CN102094105A - Bottom blowing system for converter - Google Patents
Bottom blowing system for converter Download PDFInfo
- Publication number
- CN102094105A CN102094105A CN2009102543139A CN200910254313A CN102094105A CN 102094105 A CN102094105 A CN 102094105A CN 2009102543139 A CN2009102543139 A CN 2009102543139A CN 200910254313 A CN200910254313 A CN 200910254313A CN 102094105 A CN102094105 A CN 102094105A
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- Prior art keywords
- bottom blowing
- pressure
- detecting device
- gas
- converter
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Abstract
The invention provides a bottom blowing system for a converter. The bottom blowing system for the converter comprises an air packet, a regulating valve, a flowmeter, and at least one stop valve, wherein the air packet is used for storing and conveying air; each stop valve is connected in parallel with an air inlet of the air packet through the corresponding switching pipeline; the regulating valve and the flowmeter are connected in series with an air outlet of the air packet through a bottom blowing pipeline; the flowmeter is used for measuring air flow at the air outlet of the air packet; the regulating valve is used for regulating the air flow of the air outlet of the air packet; the system also comprises a controller which is electrically connected with the regulating valve, the flowmeter and each stop valve; and the controller is used for controlling the switch-on and switch-off of each stop valve according to the air supply mode of air which is stored in advance, acquiring the air flow at the air outlet of the air packet, which is measured by the flowmeter, and regulating the regulating valve according to the air flow and the air supply mode. By using the bottom blowing system for the converter, which is provided by the invention, the air flow can be automatically controlled and the working efficiency is greatly improved.
Description
Technical field
The present invention relates to a kind of converter bottom blowing system.
Background technology
At present the gas control mode to bottom blowing pipeline in the steel-making bottom-blown converter generally adopts manual control mode, promptly realizes supply and flow control to gas by manual control valve.Because manually red-tape operati inconvenience can not change automatically with the variation of technology, has had a strong impact on working efficiency.And because existing hand operated control method monitoring means fall behind, can not accurately and timely carry out gas and switch, thereby production cost and steel-making quality have been caused considerable influence.
Summary of the invention
Blow manually control, unhandy problem at prior art transfer furnace bottom, the invention provides a kind of converter bottom blowing system that can control the converter bottom blowing automatically.
The invention provides a kind of converter bottom blowing system, this converter bottom blowing system comprises: gas bag, variable valve, under meter and at least one trip valve, wherein said gas bag is used for storage and transmits gas, each trip valve is connected in parallel on the inlet mouth place of described gas bag by corresponding switching pipeline, described variable valve and described under meter are serially connected in the place, air outlet of described gas bag by the bottom blowing pipeline, described under meter is used to measure the gas flow at the place, air outlet of described gas bag, and described variable valve is used to regulate the gas flow at the place, air outlet of described gas bag; Wherein, this system also comprises: controller, be electrically connected with described variable valve, under meter, each trip valve, this controller is used for controlling according to the gas supplying mode of storage in advance the opening and closing of each trip valve, obtain the gas flow at the place, air outlet of the described gas bag that described flowmeter survey arrives, and described variable valve is regulated according to described gas flow and described gas supplying mode.
According to converter bottom blowing system provided by the invention, opening and closing that can be by the control trip valve, obtain the gas flow in the ground bottom blowing pipeline and variable valve is regulated according to gas flow and gas supplying mode, thereby can control the gas flow in the bottom blowing pipeline in real time, accurately and timely carrying out gas switches, realize the stable supplying of gas flow in the gas piping, and improved working efficiency greatly, reduced production cost, improved the steel-making quality, needing in the prior art to have avoided by manually controlling, operate problems such as inconvenience.
Description of drawings
Fig. 1 is according to the block diagram that is connected between the converter bottom blowing system of one embodiment of the present invention and converter, the air supply header;
Fig. 2 is the block diagram that is connected between converter bottom blowing system and converter, the air supply header of a preferred embodiment of the invention.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing and embodiment.
Fig. 1 is according to the block diagram that is connected between the converter bottom blowing system of one embodiment of the present invention and converter, the air supply header.For describing, also show converter 100 among Fig. 1, variable valve 10 and under meter 20 series connection backs are connected to converter 100 bottoms by the bottom blowing pipeline.As shown in Figure 1, according to converter bottom blowing system 200 provided by the invention: gas bag 30, variable valve 10, under meter 20, and at least one trip valve 40 (two trip valves 40 have been shown among Fig. 1), wherein said gas bag 30 is used for storage and transmits gas, each trip valve is connected in parallel on the inlet mouth place of described gas bag 30 by corresponding switching pipeline, described variable valve 10 and described under meter 20 are serially connected in the place, air outlet of described gas bag 30 by the bottom blowing pipeline, described under meter 20 is used to measure the gas flow at the place, air outlet of described gas bag 30, and described variable valve 10 is used to regulate the gas flow at the place, air outlet of described gas bag 30; Wherein, this system also comprises: controller 50, be electrically connected with described variable valve 10, under meter 20, each trip valve 40, this controller 50 is used for controlling according to the gas supplying mode of storage in advance the opening and closing of each trip valve 40, obtain the gas flow at the place, air outlet of the described gas bag 30 that described under meter 20 measures, and described variable valve 10 is regulated according to described gas flow and described gas supplying mode.
Wherein, gas bag 30 is used to store gas and the transmission gas that switches pipeline from each.
Whether the gas that each trip valve 40 is used for controlling corresponding air supply header 300 flows into described gas bag 30, each trip valve 40 all should be in full open position or complete off-position, gas when being in full open position among the gas main 300 can flow into gas bag 30, and gas can not flow into gas bag 30 when being in complete off-position.Each trip valve 40 is connected with an air supply header 300 respectively, and as shown in Figure 1, each trip valve 40 is connected by switching pipeline with corresponding air supply header 300.
Wherein said gas supplying mode comprises the gas switching time in the blowing process and the gas supply intensity value of each time phase, controller 50 converts gas supply intensity value to the gaseous feed stream amount according to gas intensity-gas flow conversion formula (can be the existing formula in this area), thereby and by measured gas flow and described gaseous feed stream amount relatively come variable valve 10 is regulated gas flow in the control bottom blowing pipeline.The gas supplying mode can be to formulate in advance well, can adopt for example comprise scheme, form such as table, curve, it can be formulated according to the parameters such as carbon content, blowing cycle and tap of different steel grades in the process for making, has comprised in blowing process gaseous species, the air supply intensity variation relation along with the time.Can adopt nitrogen and rare gas elementes such as argon gas and helium as bottom blown gas in concrete enforcement, each air supply header 300 feeds a kind of gas, and air supply intensity is adjustable, and for example the air supply intensity scope can be 0.01-0.1m
3/ mint can decide the time of gas switching and the gas supply intensity value of each time phase according to the carbon content of required steel grade when blowing.Controller 50 can be converted to the gaseous feed stream amount with the air supply intensity value of being stored, and variable valve 10 is regulated, and makes that the gas flow in the bottom blowing pipeline reaches the gaseous feed stream amount.Can adopt gas intensity-gas flow conversion formula as follows when changing:
F＝Q*T*q
Wherein parameter F is represented gas flow to be asked, and unit is per hour (Nm of standard cubic meter
3/ h); Parameter Q represents the converter capacity of employed converter, and unit is a ton (t), for example is 130t or 135t; Parameter T can be constant 60, and unit is minute per hour (min/h); Parameter q is represented air supply intensity, per ton minute (Nm of unit standard cubic meter
3/ mint).
Because the trip valve 40 in the converter bottom blowing system 200 may break down, converter bottom blowing system 200 provided by the invention also comprises at least one limit test set (not shown), the number of limit test set equates with the number of trip valve 40, each limit test set is installed on the corresponding trip valve 40, be used to detect this corresponding trip valve 40 and whether be in complete opening or complete off-position, and be not to be in complete opening or to send the trip valve trouble signal fully during off-position at the trip valve 40 of correspondence.Thereby when any one trip valve 40 in converter bottom blowing system 200 does not correctly open or cut out, can in time report to the police, so that the serviceman handles.
Under meter 20 is used for measuring the gas flow of bottom blowing pipeline, and sends measured gas flow to controller 50, for example can adopt vortex shedding flow meter.
Variable valve wherein shown in Figure 1 10 can exchange with the position of under meter 20, does not promptly limit variable valve 10 and still is under meter 20 and be arranged in from the nearer bottom blowing pipeline of gas bag 30.
Wherein said converter bottom blowing system 200 comprises a plurality of variable valve 10 and a plurality of under meter 20, each variable valve 10 and the place, air outlet that is connected in parallel on described gas bag 30 after each under meter 20 is connected by corresponding bottom blowing pipeline.That is to say, variable valve 10 in the described converter bottom blowing system 200 and under meter 20 all can be for a plurality of, the bottom blowing pipeline that is connected the air outlet place of gas bag 30 can be many, can comprise in every bottom blowing pipeline that wherein a variable valve 10 and a under meter 20 connect mutually.Thereby can be more even so that enter the gas stirring of converter, and gas can't flow into the situation of converter 100 when having avoided having only a bottom blowing pipeline that stopping up appears in this pipeline.For example referring to the embodiment of Fig. 2, wherein said converter bottom blowing system 200 comprises a plurality of variable valve 10 ... 1n, a plurality of under meter 20 ... 2n, wherein n is the integer greater than zero, comprises in every bottom blowing pipeline that a variable valve, a under meter are connected in series to the place, air outlet of gas bag 30.
The problem that the staff can not in time learn at occurring easily in the bottom blowing pipeline stopping up, can store minimum gas flow in the controller 50, the under meter 20 detected gas flows that obtain when described controller 50 can send bottom blowing line clogging guard signal during less than minimum gas flow.Thereby the staff can in time learn in the bottom blowing pipeline and obstruction occur, so that handle.Described predetermined minimum flow rate can be predefined, and for example its scope can be 30Nm
3/ h-50Nm
3/ h is preferably 50Nm
3/ h.
Described controller 50 for example can adopt, and the DCS in western room (dcs) realizes.
Fig. 2 is the block diagram that is connected between converter bottom blowing system and converter, the air supply header of a preferred embodiment of the invention.As shown in Figure 2, except integral part shown in Figure 1, described converter bottom blowing system 200 can also comprise first pressure-detecting device 70, this first pressure-detecting device 70 is by bottom blowing pipeline and variable valve 10, under meter 20 is connected on the place, air outlet of gas bag 30, be electrically connected with described controller 50, be used for detecting the gaseous tension at bottom blowing pipeline first pressure-detecting device 70 places, and send controller 50 to, store the setting pressure of pressure-detecting device 70 place's correspondences in the controller 50, if first pressure-detecting device, 70 detected pressure are greater than setting pressure, obstruction occurred in the then described controller judgement bottom blowing pipeline, and sent the bottom blowpipe road and stop up guard signal.Wherein said first pressure-detecting device 70 can be pressure unit or pressure detector.At this moment, in the bottom blowing pipeline of described first pressure-detecting device 70 between described variable valve 10 and described under meter 20, perhaps be arranged in the bottom blowing pipeline of the either side of described variable valve 10 and described under meter 20 both sides.
Owing to can't judge the position of obstruction when occurring stopping up in the bottom blowing pipeline in the prior art, can only check whole piece bottom blowing pipeline, had a strong impact on overhaul efficiency, therefore converter bottom blowing system 200 provided by the invention can also comprise second pressure-detecting device 80, in the bottom blowing pipeline of this second pressure-detecting device 80 between first pressure-detecting device 70 and described gas bag 30, promptly second pressure-detecting device, 80 to the first pressure-detecting devices 80 are nearer from the distance of gas bag 30, second pressure-detecting device 80 is electrically connected with described controller 50, be used for detecting the gaseous tension at these second pressure-detecting device, 80 places of bottom blowing pipeline, and send described controller 50 to, described controller 50 compares described second pressure-detecting device, 80 detected gaseous tensions and described first pressure-detecting device, 70 detected pressure, if described first pressure-detecting device, 70 detected gaseous tensions are much smaller than described second pressure-detecting device, 80 detected gaseous tensions, obstruction occurred in the bottom blowing pipeline that then described controller 50 is judged between described first pressure-detecting device 70 and the described gas bag 30, and sent the bottom blowpipe road and stop up guard signal; If described first pressure-detecting device, 70 detected gaseous tensions approximate described second pressure-detecting device, 80 detected gaseous tensions, obstruction occurred in the bottom blowing pipeline of then described controller 50 described first pressure-detecting devices 70 of judgement away from a side (promptly between first pressure-detecting device 70 and the converter 100) of described gas bag 30, and sent the bottom blowpipe road and stop up guard signal.Thereby can make the staff learn obstruction has appearred in which side in the bottom blowing pipeline, help overhauling.Wherein said second pressure-detecting device 80 also can be pressure unit or pressure detector.
Can comprise a plurality of first pressure-detecting devices 70 and a plurality of second pressure-detecting device 80 in the described converter bottom blowing system 200, wherein, every the bottom blowing pipeline that is connected the air outlet place of gas bag 30 can comprise mutually placed in-line one first pressure-detecting device 70, variable valve 10, a under meter 20 and one second pressure-detecting device 80.For example see the embodiment of Fig. 2, described converter bottom blowing system 200 comprises the first pressure-detecting device 70-7n, variable valve 10-1n, under meter 20-2n, the second pressure-detecting device 70-7n, wherein n is the integer greater than zero, comprise respectively in every bottom blowing pipeline that one first pressure-detecting device, a variable valve, a under meter, second pressure-detecting device are connected on the place, air outlet of gas bag 30, each trip valve is connected the inlet mouth place of gas bag 30, and each trip valve is connected respectively to an air supply header.
Under the situation of all closing, there is not gas inflow bottom blowpipe road to cause occurring in the bottom blowing pipeline stopping up owing to all trip valves, according to converter bottom blowing system provided by the invention, described trip valve 40 is during at least two, and described controller 50 guarantees to have at least a trip valve 40 to be in full open position in described at least two trip valves 40.Promptly all trip valves can not be in complete off-position simultaneously, thus the blowing process under the control of controller, feed gases to converter 100, can feed gas in the non-blowing process, thereby avoid occurring in the converter bottom blowing system stopping up than low discharge.
Need to prove that the integral part in the converter bottom blowing system provided by the invention can be applied to converter equally and blow again in the steel-making converter systems such as system.Above description just the present invention is made explanations rather than limits of the present inventionly, modification and variation that any those skilled in that art make without creative work according to the present invention are included within protection scope of the present invention.
Claims (10)
1. a converter bottom blowing system (200), this converter bottom blowing system (200) comprising: gas bag (30), variable valve (10), under meter (20), and at least one trip valve (40), wherein said gas bag (30) is used for storage and transmits gas, each trip valve is connected in parallel on the inlet mouth place of described gas bag (30) by corresponding switching pipeline, described variable valve (10) and described under meter (20) are connected on the place, air outlet of described gas bag (30) by the bottom blowing pipeline, described under meter (20) is used to measure the gas flow at the place, air outlet of described gas bag (30), and described variable valve (10) is used to regulate the gas flow at the place, air outlet of described gas bag (30); It is characterized in that this system also comprises:
Controller (50), be electrically connected with described variable valve (10), described under meter (20), each trip valve (40), this controller (50) is used for controlling according to the gas supplying mode of storage in advance the opening and closing of each trip valve (40), obtain the gas flow at the place, air outlet of the described gas bag (30) that described under meter (20) measures, and described variable valve (10) is regulated according to described gas flow and described gas supplying mode.
2. converter bottom blowing system according to claim 1 (200), wherein, described gas supplying mode comprises the gas switching time in the blowing process and the gas supply intensity value of each time phase, described controller (50) converts described gas supply intensity value to the gaseous feed stream amount according to gas intensity-gas flow conversion formula, and by measured gas flow and described gaseous feed stream amount relatively come described variable valve (10) thus regulate gas flow in the control bottom blowing pipeline.
3. converter bottom blowing system according to claim 1 (200), wherein, this converter bottom blowing system (200) also comprises at least one limit test set, the number of described limit test set equates with the number of described trip valve (40), each limit test set is installed on the corresponding trip valve (40), be used to detect this corresponding trip valve (40) and whether be in complete opening or complete off-position, and be not to be in complete opening or to send the trip valve trouble signal fully during off-position at this corresponding trip valve (40).
4. converter bottom blowing system according to claim 1 (200), wherein, described controller also stores minimum gas flow in (50), the detected gas flow of described under meter (20) that obtains when described controller (50) sends bottom blowing line clogging guard signal during less than this minimum gas flow.
5. converter bottom blowing system according to claim 3 (200), wherein, the scope of described minimum gas flow is 30Nm
3/ h-50Nm
3/ h.
6. converter bottom blowing system according to claim 1 (200), wherein, this converter bottom blowing system (200) comprises a plurality of variable valve (10) and a plurality of under meter (20), each variable valve (10) and the place, air outlet that is connected in parallel on described gas bag (30) after each under meter (20) is connected by corresponding bottom blowing pipeline.
7. converter bottom blowing system according to claim 1 (200), wherein, this converter bottom blowing system (200) also comprises first pressure-detecting device (70), this first pressure-detecting device (70) is by bottom blowing pipeline and described variable valve (10), described under meter (20) is connected on the place, air outlet of gas bag (30), and be electrically connected with described controller (50), be used to detect the gaseous tension that first pressure-detecting device described in the bottom blowing pipeline (70) is located, and send described controller (50) to, also store first pressure-detecting device described in the bottom blowing pipeline (70) in the described controller (50) and locate corresponding setting pressure, if the detected pressure of described first pressure-detecting device (70) is greater than setting pressure, obstruction occurred in then described controller (50) the judgement bottom blowing pipeline, and sent the bottom blowpipe road and stop up guard signal.
8. converter bottom blowing system according to claim 7 (200), wherein, described first pressure-detecting device (70) is arranged in the bottom blowing pipeline between described variable valve (10) and the described under meter (20), perhaps is arranged in the bottom blowing pipeline of the either side of described variable valve (10) and described under meter (20) both sides.
9. according to claim 7 or 8 described converter bottom blowing systems (200), wherein, this converter bottom blowing system (200) also comprises second pressure-detecting device (80), this second pressure-detecting device (80) is arranged in the bottom blowing pipeline between first pressure-detecting device (70) and the described gas bag (30), be electrically connected with described controller (50), be used for detecting the gaseous tension that this second pressure-detecting device (80) of bottom blowing pipeline is located, and send described controller (50) to, described controller (50) compares detected gaseous tension of described second pressure-detecting device (80) and the detected pressure of described first pressure-detecting device (70), if the detected gaseous tension of described first pressure-detecting device (70) is much smaller than the detected gaseous tension of described second pressure-detecting device (80), obstruction occurred in the bottom blowing pipeline between then described controller (50) judgement described first pressure-detecting device (70) and the described gas bag (30), and sent the bottom blowpipe road and stop up guard signal; If the detected gaseous tension of described first pressure-detecting device (70) approximates the detected gaseous tension of described second pressure-detecting device (80), obstruction occurred in the bottom blowing pipeline of then described controller (50) judgement described first pressure-detecting device (70) away from a side of described gas bag (30), and sent the bottom blowpipe road and stop up guard signal.
10. converter bottom blowing system according to claim 1 (200), wherein, described trip valve (40) is during at least two, and described controller (50) guarantees to have at least a trip valve (40) to be in full open position in described at least two trip valves (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910254313 CN102094105B (en) | 2009-12-09 | 2009-12-09 | Bottom blowing system for converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910254313 CN102094105B (en) | 2009-12-09 | 2009-12-09 | Bottom blowing system for converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102094105A true CN102094105A (en) | 2011-06-15 |
| CN102094105B CN102094105B (en) | 2013-01-16 |
Family
ID=44127372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910254313 Expired - Fee Related CN102094105B (en) | 2009-12-09 | 2009-12-09 | Bottom blowing system for converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102094105B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109572947A (en) * | 2018-11-29 | 2019-04-05 | 浙江大学 | A kind of sea drift vessel for collecting refuse from open |
| CN110157848A (en) * | 2019-05-06 | 2019-08-23 | 山东钢铁集团有限公司 | A kind of bottom blowing flow dynamics control method of top and bottom combined blown converter |
| CN110408739A (en) * | 2019-07-22 | 2019-11-05 | 北京首钢股份有限公司 | A kind of bottom-blowing of converter method and device |
| CN113006885A (en) * | 2021-03-23 | 2021-06-22 | 攀钢集团西昌钢钒有限公司 | Constant-pressure operation control method for steam turbine generator unit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1796576A (en) * | 2004-12-27 | 2006-07-05 | 宝钢集团上海第一钢铁有限公司 | Method for maintaining converter |
| CN100371463C (en) * | 2005-07-22 | 2008-02-27 | 钢铁研究总院 | Combined-blowing converter bottom gas supply element blocking-preventing device and method |
| CN100443595C (en) * | 2006-09-26 | 2008-12-17 | 山西太钢不锈钢股份有限公司 | Switching method for feeding nitrogen and argon of reblowing converter bottom |
| CN201068461Y (en) * | 2007-06-15 | 2008-06-04 | 中国第一重型机械集团公司 | Stainless steel revolving furnace |
| CN201176446Y (en) * | 2008-04-09 | 2009-01-07 | 唐山建龙实业有限公司 | Bottom bowing layout structure for medium top-bottom combined blown converter |
-
2009
- 2009-12-09 CN CN 200910254313 patent/CN102094105B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109572947A (en) * | 2018-11-29 | 2019-04-05 | 浙江大学 | A kind of sea drift vessel for collecting refuse from open |
| CN109572947B (en) * | 2018-11-29 | 2023-11-14 | 浙江大学 | Sea floats refuse collection ship |
| CN110157848A (en) * | 2019-05-06 | 2019-08-23 | 山东钢铁集团有限公司 | A kind of bottom blowing flow dynamics control method of top and bottom combined blown converter |
| CN110408739A (en) * | 2019-07-22 | 2019-11-05 | 北京首钢股份有限公司 | A kind of bottom-blowing of converter method and device |
| CN110408739B (en) * | 2019-07-22 | 2022-01-14 | 北京首钢股份有限公司 | Converter bottom blowing method and device |
| CN113006885A (en) * | 2021-03-23 | 2021-06-22 | 攀钢集团西昌钢钒有限公司 | Constant-pressure operation control method for steam turbine generator unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102094105B (en) | 2013-01-16 |
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