JP3433507B2 - Clinker removal device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clinker removing apparatus capable of removing clinker adhering near a throat portion of a furnace even during combustion of a pulverized coal burner. . 2. Description of the Related Art Pulverized coal combustion, in which fine powder of coal pulverized by a pulverizer is mixed with primary air and ejected from a pulverized coal burner to perform floating combustion, is a coal combustion method widely used in the past. FIG. 4 shows an example of a pulverized coal burner used in the combustion type furnace. In the figure, 1 is a furnace, 2
Is a throat formed at a predetermined position on the side wall of the furnace 1, and 3 is a wind box arranged outside the furnace 1 near the throat 2 to supply secondary air 4 for combustion to the furnace 1. The pulverized coal burner 5 is disposed at the center of the throat 2 through the wind box 3. [0003] The pulverized coal burner 5 is a pulverized coal burner 5.
A tertiary air nozzle which is disposed at the center of the nozzle, has a substantially cylindrical shape, and a diameter gradually decreases from a middle portion in the longitudinal direction toward the distal end, and a throttle portion at the distal end opening where the diameter sharply decreases toward the distal end. 6, which is disposed concentrically on the outer periphery of the tertiary air nozzle 6, has a shape substantially similar to that of the tertiary air nozzle 6, and has, at the tip opening, a narrowing portion whose diameter sharply decreases toward the tip. A pulverized coal nozzle, which is provided at a rear end portion of the pulverized coal nozzle 7 and guides pulverized coal 8 formed in a tangential direction and supplied together with primary air from a mill (not shown) into the pulverized coal nozzle 7. 9 and an oil burner 1 inserted at the axial position of the tertiary air nozzle 6.
0 is provided. The oil burner 10 is supported by a support 11 provided at the rear end of the tertiary air nozzle 6 so as to be movable in the axial direction, and protrudes outside the tertiary air nozzle 6 through the support 11. Air cylinder 1 at base end
2 and an oil burner main body 14 inserted into the outer pipe 13. The oil burner main body 14 is expanded and contracted by the air cylinder 12.
3 so as to be able to move together with it and perform predetermined positioning. In order to adjust the amount of the secondary air 4, an air register 15 is provided in a space formed between the throat 2 and the wind box 3 so as to surround the throat 2 in a circle. In order to apply a turning force to the secondary air 4, a plurality of inner vanes 16 are disposed in a circumferential direction inside the air register 15, and a wind box is provided to guide the tertiary air 17 to the tertiary air nozzle 6. 3 and the rear end of the tertiary air nozzle 6 communicate with each other through a tertiary air pipe 18,
A tertiary air damper 19 is provided at a required position of the tertiary air pipe 18. [0006] Pulverized coal 8 pulverized by a mill not shown
And pulverized coal supply port 9 of pulverized coal nozzle 7
When the pulverized coal is supplied to the pulverized coal nozzle 8, the mixed flow of the pulverized coal 8 and the primary air is supplied to the pulverized coal supply port 9 formed in the tangential direction of the pulverized coal nozzle 7.
The pulverized coal nozzle 7 is provided with a orbiting motion at the rear end thereof, flows in the tip direction while rotating in the circumferential direction along the inner surface of the pulverized coal nozzle 7, and is ejected from the tip of the pulverized coal nozzle 7, from the wind box 3 It mixes with the supplied secondary air 4 and burns. [0007] At this time, the clinker 20 generated by ash and the like contained in the coal adheres and accumulates around the throat and hinders the flow of air and the combustion of the pulverized coal 8, so that the clinker 20 is removed in a timely manner. There must be. Clinker 2
Conventionally, in order to remove 0, after suspending the operation of the equipment, a manhole (not shown) provided on the wall surface of the furnace 1 is opened after the furnace 1 is cooled, and the clinker 20 is deposited from the manhole. Check and use a mechanical tool such as a long pipe to perform a manual crushing operation.
0 is removed. [0008] However, the above-described clinker 20 removal operation cannot be performed during the operation of the equipment, and the operation of the equipment must be stopped to wait for the furnace 1 to cool. There is a problem that time loss is large and removal of the clinker 20 by human power involves danger. The present invention has been made in view of the above circumstances, and has as its object to provide a clinker removing apparatus which can visually recognize a throat portion of a furnace through an axis of a pulverized coal burner and can inject high-pressure water around the throat. It was done as. According to the present invention, there is provided a clinker removing apparatus, comprising: a cooling air passage having a cylindrical shape, to which a cooling air pipe can be connected at a base portion; and a concentrically arranged outer periphery of the cooling air passage. A high-pressure water passage that has a single-hole nozzle directed radially outward at the distal end and that can connect a high-pressure water pipe to the base; and the cooling air passage and the high-pressure water passage at the distal end side of the cooling air passage. A viewing hole that is opened through the peripheral wall, a reflecting mirror that is tiltably provided in the cooling air passage near the viewing hole and that can reflect the outside through the viewing hole, and that the entire surface of the reflecting mirror can be visually recognized. And a fiber scope inserted from the base side of the cooling air passage, and is formed so as to be rotatably inserted into the axial position of the pulverized coal burner instead of the oil burner. According to the present invention, when the clinker removing device inserted into the axis of the pulverized coal burner is rotated, the situation around the throat of the pulverized coal burner is reflected on the reflecting mirror, and the fiber scope is used. The high-pressure water supplied to the high-pressure water passage from the high-pressure water pipe can be visually confirmed, and is ejected from the single-hole nozzle toward the vicinity of the pulverized coal burner throat. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view schematically showing an embodiment of the clinker removing apparatus of the present invention, FIG. 2 is a detailed view of the mounting of a reflecting mirror related to FIG. 1, and FIG. It is sectional drawing at the time of attaching to a burner. The clinker removing apparatus according to the present invention uses the outer pipe 13 instead of the oil burner body 14 inserted into the outer pipe 13 of the oil burner 10 mounted on the axis of the conventional pulverized coal burner 5 shown in FIG.
So that it can be inserted into The clinker removing device 33 has a small hole 21 in the center of the base end face, and a connection port 2 for a cooling air pipe formed on a peripheral wall near the base end.
2, a cooling air passage 23 having a substantially cylindrical shape, the cooling air passage 23 being concentrically disposed on the outer periphery of the cooling air passage 23, the base end face and the tip end face being closed, and a high-pressure water pipe connected to the peripheral face near the base end. Mouth 2
And a high-pressure water passage 26 having a single-hole nozzle 25 pointing radially outward on the peripheral surface near the front end portion. The cooling air passage 23 is located at a predetermined position on the front end side of the cooling air passage 23.
And a visual hole 27 that opens through each peripheral wall of the high-pressure water passage 26, and the cooling air passage 23 near the visual hole 27
And a reflecting mirror 28 that is provided to be tiltable inside and can reflect the outside of the high-pressure water passage 26 through the viewing hole 27. The reflecting mirror 28 is preferably a reflecting mirror 28 having a convex surface capable of reflecting a wide range as compared with the size of the mirror body. The reflecting mirror 28 is constructed as shown in FIG. 2 and is inserted and fixed inside the cooling air passage 23. That is,
Blocks 31 having adjusting screw members 29 and 30 extending in a direction parallel to the axis are provided at two locations which are formed so as to be inserted and fixed in the cooling air passage 23 and are spaced apart by a predetermined distance in the radial direction. One of the screw members 29, 30 rotatably supports one side of the back surface of the reflecting mirror 28, and the other side of the same back surface is the other screw member 30.
The tilting angle of the reflecting mirror 28 can be adjusted to approximately 45 degrees with respect to the axis of the block by moving the screw member 30 forward and backward, and the reflecting mirror 28 is attached as described above. Block 31 to the cooling air passage 23
The reflecting mirror 28 is inserted first into the tip of
Secure to the side. Further, a fiberscope 32 is inserted from the small hole 21 on the base side of the cooling air passage 23, and is fixed so that the entire surface of the reflecting mirror 28 can be visually recognized by the fiberscope 32. The clinker removing device 33 composed of the above-described components is attached to the oil burner main body 14 inserted in the outer tube 13 of the oil burner 10 mounted on the axis of the pulverized coal burner 5. Instead, it is formed so that it can be inserted into the outer tube 13. Next, the operation will be described. Clinker 20
When it is necessary to remove the oil burner main body 14 from the outer pipe 13 of the oil burner 10 of the pulverized coal burner 5, the clinker removing device 33 is replaced with the clinker removing device 33 as shown in FIG. Inserted into the outer tube 13,
Connection port 2 of cooling air passage 23 of clinker removing device 33
2, a high-pressure water pipe 35 is connected to the connection port 24 of the high-pressure water passage 26, and a T / V monitor 36 is connected to a terminal of the fiberscope 32. Thereafter, when the clinker removing device 33 inserted into the axis of the pulverized coal burner 5 is rotated, the situation around the throat 2 of the furnace 1 is reflected on the reflecting mirror 28, and T / It can be visually recognized by the V monitor 36 (for example, a range indicated by a symbol L in FIG. 3 can be visually recognized). While the clinker 20 around the throat 2 is visually recognized by the T / V monitor 36 as described above, the clinker 20 is supplied from the high-pressure water source (not shown) into the high-pressure water passage 26 through the high-pressure water pipe 35. When the high-pressure water 37 is ejected from the single-hole nozzle 25 provided at the tip of the high-pressure water passage 26 toward the clinker 20, thermal shock due to a rapid change in the velocity energy of the high-pressure water 37 and the heat in the clinker 20 is caused. As a result, the clinker 20 collapses and is removed. During this time,
The fiber scope 32 and the reflecting mirror 28 are cooled by air supplied from a cooling air source (not shown) to the cooling air passage 23 via the cooling air pipe 34, and are protected from the high-temperature atmosphere in the furnace 1. According to the above-described clinker removing device, the clinker can be inserted into the axis of the pulverized coal burner 5, and the periphery of the throat 2 can be visually recognized through the reflecting mirror 28 and the fiberscope 32. 28 and fiberscope 32
It is possible to supply the cooling air for cooling the clinker 20. Also, since the high-pressure water 37 can be ejected to the clinker 20 attached to the vicinity of the throat 2, the attachment of the clinker 20 can be performed as needed even during operation of the equipment. The state can be visually recognized, and the clinker 20 can be removed in a timely manner. It should be noted that the present invention is not limited to the above-described embodiment, and the cooling air passage 23 is not limited to a substantially cylindrical shape, but may be any shape as long as it is cylindrical. Of course, various changes can be made without departing from the gist. According to the clinker removing apparatus of the present invention, various excellent effects as described below can be obtained. I) The clinker adhesion state around the throat can be visually recognized at any time even during the operation of the equipment, so that the clinker can be removed in a timely manner without stopping the operation of the equipment. II) Since high-pressure water and cooling air pass through the clinker removing device, they are resistant to heat and can withstand the high-temperature atmosphere in the furnace.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view schematically showing an embodiment of a clinker removing apparatus according to the present invention. FIG. 2 is a detailed mounting view of the reflector associated with FIG. 1; FIG. 3 is a cross-sectional view when the clinker removing device of FIG. 1 is mounted on a pulverized coal burner. FIG. 4 is a sectional view schematically showing an example of a conventional pulverized coal burner. [Description of Signs] 5 Pulverized coal burner 10 Oil burner 23 Cooling air passage 25 Single hole nozzle 26 High pressure water passage 27 Viewing hole 28 Reflector mirror 32 Fiber scope 33 Clinker removing device 34 Cooling air tube 35 High pressure water tube

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Claims (1)

(1) A cooling air passage which is cylindrical and can be connected to a cooling air pipe at a base thereof, and is provided concentrically on the outer periphery of the cooling air passage and has a diameter at a tip end thereof. A high-pressure water passage having a single-hole nozzle pointing toward the outside and capable of connecting a high-pressure water pipe to a base, and an opening penetrating through the peripheral wall of the cooling air passage and the high-pressure water passage at a tip end side of the cooling air passage. A viewing hole, a reflecting mirror that is provided to be tiltable in the cooling air passage near the viewing hole, and that can reflect the outside through the viewing hole, and a base of the cooling air passage so that the entire surface of the reflecting mirror can be viewed. A clinker removing device having a configuration including a fiber scope inserted from the side, and formed so as to be rotatably inserted in place of an oil burner at an axial center position of the pulverized coal burner.