A shuttle kiln

Abstract

This utility model discloses a shuttle kiln. In the shuttle kiln of this application, when the kiln car is located outside the combustion chamber, the kiln car is in the loading and unloading state. At this time, the operator can normally load the product into the kiln car, and then the operator can move the kiln car into the combustion chamber so that the kiln car is in working condition. During the combustion process in the combustion chamber, a large amount of exhaust gas is generated in the kiln car. Since the lower cavity wall of the combustion chamber is provided with a flue gas outlet, and the bottom of the kiln car is provided with a flue gas outlet, when the kiln car is in working condition, the flue gas outlet is directly opposite the flue gas outlet. When the smoke extraction module is working, the exhaust gas in the kiln car can enter the flue gas outlet through the flue gas outlet under the suction of the smoke extraction module and be discharged to the outside. Since the exhaust gas in the combustion chamber enters the flue gas outlet from top to bottom, the exhaust gas can carry heat to the bottom of the combustion chamber during the movement process, thereby reducing the temperature difference between the upper and lower ends of the combustion chamber, and thus improving the temperature uniformity of the entire combustion chamber.

Description

Technical Field

[0001] This utility model relates to the field of industrial kiln technology, and in particular to a shuttle kiln. Background Technology

[0002] Industrial kilns are constructed of refractory materials and are used to calcine materials or fire finished products. They can be used to fire non-machined products such as ceramics, metals, and glass. Shuttle kilns are an important type of industrial kiln. Also known as periodic or intermittent kilns, they are characterized by intermittent production on a weekly basis, with the kiln temperature varying within each heating cycle. Chamber kilns, bogie kilns, and pit kilns are typical examples of shuttle kilns.

[0003] When the shuttle kiln is in operation, a large amount of waste gas is generated in its internal combustion chamber. The waste gas itself is at a high temperature, which causes it to accumulate at the top of the combustion chamber. As a result, the temperature is higher closer to the top of the combustion chamber, and the temperature uniformity of the entire combustion chamber is poor, which affects the firing quality of the product. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art. This invention provides a shuttle kiln with a more uniform temperature inside the combustion chamber.

[0005] The shuttle kiln provided according to the embodiment of this utility model includes a kiln body, a kiln car, and a smoke extraction module; the kiln body is provided with a combustion chamber, and the lower wall of the combustion chamber is provided with a smoke exhaust port; the bottom of the kiln car is provided with a smoke outlet, and the kiln car has a working state located inside the combustion chamber and a loading and unloading state located outside the combustion chamber. When the kiln car is in the working state, the smoke outlet is directly opposite the smoke exhaust port; the smoke extraction module is provided on the kiln body, and the inlet of the smoke extraction module is connected to the smoke exhaust port. The smoke extraction module is used to discharge the exhaust gas discharged from the smoke outlet to the outside of the combustion chamber.

[0006] The shuttle kiln described in this utility model has at least the following beneficial effects: In the shuttle kiln of this application, when the kiln car is located outside the combustion chamber, the kiln car is in the loading and unloading state. At this time, the workers can normally load the product into the kiln car, and then the workers can move the kiln car into the combustion chamber so that the kiln car is in working condition. During the combustion process in the combustion chamber, a large amount of exhaust gas is generated in the kiln car. Since the lower wall of the combustion chamber is provided with a flue gas outlet, and the bottom of the kiln car is provided with a flue gas outlet, when the kiln car is in working condition, the flue gas outlet is directly opposite the flue gas outlet. When the smoke extraction module is working, the exhaust gas in the kiln car can enter the flue gas outlet through the flue gas outlet under the suction of the smoke extraction module and be discharged to the outside. Since the exhaust gas in the combustion chamber enters the flue gas outlet from top to bottom, the exhaust gas can carry heat to the bottom of the combustion chamber during the movement process, thereby reducing the temperature difference between the upper and lower ends of the combustion chamber, and thus improving the temperature uniformity of the entire combustion chamber.

[0007] According to the shuttle kiln described in this embodiment of the present invention, the lower cavity wall of the combustion chamber is provided with a strip groove extending along a preset horizontal direction, and the strip groove has a preset groove opening facing upward; a plurality of cover plates are provided at the preset groove opening and spaced apart along the preset horizontal direction, and a smoke exhaust port is formed between any two adjacent cover plates, and the inlet of the smoke extraction module is connected to the strip groove.

[0008] According to the shuttle kiln described in this embodiment of the utility model, multiple kiln cars are provided, and multiple exhaust ports are provided on the lower cavity wall of the combustion chamber corresponding to the kiln cars.

[0009] According to the shuttle kiln described in this embodiment of the utility model, the cover plate can be adjusted in a preset horizontal position.

[0010] According to the shuttle kiln described in this embodiment of the utility model, multiple strip grooves are arranged side by side, and the bottom of the kiln car is provided with multiple smoke outlets corresponding to the strip grooves.

[0011] The shuttle kiln according to the embodiment of this utility model further includes a gas supply module and a heat exchange module. The gas supply module is used to supply gas to the combustion chamber. The heat exchange module is connected to the smoke extraction module and the gas supply module respectively. The heat exchange module is used to exchange the heat of the exhaust gas in the smoke extraction module to the gas in the gas supply module.

[0012] According to the shuttle kiln described in this embodiment of the utility model, the smoke extraction module includes an exhaust chimney and an exhaust fan. The heat exchange module is provided with a heat medium channel, which is connected to the exhaust chimney and the exhaust port respectively. The exhaust fan is installed on the exhaust chimney and is used to extract the waste gas in the exhaust chimney into the outside.

[0013] According to the shuttle kiln described in this embodiment of the utility model, the kiln body is also provided with a flue gas passage. The two ends of the flue gas passage are respectively connected to the flue gas outlet and the heat medium passage. A cold air inlet connected to the outside is opened on the passage wall of the flue gas passage.

[0014] According to the shuttle kiln described in this embodiment of the utility model, the gas supply module includes a combustion-supporting blower, a first branch pipe, and a first switching valve. The heat exchange module is provided with a refrigerant channel. The two ends of the refrigerant channel are respectively connected to the outlet of the combustion-supporting blower and one end of the first branch pipe. The other end of the first branch pipe is connected to the combustion chamber. The first switching valve is provided on the first branch pipe and is used to control the on / off state of the first branch pipe.

[0015] According to the shuttle kiln described in this embodiment of the utility model, the gas supply module further includes a second branch pipe and a second switching valve. The two ends of the second branch pipe are respectively connected to the outlet of the combustion-supporting blower and the combustion chamber. The second switching valve is located on the second branch pipe and is used to control the on / off state of the first branch pipe.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the structure of a shuttle kiln according to an embodiment of the present invention; Figure 2 for Figure 1 A magnified view of the structure at point A of the shuttle kiln shown; Figure 3 for Figure 1 The image shows a top view of the shuttle kiln.

[0018] Figure label: Kiln body 100; combustion chamber 110; strip groove 111; flue gas outlet 111a; cover plate 120; flue gas passage 130; cold air inlet 131; 200 kiln cars; Smoke extraction module 300; Exhaust chimney 310; Smoke exhaust fan 320; Gas supply module 400; combustion-supporting blower 410; first branch pipe 420; first switching valve 430; second branch pipe 440; second switching valve 450; Heat exchange module 500. Detailed Implementation

[0019] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] The following is for reference. Figures 1 to 3 The shuttle kiln described in this application is described in detail.

[0024] refer to Figure 1 and Figure 2 According to an embodiment of the present invention, a shuttle kiln includes a kiln body 100, a kiln car 200, and a smoke extraction module 300. The kiln body 100 is provided with a combustion chamber 110, and a smoke exhaust port 111a is provided on the lower wall of the combustion chamber 110. The bottom of the kiln car 200 is provided with a smoke outlet. The kiln car 200 has a working state located inside the combustion chamber 110 and a loading / unloading state located outside the combustion chamber 110. When the kiln car 200 is in the working state, the smoke outlet is directly opposite the smoke exhaust port 111a. The smoke extraction module 300 is provided on the kiln body 100, and the inlet of the smoke extraction module 300 is connected to the smoke exhaust port 111a. The smoke extraction module 300 is used to discharge the exhaust gas discharged from the smoke outlet to the outside of the combustion chamber 110.

[0025] When the shuttle kiln of this application is in operation, when the kiln car 200 is located outside the combustion chamber 110, the kiln car 200 is in the loading and unloading state, and the workers can load and unload the kiln car 200 normally. When the kiln car 200 is located inside the combustion chamber 110, the kiln car 200 is in the working state. The high temperature environment inside the combustion chamber 110 can realize the processing of the workpiece inside the kiln car 200. At the same time, the combustion inside the combustion chamber 110 will also produce a large amount of exhaust gas. Among them, the exhaust gas inside the kiln car 200 can enter the outside through the smoke outlet and the exhaust port 111a in sequence under the suction force generated by the smoke extraction module 300.

[0026] It is understandable that, since the exhaust port 111a is located on the lower wall of the combustion chamber 110 and the smoke outlet is located at the bottom of the kiln car 200, when the smoke extraction module 300 extracts the exhaust gas from the kiln car 200, the exhaust gas can move from the upper end to the lower end of the combustion chamber 110, and be discharged to the outside through the smoke outlet and exhaust port 111a in sequence. During the process of the exhaust gas moving from the upper end to the lower end of the combustion chamber 110, the exhaust gas can carry the heat in the combustion chamber 110 downward to increase the temperature at the lower end of the combustion chamber 110, thereby reducing the temperature difference between the upper and lower ends of the combustion chamber 110 and improving the temperature uniformity of the entire combustion chamber 110.

[0027] In some embodiments of this utility model, reference is made to Figure 1 and Figure 2 The lower wall of the combustion chamber 110 is provided with a strip groove 111 extending in a preset horizontal direction. The strip groove 111 has a preset opening facing upward. Multiple cover plates 120 are provided at the preset opening, which are spaced apart in a preset horizontal direction. A smoke exhaust port 111a is formed between any two adjacent cover plates 120. The inlet of the smoke extraction module 300 is connected to the strip groove 111.

[0028] It is understood that in this application, the lower cavity wall of the combustion chamber 110 is provided with a strip groove 111 extending in a preset horizontal direction. Multiple cover plates 120 are distributed at preset openings of the strip groove 111 along a preset direction, and a smoke exhaust port 111a is formed between two adjacent cover plates 120. Thus, by placing the cover plates 120 at the preset openings of the strip groove 111, the operator can not only form the smoke exhaust port 111a, but also make the setting of the smoke exhaust port 111a simpler. The setting of the cover plates 120 allows the operator to first process the strip groove 111 at the bottom of the combustion chamber 110, and then set multiple cover plates 120 at the preset openings of the strip groove 111 to form the smoke exhaust port 111a. The setting of the strip groove 111 allows each smoke exhaust port 111a to be connected to each other, so that a single smoke exhaust module can complete the extraction of exhaust gas from multiple smoke exhaust ports 111a.

[0029] In a further embodiment of the present invention, the kiln car 200 is provided with multiple exhaust ports 111a corresponding to the kiln car 200 on the lower cavity wall of the combustion chamber 110.

[0030] For example, such as Figure 1 As shown, there can be two kiln cars 200. Two exhaust ports 111a are formed on the strip groove 111, and the two exhaust ports 111a are respectively opposite to the exhaust ports on the bottom of the two kiln cars 200.

[0031] It is understandable that by setting up multiple kiln cars 200, the shuttle kiln of this application can complete the processing of workpieces within multiple kiln cars 200 at a time, thereby improving the processing efficiency of the shuttle kiln of this application.

[0032] It should be noted that the horizontal position of the flue gas outlet at the bottom of the kiln car 200 varies for different specifications. Accordingly, the horizontal position of the flue gas outlet 111a in the combustion chamber 110 also needs to be changed so that the flue gas outlet can be directly opposite the flue gas outlet 111a when the kiln car 200 is in operation. At the same time, when the number of kiln cars 200 placed in the combustion chamber 110 changes, the position of each kiln car 200 will also change. Therefore, the position of each flue gas outlet 111a at the bottom of the combustion chamber 110 also needs to be changed so that the flue gas outlets can be directly opposite the flue gas outlet 111a.

[0033] Based on the above problems, in some embodiments of this utility model, the cover plate 120 is adjustable in a preset horizontal position.

[0034] Understandably, when the position of the smoke outlet on the kiln car 200 changes, the staff can adjust the position of the cover plate 120 in the preset horizontal direction, thereby adjusting the position of the smoke outlet 111a in the preset horizontal direction, so that the smoke outlet 111a can be directly opposite the smoke outlet.

[0035] In some embodiments of this utility model, multiple strip grooves 111 are arranged side by side, and the bottom of the kiln car 200 is provided with multiple smoke outlets corresponding to the strip grooves 111.

[0036] Understandably, each kiln car 200 has multiple smoke outlets at its bottom, and each smoke outlet on the same kiln car 200 corresponds to a different strip groove 111. The multiple smoke outlets on the kiln car 200 make the exhaust gas discharge efficiency of the kiln car 200 higher.

[0037] In some embodiments of this utility model, reference is made to Figure 3 The shuttle kiln also includes a gas supply module 400 and a heat exchange module 500. The gas supply module 400 is used to supply gas into the combustion chamber 110. The heat exchange module 500 is connected to the smoke extraction module 300 and the gas supply module 400 respectively. The heat exchange module 500 is used to exchange the heat of the exhaust gas in the smoke extraction module 300 to the gas in the gas supply module 400.

[0038] It should be noted that the gas supplied by the gas supply module 400 to the gas chamber is at a lower temperature. This lower temperature gas, when directly input into the gas chamber, will lower the temperature inside the gas chamber. On the other hand, the exhaust gas extracted by the smoke extraction module 300 from the gas chamber is at a higher temperature. This exhaust gas will carry away a large amount of heat from the gas chamber as it is extracted.

[0039] It is understood that in the shuttle kiln of this application, by setting up a heat exchange module 500, the heat exchange module 500 can use the exhaust gas extracted by the smoke extraction module 300 to heat the gas supplied by the gas supply module 400, thereby realizing the utilization of the waste heat of the exhaust gas extracted by the smoke extraction module 300, thereby improving the energy utilization rate of the shuttle kiln of this application and reducing the operating cost of the shuttle kiln of this application.

[0040] In some embodiments of this utility model, reference is made to Figure 1 The smoke extraction module 300 includes an exhaust chimney 310 and an exhaust fan 320. The heat exchange module 500 is provided with a heat medium channel, which is connected to the exhaust chimney 310 and the exhaust port 111a respectively. The exhaust fan 320 is installed on the exhaust chimney 310 and is used to draw the exhaust gas in the exhaust chimney 310 into the outside.

[0041] Understandably, under the action of the exhaust fan, the exhaust gas inside the kiln car 200 enters the heat medium channel of the heat exchange module 500 through the exhaust port and the exhaust port 111a for heat exchange. The exhaust gas after heat exchange is discharged to the outside through the exhaust chimney 310.

[0042] In some embodiments of this utility model, reference is made to Figure 1 The kiln body 100 is also equipped with a flue gas passage 130. The two ends of the flue gas passage 130 are connected to the flue gas outlet 111a and the heat medium passage, respectively. A cold air inlet 131 connected to the outside is opened on the passage wall of the flue gas passage 130.

[0043] It is understandable that by setting up a cold air inlet 131, when the smoke extraction system is working, outside air can enter the smoke extraction channel 130 through the cold air inlet 131, pass through the heat medium channel and the exhaust chimney 310 in sequence, and then enter the outside again. During the circulation of cold air, negative pressure can be generated, thereby better drawing out the exhaust gas in the combustion chamber 110.

[0044] In some embodiments of this utility model, reference is made to Figure 3 The gas supply module 400 includes a combustion-supporting blower 410, a first branch pipe 420, and a first switching valve 430. The heat exchange module 500 is provided with a refrigerant channel. The two ends of the refrigerant channel are respectively connected to the outlet of the combustion-supporting blower 410 and one end of the first branch pipe 420. The other end of the first branch pipe 420 is connected to the combustion chamber 110. The first switching valve 430 is provided on the first branch pipe 420 and is used to control the opening and closing of the first branch pipe 420.

[0045] Understandably, under the action of the combustion-supporting blower 410, the gas enters the refrigerant channel and is heated by heat exchange in the heat exchange module 500. Then, the gas can enter the combustion chamber 110 through the first branch pipe 420. The setting of the first switching valve 430 allows the operator to adjust the flow rate of the gas entering the combustion chamber 110 through the first branch pipe 420 as needed.

[0046] In a further embodiment of this utility model, reference is made to... Figure 3 The gas supply module 400 also includes a second branch pipe 440 and a second switching valve 450. The two ends of the second branch pipe 440 are respectively connected to the outlet of the combustion-supporting blower 410 and the combustion chamber 110. The second switching valve 450 is located on the second branch pipe 440 and is used to control the on / off state of the first branch pipe 420.

[0047] Understandably, by setting up the second branch pipe 440 and the second switching valve 450, under the action of the combustion-supporting blower 410, the gas can directly enter the combustion chamber 110 through the second branch pipe 440. The setting of the second switching valve 450 allows the operator to adjust the flow rate of the gas entering the combustion chamber 110 through the second branch pipe 440 as needed.

[0048] Understandably, the arrangement of the first branch pipe 420 and the second branch pipe 440 allows the operator to select, based on actual needs, whether the combustion-supporting blower 410 outputs gas into the combustion chamber 110 via the first branch pipe 420 or via the second branch pipe 440. This allows the operator to control the opening and closing of the first switching valve 430 and the second switching valve 450 to regulate whether the gas entering the combustion chamber 110 is of a higher or lower temperature.

[0049] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A shuttle kiln, characterized in that, include: The kiln body has a combustion chamber inside, and the lower wall of the combustion chamber has a smoke exhaust port. The kiln car has a smoke outlet at its bottom. The kiln car has a working state inside the combustion chamber and a loading / unloading state outside the combustion chamber. When the kiln car is in the working state, the smoke outlet is directly opposite the exhaust port. A smoke extraction module is installed on the kiln body. The inlet of the smoke extraction module is connected to the exhaust port. The smoke extraction module is used to discharge the exhaust gas discharged from the exhaust port to the outside of the combustion chamber.

2. A shuttle kiln according to claim 1, characterized in that, The lower wall of the combustion chamber is provided with a strip-shaped groove extending along a preset horizontal direction. The strip-shaped groove has a preset opening facing upward. Multiple cover plates are provided at the preset opening, which are spaced apart along the preset horizontal direction. The exhaust port is formed between any two adjacent cover plates. The inlet of the smoke extraction module is connected to the strip-shaped groove.

3. A shuttle kiln according to claim 2, characterized in that, The kiln car is provided in multiple ways, and the lower cavity wall of the combustion chamber is provided with multiple exhaust ports corresponding to the kiln car.

4. A shuttle kiln according to claim 2 or 3, characterized in that, The cover plate can be adjusted to a position along the preset horizontal direction.

5. A shuttle kiln according to claim 2, characterized in that, Multiple strip grooves are arranged side by side, and multiple smoke outlets are provided on the bottom of the kiln car corresponding to the strip grooves.

6. A shuttle kiln according to claim 1, characterized in that, It also includes a gas supply module and a heat exchange module. The gas supply module is used to supply gas to the combustion chamber. The heat exchange module is connected to the smoke extraction module and the gas supply module respectively. The heat exchange module is used to exchange the heat of the exhaust gas in the smoke extraction module to the gas in the gas supply module.

7. A shuttle kiln according to claim 6, characterized in that, The smoke extraction module includes an exhaust chimney and an exhaust fan. The heat exchange module is provided with a heat medium channel, which is connected to the exhaust chimney and the exhaust port respectively. The exhaust fan is installed on the exhaust chimney and is used to draw the exhaust gas in the exhaust chimney into the outside.

8. A shuttle kiln according to claim 7, characterized in that, The kiln body is also provided with a flue gas passage, the two ends of which are respectively connected to the flue gas outlet and the heat medium passage, and the passage wall of the flue gas passage is provided with a cold air inlet that connects to the outside.

9. A shuttle kiln according to claim 6, characterized in that, The gas supply module includes a combustion-supporting blower, a first branch pipe, and a first switching valve. The heat exchange module is provided with a refrigerant channel. The two ends of the refrigerant channel are respectively connected to the outlet of the combustion-supporting blower and one end of the first branch pipe. The other end of the first branch pipe is connected to the combustion chamber. The first switching valve is located on the first branch pipe and is used to control the opening and closing of the first branch pipe.

10. A shuttle kiln according to claim 9, characterized in that, The gas supply module also includes a second branch pipe and a second switching valve. The two ends of the second branch pipe are respectively connected to the outlet of the combustion-supporting blower and the combustion chamber. The second switching valve is located on the second branch pipe and is used to control the opening and closing of the first branch pipe.

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