Hot blast stove device and blast furnace system

Abstract

The utility model discloses a hot blast stove device and a blast furnace system, and belongs to the technical field of ironmaking equipment. The hot-blast stove device comprises: a hot-blast stove having a flue gas outlet end and a waste gas outlet end; the denitration and desulfurization assembly is provided with a flue gas inlet end communicated with the flue gas outlet end; the waste gas pipeline is provided with a waste gas main path, and a first waste gas branch and a second waste gas branch which are connected with the waste gas main path, and the waste gas main path is communicated with the waste gas outlet end; the first waste gas branch control valve and the second waste gas branch first control valve are respectively mounted on the first waste gas branch and the second waste gas branch; and the fan is mounted on the second waste gas branch and is positioned at the downstream of the second waste gas branch control valve. When the hot-blast stove needs to form negative pressure, the first branch can be cut off through the first branch control valve, the fan works, waste gas is discharged through the second branch, the negative pressure is formed in the hot-blast stove under the action of the fan, and the hot-blast stove can be shut down and overhauled conveniently.

Description

Technical Field

[0001] This application belongs to the technical field of ironmaking equipment, and particularly relates to a hot blast stove device and a blast furnace system. Background Art

[0002] The flue gas generated during the combustion operation of the hot blast stove in the ironmaking blast furnace contains sulfides and nitrogen oxides. Under the strict requirements of environmental protection for the emission content of pollutants in the flue gas of the blast furnace hot blast stove, a denitration and desulfurization system is added to the flue gas system of the blast furnace hot blast stove to treat the sulfides and nitrogen oxides generated during the combustion operation of the hot blast stove.

[0003] After adding the desulfurization and denitration system to the hot blast stove, the original hot blast stove flue gas system changes from a negative pressure state to a positive pressure state under the influence of the denitration and desulfurization systems. This causes the inside of the hot blast stove to still form a positive pressure even when the furnace is disconnected, making it difficult to handle the equipment failure of a single hot blast stove online. At the same time, when the hot blast stove is shut down for maintenance to replace valves such as the hot blast valve, if the inside of the hot blast stove cannot form a negative pressure under natural conditions, the return of hot blast in the hot blast stove side pipeline makes it difficult to replace the valve. Utility Model Content

[0004] This application aims to at least solve to some extent the technical problem that the hot blast stove cannot naturally form a negative pressure in the related art. For this purpose, this application provides a hot blast stove device and a blast furnace system.

[0005] In a first aspect, an embodiment of this application provides a hot blast stove device, including:

[0006] A hot blast stove, having a flue gas outlet end and an exhaust gas outlet end;

[0007] A denitration and desulfurization component, having a flue gas inlet end communicated with the flue gas outlet end;

[0008] An exhaust gas pipeline, having an exhaust gas main path and a first exhaust gas branch and a second exhaust gas branch connected to the exhaust gas main path, the exhaust gas main path being communicated with the exhaust gas outlet end;

[0009] A first exhaust gas branch control valve and a first control valve for the second exhaust gas branch, the first exhaust gas branch control valve and the first control valve for the second exhaust gas branch being respectively installed on the first exhaust gas branch and the second exhaust gas branch;

[0010] A fan, installed on the second exhaust gas branch and located downstream of the first control valve for the second exhaust gas branch.

[0011] In some embodiments, the second exhaust gas branch is communicated with the flue gas inlet end.

[0012] In some embodiments, the hot blast stove device further includes a second control valve for the second exhaust gas branch installed on the second exhaust gas branch and located downstream of the fan.

[0013] In some embodiments, the hot blast stove device further includes an exhaust pipeline and an exhaust control valve. The exhaust pipeline is connected to the second exhaust gas branch and is located downstream of the fan, and the exhaust control valve is installed on the exhaust pipeline.

[0014] In some embodiments, the hot blast stove device further includes an adjustment pipeline and an adjustment pipeline control valve installed on the adjustment pipeline. The adjustment pipeline is connected to the second exhaust gas branch and is located between the fan and the first control valve of the second exhaust gas branch.

[0015] In some embodiments, a main road control valve is installed on the main exhaust gas road.

[0016] In some embodiments, the hot blast stove device further includes:

[0017] A chimney;

[0018] A flue gas pipeline having a main flue gas road and a first flue gas branch and a second flue gas branch connected to the main flue gas road. The main flue gas road communicates with the flue gas outlet end, the first flue gas branch communicates with the flue gas inlet end, and the second flue gas branch communicates with the chimney; the denitration and desulfurization assembly further has a purified gas outlet end, and the purified gas outlet end communicates with the second flue gas branch;

[0019] A first flue gas branch control valve installed on the first flue gas branch and located upstream of the denitration and desulfurization assembly;

[0020] A second flue gas branch control valve installed on the second flue gas branch and located upstream of the denitration and desulfurization assembly.

[0021] In some embodiments, a purified gas outlet end control valve is further installed at the purified gas outlet end.

[0022] In some embodiments, the denitration and desulfurization assembly includes a denitration system and a desulfurization system connected in sequence. The flue gas inlet end is arranged in the denitration system, and the purified gas outlet end is arranged in the desulfurization system.

[0023] In a second aspect, an embodiment of the present application further provides a blast furnace system, including the hot blast stove device provided in the first aspect above.

[0024] The utility model has at least the following beneficial effects:

[0025] In the hot blast stove device of the present application, through the setting of the exhaust gas pipeline and the fan, under the normal operation of the hot blast stove, the second exhaust gas branch can be cut off by the first control valve of the second exhaust gas branch, and the first exhaust gas branch can be opened by the control valve of the first exhaust gas branch, so that the exhaust gas generated by the hot blast stove can be discharged through the first exhaust gas branch, thus avoiding the influence of the fan on the normal operation of the hot blast stove; when a negative pressure needs to be formed in the hot blast stove, the first exhaust gas branch can be cut off by the control valve of the first exhaust gas branch, and the fan can be operated to discharge the exhaust gas through the second exhaust gas branch, and a negative pressure is formed in the hot blast stove under the action of the fan, creating a negative pressure condition for the maintenance and replacement of the hot blast stove valves and the baking of the stove, etc., facilitating the shutdown maintenance and other operations of the hot blast stove. Brief Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 Shows the structural schematic diagram of the blast furnace system in one or more embodiments of the present application.

[0028] Reference Numerals: 100 - Hot blast stove device, 110 - Hot blast stove, 111 - Flue gas outlet end, 112 - Exhaust gas outlet end, 120 - Denitrification and desulfurization assembly, 121 - Flue gas inlet end, 122 - Purified gas outlet end, 123 - Control valve for purified gas outlet end, 124 - Denitrification system, 125 - Desulfurization system, 130 - Exhaust gas pipeline, 131 - Main exhaust gas path, 132 - First exhaust gas branch, 133 - Second exhaust gas branch, 134 - Control valve for first exhaust gas branch, 135 - First control valve for second exhaust gas branch, 136 - Second control valve for second exhaust gas branch, 137 - Control valve for main path, 140 - External discharge pipeline, 141 - Control valve for external discharge, 150 - Regulation pipeline, 151 - Control valve for regulation pipeline, 160 - Chimney, 170 - Flue gas pipeline, 171 - Main flue gas path, 172 - First flue gas branch, 173 - Second flue gas branch, 174 - Control valve for first flue gas branch, 175 - Control valve for second flue gas branch, 180 - Fan. Detailed Embodiments

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] It should be noted that all the directional indications in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0033] In the related art, there is a technical problem that the hot blast stove cannot naturally form a negative pressure. The embodiments of the present application provide a hot blast stove device and a blast furnace system, which can at least solve the technical problem that the hot blast stove cannot naturally form a negative pressure to a certain extent.

[0034] The following describes the present application with reference to the accompanying drawings and specific embodiments:

[0035] The embodiments of the present application provide a hot blast stove device 100 and a blast furnace system. The hot blast stove device 100 and the blast furnace system provided by the embodiments of the present application can form a negative pressure in the hot blast stove 110 through the action of a fan, which facilitates the operation of shutting down the hot blast stove 110 for maintenance and other work.

[0036] The hot blast stove device 100 includes:

[0037] A hot blast stove 110 having a flue gas outlet end 111 and an exhaust gas outlet end 112;

[0038] A denitration and desulfurization component 120 having a flue gas inlet end 121 communicated with the flue gas outlet end 111;

[0039] The exhaust gas pipeline 130 has a main exhaust gas path 131, a first exhaust gas branch 132 and a second exhaust gas branch 133 connected to the main exhaust gas path 131. The main exhaust gas path 131 communicates with the exhaust gas outlet end 112.

[0040] A first exhaust gas branch control valve 134 and a first control valve of the second exhaust gas branch 135 are respectively installed on the first exhaust gas branch 132 and the second exhaust gas branch 133.

[0041] A blower 180 is installed on the second exhaust gas branch 133 and is located downstream of the first control valve 135 of the second exhaust gas branch.

[0042] The flue gas outlet end 111 of the hot blast stove 110 is used to discharge the flue gas generated by the combustion of gas and air, and the flue gas usually contains nitrogen oxides, sulfides, particulate matter, etc. The flue gas outlet end 111 communicates with the flue gas inlet end 121, so that the flue gas generated by the hot blast stove 110 can enter the denitration and desulfurization assembly 120 for denitration and desulfurization treatment, thereby reducing the air pollution of the flue gas and meeting the environmental protection requirements.

[0043] When the hot blast stove 110 operates normally, the air discharged from the exhaust gas outlet end 112 of the hot blast stove 110 contains less pollutants in the exhaust gas and can be directly discharged into the atmosphere.

[0044] The main path of the exhaust gas pipeline 130 communicates with the exhaust gas outlet end 112, and both the first exhaust gas branch 132 and the second exhaust gas branch 133 communicate with the main exhaust gas path 131. When the hot blast stove 110 is in normal working state, the first control valve 135 of the second exhaust gas branch 133 is closed, and the first exhaust gas branch control valve 134 on the first exhaust gas branch 132 is opened, so that the exhaust gas generated by the hot blast stove 110 is discharged through the first exhaust gas branch 132. The exhaust gas of the first exhaust gas branch 132 can be directly discharged into the air. If the environmental protection requirements are relatively strict, it can also be discharged into the subsequent gas treatment system, such as the denitration and desulfurization assembly 120, and then discharged after treatment. The user can make an adaptive design according to the environmental protection requirements, which is not limited here.

[0045] When the hot blast stove 110 fails or needs to be overhauled, etc., and it is necessary to form a negative pressure in the hot blast stove 110, the first exhaust gas branch control valve 134 on the first exhaust gas branch 132 is closed, the first control valve 135 of the second exhaust gas branch 133 is opened, and at the same time the blower 180 is turned on, so that the exhaust gas generated by the hot blast stove 110 is discharged through the second exhaust gas branch 133. When the blower 180 operates, the gas in the hot blast stove 110 is continuously sucked outwards, so that the gas pressure in the hot blast stove 110 can be less than the external atmospheric pressure, and then a negative pressure can be formed in the hot blast stove 110.

[0046] After the hot blast stove device 100 of the present application is designed in this way, the hot blast stove 110 can form a negative pressure inside the hot blast stove 110 under the coordinated action of the fan 180, the first exhaust gas branch 132, the second exhaust gas branch 133, the first exhaust gas branch control valve 134 and the first control valve 135 of the second exhaust gas branch, creating negative pressure conditions for valve maintenance and replacement, baking and other operations of the hot blast stove 110, facilitating the shutdown maintenance work of the hot blast stove 110, and helping to improve the production efficiency of the enterprise. In addition, the hot blast stove device 100 of the present application has a simple structure, and the operation process of forming a negative pressure in the hot blast stove 110 is also relatively simple. Under the normal working condition of the hot blast stove 110, the second exhaust gas branch 133 can be cut off by the first control valve 135 of the second exhaust gas branch, so that the exhaust gas generated by the hot blast stove 110 can be discharged through the first exhaust gas branch 132 of the exhaust gas pipeline 130, ensuring that the second exhaust gas branch 133 and the fan 180 will not have an adverse impact on the normal operation of the hot blast stove 110 and guaranteeing the normal operation of the hot blast stove 110.

[0047] In some embodiments, the second exhaust gas branch 133 is connected to the flue gas inlet end 121.

[0048] It is easy to understand that one end of the second exhaust gas branch 133 is connected to the main exhaust gas path 131, and the other end is connected to the flue gas inlet end 121. When the fan 180 operates, the air volume discharged from the exhaust gas outlet end 112 will increase. A small amount of flue gas in the hot blast stove 110 will be discharged from the exhaust gas outlet end 112 under the action of the fan 180. After such a design, during the process of forming a negative pressure in the hot blast stove 110, the gas discharged through the exhaust gas outlet end 112 can enter the denitration and desulfurization assembly 120 for purification treatment, which helps to reduce the pollution of nitrogen oxides, sulfides, particulate matter, etc. to the atmosphere to a certain extent and improves the environmental protection performance of the hot blast stove device 100.

[0049] In some embodiments, the hot blast stove device 100 further includes a second control valve 136 of the second exhaust gas branch, which is installed on the second exhaust gas branch 133 and downstream of the fan 180.

[0050] The second control valve 136 of the second exhaust gas branch is installed downstream of the fan 180, which can prevent the flue gas discharged from the flue gas outlet end 111 from entering the second exhaust gas branch 133, ensuring that the flue gas discharged from the flue gas outlet end 111 smoothly enters the denitration and desulfurization assembly 120 through the flue gas inlet end 121.

[0051] In some embodiments, the hot blast stove device 100 further includes an external discharge pipeline 140 and an external discharge control valve 141. The external discharge pipeline 140 is connected to the second exhaust gas branch 133 and is located downstream of the fan 180. The external discharge control valve 141 is installed on the external discharge pipeline 140.

[0052] When the fan 180 is operating and the gas discharged from the second exhaust gas branch 133 meets the requirements for external discharge, the external discharge control valve 141 can be opened and the second control valve 136 of the second exhaust gas branch can be closed, so that the exhaust gas in the second exhaust gas branch 133 is directly discharged into the atmosphere through the external discharge pipeline 140 without passing through the denitration and desulfurization component 120.

[0053] When the fan 180 is operating, the negative pressure in the hot blast stove 110 can be adjusted by adjusting the operating power of the fan 180. To a certain extent, the greater the operating power of the fan 180, the lower the air pressure value in the hot blast stove 110.

[0054] In some embodiments, the hot blast stove device 100 further includes an adjustment pipeline 150 and an adjustment pipeline control valve 151 installed on the adjustment pipeline 150. The adjustment pipeline 150 is connected to the second exhaust gas branch 133 and is located between the fan 180 and the first control valve 135 of the second exhaust gas branch.

[0055] When the adjustment pipeline 150 is not provided, the fan 180 sucks air through the hot blast stove 110 during operation. After the adjustment pipeline 150 is provided, the fan 180 can also suck air from the atmosphere through the adjustment pipeline 150 during operation. In this way, by adjusting the opening degree of the adjustment pipeline control valve 151, the air intake volume of the fan 180 from the hot blast stove 110 can be adjusted, and thus the air pressure in the hot blast stove 110 can be adjusted.

[0056] In some embodiments, a main pipeline control valve 137 is installed on the main exhaust gas pipeline 131.

[0057] The setting of the main pipeline control valve 137 helps to improve the safety performance of the hot blast stove device 100. When the first control valve 134 of the first exhaust gas branch and the first control valve 135 of the second exhaust gas branch are damaged, the opening and closing of the entire exhaust gas outlet end 112 can be controlled by controlling the opening and closing of the main pipeline control valve 137, so as to facilitate the maintenance of the first control valve 134 of the first exhaust gas branch, the first control valve 135 of the second exhaust gas branch, the first exhaust gas branch 132, the second exhaust gas branch 133, etc.

[0058] In some embodiments, the hot blast stove device 100 further includes: a chimney 160; a flue gas pipeline 170 having a main flue gas path 171, a first flue gas branch 172 and a second flue gas branch 173 connected to the main flue gas path 171, the main flue gas path 171 being communicated with a flue gas outlet end 111, the second flue gas branch 173 (172) being communicated with a flue gas inlet end 121, and the second flue gas branch being communicated with the chimney 160; the denitration and desulfurization assembly 120 further having a purified gas outlet end 122, the purified gas outlet end 122 being communicated with the second flue gas branch 173; a first flue gas branch control valve 173 installed in the first flue gas branch 172 and located upstream of the denitration and desulfurization assembly 120; and a second flue gas branch control valve 175 installed in the second flue gas branch 173 and located upstream of the denitration and desulfurization assembly 120.

[0059] One end of the main flue gas path 171 is communicated with the flue gas outlet end 111, and the other end is used for communicating with one end of the first flue gas branch 172 and one end of the second flue gas branch 173. The other end of the first flue gas branch 172 is used for communicating with the flue gas inlet end 121, and the other end of the second flue gas branch 173 is used for communicating with the chimney 160. After such a design, the flue gas discharged from the flue gas outlet end 111 can enter the denitration and desulfurization assembly 120 through the first flue gas branch 172 for purification and finally be discharged into the chimney 160 through the purified gas outlet end 122. The flue gas discharged from the flue gas outlet end 111 can also be directly discharged into the chimney 160 without being processed by the denitration and desulfurization assembly 120.

[0060] When the flue gas needs to be purified, the second flue gas branch control valve 175 is closed and the first flue gas branch control valve 173 is opened, and the flue gas can enter the denitration and desulfurization assembly 120 for purification. When an emergency occurs and the flue gas needs to be directly discharged, the second flue gas branch control valve 175 is opened and the first flue gas branch control valve 173 is closed, and the flue gas can directly enter the chimney 160 and be discharged through the chimney 160.

[0061] In some embodiments, a purified gas outlet end control valve 123 is further installed at the purified gas outlet end 122.

[0062] When the flue gas is directly discharged, the purified gas outlet end control valve 123 can also be closed to prevent the flue gas in the second flue gas branch 173 from flowing back into the denitration and desulfurization assembly 120 and affecting the normal operation of the denitration and desulfurization assembly 120.

[0063] In some embodiments, the denitration and desulfurization assembly includes a denitration system 124 and a desulfurization system 125 connected in sequence, the flue gas inlet end 121 is arranged in the denitration system 124, and the purified gas outlet end 122 is arranged in the desulfurization system 125.

[0064] The flue gas inlet end 121 is arranged on the denitration system 124. The flue gas first enters the denitration system 124 for denitration treatment, then enters the desulfurization system 125 for desulfurization treatment, and finally is discharged into the chimney 160 from the purifier outlet end on the desulfurization system 125.

[0065] The structures of the desulfurization system 125 and the denitration system 124 are diverse and are well-known to those skilled in the art, and are not limited in this application.

[0066] Based on the same inventive concept, the embodiment of the present application also provides a blast furnace system, including the hot blast stove device 100 described above in the present application.

[0067] In some embodiments, the blast furnace system further includes a blast furnace, an air pipeline, a gas pipeline, and a cold air pipeline. The air pipeline is connected to the hot blast stove 110 to supply air to the hot blast stove 110; the gas pipeline is connected to the hot blast stove 110 to supply gas to the hot blast stove 110; the cold air pipeline is connected to the hot blast stove 110 to supply cold air to the hot blast stove 110; the blast furnace is connected to the hot blast stove 110. The gas and air burn and react in the hot blast stove 110 to generate hot air, and the blast furnace is connected to the hot blast stove 110 to transport the hot air produced in the hot blast stove 110 into the blast furnace.

[0068] In some embodiments, the blast furnace system is provided with a plurality of hot blast stoves 110, and the plurality of hot blast stoves 110 operate simultaneously to improve production efficiency.

[0069] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0070] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of the technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0071] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A hot air stove device, characterized in that: include: A hot blast furnace (110) having a smoke outlet (111) and a waste gas outlet (112); A denitration and desulfurization component (120) having a flue gas inlet end (121) connected to the flue gas outlet end (111); An exhaust gas pipeline (130) comprises an exhaust gas main path (131) and a first exhaust gas branch path (132) and a second exhaust gas branch path (133) connected to the exhaust gas main path (131), wherein the exhaust gas main path (131) is in communication with the exhaust gas outlet end (112); a first exhaust branch control valve (134) and a second exhaust branch first control valve (135), wherein the first exhaust branch control valve (134) and the second exhaust branch first control valve (135) are installed on the first exhaust branch (132) and the second exhaust branch (133), respectively; The fan (180) is installed in the second exhaust gas branch (133) and is located downstream of the first control valve (135) of the second exhaust gas branch.

2. The hot blast stove device according to claim 1, characterized in that: The second exhaust gas branch (133) is connected to the flue gas inlet end (121).

3. The hot blast stove device according to claim 1, characterized in that: The hot blast stove device (100) further comprises a second exhaust gas branch second control valve (136) installed on the second exhaust gas branch (133) and located downstream of the fan (180).

4. The hot blast stove device according to claim 3, characterized in that: The hot air stove device (100) further comprises an external exhaust pipeline (140) and an external exhaust control valve (141); the external exhaust pipeline (140) is connected to the second exhaust gas branch (133) and is located downstream of the fan (180); and the external exhaust control valve (141) is installed on the external exhaust pipeline (140).

5. The hot blast stove device according to any one of claims 1 to 4, characterized in that: The hot blast stove device (100) further comprises a regulating pipeline (150) and a regulating pipeline control valve (151) installed on the regulating pipeline (150); the regulating pipeline (150) is connected to the second exhaust gas branch (133) and is located between the fan (180) and the first control valve (135) of the second exhaust gas branch.

6. The hot blast stove device according to any one of claims 1 to 4, characterized in that: A main path control valve (137) is installed on the exhaust gas main path (131).

7. The hot blast stove device according to any one of claims 1 to 4, characterized in that: The hot blast stove device (100) further comprises: Chimney (160); The flue gas pipeline (170) comprises a main flue gas pipeline (171) and a first flue gas branch pipeline (172) and a second flue gas branch pipeline (173) connected to the main flue gas pipeline (171), wherein the main flue gas pipeline (171) is connected to the flue gas outlet (111), the first flue gas branch pipeline (172) is connected to the flue gas inlet (121), and the second flue gas branch pipeline (173) is connected to the chimney (160); the denitration and desulfurization component (120) further comprises a purified gas outlet (122), and the purified gas outlet (122) is connected to the second flue gas branch pipeline (173); A first flue gas branch control valve (174) installed on the first flue gas branch (172) and located upstream of the denitration and desulfurization component (120); The second flue gas branch control valve (175) is installed on the second flue gas branch (173) and is located upstream of the denitration and desulfurization component (120).

8. The hot blast stove device according to claim 7, characterized in that: The purified gas outlet end (122) is also provided with a purified gas outlet end control valve (123).

9. The hot blast stove device according to claim 8, characterized in that: The denitration and desulfurization component (120) comprises a denitration system (124) and a desulfurization system (125) which are connected in sequence, the flue gas inlet end (121) is arranged in the denitration system (124), and the purified gas outlet end (122) is arranged in the desulfurization system (125).

10. A blast furnace system, characterized in that: The invention comprises a hot blast stove device (100) according to any one of claims 1 to 9.

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