Thermoelectric power generation device and system based on utilization of low-temperature waste heat in iron and steel enterprises

Abstract

The utility model provides a thermoelectric power generation device based on utilization of low-temperature waste heat in iron and steel enterprises and a system thereof. The thermoelectric power generation device comprises a plurality of thermoelectric power generation modules, an aluminum alloy template fixing plate, a heat pipe radiator base and a heat pipe, all the thermoelectric power generation modules are nested on the aluminum alloy template fixing plate, positive and negative electrodes of all the thermoelectric power generation modules are sequentially connected in series, and the heat pipe radiator base is connected with the aluminum alloy template fixing plate. The hot end of the thermoelectric power generation module is in contact connection with the outer side wall of the medium and low temperature heat source pipeline, the cold end of the thermoelectric power generation module is in contact connection with the heat pipe radiator base, a plurality of heat pipes are supported on the heat pipe radiator base, and evaporation sections of the heat pipes are tightly attached to the heat pipe radiator base. The thermoelectric power generation device adopts a heat dissipation mode of a heat pipe. And compared with air cooling heat dissipation, the saturated liquid in the heat pipe is high in convective heat transfer coefficient, so that the heat dissipation efficiency is higher. And meanwhile, low-temperature waste heat in iron and steel enterprises can be recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of heat energy recovery in iron and steel enterprises, in particular to a thermoelectric power generation device and system based on the utilization of medium and low temperature waste heat in iron and steel enterprises. Background Art

[0002] Iron and steel enterprises generate a large amount of gas and liquid during production, and their waste heat is relatively large. At present, the resource recovery technology for high-temperature waste heat (>650°C) in iron and steel enterprises has been relatively mature. However, the proportion of medium-temperature waste heat (230°C - 650°C) resources and low-temperature waste heat (<230°C) resources is large, and the recovery efficiency of the application technology is low. Therefore, finding a technology that can effectively recover medium and low temperature waste heat is the future development trend. Content of the Utility Model

[0003] The main purpose of the utility model is to provide a thermoelectric power generation system based on the utilization of medium and low temperature waste heat in iron and steel enterprises, aiming to facilitate the recovery of medium and low temperature waste heat in iron and steel enterprises.

[0004] To achieve the above purpose, the utility model provides a thermoelectric power generation device based on the utilization of medium and low temperature waste heat in iron and steel enterprises, including a thermoelectric power generation module, an aluminum alloy template fixing plate, a heat pipe radiator base, and heat pipes. Among them,

[0005] A plurality of the thermoelectric power generation modules are provided, all the thermoelectric power generation modules are nested on the aluminum alloy template fixing plate, the positive and negative poles of all the thermoelectric power generation modules are connected in series in sequence, the hot end of the thermoelectric power generation module is in contact connection with the outer side wall of the medium and low temperature heat source pipeline, the cold end of the thermoelectric power generation module is in contact connection with the heat pipe radiator base, multiple heat pipes are supported on the heat pipe radiator base, and the evaporation section of the heat pipe is closely attached to the heat pipe radiator base.

[0006] Preferably, a heat conductive silicone grease layer is coated between the hot end of the thermoelectric power generation module and the outer wall of the medium and low temperature heat source pipeline.

[0007] Preferably, a heat conductive silicone grease layer is coated between the cold end of the thermoelectric power generation module and the heat pipe radiator base.

[0008] Preferably, the thermoelectric power generation device based on the utilization of medium and low temperature waste heat in iron and steel enterprises further includes heat dissipation fins sleeved outside the condensation ends of all the heat pipes to accelerate the heat dissipation and liquefaction of the gaseous saturated liquid.

[0009] Preferably, a plurality of the heat dissipation fins are provided.

[0010] Preferably, the aluminum alloy module fixing plate is welded to the medium and low temperature heat source pipeline.

[0011] Preferably, the thermoelectric power generation module includes a plurality of p-type thermoelectric materials, a plurality of n-type thermoelectric material copper sheets, and a heat-conducting ceramic sheet. The p-type thermoelectric materials and the n-type thermoelectric materials are connected by the copper sheets.

[0012] Preferably, a plurality of slots are formed in the aluminum alloy template fixing plate to correspond to a plurality of thermoelectric power generation modules. The thermoelectric power generation modules are supported above the slots by their extending wires.

[0013] The present utility model further provides a thermoelectric power generation system for utilizing medium and low temperature waste heat in iron and steel enterprises, including the above-mentioned thermoelectric power generation device for utilizing medium and low temperature waste heat in iron and steel enterprises, and further including a medium and low temperature heat source pipeline and an energy storage device electrically connected to the thermoelectric power generation device. The energy storage device includes a voltage stabilizer box and a lithium battery electrically connected thereto. The lithium battery is connected to a voltage regulator. Multiple sets of thermoelectric power generation devices are installed on the surface of the medium and low temperature heat source pipeline.

[0014] Preferably, a plurality of fins are installed on the inner wall of the medium and low temperature heat source pipeline to increase heat transfer.

[0015] The thermoelectric power generation device for utilizing medium and low temperature waste heat in iron and steel enterprises provided by the present utility model has the following beneficial effects:

[0016] (1) Adopt the heat dissipation method of heat pipes. Compared with air-cooled heat dissipation, the convective heat transfer coefficient of the saturated liquid inside the heat pipe is high, so the heat dissipation efficiency is higher. Compared with water-cooled heat dissipation, heat pipe heat dissipation does not require adding a water tank, water pipes, and water pumps to realize the cooling water circulation, reducing the space occupation and cost. At the same time, it can recover the medium and low temperature waste heat in iron and steel enterprises;

[0017] (2) Multiple layers of fins are installed on the condensation section of the heat pipe to increase the heat dissipation area, so the heat dissipation effect at the cold end of the thermoelectric power generation module is better;

[0018] (3) The thermoelectric power generation device adopted in this thermoelectric power generation device, which is composed of a thermoelectric power generation module, a heat pipe radiator, etc., has the characteristics of simple structure, good processing performance, strong plasticity, low operation cost, convenient maintenance, and long service life. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the thermoelectric power generation system for utilizing medium and low temperature waste heat in iron and steel enterprises according to the present utility model;

[0020] Figure 2 It is a schematic structural diagram of the thermoelectric power generation device for utilizing medium and low temperature waste heat in iron and steel enterprises according to the present utility model;

[0021] Figure 3 It is a schematic structural diagram of the series connection of multiple thermoelectric power generation modules in the thermoelectric power generation device for utilizing medium and low temperature waste heat in iron and steel enterprises according to the present utility model.

[0022] In the figure, 1 is a thermoelectric power generation device, 2 is a voltage stabilizer box, 3 is a lithium battery, 4 is a voltage regulator, 5 is an electrical equipment, 101 is a fin, 102 is a medium and low temperature heat source pipeline, 103 is a thermoelectric power generation module, 104 is an aluminum alloy module fixing plate, 105 is a heat pipe radiator base, 106 is a heat pipe, 107 is a heat dissipation fin, 201 is a p-type thermoelectric material, 202 is an n-type thermoelectric material, 203 is a copper sheet, and 204 is a heat-conducting ceramic sheet.

[0023] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0024] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0025] It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] The present utility model provides a thermoelectric power generation device based on the utilization of medium and low temperature waste heat in iron and steel enterprises.

[0027] Referring to Figure 2 and Figure 3 , in this preferred embodiment, a thermoelectric power generation device based on the utilization of medium and low temperature waste heat in iron and steel enterprises includes a thermoelectric power generation module 103, an aluminum alloy template fixing plate, a heat pipe 106 radiator base 105 and a heat pipe 106. Among them,

[0028] A plurality of thermoelectric power generation modules 103 are provided. All the thermoelectric power generation modules 103 are nested on the aluminum alloy template fixing plate. The positive and negative electrodes of all the thermoelectric power generation modules 103 are connected in series in sequence. The hot end of the thermoelectric power generation module 103 is in contact connection with the outer side wall of the medium and low temperature heat source pipeline 102. The cold end of the thermoelectric power generation module 103 is in contact connection with the heat pipe 106 radiator base 105. A plurality of heat pipes 106 are supported on the heat pipe 106 radiator base 105, and the evaporation section of the heat pipe 106 is closely attached to the heat pipe 106 radiator base 105.

[0029] Thermoelectric power generation technology utilizes thermoelectric materials with the Seebeck effect to convert low-grade thermal energy into high-grade electrical energy. Its working principle is that when there is a temperature difference between the hot end and the cold end of the thermoelectric power generation module, the carriers in the p-type and n-type thermoelectric materials in the module move, generating an electromotive force and realizing the conversion of thermal energy into electrical energy. During the production process of iron and steel enterprises, a large amount of medium and low-temperature gas is generated. Most of the gas is waste gas, which will pollute the environment. By attaching a thermoelectric power generation device to the outer wall of the medium and low-temperature gas pipeline to absorb heat and generate electrical energy, it can provide electrical energy for electrical equipment (such as combustible gas alarm devices, temperature sensors, pressure sensors, etc.) in enterprise production, which can not only achieve the effect of energy conservation but also reduce costs.

[0030] In this embodiment, a series circuit is formed among multiple thermoelectric power generation modules 103. The positive connection wire of a single thermoelectric power generation module 103 is connected to the negative connection wire of another thermoelectric power generation module 103, and the positive connection wire of the first thermoelectric power generation module 103 and the negative connection wire of the last thermoelectric power generation module 103 are connected to the voltage regulator box 2 of the energy storage system.

[0031] Furthermore, a thermal conductive silicone grease layer is coated between the hot end of the thermoelectric power generation module 103 and the outer wall of the medium and low-temperature heat source pipeline 102. A thermal conductive silicone grease layer is coated between the cold end of the thermoelectric power generation module 103 and the base 105 of the heat pipe 106 radiator. The thermal conductive silicone grease has a high thermal conductivity coefficient, thus ensuring good heat transfer at the hot end and the cold end.

[0032] Furthermore, the thermoelectric power generation device based on the utilization of medium and low-temperature waste heat in iron and steel enterprises further includes heat dissipation fins 107 sleeved outside the condensation ends of all heat pipes 106 to accelerate the heat dissipation and liquefaction of the gaseous saturated liquid. The heat dissipation fins 107 are in contact with the condensation ends of the heat pipes 106.

[0033] In this embodiment, multiple heat dissipation fins 107 are provided to improve the heat dissipation effect of the heat pipe 106. The aluminum alloy module fixing plate 104 is welded to the medium and low-temperature heat source pipeline 102 to ensure the stable structure of the thermoelectric power generation device.

[0034] Specifically, the thermoelectric power generation module 103 is composed of multiple p-type thermoelectric materials 201, multiple n-type thermoelectric materials 202, copper sheets 203, and heat-conducting ceramic sheets 204. The p-type thermoelectric materials 201 and the n-type thermoelectric materials 202 are connected by the copper sheets 203. When there is a temperature difference between the hot end and the cold end of the thermoelectric power generation module 103, the carriers in the p-type thermoelectric materials 201 and the n-type thermoelectric materials 202 move, generating an electromotive force and realizing the conversion of thermal energy into electrical energy.

[0035] In this embodiment, multiple slots are opened on the aluminum alloy template fixing plate to correspond to multiple thermoelectric power generation modules 103, and the thermoelectric power generation modules 103 are supported above the slots through their extended wires.

[0036] The working principle of the thermoelectric power generation device based on the utilization of medium and low temperature waste heat in iron and steel enterprises is as follows: The ion movement inside the thermoelectric material is caused by the temperature difference between the medium and low temperature heat source and the ambient air, generating electromotive force for power generation. When the medium and low temperature heat source flows through the pipe section equipped with the thermoelectric power generation device 1, the heat is transferred from the inner wall fins 101 of the pipeline to the hot end of the thermoelectric power generation module 103 attached to the outer wall of the pipeline. The heat pipe 106 heat exchanger at the cold end of the thermoelectric power generation module 103 absorbs heat through the evaporation of the saturated liquid in the evaporation section of the heat pipe 106. The condensation section of the heat pipe 106 is equipped with multiple layers of heat dissipation fins 107 to accelerate the heat dissipation and liquefaction of the gaseous saturated liquid.

[0037] The thermoelectric power generation device based on the utilization of medium and low temperature waste heat in iron and steel enterprises proposed in this embodiment has the following beneficial effects:

[0038] (1) Adopt the heat dissipation method of the heat pipe 106. Compared with air-cooled heat dissipation, the convective heat transfer coefficient of the saturated liquid inside the heat pipe 106 is high, so the heat dissipation efficiency is higher. Compared with water-cooled heat dissipation, the heat pipe 106 heat dissipation does not require adding a water tank, water pipes and water pumps to realize the cooling water circulation, reducing the space occupation and cost;

[0039] (2) The condensation section of the heat pipe 106 is equipped with multiple layers of heat dissipation fins 107, which can increase the heat dissipation area, so the heat dissipation effect at the cold end of the thermoelectric power generation module 103 is better;

[0040] (3) The thermoelectric power generation device adopted in this thermoelectric power generation device, which is composed of a thermoelectric power generation module 103, a heat pipe 106 radiator, etc., has the characteristics of simple structure, good processing performance, strong plasticity, low operating cost, convenient maintenance, long service life, etc.

[0041] The present utility model also proposes a thermoelectric power generation system based on the utilization of medium and low temperature waste heat in iron and steel enterprises.

[0042] Refer to Figure 1 , in this preferred embodiment, a thermoelectric power generation system based on the utilization of medium and low temperature waste heat in iron and steel enterprises is characterized in that it includes a thermoelectric power generation device based on the utilization of medium and low temperature waste heat in iron and steel enterprises, and also includes a medium and low temperature heat source pipeline 102 and an energy storage device electrically connected to the thermoelectric power generation device. The energy storage device includes a voltage stabilizer box 2 and a lithium battery 3 electrically connected thereto. The lithium battery 3 is connected to a voltage regulator 4. Multiple sets of thermoelectric power generation devices are installed on the surface of the medium and low temperature heat source pipeline 102. For the specific structure and beneficial effects of the thermoelectric power generation device based on the utilization of medium and low temperature waste heat in iron and steel enterprises, refer to the above embodiments and will not be elaborated here. The voltage regulator 4 is connected to electrical equipment 5 (such as a combustible gas alarm, a temperature measuring sensor, a pressure measuring sensor, etc.) and provides electrical energy.

[0043] Specifically, in this embodiment, all the thermoelectric power generation modules 103 in a single set of thermoelectric power generation devices are grouped together, and the positive and negative electrodes of 5 thermoelectric power generation modules 103 are connected in series in sequence. The size of a single thermoelectric power generation module 103 is 56mm×56mm. Each group of thermoelectric power generation devices between the thermoelectric power generation systems is connected in parallel.

[0044] Furthermore, a plurality of fins 101 are installed on the inner wall of the medium and low temperature heat source pipe 102 to enhance heat transfer, which can effectively improve the efficiency of transferring the heat of the high temperature heat source to the hot end of the thermoelectric power generation module 103.

[0045] In this embodiment, the lithium battery 3 is connected to the voltage regulator 4, which can be adjusted to different voltages for corresponding devices to use, increasing the applicability of the power generation device. The voltage stabilizing box 2 and the lithium battery 3 cooperate to not only stabilize the voltage output by the thermoelectric power generation device, avoiding the impact of voltage fluctuations on user equipment, but also store the excess electric energy, realizing the recovery and utilization of waste heat and improving the economy.

[0046] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A thermoelectric power generation device based on low-temperature waste heat utilization in a steel enterprise, characterized in that: It includes a thermoelectric power generation module, an aluminum alloy template fixing plate, a heat pipe radiator base and a heat pipe, wherein: The thermoelectric power generation modules are provided in plurality, all of which are nested in the aluminum alloy template fixing plate, the positive and negative electrodes of all the thermoelectric power generation modules are connected in series in sequence, the hot end of the thermoelectric power generation module is in contact with and connected to the outer wall of the medium and low temperature heat source pipeline, and the cold end of the thermoelectric power generation module is in contact with and connected to the base of the heat pipe radiator, and the base of the heat pipe radiator supports a plurality of heat pipes, and the evaporation section of the heat pipe is in close contact with the base of the heat pipe radiator.

2. The thermoelectric power generation device based on low temperature waste heat utilization in steel enterprises according to claim 1, characterized in that: A thermal conductive silicone grease layer is coated between the hot end of the thermoelectric power generation module and the outer wall of the medium and low temperature heat source pipeline.

3. The thermoelectric power generation device based on low temperature waste heat utilization in steel enterprises according to claim 1, characterized in that: A thermal conductive silicone grease layer is applied between the cold end of the thermoelectric power generation module and the base of the heat pipe radiator.

4. The thermoelectric power generation device based on low temperature waste heat utilization in steel enterprises according to claim 1, characterized in that: It also includes heat dissipation fins sleeved on the outside of all heat pipe condensation ends to accelerate the heat dissipation and liquefaction of gaseous saturated liquid.

5. The thermoelectric power generation device based on low temperature waste heat utilization in steel enterprises according to claim 4, characterized in that: The heat dissipation fins are provided in plurality.

6. The thermoelectric power generation device based on low temperature waste heat utilization in steel enterprises according to claim 1, characterized in that: The aluminum alloy template fixing plate is connected to the medium and low temperature heat source pipeline by welding.

7. The thermoelectric power generation device based on low temperature waste heat utilization in steel enterprises according to claim 1, characterized in that: The thermoelectric power generation module comprises a plurality of p-type thermoelectric materials, a plurality of n-type thermoelectric material copper sheets and a heat-conducting ceramic sheet, and the p-type thermoelectric materials and the n-type thermoelectric materials are connected via the copper sheets.

8. The thermoelectric power generation device based on low temperature waste heat utilization in steel enterprises according to claim 1, characterized in that: The aluminum alloy template fixing plate is provided with a plurality of slots corresponding to a plurality of thermoelectric power generation modules, and the thermoelectric power generation modules are supported above the slots by their extended wires.

9. A thermoelectric power generation system based on low-temperature waste heat utilization in steel enterprises, characterized in that: It includes a thermoelectric power generation device based on the utilization of low-temperature waste heat in a steel enterprise as described in any one of claims 1 to 8, and also includes a low-temperature heat source pipeline and an energy storage device electrically connected to the thermoelectric power generation device, the energy storage device includes a voltage stabilizer box and a lithium battery electrically connected thereto, the lithium battery is connected to the voltage regulator, and multiple sets of thermoelectric power generation devices are installed on the surface of the low-temperature heat source pipeline.

10. The thermoelectric power generation system based on low temperature waste heat utilization in steel enterprises according to claim 9, characterized in that: The inner wall of the medium and low temperature heat source pipeline is installed with a plurality of fins to increase heat transfer.

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