Oven guide pipe device used in blast furnace

Abstract

The utility model discloses an oven guide pipe device used in a blast furnace. The device is characterized in that a hot air ring pipe is horizontally arranged in the furnace and arranged between an air inlet and an iron notch, the top of the hot air ring pipe is connected with the air inlet through hot air input pipes, the hot air input pipes correspond to the air inlets one to one, a plurality of groups of flow guide pipes are arranged on the hot air ring pipe, and the inner diameter of each flow guide pipe is 0.1-0.3 of that of the hot air ring pipe; the flow guide pipe is connected with the side surface of the hot air ring pipe, a flow guide outlet of the flow guide pipe is arranged downwards, is aligned to the inner bottom of the furnace body, is close to the furnace body but is not contacted with the furnace body, the flow guide pipe is divided into an inner ring flow guide pipe and an outer ring flow guide pipe, the flow guide outlet of the inner ring flow guide pipe is arranged on the inner ring of the hot air ring pipe, and the flow guide outlet of the outer ring flow guide pipe is arranged on the outer ring of the hot air ring pipe; iron notch ventilation pipes extending outwards are arranged on the side faces of part of the outer ring flow guide pipes, and the iron notch ventilation pipes are aligned with the iron notches and correspond to the iron notches in a one-to-one mode. The utility model can improve the uniformity of the furnace baking effect and ensure the quality of the blast furnace.

Description

Technical Field

[0001] The utility model relates to the field of metallurgy, in particular to a furnace drying conduit device used in a blast furnace. Background Art

[0002] The lining of the blast furnace contains a lot of water in the refractory materials and mud during the masonry process, and the blast furnace has been in a high-temperature working environment since it was put into production. The blast furnace is a closed container that works at high temperatures for a long time and must maintain a stable temperature as much as possible. In order to make the lining refractory materials adapt to the smelting environment in the blast furnace as soon as possible and play a role in protecting the blast furnace body, the blast furnace must be baked before the blast furnace is ignited to completely remove most of the water on the body, increase its consolidation strength, and enable the blast furnace to be ignited and put into production smoothly.

[0003] Conventional furnace drying ducts are set separately one by one, and each duct is connected to the air inlet of the blast furnace. Hot air enters from one end of the duct and comes out from the other end of the duct to be dispersed in the blast furnace for drying. The hot air enters the blast furnace in a dispersed manner, the temperature is uneven, and the uniformity of the blast furnace baking cannot be guaranteed. Summary of the invention

[0004] The utility model aims to overcome the deficiencies of the prior art and proposes a furnace drying conduit device for the interior of a blast furnace, which can improve the uniformity of the furnace drying effect and ensure the quality of the blast furnace.

[0005] In order to achieve the above objectives, the utility model proposes the following technical solutions:

[0006] A furnace drying duct device for a blast furnace comprises a heat dissipation flow platform and a hot gas duct. A plurality of air inlets are evenly arranged on the upper part of the blast furnace wall, and a plurality of iron openings are evenly arranged on the inner side surface of the bottom of the blast furnace wall. The heat dissipation flow platform is placed above the air inlet. The hot gas duct comprises a hot gas ring pipe, a hot gas input pipe, a guide pipe and a bottom support. The hot gas ring pipe is horizontally arranged in the furnace, and the hot gas ring pipe is placed between the air inlet and the iron opening. The top of the hot gas ring pipe is connected to the air inlet through the hot gas input pipe, and the hot gas input pipe corresponds to the air inlet one by one. A plurality of guide pipes are arranged on the hot gas ring pipe, and the inner diameter of the hot gas ring pipe is larger than the inner diameter of the hot gas input pipe, and the inner diameter of the hot gas input pipe is larger than the inner diameter of the guide pipe, and the inner diameter of the hot gas input pipe is larger than the diameter of the air inlet, and the inner diameter of the guide pipe is 0.1-0.3 of the inner diameter of the hot gas ring pipe.

[0007] The guide pipe is connected to the side of the hot air ring pipe, and the guide outlet of the guide pipe is set downward and aligned with the bottom of the furnace body. The guide outlet is close to the furnace body but not touching it. The guide pipe is divided into an inner ring guide pipe and an outer ring guide pipe. The guide outlet of the inner ring guide pipe is placed in the inner ring of the hot air ring pipe, and the guide outlet of the outer ring guide pipe is placed in the outer ring of the hot air ring pipe. Some of the sides of the outer ring guide pipe are provided with iron mouth ventilation pipes extending outward, and the iron mouth ventilation pipes are aligned with the iron mouth and correspond one to one; the bottom support is arranged at the bottom of the hot air ring pipe and placed at the bottom of the furnace to provide support for the hot air ring pipe, so that the hot air ring pipe is stably arranged in the furnace, thereby ensuring the stability of the furnace baking effect.

[0008] Preferably, the heat dissipation flow platform includes a heat dissipation plate, a platform bracket and a balance bracket. The heat dissipation plate is placed above the air inlet, and the platform bracket is arranged at the bottom of the heat dissipation plate. The bottom of the platform bracket is fixed to the bottom of the blast furnace to provide uniform supporting force to the heat dissipation plate. The balance bracket is radially arranged on the periphery of the heat dissipation plate, and one end of the balance bracket is connected to the heat dissipation plate, and the other end is connected to the furnace wall, which serves to limit the position of the heat dissipation flow platform and increase stability.

[0009] Preferably, the diameter of the heat sink is 0.9-0.95 of the inner diameter of the blast furnace, and the bottom surface of the heat sink is 0.1 m away from the air inlet.

[0010] Preferably, the inner ring guide pipe includes a central guide pipe and an inner ring guide pipe. The guide outlet of the central guide pipe is placed at the center of the furnace, and the guide outlet of the inner ring guide pipe is placed at the outer ring of the center of the furnace, forming a four-ring guide together with the outer ring guide pipe and the iron mouth ventilation pipe, so that the hot gas flows evenly to the bottom of the blast furnace.

[0011] Preferably, the central guide pipe, inner ring guide pipe and outer ring guide pipe are all L-shaped, including horizontal pipes and vertical pipes, which are connected to the hot air ring pipe through the horizontal pipe, and the vertical pipe is connected to the horizontal pipe through a bend pipe; the iron mouth ventilation pipe is arranged on one side of the vertical pipe of the outer ring guide pipe, and the iron mouth ventilation pipe is arranged horizontally.

[0012] Preferably, the hot gas ring pipe is 1.3~1.5m away from the furnace bottom, the inner diameter of the hot gas ring pipe is 0.35~0.45m, the ring diameter is 0.4~0.6 of the inner wall diameter of the blast furnace, the diameter of the hot gas input pipe is 0.1~0.18m, and the inner diameter of the guide pipe is 0.04~0.06m.

[0013] Preferably, the air inlets are arranged radially along the furnace wall and evenly distributed circumferentially.

[0014] Preferably, the iron openings are arranged radially along the furnace wall and are evenly distributed circumferentially.

[0015] Preferably, one central flow guide pipe is provided, 6 to 10 inner ring flow guide pipes are provided, and 20 to 40 outer ring flow guide pipes are provided.

[0016] Preferably, a thermocouple is provided at the iron mouth to detect the internal temperature in real time.

[0017] Specifically, hot air enters from the air inlet, enters the hot air ring tube from the top of the hot air ring tube through the hot air input pipe, and the hot air density is smaller than that of air. It gradually gathers from top to bottom in the hot air ring tube. In the process of hot air gathering, the heat of the hot air with uneven heat is equalized. As the amount of hot air increases, the hot air is densely dispersed at the bottom of the furnace through the guide outlets of each guide tube. The hot air from the iron mouth ventilation pipe is aimed at the iron mouth for concentrated baking, thereby achieving relative concentration and redispersion of the hot air, improving the uniformity of the hot air heat, and thereby improving the uniformity and stability of the overall baking effect.

[0018] The heat dissipation flow platform and the hot gas duct cooperate with each other. The hot gas duct accumulates the hot gas to the bottom of the furnace. The hot gas flows from bottom to top and passes through the gap between the heat dissipation flow platform and the furnace wall, ensuring that the heat flow evenly bakes the furnace body and optimizes the baking effect.

[0019] The beneficial effects of the utility model are:

[0020] The utility model provides a hot air duct, which is divided into a hot air input pipe, a hot air ring pipe and a guide pipe. The hot air is concentrated in the hot air ring pipe through the hot air input pipe, and then dispersed at the bottom of the furnace through the guide outlet of the guide pipe, thereby realizing the concentration and redispersion of the hot air, forming an overall intensive baking, improving the uniformity of the hot air heat, and further improving the uniformity and stability of the overall baking effect.

[0021] The utility model arranges multiple ring guide pipes on the hot gas ring pipe, wherein the central guide pipe, the inner ring guide pipe, the outer ring guide pipe and the iron mouth ventilation pipe form a four-ring guide pipe, so that the hot gas flows evenly and densely to the bottom of the blast furnace, forming intensive baking.

[0022] The utility model cooperates with the heat dissipation flow platform and the hot air duct, and the hot air duct accumulates the hot air to the bottom of the furnace. The hot air flows from bottom to top and passes through the gap between the heat dissipation flow platform and the furnace wall, ensuring that the heat flow evenly bakes the furnace body and optimizes the furnace baking effect.

[0023] By adopting the above scheme, the utility model carries out concentrated redispersion of hot air, and the hot air flows evenly and densely to the bottom of the blast furnace, forming an overall intensive baking, improving the uniformity of the hot air heat, and then improving the uniformity and stability of the overall baking effect, thereby ensuring the quality of the blast furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 It is an overall sectional view of the utility model.

[0026] Figure 2 It is a structural schematic diagram of the hot air conduit of the utility model.

[0027] In the figure, 1-blast furnace wall, 2-heat dissipation flow platform, 3-hot gas duct, 11-air inlet, 12-iron mouth; 21-heat dissipation plate, 22-platform bracket, 23-balance bracket; 31-hot gas ring pipe, 32-hot gas input pipe, 33-inner ring guide pipe, 34-outer ring guide pipe, 35-iron mouth ventilation pipe, 36-center guide pipe, 37-bottom support. Implementation

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] like Figure 1~2As shown, a furnace duct device for use in a blast furnace, It includes a heat dissipation flow platform 2 and a hot gas duct 3. A plurality of air inlets 11 are evenly arranged on the upper part of the blast furnace wall 1. A plurality of iron holes 12 are evenly arranged on the inner side of the bottom of the blast furnace wall 1. The heat dissipation flow platform 2 is placed above the air inlet 11. The hot gas duct 3 includes a hot gas ring pipe 31, a hot gas input pipe 32, a guide pipe and a bottom support 37. The hot gas ring pipe 31 is horizontally arranged in the furnace, and the hot gas ring pipe 31 is placed between the air inlet 11 and the iron hole 12. The top of the hot gas ring pipe 31 is connected to the air inlet 11 through the hot gas input pipe 32. The hot gas input pipe 32 corresponds to the air inlet 11 one by one. A plurality of groups of guide pipes are arranged on the hot gas ring pipe 31. The inner diameter of the hot gas ring pipe 31 is larger than the inner diameter of the hot gas input pipe 32. The inner diameter of the hot gas input pipe 32 is larger than the inner diameter of the guide pipe. The inner diameter of the hot gas input pipe 32 is larger than the diameter of the air inlet 11. The inner diameter of the guide pipe is 0.1-0.3 of the inner diameter of the hot gas ring pipe 31.

[0033] The guide pipe is connected to the side of the hot air ring pipe 31, and the guide outlet of the guide pipe is set downward and aligned with the bottom of the furnace body. The guide outlet is close to the furnace body but not touching it. The guide pipe is divided into an inner ring guide pipe 33 and an outer ring guide pipe 34. The guide outlet of the inner ring guide pipe 33 is placed in the inner circle of the hot air ring pipe 31, and the guide outlet of the outer ring guide pipe 34 is placed in the outer circle of the hot air ring pipe 31. Some of the sides of the outer ring guide pipe 34 are provided with iron mouth ventilation pipes 35 extending outward, and the iron mouth ventilation pipes 35 are aligned with the iron mouth 12 and correspond one to one; the bottom support 37 is arranged at the bottom of the hot air ring pipe 31 and placed at the bottom of the furnace, providing support for the hot air ring pipe 31, so that the hot air ring pipe 31 is stably set in the furnace, ensuring the stability of the furnace baking effect.

[0034] The heat dissipation flow platform 2 includes a heat dissipation plate 21, a platform bracket 22 and a balance bracket 23. The heat dissipation plate 21 is placed above the air inlet 11, and the platform bracket 22 is arranged at the bottom of the heat dissipation plate 21. The bottom of the platform bracket 22 is fixed to the bottom of the blast furnace to provide uniform supporting force to the heat dissipation plate 21. The balance bracket 23 is radially arranged on the periphery of the heat dissipation plate 21. One end of the balance bracket 23 is connected to the heat dissipation plate 21, and the other end is connected to the furnace wall, which plays a role in limiting the position of the heat dissipation flow platform 2 and increasing stability.

[0035] The inner ring guide pipe 33 includes a central guide pipe 36 and an inner ring guide pipe. The guide outlet of the central guide pipe 36 is placed at the center of the furnace, and the guide outlet of the inner ring guide pipe is placed at the outer ring of the center of the furnace, forming a four-ring guide with the outer ring guide pipe 34 and the iron mouth ventilation pipe 35, so that the hot gas flows evenly to the bottom of the blast furnace.

[0036] The central guide pipe 36, the inner ring guide pipe, and the outer ring guide pipe 34 are all L-shaped, including a horizontal pipe and a vertical pipe, which are connected to the hot air ring pipe 31 through the horizontal pipe, and the vertical pipe is connected to the horizontal pipe through a bend pipe; the iron mouth ventilation pipe 35 is arranged on one side of the vertical pipe of the outer ring guide pipe 34, and the iron mouth ventilation pipe 35 is arranged horizontally.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A furnace duct device for use in a blast furnace, comprising a heat dissipation flow platform and a hot gas duct, a plurality of air inlets are evenly arranged on the upper part of the blast furnace wall, a plurality of iron holes are evenly arranged on the inner side of the bottom of the blast furnace wall, the heat dissipation flow platform is placed above the air inlet, and is characterized in that: The hot gas conduit comprises a hot gas ring pipe, a hot gas input pipe, a guide pipe and a bottom support. The hot gas ring pipe is horizontally arranged in the furnace, the hot gas ring pipe is placed between the air inlet and the iron mouth, the top of the hot gas ring pipe is connected to the air inlet through the hot gas input pipe, the hot gas input pipe corresponds to the air inlet one by one, and a plurality of guide pipes are arranged on the hot gas ring pipe. The inner diameter of the hot gas ring pipe is larger than the inner diameter of the hot gas input pipe, the inner diameter of the hot gas input pipe is larger than the inner diameter of the guide pipe, the inner diameter of the hot gas input pipe is larger than the diameter of the air inlet, and the inner diameter of the guide pipe is 0.1 of the inner diameter of the hot gas ring pipe. ~0.3, the guide pipe is connected to the side of the hot gas ring pipe, the guide outlet of the guide pipe is set downward and aligned with the bottom of the furnace body, the guide outlet is close to the furnace body but not touching it, the guide pipe is divided into an inner ring guide pipe and an outer ring guide pipe, the guide outlet of the inner ring guide pipe is placed in the inner ring of the hot gas ring pipe, and the guide outlet of the outer ring guide pipe is placed in the outer ring of the hot gas ring pipe, and some of the sides of the outer ring guide pipe are provided with iron mouth ventilation pipes extending outward, and the iron mouth ventilation pipes are aligned with the iron mouth and correspond one to one; the bottom support is arranged at the bottom of the hot gas ring pipe and placed on the bottom of the furnace.

2. A furnace duct device for use in a blast furnace according to claim 1, characterized in that: The heat dissipation flow platform includes a heat dissipation plate, a platform bracket and a balance bracket. The platform bracket is arranged at the bottom of the heat dissipation plate, and the bottom of the platform bracket is fixed to the bottom of the blast furnace; the balance bracket is radially arranged at the periphery of the heat dissipation plate, one end of the balance bracket is connected to the heat dissipation plate, and the other end is connected to the furnace wall.

3. A furnace duct device for use in a blast furnace according to claim 2, characterized in that: The diameter of the heat sink is 0.8-0.95 of the inner diameter of the blast furnace.

4. A furnace duct device for use in a blast furnace according to claim 1, characterized in that: The inner ring guide pipe includes a central guide pipe and an inner ring guide pipe. The guide outlet of the central guide pipe is placed at the center of the furnace, and the guide outlet of the inner ring guide pipe is placed at the outer ring of the center of the furnace, forming a four-ring guide with the outer ring guide pipe and the iron mouth ventilation pipe.

5. A furnace duct device for use in a blast furnace according to claim 4, characterized in that: The central guide pipe, inner ring guide pipe and outer ring guide pipe are all L-shaped, including horizontal pipes and vertical pipes, which are connected to the hot air ring pipe through the horizontal pipe, and the vertical pipe is connected to the horizontal pipe through a bend pipe; the iron mouth ventilation pipe is arranged on one side of the vertical pipe of the outer ring guide pipe, and the iron mouth ventilation pipe is arranged horizontally.

6. A furnace duct device for use in a blast furnace according to claim 1, characterized in that: The hot gas ring pipe is 1.3~1.5m away from the furnace bottom, the inner diameter of the hot gas ring pipe is 0.35~0.45m, the ring diameter is 0.4~0.6 of the inner wall diameter of the blast furnace, the diameter of the hot gas input pipe is 0.1~0.18m, and the inner diameter of the guide pipe is 0.04~0.06m.

7. A furnace duct device for use in a blast furnace according to claim 5, characterized in that: There is one central flow guide pipe, 6 to 10 inner ring flow guide pipes, and 20 to 40 outer ring flow guide pipes.

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