CN201817509U - Converter coal gas dry-method dedusting system - Google Patents
Converter coal gas dry-method dedusting system Download PDFInfo
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- CN201817509U CN201817509U CN2010202755944U CN201020275594U CN201817509U CN 201817509 U CN201817509 U CN 201817509U CN 2010202755944 U CN2010202755944 U CN 2010202755944U CN 201020275594 U CN201020275594 U CN 201020275594U CN 201817509 U CN201817509 U CN 201817509U
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- gas
- converter
- coal gas
- cooling system
- dust
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Abstract
The utility model provides a converter coal gas dry-method dedusting system which comprises a coal gas cooling system and a deduster communicated with each other, wherein the inlet of the coal gas cooling system is connected to the converter, the deduster is connected to the inlet of a switching station by an induced draft fan, the outlet of the switching station is connected to a diffusing chimney and a coal gas cabinet, a rough dust collecting device is installed at the crook part at the tail end of the coal gas cooling system, and a fine dust collecting device is installed at the bottom of the deduster; rough and fine dust collected by the rough dust collecting device and the fine dust collecting device is briquetted into blocks by a dust briquetting device so as to be taken as raw material for steelmaking by the converter; and the coal gas cooling system is provided with a converter coal gas component analytical instrument, and a nitrogen injecting device is additionally arranged on the pipe section between the coal gas cooling system and the deduster. The possibility of leakage and explosion of the converter coal gas dry-method dedusting system is reduced, and the safety of the system is improved.
Description
Technical field
The utility model 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 in the utility model is: a kind of converter gas dry-dedusting system is provided, and the utility model 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 scheme that the utility model adopted 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.
Advantage of the present utility model: the utility model 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 utility model.
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 utility model 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 utility model 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 utility model 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 utility model better, below further set forth content of the present utility model.
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 utility model better, further illustrate content of the present utility model below in conjunction with embodiment, but content of the present utility model 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 (6)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202755944U CN201817509U (en) | 2010-07-30 | 2010-07-30 | Converter coal gas dry-method dedusting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202755944U CN201817509U (en) | 2010-07-30 | 2010-07-30 | Converter coal gas dry-method dedusting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201817509U true CN201817509U (en) | 2011-05-04 |
Family
ID=43915472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202755944U Expired - Fee Related CN201817509U (en) | 2010-07-30 | 2010-07-30 | Converter coal gas dry-method dedusting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201817509U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892343A (en) * | 2010-07-30 | 2010-11-24 | 中冶南方工程技术有限公司 | Converter gas dry-dedusting system and using method thereof |
| CN112430700A (en) * | 2020-10-20 | 2021-03-02 | 南京罕华流体技术有限公司 | Converter gas full recovery device and recovery method thereof |
-
2010
- 2010-07-30 CN CN2010202755944U patent/CN201817509U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892343A (en) * | 2010-07-30 | 2010-11-24 | 中冶南方工程技术有限公司 | Converter gas dry-dedusting system and using method thereof |
| CN112430700A (en) * | 2020-10-20 | 2021-03-02 | 南京罕华流体技术有限公司 | Converter gas full recovery device and recovery method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110504 Termination date: 20130730 |