Metallurgical furnace flue

Abstract

The utility model provides a metallurgical furnace flue which is used for communicating a furnace body and a boiler, the metallurgical furnace flue comprises a flue main body, the flue main body comprises a flue inlet part and a flue top plate, one side of the flue main body is provided with a flue outlet, and the outer side of the flue top plate is provided with a cold water flashboard used for blocking the flue outlet. The cold water flashboard comprises a cold water flashboard body and a flashboard support, an accident smoke outlet is formed in the side, close to the cold water flashboard, of a flue top plate of the cold water flashboard body, the metallurgical furnace flue further comprises a hanging bracket used for hanging the flue body, and the hanging bracket comprises a suspension frame close to one end of the flue inlet portion and a plurality of connecting rods arranged around the flue body at intervals. The connecting rod comprises a rod portion with one end fixedly connected with the suspension and a suspension block with one end away from the suspension and perpendicular to the rod portion. According to the metallurgical furnace flue disclosed by the utility model, the cold water flashboard and the accident smoke outlet are arranged on the flue top plate, so that a boiler can be repaired and maintained in real time, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical furnaces, in particular to a metallurgical furnace flue. Background Art

[0002] Metallurgical furnace flues are primarily used to discharge flue gases generated during the metallurgical process, while also fulfilling key tasks such as flue gas purification and waste heat recovery. With increasingly stringent environmental protection requirements and the continuous improvement of energy efficiency, the design and technology of metallurgical furnace flues are also constantly improving.

[0003] In the prior art, the flue of the metallurgical furnace adopts a screw hanging method. This solution is to add a screw on the upper part of the flue beam to support the flue. However, this hanging method is prone to swinging left and right when the metallurgical furnace is running, and has very high requirements on the force of the screw. If it is hung for a long time, the screw may be damaged, which will affect the safety of the metallurgical furnace. Alternatively, the flue is supported on the furnace body, which increases the force load on the furnace body. The flue also does not have an emergency smoke exhaust port and a flue water-cooling gate, which makes it inconvenient for operators to perform maintenance operations on the boiler. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a metallurgical furnace flue, aiming to solve the technical problems in the existing technology that the support of the flue body on the furnace body causes load on the furnace body and makes it inconvenient for operators to perform boiler maintenance operations.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: a metallurgical furnace flue, used to connect a furnace body and a boiler, the metallurgical furnace flue includes a flue main body, the flue main body includes a flue inlet portion close to one end of the furnace body, and a flue top plate away from one end of the flue inlet portion, a flue outlet is provided on the side of the flue main body close to the flue top plate, a cold water gate plate for blocking the flue outlet is provided on the outer side of the flue top plate, an emergency smoke exhaust port is provided on the side of the flue top plate close to the cold water gate plate, the metallurgical furnace flue also includes a hanger for suspending the flue main body, and a civil engineering beam for supporting the flue main body, one end of the hanger is fixedly connected to the flue main body, and the end of the hanger away from the flue main body is connected to the civil engineering beam.

[0006] Compared with the prior art, the beneficial effects of the present invention are: by installing a hanger on the outside of the flue main body, the flue main body is lifted up by the hanger, so that the flue main body and the furnace body are in contact without being squeezed, thereby reducing the load of the furnace body and reducing the manufacturing cost of the furnace body; and a cold water gate and an emergency smoke exhaust port are arranged on the flue top plate of the flue main body, which is convenient for real-time maintenance of the boiler in the event of a boiler failure in the future.

[0007] According to one aspect of the above technical solution, the cold water gate includes a cold water gate body, and a gate bracket one end of which is fixedly connected to the flue top plate and is used to support and fix the cold water gate body. A chain is provided between the gate bracket and the cold water gate body, and the chain is movably connected to the gate bracket. The chain connection allows the chain to be lowered when a boiler fails, thereby lowering the cold water gate body, blocking the flue outlet, blocking the connection between the flue outlet and the boiler, and discharging the high-temperature flue gas from the accident exhaust port, so that the boiler can be repaired in real time. In addition, the cold water gate can cool the high-temperature flue gas, which not only avoids its own deformation due to high temperature, but also reduces the temperature on one side of the boiler, making it easier for personnel to maintain.

[0008] According to one aspect of the above technical solution, the hanger includes a suspension near one end of the flue inlet for fixedly supporting the outside of the flue main body, and a plurality of connecting rods arranged at intervals around the flue main body. The connecting rod includes a rod portion fixedly connected to the suspension at one end, and a suspension block vertically arranged to the rod portion at one end away from the suspension. The suspension is fixedly connected to the flue main body, thereby enhancing the structural strength of the flue and also serving as a hanging point. In addition, by installing multiple rods, the suspension tension of the hanger is increased, and the stability of the hanger is also improved.

[0009] According to one aspect of the above technical solution, the suspension block is arranged close to one end of the rod and passes through the rod. With this design, the structural strength of the hanging point at one end of the hanger is enhanced and later maintenance is facilitated. In addition, since the process requirements for the suspension block are not high, the investment cost is reduced.

[0010] According to one aspect of the above technical solution, a brick-lined water jacket is provided between the flue inlet and the furnace body. By adding the brick-lined water jacket, the erosion of the connection between the high-temperature flue main body and the furnace body is reduced, and the expansion load at the connection is reduced.

[0011] According to one aspect of the above technical solution, an eagle-beak brick is provided at one end of the flue main body located at the flue outlet, and the eagle-beak brick is provided with an inclined surface on the side close to the flue main body, and the inclined surface is inclined close to the boiler side, and the eagle-beak brick is recessed inwardly to form a convex edge on the side away from the flue main body; by installing the eagle-beak brick at the flue outlet end, the scouring of the boiler inlet by the high-temperature flue gas is reduced. In addition, the eagle-beak brick adopts this design, which has a guiding function, which is beneficial to the discharge of high-temperature flue gas, and the convex edge formed by the recess is used to cover the boiler connection edge, thereby avoiding direct contact between the boiler edge and the high-temperature gas, which leads to a decrease in the service life of the boiler.

[0012] According to one aspect of the above technical solution, a smoke exhaust cavity is provided inside the flue main body, and the smoke exhaust cavity is arranged vertically. This design feature reduces the accumulation of smoke and dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an axial cross-sectional view of the side of a metallurgical furnace flue in one embodiment of the present invention;

[0014] Figure 2 This is a front axial cross-sectional view of a metallurgical furnace flue in one embodiment of the present utility model;

[0015] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0016] Explanation of the main component symbols: 1-furnace body, 2-bricked water jacket, 3-hanger, 31-suspension, 32-connecting rod, 321-rod, 322-suspension block, 4-flue body, 41-flue inlet, 42-flue cavity, 43-flue outlet, 44-observation window, 45-cleaning hole, 46-flue top plate, 5-cold water gate, 51-cold water gate body, 52-gate bracket, 53-chain, 6-accidental smoke exhaust port, 7-eagle beak brick, 71-inclined surface, 72-convex edge;

[0017] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0018] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] See also Figures 1 to 2, a metallurgical furnace flue provided by an embodiment of the present invention is used to connect the furnace body and the boiler, the metallurgical furnace flue includes a flue body 4, the flue body 4 includes a flue inlet 41 close to one end of the furnace body 1, and a flue top plate 46 away from one end of the flue inlet 41, the flue body 4 is provided with a flue outlet 43 on one side close to the flue top plate 46, a cold water gate 5 for blocking the flue outlet 43 is provided on the outside of the flue top plate 46, the cold water gate 5 includes a cold water gate body 51, and one end is fixedly connected to the flue top plate 46 and is used to support and fix the cold water gate 5. The gate bracket 52 of the gate body 51, the flue top plate 46 of the cold water gate body 51 is provided with an emergency smoke exhaust port 6 on the side close to the cold water gate 5, and the metallurgical furnace flue also includes a hanger 3 for suspending the flue body 4, the hanger 3 includes a hanger 31 for fixedly supporting the outside of the flue body 4 near the flue inlet 41, and a plurality of connecting rods 32 arranged at intervals around the flue body 4, the connecting rod 32 includes a rod 321 fixedly connected to the hanger 31 at one end, and a suspension block 322 perpendicularly arranged to the rod 321 at one end away from the suspension 31. The entire flue body is suspended by connecting and fixing the suspension block 322 to an external civil engineering beam (not shown in the figure).

[0022] See also Figure 1 As can be seen, the metallurgical furnace flue is set at the upper end of the furnace body 1. Since the metallurgical furnace flue is heavy, directly using the furnace body 1 as a supporting platform and placing it on the furnace body 1 has certain requirements on the load-bearing design of the furnace body 1, and is not conducive to the later maintenance of the furnace body 1. In addition, the high-temperature expansion and deformation of the connection will lead to the instability of the overall structure. Therefore, the metallurgical furnace flue needs to be hoisted, such as Figure 1 As can be seen, a hanger 3 is installed on the outside of the flue body 4, wherein the hanger 3 includes a suspension 31 fixedly connected to the bottom end of the flue body 4 and a plurality of connecting rods 32. The suspension 31 is arranged around the flue body 4 and is in contact and fixed connection with the flue body 4, which not only plays the role of stabilizing the flue body 4, but also serves as a load-bearing setting connection point. The connecting rod 32 is connected to the suspension 31 through the connection point, and a plurality of connecting rods 32 are arranged around the flue body 4 along the suspension 31 at intervals, wherein the connecting rod 32 includes a rod portion 321 and a suspension block 322. One end of the rod portion 321 is fixedly connected to the suspension 31, and the other end is equipped with a suspension block 322. The suspension block 322 is installed at a distance from the top of the rod portion 321 and penetrates the rod portion 321. Specifically, the suspension block 322 is arranged close to one end of the rod portion 321 and penetrates the rod portion 321. It can be understood that the rod portion 321 on which the hanger 3 is installed is higher than the top of the flue body 4, which is convenient for later lifting and installation. Figure 2As can be seen, the two ends of the suspension block 322 extending out of the rod 321 are symmetrically arranged about the rod 321, which facilitates uniform force when the two sides are suspended simultaneously. Furthermore, the suspension block 322 is positioned at a distance from the top of the rod 321, allowing the rod 321 to withstand greater tension during suspension. Furthermore, to ensure greater stability during suspension of the flue body 4, the rod 321 and the flue body 4 are provided with several fixed connection points. Finally, by erecting the suspension block 322, the flue body 4 is suspended from the upper end of the furnace body 1, making the metallurgical furnace flue and the furnace body 1 independent of each other, thereby controlling the metallurgical furnace flue and the furnace body 1 to achieve contact but not a squeeze connection.

[0023] See also Figure 1 It can be seen that the high-temperature flue gas enters the metallurgical furnace flue through the furnace body 1. Since the inner diameter of the flue inlet 41 in the metallurgical furnace flue is smaller than the exhaust port of the furnace body 1, one side of the flue inlet 41 of the metallurgical furnace flue is easily eroded by the high-temperature flue gas, which accelerates the damage of the metallurgical furnace flue. In order to prevent the corners from being eroded by high-temperature gas, a brick-lined water jacket 2 is installed between the metallurgical furnace flue and the furnace body 1. Specifically, a brick-lined water jacket 2 is provided between the flue inlet 41 and the furnace body 1.

[0024] In this embodiment, the high-temperature flue gas moves upward along the flue cavity 42, wherein the interior of the flue body 4 is enclosed by refractory masonry to form an upright vertical flue cavity 42 without a slope support surface, which can reduce the adhesion of smoke and dust. Specifically, a smoke exhaust cavity is provided inside the flue body 4, and the smoke exhaust cavity is vertically arranged. Figure 2 As shown, an observation window 44 and a cleaning hole 45 are also provided on one side of the flue body 4, wherein the observation window 44 is provided near the flue inlet end for convenient observation of the smoke intake status, and the cleaning hole 45 is provided near the height of the flue outlet 43 for convenience of later cleaning of internal smoke and dust, and can also be used as an observation hole to observe the internal smoke accumulation status.

[0025] See also Figure 2 and Figure 3The boiler (not shown in the figure) is connected to the flue outlet 43 end of the metallurgical furnace flue, and the high-temperature flue gas passes through the flue outlet 43 and then into the boiler. In order to prevent the boiler from being damaged by the direct scouring of the high-temperature flue gas, a high-temperature resistant hawkbill brick 7 is installed at the junction of the boiler and the metallurgical furnace flue. Specifically, the flue body 4 is provided with a hawkbill brick 7 at one end of the flue outlet 43, and the hawkbill brick 7 is provided with an inclined surface 71 on the side close to the flue body 4. The inclined surface 71 is inclined near the boiler side, and the hawkbill brick 7 is recessed inwardly to form a convex edge 72 on the side away from the flue body 4. By setting the side of the hawkbill brick 7 that is directly scourged by the high-temperature flue gas to an outwardly inclined form, the angle of the frontal impact of the high-temperature flue gas and the hawkbill brick 7 can be reduced, the air outlet resistance can be reduced, and the discharge of the high-temperature smoke body can be facilitated; and the convex edge 72 formed by the recess on the other side of the hawkbill brick 7 can be used to wrap the boiler inlet edge, and at the same time, the convex edge 72 resists direct contact between the high temperature and the boiler edge, thereby protecting the structure of the boiler edge.

[0026] See also Figure 2 In this embodiment, when the metallurgical device is in operation, if a boiler fails, the cold water gate 5 provided on the flue top plate 46 can be lowered to block the communication channel between the flue body 4 and the boiler, and the high-temperature flue gas can be introduced into the emergency exhaust port 6 for discharge, so that maintenance personnel can repair the boiler in real time. It can be understood that the emergency exhaust port 6 is in a closed state under normal conditions. The cold water gate body 51 is movably connected to the gate bracket 52. Obviously, the movable connection method can also be other forms, such as hydraulic lifting and gear lifting. In this embodiment, the cold water gate body 51 is movably connected to the gate bracket 52 through a chain 53, mainly because the chain 53 is suitable for long-term stable placement in a high-temperature environment and has the characteristics of simple structure. Preferably, the gate bracket 52 includes a chain 53 for connecting the cold water gate 5, and the chain 53 is movably connected to the gate bracket 52.

[0027] In summary, the metallurgical furnace flue in the above-mentioned embodiment of the present invention, by installing a hanger on the outside of the flue body, lifts the metallurgical furnace flue, and removes the hard contact between the metallurgical furnace flue and the furnace body, so that the metallurgical furnace flue and the furnace body are independent of each other, avoiding damage to the furnace body caused by the load of the metallurgical furnace flue, and installing a cold water gate and an emergency smoke exhaust port on the flue top plate, so that the present invention can repair and maintain the boiler in an accident without stopping the operation of the furnace body. In addition, in order to prevent high-temperature flue gas from scouring the edges of the flue body and the boiler, thereby shortening the service life of the flue body and the boiler, high-temperature resistant brick-lined water jackets and eagle-beak bricks are respectively installed at the junction of the flue body, the furnace body and the boiler, thereby avoiding direct scouring of the flue body and the edges of the boiler by high-temperature flue gas, thereby improving the service life of the entire metallurgical device.

[0028] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0029] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A metallurgical furnace flue, used to connect the furnace body and the boiler, characterized in that: The metallurgical furnace flue includes a flue main body, which includes a flue inlet near one end of the furnace body and a flue top plate away from one end of the flue inlet. A flue outlet is provided on the side of the flue main body close to the flue top plate, a cold water gate is provided on the outer side of the flue top plate for blocking the flue outlet, and an emergency smoke exhaust port is provided on the side of the flue top plate close to the cold water gate plate. The metallurgical furnace flue also includes a hanger for suspending the flue main body and a civil engineering beam for supporting the flue main body, one end of the hanger is fixedly connected to the flue main body, and the end of the hanger away from the flue main body is connected to the civil engineering beam.

2. The metallurgical furnace flue according to claim 1, characterized in that: The cold water gate plate includes a cold water gate plate body, and a gate plate bracket having one end fixedly connected to the flue top plate and used to support and fix the cold water gate plate body. A chain is provided between the gate plate bracket and the cold water gate plate body, and the chain is movably connected to the gate plate bracket.

3. The metallurgical furnace flue according to claim 1, characterized in that: The hanger includes a suspension near one end of the flue inlet for fixedly supporting the outside of the flue main body, and a plurality of connecting rods arranged at intervals around the flue main body. The connecting rod includes a rod portion fixedly connected to the suspension at one end, and a suspension block arranged perpendicularly to the rod portion at one end away from the suspension.

4. The metallurgical furnace flue according to claim 3, characterized in that: The suspension block is arranged close to one end of the rod and passes through the rod.

5. The metallurgical furnace flue according to claim 1, characterized in that: A brick-lined water jacket is provided between the flue inlet and the furnace body.

6. The metallurgical furnace flue according to claim 5, characterized in that: The flue body is provided with an eaglebone brick at one end of the flue outlet. The eaglebone brick is provided with an inclined surface on the side close to the flue body. The inclined surface is tilted close to the boiler. The eaglebone brick is concave inwardly to form a convex edge on the side away from the flue body.

7. The metallurgical furnace flue according to claim 6, characterized in that: A smoke exhaust cavity is provided inside the flue main body, and the smoke exhaust cavity is arranged vertically.

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