JPS5830331A - Discharging device for residue of fluidized bed type treating furnace - Google Patents

Abstract

PURPOSE:To discharge the residues of a fluidized bed type treating furnace without gnawing and wrapping and with small abrasion by moving a piston-like extruding member having a large clearance from a discharge passage back and forth in said passage. CONSTITUTION:An extruding member 4 having a large clearance from a discharge passage 2 for fluidized media and residues in a fluidized bed type treating furnace is connected to a driving rod 5 in said passage 2 along the same and the rod 5 is operated to move the piston freely back and forth, thereby discharging said media and residues to the outside of the passage. Thus gnawing and wrapping of sheets are obviated, the abrasion of the device is reduced, and the residues are discharged with low driving power costs and high sealability.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a residue discharge device for a fluidized bed processing furnace, and in particular, to a discharge passage for a mixture of a fluidized medium and a residue, etc. connected to a discharge section of a fluidized bed processing furnace. In line with this, a piston-shaped extrusion member with a particularly large gap between the passage and the passage is reciprocated, and the extrusion member draws the mixture out of the passage and discharges it, thereby eliminating jamming and wrapping.
In addition to reducing wear and tear on the equipment, the ejection power can be reduced.
Moreover, the present invention relates to a residue discharge device for a fluidized bed processing furnace that has high sealing properties.

In general, fluidized bed treatment furnaces such as fluidized bed incinerators and fluidized bed pyrolysis furnaces use fluidized air to fluidize the materials to be treated, such as municipal waste and industrial waste, along with a fluidizing medium such as sand. A mixture consisting of incineration residue, etc., which is incinerated or thermally decomposed and gradually settles to the bottom of the furnace or the lower end of the inclined air diffuser plate after undergoing heat treatment, and a fluid medium is discharged outside the octopus. Conventionally, a screw conveyor for discharging the mixture was installed in the mixture discharge passage connected to the discharge port at the bottom of the furnace or at the lower end of the inclined air diffuser plate, and the mixture was discharged out of the furnace. Ta.

However, the mixture is composed of sand as a fluid medium, non-combustible metal pieces, stone blocks, wire, etc., and due to the structure of screw conveyors, it is easy to get stuck or wrapped around them, which can cause malfunctions or damage. The screw blades are severely worn,
Power consumption is high. Furthermore, in the case of a screw conveyor, if the mixture in the discharge passage is insufficiently filled, flowing air tends to blow out from inside the furnace. Furthermore, since the screw conveyor is exposed to hot sand as a fluidizing medium, the seal structure of the bearing portion of the screw conveyor is complicated and there are many problems.

This invention has been devised to effectively solve the above-mentioned conventional problems.

The purpose of this invention is to have a simple structure and no multi-rotating parts.
Since the gap is particularly large, there is no jamming or wrapping, and the product can be manufactured at low cost.The extrusion member can still discharge the mixture by just reciprocating a short stroke, so wear and tear on the FF and driving power can be reduced. It is an object of the present invention to provide a residue discharge device for a fluidized bed processing furnace that has a high sealing property and can reliably prevent air blowing in the discharge passage.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In Fig. 1, 1 is the discharge part at the bottom of the J-111 fluidized bed furnace, and below the discharge part 1 there is a fluidized medium such as sand discharged from the discharge part 1, and heat treatment in the processing furnace. A discharge passage 2 is provided for discharging a mixture M consisting of the removed residue and the like out of the furnace. The discharge passage 2 has a rectangular cross section,
In order to ensure the degree of filling of the mixture M in the passage 2 and to prevent part of the fluidizing air in the furnace from blowing through the passage 2, the discharge passage 2 is inclined slightly upward toward the discharge port 2a at the right end thereof. and the passage 2 has a sufficient sealing length r, (
For example, 1500TrUn).

As shown in FIG. 2, between the introduction part 2b of the mixture M in the discharge passage 2 located directly below the discharge part 1 and the discharge part 1, the mixture M in the discharge part 1 is branched into three directions. Guide paths 3, 3 are interposed to guide and supply the discharge passage 2 to the side of the introduction portion 2b.

The mixture M flowing from the guideway 3 into the inlet 2b is pushed out to the inlet 2b to discharge sand from the outlet 2a.
A cylindrical extrusion member 4 is movable along the passage 2 in the vicinity.
A drive rod 5 for reciprocating the extrusion member 4 is also provided. The left end of the drive rod 5 is integrally connected to the extrusion member 4, and the drive rod 5 is disposed horizontally in the discharge passage 2, with the right end 5a extending from the discharge port 2a. A hydraulic cylinder (not shown) serving as a driving device for reciprocating the rod 5 is connected via a universal joint such as a pin joint.

The extrusion member 4 reciprocates with a stroke S between the left end of the sand discharge passage 2 and the introduction part 2b by the drive rod 5, as shown in FIG. In order to do this, the upper plate 2c of the discharge passage 2 is provided with a guide member 6, which is in the shape of a trough and has a radius of curvature slightly larger than that of the extrusion member 4, and which guides the upper surface of the extrusion member 4 in a slidable manner. The reciprocating movement of the push-out member 4 is guided only by the guide member 6 on the "-" side, and a large gap d is provided between the push-out member 4 and the wall of the discharge passage 2, and the push-out member 4 is guided by the "-" side. 4 can move freely up and down, or d: sideways. The gap d is, for example, 15
It is approximately 0 m long, and is large enough to allow even the largest of the hard objects such as iron ingots in the residue to pass through freely.

At the left end of the discharge passage 2, a relief part 7 is airtightly formed to release the mixture M and facilitate the movement of the extrusion member 4 when the extrusion member 4 moves to the left. ! , and the discharge passage 2 is arranged such that the mixture M in the passage 2 is easily pushed out.
The cross section thereof is formed to gradually increase toward the discharge port 2a.

Next, the operation of this embodiment configured as described above will be described.

A mixture M consisting of a fluid medium, residue, etc. flows from the side of the introduction part 2b of the discharge passage 2 at a unique angle of repose through the protrusion part 1 and the guide passages 3, 3, and flows into the lower part of the upper plate 20. A space is formed. The push-out member 4 reciprocates left and right over a stroke s at low speed via a drive rod 5 driven by the operation of a hydraulic cylinder.

When the extrusion member 4 moves to the right, it pushes the mixture M in the control passage 2 to the right, and the mixture M is transferred to the discharge port 2a.
A predetermined amount is extruded and discharged.

When the extrusion member 4 moves to the left and returns, the mixture M
A portion of it is pushed into the relief part 7 by the extrusion member 4. During the reciprocating movement of the extrusion member 4, the mixture M in the relief part 7 is
Although it cannot contribute to the discharge of the mixture M by simply repeating the diagonal up-and-down movement, the existence of the relief portion 7 allows the extrusion member 4 to move to the left with a small force, and a thin drive rod 5 is sufficient.

1. When the extrusion member 4 returns to the left, the mixture M quickly flows from the guide paths 3, 3 into the introduction part 2b forming the same angle of repose again, and the amount of mixture M that has flowed is ,
By moving the extrusion member 4 to the right, it is pushed to the right and extruded.

When the extrusion member 4 makes such a reciprocating movement, the mixture M
It tends to levitate against the guide member 6, and always moves in contact with or close to the guide member 6 except when starting, and
The mixture M flows in from the side of the introduction part 2b, and since a space is always formed below the upper plate 20, the upper part of the extrusion member 4 is exposed to the space and does not move back and forth. Part 4
The reciprocating motion is easily made.

In addition, there is a large gap d between the extrusion member 4 and the wall of the discharge passage 2, and the extrusion member 4d does not rotate like a paint screw conveyor but simply moves back and forth, so there is no possibility of biting or winding. Furthermore, there is no need to worry about damage to the extrusion member 4, and there is less wear on the extrusion member 4, and only a small driving force is required. During the reciprocation of the extrusion member 4, the discharge passage 2 is almost always filled with the mixture M over its entire length, and the sealing length T,
is ensured, so blow-by of flowing air can be reliably prevented.

Next, another embodiment of the present invention will be described with reference to FIG.

In this embodiment, the discharge passages 2, 2 extend symmetrically from the introduction part 2b below the discharge part 1, and the discharge port 2a
, 2a are provided at two locations at both ends. and discharge passage 2
, 2, an extrusion member 4 is movably provided, and a driving rod 7 and a rod 5, 5 from both ends of the extrusion member 4 are inserted through the discharge passages 2, 2, and the extrusion members 4 are inserted into the discharge passages 2a, 2.
．． They are provided extending from each other. A reciprocating device, for example, a hydraulic cylinder (not shown) for tensioning, is connected to the tips of the drive rods 5, 5, and the extrusion member 4 slides or approaches the guide member 6 while maintaining the stroke S'. move back and forth.

In this embodiment, the mixture M flowing into the introduction section 2b is transferred to the discharge ports 2a, 2. It can be easily discharged, and the relief part 7 in the previous embodiment, which is a trench, is not required.

In the above embodiment, the cross section of the discharge passage 2 may be round instead of rectangular, or the extrusion member 4 may be formed into a rectangular parallelepiped shape. Although the extrusion member 4 is guided by the sliding guide member 6, the extrusion member 4 may be guided by a roller or the like using the space. Furthermore,
The discharge passage 2 does not necessarily have to be inclined upward toward the discharge port 2a, and the presence or absence of a gradual increase in the cross-sectional area of the trench or the amount of change thereof may be changed. Furthermore, the introduction part 2b may be located below the discharge part 1, and the mixture M may be introduced from one side of the introduction part 2b.

In addition, in the above-mentioned embodiment, the case where the application is applied to a type of fluidized treatment furnace that has a discharge section at the bottom is illustrated, but the invention is not limited to this, and for example, the case where the discharge section is located at the lower end side of the inclined diffuser plate is illustrated. Of course, it can also be applied to models.

As is clear from the above description, the present invention can exhibit the following excellent effects.

(1) There are no rotating parts, and hard objects such as iron ingots and stones, and wires, etc., do not get caught or become entangled.

(2) The structure is simple and can be manufactured at low cost.

(3) The reciprocating distance of the extrusion member is much smaller than the movement distance of the screw blades, resulting in less wear. Therefore, the driving power is also small and requires 9 feet.

(4) High sealing performance ensures prevention of air blow-out in the discharge passage.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the device according to the present invention;
2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a longitudinal sectional view showing another embodiment of the present invention. is an extrusion member, 5-piece drive rond, and M is a mixture. Patent Applicant: Nobuo Kinutani, Patent Attorney, Ishikawajima-Harima Heavy Industries Co., Ltd.

Claims (1)

[Scope of Claims] A residue discharge device for a fluidized bed treatment furnace that discharges residue treated in a fluidized bed to the outside of the furnace, which is connected to the discharge part of the treatment furnace and extends almost horizontally. , forming a discharge passage for a mixture such as a fluid medium and a residue, and providing a mixture extrusion member in the discharge passage so as to be able to reciprocate along the discharge passage;
A drive rod is provided, one end of which is connected to the extrusion member, the other end of which is inserted through the discharge passageway and extends outside the end of the passage to reciprocate the extrusion member, and the drive iron is actuated to discharge the extrusion member. Inside the aisle. 1. A residue discharge device for a fluidized bed processing furnace, characterized in that the residue discharging device for a fluidized bed processing furnace is configured so that the mixture in the discharge passage is pushed out toward the end of the passage when the driving rod is pulled.