Deposit removal device and deposit removal method

Abstract

To remove deposit without stopping a boiler.SOLUTION: A deposit removal device 100 includes: a guide cylinder 40 into which a burner gun is detachably inserted; a deposit removal cylinder 110 detachably inserted into the guide cylinder 40 with the burner gun detached from the guide cylinder 40 and formed to have a cylindrical shape to extend along an axis X; and a removing medium supply part 120 that supplies a removing medium E for removing deposit 200 adhered to a portion in the vicinity of the guide cylinder 40 to the deposit removal cylinder 110. The deposit removal cylinder 110 includes: a first end part 110a on which an injection port 111 for injecting the removing medium E is formed and that is disposed on a furnace side; and a second end part 110b on which an inflow port for causing the removing medium E to be guided to the injection port 111 to flow into inside is formed. The deposit removal cylinder 110 is inserted into the guide cylinder 40 so that the injection port 111 advances to a position projecting to the furnace 2 side compared to the end part on the furnace 2 side of the guide cylinder 40.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present disclosure relates to an apparatus and method for removing deposits. [Background technology]

[0002] Conventionally, there is known an oil-fired burner gun that atomizes fuel oil supplied from outside the boiler with an atomizing medium such as air or steam and injects the atomized fuel oil into the boiler furnace (see, for example, Patent Document 1). The oil-fired burner gun of Patent Document 1 includes an oil carrier pipe for carrying the fuel oil, a gas carrier pipe for carrying the air or steam, and a nozzle provided at the tip of the oil-fired burner gun for injecting the fuel oil carried through the oil carrier pipe and the air or steam carried through the gas carrier pipe into the furnace. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-96590 A Summary of the Invention [Problem to be solved by the invention]

[0004] The oil-fired burner gun disclosed in Patent Document 1 has a flame holder at the tip on the furnace side. Depending on the properties of the fuel and other fossil fuels used at the same time, deposits may adhere and grow on the front surface of the flame holder. If the fuel sprayed from the oil-fired burner gun interferes with the deposits, there is a possibility that the high-temperature fuel will enter the inside of the guide tube or the wind box of the oil-fired burner gun.

[0005] To remove the deposits from the flame holder, it is necessary to stop the boiler and either pull out the oil-fired burner gun set together with the flame holder, or erect scaffolding inside the furnace and remove the deposits from inside the furnace, but stopping the boiler and carrying out additional work requires a lot of time and costs.On the other hand, if the boiler cannot be stopped, the only option is to suspend operation of the oil-fired burner gun, which may cause problems with operation such as boiler load restrictions.

[0006] The present disclosure has been made in consideration of the above circumstances, and aims to provide a deposit removal device and a deposit removal method that are capable of removing deposits without stopping the boiler. [Means for solving the problem]

[0007] In order to solve the above problems, the deposit removal device and deposit removal method of the present disclosure employ the following measures. An embodiment of the deposit removal device of the present disclosure comprises a first cylindrical portion having a nozzle formed at an end thereof for injecting fuel toward a furnace and a burner formed to extend along an axis and removably inserted therein, the burner being formed to extend along the axis, a second cylindrical portion having a cylindrical shape extending along the axis and removably inserted into the first cylindrical portion when the burner is removed from the first cylindrical portion, and a removal medium supply portion supplying a removal medium to the second cylindrical portion for removing deposits adhering near the first cylindrical portion, the second cylindrical portion having a first end portion having an injection port formed therein for injecting the removal medium and positioned on the furnace side, and a second end portion having an inlet formed therein for allowing the removal medium guided to the injection port to flow into the interior, the second cylindrical portion being inserted into the first cylindrical portion such that the injection port advances to a position protruding toward the furnace side beyond the furnace side end of the first cylindrical portion.

[0008] A method for removing deposits according to one embodiment of the present disclosure includes a removal step of removing a burner, which is formed to extend along the axis and has a nozzle at its end for injecting fuel toward a furnace, from a first cylindrical portion extending along the axis; an insertion step of inserting a second cylindrical portion formed to extend along the axis into the first cylindrical portion with the burner removed from the first cylindrical portion; and a removal medium supply step of supplying a removal medium to the second cylindrical portion for removing deposits adhering near the first cylindrical portion, wherein the second cylindrical portion has a first end portion formed with an injection port for injecting the removal medium and positioned on the furnace side, and a second end portion formed with an inlet for flowing the removal medium guided to the injection port into the interior, and in the insertion step, the second cylindrical portion is inserted into the first cylindrical portion so that the injection port advances to a position protruding toward the furnace side beyond the furnace side end of the first cylindrical portion. Effect of the Invention

[0009] According to the present disclosure, it is possible to provide an apparatus and method for removing deposits that are capable of removing deposits without shutting down a boiler. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a vertical cross-sectional view showing the burner gun attached to a boiler. [Diagram 2] FIG. 2 is a front view showing the burner gun shown in FIG. [Diagram 3] 1 is a flowchart showing a method for removing adhesion according to an embodiment of the present disclosure. [Figure 4] FIG. 2 is a vertical sectional view showing a state in which the burner gun shown in FIG. 1 is removed from the wind box. [Diagram 5] FIG. 11 is a vertical cross-sectional view showing a state in which a deposit removal tube is being inserted into a guide tube of a boiler from which the burner gun has been removed. [Figure 6] FIG. 2 is a vertical cross-sectional view showing a state in which a deposit removal tube is inserted into a guide tube of a boiler from which a burner gun has been removed. [Figure 7]FIG. 4 is a partial enlarged view showing a first end of the deposit removal cylinder. [Figure 8] 8 is a cross-sectional view of the deposit removal cylinder shown in FIG. 7 taken along the line AA. [Figure 9] 13 is a partially enlarged view showing a modified example of a first end portion of the deposit removal cylinder. FIG. [Figure 10] 10 is a cross-sectional view of the deposit removal cylinder shown in FIG. 9 taken along the line BB. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, a burner gun 5 and a deposit removal device 100 according to an embodiment of the present disclosure will be described with reference to the drawings. Fig. 1 is a vertical cross-sectional view showing a state in which the burner gun 5 is attached to a boiler 1. Fig. 2 is a front view showing the burner gun 5 shown in Fig. 1.

[0012] As shown in Fig. 1, the boiler 1 includes a furnace 2 extending cylindrically continuously in a vertical direction VD, a wind box front panel 3a that is provided horizontally at an interval from a side wall 2s of the furnace 2 and covers the furnace 2 from the outside, and a plurality of burner guns 5 disposed on the outside of the furnace 2. In the boiler 1, fuel F such as light oil or heavy oil and spray medium G consisting of air or steam are injected from the burner gun 5 into the furnace 2, and the injected fuel F is burned in the furnace 2. Examples of fuel F include petroleum such as heavy oil or light oil, various process waste liquids, liquefied ammonia, etc., and are supplied to the burner gun 5 in a liquid state.

[0013] The burner gun 5 includes a fuel transport pipe 11 for transporting the fuel F, a spray medium transport pipe 12 for transporting the spray medium G, a nozzle 13, and a piping connection member 20. The burner gun 5 injects the fuel F and the spray medium G into the furnace 2 and is detachable from the boiler 1.

[0014] The fuel conveying pipe 11 and the spray medium conveying pipe 12 are each formed of, for example, a metal pipe material. The fuel conveying pipe 11 and the spray medium conveying pipe 12 have base ends 11a, 12a connected to a piping connection member 20, and tip ends 11b, 12b connected to a nozzle 13 via flexible hoses 14, 15. The fuel conveying pipe 11 and the spray medium conveying pipe 12 each have straight pipe sections 11s, 12s that extend linearly at a certain length on the tip end sides 11b, 12b.

[0015] The nozzle 13 injects the fuel F transported through the fuel transport pipe 11 and the spray medium G transported through the spray medium transport pipe 12 into the furnace 2. The nozzle 13 is connected to the tips 11b, 12b of the fuel transport pipe 11 and the spray medium transport pipe 12 via flexible hoses 14, 15. The nozzle 13 is a so-called two-fluid injection valve that atomizes the fuel F with the spray medium G and injects it.

[0016] 1, the pipe connection member 20 is a member that supplies fuel F to the fuel conveying pipe 11 via the connecting fitting 30, and supplies spray medium G to the spray medium conveying pipe 12 via the connecting fitting 30. The pipe connection member 20 is detachably fixed to the connecting fitting 30.

[0017] The wind box 3 further includes a connecting fitting 30, a guide tube (first tube portion) 40, a compressed air supply unit 50, and a flame stabilizer 60.

[0018] The connection fitting 30 is fixed to the wind box 3 and supplies the fuel F to the fuel transport pipe 11 and the spray medium G to the spray medium transport pipe 12 via the piping connection member 20 .

[0019] The guide tube 40 is a tube into which the fuel transport pipe 11 and the spray medium transport pipe 12 of the burner gun 5 are detachably inserted. The guide tube 40 is formed in a cylindrical shape so as to extend along the axis X. The burner gun 5 is formed so as to extend along the axis X, with a nozzle 13 formed at its end for spraying the fuel F and the spray medium G toward the furnace 2.

[0020] The compressed air supply unit 50 is fixed to the connecting fitting 30, and is a device that supplies compressed air Ap toward the inside of the guide tube 40. The compressed air supply unit 50 supplies compressed air Ap to prevent combustion gases and the like in the furnace 2 from entering the guide tube 40 when the burner gun 5 is removed from the guide tube 40.

[0021] The compressed air supply unit 50 supplies compressed air Ap, which is supplied from a compressed air supply source 51 via a compressed air supply path 52, from injection ports 53 provided at multiple locations around the axis X toward the inside of the guide tube 40. The supply state of the compressed air Ap from the compressed air supply path 52 to the injection ports 53 is switched by a switching valve 52a.

[0022] The flame stabilizer 60 is disposed at the end of the guide tube 40 on the furnace 2 side, and is a device that imparts a swirling force to the combustion air Ac supplied to the furnace 2. The combustion air Ac is introduced into the wind box 3, passes through the flame stabilizer 60 and the outer periphery of the flame stabilizer 60, and is supplied to the furnace 2. As shown in Fig. 2, the flame stabilizer 60 has an inner tube 61 and an outer tube 62 that are formed in an annular shape around the axis X, and a plurality of swirl vanes 63 that are disposed in the circumferential direction around the axis X so as to connect both the inner tube 61 and the outer tube 62.

[0023] 1 and 2 is a swirler type flame stabilizer having swirl vanes 63, but may be in other forms. For example, instead of the swirl vanes 63, a plate-shaped diffuser type flame stabilizer with a closed surface on the furnace 2 side may be used. In the case of a diffuser type flame stabilizer, the combustion air impinging on the flame stabilizer forms a swirling flow on the outer periphery of the flame stabilizer.

[0024] Next, a method for removing the deposit 200 adhering to the flame stabilizer 60 will be described. As shown in Fig. 1 and Fig. 2, deposits are attached to the end face of the flame stabilizer 60 on the furnace 2 side so as to surround the nozzle 13 of the burner gun 5 around the axis X. The deposits 200 are, for example, carbonized carbon in the fuel F or solidified ash. As shown in Fig. 2, the deposits 200 are, for example, formed in a ring shape so as to surround the nozzle 13 around the axis X.

[0025] As shown in Fig. 2, the nozzle 13 is formed with a plurality of injection holes 13a for injecting the fuel F and the spray medium G. In the example shown in Fig. 2, six injection holes 13a are formed around the axis X. As shown in Fig. 1, the fuel F and the spray medium G injected from the injection holes 13a are injected toward a radial injection range S centered on the axis X.

[0026] 1, when the deposit 200 grows, the tip of the deposit 200 interferes with the injection range S. When the fuel F is injected toward the tip of the deposit 200, a part of the fuel F collides with the deposit 200 and is bounced back, and may enter the inside of the guide tube 40 or the inside of the wind box 3 via the flame stabilizer 60. Therefore, in this embodiment, the burner gun 5 is removed from the guide tube 40, and then the deposit removal tube (second tube portion) 110 is inserted into the guide tube 40, and the deposit 200 is removed from the flame stabilizer 60.

[0027] FIG. 3 is a flowchart showing a method for removing adhering matter according to one embodiment of the present disclosure. In step S101, an operator performs a removal process to remove the burner gun 5 from the guide tube 40. The operator removes the piping connection member 20 of the burner gun 5 from the connection fitting 30, and removes the fuel transport pipe 11 and the spray medium transport pipe 12 from the guide tube 40 along the axis X. When the burner gun 5 is removed from the guide tube 40, it is in the state shown in Fig. 4. Fig. 4 is a vertical cross-sectional view showing the burner gun 5 shown in Fig. 1 removed from the wind box 3.

[0028] In step S102, the worker performs an insertion process of inserting the deposit removal tube 110 into the guide tube 40 with the burner gun 5 removed from the guide tube 40. When the insertion process is performed, the state shown in Fig. 5 changes to the state shown in Fig. 6. Fig. 5 is a vertical cross-sectional view showing a state in which the deposit removal tube 110 is being inserted into the guide tube 40 of the boiler 1 from which the burner gun 5 has been removed. Fig. 6 is a vertical cross-sectional view showing a state in which the deposit removal tube 110 has been inserted into the guide tube 40 of the boiler 1 from which the burner gun 5 has been removed.

[0029] As shown in FIGS. 5 and 6, the deposit removal device 100 of this embodiment includes an deposit removal cylinder (second cylinder portion) 110 and a removal medium supply unit 120. The deposit removal cylinder 110 is a cylinder having a diameter of 100 mm.

[0030] The deposit removal cylinder 110 is a cylinder that is detachably inserted into the guide cylinder 40 in a state in which the burner gun 5 is removed from the guide cylinder 40. The deposit removal cylinder 110 is formed in a cylindrical shape extending along the axis X.

[0031] The removal medium supply unit 120 is a device that supplies the removal medium E to the deposit removal tube 110 to remove deposits adhering to the inside of the guide tube 40 or near the tip on the furnace 2 side, and deposits 200 adhering to the flame stabilizer 60. The removal medium E is, for example, steam or compressed gas (compressed air, etc.). The removal medium supply unit 120 has a removal medium supply path 121 to which the removal medium E is supplied from a removal medium supply source 123, and a switching valve 122 that switches between a supply state in which the removal medium E is supplied from the removal medium supply path 121 to the deposit removal tube 110 and a cutoff state in which the removal medium E is not supplied from the removal medium supply path 121 to the deposit removal tube 110.

[0032] As shown in Fig. 6, the deposit removal tube 110 has a first end 110a on the furnace 2 side where an injection port 111 for injecting the removal medium is formed, and a second end 110b on which an inlet 112 for allowing the removal medium guided to the injection port 111 to flow into the inside is formed. As shown in Fig. 6, the deposit removal tube 110 is inserted into the guide tube 40 so that the injection port 111 advances to a position protruding toward the furnace 2 side beyond the end 40a of the guide tube 40 on the furnace 2 side.

[0033] 6, the deposit removal cylinder 110 includes a main body 110A, an annular member 110B, and a positioning member 110C. The main body 110A is a cylinder having a first outer diameter D1 and through which the removal medium E flows. The annular member 110B is a member attached to a portion of the outer circumferential surface of the main body 110A between the first end 110a and the second end 110b. The annular member 110B has a second outer diameter D2 that is larger than the first outer diameter D1.

[0034] The annular member 110B is a member that comes into contact with the inner circumferential surface of the guide tube 40 when the deposit removal tube 110 is inserted into the guide tube 40. Since the annular member 110B comes into contact with the inner circumferential surface of the guide tube 40, the central axis of the main body 110A can be held at a position close to the axis X. Furthermore, when the deposit removal tube 110 is removed from the guide tube 40 in step S104 described later, the annular member 110B is moved while being in contact with the inner circumferential surface of the guide tube 40, so that the fuel F and solids containing the fuel F that are attached to the inner circumferential surface of the guide tube 40 can be scraped out to the outside of the guide tube 40.

[0035] The positioning member 110C is a member attached to the outer peripheral surface near the second end 110b of the main body 110A. The positioning member 110C is a member for allowing the worker to recognize the position along the axis X of the first end 110a of the deposit removal tube 110, which cannot be seen by the worker. For example, by maintaining the positioning member 110C partially inserted into the connecting fitting 30, the worker can maintain the state in which the injection port 111 has advanced to a position protruding toward the furnace 2 side beyond the end 40a of the guide tube 40 on the furnace 2 side.

[0036] Fig. 7 is a partially enlarged view showing the first end 110a of the deposit removal tube 110. Fig. 8 is a cross-sectional view taken along the line AA of the deposit removal tube 110 shown in Fig. 7. As shown in Figs. 7 and 8, a plurality of jet ports 111 having a circular shape in a plan view are formed in the first end 110a of the deposit removal tube 110. The jet ports 111 are arranged at a plurality of locations (four locations in Fig. 7) at intervals along the axis X. The jet ports 111 are arranged at a plurality of locations (four locations in Fig. 8) in the circumferential direction around the axis X.

[0037] By arranging the injection ports 111 at multiple locations at intervals both in the direction along the axis X and in the circumferential direction around the axis X, the removal medium E can be injected toward the vicinity of the guide tube 40 and the entire deposit 200. As shown in Fig. 8, the end of the deposit removal tube 110 on the furnace 2 side is closed by a tip end surface 110a1. The removal medium E guided from the second end 110b to the first end 110a of the deposit removal tube 110 is guided toward the injection port 111 from the internal space closed by the tip end surface 110a1.

[0038] The injection port 111 formed at the first end 110a of the deposit removal tube 110 may be an injection port 111A of a modified example shown in Fig. 9 and Fig. 10. Fig. 9 is a partially enlarged view showing a modified example of the first end 110a of the deposit removal tube 110. Fig. 10 is a cross-sectional view of the deposit removal tube 110 shown in Fig. 9 along the arrow BB. As shown in Fig. 9 and Fig. 10, a plurality of injection ports 111A having a circular shape in a plan view are formed at the first end 110a of the deposit removal tube 110. The injection ports 111A are arranged at a plurality of locations (four locations in Fig. 10) in the circumferential direction around the axis X.

[0039] 9, the injection port 111A is formed in a slit shape in which a first width W1 along the axis X is wider than a second width W2 along the circumferential direction about the axis X. The first width W1 and the second width W2 are set arbitrarily depending on the size and properties of the deposit 200 adhering to the vicinity of the guide tube 40 and the flame stabilizer 60.

[0040] In step S103, the worker executes a removal medium supplying step of supplying the removal medium E to the deposit removal tube 110 to remove deposits adhering to the vicinity of the guide tube 40 and the flame stabilizer 60. The worker switches the switching valve 122 of the removal medium supply unit 120 from a shutoff state to a supply state so as to spray the removal medium E from the nozzle 111. When the switching valve 122 switches from a shutoff state to a supply state, the removal medium E is sprayed toward the deposits 200 adhering to the vicinity of the guide tube 40 and the flame stabilizer 60 from the nozzle 111, which has advanced to a position protruding toward the furnace 2 side beyond the end 40a of the guide tube 40 on the furnace 2 side.

[0041] For example, when the nozzle 111 has advanced to a position protruding toward the furnace 2 beyond the end 40a of the guide tube 40 on the furnace 2 side, the operator switches the switching valve 122 from the supply state to the cutoff state after a predetermined time has elapsed since starting to spray the removal medium E from the nozzle 111. The removal medium supply process stops spraying the removal medium E from the nozzle 111 in response to the predetermined time having elapsed since starting to spray the removal medium E from the nozzle 111. The predetermined time is set, for example, to a time sufficient for the removal medium sprayed from the nozzle 111 to remove deposits adhering to the vicinity of the guide tube 40 and the flame stabilizer 60.

[0042] In the removal medium supply process of step S103, the operator may rotate the deposit removal tube 110 about the axis X in a state where the injection port 111 has advanced to a position where it protrudes toward the furnace 2 side beyond the end 40a of the guide tube 40 on the furnace 2 side. By rotating the deposit removal tube 110 about the axis X in a state where the removal medium E is injected from the injection port 111, the removal medium E can be injected to the deposit 200 present at each position around the axis X, and the deposit 200 can be effectively removed from the vicinity of the guide tube 40 and the flame stabilizer 60.

[0043] In addition, in the removal medium supply process of step S103, the operator may reciprocate the deposit removal tube 110 along the axis X so as to continuously switch between a state in which the injection port 111 advances to a position where it protrudes toward the furnace 2 side beyond the end 40a of the guide tube 40 on the furnace 2 side, and a state in which the injection port 111 advances to a position where it does not protrude toward the furnace 2 side beyond the end 40a of the guide tube 40 on the furnace 2 side. By reciprocating the deposit removal tube 110 along the axis X in a state in which the removal medium E is injected from the injection port 111, the removal medium E can be injected to the deposit 200 at each position along the axis X, and the deposit 200 can be effectively removed from the vicinity of the guide tube 40 and the flame stabilizer 60.

[0044] In step S104, the worker performs a removal process to remove the deposit removal tube 110 from the guide tube 40. When the removal process is performed, the state shown in Fig. 6 changes to the state shown in Fig. 5, and then to the state shown in Fig. 4. Since the removal medium supply process in step S103 has been performed, it is assumed that the deposit 200 shown in Figs. 4 and 5 has been mostly removed from the vicinity of the guide tube 40 and the flame stabilizer 60.

[0045] In step S105, the worker performs an insertion step of inserting the burner gun 5 removed from the guide tube 40 in step S101 into the guide tube 40. The worker inserts the fuel delivery pipe 11 and the spray medium delivery pipe 12 into the guide tube 40 along the axis X, and attaches the piping connection member 20 of the burner gun 5 to the connection fitting 30. When the burner gun 5 is inserted into the guide tube 40, it is in the state shown in FIG.

[0046] The deposit removal device 100 of the present embodiment described above provides the following actions and effects. According to the deposit removal device 100 of this embodiment, the deposit removal tube 110 is inserted into the guide tube 40 with the burner gun 5 removed from the guide tube 40. The deposit removal tube 110 is inserted into the guide tube 40 so that the injection port 111 formed in the first end 110a advances to a position protruding toward the furnace 2 side from the end 40a of the guide tube 40 on the furnace 2 side. When the removal medium E is supplied from the removal medium supply unit 120 to the deposit removal tube 110, the removal medium E is sprayed from the injection port 111 formed in the first end 110a. Since the injection port 111 is disposed at a position protruding toward the furnace 2 side from the end 40a of the guide tube 40 on the furnace 2 side, the removal medium E sprayed from the injection port 111 is injected toward the deposit 200. In this way, according to the deposit removal device 100 of this embodiment, the deposit 200 attached to the vicinity of the guide tube 40 or the flame stabilizer 60 can be removed without stopping the boiler 1.

[0047] Furthermore, according to the deposit removal device 100 of this embodiment, when the deposit removal tube 110 is inserted into the guide tube 40, the annular member 110B comes into contact with the inner circumferential surface of the guide tube 40, so that the central axis of the main body 110A can be held at a position close to the axis X. Furthermore, when the deposit removal tube 110 is removed from the guide tube 40, the annular member 110B is moved while being in contact with the inner circumferential surface of the guide tube 40, so that the fuel and solids containing fuel adhering to the inner circumferential surface of the guide tube 40 can be scraped out to the outside of the guide tube 40.

[0048] According to the method for removing adhesions of this embodiment, by rotating the adhesion removal tube 110 around the axis X while the removal medium E is being sprayed from the nozzle 111, the removal medium E can be sprayed onto the adhesions 200 present at each position around the axis X, thereby effectively removing the adhesions 200.

[0049] The deposit removal device 100 and the deposit removal method according to the above-described embodiments can be understood, for example, as follows. The deposit removal device according to the first aspect of the present disclosure includes a first cylindrical portion (40) into which a burner (5) is detachably inserted, the burner having a nozzle formed at an end thereof for injecting fuel toward a furnace (2) and formed to extend along an axis (X), a second cylindrical portion (110) which is detachably inserted into the first cylindrical portion in a state in which the burner is removed from the first cylindrical portion and is formed to extend along the axis, and a nozzle for removing deposits adhering to the vicinity of the first cylindrical portion. and a removal medium supply section (120) that supplies the removal medium (E) to the second cylindrical section, the second cylindrical section having a first end (110a) that is formed with an injection port (111) for injecting the removal medium and that is positioned on the furnace side, and a second end (110b) that is formed with an inlet (110b) for allowing the removal medium guided to the injection port to flow into the interior, the second cylindrical section being inserted into the first cylindrical section such that the injection port advances to a position that protrudes toward the furnace side beyond the end of the first cylindrical section on the furnace side.

[0050] According to the deposit removal device according to the first aspect of the present disclosure, the second cylindrical part is inserted into the first cylindrical part with the burner removed from the first cylindrical part. The second cylindrical part is inserted into the first cylindrical part so that the nozzle formed at the first end part advances to a position protruding toward the furnace side beyond the furnace side end part of the first cylindrical part. When the removal medium is supplied from the removal medium supply part to the second cylindrical part, the removal medium is sprayed from the nozzle formed at the first end part. Since the nozzle part is disposed at a position protruding toward the furnace side beyond the furnace side end part of the first cylindrical part, the removal medium sprayed from the nozzle part is sprayed toward the deposit. In this manner, according to the deposit removal device according to the first aspect of the present disclosure, the deposit can be removed without stopping the boiler.

[0051] The deposit removal device according to the second aspect of the present disclosure further includes the following configuration in the first aspect: That is, the removal medium is injected from the injection port that advances to a position protruding toward the furnace side beyond the furnace side end of the first cylindrical portion toward the deposit that is attached to a flame stabilizer that is disposed at the furnace side end of the first cylindrical portion and applies a swirling force to the combustion air supplied to the furnace.

[0052] According to the deposit removal device according to the second aspect of the present disclosure, deposits adhering to a flame stabilizer that imparts a swirling force to the combustion air supplied to a furnace can be removed without stopping the boiler.

[0053] The deposit removal device according to a third aspect of the present disclosure is the first or second aspect, further comprising the following configuration, that is, the removal medium is steam or compressed gas. According to the deposit removal device according to the third aspect of the present disclosure, steam or compressed air is sprayed from the nozzle toward the deposit, so that the deposit can be suitably removed without stopping the boiler.

[0054] The deposit removal device according to the fourth aspect of the present disclosure is the first or second aspect, and further includes the following configuration: The second cylindrical portion has a main body portion (110A) through which the removal medium flows and has a first outer diameter (D1), and an annular member (110B) attached to a part of the main body portion between the first end and the second end and having a second outer diameter (D2) larger than the first outer diameter.

[0055] According to the deposit removal device according to the fourth aspect of the present disclosure, when the second cylindrical portion is inserted into the first cylindrical portion, the annular member comes into contact with the inner circumferential surface of the first cylindrical portion, so that the central axis of the main body can be held in a position close to the axis. Also, when the second cylindrical portion is removed from the first cylindrical portion, the annular member is moved while in contact with the inner circumferential surface of the first cylindrical portion, so that the fuel and solids containing fuel adhering to the inner circumferential surface of the first cylindrical portion can be scraped out to the outside of the first cylindrical portion.

[0056] The deposit removal device according to the fifth aspect of the present disclosure is the first or second aspect, further comprising the following configuration: The injection port is formed in a slit shape having a first width (W1) along the axis line wider than a second width (W2) along a circumferential direction about the axis line.

[0057] According to the fifth aspect of the present disclosure, the removal medium is sprayed from a slit-shaped injection port, so that the removal medium can be sprayed from the entire area of ​​the first width along the axis X to remove the adhesions.

[0058] The deposit removal device according to a sixth aspect of the present disclosure is the first or second aspect, further including the following configuration: That is, the second cylindrical portion is formed with a plurality of the injection ports at a plurality of positions around the axis.

[0059] According to the deposit removal device according to the sixth aspect of the present disclosure, the removal medium can be sprayed from a plurality of spray ports formed at a plurality of positions around the axis.

[0060] The deposit removal method according to a seventh aspect of the present disclosure includes a removal step (S101) of removing a burner, which is formed to extend along the axis and has a nozzle at its end for injecting fuel toward a furnace, from a first cylindrical portion formed in a cylindrical shape so as to extend along the axis; an insertion step (S102) of inserting a second cylindrical portion formed in a cylindrical shape so as to extend along the axis into the first cylindrical portion with the burner removed from the first cylindrical portion; and a removal medium supply step (S103) of supplying a removal medium to the second cylindrical portion for removing deposits adhering near the first cylindrical portion, wherein the second cylindrical portion has a first end portion formed with an injection port for injecting the removal medium and positioned on the furnace side, and a second end portion formed with an inlet for flowing the removal medium guided to the injection port into the interior thereof, and in the insertion step, the second cylindrical portion is inserted into the first cylindrical portion so that the injection port advances to a position protruding toward the furnace side beyond the furnace side end of the first cylindrical portion.

[0061] According to the deposit removal method according to the seventh aspect of the present disclosure, the second cylindrical part is inserted into the first cylindrical part with the burner removed from the first cylindrical part. The second cylindrical part is inserted into the first cylindrical part so that the nozzle formed at the first end part advances to a position protruding toward the furnace side beyond the furnace side end part of the first cylindrical part. When the removal medium is supplied from the removal medium supply part to the second cylindrical part, the removal medium is sprayed from the nozzle formed at the first end part. Since the nozzle part is disposed at a position protruding toward the furnace side beyond the furnace side end part of the first cylindrical part, the removal medium sprayed from the nozzle part is sprayed toward the deposit. In this manner, according to the deposit removal method according to the seventh aspect of the present disclosure, the deposit can be removed without stopping the boiler.

[0062] The deposit removal method according to an eighth aspect of the present disclosure is the seventh aspect, further including the following configuration: In the removal medium supplying step, the second cylindrical portion is rotated around the axis in a state in which the injection port is inserted to a position protruding toward the furnace side beyond the furnace side end of the first cylindrical portion.

[0063] According to the method for removing adhesions according to the eighth aspect of the present disclosure, by rotating the second cylindrical portion about the axis while the removal medium is being sprayed from the nozzle, the removal medium can be sprayed onto adhesions present at each position about the axis, thereby effectively removing the adhesions.

[0064] The deposit removal method according to a ninth aspect of the present disclosure is the eighth aspect, further comprising the following configuration: In the removal medium supplying step, the ejection of the removal medium from the ejection port is stopped in response to a lapse of a predetermined time from the start of ejection of the removal medium from the ejection port.

[0065] According to the deposit removal method according to the ninth aspect of the present disclosure, deposits can be reliably removed by spraying the removal medium from the spray nozzle for a predetermined period of time. [Explanation of symbols]

[0066] 1. Boiler 2 Furnace 2s side wall 3 Wind box 3a Wind box front plate 5. Burnagan 11 Fuel transport pipe 12 Spray medium transport pipe 13 Nozzle 13a injection hole 14,15 Flexible hose 20 Piping connection parts 30 Connection fittings 40 Guide tube (first tube part) 40a End 50 Compressed air supply unit 51 Compressed air supply source 52 Compressed air supply line 52a Switching valve 53 Nozzle 60 Flame holder 61 Inner cylinder 62 Outer cylinder 63 Swirling blades 100 Deposit removal device 110 Adhesion removal tube (second tube part) 110A Main unit 110B Circular member 110C Positioning member 110a 1st end 110a1 Tip surface 110b Second end 111 Nozzle 111A Nozzle 112 Inlet 120 Removal medium supply section 121 Removal medium supply path 122 Switching valve 123 Removal media source 200 Adhesion Ac Combustion Air Ap Compressed Air D1 1st outer diameter D2 2nd outer diameter E removal medium F fuel G Spray media S Spray range VD Vertical direction X axis

Claims

1. a first cylindrical portion into which a burner is removably inserted, the burner having a nozzle formed at an end thereof for injecting fuel toward the furnace and extending along an axis; and A second cylindrical portion that is detachably inserted into the first cylindrical portion in a state in which the burner is removed from the first cylindrical portion and is formed in a cylindrical shape so as to extend along the axis; a removal medium supplying section that supplies a removal medium to the second cylindrical section for removing deposits adhering to the vicinity of the first cylindrical section, The second cylindrical portion has a first end portion in which an injection port for injecting the removal medium is formed and which is disposed on the furnace side, and a second end portion in which an inlet port for allowing the removal medium guided to the injection port to flow therein is formed, The second cylindrical portion is an attachment removal device that is inserted into the first cylindrical portion so that the injection nozzle enters a position where it protrudes toward the furnace side beyond the furnace side end of the first cylindrical portion.

2. The deposit removal device described in claim 1, wherein the removal medium is sprayed from the injection port, which penetrates to a position protruding toward the furnace side beyond the furnace side end of the first cylindrical portion, toward the deposit adhering to a flame stabilizer that is located at the furnace side end of the first cylindrical portion and imparts a swirling force to the combustion air supplied to the furnace.

3. 3. The deposit removal device according to claim 1, wherein the removal medium is steam or compressed gas.

4. The adhesion removal device described in claim 1 or claim 2, wherein the second tubular portion has a main body portion through which the removal medium flows and has a first outer diameter, and an annular member attached to a portion of the main body portion between the first end and the second end and having a second outer diameter larger than the first outer diameter.

5. 3. The deposit removal device according to claim 1, wherein the injection port is formed in a slit shape having a first width along the axis line that is greater than a second width along a circumferential direction about the axis line.

6. 3. The deposit removal device according to claim 1, wherein the second cylindrical portion has a plurality of the injection ports formed at a plurality of positions around the axis.

7. a removal process of removing a burner from a first cylindrical portion formed in a cylindrical shape so as to extend along an axis line, the burner having a nozzle formed at an end thereof for injecting fuel toward the furnace and formed so as to extend along the axis line; an insertion step of inserting a second cylindrical portion formed in a cylindrical shape so as to extend along the axis into the first cylindrical portion with the burner removed from the first cylindrical portion; a removal medium supplying step of supplying a removal medium to the second cylindrical portion to remove deposits adhering to the vicinity of the first cylindrical portion, The second cylindrical portion has a first end portion in which an injection port for injecting the removal medium is formed and which is disposed on the furnace side, and a second end portion in which an inlet port for allowing the removal medium guided to the injection port to flow therein is formed, A method for removing adhesion material, in which, in the insertion process, the second cylindrical portion is inserted into the first cylindrical portion so that the injection nozzle penetrates to a position where it protrudes toward the furnace further than the furnace side end of the first cylindrical portion.

8. 8. The method for removing adhesion material according to claim 7, wherein, in the removal medium supply process, the second cylindrical portion is rotated around the axis while the injection nozzle is inserted to a position protruding toward the furnace side beyond the furnace side end of the first cylindrical portion.

9. The method for removing adhesion material according to claim 7 or claim 8, wherein the removal medium supplying step stops spraying of the removal medium from the nozzle in response to a predetermined time having elapsed since spraying of the removal medium from the nozzle was started.

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