Converter vaporization flue spray gun

Abstract

The utility model discloses a converter vaporization flue spray gun, and belongs to the technical field of metallurgical equipment. The converter vaporization flue spray gun specifically and structurally comprises a gun head, a material pipeline and a gun barrel. The gun barrel is a hollow pipe body defined by a pipe wall. The material pipeline is arranged in the hollow pipe body in the axial direction of the gun barrel; an interlayer cavity for cooling gas circulation is formed between the outer wall of the material pipeline and the inner wall of the hollow pipe body; the same ends of the material pipeline and the gun barrel are jointly connected with a gun head; the gun head comprises an annular cylinder and a gun head spray hole defined by the annular cylinder. The annular column body comprises a column body inner cavity and a column body outer wall, the column body inner cavity is communicated with the interlayer cavity, and at least one through hole used for discharging cooling gas is formed in the side, facing the gun head spraying hole, of the column body outer wall. The spray gun is designed to be in a jacket form, nitrogen cooling gas is blown into the jacket, and the spray holes of the gun head blow a reaction medium, so that the blowing effect is improved, the spray gun is suitable for small-diameter vaporization flues, and the airflow temperature is high.

Description

Technical Field

[0001] The present application relates to a converter vaporization flue lance, belonging to the technical field of metallurgical equipment. Background Art

[0002] The converter is a type of steelmaking equipment primarily used to remove impurities through oxidation reactions. The converter is typically a tiltable cylindrical container that uses blasted air, pure oxygen, or pure oxygen plus fuel oil (such as natural gas, water vapor, or carbon dioxide) to oxidize impurities in liquid metal and generate the required heat energy. In the converter's vaporization flue, the spray gun coordinates the solid waste powder injection start time, duration, feed rate, and adjustment timing, linked to the converter's gun down signal, oxygen blowing signal, stop signal, oxygen supply intensity, flue gas temperature, and O2 and CO2 content in the flue gas, to control powder and energy medium consumption and convert the carbon in the powder. The design of the spray gun is crucial. The converter vaporization flue currently usually adopts the structure of the blast furnace coal injection gun, but in actual application, the blast furnace coal injection gun structure is not suitable for converter injection, and the injection effect is not good: the blast furnace coal injection gun sprays coal powder into the vaporization flue, the material flow rate is fast and the thickness is thick, the reaction is insufficient, and it is easy to accumulate on the inner wall of the vaporization flue, affecting the flue gas flow of the vaporization flue and reducing the reaction efficiency of the flue gas and material. The amount of injected material is large, which further affects the dust removal effect of the subsequent dust removal equipment. Utility Model Content

[0003] In order to solve the problem of poor structural blowing effect of the converter vaporization flue in the existing technology, this application develops and designs a technical solution for a special spray gun for the converter vaporization flue based on the flue gas environment in the converter vaporization flue. The material blowing angle is large, and the spraying is along the airflow. The thickness of the solid waste raw material is thin, and it is fully combined with the converter flue gas and reacts thoroughly. The rotary feeder that adjusts the feeding amount in real time adjusts the feeding amount to realize the design concept of "spraying as much as needed".

[0004] This application adopts the following technical solutions:

[0005] According to one aspect of the present application, a converter vaporization flue lance is provided, comprising a lance head and a lance body having a jacket structure;

[0006] The gun body with a jacket structure includes a material pipeline and a gun rod;

[0007] The gun barrel is a hollow tube surrounded by a tube wall;

[0008] The material pipeline is arranged in the hollow tube along the axial direction of the gun barrel;

[0009] An interlayer cavity for cooling gas to flow is formed between the outer wall of the material pipeline and the inner wall of the hollow tube;

[0010] The material pipeline and the same end of the gun rod are connected together to form a gun head;

[0011] The gun head includes an annular cylinder and a gun head spray hole surrounded by the annular cylinder;

[0012] The annular cylinder includes an inner cavity and an outer wall, wherein the inner cavity is connected to the interlayer cavity to form a cooling gas exhaust channel, and at least one through hole for exhausting cooling gas is provided on the outer wall of the cylinder facing the nozzle of the gun head;

[0013] The spray hole of the gun head is connected to the end face of the material pipeline;

[0014] A cooling gas pipeline connected to the jacket structure is provided on an end portion of the gun rod away from the gun head.

[0015] Optionally, the nozzle hole of the gun tip comprises a radial hole whose side wall forms an angle α with the axis.

[0016] Optionally, the angle α is 15 to 35 degrees.

[0017] Optionally, the interlayer thickness of the interlayer cavity is 0.6 to 1.5 cm.

[0018] Optionally, the radial dimension of the gun barrel is 6 to 9 cm.

[0019] Optionally, the inner diameter of the material pipeline is 1.5 to 2.3 cm; and the minimum inner diameter of the nozzle hole of the gun head is 0.5 to 1 cm.

[0020] Optionally, one end of the material pipeline away from the gun head is connected to an external carbon-containing solid waste raw material supply pipeline.

[0021] Optionally, one end of the cooling gas pipeline away from the gun rod is connected to an external cooling gas supply pipeline.

[0022] Optionally, a flange for connecting to a converter vaporization flue is provided on the outer side of the lance.

[0023] Optionally, the flange is fixedly connected to a welding sleeve provided on the wall of the converter vaporization flue so that the gun head and a portion of the gun body close to one end of the gun head are located inside the converter vaporization flue.

[0024] The beneficial effects of this application include:

[0025] The converter vaporization flue spray gun provided by the present application is adapted to the characteristics of small diameter of the vaporization flue and high air flow temperature. The dust removal ash is sprayed into the vaporization flue through the special spray gun, and the carbon is fully contacted and fused with the high-temperature flue gas inside the vaporization flue. The reaction surface is large, the converter gas recovery amount is increased, and it is easy to improve the calorific value of the converter gas, and it is easier to achieve converter gas recovery. The reaction process is safe, the production is efficient, low-consumption and green and environmentally friendly, and the emission of greenhouse gases (CO, CO2) to the atmosphere is reduced. The converter vaporization flue spray gun provided by the present application is used to spray carbon-containing solid waste raw materials (coke screening dust removal ash), and the converter special blowing system is used to accurately control the powder and energy medium consumption, which can greatly reduce the material blowing amount, reduce operating costs, and fully convert the carbon in the powder while reducing the pressure on the converter primary dust removal system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the converter vaporization flue lance for this application.

[0027] Figure ID

[0028] 1. Material pipeline; 2. Gun barrel; 3. Gun head; 4. Cooling gas pipeline; 5. Flange; 6. Cooling gas exhaust channel; 7. Material outlet; 8. Welding sleeve. DETAILED DESCRIPTION

[0029] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0030] Unless otherwise specified, the raw materials in the examples of this application were purchased through commercial channels.

[0031] According to one embodiment of the present application, the converter vaporization flue spray gun includes a gun head 3 and a gun body with a jacket structure. Considering the temperature resistance and wear resistance, 310s stainless steel is selected as the gun body material. In addition, considering that the gun body and the gun head are exposed to an environment exceeding 1000°C for a long time in the vaporization flue, the gun body is designed as a jacket structure. Nitrogen cooling gas is sprayed in the jacket, and the reaction medium is sprayed through the center hole.

[0032] The gun body with a jacket structure includes a material pipeline 1 and a gun rod 2; the gun rod 2 is a hollow tube surrounded by a tube wall, with a radial dimension of 6 to 9 cm; the material pipeline 1 is arranged in the hollow tube along the axial direction of the gun rod 2, and the inner diameter of the material pipeline 1 is 1.5 to 2.3 cm; a 0.6 to 1.5 cm thick interlayer cavity is formed between the outer wall of the material pipeline 1 and the inner wall of the hollow tube for the circulation of cooling gas; the material pipeline 1 and the gun rod 2 are connected to the same end with a gun head 3; the gun head 3 includes an annular column and a gun head nozzle surrounded by the annular column. The hole serves as the material outlet 7, the minimum inner diameter of the gun head nozzle is 0.5 to 1 cm, and the nozzle includes a radial hole whose side wall forms an angle of 15 to 35 degrees with the axis; the annular cylinder includes an inner cavity of the cylinder and an outer wall of the cylinder, the inner cavity of the cylinder is connected to the interlayer cavity to form a cooling gas exhaust channel 6, and at least one through hole for discharging cooling gas is provided on the side of the outer wall of the cylinder facing the gun head nozzle; the gun head nozzle is connected to the end face of the material pipeline 1; a cooling gas pipeline 4 connected to the jacket structure is provided on the end of the gun rod 2 away from the gun head 3.

[0033] The end of the material pipeline 1 away from the gun head 3 is connected to the external carbon-containing solid waste raw material supply pipeline. The end of the cooling gas pipeline 4 away from the gun rod 2 is connected to the external cooling gas supply pipeline. A flange 5 for connection to the converter vaporization flue is provided on the outside of the gun rod 2. The flange 5 is fixedly connected to the welding sleeve 8 provided on the wall of the converter vaporization flue so that the gun head 3 and the part of the gun body near the end of the gun head 3 are located inside the converter vaporization flue. Considering the influence of the converter flue gas flow, the spray gun installed on the vaporization flue is away from the oxygen gun mouth and the discharge port, and is located in the direction of the flue gas flow to reduce interference with the flue gas circulation.

[0034] The above descriptions are merely a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application discloses the preferred embodiments as above, they are not intended to limit the present application. Any technical personnel familiar with the present profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A converter gasification flue lance, characterized in that: It includes a gun head and a gun body with a jacket structure; The gun body with a jacket structure includes a material pipeline and a gun rod; The gun barrel is a hollow tube surrounded by a tube wall; The material pipeline is arranged in a hollow tube along the axial direction of the gun barrel; An interlayer cavity for cooling gas to flow is formed between the outer wall of the material pipeline and the inner wall of the hollow tube; The material pipeline and the same end of the gun rod are connected together to form a gun head; The gun head includes an annular cylinder and a gun head spray hole surrounded by the annular cylinder; The annular cylinder includes an inner cavity and an outer wall, the inner cavity is connected to the interlayer cavity, and at least one through hole for discharging cooling gas is provided on the side of the outer wall of the cylinder facing the nozzle of the gun head; The spray hole of the gun head is connected to the end face of the material pipeline; A cooling gas pipeline connected to the jacket structure is provided on an end portion of the gun rod away from the gun head.

2. The converter gasification flue lance according to claim 1, characterized in that: The gun tip spray hole comprises a radial hole whose side wall forms an angle α with the axis.

3. The converter gasification flue lance according to claim 2, characterized in that: The α angle is 15 to 35 degrees.

4. The converter gasification flue lance according to claim 1, characterized in that: The interlayer thickness of the interlayer cavity is 0.6 to 1.5 cm.

5. The converter gasification flue lance according to claim 1, characterized in that: The radial dimension of the gun barrel is 6 to 9 cm.

6. The converter gasification flue lance according to claim 1, characterized in that: The inner diameter of the material pipeline is 1.5 to 2.3 cm; The minimum inner diameter of the nozzle hole of the gun tip is 0.5 to 1 cm.

7. The converter gasification flue lance according to claim 1, characterized in that: One end of the material pipeline away from the gun head is connected to an external carbon-containing solid waste raw material supply pipeline.

8. The converter gasification flue lance according to claim 1, characterized in that: One end of the cooling gas pipeline away from the gun rod is communicated with an external cooling gas supply pipeline.

9. The converter gasification flue lance according to claim 1, characterized in that: The outer side of the gun rod is provided with a flange for connecting with the converter vaporization flue.

10. The converter gasification flue lance according to claim 9, characterized in that: The flange is fixedly connected to a welding sleeve arranged on the wall of the converter vaporization flue so that the gun head and a part of the gun body close to one end of the gun head are located inside the converter vaporization flue.

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