Energy-saving blast furnace blast dehumidification device

Abstract

The present application relates to blast furnace blast treatment equipment technical field, disclose a kind of energy-saving blast furnace blast dehumidification device, including dehumidification tower body, particle backfeed assembly, particle backflow valve assembly and renewable hygroscopic particle, center return cylinder and annular adsorption bed cavity are equipped in dehumidification tower body, spiral lifting part is lifted to upper portion, particle is returned annular adsorption bed cavity by guide valve cover, annular return valve mouth and centrifugal valve disc, and self-forming particle throttle body is formed on centrifugal valve disc, by adjusting centrifugal valve disc rotating speed, different dynamic balance distribution state is formed between upper temporary storage area and annular adsorption bed cavity, so as to change effective adsorption bed height;Lower rotating speed reduces blast resistance and prolongs particle regeneration residence time, higher rotating speed increases effective adsorption particle amount, improves dehumidification capacity, realizes the synergic regulation of dehumidification capacity, blast resistance and particle regeneration.

Description

Technical Field

[0001] This invention relates to the field of blast furnace blast treatment equipment, and more particularly to an energy-saving blast furnace blast dehumidification device. Background Technology

[0002] During the blast furnace smelting process, a certain flow of air needs to be continuously supplied into the blast furnace through the blast system to maintain the atmospheric conditions required for combustion and reduction reactions inside the furnace. Affected by seasonal, weather, and changes in ambient temperature and humidity, the moisture content of the air entering the blast system fluctuates greatly. The moisture in the air will participate in the furnace reaction after entering the blast furnace with the blast, and will affect the heat balance in the tuyeres area and the operating status of the blast furnace. Therefore, in order to reduce the interference of changes in external air humidity on the blast furnace smelting process, it is usually necessary to dehumidify the air during the blast supply process to reduce and stabilize the moisture content of the blast entering the blast furnace.

[0003] Existing blast furnace blast dehumidification methods mainly include cooling and condensation dehumidification and adsorption dehumidification. Cooling and condensation dehumidification usually requires cooling the blast to below the dew point to condense the water vapor, and then heating the air according to the subsequent blast process requirements. This method requires refrigeration, heat exchange, and condensate treatment equipment. When the air volume is large, the cooling and reheating process will generate a large energy consumption. Adsorption dehumidification can use hygroscopic materials such as silica gel, molecular sieves, and activated alumina to adsorb moisture in the air, and regenerate the hygroscopic materials by heating. Compared with deep cooling methods, it has the possibility of using low-grade heat sources for regeneration.

[0004] However, blast furnaces have a large air volume, and the humidity of the ambient air changes continuously with external operating conditions. In order to meet the dehumidification requirements under high humidity conditions, some dehumidification devices that use particulate adsorption materials usually need to be equipped with particulate adsorption beds with a certain thickness or a large filling volume. When the ambient humidity is low and the dehumidification load is small, if all the air is still forced to pass through a particulate adsorption bed of the same thickness, unnecessary flow resistance will be generated, increasing the energy consumption of the blast equipment. If the dehumidification capacity is adjusted by simply changing the air flow rate, bypass ratio, or particle circulation speed, it is difficult to simultaneously take into account the particle content in the adsorption bed, the blast resistance, and the particle regeneration status.

[0005] Furthermore, for dehumidification devices using circulating particulate adsorption materials, the absorbent particles need to circulate between the adsorption zone and the regeneration zone. Existing particle circulation and regeneration processes usually focus on particle conveying or the regeneration of the adsorption material itself. There is a lack of effective coordinated adjustment between the effective particle inventory in the adsorption zone and the particle residence in the regeneration zone. When the dehumidification load is reduced, if only the adsorption capacity is reduced without simultaneously adjusting the distribution relationship of adsorbent particles between the working zone and the regeneration zone, there may still be problems such as excessive adsorption bed resistance or insufficient particle regeneration time.

[0006] Therefore, how to adjust the effective amount of adsorbed particles participating in blast dehumidification according to the changes in blast furnace blast dehumidification load, and maintain a relatively stable balance in particle inventory under different operating conditions, while taking into account the resistance loss when the blast passes through the adsorption bed and the regeneration effect of the humidified particles, is a problem that needs to be solved in the process of further energy-saving optimization of blast furnace blast dehumidification device. Summary of the Invention

[0007] The purpose of this invention is to provide an energy-saving blast furnace blast dehumidification device to solve the problem that it is difficult to reasonably adjust the amount of moisture-absorbing particles participating in dehumidification according to the changes in dehumidification load during the existing blast furnace blast dehumidification process, thus making it difficult to balance dehumidification capacity, blast flow resistance and moisture-absorbing particle regeneration effect.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: an energy-saving blast furnace blast dehumidification device, comprising a dehumidification tower body, a particle return conveying assembly, a particle reflux valve assembly, and regenerable moisture-absorbing particles; The dehumidification tower is provided with a central return cylinder and an annular adsorption bed cavity surrounding the central return cylinder. The lower part of the central return cylinder is connected to the lower part of the annular adsorption bed cavity. The annular adsorption bed cavity is provided with an air inlet pipe and an air outlet pipe. The regenerable moisture-absorbing particles form a particle adsorption bed in the annular adsorption bed cavity. The particle return assembly includes a drive mechanism and a spiral lifting component rotatably disposed inside the central return cylinder, wherein the upper part of the central return cylinder is provided with a lifting outlet. The particle reflux valve assembly includes a guide valve cover and a centrifugal valve disc located below the guide valve cover. The centrifugal valve disc is drivenly connected to the spiral lifting component. The upper surface of the centrifugal valve disc is provided with a conical guide part and an annular valve edge part in a radial direction from the inside to the outside. The upper surface of the annular valve edge part forms an annular material receiving surface with a radial width. An annular return valve port is formed between the lower opening of the guide valve cover and the conical guide part. A first particle storage area is formed above the feed valve cover, and a second particle storage area is formed correspondingly on the annular feed surface. The regenerable hygroscopic particles discharged from the lifting outlet can enter the first particle storage area and enter the centrifugal valve disc through the annular return valve port. They move along the conical feed guide to the second particle storage area, and return to the annular adsorption bed cavity after passing the radial outer edge of the annular valve edge. The regenerable hygroscopic particles form a self-forming particle throttling fluid on the centrifugal valve disc as the centrifugal valve disc rotates. The self-forming particle throttling fluid is at least partially located in the particle passage area of ​​the annular return valve port, so as to restrict the passage of regenerable hygroscopic particles through the annular return valve port by its accumulation state. The driving mechanism can drive the spiral lifting component and the centrifugal valve disc to rotate at a first speed and a second speed greater than the first speed. The first speed and the second speed correspond to the first particle balance state and the second particle balance state, respectively. In the first particle balance state, the particle balance temporary storage amount in the first particle storage area and the second particle storage area is greater than the particle balance temporary storage amount in the second particle balance state. In the first particle balance state, the particle storage amount in the annular adsorption bed cavity is less than the particle storage amount in the second particle balance state, so that the effective adsorption bed height in the first particle balance state is less than the effective adsorption bed height in the second particle balance state.

[0009] Preferably, the centrifugal valve disc is connected to the spiral lifting member via at least one transmission rod, the transmission rod passing through the area where the annular return valve is located, so that the centrifugal valve disc and the spiral lifting member rotate synchronously.

[0010] Preferably, a plurality of raised ribs are fixedly provided on the annular material-bearing surface of the annular valve edge, and the plurality of raised ribs are distributed at intervals around the rotation axis of the centrifugal valve disc, so as to drive the regenerable moisture-absorbing particles located on the annular material-bearing surface to rotate with the centrifugal valve disc during the rotation of the centrifugal valve disc; In the first particle equilibrium state, the radial expansion of the self-forming particle throttling fluid is less than that in the second particle equilibrium state.

[0011] Preferably, the driving mechanism is an adjustable speed driving mechanism, and the working speed of the centrifugal valve disc is divided into a low-speed working area and a high-speed working area based on the critical speed ωx. The low-speed working area corresponds to a working speed that is greater than zero and not greater than the critical speed ωx, and the high-speed working area corresponds to a working speed that is greater than the critical speed ωx. The first rotational speed is located in the low-speed operating range, and the second rotational speed is located in the high-speed operating range.

[0012] Preferably, after switching from the second speed to the first speed, during the process of establishing the first particle balance state, the amount of regenerable moisture-absorbing particles discharged through the lifting outlet per unit time is greater than the amount of regenerable moisture-absorbing particles returned to the annular adsorption bed cavity per unit time, so that the regenerable moisture-absorbing particles are transferred from the annular adsorption bed cavity to the first particle temporary storage area and the second particle temporary storage area until the particle lifting amount and the particle return amount are basically equal. After switching from the first speed to the second speed, during the process of establishing the second particle equilibrium state, the amount of regenerable hygroscopic particles returning to the annular adsorption bed cavity per unit time is greater than the amount of regenerable hygroscopic particles discharged through the lifting outlet per unit time, so that the regenerable hygroscopic particles in the first particle storage area and the second particle storage area are transferred to the annular adsorption bed cavity until the particle return amount is basically equal to the particle lifting amount.

[0013] Preferably, the annular valve edge extends along the radial space between the central return cylinder and the annular adsorption bed cavity to form the annular material receiving surface on the radially outer side of the conical guide section; The effective cross-sectional area of ​​the annular adsorption bed chamber is greater than the effective cross-sectional area of ​​the central return cylinder.

[0014] Preferably, the upper part of the dehumidification tower is provided with a regeneration heat exchange structure, which includes a regeneration heat exchange tube that at least partially forms a heat exchange relationship with the first particle storage area. The regeneration heat exchange tube is used to indirectly heat the regenerable moisture-absorbing particles temporarily stored in the first particle storage area through the heat exchange medium flowing inside it.

[0015] Preferably, in the first particle equilibrium state, the particle equilibrium temporary storage amount in the first particle temporary storage area is greater than the particle equilibrium temporary storage amount in the first particle temporary storage area in the second particle equilibrium state, and the average residence time of the regenerable moisture-absorbing particles in the thermal action area of ​​the regenerable heat exchange structure in the first particle equilibrium state is greater than the average residence time in the second particle equilibrium state.

[0016] Preferably, the top of the dehumidification tower is provided with a dehumidification pipe, the dehumidification pipe is provided with a control valve, and the dehumidification pipe is connected to an external dehumidification suction assembly. The inlet of the dehumidification pipe is connected to the internal space of the tower above the first particle storage area. The upper part of the annular adsorption bed chamber is in gas communication with the internal space of the tower above the first particle storage area; under normal blower dehumidification state, the control valve is closed so that the gas entering the dehumidification tower is discharged through the outlet pipe; under particle regeneration dehumidification state, the control valve is opened and the dehumidification suction assembly is operated so that some of the gas in the dehumidification tower flows upward to the first particle storage area and carries the water vapor generated by the thermal desorption of the regenerable moisture-absorbing particles and is discharged through the dehumidification pipe.

[0017] Preferably, a breathable material barrier is fixedly installed inside the dehumidification tower body, and an annular air duct is formed between the breathable material barrier and the inner wall of the dehumidification tower body. The air inlet pipe is connected to the annular air duct, and the annular air duct is connected to the annular adsorption bed cavity through the breathable material barrier. The air outlet pipe is connected to the upper part of the annular adsorption bed cavity so that the blast furnace air to be dehumidified passes through the particle adsorption bed from bottom to top, and the regenerable moisture-absorbing particles move from top to bottom in the annular adsorption bed cavity.

[0018] The present invention has the following beneficial effects: 1. Enables on-demand adjustment of effective adsorption bed height and blower resistance.

[0019] This invention constructs a circulation path for regenerable hygroscopic particles through a central return cylinder, a spiral lifting component, and a particle return valve assembly. The regenerable hygroscopic particles form a self-forming particle throttling fluid on a centrifugal valve disc. Changing the rotational speed of the centrifugal valve disc alters the balanced distribution of particles between the first particle storage area, the second particle storage area, and the annular adsorption bed chamber, allowing different operating speeds to correspond to different effective adsorption bed heights. Therefore, when the dehumidification load is low, the effective adsorption bed height can be reduced, decreasing the flow resistance generated by the blast air passing through the particle adsorption bed. When the dehumidification load increases, the amount of working particles in the annular adsorption bed chamber can be increased, improving the effective adsorption bed height and dehumidification capacity, thus balancing the blast furnace blast dehumidification effect with conveying energy consumption.

[0020] 2. It can form a stable particle spatial distribution state corresponding to the working speed.

[0021] This invention does not adjust the adsorption bed height by adding or removing moisture-absorbing particles into the device. Instead, it redistributes the particles between the annular adsorption bed chamber and the upper particle storage area by changing the relative relationship between particle lifting and particle return, while keeping the total amount of moisture-absorbing particles essentially constant. After the particles are redistributed, the particle lifting amount and particle return amount reach a dynamic balance again, thereby forming a stable particle storage amount and a stable effective adsorption bed height corresponding to the current operating speed. This avoids the adsorption bed height from continuously rising or falling with particle circulation, thus improving the stability of the device's operating status.

[0022] 3. By utilizing the dynamic throttling structure formed by the circulating moisture-absorbing particles themselves, the coordinated regulation of particle feeding and particle temporary storage can be achieved.

[0023] This invention utilizes the self-forming particle throttling fluid formed by the self-accumulation of regenerable hygroscopic particles on a centrifugal valve disc. This self-forming particle throttling fluid at least partially acts on the particle passage area of ​​the annular return valve port, allowing the regenerable hygroscopic particles participating in adsorption and circulation to simultaneously serve as a functional throttling component of the particle return valve assembly, without relying solely on movable mechanical valves to change the particle passage state. Simultaneously, the particles contained within the self-forming particle throttling fluid itself constitute a portion of the upper particle temporary storage capacity. Changes in its accumulation state can synchronously alter the particle passage capacity and the upper particle temporary storage capacity, further causing changes in the working particle storage capacity within the annular adsorption bed chamber, thereby achieving linkage between particle return adjustment and effective adsorption bed height adjustment.

[0024] 4. Achieve synergistic effects of particle inventory regulation, heating regeneration, and desorption / moisture removal.

[0025] This invention sets up a regeneration heat exchange structure corresponding to the first particle storage area. Under the particle equilibrium state corresponding to a lower rotation speed, the particle equilibrium storage amount in the first particle storage area increases, and the average residence time of regenerable hygroscopic particles in the thermal effect area of ​​the regeneration heat exchange structure is prolonged. This reduces the effective bed height of the annular adsorption bed and the blowing resistance while improving the degree of particle heating and desorption. During normal blowing dehumidification, the control valve on the exhaust pipe is closed, so that the blowing air is mainly discharged through the outlet pipe. When it is necessary to discharge the water vapor generated by particle regeneration, the control valve is opened and the dehumidification suction component is activated to extract the humid gas through the exhaust pipe. This allows the particle regeneration process to cooperate with the normal blowing dehumidification process, reducing the impact of desorbed water vapor on the normal dehumidification airflow. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the energy-saving blast furnace blast dehumidification device of the present invention; Figure 2 This is a perspective structural diagram of the dehumidification tower body of the present invention; Figure 3 This is a partial exploded structural diagram of the dehumidification tower body of the present invention; Figure 4 This is a longitudinal cross-sectional view of the dehumidification tower body of the present invention under the first particle equilibrium state, showing the effective adsorption bed height H1 when the centrifugal valve disc is at the first rotational speed ω1; Figure 5 This is a partial longitudinal cross-sectional view of the upper part of the dehumidification tower body of the present invention under the first particle equilibrium state, showing the distribution of the first particle temporary storage area S1, the second particle temporary storage area S2 and the self-forming particle throttling fluid A under the first rotational speed ω1. Figure 6 This is a longitudinal cross-sectional view of the dehumidification tower body of the present invention under the second particle equilibrium state, showing the effective adsorption bed height H2 when the centrifugal valve disc is at the second rotational speed ω2; Figure 7 This is a partial longitudinal cross-sectional view of the upper part of the dehumidification tower body of the present invention under the second particle equilibrium state, showing the distribution of the first particle temporary storage area S1, the second particle temporary storage area S2 and the self-forming particle throttling fluid A at the second rotational speed ω2. Figure 8 This is a schematic cross-sectional view of the dehumidification tower body of the present invention, showing the radial arrangement of the central return cylinder, the annular adsorption bed chamber, and the annular valve edge.

[0027] In the diagram: 100, Dehumidification tower body; 101, Central return cylinder; 102, Annular adsorption bed chamber; 103, Air inlet pipe; 104, Air outlet pipe; 105, Regeneration heat exchange structure; 106, Dehumidification pipe; 107, Dehumidification suction assembly; 108, Breathable material barrier; 200, Particle return conveying assembly; 201, Drive mechanism; 202, Spiral lifting component; 203, Lifting outlet; 300, Particle reflux valve assembly; 301, Guide valve cover; 302, Centrifugal valve disc; 303, Annular return valve port; 304, Conical guide section; 305, Annular valve edge; 306, Transmission rod; 307, Raised rib. A. Self-forming particle throttling fluid; H1. Effective adsorption bed height under the first particle equilibrium state; H2. Effective adsorption bed height under the second particle equilibrium state; S1. First particle temporary storage area; S2. Second particle temporary storage area; ω1. First rotational speed; ω2. Second rotational speed. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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 limitations on this invention.

[0030] Example 1 Reference Figures 1 to 8 This embodiment describes the overall structure of the energy-saving blast furnace blast dehumidification device, the circulation path of the regenerable moisture-absorbing particles, and the main flow path of the blast furnace blast to be dehumidified.

[0031] The energy-saving blast furnace blast dehumidification device of this embodiment includes a dehumidification tower body 100, a particle return conveying assembly 200, a particle return valve assembly 300, and regenerable moisture-absorbing particles disposed in the dehumidification tower body 100.

[0032] The dehumidification tower body 100 is vertically oriented. A central return cylinder 101 extending along its axial direction is provided inside the dehumidification tower body 100. An annular adsorption bed cavity 102 is formed around the central return cylinder 101. Regenerable moisture-absorbing particles are contained in the annular adsorption bed cavity 102 and form a particle adsorption bed. The lower part of the central return cylinder 101 is connected to the lower part of the annular adsorption bed cavity 102, so that the regenerable moisture-absorbing particles that gradually move downward in the annular adsorption bed cavity 102 can enter the central return cylinder 101.

[0033] refer to Figure 8 The effective cross-sectional area of ​​the annular adsorption bed chamber 102 is larger than the effective cross-sectional area of ​​the central return cylinder 101, so that the annular adsorption bed chamber 102 can accommodate more regenerable moisture-absorbing particles for dehumidification by air blowing. At the same time, a radial space is formed between the central return cylinder 101 and the annular adsorption bed chamber 102 for the particle return valve assembly 300 to be arranged.

[0034] The particle return assembly 200 includes a drive mechanism 201 fixed on the dehumidification tower body 100 and a spiral lifting component 202 rotatably disposed in the central return cylinder 101. The upper part of the central return cylinder 101 is provided with a lifting outlet 203. In this embodiment, the drive mechanism 201 adopts a speed-adjustable reduction drive mechanism, such as a variable frequency reduction motor. The drive mechanism 201 drives the spiral lifting component 202 to rotate. The regenerable moisture-absorbing particles entering the lower part of the central return cylinder 101 are conveyed upward with the spiral lifting component 202 and discharged to the upper part of the dehumidification tower body 100 through the lifting outlet 203.

[0035] The particle return valve assembly 300 is disposed above the annular adsorption bed chamber 102, including a feed valve cover 301 and a centrifugal valve disc 302 located below the feed valve cover 301. The feed valve cover 301 is funnel-shaped in general, and its lower opening forms an annular return valve port 303 for regenerable hygroscopic particles to pass through between it and the centrifugal valve disc 302.

[0036] The centrifugal valve disc 302 is annular and surrounds the central return cylinder 101. The upper surface of the centrifugal valve disc 302 forms a conical guide part 304 and an annular valve edge part 305 in a radial direction from the inside to the outside. The conical guide part 304 gradually decreases from the radial inner side to the radial outer side. The annular valve edge part 305 is located on the radial outer side of the conical guide part 304, and its upper surface forms an annular material receiving surface with a certain radial width.

[0037] The regenerable moisture-absorbing particles discharged from the lifting outlet 203 first enter the upper part of the guide valve cover 301 and form a first particle storage area S1 in this area. The particles in the first particle storage area S1 are gathered along the guide valve cover 301 to its lower opening under the action of gravity, and enter the centrifugal valve disc 302 through the annular return valve 303.

[0038] The particles entering the centrifugal valve disc 302 move radially outward along the conical guide section 304 and enter the annular support surface of the annular valve edge section 305. The annular support surface can temporarily support some of the regenerable hygroscopic particles, thereby forming a second particle storage area S2. Particles that continue to move radially outward and cross the radial outer edge of the annular valve edge section 305 re-enter the annular adsorption bed chamber 102.

[0039] Thus, the regenerable moisture-absorbing particles are formed as follows: the annular adsorption bed chamber 102 moves down → the central return cylinder 101 → the spiral lifting component 202 lifts → the lifting outlet 203 → the first particle storage area S1 → the annular return valve 303 → the conical guide section 304 → the second particle storage area S2 → the circulation path of the annular adsorption bed chamber 102.

[0040] Furthermore, the centrifugal valve disc 302 is connected to the spiral lifting member 202 via at least one transmission rod 306, enabling the centrifugal valve disc 302 to rotate synchronously with the spiral lifting member 202. In this embodiment, multiple transmission rods 306 can be arranged along the circumference of the centrifugal valve disc 302 to improve the support and transmission stability of the centrifugal valve disc 302 during rotation.

[0041] Multiple raised ribs 307 are fixedly provided on the annular material-bearing surface of the annular valve flange 305. The multiple raised ribs 307 are arranged at intervals around the rotation axis of the centrifugal valve disc 302. When the centrifugal valve disc 302 rotates, the raised ribs 307 can enhance the circumferential driving effect of the annular material-bearing surface on the particles, reduce the circumferential slippage of the particles relative to the annular material-bearing surface, and enable the particles to rotate more fully with the centrifugal valve disc 302, which is conducive to the radial migration of the particles on the annular material-bearing surface.

[0042] It should be noted that the main function of the raised ribs 307 is to improve the circumferential motion coupling between the centrifugal valve disc 302 and the particles, rather than to change the properties of the particles themselves.

[0043] After the particles enter the centrifugal valve disc 302 through the annular return valve port 303, some particles accumulate near the annular return valve port 303 and on the annular material receiving surface, forming a self-forming particle throttling fluid A that rotates with the centrifugal valve disc 302. In this embodiment, the "self-forming particle throttling fluid A" refers to a particle accumulation formed by the regenerable hygroscopic particles themselves accumulating on the centrifugal valve disc 302, which can rotate with the centrifugal valve disc 302 and at least partially act on the particle passing area of ​​the annular return valve port 303. It is not an additional independent mechanical valve. The accumulation state of the self-forming particle throttling fluid A can affect the ability of particles in the first particle storage area S1 to continue to enter the second particle storage area S2.

[0044] It is worth noting that the self-forming particle throttling fluid A does not merely exist as the conveyed material controlled by the particle return valve assembly 300. Instead, it is formed by the regenerable hygroscopic particles participating in the circulation on the centrifugal valve disc 302, and participates in the throttling function of the particle return valve assembly 300 during device operation. Its accumulation state can limit the particle passage through the annular return valve port 303 on the one hand, and the regenerable hygroscopic particles it contains also constitute part of the upper particle temporary storage volume on the other hand. Therefore, the state change of the self-forming particle throttling fluid A can simultaneously affect the particle return capacity and the spatial distribution of particles in different areas.

[0045] In this embodiment, the regenerable moisture-absorbing particles can be solid moisture-absorbing materials that can be reused after being heated and desorbed, such as silica gel particles, molecular sieve particles, activated alumina particles, or other granular materials with moisture absorption and regeneration properties.

[0046] like Figure 3 As shown, regarding the flow path of the blast furnace blast air to be dehumidified, a permeable material barrier net 108 is provided inside the dehumidification tower body 100. An annular air duct is formed between the permeable material barrier net 108 and the inner wall of the dehumidification tower body 100. The air inlet pipe 103 is connected to the annular air duct. The annular air duct is connected to the annular adsorption bed chamber 102 through the permeable material barrier net 108. After the blast furnace blast air to be dehumidified enters the annular air duct through the air inlet pipe 103, it is distributed along the circumference of the dehumidification tower body 100 and then passes through the permeable material barrier net 108 to enter the annular adsorption bed chamber 102. The permeable material barrier net 108 allows gas to pass through while restricting the regenerable moisture-absorbing particles from entering the annular air duct.

[0047] The exhaust pipe 104 is connected to the upper part of the annular adsorption bed chamber 102. The blast furnace blast air to be dehumidified entering the annular adsorption bed chamber 102 mainly passes through the particle adsorption bed from bottom to top. During the process of contacting the regenerable moisture-absorbing particles, the moisture in the particles is adsorbed by the particles. The dehumidified gas is discharged from the exhaust pipe 104. The regenerable moisture-absorbing particles move from top to bottom in the annular adsorption bed chamber 102. Therefore, the particles and the blast furnace blast air to be dehumidified flowing from bottom to top form a counter-contact.

[0048] It should be noted that the central return cylinder 101, the annular adsorption bed chamber 102, and the space above them are all located in the connected gas phase space inside the dehumidification tower body 100. The central return cylinder 101 is mainly used for particle return and is not an independent airflow channel isolated from the rest of the space inside the dehumidification tower body 100. Some of the gas entering the area where the central return cylinder 101 is located is still inside the dehumidification tower body 100 and can come into contact with the regenerable moisture-absorbing particles conveyed in the central return cylinder 101. Finally, it is discharged through the corresponding exhaust path along with the airflow inside the tower body.

[0049] Example 2 Reference Figures 4-7This embodiment, based on Embodiment 1, describes the process of adjusting the particle spatial distribution state and the effective adsorption bed height under different operating speeds.

[0050] The drive mechanism 201 can adjust the rotation speed of the spiral lifting member 202. Since the centrifugal valve disc 302 is connected to the spiral lifting member 202 through the transmission rod 306, when the drive mechanism 201 changes the output speed, the spiral lifting member 202 and the centrifugal valve disc 302 change their rotation speed synchronously.

[0051] In this embodiment, the critical speed ωx of the centrifugal valve disc 302 can be determined based on factors such as the material flow state of the annular return valve port 303, the radial dimension of the annular valve edge 305, the particle size and flow characteristics of the regenerable hygroscopic particles, the friction state between the particles and the annular support surface, and the circumferential driving ability of the raised ribs 307 on the particles.

[0052] Within the normal particle circulation range, the working speed of the centrifugal valve disc 302 is divided into a low-speed working zone and a high-speed working zone, with the critical speed ωx as the boundary. The low-speed working zone corresponds to a working speed greater than zero and not greater than the critical speed ωx, while the high-speed working zone corresponds to a working speed greater than the critical speed ωx.

[0053] Figure 4 , Figure 5 The first rotational speed ω1 shown is a typical operating speed selected in the low-speed operating range. Figure 6 , Figure 7 The second rotational speed ω2 shown is a typical operating speed selected in the high-speed operating range, satisfying: 0 < ω1 ≤ ωx < ω2.

[0054] The first speed ω1 and the second speed ω2 are used to represent the representative particle balance state in the two working ranges. They do not mean that the drive mechanism 201 only has two fixed speed gears. In actual operation, the appropriate working speed can be selected in the corresponding working range according to the blast furnace blast volume, ambient air humidity and target dehumidification load.

[0055] It is worth mentioning that, in this embodiment, the particle lifting amount per unit time of the spiral lifting member 202 and the particle return amount per unit time of the particle return valve assembly 300 will change with the operating speed. However, the response characteristics of the two to the speed change are not exactly the same. The particle lifting amount of the spiral lifting member 202 is mainly related to its speed, pitch, particle filling state in the central return cylinder 101, etc. The particle return amount of the particle return valve assembly 300 is not only related to the speed of the centrifugal valve disc 302, but is also affected by the material passing capacity of the annular return valve port 303, the accumulation state of the self-forming particle throttling fluid A, the particle storage in the second particle temporary storage area S2, and the radial dimension of the annular valve edge 305.

[0056] With the device structural parameters fixed, when the centrifugal valve disc 302 is running continuously at a certain operating speed, if the particle lifting amount per unit time is greater than the particle return amount, the regenerable hygroscopic particles will gradually gather in the first particle storage area S1 and the second particle storage area S2. As the upper particle storage amount increases, the particle accumulation state on the self-forming particle throttling fluid A and the annular material support surface changes accordingly, causing the particle passing through the annular return valve port 303 and the annular valve edge 305 to return to the annular adsorption bed chamber 102 to change.

[0057] Conversely, if the amount of particles returned per unit time is greater than the amount of particles lifted, the number of particles in the first particle storage area S1 and the second particle storage area S2 gradually decreases, and the particle return state changes accordingly. Through the interaction between the particle storage and particle passing state, after running at the same operating speed for a period of time, the particle lifting and particle return tend to be basically equal, thus forming a particle balance storage amount and an effective adsorption bed height corresponding to the operating speed. Since the change in the rotation speed of the centrifugal valve disc 302 will simultaneously change the circumferential following degree, radial migration state, and the accumulation morphology of the self-forming particle throttling fluid A of the particles, the upper particle storage amount corresponding to the particle lifting and particle return reaching a basic balance at different operating speeds is different, thus forming different effective adsorption bed heights.

[0058] like Figure 4 and Figure 5 As shown, when the centrifugal valve disc 302 runs at the first speed ω1, the regenerable moisture-absorbing particles are continuously lifted to the first particle storage area S1 by the spiral lifting member 202.

[0059] Since the first rotational speed ω1 is in the low-speed working zone, the centrifugal valve disc 302 has a relatively weak ability to drive the particles circumferentially on the annular material receiving surface and to release the particles radially. Some particles can stay in the second particle storage area S2. At the same time, the self-forming particle throttling fluid A formed by the particles near the annular return valve port 303 restricts the subsequent particle passage. At this time, the radial expansion of the self-forming particle throttling fluid A is relatively small. The first particle storage area S1 and the second particle storage area S2 can maintain a relatively large amount of upper particle storage.

[0060] When the device switches from the second speed to the first speed ω1, in the initial stage of establishing the first particle balance state, the amount of particles conveyed to the upper particle storage area through the lifting outlet 203 per unit time is greater than the amount of particles that cross the radial outer edge of the annular valve edge 305 and return to the annular adsorption bed cavity 102 per unit time.

[0061] Therefore, some particles gradually transfer from the annular adsorption bed chamber 102 to the first particle temporary storage area S1 and the second particle temporary storage area S2, causing the particle content in the annular adsorption bed chamber 102 to gradually decrease, and the corresponding effective adsorption bed height to gradually decrease. As the particle temporary storage in S1 and S2 increases, the state of particles returning to the annular adsorption bed chamber 102 through the annular return valve port 303 and the centrifugal valve plate 302 also changes. When the particle lifting amount and particle return amount per unit time reach a basic balance again, the average particle content in each area tends to stabilize, forming the first particle balance state. Under the first particle balance state, the first effective adsorption bed height H1 is formed in the annular adsorption bed chamber 102.

[0062] like Figure 6 and Figure 7 As shown, when the centrifugal valve disc 302 runs at the second speed ω2, the speed of the centrifugal valve disc 302 increases, and the raised ribs 307 provided on the annular material support surface can make the regenerable moisture-absorbing particles move more fully with the centrifugal valve disc 302 in the circumferential direction, and the radial migration ability of the particles on the annular valve edge 305 is enhanced accordingly.

[0063] At this time, the self-forming particle throttling fluid A has a greater radial expansion degree relative to the first particle equilibrium state, and the particles in the second particle temporary storage area S2 are more likely to migrate to the radial outer edge of the annular valve edge 305 and return to the annular adsorption bed cavity 102.

[0064] In the initial stage after the device switches from the first speed to the second speed ω2, the amount of regenerable hygroscopic particles returning to the annular adsorption bed chamber 102 per unit time is greater than the amount of particles conveyed to the upper part through the lifting outlet 203 per unit time. Therefore, some particles that were originally temporarily stored in the first particle storage area S1 and the second particle storage area S2 gradually transfer to the annular adsorption bed chamber 102.

[0065] As the temporarily stored particles in the upper part continuously return to the annular adsorption bed chamber 102, the amount of temporarily stored particles in S1 and S2 gradually decreases, while the amount of stored particles in the annular adsorption bed chamber 102 increases. When the particles are redistributed to a state corresponding to the second rotational speed ω2, the amount of particles returned per unit time and the amount of particles lifted per unit time reach a basic balance again, thus forming a second particle balance state. In the second particle balance state, the amount of temporarily stored particles in the first particle storage area S1 and the second particle storage area S2 is less than that in the first particle balance state, while the amount of stored particles in the annular adsorption bed chamber 102 is greater than that in the first particle balance state. This forms a second effective adsorption bed height H2, which satisfies the condition: H2 > H1.

[0066] Therefore, this device does not change the height of the adsorption bed by continuously adding or discharging regenerable hygroscopic particles into the system. Instead, it changes the output speed of the drive mechanism 201 while keeping the total amount of regenerable hygroscopic particles in the system basically unchanged. This causes the particles to be redistributed among the annular adsorption bed cavity 102, the first particle storage area S1, and the second particle storage area S2, and finally forms a dynamic equilibrium state of particles corresponding to the current operating speed.

[0067] Specifically, when the blast furnace blast dehumidification load is low, the centrifugal valve disc 302 can be operated in the low-speed working zone, so that more particles are temporarily stored in S1 and S2, thereby reducing the amount of particles participating in blast dehumidification in the annular adsorption bed cavity 102 and the effective adsorption bed height, and reducing the flow resistance generated by the blast through the particle adsorption bed.

[0068] When the blast furnace blast dehumidification load increases, the output speed of the drive mechanism 201 can be increased, so that the centrifugal valve disc 302 enters the high-speed working zone, allowing more temporarily stored particles in the upper part to return to the annular adsorption bed chamber 102, thereby increasing the effective adsorption bed height and the amount of particles participating in dehumidification.

[0069] It should be noted that the critical speed ωx is not a fixed value for different specifications of devices. During the design or commissioning of the equipment, the speed of the drive mechanism 201 can be gradually changed under the condition that the total amount of particles is basically determined, and the changes in the upper particle balance temporary storage amount and the effective adsorption bed height can be observed. The speed corresponding to the transition of the state of the particles on the annular material support surface from a relatively obvious temporary storage state to a relatively obvious radial release state can be used as a reference to determine the critical speed ωx.

[0070] Example 3 Reference Figure 1 , Figures 4-7 This embodiment, based on the above embodiments, describes the heating and regeneration process of regenerable moisture-absorbing particles and the extraction and discharge process of regenerated water vapor.

[0071] The upper part of the dehumidification tower body 100 is provided with a regeneration heat exchange structure 105. The regeneration heat exchange structure 105 includes a regeneration heat exchange tube that forms a heat exchange relationship with the first particle temporary storage area S1 in at least part. A heat exchange medium with a certain temperature can be introduced into the regeneration heat exchange tube. The regenerable moisture-absorbing particles temporarily stored in the first particle temporary storage area S1 are indirectly heated through the tube wall of the regeneration heat exchange tube, so that the moisture adsorbed by the regenerable moisture-absorbing particles is gradually desorbed.

[0072] The heat exchange medium can be hot water, steam, hot gas, or heat exchange medium formed by the waste heat generated during the steel production process. The specific type can be determined based on the available heat source conditions on site and the regeneration temperature of the selected regenerable moisture-absorbing particles.

[0073] When the regenerable moisture-absorbing particles are lifted to the first particle storage area S1 by the spiral lifting member 202, some particles are temporarily stored in this area. The regeneration heat exchange structure 105 can use the residence time of the particles in the first particle storage area S1 to heat the particles, so that the particles can recover at least part of their moisture-absorbing capacity before returning to the annular adsorption bed cavity 102.

[0074] In the first particle equilibrium state, the particle equilibrium temporary storage amount in the first particle temporary storage area S1 is relatively large. Therefore, the average residence time of the regenerable hygroscopic particles through the heat action area of ​​the regeneration heat exchange structure 105 is relatively long, which is conducive to more sufficient heating and desorption of the particles.

[0075] Correspondingly, under the second particle equilibrium state, the equilibrium storage amount of particles in the first particle storage zone S1 is relatively reduced, and the speed at which particles flow back to the annular adsorption bed cavity 102 is relatively increased, so that the regenerable moisture-absorbing particles can quickly re-enter the annular adsorption bed cavity 102 to participate in the blower dehumidification under high load conditions.

[0076] Thus, while reducing the amount of working particles in the annular adsorption bed chamber 102 under low dehumidification load conditions, the device can temporarily store more particles in the upper regeneration area, providing more sufficient regeneration time for the particles; when the dehumidification load increases, the particles that have completed at least partial regeneration are released back into the annular adsorption bed chamber 102.

[0077] The top of the dehumidification tower body 100 is provided with a dehumidification pipe 106, which is connected to an external dehumidification suction component 107. The dehumidification suction component 107 is preferably an exhaust fan or an induced draft fan. The inlet of the dehumidification pipe 106 is connected to the internal space of the tower body above the first particle storage area S1. A control valve is provided on the dehumidification pipe 106. In this embodiment, the control valve is used to control the air passage between the dehumidification pipe 106 and the external dehumidification suction component 107. The control valve can be a manual valve, an electric valve or a pneumatic valve according to actual usage requirements, and its specific driving form is not limited.

[0078] During normal blast dehumidification without particle regeneration and dehumidification, the control valve on the dehumidification pipe 106 remains closed, and the dehumidification suction assembly 107 does not work. At this time, the blast furnace blast to be dehumidified enters the dehumidification tower body 100 through the air inlet pipe 103 and is mainly dehumidified through the particle adsorption bed in the annular adsorption bed chamber 102. Then it is discharged through the air outlet pipe 104. The dehumidification pipe 106 does not constitute the exhaust channel for normal blast.

[0079] When the regenerable hygroscopic particles in the first particle storage area S1 are heated by the regenerable heat exchange structure 105 and the water vapor formed by desorption needs to be discharged, the control valve on the dehumidification pipe 106 is opened and the dehumidification suction component 107 is started. Since the upper part of the annular adsorption bed chamber 102, the area where the central return cylinder 101 is located, and the area above the first particle storage area S1 are all connected gas phase spaces inside the dehumidification tower body 100, after the dehumidification suction component 107 is working, a suction effect is formed near the inlet of the dehumidification pipe 106, causing some of the gas inside the dehumidification tower body 100 to flow towards the area above the first particle storage area S1 and towards the inlet of the dehumidification pipe 106.

[0080] The water vapor generated by the desorption of regenerable moisture-absorbing particles in the first particle storage area S1 after being heated by the regeneration heat exchange structure 105 is carried by the gas and discharged from the dehumidification tower body 100 through the dehumidification pipe 106 and the dehumidification suction assembly 107.

[0081] During the above-mentioned regeneration and dehumidification process, the exhaust pipe 104 does not need to be isolated from the gas phase space inside the tower body due to the opening of the dehumidification pipe 106, and the interior of the dehumidification tower body 100 still maintains overall gas communication; the dehumidification pipe 106, as an auxiliary dehumidification branch that is opened as needed, is mainly used to extract gas with more water vapor near the first particle storage area S1.

[0082] Therefore, in this embodiment, there is no need to set up a completely sealed regeneration chamber inside the dehumidification tower body 100 that is isolated from the main blower area. The heating and desorption of the circulating moisture-absorbing particles and the discharge of water vapor can be completed by using the first particle temporary storage area S1, the regeneration heat exchange structure 105, the dehumidification pipe 106 with control valve and the dehumidification suction assembly 107.

[0083] Working principle In use, the drive mechanism 201 is started, causing the spiral lifting component 202 and the centrifugal valve disc 302 to rotate synchronously. The regenerable moisture-absorbing particles at the bottom of the annular adsorption bed chamber 102 are lifted upward through the central return cylinder 101 and return to the annular adsorption bed chamber 102 in sequence through the first particle temporary storage area S1, the annular return valve port 303, and the second particle temporary storage area S2, thus forming a continuous particle circulation. When the blast furnace blast air is dehumidified, it enters the dehumidification tower body 100 through the air inlet pipe 103, comes into contact with the regenerable moisture-absorbing particles in the annular adsorption bed chamber 102, and is discharged through the air outlet pipe 104. The particles adsorb the moisture in the blast air.

[0084] When the blast furnace blast dehumidification load is low, the centrifugal valve disc 302 operates in the low-speed working zone. At this time, the ability of particles to return to the annular adsorption bed chamber 102 through the annular return valve port 303 and the centrifugal valve disc 302 is relatively low. More particles are temporarily stored in the first particle storage area S1 and the second particle storage area S2, which reduces the particle content in the annular adsorption bed chamber 102 and forms a lower effective adsorption bed height H1, thereby reducing the blast flow resistance.

[0085] When the dehumidification load increases, the rotation speed of the centrifugal valve disc 302 is increased, which enhances the ability of particles to migrate radially outward and return to the annular adsorption bed chamber 102. The particles temporarily stored in the upper part gradually return to the annular adsorption bed chamber 102, increasing the effective adsorption bed height to H2, thereby increasing the amount of particles participating in dehumidification. After the rotation speed is switched, the particles are redistributed between the annular adsorption bed chamber 102 and the first particle temporary storage area S1 and the second particle temporary storage area S2, and finally the particle balance state is basically balanced between the particle lifting amount and the particle return amount.

[0086] During particle regeneration, the regeneration heat exchange structure 105 heats the regenerable moisture-absorbing particles in the first particle storage area S1, causing the adsorbed water to decompose and be absorbed; the control valve on the dehumidification pipe 106 is opened and the dehumidification suction component 107 is started to discharge part of the gas in the tower carrying the desorbed water vapor. When dehumidification is not required, the control valve is closed, so that the blower air is mainly discharged from the air outlet pipe 104.

[0087] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An energy-saving blast furnace blast dehumidification device, characterized in that, It includes a dehumidification tower body (100), a particle return assembly (200), a particle reflux valve assembly (300), and regenerable moisture-absorbing particles; The dehumidification tower body (100) is provided with a central return cylinder (101) and an annular adsorption bed cavity (102) surrounding the central return cylinder (101). The lower part of the central return cylinder (101) is connected to the lower part of the annular adsorption bed cavity (102). The annular adsorption bed cavity (102) is provided with an air inlet pipe (103) and an air outlet pipe (104). The regenerable moisture-absorbing particles form a particle adsorption bed in the annular adsorption bed cavity (102). The particle return assembly (200) includes a drive mechanism (201) and a spiral lifting component (202) rotatably disposed in the central return cylinder (101). The upper part of the central return cylinder (101) is provided with a lifting outlet (203). The particle return valve assembly (300) includes a guide valve cover (301) and a centrifugal valve disc (302) located below the guide valve cover (301). The centrifugal valve disc (302) is connected to the spiral lifting member (202). The upper surface of the centrifugal valve disc (302) is provided with a conical guide part (304) and an annular valve edge part (305) in a radial direction from the inside to the outside. The upper surface of the annular valve edge part (305) forms an annular material receiving surface with a radial width. An annular return valve port (303) is formed between the lower opening of the guide valve cover (301) and the conical guide part (304). A first particle storage area (S1) is formed above the feed valve cover (301), and a second particle storage area (S2) is formed correspondingly on the annular feed surface. The regenerable hygroscopic particles discharged from the lifting outlet (203) can enter the first particle storage area (S1) and enter the centrifugal valve disc (302) through the annular return valve (303). They move along the conical feed guide (304) towards the second particle storage area (S2), and return to the annular adsorption bed chamber (102) after passing the radial outer edge of the annular valve edge (305). The regenerable hygroscopic particles form a self-forming particle throttling fluid (A) on the centrifugal valve disc (302) that rotates with the centrifugal valve disc (302). The self-forming particle throttling fluid (A) is at least partially located in the particle passage area of ​​the annular return valve port (303) to restrict the passage of regenerable hygroscopic particles through the annular return valve port (303) by its accumulation state. The driving mechanism (201) can drive the spiral lifting member (202) and the centrifugal valve disc (302) to rotate at a first speed and a second speed greater than the first speed. The first speed and the second speed correspond to the first particle balance state and the second particle balance state, respectively. In the first particle balance state, the particle balance temporary storage amount in the first particle temporary storage area (S1) and the second particle temporary storage area (S2) is greater than the particle balance temporary storage amount in the second particle balance state. In the first particle balance state, the particle storage amount in the annular adsorption bed cavity (102) is less than the particle storage amount in the second particle balance state, so that the effective adsorption bed height (H1) in the first particle balance state is less than the effective adsorption bed height (H2) in the second particle balance state.

2. The energy-saving blast furnace blast dehumidification device according to claim 1, characterized in that: The centrifugal valve disc (302) is connected to the spiral lifting member (202) via at least one transmission rod (306). The transmission rod (306) passes through the area where the annular return valve port (303) is located, so that the centrifugal valve disc (302) and the spiral lifting member (202) rotate synchronously.

3. The energy-saving blast furnace blast dehumidification device according to claim 2, characterized in that: A plurality of raised ribs (307) are fixedly provided on the annular material-bearing surface of the annular valve edge (305). The plurality of raised ribs (307) are distributed at intervals around the rotation axis of the centrifugal valve disc (302) so as to drive the regenerable moisture-absorbing particles located on the annular material-bearing surface to rotate with the centrifugal valve disc (302) during the rotation of the centrifugal valve disc (302). In the first particle equilibrium state, the radial expansion of the self-forming particle throttling fluid (A) is less than that in the second particle equilibrium state.

4. The energy-saving blast furnace blast dehumidification device according to claim 1, characterized in that: The drive mechanism (201) is an adjustable speed drive mechanism. The working speed of the centrifugal valve disc (302) is divided into a low-speed working area and a high-speed working area based on the critical speed ωx. The low-speed working area corresponds to a working speed that is greater than zero and not greater than the critical speed ωx, and the high-speed working area corresponds to a working speed that is greater than the critical speed ωx. The first rotational speed is located in the low-speed operating range, and the second rotational speed is located in the high-speed operating range.

5. The energy-saving blast furnace blast dehumidification device according to claim 1, characterized in that: After switching from the second speed to the first speed, during the process of establishing the first particle balance state, the amount of regenerable moisture-absorbing particles discharged through the lifting outlet (203) per unit time is greater than the amount of regenerable moisture-absorbing particles returned to the annular adsorption bed cavity (102) per unit time, so that the regenerable moisture-absorbing particles are transferred from the annular adsorption bed cavity (102) to the first particle temporary storage area (S1) and the second particle temporary storage area (S2) until the particle lifting amount and the particle return amount are basically equal; After switching from the first speed to the second speed, during the process of establishing the second particle balance state, the amount of regenerable hygroscopic particles returning to the annular adsorption bed cavity (102) per unit time is greater than the amount of regenerable hygroscopic particles discharged through the lifting outlet (203) per unit time, so that the regenerable hygroscopic particles in the first particle storage area (S1) and the second particle storage area (S2) are transferred to the annular adsorption bed cavity (102) until the particle return amount is basically equal to the particle lifting amount.

6. The energy-saving blast furnace blast dehumidification device according to claim 1, characterized in that: The annular valve edge (305) extends along the radial space between the central return cylinder (101) and the annular adsorption bed cavity (102) to form the annular material receiving surface on the radially outer side of the conical guide section (304); The effective cross-sectional area of ​​the annular adsorption bed chamber (102) is greater than the effective cross-sectional area of ​​the central return cylinder (101).

7. The energy-saving blast furnace blast dehumidification device according to claim 1, characterized in that: The upper part of the dehumidification tower body (100) is provided with a regeneration heat exchange structure (105). The regeneration heat exchange structure (105) includes a regeneration heat exchange tube that forms a heat exchange relationship with the first particle storage area (S1) in at least part. The regeneration heat exchange tube is used to indirectly heat the regenerable moisture-absorbing particles temporarily stored in the first particle storage area (S1) through the heat exchange medium flowing inside it.

8. The energy-saving blast furnace blast dehumidification device according to claim 7, characterized in that: In the first particle equilibrium state, the particle equilibrium temporary storage amount in the first particle temporary storage area (S1) is greater than the particle equilibrium temporary storage amount in the first particle temporary storage area (S1) in the second particle equilibrium state, and the average residence time of the regenerable hygroscopic particles in the thermal action area of ​​the regenerable heat exchange structure (105) in the first particle equilibrium state is greater than the average residence time in the second particle equilibrium state.

9. The energy-saving blast furnace blast dehumidification device according to claim 7, characterized in that: The top of the dehumidification tower (100) is provided with a dehumidification pipe (106), the dehumidification pipe (106) is provided with a control valve, and the dehumidification pipe (106) is connected to an external dehumidification suction assembly (107). The inlet of the dehumidification pipe (106) is connected to the internal space of the tower above the first particle storage area (S1). The upper part of the annular adsorption bed chamber (102) is connected to the gas space inside the tower above the first particle storage area (S1); under normal blower dehumidification state, the control valve is closed so that the gas entering the dehumidification tower (100) is discharged through the air outlet pipe (104); under particle regeneration dehumidification state, the control valve is opened and the dehumidification suction assembly (107) is operated so that some of the gas in the dehumidification tower (100) flows to the top of the first particle storage area (S1) and carries the water vapor generated by the thermal desorption of regenerable moisture-absorbing particles and is discharged through the dehumidification pipe (106).

10. The energy-saving blast furnace blast dehumidification device according to claim 1, characterized in that: A breathable material barrier net (108) is fixedly installed inside the dehumidification tower body (100). An annular air duct is formed between the breathable material barrier net (108) and the inner wall of the dehumidification tower body (100). The air inlet pipe (103) is connected to the annular air duct. The annular air duct is connected to the annular adsorption bed chamber (102) through the breathable material barrier net (108). The air outlet pipe (104) is connected to the upper part of the annular adsorption bed cavity (102) so that the blast furnace air to be dehumidified passes through the particle adsorption bed from bottom to top, and the regenerable moisture-absorbing particles move from top to bottom in the annular adsorption bed cavity (102).

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