Cascade utilization of carbonization tail gas waste heat column tube heat exchange device
Patent Information
- Application Number
- CN202522326281.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-03
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-11-03
AI Technical Summary
但由于传统方式的局限性，无法将不同品位的热量分别回收并应用于不同的工艺需求，导致能源利用层次单一，无法充分发挥余热的最大价值
通过筒体内部由两个隔板分隔形成的高温段、中温段和低温段，实现了碳化尾气余热的分级梯度利用，三个区段依次对碳化尾气进行逐步降温，使高温段能够优先回收碳化尾气中最高品位的热量，中温段进一步利用中段余热，低温段则回收尾气中残余的低温热量，有效提升了整体余热回收效率和能源利用层次，避免了传统单一换热方式造成的高品位热能浪费。
Smart Images
Figure CN224772128U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste heat utilization technology of carbonization tail gas, and in particular to a shell-and-tube heat exchanger for the cascade utilization of waste heat from carbonization tail gas. Background Technology
[0002] Carbonization is a common production process in many industrial sectors such as chemical and metallurgical industries, and it generates a large amount of waste gas containing residual heat. This carbonization waste gas contains abundant thermal energy; effective recovery and utilization of it can significantly reduce energy consumption and production costs, and improve overall energy efficiency, which is of great significance for achieving energy conservation, emission reduction, and sustainable development in industry.
[0003] Currently, many industrial processes still rely on traditional single heat exchange methods to recover and utilize waste heat from carbonization exhaust gases. This lack of tiered treatment of the waste heat prevents the realization of gradient heat utilization. Waste heat at different temperatures has different applications and values; high-grade heat can be used to generate high-temperature steam and heat high-temperature process media, while low-grade heat can be used to preheat low-temperature materials and provide heating. However, due to the limitations of traditional methods, it is impossible to recover heat of different grades separately and apply it to different process needs, resulting in a single level of energy utilization and failing to fully realize the maximum value of waste heat. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a tubular heat exchanger for the cascade utilization of waste heat from carbonization exhaust gas.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: A tubular heat exchanger for the cascade utilization of waste heat from carbonization exhaust gas includes a cylindrical body. Both ends of the cylindrical body are connected to an exhaust gas inlet hood and an exhaust gas outlet hood, respectively. Two partitions are fixedly arranged inside the cylindrical body, dividing the interior into a high-temperature section, a medium-temperature section, and a low-temperature section arranged sequentially. The high-temperature section is close to the exhaust gas inlet hood, and the low-temperature section is close to the exhaust gas outlet hood. A first liquid inlet pipe, a second liquid inlet pipe, and a third liquid inlet pipe are connected to the lower side wall of the cylindrical body, communicating with the high-temperature section, the medium-temperature section, and the low-temperature section, respectively. A first liquid outlet pipe, a second liquid outlet pipe, and a third liquid outlet pipe are connected to the upper side wall of the cylindrical body, communicating with the high-temperature section, the medium-temperature section, and the low-temperature section, respectively. Multiple tubular sections are fixedly connected between the two ends of the cylindrical body, communicating with the exhaust gas inlet hood and the exhaust gas outlet hood.
[0006] As a further improvement of this utility model, the tubes pass through the partition and are fixedly connected to the partition.
[0007] As a further improvement of this utility model, the inner wall of the tube is coated with an anti-carbon-deposit ceramic layer.
[0008] As a further improvement of this utility model, each of the high-temperature section, medium-temperature section and low-temperature section has two baffles fixed inside, and the two baffles are arranged alternately in the upper and lower parts. The tubes pass through the baffles and are fixedly connected to the baffles.
[0009] As a further improvement of this utility model, both the exhaust gas inlet hood and the exhaust gas outlet hood are connected to the cylinder body by bolts.
[0010] As a further improvement of this utility model, two support seats are fixed on the lower side wall of the cylinder.
[0011] The beneficial effects of this utility model are: The high-temperature section, medium-temperature section, and low-temperature section, separated by two baffles inside the cylinder, achieve graded and gradient utilization of waste heat from carbonization exhaust gas. The three sections sequentially cool the carbonization exhaust gas, allowing the high-temperature section to prioritize the recovery of the highest-grade heat in the carbonization exhaust gas, the medium-temperature section to further utilize the waste heat from the middle section, and the low-temperature section to recover the residual low-temperature heat in the exhaust gas. This effectively improves the overall waste heat recovery efficiency and energy utilization level, avoiding the waste of high-grade heat energy caused by traditional single heat exchange methods.
[0012] The high-temperature section, medium-temperature section, and low-temperature section are respectively connected to the first liquid inlet pipe, the second liquid inlet pipe, and the third liquid inlet pipe, which are respectively connected to the first liquid outlet pipe, the second liquid outlet pipe, and the third liquid outlet pipe. This allows the three sections to independently exchange heat in different gradients. The type and flow direction of the heat exchange medium in each section can be flexibly adjusted according to the actual process requirements, which enhances the adaptability and controllability of the system. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the shell-and-tube heat exchanger for the cascade utilization of waste heat from carbonized tail gas proposed in this utility model. Figure 2 This is a cross-sectional structural diagram of the tubular heat exchanger for the cascade utilization of waste heat from carbonized tail gas proposed in this utility model. Figure 3 This is a schematic diagram of the structure of two baffles in the tubular heat exchanger for the cascade utilization of waste heat from carbonized tail gas proposed in this utility model. Figure 4 This is a schematic diagram of the partition of the tubular heat exchanger for the cascade utilization of waste heat from carbonized tail gas proposed in this utility model.
[0014] In the diagram: 1. Cylinder body, 2. Exhaust gas inlet hood, 3. Exhaust gas outlet hood, 4. Support base, 5. First liquid inlet pipe, 6. Second liquid inlet pipe, 7. Third liquid inlet pipe, 8. First liquid outlet pipe, 9. Second liquid outlet pipe, 10. Third liquid outlet pipe, 11. High temperature section, 12. Medium temperature section, 13. Low temperature section, 14. Tubes, 15. Baffle, 16. Divider. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0016] See Figures 1-4 A tubular heat exchanger for the cascade utilization of waste heat from carbonization exhaust gas includes a cylinder 1. Two support seats 4 are fixed to the lower side wall of the cylinder 1. The two ends of the cylinder 1 are respectively connected to an exhaust gas inlet hood 2 and an exhaust gas outlet hood 3. The exhaust gas inlet hood 2 and the exhaust gas outlet hood 3 are both connected to the cylinder 1 by bolts.
[0017] The interior of the cylinder 1 is fixed with two partitions 16 arranged in an array. The two partitions 16 divide the interior of the cylinder 1 into a high-temperature section 11, a medium-temperature section 12, and a low-temperature section 13 arranged in sequence. The high-temperature section 11 is close to the exhaust gas inlet hood 2, and the low-temperature section 13 is close to the exhaust gas outlet hood 3. The lower side wall of the cylinder 1 is connected to a first liquid inlet pipe 5, a second liquid inlet pipe 6, and a third liquid inlet pipe 7 arranged in an array. The first liquid inlet pipe 5, the second liquid inlet pipe 6, and the third liquid inlet pipe 7 are connected to a cold fluid for heat exchange, such as cold water. Pipe 7 is connected to the high temperature section 11, the medium temperature section 12, and the low temperature section 13 respectively. The upper side wall of the cylinder 1 is connected to the first liquid outlet pipe 8, the second liquid outlet pipe 9, and the third liquid outlet pipe 10 arranged in a row. The first liquid outlet pipe 8, the second liquid outlet pipe 9, and the third liquid outlet pipe 10 are connected to the high temperature section 11, the medium temperature section 12, and the low temperature section 13. Multiple tubes 14 are fixedly connected between the two ends of the cylinder 1. The tubes 14 pass through the partition 16 and are fixedly connected to the partition 16. The tubes 14 are connected to the exhaust gas inlet hood 2 and the exhaust gas outlet hood 3. The inner wall of the tubes 14 is coated with an anti-carbon deposition ceramic layer.
[0018] Two baffles 15 are fixed inside each of the high-temperature section 11, the medium-temperature section 12, and the low-temperature section 13. The two baffles 15 are arranged alternately, and the tube 14 passes through the baffles 15 and is fixedly connected to the baffles 15. The two baffles 15 can guide the flow path of the heat exchange fluid, so that the heat exchange fluid and the tube 14 can have a longer path of full contact heat exchange.
[0019] When this utility model is in use, the carbonized tail gas enters the cylinder 1 from the tail gas inlet hood 2 and first reaches the high temperature section 11 adjacent to the tail gas inlet hood 2. The carbonized tail gas transfers heat to the heat exchange fluid outside the tube through the tube wall of the tube 14. The heat exchange fluid that enters the high temperature section 11 from the first liquid inlet pipe 5 flows outside the tube 14 and exchanges heat fully with the high temperature carbonized tail gas through the tube wall of the tube 14. The heated heat exchange fluid flows out of the high temperature section 11 from the first liquid outlet pipe 8. After the carbonized tail gas is initially cooled by the high-temperature section 11, it continues to flow to the medium-temperature section 12 adjacent to the high-temperature section 11. The heat exchange fluid entering the medium-temperature section 12 from the second liquid inlet pipe 6 exchanges heat with the carbonized tail gas outside the tube 14. After absorbing heat, the heat exchange fluid flows out of the medium-temperature section 12 from the second liquid outlet pipe 9. The further cooled carbonized tail gas flows into the low-temperature section 13 adjacent to the medium-temperature section 12. The heat exchange fluid entering the low-temperature section 13 from the third liquid inlet pipe 7 exchanges heat with the low-temperature carbonized tail gas outside the tube 14. After absorbing heat, the heat exchange fluid flows out of the low-temperature section 13 from the third liquid outlet pipe 10. Finally, the carbonized tail gas, after being cooled by three-stage heat exchange, is discharged from the tail gas outlet hood 3 into the cylinder 1, realizing the efficient utilization of the waste heat of the carbonized tail gas in stages.
[0020] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.
Claims
1. A shell-and-tube heat exchanger for cascade utilization of carbonization off-gas waste heat, characterized in that, The device includes a cylindrical body (1), with an exhaust gas inlet hood (2) and an exhaust gas outlet hood (3) connected to its two ends respectively. Two partitions (16) are fixed inside the cylindrical body (1), dividing the interior of the cylindrical body (1) into a high-temperature section (11), a medium-temperature section (12), and a low-temperature section (13) arranged sequentially. The high-temperature section (11) is close to the exhaust gas inlet hood (2), and the low-temperature section (13) is close to the exhaust gas outlet hood (3). A first liquid inlet pipe (5), a second liquid inlet pipe (6), and a third liquid inlet pipe (7) are connected to the lower side wall of the cylindrical body (1). The first liquid inlet pipe... Pipe (5), second inlet pipe (6), and third inlet pipe (7) are respectively connected to the high temperature section (11), medium temperature section (12), and low temperature section (13). The upper side wall of the cylinder (1) is connected to the first outlet pipe (8), second outlet pipe (9), and third outlet pipe (10) arranged in a row. The first outlet pipe (8), second outlet pipe (9), and third outlet pipe (10) are connected to the high temperature section (11), medium temperature section (12), and low temperature section (13). Multiple tubes (14) are fixedly connected between the two ends of the cylinder (1). The tubes (14) are connected to the exhaust gas inlet hood (2) and exhaust gas outlet hood (3).
2. The shell and tube heat exchanger for carbonization off-gas waste heat cascade utilization according to claim 1, characterized in that, The tube (14) passes through the partition (16) and is fixedly connected to the partition (16).
3. The shell and tube heat exchanger for carbonization off-gas waste heat cascade utilization according to claim 1, characterized in that, The inner wall of the tube (14) is coated with an anti-carbon-depositing ceramic layer.
4. The shell and tube heat exchanger for carbonization off-gas waste heat cascade utilization according to claim 1, characterized in that, The high-temperature section (11), medium-temperature section (12), and low-temperature section (13) each have two baffles (15) fixed inside. The two baffles (15) are arranged alternately up and down. The tube (14) passes through the baffles (15) and is fixedly connected to the baffles (15).
5. The shell and tube heat exchanger for carbonization off-gas waste heat cascade utilization according to claim 1, characterized in that, The exhaust gas inlet hood (2) and exhaust gas outlet hood (3) are both connected to the cylinder (1) by bolts.
6. The shell and tube heat exchanger for carbonization off-gas waste heat cascade utilization according to claim 1, characterized in that, The lower side wall of the cylinder (1) is fixed with two support seats (4).