CN217578946U - Pressure-equalizing and bleeding system for blast furnace top charging bucket - Google Patents
Pressure-equalizing and bleeding system for blast furnace top charging bucket Download PDFInfo
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- CN217578946U CN217578946U CN202220709229.2U CN202220709229U CN217578946U CN 217578946 U CN217578946 U CN 217578946U CN 202220709229 U CN202220709229 U CN 202220709229U CN 217578946 U CN217578946 U CN 217578946U
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Abstract
The utility model relates to a blast furnace top material jar voltage-sharing bleeding system, including the furnace top material jar, the furnace top material jar disposes voltage-sharing pipeline and voltage-sharing gas recovery pipeline, it is equipped with the recovery control valve and is connected with the equal pressure storage cabinet to all calm the anger on the recovery pipeline, still be equipped with the purge gas entry on the furnace top material jar, the purge gas entry connection has the purge pipe, in be equipped with the purge control valve on the purge pipe. The utility model discloses in, adopt the sweep gas to drive the surplus in the furnace roof charging bucket and all compress air, can realize all the recovery of compressing air, avoid adopting traditional drawing to penetrate the mode of breathing in and lead to equipment cost and running cost high, draw the pressure-equalizing gas of penetrating in dust concentration too big, excessively draw and penetrate and easily make the interior entering air of furnace roof charging bucket and cause the potential safety hazard scheduling problem.
Description
Technical Field
The utility model belongs to the technical field of blast furnace production, concretely relates to pressure-equalizing bleeding system of blast furnace top material tank.
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 blast furnace pressure equalizing and diffusing is not a little, and the diffused gas not only wastes energy but also pollutes the atmosphere. The circulation is used as the pressure-equalizing gas behind this part of coal gas recovery in some enterprises, however, will fully retrieve the coal gas in the feed tank, need be equipped with the ejector, based on the aerodynamic principle of ejector, with the residual coal gas in the suction feed tank is formed to the high-pressure gas efflux, equipment cost and running cost are high, dust concentration is too big in the gas of drawing the jet, excessively draws and easily makes the interior entering air of feed tank and cause the potential safety hazard.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a pressure-equalizing and bleeding system of a blast furnace top material tank, which can at least solve part of the defects of the prior art.
The utility model relates to a blast furnace top material jar voltage-sharing bleeding system, including the furnace top material jar, the furnace top material jar disposes voltage-sharing pipeline and voltage-sharing gas recovery pipeline, it is equipped with the recovery control valve and is connected with the equal pressure storage cabinet to all calm the anger on the recovery pipeline, still be equipped with the purge gas entry on the furnace top material jar, the purge gas entry connection has the purge pipe, in be equipped with the purge control valve on the purge pipe.
As one embodiment, the pressure equalizing pipeline comprises a gas pressure equalizing pipeline and a nitrogen pressure equalizing pipeline, the gas pressure equalizing pipeline and the nitrogen pressure equalizing pipeline are both communicated with the cavity of the furnace top charging bucket, a primary pressure equalizing valve is arranged on the gas pressure equalizing pipeline, and a secondary pressure equalizing valve is arranged on the nitrogen pressure equalizing pipeline.
In one embodiment, the purge pipe is connected to the nitrogen pressure equalizing pipe.
In one embodiment, the purge line is connected to a nitrogen source.
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, and two ends of the exhaust bypass are located on two sides of the recovery control valve.
As one of the implementation modes, the pressure-equalizing bleeding system of the blast furnace top charging bucket further comprises a bleeding pipe, wherein a bleeding valve is arranged on the bleeding pipe, and the bleeding pipe is connected to the furnace top charging bucket or is connected to the pressure-equalizing gas recovery pipeline in a side-by-side mode; when the evacuation pipe is connected to the air-equalizing recovery pipeline, the bypass point of the evacuation pipe is located at the upstream of the recovery control valve.
In one embodiment, the purge gas inlet is located at the bottom of the top bucket.
In one embodiment, the pressure equalizing gas recovery line is provided with a dust removal purification mechanism.
The utility model discloses following beneficial effect has at least: the utility model discloses in, adopt the sweep gas to drive the surplus in the furnace roof charging bucket and all compress air, can realize all the recovery of compressing air, avoid adopting traditional drawing to penetrate the mode of breathing in and lead to equipment cost and running cost high, draw the pressure-equalizing gas of penetrating in dust concentration too big, excessively draw and penetrate and easily make the interior entering air of furnace roof charging bucket and cause the potential safety hazard scheduling problem.
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 pressure equalizing and bleeding system of a blast furnace top charging bucket provided by the embodiment of the invention;
fig. 2 is a schematic structural diagram of another blast furnace top charging bucket pressure-equalizing bleeding system provided by the embodiment of the utility model.
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 in 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.
As fig. 1, the embodiment of the utility model provides a blast furnace top material jar voltage-sharing bleeding system, including furnace top material jar 11, furnace top material jar 11 disposes voltage-sharing pipeline and voltage-sharing gas recovery pipeline 24, be equipped with the recovery control valve on the voltage-sharing gas recovery pipeline 24 and be connected with voltage-sharing gas storage cabinet 31, still be equipped with the purge gas entry on the furnace top material jar 11, the purge gas entry connection has purge tube 23, in be equipped with the purge control valve on the purge tube 23.
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, a pressure equalizing blow-off pipe 26 is connected to the charging bucket air vent of the furnace top charging bucket 11, and a pressure equalizing pipeline and a pressure equalizing gas recovery pipeline 24 are respectively connected to the pressure equalizing blow-off pipe 26; the pressure equalizing and bleeding pipe 26 can be provided with a coarse dust removal unit 28, the pressure equalizing gas leading to the furnace top charging bucket 11 and the recycling pressure equalizing gas leading to the pressure equalizing gas storage tank 31 can both remove 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.
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.
The purge pipe 23 is connected to a purge gas source, which is preferably an inert gas source, including but not limited to nitrogen or argon, in this embodiment, nitrogen is used as the purge gas, and when the system adopts the primary gas pressure equalizing step + the secondary nitrogen pressure equalizing step, the purge gas and the pressure equalizing nitrogen can be taken from the same pressure equalizing nitrogen source 222, for example, the purge pipe 23 is connected to the nitrogen pressure equalizing pipe 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.
Further, in the purging and gas expelling process, the fan 251 is adopted to assist in enabling the residual pressure-equalizing gas to enter the pressure-equalizing gas storage tank 31, and 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 pressure equalizing air recycling pipeline 24, a fan 251 and an exhaust control valve are arranged on the exhaust bypass 25, and two ends of the exhaust bypass 25 are located at two sides of the recycling 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.
As shown in fig. 1 and fig. 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 can be evacuated, so that the inside of the top bucket 11 is in a non-pressure state, and a next charging procedure can be performed, that is, the pressure-equalizing bleeding system of the top bucket of the blast furnace further comprises a bleeding pipe 27, wherein a bleeding valve is arranged on the bleeding pipe 27, and the bleeding pipe 27 is connected to the top bucket 11 or is connected to the pressure-equalizing gas recovery pipeline 24; when the evacuation pipe 27 is connected to the pressure equalizing gas recovery pipe 24, the connection point is located upstream of the recovery control valve. A silencer 271 may be further provided on the evacuation pipe 27.
Further, as shown in fig. 1 and 2, a pressure equalizing gas recycling pipe 32 is arranged on the pressure equalizing gas storage cabinet 31, a recycling control valve is arranged on the pressure equalizing gas recycling pipe 32, and the pressure equalizing gas recycling pipe 32 is connected with a blast furnace coal injection pipeline.
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 pressure equalizing 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. The blast furnace coal powder injection preferably adopts nitrogen as main carrier gas, and when nitrogen is adopted as purge gas, one of the nitrogen and the purge gas enters the uniform pressure gas storage cabinet 31, so that the adverse effect on the coal powder injection carrier gas is small.
In the above-mentioned manner of equalizing pressure of the total clean gas, preferably, the operation of recovering 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 residual clean gas in the furnace top charging bucket 11 is swept and driven into the second storage cabinet 312 by utilizing the sweep gas; gas is taken from the second storage 312 to be used as a carrier gas for the pulverized coal injection into 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 tank 311 can be recycled as the pressure equalizing gas, and accordingly, a pressure equalizing gas circulating pipe is connected to the first storage tank 311, and the pressure equalizing gas circulating pipe is connected to the pressure equalizing pipeline or 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.
For the above scheme of the primary gas pressure equalizing step and the secondary nitrogen pressure equalizing step, preferably, the recovery operation of the equalized pressure gas comprises: 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 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 the sweep gas.
In this embodiment, the pressure equalizing gas is used as the carrier gas for the pulverized coal injected into the blast furnace, so that the resource utilization of the pressure equalizing gas is realized, the usage amount of the pulverized coal injection carrier gas can be reduced, and on the other hand, the coal gas in the pressure equalizing gas can be returned to the blast furnace 1 as fuel, so that the energy saving and emission reduction effects are good.
In this embodiment, adopt the sweep gas to drive the surplus in the furnace roof charging bucket 11 and all calmly anger, can realize the recovery entirely of calmly anger, avoid adopting traditional drawing to penetrate the mode of breathing in and lead to equipment cost and running cost high, draw the pressure-equalizing gas of penetrating too big, excessively draw and penetrate and easily make the interior entering air of furnace roof charging bucket 11 and cause the potential safety hazard scheduling problem.
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 (8)
1. The utility model provides a blast furnace top material jar voltage-sharing system of bleeding, includes the furnace top material jar, the furnace top material jar disposes voltage-sharing pipeline and voltage-sharing gas recovery pipeline, be equipped with the recovery control valve on the voltage-sharing gas recovery pipeline and be connected with voltage-sharing gas and store up cabinet, its characterized in that: still be equipped with the sweeping gas entry on the furnace top material jar, the sweeping gas entry is connected with the pipe that sweeps, in it sweeps and manages to be equipped with the control valve that sweeps.
2. The blast furnace top bucket pressure equalizing and bleeding system according to claim 1, characterized in that: the pressure equalizing pipeline comprises a gas pressure equalizing pipeline and a nitrogen pressure equalizing pipeline, the gas pressure equalizing pipeline and the nitrogen pressure equalizing pipeline are both communicated with the cavity of the furnace top charging bucket, a primary pressure equalizing valve is arranged on the gas pressure equalizing pipeline, and a secondary pressure equalizing valve is arranged on the nitrogen pressure equalizing pipeline.
3. The blast furnace top bucket pressure equalizing and bleeding system according to claim 2, characterized in that: the blowing pipe is connected to the nitrogen equalizing pipeline.
4. The blast furnace top bucket pressure equalizing and bleeding system according to claim 1, characterized in that: the purging pipe is connected with a nitrogen source.
5. The blast furnace top bucket pressure equalizing and bleeding system according to claim 1, characterized in that: the air equalizing and recycling pipeline is provided with an exhaust bypass, the exhaust bypass is provided with a fan and an exhaust control valve, and two ends of the exhaust bypass are positioned on two sides of the recycling control valve.
6. The blast furnace top bucket pressure equalizing and bleeding system according to claim 1, characterized in that: the furnace top charging bucket is characterized by further comprising an emptying pipe, wherein a blow-off valve is arranged on the emptying pipe, and the emptying pipe is connected to the furnace top charging bucket or is connected to the pressure-equalizing gas recovery pipeline in a side-by-side mode; when the evacuation pipe is connected to the air-equalizing recovery pipeline, the bypass point of the evacuation pipe is located at the upstream of the recovery control valve.
7. The blast furnace top bucket pressure equalizing and bleeding system according to claim 1, characterized in that: and the purge gas inlet is positioned at the bottom of the furnace top charging bucket.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220709229.2U CN217578946U (en) | 2022-03-29 | 2022-03-29 | Pressure-equalizing and bleeding system for blast furnace top charging bucket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220709229.2U CN217578946U (en) | 2022-03-29 | 2022-03-29 | Pressure-equalizing and bleeding system for blast furnace top charging bucket |
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| CN217578946U true CN217578946U (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220709229.2U Active CN217578946U (en) | 2022-03-29 | 2022-03-29 | Pressure-equalizing and bleeding system for blast furnace top charging bucket |
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| CN (1) | CN217578946U (en) |
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- 2022-03-29 CN CN202220709229.2U patent/CN217578946U/en active Active
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