JPH0127913Y2 - - Google Patents
Info
- Publication number
- JPH0127913Y2 JPH0127913Y2 JP14504186U JP14504186U JPH0127913Y2 JP H0127913 Y2 JPH0127913 Y2 JP H0127913Y2 JP 14504186 U JP14504186 U JP 14504186U JP 14504186 U JP14504186 U JP 14504186U JP H0127913 Y2 JPH0127913 Y2 JP H0127913Y2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- dephosphorization
- water
- raw water
- pipe
- 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.)
- Expired
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 68
- 239000011575 calcium Substances 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 14
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 11
- 229910052791 calcium Inorganic materials 0.000 claims description 11
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 description 19
- 235000021317 phosphate Nutrition 0.000 description 18
- 239000007788 liquid Substances 0.000 description 15
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 15
- 229910052585 phosphate mineral Inorganic materials 0.000 description 9
- 239000001506 calcium phosphate Substances 0.000 description 7
- 229910000389 calcium phosphate Inorganic materials 0.000 description 7
- 235000011010 calcium phosphates Nutrition 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 7
- 239000012530 fluid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- 238000005352 clarification Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010800 human waste Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 240000007124 Brassica oleracea Species 0.000 description 1
- 235000003899 Brassica oleracea var acephala Nutrition 0.000 description 1
- 235000012905 Brassica oleracea var viridis Nutrition 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 206010013496 Disturbance in attention Diseases 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 229910052816 inorganic phosphate Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、上水、下水、し尿系汚水、工業用
水、工場排水、ボイラー用水、その他あらゆる液
体中に存在するリン酸塩類を液中から除去する接
触脱リン装置に関するものである。[Detailed description of the invention] [Industrial application field] This invention removes phosphates present in water, sewage, human waste water, industrial water, factory wastewater, boiler water, and all other liquids. This relates to a catalytic dephosphorization device.
一般に自然水系に排出される各種液体中には、
無機性のリン酸塩としてオルトリン酸塩や各種の
総合リン酸塩さらに有機性リン酸塩などが様々な
状態で存在しており、これらのリン酸塩類の存在
が湖沼、内海、内湾などの閉鎖性水域乃至は停滞
水域の「あおこ」、「赤潮」発生の誘起因子とな
り、さらに各種の用水として使用する場合に、装
置、配管内に生物学的なスライムが発生し、また
化学的なケールが形成されて、事故発生の重大な
原因となつている。
In various liquids that are generally discharged into natural water systems,
Orthophosphates, various synthetic phosphates, and organic phosphates exist in various states as inorganic phosphates, and the presence of these phosphates causes the closure of lakes, inland seas, and inner bays. It is a factor that induces the occurrence of "blue water" and "red tide" in water bodies or stagnant water bodies.Furthermore, when water is used for various purposes, biological slime is generated in equipment and piping, and chemical kale is generated. are formed and become a serious cause of accidents.
したがつて、内湾などの閉鎖性水域の富栄養化
を防止するため、これら液中に存在するリン酸塩
を除去する必要から、各種の脱リン装置が考案さ
れているが、それらは生物学的脱リン法、化学的
凝集法に基づく装置などである。この中で主流の
リン除去装置は、凝集剤例えば消石灰〔Ca
（OH）2〕、硫酸アルミニウム〔AL2（SO4）3〕、塩
化第２鉄〔FeCl3〕などを添加することにより液
中のリンを不溶性のリン酸塩として沈澱除去する
ものであるが、多量の凝集剤の注入を要し、処理
コストが割り高となり、かつこれに伴い発生する
多量の難脱水性の汚泥の処理装置を必要としてい
るばかりか、また不溶性リン酸塩の沈降性・濃縮
性がきわめて悪く、脱水性が劣り、しかも沈澱池
に多大な敷地面積を必要としているなど実用上多
くの問題をかかえている。
Therefore, in order to prevent eutrophication in closed water bodies such as inner bays, various dephosphorization devices have been devised to remove the phosphates present in these fluids, but they are based on biological technology. These include devices based on the chemical dephosphorization method and chemical coagulation method. Among these, the mainstream phosphorus removal equipment uses flocculants such as slaked lime [Ca].
(OH) 2 ], aluminum sulfate [AL 2 (SO 4 ) 3 ], ferric chloride [FeCl 3 ], etc., to precipitate and remove phosphorus in the liquid as insoluble phosphate. However, it requires the injection of a large amount of flocculant, which increases the processing cost, and requires equipment to treat the large amount of sludge that is difficult to dewater. It has many problems in practical use, such as extremely poor concentration, poor dewatering ability, and the need for a large area for a sedimentation tank.
本考案は、これら従来法に基づく化学的凝集装
置の欠点を解消し、極めて簡単な操作で液中のリ
ン酸塩類を長時間安定して効率よく除去し、さら
に処理設備の省用地化と、処理費用の節減を大幅
にはかり得る接触脱リン装置を提供することを目
的とするものである。 The present invention eliminates the drawbacks of chemical flocculation equipment based on these conventional methods, allows stable and efficient removal of phosphates from liquids over a long period of time with extremely simple operations, and also saves space for processing equipment. The object of the present invention is to provide a catalytic dephosphorization device that can significantly reduce processing costs.
本考案は、槽底部に原水流入管１、槽上部に処
理水流出管４を具備した脱リン槽２を逆錐形状と
し、該脱リン槽２内に脱リン材３を充填し、前記
原水流入管１からの流入原水により槽下方から上
方に向つて流動層部、固定層部、清澄部を
形成するように構成せしめ、少なくとも前記流動
層部より液を循環せしめる循環水管５を配備し
てなる上向接触脱リン装置である。
In the present invention, a dephosphorization tank 2 having a raw water inflow pipe 1 at the bottom of the tank and a treated water outflow pipe 4 at the top of the tank has an inverted conical shape, a dephosphorization material 3 is filled in the dephosphorization tank 2, and the raw water The raw water flowing from the inflow pipe 1 is configured to form a fluidized bed part, a fixed bed part, and a clarified part from the bottom to the top of the tank, and a circulating water pipe 5 is provided to circulate the liquid from at least the fluidized bed part. This is an upward contact dephosphorization device.
本考案における脱リン材３としてのリン酸カル
シウムを含有するリン酸塩鉱物としては種々のも
のがあり、例えばヨルダン産、フロリダ産、メキ
シコ産、カナダ産、神奈川県玄倉産、栃木県足尾
銅山産、与論島産、福島県垂産、北海道大玖鉱山
産などのリン鉱石が用いられる。
There are various phosphate minerals containing calcium phosphate as the dephosphorizing agent 3 in the present invention, such as those produced in Jordan, Florida, Mexico, Canada, Kurokura, Kanagawa Prefecture, Ashio Copper Mine, Tochigi Prefecture, and Yoron. Phosphate rock produced on the island, from Tarui in Fukushima Prefecture, and from the Daiku Mine in Hokkaido is used.
また、本考案においては循環水管５にアルカリ
剤のPH調整剤Ａ又はカルシウム剤Ｂを添加するよ
うに各注入管を適切な位置に具備することによ
り、PH，Caを至適範囲に維持し脱リン材上にお
けるリン酸カルシウムの固定を効率的にならしめ
るようにしている。また被処理液のPHは、酸性側
ではリン酸塩類の除去率が減退し、被処理液の種
類によつては液中に含まれる金属の水酸化物がリ
ン酸塩鉱物表面に析出して、その表面活性を低下
させることがあるので、このような場合には被処
理液のPHを6.0以上、好ましくは6.0〜11.0の範囲
に調整するとよい。なお、実際の用水は中性付近
で使用され、また排水処理の場合でも放流や再利
用するにあたつて中和処理を行うことが多いの
で、このような場合には特別にPH調整を行う必要
がない。 In addition, in the present invention, by providing each injection pipe at an appropriate position so as to add the alkaline PH adjuster A or calcium agent B to the circulating water pipe 5, PH and Ca can be maintained in the optimum range and removed. The fixation of calcium phosphate on the phosphor material is made efficient. In addition, when the pH of the liquid to be treated is acidic, the removal rate of phosphates decreases, and depending on the type of liquid to be treated, metal hydroxides contained in the liquid may precipitate on the surface of phosphate minerals. In such cases, the pH of the liquid to be treated may be adjusted to 6.0 or more, preferably in the range of 6.0 to 11.0. In addition, actual water is used at around neutrality, and even in the case of wastewater treatment, neutralization treatment is often performed before discharging or reusing it, so in such cases, special PH adjustment is required. There's no need.
本考案の実施態様を図面を参照しつつ説明すれ
ば、例えば、し尿を嫌気性消化法で一次処理した
所謂二次処理水を対象とすれば、まずこの二次処
理水に多量の浮遊物質が存在する場合には、この
浮遊物質を沈澱槽または過槽などを通してあら
かじめ除去する。 To explain the embodiment of the present invention with reference to the drawings, for example, if the target is so-called secondary treated water in which human waste is primarily treated by anaerobic digestion, firstly, there is a large amount of suspended solids in this secondary treated water. If present, the suspended solids are removed in advance through a sedimentation tank or filter tank.
このような前処理操作により、あらかじめ浮遊
物質が除去された原水は、必要に応じて酸または
アルカリのPH調整剤Ａを注入してそのPHを6.0以
上、好ましくは6.0〜11.0の至適範囲となるよう
に調整し、原水流入管１から充填塔としての脱リ
ン槽２の下部へ導入する。この脱リン槽２内に
は、リン酸カルシウムを含有するリン酸塩鉱物を
破砕し篩分して一定の粒径（0.42〜0.54mm）とし
たものを脱リン材３として充填してあり、槽構造
は逆円錐、または逆角錐型である。この脱リン槽
２内では下部へ導入される原水の流速に対応し
て、塔内の高さ方向に線速度（LV）が得られる。
すなわち、塔内下方部においてはその横断面積が
小さく、上方部において大となるため、充填され
ているリン酸塩鉱物粒子の脱リン材３の粒径範囲
に応じて下方部において一定高さの流動層部、
その上方部において固定層部、さらにその上部
に清澄部が形成される。 The raw water from which suspended solids have been removed in advance by such pre-treatment operations is injected with an acidic or alkaline PH adjuster A as necessary to adjust its pH to 6.0 or higher, preferably in the optimum range of 6.0 to 11.0. The raw water is adjusted so that it is, and introduced from the raw water inflow pipe 1 to the lower part of the dephosphorization tank 2 as a packed tower. This dephosphorization tank 2 is filled with phosphate minerals containing calcium phosphate crushed and sieved to a certain particle size (0.42 to 0.54 mm) as a dephosphorization material 3. is an inverted cone or an inverted pyramid. In this dephosphorization tank 2, a linear velocity (LV) is obtained in the height direction within the tower corresponding to the flow rate of raw water introduced into the lower part.
In other words, the cross-sectional area is small in the lower part of the tower, and larger in the upper part, so that the cross-sectional area of the column has a certain height in the lower part depending on the particle size range of the dephosphorizing material 3 of the phosphate mineral particles packed. fluidized bed section,
A fixed layer portion is formed in the upper portion thereof, and a clarified portion is further formed above the fixed layer portion.
したがつて、原水が下部から上部に向つて流過
する過程において、まず流動層部において流入
原水と流動状態にあるリン酸塩鉱物粒子の脱リン
材３とが均等に混合接触され、脱リン材３上でリ
ン酸カルシウムの晶析反応が進行する。 Therefore, in the process of raw water flowing from the bottom to the top, the inflowing raw water and the dephosphorizing material 3 made of phosphate mineral particles in a fluidized state are evenly mixed and contacted in the fluidized bed section, and the dephosphorization is carried out. A crystallization reaction of calcium phosphate progresses on the material 3.
また、前記固定層部においては、流動層部
より流出する一部の微粒子リン酸カルシウムが除
去される。 Further, in the fixed bed part, part of the particulate calcium phosphate flowing out from the fluidized bed part is removed.
そして、脱リン槽２の下部から流入する原水の
流速によつて流動層部の脱リン材３が槽内で均
一に流動するように通水条件を設定するのがよ
い。この場合、同時に脱リン槽２内に直接あるい
は原水中にカルシウム剤Ｂ、例えばCaCl2を注入
すると、原水は流動する脱リン材３およびカルシ
ウム剤Ｂと一定の化学的な反応条件で反応し、脱
リン材３の全表面にカルシウムハイドロキシアパ
タイト〔Ca5（OH）（PO4）3〕の反応生成物が固着
生長し、原水中から溶解性のリン酸塩類が除去さ
れる。このようにして脱リン材３との緊密な接触
によつて溶解性リン酸塩が除去された処理水は、
脱リン槽２の上部に至つて清澄部の処理水流出
管４から系外へ取り出される。 It is preferable to set the water flow conditions so that the dephosphorizing material 3 in the fluidized bed part flows uniformly in the tank depending on the flow rate of the raw water flowing from the lower part of the dephosphorizing tank 2. In this case, when calcium agent B, for example CaCl 2 , is simultaneously injected directly into the dephosphorization tank 2 or into the raw water, the raw water reacts with the flowing dephosphorization agent 3 and calcium agent B under certain chemical reaction conditions, A reaction product of calcium hydroxyapatite [Ca 5 (OH) (PO 4 ) 3 ] adheres and grows on the entire surface of the dephosphorizing material 3, and soluble phosphates are removed from the raw water. The treated water from which soluble phosphates have been removed through close contact with the dephosphorizing agent 3 in this way is
The treated water reaches the upper part of the dephosphorization tank 2 and is taken out of the system from the clarification section's outflow pipe 4.
また、前記流動層部の上部に流動液循環水管
５を循環ポンプ６を介して流動液の一部を循環さ
せるようにする。 In addition, a part of the fluid is circulated through a fluid circulating water pipe 5 through a circulation pump 6 in the upper part of the fluidized bed section.
このように脱リン処理水を循環返送して処理す
ることにより、流動層部におけるリン酸カルシ
ウムの脱リン材への過剰付着により目詰まり及び
流動状態の悪化の防止や、流動層部より流出す
る微細なリン酸カルシウムと脱リン材の接触頻度
の向上並びに脱リン材上の汚染物質の除去がで
き、そのほか
(i) 流入水の水量、濃度変動の均一化
(ii) 脱リン槽通過液の流速の維持
(iii) 流動処理条件下における脱リン槽内の反応条
件の均一化
(iv) 処理水中に流出するカルシウムイオンの循環
利用および流出硬度成分の捕捉
(v) 原水あるいは脱リン槽内の反応部分のリン酸
塩類のイオン濃度の低濃度化
などの作用効果も期待することができる。この(i)
〜(iii)については、原水中に含まれている溶解性リ
ン酸塩類と脱リン槽２内に充填されているリン酸
塩鉱物の脱リン材３とが反応してカルシウムハイ
ドロキシアパタイト〔Ca5（OH）（PO4）3〕が生成
されるための最適条件の調整及び原水と循環処理
水の脱リン槽内の通水速度（流速）の維持、すな
わち処理条件の定常化に効果があり、安定した処
理を行うことができる。しかも脱リン槽２を流動
層方式で運転する場合には充填物を常に流動状態
に維持する必要があり、このためには脱リン槽２
内を通過する液の流速を一定にすることが必要で
あり、前記循環水管５による循環方式が最も効果
的である。 By circulating and returning the dephosphorized water for treatment, it is possible to prevent clogging and deterioration of the fluidized state due to excessive adhesion of calcium phosphate to the dephosphorizing material in the fluidized bed, and to prevent fine particles flowing out from the fluidized bed. It is possible to improve the frequency of contact between calcium phosphate and the dephosphorization material and remove contaminants on the dephosphorization material, as well as (i) equalize the volume and concentration fluctuations of inflow water, (ii) maintain the flow rate of the liquid passing through the dephosphorization tank ( iii) Equalization of reaction conditions in the dephosphorization tank under fluid treatment conditions (iv) Circulation of calcium ions flowing out into the treated water and capture of flowed hard components (v) Reduction of phosphorus in the raw water or the reaction part in the dephosphorization tank Effects such as lowering the ion concentration of acid salts can also be expected. This (i)
Regarding ~(iii), the soluble phosphates contained in the raw water react with the phosphate mineral dephosphorization agent 3 filled in the dephosphorization tank 2 to form calcium hydroxyapatite [Ca 5 It is effective in adjusting the optimal conditions for the production of (OH)(PO 4 ) 3 ] and in maintaining the water flow rate (flow rate) in the dephosphorization tank of raw water and recycled treated water, that is, in stabilizing the treatment conditions. , stable processing can be performed. Moreover, when the dephosphorization tank 2 is operated in a fluidized bed mode, it is necessary to maintain the filling in a fluidized state at all times, and for this purpose, the dephosphorization tank 2
It is necessary to keep the flow rate of the liquid passing through the water constant, and the circulation system using the circulation water pipe 5 is the most effective.
なお流動層部の流動液循環にあわせて前記脱
リン槽２内の上部にある清澄部の部分又は必要
に応じ処理水流出管４より循環水管５′を循環ポ
ンプ６′を介して原水流入管１あるいは破線に示
す如く脱リン槽２内に直接連結し、処理水の一部
を循環させるようにするとなお一層効果的であ
る。この場合前記アルカリ剤、カルシウム剤の注
入は原水にカルシウム剤、循環水にアルカリ剤と
してもよいし、循環水に両方を注入してもよい。
例えばカルシウム剤Ｂの注入点は、脱リン槽２の
下部に直接或いは原水流入管１の途中で脱リン槽
２に近い位置若しくは循環水管５又は５′の途中
でなるべく脱リン槽２に近い位置などとすること
がよい。 In addition, in accordance with the circulation of the fluidized liquid in the fluidized bed section, the raw water inflow pipe is connected to the clarification section in the upper part of the dephosphorization tank 2 or, if necessary, from the treated water outflow pipe 4 to the circulating water pipe 5' via the circulation pump 6'. 1 or as shown by the broken line, it is even more effective to connect directly to the dephosphorization tank 2 and circulate a portion of the treated water. In this case, the alkali agent and calcium agent may be injected into the raw water and the alkaline agent into the circulating water, or both may be injected into the circulating water.
For example, the injection point of the calcium agent B can be directly at the lower part of the dephosphorization tank 2, at a position near the dephosphorization tank 2 in the middle of the raw water inflow pipe 1, or at a position as close to the dephosphorization tank 2 as possible in the middle of the circulating water pipe 5 or 5'. It is better to do something like this.
また、本考案においてカルシウム剤Ｂを添加す
る場合、カルシウム剤をCa／PO4モル重量比で
１〜５の範囲で添加するが、過剰のカルシウムは
処理水と共に硬度成分として流出し、放流先の公
共用水の水質を悪化させるおそれがあるので、こ
れを循環させることによつて脱リン槽２内でカル
シウムハイドロキシアパタイトを生成せしめる目
的に再利用すれば、硬度成分の処理水への流出を
最小限の範囲にとどめることができる。 In addition, when adding calcium agent B in the present invention, the calcium agent is added at a Ca/ PO4 molar weight ratio in the range of 1 to 5, but excess calcium flows out as a hardness component with the treated water and is discharged to the discharge destination. Since there is a risk of deteriorating the quality of public water, by circulating it and reusing it for the purpose of generating calcium hydroxyapatite in the dephosphorization tank 2, the flow of hard components into the treated water can be minimized. can be kept within the range.
さらに本考案の循環方式では原水あるいは脱リ
ン槽内の溶解性リン酸塩類の濃度を低濃度化でき
ることを利点とするものである。すなわち、原水
中に含まれている溶解性リン酸塩類を、リン酸塩
鉱物の表面にCa5（OH）（PO4）3の結晶として晶出
させるためには特定の反応方法、反応条件が必要
であり、反応条件の一つとして原水が脱リン槽に
導入される以前に、カルシウム剤と濃厚な溶解性
リン酸塩類、アルカリ度成分などと接触させない
ことであるが、このような反応条件は脱リンされ
て溶解性リン酸塩類濃度が希薄となつた流動液を
循環返送することによつて脱リン槽内へ導入され
る原水中のリン酸塩類濃度を容易に低濃度化する
ことができ、安定した脱リン処理が行われる。 Furthermore, the circulation system of the present invention has the advantage of being able to lower the concentration of soluble phosphates in the raw water or in the dephosphorization tank. In other words, in order to crystallize soluble phosphates contained in raw water as Ca 5 (OH) (PO 4 ) 3 crystals on the surface of phosphate minerals, specific reaction methods and reaction conditions are required. This is necessary, and one of the reaction conditions is to prevent the calcium agent from coming into contact with concentrated soluble phosphates, alkalinity components, etc. before the raw water is introduced into the dephosphorization tank. It is possible to easily lower the phosphate concentration in the raw water introduced into the dephosphorization tank by circulating and returning the fluid that has been dephosphorized and has a diluted soluble phosphate concentration. This results in stable dephosphorization.
本考案によれば、あらゆる液体中に存在する溶
解性リン酸塩類をリン酸塩鉱物の脱リン材表面に
Ca5（OH）（PO4）3として晶出、固着せしめ、極め
て簡単な操作、装置によつて高濃度のリン酸塩類
を液から確実に除去し得るのみならず、リン酸塩
鉱物の分離、脱水を容易にし、しかも、少なくと
も流動層部からの液の効果的な循環により、処理
を安定的にならしめ、従来の欠点をも適確に除去
し質的にも良質な処理水を大量に経済的に得ら
れ、処理設備、処理費用をも大幅に節減できる利
益がある。
According to the present invention, soluble phosphates present in all liquids are transferred to the surface of the dephosphorizing material of phosphate minerals.
It is crystallized and fixed as Ca 5 (OH) (PO 4 ) 3 , and it is not only possible to reliably remove high-concentration phosphates from the liquid with extremely simple operation and equipment, but also to separate phosphate minerals. , which facilitates dewatering, and at least makes the treatment stable through effective circulation of the liquid from the fluidized bed section, accurately eliminates the drawbacks of conventional methods, and produces a large amount of high-quality treated water. It is economically possible to obtain this method, and there is an advantage that processing equipment and processing costs can be significantly reduced.
図面は本考案の実施態様を示す説明図である。
１……原水流入管、２……脱リン槽、３……脱
リン材、４……処理水流出管、５，５′……循環
水管、６，６′……循環ポンプ、Ａ……PH調整剤、
Ｂ……カルシウム剤、……流動層部、……固
定層部、……清澄部。
The drawings are explanatory views showing embodiments of the present invention. 1... Raw water inflow pipe, 2... Dephosphorization tank, 3... Dephosphorization material, 4... Treated water outflow pipe, 5, 5'... Circulating water pipe, 6, 6'... Circulating pump, A... PH adjuster,
B...Calcium agent,...Fluidized bed section,...Fixed bed section,...Clearing section.
Claims (1)
水流出管４を具備した脱リン槽２を逆錐形状と
し、該脱リン槽２内に脱リン材３を充填し、前
記原水流入管１からの流入原水により槽下方か
ら上方に向つて流動層部、固定層部、清澄
部を形成するように構成せしめ、少なくとも
前記流動層部より液を循環せしめる循環水管
５を配備したことを特徴とする上向流接触脱リ
ン装置。 (2) 前記循環水管５が、カルシウム剤Ｂの注入管
を備えたものである実用新案登録請求の範囲第
１項記載の脱リン装置。[Claims for Utility Model Registration] (1) The dephosphorization tank 2, which is equipped with a raw water inflow pipe 1 at the bottom of the tank and a treated water outflow pipe 4 at the top of the tank, is shaped like an inverted cone. The tank is filled with phosphor material 3, and the raw water flowing from the raw water inflow pipe 1 forms a fluidized bed part, a fixed bed part, and a clarified part from the bottom to the top of the tank. An upward flow catalytic dephosphorization device characterized by being equipped with a circulating water pipe 5 for circulating water. (2) The dephosphorization device according to claim 1, wherein the circulating water pipe 5 is equipped with a calcium agent B injection pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14504186U JPH0127913Y2 (en) | 1986-09-24 | 1986-09-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14504186U JPH0127913Y2 (en) | 1986-09-24 | 1986-09-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6259197U JPS6259197U (en) | 1987-04-13 |
| JPH0127913Y2 true JPH0127913Y2 (en) | 1989-08-24 |
Family
ID=31056210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14504186U Expired JPH0127913Y2 (en) | 1986-09-24 | 1986-09-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0127913Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5794423B2 (en) * | 2011-09-30 | 2015-10-14 | 三菱マテリアル株式会社 | Processing method and processing apparatus for removing harmful substances |
-
1986
- 1986-09-24 JP JP14504186U patent/JPH0127913Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6259197U (en) | 1987-04-13 |
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