Dry quenching high temperature superheater system with wide load regulation range
Patent Information
- Application Number
- CN202522365575.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2026-10-16
- Estimated Expiration
- 2035-11-07
AI Technical Summary
如此，初期的投资成本很高，而且长时间在50％负荷左右运行，性价比很低
[0014]The beneficial effects of this utility model are as follows: This utility model realizes the switching of the heating surface between the evaporator system and the superheater system by interlocking the opening and closing of each control valve group, thereby optimizing the matching of the heating surface area of the evaporator system and the superheater system, and thus enabling the dry quenching waste heat boiler to operate stably in a wide range of loads from 40% to 100%.
Smart Images
Figure CN224860539U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dry quenching waste heat boiler technology, specifically to a dry quenching high-temperature superheater system with a wide load adjustment range. Background Technology
[0002] Dry quenching is a widely used coke production technology worldwide. Its basic principle involves using inert gas (or waste gas) as a circulating gas to exchange heat with hot coke in a dry quenching furnace, cooling the coke temperature from 1000℃ to below 250℃, thus achieving quenching. The circulating gas, having absorbed the heat from the coke, transfers this heat to a waste heat boiler to generate steam. The cooled inert gas is then blown back into the dry quenching furnace by a circulating fan. Dry quenching technology improves coke quality, avoids the environmental pollution caused by wet quenching, and recovers the sensible heat of red-hot coke, thus achieving both energy conservation and environmental protection.
[0003] Currently, dry quenching systems typically consist of two waste heat boilers. During normal operation, both boilers share the entire quenching load. However, when one boiler needs maintenance, the other boiler must take over the entire load to avoid disrupting overall system production. Consequently, the waste heat boiler operates at only 50% load during normal operation, reaching 100% only during annual maintenance. Considering load fluctuations, the normal operating load might only be 40%, requiring the boiler to operate within a 40%–100% load adjustment range. This wide load adjustment range presents significant challenges in matching the heating surfaces of the boiler components. In particular, the superheater area required at 100% load is approximately twice that at 50% load. Furthermore, a large amount of desuperheating water needs to be injected during normal operation to maintain stable steam parameters. This results in high initial investment costs and low cost-effectiveness due to prolonged operation at around 50% load. Utility Model Content
[0004] To address the aforementioned technical problems, this utility model provides a dry quenching coke high-temperature superheater system with a wide load adjustment range.
[0005] A dry quenching coke high-temperature superheater system with a wide load adjustment range includes a steam drum, a conversion heat exchanger tube bundle, a high-temperature superheater tube bundle, and a control valve assembly. The conversion heat exchanger tube bundle and the high-temperature superheater tube bundle are arranged in a vertical flue, and the flue gas passes through the conversion heat exchanger tube bundle and the high-temperature superheater tube bundle sequentially. The conversion heat exchanger tube bundle is connected to the conversion heat exchanger inlet header and the conversion heat exchanger outlet header, respectively. The steam drum is connected to the conversion heat exchanger inlet header and the conversion heat exchanger outlet header, respectively, via connecting pipes. The high-temperature superheater tube bundle is connected to the high-temperature superheater inlet header and the high-temperature superheater outlet header, respectively. The conversion heat exchanger outlet header is connected to the high-temperature superheater outlet header via connecting pipes. The control valve assembly is installed on the connecting pipes.
[0006] Furthermore, the control valve group includes control valve group I, control valve group II, control valve group III, control valve group IV and control valve group V.
[0007] Furthermore, each of the control valve assemblies consists of an electric shut-off valve, a manual shut-off valve, and a check valve.
[0008] Furthermore, a downcomer is installed on the connecting pipe between the steam drum and the inlet header of the conversion heating surface, and a control valve group I is arranged thereon; an upcomer is installed on the connecting pipe between the steam drum and the outlet header of the conversion heating surface, and a control valve group III is arranged thereon.
[0009] Furthermore, a control valve group IV is installed on the connecting pipe between the outlet header of the conversion heating surface and the outlet header of the high-temperature superheater.
[0010] Furthermore, the inlet header of the conversion heating surface is connected to the main steam pipeline via a connecting pipe, and a control valve group II is arranged on the connecting pipe connected to the main steam pipeline.
[0011] Furthermore, the outlet header of the high-temperature superheater is connected to the main steam pipeline via a connecting pipe, and a control valve group V is arranged on the connecting pipe connected to the main steam pipeline.
[0012] Furthermore, when control valve group I, control valve group III, and control valve group V are opened, and control valve group II and control valve group IV are closed at the same time, the switching heating surface is the evaporator; when control valve group I, control valve group III, and control valve group V are closed, and control valve group II and control valve group IV are opened at the same time, the switching heating surface is the superheater.
[0013] Furthermore, when the heat exchange surface is used as an evaporator, it is arranged in a counter-current manner; when the heat exchange surface is used as a superheater, it is arranged in a co-current manner.
[0014] The beneficial effects of this utility model are as follows: This utility model realizes the switching of the heating surface between the evaporator system and the superheater system by interlocking the opening and closing of each control valve group, thereby optimizing the matching of the heating surface area of the evaporator system and the superheater system, and thus enabling the dry quenching waste heat boiler to operate stably in a wide range of loads from 40% to 100%. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model.
[0016] Figure 2 This is a process flow diagram of the present invention.
[0017] Figure descriptions: 1. Transfer surface tube bundle; 2. Transfer surface inlet header; 3. Transfer surface outlet header; 4. High-temperature superheater tube bundle; 5. High-temperature superheater inlet header; 6. High-temperature superheater outlet header; 7. Steam drum; 8. Downcomer; 9. Riser; 10. Inlet flue; 11. Vertical flue; 21. Control valve group I; 22. Control valve group II; 23. Control valve group III; 24. Control valve group IV; 25. Control valve group V; 26. Connecting pipes; 27. Main steam pipe. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the figures in the embodiments of the present utility model. 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.
[0019] To make the objectives, technical solutions and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments.
[0020] In the following description, references to "an embodiment," "an embodiment," "an example," "example," etc., indicate that the described embodiment or example may include a particular feature, structure, characteristic, property, element, or limitation, but not every embodiment or example necessarily includes that particular feature, structure, characteristic, property, element, or limitation. Furthermore, the repeated use of the phrase "an embodiment according to this application," while possibly referring to the same embodiment, does not necessarily refer to the same embodiment.
[0021] In this embodiment, as Figure 1 and Figure 2As shown, a dry quenching high-temperature superheater system with a wide load adjustment range includes: a steam drum 7, a conversion heating surface tube bundle 1, a conversion heating surface inlet header 2, a conversion heating surface outlet header 3, a high-temperature superheater tube bundle 4, a high-temperature superheater inlet header 5, a high-temperature superheater outlet header 6, and control valve groups I 21, II 22, III 23, IV 24, and V 25.
[0022] The conversion heating surface tube bundle 1, the conversion heating surface inlet header 2, and the conversion heating surface outlet header 3 together constitute the conversion heating surface.
[0023] The high-temperature superheater tube bundle 4, together with the high-temperature superheater inlet header 5 and the high-temperature superheater outlet header 6, constitute the high-temperature superheater.
[0024] The steam drum 7 is connected to the inlet header 2 of the conversion heating surface via a downcomer 8 and a connecting pipe 26. A control valve group I 21 is arranged on the connecting pipe 26. Meanwhile, the inlet header 2 of the conversion heating surface is connected to the main steam pipe 27 via a control valve group II 22.
[0025] The outlet header 3 of the conversion heating surface is connected to the steam drum 7 via a connecting pipe 26 and a riser pipe 9, and is also connected to the outlet header 6 of the high-temperature superheater via a connecting pipe 26. A control valve group III 23 is arranged on the connecting pipe 26 connected to the steam drum 7, and a control valve group IV 24 is arranged on the connecting pipe 26 connected to the outlet header 6 of the high-temperature superheater.
[0026] The high-temperature superheater outlet header 6 is connected to the main steam pipeline 27 via a connecting pipe 26, and a control valve group V25 is arranged on the connecting pipe 26 connected to the main steam pipeline 27.
[0027] In one embodiment, the high-temperature flue gas first enters the inlet flue 10, then turns and enters the vertical flue 11, passes through the conversion heating surface tube bundle 1 and the high-temperature superheater tube bundle 4 in sequence, and then enters other waste heat boiler heating surfaces, which are not shown in this utility model.
[0028] Specifically, each control valve assembly consists of an electrically operated shut-off valve, a manually operated shut-off valve, and a check valve.
[0029] When control valve group I 21, control valve group III 23, and control valve group V 25 are opened, and control valve group II 22 and control valve group IV 24 are closed at the same time, the switching heating surface is the evaporator; when control valve group I 21, control valve group III 23, and control valve group V 25 are closed, and control valve group II 22 and control valve group IV 24 are opened at the same time, the switching heating surface is the superheater.
[0030] When the heat exchange surface is used as an evaporator, it is arranged in a counter-current manner; when the heat exchange surface is used as a superheater, it is arranged in a co-current manner.
[0031] In this invention, the switching of the heating surface between the evaporator system and the superheater system can be achieved by interlocking the opening and closing of each control valve group, thereby optimizing the matching of the heating surface area of the evaporator system and the superheater system, and thus enabling the dry quenching waste heat boiler to operate stably in a wide range of loads from 40% to 100%.
[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A dry quenching coke high-temperature superheater system with a wide load adjustment range, characterized in that, The system includes a steam drum (7), a conversion heat exchanger tube bundle (1), a high-temperature superheater tube bundle (4), and a control valve assembly. The conversion heat exchanger tube bundle (1) and the high-temperature superheater tube bundle (4) are located in a vertical flue (11), and the flue gas passes through the conversion heat exchanger tube bundle (1) and the high-temperature superheater tube bundle (4) in sequence. The conversion heat exchanger tube bundle (1) is connected to the conversion heat exchanger inlet header (2) and the conversion heat exchanger outlet header (3) respectively. The steam drum (7) is connected to the conversion heat exchanger inlet header (2) and the conversion heat exchanger outlet header (3) respectively through a connecting pipe (26). The high-temperature superheater tube bundle (4) is connected to the high-temperature superheater inlet header (5) and the high-temperature superheater outlet header (6) respectively. The conversion heat exchanger outlet header (3) is connected to the high-temperature superheater outlet header (6) through a connecting pipe (26). The control valve assembly is located on the connecting pipe (26).
2. The dry quenching high-temperature superheater system with a wide load adjustment range according to claim 1, characterized in that, The control valve group includes control valve group I (21), control valve group II (22), control valve group III (23), control valve group IV (24) and control valve group V (25).
3. The dry quenching high-temperature superheater system with a wide load adjustment range according to claim 1, characterized in that, The control valve group consists of an electric shut-off valve, a manual shut-off valve, and a check valve.
4. The dry quenching high-temperature superheater system with a wide load adjustment range according to claim 1, characterized in that, A downcomer (8) is provided on the connecting pipe (26) between the steam drum (7) and the inlet header (2) of the conversion heating surface, and a control valve group I (21) is arranged thereon; an upcomer (9) is provided on the connecting pipe (26) between the steam drum (7) and the outlet header (3) of the conversion heating surface, and a control valve group III (23) is arranged thereon.
5. The dry quenching high-temperature superheater system with a wide load adjustment range according to claim 1, characterized in that, A control valve group IV (24) is installed on the connecting pipe (26) that connects the outlet header (3) of the conversion heat transfer surface to the outlet header (6) of the high temperature superheater.
6. The dry quenching high-temperature superheater system with a wide load adjustment range according to claim 1, characterized in that, The inlet header (2) of the conversion heating surface is connected to the main steam pipe (27) through a connecting pipe (26), and a control valve group II (22) is arranged on the connecting pipe (26) connected to the main steam pipe (27).
7. The dry quenching high-temperature superheater system with a wide load adjustment range according to claim 1, characterized in that, The outlet header (6) of the high-temperature superheater is connected to the main steam pipe (27) via a connecting pipe (26), and a control valve group V (25) is arranged on the connecting pipe (26) connected to the main steam pipe (27).
8. The dry quenching high-temperature superheater system with a wide load adjustment range according to claim 1, characterized in that, When control valve group I (21), control valve group III (23), and control valve group V (25) are opened, and control valve group II (22) and control valve group IV (24) are closed at the same time, the switching heating surface is the evaporator; when control valve group I (21), control valve group III (23), and control valve group V (25) are closed, and control valve group II (22) and control valve group IV (24) are opened at the same time, the switching heating surface is the superheater.
9. A dry quenching high-temperature superheater system with a wide load adjustment range according to claim 1, characterized in that, When the heat exchange surface is used as an evaporator, it is arranged in a counter-current manner; when the heat exchange surface is used as a superheater, it is arranged in a co-current manner.