A carbonization furnace zone backwater device
Patent Information
- Application Number
- CN202522111375.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-09-30
AI Technical Summary
[0003]现有炭化炉回水系统存在热交换效率低、导致烟气回收不完全、系统稳定性差等问题，为此，我们在针对传统的炭化炉连接的回水系统进行改进，用于解决现有技术中存在的部分技术问题
在实际使用中，第一回水机构和第二回水机构与回水主管道结合冷却水供水机构和用于处理使用后冷却水的水处理机构共同构成炭化炉的回水装置，同时为炭化炉炉区的碳化作业和烟气进行冷却作业。在实际使用的时候，将冷却水输送至防焦箱用于对炭化炉的作业区记性降温，冷却水在防焦箱中与炉内高温环境进行热交换，降低炉内的作业温度，防止炉内结焦的产生；炉内产生的粗煤气通过烟气管道输送到下一道工序，在输送的过程利用第二回水机构进行一定程度的降温，冷却水先通过第二导流管导入第三冷却管道内，冷却水在呈螺旋状盘设的第三冷却管道被延长输送时间，延长第一次的热交换时间，然后流入第二冷却管道中填充管道内的空隙并直接与烟气管道的外壁接触，进行第二次热交换，整个过程中有效延长了冷却水与粗煤气的热交换时间的同时确保冷却水一直处于流动的状态，大大的提高了冷却水与粗煤气的热交换效率，相较于现有技术采用的传统单次热交换效果更好；完成热交换后的水通过第二输水管流入回水主管道进行后续处理。本实用新型优化了传统的炭化炉回水冷却装置，尤其是针对烟气的冷却设计了二次热交换结构，大大提高了冷却效率，且整个回水装置连通，便于厂区的用水管理。
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Abstract
Description
Technical Field
[0001] This utility model relates to the field of carbonization furnace technology, and in particular to a carbonization furnace zone water return device. Background Technology
[0002] In the carbonization furnace for coal tar production, the main locations where cooling water is needed are: firstly, both sides of the grate, where anti-coking boxes are installed to reduce the temperature of the high-temperature area through cooling water circulation to prevent coking; and secondly, the cooling system, where the high-temperature coal gas generated during carbonization needs to be cooled to 25-35℃ through a primary cooler, a process that relies on cooling water.
[0003] Existing carbonization furnace return water systems suffer from problems such as low heat exchange efficiency, incomplete flue gas recovery, and poor system stability. To address these issues, we have improved the traditional return water system connected to the carbonization furnace to resolve some of the technical problems in the existing technology. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a water return device for the furnace area of a carbonization furnace, which optimizes the traditional water return cooling device for carbonization furnaces. In particular, a secondary heat exchange structure is designed for the cooling of flue gas, which greatly improves the cooling efficiency. Moreover, the entire water return device is connected, which facilitates water management in the plant area.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A water return device for a carbonization furnace zone, wherein the carbonization furnace zone is equipped with an anti-coking box, and the discharge end of the carbonization furnace is connected to a flue gas channel. The water return device includes a first water return mechanism disposed on the anti-coking box, a second water return mechanism disposed on the flue gas channel, and a main water return pipe for jointly transporting the cooling water used in the first and second water return mechanisms to a water treatment unit. The second water return mechanism includes a second cooling pipe sleeved outside the flue gas channel and a third cooling pipe spirally wound between the inner wall of the second cooling pipe and the outer wall of the flue gas channel. The inlet end of the third cooling pipe is connected to a second guide pipe, the outlet end of the third cooling pipe is connected to the second cooling pipe, and the outlet end of the second cooling pipe is provided with a second water supply pipe, which is connected to the main water return pipe.
[0006] Furthermore, the third cooling pipe is spirally coiled inside the second cooling pipe, with a pitch of 1.3 times the pipe diameter and a spiral angle of 15°.
[0007] Furthermore, the inner wall of the second cooling pipe is provided with a number of protrusions arranged in a spiral.
[0008] Furthermore, a second U-shaped return water pipe is provided between the second water supply pipe and the main return water pipe.
[0009] Furthermore, the first water return mechanism includes a first cooling pipe disposed in the anti-scorching box, a first guide pipe for introducing cooling water into the first cooling pipe, and a first water supply pipe for outputting cooling water from the first cooling pipe, wherein the first water supply pipe is connected to the main water return pipe.
[0010] Furthermore, the first cooling pipe comprises at least two rows connected end to end, with each row of the first cooling pipe arranged in an S-shape.
[0011] Furthermore, a first U-shaped return water pipe is provided between the first water supply pipe and the main return water pipe.
[0012] The beneficial effects of this utility model are: In practical use, the first and second water return mechanisms, together with the main water return pipeline, the cooling water supply mechanism, and the water treatment mechanism for treating the cooled water after use, constitute the water return device of the carbonization furnace, which simultaneously cools the carbonization operation and flue gas in the furnace area. In practical use, cooling water is transported to the anti-coking box to cool the working area of the carbonization furnace. The cooling water exchanges heat with the high-temperature environment inside the furnace within the anti-coking box, reducing the working temperature and preventing coking. The raw coal gas generated inside the furnace is transported to the next process via a flue gas pipeline. During this transport, a second return water mechanism provides some cooling. The cooling water is first introduced into the third cooling pipe through the second guide pipe. The spiral-shaped third cooling pipe extends the transport time, prolonging the first heat exchange time. Then, it flows into the second cooling pipe, filling the gaps and directly contacting the outer wall of the flue gas pipeline for a second heat exchange. Throughout this process, the heat exchange time between the cooling water and the raw coal gas is effectively extended while ensuring the cooling water remains constantly flowing, greatly improving the heat exchange efficiency compared to the traditional single-stage heat exchange method used in existing technologies. After heat exchange, the water flows into the main return water pipeline through the second water supply pipe for further treatment. This invention optimizes the traditional carbonization furnace water return cooling device, especially by designing a secondary heat exchange structure for flue gas cooling, which greatly improves cooling efficiency. In addition, the entire water return device is interconnected, which facilitates water management in the plant area. Attached Figure Description
[0013] Figure 1 This is a top view of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the first and second water return mechanisms of this utility model. Figure 3 For the present utility model Figure 2 An enlarged structural diagram at point A; Figure 4 For the present utility model Figure 2An enlarged structural diagram at point A; Figure 5 This is a side view of the present invention. Detailed Implementation
[0014] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.
[0015] refer to Figure 1-4 As shown, this utility model provides a water return device for a carbonization furnace zone. The carbonization furnace zone is equipped with an anti-coking box 1, and the discharge end of the carbonization furnace is connected to a flue gas channel 2. The water return device includes a first water return mechanism 3 installed on the anti-coking box 1, a second water return mechanism 4 installed on the flue gas channel 2, and a main water return pipe 5 for jointly transporting the cooling water used by the first and second water return mechanisms to a water treatment mechanism. The second water return mechanism 4 includes a second cooling pipe 41 sleeved outside the flue gas channel 2 and a third cooling pipe 42 spirally wound between the inner wall of the second cooling pipe 41 and the outer wall of the flue gas channel 2. The inlet end of the third cooling pipe 42 is connected to a second guide pipe 43, the outlet end of the third cooling pipe 42 is connected to the second cooling pipe 41, and the outlet end of the second cooling pipe 41 is provided with a second water supply pipe 44, which is connected to the main water return pipe 5.
[0016] In this embodiment, the first water return mechanism 3 and the second water return mechanism 4, together with the main water return pipe 5, the cooling water supply mechanism and the water treatment mechanism for treating the used cooling water, constitute the water return device of the carbonization furnace, and at the same time, they provide cooling for the carbonization operation and flue gas in the carbonization furnace area. In actual use, cooling water is transported to the anti-coking box 1 to cool the working area of the carbonization furnace. The cooling water exchanges heat with the high-temperature environment inside the furnace in the anti-coking box 1, reducing the working temperature inside the furnace and preventing coking. The crude coal gas generated inside the furnace is transported to the next process through the flue gas pipe 2. During the transportation process, the second return water mechanism 4 is used to cool it to a certain extent. The cooling water is first introduced into the third cooling pipe 43 through the second guide pipe 43. The cooling water is transported for a longer time in the spirally arranged third cooling pipe 43, extending the first heat exchange time. Then it flows into the second cooling pipe 41 to fill the gaps in the pipe and directly contact the outer wall of the flue gas pipe 2 for a second heat exchange. Throughout the process, the heat exchange time between the cooling water and the crude coal gas is effectively extended while ensuring that the cooling water is always in a flowing state, which greatly improves the heat exchange efficiency between the cooling water and the crude coal gas. It is better than the traditional single heat exchange method used in the existing technology. After the heat exchange is completed, the water flows into the return water main pipe 5 through the second water supply pipe 44 for subsequent treatment. This device optimizes the traditional carbonization furnace water return cooling system, especially by designing a secondary heat exchange structure for flue gas cooling, which greatly improves cooling efficiency. In addition, the entire water return system is interconnected, which facilitates water management in the plant area.
[0017] refer to Figure 2 and Figure 4 As shown, the third cooling pipe 42 is spirally coiled inside the second cooling pipe 41, with a pitch of 1.3 times the pipe diameter and a spiral angle of 15°. In this embodiment, the spiral arrangement of the third cooling pipe 42 effectively prolongs the heat exchange time between the cooling water and the flue gas. Studies have found that when the pitch is 1.3 times the pipe diameter and the spiral angle is 15°, the water flow velocity is easier to control.
[0018] refer to Figure 4 As shown, the inner wall of the second cooling pipe 41 is provided with a plurality of protrusions 411, which are arranged in a spiral. In this embodiment, the inner wall of the second cooling pipe 41 is provided with protrusions 411, which are arranged in a spiral to turbulent flow. The turbulence height is 3-5mm, which facilitates the flow of cooling water and helps to enhance the heat exchange effect.
[0019] refer to Figure 2 As shown, a second U-shaped return water pipe 45 is provided between the second water supply pipe 44 and the main return water pipe 5. In this embodiment, the second U-shaped return water pipe 45 is provided. The U-shaped return water pipe guides the water flow circulation, helps to release the pressure in the system, ensures the stable operation of the second return water mechanism 2, and facilitates the monitoring of the operation of the second return water mechanism 4 at any time.
[0020] refer to Figure 2 and Figure 3 As shown, the first water return mechanism 3 includes a first cooling pipe 31 disposed within the anti-coking box 1, a first guide pipe 32 for introducing cooling water into the first cooling pipe 31, and a first water supply pipe 33 for outputting cooling water from the first cooling pipe 31. The first water supply pipe 33 is connected to the main water return pipe 5. In this embodiment, the first cooling pipe 31 through which cooling water flows is disposed within the anti-coking box 1, facilitating heat exchange between the cooling water and the high-temperature environment inside the furnace. A flow control valve is installed on the first guide pipe 32 to control the water inlet speed, which can be adjusted according to the actual temperature inside the furnace, thus enhancing its practicality.
[0021] refer to Figure 2 As shown, the first cooling pipe 31 includes at least two rows connected end to end, and each row of the first cooling pipe 31 is arranged in an S-shape. In this embodiment, setting multiple rows of S-shaped first cooling pipes 31 can effectively increase the contact area between the ambient high temperature and the first cooling pipe 31, and improve the heat exchange efficiency.
[0022] refer to Figure 2 As shown, a first U-shaped return water pipe 34 is provided between the first water supply pipe 33 and the main return water pipe 5. In this embodiment, the first U-shaped return water pipe 34 is provided. The U-shaped return water pipe guides the water flow circulation, helps to release the pressure in the system, ensures the stable operation of the first return water mechanism 3, and facilitates the monitoring of the operation of the first return water mechanism 3 at any time.
[0023] All technical features in this embodiment can be modified in appearance according to actual needs.
[0024] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.
Claims
1. A water return device for a carbonization furnace zone, wherein the carbonization furnace zone is equipped with an anti-scorching box (1), and the discharge end of the carbonization furnace is connected to a flue gas channel (2), characterized in that: The water return device includes a first water return mechanism (3) installed on the anti-scorching box (1), a second water return mechanism (4) installed in the flue gas passage (2), and a main water return pipe (5) for jointly transporting the cooling water used in the first and second water return mechanisms to the water treatment unit. The second water return mechanism (4) includes a second cooling pipe (41) sleeved outside the flue gas passage (2) and a third cooling pipe (42) spirally wound between the inner wall of the second cooling pipe (41) and the outer wall of the flue gas passage (2). The inlet end of the third cooling pipe (42) is connected to a second guide pipe (43), the outlet end of the third cooling pipe (42) is connected to the second cooling pipe (41), the outlet end of the second cooling pipe (41) is provided with a second water supply pipe (44), and the second water supply pipe (44) is connected to the main water return pipe (5).
2. The carbonization furnace zone water return device according to claim 1, characterized in that: The third cooling pipe (42) is spirally coiled inside the second cooling pipe (41), with a pitch of 1.3 times the pipe diameter and a spiral angle of 15°.
3. The carbonization furnace zone water return device according to claim 1, characterized in that: The inner wall of the second cooling pipe (41) is provided with a number of protrusions (411), which are arranged in a spiral.
4. The carbonization furnace zone water return device according to claim 1, characterized in that: A second U-shaped return water pipe (45) is provided between the second water supply pipe (44) and the return water main pipe (5).
5. A carbonization furnace zone water return device according to claim 1, characterized in that: The first water return mechanism (3) includes a first cooling pipe (31) disposed in the anti-scorching box (1), a first guide pipe (32) for introducing cooling water into the first cooling pipe (31), and a first water supply pipe (33) for outputting cooling water from the first cooling pipe (31). The first water supply pipe (33) is connected to the main water return pipe (5).
6. A carbonization furnace zone water return device according to claim 5, characterized in that: The first cooling pipe (31) includes at least two rows connected end to end, and each row of the first cooling pipe (31) is arranged in an S-shape.
7. A carbonization furnace zone water return device according to claim 5, characterized in that: A first U-shaped return water pipe (34) is provided between the first water supply pipe (33) and the return water main pipe (5).