Dedusting coke barrier car for coke oven

Abstract

The invention relates to a dust removal coke barrier car for a coke oven. The dust removal coke barrier car comprises a car frame, a coke barrier device, a dust removal system, a walking mechanism and a walking track, the walking rail consists of a first rail of the coke barrier and a second rail of the coke barrier, and the second rail of the coke barrier is directly and fixedly connected with the ground through a concrete fixing seat; the dust removal system comprises a dust collection cover, a negative pressure pipeline and a bag-type dust remover which are connected in sequence; and a spiral-flow type spark catcher is arranged between the negative pressure pipeline and the bag-type dust remover. By optimizing the track supporting mode of the coke barrier car and a dust removal system, the equipment operation stability and the dust collection efficiency are improved; the second rail of the coke barrier car is mounted on the ground, is directly connected with the ground through a concrete fixing seat, and is matched with a guide wheel clearance control technology, so that the vibration problem of a traditional overhead rail is remarkably reduced; a dust removal system is improved, and efficient collection and purification of dust are achieved through the combined design of a telescopic dust collection cover, an elastic sealing piece and a spiral-flow type spark catcher.

Description

Technical Field

[0001] This invention relates to the field of coke oven vehicle technology, and in particular to a dust removal and coke quenching vehicle for coke ovens. Background Technology

[0002] In the coke oven production process, the dust removal and coke quenching car is a key piece of equipment, responsible for guiding the hot coke pushed out of the coke oven to the quenching car, and simultaneously collecting and treating the large amount of dust generated during the coke pushing operation. However, existing dust removal and coke quenching cars have revealed many problems after long-term use:

[0003] 1. Regarding the track system, traditional dust removal and coke blocking cars mostly adopt a double overhead track design, relying on the support to connect with the ground. Affected by the impact of coke and the vibration of equipment operation, the support is prone to resonance, resulting in track sway of up to 5-8mm. This not only affects the positioning accuracy of the equipment, but also aggravates the wear of the traveling mechanism and shortens its service life (average service life is less than 2 years).

[0004] 2. In terms of dust removal efficiency, most existing dust collection hoods are fixed structures, with a gap of 5-10mm between them and the coke oven door. The dust collection rate is only about 70%, and a large amount of dust escapes, leading to a deterioration of the working environment. In addition, sparks carried in the flue gas directly enter the bag filter, causing frequent burns of the filter bags. On average, more than 20% of the filter bags need to be replaced every month, resulting in high maintenance costs.

[0005] 3. In terms of operational stability, the guide wheel and track gap control accuracy of traditional dust removal and coke pushing cars is low (the lateral gap is often 5-8mm), which results in a maximum lateral displacement of 10mm during operation. This makes it difficult to meet the requirement of precise alignment between the coke oven door and the dust removal and coke pushing car, and coke spillage is likely to occur. Summary of the Invention

[0006] This invention provides a coke oven dust removal and quenching car. By optimizing the track support method and dust removal system of the coke oven quenching car, the stability of equipment operation and dust collection efficiency are improved. The second track of the coke oven quenching car adopts a ground-mounted installation method, which is directly connected to the ground through a concrete fixing seat. With the help of guide wheel gap control technology, the vibration problem of traditional overhead tracks is significantly reduced. The dust removal system is improved. Through the combined design of a retractable dust collection hood, elastic sealing parts and cyclone spark arrester, efficient dust collection and purification are achieved.

[0007] To achieve the above objectives, the present invention employs the following technical solution:

[0008] A coke oven dust removal and quenching car includes a frame, a coke quenching device, a dust removal system, a traveling mechanism, and a traveling track. The coke quenching device is mounted on the frame, and the traveling mechanism is installed at the bottom of the frame. The dust removal and quenching car moves along the traveling track via the traveling mechanism. The traveling track consists of a first coke quenching car rail and a second coke quenching car rail arranged in parallel. The first coke quenching car rail is close to the coke oven and is set on the coke-side operating platform, while the second coke quenching car rail is away from the coke oven and is directly fixed to the ground via a concrete fixing seat. The dust removal system includes a dust collection hood, a negative pressure pipeline, and a bag filter. The dust collection hood is located on both sides and the top of the coke quenching device. The dust collection hood is connected to the bag filter through the negative pressure pipeline, and a cyclone spark arrester is installed between the negative pressure pipeline and the bag filter.

[0009] The concrete fixing seat is made of reinforced concrete and buried at a depth of not less than 500mm underground. The top of the concrete fixing seat is equipped with a pre-embedded steel plate. The rail body of the second rail of the coke quenching car is fixed by rail fasteners, and the rail fasteners are welded to the pre-embedded steel plate.

[0010] The traveling mechanism includes a drive motor, a transmission mechanism, traveling wheels, guide rails, and guide wheels. The drive motor drives the traveling wheels to rotate through the transmission mechanism, and the guide wheels follow suit. Guide rails are provided on both sides of the second rail of the coke quenching car, and guide wheels are provided on the bottom of the car frame on the outer side of the corresponding guide rails. The guide wheels are in rolling contact with the corresponding guide rails.

[0011] The lateral gap between the guide wheel and the corresponding side of the rail body is 2-3 mm, and the longitudinal gap is 1-2 mm.

[0012] The dust collection hood is a telescopic dust collection hood, and the outer edge of the dust collection hood is provided with an elastic sealing element. The elastic sealing element is made of hydrogenated nitrile rubber with a thickness of 8-12mm and a heat resistance temperature of 150℃ or higher.

[0013] The vortex spark arrester has multiple layers of inclined guide vanes inside, with the guide vanes forming an angle of 45° to 60° with the horizontal plane, and a bottom ash hopper is provided below the guide vanes.

[0014] The vehicle frame is also equipped with a braking system; the braking system includes an electromagnetic brake and a hydraulic damper. The electromagnetic brake is interlocked with the drive motor in the running mechanism, and the hydraulic damper is installed between the bottom of the vehicle frame and the running track.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The stability of the track system has been significantly improved: The second track of the coke quenching car adopts a ground-mounted structure and is rigidly connected to the ground through a concrete fixing seat (buried depth ≥500mm). Compared with the traditional overhead support structure, the support stiffness is increased by more than 30%; the vibration amplitude during equipment operation is reduced from 2-3mm to less than 0.5mm, the service life of the traveling mechanism is extended to more than 5 years, and the equipment maintenance frequency is reduced.

[0017] 2. Dust removal efficiency and economy are both optimized:

[0018] (1) The telescopic dust collection hood is equipped with an elastic sealing component made of hydrogenated nitrile rubber. It achieves effective sealing through a precise compression of 3-5mm, increasing the dust collection rate from about 70% to over 95%, and reducing the dust concentration in the working environment to below 2mg / m³.

[0019] (2) A cyclone spark arrester is adopted, which forms a cyclone of 15-20m / s through guide vanes set at an angle of 45° to 60°. The spark extinguishing rate is over 99%, the filter bag burn rate of the bag dust collector is reduced by over 90%, and the annual maintenance cost of the bag dust collector is reduced by over 600,000 yuan.

[0020] 3. The dust removal and coke blocking car's operating precision meets high-end requirements: Through the guide wheels, the lateral gap of 2-3mm and the longitudinal gap of 1-2mm are precisely controlled, so that the lateral displacement of the dust removal and coke blocking car is ≤2mm and the positioning accuracy is within ±5mm, which fully meets the precise alignment requirements of the coke oven door and the coke blocking grid, and the coke spillage rate is reduced to below 0.1%.

[0021] 4. Overall performance is significantly superior to traditional equipment: Through structural innovation and parameter optimization, it surpasses existing dust removal and coke quenching cars in all core indicators such as track stability, dust removal efficiency, and operating accuracy, providing a more reliable, environmentally friendly, and economical equipment solution for coke oven production.

[0022] 5. The dust removal and coke oven car described in this invention has a reasonable design and compact structure, and is suitable for various top-loading coke ovens and tamping coke ovens. It can significantly improve the environmental protection and production efficiency of coke oven operations and has broad market application prospects. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the dust removal and coke blocking vehicle described in this invention.

[0024] Figure 2 This is a schematic diagram of the installation structure of the first rail of the coke-holding car described in this invention.

[0025] Figure 3 This is a schematic diagram of the installation structure of the second rail of the coke-holding car described in this invention.

[0026] In the diagram: 1. Dust removal and coke quenching car; 21. First rail of the coke quenching car; 22. Second rail of the coke quenching car; 2-1. Rail body; 3. Coke side operating platform; 4. Coke side dust removal main pipe; 5. Coke car; 61. Embedded steel plate; 62. Rubber pad; 63. Rail fastener; 7. Guide rail. Detailed Implementation

[0027] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0028] like Figure 1 As shown, the coke oven dust removal and quenching car 1 of the present invention includes a frame, a coke quenching device, a dust removal system, a traveling mechanism, and a traveling track. The coke quenching device is mounted on the frame, and the traveling mechanism is installed at the bottom of the frame. The dust removal and quenching car 1 moves along the traveling track via the traveling mechanism. The traveling track consists of a first coke quenching car track 21 and a second coke quenching car track 22 arranged in parallel. The first coke quenching car track 21 is close to the coke oven and is set on the coke-side operating platform 3, while the second coke quenching car track 22 is away from the coke oven and is directly fixed to the ground via a concrete fixing seat. The dust removal system includes a dust collection hood, a negative pressure pipeline, and a bag filter. The dust collection hood is located on both sides and the top of the coke quenching device. The dust collection hood is connected to the bag filter via a negative pressure pipeline, and a cyclone spark catcher is installed between the negative pressure pipeline and the bag filter.

[0029] like Figure 2 As shown, the concrete fixing seat is made of reinforced concrete and buried at a depth of not less than 500mm. The top of the concrete fixing seat is provided with a pre-embedded steel plate 61. The rail body 2-1 of the second rail 22 of the coke quenching car is fixed by the rail fastener 63. The rail fastener 63 is welded and fixed to the pre-embedded steel plate 61.

[0030] The traveling mechanism includes a drive motor, a transmission mechanism, traveling wheels, guide rails 7, and guide wheels. The drive motor drives the traveling wheels to rotate through the transmission mechanism, and the guide wheels follow suit. Guide rails 7 are provided on both sides of the second rail 22 of the coke quenching car, and guide wheels are provided on the bottom of the car frame on the outer side of the corresponding guide rails 7. The guide wheels are in rolling contact with the corresponding guide rails.

[0031] The lateral clearance between the guide wheel and the corresponding side of the rail body is 2-3 mm, and the longitudinal clearance is 1-2 mm. The purpose of controlling the lateral clearance is to control the limit displacement of the left and right sway of the dust removal and coke quenching car 1, and the purpose of controlling the longitudinal clearance is to control the limit displacement of the up and down vibration of the dust removal and coke quenching car 1 during travel.

[0032] The dust collection hood is a telescopic dust collection hood, and the outer edge of the dust collection hood is provided with an elastic sealing element. The elastic sealing element is made of hydrogenated nitrile rubber with a thickness of 8-12mm and a heat resistance temperature of 150℃ or higher.

[0033] The vortex spark arrester has multiple layers of inclined guide vanes inside, with the guide vanes forming an angle of 45° to 60° with the horizontal plane, and a bottom ash hopper is provided below the guide vanes.

[0034] The vehicle frame is also equipped with a braking system; the braking system includes an electromagnetic brake and a hydraulic damper. The electromagnetic brake is interlocked with the drive motor in the running mechanism, and the hydraulic damper is installed between the bottom of the vehicle frame and the running track.

[0035] The coke oven dust removal and coke quenching car described in this invention is a novel type of dust removal and coke quenching car, located between the coke oven and the coke-side dust removal main pipe 4, above the coke car 5. It combines high-stability operation with efficient dust removal, and is suitable for coke removal and dust pollution control scenarios in coke oven production in the metallurgical industry. The specific selection and optimization design ideas for each component are as follows:

[0036] 1. Frame;

[0037] The chassis, serving as the overall load-bearing foundation of the dust removal and coke tracing vehicle, adopts a welded steel structure, preferably constructed from Q345B low-alloy high-strength steel. The main frame features a box-section structure, with the connections between crossbeams and longitudinal beams reinforced by 45° diagonal bracing. The weld height is ≥8mm, and the welds undergo non-destructive testing to ensure the absence of defects such as porosity and slag inclusions. After welding, the chassis undergoes aging treatment to eliminate internal stress, ensuring no significant deformation under ambient temperatures ranging from -20℃ to 150℃. The overall load-bearing capacity is ≥50t, meeting the requirements for supporting the equipment's own weight and coke impact loads.

[0038] 2. Traveling mechanism;

[0039] (1) The drive motor is a variable frequency speed control motor, and the power is matched according to the tonnage of the equipment (usually 15 to 30 kW). The transmission mechanism adopts a hardened gear reducer with a gear meshing accuracy of 6 or above and a transmission efficiency of ≥95%. The walking wheels are preferably made of forged steel (such as 42CrMo), and the wheel surface is quenched (hardness reaches HRC55 to 60). The tread roughness Ra≤1.6μm and the contact stress with the track≤300MPa.

[0040] (2) The guide wheels are mounted on adjustable brackets on both sides of the bottom of the frame. The adjustable brackets are equipped with waist-shaped adjustment holes and are locked in place by adjusting bolts. The gap between the guide wheels and the side of the track can be precisely controlled (ensuring a lateral gap of 2-3 mm and a longitudinal gap of 1-2 mm). The rim of the guide wheels is preferably made of wear-resistant cast iron (HT300), and the axle is equipped with a self-lubricating bearing to ensure flexible rotation within the equipment operating speed range of 0-5 m / min without jamming.

[0041] 3. Running track;

[0042] (1) such as Figure 1 , Figure 2 As shown, the first rail 21 of the coke quenching car is a conventional overhead rail, preferably a QU100 lifting rail, which is fixed to the coke-side operating platform by steel brackets with a spacing of ≤3m. The rail joints are welded with a 45° bevel, and ground smooth after welding to ensure a smooth transition of the rail surface. The rail body of the first rail 21 of the coke quenching car is fixed by rail fasteners 63, which are welded and fixed to the pre-embedded steel plate 61 on the top of the coke-side operating platform.

[0043] (2) For example Figure 1 , Figure 3 As shown, the second rail 22 of the coke chock car preferably uses a 120kg / m heavy rail and adopts a ground-mounted installation structure. Specifically, the concrete fixing seat is preferably made of C30 reinforced concrete, with internal threaded steel mesh of diameter ø12mm (spacing 200mm×200mm), buried at a depth of ≥500mm, and the top is flush with the ground. The rail body 2-1 is fully welded to the pre-embedded steel plate 61 (preferably Q235 material, top plate thickness 20mm) through rail fasteners 63, with a weld length of ≥100mm and a weld leg height of ≥8mm. A concrete fixing seat is set every 2m to form a continuous rigid support structure. A rubber pad 62 is also provided between the rail body 2-1 and the pre-embedded steel plate 61 for buffering and shock absorption.

[0044] (3) The design adopts a combination of double-sided guide rails and guide wheels for guidance.

[0045] 4. Coke blocking device;

[0046] (1) The coke grid is made up of multiple grid plates (preferably high temperature resistant alloy steel plates such as 16MnCr5) spliced ​​together, with a plate thickness of more than 10mm. The surface is coated with high temperature resistant paint (temperature resistance ≥800℃). Adjacent grid plates are connected by pin shafts to ensure flexible opening and closing.

[0047] (2) The drive cylinder adopts a servo hydraulic cylinder. The cylinder diameter is matched according to the weight of the coke grid (usually 100-150mm). It is equipped with a displacement sensor (accuracy 0.1mm). The stroke closed-loop control is realized through the PLC control system. The stroke accuracy is ±1mm and the response time is ≤0.5s. It can complete the action of the coke grid from fully open to fully closed within 3-5 seconds to ensure the instantaneous guidance of coke.

[0048] 5. Dust removal system;

[0049] (1) The retractable dust collection hood is preferably made of 304 stainless steel, and the end edge is provided with an elastic seal (preferably hydrogenated nitrile rubber elastic seal). When it is in contact with the coke oven door, the compression is 3-5mm, which effectively prevents dust from overflowing.

[0050] (2) A swirling spark catcher is installed at the front end of the negative pressure pipeline. The guide vane angle is 45° to 60° and the flue gas swirling speed is 15 to 20 m / s. After the spark is extinguished by collision, it settles into the ash hopper.

[0051] (3) The preferred bag filter is a long bag low-pressure pulse bag filter with a filtration velocity ≤1.2m / min, a processing air volume ≥20000m³ / h, and a dust emission concentration ≤10mg / m³.

[0052] To more intuitively illustrate the present invention, the embodiments of the present invention will be further described in conjunction with the examples. The following examples are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technical solutions that can be obviously obtained by those skilled in the art within the scope of the technology disclosed in the present invention, including simple variations or equivalent substitutions, are all within the scope of protection of the present invention.

[0053]

Example

[0054] The main installation and operating parameters of the dust removal and coke quenching vehicle in this embodiment are as follows:

[0055] 1. Running track: The concrete fixing seat of the second rail of the coke quenching car is made of C30 reinforced concrete. The embedded steel plate is 300mm×300mm×10mm in size. The rail body is fixed by rail fasteners. The rail fasteners are fully welded to the embedded steel plate, and the weld height is ≥8mm.

[0056] 2. Traveling mechanism: The gap between the guide wheel and the guide rail is precisely adjusted. After adjustment, the lateral gap between the guide wheel and the guide rail is 2.5mm and the longitudinal gap is 1.5mm, which can ensure the smooth operation of the equipment.

[0057] 3. Dust removal system: The telescopic dust collection hood automatically extends and fits the furnace door of the carbonization chamber before coke pushing, and the compression of the elastic seal is 4mm; the bottom ash hopper of the cyclone spark collector is emptied every 8 hours to prevent ash accumulation and spontaneous combustion; the pulse cleaning cycle of the bag filter is set to 10 minutes to ensure stable filtration efficiency.

[0058] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A dust removal and coke quenching car for a coke oven, comprising a frame, a coke quenching device, a dust removal system, a traveling mechanism, and a traveling track; wherein the coke quenching device is mounted on the frame, the traveling mechanism is installed at the bottom of the frame, and the dust removal and coke quenching car moves along the traveling track via the traveling mechanism; characterized in that, The traveling track consists of a first track and a second track of the coke quenching car arranged in parallel. The first track of the coke quenching car is close to the coke oven and is set on the coke-side operating platform, while the second track of the coke quenching car is far from the coke oven and is directly fixed to the ground through a concrete fixing seat. The dust removal system includes a dust collection hood, a negative pressure pipeline, and a bag filter. The dust collection hood is located on both sides and the top of the coke quenching device. The dust collection hood is connected to the bag filter through a negative pressure pipeline, and a cyclone spark arrester is installed between the negative pressure pipeline and the bag filter.

2. The coke oven dust removal and coke quenching car according to claim 1, characterized in that, The concrete fixing seat is made of reinforced concrete and buried at a depth of not less than 500mm underground. The top of the concrete fixing seat is equipped with a pre-embedded steel plate. The rail body of the second rail of the coke quenching car is fixed by rail fasteners, and the rail fasteners are welded to the pre-embedded steel plate.

3. A dust removal and coke quenching car for a coke oven according to claim 1, characterized in that, The traveling mechanism includes a drive motor, a transmission mechanism, traveling wheels, guide rails, and guide wheels. The drive motor drives the traveling wheels to rotate through the transmission mechanism, and the guide wheels follow suit. Guide rails are provided on both sides of the second rail of the coke quenching car, and guide wheels are provided on the bottom of the car frame on the outer side of the corresponding guide rails. The guide wheels are in rolling contact with the corresponding guide rails.

4. A dust removal and coke quenching car for a coke oven according to claim 3, characterized in that, The lateral gap between the guide wheel and the corresponding side of the rail body is 2-3 mm, and the longitudinal gap is 1-2 mm.

5. A dust removal and coke quenching car for a coke oven according to claim 1, characterized in that, The dust collection hood is a telescopic dust collection hood, and the outer edge of the dust collection hood is provided with an elastic sealing element. The elastic sealing element is made of hydrogenated nitrile rubber with a thickness of 8-12mm and a heat resistance temperature of 150℃ or higher.

6. A dust removal and coke quenching car for a coke oven according to claim 1, characterized in that, The vortex spark arrester has multiple layers of inclined guide vanes inside, with the guide vanes forming an angle of 45° to 60° with the horizontal plane, and a bottom ash hopper is provided below the guide vanes.

7. A dust removal and coke quenching car for a coke oven according to claim 1, characterized in that, The vehicle frame is also equipped with a braking system; the braking system includes an electromagnetic brake and a hydraulic damper. The electromagnetic brake is interlocked with the drive motor in the running mechanism, and the hydraulic damper is installed between the bottom of the vehicle frame and the running track.

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