A quenching device and cracking furnace

Abstract

The present application provides a quenching device and a cracking furnace, the quenching device comprising: a fixed frame, a plurality of nozzles are arranged on the fixed frame, all the nozzles are evenly arranged with the central axis of the fixed frame as the axis of symmetry, and the central axis of the nozzle is set at an angle to the central axis of the fixed frame; the fixed frame is used to be arranged at a position corresponding to the outlet of the cracking furnace reaction chamber; the nozzle is used to spray quenching liquid to cool the high-temperature cracking gas generated in the cracking furnace reaction chamber. In the above technical solution, by setting the central axis of the nozzle at an angle to the central axis of the fixed frame, the performance and economic cost of the quenching water device are optimally balanced, the cooling efficiency of the quenching device is improved, and the waste of water resources is reduced.

Description

Technical Field

[0001] The present application relates to the field of quenching technology, and in particular to a quenching device and a cracking furnace. Background Art

[0002] The high-temperature cracking gas generated in the reaction chamber of the acetylene cracking furnace needs to be rapidly cooled to below 90°C in a very short time, so a quenching device is installed at the outlet of the reaction chamber of the acetylene cracking furnace.

[0003] At present, the quenching devices on acetylene cracking furnaces in China vary greatly, and the quenching devices of acetylene cracking furnaces with different capacities are quite different. Even for acetylene cracking furnaces with the same capacity, their quenching devices are not exactly the same; this leads to low cooling efficiency of the quenching device and serious waste of water resources. Summary of the invention

[0004] The present application provides a quenching device and a cracking furnace to improve the cooling efficiency of the quenching device and reduce the waste of water resources.

[0005] In a first aspect, a quenching device is provided, comprising: a fixed frame, on which a plurality of nozzles are arranged,

[0006] All the nozzles are evenly arranged with the central axis of the fixing frame as the axis of symmetry.

[0007] The central axis of the nozzle is arranged at an angle to the central axis of the fixing frame;

[0008] The fixing frame is used to be arranged at a position corresponding to the outlet of the cracking furnace reaction chamber;

[0009] The nozzle is used for spraying quenching liquid to cool the high-temperature cracking gas generated in the cracking furnace reaction chamber.

[0010] In the above technical solution, by setting the central axis of the nozzle at an angle to the central axis of the fixing frame, the performance and economic cost of the quenching water device are optimally balanced, thereby improving the cooling efficiency of the quenching device and reducing the waste of water resources.

[0011] In a specific embodiment, the inclination angle of the nozzle is θ / 2, wherein θ is the spray angle of the nozzle.

[0012] In a specific embodiment, the inclination angle of the nozzle is 5 degrees to 80 degrees.

[0013] In a specific implementation manner, a quenching liquid channel is provided inside the fixing frame, and each of the nozzles is connected to the quenching liquid channel.

[0014] In a specific implementation manner, the quenching liquid channel is connected to the quenching liquid source through a pipeline, and a control valve is provided on the pipeline.

[0015] In a specific implementation manner, a pressure boosting mechanism is provided between the quenching liquid channel and the control valve.

[0016] In a specific embodiment, the nozzle is a Laval nozzle.

[0017] In a specific implementation manner, there are multiple fixing frames, and the fixing frames are arranged at equal intervals.

[0018] In a specific implementation manner, the fixing frame is an annular fixing frame.

[0019] In a second aspect, a cracking furnace is provided, comprising any one of the quenching devices described.

[0020] In the above technical solution, by setting the central axis of the nozzle at an angle to the central axis of the fixing frame, the performance and economic cost of the quenching water device are optimally balanced, thereby improving the cooling efficiency of the quenching device and reducing the waste of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a quenching device provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of the structure of another quenching device provided in an embodiment of the present application;

[0023] Figure 3 A schematic diagram of the structure of uniformly arranged nozzles provided in an embodiment of the present application;

[0024] Figure 4a and Figure 4b A schematic diagram of the nozzle inclination angle provided in an embodiment of the present application;

[0025] Figure 5 This is a schematic structural diagram of the spray angle θ and spray distance L of the nozzle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] The present application is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present application will become clearer and more specific.

[0027] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0028] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0029] To facilitate understanding of the quenching device and cracking furnace provided in the embodiment of the present application, its application scenario is first explained. The quenching device provided in the embodiment of the present application is used to improve the cooling efficiency of the quenching device and reduce the waste of water resources. The high-temperature cracking gas generated in the reaction chamber of the electric acetylene cracking furnace needs to be rapidly cooled to below 90°C in a very short time, so a quenching device is provided at the outlet of the reaction chamber of the acetylene cracking furnace. At present, the quenching devices on the domestic acetylene cracking furnaces are quite different, and the quenching devices of acetylene cracking furnaces with different production capacities are quite different. Even the quenching devices of acetylene cracking furnaces with the same production capacity are not the same; this leads to low cooling efficiency of the quenching device and serious waste of water resources. For this reason, the embodiment of the present application provides a quenching device and a cracking furnace to improve the cooling efficiency of the quenching device and reduce the waste of water resources. The following is a detailed description of the embodiments in conjunction with specific drawings.

[0030] Figure 1 A schematic diagram of the structure of a quenching device provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of another quenching device provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of uniformly arranged nozzles provided in an embodiment of the present application; Figure 4a and Figure 4b A schematic diagram of the nozzle inclination angle provided in an embodiment of the present application; Figure 5 This is a schematic diagram of the structure of the spray angle θ and spray distance L of the nozzle provided in the embodiment of the present application. Figure 1 In the embodiment of the present application, a quenching device is provided, comprising: a fixing frame 1, on which a plurality of nozzles 2 are arranged,

[0031] All the nozzles are evenly arranged with the central axis of the fixing frame as the axis of symmetry.

[0032] The central axis of the nozzle is arranged at an angle to the central axis of the fixing frame;

[0033] The fixing frame is used to be arranged at a position corresponding to the outlet of the cracking furnace reaction chamber;

[0034] The nozzle is used to spray quenching liquid to cool the high-temperature cracking gas generated in the cracking furnace reaction chamber. The number of the nozzles is multiple (two or more), such as two, three, and other different numbers.

[0035] In the above technical solution, by setting the central axis of the nozzle at an angle to the central axis of the fixing frame, the performance and economic cost of the quenching water device are optimally balanced, thereby improving the cooling efficiency of the quenching device and reducing the waste of water resources.

[0036] In a specific embodiment, the inclination angle of the nozzle is θ / 2, wherein θ is the spray angle of the nozzle.

[0037] It should be noted that the design value of the nozzle inclination angle α is: for the first layer (the first layer is close to the reaction chamber), in order to completely wrap the high-temperature cracking gas, α must be less than θ / 2, but α cannot be too small, otherwise a large amount of quenching water (quenching liquid is water) will be sprayed onto the outer wall of the reaction chamber, and it will not be able to participate in the cooling process of the high-temperature cracking gas in time, reducing the cooling efficiency of the quenching water device. In specific implementation, the angle of the quenching water nozzle jet boundary reaching the bottom of the inner wall of the reaction chamber and the bottom of the outer wall can be measured in combination with the structure of the reaction chamber, such as Figure 4a and Figure 4b As shown, α2<α<α1 can be taken. For the inclination angle of the nozzles in other layers, θ / 2 can be taken. Referring to FIG4 , the inclination angle α of the nozzle refers to the angle between the central axis of the nozzle and the horizontal plane in the axial section of the fixing frame.

[0038] In a specific embodiment, the inclination angle of the nozzle is 5 degrees to 80 degrees. Preferably, the inclination angle of the nozzle is 5 degrees, 6 degrees, 7 degrees, 8 degrees, 9 degrees, 10 degrees, 11 degrees, 12 degrees, 13 degrees, 14 degrees, 15 degrees, 16 degrees, 17 degrees, 18 degrees, 19 degrees, 20 degrees, 21 degrees, 22 degrees, 23 degrees, 24 degrees, 25 degrees, 26 degrees, 27 degrees, 28 degrees, 29 degrees, 30 degrees, 31 degrees, 32 degrees, 33 degrees, 34 degrees, 35 degrees, 36 degrees, 37 degrees, 38 degrees, 39 degrees, 40 degrees, 41 degrees , 42 degrees, 43 degrees, 44 degrees, 45 degrees, 46 degrees, 47 degrees, 48 ​​degrees, 49 degrees, 50 degrees, 51 degrees, 52 degrees, 53 degrees, 54 degrees, 55 degrees, 56 degrees, 57 degrees, 58 degrees, 59 degrees, 60 degrees, 61 degrees, 62 degrees, 63 degrees, 64 degrees, 65 degrees, 66 degrees, 67 degrees, 68 degrees, 69 degrees, 70 degrees, 71 degrees, 72 degrees, 73 degrees, 74 degrees, 75 degrees, 76 degrees, 77 degrees, 78 degrees, 79 degrees, 80 degrees. In this embodiment, the inclination angle of the nozzle is 40 degrees. By controlling the angle between the central axis of the nozzle and the central axis of the fixing frame, the performance and economic cost of the quenching water device are optimally balanced, the cooling efficiency of the quenching device is improved, and the waste of water resources is reduced.

[0039] In a specific implementation manner, a quenching liquid channel 3 is provided inside the fixing frame, and each of the nozzles is connected to the quenching liquid channel.

[0040] In a specific implementation scheme, the quenching liquid channel is connected to the quenching liquid source 4 through a pipeline, and a control valve 5 is provided on the pipeline.

[0041] In a specific implementation manner, a pressure boosting mechanism 6 is provided between the quenching liquid channel and the control valve.

[0042] In a specific embodiment, the nozzle is a Laval nozzle, which improves the cooling efficiency of the quenching device and reduces the waste of water resources.

[0043] Specifically, the advantages of using Laval nozzles are:

[0044] 1. High pressure advantage:

[0045] As a high-precision nozzle device, Laval nozzle has extremely high spray pressure.

[0046] Through the compression effect inside the nozzle, the Laval nozzle can accurately spray liquid with ideal spraying effect.

[0047] 2. The spray angle is adjustable:

[0048] Compared with traditional nozzle equipment, the spray angle of Laval nozzle can be adjusted according to actual needs. This adjustability enables liquid spraying to achieve the most ideal state, thereby improving the spraying efficiency.

[0049] 3. High-speed liquid jet:

[0050] The Laval nozzle has a unique design and the spray flow rate is very fast.

[0051] 4. High efficiency and energy saving:

[0052] Laval nozzle can achieve higher delivery efficiency and reduce energy consumption by more than 30%-50%.

[0053] 5. Extremely fast:

[0054] Laval nozzles have a fast delivery speed, which can reach 0.1-60 tons / hour; this greatly improves production efficiency and work efficiency.

[0055] 6. Simple and reliable:

[0056] The Laval nozzle has a simple structure, low manufacturing cost and is easy to use.

[0057] At the same time, it has high reliability and stability and can operate normally in harsh working environments.

[0058] In this embodiment, the cooling efficiency of the quenching device is further improved, while the waste of water resources is reduced, thereby achieving energy saving and high efficiency.

[0059] In a specific implementation manner, there are multiple fixing frames, and the fixing frames are arranged at equal intervals.

[0060] In a specific implementation manner, the fixing frame is an annular fixing frame.

[0061] An embodiment of the present application also provides a cracking furnace, comprising any one of the quenching devices described above.

[0062] In the above technical solution, by setting the central axis of the nozzle at an angle to the central axis of the fixing frame, the performance and economic cost of the quenching water device are optimally balanced, thereby improving the cooling efficiency of the quenching device and reducing the waste of water resources.

[0063] In a specific embodiment, it can be seen from the radial cross section of the fixed frame that the jets ejected from multiple nozzles will intersect, and the intersection point forms a circle, such as Figure 3 As shown. The jets ejected from multiple nozzles form a closed water curtain in the radial direction. The diameter of the water curtain is the diameter of the circle formed by the intersection mentioned above. The high-temperature cracked gas coming out of the reaction chamber must be completely wrapped by the water curtain to be effectively cooled. Therefore, the diameter of the reaction chamber must be less than or equal to the diameter of the water curtain.

[0064] In the description of the present application, it should be noted that the terms "upper", "lower", "inside", "outside", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships in the working state of the present application. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present application.

[0065] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0066] The present application has been described above in conjunction with preferred embodiments, but these embodiments are only exemplary and serve only as an illustration. On this basis, various replacements and improvements may be made to the present application, all of which fall within the scope of protection of the present application.

Claims

1. A quenching device, characterized in that: It comprises: a fixed frame, on which a plurality of nozzles are arranged, All the nozzles are evenly arranged with the central axis of the fixing frame as the axis of symmetry. The central axis of the nozzle is arranged at an angle to the central axis of the fixing frame; The fixing frame is used to be arranged at a position corresponding to the outlet of the cracking furnace reaction chamber; The nozzle is used to spray quenching liquid to cool the high-temperature cracking gas generated in the cracking furnace reaction chamber.

2. The quenching device according to claim 1, characterized in that: The inclination angle of the nozzle is θ / 2, wherein θ is the spray angle of the nozzle.

3. The quenching device according to claim 2, characterized in that: The inclination angle of the nozzle is 5 degrees to 80 degrees.

4. The quenching device according to claim 3, characterized in that: A quenching liquid channel is provided inside the fixing frame, and each of the nozzles is communicated with the quenching liquid channel.

5. The quenching device according to claim 4, characterized in that: The quenching liquid channel is connected to the quenching liquid source through a pipeline, and a control valve is arranged on the pipeline.

6. The quenching device according to claim 5, characterized in that: A pressure boosting mechanism is provided between the quenching liquid channel and the control valve.

7. The quenching device according to claim 6, characterized in that: The nozzle is a Laval nozzle.

8. The quenching device according to claim 7, characterized in that: There are multiple fixing frames, and each fixing frame is arranged at equal intervals.

9. The quenching device according to claim 8, characterized in that: The fixing frame is an annular fixing frame.

10. A cracking furnace, characterized in that: It comprises the quenching device as claimed in any one of claims 1 to 9.

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