Coke oven flue gas waste heat recovery device
By adopting a design of opposite flow between the exhaust heat pipe and the waste heat pipe, as well as an annular divergent heat transfer component in the coke oven flue gas waste heat recovery device, the problem of flue gas flow resistance was solved, achieving efficient waste heat recovery and uniform heat transfer, and improving the utilization efficiency of coke oven flue gas waste heat.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LINHUAN COKING
- Filing Date
- 2025-06-05
- Publication Date
- 2026-05-12
AI Technical Summary
In existing coke oven flue gas waste heat recovery devices, the flow resistance of the flue gas prevents the effective recovery of waste heat, and the heat transfer device is prone to wear, which affects the efficiency of waste heat utilization.
By adopting a design that allows the exhaust heat main pipe and the waste heat utilization pipe to flow in opposite directions, combined with an annular divergent heat transfer component and a guiding structure, uniform heat transfer of high-temperature flue gas and synchronous heat transfer of fluids are achieved, reducing flow resistance and improving waste heat utilization efficiency.
It achieves efficient recovery of waste heat from coke oven flue gas, reduces heat transfer loss, improves waste heat utilization efficiency, avoids flue gas flow resistance, and improves the uniformity of heat conduction.
Smart Images
Figure CN224230731U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coke oven waste heat utilization technology, and in particular to a coke oven flue gas waste heat recovery device. Background Technology
[0002] As the core equipment in the coking industry, coke ovens generate flue gas with temperatures exceeding 300°C during operation, containing a large amount of untapped waste heat resources. Direct emission of traditional coke oven flue gas not only wastes energy but also exacerbates environmental pollution. In recent years, waste heat recovery technology has become a key direction for industrial energy conservation. Its core objective is to convert the sensible and latent heat in the flue gas into usable energy sources, such as steam, hot water, or electricity, through efficient heat transfer devices.
[0003] In the prior art, referring to the coke oven flue gas waste heat recovery device based on environmental protection transformation with patent publication number CN220959765U, the inner magnetic ring is driven by the outer magnetic ring to move left and right in the flue gas conveying channel to clean the coke oven flue gas pipeline. However, its structure is complex, and the magnetic components are prone to wear during the long-term process of flue gas waste heat utilization, which increases the flow resistance of flue gas and is not conducive to effective waste heat recovery.
[0004] To address the aforementioned technical shortcomings, a solution is proposed. Utility Model Content
[0005] The purpose of this invention is to provide a coke oven flue gas waste heat recovery device to solve the problem that the waste heat cannot be effectively recovered due to the flue gas flow resistance generated during the utilization of flue gas waste heat.
[0006] The objective of this utility model can be achieved through the following technical solution: a coke oven flue gas waste heat recovery device, including a heat exhaust main pipe, a waste heat pipe surrounding the outer side of the heat exhaust main pipe, and the fluid flow directions of the heat exhaust main pipe and the waste heat pipe being opposite; a fluid delivery pipe is installed at one end of several waste heat pipes, and a fluid inlet pipe is installed at the other end of several waste heat pipes; a heat transfer guide ring is suspended in the middle of the heat exhaust main pipe, and a heat transfer rod penetrating into the interior of the waste heat pipe is connected to the outer side of the heat transfer guide ring; a heat equalization pipe concentrically arranged with the heat exhaust main pipe is installed on the heat transfer rod.
[0007] Preferably, one end of the heat exhaust pipe is equipped with an air inlet pipe, the lower end of the air inlet pipe has an air inlet and is connected to the interior of the heat exhaust pipe, and the other end of the heat exhaust pipe is equipped with an exhaust pipe.
[0008] Preferably, the intake pipe is vertical and faces downward, and the exhaust pipe is also vertical and faces upward.
[0009] Preferably, a baffle is installed on the lower inner side of the main exhaust pipe near the intake pipe, and a guide post aligned with the intake pipe opening is installed on the upper end of the baffle, the cross-section of the guide post gradually expanding from the outside to the inside.
[0010] Preferably, the fluid delivery pipe has a diversion outlet at the end of each waste heat pipe, and the fluid inlet pipe has a diversion inlet at the end of each waste heat pipe.
[0011] Preferably, one end of the fluid delivery pipe has a discharge port, and one end of the fluid inlet pipe has an inlet port.
[0012] The beneficial effects of this utility model are:
[0013] (1) In this utility model, on the one hand, the heat transfer setting of high-temperature coke oven flue gas is achieved by the enveloping method of the fluid to be heat transferred, and the uniform setting of the annular divergent heat transfer component is combined to ensure that the high-temperature flue gas will not generate flow resistance during the flow process; on the other hand, the synchronous heat transfer process of different fluids is achieved by the guide structure combined with the multi-fluid counter-current operation, thereby improving the waste heat utilization efficiency of high-temperature coke oven flue gas; the two work together to achieve uniform heat conduction, and reduce heat loss while achieving the waste heat recovery and utilization efficiency of coke oven flue gas.
[0014] (2) The waste heat utilization process is as follows: the coke oven flue gas is drawn into the exhaust heat pipe, and the waste heat pipe is wrapped around the exhaust heat pipe. Then, the heat conduction of the coke oven flue gas is completed by the ring-shaped divergent heat transfer component, so that the low temperature fluid in the waste heat pipe is effectively heated, thereby achieving the purpose of coke oven flue gas waste heat utilization. In addition, no flow resistance is generated during the waste heat utilization process and heat conduction is carried out in real time, which facilitates the effective recovery of coke oven flue gas waste heat.
[0015] (3) The uniform heat transfer process: The high-temperature coke oven flue gas enters the exhaust heat pipe horizontally through the inlet pipe. Under the combined action of the baffle and the guide column, the high-temperature flue gas is guided to the outer ring side of the inner wall of the exhaust heat pipe. The inclined guiding effect of the guide column guides the high-temperature flue gas to the heat transfer ring and the heat transfer rod. Then, the heat transfer rod conducts the high temperature to the outside. In this process, the temperature of the high-temperature flue gas can be effectively distributed, the heat transfer loss can be reduced, and the high temperature conduction can be effectively completed. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings;
[0017] Figure 1 This is a three-dimensional structural view of the entire utility model;
[0018] Figure 2 This is a bottom view of the present invention;
[0019] Figure 3 This is a side sectional view of the present invention;
[0020] Figure 4 This is a front sectional view of the present invention;
[0021] Figure 5 This is a schematic diagram of the heat transfer component of this utility model;
[0022] Figure 6 This is a schematic diagram of the air inlet / outlet assembly of this utility model.
[0023] Legend: 1. Main heat dissipation pipe; 2. Waste heat pipe; 3. Inlet pipe; 4. Exhaust pipe; 5. Fluid delivery pipe; 6. Fluid inlet pipe; 7. Discharge port; 8. Inlet; 9. Inlet; 10. Diversion inlet; 11. Baffle; 12. Heat transfer ring; 13. Heat transfer rod; 14. Heat spreader pipe; 15. Guide column; 16. Diversion outlet. 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] Example 1: This example is used to solve the problem that the waste heat cannot be effectively recovered due to the flow resistance of the flue gas generated during the utilization of waste heat.
[0026] Please see Figure 1 - Figure 6 As shown, this embodiment is a coke oven flue gas waste heat recovery device, including a heat exhaust main pipe 1, a waste heat pipe 2 surrounding the outside of the heat exhaust main pipe 1, and the fluid flow directions of the heat exhaust main pipe 1 and the waste heat pipe 2 are opposite; a fluid delivery pipe 5 is installed at one end of several waste heat pipes 2, and a fluid inlet pipe 6 is installed at the other end of several waste heat pipes 2; a heat transfer ring 12 is suspended in the middle of the heat exhaust main pipe 1, and a heat transfer rod 13 that penetrates into the inside of the waste heat pipe 2 is connected to the outside of the heat transfer ring 12; a heat spreader pipe 14 is installed on the heat transfer rod 13 and is concentrically arranged with the heat exhaust main pipe 1.
[0027] Each end of the fluid delivery pipe 5 is provided with a diversion outlet 16 corresponding to the end of each waste heat pipe 2, and each end of the fluid inlet pipe 6 is provided with a diversion inlet 10 corresponding to the end of each waste heat pipe 2. One end of the fluid delivery pipe 5 is provided with a discharge port 7, and one end of the fluid inlet pipe 6 is provided with an inlet 9. The fluid inlet pipe 6 and the fluid delivery pipe 5 can restrict the flow direction of the fluid to be heat transferred, and the diversion inlet 10 on the fluid inlet pipe 6 can complete the transportation of multiple fluids to be heat transferred, so as to complete the heat transfer transportation of multiple fluids in the waste heat utilization of high temperature coke oven flue gas without interference to each other.
[0028] It should be further explained that the fluid transport channel is formed by the fluid inlet pipe 6, the waste heat pipe 2 and the fluid delivery pipe 5, and is in the opposite direction to the flow direction of the coke oven flue gas in the exhaust heat main pipe 1. In this way, during the recovery and utilization of coke oven flue gas, the opposite flow mode is fully utilized to extend the mutual contact time and further improve the heat transfer efficiency.
[0029] Please see Figure 1 - Figure 6 As shown, the working principle of this utility model differs from the prior art in that: coke oven flue gas is drawn into the exhaust heat pipe 1, and a waste heat pipe 2 is wrapped around the exhaust heat pipe 1. Then, the heat conduction of the coke oven flue gas is completed by the annular divergent heat transfer component, so that the low temperature fluid in the waste heat pipe 2 is effectively heated, achieving the purpose of utilizing the waste heat of coke oven flue gas. Moreover, no flow resistance is generated during the utilization of waste heat of flue gas, and heat conduction is carried out in real time, which facilitates the effective recovery of waste heat of coke oven flue gas.
[0030] Example 2: This example is based on Example 1 and solves the problem of how to ensure the uniform distribution of high-temperature flue gas and heat conduction during the waste heat utilization process of coke oven flue gas.
[0031] Please see Figure 1 , Figure 3 - Figure 5 As shown, a coke oven flue gas waste heat recovery device in this embodiment includes an air inlet pipe 3 installed at one end of a heat exhaust pipe 1, an air inlet 8 opened at the lower end of the air inlet pipe 3 and connected to the interior of the heat exhaust pipe 1, and an exhaust pipe 4 installed at the other end of the heat exhaust pipe 1. The air inlet pipe 3 is vertical and faces downward, and the exhaust pipe 4 is also vertical and faces upward.
[0032] A baffle 11 is installed on the lower inner end of the heat dissipation main pipe 1 near the air inlet pipe 3. A guide post 15 aligned with the opening of the air inlet pipe 3 is installed on the upper end of the baffle 11. The cross section of the guide post 15 gradually expands from the outside to the inside.
[0033] Please see Figure 3 - Figure 5As shown, high-temperature coke oven flue gas enters the exhaust heat main pipe 1 horizontally through the inlet pipe 3. Under the combined action of the baffle 11 and the guide column 15, the high-temperature flue gas is guided to the outer ring side of the inner wall of the exhaust heat main pipe 1. The inclined guiding action of the guide column 15 guides the high-temperature flue gas to the heat transfer ring 12 and the heat transfer rod 13. Then, the heat transfer rod 13 conducts the high temperature to the outside. In this process, the temperature of the high-temperature flue gas can be effectively distributed, the heat transfer loss can be reduced, and the high temperature can be effectively carried out, which facilitates the full utilization of waste heat.
[0034] Combining Embodiments 1 and 2, on the one hand, the heat transfer of high-temperature coke oven flue gas is achieved through the enveloping nature of the fluid to be heat transferred, and the even distribution of the annular divergent heat transfer components ensures that the high-temperature flue gas does not generate flow resistance during its flow. On the other hand, the synchronous heat transfer process of different fluids is achieved through the guiding structure and the multi-fluid counter-current operation, thereby improving the waste heat utilization efficiency of the high-temperature coke oven flue gas. The combined effect of these two aspects achieves uniform heat conduction and reduces heat loss while improving the waste heat recovery efficiency of the coke oven flue gas.
[0035] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.
Claims
1. A coke oven flue gas waste heat recovery device, comprising a heat exhaust main pipe (1), characterized in that, The outer side of the heat exhaust main pipe (1) is surrounded by a waste heat pipe (2), and the fluid flow directions of the heat exhaust main pipe (1) and the waste heat pipe (2) are opposite. A fluid delivery pipe (5) is installed at one end of several waste heat pipes (2), and a fluid inlet pipe (6) is installed at the other end of several waste heat pipes (2). A heat transfer ring (12) is suspended in the middle of the main heat exhaust pipe (1). A heat transfer rod (13) that penetrates into the interior of the waste heat pipe (2) is connected to the outside of the heat transfer ring (12). A heat spreader pipe (14) that is concentrically arranged with the main heat exhaust pipe (1) is installed on the heat transfer rod (13).
2. The coke oven flue gas waste heat recovery device according to claim 1, characterized in that, One end of the heat exhaust pipe (1) is equipped with an air inlet pipe (3), and the lower end of the air inlet pipe (3) is provided with an air inlet (8) and is connected to the interior of the heat exhaust pipe (1). The other end of the heat exhaust pipe (1) is equipped with an exhaust pipe (4).
3. The coke oven flue gas waste heat recovery device according to claim 2, characterized in that, The intake pipe (3) is vertical and faces downward, and the exhaust pipe (4) is also vertical and faces upward.
4. The coke oven flue gas waste heat recovery device according to claim 2, characterized in that, A baffle (11) is installed on the lower inner end of the main heat exhaust pipe (1) near the air inlet pipe (3). A guide post (15) aligned with the opening of the air inlet pipe (3) is installed on the upper end of the baffle (11). The cross section of the guide post (15) gradually diffuses from the outside to the inside.
5. The coke oven flue gas waste heat recovery device according to claim 1, characterized in that, The fluid delivery pipe (5) is provided with a diversion outlet (16) at the end of each waste heat pipe (2), and the fluid inlet pipe (6) is provided with a diversion inlet (10) at the end of each waste heat pipe (2).
6. The coke oven flue gas waste heat recovery device according to claim 5, characterized in that, One end of the fluid delivery pipe (5) is provided with a discharge port (7), and one end of the fluid inlet pipe (6) is provided with an inlet port (9).