Metallurgical waste gas recycling green treatment equipment

Abstract

This invention discloses a green treatment device for the reuse of metallurgical waste gas, including a gas collecting pipe. The gas collecting pipe is fixedly connected to the exhaust port of an external metallurgical device via a sealing flange. An accelerating pipe is fixedly installed on one side of the gas collecting pipe. A heat recovery device is installed on the gas collecting pipe, and a dust collection device is connected to one side of the accelerating pipe. A conveying device is installed below the dust collection device, and the conveying device is equipped with a dust conveying pretreatment device and an iron powder collection device. The dust conveying pretreatment device includes a semi-enclosed box. This device achieves efficient recovery of waste heat from high-temperature waste gas, resulting in significant energy savings and consumption reduction. Through a heat exchange tube spirally wound on the outside of the gas collecting pipe, the heat in the waste gas is fully exchanged with the waste gas, converting it into hot water that can be directly used for production or domestic purposes, thus improving energy utilization. With real-time monitoring by a flow meter and thermometer, the heat exchange is stable and highly controllable, avoiding the waste of a large amount of heat energy caused by the direct emission of high-temperature waste gas, which is in line with the concept of green and energy-saving production.

Description

Technical Field

[0001] This invention relates to the field of metallurgical waste gas treatment technology, specifically to a green treatment device for the reuse of metallurgical waste gas. Background Technology

[0002] Traditional metallurgical waste gas treatment methods often employ single dust removal or cooling approaches, resulting in significant energy losses due to unrecovered waste heat. Dust and iron powder are collected together, leading to low recovery rates. Scrapers and iron removal mechanisms are prone to material jamming and difficult to clean, resulting in poor equipment continuity. Furthermore, the waste gas treatment processes are fragmented, require large land areas, and are complex to maintain, making it impossible to achieve integrated operations of waste heat utilization, dust collection, and iron powder separation. This fails to meet the requirements of green, low-carbon, and energy-efficient production. Therefore, a green treatment equipment for the reuse of metallurgical waste gas is proposed. Summary of the Invention

[0003] To address the above problems, this invention provides a green treatment device for the reuse of metallurgical waste gas.

[0004] To achieve the above objectives, the present invention specifically adopts the following technical solution: A green treatment device for the reuse of metallurgical waste gas includes a gas collection pipe, which is fixedly connected to the exhaust port of the external metallurgical device through a sealing flange. An acceleration pipe is fixedly installed on one side of the gas collection pipe, and a heat recovery device is provided on the gas collection pipe. A dust collection device is connected to one side of the acceleration pipe, and a conveying device is installed below the dust collection device. The conveying device is equipped with a dust conveying pretreatment device and an iron powder collection device. Preferably, the dust conveying pretreatment device includes a semi-enclosed box, a turbulence ramp is fixedly installed inside the semi-enclosed box, a first pre-hanging plate and a second pre-scraping plate are fixedly installed on one side of the turbulence ramp, and a hard scraper is fixedly installed on the outside of the semi-enclosed box. Preferably, the iron powder collecting device includes a push rod and an electromagnetic separator. Support side plates and support plates are installed on both sides of the conveying device. The support side plates are fixedly installed on the conveying device, and the support plates are fixedly installed on the ground. A slide rod is fixedly installed between the support side plates and the support plates. A magnet fixing plate is slidably installed on the slide rod. An electromagnetic separator is fixedly installed on the magnet fixing plate. One end of the push rod piston rod is fixedly connected to the mounting plate.

[0005] Preferably, the upper surface of the semi-enclosed box has a through-hole for air outlet, and one side of the semi-enclosed box has a discharge port. A hard scraper is fixedly installed on the side of the semi-enclosed box near the discharge port.

[0006] Preferably, the first pre-hanging plate and the second pre-scraping plate are both fixedly connected to the upper surface of the inner side of the semi-enclosed box. After the first pre-hanging plate is installed, the distance between its bottom end and the upper surface of the conveying device is 50cm-80cm. After the second pre-scraping plate is installed, the distance between its bottom end and the upper surface of the conveying device is 20-50cm. After the hard scraper is installed, the distance between its bottom end and the upper surface of the conveying device is 2cm-20cm.

[0007] Preferably, a mounting plate is fixedly installed on one side of the support side plate, and a bracket is fixedly installed between the lower surface of the mounting plate and one side of the conveying device, and the push rod is fixedly installed on the mounting plate.

[0008] Preferably, the length of the slide bar is twice the width of the electromagnetic separator, and a recycling box is placed on one side of the conveying device, with the recycling box located directly below the slide bar.

[0009] Preferably, the heat recovery device includes a water pump and a heat exchange tube. The heat exchange tube is spirally wound around the outside of the gas collecting pipe and is in close contact with the outer side of the gas collecting pipe. One end of the heat exchange tube is provided with a water inlet pipe, and the other end of the heat exchange tube away from the water inlet pipe is provided with a water outlet pipe. The water inlet pipe is connected to the water pump outlet, and a flow meter and an insertion thermometer are fixedly installed on the water outlet pipe.

[0010] Preferably, the water pump inlet is connected to an external water supply device, and the outlet pipe is connected to an external hot water collection tank at the end furthest from the heat exchange pipe.

[0011] Preferably, the dust collection device includes a cyclone separator and a pulse bag filter. The upper side inlet of the cyclone separator is fixedly connected to the acceleration tube, and the lower end outlet of the cyclone separator is fixedly connected to the upper surface of the semi-enclosed box through a flange. A connecting pipe connects the pulse bag filter and the cyclone separator. One end of the connecting pipe is fixedly connected to the upper outlet of the cyclone separator, and the other end is fixedly connected to the air inlet of the pulse bag filter.

[0012] Preferably, a discharge pipe is fixedly connected to the discharge port of the pulse bag collector, and the end of the discharge pipe away from the pulse bag collector is fixedly connected to the semi-enclosed box. An electromagnetic ball valve is fixedly installed at the upper end of the discharge pipe.

[0013] The beneficial effects of this invention are as follows: (I) Achieving efficient recovery of waste heat from high-temperature exhaust gas, resulting in significant energy savings and reduced consumption. Through a heat exchange tube spirally wound around the outside of the gas collecting pipe, the exhaust gas undergoes thorough heat exchange, converting the heat into hot water that can be directly used for production or domestic purposes, thus improving energy efficiency. Combined with real-time monitoring by flow meters and thermometers, the heat exchange is stable and highly controllable, avoiding the significant waste of heat energy caused by the direct emission of high-temperature exhaust gas, aligning with the concept of green and energy-saving production.

[0014] (II) Dust classification and pretreatment combined with magnetic separation of iron powder results in high recovery purity. A combination of turbulence-prone inclined plates, two-stage pre-coated plates, and hard scrapers is used to spread and scrape the dust layer by layer, ensuring full exposure of the iron powder. The iron powder is then adsorbed and separated by an electromagnetic separator, significantly improving the iron powder recovery rate and purity. Material conveying is smooth and prevents accumulation or jamming, solving the problems of mixed material collection and low recovery efficiency in traditional equipment.

[0015] (III) Integrated design ensures high equipment stability and easy operation and maintenance. It integrates waste gas acceleration, cyclone dust removal, bag dust collection, waste heat recovery, iron powder separation, and conveying and discharging into one compact structure with a small footprint. All mechanisms operate in tandem, achieving a high degree of automation. The scraper, iron removal, and conveying processes do not require frequent manual cleaning, reducing labor intensity, resulting in a low equipment failure rate and a longer service life. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is the invention Figure 1 A magnified structural diagram of part A in the middle; Figure 3 This is a three-dimensional structural schematic diagram of the present invention; Figure 4 This is a partial full-section structural diagram of the present invention; Figure 5 This is the invention Figure 4 A magnified structural diagram of part B in the middle section; Figure 6 This is a structural schematic diagram of the dust conveying pretreatment device and iron powder collecting device of the present invention; Figure 7 This is a partial three-dimensional structural schematic diagram of the iron powder collecting device of the present invention.

[0017] Reference numerals: 1. Gas collecting pipe; 2. Accelerating pipe; 3. Heat recovery device; 4. Dust collecting device; 5. Dust conveying pretreatment device; 6. Iron powder collecting device; 7. Conveying device; 30. Water pump; 31. Heat exchange pipe; 32. Water inlet pipe; 33. Water outlet pipe; 34. Flow meter; 35. Insertion thermometer; 40. Hydrocyclone; 41. Pulse bag filter; 42. Solenoid ball valve; 43. Material drop pipe; 44. Connecting flange; 45. Connecting pipe; 50. Semi-enclosed box; 51. Air outlet; 52. Material outlet; 53. Turbulence ramp; 54. First pre-coating plate; 55. Second pre-scraping plate; 56. Hard scraper; 60. Support side plate; 61. Support plate; 62. Mounting plate; 63. Bracket; 64. Push rod; 65. Slide rod; 66. Magnet fixing plate; 67. Electromagnetic separator; 68. Recovery box. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0020] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0022] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0023] Example: Refer to Figures 1-7 A green treatment device for the reuse of metallurgical waste gas includes a gas collection pipe 1, which is fixedly connected to the exhaust port of the external metallurgical device through a sealing flange. An acceleration pipe 2 is fixedly installed on one side of the gas collection pipe 1. A heat recovery device 3 is provided on the gas collection pipe 1. A dust collection device 4 is connected to one side of the acceleration pipe 2. A conveying device 7 is installed below the dust collection device 4. A dust conveying pretreatment device 5 and an iron powder collection device 6 are provided on the conveying device 7. The dust conveying pretreatment device 5 includes a semi-enclosed box 50. A turbulence ramp 53 is fixedly installed inside the semi-enclosed box 50. A first pre-hanging plate 54 and a second pre-scraping plate 55 are fixedly installed on one side of the turbulence ramp 53. A hard scraper 56 is fixedly installed on the outside of the semi-enclosed box 50. The iron powder collecting device 6 includes a push rod 64 and an electromagnetic iron separator 67. The conveying device 7 has a support side plate 60 and a support plate 61 installed on both sides. The support side plate 60 is fixedly installed on the conveying device 7, and the support plate 61 is fixedly installed on the ground. A slide rod 65 is fixedly installed between the support side plate 60 and the support plate 61. A magnet fixing plate 66 is slidably installed on the slide rod 65. The electromagnetic iron separator 67 is fixedly installed on the magnet fixing plate 66. One end of the piston rod of the push rod 64 is fixedly connected to the mounting plate 62.

[0024] An air outlet 51 is provided through the upper surface of the semi-enclosed box 50, and a material outlet 52 is provided on one side of the semi-enclosed box 50. A hard scraper 56 is fixedly installed on the side of the semi-enclosed box 50 near the material outlet 52. The first pre-hanging plate 54 and the second pre-scraping plate 55 are both fixedly connected to the upper inner surface of the semi-enclosed box 50. After the first pre-hanging plate 54 is installed, the distance between its bottom end and the upper surface of the conveying device 7 is 50cm-80cm. After the second pre-scraping plate 55 is installed, the distance between its bottom end and the upper surface of the conveying device 7 is 20-50cm. After the hard scraper 56 is installed, the distance between its bottom end and the upper surface of the conveying device 7 is 2cm-20cm.

[0025] A mounting plate 62 is fixedly installed on one side of the support side plate 60. A bracket 63 is fixedly installed between the lower surface of the mounting plate 62 and one side of the conveying device 7. A push rod 64 is fixedly installed on the mounting plate 62. The length of the slide rod 65 is twice the width of the electromagnetic separator 67. A recycling box 68 is placed on one side of the conveying device 7. The recycling box 68 is located directly below the slide rod 65.

[0026] The heat recovery device 3 includes a water pump 30 and a heat exchange tube 31. The heat exchange tube 31 is spirally wound around the outside of the gas collecting pipe 1 and is in close contact with the outer side of the gas collecting pipe 1. One end of the heat exchange tube 31 is provided with a water inlet pipe 32, and the other end of the heat exchange tube 31 away from the water inlet pipe 32 is provided with a water outlet pipe 33. The water inlet pipe 32 is connected to the water outlet of the water pump 30. A flow meter 34 and an insertion thermometer 35 are fixedly installed on the water outlet pipe 33. The water inlet of the water pump 30 is connected to an external water supply device, and the other end of the water outlet pipe 33 away from the heat exchange tube 31 is connected to an external hot water collection tank.

[0027] The dust collection device 4 includes a cyclone separator 40 and a pulse bag filter 41. The upper side inlet of the cyclone separator 40 is fixedly connected to the acceleration tube 2. The lower end outlet of the cyclone separator 40 is fixedly connected to the upper surface of the semi-enclosed box 50 through a flange. A connecting pipe 45 connects the pulse bag filter 41 and the cyclone separator 40. One end of the connecting pipe 45 is fixedly connected to the upper outlet of the cyclone separator 40, and the other end is fixedly connected to the air inlet of the pulse bag filter 41. A discharge pipe 43 is fixedly connected to the discharge port of the pulse bag filter 41. The end of the discharge pipe 43 away from the pulse bag filter 41 is fixedly connected to the semi-enclosed box 50. An electromagnetic ball valve 42 is fixedly installed on the upper end of the discharge pipe 43.

[0028] Working principle: High-temperature exhaust gas containing dust and iron powder generated during the production process of external metallurgical equipment is precisely connected to the gas collection pipe 1 through a sealed flange. The acceleration pipe 2, which is fixedly installed on one side of the gas collection pipe 1, accelerates the incoming exhaust gas, so that the exhaust gas carries the dust and iron powder into the dust collection device 4 quickly.

[0029] At the same time, the heat recovery device 3, which is spirally wound and in close contact with the outside of the gas collecting pipe 1, starts to work. The water pump 30 sends external cold water from the inlet pipe 32 into the heat exchange pipe 31. The cold water continuously and fully exchanges heat with the high-temperature waste gas in the gas collecting pipe 1 in the heat exchange pipe 31. The heated hot water is discharged to the external hot water collection tank through the outlet pipe 33. The flow meter 34 and the insertion thermometer 35 on the outlet pipe 33 monitor the hot water flow and temperature in real time, which makes it easy for the staff to accurately control the heat exchange effect and realize the efficient recovery and reuse of waste heat from the waste gas.

[0030] The accelerated exhaust gas first enters the cyclone separator 40 of the dust collection device 4. The cyclone separator 40 uses centrifugal force to initially separate the heavier dust in the exhaust gas. The separated heavier dust falls directly into the semi-enclosed box 50 directly below the cyclone separator 40, while the exhaust gas containing lighter dust enters the pulse bag filter 41 through the connecting pipe 45. The pulse bag filter 41 further filters and purifies the lighter dust in the exhaust gas. The filtered dust falls into the semi-enclosed box 50 through the discharge pipe 43. The electromagnetic ball valve 42 at the upper end of the discharge pipe 43 can precisely control the opening and closing of the discharge to avoid dust accumulation and blockage.

[0031] Dust falling into the semi-enclosed box 50 lands on the conveying device 7 below and is conveyed forward by the conveying device 7. During the conveying process, the turbulence ramp 53 inside the semi-enclosed box 50 first disperses the accumulated dust to prevent clumping. Then, the first pre-coating plate 54 initially flattens the dispersed dust. Since the bottom of the first pre-coating plate 54 is 50cm-80cm away from the upper surface of the conveying device 7, the dust can be initially sorted. Next, the second pre-scraping plate 55 flattens the dust again. Its bottom is 20-50cm away from the upper surface of the conveying device 7, which further makes the dust evenly spread on the conveying surface. Finally, the hard scraper 56 on the outside of the semi-enclosed box 50, with its bottom 2cm-20cm away from the upper surface of the conveying device 7, scrapes the dust flat, ensuring that the iron powder in the dust is fully exposed, which is convenient for subsequent magnetic separation.

[0032] Meanwhile, the iron powder collection device 6 starts working. The support side plates 60 on both sides of the conveying device 7 are fixed to the conveying device 7, and the support plate 61 is fixed to the ground. The sliding rod 65 fixed between the two provides sliding support for the magnet fixing plate 66. The electromagnetic iron separator 67 on the magnet fixing plate 66 is energized to generate magnetic force. When the pre-treated dust material is conveyed to the area below the electromagnetic iron separator 67, the iron powder in the dust is accurately adsorbed onto the surface of the electromagnetic iron separator 67. The mounting plate 62 on one side of the support side plate 60 is fixed by the bracket 63. On the conveying device 7, the push rod 64 on the mounting plate 62 is used to drive the magnet fixing plate 66. When the iron powder adsorbed by the electromagnetic iron separator 67 reaches saturation, the piston rod of the push rod 64 pushes the magnet fixing plate 66 to move along the slide rod 65 towards the recycling box 68. At this time, the electromagnetic iron separator 67 is de-energized and demagnetized. After the adsorbed iron powder loses its magnetic force, it falls into the recycling box 68 located directly below the slide rod 65, completing the recycling of iron powder. The length of the slide rod 65 is twice the width of the electromagnetic iron separator 67 to ensure that the iron powder can fall accurately into the recycling box 68.

[0033] The dust material after iron powder separation continues to be conveyed by the conveying device 7 and finally discharged from the discharge port 52 on one side of the semi-enclosed box 50. The clean gas filtered and purified by the pulse bag collector 41 is discharged from the air outlet 51 on the upper surface of the semi-enclosed box 50. The whole process realizes the integrated continuous operation of waste gas collection, waste heat recovery, dust classification collection, dust pretreatment, iron powder separation, and exhaust gas and residual material discharge. It not only achieves green treatment of waste gas, but also completes the recovery and reuse of waste heat and iron powder resources.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A green treatment device for the reuse of metallurgical waste gas, comprising a gas collecting pipe (1), wherein the gas collecting pipe (1) is fixedly connected to the waste gas exhaust port of an external metallurgical device via a sealing flange, characterized in that, An acceleration pipe (2) is fixedly installed on one side of the gas collecting pipe (1). A heat recovery device (3) is provided on the gas collecting pipe (1). A dust collection device (4) is connected to one side of the acceleration pipe (2). A conveying device (7) is installed below the dust collection device (4). A dust conveying pretreatment device (5) and an iron powder collection device (6) are provided on the conveying device (7). The dust conveying pretreatment device (5) includes a semi-enclosed box (50), a turbulence ramp (53) is fixedly installed inside the semi-enclosed box (50), a first pre-hanging plate (54) and a second pre-scraping plate (55) are fixedly installed on one side of the turbulence ramp (53), and a hard scraper (56) is fixedly installed on the outside of the semi-enclosed box (50). The iron powder collecting device (6) includes a push rod (64) and an electromagnetic iron separator (67). Support side plates (60) and support plates (61) are installed on both sides of the conveying device (7). The support side plates (60) are fixedly installed on the conveying device (7), and the support plates (61) are fixedly installed on the ground. A slide rod (65) is fixedly installed between the support side plates (60) and the support plates (61). A magnet fixing plate (66) is slidably installed on the slide rod (65), and an electromagnetic iron separator (67) is fixedly installed on the magnet fixing plate (66). One end of the piston rod of the push rod (64) is fixedly connected to the mounting plate (62).

2. The green treatment equipment for metallurgical waste gas reuse according to claim 1, characterized in that, An air outlet (51) is opened through the upper surface of the semi-enclosed box (50), and a discharge port (52) is opened on one side of the semi-enclosed box (50). A hard scraper (56) is fixedly installed on the side of the semi-enclosed box (50) near the discharge port (52).

3. The green treatment equipment for metallurgical waste gas reuse according to claim 2, characterized in that, The first pre-hanging plate (54) and the second pre-scraping plate (55) are both fixedly connected to the upper surface of the inner side of the semi-enclosed box (50). After the first pre-hanging plate (54) is installed, the distance between its bottom end and the upper surface of the conveying device (7) is 50cm-80cm. After the second pre-scraping plate (55) is installed, the distance between its bottom end and the upper surface of the conveying device (7) is 20-50cm. After the hard scraper (56) is installed, the distance between its bottom end and the upper surface of the conveying device (7) is 2cm-20cm.

4. The green treatment equipment for metallurgical waste gas reuse according to claim 1, characterized in that, A mounting plate (62) is fixedly installed on one side of the support side plate (60). A bracket (63) is fixedly installed between the lower surface of the mounting plate (62) and one side of the conveying device (7). A push rod (64) is fixedly installed on the mounting plate (62).

5. The green treatment equipment for metallurgical waste gas reuse according to claim 4, characterized in that, The length of the slide bar (65) is twice the width of the electromagnetic separator (67), and a recycling box (68) is placed on one side of the conveying device (7), with the recycling box (68) located directly below the slide bar (65).

6. The green treatment equipment for metallurgical waste gas reuse according to claim 1, characterized in that, The heat recovery device (3) includes a water pump (30) and a heat exchange tube (31). The heat exchange tube (31) is spirally wound around the outside of the gas collecting pipe (1) and the heat exchange tube (31) is in close contact with the outer side of the gas collecting pipe (1). One end of the heat exchange tube (31) is provided with a water inlet pipe (32), and the other end of the heat exchange tube (31) away from the water inlet pipe (32) is provided with a water outlet pipe (33). The water inlet pipe (32) is connected to the water outlet of the water pump (30), and a flow meter (34) and an insertion thermometer (35) are fixedly installed on the water outlet pipe (33).

7. The green treatment equipment for metallurgical waste gas reuse according to claim 6, characterized in that, The water pump (30) has its inlet connected to an external water supply device, and its outlet pipe (33) is connected to an external hot water collection tank at the end away from the heat exchange pipe (31).

8. The green treatment equipment for metallurgical waste gas reuse according to claim 3, characterized in that, The dust collection device (4) includes a cyclone separator (40) and a pulse bag filter (41). The upper side inlet of the cyclone separator (40) is fixedly connected to the acceleration tube (2), and the lower end outlet of the cyclone separator (40) is fixedly connected to the upper surface of the semi-enclosed box (50) through a flange. A connecting pipe (45) is connected between the pulse bag filter (41) and the cyclone separator (40). One end of the connecting pipe (45) is fixedly connected to the upper outlet of the cyclone separator (40), and the other end is fixedly connected to the air inlet of the pulse bag filter (41).

9. The green treatment equipment for metallurgical waste gas reuse according to claim 8, characterized in that, The pulse bag collector (41) has a discharge pipe (43) fixedly connected at the discharge port. The end of the discharge pipe (43) away from the pulse bag collector (41) is fixedly connected to the semi-enclosed box (50). An electromagnetic ball valve (42) is fixedly installed at the upper end of the discharge pipe (43).

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