Magnetic pyrolysis treatment apparatus

Abstract

Provided is a thermolysis processing apparatus for carrying out thermolysis of organic waste matter and removing a smoke component from within discharged combustible exhaust gas.　In the interior of a smoke reduction device (5) that does not allow smoke gas to leak out, the smoke gas is combusted by a high-temperature electric heating wire (7), whereby the smoke component is reduced.

Description

Technical Field

[0001] The present invention relates to an apparatus for removing soot components from combustible exhaust gas discharged by pyrolyzing or burning organic waste, and a pyrolysis treatment apparatus to which the apparatus is attached.

Background Art

[0002] When pyrolyzing petroleum-derived waste and other organic waste, exhaust gas containing pollutants such as soot and toxic dioxins is generated. In recent years, with the emphasis on environmental measures, various technologies have been disclosed to purify this exhaust gas.

[0003] As purification technologies for exhaust gas containing pollutants such as soot and toxic dioxins according to the prior art, they are disclosed in the following patent documents. Patent Document 1 discloses a technology for removing soot using a filter. Patent Document 2 discloses a technology for a waste pyrolysis apparatus and for removing harmful substances in exhaust gas in water. Patent Document 3 discloses a technology related to soot reduction using a burner. Patent Document 4 discloses a technology for reducing dioxin emissions.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, systems using soot filters incur costs because the soot components adsorbed on the filter must be removed periodically. Systems using water have problems such as requiring large amounts of water and producing contaminated water. There was also the issue of not being able to adequately remove harmful chemical substances such as dioxins.

[0006] There is also a technology that burns the soot itself with an external burner to remove its soot components, but using a burner requires fossil fuels and generates large amounts of CO2. There are problems with this, and there is also the challenge that the thermal energy generated when the soot itself is burned could not be effectively utilized. [Means for solving the problem]

[0007] To solve the above problems, the pyrolysis apparatus and soot reduction apparatus of the present invention have the following configuration. That is, a soot reduction apparatus used in a heat treatment apparatus, wherein soot gas generated from the object to be heat treated is guided into the interior of the soot reduction apparatus through a dedicated exhaust pipe and a soot gas inlet of the soot reduction apparatus, the soot reduction apparatus is a closed space that does not allow soot gas to leak, and an electric heating wire covered with a protective material is provided inside the soot reduction apparatus, the soot gas guided from the heat treatment furnace is burned by the electric heating wire at a high temperature inside the soot reduction apparatus, and the exhaust gas with reduced soot components after combustion treatment is released into the atmosphere through a dedicated chimney from the exhaust gas outlet of the soot reduction apparatus.

[0008] The aforementioned heating element may reach a temperature of 900°C or higher, and the induced soot gas may be combusted inside the soot reduction device by the heat of the heating element.

[0009] The protective material for the heating element may be made of lava rock, heat-resistant steel, or ceramic.

[0010] The aforementioned soot reduction device may also be configured as a heat treatment apparatus characterized by using a highly thermally conductive material for the body of the soot reduction device, installing the soot reduction device in contact with the lower part of a heat treatment furnace that heat-treats an object, and using a highly thermally conductive material for the lower part of the heat treatment furnace to transfer the heat from the soot reduction device into the inside of the heat treatment furnace, thereby assisting in heating the inside of the heat treatment furnace.

[0011] A heat treatment apparatus may also be provided, characterized in that a hole and opening / closing mechanism for inserting the heating element of a heater stick from the outside is provided on the side of the heat treatment furnace, and by closing the opening / closing mechanism, soot components inside the heat treatment furnace are not exposed to the outside, and the heat treatment of the object to be heat-treated in the heat treatment furnace is started by the heater stick.

[0012] The heat treatment apparatus may be characterized as a magnetic pyrolysis treatment apparatus. [Effects of the Invention]

[0013] According to the present invention, since there is no need to use an external burner to burn the soot components, fossil fuels are not used, and CO2 emissions can be suppressed. Furthermore, the material to be treated is thermally decomposed. This allows for the use of waste heat by assisting in the heating of heat treatment furnaces.

[0014] Furthermore, when combined with a magnetic pyrolysis treatment device, it is possible to remove not only soot components but also dioxins and reduce carbon monoxide concentration. In addition, it is possible to assist in heating the heat treatment furnace of the magnetic pyrolysis treatment device, improving treatment efficiency and increasing the types of materials that can be treated. [Brief explanation of the drawing]

[0015] [Figure 1] Front view of the main components of the pyrolysis apparatus according to the present invention [Figure 2] Side view of the main components of the pyrolysis apparatus according to the present invention [Figure 3] Internal configuration diagram of the soot reduction device. [Figure 4]Configuration diagram showing the inside of the soot reduction device

Best Mode for Carrying Out the Invention

[0016] Hereinafter, embodiments of the present invention will be described based on the examples shown in the drawings. The embodiments are not limited to the following examples, and design changes can be appropriately made using conventionally known technologies such as the above-mentioned patent documents without departing from the gist of the present invention.

[0017] FIG. 1 is a front configuration diagram of the main part of the pyrolysis treatment device according to the present invention. FIG. 2 is a side configuration diagram of the main part of the pyrolysis treatment device according to the present invention. The main body of this device is generally in the shape of any one of a quadrangular prism, a rectangular parallelepiped, or a cylinder, and can hold and pyrolyze the object to be processed.

[0018] The opening that can be opened and closed at the upper part of the device is for introducing the object to be heat-treated (such as waste). This opening can be closed during the operation of the pyrolysis treatment so as to confine the exhaust gas and odor from the inside of the device.

[0019] The opening that can be opened and closed at the lower part of the device is for taking out residues such as ash after pyrolysis treatment and metals that cannot be pyrolyzed.

[0020] In this pyrolysis treatment device, the object to be pyrolyzed (organic waste: waste plastic, waste tire, etc.) is introduced through the upper opening. Ignite this object. In this device, since there is no attached flame burner, etc., the one directly ignited on paper scraps, etc., is thrown into the object to be processed to ignite it.

[0021] When the object to be processed catches fire, it generates soot, so the opening of this pyrolysis treatment device shall be closed. In order to assist the combustion of the object to be processed, air is forcibly inserted from the external air supply port with a blower. In addition, by applying magnetism to the forcibly inserted air with a permanent magnet or the like, it can also become a magnetic pyrolysis treatment device.

[0022] Soot gas (unburned gas before treatment) generated when the material to be processed is burned in the pyrolysis treatment apparatus is guided from the inlet of a dedicated exhaust pipe located on the side of the top of the pyrolysis treatment apparatus through the dedicated exhaust pipe to the inlet of the soot gas reduction device and into the interior of the soot reduction device.

[0023] The soot reduction device (Figure 3) consists of a sealed metal box designed to prevent the leakage of soot gases. Inside, a heating element coated with ceramic or heat-resistant steel is provided. In this embodiment, the specifications were set as follows: rating: 200V 3.5kW, insulation resistance: 10MΩ or more at DC500V megohm, dielectric strength: withstand AC1500V / min, watt density: 4.15W / cm, and combustion chamber temperature ≈ 900℃.

[0024] The unburned gases before processing in the soot reduction device contain carbon monoxide and other flammable substances. The inside of the soot reduction device is heated to approximately 900°C by electric heating elements, and these flammable gases burn inside the device.

[0025] Flames will be generated inside this smoke reduction device, so the heating element is protected by being coated with lava rock, ceramic, or heat-resistant steel.

[0026] Unburned gases before treatment are almost completely combusted inside the soot reduction device, removing soot components, significantly reducing carbon monoxide, and drastically reducing dioxins through high-temperature combustion (see table below). At the same time, the 22 substances specified in the Odor Prevention Law are reduced to below regulatory limits. TIFF0007881131000001.tif48166TIFF0007881131000002.tif45166

[0027] Next, the combustion gases processed by the soot reduction device are released into the atmosphere through a dedicated chimney from the exhaust gas outlet installed in the soot reduction device, after the soot components and other impurities have been removed from the exhaust gas.

[0028] Unburned gases before treatment are discharged from the top of the pyrolysis treatment device, and through a dedicated exhaust pipe, are sent to a soot reduction device installed at the bottom of the pyrolysis treatment device. From the exhaust gas outlet, the gases are released into the atmosphere through a dedicated chimney and a dedicated chimney outlet located above the pyrolysis treatment device. To enable this movement of exhaust gases, a forced air inlet is directed between the exhaust gas outlets of the soot reduction device, and forced air from a blower is introduced into the dedicated chimney to forcibly discharge the exhaust gases. This forced air also allows for the guidance of unburned gases before treatment to the soot reduction device.

[0029] The smoke reduction device is installed in close contact with the lower part of the pyrolysis treatment device. The upper part of the smoke reduction device is made of a metal plate with excellent thermal conductivity. Similarly, the lower part of the smoke reduction device is also made of a metal plate with excellent thermal conductivity. This allows the thermal energy generated during the combustion treatment of unburned gas before processing in the smoke reduction device to be efficiently transferred into the furnace of the smoke reduction device.

[0030] In the example above, the pyrolysis apparatus and the soot reduction apparatus are configured as separate units. However, it is also possible to use a single metal plate between the pyrolysis apparatus and the soot reduction apparatus, integrating them into a single unit.

[0031] By efficiently transferring the thermal energy generated from the combustion of unburned gases before processing in the soot reduction device into the furnace of the pyrolysis device, the pyrolysis efficiency of the decomposition device is increased, enabling processing of the target material in a shorter time and allowing processing of materials with high moisture content.

[0032] Furthermore, the heating element of the heater stick may be designed to be inserted into the heat treatment furnace so that the heat treatment of the object to be treated initiated in the heat treatment furnace can be carried out without using an open flame. The heater stick can be heated to a surface temperature of 600°C to 1100°C, enabling the start of the heat treatment of the object to be treated in the heat treatment furnace.

[0033] Figure 4 shows an overview of the heater stick. In this embodiment, at the start of heat treatment, a cylindrical heater stick is inserted into the side of the heat treatment furnace, and an opening / closing lid is provided so that the heat generating part of the cylindrical heater stick can be inserted into and removed from the heat treatment furnace. After the start of heat treatment, the cylindrical heater stick is removed and the lid is closed so that soot and other substances from inside the heat treatment furnace are not exposed. The heater stick is fitted snugly into the insertion hole, thereby sealing the inside and outside of the heat treatment furnace. [Industrial applicability]

[0034] According to the present invention, soot containing carbon monoxide and dioxins generated during thermal decomposition can be burned off by a soot reduction device, and purified exhaust gas can be released into the atmosphere. At the same time, the thermal energy from the soot reduction device can be utilized, allowing for treatment while suppressing CO2 generation. It can improve the efficiency of material processing and has high industrial value. [Explanation of symbols]

[0035] 1. Opening for loading the object to be heat-treated. 2. Openings for cleaning and inspection 3. Magnetized air supply port 4. Guide pipe for unburned gas before treatment 5 Soot reduction device 6. Induction passage pipe for exhaust gas treated by the soot reduction device. 7 Heating wire

Claims

1. The system includes a heat treatment furnace that, after initial ignition assistance, heats the object to be heat-treated by natural combustion without direct external heating of the object inside the furnace, and in conjunction with this, A heat treatment apparatus comprising a soot reduction device integrally used in the lower part of the heat treatment furnace, The soot gas generated when the object burns naturally in the heat treatment furnace is removed by the suction force generated by forced airflow from a blower introduced to the exhaust side of the soot reduction device. It is introduced through a dedicated exhaust pipe from the inlet of the soot reduction device located below the heat treatment furnace, The aforementioned soot reduction device includes a combustion space that is airtight to the outside except for the inlet and exhaust gas outlet. A heating element covered with protective material is placed in the combustion space, and the heating element is heated to over 900°C to burn the introduced unburned soot gas in order to purify it as exhaust gas. The recoverable thermal energy generated by the combustion process is transferred to the heat treatment furnace located above the soot reduction device via a wall made of a thermally conductive material, thereby assisting the temperature rise by natural combustion in the heat treatment furnace. Furthermore, the heat treatment furnace is equipped with a support structure that allows for the introduction of a heating means into the furnace to enable ignition of the object at the start of the heat treatment, and that can maintain the introduced state. The inlet is configured such that when it is closed, the inflow of outside air into the furnace can be blocked. A heat treatment apparatus characterized in that the exhaust gas after combustion treatment is released into the atmosphere through a dedicated chimney from the exhaust gas outlet.

2. The protective material for the heating element is characterized by being made of lava rock, heat-resistant steel, or ceramic. The heat treatment apparatus according to claim 1.

3. The aforementioned thermally conductive material is a metal plate, The heat treatment apparatus according to claim 1 or 2.

4. The heat treatment apparatus according to claim 1 or 2, further comprising a blower for supplying air to the heat treatment furnace, wherein the blower brings a magnet into contact with the air.

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