JPH11351532A - Waste treatment equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide means capable of reducing the piping length of an exhaust gas channel by making distances among subsidiary devices as short as possible in waste treatment equipment having a treatment furnace set up in an underground space for burning subjects thrown therein to be processed. SOLUTION: An equipment space A1 is formed of a vertical or inclined shaft dug toward undernearth and subsidiary equipment 3 for a treatment furnace F is disposed along the equipment space A1. An accessory accommodating space of a cave communicating with the equipment space A1 is excavated at the side of the subsidiary equipment 3 for accommodating therein an accessory 7 for the subsidiary equipment 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste treatment facility and, more particularly, to a waste treatment facility in which a treatment furnace for burning and treating an inputted object is provided in a facility space formed underground. .

[0002]

2. Description of the Related Art Heretofore, facilities such as incineration facilities and melting processing facilities, mainly processing furnaces with a combustion process, have been arranged in a plane on a large site such as an incineration plant. For this reason,
In view of the fact that land shortages have become severe and that the aesthetic problems of the urban area cannot be ignored, underground large cavities and chimney pits following the underground large cavities are excavated in the mountains, and incinerated in the underground large cavities. It has been proposed to provide a treatment plant (for example, see Japanese Patent Application Laid-Open No. Hei 7-116627).

[0003]

SUMMARY OF THE INVENTION In the above proposal,
The conventional incineration equipment is to be relocated to the mountain basement as it is, and no proposal has been made for changing the equipment arrangement due to the underground equipment. Accordingly, the applicant of the present application has arranged a processing furnace and an exhaust gas treatment device for the processing furnace in an underground space formed above and below as a means for effectively using the site in a small site area. Has been proposed. However, there remains a problem in reducing the volume of the excavation pit for forming the underground space in which the treatment furnace and the exhaust gas treatment device vertically disposed in the space above the treatment furnace are to be arranged. That is, for example, some auxiliary equipment arranged vertically is equipped with auxiliary equipment, and if it is arranged on the side of the main engine, it is necessary to increase the plane sectional area accordingly. Even if it is a machine, it is necessary to install it between the accompanying facilities. Therefore, the limit of the reduction of the plane sectional area of the underground space is set by the auxiliary equipment, and there is also a limit to the reduction in the depth of the underground space. In addition, if the space between the upper and lower facilities is increased, the length of the exhaust gas path and the length of the steam path are correspondingly increased, which causes an increase in the heat radiation area, which causes a reduction in thermal efficiency. Therefore,
It is an object of the present invention to solve the above-mentioned problems and to provide a means capable of shortening the length of a pipe for an exhaust gas path by minimizing the interval between the associated facilities.

[0004]

Means for Solving the Problems [Characteristic structure and its operation and effect] The characteristic structure of the waste treatment equipment of the present invention for the above purpose is excavated underground as described in claim 1. With a shaft or a shaft, an equipment space is formed, and the accompanying equipment of the processing furnace is arranged along the equipment space,
An auxiliary equipment accommodating space consisting of a lateral hole communicating with the equipment space is excavated and formed on the side of the auxiliary equipment to accommodate the auxiliary equipment for the auxiliary equipment.

[0005] According to the above-mentioned characteristic configuration, only the main unit of each auxiliary equipment needs to be arranged in the equipment space, so that the installation interval of each auxiliary equipment can be narrowed, and the auxiliary equipment can be accommodated in the auxiliary equipment accommodation space, that is, another space. Since the auxiliary facilities can be arranged close to each other, the installation distance of piping and the like can be shortened. Therefore, it is possible to reduce the heat radiation loss in the exhaust gas path, the steam path, and the like, and to configure a compact waste treatment facility. As a result, a large site is not required for the installation of waste treatment facilities, and the excavation cross-sectional area can be reduced and the excavation depth can be reduced, improving the thermal efficiency of the waste treatment facilities. it can.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an embodiment of the above-mentioned waste treatment equipment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a waste treatment facility as an example of an embodiment of the present invention, and FIG.
3 is a cross-sectional view for explaining a bag filter device of the waste treatment facility, and FIG. 4 is a longitudinal cross-sectional view illustrating an installation state of the bag filter device of the waste treatment facility. FIG.

As shown in FIG. 1, the waste treatment equipment includes a treatment furnace F for charging an object to be treated and performing combustion treatment, and an exhaust gas from the treatment furnace F as an auxiliary equipment 3 of the treatment furnace F. A waste heat boiler 4 that also has a cooling facility function to recover waste heat, a superheater 4a that superheats steam from the waste heat boiler 4, and a power generation that generates power using the steam superheated by the superheater 4a A housing formed underground with an apparatus 6 and a plurality of exhaust gas treatment apparatuses 5 for performing predetermined processing such as exhaust gas cooling, dust removal, and removal of harmful gas components in the exhaust gas on the exhaust gas from the waste heat boiler 4. It is provided in the space A.

The accommodation space A is formed by providing a box-shaped space peripheral wall portion 11 in a shaft excavated from the ground, and divided by a partition wall 12 composed of a vertical wall to form two compartment spaces B. , An equipment space A1 and a maintenance space A2. The partition wall 12 is provided with an opening 12a to communicate between the equipment space A1 and the maintenance space A2.

A melting furnace 2 as an example of the processing furnace F and an incinerator 1 as an example of the processing furnace F disposed above the melting furnace 2 are provided at the bottom of the space of the storage space A. Has been installed. Then, the auxiliary equipment 3 of the processing furnace F, that is, the waste heat boiler 4, the superheater 4a, and the exhaust gas treatment device 5 are sequentially placed at different height positions from bottom to top in the equipment space A1. Are located.

Each of the exhaust gas treatment devices 5 constituting each of the auxiliary equipments 3 has a different arrangement height from a lower position to a higher position in accordance with the treatment order of the exhaust gas, and the exhaust gas treatment devices 5 arranged below. The gas discharge part 22 formed at the upper part is connected to the gas introduction part 21 formed at the lower part of the exhaust gas treatment device 5 arranged at the upper part, and the integrated exhaust gas path 18 is formed.
And a support mechanism 13 fixed to an underground beam buried in the ground around the accommodation space A and suspending and supporting the individual exhaust gas treatment devices 5.

The exhaust gas treatment apparatus 5 includes a feed water preheater 8A for recovering residual heat of exhaust gas from the waste heat boiler 4 and preheating boiler feed water to the waste heat boiler 4, and heat recovery by the feed water preheater 8A. Secondary gas cooling device 8B for cooling the exhaust gas after the cooling to the dust removing temperature, a dust removing device 9 including a bag filter device for removing the dust from the cooled exhaust gas, and a temperature at which the exhaust gas after the dust removing is effectively operated by the denitration catalyst. A reheater R that raises the temperature again, and a catalytic denitration device 10A as an exhaust gas cleaning device 10 that removes harmful gas components such as nitrogen oxides from the exhaust gas after reheating are provided in order from the bottom. Each of these exhaust gas treatment devices 5 connects the gas discharge part 22 of the exhaust gas treatment device 5 arranged below to the gas introduction part 21 of the exhaust gas treatment device 5 arranged above substantially airtightly and flexibly, Said To form an exhaust gas passage 18 for guiding the exhaust gas from the physical furnace F upward, is connected to a chimney provided on the ground.

There is a distance above the incinerator and the ground, and the dust pit 16 can be provided on the dust hopper 1a. Therefore, as shown in FIG.
Intermediate receiving portions 16b that can swing and open and close are provided in multiple stages for receiving the dust dropped from 6a, and the intermediate receiving portions 16b are intermittently opened and closed, so that the dust is compacted in the dust pit 16. It is configured to prevent this. In this way, since the garbage is dropped into the garbage hopper 1a by its own weight, the garbage can be directly charged from the garbage truck into the garbage hopper 1a via the garbage pit 16, and the conventional garbage crane is unnecessary. Become. still,
In order to drain the trash, the trash pit 16 is provided with a pit water drainage channel 16c that discharges water to the side and guides the water downward, and the pit water leaking from the drain port is used as the pit water drainage channel 16c. (See FIG. 2). The pit water collected in the lower part of the pit water drainage channel 16c is sprayed into the incinerator 1, and is subjected to a deodorizing and purifying process.

[0013] The removed matter from each of the associated equipments 3, that is, the scattered dust from the processing furnace F deposited below the waste heat boiler 4,
The dust settling in the gas cooling device 8 and the dust collected by the dust removing device 9 are transferred from the respective hoppers (not shown) to the equipment space A1.
The dust is discharged toward a dust collection duct 19 (not shown in FIG. 1; see FIG. 3) provided along the
Inside the incinerator 1 and merges with the incineration ash discharged from the ash chute 1b of the incinerator 1, and is guided to the workpiece charging portion 2a of the melting furnace 2. I have. Further, the cleaning waste liquid from the exhaust gas cleaning device 10 is:
A cleaning liquid discharge pipe (not shown) of the exhaust gas cleaning device 10 is connected to a drain pipe (not shown) provided along the facility space A1, and the storage space A is connected to the storage space A via the drain pipe.
The drains discharged from the gas cooling device 8 and the like are merged and detoxified by a drainage treatment device (not shown) disposed at the bottom of the space. It is so. The drain pipe is disposed in a pit water discharge passage 16c formed along the trash pit 16 attached to the incinerator 1 described above.

The molten slag produced by melting the incineration ash and the like in the melting furnace 2 is supplied from a slag pit to a slag crushing facility 24 composed of a wet ball mill by a conveying means, and is converted from the slag crushing facility 24 as slurry of the crushed slag. It is discharged and sent to a slag storage tank 25c for temporarily storing slurry. The sent slurry of the pulverized slag is separated from the metal by classification, and the slag slurry after separating the metal is temporarily stored and stirred to be sent to a slag mixer 25b for maintaining a good fluid state, and the slurry is separated therefrom. By the pump 25a, it is carried out to the ground via a slurry transport pipe 25d arranged toward the ground in the equipment space A1. The slurry pump 25a and the slag mixer 2
5b, the slag storage tank 25c, and the slurry transport pipe 25d constitute a slurry transport facility 25A which is an example of the slag discharge means 25.

The dust removal device 9 of the exhaust gas treatment device 5
The upper structure 9a of the bag filter device 9A as shown in FIG.
Is provided on all four sides of the periphery, and is provided with a gas discharge unit 22 that discharges exhaust gas after dust removal from the upper part, is configured to discharge the exhaust gas upward, and a gas introduction part 21 is formed at the lower part, An exhaust gas introduction port is formed at the center of the bottom by a rotating bed 9d having an opening, and exhaust gas is introduced from below.
Is attached to the bag filter 9c to form a bag filter device (see FIG. 3). A back-and-back mechanism 17b for moving the backwash nozzle 17a to and from the bag filter 9c, and a backwash air supply mechanism 17
e, the backwashing mechanism 17 such as the auxiliary machine 7 is excavated beside the bag filter device 9A as shown in FIG.
It is installed in the auxiliary equipment accommodating space S formed as follows. The rotary bed 9d is configured by providing a reflection plate 9e for the exhaust gas flow, deflecting the exhaust gas flow from the exhaust gas inlet of the gas introduction unit 21, and entraining the air on the rotary bed 9d. This is for dropping dust to be taken out, taking out the dust dropped by the scraping mechanism 9f together with the dust falling from the bag filter 9c, and enabling continuous processing. The extracted dust finally falls through the dust collection duct 19 into the workpiece charging portion 2a of the melting furnace 2. In this case, even if the exhaust gas flows into the dust collecting duct 19, the exhaust gas circulates and returns to the incinerator 1, and convection occurs, so that dust is not blown up in the dust collecting duct 19.
Since the accessory storage space S is provided as described above, the support mechanism 13 supports the bag filter device 9.
A, only the main part of A, and the auxiliary equipment 7 is installed on the ground in the auxiliary equipment accommodating space S, so that the auxiliary equipment 7 is stably supported, and the support mechanism 13 of the bag filter device 9A is provided.
Also need not be particularly large.

Next, another embodiment of the present invention will be described. <1> In the above-described embodiment, an example has been described in which the exhaust gas treatment device 5 is provided in the equipment space A1 from the lower position to the higher position in order from the lower position in accordance with the processing sequence of the exhaust gas. However, the arrangement order of the exhaust gas treatment device 5 may be different from this.

<2> In the above embodiment, an example was described in which the exhaust gas cleaning device 10 was provided with the catalytic denitration device 10A. However, the exhaust gas cleaning device 10 was constituted by a wet exhaust gas treatment device 10B. You may. For example,
As shown in FIG. 5, as described in the above embodiment,
The wet exhaust gas treatment apparatus 10B is provided with a contact packed layer, a reaction liquid contact tower 26 for cleaning and removing nitrogen oxides and the like in the exhaust gas by contacting the reaction liquid, and a spray water contact layer for cooling the exhaust gas after cleaning. The exhaust gas cooling tower 27,
The reaction liquid after contacting with the exhaust gas is temporarily stored in a collection section 23a provided in the gas introduction section 21 of the reaction liquid contact tower 26, and the exhaust gas cooling tower 27 is provided with a collection section 23a of the gas introduction section 21. In addition to temporarily storing water after contact with the exhaust gas, a demister that captures a mist accompanying the exhaust gas discharged to the gas discharge unit 22 is provided, and an auxiliary machine space S is formed on each side. A circulation pump 10a may be installed to pump up and circulate the reaction liquid or the cooling water temporarily stored in the collecting section 23a, and spray the reaction liquid or exhaust gas toward the exhaust gas. The circulation pump 10 of the exhaust gas cooling tower 27
It is more preferable that a circulating water cooling mechanism be provided at the outlet a side.

<3> In the above embodiment, the housing space A is formed by providing a box-shaped space peripheral wall portion 11 in a shaft excavated from the ground, and is partitioned by a partition wall 12 composed of a vertical wall. Thus, two partition spaces B are formed to form an equipment space A1 and a maintenance space A2. The partition wall 12 is provided with an opening 12a to provide the equipment space A1 and the maintenance space A.
2 has been described, but the accommodation space A may be formed in a cylindrical space peripheral wall portion 11 buried in a shaft, and the peripheral wall portion 11 has a cylindrical shape. If it is, the strength of the surrounding ground against the earth pressure increases, so that even if it is thin, it sufficiently functions as a peripheral wall. Further, the housing space A may be partitioned by a vertical partition wall 12 and divided into a plurality of partition spaces B in the circumferential direction. Further, the housing space A is provided with a cylindrical shell inside the cylindrical space peripheral wall portion 11, and the housing space A is vertically divided into a plurality of sections between the shell and the space peripheral wall portion 11 outside the shell. It may be divided into a space B, for example, as shown in FIG. 6, a space between the space peripheral wall portion 11 and the outer side of the shell arranged in the housing space A is divided into six pieces in the circumferential direction. Is divided into a compartment space B composed of three facility spaces A1 and three maintenance spaces A2, and the facility space A1 for arranging the accompanying facilities 3 located above, It is also possible to select an equipment arrangement different from the equipment space A1 in which the auxiliary equipment 3 located below is arranged. With this arrangement, the equipment space A1
The height of each of the associated facilities 3 to be accommodated in the vertical shaft can be reduced, and the depth of the shaft can be reduced. Further, if the compartment B is a fire-prevention compartment, even if a fire occurs, it is possible to prevent at least the spread of fire or the spread of fire to another compartment B. Also, even if the harmful gas leaks in one compartment B, it can be prevented from leaking into another compartment B, which is effective in disaster prevention.

<4> In the above embodiment, the housing space A is formed by providing a box-shaped space peripheral wall portion 11 in a shaft excavated from the ground, and partitioned by a partition wall 12 composed of a vertical wall. Thus, the formed two partition spaces B are formed in the equipment space A1 and the maintenance space A2, and the partition wall 12 has an opening 12
a, the example in which the equipment space A1 and the maintenance space A2 are communicated with each other has been described. For example, as shown in FIG. 7, equipment formed by a shaft excavated from the ground surface to the underground. The accommodation space A is constituted by a divided space composed of a space A1 and a maintenance space A2 formed by a shaft excavated in parallel along the equipment space A1, and the accommodation space A1 is provided.
In each of the auxiliary equipments 3, that is, the waste heat boiler 4, the superheater 4a, and the exhaust gas treatment device 5, the height positions may be sequentially changed from bottom to top.

<5> In the above item <4>, the ancillary equipment 3 may be a movable space C which can be moved laterally into the maintenance space A2 between the equipment space A1 and the maintenance space A2. The maintenance space A2 is used as a facility / equipment carry-in passage when the waste treatment facility is installed in a mine. After the waste treatment facility is installed, the maintenance space A2 is used as a facility inspection place, and for carrying in / out of inspection equipment. As a carry-out passage, it is further used as a carry-in / out passage for equipment or components necessary for maintenance of the equipment, such as replacement parts of the auxiliary equipment 3 and the processing furnace F at the time of maintenance. In this way, in the case of large-scale maintenance and inspection that requires partial disassembly of the dust removing device 9, the gas cooling device installed below and adjacent to secure a work space up and down. 8 or the exhaust gas cleaning device 10 installed above can be entirely or partially retracted from the moving space C to the maintenance space A2. For this purpose, the underground beam 1 buried in the ground is provided in the maintenance space A2 so that a support frame can be temporarily provided.
It is more preferable that a part of the support frame 4 be protruded into the maintenance space A2 and the support frame mounting portion 15 be provided.

<6> In the above description, an example in which the accommodation space A is formed by a vertical shaft has been described. However, the accommodation space A is formed by an inclined shaft excavated underground, and is directly or indirectly supported on the ground around the inclined shaft. A supporting mechanism 13 may be provided in each of the exhaust gas treatment devices 5. For example, as shown in FIG. 8, an equipment space A1 is formed by excavating a shaft shaft, and an adjacent shaft shaft is excavated to form a maintenance space A2 above the equipment space A1 so as to constitute the accommodation space A. In this way, a moving space C that connects the equipment space A1 and the maintenance space A2 may be formed. According to the configuration of the accommodation space A, each of the accompanying facilities 3 is provided with a peripheral wall 1 of the facility space A1.
Since it can be installed on one ground, the structure of the support mechanism 13 of each of the accompanying facilities 3 can be simplified.
Further, since the lower part of the equipment space A1 is the ground, sufficient supporting strength can be expected, and each of the accompanying equipments 3 can be stably supported. FIG. 8 shows the equipment space A1.
The above shows an example in which the maintenance space A2 is formed above, but the maintenance space A2 may be formed on the side of the equipment space A1, may be formed below, or may be formed obliquely upward. Alternatively, it may be formed diagonally below.

<7> In the above description, an example of arranging the auxiliary equipment 3 in a shaft or an inclined shaft has been described. For example, as shown in FIG. 9, an introduction shaft L formed of a shaft excavated in the ground is used as a maintenance space. As A2, the auxiliary equipment accommodating space S may be formed in a plurality of subspaces E excavated in the lateral direction at different heights. Then, the auxiliary equipment 7 of each auxiliary equipment 3 may be installed on the ground in the auxiliary equipment accommodation space S formed by each sub space E.

<8> In the above description, an example in which the accommodation space A is formed by a shaft or a shaft is described. However, the storage space A is formed to be bent so that the shaft and the shaft or a combination of the shafts is formed. You may. Further, a horizontal tunnel formed in a horizontal direction may be used in place of the above-mentioned inclined shaft. Regardless of the configuration of any of the accommodation spaces A, if each auxiliary facility 3 is arranged in the longitudinal direction of the pit in a pit securing the inside diameter required for installing the facilities, each pit can be formed with a small diameter. It is not necessary to make the supporting mechanism 13 of each auxiliary equipment 3 heavy, and since the support mechanism 13 can be supported on the ground, the excavation depth can be reduced while the auxiliary equipment 3 can be stably supported. Can be shallow.

<9> In the above-described embodiment, the underground beam 14 buried in the ground around the shaft is projected into the accommodation space A, and the tip of the underground beam 14 is used as the support frame mounting portion 15 so as to treat each exhaust gas. Although the example in which the support mechanism 13 of the device 5 is attached and each of the exhaust gas treatment devices 5 is directly supported on the surrounding ground has been described, an anchor material is driven into the ground around the shaft, and a supporting force is applied to the anchor material. It is also possible to provide a support mechanism 13 for each of the exhaust gas treatment devices 5 configured so as to provide the exhaust gas treatment device 5 directly on the surrounding ground. This support structure is effective when the space peripheral wall portion 11 is formed of a thin cylindrical shell.

<10> In the above embodiment, an example in which the incinerator 1 and the melting furnace 2 are installed has been described as an example of the processing furnace F. However, the processing furnace F is not limited to these, and A combined furnace in which a swirling melting furnace is incorporated in the furnace or a single pyrolysis melting furnace may be used, or an incinerator or a melting furnace may be provided alone.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an example of a waste treatment facility of the present invention.

FIG. 2 is a schematic configuration diagram showing an example of a characteristic portion of an incinerator of a waste treatment facility according to the present invention.

FIG. 3 is a schematic configuration diagram showing an example of a bag filter device of a waste treatment facility according to the present invention.

FIG. 4 is a schematic configuration diagram showing an example of an arrangement of a bag filter device according to the present invention.

FIG. 5 is a schematic configuration diagram showing another example of the waste treatment facility of the present invention.

FIG. 6 is a plan cross-sectional view of a main part showing another example of arrangement of the waste disposal equipment of the present invention.

FIG. 7 is a cross-sectional view illustrating another example of the waste treatment facility of the present invention.

FIG. 8 is a longitudinal sectional view illustrating another example of the waste treatment equipment of the present invention.

FIG. 9 is a longitudinal sectional view illustrating another example of the waste treatment equipment of the present invention.

[Explanation of symbols]

 3 Auxiliary equipment 7 Auxiliary equipment A1 Equipment space F Processing furnace S Auxiliary equipment accommodation space

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mitsuyuki Nishihara 2-47, Shizitsu Higashi 1-chome, Namiwa-ku, Osaka-shi, Osaka (72) Inventor Tomoyuki Takeda Shimotsu, Naniwa-ku, Osaka-shi, Osaka 2-47 Higashi 1-chome Inside Kubota Corporation (72) Inventor Kiyoshi Sugiki 1-20-19 Shimanouchi, Chuo-ku, Osaka City, Osaka Prefecture Inside New Jec Co., Ltd. (72) Inventor Tangen Mizuguchi 2 Nishishinmachi, Akashi City, Hyogo Prefecture 1-5, Chome Co., Ltd.

Claims (1)

[Claims] 1. A waste treatment facility in which a treatment furnace (F) for burning and treating an inputted object to be treated is provided in a facility space (A1) formed underground, wherein the facility space (A1) Is formed by a shaft or an inclined shaft excavated underground, and the auxiliary equipment (3) of the processing furnace (F) is arranged along the equipment space (A1). Beside the equipment space (A
A waste treatment facility in which an auxiliary equipment accommodating space (S) consisting of a lateral hole communicating with 1) is formed by excavation and accommodating an auxiliary equipment (7) for the auxiliary equipment (3).