A multi-layer electric kiln

Abstract

This utility model provides a multi-layer electric kiln, including a furnace body. The furnace body is divided into n+1 layers of furnace cavities by n movable baffle assemblies. Each movable baffle assembly includes a plurality of baffles, which are rotatably disposed in the furnace body via a rotating shaft. One end of the rotating shaft passes through the furnace body and is connected to a rotating motor. The operation of the rotating motor drives the rotating shaft to rotate the baffles, thereby connecting adjacent furnace cavities. When the temperature of the lower furnace cavity is too high or the temperature of the upper furnace cavity is too low, the heat from the lower furnace cavity will be transferred to the upper furnace cavity, realizing the utilization of excess heat.

Description

Technical Field

[0001] This utility model relates to the field of kiln technology, specifically to a multi-layer electric kiln. Background Technology

[0002] Kilns, as important thermal equipment in industrial production, are widely used in ceramics, metallurgy, building materials, and other fields. Existing kiln equipment utilizes various energy sources, such as coal, natural gas, and electricity. Electric kilns, compared to other types of kilns, have significant technological advantages in temperature control and reduced gas emissions. However, these kilns often consume enormous amounts of energy during operation. Raising the kiln from room temperature to its operating temperature requires a large amount of energy, and after reaching the required temperature, additional energy is needed for heat preservation. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a multi-layer electric kiln that saves costs and reduces energy consumption.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A multi-layer electric kiln includes a furnace body, wherein the furnace body is divided into n+1 layers of furnace cavities by n movable baffle assemblies, wherein the movable baffle assembly includes a plurality of baffles, and the plurality of baffles are rotatably disposed in the furnace body by a rotating shaft; one end of the rotating shaft passes through the furnace body and is connected to a rotating motor.

[0006] In one embodiment, the baffle is a Z-shaped baffle, and the baffle is an alumina ceramic fiber insulation board.

[0007] In one embodiment, the furnace cavity is equipped with a conveyor belt driven by a power unit.

[0008] In one embodiment, the conveyor belts in two adjacent furnace cavities move in opposite directions: wherein the front end length of the conveyor belt in the single-layer furnace cavity is longer than the length of the conveyor belt in the double-layer furnace cavity, and the rear end length of the conveyor belt in the double-layer furnace cavity is longer than the length of the conveyor belt in the single-layer furnace cavity.

[0009] In one embodiment, a first hopper is provided below the rear end of the conveyor belt in the single-layer furnace cavity, and the lower end of the first hopper passes through the movable baffle assembly and is located above the conveyor belt in the double-layer furnace cavity adjacent to the lower end of the single-layer furnace cavity.

[0010] A second hopper is provided below the front end of the conveyor belt in the double-layer furnace cavity. The lower end of the second hopper passes through the movable baffle assembly and is located above the conveyor belt in the single-layer furnace cavity adjacent to the lower end of the double-layer furnace cavity.

[0011] In one embodiment, a feeding hopper is provided at one end of the top of the furnace body.

[0012] In one embodiment, the bottommost furnace cavity of the furnace body is connected to a conveying cavity, and the conveyor belt in the bottommost furnace cavity of the furnace body passes through the conveying cavity and extends out of the conveying cavity.

[0013] In one embodiment, the furnace body is provided with n+1 exhaust pipes on its exterior, and the n+1 exhaust pipes are respectively connected to the n+1 layers of furnace cavities. An exhaust fan is provided on the conveying cavity, and the exhaust fan is connected to the n+1 exhaust pipes through an exhaust gas collection pipe. An exhaust gas treatment device is provided on the top of the furnace body, and the exhaust gas treatment device is connected to the exhaust fan through an exhaust gas recovery pipe. The exhaust gas treatment device is connected to the bottom layer of the furnace cavity through an input pipe.

[0014] In one embodiment, each of the n+1 layers of the furnace cavity is equipped with an electric heating system and a thermocouple.

[0015] In one embodiment, the outer wall of the furnace body is provided with a removable insulation board.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention utilizes a furnace body, within which an internal structure is divided into n+1 layers of furnace cavities by n movable baffle assemblies. Each movable baffle assembly comprises a plurality of baffles, each rotatably mounted within the furnace body via a rotating shaft. One end of the rotating shaft passes through the furnace body and connects to a rotating motor. The operation of the rotating motor drives the shaft to rotate the baffles, connecting adjacent furnace cavities. This allows heat to be transferred from the lower furnace cavity to the upper cavity when the temperature is too high or too low, thus utilizing excess heat. This solves the technical problem of kilns requiring additional energy for heat preservation after reaching the desired temperature. Attached Figure Description

[0018] Figure 1 This is a front structural diagram of Embodiment 1 of the present utility model;

[0019] Figure 2 This utility model Figure 1 A schematic diagram of the rear structure;

[0020] Figure 3 This utility model Figure 1 A schematic diagram of the front sectional structure;

[0021] Figure 4 This utility model Figure 3 A schematic diagram of the active baffle assembly.

[0022] In the diagram: 10. Furnace body, 11. Feeding hopper, 20. Movable baffle assembly, 21. Baffle, 30. Furnace cavity, 40. Conveyor belt, 50. Rotating shaft, 60. Rotating motor, 70. First feeding hopper, 75. Second feeding hopper, 80. Conveying chamber, 90. Waste discharge pipe, 91. Waste discharge fan, 92. Waste gas collection pipe, 93. Waste gas treatment device, 94. Waste gas recovery pipe, 95. Input pipe. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Example 1

[0025] like Figure 1-4 As shown, this embodiment includes a furnace body 10. The interior of the furnace body 10 is divided into n+1 layers of furnace cavities 30 by n movable baffle assemblies 20. Thus, the furnace cavities 30 in the furnace body 10 are physically separated by the movable baffle assemblies 20.

[0026] The movable baffle assembly 20 includes a plurality of baffles 21. In this embodiment, the movable baffle assembly 20 includes a plurality of baffles 21 and two fixed baffles. The two fixed baffles are respectively fixedly connected to both ends of the furnace body 10, and the baffles 21 are disposed between the two fixed baffles.

[0027] Multiple baffles 21 are rotatably mounted inside the furnace body 10 via rotating shafts 50. One end of the rotating shaft 50 passes through the furnace body 10 and is connected to a rotating motor 60. In this embodiment, one end of the rotating shaft 50 passes through the furnace body 10 and is connected to a driven gear. The output shaft of the rotating motor 60 is equipped with a driving gear that meshes with the driven gear. Thus, the operation of the rotating motor 60 can drive the rotating shaft 50 to rotate the baffles 21, thereby connecting two adjacent furnace chambers 30. When the temperature of the lower furnace chamber 30 is too high and the temperature of the upper furnace chamber is too low, the heat of the lower furnace chamber 30 will be transferred to the upper furnace chamber, realizing the utilization of excess heat. This solves the technical problem that the kiln still needs to consume additional energy for heat preservation after reaching the required temperature.

[0028] In this embodiment, since each baffle 21 is controlled by an individual rotation motor 60, multiple baffles 21 can be opened together or individually as needed.

[0029] In this embodiment, the baffle 21 is a Z-shaped baffle, and the baffle 21 is an alumina ceramic fiber heat insulation board; thus, when the rotating motor 60 is started, the baffle 21 rotates, which can connect two or more furnace chambers 30. This design allows each furnace chamber 30 to work independently or collaboratively to meet different process requirements, minimizing heat loss and ensuring temperature stability of each layer.

[0030] The furnace cavity 30 is equipped with a conveyor belt 40 driven by a power unit; each of the n+1 layers of furnace cavities 30 is equipped with an electric heating system and a thermocouple. In this embodiment, the electric heating system includes a heating wire, which is set at the upper and lower ends of the conveyor belt 40 and connected to the inner wall of the furnace body 10 through a connector. The thermocouple is also connected to the inner wall of the furnace body 10, so that the temperature inside the furnace cavity 30 can be monitored in real time through the thermocouple.

[0031] In addition, it includes a control system, which is electrically connected to the conveyor belt 40, the electric heating system, the thermocouple, and the rotating motor 60.

[0032] First, when the furnace body 10 starts operating, the electric heating system in the lowest layer of the furnace cavity 30 is activated first to heat that layer. Operators can precisely set the target temperature and the required heating / holding time curve through the control system.

[0033] During operation, thermocouples monitor the temperature of each furnace cavity 30 in real time. When the temperature of the lower furnace cavity 30 is detected to significantly exceed the set value, the control system will issue a command to drive the baffle 21 separating the lower cavity from the adjacent upper cavity to open automatically, so as to transfer heat and bring it to the specified temperature.

[0034] After the baffle 21 is opened, the previously separated upper and lower furnace chambers are connected. Excess heat from the lower chamber naturally flows to the upper chamber, effectively utilizing excess heat to preheat or supplement the upper chamber, achieving a dynamic balance between the upper and lower chamber temperatures and improving overall heat utilization efficiency. Once the temperature returns to equilibrium or meets process requirements, the baffle 21 can be closed again.

[0035] A feeding hopper 11 is provided at one end of the top of the furnace body 10; the conveyor belts 40 in the two adjacent furnace chambers 30 move in opposite directions: the front end of the conveyor belt 40 in the single-layer furnace chamber 30 is longer than the length of the conveyor belt 40 in the double-layer furnace chamber 30, and the rear end of the conveyor belt 40 in the double-layer furnace chamber 30 is longer than the length of the conveyor belt 40 in the single-layer furnace chamber 30.

[0036] A first hopper 70 is provided below the rear end of the conveyor belt 40 in the single-layer furnace cavity 30. The lower end of the first hopper 70 passes through the movable baffle assembly 20 and is located above the conveyor belt 40 in the double-layer furnace cavity 30 adjacent to the lower end of the single-layer furnace cavity 30. A second hopper 75 is provided below the front end of the conveyor belt 40 in the double-layer furnace cavity 30. The lower end of the second hopper 75 passes through the movable baffle assembly 20 and is located above the conveyor belt 40 in the single-layer furnace cavity 30 adjacent to the lower end of the double-layer furnace cavity 30.

[0037] The lowest furnace cavity 30 inside the furnace body 10 is connected to the conveying cavity 80. The conveyor belt 40 inside the lowest furnace cavity 30 of the furnace body 10 passes through the conveying cavity 80 and extends out of the conveying cavity 80. Thus, the material enters the furnace body 10 through the feeding hopper 11, is heated in the furnace body 10, passes through multiple furnace cavities 30 via the conveyor belt 40 to achieve heating and drying, and is then conveyed out through the conveying cavity 80.

[0038] In this embodiment, a discharge hopper is provided below one end of the conveyor belt 40 extending out of the conveying chamber 80. The discharge hopper is used to collect the heated and dried material.

[0039] In this embodiment, since the lowest furnace cavity 30 within the furnace body 10 is connected to the conveying cavity 80, this layer serves as a dual-purpose section for both heating and cooling. In this embodiment, the uppermost furnace cavity 30 within the furnace body 10 does not contain an electric heating system or thermocouples; therefore, a removable insulated top plate is specifically provided. This can be flexibly selected according to process requirements: when the top plate is removed, this section can directly contact the air, thereby achieving rapid heat dissipation and cooling; while when the insulated top plate is installed, a closed space is formed above this section, at which point the heating wires around the mesh belt can be activated for heating, providing more precise or higher-intensity heating capabilities.

[0040] In this embodiment, the outer wall of the furnace body 10 is provided with a removable insulation board, which is composed of several removable insulation blocks; thus, by removing the insulation board, the furnace body can be directly exposed to the air, thereby achieving rapid heat dissipation and cooling; when the insulation board is installed on the outer wall of the furnace body 10, the furnace body 10 can form a closed space to provide more precise or higher intensity heating capacity.

[0041] The furnace body 10 is provided with n+1 exhaust pipes 90 on its exterior. The n+1 exhaust pipes 90 are connected to the n+1 furnace chambers 30 respectively. The conveying chamber 80 is provided with an exhaust fan 91. The exhaust fan 91 is connected to the n+1 exhaust pipes 90 through an exhaust gas collection pipe 92. The top of the furnace body 10 is provided with an exhaust gas treatment device 93. The exhaust gas treatment device 93 is connected to the exhaust fan 91 through an exhaust gas recovery pipe 94. The exhaust gas treatment device 93 is connected to the furnace chamber 30 at the bottom of the furnace body 10 through an input pipe 95.

[0042] In this embodiment, the exhaust gas treatment device 93 is provided with an exhaust port controlled by a valve.

[0043] When the material begins to roast, the exhaust gas generated during the operation of the furnace body 10 is continuously extracted from the furnace cavity 30 by the exhaust fan 91 through the exhaust gas collection pipe 92. The exhaust gas then enters the exhaust gas treatment device 93 through the exhaust gas recovery pipe 94 for VOC or desulfurization treatment, and can be discharged into the atmosphere. Due to the suction effect of the exhaust fan 91, a certain negative pressure will be formed inside the furnace body relative to the external environment. In this embodiment, each layer of the furnace cavity 30 is also equipped with a pressure measuring device to monitor and record the furnace cavity 30 in real time.

[0044] The exhaust gas, purified by the waste gas treatment device 93, can be reintroduced into the furnace body 10 through the inlet pipe 95 and valves, depending on process requirements. Due to the residual heat of the exhaust gas, energy is further saved. This achieves partial recycling of heat.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the technical solutions of this utility model have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A multi-layer electric kiln, characterized in that: The furnace includes a furnace body (10), which is divided into n+1 furnace chambers (30) by n movable baffle assemblies (20). Each movable baffle assembly (20) includes a plurality of baffles (21), which are rotatably disposed in the furnace body (10) by a rotating shaft (50). One end of the rotating shaft (50) passes through the furnace body (10) and is connected to a rotating motor (60).

2. The multi-layer electric kiln according to claim 1, characterized in that: The baffle (21) is a Z-shaped baffle, and the baffle (21) is an alumina ceramic fiber heat insulation board.

3. The multi-layer electric kiln according to claim 1, characterized in that: The furnace cavity (30) is equipped with a conveyor belt (40) driven by a power unit.

4. The multi-layer electric kiln according to claim 3, characterized in that: The conveyor belts (40) in two adjacent furnace chambers (30) move in opposite directions: the front end of the conveyor belt (40) in the single-layer furnace chamber (30) is longer than the length of the conveyor belt (40) in the double-layer furnace chamber (30), and the rear end of the conveyor belt (40) in the double-layer furnace chamber (30) is longer than the length of the conveyor belt (40) in the single-layer furnace chamber (30).

5. The multi-layer electric kiln according to claim 4, characterized in that: A first feeding hopper (70) is provided below the rear end of the conveyor belt (40) in the single-layer furnace cavity (30). The lower end of the first feeding hopper (70) passes through the movable baffle assembly (20) and is located above the conveyor belt (40) in the double-layer furnace cavity (30) adjacent to the lower end of the single-layer furnace cavity (30). A second hopper (75) is provided below the front end of the conveyor belt (40) in the double-layer furnace cavity (30). The lower end of the second hopper (75) passes through the movable baffle assembly (20) and is located above the conveyor belt (40) in the single-layer furnace cavity (30) adjacent to the lower end of the double-layer furnace cavity (30).

6. The multi-layer electric kiln according to claim 5, characterized in that: A feeding hopper (11) is provided at one end of the top of the furnace body (10).

7. The multi-layer electric kiln according to claim 6, characterized in that: The furnace cavity (30) at the bottom of the furnace body (10) is connected to a conveying cavity (80), and the conveyor belt (40) in the furnace cavity (30) at the bottom of the furnace body (10) passes through the conveying cavity (80) and extends out of the conveying cavity (80).

8. The multi-layer electric kiln according to claim 7, characterized in that: The furnace body (10) is provided with n+1 exhaust pipes (90) on its exterior. The n+1 exhaust pipes (90) are respectively connected to the n+1 furnace chambers (30). The conveying chamber (80) is provided with an exhaust fan (91). The exhaust fan (91) is connected to the n+1 exhaust pipes (90) through an exhaust gas collection pipe (92). The top of the furnace body (10) is provided with an exhaust gas treatment device (93). The exhaust gas treatment device (93) is connected to the exhaust fan (91) through an exhaust gas recovery pipe (94). The exhaust gas treatment device (93) is connected to the furnace chamber (30) at the bottom layer of the furnace body (10) through an input pipe (95).

9. The multi-layer electric kiln according to claim 8, characterized in that: Each of the n+1 layers of the furnace cavity (30) is equipped with an electric heating system and a thermocouple.

10. The multi-layer electric kiln according to claim 1, characterized in that: The outer wall of the furnace body (10) is equipped with a removable insulation board.

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