（実施例１〜１５）
活性炭スラリー形成部（直径２００ｍｍ、直胴長２８０ｍｍ）、無底筒体（直径８０ｍｍ、長さ３３０ｍｍ）、及び攪拌翼を備えた図１に示す活性炭スラリー製造装置を用いて活性炭スラリーを製造した。なお、活性炭スラリー形成部の直径とは活性炭スラリー形成部の内径を指し、直胴長とは活性炭スラリー形成部の直胴部分の長さ（高さ）を指す。攪拌翼は無底筒体の内部に同芯状に配置し、無底筒体に活性炭スラリー形成部と通じる上部連通孔（活性炭スラリー形成部の底部から上部連通孔の上端までの距離ｈ０：１６７ｍｍ）及び底部連通孔（活性炭スラリー形成部の底部から底部連通孔までの距離ｈ１：２０ｍｍ）を設けた。さらに、攪拌翼として、上部連通孔の下端から下方向へ１３ｍｍの位置に上翼、及び無底筒体の底部連通孔から上方向へ３０ｍｍの位置に下翼を配置した。そして、無底筒体の上部連通孔の上端から活性炭スラリー形成部の水面までの距離Δｈが１３〜５３ｍｍとなるようにろ過水を張り、上翼及び下翼により無底筒体の内部に渦巻流を形成させ、巻き込まれた空気が底部連通孔を通過して水面に浮きあがる状態となる直前に、粉末活性炭（商品名：太閤Ｗ、二村化学株式会社製）１２．５ｋｇ／ｈを投入し、攪拌数ｎ１を７００、７５０及び８００ｒｐｍとして、上部連通孔及び底部連通孔を通じて活性炭を循環させた。このときの渦巻流のボルテックス角度は３５．５〜４８．０°であった。２．７〜３．３分後、濃度が１０重量％の均一な活性炭スラリーが得られた。その後、ろ過水を１１２．５ｋｇ／ｈの一定量で供給し、活性炭を１２．５ｋｇ／ｈの一定量で供給することにより、連続的に濃度が１０重量％の活性炭スラリーが得られた。なお、実施例１４は上部連通孔の下端から下方向へ１３ｍｍの位置に上翼のみを設けた例、実施例１５は無底筒体の底部連通孔から上方向へ３０ｍｍの位置に下翼のみを設けた例である。
(Examples 1 to 15)
Activated carbon slurry formation section (diameter 200 mm, a straight body length 280 mm), a bottomless cylindrical body (diameter 80 mm, length 330 mm), and was produced activated carbon slurried with activated carbon slurry manufacturing apparatus shown in FIG. 1 with a stirring blade. The diameter of the activated carbon slurry forming portion refers to the inner diameter of the activated carbon slurry forming portion, and the straight body length refers to the length (height) of the straight body portion of the activated carbon slurry forming portion. The stirring blades are arranged concentrically inside the bottomless cylinder, and the upper communication hole (the distance h 0 from the bottom of the activated carbon slurry formation part to the upper end of the upper communication hole) communicates with the activated carbon slurry formation part in the bottomless cylinder. 167 mm) and a bottom communication hole (distance h 1 from the bottom of the activated carbon slurry forming part to the bottom communication hole: 20 mm). Further, as the stirring blade, an upper blade was disposed at a position 13 mm downward from the lower end of the upper communication hole, and a lower blade was disposed at a position 30 mm upward from the bottom communication hole of the bottomless cylindrical body. Then, filtered water is applied so that the distance Δh from the upper end of the upper communication hole of the bottomless cylindrical body to the water surface of the activated carbon slurry forming portion is 13 to 53 mm, and the spiral is swirled inside the bottomless cylindrical body by the upper blade and the lower blade. Immediately before the entrained air passes through the bottom communication hole and floats on the water surface, 12.5 kg / h of powdered activated carbon (trade name: Dazai W, manufactured by Nimura Chemical Co., Ltd.) is charged. the stirring speed n 1 as 700, 750 and 800 r pm, was circulated activated carbon through the upper communication hole and bottom communication hole. The vortex angle of the spiral flow at this time was 35.5 to 48.0 °. After 2.7 to 3.3 minutes, a uniform activated carbon slurry having a concentration of 10% by weight was obtained. Then, activated carbon slurry having a concentration of 10% by weight was continuously obtained by supplying a constant amount of filtered water at a constant amount of 112.5 kg / h and supplying activated carbon at a constant amount of 12.5 kg / h. Example 14 is an example in which only the upper blade is provided at a position 13 mm downward from the lower end of the upper communication hole, and Example 15 is only the lower blade at a position 30 mm upward from the bottom communication hole of the bottomless cylindrical body. Is an example.
（比較例１〜１６）
攪拌数ｎ１を７００〜１１００ｒｐｍとし、無底筒体の上部連通孔の上端から活性炭スラリー形成部の水面までの距離Δｈが７３〜１１３ｍｍと長くなるようにろ過水を張って活性炭を循環させた以外は、上記実施例１と同様にして活性炭スラリーを製造した。
その結果、活性炭が練り込まれた餅状の浮遊物が上部に滞留する状態となり、活性炭のスラリー化が阻害された。
(Comparative Examples 1-16)
Stirring number n 1 and 700 to 1100 r pm, the distance Δh from the upper end of the upper communication hole of a bottomless cylindrical body to the water surface of the activated carbon slurry formation section is stretched filtered water so long as 73~113mm circulating activated carbon An activated carbon slurry was produced in the same manner as in Example 1 except for the above.
As a result, the cage-like suspended matter in which the activated carbon was kneaded was retained in the upper part, and the slurry of the activated carbon was inhibited.
（比較例１８）
攪拌数ｎ１を１１００ｒｐｍとし、無底筒体の上部連通孔の上端から活性炭スラリー形成部の水面までの距離Δｈが９３ｍｍと長くなるようにろ過水を張って活性炭を循環させた以外は、上記実施例１と同様にして活性炭スラリーを製造した。
活性炭を投入する際、渦巻流に巻き込まれた空気は底部連通孔を通過して水面に浮き上がっている状態（いわゆるエア抜けの状態）であり、渦巻流のボルテックス角度は２０°であった。空気が巻き込まれた結果、水面上にマット状の浮遊物を生じ、均一な活性炭スラリーは得られなかった。
(Comparative Example 18)
Except that the stirring number n 1 was set to 1100 r pm and the activated carbon was circulated by adding filtered water so that the distance Δh from the upper end of the upper communication hole of the bottomless cylindrical body to the water surface of the activated carbon slurry forming portion was as long as 93 mm. An activated carbon slurry was produced in the same manner as in Example 1 above.
When the activated carbon was introduced, the air entrained in the spiral flow passed through the bottom communication hole and floated on the water surface (so-called air release state), and the vortex angle of the spiral flow was 20 °. As a result of the entrainment of air, a mat-like suspended matter was generated on the water surface, and a uniform activated carbon slurry could not be obtained.
（実施例１６〜１８）
活性炭スラリー形成部（直径４８０ｍｍ、直胴長５５０ｍｍ）、無底筒体（直径１６０ｍｍ、長さ６００ｍｍ）、及び攪拌翼を備えた図１に示す活性炭スラリー製造装置を用いて活性炭スラリーを製造した。攪拌翼は無底筒体の内部に同芯状に配置し、無底筒体に活性炭スラリー形成部と通じる上部連通孔（活性炭スラリー形成部の底部から上部連通孔の上端までの距離ｈ０：４００ｍｍ）及び底部連通孔（活性炭スラリー形成部の底部から底部連通孔までの距離ｈ１：４０ｍｍ）を設けた。さらに、攪拌翼として、上部連通孔の下端から下方向へ５３ｍｍの位置に上翼、及び無底筒体の底部連通孔から上方向へ８０ｍｍの位置に下翼を配置した。そして、無底筒体の上部連通孔の上端から活性炭スラリー形成部の水面までの距離Δｈが５０ｍｍとなるようにろ過水を張り、上翼及び下翼により無底筒体の内部に渦巻流を形成させ、巻き込まれた空気が底部連通孔を通過して水面に浮きあがる状態となる直前に、粉末活性炭（商品名：太閤Ｗ、二村化学株式会社製）５０ｋｇ／ｈを投入し、攪拌数ｎ１を６４２、７２９及び５８３ｒｐｍとして、上部連通孔及び底部連通孔を通じて活性炭を循環させた。このときの渦巻流のボルテックス角度は３５．４〜４５．８°であった。１０分後、濃度が１０重量％の均一な活性炭スラリーが得られた。その後、ろ過水を４５０ｋｇ／ｈの一定量で供給し、活性炭を５０ｋｇ／ｈの一定量で供給することにより、連続的に濃度が１０重量％の活性炭スラリーが得られた。
(Examples 16 to 18)
Activated carbon slurry formation section (diameter 480 mm, a straight body length 550 mm), a bottomless cylindrical body (diameter 160 mm, 600 mm length), and to produce an activated carbon slurry using activated carbon slurry manufacturing apparatus shown in FIG. 1 with a stirring blade. The stirring blades are arranged concentrically inside the bottomless cylinder, and the upper communication hole (the distance h 0 from the bottom of the activated carbon slurry formation part to the upper end of the upper communication hole) communicates with the activated carbon slurry formation part in the bottomless cylinder. 400 mm) and a bottom communication hole (distance h 1 from the bottom of the activated carbon slurry forming part to the bottom communication hole: 40 mm). Further, as the stirring blade, an upper blade was disposed at a position 53 mm downward from the lower end of the upper communication hole, and a lower blade was disposed at a position 80 mm upward from the bottom communication hole of the bottomless cylindrical body. Then, filtered water is applied so that the distance Δh from the upper end of the upper communication hole of the bottomless cylindrical body to the water surface of the activated carbon slurry forming portion is 50 mm, and a spiral flow is generated inside the bottomless cylindrical body by the upper wing and the lower wing. Immediately before the formed and entrained air passes through the bottom communication hole and floats on the water surface, 50 kg / h of powdered activated carbon (trade name: Dazai W, manufactured by Nimura Chemical Co., Ltd.) is added and the number of stirring is n The activated carbon was circulated through the top communication hole and the bottom communication hole with 1 being 642,729 and 583 r pm. The vortex angle of the spiral flow at this time was 35.4 to 45.8 °. After 10 minutes, a uniform activated carbon slurry having a concentration of 10% by weight was obtained. Thereafter, filtered water was supplied at a constant amount of 450 kg / h, and activated carbon was supplied at a constant amount of 50 kg / h, whereby an activated carbon slurry having a concentration of 10% by weight was obtained continuously.
（実施例１９）
活性炭スラリー形成部（直径５４０ｍｍ、直胴長６５０ｍｍ）、無底筒体（直径１８０ｍｍ、長さ７００ｍｍ）、及び攪拌翼を備えた図１に示す活性炭スラリー製造装置を用いて活性炭スラリーを製造した。攪拌翼は無底筒体の内部に同芯状に配置し、無底筒体に活性炭スラリー形成部と通じる上部連通孔（活性炭スラリー形成部の底部から上部連通孔の上端までの距離ｈ０：４５０ｍｍ）及び底部連通孔（活性炭スラリー形成部の底部から底部連通孔までの距離ｈ１：６０ｍｍ）を設けた。さらに、攪拌翼として、上部連通孔の下端から下方向へ６０ｍｍの位置に上翼、及び無底筒体の底部連通孔から上方向へ９０ｍｍの位置に下翼を配置した。そして、無底筒体の上部連通孔の上端から活性炭スラリー形成部の水面までの距離Δｈが９０ｍｍとなるようにろ過水を張り、上翼及び下翼により無底筒体の内部に渦巻流を形成させ、巻き込まれた空気が底部連通孔を通過して水面に浮きあがる状態となる直前に、粉末活性炭（商品名：太閤Ｗ、二村化学株式会社製）６４ｋｇ／ｈを投入し、攪拌数ｎ１を４９５ｒｐｍとして、上部連通孔及び底部連通孔を通じて活性炭を循環させた。このときの渦巻流のボルテックス角度は３９．９°であった。１２分後、濃度が１０重量％の均一な活性炭スラリーが得られた。その後、ろ過水を５７６ｋｇ／ｈの一定量で供給し、活性炭を６４ｋｇ／ｈの一定量で供給することにより、連続的に濃度が１０重量％の活性炭スラリーが得られた。
(Example 19)
Activated carbon slurry formation section (diameter 540 mm, a straight body length 650 mm), a bottomless cylindrical body (diameter 180 mm, length 700 mm), and was produced activated carbon slurried with activated carbon slurry manufacturing apparatus shown in FIG. 1 with a stirring blade. The stirring blades are arranged concentrically inside the bottomless cylinder, and the upper communication hole (the distance h 0 from the bottom of the activated carbon slurry formation part to the upper end of the upper communication hole) communicates with the activated carbon slurry formation part in the bottomless cylinder. 450 mm) and a bottom communication hole (distance h 1 from the bottom of the activated carbon slurry forming part to the bottom communication hole: 60 mm). Further, as the stirring blade, an upper blade was disposed at a position 60 mm downward from the lower end of the upper communication hole, and a lower blade was disposed at a position 90 mm upward from the bottom communication hole of the bottomless cylindrical body. Then, filtered water is applied so that the distance Δh from the upper end of the upper communication hole of the bottomless cylindrical body to the water surface of the activated carbon slurry forming portion is 90 mm, and a spiral flow is generated inside the bottomless cylindrical body by the upper wing and the lower wing. Immediately before the formed and entrained air passes through the bottom communication hole and floats on the water surface, 64 kg / h of powdered activated carbon (trade name: Dazai W, manufactured by Nimura Chemical Co., Ltd.) is added, and the number of stirring is n Activated carbon was circulated through the top communication hole and the bottom communication hole with 1 being 495 r pm. The vortex angle of the spiral flow at this time was 39.9 °. After 12 minutes, a uniform activated carbon slurry having a concentration of 10% by weight was obtained. Thereafter, filtered water was supplied at a constant amount of 576 kg / h, and activated carbon was supplied at a constant amount of 64 kg / h, whereby an activated carbon slurry having a concentration of 10% by weight was obtained continuously.
（実施例２０）
活性炭スラリー形成部（直径９００ｍｍ、直胴長１０８０ｍｍ）、無底筒体（直径３００ｍｍ、長さ１１３０ｍｍ）、及び攪拌翼を備えた図１に示す活性炭スラリー製造装置を用いて活性炭スラリーを製造した。攪拌翼は無底筒体の内部に同芯状に配置し、無底筒体に活性炭スラリー形成部と通じる上部連通孔（活性炭スラリー形成部の底部から上部連通孔の上端までの距離ｈ０：７５０ｍｍ）及び底部連通孔（活性炭スラリー形成部の底部から底部連通孔までの距離ｈ１：１００ｍｍ）を設けた。さらに、攪拌翼として、上部連通孔の下端から下方向へ１００ｍｍの位置に上翼、及び無底筒体の底部連通孔から上方向へ１５０ｍｍの位置に下翼を配置した。そして、無底筒体の上部連通孔の上端から活性炭スラリー形成部の水面までの距離Δｈが１５０ｍｍとなるようにろ過水を張り、上翼及び下翼により無底筒体の内部に渦巻流を形成させ、巻き込まれた空気が底部連通孔を通過して水面に浮きあがる状態となる直前に、粉末活性炭（商品名：太閤Ｗ、二村化学株式会社製）１８０ｋｇ／ｈを投入し、攪拌数ｎ１を３４０ｒｐｍとして、上部連通孔及び底部連通孔を通じて活性炭を循環させた。このときの渦巻流のボルテックス角度は４２．９°であった。１９分後、濃度が１０重量％の均一な活性炭スラリーが得られた。その後、ろ過水を１６２０ｋｇ／ｈの一定量で供給し、活性炭を１８０ｋｇ／ｈの一定量で供給することにより、連続的に濃度が１０重量％の活性炭スラリーが得られた。
(Example 20)
Activated carbon slurry formation section (diameter 900 mm, a straight body length 1080 mm), a bottomless cylindrical body (diameter 300 mm, length 1130 mm), and was produced activated carbon slurried with activated carbon slurry manufacturing apparatus shown in FIG. 1 with a stirring blade. The stirring blades are arranged concentrically inside the bottomless cylinder, and the upper communication hole (the distance h 0 from the bottom of the activated carbon slurry formation part to the upper end of the upper communication hole) communicates with the activated carbon slurry formation part in the bottomless cylinder. 750 mm) and a bottom communication hole (distance h 1 : 100 mm from the bottom of the activated carbon slurry forming part to the bottom communication hole). Further, as the stirring blade, an upper blade was disposed at a position 100 mm downward from the lower end of the upper communication hole, and a lower blade was disposed at a position 150 mm upward from the bottom communication hole of the bottomless cylindrical body. Then, filtered water is applied so that the distance Δh from the upper end of the upper communication hole of the bottomless cylindrical body to the water surface of the activated carbon slurry forming portion is 150 mm, and a spiral flow is generated inside the bottomless cylindrical body by the upper blade and the lower blade. Immediately before the formed and entrained air passes through the bottom communication hole and floats on the water surface, 180 kg / h of powdered activated carbon (trade name: Dazai W, manufactured by Nimura Chemical Co., Ltd.) is added and the number of stirring is n Activated carbon was circulated through the upper communication hole and the bottom communication hole with 1 being 340 r pm. The vortex angle of the spiral flow at this time was 42.9 °. After 19 minutes, a uniform activated carbon slurry having a concentration of 10% by weight was obtained. Thereafter, filtered water was supplied at a constant amount of 1620 kg / h, and activated carbon was supplied at a constant amount of 180 kg / h, whereby an activated carbon slurry having a concentration of 10% by weight was obtained continuously.
（実施例２１）
活性炭スラリー形成部（直径１８００ｍｍ、直胴長２１６０ｍｍ）、無底筒体（直径６００ｍｍ、長さ２２１０ｍｍ）、及び攪拌翼を備えた図１に示す活性炭スラリー製造装置を用いて活性炭スラリーを製造した。攪拌翼は無底筒体の内部に同芯状に配置し、無底筒体に活性炭スラリー形成部と通じる上部連通孔（活性炭スラリー形成部の底部から上部連通孔の上端までの距離ｈ０：１５００ｍｍ）及び底部連通孔（活性炭スラリー形成部の底部から底部連通孔までの距離ｈ１：２００ｍｍ）を設けた。さらに、攪拌翼として、上部連通孔の下端から下方向へ２００ｍｍの位置に上翼、及び無底筒体の底部連通孔から上方向へ３００ｍｍの位置に下翼を配置した。そして、無底筒体の上部連通孔の上端から活性炭スラリー形成部の水面までの距離Δｈが２１０ｍｍとなるようにろ過水を張り、上翼及び下翼により無底筒体の内部に渦巻流を形成させ、巻き込まれた空気が底部連通孔を通過して水面に浮きあがる状態となる直前に、粉末活性炭（商品名：太閤Ｗ、二村化学株式会社製）７１０ｋｇ／ｈを投入し、攪拌数ｎ１を２００ｒｐｍとして、上部連通孔及び底部連通孔を通じて活性炭を循環させた。このときの渦巻流のボルテックス角度は４９．７°であった。３７分後、濃度が１０重量％の均一な活性炭スラリーが得られた。その後、ろ過水を６３９０ｋｇ／ｈの一定量で供給し、活性炭を７１０ｋｇ／ｈの一定量で供給することにより、連続的に濃度が１０重量％の活性炭スラリーが得られた。
(Example 21)
Activated carbon slurry formation section (diameter 1800 mm, a straight body length 2160 mm), a bottomless cylindrical body (diameter 600 mm, length 2210mm), and to produce an activated carbon slurry using activated carbon slurry manufacturing apparatus shown in FIG. 1 with a stirring blade. The stirring blades are arranged concentrically inside the bottomless cylinder, and the upper communication hole (the distance h 0 from the bottom of the activated carbon slurry formation part to the upper end of the upper communication hole) communicates with the activated carbon slurry formation part in the bottomless cylinder. 1500 mm) and a bottom communication hole (distance h 1 from the bottom of the activated carbon slurry forming part to the bottom communication hole: 200 mm). Further, as the stirring blade, an upper blade was disposed at a position 200 mm downward from the lower end of the upper communication hole, and a lower blade was disposed at a position 300 mm upward from the bottom communication hole of the bottomless cylindrical body. Then, filtered water is applied so that the distance Δh from the upper end of the upper communication hole of the bottomless cylindrical body to the water surface of the activated carbon slurry forming portion is 210 mm, and a spiral flow is generated inside the bottomless cylindrical body by the upper blade and the lower blade. Immediately before the formed and entrained air passes through the bottom communication hole and floats on the water surface, 710 kg / h of powdered activated carbon (trade name: Dazai W, manufactured by Nimura Chemical Co., Ltd.) is added and the number of stirring is n 1 as 200 r pm, it was circulated activated carbon through the upper communication hole and bottom communication hole. The vortex angle of the spiral flow at this time was 49.7 °. After 37 minutes, a uniform activated carbon slurry having a concentration of 10% by weight was obtained. Thereafter, filtered water was supplied at a constant amount of 6390 kg / h, and activated carbon was supplied at a constant amount of 710 kg / h, whereby an activated carbon slurry having a concentration of 10% by weight was obtained continuously.