A high-temperature industrial furnace with a temperature zone atmosphere isolation function

Abstract

The present invention relates to the technical field of high-temperature heat treatment equipment, and particularly relates to a high-temperature industrial furnace with a function of isolating the atmosphere in temperature zones; it includes an atmosphere isolation device arranged in the transition area between two adjacent temperature zones along the furnace length direction. The atmosphere isolation device comprises an air curtain generating mechanism and a negative pressure air extraction mechanism: the air outlets of the air curtain generating mechanism are distributed on the left and right sides in the furnace width direction, and the air curtain generating mechanism sprays preheated protective gas towards the perpendicular bisector in the furnace width direction to form an air curtain barrier; the negative pressure air extraction mechanism is located above the air curtain generating mechanism, and the suction port of the negative pressure air extraction mechanism is directly above the air curtain of the air curtain generating mechanism; the present invention preheats the intake air of the air curtain generating mechanism to the furnace, and at the same time realizes the synergistic effect of "air curtain isolation + active suction" through the air curtain generating mechanism and the negative pressure air extraction mechanism, achieving effective atmosphere isolation of different temperature zones in the furnace through the air curtain.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature heat treatment equipment, and particularly to a high-temperature industrial furnace with a function of isolating the atmosphere in temperature zones. Background Art

[0002] A high-temperature industrial furnace is a continuous industrial heat treatment equipment, which is divided into various furnace types such as pusher furnaces, roller hearth furnaces, and mesh belt furnaces. The main structure consists of a preheating zone (also known as a heating-up zone), a firing zone, and a cooling zone (also known as a cooling-down zone). Hereinafter, a pusher furnace will be mainly taken as an example for illustration.

[0003] The industrial furnace makes the pusher carrying the material move uniformly along the furnace track through a hydraulic or mechanical propulsion system to complete the heating, sintering, and cooling processes of the material. Its furnace chamber is usually constructed with high-temperature resistant materials (such as silicon nitride bonded silicon carbide and other materials) and can adapt to different process atmospheres (such as various protective gases, air, etc.).

[0004] In the multi-temperature zone collaborative sintering process of a pusher-type tunnel furnace, in order to meet the requirements of the product sintering process, the heating temperatures of different temperature zones need to be different, and the intake air volume and even the type of atmosphere in different temperature zones are also different. In the prior art, a physical partition is provided between every two adjacent temperature zones along the length direction of the furnace (this physical partition is usually called a "partition beam". The partition beam on a pusher furnace is usually made of alumina bricks, and the partition beam on a roller hearth furnace is usually made of alumina pipes). In the cross-sectional direction of the furnace chamber, the partition beam is smaller than the inner size of the furnace chamber (i.e., it retracts a little into the furnace chamber), which does not prevent the product from passing through. However, the effect of the partition beam is still insufficient, and there will still be a problem that in adjacent temperature zones, the heat in the high-temperature zone will diffuse to the low-temperature zone, resulting in out-of-control temperature distribution and gas cross-flow between adjacent temperature zones, thereby affecting the sintering quality of the product. In the prior art, there is also an air curtain-type atmosphere partition structure provided between adjacent temperature zones, which forms an air curtain by spraying gas through a pipeline. The materials of the above-mentioned pipeline are divided into two types. One is a metal pipeline. A vertical metal pipeline is respectively arranged on the left and right sides along the width direction of the furnace chamber, or a U-shaped metal pipeline is arranged around the left and right sides and the top along the width direction of the furnace chamber. Row holes are drilled on the metal pipeline, and air is blown into the furnace through the row holes to form an air curtain. However, the metal pipeline can only be applied in the low-temperature furnace or the heating and cooling sections of the high-temperature furnace and cannot be applied in the high-temperature section (because the metal pipeline cannot withstand high temperatures). The other is a ceramic pipeline. Row holes are drilled on the ceramic pipeline, and air is blown into the furnace through the row holes to form an air curtain. Since the ceramic material has no toughness and cannot be bent or welded, only multiple straight pipelines can be arranged on the left and right sides along the width direction of the furnace chamber or on the left and right sides and the top at the same time. In this way, the processability of the connection of the ceramic pipeline is much worse than that of the metal pipeline, and the pipeline connection is prone to air leakage. Although the ceramic pipeline can withstand high temperatures, it is prone to cracking or even breaking after being used in a high-temperature furnace body for a long time. Once it falls on the kiln track, it will cause the furnace to jam and the furnace will be forced to stop for maintenance, resulting in significant or even major economic losses. Due to the above-mentioned defects of the existing partition beam or air curtain-type atmosphere partition structure in industrial kilns, the effect of the atmosphere partition in the furnace needs to be fundamentally improved and enhanced to meet the increasingly stringent requirements of product sintering quality. A high-temperature industrial kiln with a temperature zone atmosphere partition function is proposed to solve the problems existing in the prior art. Summary of the Invention

[0005] The object of the present invention is to provide a high-temperature industrial kiln with a temperature zone atmosphere partition function to solve the problems of furnace jamming and poor atmosphere partition effect caused by unreasonable atmosphere partition structures in the prior art.

[0006] The technical solution of the present invention is: A high-temperature industrial kiln with a temperature zone atmosphere partition function, comprising:

[0007] An atmosphere partition device arranged in the transition area between two adjacent temperature zones along the furnace length direction, comprising:

[0008] (a)The air curtain generating mechanism with air outlets distributed on the left and right sides in the furnace width direction sprays preheated protective gas towards the perpendicular bisector in the furnace width direction to form an air curtain barrier;

[0009] (b)The negative pressure air extraction mechanism located above the air curtain generating mechanism, whose air suction port is directly above the air curtain of the air curtain generating mechanism;

[0010] The air inlet channel of the air curtain generating mechanism and the exhaust channel of the negative pressure air extraction mechanism are both spliced and built by refractory components with holes inside.

[0011] Preferably, the air inlet channel of the air curtain generating mechanism is an air inlet pipe, and the air inlet pipe includes a plurality of left air inlet branch pipes arranged in parallel and at equal intervals along the furnace height direction blowing air relatively, and a plurality of right air inlet branch pipes arranged in parallel and at equal intervals along the furnace height direction; the air inlet pipe is supplied with gas through a gas supply assembly;

[0012] The exhaust channel of the negative pressure air extraction mechanism is an exhaust pipe, and the gas in the exhaust pipe is extracted through an air extraction assembly.

[0013] Preferably, the air inlet pipe further includes a main air inlet pipe connected to the gas supply assembly, a left air inlet pipe and a right air inlet pipe respectively connected to the main air inlet pipe; a plurality of the left air inlet branch pipes are connected to the left air inlet pipe, and a plurality of the right air inlet branch pipes are connected to the right air inlet pipe;

[0014] The left air inlet pipe and the right air inlet pipe are arranged symmetrically about the left and right axes.

[0015] Preferably, the central axis of each left air inlet branch pipe is in the horizontal direction, the central axis of each right air inlet branch pipe is in the horizontal direction, and the plurality of left air inlet branch pipes and the plurality of right air inlet branch pipes are symmetric about the left and right axes.

[0016] Preferably, the exhaust pipe includes a plurality of exhaust branch pipes arranged symmetrically in the vertical direction on the left and right, and a main exhaust pipe respectively connected to the plurality of exhaust branch pipes. The air inlet ports of the plurality of exhaust branch pipes are directly above the air curtain of the air curtain generating mechanism;

[0017] The refractory component is a refractory brick; a plurality of the exhaust branch pipes are arranged in the top beam brick. The top beam brick includes a left top beam brick, a middle top beam brick, and a right top beam brick spliced in sequence along its length direction. The left top beam brick and the right top beam brick are built on the refractory bricks below them, and the middle top beam is embedded between the left top beam brick and the right top beam brick.

[0018] Preferably, the surface of the left top beam brick that contacts the middle top beam brick is a first stepped surface with the upper end far from the middle top beam brick, the lower end close to the middle top beam brick, and provided with steps. The surface of the right top beam brick that contacts the middle top beam brick is a second stepped surface with the upper end far from the middle top beam brick, the lower end close to the middle top beam brick, and provided with steps. The upper end of the middle top beam brick is wide and the lower end is narrow. The two side end faces of the middle top beam brick are a third stepped surface that fits with the first stepped surface and a fourth stepped surface that fits with the second stepped surface respectively.

[0019] Preferably, the left intake pipe includes a left intake horizontal pipe and a left intake vertical pipe that are connected in sequence. The left intake horizontal pipe is connected to the main intake pipe, and the left intake vertical pipe is respectively connected to a plurality of left intake branch pipes.

[0020] The right intake pipe includes a right intake horizontal pipe and a right intake vertical pipe that are connected in sequence. The right intake horizontal pipe is connected to the main intake pipe, and the right intake vertical pipe is respectively connected to a plurality of right intake branch pipes.

[0021] The heater preheats the intake air of the air curtain generating mechanism into the furnace. The heater is located below the furnace and above the left intake horizontal pipe and the right intake horizontal pipe. The left intake vertical pipe and the right intake vertical pipe are located on both sides of the heater.

[0022] Preferably, a plurality of the left intake branch pipes are arranged on the left partition beam brick, and a plurality of the right intake branch pipes are arranged on the right partition beam brick. Part of the left partition beam brick is built on the lower partition beam brick, and part of the right partition beam brick is built on the lower partition beam brick.

[0023] Preferably, the bottom of the high-temperature industrial furnace furnace is a guide rail assembly. The guide rail assembly includes a left guide rail side strip and a right guide rail side strip that guide the push plate of the high-temperature industrial furnace on both sides, and a guide rail middle strip that supports the push plate of the high-temperature industrial furnace. Baffles are respectively lapped between the left guide rail side strip and the guide rail middle strip, and between the right guide rail side strip and the guide rail middle strip.

[0024] The left guide rail side strip, the right guide rail side strip, and the guide rail middle strip are installed on the lower partition beam brick.

[0025] Preferably, each furnace of the high-temperature industrial furnace is provided with a furnace intake assembly and a furnace exhaust assembly.

[0026] The air supply assembly includes an intake fan connected to the main intake pipe and a protective gas source connected to the intake fan through a pipe. The air extraction assembly includes an exhaust fan connected to the main exhaust pipe.

[0027] Compared with the prior art, the advantages of the present invention are:

[0028] (1) A high-temperature industrial furnace with a temperature zone atmosphere isolation function in the present invention includes an atmosphere isolation device provided in the transition area between adjacent different temperature zones. The atmosphere isolation device comprises an air curtain generation mechanism and a negative pressure air extraction mechanism. The air outlets of the air curtain generation mechanism are distributed on the left and right sides in the furnace width direction. The air curtain generation mechanism sprays preheated protective gas towards the mid-perpendicular line in the furnace width direction to form an air curtain barrier. The negative pressure air extraction mechanism is located above the air curtain generation mechanism, and the suction port of the negative pressure air extraction mechanism is directly above the air curtain of the air curtain generation mechanism. In the present invention, in this embodiment, the intake air of the air curtain generation mechanism is preheated, and at the same time, the "air curtain isolation + active air extraction" synergistic effect is achieved through the air curtain generation mechanism and the negative pressure air extraction mechanism, realizing the efficient atmosphere isolation of the air curtain. The combination of the three cooperates with each other to produce a synergistic effect, solving the problem of poor atmosphere isolation effect caused by unreasonable atmosphere isolation structure in the prior art. The intake air passage of the air curtain generation mechanism and the exhaust air passage of the negative pressure air extraction mechanism are both spliced and built by refractory components with holes inside, solving the problem of furnace jamming caused by unreasonable atmosphere isolation structure in the prior art.

[0029] (2) The setting of the negative pressure air extraction mechanism of a high-temperature industrial furnace with a temperature zone atmosphere isolation function in the present invention, on the one hand, forms an air curtain through the protective gas. However, the protective gas cannot go towards the middle of the furnace, which will affect the product sintering. Therefore, it is necessary to extract the protective gas. On the other hand, the atmospheres of different temperature zones on both sides of the air curtain will come over, and the negative pressure air extraction mechanism can extract this part of the atmosphere, without affecting the atmosphere cross-flow in adjacent temperature zones. And the negative pressure air extraction mechanism is located above the air curtain generation mechanism, and the suction port of the negative pressure air extraction mechanism is directly above the air curtain of the air curtain generation mechanism. The up-and-down layout of the air curtain and the suction port conforms to the physical property of hot gas rising naturally, and at the same time, it can avoid suction turbulence, and can form the "air curtain isolation + active air extraction" synergistic effect, realizing the effective atmosphere isolation of different temperature zones in the furnace through the air curtain.

[0030] (3) In a high-temperature industrial furnace with a temperature zone atmosphere isolation function in the present invention, the left intake pipe and the right intake pipe are symmetrically arranged left and right, which can ensure the same gas flow rate and flow volume on both sides. In this way, the thickness and speed of the generated air curtain will be more uniform, avoiding local weak points. Multiple left intake branch pipes and multiple right intake branch pipes are symmetrically arranged left and right, so that the air flow sprays out parallelly from the symmetrical directions. The gases sprayed out from the left intake branch pipes and the right intake branch pipes form an overlapping covering layer with gaps.

[0031] (4) In a high-temperature industrial furnace with a temperature zone atmosphere isolation function in the present invention, the top beam bricks are arranged in multiple sections instead of a single integral brick in the prior art. The multi-section arrangement can avoid the problem that the top beam bricks are too long and will crack after a long time in a furnace body with temperature rise and fall. At the same time, the middle top beam brick is stuck between the left top beam brick and the right top beam brick through steps, solving the problem of piling up the middle top beam brick, and the piling up of the middle top beam brick is very convenient.

[0032] (5) In a high-temperature industrial furnace with a temperature zone atmosphere isolation function in the present invention, the heater is located below the furnace chamber, preferably heating the bottom area of the furnace chamber, and then heating the furnace chamber. At the same time, the heater preheats the intake air of the air curtain generating mechanism to prevent relatively cold protective gas from directly entering the furnace and reducing the furnace temperature. That is, the heater serves both the furnace chamber and the protective gas at the same time, without the need to separately set a heater for the protective gas, improving the utilization rate of the heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below with reference to the drawings and embodiments:

[0034] Figure 1 is a schematic structural diagram of a high-temperature industrial furnace with a temperature zone atmosphere isolation function according to this embodiment;

[0035] Figure 2 is Figure 1 a schematic structural diagram at A-A in;

[0036] Figure 3 is Figure 1 a schematic structural diagram at B-B in;

[0037] Figure 4 is Figure 3 a schematic structural diagram at K-K in;

[0038] Figure 5 is Figure 3 an enlarged schematic structural diagram at C in.

[0039] Wherein: 1. Atmosphere isolation device, 2. Left intake branch pipe, 3. Right intake branch pipe, 4. Left intake horizontal pipe, 5. Left intake vertical pipe, 6. Right intake horizontal pipe, 7. Right intake vertical pipe, 8. Main intake pipe, 9. Exhaust branch pipe, 10. Main exhaust pipe, 11. Left top beam brick, 12. Middle top beam brick, 13. Right top beam brick, 14. Left partition beam brick, 15. Right partition beam brick, 16. Lower partition beam brick, 17. Left guide rail side strip, 18. Right guide rail side strip, 19. Guide rail middle strip, 20. Heater, 21. Baffle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] The content of the present invention will be further described in detail below with reference to specific embodiments:

[0041] In the description of the invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0042] Such as Figure 1As shown in the figure, a high-temperature industrial furnace with a temperature zone atmosphere isolation function, such as a pusher-type tunnel furnace with a straight-through interior, includes: an atmosphere isolation device 1 provided in the transition area between two adjacent temperature zones along the furnace length direction. The atmosphere isolation device 1 includes an air curtain generation mechanism and a negative pressure air extraction mechanism: the air outlets of the air curtain generation mechanism are distributed on the left and right sides in the furnace width direction, and the air curtain generation mechanism sprays preheated protective gas towards the perpendicular bisector in the furnace width direction to form an air curtain barrier; the negative pressure air extraction mechanism is located above the air curtain generation mechanism, and the suction port of the negative pressure air extraction mechanism is located directly above the air curtain of the air curtain generation mechanism; each furnace chamber of the high-temperature industrial furnace is provided with a furnace chamber air inlet assembly and a furnace chamber air exhaust assembly. In the prior art, there is only a furnace chamber air exhaust assembly provided in the middle of the furnace top, and there is no negative pressure air extraction mechanism provided above the air curtain generation mechanism; in this embodiment, the setting of the negative pressure air extraction mechanism, on the one hand, forms an air curtain through the protective gas, but the protective gas cannot go towards the middle of the furnace chamber, otherwise it will affect the sintering of the product, so the protective gas needs to be extracted; on the other hand, the atmospheres of different temperature zones on both sides of the air curtain will come over, and the negative pressure air extraction mechanism can extract this part of the atmosphere, so that the atmosphere cross-flow between adjacent temperature zones will not occur. In this embodiment, the negative pressure air extraction mechanism is located above the air curtain generation mechanism, and the suction port of the negative pressure air extraction mechanism is located directly above the air curtain of the air curtain generation mechanism. The up-and-down layout of the air curtain and the suction port conforms to the physical property of hot gas rising naturally, and at the same time can avoid suction turbulence, and can realize the synergistic effect of "air curtain isolation + active suction", realizing the effective atmosphere isolation of different temperature zones of the furnace chamber through the air curtain. In addition, in the prior art, only the gas is discharged through the discharge holes on the pipeline, and the sprayed gas will flow directly into the furnace chamber in the furnace length direction. The direct entry of the gas into the furnace chamber forms an air flow disturbance, which will affect the sintering quality of the product; in this embodiment, the gas is sprayed on the left and right sides in the furnace width direction, and then the sprayed gas is extracted from the top. In this way, the air curtain is in the form of a complete air flow in the plane perpendicular to the furnace length direction where the top beam brick, the left partition beam brick 14, and the right partition beam brick 15 are located (forming a complete air curtain), and the gas flow is more stable; but like in the prior art, only spraying gas through the pipeline without the function of air extraction, the gas is dispersed after being blown out from the discharge holes, directly forming turbulence and unable to form a stable air curtain; of course, if the flow rate and pressure of the gas sprayed out from the pipeline are increased, the effect of the air curtain can be increased, but the product moves from front to back along the furnace length direction in the furnace body and passes through the air curtain, and the high-temperature sintered electronic products are usually very small. If the flow rate and pressure of the gas sprayed out from the pipeline are slightly larger, the product will be blown down, which is not allowed in the product production process; therefore, by setting the negative pressure air extraction mechanism, the air flow rate and pressure blown out from the air holes in the left partition beam brick 14 and the right partition beam brick 15 can be realized. Even if the adjustment is small, a stable air curtain can still be formed. Using a smaller air flow also significantly reduces the air flow consumption and reduces the energy consumption.

[0043] As Figure 2 、Figure 3 , Figure 5 As shown, the intake channel of the air curtain generating mechanism and the exhaust channel of the negative pressure air extraction mechanism are both spliced and built by refractory components with holes inside. The refractory component in this embodiment is refractory brick. In the prior art, the ceramic air duct will break when used in a high-temperature furnace for a long time, but the refractory brick has good thermal stability under high-temperature conditions and will not crack during long-term use. In this embodiment, the refractory brick is a special-shaped brick fired by opening a mold, and various holes are provided in the refractory brick, and the refractory bricks are assembled into an air duct. In this embodiment, holes are drilled in the refractory brick to form a duct, which solves the problems brought by using metal ducts and ceramic ducts in the prior art. The atmosphere isolation device 1 in this embodiment can be used in high-temperature industrial furnaces at 1500°C to 1700°C. In a tunnel-type direct-through industrial kiln, in order to ensure the sintering process of the product, it is necessary to set a partition beam in the transition area between two adjacent temperature zones along the furnace length direction. In this embodiment, air ducts are formed by splicing holes in the partition beam bricks, and the existing structure is successfully used for new design. The partition beam bricks with holes have both the function of a partition beam and the function of generating an air curtain, which solves the problems existing in the prior art; moreover, there is no need to specifically make a separate air curtain structure inside the furnace chamber, saving the space inside the furnace, reducing the structural complexity of the furnace chamber, and reducing the manufacturing cost of the kiln.

[0044] The intake channel of the air curtain generating mechanism is an intake pipe, and the intake pipe includes a plurality of left intake branch pipes 2 arranged in parallel at equal intervals along the furnace height direction and a plurality of right intake branch pipes 3 arranged in parallel at equal intervals along the furnace height direction that blow against each other; the intake pipe is supplied with gas through a gas supply assembly, and the gas supply assembly includes an intake fan connected to the main intake pipe, a protective gas source connected to the intake fan, and the intake air flow rates of the plurality of left intake branch pipes 2 and the plurality of right intake branch pipes 3 are adjusted through an intake valve; as Figure 4As shown, the intake pipe further includes a main intake pipe 8 communicating with the air supply assembly, a left intake pipe and a right intake pipe respectively communicating with the main intake pipe 8; a plurality of left intake branch pipes 2 communicate with the left intake pipe, and a plurality of right intake branch pipes 3 communicate with the right intake pipe; the left intake pipe includes a left intake horizontal pipe 4 and a left intake vertical pipe 5 connected in sequence, the left intake horizontal pipe 4 communicates with the main intake pipe 8, and the left intake vertical pipe 5 communicates with a plurality of left intake branch pipes 2 respectively; the right intake pipe includes a right intake horizontal pipe 6 and a right intake vertical pipe 7 connected in sequence, the right intake horizontal pipe 6 communicates with the main intake pipe 8, and the right intake vertical pipe 7 communicates with a plurality of right intake branch pipes 3 respectively; the left intake pipe and the right intake pipe are arranged symmetrically about the left and right axes; the central axis of each left intake branch pipe 2 is in the horizontal direction, the central axis of each right intake branch pipe 3 is in the horizontal direction, and a plurality of left intake branch pipes 2 and a plurality of right intake branch pipes 3 are symmetrically arranged about the left and right axes. The left intake pipe and the right intake pipe are symmetrically arranged about the left and right axes, which can ensure that the gas flow rate and flow rate on both sides are the same, so that the thickness and speed of the generated air curtain will be more uniform, avoiding local weak points; a plurality of left intake branch pipes 2 and a plurality of right intake branch pipes 3 are symmetrically arranged about the left and right axes, so that the air flow is ejected parallel from the symmetrical directions, and the gases ejected from the left intake branch pipes 2 and the right intake branch pipes 3 are superimposed to form a gapless covering layer.

[0045] The exhaust passage of the negative pressure air extraction mechanism is an exhaust pipe, and the gas in the exhaust pipe is extracted by the air extraction assembly. The exhaust pipe includes a plurality of exhaust branch pipes 9 arranged symmetrically about the left and right in the vertical direction, a main exhaust pipe 10 respectively communicating with the plurality of exhaust branch pipes 9, the air inlet of the plurality of exhaust branch pipes 9 is located directly above the air curtain of the air curtain generating mechanism, and the air extraction assembly includes an exhaust fan communicating with the main exhaust pipe 10, and controls the air extraction volume of the plurality of exhaust branch pipes 9 through an air outlet valve.

[0046] A plurality of exhaust branch pipes 9 are arranged in the top beam bricks. The top beam bricks include a left top beam brick 11, a middle top beam brick 12, and a right top beam brick 13 that are spliced in sequence along the length direction thereof. Exhaust branch pipes are arranged in the left top beam brick 11, the middle top beam brick 12, and the right top beam brick 13. The plurality of exhaust branch pipes are arranged side by side to cover the width direction of the furnace chamber, so that the air curtain air flow uniformly moves upward from bottom to top, and the air curtain formed is uniform and sufficient; the left top beam brick 11 and the right top beam brick 13 are laid on the refractory bricks below the two, and the middle top beam is embedded between the left top beam brick 11 and the right top beam brick 13. The surface of the left top beam brick 11 that contacts the middle top beam brick 12 is a first stepped surface with the upper end far from the middle top beam brick 12, the lower end close to the middle top beam brick 12, and provided with steps. The surface of the right top beam brick 13 that contacts the middle top beam brick 12 is a second stepped surface with the upper end far from the middle top beam brick 12, the lower end close to the middle top beam brick 12, and provided with steps; the upper end of the middle top beam brick 12 is wide and the lower end is narrow. The two side end faces of the middle top beam brick 12 are a third stepped surface that fits with the first stepped surface and a fourth stepped surface that fits with the second stepped surface respectively. In this embodiment, the top beam bricks are arranged in multiple sections instead of a single whole brick in the prior art. The multiple-section arrangement can avoid the problem that the top beam bricks are too long and will crack after a long time in the furnace body during heating and cooling; at the same time, the middle top beam brick 12 is stuck between the left top beam brick 11 and the right top beam brick 13 through steps, solving the problem of piling up the middle top beam brick 12, and the piling up of the middle top beam brick 12 is very convenient.

[0047] The heater 20 preheats the intake air of the air curtain generating mechanism. The heater 20 is located below the furnace chamber and above the left intake horizontal pipe 4 and the right intake horizontal pipe 6. The left intake vertical pipe 5 and the right intake vertical pipe 7 are located on both sides of the heater 20. The heater 20 is located below the furnace chamber, preferably heating the bottom area of the furnace chamber, and then heating the furnace chamber; at the same time, the heater 20 preheats the intake air of the air curtain generating mechanism to prevent the relatively cold protective gas from directly entering the furnace and reducing the furnace temperature; that is, the heater 20 serves both the furnace chamber and the protective gas at the same time, without the need to separately set a heater 20 for the protective gas, improving the utilization rate of the heater 20.

[0048] A plurality of left intake branch pipes 2 are arranged on the left partition beam brick 14, and a plurality of right intake branch pipes 3 are arranged on the right partition beam brick 15; a part of the left partition beam brick 14 is laid on the lower partition beam brick 16, and a part of the right partition beam brick 15 is laid on the lower partition beam brick 16.

[0049] The bottom of the hearth of the high-temperature industrial furnace is a guide rail assembly. The guide rail assembly includes a left guide rail side strip 17 and a right guide rail side strip 18 that guide the push plate of the high-temperature industrial furnace on both sides, and a guide rail middle strip 19 that supports the push plate of the high-temperature industrial furnace. Baffles 21 are respectively lapped between the left guide rail side strip 17 and the guide rail middle strip 19, and between the right guide rail side strip 18 and the guide rail middle strip 19. The setting of the baffles 21 can prevent slag from falling into the bottom surface of the hearth; the left guide rail side strip 17, the right guide rail side strip 18, and the guide rail middle strip 19 are installed on the lower partition beam brick 16.

[0050] The function of the vertical air curtain is to separate the atmospheres of two adjacent temperature zones, prevent the atmospheres of two adjacent temperature zones from flowing into each other, avoid mutual influence, and reduce the consumption of gas used in the furnace by the customer; at the same time, it prevents the adjacent temperature zones from having temperature leakage, reduces the energy consumption of each temperature zone, and achieves an energy-saving effect. In summary, in this embodiment, the air inlet channel of the air curtain generating mechanism and the exhaust channel of the negative pressure air extraction mechanism are both spliced and built by refractory components with holes inside, solving the problem of furnace jamming caused by unreasonable atmosphere partition structure in the prior art; in this embodiment, the air inlet of the air curtain generating mechanism is preheated, and at the same time, the "air curtain isolation + active suction" synergistic effect is realized through the air curtain generating mechanism and the negative pressure air extraction mechanism, realizing the efficient atmosphere isolation of the air curtain. The combination of the three cooperates with each other to produce a synergistic effect, solving the defect of the atmosphere partition effect caused by the unreasonable atmosphere partition structure in the prior art.

[0051] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A high-temperature industrial kiln with a temperature zone atmosphere isolation function, characterized in that: include: The atmosphere isolation device is arranged in the transition area between two adjacent temperature zones along the length of the furnace, comprising: (a) An air curtain generating mechanism with air outlets distributed on the left and right sides of the furnace width direction, which sprays preheated protective gas toward the mid-vertical line in the furnace width direction to form an air curtain barrier; (b) a negative pressure exhaust mechanism located above the air curtain generating mechanism, wherein the suction port of the negative pressure exhaust mechanism is located directly above the air curtain of the air curtain generating mechanism; The air inlet passage of the air curtain generating mechanism and the exhaust passage of the negative pressure exhaust mechanism are both formed by splicing and masonry of refractory components with holes inside; The air inlet passage of the air curtain generating mechanism is an air inlet pipe, and the air inlet pipe comprises a plurality of left air inlet branches arranged in parallel and at equal intervals along the height direction of the furnace relative to the air blowing, and a plurality of right air inlet branches arranged in parallel and at equal intervals along the height direction of the furnace; the air inlet pipe is supplied with air through an air supply assembly; The exhaust passage of the negative pressure exhaust mechanism is an exhaust pipe, and the gas in the exhaust pipe is exhausted through the exhaust assembly; The exhaust pipe comprises a plurality of exhaust branch pipes arranged vertically and symmetrically, and a main exhaust pipe connected to the plurality of exhaust branch pipes respectively, and the air inlets of the plurality of exhaust branch pipes are located directly above the air curtain of the air curtain generating mechanism; The refractory component is a refractory brick; the plurality of exhaust branch pipes are arranged in the top beam brick, the top beam brick comprises a left top beam brick, a middle top beam brick, and a right top beam brick which are sequentially spliced ​​along the length direction thereof, the left top beam brick and the right top beam brick are laid on the refractory bricks below the left top beam brick and the right top beam brick, and the middle top beam is embedded between the left top beam brick and the right top beam brick; The surface of the left top beam brick in contact with the middle top beam brick is a first step surface with a step arranged on the upper end away from the middle top beam brick and the lower end close to the middle top beam brick; the surface of the right top beam brick in contact with the middle top beam brick is a second step surface with a step arranged on the upper end away from the middle top beam brick and the lower end close to the middle top beam brick; the middle top beam brick is wide at the upper end and narrow at the lower end, and the end surfaces on both sides of the middle top beam brick are respectively a third step surface matching the first step surface and a fourth step surface matching the second step surface.

2. The high-temperature industrial furnace with temperature zone atmosphere isolation function according to claim 1 is characterized in that: The air intake pipe also includes a main air intake pipe connected to the air supply assembly, a left air intake pipe and a right air intake pipe respectively connected to the main air intake pipe; a plurality of the left air intake branches are connected to the left air intake pipe, and a plurality of the right air intake branches are connected to the right air intake pipe; The left air intake pipe and the right air intake pipe are arranged symmetrically with respect to the left and right axes.

3. The high-temperature industrial furnace with temperature zone atmosphere isolation function according to claim 2 is characterized in that: The central axis of each left air intake branch pipe is horizontal, the central axis of each right air intake branch pipe is horizontal, and the plurality of left air intake branch pipes and the plurality of right air intake branch pipes are symmetrical with respect to the left and right axes.

4. The high-temperature industrial furnace with temperature zone atmosphere isolation function according to claim 2 is characterized in that: The left air intake pipe comprises a left air intake horizontal pipe and a left air intake vertical pipe which are connected in sequence, the left air intake horizontal pipe is connected to the main air intake pipe, and the left air intake vertical pipe is respectively connected to a plurality of left air intake branch pipes; The right air intake pipe comprises a right air intake horizontal pipe and a right air intake vertical pipe which are connected in sequence, the right air intake horizontal pipe is connected to the main air intake pipe, and the right air intake vertical pipe is respectively connected to a plurality of right air intake branch pipes; The heater is used to preheat the air intake from the air curtain generating mechanism to the furnace. The heater is located below the furnace and above the left and right horizontal air intake pipes. The left and right vertical air intake pipes are located on both sides of the heater.

5. The high-temperature industrial furnace with temperature zone atmosphere isolation function according to claim 2, characterized in that: A plurality of the left air intake branch pipes are arranged on the left partition beam brick, and a plurality of the right air intake branch pipes are arranged on the right partition beam brick; a portion of the left partition beam bricks are built on the lower partition beam bricks, and a portion of the right partition beam bricks are built on the lower partition beam bricks.

6. The high-temperature industrial furnace with temperature zone atmosphere isolation function according to claim 5, characterized in that: The bottom of the furnace of the high-temperature industrial kiln is a guide rail assembly, which includes a left guide rail side bar and a right guide rail side bar arranged on both sides for guiding the push plate of the high-temperature industrial kiln, and a guide rail middle bar for supporting the push plate of the high-temperature industrial kiln, and baffles are overlapped between the left guide rail side bar and the guide rail middle bar, and between the right guide rail side bar and the guide rail middle bar; The left guide rail side strip, the right guide rail side strip and the guide rail middle strip are installed on the lower partition beam bricks.

7. The high-temperature industrial furnace with temperature zone atmosphere isolation function according to claim 5, characterized in that: Each furnace of the high-temperature industrial kiln is provided with a furnace air intake assembly and a furnace exhaust assembly; The air supply component includes an air intake fan connected to the main air intake pipe and a protective gas source connected to the air intake fan. The air extraction component includes an exhaust fan connected to the main exhaust pipe.

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