CN219032230U

CN219032230U - Spray gun for smelting and spraying hydrogen-rich fuel in vanadium titano-magnetite blast furnace

Info

Publication number: CN219032230U
Application number: CN202223188742.0U
Authority: CN
Inventors: 蒋胜; 陈茅; 唐文博; 朱凤湘
Original assignee: Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
Current assignee: Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-05-16
Anticipated expiration: 2032-11-29

Abstract

The utility model relates to a spray gun for smelting and spraying hydrogen-rich fuel in a vanadium titano-magnetite blast furnace, which comprises a spray gun body, wherein the spray gun body consists of an outer layer pipe body, a middle layer pipe body and an inner layer pipe body; the middle layer pipe body is coaxially arranged in the outer layer pipe body at a certain distance; the inner layer pipe body is coaxially arranged in the middle layer pipe body at a certain distance; the inner wall of the front end of the outer layer pipe body is fixedly connected with the outer wall of the front end of the middle layer pipe body through structural rib blocks uniformly distributed in the circumferential direction; the inner wall of the front end of the middle layer pipe body is fixedly connected with the outer wall of the front end of the inner layer pipe body through structural rib blocks uniformly distributed in the circumferential direction. The utility model can fully mix coal powder to improve the combustion rate of the coal powder under the hydrogen-rich condition.

Description

Spray gun for smelting and spraying hydrogen-rich fuel in vanadium titano-magnetite blast furnace

Technical Field

The utility model relates to the technical field of ferrous metallurgy, in particular to a spray gun for blowing hydrogen-rich fuel in the blast furnace smelting of vanadium titano-magnetite.

Background

In the smelting process of the blast furnace, coal dust injection is favorable for reducing the coke ratio and the smelting cost, is a wider measure for saving energy and reducing consumption, along with the implementation of CO2 emission reduction in China, the injection of hydrogen-rich gas into the blast furnace becomes one of effective means for reducing CO2 emission, after the injection of the hydrogen-rich gas into the blast furnace, the temperature of a revolving region of a hearth tuyere is reduced, a certain amount of oxygen is required to be supplemented to compensate the reduction of the theoretical combustion temperature of the revolving region, along with the increase of the hydrogen-rich gas, the combustion rate of coal dust is influenced to a certain extent, the combustion rate of the coal dust is directly influenced by the improvement of the coal ratio and the replacement ratio of the coke, and particularly in the smelting process of vanadium-titanium magnetite, the combustion rate is low, unburned coal dust enters slag, and adverse influence is directly generated on the performance of the slag, so that the smelting of the blast furnace is not smooth. Therefore, how to increase the combustion rate of pulverized coal is important when the blast furnace is injecting hydrogen-rich gas.

Disclosure of Invention

The utility model aims to provide a spray gun for smelting and spraying hydrogen-rich fuel in a vanadium titano-magnetite blast furnace, which can effectively improve the combustion rate of coal dust so as to improve the combustion rate of the coal dust under the hydrogen-rich condition.

The technical scheme adopted by the utility model is as follows:

the utility model provides a spray gun for smelting and spraying hydrogen-rich fuel in a vanadium titano-magnetite blast furnace, which comprises a spray gun body, wherein the spray gun body consists of an outer layer pipe body, a middle layer pipe body and an inner layer pipe body; the middle layer pipe body is coaxially arranged in the outer layer pipe body at a certain distance; the inner layer pipe body is coaxially arranged in the middle layer pipe body at a certain distance; the inner wall of the front end of the outer layer pipe body is fixedly connected with the outer wall of the front end of the middle layer pipe body through structural rib blocks uniformly distributed in the circumferential direction; the inner wall of the front end of the middle layer pipe body is fixedly connected with the outer wall of the front end of the inner layer pipe body through structural rib blocks uniformly distributed in the circumferential direction.

Preferably, the structural rib blocks are inverted triangle rib blocks; the vertex of the inverted triangle rib block points to the direction opposite to the flow direction of the pulverized coal and the hydrogen-rich gas.

Preferably, four structural rib blocks are uniformly distributed between the front ends of the outer layer pipe body and the middle layer pipe body in the circumferential direction; three structural rib blocks are uniformly distributed between the front ends of the middle layer pipe body and the inner layer pipe body in the circumferential direction.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model relates to an inner layer pipe body O ₂ The cavity between the inner layer pipe body and the middle layer pipe body is used for conveying coal dust, the cavity between the outer layer pipe body and the middle layer pipe body is used for conveying hydrogen-rich gas, the problem of insufficient coal dust combustion rate can be solved, oxygen is conveyed through the inner layer pipe body, as the oxygen outlet speed is higher than the wind speed outside the pipe, after oxygen is sprayed out of a muzzle, the coal dust conveyed out of the cavity between the inner layer pipe body and the middle layer pipe body is dispersed, contact with oxygen is enlarged, coal dust and oxygen are fully mixed and combusted, coal dust combustion is more sufficient, and the hydrogen-rich gas of the cavity between the outer layer pipe body and the middle layer pipe body is also beneficial to coal dust diffusion. Meanwhile, the problems of insufficient and uneven coal powder combustion when one gun sprays hydrogen-rich gas are solved.

Drawings

FIG. 1 is a schematic view of an axial cross-sectional structure of the present utility model;

FIG. 2 is a schematic view of a radial cross-sectional structure of the present utility model;

fig. 3 is a schematic view of A-A of fig. 2.

Wherein, the reference numerals: 1-an outer layer tube; 2-middle layer pipe body; 3-inner layer tube body; 4-structural rib blocks.

Detailed Description

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

In the description of the present utility model, it should be noted that the terms "upper," "lower," "top," "bottom," "one side," "another side," "left," "right," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, and do not mean that the device or element must have a specific orientation, be configured and operate in a specific orientation.

Referring to fig. 1, a specific structure of an embodiment of a spray gun for smelting and spraying hydrogen-rich fuel in a vanadium titano-magnetite blast furnace is provided. The spray gun comprises a spray gun body, wherein the spray gun body is formed by sequentially nesting an outer layer pipe body 1, a middle layer pipe body 2 and an inner layer pipe body 3; the middle layer pipe body 2 is coaxially arranged in the outer layer pipe body 1 at a certain distance; the inner layer pipe body 3 is coaxially arranged in the middle layer pipe body 2 at a certain distance; the inner wall of the front end of the outer layer pipe body 1 is fixedly connected with the outer wall of the front end of the middle layer pipe body 2 through structural rib blocks 4 uniformly distributed in the circumferential direction, in the embodiment, the number of the structural rib blocks 4 between the outer layer pipe body 1 and the middle layer pipe body 2 is four, and the four structural rib blocks 4 form included angles of 90 degrees respectively; the inner wall of middle level body 2 front end links firmly through the structure muscle piece 4 of circumference equipartition equally between the outer wall of inlayer body 3 front end, and in this embodiment, the quantity of structure muscle piece 4 between middle level body and the inlayer body is three, is 120 contained angles between three structure muscle piece 4 respectively.

In this embodiment, the structural rib block 4 is an inverted triangle rib block with isosceles shape, and the vertex angle points of the inverted triangle rib block point to the direction opposite to the flow direction of the pulverized coal and the hydrogen-rich gas.

Wherein, during operation, the utility model leads O to the inner layer pipe body 3 ₂ The cavity between the inner layer pipe body 3 and the middle layer pipe body 2 is used for conveying pulverized coal, the cavity between the outer layer pipe body and the middle layer pipe body is used for conveying hydrogen-rich gas, the problem of insufficient pulverized coal combustion rate can be effectively solved, oxygen-rich gas is conveyed through the inner layer pipe body 3, and the oxygen outlet speed is higher than that of the outside of the pipeThe air speed is so that the coal powder conveyed by the cavity between the inner layer pipe body 3 and the middle layer pipe body 2 is dispersed after the oxygen is sprayed out of the muzzle, the contact area between the coal powder and the oxygen is enlarged, the coal powder and the oxygen are fully mixed, the combustion of the coal powder is more sufficient, and the hydrogen-rich gas conveyed by the cavity between the outer layer pipe body 1 and the middle layer pipe body 2 is also beneficial to the diffusion of the coal powder. Meanwhile, the problems of insufficient and uneven coal powder combustion when one gun sprays hydrogen-rich gas are solved.

The utility model is not particularly limited to the known technology.

The above examples are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solution of the present utility model should fall within the scope of protection defined by the claims of the present utility model without departing from the spirit of the design of the present utility model.

Claims

1. The utility model provides a spray gun of blowing hydrogen-rich fuel is smelted to vanadium titano-magnetite blast furnace, includes the spray gun body, its characterized in that: the spray gun body consists of an outer layer pipe body, a middle layer pipe body and an inner layer pipe body; the middle layer pipe body is coaxially arranged in the outer layer pipe body at a certain distance; the inner layer pipe body is coaxially arranged in the middle layer pipe body at a certain distance; the inner wall of the front end of the outer layer pipe body is fixedly connected with the outer wall of the front end of the middle layer pipe body through structural rib blocks uniformly distributed in the circumferential direction; the inner wall of the front end of the middle layer pipe body is fixedly connected with the outer wall of the front end of the inner layer pipe body through structural rib blocks uniformly distributed in the circumferential direction.

2. The spray gun for smelting and spraying hydrogen-rich fuel in a vanadium titano-magnetite blast furnace according to claim 1, wherein the spray gun is characterized in that: the structural rib blocks are inverted triangle rib blocks; the vertex of the inverted triangle rib block points to the direction opposite to the flow direction of the pulverized coal and the hydrogen-rich gas.

3. The spray gun for smelting and spraying hydrogen-rich fuel in a vanadium titano-magnetite blast furnace according to claim 2, which is characterized in that: four structural rib blocks are uniformly distributed between the front ends of the outer layer pipe body and the middle layer pipe body in the circumferential direction; three structural rib blocks are uniformly distributed between the front ends of the middle layer pipe body and the inner layer pipe body in the circumferential direction.