JPH09292111A - Thermal decomposing reactor for waste treatment equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent fiber form objects in waste from growing to a lump shape objects and to prevent the deterioration of the thermally decomposing efficiency of equipment by arranging heat exchanger tubes, inside of which shell heating fluid is flown, in a thermally decomposing reactor and arranging a heat resistant bar shape body movably between the heat exchanger tubes and the thermally decomposing reactor. SOLUTION: Waste a such as municipal waste is supplied to a thermally decomposing reactor 1 by a feeding device 6. Thermally decomposed product comprises dry distilled gas G1 and thermally decomposed residue e, the dry distilled gas G1 and the residue E are separated by a discharging device 7 and the dry distilled gas G1 is supplied to the burner 16 of a melting furnace 15 through a line L1. When such as cloths are included in the waste a that is thrown into the thermally decomposing reactor 1, these are generally tangled each other but heat resistant bar shape bodies 14 rotate and drop together with the fiber objects and prevent the formation and growth of the lump shape objects. The heat resistant bar shape bodies 14 are preferred to be 3000 to 4500mm in length and 150 to 250mm in diameter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pyrolysis reactor in a waste treatment apparatus, and more particularly, to heat and decompose the waste under atmospheric pressure to produce a dry distillation gas and a pyrolysis residue, The present invention relates to a pyrolysis reactor in a waste treatment device in which the dry distillation gas and a combustion component separated from a pyrolysis residue are supplied to a combustor for combustion treatment.

[0002]

2. Description of the Related Art Waste is put into a thermal decomposition reactor as one of industrial waste treatment devices containing general waste such as municipal waste and combustibles such as waste plastic, and heated under atmospheric pressure (low oxygen atmosphere). And pyrolyzed to produce a dry distillation gas and a pyrolysis residue mainly composed of non-volatile components, and after further cooling the pyrolysis residue, the pyrolysis residue is supplied to a separation device to form a combustible component mainly containing carbon. , For example, it is separated into non-combustible components made of rubble such as metal, pottery, gravel, concrete pieces, etc., and the combustion components are crushed, and the pulverized combustion components and the above-mentioned carbonization gas are introduced into a melting furnace which is a combustor. Combustion treatment in this melting furnace, the resulting combustion ash is made into molten slag,
A waste treatment device is known in which the molten slag is discharged to be cooled and solidified (for example, Japanese Patent Laid-Open No. 1-498).
No. 16).

[0003]

However, in the waste treatment apparatus as described above, the thermal decomposition reactor usually uses a horizontal rotary drum in which a plurality of heat transfer tubes are arranged along the inner wall of the shell. The waste put into the decomposition reactor is heated by the rotation of the rotating drum while being heated and pyrolyzed, but if linear substances are mixed in this waste, they will entangle and grow into lumps. To do. When the agglomerates are formed in this manner, there is a problem that the heat conduction due to stirring deteriorates and, as a result, the thermal decomposition efficiency decreases.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and is directed to a thermal decomposition reactor in which waste is kept under atmospheric pressure. , The waste is heated and pyrolyzed to produce a pyrolysis product consisting of a dry distillation gas and a pyrolysis residue mainly composed of a non-volatile component, and the pyrolysis residue is converted into a combustible component and an incombustible component. In a waste treatment device which is separated and is configured to supply the dry distillation gas and the combustible component to a combustor for combustion treatment, a heat transfer tube for passing a heating fluid through the pyrolysis reactor is arranged in the shell. In the shell,
Further, the present invention provides a thermal decomposition reactor in a waste treatment device in which a heat-resistant rod-shaped body is movably arranged between the heat transfer tube and the heat transfer tube.

The heat-resistant rod-shaped body is preferably a metal rod-shaped body having a length L of 3000-4500.
mm, the diameter R is selected from 150 to 250 mm, and at least two metal rods are arranged so as to move in a predetermined space. In the thermal decomposition reactor of the waste treatment device having the above-described structure, the waste introduced into the thermal decomposition reactor is dried and heated from the input side toward the discharge side while being stirred by the rotation of the thermal decomposition reactor, and thermally decomposed. While moving.

[0006] When the waste contains a linear object such as a cloth or cloth, the linear object is agitated and separated by the heat-resistant rod-like material to prevent mutual entanglement. As a result, it does not form as a lump, so that the stirring is sufficiently performed.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a thermal decomposition reactor in a waste treatment apparatus according to the present invention will be described below with reference to FIGS. 1 to 3. Reference numeral 1 denotes a horizontal drum type thermal decomposition reactor. The thermal decomposition reactor 1 includes a heat transfer tube 2a arranged along an inner wall and a heat transfer tube 2b which also serves to scrape up a waste a which will be described later and a supporting plate 3 Ciel 4 attached by and waste a
A supply device 6 having a charging port 5, a discharge part 8 for transferring the thermal decomposition product b to a discharge device 7, a heated air supply port 9,
It is composed of the heated air outlet 10. Reference numeral 11 is a screw feeder that constitutes the charging device 6.

The shell 4 is configured to rotate by actuating the driving device 12, and a plurality of support plates 3 are arranged at a predetermined interval L therein,
Partitions 13a to 13d are formed by the respective support plates 3. In particular, 14 shown in FIG. 2 is a movable heat-resistant rod-shaped body, particularly a metal rod-shaped body, and this heat-resistant rod-shaped body 14 is preferably formed of a metal pipe having corrosion resistance, and its length is The support plates 3 are inserted and arranged within the space L, that is, at least two in each of the sections 13a to 13d.

The distance L is 2000 when the diameter of the shell 4 is 2000.
~ 3500 mm, usually 4000-6000 mm
The heat-resistant rod-shaped body 14 has a length of 3000 to
A diameter of 4500 mm and a diameter of 150 to 250 mm is used. The thermal decomposition reactor 1 configured as described above is incorporated in a waste treatment device as shown in FIG. 3, and in FIG. 3, waste a containing combustible substances such as municipal waste is included.
Is supplied to the pyrolysis reactor 1 by the charging device 6, and heated air d heated by an air heater (not shown) arranged on the downstream side of the melting furnace 15 which is a combustor is heated from the line L _1. It is supplied to the decomposition reactor 1, where the waste a is 300 ° C.
It is heated to ˜600 ° C., usually at a high temperature of about 450 ° C., and is thermally decomposed to be a thermal decomposition product b and supplied to the discharge device 7.

That is, the thermal decomposition product b is composed of the dry distillation gas G ₁ and the thermal decomposition residue e. The dry distillation gas G ₁ and the thermal decomposition residue e are separated by the discharge device 7, and the dry distillation gas G ₁ is separated. Is supplied to the burner 16 of the melting furnace 15 through the line L ₂ . On the other hand, the thermal decomposition residue e is cooled by a cooling device 17 to a temperature at which there is no risk of ignition, for example, about 80 ° C., and then supplied to a separating device 18, where flammable components f such as carbon and non-combustible components such as metals and pottery are separated. The combustible component g is separated, the non-combustible component g is collected in the container 19, and the combustible component f is supplied to the pulverizer 20. Here, the combustible component g is pulverized into fine powder of, for example, 1 mm or less, and pulverized. The combustible component f ′ is supplied to the burner 16 via the line L ₃ .

The combustible component f'is burnt at a high temperature of about 1,300 ° C. in the melting furnace 15 by the above-mentioned dry distillation gas G ₁ and the combustion air h supplied from the line L ₄ by the blower 21. The combustion ash generated at that time becomes molten slag k and falls into the water tank 22 to be cooled and solidified. The combustion gas G ₂ of the melting furnace 15 is recovered from the line L ₅ by an air heater and a waste heat boiler 23, which are not shown, and is dust-removed by the dust collectors 24a and 24b. It becomes ₃ and most of it is discharged from the chimney 25 to the atmosphere. Then, a part of the exhaust gas G ₃ is supplied to the cooling device 17 through the line L ₆ and the pyrolysis residue e
To cool. It should be noted that with this exhaust gas G ₃ alone, the cooling device 1
When the cooling capacity of 7 is insufficient, cooling with cooling water is also used.

Reference numeral 26 denotes an induced air blower, and the induced air blower 26 keeps the inside of the thermal decomposition reactor 1, the melting furnace 15, etc. at atmospheric pressure (negative pressure) by the induced air blow action of the induced air blower 26. Further, 27 is a power generator that generates electric power by the steam S generated in the waste heat boiler 23. In the thermal decomposition reactor in such waste treatment equipment,
For example, when the waste a put into the thermal decomposition reactor 1 contains linear objects such as lines and cloths, the linear objects are entangled with each other. Since the body 14 repeatedly rotates and drops at the same time as this linear object, the mutual entanglement can be prevented and therefore the formation and growth of the lumps can be prevented.

This heat-resistant rod-shaped body 14 is used for each support plate 3
Since the thermal decomposition reactor 1 is arranged with its movement restricted, the thermal decomposition reactor 1 does not move in the axial direction. The heat-resistant rod-shaped body 14 referred to in the present invention is a member that moves and agitates with the waste a in the shell 4 of the thermal decomposition reactor 1 and moves in a radial direction within a predetermined compartment. Therefore, a metal rod-shaped body is suitable, but any other heat-resistant and corrosion-resistant material can be used.

[0014]

As is apparent from the above description, according to the thermal decomposition reactor in the waste treatment apparatus according to the present invention,
By a simple means of inserting and arranging a heat-resistant rod-shaped body such as a metal rod-shaped body in the thermal decomposition reactor so that it can be moved in the radial direction, the entanglement of linear substances existing in the waste is prevented. There is no effect that lumps are formed or grown, and as a result, it is possible to prevent a decrease in the thermal decomposition efficiency of the waste treatment device. Further, a crushing effect of dust, incombustibles, carbon, etc. can be expected.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a thermal decomposition reactor.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a system diagram of a waste treatment device incorporating a pyrolysis reactor according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Pyrolysis reactor 2a, 2b Heat transfer tube 3 Support plate 4 Shell 5 Inlet 6 Input device 7 Ejection device 8 Ejection port 9 Heating air supply port 10 Heating air exhaust port 11 Screw feeder 12 Drive device 13a-13d Partition 14 Metal rod shape Body 15 Melting furnace 16 Burner 17 Cooling device 18 Separation device 19 Container 20 Crusher 21 Blower 22 Water tank 24a, 24b Dust collector 25 Chimney 26 Induction blower 27 Power generator

Claims (2)

[Claims] 1. A waste is charged into a pyrolysis reactor whose inside is kept under atmospheric pressure, and the waste is heated and pyrolyzed to produce a dry distillation gas and a pyrolysis residue mainly composed of non-volatile components. Waste treatment apparatus for producing a thermal decomposition product of the above, separating the thermal decomposition residue into a combustion component and a non-combustion component, and supplying the carbonized gas and the combustion component to a combustor for combustion. In the thermal decomposition reactor, a heat transfer tube for passing a heating fluid is arranged in a shell, and a heat-resistant rod-shaped body is movably arranged in the shell and between the heat transfer tube and the heat transfer tube. Pyrolysis reactor in waste treatment equipment. 2. The length is 3000 to 4500 mm and the diameter is 1.
The thermal decomposition reactor in the waste treatment device according to claim 1, wherein at least two unit metallic rods having a size of 50 to 250 mm are arranged.