Low-concentration gas oxidation heat supply system heat energy cascade utilization device

Abstract

The utility model relates to low concentration gas oxidation heat source utilization technical field discloses the heat energy cascade utilization device of low concentration gas oxidation heat supply system, including the reaction kettle body, the trapezoidal heat source utilization mechanism includes the primary heat source guide tube, the outside fixed connection of primary heat source guide tube is in the inside of top cover, the inside fixed connection of reaction kettle body has the water inlet, the inside fixed connection of reaction kettle body has the water outlet, the one end fixed connection of water inlet in the inside of reaction kettle body has the heat exchange pipe. In the utility model, the high temperature air that low concentration gas carries out oxidation reaction produces as primary heat source under the guidance of primary heat source guide tube and flows to the heat power generation device outside, and the heat absorption solution feed port is as the feed port of heat absorption liquid, makes the heat absorption liquid flow to the cavity that reaction kettle body's inside and the outside of heat conduction block composition absorbs the heat source.

Description

Technical Field

[0001] This utility model relates to the field of low-concentration gas oxidation heat source utilization technology, and in particular to a heat energy cascade utilization device for a low-concentration gas oxidation heating system. Background Technology

[0002] A low-concentration gas oxidation system is a system that utilizes low-concentration gas (such as coal mine gas, natural gas, etc.) through an oxidation reaction to convert it into heat or electricity. This system uses technologies such as catalytic oxidation to enable efficient combustion of gas even at low concentrations, reducing emissions and providing a stable energy supply. A low-concentration gas oxidation heating system uses the heat generated by this oxidation reaction for heating, particularly effective as a substitute for traditional energy sources in areas far from major energy sources. The connection to this system lies in its multi-stage heat recovery and utilization, achieving efficient heat utilization and maximizing resources, thus enhancing the overall efficiency of the energy system.

[0003] The working principle of a thermal energy cascade utilization device is to utilize waste heat at different temperatures in stages through multi-stage heat exchange and energy recovery, gradually converting it into usable thermal energy. This device typically includes different heat sources such as high-temperature, medium-temperature, and low-temperature heat sources, and achieves multi-level conversion and utilization of thermal energy by setting up different heat exchangers or heat recovery units. For example, high-temperature waste heat is first used to drive power generation or provide high-temperature steam, medium-temperature waste heat can be used for heating, hot water, or industrial heating, while low-temperature waste heat can be used for heating, preheating, and other purposes. In this way, through thermal energy cascade utilization, not only is energy utilization efficiency improved, but energy waste and environmental pollution are also reduced. In summary, thermal energy cascade utilization devices improve the overall efficiency of energy utilization by rationally configuring and optimizing the utilization of low, medium, and high-temperature waste heat.

[0004] In existing technologies, some heat energy cascade utilization devices in low-concentration gas oxidation heating systems primarily focus on utilizing the high-temperature, high-pressure air generated by the oxidation reaction, neglecting the heat source generated by the reaction itself within the reactor. This approach results in the ineffective utilization of heat energy within the reactor, leading to a decrease in the overall system's heat energy utilization rate. In fact, the heat energy in the reactor can also be utilized in a cascade manner through appropriate heat recovery devices, such as heat exchangers or cooling systems, thereby improving the system's heat energy recovery efficiency. By comprehensively recovering and rationally utilizing various heat sources generated in the reactor and oxidation reaction, the energy utilization efficiency of the entire low-concentration gas oxidation heating system can be significantly improved. Therefore, a heat energy cascade utilization device for low-concentration gas oxidation heating systems is proposed to address the aforementioned issues. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a heat energy cascade utilization device for a low-concentration gas oxidation heating system. It aims to improve the problem that some existing low-concentration gas oxidation heating systems only utilize the high-temperature and high-pressure air generated by the oxidation reaction as a heat source, but lack the utilization of the heat source generated in the reaction vessel, thereby reducing the final heat source utilization rate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a heat energy cascade utilization device for a concentration gas oxidation heating system, comprising a reaction vessel body, a top cover rotatably connected to the top of the reaction vessel body, a trapezoidal heat source utilization mechanism fixedly connected inside the reaction vessel body and inside the top cover, a heat-conducting block fixedly connected inside the reaction vessel body, and a replaceable reaction source mechanism slidably connected inside the heat-conducting block.

[0007] The trapezoidal heat source utilization mechanism includes a primary heat source conduit, which is externally and fixedly connected to the inside of the top cover. An inlet is fixedly connected to the inside of the reactor body, and an outlet is fixedly connected to the inside of the reactor body. A heat exchange tube is fixedly connected to one end of the inlet inside the reactor body, and the other end of the heat exchange tube is fixedly connected to one end of the outlet inside the reactor body. A heat-absorbing solution inlet is fixedly connected to the inside of the reactor body, and a heat-absorbing solution outlet is fixedly connected to the inside of the reactor body. A heat source recovery component is fixedly connected to the inside of the outlet.

[0008] As a further description of the above technical solution: the replaceable reaction source mechanism includes a mounting shaft, the outside of which is slidably connected to the inside of the heat-conducting block, and a plurality of catalyst blocks are fixedly connected inside the mounting shaft. The plurality of catalyst blocks are arranged in triangles and spliced ​​together inside the mounting shaft. A plurality of support blocks are fixedly connected inside the heat-conducting block, and the top of the support blocks is in contact with the bottom of the mounting shaft.

[0009] As a further description of the above technical solution: the heat source recovery assembly includes multiple conduit fixing brackets, the external of the multiple conduit fixing brackets is fixedly connected to the inside of the heat exchange tube, a circular through hole is provided between the conduit fixing brackets and the inner wall of the heat exchange tube, and a secondary heat source conduit is fixedly connected inside the circular through hole;

[0010] As a further description of the above technical solution: an air inlet is fixedly connected to the inside of the reactor body, the outside of the air inlet is fixedly connected to the inside of the heat-conducting block, a low-concentration gas inlet is fixedly connected to the inside of the reactor body, and two sealing rings are fixedly connected to the outside of both the air inlet and the low-concentration gas inlet, with the adjacent side of the two sealing rings tightly fitted to the inner and outer walls of the reactor body;

[0011] As a further description of the above technical solution: a support leg is fixedly connected to the bottom of the reactor body, and the bottom of the support leg adopts a funnel-shaped block;

[0012] As a further description of the above technical solution: a cavity is provided between the outside of the heat-conducting block and the inside of the reactor body, one end of the air inlet and one end of the low-concentration gas inlet are both located inside the cavity, and the outside of the heat exchange tube is fixedly connected to the inside of the cavity;

[0013] As a further description of the above technical solution: the top cover adopts a T-shaped design, and the bottom outer side of the top cover is in contact with the inner wall of the heat-conducting block;

[0014] As a further description of the above technical solution: the height of the heat-absorbing solution inlet and the water inlet is higher than the height of the water outlet and the heat-absorbing solution outlet.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, the high-temperature air generated by the oxidation reaction of low-concentration methane serves as a primary heat source, flowing to the external heat power generation device under the guidance of the primary heat source conduit. The heat-absorbing solution inlet serves as the inlet for the heat-absorbing liquid, allowing the heat-absorbing liquid to flow into the cavity formed by the interior of the reactor body and the exterior of the heat-conducting block to absorb the heat source. Then, the heat-absorbing liquid serves as a secondary heat source, flowing out of the reactor body under the guidance of the heat-absorbing solution outlet. Subsequently, water flows to the heat exchange tube through the water inlet, absorbing the heat source in the heat-absorbing liquid through insulation, and then serves as a tertiary heat source. Finally, it flows out of the device through the water outlet. The secondary heat source conduit, fixed inside the heat exchange tube by the conduit fixing bracket, serves as the least significant heat source. Through the multi-stage heat source absorption method, the utilization rate of the heat source generated by the heating system is improved.

[0017] 2. In this utility model, the mounting shaft, which is slidably connected to the heat-conducting block by the support block, is connected to the triangular internal skeleton formed by the stacking of internal catalyst blocks. This not only increases the contact area between the catalyst and the low-concentration gas, but also ensures the stability between the catalyst blocks. At the same time, the sliding connection method facilitates the subsequent replacement of the catalyst blocks and the mounting shaft, thereby improving the practicality of the device. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the heat energy cascade utilization device of the low-concentration gas oxidation heating system proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the conduit fixing frame of the heat energy cascade utilization device for the low-concentration gas oxidation heating system proposed in this utility model.

[0020] Figure 3 This is a schematic diagram of the heat absorption solution inlet of the heat energy cascade utilization device of the low-concentration gas oxidation heating system proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the catalyst block in the thermal energy cascade utilization device of the low-concentration gas oxidation heating system proposed in this utility model.

[0022] Legend:

[0023] 1. Reactor body; 2. Top cover; 3. Air inlet; 4. Low-concentration gas inlet; 5. Sealing ring; 6. Primary heat source conduit; 7. Endothermic solution inlet; 8. Endothermic solution outlet; 9. Water inlet; 10. Water outlet; 11. Heat exchange tube; 12. Heat-conducting block; 13. Secondary heat source conduit; 14. Conduit fixing bracket; 15. Mounting shaft; 16. Catalyst block; 17. Support block; 18. Support leg. Detailed Implementation

[0024] 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.

[0025] Reference Figures 1 to 3This utility model provides an embodiment of a heat energy cascade utilization device for a low-concentration gas oxidation heating system, comprising a reactor body 1, which is the core part of the system and is responsible for containing the reaction process. A top cover 2 is rotatably connected to the top of the reactor body 1, and the rotatable connection between the top cover 2 and the reactor body 1 facilitates maintenance and cleaning. During the reaction process, the top cover 2 not only serves a sealing function, but also enhances stability through its T-shaped design, preventing gas and hot gas leakage. A trapezoidal heat source utilization mechanism is fixedly connected inside the reactor body 1 and the top cover 2. The trapezoidal heat source utilization mechanism is a key heat energy recovery system located inside the reactor body 1 and the top cover 2. Its main function is to recover the heat energy generated during the reaction process. A heat-conducting block 12 is fixedly connected inside the reactor body 1. The heat-conducting block 12 is fixed inside the reactor body 1 and helps to conduct heat energy inside the reactor through good thermal conductivity. A replaceable reaction source mechanism is slidably connected inside the heat-conducting block 12. A support leg 18 is fixedly connected to the bottom of the reactor body 1. The support leg 18 is located at the bottom of the reactor body 1 and provides stable support. The bottom of the support leg 18 adopts a funnel-shaped block. The top cover 2 adopts a T-shaped design. The bottom outer side of the top cover 2 is in contact with the inner wall of the heat-conducting block 12.

[0026] The trapezoidal heat source utilization mechanism includes a primary heat source conduit 6, which is externally and fixedly connected to the inside of the top cover 2. An inlet 9 and an outlet 10 are fixedly connected internally to the reactor body 1. A heat exchange tube 11 is fixedly connected to one end of the inlet 9 inside the reactor body 1. The main function of the heat exchange tube 11 is to exchange heat between the cooling water introduced through the inlet 9 and the heat source inside the reactor, thereby achieving heat recovery and cascade utilization. The other end of the heat exchange tube 11... A heat-absorbing solution inlet 7 and a heat-absorbing solution outlet 8 are fixedly connected inside the reactor body 1. The heat-absorbing solution inlet 7 and the heat-absorbing solution outlet 8 are fixedly connected inside the reactor body 1. The heat-absorbing solution inlet 7 and the heat-absorbing solution outlet 8 are responsible for guiding the heat-absorbing solution into and out of the reactor to ensure effective absorption of heat energy. A heat source recovery component is fixedly connected inside the outlet 10. The height of the heat-absorbing solution inlet 7 and the inlet 9 is higher than the height of the outlet 10 and the heat-absorbing solution outlet 8.

[0027] The heat source recovery assembly includes multiple conduit fixing brackets 14, which are externally fixed to the inside of the heat exchange tube 11. A circular through hole is provided between the conduit fixing bracket 14 and the inner wall of the heat exchange tube 11, and a secondary heat source conduit 13 is fixedly connected inside the circular through hole.

[0028] Reference Figures 2 to 4The replaceable reaction source mechanism includes a mounting shaft 15, which is externally slidably connected to the interior of a heat-conducting block 12. Multiple catalyst blocks 16 are fixedly connected inside the mounting shaft 15. The catalyst blocks 16 promote the gas oxidation reaction during the reaction. Each catalyst block 16 is fixed to the mounting shaft 15 in a triangular splicing manner, ensuring the uniformity and efficiency of the catalytic reaction. The sliding design of the mounting shaft 15 facilitates the replacement of the catalyst blocks 16, thereby improving the system's adaptability and maintainability. Multiple catalyst blocks 16 are arranged in triangular splices inside the mounting shaft 15. Multiple support blocks 17 are fixedly connected inside the heat-conducting block 12, with the top of the support blocks 17 contacting the bottom of the mounting shaft 15.

[0029] An air inlet 3 is fixedly connected to the inside of the reactor body 1. The air inlet 3 is fixedly connected to the inside of the heat-conducting block 12. A low-concentration gas inlet 4 is also fixedly connected to the inside of the reactor body 1. The design of the air inlet 3 and the low-concentration gas inlet 4 allows air and gas to enter the reactor through the protection of the sealing ring 5. The sealing ring 5 can prevent gas leakage and ensure the stability of gas flow and reaction conditions in the reactor. Two sealing rings 5 ​​are fixedly connected to the outside of both the air inlet 3 and the low-concentration gas inlet 4. The adjacent sides of the two sealing rings 5 ​​are tightly fitted to the inner and outer walls of the reactor body 1. A cavity is provided between the outside of the heat-conducting block 12 and the inside of the reactor body 1. The cavity design between the reactor body 1 and the heat-conducting block 12 provides sufficient space to accommodate the air inlet pipe and the heat exchange pipe 11. This cavity facilitates uniform fluid flow and heat exchange, further optimizing the heat source recovery efficiency. One end of the air inlet 3 and the low-concentration gas inlet 4 are both located inside the cavity, and the heat exchange tube 11 is externally fixedly connected to the inside of the cavity.

[0030] Working principle: The high-temperature air generated by the oxidation reaction of low-concentration gas serves as the primary heat source and flows to the external heat power generation device under the guidance of the primary heat source conduit 6. The heat-absorbing solution inlet 7 serves as the inlet for the heat-absorbing liquid, allowing the heat-absorbing liquid to flow into the cavity formed by the interior of the reactor body 1 and the exterior of the heat-conducting block 12 to absorb the heat source. Then, the heat-absorbing liquid, as the secondary heat source, flows out of the interior of the reactor body 1 under the guidance of the heat-absorbing solution outlet 8. After that, water flows to the heat exchange tube 11 through the water inlet 9, absorbs the heat source in the heat-absorbing liquid through insulation, and then serves as the tertiary heat source. Finally, it flows out of the device through the water outlet 10. The secondary heat source conduit 13, which is fixed inside the heat exchange tube 11 by the conduit fixing bracket 14, serves as the least secondary heat source. Through the multi-stage heat source absorption method, the utilization rate of the heat source generated by the heating system is improved.

[0031] Low-concentration gas enters the interior of the heat-conducting block 12 through the low-concentration gas inlet 4, while oxygen enters the interior of the heat-conducting block 12 through the air inlet 3. The design of separate flow of low-concentration gas and oxygen increases the primary reaction capacity and the reaction rate. The sealing rings 5 ​​fixed to the outside of the air inlet 3 and the low-concentration gas inlet 4 reduce the risk of leakage by tightly fitting with the inner and outer walls of the reactor body 1.

[0032] The mounting shaft 15, which is slidably connected to the heat-conducting block 12 by the support block 17, forms a triangular internal skeleton composed of layers of internal catalyst blocks 16. This not only increases the contact area between the catalyst and low-concentration methane but also ensures the stability between the catalyst blocks 16. At the same time, the sliding connection method facilitates the subsequent replacement of the catalyst blocks 16 and the mounting shaft 15, thereby improving the practicality of the device.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-concentration gas oxidation heat supply system heat energy cascade utilization device, comprising a reaction kettle body (1), characterized in that: The top of the reactor body (1) is rotatably connected to a top cover (2). A trapezoidal heat source utilization mechanism is fixedly connected inside the reactor body (1) and inside the top cover (2). A heat-conducting block (12) is fixedly connected inside the reactor body (1). A replaceable reaction source mechanism is slidably connected inside the heat-conducting block (12). The trapezoidal heat source utilization mechanism includes a primary heat source conduit (6), the outside of which is fixedly connected to the inside of the top cover (2). The inside of the reactor body (1) is fixedly connected to a water inlet (9) and a water outlet (10). One end of the water inlet (9) inside the reactor body (1) is fixedly connected to a heat exchange tube (11), and the other end of the heat exchange tube (11) is fixedly connected to one end of the water outlet (10) inside the reactor body (1). The inside of the reactor body (1) is fixedly connected to a heat-absorbing solution inlet (7) and a heat-absorbing solution outlet (8). The inside of the water outlet (10) is fixedly connected to a heat source recovery component.

2. The low-concentration gas oxidation heat supply system heat energy cascade utilization device according to claim 1, characterized in that: The replaceable reaction source mechanism includes a mounting shaft (15), which is externally slidably connected to the interior of the heat-conducting block (12). Multiple catalyst blocks (16) are fixedly connected inside the mounting shaft (15). The multiple catalyst blocks (16) are arranged in triangles and spliced ​​inside the mounting shaft (15). Multiple support blocks (17) are fixedly connected inside the heat-conducting block (12). The top of the support block (17) is in contact with the bottom of the mounting shaft (15).

3. The heat energy cascade utilization device of the low-concentration gas oxidation heating system according to claim 1, characterized in that: The heat source recovery assembly includes multiple conduit holders (14), the external of which is fixedly connected to the inside of the heat exchange tube (11). A circular through hole is provided between the conduit holder (14) and the inner wall of the heat exchange tube (11), and a secondary heat source conduit (13) is fixedly connected inside the circular through hole.

4. The heat energy cascade utilization device of the low-concentration gas oxidation heating system according to claim 1, characterized in that: An air inlet (3) is fixedly connected inside the reactor body (1). The air inlet (3) is fixedly connected outside the heat-conducting block (12). A low-concentration gas inlet (4) is fixedly connected inside the reactor body (1). Two sealing rings (5) are fixedly connected outside both the air inlet (3) and the low-concentration gas inlet (4). The adjacent side of the two sealing rings (5) is tightly fitted to the inner and outer walls of the reactor body (1).

5. The heat energy cascade utilization device for the low-concentration gas oxidation heating system according to claim 1, characterized in that: The bottom of the reactor body (1) is fixedly connected to a support leg (18), and the bottom of the support leg (18) is a funnel-shaped block.

6. The heat energy cascade utilization device for the low-concentration gas oxidation heating system according to claim 4, characterized in that: A cavity is provided between the outside of the heat-conducting block (12) and the inside of the reactor body (1). One end of the air inlet (3) and the low-concentration gas inlet (4) are both located inside the cavity. The outside of the heat exchange tube (11) is fixedly connected to the inside of the cavity.

7. The heat energy cascade utilization device for the low-concentration gas oxidation heating system according to claim 1, characterized in that: The top cover (2) adopts a T-shaped design, and the bottom outer side of the top cover (2) is in contact with the inner wall of the heat-conducting block (12).

8. The heat energy cascade utilization device of the low-concentration gas oxidation heating system according to claim 1, characterized in that: The heights of the heat-absorbing solution inlet (7) and the water inlet (9) are higher than the heights of the water outlet (10) and the heat-absorbing solution outlet (8).

Images