the pressure wave type soot blower moves relative to the wall of the apparatus. Consequently, even if the position of the pressure wave type soot blower and the position of the apparatus are misaligned in the axial direction of the nozzle due to the expansion and contraction of the apparatus, the misalignment can be absorbed by the movement of the pressure wave type soot blower. In other words, it is possible to maintain a state in which the position of the through hole and the position of the nozzle tip opening are aligned.

[0007] However, in the apparatus described in Patent Document 1, if a misalignment occurs between the soot blower body and equipment such as a waste heat boiler in a direction intersecting the axial direction of the nozzle, this misalignment cannot be compensated for. As a result, the position of the through-hole and the position of the nozzle tip opening become misaligned, leading to problems such as gas leaks.

[0008] In view of the above circumstances, the present invention aims to provide a support structure for a pressure wave type soot blower that can prevent misalignment between the device and the pressure wave type soot blower even when thermal expansion or cooling contraction occurs in the device on which the pressure wave type soot blower is installed. [Means for solving the problem]

[0009] The support structure for a pressure wave type soot blower of the first invention is a support structure for a pressure wave type soot blower that supplies a pressure wave into a device through a through hole that penetrates the wall of the device to which a high-temperature gas is supplied, and is characterized by comprising: a first support part that supports the pressure wave type soot blower so that the axial direction of the nozzle of the pressure wave type soot blower is parallel to the normal direction of the wall of the device and is movable along the normal direction of the wall; and a second support part that supports the first support part so that it is movable along a direction perpendicular to the normal direction of the wall of the device. The support structure for the pressure wave type soot blower of the second invention is characterized in that, in the first invention, the wall of the apparatus has a vertical outer surface, and the second support part supports the pressure wave type soot blower so that it can move along the outer surface of the wall of the apparatus in a horizontal direction parallel to the outer surface. The support structure for a pressure wave type soot blower of the third invention is characterized in that, in the second invention, the second support portion comprises a base support portion having a horizontal upper surface and a movable portion that moves parallel to the outer surface of the wall of the device along the upper surface of the base support portion to which the first support portion is connected. The support structure for the pressure wave type soot blower of the fourth invention is characterized in that, in the third invention, the base support portion is provided with an elongated hole that penetrates between its upper and lower surfaces and extends in a direction parallel to the outer surface of the wall of the device, and the movable portion comprises a connecting shaft whose lower end is connected to the first support portion and whose upper end is inserted through the elongated hole in the base support portion and protrudes upward from the upper surface of the base support portion, and a movable member provided at the upper end of the connecting shaft that moves along the upper surface of the base support member. The support structure for the pressure wave type soot blower of the fifth invention is characterized in that, in the first invention, the device has a flow path section extending along the horizontal direction through which high-temperature gas passes, and the through hole is provided in the vertical wall of the flow path section. [Effects of the Invention]

[0010] According to the first and second inventions, even if the walls of the apparatus expand and contract, the position of the pressure wave type soot blower can be adjusted to match the displacement of the apparatus walls. This reduces the risk of gas leakage and other problems caused by misalignment between the nozzle of the pressure wave type soot blower and the penetration hole in the wall. According to the third and fourth inventions, the configuration for moving the pressure wave type soot blower can be simplified. According to the fifth invention, even if the flow path section of the device expands or contracts horizontally, the position of the soot blower can be adjusted to match the amount of displacement of the wall of the flow path section. [Brief explanation of the drawing]

[0011] [Figure 1] This is a schematic diagram illustrating the support structure 1 of the pressure wave type soot blower SB of this embodiment. [Figure 2] This is a cross-sectional view taken along line II-II in Figure 1. [Figure 3] This is a schematic diagram of the second support section 20, where (A) is a schematic side view, (B) is a schematic cross-sectional view of (A) along line BB, and (C) is a schematic cross-sectional view of (A) along line BB showing the state in which the pressure wave type soot blower SB has moved from the reference position BY. [Figure 4] This diagram provides a schematic explanation of the movement of the pressure wave type soot blower SB by the support structure 1 of the pressure wave type soot blower SB of this embodiment, where (A) shows the state in which the pressure wave type soot blower SB is positioned at the reference position BY, and (B) shows the movement of the pressure wave type soot blower SB when the flow path FP of the waste heat boiler B is thermally expanded. [Figure 5] This is a schematic diagram of a waste heat boiler B in which a pressure wave type soot blower SB is supported by the support structure 1 of the pressure wave type soot blower SB of this embodiment. [Modes for carrying out the invention]

[0012] The support structure for the pressure wave type soot blower of this embodiment is a support structure for the pressure wave type soot blower used when installing the pressure wave type soot blower in a device such as a waste heat boiler, and is designed to prevent misalignment between the pressure wave type soot blower and the device even when the device expands and contracts due to heat.

[0013] The support structure for the pressure wave type soot blower of this embodiment allows for the installation of a pressure wave type soot blower in any device where high-temperature gas is supplied and dust or the like adheres to the inner surface of the device; it is not particularly limited. For example, it can be used in non-ferrous metal smelting to recover the thermal energy of high-temperature exhaust gas discharged from smelting furnaces such as self-smelting furnaces, such as waste heat boilers or superheaters. The following description will primarily illustrate an example in which a pressure wave type soot blower is installed in a waste heat boiler using the support structure of this embodiment.

[0014] <Support structure 1 of the pressure wave type soot blower SB of this embodiment> As shown in Figure 5, the support structure 1 of the pressure wave type soot blower SB of this embodiment (hereinafter sometimes simply referred to as the support structure 1 of this embodiment) is installed in the waste heat boiler B. In Figure 5, the symbol FP indicates the flow path through which the high-temperature gas supplied to the waste heat boiler B flows. The flow path FP has a side wall W whose outer surface S1 is a vertical surface (see Figure 1). In this waste heat boiler B, the high-temperature gas that has passed through the flow path FP is discharged to the outside from the exhaust flow path EX. Also, as shown in Figure 1, a through hole Wh is formed in the side wall W that penetrates the side wall W. A box-shaped manhole M is provided on the outer surface S1 of the side wall W so as to cover the through hole Wh, and a through hole Mh is formed in this manhole M at a position corresponding to the through hole Wh in the side wall W.

[0015] As shown in Figures 1 and 5, a pressure wave soot blower SB supported by the support structure 1 of the present embodiment is provided on the side of the flow path FP of the waste heat boiler B. The pressure wave soot blower SB comprises a soot blower main body MB having a combustion chamber configured to burn a mixture containing fuel gas and oxygen to generate shock waves, and a nozzle N configured to discharge shock waves from the soot blower main body MB. The pressure wave soot blower SB is supported by the support structure 1 of the present embodiment in such a state that the tip end of the nozzle N is inserted into the through hole Mh of the manhole M and the surface of the flange NF provided at the tip end of the nozzle N is in contact with the surface of the manhole M. That is, the through hole Mh of the manhole M is blocked by the flange NF, so that high-temperature gas does not leak from the inside of the flow path FP through the through hole Mh of the manhole M. The flange NF is detachably attached to the manhole M by means of bolts or the like.

[0016] In the following description, the left-right direction in Figure 1, that is, the normal direction of the side wall W, is referred to as the X-axis direction, and the up-down direction in Figure 1 is referred to as the Z-axis direction. In addition, the direction perpendicular to the paper surface in Figure 1, that is, the direction orthogonal to the normal direction of the side wall W (i.e., the direction orthogonal to the X-axis direction) and horizontal, is referred to as the Y-axis direction.

[0017] <Support Structure 1> As shown in Figure 1, the support structure 1 of the present embodiment comprises a first support portion 10 from which the pressure wave soot blower SB is suspended, and a second support portion 20 that movably connects the first support portion 10 to the frame F of the facility. The second support portion 20 has a structure that supports the first support portion 10 so as to be movable in the horizontal direction, that is, in the Y-axis direction, along the outer surface S1 of the side wall W of the flow path FP of the waste heat boiler B. Details of the structure of the second support portion 20 will be described later.

[0018] <First Support Portion 10> As shown in Fig. 1, the first support portion 10 includes a rail 13 suspended from the second support portion 20. The rail 13 is provided parallel to the normal direction of the side wall W, that is, parallel to the X-axis direction. A slider 14 movably provided along the axial direction of the rail 13 is attached to the rail 13. A soot blower main body MB of the pressure wave soot blower SB is suspended from the slider 14 via a spring hanger 12 and a wire 11. In other words, the first support portion 10 has a structure that enables the pressure wave soot blower SB to move in the X-axis direction by means of the rail 13 and the slider 14. Furthermore, the first support portion 10 has a structure that enables the pressure wave soot blower SB to move in the vertical direction (Z-axis direction) by means of the spring hanger 12.

[0019] <Second support portion 20> As shown in Fig. 1, the first support portion 10 is suspended from the second support portion 20. The second support portion 20 includes support bodies 20A and 20B which are spaced apart in the X-axis direction and have substantially the same structure. The rail 13 of the first support portion 10 is provided between the support bodies 20A and 20B, and both ends of the rail 13 are respectively suspended from the support bodies 20A and 20B. Note that the support bodies 20A and 20B have substantially the same structure and support the rail 13 of the first support portion 10 with substantially the same structure, so the support body 20A will be described below.

[0020] As shown in Figs. 1 to 3, the support body 20A of the second support portion 20 includes a base support portion 21 and a moving portion 22. The base support portion 21 includes a horizontal base member 21b and a pair of connecting members 21a, 21a for fixing the base member 21b to the equipment frame F. In other words, the base support portion 21 has a gate-shaped structure formed by the base member 21b and the pair of connecting members 21a, 21a, and is fixed to the frame F. The base member 21b has an upper surface 21f which is a horizontal surface. An elongated hole 21g, which is a hole penetrating between the upper surface 21f and the lower surface, is formed in the base member 21b (see Fig. 3(B)). The elongated hole 21g is formed such that its axial direction extends in a direction parallel to the outer surface S1 of the side wall W of the flow path FP.

[0021] The connecting shaft 22a of the movable part 22, which is connected to the rail 13 of the first support part 10, is inserted into the elongated hole 21g. Specifically, the lower end of the connecting shaft 22a is connected to the rail 13 of the first support part 10, and its upper end is inserted through the elongated hole 21g of the base member 21b of the base support part 21 and protrudes upward from the upper surface 21f of the base member 21b. The movable member 22b is attached to the upper end of this connecting shaft 22a, that is, the part located above the upper surface 21f of the base member 21b. The width of this movable member 22b is longer than the width of the elongated hole 21g to prevent it from falling out of the elongated hole 21g. The movable member 22b is designed to slide along the upper surface 21f of the base member 21b.

[0022] <Regarding the operation of the support structure 1 in this embodiment> Since the support structure 1 of this embodiment has the structure described above, even if the flow path FP of the waste heat boiler B expands and contracts along the Y-axis direction due to heat, it is possible to prevent a displacement in the relative position between the pressure wave type soot blower SB and the side wall W of the flow path FP, in other words, a displacement in the relative position between the pressure wave type soot blower SB and the through hole Mh of the manhole M.

[0023] As shown in Figure 4(A), the pressure wave type soot blower SB is installed when no heat is being applied to the flow path FP of the waste heat boiler B, that is, when the waste heat boiler B is not in operation (cold state). Specifically, the position of the slider 14 of the first support part 10 and the position of the movable parts 22 of the supports 20A and B of the second support part 20 are adjusted so that the central axis of the nozzle N coincides with the central axis of the through hole Mh of the manhole M and the surface of the flange NF is in contact with the outer surface of the manhole M. At this time, the position of the pressure wave type soot blower SB in the X-axis direction becomes the reference position BX shown in Figure 1, the position in the Y-axis direction becomes the reference position BY shown in Figures 3 and 4, and the position in the Z-axis direction becomes the reference position BZ shown in Figure 1.

[0024] When the pressure wave type soot blower SB is installed in the reference position, the waste heat boiler B is operated. As a result, high-temperature gas flows from the waste heat boiler B into the flow path FP, causing the temperature of the flow path FP to rise and the temperature of the side wall W to rise as well. When the temperature of the side wall W rises, the side wall W expands due to the heat. This causes a displacement between the side wall W and the pressure wave type soot blower SB in the X, Y, and Z axes. The displacement in the X axis direction is absorbed by the slider 14 of the first support part 10 moving along the rail 13, and the displacement in the Z axis direction is absorbed by the spring hanger 12 of the first support part 10 contracting. Furthermore, the displacement in the axial direction of the flow path FP, i.e., in the Y axis direction, is absorbed by the movement of the movable parts 22 of the supports 20A and B of the second support part 20 (see Figure 3(C)). In other words, when the position of the central axis of the through-hole Mh of the manhole M moves in the Y-axis direction (moves to the left in Figure 4(B)), the connecting shaft 22a of the support bodies 20A and B of the second support part 20 connected to the pressure wave type soot blower SB is inserted into the elongated hole 21g of the base support part 21, so the connecting shaft 22a moves along the elongated hole 21g, absorbing the displacement in the Y-axis direction.

[0025] Furthermore, when the waste heat boiler B is shut down, the temperature of the flow path FP decreases, and the temperature of the side wall W also decreases. As a result, the expanded side wall W contracts and returns to its original state, that is, the cold state. At this time, a displacement occurs between the pressure wave type soot blower SB, which is in the expanded state, and the side wall W in the X, Y, and Z axes. In this case as well, similar to when thermal expansion occurs from the cold state, the displacement in the X axis direction is absorbed by the slider 14 of the first support part 10 moving along the rail 13, and the displacement in the Z axis direction is absorbed by the spring hanger 12 of the first support part 10 contracting. The displacement in the Y axis direction is absorbed by the movement of the movable parts 22 of the supports 20A and B of the second support part 20.

[0026] As described above, by adopting the support structure 1 of the pressure wave type soot blower SB of this embodiment, it becomes possible to adjust the position of the pressure wave type soot blower SB in accordance with the displacement of the side wall W of the flow path FP, even if the side wall W expands and contracts. This reduces the risk of gas leakage and other problems caused by misalignment between the nozzle N of the pressure wave type soot blower SB and the through-hole Wh in the side wall W (in other words, the through-hole Mh of the manhole M).

[0027] Furthermore, the movement of the pressure wave type soot blower SB in the Y-axis direction is achieved by moving the connecting shaft 22a along the elongated hole 21g provided in the base member 21b of the base support part 21 of the second support part 20. This simplifies the structure for moving the pressure wave type soot blower SB along the Y-axis direction. Normally, the movement of the pressure wave type soot blower SB in the Y-axis direction, that is, the position adjustment of the pressure wave type soot blower SB in the Y-axis direction, is performed by an operator moving the movable part 22 of the support bodies 20A and B of the second support part 20. Alternatively, the position adjustment of the pressure wave type soot blower SB in the Y-axis direction may be performed automatically by moving the movable part 22 in accordance with the expansion and contraction of the side wall W of the flow path FP.

[0028] <Regarding the structure of the second support section 20> If the second support section 20 has the structure described above, it is possible to effectively prevent the first support section 10, that is, the pressure wave type soot blower SB, from falling from the second support section 20, while guiding the movement of the first support section 10 with a simple structure. On the other hand, the structure by which the second support section 20 moves the first support section 10 along a direction parallel to the outer surface S1 of the side wall W of the flow path FP (Y-axis direction) is not limited to the above structure, and various known methods can be adopted. For example, a groove extending in the axial direction parallel to the outer surface S1 of the side wall W of the flow path FP may be provided on the upper surface of the base member 21b of the second support section 20, and a slider or wheel that moves along this groove may be provided, and the slider or wheel may be connected to the rail 13 of the first support section 10 by a connecting shaft or the like.

[0029] <Regarding the structure of the first support section 10> The structure of the first support portion 10 is not limited to the structure described above, as long as it is capable of absorbing displacement in the X-axis and Z-axis directions. [Industrial applicability]

[0030] The support structure for a pressure wave type soot blower of the present invention is suitable for supporting a pressure wave type soot blower installed in equipment such as a waste heat boiler or a superheater. [Explanation of Symbols]

[0031] 1. Support structure of a pressure wave type soot blower 10 First support part 20 Second support part 21 Base support section 21b Base member 21g long hole 22 Mobile section 22a Connection shaft 22b Movable member SB Pressure Wave Soot Blower MB Soot Blower Body N Nozzle

Claims

1. A support structure for a pressure wave type soot blower that supplies pressure waves into a device through a through-hole that penetrates the wall of the device to which high-temperature gas is supplied, The support structure is, The pressure wave type soot blower is supported by a first support portion that supports the nozzle of the pressure wave type soot blower so that its axial direction is parallel to and along the direction normal to the wall of the device, The device comprises a second support portion that supports the first support portion so that it can move along a direction perpendicular to the normal direction of the wall of the device. A support structure for a pressure wave type soot blower, characterized by the following features.

2. The wall of the aforementioned apparatus has a vertical surface on its outer surface. The second support portion is, The aforementioned pressure wave type soot blower is supported so that it can move along the outer surface of the wall of the apparatus parallel to and horizontally. The support structure for the pressure wave type soot blower according to claim 1, characterized in that it is a support structure for a pressure wave type soot blower.

3. The second support portion is, A base support section having a horizontal upper surface, The device includes a movable part that moves parallel to the outer surface of the wall of the device along the upper surface of the base support, to which the first support part is connected. The support structure for the pressure wave type soot blower according to claim 2, characterized in that it is a support structure for a pressure wave type soot blower.

4. The base support portion includes: An elongated hole is provided that penetrates between the upper and lower surfaces and extends in a direction parallel to the outer surface of the wall of the device. The aforementioned movable part is A connecting shaft whose lower end is connected to the first support portion and whose upper end is inserted through the elongated hole in the base support portion and protrudes upward from the upper surface of the base support portion, The system includes a movable member that moves on the upper surface of the base support member, which is provided at the upper end of the connecting shaft. The support structure for the pressure wave type soot blower according to feature 3.

5. The aforementioned device is It has a flow channel section that extends horizontally through which high-temperature gas passes, The through-hole is provided in the vertical wall of the flow channel. The support structure for the pressure wave type soot blower according to claim 1, characterized in that it is a support structure for a pressure wave type soot blower.

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