Gas-solid mixing structure for bottom of cupola furnace

Abstract

The gas-solid mixing structure for the cupola bottom comprises a base defining a mixing cavity, a gas inlet pipe communicated with the mixing cavity is arranged on the side wall of the base, a top plate is arranged at the top of the base, a gas guide pipe is slidably arranged on the top plate in a penetrating mode, a spring is compressed between the lower end of the gas guide pipe and the top plate, and a sealing cover is arranged at the upper end of the gas guide pipe. And an oxygen outlet is formed in the side wall of the gas guide pipe below the sealing cover. Oxygen is fed into the mixing cavity through the air inlet pipe, along with the increase of the pressure of the oxygen in the mixing cavity, the elastic force of the spring can be overcome to push the guide pipe upwards until the oxygen outlet moves to the position above the top plate and communicates with the cupola furnace, and the oxygen enters the cupola furnace through the oxygen outlet and is mixed with molten iron; along with the reduction of the oxygen pressure in the mixing cavity, the spring can push the air guide pipe to move downwards until the sealing cover is attached to the surface of the top plate, and automatic sealing of the oxygen outlet is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of cupola furnaces, and in particular to a gas-solid mixing structure for a cupola furnace bottom. Background Art

[0002] The cupola is an important equipment for rock wool processing. During the processing, the molten iron gathered at the bottom of the furnace needs to be discharged regularly. Since there is still a certain amount of iron in the molten iron, direct discharge will cause waste. The patent with announcement number CN220624911U discloses a gas-solid mixing device and cupola for the bottom of a cupola. It allows oxygen to enter the cupola through the oxygen outlet at a uniform flow rate, and fully reacts with the molten iron to reduce the iron content when the molten iron is discharged, thereby improving energy utilization. However, when the above patent is implemented, it only prevents the molten iron from flowing into the annular cavity through the oxygen outlet by maintaining a certain oxygen pressure. This method will increase the oxygen consumption and the flow-stopping effect is not good. For this reason, the invention proposes a gas-solid mixing structure for the bottom of a cupola. Utility Model Content

[0003] The purpose of the present application is to provide a gas-solid mixing structure for a cupola furnace bottom, which can automatically close the oxygen outlet when the gas pressure decreases and has the advantage of simple operation.

[0004] The embodiment of the present application is implemented as follows:

[0005] The present application provides a gas-solid mixing structure for a cupola furnace bottom, comprising a base defining a mixing chamber, a side wall of the base being provided with an air inlet pipe communicating with the mixing chamber, a top plate being provided on the top of the base, an air guide pipe being slidably penetrated on the top plate, a spring being compressed between the lower end of the air guide pipe and the top plate, a sealing cover being provided at the upper end of the air guide pipe, and an oxygen outlet being provided on the side wall of the air guide pipe below the sealing cover.

[0006] The present application delivers oxygen into the mixing chamber through an air inlet pipe. As the oxygen pressure in the mixing chamber increases, the elastic force of the spring is overcome to push the guide tube upward until the oxygen outlet moves to the top of the top plate and is connected to the cupola. Oxygen enters the cupola through the oxygen outlet and mixes with the molten iron. As the oxygen pressure in the mixing chamber decreases, the spring pushes the air guide tube downward until the sealing cover fits the surface of the top plate, thereby achieving automatic closure of the oxygen outlet.

[0007] In an optional embodiment, an annular guide plate is provided in the mixing chamber.

[0008] In an optional embodiment, the guide plate is coaxially arranged with the mixing chamber.

[0009] In an optional embodiment, the guide plate covers the inner port of the air intake pipe.

[0010] In an optional embodiment, a mounting hole for passing the air duct is provided on the top plate.

[0011] In an optional embodiment, the axis of the mounting hole remains parallel to the axis of the guide plate.

[0012] In an optional embodiment, a baffle for blocking the spring is provided at the lower end of the air guide tube.

[0013] In an optional embodiment, the baffle is configured in a ring shape coaxially arranged with the air guide tube.

[0014] In an optional embodiment, the sealing cover is integrally configured to be in a cone shape coaxially arranged with the air guide tube.

[0015] In an optional embodiment, the axis of the oxygen outlet is arranged along the radial direction of the airway tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the embodiments described below are only used to explain the present application, rather than to limit the scope of the present application. In the accompanying drawings:

[0017] Figure 1 is a schematic diagram of a gas-solid mixing structure for a cupola furnace bottom according to an embodiment of the present application;

[0018] Figure 2 is a schematic diagram of installing an airway according to an embodiment of the present application;

[0019] Reference numerals:

[0020] 10. Base;

[0021] 20. Top plate;

[0022] 30. Airway;

[0023] 11. Mixing chamber;

[0024] 12. Guide plate;

[0025] 13. Intake pipe;

[0026] 21. Mounting hole;

[0027] 31. Baffle;

[0028] 32. Sealing cover;

[0029] 33. Oxygen outlet;

[0030] 34. Spring. DETAILED DESCRIPTION

[0031] Example 1

[0032] See also Figure 1-Figure 2 This embodiment provides a gas-solid mixing structure for a cupola furnace bottom to solve the problem of poor flow-stopping effect of the oxygen outlet of the gas-solid mixing device of the existing punch furnace.

[0033] In the present embodiment, the gas-solid mixing structure for the bottom of the cupola furnace includes a base 10 that defines a mixing chamber 11, the side wall of the base 10 is provided with an air inlet pipe 13 that is connected to the mixing chamber 11, the top of the base 10 is provided with a top plate 20, an air guide pipe 30 is slidably passed through the top plate 20, a spring 34 is compressed between the lower end of the air guide pipe 30 and the top plate 20, a sealing cover 32 is provided at the upper end of the air guide pipe 30, and an oxygen outlet 33 is provided on the side wall of the air guide pipe 30 below the sealing cover 32.

[0034] In this embodiment, oxygen is delivered into the mixing chamber 11 via the air inlet pipe 13. As the oxygen pressure in the mixing chamber 11 increases, the elastic force of the spring 34 is overcome to push the guide tube 30 upward until the oxygen outlet 33 moves to the top of the top plate 20 and communicates with the cupola. Oxygen enters the cupola through the oxygen outlet 33 and mixes with the molten iron. As the oxygen pressure in the mixing chamber 11 decreases, the spring 34 pushes the air guide tube 30 downward until the sealing cover 32 is attached to the surface of the top plate 20, thereby achieving automatic closure of the oxygen outlet 33.

[0035] It should be noted that the gas-solid mixing device is integrally arranged at the bottom of the cupola, and is used to input oxygen into the interior of the cupola. The interior of the base 10 defines a cylindrical mixing chamber 11, and an annular guide plate 12 is fixedly connected to the inner wall of the mixing chamber 11. The guide plate 12 and the mixing chamber 11 are coaxially arranged, and the guide plate 12 is integrally constructed in a funnel shape, with the narrower end of the guide plate 12 facing downward, the air inlet pipe 13 is evenly distributed on the outer periphery of the base 10, and the guide plate 12 covers the inner port of the air inlet pipe 13, and the guide plate 12 is used to guide the oxygen flowing into the mixing chamber 11 to flow downward along the outer wall of the guide plate 12, and generate turbulence after mixing in the mixing chamber 11 to reduce the oxygen flow rate.

[0036] In addition, the top plate 20 is sealed and connected to the top of the mixing chamber 11, and the top plate 20 as a whole is arranged vertically with the axis of the mixing chamber 11. A plurality of mounting holes 21 are evenly arranged on the top plate 20, and the axis of the mounting hole 21 is parallel to the axis of the guide plate 12. The air guide pipe 30 is a hollow pipe, and the air guide pipe 30 as a whole can be slidably penetrated inside the mounting hole 21, and the air guide pipe 30 and the mounting hole 21 are kept in a sealed connection. An annular baffle 31 is fixed to the lower end of the air guide pipe 30, and the baffle 31 is coaxially arranged with the air guide pipe 30, and the outer diameter of the baffle 31 is larger than the mounting hole. 21 in diameter, a spring 34 is sleeved on the outside of the air duct 30, and the spring 34 is compressed between the baffle 31 and the lower surface of the top plate 20, and the spring 34 is used to generate a downward elastic thrust on the air duct 30; a conical sealing cover 32 is fixedly connected to the upper end of the air duct 30, and the sealing cover 32 and the air duct 30 are coaxially arranged, the larger end of the sealing cover 32 is located below the smaller end thereof, the outer diameter of the larger end of the sealing cover 32 is larger than the diameter of the mounting hole 21, and the lower end surface of the sealing cover 32 can fit with the upper surface of the top plate 20, thereby achieving the closure of the mounting hole 21.

[0037] In addition, a plurality of oxygen outlets 33 are evenly distributed on the circumferential surface of the air duct 30 below the sealing cover 32, and the axes of the oxygen outlets 33 are arranged radially along the air duct 30, and the plurality of oxygen outlets 33 are arranged on the same circumference. When the sealing cover 32 is fitted with the top plate 20, the oxygen outlets 33 retreat into the mounting hole 21. At this time, the oxygen outlets 33 are in a closed state, and the mixing chamber 11 and the cupola are no longer connected.

[0038] During use, oxygen flows into the mixing chamber 11 through the air inlet pipe 13. As the oxygen pressure in the mixing chamber 11 continues to increase, the elastic force of the spring 34 will be overcome and the air guide pipe 30 will be pushed upward as a whole until the oxygen outlet 33 moves to the top of the top plate 20 and is connected to the punch furnace. At this time, oxygen flows into the punch furnace through the oxygen outlet and mixes with the molten iron; as the oxygen pressure in the mixing chamber 11 decreases, the spring 34 will push the air guide pipe 30 to move downward as a whole until the oxygen outlet 33 is completely retracted into the mounting hole 21, and the sealing cover 32 is fitted with the upper surface of the top plate 20. At this time, the oxygen outlet 33 and the mounting hole 21 are both in a closed state, and the molten iron in the cupola cannot flow into the mixing chamber 11.

[0039] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A gas-solid mixing structure for a cupola furnace bottom, characterized in that: The invention comprises a base defining a mixing chamber, wherein the side wall of the base is provided with an air inlet pipe communicating with the mixing chamber, the top of the base is provided with a top plate, an air guide pipe is slidably passed through the top plate, a spring is compressed between the lower end of the air guide pipe and the top plate, a sealing cover is provided at the upper end of the air guide pipe, and an oxygen outlet is provided on the side wall of the air guide pipe below the sealing cover.

2. The gas-solid mixing structure for the cupola furnace bottom according to claim 1, characterized in that: An annular guide plate is arranged in the mixing chamber.

3. The gas-solid mixing structure for the cupola furnace bottom according to claim 2, characterized in that: The guide plate is coaxially arranged with the mixing chamber.

4. The gas-solid mixing structure for the cupola furnace bottom according to claim 3, characterized in that: The guide plate covers the inner port of the air inlet pipe.

5. The gas-solid mixing structure for the cupola furnace bottom according to claim 4, characterized in that: The top plate is provided with a mounting hole for passing the air guide pipe.

6. The gas-solid mixing structure for the cupola furnace bottom according to claim 5, characterized in that: The axis of the mounting hole is kept parallel to the axis of the guide plate.

7. The gas-solid mixing structure for the cupola furnace bottom according to claim 6, characterized in that: A baffle plate for blocking the spring is provided at the lower end of the air guide pipe.

8. The gas-solid mixing structure for the cupola furnace bottom according to claim 7, characterized in that: The baffle is configured in a ring shape coaxially arranged with the air guide tube.

9. The gas-solid mixing structure for the cupola furnace bottom according to claim 8, characterized in that: The sealing cover is integrally configured to be in a cone shape coaxially arranged with the air guide tube.

10. The gas-solid mixing structure for the cupola furnace bottom according to claim 9, characterized in that: The axis of the oxygen outlet is arranged along the radial direction of the air guide tube.

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