KR100577927B1 - Waste treatment facility with pyrolysis reactor - Google Patents

Abstract

(Problem) A space and a passage for maintenance are secured to shorten the piping of high temperature heating air or pyrolysis gas, and a cooling device is placed on the ground to reduce construction cost.

(Solution) Pyrolysis reactor (5) for pyrolyzing waste (a) into pyrolysis gas (Gd) and pyrolysis residue (c), and flammables (e) in pyrolysis gas (Gd) and pyrolysis residue (c). In the waste treatment apparatus (1) comprising a combustion melting furnace (6) combusted and a high temperature air heater (7) for heating the heating air (Ah) for the pyrolysis reactor (5), a space in which the work vehicle can pass is provided. The pyrolysis reactor 5 was provided on the upper part 31 formed so that it could be ensured, and the cooling apparatus 10 which cools the pyrolysis residue c on the ground surface GL was arrange | positioned.

Waste disposal equipment

Description

Waste treatment equipment equipped with pyrolysis reactor {WASTE TREATMENT FACILITY WITH PYROLYSIS REACTOR}

1 is a side view of a typical type that will become a standard of a waste treatment apparatus equipped with a pyrolysis reactor according to the present invention.

2 is a plan view of FIG. 1.

3 is a schematic side view of a waste treatment apparatus equipped with a pyrolysis reactor according to the present invention.

4 is a system diagram of a conventional waste treatment apparatus.

FIG. 5 is a side view of a typical type that will become the standard of a waste treatment apparatus equipped with a conventional pyrolysis reactor.

FIG. 6 is a plan view of FIG. 5.

7 is a schematic side view of a waste treatment apparatus equipped with a conventional pyrolysis reactor.

* Explanation of symbols for the main parts of the drawings

1: waste treatment device 5: pyrolysis reactor

6: combustion furnace 7: hot air heater

8: waste heat boiler 10: chiller

31: upper part (top plate) 32: cracked gas pipeline

33a, 33b: heating air pipe 36: owned vehicle

37: space (mening space) 38: maintenance passage

a: waste c: pyrolysis residue

d: incombustibles e: inflammables

Ac: Combustion air Ah: Heating air (high temperature)

Al: heated air (low temperature) Gc: combustion gas

Gd: Pyrolysis gas (dry gas) L1, L2: Heated air line

L3: pyrolysis gas line GL: ground surface

The present invention relates to a horizontal pyrolysis reactor that generates waste gas by pyrolyzing flammable components by heating waste at a high temperature, a separator for separating flammable solid components and non-flammable components, and a cooling device for cooling the separated solids. The present invention relates to a waste disposal apparatus provided, and more particularly, to a batch of a pyrolysis reactor or the like.

(Conventional technology)

One of the industrial waste treatment apparatuses containing general wastes such as municipal waste and combustibles such as waste plastics.The wastes are supplied to a pyrolysis reactor and heated to a high temperature in a low oxygen atmosphere to pyrolyze them to produce pyrolysis gas (dry gas) and mainly non-volatile. Pyrolysis residues composed of the components are generated, and the pyrolysis residues are cooled, and then supplied to a separation device so that flammables mainly composed of pyrolysis carbons, metals, pottery, gravel or concrete chips, etc. (I) waste which is separated into incombustibles consisting of (i), combustibles and pyrolysis gas separated into the combustion melting furnace and combusted to produce the combustion ash produced as molten slag, and the molten slag is discharged and cooled to solidify. A processing apparatus is proposed, for example, in Japanese Patent Application Laid-Open No. 6-56253.

For example, as shown in the system diagram of FIG. 4, the waste disposal apparatus 1 includes waste (a) containing combustibles such as municipal waste and the like into the hopper 3 by the garbage crane 2, The crusher 4 is crushed to an appropriate size and supplied to the pyrolysis reactor 5 of the horizontal rotary drum type (rotary kiln type).

The waste (a) supplied is about 450 ° C. in the pyrolysis reactor (5) in which the air is cut off, and from the hot air heater (7) to the heating air Ah supplied to the jacket or the heating tube via the line L1. It is heated to pyrolyze into a pyrolysis gas (dry gas) Gd and a pyrolysis residue (c) mainly composed of nonvolatile components.

Thus, the pyrolysis gas Gd generated by this pyrolysis is supplied to the burner 6a of the combustion melting furnace 6 via the line L3. The low temperature heated air A1 discharged from the pyrolysis reactor 5 is circulated to the hot air heater 7 via the line L2 having the circulation blower 9.

On the other hand, the pyrolysis residue (c) transported while generating the pyrolysis gas (Gd) in the pyrolysis reactor (5), the pyrolysis gas (Gd) and the pyrolysis residue (c) at the separation portion of the end of the pyrolysis reactor (5). The pyrolysis residue (c) is sequentially supplied to the cooling device (cooling drum) by gravity, where it is cooled to, for example, about 80 ° C.

Thus, the continuous separating device 11 separates the combustibles (e), such as carbon, and the incombustibles (d), which are composed of vortices, for example, metals or pottery, and the incombustibles (d) are collected in the container (12). The combustibles e are pulverized into fine powder by the pulverizer 13 and supplied to the burner 6a of the combustion melting furnace 6 via the line L9 as the fine combustibles e1.

In the combustion melting furnace 6, pyrolysis gas Gd supplied from the pyrolysis reactor 5 through the line L3 and fine combustibles e1 supplied from the crusher 13 through the line L9 are fed through the inlet blower through the line L10. The combustion air (Ac) supplied by 14) is burned at a high temperature of about 1,300 ° C.

Thus, the ash in the combustion material produced by this high temperature combustion and the fine combustibles e1 melt | dissolve by this high temperature combustion, become molten slag g, and it solidify | cools in the water tank 15, and this solidification The molten slag g is used again for aggregates of roads and the like.

On the other hand, the combustion gas Gc of this combustion melting furnace 6 is heat-recovered by the hot air heater 7 and the waste heat boiler 8 connected by the lines L4-L5, and is connected by the lines L6-L8. The dust is collected by a dust collecting device 16 such as a bag filter, and further washed by a gas scrubber 17 to be a relatively low temperature flue gas G1 and discharged from the chimney 18 to the atmosphere. The power generator 19 is driven by the steam S generated by the waste heat boiler 8, and this electricity is used to cover the self-consumption and to transmit surplus power to the outside.

The dust collected by the dust collector 16 is supplied to the combustion melting furnace 6 via a line L12, where it is melted and recovered as molten slag g. In addition, the main line of the waste treatment apparatus 1 is drawn into the induction fan 20 arranged behind the gas scrubber 17 and maintained at a pressure slightly lower than atmospheric pressure to maintain the entire system. As a result, gas leakage is prevented.

And when the waste treatment apparatus 1 of such a structure is constructed as a real apparatus, in order to protect this apparatus from wind and rain, it is normally installed in a building, The example is demonstrated according to FIGS. 5-7. On the lower side, a runway 23 of the garbage collector 22 is provided on one side of the building 21, and the pyrolysis reactor 5 is provided on the ground surface GL (upper surface) of the inside of the building 21, and the ground surface GL 2nd pit 25 and slag which arrange | position the 1st pit 24 which accommodates waste a, and the other arrange | position the cooling apparatus 10 below one ground surface GL adjacent to A third pit 26 (FIG. 7) for accommodating (g) is provided, and a crane for injecting waste a into the hopper 28 of the crusher 27 above the first pit 24. (29) is prepared.

The combustion melting furnace 6 is vertical, as shown in FIG. 5, and is fixed to have a height Ha from the ground surface GL to discharge the slag g from the bottom, and the burner 6a is fixed. The upper part to be mounted has a height Hb from the ground surface GL. This height Hb is 20 several meters normally. On the surface GL, a pyrolysis reactor 5 is rotatably supported by a driving device on a base 30.

On the top plate 31 provided above the pyrolysis reactor 5 in this building 21, a high temperature air heater 7, a waste heat boiler 8, a dust collector 16, etc. are arranged. The combustion melting furnace 6 and the pyrolysis reactor 7 are connected to the cracking gas conduit 32 constituting the line L3 as shown in Figs. 5 and 6, and the hot air heater 7 and the pyrolysis reactor 5 Is connected to the heating air lines 33a and 33b which make up lines L1 and L2.

By the way, when the conventional waste disposal apparatus 1 is arrange | positioned in the building 21, various problems arise. Specifically, the first problem is that the construction cost is high, and the second problem is that the repair work is difficult.

That is, the pyrolysis reactor 5 is installed on the ground surface GL, and the pyrolysis gas Gd and the pyrolysis residue c generated inside thereof are discharged at the end of the pyrolysis reactor 5. The specific gravity is separated in the portion 5a. Thus, in order to supply the pyrolysis residue (c) among the pyrolysis reactors (5) under self-weighting, the cooling device (10) needs to be disposed in the second pit (25) lower than the pyrolysis reactor (5). have.

In addition, this second pit 25 has a constraint that the second pit 25 must be configured to have an area larger than its fixed area in order to perform repair work on the cooling apparatus 10 that cools while supplying a large amount of cooling water to the jacket. For this reason, the pit 25 becomes a large one, and the construction cost of the waste disposal apparatus is inevitably high for drying this pit.

In addition, as shown in FIG. 5, the distance Hc between the pyrolysis reactor 5 and the upper part of the combustion melting furnace 6 or the gap Hd between the pyrolysis reactor 5 and the upper part of the hot air heater 7 are quite large. It is made large, and thus, the cracked gas pipeline 32 or the heated air pipeline 33a, 33b cannot be long. The cracked gas pipe 32 and the heated air pipes 33a and 33b pass through the hot heated air or the hot cracked gas, so that the cracked gas pipe 32 and the hot air cracked gas must be coated with a heat insulating material to prevent heat radiation. Longer time is associated with an increase in construction costs.

On the other hand, since the pyrolysis reactor 5 is exposed to normal temperature and rotates at all times, it is necessary to periodically perform maintenance checks or the like. In the case of such a work | work, it is necessary to carry in the heavy goods of various base materials, but in the conventional apparatus, since the space He between this pyrolysis reactor 5 and the ground surface GL is small, the work is very difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a waste treatment apparatus equipped with a pyrolysis reactor, in particular by maintaining a construction cost by maintaining a delicate arrangement of the pyrolysis reactor. It is to provide a waste treatment facility which can easily secure a space and a passage for a dragon, and can improve work efficiency of maintenance and work efficiently.

The waste disposal apparatus provided with the pyrolysis reactor which concerns on this invention for achieving the said objective is comprised as follows.

1) a horizontal rotary drum type pyrolysis reactor in which pyrolysis gas is pyrolyzed to pyrolysis residue consisting mainly of nonvolatile components by heating the waste, and the pyrolysis gas generated in the pyrolysis reactor and the caustic residue in the pyrolysis residue. A waste treatment apparatus comprising a combustion melting furnace to combust, a high temperature air heater for recovering heat from combustion gas discharged from the combustion melting furnace, and a cooling device for cooling combustibles discharged from the pyrolysis reactor,

The indicator is provided with a cooling device for disposing the pyrolysis reactor on at least an upper portion high enough to secure a space for a work vehicle and cooling the pyrolysis residue separated and discharged from the pyrolysis reactor. Exposed on the surface and composed.

As a result, in the waste treatment apparatus provided with the pyrolysis reactor which concerns on this invention, the upper part which corresponds to the 2nd layer which conventionally arranged the pyrolysis reactor arrange | positioned on the ground surface once as much as this ground surface like FIG. 5 and FIG. ), The lower portion of the pyrolysis reactor can be used as a space for various maintenance spaces such as a maintenance space, a maintenance passage, or a space such as a warehouse or a garage.

Therefore, in the waste treatment apparatus shown in FIG. 5 and FIG. 6, it was necessary to move around the pyrolysis reactor and go from one side of the pyrolysis reactor to the other side to perform various operations. Regardless, it can simply move in the direction crossing the pyrolysis reactor.

The ground or the ground surface refers to the height of the foundation when installing equipment, in particular, the base of a pyrolysis reactor, without carrying out the construction of the ground, and corresponds to the first floor. This part is usually formed at about the same level as the road that goes to the site of the waste disposal apparatus.

In addition, although the upper part means the upper surface provided in the position higher than the ground surface in order to install a pyrolysis reactor, it does not necessarily mean only covering completely as an upper surface. That is, the maintenance hole may be provided or the part which communicates may be provided so that it may be convenient for maintenance of this pyrolysis reactor.

In other words, in the upper part, the fixed position of the pyrolysis reactor is arranged higher than the ground surface, and with respect to the height of the upper part, at least a work vehicle such as a truck used for maintenance can pass in a space formed below the upper part. Height is good.

Thus, by securing a space below the pyrolysis reactor, a space and a passage for maintenance are secured, thereby improving work efficiency in maintenance.

Furthermore, by placing this pyrolysis reactor on an installation top plate which can secure a space for maintenance by being higher than the ground surface, the height of the pyrolysis reactor and the hot air heater or the combustion melting furnace is relatively close. Therefore, the heating air line and the cracked gas line can be shortened accordingly.

Moreover, this pyrolysis reactor is installed on the upper part of the height equivalent to the two-layered phase, and the cooling device for cooling the soft decomposition residue discharged | emitted and discharged | emitted from the discharge part of this end surface is provided. Even if it is disposed in the above, the pyrolysis residues can be smoothly supplied to the cooling device, and as a result, construction costs can be reduced by unnecessary underground construction work such as pits.

2) In addition, when there are a plurality of pyrolysis reactors, they may be arranged in parallel at the same height level, but if they are arranged so as to be multistage in the vertical direction, the area of the horizontal direction is reduced accordingly. As the position of the reactor increases, the heating air pipe and the cracking gas pipe shorten, thereby reducing the construction cost.

3) Furthermore, in the waste treatment apparatus provided with the said horizontal pyrolysis reactor, the passage which a work vehicle can pass under the said pyrolysis reactor, ie below the upper part, is made into the longitudinal direction of the said pyrolysis reactor. By arranging them alternately, the work efficiency can be improved.

By adopting the arrangement as described above, since the inlet of the maintenance passage can be provided on the side of the road that is circulated in parallel with the pyrolysis reactor, the land area can be saved accordingly.

Hereinafter, with reference to FIGS. 1-3, embodiment of the waste disposal apparatus provided with the pyrolysis reactor which concerns on this invention is described.

As shown in FIGS. 1-3, the inside part of the building 21 is provided with the upper part 31 of the level which is higher by the height Hu than the ground surface GL, and arrange | positions on this upper part. A horizontal rotary drum type (i.e. rotary kiln type) pyrolysis reactor 5 is rotatably supported on the base 34.

In this way, the pyrolysis reactor 5 is disposed in the upper part of the second layer above the ground surface GL, while the large and heavy combustion furnace 6 or a hot air heater disposed adjacent thereto ( 7) or the waste heat boiler 8 or the like is disposed on the ground surface GL. Therefore, even if the height H of the building 21 of this waste disposal apparatus 1 shown in FIG. 1 is equal to the height H of the building 21 of the conventional waste disposal apparatus 1 shown in FIG. The space 35 that can be used in the lower portion of the pyrolysis reactor 5 is secured by the one in which the pyrolysis reactor 5 is placed high.

Thus, a space 35 having a height at which the work vehicle 36 can pass can be secured between the ground surface GL and the upper portion 31, thereby using the maintenance space 37 or the like. The maintenance passage 38 can be provided or used as a field office, a warehouse, a parking lot, etc. as needed. In addition, as these working vehicles, depending on the scale of the waste disposal apparatus 1, a crane car or a high-altitude work vehicle for carrying out a van, a small truck, a truck, or a component exchange for carrying parts for maintenance, etc. Etc. can be thought of.

Moreover, by providing a maintenance hole or a communication hole in the upper part 31 which forms the upper part of the maintenance space 37, the pyrolysis reactor 5 can be maintained also from the lower side or the lower side surface, Especially, It can be configured to increase the work efficiency by using the work vehicle 36, such as the aerial work vehicle.

In addition, among the maintenance space 37 and the maintenance passage 38 provided in the space 35 below the pyrolysis reactor 5, that is, the portion of the ground surface GL, at least the maintenance passage 38 is the pyrolysis reactor 5. Is connected to the side circumferential roads 39a and 39b provided in parallel with each other.

In addition, a cooling drum (cooling device) 10 for cooling the pyrolysis residue (c) separated and discharged from the pyrolysis reactor 5 is disposed on the ground surface GL without constructing a pit as in the prior art. Secure a maintenance space around him.

Therefore, by the structure which arrange | positions the pyrolysis reactor 5 to the upper part 31 corresponded to a two-layer part, the part of height Hu (FIG. 1, FIG. 3) which the pyrolysis reactor 5 moved to the upper side. By this, the decomposition gas pipe 32 which guides the pyrolysis gas Gd of the pyrolysis reactor 5 to the combustion melting furnace 6 can be shortened, and the combustion gas Gc generated in the combustion melting furnace 6 and the high temperature can be shortened. The heating air conduits 33a and 33b for circulating the heating air Ah for heat exchange with the air heater 7 can also be shortened.

According to the waste disposal apparatus 1 provided with the pyrolysis reactor of the above structure, since the upper part 31 can form the wide space 35 below this pyrolysis reactor 5, The maintenance passage 38 or the maintenance passage 38 for reaching each device can also be easily secured. The maintenance space 37 can be secured at a position suitable for maintenance work of each device, and the maintenance passage can be simplified. Therefore, the work efficiency of maintenance is improved.

In general, this maintenance is carried out by stopping the waste treatment apparatus 1 about once every six months and once per system. Therefore, when the maintenance efficiency of the maintenance is high, the maintenance cost is large.

Moreover, since the position of the pyrolysis reactor 5 is provided in the upper part 31 corresponding to the upper part of the two-layer upper part which is higher than the ground surface GL, the circumference | surroundings of the rotary drive part in the lower part of the pyrolysis reactor 5 are provided. In addition, maintenance space can be secured, and cleaning and replacement of parts can be performed from the lower side, so that maintenance work becomes easy and work efficiency is improved.

As described above, when the installation height of the pyrolysis reactor 5 is increased, the decomposition gas pipe 32 and the heating air pipes 33a and 33b can be shortened, and at the lower side than the pyrolysis reactor 5. Since the cooling apparatus (cooling drum) 10 arrange | positioned is provided in ground surface GL, it is not necessary to excavate underground and construct a pit, As a result, a building cost can be reduced significantly.

Moreover, the space part of the up-down direction of the part of the pyrolysis reactor 5 in the building 21 in which the combustion melting furnace 6 arrange | positioned vertically with the horizontal rotary drum type pyrolysis reactor 5 arrange | positioned in the horizontal direction is effectively used. It can use, and can improve the use efficiency of land.

When there are a plurality of pyrolysis reactors 5, instead of arranging the pyrolysis reactors 5 in parallel in the horizontal direction at the same height level, as shown in Fig. 2, the pyrolysis reactors 5 are not shown in the other pyrolysis reactors. They may be arranged so as to be stacked on top of each other and arranged so as to be multistage in the vertical direction, that is, in the vertical direction.

As a result, the land area is reduced by overlapping the top of the pyrolysis reactor, and since the position of the pyrolysis reactor is increased, the heating air pipe and the cracking gas pipe can be shortened, and the construction cost can be further reduced.

As apparent from the above description, according to the waste disposal apparatus provided with the pyrolysis reactor which concerns on this invention, the following effects can be acquired.

1) Since the pyrolysis reactor is installed on the upper part, the space can be secured under the space, so that the space can be used as a maintenance space, a maintenance passage, an office, a warehouse, or a parking lot, if necessary, It is easy to get in and out of work vehicles such as trucks and inspection vehicles, and can effectively cope with various tasks, thereby significantly improving work efficiency.

2) By installing the pyrolysis reactor on the upper portion of the pyrolysis reactor at least above the ground, the maintenance space is secured around the rotational drive portion in the lower portion of the pyrolysis reactor. It is possible to perform cleaning and replacement of parts from the lower side, so that maintenance is easy and work efficiency is improved.

3) The construction cost can be reduced because both the cracked gas pipeline connecting the pyrolysis reactor and the combustion melting furnace or the hot air air heater adjacent to the combustion melting furnace and the heated air pipeline connecting the pyrolysis reactor can be shortened. In addition, the heat insulation structure can be shortened, and the thermal efficiency of the entire waste treatment apparatus can be improved.

4) By installing the pyrolysis reactor on the upper part, it is possible to install a cooling device for cooling the pyrolysis residues separated and discharged from the pyrolysis reactor on the ground surface, and the construction cost is greatly reduced because no underground construction work is required. do.

5) The space part in the vertical direction of the part of the pyrolysis reactor can be effectively used in the building in which the horizontally rotating drum type pyrolysis reactor and the vertically arranged combustion melting furnace are arranged, so that the land utilization efficiency can be improved. .

Claims (3)

A horizontal rotary drum type pyrolysis reactor for pyrolyzing the waste to pyrolysis residue consisting mainly of pyrolysis gas and nonvolatile components, and a combustion melting furnace for burning the pyrolysis gas generated in the pyrolysis reactor and the combustibles in the pyrolysis residue; A waste treatment apparatus comprising: a high temperature air heater for recovering heat from combustion gas discharged from the combustion melting furnace, and a cooling device for cooling combustibles discharged from the pyrolysis reactor; A cooling device for installing the pyrolysis reactor at least on an upper portion high enough to secure a space where a work vehicle can pass, and cooling the pyrolysis residue separated and discharged from the pyrolysis reactor; Waste treatment apparatus equipped with a pyrolysis reactor, characterized in that disposed on the ground surface. The method of claim 1, And a plurality of said pyrolysis reactors, wherein said pyrolysis reactor is arranged in multiple stages in the vertical direction. The method according to claim 1 or 2, A waste treatment apparatus provided with a pyrolysis reactor, wherein a passage through which a work vehicle can pass is orthogonal to a longitudinal direction of the pyrolysis reactor under the pyrolysis reactor.

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