CN1896287A - Bagged dust-collecting rcovery system by rotary-furnace coal-gas dry pulse - Google Patents
Bagged dust-collecting rcovery system by rotary-furnace coal-gas dry pulse Download PDFInfo
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- CN1896287A CN1896287A CNA2006100880736A CN200610088073A CN1896287A CN 1896287 A CN1896287 A CN 1896287A CN A2006100880736 A CNA2006100880736 A CN A2006100880736A CN 200610088073 A CN200610088073 A CN 200610088073A CN 1896287 A CN1896287 A CN 1896287A
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Abstract
The present invention belongs to the metallurgical technology and relates to a dry pulse bag dust-collecting and recycling system of converter gas that cleans the converter gas in detail. In the invention the converter is connected to the vaporizing cooling flue via movable fume cover, the speed adjustable fan is connected to the gas converting station, the vaporizing cooling flue is connected to the evaporative cooler, the evaporative cooler is connected to the sealed positive displacement pulse bag filter, the sealed positive displacement pulse bag filter is connected to the speed adjustable fan via a fume. The dynamic baffle valve is positioned in the fume connecting the sealed positive displacement pulse bag filter and the speed adjustable fan. The invention has a simple and tight structure. Because the bag filter has a large adaptive capacity to the changes of temperature and humidity after vaporizing cooling, this system avoids the adverse effect of specific resistance variety on electrostatic precipitation so as to avoid the explosion of electrostatic precipitator caused by and the disqualification of gas recovery caused by emission changes.
Description
Technical field
The present invention relates to a kind of bagged dust-collecting rcovery system by rotary-furnace coal-gas dry pulse, specifically coal gas of converter is purified, belong to the metallurgy industry technical field.
Background technology
Converter produces a large amount of carbon monoxide (CO) and is commonly called as " coal gas of converter " in the process that oxygen blast is smelted, this initial coal gas of converter claims " raw gas ", and it contains a large amount of iron dust containings, and dust content is up to 20～25g/Nm
3, can not directly be used as other purposes, must dust be dropped to national standard 10mg/Nm through after the dedusting
3Below could use.Converter gas dry method removes dust recovery system all based on the LT method both at home and abroad at present, it mainly adopts converter to connect gasification cooling flue by movable gas hood, gasification cooling flue connects apparatus for vapour-cooling, apparatus for vapour-cooling is by the pipe connection electrostatic precipitator, electrostatic precipitator is by the pipe connection adjustable speed fan, adjustable speed fan is by pipe connection coal gas switching station, and the coal gas switching station connects gas cooler respectively and diffuses chimney by pipeline.Adjustable speed fan is connected with frequency transformer.Operational path is reclaimed in its dedusting: coal gas of converter → gasification cooling flue → evaporative cooler → electrostatic precipitator → fan station (frequency transformer) → coal gas switching station etc.
Because apparatus for vapour-cooling is had relatively high expectations to the control of high-temperature flue-gas, has deviation promptly can influence the normal operation of follow-up electrostatic precipitator slightly; The cooling temperature of vapourizing unit directly influences the ratio resistance of flue gas, and the temperature high specific resistance rises, and is not easy charged, when the low then humidity height of temperature, descend than resistance, can cause pole plate absorption and corona blocking, thereby influence dust contained flue gas concentration and produce explosion hazard, the system that influences normally moves; The main cause that electrostatic precipitator often sets off an explosion is its negative electrode prickle point discharge, easily produces electrical spark, and when oxygen level surpassed 2%, coal gas was met naked light and then produced blast, and influence is produced; Adjustable speed fan operation control is closely related with the flue-gas temperature variation, and temperature variation and vaporization cooling situation, as temperature, the closely related direct ratio resistance characteristic that influences dust of humidity; Because the inertia of adjustable speed fan is bigger, thereby easily producing the excessive system that causes, its operation speed governing fluctuates back and forth, influence is operation normally; The fan speed regulation air quantity is big, and then gas quality reduces, and the too high potential safety hazard that causes of coal gas oxygen level; The too small then coal gas of air quantity fire door is excessive, influences secondary dust discharge etc.
Summary of the invention
The object of the invention is to overcome above-mentioned weak point, thereby provide a kind of fly-ash separator that the cooled temperature that gasifies, humidity are changed subject range greatly, avoided than the disadvantageous effect of resistance change electrostatic precipitator, also avoided electrostatic precipitator because corona blocking sparking and polar curve discharge set off an explosion, and the underproof drawback of emission concentration variable effect coal-gas recovering quality; Energy is safe, reliable, the bagged dust-collecting rcovery system by rotary-furnace coal-gas dry pulse of steady running.
Main solution of the present invention is achieved in that
The present invention mainly adopts converter 1 to connect gasification cooling flue 3 by movable gas hood 2, gasification cooling flue 3 connects evaporative cooler 4, feature is that evaporative cooler 4 is connected with sealed volume formula pulse bag type dust collector 5 by flue, sealed volume formula pulse bag type dust collector 5 connects adjustable speed fan 7 by flue, adjustable speed fan 7 connects coal gas switching station 9 by flue, coal gas switching station 9 connects gas cooler 11 by flue, diffuse chimney 10 and be connected with coal gas switching station 9, adjustable speed fan 7 connects frequency transformer 8.
The present invention is provided with dynamic flapper valve 6 on the flue between sealed volume formula pulse bag type dust collector 5 and the adjustable speed fan 7.
Compared with the prior art the present invention has the following advantages:
The present invention is simple, compact and reasonable for structure; Thereby sack cleaner does not have static bloom or discharge to avoid the potential safety hazard that often sets off an explosion, and guarantees ordinary production; Sack cleaner changes subject range greatly to the cooled temperature that gasifies, humidity, avoided the disadvantageous effect that electrostatic precipitation risen than resistance change, thereby avoided electrostatic precipitator, and the underproof drawback of emission concentration variable effect coal-gas recovering quality because corona blocking sparking and polar curve discharge set off an explosion; Because big, so reduced the difficulty of blower fan and Controlling System, the easy handling management to the modification scope of temperature, humidity; The thermal adaptation scope is big, and the gas temperature height is selected high temperature resistance filtration material for use, and gas temperature is low selects for use resistive connection to reveal anti-hydrolysis-type filtrate; The stopping property of sealed volume formula pulse bag type dust collector has guaranteed oxygen level less than 2%, avoids producing blast; Dynamically plate washer regulation and control converter mouth elementary errors is pressed, the inertial fluctuation when having avoided transferring blower fan.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Embodiment during following the present invention incites somebody to action in conjunction with the accompanying drawings is further described:
The present invention mainly by converter 1, movable gas hood 2, gasification cooling flue 3, evaporative cooler 4, sealed volume formula pulse bag type dust collector 5, dynamically flapper valve 6, adjustable speed fan 7, frequency transformer 8, coal gas switching station 9, diffuse chimney 10, gas cooler 11 etc. and form.
The present invention mainly adopts converter 1 to connect gasification cooling flue 3 by movable gas hood 2, gasification cooling flue 3 connects evaporative cooler 4, evaporative cooler 4 is connected with sealed volume formula pulse bag type dust collector 5 by flue, and sealed volume formula pulse bag type dust collector 5 connects adjustable speed fan 7 by flue.Dynamic flapper valve 6 is set on the flue between sealed volume formula pulse bag type dust collector 5 and the adjustable speed fan 7, and dynamically flapper valve 6 is controlled by the servo control mechanism dynamic feedback, and adopts nitrogen seal device, prevents air admission.Sealed volume formula pulse bag type dust collector 5 sealed volume are that mainly each Link Port limit all adopts mechanical strong sealing device and nitrogen seal device, and the equipment outer air of stopping enters.Its pulser adopts nitrogen or pressing gas winding-up.Pulse bag type dust collector dust settling pocket filtrate adopts resistive connection dew, anti-hydrolysis, anti-oxidant, normal temperature or high temperature resistance filtration material to make.Adjustable speed fan 7 connects coal gas switching station 9 by flue, and coal gas switching station 9 connects gas cooler 11 by flue, diffuses chimney 10 and is connected with coal gas switching station 9, and adjustable speed fan 7 connects frequency transformer 8.
Principle of work of the present invention and technical process:
Converter 1 coal gas of the present invention enters gasification cooling flue 3 by movable gas hood 2, by gasification cooling flue 3 flue gas is sent into evaporative cooler 4, after gasification cooling flue 3 and evaporative cooler 4 coolings, coal gas is cooled to below 200 ℃ from 1600 ℃ converter temperature out, enter sealed volume formula pulse bag type dust collector 5 and purify, the gas dust content after the purification drops to national standard 10mg/m
3Below, enter gas chamber by coal gas switching station 9; After dust on the filter bag passes through nitrogen or pressing gas winding-up, fall into fly-ash separator ash storehouse, dust stratification is sent into concentrated grey storehouse or is unloaded grey car outward transport by defeated ash and ash-discharging device in the grey storehouse; Reclaiming coal gas amount and oxygen level need press when regulating and can control by the adjusting that is located at the dynamic flapper valve 6 on the flue by the fire door elementary errors; When being lower than 30%, gas content can to diffusing chimney 10 coal gas directly be lighted discharging by bypass.When being higher than 30%, gas content can enter the gas cooler 11 last gas chambers that feed by coal gas switching station 9.
Claims (2)
1, a kind of bagged dust-collecting rcovery system by rotary-furnace coal-gas dry pulse, adopt converter (1) to connect gasification cooling flue (3) by movable gas hood (2), gasification cooling flue (3) connects evaporative cooler (4), feature is that evaporative cooler (4) is connected with sealed volume formula pulse bag type dust collector (5) by flue, sealed volume formula pulse bag type dust collector (5) connects adjustable speed fan (7) by flue, adjustable speed fan (7) connects coal gas switching station (9) by flue, coal gas switching station (9) connects gas cooler (11) by flue, diffuse chimney (10) and be connected with coal gas switching station (9), adjustable speed fan (7) connects frequency transformer (8).
2, bagged dust-collecting rcovery system by rotary-furnace coal-gas dry pulse according to claim 1 is characterized in that on the flue between described sealed volume formula pulse bag type dust collector (5) and the adjustable speed fan (7) dynamic flapper valve (6) being set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100880736A CN1896287A (en) | 2006-06-22 | 2006-06-22 | Bagged dust-collecting rcovery system by rotary-furnace coal-gas dry pulse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100880736A CN1896287A (en) | 2006-06-22 | 2006-06-22 | Bagged dust-collecting rcovery system by rotary-furnace coal-gas dry pulse |
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| Publication Number | Publication Date |
|---|---|
| CN1896287A true CN1896287A (en) | 2007-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2006100880736A Pending CN1896287A (en) | 2006-06-22 | 2006-06-22 | Bagged dust-collecting rcovery system by rotary-furnace coal-gas dry pulse |
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| CN (1) | CN1896287A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071281A (en) * | 2011-02-25 | 2011-05-25 | 辽宁环宇环保技术有限公司 | Converter gas dry method bag type recovering and purifying system and process |
| CN102337375A (en) * | 2011-10-31 | 2012-02-01 | 中冶南方工程技术有限公司 | Dry dedusting system for primary flue gas from vanadium extraction converter |
| CN102373312A (en) * | 2011-10-31 | 2012-03-14 | 中冶南方工程技术有限公司 | Primary fume dry method dedusting system of vanadium recovery converter |
| CN102899444A (en) * | 2012-10-26 | 2013-01-30 | 通化市五一环保科技股份有限公司 | System and method for treating converter flue gas |
| CN103255260A (en) * | 2013-05-28 | 2013-08-21 | 新兴河北工程技术有限公司 | Converter flue gas purifying and waste heat recovering system and bag-type dust removing technology |
| CN105969933A (en) * | 2016-06-16 | 2016-09-28 | 北京博鹏北科节能环保股份有限公司 | Device and method for controlling converter mouth micro-differential pressure in converter flue gas dry dedusting system |
| CN109913614A (en) * | 2019-02-01 | 2019-06-21 | 无锡红旗除尘设备有限公司 | A kind of minimum discharge cleaning treatment system of dry method dust release flue gas of converter |
-
2006
- 2006-06-22 CN CNA2006100880736A patent/CN1896287A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071281A (en) * | 2011-02-25 | 2011-05-25 | 辽宁环宇环保技术有限公司 | Converter gas dry method bag type recovering and purifying system and process |
| CN102337375A (en) * | 2011-10-31 | 2012-02-01 | 中冶南方工程技术有限公司 | Dry dedusting system for primary flue gas from vanadium extraction converter |
| CN102373312A (en) * | 2011-10-31 | 2012-03-14 | 中冶南方工程技术有限公司 | Primary fume dry method dedusting system of vanadium recovery converter |
| CN102337375B (en) * | 2011-10-31 | 2013-02-06 | 中冶南方工程技术有限公司 | Dry dedusting system for primary flue gas from vanadium extraction converter |
| CN102373312B (en) * | 2011-10-31 | 2013-06-19 | 中冶南方工程技术有限公司 | Primary fume dry method dedusting system of vanadium recovery converter |
| CN102899444A (en) * | 2012-10-26 | 2013-01-30 | 通化市五一环保科技股份有限公司 | System and method for treating converter flue gas |
| CN103255260A (en) * | 2013-05-28 | 2013-08-21 | 新兴河北工程技术有限公司 | Converter flue gas purifying and waste heat recovering system and bag-type dust removing technology |
| CN105969933A (en) * | 2016-06-16 | 2016-09-28 | 北京博鹏北科节能环保股份有限公司 | Device and method for controlling converter mouth micro-differential pressure in converter flue gas dry dedusting system |
| CN105969933B (en) * | 2016-06-16 | 2017-11-21 | 北京博鹏北科节能环保股份有限公司 | Micro-differential pressure control device and control method in converter gas dry-dedusting system |
| CN109913614A (en) * | 2019-02-01 | 2019-06-21 | 无锡红旗除尘设备有限公司 | A kind of minimum discharge cleaning treatment system of dry method dust release flue gas of converter |
| CN109913614B (en) * | 2019-02-01 | 2023-11-07 | 无锡红旗除尘设备有限公司 | Ultralow emission purifying treatment system for converter primary dry dedusting and diffusing flue gas |
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