JP2004271142A - Rotary furnace heating treatment device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily attach and detach a seal part of a rotary furnace heating treatment device. <P>SOLUTION: The seal part 13 of the rotary furnace heating treatment device is composed of a gland packing 4 engaging with the outer periphery of a rotary furnace 8, a packing engaging part 14b provided in an exhaust box 14 to engage with outer end of the gland packing 4, a packing chamber frame 21 surrounding an outer peripheral side of the gland packing 4, divided freely in the peripheral direction, and connected with the packing engaging part 14b, and a packing retainer 25 connected with the packing chamber frame 21 to press the gland packing 4 in the packing chamber frame 21 outward in the axial direction. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rotary furnace heat treatment device.
[0002]
[Prior art]
Generally, heat treatment such as drying treatment or pyrolysis treatment (carbonization treatment) is performed on various objects to be treated (various sludges, organic substances, scrap materials generated in production activities, etc.). In this method, an object to be treated is introduced into a rotary furnace, and the object to be treated is thermally decomposed by indirect heating from the outside to be treated. The advantage of such indirect heating is that the object to be treated is not directly heated, but the moisture is removed by thermal decomposition to obtain a dry substance, or further heated to decompose and remove combustible volatile components to obtain a carbide. Therefore, the characteristics of the material of the object can be utilized. However, in the indirect heating, since the decomposition is performed by restricting the intrusion of air into the rotary furnace, the airtightness of the seal portion located between the fixing members at both ends of the rotary furnace is important. In other words, if air enters without the sealing part fully performing its function, the decomposed flammable components will ignite and burn inside the rotary furnace, damaging the device or performing stable heat treatment. Became difficult.
[0003]
Patent Literature 1 and Patent Literature 2 are examples of a rotary furnace heat treatment apparatus provided with a seal portion of this type, and particularly the configurations shown in FIG. 8 of Patent Literature 1 and FIG. 2 of Patent Literature 2 are common. . Therefore, referring to FIG. 5, these structures will be described. Reference numeral 1 denotes a cylindrical rotary furnace, and a heating means for heating the rotary furnace 1 is provided on the outer peripheral side. Reference numeral 2 denotes a discharge box to which an object to be processed is fixed, which is located at an end of the rotary furnace 1. A seal portion is provided between the rotary furnace 1 and the discharge box 2 to prevent the release of hot air and the intrusion of external air. 3 are provided.
[0004]
In the seal portion 3, the discharge box 2 is provided with a cylindrical portion 2a, and at the outer end in the axial direction of the cylindrical portion 2a, a packing engaging portion 2b protruding radially inward is provided. At the end, a mounting portion 2c protruding radially outward is provided. As shown in FIG. 6, a gland packing 4 is inserted between the cylindrical portion 2a and the rotary furnace 1 in the axial direction using a tool. Reference numeral 5 denotes a gasket comprising a cylindrical portion 5a having an outer diameter substantially equal to the inner diameter of the cylindrical portion 2a, and a protruding portion 5b formed at the axially inner end of the cylindrical portion 5a so as to protrude radially outward. As shown, the mounting screw 6 inserted into the insertion hole 5c provided in the protruding portion 5b is screwed into the female screw portion 2d of the mounting portion 2c, so that the gland packing 4 is connected to the cylindrical portion 5a of the packing retainer 5 by the packing. It is held between the joint 2b. Thus, the seal part 3 is constituted by the cylindrical part 2a, the packing engaging part 2b, the mounting part 2c, the gland packing 4, the packing holder 5, and the mounting screw 6.
[0005]
[Patent Document 1]
JP-A-6-300453 (FIG. 8)
[0006]
[Patent Document 2]
JP-A-60-159585 (FIG. 2)
[0007]
[Problems to be solved by the invention]
However, in the above-described conventional rotary furnace heating apparatus, since the cylindrical portion 2a, the packing engaging portion 2b, and the mounting portion 2c of the discharge box 2 are integrally formed, the replacement of the gland packing 4 is easy. Did not. On the other hand, the gland packing 4 deteriorates unless it is replaced periodically, and air enters from this portion, and the decomposition gas is ignited and burned. Further, since the rotary furnace 1 expands and contracts as indicated by an arrow 7 due to heat, it was not easy to connect the rotary furnace 1 to a drive source for rotating the rotary furnace 1.
[0008]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and can easily perform attachment and detachment of a packing material of a seal portion, facilitate maintenance and inspection, and reduce rotation time that can be stopped. It is intended to obtain a furnace heat treatment device.
[0009]
[Means for Solving the Problems]
The rotary furnace heat treatment apparatus according to claim 1 of the present invention is configured such that an object to be processed is charged from one end side of a rotatably supported rotary furnace through an input box, and the object to be processed is rotated at the other end side of the rotary furnace. A rotary furnace heat treatment apparatus for discharging or moving to the next rotary furnace through a discharge box and performing heat treatment by indirect heating from the outer peripheral side of the rotary furnace, wherein the distance between the charging or discharging box and the rotary furnace is In a rotary furnace heat treatment apparatus provided with a seal portion for hermetically sealing the sealing member, a seal member is provided for engaging the outer periphery of the rotary furnace with a packing member provided on the box and engaging with an end of the packing member. A mating portion, a packing chamber frame that surrounds the outer peripheral side of the packing member and is divideable in the circumferential direction and is connected to the packing engaging portion, and is connected to the packing chamber frame, and rotates the packing member in the packing chamber frame. Furnace shaft It is obtained constituted by a packing gland which presses the direction.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a front view of a rotary furnace heat treatment apparatus according to an embodiment of the present invention, in which a rotary furnace 8 indirectly transfers an object to be processed (as described above, sludge, organic substances, and scraps generated in production activities). Drying and thermal decomposition can be performed by heating, and an external heating means 9 for heating the rotary furnace 8 from outside is provided around the rotary furnace 8, and hot air gas is introduced into the external heating means 9. The hot blast gas is discharged and circulated after the rotary furnace 8 is externally heated. A rotary heating furnace 10 is formed by the rotary furnace 8 and the external heating means 9 and is used as a drying furnace and a carbonizing furnace.
[0011]
An input box 12 for an object to be processed is provided on one end side of the rotary furnace 8 via a seal portion 11, and a discharge box 14 is provided on the other end side of the rotary furnace 8 also via a seal portion 13. A plurality of feed blades (not shown) for stirring and transporting the object to be processed are provided in 8. Further, annular protrusions 8a and 8b are provided on both ends of the rotary furnace 8, and the protrusions 8a and 8b are rotatably supported by rotation support rollers 15 and 16, and the rotation support roller 16 is connected to the rotation furnace 8 during heating. The flanges 16a are provided at both ends so that the discharge side of the rotary furnace 8 becomes a base point of the elongation even when the elongation occurs, and the flange 16a is fitted with the protrusion 8b. For this reason, the rotary furnace 8 mainly extends to the charging box 12 side. However, the rotary furnace 8 also extends a little to the discharge side. A sprocket 17 is provided at an end of the protruding portion 8b of the rotary furnace 8, and a chain 18 engaged with the sprocket 17 is engaged with a sprocket 20 attached to a motor 19 as a driving source.
[0012]
The object to be processed introduced from the introduction box 12 is introduced into the rotary furnace 8 via the guide 27. The rotary furnace 8 is driven to rotate by a motor 19, and the object introduced into the rotary furnace 8 is transferred to the discharge side while being stirred. As described above, the inside of the rotary furnace 8 is heated to a predetermined temperature by the hot air gas, and the object to be processed is dried (removed of water) by indirect heating to become a dried product. The dried product is further subjected to a thermal decomposition treatment (carbonization) by indirect heating. (Processed) to form carbides, and these dried products and carbides are taken out through the discharge box 14 as processed products. Further, gas to be processed such as steam, pyrolysis gas, and flammable components generated in the rotary furnace 8 is also taken out through the discharge box 14.
[0013]
FIG. 1 shows a vertical cross-sectional view of the seal portion 13. A cylindrical portion 14a having a diameter slightly larger than the outer diameter of the rotary furnace 8 is formed in the discharge box 14 so as to protrude inward in the axial direction. A packing engaging portion 14b protruding radially outward is formed. Reference numeral 21 denotes a cylindrical packing chamber frame that surrounds the outer peripheral side of the gland packing 4 that engages with the outer periphery of the rotary furnace 8, and has axially inner and outer ends provided with radially outwardly protruding portions 21a and 21b. Can be As shown in FIG. 3, the packing chamber frame 21 is divided into a plurality of pieces 22 in the circumferential direction, and each of the divided pieces 22 is connected. 21 are combined in a ring shape. An insertion hole 21c is formed in the protruding portion 21b, and a bolt 24 inserted in the insertion hole 21c is screwed into a female screw portion 14c provided in the packing engagement portion 14b, so that the packing engagement portion 14b and the protruding portion 21b are separated from each other. Be combined. Numeral 25 denotes a packing press comprising a cylindrical portion 25a having an outer diameter substantially equal to the inner diameter of the packing chamber frame 21 and a protruding portion 25b formed at the axially inner end of the cylindrical portion 25a so as to protrude radially outward. The bolt 26 inserted into the insertion hole 25c provided in the portion 25b is screwed into the female screw portion 21d provided in the protruding portion 21a of the packing chamber frame 21, whereby the packing retainer 25 and the packing chamber frame 21 are connected. You. The packing retainer 25 is also divided into a plurality in the circumferential direction and has a structure that can be integrated. The seal portion 11 has the same structure as the seal portion 13.
[0014]
Next, a procedure for forming the seal portion 13 will be described with reference to FIG. First, a plurality of gland packings 4 are wound around the outer periphery of the rotary furnace 8, and the ends thereof are temporarily fixed with an adhesive tape. Next, the divided pieces 22 of the packing chamber frame 21 are arranged on the outer periphery of the gland packing 4, are integrally mounted as the packing chamber frame 21, and the bolts 24 are inserted through the insertion holes 21c, and the female threads of the packing engagement portions 14b are inserted. The packing engagement part 14b and the packing chamber frame 21 are connected by screwing to the part 14c. Next, the packing gland 4 having a divided structure is integrated with the outer periphery of the rotary furnace 8, and the bolt 26 inserted into the insertion hole 25 c is screwed into the female screw portion 21 d of the packing chamber frame 21, so that the gland packing 4 is axially outward. And the packing retainer 25 and the packing chamber frame 21 are connected.
[0015]
In the above embodiment, since the packing chamber frame 21 surrounding the outer periphery of the gland packing 4 has a divided structure in the circumferential direction, the attachment / detachment and replacement of the gland packing 4 can be performed extremely easily, and maintenance and inspection are also facilitated. Downtime for maintenance can be reduced. Further, since the replacement of the gland packing 4 is facilitated, it is possible to prevent the gland packing 4 from deteriorating, invading air, and igniting and burning the decomposition gas. Further, the projection 8b provided on the discharge side of the rotary furnace 8 is fitted and fixed in position to the rotation support roller 16, and the sprocket 17 is provided near the projection 8b in the rotary furnace 8, Even when the furnace 8 expands and contracts due to heat, the position of the sprocket 17 does not change much, and connection with the motor 19 as a driving source is facilitated.
[0016]
In the above-described embodiment, the processing object input from one end of the rotary furnace 8 is discharged from the other end, but the discharged processing object is supplied to the next rotary furnace. You may do so.
[0017]
【The invention's effect】
As described above, according to the present invention, the packing chamber frame surrounding the outer periphery of the packing member has a circumferentially divided structure, so that the packing member can be easily replaced, and the decomposition gas is decomposed due to the ingress of air due to the deterioration of the packing member. Ignition and combustion can be prevented, and maintenance and inspection become easy.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a seal portion of a rotary furnace heat treatment apparatus according to the present invention.
FIG. 2 is a front view of the rotary furnace heat treatment apparatus according to the present invention.
FIG. 3 is a partial vertical sectional side view of a packing chamber frame of the rotary furnace heat treatment apparatus according to the present invention.
FIG. 4 is a view showing a procedure for forming a seal portion of the rotary furnace heating apparatus according to the present invention.
FIG. 5 is a longitudinal sectional view of a seal portion of a conventional rotary furnace heating apparatus.
FIG. 6 is a view showing a procedure for forming a seal portion of a conventional rotary furnace heating apparatus.
[Explanation of symbols]
4 ... Gland packing 8 ... Rotating furnace 9 ... External heating means 10 ... Rotating heat treatment furnaces 11 and 13 ... Seal part 12 ... Input box 14 ... Discharge box 14b ... Packing engagement parts 15 and 16 ... Rotation support roller 21 ... Packing chamber Frames 21a, 21b, 25b ... Projecting part 25 ... Packing holder

Claims (1)

An object to be processed is charged through an input box from one end of a rotatably supported rotary furnace, and the object to be processed is discharged from the other end of the rotary furnace through a discharge box or moved to the next rotary furnace, A rotary furnace heat treatment apparatus for performing heat treatment by indirect heating from the outer peripheral side of a rotary furnace, the rotary furnace heat treatment apparatus having a seal portion for hermetically sealing a gap between a charging or discharging box and a rotary furnace at the gap. In the above, the sealing portion, a packing member that engages the outer periphery of the rotary furnace, a packing engagement portion that is provided in the box and engages with the end of the packing member, and surrounds the outer peripheral side of the packing member and extends in the circumferential direction. A packing chamber frame, which can be divided into two parts and is connected to the packing engaging portion; and a packing holder which is connected to the packing chamber frame and presses the packing member in the packing chamber frame in the axial direction of the rotary furnace. Rotary kiln heat treatment apparatus according to claim.

Images