Iron-making flue gas desulfurization equipment

Abstract

The present application relates to the technical field of flue gas desulfurization, and discloses a flue gas desulfurization equipment for iron making, which comprises a dust removal tank, wherein the dust removal tank is provided with a dust removal cavity, the bottom of the dust removal cavity is provided with a flue gas inlet, the side of the dust removal cavity is provided with a washing liquid inlet, the top of the dust removal cavity is provided with a dust removal outlet, a stirring part is rotatably arranged in the dust removal cavity, a spray tank is arranged on one side of the dust removal tank, the spray tank is provided with a spray cavity, the spray cavity is provided with a dust removal inlet, a gas outlet and a liquid outlet, the liquid outlet is connected to the washing liquid inlet, a plurality of partitions are arranged in the spray cavity, the partitions are arranged in the spray cavity in sequence, a separation cavity is formed between any two adjacent partitions, a plurality of separation cavities form a serpentine channel, and a spray head is arranged on each partition and located on the lower side of the partition. Through the above technical scheme, the problem of poor desulfurization effect of the flue gas desulfurization equipment for iron making in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas desulfurization, and in particular to a flue gas desulfurization device for ironmaking. Background Art

[0002] In the iron and steel industry, flue gas desulfurization is a crucial environmental protection link. Traditional flue gas desulfurization equipment and methods have many defects and shortcomings.

[0003] Early dry desulfurization technologies mostly used solid desulfurizers to directly react with flue gas. While this method has the advantage of a relatively simple equipment structure, its desulfurization efficiency is extremely low. Due to the limited contact area between the solid desulfurizer and the flue gas and the slow reaction rate, it is difficult to fully remove sulfur oxides from the flue gas. In large-scale iron and steel production, large amounts of sulfur-containing flue gas are directly discharged without effective treatment, causing serious pollution to the atmospheric environment, triggering environmental problems such as acid rain, and endangering ecological balance and human health. At the same time, the desulfurization products produced by dry desulfurization are mostly solid waste, which is difficult to handle and requires specialized landfill or treatment sites, increasing the company's environmental protection costs and operational burden.

[0004] The subsequent emergence of wet desulfurization technology, while improving desulfurization efficiency to a certain extent, also faced numerous challenges. Traditional wet desulfurization equipment suffers from low desulfurization fluid utilization, with large amounts of fluid being discharged after a single use. This not only wastes valuable resources but also increases costs for companies in desulfurization fluid procurement and waste disposal. Summary of the Invention

[0005] The present invention provides a flue gas desulfurization device for ironmaking, which solves the problem of poor desulfurization effect of the flue gas desulfurization device for ironmaking in the related art.

[0006] The technical solutions of the present invention are as follows:

[0007] A flue gas desulfurization device for ironmaking, comprising:

[0008] A dust removal tank, wherein the dust removal tank has a dust removal cavity, a flue gas inlet at the bottom of the dust removal cavity, an eluent inlet at the side, and a dust removal outlet at the top of the dust removal cavity;

[0009] a stirring member, the stirring member being rotatably disposed in the dust removal chamber;

[0010] A spray tank, the spray tank being arranged on one side of the dust removal tank, the spray tank having a spray chamber, the spray chamber having a dust removal inlet, a gas outlet and a liquid outlet, the liquid outlet leading to the eluent inlet;

[0011] A partition is provided in the spray chamber. There are a plurality of partitions arranged in sequence in the spray chamber. A partition chamber is formed between two adjacent partitions. A plurality of the partition chambers form a serpentine channel.

[0012] A shower head is provided on the partition and is located at the lower side of the partition.

[0013] As a further technical solution, the liquid outlet is higher than the eluent inlet, the dust removal chamber further has an acid outlet, the eluent inlet is located below the liquid level of the dust removal chamber, the liquid outlet is located above the liquid level of the dust removal chamber, and the acid outlet is located on the side of the flue gas inlet, further comprising:

[0014] a connecting pipe, the connecting pipe being obliquely arranged on the dust removal tank and being used for connecting the liquid outlet with the eluent inlet;

[0015] A flue gas duct leads to the flue gas inlet.

[0016] As a further technical solution, the stirring member includes:

[0017] a rotating shaft, the rotating shaft being rotatably disposed in the dust removal chamber;

[0018] a scraper, the scraper being arranged on the rotating shaft, the scraper having a scraping portion, the scraping portion being arranged in contact with the inner wall of the dust removal chamber, and a cavity being formed between the scraper and the rotating shaft;

[0019] A crushing member is arranged in the cavity and on the scraper. A plurality of crushing members are arranged in an array and are used to crush bubbles formed by the gas entering the flue gas inlet.

[0020] As a further technical solution, the scraper has an arc-shaped clearance portion, the arc-shaped clearance portion forms a clearance space, and the flue gas duct is a U-shaped tube, further comprising:

[0021] The buffer is a hemispherical shell, which is inverted and arranged on one side of the smoke inlet. The buffer is provided with a clearance groove around it, and the clearance groove is used for gas to diffuse from the smoke inlet to the clearance space.

[0022] As a further technical solution, there are a plurality of scrapers arranged in a circle on the rotating shaft. The scrapers are spiral scrapers, and the crushing piece has the same shape as the scraper.

[0023] As a further technical solution, it also includes:

[0024] A pressurizing assembly, the pressurizing assembly being arranged on one side of the dust removal tank and leading to the flue gas duct;

[0025] A dust removal atomizing nozzle is arranged at the upper end of the dust removal chamber and located on one side of the dust removal outlet.

[0026] As a further technical solution, the scraper is arranged at an angle to the inner wall of the dust removal chamber.

[0027] As a further technical solution, it also includes:

[0028] a liquid discharge member, the liquid discharge member being arranged on the acid liquid outlet;

[0029] The acid liquid outlet leads to the sedimentation tank through the drainage piece, and the sedimentation tank is used to treat the mud-containing acid liquid.

[0030] As a further technical solution, the flue gas duct has a cleaning hole in the middle, and further comprises:

[0031] a pressure valve, the pressure valve being arranged at one end of the flue gas duct and being used to control the connection between the flue gas duct and the pressurizing component or to cancel the connection;

[0032] A drain valve is provided on the cleaning hole and is used to open or cancel opening of the cleaning hole.

[0033] As a further technical solution, a liquid holding cavity is formed between the lowermost partition and the spray cavity, the liquid holding cavity has the liquid outlet, and the liquid outlet is also provided with a pressure valve, further comprising:

[0034] A scraper is slidably arranged in the partition cavity, the scraper abuts against the partition, and there are several scrapers, which are respectively arranged in several partition cavities and are used to clean the top of the partition.

[0035] The working principle and beneficial effects of the present invention are:

[0036] In the present invention, a flue gas inlet is provided at the bottom of the dust removal chamber of the dust removal tank, and an eluent inlet is provided on the side. This layout allows the dust-containing and sulfur-containing flue gas to fully contact with the eluent injected from the side after entering the dust removal chamber. The rotating stirring piece arranged in the dust removal chamber can further enhance the mixing effect of the flue gas and the eluent. The stirring piece breaks the large bubbles of the flue gas by continuous stirring to form a number of small bubbles, so that the two react more fully on a larger contact area, making the dust particles easier to be adsorbed and entrained by the eluent, and also helps pollutants such as sulfur oxides in the flue gas to chemically react with the desulfurization components in the eluent, thereby achieving efficient dust removal and preliminary desulfurization functions, laying a good foundation for subsequent further desulfurization treatment, effectively reducing the content of dust and sulfur oxides discharged into the atmosphere, reducing pollution to the environment, and ensuring that ironmaking production meets environmental protection requirements.

[0037] Several baffles are installed inside the spray tank to form a serpentine channel, forcing the flue gas from the dust removal tank to flow along a tortuous path within the spray chamber. This design prolongs the residence time of the flue gas in the spray chamber and increases the contact time between the flue gas and the liquid in the spray chamber. This allows more time for harmful substances such as sulfur oxides in the flue gas to fully react with the spray liquid, further improving desulfurization efficiency. At the same time, the spray heads installed on the underside of the baffles can evenly spray the spray liquid within the serpentine channel, ensuring that the flue gas is fully exposed to fresh spray liquid at every point it passes through. This achieves all-round, multi-level spray scrubbing, maximizing the removal of sulfur from the flue gas and ensuring that the treated flue gas meets more stringent emission standards, effectively protecting ambient air quality and reducing the root causes of environmental problems such as acid rain. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The preferred embodiments will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0039] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0040] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of A in the middle;

[0041] Figure 3 for Figure 1 Schematic diagram of the enlarged structure of B;

[0042] Figure 4 Schematic diagram of the structure of the rotating part in the present invention;

[0043] Figure 5 Schematic diagram of the cross-sectional structure of the rotating member in the present invention;

[0044] Figure 6 It is a schematic diagram of the structure of the present invention;

[0045] In the figure: Dust removal tank 1, dust removal chamber 101, flue gas inlet 102, eluent inlet 103, dust removal outlet 104, acid liquid outlet 105, stirring element 2, rotating shaft 201, scraper 202, scraping part 203, cavity 204, crushing element 205, arc-shaped clearance part 206, clearance space 207, spray tank 3, spray chamber 301, dust removal inlet 30 2, gas outlet-303, liquid outlet-304, liquid chamber-305, partition-4, partition chamber-401, spray head-5, connecting pipe-6, flue gas duct-7, cleaning hole-701, buffer part-8, give way groove-801, pressurizing component-9, dust removal atomizing nozzle-10, drainage part-11, sedimentation tank-12, pressure valve-13, drainage valve-14, scraper part-15. DETAILED DESCRIPTION

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive work.

[0047] To simplify the drawings, only portions relevant to the invention are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0048] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0049] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0050] Reference Figures 1 to 6, which is the first embodiment of the present invention, proposes a flue gas desulfurization device for ironmaking, including a dust removal tank 1, the dust removal tank 1 has a dust removal chamber 101, the bottom of the dust removal chamber 101 has a flue gas inlet 102, the side has an eluent inlet 103, the top of the dust removal chamber 101 has a dust removal outlet 104, a stirring member 2 is rotatably arranged in the dust removal chamber 101, a spray tank 3 is arranged on one side of the dust removal tank 1, the spray tank 3 has a spray chamber 301, the spray chamber 301 has a dust removal inlet 302, a gas outlet 303 and a liquid outlet 304, the liquid outlet 304 leads to the eluent inlet 103, a partition 4 is arranged in the spray chamber 301, there are multiple partitions 4, which are arranged in sequence in the spray chamber 301, a partition chamber 401 is formed between two adjacent partitions 4, and the multiple partition chambers 401 form a serpentine channel, and a spray head 5 is arranged on the partition 4 and located at the lower side of the partition 4.

[0051] In this embodiment, a flue gas inlet 102 is provided at the bottom of the dust removal chamber 101 of the dust removal tank 1, and an eluent inlet 103 is provided on the side. This layout allows the dust-containing and sulfur-containing flue gas to fully contact with the eluent injected from the side after entering the dust removal chamber 101. The rotating stirring element 2 set in the dust removal chamber 101 can further enhance the mixing effect of the flue gas and the eluent. The stirring element 2 breaks the large bubbles of the flue gas into several small bubbles through continuous stirring, so that the two react with a larger contact area and to a more sufficient extent, making the dust particles easier to be adsorbed and entrained by the eluent. At the same time, it also helps pollutants such as sulfur oxides in the flue gas to chemically react with the desulfurization components in the eluent, thereby achieving efficient dust removal and preliminary desulfurization functions, laying a good foundation for subsequent further desulfurization treatment, effectively reducing the content of dust and sulfur oxides discharged into the atmosphere, reducing pollution to the environment, and ensuring that ironmaking production meets environmental protection requirements.

[0052] Several partitions 4 are provided in the spray tank 3 to form a serpentine channel, so that the flue gas from the dust removal tank 1 needs to flow along a tortuous path in the spray chamber 301. This design prolongs the residence time of the flue gas in the spray chamber 301 and increases the contact time between the flue gas and the liquid in the spray chamber 301, allowing more time for harmful substances such as sulfur oxides in the flue gas to fully react with the spray liquid, further improving the desulfurization efficiency. At the same time, the spray head 5 installed on the lower side of the partition 4 can evenly spray the spray liquid in the serpentine channel, ensuring that the flue gas can fully contact the fresh spray liquid at every point it flows through, achieving all-round, multi-level spray washing, and removing the sulfur component in the flue gas to the greatest extent, so that the treated flue gas meets more stringent emission standards, effectively protecting the ambient air quality, and reducing the root causes of environmental problems such as acid rain.

[0053] The liquid outlet 304 of the spray tank 3 leads to the eluent inlet 103 of the dust removal tank 1. This design allows for the recycling of the eluent. The liquid after the desulfurization reaction in the spray tank 3 still contains a certain amount of desulfurization components that can continue to function, as well as suspended matter that has adsorbed dust. This liquid is then fed into the dust removal tank 1 for reuse as eluent. This not only reduces the amount of fresh eluent used and lowers the company's procurement costs for desulfurization reagents, but also fully utilizes the active ingredients in the liquid, avoiding resource waste and improving the economic efficiency of the entire desulfurization equipment. This can result in significant long-term operating cost savings, especially for large-scale, long-term ironmaking enterprises.

[0054] The recycling of the eluent reduces the frequency of liquid renewal within the equipment to a certain extent, correspondingly reducing the effects of corrosion and wear on the equipment caused by frequent liquid replacement, thereby extending the service life of the dust removal tank 1, spray tank 3, and internal components such as the stirring element 2, baffle 4, and spray head 5. Furthermore, while achieving efficient desulfurization, the structural design of this equipment features a relatively reasonable layout of various components, making it less susceptible to component damage caused by excessive local pressure or rapid flow rates. This reduces the frequency of repair and component replacement, further saving equipment maintenance costs and improving the overall cost-effectiveness of the equipment. This allows enterprises to better control operating costs and enhance market competitiveness while meeting environmental protection requirements for flue gas desulfurization.

[0055] The stirring element 2 is rotatably arranged in the dust removal chamber 101, and can stabilize the flow field in the dust removal chamber 101 during operation. When the flue gas and eluent continuously enter the dust removal chamber 101, flow field disorder and local turbulence are likely to occur. However, the stirring element 2 continuously rotates to make the fluid mixing in the chamber more uniform and orderly, avoiding problems such as dust and flue gas not being able to fully contact the eluent and insufficient reaction due to unstable flow field, ensuring the stable progress of the dust removal and desulfurization process, improving the reliability of equipment operation, and ensuring that the dust removal and desulfurization functions can be continuously and effectively exerted under different working conditions such as flue gas flow rate and eluent flow rate, and maintaining good working performance of the equipment.

[0056] Furthermore, the liquid outlet 304 is higher than the eluent inlet 103, and the dust removal chamber 101 also has an acid liquid outlet 105. The eluent inlet 103 is located below the liquid level of the dust removal chamber 101, and the liquid outlet 304 is located above the liquid level of the dust removal chamber 101. The acid liquid outlet 105 is located on one side of the flue gas inlet 102. It also includes a connecting pipe 6, which is obliquely arranged on the dust removal tank 1 for connecting the liquid outlet 304 with the eluent inlet 103, and the flue gas pipe 7 leads to the flue gas inlet 102.

[0057] In this embodiment, the liquid outlet 304 is higher than the eluent inlet 103 and is connected through an inclined connecting pipe 6, which cleverly utilizes the gravity generated by the liquid level difference to achieve the natural flow of the eluent. The liquid that has participated in the desulfurization reaction in the spray tank 3 can, by its own gravity, flow smoothly from the higher liquid outlet 304 along the connecting pipe 6 to the lower eluent inlet 103, and re-enter the dust removal chamber 101 to participate in the next round of dust removal and desulfurization process. This circulation method driven by natural gravity does not require additional power equipment such as water pumps to transport the eluent, which greatly reduces the energy consumption cost of equipment operation. Especially for production scenarios such as ironmaking that require long-term and large-scale flue gas treatment, it can save considerable energy costs in the long term. At the same time, the natural circulation system is relatively more stable and reliable, effectively avoiding the problem of eluent circulation interruption due to emergencies such as power equipment failure and power outages, ensuring the continuity of the entire desulfurization process, so that the flue gas can be continuously and stably effectively dust-removed and desulfurized, maintaining a good environmental protection effect.

[0058] The eluent inlet 103 is located below the liquid level of the dust removal chamber 101. This design allows the eluent flowing in from the connecting pipe 6 to directly dissolve into the liquid layer in the dust removal chamber 101, achieving full and close contact with the flue gas entering from the flue gas inlet 102. When the flue gas enters the dust removal chamber 101, it will form bubbles and other forms below the liquid level to mix with the eluent. The eluent inlet 103 located below the liquid level can ensure that the newly flowing eluent quickly participates in this mixed system, increasing the contact area and contact time between the two, making it easier for dust particles in the flue gas to be adsorbed and entrained by the eluent, and also promoting pollutants such as sulfur oxides to react more fully with the desulfurization components in the eluent, thereby significantly improving the efficiency of dust removal and desulfurization, further reducing the content of pollutants discharged into the atmosphere, and better meeting increasingly stringent environmental protection requirements.

[0059] The acid liquid outlet 105 is located on the side of the flue gas inlet 102, which has good synergy from the perspective of the overall process flow. During actual operation, while the flue gas enters the dust removal chamber 101 from the flue gas inlet 102, the acid liquid can be discharged from the acid liquid outlet 105 on the same side. This layout is more reasonable and convenient in terms of space and operational process, making it easier for operators to simultaneously manage and monitor the introduction of flue gas and the discharge of acid liquid. It reduces problems such as pipe crossing and operational inconvenience caused by unreasonable layout, improves the efficiency of the operation and maintenance of the entire desulfurization equipment, and makes the connection between various links smoother, ensuring that the flue gas desulfurization equipment for ironmaking can function stably and efficiently, achieving continuous and effective treatment of flue gas and proper disposal of acid liquid.

[0060] The inclined connecting pipe 6, as a key component connecting the spray tank 3 and the dust removal tank 1, cooperates with other structures of the entire desulfurization equipment to further enhance the overall stability of the equipment. On the one hand, while realizing the eluent circulation function, the connecting pipe 6, through a reasonable inclination angle and a stable connection method, shares part of the stress generated by factors such as liquid flow and temperature changes during the operation of the equipment, ensures the firmness of the connection between the spray tank 3 and the dust removal tank 1, avoids problems such as loosening and deformation of components due to local uneven force, and improves the durability of the equipment; on the other hand, the connecting pipe 6 and other structures such as the flue gas duct 7 and the acid outlet 105 together constitute a complete and orderly system, which optimizes the fluid flow and material handling process inside the equipment, so that the entire desulfurization equipment can maintain a good operating state when dealing with various complex working conditions such as different flue gas flow rates and temperature changes, and continuously play the role of dust removal and desulfurization, thereby improving the overall performance and reliability of the equipment.

[0061] Furthermore, the stirring member 2 includes a rotating shaft 201, which is rotatably arranged in the dust removal chamber 101, and a scraper 202 is arranged on the rotating shaft 201. The scraper 202 has a scraping portion 203, and the scraping portion 203 is arranged in contact with the inner wall of the dust removal chamber 101. A cavity 204 is formed between the scraper 202 and the rotating shaft 201. A crushing member 205 is arranged in the cavity 204 and on the scraper 202. The crushing members 205 are arranged in a plurality and are used to crush bubbles formed by the gas entering the flue gas inlet 102.

[0062] In this embodiment, the scraping portion 203 of the scraper 202 abuts the inner wall of the dust removal chamber 101. As the rotating shaft 201 drives the scraper 202 to rotate, it can effectively scrape away dust, impurities, and sediments produced by chemical reactions that adhere to the inner wall of the dust removal chamber 101. During the flue gas desulfurization process, the eluent and flue gas continuously react, and some dust particles and solid matter generated by the reaction easily adhere to the inner wall. If accumulated over a long period of time, this reduces the effective reaction space within the chamber and prevents the flue gas from fully contacting the eluent. The continuous scraping action of the scraper 202 can constantly keep the inner wall clean, increase the contact area between the flue gas and the eluent, and ensure that the two are fully mixed and reacted. This makes it easier for dust to be removed by the eluent, and sulfur oxides can also better react with the desulfurization components in the eluent, significantly improving the dust removal and desulfurization efficiency, ensuring that the discharged flue gas better meets environmental emission standards, and reducing pollution to the atmospheric environment. Scraper 202 continuously cleans the fluid within the cavity, ensuring a relatively smooth and uniform flow field. This ensures consistent mixing and reaction between the flue gas and eluent, and improves the reliability of the equipment. Regardless of changes in operating conditions such as flue gas flow and eluent flow during the ironworks' production process, the equipment maintains stable and efficient operation, reducing the risk of equipment failure due to unstable flow fields and extending its service life.

[0063] The crushing element 205 is arranged in the cavity 204 formed by the scraper 202 and the rotating shaft 201, and can crush the bubbles formed after entering from the flue gas inlet 102, which has a key impact on the desulfurization effect. When the flue gas enters the dust removal chamber 101 and mixes with the eluent, a large number of bubbles will be generated. If the bubbles are too large and do not break for a long time, the flue gas inside the bubbles cannot fully contact the eluent, and the pollutants such as sulfur oxides therein are difficult to participate in the desulfurization reaction, resulting in incomplete desulfurization. The crushing element 205 breaks the bubbles into many small bubbles, greatly increasing the total surface area of ​​the bubbles, so that the flue gas in the bubbles can more comprehensively and fully contact and react with the eluent, thereby removing the sulfur component in the flue gas to the greatest extent, improving the depth and accuracy of desulfurization, better meeting strict environmental protection requirements, effectively protecting the surrounding atmospheric environment quality, and reducing the possibility of environmental problems such as acid rain.

[0064] The crushing action of the crushing element 205 on bubbles reduces the impact on the equipment to a certain extent. Without bubble crushing, large bubbles would generate a large impact force when they burst. This would act on the inner wall of the equipment, the stirring element 2, and other components for a long time, easily causing surface wear and corrosion of the components, affecting the durability of the equipment. However, after the crushing element 205 breaks the bubbles into small sizes, the impact force generated by the bubble burst is dispersed and relatively reduced, reducing damage to the equipment. This allows components such as the dust removal tank 1 and the internal stirring element 2 to operate in a relatively mild working environment, extending the service life of each component, reducing the frequency of repairs and replacements due to equipment damage, saving equipment maintenance costs, and improving the economy and reliability of the entire desulfurization equipment.

[0065] The structural design of the stirring element 2, which is composed of a rotating shaft 201, a scraper 202 and a crushing element 205, is highly rational and coordinated. The rotating shaft 201 serves as the core support and power transmission component, driving the scraper 202 to rotate to achieve the wall scraping function, while creating a suitable movement environment for the crushing element 205; the scraper 202 completes the cleaning task by contacting the cavity wall, and cooperates with the rotating shaft 201 to form a cavity 204 to accommodate the crushing element 205; the crushing element 205 plays the role of crushing bubbles in the cavity 204. The various components cooperate and work together to jointly build a functional stirring system, optimize the mixing and reaction process in the dust removal chamber 101, and improve the overall dust removal and desulfurization performance of the equipment. Moreover, this structure is more reasonable in space utilization, compact and orderly, and will not cause mutual interference problems due to improper component layout, ensuring that the stirring element 2 operates stably and efficiently in the dust removal chamber 101, and adapting to the desulfurization needs of ironmaking flue gas of different specifications and different working conditions.

[0066] Furthermore, the scraper 202 has an arc-shaped give-way portion 206, which forms a give-way space 207. The flue gas duct 7 is a U-shaped tube and also includes a buffer 8. The buffer 8 is a hemispherical shell, which is inverted and arranged on one side of the flue gas inlet 102. The buffer 8 has give-way grooves 801 around it. The give-way grooves 801 are used for the diffusion of gas from the flue gas inlet 102 to the give-way space 207.

[0067] In this embodiment, the flue gas duct 7 adopts a U-shaped tube design, which can, to a certain extent, provide a buffering and flow stabilization effect on the incoming dust- and sulfur-containing flue gas. When the flue gas flows within the U-shaped tube, the change in its flow direction and the detour within the tube allow the flue gas flow rate and impact force to be initially adjusted, preventing the flue gas from rushing directly into the dust removal chamber 101 in an overly rapid and violent manner, thereby reducing the impact on the various components within the dust removal chamber 101. The buffer member 8 is disposed within the dust removal chamber 101 and within the clearance space 207 of the scraper 202, further enhancing the buffering effect. The inverted shape of the hemispherical shell and the clearance grooves 801 provided on all sides allow the gas entering from the flue gas inlet 102 to first enter the clearance space 207 of the buffer member 8, and then diffuse more smoothly into the interior of the dust removal chamber 101 through the clearance grooves 801. This double buffering mechanism allows the flue gas to be dispersed more evenly and steadily when entering the dust removal chamber 101, ensuring the stability of the subsequent mixing and reaction process of the flue gas and the eluent, and preventing the fluid in the chamber from being disturbed due to excessive air intake, which affects the dust removal and desulfurization effect.

[0068] Without these buffering designs, dust- and sulfur-laden flue gas would directly rush into the dust removal chamber 101 at high speed, exerting a large impact force on the agitator 2, inner wall, and other components in the chamber. Long-term effects could easily cause wear and corrosion on the surface of the components, shortening the service life of the equipment. The presence of the U-shaped tube and buffer 8 effectively reduces the impact force of the flue gas, making the external forces borne by the various components of the equipment more gentle and reducing the risk of damage caused by impact. For example, for agitators 2 such as the rotating shaft 201 and scraper 202, problems such as loosening and deformation caused by frequent and strong flue gas impacts are avoided, extending their normal service life. For the inner wall of the dust removal chamber 101, the wear and corrosion rate caused by high-speed flue gas scouring is also reduced, ensuring the structural integrity of the equipment. Overall, the service life of the entire flue gas desulfurization equipment for ironmaking is extended, reducing the company's cost expenditures for equipment maintenance and component replacement.

[0069] The clearance space 207 formed by the arc-shaped clearance portion 206 on the scraper 202 provides a reasonable installation position for the buffer 8, so that the buffer 8 can be just on the side of the flue gas inlet 102 to effectively buffer and guide the incoming flue gas. This layout makes full use of the space inside the equipment, combines the buffering function with the structure of the scraper 202, avoids occupying too much extra space in the dust removal chamber 101, and also makes the flue gas intake path more reasonable and orderly. After the gas enters from the flue gas inlet 102, it undergoes preliminary adjustment by the U-shaped tube, and then is further processed by the buffer 8 in the clearance space 207 by the buffer 8. It can smoothly enter the main area of ​​the dust removal chamber 101 along the designed path and fully contact with the eluent, thereby improving the efficiency and effect of the entire equipment in treating the flue gas, optimizing the distribution of the flue gas in the dust removal chamber 101, and ensuring that the flue gas in each area can be fully desulfurized.

[0070] After being buffered by the U-shaped tube and the buffer 8, the flue gas enters the dust removal chamber 101 in a stable and uniform state, and its contact with the eluent is more complete and uniform. During the desulfurization process, the eluent needs to fully contact with pollutants such as sulfur oxides in the flue gas in order to undergo an effective chemical reaction and remove the sulfur component. Smooth air intake avoids the problem of insufficient reaction caused by local flue gas concentration being too high or too low, too fast flow rate, etc., so that each part of the eluent can play a better role, maximizing the adsorption of entrained dust particles and reaction with sulfur oxides, improving the efficiency of dust removal and desulfurization, allowing the exhausted flue gas to better meet environmental emission standards, reduce pollution to the atmospheric environment, meet increasingly stringent environmental protection requirements, and help iron and steel plants achieve green production.

[0071] Reasonable air intake buffer design can also improve the overall environment in the dust removal chamber 101 and further enhance the dust removal and desulfurization effect. By making the flue gas enter evenly and smoothly, the splashing of the eluent and the disturbance of the local liquid layer caused by the impact of the air intake are avoided, the relative stability of the eluent level in the chamber is maintained, and the stirring element 2 and other components are guaranteed to work normally in a stable liquid layer environment. At the same time, it also reduces the uneven distribution of dust in the chamber due to unstable air intake, making it easier for dust to be captured and removed by the eluent. A good environment that is more conducive to dust removal and desulfurization is formed inside the entire dust removal chamber 101. The various links cooperate and work together to improve the overall treatment effect of the equipment on the flue gas, ensure that the quality of the flue gas discharged by the iron and steel plant continues to meet the standards, and contribute to the protection of the surrounding air quality.

[0072] Furthermore, there are a plurality of scrapers 202 arranged in a circle on the rotating shaft 201 . The scrapers 202 are spiral scrapers 202 , and the crushing members 205 have the same shape as the scrapers 202 .

[0073] In this embodiment, a plurality of scrapers 202 are provided and arranged circumferentially on the rotating shaft 201. This arrangement allows for a wider and more uniform stirring range, fully covering the cross-sectional area of ​​the dust removal chamber 101. Driven by the rotating shaft 201, the scrapers 202 work in coordination to fully stir the flue gas and eluent within the dust removal chamber 101. The design of the scrapers 202 as spiral scrapers 202 further enhances the stirring effect. The spiral shape not only causes the flue gas and eluent to be flipped up and down during rotation, but also produces an axial conveying effect, allowing the flue gas and eluent to form a complex flow path within the dust removal chamber 101, increasing the contact area and contact time between the two, promoting better adsorption of dust particles by the eluent, and allowing pollutants such as sulfur oxides to more fully react chemically with the desulfurization components in the eluent, thereby significantly improving the efficiency of dust removal and desulfurization, ensuring that the discharged flue gas better meets environmental emission standards and reduces pollution to the atmospheric environment.

[0074] The crushing element 205 has the same shape as the scraper 202, also in a spiral shape. This design enables them to work together better in terms of function, further improving the desulfurization effect. When the flue gas enters the dust removal chamber 101 and mixes with the eluent to produce bubbles, the spiral-shaped crushing element 205 is in the cavity 204 formed by the scraper 202 and the rotating shaft 201. As the rotating shaft 201 rotates, it can not only stir the fluid in the cavity like the scraper 202, but also crush the bubbles more effectively. When rotating, the spiral structure will cut and squeeze the bubbles passing through, breaking the bubbles into smaller sizes, increasing the surface area of ​​the bubbles, and allowing the flue gas in the bubbles to more fully contact and react with the eluent, thereby maximizing the removal of sulfur components in the flue gas, improving the thoroughness of desulfurization, better meeting strict environmental protection requirements, and helping to protect the quality of the surrounding atmospheric environment and reduce the occurrence of environmental problems such as acid rain.

[0075] The spiral scrapers 202 are arranged circumferentially on the rotating shaft 201, and their force distribution is relatively more uniform. In the process of the rotating shaft 201 driving the scrapers 202 to rotate and stir, the forces such as the resistance from the flue gas and the eluent and the friction between the scrapers 202 and the cavity wall can be dispersed by arranging them in a circular manner, thus avoiding the problems of deformation, damage of the scrapers 202 or eccentricity of the rotating shaft 201 due to excessive local force, which affect the normal operation of the equipment. This uniform force characteristic ensures that the stirring element 2 can stably and continuously stir the fluid in the dust removal chamber 101 and maintain a good mixing and reaction state in the chamber. No matter how the working conditions such as the flue gas flow rate and the eluent flow rate change during the production process of the iron and steel plant, the equipment can rely on stable stirring to operate, ensure the consistency of the dust removal and desulfurization effect, improve the reliability of the equipment operation, reduce the risk of equipment failure caused by unstable stirring, and extend the service life of the equipment.

[0076] The crushing element 205 is of the same shape as the spiral scraper 202 and works in conjunction with it, which helps to maintain the stability of the fluid flow in the dust removal chamber 101. During the rotation process, they stir and cut the fluid in the chamber, making the flow of the fluid more orderly and uniform, avoiding the occurrence of unstable flow fields such as local turbulence and vortexes caused by factors such as excessive bubbles that are not broken in time or uneven stirring. A stable flow field is crucial to the stable operation of the equipment. It ensures that the flue gas and the eluent can be continuously and evenly mixed and reacted, ensuring that the dust removal and desulfurization work proceeds as expected, reducing the risk of equipment failure due to unstable flow field, further improving the reliability of equipment operation, ensuring the continuity of the flue gas desulfurization link in ironmaking production, and avoiding the impact of equipment failure on the entire ironmaking production process and adverse emissions on the environment.

[0077] Furthermore, it also includes a pressurizing component 9, which is arranged on one side of the dust removal tank 1 and leads to the flue gas duct 7. The dust removal atomizing nozzle 10 is arranged at the upper end of the dust removal chamber 101 and is located on the side of the dust removal outlet 104.

[0078] In this embodiment, a pressurizing assembly 9 is disposed on one side of the dust removal tank 1 and opens into the flue gas duct 7, capable of pressurizing the dust- and sulfur-laden flue gas entering the flue gas duct 7. The flue gas generated during the ironmaking process may initially have a relatively low pressure and an unstable flow rate. By increasing the pressure through the pressurizing assembly 9, the flue gas can enter the dust removal chamber 101 stably at a more appropriate flow rate and pressure. On the one hand, the appropriate pressure allows the flue gas to diffuse better within the dust removal chamber 101 after entering, preventing localized flue gas concentrations from being too high or too low, allowing for more uniform contact between the flue gas and the eluent, thereby improving the efficiency of the desulfurization reaction. On the other hand, the stable flow rate helps maintain the stability of the fluid flow within the dust removal chamber 101, ensuring orderly mixing and reaction between the eluent and the flue gas. This ensures that dust particles are more easily adsorbed and entrained by the eluent, allowing pollutants such as sulfur oxides to more fully react chemically with the desulfurization components in the eluent, further enhancing the overall dust removal and desulfurization effectiveness, ensuring that the discharged flue gas better meets environmental emission standards, and reducing pollution to the atmospheric environment.

[0079] The pressurizing component 9 pressurizes the flue gas so that the flue gas flow and pressure entering the dust removal chamber 101 remain relatively stable, which is crucial for maintaining the stable operation of the equipment. During the production process of the ironmaking plant, due to factors such as changes in the ironmaking process, the generation of flue gas may fluctuate. If there is no pressurizing component 9 to regulate, the unstable flue gas entering the dust removal chamber 101 may cause the flow field in the cavity to be disordered, affecting the normal mixing and reaction of the eluent and the flue gas, and further affecting the dust removal and desulfurization effect and the normal working state of each component of the equipment. The pressurizing component 9 can adjust the flue gas to the appropriate operating parameters before sending it into the dust removal chamber 101, ensuring that the equipment can operate stably under different production conditions, reducing the risk of equipment failure caused by unstable air intake, improving the reliability of equipment operation, and ensuring that the flue gas desulfurization link in ironmaking production can be carried out continuously and effectively, avoiding the impact of equipment failure on the entire production process and adverse emissions on the environment.

[0080] The dust removal atomizing nozzle 10 is arranged at the upper end of the dust removal chamber 101 and is located on the side of the dust removal outlet 104. It can atomize liquids such as water or special dust removal solutions and then spray them into the dust removal chamber 101. After the initial desulfurization treatment, the flue gas flows upward and is ready to be discharged from the dust removal outlet 104. The fine water mist sprayed by the atomizing nozzle can further capture those residual, fine dust particles. After these tiny water mist particles come into contact with the dust particles, through collision, condensation and other effects, the dust particles are enlarged and increased in weight, and are more likely to settle to the bottom of the dust removal chamber 101 under the action of gravity, or be adsorbed and entrained again by the subsequent eluent, thereby achieving more refined dust removal treatment of the flue gas, further reducing the dust content in the exhaust flue gas, improving the dust removal quality of the entire equipment, better meeting strict environmental protection requirements, and ensuring the cleanliness of the surrounding atmospheric environment.

[0081] Furthermore, the scraper 202 is arranged at an angle to the inner wall of the dust removal chamber 101 .

[0082] In this embodiment, the scraper 202 is arranged at an angle to the inner wall of the dust removal chamber 101, and the scraper 202 forms an acute angle with the inner wall of the dust removal chamber 101 in the direction of rotation of the rotating shaft 201. This unique angle design enables the scraper 202 to not only scrape the inner wall of the dust removal chamber 101 as it rotates with the rotating shaft 201, but also to produce a more intense stirring effect on the flue gas and eluent in the chamber while scraping the wall. When the scraper 202 scrapes the inner wall, due to the presence of the acute angle, it will exert an oblique thrust on the fluid near the wall, causing the flue gas and eluent to flow more violently in the direction perpendicular to the chamber wall and along the rotation direction of the rotating shaft 201, thereby further disrupting the laminar flow state that may have existed in the fluid, increasing the degree of mixing between the flue gas and eluent, and ensuring more complete and uniform contact between the two. In this way, the eluent can better absorb and entrain dust particles, and pollutants such as sulfur oxides can more fully react chemically with the desulfurization components in the eluent, significantly improving the efficiency of dust removal and desulfurization, so that the exhausted flue gas can better meet environmental emission standards and reduce pollution to the atmospheric environment.

[0083] The angled setting of scraper 202 also has a positive impact on the breakup and dispersion of bubbles within the cavity. During the mixing process of flue gas and eluent, a large number of bubbles are generated. As scraper 202 rotates, its acute angle with the cavity wall allows scraper 202 to not only squeeze and cut the bubbles as it normally does, but also disperse them more quickly due to the oblique thrust, thus preventing local accumulation of bubbles. At the same time, the probability of bubbles being broken into smaller sizes under the action of this oblique force is also increased, increasing the surface area of ​​the bubbles and allowing the flue gas within the bubbles to more fully contact and react with the eluent, maximizing the removal of sulfur from the flue gas, improving the thoroughness of desulfurization, and better meeting stringent environmental protection requirements. This helps protect the quality of the surrounding atmospheric environment and reduce the occurrence of environmental problems such as acid rain.

[0084] Furthermore, it includes a drainage piece 11, which is arranged on the acid liquid outlet 105. The acid liquid outlet 105 leads to a sedimentation tank 12 through the drainage piece 11. The sedimentation tank 12 is used to process the mud-containing acid liquid.

[0085] In this embodiment, the drainage component 11 is provided on the acid liquid outlet 105, which can regulate and control the discharge of the acid liquid. During the flue gas desulfurization process, muddy acid liquid will be generated in the dust removal chamber 101. If these acid liquids flow out directly, they may leak, splash, etc. due to factors such as unstable flow rate and uneven flow rate, which will not only corrode surrounding equipment and facilities, but also pollute the surrounding environment. The drainage component 11 can discharge the acid liquid in a stable and orderly manner. By reasonably controlling the flow rate and flow rate, it ensures that the acid liquid flows accurately to the sedimentation tank 12, avoiding problems such as accidental spillage of the acid liquid during the discharge process, ensuring the safety of the environment around the equipment, and also laying a good foundation for the subsequent centralized treatment of the acid liquid, meeting the requirements of environmental protection and safe production.

[0086] The sedimentation tank 12 is used to treat muddy acid liquid and plays a key role in environmental protection. The muddy acid liquid discharged from the acid liquid outlet 105 often contains substances such as dust, impurities and precipitates generated by the reaction. Direct discharge into the environment will cause serious pollution to the soil, water bodies, etc. The sedimentation tank 12 allows the muddy acid liquid to settle in it, and uses gravity to make solid substances such as mud and slag naturally settle to the bottom of the tank, thereby achieving solid-liquid separation. The supernatant after precipitation treatment has a relatively lower content of acidic substances and greatly reduced impurities. It can be further subjected to subsequent neutralization, purification and other treatment processes to meet the emission standards before being discharged, thereby effectively reducing the harm of acid discharge to the surrounding environment, protecting ecological and environmental elements such as soil and water bodies, and helping iron and steel plants achieve green production and meet increasingly stringent environmental protection requirements.

[0087] Furthermore, a cleaning hole 701 is provided in the middle of the flue gas duct 7, and a pressure valve 13 is also included. The pressure valve 13 is arranged at one end of the flue gas duct 7, and is used to control the connection or cancellation of the connection between the flue gas duct 7 and the pressurizing component 9. The drain valve 14 is arranged on the cleaning hole 701, and is used to open or cancel the opening of the cleaning hole 701.

[0088] In this embodiment, a cleaning hole 701 is provided in the middle of the flue gas duct 7 and is equipped with a drain valve 14. This design greatly facilitates the daily maintenance of the inlet pipe. During the ironmaking process, the flue gas often contains dust, impurities, and condensates that may be generated due to factors such as temperature changes. After long-term use, these substances tend to accumulate inside the inlet pipe, causing pipe blockage and affecting the normal transportation of the flue gas. When this happens, maintenance personnel can open the drain valve 14 to open the cleaning hole 701, and use corresponding tools such as a high-pressure water gun, a cleaning brush, etc. to clean the inside of the pipe from the cleaning hole 701 to remove accumulated debris and ensure the smooth flow of the flue gas duct 7. This design that allows for convenient internal cleaning effectively avoids the problem of poor flue gas transportation caused by pipe blockage, ensures that dust-containing and sulfur-containing flue gas can smoothly enter the desulfurization equipment for treatment, maintains the normal operation of the equipment, and reduces the risk of reduced dust removal and desulfurization effects and equipment failure caused by air intake problems.

[0089] The pressure valve 13 is a one-way valve arranged between the flue gas duct 7 and the pressurizing component 9. When the flue gas stops entering the dust removal tank 1, the pressure valve 13 is closed, preventing the eluent from flowing out along the flue gas duct 7 and avoiding waste of the eluent.

[0090] Furthermore, a liquid holding chamber 305 is formed between the lowermost partition 4 and the spray chamber 301. The liquid holding chamber 305 has a liquid outlet 304. The liquid outlet 304 is also provided with a pressure valve 13. It also includes a scraper 15. The scraper 15 is slidably set in the partition chamber 401. The scraper 15 abuts against the partition 4. There are several scrapers 15, which are respectively set in several partition chambers 401 for cleaning the top of the partition 4.

[0091] In this embodiment, a pressure valve 13 is provided at the liquid outlet 304 of the liquid-containing chamber 305, enabling precise control of the flow rate and pressure of the liquid flowing out of the spray chamber 301 and circulating back to the dust removal tank 1. During the operation of the flue gas desulfurization equipment, different operating conditions, such as flue gas flow rates and desulfurization reaction intensities, require different eluent circulation flow rates and pressures. By adjusting the opening of the pressure valve 13, the rate and pressure of liquid outflow can be controlled, ensuring that the eluent enters the dust removal tank 1 in an appropriate state, allowing it to better mix and react with the flue gas within the dust removal chamber 101. The pressure valve 13 also serves to stabilize liquid delivery. During equipment operation, various factors, such as pump pulsation and changes in resistance within the pipeline, may cause liquid pressure fluctuations. The pressure valve 13 automatically adjusts to buffer these pressure fluctuations, ensuring a smooth and continuous circulation of the eluent from the spray chamber 301 to the dust removal tank 1. This prevents unstable liquid pressure from affecting the continuity and effectiveness of the entire desulfurization process, thereby improving the reliability of equipment operation.

[0092] Scraper 15 slides within partition chamber 401 and abuts baffle 4. Several scrapers 15 are staggered in different partition chambers 401. This design allows for comprehensive and effective cleaning of the tops of baffles 4. Within spray chamber 301, baffles 4 play a crucial role in guiding the flow of flue gas into a serpentine channel and supporting the spray head 5. Over time and as the desulfurization process continues, dust, sediment from the desulfurization reaction, and impurities from the spray liquid may accumulate on the tops of baffles 4. These deposits can affect the flow guidance of baffles 4, altering the flow of flue gas within the serpentine channel, leading to uneven contact between the flue gas and the spray liquid, and thus reducing desulfurization efficiency. The scraper 15 can scrape off these attachments in time by sliding on the partition 4, keeping the surface of the partition 4 clean and smooth, maintaining the original good flow-conducting performance of the partition 4, ensuring that the flue gas can flow smoothly along the designed serpentine channel, making the flue gas fully and evenly contact with the spray liquid, continuously improving the desulfurization effect, ensuring that the equipment functions stably, and the discharged flue gas meets environmental protection requirements.

[0093] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A flue gas desulfurization equipment for ironmaking, characterized in that: include: A dust removal tank (1), the dust removal tank (1) having a dust removal chamber (101), a flue gas inlet (102) at the bottom of the dust removal chamber (101), an eluent inlet (103) at the side, and a dust removal outlet (104) at the top of the dust removal chamber (101); A stirring member (2), the stirring member (2) being rotatably disposed in the dust removal chamber (101); A spray tank (3), the spray tank (3) being arranged on one side of the dust removal tank (1), the spray tank (3) having a spray chamber (301), the spray chamber (301) having a dust removal inlet (302), a gas outlet (303) and a liquid outlet (304), the liquid outlet (304) leading to the eluent inlet (103); A partition (4), the partition (4) being arranged in the spray chamber (301), the partition (4) being a plurality of partitions (4) arranged in sequence in the spray chamber (301), a partition chamber (401) being formed between two adjacent partitions (4), and the plurality of partition chambers (401) forming a serpentine channel; A spray head (5), the spray head (5) being arranged on the partition (4) and located on the lower side of the partition (4); The stirring member (2) comprises: A rotating shaft (201), the rotating shaft (201) being rotatably disposed within the dust removal chamber (101); a scraper (202), the scraper (202) being arranged on the rotating shaft (201), the scraper (202) having a scraping portion (203), the scraping portion (203) being arranged in contact with an inner wall of the dust removal chamber (101), and forming a cavity (204) between the scraper (202) and the rotating shaft (201); a crushing member (205), the crushing member (205) being arranged in the cavity (204) and on the scraper (202), the crushing member (205) being arranged in a plurality and used for crushing bubbles formed by the gas entering the flue gas inlet (102); a flue gas duct (7), the flue gas duct (7) leading to the flue gas inlet (102); The scraper (202) has an arc-shaped paving portion (206), and the arc-shaped paving portion (206) forms a paving space (207). The flue gas duct (7) is a U-shaped tube and further includes: A buffer (8) is a hemispherical shell, which is inverted and arranged on one side of the flue gas inlet (102). The buffer (8) has a clearance groove (801) around it, and the clearance groove (801) is used for gas diffusion from the flue gas inlet (102) to the clearance space (207).

2. The flue gas desulfurization equipment for ironmaking according to claim 1, characterized in that: The liquid outlet (304) is higher than the eluent inlet (103), the dust removal chamber (101) further has an acid outlet (105), the eluent inlet (103) is located below the liquid level of the dust removal chamber (101), the liquid outlet (304) is located above the liquid level of the dust removal chamber (101), the acid outlet (105) is located on one side of the flue gas inlet (102), and further comprises: A connecting pipe (6) is provided obliquely on the dust removal tank (1) and is used to connect the liquid outlet (304) with the eluent inlet (103).

3. The flue gas desulfurization equipment for ironmaking according to claim 1, characterized in that: There are a plurality of scrapers (202) arranged in a circle on the rotating shaft (201); the scrapers (202) are spiral scrapers (202); and the crushing piece (205) has the same shape as the scraper (202).

4. The flue gas desulfurization equipment for ironmaking according to claim 2, characterized in that: Also includes: A pressurizing component (9), the pressurizing component (9) being arranged on one side of the dust removal tank (1), and the pressurizing component (9) leading to the flue gas duct (7); A dust removal atomizing nozzle (10) is provided at the upper end of the dust removal chamber (101) and is located on one side of the dust removal outlet (104).

5. The flue gas desulfurization equipment for ironmaking according to claim 1, characterized in that: The scraper (202) is arranged at an angle to the inner wall of the dust removal chamber (101).

6. The flue gas desulfurization equipment for ironmaking according to claim 2, characterized in that: Also includes: a liquid discharge member (11), the liquid discharge member (11) being arranged on the acid liquid outlet (105); A sedimentation tank (12), wherein the acid liquid outlet (105) leads to the sedimentation tank (12) through the liquid discharge member (11), and the sedimentation tank (12) is used to treat the mud-containing acid liquid.

7. The flue gas desulfurization equipment for ironmaking according to claim 4, characterized in that: The flue gas duct (7) has a cleaning hole (701) in the middle, and further comprises: a pressure valve (13), the pressure valve (13) being arranged at one end of the flue gas duct (7) and being used to control the connection between the flue gas duct (7) and the pressurizing component (9) or to cancel the connection; A drain valve (14) is provided on the cleaning hole (701) and is used to open or cancel the opening of the cleaning hole (701).

8. The flue gas desulfurization equipment for ironmaking according to claim 7, characterized in that: A liquid containing cavity (305) is formed between the lowermost partition (4) and the spray cavity (301), the liquid containing cavity (305) having the liquid outlet (304), the liquid outlet (304) also being provided with a pressure valve (13), and further comprising: A scraper (15) is slidably arranged in the partition cavity (401), the scraper (15) abuts against the partition (4), and there are a plurality of scrapers (15) respectively arranged in a plurality of the partition cavities (401) for cleaning the top of the partition (4).

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