A kiln waste heat recovery mechanism and shuttle kiln

Abstract

The utility model relates to shuttle kiln technical field discloses a kind of kiln waste heat recovery mechanism and shuttle kiln, wherein kiln waste heat recovery mechanism includes shell, pipeline assembly and jacking assembly, the inner wall of the shell is fixedly connected with furnace, the pipeline assembly includes two fixed frames, two exhaust fans and two air inlets, the inside of the fixed frame is provided with flue gas pipe and combustion-supporting pipe, the exhaust fan and air inlet are all arranged in the lower end of the outer wall of shell two sides, the flue gas pipe and combustion-supporting pipe are all through fixed frame and shell and are connected with furnace through, the jacking assembly includes two chassis and two jacking plates. In the utility model, high-temperature flue gas is extracted by the exhaust fan of pipeline assembly after heat exchange by fixed frame, and the preheated air is sent into kiln by air inlet, while jacking assembly drives hinged lever jacking kiln car by hydraulic rod, and the double optimization of efficient waste heat recovery and sealed temperature control is realized by the linkage of sealing gasket forming closed combustion space.

Description

Technical Field

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

[0002] A shuttle kiln is an intermittent firing device. The kiln car can be pushed into the kiln for firing and then pulled out for loading and unloading products outside the kiln. Because the back-and-forth movement of the kiln car is similar to that of a weaving shuttle, it is called a shuttle kiln.

[0003] However, because external air needs to be introduced to supplement oxygen and aid combustion during the firing process, the relatively cold external air needs to be heated before the next firing, which slows down the rate of temperature rise in the furnace and reduces firing efficiency.

[0004] Therefore, those skilled in the art have provided a kiln waste heat recovery mechanism to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a kiln waste heat recovery mechanism. High-temperature flue gas is drawn out by the exhaust fan of the pipeline assembly, and after heat exchange through the fixed frame, the preheated air is sent into the kiln by the inlet fan. At the same time, the lifting assembly drives the hinged rod to lift the kiln car through the hydraulic rod, and forms a sealed combustion space with the sealing gasket. The two work together to achieve dual optimization of efficient waste heat recovery and sealed temperature control.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A waste heat recovery mechanism for a kiln includes an outer shell, a pipeline assembly, and a lifting assembly. The inner wall of the outer shell is fixedly connected to a furnace chamber. The pipeline assembly includes two fixed frames, two exhaust fans, and two intake fans. Each fixed frame is equipped with a flue gas pipe and a combustion-supporting pipe. The exhaust fans and intake fans are located at the lower ends of the outer walls on both sides of the outer shell. The flue gas pipes and combustion-supporting pipes pass through the fixed frames and the outer shell and are connected to the furnace chamber. The lifting assembly includes two base frames and two lifting plates. Both sides of the lower end of the outer shell are fixedly connected to the base frames. Multiple hinge rods are hinged to the rear end of the lower end of each lifting plate. The lower ends of the hinge rods are hinged to the base frames. Hydraulic rods are hinged to the front end of the lower end of each lifting plate. The lower ends of the hydraulic rods are hinged to the base frames. Through the above technical solution, the high-temperature flue gas generated by the previous batch of combustion is extracted by the exhaust fan through the flue pipe, and then insulated by the fixed frame. In conjunction with the air intake fan, the external air is sent into the kiln through the combustion aid pipe after passing through the fixed frame for heat exchange and recovery. This heats the external air introduced in this batch, which also raises the initial furnace temperature of the next batch and accelerates the subsequent furnace temperature rise. In addition, the base frame and the lifting plate are hinged together by multiple hinge rods, so that the lifting plate, driven by the hydraulic rod, lifts the kiln car under the furnace chamber. With the help of the sealing gasket, the overall sealing performance is improved, and with the help of the piping components, a good internal heat flow circulation is formed.

[0007] Furthermore, each of the fixed frames is fixedly connected to the middle of the outer walls on both sides of the outer shell by multiple fixing bolts, and the flue pipe and the combustion-supporting pipe are intertwined with each other; The above technical solution uses multiple bolts to fix the fixing frame to the outer walls on both sides of the shell, forming a rigid connection. This fixes the position of the flue pipe and the combustion pipe, ensuring the stability of the pipeline assembly connection. The flue pipe and the combustion pipe are curved in multiple ways and intertwined, which increases the heat exchange distance and makes the heat conduction between the high-temperature flue gas and the outside air more complete.

[0008] Furthermore, the gaps between the inner wall of the fixed frame and the flue pipe and combustion aid pipe are filled with thermal insulation filler made of aluminum silicate fiber. The above technical solution involves filling the fixed frame with insulating filler made of aluminum silicate fiber to enclose the flue and combustion pipe. The low thermal conductivity of aluminum silicate fiber (approximately 0.03-0.06 / (m·K)) fills the gaps in the pipes, reducing heat loss and improving waste heat recovery efficiency.

[0009] Furthermore, the lower ends of both the flue pipe and the combustion-supporting pipe pass through the fixed frame and are fixedly connected to a filter pipe, and the air inlets of both the exhaust fan and the intake fan are fixedly connected to the filter pipe. By using the above technical solution, a filter pipe is fixedly connected between the flue gas pipe and the exhaust fan, and between the combustion pipe and the air intake fan, which can intercept particulate impurities in the flue gas and the outside air, preventing the flue gas from polluting the outside air and preventing foreign objects from entering the kiln.

[0010] A shuttle kiln includes a furnace door and a kiln car. The pipeline assembly is arranged on both sides of the outer shell, the lifting assembly is arranged at the lower end of the outer shell, the furnace door is hinged to the front end of the outer shell, the kiln car is located inside the furnace chamber, and the upper end of the lifting plate is in contact with the kiln car.

[0011] With the above technical solution, the locking handwheel on the outer shell drives the threaded rod to press against the furnace door, which can keep the furnace door closed and seal the outer shell. The kiln car can move on the track laid on the ground for transporting the fired products. When the hydraulic rod pushes the lifting plate up, the kiln car can be lifted a certain distance, reducing the gap between the kiln car and the furnace chamber.

[0012] Furthermore, a control panel is provided on the outer wall at the front end of the furnace door, a gas pipe is provided at the upper end of the outer shell, and the lower end of the gas pipe passes through the outer shell and is connected to the furnace liner. The above technical solution allows staff to easily control the operation of the entire kiln by setting up a control panel on the furnace door. By using the connecting plate at the rear end of the gas pipe and multiple bolts and nuts, the external gas supply pipeline can be connected to the gas pipe, which can then send gas into the furnace chamber. The spark plug inside the gas pipe can ignite the gas and heat the inside of the kiln.

[0013] Furthermore, sealing gaskets are fixedly connected to the upper edge of the kiln car and the outer edge of the rear end of the furnace door, and the sealing gaskets are made of aluminum silicate fiber material. The above technical solution uses sealing gaskets made of aluminosilicate fiber material that are fixedly connected to the kiln car and furnace door. The high temperature resistance and corrosion resistance of aluminosilicate fiber allow it to maintain elastic sealing even in high temperature environments. This can further seal the gaps between the kiln car and the furnace chamber, and between the furnace door and the outer shell, preventing the exchange of internal and external air and effectively blocking heat leakage.

[0014] This utility model has the following beneficial effects: 1. The present invention proposes a kiln waste heat recovery mechanism, which uses an exhaust fan in the pipeline assembly to extract the high-temperature flue gas generated by combustion through the flue pipe, and then insulates it through the fixed frame. In conjunction with the air inlet fan, external air is sent into the kiln through the fixed frame through the combustion aid pipe for heat recovery and utilization. This heats the external air introduced in this batch, thereby raising the initial furnace temperature of the next batch, accelerating the subsequent furnace temperature rise, and improving the firing efficiency.

[0015] 2. The waste heat recovery mechanism of the kiln proposed in this utility model connects the base frame and the lifting plate by multiple hinged rods in the lifting assembly. Under the push of the hydraulic rod, the lifting plate can lift the kiln car under the furnace chamber. The sealing gaskets on the kiln car and the furnace door improve the overall sealing performance, create a closed combustion space, and form a good internal heat flow circulation with the pipeline assembly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the pipeline assembly and lifting assembly structure of a kiln waste heat recovery mechanism proposed in this utility model. Figure 2 Exploded view of the pipeline assembly and lifting assembly of a kiln waste heat recovery mechanism proposed in this utility model; Figure 3 This utility model provides a kiln waste heat recovery mechanism and an overall assembly diagram of a shuttle kiln. Figure 4 This utility model provides a kiln waste heat recovery mechanism and an overall side sectional view of a shuttle kiln. Figure 5 for Figure 4 Enlarged view of point A in the middle; Figure 6 This utility model presents a kiln waste heat recovery mechanism and a combination of shuttle kiln flue gas pipe and combustion aid pipe.

[0017] Explanation of reference numerals in the attached figures: 1. Outer shell; 2. Furnace door; 3. Control panel; 4. Gas pipe; 5. Piping assembly; 501. Fixing frame; 502. Fixing bolts; 503. Flue gas pipe; 504. Combustion aid pipe; 505. Filter pipe; 506. Exhaust fan; 507. Inlet fan; 6. Furnace chamber; 7. Kiln car; 8. Lifting assembly; 801. Base frame; 802. Lifting plate; 803. Hinge rod; 804. Hydraulic rod; 9. Sealing gasket. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 This utility model provides a specific implementation method: A kiln waste heat recovery mechanism includes an outer shell 1, a pipeline assembly 5, and a lifting assembly 8. The inner wall of the outer shell 1 is fixedly connected to a furnace 6. The pipeline assembly 5 includes two fixed frames 501, two exhaust fans 506, and two intake fans 507. Each fixed frame 501 is equipped with a flue gas pipe 503 and a combustion-supporting pipe 504. The exhaust fans 506 and the intake fans 507 are both located at the lower ends of the outer walls on both sides of the outer shell 1. The flue gas pipe 503 and the combustion-supporting pipe 504 pass through the fixed frames 501 and the outer shell 1 and are connected to the furnace 6. The lifting assembly 8 includes two base frames 801 and two lifting plates 802. Both sides of the lower end of the outer shell 1 are fixedly connected to the base frames 801. The rear end of the lower end of the lifting plate 802 is hinged with multiple hinge rods 803. The lower end of each hinge rod 803 is hinged to the base frame 801. The front end of the lower end of the lifting plate 802 is hinged with a hydraulic rod 804. The lower end of each hydraulic rod 804 is hinged to the base frame 801.

[0020] The exhaust fan 506 in the piping assembly 5 extracts the high-temperature flue gas generated by the previous batch of combustion through the flue gas pipe 503. The flue gas is then insulated by the fixed frame 501. In conjunction with the air intake fan 507, the external air is introduced into the kiln through the combustion aid pipe 504 after passing through the fixed frame 501 for heat recovery and utilization. This heats the external air introduced in this batch, raising the initial furnace temperature of the next batch and accelerating the subsequent furnace temperature rise, thus improving firing efficiency. In addition, the base frame 801 and the lifting plate 802 are hinged together by multiple hinge rods 803 in the lifting assembly 8. Under the push of the hydraulic rod 804, the lifting plate 802 can lift the kiln car 7 under the furnace chamber 6. Together with the sealing gasket 9 on the kiln car 7 and the furnace door 2, the overall sealing is improved, creating a closed combustion space and forming a good internal heat flow circulation with the piping assembly 5.

[0021] The fixed frame 501 is fixedly connected to the middle of the outer walls on both sides of the outer shell 1 by multiple fixing bolts 502. The flue gas pipe 503 and the combustion-supporting pipe 504 are intertwined. By using multiple bolts to fix the fixed frame 501 to the outer walls on both sides of the outer shell 1, a rigid connection is formed, which fixes the position of the flue gas pipe 503 and the combustion-supporting pipe 504, ensuring the stability of the connection of the pipeline assembly 5. The flue gas pipe 503 and the combustion-supporting pipe 504 have multiple bends and are intertwined, which increases the heat exchange distance and makes the heat conduction between the high-temperature flue gas and the outside air more complete. The gaps between the inner wall of the fixed frame 501 and the flue gas pipe 503 and the combustion-supporting pipe 504 are filled with thermal insulation filler made of aluminum silicate fiber. The flue gas pipe 503 and the combustion-supporting pipe 504 are filled with thermal insulation filler made of aluminum silicate fiber. The low thermal conductivity of aluminum silicate fiber (approximately 0.03-0.06 W / (m·K)) fills the gaps in the pipes, reducing heat loss and improving waste heat recovery efficiency. The lower ends of the flue gas pipe 503 and the combustion-supporting pipe 504 are both connected to the fixed frame 501 and the filter pipe 505. The air inlets of the exhaust fan 506 and the air inlet fan 507 are both fixedly connected to the filter pipe 505. By fixing a section of filter pipe 505 between the flue gas pipe 503 and the exhaust fan 506, and between the combustion-supporting pipe 504 and the air inlet fan 507, particulate impurities in the flue gas and the outside air can be intercepted, preventing the flue gas from polluting the outside air and preventing foreign objects from entering the kiln.

[0022] Reference Figure 3A shuttle kiln includes a furnace door 2 and a kiln car 7. Pipeline assemblies 5 are located on both sides of an outer shell 1, and a lifting assembly 8 is located at the lower end of the outer shell 1. The furnace door 2 is hinged to the front end of the outer shell 1. The kiln car 7 is located inside the furnace chamber 6. The upper ends of the lifting plates 802 are all in contact with the kiln car 7. By using a locking handwheel on the outer shell 1, the threaded rod is driven to push against the furnace door 2, keeping the furnace door 2 closed and sealing the outer shell 1. The kiln car 7 can move on a track laid on the ground for transporting fired products. When the hydraulic rod 804 pushes the lifting plate 802 upward, the kiln car 7 can be slightly raised a certain distance, reducing the gap between the kiln car 7 and the furnace chamber 6. A control panel 3 is provided on the outer wall at the front end of the furnace door 2. A gas pipe 4 is provided at the upper end of the outer shell 1. The lower ends of the gas pipe 4 all penetrate the outer shell 1 and are connected to the furnace chamber 6. The control panel 3 on the top allows staff to easily control the operation of the entire kiln. Using the connecting disc at the rear of the gas pipe 4, along with multiple bolts and nuts, the external gas supply pipeline can be connected to the gas pipe 4, allowing gas to be delivered into the furnace chamber 6. The spark plug inside the gas pipe 4 ignites the gas, heating the interior of the kiln. Sealing gaskets 9 are fixedly connected to the upper edge of the kiln car 7 and the outer edge of the rear wall of the furnace door 2. These sealing gaskets 9 are made of aluminosilicate fiber. The high-temperature resistance and corrosion resistance of the aluminosilicate fiber allow it to maintain elasticity and seal even at high temperatures, further sealing the gaps between the kiln car 7 and the furnace chamber 6, and between the furnace door 2 and the outer shell 1, preventing air exchange and effectively blocking heat loss.

[0023] Working principle: When using the waste heat recovery mechanism and shuttle kiln, the operator first connects the external gas supply pipeline to the gas pipe 4 using bolts and nuts. Then, the operator pushes the kiln car 7, which contains the items to be fired, into the kiln along the ground track. Next, the operator uses the hinge rod 803 to hinge the base frame 801 and the lifting plate 802. The operator controls the hydraulic rod 804 through the control panel 3 to push the lifting plate 802 upward, placing the kiln car 7 under the furnace chamber 6. Then, the operator closes the furnace door 2. At this time, the kiln car 7 and the sealing gasket 9 on the furnace door 2 are lifted. To ensure overall sealing, gas is introduced into the kiln through an external gas pipeline, and ignited by a spark plug in the gas pipe 4 for firing. Afterwards, the high-temperature flue gas generated by the previous batch of combustion is extracted through the flue pipe 503 by the exhaust fan 506, and kept warm by the fixed frame 501. In conjunction with the intake fan 507, external air is introduced into the kiln through the combustion aid pipe 504 after passing through the fixed frame 501 for heat recovery and utilization. This heats the external air introduced in this batch, raising the initial furnace temperature of the next batch and accelerating the subsequent furnace temperature rise.

[0024] The following points should be noted in this article: 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in a general design.

[0025] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A kiln waste heat recovery mechanism, comprising a shell (1), a pipeline assembly (5), and a lifting assembly (8), characterized in that: The inner wall of the outer shell (1) is fixedly connected to the furnace liner (6). The pipeline assembly (5) includes two fixed frames (501), two exhaust fans (506) and two air inlets (507). The interior of each fixed frame (501) is provided with a flue gas pipe (503) and a combustion-supporting pipe (504). The exhaust fans (506) and air inlets (507) are both located at the lower ends of the outer walls on both sides of the outer shell (1). The flue gas pipe (503) and the combustion-supporting pipe (504) pass through the fixed frame (501) and the outer shell (1) and are connected to the furnace liner (6). The lifting assembly (8) includes two base frames (801) and two lifting plates (802). The lower ends of the outer shell (1) are fixedly connected to both sides of the base frames (801). The rear ends of the lower ends of the lifting plates (802) are all hinged to multiple hinge rods (803). The lower ends of the hinge rods (803) are all hinged to the base frames (801). The front ends of the lower ends of the lifting plates (802) are all hinged to hydraulic rods (804). The lower ends of the hydraulic rods (804) are all hinged to the base frames (801).

2. The kiln waste heat recovery mechanism according to claim 1, characterized in that: The fixed frame (501) is fixedly connected to the middle of the outer walls on both sides of the outer shell (1) by multiple fixing bolts (502), and the flue pipe (503) and the combustion-supporting pipe (504) are intertwined.

3. The kiln waste heat recovery mechanism according to claim 1, characterized in that: The gaps between the inner wall of the fixed frame (501) and the flue pipe (503) and the combustion-supporting pipe (504) are filled with thermal insulation filler made of aluminum silicate fiber.

4. The kiln waste heat recovery mechanism according to claim 1, characterized in that: The lower ends of the flue pipe (503) and the combustion-supporting pipe (504) both pass through the fixed frame (501) and are fixedly connected to the filter pipe (505). The air inlets of the exhaust fan (506) and the air inlet fan (507) are both fixedly connected to the filter pipe (505).

5. A shuttle kiln, comprising a waste heat recovery mechanism for a kiln as described in any one of claims 1-4, characterized in that, The furnace includes a furnace door (2) and a kiln car (7). The pipeline assembly (5) is located on both sides of the outer shell (1). The lifting assembly (8) is located at the lower end of the outer shell (1). The furnace door (2) is hinged to the front end of the outer shell (1). The kiln car (7) is located inside the furnace chamber (6). The upper end of the lifting plate (802) is in contact with the kiln car (7).

6. A shuttle kiln according to claim 5, characterized in that: The outer wall of the front end of the furnace door (2) is provided with a control panel (3), and the upper end of the outer shell (1) is provided with a gas pipe (4). The lower end of the gas pipe (4) passes through the outer shell (1) and is connected to the furnace liner (6).

7. A shuttle kiln according to claim 5, characterized in that: Sealing gaskets (9) are fixedly connected to the upper edge of the kiln car (7) and the outer edge of the rear end of the furnace door (2). The sealing gaskets (9) are made of aluminum silicate fiber material.

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