Converter flue gas dedusting and purifying device

Abstract

The utility model discloses a dust removal and purification device for converter flue gas, which relates to the technical field of converter gas purification and comprises a rack, a spray purification tower module is arranged on the rack and comprises a plurality of spray purification towers which are connected in series, a gas outlet end of the spray purification tower module is connected with an induced draft fan, each spray purification tower comprises a vertical tank body, and the vertical tank body is connected with a gas outlet end of the spray purification tower module. An air inlet is formed in the bottom of the vertical tank body, an air outlet is formed in the top of the vertical tank body, a spraying system is arranged in the vertical tank body, and a demisting system is further arranged in the vertical tank body and corresponds to the position under the spraying system; a gas distribution mechanism is arranged at the position of a feed port of the spraying purification tower and comprises a gas distribution disc, a gas distribution main pipe is arranged on the gas distribution disc, the gas distribution main pipe is connected with a plurality of gas distribution branch pipes, the gas distribution main pipe is connected with the gas outlet end of the gasification cooling flue, the gas distribution branch pipes are uniformly distributed around the vertical tank body, and a liquid outlet is formed in the bottom of the spraying purification tower. A sedimentation tank module is arranged under the spraying purification tower and comprises a primary sedimentation tank, a secondary sedimentation tank and a clean water tank which are connected in sequence.

Description

Technical Field

[0001] This utility model relates to the field of converter gas purification technology, and in particular to a converter flue gas dust removal and purification method.

[0002] Device. Background Technology

[0003] In the steelmaking process, the converter is an indispensable key piece of equipment, mainly used to remove impurities from molten iron and improve the quality of steel. However, the converter generates a large amount of flue gas during production, which contains a large amount of harmful substances such as dust, sulfur dioxide, and carbon monoxide. If these gases are directly emitted into the atmosphere without effective treatment, they will not only cause serious environmental pollution but also threaten human health.

[0004] Traditional methods for treating converter flue gas mainly include wet dust removal and dry dust removal. While wet dust removal has high dust removal efficiency, it suffers from problems such as high water consumption and difficulty in wastewater treatment. On the other hand, while dry dust removal saves water, its dust removal efficiency is relatively low, and the equipment is complex and has high maintenance costs. Therefore, developing a new type of converter flue gas dust removal and purification device that can both remove dust efficiently and save resources is particularly important.

[0005] Currently, although some converter flue gas dust removal and purification devices exist on the market, most of these devices suffer from problems such as low dust removal efficiency, insufficient resource recycling, and complex equipment maintenance. In particular, the design of the gas distribution mechanism and sedimentation tank module often suffers from uneven gas distribution and poor sedimentation effect, resulting in unsatisfactory purification effects and failing to meet increasingly stringent environmental protection requirements.

[0006] Therefore, in view of the shortcomings of the existing technology, this utility model proposes a new type of converter flue gas dust removal and purification device, which aims to improve the dust removal and purification efficiency, realize the recycling of resources, reduce operating costs, and meet environmental protection requirements by optimizing the design of the gas distribution mechanism and sedimentation tank module, thus providing strong support for the sustainable development of the iron and steel smelting industry. Utility Model Content

[0007] This application provides a converter flue gas dust removal and purification device, which solves the problems existing in the prior art. By setting up multiple spray purification towers connected in series, the flue gas generated by the converter can be deeply dusted and purified step by step.

[0008] To achieve the above objectives, this utility model adopts the following technical solution: a converter flue gas dust removal and purification device, including a frame, on which a spray purification tower module is installed. The spray purification tower module includes multiple spray purification towers connected in series. An induced draft fan is connected to the air outlet of the spray purification tower module. The spray purification tower includes a vertical tank, with an air inlet at the bottom and an air outlet at the top. A spray system is installed inside the vertical tank, with a spray system directly below the spray system inside the vertical tank. A demisting system is also provided at the location; an air distribution mechanism is provided at the feed inlet of the spray purification tower, the air distribution mechanism includes an air distribution plate, an air distribution main pipe is provided on the air distribution plate, the air distribution main pipe is connected to multiple air distribution branch pipes, the air distribution main pipe is connected to the air outlet of the gasification cooling flue, the air distribution branch pipes are evenly distributed around the vertical tank, a liquid outlet is provided at the bottom of the spray purification tower, and a sedimentation tank module is provided directly below the spray purification tower, the sedimentation tank module includes a primary sedimentation tank, a secondary sedimentation tank, and a clear water tank connected in sequence.

[0009] To further optimize this utility model, the following technical solutions may be preferred:

[0010] Preferably, the spraying system includes multiple layers of annular spray pipes axially arranged on the inner wall of the vertical tank, with nozzles evenly distributed on the annular spray pipes, and the water inlet end of the annular spray pipes is connected to the clear water tank in the sedimentation tank module through a liquid pump.

[0011] Preferably, the nozzles of two adjacent annular spray pipes are staggered.

[0012] Preferably, the annular spray pipe has two layers. The upper annular spray pipe is equipped with a spiral nozzle, and the lower annular spray pipe is equipped with a vortex nozzle. The spray direction of the spiral nozzle and the vortex nozzle is inclined downward, and the angle between the spray direction of the spiral nozzle and the vortex nozzle and the horizontal plane is 15-30 degrees.

[0013] Preferably, the demisting system includes a plate demister and a wire mesh demister positioned at the top of the spray purification tower along the air outlet direction. A support beam is provided inside the spray purification tower corresponding to the positions of the plate demister and the wire mesh demister. Rollers are provided on both sides of the support beam. A guide rail that cooperates with the rollers is provided inside the spray purification tower. A maintenance door is provided on the spray purification tower corresponding to the position of the support beam.

[0014] Preferably, an overflow plate is provided between the primary sedimentation tank and the secondary sedimentation tank, and an overflow plate is provided between the secondary sedimentation tank and the clear water tank.

[0015] Preferably, the air inlet of the spray purification tower module is provided with a heat exchange module, the heat exchange module includes a vertical heat exchange cylinder, a plurality of air pipes are spirally arranged inside the vertical heat exchange cylinder, a heat exchange chamber is provided inside the vertical heat exchange cylinder, and an inlet and an outlet connected to the heat exchange chamber are provided on the outer wall of the heat exchange cylinder, the inlet and the outlet are connected to a circulation pump and a water tank.

[0016] The beneficial effects of the converter flue gas dust removal and purification device disclosed in this utility model are mainly reflected in the following aspects:

[0017] (1) High-efficiency dust removal and purification: By setting up multiple interconnected spray purification towers, the flue gas generated by the converter can be deeply dusted and purified step by step. The spray system in each spray purification tower can effectively wet and capture particulate matter and pollutants in the flue gas, while the demisting system can further remove the mist generated after wetting.

[0018] (2) Uniform gas distribution improves purification effect: The gas distribution mechanism set at the feed inlet of the spray purification tower can evenly distribute the gas from the gasification cooling flue into the vertical tank through the gas distribution plate, the gas distribution main pipe and multiple evenly distributed gas distribution branch pipes, thus avoiding the problem of incomplete purification caused by excessive local concentration of flue gas and improving the overall purification effect.

[0019] (3) Resource recycling: The design of the sedimentation tank module includes a primary sedimentation tank, a secondary sedimentation tank, and a clear water tank, which can effectively treat the liquid discharged from the bottom of the spray purification tower by sedimentation and remove suspended solids and impurities. The clear water after multi-stage sedimentation can be reused in the spray system, which saves water resources and reduces operating costs.

[0020] (4) Compact structure and easy maintenance: The entire device is supported by a frame, with compact connections between modules, resulting in a small footprint and easy installation and maintenance. Meanwhile, various components such as the spray purification tower and air distribution unit are also compact.

[0021] The mechanism, sedimentation tank module, etc. can all be inspected or replaced independently, which improves the reliability of the equipment and the convenience of maintenance.

[0022] (5) Environmentally friendly and pollution-reducing: Through efficient dust removal and purification, this device can significantly reduce the pollution of converter flue gas to the environment, improve the air quality in the working area, and help protect the environment and the health of employees.

[0023] In summary, the converter flue gas dust removal and purification device of this utility model improves dust removal and purification efficiency and saves energy.

[0024] It has shown significant beneficial effects in terms of resource conservation, ease of maintenance, and environmental protection. Attached Figure Description

[0025] Figure 1 A schematic diagram of the converter flue gas dust removal and purification device;

[0026] Figure 2 This is a schematic diagram of the overall structure of the air distribution mechanism;

[0027] Figure 3 This is a schematic diagram of the internal structure of the spray purification tower;

[0028] Among them, 1-frame, 2-spray purification tower module, 3-induced draft fan, 4-primary sedimentation tank, 5-air distribution mechanism, 6-clear water tank, 7-overflow plate one, 8-overflow plate two, 9-liquid pump, 10-heat exchange chamber, 11-main air distribution pipe, 12-air distribution plate, 13-air distribution branch pipe, 14-heat exchange cylinder, 15-ring spray pipe, 16-spiral nozzle, 17-inlet, 18-outlet, 20-support beam, 21-plate demister, 22-wire mesh demister, 23-guide

[0029] Rail, 24 rollers. Detailed Implementation

[0030] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0031] Example 1:

[0032] like Figure 1-3 As shown, a converter flue gas dust removal and purification device includes a frame 1, on which a spray purification tower module 2 is mounted. The spray purification tower module includes multiple spray purification towers connected in series. An induced draft fan 3 is connected to the outlet of the spray purification tower module. Each spray purification tower includes a vertical tank with an air inlet at the bottom and an air outlet at the top. A spray system is installed inside the vertical tank.

[0033] A demisting system is also installed directly below the spray system inside the tank. An air distribution mechanism 5 is installed at the inlet of the spray purification tower. The air distribution mechanism includes an air distribution plate 12, on which an air distribution main pipe 11 is installed. The air distribution main pipe is connected to multiple air distribution branch pipes 13. The air distribution main pipe is connected to the outlet end of the gasification cooling flue. The air distribution branch pipes are evenly distributed around the vertical tank. A liquid outlet is opened at the bottom of the spray purification tower. A sedimentation tank module is installed directly below the spray purification tower. The sedimentation tank module includes a primary sedimentation tank 4, a secondary sedimentation tank 25, and a clear water tank 6 connected in sequence. The spray system includes multiple layers of annular spray pipes installed axially around the vertical tank on the inner wall of the vertical tank. Spray nozzles are evenly distributed on the annular spray pipes. The water inlet end of the annular spray pipes is connected to the clear water tank in the sedimentation tank module through a liquid pump 9. The spray nozzles of adjacent layers of annular spray pipes are staggered.

[0034] The above design scheme: (1) Improves spray coverage and purification efficiency: By installing multiple layers of annular spray pipes around the axial direction on the inner wall of the vertical tank and evenly distributing the nozzles, it can be ensured that the flue gas is in full contact with the spray droplets during the rising process, thereby greatly improving the spray coverage. This design helps to capture particulate matter and pollutants in the flue gas more comprehensively and improve the purification efficiency. (2) Optimizes nozzle layout and enhances purification effect: The nozzle positions of adjacent two layers of annular spray pipes are staggered, which can form a denser spray network. This layout not only increases the contact opportunity between the spray droplets and the flue gas, but also effectively avoids spray blind spots, further enhancing the purification effect. Especially when dealing with high-concentration or highly viscous flue gas, this design can significantly improve the purification efficiency. (3) Realizes water resource recycling: The water inlet end of the annular spray pipe is connected to the clear water tank in the sedimentation tank module through a liquid pump, which means that the clear water after sedimentation treatment can be reused in the spray system. This design not only saves water resources, but also reduces the cost of wastewater treatment, which is in line with the concept of sustainable development. (4) Improved equipment reliability and ease of maintenance: The multi-layered annular spray pipe design allows each nozzle to work independently, so even if a nozzle fails, it will not affect the operation of the entire system. In addition, since the nozzles are evenly distributed on the inner wall of the vertical tank, the maintenance and repair of the equipment are more convenient.

[0035] The annular spray pipe 15 has two layers. The upper annular spray pipe is equipped with spiral nozzles 16, and the lower annular spray pipe is equipped with vortex nozzles. The spiral and vortex nozzles are installed at an angle downwards, with an angle of 15-30 degrees between their spray direction and the horizontal plane. The demisting system includes a plate demister 21 installed at the top of the spray purification tower along the exhaust direction, and a wire mesh demister.

[0036] The spray purification tower is equipped with a demister 22 and a support beam 20 corresponding to the plate demister and wire mesh demister. Rollers 24 are installed on both sides of the support beam. The spray purification tower is equipped with a guide rail 23 that cooperates with the rollers. A maintenance door is installed on the spray purification tower at the position corresponding to the support beam.

[0037] The above structural design has the following advantages: (1) Improved spraying efficiency and purification quality: By installing two layers of annular spray pipes and configuring spiral nozzles and vortex nozzles respectively, a more complex and effective spraying mode can be formed. Spiral nozzles and vortex nozzles can not only increase the kinetic energy of the spray droplets, but also promote the full mixing and collision of droplets and flue gas, thereby improving spraying efficiency and purification quality. The spraying direction of spiral nozzles and vortex nozzles is inclined downward and forms an angle of 15-30 degrees with the horizontal plane. This design helps to ensure that the spray droplets can evenly cover the entire interior of the vertical tank, while avoiding droplets directly impacting the top of the tank, reducing droplet splashing and waste. (2) Optimized demisting effect and reduced secondary pollution: The demisting system adopts a combination of plate demister and wire mesh demister, which can more effectively remove the mist and water droplets generated after spraying and prevent them from causing secondary pollution when discharged with flue gas. Plate demisters can initially remove larger water droplets, while wire mesh demisters can further capture tiny mist droplets, ensuring that the emitted flue gas meets environmental protection standards. (3) Easy maintenance and repair: The rollers installed on both sides of the support beam and the guide rails that cooperate with the rollers allow the plate demisters and wire mesh demisters to slide along the guide rails inside the spray purification tower, making maintenance and repair convenient. This design not only improves the reliability and stability of the equipment, but also reduces maintenance costs and time. The maintenance door installed on the spray purification tower at the position corresponding to the support beam allows staff to easily enter the tower to inspect and replace the demisting system, further improving the maintainability of the equipment.

[0038] (4) Strong adaptability and improved equipment flexibility: This optimized spraying and demisting system design is not only suitable for dust removal and purification of converter flue gas, but can also be flexibly adjusted according to actual needs to adapt to different scales and types of flue gas treatment requirements. Its high efficiency, energy saving and environmental protection features make this device have broad application prospects in the fields of iron and steel smelting, chemical industry, power industry and other industries.

[0039] An overflow plate 7 is installed between the primary sedimentation tank 4 and the secondary sedimentation tank, and an overflow plate 8 is installed between the secondary sedimentation tank and the clear water tank 6. This structural design improves sedimentation efficiency and water purification. The installation of overflow plate 7 between the primary and secondary sedimentation tanks, and overflow plate 8 between the secondary sedimentation tank and the clear water tank, facilitates staged treatment of the sedimentation process. Through this step-by-step process…

[0040] Sedimentation can more effectively remove suspended solids, particulate matter and other impurities from water, improving sedimentation efficiency and water purification effect; the overflow plate design can also ensure that the water flow is evenly distributed in the sedimentation tank, avoiding water flow short circuit or local overload, thereby further improving sedimentation quality.

[0041] The spray purification tower module has a heat exchange module installed at its air inlet. This module includes a vertical heat exchange cylinder 14 with multiple spirally installed vent pipes inside. A heat exchange chamber 10 is also installed within the cylinder. An inlet 17 and an outlet 18, connected to the heat exchange chamber, are installed on the outer wall of the heat exchange cylinder 14. A circulating pump and a water tank are connected to the inlet and outlet. This structure enables heat recovery and energy saving: the newly added heat exchange module utilizes the spiral vent pipe structure within the vertical heat exchange cylinder, allowing for thorough heat exchange between the flue gas and the water in the heat exchange chamber as the gas passes through. This design not only helps reduce the flue gas temperature but also achieves effective heat recovery. Water from the tank is pumped into the heat exchange chamber for heat exchange via the circulating pump, and the heated water is then returned to the tank or used in other heat-requiring processes, achieving energy recycling and reducing energy consumption and operating costs.

[0042] Although preferred embodiments of the present invention have been described, 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 the present invention.

[0043] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A converter flue gas dedusting and purifying device comprising a rack, characterized in that: The rack is provided with a spray purification tower module, the spray purification tower module comprises a plurality of spray purification towers connected in series with each other, an air inducing fan is connected to an air outlet end of the spray purification tower module, the spray purification tower comprises a vertical tank body, an air inlet is arranged at a bottom of the vertical tank body, an air outlet is arranged at a top of the vertical tank body, a spraying system is arranged in the vertical tank body, and a demisting system is further arranged at a position corresponding to a position directly below the spraying system in the vertical tank body; a gas distribution mechanism is arranged at a position of a feed inlet of the spray purification tower, the gas distribution mechanism comprises a gas distribution disc, a gas distribution main pipe is arranged on the gas distribution disc, a plurality of gas distribution branch pipes are connected to the gas distribution main pipe, the gas distribution main pipe is connected to an air outlet end of the gasification and cooling flue, and the gas distribution branch pipes are uniformly arranged around the vertical tank body; a liquid outlet is formed at the bottom of the spray purification tower, and a sedimentation tank module is arranged directly below the spray purification tower, the sedimentation tank module comprises a primary sedimentation tank, a secondary sedimentation tank and a clean water tank which are connected in sequence.

2. A converter flue gas dedusting and purifying device according to claim 1, characterized in that: The spraying system comprises a plurality of annular spraying pipes which are arranged on an inner wall of the vertical tank body in an axial direction, the annular spraying pipes are uniformly provided with nozzles, and the water inlet end of the annular spraying pipe is connected to the clean water tank in the sedimentation tank module through a liquid pumping pump.

3. The converter flue dust removal and purification device according to claim 2, characterized in that: The nozzles of the annular spraying pipes of adjacent two layers are arranged in a staggered manner.

4. The converter flue dust removal and purification device according to claim 2, characterized in that: The annular spraying pipes are provided with two layers, the annular spraying pipe of the upper layer is provided with a spiral nozzle, the annular spraying pipe of the lower layer is provided with a vortex nozzle, the spraying directions of the spiral nozzle and the vortex nozzle are arranged in an inclined downward manner, and the included angle between the spraying directions of the spiral nozzle and the vortex nozzle and a horizontal plane is 15-30 degrees.

5. The converter flue dust removal and purification device according to claim 1, characterized in that: The demisting system comprises a plate demister and a wire mesh demister which are arranged at a position corresponding to the position of the nozzles of the annular spraying pipes in the top of the spray purification tower in an air outlet direction, support beams are arranged at positions corresponding to the plate demister and the wire mesh demister in the spray purification tower, rollers are arranged on the two side walls of the support beams, guide rails matched with the rollers are arranged in the spray purification tower, and a maintenance door is arranged at a position corresponding to the support beam on the spray purification tower.

6. The converter flue gas dust removal and purification device according to claim 1, characterized in that: overflow plates one are arranged between the primary sedimentation tank and the secondary sedimentation tank, and overflow plates two are arranged between the secondary sedimentation tank and the clean water tank.

7. The converter flue gas dust removal and purification device according to claim 1, characterized in that: a heat exchange module is arranged at an air inlet end of the spray purification tower module, the heat exchange module comprises a vertical heat exchange cylinder, a plurality of air pipes are spirally arranged in the vertical heat exchange cylinder, a heat exchange cavity is arranged in the vertical heat exchange cylinder, water inlets and outlets which are connected to the heat exchange cavity are arranged on the outer side wall of the heat exchange cylinder, and a circulating pump and a water tank are connected to the water inlets and the outlets.

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