JP2008006355A - Drying method of cement burning apparatus and high-moisture organic waste - Google Patents
Drying method of cement burning apparatus and high-moisture organic waste Download PDFInfo
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- JP2008006355A JP2008006355A JP2006177618A JP2006177618A JP2008006355A JP 2008006355 A JP2008006355 A JP 2008006355A JP 2006177618 A JP2006177618 A JP 2006177618A JP 2006177618 A JP2006177618 A JP 2006177618A JP 2008006355 A JP2008006355 A JP 2008006355A
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本発明は、高含水有機汚泥等の高含水有機廃棄物を、安全かつ効率的に乾燥させることのできるセメント焼成装置、及び同装置を利用した高含水有機廃棄物の乾燥方法に関する。 The present invention relates to a cement baking apparatus capable of safely and efficiently drying high water content organic waste such as high water content organic sludge, and a method for drying high water content organic waste using the same device.
従来、都市ごみ等の廃棄物をセメント焼成装置で処理するにあたって、種々の装置及び方法が提案されている。例えば、特許文献1には、都市ごみ等の廃棄物を乾燥させるための乾燥装置にクリンカクーラの高温空気の一部を導入し、乾燥装置からの排気を再びクリンカクーラに戻し、乾燥装置の排気が混入したクリンカクーラの高温空気をセメントキルン又は仮焼炉の燃焼用空気として使用する技術が開示されている。
Conventionally, various apparatuses and methods have been proposed in treating waste such as municipal waste with a cement baking apparatus. For example, in
また、特許文献2には、セメント焼成装置で可燃性廃棄物を焼却するにあたって、可燃性廃棄物をクリンカクーラの高温空気の一部を用いて焼却し、廃棄物の焼却工程中に生成された排ガスを、セメント原料を加熱するためのプレヒータに通気し、かつ廃棄物の焼却工程中に発生したスラグを引き出す技術が記載されている。 Moreover, in patent document 2, when incinerating combustible waste with a cement baking apparatus, combustible waste was incinerated using a part of high temperature air of a clinker cooler, and was produced | generated during the incineration process of waste. A technique is described in which exhaust gas is passed through a preheater for heating cement raw material and slag generated during the incineration process of waste is drawn out.
しかし、上記特許文献に記載のように、クリンカクーラから抽気される高温空気を都市ごみ等の廃棄物や、可燃性廃棄物の乾燥等に利用する場合には問題はないが、高含水有機汚泥等の高含水有機廃棄物を乾燥させるにあたって上記高温空気を利用すると、該高温空気は酸素濃度が高いため、爆発のおそれがあった。 However, as described in the above-mentioned patent document, there is no problem when high-temperature air extracted from the clinker cooler is used for waste such as municipal waste or drying of combustible waste. When the above-mentioned high-temperature air is used for drying a highly water-containing organic waste, such as high-temperature air, the high-temperature air has a high oxygen concentration, which may cause an explosion.
また、セメント焼成装置のプレヒータ出口以降の燃焼排ガスを利用しようとしても、この領域の燃焼排ガスの温度は450℃程度以下と低温であるため、高含水汚泥の乾燥には適さない。 Moreover, even if it is going to utilize the combustion exhaust gas after the preheater exit of a cement baking apparatus, since the temperature of the combustion exhaust gas of this area | region is about 450 degrees C or less, it is not suitable for drying of a high water content sludge.
さらに、セメントキルンの窯尻からの抽気ガスは、酸素濃度が低く、約1000℃と高温であるため、高含水有機廃棄物の乾燥には適しているが、窯尻から燃焼ガスを抽気すると、セメントキルンの熱効率が悪化するという問題があった。 Furthermore, the extraction gas from the kiln bottom of the cement kiln is suitable for drying high water content organic waste because of its low oxygen concentration and high temperature of about 1000 ° C., but when the combustion gas is extracted from the kiln bottom, There was a problem that the thermal efficiency of the cement kiln deteriorated.
上記に加え、有機汚泥等を乾燥させた後に発生する乾燥排ガスは、相当量の臭気成分を含有しているため、脱臭処理後に排気する必要がある。脱臭処理を行うためには、臭気成分を含むガスを800℃以上にすることが好ましく、仮焼炉等の燃焼領域にガスを導き脱臭処理する方法が一般的である。しかし、有機汚泥等の乾燥にセメントキルン排ガスを用いると、乾燥排ガスは低酸素濃度であるため、上述のように乾燥排ガスを燃焼領域で処理すると、燃焼状態が悪化し、セメントキルンの熱効率が低下するため適さないという問題があった。 In addition to the above, the dry exhaust gas generated after drying organic sludge and the like contains a considerable amount of odor components, and therefore needs to be exhausted after the deodorization treatment. In order to perform a deodorizing process, it is preferable to make the gas containing an odor component into 800 degreeC or more, and the method of deodorizing by introducing gas into combustion areas, such as a calcining furnace, is common. However, when cement kiln exhaust gas is used for drying organic sludge, etc., the dry exhaust gas has a low oxygen concentration. Therefore, if the dry exhaust gas is treated in the combustion region as described above, the combustion state deteriorates and the thermal efficiency of the cement kiln decreases. Therefore, there was a problem that it was not suitable.
そこで、本発明は、上記従来の技術における問題点に鑑みてなされたものであって、高含水有機汚泥等の高含水有機廃棄物を乾燥させるにあたって、爆発のおそれがなく、セメントキルンの熱効率が悪化することもないセメント焼成装置及び高含水有機廃棄物の乾燥方法を提供することを目的とする。 Therefore, the present invention has been made in view of the above problems in the prior art, and there is no risk of explosion when drying high water content organic waste such as high water content organic sludge, and the thermal efficiency of the cement kiln is improved. It aims at providing the drying method of the cement baking apparatus and high water content organic waste which does not deteriorate.
上記目的を達成するため、本発明は、セメント焼成装置であって、セメントキルンの仮焼炉の出口ダクトからプレヒータの出口ダクトまでの排ガス流路より抽気した燃焼ガスが供給され、40質量%以上の水分を含む高含水有機廃棄物を乾燥させる乾燥装置を備えることを特徴とする。 In order to achieve the above object, the present invention is a cement firing apparatus, which is supplied with a combustion gas extracted from an exhaust gas passage from an outlet duct of a cement kiln calcining furnace to an outlet duct of a preheater, and is 40% by mass or more. It comprises a drying device for drying high water content organic waste containing water.
セメントキルンの仮焼炉の出口ダクトからプレヒータの出口ダクトまでの排ガス流路より抽気した燃焼ガスは、2〜8%と酸素濃度が低いため、乾燥装置が爆発するおそれがなく、燃焼ガスの温度は450〜900℃であるため、高含水有機廃棄物を十分に乾燥させることができる。また、セメントキルンの窯尻等から燃焼ガスを抽気しないため、セメントキルンの熱効率が悪化することもない。 The combustion gas extracted from the exhaust gas flow path from the cement kiln calcining furnace outlet duct to the preheater outlet duct has a low oxygen concentration of 2 to 8%. Since it is 450-900 degreeC, a high water content organic waste can fully be dried. Further, since the combustion gas is not extracted from the kiln bottom of the cement kiln, the thermal efficiency of the cement kiln is not deteriorated.
前記セメント焼成装置において、前記乾燥装置からの排ガスを、前記セメントキルンの仮焼炉の出口ダクトからプレヒータの出口ダクトまでの排ガス流路へ戻すための第2の排ガス流路を備えることができる。これによって、臭気成分を含む酸素濃度の低い乾燥排ガスを仮焼炉等の燃焼領域に導いて脱臭処理せずに済むため、キルンの熱効率の悪化を引き起こすこともない。 The cement baking apparatus may include a second exhaust gas flow path for returning the exhaust gas from the drying apparatus to an exhaust gas flow path from an outlet duct of the calcining furnace of the cement kiln to an outlet duct of the preheater. This eliminates the need for deodorizing the dried exhaust gas having a low oxygen concentration containing an odor component to a combustion region such as a calcining furnace, so that the thermal efficiency of the kiln is not deteriorated.
前記セメント焼成装置において、前記高含水有機廃棄物は、高含水有機汚泥であってもよく、製紙汚泥、下水汚泥、ビルピット汚泥、食品汚泥等を乾燥させることができる。 In the cement baking apparatus, the high water content organic waste may be high water content organic sludge, and papermaking sludge, sewage sludge, bill pit sludge, food sludge and the like can be dried.
また、本発明は、高含水有機廃棄物の乾燥方法であって、セメントキルンの仮焼炉の出口ダクトからプレヒータの出口ダクトまでの排ガス流路より、燃焼ガスの一部を抽気し、該抽気した燃焼ガスの一部を用いて40質量%以上の水分を含む高含水有機廃棄物を乾燥させることを特徴とする。これによって、上述のように、爆発のおそれがなく、セメントキルンの熱効率が悪化することもなく、高含水有機廃棄物を安全かつ効率的に乾燥させることができる。 The present invention also relates to a method for drying a high water content organic waste, wherein a part of the combustion gas is extracted from an exhaust gas passage from an exit duct of a cement kiln calcining furnace to an exit duct of a preheater, A high water content organic waste containing 40% by mass or more of moisture is dried using a part of the burned gas. Thereby, as described above, there is no risk of explosion, and the thermal efficiency of the cement kiln is not deteriorated, so that the high water content organic waste can be dried safely and efficiently.
前記高含水有機廃棄物の乾燥方法において、前記高含水有機廃棄物を乾燥させた後の燃焼ガスを、前記セメントキルンの仮焼炉の出口ダクトからプレヒータの出口ダクトまでの排ガス流路に戻すことができる。これによって、上述のように、キルンの熱効率の悪化を引き起こすことなく、臭気成分を有する乾燥排ガスを処理することができる。 In the method of drying the high water content organic waste, the combustion gas after drying the high water content organic waste is returned to the exhaust gas flow path from the cement kiln calcining furnace outlet duct to the preheater outlet duct. Can do. Thereby, as described above, dry exhaust gas having an odor component can be treated without causing deterioration of the thermal efficiency of the kiln.
前記高含水有機廃棄物の乾燥方法において、前記高含水有機廃棄物を、製紙汚泥、下水汚泥、ビルピット汚泥、食品汚泥等の高含水有機汚泥とすることができる。 In the drying method of the high water content organic waste, the high water content organic waste can be a high water content organic sludge such as papermaking sludge, sewage sludge, bill pit sludge, food sludge and the like.
以上のように、本発明によれば、高含水有機汚泥等の高含水有機廃棄物を乾燥させるにあたって、爆発のおそれがなく、セメントキルンの熱効率が悪化することもないセメント焼成装置及び高含水有機廃棄物の乾燥方法を提供することができる。 As described above, according to the present invention, when drying high water content organic waste such as high water content organic sludge, there is no risk of explosion and the heat efficiency of the cement kiln is not deteriorated. A method for drying waste can be provided.
図1は、本発明にかかるセメント焼成装置の一実施の形態を示し、このセメント焼成装置1は、セメントキルン2と、プレヒータ3と、仮焼炉4と、乾燥装置6と、ファン7等で構成される。
FIG. 1 shows an embodiment of a cement baking apparatus according to the present invention. The
セメントキルン2、プレヒータ3及び仮焼炉4は、従来のセメント焼成装置と同様の機能を有し、プレヒータ3に供給されたセメント原料Rは、プレヒータ3で予熱され、仮焼炉4で仮焼された後、セメントキルン2にて焼成される。
The cement kiln 2, the
乾燥装置6には、高含水有機汚泥等の高含水有機廃棄物(以下、「廃棄物」という)Wが供給されるとともに、最下段サイクロン3Aから第2サイクロン3Bへの排ガス流路より抽気した燃焼ガスが供給され、廃棄物Wの乾燥が行なわれる。この燃焼ガスは、2〜8%程度と酸素濃度が低いため、乾燥装置6が爆発するおそれはない。また、この燃焼ガスの温度は、800〜900℃程度であるため、高含水有機廃棄物を十分に乾燥させることができる。乾燥された廃棄物Wは、セメント焼成装置1において処理してもよく、セメント焼成装置1の系外で処理してもよい。
The
ファン7は、プレヒータ3から燃焼ガスを乾燥装置6に導入するために備えられ、ファン7の排気は、循環ダクト8を介して最下段サイクロン3Aから第2サイクロン3Bへの排ガス流路に戻される。これによって、有機汚泥等を乾燥させた後に発生する乾燥排ガスが含有する臭気成分の脱臭処理を行う。
The fan 7 is provided to introduce combustion gas from the
尚、上記実施の形態においては、乾燥装置6に、最下段サイクロン3Aから第2サイクロン3Bへの排ガス流路より抽気した燃焼ガスを供給したが、プレヒータ3のさらに上流の、第2サイクロン3Bから第3サイクロン3Cへの排ガス流路(燃焼ガス温度は、700〜800℃程度)、又は第3サイクロン3Cから第4サイクロン3Dへの排ガス流路(燃焼ガス温度は、550℃〜650程度)から燃焼ガスを抽気して乾燥装置6に供給することもできる。また、乾燥装置6からの乾燥排ガスについても、最下段サイクロン3Aから第2サイクロン3Bへの排ガス流路に戻す場合に限定されず、上記燃焼ガスを抽気する場合と同様の領域に戻すことができる。
In the above embodiment, the combustion gas extracted from the exhaust gas flow path from the
1 セメント焼成装置
2 セメントキルン
3 プレヒータ
3A 最下段サイクロン
3B 第2サイクロン
3C 第3サイクロン
3D 第4サイクロン
4 仮焼炉
5 窯尻部
6 乾燥装置
7 ファン
8 循環ダクト
R セメント原料
W 高含水有機廃棄物(高含水有機汚泥)
DESCRIPTION OF
Claims (6)
該抽気した燃焼ガスの一部を用いて40質量%以上の水分を含む高含水有機廃棄物を乾燥させることを特徴とする高含水有機廃棄物の乾燥方法。 A part of the combustion gas is extracted from the exhaust gas flow path from the exit duct of the cement kiln calcining furnace to the exit duct of the preheater,
A method for drying a high water content organic waste, comprising drying a high water content organic waste containing 40% by mass or more of moisture using a part of the extracted combustion gas.
Priority Applications (9)
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JP2006177618A JP5142351B2 (en) | 2006-06-28 | 2006-06-28 | Cement baking apparatus and method for drying high water content organic waste |
TW096123054A TWI422556B (en) | 2006-06-28 | 2007-06-26 | Cement burning apparatus and method of drying organic waste with high water content |
KR1020097000842A KR101354966B1 (en) | 2006-06-28 | 2007-06-26 | Cement calcination apparatus and method of drying highly hydrous organic waste |
ES07767557T ES2403370T3 (en) | 2006-06-28 | 2007-06-26 | Calcination and cement apparatus and drying process for highly aqueous organic waste |
PCT/JP2007/062751 WO2008001746A1 (en) | 2006-06-28 | 2007-06-26 | Cement calcination apparatus and method of drying highly hydrous organic waste |
US12/306,708 US20100032385A1 (en) | 2006-06-28 | 2007-06-26 | Cement burning apparatus and method of drying high-water-content organic waste |
CN200780000896.1A CN101346316B (en) | 2006-06-28 | 2007-06-26 | Cement calcination apparatus and method of drying highly hydrous organic waste |
EP07767557A EP2039660B1 (en) | 2006-06-28 | 2007-06-26 | Cement calcination apparatus and method of drying highly hydrous organic waste |
PL07767557T PL2039660T3 (en) | 2006-06-28 | 2007-06-26 | Cement calcination apparatus and method of drying highly hydrous organic waste |
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JP2006177618A JP5142351B2 (en) | 2006-06-28 | 2006-06-28 | Cement baking apparatus and method for drying high water content organic waste |
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Cited By (1)
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JP2011046576A (en) * | 2009-08-28 | 2011-03-10 | Taiheiyo Cement Corp | Fertilizer, method and apparatus for manufacturing the same |
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CN103939912B (en) * | 2014-04-24 | 2016-01-13 | 尹小林 | Dry-process rotary kiln associated treatment is containing wet refuse bypass electrification technique as well as and system |
CN110557945A (en) * | 2018-04-04 | 2019-12-10 | 太平洋工程株式会社 | Organic sludge treatment device and treatment method |
CN110553269A (en) * | 2019-08-14 | 2019-12-10 | 航天环境工程有限公司 | High and low calorific value hazardous waste collaborative incineration melting harmless treatment system and application |
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JPH09227184A (en) * | 1996-02-21 | 1997-09-02 | Chichibu Onoda Cement Corp | Treating of exhaust gas from cement kiln and apparatus therefor |
JP2000239050A (en) * | 1999-02-19 | 2000-09-05 | Taiheiyo Cement Corp | Treatment of plant waste fluid |
JP2002273480A (en) * | 2001-03-22 | 2002-09-24 | Kawasaki Heavy Ind Ltd | Method and equipment for treating sludge |
JP2004244308A (en) * | 2003-01-22 | 2004-09-02 | Taiheiyo Cement Corp | Method and system for treating exhaust gas in cement manufacturing plant |
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WO2008001747A1 (en) * | 2006-06-28 | 2008-01-03 | Taiheiyo Cement Corporation | Cement burning apparatus and method of drying highly hydrous organic waste |
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2006
- 2006-06-28 JP JP2006177618A patent/JP5142351B2/en active Active
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JPS62283850A (en) * | 1986-05-29 | 1987-12-09 | 株式会社神戸製鋼所 | Powder raw material burning apparatus |
JPH09227184A (en) * | 1996-02-21 | 1997-09-02 | Chichibu Onoda Cement Corp | Treating of exhaust gas from cement kiln and apparatus therefor |
JP2000239050A (en) * | 1999-02-19 | 2000-09-05 | Taiheiyo Cement Corp | Treatment of plant waste fluid |
JP2002273480A (en) * | 2001-03-22 | 2002-09-24 | Kawasaki Heavy Ind Ltd | Method and equipment for treating sludge |
JP2004244308A (en) * | 2003-01-22 | 2004-09-02 | Taiheiyo Cement Corp | Method and system for treating exhaust gas in cement manufacturing plant |
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WO2008001747A1 (en) * | 2006-06-28 | 2008-01-03 | Taiheiyo Cement Corporation | Cement burning apparatus and method of drying highly hydrous organic waste |
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JP2011046576A (en) * | 2009-08-28 | 2011-03-10 | Taiheiyo Cement Corp | Fertilizer, method and apparatus for manufacturing the same |
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CN101346316B (en) | 2011-11-16 |
CN101346316A (en) | 2009-01-14 |
JP5142351B2 (en) | 2013-02-13 |
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