JPS6012898B2 - Air extraction planetary cooler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an extraction planetary cooler having a plurality of cooling cylinders arranged in a planetary manner in a rotary kiln.

In some prior art, a part of a planetary cooling cylinder connected to a rotary kiln is covered with an air bleed hood, and the cooling cylinder and the air hood are communicated, thereby bleeding air from the cooling cylinder. (such as Jibatsu-kai 50-112420).

The parts such as the cooling cylinder covered by this Yuzuki hood are
When the temperature reaches high temperatures, it is easy to cause malfunctions due to heat, and since it is covered with a yuzu hood, repair work is difficult. In other prior art techniques, a part of the air heated through the cooling cylinder is extracted from the rotary kiln in front of the rotary kiln equipped with a kill burner (Japanese Patent Laid-Open No. 49-128015, etc.). Therefore, in order to support the cooling cylinder, an air bleed duct is installed inside the support cylinder, which is coaxial with the rotary kiln and integrally provided on the extension of the front of the kiln. When introducing air gas, the air duct becomes long, and it is difficult to provide enough space to inspect the kiln burner inside the support cylinder. Therefore, the object of the present invention is to
It is an object of the present invention to provide an air-sleeve type planetary cooler that can reduce breakdowns due to heat in a cooling tube, facilitate repair work thereof, and have a simple and shortened air path.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a system diagram of a cement raw material firing apparatus according to an embodiment of the present invention. The rotary kiln 1 has an axis slightly inclined downward toward the front side of the rotary kiln (right side in FIG. 1), and a planetary cooler 2 is integrally provided on the front side of the rotary kiln 1. In this cement raw material firing apparatus, the raw material powder is introduced into the floating heat exchanger 3 as its path is shown by the solid line arrow, and is suspended in hot gas to be preheated. The floating and heated raw material is calcined in a calciner 5 equipped with an auxiliary combustion furnace 4, and is fed into the rotary kiln 1 through a feed hood 6 provided at a fixed position. rotary kiln 1
Inside, the raw material is burned into clinker by a kiln burner 7, cooled by a planetary cooler 2 to become a product, and discharged from the lower part of a discharge hood 8. The air used to cool the clinker in the planetary cooler 2 is introduced from the bottom of the exhaust hood 8 as indicated by the dashed arrow, and a part of the air whose temperature has been raised by heat exchange with the clinker is exhausted from the planetary cooler 2. It is used as secondary air for combustion in the burner 4a of the auxiliary combustion furnace 4.

The remaining air is introduced into the rotary kiln 1 and used as combustion air for the burner 7. Combustion exhaust gas from the rotary kiln is led to an incinerator 5 through an input hood 6. The hot gas from the temporary furnace 5 passes through the floating heat exchanger 3 and is discharged by the induction fan 9. The rotary kiln 1 is rotatably supported by a plurality of (three shown in the figure) tires 10a to 10c fixed to its outer periphery.

A gear 12 meshing with a gear 11 fixed to the outer periphery of the rotary kiln 1 is driven by a drive source 13, so that the rotary kiln 1 and the planetary cooler 2 are rotated integrally. A seal is maintained on the rotary kiln 1's rotary kiln 1 (left side in Figure 1) by a sealing device in which a sliding bale surface formed at the end and a support surface formed on the input hood 6 slide against each other. It's dripping. The rotary kiln is prevented from moving in the axial direction by a thrust roller 14 that supports a tire 10a on the butt side of the rotary kiln. Figure 2 shows rotary kiln 1
2 is an enlarged side view showing a part of the planetary cooler 2. FIG.

The end 16 of the rotary kiln on the front side of the rotary kiln is bulged outward in the radial direction to have a large diameter in order to connect the rotary kiln 1 and the planetary cooler 2. The support cylinder 17 is fixed integrally. On the outer periphery of the support tube 17, there are planet-shaped holes spaced apart in the circumferential direction.
A plurality (11 in this embodiment) of cooling cylinders 18 having axes parallel to the marquee line of the rotary kiln are arranged. The cooling cylinder 18 is supported by the support cylinder 17 via a support member 19. The end portion of the cooling cylinder 18 on the rotary kiln 1 side is provided with a flange 76 so that it can be attached and removed freely. They are connected via a mechanical chute 22 in a structure that is hermetically sealed and capable of absorbing thermal expansion. Chute 22 is connected to closure 21 by a flange 77. The end of the cooling node 18 on the discharge hood 8 side is connected to the discharge hood 8 so as to be rotatable around the axis of the rotary kiln 1 . The support tube 17 is rotatably covered by a discharge hood 8. FIG. 3 is a perspective view of the vicinity of the inlet chute portion 20 of the cooling cylinder 18.

Note that FIG. 3 is an example, and is not limited to the present invention. When the cooling cylinder 18, which is being rotated integrally with the rotary kiln 1 in the direction of the arrow 24, reaches the lowest rotational position as shown in the third figure, clinker is released from the chute 22 located at the top of the cooling cylinder 18. is falling. As the cooling cylinder 18 rotates to the upper rotational position,
The clinker is guided by the rutted surface 20e and the conical surfaces 20c and 20d, and is quickly moved inward in the rutted direction of the cooling cylinder 18. Therefore, even when the cooling cylinder 18 reaches the uppermost rotational position and the chute 22 is located at the lower part of the cooling cylinder 18, clinker is not returned from the chute 22 into the rotary kiln 1. The chute 22 has the function of dropping the clinker from the rotary kiln 1 into the cooling cylinder 18, introducing the air heated in the cooling cylinder 18 into the rotor kiln, and branching out the secondary air for the auxiliary combustion furnace 4 for rotation. It has a function of introducing into the half member 27. FIG. 4 is a sectional view taken along the section line WW in FIG. 2.

Branch pipes 26 extending toward the end of the rotary kiln 1 along the axis of the rotary kiln 1 are air-sealed by flanges 78 and connected to the chute 22 in a structure capable of absorbing thermal expansion. This branch pipe 26 is airtightly sealed to an annular rotating half-split member 27 that surrounds a small portion la on the side of the hook butt rather than the bulged end 16 of the rotary kiln 1, and absorbs thermal expansion. Connected in the structure you get. The rotating half member 27 includes a plurality of (11 shown) support members 2 extending in the radial direction of the rotary kiln 1 and arranged at equal intervals in the circumferential direction.
At 8, it is fixedly supported on the rotary kiln 1. The rotary half-split member 27 is open on the hook butt side, and its axis-perpendicular cross section (i.e., the cross section including the marquee line of the rotary kiln) has a diameter larger than that of the branch pipe 26 and has a diameter of 180 mm for the purpose of preventing dust accumulation. It is formed in the shape of a circular arc with a central angle that exceeds 100 degrees. For the purpose of returning the settled dust into the cooling cylinder 18 , the branch pipe 26 is connected tangentially to the arc-shaped inner surface of the rotary half member 27 radially outward of the rotary kiln 1 .
5 is a sectional view taken along the section line V-V in FIG. 2, and FIG. 6 is a sectional view taken along the section line W- in FIG.

An annular movable half member 29 having a closed face opposite to the open square face of the rotating half member 27 is provided. The cross section of the movable half member 29 at right angles is formed into an arc shape with a central angle smaller than 180 degrees. An outward facing collar 30 is fixed to the outer periphery of the small diameter portion la of the rotary kiln 1, and a pair of rollers 31 having an axis perpendicular to the marling line of the rotary kiln 1 and supporting both end surfaces of the outward facing golden plate 30, Moving half member 2
It is supported by 9. This roller 31 is the rotary kiln 1
They are provided at multiple locations (four locations in the figure) at intervals of 90 degrees in the circumferential direction. As a result, the movable half member 29 follows the displacement in the axial direction due to thermal expansion and contraction from the tire 10a of the rotary kiln 1 to the outward facing golden plate 30.
can be moved. A ball 32 having a horizontal rattan line perpendicular to the rattan line of the rotary kiln 1 is fixed to the outer periphery of the movable half member 29, and this shaft 32 is supported by a bearing 34 mounted on a frame 33. The pedestal 33 is provided with a wheel 23, and the pedestal 33 can move in parallel to a vertical plane passing through the axis of the rotary kiln 1 in accordance with the movement of the movable half member 29. Moreover, the movable half-divided section 29 has a horizontal axis 32.
Since the rotary kiln 1 is pivotally supported by the rotary kiln 1, it is moved around the shaft 32 following the deflection along the axis of the rotary kiln 1.
The movable half member 29 has a conduit 3 extending toward the hook butt side.
5 are connected to the rotary kiln at intervals of, for example, 90 degrees in the circumferential direction.

Each pipe line 35 has elasticity and a joint 36 with good sealing properties.
It is connected via a conduit 37 to an air hood 38 provided at a fixed position. This air bleed hood 38 is connected to the auxiliary combustion furnace 4 via an air duct 39. The joint 36 is connected to the movable half member 29. The movable half member 29, which follows the displacement of the rotary kiln 1, is allowed to pivot around the shaft 32, which follows the deflection of the rotary kiln 1. A rotary half member 27 fixedly connected to the planetary cooler 2 and rotating integrally with the rotary kiln 1 and a movable half member 29 supported by a frame 33 via a horizontal shaft 32 are opposed to each other. The parts are sealed by a sealing device 401, which will be described in detail later.

Annular space 4 formed by both halves 27 and 29
1, aerated air is introduced through a branch pipe 26 from a chute 22. At this time, the dust that enters with the air partially settles in the space 41, but is returned to the cooling cylinder 18 at the lowest rotational position. Therefore, blockage of the annular space 41 does not occur, and drifting of the air between the cooling tubes 18 is prevented. FIG. 7 is an enlarged sectional view of the vicinity of the sealing device 40. A short cylindrical rotary seal member 42 that surrounds the rotary half member 27 is fixed to the peripheral wall of the rotary half member 27 via a support plate 43 . Inwardly and outwardly of the rotary seal member 42 in the radial direction of the rotary kiln 1 are short cylindrical movable seal members 45, 4 connected by a connecting piece 44.
6 is provided facing the rotary seal member 42. The movable seal members 45 and 46 are fixed to the movable half member 29 via a support plate 47. The connecting piece 44 connects to the movable seal member 45
, 46, are provided in multiple directions at intervals,
A coil 48 is wound around each connecting piece 44 . The movable seal members 45, 46 are provided with a cover 49 made of an insulating material, such as stainless steel or a ceramic material, over the entire circumference, on the opposite side of the rotary seal member 42 with respect to the connecting piece 44. Rotating and moving seal member 42
, 45 and 46 are made of a material with high magnetic permeability. coil 4
The wire 8 is formed by winding insulated copper wire with excellent heat resistance, and may be made of an alumite-treated copper wire or a copper wire with asbestos wound around the outer periphery. The movable seal members 45 and 46 have two sets of annular protrusions 50a and 50b;
b are provided at intervals in the axial direction of the movable seal members 45 and 46. Each protrusion 50a, 50b, 51a, 51
Magnetic particles 52 made of a high magnetic permeability material are interposed in the gap between b and the rotary seal member 42. The magnetic powder 52 may be pure iron or an alloy of pure iron, aluminum, and chromium. Due to the lines of magnetic force generated from the coil 48 as shown by the arrows, the magnetic particles 52 are aligned with each of the protrusions 50a, 50b, 51a,
It is held in the gap between 51b and the seal member 42. According to such a sealing device 40', since the magnetic powder 52 has fluidity, the rotary seal member 42 is allowed to rotate integrally with the rotary half member 27, and the rotary seal member 4
2 and the movable seal members 45 and 46 are allowed to be relatively displaced in the axial direction of the rotary kiln 1.

Moreover, since the seals are provided at four locations for each of the protrusions 50a, 50b, 51a, and 51b, airtightness is excellent. In addition, unlike conventional sealing devices, there is no need to process the sealing surface with high precision, and the sealing surface is not worn out by clinker, which has a relatively high hardness, so it has a long life. Also, each protrusion 50a
, 50b, 51a, 51b and the rotary seal member 42 in different directions, the magnetic field strength is increased for members with large gaps, and is decreased for parts with small gaps. The sealing performance can be changed by changing the magnetic field strength of the coil 48. The coil 48 may be divided into units in the circumferential direction of the movable seal members 45 and 46, so that the coil 48 can be easily replaced in the event of a failure.

As another embodiment of the present invention, as shown in FIG. You can also press it to the side.

Also, as shown in FIG. 9, a wheel weight device 85 that pulls the movable half-split member 29 toward the front side of the rotary kiln along the wisteria line.
Alternatively, a weight 86 may be provided to pull the movable half member 29 to the rotary half member 27 legs. 10 is a sectional view taken along the section line XX in FIGS. 8 and 9, and FIG. 11 is a sectional view taken from the section line phantom--phantom in FIG. 10.

An outward flange 87 is provided on the outer periphery of the movable half member 29 and is perpendicular to the marking line of the rotary kiln 1. On the outer periphery of the rotary half member 27, a roller 88 having an axis perpendicular to the yaw line of the rotary kiln and in contact with the outward facing collar 87 is arranged at intervals of, for example, 90 degrees in the circumferential direction with respect to the support member 89. It can be set up. The movable half member 29 is the cylinder 8 in FIG.
0 or the car key device 85 in FIG.
Therefore, the roller 88 comes into contact with the outward facing collar 87, and the distance between the sealing surfaces of the two half members 27, 29 is always kept constant. FIG. 12 is a sectional view of the vicinity of the sealing device 63 of another embodiment of the present invention, and parts corresponding to the embodiments of FIGS. 1 to 7 are given the same reference numerals.

An annular rotary seal member 54 is simultaneously fixed to the peripheral wall of the rotary half-split portion 27 over the entire circumferential direction. Annular movable seal members 56 and 57 connected by a connecting piece 55 are provided on both sides of the rotary seal member 54, and the movable seal members 56 and 57 are fixed to the movable half member 29 via a support plate 58. be done. The seal members 54, 56, 57 are made of a material with high magnetic permeability. moving seal member 56,
57 is provided with two pairs of annular projections 59 and 60 that face each other with a rotary seal member 54 interposed therebetween and are spaced apart from each other in the radial direction of the rotary kiln 1. Each annular projection 59, 60
A saline powder 52 is placed in the gap between the rotary seal member 54 and the rotary seal member 54 . A coil 48 is wound around the connecting piece 55, and the entire outer circumference of the coil 48 is covered with a cover 61. FIG. 13 is a sectional view of a seal ring 62 according to another embodiment of the present invention.

A short cylindrical rotary seal portion 6 is provided on the outer periphery of the rotary half member 27.
3 is fixed via a support plate 64. A pair of annular movable seal members 65 and 66 are provided radially outward of the rotary seal member 63 at a distance in the axial direction, and the movable seal members 65 and 66 are connected to the movable half member through a support plate 67. It is fixed to 29. A coil 48 is provided on a connecting piece 68 that connects the movable seal members 65 and 66, and magnetic particles 52 are interposed in the gap between the outer circumferential surface of the rotary seal member 63 and the inner circumferential ends of the movable seal sections 65 and 66. Seal. FIG. 14 is a sectional view of a sealing device 70 according to another embodiment of the present invention.

In this embodiment, a circular ring-shaped rotary seal member 71 that is perpendicular to the axis of the rotary kiln 1 is fixed to the peripheral wall of the rotary half village 27 . Short cylindrical movable seal members 72 and 73 perpendicular to the rotary seal member 71 are provided in a double concentric manner, and the magnetic powder 52 is interposed in the gap between the side surface of the rotary seal member 71 and the end of the movable seal members 72 and 73. and seal. The movable seal sections 72 and 73 are connected by a connecting piece 74, and are fixed to the movable half member 29 via a support plate 75. At the end of the rotary kiln 1 on the rotary kiln butt side, the sealing devices 40 and 5 of each of the above-described embodiments are replaced with the sealing device using the brush.
It may be sealed with a sealing device having a structure similar to No. 3, 62, and 70, and in this case, compared to sealing after sliding,
There is no failure due to wear on the sealing surface, and the lifespan is extended.

A permanent magnet may be used in place of the coil 48 in each of the embodiments described above.

In accordance with the spirit of the invention, the movable half member 29 may alternatively be left in a fixed position and the rotating half member 27
It is particularly pointed out that it is important that the configuration is opposite, and that such variations are also contemplated according to the invention.

As described above, according to the present invention, a part of the citrus gas from the cooling cylinder is guided through the rotating half section and the opposing half section opposite to the rotating half section. Therefore, unlike the prior art described above, the present invention does not cover a part of the cooling cylinder with the yuzu hood, and therefore, it is possible to suppress the occurrence of failures due to heat, and to facilitate repair work. be. Furthermore, it is possible to simplify and shorten the air path downstream from the opposing half-split member.

[Brief explanation of drawings]

FIG. 1 is a system diagram of a cement raw material firing apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged view showing a part of the rotary kiln 1 and planetary cooler 2, and FIG. 3 is a diagram of the end portion 18 of the cooling cylinder 18. A perspective view of the vicinity of the end portion 20, FIG. 4 is a cross-sectional view taken from the cross-sectional view W-W in FIG. 2, and FIG. 5 is a cross-sectional view taken along the cross-section line V in FIG.
6 is a sectional view of the sectional view of FIG. Each side view of another embodiment of the invention, FIG. 10 is a sectional view along the section line X--X of the embodiment of FIGS. 8 and 9, and FIG. 11 is a sectional view taken along the section line X-X of FIG. Cross-sectional views along the illusion, Figures 12, 13, and 14
The figure shows sealing devices 53, 62, and 70 of another embodiment of the present invention.
FIG. 1...Rotary kiln, 2...Planetary cooler, 4.
...Furnace auxiliary combustion, 5... Temporary bran furnace, 17...
・Support tube, 18...Cooling tube, 22...
Chute, 26...Branch pipe, 27...
Rotating half member, 29...Moving half member, 40,
53, 62, 70... Seal device, 42, 54
, 63, 71... rotary seal member, 45, 46, 56,
57, 65, 66'72, 73...Moving seal section, 48...Coil, 52...Magnetic powder. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure T3 Figure 14

Claims (1)

[Claims] 1. A cooling cylinder is integrally provided on the outer periphery of the rotary kiln in a planetary shape parallel to its axis, and the end of the cooling cylinder is surrounded by a rotary kiln coaxially with the rotary kiln. disposing another opposing half member that communicates with the annular rotating half member integral with the rotary kiln, has an opening surface opposite to the opening surface of the rotary half member, and surrounds the rotary kiln; A duct for leading out the bleed gas is connected to the opposing half member, and the mutually opposing portions of the rotating half member and the opposing half member facing thereto are sealed by a sealing device over the entire circumference. An extraction type planetary cooler featuring: 2. The bleed air planetary cooler according to claim 1, wherein the opposing half-split member is movable along with the rotary kiln in the axial direction. 3. The bleed air planetary cooler according to claim 1, wherein the opposing movable half members are angularly displaceable around an axis perpendicular to the rotary kiln axis. 4. The seal device includes a rotary seal member made of a high magnetic permeability material integrally provided on the rotating half member, and a rotary seal member made of a high magnetic permeability material integrally provided on the opposing half member. Claim 1, further comprising: another sealing member facing with a gap therebetween; magnetic powder interposed in the gap; and a magnet forming a magnetic field in the gap. Extraction planetary cooler. 5. Claims 2 or 3, characterized in that the thermal expansion force of the kiln itself or an external force from a fluid device, a weight device, etc. is used as the driving force for axial movement of the opposing moving half members. Bleed air planetary cooler. 6. The planetary cooler according to claim 5, wherein the seal sliding surface interval between the rotating half-split member and the opposing movable half-split member is maintained at a constant interval by a roller or the like.