JPH1073231A - Discharge device for thermal decomposition reactor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly and reliably remove a large unburnt substance in a thermal decomposition residue produced in a thermal decomposition reactor. SOLUTION: A discharge device 2 for a thermal decomposition reactor is arranged on the outlet side 22 of a thermal decomposition reactor 17 and separates thermal decomposition gas G1 generated in the thermal decomposition reactor 17 and a thermal decomposition residue (b) for discharge. In this case, the discharge device comprises an apron conveyor 3 to receive and convey the thermal decomposition residue (b); and an opening part 6 arranged on one end side of the apron conveyor 3 and having a given size enough for the passage of the thermal decomposition residue (b). When the opening part 6 is choked with a large unburnt substance (h) in the thermal decomposition residue (b), the choking is detected and the apron conveyor 3 is reversed to discharge the large unburnt substance (h) through a different outlet 10 and thereafter, the apron conveyor 3 is conveyed forward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the input waste (general waste such as municipal waste from homes and offices, waste plastic, car shredder dust, waste office equipment, electronic equipment, chemical products, etc.) Industrial waste, etc.
The present invention relates to a discharge device provided on the outlet side of a pyrolysis reactor for pyrolyzing (including combustible materials) and a waste treatment device having the same.

[0002]

2. Description of the Related Art As a discharge device of a pyrolysis reactor for treating general waste such as municipal solid waste and combustible materials such as waste plastics, a waste is put into a pyrolysis reactor and placed in a low oxygen atmosphere. To generate a pyrolysis gas and a pyrolysis residue mainly composed of non-volatile components, and separate the pyrolysis gas and the pyrolysis residue by a discharge device provided at the outlet side of the pyrolysis reactor. It is known that pyrolysis gas is discharged from an upper portion and pyrolysis residue is discharged from a lower portion. (Japanese Patent Publication No. 6-56253).

[0003]

However, wastes are various and various, for example, garbage, papers, waste plastics, car shredders and the like from homes and offices.
There are combustible materials such as dust, and incombustible materials such as metals, pottery, gravel, concrete pieces, etc., from waste office equipment, electronic equipment, construction materials, etc. The pyrolysis residue produced by
Large noncombustible substances mainly composed of noncombustible components may be contained. When the pyrolysis residue containing this large incombustible material is supplied to a downstream cooling device, separation device or combustion melting furnace, etc.
A lot of cooling heat is required in the cooling device, and the processing takes a long time, and the processing efficiency may be deteriorated. In addition, since large incombustibles may be caught by downstream equipment, it is desirable to remove large incombustibles in pyrolysis residues as quickly as possible.

[0004] It is an object of the present invention to quickly remove large incombustibles in a pyrolysis residue generated in a thermal cracking reactor to avoid trouble (operational trouble) of a downstream device due to the large incombustibles. An object of the present invention is to provide a thermal decomposition reactor discharge device and a waste treatment device having the same, which improve the processing efficiency of each device.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an outlet of a pyrolysis reactor for pyrolyzing input waste into a pyrolysis gas and a pyrolysis residue mainly composed of nonvolatile components. A pyrolysis reactor provided on the side of the pyrolysis reactor for separating and discharging a pyrolysis gas and a pyrolysis residue generated in the pyrolysis reactor, wherein the pyrolysis residue sent from the pyrolysis reactor is A conveyor provided for receiving and transporting an object, and an opening provided at one end of the conveyor and having a predetermined size for allowing the pyrolysis residue to pass therethrough, and clogging the opening of the pyrolysis residue. When a large incombustible material having a size is clogged in the opening, the clogging is detected, the conveyor is reversed, the large incombustible material is discharged from another outlet, and then the conveyor is rotated forward. It is.

[0006] The pyrolysis residue sent from the pyrolysis reactor is received on a conveyor and conveyed to one end of the conveyor. Since one end side of the conveyor is provided with an opening of a predetermined size, most of the pyrolysis residue passes through this opening, but large large incombustibles in the pyrolysis residue are:
Clogging in the opening. At this time, the jam is detected, and at the same time, the large incombustibles in the pyrolysis residue are removed by reversing the conveyor and discharging the large incombustibles from another outlet. Send the pyrolysis residue free of waste to downstream equipment.
By doing so, it is possible to avoid trouble (operational trouble) of the downstream device due to large incombustibles, and to perform efficient processing of each device.

A pyrolysis reactor is provided at an outlet side of a pyrolysis reactor for pyrolyzing the inputted waste into a pyrolysis gas and a pyrolysis residue mainly composed of a nonvolatile component. In a discharge device of a pyrolysis reactor for separating and discharging a cracked gas and a pyrolysis residue, a conveyor for receiving and transporting the pyrolysis residue sent from the pyrolysis reactor, and one end of the conveyor Provided with an opening having a predetermined size through which the pyrolysis residue passes, and when a large incombustible substance having a size that blocks the opening out of the pyrolysis residue is clogged in the opening. , Detecting the clogging,
One end of the conveyor goes down to expand the opening, discharge the large incombustibles from another outlet provided near the one end, and then raise the conveyor to its original position to discharge the pyrolysis residue That is to make it.

[0008] As in the discharge device described above, the pyrolysis residue sent from the pyrolysis reactor is received on a conveyor and conveyed to one end of the conveyor. Since one end of the conveyor is provided with an opening of a predetermined size, most of the pyrolysis residue passes through this opening, but a large large incombustible substance in the pyrolysis residue has an opening. Will be clogged. At this time, a large incombustible material passes through the opening by detecting the jam and lowering one end of the conveyor to widen the opening. At this time, the large incombustibles in the pyrolysis residue are removed by discharging the large incombustibles from another outlet provided near the one end side. Thereafter, the conveyor is raised to its original position, and the pyrolysis residue without large incombustibles is sent to downstream equipment. In this manner, similarly to the discharge device described above, it is possible to avoid trouble (operational trouble) of the downstream device due to a large incombustible substance and to perform efficient processing of each device.

Further, a pyrolysis reactor for pyrolyzing the input waste to generate a pyrolysis gas and a pyrolysis residue mainly composed of a non-volatile component, and a pyrolysis reactor generated by the pyrolysis reactor A discharge device for separating and discharging a gas and a pyrolysis residue, a separation device for separating the pyrolysis residue discharged from the discharge device into a combustible component and a non-combustible component, and the pyrolysis gas And a combustion melting furnace for transferring and combusting the combustible component and melting the generated ash, wherein the discharge device is the discharge device of the pyrolysis reactor according to any of the above.

[0010] The waste treatment apparatus, wherein the discharge apparatus is the discharge apparatus for the pyrolysis reactor according to any of the above, improves the treatment efficiency.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a discharge device for a pyrolysis reactor and a waste treatment device having the same according to the present invention will be described with reference to the drawings. Note that in FIGS. 1 to 3 below, the same structures and working parts are denoted by the same reference numerals.

FIG. 3 is a system diagram showing one embodiment of a waste treatment apparatus having a discharge device for a pyrolysis reactor according to the present invention. In the waste treatment apparatus 1 of the present embodiment,
The waste a such as municipal solid waste is crushed into 150 mm square or less by a crusher of, for example, a biaxial shearing type, and is input into the input unit 18 by a conveyor or the like. The waste a charged into the charging section 18 is supplied to the pyrolysis reactor 17 via the screw feeder 19. Waste a is in the pyrolysis reactor 17 is heated by a heat exchanger (not shown) disposed on the downstream of the combustion melting furnace 30 for melting to burn pyrolysis residue such as via a heated air line L ₁ Is heated to 300 to 600 ° C., usually about 450 ° C. by the heated air g (heat medium) supplied. The inside of the thermal decomposition reactor 17 is maintained at a pressure lower than the atmospheric pressure and is controlled to a low oxygen atmosphere.

Further, the waste a heated by the heated air g is thermally decomposed into a pyrolysis gas G ₁ and a pyrolysis residue b mainly composed of a non-volatile component. Separated. The pyrolysis gas G ₁ separated by the discharge device 2 is supplied from above the discharge device 2 to the burner 31 of the combustion melting furnace 30 via the pyrolysis gas line L ₂ . Since the pyrolysis residue b discharged from the lower part of the discharge device 2 has a relatively high temperature of about 450 ° C.,
Cool to a degree.

Further, the pyrolysis residue b is, for example, a magnetic separation type,
It is supplied to a known single or combined separation device 26 such as an eddy current type, a centrifugal type or a wind separation type, where it is separated into a combustible component c (including ash) and a non-combustible component d,
The non-combustible component d is collected in the container 27 and reused. The combustible component c is, for example, 1 mm
In the following, it is pulverized and supplied to the burner 31 of the combustion melting furnace 30 through the combustible component line L ₃ ,
_The combustion ash generated at this time is burned at a high temperature of about 1,300 ° C. together with the pyrolysis gas G ₁ supplied from 2 and the combustion air e supplied from the combustion air line L ₄ by the forced air blower 32. The slag f
0, and further flows down the inner wall to the bottom outlet 33.
From the water tank 34 to be cooled and solidified.

High temperature exhaust gas G generated in the combustion melting furnace 30
₂ is dust in the heat recovered precipitator 41 at the exhaust gas boiler 38 via a flue gas line L ₅ through the hot air heater 36, after the harmful components are removed further in the exhaust gas purifier 42, a low temperature clean exhaust gas G ₃ and made to attract blower 4
3 and is discharged from the chimney 44 to the atmosphere. Some of the cold clean gas G ₃ are, is returned to the cooler 25 through the exhaust gas circulation line L _6. The steam generated by the exhaust gas boiler 38 is used for power generation by a generator 39 having a steam turbine.

FIG. 1 is a longitudinal sectional view showing one embodiment of a discharge device of a pyrolysis reactor provided in the waste treatment apparatus 1. The discharge device 2 of the present embodiment is provided on the outlet side 22 of the pyrolysis reactor 17,
, For example, an apron conveyor 3 and an opening 6 provided on one end 4 of the apron conveyor 3 and having a predetermined size for allowing the pyrolysis residue b to pass therethrough. And The size of the opening 6 is appropriately determined depending on the amount of the pyrolysis residue b to be treated in the pyrolysis reactor.
mm. The apron conveyor 3 rotates in the direction of arrow 8 to convey the pyrolysis residue b sent from the outlet 21 of the pyrolysis reactor, and a plurality of strip-shaped plates are fixed between a pair of chains. It is an endless type.
The apron conveyor 3 is formed of heat-resistant steel containing Cr, Mo, etc., because the pyrolysis residue b from the pyrolysis reactor 17 is sent at a relatively high temperature of about 450 ° C. Is cooled with water as needed.

Further, when a large incombustible material h of a size that clogs the opening 6 of the pyrolysis residue b is clogged in the opening 6, the discharging device 2 increases the driving torque of the apron conveyor 3 Is detected by a torque limiter, the apron conveyor 3 is reversed, and the large incombustible substance h is discharged from another outlet 10 formed at the other end 9 of the apron conveyor 3.

The other outlet 10 is provided with a rotary lid 11 that rotates about a support shaft 11a, and opens as shown by a two-dot broken line to open and discharge a large incombustible substance h. Large incombustibles h
A water tank 13 via a discharge pipe 12 connected to another outlet 10
Fall into. Another outlet 10 has a discharge pipe 12 and a water tank 13
Sealed by water. The rotating lid 11 is provided with a water tank 13.
It also serves to prevent vapor from coming into the discharge device 2.

As described above, after discharging the large incombustibles h, the apron conveyor 3 is rotated in the forward direction of the arrow 8 to transfer the pyrolysis residue b to the downstream equipment through the discharge pipe 7. send. By doing so, it is possible to avoid trouble (operational trouble) of the downstream device due to large incombustibles, and to perform efficient processing of each device.

FIG. 2 is a longitudinal sectional view showing another embodiment of the discharge device similar to FIG. The discharge device 2 of the present embodiment includes the apron conveyor 3 and the opening 6 similarly to the discharge device of FIG. 1, and a large incombustible substance h of a size that clogs the opening 6 among the pyrolysis residues b. When the opening 6 is clogged, the clogging is detected by a torque limiter as an increase in the driving torque of the apron conveyor 3. Further, when the clogging of the large incombustibles h is detected by the increase of the driving torque, the one end side 4 of the apron conveyor 3 is lowered from the position 5 (the original position) to the lowered position 5a. At this time, it is preferable that the apron conveyor 3 is reversely rotated for a short period of time just before lowering the one end 4 of the apron conveyor 3 to release the bite of the large incombustible material h into the opening, and then to perform normal rotation.

By doing so, the large incombustible material h is separated from the opening 6, and the opening 6 expands from the height 6a to the height 6b, so that the large incombustible material h easily passes through the opening 6. . At this time, the large incombustibles h are discharged from another outlet 10 provided in the vicinity of the one end 4.
Is provided with a flow path switching plate 14 that rotates about a support shaft 14a as shown by a two-dot broken line. The large non-combustible material h falls from one end 4a of the apron conveyor 3 onto the flow path switching plate 14 shown by a two-dot chain line, is guided, and is discharged from another outlet 10 through the discharge pipe 12.

After the large incombustibles h have been discharged, the apron conveyor 3 is raised to the original position 5 and the apron conveyor 3 is further rotated in the direction of arrow 8 to remove the pyrolysis residue b. Through the discharge pipe 7 to a downstream device. In this way, similarly to the discharge device of FIG. 1, a trouble (operational trouble) of the downstream device due to a large incombustible substance is avoided, and
Efficient processing of each device can be performed. By lowering the apron conveyor 3 by a small distance, the discharge device 2 of the present embodiment can increase the height of the opening 6 and discharge the large incombustible material h easily and reliably.

Incidentally, the waste treatment apparatus shown in FIG. 3 is provided with the discharge device 2 of any of the above-mentioned pyrolysis reactors, so that the treatment efficiency is improved.

[0024]

According to the discharge device for a pyrolysis reactor of the present invention, large-sized incombustibles in the pyrolysis residue generated in the pyrolysis reactor can be quickly removed, and at the same time, treatment of downstream equipment Improve efficiency.

Further, according to the waste treatment apparatus of the present invention, the treatment efficiency is improved by providing the discharge device of the thermal decomposition reactor.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a discharge device for a pyrolysis reactor according to the present invention.

FIG. 2 is a longitudinal sectional view showing another embodiment similar to FIG.

FIG. 3 is a system diagram showing one embodiment of a waste disposal apparatus according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Waste treatment apparatus 2 Discharge apparatus 3 Apron conveyor (conveyor) 4 One end side 5 Original position 6 Opening 10 Separate outlet 17 Pyrolysis reactor 22 Outlet side 26 Separation apparatus 30 Combustion melting furnace G ₁ Pyrolysis gas a Disposal Material b Pyrolysis residue c Flammable component d Non-flammable component h Large noncombustible

Claims (3)

[Claims] 1. A pyrolysis reactor, which is provided at an outlet side of a pyrolysis reactor for pyrolyzing input waste into a pyrolysis gas and a pyrolysis residue mainly composed of a non-volatile component, wherein heat generated by the pyrolysis reactor is provided. In a discharge device of a pyrolysis reactor for separating and discharging a cracked gas and a pyrolysis residue, a conveyor for receiving and transporting the pyrolysis residue sent from the pyrolysis reactor, and one end of the conveyor Provided with an opening having a predetermined size through which the pyrolysis residue passes, and when a large incombustible substance having a size that blocks the opening out of the pyrolysis residue is clogged in the opening. , Detecting the clogging,
A discharge device for a pyrolysis reactor, wherein the conveyor is reversed to discharge the large incombustibles from another outlet, and then the conveyor is rotated forward. 2. A pyrolysis reactor, which is provided at an outlet side of a pyrolysis reactor for pyrolyzing the input waste into a pyrolysis gas and a pyrolysis residue mainly composed of a non-volatile component. In a discharge device of a pyrolysis reactor for separating and discharging a cracked gas and a pyrolysis residue, a conveyor for receiving and transporting the pyrolysis residue sent from the pyrolysis reactor, and one end of the conveyor Provided with an opening having a predetermined size through which the pyrolysis residue passes, and when a large incombustible substance having a size that blocks the opening out of the pyrolysis residue is clogged in the opening. , Detecting the clogging,
One end of the conveyor goes down to expand the opening, discharge the large incombustibles from another outlet provided near the one end, and then raise the conveyor to its original position to discharge the pyrolysis residue A discharge device for a pyrolysis reactor, characterized in that the discharge device is adapted to be used. 3. A pyrolysis reactor that pyrolyzes the input waste to generate a pyrolysis gas and a pyrolysis residue mainly composed of nonvolatile components, and a pyrolysis reactor generated by the pyrolysis reactor. A discharge device for separating and discharging a gas and a pyrolysis residue, a separation device for separating the pyrolysis residue discharged from the discharge device into a combustible component and a non-combustible component, and the pyrolysis gas And a combustion melting furnace for transferring and burning the combustible component and melting the generated ash, wherein the discharge device is a discharge device of the pyrolysis reactor according to claim 1 or 2. A waste treatment apparatus, characterized in that there is a waste treatment apparatus.