Adjustable nozzle for a bath side-blown furnace

Abstract

The utility model discloses a kind of adjustable nozzles of molten bath side-blown furnace, comprising: nozzle body and adjusting assembly, adjusting assembly is located in nozzle body, and it is configured to move along the axial direction of the spray head of nozzle body, for adjusting the size of spray head inner hole section.This under the condition that inlet pressure and flow rate are invariable, by changing the size of nozzle spray head inner hole section to adjust the mixed gas ejection distance of pulverized coal and air, different material fuming reaction needs can be satisfied.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical technology, specifically to an adjustable nozzle for a side-blown furnace. Background Technology

[0002] A side-blown furnace is a device that blows a mixture of air and pulverized coal into molten slag, causing certain valuable metals in the slag to volatilize in the form of metals, oxides, or sulfides. The nozzles of a side-blown furnace are designed to supply both supplemental air and pulverized coal. Currently, most nozzles are non-adjustable, which cannot meet the requirements for fumigation of different materials and has poor adaptability.

[0003] CN 209352959 U discloses a high-volume molten pool side-blown furnace system, specifically disclosing a first nozzle and a second nozzle with intersecting injection directions. The first nozzle supplies air, and the second nozzle supplies coal. The end of the second nozzle is equipped with several sets of fixed and movable nozzle flaps that are staggered around the edge of the nozzle. The coal injection rate can be adjusted by changing the opening degree of the movable nozzle flaps, but its main purpose is to improve efficiency by adjusting the coal injection rate. Specifically, in the low injection rate state, the air-to-coal ratio is high, allowing for rapid and complete combustion in the furnace to quickly reach the preset temperature. When adjusted to the low injection rate state, the furnace is placed in a reducing atmosphere with high CO content, enabling efficient reduction reactions. The properties of different materials (slag) are adjusted by changing the number of sets of the first and second nozzles.

[0004] Therefore, an adjustable nozzle is needed to meet the fumigation requirements of different materials. Utility Model Content

[0005] To address the aforementioned issues, this invention provides an adjustable nozzle for a side-blown furnace. Under the condition that the inlet pressure and flow rate remain constant, the spray distance of the mixed gas of pulverized coal and air can be adjusted by changing the cross-sectional size of the nozzle head to adapt to materials with different properties.

[0006] Specifically, this utility model is implemented as follows:

[0007] An adjustable nozzle for a side-blown furnace, comprising:

[0008] The nozzle body has a nozzle head at its end;

[0009] An adjustment component, located within the nozzle body and configured to move axially along the nozzle head, is used to adjust the size of the nozzle head's inner bore cross-section.

[0010] Furthermore, the adjustment component includes:

[0011] An adjusting element is provided on the nozzle body;

[0012] A driving component, connected to the adjusting component, is used to drive the adjusting component to move along the axial direction of the nozzle.

[0013] Furthermore, the adjusting component is an adjusting nozzle, which is coaxially arranged with the nozzle. When the adjusting nozzle extends into the nozzle, the two form a nested structure.

[0014] Furthermore, the adjusting element is a central shaft, and the central shaft has a multi-segment stepped structure.

[0015] Furthermore, the drive component is located outside the nozzle body and is connected to the adjusting component via a connecting rod.

[0016] Furthermore, the nozzle body is also provided with an air inlet pipe and a coal powder pipe, and the nozzle body is provided with a manifold chamber, and the nozzle head is connected to the manifold chamber.

[0017] Furthermore, a cleaning port is provided at the end of the nozzle body away from the nozzle head, and a sealing element is provided at the cleaning port.

[0018] Furthermore, the sealing element is a one-way valve ball. In use, the air pressure in the manifold chamber pushes the one-way valve ball to seal the cleaning port. The nozzle body is provided with a temporary storage chamber. When the one-way valve ball is placed in the temporary storage chamber, the cleaning port is connected to the manifold chamber.

[0019] The working principle of this utility model:

[0020] Powdered coal enters the manifold chamber from the powdered coal pipe and merges with compressed air from the inlet pipe. When the air pressure in the manifold chamber increases, the one-way valve ball seals the cleaning port at the rear end of the manifold chamber, and the mixed gas is ejected from the front nozzle. When an adjusting nozzle is used as the regulating component, the adjusting nozzle and the nozzle are nested, and the adjusting nozzle is connected to the drive component via a connecting rod. The adjusting nozzle and the nozzle can be nested or separated by the drive mechanism to adjust the size of the nozzle's inner orifice. Since the inlet pressure and flow rate are constant, when the nozzle's inner orifice becomes smaller, the mixed gas ejected from the nozzle will have a faster ejection speed, and its spray distance and coverage will be greatly improved. This allows for better contact between the powdered coal and the fuming material, resulting in a more complete fuming reaction, which is suitable for finer and lighter raw materials. When the nozzle's inner orifice becomes larger, the mixed gas ejected from the nozzle will have a relatively slower ejection speed, thus reducing its spray distance. The distribution of powdered coal and air will be more concentrated, which can increase the temperature of the fuming reaction, making it suitable for raw materials with higher fuming temperatures or larger particles.

[0021] Similarly, a central shaft can also be used as an adjusting component, and the size of the nozzle's inner bore cross-section can be changed by using a stepped core-filling method.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] (1) The adjustable nozzle of the side-blown furnace provided by this utility model can adjust the spray distance of the mixed gas of coal powder and air according to the material properties, so as to meet the fuming reaction requirements of different materials.

[0024] (2) The size of the nozzle inner hole cross section is changed by using a driving component to drive the adjusting component to move along the nozzle axis. The structure is simple and the adjustment is convenient.

[0025] (3) The adjustable nozzle of the side-blown furnace provided by this utility model can be adjusted during the start-up process; the spray distance of the mixed gas of coal powder and air can be freely adjusted according to different stages of material processing during the start-up process. Compared with other side-blown furnace nozzles that require furnace shutdown for adjustment, it has stronger material adaptability and is more convenient to use. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the adjustable nozzle of the side-blown furnace in Example 1;

[0027] Figure 2 This is a schematic diagram of the structure of the adjustable nozzle head with smaller inner hole cross-section in the side-blown furnace of Example 1;

[0028] Figure 3 This is a schematic diagram showing the state when cleaning the nozzle in Example 1;

[0029] Figure 4 This is a schematic diagram of the adjustable nozzle of the side-blown furnace in Example 2;

[0030] Figure 5 This is a schematic diagram of the structure in Example 2 where the first stage of the central axis is located inside the nozzle;

[0031] Figure 6 This is a schematic diagram of the structure in Example 2 where the second stage of the central axis is located inside the nozzle;

[0032] Figure 7 This is a schematic diagram of the structure in Example 2 where the third stage of the central axis is located inside the nozzle.

[0033] Figure label:

[0034] 1- Nozzle body; 11- Manifold chamber; 12- Cleaning port; 13- Temporary storage chamber; 2- Air inlet pipe; 3- Pulverized coal pipe; 4- Nozzle head; 51a- Adjusting nozzle; 51b- Central shaft; 52- Connecting rod; 53- Cylinder; 6- One-way valve ball. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0036] Example 1

[0037] like Figure 1-2 As shown, this embodiment discloses an adjustable nozzle for a side-blown furnace, including: a nozzle body 1, a nozzle head 4, and an adjustment assembly. The nozzle body 1 has a built-in confluence chamber 11, with the nozzle head 4 at the front end and a cleaning port 12 at the rear end. The air inlet pipe 2 and the pulverized coal pipe 3 on the nozzle body 1 are connected to the confluence chamber 11. The air inlet pipe 2 supplies compressed air, and the pulverized coal pipe 3 supplies pulverized coal. The compressed air and pulverized coal converge in the confluence chamber 11 to form a mixed gas, which is finally sprayed out from the nozzle head 4.

[0038] like Figure 3 As shown, a temporary storage chamber 13 and a one-way valve ball 6 are provided at the cleaning port 12. The temporary storage chamber 13 is inclined. The diameter of the cleaning port 12 and the diameter of the connection between it and the manifold chamber 11 should be smaller than the diameter of the one-way valve ball 6, so that the one-way valve ball 6 can switch positions at the cleaning port 12 or in the temporary storage chamber 13. When pulverized coal enters the manifold chamber 11 from the pulverized coal pipe 3 and merges with the compressed air from the air inlet pipe 2, when the air pressure in the manifold chamber 11 increases, the one-way valve ball 6 is pushed to seal the cleaning port 12 under the action of air pressure, thus achieving a seal at the rear end using the one-way valve ball 6. When it is necessary to clean the nozzle, a steel rod can be inserted into the nozzle body 1 through the cleaning port 12 for cleaning. At this time, the one-way valve ball 6 will be pushed into the temporary storage chamber 13.

[0039] An adjusting nozzle 51a is provided inside the nozzle body 1 for adjusting the outlet orifice diameter of the nozzle 4. The adjusting nozzle 51a is a tubular structure, and its rear end is connected to a cylinder 53 via a connecting rod 52. The cylinder 53 drives it to move axially along the nozzle 4. Figure 2 As shown, when the regulating nozzle 51a extends into the nozzle 4, the two form a nested structure. Simultaneously, the wall thickness of the regulating nozzle 51a reduces the inner diameter of the nozzle 4. The inlet pressure and flow rate remain constant. When the inner diameter of the nozzle 4 decreases, the mixed gas is ejected from the nozzle 4, and its ejection speed increases, significantly improving the spray distance and coverage. This allows for better contact between the pulverized coal and the fuming material, resulting in a more complete fuming reaction, suitable for finer and lighter raw materials. When the regulating nozzle 51a retracts from the nozzle 4, the ejection speed decreases relatively, and the distribution of pulverized coal and air becomes more concentrated, increasing the temperature of the fuming reaction. This is suitable for raw materials with higher fuming temperatures or larger particles.

[0040] Example 2

[0041] like Figure 4-7 As shown, this embodiment discloses another adjustable nozzle for a side-blown furnace, which includes a nozzle body 1, a nozzle 4 and a central shaft 51b. The rear end of the central shaft 51b is connected to a cylinder 53 via a connecting rod 52. The cylinder 53 drives the central shaft 51b to move axially along the nozzle 4, thereby changing the size of the inner hole cross-section of the nozzle 4 by means of core filling, thereby realizing the adjustment of the speed and distance of the mixed gas ejected by the nozzle.

[0042] Specifically, the central shaft 51b has a multi-segment stepped structure. This embodiment adopts a three-segment structure, which can achieve four levels of adjustment of the inner hole cross-section of the nozzle 4, that is, as shown in the figure. Figure 4 When the front section of the central shaft 51b does not extend into the nozzle 4, the velocity of the mixed gas ejected from the nozzle 4 is the slowest, and the distribution of pulverized coal and air is most concentrated. When the front section of the central shaft 51b extends into the nozzle 4, as shown... Figure 5 As shown, the velocity of the mixed gas ejected from nozzle 4 increases, and so on. When the largest diameter part of the front and rear sections of the central shaft 51b extends into nozzle 4, as... Figure 7 As shown, at this time, the inner cross-section of nozzle 4 is the smallest, the speed of the ejected mixed gas is the fastest, and the spray distance and coverage of coal powder and air are also the largest.

[0043] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. An adjustable nozzle for a side-blown furnace, comprising: The nozzle body (1), with a nozzle (4) provided at its end, is characterized in that it further includes: An adjustment component is located inside the nozzle body (1) and configured to move axially along the nozzle (4) for adjusting the size of the inner bore cross-section of the nozzle (4).

2. The adjustable nozzle for a side-blown furnace as described in claim 1, characterized in that, The adjustment component includes: An adjusting element is provided on the nozzle body (1); A driving component, connected to the adjusting component, is used to drive the adjusting component to move axially along the nozzle (4).

3. The adjustable nozzle for a side-blown furnace as described in claim 2, characterized in that, The adjusting component is an adjusting nozzle (51a), which is coaxially arranged with the nozzle (4). When the adjusting nozzle (51a) extends into the nozzle (4), the two form a nested structure.

4. The adjustable nozzle for a side-blown furnace as described in claim 2, characterized in that, The adjusting component is a central shaft (51b), which has a multi-stage stepped structure.

5. The adjustable nozzle for a side-blown furnace as described in claim 2, characterized in that, The drive component is located outside the nozzle body (1) and is connected to the adjustment component via a connecting rod (52).

6. The adjustable nozzle for a side-blown furnace as described in any one of claims 1-5, characterized in that, The nozzle body (1) is also provided with an air inlet pipe (2) and a coal powder pipe (3). The nozzle body (1) is provided with a manifold chamber (11), and the nozzle (4) is connected to the manifold chamber (11).

7. The adjustable nozzle for a side-blown furnace as described in claim 6, characterized in that, The nozzle body (1) is provided with a cleaning port (12) at one end away from the nozzle (4), and a sealing element is provided at the cleaning port (12).

8. The adjustable nozzle for a side-blown furnace as described in claim 7, characterized in that, The sealing element is a one-way valve ball (6). In use, the air pressure in the manifold chamber (11) pushes the one-way valve ball (6) to seal the cleaning port (12). The nozzle body (1) is provided with a temporary storage chamber (13). When the one-way valve ball (6) is placed in the temporary storage chamber (13), the cleaning port (12) is connected to the manifold chamber (11).

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