WO2015133161A1 - セメント焼成装置及びセメントキルン排ガスの脱硝方法 - Google Patents

セメント焼成装置及びセメントキルン排ガスの脱硝方法 Download PDF

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Publication number
WO2015133161A1
WO2015133161A1 PCT/JP2015/050310 JP2015050310W WO2015133161A1 WO 2015133161 A1 WO2015133161 A1 WO 2015133161A1 JP 2015050310 W JP2015050310 W JP 2015050310W WO 2015133161 A1 WO2015133161 A1 WO 2015133161A1
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WO
WIPO (PCT)
Prior art keywords
cement
fuel
kiln
cement kiln
exhaust gas
Prior art date
Application number
PCT/JP2015/050310
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
英人 鈴木
Original Assignee
太平洋エンジニアリング株式会社
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Application filed by 太平洋エンジニアリング株式会社 filed Critical 太平洋エンジニアリング株式会社
Priority to MYPI2016702815A priority Critical patent/MY183200A/en
Priority to KR1020167021574A priority patent/KR20160129842A/ko
Priority to JP2016506155A priority patent/JP6476165B2/ja
Priority to CN201580009148.4A priority patent/CN106029599A/zh
Publication of WO2015133161A1 publication Critical patent/WO2015133161A1/ja

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    • 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
    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/005—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • 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
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/44—Burning; Melting
    • 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
    • F27B7/34—Arrangements of heating devices

Definitions

  • the present invention relates to a technique for reducing the concentration of nitrogen oxides (hereinafter referred to as “NOx”) in combustion gas discharged from a cement kiln.
  • NOx nitrogen oxides
  • Cement kiln exhaust gas contains NOx due to the high temperature range of the calcining zone.
  • a denitration agent such as urea or ammonia is added, or it is reduced by combustion in a calcining furnace. NOx concentration is reduced.
  • the operation cost increases because urea is expensive.
  • the denitration efficiency is low only by adding urea, and surplus ammonia that has not reacted with NOx may be discharged out of the system as it is.
  • Patent Document 1 waste plastic containing a polyamide resin and a urea resin is put into a kiln bottom of a cement kiln and burned, and ammonia generated from the polyamide resin and urea generated from the urea resin are combustion gases.
  • the method of functioning as a non-catalytic denitration agent by being mixed with NOx and reducing the NOx concentration in the cement firing step is described.
  • Patent Document 2 the swirl strength of the swirling flow of the secondary air for combustion is adjusted in the calcining furnace, the secondary air containing the reducing gas and the kiln exhaust gas are mixed, A method for improving the denitration effect in the exhaust gas of cement kiln by appropriately setting the supply position of reburning air for reburning the remaining unburned portion and efficiently burning the unburned portion is described. .
  • the present invention has been made in view of the above problems in the prior art, and efficiently reduces the NOx concentration in the cement kiln exhaust gas while maintaining a good firing state regardless of the type of the calciner.
  • the purpose is to do.
  • the cement baking apparatus of the present invention is characterized by including a burner for injecting fuel and combustion air into the kiln bottom of a cement kiln and burning the fuel.
  • NOx in the cement kiln exhaust gas can be reduced in a low oxygen region in the kiln bottom, and the cement raw material is removed by burning the fuel. Carbonation efficiency can also be improved, and the NOx concentration in the cement kiln exhaust gas can be efficiently reduced while maintaining a good firing state regardless of the type of calcining furnace.
  • the burner may include a turning means for turning a mixed flow of the fuel and the combustion air.
  • the combustion efficiency of the fuel is improved, and the decarboxylation efficiency can be further improved.
  • the present invention is a denitration method for cement kiln exhaust gas, characterized in that fuel and combustion air are blown into the kiln bottom of the cement kiln and the fuel is combusted.
  • NOx in the exhaust gas from the cement kiln is reduced in the low oxygen region in the kiln bottom, and the decarbonation efficiency of the cement raw material is improved, and a good firing state is maintained regardless of the type of the calcining furnace.
  • the NOx concentration in the cement kiln exhaust gas can be efficiently reduced.
  • the amount of fuel supplied into the kiln bottom of the cement kiln can be 20% or more and less than 50% of the amount of fuel supplied to the calciner attached to the cement kiln.
  • the amount of fuel supplied into the kiln bottom of the cement kiln can be 20% or more and less than 50% of the amount of fuel supplied to the calciner attached to the cement kiln.
  • the NOx concentration in the cement kiln exhaust gas can be efficiently reduced while maintaining a good firing state regardless of the type of the calcining furnace.
  • FIG. 1 It is the schematic which shows one Embodiment of the cement kiln baking apparatus which concerns on this invention. It is a figure which shows the burner of FIG. 1, Comprising: (a) is sectional drawing, (b) is a side view, (c) is an expanded view of a burner front-end
  • FIG. 1 shows an embodiment of a cement firing apparatus according to the present invention.
  • This cement firing apparatus 1 includes a preheater 2 for preheating a cement raw material (hereinafter referred to as “raw material”) R, and a top heater 3.
  • the calcining furnace 3 for calcining the raw material R1 from the second cyclone 2b with the fuel F2 blown from the calcining furnace burner 13, and the raw material R2 from the lowermost cyclone 2a of the preheater 2 were blown from the main burner 15.
  • the configuration of the preheater 2, the calcining furnace 3, the cement kiln 5, the clinker cooler 6 and the like excluding the denitration burner 14 is the same as that of the conventional one.
  • the denitration burner 14 includes a cylindrical member 14h in which 6 to 10 swirling blades (swirling means) 14b are fixed at a tip end portion of a cylindrical main body 14a at a swivel angle of 10 to 50 degrees, and a cylindrical member 14h.
  • tip outer side of the cylindrical member 14h are provided.
  • the denitration burner 14 is covered with a refractory 14e on the tip side, and the mounting member 14c on the rear end side of the main body 14a and the surface 4a of the kiln butt 4 are coupled by a bracket 14d and attached to the kiln butt 4. .
  • the kiln bottom 4 is also protected by the refractory 4b.
  • the turning angle is defined by the axial direction 14m of the denitration burner 14 and the center line 14g of the turning blade 14b when the cylindrical member 14h is expanded in a plane.
  • the angle ⁇ corresponds to the turning angle of the solid powder fuel flow F at the tip 14k of the flow path.
  • the number of swirl blades 14b and the swivel angle can be changed as appropriate.
  • the raw material R is preheated by using the exhaust gas G from the cement kiln 5 in the preheater 2 of the cement baking apparatus 1, and the raw material R1 from the cyclone 2 b of the preheater 2 is calcined in the calcining furnace 3.
  • the fuel F2 is burned by blowing the tertiary air G1 from the clinker cooler 6 together with the fuel F2 from the calciner burner 13.
  • pulverized coal, heavy oil, or the like may be used, and flammable waste may be used for a part or all of the fuel F2.
  • the fuel F3 is also blown together with the combustion air from the denitration burner 14 installed in the kiln bottom 4 of the cement kiln 5 to burn the fuel F3.
  • pulverized coal, heavy oil, and combustible waste can be used for the fuel F3, and any one or more of these may be used simultaneously.
  • the ratio of the fuel F2 for the calciner 3 and the fuel F3 blown from the denitration burner 14 is adjusted to 20% or more and less than 50%.
  • the ratio of the fuel F3 is less than 20%, the denitration effect is lowered, and when the ratio of the fuel F3 is more than 50%, the decarboxylation efficiency of the raw material R3 in the calciner 3 is not preferable.
  • a fuel F1 such as pulverized coal is blown from the main burner 15 of the cement kiln 5
  • the raw material R2 from the cyclone 2a of the preheater 2 is fired, and the resulting clinker is cooled by the clinker cooler 6 to remove the cement clinker CL. obtain.
  • the swirl vane 14b is provided at the tip of the main body 14a of the denitration burner 14, but the swirl vane 14b is not necessarily installed, and the fuel F3 does not swirl the combustion air. At the same time, it can be blown into the kiln bottom 4.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental Sciences (AREA)
  • Public Health (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Treating Waste Gases (AREA)
  • Furnace Details (AREA)
PCT/JP2015/050310 2014-03-06 2015-01-08 セメント焼成装置及びセメントキルン排ガスの脱硝方法 WO2015133161A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
MYPI2016702815A MY183200A (en) 2014-03-06 2015-01-08 Cement burning apparatus and method for denitrifying cement kiln exhaust gas
KR1020167021574A KR20160129842A (ko) 2014-03-06 2015-01-08 시멘트 소성 장치 및 시멘트 킬른 배기 가스의 탈질 방법
JP2016506155A JP6476165B2 (ja) 2014-03-06 2015-01-08 セメント焼成装置及びセメントキルン排ガスの脱硝方法
CN201580009148.4A CN106029599A (zh) 2014-03-06 2015-01-08 水泥烧成装置及水泥窑排气的脱硝方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-043557 2014-03-06
JP2014043557 2014-03-06

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WO2015133161A1 true WO2015133161A1 (ja) 2015-09-11

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JP (1) JP6476165B2 (zh)
KR (1) KR20160129842A (zh)
CN (1) CN106029599A (zh)
MY (1) MY183200A (zh)
WO (1) WO2015133161A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018025482A1 (ja) * 2016-08-05 2018-02-08 太平洋エンジニアリング株式会社 セメントキルンの運転方法
TWI667061B (zh) * 2018-08-15 2019-08-01 東服企業股份有限公司 Exhaust gas introduction device
CN111514726A (zh) * 2019-02-02 2020-08-11 广东万引科技发展有限公司 一种新型干法水泥窑用复合生物质脱硝剂、其使用方法以及脱硝系统
WO2021019753A1 (ja) * 2019-08-01 2021-02-04 太平洋エンジニアリング株式会社 セメント焼成装置及びセメントキルン排ガスの脱硝方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7278385B2 (ja) 2019-08-06 2023-05-19 太平洋エンジニアリング株式会社 可燃物の処理方法及び処理装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58202033A (ja) * 1983-04-25 1983-11-25 Nippon Cement Co Ltd 粉粒体原料の仮焼装置
JPS60137857A (ja) * 1983-12-23 1985-07-22 株式会社神戸製鋼所 セメント原料粉末の多段式仮焼方法
JPS6168129A (ja) * 1984-09-10 1986-04-08 Kobe Steel Ltd セメント焼成炉排ガスの脱硝方法
JP2006298685A (ja) * 2005-04-19 2006-11-02 Kawai Sekkai Kogyo Kk 生石灰・軽焼ドロマイトの製造方法
JP2008222504A (ja) * 2007-03-14 2008-09-25 Taiheiyo Cement Corp セメントクリンカの焼成方法及びセメントクリンカ焼成装置
CN102923979A (zh) * 2012-10-19 2013-02-13 安徽海螺建材设计研究院 新型干法水泥窑熟料生产线及其脱硝工艺方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05207474A (ja) 1992-01-24 1993-08-13 Fujitsu General Ltd Ｃｓ／ｂｓチューナ
JP3768070B2 (ja) 2000-05-22 2006-04-19 川崎重工業株式会社 セメント原料の仮焼装置
CN103591578A (zh) * 2012-08-16 2014-02-19 郑州奥通热力工程有限公司 新型分解炉扩散型煤粉燃烧器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58202033A (ja) * 1983-04-25 1983-11-25 Nippon Cement Co Ltd 粉粒体原料の仮焼装置
JPS60137857A (ja) * 1983-12-23 1985-07-22 株式会社神戸製鋼所 セメント原料粉末の多段式仮焼方法
JPS6168129A (ja) * 1984-09-10 1986-04-08 Kobe Steel Ltd セメント焼成炉排ガスの脱硝方法
JP2006298685A (ja) * 2005-04-19 2006-11-02 Kawai Sekkai Kogyo Kk 生石灰・軽焼ドロマイトの製造方法
JP2008222504A (ja) * 2007-03-14 2008-09-25 Taiheiyo Cement Corp セメントクリンカの焼成方法及びセメントクリンカ焼成装置
CN102923979A (zh) * 2012-10-19 2013-02-13 安徽海螺建材设计研究院 新型干法水泥窑熟料生产线及其脱硝工艺方法

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018025482A1 (ja) * 2016-08-05 2018-02-08 太平洋エンジニアリング株式会社 セメントキルンの運転方法
JPWO2018025482A1 (ja) * 2016-08-05 2019-07-04 太平洋エンジニアリング株式会社 セメントキルンの運転方法
TWI667061B (zh) * 2018-08-15 2019-08-01 東服企業股份有限公司 Exhaust gas introduction device
CN111514726A (zh) * 2019-02-02 2020-08-11 广东万引科技发展有限公司 一种新型干法水泥窑用复合生物质脱硝剂、其使用方法以及脱硝系统
CN111514726B (zh) * 2019-02-02 2024-01-26 广东万引科技发展有限公司 一种新型干法水泥窑用复合生物质脱硝剂、其使用方法以及脱硝系统
WO2021019753A1 (ja) * 2019-08-01 2021-02-04 太平洋エンジニアリング株式会社 セメント焼成装置及びセメントキルン排ガスの脱硝方法
JPWO2021019753A1 (zh) * 2019-08-01 2021-02-04
JP7202467B2 (ja) 2019-08-01 2023-01-11 太平洋エンジニアリング株式会社 セメントキルン排ガスの脱硝方法

Also Published As

Publication number Publication date
CN106029599A (zh) 2016-10-12
MY183200A (en) 2021-02-18
JP6476165B2 (ja) 2019-03-06
KR20160129842A (ko) 2016-11-09
JPWO2015133161A1 (ja) 2017-04-06

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