CN215668074U - Hot blast stove system with independent pressurizing device - Google Patents
Hot blast stove system with independent pressurizing device Download PDFInfo
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- CN215668074U CN215668074U CN202121409987.4U CN202121409987U CN215668074U CN 215668074 U CN215668074 U CN 215668074U CN 202121409987 U CN202121409987 U CN 202121409987U CN 215668074 U CN215668074 U CN 215668074U
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Abstract
The embodiment of the utility model provides a hot blast furnace system with an independent pressurizing device, and the blast furnace ironmaking system comprises: the hot blast stove system with the independent pressurizing device comprises a plurality of hot blast stoves and the independent pressurizing device for pressurizing the hot blast stoves; the independent pressurizing device is connected to the hot blast stove through a pipeline and used for pressurizing the inside of the hot blast stove after the burning of the hot blast stove is finished and before air supply; the independent pressurizing device comprises: a pressurizing air source, a pressurizing main pipe (22) and a pressurizing branch pipe (23); one end of the main pressurizing pipe (22) is connected to a pressurizing air source, a main pressurizing pipe (22) is provided with a branch pressurizing pipe (23), and one branch pressurizing pipe (23) is correspondingly connected to one hot blast stove. The utility model improves the operation stability of the hot blast stove and reduces the engineering investment.
Description
Technical Field
The utility model relates to the field of hot blast stoves, in particular to a hot blast stove system with an independent pressurizing device.
Background
The blast furnace hot blast stove is a large heat accumulating type heat exchanger which works periodically. In a working period, coal gas (or other fuels) and air are mixed and combusted, high-temperature flue gas flows downwards from the upper part of a heat storage chamber of the hot blast stove, the heat of the flue gas is absorbed by a heat storage material in the heat storage chamber, and the flue gas is discharged from the bottom of the hot blast stove after being cooled; then stopping heating the heat storage material, introducing cold blast into the hot blast stove from the lower part and upwards passing through the heat storage chamber, absorbing heat from the heat storage material by cold wind and heating the cold wind into hot wind, finally discharging the hot blast stove from the top of the heat storage chamber, and sending the hot wind stove into a blast furnace through a heat-insulating pipeline; when the temperature of the heat storage material is reduced to a certain degree, the hot blast stove is switched to the heating process of the heat storage chamber again. Before cold air is fed into the hot blast stove, the pressure of the cold air is higher than the pressure in the stove, so the hot blast stove needs to be pressurized, and when the pressure in the stove and the pressure of the cold air reach balance, a valve is opened, and the cold air enters a regenerator in the stove.
In the process of implementing the utility model, the applicant finds that at least the following problems exist in the prior art:
at present, the most commonly adopted method for pressurizing the hot blast stove is realized by inputting high-pressure air into the hot blast stove through a blast furnace blower, namely, a pressurizing pipe is led out from a cold air pipe (the cold air pipe inputs cold air to the hot blast stove) to pressurize the hot blast stove. In this case, because the blast furnace blower supplies air to the blast furnace with constant air pressure and air volume, when a hot blast furnace needs to be pressurized, the blast furnace blower needs to divide a small amount of air for pressurization, which inevitably causes the sudden drop of the air pressure of the blast furnace entering the blast furnace. The larger the pressurized air quantity is, the larger the drop range of the blast furnace charging air pressure is. The industrial practice proves that the condition has great influence on the production of the blast furnace, a series of problems such as 'tip falling' and 'hanging' of the blast furnace can be caused, and especially when the condition of the blast furnace is not good, the fluctuation of blast pressure and blast volume has greater influence on the operation of the blast furnace.
In addition, the burning and air supply time of the hot blast stove are important parameters of the design of the hot blast stove, and because the air blower is needed in the pressurizing process of the hot blast stove, a blast furnace operator determines when the hot blast stove is changed in the actual operation, which brings adverse effects to the normal operation of the hot blast stove and is an important factor causing the hot blast stove to be built larger.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a hot blast stove system with an independent pressurizing device, which can improve the operation condition of a blast furnace and improve the operation stability of the hot blast stove, and because the pressurizing operation of the hot blast stove does not need a blower, the furnace changing operation of the hot blast stove can not generate adverse effect on the production of the blast furnace, redundant heat supply redundancy can be eliminated in the design of the hot blast stove, the investment of the hot blast stove is reduced, and on the other hand, the capacity redundancy is not increased because the pressure fluctuation caused by the pressurizing operation is controlled by the blower of the blast furnace.
In order to achieve the above object, an embodiment of the present invention provides a hot blast stove system with an independent pressurizing device, where the hot blast stove system with the independent pressurizing device is used in a blast furnace ironmaking system; the blast furnace ironmaking system comprises: the blast furnace air blower is connected with the blast furnace and supplies air to the blast furnace; the hot blast stove system with the independent pressurizing device comprises a plurality of hot blast stoves and the independent pressurizing device for pressurizing the hot blast stoves;
each hot blast stove is respectively connected with the blast furnace through a pipeline; the hot blast stove is used for heating pressurized cold air to form hot air through burning the stove and supplying air to the formed hot air;
the independent pressurizing device is connected with the hot blast stove through a pipeline and used for pressurizing cold air into the hot blast stove after the hot blast stove finishes burning and before air supply;
the independent pressurizing device comprises: a pressurizing air source, a pressurizing main pipe and a pressurizing branch pipe;
one end of the main pressurizing pipe is connected to a pressurizing air source, a pressurizing branch pipe is arranged on the main pressurizing pipe, and one pressurizing branch pipe is correspondingly connected to one hot blast stove.
Preferably, the pressure of the pressurized air source is higher than the pressure of the cold air conveyed by the blower, and the preferred range of the pressure of the pressurized air source is 1.2-2.5 times of the pressure of the cold air conveyed by the blower.
Preferably, the charging air source comprises an air storage tank and an air compressor for supplementing pressure to the air storage tank, one end of the air storage tank is connected to the air compressor, and the other end of the air storage tank is connected to the charging main pipe.
Preferably, a pressure reducing valve is arranged on the main pressure charging pipe.
Preferably, each charging branch pipe is provided with a charging valve.
Preferably, the hot blast stove further comprises the same number of pressure discharge pipes (also used as diffusing pipes) as the hot blast stoves, and one pressure discharge pipe is correspondingly connected to one hot blast stove; the pressure discharge pipe is used for discharging the pressure of the hot blast stove after the air supply of the hot blast stove is finished and before the hot blast stove is burned again.
Preferably, each pressure discharge pipe is provided with a pressure discharge valve.
Preferably, the method further comprises the following steps: the flue gas main pipe is provided with flue gas branch pipes which are correspondingly connected with the hot blast stove; the pressure relief pipe is arranged on the flue gas branch pipe, and the inner diameter of the pressure relief pipe is smaller than that of the flue gas branch pipe.
Preferably, the working cycle process of each hot blast stove is as follows: burning, stewing furnace I, air supply, stewing furnace II and burning furnace; the stewing furnace I is used for pressurizing the hot blast furnace by utilizing the independent pressurizing device before air supply and after the burning is finished; the braising furnace II is used for carrying out pressure discharge operation on the hot blast furnace before the hot blast furnace is used for burning again after air supply of the hot blast furnace is finished;
and each hot blast stove performs periodic work circulation according to a preset working system, so that after the current hot blast stove finishes air supply, other hot blast stoves continue to convey hot air, and the hot blast stove system with the independent pressurizing device can continuously convey hot air to the blast furnace.
Preferably, the types of hot blast stove include: top-fired, external-fired, internal-fired hot blast stoves for blast furnace ironmaking or other equipment using high-pressure high-blast-temperature blast, i.e.: other similar applications, such as high pressure blast furnaces.
The technical scheme has the following beneficial effects: the air blower which provides cold air for the hot blast stove during air supply is not provided with a pressurizing function any more through the independent pressurizing device, air blowing and pressurizing are realized by adopting different devices, the functions of the air blowing and the pressurizing are separated, and the operation stability of the hot blast stove is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a hot blast stove system with an independent pressurizing device according to an embodiment of the utility model;
FIG. 2 is a schematic diagram of the operational timing sequence of the hot blast stove cluster of the present invention compared to the operational timing sequence of the hot blast stove cluster of the prior art.
The reference numerals are represented as:
21. a gas storage tank; 22. a main pressurizing pipe; 23. pressurizing the branch pipe; 24. an air compressor; 27. a pressure charging valve; 28. a flue gas main pipe; 30. a pressure discharge pipe; 31. a pressure relief valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, in combination with an embodiment of the present invention, there is provided a hot blast stove system with an independent charging device for a blast furnace ironmaking system; the blast furnace ironmaking system comprises: the blast furnace air blower is connected with the blast furnace and supplies air to the blast furnace. Other parts required by the blast furnace ironmaking system are common components in the prior art. The hot blast stove system with the independent pressurizing device comprises a plurality of hot blast stoves and the independent pressurizing device for pressurizing the hot blast stoves.
The hot blast stove group composed of 4 hot blast stoves shown in fig. 1 is numbered from left to right as No. 1, No. 2, No. 3 and No. 4: when the No. 1 hot blast stove needs to be pressurized, the pressurizing valve 27 on the pressurizing branch pipe 23 leading to the No. 1 hot blast stove is opened, and the air storage tank 21 starts to pressurize the No. 1 hot blast stove. And after the No. 1 hot blast stove is pressurized, the pressurizing valve 27 is closed.
The pressurizing process of the hot blast stoves No. 2, No. 3 and No. 4 is the same as the operation.
Each hot blast stove is respectively connected with the blast furnace through a pipeline; the hot blast stove is used for heating pressurized cold air to form hot air through burning the stove, and supplying air to the formed hot air, namely an air supply period; when the hot blast stove supplies air, cold air is blown into the hot blast stove through the air blower, and the hot blast stove heats the cold air blown into the hot blast stove to obtain hot air with preset temperature. And after the furnace is burnt, the formed hot air is conveyed outwards for air supply.
The independent pressurizing device is connected with the hot blast stove through a pipeline and used for pressurizing cold air into the hot blast stove after the stove burning is finished and before air supply (namely, after the stove burning is finished and before the air supply is finished); when the hot blast stove heats cold air to obtain hot air with preset temperature, the hot air is conveyed to the inside of the blast furnace or other smelting devices needing high-pressure hot air. Before the air supply (hot air supply) of the hot blast stove, the hot blast stove is pressurized through an independent pressurizing device, and the cold air valve and the hot blast valve can be opened until the pressure in the hot blast stove and the blast pressure (0.25-0.5 Mpa or higher) of a cold air pipe conveying cold air into the hot blast stove are consistent, so that the cold air is introduced into the stove and heated to form hot air and then conveyed outwards. The blast furnace blower does not provide pressurized air for the hot blast furnace any more when the hot blast furnace is pressurized through the independent pressurizing device, the blast air and the pressurizing are realized by adopting different equipment, and the functions of the blast air and the pressurizing are separated.
The independent pressurizing device comprises: a pressurizing air source, a pressurizing main pipe 22 and a pressurizing branch pipe 23; one end of the main pressurizing pipe 22 is connected to a pressurizing air source, a group of valves (not shown in the drawing) are arranged on the main pressurizing pipe 22, the main pressurizing pipe 22 is connected with a plurality of branch pressurizing pipes 23, and one branch pressurizing pipe 23 is correspondingly connected to one hot blast stove. When the hot blast stove is pressurized, gas with certain pressure, generally air, is output through a pressurizing gas source, the high-pressure gas enters a pressurizing main pipe 22, enters a pressurizing branch pipe 23 corresponding to the hot blast stove needing pressurizing after the pressure is regulated by a valve arranged on the pressurizing main pipe 22, and finally enters the hot blast stove; until the pressure in the hot blast stove is consistent with the blast pressure (0.25-0.5 Mpa or higher) of a cold blast pipe for conveying cold blast into the hot blast stove.
Preferably, the charging air source includes an air tank 21 and an air compressor 24 (providing a high-pressure air source, which may be an air compressor F1) for supplying pressure to the air tank 21, one end of the air tank 21 is connected to the air compressor 24, and the other end of the air tank 21 is connected to the charging main pipe 22. Before the hot blast stove needs to be pressurized, the air compressor 24 blows compressed air into the air storage tank 21, so that the compressed air in the air storage tank 21 keeps a certain pressure; when a certain hot blast stove needs to be pressurized, high-pressure gas (generally air) in the gas storage tank enters the main pressurizing pipe 22, and after the pressure of the high-pressure gas is adjusted by a valve arranged on the main pressurizing pipe 22, the high-pressure gas enters the corresponding branch pressurizing pipe 23 of the hot blast stove needing to be pressurized, and finally enters the hot blast stove. Because the pressure-regulating device is provided with the independent high-pressure air source, the pressure can be pressurized at certain pressure and higher flow rate through pressure regulation, the pressure-regulating efficiency is improved, and the pressure-regulating time can be greatly shortened.
The blast furnace blower for providing cold air to the hot blast furnace in the prior art is enabled not to provide a pressurizing function any more through the independent pressurizing device, the air blowing and the pressurizing are realized by adopting different equipment, and the functions of the air blowing and the pressurizing are separated. The hot blast stove group changing stove does not need the blast stove blower to supply air additionally, so the blast stove blower can always provide cold air with stable flow and pressure (does not need to provide air for the hot blast stove which is being pressurized), each hot blast stove does not need to keep longer air supply time, and hot air with higher temperature can be still kept under the condition of reducing heat storage area.
Preferably, the main charging pipe 22 is provided with a pressure reducing valve. In the actual pressurizing process, the pressure is reduced by a pressure reducing valve, and the hot blast stove is pressurized under a lower pressure difference, so that the lining of the hot blast stove is not damaged, and a larger pressurizing flow can be kept.
Preferably, a charging valve 27 is provided on each charging branch 23. When a certain hot blast stove needs to be pressurized, the pressurizing valve 27 on the pressurizing branch pipe 23 connected with the hot blast stove needs to be opened, so that the pressurizing branch pipe 23 is in a communicated state, and compressed air in the pressurizing main pipe 22 can flow through the pressurizing branch pipe 23 to enter the hot blast stove after being subjected to pressure regulation, so that the hot blast stove is pressurized. Compared with the conventional blast furnace blower pressurizing operation, the embodiment uses the compressed air after pressure regulation, namely pressure reduction during pressurizing, can protect the heat-resistant material in the hot blast furnace, and simultaneously uses larger flow to convey the compressed air to the hot blast furnace, thereby greatly shortening the pressurizing time.
Preferably, the system further comprises the same number of pressure discharge pipes 30 (also used as diffusing pipes) as the number of the hot blast stoves, and one pressure discharge pipe 30 is correspondingly connected to one hot blast stove; the pressure discharge pipe 30 is used for discharging the pressure of the hot blast stove after the hot blast stove is completely conveyed outwards (after air supply is completed) and before the hot blast stove is burned again. When a certain hot blast stove discharges pressure, the pressure discharge valve 31 on the pressure discharge pipe 30 connected with the hot blast stove is opened, and the pressure discharge pipe 30 is in a passage state. Since the pressure in the hot blast stove is higher than the atmospheric pressure, the exhaust gas in the hot blast stove naturally flows to the pressure discharge pipe 30 having a low pressure until the pressure in the hot blast stove is equivalent to the atmospheric pressure.
Preferably, the method further comprises the following steps: the flue gas main pipe 28 is provided with flue gas branch pipes, and the flue gas branch pipes are correspondingly connected with the hot blast stove; the pressure discharge pipe 30 is arranged on the flue gas branch pipe, and the inner diameter of the pressure discharge pipe 30 is smaller than that of the flue gas branch pipe. The pressure discharge pipe 30 is arranged on a flue gas branch pipe of the hot blast stove, and can directly discharge the discharged waste gas into the flue gas branch pipe and then into the flue gas main pipe 28 until the pressure in the hot blast stove is balanced with the pressure of the flue gas main pipe 28. The pressure discharge pipe 30 is arranged on the flue gas branch pipe, so that the overlong pressure discharge pipe 30 is avoided, and materials are saved; more importantly, the mode of the waste gas treatment is simple. The working cycle process of each hot blast stove is as follows: burning, stewing furnace I, air supply, stewing furnace II and burning furnace; the so-called 'smoldering' operation is that the hot blast stove needs to be pressurized and depressurized and related valves are opened and closed before the operation mode is switched, and the hot blast stove does not burn and supply air in the 'smoldering' stage. The stewing furnace I is characterized in that before the burning and air supply are finished, the smoke generated after air gas is burnt in the hot blast furnace is in a normal pressure state (during the burning period, the smoke is connected to a heat exchanger through a flue and then discharged into a chimney), the air supply operation is performed under high pressure (blast pressure), so that the hot blast furnace needs to be pressurized by utilizing the independent pressurizing device, and the cold air valve (because the pressure in the front and rear pipes is balanced) and the hot air valve (because the pressure in the front and rear pipes is balanced) can not be opened until the pressure in the hot blast furnace and the blast pressure of the cold air pipe (0.25-0.5 Mpa or higher) are consistent, and the hot blast furnace is switched to the air supply operation. However, in the prior art: only the blast furnace blower blowing cold air into the hot blast furnace is used, although the periodic fluctuation of the air pressure of the blast furnace is reduced by slow pressurization or a mode of 'constant air pressure pressurization during furnace change and constant air volume operation after the furnace change' is adopted, the investment and the operation cost of the blast furnace blower are increased, the pressurization time is prolonged, and the time for burning the hot blast furnace is shortened.
On the other hand, the hot blast stove needs to be periodically switched according to a certain working system, in the prior art, just because a blast furnace blower cannot be started in the hot blast stove changing operation, the changing time is actually determined by the blast furnace operation, such as the tapping time of the blast furnace and the like, so that the air supply time of the hot blast stove cannot be too short, and the air supply time of the hot blast stove is prolonged to be unfavorable for keeping high air temperature, so that the hot blast stove is required to have enough heat storage capacity, and the hot blast stove has to be built to be larger, so that the process investment of the hot blast stove is increased.
The stewing furnace II is used for carrying out pressure discharge operation on the hot blast furnace after the hot blast furnace is conveyed outwards and before the hot blast furnace is burned again; the hot blast stove is changed from 'blowing' operation to 'burning' operation, and then enters into 'braising II' stage, and the inside of the hot blast stove is in a high pressure state of blast pressure. Because the furnace burning operation is carried out under normal pressure, the pressure discharge operation is required to be completed in the stewing furnace II stage; namely, the waste air in the hot blast stove is discharged to the flue main pipe through the pressure discharge pipe 30 until the pressure in the hot blast stove is balanced with the pressure in the discharge flue.
And each hot blast stove performs periodic work circulation according to a preset working system, so that after the current hot blast stove finishes air supply, other hot blast stoves continue to convey hot air, and the hot blast stove system with the independent pressurizing device can continuously convey hot air outwards. The hot blast stove group in the embodiment is provided with the independent pressurizing device, wherein the normal operation of a blast furnace blower is not influenced by the stove changing operation of each hot blast stove, so that the hot blast stove group can be ensured to uninterruptedly convey hot blast to the blast furnace, the fluctuation of the wind pressure of the hot blast can be controlled at a smaller level, and the working mode is favorable for the stable production of the blast furnace.
As shown in FIG. 2, the time sequence diagram of the hot blast stove with short charging time is compared with the operation time sequence diagram of the conventional hot blast stove group, and the charging time is obviously shortened and the burning time is prolonged after the hot blast stove is adopted.
Preferably, the hot blast stove can also adopt shorter air supply time, such as air supply time shortened by 20-90%, so as to improve the temperature of blast air;
preferably, the heat storage area of the hot blast stove can be reduced under the same air temperature requirement, for example, the heat storage area is reduced by 20-90%, and meanwhile, the shorter air supply time matched with the heat storage area is adopted, so that the air temperature requirement of air supply can be met by using the utility model.
Preferably, the types of hot blast stove include: the hot blast stove is used for blast furnace ironmaking or other equipment in the industrial field needing high-pressure high-air-temperature blast.
In conclusion, the utility model has the technical effects that:
1. the utility model thoroughly eliminates the influence of the charging pressure of the hot blast stove on the blast pressure and the flow of the blast furnace in the prior art, thereby enabling the hot blast stove to operate under an independent working system, and the air supply time is not limited by the production of the blast furnace, thereby improving the operation stability of the hot blast stove and reducing the operation energy consumption of the hot blast stove.
2. In the utility model, the hot blast stove can provide blast (hot blast) with higher blast temperature without increasing the heat storage area without keeping longer blast time. The hot blast stove can keep high wind temperature blast air under the condition of smaller heat storage area and shorten air supply time, thereby reducing the process investment of the hot blast stove.
3. The utility model also has a plurality of comprehensive functions, including establishing a full-automatic operation mechanism of the hot blast stove group by utilizing the utility model, reducing comprehensive energy consumption and having wider popularization value.
4. The investment of blast furnace blower is reduced, the production condition of the blast furnace is improved, and the furnace changing operation of the hot blast furnace does not have adverse effect on the production of the blast furnace.
5. Greatly reducing the pressurizing time. The pressure of the pressurized cold air provided by the blast furnace blower is certain, so that only small-flow pressurization can be adopted to protect the lining of the blast furnace, and the independent pressurization device can pressurize at lower pressure difference and higher flow, so that the pressurization time can be greatly shortened. The reduction of the pressurizing time is also to shorten the furnace changing time from the burning period to the air supply period of the hot blast furnace, thereby being beneficial to prolonging the burning time and improving the air temperature.
6. The design of the hot blast stove does not need to consider parameters such as air supply time and the like, so that the process investment of the hot blast stove is reduced, for example, high-air-temperature air supply can be realized by adjusting the air supply time, and the heat supply redundancy of the hot blast stove can be greatly reduced.
7. The hot blast stove system with the independent pressurizing device can realize the specified air temperature blast by shortening the air supply time which is usually determined at the beginning of the design of the hot blast stove, so that the air temperature requirement of blast furnace blast can be met by only 2-3 hot blast stoves, and the process investment of the hot blast stove is greatly reduced.
It should be understood that the specific order or hierarchy of steps in the processes disclosed is an example of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged without departing from the scope of the present disclosure. The accompanying method claims present elements of the various steps in a sample order, and are not intended to be limited to the specific order or hierarchy presented.
In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the utility model.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. To those skilled in the art; various modifications to these embodiments will be readily apparent, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A hot blast stove system with an independent pressurizing device is characterized in that the hot blast stove system with the independent pressurizing device is used for a blast furnace ironmaking system; the blast furnace ironmaking system comprises: the blast furnace system with the independent pressurizing device comprises a plurality of hot blast furnaces and the independent pressurizing device for pressurizing the hot blast furnaces;
each hot blast stove is respectively connected with the blast furnace through a pipeline; the hot blast stove is used for heating pressurized cold air to form hot air through burning the stove and supplying air to the formed hot air;
the independent pressurizing device is connected with the hot blast stove through a pipeline and used for pressurizing cold air into the hot blast stove after the stove burning is finished and before air supply;
the independent pressurizing device comprises: a pressurizing air source, a pressurizing main pipe (22) and a pressurizing branch pipe (23);
one end of the main pressurizing pipe (22) is connected to a pressurizing air source, a main pressurizing pipe (22) is provided with a branch pressurizing pipe (23), and one branch pressurizing pipe (23) is correspondingly connected to one hot blast stove.
2. The hot blast stove system with independent pressurizing device according to claim 1, wherein the pressurizing air source comprises an air storage tank (21) and an air compressor (24) for pressurizing the air storage tank (21), one end of the air storage tank (21) is connected to the air compressor (24), and the other end of the air storage tank (21) is connected to the main pressurizing pipe (22).
3. The hot blast stove system with independent pressurizing device according to claim 1, wherein each pressurizing branch pipe (23) is provided with a pressurizing valve (27).
4. A hot blast stove system with independent pressurising means according to claim 3 characterised in that the main pressurising pipe (22) is provided with a pressure relief valve.
5. The hot blast stove system with the independent pressurizing device according to claim 1, further comprising a number of pressure-discharging pipes (30) equal to the number of the hot blast stoves, wherein one pressure-discharging pipe (30) is correspondingly connected to one hot blast stove; the pressure discharge pipe (30) is used for discharging pressure of the hot blast stove before the hot blast stove is burnt again after air supply of the hot blast stove is completed.
6. A hot blast stove system with independent pressurising means according to claim 5 characterised in that a pressure relief valve (31) is provided on each of the pressure relief pipes (30).
7. The hot blast stove system with independent pressurizing device according to claim 5, wherein the work cycle process of each hot blast stove is as follows: burning, stewing furnace I, air supply, stewing furnace II and burning furnace; the stewing furnace I is used for pressurizing the hot blast furnace by utilizing the independent pressurizing device before air supply and after the burning is finished; the braising furnace II is used for carrying out pressure discharge operation on the hot blast furnace before the air supply in the hot blast furnace is finished and the hot blast furnace is burned again;
and each hot blast stove performs periodic work circulation according to a preset working system, so that after the current hot blast stove finishes air supply, other hot blast stoves continue to convey hot air, and the hot blast stove system with the independent pressurizing device can continuously convey hot air outwards.
8. The hot blast stove system with independent charging device according to claim 1, wherein the types of the hot blast stove include: top-fired hot blast stoves, external-fired hot blast stoves, internal-fired hot blast stoves for blast furnace ironmaking or for apparatus using high pressure high blast temperature blast.
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| CN202121409987.4U CN215668074U (en) | 2021-06-24 | 2021-06-24 | Hot blast stove system with independent pressurizing device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114959146A (en) * | 2022-07-13 | 2022-08-30 | 中冶京诚工程技术有限公司 | Hot-blast stove charging and discharging system and control method thereof |
| CN115029493A (en) * | 2022-06-29 | 2022-09-09 | 马钢集团设计研究院有限责任公司 | Blast furnace hot blast stove air temperature lifting method |
| CN115094178A (en) * | 2022-07-13 | 2022-09-23 | 中冶京诚工程技术有限公司 | Hot blast stove pressurizing mechanism, cooperative stove changing system and pressure stabilizing stove changing method |
| CN115109884A (en) * | 2022-07-13 | 2022-09-27 | 中冶京诚工程技术有限公司 | Hot blast stove changing system and method |
| CN115786617A (en) * | 2022-11-15 | 2023-03-14 | 中钢设备有限公司 | Quick undisturbed stove device that trades |
| CN117344069A (en) * | 2023-10-07 | 2024-01-05 | 鞍钢股份有限公司 | Blast furnace gas pressure stabilizing system and method for free-standing hot blast furnace in furnace changing period |
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2021
- 2021-06-24 CN CN202121409987.4U patent/CN215668074U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115029493A (en) * | 2022-06-29 | 2022-09-09 | 马钢集团设计研究院有限责任公司 | Blast furnace hot blast stove air temperature lifting method |
| CN114959146A (en) * | 2022-07-13 | 2022-08-30 | 中冶京诚工程技术有限公司 | Hot-blast stove charging and discharging system and control method thereof |
| CN115094178A (en) * | 2022-07-13 | 2022-09-23 | 中冶京诚工程技术有限公司 | Hot blast stove pressurizing mechanism, cooperative stove changing system and pressure stabilizing stove changing method |
| CN115109884A (en) * | 2022-07-13 | 2022-09-27 | 中冶京诚工程技术有限公司 | Hot blast stove changing system and method |
| CN114959146B (en) * | 2022-07-13 | 2023-11-10 | 中冶京诚工程技术有限公司 | Hot-blast stove pressure charging and discharging system and control method thereof |
| CN115094178B (en) * | 2022-07-13 | 2024-02-09 | 中冶京诚工程技术有限公司 | Hot blast stove pressurizing mechanism, collaborative furnace changing system and pressure stabilizing furnace changing method |
| CN115786617A (en) * | 2022-11-15 | 2023-03-14 | 中钢设备有限公司 | Quick undisturbed stove device that trades |
| CN115786617B (en) * | 2022-11-15 | 2024-02-23 | 中钢设备有限公司 | Quick undisturbed furnace replacing device |
| CN117344069A (en) * | 2023-10-07 | 2024-01-05 | 鞍钢股份有限公司 | Blast furnace gas pressure stabilizing system and method for free-standing hot blast furnace in furnace changing period |
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