Waste gas circulation waste heat utilization device for magnesia carbon brick drying kiln

Abstract

The utility model relates to the technical field of waste gas waste heat utilization devices, in particular to a waste gas circulation waste heat utilization device for a magnesia carbon brick drying kiln, which comprises a drying kiln, the top end of the drying kiln is communicated with a transfer pipe, one end of the transfer pipe is communicated with an air inlet frame, and one end of the air inlet frame is communicated with a connecting plate and a heat exchange assembly. The air inlet frame comprises a frame body and a front filter plate fixed to the inner side of the outer portion of the frame body, a rear filter plate is fixed to the middle of the connecting plate, the heat exchange assembly comprises a heat exchange frame and a heat exchange pipe arranged in the heat exchange frame, a gas outlet is formed in the other end of the heat exchange frame, and when the heat exchange assembly is used, heat in high-heat gas can be absorbed step by step till the gas is exhausted. The spiral heat exchange pipe structure is arranged in each heat exchange assembly and connected with the external pipeline, so that a medium can continuously enter the heat exchange frame to absorb heat in high-heat gas, and compared with an existing structure, the heat absorption effect and the heat conversion efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of waste gas waste heat utilization devices, specifically to a waste gas circulation waste heat utilization device for a magnesia-carbon brick drying kiln. Background Technology

[0002] Magnesia-carbon bricks are widely used as an important refractory material in high-temperature industrial production processes such as steel and non-ferrous metal smelting. During the production process, magnesia-carbon bricks require drying in a drying kiln to remove moisture and ensure product quality.

[0003] Traditional magnesia-carbon brick drying kilns generate large amounts of high-temperature waste gas during operation, which is typically released directly into the atmosphere. On the one hand, the significant heat carried by the waste gas is wasted, undoubtedly resulting in substantial energy loss and increasing production costs for enterprises. On the other hand, the direct emission of high-temperature waste gas also causes thermal pollution to the surrounding environment, impacting ecological quality. With increasingly stringent global requirements for energy conservation, emission reduction, and environmental protection, how to efficiently utilize the waste heat generated by magnesia-carbon brick drying kilns has become a critical issue urgently needing to be addressed in the industry. Developing a waste heat recycling device for magnesia-carbon brick drying kilns is of significant practical importance for improving energy efficiency, reducing production costs, and minimizing environmental pollution. Utility Model Content

[0004] Technical problems to be solved

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a waste heat recovery device for waste gas circulation in magnesia-carbon brick drying kilns, which can effectively solve the problems in the existing technology.

[0006] Technical solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] This utility model provides a waste heat recovery device for waste gas circulation in a magnesia-carbon brick drying kiln, including a drying kiln. The top of the drying kiln is connected to a transfer pipe, one end of the transfer pipe is connected to an air inlet frame, and one end of the air inlet frame is connected to a connecting plate and a heat exchange assembly. The air inlet frame includes a frame body and a front filter plate fixed to the inner side of the frame body. A rear filter plate is fixed in the middle of the connecting plate. The heat exchange assembly includes a heat exchange frame and a heat exchange tube disposed in the heat exchange frame. A gas outlet is opened at the other end of the heat exchange frame.

[0009] Furthermore, the heat exchange frames are arranged in multiple equidistant arrays, and the heat exchange tubes within the heat exchange frames are spiral coil structures.

[0010] Furthermore, both ends of the heat exchange tube are kept in communication with external pipes, and the outer side of the heat exchange tube is fixed to the outer side of the heat exchange frame by a positioning bracket.

[0011] Furthermore, the mesh count of the rear filter plate is greater than that of the front filter plate.

[0012] Furthermore, multiple sets of casters are fixed to the bottom end of the heat exchange frame.

[0013] Furthermore, the frame is a hollow trapezoidal frame structure, and a central groove is provided in the middle of the connecting plate, and the rear filter plate is fixed in the central groove.

[0014] Beneficial effects

[0015] The technical solution provided by this utility model has the following advantages compared with the known public technology:

[0016] This invention utilizes a structure consisting of a transfer pipe, an air inlet frame, a connecting plate, and heat exchange components. High-temperature waste heat within the drying kiln is collected to one side via the transfer pipe, then slowed and gathered by the frame structure. The gas is then filtered twice, through a front filter plate and a rear filter plate, removing any trapped particulate matter. The gas then enters multiple sets of heat exchange components via the connecting plate. Multiple sets of heat exchange frames are arranged before and after the gas, allowing for the gradual absorption of heat from the high-temperature gas until the gas is discharged. Each heat exchange component contains a spiral heat exchange tube structure connected to an external pipe, ensuring a continuous flow of medium to absorb heat from the high-temperature gas. Compared to existing structures, this design improves heat absorption and conversion efficiency. Attached Figure Description

[0017] 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is an exploded view of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the heat exchange component in this utility model;

[0021] Figure 4 This is a cross-sectional view of the heat exchange component in this utility model.

[0022] The labels in the diagram represent: 1. Drying kiln; 2. Transfer pipe; 3. Air inlet frame; 31. Frame body; 32. Front filter plate; 4. Connecting plate; 41. Rear filter plate; 42. Middle tank; 5. Heat exchange assembly; 51. Heat exchange frame; 52. Heat exchange tube; 53. Positioning frame; 54. Casters; 55. Gas outlet. Detailed Implementation

[0023] 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, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] The present invention will be further described below with reference to the embodiments.

[0025] Example: A waste heat recovery device for waste gas circulation in a magnesia-carbon brick drying kiln, as shown in the attached document. Figure 1 - Appendix Figure 4 The system includes a drying kiln 1, the top of which is connected to a transfer pipe 2, one end of which is connected to an air inlet frame 3, one end of which is connected to a connecting plate 4 and a heat exchange assembly 5. The air inlet frame 3 includes a frame body 31 and a front filter plate 32 fixed to the inner side of the frame body 31. A rear filter plate 41 is fixed in the middle of the connecting plate 4. The heat exchange assembly 5 includes a heat exchange frame 51 and a heat exchange tube 52 disposed in the heat exchange frame 51. A gas outlet 55 is provided at the other end of the heat exchange frame 51.

[0026] The heat exchange frame 51 is arranged in multiple sets at equal intervals, and the heat exchange tube 52 is a spiral coil structure inside the heat exchange frame 51.

[0027] Both ends of the heat exchange tube 52 are connected to external pipes, and the outer side of the heat exchange tube 52 is fixed to the outer side of the heat exchange frame 51 by a positioning bracket 53; the mesh size of the rear filter plate 41 is greater than that of the front filter plate 32; multiple sets of universal wheels 54 are fixed to the bottom of the heat exchange frame 51; the frame 31 is a hollow trapezoidal frame structure, and a central groove 42 is provided in the middle of the connecting plate 4, and the rear filter plate 41 is fixed in the central groove 42; through the structure of the transfer pipe 2-air inlet frame 3-connecting plate 4-heat exchange assembly 5, the high-temperature waste heat in the drying kiln 1 can be collected to one side through the transfer pipe 2, and the heat can be reduced by the structure of the frame 31. The gas is rapidly collected and sequentially passes through the front filter plate 32 and the rear filter plate 41, where it undergoes two filtrations to remove any interceptable particulate matter. The gas then enters multiple sets of heat exchange components 5 through the connecting plate 4. Multiple sets of heat exchange frames 51 are arranged before and after the heat exchange components 5, allowing them to absorb heat from the high-temperature gas in stages until the gas is discharged. Each heat exchange component 5 is equipped with a spiral heat exchange tube 52 structure connected to an external pipe, ensuring a continuous flow of medium into the heat exchange frame 51 to absorb heat from the high-temperature gas. Compared to existing structures, this improves the heat absorption effect and heat conversion efficiency.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this 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 of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A waste gas recycling and waste heat utilization device for a magnesia-carbon brick drying kiln, characterized in that, The equipment includes a drying kiln (1), the top of which is connected to a transfer pipe (2), one end of which is connected to an air inlet frame (3), one end of which is connected to a connecting plate (4) and a heat exchange assembly (5). The air inlet frame (3) includes a frame body (31) and a front filter plate (32) fixed to the inner side of the frame body (31). A rear filter plate (41) is fixed in the middle of the connecting plate (4). The heat exchange assembly (5) includes a heat exchange frame (51) and a heat exchange tube (52) disposed in the heat exchange frame (51). A gas outlet (55) is provided at the other end of the heat exchange frame (51).

2. The waste gas recycling and waste heat utilization device for a magnesia-carbon brick drying kiln according to claim 1, characterized in that, The heat exchange frame (51) is arranged in multiple sets at equal intervals, and the heat exchange tube (52) is a spiral coil structure inside the heat exchange frame (51).

3. The waste gas recycling and waste heat utilization device for a magnesia-carbon brick drying kiln according to claim 1, characterized in that, Both ends of the heat exchange tube (52) are connected to the external pipe, and the outer side of the heat exchange tube (52) is fixed to the outer side of the heat exchange frame (51) by the positioning bracket (53).

4. The waste gas recycling and waste heat utilization device for a magnesia-carbon brick drying kiln according to claim 1, characterized in that, The mesh count of the rear filter plate (41) is greater than that of the front filter plate (32).

5. The waste gas recycling and waste heat utilization device for a magnesia-carbon brick drying kiln according to claim 4, characterized in that, The bottom end of the heat exchange frame (51) is fixed with multiple sets of casters (54).

6. The waste gas recycling and waste heat utilization device for a magnesia-carbon brick drying kiln according to claim 1, characterized in that, The frame (31) is a hollow trapezoidal frame structure, and a central groove (42) is provided in the middle of the connecting plate (4), and the rear filter plate (41) is fixed in the central groove (42).

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