Flue gas desulfurization equipment for ironmaking

Abstract

The invention relates to the technical field of flue gas desulfurization, and provides ironmaking flue gas desulfurization equipment which comprises a dust removal tank, 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 an eluent inlet, and the top of the dust removal cavity is provided with a dust removal outlet. The spraying tank is provided with a spraying cavity, the spraying cavity is provided with a dust removal inlet, a gas outlet and a liquid outlet, the liquid outlet leads to the eluent inlet, the partition plates are arranged in the spraying cavity and are sequentially arranged in the spraying cavity, a partition cavity is formed between every two adjacent partition plates, the partition cavities form a serpentine channel, and the spraying heads are arranged on the partition plates. And the baffle is arranged below the baffle. By means of the technical scheme, the problem that in the prior art, flue gas desulfurization equipment for ironmaking is poor in desulfurization effect is solved.

Description

Technical Field

[0001] The 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 contact and react with flue gas. Although 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 in the flue gas. In large-scale iron and steel production, a large amount of sulfur-containing flue gas is directly discharged without effective treatment, causing serious pollution to the atmospheric environment, causing 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 wastes, which are difficult to handle and require special landfill or treatment sites, increasing the environmental protection costs and operating burdens of enterprises.

[0004] The subsequent wet desulfurization technology has improved the desulfurization efficiency to a certain extent, but it also faces many challenges. The utilization rate of desulfurization liquid in traditional wet desulfurization equipment is low, and a large amount of desulfurization liquid is discharged after a single use, which not only wastes precious resources, but also increases the cost of enterprises in desulfurization liquid procurement and waste liquid treatment. Summary of the invention

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

[0006] The technical solution of the present invention is as follows: A flue gas desulfurization device for ironmaking, comprising: A dust removal tank, wherein the dust removal tank has a dust removal chamber, the bottom of the dust removal chamber has a smoke inlet, the side has an eluent inlet, and the top of the dust removal chamber has a dust removal outlet; A stirring member, the stirring member is rotatably disposed in the dust removal chamber; A spray tank, the spray tank is arranged on one side of the dust removal tank, the spray tank has a spray chamber, the spray chamber has a dust removal inlet, a gas outlet and a liquid outlet, and the liquid outlet leads to the eluent inlet; A partition, wherein the partition is arranged in the spray chamber, and there are a plurality of partitions, which are arranged in sequence in the spray chamber, and a partition chamber is formed between two adjacent partitions, and a plurality of the partition chambers form a serpentine channel; A shower head is arranged on the partition and located at the lower side of the partition.

[0007] 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 one side of the flue gas inlet, further comprising: A connecting pipe, the connecting pipe is obliquely arranged on the dust removal tank and is used to connect the liquid outlet with the eluent inlet; A flue gas duct leads to the flue gas inlet.

[0008] As a further technical solution, the stirring member comprises: A rotating shaft, the rotating shaft being rotatably disposed in the dust removal chamber; A scraper, the scraper is arranged on the rotating shaft, the scraper has a scraping portion, the scraping portion is arranged in contact with the inner wall of the dust removal chamber, and a cavity is formed between the scraper and the rotating shaft; A breaking piece is arranged in the cavity and on the scraper. A plurality of the breaking pieces are arranged in an array and are used to break bubbles formed by the gas entering the flue gas inlet.

[0009] As a further technical solution, the scraper has an arc-shaped yielding portion, the arc-shaped yielding portion forms a yielding space, and the smoke duct is a U-shaped tube, and further includes: 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 the diffusion of gas from the smoke inlet to the clearance space.

[0010] As a further technical solution, there are a plurality of scrapers which are arranged in a circle on the rotating shaft. The scrapers are spiral scrapers, and the crushing member has the same shape as the scrapers.

[0011] As a further technical solution, it also includes: A pressurizing component, the pressurizing component is arranged on one side of the dust removal tank, and the pressurizing component leads to the flue gas duct; A dust removal atomizing nozzle is arranged at the upper end of the dust removal chamber and located at one side of the dust removal outlet.

[0012] As a further technical solution, the scraper is arranged at an angle to the inner wall of the dust removal chamber.

[0013] As a further technical solution, it also includes: A liquid discharge member, the liquid discharge member being arranged on the acid liquid outlet; The acid liquid outlet leads to the sedimentation tank through the drainage piece, and the sedimentation tank is used to process the muddy acid liquid.

[0014] As a further technical solution, the flue gas duct has a cleaning hole in the middle, and further comprises: A pressure valve, which is arranged at one end of the flue gas duct and is used to control the connection between the flue gas duct and the pressurizing component or to cancel the connection; A drain valve is provided on the cleaning hole and is used to open or cancel the opening of the cleaning hole.

[0015] As a further technical solution, a liquid containing cavity is formed between the lowermost partition and the spray cavity, the liquid containing cavity has the liquid outlet, and the liquid outlet is also provided with a pressure valve, and further includes: 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.

[0016] The working principle and beneficial effects of the present invention are: In the present invention, a flue gas inlet is arranged at the bottom of the dust removal chamber of the dust removal tank, and an eluent inlet is arranged at the side. This layout enables 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 mixing effect of the flue gas and the eluent can be further enhanced by rotating the stirring piece arranged in the dust removal chamber. The stirring piece continuously stirs to break the large bubbles of the flue gas to form a number of small bubbles, so that the two react more fully over a larger contact area, making it easier for dust particles 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.

[0017] Several partitions are set in the spray tank to form a serpentine channel, so that the flue gas from the dust removal tank needs to flow along a tortuous path in the spray chamber. This design prolongs the residence time of the flue gas in the spray chamber, increases the contact time between the flue gas and the liquid in the spray chamber, and allows harmful substances such as sulfur oxides in the flue gas to have more time to fully react with the spray liquid, further improving the desulfurization efficiency. At the same time, the spray head installed on the lower side of the partition can spray the spray liquid evenly in the serpentine channel, ensuring that the flue gas can fully contact the fresh spray liquid at every point it flows through, realizing all-round and multi-level spray washing, 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 environmental air quality, and reducing the root causes of environmental problems such as acid rain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred implementation modes 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.

[0019] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 2 for Figure 1 A is a schematic diagram of the enlarged structure of the middle part; Figure 3 for Figure 1 A schematic diagram of the enlarged structure of B; Figure 4 It is a schematic diagram of the structure of the rotating part in the present invention; Figure 5 It is a schematic cross-sectional structural diagram of the rotating member in the present invention; Figure 6 It is a schematic diagram of the structure of the present invention; 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, scraper 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

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0021] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0022] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] 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.

[0024] Reference Figure 1 to Figure 6 , which is the first embodiment of the present invention, a flue gas desulfurization device for ironmaking is proposed, 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 a plurality of partitions 4, which are arranged in sequence in the spray chamber 301, a partition chamber 401 is formed between two adjacent partitions 4, and a plurality of partition chambers 401 form a serpentine channel, and a spray head 5 is arranged on the partition 4 and is located at the lower side of the partition 4.

[0025] 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 stirring member 2 that is rotated in the dust removal chamber 101 can further enhance the mixing effect of the flue gas and the eluent. The stirring member 2 continuously stirs to break the large bubbles of the flue gas to form a number of small bubbles, so that the two react with a larger contact area and a more sufficient degree, 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.

[0026] Several partitions 4 are arranged 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, increases the contact time between the flue gas and the liquid in the spray chamber 301, and allows harmful substances such as sulfur oxides in the flue gas to have more sufficient time 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 spray the spray liquid evenly in the serpentine channel, ensuring that the flue gas can fully contact the fresh spray liquid at every point it flows through, realizing all-round and multi-level spray washing, 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 environmental air quality, and reducing the root causes of environmental problems such as acid rain.

[0027] The liquid outlet 304 of the spray tank 3 leads to the eluent inlet 103 of the dust removal tank 1. This design realizes 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 play a role and suspended matter adsorbed with dust, etc. It is sent to the dust removal tank 1 for reuse as an eluent, which not only reduces the use of fresh eluent and reduces the company's procurement cost of desulfurization reagents, but also makes full use of the effective ingredients in the liquid, avoids the waste of resources, and improves the economy of the entire desulfurization equipment operation. Especially for large-scale, long-term iron-making enterprises, it can save considerable operating costs in the long term.

[0028] Due to the recycling of the eluent, the frequency of liquid renewal in the equipment is reduced to a certain extent, and the corrosion and wear caused by frequent liquid replacement on the equipment are correspondingly reduced, extending the service life of the dust removal tank 1, the spray tank 3 and the internal components such as the stirring element 2, the partition 4, and the spray head 5. In addition, while the structural design of the equipment achieves efficient desulfurization, the layout of each component is relatively reasonable, and it is not easy to cause component damage due to excessive local pressure, excessive flow rate, etc., reducing the frequency of maintenance and replacement of components, further saving equipment maintenance costs, and improving the overall cost performance of the equipment, so that enterprises can better control operating costs and enhance market competitiveness while meeting environmental protection requirements for flue gas desulfurization.

[0029] 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 the eluent continuously enter the dust removal chamber 101, flow field disorder and local turbulence are likely to occur. The stirring element 2 continuously rotates to make the fluid mixing in the chamber more uniform and orderly, avoiding the problems of 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, 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.

[0030] 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 duct 7 leads to the flue gas inlet 102.

[0031] In this embodiment, the liquid outlet 304 is higher than the eluent inlet 103, and is connected through the connecting pipe 6 arranged at an angle, which cleverly utilizes the gravity generated by the liquid level difference to realize the natural flow of the eluent. The liquid that participates in the desulfurization reaction in the spray tank 3 can rely on its own gravity to flow smoothly from the liquid outlet 304 at a higher position to the eluent inlet 103 at a lower position along the connecting pipe 6, 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 ironmaking, which requires long-term and large-scale treatment of flue gas. Long-term accumulation can save considerable energy expenses. At the same time, the natural circulation system is relatively more stable and reliable, effectively avoiding the problem of interruption of the eluent circulation due to emergencies such as power equipment failure and power outage, ensuring the continuity of the entire desulfurization process, so that the flue gas can be continuously and stably effectively dusted and desulfurized, and maintain a good environmental protection effect.

[0032] 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, and achieve 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 the dust particles in the flue gas easier 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.

[0033] The acid liquid outlet 105 is located on the side of the flue gas inlet 102, and has good synergy from the perspective of the overall process flow. In the actual operation process, 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. Such a layout is more reasonable and convenient in terms of space and operation process, which is convenient for operators to simultaneously manage and monitor the introduction of flue gas and the discharge of acid liquid, reducing problems such as pipeline crossing and inconvenient operation caused by unreasonable layout, improving the efficiency of the operation and maintenance of the entire desulfurization equipment, making the connection between each link smoother, and ensuring that the flue gas desulfurization equipment for ironmaking can play a role stably and efficiently, and realizing continuous and effective treatment of flue gas and proper disposal of acid liquid.

[0034] The connecting pipe 6, which is arranged obliquely, is a key component for connecting the spray tank 3 and the dust removal tank 1. It 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 shares part of the stress generated by factors such as liquid flow and temperature change during the operation of the equipment through a reasonable inclination angle and a stable connection method, ensuring the firmness of the connection between the spray tank 3 and the dust removal tank 1, avoiding problems such as loosening and deformation of components due to uneven local force, and improving the durability of the equipment; on the other hand, the connecting pipe 6 and other structures such as the flue gas pipeline 7 and the acid outlet 105 together constitute a complete and orderly system, optimizing 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 dust removal and desulfurization functions, thereby improving the overall performance and reliability of the equipment.

[0035] 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 breaking member 205 is arranged in the cavity 204 and on the scraper 202. A plurality of breaking members 205 are arranged in an array to break bubbles formed by the gas entering the flue gas inlet 102.

[0036] In this embodiment, the scraping portion 203 of the scraper 202 is in contact with the inner wall of the dust removal chamber 101. As the rotating shaft 201 drives the scraper 202 to rotate, the dust, impurities and sediments produced by chemical reactions attached to the inner wall of the dust removal chamber 101 can be effectively scraped off. During the flue gas desulfurization process, the eluent reacts with the flue gas continuously, and some dust particles, solid substances generated by the reaction, etc. are easily attached to the inner wall. If they accumulate for a long time, the effective reaction space in the chamber will be reduced, and the flue gas will be prevented from fully contacting the eluent. The continuous scraping action of the scraper 202 can keep the inner wall clean at all times, increase the contact area between the flue gas and the eluent, ensure that the two are fully mixed and reacted, so that the dust is easier to be removed by the eluent, and the sulfur oxides can also better react with the desulfurization components in the eluent, significantly improving the dust removal and desulfurization efficiency, making the discharged flue gas more in line with environmental emission standards, and reducing pollution to the atmospheric environment. The scraper 202 continuously cleans the cavity fluid so that it can flow in a relatively stable and uniform flow field, ensuring the consistency of mixing and reaction between the flue gas and the eluent, and improving the reliability of the equipment operation. Regardless of how the flue gas flow rate, eluent flow rate and other working conditions change during the production process of the ironmaking plant, the equipment can operate stably and effectively, reducing the risk of equipment failure caused by unstable flow field and extending the service life of the equipment.

[0037] 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 with 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, remove the sulfur component in the flue gas to the greatest extent, improve the depth and accuracy of desulfurization, better meet strict environmental protection requirements, effectively protect the surrounding atmospheric environment quality, and reduce the possibility of environmental problems such as acid rain.

[0038] The crushing effect of the crushing element 205 on the bubbles reduces the impact on the equipment to a certain extent. In the case of no crushing of bubbles, a large impact force will be generated when the large bubbles burst, which will act on the inner wall of the equipment, the stirring element 2 and other components for a long time, easily causing wear and corrosion on the surface of the components, affecting the durability of the equipment. After the crushing element 205 breaks the bubbles into small sizes, the impact force generated by the bursting of the bubbles is dispersed and relatively reduced, reducing the damage to the equipment, allowing the dust removal tank 1 and the internal stirring element 2 and other components to operate in a relatively mild working environment, extending the service life of each component, reducing the frequency of repair and replacement of components due to equipment damage, saving equipment maintenance costs, and improving the economy and reliability of the entire desulfurization equipment.

[0039] The structural design of the stirring member 2 consisting of a rotating shaft 201, a scraper 202 and a crushing member 205 is highly reasonable and coordinated. The rotating shaft 201, as the core support and power transmission component, drives the scraper 202 to rotate to realize the wall scraping function, and at the same time creates a suitable movement environment for the crushing member 205; the scraper 202 completes the cleaning task by abutting against the cavity wall, and cooperates with the rotating shaft 201 to form a cavity 204 for accommodating the crushing member 205; the crushing member 205 plays the role of crushing bubbles in the cavity 204, and the various components cooperate and work together to jointly construct 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 due to improper component layout, ensuring that the stirring member 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.

[0040] 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 on one side of the flue gas inlet 102. The buffer 8 has give-way grooves 801 around it, and the give-way grooves 801 are used for the diffusion of gas from the flue gas inlet 102 to the give-way space 207.

[0041] In this embodiment, the flue gas duct 7 adopts a U-shaped tube design, which can itself play a buffering and stabilizing effect on the incoming dust-containing and sulfur-containing flue gas to a certain extent. When the flue gas flows in the U-shaped tube, the change of its flow direction and the detour in the tube make the flow velocity and impact force of the flue gas be initially adjusted, avoiding the flue gas from directly rushing into the dust removal chamber 101 in an overly rapid and violent state, and reducing the impact on the various components in the dust removal chamber 101. The buffer 8 is arranged in the dust removal chamber 101 and in the clearance space 207 of the scraper 202, which further enhances the buffering effect. The inverted shape of the hemispherical shell and the clearance grooves 801 arranged around it enable the gas entering from the flue gas inlet 102 to first enter the buffer 8 in the clearance space 207, and then diffuse more smoothly into the dust removal chamber 101 through the clearance grooves 801. This double buffer 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 would affect the dust removal and desulfurization effects.

[0042] Without these buffer designs, dusty and sulfur-containing flue gas directly rushes into the dust removal chamber 101 at high speed, which will produce a large impact force on the stirring member 2, inner wall and other components in the chamber. Under long-term action, it is easy to 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 the buffer 8 effectively reduces the impact force of the flue gas, making the external force on each component of the equipment more gentle, and reducing the risk of damage caused by impact. For example, for stirring members 2 such as the rotating shaft 201 and the scraper 202, loosening, deformation and other problems caused by frequent strong flue gas impact are avoided, and their normal use time is extended; 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, and extending the service life of the entire flue gas desulfurization equipment for ironmaking as a whole, reducing the cost expenditure of the enterprise due to equipment maintenance and replacement of parts.

[0043] 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, effectively buffering and guiding the incoming flue gas. This layout makes full use of the space inside the equipment, combines the buffer 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 is initially adjusted by the U-shaped tube, and then 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, fully contact with the eluent, improve the efficiency and effect of the entire equipment on the flue gas treatment, optimize the distribution of the flue gas in the dust removal chamber 101, and ensure that the flue gas in each area can be fully desulfurized.

[0044] 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 the contact with the eluent is more sufficient and uniform. During the desulfurization process, the eluent needs to fully contact with pollutants such as sulfur oxides in the flue gas to produce an effective chemical reaction to 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, maximize the adsorption of dust particles and reaction with sulfur oxides, improve the efficiency of dust removal and desulfurization, and allow 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.

[0045] 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 allowing the flue gas to enter evenly and smoothly, the splashing of the eluent and the local liquid layer disorder caused by the impact of the intake air are avoided, the relative stability of the eluent level in the chamber is maintained, and the stirring element 2 and other components can 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 from the iron and steel plant continues to meet the standards, and contribute to the protection of the surrounding air quality.

[0046] Furthermore, there are a plurality of scrapers 202 which are arranged in a circle on the rotating shaft 201 . The scrapers 202 are spiral scrapers 202 , and the crushing member 205 has the same shape as the scraper 202 .

[0047] In this embodiment, the scrapers 202 are provided in a number and are arranged in a circle on the rotating shaft 201. This layout makes the stirring range wider and more uniform, and can fully cover the cross-sectional area of ​​the dust removal chamber 101. Driven by the rotating shaft 201, each scraper 202 works together to fully stir the flue gas and the eluent in the dust removal chamber 101. The design of the scraper 202 as a spiral scraper 202 further enhances the stirring effect. The spiral shape can not only realize the up and down flipping of the flue gas and the eluent during the rotation process, but also produce a conveying effect along the axial direction, so that the flue gas and the eluent form a complex flow path in the dust removal chamber 101, increase the contact area and contact time between the two, and promote the eluent to better absorb the dust particles, and also allow 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, so that the discharged flue gas can better meet the environmental emission standards and reduce the pollution to the atmospheric environment.

[0048] The crushing element 205 has the same shape as the scraper 202, also in a spiral shape. This design enables them to work better together 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 generate 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 passing bubbles, breaking the bubbles into smaller sizes, increasing the surface area of ​​the bubbles, so that the flue gas in the bubbles can more fully contact and react with the eluent, maximally removing the sulfur component in the flue gas, improving the thoroughness of desulfurization, better meeting strict environmental protection requirements, and helping to protect the surrounding atmospheric environment quality and reduce the occurrence of environmental problems such as acid rain.

[0049] 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 in a circle, avoiding the deformation and damage of the scrapers 202 or the eccentricity of the rotating shaft 201 due to excessive local force, which affects 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 ironmaking plant, the equipment can rely on stable stirring to operate, ensure the consistency of the dust removal and desulfurization effect, improve the reliability of equipment operation, reduce the risk of equipment failure caused by unstable stirring, and extend the service life of the equipment.

[0050] The crushing element 205 has the same shape as the spiral scraper 202 and works in coordination, 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 caused by unstable flow fields, further improving the reliability of equipment operation, ensuring the continuity of the flue gas desulfurization link in ironmaking production, and avoiding equipment failures that affect the entire ironmaking production process and cause adverse emissions to the environment.

[0051] 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 one side of the dust removal outlet 104.

[0052] In this embodiment, the pressurizing component 9 is arranged on one side of the dust removal tank 1 and leads to the flue gas duct 7, and can pressurize the dust-containing and sulfur-containing flue gas entering the flue gas duct 7. The flue gas generated in the ironmaking process may have a relatively low initial pressure and a relatively unstable flow rate. After the pressure is increased by the pressurizing component 9, the flue gas can stably enter the dust removal chamber 101 at a more appropriate flow rate and pressure. On the one hand, the appropriate pressure can make the flue gas diffuse better in the chamber after entering the dust removal chamber 101, avoid the situation where the local flue gas concentration is too high or too low, and make the flue gas and the eluent contact more evenly, thereby improving the efficiency of the desulfurization reaction; on the other hand, the stable flow rate helps to maintain the stability of the fluid flow in the dust removal chamber 101, ensure that the mixing and reaction between the eluent and the flue gas can proceed in an orderly manner, ensure that the dust particles are more easily adsorbed and entrained by the eluent, and the pollutants such as sulfur oxides react more fully with the desulfurization components in the eluent, further improve the overall dust removal and desulfurization effect, so that the discharged flue gas can better meet the environmental emission standards and reduce the pollution to the atmospheric environment.

[0053] 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 to 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 chamber 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 the 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.

[0054] The dust removal atomizing nozzle 10 is arranged at the upper end of the dust removal chamber 101 and on one side of the dust removal outlet 104. It can atomize liquids such as water or special dust removal solutions and spray them into the dust removal chamber 101. After the initial desulfurization treatment, the fine water mist sprayed by the atomizing nozzle can further capture the remaining, fine dust particles in the process of flue gas flowing upward and preparing to be discharged from the dust removal outlet 104. After these tiny water mist particles come into contact with dust particles, they are enlarged and weighed through collision, condensation and other effects, making it easier for the dust particles to settle to the bottom of the dust removal chamber 101 under the action of gravity, or to be adsorbed and entrained by the subsequent eluent again, so as to achieve a more refined dust removal treatment of the flue gas, further reduce the dust content in the exhaust flue gas, improve the dust removal quality of the entire equipment, better meet the strict environmental protection requirements, and ensure the cleanliness of the surrounding atmospheric environment.

[0055] Furthermore, the scraper 202 is arranged at an angle with the inner wall of the dust removal chamber 101 .

[0056] In this embodiment, the scraper 202 is set at an angle with the inner wall of the dust removal chamber 101, and the scraper 202 is at 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 when rotating with the rotating shaft 201, but also produce a stronger 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 existence of the acute angle, it will exert an oblique thrust on the fluid close to 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 breaking the laminar state that may have existed in the fluid, increasing the degree of mixing between the flue gas and the eluent, and making the contact between the two more sufficient and uniform. In this way, the eluent can better absorb the entrained 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.

[0057] This angle setting of the scraper 202 also has a positive effect on the breaking and dispersion of bubbles in the cavity. A large number of bubbles will be generated during the mixing process of flue gas and eluent. When the scraper 202 rotates, the acute angle between it and the cavity wall enables the scraper 202 to squeeze and cut the bubbles as usual when passing through the bubbles. In addition, it can also disperse the bubbles more quickly to the surroundings based on the oblique thrust to avoid 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 higher, which increases the surface area of ​​the bubbles, allowing the flue gas in the bubbles to contact and react with the eluent more fully, thereby removing the sulfur component in the flue gas to the maximum extent, improving the thoroughness of desulfurization, better meeting strict environmental protection requirements, and helping to protect the surrounding atmospheric environment quality and reduce the occurrence of environmental problems such as acid rain.

[0058] Furthermore, it also 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 treat the mud-containing acid liquid.

[0059] In this embodiment, the liquid discharge part 11 is arranged 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 produced 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 liquid discharge part 11 can discharge the acid liquid in a stable and orderly manner. By reasonably controlling the flow rate and flow rate, it can ensure that the acid liquid accurately flows 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, which meets the requirements of environmental protection and safe production.

[0060] 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 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 to achieve solid-liquid separation. The supernatant after sedimentation 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.

[0061] Furthermore, a cleaning hole 701 is provided in the middle of the flue gas duct 7, and also includes a pressure valve 13. The pressure valve 13 is arranged at one end of the flue gas duct 7 for controlling 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 for opening or canceling the opening of the cleaning hole 701.

[0062] In this embodiment, a cleaning hole 701 is provided in the middle of the flue gas duct 7, and a drain valve 14 is provided. This design provides great convenience for the daily maintenance of the inlet pipe. In 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 are easy to accumulate inside the inlet pipe, causing pipe blockage and affecting the normal transportation of the flue gas. When this happens, the maintenance personnel can open the drain valve 14 to open the cleaning hole 701, and use corresponding tools such as high-pressure water guns, cleaning brushes, etc. to clean the inside of the pipe from the cleaning hole 701 to remove the 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.

[0063] 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 the waste of the eluent.

[0064] Furthermore, a liquid containing chamber 305 is formed between the lowermost partition 4 and the spray chamber 301. The liquid containing chamber 305 has a liquid outlet 304. The liquid outlet 304 is also provided with a pressure valve 13, and also includes a scraper 15. The scraper 15 is slidably arranged in the partition chamber 401. The scraper 15 abuts against the partition 4. There are several scrapers 15, which are respectively arranged in several partition chambers 401 for cleaning the top of the partition 4.

[0065] In this embodiment, a pressure valve 13 is provided at the liquid outlet 304 of the liquid containing chamber 305, which can accurately control the liquid flow rate and pressure flowing out of the spray chamber 301 and ready to circulate back to the dust removal tank 1. During the operation of the flue gas desulfurization equipment, different working conditions such as different flue gas flow rates and desulfurization reaction intensities have different requirements for the circulation flow rate and pressure of the eluent. By adjusting the opening of the pressure valve 13, the speed and pressure of the liquid outflow can be controlled to ensure that the eluent enters the dust removal tank 1 in a suitable state, so that it can be better mixed and reacted with the flue gas in the dust removal chamber 101. The pressure valve 13 can also play a role in stabilizing the liquid delivery. During the operation of the equipment, the liquid pressure may fluctuate due to various factors such as the pulsation of the pump and the change of resistance in the pipeline. The pressure valve 13 can automatically adjust to buffer these pressure changes, ensure that the circulation process of the eluent from the spray chamber 301 to the dust removal tank 1 is smooth and continuous, avoid the influence of the consistency and effect of the entire desulfurization process due to the instability of the liquid pressure, and improve the reliability of the equipment operation.

[0066] The scraper 15 is slidably arranged in the partition chamber 401 and abuts against the partition 4, and several scrapers 15 are staggered in different partition chambers 401 in sequence. This design can comprehensively and effectively clean the top of the partition 4. In the spray chamber 301, the partition 4 plays an important role in guiding the flow of flue gas to form a serpentine channel and carrying the spray head 5. As time goes by and the desulfurization process continues, dust, sediments produced by the desulfurization reaction, and impurities in the spray liquid and other substances may accumulate on the top of the partition 4. These attachments will affect the diversion effect of the partition 4, change the flow state of the flue gas in the serpentine channel, and cause uneven contact between the flue gas and the spray liquid, thereby reducing the 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.

[0067] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. 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) comprising a dust removal chamber (101), the bottom of the dust removal chamber (101) comprising a smoke inlet (102), the side of the dust removal chamber (101) comprising an eluent inlet (103), and the top of the dust removal chamber (101) comprising a dust removal outlet (104); 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) comprising a spray chamber (301), the spray chamber (301) comprising 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 shower head (5), the shower head (5) being arranged on the partition (4) and located at the lower side of the partition (4).

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 liquid 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 liquid outlet (105) is located on one side of the flue gas inlet (102), and further comprises: A connecting pipe (6), the connecting pipe (6) being arranged obliquely on the dust removal tank (1) and being used for connecting the liquid outlet (304) with the eluent inlet (103); A flue gas duct (7), the flue gas duct (7) leading to the flue gas inlet (102).

3. The flue gas desulfurization equipment for ironmaking according to claim 2, characterized in that: The stirring element (2) comprises: A rotating shaft (201), the rotating shaft (201) being rotatably disposed in 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 a cavity (204) being formed 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), and the crushing members (205) being arranged in a plurality and used for crushing bubbles formed by the gas entering through the flue gas inlet (102).

4. The flue gas desulfurization equipment for ironmaking according to claim 3, characterized in that: The scraper (202) has an arc-shaped clearance portion (206), the arc-shaped clearance portion (206) forms a clearance space (207), and the smoke duct (7) is a U-shaped tube, and further comprises: A buffer (8), the buffer (8) being a hemispherical shell, being invertedly arranged on one side of the smoke inlet (102), the buffer (8) having clearance grooves (801) around it, the clearance grooves (801) being used for diffusion of gas from the smoke inlet (102) to the clearance space (207).

5. The flue gas desulfurization equipment for ironmaking according to claim 3, 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 element (205) has the same shape as the scraper (202).

6. 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), the pressurizing component (9) leading to the flue gas duct (7); A dust removal atomizing nozzle (10), wherein the dust removal atomizing nozzle (10) is arranged at the upper end of the dust removal chamber (101) and is located on one side of the dust removal outlet (104).

7. The flue gas desulfurization equipment for ironmaking according to claim 3, characterized in that: The scraper (202) is arranged at an angle to the inner wall of the dust removal chamber (101).

8. The flue gas desulfurization equipment for ironmaking according to claim 3, 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.

9. The flue gas desulfurization equipment for ironmaking according to claim 6, 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 liquid discharge valve (14), the liquid discharge valve (14) being arranged on the cleaning hole (701) and being used to open or cancel opening of the cleaning hole (701).

10. The flue gas desulfurization equipment for ironmaking according to claim 9, characterized in that: A liquid containing chamber (305) is formed between the lowermost partition plate (4) and the spray chamber (301), the liquid containing chamber (305) having the liquid outlet (304), the liquid outlet (304) also being provided with a pressure valve (13), and further comprising: A scraper (15), the scraper (15) being slidably disposed in the partition cavity (401), the scraper (15) being in contact with the partition plate (4), and the scraper (15) being a plurality of pieces, respectively disposed in a plurality of the partition cavities (401) and used for cleaning the top of the partition plate (4).

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