Anti-backflow switching device for subsea combustion

Abstract

The present application relates to a liquid combustion device, in order to prevent the backflow of the slurry in the molten pool, a backflow prevention switching device for liquid combustion is provided, comprising a main pipe, a Z-shaped air inlet pipe connected with the side wall of the main pipe, a connecting pipe for connecting the main pipe and the air inlet pipe, a compressed air pipe detachably penetrating the air inlet pipe, a feeding pipe detachably penetrating the main pipe, a first stopper and a second stopper slidingly arranged in the connecting pipe, and an elastic member for connecting the first stopper and the second stopper; the first stopper is arranged close to the main pipe, and the second stopper is arranged close to the air inlet pipe. The backflow prevention switching device for liquid combustion can efficiently realize the switching of the fuel and effectively prevent the backflow of the slurry.

Description

Technical Field

[0001] This invention relates to the technical field of submersible combustion devices, and more specifically, to a backflow prevention switching device for submersible combustion. Background Technology

[0002] Molten pool smelting is a smelting method in which the furnace charge is directly added to a molten pool churning with blast air to rapidly complete the main reactions between the gas, liquid, and solid phases. This intensified smelting metallurgical method is applicable to metallurgical processes such as melting, sulfidation, oxidation, reduction, matte making, and fuming of non-ferrous metal raw materials.

[0003] In the currently promoted molten pool smelting process, the side-blowing technology uses the necessary reaction air (compressed air), gaseous fuel or solid fuel to be sent into the molten pool from both sides of the side-blowing furnace to complete the submerged combustion process. The connection method uses fixed devices.

[0004] The problem with using this device is that if an emergency or equipment failure occurs during production, the molten material in the furnace can only be released, and production must be stopped for repairs before restarting. This is because the gas or solid is fed into the high-temperature liquid molten material in the furnace under high pressure. Once the supply stops, the molten material in the furnace will flow back, causing a serious production accident. Furthermore, because the slurry may flow backward, this method also makes it difficult to quickly switch between compressed air and natural gas. Summary of the Invention

[0005] The purpose of this invention is to provide a backflow prevention switching device for submerged combustion, which can efficiently switch fuels and effectively prevent slurry backflow.

[0006] The embodiments of the present invention are achieved through the following technical solutions: The anti-backflow switching device for submerged combustion of the present invention includes a main pipe, a Z-shaped air inlet pipe connected to the side wall of the main pipe, a connecting pipe for connecting the main pipe and the air inlet pipe, a compressed air pipe detachably inserted into the air inlet pipe, a feed pipe detachably inserted into the main pipe, a first stop block and a second stop block slidably disposed in the connecting pipe, and an elastic member for connecting the first stop block and the second stop block; the first stop block is disposed close to the main pipe, and the second stop block is disposed close to the air inlet pipe.

[0007] Furthermore, the side of the first stop block closest to the feed pipe is an inclined surface, and the side of the second stop block closest to the compressed air pipe is also an inclined surface.

[0008] Furthermore, the inner wall of the main pipe is provided with a throat, which is located at the first stop.

[0009] Furthermore, it also includes an annular sealing block that is slidably disposed on the inner wall of the main pipe at the end away from the feed pipe; the inner sidewall of the sealing block is provided with multiple protrusions, and the outer wall of the feed pipe at the end near the protrusion is provided with multiple grooves along the axial direction, and the grooves correspond one-to-one with the protrusions.

[0010] Furthermore, the outer wall of the sealing block is provided with a limiting groove along the axial direction, and the inner wall of the main pipe is provided with a limiting strip along the axial direction; the limiting strip is slidably disposed in the limiting groove.

[0011] Furthermore, an annular limiting block is fixedly provided on the inner wall of the main pipe, and the limiting block is located between the air inlet pipe and the connecting pipe.

[0012] Furthermore, the sealing block is made of a magnetic material, and both the feed pipe and the limiting block are made of a material that can be attracted by the magnetic material.

[0013] Furthermore, a pair of positioning rods are provided at the end of the main pipe away from the sealing block, and a positioning block is provided on the side wall of the feed pipe away from the sealing block; the length direction of the positioning rods is parallel to the axial direction of the main pipe, and the positioning block is located between the pair of positioning rods.

[0014] Furthermore, the positioning block is made of a magnetic material, and the positioning rod is made of a material that can be attracted by the magnetic material.

[0015] The technical solution of this invention has at least the following advantages and beneficial effects: The anti-backflow switching device for submerged combustion of this invention connects the main pipe to the molten pool and extends into the pool body. In use, the compressed air pipe can be inserted into the air inlet pipe (the second stop can be directly pushed open during insertion). Compressed gas is sent into the pool body through the compressed air pipe, the air inlet pipe, and the main pipe. At this time, the first stop extends into the main pipe under the action of the elastic element and blocks this position of the main pipe. This can prevent the slurry inside the molten pool from flowing out through the main pipe when the compressed air pipe stops supplying gas. When it is necessary to feed fuel into the pool body, the feed pipe can also be inserted into the main pipe (the first stop will be directly pushed open during insertion). Then, the fuel is sent into the molten pool through the feed pipe. When the feed pipe is pulled out, the first stop will automatically block the main pipe. When the compressed air pipe is pulled out, the second stop will automatically block the air inlet pipe. In this way, the compressed air pipe and the feed pipe will not interfere with each other. Not only can the compressed air pipe and the feed pipe be easily plugged and unplugged to achieve rapid switching of fuel types (different feed pipes can transport different types of fuel), but the slurry in the molten pool can also be prevented from flowing out throughout the entire process. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of one state of the anti-backflow switching device for submerged combustion provided in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of a backflow prevention switching device for submerged combustion provided in an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the internal structure of the anti-backflow switching device for submerged combustion provided in an embodiment of the present invention in two states.

[0020] Figure 4 A schematic diagram of the internal structure of the three states of the anti-backflow switching device for submerged combustion provided in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the feed pipe section in one state according to an embodiment of the present invention;

[0022] Figure 6 A schematic diagram of the two states of the feed pipe section provided in an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the structure of the sealing block portion provided in an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the structure of the first stop portion provided in an embodiment of the present invention;

[0025] Figure 9 for Figure 2 Enlarged view of part A in the middle.

[0026] Icons: 10-Main pipe, 11-Air inlet pipe, 12-Connecting pipe, 13-Compressed air pipe, 14-First stop block, 15-Second stop block, 16-Spring, 17-Throat pipe, 18-Limiting block, 19-Positioning strip, 110-Positioning block, 21-Feed pipe, 22-Groove, 23-Sealing block, 24-Protrusion, 25-Limiting groove. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] 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.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this invention 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 invention.

[0031] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Example

[0033] The following description, in conjunction with specific embodiments, further illustrates the point, as shown in the appendix. Figure 1 -Appendix Figure 9As shown, the anti-backflow switching device for submerged combustion in this embodiment includes a main pipe 10, a Z-shaped air inlet pipe 11 connected to the side wall of the main pipe 10, a connecting pipe 12 for connecting the main pipe 10 and the air inlet pipe 11, a compressed air pipe 13 detachably inserted through the air inlet pipe 11, a feed pipe 21 detachably inserted through the main pipe 10, a first stop 14 and a second stop 15 slidably disposed in the connecting pipe 12, and an elastic member for connecting the first stop 14 and the second stop 15; the first stop 14 is disposed close to the main pipe 10, and the second stop 15 is disposed close to the air inlet pipe 11. Specifically, the main pipe 10 is connected to the molten pool and extends into the pool body. During use, the compressed air pipe 13 can be inserted into the air inlet pipe 11 (the second stop 15 can be directly pushed open during insertion). Compressed gas is sent into the pool body through the compressed air pipe 13, the air inlet pipe 11, and the main pipe 10. At this time, the first stop 14 extends into the main pipe 10 under the action of the elastic element and blocks this position of the main pipe 10. This can prevent the slurry inside the molten pool from flowing out through the main pipe 10 when the compressed air pipe 13 stops supplying air. When it is necessary to send fuel into the pool body, the feed pipe 21 can also be inserted into the main pipe 10 (the first stop 14 will be directly pushed open during insertion). Then, the fuel is sent into the molten pool through the feed pipe 21. When the feed pipe 21 is pulled out, the first stop 14 will automatically block the main pipe 10. When the compressed air pipe 13 is pulled out, the second stop 15 will automatically block the air inlet pipe 11. This design ensures that the compressed air pipe 13 and the feed pipe 21 do not interfere with each other. It allows for easy and direct insertion and removal of both pipes, enabling rapid switching between fuel types (different feed pipes 21 can transport different types of fuel, such as natural gas or pulverized coal). Furthermore, it prevents slurry from flowing out of the molten pool throughout the process (when neither the compressed air pipe 13 nor the feed pipe 21 is needed, a solid rod can be inserted into the main pipe 10 to temporarily seal it). It is important to note that an exhaust port can be provided in the middle of the connecting pipe 12, allowing for a better sealing connection between the first stop block 14 and the second stop block 15 and the connecting pipe 12. The portion of the air inlet pipe 11 connected to the connecting pipe 12 must be parallel to the main pipe 10.

[0034] In this embodiment, the first stop 14 has an inclined surface on the side near the feed pipe 21, and the second stop 15 has an inclined surface on the side near the compressed air pipe 13. Specifically, see attached... Figure 8 As shown, its shape resembles a latch, which allows the first stop block 14 to be pushed more effectively when the feed pipe 21 is inserted into the main pipe 10, enabling smoother insertion. The same applies to the compressed air pipe 13. The elastic element can be a common spring 16.

[0035] In this embodiment, the inner wall of the main pipe 10 is provided with a throat 17, which is located at the first stop block 14. Specifically, the compressed air pipe 13 and the feed pipe 21 can function simultaneously. That is, when the feed pipe 21 is conveying fuel, the compressed air pipe 13 can continue to supply air. The air needs to enter the molten pool through the gap between the feed pipe 21 and the main pipe 10. Therefore, the outer diameter of the feed pipe 21 must be significantly smaller than the inner diameter of the main pipe 10. Thus, a pipe with a smaller diameter, namely the throat 17, can be installed inside the main pipe 10, as shown in the attached figure. Figure 9 As shown. The throat 17 can fix the feed pipe 21, so that the feed pipe 21 is always in a centered state, and can also seal the gap between the feed pipe 21 and the main pipe 10. In addition, the first stop 14 is provided in the throat 17, so that the first stop 14 and the throat 17 cooperate to better seal the main pipe 10.

[0036] In this embodiment, an annular sealing block 23 is also included, which is slidably disposed on the inner wall of the main pipe 10 at the end away from the feed pipe 21; the inner side wall of the sealing block 23 is provided with multiple protrusions 24 (as shown in the attached figure). Figure 7 As shown in the figure, the outer wall of the feed pipe 21 near the protrusion 24 has multiple grooves 22 along the axial direction, with each groove 22 corresponding to a protrusion 24. Specifically, when the feed pipe 21 is inserted into the main pipe 10, different insertion angles result in different outcomes. When the grooves 22 are aligned with the protrusions 24, such that the protrusions 24 are inserted into the grooves 22, the sealing block 23 can tightly engage with the feed pipe 21 and fill the gap between the feed pipe 21 and the main pipe 10, thereby sealing the main pipe 10 (as shown in the figure). Figure 4-5 As shown in the figure, at this time, not only can the slurry in the molten pool not flow out, but the compressed air pipe 13 can also not send air into the molten pool (normally the compressed air pipe 13 will be closed, but this can prevent the compressed air pipe 13 from suddenly opening and supplying air). When the feed pipe 21 is rotated at a certain angle so that the protrusion 24 and the groove 22 are just misaligned, after the feed pipe 21 is inserted into the main pipe 10, the feed pipe 21 will push the sealing block 23 to the end of the main pipe 10 or the end of the moving position (as shown in the figure). Figure 2 and 6 As shown, a limiting device is provided in the main pipe 10 to prevent the sealing block 23 from moving excessively. Then, the air entering through the compressed air pipe 13 can enter the molten pool through the gap between the groove 22 and the protrusion 24.

[0037] In this embodiment, the outer wall of the sealing block 23 is provided with a limiting groove 25 along the axial direction, and the inner wall of the main pipe 10 is provided with a limiting strip along the axial direction; the limiting strip is slidably disposed in the limiting groove 25. Specifically, this can prevent the limiting block 18 from rotating inside the main pipe 10. In addition to setting the limiting strip and the limiting groove 25, the main pipe 10 can also be designed as a polygon, in which case the limiting block 18 also needs to be a polygonal structure, while the feed pipe 21 does not need to be designed as a polygonal structure.

[0038] In this embodiment, an annular limiting block 18 is fixedly provided on the inner wall of the main pipe 10, and the limiting block 18 is located between the air inlet pipe 11 and the connecting pipe 12. The sealing block 23 is made of magnetic material, and both the feed pipe 21 and the limiting block 18 are made of a material that can be attracted by magnetic materials. Specifically, one function of the limiting block 18 is to support the feed pipe 21 together with the throat pipe 17, so that the axis of the feed pipe 21 coincides with the axis of the main pipe 10 (i.e., is centered). Another function is to attract the sealing block 23 through magnetic attraction, thereby temporarily fixing the sealing block 23. When the feed pipe 21 is pulled out, since the sealing block 23 can be attracted to the feed pipe 21, the sealing block 23 can be pulled out through the feed pipe 21 and attracted to the limiting block 18 (as shown in the attached figure). Figure 3 (As shown).

[0039] In this embodiment, a pair of positioning rods are provided at the end of the main pipe 10 away from the sealing block 23, and a positioning block 110 is provided on the side wall of the feed pipe 21 away from the sealing block 23. The length direction of the positioning rods is parallel to the axial direction of the main pipe 10, and the positioning block 110 is located between the pair of positioning rods. The positioning block 110 is made of magnetic material, and the positioning rods are made of a material that can be attracted by magnetic material. Specifically, when the positioning block 110 is attached to different positioning rods, the insertion angle of the feed pipe 21 will be different. When the positioning block 110 is attached to one of the positioning rods and enters the main pipe 10, the protrusion 24 can be engaged in the groove 22. Conversely, when the positioning block 110 is attached to the other positioning rod and enters the main pipe 10, the feed pipe 21 can push the sealing block 23 to move. This corresponds to the two states mentioned above. The positioning rods and positioning blocks 110 are designed to facilitate the operator's operation. The magnetic positioning rods and positioning blocks 110 can effectively prevent errors.

[0040] In summary, the anti-backflow switching device for submerged combustion in this embodiment connects the main pipe 10 to the molten pool and extends into the pool body. During use, the compressed air pipe 13 can be inserted into the air inlet pipe 11 (the second stop 15 can be directly pushed open during insertion). Compressed gas is then delivered into the pool body through the compressed air pipe 13, the air inlet pipe 11, and the main pipe 10. At this time, the first stop 14, under the action of the elastic element, extends into the main pipe 10 and blocks that position of the main pipe 10, thus enabling… To prevent the slurry inside the molten pool from flowing out through the main pipe 10 when the compressed air pipe 13 stops supplying air, and to allow fuel to be fed into the pool, the feed pipe 21 can be inserted into the main pipe 10 (insertion will directly push open the first stop 14), and then the fuel can be fed into the molten pool through the feed pipe 21. When the feed pipe 21 is pulled out, the first stop 14 will automatically block the main pipe 10. When the compressed air pipe 13 is pulled out, the second stop 15 will automatically block the air inlet pipe 11. In this way, the compressed air pipe 13 and the feed pipe 21 will not interfere with each other. Not only can the compressed air pipe 13 and the feed pipe 21 be easily inserted and removed to achieve rapid switching of fuel types (different feed pipes 21 can transport different types of fuel), but the entire process can also prevent the slurry inside the molten pool from flowing out.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A backflow prevention switching device for submerged combustion, characterized in that: Includes a main pipe (10), a Z-shaped air inlet pipe (11) connected to the side wall of the main pipe (10), a connecting pipe (12) for connecting the main pipe (10) and the air inlet pipe (11), a compressed air pipe (13) detachably inserted through the air inlet pipe (11), a feed pipe (21) detachably inserted through the main pipe (10), a first stop (14) and a second stop (15) slidably disposed in the connecting pipe (12), and an elastic member for connecting the first stop (14) and the second stop (15); The first baffle (14) is located near the main pipe (10), and the second baffle (15) is located near the air inlet pipe (11); It also includes an annular sealing block (23) that is slidably disposed on the inner wall of the main pipe (10) at the end away from the feed pipe (21); The inner wall of the sealing block (23) is provided with multiple protrusions (24), and the outer wall of the feed pipe (21) near the protrusions (24) is provided with multiple grooves (22) along the axial direction. The grooves (22) correspond one-to-one with the protrusions (24). The inner wall of the main pipe (10) is fixed with an annular limiting block (18), which is located between the air inlet pipe (11) and the connecting pipe (12); the sealing block (23) is made of magnetic material, and the feed pipe (21) and the limiting block (18) are both made of a material that can be attracted by magnetic material.

2. The anti-backflow switching device for submerged combustion according to claim 1, characterized in that: The first stop (14) has an inclined surface on the side near the feed pipe (21), and the second stop (15) has an inclined surface on the side near the compressed air pipe (13).

3. The anti-backflow switching device for submerged combustion according to claim 1, characterized in that: The inner wall of the main pipe (10) is provided with a throat (17), which is located at the first stop (14).

4. The anti-backflow switching device for submerged combustion according to claim 1, characterized in that: The outer wall of the sealing block (23) is provided with a limiting groove (25) along the axial direction, and the inner wall of the main pipe (10) is provided with a limiting strip along the axial direction; The limiting strip is slidably disposed in the limiting groove (25).

5. The anti-backflow switching device for submerged combustion according to claim 1, characterized in that: The main pipe (10) is provided with a pair of positioning rods at one end away from the sealing block (23), and the feed pipe (21) is provided with a positioning block (110) on one side wall away from the sealing block (23); The length direction of the positioning rod is parallel to the axis of the main pipe (10), and the positioning block (110) is located between the pair of positioning rods.

6. The anti-backflow switching device for submerged combustion according to claim 5, characterized in that: The positioning block (110) is made of a magnetic material, and the positioning rod is made of a material that can be attracted by the magnetic material.

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