JPH1038237A - Thermally decomposed residue processing apparatus in waste processing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for cooling a thermally decomposed residue in the vicinity of a drum body and hence not to supply inert gas. SOLUTION: A waste processing apparatus is adapted such that there are provided a thermal decomposition reactor 1 having a discharge hole 8 for producing a thermally decomposed residue (c) composed of carbonized gas G1 and mainly non-volatile components and discharging the carbonized gas G1 and the thermally decomposed residue (c), a cooling apparatus 9 for cooling the thermally decomposed residue (c), a separator for separating the thermally decomposed residue (c) cooled in the cooling apparatus 9 into a combustible component (d) and an incombustible component (e), and a combustor 12 for combusting the carbonized gas G1 and the combustible component (c). In the apparatus, there is disposed a supply apparatus for introducing the thermally decomposed residue (c) discharged from the thermal decomposition reactor 1 directly into the cooling apparatus (c).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal decomposition residue treatment apparatus in a waste treatment apparatus, and more particularly, to a method in which waste is heated and decomposed in a low-oxygen atmosphere at a pressure lower than atmospheric pressure, and the carbonized gas is mainly non-volatile And a pyrolysis residue comprising the components, separating the pyrolysis residue into a combustible component and a non-combustible component, and combusting the combustible component and the dry distillation gas. The present invention relates to a thermal decomposition residue treatment device in an apparatus.

[0002]

2. Description of the Related Art As one of processing devices for industrial waste including municipal waste and general waste and combustibles such as waste plastics, waste is put into a thermal decomposition reactor and placed in a low oxygen atmosphere below atmospheric pressure. The pyrolysis is performed by heating to generate a pyrolysis residue consisting mainly of non-volatile components and a dry distillation gas, and further, the pyrolysis residue is cooled and then supplied to a separation device to produce a combustible component mainly composed of carbon. For example, metal and pottery, gravel, separated into non-combustible components such as rubble such as concrete pieces, pulverized the combustible component, and the combustible component and the carbonized gas described above are combustors. A waste treatment apparatus is introduced into a melting furnace, and the combustion ash produced by the combustion treatment in the melting furnace is converted into molten slag, and the molten slag is discharged and solidified by cooling.
No. pp. 139 to 163.

[0003] In such a waste disposal apparatus,
The pyrolysis gas and pyrolysis residue generated in the pyrolysis reactor are guided from the outlet of the pyrolysis reactor into the discharge device and separated, where the pyrolysis gas separated is from the cracked gas line to the combustor. While being supplied to the burner of the melting furnace,
The pyrolysis residue is supplied to a cooling device. At this time, the discharge device is formed in a low oxygen atmosphere at atmospheric pressure or lower, and the carbon in the high-temperature pyrolysis residue is prevented from being oxidized. An inert gas is supplied into the cooling device to prevent oxidation. A sealing mechanism such as a double gate is disposed between the cooling device and the discharging device.

[0004]

In the thermal decomposition residue treatment apparatus in the conventional waste treatment apparatus as described above, it is necessary to supply a special inert gas into the cooling device. Therefore, this inert gas is prepared. Not only is it necessary, but the equipment is complicated. In addition, the sealing mechanism disposed between the discharge device and the cooling device needs to be formed of a heat-resistant member because high-temperature pyrolysis residues pass therethrough, and thus has a problem that the cost increases.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is intended to heat and thermally decompose waste and to form a carbonized gas and mainly non-volatile components. A pyrolysis reactor having a discharge port for generating a pyrolysis residue comprising and discharging the carbonization gas and the pyrolysis residue, a cooling device for cooling the pyrolysis residue, and cooling by the cooling device. A waste treatment apparatus comprising: a separation device for separating the separated pyrolysis residue into a combustible component and a non-combustible component; and a combustor for burning the dry distillation gas and the combustible component. An object of the present invention is to provide a thermal decomposition residue treatment device in a waste treatment device provided with a supply device for directly introducing the thermal decomposition residue discharged from the reactor into the cooling device.

As a supply device for introducing the pyrolysis residue discharged from the pyrolysis reactor into the cooling device, the outlet of the pyrolysis reactor is opened in the cooling device, or the discharge port of the pyrolysis reactor is opened. And the inlet of the cooling device. Further, as the cooling device, a rotating cooling drum is suitable, and this cooling drum is configured as a double-layer jacket type, or cooling the outer periphery of the cooling drum by spraying cooling water from a nozzle, or The lower part of the cooling water tank is arranged to be submerged and cooled.

[0007] A sealing mechanism is arranged on the discharge side of the cooling device, and a low oxygen atmosphere at atmospheric pressure or lower is formed in the cooling device. In the pyrolysis residue treatment device in the waste treatment device configured as described above, the waste put in the pyrolysis reactor kept at atmospheric pressure or less is heated and pyrolyzed here, and the carbonization gas and A high-temperature pyrolysis residue mainly composed of nonvolatile components, for example, about 450 ° C. is generated, and the dry distillation gas and the pyrolysis residue are discharged from an outlet.

[0008] Then, the carbonization gas is separated during the transfer at the discharge port, and the pyrolysis residue is supplied to a cooling device maintained at a pressure lower than the atmospheric pressure by a supply device, and is heated to a predetermined temperature, for example, 80 ° C without fear of oxidation. It is cooled below, and the cooled pyrolysis residue is supplied to a downstream separator through a sealing mechanism, where it is separated into a combustible component and a non-combustible component.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a thermal decomposition residue treatment apparatus in a waste treatment apparatus according to the present invention will be described below with reference to FIGS. FIG. 1 is a system diagram of a waste treatment apparatus equipped with a pyrolysis residue treatment apparatus according to the present invention.
Is a pyrolysis reactor, which is preferably constituted by a horizontal rotary drum. The pyrolysis reactor 1 is connected in a sealed state to the input port 3 and the like by a sealing mechanism (not shown), and is disposed at the last stage of the exhaust gas system. The inside of the blower 2 is maintained in a low oxygen atmosphere below the atmospheric pressure. A waste a crushed to a predetermined size or less is supplied from the inlet 3 into the pyrolysis reactor 1 by a crusher (not shown).

[0010] and this wastes a are pyrolysis reactor from the air heater 5 disposed within the first flue 4, which is arranged after the 1 than the line L ₁ and the inlet channel 6a heating fluid inlet header 6b (FIG. 2), the heating air b supplied to a number of heat transfer tubes (not shown)
It is heated to 00 ° C., usually about 450 ° C., and thermally decomposes to produce a dry distillation gas G ₁ and a pyrolysis residue c mainly composed of nonvolatile components.

As shown in FIG. 2, the pyrolysis reactor 1 is provided with an outlet 8 which rotates integrally with the drum body 6 and has a spiral fin 7 on the inner surface. The discharge port 8 functions as a supply device to a subsequent device, and the distal end of the discharge port 8 protrudes into a cooling drum 9 serving as a cooling device and is opened. As shown in FIGS. 3 and 4, the front end A of the discharge port 8 has a spiral fin 7 on the inner surface, and a plurality of holes 10 are opened in a predetermined circumferential direction at a predetermined position. the outer peripheral portion is rotatably disposed in a fitted state in the hood 11 to separate carbonization gas G _1. A protection plate 10a is provided obliquely in the rotation direction of the discharge port 8 so that the pyrolysis residue c does not enter the hole 10 and block it. And hood 11 from this hole 10
Carbonization gas G ₁ that has flowed into the inside is designed to be supplied to the burner 13 of the melting furnace 12 is a combustor via line L _2.

The cooling drum 9 is cooled by cooling water sprayed from a nozzle 9a provided in a circumferential direction above the cooling drum 9. This cooling means is not limited to this method. For example, the cooling means may be cooled by flowing cooling water into a jacket formed around the cooling drum 9.
Further, the lower part of the cooling drum 9 may be cooled by immersing it in cooling water in a water tank. In this embodiment, the cooling drum 9 is of a rotary type. However, the cooling drum 9 may be a type that cools the pyrolysis residue c while slowly rotating it and transfers it to the end.

The pyrolysis residue c cooled in the cooling drum 9 and transferred to the end is discharged into a receiver 9b engaged with the end of the cooling drum 9. The sealing mechanism 14 provided at the outlet of the receiver 9b is alternately opened and closed to discharge the thermal decomposition residue c. By the action of the sealing mechanism 14, a low oxygen atmosphere at atmospheric pressure or lower is formed in the cooling drum 9, as in the pyrolysis reactor 1.

FIG. 5 shows another embodiment, in which the tip of a discharge port 8 which rotates integrally with the drum body 6 of the pyrolysis reactor 1 is arranged so as to open into a discharge device 15. Then, the carbonization gas G ₁ and the pyrolysis residue c are separated in the discharge device 15, and the pyrolysis residue c is supplied into the cooling drum 9 through the inlet 16 of the cooling drum 9 as a cooling device. You. That is, in this case, the discharge port 8 and the input port 16 are connected via the discharge device 15, and these function as a supply device.

FIG. 6 shows still another embodiment, in which the discharge port 8 is connected to the input port 16 via the discharge device 15, and these function as a supply device. The pyrolysis residue c supplied into the cooling drum 9 by the supply device configured as described above is cooled to a temperature at which there is no risk of ignition, for example, about 80 ° C.
Is supplied to a separating device 17 (FIG. 1), where it is separated into a combustible component d mainly composed of carbon and a non-combustible component e such as rubble such as metal, pottery, gravel, and concrete pieces. This non-combustible component e is collected in the container 18.

[0016] On the other hand, the combustible component d is supplied to the crusher 19 is crushed Here, for example, about 1 mm, the ground combustible component d 'is supplied to the burner 13 of the melting furnace 12 via line L ₃ , where it is combusted in a high temperature range of about 1,300 ° C. by the combustion air f supplied from the line L ₄ by the dry distillation gas G ₁ supplied forced draft fan 20 from the line L _2, combustion ash generated during this The ash contained in the combustible component is melted, flows down as molten slag g, and is cooled and solidified in the water tank 21. The cooled and solidified slag is effectively used as a building material or a pavement material.

The combustion gas G ₂ generated in the melting furnace 12 is
After being supplied to the air heater 5 and the waste heat boiler 22 through the first flue 4 and being recovered by heat, the dust is removed by the dust collecting device 24 through the second flue 23 and is cleaned by the gas cleaning device 25. become a clean exhaust gas G ₃ relatively cold is released from a chimney 26 into the atmosphere. Reference numeral 27 denotes a power generation device that generates power using steam s generated by the waste heat boiler 22.

[0018]

As is apparent from the above description, according to the thermal decomposition residue treatment apparatus in the waste treatment apparatus according to the present invention, the supply device for supplying the high-temperature pyrolysis residue generated in the thermal decomposition reactor is provided. After that, it is supplied directly to the cooling device for cooling processing, and is supplied to the separation device at atmospheric pressure via the sealing mechanism.Therefore, the supply of inert gas to the cooling device becomes unnecessary, and the sealing mechanism in the high-temperature part is eliminated. Since it can be eliminated, not only the cost can be reduced due to the simplification of the device and the need for inert gas, but also the sealing mechanism can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a system diagram of a waste treatment device equipped with a thermal decomposition residue treatment device of the present invention.

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

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

FIG. 4 is a view as seen in the direction of arrows D-D in FIG. 3;

FIG. 5 is an enlarged view of another embodiment of a portion B in FIG. 1;

FIG. 6 is an enlarged view of still another embodiment of a portion B in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Pyrolysis reactor 2 Induction blower 3,16 Input port 4 1st flue 5 Air heater 6 Drum main body 7 Spiral fin 8 Outlet 9 Cooling drum 10 Hole 11 Hood 12 Melting furnace 13 Burner 14 Seal mechanism 15 Discharge device 17 Separator 18 Container 19 Crusher 20 Push-in blower 21 Water tank 22 Waste heat boiler 23 Second flue 24 Dust collector 25 Gas cleaning device 26 Chimney 27 Power generation device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location F23J 1/00 F23J 1/00 C

Claims (5)

[Claims] 1. A heat generating apparatus which heats and thermally decomposes waste to produce a pyrolysis gas and a pyrolysis residue mainly composed of non-volatile components and has an outlet for discharging the pyrolysis gas and the pyrolysis residue. Cracking reactor, a cooling device for cooling the pyrolysis residue, a separation device for separating the pyrolysis residue cooled by the cooling device into a combustible component and a non-combustible component, In a waste treatment apparatus comprising a combustor for combusting a combustible component, a supply device for directly introducing a pyrolysis residue discharged from the pyrolysis reactor into the cooling device is provided. Pyrolysis residue treatment equipment in waste treatment equipment. 2. The cooling device according to claim 1, wherein a sealing mechanism is provided on a discharge side of the cooled pyrolysis residue. 3. The supply device according to claim 1, wherein an outlet of the pyrolysis reactor is configured to be opened in the cooling device. 4. The supply device according to claim 1, wherein an outlet of the thermal decomposition reactor and an inlet of the cooling device are connected. 5. The cooling device according to claim 1, wherein the cooling device comprises a cooling drum whose inside is maintained at atmospheric pressure.