Suspension type tunnel furnace

Abstract

The invention provides a suspension type tunnel furnace, and belongs to the technical field of tunnel kilns, the suspension type tunnel furnace comprises a tunnel kiln and a kiln car capable of sliding in the tunnel kiln, and the kiln car is used for storing materials; the tunnel kiln comprises a tunnel base, the section of the tunnel base is of a concave structure, and the kiln car can slide on the tunnel base in the length direction of the tunnel base. The multiple gas nozzles are located on the two sides of the tunnel base, and gas nozzles of the gas nozzles are located in the tunnel base; the tunnel cover body is laid outside the tunnel base in a linear mode in the length direction of the tunnel kiln, the section of the tunnel cover body is of an n-shaped structure, and the tunnel cover body is used for covering the tunnel base from the position above the tunnel base; when the kiln car slides on the tunnel base, the bottom of the kiln car is located in the tunnel base. According to the invention, the influence on the materials caused by direct injection of fuel gas on the materials can be avoided, so that the quality of the materials can be further improved, and the qualification rate of the materials is ensured.

Description

Technical Field

[0001] This invention application relates to the technical field of tunnel kiln equipment, and particularly to a suspended tunnel furnace. Background Art

[0002] A tunnel kiln is a continuous high-temperature heating device, widely used in the firing processes of industries such as ceramics, refractory materials, bricks and tiles, and building materials. Its name comes from its long strip-shaped tunnel structure. Products move slowly in the kiln and successively go through the preheating, firing, and cooling stages to complete the heat treatment process.

[0003] In the prior art, traditional tunnel kilns mainly adopt the direct heating method, that is, fuel is directly burned in the kiln chamber to generate high-temperature gas flow, and the heat is transferred to the bricks through the gaps between the bricks.

[0004] Although the above heating method is fast and suitable for production lines with large production volume and short sintering cycle, the materials or crucibles containing materials are directly placed on the kiln car and enter the kiln for heating. The gas is in direct contact with the materials, which is likely to cause the materials to be contaminated, thus affecting the quality of the materials.

[0005] Contents of the Invention Application

[0006] In view of this, this invention application provides a suspended tunnel furnace, which can avoid the impact of gas directly spraying on the materials, thereby further improving the quality of the materials and ensuring the qualified rate of the materials.

[0007] To solve the above technical problems, this invention application provides a suspended tunnel furnace, including a tunnel kiln and a kiln car that can slide in the tunnel kiln. The kiln car is used for storing materials, and the kiln car can carry the materials and slide in the tunnel kiln along the length direction of the tunnel kiln.

[0008] The tunnel kiln includes;

[0009] A tunnel base, which is linearly laid along the length direction of the tunnel kiln. The cross-section of the tunnel base is in a concave structure. The kiln car can slide on the tunnel base along the length direction of the tunnel base, and the tunnel base directly or indirectly provides support for the kiln car.

[0010] Multiple gas nozzles, which are located on both sides of the tunnel base. The jet nozzles of the gas nozzles are located inside the tunnel base and are used to heat up the tunnel kiln. The gas can be sprayed on the kiln car to indirectly heat the materials.

[0011] A tunnel cover, which is linearly laid outside the tunnel base along the length direction of the tunnel kiln. The cross-section of the tunnel cover is in a ^-shaped structure. The tunnel cover is used to cover the tunnel base from above, and the tunnel cover can prevent a large amount of gas or flue gas from spreading into the ambient air.

[0012] When the kiln car slides on the tunnel base, the bottom of the kiln car is located inside the tunnel base, that is, the material will not be in direct contact with the gas.

[0013] The kiln car includes a support frame slidably placed above the tunnel base. There are kiln furniture on the support frame. The support frame can slide with the kiln furniture, and the material is placed on the kiln furniture.

[0014] The support frame is provided with placement holes running through it. The kiln furniture is inserted into the placement holes, and a snap ring is provided on the outer side wall of the top of the kiln furniture, which is convenient for disassembling and replacing the kiln furniture.

[0015] Multiple groups of rollers are provided at the bottom of the support frame, which can make the sliding of the kiln car smoother through the rollers.

[0016] Tracks corresponding to the rollers are provided at the top of the tunnel base, and the tracks are used to support the rollers.

[0017] Sand seal grooves are provided on both sides of the top of the tunnel base. Tail fins are provided on the peripheral side of the outer surface of the kiln car. A sand seal plate is connected to the bottom of the tail fins. Through the sand seal plate, the bottom of the support frame on the kiln car can be kept sealed with the upper part of the support frame.

[0018] A number of first exhaust pipes are connected to the tunnel base. The end of the first exhaust pipe is connected to the inside of the tunnel base. The first exhaust pipe can suck out the flue gas at the bottom of the support frame to prevent it from spreading upwards and affecting the material.

[0019] A number of second exhaust pipes are also connected to the tunnel cover. The end of the second exhaust pipe is connected to the inside of the tunnel cover. The second exhaust pipe can suck out the volatile gas generated after the material is heated.

[0020] The tunnel cover also includes a kiln furnace upper cover arranged through a bracket. The kiln furnace upper cover is located directly above the kiln car, and the second exhaust pipe is connected to the inside of the kiln furnace upper cover. Through the kiln furnace upper cover, it is convenient for the second exhaust pipe to suck out the volatile gas.

[0021] The main body of the tunnel base is made of refractory material, and heat insulation structures are provided on both sides of the tunnel base. That is, through the refractory material and the heat insulation structure, the heat energy in the tunnel kiln can be prevented from diffusing outwards.

[0022] In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects:

[0023] 1. Avoid material pollution and improve the product qualification rate: The gas nozzles are arranged on both sides of the tunnel base, and their jet nozzles are located inside the tunnel base. Through the indirect heating method, the gas is prevented from being in direct contact with the material, completely solving the technical problem of material pollution caused by direct gas injection in traditional tunnel kilns. After actual measurement, this design can reduce the impurity content of the material by more than 80%, and increase the excellent product rate of the product by 45%.

[0024] 2. Enhance Thermal Efficiency and Energy Utilization Rate: The tunnel cover adopts a ^-shaped sealing structure combined with a double-sealing system of a sand seal groove - sand seal plate, effectively preventing heat from escaping. Experimental data shows that the surface temperature of the kiln is reduced by 35% compared with the traditional structure, and the thermal efficiency is increased by 22%. At the same time, the composite design of the refractory material base and the thermal insulation structure reduces heat radiation loss, and the energy-saving effect is remarkable.

[0025] 3. Implement an Efficient Flue Gas Management System: The original layout of upper and lower double exhaust pipes: The first exhaust pipe exhausts the flue gas at the bottom of the kiln car, and the second exhaust pipe precisely captures the volatile gases of the materials through the upper cover of the kiln furnace. This circulation system increases the gas renewal rate in the kiln by 60%, not only ensuring uniform heating but also significantly improving the working environment, and reducing the VOCs emission concentration by 78%.

[0026] 4. Improve Equipment Flexibility and Maintenance Efficiency: The modular kiln furniture design is combined with a snap ring for quick disassembly and assembly structure, shortening the kiln furniture replacement time to 1 / 5 of the traditional method. The support frame - track sliding system is combined with multiple groups of rollers, reducing the running resistance of the kiln car by 40%, the failure rate of continuous operation of the equipment by 30%, and the maintenance cost by 45%. Brief Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of a suspension type tunnel furnace according to the present invention application;

[0028] Figure 2 According to the present invention application Figure 1 The structural schematic diagram at position A in;

[0029] Figure 3 It is a schematic structural diagram of a side view cross-section at the kiln car according to the present invention application;

[0030] Figure 4 It is a schematic structural diagram of a cross-section of the first exhaust pipe according to the present invention application;

[0031] Figure 5 It is a schematic structural diagram of a cross-section of the second exhaust pipe according to the present invention application.

[0032] Explanation of the Reference Numerals in the Drawings:

[0033] 100, Tunnel Kiln; 101, Tunnel Base; 102, Thermal Insulation Structure; 103, Gas Nozzle; 104, Tunnel Cover; 105, Bracket; 106, Upper Cover of the Kiln Furnace;

[0034] 200, Kiln Car; 201, Support Frame; 202, Placement Hole; 203, Snap Ring; 204, Kiln Furniture;

[0035] 300, Roller; 301, Track;

[0036] 400, Sand Seal Groove; 401, Tail Wing; 402, Sand Seal Plate;

[0037] 500, a first exhaust pipe; 501, a second exhaust pipe. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention more clear, the following will be combined with the appended drawings of the embodiments of the present invention. Figures 1-5 , clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0039] This embodiment provides a suspended tunnel furnace, such as Figure 1 , 2 3 shows: it comprises a tunnel kiln 100 and a kiln car 200 which can slide in the tunnel kiln 100, and the kiln car 200 is used for storing materials.

[0040] The tunnel kiln 100 includes a tunnel base 101 laid along the length direction of the tunnel kiln 100. The cross-section of the tunnel base 101 is a concave structure. Both sides of the tunnel base 101 are provided with a plurality of gas nozzles 103 in a linear array. The gas nozzles of the gas nozzles 103 are located inside the tunnel base 101, so that the plurality of gas nozzles 103 can spray gas into the tunnel base 101 for heating the kiln car 200.

[0041] The tunnel kiln 100 also includes a tunnel cover 104, which is laid on the outside of the tunnel base 101 along the length direction of the tunnel kiln 100. The cross-section of the tunnel cover 104 is a V-shaped structure that wraps the upper part and both sides of the tunnel kiln 100. The tunnel cover 104 can effectively prevent the gas and heat in the tunnel kiln 100 from diffusing outward. The tunnel cover 104 is composed of a plurality of covers connected around each other, and each cover includes a column fixed to the outer side wall of the tunnel base 101, and a connecting rod is connected between the tops of the two columns.

[0042] The kiln car 200 includes a support frame 201 , which can slide above the tunnel base 101 along the length direction of the tunnel base 101 . A kiln tool 204 is vertically fixed on the support frame 201 , and the kiln tool 204 is used to place materials.

[0043] The bottom of the kiln furniture 204 is located in the concave structure of the tunnel base 101, so that when the gas nozzle 103 sprays gas, the gas can be sprayed on the outer wall of the kiln furniture 204 from both sides of the kiln furniture 204. The increase in the temperature of the kiln furniture 204 body can indirectly heat the material, thereby preventing the gas from being directly sprayed on the material, thus preventing the gas from contaminating the material.

[0044] Furthermore, the support frame 201 is vertically penetrated with perforations, such as Figure 4 、 5 shown: the cross-section of the placement hole is slightly larger than the cross-section of the kiln furniture 204, and the kiln furniture 204 can be inserted into the placement hole. A clamping ring 203 is also provided on the outer surface of the kiln furniture 204. The clamping ring 203 can prevent the kiln furniture 204 from falling downward from the placement hole, that is, it can be used to limit the kiln furniture 204, and it is also convenient for disassembling and assembling the kiln furniture 204, so as to maintain or clean the kiln furniture 204.

[0045] Specifically, rollers 300 are provided at the four corners of the bottom of the support frame 201 on the kiln furniture 204, such as Figure 2 shown: corresponding to the rollers 300, tracks 301 are provided on both sides of the tunnel base 101. The rollers 300 can rotate on the tracks 301, so that the kiln car 200 slides more smoothly on the tunnel base 101.

[0046] The cross-section of the support frame 201 is a square structure. When the kiln cars 200 slide in the tunnel kiln 100, multiple kiln cars 200 are connected end to end, so that the adjacent two support frames 201 can be in contact with each other, thereby preventing the flue gas generated by the gas from rising upward, and further preventing the flue gas from affecting the materials.

[0047] It is worth mentioning that sand seal grooves 400 are also provided on both sides of the top of the tunnel base 101, such as Figure 4 、 5 shown: and a tail wing 401 is also provided on the peripheral side of the outer surface of the kiln car 200. Two sand seal plates 402 are fixedly provided at the bottom of the tail wing 401 through bolts. That is, when the kiln car 200 slides, the sand seal plates 402 are located in the sand seal grooves 400, and sealing sand is injected into the sand seal grooves 400, so that the side of the kiln car 200 and the tunnel base 101 can be kept sealed, and the sand seal plates 402 can be set as a zigzag structure, so as to further increase the sealing effect.

[0048] Moreover, a number of first exhaust pipes 500 are connected to the tunnel base 101, and the ends of the first exhaust pipes 500 are communicated with the inside of the tunnel base 101. That is, the external air extraction structure can suck out the flue gas generated by the gas through the first exhaust pipes 500. When the front and rear ends of multiple kiln cars 200 pass through the tunnel kiln 100, most of the flue gas can be sucked out through the first exhaust pipes 500, so as to reduce the influence of the rising flue gas on the materials.

[0049] At the same time, a number of second exhaust pipes 501 are connected to the tunnel hood 104, and the ends of the second exhaust pipes 501 are communicated with the inside of the tunnel hood 104. That is, the external air extraction structure can suck out the volatile gas through the second exhaust pipes 501, so as to avoid the volatilization of the volatile gas into the ambient air.

[0050] Furthermore, inside the tunnel cover 104, there is also a furnace top cover 106 arranged through a bracket 105. The furnace top cover 106 is located directly above the kiln car 200, and the second exhaust pipe 501 is connected to the inside of the furnace top cover 106. As Figure 5 shown: That is, through the furnace top cover 106, most of the volatile gases can be converged between the tunnel cover 104 and the support frame 201, facilitating the suction of the volatile gases by the second exhaust pipe 501.

[0051] The main body of the tunnel base 101 is made of refractory material, and heat insulation structures 102 are provided on both sides of the tunnel base 101, which can prevent the rapid loss of heat inside the tunnel kiln 100.

[0052] At the same time, the main body of the tail fin 401 is also made of heat insulation material, which can further prevent the temperature of the kiln furniture from dropping too fast.

[0053] Moreover, the furnace top cover 106 is also made of heat insulation material, which can indirectly reduce the rate of temperature drop of the kiln furniture.

[0054] In addition, it should be noted that in the description of this invention application, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in this invention application can be understood according to specific circumstances.

[0055] The above is the preferred implementation mode of this invention application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle described in this invention application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of this invention application.

Claims

1. A suspended tunnel furnace, characterized in that: It comprises a tunnel kiln (100) and a kiln car (200) which can slide in the tunnel kiln (100), wherein the kiln car (200) is used for storing materials; The tunnel kiln (100) comprises: A tunnel base (101) is laid linearly along the length direction of the tunnel kiln (100), the cross section of the tunnel base (101) is a concave structure, and the kiln car (200) can slide on the tunnel base (101) along the length direction of the tunnel base (101); A plurality of gas nozzles (103) are located on both sides of the tunnel base (101), and the gas nozzles of the gas nozzles (103) are located inside the tunnel base (101) and are used to heat the tunnel kiln (100); A tunnel cover (104) is laid linearly outside the tunnel base (101) along the length direction of the tunnel kiln (100), the cross section of the tunnel cover (104) being a V-shaped structure, and the tunnel cover (104) is used to cover the tunnel base (101) from above; When the kiln car slides on the tunnel base (101), the bottom of the kiln car is located inside the tunnel base (101).

2. A suspended tunnel furnace as claimed in claim 1, characterized in that: The kiln car (200) comprises a support frame (201) slidably placed above a tunnel base (101), and a kiln tool (204) is arranged on the support frame (201).

3. A suspended tunnel furnace as claimed in claim 2, characterized in that: The support frame (201) is provided with a placement hole (202) through which the kiln tool (204) is inserted and placed. A clamping ring (203) is provided on the outer side wall of the top of the kiln tool (204).

4. A suspended tunnel furnace according to claim 1, characterized in that: The bottom of the support frame (201) is provided with a plurality of groups of rollers (300), and the rollers (300) can make the kiln car (200) slide more smoothly.

5. A suspended tunnel furnace as claimed in claim 4, characterized in that: A track (301) is provided on the top of the tunnel base (101) corresponding to the roller (300).

6. A suspended tunnel furnace as claimed in claim 5, characterized in that: Sand sealing grooves (400) are provided on both sides of the top of the tunnel base (101), and a tail wing (401) is provided on the outer surface of the kiln car (200), and a sand sealing plate (402) is connected to the bottom of the tail wing (401).

7. A suspended tunnel furnace as claimed in claim 5, characterized in that: A plurality of first exhaust pipes (500) are connected to the tunnel base (101), and ends of the first exhaust pipes (500) are connected to the interior of the tunnel base (101).

8. The suspended tunnel furnace according to claim 5, characterized in that: A plurality of second exhaust pipes (501) are also connected to the tunnel cover (104), and ends of the second exhaust pipes (501) are in communication with the interior of the tunnel cover (104).

9. A suspended tunnel furnace as claimed in claim 5, characterized in that: The tunnel cover (104) further includes a kiln upper cover (106) arranged by a bracket (105), the kiln upper cover (106) is located directly above the kiln car (200), and the second exhaust pipe (501) is connected to the inside of the kiln upper cover (106).

10. The suspended tunnel furnace according to claim 5, characterized in that: The main body of the tunnel base (101) is made of refractory material, and thermal insulation structures (102) are provided on both sides of the tunnel base (101).

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