CN217377925U - Blast furnace top charging bucket pressure-equalizing bleeding system and blast furnace charging system - Google Patents
Blast furnace top charging bucket pressure-equalizing bleeding system and blast furnace charging system Download PDFInfo
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- CN217377925U CN217377925U CN202220711831.XU CN202220711831U CN217377925U CN 217377925 U CN217377925 U CN 217377925U CN 202220711831 U CN202220711831 U CN 202220711831U CN 217377925 U CN217377925 U CN 217377925U
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Abstract
The utility model relates to a blast furnace top material jar voltage-sharing system of bleeding, include the voltage-sharing pipeline and the voltage-sharing gas recovery pipeline of being connected with the furnace top material jar, the recovery pipeline that all pressurizes is connected with voltage-sharing gas and stores up the cabinet, all pressurize store up be equipped with on the cabinet pressure-sharing gas retrieval and utilization pipe and in all pressurize and be equipped with the retrieval and utilization control valve on the retrieval and utilization pipe, the retrieval and utilization pipe and the blast furnace coal injection tube coupling of all pressurizing. In addition, the blast furnace charging system is provided with the blast furnace top charging bucket pressure equalizing and bleeding system. The utility model discloses in, as the carrier gas of blast furnace jetting buggy with the voltage-sharing gas, realize all compressing air's resource utilization on the one hand, reducible coal injection carrier gas's quantity, on the other hand, the coal gas in all compressing air can return to the blast furnace as fuel simultaneously, and energy saving and emission reduction effect is better, and in addition, the voltage-sharing gas has relatively higher temperature, can play the effect of preheating the buggy, improves buggy combustion effect to a certain extent.
Description
Technical Field
The utility model belongs to the technical field of blast furnace production, concretely relates to blast furnace top material jar voltage-sharing system of bleeding and dispose this blast furnace top material jar voltage-sharing system of bleeding's blast furnace charging system.
Background
Coke, sinter, slag making material and the like are added into a blast furnace through a furnace top charging bucket in blast furnace iron making production, pressure equalizing is needed in charging of the charging bucket because the pressure of the top of the blast furnace is 2-3bar, normally, the pressurized coal gas is directly discharged into the atmosphere after passing through a cyclone dust collector and a silencer, the part of the coal gas contains toxic and combustible substances such as dust, CO and the like, and the average emission of crude gas per ton of iron is about 7-9Nm 3 The dust emission amount is about 280-400g/tFe, so the gas amount discharged by the blast furnace pressure equalizing diffusion is not a little, and the diffused gas not only wastes energy but also pollutes the atmosphere. On one hand, the pressure difference between the recovered coal gas and the pressure-equalizing coal gas is large, so that the pressure of a pressure-equalizing coal gas pipe network is fluctuated, and the production stability of the system is influenced; on the other hand, to fully recover the coal gas in the charging bucket, an ejector is required to be arranged, based on the aerodynamic principle of the ejector, the residual coal gas in the charging bucket is sucked by forming a negative pressure effect through high-pressure gas jet, the equipment cost and the operation cost are high, the dust concentration in the injected gas is too high, and excessive injection easily causes air to enter the charging bucket and causes potential safety hazards.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a blast furnace top material tank pressure-equalizing bleeding system and a blast furnace charging system provided with the same, which can at least solve the partial defects of the prior art.
The utility model relates to a blast furnace top material jar voltage-sharing system of bleeding, include the voltage-sharing pipeline and the voltage-sharing gas recovery pipeline of being connected with the furnace top material jar, the recovery pipeline that all pressurizes is connected with voltage-sharing gas and stores up the cabinet, all pressurize store up be equipped with on the cabinet pressure-sharing gas retrieval and utilization pipe and in all pressurize and be equipped with the retrieval and utilization control valve on the retrieval and utilization pipe, the retrieval and utilization pipe and the blast furnace coal injection tube coupling of all pressurizing.
In one embodiment, the blast furnace coal injection pipeline includes an injection tank, a coal injection pipe connected to the injection tank, and a gas carrying pipe connected to the coal injection pipe, and the uniform pressure gas recycling pipe is connected to the gas carrying pipe or the coal injection pipe.
As one embodiment, an ejector is arranged on the gas carrying pipe, and the uniform pressure gas recycling pipe is connected with the ejector.
As one of the implementation modes, the blast furnace top charging bucket pressure-equalizing and bleeding system further comprises a purging pipe connected to the furnace top charging bucket, the purging pipe is connected with a purging air source, and a purging control valve is arranged on the purging pipe.
As one embodiment, the pressure equalizing pipeline comprises a gas pressure equalizing pipe and a nitrogen pressure equalizing pipe, the gas pressure equalizing pipe and the nitrogen pressure equalizing pipe are both communicated with the cavity of the furnace top charging bucket, a primary pressure equalizing valve is arranged on the gas pressure equalizing pipe, and a secondary pressure equalizing valve is arranged on the nitrogen pressure equalizing pipe.
In one embodiment, the purge tube is connected to the nitrogen pressure equalizer tube.
As one embodiment, an exhaust bypass is arranged on the pressure equalizing gas recovery pipeline, a fan and an exhaust control valve are arranged on the exhaust bypass, a recovery control valve is arranged on the pressure equalizing gas recovery pipeline, and two ends of the exhaust bypass are located on two sides of the recovery control valve.
In one embodiment, the pressure equalizing gas recovery line is provided with a dust removal purification mechanism.
The utility model discloses still relate to a blast furnace charging system, including the furnace top material jar, the furnace top material jar configuration has as above the blast furnace top material jar voltage-sharing system of diffusing.
The utility model discloses following beneficial effect has at least:
the utility model discloses in, be used as the carrier gas of blast furnace jetting buggy with the voltage-sharing gas, realize the utilization of the equal compressed air of on the one hand, the quantity of reducible coal injection carrier gas, on the other hand, the coal gas in the equal compressed air can return to the blast furnace as fuel simultaneously, and energy saving and emission reduction effect is better, and in addition, the voltage-sharing gas has relatively higher temperature, can play the effect of preheating the buggy, improves buggy combustion effect to a certain extent.
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 view of a charging system of a blast furnace according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another blast furnace charging system provided by the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below clearly and completely, and it should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example one
Like fig. 1 and fig. 2, the embodiment of the utility model provides a blast furnace top material jar voltage-sharing system of bleeding, include the voltage-sharing pipeline and the voltage-sharing gas recovery pipeline 24 of being connected with the furnace top material jar 11, the equal pressure gas recovery pipeline 24 is connected with voltage-sharing gas storage cabinet 31, be equipped with voltage-sharing gas retrieval and utilization pipe 32 on the voltage-sharing gas storage cabinet 31 and in be equipped with the retrieval and utilization control valve on the equal pressure gas retrieval and utilization pipe 32, equal pressure gas retrieval and utilization pipe 32 and blast furnace coal injection tube coupling.
In one embodiment, a charging bucket air vent is formed in the charging bucket 11 at the top of the furnace, the pressure equalizing pipeline and the pressure equalizing gas recovery pipeline 24 share the charging bucket air vent, and part of pipe sections of the pressure equalizing pipeline and the pressure equalizing gas recovery pipeline 24 are overlapped. For example, as shown in fig. 1 and fig. 2, the charging bucket air vent of the furnace top charging bucket 11 is connected with a pressure equalizing blow-off pipe 26, and a pressure equalizing pipeline and a pressure equalizing gas recycling pipeline 24 are respectively connected with the pressure equalizing blow-off pipe 26; a coarse dust removal unit 28 can be arranged on the pressure equalizing and diffusing pipe 26, pressure equalizing gas leading to the furnace top charging bucket 11 and recycling pressure equalizing gas leading to the pressure equalizing gas storage cabinet 31 can be used for removing dust through the coarse dust removal unit 28, and the coarse dust removal unit 28 can adopt coarse dust removal equipment such as a cyclone dust remover and the like.
In one embodiment, the pressure equalizing operation of the top charging bucket 11 comprises a primary gas pressure equalizing step and a secondary nitrogen pressure equalizing step; correspondingly, as shown in fig. 1, the pressure equalizing pipeline comprises a gas pressure equalizing pipe 21 and a nitrogen pressure equalizing pipe 22, the gas pressure equalizing pipe 21 is connected with a clean gas pipeline 211, the nitrogen pressure equalizing pipe 22 is connected with a pressure equalizing nitrogen source 222, a primary pressure equalizing valve is arranged on the gas pressure equalizing pipe 21, and a secondary pressure equalizing valve is arranged on the nitrogen pressure equalizing pipe 22; optionally, the nitrogen pressure equalizer 22 is connected next to the gas pressure equalizer 21.
Further, as shown in fig. 1, a purging pipe 23 is further connected to the furnace top charging bucket 11, the purging pipe 23 is connected to a purging gas source, and a purging control valve is arranged on the purging pipe 23. The purge gas source is preferably an inert gas source including, but not limited to, nitrogen or argon, and in this embodiment nitrogen is used as the purge gas, which may be taken from the same pressure equalization nitrogen source 222 as the secondary pressure equalization nitrogen, for example, by the purge line 23 connected to the nitrogen pressure equalization tube 22. Furthermore, the blowing pipe 23 is connected to the bottom of the furnace top charging bucket 11, so that a good blowing and gas removing effect can be achieved.
In another embodiment, the pressure equalizing operation of the top charging bucket 11 adopts a full clean gas pressure equalizing mode. Correspondingly, as shown in fig. 2, the pressure equalizing pipeline comprises a gas pressure equalizing pipe 21, the gas pressure equalizing pipe 21 is connected with a clean gas pipeline 211, and a primary pressure equalizing valve is arranged on the gas pressure equalizing pipe 21; a pressurizing device or a net gas pipe 211 for supplying pressurized gas can be arranged on the gas pressure equalizing pipe 21. In this aspect, preferably, the operation of recovering the equalized pressure gas includes:
introducing a part of clean gas in the furnace top charging bucket 11 into a first storage cabinet 311;
then, the remaining clean gas in the furnace top charging bucket 11 is swept and driven into the second storage cabinet 312 by utilizing the sweep gas, and the sweep gas is inert gas harmless to blast furnace smelting; gas is taken from the second bin 312 to be used as a carrier gas for the pulverized coal injection of the blast furnace.
As shown in fig. 2, the pressure equalizing gas storage 31 includes a first storage 311 and a second storage 312; equal pressure gas recovery pipeline 24 includes the first branch pipe of retrieving that is connected with first storage cabinet 311 and the second of storing up the cabinet 312 and being connected with the second and retrieves the branch pipe, this equal pressure gas recovery pipeline 24 can further include retrieving the main pipe, first branch pipe of retrieving and the second is retrieved the branch pipe and is all connected with this recovery main pipe, retrieve the main pipe, set up the control valve respectively on first branch pipe of retrieving and the second retrieves the branch pipe or set up three way control valve etc. at the exit end of retrieving the main pipe, can control the flow direction of equal pressure gas can. It will be appreciated that pressure equalization gas return 32 is disposed in second reservoir 312.
Further, the clean gas stored in the first storage 311 can be recycled as the pressure equalizing gas, and accordingly, the first storage 311 is connected to a pressure equalizing gas circulating pipe connected to the pressure equalizing pipeline or connected to the clean gas pipeline 211.
Further, as shown in fig. 1 and fig. 2, a dust removal purification mechanism is arranged on the pressure equalizing gas recovery pipeline 24. The dust removal purification mechanism can adopt the combination of a coarse dust removal unit 28 and a fine dust removal unit 29; in the structure in which the pressure equalizing and bleeding pipe 26 is provided with the coarse dust removal unit 28, the pressure equalizing gas recovery pipe 24 may be provided with the fine dust removal unit 29, and the fine dust removal unit 29 may be a dust removal device such as a bag-type dust remover. In the above-described structure in which the pressure equalizing gas recovery pipeline 24 includes the recovery trunk, the first recovery branch pipe, and the second recovery branch pipe, the dust-removal purification mechanism may be arranged on the recovery trunk.
Further, in the process of purging and driving the gas, the fan 251 is adopted to assist the residual pressure-equalizing gas to enter the pressure-equalizing gas storage cabinet 31, so that the pressure-equalizing gas recovery efficiency can be improved. Correspondingly, as shown in fig. 1 and fig. 2, an exhaust bypass 25 is arranged on the equalized air recovery pipeline 24, a fan 251 and an exhaust control valve are arranged on the exhaust bypass 25, a recovery control valve is arranged on the equalized air recovery pipeline 24, and two ends of the exhaust bypass 25 are located at two sides of the recovery control valve; through retrieving control valve and exhaust control valve, can control whether fan 251 puts into operation, can only make fan 251 put into operation in the gas process of driving out of blowing, also can use fan 251 in the pressure-equalizing gas self-current in-process in order to accelerate pressure-equalizing gas recovery efficiency.
In one embodiment, the coal injection pipeline includes an injection tank, a coal injection pipe connected to the injection tank, and a main carrier gas pipeline 4 connected to the coal injection pipe, and the uniform pressure gas recycling pipe 32 is connected to the main carrier gas pipeline 4 or connected to the coal injection pipe. Preferably, as shown in fig. 1 and 2, an ejector 42 is arranged on the main carrier gas pipeline 4, and the equalized pressure gas recycling pipe 32 is connected with the ejector 42, so that the equalized pressure gas can be recycled without additional power.
As shown in fig. 1 and 2, after the pressure equalizing gas in the top bucket 11 is driven by the purge gas, the excess purge gas in the top bucket 11 may be evacuated to make the top bucket 11 in a pressureless state, and the next charging process may be performed, that is, an evacuation pipe 27 is connected to the top bucket 11, and a silencer 271 may be provided on the evacuation pipe 27.
The embodiment also relates to an operation method of the blast furnace top charging bucket pressure equalizing and bleeding system, which comprises the following steps:
after the pressure equalization of the furnace top charging bucket 11 is finished and the charging is finished, the equalized pressure gas is recovered;
the recovered pressure equalizing gas is at least partially used as a carrier gas for the pulverized coal injected into the blast furnace.
In one embodiment, as shown in fig. 1, the pressure equalizing operation of the top charging bucket 11 comprises a primary gas pressure equalizing step and a secondary nitrogen pressure equalizing step, and the pressure equalizing gas is recovered and stored in a pressure equalizing gas storage cabinet 31; and taking gas from the pressure equalizing gas storage cabinet 31 to be used as a carrier gas for injecting the pulverized coal into the blast furnace.
Preferably, a clean gas pipeline 211 is adopted to supply primary pressure-equalizing gas to the top charging bucket 11, and when the pressure in the top charging bucket 11 is equal to the pressure in the clean gas pipeline 211, the supply of the primary pressure-equalizing gas is stopped; and filling secondary pressure-equalizing nitrogen into the furnace top charging bucket 11 until the pressure in the furnace top charging bucket 11 is equal to the pressure of the top of the blast furnace, and stopping supplying the secondary pressure-equalizing nitrogen, thereby finishing the pressure-equalizing operation of the furnace top charging bucket 11. At the moment, the bottom charging valve of the furnace top charging bucket 11 is opened, and the materials can be charged into the blast furnace 1; after the charging is finished, the bottom charging valve is closed, the furnace top charging bucket 11 is filled with the pressure equalizing gas, the pressure in the furnace top charging bucket is equivalent to that of the blast furnace, and the furnace top charging bucket 11 can receive new furnace materials after the pressure equalizing gas is discharged.
As an embodiment, the operation of recovering the equalized pressure gas includes: firstly, pressure difference between the furnace top charging bucket 11 and the pressure equalizing gas storage cabinet 31 is utilized to enable the pressure equalizing gas to automatically flow into the pressure equalizing gas storage cabinet 31 from the furnace top charging bucket 11; and then, the residual uniform pressure gas in the furnace top charging bucket 11 is swept and driven into the uniform pressure gas storage cabinet 31 by utilizing sweep gas, wherein the sweep gas is inert gas harmless to blast furnace smelting. In this embodiment, nitrogen is used as the purge gas, which may be taken from the same pressure-equalizing nitrogen source 222 as the secondary pressure-equalizing nitrogen; in addition, the pulverized coal injected into the blast furnace preferably adopts nitrogen as a main carrier gas, and when nitrogen is adopted as the purge gas, one of the nitrogen and the purge gas enters the equalized-pressure gas storage cabinet 31, so that the adverse effect on the pulverized coal injection carrier gas is small.
In the embodiment, the blowing gas is adopted to drive the residual uniform pressure gas in the furnace top charging bucket 11, so that the full recovery of the uniform pressure gas can be realized, and the problems of high equipment cost and operation cost, overlarge dust concentration in the injected uniform pressure gas, easiness in air entering the furnace top charging bucket 11 due to excessive injection, potential safety hazards and the like caused by the adoption of a traditional injection gas suction mode are solved; because the pressure equalizing gas can be used as the carrier gas for the pulverized coal injected into the blast furnace, on one hand, the resource utilization of the pressure equalizing gas is realized, the using amount of the pulverized coal injection carrier gas can be reduced, on the other hand, the coal gas in the pressure equalizing gas can be simultaneously used as fuel to return to the blast furnace 1, the energy-saving and emission-reducing effects are better, and in addition, the pressure equalizing gas has relatively higher temperature (in the embodiment, the temperature of the pressure equalizing gas taken out from the pressure equalizing gas storage cabinet 31 is within the range of 50-120 ℃), the pulverized coal preheating effect can be realized, and the pulverized coal combustion effect is improved to a certain extent.
Further, in the process of blowing and removing the gas, the fan 251 is adopted to assist the residual pressure-equalizing gas to enter the pressure-equalizing gas storage cabinet 31, so that the pressure-equalizing gas recovery efficiency can be improved, and the normal operation of the furnace top charging operation can be ensured.
In one embodiment, as shown in fig. 2, the pressure equalizing operation of the furnace top bucket 11 adopts a full clean gas pressure equalizing mode, and the specific pressure equalizing operation can refer to the existing full clean gas pressure equalizing mode, which is not described herein again. In this aspect, preferably, the operation of recovering the equalized pressure gas includes:
introducing a part of clean gas in the furnace top charging bucket 11 into a first storage cabinet 311; alternatively, a pressure difference between the top charging bucket 11 and the first storage tank 311 can be utilized to enable a part of the clean gas to flow into the first storage tank 311 from the top charging bucket 11; obviously, the clean gas stored in the first storage tank 311 can be ensured, and the part of the clean gas is preferably recycled as the equalized pressure gas;
then, the remaining clean gas in the furnace top charging bucket 11 is swept and driven into the second storage cabinet 312 by utilizing sweeping gas, wherein the sweeping gas is inert gas harmless to blast furnace smelting; gas is taken from the second storage 312 to be used as a carrier gas for injecting pulverized coal into the blast furnace. Similarly, the inert gas includes, but is not limited to, nitrogen or argon, preferably nitrogen is used as the purge gas, and the pulverized coal injected into the blast furnace is also preferably nitrogen as the primary carrier gas.
In the above-mentioned full clean gas pressure equalizing mode, similarly, in the purging and gas expelling process, the fan 251 can be used to assist in making the residual pressure equalizing gas enter the second storage cabinet 312, so as to improve the pressure equalizing gas recovery efficiency.
In above-mentioned complete clean coal gas voltage-sharing mode, the pressure control based on the system can realize the pressure-sharing gas from the hierarchical utilization, and partly clean coal gas can be retrieved as the pressure-sharing gas, and remaining clean coal gas then gets into second storage cabinet 312 with the sweep gas so that as the coal injection carrier gas, reasonable in design, operational reliability are high, realize the resource utilization of pressure-sharing gas, reducible clean coal gas and the quantity of coal injection carrier gas, have saved simultaneously and have drawn the pressure-sharing gas recovery plant who draws the formula of breathing in.
Example two
The embodiment of the utility model provides a blast furnace charging system, including furnace top material jar 11, furnace top material jar 11 is configured as above blast furnace top material jar voltage-sharing system of diffusing.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a blast furnace top material jar voltage-sharing system of bleeding, includes the voltage-sharing pipeline and the voltage-sharing gas recovery pipeline of being connected with the furnace top material jar, the voltage-sharing gas recovery pipeline that all calms the anger is connected with voltage-sharing gas and stores up cabinet, its characterized in that: the uniform pressure gas storage cabinet is provided with a uniform pressure gas recycling pipe, the uniform pressure gas recycling pipe is provided with a recycling control valve, and the uniform pressure gas recycling pipe is connected with a blast furnace coal injection pipeline.
2. The blast furnace top bucket pressure equalizing and bleeding system according to claim 1, characterized in that: the blast furnace coal injection pipeline comprises an injection tank, a coal injection pipe connected to the injection tank and a gas carrying pipe connected to the coal injection pipe, and the uniform pressure gas recycling pipe is connected to the gas carrying pipe or connected to the coal injection pipe.
3. The blast furnace top bucket pressure equalizing and bleeding system according to claim 2, wherein: the carrier gas pipe is provided with an ejector, and the uniform pressure gas recycling pipe is connected with the ejector.
4. The blast furnace top bucket pressure equalizing and bleeding system according to claim 1, characterized in that: the furnace top material tank is characterized by further comprising a purging pipe connected to the furnace top material tank, wherein the purging pipe is connected with a purging gas source, and a purging control valve is arranged on the purging pipe.
5. The blast furnace top bucket pressure equalizing and bleeding system according to claim 4, characterized in that: the pressure equalizing pipeline comprises a coal gas pressure equalizing pipe and a nitrogen gas pressure equalizing pipe, the coal gas pressure equalizing pipe and the nitrogen gas pressure equalizing pipe are both communicated with the cavity of the furnace top charging bucket, a primary pressure equalizing valve is arranged on the coal gas pressure equalizing pipe, and a secondary pressure equalizing valve is arranged on the nitrogen gas pressure equalizing pipe.
6. The blast furnace top bucket pressure equalizing and bleeding system according to claim 5, characterized in that: the blowing pipe is connected to the nitrogen pressure equalizing pipe.
7. The blast furnace top bucket pressure equalizing and bleeding system according to claim 4, characterized in that: the air-equalizing recovery pipeline is provided with an exhaust bypass, the exhaust bypass is provided with a fan and an exhaust control valve, the air-equalizing recovery pipeline is provided with a recovery control valve, and two ends of the exhaust bypass are positioned on two sides of the recovery control valve.
8. The blast furnace top bucket pressure equalizing and bleeding system according to claim 1, characterized in that: and the uniform-pressure gas recovery pipeline is provided with a dust removal purification mechanism.
9. The utility model provides a blast furnace charging system, includes the furnace roof material jar, its characterized in that: the top charging bucket is provided with the blast furnace top charging bucket pressure equalizing and bleeding system according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220711831.XU CN217377925U (en) | 2022-03-29 | 2022-03-29 | Blast furnace top charging bucket pressure-equalizing bleeding system and blast furnace charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220711831.XU CN217377925U (en) | 2022-03-29 | 2022-03-29 | Blast furnace top charging bucket pressure-equalizing bleeding system and blast furnace charging system |
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| CN217377925U true CN217377925U (en) | 2022-09-06 |
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| CN202220711831.XU Active CN217377925U (en) | 2022-03-29 | 2022-03-29 | Blast furnace top charging bucket pressure-equalizing bleeding system and blast furnace charging system |
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