JPS6028802A - Controlling method of discharge of slurry in crystallizer - Google Patents
Controlling method of discharge of slurry in crystallizerInfo
- Publication number
- JPS6028802A JPS6028802A JP13681683A JP13681683A JPS6028802A JP S6028802 A JPS6028802 A JP S6028802A JP 13681683 A JP13681683 A JP 13681683A JP 13681683 A JP13681683 A JP 13681683A JP S6028802 A JPS6028802 A JP S6028802A
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- discharge
- crystallizer
- crystal
- mother liquor
- 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.)
- Pending
Links
Abstract
Description
【発明の詳細な説明】
本発明は、肥料、食品、薬品などの種々の有機化学工業
分野および無機化学工業分野において広く用いられてい
る結晶化方法に関し、特に濃縮後のスラリーを結晶缶か
ら抜き出すため結晶缶内スラリー抜出しｆｆｉ ＩＩ
ａ１１方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crystallization method that is widely used in various organic and inorganic chemical industries such as fertilizers, foods, and pharmaceuticals, and in particular involves extracting a slurry after concentration from a crystallization can. Slurry removal from crystal can ffi II
This relates to the a11 method.
ＤＴｉ型（［） ｒａｒｔ Ｔ’ ｕｂｅ ａｌｌｄ
Ｂ ａｂｌｅ ；強制循環型）結晶化装置は、結晶缶内
に、結晶缶内溶液を上昇させるためのドラフトチューブ
が立設され、そのドラフトチューブの外周にバッフルチ
ューブによりセットリング域が形成され、被処理溶液は
加熱されたのち結晶缶の下部に供給され、ドラフトチュ
ーブ内を上昇する間に蒸ＲＩＩＡ縮されてドラフトチュ
ーブ外周から降下し、結晶粒子の大きいものは分級脚よ
り濃縮スラリーとして抜き出され、微粒子を含んだ溶液
はセットリング域から取り出され再び加熱されたのら結
晶缶に強制循環させるものである。DTi type ([) rart T' ube alld
Bable (forced circulation type) crystallization apparatus has a draft tube erected in the crystallizer for raising the solution in the crystallizer, and a settling area is formed by a baffle tube around the outer circumference of the draft tube. After being heated, the processing solution is supplied to the lower part of the crystallization vessel, and while rising in the draft tube, it is evaporated and reduced by RIIA, and falls from the outer circumference of the draft tube, and those with large crystal particles are extracted as a concentrated slurry from the classification leg. The solution containing fine particles is taken out from the settling zone, heated again, and then forcedly circulated into the crystallization vessel.
分級脚から抜き出される濃縮スラリーはその後遠心分１
１１ｔｌＮにより固液分離され固を分は結晶として回収
される。通常、結晶缶内で析出する結晶の濃度制御のた
めスラリー抜出し量をＩＩＩ ａｌｌリ−る必修がある
が、結晶缶内のスラリー濃度が低い場合、スラリー抜出
し量を少なくするために抜出しポンプの吐出量を絞り弁
にて絞って少なくづると、遠心分離機に至る配管中のス
ラリーの流速が低下し配管中にスラリー中の結晶が沈降
したり、絞り弁を閉塞するなどの問題が生じ、分級脚か
らのスラリー抜出し量を思うように制ｔＩｌ′！ｌるこ
とはできない。The concentrated slurry extracted from the classification leg is then centrifuged into 1
Solid-liquid separation is performed using 11 tlN, and the solid fraction is recovered as crystals. Normally, in order to control the concentration of crystals precipitated in the crystal can, it is necessary to drain the amount of slurry extracted, but if the slurry concentration in the crystal can is low, the discharge of the extraction pump should be adjusted to reduce the amount of slurry extracted. If the amount is reduced by restricting the amount with a throttle valve, the flow rate of the slurry in the piping leading to the centrifuge will decrease, causing problems such as crystals in the slurry settling in the piping and blocking the throttle valve, which will hinder the classification. Control the amount of slurry extracted from the legs as you wish! I can't do it.
本発明の目的は、結晶缶からのスラリー抜出し量を自由
に制御できるようにすることにある。An object of the present invention is to make it possible to freely control the amount of slurry extracted from a crystal can.
本発明は、結晶缶からスラリーを抜き出し、遠心分離し
て結晶化づる結晶缶内スラリー抜き出し量１１１ＪＩ１
１方法において、遠心分離により分離された母液をスラ
リー抜出しポンプに戻すと共に、イの母液の戻し量を結
晶缶内スラリー濃度に応じて制御することを特徴とする
もので、遠心分離された母液がスラリー抜出しポンプの
吸込側に戻されることにより、遠心分離機へ送られるス
ラリーの流速を一定に保ち、かつその母液の戻し量を結
晶缶内スラリー１１ｊ［に応じて制御することにより抜
出し量を自在に制御できるようにしたものである。The present invention extracts slurry from a crystal can, centrifuges it, and crystallizes it.
In method 1, the mother liquor separated by centrifugation is returned to the slurry extraction pump, and the amount of mother liquor returned in step (a) is controlled according to the slurry concentration in the crystallization vessel, so that the centrifuged mother liquor is By returning the slurry to the suction side of the slurry withdrawal pump, the flow rate of the slurry sent to the centrifugal separator is kept constant, and the amount of the mother liquor withdrawn can be freely controlled by controlling the amount of returned slurry according to the slurry 11j in the crystal can. It was designed so that it could be controlled.
以下、本発明に係る結晶缶内スラリー抜出し邑制御方法
の一実施例を添付図面に基づいて説明１゛る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method for controlling the extraction of slurry in a crystal can according to the present invention will be described below with reference to the accompanying drawings.
図において１はＤＴＢ型結晶缶で、その中央部にドラフ
トチューブ２が立設され、その外周にはバッフルチュー
ブ３が設けられ、バッフルチューブ３と缶内壁との間に
セットリング域４が形成される。ドラフトチューブ２の
下方には、ドラフトチューブ２内で液を上昇させるＩＩ
Ｊ’ｌ’ １１５が設けられ、また、結晶缶１の下部
の傾斜壁に分級脚６が設けられ、結晶缶１の上部にはベ
ーパー排出ロアが設けられている。In the figure, 1 is a DTB type crystal can, in which a draft tube 2 is erected in the center, a baffle tube 3 is provided on the outer periphery of the draft tube, and a settling region 4 is formed between the baffle tube 3 and the inner wall of the can. Ru. Below the draft tube 2, there is a
J'l' 115 is provided, a classification leg 6 is provided on the sloped wall of the lower part of the crystal can 1, and a vapor discharge lower is provided in the upper part of the crystal can 1.
８は加熱器、９は循環ポンプで、夫々循環ライン１０に
接続され、結晶缶１内の液をセットリング域４から取出
し、循環ポンプ９、加熱器８を通して結晶缶１の下部に
液を戻し、循環させる。１１は原液供給管で、加熱器８
と循環ポンプ９の間の循環ライン１０に接続される。循
環ライン１０には補助ポンプ１２が接続され、分級脚６
に分級用の液を供給する。Reference numeral 8 denotes a heater, and reference numeral 9 denotes a circulation pump, which are each connected to the circulation line 10 and take out the liquid in the crystal can 1 from the settling area 4, and return the liquid to the lower part of the crystal can 1 through the circulation pump 9 and the heater 8. , circulate. 11 is the stock solution supply pipe, and heater 8
and a circulation line 10 between the circulation pump 9 and the circulation pump 9. An auxiliary pump 12 is connected to the circulation line 10, and the classification leg 6
Supply liquid for classification.
分級脚６にはスラリー抜出し管１３が接続され、スラリ
ー抜出し管１３にスラリー抜出しポンプ１４が接続され
る。スラリー抜出しポンプ１の吐出側のスラリー供給管
１５は遠心分離機１６に接続される。A slurry extraction pipe 13 is connected to the classification leg 6, and a slurry extraction pump 14 is connected to the slurry extraction pipe 13. A slurry supply pipe 15 on the discharge side of the slurry extraction pump 1 is connected to a centrifuge 16 .
遠心分Ｉｌ１機１６で遠心分離された固型分はライン１
７から取り出され、母液分は母液戻し管１８によりスラ
リー抜出し管１３に接続される。母液戻し管１８にはダ
イ１７フラム弁などの絞り弁１９が接続される。The solid fraction centrifuged in centrifugal fraction Il1 machine 16 is transferred to line 1.
7, and the mother liquor is connected to the slurry extraction pipe 13 via a mother liquor return pipe 18. A throttle valve 19 such as a die 17 flam valve is connected to the mother liquor return pipe 18 .
結晶゛缶１内にはスラリー濃度検知器２０が段重）られ
、その信号がスラリー抜出し量調整器２１に入力され、
抜き出し和調整器２１からの出力信号２２により絞り弁
１０の開度が調節される。A slurry concentration detector 20 is installed in the crystal can 1, and its signal is input to a slurry withdrawal amount regulator 21.
The opening degree of the throttle valve 10 is adjusted by the output signal 22 from the extraction sum adjuster 21.
次に上記構成をもつ装置に基づき本発明の詳細な説明す
る。Next, the present invention will be explained in detail based on the apparatus having the above configuration.
結晶缶１内の液はドラフトチューブ２内を上昇し、そこ
で蒸発し、濃縮されて結晶が成長し、ドラ７１−チュー
ブ２の外周を降下する。液分及び微小な結晶分はレット
リング域４から取り出され加熱器８で加熱されて結晶缶
１内に循環される。トラフ＋チューブ２の外周を降下す
る結晶粒子を含ｌυだスラリーは分級脚６に入り、そこ
で粒径が分級されたのち、スラリー抜出し管１３からス
ラリー抜出しポンプ１４を通し遠心分ｍ１ｖＡ１６に供
給され、そこで遠心分離され、結晶分はライン１７から
取り出される。The liquid in the crystal can 1 rises in the draft tube 2, evaporates there, concentrates, grows crystals, and descends around the outer periphery of the drum 71-tube 2. The liquid and minute crystal components are taken out from the retring zone 4, heated by a heater 8, and circulated into the crystal canister 1. The slurry containing crystal particles descending on the outer periphery of the trough + tube 2 enters the classification leg 6, where the particle size is classified, and then supplied from the slurry extraction pipe 13 to the centrifugal part m1vA 16 through the slurry extraction pump 14, There, it is centrifuged and the crystals are removed through line 17.
結晶缶１内のスラリー濃度が低い場合、結晶を成長させ
るため循環を繰り返し、スラリー抜き出し量を少なくす
るが、その場合、スラリー濃度検知器２０から抜出し―
調整器２１を介して絞り弁１９の１Ｆｔ１度を大きくす
ることにより遠心分離機１６から分離された母液を戻り
管１８を介してスラリー抜出しポンプ１４の吸込側に流
して分級脚６からのスラリー抜き出し量を少なくするこ
とができ、しかも抜出されたスラリーは母液と一緒にス
ラリー供給管１５を流れるためその流速が一定に保持さ
れ管１５内で結晶が沈降することはない。When the slurry concentration in the crystal can 1 is low, circulation is repeated to grow crystals and the amount of slurry extracted is reduced.
By increasing 1Ft1 degree of the throttle valve 19 via the regulator 21, the mother liquor separated from the centrifuge 16 is allowed to flow through the return pipe 18 to the suction side of the slurry extraction pump 14, and the slurry is extracted from the classification leg 6. The amount of slurry can be reduced, and since the extracted slurry flows through the slurry supply pipe 15 together with the mother liquor, its flow rate is kept constant and crystals do not settle within the pipe 15.
また、結晶缶１内のスラリー濃度が高い場合には抜出し
量調整器２１により絞り弁１９の開度を少なくし、分級
脚６よりスラリーをより多く抜き出すことができる。Further, when the slurry concentration in the crystal can 1 is high, the opening degree of the throttle valve 19 is reduced by the withdrawal amount regulator 21, so that more slurry can be withdrawn from the classification leg 6.
このように遠心分ｉｌ１機１８で分離された母液を適宜
スラリー抜出しポンプ１４の吸込み側に戻すことでスラ
リー抜出しポンプ１４の吐出量を一定に保持さｖｌしか
もスラリー抜出し量を自在に調節づることが可能となる
。By appropriately returning the mother liquor separated by the centrifugal unit 18 to the suction side of the slurry extraction pump 14, the discharge amount of the slurry extraction pump 14 can be maintained constant, and the amount of slurry extraction can be freely adjusted. It becomes possible.
なお、遠心弁ｌｌ１Ｉｌされた母液はスラリー抜出しポ
ンプ１４の吸込側に戻ず他に適宜原液供給管１１に戻づ
よう構成づる。また、上記実施例では結晶装置としてＤ
ＴＢ型を用いたものを例示したが、強制循環型（Ｆ、Ｃ
，）結晶装置にも用いることもできるのは勿論である。The mother liquor passed through the centrifugal valve 111 is not returned to the suction side of the slurry extraction pump 14, but is instead returned to the stock solution supply pipe 11 as appropriate. In addition, in the above embodiment, D is used as a crystal device.
Although the TB type is used as an example, forced circulation type (F, C
, ) Of course, it can also be used in crystal devices.
以上詳述してきたことから明らかなように本発明によれ
ば次のごとき優れた効果を発揮する。As is clear from what has been described in detail above, the present invention exhibits the following excellent effects.
（１） 遠心分離された母液をスラリー抜出しポンプの
吸込側に戻し、しかもその量を調節づることにより抜き
出しポンプの吐出量を一定に保持した状態でスラリー抜
出し量を制御することができる。(1) By returning the centrifuged mother liquor to the suction side of the slurry extraction pump and adjusting the amount, it is possible to control the amount of slurry extraction while keeping the discharge amount of the extraction pump constant.
（２） 抜出しポンプの吐出間を一定に保持できるため
、スラリー抜き出し量が少なくても遠心分離機へ至る管
内で結晶が沈降し１＝すすることがない。(2) Since the discharge interval of the extraction pump can be kept constant, even if the amount of slurry extracted is small, crystals will not settle in the pipe leading to the centrifuge and will not be sipped.
（３） 結晶缶内のスラリー濃度に応じて母液の戻し量
を制御することができるので結晶缶内の濃度制御が最適
に行なえる。(3) Since the amount of mother liquor returned can be controlled according to the slurry concentration in the crystal can, the concentration in the crystal can can be optimally controlled.
添付図面は本発明に係る結晶缶内スラリー抜出し量制御
方法の一実施例を示７図である。
図中、１は結晶缶、１３はスラリー抜出し管、１４はス
ラリー抜出しポンプ、１Ｇは遠心分離機、１８は母液戻
し管、２２はスラリー抜出し邑調整器である。
特許出願人 石川島播磨重］−業株式会社代理人弁理士
絹 谷 信 雄The attached drawings are seven views showing one embodiment of the method for controlling the amount of slurry withdrawn from a crystal can according to the present invention. In the figure, 1 is a crystallization can, 13 is a slurry extraction pipe, 14 is a slurry extraction pump, 1G is a centrifugal separator, 18 is a mother liquor return pipe, and 22 is a slurry extraction regulator. Patent applicant: Ishikawajima-Harimaju] - Nobuo Kinuya, patent attorney at Gyogyo Co., Ltd.
Claims (1)
する結晶缶内スラリー抜出し量制御方法において、上記
遠心分離により分離された母液をスラリー抜出しポンプ
の吸込側に戻づと共にその母液の戻し量を上記結晶缶内
スラリー８１ｒｔ１に応じて制御することを特徴とする
結晶缶内スラリー抜出し量制御方法。In a method for controlling the amount of slurry withdrawn from a crystal can, in which slurry is extracted from the crystal can and centrifuged to recover crystals, the mother liquor separated by the centrifugation is returned to the suction side of the slurry withdrawal pump, and the returned amount of the mother liquor is controlled as described above. A method for controlling the amount of slurry withdrawn from a crystal can, characterized in that the amount of slurry withdrawn from a crystal can is controlled according to the slurry 81rt1 in the crystal can.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13681683A JPS6028802A (en) | 1983-07-28 | 1983-07-28 | Controlling method of discharge of slurry in crystallizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13681683A JPS6028802A (en) | 1983-07-28 | 1983-07-28 | Controlling method of discharge of slurry in crystallizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6028802A true JPS6028802A (en) | 1985-02-14 |
Family
ID=15184169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13681683A Pending JPS6028802A (en) | 1983-07-28 | 1983-07-28 | Controlling method of discharge of slurry in crystallizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6028802A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011524804A (en) * | 2008-06-18 | 2011-09-08 | ジーイーエー メッソ ゲーエムベーハー | Method and apparatus for continuously producing crystals having a stable particle size distribution |
| CN109045745A (en) * | 2018-08-10 | 2018-12-21 | 国家***天津海水淡化与综合利用研究所 | A kind of band promotes the continuous vacuum equipment of crystallisation by cooling of water conservancy diversion |
-
1983
- 1983-07-28 JP JP13681683A patent/JPS6028802A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011524804A (en) * | 2008-06-18 | 2011-09-08 | ジーイーエー メッソ ゲーエムベーハー | Method and apparatus for continuously producing crystals having a stable particle size distribution |
| CN109045745A (en) * | 2018-08-10 | 2018-12-21 | 国家***天津海水淡化与综合利用研究所 | A kind of band promotes the continuous vacuum equipment of crystallisation by cooling of water conservancy diversion |
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