CN105745179A - Chlorine bypass system and method for removing chlorine from cement kiln exhaust gas - Google Patents
Chlorine bypass system and method for removing chlorine from cement kiln exhaust gas Download PDFInfo
- Publication number
- CN105745179A CN105745179A CN201480062116.6A CN201480062116A CN105745179A CN 105745179 A CN105745179 A CN 105745179A CN 201480062116 A CN201480062116 A CN 201480062116A CN 105745179 A CN105745179 A CN 105745179A
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- CN
- China
- Prior art keywords
- cement kiln
- mentioned
- coarse powder
- chlorine
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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 peculiar to rotary-drum furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D2017/009—Cyclone for separating fines from gas
Abstract
To provide a chlorine bypass system which is capable of flexible operation according to the situation. This chlorine bypass system (1) is provided with: a probe (3) which extracts a portion (G1) of combustion exhaust gas from a kiln exhaust gas flow path leading from the bottom of a cement kiln (2) to a cyclone in the lowermost stage of a preheater; a classification device (5) which separates the gas extracted by the probe into coarse powder (D1), fine powder (D2) and gas (G3); and a distribution device (comprising a storage tank (11) to a screw conveyer (13)) which distributes the coarse powder separated by the classification device to a route for return to the firing system of the cement kiln and a route for discharge from the firing system of the cement kiln. The coarse powder can be distributed at any ratio into these two routes. A dust collection device (8) is provided which recovers fine powder from the fine powder and gas separated by the classification device, and optionally, the coarse powder (D7) distributed to the route for discharge from the firing system of the cement kiln may be merged with the fine powder (D4) recovered by the dust collection device (and fine powder (D3) recovered from a cooler (6)).
Description
Technical field
The present invention relates to that the kiln exhaust gas stream of the lowermost cyclone separator from the arrival end of cement kiln to preheater bleeds the parts of burning gases and the chlorine that removes the chlorine collateral branch system of chlorine and cement kiln aerofluxus removes method.
Background technology
In recent years, the cement raw material of garbage and turning sludge into fuel are advancing.But, the treating capacity along with garbage increases, and the amount of the volatile ingredient bringing the chlorine etc. of cement kiln into is also increasing.Therefore, the chlorine component of the problems such as the blocking becoming the preheater caused in cement making equipment is obligato from the chlorine collateral branch system that the firing system of cement kiln removes.
This chlorine collateral branch system, as shown in Figure 2, bled while a part of G1 of burning gases by probe 3 from the arrival end of cement kiln 2 to the kiln exhaust gas stream of lowermost cyclone separator (not shown), bleed gas G1 carrying out chilling from the cold wind A of cooling fan 4, cyclone separator 5 the micropowder D2 contained by gas G3, chlorine concentrates that bleeds after separating coarse powder D1 is reclaimed as micropowder D4 by bag hose 8.This micropowder D4 and the micropowder D3 reclaimed from cooler 6 stores at storage tank 9 for the moment as chlorine collateral branch dust D5, and outside discharge system thereafter, this can remove chlorine (patent documentation 1,2) efficiently.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2000-354838 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2010-195660 publication
Summary of the invention
The problem that invention to solve
According to above-mentioned chlorine collateral branch system, it is possible to efficiently remove chlorine from cement burning apparatus, but change or corresponding rightly and not readily when the operational situation of cement kiln changes when supplying the cl concn of raw material of cement kiln.
Such as, the cl concn of the raw material of supply cement kiln rises, when being necessary to remove more chlorine, it is necessary to the amount (collateral branch leads) of the gas that increase is evacuated from cement kiln or the classification point of change cyclone separator 5.But, increasing collateral branch and lead, then the change causing the classification point of the increase of the heat loss at cement burning apparatus, on-stream cyclone separator 5 is also frequently difficult.
Therefore, the present invention completes in view of the problem points in above-mentioned existing technology, and purpose is in that to provide: carry out according to situation to remove method by the chlorine in the chlorine collateral branch system of flexible operating and cement kiln aerofluxus.
For solving the means of problem
To achieve these goals, the chlorine collateral branch system that the present invention relates to, it is characterised in that, possess: bleed the probe of a part of burning gases from the arrival end of cement kiln to the kiln exhaust gas stream of lowermost cyclone separator；The grading plant of coarse powder and micropowder and gas will be separated into by the gas of bleeding of this probe；And, by the distributor of the passage that the coarse powder separated by this grading plant distribution is discharged to the passage of firing system and the firing system from above-mentioned cement kiln that return above-mentioned cement kiln.
According to the present invention, the coarse powder separated by grading plant is returned the firing system of cement kiln by distributor, owing to the micropowder of only high cl concn can be discharged from the firing system of cement kiln, it is possible to reduce the treating capacity of dust.On the other hand, the coarse powder separated by grading plant is discharged from the firing system of cement kiln, owing to the chlorine component in coarse powder can be discharged, so can be reduced by the bleed amount of gas of probe, the heat loss that cement burns till suppresses in Min., and result causes the reduction of operating cost.
In above-mentioned chlorine collateral branch system, above-mentioned distributor is can be allocated with arbitrary ratio by the passage that the coarse powder separated by the above-mentioned grading plant return passage of firing system of above-mentioned cement kiln and the firing system from above-mentioned cement kiln are discharged.Thus, the operational situation etc. according to the supply cl concn of raw material of cement kiln, cement kiln, it is possible to carrying out can flexible operation.
Also have, possesses the dust collect plant reclaiming micropowder from the micropowder separated by above-mentioned grading plant and gas, at above-mentioned distributor, distribution is enable to collaborate to the coarse powder of the passage discharged from the firing system of above-mentioned cement kiln and the micropowder reclaimed at above-mentioned dust collect plant.Thus, the coarse powder of distribution and micropowder can process at common process device etc., it is possible to reduce device and operating cost.
Also have, chlorine in the cement kiln aerofluxus that the present invention relates to removes method, it is characterized in that, it is that the kiln exhaust gas stream of lowermost cyclone separator from the arrival end of cement kiln to preheater is bled the part of burning and gas-exhausting, this gas of bleeding is separated into coarse powder and micropowder and gas, a part for this coarse powder separated returns the firing system of above-mentioned cement kiln, and the remnants of the above-mentioned coarse powder separated discharge from the firing system of above-mentioned cement kiln.According to the present invention, same with foregoing invention, reduce the amount etc. of the treating capacity of dust, gas of being bled by probe, it is possible to reduce operating cost.
In chlorine removing method in above-mentioned cement kiln aerofluxus, ratio that the coarse powder of above-mentioned separation returns the firing system of above-mentioned cement kiln or the ratio discharged from the firing system of above-mentioned cement kiln can be adjusted according to the cl concn of raw material of the above-mentioned cement kiln of supply or the operational situation of this cement kiln.
Further, micropowder is reclaimed from the above-mentioned micropowder separated and gas, it is possible to make the coarse powder interflow discharged with the firing system from above-mentioned cement kiln, owing to coarse powder and the micropowder being assigned with processes simultaneously, it is possible to reduce processing cost.
The effect of invention
As described above, according to the present invention, it may be possible to provide corresponding to situation, the flexible chlorine operated in possible chlorine collateral branch system and cement kiln aerofluxus removes method.
Accompanying drawing explanation
What [Fig. 1] represented the embodiment of chlorine collateral branch system that the present invention relates to is monolithically fabricated figure.
What [Fig. 2] represented an example of existing chlorine collateral branch system is monolithically fabricated figure.
Detailed description of the invention
Secondly, an embodiment of the chlorine collateral branch system for the present invention relates to, illustrate with reference to Fig. 1.Additionally, in the following description, for the element identical with the chlorine collateral branch system 21 shown in Fig. 2, give identical reference designation, detailed.
Chlorine collateral branch system 1 shown in Fig. 1, it is characterized in that, back segment at cyclone separator 5, possessing the storage tank 11 stored by the coarse powder D1 discharged from cyclone separator 5, the rotary feeder 12 discharging coarse powder from storage tank 11 and the conveyer-screw 13 at coarse powder D7 and chlorine collateral branch dust D5 interflow discharged, other composition is same with existing chlorine collateral branch system 21.
Storage tank 11 possesses the rotary feeder 12 configured in bottom and at conus portion in order to discharge the outlet 11a of coarse powder D6.The coarse powder D1 of storage tank 11 discharges from conveyer-screw 13 side in part through rotary feeder 12, and position is in the passage importing the firing system being returned cement kiln 2 by outlet 11a than the coarse powder D1 above outlet 11a with overflow system.Or at outlet 11a, rotary feeder can also be set.
Rotary feeder 12 possesses the rotor of rotation-controlled number, by controlling the rotation number of rotor, it is possible to control the output from the coarse powder D7 of storage tank 11.Additionally, rotary feeder 12 is replaced, it is possible to have the discharger using other.
Conveyer-screw 13 is to use as the conveyer device by coarse powder D7 and chlorine collateral branch dust D5 interflow (importing the passage that the firing system from cement kiln 2 is discharged).Additionally, beyond conveyer-screw 13, it is possible to use other the conveyer device such as chain type transveyer.
Secondly, remove method about the chlorine in the action of chlorine collateral branch system 1 with above-mentioned composition and the cement kiln aerofluxus that the present invention relates to, with reference to Fig. 1 while illustrating.
Bled while a part of G1 of burning gases by probe 3 from the arrival end of cement kiln 2 to the kiln exhaust gas stream of lowermost cyclone separator, the gas G1 that bleeds of about 800～1100 DEG C is cooled to the melting point less than 600 DEG C of the chlorine compound of KCl etc. by the cooling air A of 1 cooling fan 4, preferably less than 400 DEG C.Thus, the chlorine compound of the KCl etc. in gas G1 of bleeding precipitates out and is attached to the surface etc. of the micropowder bled in gas G2.
Secondly, the gas G2 that will bleed imports cyclone separator 5, is separated into coarse powder D1 and the gas G3 that bleeds containing micropowder D2, and while coarse powder D1 is supplied storage tank 11, the gas G3 that bleeds is cooled to about 100～200 DEG C by cooler 6.
Secondly, the aerofluxus G4 of cooler 6 is imported bag hose 8 and reclaims micropowder D4, with the micropowder D3 reclaimed from cooler 6 together as chlorine collateral branch dust D5.The aerofluxus G5 of bag hose 8 is the gas extraction system being returned cement kiln 2 by exhaust fan 10.
The part (coarse powder D7) of the coarse powder D1 stored at storage tank 11 is discharged by rotary feeder 12, by conveyer-screw 13 conveying make with chlorine collateral branch dust D5 interflow and after storage tank 9 stores, when cl concn is relatively low, former state is pulverized together with cement block by cement pulverizer and is manufactured cement, when cl concn is high, washing and after removing chlorine, it is possible to utilize as cement raw material etc..
On the other hand, from the outlet 11a of storage tank 11, coarse powder D6 discharges through overflow system, imports the passage of the firing system returning cement kiln 2, uses as cement raw material.
The rotation number of the rotor of above-mentioned rotary feeder 12, the output namely utilizing the coarse powder D7 of rotary feeder 12 is to be controlled by following main points.
Such as, the cl concn of the raw material of supply cement kiln 2 rises, and when removing more chlorine and being necessary, makes to increase with the amount of the coarse powder D7 at chlorine collateral branch dust D5 interflow.Thus, the chlorine component in coarse powder D7 is also expelled to system from the firing system of cement kiln 2, therefore, it is possible to remove more chlorine component.Now, not making the rate of air sucked in required of the gas by probe 3 change, Ji Bushi collateral branch leads that change just can be corresponding, it is possible to the heat loss burnt till by cement suppresses in Min..
On the other hand, when supplying the cl concn reduction of raw material of cement kiln 2, make to reduce with the amount of the coarse powder D7 at chlorine collateral branch dust D5 interflow, make the outlet 11a from storage tank 11 pass through the amount increase of the coarse powder D6 of the firing system of overflow system return cement kiln 2.Thus, and the amount of coarse powder D7 at chlorine collateral branch dust D5 interflow, that is, make the amount of the dust of process object reduce, it is possible to reduce processing cost.
Even if beyond the increase and decrease of the cl concn of the raw material of supply cement kiln 2, operational situation according to the cement burning apparatus comprising cement kiln 2, the coarse powder D1 separated by cyclone separator 5, can distribute to the passage of the firing system returning cement kiln 2 and the passing away from firing system, this operation only can be implemented by the rotation number of the rotor of control rotary feeder 12, it is possible to quickly and easily adjusts apportionment ratio.
Additionally, in the form of above-mentioned enforcement, distribution is to passing through to possess the passage that coarse powder D1 is divided into 2 by the storage tank 11 of outlet 11a, rotary feeder 12, conveyer-screw 13, but device composition is not limited to this, it is possible to use other various devices.
The explanation of symbol
1 chlorine collateral branch system
2 cement kilns
3 probes
4 cooling fans
5 cyclone separator
6 coolers
8 bag hoses
9 storage tanks
10 exhaust fans
11 storage tanks
11a outlet
12 rotary feeders
13 conveyer-screws
Claims (amendment according to treaty the 19th article)
1. chlorine collateral branch system, it is characterised in that
The kiln exhaust gas stream of the lowermost cyclone separator from the arrival end of cement kiln to preheater is bled the probe of a part of burning and gas-exhausting；
The grading plant of coarse powder and micropowder and gas will be separated into by the gas of bleeding of this probe；And
By the distributor of the passage that the coarse powder separated by this grading plant is discharged to the passage of firing system and the firing system from above-mentioned cement kiln that return above-mentioned cement kiln with the distribution of arbitrary ratio.
2. the chlorine collateral branch system that claim 1 is recorded, it is characterised in that,
Possesses the dust collect plant reclaiming micropowder from the micropowder separated by above-mentioned grading plant and gas；
The coarse powder in above-mentioned distributor distribution to the passage discharged from the firing system of above-mentioned cement kiln is made to collaborate with the micropowder reclaimed at above-mentioned dust collect plant.
3. the chlorine in cement kiln aerofluxus removes method, it is characterized in that, the kiln exhaust gas stream of its lowermost cyclone separator from the arrival end of cement kiln to preheater is bled the part of burning and gas-exhausting, by this bleed gas separation coarse powder and micropowder and gas, a part for this coarse powder separated returns the firing system of above-mentioned cement kiln, the remnants of the above-mentioned coarse powder separated discharge from the firing system of above-mentioned cement kiln
The ratio adjusting the firing system that the above-mentioned coarse powder separated is returned above-mentioned cement kiln according to the cl concn of raw material or the operational situation of this cement kiln that supply above-mentioned cement kiln or the ratio discharged from the firing system of above-mentioned cement kiln.
4. the chlorine in the cement kiln aerofluxus that claim 3 is recorded removes method, it is characterised in that,
Reclaiming micropowder from the above-mentioned micropowder separated and gas, the coarse powder discharged with the firing system from above-mentioned cement kiln collaborates.
Claims (6)
1. chlorine collateral branch system, it is characterised in that, possess:
The kiln exhaust gas stream of the lowermost cyclone separator from the arrival end of cement kiln to preheater is bled the probe of a part of burning and gas-exhausting；
The grading plant of coarse powder and micropowder and gas will be separated into by the gas of bleeding of this probe；And
By the distributor of the passage that the coarse powder separated by this grading plant distribution is discharged to the passage of firing system and the firing system from above-mentioned cement kiln that return above-mentioned cement kiln.
2. the chlorine collateral branch system that claim 1 is recorded, it is characterized in that, above-mentioned distributor is able to the passage discharged to the passage of firing system and the firing system from above-mentioned cement kiln that return above-mentioned cement kiln by the coarse powder separated by above-mentioned grading plant with the distribution of arbitrary ratio.
3. the chlorine collateral branch system that claims 1 or 2 is recorded, it is characterised in that,
Possesses the dust collect plant reclaiming micropowder from the micropowder separated by above-mentioned grading plant and gas；
Make the coarse powder in above-mentioned distributor distribution to the passage discharged from the firing system of above-mentioned cement kiln, with the micropowder interflow reclaimed at above-mentioned dust collect plant.
4. the chlorine in cement kiln aerofluxus removes method, it is characterised in that,
The kiln exhaust gas stream of the lowermost cyclone separator from the arrival end of cement kiln to preheater is bled the part of burning and gas-exhausting,
This gas of bleeding is separated into coarse powder and micropowder and gas,
A part for this coarse powder separated returns the firing system of above-mentioned cement kiln, and the remnants of the above-mentioned coarse powder separated discharge from the firing system of above-mentioned cement kiln.
5. the chlorine in the cement kiln aerofluxus that claim 4 is recorded removes method, it is characterised in that,
The ratio adjusting the firing system that the above-mentioned coarse powder separated is returned above-mentioned cement kiln according to the cl concn of raw material or the operational situation of this cement kiln that supply above-mentioned cement kiln or the ratio discharged from the firing system of above-mentioned cement kiln.
6. the chlorine in the cement kiln aerofluxus that claim 4 or 5 is recorded removes method, it is characterised in that,
Reclaim micropowder from the above-mentioned micropowder separated and gas, make the coarse powder interflow discharged with the firing system from above-mentioned cement kiln.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013234902 | 2013-11-13 | ||
| JP2013-234902 | 2013-11-13 | ||
| PCT/JP2014/078316 WO2015072310A1 (en) | 2013-11-13 | 2014-10-24 | Chlorine bypass system and method for removing chlorine from cement kiln exhaust gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105745179A true CN105745179A (en) | 2016-07-06 |
Family
ID=53057250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480062116.6A Pending CN105745179A (en) | 2013-11-13 | 2014-10-24 | Chlorine bypass system and method for removing chlorine from cement kiln exhaust gas |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPWO2015072310A1 (en) |
| KR (1) | KR20160086325A (en) |
| CN (1) | CN105745179A (en) |
| WO (1) | WO2015072310A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106440843A (en) * | 2016-12-20 | 2017-02-22 | 北京建筑材料科学研究总院有限公司 | Method for taking air and heat from rotary kiln for synergic dichlorination and system for method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000146458A (en) * | 1998-11-05 | 2000-05-26 | Taiheiyo Cement Corp | Device and method for regulating chlorine concentration of bypass dust |
| JP2006089298A (en) * | 2004-09-21 | 2006-04-06 | Sumitomo Osaka Cement Co Ltd | Method and apparatus for disposing exhaust gas in cement firing facility |
| CN102620568A (en) * | 2011-01-31 | 2012-08-01 | 太平洋水泥株式会社 | Chlorine bypass system and method for treating extracted gas from chlorine bypass |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4434361B2 (en) | 1999-06-11 | 2010-03-17 | 太平洋セメント株式会社 | Method and apparatus for treating chlorine bypass dust |
| JP5213126B2 (en) | 2009-02-27 | 2013-06-19 | 太平洋セメント株式会社 | Chlorine bypass system |
-
2014
- 2014-10-24 KR KR1020167010371A patent/KR20160086325A/en not_active Application Discontinuation
- 2014-10-24 CN CN201480062116.6A patent/CN105745179A/en active Pending
- 2014-10-24 JP JP2015547716A patent/JPWO2015072310A1/en active Pending
- 2014-10-24 WO PCT/JP2014/078316 patent/WO2015072310A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000146458A (en) * | 1998-11-05 | 2000-05-26 | Taiheiyo Cement Corp | Device and method for regulating chlorine concentration of bypass dust |
| JP2006089298A (en) * | 2004-09-21 | 2006-04-06 | Sumitomo Osaka Cement Co Ltd | Method and apparatus for disposing exhaust gas in cement firing facility |
| CN102620568A (en) * | 2011-01-31 | 2012-08-01 | 太平洋水泥株式会社 | Chlorine bypass system and method for treating extracted gas from chlorine bypass |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106440843A (en) * | 2016-12-20 | 2017-02-22 | 北京建筑材料科学研究总院有限公司 | Method for taking air and heat from rotary kiln for synergic dichlorination and system for method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015072310A1 (en) | 2015-05-21 |
| JPWO2015072310A1 (en) | 2017-03-16 |
| KR20160086325A (en) | 2016-07-19 |
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