A blast furnace metallurgical gas purification treatment apparatus
Patent Information
- Application Number
- CN202522271323.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-28
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-10-28
AI Technical Summary
[0003]现有技术中对于冶金气体的处理存在一定的不足，例如对于气体内部烟尘颗粒的处理存在瑕疵，传统装置通过静电除尘与袋式除尘器来去除，但此方法需要对耗材进行更换，并且价格较贵，需要经过降温、预处理等多种工序才能除尘
1、该高炉冶金气体净化处理设备，通过设置曝气组件、曝气盘、水幕组件、斜喷头A、斜喷头B等结构，实现强化颗粒物捕集，气体与水位于换热器的内部进行换热，使高温气体经过换热器后降至接近常温状态，随后通过气体出管注入处理塔的内部通过离散头进行散出，随后向主管内部通入高压空气或其他气体，进而使曝气盘位于水中产生微小气泡，进行上升，烟尘气体先穿过曝气盘产生的气泡群，微小气泡包括气体中的烟尘颗粒进行上升，而换热后的水急速升温至40℃至50℃，通过液体出管注入外环管内部，经过斜喷头A与斜喷头B的喷淋后，与上升的烟尘气体相接触，对被气泡包裹的颗粒物进出冲刷，落入处理塔内部水中，起到了捕集颗粒物的效果。
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Figure CN224917824U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas purification and treatment technology, and in particular to a blast furnace metallurgical gas purification and treatment device. Background Technology
[0002] A blast furnace uses steel plates as its outer shell, lined with refractory bricks. The blast furnace body is divided into five parts from top to bottom: the throat, the body, the waist, the belly, and the hearth. Due to its excellent technical and economic indicators, simple process, large production capacity, high labor productivity, and low energy consumption, blast furnace ironmaking accounts for the vast majority of the world's total iron production. However, the blast furnace metallurgical process generates certain industrial gases, including particulate matter and other toxic gases.
[0003] Existing technologies for treating metallurgical gases have certain shortcomings. For example, they are not good at handling dust particles inside the gas. Traditional devices use electrostatic precipitators and bag filters to remove dust, but these methods require the replacement of consumables and are expensive. They also require multiple processes such as cooling and pretreatment to remove dust. Utility Model Content
[0004] To address the shortcomings of existing technologies, this invention provides a blast furnace metallurgical gas purification and treatment device, which has the advantages of enhanced particulate matter collection efficiency and water circulation to prevent sedimentation, thus solving the problems mentioned in the background technology.
[0005] This utility model provides the following technical solution: a blast furnace metallurgical gas purification and treatment device, including a treatment tower, a heat exchanger on one side of the treatment tower, a pump on one side of the heat exchanger, a sedimentation tank on the other side of the treatment tower, a gas inlet and a gas outlet pipe on the top and bottom of the heat exchanger respectively, a liquid outlet and a liquid inlet symmetrically arranged on one side of the heat exchanger, a pump inlet pipe fixedly connected between the pump and the sedimentation tank, a pump outlet pipe fixedly connected between the pump and the liquid inlet, an inclined pipe fixedly connected between the sedimentation tank and the treatment tower, an aeration assembly at the bottom of the interior of the treatment tower, a ring-shaped and uniformly arranged discrete head at the end of the gas outlet pipe above the aeration assembly, a water curtain assembly at the top of the interior of the treatment tower, and a liquid outlet pipe fixedly connected between the water curtain assembly and the liquid outlet of the heat exchanger.
[0006] Through the above structural setup, the design and cooperation of the aeration components and water curtain components can improve and enhance the capture of dust and particulate matter in the gas. After the gas is cooled by heat exchange, it enters the treatment tower through the discrete head and first passes through the bubble group generated by the aeration components. The bubble group rises with the gas, and the water curtain sprayed by the water curtain components washes the gas, causing the dust and particulate matter to fall into the water, thus improving the capture efficiency of particulate matter.
[0007] Preferably, the treatment tower and sedimentation tank are filled with water, and the water level inside the treatment tower overflows the aeration components and inclined tubes and is located below the discrete head. The aeration components include a main pipe and an aeration disc. The end of the main pipe is connected to an external air source, and the top of the main pipe is uniformly provided with aeration discs in a circular shape. The aeration discs are located around the discrete head.
[0008] With the above structural setup, air generates tiny bubbles through the aeration disc, and these tiny bubbles pass through the water surface, forming a bubble cluster above the water surface. When they come into contact with the metallurgical gas ejected from the discrete head, the large particles in the gas come into contact with the bubbles after they break, and first settle into the water inside the treatment tower.
[0009] Preferably, the water curtain assembly includes an outer ring pipe and an inner ring pipe. The outer rings of both the outer and inner ring pipes are fixedly connected to the inner wall of the treatment tower. A connecting pipe is fixedly connected between the outer and inner ring pipes, and the outer ring pipe is connected to the liquid outlet pipe.
[0010] With the above structural arrangement, the water that has exchanged heat with the metallurgical gas inside the heat exchanger flows out through the liquid outlet pipe, enters the interior of the outer ring pipe, then circulates inside the outer ring pipe, and is injected into the interior of the inner ring pipe through the connecting pipe.
[0011] Preferably, the bottom of the outer ring pipe is uniformly provided with angled nozzles A in a circular shape. The angled nozzles A are set at an angle, and the center point of the angled nozzles A intersects with the center point of the inner ring pipe. The bottom of the inner ring pipe is uniformly provided with angled nozzles B in a circular shape, and the spray direction of the angled nozzles B is in contact with the inner wall of the treatment tower.
[0012] With the above structural setup, the water inside the outer and inner ring pipes is sprayed out through the angled nozzles A and B. The water mist sprayed from the angled nozzle A gathers at the center point of the inner ring pipe, achieving all-round coverage and increasing the contact area with the gas.
[0013] This utility model has the following advantages: 1. This blast furnace metallurgical gas purification and treatment equipment, through the installation of aeration components, aeration discs, water curtain components, inclined nozzles A and B, etc., achieves enhanced particulate matter capture. Gas and water exchange heat inside the heat exchanger, causing the high-temperature gas to drop to near room temperature after passing through the heat exchanger. Then, it is injected into the treatment tower through the gas outlet pipe and dispersed through the discrete nozzle. Subsequently, high-pressure air or other gases are introduced into the main pipe, causing the aeration discs in the water to generate microbubbles that rise. The flue gas first passes through the bubble group generated by the aeration discs, and the microbubbles, including the flue gas particles in the gas, rise. The water after heat exchange is rapidly heated to 40°C to 50°C and injected into the outer ring pipe through the liquid outlet pipe. After being sprayed by inclined nozzles A and B, it comes into contact with the rising flue gas, washing away the particles wrapped in bubbles and causing them to fall into the water inside the treatment tower, thus achieving the effect of capturing particulate matter.
[0014] 2. This blast furnace metallurgical gas purification and treatment equipment, through the setting of treatment towers, heat exchangers, pumps, sedimentation tanks, and other structures, achieves water recycling. When the aeration discs work continuously, the generated bubbles can agitate the dust-laden wastewater formed by the combination of water and particulate matter, forming a slight eddy. This keeps the dust and particulate matter in the water in a suspended state, preventing them from agglomerating. The wastewater enters the interior of the sedimentation tank through inclined pipes, allowing the dust and particulate matter contained in the wastewater to settle inside the sedimentation tank. Furthermore, the pump inlet pipe is located above the side of the sedimentation tank, with the upper layer being water that can be reused after settling, thus achieving the effect of avoiding sedimentation and agglomeration and promoting water recycling. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the processing tower of this utility model; Figure 3 This is a schematic diagram of the internal aeration components of the treatment tower structure of this utility model; Figure 4 This is a schematic diagram of the water curtain component inside the treatment tower structure of this utility model.
[0016] In the diagram: 1. Treatment tower; 2. Heat exchanger; 21. Gas outlet pipe; 22. Liquid outlet pipe; 23. Discrete head; 3. Pump; 31. Pump inlet pipe; 32. Pump outlet pipe; 4. Sedimentation tank; 41. Inclined tube; 5. Aeration assembly; 51. Main pipe; 52. Aeration disc; 6. Water curtain assembly; 61. Outer ring pipe; 62. Inner ring pipe; 63. Connecting pipe; 64. Inclined nozzle A; 65. Inclined nozzle B. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] Please see Figures 1-2 A blast furnace metallurgical gas purification and treatment device includes a treatment tower 1, a heat exchanger 2 on one side of the treatment tower 1, a pump 3 on one side of the heat exchanger 2, a sedimentation tank 4 on the other side of the treatment tower 1, a gas inlet and a gas outlet pipe 21 on the top and bottom of the heat exchanger 2 respectively, a liquid outlet and a liquid inlet symmetrically arranged on one side of the heat exchanger 2, a pump inlet pipe 31 fixedly connected between the pump 3 and the sedimentation tank 4, a pump outlet pipe 32 fixedly connected between the pump 3 and the liquid inlet, an inclined pipe 41 fixedly connected between the sedimentation tank 4 and the treatment tower 1, an aeration assembly 5 at the bottom of the interior of the treatment tower 1, a ring-shaped and uniformly arranged discrete head 23 at the end of the gas outlet pipe 21 above the aeration assembly 5, a water curtain assembly 6 at the top of the interior of the treatment tower 1, and a liquid outlet pipe 22 fixedly connected between the water curtain assembly 6 and the liquid outlet of the heat exchanger 2.
[0019] In practical applications, this device improves and enhances the capture of dust and particulate matter in the gas by designing and cooperating with the aeration component 5 and the water curtain component 6. After the gas is cooled by heat exchange, it enters the treatment tower 1 through the discrete head 23 and passes through the bubble group generated by the aeration component 5. The bubble group rises with the gas, and the water curtain sprayed by the water curtain component 6 washes the gas, causing the dust and particulate matter to fall into the water, thus improving the capture efficiency of particulate matter. By coordinating the water circuits between the treatment tower 1, heat exchanger 2, pump 3, and sedimentation tank 4, the heated water is reused in the water curtain spray. The aeration component 5 aerates the accumulated water, generating a cluster of bubbles that combine with the gas to reduce dust. Furthermore, the aeration component 5 agitates the wastewater, preventing particles and dust from agglomerating. After the wastewater flows into the sedimentation tank 4, the dust and particles settle at the bottom, while the clean water is pumped back from the top through the inlet pipe 31 for reuse.
[0020] Please see Figures 1-3 Water is provided inside the treatment tower 1 and the sedimentation tank 4. The water level inside the treatment tower 1 flows over the aeration assembly 5 and the inclined tube 41 and is located below the discrete head 23. The aeration assembly 5 includes a main pipe 51 and an aeration disc 52. The end of the main pipe 51 is connected to an external air source. The top of the main pipe 51 is uniformly provided with aeration discs 52 in a circular shape. The aeration discs 52 are located around the discrete head 23.
[0021] After high-pressure air is introduced into the main pipe 51, the air generates tiny bubbles through the aeration disc 52. These tiny bubbles pass through the water surface and form a bubble cluster above the water surface. They come into contact with the metallurgical gas ejected from the discrete head 23, causing large particles in the gas to come into contact with the bubbles after they break. The large particles first settle in the water inside the treatment tower 1, while the dust and particulate matter in the remaining gas rise along with the breaking of the bubbles.
[0022] Please see Figures 1-4 The water curtain assembly 6 includes an outer ring pipe 61 and an inner ring pipe 62. The outer rings of the outer ring pipe 61 and the inner ring pipe 62 are fixedly connected to the inner wall of the treatment tower 1. A connecting pipe 63 is fixedly connected between the outer ring pipe 61 and the inner ring pipe 62. The outer ring pipe 61 is connected to the liquid outlet pipe 22.
[0023] Water that has exchanged heat with the metallurgical gas inside the heat exchanger 2 flows out through the liquid outlet pipe 22 and enters the interior of the outer ring pipe 61. It then circulates inside the outer ring pipe 61 and is injected into the interior of the inner ring pipe 62 through the connecting pipe 63.
[0024] Please see Figures 1-4 The bottom of the outer ring pipe 61 is uniformly provided with inclined nozzles A64 in a circular shape. The inclined nozzles A64 are set at an angle, and the center point of the inclined nozzles A64 intersects with the center point of the inner ring pipe 62. The bottom of the inner ring pipe 62 is uniformly provided with inclined nozzles B65 in a circular shape. The spray direction of the inclined nozzles B65 is close to the inner wall of the treatment tower 1.
[0025] Water inside the outer ring pipe 61 and the inner ring pipe 62 is sprayed out through the oblique nozzles A64 and B65. The water mist sprayed from the oblique nozzle A64 gathers at the center point of the inner ring pipe 62, achieving all-round coverage and increasing the contact area with the gas. The water mist sprayed from the oblique nozzle B65 adheres to the inner wall of the treatment tower 1 and comes into contact with the metallurgical gas near the inner wall of the treatment tower 1, achieving an all-round water curtain.
[0026] Working principle: When in use, water is continuously injected into the sedimentation tank 4. Then, the pump 3 is started. The pump 3 pumps the water in the sedimentation tank 4 into the heat exchanger 2 through the pump inlet pipe 31 and the pump outlet pipe 32. After flowing, the water flows into the outer ring pipe 61 through the liquid outlet pipe 22. Then, the water is sprayed evenly through the inclined nozzles A64 and B65. When the water accumulates at the bottom wall of the treatment tower 1, and when the water level is above the aeration component 5 but below the discrete head 23, the water in the treatment tower 1 flows into the sedimentation tank 4 through the inclined pipe 41 to realize water circulation. After pre-start, metallurgical gas is injected into the heat exchanger 2 through the gas inlet. The gas and water exchange heat inside the heat exchanger 2, causing the high-temperature gas to drop to near room temperature after passing through the heat exchanger 2. Then, it is injected into the treatment tower 1 through the gas outlet pipe 21 and dispersed through the discrete head 23. Subsequently, high-pressure air or other gases are introduced into the main pipe 51, which causes the aeration disc 52 to generate tiny bubbles in the water and rise. The flue gas first passes through the bubble group generated by the aeration disc 52. The tiny bubbles, including the flue gas particles in the gas, rise, while the water after heat exchange rapidly heats up to 40°C to 50°C. It is injected into the outer ring pipe 61 through the liquid outlet pipe 22. After being sprayed by the inclined nozzles A64 and B65, it comes into contact with the rising flue gas, washing away the particles wrapped in the bubbles and causing them to fall into the water inside the treatment tower 1, thus capturing the particles in the flue gas. The combination of the water curtain sprayed by the water curtain component 6 and the bubble group formed by the aeration component 5 improves the capture efficiency. Furthermore, when the aeration disc 52 is working continuously, the bubbles generated can agitate the dusty wastewater formed by the combination of water and particulate matter, creating a slight eddy. This keeps the dust and particulate matter in the water in a suspended state, preventing them from clumping. The wastewater enters the sedimentation tank 4 through the inclined pipe 41, causing the dust and particulate matter in the wastewater to settle inside the sedimentation tank 4. The pump inlet pipe 31 is located above the side of the sedimentation tank 4, with the upper layer being water that can be reused after settling, thus achieving water recycling.
Claims
1. A blast furnace metallurgical gas purification and treatment device, comprising a treatment tower (1), characterized in that: A heat exchanger (2) is provided on one side of the treatment tower (1), a pump (3) is provided on one side of the heat exchanger (2), and a sedimentation tank (4) is provided on the other side of the treatment tower (1). A gas inlet and a gas outlet pipe (21) are provided at the top and bottom of the heat exchanger (2), respectively. A liquid outlet and a liquid inlet are symmetrically provided on one side of the heat exchanger (2). A pump inlet pipe (31) is fixedly connected between the pump (3) and the sedimentation tank (4). A pump outlet pipe (32) is fixedly connected between the pump (3) and the liquid inlet. An inclined pipe (41) is fixedly connected between the sedimentation tank (4) and the treatment tower (1). An aeration assembly (5) is provided at the bottom of the interior of the treatment tower (1). A discrete head (23) is uniformly provided in a circular shape above the aeration assembly (5) at the end of the gas outlet pipe (21). A water curtain assembly (6) is provided at the top of the interior of the treatment tower (1). A liquid outlet pipe (22) is fixedly connected between the water curtain assembly (6) and the liquid outlet of the heat exchanger (2).
2. The blast furnace metallurgical gas purification and treatment equipment according to claim 1, characterized in that: The treatment tower (1) and sedimentation tank (4) are filled with water. The horizontal plane inside the treatment tower (1) overflows the aeration assembly (5) and the inclined tube (41) and is located below the discrete head (23). The aeration assembly (5) includes a main pipe (51) and an aeration disc (52). The end of the main pipe (51) is connected to an external air source. The top of the main pipe (51) is uniformly provided with aeration discs (52) in a circular shape. The aeration discs (52) are located around the discrete head (23).
3. The blast furnace metallurgical gas purification and treatment equipment according to claim 2, characterized in that: The water curtain assembly (6) includes an outer ring pipe (61) and an inner ring pipe (62). The outer ring of both the outer ring pipe (61) and the inner ring pipe (62) is fixedly connected to the inner wall of the treatment tower (1). A connecting pipe (63) is fixedly connected between the outer ring pipe (61) and the inner ring pipe (62). The outer ring pipe (61) is connected to the liquid outlet pipe (22).
4. The blast furnace metallurgical gas purification and treatment equipment according to claim 3, characterized in that: The bottom of the outer ring pipe (61) is uniformly provided with inclined nozzles A (64) in a circular shape. The inclined nozzles A (64) are set at an angle, and the center point of the inclined nozzles A (64) intersects with the center point of the inner ring pipe (62). The bottom of the inner ring pipe (62) is uniformly provided with inclined nozzles B (65) in a circular shape. The spray direction of the inclined nozzles B (65) is close to the inner wall of the treatment tower (1).