CN212077100U - Converter oxygen lance system - Google Patents
Converter oxygen lance system Download PDFInfo
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- CN212077100U CN212077100U CN202020362413.5U CN202020362413U CN212077100U CN 212077100 U CN212077100 U CN 212077100U CN 202020362413 U CN202020362413 U CN 202020362413U CN 212077100 U CN212077100 U CN 212077100U
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Abstract
The utility model relates to a converter oxygen lance system, which comprises an oxygen lance, a lance inlet pipe positioned on a vaporization cooling flue and a medium sealing pipeline connected on the lance inlet pipe, wherein a movable sealing ring is sleeved on the oxygen lance and has a closed position embedded on the pipe orifice of the lance inlet pipe along with the lifting of the oxygen lance, an air flow cavity communicated with the inner ring space of the movable sealing ring is formed in the movable sealing ring, and the air flow cavity is communicated with the medium sealing pipeline at the closed position; the medium sealing pipeline comprises a nitrogen supply pipe and a steam supply pipe which are arranged in parallel, and valve control units are arranged on the nitrogen supply pipe and the steam supply pipe. The utility model can flexibly select nitrogen or steam as a sealing air source by configuring the nitrogen supply pipe and the steam supply pipe, thereby saving the rise of smelting cost caused by using a large amount of nitrogen and simultaneously enhancing the sealing effect of the oxygen gun hole; the medium gas flows among the gun inlet pipe, the movable sealing ring and the oxygen lance, the sealing effect is good, and the consumption of the medium gas can be obviously reduced.
Description
Technical Field
The utility model belongs to the technical field of metallurgical equipment, concretely relates to converter oxygen rifle system.
Background
During the blowing of the steel converter, a large amount of high-temperature flue gas and dust can be generated, the furnace gas contains a large amount of toxic gases such as CO and the like, and particularly, the percentage of the CO in the furnace gas reaches 80-90% in the middle stage of the blowing. Therefore, the oxygen lance mouth must be sealed in the blowing process to avoid the escape of toxic gas and prevent the upward flame.
At present, most domestic iron and steel enterprises adopt nitrogen to seal oxygen lance holes, but the nitrogen pressure is generally low, so that the nitrogen seal cannot effectively play roles in fire extinguishing and smoke isolation; the frequent smoking at the nitrogen seal causes the large amount of smoke and dust and the overproof coal gas of the multi-layer platform of the converter. On the other hand, the nitrogen consumption is large, the price is high, and the production running cost is very high.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a converter oxygen lance system, which can at least solve part of the defects of the prior art.
The utility model relates to a converter oxygen lance system, which comprises an oxygen lance, a lance inlet pipe positioned on a vaporization cooling flue and a medium sealing pipeline connected with the lance inlet pipe, wherein a movable sealing ring is sleeved on the oxygen lance and has a closed position embedded on the pipe orifice of the lance inlet pipe along with the lifting of the oxygen lance, an air flow cavity communicated with the inner ring space of the movable sealing ring is formed in the movable sealing ring, and the air flow cavity is communicated with the medium sealing pipeline at the closed position; the medium sealing pipeline comprises a nitrogen supply pipe and a steam supply pipe which are arranged in parallel, and valve control units are arranged on the nitrogen supply pipe and the steam supply pipe.
As one embodiment, a plurality of groups of annular air outlet channels are formed on the inner ring wall body of the movable sealing ring, and the air outlet channels are sequentially arranged from top to bottom and are communicated with the airflow cavity.
In one embodiment, the gas outlet channel comprises an annular gas outlet groove, the gas outlet groove is formed in an inner annular wall body of the movable sealing ring and faces the oxygen lance, the gas flow cavity is an annular cavity, and a plurality of gas outlet holes are correspondingly formed in the inner annular wall body of the movable sealing ring to communicate the gas outlet groove and the gas flow cavity.
As one embodiment, the air outlet channels are adjacently arranged in sequence.
As one embodiment, a fixed sealing ring is arranged in the barrel, and an air inlet channel communicated with the medium sealing pipeline is arranged on the fixed sealing ring; in the closed position, the movable sealing ring is embedded in the fixed sealing ring, and the airflow cavity is communicated with the air inlet channel.
In one embodiment, the stationary sealing ring and the barrel enclose an annular distribution chamber, and the distribution chamber is respectively communicated with the medium sealing pipeline and the air inlet channel.
As one embodiment, the air inlet channel comprises an annular air inlet groove, the air inlet groove is formed in a sealing surface of the fixed sealing ring, and a plurality of air inlet holes are correspondingly formed in the fixed sealing ring to communicate the air inlet groove and the distribution cavity; and a plurality of air passing holes are correspondingly formed in the outer ring wall body of the movable sealing ring along the circumferential direction of the outer ring wall body, each air passing hole is communicated with the airflow cavity, and each air passing hole is communicated with the air inlet groove in the closed position.
In one embodiment, the movable sealing ring is in a wedge-shaped structure with a wide upper part and a narrow lower part.
As one embodiment, the valve control units on the nitrogen gas supply pipe and the steam supply pipe respectively comprise a manual valve, a flow meter, a stop valve and a check valve which are arranged in sequence along the gas flow direction.
In one embodiment, the steam supply pipe is connected with a steam heat accumulator in the converter flue gas waste heat utilization system.
The utility model discloses following beneficial effect has at least:
the utility model discloses a configuration nitrogen gas supply pipe and steam supply pipe can provide two kinds of medium gas of nitrogen gas and steam and seal, can select nitrogen gas or steam in a flexible way as sealed air supply according to particular case, both can practice thrift because of using a large amount of nitrogen gas to cause the rising of smelting the cost, and the sealed effect in enhancement oxygen rifle hole simultaneously ensures safety in production, reduces the pollution that the smoke and dust leaked to the environment. The medium gas circulates among the barrel inlet pipe, the movable sealing ring and the oxygen lance, and the medium gas can enter a gap between the barrel inlet pipe and the movable sealing ring and a sleeving gap between the movable sealing ring and the oxygen lance, so that the sealing effect is achieved, the sealing effect is good, and the consumption of the medium gas can be obviously reduced.
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 converter oxygen lance system provided in an embodiment of the present invention;
fig. 2 is a schematic view of a matching structure of the movable sealing ring and the fixed sealing ring provided by the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are described below clearly and completely, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 and 2, the embodiment of the utility model provides a converter oxygen rifle system, include oxygen rifle 2, be located vaporization cooling flue advance barrel 3 and connect in advance the medium sealing pipeline on the barrel 3, the cover is equipped with movable sealing ring 13 on the oxygen rifle 2, movable sealing ring 13 follows oxygen rifle 2 goes up and down and has the closed position of gomphosis on advancing barrel 3 mouth of pipe, be formed with the air current chamber 131 rather than the inner ring space intercommunication in the movable sealing ring 13 closed position, air current chamber 131 with the medium sealing pipeline intercommunication.
The movable sealing ring 13 is obviously of an annular structure, the inner ring of the movable sealing ring is suitable for being sleeved on the oxygen lance 2, and the outer ring of the movable sealing ring is suitable for being embedded on the pipe orifice of the lance inlet pipe 3. The airflow cavity 131 is communicated with the inner ring space of the movable sealing ring 13, namely the airflow cavity 131 is communicated with the sleeving gap between the movable sealing ring 13 and the oxygen lance 2, and the medium gas in the airflow cavity 131 can enter the sleeving gap, so that the sealing effect is achieved.
It can be understood that an air outlet channel is formed on the inner ring wall body of the movable sealing ring 13, and the air outlet channel may be a plurality of air outlet holes directly formed on the inner ring wall body of the movable sealing ring 13; in another embodiment, as shown in FIG. 2, the gas outlet channel is an annular gas outlet channel, the axis of which is generally coincident with the axis of the movable sealing ring 13, and the gas outlet channel 132 comprises an annular gas outlet groove 132, the gas outlet groove 132 is opened on the inner annular wall of the movable sealing ring 13 and faces the oxygen lance 2, the gas flow cavity 131 is an annular cavity, and a plurality of gas outlet holes are correspondingly opened on the inner annular wall of the movable sealing ring 13 to communicate the gas outlet groove 132 and the gas flow cavity 131. The medium gas in the gas flow chamber 131 can enter the gas outlet grooves 132 through the gas outlet holes, and the gas outlet grooves 132 are obviously communicated with the sleeved gap between the movable sealing ring 13 and the oxygen lance 2, so that the medium gas can seal the sleeved gap. The air outlets are circumferentially arranged around the inner ring wall of the movable sealing ring 13, that is, the air outlets of each set of air outlet channels are arranged around the oxygen lance 2, preferably at uniform intervals, wherein the number of the air outlets is better than the number of the air outlets capable of achieving the air curtain sealing effect. By providing the air outlet groove 132, on one hand, the probability of the air outlet hole being blocked can be reduced, and on the other hand, when the medium gas enters the air outlet groove 132 from the air flow chamber 131, the medium gas generally passes through a venturi structure, and the sealing effect can be improved.
Further optimizing the structure, a plurality of groups of annular air outlet channels are formed on the inner ring wall body of the movable sealing ring 13, the air outlet channels are sequentially arranged from top to bottom and are communicated with the airflow cavity 131, and the sealing effect on the sleeving gap can be improved by adopting the plurality of groups of air outlet channels; furthermore, each air outlet channel is arranged adjacently in sequence, and when one or more air outlet holes are blocked or the air outlet pressure is lower, the medium gas of the adjacent air outlet channels can quickly make up the gap of the air curtain in the region, so that the sealing effect is ensured. In the embodiment shown in FIG. 2, two sets of gas outlet channels are included, and the two sets of gas outlet channels are arranged adjacently up and down, so that the sealing requirement between the movable sealing ring 13 and the oxygen lance 2 can be fully met.
Further optimizing the structure, as shown in fig. 2, a fixed sealing ring 14 is arranged in the gun inlet pipe 3, and an air inlet channel communicated with the medium sealing pipeline is arranged on the fixed sealing ring 14; in the closed position, the movable sealing ring 13 is fitted in the stationary sealing ring 14, and the airflow chamber 131 communicates with the intake passage. The fixed sealing ring 14 is matched with the movable sealing ring 13, so that the blocking effect on the oxygen gun hole can be further improved, and the consumption of required medium gas is reduced; the fit clearance between the fixed seal ring 14 and the movable seal ring 13 can be sealed by the gas passage between the gas inlet channel and the gas flow chamber 131, specifically, when the medium gas enters the gas flow chamber 131 through the gas inlet channel, the medium gas can be dispersed to fill the fit clearance between the fixed seal ring 14 and the movable seal ring 13, so as to achieve the sealing purpose.
In one embodiment, as shown in fig. 2, the air inlet channel includes an annular air inlet groove 141, the air inlet groove 141 is opened on the sealing surface of the stationary seal ring 14, a plurality of air inlet holes are correspondingly opened on the stationary seal ring 14 to communicate with the air inlet groove 141, a plurality of air passing holes are correspondingly opened on the outer ring wall body of the movable seal ring 13 along the circumferential direction thereof, each air passing hole is communicated with the airflow chamber 131, and in the closed position, each air passing hole is communicated with the air inlet groove 141. Wherein, the axis of the air inlet groove 141 coincides with the axis of the fixed seal ring 14; the air inlet groove 141 and the air passing holes are correspondingly arranged so that the air passing holes are communicated with the air inlet groove 141 when the movable sealing ring 13 is embedded with the fixed sealing ring 14. It can be seen that, by providing the air inlet groove 141, on one hand, the fitting accuracy between the movable seal ring 13 and the fixed seal ring 14 can be reduced, and the condition that each air passing hole is communicated with the air inlet groove 141 can be satisfied without high fitting accuracy; on the other hand, the gas inlet groove 141 serves as a sealing region, and the gas medium filled in the gas inlet groove 141 can sufficiently seal the fit gap between the fixed seal ring 14 and the movable seal ring 13. In particular, the air inlets are circumferentially arranged along the circumference of the fixed sealing ring 14, that is, the air inlets are arranged around the oxygen lance 2, preferably uniformly spaced, and when the arrangement of the air inlets achieves the air curtain sealing effect, the air curtain sealing can be achieved in the air inlet groove 141, so that the sealing effect is ensured.
Further preferably, as shown in fig. 2, the fixed sealing ring 14 and the barrel 3 enclose an annular distribution chamber 15, and the distribution chamber 15 is respectively communicated with the medium sealing pipeline and the air inlet channel. Due to the arrangement of the annular distribution chamber 15, on the one hand, the number of medium sealing lines can be reduced, and on the other hand, when the medium gas enters the gas inlet groove 141 from the distribution chamber 15, the medium gas generally passes through a venturi structure, and the sealing effect can be improved.
In an alternative embodiment, a structure that two sets of medium-tight pipelines are respectively communicated with the distribution cavity 15 can be adopted, so that in an emergency situation such as a failure of one set of medium-tight pipelines, the other set of medium-tight pipelines can be rapidly put into use, and the continuity of sealing is ensured. In another embodiment, the airflow chamber 131 may be divided into two airflow chambers by a partition, the distribution chamber 15 may be correspondingly divided into two distribution chambers, each distribution chamber is provided with a set of medium sealing pipelines, and in the closed position, the two distribution chambers are in one-to-one correspondence with the two airflow chambers, and based on the structure, two sets of sealing structures may be correspondingly formed, and when one of the two sealing structures fails, the other sealing structure may still ensure the continuity and reliability of the sealing; each airflow chamber can be arranged to form a group of airflow channels correspondingly, and a structure that two groups of air outlet channels are adjacently arranged up and down can be formed, so that the sealing requirement between the movable sealing ring 13 and the oxygen lance 2 can be fully met.
The fixed seal ring 14 and the movable seal ring 13 may be steel structural members or may be made of high temperature resistant rubber. In a preferred structure, as shown in fig. 2, the movable sealing ring 13 is a wedge-shaped structure with a wide top and a narrow bottom, and the fixed sealing ring 14 is correspondingly arranged, so that the engagement effect of the two is better.
And continuing the converter oxygen lance system, as shown in fig. 1, the medium sealing pipeline comprises a nitrogen supply pipe 4 and a steam supply pipe 5 which are arranged in parallel, and valve control units are arranged on the nitrogen supply pipe 4 and the steam supply pipe 5.
Obviously, the nitrogen supply pipe 4 may supply nitrogen; the valve control unit on the nitrogen supply pipe 4 can control the on-off of the nitrogen supply pipe 4, and further can control and monitor the nitrogen supply flow through the valve control unit. The steam supply pipe 5 can supply nitrogen; the valve control unit on the steam supply pipe 5 can control the on-off of the steam supply pipe 5, and further can control and monitor the steam supply flow through the valve control unit. In one embodiment, as shown in fig. 1, the valve control units on the nitrogen gas supply pipe 4 and the steam supply pipe 5 each comprise a manual valve 6, a flow meter 7, a shut-off valve 8 and a check valve 9 arranged in this order in the direction of gas flow; the manual valve 6 is normally open, and the manual valve 6 can be closed when the cut-off valve 8 on the corresponding pipeline needs to be repaired and replaced; the shut-off valve 8 is typically an automatic valve, such as a solenoid valve or a pneumatic valve; the check valve 9 prevents steam from flowing into the nitrogen supply pipe 4 or prevents nitrogen from flowing into the steam supply pipe 5. The flowmeter 7 is used for displaying the instantaneous flow of the medium gas in the pipeline in real time and has an accumulation function so as to accurately measure energy.
Further, the control of the shut valve 8 is switched to a central control operation screen, and is controlled by a PLC. The control mode is manual or automatic, and the pneumatic cut-off valve 8 can be opened and closed at any time when the manual mode is selected; when the automatic mode is selected, the opening and closing of the stop valve 8 are interlocked with the lifting action of the oxygen lance 2, when the oxygen lance 2 descends to enter a certain specified height position (generally called as an opening and closing oxygen point) in the converter 1, the stop valve 8 is automatically opened, and corresponding media are sprayed into the lance inlet pipe 3 to play a sealing role; when the oxygen lance 2 ascends and leaves the opening and closing oxygen point position, the stop valve 8 is automatically closed. Thus, the gas seal is opened only when the oxygen lance 2 is in a blowing state, the gas consumption can be reduced, and the operation cost is reduced.
This embodiment is through configuration nitrogen gas supply pipe 4 and steam supply pipe 5, can provide two kinds of medium gas of nitrogen gas and steam and seal, can select nitrogen gas or steam as sealed air supply in a flexible way according to particular case, both can practice thrift because of using a large amount of nitrogen gas to cause the rise of smelting cost, strengthen the sealed effect in oxygen rifle hole simultaneously, ensure safety in production, reduce the pollution that the smoke and dust leaked the environment.
The nitrogen is preferably introduced from a low-pressure nitrogen pipe network in a workshop, and the pressure is about 0.4 to 0.6 MPa.
In one embodiment, a large amount of steam is generated by heating and vaporizing a vaporization cooling flue in the smelting process of a converter, and part of enterprises are limited in internal steam user points, so that saturated steam generated by the converter 1 is not completely recovered, and a large amount of steam is diffused and wasted, therefore, the steam supply pipe 5 is preferably connected with a steam heat accumulator in a converter flue gas waste heat utilization system, the oxygen lance hole is sealed by utilizing the steam generated by the converter 1, the waste heat resource of the converter is fully utilized, and energy conservation and emission reduction are facilitated. The pressure of the partially saturated steam is about 0.8 to 1.0 MPa. As steam is only provided in a steam pocket during smelting of the converter 1, nitrogen is generally selected as an oxygen lance hole sealing gas source during smelting of molten steel in the first furnaces; when the pressure in the steam pipe network reaches more than 0.4MPa, the stop valve 8 on the nitrogen supply pipe 4 is closed, the stop valve 8 on the steam supply pipe 5 is opened, and steam is used as a sealing air source.
In order to further optimize the above embodiment, as shown in fig. 1, the nitrogen gas supply pipe 4 and the steam gas supply pipe 5 are connected in parallel and then connected to the medium gas main 10, and the medium gas main 10 is communicated with the gas flow chamber 131/the distribution chamber 15. A pressure gauge 11 can be arranged on the medium gas main pipe 10, signals in the pressure gauge 11 can be remotely transmitted to a central control computer, when the pressure value of the medium gas is lower than 0.4MPa, the system displays low-pressure alarm, and an operator can be reminded to adopt corresponding measures, such as termination of smelting production. Further preferably, as shown in fig. 1, the medium gas main 10 has a metal hose section 12, and the metal hose section 12 can be connected to an adjacent metal pipe by a flange, so that the metal hose section 12 can be quickly connected to the metal pipe on the gun barrel 3. Preferably, the metallic hose section 12 has a pressure rating of 1.6MPa to ensure that no leakage occurs during normal operation; the material of the metal hose is preferably 304 stainless steel.
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 (10)
1. The utility model provides a converter oxygen rifle system, includes the oxygen rifle, is located the barrel of advancing on the evaporation cooling flue and connects in advance the sealed pipeline of medium on the barrel, its characterized in that: the movable sealing ring is sleeved on the oxygen lance and has a closed position embedded on the pipe orifice of the gun inlet pipe along with the lifting of the oxygen lance, an airflow cavity communicated with the space of an inner ring of the movable sealing ring is formed in the movable sealing ring, and the airflow cavity is communicated with the medium sealing pipeline at the closed position; the medium sealing pipeline comprises a nitrogen supply pipe and a steam supply pipe which are arranged in parallel, and valve control units are arranged on the nitrogen supply pipe and the steam supply pipe.
2. The converter oxygen lance system of claim 1, wherein: and a plurality of groups of annular air outlet channels are formed on the inner ring wall body of the movable sealing ring, and the air outlet channels are sequentially arranged from top to bottom and are communicated with the airflow cavity.
3. The converter oxygen lance system of claim 2, wherein: the air outlet channel comprises an annular air outlet groove, the air outlet groove is formed in the inner ring wall body of the movable sealing ring and faces the oxygen lance, the airflow cavity is an annular cavity, and a plurality of air outlet holes are correspondingly formed in the inner ring wall body of the movable sealing ring to communicate the air outlet groove with the airflow cavity.
4. The converter oxygen lance system of claim 2, wherein: and the air outlet channels are arranged adjacently in sequence.
5. The converter oxygen lance system of claim 1, wherein: a fixed sealing ring is arranged in the barrel inlet pipe, and an air inlet channel communicated with the medium sealing pipeline is arranged on the fixed sealing ring; in the closed position, the movable sealing ring is embedded in the fixed sealing ring, and the airflow cavity is communicated with the air inlet channel.
6. The converter oxygen lance system of claim 5, wherein: the fixed sealing ring and the barrel inlet pipe are enclosed to form an annular distribution cavity, and the distribution cavity is communicated with the medium sealing pipeline and the air inlet channel respectively.
7. The converter oxygen lance system of claim 6, wherein: the air inlet channel comprises an annular air inlet groove, the air inlet groove is formed in the sealing surface of the fixed sealing ring, and a plurality of air inlet holes are correspondingly formed in the fixed sealing ring to communicate the air inlet groove with the distribution cavity; and a plurality of air passing holes are correspondingly formed in the outer ring wall body of the movable sealing ring along the circumferential direction of the outer ring wall body, each air passing hole is communicated with the airflow cavity, and each air passing hole is communicated with the air inlet groove in the closed position.
8. The converter oxygen lance system of claim 5, wherein: the movable sealing ring is of a wedge-shaped structure with a wide upper part and a narrow lower part.
9. The converter oxygen lance system of claim 1, wherein: the valve control units on the nitrogen supply pipe and the steam supply pipe respectively comprise a manual valve, a flowmeter, a stop valve and a check valve which are sequentially arranged along the airflow direction.
10. The converter oxygen lance system of claim 1, wherein: and the steam supply pipe is connected with a steam heat accumulator in the converter flue gas waste heat utilization system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020362413.5U CN212077100U (en) | 2020-03-20 | 2020-03-20 | Converter oxygen lance system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020362413.5U CN212077100U (en) | 2020-03-20 | 2020-03-20 | Converter oxygen lance system |
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| CN212077100U true CN212077100U (en) | 2020-12-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114540572A (en) * | 2022-02-25 | 2022-05-27 | 重庆钢铁股份有限公司 | Converter waste heat boiler steam self-using system and method |
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2020
- 2020-03-20 CN CN202020362413.5U patent/CN212077100U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114540572A (en) * | 2022-02-25 | 2022-05-27 | 重庆钢铁股份有限公司 | Converter waste heat boiler steam self-using system and method |
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