CN116300677A - Device for uniformly regulating local oxygen-enriched furnace condition of blast furnace tuyere and application method thereof - Google Patents
Device for uniformly regulating local oxygen-enriched furnace condition of blast furnace tuyere and application method thereof Download PDFInfo
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- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 121
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 26
- 239000007789 gas Substances 0.000 claims description 18
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- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
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- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1103—Special, intelligent I-O processor, also plc can only access via processor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention provides a device for uniformly regulating local oxygen-enriched furnace conditions at a blast furnace tuyere and a use method thereof, belonging to the technical field of ferrous metallurgy. The invention realizes on-line regulation of the shape of the whirling region of the hearth tuyere by arranging the pure oxygen furnace condition regulating device at the tuyere near the part with unsmooth ventilation of the blast furnace, so as to improve the uniformity of the local airflow and furnace burden movement of the hearth.
Description
Technical Field
The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a device for uniformly regulating local oxygen-enriched furnace conditions of a blast furnace tuyere and a use method thereof.
Background
Research and practice prove that in the blast furnace smelting process, the ventilation and liquid permeability of a material column in front of each tuyere are different due to the difference of raw fuel distribution in the furnace and tapping conditions of each iron notch, the difference of an air supply system and air supply equipment, and the like, and the air supply air quantity of each tuyere is inconsistent, so that the condition of uneven production state in the circumferential direction of the lower part of the blast furnace is easily caused by long-time smelting, namely, local reaction is active, relative dead zones are locally generated, further abnormal furnace conditions such as furnace burden deflection, unsmooth local air flow, and the like are caused, and the stable high-yield operation of the blast furnace is influenced.
The lower regulating agent for blast furnace production changes parameters such as furnace inlet air quantity, air temperature, coal injection quantity, oxygen enrichment rate and the like by mainly adjusting an air supply system, and improves the movement conditions of gas and furnace burden in the furnace. However, the adjustment is carried out on the whole blast furnace, when the condition of uneven production furnace conditions in the circumferential direction of the blast furnace occurs, the tuyere small sleeve can be replaced only after the blast furnace is in a damping down state, the diameter, the air supply angle or the tuyere length of a local tuyere are changed, and even the local tuyere is blocked, so that the air quantity of each tuyere of the blast furnace is adjusted and distributed. The method has long treatment time and high labor intensity, and the production stability and the yield are affected by the damping down, so that the labor injury is easy to occur in the operation process.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the device for uniformly regulating the local oxygen-enriched furnace condition of the blast furnace tuyere and the use method thereof, which are used for solving the actual production problem in the background art. Aiming at the problems of long treatment time, high labor intensity, production fluctuation, reduction of yield, complex operation and the like of the existing blast furnace in a mode that the blast furnace needs to be changed by damping down, the invention adds the local oxygen-enriched adjusting device at the blast furnace, thereby realizing the on-line accurate adjustment of the blast furnace condition without damping down.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the scheme provides a device for uniformly regulating local oxygen-enriched furnace conditions at a blast furnace tuyere, which comprises an oxygen automatic pressure regulating box, a PLC control system and an energy storage pressure storage tank;
the oxygen automatic pressure regulating box is used for regulating the pressure of the input oxygen and reducing the pressure to meet the pressure range required by the regulation of the furnace condition;
the PLC control system is used for controlling the oxygen pressure and the flow regulating valve, measuring the oxygen consumption and monitoring the pressure of the energy storage pressure storage tank body;
the energy storage pressure storage tank is used for storing input oxygen, meets the requirement of instantaneous high-flow oxygen, and directly leads the oxygen to the blast furnace tuyere platform through a pipeline.
Further, the oxygen automatic pressure regulating box comprises a manual stop valve, a main pipe nitrogen purging hole, a manual stop valve, a filter, a main pipe flowmeter, an on-site pressure gauge, a pressure transmitter, a gas/manual pressure regulating valve, a safety valve, a main pipe check valve, a main pipe flame arrester, an energy storage pressure storage tank interface and a main pipe diffuser which are connected through pipelines in sequence; the energy storage pressure storage tank interface is connected with the energy storage pressure storage tank.
Still further, the energy storage pressure storage tank comprises an energy storage pressure storage tank body, and a relief pipe, an on-site pressure gauge and a pressure gauge transmitter which are positioned on the energy storage pressure storage tank body; the energy storage pressure storage tank body is connected with the energy storage pressure storage tank interface through an inlet stop valve.
Still further, the output end of the energy storage pressure storage tank body is connected with the input end of an outlet stop valve, the output end of the outlet stop valve is sequentially connected with a branch pipe nitrogen purging hole, a branch pipe flowmeter, a gas/manual regulating valve, a branch pipe check valve, a branch pipe flame arrester, a metal hose and a branch pipe diffusing hole through pipelines, and the branch pipe diffusing hole is sequentially connected with a blowing pipe inlet stop valve and a quick-change total oxygen high-jet dispensing gun through pipelines; the output end of the quick-change total oxygen high-jet dispensing gun is arranged at the blast furnace tuyere.
The invention provides a use method of a device for uniformly regulating local oxygen-enriched furnace conditions of a blast furnace tuyere, which comprises the following steps:
s1, determining operation parameters of a device for uniformly regulating local oxygen-enriched furnace conditions of a blast furnace tuyere according to blast furnace air supply parameters;
s2, connecting the quick-change total oxygen high-jet dispensing gun to a belly pipe of a corresponding air port;
s3, opening a manual stop valve of the oxygen supply pipeline, and communicating the metal hose with the quick-change total oxygen high-jet dispensing gun to enable oxygen to enter the quick-change total oxygen high-jet dispensing gun;
s4, operating the PLC control system and initializing operation parameters;
s5, opening a blowpipe inlet stop valve, and communicating the belly pipe with the blast furnace to enable oxygen to enter the blast furnace;
s6, utilizing a PLC control system to automatically adjust the pressure and flow of the oxygen fed into the furnace by analyzing the pressure at the top of the blast furnace and the temperature of the hearth, analyzing the position of the tuyere to be adjusted, setting oxygen adjustment and operating parameters of the furnace condition, and controlling corresponding valves, wherein if the PLC control system fails, the pressure and the flow of the oxygen fed into the furnace are adjusted according to the opening of the on-site pressure gauge and the pressure gauge transmitter indicating gas/manual pressure adjustment valve;
s7, observing the working state before the tuyere and the instrument data monitored by the blast furnace, and adjusting the oxygen pressure and flow;
s8, after the furnace condition is normal, closing the inlet stop valve of the blowpipe, then closing the inlet stop valve, the gas/manual regulating valve and the pneumatic stop valve, and finally closing the outlet stop valve to completely realize the shutoff of oxygen;
s9, removing the quick-change total oxygen jet gun connected with the belly pipe;
s10, recovering the production state of the original blast furnace tuyere platform.
Further, the operation parameters include the number of tuyeres for pure oxygen, position information, and oxygen flow rate per tuyere.
The invention has the beneficial effects that:
by adopting the application method of the invention, the PLC control system is adjusted to supply oxygen to one or more tuyeres of the blast furnace, and the oxygen supply intensity of a local area is adjusted, thereby realizing the following steps:
the theoretical combustion temperature of the corresponding tuyere is increased, the gas temperature and the concentration of CO in the gas are increased, and the reaction enhancement of the region is realized, so that the uniformity of the thermal state in the circumferential direction of the regulating hearth is improved;
the pulverized coal combustion effect of the corresponding tuyere is enhanced, the unburned pulverized coal brought into the dead material column is reduced, the ventilation and liquid permeability of the dead material column in the region is improved, and the uniformity of airflow and furnace burden movement in the circumferential direction of a hearth is regulated;
the traditional regulating method for improving the uniformity of the furnace condition of the blast furnace is to regulate the air supply area of part of the air openings and replace the small air opening sleeves with different calibers when the blast furnace is in damping down. The damping down influences the blast furnace yield and the iron-making production scheduling, and the labor intensity of workers is increased. The invention can accurately regulate the blast furnace condition on line without stopping the furnace and damping down, flexibly install the oxygen spray gun and adjust the oxygen supply intensity, realize the directional regulation of the blast furnace condition and the uniformity regulation of the whole furnace condition at high automation level, and provide a regulating means for the stable and smooth running of the blast furnace condition of enterprises and the production with high yield and low consumption.
Drawings
Fig. 1 is a schematic structural diagram of the device.
Fig. 2 is a process flow diagram of the present apparatus.
The device comprises a 1-manual stop valve, a 2-main pipe nitrogen purging hole, a 3-manual stop valve, a 4-filter, a 5-main pipe flowmeter, a 6-on-site pressure gauge, a 7-pressure transmitter, an 8-gas/manual pressure regulating valve, a 9-safety valve, a 10-main pipe check valve, an 11-main pipe flame arrestor, a 12-main pipe diffuser, a 13-inlet stop valve, a 14-diffusing pipe, a 15-on-site pressure gauge, a 16-pressure gauge transmitter, a 17-energy storage pressure tank body, an 18-outlet stop valve, a 19-branch pipe nitrogen purging hole, a 20-branch pipe flowmeter, a 21-gas/manual regulating valve, a 22-branch pipe check valve, a 23-branch pipe flame arrestor, a 24-metal hose, a 25-branch pipe diffusing hole, a 26-blowing pipe inlet stop valve, a 27-quick-change full-oxygen high-jet dispensing gun, a 28-blast furnace, a 29-energy storage pressure tank interface and a 30-PLC control system.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
As shown in FIG. 1, the invention provides a device for uniformly regulating the local oxygen-enriched furnace condition of a blast furnace tuyere, which comprises an oxygen automatic pressure regulating box, a PLC control system 30 and an energy storage pressure storage tank;
the oxygen automatic pressure regulating box is used for regulating the pressure of the input oxygen and reducing the pressure to meet the pressure range required by the regulation of the furnace condition;
the PLC control system 30 is used for controlling the oxygen pressure and flow regulating valve, metering the oxygen consumption and monitoring the pressure of the energy storage pressure storage tank body;
the energy storage pressure storage tank is used for storing input oxygen, meeting the use of instantaneous high-flow oxygen and directly leading the oxygen to a blast furnace 28 tuyere platform through a pipeline.
The oxygen automatic pressure regulating box comprises a manual stop valve 1, a main pipe nitrogen purging hole 2, a manual stop valve 3, a filter 4, a main pipe flowmeter 5, an on-site pressure gauge 6, a pressure transmitter 7, a gas/manual pressure regulating valve 8, a safety valve 9, a main pipe check valve 10, a main pipe flame arrester 11, an energy storage pressure storage tank interface 29 and a main pipe diffuser 12 which are connected through pipelines in sequence; the accumulator port 29 is connected to the accumulator.
The energy storage pressure storage tank comprises an energy storage pressure storage tank body 17, a relief pipe 14, an on-site pressure gauge 15 and a pressure gauge transmitter 16, wherein the relief pipe 14, the on-site pressure gauge 15 and the pressure gauge transmitter 16 are arranged on the energy storage pressure storage tank body 17; the accumulator body 17 is connected to the accumulator connection 29 via the inlet shut-off valve 13.
The output end of the energy storage pressure storage tank body 17 is connected with the input end of an outlet stop valve 18, the output end of the outlet stop valve 18 is sequentially connected with a branch pipe nitrogen purging hole 19, a branch pipe flowmeter 20, a gas/manual regulating valve 21, a branch pipe check valve 22, a branch pipe flame arrester 23, a metal hose 24 and a branch pipe diffusing hole 25 through pipelines, and the branch pipe diffusing hole 25 is sequentially connected with a blowing pipe inlet stop valve 26 and a quick-change total oxygen high-jet dispensing gun 27 through pipelines; the output end of the quick-change total oxygen high-jet dispensing gun 27 is arranged at the tuyere of the blast furnace 28.
In this embodiment, when in use, oxygen is input into the energy storage pressure storage tank body 17 through an automatic oxygen pressure regulating tank composed of a manual stop valve 1, a main pipe nitrogen purge hole 2, a pneumatic stop valve 3, a filter 4, a main pipe flowmeter 5, an on-site pressure gauge 6, a pressure transmitter 7, a gas/manual pressure regulating valve 8, a safety valve 9, a main pipe check valve 10, a main pipe flame arrester 11, a main pipe relief pipe 12 and an energy storage pressure storage tank interface 29. The oxygen flow of the quick-change total oxygen jet gun 27 is regulated by a branch nitrogen purge hole 19, a branch flow meter 20, a gas/manual regulating valve 21, a branch check valve 22, a branch flame arrester 23, a metal hose 24 and a branch diffusing hole 25. The state of the energy storage pressure storage tank body 17 is monitored and regulated by the energy storage pressure storage tank relief pipe 14, the energy storage pressure storage tank in-situ pressure gauge 15, the energy storage pressure storage tank outlet stop valve 18 and the energy storage pressure gauge transmitter 16. The piping is led to the tuyere platform of the blast furnace 28 by means of an installation arrangement of an oxygen automatic pressure regulating tank and an associated valve system. The blast furnace 28 tuyere platform is provided with pipelines such as an energy storage pressure storage tank, a metal hose 24 and the like, and the pipelines are communicated with an automatic oxygen pressure regulating box, a blowpipe inlet stop valve 26 and a quick-change total oxygen jet gun 27, and a PLC control system 30 is debugged, so that the valve control is flexible, and the signal transmission is accurate. After the equipment is communicated, firstly, air tightness and pressure maintaining tests are carried out, and after the test passes, construction work is started. Firstly, a certain amount of nitrogen is filled into a pipeline for protection, and then valves in front of the inlet of the quick-change total oxygen jet gun 27 are slowly opened in sequence according to the flowing direction of oxygen. The pressure in the system is adjusted to be within the range of 10% -30% higher than the blowing pressure by the PLC control system 30 according to the blowing pressure condition of the blast furnace 28. After the pressure is stable, an inlet valve of the quick-change total oxygen jet gun 28 is opened, the pure oxygen charging adjustment is started, and the flow of the pure oxygen charging is adjusted through the PLC control system 30 according to the actual state before the tuyere in the process. Pure oxygen enters the blowpipe and then is mixed with hot air entering the furnace, so that the oxygen enrichment rate of the air entering the furnace at the air port can be improved, the combustion condition of the air port is improved, the active air port swirling area is achieved, the local smelting environment is changed, and finally the aim of regulating the whole furnace condition is fulfilled.
In this embodiment, the manual shutoff valve 1, the main pipe nitrogen purge hole 2, the pneumatic shutoff valve 3, the filter 4, the main pipe flowmeter 5, the on-site pressure gauge 6, the pressure transmitter 7, the gas/manual pressure regulating valve 8, the safety valve 9, the main pipe check valve 10, the main pipe flame arrester 11, the energy storage pressure storage tank interface 29 and the main pipe diffusing pipe 12 are connected in sequence through the pipeline communication, so that the oxygen gas input into the energy storage pressure storage tank body 17 can be regulated by the automatic oxygen regulating box composed of the manual shutoff valve 1, the main pipe nitrogen purge hole 2, the pneumatic shutoff valve 3, the filter 4, the main pipe flowmeter 5, the on-site pressure gauge 6, the pressure transmitter 7, the gas/manual pressure regulating valve 8, the safety valve 9, the main pipe check valve 10, the main pipe flame arrester 11, the main pipe diffusing pipe 12 and the energy storage pressure storage tank interface 29.
In this embodiment, an inlet stop valve 13 is connected between the accumulator body 17 and the port 29 in a communicating manner, and the circulation state between the accumulator body 17 and the accumulator port 29 is adjusted. The output end of the quick-change total oxygen jet gun 27 is arranged at a tuyere of the blast furnace 28, and oxygen is finally fed into the blast furnace 28 through a tuyere belly pipe.
As shown in FIG 2, the invention provides a method for using a device for uniformly regulating the local oxygen-enriched furnace condition of a blast furnace tuyere, which comprises the following steps:
s1, determining operation parameters of a device for uniformly regulating partial oxygen-enriched furnace conditions of a blast furnace tuyere according to air supply parameters of a blast furnace 28, wherein the operation parameters comprise the number of tuyeres accessed with pure oxygen, position information and oxygen supply flow of each tuyere;
s2, connecting the quick-change total oxygen high-jet dispensing gun 27 to a belly pipe of a corresponding air port;
s3, opening the manual stop valve 1 of the oxygen supply pipeline, and communicating the metal hose 24 with the quick-change total oxygen high-jet dispensing gun 27 to enable oxygen to enter the quick-change total oxygen high-jet dispensing gun 27;
s4, operating the PLC control system 30 and initializing operation parameters;
s5, opening a blowpipe inlet stop valve 26, communicating the belly pipe with the blast furnace 28, and enabling oxygen to enter the blast furnace 28;
s6, utilizing a PLC control system 30 to automatically adjust the pressure and flow of the oxygen fed into the furnace by analyzing the pressure at the top of the blast furnace and the temperature of the hearth, analyzing the position of the tuyere to be adjusted, setting oxygen adjustment and operating parameters of the furnace condition, and controlling corresponding valves, wherein if the PLC control system 30 fails, the pressure and the flow of the oxygen fed into the furnace are adjusted according to the on-site pressure gauge 15 and the opening degree of the pressure gauge transmitter 16, which indicate the gas/manual pressure adjusting valve 8; the method comprises the steps of carrying out a first treatment on the surface of the
S7, observing the working state before the tuyere and the instrument data monitored by the blast furnace 28, and adjusting the oxygen pressure and flow;
s8, after the furnace condition is normal, closing the blowing pipe inlet stop valve 26, then closing the inlet stop valve 13, the pneumatic/manual regulating valve 21 and the pneumatic cut-off valve 3, and finally closing the outlet stop valve 18 to completely realize the cut-off of oxygen;
s9, removing the quick-change total oxygen jet gun 27 connected with the belly pipe and protecting the gun;
s10, recovering the production state of the original blast furnace 28 tuyere platform.
In this embodiment, for the case where the oxygen supply is sufficient: taking a certain blast furnace air supply parameter as an example (the number of blast furnace air inlets is 30, and the furnace inlet air quantity is 5150m 3 The oxygen enrichment rate is 3.63 percent per minute; oxygen flow 250m 3 /min, purity 99.5%). The uniformity of the blast furnace hearth is different, the tapping amount at one side of the part is less, and the blanking speed is low. Pure oxygen is sprayed into 3 partial tuyeres in the area, under the condition that other tuyeres are unchanged in parameters, the oxygen enrichment rate of the 3 tuyeres is improved to 6%, and then each tuyeres is sprayed with oxygen 15m 3 Per min, total of about 45m 3 And/min. As the local oxygen supply condition is improved, the brightness of the 3 tuyeres is obviously enhanced after a certain time of operation, the working conditions of the 3 tuyeres are basically consistent with those of other tuyeres, the iron tapping amount of each iron ladle is close, and the overall uniformity is obviously improved.
In this embodiment, for the case of insufficient oxygen supply: taking a certain blast furnace air supply parameter as an example (the number of air openings is 24, and the furnace inlet air quantity is 4120 m) 3 Per min, the oxygen enrichment rate is 3.3%, and the oxygen flow is 180m 3 /min, purity 99.5%). Because the oxygen supply capacity of the blast furnace reaches the upper limit, the overall oxygen enrichment rate is reduced to 2.5% under the condition that the total oxygen enrichment amount is unchanged, and the injection pure oxygen inflow amount is increased to 5.9% at the partial 3 tuyeres of the inactive region. Because the local oxygen supply condition is improved, after a certain time of operation, the local dead zone becomes active, the air flow of the material column is uniformly distributed, the pressure difference is reduced to a certain extent, and the overall uniformity is improved.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The device for uniformly regulating the local oxygen-enriched furnace condition of the blast furnace tuyere is characterized by comprising an oxygen automatic pressure regulating box, a PLC control system (30) and an energy storage pressure storage tank;
the oxygen automatic pressure regulating box is used for regulating the pressure of the input oxygen and reducing the pressure to meet the pressure range required by the regulation of the furnace condition;
the PLC control system (30) is used for controlling the oxygen pressure and the flow regulating valve, metering the oxygen consumption and monitoring the pressure of the energy storage pressure storage tank body;
the energy storage pressure storage tank is used for storing input oxygen, meets the use of instantaneous high-flow oxygen, and directly leads the oxygen to an air port platform of the blast furnace (28) through a pipeline.
2. The blast furnace tuyere local oxygen-enriched furnace condition uniform regulating device according to claim 1, wherein the oxygen automatic pressure regulating box comprises a manual stop valve (1), a main pipe nitrogen purge hole (2), a manual stop valve (3), a filter (4), a main pipe flowmeter (5), an on-site pressure gauge (6), a pressure transmitter (7), a gas/manual pressure regulating valve (8), a safety valve (9), a main pipe check valve (10), a main pipe flame arrester (11), an energy storage pressure tank interface (29) and a main pipe diffuser (12) which are connected in sequence through pipelines; the energy storage pressure storage tank interface (29) is connected with the energy storage pressure storage tank.
3. The blast furnace tuyere local oxygen-enriched furnace condition uniform regulating device according to claim 2, wherein the energy storage pressure storage tank comprises an energy storage pressure storage tank body (17), and a relief pipe (14), an on-site pressure gauge (15) and a pressure gauge transmitter (16) which are positioned on the energy storage pressure storage tank body (17); the energy storage pressure storage tank body (17) is connected with the energy storage pressure storage tank connector (29) through the inlet stop valve (13).
4. The blast furnace tuyere local oxygen-enriched furnace condition uniform regulating device according to claim 1, wherein the output end of the energy storage pressure storage tank body (17) is connected with the input end of an outlet stop valve (18), the output end of the outlet stop valve (18) is sequentially connected with a branch pipe nitrogen purging hole (19), a branch pipe flowmeter (20), a gas/manual regulating valve (21), a branch pipe check valve (22), a branch pipe flame arrester (23), a metal hose (24) and a branch pipe bleeding hole (25) through pipelines, and the branch pipe bleeding hole (25) is sequentially connected with a blowing pipe inlet stop valve (26) and a quick-change total oxygen high-jet flow regulating gun (27) through pipelines; the output end of the quick-change total oxygen high-jet dispensing gun (27) is arranged at the tuyere of the blast furnace (28).
5. The method for using the blast furnace tuyere local oxygen-enriched furnace condition uniform regulating device according to any one of claims 1 to 4, which is characterized by comprising the following steps:
s1, determining the operation parameters of a device for uniformly regulating the local oxygen-enriched furnace condition of a blast furnace tuyere according to the air supply parameters of a blast furnace (28);
s2, connecting a quick-change total oxygen high-jet dispensing gun (27) to a belly pipe of a corresponding air port;
s3, opening a manual stop valve (1) of the oxygen supply pipeline, and communicating the metal hose (24) with the quick-change full-oxygen high-jet dispensing gun (27) to enable oxygen to enter the quick-change full-oxygen high-jet dispensing gun (27);
s4, operating the PLC control system (30) and initializing operation parameters;
s5, opening a blowpipe inlet stop valve (26), and communicating the belly pipe with the blast furnace (28) to enable oxygen to enter the blast furnace (28);
s6, utilizing a PLC control system (30) to automatically adjust the pressure and flow of the oxygen fed into the furnace by analyzing the pressure at the top of the blast furnace and the temperature of the hearth, analyzing the position of the tuyere to be adjusted, setting oxygen adjustment and operating parameters of the furnace condition, and controlling corresponding valves, wherein if the PLC control system (30) fails, the pressure and the flow of the oxygen fed into the furnace are adjusted according to the opening of an on-site pressure gauge (15) and a pressure gauge transmitter (16) to indicate the opening of an air/manual pressure adjusting valve (8);
s7, observing the working state before the tuyere and the instrument data monitored by the blast furnace (28), and adjusting the oxygen pressure and flow;
s8, after the furnace condition is normal, closing the blowing pipe inlet stop valve (26), then closing the inlet stop valve (13), the pneumatic/manual regulating valve (21) and the pneumatic cut-off valve (3), and finally closing the outlet stop valve (18) to completely realize the cut-off of oxygen;
s9, releasing the quick-change total oxygen jet gun (27) connected with the belly pipe;
s10, recovering the production state of the original blast furnace (28) tuyere platform.
6. The method for using a device for uniformly regulating the local oxygen-enriched furnace condition of the tuyere of a blast furnace according to claim 5, wherein the operation parameters comprise the number of tuyeres for introducing pure oxygen, position information and oxygen supply flow rate of each tuyere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310296846.3A CN116300677A (en) | 2023-03-23 | 2023-03-23 | Device for uniformly regulating local oxygen-enriched furnace condition of blast furnace tuyere and application method thereof |
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