Biomass combustion furnace waste heat recovery device

Abstract

The utility model relates to waste heat recovery device technical field discloses a kind of waste heat recovery device of biomass combustion furnace exhaust gas, including air inlet bin, the air inlet bin is connected with air inlet flange, the air inlet bin is connected with exhaust flange, the air inlet bin inside is equipped with partition, the air inlet bin one side is connected with U-shaped displacement pipe, the U-shaped displacement pipe inside is equipped with U-shaped auxiliary pipe, the U-shaped auxiliary pipe inside is equipped with spring, the U-shaped auxiliary pipe inside is equipped with support rod, the U-shaped displacement pipe is fixedly connected with multiple support plate, the support plate is fixedly connected with support frame, the support plate is closely attached heat exchange bin;To guide the high-temperature gas inside U-shaped auxiliary pipe, and make it adhere to U-shaped auxiliary pipe inner wall, to increase the contact area of high-temperature gas, improve heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of waste gas waste heat recovery devices, specifically a waste gas waste heat recovery device for a biomass combustion furnace. Background Technology

[0002] Biomass combustion furnaces are widely used in heating, power generation and industrial heating fields due to their advantages such as renewability and low carbon emissions. While biomass fuels (such as wood chips, straw, rice husks, etc.) generate heat energy by burning in the combustion furnace, they also emit a large amount of high-temperature flue gas.

[0003] Existing waste heat recovery methods mainly utilize the thermal energy in waste gas, transferring it to the working medium, such as water or air, through a heat exchanger. This allows the medium to gain heat, which can then be used to preheat raw materials, heat domestic water, and produce steam, thus achieving energy reuse. Current methods involve heating the water by passing the waste gas through a displacement pipe. Traditional displacement pipes often use a fixed structure, such as a straight pipe. Due to the single gas flow pattern, the contact area between the high-temperature waste gas and the displacement pipe is limited, which in turn affects the area of ​​contact between the high-temperature waste gas and the water, resulting in low heat exchange efficiency.

[0004] Therefore, we propose a waste heat recovery device for biomass combustion furnace exhaust gas. Utility Model Content

[0005] The purpose of this utility model is to provide a waste heat recovery device for waste gas from a biomass combustion furnace, in order to solve the problem mentioned in the background art that the replacement pipes mostly adopt a fixed structure such as a straight pipe. Due to the single gas flow state, the contact area between the high-temperature waste gas and the replacement pipe is limited, which in turn affects the area contact between the high-temperature waste gas and water, resulting in low heat exchange efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery device for waste gas from a biomass combustion furnace, comprising an air inlet chamber, an air inlet flange connected to the air inlet chamber, an exhaust flange connected to the air inlet chamber, a partition plate inside the air inlet chamber, a U-shaped displacement pipe connected to one side of the air inlet chamber, a U-shaped auxiliary pipe inside the U-shaped displacement pipe, a spring inside the U-shaped auxiliary pipe, a support rod inside the U-shaped auxiliary pipe, multiple support plates fixedly connected to the U-shaped displacement pipe, a support frame fixedly connected to the support plates, and the support plates tightly fitting the heat exchange chamber.

[0007] Preferably, one end of the U-shaped auxiliary pipe is conical, and the conical end of the U-shaped auxiliary pipe is connected to the air intake flange.

[0008] Preferably, the other end of the U-shaped auxiliary pipe is connected to the exhaust flange, and the U-shaped auxiliary pipe is tightly pressed against the inner wall of the U-shaped replacement pipe by each spring and each support rod.

[0009] Preferably, the heat exchange chamber is connected to a water inlet flange and a drain flange.

[0010] Preferably, the heat exchange chamber is fixedly connected to the air inlet chamber, the heat exchange chamber is provided with multiple U-shaped displacement pipes inside, and the heat exchange chamber is provided with an auxiliary support frame on the outside.

[0011] Preferably, the heat exchange chamber is equipped with a support frame inside, and the support frame is fixedly connected to the air inlet chamber.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention features an air inlet chamber connected to multiple U-shaped displacement tubes. Inside each U-shaped displacement tube is a U-shaped auxiliary tube. Each auxiliary tube, through a spring and a support rod, tightly presses against the inner wall of the U-shaped displacement tube, thereby guiding the high-temperature gas entering the auxiliary tube and making it adhere to the inner wall of the auxiliary tube, thus increasing the contact area of ​​the high-temperature gas and improving the heat exchange efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal distribution structure of the heat exchange chamber of this utility model;

[0016] Figure 3 This is a schematic diagram of the overall structure of this utility model;

[0017] In the diagram: 1. Inlet chamber; 2. Inlet flange; 3. Exhaust flange; 4. Divider plate; 5. U-shaped replacement pipe; 6. U-shaped auxiliary pipe; 7. Spring; 8. Support rod; 9. Support plate; 10. Support frame; 11. Heat exchange chamber; 12. Water inlet flange; 13. Drain flange; 14. Auxiliary support frame. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example

[0020] Please see Figures 1-3The diagram illustrates a waste heat recovery device for biomass combustion furnace exhaust gas, comprising an inlet chamber 1, an inlet flange 2, an exhaust flange 3, a partition plate 4 inside the inlet chamber 1, a U-shaped displacement pipe 5 connected to one side of the inlet chamber 1, a U-shaped auxiliary pipe 6 inside the U-shaped displacement pipe 5, a spring 7 inside the U-shaped auxiliary pipe 6, and a support rod 8 inside the U-shaped auxiliary pipe 6. Multiple support plates 9 are fixedly connected to the U-shaped displacement pipe 5, and a support frame 10 is fixedly connected to the support plates 9. The support plates 9 are tightly fitted against the heat exchange chamber 11. This invention connects multiple U-shaped displacement pipes to the inlet chamber, with U-shaped auxiliary pipes inside each U-shaped displacement pipe. Each auxiliary pipe, through a spring and a support rod, tightly presses against the inner wall of the U-shaped displacement pipe, thereby guiding the high-temperature gas entering the U-shaped auxiliary pipe and ensuring it adheres to the inner wall of the U-shaped auxiliary pipe, thus increasing the contact area of ​​the high-temperature gas and improving heat exchange efficiency.

[0021] Furthermore, one end of the U-shaped auxiliary pipe 6 is conical, and the conical end of the U-shaped auxiliary pipe 6 is connected to the inlet flange 2. The conical end of the U-shaped auxiliary pipe tightly guides the incoming high-temperature gas through the U-shaped displacement pipe.

[0022] Furthermore, the other end of the U-shaped auxiliary pipe 6 is connected to the exhaust flange 3. The U-shaped auxiliary pipe 6 is tightly pressed against the inner wall of the U-shaped replacement pipe 5 by each spring 7 and each support rod 8, thus ensuring a stable connection between the U-shaped auxiliary pipe and the U-shaped replacement pipe.

[0023] Furthermore, the heat exchange chamber 11 is connected to a water inlet flange 12 and a drain flange 13. The connection between the water inlet flange and the drain flange ensures the stability of the heat exchange efficiency.

[0024] Furthermore, the heat exchange chamber 11 is fixedly connected to the air inlet chamber 1. The heat exchange chamber 11 is equipped with multiple U-shaped displacement pipes 5 inside, and an auxiliary support frame 14 is provided on the outside of the heat exchange chamber 11. The heat exchange chamber is fixedly connected to the air inlet chamber to ensure the stability of the heat exchange chamber seal and facilitate installation and disassembly.

[0025] Furthermore, a support frame 10 is provided inside the heat exchange chamber 11. The support frame 10 is fixedly connected to the air inlet chamber 1. The support frame ensures the stability of the U-shaped replacement pipe inside the heat exchange chamber.

[0026] In this scheme, the workflow is as follows: First, the exhaust gas enters the intake chamber 1 through the intake flange 2. Under the guidance of the dividing plate 4, the airflow is evenly distributed into two paths, which flow along the channels on both sides of the intake chamber 1 to the U-shaped replacement pipe 5. The U-shaped replacement pipe 5 performs heat exchange: After the exhaust gas enters the U-shaped replacement pipe 5, it exchanges heat with the heat exchange medium outside the pipe, such as water. The U-shaped auxiliary pipe 6 is nested inside the U-shaped replacement pipe 5. The U-shaped auxiliary pipe 6 can evenly adhere the airflow to the inner wall of the U-shaped replacement pipe 5, thereby improving the heat exchange efficiency.

[0027] Meanwhile, the U-shaped replacement pipe 5 is connected to multiple support plates 9, which are equidistantly distributed along the axial direction of the U-shaped replacement pipe 5 to ensure the fixation of the U-shaped replacement pipe 5. The heat exchange chamber 11 is wrapped around the outside of the U-shaped replacement pipe 5 and sealed and fixed by the tight fit of the support plates 9. The heat exchange medium circulates in the chamber, absorbs heat from the waste gas, and its temperature rises. Finally, it is output to the heat-using terminal through the liquid outlet. The low-temperature waste gas after heat exchange flows into the exhaust flange and is discharged through the exhaust flange 3. The recovered waste heat can be used to preheat biomass fuel, provide heating, or generate electricity, realizing the cascade utilization of energy.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A biomass combustion furnace exhaust gas waste heat recovery device, characterized by: It includes an air inlet chamber (1), which is connected to an air inlet flange (2) and an exhaust flange (3). The air inlet chamber (1) is provided with a partition plate (4). A U-shaped displacement pipe (5) is connected to one side of the air inlet chamber (1). A U-shaped auxiliary pipe (6) is provided inside the U-shaped displacement pipe (5). A spring (7) is provided inside the U-shaped auxiliary pipe (6). A support rod (8) is provided inside the U-shaped auxiliary pipe (6). Multiple support plates (9) are fixedly connected to the U-shaped displacement pipe (5). A support frame (10) is fixedly connected to the support plate (9). The support plate (9) is tightly fitted to the heat exchange chamber (11).

2. The biomass combustion boiler exhaust waste heat recovery device according to claim 1, characterized in that: One end of the U-shaped auxiliary pipe (6) is conical, and the conical end of the U-shaped auxiliary pipe (6) is connected to the air inlet flange (2).

3. The biomass combustion boiler exhaust heat recovery device according to claim 1, characterized in that: The other end of the U-shaped auxiliary pipe (6) is connected to the exhaust flange (3). The U-shaped auxiliary pipe (6) is tightly pressed against the inner wall of the U-shaped replacement pipe (5) by each spring (7) and each support rod (8).

4. The biomass combustion boiler exhaust gas waste heat recovery device according to claim 1, characterized in that: The heat exchange chamber (11) is connected to a water inlet flange (12), and the heat exchange chamber (11) is connected to a drain flange (13).

5. The biomass combustion boiler flue gas waste heat recovery device according to claim 4, characterized in that: The heat exchange chamber (11) is fixedly connected to the air inlet chamber (1). The heat exchange chamber (11) is provided with multiple U-shaped replacement pipes (5) inside and an auxiliary support frame (14) is provided on the outside of the heat exchange chamber (11).

6. The biomass combustion boiler flue gas waste heat recovery device according to claim 4, characterized in that: The heat exchange chamber (11) is equipped with a support frame (10), which is fixedly connected to the air inlet chamber (1).

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