CN217988942U

CN217988942U - Oxygen-enriched mixer used in front of iron and steel smelting blast furnace

Info

Publication number: CN217988942U
Application number: CN202221821023.5U
Authority: CN
Inventors: 许佩; 党延民; 白鹏; 冯林; 杨卫锋; 耿荣刚
Original assignee: Shaanxi Longmen Iron and Steel Co Ltd
Current assignee: Shaanxi Longmen Iron and Steel Co Ltd
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2022-12-09
Anticipated expiration: 2032-07-14

Abstract

The utility model relates to a front oxygen-enriched mixer for a steel smelting blast furnace, which comprises a mixing tube cavity, an air inlet pipe and a mixed gas outlet pipe which are coaxial and communicated with each other; still include air current equipartition ware and oxygen conveyer pipe, the coaxial setting of oxygen outlet end pipeline of air current equipartition ware and oxygen conveyer pipe has evenly arranged first guide plate in the outer wall week of oxygen outlet end pipeline evenly arranged the circumference of air current equipartition ware in have the second guide plate, first guide plate be used for with the air that gets into in the mixing tube intracavity evenly distributed after through first guide plate in the mixing tube intracavity, mix with oxygen outlet end pipeline exhaust oxygen, the gas after the mixture passes through the even water conservancy diversion of air current equipartition ware again to the second guide plate, the gas mixture is discharged by the gas mixture outlet pipe at mixing tube intracavity rear end behind the second guide plate evenly distributed. The utility model discloses effectively guarantee the homogeneous mixing of oxygen and air, provide the guarantee for the further use of blast furnace.

Description

Oxygen-enriched mixer used in front of iron and steel smelting blast furnace

Technical Field

The utility model belongs to equipment in the field of iron and steel blast furnace smelting, in particular to a high-efficiency oxygen-enriched oxygen mixer used in front of an iron and steel smelting blast furnace.

Background

In recent years, the steel industry has excess production energy, and the environment-friendly and energy-saving situation is very severe. In order to adapt to the current situations of capacity removal, supply side reformation, energy conservation, consumption reduction and environmental protection, the combustion-supporting property of oxygen is widely applied to the metal smelting industry. In order to improve the theoretical temperature of the blast furnace so as to strengthen the combustion of injected fuel in front of a tuyere and further achieve the purpose of increasing the ironmaking yield and the smelting strength, the modern blast furnace adopts an oxygen-enriched air blast technology. The blast furnace oxygen enrichment blast mode comprises post-machine oxygen enrichment and pre-machine oxygen enrichment, and the post-machine oxygen enrichment is a mode which is more adopted by many iron and steel enterprises. After years of practice, a large amount of compressed oxygen is consumed in the post-machine oxygen enrichment process, which causes a large amount of electric energy consumption. In recent years, the steel industry has excess production energy, and the environment-friendly and energy-saving situation is very severe. In order to adapt to the current situations of capacity removal, supply side reformation, energy conservation, consumption reduction and environmental protection, and relieve the double pressure of cost and environmental protection, an after-machine oxygen enrichment mode is gradually eliminated, and a more energy-saving before-machine oxygen enrichment technology is gradually popularized and applied in more and more iron and steel enterprises. The air-oxygen mixer is an important device for oxygen enrichment in front of the machine, and the uniform mixing degree has certain influence on the oxygen enrichment rate of the blast furnace.

Disclosure of Invention

The utility model aims to avoid the defects of the prior art and provide the oxygen-enriched mixer used in the front of the iron and steel smelting blast furnace.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an oxygen-enriched mixer used in front of a steel smelting blast furnace machine comprises a mixer shell, wherein a mixing pipe cavity for mixing air and oxygen is arranged in the mixer shell, an air inlet pipe and a mixed gas outlet pipe are coaxially arranged at two ends of the mixer shell, and the air inlet pipe and the mixed gas outlet pipe are communicated with the mixing pipe cavity;

the device also comprises an airflow uniform distributor and an oxygen conveying pipe, wherein the airflow uniform distributor is arranged in the mixing pipe cavity and is coaxial with the mixing pipe cavity; the oxygen inlet end pipeline of the oxygen conveying pipe is arranged outside the mixer shell, the oxygen outlet end pipeline of the oxygen conveying pipe is communicated to the mixing pipe cavity through a connecting pipeline and is coaxially arranged with the airflow uniform distributor, and the airflow uniform distributor is used for uniformly guiding oxygen discharged from the oxygen outlet end pipeline into the mixing pipe cavity;

a plurality of first guide plates are uniformly arranged in the circumferential direction of the outer wall of the oxygen outlet end pipeline, a plurality of second guide plates are uniformly arranged in the circumferential direction of the air flow uniform distributor, the first guide plates are used for uniformly distributing air axially entering the mixing tube cavity in the mixing tube cavity after passing through the first guide plates, the air flow uniform distributor is used for uniformly guiding mixed gas of the air at the rear end of the first guide plates and the oxygen to the second guide plates, and the second guide plates are used for uniformly distributing the mixed gas at the rear end of the mixing tube cavity and finally discharged through a mixed gas outlet pipe.

Furthermore, the air flow distributor is a hemispherical air flow guide cover, the hemispherical cambered surface of the air flow distributor is correspondingly arranged at the opening of the oxygen outlet end pipeline, one end of the second guide plate is fixedly connected to the hemispherical surface of the air flow distributor, and the other end of the second guide plate is fixedly connected to the inner wall of the mixing cavity.

Furthermore, the first guide plate axially extends between the outer wall of the oxygen outlet end pipeline and the inner cavity wall of the mixing cavity, and the second guide plate axially extends between the outer wall of the airflow uniform distributor and the inner cavity wall of the mixing cavity.

Furthermore, the first guide plate is evenly distributed with at least three on the outer wall circumferential surface of the oxygen outlet end pipeline, the second guide plate is evenly distributed with at least three on the circumference of the air flow distributor, the angle difference of the first guide plate and the second guide plate in the circumference direction is alpha, and the alpha is 30-60 degrees.

Furthermore, first guide plate evenly arranged 6 on the outer wall circumference face of oxygen outlet end pipeline, second guide plate evenly arranged 6 in airflow uniform distributor circumference, the angular difference alpha between first guide plate and the second guide plate is 60 degrees.

Furthermore, one end of the mixer shell is communicated with the air inlet pipe through a first taper pipe, the other end of the mixer shell is communicated with the mixed gas outlet pipe through a second taper pipe, the diameter of a pipe cavity from the air inlet pipe to the first taper pipe of the mixer shell is gradually enlarged, and the diameter of a pipe cavity from the mixer shell to the second taper pipe of the mixer outlet pipe is gradually reduced.

Furthermore, the air inlet pipe, the first taper pipe, the mixer shell, the second taper pipe and the mixed gas outlet pipe are coaxially and integrally arranged in sequence.

Furthermore, a support for supporting the mixer housing is arranged on the mixer housing.

Further, the diameters of the air inlet pipe and the mixed gas outlet pipe are 2000mm-2500mm; the diameter of the mixing tube cavity is 2500mm-3000mm.

Furthermore, the oxygen inlet end pipeline is arranged right above the mixer shell and is arranged in parallel in the axial direction.

The beneficial effects of the utility model are that: the utility model discloses simple structure, the air and the oxygen that the guide plate that sets up through axial extension will get into the hybrid chamber have carried out even mixture, guarantee gaseous homogeneous mixing, for further blast furnace uses provides the guarantee, and installation, convenient to use.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic cross-sectional view of the AA of fig. 1 according to the present invention.

In the figure: 1. an air inlet pipe; 21. a first taper pipe; 22. a second tapered tube; 3. an oxygen delivery pipe; 31. an oxygen outlet end pipeline; 4. a first baffle; 5. an airflow uniform distributor; 6. a second baffle; 7. a mixer housing; 71. a mixing lumen; 9. a support; 10. an oxygen inlet end pipeline; 11. and a mixed gas outlet pipe.

Detailed Description

The principles and features of the present invention will be described with reference to the drawings, which are provided for illustration only and are not intended to limit the scope of the invention.

In order to achieve the above object, the present invention provides the following embodiments:

example 1: an oxygen-enriched mixer used in front of a steel smelting blast furnace machine comprises a mixer shell 7, a mixing tube cavity 71 used for mixing air and oxygen is arranged in the mixer shell 7, two ends of the mixer shell 7 are communicated with the mixing tube cavity 71, and an air inlet pipe 1 and a mixed gas outlet pipe 11 are coaxially arranged; one end of the mixer case 7 communicates with the air inlet pipe 1 through a first taper pipe 21, and the other end of the mixer case 7 communicates with the mixed gas outlet pipe 11 through a second taper pipe 22, and the diameter of the pipe cavity of the first taper pipe 21 from the air inlet pipe 1 to the mixer case 7 is gradually enlarged, and the diameter of the pipe cavity of the second taper pipe 22 from the mixer case 7 to the mixer outlet pipe 11 is gradually reduced. The air inlet pipe 1, the first taper pipe 21, the mixer case 7, the second taper pipe 22, and the mixed gas outlet pipe 11 are coaxially and integrally provided in this order. The diameters of the air inlet pipe 1 and the mixed gas outlet pipe 11 are 2000mm-2500mm; the mixing lumen 71 has a lumen diameter of 2500mm to 3000mm.

The oxygen-enriched air purifier also comprises an air flow distributor 5 and an oxygen conveying pipe 3, wherein the air flow distributor 5 is arranged in the mixing pipe cavity 71 and is coaxial with the mixing pipe cavity 71; an oxygen inlet end pipeline 10 of the oxygen conveying pipe 3 is arranged right above the mixer shell 7 outside the mixer shell 7 and is axially parallel to the mixer shell 7, an oxygen outlet end pipeline 31 of the oxygen conveying pipe 3 is communicated into the mixing pipe cavity 71 through a connecting pipeline and is coaxially arranged with the airflow uniform distributor 5, the airflow uniform distributor 5 is a hemispherical airflow guide cover, a hemispherical cambered surface of the airflow uniform distributor 5 is correspondingly arranged at an opening of the oxygen outlet end pipeline 31, and the airflow uniform distributor 5 is used for uniformly guiding oxygen discharged from the oxygen outlet end pipeline 31 into the mixing pipe cavity 71;

first guide plates 4 are uniformly arranged on the outer wall of the oxygen outlet end pipeline 31 in the circumferential direction, second guide plates 6 are uniformly arranged on the gas flow uniform distributor 5 in the circumferential direction, the first guide plates 4 axially extend and are arranged between the outer wall of the oxygen outlet end pipeline 31 and the inner wall of the mixing tube cavity 71, one end of each second guide plate 6 is fixedly connected to the hemispherical surface of the gas flow uniform distributor 5, namely the second guide plates 6 axially extend and are arranged on the outer wall of the hemispherical surface of the gas flow uniform distributor 5 and between the inner wall of the mixing tube cavity 71; the first guide plate 4 is used for uniformly distributing air axially entering the mixing tube cavity 71 in the mixing tube cavity 71 after passing through the first guide plate 4 and mixing the air with oxygen discharged from the oxygen outlet end pipeline 31, the mixed air is uniformly guided to the second guide plate 6 through the air flow uniform distributor 5, and the mixed air is uniformly distributed at the rear end of the mixing tube cavity 71 after passing through the second guide plate 6 and is finally discharged from the mixed air outlet pipe 11.

The first guide plate 4 and the second guide plate 6 are arranged in the circumferential direction with an angle difference alpha of 30-60 degrees. As shown in fig. 2, in the figure, 6 first guide plates 4 are arranged on the circumferential surface of the outer wall of the oxygen

outlet end pipeline

31, 6 second guide plates 6 are also uniformly arranged on the circumferential surface of the gas flow distributor 5, and the angle difference α between the first guide plates 4 and the second guide plates 6 is 60 degrees.

The mixer housing 7 is provided with a support 9 for supporting the mixer housing 7.

The air that gets into by air intake pipe 1 flows into mixing tube chamber 71 through first guide plate 4 evenly distributed, and oxygen is inhaled by oxygen delivery pipe 3 after through the sphere of air current uniform distributor 5 with the air intensive mixing through first guide plate 4, and the mist is discharged by mist outlet pipe 11 after evenly flowing into second guide plate 6, then gets into the blast furnace through the blast furnace air-blower and carries out even oxygen boosting.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The oxygen-enriched mixer used in front of the iron and steel smelting blast furnace is characterized by comprising a mixer shell (7), wherein a mixing tube cavity (71) for mixing air and oxygen is arranged in the mixer shell (7), an air inlet tube (1) and a mixed gas outlet tube (11) are coaxially arranged at two ends of the mixer shell (7), and the air inlet tube (1) and the mixed gas outlet tube (11) are communicated with the mixing tube cavity (71);

the device also comprises an airflow uniform distributor (5) and an oxygen conveying pipe (3), wherein the airflow uniform distributor (5) is arranged in the mixing pipe cavity (71) and is coaxial with the mixing pipe cavity (71); an oxygen inlet end pipeline (10) of the oxygen conveying pipe (3) is arranged outside the mixer shell (7), and an oxygen outlet end pipeline (31) of the oxygen conveying pipe (3) is communicated into the mixing pipe cavity (71) through a connecting pipeline and is coaxially arranged with the airflow uniform distributor (5);

evenly arranged a plurality of first guide plates (4) in the outer wall circumference of oxygen outlet end pipeline (31) evenly arranged a plurality of second guide plates (6) in the circumference of air current uniform distributor (5), first guide plate (4) be used for getting into the air in mixing tube chamber (71) with the axial evenly distributed in mixing tube chamber (71) after through first guide plate (4), air current uniform distributor (5) be used for the even water conservancy diversion of the air of first guide plate (4) rear end and the mixed gas of oxygen to second guide plate (6), second guide plate (6) are used for with mixed gas evenly distributed in mixing tube chamber (71) rear end, finally are discharged by mixed gas outlet pipe (11).

2. The front oxygen-enriched mixer for the steel smelting blast furnace of claim 1, wherein the flow distributor (5) is a hemispherical flow guide cover, the hemispherical arc surface of the flow distributor (5) is correspondingly arranged at the opening of the oxygen outlet end pipeline (31), one end of the second guide plate (6) is fixedly connected to the hemispherical surface of the flow distributor (5), and the other end of the second guide plate (6) is fixedly connected to the inner wall of the mixing tube cavity (71).

3. The oxygen-rich mixer used in front of the steel smelting blast furnace of claim 1, wherein the first guide plate (4) extends axially between the outer wall of the oxygen outlet end pipeline (31) and the inner wall of the mixing tube cavity (71), and the second guide plate (6) extends axially between the outer wall of the flow distributor (5) and the inner wall of the mixing tube cavity (71).

4. The oxygen-rich mixer used in front of the steel smelting blast furnace of claim 1, wherein the first guide plate (4) is evenly provided with at least three on the circumferential surface of the outer wall of the oxygen outlet end pipeline (31), the second guide plate (6) is evenly provided with at least three on the circumferential surface of the flow equilizer (5), the angle difference of the first guide plate (4) and the second guide plate (6) on the circumferential surface is alpha, and alpha is 30-60 degrees.

5. The oxygen-rich mixer before the blast furnace for steel smelting according to claim 4, wherein 6 first guide plates (4) are uniformly arranged on the circumferential surface of the outer wall of the oxygen outlet end pipeline (31), 6 second guide plates (6) are uniformly arranged on the circumferential surface of the flow distributor (5), and the angle difference alpha between the first guide plates (4) and the second guide plates (6) is 60 degrees.

6. The pre-oxygen-rich mixer for the steel smelting blast furnace as claimed in claim 1, wherein one end of the mixer housing (7) is connected to the air inlet pipe (1) through a first taper pipe (21), the other end of the mixer housing (7) is connected to the mixed gas outlet pipe (11) through a second taper pipe (22), the diameter of the pipe cavity of the first taper pipe (21) from the air inlet pipe (1) to the mixer housing (7) is gradually enlarged, and the diameter of the pipe cavity of the second taper pipe (22) from the mixer housing (7) to the mixed gas outlet pipe (11) is gradually reduced.

7. The pre-oxygen-rich mixer for the steel smelting blast furnace as recited in claim 2, wherein the air inlet pipe (1), the first taper pipe (21), the mixer shell (7), the second taper pipe (22) and the mixed gas outlet pipe (11) are coaxially and integrally arranged in sequence.

8. The oxygen-rich mixer for the front of the steel smelting blast furnace as claimed in claim 1, wherein the mixer housing (7) is provided with a support (9) for supporting the mixer housing (7).

9. The oxygen-rich mixer before the blast furnace for steel smelting according to claim 1, wherein the diameter of the air inlet pipe (1) and the mixed gas outlet pipe (11) is 2000mm-2500mm; the diameter of the mixing tube cavity (71) is 2500mm-3000mm.

10. The pre-oxygen-rich mixer for the iron and steel smelting blast furnace of any of claims 1 to 9, wherein the oxygen inlet end pipeline (10) is arranged right above the mixer housing (7) and is arranged in parallel in the axial direction.