CN101892343A - Converter gas dry-dedusting system and using method thereof - Google Patents
Converter gas dry-dedusting system and using method thereof Download PDFInfo
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- CN101892343A CN101892343A CN 201010240188 CN201010240188A CN101892343A CN 101892343 A CN101892343 A CN 101892343A CN 201010240188 CN201010240188 CN 201010240188 CN 201010240188 A CN201010240188 A CN 201010240188A CN 101892343 A CN101892343 A CN 101892343A
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Abstract
The invention discloses a converter gas dry-dedusting system and a using method thereof. The system comprises a gas cooling system and a deduster which are communicated, wherein an inlet of the gas cooling system is connected to a converter; the deduster is connected to the inlet of a switching station by a draught fan; an outlet of the switching station is connected to a diffusion chimney and a gas tank respectively; a coarse dust collection device is arranged at a banana-shaped curved part at the tail end of the gas cooling system; a fine dust collection device is arranged at the bottom of the deduster; coarse and fine dust collected by the coarse and fine dust collection devices is briquetted into a block by dust briquetting equipment as a steel-making raw material of the converter; the gas cooling system is provided with a converter gas composition analyzer; and a nitrogen spraying-in device is arranged on a pipe section between the gas cooling system and the deduster. The probability of explosion-release of the converter gas dry-dedusting system can be lowered, while security can be improved.
Description
Technical field
The present invention relates to converter gas dry-dedusting system.
Background technology
Converter generates a large amount of high-temperature flue gas in process of production, and wherein major ingredients is CO, CO
2, O
2, N
2With Ar etc., and the gas-entrained FeO, the Fe that go out
2O
3, CaO, SiO
2In dust, its total dustiness is 80～150g/Nm
3, must be with it cooling dedusting, the one ton of steel that blows can reclaim the coal gas of converter 80-120Nm that contains CO concentration 60%
3Converter coal gas purification and recovery system mainly are divided into now: gas dry-dedusting system and wet gas cleaning system.
Converter gas dry-dedusting system all has bigger superiority in economy and environmental protection.The major advantage that dry method is compared with wet method: the one, udst separation efficient height, the dust mass concentration is reduced to 10mg/Nm
3Below; The 2nd, this system all adopts dry process, does not have secondary pollution and sewage disposal, reclaims dust and can directly utilize, and has saved water consumption; The 3rd, system's resistance is decreased little, has reduced energy consumption; The 4th, system simplification, floor space is little, is convenient to administer and maintain.
Traditional converter gas dry-dedusting system is in coal gas is in the limits of explosion scope time, venting of dust explosion can take place in the electrostatic precipitator, usually little blast is released pressure of explosion by 6～8 explosion venting valves, often venting of dust explosion is disadvantageous to electrostatic precipitator, venting of dust explosion also can influence normal production efficiency simultaneously, is the gordian technique of converter gas dry-dedusting system so how to reduce or avoid the electrostatic precipitator venting of dust explosion.
Summary of the invention
Technical problem to be solved by this invention is: a kind of converter gas dry-dedusting system and using method thereof are provided, and the present invention can reduce the possibility of converter gas dry-dedusting system venting of dust explosion, improves the security of converter gas dry-dedusting system.
The technical solution adopted in the present invention is: converter gas dry-dedusting system, comprise the gas cooling system and the fly-ash separator that are connected, the inlet of gas cooling system is connected to converter, fly-ash separator is connected to the inlet of switching station by induced draft fan, the outlet of switching station is connected to respectively diffuses chimney and gas chamber, the afterbody banana-bends of gas cooling system is equipped with meal dirt collection device, the fine dust collection device is equipped with in the fly-ash separator bottom, slightly/that the fine dust collection device is collected is thick, fine dust is by dust briquetting equipment briquetting, as the converter steelmaking raw material, gas cooling system is provided with the coal gas of converter analytical instrument, and the pipeline section between gas cooling system and the fly-ash separator is set up the nitrogen jetting device.
The using method of converter gas dry-dedusting system: coal gas of converter is when the cooling system, and the coal gas of converter analytical instrument judges that coal gas whether in the limits of explosion scope, detects it simultaneously and whether reaches recovering condition; The coal gas that meets recovering condition is collected in the gas chamber successively by evaporative cooler, fly-ash separator, gas cooler cooling dedusting at last; The coal gas that does not meet recovering condition is successively by evaporative cooler, fly-ash separator cooling dedusting, switches to by switching station at last and diffuses chimney and light and diffuse; Be in the interior coal gas of huge explosion scope earlier by evaporative cooler cooling dedusting, spray into nitrogen by the pipeline of nitrogen jetting device between evaporative cooler and electrostatic precipitator again, the straying quatity of nitrogen is calculated by gas flow and oxygen level thereof, the setting point of nitrogen jetting device was determined by the time of response of gas flow rate and gas composition analytical system, to be in beyond the limits of explosion scope by the coal gas behind the nitrogen dilution, coal gas leads to electrostatic precipitator then, switches to by switching station and diffuses chimney and light and diffuse; If the power failure fault appears in induced draft fan in the converting process, then under the effect of high pressure nitrogen induction apparatus, coal gas is by after cooling system and the fly-ash separator cooling dedusting, switches to by switching station at last and diffuses chimney and light and diffuse.
Advantage of the present invention: the present invention can reduce the possibility of converter gas dry-dedusting system venting of dust explosion, improves the security of converter gas dry-dedusting system.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure, 1: converter; 2: the oxygen rifle; 3: gasification cooling flue; 4: steam pockets; 5: the gas composition analyser; 6: double-flow spray gun; 7: evaporative cooler; 8: meal dirt collection device; 9: electrostatic precipitator; 10: the fine dust collection device; 11: induced draft fan; 12: switching station; 13: diffuse chimney; 14: spray gun; 15: gas cooler; 16: gas chamber; 17: dust briquetting equipment; 18: the high pressure nitrogen induction apparatus; 19: the nitrogen jetting device.
Embodiment
As shown in Figure 1, converter gas dry-dedusting system, comprise the gas cooling system and the fly-ash separator that are connected, the inlet of gas cooling system is connected to converter 1, fly-ash separator is connected to the inlet of switching station 12 by induced draft fan 11, the outlet of switching station 12 is connected to respectively diffuses chimney 13 and gas chamber 16, meal dirt collection device 8 is equipped with in the tail end banana crook of gas cooling system, fine dust collection device 10 is equipped with in the fly-ash separator bottom, slightly/fine dust collection device 8,10 collect thick, fine dust is by dust briquetting equipment 17 briquettings, as the converter steelmaking raw material, gas cooling system is provided with coal gas of converter analytical instrument 5, and the pipeline section between gas cooling system and the fly-ash separator is set up nitrogen jetting device 19.The present invention can reduce the possibility of converter gas dry-dedusting system venting of dust explosion, improves the security of converter gas dry-dedusting system.
In preferred embodiment, gas cooling system comprises gasification cooling flue 3 and the evaporative cooler 7 that is connected, and described coal gas of converter analytical instrument 5 is arranged on the afterbody of gasification cooling flue 3.
In preferred embodiment, fly-ash separator adopts electrostatic precipitator 9.
In preferred embodiment, diffuse chimney 13 and be provided with induction apparatus, it can adopt high pressure nitrogen induction apparatus 18.
In preferred embodiment, also be connected to gas cooler 15 between switching station 12 and the gas chamber 16.
As shown in Figure 1, aerobic rifle 2 in the converter 1, the top of gasification cooling flue 3 is provided with steam pockets 4, and the ingress of evaporative cooler 7 is provided with double-flow spray gun 6, and gas cooler 15 is provided with spray gun 14.
The using method of converter gas dry-dedusting system: coal gas of converter is when the cooling system, and coal gas of converter analytical instrument 5 judges that coal gas whether in the limits of explosion scope, detects it simultaneously and whether reaches recovering condition; The coal gas that meets recovering condition is collected in the gas chamber 16 at last successively by evaporative cooler 7, fly-ash separator, gas cooler 15 cooling dedustings; The coal gas that does not meet recovering condition is successively by evaporative cooler 7, fly-ash separator cooling dedusting, switches to by switching station 12 at last and diffuses chimney 13 and light and diffuse; The coal gas that is in the huge explosion scope passes through evaporative cooler 7 cooling dedustings earlier, spray into nitrogen by the pipeline of nitrogen jetting device 19 between evaporative cooler 7 and electrostatic precipitator 9 again, the straying quatity of nitrogen is calculated by gas flow and oxygen level thereof, the setting point of nitrogen jetting device 19 was determined by the time of response of gas flow rate and gas composition analyser 5, to be in beyond the limits of explosion scope by the coal gas behind the nitrogen dilution, coal gas leads to electrostatic precipitator 9 then, switches to by switching station 12 and diffuses chimney 13 and light and diffuse; If the power failure fault appears in induced draft fan 11 in the converting process, then under the effect of high pressure nitrogen induction apparatus 18, coal gas is by after cooling system and the fly-ash separator cooling dedusting, switches to by switching station 12 at last and diffuses chimney 13 and light and diffuse.
Detailed operation process of the present invention mainly comprises following steps: 1) gasification cooling flue 3 is reduced to 800～1100 ℃ with coal gas for about 1600 ℃ from the converter mouth; 2) the gas composition analyser 5 that is contained in gasification cooling flue 3 tops is monitored gas composition in real time, judges whether it is in the limits of explosion scope; 3) coal gas further is reduced to 200～250 ℃ by evaporative cooler 7 temperature, and there is 30～40% cinder dirt to collect in evaporative cooler 7 bottoms, and the water and steam that double-flow spray gun 6 sprays into has reduced the ratio resistance of dust, makes the working range of its suitable electrostatic precipitator 9; 4) if coal gas is in the explosive range, then the pipeline between evaporative cooler 7 and electrostatic precipitator 9 sprays into nitrogen, the straying quatity of nitrogen is calculated by gas flow and oxygen level thereof, and the position that nitrogen sprays into was a little determined by the time of response of gas flow rate and gas composition analyser 5; 5) electrostatic precipitator 9 is reduced to 10mg/Nm with dust concentration
36) will reach the purification coal gas of recovering condition, it be imported gas cooler 15, it will be stored in gas chamber 16 after being chilled to 70～80 ℃ by switching station 12; 7) coal gas that will not reach recovering condition is lighted and is diffused by diffusing chimney 13.8) in the steelmaking process if induced draft fan 11 disorderly closedowns, then intrasystem coal gas is imported and diffuses chimney 13 by the high pressure nitrogen induction apparatus 18 that diffuses chimney 13 bottoms, burning is diffused.The present invention has reduced the venting of dust explosion number of times of converter gas dry-dedusting system by a simple method, has protected electrostatic precipitator 9.
In order to understand the present invention better, below further set forth content of the present invention.
1) coal gas of converter analytical instrument 5 is loaded on gasification cooling flue 3 afterbodys, and whether the composition that is used to detect coal gas is in the limits of explosion scope, detects coal gas simultaneously and whether reaches recovering condition.
2) if coal gas is in outside the limits of explosion scope, then coal gas is by evaporative cooler 7, electrostatic precipitator 9 cooling dedustings, if coal gas satisfies recovering condition simultaneously, then switching station 12 imports coal gas and is sent to gas chamber 16 after gas cooler 15 is chilled to 70～80 ℃; If coal gas does not satisfy recovering condition, then switching station 12 imports coal gas and diffuses chimney 13, lights and diffuses.
3) if coal gas is in the limits of explosion scope, then calculate the amount that needs add nitrogen according to coal gas total amount and coal gas oxygen level, thereby the nitrogen that sprays into will dilute coal gas of converter reduces to its oxygen level beyond the explosive range, thereby reduces or avoid electrostatic precipitator 9 ventings of dust explosion.Spray into setting velocity of flow decision in pipeline a little by time of lag of gas composition analyser 5 and gas.
4) if induced draft fan 11 breaks down in the converting process, then rifle is carried in converter 1 immediately, and the nitrogen induction apparatus 18 of the coal gas in the dust-removal system by diffusing chimney 13 bottoms lighted its emptying to diffuse.
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to following example.
Example 1: after converter 1 is promptly carried rifle, when descending rifle for the second time venting of dust explosion appears easily, as follows at the countermeasure step of situation:
1) gas composition analyser 5 detects coal gas and is in the explosive range, how much nitrogen calculates by gas composition and gas flow thereof needs concentration of oxygen to be diluted to beyond the limits of explosion scope that (the coal gas of converter limits of explosion has two: 1. CO%＞9%, O
2%＞6%; 2. H
2%＞3%, O
2%＞4%; More than be volume percent);
2) time of lag and the gas velocity of flow decision in pipeline according to gas composition analyser 5 sprays into a little, and be often that nitrogen jetting device 19 is far away apart from gas composition analyser 5, to guarantee nitrogen jetting device 19 arranged the enough reaction times;
3) coal gas after the dilution will in explosive range, then coal gas by the 9 cooling dedustings of evaporative cooler 7 and electrostatic precipitator after, lead by switching station 12 and to diffuse chimney 13 and light and diffuse;
Thus, the coal gas of converter that originally may blast in electrostatic precipitator 9 away between blast area, has been protected electrostatic precipitator 9 and whole coal gas of converter dust-removal system thereof by the nitrogen dilution effect.
Claims (7)
1. converter gas dry-dedusting system, comprise the gas cooling system and the fly-ash separator that are connected, the inlet of gas cooling system is connected to converter, fly-ash separator is connected to the inlet of switching station by induced draft fan, the outlet of switching station is connected to respectively diffuses chimney and gas chamber, meal dirt collection device is equipped with in the tail end banana crook of gas cooling system, the fine dust collection device is equipped with in the fly-ash separator bottom, slightly/that the fine dust collection device is collected is thick, fine dust is by dust briquetting equipment briquetting, as the converter steelmaking raw material, it is characterized in that: gas cooling system is provided with the coal gas of converter analytical instrument, and the pipeline section between gas cooling system and the fly-ash separator is set up the nitrogen jetting device.
2. dust-removal system according to claim 1 is characterized in that: gas cooling system comprises gasification cooling flue and the evaporative cooler that is connected, and described coal gas of converter analytical instrument is arranged on the afterbody of gasification cooling flue.
3. dust-removal system according to claim 1 is characterized in that: fly-ash separator adopts electrostatic precipitator.
4. dust-removal system according to claim 1 is characterized in that: diffuse chimney and be provided with induction apparatus.
5. dust-removal system according to claim 4 is characterized in that: induction apparatus adopts the high pressure nitrogen induction apparatus.
6. according to each described dust-removal system in the claim 1～5, it is characterized in that: also be connected to gas cooler between switching station and the gas chamber.
7. the using method of converter gas dry-dedusting system is characterized in that: coal gas of converter is during by cooling system, and the coal gas of converter analytical instrument judges that coal gas whether in the limits of explosion scope, detects it simultaneously and whether reaches recovering condition; The coal gas that meets recovering condition is collected in the gas chamber successively by evaporative cooler, fly-ash separator, gas cooler cooling dedusting at last; The coal gas that does not meet recovering condition is successively by evaporative cooler, fly-ash separator cooling dedusting, switches to by switching station at last and diffuses chimney and light and diffuse; Be in the interior coal gas of huge explosion scope earlier by evaporative cooler cooling dedusting, spray into nitrogen by the pipeline of nitrogen jetting device between evaporative cooler and electrostatic precipitator again, the straying quatity of nitrogen is calculated by gas flow and oxygen level thereof, the setting point of nitrogen jetting device was determined by the time of response of gas flow rate and gas composition analyser, to be in beyond the limits of explosion scope by the coal gas behind the nitrogen dilution, coal gas leads to electrostatic precipitator then, switches to by switching station and diffuses chimney and light and diffuse; If the power failure fault appears in induced draft fan in the converting process, then under the effect of high pressure nitrogen induction apparatus, coal gas is by after cooling system and the fly-ash separator cooling dedusting, switches to by switching station at last and diffuses chimney and light and diffuse.
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|---|---|---|---|
| CN 201010240188 CN101892343A (en) | 2010-07-30 | 2010-07-30 | Converter gas dry-dedusting system and using method thereof |
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|---|---|---|---|
| CN 201010240188 CN101892343A (en) | 2010-07-30 | 2010-07-30 | Converter gas dry-dedusting system and using method thereof |
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| CN 201010240188 Pending CN101892343A (en) | 2010-07-30 | 2010-07-30 | Converter gas dry-dedusting system and using method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102363826A (en) * | 2011-10-31 | 2012-02-29 | 中冶南方工程技术有限公司 | Gas cooling equipment for removing dust of converter gas in dry method |
| CN102382932A (en) * | 2011-10-31 | 2012-03-21 | 中冶南方工程技术有限公司 | Gas cooling technology used for dry dedusting for converter gas |
| CN102563337A (en) * | 2010-12-22 | 2012-07-11 | 北京博鹏北科科技有限公司 | Gas unloading system and gas unloading method |
| CN102912073A (en) * | 2012-11-08 | 2013-02-06 | 攀钢集团研究院有限公司 | Method for preventing vanadium extraction converter dry dedusting system from vented explosion |
| CN102912074A (en) * | 2012-11-08 | 2013-02-06 | 攀钢集团研究院有限公司 | Method for preventing dry process dust removal system from exhausting yellow smoke |
| CN103333986A (en) * | 2013-06-28 | 2013-10-02 | 中冶南方工程技术有限公司 | Converter coal gas dry dedusting and cinder pneumatic transmission system |
| CN105154613A (en) * | 2015-10-30 | 2015-12-16 | 太仓东能环保设备有限公司 | Converter dry-dedusting technology |
| CN106123619A (en) * | 2016-07-12 | 2016-11-16 | 中国石油化工股份有限公司 | The monitoring method of industrial furnace fuel accumulation |
| CN108265154A (en) * | 2018-03-04 | 2018-07-10 | 北京首钢国际工程技术有限公司 | A kind of automatic control system for preventing converter smelting coal gas venting of dust explosion |
| CN108265152A (en) * | 2016-12-30 | 2018-07-10 | 北京凯德恒源科技发展有限公司 | Pneumatic steelmaking coal gas complete recovering technique and its control method based on nitrogen compensation |
| CN109929962A (en) * | 2019-04-24 | 2019-06-25 | 广州华鑫工程技术有限公司 | The ultra-clean cleaner of high temperature resistant and dust removal method for coal gas of steel-smelting revolving furnace |
| CN111549199A (en) * | 2020-04-14 | 2020-08-18 | 新兴铸管股份有限公司 | Converter gas recovery system and recovery process |
| CN111593163A (en) * | 2020-04-15 | 2020-08-28 | 浙江大维高新技术股份有限公司 | Converter gas flue gas conditioning system and flue gas conditioning method thereof |
| CN114879771A (en) * | 2022-05-11 | 2022-08-09 | 铜陵求精机械有限公司 | Monitoring control system of explosion venting valve in high-temperature environment |
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| CN102563337A (en) * | 2010-12-22 | 2012-07-11 | 北京博鹏北科科技有限公司 | Gas unloading system and gas unloading method |
| CN102382932B (en) * | 2011-10-31 | 2013-05-01 | 中冶南方工程技术有限公司 | Gas cooling technology used for dry dedusting for converter gas |
| CN102382932A (en) * | 2011-10-31 | 2012-03-21 | 中冶南方工程技术有限公司 | Gas cooling technology used for dry dedusting for converter gas |
| CN102363826A (en) * | 2011-10-31 | 2012-02-29 | 中冶南方工程技术有限公司 | Gas cooling equipment for removing dust of converter gas in dry method |
| CN102912073B (en) * | 2012-11-08 | 2014-08-06 | 攀钢集团研究院有限公司 | Method for preventing vanadium extraction converter dry dedusting system from vented explosion |
| CN102912074A (en) * | 2012-11-08 | 2013-02-06 | 攀钢集团研究院有限公司 | Method for preventing dry process dust removal system from exhausting yellow smoke |
| CN102912074B (en) * | 2012-11-08 | 2014-05-21 | 攀钢集团研究院有限公司 | Method for preventing dry process dust removal system from exhausting yellow smoke |
| CN102912073A (en) * | 2012-11-08 | 2013-02-06 | 攀钢集团研究院有限公司 | Method for preventing vanadium extraction converter dry dedusting system from vented explosion |
| CN103333986A (en) * | 2013-06-28 | 2013-10-02 | 中冶南方工程技术有限公司 | Converter coal gas dry dedusting and cinder pneumatic transmission system |
| CN103333986B (en) * | 2013-06-28 | 2014-12-17 | 中冶南方工程技术有限公司 | Converter coal gas dry dedusting and cinder pneumatic transmission system |
| CN105154613A (en) * | 2015-10-30 | 2015-12-16 | 太仓东能环保设备有限公司 | Converter dry-dedusting technology |
| CN106123619A (en) * | 2016-07-12 | 2016-11-16 | 中国石油化工股份有限公司 | The monitoring method of industrial furnace fuel accumulation |
| CN106123619B (en) * | 2016-07-12 | 2018-05-18 | 中国石油化工股份有限公司 | The monitoring method of industrial furnace fuel accumulation |
| CN108265152A (en) * | 2016-12-30 | 2018-07-10 | 北京凯德恒源科技发展有限公司 | Pneumatic steelmaking coal gas complete recovering technique and its control method based on nitrogen compensation |
| CN108265154A (en) * | 2018-03-04 | 2018-07-10 | 北京首钢国际工程技术有限公司 | A kind of automatic control system for preventing converter smelting coal gas venting of dust explosion |
| CN109929962A (en) * | 2019-04-24 | 2019-06-25 | 广州华鑫工程技术有限公司 | The ultra-clean cleaner of high temperature resistant and dust removal method for coal gas of steel-smelting revolving furnace |
| CN111549199A (en) * | 2020-04-14 | 2020-08-18 | 新兴铸管股份有限公司 | Converter gas recovery system and recovery process |
| CN111593163A (en) * | 2020-04-15 | 2020-08-28 | 浙江大维高新技术股份有限公司 | Converter gas flue gas conditioning system and flue gas conditioning method thereof |
| CN114879771A (en) * | 2022-05-11 | 2022-08-09 | 铜陵求精机械有限公司 | Monitoring control system of explosion venting valve in high-temperature environment |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination |