阅读说明：本技术 一种高炉用热风系统 (Hot air system for blast furnace ) 是由 裴宗保 刘会圈 刘志勇 戚兆刚 冯继东 张剑华 于 2019-12-02 设计创作，主要内容包括：本发明公开了一种高炉用热风系统,包括多个热风炉、一个控制室、一个烟囱和连接用热风管道,多个热风炉集中布置,多座高炉对称排布在多个热风炉的两侧,每座高炉通过一组热风管道与两个热风炉连通,热风炉通过换热器连接有助燃风机,烟囱安装在换热器上；所述控制室与所述热风炉、换热器、助燃风机、高炉上的驱动装置电连接。本发明构思巧妙,布局紧凑,热风炉集中布置,可以共用一套辅助设备,占地面积小,操作人员少,节省人力物力。(The invention discloses a hot air system for a blast furnace, which comprises a plurality of hot air furnaces, a control chamber, a chimney and hot air pipelines for connection, wherein the hot air furnaces are arranged in a centralized manner; the control room is electrically connected with the hot blast stove, the heat exchanger, the combustion fan and the driving device on the blast furnace. The invention has the advantages of ingenious conception, compact layout, centralized arrangement of the hot blast stoves, capability of sharing one set of auxiliary equipment, small floor area, less operators and manpower and material resource saving.)

1. A hot air system for a blast furnace is characterized in that: the hot blast stove comprises a plurality of hot blast stoves (1), a control chamber (3), a chimney (4) and hot blast pipelines for connection, wherein the hot blast stoves (1) are arranged in a centralized manner, a plurality of blast stoves (6) are symmetrically arranged on two sides of the hot blast stoves (1), each blast stove (6) is communicated with the two hot blast stoves (1) through a group of hot blast pipelines, the hot blast stoves (1) are connected with a combustion-supporting fan (5) through a heat exchanger (2), and the chimney (4) is arranged behind the heat exchanger (2); the control room (3) is electrically connected with the hot blast stove (1), the heat exchanger (2), the combustion fan (5) and a driving device on the blast furnace (6).

2. The hot blast system for a blast furnace according to claim 1, wherein: the blast furnace (6) is provided with two blast furnaces, including a first blast furnace (6-1) and a second blast furnace (6-2), the number of the hot blast furnaces (1) is four, the hot blast furnaces comprise a first hot blast furnace (1-1), a second hot blast furnace (1-2), a third hot blast furnace (1-3) and a fourth hot blast furnace (1-4), the first hot blast furnace (1-1) and the second hot blast furnace (1-2) are arranged side by side and communicated with the first blast furnace (6-1) through a first hot air pipe (7-1), and the third hot blast furnace (1-3) and the fourth hot blast furnace (1-4) are arranged side by side and communicated with the second blast furnace (6-2) through a second hot air pipe (7-2).

3. The hot blast system for a blast furnace according to claim 2, wherein: the heat exchanger (2) comprises a combustion-supporting air heat exchanger (2-1) and a gas heat exchanger (2-2), the combustion-supporting air heat exchanger (2-1) and the gas heat exchanger (2-2) are arranged side by side, one end of the combustion-supporting air heat exchanger (2-1) is communicated with the combustion-supporting fan (5), and the other end of the combustion-supporting air heat exchanger (2-1) is communicated with the first hot blast stove (1-1) and the second hot blast stove (1-2) through pipelines; one end of the gas heat exchanger (2-2) is communicated with the chimney (4), and the other end is communicated with the third hot blast stove (1-3) and the fourth hot blast stove (1-4) through pipelines.

4. The hot blast system for a blast furnace according to claim 1, wherein: the combustion-supporting fan (5) supplies natural air into the combustion-supporting air heat exchanger (2-1) for preliminary heating, the natural air enters the first hot blast stove (1-1) and the second hot blast stove (1-2) through pipelines, and the reheated high-temperature hot air is introduced into the first blast stove (6-1) through the first hot air pipeline (7-1);

the combustion-supporting fan (5) supplies natural air to the gas heat exchanger (2-2) for primary heating, the natural air enters the third hot blast stove (1-3) and the fourth hot blast stove (1-4) through pipelines, and the reheated high-temperature hot air is introduced into the second blast stove (6-2) through the second hot air pipeline (7-2).

5. The hot blast system for a blast furnace according to claim 4, wherein: the parallel parts of the first hot air pipeline (7-1) and the second hot air pipeline (7-2) are communicated through a vertical pipeline, a pipeline partition valve (8) is arranged on the pipeline, and a pipeline partition valve (8) is arranged in each of the first hot air pipeline (7-1) and the second hot air pipeline (7-2);

and hot air outlet pipelines of the first hot air furnace (1-1), the second hot air furnace (1-2), the third hot air furnace (1-3) and the fourth hot air furnace (1-4) are provided with hot air outlet valves (9).

Technical Field

The invention relates to the technical field of smelting equipment, in particular to a hot air system for a blast furnace.

Background

With the progress of smelting technology and the large-scale development of blast furnaces, the occupied area and the investment of the blast furnaces are larger and larger. Usually, each blast furnace is matched with 3-4 hot blast stoves, and 2-burning 1-feeding process is adopted, wherein the overall investment and occupied area of the hot blast stoves are large in proportion.

Disclosure of Invention

The invention aims to provide a hot air system for a blast furnace, which solves the problems of large occupied area and larger investment of the blast furnace in the layout mode of the prior art.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention relates to a hot air system for a blast furnace, which comprises a plurality of hot air furnaces, a control chamber, a chimney and hot air pipelines for connection, wherein the hot air furnaces are arranged in a centralized manner; the control room is electrically connected with the hot blast stove, the heat exchanger, the combustion fan and the driving device on the blast furnace.

Preferably, the blast furnace is provided with two, including a blast furnace and No. two blast furnaces, the hot-blast furnace is provided with four, including first hot-blast furnace, second hot-blast furnace, third hot-blast furnace and fourth hot-blast furnace, first hot-blast furnace, second hot-blast furnace set up side by side through first hot-blast main with a blast furnace intercommunication, third hot-blast furnace, fourth hot-blast furnace set up side by side through second hot-blast main with No. two blast furnaces intercommunication.

Preferably, the heat exchanger comprises a combustion-supporting air heat exchanger and a gas heat exchanger, the combustion-supporting air heat exchanger and the gas heat exchanger are arranged side by side, one end of the combustion-supporting air heat exchanger is communicated with the combustion-supporting fan, and the other end of the combustion-supporting air heat exchanger is communicated with the first hot blast stove and the second hot blast stove through pipelines; one end of the gas heat exchanger is communicated with the chimney, and the other end of the gas heat exchanger is communicated with the third hot blast stove and the fourth hot blast stove through pipelines.

Preferably, the combustion-supporting fan supplies natural air into the combustion-supporting air heat exchanger for preliminary heating, the natural air enters the first hot blast stove and the second hot blast stove through pipelines, and the reheated high-temperature hot air is introduced into the first blast furnace through the first hot air pipeline; the combustion-supporting fan supplies natural wind into the gas heat exchanger for primary heating, the natural wind enters the third hot blast stove and the fourth hot blast stove through pipelines, and the reheated high-temperature hot gas is introduced into the second blast stove through the second hot blast pipeline.

Preferably, the parallel parts of the first hot air pipeline and the second hot air pipeline are communicated through a vertical pipeline, a pipeline partition valve is arranged on the pipeline, and a pipeline partition valve is arranged in each of the first hot air pipeline and the second hot air pipeline; and hot air outlet valves are arranged on the hot air outlet pipelines of the first hot air furnace, the second hot air furnace, the third hot air furnace and the fourth hot air furnace.

Compared with the prior art, the invention has the beneficial technical effects that:

the invention relates to a hot air system for a blast furnace, which comprises a plurality of hot air furnaces, a plurality of blast furnaces, a control chamber, a chimney and a hot air pipeline for connection, wherein the plurality of hot air furnaces are arranged in a centralized manner; firstly, the volume of the single hot blast stove is increased, so that the heat storage capacity is enhanced, and the number of the hot blast stoves is reduced; secondly, sharing the auxiliary facilities, the monomer equipment capacity is strengthened, has reduced standby equipment, for example: the hydraulic station, the electric room, the chimney and the like are compact in layout, so that the occupied area is reduced, and the engineering quantity of lines and pipelines is correspondingly reduced; moreover, the operation of the hot air system is centralized due to large-scale equipment and convenient to operate, and the two systems can be responsible for one class of operators, so that the labor is saved.

Drawings

The invention is further illustrated in the following description with reference to the drawings.

FIG. 1 is a schematic structural view of a hot air system for a blast furnace according to the present invention;

FIG. 2 is a schematic view of the connection of four stoves according to the present invention;

description of reference numerals: 1. a hot blast stove; 1-1, a first hot blast stove; 1-2, a second hot blast stove; 1-3, a third hot blast stove; 1-4, a fourth hot blast stove;

2. a heat exchanger; 2-1, a combustion-supporting air heat exchanger; 2-2, a gas heat exchanger;

3. a control room; 4. a chimney; 5. a combustion fan; 6. a blast furnace; 6-1, a first blast furnace; 6-2, a second blast furnace; 7-1, a first hot air pipeline; 7-2, a second hot air pipeline;

8. a pipeline block valve; 9. a hot air outlet valve.

Detailed Description

As shown in fig. 1, a hot air system for a blast furnace comprises a plurality of hot air furnaces 1, a control chamber 3, a chimney 4 and hot air pipelines for connection, wherein the hot air furnaces 1 are arranged in a centralized manner, a plurality of blast furnaces 6 are symmetrically arranged on two sides of the hot air furnaces 1, each blast furnace 6 is communicated with two hot air furnaces 1 through a group of hot air pipelines, the hot air furnaces 1 are connected with combustion-supporting fans 5 through heat exchangers 2, and the chimney 4 is arranged behind the heat exchangers 2; the control chamber 3 is electrically connected with the hot blast stove 1, the heat exchanger 2, the combustion fan 5 and a driving device on the blast furnace 6. Specifically, a hydraulic station and a PLC control center are arranged in the control room 3 to realize indoor automatic control of the whole equipment. In addition, other control or transmission parts arranged on the blast furnace 6 are electrically connected with a PLC control center in the control room 3, wherein various valves on the hot blast stove are electrically connected with the PLC control center. The use of the PLC control center in the blast furnace application process has become a common technology in the industry, and will not be described herein.

The blast furnace 6 is provided with two blast furnaces, including a first blast furnace 6-1 and a second blast furnace 6-2, the number of the hot blast furnaces 1 is four, including a first hot blast furnace 1-1, a second hot blast furnace 1-2, a third hot blast furnace 1-3 and a fourth hot blast furnace 1-4, the first hot blast furnace 1-1 and the second hot blast furnace 1-2 are arranged side by side and communicated with the first blast furnace 6-1 through a first hot air pipe 7-1, and the third hot blast furnace 1-3 and the fourth hot blast furnace 1-4 are arranged side by side and communicated with the second blast furnace 6-2 through a second hot air pipe 7-2.

The heat exchanger 2 comprises a combustion-supporting air heat exchanger 2-1 and a gas heat exchanger 2-2, the combustion-supporting air heat exchanger 2-1 and the gas heat exchanger 2-2 are arranged side by side, one end of the combustion-supporting air heat exchanger 2-1 is communicated with the combustion-supporting fan 5, and the other end of the combustion-supporting air heat exchanger is communicated with the first hot blast stove 1-1 and the second hot blast stove 1-2 through pipelines; one end of the gas heat exchanger 2-2 is communicated with the chimney 4, and the other end is communicated with the third hot blast stove 1-3 and the fourth hot blast stove 1-4 through pipelines. Specifically, the combustion-supporting air heat exchanger 2-1 and the gas heat exchanger 2-2 are arranged in parallel and operate independently and are respectively applied to the supply of high-temperature hot air of two groups of hot blast stoves which are arranged in parallel.

As shown in fig. 2, the parallel portions of the first hot air duct 7-1 and the second hot air duct 7-2 are communicated through a vertical duct, the duct is provided with a duct partition valve 8, and the interiors of the first hot air duct 7-1 and the second hot air duct 7-2 are both provided with a duct partition valve 8; and hot air outlet pipelines of the first hot air furnace 1-1, the second hot air furnace 1-2, the third hot air furnace 1-3 and the fourth hot air furnace 1-4 are provided with a hot air outlet valve 9. Wherein, the pipeline cut-off valve 8 and the hot air outlet valve 9 are both controlled by hydraulic pressure and communicated with a hydraulic pressure station in the control room 3.

The working process of the invention is as follows:

firstly, the combustion-supporting fan 5 supplies natural wind into the combustion-supporting wind heat exchanger 2-1 for primary heating, the natural wind enters the first hot blast stove 1-1 and the second hot blast stove 1-2 through pipelines, and the reheated high-temperature hot gas is introduced into the first blast furnace 6-1 through the first hot air pipeline 7-1;

the combustion-supporting fan 5 supplies natural wind into the gas heat exchanger 2-2 for primary heating, the natural wind enters the third hot blast stove 1-3 and the fourth hot blast stove 1-4 through pipelines, and the reheated high-temperature hot gas is introduced into the second blast furnace 6-2 through the second hot air pipeline 7-2.

In order to further improve the supply capacity of a single hot blast stove, the heat storage capacity is enhanced by increasing the volume of the single hot blast stove, so that the number of the hot blast stoves is reduced, the centralized arrangement and unified control are convenient to realize. At 1000m³Grades and the following blast furnace uses are examples, for example: aSeat 1000m³The total heat storage area of the blast furnace requiring three hot blast stoves reaches 120000m^2；Two hot blast stoves are changed, the total heat storage area is kept unchanged, and the heat storage area of the single hot blast stove is changed from the original 40000m²Increased to 60000m²And (4) finishing.

In the whole working process, the hot blast stove is mainly used for heating cold air through heat storage refractory materials to provide hot air for the blast furnace, the two hot blast stoves are communicated with the blast furnace, one hot blast stove is in a burning state, the other hot blast stove is in an air supply state, and therefore one burning and one feeding in the air supply process of the blast furnace are achieved.

As shown in fig. 2, two hot blast stoves are a group and are connected with a blast furnace through a hot blast pipeline; the two hot air pipelines, namely the first hot air pipeline 7-1 and the second hot air pipeline 7-2 are communicated through a vertical pipeline, and a pipeline partition valve 8 is arranged on the vertical pipeline; in special cases, the pipeline partition valve 8 on the vertical pipeline, the pipeline partition valve 8 on the first hot air pipeline 7-1 are opened simultaneously, and the pipeline partition valve 8 on the second hot air pipeline 7-2 is closed, so that four hot blast stoves can simultaneously supply air to the first blast furnace 6-1.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.