JP2010042970A - Slaked lime and method for producing the same - Google Patents
Slaked lime and method for producing the same Download PDFInfo
- Publication number
- JP2010042970A JP2010042970A JP2008209855A JP2008209855A JP2010042970A JP 2010042970 A JP2010042970 A JP 2010042970A JP 2008209855 A JP2008209855 A JP 2008209855A JP 2008209855 A JP2008209855 A JP 2008209855A JP 2010042970 A JP2010042970 A JP 2010042970A
- Authority
- JP
- Japan
- Prior art keywords
- slaked lime
- mass
- quicklime
- digestion
- diethylene glycol
- 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.)
- Granted
Links
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
本発明は、特に酸性ガスの除去処理剤として有利に用いることができる高比表面積の消石灰、及びその製造方法に関するものである。 The present invention relates to slaked lime having a high specific surface area that can be advantageously used as an acid gas removal treatment agent, and a method for producing the same.
ゴミ焼却場などの排煙中の酸性ガスの除去処理方法として、排煙に消石灰を接触させて、排煙中の酸性ガスと消石灰とを反応させ、その反応生成物を含有する飛灰をバグフィルターなどの粉塵回収装置で回収する方法が知られている。回収した飛灰は、通常、水洗した後、埋め立て処理されている。 As a method of removing acid gas in flue gas such as garbage incineration plants, contact slaked lime with flue gas, react the acid gas in the flue gas with slaked lime, and bug the fly ash containing the reaction product A method of collecting with a dust collecting device such as a filter is known. The recovered fly ash is usually landfilled after being washed with water.
消石灰の製造方法としては、生石灰を、生石灰の消化に必要な理論量よりも過剰量の水に接触させることにより消化させて、消化を行ない、並行して消化熱により乾燥するか、あるいは消化終了の後に乾燥する方法が知られている。酸性ガスの除去処理剤として用いる消石灰は、酸性ガスとの接触面積が大きいこと、すなわちＢＥＴ比表面積が大きいことが望ましい。このため、生石灰の消化により生成する消石灰のＢＥＴ比表面積を大きくするための方法がこれまでに検討され、その結果、生石灰の消化に用いる水（消化水）にジエチレングリコールを添加して、ジエチレングリコールの存在下にて生石灰を消化させる方法が開発されている。 As a method of producing slaked lime, quick lime is digested by bringing it into contact with an excessive amount of water than the theoretical amount required for digestion of quick lime, digested, and dried in parallel with digestion heat, or the digestion is completed. A method of drying after the above is known. The slaked lime used as the acid gas removal treatment agent preferably has a large contact area with the acid gas, that is, a large BET specific surface area. For this reason, methods for increasing the BET specific surface area of slaked lime produced by digestion of quicklime have been studied so far, and as a result, diethylene glycol was added to the water used for digestion of quicklime (digested water), and the presence of diethylene glycol. A method has been developed to digest quicklime underneath.
特許文献１には、生石灰を、ジエチレングリコールを生石灰の消化によって生成する消石灰の量に対して０．１〜２０質量％に相当する量（生石灰に対する量に換算して、約０．１３〜２６質量％）にて添加した消化水を用いて消化させる消石灰の製造方法が記載されている。この特許文献１の実施例では、消化水にジエチレングリコールを、生石灰の消化によって生成する消石灰の量に対して３質量％（生石灰に対する量に換算して、約４質量％）添加した場合で、比表面積が５１．６ｍ2／ｇの消石灰が得られている。 In Patent Document 1, quick lime is an amount equivalent to 0.1 to 20% by mass with respect to the amount of slaked lime produced by digesting diethylene glycol by quick lime (about 0.13 to 26 mass in terms of the amount of quick lime). %)), A method for producing slaked lime that is digested using digested water is described. In the example of Patent Document 1, diethylene glycol is added to digestion water in an amount of 3% by mass (about 4% by mass in terms of quick lime) with respect to the amount of slaked lime generated by digestion of quick lime. Slaked lime having a surface area of 51.6 m 2 / g is obtained.
特許文献２には、生石灰を、ジエチレングリコールを生石灰の量に対して０．１〜１０質量％に相当する量にて添加した消化水を用いて消化させる消石灰の製造方法が記載されている。この特許文献２の実施例では、消化水にジエチレングリコールを、生石灰の量に対して０．６５質量％添加した場合で、比表面積が３５．５ｍ2／ｇの消石灰が得られている。
特許文献１及び特許文献２の記載を見ると、消化水にジエチレングリコールを添加する消石灰の製造方法では、消化水へのジエチレングリコールの添加量が多い方が、生成する消石灰のＢＥＴ比表面積が大きくなる傾向がある。しかし、消化水に添加したジエチレングリコールは、生成する消石灰にその全部もしくはその大部分が残留するため、消化水へのジエチレングリコールの添加量を多くすると、生成する消石灰のジエチレングリコールの含有量が多くなるという問題がある。特に、酸性ガスの除去処理剤に用いる消石灰では、消石灰中のジエチレングリコールが酸性ガスと消石灰との反応生成物を含有する飛灰に多量に混入し、飛灰の水洗の際に洗浄水にジエチレングリコールが溶出すると、その洗浄水のＣＯＤ（化学的酸素要求量）が高くなる。従って、生石灰の消化に際してのジエチレングリコールの使用量を多くするのはあまり好ましくはない。 Looking at the description of Patent Document 1 and Patent Document 2, in the method for producing slaked lime in which diethylene glycol is added to digested water, the amount of diethylene glycol added to digested water tends to increase the BET specific surface area of the produced slaked lime. There is. However, because all or most of the diethylene glycol added to the digested water remains in the slaked lime produced, increasing the amount of diethylene glycol added to the digested water increases the content of diethylene glycol in the produced slaked lime. There is. In particular, in slaked lime used as an acid gas removal treatment agent, a large amount of diethylene glycol in the slaked lime is mixed in the fly ash containing the reaction product of acid gas and slaked lime, and diethylene glycol is contained in the wash water when the fly ash is washed with water. When it is eluted, the COD (chemical oxygen demand) of the washing water increases. Therefore, it is not very preferable to increase the amount of diethylene glycol used when digesting quicklime.
従って、本発明の目的は、生石灰の消化による消石灰の製造に際して、比較的少量のジエチレングリコールの使用で、３５ｍ2／ｇ以上の高ＢＥＴ比表面積を有する消石灰を製造する技術を提供することにある。 Accordingly, an object of the present invention is to provide a technique for producing slaked lime having a high BET specific surface area of 35 m 2 / g or more by using a relatively small amount of diethylene glycol when producing slaked lime by digestion of quick lime.
本発明者は、消化水に珪藻土を、生石灰１００質量部に対して１．０〜５．０質量部の範囲の量で添加することによって、ジエチレングリコールの添加量を生石灰１００質量部に対して０．１〜０．５質量部程度に抑えても、ＢＥＴ比表面積が３５ｍ2／ｇ以上の消石灰を得ることが可能となることを見出して本発明を完成させた。 The inventor adds diatomaceous earth to digested water in an amount in the range of 1.0 to 5.0 parts by mass with respect to 100 parts by mass of quicklime, thereby reducing the amount of diethylene glycol added to 100 parts by mass of quicklime. The present invention was completed by finding that it is possible to obtain slaked lime having a BET specific surface area of 35 m 2 / g or more even if the amount is suppressed to about 1 to 0.5 parts by mass.
従って、本発明は、生石灰を、該生石灰１００質量部に対してジエチレングリコールを０．１０〜０．５０質量部の範囲の量そして珪藻土を１．０〜５．０質量部の範囲の量にて含む、該生石灰の消化に必要な理論量の１．５〜５．０質量倍の水に接触させることにより、消化を行ない、並行して消化熱により乾燥するか、あるいは消化終了の後に乾燥することを特徴とするＢＥＴ比表面積が３５ｍ2／ｇ以上の消石灰の製造方法にある。 Accordingly, the present invention provides quick lime in an amount in the range of 0.10 to 0.50 parts by weight of diethylene glycol and 100 to 5.0 parts by weight of diatomaceous earth with respect to 100 parts by weight of the quick lime. Including, by contacting with 1.5 to 5.0 mass times the theoretical amount necessary for digestion of the quicklime, digestion is performed and dried in parallel with the heat of digestion or dried after completion of digestion It exists in the manufacturing method of the slaked lime whose BET specific surface area characterized by this being 35 m < 2 > / g or more.
本発明の消石灰の製造方法の好ましい態様は、次の通りである。
（１）乾燥を、消化終了の後に行なう。
（２）消化に用いる水中に含まれるジエチレングリコールの量が、生石灰１００質量部に対して０．１０〜０．３０質量部の範囲にある。
（３）消化に用いる水中に含まれる珪藻土の量が、生石灰１００質量部に対して１．０〜４．０質量部の範囲にある。
（４）消石灰のＢＥＴ比表面積が３５〜５０ｍ2／ｇの範囲にある。
The preferable aspect of the manufacturing method of the slaked lime of this invention is as follows.
(1) Drying is performed after completion of digestion.
(2) The amount of diethylene glycol contained in the water used for digestion is in the range of 0.10 to 0.30 parts by mass with respect to 100 parts by mass of quicklime.
(3) The amount of diatomaceous earth contained in the water used for digestion is in the range of 1.0 to 4.0 parts by mass with respect to 100 parts by mass of quicklime.
(4) The slaked lime has a BET specific surface area in the range of 35 to 50 m 2 / g.
本発明はまた、ジエチレングリコールを０．０７６〜０．３８質量％の量で含有し、かつ珪藻土を０．７６〜３．８質量％の量で含有するＢＥＴ比表面積が３５ｍ2／ｇ以上の消石灰にもある。 The present invention also includes slaked lime containing diethylene glycol in an amount of 0.076 to 0.38 mass% and diatomaceous earth in an amount of 0.76 to 3.8 mass% and having a BET specific surface area of 35 m 2 / g or more. There is also.
本発明の消石灰の好ましい態様は、次の通りである。
（１）ジエチレングリコールの含有量が０．０７６〜０．２３質量％の範囲にある。
（２）珪藻土の含有量が０．７６〜３．０質量％の範囲にある。
（３）ＢＥＴ比表面積が３５〜５０ｍ2／ｇの範囲にある。
The preferable aspect of the slaked lime of this invention is as follows.
(1) The content of diethylene glycol is in the range of 0.076 to 0.23 mass%.
(2) The content of diatomaceous earth is in the range of 0.76 to 3.0% by mass.
(3) The BET specific surface area is in the range of 35 to 50 m 2 / g.
本発明の消石灰の製造方法を用いることによって、比較的少量のジエチレングリコールの使用で、３５ｍ2／ｇ以上の高ＢＥＴ比表面積を有する消石灰を工業的に有利に製造することができる。本発明の消石灰は、水との接触によって溶出するジエチレングリコールの含有量が少ないため、酸性ガスの除去処理剤として有利に用いることができる。なお、珪藻土は無機物で水に溶出しないため、ＣＯＤに影響はしない。 By using the method for producing slaked lime of the present invention, slaked lime having a high BET specific surface area of 35 m 2 / g or more can be industrially advantageously produced by using a relatively small amount of diethylene glycol. Since the slaked lime of the present invention has a small content of diethylene glycol eluted by contact with water, it can be advantageously used as an acid gas removal treatment agent. In addition, since diatomaceous earth is an inorganic substance and does not elute into water, it does not affect COD.
本発明の消石灰の製造方法は、生石灰を、生石灰の消化に必要な理論量よりも過剰量の消化水に接触させることにより消化を行なう点では、従来の消石灰の製造方法と同様である。本発明は、生石灰の消化に用いる消化水が、少量のジエチレングリコールと珪藻土とを含む点に主な特徴点がある。 The method for producing slaked lime according to the present invention is the same as the conventional method for producing slaked lime in that digestion is performed by bringing quick lime into contact with an excessive amount of digested water than the theoretical amount necessary for digestion of quick lime. The main feature of the present invention is that digested water used for quicklime digestion contains a small amount of diethylene glycol and diatomaceous earth.
本発明において、原料として用いる生石灰は、通常の消石灰の製造のために用いられる生石灰と基本的に同じである。すなわち、通常の焼成生石灰の塊状物を適宜粉砕して、粉末状もしくは粒状としたのち、これを原料生石灰として用いることができる。 In the present invention, the quicklime used as a raw material is basically the same as the quicklime used for the production of ordinary slaked lime. That is, a lump of ordinary calcined quicklime is appropriately pulverized to form powder or granules, and this can be used as raw quicklime.
本発明で用いる消化水は、ジエチレングリコールを生石灰１００質量部に対して０．１０〜０．５０質量部の範囲の量、好ましくは０．１０〜０．３０質量部の範囲の量で含み、さらに珪藻土を生石灰１００質量部に対して１．０〜５．０質量部の範囲の量、好ましくは１．０〜４．０質量部の範囲の量にて含む。ジエチレングリコール及び珪藻土の量が多い方が得られる消石灰のＢＥＴ比表面積が大きくなる。消化水は、生石灰と接触する前に、ジエチレングリコールと珪藻土が添加されていることが好ましい。 The digestion water used in the present invention contains diethylene glycol in an amount in the range of 0.10 to 0.50 parts by mass, preferably in the range of 0.10 to 0.30 parts by mass with respect to 100 parts by mass of quicklime, Diatomaceous earth is contained in an amount in the range of 1.0 to 5.0 parts by mass, preferably in an amount in the range of 1.0 to 4.0 parts by mass with respect to 100 parts by mass of quicklime. The BET specific surface area of the slaked lime obtained with a larger amount of diethylene glycol and diatomaceous earth increases. Digested water is preferably added with diethylene glycol and diatomaceous earth before contacting with quicklime.
消化水に添加する珪藻土は、珪藻の殻からなる堆積岩の粉砕物であり、その主成分は多孔質の非晶質シリカである。珪藻土のシリカ含有量は、７０〜９０質量％の範囲にあることが好ましい。珪藻土の平均粒子径（レーザー回折法による測定値）は、１〜５０μｍの範囲にあることが好ましい。 Diatomaceous earth added to digestion water is a pulverized sedimentary rock made of diatom shell, and its main component is porous amorphous silica. The silica content of diatomaceous earth is preferably in the range of 70 to 90% by mass. It is preferable that the average particle diameter (measured value by a laser diffraction method) of diatomaceous earth exists in the range of 1-50 micrometers.
生石灰の消化に用いる消化水の量は、生石灰の量に対して、生石灰の消化に必要な理論量の１．５〜５．０質量倍の範囲の量、好ましくは２．０〜５．０質量倍の範囲の量である。 The amount of digested water used for digestion of quicklime is an amount in the range of 1.5 to 5.0 times the theoretical amount required for quicklime digestion, preferably 2.0 to 5.0. The amount is in the range of mass times.
生石灰を消化水に接触させる消化工程は、通常は、混合機を用いて、撹拌下にて実施する。撹拌は比較的高速で実施することが好ましい。 The digestion process in which quicklime is brought into contact with digested water is usually carried out with stirring using a mixer. Stirring is preferably performed at a relatively high speed.
消化工程で生石灰に接触させる過剰量の消化水は、生石灰の消化と並行して消化熱により乾燥除去してもよいし、消化終了の後に乾燥して除去してもよい。乾燥後の消石灰は、適宜粉砕することにより粉末状もしくは粒状とすることができる。消化終了後に乾燥する方が、得られる消石灰の細孔容積が大きくなる傾向にあるので好ましい。 The excessive amount of digested water that is brought into contact with quicklime in the digestion step may be removed by drying with heat of digestion in parallel with the digestion of quicklime, or may be removed by drying after completion of digestion. The slaked lime after drying can be made into a powder form or a granular form by appropriately pulverizing. Drying after completion of digestion is preferred because the pore volume of the obtained slaked lime tends to increase.
乾燥を消化終了後に行なう場合、消化終了時の含水消石灰の含水率は、１０〜３０質量％の範囲にあることが好ましく、１０〜２５質量％の範囲にあることがより好ましく、１５〜２０質量％の範囲にあることがさらに好ましい。 When drying is performed after completion of digestion, the water content of the hydrous slaked lime at the end of digestion is preferably in the range of 10 to 30% by mass, more preferably in the range of 10 to 25% by mass, and 15 to 20% by mass. More preferably, it is in the range of%.
また、乾燥を消化終了後に行なう場合は、消化工程と乾燥工程との間に、含水消石灰を乾燥させながら、その熟成を行なう熟成工程を介在させてもよい。熟成工程では、消化工程で生成した含水消石灰を、乾燥機能を有する熟成容器内で、水分を徐々に蒸発除去させて実施する。熟成工程は通常、消化工程に用いる混合機に連結して設置した熟成容器内で行なうが、熟成容器を混合機と分離して設置して、消化工程とは独立に熟成を行なうこともできる。 Moreover, when drying is performed after completion of digestion, an aging step for aging the hydrous slaked lime while drying it may be interposed between the digestion step and the drying step. In the aging step, the hydrated slaked lime generated in the digestion step is carried out by gradually evaporating and removing moisture in an aging container having a drying function. The aging step is usually performed in an aging container connected to a mixer used for the digestion step, but the aging can be performed separately from the digestion step by separating the aging container from the mixer.
本発明の製造方法により得られる本発明の消石灰は、ＢＥＴ比表面積が３５ｍ2／ｇ以上（通常は３５〜５０ｍ2／ｇの範囲、特に３８〜５０ｍ2／ｇの範囲）の消石灰である。消化水に添加したジエチレングリコールと珪藻土とは、その全部もしくはその大部分が消石灰に残留している。すなわち、本発明の消石灰は、ジエチレングリコールの含有量が通常は０．０７６〜０．３８質量％の範囲、好ましくは０．０７６〜０．２３質量％の範囲にあり、珪藻土の含有量が通常は０．７６〜３．８質量％の範囲、好ましくは０．７６〜３．０質量％の範囲にある。本発明の消石灰はまた、細孔直径が１〜２００ｎｍの範囲にある細孔の細孔容積が、一般に０．２ｍＬ／ｇ以上、特に０．２〜０．５ｍＬ／ｇの範囲にある。 Slaked lime of the present invention obtained by the production method of the present invention is the slaked lime having a BET specific surface area of 35m 2 / g or more (typically in the range of 35~50m 2 / g, the range of particularly 38~50m 2 / g). All or most of the diethylene glycol and diatomaceous earth added to the digested water remain in the slaked lime. That is, in the slaked lime of the present invention, the content of diethylene glycol is usually in the range of 0.076 to 0.38 mass%, preferably in the range of 0.076 to 0.23 mass%, and the content of diatomaceous earth is usually It exists in the range of 0.76-3.8 mass%, Preferably it is the range of 0.76-3.0 mass%. In the slaked lime of the present invention, the pore volume of pores having a pore diameter in the range of 1 to 200 nm is generally 0.2 mL / g or more, particularly in the range of 0.2 to 0.5 mL / g.
本発明の消石灰は、従来の消化水にジエチレングリコールを添加する方法によって製造された高ＢＥＴ比表面積の消石灰と比べて、ジエチレングリコールの含有量を少量とすることができるため、消石灰に接触した水のＣＯＤが低い値を示す。例えば、本発明の消石灰１００ｇ、蒸留水５００ｍＬ、ＰＡＣ（ポリ塩化アルミニウム）０．２５ｇを、３分間混合して調製した消石灰スラリーを固液分離して得た水溶液は、ＣＯＤMnが１０〜２５０ｍｇＯ／Ｌの範囲、特に１０〜１５０ｍｇＯ／Ｌの範囲の値となる。 Compared with the slaked lime having a high BET specific surface area produced by the conventional method of adding diethylene glycol to the digested water, the slaked lime of the present invention can reduce the content of diethylene glycol, so that the COD of water in contact with the slaked lime Indicates a low value. For example, an aqueous solution obtained by solid-liquid separation of slaked lime slurry prepared by mixing 100 g of slaked lime of the present invention, 500 mL of distilled water and 0.25 g of PAC (polyaluminum chloride) for 3 minutes has a COD Mn of 10 to 250 mgO / The value is in the range of L, particularly in the range of 10 to 150 mg O / L.
［実施例１］
パドル式混合機内に、生石灰粉末を１９００ｋｇ／時間の条件で供給し、同時にジエチレングリコールの濃度が０．２１質量％、珪藻土の濃度が１．０３質量％となるように、ジエチレングリコールと珪藻土（ラヂオライトＳＰＦ、昭和化学工業（株）製、平均粒子径：１６．１μｍ）とを添加した消化水を２０７６ｋｇ／時間の条件で供給し、両者を接触させて生石灰粉末を消化させた（消化水の供給量は生石灰の消化に必要な理論量の約３．３質量倍、生石灰１００質量に対するジエチレングリコールの添加量は０．２３質量部、珪藻土の添加量は１．１３質量部）。
次いで、消化生成物を熟成機に移動して、熟成機内で撹拌しながら熟成させて、含水消石灰を得た。得られた含水消石灰を熟成機から取り出し、伝熱管式流動乾燥機で水分が０．５質量％以下になるまで乾燥した後、ハンマー式微粉砕機にて粉砕して、粉末状消石灰を得た。
[Example 1]
In the paddle type mixer, quick lime powder is supplied at a rate of 1900 kg / hour, and at the same time, the diethylene glycol and diatomaceous earth (Radiolite SPF) are adjusted so that the concentration of diethylene glycol is 0.21 mass% and the concentration of diatomaceous earth is 1.03 mass%. , Showa Kagaku Kogyo Co., Ltd., average particle size: 16.1 μm) was added under the condition of 2076 kg / hour, and both were brought into contact to digest quick lime powder (digested water supply amount) Is about 3.3 times the theoretical amount required for digestion of quicklime, 0.23 parts by weight of diethylene glycol is added to 100 parts by weight of quicklime, and 1.13 parts by weight of diatomaceous earth).
Next, the digested product was moved to an aging machine and aged with stirring in the aging machine to obtain hydrous slaked lime. The obtained hydrous slaked lime was taken out from the ripening machine, dried with a heat transfer tube type fluid dryer until the water content became 0.5% by mass or less, and then pulverized with a hammer type fine pulverizer to obtain powdered slaked lime.
得られた粉末状消石灰のＢＥＴ比表面積、細孔容積及び消石灰接触後の水のＣＯＤMnを表１に示す。ＢＥＴ比表面積及び細孔容積（細孔直径が１〜２００ｎｍの範囲にある細孔の細孔容積）は、自動比表面積／細孔分布測定装置（トライスター３０００、（株）島津製作所製）を用いて測定した。消石灰接触後の水のＣＯＤMnは、以下の方法により測定した。 Table 1 shows the BET specific surface area, pore volume, and COD Mn of water after slaked lime contact of the obtained powdered slaked lime. BET specific surface area and pore volume (pore volume of pores having a pore diameter in the range of 1 to 200 nm) are measured using an automatic specific surface area / pore distribution measuring device (Tristar 3000, manufactured by Shimadzu Corporation). And measured. COD Mn of water after lime contact were measured by the following method.
［消石灰接触後のＣＯＤMnの測定方法］
（１）消石灰１００ｇを、０．１ｇまで正確に秤取りガラス瓶に入れる。
（２）ガラス瓶に蒸留水５００ｍＬとＰＡＣ０．２５ｇとを加えた後、ポリテトラフルオロエチレン製撹拌棒にて３分間撹拌して消石灰スラリーを調製する。
（３）消石灰スラリーを遠心分離機を用いて固液分離し、上澄み液をろ紙（５Ａ）でろ過する。
（４）得られたろ液を検液として、ＣＯＤMnをＪＩＳ−Ｋ−０１０２（１９９８）に準拠した方法により測定する。
[Measurement method of COD Mn after slaked lime contact]
(1) 100 g of slaked lime is accurately weighed to 0.1 g and placed in a glass bottle.
(2) After adding 500 mL of distilled water and 0.25 g of PAC to a glass bottle, the mixture is stirred for 3 minutes with a stirring bar made of polytetrafluoroethylene to prepare a slaked lime slurry.
(3) The slaked lime slurry is subjected to solid-liquid separation using a centrifuge, and the supernatant liquid is filtered with a filter paper (5A).
(4) Using the obtained filtrate as a test solution, COD Mn is measured by a method based on JIS-K-0102 (1998).
［比較例１］
消化水に珪藻土を添加しなかったこと以外は、実施例１と同様にして、粉末状消石灰を製造した。得られた粉末状消石灰のＢＥＴ比表面積、細孔容積及び消石灰接触後の水のＣＯＤMnを表１に示す。
[Comparative Example 1]
Powdered slaked lime was produced in the same manner as in Example 1 except that diatomaceous earth was not added to the digested water. Table 1 shows the BET specific surface area, pore volume, and COD Mn of water after slaked lime contact of the obtained powdered slaked lime.
［比較例２］
消化水にジエチレングリコールを、その濃度が１．２０質量％なるように添加し、珪藻土を添加しなかったこと以外は、実施例１と同様にして、粉末状消石灰を製造した（生石灰１００質量部に対するジエチレングリコールの添加量は１．３１質量部）。得られた粉末状消石灰のＢＥＴ比表面積、細孔容積及び消石灰接触後の水のＣＯＤMnを表１に示す。
[Comparative Example 2]
Powdered slaked lime was produced in the same manner as in Example 1 except that diethylene glycol was added to digested water so that its concentration was 1.20% by mass, and diatomaceous earth was not added (for 100 parts by mass of quick lime). The amount of diethylene glycol added is 1.31 parts by mass). Table 1 shows the BET specific surface area, pore volume, and COD Mn of water after slaked lime contact of the obtained powdered slaked lime.
表１
────────────────────────────────────────
生石灰１００質量部に対する添加物量
────────────────── ＢＥＴ 消石灰接触後の
ジエチレングリコール 珪藻土 比表面積 細孔容積 水のＣＯＤMn
（質量部） （質量部） （ｍ2／ｇ） （ｍＬ／ｇ）（ｍｇＯ／Ｌ）
────────────────────────────────────────
実施例１ ０．２３ １．１３ ４０．１ ０．２５ １１０
────────────────────────────────────────
比較例１ ０．２３ ０ ３３．０ ０．１９ １５０
比較例２ １．３１ ０ ４５．０ ０．２２ ８００
────────────────────────────────────────
Table 1
────────────────────────────────────────
Additive amount to 100 parts by weight of quicklime ────────────────── BET Diethylene glycol after contact with slaked lime Diatomaceous earth Specific surface area Pore volume Water COD Mn
(Mass part) (mass part) (m 2 / g) (mL / g) (mgO / L)
────────────────────────────────────────
Example 1 0.23 1.13 40.1 0.25 110
────────────────────────────────────────
Comparative Example 1 0.23 0 33.0 0.19 150
Comparative Example 2 1.31 0 45.0 0.22 800
────────────────────────────────────────
表１の結果から、ジエチレングリコールと珪藻土とを本発明の範囲にて添加した消化水を用いて製造した粉末状消石灰（実施例１）は、ジエチレングリコールのみを同量添加した消化水を用いて製造した粉末状消石灰（比較例１）と比べて、ＢＥＴ比表面積が約２０％向上し、かつ消石灰接触後の水のＣＯＤMnが約３０％減少することが分かる。また、消化水へのジエチレングリコールの添加量を多くすることによって、生成する粉末状消石灰のＢＥＴ比表面積は大きくなる（比較例２）が、消石灰接触後の水のＣＯＤMnが顕著に高くなることが分かる。 From the results of Table 1, powdered slaked lime (Example 1) produced using digested water to which diethylene glycol and diatomaceous earth were added within the scope of the present invention was produced using digested water to which only the same amount of diethylene glycol was added. Compared with powdered slaked lime (Comparative Example 1), the BET specific surface area is improved by about 20%, and COD Mn of water after slaked lime contact is reduced by about 30%. In addition, by increasing the amount of diethylene glycol added to the digested water, the BET specific surface area of the powdered slaked lime produced is increased (Comparative Example 2), but the COD Mn of water after slaked lime contact is significantly increased. I understand.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008209855A JP5306739B2 (en) | 2008-08-18 | 2008-08-18 | Slaked lime and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008209855A JP5306739B2 (en) | 2008-08-18 | 2008-08-18 | Slaked lime and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2010042970A true JP2010042970A (en) | 2010-02-25 |
| JP5306739B2 JP5306739B2 (en) | 2013-10-02 |
Family
ID=42014684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008209855A Active JP5306739B2 (en) | 2008-08-18 | 2008-08-18 | Slaked lime and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5306739B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012046366A (en) * | 2010-08-25 | 2012-03-08 | Kotegawa Sangyo Kk | Slaked lime, method for producing slaked lime and acidic gas removing agent |
| JP2013166133A (en) * | 2012-02-16 | 2013-08-29 | Kotegawa Sangyo Kk | Acidic gas remover and method of removing acidic gas |
| JP2013166676A (en) * | 2012-02-16 | 2013-08-29 | Kotegawa Sangyo Kk | Slaked lime, method for producing slaked lime and acid gas removing agent |
| JP2014140812A (en) * | 2013-01-23 | 2014-08-07 | Yoshizawa Lime Industry | Exhaust gas treatment agent and method of producing the same |
| JP2014237582A (en) * | 2014-07-05 | 2014-12-18 | 古手川産業株式会社 | Hydrated lime, manufacturing method of hydrated lime and acidic gas removing agent |
| JP2015085303A (en) * | 2013-11-01 | 2015-05-07 | 栗田工業株式会社 | Treatment method of acidic exhaust gas and exhaust gas treatment agent |
| JP2016128382A (en) * | 2016-02-18 | 2016-07-14 | 古手川産業株式会社 | Hydrated lime and acid gas remover |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09110423A (en) * | 1995-10-17 | 1997-04-28 | Ryoko Sekkai Kogyo Kk | Calcium hydroxide composition |
| JPH09278434A (en) * | 1996-04-04 | 1997-10-28 | Adachi Sekkai Kogyo Kk | Production of calcium hydroxide |
| JP2002284565A (en) * | 2001-03-27 | 2002-10-03 | Tanaka Sekkai Kogyo Kk | Conditioning burnt lime cream and conditioning coating compound of burnt lime cream |
| JP2004161536A (en) * | 2002-11-13 | 2004-06-10 | Yoshizawa Lime Industry | Method for producing highly reactive calcium hydroxide having improved handleability |
| JP2004168595A (en) * | 2002-11-20 | 2004-06-17 | Ube Material Industries Ltd | Method for manufacturing slaked lime |
| JP2005104754A (en) * | 2003-09-29 | 2005-04-21 | Kokan Kogyo Kk | Slaked lime with large specific surface area and its manufacturing method |
| JP2006273600A (en) * | 2005-03-28 | 2006-10-12 | Ryoko Lime Industry Co Ltd | Adhesion-suppressed slaked lime |
-
2008
- 2008-08-18 JP JP2008209855A patent/JP5306739B2/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09110423A (en) * | 1995-10-17 | 1997-04-28 | Ryoko Sekkai Kogyo Kk | Calcium hydroxide composition |
| JPH09278434A (en) * | 1996-04-04 | 1997-10-28 | Adachi Sekkai Kogyo Kk | Production of calcium hydroxide |
| JP2002284565A (en) * | 2001-03-27 | 2002-10-03 | Tanaka Sekkai Kogyo Kk | Conditioning burnt lime cream and conditioning coating compound of burnt lime cream |
| JP2004161536A (en) * | 2002-11-13 | 2004-06-10 | Yoshizawa Lime Industry | Method for producing highly reactive calcium hydroxide having improved handleability |
| JP2004168595A (en) * | 2002-11-20 | 2004-06-17 | Ube Material Industries Ltd | Method for manufacturing slaked lime |
| JP2005104754A (en) * | 2003-09-29 | 2005-04-21 | Kokan Kogyo Kk | Slaked lime with large specific surface area and its manufacturing method |
| JP2006273600A (en) * | 2005-03-28 | 2006-10-12 | Ryoko Lime Industry Co Ltd | Adhesion-suppressed slaked lime |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012046366A (en) * | 2010-08-25 | 2012-03-08 | Kotegawa Sangyo Kk | Slaked lime, method for producing slaked lime and acidic gas removing agent |
| JP2013166133A (en) * | 2012-02-16 | 2013-08-29 | Kotegawa Sangyo Kk | Acidic gas remover and method of removing acidic gas |
| JP2013166676A (en) * | 2012-02-16 | 2013-08-29 | Kotegawa Sangyo Kk | Slaked lime, method for producing slaked lime and acid gas removing agent |
| JP2014140812A (en) * | 2013-01-23 | 2014-08-07 | Yoshizawa Lime Industry | Exhaust gas treatment agent and method of producing the same |
| JP2015085303A (en) * | 2013-11-01 | 2015-05-07 | 栗田工業株式会社 | Treatment method of acidic exhaust gas and exhaust gas treatment agent |
| JP2014237582A (en) * | 2014-07-05 | 2014-12-18 | 古手川産業株式会社 | Hydrated lime, manufacturing method of hydrated lime and acidic gas removing agent |
| JP2016128382A (en) * | 2016-02-18 | 2016-07-14 | 古手川産業株式会社 | Hydrated lime and acid gas remover |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5306739B2 (en) | 2013-10-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5306739B2 (en) | Slaked lime and method for producing the same | |
| JP5584290B2 (en) | Process for the preparation of surface-reacted calcium carbonate using weak acids, the products obtained and their use | |
| Fungaro et al. | Adsorption and kinetic studies of methylene blue on zeolite synthesized from fly ash | |
| CN109012575A (en) | A method of improving roasting specific surface area of diatomite and adsorption capacity | |
| KR20090094117A (en) | Lightweight calcium carbonate, process for producing the same, and printing paper containing the same | |
| WO2016185033A1 (en) | Lime-based sorbent composition for mercury removal and its manufacturing process | |
| JP2010180086A (en) | Method for producing slaked lime | |
| JP5165213B2 (en) | Calcium oxide powder and method for producing the same | |
| JP5667758B2 (en) | Slaked lime, method for producing the same, and acid gas removing agent | |
| Castro et al. | Production of nanostructured crystalline composite using residual ashes from flocculated sludge burning process in a poultry slaughterhouse wastewater treatment system | |
| JP2004043290A (en) | Method of manufacturing porous calcium silicate and porous calcium silicate | |
| JP4541042B2 (en) | Powdered activated carbon for water treatment and method for producing the same | |
| JP2002114543A (en) | Method for manufacturing highly reactive calcium hydroxide | |
| JP2007197319A (en) | High-activity slaked lime | |
| JP5099349B2 (en) | Adsorbent | |
| JP6158385B1 (en) | Method for producing sulfur compound remover | |
| JP2003300725A (en) | Manufacture of highly activated slaked lime | |
| JP2014140812A (en) | Exhaust gas treatment agent and method of producing the same | |
| KR20100097479A (en) | Preparation method of quicklime and hydrated lime for removing sulfur oxides using residual wastes of ground limestone for paper manufacture | |
| JP2008247637A (en) | Method for manufacturing calcium carbonate | |
| JPS6214985A (en) | Method for removing phosphorus | |
| JP2006169062A (en) | Porous particulate containing calcium oxide | |
| SU1685871A1 (en) | Method for obtaining chemically deposited calcium carbonate | |
| JP2008266051A (en) | Method of producing slaked lime slurry | |
| JP2005272238A (en) | Method of producing slaked lime |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20110801 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20120813 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20130618 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20130626 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 Ref document number: 5306739 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |