A fine desulfurization system for blast furnace gas

Abstract

The utility model discloses a kind of for blast furnace gas's fine desulfurization system, including dust removal component, temperature regulating component, hydrolysis component and first filter, by setting parallel first branch pipe and second branch pipe ensure the continuity of gas processing, do not affect the normal production of blast furnace, while the setting of first control valve group and second control valve group, the flow of two branch pipes can be flexibly adjusted, adapt to different working condition requirement, improve the adaptability and flexibility of system.Temperature regulating component can accurately adjust the temperature of gas to target temperature, improve the activity and reaction efficiency of hydrolysis catalyst, reduce the performance decline of catalyst due to temperature fluctuation, convert organic sulfur into inorganic sulfur by hydrolysis catalyst, effectively reduce the organic sulfur content in gas, improve desulfurization efficiency, first filter removes particulate matter or impurities that may be generated during hydrolysis process, protect subsequent equipment from pollution, prolong equipment service life, improve operation safety.

Description

Technical Field

[0001] This application relates to the field of blast furnace gas treatment technology, and in particular to a fine desulfurization system for blast furnace gas. Background Technology

[0002] The core of blast furnace gas desulfurization technology lies in using a hydrolysis catalyst to convert organic sulfur in the gas into inorganic sulfur, which is then removed. However, commonly used hydrolysis catalysts on the market have certain shortcomings in terms of dust resistance, oxygen resistance, and chloride resistance. To address this issue, a pretreatment process is typically incorporated into the hydrolysis catalyst unit to reduce the concentration of impurities such as dust and chlorides, keeping them within a suitable range and thus mitigating their impact on the catalyst. Despite this pretreatment process, some technical deficiencies still exist in actual operation. For example, the temperature control in some pretreatment units is not precise enough, affecting the efficiency and effectiveness of the hydrolysis reaction. Furthermore, some dechlorination methods fail to remove chlorides to a suitable concentration, leading to premature catalyst poisoning and shortening the catalyst's lifespan. These problems not only increase production costs but may also affect the stable operation of the entire desulfurization system.

[0003] The high-pressure side hydrolysis unit is strategically located, situated on the connecting pipeline between the blast furnace gas dry dust removal process and the blast furnace gas residual pressure power generation system. This location dictates that the gas passage must remain unobstructed, as it serves as the inlet for the blast furnace gas residual pressure power generation unit, playing a crucial role in ensuring the normal operation of the differential pressure power generation equipment. Problems with the hydrolysis unit will not only disrupt the normal production rhythm of the blast furnace but also affect the accuracy of the differential pressure power generation operating parameters. In severe cases, it could even trigger production safety accidents in blast furnace production or for downstream blast furnace gas users. Therefore, the safety and reliability of the high-pressure side hydrolysis unit must be given high priority to ensure the stable operation and safe production of the entire blast furnace gas treatment system. Utility Model Content

[0004] In view of the deficiencies in the prior art, this application provides a fine desulfurization system for blast furnace gas to solve the problems of poor reliability and low safety in the dechlorination treatment of blast furnace gas in the prior art.

[0005] The above-mentioned objectives of this application are mainly achieved through the following technical solutions:

[0006] A fine desulfurization system for blast furnace gas, the fine desulfurization system comprising:

[0007] A dust removal assembly is connected to the exhaust end of the blast furnace. The exhaust end of the dust removal assembly is connected to a first branch pipe and a second branch pipe arranged in parallel. A first control valve group is provided on the first branch pipe, and a second control valve group is provided on the second branch pipe.

[0008] A temperature regulating component is provided on the first branch pipe, and the temperature regulating component can regulate the gas in the first branch pipe to the target temperature.

[0009] A hydrolysis component is connected to the first branch pipe and arranged on the side of the temperature regulating component away from the dust removal component;

[0010] The first filter is connected to the first branch pipe and is arranged on the side of the hydrolysis assembly away from the temperature regulation assembly.

[0011] In an optional embodiment, the dust removal assembly includes a gravity dust collector and a bag filter connected in series.

[0012] In an optional embodiment, a chlorine powder spraying pipe section is connected in series between the gravity dust collector and the bag dust collector.

[0013] In an optional embodiment, the fine desulfurization system further includes a dechlorination powder preparation device, and a connecting section is provided between the dechlorination powder preparation device and the chlorination powder spraying pipe section. The connecting section is provided with a dechlorination powder nozzle, a dechlorination powder check valve, and a dechlorination powder safety valve.

[0014] In an optional embodiment, the dechlorination powder preparation device is provided in two sets.

[0015] In an optional embodiment, the hydrolysis assembly is provided with a vent pipe, and the vent pipe is provided with a vent shut-off valve and a vent safety valve.

[0016] In an optional embodiment, the first control valve group includes a temperature-regulating pre-shut-off valve and a temperature-regulating pre-spectacle valve, wherein the temperature-regulating pre-shut-off valve and the temperature-regulating pre-spectacle valve are respectively arranged between the temperature regulating assembly and the dust removal assembly.

[0017] In an optional embodiment, the second control valve assembly includes a bypass regulating valve and a bypass safety valve, which are arranged in parallel on the second branch pipe.

[0018] In an optional embodiment, a filter bypass control valve is provided on the first branch and arranged in parallel with the first filter.

[0019] In an optional embodiment, the first branch is further provided with a post-filter spectacle valve and a filter shut-off valve, the post-filter spectacle valve and the filter shut-off valve being arranged in series on the side of the first filter away from the hydrolysis component.

[0020] Compared with the prior art, the advantages of this application are:

[0021] The fine desulfurization system of this application is used for the treatment of blast furnace gas. The fine desulfurization system includes a dust removal component, a temperature regulation component, a hydrolysis component, and a first filter. The dust removal component is connected to the exhaust end of the blast furnace. The exhaust end of the dust removal component is connected to a first branch pipe and a second branch pipe in parallel. The first branch pipe is equipped with a first control valve group, and the second branch pipe is equipped with a second control valve group. The temperature regulation component is located on the first branch pipe and can regulate the gas in the first branch pipe to a target temperature. The hydrolysis component is connected to the first branch pipe and is located on the side of the temperature regulation component away from the dust removal component. The first filter is connected to the first branch pipe and is located on the side of the hydrolysis component away from the temperature regulation component.

[0022] The blast furnace gas first passes through a dust removal assembly to remove dust and impurities, reducing the adverse effects of dust on subsequent equipment and catalysts. A first control valve group is installed on the first branch pipe, and a second control valve group is installed on the second branch pipe. These control valve groups allow for flexible adjustment of the flow state in the first and second branch pipes, enabling redundant system design and flexible switching. A temperature regulation assembly on the first branch pipe adjusts the gas temperature to the target temperature. Temperature control is a key factor in the hydrolysis reaction; a suitable temperature helps improve the activity and reaction efficiency of the hydrolysis catalyst. Subsequently, the gas enters the hydrolysis assembly, where the hydrolysis catalyst converts organic sulfur in the gas into inorganic sulfur, reducing the organic sulfur content through the hydrolysis reaction. The hydrolyzed gas then passes through a first filter to further remove any particulate matter or impurities, ensuring the cleanliness of the gas and providing a guarantee for subsequent desulfurization treatment or use.

[0023] The fine desulfurization system features a redundant design with parallel first and second branch pipes. When components in the first branch pipe require maintenance or malfunction, the system can switch to the second branch pipe, ensuring continuous gas treatment and uninterrupted blast furnace production. The first and second control valve groups allow for flexible flow adjustment in both branches to adapt to different operating conditions, enhancing the system's adaptability and flexibility. The temperature control component precisely regulates the gas temperature to the target temperature, providing optimal conditions for the hydrolysis reaction. This improves the activity and reaction efficiency of the hydrolysis catalyst, reduces catalyst performance degradation due to temperature fluctuations, and ultimately enhances desulfurization efficiency. The hydrolysis component, as the core of the system, converts organic sulfur into inorganic sulfur through the hydrolysis catalyst, effectively reducing the organic sulfur content in the gas and improving desulfurization efficiency. The first filter removes particulate matter or impurities that may be generated during hydrolysis, protecting downstream equipment from contamination, extending equipment lifespan, and ensuring gas cleanliness for subsequent use or treatment, thus improving operational safety. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the fine desulfurization system provided in the embodiments of this application;

[0026] In the diagram: 101, Gravity dust collector; 102, Bag filter; 103, Chlorine powder spraying pipe section; 201, First branch pipe; 202, Second branch pipe; 203, First control valve group; 204, Second control valve group; 301, Temperature regulating component; 302, Hydrolysis component; 303, First filter; 400, Chlorine powder preparation device; 401, Connecting section; 402, Chlorine powder nozzle; 403, Chlorine powder check valve; 404, Chlorine powder safety valve; 501, Venting pipe; 502, Venting shut-off valve; 503, Venting safety valve; 601, Temperature regulating pre-shut-off valve; 602, Temperature regulating pre-spectrum valve; 603, Bypass regulating valve; 604, Bypass safety valve; 605, Filtration bypass control valve; 606, Filtration post-spectrum valve; 607, Filtration shut-off valve; 700, Blast furnace. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to aid in understanding the present invention, but does not constitute a limitation thereof. The specific structural and functional details disclosed herein are only for describing exemplary embodiments of the present invention. However, the present invention may be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0028] like Figure 1 As shown, Figure 1 This is a schematic diagram of a fine desulfurization system provided in an embodiment of this application. The fine desulfurization system for blast furnace 700 gas includes a dust removal component, a temperature control component 301, a hydrolysis component 302, and a first filter 303, wherein:

[0029] like Figure 1 As shown, the dust removal component is connected to the exhaust end of the blast furnace 700. The exhaust end of the dust removal component is connected to a first branch pipe 201 and a second branch pipe 202 arranged in parallel. The first branch pipe 201 is provided with a first control valve group 203, and the second branch pipe 202 is provided with a second control valve group 204.

[0030] like Figure 1As shown, the dust removal component, as the front-end equipment of the system, is directly connected to the exhaust end of the blast furnace 700 and is responsible for the preliminary treatment of the gas produced by the blast furnace 700, removing dust and impurities. This process is crucial because dust not only affects the normal operation of subsequent equipment but may also reduce the activity of the hydrolysis catalyst, thereby affecting the efficiency of the entire desulfurization system. The gas, after dust removal treatment, is discharged from the exhaust end of the dust removal component. At this point, the first branch pipe 201 and the second branch pipe 202, which are connected in parallel on the exhaust end of the dust removal component, provide two parallel channels for the subsequent treatment of the gas. The first branch pipe 201 is equipped with a first control valve group 203, and the second branch pipe 202 is equipped with a second control valve group 204. Through these two sets of control valves, the operator can flexibly adjust the flow distribution of the two branch pipes, realizing the redundancy design and flexible switching of the system. This not only improves the reliability and stability of the system, but also greatly facilitates the maintenance and repair of the equipment. When the equipment in the first branch pipe 201 needs maintenance or malfunctions, it can be quickly switched to the second branch pipe 202 to ensure the continuity of gas treatment and not affect the normal production of blast furnace 700.

[0031] like Figure 1 As shown, a temperature regulating component 301 is installed on the first branch pipe 201. This component regulates the gas temperature within the first branch pipe 201 to the target temperature. The temperature regulating component 301 is located immediately following the dust removal component on the first branch pipe 201. The function of the temperature regulating component 301 is to adjust the gas temperature within the first branch pipe 201 to the target temperature. Temperature control is one of the key factors in the hydrolysis reaction. A suitable temperature can significantly improve the activity and reaction efficiency of the hydrolysis catalyst, thereby ensuring the smooth progress of the hydrolysis reaction. Through precise temperature regulation, the system can create optimal conditions for the subsequent hydrolysis reaction, thereby improving the performance and efficiency of the entire desulfurization system.

[0032] like Figure 1 As shown, the temperature control component 301 is a key device for ensuring that the gas temperature is within a suitable range. The temperature control component 301 can be a water-jacketed boiler with a heat storage heat exchanger, a heat exchanger, a spray cooling device, or a PID temperature controller. Each of these temperature control components 301 has its own characteristics and is suitable for different operating conditions and requirements. In the blast furnace 700 gas desulfurization system, selecting a suitable temperature control device can effectively improve the system's operating efficiency and stability, ensuring that the gas temperature is within a suitable range, thereby improving the desulfurization effect and extending the equipment's service life.

[0033] like Figure 1As shown, the hydrolysis component 302 is connected to the first branch pipe 201 and arranged on the side of the temperature regulating component 301 away from the dust removal component. The hydrolysis component 302 is connected to the first branch pipe 201 and arranged on the side of the temperature regulating component 301 away from the dust removal component. The flow sequence of the coal gas in the pipeline is fully considered to ensure that the coal gas can enter the hydrolysis component 302 in a timely manner after temperature regulation. Within the hydrolysis component 302, the hydrolysis catalyst plays a key role, converting organic sulfur in the coal gas into inorganic sulfur. Through the hydrolysis reaction, the organic sulfur content in the coal gas is effectively reduced, thereby achieving preliminary purification of the coal gas.

[0034] like Figure 1 As shown, in an optional embodiment, the hydrolysis component 302 is configured as a composite hydrolysis tower.

[0035] The first filter 303 is connected to the first branch pipe 201 and is arranged on the side of the hydrolysis component 302 away from the temperature regulation component 301. Although most of the organic sulfur has been removed from the gas after the hydrolysis reaction, some particulate matter or impurities may still remain. The function of the first filter 303 is to further filter and remove these residual impurities, ensuring the cleanliness of the gas and providing a guarantee for subsequent desulfurization treatment or use. Through the filtration effect of the first filter 303, the quality of the gas is further improved, while also protecting downstream equipment from contamination and extending the service life of the equipment.

[0036] In an optional implementation, the first filter 303 is configured as a dust filter.

[0037] like Figure 1 As shown, in an optional embodiment, the fine desulfurization system of this application is used for the treatment of blast furnace 700 gas. The fine desulfurization system includes a dust removal component, a temperature regulation component 301, a hydrolysis component 302, and a first filter 303. The dust removal component is connected to the exhaust end of the blast furnace 700. The exhaust end of the dust removal component is connected to a first branch pipe 201 and a second branch pipe 202 arranged in parallel. The first branch pipe 201 is provided with a first control valve group 203, and the second branch pipe 202 is provided with a second control valve group 204. The temperature regulation component 301 is provided on the first branch pipe 201, and the temperature regulation component 301 can regulate the gas in the first branch pipe 201 to a target temperature. The hydrolysis component 302 is connected to the first branch pipe 201 and arranged on the side of the temperature regulation component 301 away from the dust removal component. The first filter 303 is connected to the first branch pipe 201 and arranged on the side of the hydrolysis component 302 away from the temperature regulation component 301.

[0038] like Figure 1As shown, the gas produced by blast furnace 700 first passes through a dust removal assembly to remove dust and impurities, reducing the adverse effects of dust on subsequent equipment and catalysts. A first control valve group 203 is installed on the first branch pipe 201, and a second control valve group 204 is installed on the second branch pipe 202. The flow state of the first and second branch pipes 201 and 202 can be flexibly adjusted through the first control valve group 203, achieving redundant design and flexible switching of the system. A temperature regulating assembly 301 on the first branch pipe 201 regulates the gas temperature to the target temperature. Temperature control is one of the key factors in the hydrolysis reaction; a suitable temperature helps improve the activity and reaction efficiency of the hydrolysis catalyst. Subsequently, the gas enters the hydrolysis assembly 302, where the hydrolysis catalyst converts organic sulfur in the gas into inorganic sulfur, reducing the organic sulfur content through the hydrolysis reaction. The hydrolyzed gas then passes through a first filter 303 to further remove any particulate matter or impurities that may be generated, ensuring the cleanliness of the gas and providing a guarantee for subsequent desulfurization treatment or use.

[0039] like Figure 1 As shown, the desulfurization system features a redundant design with a first branch pipe 201 and a second branch pipe 202 connected in parallel. When components in the first branch pipe 201 require maintenance or malfunction, the system can switch to the second branch pipe 202, ensuring continuous gas treatment and not affecting the normal production of the blast furnace 700. Simultaneously, the first control valve group 203 and the second control valve group 204 allow for flexible flow adjustment of the two branches to adapt to different operating conditions, improving the system's adaptability and flexibility. The temperature regulation component 301 can precisely regulate the gas temperature to the target temperature, providing optimal conditions for the hydrolysis reaction, thereby improving the activity and reaction efficiency of the hydrolysis catalyst, reducing catalyst performance degradation caused by temperature fluctuations, and ultimately enhancing the desulfurization effect. As the core component of the system, the hydrolysis component 302 converts organic sulfur into inorganic sulfur through a hydrolysis catalyst, effectively reducing the organic sulfur content in the coal gas and improving desulfurization efficiency. The first filter 303 removes particulate matter or impurities that may be generated during the hydrolysis process, protecting downstream equipment from contamination, extending equipment service life, and ensuring the cleanliness of the coal gas, thus providing a guarantee for subsequent use or treatment and improving operational safety.

[0040] like Figure 1 As shown, in an optional embodiment, the dust removal assembly includes a gravity dust collector 101 and a bag dust collector 102 connected in series.

[0041] A gravity dust collector 101 and a bag filter 102 are connected in series. This combined dust collection method can effectively remove dust and impurities from the blast furnace gas. The gravity dust collector 101 utilizes the principle of gravity settling to initially remove large dust particles, while the bag filter 102 further removes fine dust particles through the filtration effect of the filter bags. This ensures that the dust content is at a low level when the gas enters the subsequent processing stage, thereby reducing the adverse effects of dust on the hydrolysis catalyst and improving the catalyst's service life and desulfurization efficiency.

[0042] like Figure 1 As shown, in an optional embodiment, a chlorine powder injection pipe section 103 is connected in series between the gravity dust collector 101 and the bag filter 102. The function of the chlorine powder injection pipe section 103 is to inject an appropriate amount of chlorine powder into the coal gas to adjust the composition of the coal gas and create more favorable conditions for the subsequent desulfurization reaction. The chlorine powder can combine and adsorb with the dust in the coal gas, and finally enter the bag filter 102 for removal, thereby improving the quality of the coal gas and further optimizing the desulfurization process.

[0043] like Figure 1 As shown, in an optional embodiment, the desulfurization system further includes a dechlorination powder preparation device 400. A connecting section 401 is provided between the dechlorination powder preparation device 400 and the chlorination powder injection pipe section 103. The connecting section 401 is equipped with a dechlorination powder nozzle 402, a dechlorination powder check valve 403, and a dechlorination powder safety valve 404. The dechlorination powder preparation device 400 is used to prepare the required chlorination powder, ensuring the quality and supply stability of the chlorination powder. The dechlorination powder nozzle 402 on the connecting section 401 can uniformly inject chlorination powder into the coal gas, while the dechlorination powder check valve 403 and the dechlorination powder safety valve 404 are respectively used to prevent coal gas backflow and ensure the safe operation of the system under abnormal conditions, thus guaranteeing the stability and safety of the entire system.

[0044] like Figure 1 As shown, in an optional embodiment, the dechlorination powder preparation device 400 is provided in two sets. The dual-set dechlorination powder preparation device 400 improves the redundancy and reliability of the system. When one set of dechlorination powder preparation devices 400 requires maintenance or malfunctions, the other set can continue to operate, ensuring an uninterrupted supply of chlorine powder, thereby guaranteeing the continuous and stable operation of the entire desulfurization system and improving the overall performance and reliability of the system.

[0045] like Figure 1As shown, in an optional embodiment, the hydrolysis component 302 is provided with a vent pipe 501, which is equipped with a vent shut-off valve 502 and a vent safety valve 503. The function of the vent pipe 501 is to safely discharge excess gas when the system needs to perform a venting operation. The vent shut-off valve 502 is used to control the start and stop of the venting operation, while the vent safety valve 503 automatically opens when the system pressure rises abnormally, releasing pressure and preventing the system from being dangerous due to overpressure, thus ensuring the safe operation of the hydrolysis component 302 and the entire system.

[0046] like Figure 1 As shown, in an optional embodiment, the first control valve group 203 includes a temperature-regulating pre-shut-off valve 601 and a temperature-regulating pre-spectacle valve 602, wherein the temperature-regulating pre-shut-off valve 601 and the temperature-regulating pre-spectacle valve 602 are respectively arranged between the temperature regulating assembly 301 and the dust removal assembly.

[0047] The temperature regulation pre-shut-off valve 601 is used to cut off the flow of gas when needed, so as to maintain or repair the temperature regulation component 301. The temperature regulation pre-spectrum valve 602 can quickly switch the conduction state after timely detection of abnormalities, ensuring the normal operation of the temperature regulation component 301 and the stable supply of gas.

[0048] like Figure 1 As shown, in an optional embodiment, the second control valve group 204 includes a bypass regulating valve 603 and a bypass safety valve 604, which are arranged in parallel on the second branch pipe 202. The bypass regulating valve 603 is used to regulate the flow rate of the second branch pipe 202. When the first branch pipe 201 malfunctions or requires maintenance, the gas can be switched to the second branch pipe 202 through the bypass regulating valve 603 to ensure the continuity of gas treatment. The bypass safety valve 604 automatically opens when the pressure in the second branch pipe 202 is abnormal, releasing pressure and ensuring the safe operation of the second branch pipe 202 and the entire system, further improving the reliability and safety of the system.

[0049] like Figure 1 As shown, in an optional embodiment, a filter bypass control valve 605 is provided on the first branch line, arranged in parallel with the first filter 303. The function of the filter bypass control valve 605 is to switch the gas to the bypass when the first filter 303 needs maintenance or malfunctions, bypassing the first filter 303, ensuring the normal flow of gas, while not affecting the operation of other parts of the system, improving the flexibility and reliability of the system, and ensuring the stable operation of the entire desulfurization system.

[0050] like Figure 1As shown, in an optional embodiment, the first branch is further provided with a post-filter spectacle valve 606 and a filter shut-off valve 607. The post-filter spectacle valve 606 and the filter shut-off valve 607 are arranged in series on the side of the first filter 303 away from the hydrolysis component 302. After the gas passes through the first filter 303, the post-filter spectacle valve 606 facilitates timely control operations when the filtration effect does not meet expectations. The filter shut-off valve 607 is used to cut off the flow of filtered gas when necessary, so as to perform maintenance or filter element replacement operations on the first filter 303, while ensuring the safety and stability of the system, further optimizing the operation and maintenance process of the entire desulfurization system.

[0051] It should be understood that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of this utility model.

[0052] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0053] It should be understood that in the description of this utility model, the terms "upper," "vertical," "inner," "outer," etc., indicate the orientation or positional relationship when the disclosed product is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0054] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0055] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” “containing,” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not exclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0056] Specific details are provided in the following description to provide a complete understanding of the exemplary embodiments. However, those skilled in the art will understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may be omitted in the depiction of non-essential details to avoid obscuring the exemplary embodiments.

[0057] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0058] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

Claims

1. A fine desulfurization system for blast furnace gas, characterized in that, The fine desulfurization system includes: A dust removal assembly is connected to the exhaust end of the blast furnace. The exhaust end of the dust removal assembly is connected to a first branch pipe and a second branch pipe arranged in parallel. A first control valve group is provided on the first branch pipe, and a second control valve group is provided on the second branch pipe. A temperature regulating component is provided on the first branch pipe, and the temperature regulating component can regulate the gas in the first branch pipe to the target temperature. A hydrolysis component is connected to the first branch pipe and arranged on the side of the temperature regulating component away from the dust removal component; The first filter is connected to the first branch pipe and is arranged on the side of the hydrolysis assembly away from the temperature regulation assembly.

2. The fine desulfurization system for blast furnace gas as described in claim 1, characterized in that: The dust removal assembly includes a gravity dust collector and a bag filter connected in series.

3. The fine desulfurization system for blast furnace gas as described in claim 2, characterized in that: A chlorine powder spraying pipe section is connected in series between the gravity dust collector and the bag dust collector.

4. The fine desulfurization system for blast furnace gas as described in claim 3, characterized in that: The fine desulfurization system also includes a dechlorination powder preparation device. A connecting section is provided between the dechlorination powder preparation device and the chlorination powder spraying pipe section. The connecting section is equipped with a dechlorination powder nozzle, a dechlorination powder check valve, and a dechlorination powder safety valve.

5. The fine desulfurization system for blast furnace gas as described in claim 4, characterized in that: The dechlorination powder preparation device is provided in two sets.

6. The fine desulfurization system for blast furnace gas as described in claim 1, characterized in that: The hydrolysis assembly is equipped with a vent pipe, and the vent pipe is equipped with a vent shut-off valve and a vent safety valve.

7. The fine desulfurization system for blast furnace gas as described in claim 1, characterized in that: The first control valve group includes a temperature-regulating pre-shut-off valve and a temperature-regulating pre-spectacle valve, which are respectively arranged between the temperature regulating assembly and the dust removal assembly.

8. The fine desulfurization system for blast furnace gas as described in claim 1, characterized in that: The second control valve group includes a bypass regulating valve and a bypass safety valve, which are arranged in parallel on the second branch pipe.

9. The fine desulfurization system for blast furnace gas as described in claim 1, characterized in that: The first branch is equipped with a filter bypass control valve arranged in parallel with the first filter.

10. The fine desulfurization system for blast furnace gas as described in claim 1, characterized in that: The first branch is also equipped with a post-filter spectacle valve and a filter shut-off valve, which are arranged in series on the side of the first filter away from the hydrolysis component.

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