Transport train waste heat recovery system and calcium carbide production system

Abstract

The present application relates to a transport train waste heat recovery system and a calcium carbide production system. The transport train waste heat recovery system comprises a conveying track, a first open loop train and a second open loop train. The conveying track comprises a receiving section for receiving a transport trolley, a first waste heat recovery section, a second waste heat recovery section and a discharging section. A waste heat recovery device is used for recovering waste heat. The first waste heat recovery section and the second waste heat recovery section are located in the waste heat recovery device. The first open loop train and the second open loop train alternately pass through the receiving section to receive materials, respectively pass through the first waste heat recovery section and the second waste heat recovery section to recover heat, one of the first open loop train and the second open loop train waits for receiving materials while the other one recovers heat in the waste heat recovery device, and other operations such as discharging can also be performed, thereby improving the flexibility of heat recovery and increasing the time of the trolley in the waste heat recovery device according to the production situation.

Description

Technical Field

[0001] This invention relates to the field of processing furnace-exit materials, and more particularly to waste heat recovery systems for transport trains and calcium carbide production systems. Background Technology

[0002] Chinese patent CN102226594B discloses a method for collecting and reusing waste heat during the solidification process of liquid calcium carbide. Liquid calcium carbide discharged from the furnace nozzle flows into calcium carbide pots placed one by one on a circular transport trolley. The circular transport trolley carrying the calcium carbide pots passes through a waste heat collection box for heat exchange, thus recovering and utilizing the heat. However, because the transport trolleys operate synchronously, they are mutually constrained, resulting in poor flexibility. Furthermore, the dwell time of the transport trolleys in the waste heat collection box is limited by other workstations, further hindering the flexibility of waste heat recovery time. Summary of the Invention

[0003] The purpose of this invention is to provide a waste heat recovery system for transport trains, which solves the technical problem of poor heat recovery flexibility caused by the use of circular trains in current waste heat recovery systems; in addition, the purpose of this invention is also to provide a calcium carbide production system using the above-mentioned waste heat recovery system for transport trains.

[0004] The waste heat recovery system for transport trains of this invention adopts the following technical solution:

[0005] The waste heat recovery system for transport trains includes:

[0006] Conveyor track;

[0007] Both the first and second open-loop trains consist of multiple transport cars connected in series;

[0008] The conveying track includes a receiving section for the transport trolley to receive materials, a first waste heat recovery section, a second waste heat recovery section, and an unloading section. The first open-loop train and the second open-loop train alternately pass through the receiving section to receive materials. The receiving section is located between the first waste heat recovery section and the second waste heat recovery section. The first waste heat recovery section is for the first open-loop train to pass through and stop for waste heat recovery, and the second waste heat recovery section is for the second open-loop train to pass through and stop for waste heat recovery.

[0009] The waste heat recovery device is used to recover waste heat. The conveyor track passes through the waste heat recovery device, and the first waste heat recovery section and the second waste heat recovery section are located inside the waste heat recovery device.

[0010] Beneficial effects: The first open-loop train and the second open-loop train of the present invention alternately pass through the receiving section to receive materials, and then respectively pass through the first waste heat recovery section and the second waste heat recovery section for heat recovery. When one of the first open-loop trains and the second open-loop train is waiting to receive materials, the other can perform heat recovery in the waste heat recovery device, and can also perform other operations such as unloading, which improves the flexibility of heat recovery and can increase the time the trolley spends in the waste heat recovery device according to the production situation.

[0011] Furthermore, the waste heat recovery device includes a waste heat recovery box, with the first waste heat recovery section and the second waste heat recovery section located within the same waste heat recovery box. This simplifies the heat recovery system and improves the utilization efficiency of the waste heat recovery box.

[0012] Furthermore, the first and second waste heat recovery sections are arranged in parallel and spaced apart, resulting in a more compact spatial layout.

[0013] Furthermore, at least two unloading sections are provided, at least one for unloading the first open-loop train and at least one for unloading the second open-loop train. The first waste heat recovery section is located between the first unloading section and the receiving section, and the second waste heat recovery section is located between the second unloading section and the receiving section. The unloading of the first and second open-loop trains does not affect each other, thereby improving unloading efficiency.

[0014] Furthermore, the waste heat recovery system for the transport train also includes a spare track for parking the first or second open-loop train, and a track branching mechanism is provided at the connection between the spare track and the transport track. The spare track facilitates train maintenance and does not affect normal production.

[0015] The technical solution of the calcium carbide production system of this invention:

[0016] The calcium carbide production system includes:

[0017] Calcium carbide furnace;

[0018] Conveyor track;

[0019] Both the first and second open-loop trains include multiple transport trolleys connected in series, which are used to catch the molten calcium carbide flowing out of the calcium carbide furnace.

[0020] The conveying track includes a receiving section for the transport trolley to receive materials, a first waste heat recovery section, a second waste heat recovery section, and a unloading section. The receiving section is arranged around the calcium carbide furnace. The first open-loop train and the second open-loop train are used to alternately pass through the receiving section. The receiving section is located between the first waste heat recovery section and the second waste heat recovery section. The first waste heat recovery section is for the first open-loop train to pass through and stop for waste heat recovery, and the second waste heat recovery section is for the second open-loop train to pass through and stop for waste heat recovery.

[0021] The waste heat recovery device is used to recover waste heat. The conveyor track passes through the waste heat recovery device, and the first waste heat recovery section and the second waste heat recovery section are located inside the waste heat recovery device.

[0022] Beneficial effects: The first open-loop train and the second open-loop train of the present invention alternately pass through the receiving section to receive materials, and then respectively pass through the first waste heat recovery section and the second waste heat recovery section for heat recovery. When one of the first open-loop trains and the second open-loop train is waiting to receive materials, the other can perform heat recovery in the waste heat recovery device, and can also perform other operations such as unloading, which improves the flexibility of heat recovery and can increase the time the trolley spends in the waste heat recovery device according to the production situation.

[0023] Furthermore, the waste heat recovery device includes a waste heat recovery box, with the first waste heat recovery section and the second waste heat recovery section located within the same waste heat recovery box. This simplifies the heat recovery system and improves the utilization efficiency of the waste heat recovery box.

[0024] Furthermore, the first and second waste heat recovery sections are arranged in parallel and spaced apart, resulting in a more compact spatial layout.

[0025] Furthermore, at least two unloading sections are provided, at least one for unloading the first open-loop train and at least one for unloading the second open-loop train. The first waste heat recovery section is located between the first unloading section and the receiving section, and the second waste heat recovery section is located between the second unloading section and the receiving section. The unloading of the first and second open-loop trains does not affect each other, thereby improving unloading efficiency.

[0026] Furthermore, the calcium carbide production system also includes a spare track for parking the first or second open-loop train, and a track branching mechanism is provided at the connection between the spare track and the conveying track. The spare track facilitates train maintenance and does not affect normal production. Attached Figure Description

[0027] Figure 1 This is a layout diagram of a specific embodiment 1 of the waste heat recovery system for transport trains of the present invention and a calcium carbide furnace;

[0028] Figure 1 In the middle section: 1. Conveying track; 11. First unloading section; 12. First waste heat recovery section; 13. Receiving section; 14. Second waste heat recovery section; 15. Second unloading section; 2. First open-loop train; 3. Second open-loop train; 4. Transport trolley; 5. Waste heat recovery box; 6. Calcium carbide furnace; 7. Spare track. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0031] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0033] Specific embodiment 1 of the waste heat recovery system for transport trains of the present invention:

[0034] In this embodiment, the calcium carbide production system is used as an example for illustration. During the calcium carbide production process, the transport trolley receives the molten calcium carbide from the calcium carbide furnace and then cools it during transportation. The heat dissipated during the cooling process of the calcium carbide is recovered through the waste heat recovery system of the transport train.

[0035] like Figure 1As shown, the waste heat recovery system of the transport train includes a conveying track 1, a first open-loop train 2, and a second open-loop train 3; both the first open-loop train 2 and the second open-loop train 3 include multiple transport trolleys 4 connected in series. The transport trolleys 4 are used to catch the molten calcium carbide flowing out of the calcium carbide furnace 6. The transport trolleys 4 and the train are existing technologies and will not be described in detail in this embodiment. For example, the transport trolleys 4 and trains in the patent application with authorization announcement number CN102226594B can be used, or other forms can be used, such as the transport trolleys 4 and trains disclosed in Chinese patent application CN109850541A. In this embodiment, the two trains can use one set of power units. When using one set of power units, the first switch train and the second switch train can be connected to and disconnected from the power unit according to the actual situation, such as using the power unit disclosed in Chinese patent application CN109850541A. In other embodiments, two independent power units can also be used, such as the wheels of the transport trolleys 4 being driven by wheel-side motors, or the movement being pulled by a power locomotive.

[0036] The conveying track 1 includes a first unloading section 11 for unloading material from the first open-loop train 2, a second unloading section 15 for unloading material from the second open-loop train 3, a receiving section 13 for receiving material from the transport trolley 4, a first waste heat recovery section 12, and a second waste heat recovery section 14. The receiving section 13 is arranged around the calcium carbide furnace 6. The first open-loop train 2 and the second open-loop train 3 alternately pass through the receiving section 13, which is located between the first waste heat recovery section 12 and the second waste heat recovery section 14. The first waste heat recovery section 12 is for the first open-loop train 2 to pass through and stop for waste heat recovery, and the second waste heat recovery section 14 is for the second open-loop train 3 to pass through and stop for waste heat recovery. The first unloading section 11 and the second unloading section 15 are located at both ends of the conveying track 1, and the receiving section 13 is located in the middle of the conveying track 1. The first unloading section 11 and the second unloading section 15 are used independently by the first open-loop train 2 and the second open-loop train 3, respectively, to improve unloading efficiency. In this embodiment, the first unloading section 11 and the second unloading section 15 adopt the method of flipping the transport trolley to achieve unloading as described in Chinese patent application CN109850541A. In other embodiments, a robotic arm can also be used to flip the calcium carbide pot of the transport trolley to achieve unloading. The unloading method of the transport trolley is a relatively mature existing technology, and will not be described in detail in this embodiment.

[0037] The waste heat recovery system for transport trains includes a waste heat recovery device, which includes a waste heat recovery box 5. A transport track 1 passes through the waste heat recovery box 5. The waste heat recovery box 5 is existing technology, and its specific structure will not be described in detail. In this embodiment, the first waste heat recovery section 12 and the second waste heat recovery section 14 are arranged in parallel and spaced apart, and are located within the same waste heat recovery box 5. Sharing a single waste heat recovery box 5 improves its utilization rate and simplifies the structure of the waste heat recovery system.

[0038] By alternately receiving materials with the first open-loop train 2 and the second open-loop train 3 and recovering waste heat within the waste heat recovery tank 5, the first open-loop train 2 and the second open-loop train 3 can operate independently without affecting each other within the waste heat recovery tank 5, thus offering greater flexibility. Since the calcium carbide furnace 6 supplies molten calcium carbide at a relatively slow rate, while the first open-loop train 2 waits for the calcium carbide furnace 6 to discharge molten calcium carbide, the second open-loop train 3 can continuously recover heat within the waste heat recovery tank 5, increasing the time it spends within the waste heat recovery tank 5.

[0039] To facilitate train maintenance, the waste heat recovery system for the transport train also includes a spare track 7 for parking the first open-loop train 2 or the second open-loop train. A track bifurcation mechanism is provided at the connection between the spare track 7 and the transport track 1. In this embodiment, the track bifurcation mechanism is located between the first waste heat recovery section 12 and the receiving section 13.

[0040] The track branching mechanism includes a switch head and a switch (not shown in the figure) located at one end of the spare track 7. The switch head is used to move the open-loop train from the transport track 1 to the spare track 7. The switch head is located between the first waste heat recovery section 12 and the calcium carbide furnace surrounding section 13. In this embodiment, both the transport track and the spare track include two parallel and spaced guide rails. The switch head and switch head are existing technologies, employing a similar railway switching mechanism. For example, the switch head can be the switch head for turnouts disclosed in authorization announcement number CN211075909U. When the train needs to move to the spare track, the switch head is opened by the switch head. After the train moves to the spare track, the switch head is reset by the switch head.

[0041] In this embodiment, the spare track 7 is an arc track, and the central angle of the arc track is greater than 180 degrees. The first waste heat recovery section 12 and the second waste heat recovery section 14 are both located on the same side of the spare track. The calcium carbide furnace surrounding section 13 and the spare track 7 are arranged at intervals in the extension direction of the first waste heat recovery section 12, which makes the structure more compact and reduces the floor space.

[0042] When the waste heat recovery system of the transport train of the present invention is working, the molten calcium carbide discharged from the calcium carbide furnace 6 enters the first open-loop train 2. The first open-loop train 2 travels to the waste heat recovery tank 5 to cool the calcium carbide and recover waste heat. The second open-loop train 3 moves to the receiving section 13 to receive the molten calcium carbide. After the first open-loop train 2 has completed waste heat recovery, it continues to move forward to the first unloading section 11 to unload the calcium carbide. Then, the first open-loop train 2 retreats towards the receiving section 13. After receiving the molten calcium carbide, the second open-loop train 3 also enters the waste heat recovery tank 5 to cool the calcium carbide and recover waste heat. After the second open-loop train 3 leaves the receiving section 13, the first open-loop train 2 retreats to the receiving section 13 to wait for receiving. After the second open-loop train 3 has completed cooling, it continues to move forward to the second unloading section 15 to unload. After unloading, it retreats towards the receiving section 13. The first open-loop train 2 and the second open-loop train 3 cycle according to the above-described operation method. Of course, in other embodiments, depending on the working condition of the calcium carbide furnace 6, it is also possible that the first open-loop train 2 and the second open-loop train 3 are simultaneously in the waste heat recovery box 5 within a certain period of time.

[0043] The second specific embodiment of the waste heat recovery system for transport trains of the present invention differs from the above embodiments only in that three unloading sections are provided in this embodiment, depending on the unloading needs. In other embodiments, multiple unloading sections may be provided.

[0044] The third specific embodiment of the waste heat recovery system for transport trains of the present invention differs from the above embodiments only in that two waste heat recovery boxes are provided, with the first waste heat recovery section and the second waste heat recovery section located in the two waste heat recovery boxes respectively. In this case, the first and second waste heat recovery sections can be parallel or arranged at a certain angle as needed.

[0045] The fourth specific embodiment of the waste heat recovery system for transport trains of the present invention differs from the above embodiments only in that the waste heat recovery system for transport trains in this embodiment is used for transporting metal ingots.

[0046] The specific embodiment 5 of the waste heat recovery system for transport trains of the present invention differs from the above embodiments only in that, in this embodiment, only one unloading section is provided. The unloading section is connected to both the first waste heat recovery section and the second waste heat recovery section through a track bifurcation mechanism. When the first train needs to unload, the unloading section is connected to the first waste heat recovery section through the track bifurcation mechanism. When the second train needs to unload, the unloading section is connected to the second waste heat recovery section through the track bifurcation mechanism.

[0047] A specific embodiment of the calcium carbide production system of the present invention is provided. In this embodiment, the calcium carbide production system includes a calcium carbide furnace and a waste heat recovery system. The waste heat recovery system has the same structure as described in any embodiment of the transport train waste heat recovery system, and will not be repeated here. The transport trolley is used to receive the molten calcium carbide flowing out of the calcium carbide furnace, and the receiving section is arranged around the calcium carbide furnace.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A waste heat recovery system for transport trains, characterized in that, include: The system includes a transport track (1) and a first open-loop train (2) and a second open-loop train (3), each of which includes multiple transport trolleys (4) connected in series. The transport track (1) includes a receiving section (13) for the transport trolleys (4) to receive materials, a first waste heat recovery section (12), a second waste heat recovery section (14), and an unloading section. The first open-loop train (2) and the second open-loop train (3) pass through the receiving section (13) alternately to receive materials. The receiving section (13) is located between the first waste heat recovery section (12) and the second waste heat recovery section (14). The first waste heat recovery section (12) is for the first open-loop train (2) to pass through and stop for waste heat recovery, and the second waste heat recovery section (14) is for the second open-loop train (3) to pass through and stop for waste heat recovery. The waste heat recovery system of the transport train also includes a waste heat recovery section. The waste heat recovery device is used to recover waste heat. The conveying track (1) passes through the waste heat recovery device. The first waste heat recovery section (12) and the second waste heat recovery section (14) are located inside the waste heat recovery device. At least two unloading sections are provided. At least one is the first unloading section (11) for unloading the first open-loop train (2), and at least one is the second unloading section (15) for unloading the second open-loop train (3). The first waste heat recovery section (12) is located between the first unloading section (11) and the receiving section (13). The second waste heat recovery section (14) is located between the second unloading section (15) and the receiving section (13). The waste heat recovery system of the transport train also includes a spare track (7) for parking the first open-loop train (2) or the second open-loop train. A track bifurcation mechanism is provided at the connection between the spare track (7) and the conveying track (1).

2. The waste heat recovery system for transport trains according to claim 1, characterized in that, The waste heat recovery device includes a waste heat recovery box (5), and the first waste heat recovery section (12) and the second waste heat recovery section (14) are located in the same waste heat recovery box (5).

3. The waste heat recovery system for transport trains according to claim 2, characterized in that, The first waste heat recovery section (12) and the second waste heat recovery section (14) are set in parallel at intervals.

4. A calcium carbide production system, comprising a calcium carbide furnace (6) and a conveyor track (1), characterized in that, Also includes: The first open-loop train (2) and the second open-loop train (3) both include multiple transport trolleys (4) connected in series. The transport trolleys (4) are used to receive molten calcium carbide flowing out of the calcium carbide furnace (6). The conveying track (1) includes a receiving section (13) for the transport trolleys (4) to receive material, a first waste heat recovery section (12), a second waste heat recovery section (14), and an unloading section. The receiving section (13) is arranged around the calcium carbide furnace (6). The first open-loop train (2) and the second open-loop train (3) pass through the receiving section (13) alternately to receive material. The receiving section (13) is located between the first waste heat recovery section (12) and the second waste heat recovery section (14). The first waste heat recovery section (12) is for the first open-loop train (2) to pass through and stop for waste heat recovery. The second waste heat recovery section (14) is for the second open-loop train (3) to pass through and stop for waste heat recovery. Heat recovery: The calcium carbide production system also includes a waste heat recovery device for recovering waste heat. The conveying track (1) passes through the waste heat recovery device. The first waste heat recovery section (12) and the second waste heat recovery section (14) are located inside the waste heat recovery device. At least two unloading sections are provided, at least one of which is the first unloading section (11) for unloading the first open-loop train (2), and at least one of which is the second unloading section (15) for unloading the second open-loop train (3). The first waste heat recovery section (12) is located between the first unloading section (11) and the receiving section (13), and the second waste heat recovery section (14) is located between the second unloading section (15) and the receiving section (13). The calcium carbide production system also includes a spare track (7) for parking the first open-loop train (2) or the second open-loop train. A track bifurcation mechanism is provided at the connection between the spare track (7) and the conveying track (1).

5. The calcium carbide production system according to claim 4, characterized in that, The waste heat recovery device includes a waste heat recovery box (5), and the first waste heat recovery section (12) and the second waste heat recovery section (14) are located in the same waste heat recovery box (5).

6. The calcium carbide production system according to claim 5, characterized in that, The first waste heat recovery section (12) and the second waste heat recovery section (14) are set in parallel at intervals.

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