CN102441307A - Smelting furnace exhaust gas filtering system - Google Patents

Smelting furnace exhaust gas filtering system Download PDF

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Publication number
CN102441307A
CN102441307A CN2011103512012A CN201110351201A CN102441307A CN 102441307 A CN102441307 A CN 102441307A CN 2011103512012 A CN2011103512012 A CN 2011103512012A CN 201110351201 A CN201110351201 A CN 201110351201A CN 102441307 A CN102441307 A CN 102441307A
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CN
China
Prior art keywords
filtering
spray
frame
filter course
filtering ponds
Prior art date
Application number
CN2011103512012A
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Chinese (zh)
Inventor
胡茂友
王建新
汪吉庆
黄竹喧
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铜陵康达铝合金制品有限责任公司
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Priority to CN2011103512012A priority Critical patent/CN102441307A/en
Publication of CN102441307A publication Critical patent/CN102441307A/en

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Abstract

The invention discloses a smelting furnace exhaust gas filtering system. The space in a spray tower is separated by at least two layers of filtering layers which can move vertically, can be additionally arranged and can be detached, wherein the filtering fineness of the filtering layers is gradually reduced from top to bottom in the filtering layers; a spray frame is arranged above each filtering layer; a plurality of water valves on which nozzles can be selectively installed and arranged are arranged on frame bodies; a filtering pool group comprises at least two filtering pools; two adjacent filtering pools are connected through a filtering pipeline; the filtering fineness of the filtering pipeline is gradually reduced from upstream to downstream; the pumping end of a water supply pump is arranged in the filtering pool at the tail end of the filtering pool group; and the water supplying end of the water supply pump is connected with each spray frame. The smelting furnace exhaust gas filtering system has the advantages that: the filtering time, the size of a de-dusting space, the spray water potential and the like can be freely adjusted and set; and different exhaust gas can be effectively filtered.

Description

Melting furnace waste gas filtering system

Technical field

The present invention relates to a kind of filtration system, especially the waste gas filtering system of melting furnace.

Background technology

On June 6th, 2007, the Chinese invention patent specification CN1319629C of bulletin disclosed a kind of spray column with absorber paste redistribution device; This spray column is provided with absorber paste redistribution device at the upstream end of filter course; Absorbent slurry is made full use of, and the collection wall flows and absorbent slurry is distributed again, effectively increases the vapour-liquid contact area; Prevent gas " short circuit ", improve filter efficiency.Several point defects below but this spray column exists: at first; Absorber paste redistribution device is set just to the insufficient remedial measure of smoke filtration; Solve filtration problems from filtering link and filter effect etc., secondly for different types of waste gas, the waste gas of complicated component, more sad filter especially; Because the defective of filter course also can't reach satisfied filter result even be provided with absorber paste redistribution device.

Summary of the invention

The technical problem that the present invention will solve provides a kind of melting furnace waste gas filtering system, can freely adjust the flow of water of filtering number of times, dedusting space size, spray etc. is set, and from dust removal by filtration, all kinds of different waste gas of high efficiency filter.

The present invention realizes through following technical scheme.

A kind of melting furnace waste gas filtering system, it has comprised that air inlet is positioned at the spray column that bottom, gas outlet are positioned at the top, is arranged on the filtering ponds group at slag-drip opening place, spray column bottom, the supply-water pump of spray column is sent in the spray liquid circulation after the filtering ponds group is filtered;

Spray column is separated space in the tower by the two-layer at least filter course that can move up and down, increase dismounting, and the filtering fineness of filter course successively decreases in spray column from lower to upper, and every layer of filter course top all is provided with the spray frame, and support body is provided with some nozzles of installing selected;

The filtering ponds group comprises at least two filtering ponds, is connected by filter pipe between adjacent filtering ponds, and the filtering fineness of filter pipe is successively decreased by upper reaches downstream;

The end that draws water of supply-water pump is located in the filtering ponds at filtering ponds group terminal, send water end (W.E.) to be connected with each spray frame of spray column.

Further; Above-mentioned filter course comprises bracing frame and supports the aperture by bracing frame is the filtration sieve plate of 10mm~50mm; The tower wall inboard of filtration tank is provided with at least two vertical draw-in grooves, is provided with the slide block that can slide up and down and can block in the draw-in groove, and the support end of bracing frame is taken and is placed on the slide block.

Further; Above-mentioned spray frame comprises body frame; Install on the body frame support that at least one can rotate in horizontal plane and the water route is communicated be set, support be provided with rotate joint be divided into it rotatable and the water route is communicated with three sections, spray Tata wall place is provided with some flange port selectivity and connects and spray the frame body frames.

Further, the Ta Bichu of above-mentioned spray column is provided with some vertical holes, and the hole place is equipped with photoscope.

Further; Above-mentioned spray column preferably is provided with the three layer filtration layer; In spray column, be respectively first filter course, second filter course, the 3rd filter course from lower to upper; The spray frame of every layer of filter course top setting is respectively the first spray frame, the second spray frame, the 3rd spray frame from lower to upper; Distance is preferably 1.0m~1.5m between first filter course and the first spray frame, and distance is preferably 0.8m~1.2m between second filter course and the second spray frame, and distance is preferably 0.5m~1.0m between the 3rd filter course and the 3rd spray frame.

Further, the sieves panel aperture of above-mentioned first filter course is preferably 35mm~45mm, each sieve aperture axis with filter that the sieve plate axis is intersected and angle all less than 60 °, the line segment that each sieve aperture axis is cut by sieve plate face and sieve plate axis is non-intersect; The sieves panel aperture of second filter course is preferably 25mm~35mm, each sieve aperture axis perpendicular to sieve plate that this axis intersected to becoming line, the antarafacial angle of each sieve aperture axis and sieve plate axis is greater than 10 ° and less than 60 °; The sieves panel aperture of three layer filtration layer is preferably 15mm~25mm, and each sieve aperture parallel axes is in filtering the sieve plate axis.

Further; The above-mentioned first spray frame preferably is provided with a support perpendicular to body frame, and body frame is provided with the nozzle of two symmetries about support, and the stage casing of support is provided with two nozzles about the body frame symmetry; The both sides section of support is parallel to horizontal plane, and is equipped with a nozzle; The second spray frame preferably is provided with two supports, is 60 ° of angles between three mutually, and three are equipped with four about rotating point-symmetric nozzle; The 3rd spray frame preferably is provided with a support perpendicular to body frame, and body frame and support are equipped with two about rotating point-symmetric nozzle.

Further; Above-mentioned filtering ponds group preferably is provided with three filtering ponds; Be respectively first filtering ponds, second filtering ponds, the 3rd filtering ponds by upper reaches downstream; Be provided with screen cloth in the middle of the filter pipe between adjacent filtering ponds, the mesh size of filter pipe preferably is made as 30mm~40mm between first and second filtering ponds, and the mesh size of filter pipe preferably is made as 10mm~20mm between second and third filtering ponds.

Further, the parallelly connected moisturizing end of end that is provided with and draws water of above-mentioned supply-water pump, the moisturizing section connects the equipment of additional spray liquid outward.

Beneficial effect of the present invention:

1, the filtration number of plies and filter space size is set voluntarily, can must be provided with for the filtration of different waste gas inferior more flexibly;

2, every layer of filter course filter different aperture that sieve plate is provided with to, can regulate trend, the distance of waste gas in spray column, can more fully must contact and with its filtration with spray liquid;

3, the polymorphic setting of spray frame can be adjusted the flow of water that is fit to spray better, increases filter efficiency;

4, the tower wall of spray column is provided with a series of peepholes longitudinally, can observe and in time adjust whole spray process;

5, the setting of filtered water reservoir group can progressively be filtered the waste residue that filters out in the pond, the spray liquid after pond, terminal connection supply-water pump will filter is sent into spray column and recycled, and environmental protection is saved.

Description of drawings

Fig. 1 is the structural representation of this embodiment melting furnace waste gas filtering system;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the A part partial enlarged drawing of Fig. 1;

Fig. 4 is that first filter course filters the axis of sieve plate sieve aperture and the key diagram that concerns that first filter course filters sieve plate;

Fig. 5 is that second filter course filters the axis of sieve plate sieve aperture and the key diagram that concerns that second filter course filters sieve plate;

Fig. 6 is that the 3rd filter course filters the axis of sieve plate sieve aperture and the key diagram that concerns that the 3rd filter course filters sieve plate;

Fig. 7 is the upward view of the first spray frame;

Fig. 8 is the upward view of the second spray frame;

Fig. 9 is the upward view of the 3rd spray frame.

The specific embodiment

According to accompanying drawing and embodiment the present invention is done further explain below.

Fig. 1 is the structural representation of this embodiment melting furnace waste gas filtering system, with reference to Fig. 1, and the present invention, melting furnace waste gas filtering system, it is made up of spray column 1, filtering ponds group 2 and supply-water pump 3.The air inlet 11 of spray column 1 is positioned at the bottom of spray column 1, and gas outlet 12 is positioned at the top of spray column 1, and slag-drip opening 13 is positioned at the bottom of spray column, and is positioned at filtering ponds group 2 places.The end 31 that draws water of supply-water pump 3 is located in the filtering ponds group; Send water end (W.E.) 33 to be communicated with spray column 1; Moisturizing end 35 is parallelly connected with the end 31 that draws water; The equipment of external additional spray liquid, drawing water of supply-water pump 3 held 31, sent water end (W.E.) 33 and moisturizing end 35 to be equipped with the flow velocity that flow speed control valve 311,331,351 is controlled each function end.

In this embodiment; Preferably be provided with the three layer filtration layer; Be respectively first filter course 14, second filter course 15, the 3rd filter course 16 from lower to upper; The top of each layer filter course is respectively equipped with the first spray frame 17, second and sprays frame 18, the 3rd spray frame 19; These three spray framves are chosen wherein 3 104,105,106 of the flange port that is arranged on spray column 1 tower wall respectively and are connected with the water end (W.E.) 33 that send of supply-water pump 3 as port, and spray column 1 is provided with 3 peepholes 101,102,103 longitudinally at Ta Bi.

Wherein, distance is made as 1.2m between first filter course 14 and the first spray frame 17, and distance is made as 1.0m between second filter course 15 and the second spray frame 18, and distance is made as 0.8m between the 3rd filter course 16 and the 3rd spray frame 19.

Fig. 2 is the vertical view of Fig. 1; With reference to Fig. 2, and combine Fig. 1, filtering ponds group 2 is made up of three filtering ponds; Be respectively first filtering ponds 21, second filtering ponds 23, the 3rd filtering ponds 25 to downstream from the upper reaches; Be provided with between first filtering ponds 21 and second filtering ponds 23 between filter pipe 27, the second filtering ponds 23 and the 3rd filtering ponds 25 and be provided with filter pipe 29, the end 31 that draws water of supply-water pump 3 is arranged at the end-filtration Chi25Chu of filtering ponds group 2.

Wherein, filter pipe 27 is equipped with screen cloth 271,291 with the centre of filter pipe 29, and the aperture of screen cloth 271 is 30mm, and the aperture of screen cloth 291 is 10mm.

Fig. 3 is the A part partial enlarged drawing of Fig. 1, with reference to Fig. 3, and combines Fig. 1; Each filter course 14,15,16 of spray column 1 is all consistent with the Installation Modes of spray column; So only to A part partial enlarged drawing, promptly first filter course 14 describes at this, first filter course 14 constitutes by filtering sieve plate 141 and bracing frame 143; Bracing frame 143 is the vertical bar shape; The inwall place of spray column is provided with two vertical and symmetrical draw-in grooves 107,108, and draw-in groove 107,108 is respectively equipped with slide block 145 and slide block 147, slide block 145,147 lower ends be respectively equipped with and draw-in groove between the fixture block 1451 and the fixture block 1471 of great friction coefficient; The two ends of bracing frame 143 are taken respectively and are put on slide block 145 and the slide block 147, filter sieve plate 141 and are positioned on the bracing frame 143.In like manner can get filtration sieve plate 151 and the filtration sieve plate 161 of bracing frame 153, the three filter courses 16 and the structure of bracing frame 163 of second filter course 15.

Wherein, filtration sieve plate 141 apertures of first filter course 14 are made as 40mm, and filtration sieve plate 151 apertures of second filter course 15 are made as 30mm, and filtration sieve plate 161 apertures of the 3rd filter course 16 are made as 20mm.

Fig. 4 is that first filter course filters the axis of sieve plate sieve aperture and the key diagram that concerns that first filter course filters sieve plate; With reference to Fig. 4; And combination Fig. 1,3; The axis M that first filter course 14 filters sieve plates 141 any sieve apertures 1411 all intersects with the axis L that first filter course 14 filters sieve plates 141, and the angle of M and L encloses in from 60 ° from filtration sieve plate 141 outermost and be decremented to 10 ° gradually, and the while, each sieve aperture axis M was non-intersect by the line segment between filtration sieve plate 14 and axis L.

Fig. 5 is that second filter course filters the axis of sieve plate sieve aperture and the key diagram that concerns that second filter course filters sieve plate; With reference to Fig. 5; And combination Fig. 1 and above-mentioned explanation for Fig. 3; The axis M that second filter course 15 filters sieve plates 151 any sieve apertures 1511 all is 45 ° with the axis L antarafacial angle β of second filter course, 15 filtration sieve plates 151, and the line of symmetry N of the crossing filtration sieve plate 151 of the axis M of any sieve aperture 1511 and M is vertical.

Fig. 6 is that the 3rd filter course filters the axis of sieve plate sieve aperture and the key diagram that concerns that the 3rd filter course filters sieve plate; With reference to Fig. 6, and combine Fig. 1 and above-mentioned explanation for Fig. 3, the axis M of the 3rd filter course 16 filtration sieve plates 161 any sieve apertures 1611 is all parallel with the axis L of the 3rd filter course 16 filtration sieve plates 161.

Fig. 7 is the upward view of the first spray frame, with reference to Fig. 7, and combines Fig. 1; The first spray frame 17 is made up of body frame 171 and support 173, and body frame 171 is vertical each other with support 173, and the water route communicates between body frame 171 and the support 173; Support 173 is a three stage structure; Be respectively that the water route communicates between 1733,1735, three sections of stage casing 1731 and the both sides sections, three section 1731,1733,1735 of support 173 constitutes a plane; And be parallel to horizontal plane; Body frame 171 is provided with the nozzle 1711,1713 of 2 symmetries about support 173, and the stage casing 1731 of support 173 is provided with 2 nozzles 17311,17313 about body frame 171 symmetries, and the both sides section 1733,1735 of support 173 is respectively equipped with 1 nozzle 17331,17351.

Fig. 8 is the upward view of the second spray frame; With reference to Fig. 8; And combination Fig. 1; The second spray frame 18 is made up of body frame 181 and support 183,185, three 181,183, be 60 ° of angles between 185 mutually, and between the water route communicate; Being equipped with 4 for three 181,183,185 is the nozzle 1811,1813,1815,1817 on the body frame 181 about rotating point-symmetric nozzle, nozzle 1831,1833,1835,1837 on the support 183 and the nozzle 1851,1853,1855,1857 on the support 185.

Fig. 9 is the upward view of the 3rd spray frame; With reference to Fig. 9; And combination Fig. 1, the 3rd spray frame 19 is made up of body frame 191 and support 193, and body frame 191 is vertical each other with support 193; And the water route communicates, and it is nozzle 1911,1913 and the nozzle 1931,1933 on the support 193 on the body frame 191 about rotating point-symmetric nozzle that body frame 191 and support 193 are equipped with 2.

When the present invention is in running order; Waste gas inlet 11 gets in the spray column 1; Successively through first filter course 14, second filter course 15, the 3rd filter course 16 and through the dust removal by filtration of the first spray frame 17, the second spray frame 18, the 3rd spray frame 19; Waste gas concentrates on around the axis L of first filter course 14 after through first filter course 14, and the structure of first filter course 14 is arranged so that the flow of water also concentrates on around the L of axis, makes waste gas when first time dedusting, be in the bigger flow of water; The cooling-down effect of waste gas is remarkable, and the waste residue that diameter in the waste gas is bigger filters; Waste gas gets into and is spiral behind second filter course 15 and slowly rises; Increased waste gas and promptly prolonged spray time in the distance of this dedusting; The flow of water of the second spray frame 18 is more even in any cross-section simultaneously; Can increase the aqueous vapor contact area of waste gas and spray liquid, better dust removal effect is with the also maximum waste residue filtration of the amount of being of waste residue of waste gas intermediate diameters; Waste gas filters short grained waste residue through the dedusting of the 3rd spray frame 19 after getting into the 3rd filter course 16, is discharged by gas outlet 12 through the gas behind the filtration, purification.Get in the filtering ponds group 2 through the waste residue behind the three layer filtration; Filtration through the twice filter pipe 27,29 of three filtering ponds 21,23,25; Spray liquid in the end-filtration pond 25 belongs to the spray liquid that purifies the work that can spray, and provides spray column 1 to recycle by supply-water pump 3 extractions.

Design of the present invention can be adapted to various dissimilar waste gas and carry out dust removal by filtration, only need according to the characteristics of waste gas spray frame and the distance between filter course of the number of plies of filter course, aperture direction that each filter course filters sieve plate, each filter course reasonably is set, structure of each spray frame is that the flow of water gets final product.

The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to let the personage that is familiar with this art can understand content of the present invention and also implements, and can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.

Claims (9)

1. melting furnace waste gas filtering system, it has comprised that air inlet is positioned at the spray column that bottom, gas outlet are positioned at the top, is arranged on the filtering ponds group at slag-drip opening place, spray column bottom, the supply-water pump of spray column is sent in the spray liquid circulation after the filtering ponds group is filtered;
It is characterized in that; Said spray column is separated space in the tower by the two-layer at least filter course that can move up and down, increase dismounting; The filtering fineness of filter course successively decreases in spray column from lower to upper, and every layer of filter course top all is provided with the spray frame, and support body is provided with some nozzles of installing selected;
Said filtering ponds group comprises at least two filtering ponds, is connected by filter pipe between adjacent filtering ponds, and the filtering fineness of filter pipe is successively decreased by upper reaches downstream;
The end that draws water of said supply-water pump is located in the filtering ponds at filtering ponds group terminal, send water end (W.E.) to be connected with each spray frame of spray column.
2. melting furnace waste gas filtering according to claim 1 system; It is characterized in that; Said filter course comprises bracing frame and supports the aperture by bracing frame is the filtration sieve plate of 10mm~50mm; The tower wall inboard of filtration tank is provided with at least two vertical draw-in grooves, is provided with the slide block that can slide up and down and can block in the draw-in groove, and the support end of bracing frame is taken and is placed on the slide block.
3. melting furnace waste gas filtering according to claim 1 system; It is characterized in that; Said spray frame comprises body frame; Install on the body frame support that at least one can rotate in horizontal plane and the water route is communicated be set, support be provided with rotate joint be divided into it rotatable and the water route is communicated with three sections, spray Tata wall place is provided with some flange port selectivity and connects and spray the frame body frames.
4. melting furnace waste gas filtering according to claim 1 system is characterized in that the Ta Bichu of said spray column is provided with some vertical holes, and the hole place is equipped with photoscope.
5. according to claim 2 or 3 described melting furnace waste gas filtering systems; It is characterized in that; Said spray column is provided with the three layer filtration layer; In spray column, be respectively first filter course, second filter course, the 3rd filter course from lower to upper, the spray frame that every layer of filter course top is provided with is respectively the first spray frame, the second spray frame, the 3rd spray frame from lower to upper, between first filter course and the first spray frame apart from being 1.0m~1.5m; Distance is 0.8m~1.2m between second filter course and the second spray frame, and distance is 0.5m~1.0m between the 3rd filter course and the 3rd spray frame.
6. melting furnace waste gas filtering according to claim 5 system; It is characterized in that; The sieves panel aperture of said first filter course is 35mm~45mm; Each sieve aperture axis with filter that the sieve plate axis is intersected and angle all less than 60 °, the line segment that each sieve aperture axis is cut by sieve plate face and sieve plate axis is non-intersect; The sieves panel aperture of second filter course is 25mm~35mm, and each sieve aperture axis is perpendicular to the line of symmetry of the sieve plate that this axis intersected, and the antarafacial angle of each sieve aperture axis and sieve plate axis is greater than 10 ° and less than 60 °; The sieves panel aperture of three layer filtration layer is 15mm~25mm, and each sieve aperture parallel axes is in filtering the sieve plate axis.
7. melting furnace waste gas filtering according to claim 5 system; It is characterized in that; The first spray frame is provided with a support perpendicular to body frame, and body frame is provided with the nozzle of two symmetries about support, and the stage casing of support is provided with two nozzles about the body frame symmetry; The both sides section of support is parallel to horizontal plane, and is equipped with a nozzle; The second spray frame is provided with two supports, is 60 ° of angles between three mutually, and three are equipped with four about rotating point-symmetric nozzle; The 3rd spray sets up a support perpendicular to body frame, and body frame and support are equipped with two symmetrical nozzles.
8. melting furnace waste gas filtering according to claim 1 system; It is characterized in that; Said filtering ponds group is provided with three filtering ponds, is respectively first filtering ponds, second filtering ponds, the 3rd filtering ponds by upper reaches downstream, is provided with screen cloth in the middle of the filter pipe between adjacent filtering ponds; The mesh size of filter pipe is made as 30mm~40mm between first and second filtering ponds, between second and third filtering ponds the mesh size of filter pipe excellent be 10mm~20mm.
9. melting furnace waste gas filtering according to claim 1 system is characterized in that, the parallelly connected moisturizing end of end that is provided with and draws water of said supply-water pump, and the moisturizing section connects the equipment of additional spray liquid outward.
CN2011103512012A 2011-11-09 2011-11-09 Smelting furnace exhaust gas filtering system CN102441307A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103191615A (en) * 2013-04-10 2013-07-10 山西鑫立能源科技有限公司 Exhaust water bath purifier after humidifying and dewatering hot waste gas of charging coal gangue
CN103939925A (en) * 2014-04-08 2014-07-23 南京凯盛开能环保能源有限公司 Waste heat boiler dust removal device of ferroalloy submerged arc furnace
CN103939931A (en) * 2014-04-28 2014-07-23 太仓新瑞节能设备有限公司 Efficient desulfurization and denitrification energy-saving furnace
CN106765250A (en) * 2016-08-28 2017-05-31 申清章 Condenser system and waste gas cleaning system for purifying waste gas

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1907542A (en) * 2005-08-04 2007-02-07 史梅约 Exhaust gas purification system
CN200977444Y (en) * 2006-08-29 2007-11-21 淄博大工机械有限公司 Water cleaning dust removing device
CN101502733A (en) * 2009-02-13 2009-08-12 无锡市雪江环境工程设备有限公司 Spraying and dust-removing system
CN201701871U (en) * 2010-06-11 2011-01-12 李学良 Desulfuration, denitration, decarburization, dedusting and black smoke removing integrated equipment
CN202283446U (en) * 2011-11-09 2012-06-27 铜陵康达铝合金制品有限责任公司 Exhaust gas filtration system for melting furnace

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1907542A (en) * 2005-08-04 2007-02-07 史梅约 Exhaust gas purification system
CN200977444Y (en) * 2006-08-29 2007-11-21 淄博大工机械有限公司 Water cleaning dust removing device
CN101502733A (en) * 2009-02-13 2009-08-12 无锡市雪江环境工程设备有限公司 Spraying and dust-removing system
CN201701871U (en) * 2010-06-11 2011-01-12 李学良 Desulfuration, denitration, decarburization, dedusting and black smoke removing integrated equipment
CN202283446U (en) * 2011-11-09 2012-06-27 铜陵康达铝合金制品有限责任公司 Exhaust gas filtration system for melting furnace

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103191615A (en) * 2013-04-10 2013-07-10 山西鑫立能源科技有限公司 Exhaust water bath purifier after humidifying and dewatering hot waste gas of charging coal gangue
CN103939925A (en) * 2014-04-08 2014-07-23 南京凯盛开能环保能源有限公司 Waste heat boiler dust removal device of ferroalloy submerged arc furnace
CN103939925B (en) * 2014-04-08 2016-07-06 南京凯盛开能环保能源有限公司 In The Sub-mergedfurnace of The Ferroalloys ash cleaner for exhaust-heating boiler
CN103939931A (en) * 2014-04-28 2014-07-23 太仓新瑞节能设备有限公司 Efficient desulfurization and denitrification energy-saving furnace
CN106765250A (en) * 2016-08-28 2017-05-31 申清章 Condenser system and waste gas cleaning system for purifying waste gas

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Application publication date: 20120509