JP7246839B1 - Waste treatment equipment and waste treatment plant - Google Patents

Abstract

Kind Code: A1 A waste treatment apparatus and a waste treatment plant using the same are provided that can produce useful materials even if the amount of input waste is relatively small. A waste disposal apparatus (1) includes a substantially cylindrical furnace body (2) which is rotationally driven with its center axis directed horizontally, and one end side of the furnace body (2), which is opened and closed by an opening/closing door (3) to allow the waste to be treated. An opening 2a for loading and unloading objects, a superheated steam supply opening 6a installed on the other end side of the furnace body 2 and supplying superheated steam to the inside of the furnace body 2, and the other end side of the furnace body 2. A gas-liquid discharge pipe 7 for discharging at least one of gas and liquid in the furnace body 2, a stirring blade 12 for stirring the object to be processed as the furnace body 2 rotates, and an outer wall surface of the furnace body 2 and a motor 32 for rotating the furnace body 2 . When the object to be treated is heated by being brought into contact with the superheated steam, the synthetic resin waste in the object to be treated is melted or vaporized to produce liquid or gas, and the plant waste is carbonized to produce charcoal. be done. [Selection drawing] Fig. 1

Description

The present invention relates to a waste treatment apparatus for treating a relatively small amount of waste to produce useful materials, and a waste treatment plant using the same.

2. Description of the Related Art Conventionally, various attempts have been made to produce useful substances by subjecting wastes discharged from households and various industries to treatments such as sorting and processing. As one of such attempts, the applicant has proposed a recycling plant that processes waste discharged from homes and businesses to produce compost and solidified fuel (see Patent Document 1).

This recycling plant consists of a pretreatment line for pretreatment of collected waste, a wood production line for processing woody waste, an object to be treated from the pretreatment line and an object to be treated from the wood production line. A mixing line that mixes , a fermentation drying line that ferments and then dries the processed material from the mixing line, a sorting line that sorts the processed material from the fermentation and drying line, and a processed material from the sorting line that is molded. and an RPF production line for producing RPF (Refuse Paper and Plastic Fuel).

The pretreatment line consists of a coarse crusher, a swing sorter, a wind sorter, a magnetic separator, etc. The wood material production line consists of a coarse crusher and a wood chip yard, and the fermentation/drying line consists of a plurality of It consists of a fermentation building and a deodorizing building. The sorting line consists of a belt feeder, an oscillating sorter, a magnetic separator, a specific gravity sorter, etc. The RPF production line consists of a screw type molding machine, deodorizing equipment, etc. there is This recycling plant separates wastes into combustibles and noncombustibles in a pretreatment line, and processes wooden wastes in a wood material production line to form wood pieces. After the combustible material from the pretreatment line and the combustible material such as wood chips from the wood production line are mixed in the mixing line, they are fermented and dried in the fermentation drying line. The fermented and dried materials are sorted into RPF materials and compost on a sorting line. The RPF material is molded on the RPF production line to produce the RPF. Thus, RPF and compost are produced from waste. In order to stably produce RPF and compost, this recycling plant needs to be stably loaded with waste exceeding a predetermined amount. It is suitable for processing things.

Japanese Patent No. 5649697

By the way, recently, with the growing awareness of environmental problems, there is a growing demand for waste recycling even in small-scale local governments with less than a few thousand employees and business establishments such as factories. However, the above-mentioned conventional recycling plant requires a predetermined amount of waste to be input in order to stably produce RPF and compost. Therefore, it is not realistic to introduce it to small-scale local governments and business establishments.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a waste treatment apparatus and a waste treatment plant using the same that can produce useful materials even if the amount of waste input is relatively small. .

In order to solve the above problems, the waste disposal device of the present invention includes:
a generally cylindrical furnace body that is rotationally driven with its central axis directed horizontally;
an opening formed at one end of the furnace body, opened and closed by an opening/closing door, and used for loading and unloading the material to be processed;
a superheated steam supply unit installed on the other end side of the furnace body for supplying superheated steam to the inside of the furnace body;
a gas-liquid discharge unit installed on the other end side of the furnace body for discharging at least one of gas and liquid in the furnace body;
a stirring blade installed on the inner wall surface of the furnace body for stirring the object to be processed as the furnace body rotates;
a heating device for heating the outer wall surface of the furnace body;
and a driving device for rotationally driving the furnace body.

According to the above configuration, the waste, which is the object to be treated, is put into the approximately cylindrical furnace body that is rotationally driven through the opening formed at one end. When the object to be processed is put into the furnace body, the opening is closed by the opening/closing door, and the furnace body is rotationally driven by the driving device. Superheated steam is supplied to the inside of the furnace body from the superheated steam supply unit, and the outer wall surface is heated by the heating device. The object to be processed in the furnace body is stirred by the stirring blades as the furnace body rotates. In this manner, the object to be treated is supplied with superheated steam and heated and stirred by the heating device while the supply of oxygen is shut off in the closed furnace. As a result, synthetic resin wastes such as plastics in the object to be treated are melted or vaporized to produce liquids and gases, and plant wastes such as waste wood and wood chips are carbonized to produce charcoal. . The liquid and gas thus generated in the furnace are discharged by the gas-liquid discharge section. Synthetic resin material and fuel can be extracted and reused from the liquid and gas discharged by the gas-liquid discharge part. In addition, by taking out charcoal from the residue of the object to be treated discharged from the furnace after the treatment is completed, the charcoal can be reused as fuel or the like. As described above, the waste treatment apparatus of the present invention performs a plurality of sorting processes only by putting waste mixed with synthetic resin-based waste and plant-based waste into the furnace and operating it. Liquids or gases, mainly petroleum-based materials, and useful materials such as charcoal, can be extracted without any additional processing steps. Therefore, this waste disposal apparatus can manufacture useful materials from waste with a smaller apparatus configuration than conventional ones. In addition, this waste treatment apparatus can produce useful materials even if the amount of waste put into the furnace is small.

In one embodiment of the waste treatment apparatus, a stirring chamber in which the stirring blades are arranged and a gas-liquid circulation chamber in which the superheated steam supply section and the gas-liquid discharge section are provided are formed inside the furnace body. ,
A partition wall for partitioning the stirring chamber and the gas-liquid circulation chamber has a gas circulation hole for circulating the superheated steam and the gas between the gas-liquid circulation chamber and the stirring chamber, and a gas-liquid circulation for the liquid from the stirring chamber. It has a liquid communication hole that communicates with the chamber.

According to the above embodiment, when the waste treatment apparatus is operated, the material to be treated is stirred by the stirring blades in the stirring chamber of the furnace body, and superheated steam is introduced from the superheated steam supply section into the gas-liquid circulation chamber of the furnace body. . The superheated steam in the gas-liquid circulation chamber is led to the stirring chamber through gas circulation holes in the partition wall. In the object to be treated, which is stirred in the stirring chamber, comes into contact with the superheated steam, and is heated by the heating device, the synthetic resin-based waste melts or vaporizes to produce liquid or gas. The liquid among these is led to the gas-liquid circulation chamber through the liquid circulation hole. Also, the gas is guided to the gas-liquid circulation chamber through the gas circulation holes. The liquid and gas guided to the gas-liquid circulation chamber are discharged through the gas-liquid discharge section. In this way, superheated steam can be supplied into the furnace and liquid and gas can be effectively discharged from the furnace.

In one embodiment of the waste treatment apparatus, the superheated steam supplied by the superheated steam supply unit and the gas and liquid discharged by the gas-liquid discharge unit are arranged on the central axis of the end surface of the furnace body. It is formed to flow through a rotary joint.

According to the above embodiment, superheated steam can be stably supplied to the rotating furnace body via the rotary joint arranged on the central axis of the end surface of the furnace body, and the rotating furnace body can be stably supplied with superheated steam. Vapor and liquid can be evacuated.

In one embodiment of the waste treatment apparatus, the gas-liquid discharge part extends downward inside the furnace body from the rotary joint, and has a discharge pipe whose lower end opens toward the inner wall surface of the furnace body. .

According to the above-described embodiment, the discharge pipe of the gas-liquid discharge section draws in the liquid accumulated in the lower part of the furnace body and the gas in the furnace body from the opening facing the inner wall surface of the lower part of the furnace body to the outside. to the Since this discharge pipe is connected to the rotary joint, it is stably held in position with respect to the rotating furnace body, and the opening at the lower end is held at the bottom of the furnace body. Therefore, the liquid accumulated in the lower part of the furnace body can be stably discharged.

In one embodiment of the waste treatment apparatus, the stirring blades have a first stirring blade positioned substantially in the center in the central axis direction of the furnace body and second stirring blades positioned on both sides of the first stirring blade. death,
The first stirring blade is formed to lift the object to be processed upward with the rotation of the furnace body and drop it from a predetermined height,
The second stirring blade is formed so as to lift the object to be processed upward as the furnace body rotates, drop it from a predetermined height, and move it toward the first stirring blade.

According to the above embodiment, as the furnace body rotates, the object to be processed is lifted upward by the first stirring blades of the stirring blades and dropped from a predetermined height to the inner lower portion of the furnace body. Further, the object to be processed is lifted upward by the second stirring blade of the stirring blades, dropped from a predetermined height to the lower part inside the furnace body, and moved toward the first stirring blade. As a result, the object to be treated is effectively agitated and brought into contact with the superheated steam, thereby promoting at least one of melting, vaporization, carbonization and decomposition.

In one embodiment of the waste treatment apparatus, a portion of the first stirring blade fixed to the inner wall surface of the furnace body is formed with a liquid flow hole through which liquid flows.

According to the above embodiment, when the furnace body rotates and the material to be processed is stirred by the stirring blade, the liquid generated from the material to be processed is formed in the portion of the first stirring blade fixed to the wall surface of the furnace body. The liquid flows through the formed liquid passage hole and is guided to the lower part of the furnace body along the inner wall surface of the furnace body. Therefore, the liquid can be efficiently discharged from the furnace body.

In one embodiment of the waste treatment apparatus, the heating device has a heating chamber surrounding the side surface of the furnace body, and a burner that emits flame into the heating chamber.

According to the above embodiment, the side surfaces of the rotating furnace body can be efficiently and stably heated by radiating flames from the burners into the heating chamber surrounding the side surfaces of the furnace body. can be heated stably and stably.

In one embodiment of the waste treatment apparatus, a tapered portion having an inner diameter that decreases toward the opening is formed at one end portion of the furnace body, and the furnace body is formed on the inner wall surface of the tapered portion. When the furnace body rotates, the object to be processed is fed axially inward from the opening of the furnace body. A helical vane is provided that is configured to feed toward the opening.

According to the above embodiment, when the object to be processed is put into the furnace body, the object to be processed is put into the tapered portion through the opening on one end side of the furnace body, and the furnace body is rotated forward. As a result, the object to be processed is conveyed axially inward from the opening by the spiral blades provided in the tapered portion. On the other hand, when the object to be processed in the furnace body is discharged, the object to be processed is sent from the inner side in the axial direction toward the opening by the spiral blades provided in the tapered portion by rotating the furnace body in the reverse direction. and discharged from the opening. In this way, by switching the rotation direction of the furnace body, it is possible to easily load and unload the material to be processed.

The waste treatment plant of the present invention comprises the above waste treatment device,
a superheated steam boiler that generates superheated steam to be supplied to the superheated steam supply unit of the waste treatment device;
a cooling device for cooling the gas and liquid guided from the gas-liquid discharge part of the waste treatment device;
an oil-water separator for separating the liquid introduced from the cooling device into oil and water;
and an oil tank for storing the oil separated by the oil-water separator.

According to the above configuration, the superheated steam boiler generates superheated steam to be supplied to the superheated steam supply unit of the waste treatment device, and the cooling device cools the gas and liquid introduced from the gas-liquid discharge part of the waste treatment device. , the liquid led from this cooling device is separated into oil and water by an oil-water separator, and the oil separated by this oil-water separator is stored in an oil tank. With such a relatively small number of devices, it is possible to treat the waste, which is the material to be treated, and extract the oil, which is a useful material.

A waste treatment plant in one embodiment includes a dechlorination device upstream of the cooling device for removing chlorine contained in the gas and liquid led from the gas-liquid discharge section of the waste treatment device.

According to the above embodiment, chlorine contained in the gas and liquid led from the gas-liquid discharge section of the waste treatment device is removed by the dechlorination device, and extracted via the downstream cooling device and oil-water separation device. With respect to the oil treated, the dioxin problem can be prevented when this oil is used as fuel.

The waste treatment plant of one embodiment uses the oil in the oil tank as fuel for the superheated steam boiler.

According to the above embodiment, by using the oil obtained by treating the waste as fuel for the boiler for generating superheated steam, it is possible to reduce the amount of fuel input from the outside in order to recycle the waste as a resource. . Therefore, it is possible to effectively reduce the load on the environment.

BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view which shows the waste disposal apparatus of embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a front view of the waste disposal apparatus of embodiment. 1 is a cross-sectional view of the waste disposal apparatus of the embodiment taken along the line AA. FIG. It is a BB line cross-sectional view of the waste disposal apparatus of embodiment. 1 is a block diagram of a waste plant according to an embodiment of the invention; FIG.

The present invention will be described in detail below with reference to the illustrated embodiments.

FIG. 1 is a vertical cross-sectional view showing the waste disposal apparatus of the embodiment, and FIG. 2 is a front view of the waste disposal apparatus of the embodiment. 3 is a cross-sectional view along line AA of FIG. 1, and FIG. 4 is a cross-sectional view along line BB of FIG.

In the waste treatment apparatus of this embodiment, waste in which synthetic resin-based waste and plant-based waste are mixed is input as an object to be treated, and the input object to be treated is melted, vaporized, decomposed, and carbonized. Alternatively, it is dry-distilled to produce liquid fuel and charcoal, which are useful materials.

This waste treatment apparatus 1 is provided with a substantially cylindrical furnace body 2 that is arranged with a central axis C directed horizontally and that is rotationally driven around the central axis C. As shown in FIG. The furnace body 2 is formed with an opening 2a for taking in and out the object to be processed at one end, and is provided with an opening/closing door 3 for opening and closing the opening 2a. A heat-resistant packing is installed between the open/close door 3 and the opening 2a, and a hinge attached to one edge of the opening 2a when viewed from the front causes the open/close door 3 to swing and close the opening 2a. formed to open and close. When the opening 2a is closed, the opening/closing door 3 is fixed to the furnace body 2 by a plurality of bolts attached to the edge of the opening/closing door 3 to seal the opening 2a. The opening 2a is opened when the object to be treated is introduced and when the residue of the object to be treated is discharged, and is closed when the object to be treated is treated.

The furnace body 2 has a tapered portion 2b formed at one end thereof, the inner diameter of which decreases toward the opening 2a. A cylindrical portion 2 c having a cylindrical shape is formed on the other end side of the tapered portion 2 b of the furnace body 2 . The furnace chamber 10 inside the furnace body 2 includes an input/discharge chamber 10a positioned inside the tapered portion 2b of the furnace body 2, a stirring chamber 10b positioned inside and on one end side of the cylindrical portion 2c, and a cylindrical portion 2c. It has a gas-liquid circulation chamber 10c located inside and on the other end side. The material to be processed passes through the input/discharge chamber 10a when the material to be processed is input or discharged. The stirring chamber 10b communicates with the other end of the input/discharge chamber 10a, and stirs the material to be processed that has been input. The gas-liquid circulation chamber 10c is located on the other end side of the stirring chamber 10b, is supplied with superheated steam from the outside, and discharges the liquid and gas in the furnace chamber 10 to the outside. The stirring chamber 10b and the gas-liquid circulation chamber 10c are partitioned by a partition wall 11, which will be described in detail later.

A spiral blade 17 is provided on the inner wall surface of the tapered portion 2 b of the furnace body 2 . The spiral blade 17 is formed to move the object to be processed from one end of the furnace body 2 to the other end or from the other end to the one end according to the rotation direction of the furnace body 2 . Specifically, when the furnace body 2 rotates forward in the direction indicated by the arrow R1, the object to be processed is sent axially inward from the opening 2a. On the other hand, when the furnace body 2 reversely rotates in the direction indicated by the arrow R2, the object to be processed is fed from the inner side of the furnace body 2 in the axial direction toward the opening 2a. As a result, the material to be processed is introduced from the opening 2a of the furnace body 2, and when the furnace body 2 is rotated forward, the material to be processed is sent from the charging/discharging chamber 10a toward the stirring chamber 10b. On the other hand, when the processing of the object to be processed is completed and the furnace body 2 is reversely rotated, the object to be processed is sent from the stirring chamber 10b toward the charging/discharging chamber 10a and discharged from the opening 2a.

In the gas-liquid circulation chamber 10c formed on the other end side inside the cylindrical portion 2c of the furnace body 2, a superheated steam supply opening 6a as a superheated steam supply section for supplying superheated steam to the inside of the furnace body 2 is provided. It is provided on the other end side of the furnace body 2 . Further, in the gas-liquid circulation chamber 10c, a gas-liquid discharge pipe 7 as a gas-liquid discharge section for discharging at least one of the gas and the liquid in the furnace body 2 is provided on the other end side of the furnace body 2. . The superheated steam supply opening 6 a is formed in a rotary joint 5 attached to the other end surface of the furnace body 2 . Also, the gas-liquid discharge pipe 7 is connected to the rotary joint 5 . The gas-liquid discharge pipe 7 has a horizontal portion extending along the central axis C from the connecting portion of the rotary joint 5 and a vertical portion extending downward from the horizontal portion. The lower end of the vertical portion of the gas-liquid discharge pipe 7 is open facing the inner wall surface of the lower portion of the furnace body 2 .

A superheated steam pipe 6 for introducing superheated steam from a superheated steam boiler 51, which will be described in detail later, is connected to the outer portion of the furnace body 2 of the rotary joint 5. As shown in FIG. The superheated steam guided by the superheated steam pipe 6 flows through the rotary joint 5 and is discharged from the superheated steam supply opening 6a into the gas-liquid circulation chamber 10c. The superheated steam introduced into the furnace body 2 is set to a temperature in the range of over 100° C. to 600° C. or less depending on the type of waste. For example, plant waste such as wood chips and grass can be carbonized by setting the temperature of the superheated steam to 250° C. or higher. Moreover, by setting the temperature of the superheated steam to 160° C. or higher, the infectious waste discharged from medical institutions can exhibit its disinfection and sterilization effect and can be rendered harmless. In addition, synthetic resin waste such as waste plastic can be recovered by melting and liquefying or vaporizing the synthetic resin by setting the temperature to the melting point or higher depending on the type of synthetic resin. .

A gas-liquid conduit 8 is connected to the rotary joint 5 outside the furnace body 2 to guide the gas and liquid discharged from the furnace body 2 to a catalyst device 57, which will be described later. Gas and liquid sucked from the gas-liquid circulation chamber 10c through the gas-liquid discharge pipe 7 flow through the rotary joint 5 and are guided to the gas-liquid conduit 8. As shown in FIG.

The rotary joint 5 is arranged to face the inside and the outside of the furnace body 2, and includes a rotating part fixed to the furnace body 2 and rotating together with the furnace body 2, the superheated steam pipe 6, the gas-liquid discharge pipe 7, and the gas. It has a stationary part to which the liquid conduit 8 is fixed and stationary. A superheated steam supply opening 6a is formed on the surface of the stationary component facing the gas-liquid circulation chamber 10c. A bearing and a seal are provided between the rotating part and the stationary part of the rotary joint 5 so that the furnace body 2 can rotate while the furnace body 2 is sealed.

A plurality of stirring blades 12, 12, 12, . is fixed. The stirring blades 12 are formed so as to extend substantially parallel to the central axis C of the furnace body 2 when viewed in vertical cross section, and to extend substantially in the radial direction of the furnace body 2 when viewed in cross section. The stirring blades 12 are composed of a first stirring blade 13 positioned substantially in the center of the stirring chamber 10b in the central axis direction of the furnace body 2, and two second stirring blades 14, 14 positioned on both sides of the first stirring blade 13. have

The first stirring blade 13 has a rectangular shape elongated in a direction parallel to the central axis C, as shown in FIG. The first stirring blade 13 is formed with a plurality of slit-shaped fluid flow holes 13a, 13a, 13a extending parallel to the central axis C in a portion fixed to the inner wall surface of the furnace body 2. As shown in FIG. When the furnace body 2 rotates and the stirring blades 12 stir the material to be processed, the fluid flow holes 13a allow the liquid generated from the material to be circulated to flow along the inner wall surface of the furnace body 2. It is designed to lead to the lower part of the body 2 . The edge of the first stirring blade 13 on the side of the central axis C is bent with respect to the radial direction, as shown in the cross-sectional view of FIG. As shown in FIG. 3, the direction in which the curved portion of the edge of the first stirring blade 13 is curved is formed so as to sequentially face the opposite side in the circumferential direction. As the furnace body 2 rotates, the first stirring blade 13 lifts the object to be processed upward and drops it from a predetermined height. In addition, since the bent portion of the edge of the first stirring blade 13 sequentially faces the opposite side in the circumferential direction, even if the furnace body 2 rotates in either the forward direction or the reverse direction, the object to be processed can be effectively stirred. It is designed to be lifted and dropped.

As shown in FIG. 1, the second stirring blade 14 is formed in a trapezoidal shape with an inclined edge on the central axis C side. As shown in FIG. 1, the two second stirring blades 14 arranged on both sides of the first stirring blade 13 are arranged so that the edge on the side of the central axis C approaches the central axis C as the distance from the first stirring blade 13 increases. are placed. That is, the two second stirring blades 14 are arranged such that the radial dimension thereof increases with increasing distance from the first stirring blade 13 . With these two second stirring blades 14, as the furnace body 2 rotates, the object to be processed is lifted upward and dropped from a predetermined height onto the first stirring blade 13 side. As a result, the object to be processed in the stirring chamber 10b moves from the second stirring blade 14 toward the first stirring blade 13 as indicated by the arrow F. In this way, the first stirring blade 13 and the second stirring blade 14 effectively stir the material to be processed and collect the material toward the center of the stirring chamber 10b. As a result, the object to be processed is brought into contact with the superheated steam introduced into the stirring chamber 10b efficiently, and the heat of the burner 22 that heats the central portion of the stirring chamber 10b is efficiently applied to the object to be processed. It's becoming

The partition wall 11 that partitions the stirring chamber 10b and the gas-liquid circulation chamber 10c, as shown in the cross-sectional view of FIG. A circular perforated plate 16 is fixed to the inner diameter side of this outer diameter side partition plate 15 . To the surface of the outer diameter side partition plate 15 on the side of the stirring chamber 10b, the edge of the second stirring blade 14 on the side where the dimension in the radial direction is formed to be large is fixed. A plurality of liquid circulation holes 15a, 15a, 15a, . . . The liquid circulation hole 15a extends in the outer diameter side partition plate 15 in an arc shape from the fixed position of the second stirring blade 14 toward the forward rotation direction of R1, and is located between the adjacent second stirring blades 14. It is formed with a length corresponding to 60-70% of the arc. As a result, when the stirring blade 12 lifts the object to be processed, the liquid flowing out from the object to be processed positioned above the stirring blade 12 and the inner wall surface of the furnace body 2 is effectively gas-liquid through the liquid flow hole 15a. It can lead to the flow chamber 10c. The perforated plate 16 is formed with a plurality of gas flow holes 16a, 16a, 16a, . Through this gas circulation hole 16a, the superheated steam supplied from the superheated steam supply opening 6a to the gas-liquid circulation chamber 10c is guided from the gas-liquid circulation chamber 10c to the stirring chamber 10b. Further, the gas generated by vaporization or carbonization of the material to be processed is led from the stirring chamber 10b to the gas-liquid communication chamber 10c through the gas communication hole 16a.

A burner 22 for heating the furnace body 2 is arranged outside and below the furnace body 2 . The burner 22 burns kerosene as fuel and emits flame, and is formed to emit flame into the heating chamber 21 formed to surround the furnace body 2 . The heating chamber 21 is formed inside a heat insulating wall 20 arranged to surround the substantially central portion of the cylindrical portion 2 c of the furnace body 2 . At least the inner wall surface of the heat insulating wall 20 is made of a castable refractory material. The heat insulating wall 20, the heating chamber 21 and the burner 22 constitute a heating device. This heating device heats the air in the heating chamber 21 to approximately 200 to 500° C. by means of the burner 22, thereby heating substantially the center of the cylindrical portion 2c of the furnace body 2, thereby heating the stirring chamber 10b in the furnace body 2. is effectively raised. By heating the furnace body 2 with this heating device, the material to be processed that is stirred in the stirring chamber 10b is effectively melted, vaporized, decomposed, carbonized, or carbonized.

This waste disposal apparatus 1 includes a driving device for rotating the furnace body 2 . This driving device includes two guide rails 25, 25 fixed to the outer surface of the furnace body 2, and is arranged below the furnace body 2 so as to rotate the furnace body 2 in contact with the peripheral surface of the guide rail 25. It has a plurality of support rollers 34 , 34 , 34 , 34 for supporting and a plurality of guide rollers 26 , 26 , 26 , 26 for guiding the guide rail 25 . As shown in FIG. 4 , the support rollers 34 are arranged on both sides of the lowermost end of the guide rail 25 when viewed in the central axis direction, and two rollers are arranged for each guide rail 25 . Two guide rollers 26 , 26 are arranged at the lowermost end of the guide rail 25 so as to be in contact with the side surfaces on both sides of the guide rail 25 in the traveling direction. As shown in FIG. 1, the guide rollers 26, 26 rotate on both sides of the guide rail 25 so as to regulate the movement of the furnace body 2 to which the guide rail 25 is fixed in the central axis C direction. It has become. The drive device of the waste treatment apparatus 1 includes a sprocket 30 fixed to the other end of the furnace body 2 concentrically with the central axis C, a chain 31 wound around the sprocket 30, and a chain 31 wound around the sprocket 30. It has a motor 32 which drives a sprocket which is turned and connected to the output shaft. Rotational force of the motor 32 is transmitted to the sprocket 30 via the chain 31 to rotate the furnace body 2 around the central axis C.

FIG. 5 is a block diagram showing a waste treatment plant 50 constructed using this waste treatment apparatus 1. As shown in FIG. The waste treatment plant 50 includes the waste treatment 1, a superheated steam generator 51 that generates superheated steam to be supplied to the waste treatment 1, and a steam boiler that generates the steam to be supplied to the superheated steam generator 51. 52. The steam boiler 52 is connected to a water supply device 53 that softens tap water and supplies soft water, a kerosene tank 54 that stores kerosene as fuel, and a recycled oil tank 55 that stores recycled oil as fuel. The steam boiler 52 heats the soft water supplied from the water supply device 53 with the heat of burning the kerosene from the kerosene tank 54 and the reclaimed oil from the reclaimed oil tank 55 to generate steam. The steam generated by the steam boiler 52 is further heated by the superheated steam generator 51 to generate superheated steam. Thus, the superheated steam generator 51 and the steam boiler 52 constitute the superheated steam boiler of the present invention. In this waste treatment plant 50, a steam boiler 52 that constitutes a superheated steam boiler uses recycled oil produced from waste by this waste treatment plant 50 as part of its fuel. Therefore, it is possible to reduce the amount of fuel to be input from the outside in order to recycle the waste as a resource. This makes it possible to effectively reduce the load on the environment. The kerosene in the kerosene tank 54 is supplied to the steam boiler 52 and also to the burner 22 of the waste disposal apparatus 1 as indicated by arrow K. As shown in FIG.

This waste treatment plant 50 comprises a catalyst treatment device 57 to which the liquid and gas discharged from the waste treatment device 1 through the gas-liquid conduit 8 are introduced. This catalyst treatment device 57 mixes the liquid and gas from the waste treatment device 1 with a catalyst to perform a dechlorination reaction to remove chlorine. As the catalyst, platinum, palladium, ruthenium, rhodium, or the like supported on carbon, silica, or the like can be used. Thus, the catalytic treatment device 57 functions as a dechlorination device. Instead of the catalyst treatment device 57, a dechlorination device that removes chlorine by other methods such as temperature control and electron beam irradiation may be provided.

The downstream side of the catalytic treatment device 57 is connected to a cooler 58 for cooling the dechlorinated liquid and gas. This cooler 58 cools the liquid and gas from the catalytic treatment device 57 and liquefies the oil and fat components and water contained in the gas. Cooling water is supplied to the cooler 58 from a cooling tower (not shown). The gas remaining after being cooled by the cooler 58 is led to the activated carbon adsorption device 59 connected downstream. The activated carbon adsorption device 59 circulates gas between the activated carbons to adsorb dust and harmful substances contained in the gas to the activated carbons. The gas from which dust and harmful substances have been removed by the activated carbon adsorption device 59 is released into the atmosphere and exhausted.

The liquid led from the cooler 58 is a mixture of the liquid extracted by the waste treatment device 1 and the liquid liquefied by the cooler 58, and contains oil and water. This liquid is led to an oil-water separator 60 connected downstream of the cooler 58 and separated into water and oil by the oil-water separator 60 . The water separated by the oil-water separator 60 is guided to the adsorption device 61 connected downstream. The oil separated by the oil-water separator 60 is led to an oil tank 62 connected downstream. The water led to the adsorption device 61 adsorbs and removes trace amounts of oil remaining in the water. Used filters and adsorbents used for oil adsorption are put into the waste disposal apparatus 1 and regenerated.

An oil tank 62 that stores the oil separated by the oil-water separator 60 is connected to the downstream side of the oil-water separator 60 . The oil stored in this oil tank 62 is used for various purposes as regenerated oil. Part of the reclaimed oil stored in the oil tank 62 is supplied to the reclaimed oil tank 55 by the pump P and used as part of the fuel for the steam boiler 52 .

The waste treatment apparatus 1 and the waste treatment plant 50 configured as described above operate as follows.

First, the open/close door 3 of the waste disposal apparatus 1 is opened to open the opening 2a, and the material to be treated, which is a mixture of synthetic resin waste and plant waste, is introduced through the opening 2a. be done. The object to be processed is fed from the opening 2a into the feeding/discharging chamber 10a by a screw conveyor 39 whose tip end is inserted. When the material to be processed is completely loaded, the opening/closing door 3 is closed to close the opening 2a. When the opening 2a is closed, the motor 32 is activated, the rotational force of the motor 32 is transmitted to the sprocket 30 via the chain 31, and the furnace body 2 is started to rotate. The furnace body 2 is rotationally driven in the forward direction about the central axis C as indicated by the arrow R1 during the treatment of waste. When the furnace body 2 is rotationally driven in the forward direction, the material to be treated that has been charged is sent from the charging/discharging chamber 10a to the stirring chamber 10b by the action of the spiral blade 17. As shown in FIG. The object to be processed sent to the stirring chamber 10b is stirred by the stirring blades 12 as the furnace body 2 rotates. The object to be processed is lifted by the first stirring blades 13 of the stirring blades 12 and dropped from a predetermined height. The object to be processed is lifted by the second stirring blades 14 of the stirring blades 12 and dropped from a predetermined height toward the first stirring blades 13 . This promotes stirring of the object to be processed in the stirring chamber 10b.

As the furnace body 2 of the waste treatment apparatus 1 starts rotating, the steam boiler 52 and the superheated steam generator 51 start operating, and the superheated steam is introduced from the superheated steam generator 51 to the waste treatment apparatus 1 . The superheated steam introduced from the superheated steam generator 51 is introduced into the rotary joint 5 through the superheated steam pipe 6 and discharged into the gas-liquid circulation chamber 10c in the furnace body 2 from the superheated steam supply opening 6a. The superheated steam in the gas-liquid circulation chamber 10c is led to the stirring chamber 10b through the gas circulation holes 16a, 16a, 16a, . do.

At the same time as the furnace body 2 of the waste treatment apparatus 1 starts to rotate, the burner 22 is ignited and the radiation of flame into the heating chamber 21 is started. The heat of the heating chamber 21 heats the outer wall surface of the rotating furnace body 2 and heats the stirring chamber 10 b inside the furnace body 2 .

The object to be treated, which is stirred by the stirring blades 12 in the furnace body 2 of the waste treatment apparatus 1, comes into contact with the superheated steam while the supply of oxygen is cut off, and is heated by the burner 22 to produce a synthetic resin. Melting and vaporization of wastes are promoted, and dry distillation and carbonization of plant wastes are promoted. Along with this, the liquid generated from the material to be processed is guided to the lower part of the furnace body 2 through the fluid flow holes 13a of the first stirring blades 13, and also through the liquid flow holes 15a of the outer diameter side partition plate 15. is led to the gas-liquid circulation chamber 10c. At the same time, the gas generated from the object to be processed is guided to the gas-liquid circulation chamber 10c through the gas circulation holes 16a, 16a, 16a, . The liquid and gas introduced into the gas-liquid circulation chamber 10c are sucked from the opening at the lower end of the gas-liquid discharge pipe 7 by the pressure inside the furnace body 2, which is higher than the atmospheric pressure as the superheated steam is supplied, It is discharged from the gas-liquid conduit 8 as indicated by the arrow L.

This waste treatment apparatus 1 can switch the rotation direction of the stirring blade 12 when treating the material to be treated. For example, when an object to be processed is put in, the furnace body 2 is driven in the forward rotation direction of arrow R1 to agitate the object to be processed by the stirring blades 12, and after a predetermined time has elapsed, the rotation direction of the furnace body 2 is changed to reverse rotation direction. After performing this reverse rotation operation for a predetermined time, the rotating direction of the furnace body 2 is returned to the forward rotation. By changing the rotation direction of the furnace body 2 in this way, it is possible to prevent the problem that the object to be processed stays in the furnace body 2 and the problem that the degree of stirring is uneven. As a result, the object to be processed can be uniformly heated, and the object to be processed can be effectively melted, vaporized, or carbonized. Here, it is preferable that the period during which the furnace body 2 continues to rotate in the reverse direction is shorter than the period in which it continues to rotate in the forward direction. Moreover, the reverse rotation of the furnace body 2 may be performed at any time during the entire treatment period.

The liquid and gas discharged from the waste treatment apparatus 1 through the gas-liquid conduit 8 along with the treatment of the material to be treated in the furnace body 2 are led to the catalyst treatment apparatus 57 to remove chlorine, and then cooled. It is led to vessel 58 and cooled. When the gas is cooled and liquefied by the cooler 58, it is led to the oil-water separator 60 together with other liquids. Oil separated from water by the oil-water separator 60 is guided to an oil tank 62 and stored as reclaimed oil.

After being cooled by the cooler 58, the remaining gas is removed of dust and harmful substances by the activated carbon adsorption device 59, and is discharged into the atmosphere.

Water from which a small amount of oil has been removed by the adsorption device 61 is discharged to the outside.

When the treatment by the waste treatment apparatus 1 is completed, the rotation of the furnace body 2 is stopped, the supply of superheated steam to the furnace body 2 is stopped, and the heating of the furnace body 2 by the burners 22 is stopped. After that, the door 3 of the furnace body 2 is opened to open the opening 2a, and the furnace body 2 is reversely rotated in the direction indicated by the arrow R2. As a result, the material to be processed is sent from the stirring chamber 10b toward the input/discharge chamber 10a by the spiral blade 17 and discharged from the opening 2a. A residue collection container 37 is arranged below the opening 2a, and the material discharged from the opening 2a is dropped into the residue collection container 37 as indicated by an arrow G. The object to be treated recovered in the residue recovery container 37 is the residue remaining after the waste is treated by the waste treatment apparatus 1, and is composed of charcoal and incombustibles. Charcoal is extracted by removing incombustibles from this residue.

In this way, the waste treatment plant 50 of the present embodiment treats the material to be treated using superheated steam in the waste treatment apparatus 1, thereby reducing the size of the equipment from conventional waste to useful substances. can be taken out. Therefore, it becomes possible to install and operate a waste treatment plant at a lower cost than before, and as a result, it becomes possible to introduce it to small-scale local governments and business establishments.

Moreover, since the waste treatment plant 50 of the present embodiment is configured with a relatively small number of devices, it can be mounted on a large trailer, for example, to configure a mobile plant. As a result, the waste treatment plant 50 can be installed at the event site to treat the waste generated at the event on site. Also, a waste treatment plant 50 can be installed on a remote island where a large amount of waste plastic has washed ashore, and the waste plastic can be treated there.

Moreover, the waste treatment apparatus 1 of the present embodiment can effectively and efficiently detoxify medical waste by setting the superheated steam applied to the object to be treated to 160° C. or higher. Therefore, by installing the waste treatment apparatus 1 or the waste treatment plant 50 in various medical institutions, medical waste can be detoxified and recycled locally.

In the above-described embodiment, the waste treatment apparatus 1 is provided with the input/discharge chamber 10a inside the tapered portion 2b of the furnace body 2, and the spiral blade 17 is provided on the inner wall surface of the tapered portion 2b. Although the object to be processed is discharged by action, the tapered portion 2b, the input/discharge chamber 10a, and the spiral blade 17 may not necessarily be provided. That is, the furnace body 2 may be provided with only the stirring chamber 10b and the gas-liquid circulation chamber 10c. In this case, the furnace body 2 is formed in a cylindrical shape, an opening 2a is provided in the end face of one end side of the cylindrical furnace body 2, and the material to be processed is introduced and discharged by a screw conveyor through this opening 2a. . When the material to be treated is to be discharged, a hopper is provided at the end of the screw conveyor, and the furnace body 2 is driven to rotate while the hopper is inserted into the stirring chamber 10b in the furnace body 2. FIG. The object to be treated lifted by the stirring blades 12 due to the rotation of the furnace body 2 may be received by a hopper and discharged by a screw conveyor.

The present invention is not limited to the embodiments described above, and many modifications are possible within the technical concept of the present invention by those skilled in the art.

REFERENCE SIGNS LIST 1 waste treatment device 2 furnace body 2a opening 2b tapered portion 2c cylindrical portion 3 open/close door 5 rotary joint 6 superheated steam pipe 6a superheated steam supply opening 7 gas-liquid discharge pipe 8 gas-liquid conduit 10 furnace chamber 10a input/discharge chamber 10b Stirring chamber 10c gas-liquid circulation chamber 11 partition wall 12 stirring blade 13 first stirring blade 13a fluid flow hole 14 second stirring blade 15 outer diameter side partition plate 15a liquid flow hole 16 perforated plate 16a gas flow hole 17 spiral blade 20 heat insulation Wall 21 Heating Chamber 22 Burner 25 Guide Rail 26 Guide Roller 30 Sprocket 31 Chain 32 Motor 34 Support Roller 50 Waste Treatment Plant 51 Superheated Steam Generator 52 Steam Boiler 53 Water Supply Device 54 Kerosene Tank 55 Recycled Oil Tank 57 Catalytic Treatment Device 58 Cooling vessel 59 activated carbon adsorption device 60 oil-water separator 61 adsorption device 62 oil tank C central axis

Claims (11)

a generally cylindrical furnace body that is rotationally driven with its central axis directed horizontally;
an opening formed at one end of the furnace body, opened and closed by an opening/closing door, and used for loading and unloading the material to be processed;
a superheated steam supply unit installed on the other end side of the furnace body for supplying superheated steam contacting the object to be processed to the inside of the furnace body;
a gas-liquid discharge unit installed on the other end side of the furnace body for discharging at least one of gas and liquid in the furnace body;
a stirring blade installed on the inner wall surface of the furnace body for stirring the object to be processed as the furnace body rotates;
a heating device for heating the outer wall surface of the furnace body;
and a driving device for rotating the furnace body. In the waste disposal device according to claim 1,
Inside the furnace body, a stirring chamber in which the stirring blade is arranged and a gas-liquid circulation chamber in which the superheated steam supply unit and the gas-liquid discharge unit are provided are formed,
A partition wall for partitioning the stirring chamber and the gas-liquid circulation chamber has a gas circulation hole for circulating the superheated steam and the gas between the gas-liquid circulation chamber and the stirring chamber, and a gas-liquid circulation for the liquid from the stirring chamber. A waste disposal device characterized by having a liquid flow hole for flowing into a chamber. In the waste disposal device according to claim 1,
The superheated steam supplied by the superheated steam supply unit and the gas and liquid discharged by the gas-liquid discharge unit flow through a rotary joint arranged on the central axis of the end face of the furnace body. A waste disposal device characterized by: In the waste disposal device according to claim 3,
The waste treatment apparatus, wherein the gas-liquid discharge section has a discharge pipe extending downward inside the furnace body from the rotary joint and having a lower end opened toward the inner wall surface of the furnace body. In the waste disposal device according to claim 1,
The stirring blade has a first stirring blade located substantially in the center in the central axis direction of the furnace body and a second stirring blade located on both sides of the first stirring blade,
The first stirring blade is formed to lift the object to be processed upward with the rotation of the furnace body and drop it from a predetermined height,
The second stirring blade is formed so as to lift the object to be processed upward with the rotation of the furnace body, drop it from a predetermined height, and move it toward the first stirring blade. and waste disposal equipment. In the waste disposal device according to claim 5,
A waste treatment apparatus, wherein a portion of the first stirring blade fixed to the inner wall surface of the furnace body is formed with a liquid flow hole through which liquid flows. In the waste disposal device according to claim 1,
A waste treatment apparatus, wherein the heating device has a heating chamber surrounding the side surface of the furnace body, and a burner for emitting a flame into the heating chamber. In the waste disposal device according to claim 1,
A tapered portion having an inner diameter that decreases toward the opening is formed at one end side portion of the furnace body, and the inner wall surface of the tapered portion is adapted to move the object to be processed when the furnace body rotates forward. It is formed so as to feed the object to be processed axially inwardly from the opening of the furnace body, and to feed the object to be processed from the axially inner side of the furnace body toward the opening when the furnace body rotates in the reverse direction. A waste disposal device, characterized in that a spiral blade is provided. A waste disposal device according to claim 1;
a superheated steam boiler that generates superheated steam to be supplied to the superheated steam supply unit of the waste treatment device;
a cooling device for cooling the gas and liquid guided from the gas-liquid discharge part of the waste treatment device;
an oil-water separator for separating the liquid introduced from the cooling device into oil and water;
A waste treatment plant, comprising: an oil tank for storing the oil separated by the oil-water separator. In the waste treatment plant according to claim 9,
A waste treatment plant comprising, upstream of said cooling device, a dechlorination device for removing chlorine contained in the gas and liquid led from said gas-liquid discharge section of said waste treatment device. In the waste treatment plant according to claim 9,
A waste treatment plant, wherein the oil in the oil tank is used as fuel for the superheated steam boiler.

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