CN102580437A - Converter primary flue gas dual-tower purification method and converter primary flue gas purification tower - Google Patents
Converter primary flue gas dual-tower purification method and converter primary flue gas purification tower Download PDFInfo
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- CN102580437A CN102580437A CN2012100397924A CN201210039792A CN102580437A CN 102580437 A CN102580437 A CN 102580437A CN 2012100397924 A CN2012100397924 A CN 2012100397924A CN 201210039792 A CN201210039792 A CN 201210039792A CN 102580437 A CN102580437 A CN 102580437A
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Abstract
The invention discloses a converter primary flue gas dual-tower purification method, which aims to solve the problem of poor purification effects and the like in the conventional method. The converter primary flue gas dual-tower purification method comprises the following steps of: initially cooling; cooling again; dedusting; adjusting air flow; purifying; dehydrating; detecting the quality of gas; recovering qualified gas; and igniting unqualified gas, and diffusing. The invention also discloses a converter primary flue gas purification tower. The purification tower comprises a vaporization cooling flue, evaporation cooling and washing towers, a long neck circular seam venturi pipe, a dehydrating tower and a fan which are sequentially connected with one another, wherein a connecting short pipe is connected between the evaporation washing tower and the long neck circular seam venturi pipe; an overflow water seal is arranged on the evaporation washing tower; and the overflow water seal, the evaporation washing tower and the long neck circular seam venturi pipe form an integrated purification tower body. The converter primary flue gas dual-tower purification method and the converter primary flue gas purification tower are suitable for the field of purification of converter flue gas, have good effects, and are low in water consumption, wash working capacity and maintenance working capacity.
Description
Technical field
The present invention relates to a kind of converter flue gas double tower purification method and column for smoke purification of converter.
Background technology
Most of full wet method " OG " system that adopts of gas cleaning dust pelletizing system of converter current.High-temperature flue gas (1200～1400 ℃) tentatively cools off through gasification cooling flue, and flue-gas temperature reduces to～and 900 ℃.Then through a literary composition (rectangle is adjustable overflow Venturi tube) carry out saturatedly cooling, thick dedusting, temperature is reduced to about 72 ℃.Cooled smoke gets into two literary compositions (the linear adjustable aditus laryngis Venturi tube of rectangle) and carries out smart dedusting after the dehydration of gravity dehydration device; The flue gases that go out two literary compositions are through the dehydration of band water fender elbow separator, dewater after pipeline is delivered to centrifugal blower through the baffle plate dehydrator more again, deliver to blowdown stack and igniting is diffused by the coal-gas recovering air blast.
During coal-gas recovering, coal gas of converter boosts to three-way switch valve through the coal-gas recovering air blast.When flue gas met recovering condition, flue gas switched to the water seal non-return valve by triple valve, and through being sent to the dry type converter gas cabinet after water seal non-return valve and the gas holder import water seal, the booster fan by the coal gas pressurizing point is sent to each user with the coal gas pressurization then; When flue gas did not meet recovering condition, flue gas switched to through triple valve (by-passing valve) and diffuses chimney, diffused through the blowdown stack igniting then.
Use flue gas purification system flow process of converter of OG method following:
Linear adjustable aditus laryngis Venturi tube (two literary compositions of the adjustable overflow Venturi tube of petticoat pipe → gasification cooling flue → rectangle (the literary composition) → gravity dehydration device → tedge → 180 ° bend pipe of converter gas → movable gas hood → fixedly → rectangle; R.D type aditus laryngis, hydraulic servo device) → be with water fender elbow separator → baffle plate dehydrator → compound baffle plate dehydrator → yard piping → coal-gas recovering air blast → three-way switch valve → flue gas to diffuse tower
Coal-gas recovering air blast → three-way switch valve → water seal non-return valve → V-type water seal → dry type converter gas cabinet
Mainly contain following problem in the above flue gas processing procedure: 1) linear adjustable aditus laryngis Venturi tube (two literary compositions, R.D type aditus laryngis, hydraulic servo device) the cleaning system effect of adjustable overflow Venturi tube of rectangle and rectangle is relatively poor, generally at 100mg/m
3About.2) the linear adjustable aditus laryngis Venturi tube water consumption of adjustable overflow Venturi tube of rectangle and rectangle is higher, and the operating cost of water treatment simultaneously is higher.3) band water fender elbow separator, baffle plate dehydrator and compound baffle plate dehydrator are because of frequent dust stratification, and the system overhaul workload is big.4) gravity dehydration device in the system, 180 ° of bend pipes, elbow separator etc. locate to exist the flue gas dead angle.Potential safety hazard is arranged, need establish explosion venting valve.
Summary of the invention
In order to overcome above-mentioned defective, the present invention provides a flue gas double tower of the converter purification method of the few and good purification of a kind of water consumption.
For achieving the above object, on the one hand, the present invention provides a flue gas double tower of a kind of converter purification method, and said method comprises the steps:
Preliminary cooling;
Cooling again;
Dedusting;
Regulate tolerance;
Purify;
Dehydration;
Detect gaseous mass, qualified Gas Recovery, defective gas igniting is diffused.
On the other hand; The present invention provides a kind of converter a column for smoke purification; Said purifying column comprises gasification cooling flue, evaporation scrubbing tower, long-neck circumferential weld Venturi tube, dehydrating tower and the blower fan that connects successively; Between said evaporation scrubbing tower and said long-neck circumferential weld Venturi tube, connect short tube, said evaporation scrubbing tower be provided with the overflow water seal; Said overflow water seal, said evaporation scrubbing tower and said long-neck circumferential weld Venturi tube are formed integral type purifying column body.
Particularly, the water inlet pipe that connects said overflow water seal adopts the flat water pipe of tangent line.
Particularly, nozzle is set at interval in the said evaporation scrubbing tower, nozzle is set at the end of said gasification cooling flue.
Particularly, said nozzle is a conical hollow.
Particularly, the said nozzle that is positioned at the upper end is sprayed water downwards, and the said nozzle that is positioned at the lower end is water spray upwards, and the said nozzle that is positioned at the middle part is to both sides water spray up and down.
Particularly, the drainpipe of the drainpipe of said evaporation scrubbing tower and said long-neck circumferential weld Venturi tube divides two-layer layout up and down, and the end of two drainpipes all is arranged in the water seal water trap.
Particularly, said long-neck circumferential weld Venturi tube comprises housing, and the downward nozzle of water spraying direction is set on the top of said housing, and said long-neck circumferential weld Venturi tube also comprises liftable heavily stone roller, casing, hydraulic servomechanism and pull bar.
The dust removal step of a flue gas double tower of converter of the present invention purification method has substituted thick dust removal step and smart dust removal step in the existing method, and dehydration has substituted dehydration and the dehydration again in the existing method.Reduced the step of purification process, better effects if, water consumption is lower.
In column for smoke purification of converter of the present invention, evaporation scrubbing tower and long-neck circumferential weld Venturi tube are formed integral type purifying column body, and flue gas cool-down is effective in the evaporation scrubbing tower, and water consumption is low, thick good dedusting effect.A part of steam gets in the long-neck circumferential weld Venturi tube in the evaporation scrubbing tower, has increased the aqueous vapor disturbance, reduced the water consumption of long-neck circumferential weld Venturi tube, and dust removing effects improves greatly.
Airflow smooth in the system of a column for smoke purification of converter of the present invention does not have the vortex, brief, the safety of system, and whole system need not established explosion-proof valve, safeguards that required workload is few.
Description of drawings
Fig. 1 is the flow chart of a flue gas double tower of converter of the present invention purification method.
Fig. 2 is a column for smoke purification preferred embodiment of a converter of the present invention structural representation.
The specific embodiment
Below in conjunction with Figure of description and embodiment the present invention is done detailed description.
As shown in Figure 1, a flue gas double tower of converter of the present invention purification method comprises the steps:
1. preliminary cooling.1200～1400 ℃ high-temperature flue gas tentatively are cooled to about 900 ℃ through gasification cooling flue.
2. cooling again.Through the pervaporation scrubbing tower flue gas is reduced to about 71 ℃ by 900 ℃.
3. dedusting.Flue gas during nozzle location, is handled real dedusting through the water purification of atomizing particle shape in the pervaporation scrubbing tower.
4. adjusting tolerance.Through the position of liftable heavy stone roller in the control long-neck circumferential weld Venturi tube, realized reclaiming the control of coal gas amount.
5. purify.The top of long-neck circumferential weld Venturi tube is provided with water injection system, and current spray into aditus laryngis, flue through nozzle.
6. dehydration.Getting into dehydrating tower behind the flue gas process long-neck circumferential weld Venturi tube dewaters.
7. detection gaseous mass, qualified Gas Recovery, defective gas igniting is diffused.
As shown in Figure 2; Column for smoke purification of converter of the present invention comprises cooling stack 11, evaporation scrubbing tower 2, long-neck circumferential weld Venturi tube 3, dehydrating tower 9 and the fan connecting tube 10 that connects successively, realizes each step in a flue gas double tower of the converter of the present invention purification method through said structure.The flue gas that from converter 14, sends gets into purifying column through cooling stack 11.
Between evaporation scrubbing tower 2 and long-neck circumferential weld Venturi tube 3, use short tube 4 to connect; A part of steam in the evaporation scrubbing tower 2 can get in the long-neck circumferential weld Venturi tube 3 through this short tube 4; Strengthened the flow-disturbing effect, all had greatly improved aspect mixing quality and the polymerization time two.And can fully separate superfine dust, improved efficiency of dust collection, and efficiency of dust collection is stable.
Nozzle is set at interval, to carrying out dedusting in the evaporation scrubbing tower 2 through the inner flue gas of pervaporation scrubbing tower.Size according to the evaporation scrubbing tower is different, and 5-8 layer nozzle can be set in tower.In order to make dust removing effects better, the nozzle 51 that is arranged on the upper end spray water downwards, and the nozzle 53 that is arranged on the lower end is water spray upwards, and the nozzle 52 that is arranged on the middle part is sprayed water to both sides up and down.
Through this single, double, make the flue gas in the evaporation scrubbing tower 2 reach thorough turbulent flow to the water spray mode that combines.Single, double nozzle all adopts atomizing particle thin especially, at high temperature can evaporate rapidly.Because the water evaporation latent heat is 10 times of saturated cooling sensible heat, the correspondingly required water yield is exactly the seldom part of saturated cooling; Atomizing particle speed reaches as high as 40 meter per seconds, is realizing the transpiration-cooled while also having very high dust removing effects.
Do wet interface in order to prevent that gasification cooling flue 11 and overflow water seal 1 interface from damaging and producing, nozzle is set at the end of cooling stack.
The spray area of said nozzle is to be combined by the hollow conical ring of a series of one or several continuous concentric circles; This nozzle unique design structure can make the jet expansion size than low discharge reach the general big liquid communication of nozzle several times cross section; Owing to there is not core arrangement; Therefore make the passage of nozzle more unimpeded, farthest reduce choking phenomenon, source quality is not had special demands.
Through the single, double arrangement of nozzles of above-mentioned multilayer, form gas-liquid-solid three-phase intense mixing, mass transfer in the evaporation scrubbing tower.Gas-liquid contact time is long, relative velocity is high, reduce air film and the resistance of liquid film, the motive force that dirt is caught in raising.And the liquid ejection efficiency of conical hollow nozzle is high, and under equal injection conditions, the pressure of water pump can be lower, plays the effect of energy efficiency.
The drainpipe 6 of evaporation scrubbing tower 2 and the drainpipe of long-neck circumferential weld Venturi tube two-layer layout about in the of 6 minutes, the end of two drainpipes all is arranged in the water seal water trap 12.The end of water seal water trap 12 connects sump 13.Separate the structure that afterwards gathers so earlier makes in the water outlet contained coal gas manage through the upper strata returning in the tower, so both guarantee that draining is smooth and easy, prevent gas leakage again.
Long-neck circumferential weld Venturi tube 3 comprises housing, and the downward nozzle of water spraying direction 7 is set on the top of said housing, and said long-neck circumferential weld Venturi tube also comprises liftable heavily stone roller, casing, hydraulic servomechanism 31 and pull bar.The structure of long-neck circumferential weld Venturi tube 3 is identical with prior art.Long-neck circumferential weld Venturi tube rear portion vapour-liquid ratio is big, and does not have bend pipe, so do not need water flushing and manual regular cleaning, has reduced operating cost.The water supply of long-neck circumferential weld Venturi tube is to spray into aditus laryngis, flue through the top water injection system through nozzle.Liftable is heavily cut or polish jade with an emery wheel the control recovery coal gas amount that is used for, and the size of aditus laryngis is to press automatic instrument(s) control hydraulic servomechanism to regulate according to the converter mouth elementary errors.
This long-neck circumferential weld Venturi tube adjusting function is good, has reduced output, has reduced operating cost.And purification efficiency is high, satisfies the new discharge standard of country, promptly diffuses flue gas average emission concentration≤50mg/Nm
3
Column for smoke purification of converter of the present invention is than existing system water saving 40%, and also reduction greatly of turbid circulating water amount processing, has reduced operating cost simultaneously.The flue gas purification system air-flow is smooth and easy especially, does not have the vortex, brief, the safety of system, and whole system need not established explosion-proof valve, and maintenance workload is few.
Long-neck circumferential weld Venturi tube vapour in column for smoke purification of converter of the present invention, liquor ratio are big, and the back do not have the setting of bend pipe, thus do not need the water flushing with the manual regular cleaning, keep in repair.Practice thrift cost of labor and time, and then increased output.Simultaneously, this long-neck circumferential weld Venturi tube liquid gas flow-disturbing is strong especially, and clean-up effect is well more a lot of than conventional " OG " system, can reach 20mg/Nm
3, be controlled at 50mg/Nm at ordinary times
3About, obviously be superior to existing " OG " system.
More than; Be merely preferred embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claim was defined.
Claims (8)
1. a flue gas double tower of converter purification method is characterized in that said method comprises the steps:
Preliminary cooling;
Cooling again;
Dedusting;
Regulate tolerance;
Purify;
Dehydration;
Detect gaseous mass, qualified Gas Recovery, defective gas igniting is diffused.
2. column for smoke purification of a converter; Said purifying column comprises gasification cooling flue, evaporative cooling scrubbing tower, long-neck circumferential weld Venturi tube, dehydrating tower and the blower fan that connects successively; It is characterized in that; Between said evaporation scrubbing tower and said long-neck circumferential weld Venturi tube, connect short tube, said evaporation scrubbing tower be provided with the overflow water seal; Said overflow water seal, said evaporation scrubbing tower and said long-neck circumferential weld Venturi tube are formed integral type purifying column body.
3. column for smoke purification of converter according to claim 2 is characterized in that: the water inlet pipe that connects said overflow water seal adopts the flat water pipe of tangent line.
4. column for smoke purification of converter according to claim 2 is characterized in that: nozzle is set in the said evaporation scrubbing tower at interval, at the end of said gasification cooling flue nozzle is set.
5. column for smoke purification of converter according to claim 4 is characterized in that: said nozzle is a conical hollow.
6. column for smoke purification of converter according to claim 4 is characterized in that: the said nozzle that is positioned at the upper end is sprayed water downwards, and the said nozzle that is positioned at the lower end is water spray upwards, and the said nozzle that is positioned at the middle part is to both sides water spray up and down.
7. column for smoke purification of converter according to claim 2 is characterized in that: the drainpipe of the drainpipe of said evaporation scrubbing tower and said long-neck circumferential weld Venturi tube divides two-layer layout up and down, and the end of two drainpipes all is arranged in the water seal water trap.
8. column for smoke purification of converter according to claim 2; It is characterized in that: said long-neck circumferential weld Venturi tube comprises housing; The downward nozzle of water spraying direction is set on the top of said housing, and said long-neck circumferential weld Venturi tube also comprises liftable heavily stone roller, casing, hydraulic servomechanism and pull bar.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100397924A CN102580437A (en) | 2012-02-21 | 2012-02-21 | Converter primary flue gas dual-tower purification method and converter primary flue gas purification tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100397924A CN102580437A (en) | 2012-02-21 | 2012-02-21 | Converter primary flue gas dual-tower purification method and converter primary flue gas purification tower |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103252150A (en) * | 2013-05-27 | 2013-08-21 | 芜湖华洁环保设备有限公司 | Integral washing tower |
| CN103276140A (en) * | 2013-05-27 | 2013-09-04 | 芜湖华洁环保设备有限公司 | High-efficiency twin-tower system |
| CN103320568A (en) * | 2013-06-25 | 2013-09-25 | 中国重型机械研究院股份公司 | Multifunctional intelligent spray dust collection cooler |
| CN103331068A (en) * | 2013-05-31 | 2013-10-02 | 芜湖华洁环保设备有限公司 | Annular gap long-neck venturi tube |
| CN103757176A (en) * | 2014-01-26 | 2014-04-30 | 江苏博际环境工程科技有限公司 | Primary flue gas-coal gas dedusting and deep purification system of converter |
| CN106268127A (en) * | 2016-08-12 | 2017-01-04 | 攀钢集团西昌钢钒有限公司 | V2o5reduction kiln reduction exhaust gas recovery system and recovery process |
| CN107090536A (en) * | 2017-06-26 | 2017-08-25 | 辽宁基伊能源科技有限公司 | Dry and wet mixing method converter gas one-time dedusting cleaning system |
| CN108842029A (en) * | 2018-06-21 | 2018-11-20 | 中国科学院力学研究所 | A kind of converter gas dry type dust waste-heat recovery device and method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252150A (en) * | 2013-05-27 | 2013-08-21 | 芜湖华洁环保设备有限公司 | Integral washing tower |
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| CN103757176B (en) * | 2014-01-26 | 2015-09-30 | 江苏博际环境工程科技有限公司 | A kind of converter flue gas coal gas dust removal and advanced purification system |
| CN106268127A (en) * | 2016-08-12 | 2017-01-04 | 攀钢集团西昌钢钒有限公司 | V2o5reduction kiln reduction exhaust gas recovery system and recovery process |
| CN106268127B (en) * | 2016-08-12 | 2018-08-03 | 攀钢集团西昌钢钒有限公司 | V2O5Reduction kiln restores exhaust gas recovery system and recovery process |
| CN107090536A (en) * | 2017-06-26 | 2017-08-25 | 辽宁基伊能源科技有限公司 | Dry and wet mixing method converter gas one-time dedusting cleaning system |
| CN108842029A (en) * | 2018-06-21 | 2018-11-20 | 中国科学院力学研究所 | A kind of converter gas dry type dust waste-heat recovery device and method |
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Application publication date: 20120718 |