JPH1082891A - Contaminated concrete waste disposal method - Google Patents
Contaminated concrete waste disposal methodInfo
- Publication number
- JPH1082891A JPH1082891A JP23906696A JP23906696A JPH1082891A JP H1082891 A JPH1082891 A JP H1082891A JP 23906696 A JP23906696 A JP 23906696A JP 23906696 A JP23906696 A JP 23906696A JP H1082891 A JPH1082891 A JP H1082891A
- Authority
- JP
- Japan
- Prior art keywords
- concrete waste
- fine particles
- waste
- contaminated
- fine
- 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
- 239000002699 waste material Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 239000010419 fine particle Substances 0.000 claims description 39
- 239000011362 coarse particle Substances 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 13
- 239000000945 filler Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000003344 environmental pollutant Substances 0.000 claims description 7
- 231100000719 pollutant Toxicity 0.000 claims description 7
- 239000000356 contaminant Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000010298 pulverizing process Methods 0.000 claims description 5
- 239000004568 cement Substances 0.000 abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000000227 grinding Methods 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 abstract 2
- 238000012856 packing Methods 0.000 abstract 1
- 239000004570 mortar (masonry) Substances 0.000 description 16
- 239000000428 dust Substances 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- 239000002893 slag Substances 0.000 description 5
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、汚染されたコン
クリート廃棄物の処理方法に関する。The present invention relates to a method for treating contaminated concrete waste.
【０００２】[0002]
【従来の技術】従来、汚染コンクリート廃棄物の処理方
法としては、図５に示すものがある。図５に示すよう
に、原子力発電所１０１や再処理施設１０２を解体した
ときに、放射能で汚染された汚染廃棄物１０３が生じ
る。この汚染廃棄物１０３は、放射能で汚染された汚染
コンクリート廃棄物１０５と、鉄骨等を含むその他の廃
棄物１０４とを含んでいる。2. Description of the Related Art FIG. 5 shows a conventional method for treating contaminated concrete waste. As shown in FIG. 5, when the nuclear power plant 101 and the reprocessing facility 102 are dismantled, contaminated waste 103 contaminated with radioactivity is generated. The contaminated waste 103 includes contaminated concrete waste 105 contaminated by radioactivity and other waste 104 including steel frames and the like.
【０００３】上記汚染コンクリート廃棄物１０５は、人
頭大程度に破砕されてから、生コンプラント１０７から
供給された充填モルタル１０８と混合され、ドラム缶１
１０に充填される。このドラム缶１１０は、コンクリー
トピット内に配置され、土中に埋設されて、最終貯蔵さ
れる。[0003] The above-mentioned contaminated concrete waste 105 is crushed to the size of a human head, and then mixed with a filling mortar 108 supplied from a ready-mixed plant 107.
10 are filled. The drum 110 is placed in a concrete pit, buried in the soil, and finally stored.
【０００４】[0004]
【発明が解決しようとする課題】ところが、上記従来の
処理方法では、解体時に発生した汚染コンクリート廃棄
物１０５に、別途、充填モルタル１０８を混合する。図
５の括弧内の数字が示すように、上記廃棄物１０の重量
割合１.０に対して上記充填モルタル１０８の重量割合
は２.３に達する。したがって、上記従来の処理方法で
は、最終的に貯蔵しなければならない廃棄物の量が、解
体時の汚染コンクリート廃棄物１０５の量の３倍以上に
なるという問題がある。However, in the above-mentioned conventional processing method, a filling mortar 108 is separately mixed with the contaminated concrete waste 105 generated at the time of dismantling. As shown by the numbers in parentheses in FIG. 5, the weight ratio of the filling mortar 108 reaches 2.3 with respect to the weight ratio of the waste 10 of 1.0. Therefore, the conventional treatment method has a problem that the amount of waste finally stored must be three times or more the amount of contaminated concrete waste 105 at the time of dismantling.
【０００５】そこで、この発明の目的は、最終的な廃棄
物の量を低減することができる汚染コンクリート廃棄物
の処理方法を提供することにある。Accordingly, an object of the present invention is to provide a method for treating contaminated concrete waste capable of reducing the amount of final waste.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、請求項１の発明は、汚染されたコンクリート廃棄物
を粉砕して、比較的モルタル分が多い粒径が略５ｍｍ以
下の細粒分と、粒径が略５ｍｍを越える粗粒分とに分け
る第１の工程と、上記細粒分を微粉砕して、自硬性の微
粉末を製造する第２の工程と、上記微粉末に所定の水分
を混合して、充填材を製造する第３の工程と、上記粗粒
分を所定の容器に詰め込むと共に、この容器内に上記充
填材を充填して、上記粗粒分を一体的に固化する第４の
工程とを備えることを特徴としている。In order to achieve the above-mentioned object, the invention of claim 1 crushes contaminated concrete waste to obtain fine particles having a relatively large mortar content and a particle size of about 5 mm or less. A first step of dividing the fine particles into coarse particles having a particle size of more than about 5 mm; a second step of pulverizing the fine particles to produce a self-hardening fine powder; A third step of producing a filler by mixing water, and filling the coarse particles into a predetermined container, and filling the container with the filler to integrally integrate the coarse particles. And a fourth step of solidifying.
【０００７】この請求項１の発明によれば、コンクリー
ト廃棄物を容器内に一体的に固化させるための充填材
を、上記コンクリート廃棄物を粉砕したときにできた粒
径が略５ｍｍ以下の細粒分から作製する。したがって、
この発明によれば、上記汚染コンクリート廃棄物を容器
内に充填して固化させたときの最終的な廃棄物の量が、
解体時に発生した汚染コンクリート廃棄物の量からほと
んど増加しない。したがって、この発明によれば、最終
的な廃棄物の量を従来の数分の１に低減させることがで
きる。According to the first aspect of the present invention, the filler for solidifying the concrete waste in the container is made of a fine material having a particle size of about 5 mm or less when the concrete waste is crushed. It is made from grains. Therefore,
According to this invention, the amount of final waste when the contaminated concrete waste is filled in a container and solidified is:
Little increase from the amount of contaminated concrete waste generated during demolition. Therefore, according to the present invention, the final amount of waste can be reduced to a fraction of the conventional value.
【０００８】また、請求項２の発明は、請求項１に記載
の汚染コンクリート廃棄物の処理方法において、上記細
粒分を加熱乾燥させ、この加熱乾燥の過程で上記細粒分
から発生する汚染物質含有ガスを回収して、このガスか
ら上記汚染物質を除去して上記汚染物質が大気中に拡散
しないようにするガス処理工程を備えていることを特徴
としている。According to a second aspect of the present invention, in the method for treating contaminated concrete waste according to the first aspect, the fine particles are heated and dried, and contaminants generated from the fine particles in the heating and drying process. The method is characterized by comprising a gas processing step of recovering the contained gas and removing the pollutant from the gas to prevent the pollutant from diffusing into the atmosphere.
【０００９】この請求項２の発明によれば、細粒分を加
熱乾燥させて、再生セメントあるいは再生モルタルを製
造するに際し、大気中に汚染ガスが拡散しないようにで
きる。According to the second aspect of the present invention, when producing the recycled cement or the recycled mortar by heating and drying the fine particles, the pollutant gas can be prevented from diffusing into the atmosphere.
【００１０】[0010]
【発明の実施の形態】以下、この発明を図示の実施の形
態により詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
【００１１】〔第１の実施の形態〕図１に、この発明の
汚染コンクリート廃棄物の処理方法の第１の実施の形態
の処理工程を示す。この第１の実施の形態は、原子力発
電所を解体したときにできた放射能で汚染された汚染廃
棄物１を処理する方法である。[First Embodiment] FIG. 1 shows the processing steps of a first embodiment of the method for treating contaminated concrete waste according to the present invention. The first embodiment is a method for treating contaminated waste 1 contaminated with radioactivity generated when a nuclear power plant is dismantled.
【００１２】まず、この汚染廃棄物１は、コンクリート
廃棄物２と、その他の鉄骨等の廃棄物３とに分別され
る。First, this contaminated waste 1 is separated into concrete waste 2 and other wastes 3 such as steel frames.
【００１３】次に、上記コンクリート廃棄物２を、クラ
ッシャー５で砕いてから、比較的モルタル分が多い粒径
が５ｍｍ以下の細粒分６と粒径が５ｍｍを越える粗粒分
７とに分ける(第１の工程)。Next, the concrete waste 2 is crushed by a crusher 5 and then divided into fine particles 6 having a relatively large amount of mortar and having a particle size of 5 mm or less and coarse particles 7 having a particle size exceeding 5 mm. (First step).
【００１４】次に、上記粒径が５ｍｍ以下の細粒分６
は、加熱粉砕機８によって加熱され、かつ、粉砕され
て、微粉末としてブレーン値(粉末度)５０００〜８００
０ｃｍ2／ｇの微細粒分１０になされる(第２の工程)。Next, the fine particles 6 having a particle size of 5 mm or less
Is heated and pulverized by the heat pulverizer 8, and has a Blaine value (fineness) of 5,000 to 800 as fine powder.
Fine particles 10 of 0 cm 2 / g are formed (second step).
【００１５】次に、この微細粒分１０に所定量の水を添
加して、混練器１１で上記微細粒分１０と上記所定量の
水とを混合し、充填材としてのセメントペースト１２に
練り上げる(第３の工程)。Next, a predetermined amount of water is added to the fine particles 10, and the fine particles 10 and the predetermined amount of water are mixed in a kneader 11 and kneaded into a cement paste 12 as a filler. (Third step).
【００１６】一方、上記粒径が５ｍｍを越える粗粒分７
は、粗骨材として小割りされて整形されてから、ドラム
缶１３に詰め込まれる。また、上記鉄骨等の廃棄物３も
切断されて成形されてからドラム缶１３に詰め込まれ
る。On the other hand, the coarse particles 7 having a particle size exceeding 5 mm
Is divided into small pieces as coarse aggregate and shaped, and then packed in the drum 13. Further, the waste 3 such as the above-mentioned steel frame is cut and formed, and then packed in the drum 13.
【００１７】次に、上記粗粒分７が粗骨材として詰め込
まれているドラム缶１３に、上記充填材としてのセメン
トペースト１２が充填されて、上記粗粒分７はドラム缶
１３内で一体的に固化される(第４の工程)。Next, a cement 13 as a filler is filled in a drum 13 in which the coarse particles 7 are packed as coarse aggregate, and the coarse particles 7 are integrally formed in the drum 13. It is solidified (fourth step).
【００１８】次に、上記ドラム缶１３は、コンクリート
ピット１５内に並べられてから、さらに、コンクリート
が流し込まれて固められる。そして、そのコンクリート
の上に土砂１７が盛られて、最終貯蔵状態になる。Next, the drums 13 are arranged in the concrete pit 15, and then concrete is poured and hardened. And the earth and sand 17 are piled on the concrete, and it is in a final storage state.
【００１９】この第１の実施形態によれば、コンクリー
ト廃棄物２をドラム缶１３内に一体的に固化させるため
のセメントペースト１２を、コンクリート廃棄物２を粉
砕したときにできた粒径が５ｍｍ以下の細粒分６から作
製する。したがって、この第１実施形態によれば、汚染
コンクリート廃棄物２をドラム缶１３内に充填して固化
させたときの最終的な廃棄物の量が、解体時に発生した
汚染コンクリート廃棄物２の量からほとんど増加しな
い。したがって、この実施形態によれば、最終的な廃棄
物の量を従来の数分の１に低減させることができる。し
たがって、貯蔵スペースの削減を図れる。According to the first embodiment, the cement paste 12 for integrally solidifying the concrete waste 2 in the drum 13 has a particle size of 5 mm or less when the concrete waste 2 is crushed. It is prepared from fine particles 6 of the above. Therefore, according to the first embodiment, the final amount of waste when the contaminated concrete waste 2 is filled in the drum 13 and solidified is determined from the amount of the contaminated concrete waste 2 generated at the time of dismantling. Hardly increases. Therefore, according to this embodiment, the final amount of waste can be reduced to a fraction of the conventional amount. Therefore, the storage space can be reduced.
【００２０】尚、上記第１の実施形態の上記第２工程に
おいて、上記加熱粉砕機８に高炉水滓を供給して、細粒
分６と乾燥した高炉水滓とを粉砕して混合して、微粉末
としての微細粒分１０を製造してもよい。高炉水滓とは
高炉スラグを急冷してガラス化させたものである。この
場合には、水を添加する第３の工程において、上記微粒
分６からのコンクリート粉末が上記高炉水滓の水硬性を
顕在化する水和反応が生じる。したがって、上記充填材
としてのセメントペースト１２が粗粒分７をドラム缶１
３内に固化させる固化強度を向上させることができる。In the second step of the first embodiment, the blast furnace slag is supplied to the heating and crushing machine 8 to crush and mix the fine particles 6 and the dried blast furnace slag. Alternatively, fine particles 10 as fine powder may be produced. The blast furnace slag is obtained by rapidly cooling the blast furnace slag to vitrify it. In this case, in the third step of adding water, a hydration reaction occurs in which the concrete powder from the fine particles 6 manifests the hydraulicity of the blast furnace slag. Therefore, the cement paste 12 as the filler fills the coarse particles 7 with the drum 1
The solidification strength of the solidification in the solid 3 can be improved.
【００２１】〔第２の実施の形態〕次に、図２に、この
発明の第２の実施の形態の廃棄物処理工程を示す。この
第２の実施形態は、図１の第１工程の後に、第２工程で
細粒分６の一部を加熱粉砕機８で加熱，粉砕して微細粒
分１０にする一方、第３工程で上記細粒分６の残分を細
骨材として、上記微細粒分１０と混合し(破線Ａで囲ん
だ工程)、さらに、所定量の水を添加して、混練器１１
でモルタル２２に練り上げる点だけが、上記第１の実施
形態と異なる。[Second Embodiment] Next, FIG. 2 shows a waste disposal process according to a second embodiment of the present invention. In the second embodiment, after the first step of FIG. 1, a part of the fine particles 6 is heated and pulverized by the heating / pulverizer 8 in the second step to obtain the fine particles 10, while the third step Then, the residue of the fine particles 6 is mixed as fine aggregate with the fine particles 10 (step surrounded by a broken line A), and a predetermined amount of water is added thereto.
The only difference from the first embodiment is that the mortar 22 is kneaded.
【００２２】この第２の実施形態によれば、上記細粒分
６が粉砕されてできた微細粒分１０に、細粒分６自体を
細骨材として混合させて、モルタル２２を製造するか
ら、このモルタル２２の固化強度を第１実施例のセメン
トペースト１２よりも高くすることができる。したがっ
て、モルタル２２が粗粒分７をドラム缶１３内に固化さ
せる固化強度を向上できる。したがって、このドラム缶
１３の強度が高まり、貯蔵のための積み上げ段数を増大
できるから、大量貯蔵が容易になる。According to the second embodiment, the mortar 22 is manufactured by mixing the fine particles 6 as fine aggregate with the fine particles 10 obtained by pulverizing the fine particles 6. The solidification strength of the mortar 22 can be higher than that of the cement paste 12 of the first embodiment. Therefore, the solidification strength of the mortar 22 for solidifying the coarse particles 7 in the drum 13 can be improved. Therefore, the strength of the drum 13 is increased, and the number of stacking stages for storage can be increased, so that mass storage is facilitated.
【００２３】〔第３の実施の形態〕次に、図３に、この
発明の第３の実施の形態の廃棄物処理工程を示す。この
第３の実施形態は、図１の第２工程の後に、第３工程
で、細骨材３１が混練器１１に外部から供給される点
(破線Ｂで囲んだ工程)だけが第１の実施形態と異なる。[Third Embodiment] Next, FIG. 3 shows a waste disposal process according to a third embodiment of the present invention. The third embodiment is different from the third embodiment in that fine aggregates 31 are supplied to the kneader 11 from the outside in the third step after the second step in FIG.
Only (steps surrounded by a broken line B) is different from the first embodiment.
【００２４】この第３の実施形態によれば、第３工程で
外部から供給された細骨材３１を、細粒分６から形成さ
れた微粉末としての微細粒分１０に混ぜて、充填材とし
てのモルタル３２を製造する。したがって、モルタル３
２が粗粒分７を固化する固化強度を向上できる。この第
３実施形態では、第２実施形態のように細粒分６を一部
(微細粒分１０)とその残分(細骨材にする分)とに分けな
くてもよくなる。したがって、第２実施工程よりも工程
が簡単になる。According to the third embodiment, the fine aggregate 31 supplied from the outside in the third step is mixed with the fine particles 10 as the fine powder formed from the fine particles 6 to form a filler. Mortar 32 is manufactured. Therefore, mortar 3
2 can improve the solidification strength of solidifying the coarse particles 7. In the third embodiment, the fine particles 6 are partially formed as in the second embodiment.
It is not necessary to divide into (the fine-grained portion 10) and the remainder (the portion to be fine aggregate). Therefore, the process is simpler than the second implementation process.
【００２５】尚、上記第１,第２,第３の実施形態の第２
工程において、上記加熱粉砕機８で細粒分６を加熱して
乾燥させているときに、上記細粒分６から発生する有害
な放射性物質を含んだガスを回収して大気中に拡散しな
いようにすれば、大気中に汚染ガスを拡散させることな
く、細粒分６を加熱乾燥させて、セメントペースト１２
あるいはモルタル２２,３２を製造できる。It should be noted that the second, third, and third embodiments of the present invention
In the process, when the fine particles 6 are heated and dried by the heating and crushing machine 8, a gas containing harmful radioactive substances generated from the fine particles 6 is collected so as not to diffuse into the atmosphere. In this case, the fine particles 6 are heated and dried without diffusing the pollutant gas into the atmosphere, and the cement paste 12
Alternatively, mortars 22 and 32 can be manufactured.
【００２６】このような汚染ガス回収装置の一例を図４
に示す。この汚染ガス回収装置５１には、乾燥機５２か
ら生じた有害ガスや粉塵が導入される。乾燥機５２には
加熱装置５３からの熱風が供給される。また、乾燥機５
２からは乾燥された細粒分６が送り出される。An example of such a contaminated gas recovery apparatus is shown in FIG.
Shown in To this contaminated gas recovery device 51, harmful gas and dust generated from the dryer 52 are introduced. Hot air from a heating device 53 is supplied to the dryer 52. In addition, dryer 5
From 2, dried fine particles 6 are sent out.
【００２７】一方、上記回収装置５１は、エアフィルタ
５５と洗浄塔５６と吸着塔５７とを備えている。上記洗
浄塔５６は貯槽５６Ａと充填層５６Ｂとデミスター(除
湿層)５６Ｃを有する。上記貯槽５６Ａに貯留された液
はポンプ６０で汲み上げられてスプレーノズル６１から
上記充填層５６Ｂに吹き付けられる。また、上記デミス
ター５６Ｃを通過したガスは送風機６２を経て吸着塔５
７に送出されて粉塵が吸着されて除去される。この吸着
塔５７には吸着剤や特殊活性炭が内蔵されている。ま
た、上記洗浄塔５６では、上記貯槽５６Ａ内の液体の状
態を検出器６３で検出し、この検出結果に基づいて、薬
注入ポンプ６５が駆動される。この薬注入ポンプ６５の
駆動により、薬液貯槽６６から上記貯槽５６Ａに薬液が
注入される。On the other hand, the recovery device 51 includes an air filter 55, a washing tower 56, and an adsorption tower 57. The washing tower 56 has a storage tank 56A, a packed layer 56B, and a demister (dehumidifying layer) 56C. The liquid stored in the storage tank 56A is pumped up by a pump 60 and sprayed from a spray nozzle 61 onto the filling layer 56B. The gas that has passed through the demister 56C passes through the blower 62 and passes through the adsorption tower 5C.
7, and the dust is adsorbed and removed. The adsorption tower 57 contains an adsorbent and special activated carbon. In the washing tower 56, the state of the liquid in the storage tank 56A is detected by the detector 63, and the chemical injection pump 65 is driven based on the detection result. By driving the chemical injection pump 65, the chemical is injected from the chemical storage tank 66 into the storage tank 56A.
【００２８】上記発生ガスや粉塵は、まず、上記エアフ
ィルタ５５を通過したときに、粉塵が濾過されて、洗浄
塔５６に導入される。この洗浄塔５６では、上記有害ガ
スや粉塵は、充填層５６Ｂとデミスター５６Ｃを通過す
るときに、有害な汚染物質が除去される。そして、上記
吸着塔５７を経て粉塵と汚染物質が取り除かれたガスが
排出される。When the generated gas and dust pass through the air filter 55, the dust is filtered and introduced into the washing tower 56. In the washing tower 56, when the harmful gas and dust pass through the packed bed 56B and the demister 56C, harmful pollutants are removed. Then, the gas from which dust and contaminants have been removed is discharged through the adsorption tower 57.
【００２９】この汚染ガス回収装置は、２０℃程度の低
温で有害ガスを発生するような例えば有機水銀を含有し
たコンクリート施設を解体する場合に特に有効である。This contaminated gas recovery apparatus is particularly effective when dismantling a concrete facility containing, for example, organic mercury, which generates harmful gas at a low temperature of about 20 ° C.
【００３０】尚、上記第１,第２,第３の実施形態では、
放射能で汚染されたコンクリート廃棄物２を処理する方
法について説明したが、本発明の適用は、放射性コンク
リート廃棄物２の処理に限らず、化学薬品等の有害物質
で汚染されたコンクリート廃棄物の処理にも適用するこ
とができる。また、上記第１,第２,第３の実施形態で
は、容器としてドラム缶１３を用いたが、容器はドラム
缶１３に限らないことは勿論であり、ドラム缶とは別の
形態の金属製容器であってもよく、樹脂製やガラス製の
容器であってもよい。In the first, second, and third embodiments,
Although the method for treating the concrete waste 2 contaminated with radioactivity has been described, the application of the present invention is not limited to the treatment of the radioactive concrete waste 2 but also for the concrete waste 2 contaminated with harmful substances such as chemicals. It can also be applied to processing. In the first, second, and third embodiments, the drum 13 is used as the container. However, the container is not limited to the drum 13 and may be a metal container having a different form from the drum. Or a container made of resin or glass.
【００３１】[0031]
【発明の効果】以上より明らかなように、請求項１の発
明は、汚染されたコンクリート廃棄物を粉砕して、粒径
が略５ｍｍ以下の細粒分と、粒径が略５ｍｍを越える粗
粒分とに分ける第１の工程と、比較的モルタル分が多い
上記細粒分を微粉砕して、自硬性の微粉末を製造する第
２の工程と、上記微粉末に所定の水分を混合して、充填
材を製造する第３の工程と、上記粗粒分を所定の容器に
詰め込むと共に、この容器内に上記充填材を充填して、
上記粗粒分を一体的に固化する第４の工程とを備える。As is apparent from the above description, the invention of claim 1 crushes contaminated concrete waste to obtain fine particles having a particle size of about 5 mm or less and coarse particles having a particle size of about 5 mm or more. A first step of dividing into fine particles, a second step of pulverizing the fine particles having a relatively large amount of mortar to produce self-hardening fine powder, and mixing a predetermined moisture with the fine powder. And a third step of producing a filler, and filling the coarse particles into a predetermined container, and filling the container with the filler,
A fourth step of integrally solidifying the coarse particles.
【００３２】この請求項１の発明によれば、コンクリー
ト廃棄物を容器内に一体的に固化させるための充填材
を、コンクリート廃棄物を粉砕したときにできた粒径が
５ｍｍ以下の細粒分から作製する。したがって、この発
明によれば、汚染コンクリート廃棄物を容器内に充填し
て固化させたときの最終的な廃棄物の量が、解体時に発
生した汚染コンクリート廃棄物の量からほとんど増加し
ない。従って、この発明によれば、最終的な廃棄物の量
を従来の数分の１に低減させることができる。According to the first aspect of the present invention, the filler for solidifying the concrete waste in the container is formed from fine particles having a particle size of 5 mm or less formed by crushing the concrete waste. Make it. Therefore, according to the present invention, the amount of the final waste when the contaminated concrete waste is filled in the container and solidified hardly increases from the amount of the contaminated concrete waste generated at the time of dismantling. Therefore, according to the present invention, the final amount of waste can be reduced to a fraction of the conventional value.
【００３３】また、請求項２の発明は、請求項１に記載
の汚染コンクリート廃棄物の処理方法において、上記細
粒分を加熱乾燥させ、この加熱乾燥の過程で上記細粒分
から発生する汚染物質含有ガスを回収して、このガスか
ら上記汚染物質を除去して上記汚染物質が大気中に拡散
しないようにするガス処理工程を備えている。According to a second aspect of the present invention, in the method for treating contaminated concrete waste according to the first aspect, the fine particles are heated and dried, and contaminants generated from the fine particles in the heating and drying process. A gas treatment step is provided for recovering the contained gas and removing the contaminants from the gas so that the contaminants do not diffuse into the atmosphere.
【００３４】この請求項２の発明によれば、細粒分を加
熱乾燥させて、再生セメントあるいは再生モルタルを製
造するに際し、大気中に汚染ガスが拡散しないようにで
きる。According to the second aspect of the present invention, when producing the regenerated cement or regenerated mortar by heating and drying the fine particles, it is possible to prevent the pollutant gas from diffusing into the atmosphere.
【図１】 この発明の汚染コンクリート廃棄物の処理方
法の第１実施形態の工程を示す図である。FIG. 1 is a diagram showing steps of a first embodiment of a method for treating contaminated concrete waste according to the present invention.
【図２】 この発明の第２実施形態の工程を示す図であ
る。FIG. 2 is a view showing a process of a second embodiment of the present invention.
【図３】 この発明の第３実施形態の工程を示す図であ
る。FIG. 3 is a view showing a process of a third embodiment of the present invention.
【図４】 上記第１〜第３実施形態の変形例で用いる汚
染ガス回収装置の構成図である。FIG. 4 is a configuration diagram of a contaminated gas recovery device used in a modification of the first to third embodiments.
【図５】 従来の汚染コンクリート廃棄物の処理方法の
工程を示す図である。FIG. 5 is a diagram showing steps of a conventional method for treating contaminated concrete waste.
１…汚染廃棄物、２…コンクリート廃棄物、３…鉄骨等
の廃棄物、５…クラッシャー、６…細粒分、７…粗粒
分、８…加熱粉砕機、１０…微細粒分、１１…混練器、
１２…セメントペースト、１３…ドラム缶、１５…コン
クリートピット、１７…土砂、２２,２３…モルタル、
５１…汚染ガス回収装置、５２…乾燥機、５５…エアフ
ィルタ、５６…洗浄塔、５７…吸着塔。DESCRIPTION OF SYMBOLS 1 ... Contaminated waste, 2 ... Concrete waste, 3 ... Steel frame waste, 5 ... Crusher, 6 ... Fine grain, 7 ... Coarse grain, 8 ... Heat crusher, 10 ... Fine grain, 11 ... Kneader,
12: cement paste, 13: drum, 15: concrete pit, 17: earth and sand, 22, 23: mortar,
51: Contaminated gas recovery device, 52: Dryer, 55: Air filter, 56: Washing tower, 57: Adsorption tower.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松田 敦夫 大阪府大阪市阿倍野区松崎町２丁目２番２ 号 株式会社奥村組内 (72)発明者 岩本 容昭 大阪府大阪市阿倍野区松崎町２丁目２番２ 号 株式会社奥村組内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Atsuo Matsuda 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi, Osaka Prefecture Inside Okumura Gumi Co., Ltd. No. 2 No. 2 Okumura Gumi
Claims (2)
て、粒径が略５ｍｍ以下の細粒分と、粒径が略５ｍｍを
越える粗粒分とに分ける第１の工程と、 上記細粒分を微粉砕して、自硬性の微粉末を製造する第
２の工程と、 上記微粉末に所定の水分を混合して、充填材を製造する
第３の工程と、 上記粗粒分を所定の容器に詰め込むと共に、この容器内
に上記充填材を充填して、上記粗粒分を一体的に固化す
る第４の工程とを備えることを特徴とする汚染コンクリ
ート廃棄物の処理方法。A first step of pulverizing contaminated concrete waste into fine particles having a particle size of about 5 mm or less and coarse particles having a particle size of more than about 5 mm; A second step of pulverizing the fine powder to produce a self-hardening fine powder; a third step of mixing a predetermined moisture with the fine powder to produce a filler; And a fourth step of filling the container with the filler and solidifying the coarse particles integrally.
物の処理方法において、 上記細粒分を加熱乾燥させ、この加熱乾燥の過程で上記
細粒分から発生する汚染物質含有ガスを回収して、この
ガスから上記汚染物質を除去して大気中に拡散しないよ
うにするガス処理工程を備えていることを特徴とする汚
染コンクリート廃棄物の処理方法。2. The method for treating contaminated concrete waste according to claim 1, wherein the fine particles are heated and dried, and a contaminant-containing gas generated from the fine particles in the heating and drying process is recovered. A method for treating contaminated concrete waste, comprising a gas treatment step for removing the pollutant from the gas so as not to diffuse into the atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23906696A JP3200018B2 (en) | 1996-09-10 | 1996-09-10 | Treatment of contaminated concrete waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23906696A JP3200018B2 (en) | 1996-09-10 | 1996-09-10 | Treatment of contaminated concrete waste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1082891A true JPH1082891A (en) | 1998-03-31 |
| JP3200018B2 JP3200018B2 (en) | 2001-08-20 |
Family
ID=17039359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23906696A Expired - Lifetime JP3200018B2 (en) | 1996-09-10 | 1996-09-10 | Treatment of contaminated concrete waste |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3200018B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002131481A (en) * | 2000-10-26 | 2002-05-09 | Toshiba Corp | Method of solidification of radioactive waste |
| JP2008026116A (en) * | 2006-07-20 | 2008-02-07 | Shimizu Corp | Treating method of radioactive concrete |
-
1996
- 1996-09-10 JP JP23906696A patent/JP3200018B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002131481A (en) * | 2000-10-26 | 2002-05-09 | Toshiba Corp | Method of solidification of radioactive waste |
| JP2008026116A (en) * | 2006-07-20 | 2008-02-07 | Shimizu Corp | Treating method of radioactive concrete |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3200018B2 (en) | 2001-08-20 |
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