Combustion device, ignition part detachment method, and ignition part attachment method

Abstract

To easily perform work such as inspection, repair, and replacement of an igniter even if the igniter is deformed by contact with a falling object in a furnace.SOLUTION: A combustion device 100 comprises: a nozzle part 10 arranged so as to face a furnace 200; a burner part attached to the nozzle part 10, and for injecting fuel; an ignition part 30 for igniting the fuel injected from the burner part; and a casing part 40 housing the burner part and the ignition part 30. The ignition part 30 comprises: an igniter 31 for generating an ignition source from a tip part 31a, and formed in a rod shape; a guide pipe 32 housing the igniter 31 in such a manner that it can advance and retreat, and having flexibility; a flange part 33 detachably fixing a base end part 32a of the guide pipe 32 to the casing part 40; and a supporting mechanism 34 attached to the flange part 33, and supporting a tip part 32b of the guide pipe 32 on the side of the furnace 200.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to a combustion device, an ignition unit removal method, and an ignition unit installation method. [Background technology]

[0002] Conventionally, a technique for igniting a burner by an igniter that generates an electric spark is known (see, for example, Patent Document 1). Patent Document 1 discloses that an igniter rod is attached inside an igniter sleeve, and an igniter is disposed at the tip of the igniter rod. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 63-210509 Summary of the Invention [Problem to be solved by the invention]

[0004] In a furnace in which a combustion device including a burner is disposed, clinker may adhere to the furnace wall and then fall downward from the furnace wall. In the device disclosed in Patent Document 1, if the clinker falls from the furnace wall and contacts an igniter disposed protruding into the furnace, the igniter may deform and become unable to be pulled out from the igniter sleeve. In this case, since the igniter (including the part corresponding to the igniter rod in Patent Document 1) cannot be pulled out from the igniter sleeve, it is necessary to carry out the inspection, repair, replacement, and other work of the igniter from inside the furnace, which makes these work difficult.

[0005] The present disclosure has been made in consideration of the above circumstances, and aims to provide a combustion device, a method for removing an ignition unit, and a method for installing an ignition unit that make it easy to inspect, repair, replace, and otherwise perform operations on an igniter even if the igniter is deformed due to contact with falling objects in the furnace, etc. [Means for solving the problem]

[0006] In order to solve the above problems, the combustion device and ignition unit removal method of the present disclosure employ the following measures. A combustion device according to one aspect of the present disclosure is a combustion device that supplies fuel to a furnace and burns it, and includes a nozzle section arranged facing the furnace, a burner section attached to the nozzle section and injecting the fuel to burn it in the furnace, an ignition section that ignites the fuel sprayed from the burner section, and a casing section that houses the burner section and the ignition section, and the ignition section includes an igniter that generates an ignition source from a tip section and is formed in a rod shape, a guide pipe that houses the igniter so that it can be advanced and retreated and is flexible, a fixing section that detachably fixes a base end of the guide pipe to the casing section, and a support mechanism that is attached to the fixing section and supports the tip section of the guide pipe on the furnace side.

[0007] An ignition unit removal method according to one aspect of the present disclosure is a method for removing an ignition unit that ignites fuel from a combustion device that supplies fuel to a furnace and burns the fuel, the combustion device comprising: a nozzle unit arranged facing the furnace; a burner unit attached to the nozzle unit and injects the fuel to burn it in the furnace; the ignition unit that ignites the fuel injected from the burner unit; and a casing unit that accommodates the burner unit and the ignition unit, the ignition unit generating an ignition source from a tip portion and The ignition unit comprises an igniter formed in a rod shape, a flexible guide pipe that accommodates the igniter so that it can be advanced and retreated, a fixing portion that removably fixes the base end of the guide pipe to the casing portion, and a support mechanism that is attached to the fixing portion and supports the tip end of the guide pipe on the furnace side, and is provided with a release process that releases the fixed state in which the fixing portion fixes the base end of the guide pipe to the casing portion, and a removal process that removes the ignition unit whose fixed state has been released from the casing portion. Effect of the Invention

[0008] According to the present disclosure, it is possible to provide a combustion device, an ignition unit removal method, and an ignition unit installation method that make it easy to inspect, repair, replace, and otherwise perform operations on an igniter even if the igniter is deformed due to contact with falling objects in the furnace, for example. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a front view showing a combustion device according to an embodiment of the present disclosure. [Diagram 2] 2 is a cross-sectional view of the combustion apparatus shown in FIG. 1 taken along the line AA. [Diagram 3] FIG. 2 is a partial cross-sectional view of the combustion apparatus shown in FIG. 1 taken along the arrow BB. [Figure 4] 2 is a partial cross-sectional view taken along the line CC of the combustion apparatus shown in FIG. 1, showing a state in which a base end of a guide pipe is fixed to a rear casing. [Diagram 5] FIG. 2 is a partial cross-sectional view taken along the line CC of the combustion apparatus shown in FIG. 1, illustrating a released state in which a base end of a guide pipe is not fixed to a rear casing. [Figure 6] FIG. 2 is a partial cross-sectional view taken along the line CC of the combustion apparatus shown in FIG. 1, illustrating a released state in which a base end of a guide pipe is not fixed to a rear casing. [Figure 7] 2 is a partial cross-sectional view taken along the line CC of the combustion device shown in FIG. 1, showing a state in which a part of the ignition part is inserted into the accommodation space of the casing part in the released state. [Figure 8] 2 is a partial cross-sectional view taken along the line CC of the combustion device shown in FIG. 1, showing a state in which a part of the ignition part is inserted into the accommodation space of the casing part in the released state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a combustion device 100 according to an embodiment of the present disclosure, an ignition unit removing method, and an ignition unit attaching method will be described with reference to the drawings. Fig. 1 is a front view showing a combustion device according to an embodiment of the present disclosure. Fig. 2 is a cross-sectional view of the combustion device 100 shown in Fig. 1 taken along the line AA. Fig. 3 is a cross-sectional view of the combustion device 100 shown in Fig. 1 taken along the line BB.

[0011] The combustion device 100 of this embodiment is a device provided in a boiler that supplies pulverized fuel to a furnace 200 and combusts it. The boiler of this embodiment uses, for example, pulverized coal obtained by pulverizing coal as fuel. The boiler ejects the pulverized coal from a pulverized coal burner (not shown) together with primary air for transporting the pulverized coal, combusts the pulverized coal together with secondary air for combustion, and recovers the heat generated by this combustion.

[0012] The combustion device 100 of this embodiment is a device that forms an ignition flame for igniting pulverized coal injected from a pulverized coal burner to cause stable combustion of the pulverized coal burner when starting up a boiler, or a startup flame for raising the temperature inside the furnace 200 before igniting the pulverized coal burner. The combustion device 100 is a device that supplies liquid fuel (e.g., light oil, various heavy oil process waste liquids, biomass-derived oil (palm oil, etc.), liquefied ammonia, and mixed fuels thereof, etc.) to the furnace 200 and burns it. Note that the combustion device 100 is not limited to one that generates an ignition flame or a startup flame, and may be, for example, one that burns the main fuel of the boiler instead of the pulverized coal burner.

[0013] As shown in FIGS. 1 to 3, a combustion device 100 of this embodiment includes a nozzle portion 10, an oil burner (burner portion) 20, an ignition portion 30, and a casing portion 40 that houses the oil burner 20 and the ignition portion 30.

[0014] The nozzle part 10 is a member arranged with a tip opening 10a facing the furnace 200. As shown in Fig. 2, the nozzle part 10 is attached to the casing part 40 by a pair of connecting members 11 at both ends in the horizontal direction HD so as to be swingable around a swing axis Y. As shown in Fig. 3, the nozzle part 10 has a holding part 12 into which the tip part 32b of the guide pipe 32 is inserted and which holds the tip part 32b relative to the nozzle part 10.

[0015] The holding part 12 is a member formed in a tubular shape. A slit 12a is formed below the holding part 12 in the vertical direction VD, which extends along the guide pipe 32 and is wider than the tip part 31a of the igniter 31. The slit 12a is a gap for passing the tip part 31a of the igniter 31 when the ignition part 30 is removed from the combustion device 100 in a state in which the tip part 31a of the igniter 31 is deformed downward in the vertical direction VD.

[0016] The oil burner 20 is a device that is attached to the nozzle portion 10 and injects liquid fuel to combust it in the furnace 200, thereby forming an ignition flame for stable combustion of the pulverized coal burner. The oil burner 20 is formed to extend along the axis X. A tip portion 21 of the oil burner 20 on the furnace 200 side is fixed to the nozzle portion 10, and a base portion 22 of the oil burner 20 is fixed to a rear casing 43 of the casing portion 40.

[0017] The ignition unit 30 is a device that ignites the liquid fuel injected from the oil burner 20. As shown in Fig. 3, the ignition unit 30 has an igniter 31, a guide pipe 32, a flange portion (fixing portion) 33, and a support mechanism 34 (a part of the support mechanism 34).

[0018] The igniter 31 is a rod-shaped member that generates an ignition source from a tip portion 31a. The igniter 31 discharges continuously or intermittently with a voltage supplied from a voltage generator (not shown). An electric spark formed by the discharge from the igniter 31 serves as an ignition source and ignites the liquid fuel injected from the oil burner 20. The flame of the oil burner then ignites the pulverized coal injected from the pulverized coal burner. Note that the ignition source may be generated by generating plasma instead of an electric spark by discharge.

[0019] The guide pipe 32 is a tubular member that accommodates the igniter 31 so that the igniter 31 can advance and retreat therein. The guide pipe 32 is formed of a structure (e.g., a flexible tube) having at least a portion having flexibility. Since the guide pipe 32 is flexible, it deforms according to the angle of the nozzle part 10 when the nozzle part 10 swings along the swing axis Y.

[0020] The flange portion (fixing portion) 33 is a member that detachably fixes the base end portion 32a of the guide pipe 32 to the casing. A flange portion (mounting portion) 43a is attached to the rear casing 43 of the casing portion 40. The flange portion 33 is brought into contact with the flange portion 43a, and fastening bolts (fasteners) 33a are inserted into through holes formed in both the flange portion 33 and the flange portion 43a, and fastening nuts (fasteners) 33b are fastened, whereby the flange portion 33 and the flange portion 43a are integrated.

[0021] The flange portion 33 detachably fixes the base end 32a of the guide pipe 32 to the rear casing 43 with a fastening bolt (fastener) 33a and a fastening nut (fastener) 33b. As shown in Fig. 3 and other figures, the base end 32a of the guide pipe 32 is the vicinity of the end opposite to the tip end 32b of the guide pipe 32. It is not necessary to fix the end of the guide pipe 32 to the rear casing 43, and it is sufficient if the vicinity of the end of the guide pipe 32 can be fixed.

[0022] The support mechanism 34 is a mechanism that is attached to the flange portion 33 and supports the tip portion 32b of the guide pipe 32 on the furnace 200 side. The support mechanism 34 has a main body portion 34a that is attached to the flange portion 33, a support portion 34b that supports the guide pipe 32, a support rail 34c, and legs 34d. The support portion 34b is attached to the end portion of the main body portion 34a on the furnace 200 side so as to be swingable around the swing axis Y.

[0023] The main body 34a has a first member 34a1 supported by the support rail 34c, and a second member 34a2 disposed on the end of the first member 34a1 on the furnace 200 side. The end of the second member 34a2 on the furnace 200 side holds the support portion 34b so as to be swingable around the swing axis Y.

[0024] The support rails 34c are members that are installed in the lower casing 45 of the casing unit 40 and support the lower side of the main body unit 34a in the vertical direction VD so that the main body unit 34a can move along the axis X in a direction toward the nozzle unit 10 or in a direction away from the nozzle unit 10. A pair of support rails 34c are arranged along the axis X so as to sandwich the guide pipe 32. The support rails 34c are installed in the lower casing 45 via legs 34d extending along the vertical direction VD.

[0025] A drop prevention member 34a1A is joined to the first member 34a1 of the main body 34a by welding or the like. As shown in FIG. 3, the pair of drop prevention members 34a1A are installed at two locations spaced apart along the axis X so as to sandwich the pair of support rails 34c along the horizontal direction HD perpendicular to the axis X. As shown in FIG. 4, the drop prevention member 34a1A is disposed so as to protrude downward from the surface on which the first member 34a1 is supported by the support rails 34c. The pair of drop prevention members 34a1A are members that guide the pair of first members 34a1 so as not to drop off from the pair of support rails 34c by sandwiching the pair of support rails 34c along the horizontal direction HD.

[0026] The casing portion 40 is a member that forms an accommodation space AS that accommodates the oil burner 20 and the ignition portion 30. The casing portion 40 has a side casing 41, a side casing 42, a rear casing 43, an upper casing 44, and a lower casing 45.

[0027] Next, an ignition unit removal method for removing the ignition unit 30 of this embodiment from the combustion device 100 will be described. Fig. 4 is a partial cross-sectional view taken along the CC arrow of the combustion device 100 shown in Fig. 1, showing a fixed state in which the base end 32a of the guide pipe 32 is fixed to the rear casing 43. Fig. 5 is a partial cross-sectional view taken along the CC arrow of the combustion device shown in Fig. 1, showing a released state in which the base end 32a of the guide pipe 32 is not fixed to the rear casing 43. Fig. 6 is a partial cross-sectional view taken along the CC arrow of the combustion device 100 shown in Fig. 1, showing a released state in which the base end 32a of the guide pipe 32 is not fixed to the rear casing 43.

[0028] 4, when a falling object such as clinker falls from above in the vertical direction VD and contacts the tip 31a of the igniter 31 with the tip 31a of the igniter 31 protruding into the furnace 200, the tip 31a of the igniter 31 is deformed downward in the vertical direction VD as shown by the solid line. In this case, even if an attempt is made to pull out the igniter 31 from the guide pipe 32, the tip 31a of the igniter 31 cannot be pulled out because it is caught on the end of the guide pipe 32 on the furnace 200 side.

[0029] 4, an operator releases the flange portion 33 from the fixed state in which the base end portion 32a of the guide pipe 32 is fixed to the rear casing 43 of the casing portion 40 (release step). The operator releases the fastening nuts 33b from the fastening bolts 33a, so that the flange portion 33 is no longer fixed to the flange portion 43a.

[0030] After releasing the fixed state in which flange portion 33 fixes base end portion 32a of guide pipe 32 to rear casing 43 of casing portion 40, the worker removes ignition portion 30, whose fixed state has been released, from casing portion 40 (removal process). As shown in Figures 5 and 6, ignition portion 30 can be removed integrally with igniter 31, guide pipe 32, flange portion 33, and main body portion 34a and support portion 34b of support mechanism 34 (excluding support rail 34c and leg portion 34d of support mechanism 34).

[0031] Therefore, when an operator pulls out the ignition part 30 along the axis X in a direction away from the rear casing 43, the state shown in Fig. 5 is reached. The state shown in Fig. 5 illustrates a state in which the tip part 31a of the igniter 31 passes through the slit 12a of the holding part 12. As shown in Fig. 5, the tip part 31a of the igniter 31 is deformed downward in the vertical direction VD, but the tip part 31a of the igniter 31 passes through the slit 12a.

[0032] When the operator pulls out the ignition unit 30 further along the axis X in the direction away from the rear casing 43, it will reach the state shown in Figure 6. Figure 6 shows the state where the support mechanism 34 passes through the flange portion 43a. When the operator pulls out the ignition unit 30 further along the axis X in the direction away from the rear casing 43, the entire ignition unit 30 will be removed from the accommodation space AS of the casing portion 40. By the above-mentioned ignition unit removal method, the ignition unit 30 is removed from the combustion device 100.

[0033] Next, an ignition unit installation method for installing the ignition unit 30 of this embodiment to the combustion device 100 will be described. Fig. 7 is a partial cross-sectional view taken along the CC arrow of the combustion device 100 shown in Fig. 1, showing a state in which a part of the ignition unit 30 is inserted into the accommodation space AS of the casing part 40 in the released state. Fig. 8 is a partial cross-sectional view taken along the CC arrow of the combustion device 100 shown in Fig. 1, showing a state in which a part of the ignition unit 30 is inserted into the accommodation space AS of the casing part 40 in the released state.

[0034] With the entire ignition unit 30 removed from the accommodation space AS of the casing unit 40, the worker removes the igniter 31 from the guide pipe 32. Then, the worker inserts a rod-shaped member 35 extending linearly into the guide pipe 32, and causes the rod-shaped member 35 to protrude from the tip portion 32b of the guide pipe 32.

[0035] With rod-shaped member 35 inserted in guide pipe 32, the worker inserts ignition unit 30 into accommodation space AS of casing unit 40, as shown in FIG. 7. Thereafter, the worker places the lower side of main body portion 34a of support mechanism 34 in the vertical direction VD in a state supported by support rail 34c, and inserts ignition unit 30 further into accommodation space AS of casing portion 40 so as to approach nozzle portion 10, as shown in FIG. 8. As shown in FIG. 8, because rod-shaped member 35 is formed in a straight line, the tip of rod-shaped member 35 can be easily inserted into holding portion 12, and tip portion 32b of guide pipe 32 is positioned so as to be insertable into holding portion 12.

[0036] The worker inserts the ignition unit 30 into the accommodation space AS until the flange portion 33 and the flange portion 43a come into contact with each other. After that, the worker inserts the fastening bolt 33a into the through holes of the flange portion 33 and the flange portion 43a, and fastens the fastening nut 33b to the fastening bolt 33a, thereby fixing the flange portion 33 to the flange portion 43a and establishing a fixed state.

[0037] With the base end 32a of the guide pipe 32 fixed to the rear casing 43 of the casing part 40, the worker pulls out the rod-shaped member 35 from the guide pipe 32 to remove it. After that, the worker inserts the igniter 31 into the guide pipe 32 to bring it into the state shown in Fig. 4. By the above-mentioned ignition part installation method, the ignition part 30 is installed in the combustion device 100.

[0038] The combustion device 100 of the present embodiment described above provides the following actions and effects. According to the combustion device 100 of this embodiment, the igniter 31 formed in a rod shape is housed in the flexible guide pipe 32, and the tip 32b of the guide pipe 32 on the furnace 200 side is supported by the support mechanism 34. The support mechanism 34 is attached to the flange portion 33 that detachably fixes the base end 32a of the guide pipe 32 to the casing portion 40. By releasing the fixed state in which the flange portion 33 fixes the base end 32a of the guide pipe 32 to the casing portion 40, the ignition portion 30, which is an integral part of the flange portion 33, the support mechanism 34 attached to the flange portion 33, and the guide pipe 32 supported by the support mechanism 34, can be easily removed from the casing portion 40.

[0039] According to the combustion device 100 of this embodiment, the guide pipe 32 in which the igniter 31 is housed can be removed from the casing part 40, so that even if the igniter 31 is deformed and cannot be pulled out from the guide pipe 32, the igniter 31 can be removed from the casing part 40. Therefore, even if the igniter 31 is deformed due to contact with fallen objects (clinker, etc.) in the furnace 200, the igniter 31 can be easily inspected, repaired, replaced, and the like.

[0040] According to the combustion device 100 of this embodiment, since the nozzle portion 10 is attached to the casing portion 40 so as to be swingable around the swing axis Y, the direction in which fuel is injected from the oil burner 20 to the furnace 200 can be switched to any direction. Also, in the support mechanism 34, the support portion 34b supporting the flexible guide pipe 32 is attached to the main body portion 34a so as to be swingable around the swing axis Y. Therefore, the swing angle of the support portion 34b can be made to follow the fluctuation of the swing angle of the nozzle portion 10, and the state in which the support portion 34b supports the guide pipe 32 can be appropriately maintained.

[0041] According to the combustion device 100 of this embodiment, the lower side of the main body portion 34a of the support mechanism 34 in the vertical direction VD is supported by the support rail 34c, so that when the flange portion 33 releases the fixed state in which the base end portion 32a of the guide pipe 32 is fixed to the casing portion 40 and the ignition portion 30 is removed from the casing portion 40, the ignition portion 30 can be easily moved in a direction away from the nozzle portion 10.

[0042] According to the combustion device 100 of this embodiment, the tip portion 32b of the guide pipe 32 is held by the holding portion 12, so that the relative position of the igniter 31 with respect to the nozzle portion 10 can be reliably fixed, thereby achieving stable ignition performance.

[0043] According to the combustion device 100 of this embodiment, a slit 12a wider than the tip 31a of the igniter 31 is formed below the holding part 12 in the vertical direction VD. Therefore, even if the igniter 31 is deformed due to contact with a fallen object in the furnace 200, the deformed tip 31a of the igniter 31 can pass through the slit 12a, and the ignition part 30 can be easily removed from the casing part 40.

[0044] According to the combustion device 100 of this embodiment, the fastening bolts 33a and the fastening nuts 33b can be used to easily switch between a fixed state in which the base end 32a of the guide pipe 32 is fixed to the casing portion 40 by the flange portion 33, and a released state in which the fixed state is released.

[0045] The combustion device 100, the ignition unit removing method, and the ignition unit attaching method described in the above-described respective embodiments can be understood, for example, as follows. A combustion device according to a first aspect of the present disclosure is a combustion device (100) that supplies fuel to a furnace to burn it and is fixed to a casing section (40), and includes a nozzle section (10) arranged facing the furnace, a burner section (20) attached to the nozzle section and injecting fuel to burn it in the furnace, and an ignition section (30) that ignites the fuel sprayed from the burner section, and the ignition section includes an igniter (31) that generates an ignition source from a tip section (31a) and is formed in a rod shape, a guide pipe (32) that houses the igniter so that it can be advanced and retreated and is flexible, a fixing section (33a) that detachably fixes a base end section (32a) of the guide pipe to the casing section, and a support mechanism (34) that is attached to the fixing section and supports a tip section (32b) of the guide pipe on the furnace side.

[0046] According to the combustion device of the first aspect of the present disclosure, a rod-shaped igniter is housed in a flexible guide pipe, and the end of the guide pipe on the furnace side is supported by a support mechanism. The support mechanism is attached to a fixing part that detachably fixes the base end of the guide pipe to the casing part. By releasing the fixed state in which the fixing part fixes the base end of the guide pipe to the casing part, the ignition part, which is an integral part of the fixing part, the support mechanism attached to the fixing part, and the guide pipe supported by the support mechanism, can be easily removed from the casing part.

[0047] According to the combustion device of the first aspect of the present disclosure, since the guide pipe in which the igniter is housed can be removed from the casing, even if the igniter is deformed and cannot be pulled out from the guide pipe, the igniter can be removed from the casing. Therefore, even if the igniter is deformed due to contact with a fallen object in the furnace, the igniter can be easily inspected, repaired, replaced, and the like.

[0048] The combustion device according to the second aspect of the present disclosure is the first aspect, and further includes the following configuration: the nozzle portion is attached to the casing portion so as to be swingable around a swing axis (Y), the support mechanism has a main body portion (34a) attached to the fixed portion and a support portion (34b) that supports the guide pipe, and the support portion is attached to an end portion of the main body portion on the furnace side so as to be swingable around the swing axis.

[0049] According to the combustion device of the second aspect of the present disclosure, since the nozzle section is attached to the casing section so as to be swingable about the swing axis, the direction in which fuel is injected from the burner section to the furnace can be switched to any direction. Also, in the support mechanism, the support section that supports the guide pipe is attached to the main body section so as to be swingable about the swing axis. Therefore, the swing angle of the support section can be made to follow the fluctuation of the swing angle of the nozzle section, and the state in which the support section supports the guide pipe can be appropriately maintained.

[0050] According to the combustion apparatus of the third aspect of the present disclosure, the support mechanism has a support rail (34c) that is installed in the casing portion and supports the vertically lower side of the main body portion so that the main body portion can move horizontally toward or away from the nozzle portion.

[0051] According to the combustion device of the third aspect of the present disclosure, the vertical lower side of the main body of the support mechanism is supported by the support rail, so that when the fixing portion releases the fixed state in which the base end of the guide pipe is fixed to the casing portion and the ignition portion is removed from the casing portion, the ignition portion can be easily moved in a direction away from the nozzle portion.

[0052] The combustion device according to a fourth aspect of the present disclosure is the combustion device of any one of the first to third aspects, further comprising the following configuration: the nozzle portion has a holding portion (12) into which the tip portion of the guide pipe is inserted and which holds the tip portion relative to the nozzle portion.

[0053] According to the combustion device of the fourth aspect of the present disclosure, the tip of the guide pipe is held by the holding portion, so that the position of the igniter relative to the nozzle portion can be reliably fixed, thereby achieving stable ignition performance.

[0054] The combustion device according to a fifth aspect of the present disclosure is the fourth aspect, and further includes the following configuration: A slit (12a) is formed vertically below the holding part, the slit extending along the guide pipe and being wider than the tip of the igniter.

[0055] According to the combustion device of the fifth aspect of the present disclosure, a slit wider than the tip of the igniter is formed vertically below the holding part, so that even if the igniter is deformed due to contact with a fallen object in the furnace, the deformed tip of the igniter passes through the slit, and the ignition part can be easily removed from the casing part.

[0056] The combustion device according to a sixth aspect of the present disclosure is the combustion device of any one of the first to third aspects, further including the following configuration: The fixing portion is detachably fixed to an attachment portion (43a) attached to the casing portion by fasteners (33a, 33b).

[0057] According to the combustion device of the sixth aspect of the present disclosure, the fastener can be used to easily switch between a fixed state in which the base end of the guide pipe is fixed to the casing portion by the fixing portion, and a released state in which the fixed state is released.

[0058] An ignition unit removal method according to a seventh aspect of the present disclosure is a method for removing an ignition unit that ignites fuel from a combustion device that supplies fuel to a furnace to burn it and is fixed to a casing part, the combustion device comprising: a nozzle part arranged facing the furnace; a burner part attached to the nozzle part and injecting fuel to burn it in the furnace; and the ignition unit that ignites the fuel sprayed from the burner part, the ignition unit comprising: an igniter that generates an ignition source from a tip part and is formed in a rod shape; a guide pipe that houses the igniter so that it can be advanced and retreated and is flexible; a fixing part that detachably fixes a base end of the guide pipe to the casing part; and a support mechanism that is attached to the fixing part and supports the tip end of the guide pipe on the furnace side, the method comprising: a release step for releasing a fixed state in which the fixing part fixes the base end of the guide pipe to the casing part; and a removal step for removing the ignition unit whose fixed state has been released from the casing part.

[0059] According to the ignition unit removal method according to the seventh aspect of the present disclosure, a rod-shaped igniter is housed in a flexible guide pipe, and a furnace-side tip of the guide pipe is supported by a support mechanism. The support mechanism is attached to a fixing part that detachably fixes a base end of the guide pipe to a casing part. In a release step, the fixing part releases the fixed state in which the base end of the guide pipe is fixed to the casing part, and in a removal step, the ignition unit, which is an integral part of the fixing part, the support mechanism attached to the fixing part, and the guide pipe supported by the support mechanism, can be easily removed from the casing part.

[0060] According to the ignition unit removal method of the seventh aspect of the present disclosure, since the guide pipe in which the igniter is housed can be removed from the casing, the igniter can be removed from the casing even if the igniter is deformed and cannot be pulled out from the guide pipe. Therefore, even if the igniter is deformed due to contact with a fallen object in the furnace, the igniter can be easily inspected, repaired, replaced, and the like.

[0061] An ignition unit mounting method according to an eighth aspect of the present disclosure is a method for mounting an ignition unit that supplies fuel to a furnace to burn it and ignites the fuel from a combustion device that is fixed to a casing part, the combustion device comprising: a nozzle unit that is disposed facing the furnace and is attached to the casing part so as to be swingable about a swing axis; a burner unit that is attached to the nozzle unit and injects fuel to burn it in the furnace; and the ignition unit that ignites the fuel sprayed from the burner unit, the ignition unit comprising: an igniter that generates an ignition source from a tip end portion and is formed in a rod shape; a guide pipe that houses the igniter so as to be able to advance and retreat and is flexible; and a base end portion of the guide pipe that is detachably fixed to the casing part. and a support mechanism attached to the fixed part and supporting the tip end of the guide pipe on the furnace side, the support mechanism having a main body attached to the fixed part and a support part supporting the guide pipe, the support part being attached to the end of the main body on the furnace side so as to be swingable around the swing axis, and the ignition unit includes the steps of: inserting a rod-shaped member extending linearly into the guide pipe; inserting the ignition unit with the rod-shaped member inserted into the guide pipe into the casing part; fixing the base end of the guide pipe to the casing part by the fixed part to achieve a fixed state; removing the rod-shaped member from the guide pipe; and inserting the igniter into the guide pipe.

[0062] According to the ignition unit removal method of the eighth aspect of the present disclosure, a rod-shaped member extending linearly is inserted into the guide pipe, and the ignition unit with the rod-shaped member inserted into the guide pipe is inserted into the casing unit, so that the ignition unit can be inserted into the casing unit without the support unit of the support mechanism rotating about the swing axis relative to the main body unit. The ignition unit is then fixed to the casing unit by fixing the base end of the guide pipe to the casing unit with the fixing unit to a fixed state. Thereafter, the rod-shaped member is removed from the guide pipe, and an igniter is inserted into the guide pipe to enable ignition by the igniter. [Explanation of symbols]

[0063] 10 Nozzle section 10a Tip opening 11 Connecting members 12 Holding part 12a Slit 20 Oil burner (burner section) 21 Tip 22 Proximal end 30 Ignition part 31 Igniter 31a Tip 32 Guide pipe 32a Proximal end 32b Tip 33 Flange part (fixed part) 33a Fastening bolt (fastener) 33b Fastening nut (fastener) 34 Support mechanism 34a Main body 34a1 First member 34a2 Second member 34b Support part 34c Support rail 34d legs 35 Rod-shaped member 40 Casing section 41,42 Side casing 43 Back casing 43a Flange 44 Upper casing 45 Lower casing 100 Combustion equipment 200 Furnace AS Storage Space HD horizontal VD Vertical direction X axis Y Swing Axis

Claims

1. A combustion device that supplies fuel to a furnace and burns it, A nozzle portion arranged facing the furnace; a burner portion attached to the nozzle portion and injecting the fuel to combust it in the furnace; an ignition unit that ignites the fuel injected from the burner unit; A casing portion that accommodates the burner portion and the ignition portion, The ignition unit includes: An igniter that generates an ignition source from a tip portion and is formed in a rod shape; a guide pipe that accommodates the igniter so that the igniter can be advanced and retreated and that has flexibility; a fixing portion that detachably fixes a base end portion of the guide pipe to the casing portion; a support mechanism attached to the fixed portion and supporting the tip of the guide pipe on the furnace side.

2. The nozzle portion is attached to the casing portion so as to be swingable around a swing axis, The support mechanism includes: A main body portion attached to the fixing portion; a support portion for supporting the guide pipe, 2. The combustion apparatus according to claim 1, wherein the support portion is attached to an end portion of the main body portion on the furnace side so as to be swingable about the swing axis.

3. The support mechanism includes:

3. The combustion apparatus according to claim 2, further comprising a support rail that is installed in the casing portion and supports a vertical lower side of the main body portion so that the main body portion can move toward or away from the nozzle portion.

4. The combustion apparatus according to claim 1 , wherein the nozzle portion has a holder into which the tip portion of the guide pipe is inserted and which holds the tip portion relative to the nozzle portion.

5. 5. The combustion device according to claim 4, wherein a slit extending along said guide pipe and wider than said tip end of said igniter is formed vertically below said holding portion.

6. The combustion apparatus according to claim 1 , wherein the fixing portion is detachably fixed to an attachment portion attached to the casing portion by a fastener.

7. 1. A method for removing an ignition unit that ignites fuel from a combustion device that supplies fuel to a furnace and burns the fuel, comprising the steps of: The combustion device includes: A nozzle portion arranged facing the furnace; a burner portion attached to the nozzle portion and injecting the fuel to combust it in the furnace; the ignition unit that ignites the fuel injected from the burner unit; A casing portion that accommodates the burner portion and the ignition portion, The ignition unit includes: An igniter that generates an ignition source from a tip portion and is formed in a rod shape; a guide pipe that accommodates the igniter so that the igniter can be advanced and retreated and that has flexibility; a fixing portion that detachably fixes a base end portion of the guide pipe to the casing portion; A support mechanism is attached to the fixing portion and supports a tip end of the guide pipe on the furnace side, a release step of releasing a fixed state in which the fixing portion fixes the base end portion of the guide pipe to the casing portion; and a removal step of removing the ignition unit, the fixed state of which has been released, from the casing unit.

8. A method for attaching an ignition unit to a combustion device that supplies fuel to a furnace and burns the fuel, comprising the steps of: The combustion device includes: A nozzle portion is disposed facing the furnace and attached to a casing portion so as to be swingable around a swing axis; a burner portion attached to the nozzle portion and injecting the fuel to combust it in the furnace; the ignition unit that ignites the fuel injected from the burner unit; The casing portion accommodates the burner portion and the ignition portion, The ignition unit includes: An igniter that generates an ignition source from a tip portion and is formed in a rod shape; a guide pipe that accommodates the igniter so that the igniter can be advanced and retreated and that has flexibility; a fixing portion that detachably fixes a base end portion of the guide pipe to the casing portion; A support mechanism is attached to the fixing portion and supports a tip end of the guide pipe on the furnace side, The support mechanism includes: A main body portion attached to the fixing portion; a support portion for supporting the guide pipe, The support portion is attached to an end portion of the main body portion on the furnace side so as to be swingable around the swing axis, a step of inserting a rod-shaped member extending linearly into the guide pipe; inserting the ignition unit, with the rod-shaped member inserted into the guide pipe, into the casing unit; a step of fixing a base end portion of the guide pipe to the casing portion by the fixing portion to maintain a fixed state; removing the rod-shaped member from the guide pipe; and inserting the igniter into the guide pipe.

Images