JPH1061925A - Thermal decomposition residue separation equipment in waste treatment equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent separation efficiency from being lowered owing to clogging of a second separator by separating cotton-like substances with a finger sieve first separator, and separating relatively large particles with a second separator composed of a sieve selector. SOLUTION: A first separator 12 is constructed with a finger sieve separator, and from a thermal decomposition residue (c) supplied onto the first separator 12 there is separated and removed a linear first nonflammable component e1 such as a wire and a chain. The thermally decomposed residue (c') from which the first nonflammable component e1 is removed is supplied to a second separator 13. The second separator 13 is constituted of a sieve selector having the mesh of 10 to 30mm preferably 15 to 25mm, with which separator 13 the residue is separated to acecond nonflammable component e2 comprising relatively large particles and a flammable component (d) comprising small particles. Hereby, separation efficiency is prevented from being lowered owing to clogging of the second separator 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for separating pyrolysis residues in a waste treatment apparatus, and more particularly, to thermally decompose waste by heating it in a low-oxygen atmosphere at atmospheric pressure or lower, and to form a non-volatile gas mainly with a dry distillation gas. And a pyrolysis residue comprising a flammable component, separating the pyrolysis residue into a flammable component and a non-flammable component, and burning the flammable component and the dry distillation gas. The present invention relates to a thermal decomposition residue separation device in a processing device.

[0002]

2. Description of the Related Art As one of processing devices for industrial waste including municipal waste and combustibles such as waste plastics, waste is put into a pyrolysis reactor in a low oxygen atmosphere below atmospheric pressure. Heat to thermally decompose to produce a pyrolysis gas and a pyrolysis residue mainly composed of non-volatile components. After cooling the pyrolysis residue, supply it to a separator to supply a combustible component mainly composed of carbon. And flammable components such as metals and pottery, gravel, concrete pieces, etc., and crush the flammable components, and melt the crushed flammable components and the carbonized gas in a combustor. Waste treatment in which the molten slag and the ash contained in the combustible components are converted into molten slag, and the molten slag is discharged and solidified by cooling. Equipment is known

[0003] In such a waste disposal apparatus, a sieve is used as a separation apparatus for separating a pyrolysis residue into a combustible component and a non-combustible component (for example, Japanese Patent Application Laid-Open No. 64-49816).

[0004]

Meanwhile, in the pyrolysis residue separation device in the waste treatment device, the pyrolysis residue discharged from the discharge device is cooled by a cooling device and then directly supplied to a sieve sorter. Therefore, there is a problem that clogging occurs in the sieving and sorting machine and the separation efficiency is reduced.

That is, according to the knowledge of the present inventor, the properties of the pyrolysis residue in such a waste disposal apparatus may vary slightly depending on the nature of the garbage, but may have the ratio shown in Table 1 below. understood.

[0006]

[Table 1]

[0007] The pyrolysis residue contains linear non-combustible components such as wires and chains. When the non-combustible components are supplied to a sieving and sorting machine, they are caught by meshes and stay.
Due to this clogging, the separation efficiency is reduced.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems.
A pyrolysis reactor that heats and thermally decomposes waste to generate a carbonization gas and a pyrolysis residue mainly composed of non-volatile components; and the carbonization gas and the pyrolysis residue discharged from the pyrolysis reactor. And a separation device that cools the pyrolysis residue discharged from the discharge device and then separates the combustible component and the non-combustible component, and a crusher that pulverizes the combustible component. A waste treatment device comprising a combustor for burning the carbonized gas and the pulverized combustible component, wherein the separation device separates at least a linear substance.
And a second separator for separating relatively large particles, the apparatus for separating pyrolysis residues in a waste treatment apparatus.

[0009] Preferably, a finger sheave type separator is used as the first separator to efficiently remove linear objects such as iron bars, wires and chains. The second separator has a mesh of 10 to 30 mm, preferably 15 to 30 mm.
The granules are classified into a plurality of pieces using a sieve sorter composed of 〜25 mm. Further, a pyrolysis residue comprising relatively large particles separated by the second separator is supplied to a wind separator to be separated into a combustible component and a non-combustible component.

According to the pyrolysis residue separation device in such a waste disposal apparatus, the pyrolysis residue discharged from the discharge device is cooled and then supplied to the first separator, where the wire and the pyrolysis residue are separated. Linear non-combustible components such as chains are separated and removed. Then, the pyrolysis residue from which such linear first non-combustible components have been removed is led to a second separator, a sieve sorter, where the pyrolysis residue consisting of relatively large particles and It is separated into pyrolysis residues consisting of particles.

The pyrolysis residue composed of relatively large particles is a second non-combustible component mainly composed of metal or rubble, and this second non-combustible component is guided to a wind separator as required. The combustible components partially mixed are separated and recovered.
On the other hand, the pyrolysis residue composed of small particles is a combustible component mainly composed of carbon, and ash and a third non-combustible component having a small particle size are partially mixed therein. Then, the pyrolysis residue consisting of such small particles is supplied to the downstream pulverizer on the assumption that it is a combustible component.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a thermal decomposition residue separating 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. Reference numeral 1 denotes a pyrolysis reactor composed of, for example, a horizontal rotary drum. Waste a which has been crushed to a certain degree is charged.

[0013] The pyrolysis reactor 1, heated air b which has been heated by the air heater 3 is supplied from the line L ₁ to 300 ° C. to 600 ° C., with typically is heated to about 450 ° C., its The inside is maintained in a low oxygen atmosphere at atmospheric pressure or lower by a sealing mechanism (not shown) and an induced blower 4 arranged at the final stage of the exhaust gas treatment. Such pyrolysis reactor 1 waste supplied into a, where it is heated by thermal decomposition, and carbonization gas G ₁ and the pyrolysis residue c is generated, the carbonization gas G ₁ and pyrolysis The residue c is separated in the discharge device 5 and the carbonized gas G ₁ is supplied to the line L
Through ₂ , it is supplied to a burner 7 of a melting furnace 6 which is a combustor.

On the other hand, the pyrolysis residue c is cooled by the cooling device 8 to a temperature at which the oxidation reaction is not likely to occur, for example, about 80 ° C., and supplied to the separation device 9, where the first linear non-combustible component e _{1 is produced.} When relatively large and a second non-combustible components e ₂ consisting of particles is separated into a combustible component d, the first non-combustible components e ₁ is the container 10, and the second non-combustible components e
₂ are collected in the container 11 respectively.

More specifically, as shown in FIG. 2, the separating device 9 includes at least a first separator 12, a second separator 13, and a wind separator 14 provided as necessary. Is done. That is, the first separator 12 is constituted by, for example, a finger sheave type separator. The first separator 12 pyrolysis residue c supplied onto here first unburned component e ₁ linear, such as at least wire and chains are separated and removed.

The pyrolysis residue c ′ from which the _first non-combustible component e ₁ has been removed is supplied to a second separator 13.
The second separator 13 has a mesh of, for example, 10 to 30 m.
m, preferably consists of a sieving sorter 15 to 25 mm, the second unburned components e ₂ composed of relatively large particles This separator 13 and the combustion component d composed of small particles Separated.

The second non-combustible component e ₂ is supplied to the wind separator 14
Flammable components such as carbon adhering to metals and rubble, and flammable components d 'present in relatively large particles.
Is separated and recovered, and the recovered combustible component d '
Is mixed with the combustible component d passed through the separator 13. The combustible component d and d 'is supplied to the crusher 15, for example, ground to 1mm approximately less fines, burners 7 of the melting furnace 6 The ground combustible component d "is via a line L ₃
Supplied to

[0018] Then the combustion treatment in a high temperature range of about 1,300 ° C. by the combustion air f supplied from the line L ₄ by carbonization gas G ₁ and the forced draft fan 16 which is supplied from the line L _2, resulting in this case The ash and the like mixed in the combustible ash and the combustible component d ″ are melted, discharged as molten slag g, and cooled and solidified in the water tank 17. The cooled and solidified slag is used for pavement materials and building materials. It is effectively used as

The combustion gas G ₂ generated in the melting furnace 6 is heat-recovered by an air heater 3 and a waste heat boiler 18 via a line L ₅ , and then is removed by a dust collector 19 and is cleaned by a gas cleaning device 20. washed with most relatively a low temperature clean exhaust gas G ₃ of is released from the chimney 21 into the atmosphere. And in part supplied as inert gas through line L ₆ to the cooling unit 8. 22 is waste heat boiler 1
8 is a power generation device that generates power by the steam S generated by the power generation device 8.

Of course, the present invention is not limited to the above-described embodiment. For example, the second non-combustible component e ₂ separated by the second separator 13 may be replaced by a magnetic separator, an aluminum separator, or the like, if necessary. , And may be separated and collected into iron, non-ferrous metallic components, rubble, and the like.

[0021]

As is clear from the above description, according to the pyrolysis residue separation apparatus in the waste treatment apparatus according to the present invention, after the pyrolysis residue discharged from the discharger is cooled, the first residue is cooled. Feed to a separator, at least a linear first
After separating and removing the non-combustible component of the above, it is supplied to a second separator composed of a sieve sorter, and the second non-combustible component which is relatively large particles, and the flammability comprising small particles Separation into components can provide an effect of preventing a decrease in separation efficiency due to clogging of the second separator.

[Brief description of the drawings]

FIG. 1 is a system diagram of a waste treatment apparatus having a pyrolysis residue separation apparatus according to the present invention.

FIG. 2 is a schematic side view of a pyrolysis residue separation device according to the present invention.

[Description of Signs] 1 Pyrolysis reactor 2 Input device 3 Air heater 4 Induced blower 5 Discharge device 6 Melting furnace 7 Burner 8 Cooling device 9 Separation device 10, 11 Container 12 First separator 13 Second separator 14 Wind Selector 15 Crusher 16 Push Blower 17 Water Tank 18 Waste Heat Boiler 19 Dust Collector 20 Gas Washing Device 21 Chimney 22 Power Generator

Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display F23G 5/14 ZAB F23G 5/16 ZABE 5/16 ZAB B09B 3/00 302F

Claims (5)

[Claims] 1. A pyrolysis reactor that heats and thermally decomposes waste to produce a carbonization gas and a pyrolysis residue mainly composed of non-volatile components, and the carbonization gas discharged from the thermal decomposition reactor. A discharge device that separates the pyrolytic residue from the pyrolytic residue, a separating device that separates the pyrolytic residue discharged from the discharge device into a combustible component and a non-combustible component, In a waste treatment apparatus comprising a pulverizer for pulverizing and a combustor for combusting the carbonized gas and the pulverized combustible component, a first separator for separating the linear device from at least the separation device, An apparatus for separating pyrolysis residues in a waste treatment apparatus comprising a second separator for separating relatively large particles. 2. The apparatus according to claim 1, wherein the first separator comprises a finger sheave type separator. 3. The method according to claim 1, further comprising a sieve sorter.
Separator. 4. The second separator according to claim 3, wherein the mesh of the sieve sorter is configured to be 10 to 30 mm, preferably 15 to 25 mm. 5. A pyrolysis residue comprising relatively large particles separated by the second separator is supplied to a wind separator to separate it into a combustible component and a non-combustible component. 1
An apparatus for separating pyrolysis residues in a waste treatment apparatus according to Claim 1.