A device for reducing CO concentration in sintering flue gas

Abstract

This application discloses a device for reducing CO concentration in sintering flue gas, including a trolley track and a sintering trolley. The sintering trolley is mounted on the trolley track, and a pair of supports are installed on both sides of the trolley track. A perforated ventilation component is installed on the pair of supports. The perforated ventilation component includes a perforated roller, with a support shaft at its center. A pair of bearings are installed on the pair of supports, and the two ends of the support shaft are movably mounted on the pair of bearings via a pair of journals. The perforated roller is located above the sintering trolley. This application relates to the field of heating equipment. By using the checkerboard-like staggered perforated nails of the perforated ventilation component, the permeability of the sintering material layer is effectively improved, promoting oxygen penetration and complete fuel combustion. No independent power unit is required; the roller rotation is driven by the movement of the trolley, which is energy-saving and environmentally friendly. It can adapt to different material layer thicknesses and hardnesses, improving equipment adaptability and safety, and achieving efficient and stable sintering flue gas treatment.

Description

Technical Field

[0001] This application relates to the field of heating equipment technology, and in particular to a device for reducing the CO concentration in sintering flue gas. Background Technology

[0002] With the development of the national steel industry, belt sintering machines have been widely installed in steel companies. Simultaneously, to increase sinter production, thick-layer and ultra-thick-layer sintering technologies are constantly being innovated and improved, increasing production efficiency, achieving economic benefits for enterprises, and reducing production costs. However, the implementation of thick-layer and ultra-thick-layer technologies has led to significant crusting on the material layer surface, reduced permeability, incomplete fuel combustion, and a significant increase in CO content in the sintering flue gas.

[0003] Existing technologies include sintering flue gas recirculation technology, which can effectively reduce the CO concentration in the sintering head flue gas; steam injection technology on the material surface has a limited effect on reducing CO concentration, while wasting a large amount of steam and increasing the operating costs of enterprises; oxygen-enriched combustion technology for sintering is generally only used in the ignition zone, and few enterprises can provide oxygen in most of the sintering material surface area, making it impossible for enterprises to bear the high operating costs; CO catalytic conversion technology for sintering flue gas is an emerging technology, with unstable operation and heavy metals in the catalyst, resulting in very high operating costs and putting enormous pressure on the production and operation of enterprises.

[0004] However, the above four types of CO treatment technologies for sintering flue gas are all end-of-pipe treatment technologies, which are relatively passive and costly treatment measures taken after a large amount of CO is generated. In the pretreatment process, increasing the contact area between air and sintering materials is undoubtedly an efficient and simple method. However, as disclosed in patent number CN201407897Y, a detachable double-layer loosening device for sintering increases the air permeability of materials through the form of insertion holes. However, it requires a hydraulic device or an electric telescopic device as a power source. Therefore, it is not only very complex in terms of layout and spatial structure, but also consumes more energy. In view of the above problems, this case was developed. Summary of the Invention

[0005] This application provides a device for reducing the CO concentration in sintering flue gas, including a trolley track and a sintering trolley. The sintering trolley is mounted on the trolley track, and a pair of brackets are installed on both sides of the trolley track. Perforated ventilation components are installed on the pair of brackets. The perforated ventilation assembly includes a perforated roller, a support shaft is provided at the center of the perforated roller, a pair of bearings are provided on a pair of brackets, and the two ends of the support shaft are movably mounted on the pair of bearings through a pair of journals. The perforated roller is located above the sintering trolley. The perforated ventilation component also includes a number of perforating nails, which are evenly distributed on the perforating roller and arranged in a checkerboard pattern. The punching roller is provided with a telescopic adjustment component, which is used to adjust the length of the punching nail extending out of the outer wall of the punching roller. The punch nail is equipped with a pre-pressure adjustment component.

[0006] Preferably, there are multiple sintering trolleys, and adjacent pairs of sintering trolleys are connected by connecting rods and pass under the perforated roller in sequence.

[0007] Preferably, the punching roller is a hollow cylindrical body, and a pair of end plates are connected to both ends of the punching roller by flanges.

[0008] Preferably, a pair of bearing caps are installed on the pair of bearing bushes, and the pair of bearing caps are separately connected to the pair of bearing bushes by bolts.

[0009] Preferably, a pair of limiting flanges and a pair of bearing bushes are provided at both ends of the pair of journals.

[0010] Preferably, the pre-pressure adjustment component includes a slot, and the punching pin consists of a tapered plug and a sleeve that encloses the slot. The sleeve has a slot, and an avoidance spring is installed in the slot. A push piston is connected to the avoidance spring to adjust the initial pressure.

[0011] Preferably, the push piston has a threaded hole at its center, and the sleeve is movably mounted with an adjusting bolt relative to the tail end of the plug, which is threadedly connected to the push piston.

[0012] Preferably, the telescopic adjustment assembly includes several spokes, the perforated roller and the support shaft are connected by several pairs of spokes, the several pairs of spokes are radially arranged corresponding to several perforated nails, the bottoms of several perforated nails on the same radial direction are horizontally connected by an adjustment plate, a pair of guide grooves are provided on a pair of spokes on the same radial direction, and a pair of guide blocks are provided at both ends of the adjustment plate and assembled on a pair of guide grooves.

[0013] Preferably, an adjusting screw is provided in the guide groove, and an adjusting knob is connected to the end of the adjusting screw. The guide block is threadedly connected to the adjusting screw.

[0014] Preferably, both of the brackets are triangular structures, with a pair of grounding plates at the bottom of the bracket and a pair of telescopic adjusters on the two intersecting rods of the bracket.

[0015] In a first aspect of this application, a safe, efficient, and adjustable-depth perforation device for perforating and venting sintered material surfaces is provided. The perforation and venting components improve the penetration of oxygen in the air into the sintered material layer, thereby increasing the combustion efficiency of the fuel. This solves the problem of high CO concentration and large emissions in the flue gas of traditional thick-layer sintering. Furthermore, the movement of the sintering trolley drives the drum in the device to rotate, eliminating the need for an independent power unit, making it more energy-efficient and environmentally friendly. In a second aspect of the embodiments of this application, the telescopic adjustment component can be used to quickly adjust the telescopic extension of multiple large-hole needles on the same radial plane, thereby matching different material drilling depths. In addition, the height of the support can be adjusted in conjunction with the telescopic adjuster, and the overall height of the drilling equipment can be adjusted according to the height of the trolley. In a third aspect of the embodiments of this application, an initial pre-pressure is provided to the punch nail by a pre-pressure adjustment component, so that it can be inserted below the material surface. At the same time, the punch nail can retract when encountering large pieces of material, so as to avoid wear on the conical head and cause the equipment to tip over. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present utility model; Figure 2 This is a side view of an embodiment of the present utility model. Figure 3 This is a partial cross-sectional view of an embodiment of the present utility model; Figure 4 This is an embodiment of the present utility model. Figure 1 A partial sectional view of the structure at point A; Figure 5 This is an embodiment of the present utility model. Figure 3 A magnified view of the structure at point B; In the diagram: 1. Trolley track; 2. Sintering trolley; 3. Support; 4. Drilling and ventilation assembly; 5. Telescopic adjustment assembly; 6. Pre-pressure adjustment assembly; 7. Telescopic adjuster; 41. Drilling roller; 42. Support shaft; 43. Bearing bush; 44. Journal; 45. Drilling pin; 46. End plate; 47. Bearing cover; 48. Limiting flange; 49. Spoke; 51. Adjusting plate; 52. Guide groove; 53. Guide block; 54. Adjusting screw; 55. Adjusting knob; 61. Slot; 62. Avoidance spring; 63. Push piston; 64. Adjusting bolt. Detailed Implementation

[0017] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0018] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof 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 a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0019] According to the instruction manual Figure 1-5 As can be seen, this application discloses a device for reducing the CO concentration in sintering flue gas, used in a belt sintering machine. Specifically, it includes a trolley track 1 and a sintering trolley 2. The sintering trolley 2 is mounted on the trolley track 1. A pair of supports 3 are installed on both sides of the trolley track 1. The supports 3 adopt a triangular frame structure and are equipped with grounding plates at the bottom to ensure the stability of the equipment. Telescopic adjusters 7 are provided between the cross members. The telescopic adjusters 7 adopt a threaded structure to adjust the length of the cross members, so that the top of the supports 3 can be raised or lowered to adapt to trolleys of different heights and achieve precise matching between the equipment and the production line. A perforated ventilation component 4 is installed on the pair of supports 3. The perforated ventilation component 4 performs a perforation operation on the material on the passing sintering trolley 2 to increase the air permeability of the sintering material.

[0020] The perforated ventilation component 4 includes a perforated roller 41, a support shaft 42 is provided at the center of the perforated roller 41, the perforated roller 41 and the support shaft 42 are connected by several pairs of spokes 49, a pair of bearings 43 are provided on a pair of brackets 3, and the two ends of the support shaft 42 are movably mounted on the pair of bearings 43 through a pair of journals 44, forming a waterwheel-like structure so that the perforated roller 41 is located above the sintering trolley 2; Furthermore, there are multiple sintering trolleys 2, and adjacent pairs of sintering trolleys 2 are connected by connecting rods and pass under the perforated roller 41 in sequence to achieve continuous production operation.

[0021] Furthermore, bearing caps 47 are added to the bearing bush 43 and journal 44, and convenient disassembly and maintenance are achieved by bolting the separate connection. A limiting flange 48 is provided at the end of the journal 44 to prevent axial movement and ensure the rotational stability of the punching roller 41. The punching roller 41 is a hollow cylindrical body, and the two ends are connected to the end plate 46 by flanges, which not only reduces the weight and protects the internal structure from contamination, but also facilitates the maintenance of internal components.

[0022] The perforated ventilation component 4 also includes several perforated nails 45, which are evenly distributed on the perforated roller 41. The perforated nails 45 are arranged in a checkerboard pattern. This arrangement makes the perforated nails 45 of adjacent radial sections staggered in the circumferential direction, forming a discontinuous arrangement, which increases the ventilation area of ​​the material surface and avoids local stress concentration, thus improving the uniformity of perforation. A telescopic adjustment assembly 5 is provided on the punching roller 41. The telescopic adjustment assembly 5 is used to adjust the length of the punch nail 45 extending out of the outer wall of the punching roller 41. The telescopic adjustment assembly 5 consists of spokes 49, an adjustment plate 51, a guide groove 52 and an adjustment screw 54. The spokes 49 are radially distributed. The adjustment plate 51 is laterally connected to the bottom of the radially connected punch nail 45. The guide groove 52 has an adjustment screw 54 inside. By rotating the adjustment knob 55, the screw is driven to rotate, thereby driving the guide block 53 to move along the guide groove 52. This causes the guide block to drive the adjustment plate 51 to achieve radial displacement of the punching roller 41, thereby accurately controlling the extension length of the punch nail 45.

[0023] The punch nail 45 is equipped with a pre-pressure adjustment component 6, including a slot 61. The punch nail 45 consists of a conical plug and a tubular sleeve. The slot 61 inside the sleeve is fitted with a relief spring 62. The spring pushes the piston 63 to provide initial pre-pressure, so that the punch nail 45 maintains stable penetration force when inserted into the material surface. The push piston 63 has a threaded hole in the center, and an adjusting bolt 64 is movably installed at the tail end of the sleeve. By rotating the adjusting bolt 64, the adjusting bolt 64 is engaged with the push piston 63. By pre-pressing the relief spring 62 by the push piston 63, the compression amount of the relief spring 62 can be adjusted, thereby adjusting the pre-pressure to adapt to different material layers of hardness and punching depth. At the same time, when large pieces of material or hard impurities are present, the conical plug retracts into the slot 61 to achieve guided retraction, avoiding damage to the punch nail 45 and the equipment.

[0024] Example: When the sintering trolley 2 runs along the trolley track 1 to the bottom of the punching drum 41, the trolley moves and the punching nails 45 penetrate the material surface as the drum rotates. The thrust generated by the material movement pushes the punching drum 41 to rotate around the support shaft 42, so that the punching nails 45 at the rear are successively inserted below the material surface. The telescopic adjustment component 5 adjusts the extension length of the punching nails 45 in advance according to the thickness of the material layer by adjusting the screw 54 and the guide block 53. The pre-pressure adjustment component 6 automatically retracts and avoids the punching nails 45 when they encounter large pieces of material through the synergistic action of the avoidance spring 62 and the adjusting bolt 64, so as to avoid damage to the equipment. After punching is completed, the punching nails 45 are removed from the material surface under the rotation of the drum, completing the ventilation punching operation. The cycle is repeated to achieve continuous punching and ventilation.

[0025] This device effectively improves the permeability of the sintering material layer by using perforated and breathable components 4 with checkerboard-style staggered perforated nails 45, promoting oxygen penetration and complete fuel combustion, thereby reducing the CO concentration in the flue gas from the source. It does not require an independent power unit, but uses the movement of a trolley to drive the drum rotation, which is energy-saving and environmentally friendly. The telescopic adjustment and pre-pressure adjustment components 6 work together to adapt to different material layer thicknesses and hardnesses, improving the adaptability and safety of the equipment, and achieving efficient and stable sintering flue gas treatment.

[0026] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0027] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has 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 embodiments of this application.

[0028] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0029] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A device for reducing the CO concentration in sintering flue gas, comprising a trolley track and a sintering trolley, wherein the sintering trolley is mounted on the trolley track, characterized in that, A pair of brackets are installed on both sides of the trolley track, and perforated ventilation components are installed on the pair of brackets. The perforated ventilation assembly includes a perforated roller, a support shaft is provided at the center of the perforated roller, a pair of bearings are provided on a pair of brackets, and the two ends of the support shaft are movably mounted on the pair of bearings through a pair of journals. The perforated roller is located above the sintering trolley. The perforated ventilation component also includes a number of perforating nails, which are evenly distributed on the perforating roller and arranged in a checkerboard pattern. The punching roller is provided with a telescopic adjustment component, which is used to adjust the length of the punching nail extending out of the outer wall of the punching roller. The punch nail is equipped with a pre-pressure adjustment component.

2. The device for reducing CO concentration in sintering flue gas according to claim 1, characterized in that, There are multiple sintering trolleys, and adjacent pairs of sintering trolleys are connected by connecting rods and pass under the perforating roller in sequence.

3. The device for reducing CO concentration in sintering flue gas according to claim 2, characterized in that, The punching roller is a hollow cylindrical body, and a pair of end plates are connected to both ends of the punching roller by flanges.

4. The device for reducing CO concentration in sintering flue gas according to claim 3, characterized in that, A pair of bearing caps are installed on the pair of bearing bushes, and the pair of bearing caps are separately connected to the pair of bearing bushes by bolts.

5. The device for reducing CO concentration in sintering flue gas according to claim 4, characterized in that, A pair of limiting flanges and a pair of bearing bushes are provided at both ends of the pair of journals for axial limiting.

6. The device for reducing CO concentration in sintering flue gas according to claim 5, characterized in that, The pre-pressure adjustment assembly includes a slot, and the punching pin consists of a tapered plug and a sleeve that encloses the slot. The sleeve has a slot, and a relief spring is installed inside the slot. A push piston is connected to the relief spring to adjust the initial pressure.

7. The device for reducing CO concentration in sintering flue gas according to claim 6, characterized in that, The push piston has a threaded hole in the center, and the sleeve is movably installed with an adjusting bolt relative to the tail end of the plug, which is threadedly connected to the push piston.

8. The device for reducing CO concentration in sintering flue gas according to claim 7, characterized in that, The telescopic adjustment assembly includes several spokes. The perforated roller and the support shaft are connected by several pairs of spokes. Several pairs of spokes are radially arranged corresponding to several perforated nails. The bottoms of several perforated nails on the same radial direction are horizontally connected by an adjustment plate. A pair of guide grooves are provided on a pair of spokes on the same radial direction. A pair of guide blocks are provided at both ends of the adjustment plate and assembled on a pair of guide grooves.

9. The device for reducing CO concentration in sintering flue gas according to claim 8, characterized in that, An adjusting screw is provided in the guide groove, and an adjusting knob is connected to the end of the adjusting screw. The guide block is threadedly connected to the adjusting screw.

10. The apparatus for reducing CO concentration in sintering flue gas according to claim 9, characterized in that, Both of the brackets are triangular structures, with a pair of grounding plates at the bottom of the brackets and a pair of telescopic adjusters on the two intersecting rods of the brackets.

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