A rotary kiln waste heat utilization device with heat energy recovery function

Abstract

The application discloses a rotary kiln waste heat utilization device with a heat energy recycling function, which comprises a heat exchange box, a heat absorption pipe is arranged in the heat exchange box, a group of smoke inlet frames are inlaid in the bottom surface of the heat exchange box, the bottom surfaces of two smoke inlet frames are commonly connected with a smoke conveying pipe, a group of smoke outlet grooves are arranged on the side surfaces of the two smoke inlet frames which are close to each other, the output end of the heat absorption pipe is connected with a connecting pipe, and a heat energy conversion structure is arranged at the output end of the connecting pipe. The heat absorption pipe and the heat energy conversion structure are matched, the heat absorption pipe can transfer the heat in the flue gas to water, the high-temperature water flows into a steam generator, the water is heated and converted into high-temperature and high-pressure steam in the steam generator, the steam enters a steam turbine through a steam pipeline, the blades of the steam turbine are driven to rotate, the rotating shaft of the steam turbine is connected with a generator, and the generator is driven to generate electricity, so that the efficient utilization of energy is realized.

Description

Technical Field

[0001] This application relates to the field of rotary kiln waste heat utilization technology, and in particular to a rotary kiln waste heat utilization device with heat recovery function. Background Technology

[0002] Rotary kilns are commonly used equipment in industries such as building materials and metallurgy. During their operation, they generate a large amount of high-temperature flue gas. This high-temperature flue gas carries a lot of heat energy. If it is directly discharged into the atmosphere, it will not only cause serious energy waste, but also cause significant thermal pollution to the environment. Therefore, the heat in the flue gas is recovered and utilized.

[0003] Currently, when recovering heat from the flue gas generated by rotary kilns, most methods directly utilize water to absorb the heat from the flue gas, thereby achieving heat recovery. However, this does not achieve the effect of directly utilizing the waste heat. Therefore, we propose a rotary kiln waste heat utilization device with heat recovery function to solve the above problems. Utility Model Content

[0004] The purpose of this application is to provide a rotary kiln waste heat utilization device with heat recovery function to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A rotary kiln waste heat utilization device with heat recovery function includes a heat exchange box, an absorber tube inside the heat exchange box, a set of smoke inlet frames embedded on the bottom surface of the heat exchange box, a smoke conveying pipe connected to the bottom surfaces of two smoke inlet frames, a set of equally spaced smoke outlet slots on the side of the two smoke inlet frames that are close to each other, a connecting pipe connected to the output end of the absorber tube, a heat conversion structure at the output end of the connecting pipe, and a flue gas emission structure at the top of the heat exchange box.

[0007] In a further embodiment, the thermal energy conversion structure includes a steam generator and a steam turbine. The connecting pipe is connected to the water inlet of the steam generator, the steam outlet of the steam generator is connected to the air inlet of the steam turbine through a steam pipe, the air outlet of the steam turbine is connected to a condensing device, and the turbine shaft is connected to a generator.

[0008] In a further embodiment, a set of guide plates is fixedly connected to one side of each of the two smoke inlet frames that are close to each other, and each guide plate is located above the smoke outlet groove.

[0009] In a further embodiment, the flue gas emission structure includes a flue gas duct connected to the top of the heat exchange box, and the inner wall of the flue gas duct is provided with filter cotton and activated carbon plate.

[0010] In a further embodiment, a reinforcing plate is provided between the heat conversion structure and the heat exchange box.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This application utilizes a combination of heat-absorbing pipes and a heat conversion structure to transfer heat from flue gas to water. The high-temperature water then flows into a steam generator, where it is heated and converted into high-temperature, high-pressure steam. The steam then enters a steam turbine through a steam pipe, driving the turbine blades to rotate. The turbine shaft is connected to a generator, thereby driving the generator to generate electricity, achieving efficient energy utilization.

[0013] By combining the inlet frame and outlet trough, the outlet trough can evenly discharge the flue gas to the outside of the heat absorption tube, allowing the water inside the heat absorption tube to absorb the heat from the flue gas more evenly. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall three-dimensional structure of a rotary kiln waste heat utilization device with heat recovery function.

[0015] Figure 2 A three-dimensional structural schematic diagram of the heat conversion structure of a rotary kiln waste heat utilization device with heat recovery function, viewed from the side.

[0016] Figure 3 A three-dimensional structural schematic diagram of the heat exchange box of a rotary kiln waste heat utilization device with heat recovery function.

[0017] Figure 4 This is a sectional view of the exhaust stack of a rotary kiln waste heat recovery device with heat recovery function.

[0018] In the diagram: 1. Heat exchanger; 2. Exhaust pipe; 3. Connecting pipe; 4. Heat energy conversion structure; 5. Condensation device; 6. Water supply tank; 7. Smoke conveying pipe; 8. Smoke inlet frame; 9. Heat absorption pipe; 10. Guide plate; 11. Smoke outlet trough; 12. Filter cotton; 13. Activated carbon plate. Detailed Implementation

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] 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.

[0021] Please see Figures 1-4 In this utility model, a rotary kiln waste heat utilization device with heat recovery function includes a heat exchange box 1. The heat exchange box 1 is equipped with a heat absorption pipe 9. A set of smoke inlet frames 8 are embedded in the bottom surface of the heat exchange box 1. The bottom surfaces of the two smoke inlet frames 8 are connected to a smoke conveying pipe 7. A set of equally spaced smoke outlet grooves 11 are opened on the side of the two smoke inlet frames 8 that are close to each other. The smoke conveying pipe 7 can be used to transport the flue gas inside the rotary kiln, ensuring that the flue gas enters the inside of the smoke inlet frames 8. The flue gas can be gradually discharged from the inside of the smoke outlet grooves 11 and blown towards the heat absorption pipe 9. The water inside the heat absorption pipe 9 will absorb the heat in the flue gas.

[0022] A set of guide plates 10 are fixedly connected to one side of each of the two smoke inlet frames 8 that are close to each other. Each guide plate 10 is located above the smoke outlet groove 11. The guide plates 10 can guide the exhaust gas, so that the exhaust gas can be blown more evenly to the heat absorption tube 9.

[0023] The output end of the heat absorber pipe 9 is connected to a connecting pipe 3. A heat conversion structure 4 is installed at the output end of the connecting pipe 3. A reinforcing plate is installed between the heat conversion structure 4 and the heat exchange box 1. The reinforcing plate connects the heat conversion structure 4 and the heat exchange box 1, ensuring the stability of the heat conversion structure 4 during operation. The heat conversion structure 4 includes a steam generator and a steam turbine. The connecting pipe 3 is connected to the water inlet of the steam generator. The steam outlet of the steam generator is connected to the air inlet of the steam turbine via a steam pipe. A condensing device 5 is connected to the air outlet of the steam turbine, and the turbine shaft is connected to a generator. The heat absorber pipe 9... The water inside absorbs heat and its temperature rises. It then flows into the steam generator through the connecting pipe 3. In the steam generator, the water is heated and converted into high-temperature and high-pressure steam. The steam enters the steam turbine through the steam pipe, driving the turbine blades to rotate. The turbine shaft is connected to the generator, thereby driving the generator to generate electricity. The outlet of the condensing device 5 is connected to the water supply tank 6. The output of the water supply tank 6 is connected to the input of the heat absorption pipe 9. The steam discharged from the steam turbine enters the condensing device 5, is cooled and condensed into water, and can return to the water supply tank 6. The water supply tank 6 can then re-inject the water into the heat absorption pipe 9, achieving recycling.

[0024] The top of the heat exchange box 1 is equipped with a flue gas emission structure, which includes a flue duct 2 connected to the top of the heat exchange box 1. The inner wall of the flue duct 2 is equipped with filter cotton 12 and activated carbon plate 13. The flue duct 2 can be used to discharge the flue gas inside the heat exchange box 1. At the same time, the filter cotton 12 and activated carbon plate 13 can filter the flue gas, thus preventing it from being discharged into the air and causing pollution.

[0025] The working principle of this application is as follows: First, water is injected into the heat absorption tube 9. Then, the flue gas inside the rotary kiln is introduced into the flue gas pipe 7. The flue gas will enter the flue gas inlet frame 8. As the amount of flue gas increases, the flue gas will gradually be discharged from the flue gas outlet 11 and blown towards the heat absorption tube 9. The water flowing inside the heat absorption tube 9 will absorb the heat of the flue gas. After absorbing the heat, the water will flow into the steam generator. In the steam generator, the water is heated and converted into high-temperature and high-pressure steam. The steam enters the steam turbine through the steam pipe, which drives the turbine blades to rotate. The turbine shaft is connected to the generator, thereby driving the generator to generate electricity. The steam discharged from the turbine enters the condensation device 5, is cooled and condensed into water, and can return to the water supply tank 6. The water can be reinjected into the heat absorption tube 9 to achieve recycling.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A rotary kiln waste heat utilization device with heat recovery function, characterized in that: The heat exchange box (1) includes a heat absorption tube (9) inside the heat exchange box (1). A set of smoke inlet frames (8) are embedded on the bottom surface of the heat exchange box (1). The bottom surfaces of the two smoke inlet frames (8) are connected to a smoke conveying pipe (7). A set of equally spaced smoke outlet slots (11) are opened on the side of the two smoke inlet frames (8) that are close to each other. The output end of the heat absorption tube (9) is connected to a connecting pipe (3). The output end of the connecting pipe (3) is provided with a heat energy conversion structure (4). The top of the heat exchange box (1) is provided with a flue gas emission structure.

2. The rotary kiln waste heat utilization device with heat recovery function according to claim 1, characterized in that: The thermal energy conversion structure (4) includes a steam generator and a steam turbine. The connecting pipe (3) is connected to the water inlet of the steam generator. The steam outlet of the steam generator is connected to the air inlet of the steam turbine through a steam pipe. The air outlet of the steam turbine is connected to a condensing device (5), and the turbine shaft is connected to a generator.

3. A rotary kiln waste heat utilization device with heat recovery function according to claim 2, characterized in that: The outlet of the condenser (5) is connected to a water supply tank (6), and the output of the water supply tank (6) is connected to the input of the heat absorption tube (9).

4. A rotary kiln waste heat utilization device with heat recovery function according to claim 1, characterized in that: A set of guide plates (10) are fixedly connected to one side of each of the two smoke inlet frames (8) that are close to each other, and each guide plate (10) is located above the smoke outlet groove (11).

5. A rotary kiln waste heat utilization device with heat recovery function according to claim 1, characterized in that: The flue gas emission structure includes a flue (2) connected to the top of the heat exchange box (1), and the inner wall of the flue (2) is provided with filter cotton (12) and activated carbon plate (13).

6. A rotary kiln waste heat utilization device with heat recovery function according to claim 1, characterized in that: A reinforcing plate is provided between the heat energy conversion structure (4) and the heat exchange box (1).

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