A sectional uniform smoke exhaust device for graphitization furnace

Abstract

The utility model discloses a kind of graphitization furnace subsection type uniform smoke exhaust device, including the smoke exhaust hood consisting of framework and cover plate, the end of smoke exhaust hood is equipped with end sealing plate, and is divided into left segment smoke exhaust hood and right segment smoke exhaust hood independent of each other;Every segment smoke exhaust hood middle part is equipped with independent smoke exhaust main pipe, smoke exhaust main pipe is communicated with two segment smoke exhaust pipes symmetrical left and right, multiple equidistantly arranged wedge-shaped slit mouths are set in the bottom of smoke exhaust pipe, and the slit height gradually increases from the end close to smoke exhaust main pipe to the direction away from it. Significantly improve the far end negative pressure uniformity of super-long graphitization furnace;Smoke exhaust main pipe is connected with underground flue through reducing pipe and forms no connecting piece snap structure, realizes the quick hoisting and sealing of smoke exhaust hood. The utility model solves the problem of smoke emission and poor airflow organization in the prior art, ensures uniform smoke exhaust of graphitization furnace, improves smoke exhaust efficiency, and protects production environment and safety.

Description

Technical Field

[0001] This utility model relates to the field of flue gas collection technology for graphitization furnaces, specifically to a segmented uniform flue gas exhaust device suitable for ultra-long graphitization furnaces. Background Technology

[0002] Graphite products are widely used in metallurgy, chemical industry, and new energy fields due to their high thermal conductivity, corrosion resistance, and mechanical strength. In the graphitization furnace process, graphitization furnaces are one of the key pieces of equipment, generating large amounts of harmful fumes containing dust, sulfur dioxide, and carbon monoxide during operation. With the continuous increase in industrial capacity, the length of graphitization furnaces has also increased, with large furnaces exceeding 30 meters in length now appearing. However, existing graphitization furnace exhaust systems have significant design flaws; the main exhaust pipe of the exhaust hood is usually located at one end along the length of the hood. When the graphitization furnace is long, this end-mounted exhaust pipe structure leads to serious exhaust problems: the negative pressure in the far-end area of ​​the exhaust hood, far from the main exhaust pipe, is extremely low or even nonexistent, resulting in chaotic airflow organization and extremely poor overall exhaust uniformity. This directly causes a significant decrease in exhaust efficiency and poses a great threat to the physical and mental health of workers who work on the front lines for extended periods. Therefore, there is an urgent need for a new type of device that can adapt to long furnace structures and achieve uniform and efficient exhaust. Utility Model Content

[0003] To address the aforementioned shortcomings, this utility model aims to provide a segmented uniform flue gas exhaust device for graphitization furnaces, thereby solving the problems of poor internal airflow organization, uneven flue gas exhaust, and flue gas leakage from distant locations in existing flue gas exhaust devices.

[0004] To achieve the above technical objectives, the following technical solutions were adopted: A segmented uniform smoke exhaust device for a graphitization furnace includes a smoke exhaust hood, which is composed of a frame and a cover plate. End sealing plates are provided at both ends of the smoke exhaust hood. The smoke exhaust hood includes a left section smoke exhaust hood and a right section smoke exhaust hood, which are independent of each other. Each section smoke exhaust hood is provided with a main smoke exhaust pipe and two sections of smoke exhaust pipe. One end of the main smoke exhaust pipe is connected to the two sections of smoke exhaust pipe through a tee pipe, and the other end is fixed to the corresponding section smoke exhaust hood and extends out of the corresponding section smoke exhaust hood. The bottom of the smoke exhaust pipe has a plurality of equidistantly arranged wedge-shaped slots along its length.

[0005] Furthermore, the main exhaust pipe is located in the middle of each exhaust hood section, and the two exhaust pipe sections are symmetrically arranged on the left and right sides relative to the main exhaust pipe.

[0006] Furthermore, the height of the wedge-shaped slot gradually increases from the end closest to the main exhaust pipe toward the end furthest from the main exhaust pipe.

[0007] Furthermore, each exhaust manifold is equipped with an exhaust regulating valve at the end outside the exhaust hood to balance the exhaust volume of the left and right exhaust hoods.

[0008] Furthermore, each main exhaust pipe is connected to the underground flue via a reducing pipe. The reducing pipe is located below the corresponding exhaust regulating valve, and its inlet diameter is larger than the diameter of the underground flue pipe, forming a fastening structure without connectors.

[0009] Furthermore, the joint between the reducing pipe and the underground flue is filled with fiber felt to achieve a seal and prevent air leakage.

[0010] Furthermore, the lower edges of both sides of the smoke hood are symmetrically provided with several equally spaced, equal-height slits.

[0011] Furthermore, the frame of the smoke hood is provided with reinforcing ribs and lifting lugs; the area enclosed by the reinforcing ribs and the frame is used to fix the smoke exhaust pipe, and the lifting lugs are used to suspend the smoke hood.

[0012] Furthermore, the cross-section of the smoke hood is arched, and an explosion vent is provided on one side of the cover plate at the top of the arch, corresponding to the position of each section of the smoke duct.

[0013] Furthermore, the length ratio of the left section smoke hood to the right section smoke hood is 1:1.

[0014] The beneficial effects achieved by this utility model are as follows: Compared with existing technologies, this utility model provides a segmented uniform smoke exhaust device for graphitization furnaces. This smoke exhaust device divides the smoke hood into independent left and right sections, each with its own independent main exhaust pipe. The main exhaust pipe connects the left and right sections within the smoke hood. This design effectively avoids the uneven smoke exhaust caused by distance differences in traditional smoke exhaust devices, ensuring that smoke from all areas within the graphitization furnace is evenly and promptly discharged. Simultaneously, wedge-shaped slots are opened at the bottom of the exhaust pipes, with the slot height gradually increasing from the end closest to the main exhaust pipe towards the distance. This effectively guides the smoke within the smoke hood, significantly improving airflow organization. These multiple measures ensure uniform smoke exhaust within the smoke hood, preventing smoke escape and improving the workshop environment. A smoke exhaust regulating valve is installed at the end of the main exhaust pipe, allowing flexible adjustment of the smoke exhaust volume of the two sections based on the smoke generation in corresponding areas of the left and right smoke hoods, further improving the rationality and effectiveness of smoke exhaust. The main exhaust pipe connects to the underground flue via a reducer. The reducer's inlet diameter is larger than the underground flue's diameter, creating a seamless, interlocking structure. The joints are sealed with fiber felt to prevent air leakage. This connection method significantly reduces air leakage during exhaust, improves exhaust efficiency, and reduces energy waste. Attached Figure Description

[0015] The present invention will now be described in conjunction with the accompanying drawings.

[0016] Figure 1 This is the front view of the overall structural schematic diagram of this utility model.

[0017] Figure 2 This is a top view of the overall structure of this utility model.

[0018] Figure 3 This is a left view of the overall structural schematic diagram of this utility model.

[0019] In the diagram: 1-Smoke hood; 1.1-Left section smoke hood; 1.2-Right section smoke hood; 2-Frame; 3-Hood cover plate; 4-End sealing plate; 5-Smoke exhaust pipe; 6-Smoke exhaust main pipe; 7-Reinforcing rib; 8-Lifting lug; 9-Explosion relief port; 10-Wedge-shaped slot; 11-Equal height slot; 12-Smoke exhaust regulating valve; 13-Reducing pipe; 14-Fiber felt. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. The described embodiments are merely some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] like Figure 1-3 As shown, the present invention provides a uniform smoke exhaust device for a graphitization furnace, including a smoke exhaust hood 1. The smoke exhaust hood 1 is composed of a frame 2 and a cover plate 3. End sealing plates 4 are provided at both ends of the smoke exhaust hood 1 to seal both ends of the smoke exhaust hood 1 and prevent smoke leakage.

[0022] The exhaust hood 1 includes a left exhaust hood 1.1 and a right exhaust hood 1.2 that are independent of each other. The length ratio of the left exhaust hood 1.1 to the right exhaust hood 1.2 is 1:1. This segmented arrangement allows the exhaust device to control the exhaust of the left and right sections of the graphitization furnace separately, thereby improving the targeting of the exhaust.

[0023] Each section of the fume hood is equipped with a main exhaust pipe 6 and two exhaust pipes 5. The main exhaust pipe 6 is located in the middle of the corresponding section of the fume hood, serving as the main exhaust channel for that section. One end of the main exhaust pipe 6 is connected to the two exhaust pipes 5 via a T-junction, while the other end is fixed to the corresponding section of the fume hood and extends outside the hood. The two exhaust pipes 5 are symmetrically arranged relative to the main exhaust pipe 6, used to collect the smoke from the corresponding area and transport it to the main exhaust pipe 6. Multiple equidistant wedge-shaped slots 10 are formed at the bottom of the exhaust pipe 5 along its length. The height of the wedge-shaped slots 10 gradually increases from the end closest to the main exhaust pipe 6 towards the end furthest from it. The specific height can be determined through calculation and numerical simulation experiments. Since the smoke extraction force is relatively weaker the farther away from the main exhaust pipe 6, gradually increasing the slot height increases the exhaust area at a distance, thereby balancing the smoke extraction volume at different locations and achieving uniform smoke extraction.

[0024] Each exhaust manifold 6 is equipped with an exhaust regulating valve 12 at one end outside the exhaust hood 1. The exhaust regulating valve 12 can adjust the exhaust volume of the two exhaust manifolds according to the amount of smoke in the corresponding areas of the left exhaust hood 1.1 and the right exhaust hood 1.2, so as to balance the exhaust volume of the left exhaust hood 1.1 and the right exhaust hood 1.2 and ensure the exhaust effect.

[0025] Each main exhaust pipe 6 connects to the underground flue via a reducer 13. The reducer 13 is located below the corresponding exhaust regulating valve 12, and its inlet diameter is larger than that of the underground flue, forming a seamless, interlocking structure. This structure eliminates the need for additional connectors, simplifying the installation process and reducing potential air leakage points caused by connectors. The joint between the reducer 13 and the underground flue is filled with fiber felt 14, which has excellent sealing properties and effectively prevents air leakage.

[0026] The lower edges of both sides of the smoke hood 1 are symmetrically provided with several equally spaced, equal-height slits 11, which serve as air inlets for the smoke hood 1.

[0027] The frame 2 of the smoke hood 1 is equipped with reinforcing ribs 7 and lifting lugs 8. The area enclosed by the reinforcing ribs 7 and the frame 2 is used to fix the smoke exhaust pipe 5, which enhances the stability of the smoke exhaust pipe 5 installation and prevents the smoke exhaust pipe 5 from shaking or shifting during smoke exhaust. The lifting lugs 8 are used to hoist the smoke hood 1, which facilitates the installation and transportation of the smoke exhaust device.

[0028] The cross-section of the exhaust hood 1 is arched. On the cover plate 3 at the top of the arch, there are explosion relief ports 9 on one side corresponding to the position of each exhaust pipe 5. When an abnormal pressure rise occurs in the furnace, the explosion relief ports 9 can open in time to release the pressure, making the equipment operation safer.

[0029] The working principle of this utility model is as follows: The left and right exhaust hoods 1.1 and 1.2 are installed adjacent to each other above the graphitization furnace using lifting lugs 8. During graphitization furnace operation, the purification system's exhaust fan is activated, and the opening of the exhaust regulating valve 12 is adjusted to ensure a balanced exhaust volume between the left and right exhaust hoods 1.1 and 1.2. Under the negative pressure of the exhaust fan, external air enters the exhaust hoods through the equal-height slots 11, replenishing the fresh air required for combustion in the graphitization furnace. The combusted flue gas enters the two exhaust pipes 5 evenly through the wedge-shaped slots 10, then converges into the main exhaust pipe 6, and finally enters the underground flue through the reducer 13, ultimately reaching the flue gas purification system. When it is necessary to remove the exhaust hood 1, either the left or right exhaust hood 1.1 can be lifted arbitrarily using the lifting lugs 8.

[0030] Other aspects of this utility model that are not detailed herein are all conventional techniques known to those skilled in the art.

[0031] It should be noted that the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] The scope of protection of this utility model is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A segmented uniform smoke exhaust device for a graphitization furnace, comprising a smoke exhaust hood (1), wherein the smoke exhaust hood (1) is composed of a frame (2) and a cover plate (3), and end sealing plates (4) are respectively provided at both ends of the smoke exhaust hood (1); characterized in that: The smoke hood (1) includes a left smoke hood (1.1) and a right smoke hood (1.2), and the two smoke hoods are independent of each other. Each smoke hood is provided with a main smoke hood (6) and two smoke hoods (5). One end of the main smoke hood (6) is connected to the two smoke hoods (5) through a T-connector, and the other end is fixed on the corresponding smoke hood and extends out of the corresponding smoke hood. The bottom of the smoke hood (5) has a plurality of wedge-shaped slots (10) arranged at equal intervals along its length.

2. The segmented uniform exhaust device for a graphitization furnace according to claim 1, characterized in that: The main exhaust pipe (6) is located in the middle of each exhaust hood section, and the two exhaust pipe sections (5) are symmetrically arranged on the left and right sides relative to the main exhaust pipe (6).

3. The segmented uniform exhaust device for a graphitization furnace according to claim 2, characterized in that: The height of the wedge-shaped slot (10) gradually increases from the end closest to the exhaust manifold (6) toward the end furthest from the exhaust manifold (6).

4. The segmented uniform exhaust device for a graphitization furnace according to claim 1, characterized in that: Each exhaust manifold (6) is equipped with an exhaust regulating valve (12) at one end outside the exhaust hood (1) to balance the exhaust volume of the left exhaust hood (1.1) and the right exhaust hood (1.2).

5. The segmented uniform exhaust device for a graphitization furnace according to claim 4, characterized in that: Each exhaust manifold (6) is connected to the underground flue via a reducing pipe (13). The reducing pipe (13) is located below the corresponding exhaust regulating valve (12), and its inlet pipe diameter is larger than that of the underground flue pipe, forming a fastening structure without connectors.

6. The segmented uniform exhaust device for a graphitization furnace according to claim 5, characterized in that: The joint between the reducing pipe (13) and the underground flue is filled with fiber felt (14) to achieve a seal and prevent air leakage.

7. The segmented uniform exhaust device for a graphitization furnace according to claim 1, characterized in that: The smoke hood (1) has several equally spaced, equal-height slots (11) symmetrically arranged on the lower edges of both sides.

8. The segmented uniform exhaust device for a graphitization furnace according to claim 1, characterized in that: The frame (2) of the smoke hood (1) is provided with reinforcing ribs (7) and lifting lugs (8); the area enclosed by the reinforcing ribs (7) and the frame (2) is used to fix the smoke exhaust pipe (5), and the lifting lugs (8) are used to suspend the smoke hood (1).

9. A segmented uniform exhaust device for a graphitization furnace according to claim 1, characterized in that: The smoke hood (1) has an arched cross section, and explosion vents (9) are provided on one side of the cover plate (3) at the top of the arch, corresponding to the position of each section of the smoke pipe (5).

10. A segmented uniform exhaust device for a graphitization furnace according to any one of claims 1-9, characterized in that: The length ratio of the left section smoke hood (1.1) to the right section smoke hood (1.2) is 1:1.

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