Method and device for temporarily guiding and releasing local gas leakage

Abstract

The invention discloses a method and a device for temporarily guiding and releasing local gas leakage, which are characterized in that a conical collecting cover and a guiding pipeline are combined, negative pressure is formed in the guiding pipeline by utilizing a chimney effect, active pumping and directional transfer of leaked gas are realized, local gathering of the gas in a platform area near a gas leakage point is avoided, and the leakage of the leaked gas is avoided. The gas concentration in an operation environment is reduced, the safety of field operation is remarkably improved, and poisoning and explosion risks are effectively prevented. The large-opening end of the conical collecting cover can fully cover a gas leakage point, and a gap between the conical collecting cover and the gas leakage point is blocked by matching with a sealing material, so that gas escaping from the edge of a cover body of the conical collecting cover can be greatly reduced. Meanwhile, complex power equipment or high investment is not needed, used materials are simple and easy, the cost is low, manufacturing and mounting are flexible and rapid, the method is suitable for the emergency situation that the blast furnace cannot be shut down for overhauling in the production process, and temporary control over gas leakage points can be achieved on the premise that normal production of the blast furnace is not affected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel metallurgy, and particularly relates to a method for temporarily leading away and diffusing local coal gas leakage and a leading-away and diffusing device. BACKGROUND

[0002] In the steel metallurgy production process, a blast furnace is one of core equipment. With the blast furnace service entering the later period, a local jet-type coal gas leakage point 3 is prone to occur at a blast furnace base 1 or a blast furnace body 2. Since the blast furnace body is always in a high-temperature and high-pressure working condition, the external coal gas leakage point cannot be effectively plugged online in the normal production state.

[0003] The un-plugged coal gas leakage point will cause continuous leakage of the coal gas, and the leaked coal gas is prone to be gathered between various layers of platforms of the blast furnace, such as Figure 1 As shown in the environmental schematic diagram of the coal gas leakage, it can be seen that the coal gas overflowed from the coal gas leakage point diffuses and gathers in the platform area (such as a blast furnace bottom water-cooled pipe platform 4). The coal gas gathering will seriously exceed the standard of the coal gas concentration in the platform area, which on one hand greatly increases the environmental safety risk of the operation site, and on the other hand, if the coal gas leakage cannot be controlled, when the leakage concentration reaches a certain degree or the continuous leakage affects the normal operation of the equipment, the blast furnace will be passively stopped for production and maintenance, which seriously affects the continuity of the steel production and causes huge economic losses. SUMMARY

[0004] In order to overcome the above-mentioned defects of the prior art, the present application provides a method for temporarily leading away and diffusing local coal gas leakage and a leading-away and diffusing device, which aims to solve the problems of high safety risk caused by continuous leakage of the coal gas and passive stop of the blast furnace for maintenance.

[0005] The technical scheme adopted by the present application to solve the technical problems is as follows: a method for temporarily leading away and diffusing local coal gas leakage, comprising the following steps: identifying a coal gas leakage point of a blast furnace base or a blast furnace body; preparing a leading-away and diffusing device, the leading-away and diffusing device comprising a conical collecting cover and a leading-away pipeline, the leading-away pipeline being connected with a small-end of the conical collecting cover; covering a large-end of the conical collecting cover on the coal gas leakage point, and plugging a gap between the conical collecting cover and the coal gas leakage point by using a sealing material; leading an outlet end of the leading-away pipeline to a high and open safety area; forming a negative pressure in the leading-away pipeline of the leading-away and diffusing device by using a chimney effect, and leading the leaked coal gas to the high and open safety area for diffusion.

[0006] As a further improvement of the present application: the lead-out pipeline comprises an iron pipe and a flexible connecting pipe, one end of the iron pipe is connected with the small end of the conical collecting cover, the other end of the iron pipe is connected with the flexible connecting pipe, and the outlet end of the flexible connecting pipe leads to a high and open safe area. The lead-out pipeline adopts a combined design of iron pipe and flexible connecting pipe, which takes into account the rigid support of the structure and the flexible layout of the pipeline, ensures the stability of the initial section, optimizes the terminal diffusion path, and realizes the convenience of installation and the economy of layout in a soft and hard way, ensuring safety and reliability. The iron pipe as the starting section of the connection system has sufficient structural strength and high temperature resistance, can be reliably fixed on the conical collecting cover, can withstand the high temperature and airflow impact near the gas leakage point, provides a stable anchor point for the lead-out diffusion device, and prevents displacement or sealing failure of the conical collecting cover due to the weight of the pipeline or accidental collision. Secondly, the introduction of the flexible connecting pipe greatly improves the adaptability of the entire lead-out diffusion device. The environment of the blast furnace platform site is complex, and is full of various equipment and structural members. The iron pipe is difficult to bend and lay for a long distance. The flexible connecting pipe can easily bypass these obstacles, realize flexible and rapid path planning and laying, and ensure that the gas can be finally led to the ideal high and open safe area.

[0007] As a further improvement of the present application: the sealing material is a viscous material. By using a viscous material as the sealing material, efficient plugging of irregular leakage points can be quickly achieved. The viscous material has good plasticity and adhesion, can tightly fill various irregular gaps that may exist between the conical collecting cover and the blast furnace base or the blast furnace body, form an effective sealing layer, prevent gas leakage, and ensure that the leaked gas is completely introduced into the lead-out pipeline, greatly improving the reliability and construction efficiency of temporary sealing, and the operation is simple. It can quickly establish a safe condition in a dangerous environment.

[0008] As a further improvement of the present application: the sealing material is a watered mortar. By using watered mortar as the sealing material, watered mortar is a common and easily available refractory material in the metallurgical industry, which has excellent plasticity and high temperature resistance. The watered mortar can tightly fit the irregular surface between the blast furnace base or the blast furnace body and the conical collecting cover, quickly form an effective seal, and ensure that the leaked gas is completely introduced into the pipeline. The refractory properties of watered mortar enable it to maintain structural stability and sealing performance in the high temperature environment of the blast furnace shell, and will not fail or burn due to high temperature, greatly improving the reliability and safety of temporary sealing.

[0009] As a further improvement of the present application: the iron pipe and the flexible connecting pipe are fastened by a pipe clamp. The iron pipe and the flexible connecting pipe are fastened by a pipe clamp, which has the advantages of simple and fast operation, and can be firmly locked by using common tools such as wrenches, which is suitable for the needs of on-site quick installation. The pipe clamp can provide uniform circumferential fastening force to ensure that the connection between the iron pipe and the flexible connecting pipe is tight and reliable, effectively preventing the interface from loosening or falling off due to internal gas pressure or external pulling, and significantly improving the air tightness and safety of the entire lead-off dispersion device. The mechanical connection method using a pipe clamp has the advantages of stability and durability, and is convenient for disassembly and adjustment when necessary.

[0010] As a further improvement of the present application: the flexible connecting pipe is a skin pipe.

[0011] The skin pipe is used as the flexible connecting pipe, which has good flexibility and certain pressure resistance, can easily bypass obstacles on the platform, realize flexible and fast pipe laying, and greatly improve the convenience of installation and adaptability to complex site environment. The inner wall of the skin pipe is relatively smooth, and has small resistance to fluid, which is beneficial to smooth gas transportation.

[0012] As a further improvement of the present application: the lead-off dispersion device further comprises a ball valve for controlling the flow of gas, and the ball valve is arranged on the iron pipe. The ball valve is arranged on the iron pipe as a gas flow control component. First, the ball valve is quick to open and close, and easy to operate, only needs to be rotated by 90 degrees to achieve full opening or full closing, which is convenient for quickly establishing or cutting off the lead-off dispersion path in the case of gas leakage, greatly improving the emergency response efficiency and operation safety. Second, the ball valve has excellent sealing performance and low flow resistance, can ensure smooth gas passage when fully open, and effectively utilize the chimney effect. By adjusting the opening degree of the ball valve, the flow of lead-off gas can be accurately controlled, and active and controllable management of the leakage gas discharge process is realized.

[0013] As a further improvement of the present application: the high open safety area is an area outside the blast furnace platform, which ensures that the gas diffusion does not affect the safety of operation. By specifying the high open safety area as an area outside the blast furnace platform, the safety space between the hazard source and the operation area can be isolated, ensuring that the lead-off gas is eventually dispersed and naturally diffused in an area far away from the personnel operating position, effectively preventing the backflow or re-aggregation of toxic and harmful gases on the operation platform, completely avoiding secondary safety risks during treatment, protecting the life safety of platform operation personnel, and enabling subsequent monitoring and emergency disposal of the gas leakage point to be carried out in a relatively safe environment.

[0014] As a further improvement to the present invention, the following steps are also included: after sealing the gap between the conical collection hood and the gas leak point with sealing material, the sealing performance is checked to ensure that no gas leaks out from the gap. By adding the step of checking the sealing performance, quality control awareness is integrated into the operation process, significantly improving the reliability of the entire method for temporary diversion and venting of gas leaks. By actively verifying the sealing effect, initial sealing defects caused by uneven contact surfaces or inadequate material filling can be detected and remedied in a timely manner, fundamentally eliminating the risk of gas leaking out from the edge of the conical collection hood, ensuring that leaked gas is completely guided to the preset safe venting path, and avoiding the local accumulation of hazardous gases in the work area, thus preventing secondary pollution.

[0015] This invention also provides a gas extraction and venting device for implementing the aforementioned method of temporary extraction and venting of localized gas leaks, comprising: a conical collection hood for covering the gas leak point; an extraction pipe connected to the conical collection hood; a ball valve disposed on the extraction pipe for controlling the gas flow rate; and sealing material for sealing the gap between the conical collection hood and the gas leak point. The extraction and venting device integrates key functional components such as the conical collection hood, extraction pipe, ball valve, and sealing material, forming a complete, efficient, and safe temporary treatment system. First, the conical collection hood effectively captures the leaking gas at its source; its conical design facilitates covering irregular leak points and reduces gas inflow resistance. The extraction pipe, as a transport channel, undertakes the mission of safely transferring hazardous gases. The introduction of the ball valve is a crucial safety and control design, enabling operators to flexibly adjust or even quickly cut off the gas flow according to the gas leak volume, greatly improving the controllability of the entire process. The sealing material ensures the airtightness of the collection process, guaranteeing that all gas is drawn into the extraction and venting device rather than escape into the environment. Secondly, the evacuation and release device has a high degree of functional integration and ease of operation. It integrates the four major functions of collection, control, transportation and sealing into a compact system. The components are all made of common industrial materials, which are low in manufacturing and acquisition costs. It can be quickly assembled and deployed on site, making it suitable for emergency use.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This invention cleverly utilizes the chimney effect to create negative pressure within the extraction pipe by combining a conical collection hood and an extraction pipe. This achieves active extraction and directional transfer of leaked gas, directly preventing localized gas accumulation in the platform area near the leak point. This fundamentally reduces the gas concentration in the working environment, significantly improving on-site safety and effectively preventing poisoning and explosion risks. Secondly, the large opening of the conical collection hood completely covers the gas leak point. Combined with sealing materials to plug the gap between the conical collection hood and the leak point, this greatly reduces gas escape from the edge of the hood, offering excellent gas collection and sealing effects. Furthermore, this invention requires no complex power equipment or high investment. The materials used are simple and low-cost, and the manufacturing and installation are flexible and quick. It is suitable for emergency situations where blast furnace production cannot be shut down for maintenance, enabling temporary control of gas leaks without affecting normal blast furnace production, thus avoiding significant economic losses caused by unplanned shutdowns. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the environment where a gas leak occurred.

[0019] Figure 2 This is a flowchart of a method for temporarily diverting and releasing localized gas leaks according to the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of a gas evacuation and release device for implementing the method of temporary evacuation and release of a local gas leak according to the present invention.

[0021] Attached reference numerals: 1. Blast furnace base; 2. Blast furnace body; 3. Gas leak point; 4. Bottom water-cooled pipe platform; 5. Conical collection hood; 6. Iron pipe; 7. Ball valve; 8. Flexible connecting pipe; 9. Sealing material. Detailed Implementation

[0022] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0026] The present invention will now be further described in conjunction with the accompanying drawings and embodiments:

[0027] Please see Figure 2 One embodiment of the present invention provides a method for temporarily diverting and releasing a localized gas leak, comprising the following steps:

[0028] Identify the gas leak point 3 in the blast furnace base 1 or the blast furnace body 2;

[0029] Prepare a dispersion and release device, which includes a conical collection hood 5 and a dispersion pipe, wherein the dispersion pipe is connected to the small end of the conical collection hood 5;

[0030] Cover the gas leak point 3 with the large opening of the conical collection hood 5, and seal the gap between the conical collection hood 5 and the gas leak point 3 with sealing material 9.

[0031] The outlet end of the diversion pipeline should be moved to a high, open, and safe area.

[0032] By utilizing the chimney effect, a negative pressure is created in the venting pipe of the venting device, which draws the leaked gas to a high, open, and safe area for venting.

[0033] By combining the conical collection hood 5 and the extraction pipe, the chimney effect is cleverly utilized to create negative pressure in the extraction pipe, thereby achieving active extraction and directional transfer of leaked gas. This directly avoids the local accumulation of gas in the platform area near the gas leak point 3, fundamentally reducing the gas concentration in the working environment, significantly improving the safety of on-site operations, and effectively preventing the risk of poisoning and explosion.

[0034] Secondly, the large opening of the conical collection hood 5 can completely cover the gas leak point 3. Combined with the sealing material 9 to seal the gap between the conical collection hood 5 and the gas leak point 3, it can significantly reduce the escape of gas from the edge of the conical collection hood 5, and has the advantages of good gas collection and sealing effect.

[0035] Meanwhile, this invention does not require complex power equipment or high investment, uses simple and low-cost materials, and is flexible and quick to manufacture and install. It is suitable for emergency situations in which the blast furnace cannot be shut down for maintenance during production. It can achieve temporary control of gas leak point 3 without affecting the normal production of the blast furnace, thus avoiding huge economic losses caused by unplanned shutdowns.

[0036] In some embodiments, the diversion conduit includes an iron pipe 6 and a flexible connecting pipe 8. One end of the iron pipe 6 is connected to the small end of the conical collection hood 5, and the other end of the iron pipe 6 is connected to the flexible connecting pipe 8. The outlet end of the flexible connecting pipe 8 is led to a high, open, and safe area.

[0037] The evacuation pipeline adopts a combined design of iron pipe 6 and flexible connecting pipe 8, which takes into account the rigid support of the structure and the flexibility of the pipeline layout. It ensures the stability of the initial section as a premise and aims to optimize the terminal venting path. With a combination of rigidity and flexibility, it ensures safety and reliability while achieving convenient installation and economical layout, and has strong engineering practicality.

[0038] As the starting section of the connection system, the iron pipe 6 has sufficient structural strength and high temperature resistance, and can be reliably fixed on the conical collection hood 5. It can withstand the high temperature and airflow impact that may exist near the gas leak point 3, provide a stable anchor point for the evacuation and venting device, and prevent the conical collection hood 5 from shifting or failing to seal due to the weight of the pipe or accidental collision.

[0039] Secondly, the introduction of the flexible connecting pipe 8 greatly enhances the adaptability of the entire gas venting device. The blast furnace platform has a complex environment, filled with various equipment and structural components, making it difficult to lay the iron pipe 6 over long distances with bends. The flexible connecting pipe 8 can easily bypass these obstacles, enabling flexible and rapid path planning and laying, ensuring that the gas is ultimately led to the most ideal high-altitude, open, and safe area, without being restricted by fixed lines. This not only simplifies installation and reduces construction difficulty but also optimizes the venting effect. In addition, the flexible connecting pipe 8 can absorb and compensate for slight vibrations or thermal expansion and contraction that may occur in the gas venting device, avoiding the risk of loosening or cracking of joints caused by stress concentration in purely rigid long pipes. This ensures the continuity and sealing of the gas venting process and prevents secondary leaks.

[0040] In some embodiments, the sealing material 9 is an adhesive material.

[0041] By using an adhesive material as the sealing material 9, it is possible to quickly and efficiently seal irregular leak points. The adhesive material has good plasticity and adhesion, which can tightly fill various irregular gaps that may exist between the conical collection hood 5 and the blast furnace base 1 or the blast furnace body 2, forming an effective sealing layer to prevent gas leakage and ensure that the leaked gas is completely guided into the evacuation pipeline. This greatly improves the reliability and construction efficiency of the temporary seal, is easy to operate, and can quickly establish safe conditions in hazardous environments, making it highly practical.

[0042] In some embodiments, the sealing material 9 is water-based clay.

[0043] By using water-based gun clay as the sealing material 9, water-based gun clay, a common and readily available refractory material in the metallurgical industry, possesses excellent plasticity and high-temperature resistance. The water-based gun clay can tightly adhere to the irregular surface between the blast furnace base 1 or blast furnace body 2 and the conical collection hood 5, quickly forming an effective seal and ensuring that leaked gas is completely diverted into the pipeline. Water-based gun clay is inexpensive and easy to use, making it suitable for emergency temporary treatment applications. More importantly, the refractory properties of water-based gun clay enable it to maintain structural stability and sealing performance in the high-temperature environment of the blast furnace shell, preventing failure or combustion due to high temperatures, greatly improving the reliability and safety of temporary seals.

[0044] In some embodiments, the iron pipe 6 and the flexible connecting pipe 8 are fastened together by pipe clamps.

[0045] The iron pipe 6 and the flexible connecting pipe 8 are fastened together using pipe clamps. This method is simple and quick to operate, requiring only common tools such as wrenches to achieve a secure tightening, making it suitable for rapid on-site installation. The pipe clamps provide a uniform circumferential tightening force, ensuring a tight and reliable connection between the iron pipe 6 and the flexible connecting pipe 8. This effectively prevents loosening or detachment of the joint due to internal gas pressure or external tension, significantly improving the airtightness and safety of the entire gas evacuation and venting device. The mechanical connection method using pipe clamps is robust and durable, and facilitates disassembly and adjustment when necessary, offering low cost and high reliability.

[0046] In some embodiments, the flexible connecting tube 8 is a tubing.

[0047] By using tubing as the flexible connecting pipe 8, the tubing possesses good flexibility and a certain pressure resistance, easily bypassing obstacles on the platform to achieve flexible and rapid pipe laying, greatly improving the convenience of installation and adaptability to complex site environments. The relatively smooth inner wall of the tubing reduces fluid resistance, which is beneficial for the smooth transportation of gas. At the same time, as a common industrial material, tubing has the advantages of low cost, easy availability and replacement, making it suitable for temporary safety measures and highly convenient.

[0048] In some embodiments, the evacuation and venting device further includes a ball valve 7 for controlling the flow rate of the gas stream, the ball valve 7 being disposed on the iron pipe 6.

[0049] A ball valve 7 is installed on the iron pipe 6 as a gas flow control component. First, the ball valve 7 opens and closes quickly and is easy to operate; a mere 90-degree rotation is sufficient to achieve full opening or full closing. This facilitates the rapid establishment or disconnection of the evacuation and venting path in the event of a sudden gas leak, greatly improving emergency response efficiency and operational safety. Second, the ball valve 7 has excellent sealing performance and low flow resistance. When fully open, it ensures smooth gas flow, effectively utilizing the chimney effect. Furthermore, by adjusting the opening degree of the ball valve 7, the evacuated gas flow rate can be precisely controlled, enabling proactive and controllable management of the leaked gas emission process and enhancing the reliability and safety of the entire evacuation and venting device.

[0050] In some implementations, the elevated open safety area is the area outside the blast furnace platform, ensuring that the spread of gas does not affect operational safety.

[0051] By designating the high, open, and safe area outside the blast furnace platform, the hazardous source can be safely isolated from the work area. This ensures that the diverted gas is ultimately released and naturally diffused in an area far from where personnel are operating, effectively preventing the backflow or re-accumulation of toxic and harmful gases on the work platform. This completely avoids secondary safety risks during the treatment process, protects the lives of platform workers, and allows subsequent monitoring and emergency response at gas leak point 3 to be carried out in a relatively safe environment. This greatly improves the safety and reliability of the entire method for temporary diversion and release of gas leaks.

[0052] In some implementations, the following steps are also included:

[0053] After sealing the gap between the conical collection hood 5 and the gas leak point 3 with sealing material 9, check the sealing performance to ensure that no gas leaks out from the gap.

[0054] By adding a step to check the sealing of the plug, quality control is integrated into the operational process, significantly improving the reliability of the entire method for temporary gas leakage diversion and venting. Actively verifying the sealing effect allows for the timely detection and remediation of initial sealing defects caused by uneven contact surfaces or inadequate material filling, fundamentally eliminating the risk of gas overflowing from the edge of the conical collection hood 5. This ensures that leaked gas is completely guided to the pre-set safe venting path, preventing the localized accumulation of hazardous gases in the work area and avoiding secondary pollution. Shifting from reactive remediation to proactive prevention greatly enhances the safety level of this method.

[0055] During operation, due to the high concentration of coal gas in the gas leak area, workers must wear air respirators to enter the gas leak area to ensure operational safety.

[0056] Please see Figure 3 Another embodiment of the present invention provides an isolation and venting device for implementing the aforementioned method for temporary isolation and venting of a local gas leak, comprising:

[0057] Conical collection hood 5, used to cover the gas leak point 3;

[0058] A divergence pipe is connected to a conical collection hood 5;

[0059] Ball valve 7, located on the gas delivery pipeline, is used to control the gas flow rate;

[0060] Sealing material 9 is used to seal the gap between the conical collection hood 5 and the gas leak point 3.

[0061] The gas extraction and venting device in this embodiment integrates key functional components such as a conical collection hood 5, a gas extraction pipeline, a ball valve 7, and sealing material 9, forming a complete, efficient, and safe temporary treatment system. First, the conical collection hood 5 effectively captures leaking gas at its source; its conical design helps to cover irregular leak points and reduce gas inflow resistance. The gas extraction pipeline, as a transport channel, safely transfers the hazardous gas. The introduction of the ball valve 7 is a crucial safety and control design, allowing operators to flexibly adjust or even quickly cut off the gas flow based on the amount of gas leakage, greatly improving the controllability of the entire process. The sealing material 9 ensures the airtightness of the collection stage, guaranteeing that all gas is introduced into the gas extraction and venting device rather than escape into the environment. Second, the gas extraction and venting device features high functional integration and ease of operation. By integrating the four functions of collection, control, transport, and sealing into a compact system, and using common industrial materials, the components are low-cost to manufacture and obtain, allowing for rapid assembly and deployment on-site, making it suitable for emergency use. The venting pipe with ball valve 7 and the conical collection hood 5 perfectly match the core of the method of utilizing the chimney effect and leading to a safe, open area at a high altitude, ensuring that the method of temporarily venting and dispersing local gas leaks of the present invention can be reliably and repeatedly executed.

[0062] The main functions of this invention are:

[0063] This invention cleverly utilizes the chimney effect to create negative pressure within the extraction pipe by combining a conical collection hood and an extraction pipe. This achieves active extraction and directional transfer of leaked gas, directly preventing localized gas accumulation in the platform area near the leak point. This fundamentally reduces the gas concentration in the working environment, significantly improving on-site safety and effectively preventing poisoning and explosion risks. Secondly, the large opening of the conical collection hood completely covers the gas leak point. Combined with sealing materials to plug the gap between the conical collection hood and the leak point, this greatly reduces gas escape from the edge of the hood, offering excellent gas collection and sealing effects. Furthermore, this invention requires no complex power equipment or high investment. The materials used are simple and low-cost, and the manufacturing and installation are flexible and quick. It is suitable for emergency situations where blast furnace production cannot be shut down for maintenance, enabling temporary control of gas leaks without affecting normal blast furnace production, thus avoiding significant economic losses caused by unplanned shutdowns.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A method for temporarily diverting and releasing a localized gas leak, characterized in that: Includes the following steps: Identify gas leak points in the blast furnace base or blast furnace body; Prepare an evacuation and release device, the evacuation and release device comprising a conical collection hood and an evacuation pipe, the evacuation pipe being connected to the small end of the conical collection hood; Cover the gas leak point with the wide end of the conical collection hood, and seal the gap between the conical collection hood and the gas leak point with sealing material; The outlet end of the diversion pipeline should be moved to a high, open, and safe area. By utilizing the chimney effect, a negative pressure is created in the venting pipe of the venting device, which draws the leaked gas to a high, open, and safe area for venting.

2. The method for temporary diversion and venting of localized gas leaks according to claim 1, characterized in that: The diversion pipeline includes an iron pipe and a flexible connecting pipe. One end of the iron pipe is connected to the small end of the conical collection hood, and the other end of the iron pipe is connected to the flexible connecting pipe. The outlet end of the flexible connecting pipe leads to a high, open, and safe area.

3. The method for temporary diversion and venting of localized gas leaks according to claim 1, characterized in that: The sealing material is an adhesive material.

4. The method for temporary diversion and venting of localized gas leaks according to claim 1, characterized in that: The sealing material is water-based potting clay.

5. A method for temporary diversion and venting of localized gas leaks according to claim 2, characterized in that: The iron pipe and the flexible connecting pipe are fastened together by pipe clamps.

6. A method for temporary diversion and venting of localized gas leaks according to claim 2, characterized in that: The flexible connecting tube is a tubing.

7. A method for temporary diversion and venting of localized gas leaks according to claim 2, characterized in that: The evacuation and venting device also includes a ball valve for controlling the flow of coal gas, the ball valve being mounted on the iron pipe.

8. The method for temporary diversion and venting of localized gas leaks according to claim 1, characterized in that: The designated high-altitude open safety area is the area outside the blast furnace platform, ensuring that the spread of gas does not affect operational safety.

9. A method for temporary diversion and venting of localized gas leaks according to claim 1, characterized in that: It also includes the following steps: After sealing the gap between the conical collection hood and the gas leak point with sealing material, check the sealing to ensure that no gas leaks out from the gap.

10. A gas venting device for implementing a method for temporary venting of a localized gas leak as described in any one of claims 1-9, characterized in that, include: A cone-shaped gas collection hood is used to cover gas leaks. A divergence conduit is connected to a conical collection hood; A ball valve, installed on the gas delivery pipeline, is used to control the gas flow rate; Sealing material used to seal the gap between the conical collection hood and the gas leak point.

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