High-temperature industrial kiln with temperature zone atmosphere partition function

Abstract

The invention relates to the technical field of high-temperature heat treatment equipment, in particular to a high-temperature industrial kiln with a temperature zone atmosphere partition function. Comprising an air curtain generation mechanism and a negative pressure air exhaust mechanism, and air outlets of the air curtain generation mechanism are distributed in the left side and the right side of a hearth in the width direction; the air curtain generation mechanism sprays preheated protective gas to the perpendicular bisector in the width direction of the hearth to form air curtain obstruction; the negative-pressure air exhaust mechanism is located above the air curtain generation mechanism, and an exhaust port of the negative-pressure air exhaust mechanism is located over an air curtain of the air curtain generation mechanism; inlet air from the air curtain generation mechanism to the hearth is preheated, meanwhile, the synergistic effect of'air curtain isolation and active suction 'is achieved through the air curtain generation mechanism and the negative pressure air exhaust mechanism, and effective atmosphere isolation of different temperature zones of the hearth is achieved through the air curtain.

Description

Technical Field

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

[0002] High-temperature industrial kiln is a kind of continuous industrial heat treatment equipment, which is divided into various types such as push plate furnace, roller furnace, mesh belt furnace, etc. The main structure is composed of preheating zone (also called heating zone), firing zone, cooling zone (also called cooling zone); the following mainly takes push plate furnace as an example for explanation.

[0003] Industrial kilns use hydraulic or mechanical propulsion systems to move the push plate carrying the material along the kiln track at a constant speed to complete the heating, sintering and cooling process of the material. Its furnace is usually constructed of high-temperature resistant materials (such as silicon nitride combined with 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 the push plate tunnel furnace, in order to meet the requirements of the product sintering process, the heating temperature of different temperature zones needs to be different, and the air intake and even the atmosphere type of different temperature zones are also different. In the prior art, a physical partition is set between every two adjacent temperature zones along the length of the furnace (this physical partition is usually called a "partition beam". The partition beam on the push plate furnace is usually made of alumina bricks, and the partition beam on the roller furnace is usually made of alumina pipes). In the cross-sectional direction of the furnace, the partition beam is smaller than the inner size of the furnace (that is, it is slightly retracted into the furnace), which does not hinder the passage of the product. However, the effect of the partition beam is still insufficient. In the adjacent temperature zones, the heat of the high temperature zone will diffuse to the low temperature zone, resulting in uncontrolled temperature distribution and gas cross-flow between adjacent temperature zones, thereby affecting the quality of product sintering; in the prior art, there is also an air curtain atmosphere partition structure set between adjacent temperature zones, which forms an air curtain by ejecting gas through a pipeline. The materials of the above-mentioned pipes are divided into two types. One is a metal pipe. A vertical metal pipe is set on the left and right sides of the width direction of the furnace, or a U-shaped metal pipe is set around the left and right sides and the top of the width direction of the furnace. A row of holes is punched on the metal pipe, and air is blown into the furnace through the holes to form an air curtain. However, the metal pipe can only be used in the heating and cooling sections of low-temperature furnaces or high-temperature furnaces, and cannot be used in high-temperature sections (because the metal pipe cannot withstand high temperatures); the other is a ceramic pipe. A row of holes is punched on the ceramic pipe, and air is blown into the furnace through the holes to form an air curtain. Since ceramic materials have no toughness and cannot be bent and welded, multiple straight pipes can only be set on the left and right sides of the width direction of the furnace or on the left and right sides and the top at the same time. In this way, the processability of ceramic pipe connection is very poor compared to metal pipes, and the pipe connection is prone to leakage. Although ceramic pipes can withstand high temperatures, they are prone to cracking or even breaking after long-term use in high-temperature furnaces. Once they fall on the kiln track, the furnace will be stuck and the furnace will be forced to stop for maintenance, causing significant or even major economic losses. Due to the above defects of the existing partition beam or air curtain atmosphere partition structure of 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 purpose of the present invention is to provide a high-temperature industrial kiln with a temperature zone atmosphere isolation function to solve the problems of furnace jamming and poor atmosphere isolation effect caused by unreasonable atmosphere isolation structure in the prior art.

[0006] The technical solution of the present invention is: a high-temperature industrial kiln with a temperature zone atmosphere isolation function, comprising: 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 building refractory components with holes inside.

[0007] Preferably, 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 supplies air through an air supply assembly; The exhaust channel of the negative pressure exhaust mechanism is an exhaust pipe, and the gas in the exhaust pipe is exhausted through the exhaust component.

[0008] Preferably, the air intake pipe further comprises 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 branch pipes are connected to the left air intake pipe, and a plurality of the right air intake branch pipes 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.

[0009] Preferably, 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 multiple left air intake branch pipes and the multiple right air intake branch pipes are symmetrical about the left and right axes.

[0010] Preferably, the exhaust pipe includes a plurality of exhaust branch pipes vertically and symmetrically arranged left and right, 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 includes 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 middle top beam is embedded between the left top beam brick and the right top beam brick.

[0011] Preferably, the surface of the left top beam brick in contact with the middle top beam brick is a first step surface with a step provided at the upper end away from the middle top beam brick and the lower end close to the middle top beam brick, and the surface of the right top beam brick in contact with the middle top beam brick is a second step surface with a step provided at 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.

[0012] Preferably, 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.

[0013] Preferably, 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; the left partition beam brick is partially built on the lower partition beam brick, and the right partition beam brick is partially built on the lower partition beam brick; Preferably, the bottom of the furnace of the high-temperature industrial kiln is a guide rail assembly, and the guide rail assembly 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.

[0014] Preferably, 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.

[0015] Compared with the prior art, the advantages of the present invention are: (1) A high-temperature industrial furnace with a temperature zone atmosphere isolation function in the present invention comprises: an atmosphere isolation device arranged in a transition area between adjacent different temperature zones, the atmosphere isolation device comprising an air curtain generating mechanism and a negative pressure exhaust mechanism: the air outlets of the air curtain generating mechanism are distributed on the left and right sides of the furnace width direction, the air curtain generating mechanism sprays preheated protective gas toward the mid-vertical line in the furnace width direction to form an air curtain barrier; the negative pressure exhaust mechanism is located above the air curtain generating mechanism, and the suction port of the negative pressure exhaust mechanism is located directly above the air curtain of the air curtain generating mechanism; in the present invention, the present invention In the embodiment, the air intake from the air curtain generating mechanism to the furnace is preheated, and at the same time, the synergistic effect of "air curtain isolation + active suction" is achieved through the air curtain generating mechanism and the negative pressure exhaust mechanism, so as to realize the efficient atmosphere isolation of the air curtain. The combination of the three cooperates with each other to produce a synergistic effect, which solves the problem of poor atmosphere isolation effect caused by unreasonable atmosphere partition structure in the prior art; the air intake channel of the air curtain generating mechanism and the exhaust channel of the negative pressure exhaust mechanism are both spliced ​​and built by refractory components with holes inside, which solves the furnace jamming problem caused by unreasonable atmosphere partition structure in the prior art.

[0016] (2) The negative pressure exhaust mechanism of a high-temperature industrial furnace with a temperature zone atmosphere isolation function in the present invention is set up. On the one hand, an air curtain is formed by protective gas, but the protective gas cannot go to the middle of the furnace, which affects the sintering of the product, so the protective gas needs to be extracted; on the other hand, the atmosphere of different temperature zones on both sides of the air curtain will come over, and the negative pressure exhaust mechanism can extract this part of the atmosphere without affecting the atmosphere cross-flow of adjacent temperature zones. The negative pressure exhaust mechanism is located above the air curtain generating mechanism, and the suction port of the negative pressure exhaust mechanism is located directly above the air curtain of the air curtain generating mechanism. The upper and lower layout of the air curtain and the suction port conforms to the physical characteristics of the natural rise of hot gas, and at the same time can avoid suction turbulence, and can form a synergistic effect of "air curtain isolation + active suction", realizing effective atmosphere isolation of different temperature zones in the furnace through the air curtain.

[0017] (3) In the high-temperature industrial kiln with the function of isolating the temperature zone atmosphere in the present invention, the left air inlet pipe and the right air inlet pipe are arranged symmetrically on the left and right axes, which can ensure that the gas flow rate and flow rate on the left and right sides are consistent, so that the thickness and speed of the generated air curtain will be more uniform, avoiding local weak points; multiple left air inlet branch pipes and multiple right air inlet branch pipes are arranged symmetrically on the left and right axes, so that the airflow is ejected in parallel from the symmetrical direction, and the gases ejected from the left and right air inlet branch pipes are superimposed to form a covering layer of the gap.

[0018] (4) In a high-temperature industrial kiln with a temperature zone atmosphere isolation function in the present invention, the top beam bricks are arranged in multiple sections rather than a single brick in the prior art. The multiple sections can avoid the problem that the top beam bricks are too long and will crack over a long period of time in the furnace body with rising and falling temperatures. At the same time, the middle top beam bricks are stuck between the left top beam bricks and the right top beam bricks through a step, solving the problem of stacking the middle top beam bricks, and the stacking of the middle top beam bricks is very convenient.

[0019] (5) In a high-temperature industrial kiln with a temperature zone atmosphere isolation function in the present invention, the heater is located below the furnace, preferably heating the bottom area of ​​the furnace, and then heating the furnace; at the same time, the heater preheats the intake air of the air curtain generating mechanism to prevent the colder protective gas from directly entering the furnace, thereby reducing the temperature in the furnace; that is, the heater serves the furnace and the protective gas at the same time, and there is no need to set up an additional heater for the protective gas, thereby improving the utilization rate of the heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 This is a schematic structural diagram of a high-temperature industrial kiln with a temperature zone atmosphere isolation function described in this embodiment; Figure 2 for Figure 1 Schematic diagram of the structure at AA in the middle; Figure 3 for Figure 1 Schematic diagram of the structure at BB in the middle; Figure 4 for Figure 3 Schematic diagram of the structure at KK; Figure 5 for Figure 3 Enlarged structural diagram at point C in the middle.

[0021] Among them: 1. atmosphere partition device, 2. left air intake branch pipe, 3. right air intake branch pipe, 4. left air intake horizontal pipe, 5. left air intake vertical pipe, 6. right air intake horizontal pipe, 7. right air intake vertical pipe, 8. main air 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

[0022] The present invention is further described in detail below in conjunction with specific embodiments: In the description of the invention, it is necessary to understand that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0023] like Figure 1As shown, a high-temperature industrial kiln with a temperature zone atmosphere isolation function, such as an internal straight-through push-plate tunnel furnace, comprises: an atmosphere isolation device 1 arranged in a transition area between two adjacent temperature zones along the length of the furnace, the atmosphere isolation device 1 comprises an air curtain generating mechanism and a negative pressure exhaust mechanism: the air outlet of the air curtain generating mechanism is distributed on the left and right sides of the furnace width direction, the air curtain generating mechanism sprays preheated protective gas toward the mid-vertical line in the furnace width direction to form an air curtain barrier; the negative pressure exhaust mechanism is located above the air curtain generating mechanism, and the suction port of the negative pressure exhaust mechanism is located directly above the air curtain of the air curtain generating mechanism; each furnace of the high-temperature industrial kiln is provided with a furnace air intake assembly and a furnace exhaust assembly. In the prior art, only a furnace exhaust assembly is provided in the middle of the furnace top, and a negative pressure exhaust mechanism is not provided above the air curtain generating mechanism; the negative pressure exhaust mechanism in this embodiment, on the one hand, forms an air curtain through the protective gas, but the protective gas cannot go to the middle of the furnace, otherwise it will affect the sintering of the product, so the protective gas needs to be extracted; on the other hand, the atmosphere of different temperature zones on both sides of the air curtain will come over, and the negative pressure exhaust mechanism can extract this part of the atmosphere, so it will not cause the atmosphere of adjacent temperature zones to flow through. In this embodiment, the negative pressure exhaust mechanism is located above the air curtain generating mechanism, and the suction port of the negative pressure exhaust mechanism is located directly above the air curtain of the air curtain generating mechanism. The upper and lower layout of the air curtain and the suction port conforms to the physical characteristics of the natural rise of hot gases, and at the same time can avoid suction turbulence, and can achieve the synergistic effect of "air curtain isolation + active suction", thereby achieving effective atmosphere isolation of different temperature zones in the furnace through the air curtain. In addition, in the prior art, gas is only discharged through the discharge holes on the pipeline, and the discharged gas will flow in the length direction of the furnace body and directly enter the furnace. The gas directly entering the furnace will form 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 width direction of the furnace, and then the sprayed gas is extracted from the top, so that the air curtain is in the form of a complete airflow in the plane perpendicular to the length direction of the furnace body 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 smoother; but like the prior art, the gas is only sprayed out through the pipeline without the function of exhausting air, and the gas is blown out from the discharge holes After being discharged, it is dispersed, directly forming turbulence, and unable to form a stable air curtain; of course, if the flow rate and pressure of the gas ejected from the pipeline are increased, the effect of the air curtain can be enhanced, but the product moves from the front to the back along the length direction of the furnace body in the furnace body, passing through the air curtain, and the electronic products sintered at high temperature are usually very small. If the gas flow rate and pressure ejected from the pipeline are slightly higher, the product will be blown down, which is not allowed in the product production process; therefore, a negative pressure exhaust mechanism is set to achieve the air flow rate and pressure of the air holes in the left partition beam brick 14 and the right partition beam brick 15, and even if it is adjusted to a smaller value, a stable air curtain can still be formed. Using a smaller airflow also significantly reduces the airflow consumption and reduces energy consumption.

[0024] like Figure 2 , Figure 3 , Figure 5 As shown, the air inlet channel of the air curtain generating mechanism and the exhaust channel of the negative pressure exhaust mechanism are both spliced ​​and built by refractory components with holes inside. The refractory components in this embodiment are refractory bricks. In the prior art, ceramic gas pipelines will break after long-term use in a high-temperature furnace body, but refractory bricks have the characteristics of good thermal stability under high temperature conditions and will not crack during long-term use. In this embodiment, the refractory bricks are special-shaped bricks fired by opening molds, and various holes are set in the refractory bricks to assemble the refractory bricks into gas pipelines. In this embodiment, holes are punched in the refractory bricks to form pipelines, which solves the problems caused by the use of metal pipes and ceramic pipes in the prior art. The atmosphere isolation device 1 in this embodiment can be used in high-temperature industrial furnaces at 1500℃ to 1700℃. In a tunnel-type straight-through industrial kiln, in order to ensure the sintering process of the product, a partition beam must be set in the transition area between two adjacent temperature zones along the length of the furnace. In this embodiment, holes are opened in the partition beam bricks and then spliced ​​to form an air duct, successfully utilizing the existing structure for a new design. The perforated partition beam bricks have both the function of a partition beam and the function of generating an air curtain, thus solving the problems existing in the prior art. Furthermore, there is no need to make a separate air curtain structure inside the furnace, thus saving space inside the furnace, while reducing the structural complexity of the furnace and the cost of kiln manufacturing.

[0025] The air inlet passage of the air curtain generating mechanism is an air inlet pipe, which includes a plurality of left air inlet branch pipes 2 arranged in parallel and at equal intervals along the furnace height direction relative to the air blowing, and a plurality of right air inlet branch pipes 3 arranged in parallel and at equal intervals along the furnace height direction; the air inlet pipe supplies air through an air supply component, and the air supply component includes an air inlet fan connected to the main air inlet pipe, a protective gas source connected to the air inlet fan, and an air inlet valve is used to adjust the air inlet flow rate of the plurality of left air inlet branch pipes 2 and the plurality of right air inlet branch pipes 3; Figure 4As shown, the air intake pipe also includes a main air intake pipe 8 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 8; a plurality of left air intake branch pipes 2 are connected to the left air intake pipe, and a plurality of right air intake branch pipes 3 are connected to the right air intake pipe; the left air intake pipe includes a left air intake horizontal pipe 4 and a left air intake vertical pipe 5 which are connected in sequence, the left air intake horizontal pipe 4 is connected to the main air intake pipe 8, and the left air intake vertical pipe 5 is respectively connected to the plurality of left air intake branch pipes 2 The right air intake pipe includes a right air intake horizontal pipe 6 and a right air intake vertical pipe 7 which are connected in sequence. The right air intake horizontal pipe 6 is connected to the main air intake pipe 8, and the right air intake vertical pipe 7 is respectively connected to a plurality of right air intake branch pipes 3. The left air intake pipe and the right air intake pipe are arranged symmetrically about the left and right axes. The central axis of each left air intake branch pipe 2 is in the horizontal direction, and the central axis of each right air intake branch pipe 3 is in the horizontal direction, and the plurality of left air intake branch pipes 2 and the plurality of right air intake branch pipes 3 are arranged symmetrically about the left and right axes. The left air intake pipe and the right air intake pipe are arranged symmetrically about the left and right axes, which can ensure that the gas flow rate and flow rate on the left and right sides are consistent, so that the thickness and speed of the generated air curtain will be more uniform, avoiding local weak points. The plurality of left air intake branch pipes 2 and the plurality of right air intake branch pipes 3 are arranged symmetrically about the left and right axes, so that the airflow is ejected in parallel from the symmetrical direction, and the gases ejected from the left air intake branch pipes 2 and the right air intake branch pipes 3 are superimposed to form a gapless covering layer.

[0026] The exhaust channel of the negative pressure exhaust mechanism is an exhaust pipe, and the gas in the exhaust pipe is extracted through the exhaust assembly. The exhaust pipe includes a plurality of exhaust branch pipes 9 arranged vertically and symmetrically, and a main exhaust pipe 10 connected to the plurality of exhaust branch pipes 9 respectively. The air inlets of the plurality of exhaust branch pipes 9 are located directly above the air curtain of the air curtain generating mechanism. The exhaust assembly includes an exhaust fan connected to the main exhaust pipe 10, and the exhaust volume of the plurality of exhaust branch pipes 9 is controlled by an air outlet valve.

[0027] Multiple exhaust branch pipes 9 are arranged in the top beam bricks, and the top beam bricks include a left top beam brick 11, a middle top beam brick 12, and a right top beam brick 13 which 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. Multiple exhaust branch pipes are arranged side by side to cover the width direction of the furnace, so that the air curtain airflow moves evenly from bottom to top, and the air curtain formed by the air curtain is even and sufficient; the left top beam brick 11 and the right top beam brick 13 are built 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 step surface with a step, the upper end of which is far away from the middle top beam brick 12 and the lower end is close to the middle top beam brick 12. The surface of the right top beam brick 13 that contacts the middle top beam brick 12 is a second step surface with a step, the upper end of which is far away from the middle top beam brick 12 and the lower end is close to the middle top beam brick 12. The middle top beam brick 12 is wide at the upper end and narrow at the lower end. The end surfaces of the middle top beam brick 12 on both sides are respectively a third step surface that matches the first step surface and a fourth step surface that matches the second step surface. In this embodiment, the top beam bricks are arranged in multiple sections, rather than a whole brick in the prior art. The multiple sections can avoid the problem that the top beam bricks are too long and will crack for a long time in the furnace body that is heated and cooled. 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 the step, which solves the stacking problem of the middle top beam bricks 12, and the stacking of the middle top beam bricks 12 is very convenient.

[0028] The heater 20 is used to preheat the intake air of the air curtain generating mechanism. The heater 20 is located below the furnace 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 and preferably heats the bottom area of ​​the furnace to heat the furnace. At the same time, the heater 20 preheats the intake air of the air curtain generating mechanism to prevent the colder protective gas from directly entering the furnace and lowering the temperature in the furnace. That is, the heater 20 serves the furnace and the protective gas at the same time, and there is no need to set up an additional heater 20 for the protective gas, thereby improving the utilization rate of the heater 20.

[0029] A plurality of left air intake branch pipes 2 are arranged on the left partition beam brick 14 , and a plurality of right air intake branch pipes 3 are arranged on the right partition beam brick 15 ; the left partition beam brick 14 is partially built on the lower partition beam brick 16 , and the right partition beam brick 15 is partially built on the lower partition beam brick 16 .

[0030] The bottom of the furnace of the high-temperature industrial kiln is a guide rail assembly, which includes a left guide rail side bar 17 and a right guide rail side bar 18 arranged on both sides to guide the push plate of the high-temperature industrial kiln, and a guide rail middle bar 19 to support the push plate of the high-temperature industrial kiln. Baffles 21 are overlapped between the left guide rail side bar 17 and the guide rail middle bar 19 and between the right guide rail side bar 18 and the guide rail middle bar 19. The setting of the baffle 21 can prevent slag from falling into the bottom of the furnace; the left guide rail side bar 17, the right guide rail side bar 18, and the guide rail middle bar 19 are installed on the lower partition beam brick 16.

[0031] The function of the vertical air curtain is to separate the atmosphere of two adjacent temperature zones, prevent the atmosphere of the two adjacent temperature zones from flowing, avoid mutual influence, and reduce the customer's furnace gas consumption; at the same time, prevent the temperature of adjacent temperature zones from flowing, reduce the energy consumption of each temperature zone, and achieve energy-saving effects. In summary, in this embodiment, the air intake channel of the air curtain generating mechanism and the exhaust channel of the negative pressure exhaust mechanism are both spliced ​​and built by refractory components with holes inside, which solves the problem of furnace jamming caused by the unreasonable atmosphere partition structure in the prior art; in this embodiment, the air intake of the air curtain generating mechanism is preheated, and at the same time, the air curtain generating mechanism and the negative pressure exhaust mechanism realize the synergistic effect of "air curtain isolation + active suction", and realize the efficient atmosphere isolation of the air curtain. The combination of the three cooperates with each other to produce a synergistic effect, which solves the defects of the atmosphere partition effect caused by the unreasonable atmosphere partition structure in the prior art.

[0032] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the scope of protection 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 the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description, and it is intended to include all changes 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 building refractory components with holes inside.

2. The high-temperature industrial furnace with temperature zone atmosphere isolation function according to claim 1 is characterized in that: 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 channel of the negative pressure exhaust mechanism is an exhaust pipe, and the gas in the exhaust pipe is exhausted through the exhaust component.

3. The high-temperature industrial furnace with temperature zone atmosphere isolation function according to claim 2 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.

4. 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.

5. The high-temperature industrial furnace with temperature zone atmosphere isolation function according to claim 3 is characterized in that: 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 includes 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 middle top beam is embedded between the left top beam brick and the right top beam brick.

6. The high-temperature industrial furnace with temperature zone atmosphere isolation function according to claim 5, characterized in that: 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.

7. The high-temperature industrial furnace with temperature zone atmosphere isolation function according to claim 3 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.

8. 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.

9. The high-temperature industrial furnace with temperature zone atmosphere isolation function according to claim 8, 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.

10. 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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