Cooling water jacket structure and pot-type calcining furnace

Abstract

The utility model discloses a cooling water jacket structure and a pot-type calcining furnace. The cooling water jacket structure comprises a water inlet ring pipe and a water outlet ring pipe, the water outlet ring pipe is arranged above the water inlet ring pipe; the multiple outer through pipes arranged in a surrounding mode form a material channel, the outer through pipes and the inner through pipes communicate with the water inlet ring pipe and the water outlet ring pipe, and the inner through pipes are arranged in the material channel; the inner side wall of the inner through pipe is provided with a first reinforcing structure protruding out of the surface. The water outlet connector is installed on the water outlet ring pipe and comprises an eccentric reducing pipe, the eccentric reducing pipe comprises a large-diameter section and a small-diameter section, the large-diameter section is connected with the water outlet ring pipe, and the central axis of the small-diameter section is located above the central axis of the large-diameter section; the two flange structures are mounted at the two ends of the material channel respectively; the flange structure is provided with an expansion gap penetrating through the flange structure in the radial direction of the material channel, and a baffle is installed in the middle of the expansion gap. According to the cooling water jacket structure, the heat conduction efficiency can be improved, and therefore the gas production rate is increased; the safety is high, and the service life is long.

Description

Technical Field

[0001] This utility model relates to the field of calcining furnace technology, and in particular to a cooling water jacket structure and a tank-type calcining furnace. Background Technology

[0002] As a core piece of equipment for processing raw materials such as petroleum coke and anthracite, the thermodynamic performance of the cooling system in a tank calciner directly affects the quality of the calcined coke and the economic efficiency of equipment operation. Gasification cooling water jackets are commonly used equipment in tank calciners, but currently, commonly used gasification cooling water jackets have the following drawbacks:

[0003] 1. Low heat transfer efficiency: The single-sided radiative heat exchange design results in a small effective heat transfer area and low heat utilization rate; the material has poor heat transfer performance, a long material cooling path, and lag in cooling in the central area of ​​the material, resulting in uneven cooling and a large cooling load on the outlet water jacket connected at the bottom.

[0004] 2. Operational safety hazards: The overall welded frame generates large thermal stress under thermal cycling conditions, which can easily lead to weld cracking; the water flow of the built-in pipeline is uneven, which can easily cause pipe bursts; and there is a risk of flue gas leakage at the connection flange. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a cooling water jacket structure that improves heat transfer efficiency, thereby increasing gas production; it also offers high safety and a long service life.

[0006] This utility model also proposes a tank-type calcining furnace equipped with the above-mentioned cooling water jacket structure.

[0007] The cooling water jacket structure according to the first aspect of this utility model includes:

[0008] Inlet ring pipe;

[0009] An outlet ring pipe is located above the inlet ring pipe;

[0010] An external pipe connects the inlet ring pipe and the outlet ring pipe, and multiple external pipes are arranged in a ring to form a material channel in the middle.

[0011] An inner tube is provided in the material channel, the inner tube connects the water inlet ring pipe and the water outlet ring pipe, and the inner side wall of the inner tube is provided with a first reinforcing structure protruding from its surface;

[0012] A water outlet connector is installed on the water outlet ring pipe; the water outlet connector includes an eccentric reducer, which includes a large-diameter section and a small-diameter section. The large-diameter section is connected to the water outlet ring pipe, and the central axis of the small-diameter section is located above the central axis of the large-diameter section.

[0013] Two flange structures are respectively installed at both ends of the material channel; the flange structure is provided with an expansion joint that runs through the flange structure in the radial direction of the material channel, and a baffle is installed in the middle of the expansion joint.

[0014] The cooling water jacket structure according to the embodiment of this utility model has at least the following beneficial effects:

[0015] By installing an inner pipe connecting the inlet and outlet water rings within the material channel, the contact area between the cooling water and the material can be increased, thereby improving heat transfer efficiency and increasing gas production. The inner wall of the inner pipe features a first reinforcement structure, which reduces film boiling, increases the Nusselt coefficient, reduces the risk of wear due to high-temperature softening of the inner pipe wall, and enhances safety. The eccentric reducer at the outlet joint improves flow field uniformity, reduces steam accumulation volume, and prevents localized vaporization and dry burning, further improving equipment safety. The flange structure, with baffles installed in the center of the expansion joint, improves sealing, reduces leakage risk at the flange structure, increases production efficiency, and enhances equipment operational safety.

[0016] According to some embodiments of the present invention, a structural component is installed on the outer periphery of the material channel, and the outer surface of the external tube is sealed to the structural component; the external tube protrudes from the side of the structural component away from the material channel.

[0017] According to some embodiments of the present invention, the end of the inner tube is bent in a direction away from the material channel, and the end of the inner tube passes through the structural member to connect with the inlet ring pipe or the outlet ring pipe.

[0018] According to some embodiments of the present invention, the end of the external tube is bent in a direction away from the material channel.

[0019] According to some embodiments of the present invention, the outer peripheral wall of the inner tube is provided with a second reinforcing structure protruding from its surface.

[0020] According to some embodiments of the present invention, the first reinforcing structure is configured as a spiral, and the second reinforcing structure is configured as a fin or a spiral.

[0021] According to some embodiments of the present invention, a portion of the inner wall of the small-diameter segment is coplanar with a portion of the inner wall of the large-diameter segment, and the connection between the small-diameter segment and the large-diameter segment is an arc-shaped transition.

[0022] According to some embodiments of the present invention, along the radial direction of the expansion joint, the flange structure is provided with a first slot and a second slot communicating with the expansion joint, and the first slot and the second slot are symmetrically arranged about the expansion joint;

[0023] The baffle can extend and retract along the radial direction of the expansion joint, and the two ends of the baffle abut against the end walls of the first slot and the second slot, respectively.

[0024] According to some embodiments of the present invention, the water inlet ring pipe is equipped with a plurality of water inlet connectors, and the plurality of water inlet connectors are spaced apart along the length direction of the water inlet ring pipe;

[0025] And / or, the water outlet ring pipe is equipped with a plurality of water outlet connectors, and the plurality of water outlet connectors are spaced apart along the length direction of the water outlet ring pipe.

[0026] The tank-type calcining furnace of the second aspect of this utility model is equipped with the above-mentioned cooling water jacket structure; since the tank-type calcining furnace of this embodiment includes the above-mentioned cooling water jacket structure, it has at least all the beneficial effects of the cooling water jacket structure.

[0027] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0029] Figure 1 This is an isometric view of the cooling water jacket structure according to the first aspect of this utility model;

[0030] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0031] Figure 3 This is a top view of the cooling water jacket structure according to the first aspect of this utility model;

[0032] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0033] Figure 5 for Figure 3 A cross-sectional view along the CC direction;

[0034] Figure 6 for Figure 5 Enlarged view of point D in the middle.

[0035] Icon labels:

[0036] Inlet ring pipe 100, inlet connector 110;

[0037] 200mm outlet ring pipe;

[0038] External conduit 300, material channel 310;

[0039] Internal pipe 400;

[0040] Water outlet connector 500, eccentric reducer 510, large diameter section 511, small diameter section 512, equal diameter tee 520;

[0041] Flange structure 600, expansion joint 610, first slot 611, second slot 612, baffle 620, sealing groove 630;

[0042] Structural component 700. Detailed Implementation

[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0044] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, etc., indicating the directional or positional relationship, are based on the directional or positional relationship shown in the drawings and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0045] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0046] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0047] Reference Figures 1 to 6 The cooling water jacket structure of the first aspect of this utility model includes an inlet ring pipe 100, an outlet ring pipe 200, an outer pipe 300, an inner pipe 400, and a structural component 700, as shown in the figure. Figure 1 , Figure 5As shown, the outlet ring pipe 200 is located above the inlet ring pipe 100. An outer pipe 300 and an inner pipe 400 are located between the inlet ring pipe 100 and the outlet ring pipe 200, connecting them. Cooling water enters the outlet ring pipe 200 from the inlet ring pipe 100 via the outer pipe 300 and the inner pipe 400. Multiple outer pipes 300 are arranged in a circular pattern to form a material channel 310 in the center. The inner pipe 400 is located within the material channel 310. A structural component 700 is located on the outer periphery of the material channel 310. The outer surface of the outer pipes 300 is sealed to the structural component 700 to prevent material from leaking radially out of the material channel 310. By connecting the inlet ring pipe 100 and the outlet ring pipe 200 through the inner pipe 400 set in the material channel 310, the contact area between the cooling water and the material can be increased, thereby improving the heat transfer efficiency and thus increasing the gas production.

[0048] It should be understood that the shape of the material channel 310 is not limited in this embodiment, and can be as follows: Figure 3 The elliptical shape shown can also be set to a circle, irregular shape, etc., according to the actual situation; the inner diameter, length and other dimensions of the outlet ring pipe 200 and the inlet ring pipe 100 can be set according to actual needs. For example, the inner diameter of the inlet ring pipe 100 can be set to be greater than the inner diameter of the outlet ring pipe 200, or the length of the outlet ring pipe 200 can be greater than the length of the inlet ring pipe 100, or the inner diameter, length and other dimensions of the inlet ring pipe 100 and the outlet ring pipe 200 can be equal.

[0049] Reference Figure 3 As shown, in this embodiment, the cooling water jacket structure has multiple outer pipes 300 and inner pipes 400. Preferably, the inner pipes 400 have the same inner diameter and dimensions to reduce production costs. Similarly, the outer pipes 300 preferably have the same inner diameter and dimensions. The multiple outer pipes 300 and multiple inner pipes 400 are arranged in a circular, spaced-apart configuration. The inner pipes 400 are located within the material channel 310; therefore, the number of inner pipes 400 is usually less than the number of outer pipes 300. The inner diameter and dimensions of the inner pipes 400 and outer pipes 300 can be set to be the same or different depending on the actual situation; this is not limited in this embodiment.

[0050] In the embodiments of this utility model, reference is made to Figure 1 , Figure 3As shown, the inlet ring pipe 100 is equipped with an inlet connector 110, and the outlet ring pipe 200 is equipped with an outlet connector 500. The inlet ring pipe 100 is equipped with multiple inlet connectors 110, which are spaced apart along the length of the inlet ring pipe 100; and / or, the outlet ring pipe 200 is equipped with multiple outlet connectors 500, which are spaced apart along the length of the outlet ring pipe 200. Preferably, the inlet ring pipe 100 is equipped with multiple inlet connectors 110 and the outlet ring pipe 200 is equipped with multiple outlet connectors 500. The multiple inlet connectors 110 can supply water to the inlet ring pipe 100, and the water in the outlet ring pipe 200 can also flow out from the multiple outlet connectors 500. Compared with the conventional single inlet connector 110 and / or single outlet connector 500, the ring structure of the inlet ring pipe 100 and the outlet ring pipe 200 in this embodiment, combined with multiple inlet connectors 110 and outlet connectors 500, can effectively reduce the flow deviation phenomenon of the cooling water jacket structure. The water temperature at each position of the inlet ring pipe 100 and the outlet ring pipe 200 is more uniform, thereby improving the safety, heat exchange efficiency and service life of the equipment.

[0051] Reference Figure 5 , Figure 6 As shown, the water outlet connector 500 in this embodiment of the present invention includes an eccentric reducer 510, which includes a large-diameter section 511 and a small-diameter section 512. The large-diameter section 511 is connected to the water outlet ring pipe 200, and the central axis of the small-diameter section 512 is located above the central axis of the large-diameter section 511. Specifically, the eccentric reducer 510 is used to connect the water outlet ring pipe 200 and an external pipeline. The central axis of the small-diameter section 512 of the eccentric reducer 510 is located above the central axis of the large-diameter section 511, and a portion of the inner wall of the small-diameter section 512 is coplanar with a portion of the inner wall of the large-diameter section 511. The connection between the small-diameter section 512 and the large-diameter section 511 has an arc-shaped transition. Figure 6 For example, the inner wall of the top of the small-diameter section 512 is coplanar with the inner wall of the top of the large-diameter section 511. During the process of water entering the outlet ring pipe 200 through the outer pipe 300 or inner pipe 400 from the inlet ring pipe 100, some water will exchange heat with the material flowing through the material channel 310 and vaporize. Therefore, the outlet ring pipe 200 is usually a gas-liquid mixture. When the gas-liquid mixture passes through the eccentric reducer 510, the gaseous medium will be at the top and the liquid medium at the bottom. The inner wall of the top of the small-diameter section 512 is coplanar with the inner wall of the top of the large-diameter section 511, facilitating rapid steam discharge and preventing steam from accumulating at the top of the large-diameter section 511, which could lead to localized vaporization and dry burning of the eccentric reducer 510. This extends the service life of the eccentric reducer 510 and improves the safety performance of the equipment. The arc-shaped transition at the connection between the small-diameter section 512 and the large-diameter section 511 can greatly avoid turbulence or impact at the change in inner diameter within the eccentric reducer 510, improve the uniformity of the flow field, and extend the service life of the equipment.

[0052] Furthermore, refer to Figure 6 As shown, the outlet connector 500 also includes an equal-diameter tee pipe 520, which is installed on the outlet ring pipe 200. The large-diameter section 511 of the eccentric reducer 510 is connected to one of the connectors of the equal-diameter tee pipe 520. The equal-diameter tee pipe 520 can be purchased with a suitable type and size of tee pipe according to actual needs. The inner diameters of the three connectors of the equal-diameter tee pipe 520 are equal, which can avoid the generation of turbulence caused by changes in inner diameter, thus affecting the uniformity of the flow field and the service life of the equipment.

[0053] In an embodiment of this utility model, the inner wall of the inner tube 400 is provided with a first reinforcing structure protruding from its surface, and the outer peripheral wall of the inner tube 400 is provided with a second reinforcing structure protruding from its surface; specifically, the first reinforcing structure is configured as a spiral, and the second reinforcing structure is configured as a fin or a spiral. (Refer to...) Figure 3 , Figure 5 As shown, the first reinforcing structure reduces film boiling of water as it passes through the inner pipe 400, increases the Nusselt coefficient, reduces the risk of wear due to high-temperature softening of the inner pipe 400 wall, and improves safety. The second reinforcing structure can be configured as a spiral, annular fins, or helical fins. The inner pipe 400 is located within the material channel 310, therefore its outer surface directly contacts the material flowing through the material channel 310. By providing the second reinforcing structure on the outer surface of the inner pipe 400, the flow path of some materials and airflow can be altered, reducing direct impact between the material and the inner pipe 400 and extending the service life of the equipment.

[0054] In the embodiments of this utility model, the ends of both the outer tube 300 and the inner tube 400 are bent in a direction away from the material channel 310. The bending of the end of the outer tube 300 in a direction away from the material channel 310 can form flared ends at both ends of the material channel 310, thereby reducing the impact of the material on the outer tube 300 and extending the service life of the outer tube 300. The bending of the end of the inner tube 400 in a direction away from the material channel 310 forms an arc, thereby reducing the direct impact of the material on the inner tube 400 and extending the service life of the inner tube 400.

[0055] Furthermore, refer to Figure 1 , Figure 2As shown, the outer pipe 300 protrudes from the side of the structural member 700 opposite to the material channel 310, and the end of the inner pipe 400 passes through the structural member 700 to connect with the inlet ring pipe 100 or the outlet ring pipe 200. Specifically, it is preferable that the outer surface of the outer pipe 300 is welded to the structural member 700, and the thickness of the structural member 700 is smaller than the outer diameter of the outer pipe 300, so that the outer pipe 300 protrudes from both sides of the thickness direction of the structural member 700. This allows the outer pipe 300 to have a better heat exchange effect while also facilitating the observation of the usage status of the outer pipe 300 and the timely handling of potential safety hazards such as damage to the outer pipe 300. Currently, in most cooling water jacket structures, the outer pipe 300 and inner pipe 400 are located inside the material channel 310. The structural component 700 does not extend from the connection points of the inner pipe 400 with the inlet ring pipe 100 or outlet ring pipe 200, nor from the connection points of the outer pipe 300 with the inlet ring pipe 100 or outlet ring pipe 200. This makes it difficult to observe the usage status of the outer pipe 300 and inner pipe 400, as well as the connection status of the inner pipe 400 with the inlet ring pipe 100 or outlet ring pipe 200, and the connection status of the outer pipe 300 with the inlet ring pipe 100 or outlet ring pipe 200. In this embodiment, the outer pipe 300 protrudes from the structural component 700 on the side away from the material channel 310, thus facilitating timely detection and elimination of potential safety hazards such as weld leakage at the connection point of the outer pipe 300 with the inlet ring pipe 100 or outlet ring pipe 200, and damage to the outer pipe 300. Similarly, the end of the inner pipe 400 passes through the structural component 700 to connect with the inlet ring pipe 100 or the outlet ring pipe 200, which can reduce the damage caused by materials to the connection point of the inner pipe 400, extend the service life of the equipment, and at the same time facilitate the observation of the status of the connection point between the inner pipe 400 and the inlet ring pipe 100 or the outlet ring pipe 200, and eliminate potential safety hazards in a timely manner.

[0056] Reference Figure 2 As shown, the end of the outer pipe 300, which corresponds to the position of the inner pipe 400, is bent at a larger angle to avoid interference between the connection of the outer pipe 300 and the inlet ring pipe 100 or the outlet ring pipe 200 and the connection of the inner pipe 400 and the inlet ring pipe 100 or the outlet ring pipe 200.

[0057] The cooling water jacket structure of this embodiment of the utility model also includes flange structures 600. Two flange structures 600 are respectively installed at both ends of the material channel 310. The flange structures 600 are used to connect to the calcining furnace or additional components. Each flange structure 600 has an expansion joint 610 extending radially through the material channel 310, and a baffle 620 is installed in the middle of the expansion joint 610. Specifically, refer to... Figure 3 , Figure 4As shown, the expansion joint 610 is used to alleviate the stress caused by the thermal expansion and contraction of the flange structure 600. However, it is necessary to prevent the material in the material channel 310 from leaking out through the expansion joint 610. Therefore, a baffle 620 is installed inside the expansion joint 610. Currently, the baffle 620 is usually installed at one end of the expansion joint 610 near the material channel 310, but the sealing effect is not good, and there is still a risk of flue gas leaking from the outer periphery of the baffle 620 through the expansion joint 610. By moving the baffle 620 on the flange structure 600 to the middle of the expansion joint 610, the area formed on the side wall of the material channel 310 by the flange structure 600, the expansion joint 610, and the baffle 620 is eliminated. This improves the sealing effect of the baffle 620, reduces the risk of leakage at the flange structure 600, and improves production efficiency and equipment operation safety.

[0058] In an embodiment of this utility model, along the radial direction of the expansion joint 610, the flange structure 600 is provided with a first groove 611 and a second groove 612 communicating with the expansion joint 610. The first groove 611 and the second groove 612 are symmetrically arranged about the expansion joint 610. The baffle 620 can extend and retract along the radial direction of the expansion joint 610, and both ends of the baffle 620 abut against the end walls of the first groove 611 and the second groove 612, respectively. Specifically, refer to... Figure 4 As shown, the specific shape and size of the first slot 611 and the second slot 612 can be set according to the actual situation. The baffle 620 expands and contracts in the radial direction of the expansion joint 610, so that the sealing effect of the baffle 620 on the expansion joint 610 is not affected by the thermal expansion and contraction stress of the flange structure 600.

[0059] Furthermore, the end face of the flange structure 600 is also provided with a sealing groove 630, which is usually filled with expanded vermiculite-based composite material to improve the sealing effect when the flange structure 600 is connected to other equipment.

[0060] The tank-type calcining furnace of the second aspect of this utility model is equipped with the above-mentioned cooling water jacket structure; since the tank-type calcining furnace of this embodiment includes the above-mentioned cooling water jacket structure, it has at least all the beneficial effects of the cooling water jacket structure, which will not be elaborated here.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0062] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A cooling water jacket structure, characterized in that, include: Inlet ring pipe; An outlet ring pipe is located above the inlet ring pipe; An external pipe connects the inlet ring pipe and the outlet ring pipe, and multiple external pipes are arranged in a ring to form a material channel in the middle. An inner tube is provided in the material channel, the inner tube connects the water inlet ring pipe and the water outlet ring pipe, and the inner side wall of the inner tube is provided with a first reinforcing structure protruding from its surface; A water outlet connector is installed on the water outlet ring pipe; the water outlet connector includes an eccentric reducer, which includes a large-diameter section and a small-diameter section. The large-diameter section is connected to the water outlet ring pipe, and the central axis of the small-diameter section is located above the central axis of the large-diameter section.

2. The cooling water jacket structure according to claim 1, characterized in that: A structural component is installed on the outer periphery of the material channel, and the outer surface of the external pipe is sealed to the structural component; the external pipe protrudes from the side of the structural component away from the material channel.

3. The cooling water jacket structure according to claim 2, characterized in that: The ends of both the outer and inner pipes are bent away from the material channel, and the end of the inner pipe passes through the structural member to connect with the inlet ring pipe or the outlet ring pipe.

4. The cooling water jacket structure according to claim 1, characterized in that: The outer peripheral wall of the inner tube is provided with a second reinforcing structure protruding from its surface.

5. The cooling water jacket structure according to claim 4, characterized in that: The first reinforcing structure is configured as a spiral, and the second reinforcing structure is configured as a fin or a spiral.

6. The cooling water jacket structure according to claim 1, characterized in that: A portion of the inner wall of the small-diameter segment is coplanar with a portion of the inner wall of the large-diameter segment, and the connection between the small-diameter segment and the large-diameter segment has an arc-shaped transition.

7. The cooling water jacket structure according to claim 1, characterized in that: Flange structures are installed at both ends of the material channel. The flange structures are provided with expansion joints that penetrate the flange structures in the radial direction of the material channel. A baffle is installed in the middle of the expansion joint.

8. The cooling water jacket structure according to claim 7, characterized in that: Along the radial direction of the expansion joint, the flange structure is provided with a first slot and a second slot communicating with the expansion joint, and the first slot and the second slot are symmetrically arranged about the expansion joint; The baffle can extend and retract along the radial direction of the expansion joint, and the two ends of the baffle abut against the end walls of the first slot and the second slot, respectively.

9. The cooling water jacket structure according to claim 1, characterized in that: The inlet ring pipe is equipped with multiple inlet connectors, and the multiple inlet connectors are spaced apart along the length of the inlet ring pipe. And / or, the water outlet ring pipe is equipped with a plurality of water outlet connectors, and the plurality of water outlet connectors are spaced apart along the length direction of the water outlet ring pipe.

10. A pot-type calcining furnace, characterized in that: The cooling water jacket structure according to any one of claims 1 to 9 is installed.

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