Iron oxyhydroxide desulfurization tower and desulfurization system
By introducing flow guide plates and gas distributors into the ferric hydroxide desulfurization tower, the performance degradation caused by contact between moisture and hydrocarbons and the catalyst was solved, resulting in a more efficient desulfurization effect and higher packing utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2026-03-31
AI Technical Summary
In traditional hydroxyl iron oxide desulfurization towers, moisture and hydrocarbons in the gas come into contact with the catalyst packing layer, leading to a decrease in catalyst performance and affecting the desulfurization effect.
A hydroxyl iron oxide desulfurization tower was designed, comprising a flow guide plate, a gas distributor, and a desulfurization packing layer. The flow guide plate and gas distributor remove moisture from the gas, reducing the probability of moisture contacting the desulfurization packing layer, improving the uniformity of gas distribution, and enhancing the contact effect with the desulfurization packing layer.
It effectively removes moisture from the gas, reduces the reaction between hydrocarbons and the packing layer, improves the desulfurization effect and packing life, and ensures that the exhaust gas meets the standards.
Smart Images
Figure CN224057096U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of desulfurization technology, and more specifically, to a hydroxyl iron oxide desulfurization tower and desulfurization system. Background Technology
[0002] Iron hydroxyl oxide (IHO) desulfurization towers are commonly used in industry to remove sulfides from gases. The gas entering these towers typically contains moisture, which in turn contains hydrocarbons. In traditional IHO desulfurization tower designs, the gas directly contacts the catalyst packing layer for desulfurization. This has drawbacks; for example, hydrocarbons in the gas can react with the catalyst packing layer, leading to a decrease in catalyst performance and affecting the desulfurization effect. Utility Model Content
[0003] The problem this invention solves is how to reduce the moisture content in gas.
[0004] To address the aforementioned problems, this invention provides a hydroxyl iron oxide desulfurization tower and desulfurization system.
[0005] In a first aspect, this utility model provides a hydroxyl iron oxide desulfurization tower, including a tower body; a desulfurization chamber is provided inside the tower body; an outlet and an inlet communicating with the desulfurization chamber are respectively provided at the top and bottom of the tower body; a flow guide plate, a gas distributor, and a desulfurization packing layer are arranged sequentially from bottom to top inside the desulfurization chamber; the flow guide plate is a conical tube open at both ends, with the end of the flow guide plate with a larger outer diameter close to the gas distributor and sealed to the inner wall of the desulfurization chamber; the gas distributor includes a plurality of demisters arranged radially at intervals along the desulfurization chamber; the gap between adjacent demisters forms a gas flow channel.
[0006] This utility model's hydroxyl iron oxide desulfurization tower is equipped with a flow guide plate, a gas distributor, and a desulfurization packing layer. Because the flow guide plate is a hollow frustum-shaped cone with a smaller bottom outer diameter than the top outer diameter, the through-hole at the bottom is small. When sulfur-containing gas enters the desulfurization chamber through the inlet, a small amount of gas passes directly through the through-hole, while most of the gas collides with the outer wall of the flow guide plate. Liquid droplets entrained in the gas flow down the outer wall of the flow guide plate and the inner wall of the desulfurization chamber, achieving the first removal of moisture from the gas. The gas passing through the through-hole is guided and diffused between the flow channel and the gas distributor via the inner wall of the flow guide plate, and then rises further through multiple gas flow channels of the gas distributor. When the gas contacts the demister plate, droplet separation is achieved, resulting in a second removal of moisture from the gas. The gas distributor also ensures more uniform gas distribution, better contact with the upper desulfurization packing layer, improved desulfurization effect, guaranteed exhaust gas compliance, and increased packing utilization. This utility model of hydroxyl iron oxide desulfurization tower utilizes a flow guide plate and a gas distributor to remove most of the moisture from sulfur-containing gas, reducing the probability of moisture and hydrocarbons contained in the moisture coming into contact with the desulfurization packing layer. This avoids reactions between moisture and hydrocarbons and the packing material in the desulfurization packing layer, which could lead to a decline in packing performance, thus improving the desulfurization effect and service life of the desulfurization packing layer. At the same time, the gas distributor, formed by the spaced arrangement, also enables more uniform gas distribution and better contact with the desulfurization packing layer above, improving the desulfurization effect and the utilization rate of the packing material.
[0007] Optionally, the demister plate has at least one bend in the extension direction of the desulfurization chamber.
[0008] Optionally, the width of the gas flow channel increases continuously in the direction of extension from the middle of the desulfurization chamber to both sides.
[0009] Optionally, an annular baffle is provided between the flow guide plate and the bottom of the desulfurization chamber; the top of the annular baffle is sealed to the inner wall of the desulfurization chamber, and there is a gap between the bottom of the annular baffle and the inner wall of the desulfurization chamber; the air inlet is located on the side wall of the tower body between the top and bottom of the annular baffle.
[0010] Optionally, the desulfurization packing layer includes, from bottom to top, a grid plate, a magnetic ball layer, a metal wire mesh, a desulfurizing agent layer, and a metal wire mesh; the grid plate is detachably connected to the inner wall of the desulfurization chamber.
[0011] Optionally, a tensioning structure is provided between the top wire mesh and the grating plate.
[0012] Optionally, the desulfurization chamber is provided with two layers of desulfurization packing material arranged at intervals; the height of the desulfurization packing material layer is 1.5-3m.
[0013] Optionally, the air outlet is provided with a wire mesh for filter media.
[0014] Secondly, this utility model provides a desulfurization system, including a hydroxyl iron oxide desulfurization tower.
[0015] Optionally, it includes an inlet pipe and an outlet pipe; the inlets of several iron hydroxyl oxide desulfurization towers are all connected to the inlet pipe, and each iron hydroxyl oxide desulfurization tower is provided with an inlet valve between itself and the inlet pipe; the outlets of several iron hydroxyl oxide desulfurization towers are all connected to the outlet pipe, and each iron hydroxyl oxide desulfurization tower is provided with an outlet valve between itself and the outlet pipe; wherein, at least one iron hydroxyl oxide desulfurization tower has its inlet valve and outlet valve in a closed state. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of a hydroxyl iron oxide desulfurization tower;
[0017] Figure 2 A schematic diagram of a drainage guide plate;
[0018] Figure 3 A schematic diagram of a gas distributor;
[0019] Figure 4 This is a schematic diagram of the desulfurization packing layer.
[0020] Figure 5 This is a simplified structural diagram of a desulfurization system.
[0021] Explanation of reference numerals in the attached figures:
[0022] 1. Tower body; 2. Guide plate; 21. Through hole; 3. Gas distributor; 31. Demister plate; 32. Connecting rod; 33. Gas flow channel; 4. Desulfurization packing layer; 41. Grating plate; 42. Magnetic ball layer; 43. Metal wire mesh; 44. Desulfurizing agent layer; 5. Annular baffle. Detailed Implementation
[0023] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.
[0024] In the attached diagram, the Z-axis represents the vertical direction, i.e., up and down, with the positive direction of the Z-axis representing up and the negative direction representing down. The X-axis represents the horizontal direction and is designated as the front and back position, with the positive direction of the X-axis representing the front and the negative direction representing the back. The Y-axis represents the left and right position, with the positive direction of the Y-axis representing the left and the negative direction representing the right. It should be noted that the aforementioned representations of the Z, Y, and X axes are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0025] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.
[0026] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".
[0027] like Figure 1-4 As shown in the figure, the present invention provides a hydroxyl iron oxide desulfurization tower, including a tower body 1; a desulfurization chamber is provided inside the tower body 1; an outlet and an inlet communicating with the desulfurization chamber are respectively provided at the top and bottom of the tower body 1; a flow guide plate 2, a gas distributor 3 and a desulfurization packing layer 4 are arranged sequentially from bottom to top in the desulfurization chamber; the flow guide plate 2 is in the shape of a hollow frustum cone, and the end of the flow guide plate 2 with a larger outer diameter is close to the gas distributor 3 and is sealed to the inner wall of the desulfurization chamber; the gas distributor 3 includes a plurality of demister plates 31 arranged radially at intervals along the desulfurization chamber; the gap between adjacent demister plates 31 forms a gas flow channel 33.
[0028] Specifically, the main structure of this hydroxyl iron oxide desulfurization tower includes a tower body 1, which is columnar in shape, such as cylindrical or rectangular. It is constructed entirely from 12mm thick Q345R steel plates, rolled and welded together. Both the inner and outer surfaces are coated with two layers of epoxy resin anti-corrosion coating, effectively resisting corrosion from acidic and alkaline substances during the desulfurization process. The outlet at the top of the tower body 1 is equipped with a flange structure for connecting to subsequent gas treatment pipelines; the inlet at the bottom is also equipped with a flange for connection to pipelines. Inlet valves, outlet valves, and pressure sensors can also be installed on the inlet and outlet pipelines to monitor and adjust the inlet and outlet flow rates and pressures in real time, ensuring stable operation of the hydroxyl iron oxide desulfurization tower.
[0029] The guide plate 2 is a conical tube open at both ends, integrally molded from 8mm thick polyvinylidene fluoride (PVDF) sheet, a material with excellent chemical stability and high-temperature resistance. The larger outer diameter end of the guide plate 2 is sealed to the inner wall of the desulfurization chamber via a ring-shaped sealing ring and bolts. The sealing ring is made of silicone rubber, ensuring a good seal while accommodating thermal expansion and contraction. The overall outer diameter of the guide plate 2 decreases from top to bottom, meaning the outer and inner diameters of the top are larger than those of the bottom. For details, please refer to... Figure 2 When the desulfurization chamber is cylindrical, the guide plate 2 can be designed as a trumpet shape, with the larger opening located above the desulfurization chamber and sealed to the interior of the chamber. As gas enters the bottom of the desulfurization chamber through the inlet and flows to the outlet, due to the small opening 21 at the bottom of the guide plate 2, less gas passes directly through the opening 21, while most of the gas collides with the outer wall of the guide plate 2. Furthermore, the moisture entrained in the gas liquefies into droplets and flows down the outer wall of the guide plate 2 and the inner wall of the desulfurization chamber, accumulating at the bottom of the chamber.
[0030] The gas distributor 3 consists of multiple demister plates 31 spaced apart within the desulfurization chamber. The demister plates 31 can be made of glass fiber reinforced polypropylene (FRPP). FRPP is lightweight, high-strength, and has high demisting efficiency. The multiple demister plates 31 are arranged radially spaced within the desulfurization chamber. The length of each demister plate 31 is adapted to the inner diameter of the desulfurization chamber so that both ends of each demister plate 31 can connect to the inner wall of the chamber. For example, when the desulfurization chamber is cylindrical, the length of the demister plates 31 near the sides of the chamber is shorter, and the length of the demister plates 31 near the center of the chamber is longer. To improve the stability of the demister plates 31, multiple connecting rods 32 can be installed at the top and bottom of the rows of demister plates 31. Figure 3The connecting rod 32 is arranged parallel to the direction of the demister plate 31, and the connecting rod 32 and the demister plate 31 can be connected by bonding or welding. During installation, a ring-shaped bracket can be installed inside the desulfurization chamber, and the connected gas distributor 3 can be placed on the bracket. Furthermore, a hydrophilic coating can be applied to the surface of the demister plate 31. When gas containing mist droplets passes through the gas flow channel 33, the droplets collide with and adhere to the surface of the demister plate 31 under the action of inertial force and surface tension, and then slide down to the guide plate 2 under gravity, and are guided to the bottom of the desulfurization chamber by the guide plate 2.
[0031] The main component of the desulfurization packing layer 4 is iron hydroxyl oxide (≥80%), supplemented with binder and compressive packing.
[0032] When sulfur-containing gas enters the desulfurization chamber through the inlet, it passes through the guide plate 2. After colliding with the guide plate 2 to remove some water droplets, it enters the gas distributor 3 through the central through-hole 21. In the gas distributor 3, the gas passes through the gas flow channel 33 between the demister plates 31, achieving droplet separation and further removing moisture. The gas after demistering enters the desulfurization packing layer 4, where it comes into full contact with the desulfurizing agent and undergoes a chemical reaction to remove sulfides from the sulfur-containing gas. The desulfurized gas is then discharged from the tower through the outlet, completing the entire desulfurization process.
[0033] In this embodiment, the hydroxyl iron oxide desulfurization tower is equipped with a flow guide plate 2, a gas distributor 3, and a desulfurization packing layer 4. Since the flow guide plate 2 is a hollow frustum-shaped cone with a smaller bottom outer diameter than the top outer diameter, the bottom through-hole 21 is smaller. When sulfur-containing gas enters the desulfurization chamber through the inlet, a small amount of gas will directly pass through the through-hole 21, while most of the gas will collide with the outer wall of the flow guide plate 2. The liquid droplets entrained in the gas will flow down along the outer wall of the flow guide plate 2 and the inner wall of the desulfurization chamber, achieving the first removal of moisture from the gas. The gas passing through the through-hole 21 is guided and diffused between the flow channel and the gas distributor 3 by the inner wall of the flow guide plate 2, and then rises further through the multiple gas flow channels 33 of the gas distributor 3. When the gas comes into contact with the demister plate 31, droplet separation can be achieved, removing moisture from the gas for the second time. The gas distributor 3 can also make the gas distribution more uniform, better contact with the desulfurization packing layer 4 above, improve the desulfurization effect, ensure that the tail gas meets the standards, and improve the utilization rate of the packing. The hydroxyl iron oxide desulfurization tower of this invention utilizes the flow guide plate 2 and the gas distributor 3 to remove most of the moisture in the sulfur-containing gas, reducing the probability of moisture and hydrocarbons contained in the moisture coming into contact with the desulfurization packing layer 4. This avoids the reaction between moisture and hydrocarbons and the packing material in the desulfurization packing layer 4, which would lead to a decrease in packing performance, thus improving the desulfurization effect and service life of the desulfurization packing layer 4. At the same time, the gas distributor 3, which is arranged at intervals, can also make the gas distribution more uniform and better contact with the desulfurization packing layer 4 above, improving the desulfurization effect and the utilization rate of the packing material.
[0034] Optionally, the demister plate 31 has at least one bend in the extension direction of the desulfurization chamber.
[0035] Specifically, the design of the bent section of the demister plate 31 allows for a curved section in the gas flow channel 33 between adjacent demister plates 31, ensuring sufficient collision and contact between the gas and the demister plate 31, thereby improving the moisture removal effect of the demister plate 31. Please refer to... Figure 3 The demister plate 31 in the figure has two continuous bending sections, that is, the demister plate 31 is roughly S-shaped.
[0036] Optionally, the width of the gas flow channel 33 increases continuously in the direction of extension from the middle of the desulfurization chamber to both sides.
[0037] Specifically, since the through hole 21 at the bottom of the guide plate 2 is located in the middle, the gas flow rate is larger in the middle and smaller on both sides before the gas enters the gas flow channel 33. Therefore, setting the width of the gas flow channel 33 in the middle to be smaller than that of the gas flow channels 33 on both sides can improve the uniformity of gas distribution and enhance the desulfurization effect of the subsequent desulfurization packing layer 4. Furthermore, for ease of design and installation, the gas flow channel 33 can be divided into three sections: the middle section is the narrow-width section, and the two sides are the wide-width sections. In each section, the width of the gas flow channel 33 is the same. This three-section structure design reduces the width variation of the gas flow channel 33 and facilitates the installation of the gas distributor 3.
[0038] Optionally, an annular baffle 5 is provided between the flow guide plate 2 and the bottom of the desulfurization chamber; the top of the annular baffle 5 is sealed to the inner wall of the desulfurization chamber, and there is a gap between the bottom of the annular baffle 5 and the inner wall of the desulfurization chamber; the air inlet is located on the side wall of the tower body 1 between the top and bottom of the annular baffle 5.
[0039] Specifically, because the air inlet is located on the side wall of tower body 1, when the gas enters the desulfurization chamber, it causes a local pressure difference within the chamber. This can lead to the churning of moisture at the bottom, generating bubbles and increasing the moisture content of the gas. By installing an annular baffle 5, a circular channel is created between the baffle and the inner wall of the desulfurization chamber, which guides the gas and allows it to diffuse as evenly as possible within the chamber, reducing the pressure difference. Simultaneously, the side wall of the annular baffle 5 also helps to remove some moisture from the gas.
[0040] Optionally, the desulfurization packing layer 4 includes, from bottom to top, a grid plate 41, a magnetic ball layer 42, a metal wire mesh 43, a desulfurizing agent layer 44, and a metal wire mesh 43; the grid plate 41 is detachably connected to the inner wall of the desulfurization chamber.
[0041] For specific details, please refer to... Figure 4 The grating plate 41 is made of stainless steel with a mesh size of 15mm × 15mm, which supports the upper packing layer while ensuring smooth gas passage. Magnetic balls are laid on the grating plate 41 with a thickness of 80mm, forming a magnetic ball layer 42. Metal wire mesh 43 is laid on the magnetic ball layer 42, with a mesh size of less than 4mm. The desulfurization layer is located between the two layers of metal wire mesh 43. The desulfurizing agent in the desulfurization layer is an iron hydroxyl oxide (FeOOH)-based desulfurizing agent. The desulfurization layer is laid using a "segmented filling method," with manual or mechanical leveling after every 30-50cm of filling to avoid local accumulation. The height of the desulfurization packing layer 4 is generally set at 1.5-3m.
[0042] Furthermore, in order to improve the desulfurization effect, in some embodiments, the desulfurization packing layer 4 can be set as two layers, with the two layers spaced apart.
[0043] Optionally, a tensioning structure is provided between the top wire mesh 43 and the grid plate 41.
[0044] Specifically, the tensioning structure can adjust the height and tension between the top wire mesh 43 and the grid plate 41, preventing gas from impacting the desulfurization packing layer 4 and causing it to loosen, thus preventing the desulfurizing agent from being blown away. The specific type of tensioning structure is not limited; for example, it can be a tension spring, directly connected between the top wire mesh 43 and the grid plate 41, using the tension of the spring to maintain the stability of the desulfurization packing layer 4. Alternatively, it can be a bolt structure, with bolt threads penetrating the wire mesh 43 and the grid plate 41, which can also maintain the stability of the desulfurization packing layer 4.
[0045] Optionally, the air outlet is provided with a wire mesh for filter media.
[0046] Specifically, by setting up a wire mesh, the filler particles of hydroxyl iron oxide can be prevented from entering the downstream pipeline.
[0047] This utility model provides a desulfurization system, including the hydroxyl iron oxide desulfurization tower as described above.
[0048] The desulfurization system in this embodiment also includes an inlet pipe and an outlet pipe; the inlets at the bottom of several iron hydroxyl oxide desulfurization towers are all connected to the inlet pipes, and an inlet valve is provided between the iron hydroxyl oxide desulfurization towers and the inlet pipes; the outlets at the top of several iron hydroxyl oxide desulfurization towers are all connected to the outlet pipes, and an outlet valve is provided between the iron hydroxyl oxide desulfurization towers and the outlet pipes; wherein, the inlet valve and outlet valve corresponding to at least one iron hydroxyl oxide desulfurization tower are in the closed state.
[0049] For specific details, please refer to... Figure 5 Several ferric hydroxide desulfurization towers are connected in parallel between the inlet and outlet pipes, with at least one tower in standby mode. When it is necessary to replace the desulfurization packing layer 4 online, the ferric hydroxide desulfurization towers are switched off one by one via valve switching to achieve non-stop replacement. The specific operating steps include: cutting off the raw gas, closing the inlet valve, gradually reducing the pressure inside the tower to atmospheric pressure at a rate of 0.1 MPa every 2 minutes, and finally closing the outlet valve to isolate the ferric hydroxide desulfurization tower from the production system; opening the pre-set vent valve at the top of the tower; opening the pre-set inlet orifice plate at the bottom of the tower, and under natural ventilation conditions, the ferric hydroxide desulfurization tower slowly performs gas replacement. To accelerate the regeneration speed, compressed air or saturated steam can be introduced, but the tower temperature must be controlled, not exceeding 60℃ and not exceeding 80℃, otherwise sulfur sublimation and spontaneous combustion will occur, causing damage to the desulfurizing agent and its equipment. The replacement is considered complete when the bed temperature does not rise and the oxygen content at the inlet and outlet is basically equal; finally, the discharge port is opened to discharge the desulfurizing agent.
[0050] The desulfurization system in this embodiment has the same beneficial effects as the prior art compared to the hydroxyl iron oxide desulfurization tower described above, and will not be repeated here.
[0051] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.
Claims
1. An iron oxyhydroxide desulfurization tower characterized by, The application relates to a hydroxyl iron oxide desulfurization tower, which comprises a tower body (1); a desulfurization cavity is arranged in the tower body (1); an air outlet and an air inlet are arranged at the top and the bottom of the tower body (1) respectively and are communicated with the desulfurization cavity; a flow guide plate (2), a gas distributor (3) and a desulfurization filler layer (4) are sequentially arranged in the desulfurization cavity from bottom to top; the flow guide plate (2) is in the shape of a conical cylinder with open ends, the outer diameter of one end of the flow guide plate (2) is close to the gas distributor (3), and the flow guide plate (2) is sealingly connected with the inner wall of the desulfurization cavity; the gas distributor (3) comprises a plurality of demisting plates (31) which are arranged at intervals in the radial direction of the desulfurization cavity; the gaps between adjacent demisting plates (31) form gas flow channels (33).
2. The ferric oxyhydroxide desulfurization tower according to claim 1, characterized in that, In the extension direction of the desulfurization cavity, the demisting plate (31) has at least one bending section.
3. The ferric oxyhydroxide desulfurization tower according to claim 1, characterized in that, The width of the gas flow channel (33) continuously increases in the extension direction from the middle of the desulfurization cavity to both sides.
4. The ferric oxyhydroxide desulfurization tower according to claim 1, characterized in that, An annular baffle (5) is arranged between the flow guide plate (2) and the bottom of the desulfurization cavity; the top of the annular baffle (5) is sealingly connected with the inner wall of the desulfurization cavity, and a gap exists between the bottom of the annular baffle (5) and the inner wall of the desulfurization cavity; the air inlet is arranged on the side wall of the tower body (1) between the top and the bottom of the annular baffle (5).
5. The ferric oxyhydroxide desulfurization tower according to claim 1, characterized in that, The desulfurization filler layer (4) sequentially comprises a grid plate (41), a magnetic ball layer (42), a metal wire mesh (43), a desulfurization agent layer (44) and a metal wire mesh (43) from bottom to top; the grid plate (41) is detachably connected with the inner wall of the desulfurization cavity.
6. The ferric oxyhydroxide desulfurization tower according to claim 5, characterized in that, A tensioning structure is arranged between the metal wire mesh (43) at the top and the grid plate (41).
7. The ferric oxyhydroxide desulfurization tower according to claim 1, characterized in that, Two layers of desulfurization filler layers (4) are arranged in the desulfurization cavity at intervals; the height of the desulfurization filler layer (4) is 1.5-3 m.
8. The ferric oxyhydroxide desulfurization tower according to claim 1, characterized in that, The air outlet is provided with a wire mesh for filtering fillers.
9. A desulfurization system characterized by, The application further discloses a hydroxyl iron oxide desulfurization tower system.
10. The desulfurization system according to claim 9, characterized by, The application further discloses a hydroxyl iron oxide desulfurization tower system, which comprises an air inlet pipeline and an air outlet pipeline; the air inlets of a plurality of the hydroxyl iron oxide desulfurization towers are connected with the air inlet pipeline, and an air inlet valve is arranged between each of the hydroxyl iron oxide desulfurization towers and the air inlet pipeline; the air outlets of a plurality of the hydroxyl iron oxide desulfurization towers are connected with the air outlet pipeline, and an air outlet valve is arranged between each of the hydroxyl iron oxide desulfurization towers and the air outlet pipeline; wherein the air inlet valve and the air outlet valve corresponding to at least one of the hydroxyl iron oxide desulfurization towers are in the closed state.