JPH0790210B2 - Solution injection method and device - Google Patents
Solution injection method and deviceInfo
- Publication number
- JPH0790210B2 JPH0790210B2 JP3356721A JP35672191A JPH0790210B2 JP H0790210 B2 JPH0790210 B2 JP H0790210B2 JP 3356721 A JP3356721 A JP 3356721A JP 35672191 A JP35672191 A JP 35672191A JP H0790210 B2 JPH0790210 B2 JP H0790210B2
- Authority
- JP
- Japan
- Prior art keywords
- solution
- slurry
- injection
- slaked lime
- membrane module
- 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 - Fee Related
Links
- 238000002347 injection Methods 0.000 title claims description 55
- 239000007924 injection Substances 0.000 title claims description 55
- 239000000243 solution Substances 0.000 title claims description 46
- 238000000034 method Methods 0.000 title claims description 33
- 239000002002 slurry Substances 0.000 claims description 60
- 239000012528 membrane Substances 0.000 claims description 40
- 239000012047 saturated solution Substances 0.000 claims description 27
- 239000000126 substance Substances 0.000 claims description 18
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 50
- 239000000920 calcium hydroxide Substances 0.000 description 48
- 235000011116 calcium hydroxide Nutrition 0.000 description 48
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 46
- 230000000630 rising effect Effects 0.000 description 19
- 238000004090 dissolution Methods 0.000 description 17
- 238000001914 filtration Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 239000010802 sludge Substances 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 238000011978 dissolution method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 238000005374 membrane filtration Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 235000017550 sodium carbonate Nutrition 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/04—Feed or outlet devices; Feed or outlet control devices using osmotic pressure using membranes, porous plates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は産業上の薬注設備、特に
水処理施設などにおける薬注設備に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to industrial chemical injection equipment, and more particularly to chemical injection equipment in water treatment facilities.
【０００２】[0002]
【従来の技術】浄水分野を例として従来の薬注設備と溶
液注入方法について説明する。近年、水道水のｐＨ調整
のための後アルカリ注入設備の計画が増えてきている。
それに使用するアルカリ剤としては、苛性ソーダ、ソー
ダ灰や消石灰などが用いられている。消石灰を使用する
ことは、パイプの腐食をパイプの内面に炭酸カルシウム
の被膜をつくることで防止できること、および安価であ
ることで、他のアルカリを使用することより優れてい
る。2. Description of the Related Art A conventional chemical injection facility and solution injection method will be described by taking the field of water purification as an example. In recent years, plans for a post-alkali injection facility for adjusting the pH of tap water have been increasing.
As the alkaline agent used for this, caustic soda, soda ash, slaked lime, etc. are used. The use of slaked lime is superior to the use of other alkalis because it can prevent corrosion of the pipe by forming a coating of calcium carbonate on the inner surface of the pipe and is inexpensive.
【０００３】しかしながら、消石灰はその溶解時に薬剤
飛散の問題があることや溶解度が非常に低いことからス
ラリー状として使用される場合が多い。しかしスラリー
状として使用する場合、水道水のｐＨ調整のための後ア
ルカリとして注入すると浄水池の底部に消石灰やその他
の沈殿物が生じるなどの問題があり、他のアルカリに比
べ現状では採用例が少ない。消石灰を飽和溶液として注
入すれば、上記のような問題は解決されるので、最近連
続的に消石灰の飽和溶液を作りだす装置が開発されてき
ている。However, slaked lime is often used in the form of a slurry because it has a problem of drug scattering during dissolution and has a very low solubility. However, when it is used as a slurry, there is a problem that slaked lime and other precipitates are generated at the bottom of the water purification pond when it is injected as an alkali after adjusting the pH of tap water. Few. Since the above problems can be solved by injecting slaked lime as a saturated solution, recently, an apparatus for continuously producing a saturated solution of slaked lime has been developed.
【０００４】上記の通り消石灰の溶解度は苛性ソーダや
ソーダ灰の溶解度に比べて非常に低く、消石灰だけが溶
解度が温度に逆比例している。消石灰の飽和濃度は約
０．２％で、飽和溶液を作製しようとすれば消石灰の約
５００倍の水が必要となる。この消石灰の溶解挙動を生
かして消石灰の飽和溶液を作り出す装置としては次に示
すような装置が挙げられる。As described above, the solubility of slaked lime is much lower than the solubilities of caustic soda and soda ash, and only slaked lime has a solubility inversely proportional to temperature. The saturated concentration of slaked lime is about 0.2%, and in order to prepare a saturated solution, about 500 times as much water as slaked lime is required. As an apparatus for producing a saturated solution of slaked lime by making the best use of the dissolution behavior of slaked lime, the following apparatus can be mentioned.
【０００５】１．上昇水流による接触溶解方式によるも
の。この方式は、溶解槽中の溶解水の上昇流速により、
消石灰スラリー層を槽内のあるレベルに保ち、この層を
通過する溶解水と接触によって消石灰の飽和溶液を作り
出す方式である。この方式の装置は１種のスラッジブラ
ンケットタイプの高速沈殿池であり、消石灰スラリー層
がスラッジブランケットを形成している。このタイプの
代表例を図２および図３に示す。1. By the contact dissolution method with rising water flow. This method is based on the rising velocity of the dissolved water in the dissolution tank.
This is a method in which a slaked lime slurry layer is maintained at a certain level in the tank and a saturated solution of slaked lime is created by contact with dissolved water passing through this layer. This type of device is one type of sludge blanket type high-speed sedimentation tank, and the slaked lime slurry layer forms the sludge blanket. A representative example of this type is shown in FIGS.
【０００６】図２のタイプは小容量型として使用されて
いる装置で、溶解槽１２中の溶液にスラリー供給管１３
より消石灰スラリーを供給し給水管１４からは溶解水を
給水する。溶解槽１２中には中間にブランケット層１７
が生成し、この層を通過する溶液は通過中に消石灰の飽
和溶液となり、溶液流出管１５より取り出される。未溶
解の消石灰や不溶解物を含んだドレインはドレイン弁１
６より排出される。この装置の場合消石灰スラリーは間
欠供給である。The type shown in FIG. 2 is an apparatus used as a small-capacity type.
More slaked lime slurry is supplied, and dissolved water is supplied from the water supply pipe 14. A blanket layer 17 is provided in the middle of the dissolution tank 12.
Is generated, and the solution passing through this layer becomes a saturated solution of slaked lime during the passage and is taken out from the solution outflow pipe 15. Drain valve that contains undissolved slaked lime and insoluble matter 1
It is discharged from 6. In this device, the slaked lime slurry is intermittently supplied.
【０００７】図３のタイプは大容量型として使用されて
いる装置で、装置の各要素部の名称およびその作用は図
２の装置の要素部と同じである。図３の装置では未溶解
の消石灰を含むスラッジをスラッジ引抜き管１８より取
り出して回収し、消石灰スラリーとして再生できるよう
になっている。また、この装置の場合は消石灰スラリー
の供給は連続または間欠供給のどちらでもよい。The type shown in FIG. 3 is a device used as a large-capacity type, and the names and functions of each element of the device are the same as those of the device shown in FIG. In the apparatus shown in FIG. 3, sludge containing undissolved slaked lime is taken out from the sludge drawing pipe 18 and recovered to be regenerated as slaked lime slurry. Further, in the case of this apparatus, the slaked lime slurry may be supplied either continuously or intermittently.
【０００８】上昇水流方式はスラリーゾーンを維持する
ために、消石灰スラリーの供給は連続供給となるケース
が多く、従って制御を要する因子が消石灰スラリーの供
給と溶解水の供給の２因子のコントロールとなる。ま
た、スラリーゾーンは上昇水流によって維持させるた
め、上昇流速に制限が生じる。上昇水流が小さ過ぎる場
合はスラリーは沈降しゾーンの維持はできなくなる。逆
に上昇水流が高過ぎる場合はスラリーは総てキャリーオ
ーバする危険がある。In the rising water flow system, in order to maintain the slurry zone, the supply of the slaked lime slurry is often continuous, so that the factors that need to be controlled are the two factors, the supply of the slaked lime slurry and the supply of dissolved water. . Further, since the slurry zone is maintained by the rising water flow, the rising flow velocity is limited. If the rising water flow is too small, the slurry will settle and the zone cannot be maintained. On the contrary, if the rising water flow is too high, there is a risk that the slurry will all carry over.
【０００９】そのため、一般的に上昇流速は４０〜１０
０ｍｍ／ｍｉｎの範囲となり、溶解水の供給量はこの範
囲に制限されることになる。また、運転停止後再開する
場合、スラリーは底部に沈降しており、正常なスラリー
ゾーンを形成するには時間を要する。このように上昇水
流方式は運転管理が難しく、注入制御範囲が狭いことが
欠点である。Therefore, the rising flow velocity is generally 40 to 10
The range is 0 mm / min, and the supply amount of dissolved water is limited to this range. Further, when the operation is restarted and then restarted, the slurry is settled at the bottom, and it takes time to form a normal slurry zone. As described above, the rising water flow system has drawbacks in that it is difficult to manage the operation and the injection control range is narrow.
【００１０】２．攪拌機による攪拌接触方式によるも
の。この方式は溶解槽と攪拌機とより成り、攪拌機によ
り機械的エネルギーを水に与えて溶解する方式である。
このタイプの代表例を図４に示す。2. With a stirring contact method using a stirrer. This system is composed of a dissolving tank and a stirrer, and mechanical energy is applied to water by the stirrer to dissolve the water.
A representative example of this type is shown in FIG.
【００１１】図４において、消石灰をバッチ式に溶解槽
１９に投入口２１より投入・貯留し、必要な消石灰飽和
溶液とするに見合った水を溶解槽１９の下部の給水管２
０から供給し、攪拌機２３による攪拌によって消石灰ス
ラリー層２５を形成し、さらに水を供給して低速で溶解
液を上昇させて、飽和溶液を槽の上部より溢流させ溶液
流出管２２よりより取り出す。未溶解の消石灰や不溶解
物を含んだドレインはドレイン弁２４より排出される。In FIG. 4, slaked lime is batch-wise charged and stored in the dissolution tank 19 through an inlet 21, and water corresponding to a necessary saturated slaked lime solution is supplied to the water supply pipe 2 below the dissolution tank 19.
0, and the slaked lime slurry layer 25 is formed by stirring with a stirrer 23. Further, water is supplied to raise the dissolved liquid at a low speed, the saturated solution is overflowed from the upper part of the tank and taken out from the solution outflow pipe 22. . The drain containing undissolved slaked lime and insoluble matter is discharged from the drain valve 24.
【００１２】この方式は、消石灰の注入がバッチで行わ
れるため、溶解水の供給量のみをコントロールすること
でよいので、維持管理が容易である。しかし、飽和溶液
とするために槽内の上昇流速は上昇水流方式のそれと比
較して１／１０程度にする必要がある。したがって、溶
解槽の単位面積当たりの能力は上昇水流方式の１／１
０、言い換えれば設置面積が１０倍必要となる。このた
め、処理量が大きくなると非常に大きいスペースが必要
となる欠点を有する。In this system, since the injection of slaked lime is carried out in batches, it is sufficient to control only the amount of the dissolved water supplied, so that maintenance is easy. However, in order to obtain a saturated solution, the rising flow velocity in the tank needs to be about 1/10 of that in the rising water flow system. Therefore, the capacity per unit area of the dissolution tank is 1/1 of that of the rising water flow system.
0, in other words, the installation area is required 10 times. For this reason, there is a drawback that a very large space is required as the processing amount increases.
【００１３】上記消石灰を例として説明した飽和溶液の
製造設備は、他の薬品の飽和溶液の製造にも適用でき
る。特に消石灰の溶解の場合のように溶解度が低く、か
つ溶解度が温度に逆比例するような薬品の飽和溶液の製
造に役立つ。しかし、従来方式ではいずれも溶解槽内の
溶液の上昇流速により飽和溶液の生成速度が制限され、
製造速度が遅いので大量に製造するためには大規模の装
置が必要となり、従って装置には広いスペースを準備し
なければならない。また、溶液の上昇流速のコントロー
ルが必要であるので安定に製造するためには制御装置や
その他の附属設備を設けなければならず、装置が複雑と
なり、かつ高価になる。The facility for producing a saturated solution described above using slaked lime as an example can be applied to the production of a saturated solution of other chemicals. It is particularly useful for the production of saturated solutions of chemicals where the solubility is low and the solubility is inversely proportional to temperature, as in the case of slaked lime dissolution. However, in both conventional methods, the rate of saturated solution generation is limited by the rising flow rate of the solution in the dissolution tank.
Since the production speed is slow, a large-scale device is required for high-volume production, and therefore a large space must be prepared for the device. Further, since it is necessary to control the rising flow rate of the solution, it is necessary to provide a control device and other auxiliary equipment for stable production, which makes the device complicated and expensive.
【００１４】[0014]
【発明が解決しようとする課題】本発明の目的は薬品の
上記溶液注入方法および溶液注入装置における問題点を
解消し、溶解槽内の上昇流速に影響されず、操作が簡単
な溶液注入方法を提供し、かつ注入装置はコンパクトで
シンプルな構造のものとすることにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the problems in the above solution injection method and solution injection device for chemicals, and to provide a solution injection method that is easy to operate without being affected by the rising flow rate in the dissolution tank. The present invention is to provide an injection device with a compact and simple structure.
【００１５】[0015]
【課題を解決するための手段】上記課題は本発明の注入
方法や注入装置を開発することによって解決することが
できる。The above problems can be solved by developing an injection method and an injection device of the present invention.
【００１６】すなわち、１）薬品を所定の注入場所に注
入する工程において、該薬品のスラリー中に膜モジュー
ルを浸漬し、該膜モジュールを介して飽和溶液を分離
し、所定の注入場所に注入することを特徴とする溶液注
入方法。That is, 1) in the step of injecting a chemical into a predetermined injection location, the membrane module is immersed in a slurry of the chemical, the saturated solution is separated through the membrane module and injected into the predetermined injection location. A method for injecting a solution, comprising:
【００１７】２）薬品を所定の注入場所に注入する注入
装置において、該注入装置には少なくともスラリー槽、
該スラリー槽中に浸漬して設けた膜モジュールおよび該
膜モジュールに連通する処理配管とを備えていることを
特徴とする溶液注入装置。2) In an injection device for injecting a chemical into a predetermined injection place, the injection device has at least a slurry tank,
A solution injecting apparatus comprising: a membrane module immersed in the slurry tank and a treatment pipe communicating with the membrane module.
【００１８】３）上記１）に記載の溶液注入工程におい
て、膜モジュールに連通する処理配管に処理ポンプを接
続し、該処理ポンプを使用して飽和溶液の分離、注入お
よび該膜モジュールの洗浄を兼ね行う溶液注入方法。3) In the solution injecting step described in 1) above, a treatment pump is connected to the treatment pipe communicating with the membrane module, and the treatment pump is used to separate and inject the saturated solution and to wash the membrane module. A solution injection method that is also used.
【００１９】４）上記２）に記載の溶液注入装置におい
て、膜モジュールに連通する処理配管に正逆に回転可能
な処理ポンプを接続することを特徴とする溶液注入装
置。スラリー中に浸漬した外圧型膜モジュールを介して
飽和溶液を分離し注入することを特徴とする溶液注入方
法。4) The solution injecting device as described in 2) above, wherein a process pump that is rotatable in forward and reverse directions is connected to the process pipe communicating with the membrane module. A method for injecting a solution, which comprises separating and injecting a saturated solution through an external pressure type membrane module immersed in a slurry.
【００２０】本発明の方法および装置は飽和溶液の生成
が溶解水の上昇流速に影響されない製造方法であり、ス
ラリーの濾過によるという新規な思想によるものであ
り、十分に濾過の精度を保つために膜を用いるものであ
る。The method and apparatus of the present invention is a production method in which the formation of a saturated solution is not affected by the rising flow rate of the dissolved water, and is based on the novel idea of filtering the slurry. In order to maintain sufficient filtration accuracy, It uses a membrane.
【００２１】本発明において、スラリーとは薬品を水に
溶解して飽和あるいは飽和に近い溶液と共存して薬品の
未溶解物及び非溶解物を含んだ状態を意味する。また、
スラリー槽とはスラリーが入っている槽を意味する。さ
らにまた、注入方法および注入装置とは単に溶液を注入
する方法およびそれに使用する装置ではなく、スラリー
から飽和溶液を膜モジュールを会して濾過・分離し、そ
の後該溶液を利用先に送液し、使用先（注入点）で注入
する方法、およびこれら機能を発揮する装置を意味す
る。In the present invention, the slurry means a state in which a drug is dissolved in water and coexists with a saturated or near-saturated solution containing undissolved substances and undissolved substances. Also,
The slurry tank means a tank containing the slurry. Furthermore, the injection method and the injection device are not simply the method of injecting the solution and the device used therefor, but the saturated solution is filtered and separated from the slurry by the membrane module, and then the solution is sent to the destination. , The method of injecting at the point of use (injection point), and the device that exhibits these functions.
【００２２】膜を用いて直接溶液を濾過精製し、その溶
液を使用先（注入点）に注入する方式は従来より行われ
ている方式であるが、常に飽和濃度にある溶液を得る目
的でスラリー中に膜モジュールを浸漬する方式を採用し
た例は類を見ない。The method of directly filtering and purifying a solution using a membrane and injecting the solution at the point of use (injection point) is a conventional method, but it is a slurry for the purpose of always obtaining a solution having a saturated concentration. There is no other example that adopts the method of dipping the membrane module inside.
【００２３】使用する膜としては、上記例示した消石灰
の場合には膜の孔径がＭＦ級で十分であるが、用途に応
じてＵＦ級などを適宜選択する。膜の材質は濾過する薬
品の性状に適したものを選択する。例えば消石灰の場合
には耐アルカリ性の膜が必要で、望ましくはセラミック
膜とする。As the membrane to be used, in the case of the above-mentioned slaked lime, the pore size of the membrane is MF grade, but UF grade or the like is appropriately selected according to the application. The material of the membrane is selected to be suitable for the properties of the chemical to be filtered. For example, in the case of slaked lime, an alkali resistant film is required, and preferably a ceramic film.
【００２４】本発明では、開放の溶解槽中で外圧式膜モ
ジュールを使用することが好ましく、この際吸引式で濾
過圧を生起することが好ましい。すなわち、外圧式膜モ
ジュールの処理溶液を、例えば消石灰スラリーより飽和
消石灰溶液を、膜モジュールに連通する処理配管から流
出させる場合には、その処理配管に吸引ポンプを接続し
て、吸引ポンプにより飽和溶液を濾過・流出させること
である。In the present invention, it is preferable to use the external pressure type membrane module in an open dissolution tank, and at this time, it is preferable to generate the filtration pressure by suction type. That is, the treatment solution of the external pressure type membrane module, for example, when the saturated slaked lime solution from the slaked lime slurry is allowed to flow out from the treatment pipe communicating with the membrane module, a suction pump is connected to the treatment pipe, and the saturated solution is drawn by the suction pump. Is to filter and flow out.
【００２５】さらに本発明の特徴とするところは、上記
ポンプとして吸引機能のみでなく加圧機能も発揮できる
ポンプを使用すると、このポンプを用いて水をこの外圧
式膜モジュールの内側から送って膜モジュールの水また
は溶液による洗浄を行うことができることにある。上記
吸引機能のみでなく加圧機能を発揮できるポンプとして
は例えば容積ネジポンプが挙げられる。この容積ネジポ
ンプはさらに定量ポンプとしての機能を有するので、処
理溶液を定量的に濾過し送液し、注入することができる
利点がある。A further feature of the present invention is that when a pump capable of exerting not only a suction function but also a pressurizing function is used as the pump, water is sent from the inside of the external pressure type membrane module using this pump. It is possible to clean the module with water or a solution. As a pump that can exert not only the suction function but also the pressurizing function, there is a positive displacement screw pump, for example. Since this positive displacement screw pump further has a function as a metering pump, there is an advantage that the processing solution can be quantitatively filtered, sent, and injected.
【００２６】膜の洗浄方法には空気洗浄する方法もある
が、飽和溶液を取り扱う膜濾過工程では空気によるバブ
リングによって溶質が膜表面に析出する場合があるので
好ましくなく、この場合膜モジュールの内側からの水な
ど液体を用いて洗浄することが好ましい。There is a method of cleaning the membrane with air, but it is not preferable because solute may be deposited on the membrane surface due to bubbling with air in the membrane filtration step of handling a saturated solution. In this case, from the inside of the membrane module. It is preferable to wash with a liquid such as water.
【００２７】本発明の溶液注入方法や装置の利点をまと
めて示せば以下の通りである。 本発明では膜を利用してスラリーから濾過により飽和
溶液を取り出すため、従来の方式の場合のように飽和溶
液として取り出すのにスラリー槽中の液の上昇流速など
を微妙にコントロールする必要などの制約条件がなく、
またスラリー槽への薬剤の仕込みはバッチ方式でよの
で、本発明の溶液注入方法は操作し易くまた装置を運転
・維持することも極めて容易である。 本発明の駆動原動力として例えば容積ネジポンプを利
用した場合にはポンプの回転数の制御によって広い範囲
の溶液の注入ができる。The advantages of the solution injection method and apparatus of the present invention can be summarized and shown below. In the present invention, since the saturated solution is taken out from the slurry by filtration using the membrane, it is necessary to delicately control the rising flow rate of the liquid in the slurry tank in order to take out the saturated solution as in the conventional method. No conditions,
Further, since the chemicals are charged into the slurry tank in a batch system, the solution injection method of the present invention is easy to operate and it is also very easy to operate and maintain the device. When a positive displacement screw pump is used as the driving force of the present invention, a wide range of solution can be injected by controlling the rotation speed of the pump.
【００２８】また、本発明の方法ではスラリー槽に仕
込む溶液の濃度を高くできるので、使用する溶解槽の容
積を小さくできる。 処理ポンプを容積ネジポンプのような多機能ポンプと
することで、濾過、注入のみでなく膜モジュールの洗浄
の操作も１台のポンプでできるので、装置がシンプルに
できる。Further, according to the method of the present invention, since the concentration of the solution charged in the slurry tank can be increased, the volume of the dissolution tank used can be reduced. When the processing pump is a multi-function pump such as a positive displacement screw pump, not only filtration and injection but also cleaning of the membrane module can be performed with one pump, so that the apparatus can be simplified.
【００２９】従って本発明の溶液注入方法は操作し易
く、装置は簡単で設置スペースが少なくて済み、価格が
易いなど多くの利点を持っている。本発明の溶液注入方
法および注入装置は特に、溶解度が低く、また溶解度が
温度に逆比例するような薬品の溶液注入方法および注入
装置として適するものであるが薬品にのみ適用の対称を
限定するものではない。Therefore, the solution injection method of the present invention has many advantages such as easy operation, simple apparatus, small installation space, and low cost. INDUSTRIAL APPLICABILITY The solution injection method and injection apparatus of the present invention are particularly suitable as a solution injection method and injection apparatus for chemicals having low solubility and whose solubility is inversely proportional to temperature, but limiting the symmetry of application only to chemicals. is not.
【００３０】[0030]
【実施例】以下、本発明の注入装置の具体的１例を図１
に示し、また取り扱う薬品を消石灰を例として本発明を
説明するが、以下の説明は本発明をこれに限定されるも
のではない。EXAMPLE A concrete example of the injection device of the present invention is shown in FIG.
The present invention will be described by taking slaked lime as an example of the chemicals to be handled and handled, but the following description does not limit the present invention.
【００３１】（実施例１）図１において、注入装置は消
石灰スラリーに適するスラリー槽１と処理ポンプ２から
なる。スラリー槽１にはスラリーの沈降を防止する攪拌
機３が設置され、またスラリー槽１中に外圧型膜モジュ
ール４が浸漬されている。膜モジュール４は送液管５で
処理ポンプ２と連絡され、さらに処理ポンプ２の出口か
ら注入配管６で注入弁７を介して注入点に接続される。
また、処理ポンプ２の出口からの注入配管６は注入弁７
の前で分岐し、給水配管８となり給水弁９を介して給水
槽に接続されている。スラリー槽１の下部にはドレイン
弁１１が設置されており、消石灰中の非溶解物を排出で
きる。(Embodiment 1) In FIG. 1, the injection apparatus comprises a slurry tank 1 suitable for slaked lime slurry and a processing pump 2. An agitator 3 for preventing sedimentation of the slurry is installed in the slurry tank 1, and an external pressure type membrane module 4 is immersed in the slurry tank 1. The membrane module 4 is connected to the processing pump 2 by a liquid supply pipe 5, and is further connected to an injection point from an outlet of the processing pump 2 through an injection pipe 6 through an injection valve 7.
Further, the injection pipe 6 from the outlet of the processing pump 2 is connected to the injection valve 7
In front of the water supply pipe, it becomes a water supply pipe 8 and is connected to a water supply tank via a water supply valve 9. A drain valve 11 is installed in the lower part of the slurry tank 1 to discharge the non-dissolved matter in the slaked lime.
【００３２】回転数制御器１０よりの信号によって処理
ポンプ２の正転、逆転および回転数を制御することがで
きる。本実施例では処理ポンプ２は容積ネジポンプであ
るため正転、逆転が可能であり、また、回転数制御によ
り注入量の調整が行える。The forward rotation, the reverse rotation and the rotation speed of the processing pump 2 can be controlled by a signal from the rotation speed controller 10. In the present embodiment, since the processing pump 2 is a positive displacement screw pump, it can be rotated in the normal direction and the reverse direction, and the injection amount can be adjusted by controlling the rotation speed.
【００３３】スラリー槽１の消石灰スラリーの濃度を
０．５〜５％程度とする。ここで、消石灰スラリーの濃
度とは未溶解の消石灰を含んだ濃度でこのスラリーを濾
過すると処理溶液は消石灰の飽和溶液となる。スラリー
槽１へ消石灰を投入する仕方はスラリー状でも、粉末の
まま投入しても構わない。上記投入消石灰をスラリーに
溶解し、スラリー槽１を消石灰スラリーで満水にした
後、攪拌機３を運転しスラリーが沈殿しないようにす
る。次に処理ポンプ２を起動し、膜モジュール４から消
石灰飽和溶液を吸引濾過し、処理配管５を経て、注入配
管６の注入弁７と通って注入点へ送液する。注入量の制
御は処理ポンプ２の回転数制御にて行う。The concentration of the slaked lime slurry in the slurry tank 1 is set to about 0.5 to 5%. Here, the concentration of the slaked lime slurry is a concentration containing undissolved slaked lime, and when this slurry is filtered, the treatment solution becomes a saturated solution of slaked lime. The slaked lime may be added to the slurry tank 1 in the form of slurry or powder. After the input slaked lime is dissolved in the slurry and the slurry tank 1 is filled with the slaked lime slurry, the stirrer 3 is operated to prevent the slurry from settling. Next, the processing pump 2 is started to suction-filter the slaked lime saturated solution from the membrane module 4, and the solution is sent to the injection point through the processing pipe 5 and the injection valve 7 of the injection pipe 6. The injection amount is controlled by controlling the rotation speed of the processing pump 2.
【００３４】処理を続行し、膜の吸引圧が設定値まで上
がった時点で洗浄を開始する。洗浄は注入弁７を閉め、
給水弁９を開としてから、処理ポンプ２を逆転させて、
膜モジュール４に清水を通水する。洗浄水量は回転数の
制御にて行う。この洗浄により、清水が膜の内側から外
側へ通水され、膜の表面に付着した消石灰を剥離する。
剥離された消石灰のみならず、使用された洗浄水は消石
灰の溶解水として再利用される。The treatment is continued, and the washing is started when the suction pressure of the membrane rises to the set value. For cleaning, close the injection valve 7,
After opening the water supply valve 9, reverse the processing pump 2 and
Fresh water is passed through the membrane module 4. The amount of washing water is controlled by controlling the rotation speed. By this washing, clear water is passed from the inside of the film to the outside, and the slaked lime adhering to the surface of the film is peeled off.
Not only the exfoliated slaked lime but also the used cleaning water is reused as the dissolved water of the slaked lime.
【００３５】処理が続行され、スラリー槽１の水位があ
る程度低下したら、スラリー槽１に水を補給する。これ
を繰り返すとスラリー槽１のスラリー濃度が希薄にな
り、概ね０．５％程度になったら消石灰を新しく投入す
る。When the treatment is continued and the water level in the slurry tank 1 drops to some extent, the slurry tank 1 is replenished with water. When this is repeated, the slurry concentration in the slurry tank 1 becomes diluted, and when it becomes approximately 0.5%, new slaked lime is added.
【００３６】[0036]
【発明の効果】本発明の溶液注入方法は膜を利用して、
スラリーから飽和溶液を取り出すためコントロールすべ
き要因が少なく操作し易い。本発明の溶液注入装置は、
スラリー槽中に浸漬して外圧型膜モジュールを設け、膜
モジュールを処理配管によって正逆に回転可能な処理ポ
ンプを連結して、濾過・注入と共に洗浄も可能にするこ
とによって、装置を構造のシンプルな設置スペースを取
らないものとでき、従って廉価な装置とすることができ
る。The solution injection method of the present invention utilizes a membrane,
Since the saturated solution is taken out from the slurry, there are few factors to control and it is easy to operate. The solution injection device of the present invention is
An external pressure type membrane module is installed by immersing it in a slurry tank, and the membrane module is connected to a treatment pump that can be rotated in the forward and reverse directions through a treatment pipe to enable filtration and injection as well as cleaning, thereby simplifying the device structure. It does not take up a lot of installation space, and thus can be an inexpensive device.
【図１】本発明の膜濾過方式による溶液注入装置のフロ
ー図。FIG. 1 is a flow chart of a solution injection device according to the membrane filtration method of the present invention.
【図２】上昇水流による接触溶解方式による溶解装置の
１例の断面図。FIG. 2 is a cross-sectional view of an example of a dissolution apparatus by a contact dissolution method using rising water flow.
【図３】上昇水流による接触溶解方式による溶解装置の
別の例の断面図。FIG. 3 is a cross-sectional view of another example of the dissolution apparatus by the contact dissolution method with rising water flow.
【図４】攪拌機による攪拌接触方式による溶解装置の１
例の断面図。FIG. 4 is a dissolution apparatus 1 by a stirring contact method using a stirrer.
Sectional view of the example.
１ スラリー槽 ２ 処理ポンプ ３ 攪拌機 ４ 膜モジュール ５ 処理配管 ６ 注入配管 ７ 注入弁 ８ 給水配管 ９ 給水弁 １０ 回転数制御器 １１ ドレイン弁 １２ 溶解槽 １３ スラリー供給管 １４ 給水管 １５ 溶液流出管 １６ ドレイン弁 １７ ブランケット層 １８ スラッジ引抜き管 １９ 溶解槽 ２０ 給水管 ２１ 投入口 ２２ 溶液流出管 ２３ 攪拌機 ２４ ドレイン弁 ２５ スラリー層 1 Slurry Tank 2 Processing Pump 3 Stirrer 4 Membrane Module 5 Processing Pipe 6 Injection Pipe 7 Injection Valve 8 Water Supply Pipe 9 Water Supply Valve 10 Rotation Speed Controller 11 Drain Valve 12 Dissolution Tank 13 Slurry Supply Pipe 14 Water Supply Pipe 15 Solution Outflow Pipe 16 Drain Valve 17 Blanket layer 18 Sludge extraction pipe 19 Dissolution tank 20 Water supply pipe 21 Input port 22 Solution outflow pipe 23 Stirrer 24 Drain valve 25 Slurry layer
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０２Ｆ 1/66 ５１０ Ｂ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location C02F 1/66 510 B
Claims (4)
おいて、該薬品のスラリー中に膜モジュールを浸漬し、
該膜モジュールを介して飽和溶液を分離し、所定の注入
場所に注入することを特徴とする溶液注入方法。1. In the step of injecting a chemical into a predetermined injection place, the membrane module is immersed in a slurry of the chemical,
A method for injecting a solution, which comprises separating a saturated solution through the membrane module and injecting the solution into a predetermined injection site.
置において、該注入装置には少なくともスラリー槽、該
スラリー槽中に浸漬して設けた膜モジュールおよび該膜
モジュールに連通する処理配管とを備えていることを特
徴とする溶液注入装置。2. An injecting device for injecting a chemical into a predetermined injecting place, the injecting device having at least a slurry tank, a membrane module immersed in the slurry tank, and a treatment pipe communicating with the membrane module. A solution injection device characterized by being provided.
て、膜モジュールに連通する処理配管に処理ポンプを接
続し、該処理ポンプを使用して飽和溶液の分離、注入お
よび該膜モジュールの洗浄を兼ね行う溶液注入方法。3. The solution injecting step according to claim 1, wherein a treatment pump is connected to a treatment pipe communicating with the membrane module, and the treatment pump is used to separate and inject a saturated solution and to wash the membrane module. A solution injection method that is also used.
て、膜モジュールに連通する処理配管に正逆に回転可能
な処理ポンプを接続することを特徴とする溶液注入装
置。4. The solution injecting device according to claim 2, wherein a process pump which is rotatable forward and reverse is connected to a process pipe communicating with the membrane module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3356721A JPH0790210B2 (en) | 1991-12-26 | 1991-12-26 | Solution injection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3356721A JPH0790210B2 (en) | 1991-12-26 | 1991-12-26 | Solution injection method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05169049A JPH05169049A (en) | 1993-07-09 |
| JPH0790210B2 true JPH0790210B2 (en) | 1995-10-04 |
Family
ID=18450451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3356721A Expired - Fee Related JPH0790210B2 (en) | 1991-12-26 | 1991-12-26 | Solution injection method and device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0790210B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7311223B2 (en) * | 2004-05-07 | 2007-12-25 | Fluid Management, Inc. | Apparatus for dispensing a plurality of powders and method of compounding substances |
| KR100480807B1 (en) * | 2004-09-23 | 2005-04-07 | 이철화 | Calcium hydroxide feeding apparatus having filter, the calcium hydroxide feeding methods using the same and the water purifying methods thereof |
| WO2006033522A1 (en) * | 2004-09-23 | 2006-03-30 | Jeongsoo Enginerring Co., Ltd. | Calcium hydroxide feeding apparatus having filter, the calcium hydroxide feeding methods using the same and the water purifying methods thereof |
-
1991
- 1991-12-26 JP JP3356721A patent/JPH0790210B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05169049A (en) | 1993-07-09 |
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