JP2014156544A - Manufacturing apparatus and manufacturing method of carbonized material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing apparatus of a carbonized material capable of enhancing the amount of heat transferred within a pyrolyzing furnace without entailing the proliferation of the cooling capacity of an oil recovery device or the heating capacity of a gas heating device.SOLUTION: A manufacturing apparatus 1 of a carbonized material is constituted by configuring a reactor 13 within a pyrolyzing furnace 10 possessing an internal space in which raw ingredients including a polymeric organic compound can be stored. This reactor 13 possesses an introduction port 13a for introducing a gas and a discharge port 13b for discharging the gas. A gas targeted for pyrolysis is circulated through the interior of the pyrolyzing furnace 10 from the introduction port 13a to discharge port 13b of the reactor 13 within the pyrolyzing furnace 10.

Description

  The present invention relates to a carbonized material manufacturing apparatus and method for pyrolyzing a raw material containing a polymer organic compound to obtain a carbonized material, and separating and recovering oil from a pyrolysis gas generated during the thermal decomposition.

  With regard to the disposal of waste products such as tires containing high molecular organic compounds, there has been increasing interest from the viewpoint of recent global environmental conservation, waste reduction, and recycling. Based on this situation, using carbonaceous organic compound waste as a raw material, the raw material is heated and thermally decomposed in a non-oxidizing atmosphere to produce a carbonized carbon material that becomes carbon black. Research and development are being conducted to separate and recover oil from the pyrolysis gas generated inside.

  Conventional carbonized material production equipment that uses waste containing high-molecular-weight organic compounds as a raw material includes a pyrolysis furnace that thermally decomposes waste containing high-molecular-weight organic compounds and heat generated from the pyrolysis furnace during thermal decomposition. It has a basic configuration including an oil content recovery device that cools the cracked gas to separate and recover the oil content, and an inert gas supply device for making the furnace atmosphere of the pyrolysis furnace non-oxidizing.

  Regarding the carbonized material manufacturing equipment with a gas heating device in the middle of the pipe connecting the oil recovery device and the pyrolysis furnace, the pyrolysis gas generated from the pyrolysis furnace is guided to the heat exchanger, There exists what heats residual gas by sensible heat (patent document 1).

JP 2012-001703 A

  In the carbonized material manufacturing equipment with a gas heating device in the middle of the pipe connected to the oil recovery device and the pyrolysis furnace, per soaking of the in-furnace material and one pyrolysis treatment immediately after the start of heating In order to increase the amount of heat transferred in the pyrolysis furnace due to an increase in the amount of treatment, it is necessary to increase the flow rate of the heated gas introduced into the pyrolysis furnace. However, in order to increase the flow rate of the heated gas, it is necessary to increase both the cooling capacity of the oil recovery device in accordance with the increased gas flow rate and the heating capability of the gas heating device. Increases energy consumption.

  The present invention has been made in order to advantageously solve the above-described problem, and the heat transfer in the pyrolysis furnace without causing an increase in the cooling capacity of the oil recovery device or an increase in the heating capacity of the gas heating device. It aims at providing the manufacturing apparatus and manufacturing method of the carbonized material which can increase the quantity.

  An apparatus for producing a carbonized material according to the present invention is a method in which a carbonized material is obtained by pyrolyzing the raw material in a reactor provided in a pyrolysis furnace having an internal space capable of containing a raw material containing a high molecular weight organic compound. An apparatus for manufacturing, wherein the reactor has an inlet for introducing gas and an outlet for discharging gas, and in the pyrolysis furnace through the inlet and outlet of the reactor in the pyrolysis furnace. Gas is circulated inside the pyrolysis furnace.

  The method for producing a carbonized material of the present invention is a method in which a carbonized material is obtained by pyrolyzing the raw material in a reactor provided in a pyrolysis furnace having an internal space capable of containing a raw material containing a high molecular organic compound. In the pyrolysis furnace, the gas in the pyrolysis is heated through the inlet and the outlet of the reactor having an inlet for introducing gas and an outlet for discharging gas. It is characterized by being circulated inside the cracking furnace.

  According to the present invention, a reactor is provided in the pyrolysis furnace, and the gas in the pyrolysis circulates in the pyrolysis furnace through the inlet and outlet of the reactor. The gas flow rate can be increased. For this reason, the amount of heat transfer in the pyrolysis furnace can be increased without causing an increase in the cooling capacity of the oil recovery device or an increase in the heating capacity of the gas heating device.

It is a schematic diagram of one embodiment of the present invention. It is a schematic diagram of another embodiment of this invention. It is a graph which shows the time-dependent change of the temperature in a pyrolysis furnace.

  Hereinafter, embodiments of the carbonized material manufacturing apparatus and method of the present invention will be described more specifically with reference to the drawings.

  A carbonized material manufacturing apparatus 1 according to an embodiment of the present invention schematically shown in FIG. 1 includes a pyrolysis furnace 10 that pyrolyzes a raw material containing a polymer organic compound to obtain a carbonized material, and a pyrolysis furnace 10. An inert gas supply device 11 as a supply source for supplying an inert gas, and a condenser as an oil recovery device that cools the pyrolysis gas generated from the pyrolysis furnace 10 and separates and recovers the oil in the pyrolysis gas. 20.

  The inert gas supply device 11 is connected to the pyrolysis furnace 10 via a gas pipe 12. The inert gas supplied from the inert gas supply device 11 is, for example, nitrogen gas, and commercially available nitrogen gas can be used. In addition, argon gas or the like can be used. Before the pyrolysis of the raw material containing the polymer organic compound in the pyrolysis furnace 10, air is supplied from the pyrolysis furnace 10 by supplying an inert gas from the inert gas supply device 11 into the pyrolysis furnace 10. The inside of the furnace can be made into a non-oxidizing atmosphere suitable for thermal decomposition. It is also possible to supply an inert gas from the inert gas supply device 11 into the pyrolysis furnace 10 during the pyrolysis process of the raw material in the pyrolysis furnace 10. By supplying an inert gas into the pyrolysis furnace 10 during the pyrolysis treatment, the gas flow rate in the pyrolysis furnace 10 can be increased, thereby promoting the pyrolysis. However, in the present embodiment, as will be described later, a fan 15 is provided in the pyrolysis furnace 10, and the gas in the pyrolysis furnace 10 is caused to flow by the fan 15, thereby increasing the flow rate of the gas in the furnace. Therefore, it is not always necessary to supply the inert gas into the thermal decomposition furnace 10 during the thermal decomposition process, and the supply of the inert gas may be stopped during the thermal decomposition process.

  In the furnace space 10 a of the pyrolysis furnace 10, in the illustrated embodiment, a reactor 13 in which a raw material containing a polymer organic compound is accommodated is provided. The reactor 13 has an inlet 13a for introducing gas and an outlet 13b for discharging gas. The raw material is pyrolyzed in the reactor 13. Further, the provision of the reactor 13 makes it easy to take out the carbonized material obtained after the pyrolysis treatment from the pyrolysis furnace 10. The reactor 13 can be taken in and out from the in-furnace space 10a of the pyrolysis furnace 10 by opening a door (not shown) provided on the top or side of the pyrolysis furnace 10.

  A heating device 14 is provided in the furnace space 10 a of the pyrolysis furnace 10 as heating means for heating the furnace gas. The heating device 14 is an electric heater, for example, and emits heat when a predetermined power is supplied from a power source provided outside the pyrolysis furnace 10. The heating device 14 is provided outside the reactor 13, and below the bottom surface of the reactor 13 in the example shown in FIG. 1.

  A fan 15 is provided in the in-furnace space 10a of the pyrolysis furnace 10 as a blowing means for flowing gas in the furnace. The illustrated fan 15 includes a blade portion 15a, a rotating shaft 15b to which the blade portion 15a is attached, and a motor 15c that drives the rotating shaft 15b. The rotating shaft 15b passes through the side surface of the pyrolysis furnace 10. It becomes possible to rotate, and the wing part 15a is rotated. In the blade portion 15 a, a motor 15 c is provided outside the pyrolysis furnace 10 in the vicinity of the side wall inside the pyrolysis furnace 10.

  The illustrated fan 15 causes the gas in the furnace to flow in the furnace of the pyrolysis furnace 10 by rotating the blade portion 15a by the motor 15c. For example, the gas passes along a side wall in the furnace of the pyrolysis furnace 10 as shown by an arrow in the figure, passes through the vicinity of the heating device 14 provided between the bottom of the furnace and the bottom of the reactor 13, and reacts. The reactor 13 enters the reactor 13 through the inlet 13 a provided on the side wall of the reactor 13, passes through the reactor 13, exits from the reactor 13 through the outlet 13 b provided on the side wall of the reactor 13, and It circulates in the furnace so as to return to the wing part 15a. The furnace gas is heated by the heating device 14 by this flow, and the raw material in the reactor 13 is thermally decomposed by the heated furnace gas.

An exhaust hole 10b is formed in the upper part of the pyrolysis furnace 10, and a pyrolysis gas generated by pyrolysis of the raw material in the pyrolysis furnace 10 and an inert gas supplied at the time of pyrolysis as necessary from the exhaust hole 10b. Discharged.
In addition, the exhaust pipe 16 connected to the condenser 20 is connected to the discharge hole 10 b, and the gas discharged from the pyrolysis furnace 10 is guided to the condenser 20.

  The condenser 20 has an inlet 20a and a gas outlet 20b for the gas from the pyrolysis furnace 10, and has an inlet 20c and an outlet 20d for cooling water, and the gas introduced into the condenser 20 through the exhaust pipe 16 is cooled with water. To cool. As a result, the oil component having a low vapor pressure is liquefied from the gas and collected at the bottom of the condenser 20 for recovery. The gas outlet 20 b of the condenser 20 is connected to the dust collector 22 by a gas pipe 21. The gas from which the oil has been collected is subjected to a combustion treatment by, for example, a combustion tower 23 as a gas treatment device after dust in the gas is separated by the dust collector 22. Therefore, in this embodiment, the gas after the oil component is recovered is not refluxed to the pyrolysis furnace 10.

  In the carbonized material manufacturing apparatus of this embodiment, the reactor 13 has an inlet 13 a for introducing gas and an outlet 13 b for discharging gas, and the inlet of the reactor 13 in the pyrolysis furnace 10. Gas in pyrolysis circulates inside the pyrolysis furnace 10 through 13a and the outlet 13b. Therefore, since the flow rate of the heated furnace gas can be increased, the amount of heat transfer can be easily increased. Therefore, further soaking and pyrolysis treatment of the in-furnace material immediately after the start of heating. It is possible to increase the processing amount per time. Therefore, the carbonized material can be rapidly produced with less energy. In addition, the carbonized material manufacturing apparatus of the present embodiment does not recirculate the gas that has passed through the condenser 20 and supply it to the pyrolysis furnace 10, so that the flow rate of the heated furnace gas is increased. Since it is not necessary to increase the cooling capacity of the condenser 20 or the heating capacity of the gas heating device, it is possible to reduce capital investment and running cost. Further, since the blade 15a of the fan 15 is provided in the internal space 10a of the pyrolysis furnace, the fan 15 is operated so that the gas in the furnace circulates in the pyrolysis furnace 10. it can.

  In order to heat the raw material quickly and uniformly, it is more preferable to pass the furnace gas through the vicinity of the central portion of the raw material accommodated in the reactor 13 by the fan 15. Therefore, in the illustrated embodiment, the reactor 13 has a plurality of holes on the side as the inlet 13a and the outlet 13b of the reactor 13, for example, the side is meshed. Thus, the high-temperature furnace gas can pass through the reactor 13 through the holes, and can pass through the vicinity of the center of the stored raw material.

  In the illustrated embodiment, the in-furnace gas flowed by the fan 15 is heated to a high temperature necessary for pyrolysis of the raw material by a heating device 14 provided in the furnace of the pyrolysis furnace 10. For this reason, it is preferable that the heating device 14 is disposed at a position where the gas flow in the pyrolysis furnace 10 passes in the vicinity of the heating device 14. In other words, the heating device 14 is preferably positioned on the gas flow passage formed in the furnace. In the illustrated embodiment, the heating device 14 is provided in the pyrolysis furnace 10 and outside the reactor 13, and more specifically, near the bottom surface in the pyrolysis furnace 10 and the bottom surface of the reactor 13. It is provided below. In the illustrated embodiment, the outer wall of the reactor 13 serves as a partition that forms a flow path for the gas in the furnace in the pyrolysis furnace 10, and therefore, between the bottom surface in the pyrolysis furnace 10 and the bottom surface of the reactor 13. Since this space serves as a flow path for the in-furnace gas, the in-furnace gas can be reliably and efficiently heated by disposing the heating device 14 at this position. Moreover, the responsiveness of temperature control is also good. Further, the heating apparatus 14 is not limited to the illustrated heating apparatus 14, and the apparatus for heating may be outside the furnace as long as it is adjacent to the pyrolysis furnace 10.

  In another embodiment of the carbonized material production apparatus of the present invention shown in FIG. 2, an inert gas heating device 17 is provided in the middle of a gas pipe 12 flow path connected to the pyrolysis furnace 10 and the inert gas supply device 11. Is provided. Since the other configuration is the same as that of the embodiment shown in FIG. 1, only the pyrolysis furnace 10 and its peripheral devices are shown in FIG. 2 so that the difference can be understood. In FIG. 2, the same members and devices as those in FIG. 1 are denoted by the same reference numerals, and therefore the description thereof will be omitted in the following description in order to avoid duplicate descriptions. By supplying an inert gas heated to a predetermined temperature, for example, 400 to 600 ° C., into the pyrolysis furnace 10 by the inert gas heating device 17, the furnace temperature can be rapidly increased from the initial stage of the thermal decomposition treatment per time. Can be increased.

  Next, an embodiment of a method for producing a carbonized material of the present invention will be described. In the present embodiment, a raw material containing a polymer organic compound is accommodated in the pyrolysis furnace 10, and the inert gas is supplied from the inert gas supply device 11 to the pyrolysis furnace 10 while the raw material is heated by the heating device 14. The pyrolysis gas generated in the pyrolysis furnace 10 is led to the condenser 20 and the oil in the pyrolysis gas is separated and recovered by the condenser 2 while pyrolyzing the raw material containing the polymer organic compound. The process of carrying out is included. A fan 15 is provided in the pyrolysis furnace 10, and gas flows in the pyrolysis furnace 10 by the fan 15.

  Examples of the raw material containing the polymer organic compound to be pyrolyzed in the pyrolysis furnace 10 include, for example, a waste of a polymer organic compound including a tire, specifically, a used tire cut into an appropriate size. . The tire is made of a member reinforced with a cord of steel or organic fiber, if necessary, with natural or synthetic rubber added with carbon black and vulcanized. It is preferable to produce a carbonized material according to the present invention using a used tire as a raw material because the used tire can be effectively used. In addition to used tires, spew and buffed rubber wastes generated at tire manufacturing plants can be used as raw materials.

  The furnace gas when the raw material containing the polymer organic compound is pyrolyzed in the pyrolysis furnace 10 preferably has an oxygen concentration of 1 vol% or less. When the oxygen concentration of the in-furnace gas is 1 vol% or less, a good quality carbonized material can be obtained.

  As an example, the degree of flow when the gas in the furnace is caused to flow by the fan 15 depends on the scale of the pyrolysis furnace 10, the amount of raw material accommodated in the pyrolysis furnace 10, etc. The flow rate can be 0.5 to 5 m / s, more specifically about 1 m / s.

  The carbonized material obtained by the manufacturing apparatus and the manufacturing method of the present embodiment is a residue after pyrolyzing a raw material containing a high molecular organic compound in the pyrolysis furnace 10. When the raw material containing the high molecular organic compound is tire waste, a steel cord or a steel wire may be mixed in the carbonized material. In this case, it is preferable to separate the steel cord and the steel wire from the carbonized material by magnetically sorting the carbonized material. The carbonized material after the magnetic separation is pulverized to a desired particle size, classified, and used as a carbon raw material having a predetermined particle size, for example, mixed with carbon black for tires.

The carbonized material was manufactured using the carbonized material manufacturing apparatus of the embodiment shown in FIG. FIG. 3 is a graph showing changes over time in the temperature at the time of thermal decomposition in the reactor 13 in which tire waste is accommodated in the thermal decomposition furnace 10. The temperature in FIG. 3 is indicated by an index where the maximum temperature during heating is 100 and the normal temperature is 0. As can be seen from FIG. 3, in the carbonized material manufacturing apparatus of this embodiment, the time to reach the set temperature was just over an hour, which was passed through a conventional apparatus, specifically, a condenser. It was faster than an apparatus that refluxed the gas and heated it to supply it to the pyrolysis furnace at a predetermined flow rate.
Further, the carbonized material manufacturing apparatus of the present embodiment is 27% of the amount of heat applied compared to a conventional apparatus that recirculates and heats the gas that has passed through the condenser and supplies the gas to the pyrolysis furnace at a predetermined flow rate. The degree is also small. The reason is that, in the conventional apparatus, the condenser and the gas reheating device have become larger with the increase in equipment, so that the amount of heat required is increased by using the condenser and the gas reheating device. It is considered a thing.

1: Carbonized material manufacturing apparatus 10: Pyrolysis furnace 11: Inert gas supply device (inert gas supply source)
13: Reactor 14: Heating device (heating means)
15: Fan (air blowing means)
20: Condenser

Claims (9)

An apparatus for producing a carbonized material by pyrolyzing the raw material in a reactor provided in a pyrolysis furnace having an internal space capable of containing a raw material containing a macromolecular organic compound,
The reactor has an inlet for introducing gas and an outlet for discharging gas, and the gas in the pyrolysis is passed through the inlet and outlet of the reactor in the pyrolysis furnace. An apparatus for producing a carbonized material characterized by circulating inside. An inert gas supply connected to the pyrolysis furnace;
An oil content recovery device that is connected to the pyrolysis furnace and separates and recovers the oil content in the pyrolysis gas discharged from the pyrolysis furnace;
The carbonized material manufacturing apparatus according to claim 1, further comprising a blowing unit provided in the pyrolysis furnace and configured to flow a gas in the pyrolysis furnace.   The carbonized material manufacturing apparatus according to claim 2, wherein the air blowing means is a fan.   The apparatus for producing a carbonized material according to any one of claims 1 to 3, wherein a plurality of holes through which a gas can pass are disposed on a side surface of the reactor.   The apparatus for producing a carbonized material according to any one of claims 1 to 4, wherein heating means for the pyrolysis treatment is provided inside or outside the pyrolysis furnace.   The apparatus for producing a carbonized material according to claim 5, wherein the heating means is provided in the pyrolysis furnace and outside the reactor, and a gas flow in the pyrolysis furnace passes in the vicinity of the heating means.   Carbonization of any one of Claims 1-6 provided with the inert gas heating apparatus in the middle of the gas flow path connected to the said pyrolysis furnace and the inert gas supply source connected to this pyrolysis furnace. Material production equipment. A method for producing a carbonized material by pyrolyzing the raw material in a reactor provided in a pyrolysis furnace having an internal space capable of containing a raw material containing a polymer organic compound,
In the pyrolysis furnace, gas in pyrolysis is circulated in the pyrolysis furnace through the inlet and the outlet of the reactor having an inlet for introducing gas and an outlet for discharging gas. A method for producing a carbonized material.   The method for producing a carbonized material according to claim 8, wherein the raw material containing the polymer organic compound is a waste of a polymer organic compound containing a tire.

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