CN202620954U - High temperature smoke purifying system - Google Patents
High temperature smoke purifying system Download PDFInfo
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- CN202620954U CN202620954U CN 201220128143 CN201220128143U CN202620954U CN 202620954 U CN202620954 U CN 202620954U CN 201220128143 CN201220128143 CN 201220128143 CN 201220128143 U CN201220128143 U CN 201220128143U CN 202620954 U CN202620954 U CN 202620954U
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- flue gas
- temperature flue
- filter
- pressure
- ash
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Abstract
The utility model discloses a high temperature smoke purifying system capable of controlling furnace pressure. The high temperature smoke purifying system comprises a filtering system, a reverse blowing system and an ash discharge system, wherein the filtering system comprises a high temperature smoke guide pipe, at least one filter connected with the high temperature smoke guide pipe and a fan for driving gas to be purified to pass the filter, the reverse blowing system and the ash discharge system are respectively connected with the filter, the fan is a variable frequency fan, a pressure sensor is arranged in the high temperature smoke guide pipe, and the pressure sensor and a variable frequency controller of the fan are respectively connected with a controller by signals. The high temperature smoke purifying system disclosed by the utility model can control furnace pressure and ensure stability in the purifying process of gas.
Description
Technical field
The utility model relates to a kind of gas purification facility, relates in particular to a kind of high-temperature flue gas purification system that carries out purified treatment to the high-temperature flue gas that is produced in the metallurgy industry.
Background technology
Pyrometallurgical smelting tends to produce the great amount of high-temperature flue gas, and the improvement of these high-temperature flue gas is had great energy-conserving and environment-protective meaning.Production with ferroalloy is example, and China is main at present to produce ferroalloy through the hot stove in ore deposit with the carbon reduction ore, and the production kind has ferrosilicon, calcium-silicon, industrial silicon, high carbon ferromanganese, high siderochrome, silicochromium or the like; Wherein, furnace charge relies on electric arc and electric current to carry out the submerged arc reducing and smelting through the resistance arc heat that produces, and produces the fuel gas such as carbon monoxide about a large amount of 500 ℃ of degree during smelting, can be used for generating or production chemical product.Administration way to this high-temperature flue gas is divided into wet method and dry cleaning at present.In the wet cleaning; Use a large amount of water purification to purify to reclaim ore-smelting electric furnace coal gas,, produced a large amount of sewage that contains other harmful substances such as high suspended matter, sulfide, cyanide, ammonia nitrogen thus the electric furnace flue gas dust removal washing of lowering the temperature; This sewage directly repetitive cycling uses; Cause a large amount of harmful wastewater dispositions maybe need handle, cause the waste of great lot of water resources and the loss of valuable mineral matter, the sewage disposal workload is huge.More and more come into one's own with environmental protection along with energy-conservation, the type of furnace of the hot stove in ferroalloy ore deposit progressively changes into closed, and the gas cleaning mode also develops to the dry cleaning direction.
The existing high-temperature flue gas purification system that is used for dry cleaning mainly comprises filtration system, blowback system and dust removing system; Wherein, Filtration system comprises high-temperature flue gas access tube, at least one the cloth envelop collector that is connected with said high-temperature flue gas access tube again and drives the blower fan of gas to be clean through said cloth envelop collector that said cloth envelop collector is connected with dust removing system with blowback system respectively.Usually, between high-temperature flue gas access tube and cloth envelop collector, also be provided with preparatory cleaner in the filtration system, cleaner mainly adopts mechanical dust collector in advance, such as gravitational precipitator, cyclone dust collectors or the like.Like this, the high-temperature flue gas that comes from the high-temperature flue gas access tube at first enters into preparatory cleaner and carries out preliminary solid and gas separation, and after this, the flue gas that the preliminary solid and gas of process separates gets into and carries out accurate relatively filtration in the cloth envelop collector, reclaims at last again.
Practice is found, mainly there is following several respects problem in above-mentioned traditional high-temperature flue gas purification system applies in the middle of the hot stove furnace gas in ferroalloy ore deposit is administered: the first, and dewfall, tar are stuck with paste film and are caused the filter element pollution problem.It is the most important factor that influences high temperature air filtration that dewfall, tar are stuck with paste film; Also be technological difficulties that perplex the high temperature air filtration industry at present; And produce dewfall, tar stick with paste film mainly be because system drive or docking process in separate out aqueous water or a small amount of tar because gas temperature drops to below the dew point in cartridge surface and condense and separate out, thereby the service life of reducing filter core.The second, ferroalloy ore deposit hot stove furnace pressure control problem.It is very unstable that material etc. will be fed in raw material, smash to the hot stove working of a furnace in ferroalloy ore deposit, the normal requirement about control furnace pressure ± 10Pa, and degree-of-difficulty factor is very big.The 3rd, the online ash discharge problem of high-temperature flue gas purification system.In order to improve the service life of blower fan; Blower fan in the high-temperature flue gas purification system is preferably disposed on the end of system process; Like this; Whole high-temperature flue gas purification system will form the mode that negative pressure drives smoke movement, thereby cause the ash discharge difficulty greater than the air pressure in the dust removing system because of the outer air pressure of dust removing system.The 4th, the problem of generation tar when igniting is diffused.When still reclaiming when requiring for reaching through the gas after the high-temperature flue gas purification system handles, need light a fire and diffuse this gas, at this moment will produce the tar pollution environment.
The utility model content
The technical problem that the utility model solved provides a kind of high-temperature flue gas purification system that can control furnace pressure.
For this reason; This high-temperature flue gas purification system comprises filtration system, blowback system and dust removing system; Said filtration system comprises high-temperature flue gas access tube, at least one the filter that is connected with said high-temperature flue gas access tube and drives the blower fan of gas to be clean through said filter; Said filter is connected with dust removing system with blowback system respectively, and wherein, said blower fan is a frequency conversion fan; Be provided with pressure sensor in the said high-temperature flue gas access tube, said pressure sensor is connected with controller signals respectively with the frequency-variable controller of said blower fan.
Further be; Be connected with appendix between the gas pipeline of said high-temperature flue gas access tube and said blowback system, thereby this appendix is provided with and is used for regulating the controlling valve of voltage regulation that feeds pressure oscillation the flow control high-temperature flue gas access tube of protective gas of high-temperature flue gas access tube from this appendix.
Further be, said filtration system comprises gas quench system, and the exhaust end of Purge gas of said filter is connected with said gas quench system.
Further be; Said dust removing system comprises first ash-valve that is arranged on said filter bottom; Said first ash-valve connects second ash-valve through ash releasing tube; Said second ash-valve connects bulk cement storage tank through pipeline, pressure in the said bulk cement storage tank and ambient pressure balance, and said ash releasing tube is connected with the pressure relief device that the air pressure that makes in this ash releasing tube is less than or equal to said filter internal pressure.
As the concrete structure of pressure relief device, said pressure relief device comprises the pressure-equalizing pipe between the gas inlet end to be clean that is connected said ash releasing tube and said filter, and this pressure-equalizing pipe is provided with control valve.
Further be; Be connected with air shooter between said blowback system and the dust removing system; This air shooter is provided with pressure-control valve, and said air shooter feeds the low-voltage variation gas that does not influence ash discharge through this pressure-control valve in the removing ash pipeline of dust removing system.
Further be to be connected with the blast pipe that is used for feeding protective gas between the gas pipeline of said blowback system and the said filter to the ashes accumulation regions of filter.
Further be that by the technological process direction of this high-temperature flue gas purification system, said blower fan is arranged at after the said filter.
Further be that the filter core in the said filter adopts FeAl, TiAl or NiAl intermetallic compound porous material to make.
The beneficial effect of the utility model is: when pressure sensor detects in the warm flue gas access tube air pressure change; Detection signal is sent to controller; Controller sends frequency change control signal according to the program of setting to the frequency-variable controller of blower fan after receiving detection signal, thereby the rotating speed of blower fan is regulated.When the raise rotating speed of seasonal blower fan of furnace pressure increases, so just strengthened the discharge capacity of furnace gas, thus the reduction furnace pressure; And the rotating speed that reduces seasonal blower fan when furnace pressure reduces, and has so just reduced the discharge capacity of furnace gas, thus the increase furnace pressure.It is thus clear that the application's high-temperature flue gas purification system can realize furnace pressure control, guarantee the stability of gas cleaning process.
Description of drawings
Fig. 1 is the general structure sketch map of the utility model high-temperature flue gas purification system.
Fig. 2 is the partial enlarged drawing at A place among Fig. 1.
Fig. 3 is the schematic diagram that the utility model high-temperature flue gas purification system realizes furnace pressure control.
Heavy line among Fig. 1-2 is represented the in-service pipeline of gas after gas to be clean and the purification, and dotted line is represented the in-service pipeline of protective gas; Arrow among Fig. 1 is represented the traffic direction of gas after gas to be clean and the purification.
The specific embodiment
The high-temperature flue gas purification service system that is used for the hot stove flue gas cleaning in ferroalloy ore deposit as shown in Figure 1; Comprise filtration system, blowback system and dust removing system; Said filtration system comprises high-temperature flue gas access tube 1a, two filter 1c that are connected with said high-temperature flue gas access tube 1a and drives the blower fan 1e of gas to be clean through said filter 1c; These two filter 1c setting that is connected in parallel to each other; They are connected with dust removing system with blowback system respectively, also are provided with preparatory cleaner 1b between high-temperature flue gas access tube 1a and this two filter 1c, and cleaner 1b adopts gravitational precipitator in advance; Blowback system adopts protective gas, is provided with protective gas heater 2b in this blowback system; When this high-temperature flue gas purification system boot, said blowback system is as the filter core anti-condensation system of preheating that the filter core 1c01 among the filter 1c is blown, when shutdown then as the protective gas exchange system that the raw-gas among the filter 1c is replaced.Above-mentioned " protective gas " can adopt rare gas such as nitrogen or argon gas, but considers preferably to adopt nitrogen from use cost.Said high-temperature flue gas access tube 1a links to each other with the flue of the hot stove in ferroalloy ore deposit, thereby the high-temperature furnace gas that the hot fire grate in ferroalloy ore deposit goes out is introduced in this high-temperature flue gas purification service system.Like Fig. 1, shown in 2; In this high-temperature flue gas purification system boot stage, be heated to more than 250 ℃ through protective gas heater 2b from the nitrogen of the gas bag 2a of blowback system output, get among two filter 1c through gas pipeline 2c then; Thereby the filter core 1c01 among these two filter 1c carries out preheating; Like this, when when filter 1c feeds the gas to be clean of high temperature, will dewfall, tar paste film can not take place on filter core 1c01 surface; In this high-temperature flue gas purification system-down stage; Thereby continuing in filter 1c, to be blown into high temperature nitrogen through blowback system replaces the raw-gas among these two filter 1c; Discharged and light a fire and diffuse through pipeline by the raw-gas that displaced; And be full of nitrogen among the displacement after-filter 1c, thereby avoid sticking with paste film at filter core 1c01 surface generation dewfall, tar.As shown in Figure 2, blowback system carries out blowback through Venturi tube 2d to filter core 1c01, can produce desirable blowback effect like this.
For the furnace pressure fluctuation with the hot stove in ferroalloy ore deposit is controlled in the scope of requirement; Like Fig. 1, shown in 3; Said blower fan 1e is a frequency conversion fan; Be provided with pressure sensor 9 among the said high-temperature flue gas access tube 1a, said pressure sensor 9 is connected with controller 10 signals respectively with the frequency-variable controller of said blower fan 1e.Like this; When pressure sensor 9 detects among the warm flue gas access tube 1a air pressure change, detection signal is sent to controller 10, controller 10 sends frequency change control signal according to the program of setting to the frequency-variable controller of blower fan 1e after receiving detection signal; Thereby the rotating speed to blower fan 1e is regulated; Promptly increase when the raise rotating speed of seasonal blower fan 1e of furnace pressure, so just strengthened the discharge capacity of furnace gas, thus the reduction furnace pressure; And the rotating speed that reduces seasonal blower fan 1e when furnace pressure reduces, and has so just reduced the discharge capacity of furnace gas, thus the increase furnace pressure.
Like Fig. 1, shown in 3; Another kind of means as furnace pressure control; Between the gas pipeline 2c of said high-temperature flue gas access tube 1a and said blowback system, be connected with appendix 4, thereby this appendix 4 is provided with and is used for regulating the controlling valve of voltage regulation 5 that feeds pressure oscillation the flow control high-temperature flue gas access tube 1a of protective gas of high-temperature flue gas access tube 1a from this appendix 4.The aperture of controlling valve of voltage regulation 5 can be controlled, but also can control through independently control system equally through above-mentioned pressure sensor 9, controller 10.When through pressure sensor 9, when controller 10 is controlled; Detect air pressure change among the warm flue gas access tube 1a by pressure sensor 9; Then detection signal is sent to controller 10, controller 10 receives behind the detection signal aperture of regulating controlling valve of voltage regulation 5 according to the program of setting.If the air pressure that pressure sensor 9 detects among the warm flue gas access tube 1a increases, regulate with the aperture that reduces controlling valve of voltage regulation 5, otherwise the aperture that then increases controlling valve of voltage regulation 5 is regulated.Above-mentioned second kind of furnace pressure control device preferably adopts with first kind of furnace pressure control device simultaneously, realizes the furnace pressure coarse adjustment with first kind of furnace pressure control device as main means, realizes the furnace pressure accurate adjustment with second kind of furnace pressure control device as supplementary means.
As shown in Figure 1, when still reclaiming when requiring, need light a fire and diffuse this gas for reaching through the gas after the high-temperature flue gas purification system handles.Produce tar in order to prevent to light a fire when diffusing, said filtration system comprises gas quench system 1d, and the exhaust end of Purge gas of said filter 1c is connected with said gas quench system 1d.Gas quench system 1d preferably adopts step by step the type of cooling to reach better cooling effect; For example the gas quench system 1d among Fig. 1 just comprises first order cooling device d1 and second level cooling device d2; First order cooling device d1 can adopt air-cooled mode, and second level cooling device d2 can adopt water-cooling pattern to carry out deep cooling.
As shown in Figure 1, in order to improve the service life of blower fan 1e, therefore said blower fan 1e is arranged at after the filter 1c by the technological process direction of this high-temperature flue gas purification system, like this, whole high-temperature flue gas purification system will form the mode of negative pressure driving smoke movement.In this case; For resolution system ash discharge problem, like Fig. 1, shown in 2, said dust removing system comprises the first ash-valve 3a that is arranged on said filter 1c bottom; The said first ash-valve 3a connects the second ash-valve 3c through ash releasing tube 3b; The said second ash-valve 3c connects bulk cement storage tank 3d through pipeline, pressure among the said bulk cement storage tank 3d and ambient pressure balance, and said ash releasing tube 3b is connected with the pressure relief device that the air pressure that makes among this ash releasing tube 3b is less than or equal to said filter 1c internal pressure.In the high-temperature flue gas purification process, the first ash-valve 3a and the second ash-valve 3c are in normally off; When detecting filter 1c bottom and need ash discharge; Open the first ash-valve 3a earlier; Make the air pressure among the ash releasing tube 3b between the first ash-valve 3a and the second ash-valve 3c be less than or equal to said filter 1c internal pressure through pressure relief device then; At this moment, filter 1c bottom ashes will enter among the ash releasing tube 3b; Close the first ash-valve 3a after setting certain hour, open the second ash-valve 3c then, because pressure and ambient pressure balance among the bulk cement storage tank 3d, so the ashes among the ash releasing tube 3b leans on gravity to get among the bulk cement storage tank 3d, thus the realization ash discharge.The below of cleaner 1b and two filter 1c is equipped with identical dust removing system in advance, and the bulk cement storage tank 3d of these three groups of dust removing systems connects a more large-scale grey storehouse 3g simultaneously.As the concrete structure of pressure relief device, pressure relief device comprises the pressure-equalizing pipe 3e between the gas inlet end to be clean that is connected said ash releasing tube 3b and said filter 1c, and this pressure-equalizing pipe 3e is provided with control valve 3f.As long as opening controlling valve 3f makes ash releasing tube 3b be communicated with the gas inlet end to be clean of filter 1c, the air pressure among the ash releasing tube 3b will reach balance with filter 1c internal pressure gradually.In order to prevent that outside air from passing through dust removing system entering filter 1c and producing potential safety hazard; Like Fig. 1, shown in 2; Be connected with air shooter 6 between said blowback system and the dust removing system; This air shooter 6 is provided with pressure-control valve 7, and said air shooter 6 feeds the low-voltage variation gas that does not influence ash discharge through this pressure-control valve 7 in the removing ash pipeline of dust removing system.
For ease of ash discharge, be connected with the blast pipe 8 that is used for feeding protective gas between the gas pipeline 2c of said blowback system and the said filter 1c to the ashes accumulation regions of filter 1c.Feed protective gas through the ashes accumulation regions of blast pipe 8 in filter 1c and can play the gas agitation effect, prevent ashes gathering obstruction.In this high-temperature flue gas purification system-down stage, also can in filter 1c, feed protective gas to accelerate gas displacement speed through blast pipe 8.
In the application's high-temperature flue gas purification service system, the filter core 1c01 among the filter 1c can adopt multiple membrane material, for example pottery, metal etc.As preferably, can adopt FeA1, TiAl or NiA1 intermetallic compound porous material, this material has good comprehensive performances, and especially high temperature corrosion-resisting property and good filtering accuracy are particularly suitable for high-temperature flue gas purification.
Claims (9)
1. high-temperature flue gas purification system; Comprise filtration system, blowback system and dust removing system; Said filtration system comprises high-temperature flue gas access tube (1a), at least one the filter (1c) that is connected with said high-temperature flue gas access tube (1a) and drives the blower fan (1e) of gas to be clean through said filter (1c); Said filter (1c) is connected with dust removing system with blowback system respectively; It is characterized in that: said blower fan (1e) is a frequency conversion fan, is provided with pressure sensor (9) in the said high-temperature flue gas access tube (1a), and said pressure sensor (9) is connected with controller (10) signal respectively with the frequency-variable controller of said blower fan (1e).
2. a kind of high-temperature flue gas purification as claimed in claim 1 system; It is characterized in that: be connected with appendix (4) between the gas pipeline (2c) of said high-temperature flue gas access tube (1a) and said blowback system, this appendix (4) be provided be used for regulating from this appendix (4) feed high-temperature flue gas access tube (1a) thus the flow control high-temperature flue gas access tube (1a) of protective gas the controlling valve of voltage regulation (5) of pressure oscillation.
3. a kind of high-temperature flue gas purification as claimed in claim 1 system, it is characterized in that: said filtration system comprises gas quench system (1d), the exhaust end of Purge gas of said filter (1c) is connected with said gas quench system (1d).
4. a kind of high-temperature flue gas purification as claimed in claim 1 system; It is characterized in that: said dust removing system comprises first ash-valve (3a) that is arranged on said filter (1c) bottom; Said first ash-valve (3a) connects second ash-valve (3c) through ash releasing tube (3b); Said second ash-valve (3c) connects bulk cement storage tank (3d) through pipeline; Pressure in the said bulk cement storage tank (3d) and ambient pressure balance, said ash releasing tube (3b) is connected with the pressure relief device that the air pressure that makes in this ash releasing tube (3b) is less than or equal to said filter (1c) internal pressure.
5. a kind of high-temperature flue gas purification as claimed in claim 4 system; It is characterized in that: said pressure relief device comprises the pressure-equalizing pipe (3e) between the gas inlet end to be clean that is connected said ash releasing tube (3b) and said filter (1c), and this pressure-equalizing pipe (3e) is provided with control valve (3f).
6. a kind of high-temperature flue gas purification as claimed in claim 1 system; It is characterized in that: be connected with air shooter (6) between said blowback system and the dust removing system; This air shooter (6) is provided with pressure-control valve (7), and said air shooter (6) feeds the low-voltage variation gas that does not influence ash discharge through this pressure-control valve (7) in the removing ash pipeline of dust removing system.
7. a kind of high-temperature flue gas purification as claimed in claim 1 system is characterized in that: be connected with the blast pipe (8) that is used for feeding to the ashes accumulation regions of filter (1c) protective gas between gas pipeline of said blowback system (2c) and the said filter (1c).
8. a kind of high-temperature flue gas purification as claimed in claim 1 system, it is characterized in that: by the technological process direction of this high-temperature flue gas purification system, said blower fan (1e) is arranged at said filter (1c) afterwards.
9. a kind of high-temperature flue gas purification as claimed in claim 1 system, it is characterized in that: the filter core (1c01) in the said filter (1c) adopts FeAl, TiAl or NiAl intermetallic compound porous material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220128143 CN202620954U (en) | 2012-03-30 | 2012-03-30 | High temperature smoke purifying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220128143 CN202620954U (en) | 2012-03-30 | 2012-03-30 | High temperature smoke purifying system |
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| Publication Number | Publication Date |
|---|---|
| CN202620954U true CN202620954U (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220128143 Expired - Lifetime CN202620954U (en) | 2012-03-30 | 2012-03-30 | High temperature smoke purifying system |
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| CN (1) | CN202620954U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142070A (en) * | 2013-05-06 | 2014-11-12 | 宁夏嘉翔自控技术有限公司 | Intelligent treatment electrical automatic control system for smoke of electrically-calcined furnace |
| CN104726624A (en) * | 2015-03-24 | 2015-06-24 | 启东市海信机械有限公司 | Automatic gas release ignition pressure stabilizing system |
-
2012
- 2012-03-30 CN CN 201220128143 patent/CN202620954U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142070A (en) * | 2013-05-06 | 2014-11-12 | 宁夏嘉翔自控技术有限公司 | Intelligent treatment electrical automatic control system for smoke of electrically-calcined furnace |
| CN104726624A (en) * | 2015-03-24 | 2015-06-24 | 启东市海信机械有限公司 | Automatic gas release ignition pressure stabilizing system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20121226 |
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| CX01 | Expiry of patent term |