Flue gas waste heat recovery device and new energy automobile supply chain integrated temperature control system

Abstract

The invention belongs to the technical field of die-casting manufacturing, and discloses a flue gas waste heat recovery device and a new energy automobile supply chain integrated temperature control system. The smoke waste heat recovery device comprises a first heat exchange pipeline, a second heat exchange pipeline and a third heat exchange pipeline which are sequentially arranged from the smoke inlet end to the smoke outlet end of the smoke exhaust pipe. The first heat exchange pipeline can heat a first medium introduced into the first heat exchange pipeline, the second heat exchange pipeline can heat water introduced into the second heat exchange pipeline, and the third heat exchange pipeline can heat a second medium introduced into the third heat exchange pipeline. According to the flue gas waste heat recovery device, waste heat of flue gas is used for heating the first medium, the water and the second medium in sequence so as to meet the requirements of a die-casting workshop; therefore, the flue gas is not required to be cooled by external equipment, energy for heating equipment such as a mold temperature control device, steam generation equipment and a boiler is also saved, the energy consumption is greatly reduced, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of die-casting manufacturing technology, and in particular to a flue gas waste heat recovery device and an integrated temperature control system for a new energy vehicle supply chain. Background Art

[0002] With the development of the new energy vehicle industry, more and more structural parts of new energy vehicles are produced by die-casting. Existing die-casting workshops need to be equipped with furnaces, die-casting molds, mold temperature control devices, steam generating equipment and boilers, etc. Among them, the furnace is used to melt the raw materials for casting, the die-casting mold is used to produce die-casting products, and the mold temperature control device is used to heat the medium to heat and keep the die-casting mold warm. The heating medium is generally heat transfer oil, which interacts thermally with the die-casting mold through the heat transfer oil; the boiler is used to heat the die-casting products after washing, and the steam generating equipment is used to generate steam to passivate the washed products, so that a protective film is formed on the surface of the product to reduce corrosion.

[0003] In actual production operations, the temperature of furnace flue gas is as high as over 300°C, while the temperature resistance of the bag filter used for flue gas post-treatment is much lower than the temperature of the flue gas, and the temperature difference reaches over 100°C. Therefore, additional cooling equipment is needed to cool the flue gas. In addition, the mold temperature control device is limited by the requirements of the ring plate and can only heat the medium to about 250°C through electric energy, which consumes a lot of electric energy. The power of some large mold temperature control devices can reach over 100KW. In addition, steam generating equipment and boilers also need to use electric energy to heat water. This ultimately leads to huge power consumption in the factory area and high production costs.

[0004] Therefore, the above problems need to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to provide a flue gas waste heat recovery device and an integrated temperature control system for the new energy vehicle supply chain, so as to provide heat to the mold temperature control device, steam generating equipment and boiler through the high-temperature flue gas of the furnace, so as to reduce the power consumption of the factory and thus reduce production costs.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A flue gas waste heat recovery device, the flue gas waste heat recovery device is used to recover the waste heat of flue gas in a flue gas exhaust pipe of a furnace, the flue gas waste heat recovery device comprises a first heat exchange pipeline, a second heat exchange pipeline and a third heat exchange pipeline which are sequentially arranged from a smoke inlet end to a smoke outlet end of the smoke exhaust pipe;

[0008] The first heat exchange pipeline is placed inside the smoke exhaust pipe, the inlet end and the outlet end of the first heat exchange pipeline both extend out of the smoke exhaust pipe, and the first heat exchange pipeline can heat the first medium passing into the first heat exchange pipeline to a temperature higher than the working temperature of the die-casting mold;

[0009] The second heat exchange pipeline is placed inside the smoke exhaust pipe, the inlet end and the outlet end of the second heat exchange pipeline both extend out of the smoke exhaust pipe, and the second heat exchange pipeline can heat water passing into the second heat exchange pipeline to above the boiling point to form steam;

[0010] The third heat exchange pipeline is placed inside the smoke exhaust pipe, the inlet and outlet ends of the third heat exchange pipeline both extend out of the smoke exhaust pipe, and the third heat exchange pipeline can heat the second medium passing into the third heat exchange pipeline.

[0011] Preferably, the inlet end of the first heat exchange pipeline is located on a side of the outlet end of the first heat exchange pipeline away from the smoke inlet end of the smoke exhaust pipe.

[0012] Preferably, the second heat exchange pipeline comprises:

[0013] An evaporation pipe and a steam pipe, wherein the evaporation pipe runs through the smoke exhaust pipe, the inlet end of the evaporation pipe is connected to a water source, and the outlet end of the evaporation pipe is connected to the steam pipe.

[0014] Preferably, a plurality of evaporation tubes are provided, and outlet ends of all the evaporation tubes are connected to the steam pipe.

[0015] The integrated temperature control system for the new energy vehicle supply chain includes a flue gas waste heat recovery device and further includes:

[0016] a liquid storage container, wherein the first medium is stored in the liquid storage container, the liquid storage container is connected to the inlet and outlet of the first heat exchange pipeline through a heating pipeline, the first medium can circulate in the first heat exchange pipeline, and the liquid storage container can supply the first medium to the die-casting mold; and

[0017] A heat exchanger, wherein the heat exchanger has a first inlet and a first outlet, the liquid storage container is connected to the first inlet and the first outlet through a heat dissipation pipeline, the first medium can circulate inside the heat exchanger, and the heat exchanger can cool the first medium.

[0018] Preferably, the new energy vehicle supply chain integrated temperature control system further includes:

[0019] A liquid supply container, wherein the first medium is stored in the liquid supply container, and the liquid supply container can replenish the first medium to the liquid storage container.

[0020] Preferably, the new energy vehicle supply chain integrated temperature control system further includes:

[0021] A water storage container, wherein water is stored inside the water storage container, the heat exchanger also has a second inlet and a second outlet, the water storage container is connected to the second inlet and the second outlet through a hot water pipe, water can circulate inside the heat exchanger, and the water storage container can output hot water.

[0022] Preferably, the new energy vehicle supply chain integrated temperature control system further includes:

[0023] A steam drum, wherein the steam drum is connected to the inlet end of the second heat exchange pipeline through a water supply pipeline, and the steam drum is connected to the outlet end of the second heat exchange pipeline through a steam pipeline, and the steam drum can output steam.

[0024] Preferably, a water supply pipeline is connected between the water storage container and the steam drum, so that water inside the water storage container can flow to the steam drum.

[0025] Preferably, the middle section of the water replenishment pipeline is connected to the third heat exchange pipeline.

[0026] Beneficial effects of the present invention:

[0027] The flue gas waste heat recovery device of the present invention performs three-stage heating on the first medium, water and the second medium through the first heat exchange pipeline, the second heat exchange pipeline and the third heat exchange pipeline respectively;

[0028] First, the first medium is heated by the flue gas with the highest temperature, so that the first medium can be higher than the working temperature of the die-casting mold to meet the working temperature requirements of the die-casting mold. The flue gas can be quickly cooled at this stage; secondly, the water is heated by the flue gas after the initial cooling to form steam, so that the die-casting product can be passivated by steam. The flue gas is further cooled at this stage; then, the second medium is heated by the flue gas after the secondary cooling to meet the cleaning requirements of the die-casting product, the water supply requirements of the second heat exchange pipeline or the additional heating requirements. The flue gas at this stage can be cooled to a temperature below the temperature that the bag filter can withstand;

[0029] Ultimately, by making tertiary use of the flue gas waste heat from the furnace, not only is there no need to rely on external equipment to cool the flue gas, but it also saves the energy used for heating by mold temperature control devices, steam generating equipment, boilers and other equipment, greatly saving energy consumption and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a layout diagram of the flue gas waste heat recovery device of the present invention;

[0031] Figure 2 It is a layout diagram of the integrated temperature control system for the new energy vehicle supply chain of the present invention.

[0032] In the figure:

[0033] 100. exhaust pipe; 101. temperature sensor;

[0034] 1. The first heat exchange pipeline;

[0035] 2. Second heat exchange pipeline; 21. Evaporation pipe; 22. Steam pipe;

[0036] 3. The third heat exchange pipeline;

[0037] 4. Hot oil tank; 41. Heating pipeline; 42. Heat dissipation pipeline;

[0038] 5. heat exchanger; 51. first inlet; 52. first outlet; 53. second inlet; 54. second outlet;

[0039] 6. Oil storage tank; 61. Oil supply pipeline; 62. Expansion tank; 621. Liquid level sensor;

[0040] 7. Hot water tank; 71. Hot water pipe; 72. Water supply pipe; 73. Water softener;

[0041] 8. Steam drum; 81. Water supply pipeline; 82. Steam pipeline; 83. Steam sub-drum; 84. Liquid level electrode rod. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0043] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0046] Refer to the following Figure 1 to Figure 2 The flue gas waste heat recovery device and the new energy vehicle supply chain integrated temperature control system provided by the present invention are described.

[0047] The flue gas waste heat recovery device comprises a first heat exchange pipeline 1, a second heat exchange pipeline 2 and a third heat exchange pipeline 3, and the first heat exchange pipeline 1, the second heat exchange pipeline 2 and the third heat exchange pipeline 3 are sequentially arranged from the smoke inlet end to the smoke outlet end of the smoke exhaust pipe 100 of the furnace. In this embodiment, the smoke exhaust pipe 100 is vertically arranged, and the smoke inlet end of the smoke exhaust pipe 100 is located at the bottom of the smoke outlet end for description, that is, the first heat exchange pipeline 1, the second heat exchange pipeline 2 and the third heat exchange pipeline 3 are sequentially arranged from bottom to top, so as to perform three-level utilization of the flue gas waste heat of the furnace.

[0048] First, the first heat exchange pipeline 1 is placed inside the exhaust pipe 100, and the inlet and outlet ends of the first heat exchange pipeline 1 both extend out of the exhaust pipe 100. The first heat exchange pipeline 1 can heat the first medium passing into the first heat exchange pipeline 1 to a temperature higher than the working temperature of the die-casting mold. Specifically in this embodiment, the first heat exchange pipeline 1 in this embodiment is arranged in a coil, which can extend the heating path of the first medium and improve the heating effect on the first medium. The first medium in this embodiment is the heat transfer oil used in the die-casting mold, and in some other embodiments, the first medium can also be other liquid media.

[0049] The heat transfer oil is introduced into the first heat exchange pipeline 1 through an external pipeline, so that the heat transfer oil can be heated by the flue gas with the highest temperature. The temperature of the flue gas here is as high as 350°C, so the heat transfer oil can be heated to above 250°C to meet the heating needs of the die-casting mold. At the same time, the flue gas can also be quickly cooled to about 300°C at this stage.

[0050] Furthermore, the inlet and outlet of the first heat exchange pipeline 1 are distributed in the vertical direction, and the inlet of the first heat exchange pipeline 1 is located above the outlet of the first heat exchange pipeline 1, so that the heat transfer oil and the flue gas move in the opposite direction, that is, the heat transfer oil flows downward and the flue gas moves upward, so that the temperature difference between the heat source and the cold source always exists in the entire heat exchange process and changes continuously with the movement of the fluid. The continuous temperature difference provides a strong driving force for heat transfer, thereby improving the heat exchange efficiency. In addition, the temperature intersection of the heat source and the cold source is located in the middle of the fluid, which makes the temperature distribution of the exhaust pipe 100 relatively uniform.

[0051] Secondly, the second heat exchange pipeline 2 is placed inside the smoke exhaust pipe 100, and the inlet and outlet ends of the second heat exchange pipeline 2 both extend out of the smoke exhaust pipe 100. The second heat exchange pipeline 2 can heat the water entering the second heat exchange pipeline 2 to above the boiling point to form steam. The water is heated by the flue gas after the initial cooling to form steam. It should be noted that the water here has been pre-heated to above 60°C, and then the hot water is heated to boiling by the flue gas at nearly 300°C, so as to generate steam to passivate the die-casting products. At this stage, the flue gas is further cooled to about 200°C.

[0052] Specifically, the second heat exchange pipeline 2 includes an evaporation tube 21 and a steam tube 22, wherein the evaporation tube 21 penetrates the smoke exhaust pipe 100, and multiple evaporation tubes 21 are arranged in parallel. In this embodiment, four evaporation tubes are taken as an example. The steam tube 22 is arranged outside the smoke exhaust pipe 100, and the inlet end of each evaporation tube 21 is connected to the water source, and the outlet end of each evaporation tube 21 is connected to the steam tube 22. By heating hot water to multiple evaporation tubes 21 at the same time, steam is generated. In addition, the inlet end of each evaporation tube 21 is arranged higher than the outlet end, so that the hot water and the smoke move in the opposite direction, which can improve the heat exchange efficiency.

[0053] In addition, the third heat exchange pipeline 3 is placed inside the smoke exhaust pipe 100, and the inlet and outlet ends of the third heat exchange pipeline 3 both extend out of the smoke exhaust pipe 100. The third heat exchange pipeline 3 can heat the second medium passed into the third heat exchange pipeline 3, and the second medium can clean the die-cast products. In this embodiment, the second medium is water, and in some other embodiments, the second medium can also be other liquid media, such as a cleaning agent for cleaning die-cast products. The structure of the third heat exchange pipeline 3 in this embodiment is similar to that of the first heat exchange pipeline 1, except that the length of the third heat exchange pipeline 3 is shorter than that of the first heat exchange pipeline 1 to prevent the temperature of the water from reaching the boiling point.

[0054] Based on the above, the second medium is finally heated by the flue gas after secondary cooling. Here, the temperature of the flue gas has dropped to about 200°C, and the water can be heated to above 60°C, so that the die-casting products can be cleaned. The hot water can also be passed through the pipeline into the second heat exchange pipeline 2 for reheating. The flue gas is cooled to about 170°C at this time, which is below the temperature that the bag filter can withstand, thereby making full use of the waste heat of the flue gas. Not only does it not need to rely on external equipment to cool the flue gas, but it also saves a series of heating equipment, greatly saving energy consumption and reducing production costs.

[0055] In addition, multiple temperature sensors 101 are arranged from bottom to top inside the smoke exhaust pipe 100. In this embodiment, four temperature sensors 101 are used as an example. The four temperature sensors 101 are arranged at the smoke inlet end of the smoke exhaust pipe 100, between the first heat exchange pipeline 1 and the second heat exchange pipeline 2, between the second heat exchange pipeline 2 and the third heat exchange pipeline 3, and the smoke outlet end of the smoke exhaust pipe 100. The temperature sensor 101 is electrically connected to the control system of the plant. The staff can monitor the local temperature inside the smoke exhaust pipe 100, and timely adjust the liquid inlet amount and / or liquid inlet speed of the first heat exchange pipeline 1, the second heat exchange pipeline 2, and the third heat exchange pipeline 3 according to the obtained temperature, so as to ensure that the smoke temperature at the smoke outlet end of the smoke exhaust pipe 100 is reduced to about 170°C to prevent the smoke temperature from being higher than the temperature that the bag filter can withstand.

[0056] The present embodiment also provides an integrated temperature control system for the new energy vehicle supply chain, which includes a flue gas waste heat recovery device, a liquid storage container, a heat exchanger 5, a water storage container and a steam drum 8, and the liquid storage container, the water storage container and the steam drum 8 are all connected to the flue gas waste heat recovery device.

[0057] Specifically, the first medium is stored inside the liquid storage container, and the liquid storage container is connected to the first heat exchange pipeline 1 through the heating pipeline 41. The first medium can circulate inside the heating pipeline 41, and the liquid storage container can supply the first medium to the die-casting mold. The liquid storage container in this embodiment is a hot oil tank 4, that is, the hot oil tank 4 stores heat transfer oil inside. In some other embodiments, the liquid storage container can also be other containers, such as a liquid storage box or a liquid storage barrel.

[0058] A circulation pump is provided in the middle of the heating pipe 41 in this embodiment, so that the first medium can circulate inside the heating pipe 41. It should be noted that the circulation of the medium in all the following pipes is driven by the circulation pump, and all the circulation pumps are arranged in parallel with two, which can be used in one standby mode during the operation, and can ensure the reliability of the integrated temperature control system of the new energy vehicle supply chain. It will not be described in detail later. Safety valves are provided in all the following pipes to prevent the pipes from bursting due to excessive pressure.

[0059] In addition, a temperature sensor 101 is also provided in the middle of the heating pipe 41 in this embodiment. In this embodiment, two temperature sensors 101 are used as an example. The two temperature sensors 101 are respectively arranged at the liquid inlet and liquid outlet of the first heat exchange pipeline 1. The circulating pump and the temperature sensor 101 are both electrically connected to the control system of the plant. The control system can obtain the temperature of the liquid inlet and liquid outlet of the heat transfer oil flowing through the first heat exchange pipeline 1 through the temperature sensor 101. The control system adjusts the speed of the circulating pump according to the temperature of the heat transfer oil, thereby adjusting the liquid inlet amount of the first heat exchange pipeline 1, so that the temperature of the heat transfer oil inside the hot oil tank 4 is within a certain range.

[0060] Exemplarily, the heat exchanger 5 in this embodiment is a dual-medium heat exchanger, that is, the heat exchanger 5 has two inlets and two outlets, and the liquid storage container is connected to the first inlet 51 and the first outlet 52 of the heat exchanger 5 through the heat dissipation pipe 42. The first medium can circulate inside the heat exchanger 5, and the second inlet 53 and the second outlet 54 of the heat exchanger 5 are connected to another medium through a pipe, and the temperature of the medium is lower than the temperature of the heat transfer oil, so that the heat transfer oil can be cooled by the heat exchanger 5.

[0061] Furthermore, the water storage container in this embodiment is a hot water tank 7, which is connected to a water source through a pipeline, so as to supply water to the inside of the hot water tank 7, and the hot water tank 7 is connected to the second inlet 53 and the second outlet 54 of the heat exchanger 5 through a hot water pipe 71, and water can circulate inside the heat exchanger 5, so that the water and the first medium can exchange heat, thereby heating the water, so that the hot water tank 7 can output hot water to clean the die-cast products, and at the same time, the heat transfer oil can be cooled. In some other embodiments, other media can also be separately introduced into the second inlet 53 of the heat exchanger 5.

[0062] It is worth mentioning that a water softener 73 is arranged in the middle of the water supply pipeline of the hot water tank 7, so that the calcium and magnesium ions in the water are removed by the water softener 73, the water hardness is reduced, and soft water is obtained. The die-cast workpiece is cleaned by heated soft water, which can better dissolve grease and stains, making the cleaning process more efficient, the surface of the workpiece after cleaning is cleaner, and the residue of the cleaning agent is reduced; since soft water contains no or less minerals, scale will not form on the surface of the workpiece, thereby protecting the surface of the workpiece from damage and maintaining its original gloss and precision.

[0063] Based on the above, when the integrated temperature control system of the new energy vehicle supply chain just works, the speed of the circulating pump is adjusted to the maximum, and the heat transfer oil is quickly pumped to the first heat exchange pipeline 1 for heating, so that the heat transfer oil inside the hot oil tank 4 is quickly heated up until it is higher than the working temperature of the die-casting mold. In this embodiment, 250°C is taken as an example, so that the heat transfer oil is supplied to the die-casting mold through the pipeline, so that the die-casting mold is quickly heated up. When the temperature of the hot oil tank 4 is stabilized at about 250°C, the heat transfer oil is slowly heated up by reducing the speed of the circulating pump. In addition, the hot oil tank 4 is connected to the heat exchanger 5 by the heat dissipation pipeline 42, and the heat of the heat transfer oil is exchanged with the water inside the hot water tank 7, thereby heating the water, and when the temperature of the heat transfer oil is too high, the circulating pump can be turned off for a short time and the flow of the heat transfer oil to the heat exchanger 5 can be increased to achieve the effect of cooling the heat transfer oil, thereby not only making full use of the heat of the flue gas waste heat, but also accurately controlling the temperature of the heat transfer oil.

[0064] Preferably, the new energy vehicle supply chain integrated temperature control system further includes a liquid supply container, which can replenish the first medium to the liquid storage container. The liquid supply container in this embodiment is an oil storage tank 6. In some other embodiments, the liquid supply container can also be other containers, such as a liquid supply box or a liquid supply barrel. The oil storage tank 6 is connected to the oil supply pipeline 61, and the oil storage tank 6 is connected to the hot oil tank 4 through an oil pipe. Thus, the heat transfer oil is received and stored by the oil storage tank 6, and the heat transfer oil is transported to the hot oil tank 4 through the oil pipe, and the heat transfer oil is replenished to the inside of the hot oil tank 4 in time.

[0065] In addition, the oil storage tank 6 and the hot oil tank 4 are connected to an expansion tank 62 through an oil pipe, and a liquid level sensor 621 is provided inside the expansion tank 62, and the liquid level sensor 621 is electrically connected to the control system. In the actual operation process, the heat transfer oil will fill the hot oil tank 4, and part of the heat transfer oil will be inside the expansion tank 62, so that the liquid level of the heat transfer oil can be detected by the liquid level sensor 621, and the total amount of the heat transfer oil in the hot oil tank 4 and the expansion tank 62 can be measured, and the heat transfer oil can be replenished in time after the liquid level of the heat transfer oil drops. It should be explained that a liquid level sensor 621 is also provided inside the hot water tank 7 to detect the internal water level of the hot water tank 7 so as to replenish soft water into the hot water tank 7 in time.

[0066] Furthermore, a water supply pipe 72 is connected between the steam drum 8 and the hot water tank 7, and hot water can circulate inside the water supply pipe 72, and the middle section of the water supply pipe 72 is connected to the third heat exchange pipe 3, so that the hot water inside the hot water tank 7 is sent to the steam drum 8 after being heated by the third heat exchange pipe 3, so that the temperature of the hot water is further increased, making it easier to form steam.

[0067] The drum 8 is connected to the inlet end of the second heat exchange pipeline 2 through the water supply pipeline 81, that is, the drum 8 is connected to the evaporation tube 21 through the water supply pipeline 81, and the drum 8 is connected to the outlet end of the second heat exchange pipeline 2 through the steam pipeline 82, that is, the drum 8 is connected to the steam pipe 22 through the steam pipeline 82, so that the hot water is heated through the second heat exchange pipeline 2, the hot water is boiled to form steam, and is input into the drum 8.

[0068] In addition, the steam drum 8 is connected to a sub-steam drum 83, through which steam is directed to different pipes as needed, so that the steam drum 8 outputs steam to perform passivation treatment on the die-cast workpiece. A liquid level electrode rod 84 is also provided inside the steam drum 8, through which the liquid level inside the steam drum 8 can be detected. It should be noted that the specific structures of the steam drum 8 and the sub-steam drum 83 are all prior art and will not be described in detail here.

[0069] By generating steam in the above manner, and utilizing flue gas to reheat hot water so that the hot water boils to form steam, not only the cost of purchasing boilers is saved, but also energy is saved, thus greatly reducing production costs.

[0070] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A flue gas waste heat recovery device, the flue gas waste heat recovery device is used to recover the waste heat of flue gas in a flue gas exhaust pipe (100) of a furnace, characterized in that: The flue gas waste heat recovery device comprises a first heat exchange pipeline (1), a second heat exchange pipeline (2) and a third heat exchange pipeline (3) which are arranged in sequence from the smoke inlet end to the smoke outlet end of the smoke exhaust pipe (100); The first heat exchange pipeline (1) is placed inside the smoke exhaust pipe (100), the inlet end and the outlet end of the first heat exchange pipeline (1) both extend out of the smoke exhaust pipe (100), and the first heat exchange pipeline (1) is capable of heating the first medium passing into the first heat exchange pipeline (1) to a temperature higher than the working temperature of the die-casting mold; The second heat exchange pipeline (2) is placed inside the smoke exhaust pipe (100), the inlet end and the outlet end of the second heat exchange pipeline (2) both extend out of the smoke exhaust pipe (100), and the second heat exchange pipeline (2) is capable of heating water passing into the second heat exchange pipeline (2) to a temperature above the boiling point to form steam; The third heat exchange pipeline (3) is placed inside the smoke exhaust pipe (100), and both the inlet end and the outlet end of the third heat exchange pipeline (3) extend out of the smoke exhaust pipe (100). The third heat exchange pipeline (3) is capable of heating a second medium passing into the third heat exchange pipeline (3).

2. The flue gas waste heat recovery device according to claim 1, characterized in that: The inlet end of the first heat exchange pipeline (1) is located on the side of the outlet end of the first heat exchange pipeline (1) away from the smoke inlet end of the smoke exhaust pipe (100).

3. The flue gas waste heat recovery device according to claim 1, characterized in that: The second heat exchange pipeline (2) comprises: An evaporation pipe (21) and a steam pipe (22), wherein the evaporation pipe (21) passes through the smoke exhaust pipe (100), the inlet end of the evaporation pipe (21) is connected to a water source, and the outlet end of the evaporation pipe (21) is connected to the steam pipe (22).

4. The flue gas waste heat recovery device according to claim 3, characterized in that: A plurality of evaporation tubes (21) are provided, and outlet ends of all the evaporation tubes (21) are connected to the steam tube (22).

5. New energy vehicle supply chain integrated temperature control system, characterized by: The new energy vehicle supply chain integrated temperature control system comprises the flue gas waste heat recovery device according to any one of claims 1 to 4, and further comprises: a liquid storage container, wherein the first medium is stored in the liquid storage container, the liquid storage container is connected to the inlet and outlet of the first heat exchange pipeline (1) through a heating pipe (41), the first medium can circulate in the first heat exchange pipeline (1), and the liquid storage container can supply the first medium to the die-casting mold; and A heat exchanger (5), wherein the heat exchanger (5) has a first inlet (51) and a first outlet (52), the liquid storage container is connected to the first inlet (51) and the first outlet (52) via a heat dissipation pipe (42), the first medium can circulate inside the heat exchanger (5), and the heat exchanger (5) can cool the first medium.

6. The new energy vehicle supply chain integrated temperature control system according to claim 5 is characterized in that: The new energy vehicle supply chain integrated temperature control system also includes: A liquid supply container, wherein the first medium is stored in the liquid supply container, and the liquid supply container can replenish the first medium to the liquid storage container.

7. The new energy vehicle supply chain integrated temperature control system according to claim 5 is characterized in that: The new energy vehicle supply chain integrated temperature control system also includes: A water storage container, wherein water is stored in the water storage container, and the heat exchanger (5) also has a second inlet (53) and a second outlet (54). The water storage container is connected to the second inlet (53) and the second outlet (54) through a hot water pipe (71), so that water can circulate in the heat exchanger (5), and the water storage container can output hot water.

8. The new energy vehicle supply chain integrated temperature control system according to claim 7 is characterized in that: The new energy vehicle supply chain integrated temperature control system also includes: A steam drum (8), wherein the steam drum (8) is connected to the inlet end of the second heat exchange pipeline (2) through a water supply pipeline (81), and the steam drum (8) is connected to the outlet end of the second heat exchange pipeline (2) through a steam pipeline (82), and the steam drum (8) is capable of outputting steam.

9. The new energy vehicle supply chain integrated temperature control system according to claim 8, characterized in that: A water supply pipeline (72) is connected between the water storage container and the steam drum (8), so that water inside the water storage container can flow into the steam drum (8).

10. The new energy vehicle supply chain integrated temperature control system according to claim 9, characterized in that: The middle section of the water replenishment pipeline (72) is connected to the third heat exchange pipeline (3).

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