JPH1026327A - Expansion joint for pyrolysis reactor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an expansion joint for a pyrolysis reactor, which is excellent in durability, expandable into the axial direction of the pyrolysis reactor and provided with sealing function, by a method wherein the joint is constituted of a first unit casing, a second unit casing and a metallic bellows arranged between both of the casings. SOLUTION: The expansion joint of a pyrolysis reactor 1 seals in accordance with the thermal expansion of a drum main body while absorbing the change of distance between a heating fluid inlet header 5 and an inlet port channel 9. A first casing 7 is constituted of a first unit casing 17, whose one end is attached to the heating fluid inlet header 5, a second unit casing 18, whose one end is attached to the inlet port channel 9, and a metallic bellows 19, connecting the first unit casing 17 to the second unit casing 18. According to this method, when the heating fluid (a), supplied to the inlet port channel 9, flows to the heating fluid inlet header 5 through an interval (f) between a discharging port 14 and the first casing 7, surrounding the discharging port 14, the outflow of the heating fluid (a) can be sealed while the joint can be expanded into the axial direction thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expansion joint of a pyrolysis reactor, and more particularly to an expansion joint of 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] By the way, in this thermal decomposition reactor,
It is necessary to provide an expansion joint having a sealing function in order to prevent thermal decomposition products from leaking from the rotating drum main body and the fixed portion, or to prevent inflow of outside air, and a packing or the like is usually used for this expansion joint. . On the other hand, in such a pyrolysis reactor, an outlet chamber having a heating medium discharge pipe at one end of the drum body, and a heating medium outlet header communicating via a casing are attached. An outlet is provided at the other end, and an outlet for a pyrolysis product generated from the workpiece is provided at the other end.

In such a pyrolysis reactor, the drum body is heated and thermally expanded in order to supply a heating fluid (heating medium) to the inside. The degree of the thermal expansion is particularly large in the axial direction. Therefore, it is generally configured such that displacement between the outlet chamber and the heat medium outlet header, which are fixed portions, and between the inlet chamber and the heat medium inlet chamber is possible, and an expansion joint having a sealing function is disposed here. A canvas bellows is used as the expansion joint.

[0005]

According to the expansion joint in the thermal decomposition reactor as described above, durability is inferior due to the use of the canvas bellows, and heat loss from this expansion joint occurs. As a result, the thermal efficiency is reduced.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and has a heating fluid inlet header 5 and a heating fluid at both ends of a drum body 4 having a heat transfer tube 3 therein. An outlet header 6, which communicates the heating fluid inlet header 5 through a first casing 7 to an inlet channel 9 to which a heating fluid supply pipe 8 is attached;
In a pyrolysis reactor, the heating fluid outlet header 6 is connected to an outlet channel 12 to which a heating fluid discharge pipe 11 is attached via a second casing 10, and at least the first casing 7 is connected to the heating fluid inlet header. First unit casing 17 with one end attached to 5
A second unit casing 18 having one end attached to the inlet channel 9, a first unit casing 17 and a second unit casing 17.
Metal bellows 19 arranged between unit casings 18
The present invention provides an expansion joint for a pyrolysis reactor constituted by:

[0007] Preferably, a protective cylinder 20 is disposed inside the metal bellows 19 and has one end fixed to one of the first unit casing 17 and the second unit casing 18. At least the metal bellows 19 is covered with a heat insulating material 21. In the expansion joint of the thermal decomposition reactor configured as described above, the expansion and contraction of the drum body 4 in the axial direction is sucked and sealed by the metal bellows 19, and the metal bellows 19 is covered with the heat insulating material 21. Thus, heat loss can be prevented.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an expansion joint having a sealing function of 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 incorporated in a waste treatment device or the like, and is driven by a driving device 2 such as a motor around a rotation axis CL. It has a horizontal rotating drum body 4 which is rotated and provided with a heating tube 3 along the inner peripheral wall. A heating fluid inlet header 5 such as heated air a is arranged on one side of the drum body 4 and a heating fluid outlet header 6 is arranged on the other side of the drum body 4. The heating fluid inlet header 5 and an inlet channel 9 arranged adjacent to each other are connected to each other. The space is communicated via a first casing 7, and a heating fluid supply pipe 8 is attached to the inlet channel 9. Further, a heating fluid outlet header 6 is provided at the other end of the drum body 4.
And an outlet channel 1 provided with a heating fluid discharge pipe 11 and disposed adjacent to the heating fluid outlet header 6.
2 is communicated via a second casing 10.

[0009] The thermal decomposition reactor 1 has a screw feeder 13 for charging the object to be treated b, an outlet 14 for discharging the thermal decomposition product c, and An exhaust device 15 for separating gas d and pyrolysis residue e is provided, the inlet channel 9 and the exhaust device 1
5 is connected by a third casing 16. The distal end of a discharge port 14 extending from the center of the drum main body 4 and rotating with the drum main body 4 is inserted into the discharge device 15 and opened.

The heating fluid inlet header 5, the inlet channel 9, the discharge device 15, the heating fluid outlet header 6, and the outlet channel 12 are fixed members, and the drum body 4, the discharge port 1
Reference numeral 4 denotes a rotating member. With the thermal expansion of the drum body 4, the distance between the heating fluid inlet header 5 and the inlet channel 9, the distance between the inlet channel 9 and the discharge device 15, the distance between the heating fluid outlet header 6 and the outlet channel 12, and so on. Change respectively.

The present invention is directed to an expansion joint capable of sealing while absorbing the change in the distance. The first and second casings 7, 10 and the third casing 16
Each constitute an expansion joint. Since the first casing 7 and the second casing 10 have the same structure, the structure of the first casing 7 will be described with reference to FIGS.
As shown in the figure, the heating fluid inlet header 5 (fixing member)
The first unit casing 17 having one end attached to the first unit casing 17 and the second unit casing 17 having one end attached to the inlet channel 9 (fixing member).
The first casing 7 is formed by connecting the unit casing 18 with a metal bellows 19. A protection cylinder 20 having one end attached to the first unit casing 17 is disposed inside the metal bellows 19, and a heat insulating material 21 is provided outside the protection cylinder 20.

The heating fluid a supplied from the heating fluid supply pipe 8 to the inlet channel 9 is supplied to the heating fluid inlet header 5 through the space f between the outlet 14 and the first casing 7 provided so as to surround the outlet 14. Seals outflow as it flows. And the expansion and contraction of the thermal decomposition reactor 1 in the axial direction can be enabled. Incidentally, a part of the heating fluid a in the inlet channel 9 flows into the gap g (FIGS. 1 and 4) between the outlet 14 and the third casing 16. In order to prevent the heating fluid a from flowing out within the interval g, the third
As shown in FIG. 4, one end of a first metal bellows 23 is attached to the other end of the first unit casing 22 having one end attached to the inlet channel 9 as shown in FIG.
The first seal ring 24 is attached to the other end of the metal bellows 23 of FIG.

A second metal bellows 26 is attached to the other end of the second unit casing 25, one end of which is attached to the discharge device 15, and a second seal ring 27 is attached to the other end of the second metal bellows 26. It is configured to be mounted. The first seal ring 2 is provided on both sides of a rotating ring 30 attached to the outer periphery of the discharge port 14 via an attachment member 29.
4 and the second seal ring 27 are attached so as to press.

Further, a protection cylinder 31 having one end fixed to the inner surface of the first unit casing 22 is provided with a first metal bellows 2.
3 and the second unit casing 25
A protection cylinder 32 having one end fixed to the inner surface of the second metal bellows 26 is disposed on the inner surface of the second metal bellows 26.
3, 26 are protected. Furthermore, these metal bellows 2
A heat insulating material 33 is provided to cover the outer surfaces of the heat insulating members 3 and 26.

Therefore, when the discharge port 14 rotates together with the drum main body 4, the rotary ring 30 rotates. However, the first seal ring 24 and the second seal ring 27 are slidably contacted on both surfaces, and the rotation is allowed. The change in the distance between the first unit ring 22 and the second unit ring 25 is absorbed by the first metal bellows 23 and the second metal bellows 26. The heating fluid is supplied to the left side of the rotating ring 30 in FIG.
It is prevented from being blown into the side.

[0016]

As is apparent from the above description, according to the expansion joint of the pyrolysis reactor according to the present invention, the heating fluid inlet header 5 provided at least on the side of the drum body 4 is provided.
And the inlet channel 9 are communicated with the casing 7 having the metal bellows 19 so as to be sealed, so that it has good durability, and can be expanded and contracted in the axial direction of the thermal decomposition reactor, and has a sealing function. It can be an expansion joint.

Further, by disposing the heat insulating material 21 at least outside the metal bellows 19, heat loss can be prevented, and as a result, there is an effect that a thermal decomposition reaction with high thermal efficiency can be performed.

[Brief description of the drawings]

FIG. 1 is a partially broken side view of a pyrolysis reactor according to the present invention.

FIG. 2 is an enlarged sectional view of a portion A in FIG.

FIG. 3 is an enlarged sectional view of a portion B in FIG. 2;

FIG. 4 is an enlarged cross-sectional view of a portion C in FIG. 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Pyrolysis reactor 2 Drive 3 Heating pipe 4 Drum main body 5 Heating fluid inlet header 6 Heating fluid outlet header 7 First casing 8 Heating fluid supply pipe 9 Inlet channel 10 Second casing 11 Heating fluid outlet 12 Exit channel DESCRIPTION OF SYMBOLS 13 Screw feeder 14 Discharge port 15 Discharge device 16 3rd casing 17,22 1st unit casing 18,26 2nd unit casing 19 Metal bellows 20,31,32 Protection cylinder 21,33 Insulation material 23 1st metal Bellows 24 First seal ring 26 Second metal bellows 27 Second seal ring 30 Rotating ring

Claims (3)

[Claims] 1. A heating fluid inlet header 5 and a heating fluid outlet header 6 are arranged at both ends of a drum main body 4 containing a heat transfer tube 3, and the heating fluid inlet header 5 is supplied with a heating fluid via a first casing 7. In a pyrolysis reactor which communicates with an inlet channel 9 to which a tube 8 is attached and which communicates said heated fluid outlet header 6 via a second casing 10 to an outlet channel 12 to which a heated fluid outlet tube 11 is attached. A first unit casing 17 in which at least the first casing 7 is attached at one end to the heating fluid inlet header 5;
A second unit casing 18 having one end attached to the inlet channel 9, a first unit casing 17 and a second unit casing 17.
Metal bellows 19 arranged between unit casings 18
An expansion joint for a pyrolysis reactor, comprising: 2. A protection cylinder 20 disposed inside the metal bellows 19 and having one end fixed to one of the first unit casing 17 and the second unit casing 18. Expansion joint of pyrolysis reactor. 3. A heat insulator 2 comprising at least a metal bellows 19;
The expansion joint of the pyrolysis reactor according to claim 1, wherein the expansion joint is coated with 1.