WO2015072310A1 - 塩素バイパスシステム及びセメントキルン排ガス中の塩素除去方法 - Google Patents
塩素バイパスシステム及びセメントキルン排ガス中の塩素除去方法 Download PDFInfo
- Publication number
- WO2015072310A1 WO2015072310A1 PCT/JP2014/078316 JP2014078316W WO2015072310A1 WO 2015072310 A1 WO2015072310 A1 WO 2015072310A1 JP 2014078316 W JP2014078316 W JP 2014078316W WO 2015072310 A1 WO2015072310 A1 WO 2015072310A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cement kiln
- chlorine
- coarse powder
- gas
- firing system
- Prior art date
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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
Definitions
- the present invention relates to a chlorine bypass system for removing a portion of combustion gas from the kiln exhaust gas flow path from the butt of cement kiln to the lowermost cyclone of the preheater to remove chlorine, and a method for removing chlorine from cement kiln exhaust gas About.
- This chlorine bypass system simultaneously extracts part G1 of the combustion gas with the probe 3 from the kiln exhaust gas flow path from the butt of cement kiln 2 to the lowermost cyclone (not shown).
- the extracted gas G1 is quenched by the cold air A from the cooling fan 4 and the chlorine-concentrated fine powder D2 contained in the extracted gas G3 after the coarse powder D1 is separated by the cyclone 5 is recovered by the bag filter 8 as the fine powder D4.
- the fine powder D4 and the fine powder D3 recovered from the cooler 6 are temporarily stored in the storage tank 9 as chlorine bypass dust D5, and then discharged out of the system to efficiently remove chlorine (Patent Documents 1 and 2).
- the present invention has been made in view of the problems in the above-mentioned prior art, and it is an object of the present invention to provide a chlorine bypass system capable of flexible operation according to the situation and a method of removing chlorine in cement kiln exhaust gas. To aim.
- the distribution device can distribute the crude powder separated by the classification device into a route for returning the raw material to the firing system of the cement kiln and a route for discharging the firing system from the cement kiln. It can be done.
- flexible operation can be performed according to the chlorine concentration of the raw material supplied to a cement kiln, the operation condition of a cement kiln, etc.
- the ratio of returning the separated coarse powder to the firing system of the cement kiln or the ratio of discharging the firing powder from the firing system of the cement kiln is the raw material chlorine supplied to the cement kiln It can be adjusted according to the concentration or the operating condition of the cement kiln.
- the fine powder can be recovered from the separated fine powder and gas, and can be combined with the coarse powder discharged from the firing system of the cement kiln, and the processing cost is achieved by simultaneously treating the distributed coarse powder and the fine powder. Can be reduced.
- the storage tank 11 is provided with a rotary feeder 12 at the bottom and an outlet 11a for discharging the coarse powder D6 in the cone.
- a rotary feeder may be installed at the outlet 11a.
- the rotary feeder 12 includes a rotor capable of controlling the number of rotations, and can control the discharge amount of the coarse powder D7 from the storage tank 11 by controlling the number of rotations of the rotor. In addition, it can replace with the rotary feeder 12 and can also use another discharge device.
- the bleed gas G2 is introduced into the cyclone 5 and separated into coarse powder D1 and bleed gas G3 containing fine powder D2, and the coarse powder D1 is supplied to the storage tank 11, and the bleed gas G3 is 100 by the cooler 6. Cool to ⁇ 200 ° C.
- the exhaust gas G4 of the cooler 6 is introduced into the bag filter 8 to recover the fine powder D4, and together with the fine powder D3 recovered from the cooler 6, is made into the chlorine bypass dust D5.
- the exhaust gas G5 of the bag filter 8 is returned to the exhaust system of the cement kiln 2 by the exhaust fan 10.
- a part of the coarse powder D1 stored in the storage tank 11 (coarse powder D7) is discharged by the rotary feeder 12, transported by the screw conveyor 13, merged with the chlorine bypass dust D5 and stored in the storage tank 9, and the chlorine concentration is compared If the amount is too low, it is crushed together with cement clinker with a cement crusher to produce a cement, and if the chlorine concentration is high, it can be used as a cement raw material after being washed with water to remove chlorine.
- the coarse powder D6 overflows and is discharged from the discharge port 11a of the storage tank 11, and is led to the route returned to the firing system of the cement kiln 2 and used as a cement raw material.
- the amount of coarse powder D7 to be combined with the chlorine bypass dust D5 is increased.
- the chlorine content in the coarse powder D7 is also discharged from the firing system of the cement kiln 2 to the outside of the system, more chlorine content can be removed.
- it can respond, without changing the extraction amount of the gas by the probe 3, ie, without changing a bypass rate, and can minimize the heat loss of cement baking.
- the coarse powder D1 separated by the cyclone 5 is returned to the firing system of the cement kiln 2 according to the operating condition of the cement firing apparatus including the cement kiln 2 in addition to the increase and decrease of the chlorine concentration of the raw material supplied to the cement kiln 2 It can be distributed to the route and the route discharging from the baking system, and this operation can be implemented only by controlling the number of rotations of the rotor of the rotary feeder 12, and the distribution rate can be adjusted quickly and easily. it can.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Environmental Sciences (AREA)
- Ecology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Public Health (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
2 セメントキルン
3 プローブ
4 冷却ファン
5 サイクロン
6 冷却器
8 バグフィルタ
9 貯槽
10 排気ファン
11 貯槽
11a 排出口
12 ロータリフィーダ
13 スクリューコンベア
Claims (6)
- セメントキルンの窯尻からプレヒータの最下段サイクロンに至るまでのキルン排ガス流路より燃焼排ガスの一部を抽気するプローブと、
該プローブによる抽気ガスを、粗粉と、微粉及びガスとに分離する分級装置と、
該分級装置によって分離された粗粉を前記セメントキルンの焼成系統へ戻すルートと、前記セメントキルンの焼成系統から排出するルートとに分配する分配装置とを備えることを特徴とする塩素バイパスシステム。 - 前記分配装置は、前記分級装置によって分離された粗粉を前記セメントキルンの焼成系統へ戻すルートと、前記セメントキルンの焼成系統から排出するルートとに任意の比率で分配可能であることを特徴とする請求項1に記載の塩素バイパスシステム。
- 前記分級装置によって分離された微粉及びガスから微粉を回収する集塵装置を備え、
前記分配装置で前記セメントキルンの焼成系統から排出するルートに分配された粗粉を、前記集塵装置で回収された微粉と合流させることを特徴とする請求項1又は2に記載の塩素バイパスシステム。 - セメントキルンの窯尻からプレヒータの最下段サイクロンに至るまでのキルン排ガス流路より燃焼排ガスの一部を抽気し、
該抽気ガスを、粗粉と、微粉及びガスとに分離し、
該分離された粗粉の一部を前記セメントキルンの焼成系統へ戻し、前記分離された粗粉の残りを前記セメントキルンの焼成系統から排出することを特徴とするセメントキルン排ガス中の塩素除去方法。 - 前記分離された粗粉を前記セメントキルンの焼成系統へ戻す比率又は前記セメントキルンの焼成系統から排出する比率を、前記セメントキルンに供給される原料の塩素濃度又は該セメントキルンの運転状況に応じて調整することを特徴とする請求項4に記載のセメントキルン排ガス中の塩素除去方法。
- 前記分離された微粉及びガスから微粉を回収し、前記セメントキルンの焼成系統から排出された粗粉と合流させることを特徴とする請求項4又は5に記載のセメントキルン排ガス中の塩素除去方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN201480062116.6A CN105745179A (zh) | 2013-11-13 | 2014-10-24 | 氯旁支系统及水泥窑排气中的氯除去方法 |
JP2015547716A JPWO2015072310A1 (ja) | 2013-11-13 | 2014-10-24 | 塩素バイパスシステム及びセメントキルン排ガス中の塩素除去方法 |
KR1020167010371A KR20160086325A (ko) | 2013-11-13 | 2014-10-24 | 염소 바이패스 시스템 및 시멘트 킬른 배기 가스 중의 염소 제거 방법 |
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JP2013234902 | 2013-11-13 | ||
JP2013-234902 | 2013-11-13 |
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WO2015072310A1 true WO2015072310A1 (ja) | 2015-05-21 |
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PCT/JP2014/078316 WO2015072310A1 (ja) | 2013-11-13 | 2014-10-24 | 塩素バイパスシステム及びセメントキルン排ガス中の塩素除去方法 |
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JP (1) | JPWO2015072310A1 (ja) |
KR (1) | KR20160086325A (ja) |
CN (1) | CN105745179A (ja) |
WO (1) | WO2015072310A1 (ja) |
Cited By (1)
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JP2017145166A (ja) * | 2016-02-17 | 2017-08-24 | 太平洋セメント株式会社 | 塩素バイパス抽気ダストの処理方法及び処理装置 |
Families Citing this family (1)
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CN106440843B (zh) * | 2016-12-20 | 2018-05-29 | 北京建筑材料科学研究总院有限公司 | 一种从回转窑取风取热协同除氯的方法及其系统 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2000146458A (ja) * | 1998-11-05 | 2000-05-26 | Taiheiyo Cement Corp | バイパスダストの塩素濃度調整装置及び方法 |
JP2006089298A (ja) * | 2004-09-21 | 2006-04-06 | Sumitomo Osaka Cement Co Ltd | セメント焼成設備における排ガスの処理方法及び処理装置 |
Family Cites Families (3)
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JP4434361B2 (ja) | 1999-06-11 | 2010-03-17 | 太平洋セメント株式会社 | 塩素バイパスダストの処理方法及びその装置 |
JP5213126B2 (ja) | 2009-02-27 | 2013-06-19 | 太平洋セメント株式会社 | 塩素バイパスシステム |
CN106524773A (zh) * | 2011-01-31 | 2017-03-22 | 太平洋水泥株式会社 | 氯旁通系统和氯旁通抽气气体的处理方法 |
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- 2014-10-24 WO PCT/JP2014/078316 patent/WO2015072310A1/ja active Application Filing
- 2014-10-24 JP JP2015547716A patent/JPWO2015072310A1/ja active Pending
- 2014-10-24 CN CN201480062116.6A patent/CN105745179A/zh active Pending
- 2014-10-24 KR KR1020167010371A patent/KR20160086325A/ko not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000146458A (ja) * | 1998-11-05 | 2000-05-26 | Taiheiyo Cement Corp | バイパスダストの塩素濃度調整装置及び方法 |
JP2006089298A (ja) * | 2004-09-21 | 2006-04-06 | Sumitomo Osaka Cement Co Ltd | セメント焼成設備における排ガスの処理方法及び処理装置 |
Cited By (1)
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JP2017145166A (ja) * | 2016-02-17 | 2017-08-24 | 太平洋セメント株式会社 | 塩素バイパス抽気ダストの処理方法及び処理装置 |
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KR20160086325A (ko) | 2016-07-19 |
CN105745179A (zh) | 2016-07-06 |
JPWO2015072310A1 (ja) | 2017-03-16 |
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