A flue gas collecting hood and a flue gas collecting device

Abstract

The utility model discloses a kind of smoke gas collecting cover and smoke gas collecting device, relate to smoke gas collecting technical field.The smoke gas collecting cover and smoke gas collecting device, including smoke collecting cover, fixed groove is set in the inside of smoke collecting cover, annular sealing ring two is inserted in fixed groove, several bolt holes are set on the inner wall of fixed groove, sealing ring two is fixed by bolt passing through bolt hole, installation groove is set on the smoke collecting cover of fixed groove inboard, support mechanism is set in installation groove, sealing ring two is supported by support mechanism.The utility model is fixed groove, bolt fixing and support mechanism by innovative design, in combination with double sealing structure, the sealing performance and stability of smoke gas collecting cover are significantly improved, effectively prevent smoke leakage, improve the service life and environmental protection effect of equipment.

Description

Technical Field

[0001] This utility model relates to the field of flue gas collection technology, and in particular to a flue gas collection hood and a flue gas collection device. Background Technology

[0002] In practical applications of electric arc furnaces, when high-temperature flue gas is discharged through the casting port, it is necessary to use a specially designed fume hood for efficient capture and transport it to subsequent processing equipment. However, due to the complexity of the working environment of electric arc furnaces, such as high temperature, high pressure and frequent operation changes, traditional fume hood designs often fail to meet the strict sealing requirements, especially in critical parts such as the casting port. For example, after prolonged high-temperature operation, the sealing materials may age or deform, leading to seal failure. This is particularly noticeable at the pouring port, where the material must withstand not only extremely high temperatures but also additional heat and physical impact from the discharge of molten material. Furthermore, under high-load operation, pressure fluctuations inside the fume hood may cause the sealing rings to loosen or fall off, further increasing the risk of flue gas leakage. These factors combined make ensuring a tight seal around the pouring port a major challenge, and any leakage will pollute the environment and may affect the health and safety of workers. Utility Model Content

[0003] To achieve the above objectives, this application provides a flue gas collection hood, including a smoke collection hood. The smoke collection hood has a fixing groove inside, and an annular sealing ring II is inserted into the fixing groove. A plurality of bolt holes are provided on the inner wall of the fixing groove, and bolts pass through the bolt holes to fix the sealing ring II. An installation groove is provided on the smoke collection hood inside the fixing groove, and a support mechanism is provided in the installation groove to support the sealing ring II.

[0004] Preferably, the support mechanism includes an annular sleeve fixed in the mounting groove, and a sealing ring one is provided on the outer side of the annular sleeve, with the sealing ring one and the sealing ring two fitting together.

[0005] Preferably, the inner side of the annular sleeve is provided with a plurality of hollow sleeves, and a retaining rod is slidably arranged inside the hollow sleeves, one end of the retaining rod being fixedly connected to the sealing ring.

[0006] Preferably, a spring is connected between the hollow sleeve and the clamping rod.

[0007] Preferably, the bottom of the smoke hood is provided with an annular cold water channel, and the cold water channel is provided with an inlet and an outlet respectively.

[0008] Preferably, a conical guide shroud is fixedly installed inside the smoke collection hood, and the lower side of the guide shroud is in contact with the upper side of the sealing ring two.

[0009] Preferably, in another aspect, this application also provides a flue gas collection device for a flue gas collection hood, including the flue gas collection hood described in any one of the above, including a flue gas pipe, the inlet of the flue gas pipe being connected to the collection hood, the outlet of the flue gas pipe being connected to a conveying pipe, the outlet of the conveying pipe being connected to the inlet of a fan, and both the flue gas pipe and the conveying pipe being installed inside a housing.

[0010] Preferably, the inside of the conveying pipe is fixedly provided with a number of fixing rings, and the inside of the fixing rings is provided with a number of parallel thin plates.

[0011] Preferably, a filter screen is fixedly disposed inside the fixing ring located inside.

[0012] Preferably, the filter screen has a multi-layer structure, including a metal filter layer, an activated carbon adsorption layer and a high-temperature resistant ceramic fiber layer arranged in sequence, for multi-stage purification of particulate matter and harmful gases in flue gas.

[0013] The present invention provides a flue gas collection hood and flue gas collection device, which, compared with the prior art, have the following advantages: 1. This utility model significantly improves the sealing performance between the fume hood and the furnace body by setting a fixing groove inside the fume hood and inserting a second annular sealing ring into the fixing groove. Several bolt holes are provided on the inner wall of the fixing groove, through which the second sealing ring is fixed, ensuring its stability and sealing performance. Furthermore, an installation groove is provided on the fume hood inside the fixing groove, and a support mechanism is installed within the installation groove, further enhancing the support force of the second sealing ring and preventing sealing failure due to high temperature or pressure changes. This design not only effectively prevents flue gas leakage but also improves the stability and reliability of the overall system.

[0014] 2. This utility model incorporates an annular sleeve in its support mechanism. A sealing ring one is positioned on the outer side of the annular sleeve, tightly fitting with a sealing ring two to form a double-layer sealing structure. Several hollow sleeves are positioned on the inner side of the annular sleeve, with a sliding clamping rod inside each hollow sleeve, connected by a spring. This ensures that the sealing ring one always maintains appropriate clamping force, guaranteeing tight contact between it and the sealing ring two. This double-sealing design not only enhances the adaptability and durability of the sealing rings but also effectively addresses sealing requirements under different working conditions, significantly reducing the risk of flue gas leakage and improving the equipment's service life and environmental performance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is an embodiment of the present utility model. Figure 1 Top view of the structure; Figure 3 The following is an embodiment of this utility model Figure 2 Schematic diagram of cross section at point AA; Figure 4 This is a cross-sectional view of the smoke collection hood structure according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the mounting groove and other structures in an embodiment of the present utility model; Figure 6 This is a top view of the annular sleeve structure according to an embodiment of the present utility model; Figure 7 This is a cross-sectional view of the hollow sleeve and other structures according to an embodiment of the present utility model; Figure 8 This is a plan view of the conveying pipeline according to an embodiment of the present utility model.

[0017] icon: 1. Smoke hood; 2. Flow deflector; 3. Mounting slot; 4. Fixing slot; 5. Cold water channel; 6. Bolt hole; 7. Ring sleeve; 8. Sealing ring one; 9. Hollow sleeve; 10. Outer shell; 11. Spring; 12. Flue gas duct; 13. Conveying duct; 14. Fan; 15. Fixing ring sleeve; 16. Thin plate; 17. Filter screen; 18. Sealing ring two; 19. Clamping rod. Detailed Implementation

[0018] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0019] Please refer to Figures 1 to 8 This utility model provides a flue gas collection hood, including a smoke collection hood 1. The smoke collection hood 1 is made of metal and has good high temperature resistance and structural strength, and is suitable for high temperature flue gas emission occasions such as electric arc furnaces.

[0020] During normal use, a mobile device can be added below the fume hood 1. The mobile device includes multiple casters with locking function to ensure that the fume hood 1 can remain stable during movement and can be quickly positioned to the required location. The mobile device also includes a hydraulic lifting device to adjust the height of the fume hood 1 to adapt to different heights of the submerged arc furnace pouring port and ensure the best sealing effect.

[0021] An annular fixing groove 4 is provided inside the smoke hood 1. An annular sealing ring 18 is inserted into the fixing groove 4 to form a sealing fit with the casting port of the electric arc furnace to prevent smoke leakage. Several bolt holes 6 are provided on the inner wall of the fixing groove 4. The sealing ring 18 is fixed inside the fixing groove 4 by bolts passing through the bolt holes 6. The bolts are located inside the bolt holes 6 and will not directly contact the electric arc furnace, thereby avoiding the problem of poor sealing caused by the bolts contacting the furnace body and further improving the sealing performance.

[0022] An installation groove 3 is provided on the smoke hood 1 inside the fixed groove 4. A support mechanism is provided in the installation groove 3 to provide support for the sealing ring 18, preventing it from deforming or falling off under high temperature or pressure changes, thereby improving the stability and sealing effect of the sealing ring 18.

[0023] like Figure 3 As shown, the support mechanism includes an annular sleeve 7 fixed in the mounting groove 3. A sealing ring 8 is provided on the outer side of the annular sleeve 7. The sealing ring 8 and the sealing ring 18 fit tightly together to form a double-layer sealing structure, which further enhances the sealing performance.

[0024] like Figure 6 As shown, the inner side of the annular sleeve 7 is provided with several hollow sleeves 9. A pressing rod 19 is slidably arranged inside the hollow sleeve 9. One end of the pressing rod 19 is fixedly connected to the sealing ring 8, and the other end extends into the hollow sleeve 9 and is connected to the hollow sleeve 9 by a spring 11. The spring 11 is a compression spring, which can provide continuous elastic pressure so that the sealing ring 8 always maintains the pressing force on the sealing ring 18, thereby maintaining a good sealing effect under different working conditions such as temperature changes and pressure fluctuations.

[0025] To prevent high temperatures from causing thermal deformation or damage to the smoke hood 1, an annular cooling water channel 5 is provided at the bottom of the smoke hood 1. The cooling water channel 5 is equipped with an inlet and an outlet. After being connected to an external water source, the bottom of the smoke hood 1 is cooled by circulating cooling water, thereby protecting the stability of the sealing ring 18 and the sealing ring 28.

[0026] A conical guide hood 2 is fixedly installed inside the smoke collection hood 1. The guide hood 2 is made of high-temperature resistant metal material. Its lower side is tightly fitted with the upper side of the sealing ring 18, which plays the role of guiding the direction of flue gas flow and enhancing the sealing performance. The design of the guide hood 2 can effectively reduce the flow resistance of flue gas and improve the flue gas collection efficiency.

[0027] On the other hand, this application also provides a flue gas collection device, including the above-mentioned flue gas collection hood and a flue gas duct 12 connected thereto.

[0028] On the other hand, this application also provides a flue gas collection device for a flue gas collection hood, including a flue gas duct 12, the inlet of the flue gas duct 12 being connected to the collection hood 1, and the outlet being connected to the conveying duct 13, the outlet of the conveying duct 13 being connected to the inlet of a fan 14, and the flue gas being conveyed to the subsequent treatment system by the fan 14. Both the flue gas duct 12 and the conveying duct 13 are installed inside the housing 10.

[0029] like Figure 3 and Figure 7 As shown, several fixed rings 15 are fixedly installed inside the conveying pipe 13. Each fixed ring 15 has multiple parallel thin plates 16 inside. These thin plates 16 are evenly distributed and are used to guide and pre-purify the flue gas, improve the uniformity of flue gas flow, reduce turbulence, and intercept large particles in the flue gas.

[0030] A filter screen 17 is also fixedly installed in the fixed ring 15 located inside the conveying pipe 13. The filter screen 17 has a multi-layer composite structure, including the following components arranged sequentially: The metal filter layer is used to intercept large dust particles, the activated carbon adsorption layer is used to adsorb organic matter and some harmful gases in the flue gas, and the high-temperature resistant ceramic fiber layer is used to continue to adsorb fine particulate matter and harmful gases in high-temperature environments, while also having good corrosion resistance and thermal stability.

[0031] The multi-layer filter structure enables multi-stage purification of particulate matter and harmful gases in flue gas, significantly improving the flue gas treatment effect and meeting environmental emission standards.

[0032] In summary, in practical applications, the high-temperature flue gas generated by the electric arc furnace is first captured by the fume hood 1, guided into the flue gas duct 12 by the guide hood 2, and then transported to the subsequent treatment system via the conveying pipe 13. During this process, the double-layer sealing structure formed by the sealing ring 1 and sealing ring 2 inside the fume hood 1, as well as the elastic clamping force provided by the support mechanism, ensures good sealing between the fume hood 1 and the pouring port, preventing flue gas leakage. At the same time, the cold water channel 5 cools the bottom of the fume hood 1 to avoid structural deformation or sealing failure due to high temperature. During the transportation process, the flue gas is guided by the thin plate 16 and filtered through the multi-stage filter screen 17, achieving effective removal of particulate matter and harmful gases. Finally, it is discharged by the fan 14, completing the entire flue gas collection and purification process.

[0033] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fume hood comprising a fume hood (1), characterized in that: The smoke hood (1) has a fixing groove (4) inside, and a ring-shaped sealing ring (18) is inserted into the fixing groove (4). Several bolt holes (6) are provided on the inner wall of the fixing groove (4). Bolts pass through the bolt holes (6) to fix the sealing ring (18). An installation groove (3) is provided on the smoke hood (1) inside the fixing groove (4). A support mechanism is provided in the installation groove (3) to support the sealing ring (18).

2. The fume hood of claim 1, wherein: The support mechanism includes an annular sleeve (7) fixed in the mounting groove (3), and a sealing ring (8) is provided on the outside of the annular sleeve (7), which fits against the sealing ring (18).

3. The fume hood of claim 2, wherein: The inner side of the annular sleeve (7) is provided with several hollow sleeves (9), and a retaining rod (19) is slidably provided inside the hollow sleeve (9). One end of the retaining rod (19) is fixedly connected to the sealing ring (8).

4. The fume hood of claim 3, wherein: A spring (11) is connected between the hollow sleeve (9) and the clamping rod (19).

5. The fume hood of claim 4, wherein: The bottom of the smoke hood (1) is provided with an annular cold water channel (5), and the cold water channel (5) is provided with an inlet and an outlet.

6. The smoke gas hood of claim 1, wherein: The smoke collection hood (1) is fixedly provided with a conical guide hood (2), and the lower side of the guide hood (2) is attached to the upper side of the sealing ring (18).

7. A fume collection device comprising the fume hood of any one of claims 1-6, characterized by: It includes a flue gas duct (12), the inlet of which is connected to a smoke hood (1), the outlet of which is connected to a conveying pipe (13), the outlet of which is connected to the inlet of a fan (14), and both the flue gas duct (12) and the conveying pipe (13) are installed inside the outer casing (10).

8. The smoke collecting device according to claim 7, wherein: The conveying pipe (13) is fixedly provided with several fixed rings (15), and the fixed rings (15) are provided with multiple parallel thin plates (16).

9. The smoke collecting device of claim 8, wherein: A filter screen (17) is fixedly installed inside the fixed ring (15) located inside.

10. The smoke collecting device of claim 9, wherein: The filter (17) has a multi-layer structure, including a metal filter layer, an activated carbon adsorption layer and a high-temperature resistant ceramic fiber layer arranged in sequence, for multi-stage purification of particulate matter and harmful gases in flue gas.

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