A foamed ceramic insulation board kiln

Abstract

The present invention relates to the technical field of firing foamed thermal insulation boards, and specifically provides a foamed ceramic thermal insulation board kiln, the kiln comprising: a furnace body, the furnace body comprising a first furnace channel and a second furnace channel in a vortex shape, the first furnace channel and the second furnace channel are mutually nested, the center positions of the first furnace channel and the second furnace channel are connected, a roller conveying assembly and a combustion assembly are arranged in the furnace body, a section of the first furnace channel and the second furnace channel close to the center is set as a combustion zone, a section of the first furnace channel close to the periphery is set as a cooling zone, and a section of the second furnace channel close to the periphery is set as a preheating zone; a ventilation assembly is arranged on the furnace body, the ventilation assembly introduces hot air from the combustion zone and the cooling zone into the preheating zone; when the ventilation assembly of the present invention connects the preheating zone with the cooling zone and the combustion zone, only a shorter pipeline is needed, so that the conduction path of the hot air is short, which not only greatly saves the pipeline cost but also reduces the heat loss.

Description

Technical Field

[0001] The invention relates to the technical field of foam insulation board firing, in particular to a foam ceramic insulation board kiln. Background Art

[0002] Foamed ceramic insulation board is a closed-cell ceramic material with high porosity, made of clay tailings, ceramic fragments, river silt, adulterated materials, etc. as the main raw materials, using advanced production technology and foaming technology and high-temperature roasting.

[0003] At present, the high-temperature baking of the foamed ceramic insulation board is carried out in a kiln. The traditional kiln is a straight furnace body of several hundred meters, which is divided into a preheating section, a high-temperature section and a cooling section. In order to save energy, the hot air in the high-temperature section and the cooling section is passed into the preheating section through a pipeline for preheating. Since the kiln of the kiln is too long, a long pipeline is required, which makes the pipeline cost higher. At the same time, the conduction path of the hot air is long, resulting in high heat loss, and there is still room for improvement in energy saving effect. Therefore, the present application proposes a foamed ceramic insulation board kiln. Summary of the invention

[0004] The object of the present invention is to provide a foamed ceramic insulation board kiln to solve the problem that the energy-saving effect of the current foamed ceramic insulation board kiln is not ideal.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A foamed ceramic insulation board kiln, the kiln comprising:

[0007] A furnace body, the furnace body comprising a first furnace channel and a second furnace channel in a vortex shape, the first furnace channel and the second furnace channel are connected to each other, the center positions of the first furnace channel and the second furnace channel are connected, a roller conveying assembly and a combustion assembly are arranged in the furnace body, a section of the first furnace channel and the second furnace channel near the center is set as a combustion zone, a section of the first furnace channel near the periphery is set as a cooling zone, and a section of the second furnace channel near the periphery is set as a preheating zone;

[0008] A ventilation component is arranged on the furnace body, and the ventilation component introduces hot air from the combustion zone and the cooling zone into the preheating zone.

[0009] Furthermore, the first furnace channel and the second furnace channel are both composed of arc-shaped furnace body components connected end to end, each furnace body component has the same structure and different curvatures, and the ends of the first furnace channel and the second furnace channel located in the center are connected by a U-shaped furnace body component.

[0010] Furthermore, the roller conveyor assembly includes:

[0011] A plurality of rollers rotatably connected to the furnace body, wherein the rollers are in the shape of a cone with one end being larger than the other end, and the larger end of the rollers is located on the outer furnace wall;

[0012] A roller driving part fixedly connected to the furnace body is used to drive the roller to rotate.

[0013] Furthermore, the combustion assembly comprises:

[0014] A burner disposed in the furnace body, the burner being connected to a natural gas supply device, and the burner being provided with a gas nozzle in the furnace;

[0015] A premixing device, the premixing device is connected to the burner nozzle, the premixing device premixes the fuel gas and the combustion-supporting gas in a semi-premixing manner and passes the premixed fuel gas into the burner nozzle;

[0016] A secondary gas supply component, wherein the secondary gas supply component is provided with a combustion-supporting nozzle in the furnace, the combustion-supporting nozzle is arranged at a position close to the blank, and the gas nozzle is arranged at a position far from the blank;

[0017] The ignition assembly arranged on the secondary gas supply assembly is used to ignite the gas.

[0018] Furthermore, the gas nozzle is a square nozzle, and the gas nozzle is obliquely arranged in the thermal insulation layer, so that the gas nozzle sprays an inclined flame.

[0019] Furthermore, the ventilation assembly includes a main air pipe and a branch air pipe, the main air pipe is arc-shaped, connected to the branch air pipe, the branch air pipe is connected to the furnace body assembly, the ventilation assembly of the combustion zone is connected to the part of the preheating zone close to the combustion zone, and the ventilation assembly of the cooling zone is connected to the part of the preheating zone far from the combustion zone.

[0020] Furthermore, the ventilation component also includes:

[0021] A cold air driving unit is arranged in the combustion zone, the cold air driving unit is communicated with the main air pipe, the cold air driving unit comprises an air inlet cavity, an active fan blade, a driven fan blade and a hot air pipe, the hot air pipe is communicated with the combustion zone, the main air pipe is arranged on the side of the hot air pipe and is communicated with it, the air inlet cavity is fixedly connected to the end of the hot air pipe, the active fan blade is rotatably connected to the hot air pipe, the driven fan blade is rotatably connected to the air inlet cavity, the end of the hot air pipe is blocked by a partition in the air inlet cavity, the partition is located between the driven fan blade and the active fan blade, the active fan blade rotates under the drive of the hot air and drives the driven fan blade to rotate;

[0022] A cold air pipe is arranged on the air inlet cavity, the cold air pipe is communicated with the cooling zone, and when the driven fan blade rotates, it draws outside air and drives it into the cold air pipe.

[0023] Furthermore, the length of the second furnace channel is greater than that of the first furnace channel, the preheating zone is completely connected to the high-temperature portion of the cooling zone, and the outlets of the preheating zone and the cooling zone are not located at the same position.

[0024] Furthermore, the kiln also includes:

[0025] The trolley comprises a bearing platform and a plurality of steering rollers, the bearing platform is annular, the steering rollers are rotatably connected to the outside of the bearing platform, and the trolley is used for bearing the blank.

[0026] Furthermore, the surface of the carrying platform is uniformly provided with a plurality of air holes penetrating the carrying platform;

[0027] A supporting bracket is also provided at the bottom of the bearing platform. The supporting bracket is used to support the bearing platform and is a regular polygon.

[0028] In summary, the present invention has the following beneficial effects compared with the prior art:

[0029] The foamed ceramic insulation board kiln disclosed in the embodiment of the present invention forms a double vortex structure by setting a vortex-shaped first furnace channel and a second furnace channel. The ventilation component only needs a shorter pipeline when connecting the preheating zone, the cooling zone and the combustion zone, so that the conduction path of the hot air is short, which not only greatly saves the pipeline cost, but also reduces heat loss. At the same time, the kiln is more suitable for the shape of the factory building. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of a foamed ceramic insulation board kiln disclosed in an embodiment of the present invention.

[0031] Figure 2 The present invention is a schematic structural diagram of a roller conveyor assembly in a foamed ceramic insulation board kiln disclosed in an embodiment of the present invention.

[0032] Figure 3 The present invention is a schematic diagram of the roller drive of the roller conveyor assembly in the foamed ceramic insulation board kiln disclosed in an embodiment of the present invention.

[0033] Figure 4 This is a schematic structural diagram of a furnace body assembly disclosed in one of the embodiments of the foamed ceramic insulation board kiln disclosed in the embodiments of the present invention.

[0034] Figure 5 It is a schematic structural diagram of a combustion nozzle in a foamed ceramic insulation board kiln disclosed in an embodiment of the present invention.

[0035] Figure 6 This is a schematic structural diagram of a furnace body assembly disclosed in another embodiment of the foamed ceramic insulation board kiln disclosed in an embodiment of the present invention.

[0036] Figure 7 It is a schematic structural diagram of a trolley in a foamed ceramic insulation board kiln disclosed in an embodiment of the present invention.

[0037] Figure 8 It is a top view of a trolley in a foamed ceramic insulation board kiln disclosed in an embodiment of the present invention.

[0038] Reference numerals:

[0039] 100, furnace body; 110, first furnace channel; 120, second furnace channel; 101, insulation layer; 102, roller; 103, roller driving unit; 104, housing;

[0040] 200, combustion assembly; 210, burner nozzle; 211, gas nozzle; 220, secondary gas supply assembly; 221, combustion-supporting nozzle;

[0041] 300, ventilation assembly; 310, main air pipe; 320, air distribution pipe; 330, cold air pipe; 340, cold air drive unit; 341, air inlet cavity; 342, active fan blade; 343, driven fan blade; 344, hot air pipe;

[0042] 400, trolley; 410, carrying platform; 411, air vent; 420, steering roller; 430, supporting bracket. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0044] Figure 1 and Figure 2 As shown, a foamed ceramic insulation board kiln is provided in one embodiment of the present invention, and the kiln comprises:

[0045] A furnace body 100, the furnace body 100 comprises a first furnace track 110 and a second furnace track 120 in a vortex shape, the first furnace track 110 and the second furnace track 120 are connected to each other, the center positions of the first furnace track 110 and the second furnace track 120 are connected, a roller conveyor assembly and a combustion assembly 200 are arranged in the furnace body 100, a section of the first furnace track 110 and the second furnace track 120 near the center is set as a combustion zone, a section of the first furnace track 110 near the periphery is set as a cooling zone, and a section of the second furnace track 120 near the periphery is set as a preheating zone;

[0046] The ventilation assembly 300 is arranged on the furnace body 100, and the ventilation assembly 300 introduces hot air from the combustion zone and the cooling zone into the preheating zone.

[0047] In this embodiment, the first furnace channel 110 and the second furnace channel 120 are arranged in a vortex shape, so that the kiln is changed from a linear structure to a double vortex structure. When the foamed ceramic insulation board is fired, the foamed insulation board blank is placed on the roller conveyor assembly in the furnace body 100 by the tooling, and the foamed ceramic insulation board blank enters the furnace body 100 from the port of the first furnace channel 110. The furnace body 100 starts the combustion system, and the combustion system in the combustion zone is started. The hot air in the combustion zone enters the preheating zone through the ventilation assembly 300 and heats the air in the preheating zone, so that the blank entering the preheating zone is heated. After the blank enters the combustion zone from the preheating zone, it is fired in the combustion zone and then transferred to the cooling zone for cooling in the cooling zone. The hot air generated in the cooling zone is transported to the preheating zone by the ventilation assembly 300 to heat the air in the preheating zone.

[0048] Since the furnace body 100 is a double-vortex structure, the ventilation assembly 300 only needs a short pipeline when connecting the preheating zone, the cooling zone and the combustion zone, so that the conduction path of the hot air is short, which not only greatly saves the pipeline cost, but also reduces the heat loss;

[0049] At the same time, since most of the current factory buildings are square in shape rather than long and narrow, the length of the kiln is shorter. The double-vortex structure allows the kiln to adapt to the shape of the factory building and at the same time, it can increase the length of the kiln.

[0050] Specifically, Figure 1 As shown, the first furnace track 110 and the second furnace track 120 are both composed of arc-shaped furnace body components connected end to end, and the structure of each furnace body component is the same, except that the curvature of the arc of each furnace body component is different, and the ends of the first furnace track 110 and the second furnace track 120 located in the center are connected by a U-shaped furnace body component. Whether it is an arc-shaped furnace body component or a U-shaped furnace body component, its structure is the same, and the difference is the shape of the two;

[0051] The structure of the furnace body assembly is the same as that of the track kiln in the prior art, including an inner insulation layer 101 and an outer shell 104, wherein the insulation layer 101 is made of a refractory material (such as refractory bricks), the outer shell 104 is a metal shell, the inner side of the outer shell 104 is coated with an insulation coating, and a space for installing other structures is provided between the insulation layer 101 and the outer shell 104;

[0052] The insulation layer 101 in the furnace assembly is connected by refractory materials (such as refractory bricks) so that the insulation layer 101 is an integral structure, and the adjacent shells 104 are connected by bolts;

[0053] like Figure 2 and Figure 3 As shown, the roller conveyor assembly includes:

[0054] A plurality of rollers 102 rotatably connected to the insulation layer 101, wherein the rollers 102 are in the shape of a cone with one end larger than the other end, and the larger end of the rollers 102 is located on the insulation layer 101 on the outside;

[0055] A roller driving part 103 fixedly connected to the furnace body 100, used for driving the roller 102 to rotate;

[0056] In this embodiment, the roller driving part 103 is a prior art, and a plurality of rotating rollers are arranged on the roller driving part 103. The ends of the rollers 102 are overlapped between adjacent rollers. When the rollers on the roller driving part 103 rotate, the adjacent rollers drive the rollers 102 to rotate, so that the rollers 102 drive the blank to move on the rollers 102 when rotating.

[0057] Specifically, the connection method between the roller driving part 103 and the furnace body 100 is the existing technology, for example, the roller on the roller driving part 103 is rotatably connected to the shell 104 through a bearing, a first bevel gear is provided on the rotating shaft of the roller, and a second bevel gear is provided on the roller driving part 103, the first bevel gear and the second bevel gear are meshed, and a roller motor is also fixedly connected to the roller driving part 103, the roller motor drives the second bevel gear to rotate through the bevel gear structure, thereby driving the first bevel gear to rotate, and then drives the roller to rotate to drive the roller 102 to rotate, and the meshing of the first bevel gear and the second bevel gear can fit the arc surface of the furnace body assembly;

[0058] It should be noted that the diameters of the large end and the small end of the roller 102 are different on different furnace body assemblies. Since the curvatures of the furnace body assemblies are different, in order to make the roller 102 and the curvature of the furnace body assembly better match, the roller 102 on each furnace body assembly has different large ends and small ends, so that the roller 102 can smoothly drive the blank to move;

[0059] As a preferred implementation in this embodiment, Figure 4 As shown, the combustion assembly 200 includes:

[0060] A burner 210 disposed in the furnace body 100 , the burner 210 being connected to a natural gas supply device, and the burner 210 being provided with a gas nozzle 211 inside the insulation layer 101 ;

[0061] A premixing device, the premixing device is connected to the burner 210, the premixing device premixes the fuel gas and the combustion-supporting gas in a semi-premixing manner and passes the premixed fuel gas into the burner 210;

[0062] A secondary air supply component 220, wherein the secondary air supply component 220 is provided with a combustion-supporting nozzle 221 inside the thermal insulation layer 101;

[0063] An ignition assembly provided on the secondary gas supply assembly 220, used to ignite the gas;

[0064] Specifically, in this embodiment, the burner 210 passes through the insulation layer 101 and the shell 104 and is fixed to the shell 104, the gas nozzle 211 is a gas nozzle in the prior art, the premixing device is a prior art, and is used for semi-premixing of natural gas and combustion-supporting gas (such as oxygen, air, etc.), the ignition component is an electronic ignition component, and the ignition component is provided with an ignition head at the gas nozzle 211, and the ignition component generates an electric spark at the gas nozzle 211 after being energized, thereby igniting the gas, and the semi-premixed gas and the combustion-supporting gas are ejected from the gas nozzle 211 and ignited to form a flame to heat the air in the combustion zone, and at the same time, the carbon monoxide and nitrogen monoxide generated by the incomplete combustion of the semi-premixed gas escape to the combustion zone with the flame, and the secondary gas supply component 220 ejects the combustion-supporting gas, and the carbon monoxide and nitrogen monoxide are burned again under the action of the combustion-supporting gas, so that the combustion zone is filled with flames, so that the heating in the combustion zone is more uniform, the green body is heated more uniformly, and the quality of roasting is improved;

[0065] It should be noted that the combustion-supporting nozzle 221 is arranged at a position close to the blank, and the gas nozzle 211 is arranged at a position far from the blank, so that carbon monoxide and nitrogen monoxide are sprayed to the blank following the flame, and the combustion-supporting nozzle 221 delivers the combustion-supporting gas to the blank;

[0066] The secondary air supply component 220 is a high temperature resistant tube, such as a ceramic tube, and the combustion-supporting nozzle 221 is a high temperature resistant nozzle, such as a ceramic nozzle;

[0067] As a preferred implementation in this embodiment, Figure 4 and Figure 5 As shown, the gas nozzle 211 is a square nozzle, and the gas nozzle 211 is tiltedly arranged in the thermal insulation layer 101, so that the gas nozzle 211 sprays an inclined flame, so that the flame can have a larger contact area when sprayed onto the blank.

[0068] In this embodiment, if Figure 1As shown, the ventilation assembly 300 includes a main gas pipe 310 and a gas branch pipe 320, the main gas pipe 310 is arc-shaped, the main gas pipe 310 is connected to the gas branch pipe 320, the gas branch pipe 320 is connected to the furnace body assembly, the ventilation assembly 300 of the combustion zone is connected to the part of the preheating zone close to the combustion zone, and the ventilation assembly 300 of the cooling zone is connected to the part of the preheating zone away from the combustion zone, so that the blank is gradually heated when entering the combustion zone from the preheating zone;

[0069] As a preferred implementation in this embodiment, Figure 6 As shown, the ventilation component 300 also includes:

[0070] A cold air driving unit 340 is provided in the combustion zone, the cold air driving unit 340 is communicated with the main air pipe 310, the cold air driving unit 340 comprises an air inlet chamber 341, active blades 342, driven blades 343 and a hot air pipe 344, the hot air pipe 344 is communicated with the combustion zone, the main air pipe 310 is provided on the side of the hot air pipe 344 and is communicated therewith, the air inlet chamber 341 is fixedly connected to the end of the hot air pipe 344, the active blades 342 are rotatably connected to the hot air pipe 344, the driven blades 343 are rotatably connected to the air inlet chamber 341, the end of the hot air pipe 344 is blocked by a partition in the air inlet chamber 341, the partition is located between the driven blades 343 and the active blades 342, the active blades 342 are driven by the hot air to rotate and drive the driven blades 343 to rotate;

[0071] A cold air pipe 330 is provided on the air inlet cavity 341, the cold air pipe 330 is connected to the cooling zone, and when the driven fan blade 343 rotates, it draws outside air and drives it into the cold air pipe 330;

[0072] In this embodiment, the hot air pipe 344 is a cylinder with openings at both ends. The hot air pipe 344 is fixedly connected to the top of the furnace body assembly in the combustion zone. The air inlet cavity 341 is a cylinder with an opening at one end. The end of the air inlet cavity 341 without an opening is fixed to the end of the hot air pipe 344 away from the furnace body 100. The main air pipe 310 is fixed to the hot air pipe 344 and communicates with the hot air pipe 344. The driven fan blades 343 and the active fan blades 342 are connected by The cold air pipe 330 is connected to the air inlet cavity 341 and communicates with the air inlet cavity 341. When hot air enters the hot air pipe 344 from the combustion zone, the hot air drives the active blades 342 to rotate. When the active blades 342 rotate, the driven blades 343 are driven to rotate. When the driven blades 343 rotate, the air is driven to enter the air inlet cavity 341. The air entering the air inlet cavity 341 enters the cooling zone through the cold air pipe 330, thereby accelerating the cooling of the blank.

[0073] The air inlet cavity 341 , the active fan blades 342 , the driven fan blades 343 , and the hot air pipe 344 are all made of high temperature resistant materials.

[0074] Preferably, an air intake device is further provided at the outlet of the cooling zone, and the air intake device introduces normal temperature air into the cooling zone to cool the blank. The air intake device is a prior art device, and the pipeline arrangement of the air intake device is a prior art device.

[0075] Preferably, the length of the second furnace track 120 is greater than that of the first furnace track 110, so that the preheating zone is completely connected to the high-temperature part in the cooling zone. At the same time, the outlets of the preheating zone and the cooling zone are not in the same position, thereby facilitating loading and unloading.

[0076] In some examples, the kiln further includes an exhaust gas purification device, which is disposed at the mouth of the preheating zone and the cooling zone and is used to absorb exhaust gas in the kiln, and the exhaust gas purification device is a prior art.

[0077] In some examples, the kiln further includes a control unit for controlling the temperature of the combustion zone and the rotation speed of the roller 102, and the control unit is known in the art.

[0078] As a preferred implementation in this embodiment, Figure 7 and Figure 8 As shown, the kiln also includes:

[0079] The trolley 400 includes a carrying platform 410 and a plurality of steering rollers 420. The carrying platform 410 is annular. The steering rollers 420 are rotatably connected to the outer side of the carrying platform 410. The trolley 400 is used to carry the blank and make it flow on the roller conveyor assembly.

[0080] The trolley 400 is made of high temperature resistant material, and the material of the trolley 400 is the same as the material of the loading tray in the prior art;

[0081] Preferably, the surface of the carrying platform 410 is uniformly provided with a plurality of air holes 411 penetrating the carrying platform 410 for circulation of hot air, and at the same time, the carbon monoxide and nitric oxide released therefrom can spread to the bottom of the blank;

[0082] Preferably, a support bracket 430 is also provided at the bottom of the carrying platform 410. The support bracket 430 is used to support the carrying platform 410 and facilitate the positioning of the trolley. The support bracket 430 is a regular polygon composed of square steel. When unloading, the carrying platform 410 is hoisted onto the circulation trolley through a hoisting mechanism. The support bracket 430 is clamped on the circulation trolley to prevent the carrying platform 410 from shaking during circulation.

[0083] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0084] It should be understood that although the terms first, second, third, etc. may be used in the present invention to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0085] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foamed ceramic insulation board kiln, characterized in that: The kiln comprises: A furnace body, the furnace body comprising a first furnace channel and a second furnace channel in a vortex shape, the first furnace channel and the second furnace channel are connected to each other, the center positions of the first furnace channel and the second furnace channel are connected, a roller conveying assembly and a combustion assembly are arranged in the furnace body, a section of the first furnace channel and the second furnace channel near the center is set as a combustion zone, a section of the first furnace channel near the periphery is set as a cooling zone, and a section of the second furnace channel near the periphery is set as a preheating zone; A ventilation assembly is arranged on the furnace body, and the ventilation assembly introduces hot air from the combustion zone and the cooling zone into the preheating zone, wherein the ventilation assembly includes a main air pipe and a branch air pipe, the main air pipe is arc-shaped, the main air pipe is connected to the branch air pipe, the branch air pipe is connected to the furnace body assembly, the ventilation assembly of the combustion zone is connected to the part of the preheating zone close to the combustion zone, and the ventilation assembly of the cooling zone is connected to the part of the preheating zone far from the combustion zone; The ventilation component also includes: A cold air driving unit is arranged in the combustion zone, the cold air driving unit is communicated with the main air pipe, the cold air driving unit comprises an air inlet cavity, an active fan blade, a driven fan blade and a hot air pipe, the hot air pipe is communicated with the combustion zone, the main air pipe is arranged on the side of the hot air pipe and is communicated with it, the air inlet cavity is fixedly connected to the end of the hot air pipe, the active fan blade is rotatably connected to the hot air pipe, the driven fan blade is rotatably connected to the air inlet cavity, the end of the hot air pipe is blocked by a partition in the air inlet cavity, the partition is located between the driven fan blade and the active fan blade, the active fan blade rotates under the drive of the hot air and drives the driven fan blade to rotate; A cold air pipe is arranged on the air inlet cavity, the cold air pipe is communicated with the cooling zone, and when the driven fan blade rotates, it draws outside air and drives it into the cold air pipe.

2. The foamed ceramic insulation board kiln according to claim 1, characterized in that: The first furnace channel and the second furnace channel are both composed of arc-shaped furnace body components connected end to end, each furnace body component has the same structure and different curvatures, and the ends of the first furnace channel and the second furnace channel located in the center are connected by a U-shaped furnace body component.

3. The foamed ceramic insulation board kiln according to claim 1, characterized in that: The roller conveyor assembly comprises: A plurality of rollers rotatably connected to the furnace body, wherein the rollers are in the shape of a cone with one end being larger than the other end, and the larger end of the rollers is located on the outer furnace wall; A roller driving part fixedly connected to the furnace body is used to drive the roller to rotate.

4. The foamed ceramic insulation board kiln according to claim 1, characterized in that: The combustion assembly comprises: A burner disposed in the furnace body, the burner being connected to a natural gas supply device, and the burner being provided with a gas nozzle in the furnace; A premixing device, the premixing device is connected to the burner nozzle, the premixing device premixes the fuel gas and the combustion-supporting gas in a semi-premixing manner and passes the premixed fuel gas into the burner nozzle; A secondary gas supply component, wherein the secondary gas supply component is provided with a combustion-supporting nozzle in the furnace, the combustion-supporting nozzle is arranged at a position close to the blank, and the gas nozzle is arranged at a position far from the blank; The ignition assembly arranged on the secondary gas supply assembly is used to ignite the gas.

5. The foamed ceramic insulation board kiln according to claim 4, characterized in that: The gas nozzle is a square nozzle, and the gas nozzle is arranged obliquely in the heat-insulating layer, so that the gas nozzle sprays an inclined flame.

6. The foamed ceramic insulation board kiln according to any one of claims 1 to 5, characterized in that: The length of the second furnace channel is greater than that of the first furnace channel, the preheating zone is completely connected to the high-temperature part of the cooling zone, and the outlets of the preheating zone and the cooling zone are not located at the same position.

7. The foamed ceramic insulation board kiln according to any one of claims 1 to 5, characterized in that: The kiln also includes: The trolley comprises a bearing platform and a plurality of steering rollers, the bearing platform is annular, the steering rollers are rotatably connected to the outside of the bearing platform, and the trolley is used for bearing the blank.

8. The foamed ceramic insulation board kiln according to claim 7, characterized in that: The surface of the carrying platform is uniformly provided with a plurality of air holes penetrating the carrying platform; A supporting bracket is also provided at the bottom of the bearing platform. The supporting bracket is used to support the bearing platform and is a regular polygon.

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