Efficient energy-saving vertical annealing furnace

Abstract

The utility model relates to the field of metal material heat treatment equipment, and provides a high-efficiency energy-saving vertical annealing furnace which comprises a hearth and a thermal insulation part, the thermal insulation part is arranged in the hearth and surrounds the central axis of the hearth, and an area formed by surrounding of the thermal insulation part is used for containing workpieces. The vertical annealing furnace has the effect of reducing the energy consumption of the vertical annealing furnace under the condition of too fast cooling.

Description

Technical Field

[0001] This application relates to the field of heat treatment equipment for metallic materials, and in particular to a high-efficiency and energy-saving vertical annealing furnace. Background Technology

[0002] A vertical annealing furnace is a metal heat treatment process equipment. Its main working principle is to use a fan to circulate the air to make the temperature distribution in the furnace uniform. Then, the metal workpiece is placed in the annealing furnace and slowly heated to a certain temperature. After holding at that temperature for a period of time, it is cooled at an appropriate rate to reduce the hardness of the metal material, improve its plasticity and toughness, homogenize its chemical composition, remove residual stress, or obtain the expected physical properties.

[0003] In practical use, rapid cooling can sometimes occur, such as when the ambient temperature is too low or the workpiece requires a long cooling time. In such cases, energy needs to be consumed to maintain the furnace temperature or to extend the cooling time. Furthermore, a prolonged cooling time means that energy is continuously consumed over a longer period, thus increasing the total energy consumption. Therefore, a high-efficiency, energy-saving vertical annealing furnace is needed to reduce energy consumption in situations of rapid cooling. Utility Model Content

[0004] In order to reduce the energy consumption of vertical annealing furnaces under conditions of excessively rapid cooling, this application provides a high-efficiency and energy-saving vertical annealing furnace.

[0005] The high-efficiency and energy-saving vertical annealing furnace provided in this application adopts the following technical solution:

[0006] A high-efficiency and energy-saving vertical annealing furnace includes a furnace chamber and a heat insulation component. The heat insulation component is disposed inside the furnace chamber and is arranged around the central axis of the furnace chamber. The area formed by the heat insulation component is used to place workpieces.

[0007] By adopting the above technical solution, by setting up heat insulation components inside the furnace, a certain degree of isolation is formed between the temperature inside and outside the furnace, the heat loss inside the furnace is slowed down, thereby slowing down the cooling rate of the workpiece, and thus reducing the energy consumption caused by the excessively fast cooling rate of the workpiece, achieving the goal of reducing the energy consumption of the vertical annealing furnace under the condition of excessively fast cooling.

[0008] Optionally, the insulation element has a closed vacuum chamber that is arranged around the central axis of the furnace.

[0009] By adopting the above technical solution, the vacuum cavity has a low thermal conductivity and uses the vacuum cavity for insulation, without other energy consumption, which is more environmentally friendly.

[0010] Optionally, it also includes a heat insulation component located in the area formed by the heat insulation component surrounding it; the heat insulation component is arranged around the central axis of the furnace, and the workpiece is located in the area formed by the heat insulation component surrounding it.

[0011] By adopting the above technical solution, by adding insulation components to the area formed by the surrounding insulation components and using the insulation components to enclose the area where the workpiece is placed, the temperature inside the furnace is maintained on the one hand, and the temperature distribution uniformity inside the furnace is improved on the other hand.

[0012] Optionally, the insulation component has an insulation cavity inside, which is used to contain the insulation medium; the insulation component is provided with a first connecting pipe, the lumen of the first connecting pipe is connected to the insulation cavity; the first connecting pipe is provided with a first delivery pump, which is used to deliver the insulation medium to the insulation cavity.

[0013] By adopting the above technical solution, a thermal insulation medium of a certain temperature is delivered into the insulation cavity through the first connecting pipe and the first delivery pump, according to the required temperature. On the one hand, a thermal insulation medium of a specific temperature can be delivered according to the insulation requirements; on the other hand, if it is not necessary to slow down the cooling rate, the thermal insulation medium can be omitted from the insulation cavity, thus improving the flexibility of the insulation component.

[0014] Optionally, the insulation cavity is provided with multiple partitions, which are arranged around the central axis of the furnace and are arranged at radial intervals along the furnace. The upper ends of the multiple partitions are spaced apart from the upper wall of the insulation cavity to allow the insulation medium to pass through.

[0015] By adopting the above technical solution, when the insulation medium is delivered into the insulation cavity, it first enters between the cavity wall and the outermost partition and gradually rises. Upon reaching the height of the partition, the insulation medium enters between adjacent partitions near the central axis of the furnace. This design utilizes multiple partitions to divide the insulation cavity into multiple layers of sequentially adjacent receiving spaces. When injecting the insulation medium, the appropriate thickness of the insulation medium can be injected according to the insulation requirements, improving the flexibility of the insulation components.

[0016] Optionally, the insulation medium is water.

[0017] By adopting the above technical solution, water has a large specific heat capacity, which can reduce the frequency of replacing the insulation medium.

[0018] Optionally, the system further includes an energy storage component disposed on the outer wall of the furnace chamber, the energy storage component being arranged around the central axis of the furnace chamber; the energy storage component is provided with a water storage cavity and a second connecting pipe; one end of the second connecting pipe is connected to the water storage cavity, and the other end is connected from the upper cavity wall of the insulation cavity to the insulation cavity; the second connecting pipe is provided with a second delivery pump, the second delivery pump being used to transport the insulation medium in the insulation cavity to the water storage cavity; the energy storage component is provided with a third connecting pipe, one end of the third connecting pipe being connected to the water storage cavity, and the other end being connected to a medium tank, the medium tank being used to store the insulation medium; the medium tank is provided with a heating device; the end of the first connecting pipe away from the insulation component is connected to the medium tank; the third connecting pipe is provided with a third delivery pump, the third delivery pump being used to transport the insulation medium in the water storage cavity to the medium tank.

[0019] By adopting the above technical solution, an energy storage device is added outside the furnace to store some of the heat lost from the furnace, reducing energy loss. After the temperature of the insulation medium in the insulation cavity drops to a certain level, it is transported to the water storage cavity through the second connecting pipe and the second delivery pump, where it continues to store energy. After absorbing a certain amount of heat, the insulation medium in the water storage cavity is transported to the medium tank for storage through the third connecting pipe and the third delivery pump. This reduces the energy consumption during subsequent heating of the insulation medium, further reducing energy consumption during the cooling process.

[0020] Optionally, the system further includes an energy storage component disposed on the outer wall of the furnace chamber, the energy storage component being arranged around the central axis of the furnace chamber; the energy storage component is provided with a water storage cavity and a second connecting pipe; one end of the second connecting pipe is connected to the water storage cavity, and the other end is connected from the upper cavity wall of the insulation cavity to the insulation cavity; the second connecting pipe is provided with a second delivery pump, the second delivery pump being used to transport the insulation medium in the insulation cavity to the water storage cavity; the energy storage component is provided with a third connecting pipe, one end of the third connecting pipe being connected to the water storage cavity, and the other end being connected to a medium tank, the medium tank... The medium is used to store the insulation medium. The medium tank is equipped with a heating device. The end of the first connecting pipe away from the insulation component is connected to the medium tank. The third connecting pipe is equipped with a third delivery pump, which is used to deliver the insulation medium in the water storage chamber to the medium tank. The bottom of each of the multiple partitions is equipped with a one-way valve, which is used to prevent the insulation medium in the insulation chamber from flowing towards the center of the furnace. The end of the second connecting pipe away from the energy storage component extends to the bottom of the insulation chamber and is located between the inner wall of the insulation chamber near the furnace and the outermost partition.

[0021] By adopting the above technical solution, an energy storage device is added outside the furnace to store some of the heat lost from the furnace, reducing energy loss. After the temperature of the insulation medium in the insulation cavity drops to a certain level, it is transported to the water storage cavity through the second connecting pipe and the second delivery pump, where it continues to store energy. After absorbing a certain amount of heat, the insulation medium in the water storage cavity is transported to the medium tank for storage through the third connecting pipe and the third delivery pump. This reduces the energy consumption during subsequent heating of the insulation medium, further reducing energy consumption during the cooling process.

[0022] During the process of transporting the insulation medium from the insulation cavity to the water storage cavity, due to the principle of communicating vessels, the insulation medium flows through the one-way valves corresponding to each partition to the end of the second communicating pipe, thereby allowing all the insulation medium in the insulation cavity to be transported to the water storage cavity.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By installing heat insulation components in the furnace, the rate of heat exchange between the inside and outside of the furnace is slowed down, reducing energy consumption when cooling is too fast;

[0025] 2. By installing insulation components in the furnace, the workpiece is kept warm on the one hand, and the temperature distribution within the furnace is made more uniform on the other.

[0026] 3. By installing energy storage devices outside the furnace, a portion of the heat lost from the furnace can be stored and recycled, further reducing energy consumption. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application.

[0028] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Furnace chamber; 2. Insulation component; 21. Vacuum chamber; 3. Insulation component; 31. Insulation chamber; 32. First connecting pipe; 33. First transfer pump; 34. Baffle plate; 35. One-way valve; 4. Energy storage component; 41. Water storage chamber; 42. Second connecting pipe; 43. Second transfer pump; 44. Third connecting pipe; 45. Third transfer pump; 5. Medium tank; 51. Heating device. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0031] This application discloses a high-efficiency and energy-saving vertical annealing furnace.

[0032] Example 1

[0033] Reference Figure 1 A high-efficiency and energy-saving vertical annealing furnace includes a furnace chamber 1, a heat insulation component 2, a heat preservation component 3, and an energy storage component 4.

[0034] The heat insulation element 2 is cylindrical and is disposed inside the furnace chamber 1 and connected to the inner wall of the furnace chamber 1. The heat insulation element 2 is arranged around the central axis of the furnace chamber 1, that is, the central axis of the heat insulation element 2 is collinear with the central axis of the furnace chamber 1, and the workpiece is located in the area enclosed by the heat insulation element 2.

[0035] In this embodiment, a vacuum chamber 21 is provided inside the heat insulation component 2. The vacuum chamber 21 is arranged around the central axis of the furnace chamber 1 to form a certain degree of temperature isolation between the inside and outside of the furnace chamber 1, thereby slowing down the heat loss inside the furnace chamber 1 and reducing the energy consumption for maintaining the temperature inside the furnace chamber 1. In other embodiments, the heat insulation component 2 can also be made of other heat insulation materials, such as calcium carbonate, alumina ceramics, etc.

[0036] The insulation component 3 is cylindrical and is disposed within the area enclosed by the insulation component 2 and connected to the inner surface of the insulation component 2. The insulation component 3 is arranged around the central axis of the furnace chamber 1, that is, the central axis of the insulation component 3 is collinear with the central axis of the furnace chamber 1, and the workpiece is located in the area enclosed by the insulation component 3.

[0037] In this embodiment, an insulation cavity 31 is provided inside the insulation component 3, and the insulation cavity 31 is arranged around the central axis of the furnace chamber 1. The insulation cavity 31 is used to contain the insulation medium, which is water in this embodiment. With this design, the insulation component 3 and the insulation medium in the insulation component 3 can both keep the workpiece warm and uniformly distribute the temperature inside the furnace chamber 1.

[0038] The insulation component 3 is provided with a first connecting pipe 32, the cavity of which is connected to the insulation cavity 31. The end of the first connecting pipe 32 away from the insulation component 3 is connected to a medium tank 5 for containing the insulation medium, and the medium tank 5 is provided with a heating device 51. A first delivery pump 33 is installed around the first connecting pipe 32, and the first delivery pump 33 is used to deliver the insulation medium in the medium tank 5 to the insulation cavity 31.

[0039] The energy storage component 4 has a cylindrical structure. The energy storage component 4 is located outside the furnace chamber 1 and connected to the outer wall of the furnace chamber 1. The energy storage component 4 is arranged around the central axis of the furnace chamber 1, that is, the central axis of the energy storage component 4 is collinear with the central axis of the furnace chamber 1.

[0040] The energy storage component 4 has a water storage chamber 41 inside, which is arranged around the central axis of the furnace 1. The energy storage component 4 is provided with a second connecting pipe 42, one end of which is connected to the water storage chamber 41, and the other end is connected to the upper cavity wall of the insulation cavity 31 and extends to the bottom end of the insulation cavity 31. A second delivery pump 43 is installed around the second connecting pipe 42, which is used to deliver the insulation medium in the insulation cavity 31 to the water storage chamber 41.

[0041] The energy storage device 4 is equipped with a third connecting pipe 44, one end of which is connected to the water storage chamber 41 and the other end is connected to the chamber of the medium tank 5. A third delivery pump 45 is installed around the third connecting pipe 44, which is used to deliver the heat preservation medium in the water storage chamber 41 to the medium tank 5.

[0042] The implementation principle of Example 1 is as follows: the heat insulation component 2 with vacuum chamber 21 is used to form a certain isolation between the temperature inside and outside the furnace chamber 1, thereby slowing down the rate of temperature loss inside the furnace chamber 1 and slowing down the cooling rate of the workpiece, thus reducing the energy consumption caused by the excessive cooling rate of the workpiece.

[0043] When it is necessary to further slow down the cooling rate of the workpiece, the heat-insulating medium heated by the heating device 51 is introduced into the heat-insulating cavity 31 through the first connecting pipe 32. On the one hand, it further insulates and heats the workpiece, and on the other hand, it can increase the uniformity of temperature distribution around the workpiece.

[0044] After the temperature of the insulation medium in the insulation cavity 31 drops to a certain level, the insulation medium in the insulation cavity 31 is transported to the water storage cavity 41 by the second transfer pump 43. The insulation medium in the water storage cavity 41 absorbs the heat lost from the furnace 1 to recover heat.

[0045] When it is necessary to transport the insulation medium in the insulation cavity 31 to the water storage cavity 41, the insulation medium in the water storage cavity 41 is first transported to the medium tank 5 through the third delivery pump 45 and the third connecting pipe 44. Then, the insulation medium in the medium tank 5, which has been heated by the heating device 51, is transported to the insulation cavity 31 through the first connecting pipe 32 and the first delivery pump 33.

[0046] Example 2

[0047] Reference Figure 2 The difference between this embodiment and embodiment 1 is that multiple partitions 34 are provided in the heat insulation cavity 31. The multiple partitions 34 are arranged at intervals along the radial direction of the furnace chamber 1. The lower ends of the multiple partitions 34 are all connected to the lower cavity wall of the heat insulation cavity 31, and the upper ends of the multiple partitions 34 are separated from the upper cavity wall of the heat insulation cavity 31 by a gap for the heat insulation medium to pass through.

[0048] Each of the multiple baffles 34 is equipped with a one-way valve 35 at its lower end. The one-way valve 35 is used to impede the flow of the insulation medium tank 5 in the furnace 1 of the insulation cavity 31 in the center direction. The end of the second connecting pipe 42 away from the energy storage component 4 is located between the inner wall of the insulation cavity 31 near the furnace 1 and the outermost baffle 34.

[0049] The implementation principle of Example 2 is as follows: When the insulation medium is introduced into the insulation cavity 31, the insulation medium first enters between the cavity wall of the insulation cavity 31 and the outermost partition 34, and then the liquid level gradually rises, subsequently entering between adjacent partitions 34 in sequence. Insulation medium of different thicknesses can be injected into the insulation cavity 31 according to the insulation requirements, improving the flexibility of the annealing furnace.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-efficiency and energy-saving vertical annealing furnace, characterized in that: It includes a furnace chamber (1) and a heat insulation component (2). The heat insulation component (2) is disposed inside the furnace chamber (1). The heat insulation component (2) is arranged around the central axis of the furnace chamber (1). The area formed by the heat insulation component (2) is used to place the workpiece.

2. The high-efficiency and energy-saving vertical annealing furnace according to claim 1, characterized in that: The insulation component (2) has a closed vacuum chamber (21) which is arranged around the central axis of the furnace (1).

3. A high-efficiency and energy-saving vertical annealing furnace according to claim 1 or 2, characterized in that: It also includes a heat insulation component (3), which is located in the area formed by the heat insulation component (2); the heat insulation component (3) is arranged around the central axis of the furnace (1), and the workpiece is located in the area formed by the heat insulation component (3).

4. The high-efficiency and energy-saving vertical annealing furnace according to claim 3, characterized in that: The insulation component (3) has an insulation cavity (31) inside, which is used to contain the insulation medium; the insulation component (3) is provided with a first connecting pipe (32), the lumen of the first connecting pipe (32) is connected to the insulation cavity (31); the first connecting pipe (32) is provided with a first delivery pump (33), which is used to deliver the insulation medium to the insulation cavity (31).

5. The high-efficiency and energy-saving vertical annealing furnace according to claim 4, characterized in that: The heat insulation cavity (31) is provided with a plurality of partitions (34), which are arranged around the central axis of the furnace (1) and are arranged at intervals along the radial direction of the furnace (1); the upper ends of the plurality of partitions (34) are spaced apart from the upper wall of the heat insulation cavity (31) for the heat insulation medium to pass through.

6. The high-efficiency and energy-saving vertical annealing furnace according to claim 5, characterized in that: The insulation medium is water.

7. The high-efficiency and energy-saving vertical annealing furnace according to claim 4, characterized in that: It also includes an energy storage component (4), which is disposed on the outer wall of the furnace (1) and is arranged around the central axis of the furnace (1); the energy storage component (4) is provided with a water storage cavity (41) and a second connecting pipe (42); one end of the second connecting pipe (42) is connected to the water storage cavity (41), and the other end is connected from the upper cavity wall of the heat insulation cavity (31) to the heat insulation cavity (31); the second connecting pipe (42) is provided with a second delivery pump (43), which is used to transport the heat insulation medium in the heat insulation cavity (31) to the heat insulation chamber. In the water storage chamber (41); the energy storage component (4) is provided with a third connecting pipe (44), one end of the third connecting pipe (44) is connected to the water storage chamber (41), and the other end is connected to a medium tank (5). The medium tank (5) is used to store the heat preservation medium. The medium tank (5) is provided with a heating device (51). The end of the first connecting pipe (32) away from the heat preservation component (3) is connected to the medium tank (5). The third connecting pipe (44) is provided with a third delivery pump (45). The third delivery pump (45) is used to deliver the heat preservation medium in the water storage chamber (41) to the medium tank (5).

8. A high-efficiency and energy-saving vertical annealing furnace according to claim 6, characterized in that: It also includes an energy storage component (4), which is disposed on the outer wall of the furnace (1) and is arranged around the central axis of the furnace (1); the energy storage component (4) is provided with a water storage cavity (41) and a second connecting pipe (42); one end of the second connecting pipe (42) is connected to the water storage cavity (41), and the other end is connected from the upper cavity wall of the heat insulation cavity (31) to the heat insulation cavity (31); the second connecting pipe (42) is provided with a second conveying pump (43), which is used to transport the heat insulation medium in the heat insulation cavity (31) to the water storage cavity (41); the energy storage component (4) is provided with a third connecting pipe (44), one end of the third connecting pipe (44) is connected to the water storage cavity (41), and the other end is connected to a medium tank (5), which is connected to the medium tank (5). 5) is used to store the heat preservation medium. The medium tank (5) is equipped with a heating device (51). The end of the first connecting pipe (32) away from the heat preservation component (3) is connected to the medium tank (5). The third connecting pipe (44) is equipped with a third delivery pump (45). The third delivery pump (45) is used to deliver the heat preservation medium in the water storage chamber (41) to the medium tank (5). The bottom of each of the multiple partitions (34) is equipped with a one-way valve (35). The one-way valve (35) is used to prevent the heat preservation medium in the heat preservation chamber (31) from flowing towards the center of the furnace (1). The end of the second connecting pipe (42) away from the energy storage component (4) extends to the bottom of the heat preservation chamber (31) and is located between the inner wall of the heat preservation chamber (31) near the furnace (1) and the outermost partition (34).

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