CN101173837A - Macrotype cement kiln flue gas managing technique and device thereof - Google Patents
Macrotype cement kiln flue gas managing technique and device thereof Download PDFInfo
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- CN101173837A CN101173837A CNA2008100071849A CN200810007184A CN101173837A CN 101173837 A CN101173837 A CN 101173837A CN A2008100071849 A CNA2008100071849 A CN A2008100071849A CN 200810007184 A CN200810007184 A CN 200810007184A CN 101173837 A CN101173837 A CN 101173837A
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- 239000003546 flue gas Substances 0.000 title claims abstract description 67
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000004568 cement Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000000428 dust Substances 0.000 claims abstract description 55
- 230000000694 effects Effects 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000007921 spray Substances 0.000 claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 53
- 239000000523 sample Substances 0.000 claims description 14
- 238000012423 maintenance Methods 0.000 claims description 11
- 230000008520 organization Effects 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 7
- 210000003205 muscle Anatomy 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000010419 fine particle Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 11
- 239000002245 particle Substances 0.000 description 11
- 230000003750 conditioning effect Effects 0.000 description 7
- 239000000779 smoke Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/04—Cleaning filters
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/364—Avoiding environmental pollution during cement-manufacturing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
-
- F27D17/001—
-
- F27D17/004—
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- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental Sciences (AREA)
- Public Health (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention relates to a craft and a apparatus for treating flue gas discharged from large cement kilns; wherein, the high temperature kiln tail flue gas discharged from large cement kilns is fed into a preheater in the kiln tail and mixed with a plurality of materials and then is discharged, after the moistening and the cooling of the flue gas in the flue gas pipeline by a scroll moistening pre-dust remover, the flue gas is fed into a bag dust remover by the high temperature fan to be purified and then is discharged through a chimney by an exhaust fan; partial fine dust in the flue gas is agglomerated by the vortex effect produced by the vortex plate and is dropped into a dust hopper with a plurality of large grains, a sideling spire conveyor is arranged in the dust hopper; the scroll moistening pre-dust remover comprises a spray nozzle, a plurality of water pipes, a pressure valve, a vortex plate, a filter plate and a control mechanism; and the dust hopper is arranged at the bottom of the pipeline discharging the flue gas. The invention has the advantages that the technological process for treating flue gas is simpler and more reasonable, the manufacturing cost is reduced greatly, the dust removal efficiency is enhanced, the dust removal effects and the energy-saving effects are favorable. The invention is in particular suitable for discharging fine particles in kiln tail flue gas of large cement kilns.
Description
Technical field
The present invention relates to flue gases purification, particularly a kind of macrotype cement kiln flue gas managing technology, the macrotype cement kiln flue gas managing technology is divided into large-size cement kiln kiln hood smoke gas treatment technology and large-size cement kiln kiln exit gas improvement technology, and the present invention is primarily aimed at technology and the device thereof that the large-size cement kiln kiln exit gas of daily output more than 4000 tons administered.
Background technology
There is a large amount of cement kilns in China in operation, and being in operation produces a large amount of kiln exit gas, and smoke components is N
2, CO
2, O
2, sulfide, alkali compound, chloride etc., its characteristics are: the one, the dust content height, precalciner kiln kiln tail gas dust content is 40～80g/m
3, particularly when large-size cement kiln adopted kiln grinding integrated, the kiln tail gas dust content was up to 600g/m
3More than; The 2nd, the temperature height, new dry process precalciner kiln kiln tail gas temperature is about 320～350 ℃; The 3rd, the dust-laden particle is thin, and the fine grained of＜10 μ m accounts for 90%; Thereby need carry out udst separation, otherwise can cause serious atmosphere pollution.Simultaneously, the enforcement along with GB4915-2004 " cement industry atmosphere pollutants emission standards " has proposed stricter requirement to the dust emission in the cement industry production process, near American-European developed country level.The composition of existing large-size cement kiln kiln exit gas controlling device is such: comprise kiln tail preheater, high-temperature blower, conditioning Tower, main exhaust fan, sack cleaner, air inlet and gas outlet are arranged on the sack cleaner, the upper end of kiln tail preheater interlinks through flue and high-temperature blower, high-temperature blower links to each other with the air inlet of sack cleaner after flue, conditioning Tower, and the gas outlet of sack cleaner links to each other with chimney.The technology that its kiln exit gas is administered is: the high temperature kiln exit gas more than 1000 ℃ of discharging from large-scale cement rotary kiln kiln tail enters kiln tail preheater, through with kiln tail preheater in material carry out heat exchange after, material in the kiln tail preheater is heated, thereby the high temperature kiln exit gas temperature that the kiln tail is discharged drops to about 350 ℃, under the effect of high-temperature blower, kiln exit gas is sent into the conditioning Tower through flue from kiln tail preheater by high-temperature blower, the high temperature kiln exit gas in conditioning Tower through mist cooling, the temperature of high temperature kiln exit gas is dropped to be lower than 200 ℃, kiln exit gas after the cooling enters sack cleaner through the air inlet of sack cleaner and carries out dedusting, kiln exit gas is through the sack cleaner dedusting, after the purification, discharge gas outlet through sack cleaner, under the effect of main exhaust fan, send into chimney and be discharged into atmosphere again.Existing conditioning Tower is the supporting setting of electric cleaner in original large-size cement kiln kiln exit gas controlling device, after adopting sack cleaner to replace electric cleaner, improve the emission effect of kiln exit gas, but owing to after having adopted conditioning Tower, increased the manufacturing cost of device.In addition, existing sack cleaner is because equal wind poor-performing, make that the space air-flow that has in the filter chamber is too fast, and free district or the adverse current died with rage in the space that has, and exist the problem that air-flow directly washes away filter bag, thereby directly influenced the service life of dust removing effects, operating efficiency and the filter bag of deduster, the combination property of therefore existing long bag pulse bag type dust collector remains further to be improved.
Summary of the invention
Technical problem to be solved by this invention is, at the deficiencies in the prior art part, provide a kind of technology circuit rationally, good dedusting effect, the kiln tail gas smoke dust discharge concentration is at 10mg/Nm
3Below, to compare with existing technology, investment can reduce by 30%, is particularly suitable for removing the macrotype cement kiln flue gas managing technique and the device thereof of minuteness particle.
The technical scheme that the present invention solves its technical problem is:
Macrotype cement kiln flue gas managing technique: the high temperature kiln exit gas more than 1000 ℃ of discharging from large-size cement kiln kiln tail enters kiln tail preheater, through with kiln tail preheater in material carry out heat exchange after, material in the kiln tail preheater is heated, thereby the high temperature kiln exit gas temperature that the kiln tail is discharged drops to about 350 ℃, under the effect of high-temperature blower, enter the kiln exit gas pipeline, sending into bag dust collector by high-temperature blower again purifies, through main exhaust fan, discharge by chimney, it is characterized in that: also contain humidification, the pre-dedusting operation of lowering the temperature, the flue gas of discharging through kiln tail preheater in flue through vortex humidification pre-dedusting device humidification, cooling, send into bag dust collector by high-temperature blower and purify, the part micronic dust in the flue gas is reunited under the eddy current effect that vortex board produces, and fall into ash bucket in the lump with bulky grain in the dust.
The flue gas of kiln tail preheater being discharged with the atomized water of 30～45 μ m carries out humidification in flue, and makes below the flue gas cool-down to 200 ℃.
Macrotype cement kiln flue gas managing device: comprise kiln tail preheater, high-temperature blower, main exhaust fan, sack cleaner, the upper end of kiln tail preheater interlinks through flue and high-temperature blower, kiln exit gas is introduced in the flue, high-temperature blower also links to each other with the air inlet of sack cleaner, so that being introduced, flue gas carries out dedusting in the sack cleaner, the gas outlet of sack cleaner links to each other with chimney, and flue gas after being purified is discharged; It is characterized in that: in flue, be provided with the vortex humidification pre-dedusting device that constitutes by spray nozzle, water pipe, pressure valve, vortex board, filter and controlling organization, bottom at flue is provided with ash bucket, be provided with tilting venetian blind type filter in the ash bucket, collect isolated dust and big dust particle; The bottom of ash bucket is provided with conveying worm, and the dust in the ash bucket is exported; Ash bucket and high-temperature blower interlink, and will be cooled to below 200 ℃ and flue gas after pre-dedusting is introduced in the sack cleaner by high-temperature blower.The present invention is owing to adopt vortex humidification pre-dedusting device, thereby: the one, improve the condition of work of kiln tail high-temperature blower greatly.Kiln tail high-temperature blower is the key equipment of firing system.Its working condition is directly connected to the stable of whole production line output and cement clinker quality and system.After vortex humidification pre-dedusting device humidification, cooling, the temperature of flue gas is reduced to below 200 ℃ by 350-400 ℃, reduces the influence of high exhaust temperatures to blower fan, has reduced the aeration volume flow simultaneously, has reduced the blower fan load.In addition, after vortex humidification pre-dedusting device humidification, cooling, a part of dust is collected, and has reduced fan blade knot ash, wearing and tearing and the unbalance hidden danger of impeller on the high-temperature blower, thus the functional reliability and the service life of having improved high-temperature blower.The 2nd, shortened the kiln end pipe, reduce the production line investment.The 3rd, replace original conditioning Tower with vortex pipeline humidification pre-duster, simplified technological process, reduced floor space, technology arrangement is more reasonable, has reduced energy consumption, has significantly reduced the production line investment, more convenient operation.
The water pipe of vortex humidification pre-dedusting device links to each other with the peripheral hardware water source, and water pipe is connected with several spray nozzles after pressure valve, and spray nozzle is distributed in the top of flue inwall equably, and high-temperature flue gas is carried out spray humidification, cooling; The fan blade type vortex board is installed on the below of spray nozzle, and the eddy current that produces rotates flue gas in pipeline, the larger particles that forms in the flue gas is got rid of to inner-walls of duct under centrifugal action, and reach the purpose of separating with flue gas.
Below above-mentioned vortex board, be provided with cold blast sliding valve, so that suck outside cold wind, guarantee below the flue gas cool-down to 200 ℃.
Above-mentioned ash bucket is the centering type ash bucket, can prevent dust knot arch, causes the stifled ash of ash bucket; And be provided with the venetian blind type filter at place, the gas outlet of centering type ash bucket, with the pre-dust removing effects of further enhancing, the dust that filters out directly falls in the ash bucket.
Controlling organization is made of switch board, water tank, air compressor machine, maintenance bypass, working barrel, loop, temperature probe and moisture probe, its temperature probe is installed on respectively in the upper end and ash bucket of flue, moisture probe also is installed in the ash bucket, with the temperature of air inlet flue gas in the control flue, the temperature and the humidity of the flue gas of giving vent to anger; Water tank, loop, working barrel, maintenance bypass all link to each other with switch board, and the maintenance bypass links to each other with the water pipe of vortex humidification pre-dedusting device, the spray nozzle of vortex humidification pre-dedusting device links to each other with switch board behind air compressor machine, with flow, pressure and the atomizing effect of the spray nozzle of control vortex humidification pre-dedusting device.
Also contain the pressure automatic control pump in the above-mentioned controlling organization, this pressure automatic control pump links to each other with switch board through working barrel, to guarantee flow, pressure and the atomizing effect of spray nozzle.
Described sack cleaner contains filter chamber, air-purifying chamber, filter bag, pulse blowing valve, lift valve, ash bucket and ash conveying device, the both sides of filter chamber are arranged with air inlet and gas outlet, the ash bucket of air inlet and below, filter chamber interlinks, be hung with several filter bags by card in the filter chamber, be provided with cage in the filter bag, be provided with pulse blowing valve and coupled winding-up pipe in the air-purifying chamber of top, filter chamber, the bottom of winding-up pipe is provided with injection hole corresponding to each filter bag, and air-purifying chamber and air outlet interlink behind lift valve; The end opening of ash bucket links to each other with conveying worm through discharger; Be provided with the fan blade type diffuser plate at the air inlet place, the dust that this diffuser plate on the one hand can be bigger with particle diameter in the air-flow directly retaining is gone in the ash bucket, makes the flue gas diffusion on the other hand, is convenient to big dust particle and is deposited in the ash bucket, and improve dust removing effects.
Air inlet place in above-mentioned filter chamber is provided with homogenating plate longitudinally, offers several equal wind holes corresponding to the gap between the filter bag on the homogenating plate; And the lower end of homogenating plate is provided with several tilting arc vortex boards.Like this, dusty gas can be divided into two-way, the downward operation of the dust that particle diameter is bigger in the air-flow directly enters ash bucket, thin dust then moves along homogenating plate and vortex board respectively with air-flow, air-flow upwards laterally enters in the filter chamber by equal wind hole again, downward air-flow enters in the filter chamber after forming eddy current by vortex board, thereby forming vertical and horizontal tow channel gas circulation filter bag filters, guaranteed the uniformity that air-flow distributes, the dust removing effects and the operating efficiency of deduster have been improved, and crossflow enters from the gap of filter bag, the rate of climb of longitudinal air flow has also obtained deceleration, avoid and reduced souring to filter bag, the service life of having improved filter bag effectively.
The vortex board of above-mentioned homogenating plate and its lower end is 105～120 degree angles, is beneficial to the reasonable diffluence of flue gas.
The above-mentioned cage that constitutes by perpendicular muscle, retainer ring in the filter bag of being located at, several retainer rings go to upper and lower distribution, and several perpendicular muscle are fixed in the outside of retainer ring, and described retainer ring is quincunx.Because filter bag is realized filtering and deashing by shrinking, expanding, promptly when filter bag filtered, it is flat that filter bag shrinks, becomes; When carrying out pulse dust cleaning, filter bag expands rapidly; And the existing cage and the filter bag contact-making surface of annular retainer ring of adopting is bigger, reduces filter area, increases running resistance, and the frictional force between filter bag and cage is bigger simultaneously, makes the filter bag rapid wear.Adopt this quincunx retainer ring, then reduced the contact area and the frictional force of cage and filter bag effectively, improved dust removing effects, prolonged the service life of filter bag, when maintenance, be convenient to the extraction of filter bag.
The invention has the beneficial effects as follows: after adopting the present invention, the technological process that the large-size cement kiln kiln exit gas is administered is simple more, reasonable, greatly reduce manufacturing cost, improved efficiency of dust collection, good dedusting effect, energy-saving effect is obvious, is specially adapted to remove the minuteness particle in the large-size cement kiln kiln exit gas.
Description of drawings
Fig. 1 is a process chart of the present invention;
Fig. 2 is the structural representation of eddy current type humidification pre-dedusting device of the present invention;
The structural representation of the eddy current type humidification pre-dedusting device that contains controlling organization that Fig. 3 adopts for invention;
Fig. 4 is the structural representation of sack cleaner of the present invention;
Fig. 5 is the A-A cutaway view of Fig. 4;
Fig. 6 is the B-B cutaway view of Fig. 4;
Fig. 7 is the left view of Fig. 6;
Fig. 8 is the structural representation of the cage in the sack cleaner of the present invention.
Among the figure: 1 is kiln tail preheater, 2 is flue, 3 is eddy current type humidification pre-dedusting device, 3-1 is a cold blast sliding valve, 3-2 is an ash bucket, 3-3 is the maintenance bypass, 3-4 is the pressure automatic control pump, 3-5 is a working barrel, 3-6 is a spray nozzle, 3-7 is a tracheae, 3-8 is a water pipe, 3-9 is a vortex board, 3-10 is an air compressor machine, 3-11 is a conveying worm, 3-12 is a switch board, 3-13 is a water tank, 3-14 is the loop, A and B are temperature probe, C is a moisture probe, 4 is high-temperature blower, 5 is sack cleaner, 5-1 is the filter chamber, the 5-2 air-purifying chamber, 5-3 is a pulse blowing valve, 5-4 is a lift valve, 5-5 is the winding-up pipe, 5-6 is a card, 5-7 is a filter bag, 5-8 is an air inlet, 5-9 is the gas outlet, 5-10 is a cage, 5-10-1 is a retainer ring, 5-10-2 is perpendicular muscle, 5-11 is a homogenating plate, 5-11-2 is a vortex board, 5-11-3 is equal wind hole, 5-12 is an ash bucket, 5-13 is a discharger, 5-14 is a conveying worm, 5-15 is a diffuser plate, 5-16 is an eddy current, 6 is main exhaust fan, 7 is chimney.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail:
The embodiment of the invention is an example with the improvement of cement rotary kiln kiln exit gas, its technology is: the high temperature kiln exit gas more than 1000 ℃ of discharging from large-scale cement rotary kiln kiln tail enters kiln tail preheater 1, through with kiln tail preheater 1 in material carry out heat exchange after, material in the kiln tail preheater 1 is heated, thereby the high temperature kiln exit gas temperature that the kiln tail is discharged drops to about 350 ℃, under the effect of high-temperature blower 4, enter kiln exit gas pipeline 2, the flue gas of kiln tail preheater being discharged with the atomized water of 30～45 μ m through the spray nozzle 3-6 of eddy current type humidification pre-dedusting device 3 in flue 2 carries out humidification in flue, and make below the flue gas cool-down to 200 ℃, part micronic dust in the flue gas is reunited under the eddy current effect that vortex board 3-9 produces simultaneously, and fall into ash bucket 3-2 in the lump with bulky grain in the dust, export by conveying worm 3-11.Flue gas after humidification, cooling, the pre-dedusting is sent into bag dust collector 5 by high-temperature blower 4 again and is purified, and purified gas is introduced chimney 7 by main exhaust fan 6, enters atmosphere.
Macrotype cement kiln flue gas managing device: comprise kiln tail preheater 1, high-temperature blower 4, main exhaust fan 6, sack cleaner 5 and chimney 7.The upper end of kiln tail preheater 1 interlinks through flue 2 and high-temperature blower 4, will introduce in the flue 2 through kiln exit gas.High-temperature blower 4 also links to each other with the air inlet 5-8 of sack cleaner 5, flue gas is introduced carried out dedusting in the sack cleaner 5, and the gas outlet 5-9 of sack cleaner 5 links to each other with chimney 7 behind main exhaust fan 6, and flue gas after being purified is discharged.
Eddy current type humidification pre-dedusting device 3 of the present invention is made of spray nozzle 3-6, tracheae 3-7, water pipe 3-8, vortex board 3-9 and filter 3-15 and 3-16 and switch board 3-12.Its water pipe 3-8 links to each other with the peripheral hardware water source, and water pipe 3-8 is connected with several spray nozzles 3-6 after pressure valve; Tracheae 3-7 also is connected with spray nozzle 3-6 after pressure valve.Spray nozzle 3-6 is distributed in the top of flue 2 inwalls equably, and high-temperature flue gas is carried out spray humidification, cooling; Fan blade type vortex board 3-9 is installed on the below of spray nozzle 3-6, and the eddy current that produces makes flue gas in the rotation of flue 2 high speeds, the big dust that forms in the flue gas is got rid of under centrifugal action to flue 2 inwalls, and reach the purpose of separating with flue gas.Below above-mentioned vortex board 3-9, be provided with cold blast sliding valve 3-1, so that suck the cold wind of peripheral hardware, guarantee below the flue gas cool-down to 200 ℃.Be provided with centering type ash bucket 3-2 in the bottom of flue 2, be provided with tilting venetian blind type filter 3-16 in the ash bucket 3-2, collect isolated dust and big dust particle; And be provided with venetian blind type filter 3-15 at place, the gas outlet of centering type ash bucket 3-2, with the pre-dust removing effects of further enhancing, the dust that filters out directly falls in the ash bucket 3-2.The bottom of ash bucket 3-2 is provided with conveying worm 3-11, and the dust in the ash bucket 3-2 is exported; Place, the gas outlet of ash bucket 3-2 is provided with high-temperature blower 4 and interlinks, be cooled to below 200 ℃ and the flue gas after pre-dedusting by in the high-temperature blower 4 introducing sack cleaners 5.
Above-mentioned controlling organization is made of switch board 3-12, water tank 3-13, air compressor machine 3-10, maintenance bypass 3-3, working barrel 3-5, loop 3-14, temperature probe A, B and moisture probe C, its temperature probe A, B are installed on respectively in the upper end and ash bucket 3-2 of flue 2, moisture probe C also is installed in the ash bucket 3-2, with the temperature of air inlet flue gas in the control flue 2, the temperature and the humidity of the flue gas of giving vent to anger; Water tank 3-13, loop 3-14, working barrel 3-5, maintenance bypass 3-3 all link to each other with switch board 3-12, and maintenance bypass 3-3 links to each other with the water pipe 3-8 of eddy current type humidification pre-dedusting device 3, the spray nozzle 3-6 of eddy current type humidification pre-dedusting device 3 links to each other with switch board 3-12 behind air compressor machine 3-10, with flow, pressure and the atomizing effect of the spray nozzle 3-6 of controlled vortex flow formula humidification pre-dedusting device 3.Also contain pressure automatic control pump 3-4 in the above-mentioned controlling organization, this pressure automatic control pump 3-4 links to each other with switch board 3-12 through working barrel 3-5, to guarantee flow, pressure and the atomizing effect of spray nozzle 3-6.
Air inlet 5-8 place at the above-mentioned 5-1 of filter chamber is provided with homogenating plate 5-11 longitudinally, and homogenating plate 5-11 goes up and offers several equal wind hole 5-11-3 corresponding to the gap between the filter bag 5-7; And the lower end of homogenating plate 5-11 is provided with several tilting arc vortex board 5-11-2.Like this, dusty gas can be divided into two-way, the downward operation of the dust that particle diameter is bigger in the air-flow directly enters ash bucket 5-12, thin dust then moves along homogenating plate 5-11 and vortex board 5-11-2 respectively with air-flow, air-flow is upwards laterally entered in the 5-1 of filter chamber by equal wind hole 5-11-3 again, downward air-flow enters in the 5-1 of filter chamber after forming eddy current 5-16 by vortex board 5-11-2, thereby forming vertical and horizontal tow channel gas circulation filter bag 5-7 filters, guaranteed the uniformity that air-flow distributes, the dust removing effects and the operating efficiency of deduster have been improved, and crossflow enters from the gap of filter bag 5-7, the rate of climb of longitudinal air flow has also obtained deceleration, avoid and reduced souring to filter bag 5-7, the service life of having improved filter bag 5-7 effectively.The angle α that the vortex board 5-11-2 of above-mentioned homogenating plate 5-11 and its lower end is is 110 degree, to be more conducive to the reasonable diffluence of flue gas.The above-mentioned cage 5-10 that constitutes by perpendicular muscle 5-10-2, retainer ring 5-10-1 in the filter bag 5-7 that is located at, several retainer ring 5-10-1 go to upper and lower distribution, and several perpendicular muscle 5-10-2 are fixed in the outside of retainer ring 5-10-1, and described retainer ring 5-10-1 is quincunx.Because filter bag 5-7 realizes filtering and deashing by shrinking, expanding, promptly when filter bag 5-7 filtered, it is flat that filter bag 5-7 shrinks, becomes; When carrying out pulse dust cleaning, filter bag 5-7 expands rapidly; And existing cage 5-10 and the filter bag 5-7 contact-making surface of annular retainer ring 5-10-1 of adopting is bigger, reduces filter area, increases running resistance, and the frictional force between filter bag 5-7 and cage 5-10 is bigger simultaneously, makes filter bag 5-7 rapid wear.Adopt this quincunx retainer ring 5-10-1, then reduced contact area and the frictional force of cage 5-10 and filter bag 5-7 effectively, improved dust removing effects, prolonged the service life of filter bag 5-7.
Claims (12)
1. macrotype cement kiln flue gas managing technique: the high temperature kiln exit gas more than 1000 ℃ of discharging from large-size cement kiln kiln tail enters kiln tail preheater, through with kiln tail preheater in material stir after, under the effect of high-temperature blower, enter the kiln exit gas pipeline, sending into bag dust collector by high-temperature blower again purifies, through main exhaust fan, discharge by chimney, it is characterized in that: also contain humidification, the pre-dedusting operation of lowering the temperature, the flue gas of discharging through kiln tail preheater in flue through vortex humidification pre-dedusting device humidification, after the cooling, send into bag dust collector by high-temperature blower and purify, the part micronic dust in the flue gas is reunited under the eddy current effect that vortex board produces, and fall into ash bucket in the lump with bulky grain in the dust.
2. macrotype cement kiln flue gas managing technique according to claim 1 is characterized in that: the flue gas of kiln tail preheater being discharged with the atomized water of 30～45 μ m carries out humidification in flue, and makes below the flue gas cool-down to 200 ℃.
3. macrotype cement kiln flue gas managing device: comprise kiln tail preheater, high-temperature blower, main exhaust fan, sack cleaner, the upper end of kiln tail preheater interlinks through flue and high-temperature blower, high-temperature blower also links to each other with the air inlet of sack cleaner, the gas outlet of sack cleaner links to each other with chimney, it is characterized in that: in flue, be provided with by spray nozzle, water pipe, pressure valve, vortex board, the vortex humidification pre-dedusting device that filter and controlling organization constitute, bottom at flue is provided with ash bucket, be provided with tilting venetian blind type filter in the ash bucket, the bottom of ash bucket is provided with conveying worm, and ash bucket and high-temperature blower interlink.
4. macrotype cement kiln flue gas managing device according to claim 3, it is characterized in that: the water pipe of vortex humidification pre-dedusting device links to each other with the peripheral hardware water source, water pipe is connected with several spray nozzles after pressure valve, spray nozzle is distributed in the top of flue inwall equably, and the fan blade type vortex board is installed on the below of spray nozzle.
5. macrotype cement kiln flue gas managing device according to claim 4 is characterized in that: be provided with cold blast sliding valve below above-mentioned vortex board.
6. macrotype cement kiln flue gas managing device according to claim 5 is characterized in that: above-mentioned ash bucket is the centering type ash bucket, and is provided with the venetian blind type filter at the place, gas outlet of centering type ash bucket.
7. macrotype cement kiln flue gas managing device according to claim 3, it is characterized in that: controlling organization is made of switch board, water tank, air compressor machine, maintenance bypass, working barrel, loop, temperature probe and moisture probe, its temperature probe is installed on respectively in the upper end and ash bucket of flue, moisture probe also is installed in the ash bucket, water tank, loop, working barrel, maintenance bypass all link to each other with switch board, and the maintenance bypass links to each other with the water pipe of vortex humidification pre-dedusting device, and the spray nozzle of vortex humidification pre-dedusting device links to each other with switch board behind air compressor machine.
8. macrotype cement kiln flue gas managing device according to claim 7 is characterized in that: also contain the pressure automatic control pump in the above-mentioned controlling organization, this pressure automatic control pump links to each other with switch board through working barrel.
9. macrotype cement kiln flue gas managing device according to claim 3, it is characterized in that: described sack cleaner contains the filter chamber, air-purifying chamber, filter bag, pulse blowing valve, lift valve, ash bucket and helix transporting device, the both sides of filter chamber are arranged with air inlet and gas outlet, the ash bucket of air inlet flue and below, filter chamber interlinks, be hung with several filter bags by card in the filter chamber, be provided with cage in the filter bag, be provided with pulse blowing valve and coupled winding-up pipe in the air-purifying chamber of top, filter chamber, the bottom of winding-up pipe is provided with injection hole corresponding to each filter bag, and air-purifying chamber and gas outlet interlink behind lift valve; The end opening of ash bucket links to each other with conveying worm through discharger; Be provided with the diffusing stream wheel of fan blade type at the air inlet place.
10. macrotype cement kiln flue gas managing device according to claim 9 is characterized in that: the air inlet place in above-mentioned filter chamber is provided with homogenating plate longitudinally, offers several equal wind holes corresponding to the gap between the filter bag on the homogenating plate; And the lower end of homogenating plate is provided with several tilting arc vortex boards.
11. macrotype cement kiln flue gas managing device according to claim 10 is characterized in that: the vortex board of above-mentioned homogenating plate and its lower end is 105～120 degree angles.
12. macrotype cement kiln flue gas managing device according to claim 9, it is characterized in that: the above-mentioned cage that constitutes by perpendicular muscle, retainer ring in the filter bag of being located at, several retainer rings go to upper and lower distribution, and the outside of retainer ring is fixed in several vertical rods, and described retainer ring is quincunx.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100071849A CN100404991C (en) | 2008-02-03 | 2008-02-03 | Macrotype cement kiln flue gas managing technique and device thereof |
| PCT/CN2008/070357 WO2009100621A1 (en) | 2008-02-03 | 2008-02-25 | Smoke gas treatment technology and device for huge cement kiln |
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| CNB2008100071849A CN100404991C (en) | 2008-02-03 | 2008-02-03 | Macrotype cement kiln flue gas managing technique and device thereof |
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| CN100404991C CN100404991C (en) | 2008-07-23 |
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| WO (1) | WO2009100621A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2009100621A1 (en) | 2009-08-20 |
| CN100404991C (en) | 2008-07-23 |
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