JPH0650505A - Desulfurizing agent used both for fuel and manufacture thereof - Google Patents
Desulfurizing agent used both for fuel and manufacture thereofInfo
- Publication number
- JPH0650505A JPH0650505A JP4205502A JP20550292A JPH0650505A JP H0650505 A JPH0650505 A JP H0650505A JP 4205502 A JP4205502 A JP 4205502A JP 20550292 A JP20550292 A JP 20550292A JP H0650505 A JPH0650505 A JP H0650505A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- fuel
- desulfurizing agent
- slaked lime
- calcined dolomite
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Gasification And Melting Of Waste (AREA)
- Treating Waste Gases (AREA)
- Treatment Of Sludge (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
Description
【０００１】[0001]
【産業上利用分野】この発明は、石炭や石油コ−クスを
燃焼するボイラ−で使用される燃料兼用脱硫剤およびそ
の製造方法に関する。更にいえば、都市下水などの汚泥
を用いた燃料兼用脱硫剤に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a desulfurizing agent which also serves as a fuel used in a boiler for burning coal or petroleum coke and a method for producing the same. Furthermore, it relates to a desulfurizing agent that also serves as a fuel and uses sludge such as city sewage.
【０００２】[0002]
【従来の技術】石炭や石油コ−クスを燃焼するボイラ−
では、従来から、石灰石やドロマイトを原料の石炭やコ
−クスと混合して、或いはこれらの原料とは別途に燃焼
炉に投入し、燃焼で発生する硫黄酸化物を、石灰石やド
ロマイトが熱分解して生成する生石灰や仮焼ドロマイト
と反応させ、石こうや硫酸マグネシウムとして回収する
ことが行われている。燃料として低硫黄石炭の枯渇や、
加圧流動床石炭ボイラ−によるガスタ−ビン発電が普及
すると、こうした炉内脱硫の方式はますます重要になる
と考えられる。Boilers burning coal and petroleum coke
In the past, limestone or dolomite was conventionally mixed with raw material coal or coke, or charged separately from these raw materials into a combustion furnace, and sulfur oxides generated by combustion were thermally decomposed by limestone or dolomite. It is made to react with the quicklime and calcined dolomite that are produced by the above process, and recovered as gypsum and magnesium sulfate. Depletion of low-sulfur coal as fuel,
When gas turbine power generation by a pressurized fluidized bed coal boiler spreads, it is considered that such a method of desulfurization in a furnace becomes more and more important.
【０００３】しかしながら、従来の炉内脱硫方式では、
石灰石やドロマイトと硫黄酸化物の反応率は低く、脱硫
率８０％以上を得るためには、Ｃａ／Ｓモル比を石灰石
の場合で約２以上、ドロマイトの場合で約１．５以上と
しなければならず、石灰石やドロマイトは必ずしも有効
に使用されていなかった。However, in the conventional in-furnace desulfurization system,
The reaction rate of limestone or dolomite with sulfur oxides is low, and in order to obtain a desulfurization rate of 80% or more, the Ca / S molar ratio must be about 2 or more for limestone and about 1.5 or more for dolomite. Moreover, limestone and dolomite were not always effectively used.
【０００４】一方、汚泥は、いうまでもなく今日種々の
問題を発生させている。下水汚泥は、機械的に脱水され
た後、大規模な処理場では焼却されているが、焼却時の
熱回収は必ずしも十分ではない。汚泥の焼却施設の建設
は、種々の理由から用地の確保などで困難な問題に直面
している。また、小規模の処理施設では汚泥の乾燥設
備、焼却炉の運転はエネルギ−的に不利で、ほとんどの
場合は埋め立てが行われているが、用地確保とともに環
境問題もあって、これは急激に制限される傾向にある。
さらに、汚泥の有効利用として、汚泥に石灰類を添加
して乾燥し肥料やセメント原料とすることが既に行われ
ている。しかしながら、肥料としての使用量には限界が
あり、大量に発生する汚泥の処理を行うには不十分であ
り、またセメント原料としての利用でもこれで全てを処
理することは出来ず、多方面における汚泥の大量消費の
技術開発が望まれていた。On the other hand, it goes without saying that sludge causes various problems today. Although sewage sludge is mechanically dehydrated and then incinerated in large-scale treatment plants, heat recovery during incineration is not always sufficient. Construction of a sludge incineration facility faces difficult problems such as securing land for various reasons. Also, in small-scale treatment facilities, the operation of sludge drying equipment and incinerators is an energy disadvantage, and most of the time landfills are done. Tends to be limited.
Furthermore, as an effective use of sludge, it has already been performed to add limes to sludge and dry it to use it as a fertilizer or cement raw material. However, there is a limit to the amount of fertilizer used, and it is not sufficient to treat a large amount of sludge. Moreover, even if it is used as a cement raw material, it cannot be fully treated. There has been a demand for technological development for mass consumption of sludge.
【０００５】[0005]
【発明が解決しようとする課題】この発明は、汚泥の有
効な大量処理を目的として、汚泥を生石灰または仮焼ド
ロマイトを用いて乾燥し、これを石炭や石油を燃焼する
ボイラ−の燃料兼脱硫剤として使用しようとするもので
ある。DISCLOSURE OF THE INVENTION The present invention aims to effectively treat a large amount of sludge, and the sludge is dried using quick lime or calcined dolomite, which is used as a fuel and desulfurizer for a boiler that burns coal or petroleum. It is intended to be used as an agent.
【０００６】[0006]
【課題を解決するための手段】この発明は、生石灰また
は仮焼ドロマイトと汚泥ケ−キの水分との反応で生成さ
れた消石灰または苦土消石灰と、この水和反応で発生す
る熱で乾燥された汚泥とからなることを特徴とする燃料
兼用脱硫剤（請求項１）、汚泥対消石灰の比が、１：１
〜１：８である請求項１記載の燃料兼用脱硫剤（請求項
２）および汚泥ケ−キに生石灰または仮焼ドロマイトを
均一に混合し、そこで発生する熱で汚泥ケ−キを乾燥さ
せることを特徴とする燃料兼用脱硫剤の製造方法（請求
項３）である。以下に、これらの発明をさらに説明す
る。The present invention relates to slaked lime or magnesia slaked lime produced by the reaction between quick lime or calcined dolomite and water in a sludge cake, and dried by the heat generated in this hydration reaction. Desulfurizing agent that also serves as a fuel (claim 1), characterized in that the ratio of sludge to slaked lime is 1: 1.
The desulfurizing agent also serving as a fuel according to claim 1 (claim 2) and the sludge cake are uniformly mixed with quicklime or calcined dolomite, and the sludge cake is dried by the heat generated therein. A method for producing a desulfurizing agent which also serves as a fuel (claim 3). Hereinafter, these inventions will be further described.
【０００７】請求項１の発明は、生石灰または仮焼ドロ
マイトと汚泥ケ−キの水分との反応で生成された消石灰
または苦土消石灰と、この水和反応で発生する熱で乾燥
された汚泥とからなることを特徴とする燃料兼用脱硫剤
である。According to the first aspect of the present invention, slaked lime or magnesia slaked lime produced by the reaction between quick lime or calcined dolomite and water in the sludge cake, and sludge dried by heat generated by this hydration reaction. It is a desulfurizing agent that also serves as a fuel.
【０００８】ここで用いる汚泥は、都市下水の処理で発
生する下水汚泥のほか、各種産業廃水の処理で発生する
汚泥が含まれる。この汚泥は脱水し水分を８０％とした
ケ−キとし、これに生石灰または仮焼ドロマイトを混合
する。生石灰または仮焼ドロマイトは、汚泥中の水分と
反応し消石灰または苦土消石灰となり、同時にこの水和
反応の熱で汚泥は乾燥され、ここに燃料兼用脱硫剤を得
ることが出来る。The sludge used here includes sewage sludge generated in the treatment of city sewage, and sludge generated in the treatment of various industrial wastewaters. This sludge is dehydrated into a cake having a water content of 80%, and quicklime or calcined dolomite is mixed with the cake. Quick lime or calcined dolomite reacts with the water in sludge to become slaked lime or magnesia slaked lime, and at the same time, the sludge is dried by the heat of this hydration reaction, and a desulfurizing agent that also serves as a fuel can be obtained there.
【０００９】本発明で用いられる汚泥は、後に燃料とし
て使用されるところから、発熱量が３０００cal ／kg以
上（乾燥固形分）、出来れば４０００Kcal／kg以上であ
ることが好適である。また、生石灰、仮焼ドロマイト
は、粒径７０mm以下、好ましくは３０mm以下に粉砕して
使用する。なお、汚泥中の水分と反応して消石灰を生成
するものであれば、生石灰、仮焼ドロマイト以外の高炉
水砕、高炉スラグを用いることも可能である。The sludge used in the present invention preferably has a calorific value of 3000 cal / kg or more (dry solid content), and preferably 4000 Kcal / kg or more, since it is used as a fuel later. In addition, quicklime and calcined dolomite are crushed to a particle size of 70 mm or less, preferably 30 mm or less before use. In addition, quick lime and granulated blast furnace or blast furnace slag other than calcined lime and calcined dolomite can be used as long as they react with moisture in sludge to produce slaked lime.
【００１０】本発明において、汚泥と生石灰または仮焼
ドロマイトの混合比は特に限定されないが、汚泥ケ−キ
対生石灰または仮焼ドロマイトは、重量比で１：１．５
〜１：０．５が好ましく、さらに好ましくは１：１．３
〜１：０．７の範囲である。In the present invention, the mixing ratio of sludge to quick lime or calcined dolomite is not particularly limited, but sludge cake to quick lime or calcined dolomite are in a weight ratio of 1: 1.5.
˜1: 0.5 is preferable, and more preferably 1: 1.3.
˜1: 0.7.
【００１１】上記の燃料兼用脱硫剤の粉体は、石炭焚き
ボイラ−または石油コ−クスのボイラ−で、従来使用さ
れている石灰石やドロマイトに替えて、燃料と混合して
或いは燃料とは別途に炉内に投入するだけでよい。The above-mentioned powder of the desulfurizing agent which also serves as a fuel is a coal-fired boiler or a boiler of petroleum coke, which is used in place of limestone or dolomite which is conventionally used, mixed with the fuel or separately from the fuel. Just put it in the furnace.
【００１２】本発明の燃料兼用脱硫剤の粉体を用いると
きは、本来の燃料を節約することがが出来るとともに、
これに含まれているカルシウムやマグネシウムは水酸化
物として存在するので、石灰石やドロマイトのように炭
酸化物として存在するものよりも低い温度で、しかも少
ない吸熱量で酸化物となり、硫黄酸化物と容易に反応し
て石こうまたは硫酸マグネシウムとなる。８０％の脱硫
率を得ようとするとＣａ／Ｓは１．２程度で十分である
ので、本発明によれば、石灰石やドロマイトは従来より
は効率よく使用されていることが分かる。この燃料兼用
脱硫剤を用いれば、硫黄を含む低価格の燃料に切替えて
使用することも可能である。When the powder of the desulfurizing agent also serving as the fuel of the present invention is used, the original fuel can be saved and
Since the calcium and magnesium contained in this exist as hydroxides, they become oxides at a temperature lower than those existing as carbonates, such as limestone and dolomite, and with a lower endothermic amount, easily forming sulfur oxides. To gypsum or magnesium sulfate. Since Ca / S of about 1.2 is sufficient to obtain a desulfurization rate of 80%, it can be seen from the present invention that limestone and dolomite are used more efficiently than before. By using this desulfurizing agent that also serves as fuel, it is possible to switch to a low-cost fuel containing sulfur for use.
【００１３】請求項３の発明は、汚泥ケ−キに生石灰ま
たは仮焼ドロマイトを均一に混合し、そこで発生する熱
で汚泥ケ−キを乾燥させることを特徴とする燃料兼用脱
硫剤の製造方法である。汚泥ケ−キ、生石灰または仮焼
ドロマイトについては、既に説明したところと同様であ
る。汚泥ケ−キと生石灰または仮焼ドロマイトの割合
は、重量比で１：１．５〜１：０．５である。汚泥ケ−
キと生石灰または仮焼ドロマイトを混合する方法は、例
えばホッパ−から汚泥ケ−キと生石灰または仮焼ドロマ
イトを別々に混合機に導入し、ここで生石灰または仮焼
ドロマイトを汚泥ケ−キと均一に混合する。次いで、こ
れを熟成兼搬送コンベアに供給する。汚泥は搬送されな
がら、生石灰または仮焼ドロマイトが汚泥中の水分と反
応する熱で乾燥され、その端部から乾燥した汚泥固形物
として取り出される。こうした処理で、汚泥は乾燥、粉
化され、汚泥と消石灰または苦土消石灰が１：１〜１：
８の範囲で混合された燃料兼用脱硫剤が得られる。According to a third aspect of the present invention, a method for producing a desulfurizing agent also serving as a fuel, characterized by uniformly mixing quicklime or calcined dolomite with a sludge cake and drying the sludge cake with heat generated there. Is. The sludge cake, quicklime, and calcined dolomite are the same as described above. The weight ratio of sludge cake to quicklime or calcined dolomite is 1: 1.5 to 1: 0.5. Sludge case
The method for mixing ki and quick lime or calcined dolomite is, for example, introducing sludge cake and quick lime or calcined dolomite separately from a hopper into a mixer, where quick lime or calcined dolomite is uniformly mixed with sludge cake. To mix. Then, this is supplied to the maturing / conveying conveyor. While the sludge is being transported, quicklime or calcined dolomite is dried by the heat that reacts with the moisture in the sludge, and is taken out as dried sludge solid matter from its end. By such treatment, sludge is dried and pulverized, and sludge and slaked lime or magnesia slaked lime are 1: 1 to 1:
A desulfurizing agent also serving as a fuel mixed in the range of 8 can be obtained.
【００１４】[0014]
【作用】この発明は、汚泥ケ−キに生石灰または仮焼ド
ロマイトを混合し、生石灰または仮焼ドロマイトと汚泥
中の水分を反応させ、その反応熱で汚泥を乾燥させると
ともに、ここで生成した消石灰または苦土消石灰を脱硫
剤として使用するとともに、乾燥した汚泥を燃料として
使用しようとするものである。According to the present invention, the sludge cake is mixed with quicklime or calcined dolomite, the quicklime or calcined dolomite is allowed to react with the water in the sludge, and the sludge is dried by the heat of the reaction, and the slaked lime produced here is produced. Alternatively, it is intended to use magnesium slaked lime as a desulfurizing agent and dry sludge as a fuel.
【００１５】[0015]
【実施例】都市下水を活性汚泥法で処理した汚泥を、高
分子凝集剤を脱水助剤として遠心式脱水機で脱水し汚泥
ケ−キを得た。このケ−キは、水分８０％、発熱量４０
００kcal／kg、炭素分４１．３％、灰分２３．５％であ
った。この汚泥ケ−キに純度９３％の生石灰を同量添加
し、２０分間パグミルで撹拌、混合して流動性のよい粉
体を得た。このものの水分は約１２％、Ｃａ（ＯＨ）2
は約７２％であった。Example Sludge obtained by treating municipal sewage by the activated sludge method was dehydrated by a centrifugal dehydrator using a polymer flocculant as a dehydration aid to obtain a sludge cake. This cake has a water content of 80% and a calorific value of 40.
The amount was 00 kcal / kg, the carbon content was 41.3%, and the ash content was 23.5%. The same amount of quicklime with a purity of 93% was added to this sludge cake, and the mixture was stirred and mixed in a pug mill for 20 minutes to obtain a powder having good fluidity. The water content of this product is about 12%, Ca (OH) 2
Was about 72%.
【００１６】この粉体を、発熱量８４８０kcal／kgの石
油コ−クスを１０T ／hrで燃焼しているボイラ−に使用
した。上記石油コ−クスの硫黄含有率は４．６％、固定
炭素は８６％、灰分は０．８％でった。This powder was used in a boiler burning petroleum coke having a heating value of 8480 kcal / kg at 10 T / hr. The petroleum coke had a sulfur content of 4.6%, a fixed carbon content of 86%, and an ash content of 0.8%.
【００１７】上記ボイラ−では、従来、脱硫率８０％を
得るために、純度９６％の石灰石を３T ／hrで投入して
いた。これによって、生成石こう（ＣａＳＯ4 ）は１５
６４kg／hr、残存ＣａＯは９６６kg／hr、これらを含む
灰分は全体で２７３０kg／hr、発生ＣＯ2 は１６，７０
００m 3 ／hrであった。In the above-mentioned boiler, limestone having a purity of 96% was conventionally charged at 3 T / hr in order to obtain a desulfurization rate of 80%. As a result, the produced gypsum (CaSO 4 ) is 15
64 kg / hr, residual CaO is 966 kg / hr, ash content including them is 2730 kg / hr in total, and generated CO 2 is 16,70.
00 m 3 / Hr.
【００１８】しかし、上記の本願発明の燃料兼用脱硫剤
の粉体を使用したものでは、同じ発熱量を得るのに石油
コ−クスは９８１６kg／hrで足り、１．８％の燃料の節
約が出来た。また、同じように８０％の脱硫率を得るた
めには、粉体の投入量は１７４４kg／hrであった。この
ために使用された生石灰の量は１０００kg／hr（生石灰
１０００kg製造に石灰石１８００kg使用）で、従来より
も大幅に減少させることが出来るようになった。さらに
ボイラ−から排出される灰分は１９８０kg／hr、発生Ｃ
Ｏ2 は１５，９００Nm3 であった。However, in the case of using the powder of the desulfurizing agent for both fuel and fuel of the present invention, 9816 kg / hr of petroleum coke is sufficient to obtain the same calorific value, and a fuel saving of 1.8% is achieved. done. Similarly, in order to obtain a desulfurization rate of 80%, the amount of powder added was 1744 kg / hr. The amount of quick lime used for this purpose is 1000 kg / hr (1800 kg of limestone is used for the production of 1000 kg of quick lime), and it has become possible to greatly reduce the amount as compared with the conventional one. Furthermore, the ash content discharged from the boiler is 1980 kg / hr, and the generated C
O 2 is 15,900 Nm 3 Met.
【００１９】このように、本発明によれば、同一発熱量
を得るのに石油コ−クスを約１．８％節約でき、灰分が
約２．７％、発生ＣＯ2 の量を約４．７％減少させるこ
とが出来る。[0019] Thus, according to the present invention, oil to obtain the same heating value co - box can savings of about 1.8%, ash content of about 2.7%, about the amount of generated CO 2 4. It can be reduced by 7%.
【００２０】さらに、この発明によれば燃焼温度を下げ
ることが出来るので、燃焼時の窒素酸化物の濃度も下げ
ることが出来る。これは石灰石に比べ消石灰の分解温度
が低く、また乾燥汚泥に含まれている水分によりカルシ
ウムが硫化される温度が低下されるためである。Further, according to the present invention, since the combustion temperature can be lowered, the concentration of nitrogen oxides during combustion can also be lowered. This is because the decomposition temperature of slaked lime is lower than that of limestone, and the temperature at which calcium is sulfided by water contained in the dried sludge is lowered.
【００２１】[0021]
【発明の効果】以上の通り、本願発明によれば、従来か
らその処理に困っていた汚泥が、燃料兼用の脱硫剤とし
て逆に利用出来るようになった。しかも、この発明の脱
硫剤を用いれれば、燃料の節約、使用する石灰石の減少
の外、灰分、発生するＣＯ2 を減少することが出来、産
業上すこぶる有用なものである。As described above, according to the present invention, sludge, which has conventionally been troubled by its treatment, can be used as a desulfurizing agent which also serves as a fuel. Moreover, if the desulfurizing agent of the present invention is used, in addition to saving fuel and reducing the amount of limestone used, ash and CO 2 generated can be reduced, which is extremely useful industrially.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ２３Ｇ 7/00 １０２ Ｂ 7815−3Ｋ (72)発明者 安田 浩 東京都江東区南砂２丁目７番５号 小野田 エンジニアリング株式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification number Internal reference number in the agency FI technical display location F23G 7/00 102 B 7815-3K (72) Inventor Hiroshi Yasuda 2-7 Minamisuna, Koto-ku, Tokyo No. 5 Onoda Engineering Co., Ltd.
Claims (3)
キの水分との反応で生成された消石灰または苦土消石灰
と、この水和反応で発生する熱で乾燥された汚泥とから
なることを特徴とする燃料兼用脱硫剤。1. Quicklime or calcined dolomite and sludge case
A desulfurizing agent that also serves as a fuel, comprising slaked lime or magnesia slaked lime produced by the reaction with the water content of ki and sludge dried by the heat generated by this hydration reaction.
灰の比が、１：１〜１：８である請求項１記載の燃料兼
用脱硫剤。2. A desulfurizing agent which also serves as a fuel according to claim 1, wherein the ratio of dried sludge to slaked lime or slaked lime slaked lime is 1: 1 to 1: 8.
トを均一に混合し、そこで発生する熱で汚泥ケ−キを乾
燥させることを特徴とする燃料兼用脱硫剤の製造方法。3. A method for producing a desulfurizing agent also serving as a fuel, which comprises uniformly mixing quicklime or calcined dolomite with a sludge cake and drying the sludge cake with heat generated therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4205502A JPH0650505A (en) | 1992-07-31 | 1992-07-31 | Desulfurizing agent used both for fuel and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4205502A JPH0650505A (en) | 1992-07-31 | 1992-07-31 | Desulfurizing agent used both for fuel and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0650505A true JPH0650505A (en) | 1994-02-22 |
Family
ID=16507925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4205502A Pending JPH0650505A (en) | 1992-07-31 | 1992-07-31 | Desulfurizing agent used both for fuel and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0650505A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4832442A (en) * | 1987-07-17 | 1989-05-23 | United Ropeworks (U.S.A.) Inc. | Method and apparatus for aerial installation of fiber optic cables |
| CN1123374C (en) * | 1999-03-29 | 2003-10-08 | 青岛海洋大学 | Method for removing sulfur oxides from flue-gas by utilizing waste sludge of soda plant |
| JP2012055808A (en) * | 2010-09-07 | 2012-03-22 | Daihachi Kameoka | Method of using surplus sludge |
| JP2014140812A (en) * | 2013-01-23 | 2014-08-07 | Yoshizawa Lime Industry | Exhaust gas treatment agent and method of producing the same |
-
1992
- 1992-07-31 JP JP4205502A patent/JPH0650505A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4832442A (en) * | 1987-07-17 | 1989-05-23 | United Ropeworks (U.S.A.) Inc. | Method and apparatus for aerial installation of fiber optic cables |
| CN1123374C (en) * | 1999-03-29 | 2003-10-08 | 青岛海洋大学 | Method for removing sulfur oxides from flue-gas by utilizing waste sludge of soda plant |
| JP2012055808A (en) * | 2010-09-07 | 2012-03-22 | Daihachi Kameoka | Method of using surplus sludge |
| JP2014140812A (en) * | 2013-01-23 | 2014-08-07 | Yoshizawa Lime Industry | Exhaust gas treatment agent and method of producing the same |
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