A device and system for improving dust removal efficiency at blast furnace tapping nozzles.

Abstract

This utility model relates to the field of thermal energy conservation technology, and provides a device and system for improving the dust removal efficiency of blast furnace tapping nozzles. One device for improving the dust removal efficiency of blast furnace tapping nozzles includes a gas-blocking enclosure and a gas-blocking baffle. When the gas-blocking enclosure is installed on the lower edge of the blast furnace platform, it surrounds the first and second molten iron flow isolators and is located between the lower edge of the blast furnace platform and the first molten iron ladle, and between the lower edge of the blast furnace platform and the second molten iron ladle. The gas-blocking baffle is located between the first and second molten iron ladles. A system for improving the dust removal efficiency of blast furnace tapping nozzles is also disclosed, utilizing the aforementioned device for improving the dust removal efficiency of blast furnace tapping nozzles. This utility model transforms a previously open space into a controlled closed space, blocking both the airflow path and the intake path of non-dust airflow.

Description

Technical Field

[0001] This utility model relates to the field of thermal energy conservation technology, and more specifically, to a device and system that can improve the dust removal efficiency of blast furnace tapping nozzles. Background Technology

[0002] Dust and slag are generated at every stage of blast furnace tapping, with the most severe dust and slag generation occurring below the swing chute. During tapping, molten iron is poured into the left and right ladles parked side by side on the left and right railway tracks below the blast furnace platform via the swing chute. The pouring of molten iron and the strong impact between the molten iron and the swing chute and ladles result in severe dust and slag generation, creating an extremely harsh environment. Currently, dust and slag are extracted from the vicinity of the ladles by installing dust extraction vents on both sides of the swing chute.

[0003] Below the swing chute are the molten iron ladle, railway, and passageway. To ensure the safe passage of the molten iron ladle, the passageway needs to be designed to be wide and well-ventilated (tunnel span is 11.4 meters). The lower edge of the blast furnace platform is at an elevation of 7.30 meters, the swing chute opening is 1.10 meters higher than the lower edge of the blast furnace platform, the ladle opening is at an elevation of 4.9 meters, and the ladle bottom is at an elevation of 0.9 meters. During tapping, 3.5 meters of molten iron is exposed to the natural environment. In addition to high-temperature heat radiation, convective heat loss is significant, with a general conclusion of 50-80℃ temperature loss, accounting for 27%-43% of the total temperature loss at the steel interface. Because the dust suction port is far from the ladle opening and the space below is completely open, the dust generated from below the swing chute to the ladle only surrounds the molten iron. The dust suction port is not targeted, resulting in a large amount of dust-free fresh air being drawn in through the dust suction port, diverting the capacity of the dust removal fan. On the other hand, since the flue gas during the molten iron flow is collected in an open space, the power of the dust removal fan is often continuously increased during production to achieve the dust removal effect, but the effect is not significant. This results in the dust removal fan having excessive capacity, but the actual dust extraction efficiency is not high. At the same time, the increased airflow and the reverse impact of the molten iron cause small pieces of slag and iron on the periphery of the molten iron stream to be thrown out, deviating from the trajectory and splashing in all directions. A large proportion of dust and slag and iron still overflows, making it appear as if the molten iron stream is forked and slag and iron are splashing. This worsens the environment under the blast furnace tapping area. Moreover, due to the increased air volume, the upward airflow formed by the dust removal suction port above envelops the entire molten iron, increasing the heat loss of the molten iron due to counter-current convection, resulting in a severe drop in the temperature of the molten iron and increasing the cooling of the molten iron.

[0004] With increasingly stringent requirements for energy conservation, emission reduction, and environmental protection, the insulation and dust removal measures during blast furnace tapping have become more comprehensive and meticulous, and the power of dust removal fans has continued to increase. To address the issue of low-target dust removal between the swivel tap and the molten iron ladle, domestic research has been ongoing for decades, resulting in several proposed solutions. However, these solutions have generally not been truly implemented or applied due to their limited practicality. Utility Model Content

[0005] In view of the above-mentioned technical problems, an apparatus and system are provided to improve the dust removal efficiency of blast furnace tapping nozzles.

[0006] The technical means adopted in this utility model are as follows:

[0007] In a first aspect, a device for improving the dust removal efficiency of blast furnace tapping nozzles includes a gas baffle and a gas baffle plate; the gas baffle is a cylindrical structure with the axial direction and vertical direction aligned and is detachably installed on the lower edge of the blast furnace platform, and the gas baffle plate is vertically and fixedly installed inside the gas baffle; when the gas baffle is installed on the lower edge of the blast furnace platform, the gas baffle surrounds the first and second molten iron flow isolators and is located between the lower edge of the blast furnace platform and the first molten iron ladle and between the lower edge of the blast furnace platform and the second molten iron ladle, and the gas baffle plate is located between the first and second molten iron ladles.

[0008] Furthermore, it also includes several support rods; the several support rods are evenly distributed and fixedly installed inside the gas barrier panel.

[0009] Furthermore, it also includes several hooks; the several hooks are evenly distributed and fixedly installed on several support rods, and the several hooks can be detachably installed on the lower edge of the blast furnace platform.

[0010] Secondly, a system for improving the dust removal efficiency of a blast furnace tapping spout includes a first sidewall, a second sidewall, a first railway, a second railway, a first molten iron ladle, a second molten iron ladle, a blast furnace platform, a swinging spout, a first molten iron flow isolator, a second molten iron flow isolator, and a dust removal system; both the first and second sidewalls extend in a front-rear direction; both the first and second railways extend in a front-rear direction and are respectively fixedly installed on the left and right sides between the first and second sidewalls; the first and second molten iron ladles are respectively located on the first and second railways; the blast furnace platform has mounting holes along the vertical direction, and the blast furnace platform is located directly above the first and second molten iron ladles; the swinging spout is rotatably installed in the mounting holes; the first... The molten iron flow isolator and the second molten iron flow isolator are respectively located below the left and right ends of the swing tapping spout and directly above the first and second molten iron ladles; it also includes a device for improving the dust removal efficiency of the blast furnace tapping spout as described in any one of the first aspects; several hooks in the device for improving the dust removal efficiency of the blast furnace tapping spout are all installed on the lower edge of the blast furnace platform; the gas baffle in the device for improving the dust removal efficiency of the blast furnace tapping spout surrounds the first and second molten iron flow isolators and is located between the lower edge of the blast furnace platform and the first molten iron ladle and between the lower edge of the blast furnace platform and the second molten iron ladle; the gas baffle in the device for improving the dust removal efficiency of the blast furnace tapping spout is located between the first and second molten iron ladles.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] 1. This utility model provides a device and system for improving the dust removal efficiency of the blast furnace tapping nozzle. By utilizing gas-blocking panels and baffles installed along the lower edge of the blast furnace platform, the originally open space is transformed into a controlled, enclosed space, blocking both the airflow path and the intake path of non-dust-laden airflow. This achieves three main benefits: first, it reduces the diffusion rate of blast furnace dust, increasing the capture rate of the dust removal fan; second, it reduces the amount of ineffective cold air intake by the fan, thus improving dust removal efficiency and reducing temperature loss from the molten iron; and third, it prevents blast furnace splashes from injuring personnel and equipment around the furnace.

[0013] 2. In this utility model, the gas blocking plate is supported by several support rods, making the utility model more stable.

[0014] 3. In this utility model, the gas blocking plate is installed on the lower edge of the blast furnace platform by a number of hooks, so as to realize the detachable installation of this utility model. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is an overall structural diagram of a device for improving the dust removal efficiency of blast furnace tapping nozzles according to the present invention.

[0017] Figure 2 This is an overall structural diagram of a system for improving the dust removal efficiency of blast furnace tapping nozzles according to the present invention.

[0018] Figure 3 This is a front view of a system for improving the dust removal efficiency of blast furnace tapping nozzles according to the present invention.

[0019] Reference numerals in the attached drawings: 1-Gas barrier plate; 2-Hook; 3-Support rod; 4-Gas barrier baffle; 5-Swinging spout; 6-First side wall; 7-Second side wall; 8-First molten iron ladle; 9-Second molten iron ladle; 10-First railway; 11-Second railway; 12-First molten iron flow isolator; 13-Second molten iron flow isolator. Detailed Implementation

[0020] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0024] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0025] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0026] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0027] Example 1:

[0028] like Figure 1 As shown, a device for improving the dust removal efficiency of blast furnace tapping nozzles includes a gas baffle plate 1 and a gas baffle plate 4. The gas baffle plate 1 is a cylindrical structure with the axial direction and vertical direction aligned and is detachably installed on the lower edge of the blast furnace platform. The gas baffle plate 4 is vertically installed and fixedly installed inside the gas baffle plate 1. When the gas baffle plate 1 is installed on the lower edge of the blast furnace platform, the gas baffle plate 1 surrounds the first molten iron flow isolator 12 and the second molten iron flow isolator 13 and is located between the lower edge of the blast furnace platform and the first molten iron ladle 8 and between the lower edge of the blast furnace platform and the second molten iron ladle 9. The gas baffle plate 4 is located between the first molten iron ladle 8 and the second molten iron ladle 9.

[0029] In this embodiment, a plurality of support rods 3 are also included; the plurality of support rods 3 are evenly distributed and fixedly installed inside the gas barrier panel 1.

[0030] Specifically, there are four support rods 3, all of which extend in the front-back direction. Two support rods 3 are located on the left and right sides of the first molten iron ladle 8, and the other two support rods 3 are located on the left and right sides of the second molten iron ladle 9.

[0031] In this embodiment, a plurality of hooks 2 are also included; the plurality of hooks 2 are evenly distributed and fixedly installed on a plurality of support rods 3, and the plurality of hooks 2 are detachably installed on the lower edge of the blast furnace platform.

[0032] Specifically, there are twelve hooks 2, with two hooks 2 fixedly installed on each support rod 3, and the remaining four hooks 2 fixedly installed on the gas barrier plate 1.

[0033] Example 2:

[0034] like Figures 1 to 3 As shown, a system for improving the dust removal efficiency of blast furnace tapping nozzles includes a first sidewall 6, a second sidewall 7, a first railway 10, a second railway 11, a first molten iron ladle 8, a second molten iron ladle 9, a blast furnace platform, a swing tapping nozzle 5, a first molten iron flow isolator 12, a second molten iron flow isolator 13, and a dust removal system. The first sidewall 6 and the second sidewall 7 both extend in a front-to-back direction. The first railway 10 and the second railway 11 both extend in a front-to-back direction and are respectively fixedly installed on the left and right sides between the first sidewall 6 and the second sidewall 7. The first molten iron ladle 8 and the second molten iron ladle 9 are respectively located on the first railway 10 and the second railway 11. The blast furnace platform has mounting holes along the vertical direction, and the blast furnace platform is located directly above the first molten iron ladle 8 and the second molten iron ladle 9. The swing tapping nozzle 5 is rotatably installed within the mounting holes. The first molten iron flow isolator 12 and the second molten iron flow isolator 13 are respectively located below the left and right ends of the swing tap 5 and directly above the first molten iron ladle 8 and the second molten iron ladle 9; it also includes a device for improving the dust removal efficiency of the blast furnace tapping nozzle as described in any one of Embodiment 1; several hooks 2 in the device for improving the dust removal efficiency of the blast furnace tapping nozzle are all installed on the lower edge of the blast furnace platform; the gas blocking plate 1 in the device for improving the dust removal efficiency of the blast furnace tapping nozzle surrounds the first molten iron flow isolator 12 and the second molten iron flow isolator 13 and is located between the lower edge of the blast furnace platform and the first molten iron ladle 8 and between the lower edge of the blast furnace platform and the second molten iron ladle 9; the gas blocking baffle 4 in the device for improving the dust removal efficiency of the blast furnace tapping nozzle is located between the first molten iron ladle 8 and the second molten iron ladle 9.

[0035] Specifically, the lower edge of the gas barrier panel 1 extends 150mm above the tank edge; the structural dimensions (length × width × height) of the gas barrier partition 4 are less than 1430 × 820 × 2500mm; the wall thickness of the gas barrier panel 1 is 50mm; the gas barrier panel 1 adopts a composite insulation structure (steel shell plus high-temperature resistant insulation cotton); the collected flue gas temperature is 80℃; the device dimensions (length × width × height) of the gas barrier panel 1 are 9000 × 4000 × 600mm; the single weight of the gas barrier panel 1 is 3.7t; the outdoor summer ventilation calculation temperature is 28.2℃, and the wind speed is 2.7m / s; the outdoor winter ventilation calculation temperature is -8.6℃, and the wind speed is 2.9m / s; it has the ability to resist the effects of harsh environments such as high-temperature radiation, splashing erosion, high-temperature baking, and metal dust from molten iron; the structural material selection is: environmental category, durability design: reinforced concrete. The thickness of the main reinforcement protective layer is as follows: 20mm for beams and columns, 15mm for cast-in-place slabs and walls; the thickness of the main reinforcement protective layer in the foundation is ≥40mm; Concrete: C30 or C35 waterproof concrete with a permeability grade of P6-P8 is used for the modification of reinforced concrete equipment foundations; GJ micro-expansion grout or C40 micro-expansion concrete is used for secondary grouting material for post-anchoring; Reinforcing steel: HPB300 and HRB400 grade reinforcing steel are used; Steel structure: Q235-B steel components are used, and the surface grade of the load-bearing steel components is Sa2.5; Coating: Heat-resistant and anti-corrosion coating is used when there is radiant heat, and general anti-corrosion coating is used when there is no radiant heat; Effect: The structural dimensions and installation parameters of the device meet the passage conditions of locomotives and tank cars in the production site; During the tapping process, the method of improving the dust removal efficiency of the blast furnace tapping nozzle is used to increase the molten iron temperature by 5.5℃, while reducing slag and iron splashing during the tapping process and improving the production environment of the blast furnace tapping area.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model 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 this utility model.

Claims

1. A device for improving the dust removal efficiency of a blast furnace tapping stream nozzle, characterized in that, Includes a gas barrier panel (1) and a gas barrier partition (4); The gas barrier plate (1) is a cylindrical structure with the axial direction and the vertical direction aligned and is detachably installed on the lower edge of the blast furnace platform. The gas barrier partition (4) is vertical and fixedly installed inside the gas barrier plate (1). When the gas barrier plate (1) is installed on the lower edge of the blast furnace platform, the gas barrier plate (1) surrounds the first molten iron flow isolator (12) and the second molten iron flow isolator (13) and is located between the lower edge of the blast furnace platform and the first molten iron ladle (8) and between the lower edge of the blast furnace platform and the second molten iron ladle (9). The gas barrier plate (4) is located between the first molten iron ladle (8) and the second molten iron ladle (9).

2. The device of claim 1, wherein, It also includes several support rods (3); The plurality of support rods (3) are evenly distributed and fixedly installed inside the gas barrier panel (1).

3. The device of claim 2, wherein, It also includes several hooks (2); The plurality of hooks (2) are evenly distributed and fixedly installed on the plurality of support rods (3), and the plurality of hooks (2) can be detachably installed on the lower edge of the blast furnace platform.

4. A system for improving the dust removal efficiency of blast furnace tapping spouts, comprising a first side wall (6), a second side wall (7), a first railway (10), a second railway (11), a first molten iron ladle (8), a second molten iron ladle (9), a blast furnace platform, a swinging tapping spout (5), a first molten iron flow isolator (12), a second molten iron flow isolator (13), and a dust removal system; The first side wall (6) and the second side wall (7) both extend in the front-back direction; The first railway (10) and the second railway (11) both extend in the front-back direction and are fixedly installed on the left and right sides between the first side wall (6) and the second side wall (7); The first molten iron ladle (8) and the second molten iron ladle (9) are located on the first railway (10) and the second railway (11), respectively; The blast furnace platform is provided with mounting holes along the vertical direction, and the blast furnace platform is located directly above the first molten iron ladle (8) and the second molten iron ladle (9); The swing nozzle (5) is rotatably installed in the mounting hole; The first molten iron flow isolator (12) and the second molten iron flow isolator (13) are located below the left and right ends of the swing spout (5) and directly above the first molten iron ladle (8) and the second molten iron ladle (9), respectively. characterized in that It also includes a device for improving the dust removal efficiency of the blast furnace tapping nozzle as described in any one of claims 1 to 3; Several hooks (2) in the device that can improve the dust removal efficiency of the blast furnace tapping nozzle are all installed on the lower edge of the blast furnace platform; The gas baffle (1) in the device that can improve the dust removal efficiency of the blast furnace tapping nozzle surrounds the first molten iron flow isolator (12) and the second molten iron flow isolator (13) and is located between the lower edge of the blast furnace platform and the first molten iron ladle (8) and between the lower edge of the blast furnace platform and the second molten iron ladle (9). The gas baffle (4) in the device that can improve the dust removal efficiency of the blast furnace tapping nozzle is located between the first molten iron ladle (8) and the second molten iron ladle (9).

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