JP2016059260A - Manufacturing facility train of steel mill and thermoelectric power generation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restore thermal energy of a steel material efficiently and inexpensively, without using any complicated control.SOLUTION: A thermoelectric power generation device 100 is arranged at at least one position between a slub cooler and a slub cutting device, on the lower surface of the slub cutting device, and on the exit side of the slub cutting device. The thermoelectric power generation device 100 includes a heat storage plate 101 arranged at a position capable of storing the heat of a slub S, and a thermoelectric power generation unit 102 arranged in the width direction of the slub S, while including a plurality of thermoelectric power generation modules 102a-f arranged oppositely to the heat storage plate 101, and converting the heat stored by the heat storage plate 101 into electric power by using the plurality of thermoelectric power generation modules 102a-f.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a manufacturing facility line of a steelworks including one or a plurality of thermoelectric power generation devices that convert thermal energy of a steel material into electrical energy, and a thermoelectric power generation method using the manufacturing facility line.

  It has long been known as the Seebeck effect that an electromotive force is generated when a temperature difference is given between different kinds of conductors or semiconductors, and a thermoelectric power generation element that converts thermal energy into electrical energy using the Seebeck effect has been proposed. . On the other hand, in recent years, in manufacturing facilities such as steel factories, efforts have been promoted to recover heat energy, which has been discarded as waste heat, by using thermoelectric power generation elements as electric energy.

  From such a background, Patent Document 1 discloses a thermoelectric power generation method in which a heat receiving device is disposed relative to a high temperature object, and heat energy of the high temperature object is converted into electric energy and recovered using the heat receiving device. Proposed. Further, Patent Document 2 proposes a thermoelectric power generation method in which heat energy is converted into electric energy and recovered by bringing a thermoelectric element module into contact with heat energy processed as waste heat.

JP 59-198883 A JP 60-34084 A

  Patent Document 1 has a description that the thermoelectric power generation method described in Patent Document 1 can be applied to a slab casting line. However, in the thermoelectric power generation method described in Patent Document 1, changes in the amount of heat released from the heat source due to changes in operating conditions, such as changes in the amount of heat released from the heat source due to changes in the temperature of the slab in actual operation and changes in the amount of processing, are taken into account. Absent. For this reason, it is difficult to apply the thermoelectric power generation method described in Patent Document 1 to a slab casting line. Moreover, in the thermoelectric power generation method described in Patent Document 2, since it is necessary to fix the thermoelectric element module to the heat source, it is not possible to recover the thermal energy from the moving heat source like a continuous casting facility.

  In the case of converting the thermal energy of the slab into electrical energy and recovering it in the continuous casting process, it is necessary to pay attention to the following points. First, since the cooling temperature of the slab varies from slab to slab in order to satisfy the performance required for the final product, the temperature of the slab varies at the location where the thermoelectric generator is installed. Second, the width of the slab changes depending on the size of the final product.

  In the thermoelectric generator, not only the temperature at which the maximum output can be obtained but also the endurance temperature is determined, and if heat exceeding the endurance temperature is applied, the thermoelectric generator will break down. However, if the location of the thermoelectric generator is determined based on the case where the temperature of the slab is high or the width of the slab is large in order to suppress the failure of the thermoelectric generator, the case where the temperature of the slab is low or the width of the slab Is narrow, it is impossible to efficiently recover thermal energy by fully utilizing the performance of the thermoelectric generator.

  On the other hand, if the location of the thermoelectric generator is determined based on the case where the slab temperature is low or the slab width is narrow considering the heat energy recovery efficiency, the slab temperature is high or the slab When the width of the thermoelectric generator is wide, there is a possibility that the thermoelectric power generator is damaged by heat applied to the thermoelectric generator that is higher than the endurance temperature.

  In order to solve such a problem, a thermoelectric power generation device is configured by a plurality of thermoelectric power generation elements arranged in the width direction of the slab, and the height of the plurality of thermoelectric power generation elements is set according to the temperature and width of the slab. It is conceivable to use a method of controlling them independently of each other. However, when this method is used, the control becomes complicated and the equipment cost increases.

  The present invention has been made in view of the above-described problems, and its purpose is to provide a steelworks manufacturing facility line that can efficiently and inexpensively recover the thermal energy of steel materials without using complicated control. And providing a thermoelectric power generation method.

  The manufacturing facility sequence of a steel mill according to the present invention is a manufacturing facility sequence of a steel plant including one or a plurality of thermoelectric power generation devices that convert thermal energy of a steel material into electrical energy, and the thermoelectric power generation device is a steel material. A heat storage plate arranged at a position where heat can be stored, and a plurality of thermoelectric power generation modules arranged in the width direction of the steel material and arranged opposite to the heat storage plate, using the plurality of thermoelectric power generation modules And a thermoelectric power generation unit that converts heat stored in the heat storage plate into electric power.

  The manufacturing facility row of the steelworks according to the present invention, in the above invention, includes a moving means for moving at least one of the heat storage plate and the thermoelectric power generation unit relative to the steel material, and a width and / or temperature of the steel material. And a control means for changing a distance between the steel material and at least one of the heat storage plate and the thermoelectric power generation unit by controlling the moving means.

  The manufacturing facility row of the steelworks according to the present invention is the above-described invention, wherein the heat storage plate is controlled by controlling the cooling means according to the cooling means for cooling the heat storage plate and the width and / or temperature of the steel material. And a control means for changing the cooling amount.

  In the above-mentioned invention, the steel plant manufacturing facility line according to the present invention is characterized in that the heat storage plate in the width direction of the steel material is not less than the maximum width of the steel material.

  In the above-described invention, the steel plant manufacturing facility line according to the present invention is characterized in that a length of the heat storage plate in the casting direction of the steel material is not less than a length of the thermoelectric power generation module in the casting direction of the steel material. .

  In the above-described invention, the steel plant manufacturing facility line according to the present invention is characterized in that the heat storage plate is formed of any one of a metal material, stainless steel, and an inorganic material.

  The manufacturing facility row of the steelworks according to the present invention is a continuous casting facility row in which the manufacturing facility row continuously casts a slab provided with a slab cooling device and a slab cutting device in the above invention, and the thermoelectric generator is The steel material is a slab, disposed between at least one of the slab cooling device and the slab cutting device, between the lower surface of the slab cutting device and the exit side of the slab cutting device. To do.

  The thermoelectric power generation method according to the present invention is characterized in that thermoelectric power generation is performed by receiving the heat of the steel material using the production facility line of the steel mill according to the present invention.

  According to the manufacturing facility line and the thermoelectric power generation method of the steelworks according to the present invention, it is possible to recover the thermal energy of the steel material efficiently and inexpensively without using complicated control.

FIG. 1 is a schematic diagram showing a configuration of a continuous casting equipment line according to an embodiment of the present invention. FIG. 2 is a plan view showing a configuration of a thermoelectric power generator according to an embodiment of the present invention. FIG. 3 is a schematic diagram illustrating a configuration of the thermoelectric power generation module illustrated in FIG. 2. FIG. 4 is a block diagram showing the configuration of the control system according to the first embodiment of the present invention. FIG. 5 is a schematic diagram showing a change in the position of the heat storage plate accompanying a change in the width of the slab. FIG. 6 is a diagram illustrating a change in output of the thermoelectric power generation module accompanying a change in the width of the slab. FIG. 7 is a block diagram showing a configuration of a control system according to the second embodiment of the present invention. FIG. 8 is a schematic diagram showing a change in the cooling amount of the slab accompanying a change in the width of the slab. FIG. 9 is a schematic diagram showing the configuration of the hot rolling facility.

  The present invention relates to an iron manufacturing apparatus that includes one or more thermoelectric generators that convert thermal energy of steel materials into electrical energy, such as a continuous casting equipment line that continuously casts a slab including a slab cooling device and a slab cutting device. It can be applied to a manufacturing equipment line. As a manufacturing facility row of the steelworks to which the present invention can be applied, a hot rolling facility row for producing hot-rolled steel sheets is also conceivable. However, since the slab is discontinuously extracted from the heating furnace, the heat source is constant. It is not a condition. For this reason, it is desirable to apply this invention to the continuous casting equipment row | line where the slab which is a heat source is continuously cast.

  Hereinafter, with reference to drawings, the continuous casting equipment sequence which is one embodiment of the present invention is explained in detail.

[Construction of continuous casting equipment line]
First, with reference to FIG. 1, the structure of the continuous casting equipment row | line | column which is one Embodiment of this invention is demonstrated. FIG. 1 is a schematic diagram showing a configuration of a continuous casting equipment line according to an embodiment of the present invention.

  As shown in FIG. 1, a continuous casting equipment row 1 according to an embodiment of the present invention includes a ladle 2, a tundish 3, a mold 4, a slab cooling device 5, a roller group 6, a slab cutting device 7, and a dummy bar table. 8 is provided. When manufacturing a slab using this continuous casting equipment line 1, first, the ladle 2 in which molten steel was put is conveyed to the uppermost part of the continuous casting equipment line 1. FIG. Next, after inserting a dummy bar into the mold 4, molten steel is poured into the mold 4 from the bottom of the tundish 3. The molten steel in contact with the mold 4 is solidified from the surface, cooled by the slab cooling device 5, and then conveyed by the roll group 6 to become a slab. At this time, the dummy bar is collected by the dummy bar table 8. Thereafter, the slab is cut into a predetermined length by the slab cutting device 7.

  The continuous casting equipment row 1 having such a configuration includes a thermoelectric power generation device in order to convert the thermal energy of the slab into electrical energy and recover it. Hereinafter, with reference to FIG. 2, FIG. 3, the structure of the thermoelectric power generator which is one Embodiment of this invention is demonstrated.

[Configuration of thermoelectric generator]
FIG. 2 is a plan view showing a configuration of a thermoelectric power generator according to an embodiment of the present invention. FIG. 3 is a schematic diagram illustrating a configuration of the thermoelectric power generation module illustrated in FIG. 2.

  A thermoelectric power generation device 100 according to an embodiment of the present invention includes a region R shown in FIG. 1, that is, a slab cooling device 5 and a slab cutting device 7, a lower surface of the slab cutting device 7, and an exit side of the slab cutting device 7. At least one of the positions.

  As shown in FIG. 2, a thermoelectric power generation apparatus 100 according to an embodiment of the present invention includes a heat storage plate 101 and a thermoelectric power generation unit 102 as main components.

  The heat storage plate 101 is formed of a member capable of storing heat, such as a metal material, stainless steel, or inorganic material, and is disposed at a position where heat released by the slab S such as a position facing the slab S can be stored. In addition, when the hot power generation device 100 is disposed at a position where the slab S such as the lower surface of the slab cutting device 7 stays, the heat storage plate 101 is inorganic such as a refractory so that more heat can be stored. It is desirable that it is made of a material.

  The length L1 in the direction orthogonal to the casting direction of the heat storage plate 101 (the width direction of the slab S) is equal to or greater than the minimum width of the slab S manufactured in the continuous casting equipment row 1, and in this embodiment is equal to or greater than the maximum width W of the slab S. Designed to the length of Thereby, about all the slabs S manufactured in the continuous casting equipment row | line | column 1, the heat from the width direction edge part of the slab S can also be heat-stored. Moreover, the width (length in the casting direction) W1 of the heat storage plate 101 is designed to be equal to or longer than the length W2 in the casting direction of the thermoelectric power generation unit 102.

  The thermoelectric power generation unit 102 is configured by a plurality of thermoelectric power generation modules 102 a to 102 f arranged along the width direction of the slab S, and can absorb heat stored in the heat storage plate 101 such as a position facing the heat storage plate 101. Placed in position. As shown in FIG. 3, the thermoelectric power generation modules 102 a to 102 f two-dimensionally arrange thermoelectric element groups in which P-type and N-type semiconductors that are thermoelectric elements 111 are connected by tens to hundreds of pairs of electrodes 112. The insulator 113 is disposed outside the electrode 112.

  Heat receiving means 114 is arranged on the surface of the insulator 113 on the side that absorbs the heat stored in the heat storage plate 101, and heat radiating means 115 is arranged on the surface of the insulator 113 on the opposite side. In addition, a heat conductive sheet or a protective plate may be provided on both sides or one side of the thermoelectric power generation modules 102a to 102f, and the heat conductive sheet or the protective plate may be used as the heat receiving means 114 or the heat radiating means 115. Further, when the heat receiving means 114 and / or the heat radiating means 115 is an insulator or a member whose surface is covered with an insulator, the heat receiving means 114 and / or the heat radiating means 115 may be substituted for the insulator 113.

  The temperature of the heat receiving means 114 when absorbing the heat stored in the heat storage plate 101 is several degrees to several tens degrees higher than the temperature on the high temperature side of the thermoelectric element 111, and in some cases, about several hundred degrees depending on the material. . For this reason, the heat receiving means 114 is formed of a material having heat resistance and durability at the temperature. For example, the heat receiving means 114 is made of a general steel material in addition to copper, copper alloy, aluminum, aluminum alloy, ceramics.

  As the heat radiating means 115, a cooling device provided with fins, a water cooling device utilizing contact heat transfer, a heat sink utilizing boiling heat transfer, a water cooling plate having a refrigerant flow path, or the like can be used. Moreover, the low temperature side of the thermoelectric power generation modules 102a to 102f can be efficiently cooled by water cooling the low temperature side of the heat dissipating means 115 by spray cooling or the like.

  In particular, when the thermoelectric power generation modules 102a to 102f are installed below the slab S, even if spray cooling is applied, if the spray is properly arranged, the remaining water falls under the table, so the heating surface of the slab S is cooled. Without this, the low temperature side of the thermoelectric power generation modules 102a to 102f is efficiently cooled. When spray cooling is performed, the side to be cooled by contact with the spray refrigerant is the heat dissipating means.

  The thermal contact resistance between the members is reduced at a position such as between the heat receiving means 114 and the insulator 113, between the insulator 113 and the heat radiating means 115, between the insulator 113 and the protective plate, etc. In order to further improve the efficiency, a heat conductive sheet may be arranged. The thermal conductive sheet is not particularly limited as long as it has a predetermined thermal conductivity and can be used under the usage environment of the thermoelectric element 111, but a graphite sheet and the like can be exemplified.

Further, the size of the thermoelectric power generation modules 102a to 102f is preferably 1 × 10 ⁻² [m ² ] or less, more preferably 2.5 × 10 ⁻³ [m ² ] or less. The deformation of the thermoelectric power generation modules 102a to 102f can be suppressed by setting the size of the thermoelectric power generation modules 102a to 102f to the above-described size. The size of the thermoelectric generator unit 102 is 1 [m ² ] or less, more preferably 2.5 × 10 ⁻¹ [m ² ] or less. By setting the size of the thermoelectric power generation unit 102 to 1 [m ² ] or less, it is possible to suppress deformation between the thermoelectric power generation modules 102a to 102f and the thermoelectric power generation modules 102a to 102f themselves.

  Moreover, in this thermoelectric power generation apparatus 100, since the heat storage plate 101 is disposed between the slab S and the thermoelectric power generation unit 102, even if some component falls from the thermoelectric power generation unit 102, It is possible to suppress the slab S from being damaged and becoming defective.

[Control system configuration]
Next, the configuration of the control system of the thermoelectric generator 100 will be described.

[First Embodiment]
First, the configuration of the control system according to the first embodiment of the present invention will be described with reference to FIGS.

  FIG. 4 is a block diagram showing the configuration of the control system according to the first embodiment of the present invention. As shown in FIG. 4, the control system 120 according to the first embodiment of the present invention includes a slab width meter 121, a plate thermometer 122, a control device 123, and an elevating mechanism 124.

  The slab width meter 121 is configured by, for example, a light receiver and a light projector that are disposed to face the upper and lower surfaces of the slab S, and is installed on the upstream side in the casting direction of the thermoelectric generator 100. The slab width meter 121 measures the width of the slab S and inputs information related to the measured width of the slab S to the control device 123.

  The plate thermometer 122 is composed of a contact thermometer such as a thermocouple or a non-contact thermometer such as a radiation thermometer. The plate thermometer 122 measures the temperature of the heat storage plate 101 and inputs information on the measured temperature of the heat storage plate 101 to the control device 123.

  The control device 123 is configured by an information processing device such as a microcomputer or a personal computer. The control device 123 controls the operation of the elevating mechanism 124 based on the information regarding the width of the slab S input from the slab width meter 121 and the information regarding the temperature of the heat storage plate 101 input from the plate thermometer 122.

  The elevating mechanism 124 adjusts the distance between the heat storage plate 101 and / or the thermoelectric generation module 102 and the slab S by moving the heat storage plate 101 and / or the thermoelectric generation unit 102 relatively up and down with respect to the slab S. .

  The control system 120 having such a configuration recovers the thermal energy of the slab S by operating as described below. Hereinafter, the operation of the control system 120 when recovering the thermal energy of the slab S will be described with reference to FIGS.

  FIG. 5 is a schematic diagram showing a change in the position of the heat storage plate 101 accompanying a change in the width of the slab S. FIG. 6 is a diagram showing a change in the output of the thermoelectric power generation module accompanying a change in the width of the slab S.

  In the continuous casting process, the width of the slab S often changes, and when the width of the thermoelectric power generation unit 102 is designed in accordance with the wide slab S, heat is generated from the narrow slab S as shown by a broken line in FIG. When recovering energy, the output of the thermoelectric power generation modules 102a to 102f decreases as going to the end side of the thermoelectric power generation unit 102. This is because the distance between the slab S and the thermoelectric power generation modules 102a to 102f increases as going to the end of the thermoelectric power generation unit 102.

  In order to solve such problems, it is conceivable that the thermoelectric power generation modules (for example, thermoelectric power generation modules 102a and 102f) on the end side of the thermoelectric power generation unit 102 are brought closer to the slab S. It is necessary to provide an elevating mechanism for each module, which requires complicated control and high costs.

  Therefore, in this embodiment, as shown in FIG. 5A, the width of the slab S measured by the slab width meter 121 is less than the reference value or the temperature of the heat storage plate 101 measured by the plate thermometer 122 is the reference value. If it is less, the control device 123 controls the lifting mechanism 124 to lower the position of the heat storage plate 101 disposed between the slab S and the thermoelectric generation unit 102 from the normal position P to the slab S side. That is, the control device 123 makes the distance between the slab S and the heat storage plate 101 shorter than normal.

  On the other hand, as shown in FIG. 5B, when the width of the slab S measured by the slab width meter 121 is equal to or greater than the reference value or the temperature of the heat storage plate 101 measured by the plate thermometer 122 is equal to or greater than the reference value. The control device 123 controls the elevating mechanism 124 to raise the position of the heat storage plate 101 from the normal position P to the thermoelectric generation unit 102 side. That is, the control device 123 makes the distance between the slab S and the heat storage plate 101 longer than usual.

  Thereby, since the length L1 of the heat storage plate 101 is designed to be longer than the width W of the slab S, the temperature of the heat storage plate 101 is controlled within a predetermined temperature range regardless of changes in the width or temperature of the slab S. be able to. Since the length L1 of the heat storage plate 101 is designed to be longer than the length L2 of the thermoelectric power generation unit 102, the thermoelectric power generation modules 102a to 102f can receive the heat stored in the heat storage plate 101 evenly. .

  As a result, the output of the thermoelectric power generation modules 102a to 102f is suppressed from decreasing toward the end side of the thermoelectric power generation unit 102, and regardless of changes in the width or temperature of the slab S, as shown by the solid line in FIG. The outputs of the thermoelectric power generation modules 102a to 102f can be flattened. Thereby, the thermal energy which slab S has can be collect | recovered efficiently and cheaply, without using complicated control.

  In the above description, the elevating mechanism 124 moves the heat storage plate 101 up and down, but the same effect can be obtained by moving the thermoelectric power generation unit 102 or both the heat storage plate 101 and the thermoelectric power generation unit 102 up and down. it can.

[Second Embodiment]
Next, the configuration of the control system according to the second embodiment of the present invention will be described with reference to FIGS.

  FIG. 7 is a block diagram showing a configuration of a control system according to the second embodiment of the present invention. As shown in FIG. 7, the control system 120 according to the second embodiment of the present invention includes a slab width meter 121, a plate thermometer 122, a control device 123, and a cooling mechanism 125. Since the slab width meter 121 and the plate thermometer 122 have the same configuration as the slab width meter 121 and the plate thermometer 122 shown in FIG.

  The control device 123 is configured by an information processing device such as a microcomputer or a personal computer. The control device 123 controls the operation of the cooling mechanism 125 based on the information on the width of the slab S input from the slab width meter 121 and the information on the temperature of the heat storage plate 101 input from the plate thermometer 122.

  The cooling mechanism 125 is a mechanism that cools the heat storage plate 101 by an air cooling method or a water cooling method, and is configured to be able to control the cooling amount of the slab S.

  The control system 120 having such a configuration recovers the thermal energy of the slab S by operating as described below. Hereinafter, the operation of the control system 120 when recovering the thermal energy of the slab S will be described with reference to FIG.

  FIG. 8 is a schematic diagram showing a change in the position of the heat storage plate 101 accompanying a change in the width of the slab S. In this embodiment, as shown to Fig.8 (a), the width | variety of the slab S measured by the slab width meter 121 is less than a reference value, or the temperature of the heat storage board 101 measured by the plate thermometer 122 is less than a reference value. In some cases, the control device 123 controls the cooling mechanism 125 to reduce the cooling amount of the heat storage plate 101 from the normal time.

  On the other hand, as shown in FIG. 8B, when the width of the slab S measured by the slab width meter 121 is equal to or greater than the reference value or the temperature of the heat storage plate 101 measured by the plate thermometer 122 is equal to or greater than the reference value. The control device 123 controls the cooling mechanism 125 to increase the cooling amount of the heat storage plate 101 from the normal time.

  Thereby, since the length L1 of the heat storage plate 101 is designed to be longer than the width W of the slab S, the temperature of the heat storage plate 101 is controlled within a predetermined temperature range regardless of changes in the width or temperature of the slab S. The Since the length L1 of the heat storage plate 101 is designed to be longer than the length L2 of the thermoelectric power generation unit 102, the thermoelectric power generation modules 102a to 102f can receive the heat stored in the heat storage plate 101 evenly. .

  As a result, the output of the thermoelectric power generation modules 102a to 102f is suppressed from decreasing toward the end side of the thermoelectric power generation unit 102, and regardless of changes in the width or temperature of the slab S, as shown by the solid line in FIG. The outputs of the thermoelectric power generation modules 102a to 102f can be flattened. Thereby, the thermal energy which slab S has can be collect | recovered efficiently and cheaply, without using complicated control. In addition, when the thermoelectric power generation unit 100 is applied to the entry side of the rough rolling mill 201 of the hot rolling equipment having the rough rolling mill 201 and the finish rolling mill 202 shown in FIG. 9, similarly, without using complicated control, The thermal energy possessed by the slab S could be collected effectively and inexpensively. However, since the slab S extracted from the heating furnace was intermittent, the time rate at which the slab S was present above the thermoelectric power generation unit 100 was 50% compared with the case where the slab S was applied to a continuous casting facility, and recovered. The total amount of heat energy generated was also about 50%.

  The embodiment to which the invention made by the present inventors is applied has been described above, but the present invention is not limited by the description and the drawings that constitute a part of the disclosure of the present invention. That is, other embodiments, examples, operational techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Continuous casting equipment row 2 Ladle 3 Tundish 4 Mold 5 Slab cooling device 6 Roller group 7 Slab cutting device 8 Dummy bar table 100 Thermoelectric power generation device 101 Heat storage plate 102 Thermoelectric power generation unit 102a-f Thermoelectric power generation module 111 Thermoelectric element 112 Electrode 113 Insulator 114 Heat receiving means 115 Heat dissipating means 120 Control system 121 Slab width meter 122 Plate thermometer 123 Control device 124 Lifting mechanism 125 Cooling mechanism S Slab

Claims (8)

It is a manufacturing facility line of a steel mill that includes one or more thermoelectric generators that convert thermal energy of steel materials into electrical energy,
The thermoelectric generator is
A heat storage plate arranged at a position where the heat of the steel material can be stored;
A thermoelectric power generation unit that includes a plurality of thermoelectric power generation modules arranged in the width direction of the steel material and disposed opposite to the heat storage plate, and converts heat stored in the heat storage plate into electric power using the plurality of thermoelectric power generation modules. When,
A manufacturing facility line of an ironworks characterized by comprising:   A moving means for moving at least one of the heat storage plate and the thermoelectric power generation unit relative to the steel material, and the steel material and the steel by controlling the moving means according to the width and / or temperature of the steel material The steel plant manufacturing facility row according to claim 1, further comprising a control unit that changes a distance between the heat storage plate and at least one of the thermoelectric power generation units.   A cooling means for cooling the heat storage plate; and a control means for changing the cooling amount of the heat storage plate by controlling the cooling means according to the width and / or temperature of the steel material. The manufacturing facility row | line | column of the steel mill of Claim 1.   The length of the said heat storage board in the width direction of the said steel materials is more than the maximum width of the said steel materials, The manufacturing equipment row | line | column of any one of Claims 1-3 characterized by the above-mentioned.   5. The iron making according to claim 1, wherein a length of the heat storage plate in the casting direction of the steel material is equal to or longer than a length of the thermoelectric power generation module in the casting direction of the steel material. Manufacturing equipment column.   The said heat storage board is formed with the material in any one of a metal material, stainless steel, and an inorganic material, The manufacturing facility of the steel mill of any one of Claims 1-5 characterized by the above-mentioned. Column.   The manufacturing equipment row is a continuous casting equipment row for continuously casting a slab provided with a slab cooling device and a slab cutting device, and the thermoelectric generator is disposed between the slab cooling device and the slab cutting device. It is arrange | positioned in the position of at least one of the lower surface of a cutting device, and the exit side of the said slab cutting device, The said steel materials are slabs, The any one of Claims 1-6 characterized by the above-mentioned. Steel plant manufacturing equipment line.   A thermoelectric power generation method that performs thermoelectric power generation by receiving heat of the steel material using the production facility line of the steel mill according to any one of claims 1 to 7.

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