JPH102524A - Seal mechanism for pyrolysis reactor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mechanism, effecting the sealing between the fixed part and rotated part of a pyrolysis reactor surely. SOLUTION: In a pyrolysis reactor, provided with an opening, having the same rotary axis as a drum main body and provided at least one end of a horizontal type rotary drum main body, a fixed part, surrounding the opening part, is provided and a first ring 20, rotated integrally with the drum main body, is attached to the opening, then, the side surface of a second ring 22 is contacted with the side surface of the first ring 20 through a pressure and the second ring 22 is attached to a fixed part through a seal member 23 constituted of a flexible member having a U-shape section while a pressure-contacting means is provided between the second ring 22 and the fixed part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing mechanism for a pyrolysis reactor, and more particularly to a sealing mechanism for a pyrolysis reactor used as one of chemical equipment and waste treatment equipment.

[0002]

2. Description of the Related Art Conventionally, an object to be treated is loaded into a horizontal rotary drum body as one of chemical equipment and waste treatment equipment,
There is known a pyrolysis reactor which heats a drum body with a heating fluid while rotating to thermally decompose an object to be processed and discharges generated thermal decomposition products.

[0003] In such a pyrolysis reactor, sealing is performed by providing a sealing mechanism to prevent leakage of pyrolysis products from between the rotating drum main body and the fixed portion or the inflow of outside air. ing. A packing or the like is usually used as such a seal mechanism.

[0004]

However, in the above-described sealing mechanism of the thermal decomposition reactor, a problem occurs when the thermal decomposition reactor is relatively large and is heated at a high temperature. That is, when this pyrolysis reactor is incorporated as one of waste treatment apparatuses, for example, high-temperature air of about 300 ° C. to 600 ° C. passes through the inside of the sealing mechanism and is heated to a high temperature. However, there is a problem that such a seal member is severely burnt and cannot be used practically.
Further, when the length of the thermal decomposition reactor is as long as several tens of meters, there is a problem that the deformation displacement due to thermal expansion and thermal contraction is large, so that the sealing function cannot be maintained.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the conventional sealing mechanism exposed to high temperature, and has at least one end of a horizontal rotary drum main body. In a pyrolysis reactor provided with an opening having the same rotation axis, a fixing portion surrounding the opening is provided, and a first ring that rotates integrally with the drum body is provided in the opening. Mounting, mounting the side of the second ring to the side of the first ring, pressing the side of the second ring against the side of the first ring, and connecting the second ring to a flexible member having a U-shaped cross section The present invention is to provide a sealing mechanism for a pyrolysis reactor having a pressure member provided between the second ring and the fixing portion, which is attached to the fixing portion via a sealing member.

[0006] The seal member is preferably made of cabellose bellows, and the second ring is movable in the axial direction of the drum main body. Second ring first
As a means for pressing against the side surface of the ring, for example, a leaf spring is selected, and a plurality of leaf springs are provided at predetermined intervals in the circumferential direction of the seal member. The leaf spring is configured so that one end is attached to the second ring and the other end is attached to the fixed portion along the seal member, that is, in a U-shaped cross section.

[0007] According to the sealing mechanism of the pyrolysis reactor configured as described above, the first ring is displaced when the drum body is thermally expanded or contracted by heating or cooling. The second ring follows easily, so that the sealing function is not lost and damage to the sealing mechanism can be prevented. The doughnut-shaped flexible sealing member having a U-shaped cross section expands in the outer peripheral direction and high-temperature heated air passes through the inside thereof. The second ring is moved while pressing the second ring against the side surface of the first ring that moves in the axial direction, and relative rotation between the two rings can be allowed. It can be carried out.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a sealing mechanism for a pyrolysis reactor according to the present invention will be described below with reference to FIGS. FIG. 1 is a partially cutaway side view of a pyrolysis reactor 1, which is designed to be incorporated into a waste treatment apparatus, and has a rotation axis CL centered by a driving device 2 such as a motor. And a horizontal rotating drum body 6 having an inlet header 4 and an outlet header 5 at both ends, and a heating fluid inlet header 7 and a heating fluid outlet header 8 as fixed parts. It is composed of

A casing 9a is formed at both ends of the drum main body 6 to form an opening on the input side of a waste a to be processed.
And a casing 9b forming an opening for discharging the pyrolysis product b to the discharge device 10. Reference numeral 11 denotes a screw feeder for feeding the waste a into the drum body 6. The screw feeder 11 includes a casing 13 having an inlet 12 and a screw shaft 14 having a screw 15 disposed sideways around the screw 13. It is configured.

Reference numerals 16a and 16b denote rotating annular members attached to the inlet header 4 and the outlet header 5, respectively.
Reference numerals a to 17d denote fixed annular portions attached to the heating fluid inlet header 7, the discharge device 10, and the heating fluid outlet header 8 as fixed portions, respectively. And the rotating annular member 16
As shown in FIG. 2, seal mechanisms 18a and 18b are provided between the fixed annular members 17a and 17b, respectively, and a seal mechanism 19 is provided between the fixed annular members 17c and 17b as shown in FIG. Is provided.

Since the seal mechanisms 18a and 18b have the same structure, one seal mechanism 18a will be described in detail. As shown in FIGS. 2 to 4, a first ring 20 is attached to a rotating annular member 16 a having one end attached to a side surface of the inlet header 4, and a second ring 22 facing the first ring 20. Is provided.

The second ring 22 is formed so as to have a U-shaped cross section, and is attached to one end of a sealing member 23 made of a flexible material such as a canvas bellows via an attaching member 24. And this sealing member 23
Is attached to an attachment member 26 attached to the heating fluid inlet header 7 which is a fixed portion. As shown in FIG. 3, a U-shaped leaf spring 27 is laminated along the outer surface of the seal member 23 having a U-shaped cross section,
Similarly, one end is attached to the first ring 22 and the other end is attached to the attachment member 26, respectively.

A plurality of the leaf springs 27 are preferably arranged so as to have a predetermined interval L in the circumferential direction of the seal member 23, and the side surface of the second ring 22 is formed by the spring force of the leaf spring 27. The first ring 20 is brought into pressure contact with a predetermined pressing force P. Of course, the pressing means is not limited to the leaf spring 27, but may be, for example, a helical spring.

As shown in a perspective view of a portion of the second ring 22 in FIG. 3, lubricating oil supply grooves 28a and 28b are formed on the side surface of the second ring 22 which is pressed against the first ring 20. Lubricating oil such as grease is supplied into the lubricating oil supply grooves 28a and 28b from a supply device (not shown) through the holes 29 and the pipe 30 communicating with the supply grooves 28a and 28b.

The second ring 22 is not limited to the above-described embodiment, but may be made of, for example, a ceramic material. In this case, it is not necessary to provide the lubricating oil supply grooves 28a and 28b, and the structure is simplified. You. Numeral 31 denotes a spray nozzle which is disposed above a press-contact portion between the first ring 20 and the second ring 22 as shown in FIGS. Cooling water is supplied to 31, and the press contact portion is cooled by the cooling water.

Reference numeral 33 denotes a support roller for the second ring 2.
2 is supported by a support shaft 34 attached to the heating fluid inflow header 7 via a bracket 35 so as to be laterally movable by a guide member 36 attached laterally to the heating fluid inflow header 7, and the second ring 22 is moved downward by its own weight. To prevent it from moving to. FIG. 5 shows another sealing mechanism 19.
A first ring 38 is attached to a casing 9b extending from the end of the drum body 6 and extending through the heating fluid inlet header 7, and a first ring 38 is attached to both side surfaces of the first ring 38. Is mounted such that the second rings 39a and 39b are pressed against each other. That is, a sealing member 40a having a U-shaped cross section is attached to the fixed annular body 17b having one end attached to the heating fluid inlet header 7, and a second ring 39a is attached to the sealing member 40a.

On the other hand, a seal member 4 having a U-shaped cross section is also provided at the other end of the fixed annular body 17c having one end attached to the discharge device 10.
The second ring 39b is mounted via Ob.
As shown in FIG. 3, a pressing force P is applied to the second rings 39a and 39b by a pressure contact means such as a leaf spring arranged along the seal members 40a and 40b. , 39b are the first ring 38
Are pressed against both sides of the

Each of the seal members 40a and 40b and the second rings 39a and 39b has the same structure as that of the embodiment shown in FIGS. 2 to 4. In addition, the spray nozzle 31 and the like are arranged, and the pressure contact portion is formed. It is designed to be cooled. In the pyrolysis reactor having the sealing mechanism configured as described above, the exhaust material a to be processed is charged into the casing 13 through the charging port 12 and then into the drum body 6 by the screw 15.

The heating fluid (air) c at a high temperature of about 300 ° C. to 600 ° C. is supplied to the heating fluid inlet header 7, the inlet header 4, and the heating pipe 3 arranged along the inner peripheral wall of the drum body 6.
Through the outlet header 5 and the heated fluid outlet header 8. The waste a is thermally decomposed by the high-temperature heating fluid c to generate a pyrolysis product b composed of a dry distillation gas and a pyrolysis residue, and the pyrolysis product b is disposed at a subsequent stage although not shown. To a combustor that is located.

The drum body 6 is heated by the high-temperature heating fluid c, and thermal expansion or contraction occurs when the supply of the heating fluid c is stopped when the operation is stopped. At this time, the first
Are displaced in the axial direction of the drum body 6, respectively. In this case, each of the second rings 22, 39a, 39b is provided with a pressing means such as a leaf spring and a flexible seal having a U-shaped cross section. Due to the action of the members 23, 40a and 40b, the first rings 20 and 38 follow up while being pressed against them, so that the sealing performance is not lost.

[0021]

As is apparent from the above description, according to the sealing mechanism of the pyrolysis reactor according to the present invention, the fixed side (the side) of the first ring 20, 38 attached to the rotating drum body 6 side. Heated fluid inlet header 7, discharge device 10
Etc.), the side surfaces of the second rings 22, 39a, 39b attached via a seal member having a U-shaped cross section are pressed against each other by press-contact means. The second rings 22, 39a, 39 respond to the axial displacement of the first rings 20, 38.
b has the effect that it can easily follow.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a thermal decomposition reactor having a sealing mechanism according to an embodiment of the present invention.

FIG. 2 is a partially cutaway enlarged view of a portion B in FIG. 1;

FIG. 3 is a perspective view of a seal mechanism.

FIG. 4 is a view taken in the direction of arrows AA in FIG. 2;

FIG. 5 is a partially cutaway enlarged view of a portion C in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Pyrolysis reactor 2 Drive 3 Heating tube
4 Inlet Header 5 Outlet Header 6 Drum Body 7 Heating Fluid Inlet Header 8 Heating Fluid Outlet Header 9a, 9b, 13
Casing 10 Ejector 11 Screw feeder 12
Inlet 14 screw shaft 15 screw 16a,
16b Rotating annular body 17a-17d Fixed annular body 18a, 18b, 1
9 Sealing mechanism 20, 38 First ring 24, 26 Mounting member 22, 39a, 39b Second ring 23, 40a, 40b Sealing member 27 Leaf spring 28a, 28b Lubricating oil supply groove 29 Hole 30
Pipe 32 Spray nozzle 33 Support roller 34
Support shaft 36 Guide member

Claims (4)

[Claims] 1. A pyrolysis reactor comprising an opening having the same rotation axis as the drum main body provided at least at one end of a horizontal rotary drum main body, wherein a fixing portion surrounding the opening is provided, A first ring that rotates integrally with the drum body is attached to the opening, a side surface of the second ring is pressed against a side surface of the first ring, and the second ring has a U-shaped cross section and A sealing mechanism for a pyrolysis reactor, wherein the sealing mechanism is attached to the fixing portion via a sealing member made of a flexible material, and pressure contact means is provided between the second ring and the fixing portion. 2. The seal member according to claim 1, wherein the seal member is constituted by a canvas bellows. 3. The pressure contact means according to claim 1, wherein one end is fixed to the second ring, and the other end is fixed to the fixing portion, and is constituted by a leaf spring arranged along the seal member. 4. The press-contact means according to claim 1, wherein a plurality of seal members are arranged at predetermined intervals in a circumferential direction of the seal member.