Sintering furnace for making air brick

Abstract

The present application relates to the field of sintering furnace, specifically relates to a kind of sintering furnace for making air brick, including the furnace body for placing brick blank, the top of the furnace body is provided with cover, the inside of the furnace body is provided with inverted conical furnace cavity, the furnace body is connected and is provided with the gas inlet pipe for sending inert gas to furnace cavity inside, the furnace body is connected and is provided with the gas outlet pipe for discharging high-temperature exhaust gas in furnace cavity inside;The beneficial effects of the present application are that: the temperature of brick blank in the present application does not rely on close contact with resistance heating body, the temperature in the furnace cavity relies on the diffusion of inert gas heated by resistance heating body, so that the part of air brick close to resistance heating body appears overburning phenomenon due to temperature is too high, and the part far away from heating body is not fully sintered due to insufficient temperature.

Description

Technical Field

[0001] This invention relates to the field of sintering furnace technology, and more specifically to a sintering furnace for preparing permeable bricks. Background Technology

[0002] In the field of materials processing, permeable bricks, as an important high-temperature refractory material, are widely used in high-temperature equipment such as electric furnaces. Sintering is a crucial step in the preparation of permeable bricks, determining their final physical and chemical properties and microstructure. However, existing sintering furnaces, especially resistance sintering furnaces, face a significant technical challenge in sintering permeable bricks: insufficient temperature uniformity within the furnace cavity.

[0003] As one of the most common types of sintering furnaces, the resistance sintering furnace works by providing heat through an electrically powered resistance heating element. While this heating method is simple in structure and low in cost, in practical applications, the uneven distribution of the resistance heating element leads to significant differences in temperature distribution within the furnace cavity. Specifically, the area closer to the heating element has a higher temperature, while the area farther away has a lower temperature. This temperature gradient not only affects the sintering quality of the permeable bricks but may also cause thermal stress within the permeable bricks, thus affecting their overall performance and service life.

[0004] For permeable bricks, the sintering temperature needs to be strictly controlled during the preparation process to ensure that the material achieves the ideal degree of densification and microstructure. However, due to the insufficient temperature uniformity inside the resistance sintering furnace, the permeable brick part near the resistance heating element may overheat due to excessively high temperature, resulting in a decrease in material properties; while the part far from the heating element may not sinter sufficiently due to insufficient temperature, affecting permeability and strength.

[0005] Therefore, a sintering furnace for preparing permeable bricks is needed to overcome the above problems. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a sintering furnace for preparing permeable bricks, thereby achieving the objective of resolving the issues raised in the background art.

[0007] To achieve the above objectives, the present invention specifically adopts the following technical solution: a sintering furnace for preparing permeable bricks, comprising a furnace body for placing brick blanks, a cover provided on the top of the furnace body, an inverted conical furnace cavity provided inside the furnace body, an inlet pipe for introducing inert gas into the furnace cavity and an outlet pipe for discharging high-temperature waste gas from the furnace cavity.

[0008] The furnace body is equipped with a heating component for uniformly heating the brick blanks.

[0009] The heating assembly includes a heating channel for the flow of inert gas arranged in an inverted conical spiral along the furnace cavity, a resistance heating element for heating the inert gas arranged inside the heating channel, a hot air outlet arranged at the end of the heating channel and located at the bottom of the furnace cavity, a hot air hole opened on the furnace body for connecting the furnace cavity and the heating channel, and a spiral guide groove opened on the furnace body and located on the side of the furnace cavity.

[0010] The high-temperature inert gas discharged from the hot air outlet spirals upward along the spiral guide groove.

[0011] As a further improvement to the above technical solution:

[0012] The exhaust pipe is equipped with a heat exchange component for transferring the heat of the high-temperature exhaust gas to the inert gas; the inert gas is heated as it flows through the heat exchange component.

[0013] The heat exchange assembly includes a heat exchange tube, a partition fixedly connected inside the heat exchange tube to divide the internal space of the heat exchange tube into two parts, and heat exchange fins fixedly connected to the partition.

[0014] The partition divides the interior of the heat exchange tube into a high-temperature chamber and a low-temperature chamber. The outlet pipe is connected to the high-temperature chamber, and the inlet pipe is connected to the low-temperature chamber.

[0015] The heat exchange assembly is internally equipped with a cleaning component for cleaning some of the heat exchange fins located in the high-temperature cavity;

[0016] The cleaning assembly includes a brush head that is slidably disposed inside the heat exchange fins and a drive assembly disposed inside the heat exchange tube for driving the brush head to reciprocate.

[0017] The drive assembly includes a rotating shaft rotatably mounted on the partition, a blade fixedly connected to the outside of the rotating shaft and located inside the low-temperature chamber, a heat exchange fin fixedly connected to the outside of the rotating shaft and located inside the high-temperature chamber, a lever fixedly connected to the outside of the rotating shaft and located inside the high-temperature chamber, a hollow chuck rotatably mounted on the partition and located inside the high-temperature chamber, and a connecting rod hinged to the brush head; one end of the connecting rod is eccentrically hinged to the side of the hollow chuck.

[0018] The brush head consists of two identical parts. One drive component drives one part of the brush head to reciprocate, and the other part of the brush head is driven by a second drive component to reciprocate.

[0019] The second drive assembly includes a second rotating shaft rotatably mounted on the partition plate, a second blade fixedly connected to the outside of the second rotating shaft and located inside the high-temperature chamber, a second heat exchange fin fixedly connected to the outside of the second rotating shaft and located inside the low-temperature chamber, a second lever fixedly connected to the outside of the second rotating shaft and located inside the high-temperature chamber, a second hollow chuck rotatably mounted on the partition plate and located inside the high-temperature chamber, and a second connecting rod hinged to the brush head; one end of the second connecting rod is eccentrically hinged to the side of the second hollow chuck.

[0020] The heat exchange fins and baffles are an integrated structure; the first rotating shaft, the first blade, the first heat exchange fin, and the first lever are an integrated structure; the second rotating shaft, the second blade, the second heat exchange fin, and the second lever are an integrated structure.

[0021] The beneficial effects of the embodiments of the present invention are as follows:

[0022] In this application, the heating of the brick blank does not rely on close contact with the resistance heating element. The heating inside the furnace cavity relies on the diffusion of the inert gas after being heated by the resistance heating element, thereby avoiding the situation where the permeable brick part close to the resistance heating element is overburned due to excessive temperature, and the part far from the heating element is not sintered sufficiently due to insufficient temperature.

[0023] Inert gas enters the interior of the heating channel through the inlet pipe and then flows along the heating channel. At the same time, the inert gas is heated by the resistance heating element. The heated inert gas is then discharged through the hot air outlet. As the spiral guide groove spirals upward, the high-temperature inert gas can better diffuse into the interior of the furnace cavity, thereby improving the temperature uniformity inside the furnace cavity.

[0024] When the inert gas flows through the heating channel, some of the inert gas is discharged into the interior of the furnace cavity through the hot air vent. At the same time, when the inert gas discharged through the hot air outlet spirals upward along the spiral guide groove, the inert gas discharged from the hot air outlet and the inert gas discharged through the hot air vent generate turbulence, which allows the inert gas to diffuse more evenly into the interior of the furnace cavity, further improving the temperature uniformity inside the furnace cavity.

[0025] The high-temperature inert gas ejected from the hot air outlet moves along the tangential direction of the furnace cavity, which facilitates the spiral ascent of the high-temperature inert gas inside the furnace cavity; at the same time, the spiral guide groove is set to allow the high-temperature inert gas to spiral ascent better along the spiral guide groove.

[0026] The high-temperature exhaust gas discharged from the furnace cavity is discharged through the exhaust pipe. The heat of the high-temperature exhaust gas is used by the heat exchange component to heat up the inert gas flowing through the intake pipe, thereby increasing the initial temperature of the inert gas when it enters the heating channel. After the initial temperature of the inert gas when it enters the heating channel is increased, the inert gas can still be heated to the target temperature by the resistance heating element when the operating power of the resistance heating element is reduced. That is, by reusing the heat inside the high-temperature exhaust gas, the purpose of energy saving is achieved.

[0027] In actual use, the heat of the high-temperature exhaust gas entering the high-temperature chamber is conducted to the interior of the low-temperature chamber through the heat exchange fins, thereby heating the inert gas flowing through the low-temperature chamber; at the same time, the heat of the high-temperature exhaust gas can also be conducted to the baffle, which can also heat the inert gas inside the low-temperature chamber. That is, the inert gas is heated by heat exchange fins and baffles, ensuring the heating effect of the inert gas.

[0028] In actual use, since there is a lot of dust in the high-temperature exhaust gas, the dust is easy to adhere to the heat exchange fins, thus affecting the thermal conductivity of the heat exchange fins; by driving the brush head to reciprocate through the drive component, the brush head can clean the heat exchange fins located in the high-temperature chamber, so as to avoid the heat exchange fins being affected by the dust adhering to them.

[0029] The heat exchange fins located inside the high-temperature chamber can absorb the heat of the high-temperature exhaust gas and conduct it to the blades through the rotating shaft. The blades then reheat the inert gas, improving the heating effect on the inert gas.

[0030] In actual use, the brush head is equipped with bristles, which obstructs the flow of high-temperature exhaust gas, so that the high-temperature exhaust gas forms a gas cloud in the heat exchange fins, which facilitates the heat transfer of the high-temperature exhaust gas to the heat exchange fins, thereby facilitating the heating of inert gas through the heat exchange fins.

[0031] The brush head is divided into two parts, so that the two parts of the brush head can operate independently. This reduces the driving force required for the two parts of the brush head to operate, making it easier for drive component one and drive component two to drive the brush head to reciprocate.

[0032] The heat exchange fins and baffles are integrated into one structure, which facilitates heat conduction; the rotating shaft one, blade one, heat exchange fin one, and lever one are integrated into one structure, which facilitates heat conduction; the rotating shaft two, blade two, heat exchange fin two, and lever two are integrated into one structure, which facilitates heat conduction. Attached Figure Description

[0033] Figure 1This is a schematic diagram of the structure of the present invention;

[0034] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0035] Figure 3 This is a first-view structural schematic diagram of the heat exchange component of the present invention;

[0036] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0037] Figure 5 This is a schematic diagram of the heat exchange component of the present invention from a second perspective;

[0038] Figure 6 This is a schematic diagram of the structure of the brush head of the present invention;

[0039] Figure 7 This is a schematic diagram of a portion of the driving component of the present invention.

[0040] In the diagram: 1. Furnace body; 2. Cover; 3. Furnace cavity; 4. Inlet pipe; 5. Outlet pipe; 6. Heating assembly; 7. Heat exchange assembly; 8. Cleaning assembly;

[0041] 61. Heating channel; 62. Resistance heating element; 63. Hot air outlet; 64. Hot air vent; 65. Spiral guide groove;

[0042] 71. Heat exchange tube; 72. Baffle plate; 73. Heat exchange fins;

[0043] 81. Brush head; 82. Driver component one; 83. Driver component two;

[0044] 821. Rotating shaft 1; 822. Blade 1; 823. Heat exchange fin 1; 824. Actuating lever 1; 825. Hollowed-out chuck 1; 826. Connecting rod 1;

[0045] 831. Two rotating shafts; 832. Two blades; 833. Two heat exchange fins; 834. Two levers; 835. Two hollowed-out chucks; 836. Two connecting rods. Detailed Implementation

[0046] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0047] See Figures 1 to 7The present invention discloses a sintering furnace for preparing permeable bricks, including a furnace body 1 for placing brick blanks, a cover 2 on the top of the furnace body 1, an inverted conical furnace cavity 3 inside the furnace body 1, an inlet pipe 4 for feeding inert gas into the furnace cavity 3 connected to the furnace body 1, and an outlet pipe 5 for discharging high-temperature waste gas from the furnace cavity 3 connected to the furnace body 1.

[0048] The furnace body 1 is equipped with a heating component 6 for uniformly heating the brick blanks;

[0049] Multiple brick blanks are stacked inside the furnace chamber 3 using a support frame. Then, the cover 2 is closed, and the brick blanks are uniformly heated and sintered using the heating component 6. Inert gas is introduced into the furnace chamber 3 through the air inlet pipe 4 to prevent oxidation of the brick blanks during sintering, and the waste gas generated during sintering is discharged through the air outlet pipe 5.

[0050] The heating assembly 6 includes a heating channel 61 for inert gas to flow along the inverted conical spiral of the furnace cavity 3, a resistance heating element 62 for heating the inert gas disposed inside the heating channel 61, a hot air outlet 63 disposed at the end of the heating channel 61 and located at the bottom of the furnace cavity 3, a hot air hole 64 opened on the furnace body 1 for connecting the furnace cavity 3 and the heating channel 61, and a spiral guide groove 65 opened on the furnace body 1 and located on the side of the furnace cavity 3.

[0051] The high-temperature inert gas ejected from the hot air outlet 63 moves along the tangential direction of the furnace cavity 3, which facilitates the spiral rise of the high-temperature inert gas inside the furnace cavity 3; at the same time, the spiral guide groove 65 is provided so that the high-temperature inert gas can rise spirally along the spiral guide groove 65 better.

[0052] When hot air outlet 63 discharges high-temperature inert gas, the high-temperature inert gas will float upward due to the temperature. By setting hot air outlet 63 at the bottom of furnace cavity 3, the high-temperature inert gas can have sufficient time to diffuse as it rises, which helps to improve the temperature uniformity inside furnace cavity 3.

[0053] The high-temperature inert gas discharged from the hot air outlet 63 rises spirally along the spiral guide groove 65;

[0054] In this application, the heating of the brick blank does not rely on close contact with the resistance heating element 62. The heating inside the furnace cavity 3 relies on the diffusion of the inert gas heated by the resistance heating element 62, thereby avoiding the situation where the permeable brick part close to the resistance heating element 62 is overburned due to excessive temperature, and the part far away from the heating element is not sintered sufficiently due to insufficient temperature.

[0055] Inert gas enters the interior of heating channel 61 through inlet pipe 4 and then flows along heating channel 61. At the same time, the inert gas is heated by resistance heating element 62. The heated inert gas is then discharged through hot air outlet 63. As the spiral guide groove 65 spirals upward, the high temperature inert gas can better diffuse into the interior of furnace cavity 3, improving the temperature uniformity inside furnace cavity 3.

[0056] When the inert gas flows through the heating channel 61, some of the inert gas is discharged into the interior of the furnace cavity 3 through the hot air vent 64. At the same time, when the inert gas discharged through the hot air outlet 63 spirals upward along the spiral guide groove 65, the inert gas discharged from the hot air outlet 63 and the inert gas discharged from the hot air vent 64 generate turbulence, which allows the inert gas to diffuse more evenly into the interior of the furnace cavity 3, further improving the temperature uniformity inside the furnace cavity 3.

[0057] When some inert gas is discharged through the hot air vent 64, the inert gas discharged from the hot air vent 64 at the initial position of the heating channel 61 has a lower temperature, while the inert gas discharged from the hot air vent 64 at the initial position of the heating channel 61 has a higher temperature. Because the interior of the furnace cavity 3 is inverted conical, the hot air vent 64 at the initial position of the heating channel 61 is far from the center of the furnace cavity 3. Therefore, the inert gas discharged from the hot air vent 64 at the initial position of the heating channel 61 needs a longer time to contact the brick blank. During this period, the inert gas discharged from the hot air vent 64 at the initial position of the heating channel 61 is heated by the internal temperature of the furnace cavity 3. The heat ensures that the inert gas is already at a high temperature when it comes into contact with the brick blank, thus preventing uneven heating of the brick blank due to the low temperature of the inert gas discharged from the hot air vent 64 at the initial position of the heating channel 61. At the same time, since the interior of the furnace cavity 3 is inverted conical, the hot air vent 64 at the end of the heating channel 61 is close to the center of the furnace cavity 3. At this time, the temperature of the inert gas is high, and there is no need to heat the inert gas through the internal temperature of the furnace cavity 3. Therefore, the distance between the hot air vent 64 at the end of the heating channel 61 and the center of the furnace cavity 3 is set close, so that the inert gas can quickly contact the brick blank, which facilitates the heating of the brick blank.

[0058] As a further explanation of this application:

[0059] The exhaust pipe 5 is equipped with a heat exchange component 7 for exchanging the heat of the high-temperature exhaust gas into the inert gas; the inert gas is heated when it flows through the heat exchange component 7.

[0060] The high-temperature exhaust gas discharged from the furnace cavity 3 is discharged through the exhaust pipe 5. The heat of the high-temperature exhaust gas is used by the heat exchange component 7 to heat up the inert gas flowing through the intake pipe 4, thereby increasing the initial temperature of the inert gas when it enters the heating channel 61.

[0061] When the initial temperature of the inert gas increases upon entering the heating channel 61, the inert gas can still be heated to the target temperature through the resistance heating element 62 even when the operating power of the resistance heating element 62 is reduced. In other words, the heat inside the high-temperature exhaust gas is reused to achieve the purpose of energy saving.

[0062] As a further explanation of this application:

[0063] The heat exchange assembly 7 includes a heat exchange tube 71, a partition 72 fixedly connected inside the heat exchange tube 71 to divide the internal space of the heat exchange tube 71 into two, and heat exchange fins 73 fixedly connected to the partition 72.

[0064] The partition 72 divides the interior of the heat exchange tube 71 into a high-temperature chamber and a low-temperature chamber. The exhaust pipe 5 connects to the high-temperature chamber, and the inlet pipe 4 connects to the low-temperature chamber.

[0065] In actual use, the heat of the high-temperature exhaust gas entering the high-temperature chamber is conducted to the interior of the low-temperature chamber through the heat exchange fins 73, thereby heating the inert gas flowing through the low-temperature chamber.

[0066] Meanwhile, the heat from the high-temperature exhaust gas can also be conducted to the baffle 72, which can also heat the inert gas inside the low-temperature cavity. That is, the inert gas is heated by the heat exchange fins 73 and the baffle 72, ensuring the heating effect of the inert gas.

[0067] As a further explanation of this application:

[0068] The heat exchange assembly 7 is internally provided with a cleaning assembly 8 for cleaning a portion of the heat exchange fins 73 located in the high-temperature chamber;

[0069] The cleaning component 8 includes a brush head 81 that is slidably disposed inside the heat exchange fins 73, and a drive component 82 disposed inside the heat exchange tube 71 for driving the brush head 81 to reciprocate.

[0070] In actual use, since there is a lot of dust in the high-temperature exhaust gas, the dust is easy to adhere to the heat exchange fins 73, thus affecting the thermal conductivity of the heat exchange fins 73. The drive component 82 drives the brush head 81 to reciprocate, thereby cleaning the heat exchange fins 73 located in the high-temperature chamber, so as to avoid the heat exchange fins 73 being affected by the dust adhering to them.

[0071] As a further explanation of this application:

[0072] The drive assembly 82 includes a rotating shaft 821 rotatably mounted on the partition 72, blades 822 fixedly connected to the outside of the rotating shaft 821 and located inside the low-temperature chamber, heat exchange fins 823 fixedly connected to the outside of the rotating shaft 821 and located inside the high-temperature chamber, a lever 824 fixedly connected to the outside of the rotating shaft 821 and located inside the high-temperature chamber, a hollow chuck 825 rotatably mounted on the partition 72 and located inside the high-temperature chamber, and a connecting rod 826 hinged to the brush head 81; one end of the connecting rod 826 is eccentrically hinged to the side of the hollow chuck 825.

[0073] The brush head 81 consists of a fixed rod, multiple plates fixedly connected to the fixed rod, and bristles fixedly connected to the plates; the connecting rod 826 is hinged to the fixed rod.

[0074] In actual use, when the inert gas flows through the low-temperature chamber, it drives the blades 822 to rotate, which in turn drives the lever 824 to rotate via the shaft 821. The lever 824 then rotates the hollow chuck 825, which in turn drives the brush head 81 to reciprocate via the connecting rod 826, thus cleaning the heat exchange fins 73 located in the high-temperature chamber. At the same time, the heat exchange fins 823 located inside the high-temperature chamber can absorb the heat of the high-temperature exhaust gas and conduct it to the blades 822 via the shaft 821, thereby reheating the inert gas through the blades 822 and improving the heating effect of the inert gas.

[0075] In actual use, the brush head 81 is provided with bristles, which obstructs the flow of high-temperature exhaust gas, so that the high-temperature exhaust gas forms a gas cloud in the heat exchange fins 73, which facilitates the heat transfer of the high-temperature exhaust gas to the heat exchange fins 73, thereby facilitating the heating of inert gas through the heat exchange fins 73.

[0076] A lever 824 is used to drive the hollow chuck 825 to rotate. The fit between the lever 824 and the hollow chuck 825 is relatively low, which makes it easy to use in high-temperature chambers with high temperature and high dust.

[0077] As a further explanation of this application:

[0078] The brush head 81 consists of two identical parts. Drive component 1 82 drives one part of the brush head 81 to reciprocate, while the other part of the brush head 81 is driven to reciprocate by drive component 2 83.

[0079] The brush head 81 is divided into two parts, so that the two parts of the brush head 81 operate separately, thereby reducing the driving force required for the two parts of the brush head 81 to operate, which makes it easier for the drive component 1 82 and the drive component 2 83 to drive the brush head 81 to reciprocate.

[0080] As a further explanation of this application:

[0081] The second drive assembly 83 includes a rotating shaft 831 rotatably mounted on the partition 72, blades 832 fixedly connected to the outside of the rotating shaft 831 and located inside the high-temperature chamber, heat exchange fins 833 fixedly connected to the outside of the rotating shaft 831 and located inside the low-temperature chamber, a lever 834 fixedly connected to the outside of the rotating shaft 831 and located inside the high-temperature chamber, a hollow chuck 835 rotatably mounted on the partition 72 and located inside the high-temperature chamber, and a connecting rod 836 hinged to the brush head 81; one end of the connecting rod 836 is eccentrically hinged to the side of the hollow chuck 835.

[0082] In actual use, when the high-temperature exhaust gas flows through the high-temperature chamber, it drives the blade 832 to rotate, which in turn drives the lever 834 to rotate via the shaft 831. After the lever 834 rotates, it drives the hollow chuck 835 to rotate, which in turn drives the brush head 81 to move back and forth via the connecting rod 836, thereby cleaning the heat exchange fins 73 located in the high-temperature chamber. At the same time, the blade 832 located inside the high-temperature chamber can absorb the heat of the high-temperature exhaust gas and conduct it to the heat exchange fins 833 via the shaft 831, thereby heating the inert gas through the heat exchange fins 833 and improving the heating effect of the inert gas.

[0083] As a further explanation of this application:

[0084] In this application, blade 822 is set in a low-temperature chamber and is driven to rotate by inert gas, while blade 832 is set in a high-temperature chamber and is driven to rotate by high-temperature exhaust gas. That is, one blade is driven to rotate by inert gas and the other blade is driven to rotate by high-temperature exhaust gas, so as to avoid excessive resistance affecting gas flow when inert gas or high-temperature exhaust gas drives the two blades alone.

[0085] As a further explanation of this application:

[0086] The heat exchange fins 73 and the baffle 72 are integrated into one structure, which facilitates heat conduction. The rotating shaft 821, blade 822, heat exchange fin 823 and lever 824 are integrated into one structure, which facilitates heat conduction. The rotating shaft 831, blade 832, heat exchange fin 833 and lever 834 are integrated into one structure, which facilitates heat conduction.

[0087] As a further explanation of this application:

[0088] By designing the hollowed-out chuck 1 825 and hollowed-out chuck 2 835 as hollowed-out structures, the weight of the hollowed-out chuck 1 825 and hollowed-out chuck 2 835 can be reduced, making it easier for the lever 1 824 and lever 2 834 to rotate them. Secondly, since the hollowed-out chuck 1 825 and hollowed-out chuck 2 835 are located in the high-temperature chamber where high-temperature exhaust gas needs to flow, the hollowed-out structure of the hollowed-out chuck 1 825 and hollowed-out chuck 2 835 can reduce the flow resistance of the high-temperature exhaust gas.

[0089] As a further explanation of this application:

[0090] In order to improve the heating effect of heat exchange component 7 on inert gas, in actual use, heat exchange tube 71 can be set to a length of 0.8-1m, and multiple heat exchange tubes 71 can be set at intervals to heat the inert gas multiple times. When the length of heat exchange tube 71 is 0.8-1m, the brush head 81 inside the heat exchange tube 71 can easily form a gas cloud after obstructing the inert gas.

[0091] As the working principle / steps of this application:

[0092] S1. Place multiple brick blanks inside the furnace cavity 3 using a support frame, and then close the cover 2.

[0093] S2, the inlet pipe 4 introduces inert gas into the interior of the heating channel 61, replacing the interior of the furnace cavity 3 with a low-oxygen environment;

[0094] S3. Start the resistance heating element 62 to heat the inert gas inside the heating channel 61. The heated inert gas is introduced into the furnace cavity 3 through the hot air vent 64 and the hot air outlet 63, so that the furnace cavity 3 starts to heat up and sinter the brick blank.

[0095] S4. The high-temperature waste gas generated during the heating and sintering of the brick blank is discharged through the exhaust pipe 5, so that the high-temperature waste gas enters the high-temperature chamber inside the heat exchange tube 71. The heat in the high-temperature waste gas is conducted to the low-temperature chamber through the heat exchange fins 73 and the baffle 72 to heat the inert gas.

[0096] S5. When S2 is performed, the inert gas entering the low-temperature chamber drives the blade 822 to rotate, thereby driving a part of the brush head 81 to reciprocate to clean the heat exchange fins 823 located in the high-temperature chamber.

[0097] S6. When S4 is performed, the high-temperature exhaust gas entering the high-temperature chamber drives the blade 832 to rotate, thereby driving another part of the brush head 81 to reciprocate to clean the heat exchange fins 823 located in the high-temperature chamber.

[0098] S7. When S5 is performed, the heat in the high-temperature exhaust gas is conducted to the low-temperature chamber through the heat exchange fins-823-rotating shaft-821-blades-822 to heat the inert gas.

[0099] S8. When S6 is performed, the heat in the high-temperature exhaust gas is conducted to the low-temperature cavity through blade 2832-rotating shaft 2831-heat exchange fin 2833 to heat the inert gas.

[0100] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0101] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0102] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0103] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A sintering furnace for preparing permeable bricks, characterized in that, The furnace includes a furnace body (1) for placing brick blanks, a cover (2) on the top of the furnace body (1), an inverted conical furnace cavity (3) inside the furnace body (1), an inlet pipe (4) for sending inert gas into the furnace cavity (3) connected to the furnace body (1), and an outlet pipe (5) for discharging high-temperature waste gas from the furnace cavity (3) connected to the furnace body (1). The furnace body (1) is equipped with a heating component (6) for uniformly heating the brick blanks. The heating assembly (6) includes a heating channel (61) for inert gas to flow along the furnace cavity (3) in an inverted conical spiral, a resistance heating element (62) for heating the inert gas inside the heating channel (61), a hot air outlet (63) located at the end of the heating channel (61) and at the bottom of the furnace cavity (3), a hot air vent (64) opened on the furnace body (1) for connecting the furnace cavity (3) and the heating channel (61), and a spiral guide groove (65) opened on the furnace body (1) and located on the side of the furnace cavity (3). The high-temperature inert gas discharged from the hot air outlet (63) rises spirally along the spiral guide groove (65); The outlet pipe (5) is equipped with a heat exchange component (7) for exchanging the heat of the high-temperature exhaust gas into the inert gas; the inert gas is heated when it flows through the heat exchange component (7); The heat exchange assembly (7) includes a heat exchange tube (71), a partition (72) fixedly connected inside the heat exchange tube (71) to divide the internal space of the heat exchange tube (71) into two, and heat exchange fins (73) fixedly connected to the partition (72). The partition (72) divides the interior of the heat exchange tube (71) into a high-temperature chamber and a low-temperature chamber. The outlet pipe (5) connects to the high-temperature chamber, and the inlet pipe (4) connects to the low-temperature chamber. The heat exchange assembly (7) is provided with a cleaning assembly (8) for cleaning a portion of the heat exchange fins (73) located in the high-temperature chamber. The cleaning assembly (8) includes a brush head (81) that is slidably disposed inside the heat exchange fins (73) and a drive assembly (82) disposed inside the heat exchange tube (71) for driving the brush head (81) to reciprocate. The drive assembly (82) includes a rotating shaft (821) rotatably mounted on the partition (72), a blade (822) fixedly connected to the outside of the rotating shaft (821) and located inside the low-temperature cavity, a heat exchange fin (823) fixedly connected to the outside of the rotating shaft (821) and located inside the high-temperature cavity, a lever (824) fixedly connected to the outside of the rotating shaft (821) and located inside the high-temperature cavity, a hollow chuck (825) rotatably mounted on the partition (72) and located inside the high-temperature cavity, and a connecting rod (826) hinged to the brush head (81); one end of the connecting rod (826) is eccentrically hinged to the side of the hollow chuck (825); When the inert gas flows through the low-temperature chamber, the inert gas drives the blade (822) to rotate, so as to drive the brush head (81) to reciprocate through the rotating shaft (821), the lever (824), the hollow chuck (825), and the connecting rod (826). At the same time, the heat exchange fin (823) absorbs the heat of the high-temperature exhaust gas and conducts it to the blade (822) through the rotating shaft (821) to reheat the inert gas. The brush head (81) consists of two identical parts. The first drive component (82) drives one part of the brush head (81) to reciprocate, and the other part of the brush head (81) is driven to reciprocate by the second drive component (83).

2. The sintering furnace for preparing permeable bricks according to claim 1, characterized in that, The second drive assembly (83) includes a second rotating shaft (831) rotatably mounted on the partition plate (72), a second blade (832) fixedly connected to the outside of the second rotating shaft (831) and located inside the high-temperature chamber, a second heat exchange fin (833) fixedly connected to the outside of the second rotating shaft (831) and located inside the low-temperature chamber, a second lever (834) fixedly connected to the outside of the second rotating shaft (831) and located inside the high-temperature chamber, a second hollow chuck (835) rotatably mounted on the partition plate (72) and located inside the high-temperature chamber, and a second connecting rod (836) hinged to the brush head (81); one end of the second connecting rod (836) is eccentrically hinged to the side of the second hollow chuck (835); When the high-temperature exhaust gas flows through the high-temperature chamber, the high-temperature exhaust gas drives the second blade (832) to rotate, so as to drive the brush head (81) to reciprocate through the second rotating shaft (831), the second lever (834), the second hollow chuck (835), and the second connecting rod (836).

3. The sintering furnace for preparing permeable bricks according to claim 2, characterized in that, The heat exchange fins (73) and the partition (72) are integrated structures; the first rotating shaft (821), the first blade (822), the first heat exchange fin (823), and the first lever (824) are integrated structures; the second rotating shaft (831), the second blade (832), the second heat exchange fin (833), and the second lever (834) are integrated structures.

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