JP5750607B2 - Papermaking process water sterilizer - Google Patents
Papermaking process water sterilizer Download PDFInfo
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- JP5750607B2 JP5750607B2 JP2013134975A JP2013134975A JP5750607B2 JP 5750607 B2 JP5750607 B2 JP 5750607B2 JP 2013134975 A JP2013134975 A JP 2013134975A JP 2013134975 A JP2013134975 A JP 2013134975A JP 5750607 B2 JP5750607 B2 JP 5750607B2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 220
- 238000000034 method Methods 0.000 title claims description 62
- 230000008569 process Effects 0.000 title claims description 60
- 239000012895 dilution Substances 0.000 claims description 116
- 238000010790 dilution Methods 0.000 claims description 116
- 150000001875 compounds Chemical class 0.000 claims description 83
- 239000000243 solution Substances 0.000 claims description 68
- 239000003814 drug Substances 0.000 claims description 49
- 230000001954 sterilising effect Effects 0.000 claims description 46
- 238000002347 injection Methods 0.000 claims description 45
- 239000007924 injection Substances 0.000 claims description 45
- 239000002253 acid Substances 0.000 claims description 43
- 229940079593 drug Drugs 0.000 claims description 42
- 238000004659 sterilization and disinfection Methods 0.000 claims description 21
- 238000011144 upstream manufacturing Methods 0.000 claims description 21
- 229910052736 halogen Inorganic materials 0.000 claims description 8
- 150000002367 halogens Chemical class 0.000 claims description 8
- 150000003863 ammonium salts Chemical class 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 claims description 6
- XOAAWQZATWQOTB-UHFFFAOYSA-N taurine Chemical compound NCCS(O)(=O)=O XOAAWQZATWQOTB-UHFFFAOYSA-N 0.000 claims description 6
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 4
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 claims description 3
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 claims description 3
- 239000004471 Glycine Substances 0.000 claims description 3
- WHUUTDBJXJRKMK-VKHMYHEASA-N L-glutamic acid Chemical compound OC(=O)[C@@H](N)CCC(O)=O WHUUTDBJXJRKMK-VKHMYHEASA-N 0.000 claims description 3
- KDXKERNSBIXSRK-YFKPBYRVSA-N L-lysine Chemical compound NCCCC[C@H](N)C(O)=O KDXKERNSBIXSRK-YFKPBYRVSA-N 0.000 claims description 3
- AYFVYJQAPQTCCC-GBXIJSLDSA-N L-threonine Chemical compound C[C@@H](O)[C@H](N)C(O)=O AYFVYJQAPQTCCC-GBXIJSLDSA-N 0.000 claims description 3
- KDXKERNSBIXSRK-UHFFFAOYSA-N Lysine Natural products NCCCCC(N)C(O)=O KDXKERNSBIXSRK-UHFFFAOYSA-N 0.000 claims description 3
- 239000004472 Lysine Substances 0.000 claims description 3
- AYFVYJQAPQTCCC-UHFFFAOYSA-N Threonine Natural products CC(O)C(N)C(O)=O AYFVYJQAPQTCCC-UHFFFAOYSA-N 0.000 claims description 3
- 239000004473 Threonine Substances 0.000 claims description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 3
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- 239000004202 carbamide Substances 0.000 claims description 3
- 235000013922 glutamic acid Nutrition 0.000 claims description 3
- 239000004220 glutamic acid Substances 0.000 claims description 3
- 150000001469 hydantoins Chemical class 0.000 claims description 3
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 claims description 3
- SATVIFGJTRRDQU-UHFFFAOYSA-N potassium hypochlorite Chemical compound [K+].Cl[O-] SATVIFGJTRRDQU-UHFFFAOYSA-N 0.000 claims description 3
- ORQYPOUSZINNCB-UHFFFAOYSA-N potassium;hypobromite Chemical compound [K+].Br[O-] ORQYPOUSZINNCB-UHFFFAOYSA-N 0.000 claims description 3
- CRWJEUDFKNYSBX-UHFFFAOYSA-N sodium;hypobromite Chemical compound [Na+].Br[O-] CRWJEUDFKNYSBX-UHFFFAOYSA-N 0.000 claims description 3
- 229960003080 taurine Drugs 0.000 claims description 3
- 229940126062 Compound A Drugs 0.000 claims 1
- NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 claims 1
- QDHHCQZDFGDHMP-UHFFFAOYSA-N Chloramine Chemical class ClN QDHHCQZDFGDHMP-UHFFFAOYSA-N 0.000 description 21
- 239000007788 liquid Substances 0.000 description 15
- 230000010349 pulsation Effects 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 12
- 239000007864 aqueous solution Substances 0.000 description 10
- 238000001139 pH measurement Methods 0.000 description 8
- 238000012546 transfer Methods 0.000 description 8
- 230000000844 anti-bacterial effect Effects 0.000 description 7
- 239000000975 dye Substances 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 238000003756 stirring Methods 0.000 description 7
- 239000007795 chemical reaction product Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 244000005700 microbiome Species 0.000 description 6
- JSYGRUBHOCKMGQ-UHFFFAOYSA-N dichloramine Chemical compound ClNCl JSYGRUBHOCKMGQ-UHFFFAOYSA-N 0.000 description 5
- 238000007865 diluting Methods 0.000 description 5
- 230000002411 adverse Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- QEHKBHWEUPXBCW-UHFFFAOYSA-N nitrogen trichloride Chemical compound ClN(Cl)Cl QEHKBHWEUPXBCW-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 3
- 239000008235 industrial water Substances 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 239000012266 salt solution Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- GEHMBYLTCISYNY-UHFFFAOYSA-N Ammonium sulfamate Chemical compound [NH4+].NS([O-])(=O)=O GEHMBYLTCISYNY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- JJKVMNNUINFIRK-UHFFFAOYSA-N 4-amino-n-(4-methoxyphenyl)benzamide Chemical compound C1=CC(OC)=CC=C1NC(=O)C1=CC=C(N)C=C1 JJKVMNNUINFIRK-UHFFFAOYSA-N 0.000 description 1
- YIROYDNZEPTFOL-UHFFFAOYSA-N 5,5-Dimethylhydantoin Chemical compound CC1(C)NC(=O)NC1=O YIROYDNZEPTFOL-UHFFFAOYSA-N 0.000 description 1
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 241000792805 Parupeneus multifasciatus Species 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical compound [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 1
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- RSIPQRDGPVEGLE-UHFFFAOYSA-L calcium;disulfamate Chemical compound [Ca+2].NS([O-])(=O)=O.NS([O-])(=O)=O RSIPQRDGPVEGLE-UHFFFAOYSA-L 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910000388 diammonium phosphate Inorganic materials 0.000 description 1
- 235000019838 diammonium phosphate Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 229940091173 hydantoin Drugs 0.000 description 1
- -1 hydantoin compound Chemical class 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- SAPIQCCFEBULSH-UHFFFAOYSA-M lithium;sulfamate Chemical compound [Li+].NS([O-])(=O)=O SAPIQCCFEBULSH-UHFFFAOYSA-M 0.000 description 1
- YZVJHCGMTYDKFR-UHFFFAOYSA-L magnesium;disulfamate Chemical compound [Mg+2].NS([O-])(=O)=O.NS([O-])(=O)=O YZVJHCGMTYDKFR-UHFFFAOYSA-L 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000019837 monoammonium phosphate Nutrition 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- BTAAXEFROUUDIL-UHFFFAOYSA-M potassium;sulfamate Chemical compound [K+].NS([O-])(=O)=O BTAAXEFROUUDIL-UHFFFAOYSA-M 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009131 signaling function Effects 0.000 description 1
- QDWYPRSFEZRKDK-UHFFFAOYSA-M sodium;sulfamate Chemical compound [Na+].NS([O-])(=O)=O QDWYPRSFEZRKDK-UHFFFAOYSA-M 0.000 description 1
- 241000894007 species Species 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-M sulfamate Chemical compound NS([O-])(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-M 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- Treatment Of Water By Oxidation Or Reduction (AREA)
Description
本発明は、製紙工程水の殺菌装置に関する。さらに詳しくは、本発明は、抄紙工程水などの製紙工程水を殺菌するために結合ハロゲン発生化合物を使用する場合に、製紙工程水の殺菌効果および紙製品の白色度を向上させる目的で添加されている染料への影響のばらつきを抑制することのできる殺菌装置に関する。 The present invention relates to a sterilization apparatus for papermaking process water. More specifically, the present invention is added for the purpose of improving the bactericidal effect of papermaking process water and the whiteness of paper products when a bound halogen generating compound is used to sterilize papermaking process water such as papermaking process water. The present invention relates to a sterilization apparatus that can suppress variation in the influence on the dyes that are present.
紙パルプ製造工程では、原料となる木材に由来するセルロース、リグニン、ヘミセルロース、糖類などを栄養源として多くの微生物が製紙工程水中に繁殖する。これらの微生物が製紙工程中のパイプラインやピットなどの壁面に付着してスライムを形成し、スライムが原因となって紙切れによる生産効率の低下が生じたり、あるいは、紙製品の品質低下がもたらされることは、従来からよく知られている。これらの障害を防ぐために、種々の有機系殺菌剤が使用されているが、経済性や環境影響性の点からその使用量が制限される。そこで、酸化剤を用いた工業用水系の殺菌方法が種々提案されている。 In the pulp and paper manufacturing process, many microorganisms are propagated in the papermaking process water by using cellulose, lignin, hemicellulose, saccharides and the like derived from wood as a raw material as nutrient sources. These microorganisms adhere to the walls of pipelines and pits during the paper making process to form slime, resulting in a decrease in production efficiency due to running out of paper due to slime, or a decrease in paper product quality. This is well known from the past. In order to prevent these obstacles, various organic fungicides are used, but the amount of use is limited from the viewpoint of economic efficiency and environmental impact. Therefore, various industrial water-based sterilization methods using an oxidizing agent have been proposed.
特許文献１には、水と次亜塩素酸溶液とを第１のミキサーにて混合した酸化剤水溶液を第３のミキサーへ送り、かつ水とアンモニウム塩溶液とを第２のミキサーにて混合したアミン源水溶液を第３のミキサーへ送り、第３のミキサーにて酸化剤水溶液とアミン源水溶液とを混合して反応させ、その反応生成物であるバイオフィルム阻害物質を水中の微生物集合体へ添加して殺菌する工業用水系の殺菌装置が開示されている。このとき、次亜塩素酸溶液の第１のミキサーへの移送およびアンモニウム塩溶液の第２のミキサーへの移送は脈動ポンプを用いて行われる。 In Patent Document 1, an aqueous oxidizer solution in which water and a hypochlorous acid solution are mixed in a first mixer is sent to a third mixer, and water and an ammonium salt solution are mixed in a second mixer. The amine source aqueous solution is sent to the third mixer, the oxidant aqueous solution and the amine source aqueous solution are mixed and reacted in the third mixer, and the biofilm inhibitory substance, which is the reaction product, is added to the microbial aggregate in the water. An industrial water-based sterilization apparatus for sterilization is disclosed. At this time, the transfer of the hypochlorous acid solution to the first mixer and the transfer of the ammonium salt solution to the second mixer are performed using a pulsation pump.
また、特許文献２には、製紙工程水ライン（白水ライン）と接続された希釈水ラインを流れる水中に次亜塩素酸溶液とアンモニウム塩溶液とを添加してこれらを反応させ、その反応生成物である殺菌成分を含む水溶液を製紙工程水ラインへ導入して、製紙工程水中の微生物を殺菌する製紙工程水の殺菌方法が開示されている。 Further, in Patent Document 2, a hypochlorous acid solution and an ammonium salt solution are added to water flowing through a dilution water line connected to a papermaking process water line (white water line) to react them, and the reaction product An aqueous solution containing a sterilizing component is introduced into a papermaking process water line to sterilize microorganisms in the papermaking process water.
本発明者らは、特許文献２に記載の製紙工程水の殺菌方法を実施するために次の殺菌装置を製作した。
この殺菌装置は、水源と接続された上流側端部および製紙工程水ラインと接続された下流側端部を有する希釈水ラインと、次亜ハロゲン酸化合物を含む第１溶液を貯蔵する第１タンクと、次亜ハロゲン酸化合物と反応することにより結合ハロゲンを生成する化合物である結合ハロゲン生成化合物を含む第２溶液を貯蔵する第２タンクと、前記第１タンクと前記希釈水ラインとを接続する第１接続パイプと、前記第１接続パイプよりも下流側で前記第２タンクと前記希釈水ラインとを接続する第２接続パイプと、前記第１接続パイプの途中部に設けられた第１脈動ポンプと、前記第２接続パイプの途中部に設けられた第２脈動ポンプとを備える。また、希釈水ラインにおける第１接続ポイントと第２接続ポイントとの間位置、および希釈水ラインにおける第２接続パイプの下流位置に、水流によって回転するミキサーとしての撹拌羽根が設けられている。なお、第１および第２脈動ポンプとしてはダイヤフラムポンプを用いた。
The present inventors manufactured the following sterilization apparatus in order to carry out the paper manufacturing process water sterilization method described in Patent Document 2.
The sterilizer includes a dilution water line having an upstream end connected to a water source and a downstream end connected to a papermaking process water line, and a first tank for storing a first solution containing a hypohalous acid compound. And a second tank for storing a second solution containing a bonded halogen-generating compound that is a compound that generates a bonded halogen by reacting with a hypohalous acid compound, and the first tank and the dilution water line are connected to each other. A first connection pipe, a second connection pipe that connects the second tank and the dilution water line downstream of the first connection pipe, and a first pulsation provided in the middle of the first connection pipe A pump and a second pulsation pump provided in the middle of the second connection pipe. In addition, stirring blades as a mixer that is rotated by a water flow are provided at a position between the first connection point and the second connection point in the dilution water line and at a downstream position of the second connection pipe in the dilution water line. In addition, a diaphragm pump was used as the first and second pulsation pumps.
この殺菌装置によれば、希釈水ラインにおける第１接続ポイントに第１溶液（次亜ハロゲン酸化合物）が導入され、第１接続ポイントと第２接続ポイントとの間位置の撹拌羽根によって第１溶液が水に均一に撹拌混合されて第２接続ポイントへ送られる。その後、第２接続ポイントに第２溶液（結合ハロゲン生成化合物）が導入され、第２接続ポイントの下流側の撹拌羽根によって次亜ハロゲン酸化合物と結合ハロゲン生成化合物とが撹拌混合され反応して殺菌剤としての反応生成物が生成され、この反応生成物が製紙工程水中に混合し、製紙工程水中の微生物を殺菌する。この反応生成物としては、例えば、モノクロラミン、ジクロラミンおよびトリクロラミンといった殺菌成分を含むクロラミン類である。 According to this sterilizer, the first solution (hypohalous acid compound) is introduced to the first connection point in the dilution water line, and the first solution is stirred by the stirring blade located between the first connection point and the second connection point. Is uniformly stirred and mixed with water and sent to the second connection point. Thereafter, the second solution (bonded halogen-generating compound) is introduced into the second connection point, and the hypohalous acid compound and the combined halogen-generating compound are stirred and mixed by a stirring blade downstream of the second connection point, and sterilized by reaction. A reaction product as an agent is generated, and this reaction product is mixed in the papermaking process water to sterilize microorganisms in the papermaking process water. Examples of the reaction product include chloramines containing bactericidal components such as monochloramine, dichloramine, and trichloramine.
しかしながら、この殺菌装置の場合、希釈水ラインの２箇所に撹拌羽根が設けられているにもかかわらず、製紙工程水ラインと接続する希釈水ラインの最下流位置でのｐＨ値が小刻みに変動していることが発明者らの実験により明らかとなった。
次亜ハロゲン酸化合物と結合ハロゲン生成化合物との反応はｐＨの影響を受け易いため、ｐＨ値が変動、例えば８．０未満にすると生成される複数の殺菌成分の割合が変動し、その結果、製紙工程水の殺菌効果が安定しないという懸念や、ジクロラミンやトリクロラミンの割合が増え過ぎて製紙工程水に含まれる製紙用染料に悪影響を与えてしまう（退色させてしまう）という懸念がある。
However, in the case of this sterilizer, the pH value at the most downstream position of the dilution water line connected to the papermaking process water line fluctuates little by little, even though stirring blades are provided at two locations of the dilution water line. It became clear by experiments of the inventors.
Since the reaction between the hypohalous acid compound and the combined halogen-generating compound is easily affected by pH, the pH value fluctuates, for example, the proportion of a plurality of sterilizing components produced when the pH value is less than 8.0 fluctuates. There are concerns that the sterilizing effect of the papermaking process water is not stable, and there is a concern that the ratio of dichloramine and trichloramine increases so much that it adversely affects (discolors) the papermaking dye contained in the papermaking process water.
本発明は、前記課題に鑑みてなされたものであり、製紙工程水の殺菌効果を安定化し、さらには、製紙工程水に含まれる製紙用染料への悪影響を抑制することができる製紙工程水の殺菌装置を提供することを目的とする。 The present invention has been made in view of the above problems, and stabilizes the sterilizing effect of papermaking process water. Furthermore, the papermaking process water can suppress adverse effects on papermaking dyes contained in the papermaking process water. It aims at providing a sterilizer.
かくして、本発明によれば、水源からの希釈水を製紙工程水ラインに導入する希釈水ラインと、次亜ハロゲン酸化合物を含む第１溶液を貯蔵する第１タンクと、次亜ハロゲン酸化合物と反応することにより結合ハロゲンを生成する化合物である結合ハロゲン生成化合物を含む第２溶液を貯蔵する第２タンクと、前記第１タンク内の第１溶液を前記希釈水ライン内の希釈水中に注入する第１薬剤注入部と、前記第２タンク内の第２溶液を前記希釈水ライン内の希釈水中に注入する第２薬剤注入部とを備え、
前記希釈水ラインの最下流における前記第１溶液と第２溶液とが混合した希釈水のｐＨ値の単位時間当たりの変動が所定値以内となるように構成された製紙工程水の殺菌装置が提供される。
Thus, according to the present invention, a dilution water line for introducing dilution water from a water source into the papermaking process water line , a first tank for storing a first solution containing a hypohalous acid compound, a hypohalous acid compound, A second tank that stores a second solution containing a bonded halogen-generating compound that is a compound that generates a bonded halogen by reacting, and the first solution in the first tank is injected into the diluted water in the diluted water line. A first drug injection part; and a second drug injection part for injecting the second solution in the second tank into the dilution water in the dilution water line,
Provided is a paper-making process water sterilizer configured such that a fluctuation per unit time of a pH value of dilution water in which the first solution and the second solution are mixed in the most downstream of the dilution water line is within a predetermined value. Is done.
本発明の製紙工程水の殺菌装置によれば、希釈水ラインの最下流における第１溶液と第２溶液とが混合した希釈水のｐＨ値の単位時間当たりの変動が所定値以内に抑えられるため、ｐＨ値が安定する。その結果、次亜ハロゲン酸化合物と結合ハロゲン生成化合物との反応が安定し、生成される１種以上の殺菌成分の割合も安定するため、製紙工程水の所望の殺菌効果を維持することができる。さらに、生成される１種以上の殺菌成分の割合が安定することで、製紙工程水に含まれる製紙用染料への悪影響を持続的に最小限に抑制することが可能となる。
本発明は、特に、次亜ハロゲン酸化合物と、結合ハロゲン生成化合物とを反応させて殺菌成分としてクロラミン類を生成する場合に好適である。
According to the paper manufacturing process water sterilization apparatus of the present invention, the fluctuation per unit time of the pH value of the dilution water in which the first solution and the second solution are mixed in the most downstream of the dilution water line is suppressed within a predetermined value. The pH value is stable. As a result, the reaction between the hypohalous acid compound and the combined halogen-generating compound is stabilized, and the proportion of one or more sterilizing components produced is also stable, so that the desired sterilizing effect of the papermaking process water can be maintained. . Furthermore, since the ratio of the one or more sterilizing components produced is stabilized, it is possible to continuously suppress the adverse effects on the papermaking dye contained in the papermaking process water to a minimum.
The present invention is particularly suitable for the case where chloroamines are produced as a bactericidal component by reacting a hypohalous acid compound and a combined halogen-generating compound.
本発明の製紙工程水の殺菌装置は、水源からの希釈水を製紙工程水ラインを導入する希釈水ラインと、次亜ハロゲン酸化合物を含む第１溶液を貯蔵する第１タンクと、次亜ハロゲン酸化合物と反応することにより結合ハロゲンを生成する化合物である結合ハロゲン生成化合物を含む第２溶液を貯蔵する第２タンクと、前記第１タンク内の第１溶液を前記希釈水ライン内の希釈水中に注入する第１薬剤注入部と、前記第２タンク内の第２溶液を前記希釈水ライン内の希釈水中に注入する第２薬剤注入部とを備え、
前記希釈水ラインの最下流における前記第１溶液と第２溶液とが混合した希釈水のｐＨ値の単位時間当たりのｐＨの変動が所定値以内となるように構成されている。
The paper production process water sterilization apparatus of the present invention includes a dilution water line for introducing dilution water from a water source into a paper production process water line, a first tank for storing a first solution containing a hypohalous acid compound, and a hypohalous acid. A second tank for storing a second solution containing a bonded halogen-generating compound that is a compound that generates a bonded halogen by reacting with an acid compound; and the first solution in the first tank is diluted with diluted water in the dilution water line. A first drug injecting unit for injecting the second solution into the diluted water in the dilution water line, and a second drug injecting unit for injecting the second solution in the second tank into the diluted water line,
A change in pH per unit time of the pH value of the dilution water in which the first solution and the second solution are mixed in the most downstream of the dilution water line is configured to be within a predetermined value.
本発明の製紙工程水の殺菌装置は、希釈水ラインの最下流における第１溶液と第２溶液とが混合した希釈水のｐＨ値の単位時間当たりの変動を所定値以内に抑えることができるものであり、その構成は特に限定されるものではない。
本発明の殺菌装置は、次のように構成されてもよく、それらが適宜組み合わされてもよい。
The sterilization apparatus for papermaking process water according to the present invention can suppress the fluctuation per unit time of the pH value of the dilution water in which the first solution and the second solution are mixed at the most downstream of the dilution water line within a predetermined value. The configuration is not particularly limited.
The sterilization apparatus of the present invention may be configured as follows, or may be appropriately combined.
（１）前記第１薬剤注入部の前記希釈水ラインとの第１接続ポイントの下流位置または前記第２薬剤注入部の前記希釈水ラインとの第２接続ポイントの下流位置、および前記希釈水ラインにおける前記第１接続ポイントと前記第２接続ポイントとの間位置に、ミキサーが設けられていてもよい。
つまり、本発明において、希釈水ラインの水中に添加する薬剤の順序は、結合ハロゲン生成化合物が次亜ハロゲン酸化合物よりも先に添加されてもよく後で添加されてもよい。要は、水中に結合ハロゲン生成化合物と次亜ハロゲン酸化合物を個別に添加した直後にそれぞれミキサーにて撹拌して各薬剤を水中に均一に分散させるようにする。
(1) A downstream position of a first connection point with the dilution water line of the first drug injection part or a downstream position of a second connection point with the dilution water line of the second drug injection part, and the dilution water line A mixer may be provided at a position between the first connection point and the second connection point.
That is, in the present invention, the order of the chemicals added to the water in the dilution water line may be such that the combined halogen-generating compound may be added before or after the hypohalous acid compound. In short, immediately after the combined halogen-generating compound and the hypohalous acid compound are individually added to the water, they are stirred with a mixer so that each drug is uniformly dispersed in the water.
このようにすれば、次亜ハロゲン酸化合物と結合ハロゲン生成化合物との反応性が高まる。
この構成では、第１および第２ポンプとして無脈動ポンプが好適である。ここで、「無脈動ポンプ」とは、移送する液体の粘度にもよるが、吐出圧の変動、すなわち脈動率が±５％以下で、一定流量で液体を移送可能なポンプであり、例えば、株式会社タクミナ製のスムースフローポンプ（登録商標）形式ＢＰＬ等が挙げられる。
In this way, the reactivity between the hypohalous acid compound and the combined halogen-generating compound is increased.
In this configuration, pulsating pumps are suitable as the first and second pumps. Here, the “pulsation-free pump” is a pump capable of transferring liquid at a constant flow rate with a fluctuation in discharge pressure, that is, a pulsation rate of ± 5% or less, depending on the viscosity of the liquid to be transferred. Examples include a smooth flow pump (registered trademark) type BPL manufactured by Takumina Co., Ltd.
（２）前記第１薬剤注入部の前記希釈水ラインとの第１接続ポイントが、前記第２薬剤注入部の前記希釈水ラインとの第２接続ポイントよりも上流側に配置されていてもよい。
このようにすれば、先に希釈水中に次亜ハロゲン酸化合物を添加し、その後で、アルカリ条件下の希釈水中に結合ハロゲン生成化合物を添加することができるため、アルカリ条件下で次亜ハロゲン酸化合物と結合ハロゲン生成化合物とが反応して殺菌成分としての反応生成物が生成される。
(2) The 1st connection point with the dilution water line of the 1st medicine injection part may be arranged upstream from the 2nd connection point with the dilution water line of the 2nd medicine injection part. .
In this way, the hypohalous acid compound can be added to the diluted water first, and then the combined halogen-generating compound can be added to the diluted water under alkaline conditions. The compound and the combined halogen-generating compound react to produce a reaction product as a bactericidal component.
例えば、次亜ハロゲン酸化合物が、次亜塩素酸ナトリウム、次亜塩素酸カルシウム、次亜塩素酸カリウム、次亜臭素酸ナトリウムおよび次亜臭素酸カリウムのうちから選択された１種または２種以上を含み、結合ハロゲン生成化合物が、水溶性の無機アンモニウム塩、アンモニア、スルファミン酸またはその塩、尿素、ヒダントイン化合物、グリシン、スレオニン、リジン、グルタミン酸およびタウリンのうちから選択された１種または２種以上を含む場合は、アルカリ条件下で次亜ハロゲン酸化合物と結合ハロゲン生成化合物とが反応して、殺菌成分としての例えばクロラミン類が生成するが、このとき、ジクロラミンおよびトリクロラミンよりもモノクロラミンが優先的に生成される。 For example, the hypohalous acid compound is one or more selected from sodium hypochlorite, calcium hypochlorite, potassium hypochlorite, sodium hypobromite and potassium hypobromite. And the bonded halogen-generating compound is one or more selected from water-soluble inorganic ammonium salts, ammonia, sulfamic acid or salts thereof, urea, hydantoin compounds, glycine, threonine, lysine, glutamic acid and taurine In this case, the hypohalous acid compound and the combined halogen-generating compound react with each other under alkaline conditions to produce, for example, chloramines as bactericidal components. At this time, monochloramine is preferred over dichloramine and trichloramine. Generated automatically.
殺菌成分剤としてのモノクロラミン等を製紙工程水中に添加することにより、製紙工程水中の微生物を殺菌することができることに加え、製紙工程水に含まれる製紙用染料に悪影響を与え難く（退色させ難く）することができる。 In addition to being able to sterilize microorganisms in the papermaking process water by adding monochloramine as a bactericidal component into the papermaking process water, it is difficult to adversely affect the papermaking dye contained in the papermaking process water (hard to discolor) )can do.
前記結合ハロゲン生成化合物において、水溶性の無機アンモニウム塩としては、塩化アンモニウム、臭化アンモニウム、リン酸アンモニウム、リン酸二水素アンモニウム、リン酸水素二アンモニウム、硝酸アンモニウム、硫酸アンモニウム、スルファミン酸アンモニウムなどが挙げられる。
前記結合ハロゲン生成化合物において、スルファミン酸塩としては、スルファミン酸ナトリウム、スルファミン酸カリウム、スルファミン酸リチウム、スルファミン酸カルシウム、スルファミン酸マグネシウム、スルファミン酸亜鉛、スルファミン酸アンモニウムなどの水溶性塩類が挙げられる。
前記結合ハロゲン生成化合物において、ヒダントイン化合物としては、５，５−ジメチルヒダントインなどが挙げられる。
なお、製紙工程において、染料に対する影響を考慮しなくてよいのであれば、ジクロラミンやトリクロラミンを含むクロラミン類を用いて製紙工程水の殺菌処理を行うことができる。この場合は、本発明において、希釈ラインに対する次亜ハロゲン酸化合物の注入位置が結合ハロゲン生成化合物の注入位置よりも下流側に配置されてもよい。
Examples of the water-soluble inorganic ammonium salt in the combined halogen-generating compound include ammonium chloride, ammonium bromide, ammonium phosphate, ammonium dihydrogen phosphate, diammonium hydrogen phosphate, ammonium nitrate, ammonium sulfate, and ammonium sulfamate. .
In the combined halogen-generating compound, examples of the sulfamate include water-soluble salts such as sodium sulfamate, potassium sulfamate, lithium sulfamate, calcium sulfamate, magnesium sulfamate, zinc sulfamate, and ammonium sulfamate.
In the combined halogen-generating compound, examples of the hydantoin compound include 5,5-dimethylhydantoin.
In addition, if it is not necessary to consider the influence with respect to a dye in a papermaking process, the sterilization process of papermaking process water can be performed using chloramines containing dichloramine and trichloramine. In this case, in the present invention, the injection position of the hypohalous acid compound with respect to the dilution line may be arranged downstream of the injection position of the combined halogen-generating compound.
（３）前記第１薬剤注入部は、前記第１タンクと前記希釈水ラインとを接続する第１接続ラインと、前記第１接続ラインに設けられた第１ポンプとを有し、
前記第２薬剤注入部は、前記第２タンクと前記希釈水ラインとを接続する第２接続ラインと、前記第２接続ラインに設けられた第２ポンプとを有し、
前記第１および第２ポンプが無脈動ポンプであってもよい。
(3) The first drug injecting unit includes a first connection line that connects the first tank and the dilution water line, and a first pump provided in the first connection line,
The second drug injecting unit includes a second connection line that connects the second tank and the dilution water line, and a second pump provided in the second connection line,
The first and second pumps may be pulsating pumps.
（４）前記希釈水ラインが、上流側希釈水ライン、中流側希釈水ラインおよび下流側希釈水ラインを有し、
前記上流側希釈水ラインと前記中流側希釈水ラインとの間に第１バッファタンクおよび撹拌機が設けられると共に、前記中流側希釈水ラインと前記下流側希釈水ラインとの間に第２バッファタンクおよび攪拌機が設けられ、
前記第１薬剤注入部または前記第２薬剤注入部が前記上流側希釈水ラインに接続されると共に、前記第２薬剤注入部または前記第１薬剤注入部が前記第２バッファタンクに接続されていてもよい。
( 4 ) The dilution water line has an upstream dilution water line, a midstream dilution water line, and a downstream dilution water line,
A first buffer tank and a stirrer are provided between the upstream dilution water line and the middle dilution water line, and a second buffer tank is provided between the middle dilution water line and the downstream dilution water line. And a stirrer,
The first drug injection part or the second drug injection part is connected to the upstream dilution water line, and the second drug injection part or the first drug injection part is connected to the second buffer tank. Also good.
このようにしても、安定したｐＨ条件下で次亜ハロゲン酸化合物と結合ハロゲン生成化合物とを反応させて殺菌成分としてのクロラミン類を含む殺菌液を生成することができる。
この構成では、第１および第２ポンプとして低コストの脈動ポンプが好適である。ここで、「脈動ポンプ」とは、吐出圧の変動が大きなポンプであり、一般的なダイヤフラムポンプが代表的に挙げられる。なお、この構成において無脈動ポンプを採用しても構わない。
Even in this case, a sterilizing liquid containing chloramines as a sterilizing component can be produced by reacting a hypohalous acid compound and a combined halogen-generating compound under stable pH conditions.
In this configuration, low-cost pulsation pumps are suitable as the first and second pumps. Here, the “pulsation pump” is a pump with a large fluctuation in discharge pressure, and a typical diaphragm pump is representatively exemplified. In this configuration, a pulsation pump may be employed.
（５）前記希釈水ラインにおける前記第１および第２薬剤注入部よりも下流位置にｐＨセンサが設けられると共に、前記ｐＨセンサからの信号が入力される制御部をさらに備え、
前記第１薬剤注入部が第１ポンプを有し、かつ前記第２薬剤注入部が第２ポンプを有し、
前記制御部は、前記ｐＨセンサからの信号に基づいて前記第１および第２ポンプを個別に制御するよう構成されてもよい。
このようにすれば、製紙工程水に混合する直前の希釈水のｐＨ値が設定値に維持されるように自動制御される。この結果、希釈水中に所望の殺菌成分を所望の割合で安定的に生成され、製紙工程水の殺菌効果を安定的に得ることができる。
( 5 ) A pH sensor is provided at a position downstream of the first and second drug injection units in the dilution water line, and further includes a control unit to which a signal from the pH sensor is input,
The first drug injection part has a first pump, and the second drug injection part has a second pump;
The controller may be configured to individually control the first and second pumps based on a signal from the pH sensor.
If it does in this way, it will control automatically so that the pH value of the dilution water just before mixing with papermaking process water may be maintained at a set value. As a result, a desired sterilizing component is stably generated in a desired ratio in the diluted water, and the sterilizing effect of the papermaking process water can be stably obtained.
（６）前記所定値が±０．１であってもよい。つまり、ｐＨ基準値±０．１としてもよい。
例えば、ｐＨ基準値を８．２５とすれば、ｐＨ値を８．２５±０．１内に維持することができるため、常にｐＨ８以上のアルカリ条件下で次亜ハロゲン酸化合物と結合ハロゲン生成化合物とを反応させ、モノクロラミンを主生成物とするクロラミン類を安定的に生成することが可能となる。
( 6 ) The predetermined value may be ± 0.1. That is, it is good also as pH reference value +/- 0.1.
For example, if the pH reference value is 8.25, the pH value can be maintained within 8.25 ± 0.1. Therefore, a hypohalous acid compound and a combined halogen-generating compound are always used under alkaline conditions of pH 8 or higher. It is possible to stably produce chloramines containing monochloramine as the main product.
以下、図面を参照しながら本発明の製紙工程水の殺菌装置の実施形態について詳説する。 Hereinafter, an embodiment of a paper-making process water sterilizer of the present invention will be described in detail with reference to the drawings.
（実施形態１）
図１は本発明の製紙工程水の殺菌装置を製紙工程水ラインに接続した状態を示す概念図であり、図２は本発明の製紙工程水の殺菌装置の実施形態１を示す構成図である。
(Embodiment 1)
FIG. 1 is a conceptual diagram showing a state in which a papermaking process water sterilization apparatus of the present invention is connected to a papermaking process water line, and FIG. 2 is a block diagram showing Embodiment 1 of a papermaking process water sterilization apparatus of the present invention. .
本発明の製紙工程水の殺菌装置１０は、図示しない水源からの希釈水を製紙工程水ラインＬを導入する希釈水ライン１１と、次亜ハロゲン酸化合物を含む第１溶液を貯蔵する第１タンク１２と、結合ハロゲン生成化合物を含む第２溶液を貯蔵する第２タンク１３と、第１タンク１２内の第１溶液を希釈水ライン１１内の希釈水中に注入する第１薬剤注入部１４と、第２タンク１３内の第２溶液を希釈水ライン１１内の希釈水中に注入する第２薬剤注入部１５と、希釈水ライン１１における第１および第２薬剤注入部１４、１５よりも下流位置に設けられたｐＨセンサ１６と、ｐＨセンサ１６からの信号が入力される制御部１７とを備える。
なお、希釈水としては、製紙工程で通常使用される工業用水を用いることができる。
The paper-making process water sterilizer 10 of the present invention includes a diluting water line 11 for introducing diluting water from a water source (not shown) into the paper-making process water line L, and a first tank for storing a first solution containing a hypohalous acid compound. 12, a second tank 13 for storing a second solution containing a combined halogen-generating compound, a first drug injection unit 14 for injecting the first solution in the first tank 12 into the diluted water in the dilution water line 11, A second drug injection part 15 for injecting the second solution in the second tank 13 into the dilution water in the dilution water line 11, and at a position downstream of the first and second drug injection parts 14, 15 in the dilution water line 11. A pH sensor 16 is provided, and a control unit 17 to which a signal from the pH sensor 16 is input.
In addition, as dilution water, the industrial water normally used by the papermaking process can be used.
実施形態１では、第１薬剤注入部１２の希釈水ライン１１との第１接続ポイントＣ１が、第２薬剤注入部１３の希釈水ライン１１との第２接続ポイントＣ２よりも上流側に配置されている場合を例示している。
この場合、希釈水ライン１１における第１接続ポイントＣ１と第２接続ポイントＣ２との間位置に上流側ミキサーＭ１が設けられると共に、希釈水ライン１１における第２接続ポイントＣ２の下流位置に下流側ミキサーＭ２が設けられている。これらのミキサーＭ１、Ｍ２は、希釈水ライン１１内の水流によって回転する撹拌羽根にて主に構成されている。なお、この撹拌羽根は、例えば、螺旋羽根形状のものを用いることができる。
In Embodiment 1, the 1st connection point C1 with the dilution water line 11 of the 1st chemical | medical agent injection | pouring part 12 is arrange | positioned upstream from the 2nd connection point C2 with the dilution water line 11 of the 2nd chemical | medical agent injection | pouring part 13. The case is shown as an example.
In this case, the upstream mixer M1 is provided at a position between the first connection point C1 and the second connection point C2 in the dilution water line 11, and the downstream mixer is disposed at a downstream position of the second connection point C2 in the dilution water line 11. M2 is provided. These mixers M <b> 1 and M <b> 2 are mainly configured by stirring blades that are rotated by the water flow in the dilution water line 11. In addition, this stirring blade can use a spiral blade shape, for example.
本発明における次亜ハロゲン酸化合物は、次亜塩素酸ナトリウム、次亜塩素酸カルシウム、次亜塩素酸カリウム、次亜臭素酸ナトリウムおよび次亜臭素酸カリウムといった次亜ハロゲン酸化合物であり、これらの次亜ハロゲン酸化合物のうちから１種を単独でまたは２種以上を併用して用いることができる。 The hypohalous acid compound in the present invention is a hypohalous acid compound such as sodium hypochlorite, calcium hypochlorite, potassium hypochlorite, sodium hypobromite and potassium hypobromite. One of the hypohalous acid compounds can be used alone or in combination of two or more.
また、本発明における結合ハロゲン生成化合物は、水溶性の無機アンモニウム塩、アンモニア、スルファミン酸またはその塩、尿素、ヒダントイン化合物、グリシン、スレオニン、リジン、グルタミン酸およびタウリンのうちから選択された１種または２種以上を併用して用いることができる。 In the present invention, the bonded halogen-generating compound is one or two selected from water-soluble inorganic ammonium salts, ammonia, sulfamic acid or salts thereof, urea, hydantoin compounds, glycine, threonine, lysine, glutamic acid and taurine. More than one species can be used in combination.
第１溶液である次亜ハロゲン酸化合物の水溶液としては、市販されている９〜１４％水溶液を好適に用いることができる。また、第２溶液である結合ハロゲン生成化合物の水溶液としては、市販されている結合ハロゲン生成化合物を適宜水で希釈して、所望の濃度になるように調製すればよい。 As the aqueous solution of the hypohalous acid compound that is the first solution, a commercially available 9 to 14% aqueous solution can be suitably used. Moreover, what is necessary is just to prepare the aqueous solution of the coupling | bonding halogen production | generation compound which is a 2nd solution so that it may become a desired density | concentration by diluting a commercially available coupling | bonding halogen production | generation compound with water suitably.
本発明では、殺菌効果および染料影響性の点から、製紙工程水に添加する（ａ）次亜ハロゲン酸化合物の水溶液の濃度は有効塩素濃度として１０００〜９０００ｍｇ／Ｌ、好ましくは２０００〜９０００ｍｇ／Ｌ、（ｂ）結合ハロゲン生成化合物の水溶液の濃度は、１０００〜１００００ｍｇ／Ｌ、好ましくは２０００〜１００００ｍｇ／Ｌであって、かつ、（ａ）成分中の塩素と（ｂ）成分中の窒素のモル比を１：１〜１：２とするのがよい。 In the present invention, from the viewpoint of bactericidal effect and dye influence, the concentration of the aqueous solution of (a) hypohalous acid compound added to the papermaking process water is 1000 to 9000 mg / L, preferably 2000 to 9000 mg / L as the effective chlorine concentration. The concentration of the aqueous solution of the (b) bonded halogen-generating compound is 1000 to 10000 mg / L, preferably 2000 to 10000 mg / L, and the moles of chlorine in the component (a) and nitrogen in the component (b) The ratio is preferably 1: 1 to 1: 2.
第１薬剤注入部１４は、第１タンク１２と希釈水ライン１１とを接続する第１接続ライン１４ａと、第１接続ライン１４ａにおける第１タンク側１２に設けられた第１ポンプ１４ｂと、第１接続ライン１４ａにおける第１接続ポイントＣ１側に設けられた背圧弁１４ｃとを有する。
第２薬剤注入部１５は、第２タンク１３と希釈水ライン１１とを接続する第２接続ライン１５ａと、第２接続ライン１５ａにおける第２タンク側１３に設けられた第２ポンプ１５ｂと、第２接続ライン１５ａにおける第２接続ポイントＣ２側に設けられた背圧弁１５ｃとを有する。
The first drug injecting unit 14 includes a first connection line 14a that connects the first tank 12 and the dilution water line 11, a first pump 14b that is provided on the first tank side 12 of the first connection line 14a, And a back pressure valve 14c provided on the first connection point C1 side in the one connection line 14a.
The second medicine injection unit 15 includes a second connection line 15a that connects the second tank 13 and the dilution water line 11, a second pump 15b that is provided on the second tank side 13 of the second connection line 15a, And a back pressure valve 15c provided on the second connection point C2 side in the two connection lines 15a.
実施形態１の場合、第１および第２ポンプ１４ｂ、１５ｂとして無脈動ポンプが採用されている。この無脈動ポンプとしては、例えば、無脈動ダイヤフラム型ポンプ、モーノポンプ（モアノポンプ）などが挙げられる。なお、後述の実施例１では、株式会社タクミナ製の無脈動ダイヤフラム型（型式ＢＰＬ）ポンプを用いている。 In the case of the first embodiment, pulsating pumps are employed as the first and second pumps 14b and 15b. Examples of the non-pulsating pump include a non-pulsating diaphragm type pump and a Mono pump (Moano pump). In Example 1 described later, a non-pulsating diaphragm type (model BPL) pump manufactured by Takumina Co., Ltd. is used.
また、希釈水ライン１１の上流側には希釈水移送ポンプ１８および入口バルブＶ１が設けられると共に、希釈水ライン１１の下流側は移送ライン１１ａとドレンライン１１ｂに分岐し、移送ライン１１ａはさらに第１、第２および第３分岐ライン１１ａ1、１１ａ2、１１ａ3に分岐している。 A dilution water transfer pump 18 and an inlet valve V1 are provided on the upstream side of the dilution water line 11, and the downstream side of the dilution water line 11 is branched into a transfer line 11a and a drain line 11b. The first, second and third branch lines 11a 1 , 11a 2 and 11a 3 are branched.
ｐＨセンサ１６は移送ライン１１ａに設けられており、そのｐＨセンサ１６の上流側と下流側にはメンテナンスバルブＶ３、Ｖ４が設けられている。また、第１、第２および第３分岐ライン１１ａ1、１１ａ2、１１ａ3には第１、第２および第３切替バルブＶ５、Ｖ６、Ｖ７が設けられ、ドレンライン１１ｂにはドレンバルブＶ２が設けられている。 The pH sensor 16 is provided in the transfer line 11a, and maintenance valves V3 and V4 are provided upstream and downstream of the pH sensor 16. The first, second and third branch lines 11a 1 , 11a 2 and 11a 3 are provided with first, second and third switching valves V5, V6 and V7, and the drain line 11b is provided with a drain valve V2. Is provided.
制御部１７は、ｐＨセンサ１６からの信号に基づいて第１および第２薬剤注入部１４、１５を個別に制御するようこれらと電気的に接続されている。
この制御部１７は、図示省略するが、ｐＨセンサ１６の位置を流れる希釈水のｐＨ値が所定値となるようｐＨ基準値を設定入力する入力部と、設定入力されたｐＨ基準値を記憶する記憶部と、ｐＨセンサ１６からの信号に含まれるｐＨ測定値がｐＨ基準値から逸脱しているか否かを判定する判定部と、判定部の結果に基づいて第１ポンプ１４ｂおよび／または第２ポンプ１５ｂによって移送する第１溶液および／または第２溶液の流量の増減量を演算する演算部と、演算部の結果を制御信号として第１薬剤注入部１４および／または第２薬剤注入部１５へ個別に出力する出力部とを備える。
The control unit 17 is electrically connected to the first and second drug injection units 14 and 15 individually based on the signal from the pH sensor 16.
Although not shown, the control unit 17 stores an input unit for setting and inputting a pH reference value so that the pH value of the dilution water flowing through the position of the pH sensor 16 becomes a predetermined value, and the set and input pH reference value. Based on the result of the storage unit, the pH measurement value included in the signal from the pH sensor 16 deviating from the pH reference value, and the result of the determination unit, the first pump 14b and / or the second pump A calculation unit that calculates an increase / decrease amount of the flow rate of the first solution and / or the second solution transferred by the pump 15b, and a result of the calculation unit as a control signal to the first drug injection unit 14 and / or the second drug injection unit 15. And an output unit for individually outputting.
制御部１７によって設定入力されるｐＨ基準値とは、希釈水ライン１１の最下流における第１溶液と第２溶液とが混合した希釈水の理想的なｐＨ値であり、実施形態１の場合、例えば、ｐＨ８．２５がｐＨ基準値となる。
殺菌装置１０の稼働時において、制御部１７は、ｐＨセンサ１６にて検出したｐＨ測定値とｐＨ基準値とを比較し、単位時間当たりのｐＨ測定値の変動が０．１以内となるように第１および第２ポンプ１４ｂ、１５ｂのモータの駆動を制御する。このとき、希釈水ライン１１を流れる希釈水の流量、第１接続ライン１４ａを流れる第１溶液の濃度と流量、第２接続ライン１５ａを流れる第２溶液の濃度と流量などの各種データを考慮してもよく、その場合は、各種データを予め制御部１７の記憶部へ入力してもよい。
The pH reference value set and input by the control unit 17 is an ideal pH value of the dilution water in which the first solution and the second solution in the most downstream of the dilution water line 11 are mixed. For example, pH 8.25 is the pH reference value.
When the sterilizer 10 is in operation, the control unit 17 compares the pH measurement value detected by the pH sensor 16 with the pH reference value so that the fluctuation of the pH measurement value per unit time is within 0.1. The drive of the motors of the first and second pumps 14b and 15b is controlled. At this time, various data such as the flow rate of the dilution water flowing through the dilution water line 11, the concentration and flow rate of the first solution flowing through the first connection line 14a, and the concentration and flow rate of the second solution flowing through the second connection line 15a are considered. In this case, various data may be input to the storage unit of the control unit 17 in advance.
このように構成された実施形態１の製紙工程水の殺菌装置を稼働させることにより、製紙工程水ラインＬの製紙工程水中に、所望の殺菌成分を最適な濃度で含む希釈水（殺菌液）が導入され、それによって製紙工程水中の微生物が殺菌される。
この際、希釈水移送ポンプ１８が駆動して希釈水ライン１１に所定流量の希釈水が流れると共に、第１および第２ポンプ１４ｂ、１５ｂが無脈動で駆動して第１および第２溶液が一定流量で希釈水中に注入される。
By operating the papermaking process water sterilization apparatus of Embodiment 1 configured as described above, dilution water (sterilizing liquid) containing a desired sterilizing component at an optimal concentration is contained in the papermaking process water of the papermaking process water line L. Introduced, thereby sterilizing microorganisms in the papermaking process water.
At this time, the dilution water transfer pump 18 is driven and a predetermined amount of dilution water flows through the dilution water line 11, and the first and second pumps 14b and 15b are driven without pulsation so that the first and second solutions are constant. It is injected into diluted water at a flow rate.
このとき、第１接続ポイントＣ１に第１溶液が注入されることにより、次亜ハロゲン酸化合物が上流側ミキサーＭ１を通過しながら希釈水と均一に混合して第２接続ポイントＣ２に送られる。そして、第２接続ポイントＣ２に第２溶液が注入されることにより、次亜ハロゲン酸化合物が分散したアルカリ性の希釈水中に結合ハロゲン生成化合物が混合し下流側ミキサーＭ２を通過しながら均一に分散する。それと同時に、次亜ハロゲン酸化合物と結合ハロゲン生成化合物がアルカリ条件下で反応し、例えばモノクロラミンを主生成物とするクロラミン類が生成する。なお、次亜ハロゲン酸化合物と結合ハロゲン生成化合物との混合液はｐＨ８以上となるとモノクロラミンを主生成物としたクロラミン類を生成することが知られている。 At this time, by injecting the first solution into the first connection point C1, the hypohalous acid compound is uniformly mixed with the dilution water while passing through the upstream mixer M1, and sent to the second connection point C2. Then, by injecting the second solution into the second connection point C2, the combined halogen-generating compound is mixed in the alkaline diluted water in which the hypohalous acid compound is dispersed and uniformly dispersed while passing through the downstream mixer M2. . At the same time, the hypohalous acid compound and the combined halogen-generating compound react under alkaline conditions to produce chloramines having, for example, monochloramine as the main product. It is known that a mixed liquid of a hypohalous acid compound and a combined halogen generating compound generates chloramines having monochloramine as a main product when the pH is 8 or more.
モノクロラミンを含む希釈水は殺菌液としてｐＨセンサ１６を通過して各分岐ライン１１ａ1、１１ａ2、１１ａ3に送られ、１本以上の分岐ラインから製紙工程水ラインＬの製紙工程水中へ殺菌液が導入され混合する。この間、ｐＨセンサ１６は殺菌液のｐＨ値を検出してｐＨ測定値信号を制御部１７へ随時送信している。 The diluted water containing monochloramine passes through the pH sensor 16 as a sterilizing solution and is sent to each branch line 11a 1 , 11a 2 , 11a 3 and sterilized from one or more branch lines into the paper making process water of the paper making process water line L. The liquid is introduced and mixed. During this time, the pH sensor 16 detects the pH value of the sterilizing liquid and transmits a pH measurement value signal to the control unit 17 as needed.
ｐＨ測定値信号を受信した制御部１７は、例えば、ｐＨ基準値が８．２５である場合、次のように機能する。
制御部１７は、ｐＨ測定値が８．３５を超えると、モータの回転数を所定回転数まで低下させるよう第１ポンプ１４ｂを制御し、それによりアルカリ性の第１溶液の流量を所定流量まで減少させる。そして、ｐＨ測定値が８．３５以下となると、制御部１７は、モータの回転数を通常回転数まで戻すよう第１ポンプ１４ｂを制御する。
For example, when the pH reference value is 8.25, the control unit 17 that has received the pH measurement value signal functions as follows.
When the measured pH value exceeds 8.35, the control unit 17 controls the first pump 14b to reduce the rotational speed of the motor to a predetermined rotational speed, thereby reducing the flow rate of the alkaline first solution to the predetermined flow rate. Let Then, when the measured pH value is 8.35 or less, the control unit 17 controls the first pump 14b so as to return the rotational speed of the motor to the normal rotational speed.
また、制御部１７は、ｐＨ測定値が８．１５を下回ると、モータの回転数を所定回転数まで低下させるよう第２ポンプ１５ｂを制御し、それにより酸性の第２溶液の流量を所定流量まで減少させる。そして、ｐＨ測定値が８．１５以上となると、制御部１７は、モータの回転数を通常回転数まで戻すよう第２ポンプ１５ｂを制御する。
すなわち、制御部１７は、ｐＨ測定値がｐＨ８．２５±０．１の範囲内に収まるように第１および第２ポンプ１４ｂ、１５ｂを制御する。
Further, when the pH measurement value is less than 8.15, the control unit 17 controls the second pump 15b so as to reduce the rotational speed of the motor to a predetermined rotational speed, thereby reducing the flow rate of the acidic second solution to the predetermined flow rate. To decrease. Then, when the measured pH value is 8.15 or more, the control unit 17 controls the second pump 15b so as to return the rotational speed of the motor to the normal rotational speed.
That is, the control unit 17 controls the first and second pumps 14b and 15b so that the measured pH value falls within the range of pH 8.25 ± 0.1.
なお、前述したｐＨ基準値、制御部１７による第１および第２ポンプ１４ｂ、１５ｂの制御フローは一例であり、本発明はこれに限定されるものではない。また、実施形態１においては、第１および第２ポンプ１４ｂ、１５ｂに無脈動ポンプを採用していることからｐＨ測定値はほとんど変動しない（変動幅は約±０．０５以内）ため、制御部１７を省略することも可能である。 In addition, the control flow of the 1st and 2nd pumps 14b and 15b by the pH reference value and the control part 17 mentioned above is an example, and this invention is not limited to this. In the first embodiment, since the pulsation pumps are used for the first and second pumps 14b and 15b, the pH measurement value hardly fluctuates (the fluctuation range is within about ± 0.05), so that the control unit It is also possible to omit 17.
（実施形態２）
図３は本発明の製紙工程水の殺菌装置の実施形態２を示す構成図である。なお、図３において、図２中の要素と同様の要素には同一の符号を付している。
実施形態１においては第１および第２ポンプ１４ｂ、１５ｂとして無脈動ダイヤフラム型ポンプを用いたが、実施形態２では後述する第１および第２ポンプ２４ｂ、２５ｂとして脈動する通常のダイヤフラムポンプ（以下「脈動ダイヤフラム型ポンプ」という）を用いている。
(Embodiment 2)
FIG. 3 is a block diagram showing Embodiment 2 of the paper-making process water sterilizer of the present invention. In FIG. 3, the same elements as those in FIG. 2 are denoted by the same reference numerals.
In the first embodiment, non-pulsating diaphragm type pumps are used as the first and second pumps 14b and 15b. However, in the second embodiment, normal diaphragm pumps (hereinafter referred to as “the first and second pumps 24b and 25b” described later) "Pulsation diaphragm type pump").
詳しく説明すると、実施形態２の殺菌装置２０は、図示しない水源からの希釈水を製紙工程水ラインＬ（図１参照）を導入する上流側、中流側および下流側希釈水ライン１１Ａ、１１Ｂ、１１Ｃと、上流側希釈水ライン１１Ａと中流側希釈水ライン１１Ｂとの間に設けられた第１バッファタンクＴ１および撹拌機Ｍ２２と、中流側希釈水ライン１１Ｂと下流側希釈水ライン１１Ｃとの間に設けられた第２バッファタンクＴ２および攪拌機Ｍ２２と、次亜ハロゲン酸化合物を含む第１溶液を貯蔵する第１タンク１２と、結合ハロゲン生成化合物を含む第２溶液を貯蔵する第２タンク１３と、第１タンク１２内の第１溶液を上流側希釈水ライン１１Ａ内の希釈水中に注入する第１薬剤注入部２４と、第２タンク１３内の第２溶液を第２バッファタンクＴ２内に導入する第２薬剤注入部２５と、第１および第２薬剤注入部２４、２５よりも下流位置の下流側希釈水ライン１１Ｃに設けられたｐＨセンサ１６と、ｐＨセンサ１６からの信号が入力される制御部１７とを備える。 More specifically, the sterilizer 20 according to the second embodiment has an upstream side, a midstream side, and a downstream side dilution water line 11A, 11B, and 11C for introducing dilution water from a water source (not shown) into the papermaking process water line L (see FIG. 1). And between the first buffer tank T1 and the stirrer M22 provided between the upstream dilution water line 11A and the middle flow dilution water line 11B, and between the middle flow dilution water line 11B and the downstream dilution water line 11C. A provided second buffer tank T2 and a stirrer M22; a first tank 12 for storing a first solution containing a hypohalous acid compound; a second tank 13 for storing a second solution containing a combined halogen-generating compound; A first drug injection part 24 for injecting the first solution in the first tank 12 into the diluted water in the upstream dilution water line 11A, and the second solution in the second tank 13 as the second buffer A second drug injection part 25 to be introduced into the tank T2, a pH sensor 16 provided in the downstream dilution water line 11C at a position downstream of the first and second drug injection parts 24, 25, And a control unit 17 to which a signal is input.
実施形態２の場合、第１バッファタンクＴ１は第２バッファタンクＴ２よりも高い位置に設けられており、水頭差を利用して第１バッファタンクＴ１内の液体を中流側希釈水ライン１１Ｂを介して第２バッファタンクＴ２内へ移送するように構成されている。なお、第２バッファタンクＴ２内の液体は、下流側希釈水ライン１１Ｃに設けられた移送ポンプ２９によって下流側へ移送される。 In the case of the second embodiment, the first buffer tank T1 is provided at a position higher than the second buffer tank T2, and the liquid in the first buffer tank T1 is made to flow through the middle flow side dilution water line 11B by utilizing the water head difference. And is configured to be transferred into the second buffer tank T2. The liquid in the second buffer tank T2 is transferred downstream by a transfer pump 29 provided in the downstream dilution water line 11C.
第１薬剤注入部２４は、第１接続ライン１４ａと、第１ポンプ２４ｂである脈動ダイヤフラム型ポンプと、背圧弁１４ｃとを有してなる。
第２薬剤注入部２５は、第２接続ライン１５ａと、第２ポンプ２５ｂである脈動ダイヤフラム型ポンプと、背圧弁１５ｃとを有してなる。
実施形態２において、その他の構成は概ね実施形態１と同様である。
The first drug injecting unit 24 includes a first connection line 14a, a pulsating diaphragm pump as the first pump 24b, and a back pressure valve 14c.
The second medicine injection unit 25 includes a second connection line 15a, a pulsating diaphragm pump that is the second pump 25b, and a back pressure valve 15c.
In the second embodiment, other configurations are substantially the same as those in the first embodiment.
実施形態２の殺菌装置２０を稼働させると、第１ポンプ２４ｂが脈動ダイヤフラム型ポンプであるため、第１溶液の上流側希釈水ライン１１Ａへの注入の際に脈動が生じる。そのため、上流側希釈水ライン１１Ａの内部においては希釈水中の次亜ハロゲン酸化合物の濃度にばらつきが生じる。 When the sterilizer 20 of the second embodiment is operated, the first pump 24b is a pulsating diaphragm type pump, and therefore pulsation occurs when the first solution is injected into the upstream dilution water line 11A. Therefore, the concentration of the hypohalous acid compound in the diluted water varies within the upstream dilution water line 11A.
しかしながら、上流側希釈水ライン１１Ａを通過した次亜ハロゲン酸化合物を含む希釈水は第１バッファタンクＴ１内へ所定量に達するまで溜められると共に、攪拌機Ｍ２１によって撹拌されるため、第１バッファタンクＴ１内では希釈水中の次亜ハロゲン酸化合物の濃度およびｐＨ値が均一となる。 However, the diluting water containing the hypohalous acid compound that has passed through the upstream diluting water line 11A is stored in the first buffer tank T1 until it reaches a predetermined amount, and is stirred by the stirrer M21. Therefore, the first buffer tank T1 Inside, the concentration and pH value of the hypohalous acid compound in the diluted water are uniform.
均一な濃度およびｐＨ値を有する次亜ハロゲン酸化合物を含む希釈水は、中流側希釈水ライン１１Ｂ介して第２バッファタンクＴ２内へ移送される。そして、第２バッファタンクＴ２内にある程度次亜ハロゲン酸化合物を含む希釈水が溜まったところで、第２薬剤注入部２５によって第２バッファタンクＴ２内に結合ハロゲン生成化合物を含む第２溶液が導入される。このとき、第２ポンプ２５ｂが脈動ダイヤフラム型ポンプであるため、第２溶液の第２バッファタンクＴ２内への導入の際に脈動が生じる。 Dilution water containing a hypohalous acid compound having a uniform concentration and pH value is transferred into the second buffer tank T2 via the middle flow side dilution water line 11B. When the diluted water containing the hypohalous acid compound to some extent is accumulated in the second buffer tank T2, the second solution containing the combined halogen-generating compound is introduced into the second buffer tank T2 by the second drug injecting unit 25. The At this time, since the second pump 25b is a pulsation diaphragm type pump, pulsation occurs when the second solution is introduced into the second buffer tank T2.
しかしながら、容積の大きい第２バッファタンクＴ２内にはある程度の量で溜まった次亜ハロゲン酸化合物を含む希釈水を攪拌機Ｍ２２にて撹拌しながら結合ハロゲン生成化合物を含む第２溶液を導入するため、脈動の影響をほとんど受けることなく安定したアルカリ条件下（安定したｐＨ下）で次亜ハロゲン酸化合物と結合ハロゲン生成化合物とが反応する。この結果、第２バッファタンクＴ２内でモノクロラミンを主生成物とするクロラミン類を含む殺菌液が生成する。 However, in order to introduce the second solution containing the combined halogen-generating compound while stirring the diluted water containing the hypohalous acid compound accumulated in a certain amount in the second buffer tank T2 having a large volume with the stirrer M22, The hypohalous acid compound reacts with the combined halogen-generating compound under stable alkaline conditions (under stable pH) with almost no influence of pulsation. As a result, a sterilizing liquid containing chloramines mainly composed of monochloramine is generated in the second buffer tank T2.
第２バッファタンクＴ２内の殺菌液が所定量溜まったところで、移送ポンプ２９によって殺菌液が１つ以上の分岐ラインを介して製紙工程水ラインＬへ導入される。このとき、ｐＨセンサ１６を通過した殺菌液のｐＨ測定値が制御部１７へ送信され、その後は、実施形態１と同様に制御部１７によって第１および第２ポンプ２４ｂ、２５ｂの駆動が制御され、殺菌液のｐＨ値がｐＨ基準値±０．１の範囲内に維持される。
なお、実施形態２においては、第１および第２バッファタンクＴ１、Ｔ２を設けていることからｐＨ測定値はほとんど変動しない（変動幅は約±０．０５以内）ため、制御部１７を省略することも可能である。
When a predetermined amount of sterilizing liquid in the second buffer tank T2 is accumulated, the sterilizing liquid is introduced into the papermaking process water line L by one or more branch lines by the transfer pump 29. At this time, the measured pH value of the sterilizing liquid that has passed through the pH sensor 16 is transmitted to the control unit 17, and thereafter, the drive of the first and second pumps 24 b and 25 b is controlled by the control unit 17 as in the first embodiment. The pH value of the sterilizing solution is maintained within the range of the pH reference value ± 0.1.
In the second embodiment, since the first and second buffer tanks T1 and T2 are provided, the pH measurement value hardly fluctuates (the fluctuation range is within about ± 0.05), and thus the controller 17 is omitted. It is also possible.
（実施形態３）
実施形態１および２において、次亜ハロゲン酸化合物を含む第１溶液の注入ポイント（第１接続ポイントＣ１）を、結合ハロゲン生成化合物を含む第２溶液の注入ポイント（第２接続ポイントＣ２）よりも下流側に配置してもよい。
(Embodiment 3)
In Embodiments 1 and 2, the injection point (first connection point C1) of the first solution containing the hypohalous acid compound is set to be higher than the injection point (second connection point C2) of the second solution containing the combined halogen-generating compound. You may arrange | position in the downstream.
（実施形態４）
実施形態２における第１および第２ポンプ２４ｂ、２５ｂで使用した脈動ダイヤフラム型ポンプの代わりに、実施形態１で説明した無脈動ダイヤフラム型ポンプを用いてもよい。
(Embodiment 4)
Instead of the pulsating diaphragm type pump used in the first and second pumps 24b and 25b in the second embodiment, the non-pulsating diaphragm type pump described in the first embodiment may be used.
なお、開示された実施の形態は、全ての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上述の説明ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味及び範囲内での全ての変更が含まれることが意図される。 The disclosed embodiments should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
（実施例１）
図２で説明した実施形態１の殺菌装置を稼働させて殺菌液を生成し、ｐＨセンサ１６にて測定したｐＨ測定値の変動を調べ、その結果を図４のグラフに示した。このときの条件は次の通りである。
ｐＨ基本値：８．２５
希釈水ラインに供給される希釈水の流量：１０２Ｌ／ｍｉｎ
第１溶液の組成：次亜塩素酸ナトリウム溶液
第２溶液の組成：硫酸アンモニウム水溶液
第１溶液の基本設定流量：１．７Ｌ／ｍｉｎ
第２溶液の基本設定流量：０．８５ｍＬ／ｍｉｎ
Example 1
The sterilization apparatus of Embodiment 1 described in FIG. 2 was operated to produce a sterilizing solution, and the variation of the measured pH value measured by the pH sensor 16 was examined. The result is shown in the graph of FIG. The conditions at this time are as follows.
pH basic value: 8.25
Flow rate of dilution water supplied to the dilution water line: 102 L / min
Composition of the first solution: Sodium hypochlorite solution Composition of the second solution: Ammonium sulfate aqueous solution Basic setting flow rate of the first solution: 1.7 L / min
Basic setting flow rate of second solution: 0.85 mL / min
（比較例１）
図２で説明した実施形態１の殺菌装置における無脈動ダイヤフラム型ポンプの代わりに
株式会社イワキ社製の脈動ダイヤフラム型ポンプ（型式ＥＨ−Ｆ５５）を用いたこと以外は、実施例１と同じ条件で殺菌装置を可動させて殺菌液を生成し、ｐＨセンサ１６にて測定したｐＨ測定値の変動を調べ、その結果を図５のグラフに示した。
(Comparative Example 1)
The same conditions as in Example 1 were used except that a pulsating diaphragm pump (model EH-F55) manufactured by Iwaki Co., Ltd. was used instead of the non-pulsating diaphragm pump in the sterilizer of Embodiment 1 described in FIG. The sterilizer was moved to generate a sterilizing solution, and the variation of the measured pH value measured by the pH sensor 16 was examined. The result is shown in the graph of FIG.
図４の結果から、実施例１ではｐＨ８．２５±０．１以内に維持されたことがわかった。このことから、生成された実施例１の殺菌液にはモノクロラミンを主生成物とするクロラミン類が安定的に含まれていると推察される。
これに対し、図５の結果から、比較例１ではｐＨ８．２５±０．１を大幅に超え、しかも急激な変動が何回も生じたことがわかった。このことから、生成された比較１の殺菌液にはモノクロラミンとジクロラミンを主生成物とするクロラミン類が含まれていると推察される。
From the results of FIG. 4, it was found that in Example 1, the pH was maintained within 8.25 ± 0.1. From this, it is speculated that the produced sterilizing liquid of Example 1 stably contains chloramines containing monochloramine as a main product.
On the other hand, from the results of FIG. 5, it was found that in Comparative Example 1, the pH greatly exceeded 8.25 ± 0.1, and abrupt fluctuations occurred many times. From this, it is speculated that the produced sterilizing liquid of Comparative 1 contains chloramines containing monochloramine and dichloramine as main products.
１１、希釈水ライン
１１Ａ 上流側希釈水ライン
１１Ｂ 中流側希釈水ライン
１１Ｃ 下流側希釈水ライン
１２ 第１タンク
１３ 第２タンク
１４、２４ 第１薬剤注入部
１５、２５ 第２薬剤注入部
１６ ｐＨセンサ
１７ 制御部
１４ｂ、２４ｂ 第１ポンプ
１５ｂ、２５ｂ 第２ポンプ
Ｃ１ 第１接続ポイント
Ｃ２ 第２接続ポイント
Ｌ 製紙工程水ライン
Ｍ１、Ｍ２ ミキサー
11, dilution water line 11A upstream dilution water line 11B middle flow dilution water line 11C downstream dilution water line 12 first tank 13 second tank 14, 24 first drug injection part 15, 25 second drug injection part 16 pH sensor 17 Control part 14b, 24b 1st pump 15b, 25b 2nd pump C1 1st connection point C2 2nd connection point L Papermaking process water line M1, M2 Mixer
Claims (9)
前記希釈水ラインの最下流における前記第１溶液と第２溶液とが混合した希釈水のｐＨ値の単位時間当たりの変動が所定値以内となるように構成されたことを特徴とする製紙工程水の殺菌装置。 Generating the dilution water line for introducing the papermaking process water line dilution water from a water source, a first tank for storing a first solution containing hypohalous acid compound, a bonded halogen by reaction with hypohalous acid compound A second tank that stores a second solution containing a bound halogen-generating compound that is a compound to be used, a first drug injection unit that injects the first solution in the first tank into the dilution water in the dilution water line, and A second medicine injection part for injecting the second solution in the second tank into the dilution water in the dilution water line,
Papermaking process water characterized in that the fluctuation per unit time of the pH value of the dilution water in which the first solution and the second solution are mixed in the most downstream of the dilution water line is within a predetermined value. Sterilization equipment.
前記第２薬剤注入部は、前記第２タンクと前記希釈水ラインとを接続する第２接続ラインと、前記第２接続ラインに設けられた第２ポンプとを有し、The second drug injecting unit includes a second connection line that connects the second tank and the dilution water line, and a second pump provided in the second connection line,
前記第１および第２ポンプが無脈動ポンプである請求項１〜３のいずれか１つに記載の製紙工程水の殺菌装置。The paper processing process water sterilizer according to any one of claims 1 to 3, wherein the first and second pumps are non-pulsating pumps.
前記上流側希釈水ラインと前記中流側希釈水ラインとの間に第１バッファタンクおよび撹拌機が設けられると共に、前記中流側希釈水ラインと前記下流側希釈水ラインとの間に第２バッファタンクおよび攪拌機が設けられ、
前記第１薬剤注入部または前記第２薬剤注入部が前記上流側希釈水ラインに接続されると共に、前記第２薬剤注入部または前記第１薬剤注入部が前記第２バッファタンクに接続されている請求項１に記載の製紙工程水の殺菌装置。 The dilution water line has an upstream dilution water line, a midstream dilution water line, and a downstream dilution water line,
A first buffer tank and a stirrer are provided between the upstream dilution water line and the middle dilution water line, and a second buffer tank is provided between the middle dilution water line and the downstream dilution water line. And a stirrer,
The first drug injection part or the second drug injection part is connected to the upstream dilution water line, and the second drug injection part or the first drug injection part is connected to the second buffer tank. The paper-making process water sterilizer according to claim 1.
前記第１薬剤注入部が第１ポンプを有し、かつ前記第２薬剤注入部が第２ポンプを有し、
前記制御部は、前記ｐＨセンサからの信号に基づいて前記第１および第２ポンプを個別に制御するよう構成された請求項１〜５のいずれか１つに記載の製紙工程水の殺菌装置。 A pH sensor is provided at a position downstream of the first and second drug injection units in the dilution water line, and further includes a control unit to which a signal from the pH sensor is input,
The first drug injection part has a first pump, and the second drug injection part has a second pump;
The paper making process water sterilizer according to any one of claims 1 to 5 , wherein the control unit is configured to individually control the first and second pumps based on a signal from the pH sensor.
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