Converter flue gas waste heat boiler

Abstract

The utility model provides a converter flue gas waste heat boiler, and belongs to the technical field of waste heat boilers. Comprising a smoke hood, the smoke hood is sequentially connected with a furnace mouth section flue, a middle section flue and a tail section flue, the outer wall of the middle section flue is formed by connecting a plurality of heated pipes, a heat conduction plate is fixed to the side, facing the interior of the middle section flue, of each heated pipe, and heat conduction fins are fixed to the middle of the outer surface of each heat conduction plate. The heat conduction fins are wave-shaped sheet bodies, and the heat conduction fins are arranged in the length direction of the heated pipe. The adjacent heated pipes are fixed through welding. The heat conduction plate is fixed to the side, facing the interior of the middle-section flue, of the heated pipe through welding, and the cross section of the heat conduction plate is of an arc-shaped structure matched with the outer edge face of the heated pipe. And a heat transfer cylinder is mounted in the heated pipe. Compared with the prior art, the converter flue gas waste heat recycling device can improve the converter flue gas waste heat recycling efficiency to a certain extent.

Description

Technical Field

[0001] This utility model relates to the field of waste heat boiler technology, and in particular to a converter flue gas waste heat boiler. Background Technology

[0002] A converter flue gas waste heat boiler is a device used to recover the waste heat from the high-temperature flue gas generated during the converter steelmaking process. This type of boiler typically employs a vaporization cooling flue structure, its main purpose being to cool the flue gas before sending it to the subsequent dust removal system, while simultaneously recovering the sensible heat from the flue gas to improve energy utilization efficiency. It is also generally equipped with a remote monitoring system to monitor the waste heat recovery effect in real time.

[0003] Currently, Chinese patent CN219772168U discloses a converter gasification flue. It utilizes a heat-conducting plate welded to the inner wall of the heated tube and connected as a single unit via a connecting section. This protects the heated tube, preventing direct contact between the high-temperature flue gas and the tube, thus extending its service life. While this structure effectively protects the tube, the fin structure on the heat-conducting plate requires further optimization to improve heat transfer efficiency. Additionally, the heating effect on the water inside the tube is relatively limited and also needs further improvement.

[0004] Therefore, this application provides a converter flue gas waste heat boiler to solve the above-mentioned technical problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a converter flue gas waste heat boiler to address the issue that the heat conduction efficiency and heating effect of the heat transfer tubes in the prior art still need further optimization.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A converter flue gas waste heat boiler includes a flue hood, which is sequentially connected to a flue at the furnace inlet, a middle flue, and a final flue. The outer wall of the middle flue is formed by a plurality of interconnected heating tubes. A heat-conducting plate is fixed to one side of the heating tube facing into the middle flue. A heat-conducting fin is fixed to the middle of the outer surface of the heat-conducting plate. The heat-conducting fin is a corrugated plate and is arranged along the length of the heating tube.

[0008] Optionally, adjacent heated tubes are fixed together by welding.

[0009] Optionally, the heat-conducting plate is fixed to the side of the heated pipe facing the middle flue by welding, and the cross-section of the heat-conducting plate is an arc-shaped structure adapted to the outer edge of the heated pipe.

[0010] Optionally, a heat transfer cylinder is installed inside the heated tube.

[0011] Optionally, the inner wall of the heat transfer cylinder is fixed with a plurality of heat transfer fins facing the middle of the heat-receiving tube.

[0012] Optionally, the heat transfer fins are arranged along the length of the heat transfer cylinder.

[0013] Optionally, four heat transfer fins are provided and are evenly distributed on the inner wall of the heat transfer cylinder.

[0014] Compared with the prior art, this utility model has at least the following beneficial effects:

[0015] In the above scheme, thanks to the wavy heat-conducting fins on the heat-conducting plate, it forms an undulating structure along the direction of the heat-receiving tube. This not only increases the surface area of ​​the heat-conducting plate and improves the heat conduction efficiency, but also reduces the flow velocity of flue gas on its surface, thereby improving the waste heat recovery efficiency of the converter flue gas.

[0016] In the above scheme, thanks to the heat transfer cylinder inside the heating pipe, the water can be heated more evenly through the heat transfer fins on the inner wall of the heat transfer cylinder, which can improve the heating effect to a certain extent.

[0017] In summary, compared with existing technologies, this device can improve the efficiency of waste heat recovery and utilization of converter flue gas to a certain extent. Attached Figure Description

[0018] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present invention and, together with the specification, further serve to explain the principles of the present invention and enable those skilled in the art to implement and use the present invention.

[0019] Figure 1 This is a schematic diagram of a converter flue gas waste heat boiler.

[0020] Figure 2 This is a schematic diagram of the middle section of the flue.

[0021] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A;

[0022] Figure 4 This is a schematic diagram of the heat transfer cylinder.

[0023] [Figure Labels]

[0024] 1. Fume hood; 2. Furnace opening section flue; 3. Middle section flue; 4. Heat receiving tube; 5. Terminal section flue; 6. Heat conducting plate; 601. Heat conducting fins; 7. Heat transfer cylinder; 701. Heat transfer fins.

[0025] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0026] The present invention provides a converter flue gas waste heat boiler in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; for some known technologies, those skilled in the art can also use other alternative methods to implement the invention; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0027] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0028] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0029] It is understood that the meanings of “on”, “above”, and “above” in this utility model should be interpreted in the broadest manner, such that “on” not only means “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” not only means “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0030] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0031] like Figure 1 and Figure 2 As shown, an embodiment of this utility model provides a converter flue gas waste heat boiler, including a flue hood 1. The flue hood 1 is sequentially connected to a furnace mouth section flue 2, a middle section flue 3, and a terminal section flue 5. Specifically, the flue hood 1, the furnace mouth section flue 2, the middle section flue 3, and the terminal section flue 5 are all connected and installed by setting supports or sealing connection structures.

[0032] The outer wall of the middle flue 3 is formed by several heated pipes 4 connected to each other by welding to form a tubular structure. A heat-conducting plate 6 is fixed to the side of the heated pipes 4 facing the inside of the middle flue 3, in conjunction with... Figure 3 As shown, the heat-conducting plate 6 has an arc-shaped cross-section that fits the outer edge of the heat-receiving pipe 4, and is fixed to the side of the heat-receiving pipe 4 facing the middle flue 3 by welding, thus forming a fixed structure.

[0033] Meanwhile, a heat-conducting fin 601 is fixed in the middle of the outer surface of the heat-conducting plate 6. The heat-conducting fin 601 is a corrugated sheet and is arranged along the length of the heat-receiving pipe 4. This allows the heat-conducting plate 6 to protect the inner wall of the heat-receiving pipe 4, while also increasing the contact area with the flue gas through the heat-conducting fin 601. In addition, the corrugated heat-conducting fin 601 will reduce the flue gas velocity to a certain extent, allowing the flue gas to fully contact the heat-conducting fin 601 for heat conduction and improving the waste heat utilization efficiency.

[0034] In addition, a heat transfer cylinder 7 is installed inside the heating pipe 4. (This is in conjunction with...) Figure 4 As shown, the inner wall of the heat transfer cylinder 7 is fixed with four heat transfer fins 701 facing the middle of the heat receiving pipe 4. The heat transfer fins 701 are evenly distributed on the inner wall of the heat transfer cylinder 7 and are arranged along the length of the heat transfer cylinder 7, so that (701) can heat the water more evenly. Compared with the prior art, which only relies on the heat conducted from the inner wall of the heat receiving pipe 4 for heating from the outside to the inside, this structure can conduct heat to the inside of the water through the heat transfer fins 701, and heat the inside and outside at the same time, thus improving the heating effect.

[0035] The working principle provided by this utility model is that, during use, the converter flue gas waste heat boiler can form an undulating structure along the direction of the heating pipe 4 through the wavy heat-conducting fins 601 on the heat-conducting plate 6. This not only increases the surface area of ​​the heat-conducting plate 6 and improves the heat conduction efficiency, but also reduces the flow velocity of the flue gas on its surface and improves the waste heat recovery efficiency of the converter flue gas.

[0036] Meanwhile, by setting a heat transfer cylinder 7 inside the heating pipe 4, the heat transfer fins 701 on the inner wall of the heat transfer cylinder 7 can be used to heat the water more evenly, which can improve the heating effect to a certain extent.

[0037] In summary, compared with existing technologies, this device can improve the efficiency of waste heat recovery and utilization of converter flue gas to a certain extent.

[0038] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0039] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A converter flue gas waste heat boiler comprising a hood (1) connected in sequence with a furnace mouth section flue (2), a middle section flue (3) and a tail section flue (5), characterized in that, The outer wall of the middle section flue (3) is formed by a plurality of heat receiving pipes (4) connected with each other, the heat receiving pipes (4) are fixed with heat conducting plates (6) on the side facing the inside of the middle section flue (3), the outer surface of the heat conducting plates (6) is fixed with heat conducting fins (601) in the middle, the heat conducting fins (601) are wave-shaped plates, and the heat conducting fins (601) are arranged along the length direction of the heat receiving pipes (4).

2. The converter flue gas waste heat boiler according to claim 1, characterized in that The adjacent heat receiving pipes (4) are fixed by welding.

3. The converter flue gas waste heat boiler according to claim 1, characterized in that, The heat conducting plates (6) are fixed on the side of the heat receiving pipes (4) facing the inside of the middle section flue (3) by welding, and the cross section of the heat conducting plates (6) is arc-shaped structure matching the outer edge surface of the heat receiving pipes (4).

4. The converter flue gas waste heat boiler according to claim 1, characterized in that, The heat receiving pipes (4) are internally provided with heat transfer cylinders (7).

5. The converter flue gas waste heat boiler according to claim 4, characterized in that The inner wall of the heat transfer cylinder (7) is fixed with a plurality of heat transfer fins (701) facing the middle of the heat receiving pipes (4).

6. The converter flue gas waste heat boiler according to claim 5, characterized in that The heat transfer fins (701) are arranged along the length direction of the heat transfer cylinder (7).

7. The converter flue gas waste heat boiler according to claim 5, characterized in that The heat transfer fins (701) are provided with four, and are uniformly distributed on the inner wall of the heat transfer cylinder (7).

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