CN218710618U - Hot-blast furnace throat structure and top combustion formula hot-blast furnace - Google Patents
Hot-blast furnace throat structure and top combustion formula hot-blast furnace Download PDFInfo
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- CN218710618U CN218710618U CN202222714350.7U CN202222714350U CN218710618U CN 218710618 U CN218710618 U CN 218710618U CN 202222714350 U CN202222714350 U CN 202222714350U CN 218710618 U CN218710618 U CN 218710618U
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- guide cylinder
- cylinder body
- flow guide
- throat structure
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Abstract
The utility model provides a hot-blast furnace throat structure and top combustion formula hot-blast furnace, include: one end of the flow guide cylinder body is provided with a flow inlet, and the other end of the flow guide cylinder body is provided with a flow outlet; the inner wall of the flow guide cylinder body is provided with a plurality of bulges which are uniformly distributed on the inner wall of the flow guide cylinder body. Because the combustor is efflux for the whirl gas in this scheme, set up a plurality of archs in the draft tube for the whirl motion of whirl gas self forms "stirring" effect with the protruding structural cooperation in the draft tube, realizes air and coal gas homogeneous mixing, in order to improve the combustion efficiency of coal gas in the combustion chamber.
Description
Technical Field
The utility model belongs to the field of metallurgy, especially relate to a hot-blast furnace throat structure and top combustion formula hot-blast furnace.
Background
The throat structure of hot blast stove used in blast furnace iron making technology is usually configured with a spiral-flow type ceramic burner, after being sprayed out from the spiral-flow nozzle of the ceramic burner, air and coal gas are premixed in the spiral-flow movement, and then enter the cone-shaped combustion chamber through the cylindrical throat for combustion, so as to heat the checker bricks in the heat storage chamber, thereby achieving the purpose of heat storage. In the combustion process of the throat structure of the hot blast stove, the throat is an indispensable device for connecting the ceramic burner and the combustion chamber.
The spiral-flow type ceramic burners with the throat structures of the hot blast stoves are numerous, the nozzle forms, angles and the number of different ceramic burners are different, the premixing efficiency and the premixing time of air and gas are different, and the premixing effect is high or low. From the practical production experience, most of the spiral-flow type ceramic burners cannot completely and uniformly mix air and coal gas, so that the coal gas cannot be completely combusted after entering a combustion chamber, a part of coal gas resources are wasted, the environmental protection pressure is increased, and certain hidden danger is brought to the production safety of the subsequent process.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, the present invention provides a throat structure of a hot blast stove and a top-burning hot blast stove, so as to improve the mixing effect and the gas combustion rate.
In order to achieve the above objects and other related objects, the present invention provides a throat structure of a hot blast stove, including: one end of the flow guide cylinder body is provided with a flow inlet, and the other end of the flow guide cylinder body is provided with a flow outlet; the inner wall of the flow guide cylinder body is provided with a plurality of bulges which are uniformly distributed on the inner wall of the flow guide cylinder body.
Optionally, the protrusions are uniformly arranged along the circumferential direction of the guide cylinder body to form an annular structure.
Optionally, the protrusion is provided with multiple rings from the inlet to the outlet.
Optionally, the protrusions of two adjacent rings are arranged in a staggered manner, so that each protrusion of two adjacent rings is located on a triangle of the triangle.
Optionally, the inlet is a bell mouth.
Optionally, the flow inlet includes a large end and a small end, and the small end is disposed at an end of the flow inlet close to the flow outlet.
Optionally, the large end of the flow inlet is in arc transition with the end surface of the flow guide cylinder.
In order to achieve the above objects and other related objects, the present invention provides a top combustion stove, which comprises a combustion chamber, a burner and the above throat structure, wherein the burner is connected to the combustion chamber, and the throat structure is disposed at the outlet of the burner.
Optionally, the flow guiding cylinder body in the throat structure of the hot blast stove is cylindrical.
Optionally, the axes of the combustion chamber, burner and stove throat arrangement coincide.
As mentioned above, the utility model discloses a hot-blast furnace throat mouth structure and top combustion formula hot-blast furnace has following beneficial effect:
because the outflow of the combustor is rotational flow gas, and a plurality of bulges are arranged in the guide cylinder body, the rotational flow motion of the rotational flow gas is matched with the bulge structures in the guide cylinder body to form a stirring effect, so that the air and the coal gas are uniformly mixed, and the combustion efficiency of the coal gas in the combustion chamber is improved.
According to the scheme, under the condition that other structures of the top combustion type hot blast stove are not changed, the secondary mixing of coal gas and air is realized by changing the throat structure of the hot blast stove and utilizing the position characteristics of the throat structure.
Drawings
Fig. 1 is an internal structure schematic diagram of a throat structure of a hot blast stove in the embodiment of the utility model.
Fig. 2 isbase:Sub>A schematic cross-sectional view atbase:Sub>A-base:Sub>A in fig. 1.
Fig. 3 is a schematic structural diagram of a top-combustion stove according to an embodiment of the present invention.
Detailed Description
Reference numerals in the drawings of the specification include: the burner comprises a burner 1, a hot blast stove throat structure 2, a guide cylinder body 201, an inlet 202, an outlet 203, a bulge 204 and a combustion chamber 3.
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
The application provides a throat structure of a hot blast stove, and the throat structure refers to figures 1 and 2.
In an exemplary embodiment, the throat structure of the hot blast stove comprises a flow guide cylinder body 201, wherein one end of the flow guide cylinder body 201 is an inlet 202, and the other end of the flow guide cylinder body 201 is an outlet 203; a plurality of protrusions 204 are arranged on the inner wall of the guide cylinder body 201, and the protrusions 204 are uniformly distributed on the inner wall of the guide cylinder body 201.
It is worth to be noted that, as the outflow of the burner 1 is swirl gas, the plurality of protrusions 204 are arranged in the guide cylinder 201, so that the swirl motion of the swirl gas is matched with the protrusions 204 in the guide cylinder 201 to form a stirring effect, thereby realizing uniform mixing of air and coal gas and improving the combustion efficiency of the coal gas in the combustion chamber 3.
In an exemplary embodiment, the protrusions 204 are uniformly arranged along the circumferential direction of the guide cylinder 201 to form a ring structure.
In this embodiment, the protrusions 204 are arranged at intervals in a ring shape, so that the gas can enter the flow guide cylinder 201 from the gaps between the protrusions 204, and the gas and the air can be uniformly mixed.
In an exemplary embodiment, the protrusion 204 is provided with multiple rings in the direction from the inlet 202 to the outlet 203.
In this embodiment, the protrusion 204 is provided with a plurality of rings to increase the mixing efficiency of gas and air.
In an exemplary embodiment, the protrusions 204 of two adjacent rings are arranged in a staggered manner, such that the adjacent protrusions 204 of two adjacent rings are located on the triangle of the triangle.
Illustratively, two adjacent ring protrusions 204 are referred to as a first ring protrusion 204 and a second ring protrusion 204, respectively, and are arranged in a staggered manner, that is, the second ring protrusion 204 is arranged between the gaps of the first ring protrusion 204, so that the first ring protrusion 204 and the second ring protrusion 204 are located on the triangle of the triangle.
For example, the number of the protrusions 204 per ring may be set according to requirements, and the number of the protrusions 204 in each ring may be set to be uniform or non-uniform.
Illustratively, the number of protrusions 204 in each ring increases from the inlet 202 to the outlet 203. The offset angle β between two adjacent ring protrusions 204 can be set according to the number of protrusions 204 per ring.
In an exemplary embodiment, the inlet 202 is a bell mouth.
In this embodiment, a bell mouth is provided to facilitate the inflow.
It should be noted that the inclination angle a of the bell mouth can be set according to the requirement.
In an exemplary embodiment, the inlet 202 includes a large end and a small end, with the small end being disposed at an end of the inlet 202 proximate the outlet 203.
In the present embodiment, the large end is installed toward the direction inside the combustor 1, and the small end is installed toward the direction of the combustion chamber 3, so that the combustor 1 outflow enters the guide cylinder body.
In an exemplary embodiment, the large end of the inlet 202 is in arc transition with the end surface of the flow guide cylinder 201.
In the embodiment, the inflow fluency is improved.
As shown in fig. 3, the present application further provides a top-combustion hot blast stove, which comprises a combustion chamber 3, a burner 1 and the above hot blast stove throat structure 2, wherein the burner 1 is connected with the combustion chamber 3, and the hot blast stove throat structure 2 is arranged at an outlet position of the burner 1.
In this embodiment, the swirling flow gas ejected from the nozzle of the burner 1 enters the throat structure 2 of the hot blast stove to be secondarily mixed, and then enters the combustion chamber 3 from the guide cylinder 201 to be combusted. The swirl gas generated in the combustor 1 can be effectively utilized to help air and coal gas to carry out secondary mixing, so that the two gases are mixed more uniformly and can be combusted more fully after entering the combustion chamber 3. Effectively reduces the residual gas, and is beneficial to energy conservation, environmental protection and safe production of subsequent processes.
In an exemplary embodiment, the flow guiding cylinder 201 in the stove throat structure 2 is cylindrical.
In this embodiment, the cylindrical guide cylinder 201 can increase the smoothness of the airflow compared with the bent cylinder.
In an exemplary embodiment, the axes of the combustion chamber 3, the burner 1 and the stove throat structure 2 coincide.
In this embodiment, the axes of the combustion chamber 3, burner 1 and burner throat structure 2 coincide to increase the gas flow fluency.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. It will be apparent to those skilled in the art that modifications and variations can be made to the above-described embodiments without departing from the spirit or scope of the invention and it is intended that all such equivalent modifications and variations be considered within the scope of the appended claims without departing from the spirit and scope of the invention.
Claims (10)
1. A throat structure of a hot blast stove is characterized by comprising a flow guide cylinder body, wherein one end of the flow guide cylinder body is provided with a flow inlet, and the other end of the flow guide cylinder body is provided with a flow outlet; the inner wall of the flow guide cylinder body is provided with a plurality of bulges which are uniformly distributed on the inner wall of the flow guide cylinder body.
2. The throat structure of a hot blast stove according to claim 1, wherein the protrusions are uniformly arranged along the circumferential direction of the flow guide cylinder body to form an annular structure.
3. The hot blast stove throat structure according to claim 2, wherein the projection is provided with multiple rings in the direction from the inlet to the outlet.
4. The throat structure of a hot blast stove according to claim 3, wherein the projections of two adjacent rings are arranged in a staggered manner, so that the adjacent projections of two adjacent rings are positioned on a triangle of a triangle.
5. The hot blast stove throat structure according to claim 1, wherein the inlet is a flare.
6. The hot blast stove throat construction according to claim 5, wherein the inlet comprises a large end and a small end, the small end being disposed at an end of the inlet adjacent the outlet.
7. The throat structure of a hot blast stove according to claim 6, wherein the large end of the inlet is in arc transition with the end surface of the flow guide cylinder.
8. A top-fired stove comprising a combustion chamber, a burner connected to the combustion chamber, and a throat arrangement according to any one of claims 1 to 7 provided at the outlet of the burner.
9. The top combustion stove according to claim 8, wherein the flow guiding cylinder in the stove throat structure is cylindrical.
10. The top combustion stove according to claim 9, wherein the axes of the combustion chamber, burner and stove throat structure coincide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222714350.7U CN218710618U (en) | 2022-10-14 | 2022-10-14 | Hot-blast furnace throat structure and top combustion formula hot-blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222714350.7U CN218710618U (en) | 2022-10-14 | 2022-10-14 | Hot-blast furnace throat structure and top combustion formula hot-blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218710618U true CN218710618U (en) | 2023-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222714350.7U Active CN218710618U (en) | 2022-10-14 | 2022-10-14 | Hot-blast furnace throat structure and top combustion formula hot-blast furnace |
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| Country | Link |
|---|---|
| CN (1) | CN218710618U (en) |
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2022
- 2022-10-14 CN CN202222714350.7U patent/CN218710618U/en active Active
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