A secondary air nozzle device for an oxygen-enriched side-blown recycled lead smelting furnace

Abstract

This utility model discloses a secondary air nozzle device for an oxygen-enriched side-blown recycled lead smelting furnace, relating to the field of smelting technology. It includes a valve body, an adjusting shaft, and an adjusting device. The adjusting device is fixedly installed on the upper end face of the valve body. The valve body has a mixing chamber and a transition chamber arranged sequentially vertically along the same central axis. An upward-through groove is opened at the center of the upper end face of the mixing chamber, and a downward-through air jet is opened at the center of the lower end face of the transition chamber. The adjusting shaft is slidably and sealed within the groove. A mixing fan blade device is rotatably connected to the adjusting shaft. A flow control valve core is fixedly connected to the lower end of the adjusting shaft. The adjusting shaft and the adjusting device are fixedly connected. The mixing fan blade device is located within the mixing chamber, and the flow control valve core is located within the transition chamber. This device can adjust the position of the flow control valve core via an electric telescopic rod device to precisely control the amount of gas added. The mixing fan blade device simultaneously mixes the gas uniformly, ensuring complete combustion inside the smelting furnace and improving production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of smelting technology, specifically relating to a secondary air nozzle device in an oxygen-enriched side-blown recycled lead smelting furnace. Background Technology

[0002] During the operation of an oxygen-enriched side-blown recycled lead smelting furnace, fuel and flux are blown into the molten pool through the main tuyeres located at the lower part of the furnace sidewall. Their main functions are to stir the molten pool, smelt lead sulfide or lead oxide slag, and provide some oxygen for combustion to maintain basic combustion. Above the molten pool and in the furnace chamber, a large amount of gases containing carbon monoxide, hydrogen, unburned hydrocarbons, sulfides, and other combustible volatiles are generated. Therefore, oxygen-enriched air or a mixed gas needs to be injected into the furnace chamber through secondary air nozzles in the upper middle part of the furnace sidewall. This primarily optimizes combustion within the furnace, improves energy utilization efficiency, enhances furnace atmosphere control, reduces pollution emissions, and ultimately improves lead recovery rate and product quality.

[0003] Patent application CN202111342540.4 discloses an oxygen-enriched side-blown furnace device and process for recycled lead smelting using a composite clean energy source. The integrated mixing jet structure includes a flow-stabilizing nozzle section, a connecting section, and an inlet section. A certain flow rate of oxygen, compressed air, and natural gas is introduced through the inlet section. These three gases are then connected and introduced through the connecting section. The flow-stabilizing nozzle section regulates the flow rate, and the gases are injected into the smelting furnace cavity. Precise control of the three gas quantities improves combustion efficiency, avoids gas resource waste that increases costs, reduces the production cost of recycled lead smelting, and improves profitability. However, in this structure, the three gases cannot be uniformly mixed within the jet structure, which is detrimental to complete combustion inside the smelting furnace. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a secondary air nozzle device for an oxygen-enriched side-blown recycled lead smelting furnace.

[0005] To achieve the above objectives, the specific technical solution of this utility model is as follows:

[0006] A secondary air nozzle device for an oxygen-enriched side-blown recycled lead smelting furnace includes a valve body, an adjusting shaft, and an adjusting device. The adjusting device is fixedly installed on the upper end face of the valve body. The valve body has a mixing chamber and a transition chamber arranged sequentially and vertically along the same central axis. The center of the upper end face of the mixing chamber has an upward through-slot, and the center of the lower end face of the transition chamber has a downward through-slot. The adjusting shaft is slidably and sealed within the through-slot. A mixing fan blade device is rotatably connected to the adjusting shaft. A flow control valve core is fixedly connected to the lower end of the adjusting shaft. The adjusting shaft is fixedly connected to the adjusting device. The mixing fan blade device is located within the mixing chamber, and the flow control valve core is located within the transition chamber.

[0007] As a further feature of the above scheme, the mixing chamber is provided with a first intake valve, a second intake valve and a third intake valve distributed radially. A sealing bushing is provided in the through groove. The sealing bushing is slidably connected to the adjusting shaft in a sealing manner. A nozzle is connected to the lower end of the jet nozzle, and a return spring is fixedly connected to the upper end of the jet nozzle.

[0008] As a further feature of the above solution, the adjusting device includes a mounting bracket, which is fixedly mounted on the upper end face of the valve body. An electric telescopic rod device is fixedly mounted on the mounting bracket and is fixedly connected to the upper end of the adjusting shaft.

[0009] As a further feature of the above scheme, the flow control valve core includes a fixed circular plate. The upper surface of the fixed circular plate is provided with a sealing gasket that is concentrically fixed by a locking platform. The diameter of the sealing gasket is larger than the diameter of the lower port of the mixing chamber. The locking platform is fixedly connected to the lower end of the adjusting shaft. A conical platform is fixedly connected to the lower end of the fixed circular plate. The conical platform is fixedly connected to the upper end of the return spring.

[0010] As a further feature of the above scheme, the hybrid fan blade device includes a hollow rotating shaft, bearings with the same central axis are provided on both ends of the hollow rotating shaft, the bearings are rotatably connected to the adjusting shaft, and axially arranged blades are provided on the outer wall of the hollow rotating shaft.

[0011] This utility model has the following beneficial effects:

[0012] The electric telescopic rod device lowers the flow control valve core via an adjusting shaft, connecting the mixing chamber and the transition chamber. Oxygen, compressed air, and natural gas are added to the mixing chamber in proportion through the first, second, and third inlet valves. When the gas enters the mixing chamber, it directly drives the mixing fan blade device to rotate continuously, agitating and mixing the oxygen, compressed air, and natural gas. Finally, the gas is ejected through the nozzle in the transition chamber. This device can precisely control the amount of gas added by adjusting the position of the flow control valve core via the electric telescopic rod device. The mixing fan blade device simultaneously mixes the gas evenly, ensuring complete combustion inside the smelting furnace and improving production efficiency. Attached Figure Description

[0013] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the appearance of this utility model;

[0015] Figure 3 This is a schematic diagram of the valve body cross-section of this utility model;

[0016] Figure 4 This is an assembly diagram of the regulating shaft, flow control valve core, and mixing fan blade device of this utility model;

[0017] Figure 5 This is a schematic diagram of the flow control valve core of this utility model;

[0018] Figure 6 This is a cross-sectional schematic diagram of the hybrid fan blade device of this utility model.

[0019] 1. Valve body; 101. Mixing chamber; 1011. Through groove; 102. Transition chamber; 1021. Air jet; 103. Sealing bushing; 104. Return spring; 2. First intake valve; 3. Second intake valve; 4. Third intake valve; 5. Adjusting device; 501. Mounting bracket; 502. Electric telescopic rod device; 6. Nozzle; 7. Adjusting shaft; 8. Mixing fan blade device; 801. Hollow rotating shaft; 802. Bearing; 803. Blade; 9. Flow control valve core; 901. Fixed circular plate; 902. Sealing gasket; 903. Locking platform; 904. Conical platform. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-6 This application will be described in detail with reference to the embodiments.

[0022] like Figure 1 As shown, a secondary air nozzle device for an oxygen-enriched side-blown recycled lead smelting furnace includes a valve body 1, an adjusting shaft 7, and an adjusting device 5. The adjusting device 5 is fixedly installed on the upper end face of the valve body 1. The valve body 1 has a mixing chamber 101 and a transition chamber 102 arranged sequentially on the same central axis. The center of the upper end face of the mixing chamber 101 has an upward through groove 1011, and the center of the lower end face of the transition chamber 102 has a downward through air nozzle 1021. The adjusting shaft 7 is slidably connected in a sealed manner in the through groove 1011. A mixing fan blade device 8 is rotatably connected to the adjusting shaft 7. A flow control valve core 9 is fixedly connected to the lower end of the adjusting shaft 7. The adjusting shaft 7 is fixedly connected to the adjusting device 5. The mixing fan blade device 8 is located in the mixing chamber 101, and the flow control valve core 9 is located in the transition chamber 102.

[0023] like Figure 3As shown, the mixing chamber 101 is provided with a first intake valve 2, a second intake valve 3 and a third intake valve 4 arranged radially. A sealing bushing 103 is provided in the through groove 101. The sealing bushing 103 is slidably connected to the adjusting shaft 7 in a sealed manner. A nozzle 6 is connected to the lower end of the jet nozzle 1021 and a return spring 104 is fixedly connected to the upper end of the jet nozzle 1021.

[0024] like Figure 2 As shown, the adjusting device 5 includes a mounting bracket 501, which is fixedly mounted on the upper end face of the valve body 1. An electric telescopic rod device 502 is fixedly mounted on the mounting bracket 501. The electric telescopic rod device 502 is fixedly connected to the upper end of the adjusting shaft 7. The electric telescopic rod device 502 can drive the adjusting shaft 7 to move up and down and precisely control its movement.

[0025] like Figure 4 , Figure 5 As shown, the flow control valve core 9 includes a fixed circular plate 901. The upper end face of the fixed circular plate 901 is provided with a sealing gasket 902 that is concentric and fixed by a locking platform 903. The diameter of the sealing gasket 902 is larger than the diameter of the lower port of the mixing chamber 101. The locking platform 903 is fixedly connected to the lower end of the adjusting shaft 7. A conical platform 904 is fixedly connected to the lower end face of the fixed circular plate 901. The conical platform 904 is fixedly connected to the upper end of the return spring 104.

[0026] like Figure 6 As shown, the hybrid fan blade device 8 includes a hollow rotating shaft 801. Bearings 802 with the same central axis are provided on both ends of the hollow rotating shaft 801. The bearings 802 are rotatably connected to the adjusting shaft 7. The outer wall of the hollow rotating shaft 801 is provided with axially arranged blades distributed in a circular pattern. The hybrid fan blade device 8 is axially limited on the adjusting shaft 7.

[0027] The working process of this utility model is as follows: The electric telescopic rod device 502 drives the flow control valve core 9 to descend through the adjusting shaft 7, and the mixing chamber 101 is connected to the transition chamber 102. At the same time, oxygen, compressed air and natural gas are added to the mixing chamber 101 in proportion through the first intake valve 2, the second intake valve 3 and the third intake valve 4. When the gas enters the mixing chamber 101, it is blown directly onto the blades 803, thereby driving the mixing fan blade device 8 to rotate as a whole, disturbing and mixing the oxygen, compressed air and natural gas, and finally spraying it out through the nozzle 6 through the transition chamber 102.

[0028] Since the air output of the first intake valve 2, the second intake valve 3, and the third intake valve 4 are different, the mixing fan blade device 8 will not stop rotating due to the force of the balance. When the first intake valve 2, the second intake valve 3, and the third intake valve 4 stop supplying air, the electric telescopic rod device 502 closes. Under the action of the return spring 104, the sealing gasket 902 moves upward and abuts against the lower port of the mixing chamber 101, isolating the mixing chamber 101 from the transition chamber 102, thus realizing the closing operation of the device.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

Claims

1. A secondary air nozzle device for an oxygen-enriched side-blown secondary lead smelting furnace, comprising a valve body, an adjusting shaft and an adjusting device, characterized in that The regulating device is fixedly installed on the upper end face of the valve body. The valve body has a mixing chamber and a transition chamber arranged sequentially on the same central axis. The center of the upper end face of the mixing chamber has an upward through groove, and the center of the lower end face of the transition chamber has a downward through air nozzle. The regulating shaft is slidably connected in the through groove. A mixing fan blade device is rotatably connected to the regulating shaft. A flow control valve core is fixedly connected to the lower end of the regulating shaft. The regulating shaft is fixedly connected to the regulating device. The mixing fan blade device is located in the mixing chamber, and the flow control valve core is located in the transition chamber.

2. The secondary air nozzle device inside the oxygen-enriched side-blown recycled lead smelting furnace according to claim 1, characterized in that, The mixing chamber is provided with a first intake valve, a second intake valve and a third intake valve distributed radially. A sealing bushing is provided in the through groove. The sealing bushing is slidably connected to the adjusting shaft. A nozzle is connected to the lower end of the jet nozzle and a return spring is fixedly connected to the upper end of the jet nozzle.

3. The secondary air nozzle device inside the oxygen-enriched side-blown recycled lead smelting furnace according to claim 1, characterized in that, The adjusting device includes a mounting bracket, which is fixedly installed on the upper surface of the valve body. An electric telescopic rod device is fixedly installed on the mounting bracket and is fixedly connected to the upper end of the adjusting shaft.

4. The secondary air nozzle device inside the oxygen-enriched side-blown recycled lead smelting furnace according to claim 2, characterized in that, The flow control valve core includes a fixed circular plate. The upper surface of the fixed circular plate is provided with a sealing gasket that is concentric and fixed by a locking platform. The diameter of the sealing gasket is larger than the diameter of the lower port of the mixing chamber. The locking platform is fixedly connected to the lower end of the adjusting shaft. A conical platform is fixedly connected to the lower end of the fixed circular plate. The conical platform is fixedly connected to the upper end of the return spring.

5. The secondary air nozzle device inside the oxygen-enriched side-blown recycled lead smelting furnace according to claim 1, characterized in that, The hybrid fan blade device includes a hollow rotating shaft, bearings with the same central axis are provided on both ends of the hollow rotating shaft, the bearings are rotatably connected to the adjusting shaft, and axially arranged blades are provided on the outer wall of the hollow rotating shaft.

Images