A blast furnace slag flushing steam recovery variable diameter chimney with post-positioned spray cyclone plate

Abstract

The present application relates to a kind of blast furnace slag treatment and industrial waste gas purification technical field, especially in kind of blast furnace slag steam recovery variable-diameter chimney of spray post cyclone plate, including main cylinder, auxiliary cylinder, water pipe, branch pipe, cyclone unit, water thrower, cooling assembly, receiving assembly and drive assembly, the smaller auxiliary cylinder of smaller diameter is equipped in the upper end of main cylinder.High-temperature slag steam enters from the bottom of main cylinder, after cyclone unit cyclone disturbance, contact condensation with spray water, condensate is thrown to cylinder wall and is recycled by receiving assembly;Water thrower in auxiliary cylinder realizes depth dehydration.Cyclone unit uses deflectable inner leaf, outer leaf and elastic water-absorbing cloth, can realize impurity interception and self-cleaning;Cooling assembly is cooled by internal flow channel cooling blade and realizes cooling water cascade utilization;Drive assembly can adjust blade angle.The present application is high in gas-liquid separation efficiency, not easy to block, low in energy consumption, can effectively recycle water resources, meet blast furnace slag steam purification and standard discharge requirement.

Description

Technical Field

[0001] This invention relates to the field of blast furnace slag treatment and industrial waste gas purification technology, and particularly to a variable diameter chimney for blast furnace slag flushing steam recovery with a sprayed post-swirling plate. Background Technology

[0002] During the blast furnace ironmaking process, a large amount of high-temperature slag is generated. As a major by-product of ironmaking, the slag needs to be cooled with cold water during the slag flushing operation. This process generates a large amount of slag flushing steam at 90 to 120 degrees Celsius. The steam contains dust and liquid water droplets. Direct discharge of this steam not only wastes a lot of water resources but also causes environmental pollution and fails to meet environmental emission requirements. Therefore, it is necessary to efficiently separate and recover the impurities and moisture in the steam to ensure that the emitted gas meets the standards.

[0003] In existing technologies, such as the patent with publication number CN213610514U, a swirl plate and packing combination spray tower is disclosed. This tower contains swirl plates and a packing layer, combined with a multi-layer spray structure. The swirl plates generate centrifugal force to separate particulate matter in the exhaust gas, which is then further treated by the packing layer. However, while this technology improves some existing problems, there are still aspects that require further optimization to better meet practical needs. 1. The cyclone separator has a fixed, perforated blade structure without any design for droplet interception or collection, relying solely on centrifugal force for droplet separation. Because the inner region of the cyclone separator is close to the central blind plate, its rotation radius is small, resulting in weak centrifugal force, making it difficult to effectively throw liquid impurities in the steam towards the tower wall. Even with a relatively dense arrangement of cyclone separators, gaps still exist between the blades, allowing a large number of droplets that are not effectively thrown off to fall directly through these gaps. Furthermore, the packing layer above the cyclone separator allows the falling droplets, carrying fine particulate impurities, to adhere directly to the gaps in the packing. This not only prevents water recovery but also rapidly clogs the packing, leading to increased system pressure and a significant decrease in treatment efficiency.

[0004] 2. This device relies on multiple sets of swirl plates, multiple layers of packing, and multiple spray stages to improve the treatment effect. It is a crude design that "makes up for the effect by quantity". This not only significantly increases the manufacturing cost and the complexity of the internal structure of the tower, but also results in high water consumption and energy consumption due to the continuous operation of multiple spray stages, leading to high operating costs. At the same time, the dense internal structure will disrupt the steam rising flow field and further reduce the separation effect.

[0005] Therefore, based on the above-mentioned viewpoints, there is still room for improvement in existing slag exhaust gas purification technologies. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a variable-diameter chimney for blast furnace slag flushing steam recovery with a spray-fed post-cyclone plate, comprising a main cylinder, a secondary cylinder with its inner diameter smaller than that of the main cylinder being installed through the top of the main cylinder, a water supply pipe passing through the middle of the main cylinder, and several branch pipes being installed through the outer side of the water supply pipe, with circular grooves for installing nozzles at the bottom of the branch pipes, and further comprising: A water-spinning device is installed in the middle of the auxiliary cylinder to throw residual moisture in the steam onto its inner wall.

[0007] The swirl unit includes an inner ring and an outer ring rotatably mounted inside the main cylinder, multiple inner blades mounted on the inner ring via a rotating shaft, multiple outer blades connected to the inner blades via a linkage shaft and mounted on the outer ring, and an elastic absorbent cloth connected between two adjacent inner blades.

[0008] The two ends of the elastic absorbent cloth are connected to the upper half of one inner leaf and the lower half of the other inner leaf, respectively, so as to change the pore state of the elastic absorbent cloth when the inner leaf swings.

[0009] Preferably, in two adjacent inner leaves, the upper half of one inner leaf and the lower half of the other inner leaf are staggered and opposite to each other, so that the elastic absorbent cloth is in an obliquely extended state to intercept dust and droplets in the rising steam.

[0010] Preferably, both the inner and outer leaves are inclined downwards toward the outer ring, and the height of the outer ring is lower than that of the inner ring. The upper end of the inner ring is provided with a structural groove corresponding to the elastic absorbent cloth, which is used to guide the water squeezed out from the elastic absorbent cloth toward the outer ring.

[0011] Preferably, both the inner and outer blades are provided with cavities, and both the rotating shaft and the linkage shaft are provided with water inlet grooves.

[0012] The main cylinder is also equipped with a cooling component, which includes a vertical pipe and an upper cone. The vertical pipe is connected to the water supply pipe, and the upper cone has a flow guide groove inside. The bottom of the upper cone is rotatably connected to the top of the inner ring.

[0013] The top of the inner ring has an annular cavity, one end of the guide groove is connected to the annular cavity, the annular cavity is connected to the internal cavity of the inner blade through the water inlet groove on the rotating shaft, and the internal cavity of the inner blade is connected to the internal cavity of the outer blade through the water inlet groove on the linkage shaft, which is used to cool the inner and outer blades.

[0014] Preferably, drainage grooves are provided on the lower outer sides of the inner and outer blades, and the two ends of the drainage grooves are respectively connected to the internal cavity and the outside of the inner or outer blade.

[0015] The diameter of the drainage trough is smaller than that of the inlet trough, and it is used to discharge the cooling water after heat exchange vertically downward to the slag flushing position at the bottom of the main cylinder.

[0016] Preferably, a receiving component is installed on the inner wall of both the main cylinder and the auxiliary cylinder, and the receiving component includes an arc-shaped plate and a drain pipe.

[0017] The arc-shaped plate has an arc-shaped structure that is narrow at the bottom and wide at the top. It forms a receiving area with the inner wall of the corresponding main or auxiliary cylinder. The drain pipe is installed through the receiving area to collect and discharge the dust-laden condensate that has been thrown onto the cylinder wall by the cyclone unit or water thrower.

[0018] Preferably, the narrow opening at the lower end of the arc-shaped plate inside the main cylinder corresponds to the bottom outer edge of the vortex unit, so that all the dust-laden condensate flowing down the inner wall of the main cylinder falls into the receiving area, while isolating the clean cooling water discharged from the drainage trough.

[0019] Preferably, it further includes a drive assembly for driving the inner and outer blades to rotate and oscillate, the drive assembly comprising: The drive motor is installed at the bottom of the upper cone, and its main shaft is equipped with a rotating disk connected to the inner wall of the inner ring to drive the inner ring to rotate.

[0020] The drive disc is rotated within an annular groove inside the inner ring.

[0021] An electric push rod is installed at the bottom of the upper cone, and an arc-shaped rack is installed at its telescopic end. An internal gear ring corresponding to the arc-shaped rack is installed on the inner diameter of the drive disc.

[0022] The external gear ring is mounted on top of the drive disc.

[0023] The drive gear is fixedly sleeved on the outside of the rotating shaft and meshes with the external gear ring.

[0024] Preferably, when the electric push rod drives the arc-shaped rack to extend and mesh with the inner gear ring, the drive disk stops rotating, while the inner ring continues to rotate under the drive motor, causing the drive disk and the inner ring to rotate relative to each other. Then, through the meshing of the outer gear ring with the drive gear, the shaft is driven to rotate around its own axis, causing the inner and outer blades to swing at an angle.

[0025] Preferably, the angle of the inner and outer leaves swings to adjust the gap between adjacent inner leaves, so as to achieve composite compression drainage of the elastic absorbent cloth, or to increase its pores to restore its adsorption capacity.

[0026] In summary, this application includes at least one of the following beneficial technical effects: I. This invention effectively solves the problems of insufficient centrifugal force in the central area of ​​traditional swirl plates, steam leakage through blade gaps, and incomplete droplet separation by placing the spray structure at the rear and using a swirl unit with deflectable inner and outer blades and elastic absorbent cloth. It achieves efficient interception and gas-liquid separation of dust and liquid water in slag flushing steam, avoids impurities adhering and clogging the flow channel, and significantly improves the steam purification and dehydration effect.

[0027] Second, this invention sets up a cooling channel inside the swirl blades and uses sprayed cooling water to cool the blade body, so that it plays an auxiliary pre-condensation role during the steam rise process. At the same time, the cooling water after heat exchange is directed to the slag flushing area to achieve cascade utilization, which greatly reduces the system's water and energy consumption and improves the water resource recycling rate.

[0028] Third, this invention achieves the separation of clean water and dusty wastewater through the extrusion self-cleaning structure of adjustable-angle swirl blades and elastic absorbent cloth, combined with the cylinder wall receiving component. It can meet the treatment requirements without the need for multiple layers of packing and multiple spray sections, simplifying the internal structure of the tower, reducing manufacturing costs and operating air pressure, ensuring long-term stable and efficient operation of the system, and meeting the environmental protection emission standards of blast furnace slag flushing steam. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Figure 1 This is a schematic diagram of the structure of the main body of the present invention.

[0031] Figure 2 This is a cross-sectional structural diagram of the main body of the present invention.

[0032] Figure 3 This is a schematic diagram of the swirl unit of the present invention.

[0033] Figure 4 This is a top view of the swirl unit of the present invention.

[0034] Figure 5 This is a planar sectional view of the main body of the present invention.

[0035] Figure 6 This is a planar sectional view of the cooling component and the driving component of the present invention.

[0036] Figure 7 This is the present invention. Figure 6 Enlarged view of part of the structure at point A in the middle.

[0037] Figure 8 This is the present invention. Figure 6 Enlarged view of part of the structure at point B.

[0038] Figure 9 This is a diagram showing the fit between the inner leaf and the elastic absorbent cloth of the present invention.

[0039] In the diagram, 1. Main cylinder; 10. Secondary cylinder; 11. Water supply pipe; 12. Branch pipe; 13. Water ejector; 2. Swirl unit; 20. Support plate; 21. Lower top cone; 22. Inner ring; 23. Rotating shaft; 24. Inner blade; 25. Linkage shaft; 26. Outer ring; 27. Outer blade; 28. Elastic absorbent cloth; 29. ​​Structural groove; 3. Cooling component; 30. Vertical pipe; 31. Upper top cone; 32. Guide groove; 33. Annular cavity; 34. Water inlet groove; 35. Drainage groove; 4. Receiving component; 40. Arc plate; 41. Drain pipe; 5. Drive component; 50. Drive motor; 51. Rotating disk; 52. Drive disk; 53. External gear ring; 54. Drive gear; 55. Electric push rod; 56. Arc rack; 57. Internal gear ring. Detailed Implementation

[0040] The following combination Figures 1 to 9 The embodiments of the present invention will be described in detail below.

[0041] This application discloses a variable-diameter chimney for blast furnace slag flushing steam recovery using a spray-post swirl plate. It is used in the process of treating high-temperature, impurity-containing steam generated during blast furnace slag flushing, and can achieve efficient steam cooling, gas-liquid separation, and water resource recovery, while avoiding impurity blockage and reducing operating costs.

[0042] Example 1: Reference Figures 1 to 2 As shown, a variable diameter chimney for blast furnace slag flushing steam recovery with a sprayed post-swirling plate includes a main cylinder 1. A secondary cylinder 10 is installed at the upper end of the main cylinder 1, and the inner diameter of the secondary cylinder 10 is smaller than that of the main cylinder 1. The two are connected in a transitional manner. A water supply pipe 11 is installed in the middle of the main cylinder 1. Several branch pipes 12 are installed through the outer side of the water supply pipe 11. The bottom of the branch pipes 12 is provided with a circular groove for installing nozzles.

[0043] A vortex unit 2 is also installed in the middle of the main cylinder 1. Operators can install nozzles in the circular groove. The end of the water supply pipe 11 located outside the main cylinder 1 is connected to an external water supply device. The external water supply device supplies water at 20 degrees Celsius through the water supply pipe 11 into several branch pipes 12. Then, the water in the branch pipes 12 will be sprayed downward through the nozzles installed in the circular groove. After the high-temperature steam at 120 degrees Celsius enters from the bottom of the main cylinder 1, it passes through the vortex unit 2 and comes into contact with the low-temperature water sprayed from the circular groove. Because the temperature difference between the 20-degree water and the 120-degree steam is large, the 20-degree water can quickly cool down and condense the steam. The condensed water is mixed with dust and falls to the vortex unit 2 below due to its own weight. Then, it is thrown onto the inner wall of the main cylinder 1 by the vortex unit 2.

[0044] A water-spinning device 13 is installed in the middle of the secondary cylinder 10. Its purpose is to throw the residual water in the steam onto the inner wall. After the initial condensation, the amount of steam is reduced, and the smaller diameter of the secondary cylinder 10 increases the steam flow rate and maintains stable circulation. The water-spinning device 13 is an existing and mature device. It is equipped with fan blades, which can generate centrifugal force through rotation when the steam flows through, throwing the fine droplets of residual liquid in the steam onto the inner wall of the secondary cylinder, realizing secondary dehydration and purification. Finally, the remaining clean steam is discharged from the top of the secondary cylinder 10.

[0045] Reference Figures 2 to 5 The diagram shown is a structural schematic of the swirl unit 2 of this application. The swirl unit 2 includes a support plate 20, which is installed on the inner wall of the main cylinder 1. A lower top cone 21 is installed in the middle of the support plate 20. An inner ring 22 is rotatably installed on the top of the lower top cone 21. Several rotating shafts 23 distributed along their axis are rotatably installed inside the inner ring 22. An inner blade 24 is installed on one end of the rotating shaft 23 through its outer side.

[0046] The inner leaf 24 is equipped with a linkage shaft 25 at its end. The outer ring 26 is rotatably connected to the outer side of the linkage shaft 25. The linkage shaft 25 is rotatably connected to the outer ring 26, that is, the linkage shaft 25 is inserted into the outer ring 26. One end of the linkage shaft 25 passes through the outer wall of the outer ring 26 and is provided with an outer leaf 27.

[0047] The support plate 20 provides stable support for the lower top cone 21, and indirectly supports and limits the inner ring 22 through the lower top cone 21. Under the drive of external force, the inner ring 22 can drive the inner blade 24 to rotate around its own axis through the rotating shaft 23. At the same time, the inner blade 24 drives the outer ring 26 and the outer blade 27 to rotate in the same direction through the linkage shaft 25. The centrifugal force generated by the rotation of the blades throws the condensate outward.

[0048] In actual use, steam flows upward from the bottom of the main cylinder 1, first contacting the rotating inner blade 24 and outer blade 27. The airflow is fully agitated and dispersed, forming a vortex. Then, it passes through the gap between the inner blade 24 and outer blade 27 and enters the spray area, where it comes into full contact with the cooling water sprayed from the nozzles to achieve cooling and condensation. The condensate and unevaporated cooling water fall onto the inner blade 24 and outer blade 27 under their own weight, and are thrown into the air by centrifugal force as the blades rotate. During the dispersion process, the water droplets form a brief and sufficient reverse contact with the continuously rising steam below, further enhancing the heat exchange and condensation effect. Afterward, the water droplets fall back onto the inner wall of the main cylinder 1 and are collected along the wall surface, thereby significantly improving the condensation and dehydration efficiency of the steam.

[0049] Meanwhile, under the drive of external force, the rotating shaft 23 can drive the inner blade 24 to swing synchronously. The inner blade 24 drives the outer blade 27 to swing synchronously through the linkage shaft 25, so as to achieve coordinated adjustment of the deflection angle of the inner blade 24 and the outer blade 27. By rotating the rotating shaft 23 to adjust the blade angle, the flow gap between the blades and the steam swirl intensity can be changed to adapt to different steam flow conditions.

[0050] Reference Figures 5 to 8 As shown, a cooling component 3 for cooling the inner leaf 24 and the outer leaf 27 is installed between the water supply pipe 11 and the inner ring 22.

[0051] Specifically, the cooling component 3 includes a vertical pipe 30, which is installed through the bottom of the water supply pipe 11. An upper cone 31 is installed at the bottom of the vertical pipe 30. The bottom of the upper cone 31 is rotatably connected to the top of the inner ring 22. Several guide grooves 32 are evenly distributed along its axis inside the upper cone 31. One end of the guide groove 32 is connected to the outer wall of its bottom. An annular cavity 33 corresponding to the bottom of the guide groove 32 is opened at the top of the inner ring 22, and one end of the rotating shaft 23 is located in the annular cavity 33. The inner blade 24 and the outer blade 27 are both hollow inside. The rotating shaft 23 and the linkage shaft 25 are both provided with water inlet grooves 34 that are connected to the outer walls of their two ends. The water inlet groove 34 on the rotating shaft 23 connects the annular cavity 33 and the inner blade 24. The water inlet groove 34 in the linkage shaft 25 connects the internal cavities of the inner blade 24 and the outer blade 27.

[0052] Cooling water in the water supply pipe 11 enters the upper cone 31 below through the vertical pipe 30, and then flows into multiple guide grooves 32 evenly distributed along the axis inside the upper cone 31. Since the annular cavity 33 is annular, even if the inner ring 22 is rotating, the bottom of each guide groove 32 can always maintain stable communication with the annular cavity 33, and the cooling water can flow from the guide grooves 32 into the annular cavity 33. Therefore, in order to ensure that the cooling water can flow smoothly into the annular cavity 33 without flowing out from the gap between the upper cone 31 and the inner ring 22 when they are rotating relative to each other, the implementers can open a sealing groove with an annular cross section at the top of the inner ring 22, and the bottom of the upper cone 32 can be fitted with a sealing groove. A sealing ring is installed that extends into and is rotatably connected to the sealing groove. The contact area between the upper cone 31 and the inner ring 22 is increased through the cooperation between the sealing ring and the sealing groove, thereby realizing the smooth transmission of cooling water. The cooling water in the annular cavity 33 flows into the internal cavity of the inner blade 24 through the water inlet groove 34 in the rotating shaft 23, and then into the internal cavity of the outer blade 27 through the water inlet groove 34 in the linkage shaft 25, continuously cooling the blades and keeping them at a reasonable temperature to prevent the blades from being heated by high-temperature steam. When the inner blade 24 and outer blade 27, which are kept at a low temperature, come into contact with the rising steam, they can also play an auxiliary pre-cooling role for the steam, laying the foundation for subsequent spray condensation.

[0053] The inner blade 24 and the outer blade 27 are also provided with drainage grooves 35, which are respectively connected to the internal cavity and the outer wall at both ends. The drainage grooves 35 are located on the outer side of the lower end of the inner blade 24 and the outer blade 27. The cooling water in the cavity of the inner blade 24 and the outer blade 27 can be discharged to the outside through the corresponding drainage grooves 35. Since the diameter of the drainage groove 35 is smaller than the diameter of the water inlet groove 34, the drainage speed of the drainage groove 35 is less than the speed at which water enters the outer blade 27 from the inner blade 24, ensuring that the cooling water can fully fill the cavity of the inner blade 24 and the outer blade 27, so as to achieve sufficient cooling of the blades. The small amount of cooling water discharged drips downwards and disperses under the action of the rotating inner blade 24 and outer blade 27, making initial contact with the steam rising from the bottom of the main cylinder 1. Because the amount of water is small, it only has a slight pre-cooling effect on the steam and will not cause the steam to condense. In this way, a complete processing flow is formed, that is, the water discharged from the drain trough 35 first performs a small amount of pre-cooling on the steam, then the inner blade 24 and outer blade 27 stir and exchange heat, and finally the main spray cooling is achieved by the nozzle of the branch pipe 12, which greatly reduces the processing load of the water separator 13 in the subsequent auxiliary cylinder 10, and realizes the reduction of the load on the water separator 13.

[0054] In actual operation, the slag flushing position is located at the lower end of the main cylinder 1. The high-temperature steam generated by slag flushing can enter the interior of the main cylinder 1 along the axial direction of the main cylinder 1. The cooling water discharged from the drainage groove 35 at the lower end of the inner blade 24 and the outer blade 27, which still retains a low temperature after completing the blade cooling and heat exchange, drips vertically downward from the bottom of the blades and finally falls to the slag flushing position below. It can directly spray and cool the slag and flush it, assisting in the completion of the slag flushing operation, realizing the cascade utilization of cooling water and improving the water resource utilization rate.

[0055] The cooling water discharged from the aforementioned drainage trough 35 will not be thrown onto the inner wall of the main cylinder 1. The core principle is as follows: the blades can throw water onto the inner wall of the main cylinder 1 because the condensate water falling from the spray falls on the upper surface of the inner blade 24 and the outer blade 27, contacts the rotating inner blade 24 and the outer blade 27, and is driven to make synchronous circular motion. When the centrifugal force generated by the circular motion is greater than the adhesion force between the water and the surface of the inner blade 24 and the outer blade 27, the water is thrown radially toward the inner wall of the main cylinder 1. The drainage trough 35 is opened at the lower end of the inner blade 24 and the outer blade 27, and the outlet is a vertically downward slit-type flow guide structure. Under high water pressure, the water flow is forced to be directed vertically downward. The kinetic energy of the vertically downward fluid is much greater than the tangential kinetic energy, and it does not contact the upper rotating working surface of the inner blade 24 and the outer blade 27, so it cannot obtain sufficient centrifugal force. Therefore, it will not be thrown onto the inner wall of the main cylinder 1, but will fall toward the slag flushing position below.

[0056] Reference Figure 5As shown, the inner walls of the main cylinder 1 and the auxiliary cylinder 10 are equipped with receiving components 4 for receiving water on their inner walls; specifically, the receiving component 4 includes an arc-shaped plate 40 and a drain pipe 41. The two arc-shaped plates 40 are respectively installed on the inner side walls of the main cylinder 1 and the auxiliary cylinder 10, and the area between the arc-shaped plate 40 and the corresponding main cylinder 1 and auxiliary cylinder 10 forms a receiving area. The outer sides of the main cylinder 1 and the auxiliary cylinder 10 are both connected to the drain pipe 41 that extends into the corresponding receiving area.

[0057] Both arc-shaped plates 40 adopt an arc-shaped structure that is wider at the top and narrower at the bottom. The narrow opening at the bottom of the arc-shaped plate 40 inside the main cylinder 1 corresponds to the outer edge of the bottom of the vortex unit 2, and the narrow opening at the bottom of the arc-shaped plate 40 inside the auxiliary cylinder 10 corresponds to the bottom of the water ejector 13. This allows the upper edge of the arc-shaped plate 40 to completely conform to the water flow path of the cylinder wall, ensuring that all the condensate and residual droplets flowing down the cylinder wall fall into the receiving area. At the same time, it prevents the bottom airflow from entering the receiving area and avoids the water accumulation being carried away by the airflow, causing secondary water carryover in the steam.

[0058] During equipment operation, the condensate water that is thrown onto the inner wall of the main cylinder 1 by the cyclone unit 2 and the residual droplets that are thrown onto the inner wall of the auxiliary cylinder 10 by the water flinger 13 both flow downward along the corresponding cylinder wall and eventually fall into the receiving area enclosed by the corresponding arc plate 40 below, where they are stably supported. The water collected in the receiving area can be discharged in time through the corresponding drain pipe 41 to ensure the stability of gas-liquid separation and condensation dehydration effect.

[0059] Meanwhile, since the cooling water discharged from the drainage trough 35 drips vertically downwards, it will not fall into the receiving area of ​​the arc plate 40. The condensate mixed with dust collected by the arc plate 40 will be directly discharged and recycled through the corresponding drainage pipe 41, and will not fall downwards into the slag flushing position at the lower end of the main cylinder 1. The two water flows are completely separated to achieve diversion, which can ensure that the clean cooling water discharged from the drainage trough 35 can fall stably to the slag flushing position, avoid the condensate containing impurities from contaminating the slag flushing water, and ensure the stability and smoothness of the slag flushing operation.

[0060] Example 2: Reference Figure 3 , Figure 4 and Figure 9 As shown, based on Embodiment 1, an elastic absorbent cloth 28 is installed between two adjacent inner leaves 24, and the two ends of the elastic absorbent cloth 28 are connected to the upper half of one inner leaf 24 and the lower half of the other inner leaf 24, respectively. The height of the outer ring 26 is lower than the height of the inner ring 22, and both the inner leaf 24 and the outer leaf 27 are inclined downward toward the outer ring 26. Several structural grooves 29 corresponding to the elastic absorbent cloth 28 are opened at the upper end of the inner ring 22.

[0061] The elastic absorbent fabric 28 is made of hydrophilic polyurethane elastic nonwoven fabric, which has excellent reversible elastic deformation ability, high hydrophilic water retention performance and long-term temperature resistance and corrosion resistance above 160 degrees Celsius. It can maintain structural and performance stability during repeated stretching and compression cycles.

[0062] During actual operation, when the high-temperature steam rising from the bottom of the main cylinder 1 flows upward through the inner blade 24 area, it needs to pass through the elastic absorbent cloth 28 staggered between adjacent inner blades 24. Because the two ends of the elastic absorbent cloth 28 are connected to the upper and lower staggered ends of the adjacent inner blades 24 respectively, the elastic absorbent cloth 28 is in an obliquely extended state, forming a stable contact angle with the rising steam flow direction, which can greatly increase the contact area with the steam. During the process of the steam passing through the elastic absorbent cloth 28, the dust and other solid impurities it carries are actively intercepted by the elastic absorbent cloth 28, and the fine free condensate droplets carried in the steam are simultaneously adsorbed and retained by the elastic absorbent cloth 28. The elastic absorbent cloth 28 with water adsorbed is in a wet state, which can fully contact and exchange heat with the continuously rising high-temperature steam. Combined with the cooling water captured by the elastic absorbent cloth 28 and sprayed from the circular groove of the branch pipe 12 and the falling condensate formed by the steam condensation, the steam is further pre-cooled, and at the same time, the free droplets carried in the steam are intercepted a second time, which enhances the gas-liquid separation effect and reduces the burden on subsequent spray condensation.

[0063] When the elastic absorbent cloth 28 reaches saturation in terms of water absorption and accumulates a certain amount of impurities, the drive shaft 23 can be used to drive all the inner leaves 24 to swing towards the same side at an angle, achieving self-cleaning and drainage of the elastic absorbent cloth 28. Since the two ends of the elastic absorbent cloth 28 are connected to the upper half of one inner leaf 24 and the lower half of the adjacent inner leaf 24 respectively, when all the inner leaves 24 swing towards the same side, the gap between adjacent inner leaves 24 shrinks synchronously, and the upper half of one inner leaf 24 approaches the lower half of the adjacent inner leaf 24, thus improving the self-cleaning and drainage of the elastic absorbent cloth 28. 8. A composite compression is formed, and the internal pores of the elastic absorbent cloth 28 are forcibly closed, so that the dust-containing condensate retained by the adsorption is completely squeezed out. When all the inner blades 24 swing back to their original positions, the gap between two adjacent inner blades 24 increases synchronously, and the upper half of one inner blade 24 moves away from the lower half of the adjacent inner blade 24. The elastic absorbent cloth 28 is stretched and enlarged synchronously and uniformly, and the internal pores are fully opened, which greatly reduces the steam flow resistance and ensures that the steam passes through quickly. At the same time, it relies on its own elasticity to fully reset and restore its adsorption and retention capacity, avoiding the increase of flow resistance caused by impurities clogging the channel.

[0064] In this embodiment, the construction groove 29 can prevent the inner wall of the outer ring 26 from obstructing the extruded water flow, ensuring that the water flow is smoothly transported to the outer ring 26.

[0065] In this embodiment, the elastic absorbent cloth 28 is only arranged between adjacent inner blades 24 and not in the outer blade 27 area. The core reason is that the top opening of the arc plate 40 inside the main cylinder 1 corresponds to the inner blade 24, and the rising steam is gathered towards the inner blade 24. The inner blade 24 area is the core flow channel for rising steam and the core station for impurity interception and pre-condensation heat exchange. The staggered arrangement of the elastic absorbent cloth 28 can maximize its functions of filtration, heat exchange and gas-liquid separation. On the other hand, the outer blade 27 area is the core station for centrifugal water removal. Its core function is to use the centrifugal force generated by high-speed rotation to throw the condensate radially towards the inner wall of the main cylinder 1. If the elastic absorbent cloth 28 is arranged in the outer blade 27, it will hinder the radial throwing of condensate and increase the rotational load, thus weakening the centrifugal water removal efficiency. Therefore, the elastic absorbent cloth 28 is only arranged in the inner blade 24 to take into account both the pre-cooling filtration effect and the centrifugal water removal efficiency, achieving the optimal performance configuration.

[0066] Meanwhile, since the height of the outer ring 26 is lower than that of the inner ring 22, both the inner blade 24 and the outer blade 27 are inclined downward toward the outer ring 26. The condensate forced out from the elastic absorbent cloth 28 flows smoothly outward along the inclined upper surface of the inner blade 24 through the smooth guide surface of the structural groove 29. There are no steps or obstructions along the way, and it can smoothly cross the height difference between the inner ring 22 and the outer ring 26 and directly enter the upper rotating working surface of the outer blade 27. It will not be blocked by the inner wall of the outer ring 26, which would cause the water flow to fall back or the steam to carry water again. Finally, the water flow is driven by the synchronously rotating outer blade 27 to make a circular motion. When the centrifugal force generated by the circular motion is greater than the adhesion force between the water and the blade surface, the water flow is stably thrown radially toward the inner wall of the main cylinder 1. Even if a small part of the water flow splashes on the inner wall of the main cylinder 1, it can be caught by the corresponding arc plate 40 at the bottom.

[0067] Example 3: Reference Figure 6 and Figure 7 As shown, based on Embodiments 1 and 2, in order to drive the inner ring 22 and the rotating shaft 23 to rotate, a drive assembly 5 is installed between the upper top cone 31 and the inner ring 22. The drive assembly 5 includes a drive motor 50, which is mounted on the lower end of the upper top cone 31 through a motor mount. A rotating disk 51 is fixedly sleeved on the outer side of the main shaft of the drive motor 50, and the outer side of the rotating disk 51 is connected to the inner wall of the inner ring 22.

[0068] That is, the drive motor 50 can drive the inner ring 22 to rotate through the rotating disk 51.

[0069] The inner ring 22 has an L-shaped cross-section annular groove inside. One end of the annular groove extends to the outer side of several rotating shafts 23, and the other end extends to the inner wall of the inner ring 22. A drive disk 52 is rotatably installed inside the annular groove. An external gear ring 53 is installed on the top of the drive disk 52. A drive gear 54 that meshes with the external gear ring 53 is fixedly sleeved on the outer side of the rotating shaft 23. An electric push rod 55 is also installed at the lower end of the upper top cone 31 through a cylinder seat. An arc-shaped rack 56 is installed at the telescopic end of the electric push rod 55. An internal gear ring 57 corresponding to the arc-shaped rack 56 is installed on the inner diameter of the drive disk 52.

[0070] Since the inner ring 22 is rotating, and the drive disc 52 is rotatably connected to the inner ring 22 through the annular groove, the drive disc 52 will rotate synchronously with the inner ring 22, achieving synchronous rotation with the inner ring 22 and the rotating shaft 23, ensuring the stable execution of steam agitation and centrifugal water throwing actions; when it is necessary to drive the inner blade 24 and the outer blade 27 to swing at an angle to achieve the squeezing and drainage, reset and blade angle adjustment of the elastic absorbent cloth 28, the electric push rod 55 is started and drives the arc-shaped rack 56 to extend, so that the arc-shaped rack 56 meshes with the inner gear ring 57 on the inner diameter of the drive disc 52. At this time, the rotation of the drive disc 52 can be paused by the meshing limit of the arc-shaped rack 56 and the inner gear ring 57, while the inner ring 22 continues to rotate under the drive of the drive motor 50, thereby causing relative rotation between the drive disc 52 and the inner ring 22.

[0071] Furthermore, since the force of the rotating drive disc 52 stopping instantaneously after the arc-shaped rack 56 stops the rotation of the drive disc 52 by passing through the internal gear ring 57 will be transmitted to the telescopic end of the electric push rod 55, causing it to be damaged, a guide plate can be installed at the lower end of the upper cone 31. The guide plate is slidably connected to the telescopic end of the electric push rod 55, which plays a role in limiting and guiding the telescopic end of the electric push rod 55. The guide plate bears the stopping force on the telescopic end of the electric push rod 52, so as to prevent the electric push rod 55 from being damaged.

[0072] When the drive disc 52 and the inner ring 22 rotate relative to each other, the outer gear ring 53 at the top of the drive disc 52 rotates synchronously. Since the outer gear ring 53 meshes with the drive gear 54 on the outside of the rotating shaft 23, the rotation of the outer gear ring 53 will drive the drive gear 54 to rotate synchronously, thereby driving the rotating shaft 23 to rotate around its own axis. When the rotating shaft 23 rotates, it synchronously drives the inner leaf 24 connected to it to swing at an angle. The inner leaf 24 then drives the outer leaf 27 to swing at an angle synchronously through the linkage shaft 25, realizing the coordinated adjustment of the swing angle of the inner leaf 24 and the outer leaf 27 to adapt to different steam flow conditions. At the same time, it completes the squeezing-stretching action of the elastic absorbent cloth 28, realizing the self-cleaning and drainage of the elastic absorbent cloth 28.

[0073] Once the blade angle adjustment is complete and the elastic absorbent cloth 28 has finished draining, the electric push rod 55 drives the arc-shaped rack 56 to retract, causing the arc-shaped rack 56 to disengage from the inner gear ring 57, releasing the rotation limit on the drive disc 52. Under the action of inertia and the friction of the inner ring 22, the drive disc 52 quickly returns to the state of synchronous rotation with the inner ring 22, ensuring that the equipment resumes normal steam agitation, centrifugal water throwing and adsorption interception. The entire drive process is smooth and continuous, and the blade angle adjustment can be completed without stopping the machine, without affecting the overall operating efficiency of the equipment.

[0074] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive.

[0075] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A variable-diameter chimney for blast furnace slag flushing steam recovery with a spray-assisted swirl plate, comprising a main cylinder (1), wherein a secondary cylinder (10) is installed through the top of the main cylinder (1), the inner diameter of the secondary cylinder (10) being smaller than that of the main cylinder (1), a water supply pipe (11) is provided through the middle of the main cylinder (1), and several branch pipes (12) are installed through the outer side of the water supply pipe (11), wherein the bottom of the branch pipes (12) is provided with a circular groove for installing nozzles, characterized in that, Also includes: A water-spinning device (13) is installed in the middle of the auxiliary cylinder (10) to throw the residual moisture in the steam onto its inner wall. The swirl unit (2) includes an inner ring (22) and an outer ring (26) rotatably mounted in the main cylinder (1), a plurality of inner blades (24) mounted on the inner ring (22) via a rotating shaft (23), a plurality of outer blades (27) connected to the inner blades (24) via a linkage shaft (25) and mounted on the outer ring (26), and an elastic absorbent cloth (28) connected between two adjacent inner blades (24). The two ends of the elastic absorbent cloth (28) are respectively connected to the upper half of one inner leaf (24) and the lower half of the other inner leaf (24) so ​​as to change the pore state of the elastic absorbent cloth (28) when the inner leaf (24) swings.

2. The blast furnace slag flushing steam recovery variable diameter chimney with sprayed post-swirling plates according to claim 1, characterized in that, In two adjacent inner leaves (24), the upper half of one inner leaf (24) and the lower half of the other inner leaf (24) are staggered and opposite to each other, so that the elastic absorbent cloth (28) is in an obliquely extended state to intercept dust and droplets in the rising steam.

3. The blast furnace slag flushing steam recovery variable diameter chimney with sprayed post-swirling plates according to claim 1, characterized in that, Both the inner leaf (24) and the outer leaf (27) are inclined downward toward the outer ring (26), and the height of the outer ring (26) is lower than the height of the inner ring (22). The upper end of the inner ring (22) is provided with a structural groove (29) corresponding to the elastic absorbent cloth (28) to guide the water squeezed out from the elastic absorbent cloth (28) toward the outer ring (26).

4. A blast furnace slag flushing steam recovery variable diameter chimney with a sprayed post-swirling plate according to claim 1, characterized in that, The inner leaf (24) and the outer leaf (27) are both provided with cavities, and the rotating shaft (23) and the linkage shaft (25) are both provided with water inlet grooves (34). The main cylinder (1) is also equipped with a cooling component (3), which includes a vertical pipe (30) and an upper cone (31). The vertical pipe (30) is connected to the water supply pipe (11). The upper cone (31) has a guide groove (32) inside, and the bottom of the upper cone (31) is rotatably connected to the top of the inner ring (22). The top of the inner ring (22) is provided with an annular cavity (33). One end of the guide groove (32) is connected to the annular cavity (33). The annular cavity (33) is connected to the internal cavity of the inner blade (24) through the water inlet groove (34) on the rotating shaft (23). The internal cavity of the inner blade (24) is connected to the internal cavity of the outer blade (27) through the water inlet groove (34) on the linkage shaft (25), which is used to cool the inner blade (24) and the outer blade (27).

5. A blast furnace slag flushing steam recovery variable diameter chimney with a sprayed post-swirling plate according to claim 4, characterized in that, The lower outer sides of the inner leaf (24) and the outer leaf (27) are provided with drainage grooves (35), and the two ends of the drainage grooves (35) are respectively connected to the internal cavity and the outside of the inner leaf (24) or the outer leaf (27); The diameter of the drainage trough (35) is smaller than that of the water inlet trough (34), and it is used to discharge the cooling water after heat exchange vertically downward to the slag flushing position at the bottom of the main cylinder (1).

6. A blast furnace slag flushing steam recovery variable diameter chimney with a sprayed post-swirling plate according to claim 5, characterized in that, The inner walls of the main cylinder (1) and the auxiliary cylinder (10) are each equipped with a receiving component (4), which includes an arc plate (40) and a drain pipe (41). The arc plate (40) is an arc-shaped structure that is narrow at the bottom and wide at the top. It forms a receiving area with the inner wall of the corresponding main cylinder (1) or auxiliary cylinder (10). The drain pipe (41) is installed through the receiving area to collect and discharge the dust-containing condensate that is thrown to the cylinder wall by the vortex unit (2) or the water thrower (13).

7. A blast furnace slag flushing steam recovery variable diameter chimney with a sprayed post-swirling plate according to claim 6, characterized in that, The narrow opening at the lower end of the arc plate (40) inside the main cylinder (1) corresponds to the bottom outer edge of the vortex unit (2), so that all the dust-laden condensate flowing down the inner wall of the main cylinder (1) falls into the receiving area, while isolating the clean cooling water discharged from the drain trough (35).

8. A blast furnace slag flushing steam recovery variable diameter chimney with a sprayed post-swirling plate according to claim 1, characterized in that, It also includes a drive assembly (5) for driving the inner blade (24) and outer blade (27) to rotate and oscillate, the drive assembly (5) comprising: A drive motor (50) is installed at the bottom of the upper cone (31), and a rotating disk (51) connected to the inner wall of the inner ring (22) is provided on its main shaft to drive the inner ring (22) to rotate. The drive disc (52) is rotatably mounted in an annular groove inside the inner ring (22); An electric push rod (55) is installed at the bottom of the upper cone (31), and an arc-shaped rack (56) is installed at its telescopic end. An internal gear ring (57) corresponding to the arc-shaped rack (56) is installed on the inner diameter of the drive disc (52). An external gear ring (53) is mounted on top of the drive disc (52); The drive gear (54) is fixedly sleeved on the outside of the rotating shaft (23) and meshes with the external gear ring (53).

9. A blast furnace slag flushing steam recovery variable diameter chimney with a sprayed post-swirling plate according to claim 8, characterized in that, When the electric push rod (55) drives the arc-shaped rack (56) to extend and mesh with the inner gear ring (57), the drive disk (52) stops rotating, while the inner ring (22) continues to rotate under the drive of the drive motor (50), causing the drive disk (52) and the inner ring (22) to rotate relative to each other. Then, through the meshing of the outer gear ring (53) and the drive gear (54), the rotating shaft (23) is driven to rotate around its own axis, causing the inner leaf (24) and the outer leaf (27) to swing at an angle.

10. A blast furnace slag flushing steam recovery variable diameter chimney with a sprayed post-swirling plate according to claim 9, characterized in that, The angle swing of the inner leaf (24) and the outer leaf (27) is used to adjust the gap between adjacent inner leaves (24) to achieve composite squeezing drainage of the elastic absorbent cloth (28) or to increase its pores to restore its adsorption capacity.

Images