JP2015055425A - Clinker removal device and method for installing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clinker removal device facilitating manual work with a simple structure, and capable of efficiently removing clinker adhering to or deposited on a throat part of a plurality of burners or ports installed in a boiler in a limited period of time, and a method for installing the clinker removal device.SOLUTION: In the clinker removal device, a lance tube (2) is prepared by connecting a first lance tube (2-1) having a nozzle (1) for injecting high pressure injection fluid, a second lance tube (2-3) having a fluid introduction part (7) for introducing the high pressure injection fluid from the outside in an end, and an intermediate lance tube (2-2) provided between the first and third lance tubes (2-1 and 2-3) and having connecting parts (4-1 and 4-2) for connecting the first and second lance tubes (2-1 and 2-3) on both ends, and a plurality of guide members (3) are provided which are slidable in a gap between the lance tube (2) and a sleeve-like member (5) arranged on an outer peripheral surface of the tube (2) by penetrating a furnace wall.

Description

  The present invention is directed to a clinker that adheres and accumulates in the vicinity of a throat portion (furnace opening) of various ports that mainly eject a burner or a two-stage combustion gas (mainly air) in a boiler facility such as a thermal power plant. The present invention relates to a clinker removing device that ejects and removes a high-pressure fluid and a method of installing the clinker removing device.

  Various types of ports (OFA; Over-firing Airport, AAP; After Air Port, SAP; Side Air Port, etc.) for jetting burner and two-stage combustion gas. In some cases, clinker generated from ash in the fuel adheres to the vicinity of the throat portion opened in the furnace. In particular, a solid fuel typified by pulverized coal contains a large amount of ash and the like, so clinker attached in the circumferential direction of the throat portion grows in a lump.

  As an apparatus for removing this, claim 1 of Patent Document 1 (Japanese Patent No. 3547817) states that “It is formed so that it can be rotatably inserted in place of the oil burner at the axial center position of the pulverized coal burner. A cylinder, a main injection nozzle that is drilled so as to be able to inject a clinker-removing injection flow radially outward at the tip of the cylinder, and an injection flow that interferes with the injection flow of the main injection nozzle A sub-injection nozzle perforated at the tip of the cylinder adjacent to the main injection nozzle so as to form a combined injection flow, and a base end of the cylinder relative to the main injection nozzle and the sub-injection nozzle There is disclosed a “clinker removing device” including an ejection fluid flow path formed inside a cylinder so that the ejection fluid can be supplied from a portion.

  Further, Patent Document 2 (Japanese Patent Laid-Open No. 2000-111296) discloses a heat transfer tube deposit removal device for removing hard clinker attached to a suspended heat transfer tube inside a boiler. This is done by inserting a long arm with a nozzle that ejects a high-speed water jet at the tip from the observation window on the boiler wall so that the nozzle approaches the suspended heat transfer tube from which the clinker is to be removed. It is something to operate from.

  Further, in Patent Document 3 (Japanese Patent Laid-Open No. 9-61087), as a heat transfer tube deposit removal device, a nozzle manipulator provided with a nozzle for ejecting high-pressure water from the manhole of a boiler is inserted into the boiler furnace. An apparatus for removing clinker-like deposits adhering to a heat transfer tube or the like is disclosed.

  Further, in Patent Document 4 (Japanese Patent Laid-Open No. 11-182758), an engagement groove is provided on one of pipe end portions (elastically deformable) of a connection portion between pipes for ensuring connection between pipes, and the other. It is disclosed that a plurality of pipes can be easily connected by providing protrusions locked to the engaging grooves respectively.

  Further, in Patent Document 5 (Japanese Utility Model Publication No. 3-1468), when the tip of the lance pipe is melted and shortened, a short pipe can be connected to the rear end to ensure a necessary pipe length. A configuration is disclosed.

Japanese Patent No. 3547817 JP 2000-1111296 A Japanese Patent Laid-Open No. 9-61087 JP-A-11-182758 Japanese Utility Model No.3-1468

  The invention described in Patent Document 1 is intended to provide a clinker removing device that can efficiently and safely remove clinker adhered and deposited around the throat of a pulverized coal burner even during operation of boiler equipment. The clinker removal work performed using the clinker removal apparatus or the like is highly necessary to be performed even before the operation of maintenance / inspection in the furnace by stopping the operation of the boiler equipment.

  That is, the clinker has a difference in thermal expansion (shrinkage) from a member such as a burner, and what is firmly attached to the surface of the member during operation is likely to fall off due to partial peeling by cooling. Become. Since it is dangerous to drop such a clinker during work in the furnace, it is necessary to remove it in advance, and a high-pressure fluid is jetted toward the site where the clinker adheres and accumulates, that is, in the circumferential direction of the throat part. It is desirable to use a clinker removal device that can remove this.

  On the other hand, a large number of burners and ports are installed on the wall of the boiler, and clinker is attached to all burners and ports during a limited period from shutdown to maintenance / inspection. The amount of work to remove is enormous. Although it is a device that removes the clinker using a high-pressure fluid, it is only manually handled when it is finally brought into the location where it will be used, so consideration for portability, ease of assembly, and operability is important.

  In the invention described in Patent Literature 2, the clinker is removed from a suspended heat transfer tube inside the boiler, a long nozzle arm is inserted from the observation window on the boiler wall surface, and this is operated from the outside of the furnace. Is a heat transfer tube adhering substance removing device that brings water close to the site where the clinker adheres and sprays a water jet. Therefore, it involves manual work in a narrow space required for an apparatus for removing clinker adhering to the throat part of a large number of burners and ports targeted by the present invention, or in a limited part called the throat part. No special consideration has been given to measures such as a clinker removing operation or removing a clinker adhering in the circumferential direction of the throat portion.

Although the nozzle manipulator described in Patent Document 3 is operated from the outside of the boiler, it is not possible to remove the clinker at a location where the tip of the nozzle manipulator does not reach.
The invention described in Patent Document 4 can easily connect a plurality of elastically deformable pipes, but does not disclose connecting pipes through a boiler furnace wall surface.

  Further, the invention described in Patent Document 5 discloses a configuration in which when a tip end portion of a lance pipe is melted and shortened, a short pipe is connected to a rear end portion to ensure a necessary pipe length. In such a configuration, when a long lance tube passed through an elongated sleeve-like member as in the present invention is manually operated in the longitudinal direction and the circumferential direction, the outer peripheral surface of the lance tube is long on the inner wall surface of the sleeve-like member. It is conceivable that contact is made in a range, and a tubular member is fitted in the elongated groove, so that manual operation becomes difficult. In the invention described in Patent Document 5, a high-pressure fluid is ejected from a nozzle provided on the side surface of the tip of the lance tube, so that a moment due to the reaction force acts on the connecting portion, and the connecting portion is deformed (clicked). May occur.

  An object of the present invention is to remove a clinker that can easily remove a clinker adhering and depositing on a throat portion of a burner or a port installed in a boiler for a limited period of time with a simple configuration that is easy to work manually. It is providing the installation method of an apparatus and this clinker removal apparatus.

In order to solve the above problems, the present invention provides the following solution.
The invention described in claim 1
1) A first lance tube (2-1) provided with a nozzle (1) for injecting a high-pressure injection fluid (9) on a side surface in the vicinity of an axial tip.
2) a second lance tube (2-3) provided with a fluid introduction part (7) for introducing a high-pressure jet fluid from the outside to the end part;
3) Between the first lance tube (2-1) and the second lance tube (2-3), the first and second lance tubes (2-1, 2-3) are arranged at both ends in the axial direction. At least one intermediate lance tube (2-2) provided with a connecting part (4-1, 4-2) to be connected at each part
A straight tubular lance tube (2) connected with
A plurality of guide members (3) that allow the lance tube (2) to slide inside the sleeve-like member (5) installed through the boiler furnace wall are provided on the outer periphery of the lance tube (2). A clinker removing device provided.

  According to the second aspect of the present invention, the working space in which each lance tube (2-1, 2-2, 2-3) can be inserted into the sleeve-like member (5) from the outside of the furnace wall is formed outside the furnace wall. The clinker removing device according to claim 1, wherein the clinker removing device is provided.

  The invention as set forth in claim 3 is characterized in that the plurality of guide members (3) are all arranged at positions in contact with the inner peripheral surface of the sleeve-like member (5) corresponding to the thickness of the furnace wall. Or it is a clinker removal apparatus of 2 description.

  According to the fourth aspect of the present invention, the first guide member (3-1) disposed inside the furnace among the plurality of guide members (3) is a first lance tube (2-1) with a nozzle (1). ) And the nozzle (1) side of the connecting portion (4-1) with the intermediate lance tube (2-2) adjacent to the first lance tube (2-1). The clinker removing apparatus according to claim 3.

  According to the fifth aspect of the present invention, the connecting portion (4-1) between the adjacent first lance tube (2-1) and the intermediate lance tube (2-2), the intermediate lance tube (2-2), and the second lance tube (2-2). The connecting portions (4-2) of the lance tube (2-3) are connected by screwing, and the contact surfaces of the first lance tube (2-1) and the intermediate lance tube (2-2) and the intermediate lance tube The clinker removing device according to any one of claims 1 to 4, wherein a star washer (14) is interposed between the contact surfaces of (2-2) and the second lance tube (2-3). It is.

According to the sixth aspect of the present invention, the fluid introduction part (outside the furnace) from the insertion port (6) of the sleeve-like member (5) provided in advance in the penetration part of the boiler furnace wall into which the straight tubular lance tube (2) is inserted. 7) divide the straight tubular lance tube (2) into at least two parts so that it is long enough to fit in between
The first lance tube (2-1) to be inserted into the front end portion inside the furnace is provided with a nozzle (1) for high-pressure fluid injection, and each divided body of the straight tubular lance tube (2) divided into at least two parts is sequentially screwed. The second lance tube (2-3) outside the furnace is connected by a joint connection, and a fluid introduction part (7) for introducing a high-pressure jet fluid from the outside is provided,
Further, one or more guide members (3) are wound around the outer peripheral portion of the straight tubular lance tube (2), and the straight tubular lance tube (2) and the guide member (3) are inserted into the sleeve-like member (5). It is the installation method of the clinker removal apparatus to the boiler furnace wall characterized by the above-mentioned.

  According to the first aspect of the present invention, a straight tube in which at least one intermediate lance tube (2-2) is connected between the first lance tube (2-1) and the second lance tube (2-3). A clinker removing device having a simple configuration in which the lance tube (2) is slidable by the plurality of guide members (3) inside the sleeve-like member (5) installed through the boiler furnace wall, is obtained. With a configuration that is easy to carry, assemble and operate by hand, it is possible to remove clinker adhering to and accumulating on the throat part of many burners and ports installed in the boiler.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, each lance tube (2-1, 2-2, 2-3) is connected to the sleeve-like member (5) from the outside of the furnace wall. ) Has a working space that can be inserted inside the furnace wall, so that even if the length of the straight tubular lance tube (2) becomes longer, each lance tube (2-1, 2-2, 2-3) The straight tubular lance tube (2) can be configured by connecting them while sequentially inserting them.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the plurality of guide members (3) are all inner peripheral surfaces of the sleeve-like member (5) corresponding to the thickness of the furnace wall. Even if each lance tube (2-1, 2-2, 2-3) moves to a position inside the sleeve-like member (5), all the guide members (3) are not in contact with each other. The lance tube (2-1, 2-2, 2-3) can be stably slid by being always supported by the furnace wall via the sleeve-like member (5).

  According to the invention described in claim 4, in addition to the effect of the invention described in claim 3, the reaction force when the high-pressure fluid is injected from the nozzle (1) into the furnace is the first lance tube (2-1). And acts on the connecting portion (4-1) of the intermediate lance tube (2-2) adjacent to the first lance tube (2-1), but is arranged inside the furnace in the plurality of guide members (3). Since the guide member (3-1) to be operated is disposed closer to the nozzle (1) than the connection portion (4-1), the connection portion (4) is generated by the reaction force of high-pressure fluid injection from the nozzle (1). The moment acting on -1) can be reduced.

  According to the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4, it accompanies the reaction force when the high-pressure fluid is ejected from the nozzle 1 and the rotational operation around the lance tube axis. It is possible to increase the resistance to deformation (crushing) or breakage or loosening of the screw portion of the connecting portion (4).

  According to the invention described in claim 6, when the apparatus having the straight tubular lance tube (2) is installed as an apparatus for removing clinker adhering and depositing on a throat portion of burners and ports installed in a boiler furnace. It is easy to carry by hand, easy to assemble and operate, and enables efficient clinker removal work.

It is a sectional side view of the clinker removal apparatus which becomes the 1st Embodiment of this invention. It is a principal part enlarged view of FIG. It is the figure which represented typically a mode that the lance tube which becomes embodiment of this invention was inserted and connected to a furnace wall. It is sectional drawing (FIG. 4 (a)) which shows an example of the connection part which consists of a screw joint which becomes embodiment of this invention, and the top view (FIG.4 (b)) of a star washer. It is sectional drawing (FIG. 5 (a)) which shows an example of the connection part which consists of a screw joint which becomes embodiment of this invention, and the top view (FIG.5 (b)) of a star washer. It is sectional drawing (FIG. 6 (a), FIG.6 (b)) of the connection part by the spring which becomes embodiment of this invention. It is a sectional side view of the clinker removal apparatus which becomes another embodiment of this invention. It is a sectional side view of the clinker removal apparatus of the comparative example of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The burner fuel to which the clinker removing apparatus of the present invention is applied is assumed to use pulverized coal as a solid fuel and air as a combustion gas. However, the present invention is a fuel type in the burner. It is not limited by the type of combustion gas. Further, each component of the present invention can be appropriately replaced with one having the same function / action. For example, the material of the member is only an example unless otherwise specified.

  In the present embodiment, first, one straight tubular lance tube 2 is connected from the insertion port (view window) 6 of the sleeve-like member 5 on the boiler side into which the straight lance tube 2 is inserted to the fluid introduction part 7 outside the furnace. Divide it into multiple pieces that are short enough to fit in between. At this time, the first lance tube 2-1 and the second lance tube 2-3 may be one each, and the intermediate lance tube 2-2 is connected to the lance tubes 2-1, 2-2, 2 connected to each other. -3 or more depending on the required number of divisions depending on the required length from the insertion port (view window) 6 of the sleeve-like member 5 on the boiler side to the fluid introduction part 7 outside the furnace Set the required number.

  Secondly, the guide member 3 is installed on the outer peripheral surface of the straight tubular lance tube 2 so as to be positioned at least in a range where the sleeve-like member 5 mounted on the boiler side in use is provided. . The sleeve-like member 5 is originally provided on the boiler side as an oil gun insertion sleeve in the case of a burner and as a viewing window sleeve in the case of other ports.

  This guide member 3 (guides 3-1, 3-2) is a straight tubular lance so that the lance tubes 2-1, 2-2, 2-3 slide inside the sleeve-like member 5 on the boiler side. It is provided on the outer peripheral surface of the tube 2.

  The guide member 3 serves as a contact member that smoothly supports the function of supporting the load of the straight tubular lance tube 2 on the inner peripheral surface of the sleeve-like member 5 and the operation of rotating the lance tube 2 around the central axis. Also has the role of

  Here, the connection part 4 (4-1, 4-2) of each lance tube 2-1, 2-2, 2-3 is a reaction force when a high pressure fluid is ejected from the nozzle 1 and around the lance tube axis. It is desirable to adopt a structure having a high resistance to deformation (crushing) or breakage or loosening of the threaded portion of the connecting portion 4 accompanying the rotation operation.

  FIG. 1 shows a side sectional view of a clinker removing apparatus according to a first embodiment of the present invention, and FIG. 2 shows an enlarged side sectional view of a main part thereof. 1 and 2 show that the lance tube 2 is inserted from the observation viewing window (insertion port) 6 formed at the outer end of the sleeve-like member 5 provided in the central axis of the air flow path of AAP (After Air Port). And the mode that the nozzle part 1 which injects a high pressure fluid was extended to the throat part 10 of the furnace used as clinker removal object is represented.

  Here, the right side of the drawing corresponds to the inside of the furnace of the boiler equipment, and the left side corresponds to the outside of the furnace, and the lance tube 2 is inserted into the air flow path in the AAP in which the air for two-stage combustion is supplied from a wind box (not shown). From the nozzle part 1 at the tip of the lance tube 2 reaching the furnace opening through the part 10, the air flows into the furnace as a jet air flow 9.

  A fluid introduction portion 7 (this portion is shown in a side view, not a cross-sectional view) is fixed outside the furnace of the air flow path in the AAP, and is cylindrical near the longitudinal center axis of the air flow path in the AAP. The sleeve-shaped member 5 is installed. The sleeve-like member 5 is provided with an opening 5a on the inner side of the furnace, and the end opening on the outer side of the furnace is usually a viewing window 6. The viewing window 6 is for observing the air flow path in the AAP and the state in the furnace from the outside of the furnace. This viewing window 6 is opened as an insertion port for the straight tubular lance tube 2 when the clinker removing device of the present invention is used.

  The clinker removing device of this embodiment forms a flow path through which the high-pressure fluid supplied from a high-pressure fluid supply device (not shown) flows inside the lance tube 2. That is, by repeatedly connecting the tube ends such as the short first lance tube 2-1 inserted into the sleeve-like member 5 and the end of the intermediate lance tube 2-2 to be inserted next, a viewing window (tube 2) is obtained. A straight tubular lance tube 2 having a length commensurate with the distance from the throat portion 10 to the clinker attachment position of the throat portion 10 is formed.

In the present embodiment, the following three types of lance tubes 2-1, 2-2, 2-3 are connected in order from the inside of the furnace.
1) With a nozzle 1 provided with a connecting portion 4-1a between a nozzle 1 for injecting a high-pressure jet fluid on a side surface in the vicinity of the tip portion in the axial direction and an intermediate lance tube 2-2 adjacent to the opposite end portion. First lance tube 2-1
2) Intermediate lance tube 2-2 provided with connecting portions 4-1b and 4-2a connected to first and second lance tubes 2-1 and 2-3 adjacent to both ends in the axial direction.
3) An operation portion provided with a connecting portion 4-2b connected to an intermediate lance tube 2-2 adjacent to one end portion, and a fluid introducing portion 7 for introducing a high-pressure jet fluid from the outside to the opposite end portion. Second lance tube 2-3
As the nozzle 1 installed in the first lance tube 2-1, various nozzles capable of ejecting a high-pressure fluid can be applied. For example, compressed air of about 1 to 2 MPa is suitable as the high-pressure fluid. In the case of gas, compared to liquids such as water, there is no need for post-treatment of the fluid after use, and there is an advantage that excessive thermal shock is not given to the material of the boiler equipment that has received the jet. However, the removal capacity of clinker is generally disadvantageous in the case of gas compared to liquid (high pressure water or the like).

  Since the diameter of each lance tube 2-1, 2-2, 2-3 has an upper limit in conjunction with the inner diameter of the sleeve-like member 5, in the example shown in FIG. The number of nozzles 1 is one. In this case, it is particularly important to consider the force acting on the connecting portion 4-1a of the first lance tube 2-1 with the intermediate lance tube 2-2 adjacent to the nozzle 1 due to the reaction force of the jet fluid such as air. Become.

  In the case where the jetting fluid and the flow rate sufficient for removing the clinker can be ensured from the jetting fluid from each nozzle 1, the above-mentioned nozzles (not shown) located at the position of the lance tube 2-1 facing the nozzle 1 are used. You may provide in the position which can counteract the reaction force of the nozzle 1 mutually.

  The second lance tube 2-3 for operation includes a fluid introduction portion 7 for introducing a high-pressure jet fluid supplied from a high-pressure fluid supply device (not shown), and an operator manually enters the second lance tube 2-3. A handle 11 for moving the shaft back and forth in the axial direction and rotating it in the circumferential direction is provided.

  The fluid introduction unit 7 seals the injection fluid with a base 7-1 that introduces the injection fluid into the second lance tube 2-3 from one direction where the second lance tube 2-3 is fixed. On the other hand, a connection mechanism 7-2 connected to the base 7-1 so that the lance tube is rotatable around the axis is provided.

  These lance tubes 2-1, 2-2, and 2-3 have axial lengths of L5 (lance tube with nozzle 2-1), L4 (intermediate lance tube 2-2), and L3 (for operation), respectively. Lance tube 2-3), and L1 is a distance from the fluid introduction part 7 outside the furnace to the insertion port (viewing window) 6 of the sleeve member 5 into which the lance tubes 2-1, 2-2, and 2-3 are inserted. At this time, the following relationship is established between the distances.

L1> L3, L1> L4, L1> L5
Thereby, as shown in FIG. 3 which is a schematic sectional view of assembly, first, the lance tube 2-1 with the nozzle 1 is inserted into the sleeve-like member 5 through the insertion port 6, and the intermediate lance is inserted into the connecting portion 4-1a. The connection part 4-1b of the tube 2-2 can be connected.

  Next, the intermediate lance tube 2-2 is inserted into the sleeve-like member 5, and the connecting portion 4-2b of the second lance tube 2-3 for operation is connected to the connecting portion 4-2a on the opposite side. One straight tubular lance tube 2 can be integrated.

  Here, if only the throat portion of the burner is to be subjected to clinker removal, the entire lance tube 2 is not divided in the length direction, but a single long lance as in the invention described in Patent Document 1. You may make it comprise only the tube 2. FIG.

  That is, in a normal burner use state, an oil burner gun inserted through a sleeve-like member 5 into a nozzle central axis of a burner (not shown) passes through a bent portion of the fuel pipe and is inserted into the burner nozzle from the nozzle furnace. It is a long one that reaches the vicinity of the inner opening, and its length reaches, for example, about 5 m.

  For this reason, consideration is given to the design and arrangement of the boiler so that there are no obstacles when inserting or removing the oil burner gun behind and outside the boiler furnace. There is no need to “divide” the tube 2 short.

  However, the straight tubular lance tube 2 is mainly composed of a metal pipe material in consideration of the strength, heat resistance and cost. As an example, the outer diameter is about 50 mm and the wall thickness is about 3 to 7 mm. Therefore, there are many cases where it is difficult to carry out operations such as carrying in and installing the boiler facility from the outside by a small number of people. If the straight tubular lance tube 2 is divided, transportation, assembly, and insertion into the sleeve-like member 5 can be easily performed manually.

  On the other hand, in the case of ports other than the burners, a sufficient space for inserting the long straight tubular lance tube 2 into the thin sleeve-like member 5 is not secured outside the boiler furnace behind the ports. In many cases, there are some interferences (for example, the fluid introduction part 7 shown in FIG. 1).

  As described above, FIG. 3 schematically shows a state in which the lance tube 2 of the present invention is inserted and connected to the portion in such a state. If the straight tubular lance tube 2 is constituted by one long tube in accordance with the distance from the insertion port (viewing window) 6 of the sleeve-like member 5 to the location where the clinker 8 is adhered, from the insertion port 6 to the clinker adhesion location. When the fluid introduction part 7 is present at the rear part of the observation window 6 at a short interval compared to the distance of, the straight tubular lance tube 2 or the like cannot interfere and be inserted.

From this point of view, it is important that the lance tube 2 is divided into a plurality of parts.
Here, it is needless to say that the inner diameter DS of the sleeve-like member 5> the outer diameter DL of the lance tube 2. However, the inner wall surface of the sleeve-like member 5 and the outer peripheral surface of the lance tube 2 are bent. Distortion may have occurred. Furthermore, immediately after the operation of the boiler facility is stopped, the inside of the furnace of the sleeve-like member 5 is thermally expanded at a high temperature, while the lance tube 2 is in a cold state. Further, since the sleeve-like member 5 side contracts as the cooling progresses, it is necessary to secure a certain gap between the lance tube 2 and the sleeve-like member 5. .

  At this time, when the outer peripheral surface of the lance tube 2 is in direct contact with the inner wall surface of the sleeve-like member 5, the sleeve-like member is fitted so that the long lance tube 2 is fitted into an elongated groove. There is a possibility that a line contact is made with the inner wall of 5 in a long range in the axial direction. For this reason, there is a possibility that dragging and sticking may occur or an operation may be hindered when performing a rotation operation during axial insertion / removal / moving and removal operations.

  In the present embodiment, two thin ring-shaped guide members 3 (for example, guide 3-1 and guide 3-2) are provided on the outer peripheral surface of the lance tube 2, and the outer peripheral surface of the lance tube 2 is directly a sleeve-like member 5. The structure which does not contact with the inner wall surface of this, but contacts via the guide 3-1 and the guide 3-2 which are ring-shaped members is taken.

The guide member 3 is not limited to a thin ring shape as long as it is functionally similar.
The guide 3-1 inside the furnace and the guide 3-2 outside the furnace are provided so that both are located within the range of the sleeve-like member 5 during the clinker removing operation by the clinker removing device.

  That is, since the throat portion 10 of the furnace from which the clinker 8 is to be removed has a certain width in the front-rear direction (inside and outside the furnace), the nozzle 1 provided at the tip of the lance tube 2 when the clinker 8 is removed. It is desirable that both the guide 3-1 and the guide 3-2 are located within the range of the sleeve-like member 5 when the guide is moved to the innermost side of the furnace and the outermost side of the guide.

  In particular, the arrangement of the guide 3-1 inside the furnace is such that the reaction force when the high-pressure fluid is injected from the nozzle 1 to the connecting portion 4-1 between the lance tube 2-1 and the lance tube 2-2 acts greatly. Is important. In this embodiment, it is on the lance tube 2-1 with the nozzle 1 and is disposed closer to the nozzle 1 than the connecting portion 4-1 closest to the distal end side of the lance tube 2-1.

  Thereby, the moment which acts on the connection part 4-1 by the reaction force of the high pressure fluid injection from the nozzle 1 can be reduced. From the viewpoint of reducing this moment, the guide 3-1 is disposed on the lance tube 2-1 on the nozzle 1 side of the connecting portion 4-1, and as close as possible to the connecting portion 4-1. Is desirable.

The guide 3-2 outside the furnace also serves as a mark for stopping the movement in the operation of moving the straight tubular lance tube 2 to the outside of the furnace when performing the removing operation.
The connection part 4-1 of the lance tubes 2-1 and 2-2 and the connection part 4-2 of the lance tubes 2-2 and 2-3 are the reaction force when the high-pressure fluid is ejected from the nozzle 1 and around the lance tube axis. A structure having a high resistance to deformation (crushing), breakage, or loosening of the threaded portion of the connecting portion associated with the rotation operation of is suitable.

  FIG. 4 shows a schematic diagram of an example of the connecting portion 4-1 made of a screw joint. The cross-sectional view shown in FIG. 4 (a) and the plan view of the star washer 14 shown in FIG. 4 (b) are connections in which female screws and male screws are provided at the ends of the two lance tubes 2-1, 2-2, respectively. This is an example of the part 4-1, and a star washer 14 is interposed between the contact surfaces of the two lance tubes 2-1 and 2-2. The positional relationship between the female screw and the male screw of the connecting portion may be reversed left and right.

  FIG. 5 shows a schematic view of the connecting portion 4-1 of the embodiment comprising another screw joint, FIG. 5 (a) shows a side view, and FIG. 5 (b) shows a plan view of the star washer 14. As shown in FIG. 5B, twelve teeth 15 are evenly formed on the outer periphery of the star washer 14. And when using it for the connection part 4-1 of the lance tubes 2-1, 2-2, only the necessary teeth 15 are left out of the 12 teeth 15, and the other teeth 15 are excised. In the example shown in FIG. 5, four teeth 15 are left. Further, a part of the outer periphery on the contact surface side of each of the lance tubes 2-1 and 2-2 is formed in, for example, an octagonal column shape, and a groove 13 is provided in each plane of the octagonal column 12, and the outer periphery of the star washer 14 is provided in the groove 13 The four teeth 15 that are left on are bent and fitted. In this way, the connection part shown in FIG. 5 can suppress the looseness of the connection part accompanying the rotation operation of the lance tubes 2-1 and 2-2. The positional relationship between a female screw and a male screw (not shown) of the connecting portion 4-1 of the lance tubes 2-1 and 2-2 may be reversed left and right.

  Instead of the connecting portions 4-1 and 4-2 shown in FIGS. 4 and 5, as shown in the connecting portion cross-sectional view of FIG. 6A, the convex joint 2 is formed at the end of one lance tube 2-2. -2-a is provided, and the protrusion 16 having the spring 18 is provided in the convex joint 2-2a, and the concave joint 2 is provided with the projection 16 that is compressed and contracted at the end of the other lance tube 2. It is good also as a structure connected so that it may fit in the hole 17 of -1-a.

As a result, it is not necessary to process the screw on the lance tube 2 and the attachment / detachment is facilitated, so that the labor of the operator at the site where the furnace is installed can be reduced.
As shown in the cross-sectional view of the connecting portion 4-1 in FIG. 6A, it is desirable that the hole 17 penetrates the outer peripheral surface of the lance tube 2-1-a. As a result, when the lance tubes 2-1 and 2-2 are attached to and detached from each other, the protrusions 16 are pushed down from the outside against the force of the spring 18 and can be easily attached and detached by pulling out the lance tubes 2-2.

  Further, as shown in the cross-sectional view of the connecting portion 4-1 in FIG. 6B, the hole 17 of the lance tube 2-1 has a recess portion 17 a that accommodates the protrusion 16 of the lance tube 2-2. If the opening having a smaller diameter than the tip of the projection 16 penetrates the outer peripheral surface of the lance tube 2-1 on the back side of the recess 17 a, the tip of the projection 16 is the lance tube 2. Interference with other members can be avoided without jumping out to the outer peripheral surface of -1.

  In this way, a plurality of lance tubes 2-1 and 2-2 are connected, and an operation in which the operator rotates around the axis (circumferential direction) and an operation in which the operator moves in the front-rear direction (inside and outside the furnace) are performed. Thus, the clinker can be efficiently removed by spraying the high-pressure fluid uniformly over the entire surface of the throat portion 10 of the furnace.

  The operator proceeds with the clinker removal work by appropriately performing simple operations such as a one-way reciprocation and a rotation using the handle 11 (FIG. 1) on the second lance tube 2-3 for operation. Can do.

  Since the handle operation is an operation from outside the furnace, it can be started even in a high temperature state before the inside of the furnace reaches room temperature after the boiler operation is stopped. In particular, if the removal target part in the boiler is in a high temperature state, the clinker that has adhered and deposited easily peels and falls off due to the rapid cooling effect associated with high-pressure fluid injection, and the removal work proceeds promptly and efficiently. be able to.

  In this embodiment, one straight tubular lance tube 2 is shortened to such a length that it can be accommodated between the insertion port 6 of the sleeve-like member 5 on the boiler side into which the lance tube 2 is inserted and the fluid introduction part 7 outside the furnace. Although it divides | segments into plurality, the lance tube 2-1 with the nozzle 1 and the lance tube 2-3 for operation should just be one each. On the other hand, the intermediate lance tube 2-2 is divided depending on the required length of the entire connected lance tube 2 and the length from the insertion port 6 of the sleeve-like member 5 to the fluid introduction part 7 at the rear (outside of the furnace). Depending on the conditions, one or more required numbers are set.

In addition, the guide member 3 provided on the outer peripheral surface of the lance tube 2 needs to be installed so as to be positioned within the range in which the sleeve-like member 5 is provided during use. Since the positions of the insertion port 6 and the opening 5a, which is the end portion on the furnace side, are determined regardless of the required length of the lance tube 2, conditions for dividing (setting) the straight tubular lance tube 2 (for example, the number of divisions) In addition, the length of the sleeve-like member 5 (the length, the insertion port 6, the opening) Consideration according to the position of the part 5a and the like is necessary.
[Comparative Example 1]

FIG. 8 shows a case in which the length of the sleeve-like member 5 is short and the distance Lx from the tip of the opening 5a to the furnace throat portion 10 which is the farthest part to be clinker removed is long.
In this case, the distance Lx from the tip of the sleeve opening 5a to the tip of the lance tube 2 where the straight tubular lance tube 2 is inserted as far as the furnace inside is longer than the length L5 of the lance tube 2-1 with nozzle 1. Also long.

  As in the first embodiment, if the guide 3-1 is disposed near the connecting portion 4-1 of the lance tube 2-1 with the nozzle 1, the lance tube 2-1 is moved to the inside of the furnace. The guide 3-1 protrudes from the tip of the sleeve opening 5-1. Therefore, the guide 3-1 is disposed on the intermediate lance tube 2-2 at a position close to the connecting portion 4-1b.

  However, in this case, when only one nozzle 1 is provided and the reaction force of the high-pressure fluid injection cannot be canceled out by the reaction force of the plurality of nozzles 1, the guide 3-1 is supported as a fulcrum. As a result, the moment of reaction force of the nozzle 1 acting on the connecting portion 4-1 becomes large, which may cause deformation (caking), breakage or loosening of the screw portion of the connecting portion 4-1.

  In the case of the configuration of Comparative Example 1 shown in FIG. 8, as shown in FIG. 7, the lance tube 2-1 with the nozzle 1 is used as the straight tubular lance tube 2 extending from the tip of the opening 5 a of the sleeve member 5 to the furnace inside. -1 and an extension lance tube 2-1-2 connected to the connection portion 4-1-1.

And the guide 3-1 is provided on the lance tube 2-1-2 for extension, and arrange | positioned in the site | part close | similar to the connection part 4-1-2 with the intermediate | middle lance tube 2-2.
In other words, the lance tube 2-1 with the nozzle 1 is further divided into the lance tube 2-1-1 with the nozzle and the lance tube 2-1-2 for extension by the connecting portion 4-1-1 and connected from the nozzle 1 as much as possible. The length L9 of the lance tube 2-1-1 with a nozzle is set so that the distance to the part 4-1-1 is shortened.

  Thereby, the action of the reaction force of the high-pressure fluid injection from the nozzle 1 acting on the connection part 4-1-1 is reduced, and the screw parts in the connection part 4-1-1 and the connection part 4-1-2 are reduced. The possibility of deformation (raising) or breakage or loosening can be reduced.

  The configuration, assembly method, function, effects and the like of the third embodiment are the same as those of the first embodiment.

DESCRIPTION OF SYMBOLS 1 Nozzle part 2 Lance tube 3 Guide member 4 Connection part 5 Sleeve-like member 6 Observation window for observation (insertion opening)
7 Fluid introduction part 8 Clinker 9 Blowing air flow 10 Throat part 11 Handle 12 Bolt 13 Groove 14 Star washer 15 Star washer 16 Protrusion 17 Hole 18 Spring

Claims (6)

1) A first lance tube (2-1) provided with a nozzle (1) for injecting a high-pressure injection fluid (9) on a side surface in the vicinity of an axial tip.
2) a second lance tube (2-3) provided with a fluid introduction part (7) for introducing a high-pressure jet fluid from the outside to the end part;
3) Between the first lance tube (2-1) and the second lance tube (2-3), the first and second lance tubes (2-1, 2-3) are arranged at both ends in the axial direction. At least one intermediate lance tube (2-2) provided with a connecting part (4-1, 4-2) to be connected at each part
A straight tubular lance tube (2) connected with
A plurality of guide members (3) that allow the lance tube (2) to slide inside the sleeve-like member (5) installed through the boiler furnace wall are provided on the outer periphery of the lance tube (2). A clinker removing device provided.   A working space in which each lance tube (2-1, 2-2, 2-3) can be inserted from the outside of the furnace wall into the sleeve-like member (5) is provided outside the furnace wall. The clinker removing apparatus according to claim 1.   The clinker removing apparatus according to claim 1 or 2, wherein the plurality of guide members (3) are arranged at positions where they are in contact with the inner peripheral surface of the sleeve-like member (5) corresponding to the thickness of the furnace wall.   The first guide member (3-1) disposed inside the furnace among the plurality of guide members (3) is an outer peripheral portion of the first lance tube (2-1) with the nozzle (1), The nozzle (1) side is arrange | positioned rather than the connection part (4-1) with the intermediate | middle lance tube (2-2) adjacent to a 1st lance tube (2-1). Clinker removal equipment.   The connecting portion (4-1) between the adjacent first lance tube (2-1) and the intermediate lance tube (2-2) and the intermediate lance tube (2-2) and the second lance tube (2-3) The connecting portions (4-2) are connected by screwing, and contact surfaces of the first lance tube (2-1) and the intermediate lance tube (2-2) and the intermediate lance tube (2-2) and the second lance tube (2-2). The clinker removing device according to any one of claims 1 to 4, wherein a star washer (14) is interposed in each contact surface of the lance tube (2-3). To the extent that it fits between the insertion port (6) of the sleeve-like member (5) provided in advance in the penetration part of the boiler furnace wall into which the straight tubular lance tube (2) is inserted and the fluid introduction part (7) outside the furnace The straight tubular lance tube (2) is divided into at least two so as to have a length of
The first lance tube (2-1) to be inserted into the front end portion inside the furnace is provided with a nozzle (1) for high-pressure fluid injection, and each divided body of the straight tubular lance tube (2) divided into at least two parts is sequentially screwed. The second lance tube (2-3) outside the furnace is connected by a joint connection, and a fluid introduction part (7) for introducing a high-pressure jet fluid from the outside is provided,
Further, one or more guide members (3) are wound around the outer peripheral portion of the straight tubular lance tube (2), and the straight tubular lance tube (2) and the guide member (3) are inserted into the sleeve-like member (5). A method of installing a clinker removing device on a boiler furnace wall, characterized in that.

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