CN202786303U - Dry-wet mixed dust removal system for converter gas - Google Patents
Dry-wet mixed dust removal system for converter gas Download PDFInfo
- Publication number
- CN202786303U CN202786303U CN2012203914025U CN201220391402U CN202786303U CN 202786303 U CN202786303 U CN 202786303U CN 2012203914025 U CN2012203914025 U CN 2012203914025U CN 201220391402 U CN201220391402 U CN 201220391402U CN 202786303 U CN202786303 U CN 202786303U
- Authority
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- China
- Prior art keywords
- tower
- converter
- wet mixed
- dust removal
- coal gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000428 dust Substances 0.000 title abstract description 30
- 239000007921 spray Substances 0.000 claims abstract description 31
- 238000001816 cooling Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000005373 pervaporation Methods 0.000 claims abstract description 22
- 238000004880 explosion Methods 0.000 claims abstract description 6
- 239000003034 coal gas Substances 0.000 claims description 27
- 239000003818 cinder Substances 0.000 claims description 18
- 241000234295 Musa Species 0.000 claims description 13
- 235000018290 Musa x paradisiaca Nutrition 0.000 claims description 13
- 238000002309 gasification Methods 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 238000013022 venting Methods 0.000 claims description 4
- 239000000443 aerosol Substances 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 16
- 239000000498 cooling water Substances 0.000 abstract description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 6
- 230000018044 dehydration Effects 0.000 abstract description 6
- 238000006297 dehydration reaction Methods 0.000 abstract description 6
- 239000003546 flue gas Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 230000008016 vaporization Effects 0.000 abstract 2
- 238000009834 vaporization Methods 0.000 abstract 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000005068 transpiration Effects 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Chimneys And Flues (AREA)
Abstract
The utility model relates to a dry-wet mixed dust removal system for converter gas, wherein a vaporization cooling flue is arranged above a converter, and the dust removal system comprises a pervaporation tower, a cooling tower, a circumferential weld venturi tube and a cyclone spray gun dehydrator which are sequentially connected with the vaporization cooling flue; the inlet of the pervaporation tower is connected with the evaporative cooling flueThe high temperature compensator of (1). The dry-wet mixed type dust removal system for the converter gas adopts the pervaporation tower to cool the converter gas in a spray complete evaporative cooling way, thereby reducing the consumption of circulating cooling water; the circular seam adjustable throat venturi is used as secondary dust removal equipment, so that the dust removal efficiency of the converter flue gas is improved, the safety problem of electric dust removal explosion can be avoided, and the system is safer and more reliable; the cyclone spray gun dehydrator is used as dehydration equipment, so that the efficiency of removing mechanical water and fine dust is improved; the dust removal system can ensure that the dust concentration of the diffused flue gas is 30mg/Nm3In the following, a good environmental protection effect is achieved.
Description
Technical field
The utility model is about the dust collecting process of kind of steel-making converter and equipment, relates in particular to a kind of coal gas of converter dry-wet mixed type dust-removing system.
Background technology
Oxygen converter steelmaking adopts oxygen blast to smelt, and in converting process, can produce the high-temperature gas that contains volume of smoke and CO, and smoke content is up to 100~150g/Nm
3, temperature is up to 1450 ℃, and therefore, the rear dedusting that must cool first is called for short converter coal gas purification.At present, both at home and abroad the converter coal gas purification technology mainly contains two kinds: the one, and extensive adopted " OG " wet method (Japanese circular seam Venturi tube dust-removal system); The 2nd, the dry method take " LT " (the strange dry electric precipitation in German Shandong system) as representative.
Wet method " OG " system common technology flow process is:
Above-mentioned " OG " wet method exists that quantity of circulating water is large, system's power consumption is high, the dust discharge index (≤80mg/Nm3) defective such as higher; And " LT " although dry method improved efficiency of dust collection, reduced system resistance and decrease, have water saving power saving, advantage that efficiency of dust collection is high, but also there is obvious deficiency in " LT " dry dedusting technology: operation of equipment control difficulty is large, operation and maintenance cost is high, and there is certain potential safety hazard in system, has microexplosion to occur during electric precipitator.
Thus, the inventor relies on experience and the practice of being engaged in for many years relevant industries, proposes a kind of coal gas of converter dry-wet mixed type dust-removing system, to overcome the defective of prior art.
The utility model content
The purpose of this utility model is to provide a kind of coal gas of converter dry-wet mixed type dust-removing system, can effectively eliminate discharge microexplosion hidden danger, improves traveling comfort, safety and reliability, has the characteristics of water saving power saving, and can reduce running cost.
The purpose of this utility model is to realize like this, a kind of coal gas of converter dry-wet mixed type dust-removing system, described converter top is provided with gasification cooling flue, and described dust-removal system comprises pervaporation tower, temperature-reducing tower, circular seam Venturi tube and the cyclone spray gun type dehydrator that is linked in sequence in gasification cooling flue; The entrance of described pervaporation tower is provided with the high-temperature compensator that is connected with gasification cooling flue.
In a preferred embodiments of the present utility model, be provided with aerosol spray gun and supporting mist cooling setting device in the described pervaporation tower, described pervaporation tower bottom is provided with the banana bend pipe and is arranged on the interior built-in cinder conveyer of banana bend pipe; Described banana bend pipe is communicated with the temperature-reducing tower bottom.
In a preferred embodiments of the present utility model, described banana bend pipe below is provided with the cinder e Foerderanlage; This cinder e Foerderanlage comprises scraper ash-transmission machine, cinder storehouse, push-pull valve and two flap valve.
In a preferred embodiments of the present utility model, described circular seam Venturi tube is enterprising formula circular seam Venturi tube, and the import of described circular seam Venturi tube is communicated with the temperature-reducing tower top by cleaning shaft; The aditus laryngis of described circular seam Venturi tube is provided with along the dress weight, and top is provided with hydraulic servo lifting mechanism and supporting Hydraulic Station.
In a preferred embodiments of the present utility model, the top in the described cleaning shaft is provided with coal gas spring self-closing type explosion venting device.
In a preferred embodiments of the present utility model, described cyclone spray gun type dehydrator is spraying and the dehydration of whirlwind two-stage, and its inside is provided with spray pistol and fixed centrifugal impeller.
In a preferred embodiments of the present utility model, the water drain joint sealing that has from washing function is installed respectively in the bottom of described temperature-reducing tower, circular seam Venturi tube and cyclone spray gun type dehydrator.
From the above mentioned, coal gas of converter dry-wet mixed type dust-removing of the present utility model system adopts the pervaporation tower to cool off coal gas of converter by the mode of the complete transpiration cooling cooling of spraying, and has reduced the consumption of recirculated cooling water; Adopt circumferential weld adjustable throat inlet Venturi meter as two-stage dust removal equipment, improved the converter gas efficiency of dust collection, and can avoid occuring the safety problem of electric precipitation blast, make system more safe and reliable; Adopt cyclone spray gun type dehydrator as dehydration equipment, make to remove mechanical water and the raising of smart efficiency of dust collection; This dust-removal system can guarantee to diffuse exhaust gas dust concentration at 30mg/Nm
3Below, reach good environment protecting.
Description of drawings
The following drawings only is intended to the utility model done and schematically illustrates and explain, does not limit scope of the present utility model.Wherein:
Fig. 1: be the structural representation of the utility model coal gas of converter dry-wet mixed type dust-removing system.
Drawing reference numeral:
1-pervaporation tower;
The 11-cooling water inlet;
12-steam (or nitrogen) entrance;
13-banana bend pipe;
The 2-temperature-reducing tower;
The 21-entrance of cooling water;
The 3-circular seam Venturi tube;
The 31-aditus laryngis;
The 32-weight;
33-hydraulic servo lifting mechanism and supporting Hydraulic Station;
The 34-entrance of cooling water;
The 4-cyclone spray gun type dehydrator;
The 41-spray pistol;
The fixed centrifugal impeller of 42-;
The 43-inlet mouth;
The 5-high-temperature compensator;
The 6-cleaning shaft;
61-spring self-closing type explosion venting device;
7-cinder e Foerderanlage;
71-scraper ash-transmission machine;
72-cinder storehouse;
The 73-push-pull valve;
The two flap valves of 74-;
8-water drain joint sealing;
The 9-converter;
The 91-gasification cooling flue;
Embodiment
Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast description of drawings embodiment of the present utility model.
As shown in Figure 1, the utility model proposes a kind of coal gas of converter dry-wet mixed type dust-removing system 100, described converter 9 tops are provided with gasification cooling flue 91, and described dust-removal system 100 comprises pervaporation tower 1, temperature-reducing tower 2, circular seam Venturi tube 3 and the cyclone spray gun type dehydrator 4 that is linked in sequence in gasification cooling flue 91; The inlet portion of described pervaporation tower 1 is provided with the high-temperature compensator 5 that is connected with gasification cooling flue 91, and this high-temperature compensator 5 can the absorption portion thermal expansion.
From the above mentioned, coal gas of converter dry-wet mixed type dust-removing of the present utility model system adopts the pervaporation tower to cool off coal gas of converter by the mode of the complete transpiration cooling cooling of spraying, and has reduced the consumption of recirculated cooling water; Adopt circumferential weld adjustable throat inlet Venturi meter as two-stage dust removal equipment, improved the converter gas efficiency of dust collection, and can avoid occuring the safety problem of electric precipitation blast, make system more safe and reliable; Adopt cyclone spray gun type dehydrator as dehydration equipment, make to remove mechanical water and the raising of smart efficiency of dust collection; This dust-removal system can guarantee to diffuse exhaust gas dust concentration at 30mg/Nm
3Below, reach good environment protecting.
Further, in the present embodiment, be provided with aerosol spray gun and supporting mist cooling setting device in the described pervaporation tower 1, include cooling water inlet 11 and steam (or nitrogen) entrance 12; Described pervaporation tower 1 bottom is provided with banana bend pipe 13 and is arranged on built-in cinder conveyer in the banana bend pipe 13; Described banana bend pipe 13 is communicated with temperature-reducing tower 2 bottoms; The top of described temperature-reducing tower 2 is communicated with the import of circular seam Venturi tube 3 by a cleaning shaft 6; Temperature-reducing tower 2 is provided with entrance of cooling water 21;
Described banana bend pipe 13 belows are provided with cinder e Foerderanlage 7, and this cinder e Foerderanlage 7 comprises scraper ash-transmission machine 71, cinder storehouse 72 and is arranged on push-pull valve 73 and two flap valve 74 between described scraper ash-transmission machine 71 and the cinder storehouse 72.
In the present embodiment, described circular seam Venturi tube 3 is enterprising formula circular seam Venturi tube, and the aditus laryngis 31 of described circular seam Venturi tube 3 is provided with along dress weight 32, and top is provided with hydraulic servo lifting mechanism and supporting Hydraulic Station 33; Described weight 32 is conical in shape, and described weight 32 can move up and down by the control of hydraulic servo lifting mechanism and supporting Hydraulic Station 33, adjusts the circulation area between aditus laryngis 31 and the weight 32, and then improves efficiency of dust collection.Described aditus laryngis 31 positions are provided with entrance of cooling water 34.
Further, as shown in Figure 1, in the present embodiment, described cyclone spray gun type dehydrator 4 is spraying and the dehydration of whirlwind two-stage, and its inside is provided with spray pistol 41 and fixed centrifugal impeller 42.The inlet mouth 43 of described cyclone spray gun type dehydrator 4 bottoms is communicated with by the bottom of pipeline with circular seam Venturi tube 3.
In the present embodiment, the water drain joint sealing 8 that has from washing function is installed respectively in the bottom of described temperature-reducing tower 2, circular seam Venturi tube 3 and cyclone spray gun type dehydrator 4.Top in the described cleaning shaft 6 is provided with coal gas spring self-closing type explosion venting device 61.
The converter gas of 1450~1500 ℃ of high temperature collecting from converter 9 fire doors, at first enter gasification cooling flue 91, after being cooled to 900~1000 ℃, high-temperature flue gas enters pervaporation tower 1 through high-temperature compensator 5, converter gas is cooled to 200~300 ℃ by the complete transpiration cooling of atomized water that spray gun sprays into, then send into recirculated water that temperature-reducing tower 2 is injected into further after the cooling by pipeline, converter gas enters circumferential weld adjustable throat inlet Venturi meter 3 from the top collapsible tube, after mixing with the water that following current sprays into, passes through at a high speed converter gas circumferential weld aditus laryngis 31, thereby the dust in the flue gas is separated, converter gas after the purification flows out from the bottom convergent divergent channel of circular seam Venturi tube 3, tangentially enter cyclone spray gun type dehydrator 4, after the mode that adopts spray pistol capture drop and impeller cyclone to combine fully removes the simultaneously further smart dedusting of mechanical water of carrying under one's arms in the flue gas, be sent to induced draft fan through pipeline, defective flue gas is sent to the chimney burning and diffuses, and qualified coal gas is sent to gas chamber by pipeline and stores.
Dry ash under the pervaporation tower removes is discharged by the built-in scrapper conveyor of the banana bend pipe of tower bottom, sends into cinder storehouse 72 by chain type cinder conveyer 71, regularly recycling.After wet ash under circumferential weld adjustable throat inlet Venturi meter 3 removes enters water drain joint sealing 8 with water in dust removal, be sent to the turbid circulating water treatment facility by overhead sump and separate rear briquetting recovery.
The utility model compared with prior art has following beneficial effect:
(1) having cancelled traditional spray column relies on a large amount of water sprays to come the mode of cooling down high-temperature coal gas of converter, adopt the pervaporation tower to cool off coal gas of converter by the mode of the complete transpiration cooling cooling of spraying, take full advantage of evaporation of water latent heat and sensible heat, and significantly having reduced the consumption of recirculated cooling water, the water saving power saving effect is good.
(2) pervaporation tower bottom not only makes things convenient for and recycles the cinder that primary dust removing gets off, and alleviated the load of turbid circulating water treatment system for draining ash, has reduced the running cost of turbid circulating water treatment system.
(3) adopt circumferential weld adjustable throat inlet Venturi meter (patent No. ZL 01 2 74734.3) as two-stage dust removal equipment, not only the converter gas efficiency of dust collection is high, and does not have electric precipitation explosion safety problem, and system is more safe and reliable.
(4) adopt cyclone spray gun type dehydrator (patent No. ZL201020253454.7) as dehydration equipment, it removes mechanical water and smart efficiency of dust collection is high, greatly reduce blower fan and be stained with ash and remove greatly dynamically balanced probability, prolonged the impeller cleaning cycle, reduced the blower fan maintenance cost.
(5) this coal gas of converter dry-wet mixed type dust-removing of employing system can guarantee to diffuse exhaust gas dust concentration at 30mg/Nm
3Below, reach good environment protecting.
The above only is the schematic embodiment of the utility model, is not to limit scope of the present utility model.Any those skilled in the art, the equivalent variations of having done under the prerequisite that does not break away from design of the present utility model and principle and modification all should belong to the scope that the utility model is protected.
Claims (7)
1. coal gas of converter dry-wet mixed type dust-removing system, described converter top is provided with gasification cooling flue, and it is characterized in that: described dust-removal system comprises pervaporation tower, temperature-reducing tower, circular seam Venturi tube and the cyclone spray gun type dehydrator that is linked in sequence in gasification cooling flue; The entrance of described pervaporation tower is provided with the high-temperature compensator that is connected with gasification cooling flue.
2. coal gas of converter dry-wet mixed type dust-removing as claimed in claim 1 system, it is characterized in that: be provided with aerosol spray gun and supporting mist cooling setting device in the described pervaporation tower, described pervaporation tower bottom is provided with the banana bend pipe and is arranged on the interior built-in cinder conveyer of banana bend pipe; Described banana bend pipe is communicated with the temperature-reducing tower bottom.
3. coal gas of converter dry-wet mixed type dust-removing as claimed in claim 2 system, it is characterized in that: described banana bend pipe below is provided with the cinder e Foerderanlage; This cinder e Foerderanlage comprises scraper ash-transmission machine, cinder storehouse, push-pull valve and two flap valve.
4. coal gas of converter dry-wet mixed type dust-removing as claimed in claim 1 system, it is characterized in that: described circular seam Venturi tube is enterprising formula circular seam Venturi tube, and the import of described circular seam Venturi tube is communicated with the temperature-reducing tower top by cleaning shaft; The aditus laryngis of described circular seam Venturi tube is provided with along the dress weight, and top is provided with hydraulic servo lifting mechanism and supporting Hydraulic Station.
5. coal gas of converter dry-wet mixed type dust-removing as claimed in claim 4 system, it is characterized in that: the top in the described cleaning shaft is provided with coal gas spring self-closing type explosion venting device.
6. coal gas of converter dry-wet mixed type dust-removing as claimed in claim 1 system is characterized in that: described cyclone spray gun type dehydrator dewaters for spraying and whirlwind two-stage, and its inside is provided with spray pistol and fixed centrifugal impeller.
7. coal gas of converter dry-wet mixed type dust-removing as claimed in claim 1 system, it is characterized in that: the water drain joint sealing that has from washing function is installed respectively in the bottom of described temperature-reducing tower, circular seam Venturi tube and cyclone spray gun type dehydrator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN2012203914025U CN202786303U (en) | 2012-08-08 | 2012-08-08 | Dry-wet mixed dust removal system for converter gas |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN2012203914025U CN202786303U (en) | 2012-08-08 | 2012-08-08 | Dry-wet mixed dust removal system for converter gas |
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CN202786303U true CN202786303U (en) | 2013-03-13 |
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CN2012203914025U Expired - Lifetime CN202786303U (en) | 2012-08-08 | 2012-08-08 | Dry-wet mixed dust removal system for converter gas |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
CN105063273A (en) * | 2015-09-04 | 2015-11-18 | 江苏博际喷雾***有限公司 | Converter primary flue gas low-energy-consumption semidry-process dust removal system |
CN105498963A (en) * | 2015-12-16 | 2016-04-20 | 七台河宝泰隆煤化工股份有限公司 | Method for removing dust in water gas |
CN105986058A (en) * | 2015-02-04 | 2016-10-05 | 北京博鹏蓝天环保设备有限公司 | Novel dust removing device for flue gas of converter |
CN106702080A (en) * | 2017-02-08 | 2017-05-24 | 中冶华天工程技术有限公司 | Vaporization cooling flue for electric converter |
CN106731343A (en) * | 2015-11-24 | 2017-05-31 | 北京博鹏北科科技有限公司 | A kind of efficient spray evaporates cooling purifying device and its application method |
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 |
-
2012
- 2012-08-08 CN CN2012203914025U patent/CN202786303U/en not_active Expired - Lifetime
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
CN103320568B (en) * | 2013-06-25 | 2015-06-17 | 中国重型机械研究院股份公司 | Multifunctional intelligent spray dust collection cooler |
CN105986058A (en) * | 2015-02-04 | 2016-10-05 | 北京博鹏蓝天环保设备有限公司 | Novel dust removing device for flue gas of converter |
CN105063273A (en) * | 2015-09-04 | 2015-11-18 | 江苏博际喷雾***有限公司 | Converter primary flue gas low-energy-consumption semidry-process dust removal system |
CN106731343A (en) * | 2015-11-24 | 2017-05-31 | 北京博鹏北科科技有限公司 | A kind of efficient spray evaporates cooling purifying device and its application method |
CN105498963A (en) * | 2015-12-16 | 2016-04-20 | 七台河宝泰隆煤化工股份有限公司 | Method for removing dust in water gas |
CN106702080A (en) * | 2017-02-08 | 2017-05-24 | 中冶华天工程技术有限公司 | Vaporization cooling flue for electric converter |
CN106702080B (en) * | 2017-02-08 | 2018-10-12 | 中冶华天工程技术有限公司 | A kind of electricity coverter pig gasification cooling flue |
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 |
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C14 | Grant of patent or utility model | ||
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Granted publication date: 20130313 |
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