CN101423345A - Head kiln dust collection zero discharge system for cement precalcining kiln - Google Patents
Head kiln dust collection zero discharge system for cement precalcining kiln Download PDFInfo
- Publication number
- CN101423345A CN101423345A CNA2008101811840A CN200810181184A CN101423345A CN 101423345 A CN101423345 A CN 101423345A CN A2008101811840 A CNA2008101811840 A CN A2008101811840A CN 200810181184 A CN200810181184 A CN 200810181184A CN 101423345 A CN101423345 A CN 101423345A
- Authority
- CN
- China
- Prior art keywords
- dust
- kiln
- past customs
- lingering remnants
- flashboard
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000428 dust Substances 0.000 title claims abstract description 54
- 239000004568 cement Substances 0.000 title claims abstract description 21
- 239000012716 precipitator Substances 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 235000007164 Oryza sativa Nutrition 0.000 claims description 4
- 235000009566 rice Nutrition 0.000 claims description 4
- 240000007594 Oryza sativa Species 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003245 coal Substances 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 12
- 239000003546 flue gas Substances 0.000 description 12
- 239000007789 gas Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 239000003570 air Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 241000209094 Oryza Species 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005367 electrostatic precipitation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- VXPLXMJHHKHSOA-UHFFFAOYSA-N propham Chemical compound CC(C)OC(=O)NC1=CC=CC=C1 VXPLXMJHHKHSOA-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
Images
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The present invention relates to a kind of head kiln dust collection zero discharge system for cement precalcining kiln, form by blower fan (8), several parts of cold blast valve (9) under cooling machine (1), induced exhaust (2), dust precipitator (3), inlet flashboard (4), induced draft fan (5), outlet flashboard (6), time lingering remnants of past customs pipe (7), the chamber.The present invention has realized that the zero release of the kiln hood lingering remnants of past customs emission problem that gathers dust is completely resolved, and need not change and gather dust, and only notes the care and maintenance that electricity is gathered dust.Environmental issue is solved by perfection; Owing to need not gather dust the great risk that has not also had filter bag to burn out by bag; Lingering remnants of past customs circulation about 130 ℃ has certain effect of economizing on coal.
Description
Technical field
The present invention relates to a kind of cement precalciner kiln kiln hood dust collecting system, the use of gathering dust of cement precalciner kiln.
Background technology
Cement rotary kiln is the dust pollution source of cement mill maximum, and new type nonaqueous cement production line all is used for drying material with kiln exit gas, and with the shared fly-ash separator of kiln tail.On the other hand, the kiln hood cooling machine system lingering remnants of past customs is established a dust-precipitator again.Stipulate among new " Cement industry atmosphere pollutants emission standards " GB4915-2004 that revises: " cement kiln and kiln are grinding integrated " emission standard is 50mg/Nm
3, this requires the dust removal installation ability operation up to standard of efficient stable.World developed country is more and more stricter to the emission request of cement kiln.The IPPC of European Union (comprehensive pollution prevention and control) instruction (96.61.EC) is pointed out about " the best available techniques (BAT) of cement manufacturing industry and pollutant emission guide ": adopting bag dedusting and electrostatic precipitation technology is 20 ~ 30mg/Nm to empty discharge control level
3There are some countries (to reach 10mg/Nm as Germany, Dutch Cement industry dust discharge even requirement
3), " zero release becomes " become a kind of trend especially in recent years.
Kiln hood cooling machine lingering remnants of past customs dust-precipitator adopts dust precipitator, continues to increase electricity usually and gathers dust the maintenance dynamics to I period 50mg/Nm
3Limit value is only realized trying to keep, and arrives II period 30mg/Nm so
3Limit value, fly-ash separator are just obviously not competent.
Electric precipitator is that to utilize high pressure static electricity to carry out gas dirt isolating, and dust removal process divides three phases:
(1) powder dust particle that enters in the electric precipitator is with electric charge earlier
(2) electrically charged grit moves the back sedimentation
(3) rapping makes the deposition dust releasing
The industrial electro fly-ash separator is in actual motion, dedusting is a comparatively complicated process, be subjected to all multifactor influences, these factors comprise physics, electric power, hydromeehanics etc., and strong jamming effect is the character of flue gas and dust, as the ratio resistance of dust, gas temperature, humidity, grit character (hardness, granular size), air-flow velocity etc., wherein we can singly emphasize 2 points, A for this: dust specific resistance and B: grit character.Than resistance is the most critical factor of decision dust-collecting efficiency, and grit character (grit hardness, grit size, grit amount) is the key factor that causes the dust-precipitator wearing and tearing.
Dust precipitator require the control exhaust gas dust than resistance 10
4~ 10
11This scope of Ω cm, its efficiency of dust collection the best, higher, the on the low side dust-collecting efficiency that all obviously restricts.Therefore the operating mode flue gas needs modified control ratio resistance.And the actual operating mode of kiln hood lingering remnants of past customs flue gas is given the modified very burden that brings.Show as that Dust Capacity fluctuation is big, the flue-gas temperature fluctuation is big (along with the change of kiln operation condition, during sometimes such as the low temperature kiln, change greatly), work of water sprinkling for better material moisture only there are, lower the temperature and open at present these limited means of cold blast valve, be difficult to guarantee optimum range, sometimes even out of control.
On the other hand, the grit character utmost point is unfavorable for that dust-precipitator normally moves, and clinker dust is very hard, bonds with the water reaction simultaneously, and to the dust-precipitator wearing and tearing greatly, maintenance difficulties is big, along with prolonging duration of service dust-collecting efficiency is descended significantly.
In view of electricity gather dust above defective its operation and the having a long way to go of emission standard limit value.The environment specialist requires the cement mill to abandon kiln hood already and uses dust precipitator, then uses sack cleaner.But scheme promotes difficult, and major cause is that sack cleaner is difficult to adapt to the abominable working condition of kiln hood flue gas.The present bag of high temperature filter bag that gathers dust can bear 240 ~ 260 ℃ of top temperatures, and the kiln hood flue-gas temperature can reach 300 ~ 400 ℃ fluctuation, and this is that present cloth bag is unaffordable.The factory that has it used air-cooled tower to add the scheme of bagroom, uses many huge fans that airduct is lowered the temperature, and except that increasing greatly the power consumption, sizable limitation arranged also, and the probability that burns out whole storehouse filter bag still exists.In addition, a bag running resistance of gathering dust is 7 ~ 8 times that electricity gathers dust, and generally about 1500Pa, its induced draft fan power generally is that electricity gathers dust and uses 1.7 times of induced draft fan like this, and power consumption significantly increases.These all make the cement mill that the kiln hood general purpose bag is gathered dust and hang back to also have high bagroom investment cost and maintenance cost (as following table: a 3000t/d production line electric precipitation and the dust separating expense of bag are relatively).
Summary of the invention
The objective of the invention is to develop a kind of head kiln dust collection zero discharge system for cement precalcining kiln, make manufacture of cement have dust zero discharge usefulness.
Technical process of the present invention is described as:
As shown in Figure 1, when dust collecting system equipment normally moves, the lingering remnants of past customs that the cooling machine comes out is by the traction of induced draft fan, gather dust by electricity, to the motion of chimney direction, the flashboard that at this moment enters the mouth is opened, and the outlet flashboard cuts out, the lingering remnants of past customs enters back lingering remnants of past customs pipeline (returning lingering remnants of past customs pipeline specifically is located at apart from induced draft fan 2-3 rice eminence) by induced draft fan, reenters the cooling machine under the effect of back blower fan under the chamber.Because the flue gas of recycle can not satisfy fully and use air quantity, and the worry blower fan causes bearing temperature height or impeller impaired because of sucking hot flue gas.We are setting up cold blast valve returning on the lingering remnants of past customs arm of blower fan under every chamber.When the lingering remnants of past customs temperature of returning was too high, we can reduce the temperature of blower fan suction flue gas under the chamber by the aperture of regulating cold blast valve like this.Like this fan bearing and impeller are played a protective role, the setting of cold blast valve simultaneously, the hot lingering remnants of past customs of having avoided returning is to the negative impact of grog refrigerative.
The cooling machine lingering remnants of past customs and kiln exit gas have a difference, and it is that ambient air is admitted in the grog heap layer of red heat and goes to carry out heat exchange, and chemical reaction does not take place, and gas is that temperature improves, and its gas composition does not change.Kiln exit gas has then passed through calcination reaction in the kiln and has got rid of, and gas composition changes greatly.So just produce a thinking, cooling machine lingering remnants of past customs induced draft fan expellant gas is possible recycle.Analyze cooling machine wind process: blower fan sucks ambient air under the cooling machine Duo Tai chamber, they are sent in the grog layer of red heat, pass the warm air of grog, a part is used to the rotary kiln fire coal, another part enters decomposing furnace with tertiary-air pipe and finishes reaction with the decomposing furnace fire coal,, and common about 250 ~ 280 ℃ of more cryogenic wind is inhaled into dust precipitator as the lingering remnants of past customs.Under most of situation, go out its Dust Capacity of electric precipitator flue gas and can drop to 50mg/Nm
3Temperature is also reduced to about 130 ℃.Our imagination is such, for the flue gas identical with the normal air oxygen level that contains about 130 ℃ of low amounts of dust, temperature like this, is all sucked by blower fan under the chamber, sends the recycle of cooling machine back to.
The present invention is a head kiln dust collection zero discharge system for cement precalcining kiln, as shown in drawings, system features is: described system is made up of blower fan (8), several parts of cold blast valve (9) under cooling machine (1), induced exhaust (2), dust precipitator (3), inlet flashboard (4), induced draft fan (5), outlet flashboard (6), time lingering remnants of past customs pipe (7), the chamber.Wherein induced exhaust (2) connects cooling machine (1) and dust precipitator (3), inlet flashboard (4) is positioned on the pipeline between dust precipitator (3) and the induced draft fan (5), outlet flashboard (6) is installed on the chimney of induced draft fan (5) outlet, returning lingering remnants of past customs pipe (7) opens and is positioned at induced draft fan (5) 2-3 rice and is positioned at position below the outlet flashboard (6) on the chimney of induced draft fan (5) outlet, blower fan (8) is connected under the Duo Tai chamber under returning lingering remnants of past customs pipe (7) and being installed in cooling machine (1), and cold blast valve (9) is located at returning on the position of lingering remnants of past customs arm (7) near blower fan (8) under the chamber of blower fan under every chamber (8).
Embodiment
Embodiment
In the debugging of cement afterheat generation project, when the equipment of cement kiln normally moves, aperture with cold blast valve (9) is made as 0% earlier, open inlet flashboard (4), cooling machine (1) 200-230 ℃ of lingering remnants of past customs of coming out are through the traction of induced exhaust (2) by induced draft fan (5) like this, by dust precipitator (3) afterwards temperature can drop in 150 ℃ substantially, close the outlet flashboard (6), dust content is 30--50mg/Nm
3The flue gas lingering remnants of past customs enter back lingering remnants of past customs pipe (7) by induced draft fan (5), the lingering remnants of past customs enter the room down blower fan (8) need through reaching more than 50 meter return lingering remnants of past customs arm (7), in this process, lose the part heat again, temperature will drop to about 50 ℃, and the lingering remnants of past customs of this temperature can not influence the works better of blower fan under the chamber (8) substantially, and we regulate cold blast valve (9) once more, and making its aperture is about 30%, the temperature of the lingering remnants of past customs is further reduced, and final about 37 ℃ wind is blown into cooling machine (1).About 1000 ℃ the grog that calcining is good enters the cooling machine, cool off by the wind-warm syndrome higher about 30 ℃ and can not produce any negative impact the chilling effect than normal temperature, practice by our one and a half months, the quality that has also confirmed grog compares high-quality really, and 28 days intensity of grog continue to remain on more than the 56.5MPa at present.
Description of drawings
Accompanying drawing 1 is system architecture schematic diagram of the present invention. The present invention by grate-cooler (1), induced duct (2), cottrell (3), Entrance flashboard (4), air-introduced machine (5), outlet flashboard (6), return blower fan (8) under lingering remnants of past customs pipe (7), the chamber, cold blast sliding valve (9) is several Part forms. Wherein induced duct (2) connects grate-cooler (1) and cottrell (3), and entrance flashboard (4) is positioned at cottrell (3) and on the pipeline between the air-introduced machine (5), outlet flashboard (6) is installed on the chimney of air-introduced machine (5) outlet, Hui Yu Airduct (7) is opened chimney in air-introduced machine (5) outlet and is positioned at air-introduced machine (5) 2-3 rice and is positioned at below the outlet flashboard (6) The position, blower fan (8) is connected under the Duo Tai chamber under returning lingering remnants of past customs pipe (7) and being installed in grate-cooler (1), cold blast sliding valve (9) is established Returning on the position of lingering remnants of past customs arm (7) near blower fan (8) under the chamber of blower fan (8) under every chamber.
The present invention has following advantage:
The zero-emission that has realized the lingering remnants of past customs emission problem that gathers dust is completely resolved, and need not change and gather dust, and only notes the dimension that electricity is gathered dust Protect and maintain. Environmental issue is solved by perfection; Owing to need not gather dust the great risk that has not also had filter bag to burn out by bag; 130 ℃ of left sides Right lingering remnants of past customs circulation has certain effect of economizing on coal.
Claims (1)
1. head kiln dust collection zero discharge system for cement precalcining kiln, it is characterized by: described system is by cooling machine (1), induced exhaust (2), dust precipitator (3), inlet flashboard (4), induced draft fan (5), outlet flashboard (6), return lingering remnants of past customs pipe (7), blower fan under the chamber (8), several parts of cold blast valve (9) are formed, wherein induced exhaust (2) connects cooling machine (1) and dust precipitator (3), inlet flashboard (4) is positioned on the pipeline between dust precipitator (3) and the induced draft fan (5), outlet flashboard (6) is installed on the chimney of induced draft fan (5) outlet, returning lingering remnants of past customs pipe (7) opens and is positioned at induced draft fan (5) 2-3 rice and is positioned at position below the outlet flashboard (6) on the chimney of induced draft fan (5) outlet, blower fan (8) is connected under the Duo Tai chamber under returning lingering remnants of past customs pipe (7) and being installed in cooling machine (1), and cold blast valve (9) is located at returning on the position of lingering remnants of past customs arm (7) near blower fan (8) under the chamber of blower fan under every chamber (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101811840A CN101423345A (en) | 2008-11-27 | 2008-11-27 | Head kiln dust collection zero discharge system for cement precalcining kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101811840A CN101423345A (en) | 2008-11-27 | 2008-11-27 | Head kiln dust collection zero discharge system for cement precalcining kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101423345A true CN101423345A (en) | 2009-05-06 |
Family
ID=40614255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101811840A Pending CN101423345A (en) | 2008-11-27 | 2008-11-27 | Head kiln dust collection zero discharge system for cement precalcining kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101423345A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829638A (en) * | 2012-09-19 | 2012-12-19 | 河南易能达能源科技有限公司 | System using cement kiln front waste gas as cooling air of grate cooler |
| CN103542716A (en) * | 2013-10-30 | 2014-01-29 | 淄博科邦热工科技有限公司 | Control method of cement clinker sintering system |
| CN104142071A (en) * | 2013-05-06 | 2014-11-12 | 宁夏嘉翔自控技术有限公司 | Intelligent smoke treatment system of electric calcining furnace |
| CN115183592A (en) * | 2022-06-27 | 2022-10-14 | 中材建设有限公司 | A device for recycling waste heat of a grate cooler |
-
2008
- 2008-11-27 CN CNA2008101811840A patent/CN101423345A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829638A (en) * | 2012-09-19 | 2012-12-19 | 河南易能达能源科技有限公司 | System using cement kiln front waste gas as cooling air of grate cooler |
| CN104142071A (en) * | 2013-05-06 | 2014-11-12 | 宁夏嘉翔自控技术有限公司 | Intelligent smoke treatment system of electric calcining furnace |
| CN103542716A (en) * | 2013-10-30 | 2014-01-29 | 淄博科邦热工科技有限公司 | Control method of cement clinker sintering system |
| CN103542716B (en) * | 2013-10-30 | 2015-09-02 | 淄博科邦热工科技有限公司 | Cement clinker burning system control method |
| CN115183592A (en) * | 2022-06-27 | 2022-10-14 | 中材建设有限公司 | A device for recycling waste heat of a grate cooler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100404991C (en) | Large-scale cement kiln flue gas treatment process and its device | |
| WO2016155267A1 (en) | Process and system for waste-heat staged recycling and pollutant emission reduction of sintering flue gases | |
| CN104034175A (en) | Energy-saving and emission-reducing type sintering process | |
| CN102173608A (en) | Method for preparing cement clinker from high-proportion carbide slag through decomposition outside kiln of five-stage preheater | |
| CN108931141A (en) | A kind of technique for realizing inexpensive denitration using sinter waste-heat sintered discharge gas | |
| CN101423345A (en) | Head kiln dust collection zero discharge system for cement precalcining kiln | |
| CN208320222U (en) | A kind of limekiln flue gas recirculation system | |
| CN108411116A (en) | A kind of lateritic nickel ore RKEF smelting processes smoke gas comprehensive treatment system and method | |
| CN205174413U (en) | Boiler smoke whirlwind separation recycle device | |
| CN202126190U (en) | Flue dust treatment device for ferroalloy of industrial silicon and 75# silicon submerged arc furnace | |
| CN201002045Y (en) | Safety energy-saving type device for preparing pulverized coal | |
| CN220567891U (en) | Vertical mill combined suspended clay calcining system for processing high moisture clays | |
| CN201157744Y (en) | Swirl type humidifying pre-dedusting apparatus | |
| CN107192271B (en) | System and method for recycling stray flue gas in smelting production process | |
| CN207585376U (en) | A kind of fiery grading plant that disappears that gathers dust of cement produced with the dry method rotary kiln grate-cooler | |
| CN204694083U (en) | One gets wind heat-obtaining device and system thereof | |
| CN101716548A (en) | Grinding system used for extracting vanadium from stone coal | |
| CN205603616U (en) | Granular coal pulverizing system | |
| CN103896501A (en) | Kiln tail ventilation system and kiln tail ventilation process of lime production line | |
| CN214075543U (en) | Flue gas conditioning device of bag-type dust collector | |
| CN205909704U (en) | Rotary kiln exhaust gas treatment equipment with detect function | |
| CN209226857U (en) | A kind of energy-efficient natural gas perlite bloating plant | |
| CN209081746U (en) | Limekiln air inlet system | |
| CN2647406Y (en) | High-temperature large cloth bag dust cleaner | |
| CN101240176A (en) | Recovery and Utilization of Remaining Energy of Coke Oven Flue Gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090506 |