CN201817508U - Dry-method dust palletizing system for converter coal gas - Google Patents
Dry-method dust palletizing system for converter coal gas Download PDFInfo
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- CN201817508U CN201817508U CN2010202755802U CN201020275580U CN201817508U CN 201817508 U CN201817508 U CN 201817508U CN 2010202755802 U CN2010202755802 U CN 2010202755802U CN 201020275580 U CN201020275580 U CN 201020275580U CN 201817508 U CN201817508 U CN 201817508U
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- dust
- gas
- converter
- coal gas
- cooling system
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Abstract
The utility model provides a dry-method dust palletizing system for converter coal gas, which comprises a coal gas cooling system and a dust catcher which are communicated, wherein an inlet of the coal gas cooling system is connected with a converter; the dust catcher is connected with an inlet of a switching station through a draught fan; an outlet of the switching station is connected with a diffusing chimney and a gas chamber; a thick dust collector is arranged at the banana bending part of the tail end of the coal gas cooling system; a fine dust collector is arranged at the bottom of the dust catcher; thick dust and fine dust collected by the thick dust collector and the fine dust collector are pressed into blocks through a device for pressing dust into blocks to serve as materials for the converter to produce steel; a converter coal gas component analyzer is arranged on the cooling system; and a plurality of nitrogen nozzles are uniformly arranged on the inlet of the coal gas cooling system. The dry-method dust palletizing system for converter coal gas can reduce explosion venting possibility so as to improve the safety of the dry-method dust palletizing system.
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, N2 and 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: 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, thereby improves the security of converter gas dry-dedusting system.
The technical scheme that the utility model adopted is: converter gas dry-dedusting system comprises gas cooling system and the fly-ash separator that is 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, cooling system is provided with the coal gas of converter analytical instrument, the uniform a plurality of nitrogen nozzles in gas cooling system ingress.
Advantage of the present utility model: by adding nitrogen coal gas is diluted, reduced the venting of dust explosion probability 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 nozzle.
Embodiment
As shown in Figure 1, converter gas dry-dedusting system comprises gas cooling system and the fly-ash separator that is 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, cooling system is provided with coal gas of converter analytical instrument 5, the uniform a plurality of nitrogen nozzles 19 in gas cooling system ingress.
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.
In preferred embodiment, induction apparatus adopts 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: before converter 1 begins steel-making or re-blows, by nitrogen nozzle 19 nitrogen-blows, and the flow of regulating induced draft fan 11 makes it equal the nitrogen amount that sprays into from nitrogen nozzle 19, thereby reaches the purpose that empties the air in the whole dust-removal system; When converter 1 begins blowing or re-blows, reduce the nitrogen flow of nitrogen nozzle 19, continue to blow about 1min; The coal gas that converter 1 produces is through gas cooling system, electrostatic precipitator 9 cooling dedustings, and analyze it by gas composition analyser 5 and whether reach the coal-gas recovering condition, enter switching station 12 through induced draft fan 11 again, the coal gas that meets recovering condition, switch to gas cooler 15 through switching station 12, collect at last in the gas chamber 16; The coal gas that does not meet recovering condition switches to through switching station and diffuses chimney 13 and light and diffuse; Induced draft fan 11 has a power failure or breaks down in converting process, oxygen rifle 2 is mentioned in converter 1 immediately, stop oxygen blast, need to open the nitrogen nozzle 19 of gasification cooling flue 3 ingress simultaneously, the high pressure nitrogen induction apparatus 18 by diffusing chimney 13 bottoms is lighted coal gas to diffuse from being diffused chimney 13.
The working process of converter gas dry-dedusting system of the present utility model is: the nitrogen nozzle 19 by gasification cooling flue 3 ingress before the beginning of 1) blowing or re-blow sprays into nitrogen, adjust induced draft fan 11 flows and make it identical, continue 10～20 seconds with the nitrogen amount that sprays into; 2) begin blowing or when re-blowing, the flow that reduces nitrogen nozzle 19 continues to blow about 1min, thereby reduce the flow of introducing wild wind, reach the purpose of minimizing system venting of dust explosion; 3) gasification cooling flue 3 is reduced to 800～1100 ℃ with coal gas for about 1600 ℃ from the converter mouth; 4) coal gas further is reduced to 200～250 ℃ by evaporative cooler 7 temperature, and there is 30～40% cinder dirt to collect in the bottom of evaporative cooler 7, 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; 5) electrostatic precipitator 9 is reduced to 10mg/Nm with dust concentration
36) one-tenth of gas composition analyser 5 detection coal gas is grouped into, and will reach the purification coal gas of recovering condition, by switching station 12 it is imported and after gas cooler 15 is chilled to 70～80 ℃ it is stored in gas chamber 16; 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 by the high pressure nitrogen induction apparatus 18 that diffuses chimney 13 bottoms chimney 13 burnings being diffused in intrasystem coal gas importing diffuses; need to open the nitrogen nozzle 19 of gasification cooling flue 3 ingress simultaneously; with the mixing of isolated coal gas and wild wind, thus the venting of dust explosion probability of minimizing electrostatic precipitator 9.The utility model has reduced the venting of dust explosion probability of converter gas dry-dedusting system by a simple method, has protected electrostatic precipitator and whole converter gas dry-dedusting system.
In order to understand the utility model better, below sets forth in detail content of the present utility model.
1) the uniform several nitrogen nozzles 19 in gasification cooling flue 3 ingress, begin steel-making or re-blow before by nitrogen nozzle 19 nitrogen-blows, and make its nitrogen amount that equals to spray into, thereby reach the purpose that empties the air in the dust-removal system by the flow of regulating induced draft fan 11;
2) converter 1 begins blowing or when re-blowing, reduces the nitrogen flow of nitrogen nozzle 19, continues to blow about 1min, thereby reduces the influence of introducing wild wind, has reduced system's venting of dust explosion probability;
3) raw gas is by gasification cooling flue 3, 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.
4) induced draft fan 11 has a power failure or breaks down in converting process, rifle is carried in converter 1 immediately, high pressure nitrogen induction apparatus 18 by diffusing chimney 13 bottoms is lighted coal gas to diffuse from being diffused chimney 13, need to open the nitrogen nozzle 19 of gasification cooling flue 3 ingress simultaneously, with the mixing of isolated coal gas and wild wind, thus the venting of dust explosion probability of minimizing electrostatic precipitator 9.
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.
Embodiment 1: the converter 1 beginning oxygen blast or the process of re-blowing, and step is as follows:
1) before 2 oxygen blast of oxygen rifle, opens nitrogen nozzle 19 winding-ups 10～20s;
2) oxygen rifle 2 beginning oxygen blast, nitrogen nozzle 19 reduces the nitrogen flushing amount gradually, continues 1min;
3) gas composition analyser 5 detects coal gas and whether reaches recovering condition, the coal gas that reaches condition by cooling, dedusting after, import gas coolers 15 by switching station 12, then it is collected gas chamber 16;
4) do not reach the coal gas of recovering condition, import by switching station 12 and diffuse chimney 13 and light and diffuse.
Thus,,, reduce the number of times of converter gas dry-dedusting system venting of dust explosion, and can stop to take place in the electrostatic precipitator 9 huge explosion by spraying into the nitrogen dilution mixed gas in air and coal gas transitory stage.
Embodiment 2: the countermeasure of converter 1 induced draft fan 11 disorderly closedowns in converting process, and step is as follows:
1) induced draft fan 11 disorderly closedowns, converter gas dry-dedusting system send the signal of promptly mentioning oxygen rifle 2 for converter 1, stop oxygen blast;
2) open nitrogen nozzle 19, reduce wild wind introducing amount.
3) switching station 12 switches to fast and diffuses chimney 13 sides, opens high pressure nitrogen induction apparatus 18 simultaneously;
4) high pressure nitrogen induction apparatus 18 is closed after opening 3min, closes nitrogen nozzle 19 simultaneously.
Thus, even under the situation that induced draft fan 11 breaks down,, can guarantee that also venting of dust explosion does not take place converter gas dry-dedusting system by the suction function of high pressure nitrogen induction apparatus 18 and the diluting effect of nitrogen nozzle 19.
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 (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, that 10) collects is thick, fine dust is by dust briquetting equipment (17) briquetting, as the converter steelmaking raw material, it is characterized in that: cooling system is provided with coal gas of converter analytical instrument (5), the uniform a plurality of nitrogen nozzles in gas cooling system ingress (19).
2. dust-removal system according to claim 1 is characterized in that: 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).
3. dust-removal system according to claim 1 is characterized in that: fly-ash separator adopts electrostatic precipitator (9).
4. dust-removal system according to claim 1 is characterized in that: diffuse chimney (13) and be provided with induction apparatus.
5. dust-removal system according to claim 4 is characterized in that: induction apparatus adopts high pressure nitrogen induction apparatus (18).
6. according to each described dust-removal system in the claim 1～5, it is characterized in that: also be connected to gas cooler (15) between switching station (12) and the gas chamber (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202755802U CN201817508U (en) | 2010-07-30 | 2010-07-30 | Dry-method dust palletizing system for converter coal gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202755802U CN201817508U (en) | 2010-07-30 | 2010-07-30 | Dry-method dust palletizing system for converter coal gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201817508U true CN201817508U (en) | 2011-05-04 |
Family
ID=43915471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202755802U Expired - Fee Related CN201817508U (en) | 2010-07-30 | 2010-07-30 | Dry-method dust palletizing system for converter coal gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201817508U (en) |
-
2010
- 2010-07-30 CN CN2010202755802U patent/CN201817508U/en not_active Expired - Fee Related
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Legal Events
| 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 |