JP7044536B2 - Raw material processing equipment and raw material processing method - Google Patents

Description

The present invention relates to a raw material processing apparatus and a raw material processing method.

A device for thermally decomposing raw materials such as waste and recovering the pyrolyzed gas is known.

For example, in Patent Document 1, by heating the inside of a pyrolysis furnace to a pyrolysis temperature, the organic substance treatment material put into the pyrolysis furnace is thermally decomposed into a pyrolysis gas and a residue, and the pyrolysis gas is produced. The device for recovery is disclosed. In Patent Document 2, organic waste containing organic substances in a closed chamber is thermally decomposed by heating at a thermal decomposition temperature, and the generated thermal decomposition gas is discharged from the closed chamber without backflow due to the pressure gradient formed in the closed chamber. The device is disclosed.

However, when the heat of the pyrolysis temperature of the pyrolysis target to be recovered is added to the raw material, the residue may be recovered together with the pyrolysis gas generated by the pyrolysis due to sudden boiling or the like. Further, since the pyrolysis gas having a thermal decomposition temperature lower than that of the thermal decomposition gas to be recovered is generated first, the thermal decomposition for generating the thermal decomposition gas to be recovered in the raw material by the heat of vaporization of the pyrolysis gas or the like is generated first. In some cases, the temperature did not work. In addition, there is a risk that the pipe may be blocked due to carbonization of the raw material and the decomposition gas due to heat. Therefore, conventionally, it has been difficult to efficiently obtain the pyrolysis gas to be recovered from the raw material.

Japanese Unexamined Patent Publication No. 2008-179726 International Publication No. 2008/053571

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a raw material processing apparatus and a raw material processing method capable of efficiently obtaining a pyrolysis gas to be recovered.

One aspect of the raw material processing apparatus of the present invention is a first pyrolysis unit that heats the raw material at a first temperature and thermally decomposes the raw material into a first gas and a first residue, and a portion higher than the first temperature and described above . The first residue is heated at a second temperature equal to or higher than the thermal decomposition temperature at which the first residue is thermally decomposed into the second gas to be recovered and the second residue, and the first residue is used as the second gas and the second residue. A second pyrolysis unit is provided , and the first pyrolysis unit is a first member to which the raw material is supplied, and a first member that causes heat of the first temperature to act in the first member. A second member having one thermal action section, the second pyrolysis section connected to the first member and supplied with the first residue, and the second member having the second temperature inside the second member. It has a second thermal action portion on which heat is applied, and the first member and the second member are tubular, and the inner diameter of the first member is smaller than the inner diameter of the second member .

The first member may have a shape that is at least partially bent.

The raw material processing apparatus of the present invention may include a hot gas pipe to which hot gas is supplied from one end side. The first member and the second member are arranged in the heat gas pipe. The second member is arranged on the upstream side in the heat gas supply direction from the first member in the heat gas pipe. The first heat acting unit causes the heat of the first temperature to act in the first member by the hot gas in the hot gas pipe. The second heat acting unit causes the heat of the second temperature to act in the second member by the hot gas in the hot gas pipe.

The raw material processing apparatus of the present invention may include a heat gas supply unit that supplies the heat gas generated by the combustion of the second gas to the heat gas pipe.

The raw material processing apparatus of the present invention may include a recovery unit for recovering the second gas from the second thermal decomposition unit.

One aspect of the raw material processing method of the present invention is a first pyrolysis step of heating the raw material at a first temperature and thermally decomposing the raw material into a first gas and a first residue, and a step higher than the first temperature and said . The first residue is heated at a second temperature equal to or higher than the thermal decomposition temperature at which the first residue is thermally decomposed into the second gas to be recovered and the second residue, and the first residue is used as the second gas and the second residue. In the first thermal decomposition step, the heat of the first temperature is allowed to act in the first member to which the raw material is supplied, and the second thermal decomposition step includes the second thermal decomposition step. In the step, the heat of the second temperature is allowed to act in the second member which is connected to the first member and the first residue is supplied, and the first member and the second member are tubular and the first member. The inner diameter of one member is smaller than the inner diameter of the second member .

According to one aspect of the present invention, the first residue obtained by thermally decomposing the raw material at a first temperature lower than the second temperature used for thermal decomposition of the second gas to be recovered is thermally decomposed at the second temperature. By doing so, the second gas to be recovered is obtained. Therefore, the pyrolysis gas to be recovered can be efficiently obtained.

FIG. 1 is a schematic view showing an example of a raw material processing apparatus. FIG. 2 is an enlarged schematic view of the thermal decomposition section. FIG. 3 is an example of a cross-sectional view of a combustion furnace. FIG. 4 is a schematic diagram showing an example of a raw material processing apparatus. FIG. 5 is a schematic view showing an example of a raw material processing apparatus. FIG. 6 is a schematic view showing an example of a raw material processing apparatus. FIG. 7 is a schematic view showing an example of a raw material processing apparatus. FIG. 8 is a schematic view showing an example of a raw material processing apparatus.

An embodiment of the raw material processing apparatus and the raw material processing method of the present embodiment will be described below with reference to the accompanying drawings. In addition, in this specification, the same reference numeral may be given to the part which shows the same member or the same function, and the description may be omitted.

(First Embodiment)
FIG. 1 is a schematic view showing an example of a raw material processing apparatus 10. The raw material processing apparatus 10 is an apparatus for thermally decomposing the raw material 100.

The raw material 100 is a material to be thermally decomposed. The raw material 100 contains an organic substance. The organic substance is, for example, an organic compound such as plastic or acrylic, an organic solvent, or the like, but is not limited thereto. The raw material 100 may contain a plurality of types of organic substances. Further, the raw material 100 may further contain an inorganic substance in addition to the organic substance. Further, the raw material 100 may further contain water. Further, it is preferable that the raw material 100 does not contain a halide such as polyvinyl chloride or a chlorine compound.

The raw material processing apparatus 10 includes a thermal decomposition unit 11, a heat gas supply unit 12, a raw material supply unit 13, and a recovery unit 14.

The heat gas supply unit 12 supplies the heat gas 30 to the pyrolysis unit 11. The raw material supply unit 13 supplies the raw material 100 to the thermal decomposition unit 11. The thermal decomposition unit 11 thermally decomposes the raw material 100 supplied from the raw material supply unit 13 by using the hot gas 30 supplied from the heat gas supply unit 12. The recovery unit 14 recovers the pyrolysis gas generated by the thermal decomposition of the raw material 100 by the thermal decomposition unit 11. Hereinafter, each part will be described in detail.

The thermal decomposition unit 11 thermally decomposes the raw material 100. In the present embodiment, the thermal decomposition unit 11 heats the raw material 100 at the first temperature and thermally decomposes the raw material 100 into a first gas and a first residue. Then, the thermal decomposition unit 11 heats the first residue at a second temperature higher than the first temperature, and thermally decomposes the first residue into a second gas and a second residue. By these thermal decompositions, the thermal decomposition unit 11 obtains a second gas to be recovered.

In the present embodiment, the thermal decomposition unit 11 includes a hot gas pipe 28, a first member 16, and a second member 24.

The hot gas pipe 28 is a tubular member. In the present embodiment, a case where the longitudinal direction of the hot gas pipe 28 coincides with the vertical direction will be described as an example. The longitudinal direction of the hot gas pipe 28 may be inclined with respect to the vertical direction.

The hot gas pipe 28 is a pipe for passing the hot gas 30. The hot gas 30 is a high-temperature gas having a predetermined temperature or higher. The details of the heat gas 30 will be described later.

The hot gas pipe 28 has openings 28A and 28B at one end and the other end in the longitudinal direction. The opening 28A is provided on the lower end surface of the hot gas pipe 28 in the vertical direction. The opening 28B is provided on the upper end surface of the hot gas pipe 28 in the vertical direction. The lower side of the hot gas pipe 28 in the vertical direction corresponds to the upstream side of the flow of the hot gas 30 in the present embodiment. Further, the upper side of the hot gas 28 in the vertical direction corresponds to the downstream side of the flow of the hot gas 30 in the present embodiment.

The hot gas pipe 28 is supplied with the hot gas 30 from the opening 28A. The hot gas 30 supplied to the hot gas pipe 28 passes through the hot gas pipe 28 and is discharged from the opening 28B on the other end side of the hot gas pipe 28.

The first member 16 and the second member 24 are arranged on the downstream side of the flow of the heat gas 30 from the grid-like member 47, preferably inside the waste heat portion 48 or the heat gas pipe 28. In the present embodiment, the form in which the first member 16 and the second member 24 are arranged inside the heat gas pipe 28 will be described as an example. Further, in the present embodiment, the first member 16 and the second member 24 are tubular members.

The first member 16 is a member for thermally decomposing the raw material 100 by heat exchange with the hot gas 30. Specifically, the raw material 100 is supplied to the first member 16. The raw material 100 is supplied into the first member 16 in a direction opposite to the supply direction of the heat gas 30. The raw material 100 supplied into the first member 16 is thermally decomposed by heat exchange with the heat gas 30.

The first member 16 is arranged in the hot gas pipe 28 on the downstream side of the hot gas 30 in the supply direction (arrow X3 direction) from the second member 24. The supply direction of the hot gas 30 is the moving direction of the hot gas 30.

In the present embodiment, the first member 16 has openings 16A and 16B at one end and the other end in the longitudinal direction. The opening 16A is provided on the end surface of the first member 16 on the downstream side in the supply direction of the heat gas 30. The opening 16B is provided on the end surface of the first member 16 on the upstream side in the supply direction of the heat gas 30. The first member 16 is connected to the second member 24 via the opening 16B.

In the present embodiment, the raw material 100 is supplied to the first member 16 from the opening 16A. That is, the raw material 100 is supplied to the first member 16 from the downstream side in the supply direction of the heat gas 30. The first member 16 may be a member that is sealed with the raw material 100 filled.

The first member 16 has a shape in which at least a part thereof is bent. For example, the first member 16 has a spiral shape, an S-shape, a U-shape, or the like. In the present embodiment, the case where the first member 16 has a spiral shape will be described as an example.

When at least a part of the first member 16 has a bent shape, the surface area on which the heat gas 30 acts increases, so that the heat exchange efficiency between the raw material 100 supplied to the first member 16 and the heat gas 30 is improved. be able to. The first member 16 may have a non-bending shape.

In the present embodiment, a part of the first member 16 and the hot gas pipe 28 functions as the first thermal decomposition unit 20.

FIG. 2 is a schematic view showing an enlarged view of the thermal decomposition unit 11.

The first thermal decomposition unit 20 heats the raw material 100 at the first temperature and thermally decomposes the raw material 100 into the first gas 102 and the first residue 104. In the present embodiment, the first pyrolysis unit 20 heats the raw material 100 at the first temperature by the heat of the heat gas 30. When the raw material 100 is heated at the first temperature, it is thermally decomposed into a first gas 102 and a first residue 104.

The first residue 104 is a component other than the first gas 102 in the raw material 100. The first residue 104 is not limited to the solid component and may contain a liquid component.

In the present embodiment, the first thermal decomposition unit 20 includes a first member 16 and a first thermal action unit 18. In the present embodiment, a part of the heat gas pipe 28 functions as the first heat acting unit 18. Specifically, the region of the hot gas pipe 28 that covers the first member 16 and the hot gas 30 that passes between the inner wall of the hot gas pipe 28 and the outer periphery of the first member 16 serve as the first heat acting unit 18. Function.

The first heat acting unit 18 causes heat of the first temperature to act in the first member 16. In the present embodiment, the heat gas 30 flows into the periphery of the first member 16 (the region between the inner wall of the heat gas pipe 28 and the outer periphery of the first member 16), so that the first temperature enters the first member 16. The heat of the action. The first member 16 is made of a material having a thermal conductivity such that heat of the first temperature is applied to the inside of the first member 16 by the heat of the heat gas 30 passing outside the first member 16. Just do it.

The first temperature is a temperature equal to or higher than the thermal decomposition temperature of the first gas 102 and lower than the thermal decomposition temperature of the second gas 106. The second gas 106 is a pyrolysis gas to be recovered. The first gas 102 is a pyrolysis gas generated by pyrolysis at a pyrolysis temperature lower than that of the second gas 106.

The first temperature depends on the type of the first gas 102 and the second gas 106. The first temperature is, for example, 100 ° C. or higher and 150 ° C. or lower, 200 ° C. or higher and 600 ° C. or lower, and the like.

The second temperature is higher than the first temperature and higher than the thermal decomposition temperature of the second gas 106. The second temperature depends on the type of the second gas 106 to be recovered. The second temperature is, for example, 400 ° C. or higher and 600 ° C. or lower, 600 ° C. or higher and 1000 ° C. or lower. From the viewpoint of carbonization prevention, the recommended preferred temperature range of the second temperature is 600 ° C. or higher and 1000 ° C. or lower.

Next, the second member 24 will be described. The second member 24 is a member for further pyrolyzing the first residue 104 obtained by the thermal decomposition by the first thermal decomposition unit 20 with the thermal gas 30. Specifically, the first member 16 supplies the first residue 104 to the second member 24. The first residue 104 is supplied into the second member 24 in the direction opposite to the supply direction of the hot gas 30, and the 1 residue 104 is thermally decomposed by the hot gas 30.

Specifically, the second member 24 is arranged in the hot gas pipe 28 on the upstream side in the supply direction of the hot gas 30 from the first member 16. The second member 24 is connected to the first member 16. Specifically, an opening 24A and an opening 24A'are provided on one end side of the second member 24. The opening 24A and the opening 24A'are provided at the end portion of the second member 24 on the downstream side in the supply direction of the heat gas 30. On the other hand, the other end surface of the second member 24 forms the bottom portion 24B and is closed.

In the present embodiment, the second member 24 is connected to the first member 16 via the opening 24A and the opening 16B of the first member 16. Further, a temperature sensor 91 is arranged on the second member 24. The temperature sensor 91 detects the temperature inside the second member 24.

In the present embodiment, a part of the second member 24 and the hot gas pipe 28 functions as the second pyrolysis unit 22. The second thermal decomposition unit 22 heats the first residue 104 at the second temperature and thermally decomposes the first residue 104 into the second gas 106 and the second residue 108. The second residue 108 is a component of the first residue 104 other than the second gas 106. The second residue 108 is not limited to the solid component and may contain a liquid component.

The second pyrolysis unit 22 includes a second member 24 and a second thermal action unit 26. In the present embodiment, a part of the hot gas pipe 28 functions as the second heat acting unit 26. Specifically, the region of the hot gas pipe 28 that covers the second member 24 and the hot gas 30 that passes between the inner wall of the hot gas pipe 28 and the outer periphery of the second member 24 serve as the second heat acting unit 26. Function.

The second heat acting unit 26 causes heat of the second temperature to act in the second member 24. In the present embodiment, the heat gas 30 flows around the second member 24, so that the heat of the second temperature acts in the second member 24. The second member 24 is made of a material having a thermal conductivity such that heat of a second temperature is applied to the inside of the second member 24 by the heat of the heat gas 30 passing outside the second member 24. Just do it.

Returning to FIG. 1, the explanation will be continued. The raw material supply unit 13 supplies the raw material 100 to the thermal decomposition unit 11.

The raw material supply unit 13 includes a raw material storage unit 38, a raw material supply pipe 36, a transfer pump 34, and a raw material supply pipe 32.

The raw material storage unit 38 stores the raw material 100. The raw material storage unit 38 is connected to the opening 16A of the first member 16 via the raw material supply pipe 36, the transfer pump 34, and the raw material supply pipe 32. The raw material supply pipe 36 and the raw material supply pipe 32 are provided with a valve 40 and a valve 42 for preventing backflow.

The transfer pump 34 supplies the raw material 100 stored in the raw material storage unit 38 to the first member 16. The raw material 100 stored in the raw material storage unit 38 is sucked up by the transfer pump 34 and sent to the first member 16 through the raw material supply pipe 36 and the raw material supply pipe 32. It is preferable that the transfer pump 34 supplies the raw material 100 to the first member 16 at a pressure equal to or higher than the pressure generated by the first gas 102 generated in the first member 16.

Next, the collection unit 14 will be described. The recovery unit 14 recovers at least the second gas 106 from the second pyrolysis unit 22.

The first gas 102 may be supplied from the first member 16 to the second member 24 together with the first residue 104. The first gas 102 supplied to the second member 24 is also recovered by the recovery unit 14. That is, the recovery unit 14 may recover the first gas 102 together with the second gas 106. In the present embodiment, the recovery unit 14 recovers the first gas 102 and the second gas 106. In the following, when the first gas 102 and the second gas 106 are collectively described, they may be simply referred to as a pyrolysis gas 107.

The recovery unit 14 includes a gas discharge pipe 66, a cooling pipe 68, a recovery pipe 70, a pressure gauge 71, a pressure reducing pump 72, a recovery pipe 74, and a recovery tank 58A.

As shown in FIG. 2, one end of the gas discharge pipe 66 is connected to the opening 24A'of the second member 24. A temperature sensor 92 is provided at one end of the gas discharge pipe 66. The temperature sensor 92 is used to detect the pyrolysis gas 107 in the gas discharge pipe 66.

Returning to FIG. 1, the other end of the gas discharge pipe 66 is connected to the recovery tank 58A via the cooling pipe 68, the recovery pipe 70, the pressure reducing pump 72, and the recovery pipe 74. The recovery pipe 70 is provided with a valve 76 for preventing backflow. Further, the recovery pipe 70 is provided with a pressure gauge 71 for measuring the pressure inside the pipe.

The decompression pump 72 decompresses the pressure so that the connection portion of the second member 24 with the gas discharge pipe 66, that is, the vicinity of the opening 24A'of the second member 24 becomes a negative pressure. For example, the decompression pump 72 decompresses the opening 24A'to have a negative pressure according to the measurement result of the pressure gauge 71. Therefore, the pyrolysis gas 107 is recovered from the second member 24.

The cooling pipe 68 cools the pyrolysis gas 107 recovered from the second member 24 via the gas discharge pipe 66. By being cooled by the cooling pipe 68, the pyrolysis gas 107 becomes a liquid or gaseous fuel 110. The fuel 110 can be reused. The fuel 110 is recovered in the recovery tank 58A via the recovery pipe 70 and the recovery pipe 74. Further, the pyrolysis gas 107 can be recovered and stored as a flammable gas in a gas holder, and can be reused in the same manner as the fuel 110.

Next, the heat gas supply unit 12 will be described. The heat gas supply unit 12 has a function as a boiler for heating applications that generates steam or hot water. The hot gas supply unit 12 transmits the hot gas 30 obtained by burning the fuel to the water supply pipe to which the boiler supply water is supplied and exchanges heat to generate steam and hot water. Then, the hot gas 30 (exhaust gas) after heat exchange for generating the steam and hot water is supplied to the hot gas pipe 28.

The hot gas 30 is a high-temperature gas generated by the combustion of the pyrolysis gas 107 containing at least one of the first gas 102 and the second gas 106. The high temperature is a temperature equal to or higher than the second temperature. Specifically, the heat gas 30 is air or steam having a second temperature or higher.

Specifically, the heat gas supply unit 12 includes a combustion furnace 46, a waste heat unit 48, and a fuel supply unit 49.

The combustion furnace 46 is a combustion chamber for burning fuel. In the present embodiment, the combustion furnace 46 includes a first combustion pipe 46A, a second combustion pipe 46B, a burner 50, and an air supply blower 51.

The first combustion pipe 46A and the second combustion pipe 46B are, for example, tubular members. One end surface of the first combustion pipe 46A and the second combustion pipe 46B in the longitudinal direction is closed, and the other end surface is open. The other end surfaces of the first combustion pipe 46A and the second combustion pipe 46B are connected to the waste heat portion 48, which will be described later.

The second combustion pipe 46B is arranged inside the first combustion pipe 46A. Air is supplied to the gap between the first combustion pipe 46A and the second combustion pipe 46B by the air supply blower 51.

FIG. 3 is an example of a cross-sectional view of the combustion furnace 46. The second combustion pipe 46B is provided with a plurality of through holes 46C. The penetration direction of the through hole 46C (arrow X0 direction) is a through hole inclined by a predetermined angle α with respect to a virtual straight line L along a straight line connecting the circular center O and the outer periphery of the cross section of the second combustion pipe 46B at the shortest distance. Is. It should be noted that α is larger than 0 ° and smaller than 90 °. In the second combustion pipe 46B, a plurality of through holes 46C are arranged at predetermined intervals along the circumferential direction of the cross section of the second combustion pipe 46B.

The air supplied from the supply air blower 51 reaches the inside of the second combustion pipe 46B through the plurality of through holes 46C. The plurality of through holes 46C are arranged so as to be inclined with respect to the virtual straight line L as described above. Therefore, a swirling flow Q is generated in the second combustion pipe 46B.

Return to FIG. 1 and continue the explanation. Then, the air supply blower 51 supplies air to the gap between the first combustion pipe 46A and the second combustion pipe 46B from the closed one end surface side of the combustion furnace 46. Therefore, a swirling flow Q is generated in the second combustion pipe 46B while moving from the closed one end surface side to the open other end surface side (arrow X1 direction) of the combustion furnace 46. Further, this also serves as cooling of the main body of the combustion furnace 46.

Fuel 110 is supplied into the second combustion pipe 46B. The fuel 110 is supplied to the upstream side of the swirling flow Q in the moving direction (arrow X1 direction) in the second combustion pipe 46B. In the present embodiment, the fuel 110 is supplied from the fuel supply unit 49 into the second combustion pipe 46B (details will be described later).

The burner 50 burns the fuel 110 supplied in the first combustion pipe 46A. The burner 50 is, for example, a natural gas (LNG) burner. The burner 50 is provided at the end of the second combustion pipe 46B on the upstream side in the moving direction of the swirling flow Q. The burner 50 has a temperature raising function and can be used as a fire source when the fire is extinguished by a safety device or the like.

The fuel 110 supplied into the second combustion pipe 46B is burned by the heat from the burner 50 and the air supplied from the air supply blower 51. By this combustion, heat gas 30 is generated in the second combustion pipe 46B. The temperature of the hot gas 30 generated by the combustion of the fuel 110 is at least a temperature equal to or higher than the second temperature of the second gas 106. For example, the temperature of the hot gas 30 in the second combustion pipe 46B is 800 ° C. or higher. A temperature sensor 93 is provided in the second combustion pipe 46B. The temperature sensor 93 detects the temperature inside the second combustion pipe 46B.

The heat gas 30 generated in the second combustion pipe 46B is supplied to the waste heat unit 48.

The waste heat unit 48 transfers the heat obtained by burning the fuel in the combustion furnace 46 to the liquid and exchanges the heat with steam or hot water. In the present embodiment, the waste heat unit 48 supplies the heat gas 30 generated in the combustion furnace 46 to the heat gas pipe 28 after heat exchange with a liquid such as boiler water supply. In the present embodiment, the waste heat section 48 includes a first waste heat tube 48A, a second waste heat tube 48B, a supply section 80, a supply tube 82, and a heating tube 84.

The first waste heat tube 48A and the second waste heat tube 48B are tubular members. The second waste heat tube 48B is arranged inside the first waste heat tube 48A.

One end of the second waste heat tube 48B on the upstream side in the moving direction of the swirling flow Q is connected to the open end surface of the second combustion tube 46B via a grid-like member 47. The grid-like member 47 is a grid-like member having a plurality of through holes through which the heat gas 30 can pass. The grid member 47 is, for example, a grate.

A hot gas pipe 28 is connected to the other end side of the second waste heat pipe 48B. Specifically, in the second waste heat pipe 48B, the opening 28A of the hot gas pipe 28 is connected to the downstream side in the moving direction of the swirling flow Q.

Therefore, the heat gas 30 generated in the combustion furnace 46 moves along the moving direction of the swirling flow Q (direction of arrow X1), and the grid-like member 47 provided between the combustion furnace 46 and the waste heat portion 48. To the waste heat unit 48. Then, the heat gas 30 supplied to the waste heat unit 48 moves in the second waste heat pipe 48B along the moving direction of the swirling flow Q, and passes through the opening 28A of the heat gas pipe 28 to the heat gas pipe 28. (See arrow X2, arrow X3).

The heating tube 84 is a tubular member having a diameter smaller than that of the second waste heat tube 48B. The heating tube 84 is arranged between the first waste heat tube 48A and the second waste heat tube 48B. In the present embodiment, the heating tube 84 is wound in contact with the outer periphery of the second waste heat tube 48B. One end of the heating pipe 84 is connected to the supply unit 80 via the supply pipe 82. The other end of the heating tube 84 is an opening 86.

The supply unit 80 supplies the liquid to the heating pipe 84 via the supply pipe 82. The liquid is, for example, water. The liquid supplied from the supply unit 80 to the heating pipe 84 via the supply pipe 82 is heated by the hot gas 30 in the second waste heat pipe 48B. Then, the heated liquid or the vapor of the liquid is discharged from the opening 86. The discharged steam may be used, for example, for heating some members.

That is, the waste heat unit 48 supplies the hot gas 30 after heat exchange with the liquid supplied to the heating pipe 84 to the hot gas pipe 28.

Then, the hot gas 30 supplied into the hot gas pipe 28 passes around the second member 24 arranged in the hot gas pipe 28, and then passes around the first member 16. Then, the hot gas 30 is discharged from the opening 28B on the other end side of the hot gas pipe 28.

In the raw material processing apparatus 10, the first member 16 and the second member are arranged so that the heat gas 30 at the first temperature acts on the first member 16 and the heat gas 30 at the second temperature acts on the second member 24. The shape, length, diameter, material, combustion conditions, etc. of the 24, the hot gas pipe 28, and the combustion furnace 46 may be adjusted in advance.

The raw material processing apparatus 10 may adjust the temperature of the heat gas 30 generated in the heat gas supply unit 12 by adjusting the combustion conditions. For example, the raw material processing apparatus 10 adjusts the supply amount of the fuel 110 to the combustion furnace 46, the amount of air used for combustion, and the like based on the detection result of the temperature sensor 91 and the detection result of the temperature sensor 93. Then, the temperature of the heat gas 30 may be adjusted.

Next, the fuel supply unit 49 will be described. The fuel supply unit 49 supplies the liquid fuel 110 to the heat gas supply unit 12.

The fuel supply unit 49 includes a recovery tank 58B, a fuel supply pipe 56, and a fuel supply pipe 52. Each of the fuel supply pipe 56 and the fuel supply pipe 52 is provided with a valve 60, a valve 62, and a valve 64 for preventing backflow.

The recovery tank 58B stores the fuel 110 recovered by the recovery unit 14. That is, the recovery tank 58B may be one in which the recovery tank 58A is removed from the recovery pipe 74 and connected to the fuel supply pipe 56. Further, the recovery tank 58A and the recovery tank 58B may be integrally configured as the recovery tank 58.

The transfer pump 54 supplies the fuel 110 stored in the recovery tank 58B to the second combustion pipe 46B via the fuel supply pipe 56 and the fuel supply pipe 52. The opening 52A on one end side in the longitudinal direction of the fuel supply pipe 52 is arranged on the upstream side in the moving direction of the swirling flow Q in the second combustion pipe 46B. Therefore, the fuel 110 supplied from the fuel supply unit 49 is supplied to the upstream side in the moving direction of the swirling flow Q in the second combustion pipe 46B.

Next, the operation of the raw material processing apparatus 10 of the present embodiment will be described.

―First pyrolysis process―
First, the raw material processing apparatus 10 executes a first thermal decomposition step of heating the raw material 100 at a first temperature and thermally decomposing the raw material 100 into a first gas 102 and a first residue 104.

Specifically, the raw material supply unit 13 supplies the raw material 100 into the first member 16 of the first thermal decomposition unit 20 from the opening 16A of the first member 16.

It is assumed that the inside of the first member 16 and the second member 24 is filled with the inert gas in the state before the supply of the raw material 100. The inert gas is, for example, argon or nitrogen.

This will be described with reference to FIG. The heat of the first temperature acts on the raw material 100 supplied into the first member 16 by the heat gas 30 passing through the heat gas pipe 28. Specifically, the first member 16 is arranged in the hot gas pipe 28 on the downstream side of the hot gas 30 in the supply direction (see the arrow X3 direction) from the second member 24. Therefore, the heat of the hot gas 30, which has a lower temperature than that of the second member 24, that is, the heat of the first temperature acts on the first member 16.

When the raw material 100 in the first member 16 is heated at the first temperature, it is thermally decomposed into a first gas 102 and a first residue 104. Then, the first gas 102 and the first residue 104 are generated in the first member 16.

The pressure of the first gas 102 generated in the first member 16 causes the first residue 104 and the first gas 102 to be supplied from the first member 16 to the second member 24.

As described above, for example, the transfer pump 34 of the raw material supply unit 13 supplies the raw material 100 to the first member 16 at a pressure higher than the pressure generated by the first gas 102 generated in the first member 16. Therefore, due to the pressure of the first gas 102 generated in the first member 16, the first residue 104 and the first gas 102 move to the upstream side in the supply direction of the hot gas 30, that is, to the second member 24 side. Then, the first gas 102 and the first residue 104 are supplied to the second member 24 through the opening 16B of the first member 16.

-Second pyrolysis process-
Next, the raw material processing apparatus 10 executes a second thermal decomposition step of heating the first residue 104 at the second temperature and thermally decomposing the first residue 104 into the second gas 106 and the second residue 108.

Specifically, the first gas 102 supplied to the second member 24 is recovered by the recovery unit 14 via the gas discharge pipe 66. On the other hand, the first residue 104 supplied to the second member 24 is heated to the second temperature by the heat gas 30. Specifically, the second member 24 is arranged in the hot gas pipe 28 on the upstream side of the hot gas 30 in the supply direction from the first member 16. Therefore, the heat of the hot gas 30 having a higher temperature, that is, the heat of the second temperature acts on the second member 24 as compared with the first member 16.

Therefore, the first residue 104 is thermally decomposed into the second gas 106 and the second residue 108. The second gas 106 is recovered by the recovery unit 14 via the gas discharge pipe 66. The second residue 108 collects in the bottom portion 24B of the second member 24. Further, the second gas 106 promotes decomposition by water or steam in order to prevent carbonization of the raw material 100 due to heat.

Returning to FIG. 1, other steps will be described. The recovery unit 14 cools the pyrolysis gas 107 recovered from the second member 24 by the cooling pipe 68, and recovers it as fuel 110 in the recovery tank 58A. The fuel supply unit 49 supplies the fuel 110 from the recovery tank 58B storing the recovered fuel 110 to the heat gas supply unit 12.

The fuel 110 supplied to the heat gas supply unit 12 is burned by the heat from the burner 50 and the air supplied from the air supply blower 51. Therefore, the heat gas 30 is generated in the second combustion pipe 46B of the heat gas supply unit 12. The hot gas 30 moves in the second combustion pipe 46B along the moving direction (arrow X1 direction) of the swirling flow Q formed in the second combustion pipe 46B. Then, the hot gas 30 reaches the inside of the second waste heat pipe 48B via the grid-like member 47, and is supplied into the hot gas pipe 28 from the opening 28A of the hot gas pipe 28.

As shown in FIG. 2, the diameters of the first member 16 and the hot gas pipe 28 may be such that the hot gas 30 can pass through the gap between the first member 16 and the hot gas pipe 28. The diameters of the second member 24 and the hot gas pipe 28 may be such that the hot gas 30 can pass through the gap between the second member 24 and the hot gas pipe 28.

Further, the inner diameters of the first member 16 and the second member 24 may be the same or different. However, the inner diameter of the first member 16 is preferably smaller than the inner diameter of the second member 24. When the inner diameter of the first member 16 is smaller than the inner diameter of the second member 24, the first residue 104 thermally decomposed in the first member 16 is efficiently supplied to the second member 24 at a faster speed. It is considered that this is because the pump function of pushing the first residue 104 to the second member 24 by the first gas 102 generated in the first member 16 works more efficiently.

Further, it is preferable that the inner and outer diameters of the first member 16 are such that the raw material 100, the first gas 102, and the first residue 104 can move inside, and are as small as possible. This is to improve the thermal efficiency of the heat gas 30.

Similarly, the inner and outer diameters of the second member 24 are such that the first gas 102, the first residue 104, the second gas 106, and the second residue 108 can move inside, and are possible. It is preferably as small as possible. This is to improve the thermal efficiency of the heat gas 30.

Further, in the present embodiment, the case where both the first member 16 and the second member 24 have a tubular shape has been described. However, only one of the first member 16 and the second member 24 may have a tubular shape. From the viewpoint of improving the supply speed of the first residue 104 to the second member 24 by the first gas 102, at least the first member 16 is preferably tubular.

Further, the second member 24 may have a shape in which at least a part thereof is bent, similarly to the first member 16.

As described above, the raw material processing apparatus 10 of the present embodiment includes a first pyrolysis unit 20 and a second pyrolysis unit 22. The first thermal decomposition unit 20 heats the raw material 100 at the first temperature and thermally decomposes the raw material 100 into the first gas 102 and the first residue 104. The second pyrolysis unit 22 heats the first residue 104 at a second temperature higher than the first temperature and higher than the thermal decomposition temperature of the second gas 106 to be recovered, and the first residue 104 is the second gas 106 and the second. 2 Pyrolyze into residue 108.

Here, in the case of the conventional configuration not including the first thermal decomposition unit 20, the following problems may occur. For example, when the heat of the second temperature used for the thermal decomposition of the second gas 106 to be recovered is rapidly applied to the raw material 100, the residue such as the first residue 104 and the second residue 108 is seconded by bumping. It was sometimes recovered together with the gas 106. Further, when heat of the second temperature of the second gas 106 to be recovered is applied to the raw material 100, the first gas 102 having a lower thermal decomposition temperature than the second gas 106 is thermally decomposed first. Due to the heat of vaporization of 1 gas 102 or the like, the heat of the second temperature may not act on the raw material 100. Therefore, conventionally, it has been difficult to efficiently obtain the second gas 106 to be recovered.

On the other hand, in the raw material processing apparatus 10 of the present embodiment, the heat of the second temperature used at the time of thermal decomposition of the second gas 106 to be recovered is not applied to the raw material 100, but the raw material is at a first temperature lower than the second temperature. The 100 is heated and the raw material 100 is thermally decomposed into a first gas 102 and a first residue 104. Then, the raw material processing apparatus 10 heats the first residue 104 obtained by the thermal decomposition at a second temperature and thermally decomposes it into a second gas 106 and a second residue 108. By such two-step thermal decomposition, the raw material processing apparatus 10 obtains the second gas 106 to be recovered.

As described above, the raw material processing apparatus 10 of the present embodiment thermally decomposes the raw material 100 at a first temperature lower than the second temperature in the first thermal decomposition step, so that a component having a low thermal decomposition temperature (first gas 102) is obtained. ) Is removed. Then, in the second thermal decomposition step, the removed first residue 104 of the first gas 102 is thermally decomposed at the second temperature to obtain the second gas 106 to be recovered.

Therefore, in the raw material processing apparatus 10 of the present embodiment, bumping of the residue generated by rapidly heating the raw material 100 at a high temperature such as a second temperature can be suppressed, and the second gas 106 to be recovered is used. At the time of thermal decomposition for obtaining, it is possible to suppress that the heat of the second temperature required for the thermal decomposition does not act.

Therefore, the raw material processing apparatus 10 of the present embodiment can efficiently obtain the pyrolysis gas (second gas 106) to be recovered.

Further, as described above, the raw material processing apparatus 10 of the present embodiment can suppress bumping of the residue during thermal decomposition, so that in addition to the above effects, safety can be improved.

Further, in the raw material processing apparatus 10 of the present embodiment, the raw material 100 is thermally decomposed by using the hot gas 30 which is the exhaust gas after heat exchange by the hot gas supply unit 12 having a function as a boiler. That is, the heat gas 30 of the present embodiment is a combustion gas (exhaust gas) after being used for heat exchange in a heat exchanger such as a boiler. As described above, according to the raw material processing apparatus 10 of the present embodiment, the heat energy generated in the heat gas supply unit 12 can be effectively used, so that the thermal efficiency of the raw material processing apparatus 10 as a whole can be improved.

Further, in the raw material processing apparatus 10 of the present embodiment, the recovery unit 14 recovers the pyrolysis gas 107 from the second pyrolysis unit 22 and stores it as the fuel 110. Therefore, in addition to the above effects, the raw material processing apparatus 10 can recover the pyrolysis gas 107 in a form that can be stored for a long period of time.

The raw material processing apparatus 10 of the present embodiment can recover about 40% to 95% of the raw material 100 as the fuel 110, and the others are the pyrolysis gas 107 and the residue (first residue 104, second residue 104, second). It can be discharged as a residue 108).

Further, in the raw material processing apparatus 10 of the present embodiment, the heat gas supply unit 12 supplies the heat gas 30 generated by the combustion of the fuel 110 that has cooled the recovered pyrolysis gas 107 to the heat gas pipe 28. Then, the raw material processing apparatus 10 thermally decomposes the raw material 100 and the first residue 104 by applying the heat of the hot gas 30 to the second member 24 and the first member 16. Therefore, in the raw material processing apparatus 10 of the present embodiment, the combustion of the fuel 110 by the heat gas supply unit 12 and the thermal decomposition by the thermal decomposition unit 11 can be executed in parallel. Further, by mixing water with the raw material 100 and treating it, carbides can be decomposed by high temperature steam.

In this embodiment, the raw material processing apparatus 10 has described a mode in which the second gas 106 is obtained by two-step thermal decomposition, such as thermal decomposition at a first temperature followed by thermal decomposition at a second temperature. However, the thermal decomposition at the first temperature may include a plurality of stages of thermal decomposition. Specifically, the first pyrolysis unit 20 causes the raw material 100 to be the first gas 102 by sequentially applying heat of different pyrolysis temperatures from the low temperature side to the high temperature side within the range of the first temperature. It may be thermally decomposed into the first residue 104.

(Second embodiment)
In the above embodiment, a mode in which the fuel 110 is supplied to the combustion furnace 46 of the heat gas supply unit 12 has been described. In this embodiment, a mode in which the pyrolysis gas 107 recovered from the second pyrolysis unit 22 is directly supplied to the combustion furnace 46 of the heat gas supply unit 12 will be described.

FIG. 4 is a schematic view showing an example of the raw material processing apparatus 10B of the present embodiment.

The raw material processing apparatus 10B includes a thermal decomposition unit 11, a heat gas supply unit 12B, and a raw material supply unit 13. The first embodiment of the first embodiment except that the raw material processing apparatus 10B includes a heat gas supply unit 12B instead of the heat gas supply unit 12 and does not include a recovery unit 14 and a fuel supply unit 49 (see FIG. 1). It has the same configuration as the raw material processing apparatus 10 of the above.

The heat gas supply unit 12B supplies the heat gas 30 to the heat gas pipe 28 in the same manner as the heat gas supply unit 12 of the first embodiment.

The heat gas supply unit 12B includes a combustion furnace 46, a waste heat unit 48, and a gas discharge pipe 94. The heat gas supply unit 12B has the same configuration as the heat gas supply unit 12 of the first embodiment except that the gas discharge pipe 94 is provided in place of the fuel supply unit 49 (see FIG. 1).

The gas discharge pipe 94 is a tubular member. One end side of the gas discharge pipe 94 is connected to the opening 24A'of the second member 24 (see also FIG. 2). That is, in the present embodiment, the opening 24A'of the second member 24 is connected to the gas discharge pipe 94 instead of the gas discharge pipe 66 (see FIG. 1).

The opening 94A on the other end side of the gas discharge pipe 94 is arranged on the upstream side in the second combustion pipe 46B in the moving direction (arrow X1 direction) of the swirling flow Q.

Therefore, in the present embodiment, the pyrolysis gas 107 discharged from the second member 24 is directly supplied into the second combustion pipe 46B via the gas discharge pipe 94. The pyrolysis gas 107 may contain only the second gas 106.

The pyrolysis gas 107 supplied from the gas discharge pipe 94 is burned by the heat from the burner 50 and the air supplied from the air supply blower 51. Therefore, the heat gas 30 is generated in the second combustion pipe 46B of the heat gas supply unit 12B. The hot gas 30 moves in the second combustion pipe 46B along the moving direction (arrow X1 direction) of the swirling flow Q formed in the second combustion pipe 46B. Then, the hot gas 30 reaches the inside of the second waste heat pipe 48B via the grid-like member 47, and is supplied into the hot gas pipe 28 from the opening 28A of the hot gas pipe 28.

As described above, the raw material processing apparatus 10B of the present embodiment has a thermal decomposition unit 11. Therefore, the raw material processing apparatus 10B of the present embodiment has the same effect as that of the first embodiment.

Further, the raw material processing apparatus 10B of the present embodiment directly supplies the pyrolysis gas 107 recovered from the second pyrolysis unit 22 to the combustion furnace 46 of the heat gas supply unit 12.

Therefore, compared to the case where the fuel 110 obtained by cooling the pyrolysis gas 107 is supplied to the combustion furnace 46, the pyrolysis gas 107 can be burned more efficiently and the heat gas 30 can be generated. Further, by burning the pyrolysis gas 107, it is possible to suppress the generation of dust during combustion. Further, compared to the case of burning the fuel 110, energy for gasifying the liquid is not required at the time of combustion.

Therefore, the raw material processing apparatus 10B of the present embodiment can obtain the second gas 106 to be recovered more efficiently in addition to the effect of the above-described embodiment.

The raw material processing apparatus may be configured by combining the raw material processing apparatus 10 of the first embodiment and the raw material processing apparatus 10B of the second embodiment. In this case, the raw material processing apparatus 10 (see FIG. 1) of the first embodiment may be further provided with the gas discharge pipe 94 (see FIG. 4) in the raw material processing apparatus 10B of the present embodiment. Then, for example, switching for switching so that the pyrolysis gas 107 is supplied from the second member 24 to the gas discharge pipe 94 and from the second member 24 to the gas discharge pipe 66 of the recovery unit 14. It is also possible to have a configuration provided with a mechanism.

(Modification 1)
In the first embodiment, the first member 16 and a part of the hot gas pipe 28 function as the first pyrolysis unit 20, and the second member 24 and a part of the hot gas pipe 28 have a second heat. The form that functions as the disassembling unit 22 has been described.

However, the first pyrolysis unit 20 and the second pyrolysis unit 22 are not limited to the above configuration.

FIG. 5 is a schematic view showing an example of the raw material processing apparatus 10C of this modification.

The raw material processing apparatus 10C includes a thermal decomposition unit 11C. The pyrolysis unit 11C includes a first pyrolysis unit 20C and a second pyrolysis unit 22C.

The first pyrolysis unit 20C heats the raw material 100 at the first temperature and heats the raw material 100 to the first gas 102 and the first residue 104, similarly to the first thermal decomposition unit 20 of the first embodiment. Disassemble.

In this modification, the first pyrolysis unit 20C has a first member 16C and a first thermal action unit 18C.

The first member 16C is a member for thermally decomposing the raw material 100 by applying heat of the first temperature. The raw material 100 is supplied to the inside of the first member 16C. In this modification, the raw material 100 and the inert gas are filled in the first member 16C in the state before the thermal decomposition occurs.

The first member 16C may have a shape that can hold the raw material 100 inside while maintaining an oxygen-free state, and the shape of the first member 16C is not limited. Further, the raw material supply unit 13 (see FIG. 1) of the first embodiment may be connected to the first member 16C, and the raw material 100 may be supplied from the raw material supply unit 13 to the first member 16C.

The first heat acting unit 18C applies heat of the first temperature into the first member 16C. In this modification, the first heat acting unit 18C heats the first member 16C so that the inside of the first member 16C becomes the first temperature. The first heat acting unit 18C may be any device that applies heat of the first temperature to the raw material 100 in the first member 16C. For example, the first heat acting unit 18C is a heating device such as a heater.

The second pyrolysis unit 22C heats the first residue 104 at the second temperature in the same manner as the second pyrolysis unit 22 of the first embodiment, and the first residue 104 is the second gas 106 and the second gas 106. 2 Pyrolyze into residue 108. In this modification, the second pyrolysis unit 22C includes a second member 24C and a second thermal action unit 26C.

The second member 24C is a member for further pyrolyzing the first residue 104 obtained by thermal decomposition by the first thermal decomposition unit 20C. The second member 24C is connected to the first member 16C. The first residue 104 is supplied to the second member 24C from the first member 16C. In this modification, the first residue 104 and the first gas 102 are supplied to the second member 24C from the first member 16C. The second member 24C may be connected to the first member 16C via another member.

The second member 24C may have a shape that can hold the first residue 104 inside while maintaining an oxygen-free state, and the shape of the second member 24C is not limited. A recovery pipe 99 for recovering the pyrolysis gas 107 is connected to the second member 24C.

The second heat acting unit 26C applies heat of the second temperature into the second member 24C. In this modification, the second heat acting unit 26C heats the second member 24C so that the inside of the second member 24C becomes the second temperature. The second heat acting unit 26C may be any device that applies heat of the second temperature to the first residue 104 in the second member 24C. For example, the second heat acting unit 26C is a heating device such as a heater.

Next, the operation of the raw material processing apparatus 10C of this modification will be described.

In the raw material processing apparatus 10C of this modification, the first thermal action section 18C of the thermal decomposition section 11C heats the first member 16C filled with the raw material 100. By this heating, heat of the first temperature is applied to the inside of the first member 16C. Therefore, the raw material 100 in the first member 16C is heated to the first temperature and thermally decomposed into the first gas 102 and the first residue 104.

The first gas 102 and the first residue 104 thermally decomposed by the first member 16C are supplied to the second member 24C connected to the first member 16C. Specifically, the pressure of the first gas 102 generated in the first member 16C causes the first residue 104 and the first gas 102 to be supplied from the first member 16C to the second member 24C (direction of arrow X'). reference).

The second heat acting unit 26C heats the second member 24C. By this heating, heat of the second temperature acts in the second member 24C. Therefore, the first residue 104 in the second member 24C is thermally decomposed into the second residue 108 and the second gas 106.

Then, the thermally decomposed second gas 106 is recovered via the recovery pipe 99. For example, as the recovery pipe 99, the gas discharge pipe 66 of the recovery unit 14 described in the first embodiment may be used (see FIG. 1).

As described above, the raw material 100 and the first residue 104 may be thermally decomposed by heating the first member 16C and the second member 24C using a heating device instead of the heat gas 30.

Also in this modification, the raw material processing apparatus 10C thermally decomposes the raw material 100 into the first gas 102 and the first residue 104 by heating the raw material 100 to the first temperature. Then, the raw material processing apparatus 10C heats the first residue 104 obtained by the thermal decomposition at the second temperature and thermally decomposes it into the second gas 106 and the second residue 108. By such two-step thermal decomposition, the raw material processing apparatus 10C obtains the second gas 106 to be recovered.

Therefore, in the raw material processing apparatus 10C of the present modification, the pyrolysis gas (second gas 106) to be recovered can be efficiently obtained as in the above embodiment.

The thermal decomposition unit 11C is not limited to the configuration in which the first member 16C and the second member 24C are connected. For example, the first member 16C and the second member 24C may be separated from each other. In this case, the first residue 104 generated by the thermal decomposition of the raw material 100 may be taken out and supplied into the second member 24C by using a known mechanism.

(Modification 2)
In the above embodiment, the first member 16 of the first pyrolysis unit 20 and the second member 24 of the second pyrolysis unit 22 are directly connected to each other. Further, in the above embodiment, one second member 24 is connected to one first member 16.

However, the first member 16 and the second member 24 may be connected via another member. Further, a plurality of second members 24 may be connected to one first member 16.

FIG. 6 is a schematic view showing an example of the raw material processing apparatus 10D of this modification.

The raw material processing apparatus 10D includes a thermal decomposition unit 11D, a raw material supply unit 13, a hot gas supply unit 12, and a recovery unit 14. The raw material processing apparatus 10D has the same configuration as the raw material processing apparatus 10 of the first embodiment except that the thermal decomposition unit 11D is provided in place of the thermal decomposition unit 11. FIG. 6 shows a part of the pyrolysis unit 11D and the heat gas supply unit 12 in an enlarged manner.

The thermal decomposition unit 11D thermally decomposes the raw material 100. The thermal decomposition unit 11D includes a hot gas pipe 28, a first member 16, a second member 25, and a connecting pipe 96.

The hot gas pipe 28 and the first member 16 are the same as those in the first embodiment. The second member 25 is the same as the second member 24 of the first embodiment.

In this modification, the opening 16B of the first member 16 is connected to the connecting pipe 96 instead of the second member 24. One end of the connecting pipe 96 is connected to the first member 16. The other end of the connecting pipe 96 is connected to the second member 25. A part of the connecting pipe 96 may be arranged outside the heat gas pipe 28 and the waste heat portion 48.

In this modification, the raw material processing apparatus 10D has a plurality of second members 25 (second member 25A, second member 25B, second member 25C). FIG. 6 shows three second members 25 as an example. However, the number of the second member 25 connected to the first member 16 via the connecting pipe 96 may be two or more, and is not limited to three.

The configuration of each of the plurality of second members 25 (second member 25A, second member 25B, second member 25C) is the same as that of the second member 24 described in the first embodiment. However, these plurality of second members 25 (second member 25A, second member 25B, second member 25C) are connected to the opening 16B of the first member 16 via the connecting pipe 96.

Further, in this modification, these plurality of second members 25 (second member 25A, second member 25B, second member 25C) are arranged in the second waste heat tube 48B of the waste heat portion 48. For example, the plurality of second members 25 are arranged at predetermined intervals along the supply direction of the heat gas 30 (directions of arrows X1 and X3 in FIG. 6).

That is, also in this modification, the second member 25 is arranged on the upstream side in the supply direction of the heat gas 30 from the first member 16. Therefore, as in the first embodiment, the second member 25 is arranged at a position where the heat gas 30 having a higher temperature than the first member 16 acts.

Further, in this modification, one end of the gas discharge pipe 66 of the recovery unit 14 is connected to the opening 24D communicating with the plurality of second members 25 instead of the opening 24A'(see FIG. 2). .. The opening 24D is provided, for example, on one end side of the connecting pipe 96.

In this modification, the longitudinal directions of the plurality of second members 25 intersect with the supply direction of the heat gas 30 (in the direction of arrow X1 in FIG. 6) in the waste heat portion 48. It is arranged like this. The longitudinal direction of each of the plurality of second members 25 may be the same as the supply direction.

In this modification, as in the first embodiment, the first member 16 and a part of the hot gas pipe 28 function as the first thermal decomposition unit 20. On the other hand, in this modification, a part of the plurality of second members 25 and the waste heat unit 48 functions as the second thermal decomposition unit 22D.

The second pyrolysis unit 22D heats the first residue 104 at the second temperature and thermally decomposes the first residue 104 into the second gas 106 and the second residue 108, similarly to the second pyrolysis unit 22. ..

The second pyrolysis unit 22D includes a plurality of second members 25 and a second thermal action unit 26D. In this modification, a part of the waste heat section 48 functions as the second heat action section 26D. Specifically, the region covering the plurality of second members 25 in the waste heat unit 48 and the heat gas 30 passing between the inner wall of the second waste heat tube 48B and the outer periphery of the second member 25 act as a second heat. It functions as a unit 26D.

The second heat acting unit 26D causes heat of the second temperature to act in the plurality of second members 25. In this modification, the heat gas 30 flows around each of the plurality of second members 25, so that heat of the second temperature is applied to each of the plurality of second members 25.

In the raw material processing apparatus 10D of the present modification configured as described above, heat of the first temperature acts on the raw material 100 supplied in the first member 16 by the hot gas 30 passing through the hot gas pipe 28. do. When the raw material 100 in the first member 16 is heated at the first temperature, it is thermally decomposed into a first gas 102 and a first residue 104.

Then, due to the pressure of the first gas 102 generated in the first member 16, the first residue 104 and the first gas 102 are sent from the first member 16 to each of the plurality of second members 25 via the connecting pipe 96. Will be supplied.

The first gas 102 supplied to each of the plurality of second members 25 is recovered by the recovery unit 14 via the gas discharge pipe 66. On the other hand, the first residue 104 supplied to each of the plurality of second members 25 is heated to the second temperature by the hot gas 30, and is thermally decomposed into the second gas 106 and the second residue 108. The second gas 106 is recovered via the gas discharge pipe 66. The second residue 108 collects at the bottom of the second member 25.

As described above, the first member 16 and the second member 25 may be connected via other members. Further, a plurality of second members 25 may be connected to one first member 16.

Also in this modification, the raw material processing apparatus 10D includes a thermal decomposition unit 11D. The thermal decomposition unit 11D thermally decomposes the raw material 100 into the first gas 102 and the first residue 104 by heating the raw material 100 to the first temperature. Then, the thermal decomposition unit 11D heats the first residue 104 obtained by the thermal decomposition at a second temperature and thermally decomposes it into a second gas 106 and a second residue 108. By such two-step thermal decomposition, the raw material processing apparatus 10D obtains the second gas 106 to be recovered.

Therefore, the raw material processing apparatus 10D of the present modification can efficiently obtain the pyrolysis target gas (second gas 106) to be recovered, as in the above embodiment.

(Modification 3)
In the above embodiment, the embodiment in which the longitudinal direction of the hot gas pipe 28 coincides with the vertical direction (arrow Z direction, see FIG. 2) has been described.

However, the longitudinal direction of the hot gas pipe 28 is not limited to the direction corresponding to the vertical direction. The longitudinal direction of the hot gas pipe 28 may be a direction inclined with respect to the vertical direction.

FIG. 7 is a schematic view showing an example of the raw material processing apparatus 10E of this modification.

The raw material processing apparatus 10E includes a thermal decomposition unit 11E, a raw material supply unit 13, a hot gas supply unit 12, and a recovery unit 14. The raw material processing apparatus 10E has the same configuration as the raw material processing apparatus 10 of the first embodiment except that the thermal decomposition unit 11E is provided in place of the thermal decomposition unit 11. FIG. 7 shows an enlarged part of the pyrolysis unit 11E and the heat gas supply unit 12.

The thermal decomposition unit 11E thermally decomposes the raw material 100. In the thermal decomposition section 11E, the longitudinal directions of the heat gas pipe 28, the first member 16, and the second member 24 coincide with the longitudinal direction of the waste heat section 48. The longitudinal direction (arrow Y direction) of the waste heat portion 48 is a direction intersecting the vertical direction (arrow Z direction). For example, the longitudinal direction of the waste heat portion 48 is the horizontal direction. Except for this point, the thermal decomposition unit 11E has the same configuration as the thermal decomposition unit 11 of the first embodiment.

That is, in this modification, the hot gas pipe 28 is provided so that the longitudinal direction of the hot gas pipe 28 and the longitudinal direction of the first waste heat pipe 48A and the second waste heat pipe 48B constituting the waste heat portion 48 coincide with each other. Have been placed.

In this modification, the opening 28A of the hot gas pipe 28 is connected to the end face of the waste heat portion 48 on the downstream side in the supply direction (arrow X1 direction) of the hot gas 30. In other words, in this modification, the end face of the waste heat portion 48 on the downstream side in the supply direction of the hot gas 30 is open and connected to the hot gas pipe 28.

In the hot gas pipe 28, the second member 24 and the first member 16 are arranged in this order from the upstream side to the downstream side in the supply direction of the hot gas 30. That is, as in the first embodiment, the second member 24 is arranged at a position where the heat gas 30 having a higher temperature than the first member 16 acts.

Then, as in the above embodiment, in the raw material processing apparatus 10E, the heat gas 30 at the first temperature acts on the first member 16, and the heat gas 30 at the second temperature acts on the second member 24. The shape, length, diameter, material, combustion conditions of the combustion furnace 46, and the like are adjusted in advance for the first member 16, the second member 24, the hot gas pipe 28, and the combustion furnace 46.

Therefore, the thermal decomposition unit 11E of the raw material processing apparatus 10E of the present modification heats the raw material 100 to the first temperature to thermally decompose it into the first gas 102 and the first residue 104. Then, the thermal decomposition unit 11E heats the first residue 104 obtained by the thermal decomposition at the second temperature, and thermally decomposes the first residue 104 into the second gas 106 and the second residue 108. By such two-step thermal decomposition, the raw material processing apparatus 10E obtains the second gas 106 to be recovered.

Therefore, the raw material processing apparatus 10E of the present modification can efficiently obtain the pyrolysis target gas (second gas 106) to be recovered, as in the above embodiment.

(Modification example 4)
In the above embodiment, the first member 16 and the second member 24 are arranged inside the heat gas pipe 28. However, the heat gas pipe 28 may be arranged inside the first member 16 and the second member 24.

FIG. 8 is a schematic view showing an example of the raw material processing apparatus 10F of this modification. The raw material processing apparatus 10F has the same configuration as the raw material processing apparatus 10 of the first embodiment except that the thermal decomposition unit 11F is provided in place of the thermal decomposition unit 11. FIG. 8 shows an enlarged schematic view of the thermal decomposition section 11F.

The thermal decomposition unit 11F thermally decomposes the raw material 100. In this modification, the thermal decomposition unit 11F includes a hot gas pipe 28F, a first member 16, and a second member 24. The first member 16 and the second member 24 are the same as those in the first embodiment.

The hot gas pipe 28F is a tubular member. The hot gas pipe 28F has openings at both ends. The hot gas pipe 28F is supplied with hot gas 30 from the opening 28G on one end side. The opening 28G is provided on the end face of the hot gas pipe 28F on the upstream side in the supply direction (arrow X3 direction) of the hot gas 30. The hot gas 30 supplied to the hot gas pipe 28F passes through the hot gas pipe 28F and is discharged from the opening on the other end side of the hot gas pipe 28F.

In this modification, the heat gas pipe 28F is arranged inside the first member 16 and the second member 24. The outer diameter of the hot gas pipe 28F is smaller than the inner diameter of the first member 16 and the second member 24. The inner diameter of the hot gas pipe 28F may be such that the hot gas 30 can pass through the inside.

The hot gas pipe 28F is provided so as to penetrate the inside of the first member 16 and the second member 24 connected along the supply direction of the hot gas 30 from one end side to the other end side.

The second member 24 is arranged on the upstream side of the first member 16 in the supply direction (arrow X3 direction) of the heat gas 30. Therefore, the heat of the hot gas 30 having a higher temperature than that of the first member 16 acts on the second member 24. The heat of the second temperature acts on the inside of the second member 24 by the heat gas 30 passing through the heat gas pipe 28F provided inside the second member 24. Further, the heat of the first temperature acts on the inside of the first member 16 by the heat gas 30 passing through the heat gas pipe 28F provided inside the first member 16.

In this modification, a part of the hot gas pipe 28F functions as the first thermal action section 18F of the first thermal decomposition section 20F, as in the above embodiment. Further, a part of the hot gas pipe 28F functions as a second thermal action section 26F of the second thermal decomposition section 22F.

However, in this modification, the heat gas 30 passing through the region covered by the first member 16 in the heat gas pipe 28F functions as the first heat acting portion 18F. Further, in this modification, the heat gas 30 passing through the region covered by the second member 24 in the heat gas pipe 28F functions as the second heat acting portion 26F.

In this way, the heat of the heat gas 30 may be applied to the first member 16 and the second member 24 from the inside of each of the first member 16 and the second member 24.

Also in this modification, the heat of the second temperature is applied to the inside of the second member 24, and the heat of the first temperature is applied to the inside of the first member 16.

Therefore, the thermal decomposition section 11F of the raw material processing apparatus 10F of the present modification heats the raw material 100 to the first temperature to thermally decompose it into the first gas 102 and the first residue 104. Then, the thermal decomposition unit 11F heats the first residue 104 obtained by the thermal decomposition at a second temperature and thermally decomposes it into a second gas 106 and a second residue 108. By such two-step thermal decomposition, the raw material processing apparatus 10F obtains the second gas 106 to be recovered.

Therefore, the raw material processing apparatus 10F of the present modification can efficiently obtain the pyrolysis target gas (second gas 106) to be recovered, as in the above embodiment.

Although the embodiments and modifications of the present invention have been described above, these embodiments and modifications are presented as examples and are not intended to limit the scope of the invention. These novel embodiments and modifications can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

10, 10B, 10C, 10D, 10E, 10F ... Raw material processing equipment, 12, 12B ... Heat gas supply unit, 14 ... Recovery unit, 16 ... 1st member, 18, 18F ... 1st thermal action unit, 20, 20C, 20F ... 1st thermal decomposition section, 22, 22C, 22D, 22F ... 2nd thermal decomposition section, 24, 25, 25A, 25B, 25C ... 2nd member, 26, 26F ... 2nd thermal action section

Claims (7)

A first pyrolysis unit that heats the raw material at the first temperature and thermally decomposes the raw material into a first gas and a first residue.
The first residue is heated at a second temperature higher than the first temperature and at a second temperature higher than the thermal decomposition temperature at which the first residue is thermally decomposed into a second gas to be recovered and the second residue, and the first residue is subjected to the above. A second pyrolysis unit that thermally decomposes into the second gas and the second residue,
Equipped with
The first pyrolysis unit is
The first member to which the raw material is supplied and
A first heat acting portion that causes heat of the first temperature to act in the first member,
Have,
The second pyrolysis section is
A second member connected to the first member and supplied with the first residue,
A second heat acting portion that causes heat of the second temperature to act in the second member,
Have,
The first member and the second member are tubular and have a tubular shape.
The inner diameter of the first member is smaller than the inner diameter of the second member.
Raw material processing equipment. The raw material processing apparatus according to claim 1 , wherein the first member has a shape that is at least partially bent. Equipped with a hot gas pipe to which hot gas is supplied from one end side
The first member and the second member are arranged in the heat gas pipe, and the first member and the second member are arranged in the heat gas pipe.
The second member is arranged on the upstream side in the heat gas supply direction from the first member in the heat gas pipe.
The first heat acting unit causes the heat of the first temperature to act on the first member by the hot gas in the hot gas pipe.
The second heat acting unit causes the heat of the second temperature to act on the second member by the hot gas in the hot gas pipe.
The raw material processing apparatus according to claim 1 or 2 . A hot gas supply unit for supplying the hot gas generated by the combustion of the second gas to the hot gas pipe is provided.
The raw material processing apparatus according to claim 3 . A recovery unit for recovering the second gas from the second thermal decomposition unit is provided.
The raw material processing apparatus according to any one of claims 1 to 4 . The longitudinal direction of the hot gas pipe coincides with the vertical direction,
The hot gas moves in the hot gas pipe from the downstream side to the upstream side in the vertical direction.
The raw material is supplied to the first member in a direction opposite to the hot gas supply direction, which is the moving direction of the hot gas in the hot gas pipe.
The first residue is supplied to the second member from the first member in a direction opposite to the supply direction of the hot gas in the hot gas pipe.
The raw material processing apparatus according to claim 3 or 4. A first pyrolysis step in which the raw material is heated at a first temperature and the raw material is thermally decomposed into a first gas and a first residue.
The first residue is heated at a second temperature higher than the first temperature and at a second temperature higher than the thermal decomposition temperature at which the first residue is thermally decomposed into a second gas to be recovered and the second residue, and the first residue is subjected to the above. A second pyrolysis step of thermally decomposing the second gas and the second residue,
Including
The first pyrolysis step is
The heat of the first temperature is allowed to act in the first member to which the raw material is supplied.
The second pyrolysis step is
The heat of the second temperature is allowed to act in the second member which is connected to the first member and is supplied with the first residue.
The first member and the second member are tubular and have a tubular shape.
The inner diameter of the first member is smaller than the inner diameter of the second member.
Raw material processing method.

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