JPH09170738A - Waste supplying device in waste treating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of retaining the sealing property of a waste supplying unit for a pyrolytic reactor. SOLUTION: This device is constituted so that waste is supplied into a pyrolytic reactor 1 through a supplying device 7 to produce distillated gas and pyrolytic residue, consisting principally of a non-volatile constituent, through thermal decomposition by heating the waste under an atmospheric pressure, then, the distillated gas is separated from the pyrolytic residue and the pyrolytic residue is supplied to a separating device to separate it into combustible constituent and non-combustible constituent while the combustible constituent and the distillated gas are supplied into a melting furnace. In this case, the supplying device 7 is constituted of a cylindrical body 24, having a discharging port 22, whose one end is opened in the pyrolytic reactor 1 and the other end is provided with a waste supplying port 23, a sliding member 25, sliding in the cylindrical body 24, and a driving device 26 while the waste, supplied from the supplying port 23 to the cylindrical body 24, is pushed and shifted toward the discharging port 22 side of the cylindrical body 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste supply device in a waste treatment device, and more particularly to a waste treatment device in which a pyrolysis product obtained by thermally decomposing waste is burned in a melting furnace. Related to the waste supply device.

[0002]

2. Description of the Related Art As one of the treatment devices for general waste such as municipal solid waste and industrial waste including combustible substances such as waste plastic, the waste is supplied to a pyrolysis reactor by a supply device and is kept under atmospheric pressure. It is heated in a low oxygen atmosphere to generate a dry distillation gas and a thermal decomposition residue mainly consisting of non-volatile components, and after cooling this thermal decomposition residue, it is introduced into a separation device, in which the combustion component and ash content, such as metal and Separated into non-combustible components composed of debris such as earthenware, gravel, and concrete pieces, pulverize the combusted components, guide the pulverized combusted components and the dry distillation gas to a melting furnace that is a combustor, and burn in the melting furnace. For example, Japanese Patent Laid-Open No. 1-9816 discloses a waste treatment apparatus in which the generated combustion ash is formed into a molten slag, and the molten slag is discharged to be cooled and solidified.

In this type of waste treatment apparatus, a screw feeder is used when supplying waste to the pyrolysis reactor. That is, as shown in FIG. 4, in the thermal decomposition reactor 1, a screw 5 attached to a screw shaft is arranged in a casing 4 having a discharge port 2 having one end opened and a supply port 3 on the other end side. Screw feeder 6
The waste a supplied from the supply port 3 into the casing 4 is supplied into the thermal decomposition reactor 1 from the discharge port 2 while being pressed in a compacted state by the screw 5. At this time, since the waste a is pressed in a compacted state, the seal at the connecting portion between the thermal decomposition reactor 1 and the casing 4 is maintained, and the inside of the thermal decomposition reactor 1 is kept under atmospheric pressure.

[0004]

By the way, in the waste treatment apparatus having the waste supply apparatus of the above structure, when the amount of waste becomes large and the apparatus becomes large accordingly,
Inevitably, the screw feeder 6 also becomes larger. That is, since the diameter of the casing 4 is also increased, the sealing mechanism arranged between the pyrolysis reactor 1 rotating with respect to the casing 4 and the casing 4 becomes complicated.

Due to such a problem in the sealing mechanism, if the casing of the screw feeder 6 is made smaller in diameter to supply this large amount of waste, the number of revolutions is increased or the pitch of the screws is increased. However, in the former case, the abrasion of the screw is large and the durability is reduced. On the other hand, in the latter case, there is a problem that the waste rotates together with the screw 5, that is, a so-called co-rotation phenomenon is likely to occur and the waste cannot be supplied.

[0006]

The present invention has been made to solve the above-mentioned problems of the prior art, in which waste is supplied to a thermal decomposition reactor by a supply device, and Under atmospheric pressure to thermally decompose the waste to generate a dry distillation gas and a thermal decomposition residue mainly consisting of non-volatile components, separate the dry distillation gas and the thermal decomposition residue, and decompose the thermal decomposition residue. In a waste treatment device in which a substance is supplied to a separation device to be separated into a combustion component and a non-combustion line segment, and a combustion component and the dry distillation gas are supplied to a melting furnace, one end of the supply device is A tubular body having a discharge port opened in the pyrolysis reactor and a waste supply port provided at the other end, a sliding member that slides in the tubular body, and a drive device that drives the sliding member. Therefore, the waste material supplied from the supply port into the cylinder is discharged from the cylinder. There is provided a waste feed device in the waste disposal apparatus designed to push transferred to the mouth side.

[0007] Preferably, the sliding member is slidable between the position at which the tip of the sliding member can open the supply port provided in the cylindrical body and the position on the supply port side at a predetermined distance from the discharge port of the cylindrical body. In addition, the supply port can be closed when its tip reaches the end on the discharge port side. According to the waste supply device in the waste treatment device configured as described above, the waste supplied from the supply port into the cylindrical body is pressed by the sliding member to be in a consolidated state and transferred to the discharge port side.

At the end of the discharge port, the waste material is in a compacted state, and the discharge port is closed to perform a sealing action and maintain the state under atmospheric pressure in the thermal decomposition reactor. Then, it is pressed by the waste material transferred by the sliding member and is supplied from the discharge port into the thermal decomposition reactor.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a waste supply device in a waste treatment device according to the present invention will be described below with reference to FIGS. In FIG. 1, 7 is a waste supply device, and the waste a is supplied into the thermal decomposition reactor 1 by this waste supply device. A horizontal rotary drum is normally used for the thermal decomposition reactor 1, and the induction blower 8 provided near the chimney 19 is sealed by a sealing mechanism (not shown).
Due to this, the inside is attracted and becomes under atmospheric pressure (negative pressure).

The thermal decomposition reactor 1 is composed of a heat exchanger 9
The heated air b supplied via line L ₁ from 30
The waste a supplied after being heated to 0 ° C. to 600 ° C., ordinarily about 450 ° C., is thermally decomposed, and a dry distillation gas G ₁ and mainly non-volatile thermal decomposition residue c are generated. Then, the dry distillation gas G ₁ and the thermal decomposition residue c are separated by the discharge device 10, and the dry distillation gas G ₁ is supplied to the burner 12 of the melting furnace 11 constituting the combustor via the line L ₂ .

On the other hand, the thermal decomposition residue c discharged from the discharging device 10 is supplied to the separating device 13 having a cooling device. This separating device 13 is constituted by arranging a plurality of stages of sieving devices of, for example, 5 mm, 2 mm, and 1 mm, and mainly coarse non-combustible components d existing in the pyrolysis residue c, that is, metal and rubble, etc. Separated and removed. The combustion component e composed of relatively fine particles separated by the separator 13
The grinder 14 is preferably 'is a, the combustion component e' combustion component e which consists of the following fine 1mm the line L ₃
Is directly supplied to the burner 12 of the melting furnace 11 via a storage device (not shown).

The dry distillation gas G ₁ supplied via the line L ₂ , the combustion component e'supplied via the line L ₃ , and the combustion supplied via the blower 15 and the line L ₄ The working air f is mixed and supplied into the melting furnace 11 through the burner 12, and in the melting furnace 11, about 1,300
Combustion is performed at a high temperature of ° C, and the combustion ash generated at this time becomes molten slag h and falls into the water tank 16 to be cooled and solidified. The cooled and solidified slag is used as a building material such as a pavement material.

The combustion gas G ₃ in the melting furnace 11 is recovered and dust-removed by the heat exchanger 9, the waste heat boiler 17 and the dust collectors 18a and 18b via a line L ₅ , and a relatively low temperature and clean. It becomes combustion gas G ₃ and is attracted by the induced air blower 8 and discharged from the chimney 19 into the atmosphere. The line L ₆ connected to the discharge side of the dust collector 18b is the combustion gas G
Part of _{3 is} the separating device 13, specifically, the separating device 13
It is a line that supplies the cooling device built in. In addition, the waste heat boiler 17 disposed in the latter stage of the melting furnace 11
The steam turbine 21 is operated by the steam s generated by recovering the heat, and thereby the generator 20 is driven to recover the waste heat as electric power.

As shown in FIG. 2, the waste supply device 7 has a cylindrical body 24 having a discharge port 22 having one end opened into the thermal decomposition reactor 1 and a waste supply port 23 provided at the other end. A (cylinder) and a sliding member 25 (pressing body or plunger) are inserted into the cylindrical body 24 so as to be slidable in the direction of the arrow AA ', and a fluid cylinder 26 that uses air pressure or hydraulic pressure as a drive device. It is designed to be driven by.

Since the cylindrical body 24 serves as a guide cylinder for transferring the waste a while pressing it, either a cylindrical shape or a rectangular cylindrical shape can be used, but in reality, it is a cylindrical shape. Things are good. The tip 25a of the sliding member 25 is
In the range of the moving distance D from the position B where the waste supply port 23 provided in the cylindrical body 24 can be opened to the position C having a predetermined distance L from the end of the discharge port 22 through the discharge port 20. It is configured to be movable.

The sliding member 25 has the same sectional shape as the cylindrical body 24. Incidentally, 27 is a discharge pipe 28 provided near the predetermined position C on the discharge port 22 side of the tubular body 25.
Is a check valve attached to the cylinder 24 and releases pressure when the inside of the cylindrical body 24 is in a pressurized state. In the waste supply device 7 configured as described above, after sliding the sliding member 25 in the direction of arrow A in advance until the waste supply port 23 is completely opened, as shown in FIG. , Waste a
Is supplied from the waste supply port 23 into the cylindrical body 24.

Then, as shown in FIG. 3 (b), the fluid cylinder 26 is actuated so that the waste a filled in the cylinder 24 is discharged.
While pressing, the sliding member 25 is slid in the arrow A'direction. At this time, the degree of compaction of the waste a is gradually increased. When the tip 25a of the sliding member 25 reaches a predetermined position C, the discharge port 22 of the tubular body 24 is sealed with the waste a'compressed in the tubular body 24 as a kind of stuffing. . At this time, the rear end portion 2 of the sliding member 25
5b is adapted to simultaneously close the waste supply port 23 as shown in FIG. 3 (b).

After that, the sliding member 25 is again pulled in the direction of arrow A to supply the waste a into the cylindrical body 24 through the waste supply port 23, and the sliding member 25 is shown in FIG. 3 (c). like,
The sludge is slid in the direction of the arrow A ', and the waste a'consolidated by the compact waste a'formed thereby is fed into the thermal decomposition reactor 1 in the following manner.
The waste a becomes a block-shaped waste a ′ and closes the vicinity of the discharge port 22 at the end of the cylindrical body 24, and the next block-shaped waste a ″ is used to remove the previous waste a ′. It is sent out and supplied into the thermal decomposition reactor 1.

At this time, the air between the waste a'compressed first and the waste a'which is transferred next and becomes the sealing member is compressed, but when this pressure exceeds a predetermined value, The check valve 27 shown in 3 (a) is automatically opened,
This compressed air is discharged from the discharge pipe 28 to the atmosphere.

[0020]

As is apparent from the above description, according to the waste material supply device in the waste material treatment apparatus of the present invention, the waste material a supplied into the cylindrical body 24 is transferred to the cylindrical body 24.
Since the tip of the sliding member 25 that slides inside is pressed and supplied into the thermal decomposition reactor 1, the waste a is less worn and the waste a is reliably stored inside the thermal decomposition reactor 1. It is a device that can supply a large amount of waste a.
The effect is particularly large when the above is supplied.

[Brief description of the drawings]

FIG. 1 is a system diagram of a waste treatment device equipped with a waste supply device showing an embodiment of the present invention.

FIG. 2 is a side view of the waste supply device according to the present invention.

3 (a) to 3 (c) are explanatory views of the operation of the waste material supply device according to the present invention.

FIG. 4 is a side view of a conventional waste supply device.

[Explanation of symbols]

1 Thermal Decomposition Reactor 2,22 Discharge Port 3 Supply Port 4 Casing 5 Screw 6 Screw Feeder 7 Waste Feeding Device 8 Induction Blower 9 Heat Exchanger 10 Discharging Device 11 Melting Furnace 12 Burner 13 Separator 15 Blower 16 Water Tank 17 Exhaust heat boiler 18a, 18b
Dust collector 19 Chimney 20 Generator 21 Steam turbine 23 Waste supply port 24 Cylindrical body 25 Sliding member 26 Fluid cylinder 27 Check valve 28 Discharge pipe

Claims (3)

[Claims] 1. Waste is supplied to a thermal decomposition reactor by a supply device, and the inside of this thermal decomposition reactor is heated to atmospheric pressure to heat and decompose the waste, which is composed of dry distillation gas and mainly non-volatile components. Pyrolysis residue is generated, the carbonization gas and the pyrolysis residue are separated, the pyrolysis residue is supplied to a separation device to separate into a combustion component and a non-combustion line segment, and the combustion component and the carbonization residue are separated. In a waste treatment device adapted to supply gas to a melting furnace, an outlet opening into the pyrolysis reactor at one end of the supply device, and a cylinder provided with a waste supply port at the other end, It is composed of a sliding member that slides in the cylindrical body and a drive device that drives the sliding member, and presses and transfers the waste supplied from the supply port into the cylindrical body to the discharge port side of the cylindrical body. Waste supply device in the waste treatment device. 2. The device for driving the sliding member of the supply device comprises:
2. The drive device according to claim 1, comprising a cylinder mechanism that exerts a fluid pressure of pneumatic pressure or hydraulic pressure. 3. The sliding member is slidable between a position at which a tip of the sliding member can open a supply port provided in the cylindrical body and a position on the supply port side which is spaced a predetermined distance from the discharge port of the cylindrical body. The waste supply device for a waste treatment device according to claim 1, wherein the supply port is configured to be closed when the tip thereof reaches the end portion on the discharge port side.