Boiler flue waste heat recovery structure

Abstract

The utility model discloses a boiler flue waste heat recovery structure in the technical field of boiler flue gas waste heat recovery, and the boiler flue waste heat recovery structure comprises a plurality of recovery plates and a water pipe, the middle of each recovery plate is hollow, a plurality of grooves are formed in the two opposite sides of each recovery plate, the water pipe is a bendable coiled pipe, and the water pipe is sequentially connected in the grooves in a coiled mode. The multiple recovery plates are horizontally and vertically arranged, and the water pipes between the multiple recovery plates are arranged in a staggered mode. Through the matching design of the circulating water pipe and the recovery plate, the contact area of the flue gas and the heat exchange medium is increased, so that the heat in the flue gas can be more fully absorbed and utilized.

Description

Technical Field

[0001] This utility model relates to the field of boiler flue gas waste heat recovery technology, specifically to a boiler flue waste heat recovery structure. Background Technology

[0002] In the field of boiler flue gas recovery technology, traditional flue gas recovery structures mostly adopt straight pipes or simple curved pipe structures. Straight pipe structures are widely used in flue gas recovery systems due to their simplicity and ease of installation. However, with the increasing demands for energy conservation and emission reduction in industry, the drawbacks of straight pipe structures have gradually become apparent. To overcome the shortcomings of straight pipe structures, some technologies have adopted simple curved pipe structures, increasing the contact area between the flue gas and the heat exchange medium by increasing the length and curvature of the pipe, thereby improving heat recovery efficiency.

[0003] Although the curved pipe structure increases the contact area, the flow state of the flue gas within the pipe is not ideal due to the limitations of the bending angle and layout, resulting in limited improvement in heat exchange efficiency. The curved pipe structure easily generates eddies in the flue gas during flow, increasing flow resistance, which not only affects the smooth discharge of flue gas but may also adversely affect the operation of the boiler. Secondly, the complex curved pipe structure increases the difficulty of system installation and subsequent maintenance costs. Frequent disassembly and cleaning are not only time-consuming and labor-intensive but may also affect the normal operation of the system. Utility Model Content

[0004] The present invention aims to provide a solution to the problem that existing boiler flue gas recovery devices have fixed pipe arrangements during heat recovery, resulting in a short heat exchange time for boiler flue gas and a low utilization rate of flue gas heat.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a boiler flue waste heat recovery structure, including multiple recovery plates and water pipes. The recovery plates are hollow in the middle and have multiple grooves on opposite sides. The water pipes are flexible serpentine pipes and are coiled and connected in the multiple grooves in sequence. The multiple recovery plates are arranged horizontally and vertically, and the water pipes between the multiple recovery plates are staggered.

[0006] The working principle of this utility model is as follows: Multiple recovery plates are arranged horizontally and vertically, with the water pipes between adjacent recovery plates staggered. The multiple recovery plates are located within the recovery device. At this time, boiler flue gas enters between the multiple recovery plates through the flue. Circulating water or tap water flows through the water pipes, and the boiler flue gas undergoes heat exchange. Due to the staggered arrangement of the water pipes, the flow path of the boiler flue gas is diverted, greatly increasing the contact time between the boiler flue gas and the surface of the water pipes, thereby increasing the heat exchange time of the boiler flue gas and improving the heat recovery and utilization rate of the boiler flue gas.

[0007] The beneficial effects of this utility model are as follows: 1. The serpentine circulating water pipe design greatly increases the contact area between flue gas and the heat exchange medium, allowing the heat in the flue gas to be absorbed and utilized more fully. Compared with the traditional structure, the heat recovery efficiency of this utility model is significantly improved. 2. Through the layout of the serpentine circulating water pipe, this utility model optimizes the flow path of the flue gas, reduces the generation of eddies, and lowers flow resistance. This not only helps the smooth discharge of flue gas but also improves the overall operating efficiency of the system. 3. The serpentine circulating water pipe, coiled and connected within multiple grooves of the recovery plate, enhances the stability and durability of the entire recovery structure. This structure can withstand greater flue gas pressure and temperature fluctuations, improving the safety and service life of the equipment. 4. The structural design of this utility model is simple and clear, facilitating installation and maintenance. Compared with traditional complex pipe structures, this utility model eliminates the need for frequent disassembly and cleaning during later maintenance, greatly reducing maintenance costs and workload.

[0008] Furthermore, the grooves between adjacent recycling plates are vertically staggered. This staggered arrangement of the grooves further limits the misalignment distance between the water pipes.

[0009] Furthermore, the adjacent water pipes are coiled in opposite directions within the multiple grooves. This different coiling direction ensures that the bends between adjacent water pipes are also staggered, further slowing the flow rate of the boiler flue gas and increasing the heat exchange time.

[0010] Furthermore, the surface of the water pipe is corrugated. This surface design increases the contact area between the boiler flue gas and the water pipe.

[0011] Furthermore, a gap is left between adjacent recovery plates. This gap allows the boiler flue gas to briefly remain within the gap for heat exchange after entering it.

[0012] Furthermore, the depth of the groove is the same as the diameter of the water pipe. By ensuring that the diameter of the water pipe matches the depth of the groove, the water pipe can be connected to the groove more tightly. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a boiler flue waste heat recovery structure according to the present invention.

[0014] Figure 2 This is a top view schematic diagram of a boiler flue waste heat recovery structure according to the present invention;

[0015] Figure 3 This is a front sectional view of a boiler flue waste heat recovery structure according to the present invention;

[0016] Figure 4 for Figure 2 The flow path of the waste heat flue gas. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation method:

[0018] The reference numerals in the accompanying drawings include: recycling plate 1, water pipe 2.

[0019] The basic implementation examples are as follows: Figure 1 -Appendix Figure 4 As shown: A waste heat recovery structure for boiler flue includes two recovery plates 1 and water pipes 2. The recovery plates 1 are hollow in the middle and have grooves on both the upper and lower sides. There is a gap between the two recovery plates 1. The two recovery plates 1 are arranged vertically in a horizontal manner. The vertical positions of the grooves between the two recovery plates 1 are staggered. The water pipes 2 are flexible serpentine pipes with corrugated surfaces. The diameter of the water pipes 2 is the same as the depth of the grooves. The water pipes 2 are coiled and slidably connected in the grooves in sequence. The coiling directions of the two water pipes 2 are opposite, and the cross-sections of the two water pipes 2 are staggered.

[0020] The specific implementation process is as follows: When the boiler is running, the flue gas enters the recovery structure through the flue. The flue gas flows between multiple recovery plates 1. Due to the staggered arrangement and opposite winding direction of the water pipes 2, the flow path of the flue gas is "blocked," increasing the residence time of the flue gas in the recovery structure. At the same time, circulating water or tap water flows through the water pipes 2, exchanging heat with the flue gas. Because the surface of the water pipes 2 is corrugated, the contact area with the flue gas is increased, further improving the heat exchange efficiency. Through heat exchange, the heat in the flue gas is transferred to the water in the water pipes 2. The water after heat exchange can be transported through pipelines to other systems for use, such as heating and hot water supply.

[0021] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A waste heat recovery structure for boiler flue gas, characterized in that: It includes multiple recycling plates and water pipes. The recycling plates have a hollow center and multiple grooves on opposite sides. The water pipes are flexible serpentine pipes that are coiled and connected to the multiple grooves in sequence. The multiple recycling plates are arranged horizontally and vertically, and the water pipes between the multiple recycling plates are staggered.

2. The boiler flue waste heat recovery structure according to claim 1, characterized in that: The grooves between adjacent recycling plates are vertically offset.

3. The boiler flue waste heat recovery structure according to claim 2, characterized in that: The adjacent water pipes are coiled in opposite directions within the multiple grooves.

4. The boiler flue waste heat recovery structure according to claim 3, characterized in that: The surface of the water pipe is corrugated.

5. The boiler flue waste heat recovery structure according to claim 4, characterized in that: A gap is left between adjacent recycling plates.

6. The boiler flue waste heat recovery structure according to claim 5, characterized in that: The depth of the groove is the same as the diameter of the water pipe.

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