CN217628467U - Hot-blast furnace pressure charging and discharging system - Google Patents

Abstract

The utility model provides a hot-blast furnace fills row's pressure system relates to metallurgical technical field, and hot-blast furnace fills row's pressure system includes: the first hot air structure is used for being connected with a first blast furnace and comprises a first main pipeline, a first hot air furnace and a first charging and discharging pipeline; the second hot air structure is used for being connected with a second blast furnace and comprises a second main pipeline, a second hot air furnace and a second charging and discharging pipeline; and the furnace pressure control structure is arranged between the first waste gas main pipe and the second waste gas main pipe, and the first hot blast furnace can charge and pressurize the second hot blast furnace through the furnace pressure control structure when the second hot blast furnace is in a furnace changing state. The utility model discloses a hot-blast furnace fills row and presses system can solve the hot-blast furnace and trade the stove in-process and cause the problem of disturbance to the income stove amount of wind in the blast furnace.

Description

Hot-blast furnace pressure charging and discharging system

Technical Field

The utility model relates to the technical field of metallurgy, in particular to hot blast stove fills row's pressure system.

Background

In the production process of a blast furnace in the iron-making industry, the mode of cold air pressurization and direct discharge of exhaust gas is generally adopted in the furnace changing operation of the hot blast furnace. In the process of pressurizing the hot blast stove, because of the pressure difference between the hot blast stove and the blast furnace, a part of cold air needs to be input into the hot blast stove in a stewing state, the cold air is pressurized by charging air into the hot blast stove to eliminate the pressure difference, and the air volume entering the hot blast stove cannot be input into the blast furnace through the hot blast stove, so that the air pressure and the air volume of the blast furnace are fluctuated. When the blast furnace air quantity is reduced, the process is equivalent to blast furnace air reduction production, which can cause the blast furnace production reduction. And after the blast furnace enters the blast furnace, the air pressure and the air quantity fluctuate, the problems of fuel ratio rise of the blast furnace, inactivity of a furnace hearth, even accumulation of the furnace hearth and the like can be caused, and the stable operation of the blast furnace is seriously influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above defects of the prior art, the embodiment of the utility model provides a technical problem that will solve provides a hot-blast furnace pressure charging and discharging system for solve the hot-blast furnace and trade the problem that the stove amount of wind caused the disturbance in the in-process to the blast furnace.

The above object of the utility model can be realized by adopting the following technical scheme, the utility model provides a hot-blast furnace fills row and presses system, include:

the first hot air structure comprises a first main pipeline, a first hot air pipeline connected with the first blast furnace, a first hot air furnace arranged on the first hot air pipeline, and a first charging and discharging pipeline arranged between the first hot air furnace and the first main pipeline, wherein the first main pipeline comprises a first cold air main pipe, a first flue gas main pipe and a first waste gas main pipe which are arranged in parallel, the first charging and discharging pipeline comprises a first cold air branch pipe connected with the first hot air furnace and the first cold air main pipe, a first flue gas branch pipe connected with the first hot air furnace and the first flue gas main pipe, and a first waste gas branch pipe connected with the first hot air furnace and the first waste gas main pipe;

the second hot air structure is used for being connected with a second blast furnace and comprises a second main pipeline, a second hot air pipeline connected with the second blast furnace, a second hot air furnace arranged on the second hot air pipeline and a second charging and discharging pipeline arranged between the second hot air furnace and the second main pipeline, and the second main pipeline comprises a second cold air main pipe, a second flue gas main pipe and a second waste gas main pipe which are arranged in parallel; the second charging and discharging pipeline comprises a second cold air branch pipe connected with the second hot air furnace and the second cold air main pipe, a second flue gas branch pipe connected with the second hot air furnace and the second flue gas main pipe, and a second waste gas branch pipe connected with the second hot air furnace and the second waste gas main pipe;

a furnace pressure control structure disposed between the first exhaust gas main and the second exhaust gas main, the furnace pressure control structure controllably communicating the first and second hot blast stoves;

and when the second hot blast stove is in a stove changing state, the first hot blast stove can charge air and pressurize the second hot blast stove through the stove pressure control structure.

The utility model discloses a preferred embodiment, furnace pressure control structure includes the third control pipeline, sets up air supply arrangement, setting on the third control pipeline are in the third control pipeline with third between the first exhaust manifold fills row pipeline and sets up the third control pipeline with fourth between the second exhaust manifold fills row pipeline, the third fills row pipeline controllable intercommunication the third control pipeline with first exhaust manifold, the fourth fills row pipeline controllable intercommunication the third control pipeline with the second exhaust manifold.

The utility model discloses a preferred embodiment, hot-blast furnace fills row's pressure system still is in including setting up gas storage device on the third control pipeline, air supply arrangement can be right gas storage device fills the wind pressurization.

The present invention provides a preferable embodiment, wherein the outlet of the first exhaust gas main pipe is provided with a first exhaust gas outlet control valve, and the outlet of the second exhaust gas main pipe is provided with a second exhaust gas outlet control valve.

The utility model discloses an in a preferred embodiment, be equipped with first hot-blast control valve on the first hot-blast main, first hot-blast control valve sets up first blast furnace with between the first hot-blast furnace, be equipped with first cold wind control valve on the first cold wind branch pipe, be equipped with first flue gas control valve on the first flue gas branch pipe, be equipped with first waste gas control valve on the first waste gas branch pipe.

The utility model discloses an in a preferred embodiment, first hot-blast furnace connects in parallel and is provided with a plurality ofly, every first hot-blast furnace with all correspond between the first blast furnace and be equipped with first hot air control valve, every first hot-blast furnace with all correspond between the first main pipeline and be equipped with first row pipeline fills.

The utility model discloses an in a preferred embodiment, be equipped with the hot-blast control valve of second on the second hot-blast main, the hot-blast control valve of second sets up the second blast furnace with between the second hot-blast furnace, be equipped with second cold wind control valve on the second cold wind branch pipe, be equipped with second flue gas control valve on the second flue gas branch pipe, be equipped with second waste gas control valve on the second waste gas branch pipe.

The utility model discloses an in a preferred embodiment, the second hot-blast furnace is parallelly connected to be provided with a plurality ofly, every the second hot-blast furnace with all correspond between the second blast furnace and be equipped with the hot-blast control valve of second, every the second hot-blast furnace with all correspond between the total pipeline of second and be equipped with the second fills the row pipeline.

The utility model discloses an in a preferred embodiment, the third fills the exhaust pipe way including parallelly connected first exhaust gas collecting pipe and the first gas transmission branch pipe that sets up, be equipped with first waste gas collecting control valve on the first exhaust gas collecting pipe, be equipped with first gas transmission control valve on the first gas transmission branch pipe, first exhaust gas collecting pipe is connected in controllable manner first exhaust gas collecting pipe and the import of third control pipeline, first gas transmission branch pipe is connected in controllable manner first exhaust gas collecting pipe and the export of third control pipeline.

The utility model discloses a in a preferred embodiment, the fourth fills row pipeline is including parallelly connected second exhaust gas collecting pipe and the second gas transmission branch pipe that sets up, be equipped with second waste gas collection control valve on the second exhaust gas collecting pipe, be equipped with the defeated air control valve of second on the second gas transmission branch pipe, second exhaust gas collecting pipe is connected in a controlled manner second exhaust gas house steward and the import of third control pipeline, second gas transmission branch pipe is connected in a controlled manner second exhaust gas house steward and the export of third control pipeline.

In a preferred embodiment of the present invention, the third control pipeline is provided with an air supply device, a first cut-off valve, an air storage device, a first regulating valve and a second cut-off valve in sequence along the air supply direction of the third control pipeline.

The utility model discloses an in a preferred embodiment, still be equipped with air suction pipeline and diffuse pipeline on the third control pipeline, air suction pipeline is equipped with the control valve that induced drafts on the road, diffuse and be equipped with the control valve that diffuses on the pipeline.

The utility model also provides a pressure charging and discharging control method, pressure charging and discharging control method uses aforementioned hot-blast furnace pressure charging and discharging system.

In a preferred embodiment of the present invention, the charging/discharging control method includes the steps of:

under the state that the pressure discharge operation of a first hot blast stove and the pressure charging operation of a second hot blast stove are synchronously carried out, the first hot blast stove and the second hot blast stove are communicated through a stove pressure control structure, and the first hot blast stove is used for charging the second hot blast stove;

when the pressure difference value between the first hot blast stove and the second hot blast stove reaches a set value, the first hot blast stove is communicated with a gas storage device, residual waste gas in the first hot blast stove is sucked into the gas storage device for storage, the second hot blast stove is communicated with the gas storage device, and pressurized gas in the gas storage device is conveyed into the second hot blast stove for pressurization;

when the pressure of the first hot blast stove is reduced to a set value, the first hot blast stove and the gas storage device are disconnected, and the first hot blast stove and a first flue gas main pipe are communicated to finish pressure discharge;

and when the pressure of the second hot blast stove rises to a set value, the second hot blast stove, the second blast furnace and the second cold air main pipe are communicated, and the second cold air main pipe is used for conveying hot air in the second hot blast furnace into the second blast furnace.

In a preferred embodiment of the present invention, the charging/discharging control method includes the steps of:

under the condition that the pressure discharge operation of a first hot blast stove and the pressure charging operation of a second hot blast stove are not synchronously carried out, the first hot blast stove and a gas storage device are communicated, and waste gas in the first hot blast stove is input into the gas storage device for storage;

when the pressure in the first hot blast stove is reduced to a set value, the first hot blast stove and the gas storage device are disconnected, and the first hot blast stove and the first flue gas main pipe are communicated to finish pressure discharge;

when the second hot blast stove needs to be pressurized, the second hot blast stove is communicated with the gas storage device, and the gas storage device is utilized to pressurize the second hot blast stove;

and when the pressure in the second hot blast stove rises to a set value, disconnecting the second hot blast stove and the gas storage device, communicating the second hot blast stove, the second blast furnace and a second cold air main pipe, and conveying hot air in the second hot blast stove into the second blast furnace by using the second cold air main pipe.

In a preferred embodiment of the present invention, after the waste gas in the first hot blast stove is inputted into the gas storage device for storage, when the pressure of the gas storage device is lower than a predetermined value, the gas storage device is communicated with the air supply device, the air suction pipeline is opened, and the air supply device is used to supplement pressure to the gas storage device; and when the pressure of the air storage device reaches a set value, disconnecting the air supply device and the air storage device.

In a preferred embodiment of the present invention, the first hot blast stove and the second hot blast stove may alternately perform the pressure discharging operation and the pressure charging operation.

In a preferred embodiment of the present invention, the charging/discharging control method includes the steps of:

when the first hot blast stove supplies air for the first time, the first hot blast stove is communicated with the first waste gas main pipe for pressure discharge;

pumping out the atmosphere by using an air supply device and filling the atmosphere into the air storage device;

when the first hot blast stove needs to be pressurized, the gas storage device is communicated with the first hot blast stove, and the first hot blast stove is pressurized by the gas storage device.

In a preferred embodiment of the present invention, the charging/discharging control method includes the steps of:

when the second hot blast stove supplies air for the first time, the second hot blast stove is communicated with a second waste gas main pipe for pressure discharge;

pumping out the atmosphere by using an air supply device and filling the atmosphere into the air storage device;

and when the second hot blast stove needs to be pressurized, the gas storage device is communicated with the second hot blast stove, and the second hot blast stove is pressurized by utilizing the gas storage device.

In a preferred embodiment of the present invention, the charging/discharging control method includes the steps of: when the hot blast stove is overhauled, the air supply device is communicated with the first hot blast stove and/or the second hot blast stove to draft air, so that negative pressure is formed in the first hot blast stove and/or the second hot blast stove, and then the hot blast stove is overhauled.

In a preferred embodiment of the present invention, the charging/discharging control method includes the steps of: when the hot blast stove needs to be cooled, the gas storage device is communicated with the first hot blast stove and/or the second hot blast stove, and low-temperature gas in the gas storage device is filled into the first hot blast stove and/or the second hot blast stove to be cooled.

The technical scheme of the utility model following beneficial effect that is showing has:

when the hot-blast furnace is used, the hot-blast furnace charging and discharging system can utilize the first hot-blast structure to produce hot air to be conveyed into the first blast furnace, and also can utilize the second hot-blast structure to produce hot air to be conveyed into the second blast furnace, so that the air supply production process of the blast furnace is realized. In the use, when the second hot-blast furnace needs to be changed, accessible furnace pressure control structure is linked together first hot-blast furnace and second hot-blast furnace, can be with the row's in the first hot-blast furnace pressure waste gas fill in the second hot-blast furnace in order to improve the internal pressure of second hot-blast furnace through furnace pressure control structure. When the internal pressure of the second hot blast stove rises to a set value, the second cold blast main pipe can be opened, and the hot blast in the second hot blast stove is conveyed into the second blast stove by using the second hot blast pipeline.

The hot-blast furnace is filled and is arranged the pressure system and fill the wind pressurization to the second hot-blast furnace through utilizing the row's of first hot-blast furnace pressure waste gas that the stove pressure control structure can be retrieved to reduce or eliminated the pressure differential between second hot-blast furnace and the second cold air house steward, realized that the second hot-blast furnace does not have the disturbance and trades the stove operation. Because the second hot-blast furnace adds the wind pressurization back, has reduced or eliminated the pressure differential between second hot-blast furnace and the second blast furnace, at second hot-blast furnace air supply in-process, the second cold wind house steward need not to add the wind pressurization to the second hot-blast furnace, and then the second cold wind house steward can all input the air supply volume in the second blast furnace to the condition that the income stove amount of wind of second blast furnace appears reducing has been avoided. Just the utility model discloses still can fill wind pressurization operation to first hot-blast furnace through the row's of stove pressure control structure recovery second hot-blast furnace pressure waste gas to reduce or eliminated the pressure differential between first hot-blast furnace and the first cold wind house steward, realized that first hot-blast furnace does not have the disturbance and trades the stove operation. The utility model discloses can avoid first hot-blast furnace and second hot-blast furnace to cause the disturbance to first blast furnace and second blast furnace at the trade stove in-process, improve the operation stationarity of blast furnace for the output of blast furnace is more stable.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art with the benefit of the teachings of this invention can select various possible shapes and proportional dimensions to implement the invention depending on the specific situation.

FIG. 1 is a schematic structural diagram of a charging and discharging system of the hot blast stove;

FIG. 2 is a schematic structural view of the furnace pressure control structure;

fig. 3 is a schematic structural view of the first hot air structure.

Reference numbers to the above figures:

1. a first blast furnace;

2. a first hot air structure;

21. a first main pipeline; 211. a first cold air main pipe; 212. a first flue gas main; 213. a first exhaust manifold; 214. a first exhaust gas outlet control valve;

22. a first hot air pipeline; 221. a first hot air control valve;

23. a first hot blast stove;

24. a first charging and discharging pipeline; 241. a first cold air branch pipe; 242. a first flue gas branch pipe; 243. a first exhaust branch pipe; 244. a first cold air control valve; 245. a first flue gas control valve; 246. a first exhaust gas control valve;

3. a second blast furnace;

4. a second hot air structure;

41. a second main pipe; 411. a second cold air main; 412. a second flue gas main; 413. a second exhaust manifold; 414. a second exhaust gas outlet control valve;

42. a second hot air pipeline; 421. a second hot air control valve;

43. a second hot blast stove;

44. a second charging and discharging pipeline; 441. a second cold air branch pipe; 442. a second flue gas branch pipe; 443. a second exhaust branch pipe; 444. a second cold air control valve; 445. a second flue gas control valve; 446. a second exhaust gas control valve;

5. a furnace pressure control structure;

51. a third control line; 511. a first shut-off valve; 512. a first regulating valve; 513. a second shut-off valve; 514. an air intake pipeline; 515. a blow-off line; 516. an air suction control valve; 517. a bleeding control valve;

52. an air supply device;

53. a third charging and discharging pipeline; 531. a first exhaust gas collection pipe; 532. a first gas delivery branch pipe; 533. a first exhaust collection control valve; 534. a first gas delivery control valve;

54. a fourth charging and discharging pipeline; 541. a second exhaust gas collection pipe; 542. a second gas delivery branch pipe; 543. a second exhaust gas collection control valve; 544. a second gas delivery control valve;

55. a gas storage device;

6. and (4) a chimney.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, fig. 2 and fig. 3, in an embodiment of the present invention, a charging and discharging system for a hot blast stove is provided, including: the first hot air structure 2 is used for being connected with a first blast furnace 1, the first hot air structure 2 comprises a first main pipeline 21, a first hot air pipeline 22 connected with the first blast furnace 1, a first hot air furnace 23 arranged on the first hot air pipeline 22, and a first charging and discharging pipeline 24 arranged between the first hot air furnace 23 and the first main pipeline 21, the first main pipeline 21 comprises a first cold air main pipe 211, a first flue gas main pipe 212 and a first waste gas main pipe 213 which are arranged in parallel, the first charging and discharging pipeline 24 comprises a first cold air branch pipe 241 connected with the first hot air furnace 23 and the first cold air main pipe 211, a first flue gas branch pipe 242 connected with the first hot air furnace 23 and the first flue gas main pipe 212, and a first waste gas branch pipe 243 connected with the first hot air furnace 23 and the first waste gas main pipe 213; the second hot air structure 4 is used for connecting with a second blast furnace 3, the second hot air structure 4 comprises a second main pipeline 41, a second hot air pipeline 42 connected with the second blast furnace 3, a second hot air furnace 43 arranged on the second hot air pipeline 42, and a second charging and discharging pipeline 44 arranged between the second hot air furnace 43 and the second main pipeline 41, and the second main pipeline 41 comprises a second cold air main 411, a second flue gas main 412 and a second exhaust gas main 413 which are arranged in parallel; the second charging and discharging line 44 comprises a second cold-blast branch pipe 441 connecting the second hot blast stove 43 and the second cold-blast main 411, a second flue gas branch pipe 442 connecting the second hot blast stove 43 and the second flue gas main 412, and a second flue gas branch pipe 443 connecting the second hot blast stove 43 and the second flue gas main 413; a furnace pressure control structure 5 disposed between the first exhaust gas manifold 213 and the second exhaust gas manifold 413, the furnace pressure control structure 5 controllably communicating the first hot blast stove 23 and the second hot blast stove 43; when the second hot blast stove 43 is in the stove-changing state, the first hot blast stove 23 can charge air and pressurize the second hot blast stove 43 through the stove pressure control structure 5.

On the whole, when hot-blast furnace fills row pressure system uses, can utilize in first hot-blast structure 2 produces hot-blast conveying and advances first blast furnace 1, also can utilize in second hot-blast structure 4 produces hot-blast conveying and advances second blast furnace 3 for blast furnace air supply production process. In the use process, when the second hot blast stove 43 needs to be replaced, the first hot blast stove 23 and the second hot blast stove 43 can be communicated through the furnace pressure control structure 5, and the pressure discharge waste gas in the first hot blast stove 23 can be filled into the second hot blast stove 43 through the furnace pressure control structure 5 so as to improve the internal pressure of the second hot blast stove 43. When the internal pressure of the second hot blast stove 43 rises to a set value, the second cold air header pipe 411 is opened, and the hot air in the second hot blast stove 43 is delivered into the second blast furnace 3 by the second hot air pipeline 42. When the second hot blast stove 43 is provided with a plurality of seats, the second hot blast stove 43 can be sequentially replaced to ensure the stable production of the second blast furnace 3, and the second hot blast stove 43 in the furnace replacement state can be pressurized by the furnace pressure control structure 5.

The hot-blast furnace fills row and presses system to fill wind pressurization to second hot-blast furnace 43 through utilizing the row of pressing waste gas that stove pressure control structure 5 can retrieve first hot-blast furnace 23 to reduce or eliminated the pressure differential between second hot-blast furnace 43 and second cold wind house steward 411, realized that second hot-blast furnace 43 does not have the disturbance and trades the stove operation. Because the second hot-blast furnace 43 is through filling the wind pressurization back, reduced or eliminated the pressure differential between second hot-blast furnace 43 and the second cold air main 411, in the air supply process of second hot-blast furnace 43, second cold air main 411 need not to fill the wind pressurization to second hot-blast furnace 43, and then second cold air main 411 can be with in the second blast furnace 3 of whole air supply input to the circumstances that the income stove amount of wind of second blast furnace 3 appears reducing has been avoided. Just the utility model discloses still can retrieve the row who presses waste gas of second hot-blast furnace 43 through stove pressure control structure 5 and fill wind pressurization operation to first hot-blast furnace 23 to reduce or eliminated the pressure differential between first hot-blast furnace 23 and the first cold wind house steward 211, realized that first hot-blast furnace 23 does not have the disturbance and trades the stove operation. The utility model discloses can avoid first hot-blast furnace 23 and second hot-blast furnace 43 to trade the stove in-process and cause the disturbance to first blast furnace 1 and second blast furnace 3, improve the operating stability of blast furnace for the output of blast furnace is more stable.

The types of the first blast furnace 1 and the second blast furnace 3 are not limited here, and the types of the first hot blast furnace 23 and the second hot blast furnace 43 are not limited here. And to facilitate smoke evacuation, a user may communicate the first flue gas manifold 212 and the first flue gas manifold 213 with the stack 6, and communicate the second flue gas manifold 412 and the second flue gas manifold 413 with the stack 6.

In the embodiment of the present invention, the furnace pressure control structure 5 includes a third control pipeline 51, an air supply device 52 disposed on the third control pipeline 51, a third charging and discharging pipeline 53 disposed between the third control pipeline 51 and the first exhaust gas main pipe 213, and a fourth charging and discharging pipeline 54 disposed between the third control pipeline 51 and the second exhaust gas main pipe 413, wherein the third charging and discharging pipeline 53 is controllably communicated with the third control pipeline 51 and the first exhaust gas main pipe 213, and the fourth charging and discharging pipeline 54 is controllably communicated with the third control pipeline 51 and the second exhaust gas main pipe 413.

When first hot-blast furnace 23 needs to pressurize, when second hot-blast furnace 43 is in the row's of pressure state, through 5 first hot-blast furnaces 23 of intercommunication of furnace pressure control structure and second hot-blast furnace 43, the row's of utilizing air supply arrangement 52 to extract second hot-blast furnace 43 presses the waste gas input and is used for filling wind pressurization to first hot-blast furnace 23 in 23, thereby the pressure differential between first hot-blast furnace 23 and first cold air main 211 has been reduced or eliminated, the undisturbed stove operation of changing of first hot-blast furnace 23 has been realized, and then the operating stability of first blast furnace 1 has been improved, make the output of first blast furnace 1 more stable. And the first hot blast stove 23 is charged with air and pressurized in a pressure exhaust gas extraction mode of the second hot blast stove 43, so that the pressure exhaust gas in the second hot blast stove 43 can be recycled, and the direct emission of the pressure exhaust gas is prevented from causing resource and energy loss.

When second hot-blast furnace 43 needs to pressurize, when first hot-blast furnace 23 is in the row's of pressing state, then can utilize air supply arrangement 52 to extract the row's of first hot-blast furnace 23 pressure exhaust gas input second hot-blast furnace 43 in be used for filling the wind pressurization to second hot-blast furnace 43, thereby the pressure differential between second hot-blast furnace 43 and second cold wind house steward 411 has been reduced or eliminated, realize that second hot-blast furnace 43 does not have the disturbance and trade the stove operation, and then improve the operating stability of second blast furnace 3, make the output of second blast furnace 3 more stable. And the second hot blast furnace 43 is charged with air and pressurized in a pressure exhaust gas extraction mode of the first hot blast furnace 23, so that the pressure exhaust gas in the first hot blast furnace 23 can be recycled, and the direct emission of the pressure exhaust gas is prevented from causing resource and energy loss.

In the embodiment of the present invention, the hot blast stove pressure charging and discharging system further comprises a gas storage device 55 on the third control pipeline 51, and the air supply device 52 can charge air and pressurize the gas storage device 55.

Through setting up gas storage device 55, when the pressurization process and the row of first hot-blast furnace 23 and second hot-blast furnace 43 are asynchronous, then can earlier extract the row's of the interior pressure waste gas of first hot-blast furnace 23 to store in gas storage device 55, when second hot-blast furnace 43 need fill the wind pressurization, then utilize gas storage device 55 to fill the wind pressurization to second hot-blast furnace 43 to realize that second hot-blast furnace 43 does not have the disturbance and trades the stove operation. Of course, the user may also store the discharged pressure exhaust gas in the second hot blast stove 43 in the gas storage device 55, and when the first hot blast stove 23 needs to be charged with air and pressurized, the first hot blast stove 23 is charged with air and pressurized by using the gas storage device 55.

Wherein, the gas storage device 55 can be a gas storage tank. Of course, the designer can also configure the gas storage device 55 into other structures, which is not limited herein.

In the embodiment of the present invention, the outlet of the first exhaust manifold 213 is provided with a first exhaust outlet control valve 214, and the outlet of the second exhaust manifold 413 is provided with a second exhaust outlet control valve 414.

By closing the first exhaust gas outlet control valve 214 and the second exhaust gas outlet control valve 414, the exhaust pressure exhaust gas in the first hot blast stove 23 or the second hot blast stove 43 can be prevented from being discharged.

In an embodiment of the present invention, a first hot air control valve 221 is disposed on the first hot air pipeline 22, the first hot air control valve 221 is disposed between the first blast furnace 1 and the first hot air furnace 23, a first cold air control valve 244 is disposed on the first cold air branch pipe 241, a first flue gas control valve 245 is disposed on the first flue gas branch pipe 242, and a first waste gas control valve 246 is disposed on the first waste gas branch pipe 243.

The connection or the closing of the pipelines can be realized through the cooperation of the first hot air control valve 221, the first cold air control valve 244 and the first waste gas control valve 246, so that the furnace pressure control structure 5 can be conveniently controlled to realize the pressure charging and discharging operation of the first hot blast furnace 23. Of course, the designer may also set other devices on each pipeline, which is not limited herein.

In the embodiment of the present invention, the first hot-blast stove 23 is provided with a plurality of, every in parallel the first hot-blast stove 23 with all correspond between the first blast furnace 1 and be equipped with the first hot-blast control valve 221, every the first hot-blast stove 23 with all correspond between the first main pipeline 21 and be equipped with the first row pipeline 24 that fills.

Wherein the plurality may be two or more. Through setting up many first hot-blast stoves 23, some first hot-blast stoves 23 can be in combustion state and be used for the heat accumulation, and another part first hot-blast stove 23 is in the air supply state and is used for guaranteeing first blast furnace 1 production, thereby has guaranteed the stable production process of first blast furnace 1 through many first hot-blast stoves 23 mutually supporting. For example, two first hot blast stoves 23 may be provided, and a one-firing one-feeding operation system may be adopted between the two first hot blast stoves 23. Or, three first hot-blast stoves 23 can be arranged, and a working system of two-burning and one-feeding can be adopted among the three first hot-blast stoves 23. Or, four first hot blast stoves 23 can be arranged, and a two-burning and two-feeding working system can be adopted among the four first hot blast stoves 23. Of course, the designer can also determine the setting number and the working system of the first hot blast stoves 23 according to the use requirement, and the design is not limited herein.

In the embodiment of the present invention, a second hot air control valve 421 is disposed on the second hot air pipeline 42, the second hot air control valve 421 is disposed on the second hot air pipeline 3, and between the second hot air furnaces 43, a second cold air control valve 444 is disposed on the second cold air branch pipe 441, a second flue gas control valve 445 is disposed on the second flue gas branch pipe 442, and a second waste gas control valve 446 is disposed on the second waste gas branch pipe 443.

The second hot air control valve 421, the second cold air control valve 444 and the second waste air control valve 446 are matched to realize the communication or the closing of each pipeline, so that the furnace pressure control structure 5 is conveniently controlled to realize the pressure charging and discharging operation of the second hot blast furnace 43. Of course, the designer may also set other devices on each pipeline, which is not limited herein.

The utility model discloses an in the embodiment, second hot-blast furnace 43 connects in parallel and is provided with a plurality ofly, every second hot-blast furnace 43 with all correspond between the second blast furnace 3 and be equipped with second hot-blast control valve 421, every second hot-blast furnace 43 with all correspond between the total pipeline 41 of second and be equipped with the second fills row pipeline 44.

Wherein the plurality may be two or more. Through setting up many second hot-blast stoves 43, a part of second hot-blast stove 43 can be in combustion state and be used for the heat accumulation, and another part second hot-blast stove 43 is in the air supply state and is used for guaranteeing the production of second blast furnace 3, thereby has guaranteed the stable production process of second blast furnace 3 through many second hot-blast stoves 43 mutually supporting. For example, two second hot blast stoves 43 may be provided, and a one-firing one-feeding operation system may be adopted between the two second hot blast stoves 43. Or, three second hot blast stoves 43 can be arranged, and a working system of two burning and one feeding can be adopted among the three second hot blast stoves 43. Alternatively, four second hot blast stoves 43 may be provided, and a two-burning and two-feeding working regime may be adopted between the four second hot blast stoves 43. Of course, the designer can also determine the number of the second hot blast stoves 43 and the working system according to the use requirement, which is not limited herein.

The first hot blast stove 23 and the second hot blast stove 43 can be correspondingly provided with the same quantity, and the air supply period of each first hot blast stove 23 is the same as that of each corresponding second hot blast stove 43. When the plurality of first hot blast stoves 23 are subjected to pressure discharge operation, the corresponding plurality of second hot blast stoves 43 can be subjected to pressure charging operation synchronously, so that the pressure discharge waste gas of the first hot blast stoves 23 is recycled. Of course, the designer may also adjust the arrangement of the first hot blast stove 23 and the second hot blast stove 43 according to the use requirement, which is not limited herein.

The utility model discloses an in the embodiment, third fills row pipeline 53 is including parallelly connected first exhaust gas collecting pipe 531 and the first gas transmission branch pipe 532 that sets up, be equipped with first waste gas collection control valve 533 on the first exhaust gas collecting pipe 531, be equipped with first gas transmission control valve 534 on the first gas transmission branch pipe 532, first exhaust gas collecting pipe 531 is connected in a controlled manner first exhaust gas main 213 and the import of third control pipeline 51, first gas transmission branch pipe 532 is connected in a controlled manner first exhaust gas main 213 and the export of third control pipeline 51.

The pressure-discharging waste gas in the first waste gas main pipe 213 can be conveyed into the inlet of the third control pipeline 51 through the first waste gas collecting pipe 531, so that the pressure-discharging waste gas can be conveyed into the gas storage device 55 or the second hot blast stove 43 by matching with the air supply device 52. The charging gas in the third control line 51 can be fed into the first exhaust gas main 213 via the first gas feed branch 532 and thus into the first hot blast stove 23 for charging and pressurizing the first hot blast stove 23.

In the embodiment of the present invention, the fourth exhaust gas filling and discharging pipeline 54 includes a second exhaust gas collecting pipe 541 and a second gas transmission branch pipe 542 which are arranged in parallel, a second exhaust gas collecting control valve 543 is disposed on the second exhaust gas collecting pipe 541, a second gas transmission control valve 544 is disposed on the second gas transmission branch pipe 542, the second exhaust gas collecting pipe 541 is controllably connected to the second exhaust gas main pipe 413 and the inlet of the third control pipeline 51, and the second gas transmission branch pipe 542 is controllably connected to the second exhaust gas main pipe 413 and the outlet of the third control pipeline 51.

The pressure-discharge waste gas in the second waste gas collecting pipe 413 can be conveyed into the inlet of the third control pipeline 51 through the second waste gas collecting pipe 541, so that the pressure-discharge waste gas can be conveyed into the gas storage device 55 or the first hot blast stove 23 by matching with the air supply device 52. The charging gas in the third control line 51 can be fed via the second gas feed branch 542 to the second exhaust gas manifold 413 and thus into the second hot blast stove 43 for charging and pressurizing the second hot blast stove 43.

Specifically, along the air supply direction of the third control pipeline 51, the third control pipeline 51 is sequentially provided with the air supply device 52, a first cut-off valve 511, the air storage device 55, a first regulating valve 512, and a second cut-off valve 513.

Of course, the designer may also set additional other devices on the third control pipeline 51 according to the use requirement, which is not limited herein.

The third control pipeline 51 is further provided with an air suction pipeline 514 and a bleeding pipeline 515, the air suction pipeline 514 is provided with an air suction control valve 516, and the bleeding pipeline 515 is provided with a bleeding control valve 517.

Of course, the designer may also set a controller and a pressure transmission on the hot blast furnace pressure charging and discharging system, where the pressure transmission may be set on the first hot blast furnace 23, the second hot blast furnace 43, and the gas storage device 55 to obtain pressure data, and the controller may control the opening and closing of each valve based on the obtained pressure data, so as to implement an automatic control process of the hot blast furnace pressure charging and discharging system. The type and the arrangement position of the controller and the pressure transmission are not limited herein. Of course, the designer may also set a temperature sensor on the hot blast stove pressure and charge system to obtain temperature data, so that the controller can control the operation of the hot blast stove pressure and charge system based on the temperature data and the pressure data, which is not limited herein. Of course, the designer may also provide other devices on the first and second hot blast stoves 23, 43, without limitation here.

Under a specific scene, for example to current blast furnace production system, utilize the utility model provides a technical scheme can reform transform blast furnace production system among the prior art through the mode that fills row pipeline 24 and second and fill row pipeline 44 pipeline through increasing third control pipeline 51 and the first between two or more blast furnaces to can cooperate between the blast furnace among the messenger prior art and realize the undisturbed process of changing a furnace, and then improve blast furnace production system's among the prior art production stability and production productivity. And through transforming formation to the blast furnace production system among the prior art the utility model discloses a hot-blast furnace fills the exhaust system and can also retrieve the row's of the hot-blast furnace and press waste gas, realizes that row's pressure waste gas recycles, and can prevent that row's pressure waste gas from discharging and causing air pollution and thermal pollution in the atmosphere. The designer reforms transform through the blast furnace production system among the prior art, can obtain the hot-blast furnace trades stove system in coordination, and it is little to reform transform the engineering volume, reforms transform with low costsly, and adaptability is wide.

The utility model also provides a pressure charging and discharging control method, the pressure charging and discharging control method uses the hot-blast stove pressure charging and discharging system in the preceding embodiment. The specific structure, working principle and beneficial effects of the hot blast stove charging and discharging system are the same as those in the previous embodiment, and are not described again here.

In an embodiment of the present invention, the charging and discharging control method includes the following steps:

under the state that the pressure discharge operation of the first hot blast stove 23 and the pressure charging operation of the second hot blast stove 43 are synchronously carried out, the first hot blast stove 23 and the second hot blast stove 43 are communicated through the stove pressure control structure 5, and the first hot blast stove 23 is utilized to charge the second hot blast stove 43.

When the pressure difference between the first hot blast stove 23 and the second hot blast stove 43 reaches a first set value, the first hot blast stove 23 and the gas storage device 55 are communicated, residual waste gas in the first hot blast stove 23 is sucked into the gas storage device 55 for storage, the second hot blast stove 43 and the gas storage device 55 are communicated at the same time, and pressurized gas in the gas storage device 55 is conveyed into the second hot blast stove 43 for pressurization.

When the pressure of the first hot blast stove 23 is reduced to a second set value, the first hot blast stove 23 and the gas storage device 55 are disconnected, and the first hot blast stove 23 and the first flue gas main pipe 212 are communicated to complete pressure discharge.

When the pressure of the second hot blast stove 43 rises to a third set value, the second hot blast stove 43, the second blast furnace 3 and the second cold blast main pipe 411 are communicated, and the hot blast in the second hot blast stove 43 is conveyed into the second blast furnace 3 by using the second hot blast pipeline 42.

Specifically, the first exhaust outlet control valve 214, the second exhaust outlet control valve 414, the suction control valve 516, the blow-off control valve 517, the second shut-off valve 513, the first exhaust collection control valve 533, and the second exhaust collection control valve 543 are closed. First exhaust control valve 246, second exhaust control valve 446, first gas delivery control valve 534, and second gas delivery control valve 544 are opened. At this time, the first hot blast stove 23 is communicated with the second hot blast stove 43, and the pressure-discharging waste gas in the first hot blast stove 23 automatically flows into the second hot blast stove 43 under the pressure effect, so as to perform spontaneous air-charging pressurization operation on the second hot blast stove 43.

When the difference between the internal pressures of the first hot blast stove 23 and the second hot blast stove 43 reaches a first set value, the first gas transmission control valve 534 is closed, the first waste gas collection control valve 533 and the second cut-off valve 513 are opened, the first hot blast stove 23 is communicated with the air supply device 52, at this time, the air supply device 52 is started, and the residual waste gas in the first hot blast stove 23 is sucked out by the air supply device 52. When the gas storage device 55 is provided, the sucked residual waste gas is stored in the gas storage device 55, and then the residual waste gas with pressure is input into the second hot blast stove 43 through the gas storage device 55, so as to perform the air charging and pressurizing operation on the second hot blast stove 43 again. When no gas storage means 55 is provided, the residual exhaust gas sucked out can be fed directly into the second hot blast stove 43.

When the internal pressure of the first hot blast stove 23 decreases to the second set value, the first flue gas control valve 245 is opened, and the pressure discharge operation of the first hot blast stove 23 is completed;

when the internal pressure of the second hot blast stove 43 rises to the third set value, the air charging and pressurizing operation of the second hot blast stove 43 is completed, the second cold air control valve 444 and the second hot air control valve 421 are opened, and the second hot blast stove 43 delivers hot air to the second blast furnace 3;

finally, the blower 52 is closed, and the first exhaust gas control valve 246, the second exhaust gas control valve 446, the first exhaust gas collection control valve 533, the second shutoff valve 513, and the second air delivery control valve 544 are closed.

The user can determine the first set value, the first set value and the specific numerical value of the first set value according to the type and production requirement of each hot blast stove and blast furnace, and the method is not limited herein. For example, when the pressure discharge operation of the first hot blast stove 23 and the pressure charging operation of the second hot blast stove 43 are performed synchronously, the first hot blast stove 23 and the second hot blast stove 43 are communicated through the stove pressure control structure 5, and the second hot blast stove 43 is automatically charged by using the pressure discharge waste gas in the first hot blast stove 23, so that about half of the pressure discharge waste gas in the first hot blast stove 23 enters the second hot blast stove 43 under the action of pressure difference to automatically charge and pressurize the second hot blast stove 43, when a first set value is reached, that is, when the pressure difference in the first hot blast stove 23 and the second hot blast stove 43 is balanced, it can be considered that the first set value is reached, and at this time, the first set value is about 0. Of course, the designer may set the first setting value to other sizes according to production requirements, and is not limited herein. Moreover, the user can determine the values of the second set value and the third set value according to the production requirement, which is not limited herein. Of course, the user can adjust the use steps according to the production needs of the blast furnace, and the method is not limited here.

Of course, as another alternative implementation of the charging and discharging pressure control method, in this embodiment, the charging and discharging pressure control method may further include the following steps:

under the condition that the pressure discharge operation of the first hot blast stove 23 and the pressure charging operation of the second hot blast stove 43 are not synchronously carried out, the first hot blast stove 23 is communicated with the gas storage device 55, and the waste gas in the first hot blast stove 23 is input into the gas storage device 55 for storage;

when the pressure in the first hot blast stove 23 is reduced to a fourth set value, the first hot blast stove 23 and the gas storage device 55 are disconnected, and the first hot blast stove 23 and the first flue gas main pipe 212 are communicated to finish pressure discharge;

when the second hot blast stove 43 needs to be pressurized, the second hot blast stove 43 is communicated with the gas storage device 55, and the second hot blast stove 43 is pressurized by using the gas storage device 55;

when the pressure in the second hot blast stove 43 rises to a fifth set value, the second hot blast stove 43 and the gas storage device 55 are disconnected, the second hot blast stove 43, the second blast furnace 3 and the second cold air main pipe 411 are communicated, and the hot air in the second hot blast stove 43 is conveyed into the second blast furnace 3 by using the second hot air pipeline 42.

Specifically, when the first hot blast stove 23 needs to perform the pressure discharge operation, the first waste gas outlet control valve 214, the suction control valve 516, the bleeding control valve 517 and the first gas delivery control valve 534 are closed.

The first exhaust gas control valve 246, the first exhaust gas collection control valve 533, and the first cutoff valve 511 are opened, the air blowing device 52 is started, and the pressure-exhaust gas in the first hot blast stove 23 is sucked into the gas storage device 55 for storage.

When the internal pressure of the first hot blast stove 23 drops to the fourth set value, the first flue gas control valve 245 is opened, the air supply device 52 is closed, and the first exhaust gas control valve 246 and the first exhaust gas collection control valve 533 are closed, so that the pressure discharge operation of the first hot blast stove 23 is completed.

When the second hot blast stove 43 needs to be charged with air and pressurized, the second cut-off valve 513, the second gas transmission control valve 544 and the second exhaust gas control valve 446 are opened, so that the second hot blast stove 43 is communicated with the gas storage device 55, and the gas storage device 55 inputs pressurized gas into the second hot blast stove 43 to charge and pressurize the second hot blast stove 43 with air.

When the internal pressure of the second hot blast stove 43 rises to the fifth set value, the air charging and pressurizing operation of the second hot blast stove 43 is completed, and at this time, the second cold air control valve 444 and the second hot air control valve 421 are opened, and the second shut valve 513, the second air delivery control valve 544, and the second exhaust gas control valve 446 are closed.

Of course, the user may also store the exhaust gas from the second hot blast stove 43 in the gas storage device 55, and when the first hot blast stove 23 needs to be charged and pressurized, the first hot blast stove 23 is charged and pressurized by using the gas storage device 55, which is not limited herein.

The user can determine the specific values of the fourth set value and the fifth set value according to the type and production requirement of each hot blast stove and blast furnace, and the method is not limited herein.

In the embodiment of the present invention, after the pressure-discharging exhaust gas in the first hot blast stove 23 is input into the gas storage device 55 for storage, when the pressure of the gas storage device 55 is lower than a set value, the gas storage device 55 and the air supply device 52 are communicated, the air suction pipeline 514 is opened, and the air supply device 52 is used to supplement the pressure to the gas storage device 55; when the pressure of the air storage device 55 reaches the sixth set value, the air supply device 52 and the air storage device 55 are disconnected.

Specifically, the first exhaust gas collection control valve 533 and the second exhaust gas collection control valve 543 are closed, the suction control valve 516 is opened, and the blower 52 is started to draw out the atmospheric air and fill the atmospheric air into the air storage device 55 for pressure compensation until the internal pressure of the air storage device 55 reaches the sixth setting value. The user can determine the specific values of the fourth set value and the fifth set value according to the types and production requirements of the hot blast furnaces and the blast furnace, and the method is not limited herein.

When the pressure of the gas storage device 55 is lower than the set value after the pressure-discharging exhaust gas in the second hot blast stove 43 is input into the gas storage device 55 for storage, the pressure compensation operation can also be performed, which is not limited herein.

By providing the gas storage device 55, the exhaust gas from the first hot blast stove 23 can be pumped into the gas storage device 55 by the air supply device 52 for storage. When the second hot blast stove 43 needs to be fully pressurized, the pre-stored sufficient gas is input into the second hot blast stove 43 by the gas storage device 55 for air charging and pressurizing operation, so as to increase the internal pressure of the second hot blast stove 43. The problem that the pressure discharge operation of the first hot blast stove 23 and the air charging and pressurizing operation of the second hot blast stove 43 are asynchronous can be solved by arranging the gas storage device 55, and the applicability of the hot blast stove pressure charging and discharging system is improved.

Of course, the user may also use the gas storage device 55 to store the exhaust gas of the second hot blast stove 43, and when the first hot blast stove 23 needs to be sufficiently pressurized, the charging gas in the gas storage device 55 is used to charge and pressurize the first hot blast stove 23, which is not limited herein.

In an embodiment of the present invention, the first hot blast stove 23 and the second hot blast stove 43 may alternately perform the pressure discharge operation and the pressure charging operation. The pressure discharge operation and the pressure charging operation are alternately performed through the first hot blast stove 23 and the second hot blast stove 43, the pressure discharge waste gas of the first hot blast stove 23 can be used for performing the air charging and pressure charging operation on the second hot blast stove 43, and the undisturbed stove changing process of the second hot blast stove 43 is further realized. Or, the exhaust pressure waste gas of the second hot blast stove 43 is used for carrying out air charging and pressurizing operation on the first hot blast stove 23, so that the undisturbed stove changing process of the first hot blast stove 23 is realized. And the exhaust pressure waste gas of the first hot blast stove 23 and the second hot blast stove 43 is utilized for air inflation and pressurization, the effect of recovering the exhaust pressure waste gas can be achieved, and the problem of resource and energy waste caused by direct emission of the exhaust pressure waste gas can be prevented.

Of course, the first exhaust gas control valve 246 and the first exhaust gas outlet control valve 214 may be opened, the exhaust pressure exhaust gas in the first hot blast stove 23 may be directly discharged through the first exhaust gas branch pipe 243 and the first exhaust gas main pipe 213, then the suction control valve 516 is opened, the air blowing device 52 is started, and the air blowing device 52 draws the atmosphere and fills the atmosphere into the air storage device 55. When the second hot blast stove 43 needs to be charged with air and pressurized, the second shut-off valve 513, the second gas transmission control valve 544 and the second exhaust gas control valve 446 are opened to communicate the gas storage device 55 with the second hot blast stove 43, and the second hot blast stove 43 is charged with air and pressurized by the gas storage device 55. Of course, the above operation of the first hot blast stove 23 by the gas storage device 55 can be performed, but is not limited thereto.

Of course, as another alternative implementation of the charging and discharging pressure control method, in this embodiment, the charging and discharging pressure control method may further include the following steps: when the first hot blast stove 23 is firstly fed, the first hot blast stove 23 is communicated with the first waste gas main pipe 213 for pressure discharge; the air supply device 52 is used for pumping the atmosphere and filling the atmosphere into the air storage device 55; when the first hot blast stove 23 needs to be pressurized, the gas storage device 55 is communicated with the first hot blast stove 23, and the first hot blast stove 23 is pressurized by using the gas storage device 55.

Through carrying out the exhaust pressure operation to first hot-blast furnace 23 earlier, then utilize air supply arrangement 52 to extract the atmosphere and add the wind pressurization to the settlement internal pressure with first hot-blast furnace 23, can increase the internal pressure of first hot-blast furnace 23 fast, and then eliminate the pressure differential between first cold air main 211 and the first hot-blast furnace 23, can reduce the furnace pressure disturbance in first blast furnace 1, improve the production stability of first blast furnace 1.

Of course, as another alternative implementation of the charging and discharging pressure control method, in this embodiment, the charging and discharging pressure control method includes the following steps: when the second hot blast stove 43 is firstly fed, the second hot blast stove 43 is communicated with the second exhaust gas main pipe 413 for pressure discharge; the air supply device 52 is used for pumping the atmosphere and filling the atmosphere into the air storage device 55; when the second hot blast stove 43 needs to be pressurized, the gas storage device 55 is communicated with the second hot blast stove 43, and the second hot blast stove 43 is pressurized by using the gas storage device 55.

Through carrying out the exhaust pressure operation to second hot-blast furnace 43 earlier, then utilize air supply arrangement 52 to extract the atmosphere and fill the wind pressurization with second hot-blast furnace 43 to the settlement internal pressure, can increase the internal pressure of second hot-blast furnace 43 fast, and then eliminate the pressure differential between second blast furnace 3 and the second hot-blast furnace 43, can reduce the furnace pressure disturbance in the second blast furnace 3, improve the production stability of second blast furnace 3.

Of course, as another alternative implementation of the charging and discharging pressure control method, in this embodiment, the charging and discharging pressure control method includes the following steps: when the hot blast stove is overhauled, the air supply device 52 is communicated with the first hot blast stove 23 and/or the second hot blast stove 43 to exhaust air, so that negative pressure is formed in the first hot blast stove 23 and/or the second hot blast stove 43, and then the hot blast stove is overhauled.

Specifically, when the first hot-blast stove 23 needs to be maintained, the first exhaust gas outlet control valve 214, the air suction control valve 516 and the first cut-off valve 511 are closed, the first exhaust gas control valve 246, the first exhaust gas collection control valve 533 and the blow-off control valve 517 are sequentially opened, the air supply device 52 is started to perform air suction operation on the first hot-blast stove 23, the first hot-blast stove 23 is made to form a negative pressure state, and therefore the internal hot air of the first hot-blast stove 23 is prevented from being sprayed out from the maintenance part. Of course, the user may also perform the above-mentioned suction negative pressure operation on the second hot blast stove 43, which is not limited herein.

By extracting hot air in the first hot blast stove 23 or the second hot blast stove 43 by using the air supply device 52, the safety risk caused by the ejection of the hot air in the hearth from the access hole in the maintenance process can be prevented.

Of course, as another alternative implementation of the charging and discharging pressure control method, in this embodiment, the charging and discharging pressure control method includes the following steps: when the hot blast stove needs to be cooled, the gas storage device 55 is communicated with the first hot blast stove 23 and/or the second hot blast stove 43, and low-temperature gas in the gas storage device 55 is filled into the first hot blast stove 23 and/or the second hot blast stove 43 for cooling.

Specifically, when the first hot blast stove 23 is cooled, the first waste gas control valve 246, the second shut-off valve 513, the first gas transmission control valve 534, and the first regulating valve 512 are opened to communicate the gas storage device 55 with the first hot blast stove 23, so that the first hot blast stove 23 is cooled by the gas of lower temperature in the gas storage device 55. The cooling gas in the gas storage device 55 can be charged into the first hot-blast stove 23 from the bottom of the first hot-blast stove 23, so that the bottom-related equipment of the first hot-blast stove 23 is cooled, the equipment in the first hot-blast stove 23 is prevented from being damaged by high temperature, and the service life of the first hot-blast stove 23 is prolonged. Of course, the user also cools the second hot blast stove 43 in the above manner to improve the service life of the second hot blast stove 43, which is not limited herein.

For example, when the temperature of the components such as the grate and the lower refractory material in the hot blast stove is too high, the air supply device 52 can rapidly charge the relatively low-temperature gas in the gas storage device 55 into the first hot blast stove 23 and/or the second hot blast stove 43 to be cooled, and the gas in the gas storage device 55 is used for cooling the first hot blast stove 23 and/or the second hot blast stove 43, so that the first hot blast stove 23 and the second hot blast stove 43 can be prevented from being out of control, and the use safety of the hot blast stoves is improved.

The utility model discloses a this pressure control method that fills can reduce or eliminate the pressure differential between first hot-blast furnace 23 and the first cold air house steward 211 to realize the undisturbed stove operation that trades of first hot-blast furnace 23, improved the operating stability of first blast furnace 1, make the output of first blast furnace 1 more stable. And the pressure difference between the second hot blast stove 43 and the second cold air main pipe 411 can be reduced or eliminated by the charging and discharging pressure control method, so that the undisturbed stove changing operation of the second hot blast stove 43 is realized, the running stability of the second blast furnace 3 is improved, and the yield of the second blast furnace 3 is more stable. And the pressure-discharge waste gas in the first hot-blast stove 23 or the second hot-blast stove 43 can be recycled through the pressure-charging control method, and the problem of resource and energy waste caused by the pressure-discharge waste can be solved.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of 8230to describe a combination shall include the identified element, ingredient, component or step and other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (12)

1. A hot blast stove charging and discharging system is characterized by comprising:

the first hot air structure comprises a first main pipeline, a first hot air pipeline connected with the first blast furnace, a first hot air furnace arranged on the first hot air pipeline, and a first charging and discharging pipeline arranged between the first hot air furnace and the first main pipeline, wherein the first main pipeline comprises a first cold air main pipe, a first flue gas main pipe and a first waste gas main pipe which are arranged in parallel, the first charging and discharging pipeline comprises a first cold air branch pipe connected with the first hot air furnace and the first cold air main pipe, a first flue gas branch pipe connected with the first hot air furnace and the first flue gas main pipe, and a first waste gas branch pipe connected with the first hot air furnace and the first waste gas main pipe;

the second hot air structure is used for being connected with a second blast furnace and comprises a second main pipeline, a second hot air pipeline connected with the second blast furnace, a second hot air furnace arranged on the second hot air pipeline and a second charging and discharging pipeline arranged between the second hot air furnace and the second main pipeline, and the second main pipeline comprises a second cold air main pipe, a second flue gas main pipe and a second waste gas main pipe which are arranged in parallel; the second charging and discharging pipeline comprises a second cold air branch pipe connected with the second hot air furnace and the second cold air main pipe, a second flue gas branch pipe connected with the second hot air furnace and the second flue gas main pipe, and a second waste gas branch pipe connected with the second hot air furnace and the second waste gas main pipe;

a furnace pressure control structure disposed between the first exhaust gas main and the second exhaust gas main, the furnace pressure control structure controllably communicating the first and second hot blast stoves;

and when the second hot blast stove is in a stove changing state, the first hot blast stove can charge air and pressurize the second hot blast stove through the stove pressure control structure.

2. The hot blast stove pressure charging and discharging system of claim 1, wherein the stove pressure control structure comprises a third control line, a blower disposed on the third control line, a third charging and discharging line disposed between the third control line and the first exhaust gas manifold, and a fourth charging and discharging line disposed between the third control line and the second exhaust gas manifold, the third charging and discharging line controllably communicating the third control line and the first exhaust gas manifold, the fourth charging and discharging line controllably communicating the third control line and the second exhaust gas manifold.

3. The hot blast stove pressure charging and discharging system of claim 2, further comprising a gas storage device disposed on the third control pipeline, wherein the air supply device is capable of charging and pressurizing the gas storage device.

4. The hot blast stove charge and discharge pressure system of claim 3, wherein the outlet of the first exhaust gas manifold is provided with a first exhaust gas outlet control valve and the outlet of the second exhaust gas manifold is provided with a second exhaust gas outlet control valve.

5. The charging and discharging system of the hot blast stove according to claim 4, wherein the first hot blast pipeline is provided with a first hot blast control valve, the first hot blast control valve is disposed between the first blast furnace and the first hot blast stove, the first cold blast branch pipe is provided with a first cold blast control valve, the first flue gas branch pipe is provided with a first flue gas control valve, and the first waste gas branch pipe is provided with a first waste gas control valve.

6. The hot blast stove pressure charging and discharging system of claim 5, wherein the first hot blast stoves are provided in plurality in parallel, the first hot blast control valve is correspondingly provided between each first hot blast stove and the first blast furnace, and the first charging and discharging pipeline is correspondingly provided between each first hot blast stove and the first main pipeline.

7. A hot blast stove pressure charging and discharging system as claimed in claim 4, wherein a second hot blast control valve is provided on the second hot blast pipe, the second hot blast control valve is provided between the second blast furnace and the second hot blast stove, a second cold blast control valve is provided on the second cold blast branch pipe, a second flue gas control valve is provided on the second flue gas branch pipe, and a second waste gas control valve is provided on the second waste gas branch pipe.

8. The hot blast stove charging and discharging system of claim 7, wherein a plurality of second hot blast stoves are arranged in parallel, the second hot blast control valve is correspondingly arranged between each second hot blast stove and the second blast furnace, and the second charging and discharging pipeline is correspondingly arranged between each second hot blast stove and the second main pipeline.

9. The hot blast stove pressure charging and discharging system of claim 4, wherein the third charging and discharging pipeline comprises a first waste gas collecting pipe and a first gas transmission branch pipe which are arranged in parallel, a first waste gas collecting control valve is arranged on the first waste gas collecting pipe, a first gas transmission control valve is arranged on the first gas transmission branch pipe, the first waste gas collecting pipe is controllably connected with the first waste gas collecting pipe and the inlet of the third control pipeline, and the first gas transmission branch pipe is controllably connected with the first waste gas collecting pipe and the outlet of the third control pipeline.

10. The hot blast stove pressure charging and discharging system of claim 4, wherein the fourth charging and discharging pipeline comprises a second waste gas collecting pipe and a second gas transmission branch pipe which are arranged in parallel, a second waste gas collecting control valve is arranged on the second waste gas collecting pipe, a second gas transmission control valve is arranged on the second gas transmission branch pipe, the second waste gas collecting pipe is controllably connected with the second waste gas collecting pipe and the inlet of the third control pipeline, and the second gas transmission branch pipe is controllably connected with the second waste gas collecting pipe and the outlet of the third control pipeline.

11. The hot blast stove charging and discharging system according to claim 9 or 10, wherein the air supply device, the first cut-off valve, the air storage device, the first regulating valve, and the second cut-off valve are sequentially disposed on the third control pipeline along the air supply direction of the third control pipeline.

12. The hot blast stove pressure charging and discharging system according to claim 11, wherein the third control pipeline is further provided with an air suction pipeline and a blow-off pipeline, the air suction pipeline is provided with an air suction control valve, and the blow-off pipeline is provided with a blow-off control valve.

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