JP2003080004A - Liquid chemical injection apparatus - Google Patents
Liquid chemical injection apparatusInfo
- Publication number
- JP2003080004A JP2003080004A JP2001271684A JP2001271684A JP2003080004A JP 2003080004 A JP2003080004 A JP 2003080004A JP 2001271684 A JP2001271684 A JP 2001271684A JP 2001271684 A JP2001271684 A JP 2001271684A JP 2003080004 A JP2003080004 A JP 2003080004A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- chemical liquid
- horizontal
- vertical
- storage tank
- 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
【０００１】[0001]
【発明の属する技術分野】本発明は、ボイラにおける水
路にヒドラジン等の脱酸素剤を注入したり、上水道中に
次亜塩素酸ソーダを注入するなどの薬剤注入装置に関
し、特に、移送する途中で気泡が発生し易い薬液を注入
する薬液注入装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chemical injection device for injecting a deoxidizing agent such as hydrazine or the like into a waterway of a boiler or injecting sodium hypochlorite into waterworks, and particularly, during the transfer. The present invention relates to a chemical liquid injector that injects a chemical liquid that easily causes bubbles.
【０００２】[0002]
【従来の技術】移送する途中で気泡が発生し易い薬液を
注入する従来の薬液注入装置１は、図４に示すように、
薬液タンク２の下端に接続した配管３の途中を一旦立ち
上げて、この立ち上がり部分３ａの上端を脱泡タンク４
に側面から接続し、脱泡タンク４の下端に接続した配管
の下流側を立ち上げ、この立ち上がり部分３ｂの上端に
薬液注入ポンプ５の吸込み口を接続し、上記脱泡タンク
４の頂部に一端を接続したベントライン６の他端を薬液
タンク２の頂部に接続し、薬液タンク２から脱泡タンク
４までの間における配管中で薬液から気泡が発生した場
合には、その気泡を脱泡タンク４に集め、気泡が排除さ
れた薬液を脱泡タンク４の底部から導出して薬液注入ポ
ンプ５に供給し、これにより薬液注入ポンプ５のエアロ
ックを防止する構成である。そして、脱泡タンク４内の
ガスは、ベントライン６の途中に設けた弁７を開くこと
（常時開とする。）により薬液タンク２に戻す。2. Description of the Related Art A conventional chemical liquid injector 1 for injecting a chemical liquid in which bubbles are likely to be generated during transfer is shown in FIG.
The pipe 3 connected to the lower end of the chemical liquid tank 2 is temporarily raised in the middle thereof, and the upper end of the rising portion 3a is fixed to the defoaming tank 4
Is connected to the side surface of the degassing tank 4, and the downstream side of the pipe connected to the lower end of the defoaming tank 4 is started up. The suction port of the chemical liquid injection pump 5 is connected to the upper end of the rising portion 3b, and one end is connected to the top of the defoaming tank 4. The other end of the vent line 6 connected to is connected to the top of the chemical liquid tank 2, and when bubbles are generated from the chemical liquid in the pipe between the chemical liquid tank 2 and the defoaming tank 4, the bubbles are removed. 4, the chemical liquid from which bubbles have been removed is led out from the bottom of the defoaming tank 4 and supplied to the chemical liquid injection pump 5, whereby the air lock of the chemical liquid injection pump 5 is prevented. Then, the gas in the defoaming tank 4 is returned to the chemical liquid tank 2 by opening a valve 7 provided in the middle of the vent line 6 (normally open).
【０００３】[0003]
【発明が解決しようとする課題】従来の薬液注入装置
は、移送する際に発生する気泡を、配管途中に設けた脱
泡タンクによって回収する構成を採るので、途中の配管
を何度も屈曲する必要があり、配管作業が煩雑であっ
た。また、脱泡タンク薬液を薬液注入ポンプの間近に設
けることができないので、脱泡タンクから薬液注入ポン
プまでの配管を短くすることができず、この間で発生し
た気泡が配管の内周面に付着し、これらの気泡が次第に
成長し、遂には薬液注入ポンプに入ってエアロックを発
生することがあった。Since the conventional chemical liquid injector has a structure in which bubbles generated during transfer are collected by a defoaming tank provided in the middle of the pipe, the pipe in the middle is bent many times. It was necessary and the piping work was complicated. In addition, since the chemical solution in the defoaming tank cannot be installed close to the chemical solution injection pump, the piping from the defoaming tank to the chemical solution injection pump cannot be shortened, and the bubbles generated during this time adhere to the inner peripheral surface of the piping. However, these bubbles gradually grew and eventually entered the chemical injection pump to cause airlock.
【０００４】本発明は上記した事情に鑑み提案されたも
ので、その目的は、脱泡タンクを別途設けたり、薬液タ
ンクから薬液注入ポンプまでの間の配管を複雑に屈曲す
る必要がなく、薬液注入ポンプに気泡が入ってエアロッ
クを発生することを簡単な構造で防止できる薬液注入装
置を提供しようとするものである。The present invention has been proposed in view of the above circumstances, and an object thereof is to eliminate the need to separately provide a defoaming tank or to bend the piping from the chemical liquid tank to the chemical liquid injection pump in a complicated manner. An object of the present invention is to provide a chemical injection device capable of preventing air bubbles from entering the injection pump and generating an airlock with a simple structure.
【０００５】[0005]
【課題を解決するための手段】本発明は上記目的を達成
するために提案されたもので、請求項１に記載のもの
は、薬液を貯留する薬液貯留タンクと、該薬液貯留タン
クに一端が連通した第１配管と、該第１配管の他端に連
通した第２配管と、該第２配管の上端に吸込み口を連通
した状態で設けられた薬液注入ポンプと、を備えた薬液
注入装置であって、上記第１配管と第２配管との接続
は、第１配管を接続する横穿孔部と該横穿孔部に連通し
て第２配管を接続する縦穿孔部とを有する接続部材を介
して接続し、上方から縦穿孔部内に接続する第２配管の
下端部分を、横穿孔部と縦穿孔部との合流部分における
横穿孔部の上下高さの途中まで垂下させ、第２配管の下
端よりも高く位置する第１配管内を気泡貯留部とし、該
気泡貯留部に連通させてガス抜き手段を設けたことを特
徴とする薬液注入装置である。The present invention has been proposed in order to achieve the above object. According to a first aspect of the present invention, a chemical liquid storage tank for storing a chemical liquid and one end of the chemical liquid storage tank are provided. A chemical injection device including: a first pipe communicating with the second pipe; a second pipe communicating with the other end of the first pipe; and a chemical liquid injection pump provided with the suction port communicating with the upper end of the second pipe. The connection between the first pipe and the second pipe is a connecting member having a horizontal perforated portion connecting the first pipe and a vertical perforated portion communicating with the horizontal perforated portion and connecting the second pipe. The lower end portion of the second pipe connected to the inside of the vertical perforated portion from above is hung down to the middle of the vertical height of the horizontal perforated portion at the confluent portion of the horizontal perforated portion and the vertical perforated portion. The inside of the first pipe, which is located higher than the lower end, is defined as a bubble storage part, and is connected to the bubble storage part. A chemical liquid injector which characterized in that a venting means.
【０００６】請求項２に記載のものは、前記第１配管
は、薬液貯留タンクに一端が連通して少なくとも他端近
傍の下流側部分が横方向に延在する横配管であり、前記
第２配管は、横配管の他端に連通して縦方向に延在する
縦配管であることを特徴とする請求項１に記載の薬液注
入装置である。According to a second aspect of the present invention, the first pipe is a horizontal pipe in which one end communicates with the chemical liquid storage tank and at least a downstream side portion near the other end extends laterally. The chemical liquid injector according to claim 1, wherein the pipe is a vertical pipe that communicates with the other end of the horizontal pipe and extends in the vertical direction.
【０００７】請求項３に記載のものは、第２配管の下端
部分を横穿孔部の中央まで垂下させたことを特徴とする
請求項１または２に記載の薬液注入装置である。A third aspect of the present invention is the chemical liquid injector according to the first or second aspect, wherein the lower end portion of the second pipe is hung down to the center of the lateral perforated portion.
【０００８】請求項４に記載のものは、前記ガス抜き手
段は、下端を気泡貯留部に接続して上端を薬液貯留タン
クに接続して、気泡貯留部に溜まったガスを薬液貯留タ
ンクの気相部に戻すベントラインで構成したことを特徴
とする請求項１から３のいずれかに記載の薬液注入装置
である。According to a fourth aspect of the present invention, in the gas venting means, the lower end is connected to the bubble storage portion and the upper end is connected to the chemical liquid storage tank, and the gas accumulated in the bubble storage portion is discharged to the gas of the chemical liquid storage tank. The chemical liquid injector according to any one of claims 1 to 3, wherein the vent line is configured to return to the phase portion.
【０００９】請求項５に記載のものは、前記ガス抜き手
段は、下端を気泡貯留部に接続して上端を大気開放した
大気開放管により構成し、この大気開放管に大気開放弁
を設けたことを特徴とする請求項１から４のいずれかに
記載の薬液注入装置である。According to a fifth aspect of the present invention, the degassing means is composed of an atmosphere opening pipe whose lower end is connected to the bubble storing portion and whose upper end is open to the atmosphere, and the atmosphere opening pipe is provided with an atmosphere opening valve. The chemical liquid injector according to any one of claims 1 to 4, wherein:
【００１０】請求項６に記載のものは、前記大気開放弁
はタイマー作動式であって、予め設定した時間に大気開
放することを特徴とする請求項５に記載の薬液注入装置
である。According to a sixth aspect of the present invention, there is provided the chemical liquid injector according to the fifth aspect, wherein the atmosphere release valve is a timer-operated type and the atmosphere is opened at a preset time.
【００１１】請求項７に記載のものは、前記接続部材に
接続した第１配管は、当該接続部材に向けて下り傾斜し
ていることを特徴とする請求項１から６のいずれかに記
載の薬液注入装置である。According to a seventh aspect of the present invention, the first pipe connected to the connecting member is inclined downward toward the connecting member. It is a chemical injection device.
【００１２】[0012]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。図１は薬液注入装置１０の第１実
施形態の概略構成図、図２は脱泡器として機能する部分
の断面図である。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a first embodiment of a chemical liquid injector 10, and FIG. 2 is a sectional view of a portion functioning as a defoamer.
【００１３】この薬液注入装置１０は、薬液を貯留する
薬液貯留タンク１１と、該薬液貯留タンク１１内の薬液
を導出する導出管１２と、薬液をボイラ等の薬液注入対
象の所定の部位に注入する薬液注入ポンプ１３と、導出
管１２の途中から分岐して薬液中から発生したガスを薬
液貯留タンク１１に戻すベントライン１４とから概略構
成されている。なお、本実施形態では、導出管１２に使
用する管材とベントライン１４に使用する管材とは、同
じ太さの管材を使用しているが、本発明はこれに限定さ
れるものではなく、例えばベントライン１４には導出管
１２よりも細い管材を使用してもよい。This chemical liquid injection device 10 injects a chemical liquid storage tank 11 for storing a chemical liquid, a lead-out pipe 12 for leading out the chemical liquid in the chemical liquid storage tank 11, and a chemical liquid into a predetermined portion such as a boiler to which the chemical liquid is injected. And a vent line 14 that branches from the middle of the outlet pipe 12 and returns the gas generated from the chemical liquid to the chemical liquid storage tank 11. In the present embodiment, the pipe material used for the outlet pipe 12 and the pipe material used for the vent line 14 have the same thickness, but the present invention is not limited to this, and for example, The vent line 14 may use a pipe material thinner than the outlet pipe 12.
【００１４】導出管１２は、薬液貯留タンク１１の底部
に一端が連通して途中から横方向に延在する横配管１５
（本発明の第１配管に相当）と、該横配管１５の他端に
連通して縦方向に延在する縦配管１６（本発明の第２配
管に相当）とから構成され、縦配管１６の上端に吸込み
口を連通した状態で薬液注入ポンプ１３を設ける。な
お、薬液注入ポンプ１３としては、吐出量が少なくても
その量を正確に変化させることができる可変ストローク
タイプの往復動ポンプやダイアフラムタイプのポンプが
好適に用いられる。The outlet pipe 12 has one end communicating with the bottom of the chemical storage tank 11 and a lateral pipe 15 extending laterally from the middle.
(Corresponding to the first pipe of the present invention) and vertical pipe 16 (corresponding to the second pipe of the present invention) communicating with the other end of the horizontal pipe 15 and extending in the vertical direction. The chemical liquid injection pump 13 is provided with the suction port communicating with the upper end of the. As the chemical liquid injection pump 13, a variable stroke type reciprocating pump or a diaphragm type pump that can accurately change the discharge amount even if the discharge amount is small is preferably used.
【００１５】上記横配管１５と縦配管１６との接続は、
横配管１５を接続する横穿孔部と該横穿孔部に連通して
縦配管１６を接続する縦穿孔部とを有する接続ブロック
１７を介して接続し、本実施形態ではこの接続ブロック
１７からベントライン１４を分岐する。なお、接続ブロ
ック１７が本発明の接続部材として機能する部材である
が、接続部材はブロックに限定されるものではなく、例
えば中空ボックス状でもよい。The connection between the horizontal pipe 15 and the vertical pipe 16 is as follows.
Connection is made via a connection block 17 having a horizontal perforated portion for connecting the horizontal pipe 15 and a vertical perforated portion for connecting the vertical pipe 16 in communication with the horizontal perforated portion. In the present embodiment, the connection line 17 is connected to the vent line. Branch 14 Although the connection block 17 is a member that functions as a connection member of the present invention, the connection member is not limited to the block and may be, for example, a hollow box shape.
【００１６】前記接続ブロック１７は、図２に示すよう
に、横向き円柱状の金属製ブロックであり、両円形端面
から横配管１５とベントライン１４の管材の外径が丁度
嵌合する太径孔を途中まで穿孔するとともに、両太径孔
の間を横配管１５の内径と同じ大きさの細径孔を穿孔
し、これにより左右を貫通する状態で横穿孔部２０を形
成し、この横穿孔部２０の長手方向中央に上方から交差
して連通する状態で縦配管１６の外径が丁度嵌合する大
きさの縦穿孔部２１を穿設してある。したがって、横穿
孔部２０の一方の開口から横配管１５の端部を嵌装し、
他方の開口からベントライン１４の管材の端部を嵌装し
て奥まで十分に入れると、横配管１５の内周面とベント
ライン１４配管の内周面と細径孔の内周面との三者が同
一内径となって円滑な連続内周面を形成する。そして、
この接続ブロック１７の縦穿孔部２１内に縦配管１６の
下端部分を嵌装すると、横配管１５と縦配管１６とベン
トライン１４配管との３本の配管が連通する。As shown in FIG. 2, the connection block 17 is a horizontally-oriented columnar metal block, and is a large-diameter hole into which the outer diameters of the pipe members of the horizontal pipe 15 and the vent line 14 fit exactly from both circular end faces. And a small-diameter hole having the same size as the inner diameter of the lateral pipe 15 is formed between the large-diameter holes, thereby forming a lateral perforated portion 20 in a state of penetrating left and right, and this lateral perforation is performed. A vertical perforation portion 21 having a size to which the outer diameter of the vertical pipe 16 is just fitted is formed at the center of the portion 20 in the longitudinal direction so as to intersect and communicate from above. Therefore, the end of the horizontal pipe 15 is fitted from one opening of the horizontal perforated portion 20,
When the end of the pipe material of the vent line 14 is fitted from the other opening and is fully inserted into the interior, the inner peripheral surface of the lateral pipe 15, the inner peripheral surface of the vent line 14 and the inner peripheral surface of the small diameter hole are separated. The three have the same inner diameter and form a smooth continuous inner peripheral surface. And
When the lower end portion of the vertical pipe 16 is fitted in the vertical drilling portion 21 of the connection block 17, the three pipes of the horizontal pipe 15, the vertical pipe 16 and the vent line 14 are communicated with each other.
【００１７】また、本実施形態では、縦配管１６を上方
から縦穿孔部２１内に接続する場合に、縦配管１６の下
部外径を横穿孔部２０よりも縮径し、この縦配管１６の
下端部分を、横穿孔部２０と縦穿孔部２１との合流部分
における横穿孔部２０の上下高さ、すなわち細径孔の途
中、具体的には細径孔（横穿孔部２０）の内径のほぼ中
央まで垂下させ、この垂下部分（縮径部分）１６´によ
る区画により、縦配管１６の下端よりも高く位置する横
配管１５内の空間及びベントライン１４配管内の空間を
気泡貯留部２２とする。なお、前記したように、垂下部
分１６´を横穿孔部２０よりも縮径したので、この垂下
部分（縮径部分）１６´の外周周辺には空間が形成され
る。また、縦配管１６の下端部分の外径をその上部より
も小さくするには、図２（ａ）に示すように、管材の肉
厚を切削などにより薄くしてもよいし、ネッキング等の
塑性加工を施してもよい。さらに、本実施形態では、垂
下部分１６´の外周周辺の空間は、垂下部分１６´全体
を縮径することにより形成したが、これに限らず、横配
管１５内の気泡貯留部２２とベントライン１４内の気泡
貯留部２２とを連通し、且つ、縦配管１６内とは連通し
ないように連通空間を形成できればよく、例えば、垂下
部分のうち一部分のみを縮径することにより連通空間を
形成してもよいし、垂下部分の表面に溝を形成したり、
配管肉厚部に貫通孔を設けたりして連通空間を設けても
よい。Further, in the present embodiment, when the vertical pipe 16 is connected to the inside of the vertical drilling portion 21, the lower outer diameter of the vertical pipe 16 is reduced to be smaller than that of the horizontal drilling portion 20. The lower end is defined by the vertical height of the horizontal perforated portion 20 at the confluence of the horizontal perforated portion 20 and the vertical perforated portion 21, that is, in the middle of the small diameter hole, specifically, the inner diameter of the small diameter hole (horizontal perforated portion 20). The space in the horizontal pipe 15 and the space in the vent line 14 which are located higher than the lower end of the vertical pipe 16 is defined as the bubble storage portion 22 by the hanging portion (reduced diameter portion) 16 '. To do. As described above, since the diameter of the hanging portion 16 'is smaller than that of the lateral perforated portion 20, a space is formed around the outer periphery of the hanging portion (diameter-reduced portion) 16'. Further, in order to make the outer diameter of the lower end portion of the vertical pipe 16 smaller than that of the upper portion thereof, as shown in FIG. 2A, the wall thickness of the pipe material may be reduced by cutting or the like, or plasticity such as necking may be applied. It may be processed. Further, in the present embodiment, the space around the outer periphery of the hanging portion 16 ′ is formed by reducing the diameter of the entire hanging portion 16 ′, but the present invention is not limited to this, and the bubble storage portion 22 and the vent line in the horizontal pipe 15 are not limited thereto. It suffices if the communication space can be formed so as to communicate with the bubble reservoir 22 in 14 and not communicate with the vertical pipe 16. For example, the communication space is formed by reducing only a part of the hanging portion. Or you can form a groove on the surface of the hanging part,
A communication space may be provided by providing a through hole in the thick wall portion of the pipe.
【００１８】この様な構成からなる薬液注入装置１０に
おいては、通常、導出管１２の途中の弁２３を開いた状
態で薬液注入ポンプ１３を作動すると、薬液貯留タンク
１１内に貯留した薬液（例えば、ヒドラジン）を、導出
管１２を介して導出して薬液注入ポンプ１３に供給し、
薬液注入ポンプ１３の吐出口に接続した吐出管を介して
注入対象物の所定の部位（例えば、ボイラの水路）に薬
液を所定量注入することができる。そして、薬液貯留タ
ンク１１から導出された薬液が導出管１２内を移送され
る際にガス（例えば、窒素ガス）を発生した場合、この
ガスは小さな気泡となって導出管１２の内周面に付着す
る。そして、この小さな気泡が薬液の移送により下流側
に流されても、接続ブロック１７内に入ると、縦配管１
６の垂下部分１６´によって縦配管１６の内部に流入す
ることが阻止される。したがって、薬液が横配管１５内
を流れる途中で発生したガスが縦配管１６内に流れ込ん
で薬液注入ポンプ１３に到達することを防止することが
でき、これにより薬液注入ポンプ１３が気泡を吸い込ん
でエアロックを発生するというトラブルを未然に防止す
ることができる。In the liquid medicine injection device 10 having such a structure, when the liquid medicine injection pump 13 is normally operated with the valve 23 in the middle of the outlet pipe 12 open, the liquid medicine stored in the liquid medicine storage tank 11 (for example, , Hydrazine) is led out through the lead-out pipe 12 and supplied to the chemical injection pump 13.
It is possible to inject a predetermined amount of the chemical liquid into a predetermined portion of the injection target (for example, a water channel of the boiler) via a discharge pipe connected to the discharge port of the chemical liquid injection pump 13. Then, when a gas (for example, nitrogen gas) is generated when the chemical liquid discharged from the chemical liquid storage tank 11 is transferred in the discharge pipe 12, this gas becomes small bubbles and is formed on the inner peripheral surface of the discharge pipe 12. Adhere to. Then, even if these small bubbles are made to flow to the downstream side by the transfer of the chemical liquid, if they enter the connection block 17, the vertical pipe 1
The hanging portion 16 ′ of 6 prevents the flow into the vertical pipe 16. Therefore, it is possible to prevent the gas generated during the flow of the chemical liquid in the horizontal pipe 15 from flowing into the vertical pipe 16 and reaching the chemical liquid injecting pump 13, whereby the chemical liquid injecting pump 13 sucks air bubbles and air. It is possible to prevent a trouble that a lock is generated.
【００１９】そして、縦配管１６の垂下部分１６´によ
って横配管１５内に流入することが阻止された気泡は、
横配管１５内の上部、すなわち気泡貯留部２２内に徐々
に溜まり、小さな気泡が複数集まって次第に大きな気泡
になる。また、横配管１５内の気泡貯留部２２内に気泡
がある程度溜まると、この気泡は縦配管１６の垂下部分
（縮径部分）１６´周辺の空間を回りこんでベントライ
ン１４の管材側の気泡貯留部２２内に移動して溜まる。
すなわち、本実施形態では、ガス抜き手段としてのベン
トライン１４の下端は、接続ブロック１７の横穿孔部２
０を介して横配管１５の気泡貯留部２２と接続されてい
ることとなり、横配管１５の気泡貯留部２２内に溜まっ
た気泡がベントライン１４内に円滑に移動する。The bubbles which are prevented from flowing into the horizontal pipe 15 by the hanging portion 16 'of the vertical pipe 16 are
The air bubbles are gradually accumulated in the upper portion of the lateral pipe 15, that is, in the air bubble storage portion 22, and a plurality of small air bubbles are collected to gradually become large air bubbles. Further, when some air bubbles are accumulated in the air bubble storage portion 22 in the horizontal pipe 15, the air bubbles circulate in the space around the depending portion (diameter-reduced portion) 16 ′ of the vertical pipe 16 and bubbles on the pipe material side of the vent line 14. It moves and accumulates in the storage part 22.
That is, in the present embodiment, the lower end of the vent line 14 as the gas venting means has the lateral perforated portion 2 of the connection block 17.
Since it is connected to the bubble storage portion 22 of the horizontal pipe 15 via 0, the bubbles accumulated in the bubble storage portion 22 of the horizontal pipe 15 smoothly move into the vent line 14.
【００２０】上記管材側の気泡貯留部２２内にある程度
の気泡が溜まると、この気泡はベントライン１４の縦管
材を通って薬液貯留タンク１１内に戻る。したがって、
気泡貯留部２２内にガスが満杯となって溢れたガスが縦
配管１６内に流入することを防止できる。なお、ベント
ライン１４は、薬液貯留タンク１１の頂部、あるいは上
部側面に接続されており、いずれの接続部位においても
気泡貯留部２２内に溜まったガスを薬液貯留タンク１１
の気相部に戻すことができる。When a certain amount of air bubbles are accumulated in the air bubble storage portion 22 on the side of the pipe material, the air bubbles return to the chemical liquid storage tank 11 through the vertical pipe material of the vent line 14. Therefore,
It is possible to prevent the overflow of gas from flowing into the vertical pipe 16 when the bubble storage portion 22 is filled with gas. The vent line 14 is connected to the top portion or the upper side surface of the chemical liquid storage tank 11, and the gas accumulated in the bubble storage portion 22 is stored in the chemical liquid storage tank 11 at any connection site.
Can be returned to the gas phase.
【００２１】なお、ベントライン１４を介して気泡貯留
部２２と薬液貯留タンク１１とを常時連通しておいても
よいが、ベントライン１４の途中に開閉弁２４を設け、
この開閉弁２４を開いた時に気泡貯留部２２内のガスを
薬液貯留タンク１１内に戻すように構成しても良い。The bubble storage portion 22 and the chemical liquid storage tank 11 may be always communicated with each other via the vent line 14, but an opening / closing valve 24 is provided in the middle of the vent line 14.
The gas in the bubble storage portion 22 may be returned to the chemical liquid storage tank 11 when the opening / closing valve 24 is opened.
【００２２】また、前記実施形態においては、ガス抜き
手段として薬液貯留タンク１１に連通するベントライン
１４を設けたが、このガス抜き手段はこれに限定される
ものではなく、気泡貯留部２２内に溜まったガスを抜く
機能を備えていればよい。例えば、薬液から発生するガ
スが無害であって大気中に放出しても問題が生じない場
合には、大気開放管の下端を気泡貯留部２２に接続して
上端を大気開放し、この大気開放管に大気開放弁を設け
てもよい（図示せず）。そして、この場合、大気開放弁
にタイマー作動式弁を用いると、タイマーに設定した所
定時間の経過により自動的に大気開放弁を開くことがで
き、これにより気泡貯留部２２内に溜まったガスを定期
的に抜いて大気中に放出することができる。一方、薬液
からの発生ガスが有害であって大気中に放出することが
困難な場合は、触媒充填室（図示せず）を気泡貯留部２
２に連通し、ガスを触媒に接触させることによって無害
ガス化分解したり、或いはスクラバ（図示せず）を気泡
貯留部２２に連通し、このスクラバ内にてガス中の有害
物質を水に吸着させる等して除去したりした後、無害と
なったガスのみを大気中に放出してもよい。Further, in the above-described embodiment, the vent line 14 communicating with the chemical liquid storage tank 11 is provided as the gas venting means, but the venting means is not limited to this, and the gas venting portion 22 may be provided. It only has to have a function of removing the accumulated gas. For example, when the gas generated from the chemical solution is harmless and does not cause a problem even if it is released into the atmosphere, the lower end of the atmosphere open pipe is connected to the bubble storage section 22 and the upper end is opened to the atmosphere. The tube may be provided with an atmosphere release valve (not shown). Then, in this case, if a timer-operated valve is used as the atmosphere release valve, the atmosphere release valve can be automatically opened after the elapse of a predetermined time set in the timer, whereby the gas accumulated in the bubble reservoir 22 can be removed. It can be periodically withdrawn and released into the atmosphere. On the other hand, when the generated gas from the chemical solution is harmful and difficult to release into the atmosphere, the catalyst filling chamber (not shown) is moved to the bubble storage section 2.
No. 2 is connected to the catalyst, and is harmlessly gasified and decomposed by bringing the gas into contact with a catalyst, or a scrubber (not shown) is connected to the bubble storage section 22, and harmful substances in the gas are adsorbed to water in the scrubber. After removing it by, for example, removing only harmless gas, it may be released into the atmosphere.
【００２３】また、図１に示す実施形態においては、横
配管１５を水平に配管したが、この横配管１５を接続ブ
ロック１７に向けて下り傾斜させてもよい。このように
横配管１５を傾斜させると、気泡貯留部２２内に溜まっ
た気泡が浮力により下流側に戻されるので、縦配管１６
内に気泡が流入することを一層確実に防止できる。Further, in the embodiment shown in FIG. 1, the horizontal pipe 15 is horizontally piped, but the horizontal pipe 15 may be inclined downward toward the connection block 17. When the horizontal pipe 15 is tilted in this way, the bubbles accumulated in the bubble storage portion 22 are returned to the downstream side by buoyancy, so that the vertical pipe 16 is provided.
It is possible to more reliably prevent bubbles from flowing into the inside.
【００２４】そして、図３に示すように、接続ブロック
１７に接続したベントライン１４の管材も同様にして接
続ブロック１７に向けて下り傾斜させると、横配管１５
上部の気泡貯留部２２内に溜まった気泡が縦配管１６の
垂下部分１６´を回りこんでベントライン１４内の気泡
貯留部２２内に移動し、浮力によりベントライン１４の
縦方向の管材内に移動し易くなり、気泡貯留部２２内の
ガスが薬液貯留タンク１１に一層戻り易くなる。Then, as shown in FIG. 3, when the pipe material of the vent line 14 connected to the connection block 17 is also inclined downward toward the connection block 17, the horizontal pipe 15
The air bubbles accumulated in the upper air bubble storage portion 22 move around the hanging portion 16 ′ of the vertical pipe 16 and move into the air bubble storage portion 22 in the vent line 14, and due to the buoyancy force, enter the pipe material in the vertical direction of the vent line 14. It becomes easier to move, and the gas in the bubble storage portion 22 becomes easier to return to the chemical liquid storage tank 11.
【００２５】なお、前記実施形態においては、ベントラ
イン１４の下端を接続ブロック１７の横穿孔部２０に接
続したが、本発明におけるガス抜き手段はこれに限定さ
れるものではなく、気泡貯留部に連通して、気泡貯留部
内のガスを逃がす機能を備えればどのような構成でもよ
い。例えば、横配管１５の途中において上方から接続し
てもよい。In the above embodiment, the lower end of the vent line 14 is connected to the lateral perforated portion 20 of the connection block 17, but the degassing means in the present invention is not limited to this, and it is not limited to the bubble storage portion. Any configuration may be used as long as it has a function of communicating and letting the gas in the bubble storage portion escape. For example, it may be connected from above in the middle of the horizontal pipe 15.
【００２６】[0026]
【発明の効果】以上説明したように本発明によれば、以
下の効果を奏する。請求項１の発明によれば、一端が薬
液貯留タンクに連通した第１配管と、該第１配管の他端
に連通して縦方向に延在する第２配管と、該第２配管の
上端に吸込み口を連通した状態で設けられた薬液注入ポ
ンプとを備え、上記第１配管と第２配管との接続は、横
穿孔部と縦穿孔部とを有する接続部材を介して接続し、
上方から縦穿孔部内に接続する第２配管の下端部分を、
横穿孔部と縦穿孔部との合流部分における横穿孔部の上
下高さの途中まで垂下させ、第２配管の下端よりも高く
位置する第１配管内を気泡貯留部としたので、第２配管
の下端垂下部分により、第１配管内で発生したガスの気
泡が第２配管内に流入することを阻止することができ
る。したがって、薬液注入ポンプがエアロックすること
を防止できる。そして、気泡貯留部に溜まったガスはガ
ス抜き手段により抜くことができるので、気泡貯留部に
溜まったガスが溢れて第２配管に流入することを防止で
きる。As described above, the present invention has the following effects. According to the invention of claim 1, a first pipe having one end communicating with the chemical liquid storage tank, a second pipe communicating with the other end of the first pipe and extending in the vertical direction, and an upper end of the second pipe. And a chemical injection pump provided in a state where the suction port is in communication with the first pipe and the second pipe are connected via a connecting member having a horizontal perforation portion and a vertical perforation portion,
The lower end portion of the second pipe connected from above into the vertical drilling portion,
Since the first pipe located higher than the lower end of the second pipe is made to be a bubble storage part, the second perforation part is hung down to the middle of the vertical height of the horizontal perforation part at the confluence of the horizontal perforation part and the vertical perforation part. By the lower end hanging portion of the above, it is possible to prevent gas bubbles generated in the first pipe from flowing into the second pipe. Therefore, it is possible to prevent the chemical injection pump from airlocking. Since the gas accumulated in the bubble reservoir can be removed by the gas releasing means, it is possible to prevent the gas accumulated in the bubble reservoir from overflowing and flowing into the second pipe.
【００２７】また、液圧ポンプに薬液を供給する第２配
管の下端に脱泡器として機能する上記垂下部分を位置さ
せて、気泡が発生し得る第１配管のほぼ全長の天井部分
を気泡貯留部として機能させることができるので、脱泡
器を薬液注入ポンプに近づけて配置したのと同等とする
ことができる。したがって、薬液注入ポンプに吸入され
る気泡を最小限に抑えることができ、エアロックの発生
を抑制することができる。さらに、第２配管の下端の位
置を工夫するだけでエアロックを防止することができる
ので、脱泡器のための特別な部品を付加したり、余分な
加工を施す必要もなく、構造及び製造が簡単である。Further, the drooping portion functioning as a defoaming device is located at the lower end of the second pipe for supplying the liquid chemical to the hydraulic pump, and the substantially full-length ceiling portion of the first pipe where bubbles can be generated is pooled with bubbles. Since it can be made to function as a part, it can be equivalent to the defoaming device being arranged close to the chemical liquid injection pump. Therefore, the bubbles sucked into the chemical liquid injection pump can be minimized, and the occurrence of airlock can be suppressed. Furthermore, since it is possible to prevent the airlock simply by devising the position of the lower end of the second pipe, there is no need to add special parts for the defoamer or to perform extra processing, and the structure and manufacturing Is easy.
【００２８】請求項２に記載の発明は、第１配管が、薬
液貯留タンクに一端が連通して少なくとも他端近傍の下
流側部分が横方向に延在する横配管であり、第２配管
が、横配管の他端に連通して縦方向に延在する縦配管で
あるので、第１配管を接続部材近傍において屈曲させる
ことなく接続部材の横穿孔部に接続することができ、ま
た、第２配管も、接続部材近傍において屈曲させること
なく接続部材の縦穿孔部に接続することができる。According to a second aspect of the present invention, the first pipe is a horizontal pipe in which one end communicates with the chemical liquid storage tank and at least the downstream portion near the other end extends in the lateral direction, and the second pipe is Since it is a vertical pipe that communicates with the other end of the horizontal pipe and extends in the vertical direction, it is possible to connect the first pipe to the horizontal perforated portion of the connection member without bending the first pipe in the vicinity of the connection member. The two pipes can also be connected to the vertical perforated portion of the connecting member without bending in the vicinity of the connecting member.
【００２９】請求項３の発明は、第２配管の下端部分を
横穿孔部の中央まで垂下させたので、気泡貯留部の容量
を十分に確保することができる。したがって、薬液注入
ポンプがエアロックを発生することを確実に防止でき
る。According to the third aspect of the invention, since the lower end portion of the second pipe is hung down to the center of the lateral perforated portion, it is possible to secure a sufficient capacity of the bubble storage portion. Therefore, it is possible to reliably prevent the chemical injection pump from generating an airlock.
【００３０】請求項４の発明は、ガス抜き手段が、下端
を気泡貯留部に接続して上端を薬液貯留タンクに接続し
て、気泡貯留部に溜まったガスを薬液貯留タンクの気相
部に戻すベントラインで構成されるので、大気中に放出
することができないガスを発生する薬液を使用する場合
であっても実施することができる。In the invention of claim 4, the gas venting means connects the lower end to the bubble storage portion and the upper end to the chemical liquid storage tank, and the gas accumulated in the bubble storage portion is supplied to the gas phase portion of the chemical liquid storage tank. Since it is composed of a returning vent line, it can be carried out even when using a chemical solution that generates a gas that cannot be released into the atmosphere.
【００３１】請求項５の発明は、ガス抜き手段が、下端
を気泡貯留部に接続して上端を大気開放した大気開放管
により構成され、この大気開放管に大気開放弁を設けた
ので、発生したガスを必要に応じて大気中に放出ことが
できるばかりでなく、薬液貯留タンク内の薬液が空気に
よって劣化することを防止できる。In the invention of claim 5, the degassing means is constituted by an atmosphere opening pipe whose lower end is connected to the bubble storing portion and whose upper end is open to the atmosphere, and this atmosphere opening pipe is provided with an atmosphere opening valve. Not only can the generated gas be released into the atmosphere as necessary, but also the chemical liquid in the chemical liquid storage tank can be prevented from being deteriorated by the air.
【００３２】請求項６の発明は、大気開放弁がタイマー
作動式であって、予め設定した時間に大気開放するの
で、手間がかからず確実にガス抜きができる。According to the sixth aspect of the present invention, the atmosphere release valve is a timer-operated type, and the atmosphere is opened at a preset time. Therefore, it is possible to surely perform degassing without trouble.
【００３３】請求項７の発明は、接続部材に接続した第
１配管が接続部材に向けて下り傾斜しているので、気泡
が浮力により上流側に戻され、第２配管内に気泡が入り
込むことを一層確実に防止できる。According to the invention of claim 7, since the first pipe connected to the connecting member is inclined downward toward the connecting member, the bubbles are returned to the upstream side by the buoyancy and the bubbles enter the second pipe. Can be prevented more reliably.
【図１】薬液注入装置の概略構成図である。FIG. 1 is a schematic configuration diagram of a chemical injection device.
【図２】（ａ）は脱泡器として機能する接続ブロックの
断面図、（ｂ）は接続ブロックの右側面図である。2A is a sectional view of a connection block that functions as a defoamer, and FIG. 2B is a right side view of the connection block.
【図３】ベントラインの管材を傾斜させて接続した接続
ブロックの他の実施形態の断面図である。FIG. 3 is a cross-sectional view of another embodiment of a connection block in which pipe materials of a vent line are inclined and connected.
【図４】従来の薬液注入装置の概略構成図である。FIG. 4 is a schematic configuration diagram of a conventional chemical injection device.
１０ 薬液注入装置 １１ 薬液貯留タンク １２ 導出管 １３ 薬液注入ポンプ １４ ベントライン １５ 横配管（第１配管） １６ 縦配管（第２配管） １６´ 垂下部分（縮径部分） １７ 接続部材としての接続ブロック ２０ 横穿孔部 ２１ 縦穿孔部 ２２ 気泡貯留部 ２３ 弁 ２４ 開閉弁 10 Chemical injection device 11 Chemical storage tank 12 Outlet pipe 13 Chemical injection pump 14 Bent line 15 Horizontal piping (first piping) 16 Vertical piping (second piping) 16 'Hanging part (reduced diameter part) 17 Connection block as connection member 20 Horizontal perforation part 21 Vertical Perforation 22 Bubble storage 23 valves 24 on-off valve
Claims (7)
た薬液注入ポンプと、を備えた薬液注入装置であって、 上記第１配管と第２配管との接続は、第１配管を接続す
る横穿孔部と該横穿孔部に連通して第２配管を接続する
縦穿孔部とを有する接続部材を介して接続し、 上方から縦穿孔部内に接続する第２配管の下端部分を、
横穿孔部と縦穿孔部との合流部分における横穿孔部の上
下高さの途中まで垂下させ、 第２配管の下端よりも高く位置する第１配管内を気泡貯
留部とし、該気泡貯留部に連通させてガス抜き手段を設
けたことを特徴とする薬液注入装置。1. A chemical liquid storage tank for storing a chemical liquid, a first pipe having one end communicating with the chemical liquid storage tank, a second pipe communicating with the other end of the first pipe, and an upper end of the second pipe. A chemical injection device provided with a chemical injection pump provided in a state where the suction port is in communication, wherein the first pipe and the second pipe are connected to each other by a horizontal perforation part that connects the first pipe and the horizontal perforation part. The lower end portion of the second pipe connected to the inside of the vertical drilling portion from above is connected via a connecting member having a vertical drilling portion that communicates with the drilling portion and connects the second pipe,
The horizontal perforated portion at the confluent portion of the horizontal perforated portion and the vertical perforated portion is hung down to the middle of the vertical height, and the inside of the first pipe positioned higher than the lower end of the second pipe is used as the bubble storage portion, and A chemical injection device characterized in that a gas venting means is provided in communication therewith.
が連通して少なくとも他端近傍の下流側部分が横方向に
延在する横配管であり、 前記第２配管は、横配管の他端に連通して縦方向に延在
する縦配管であることを特徴とする請求項１に記載の薬
液注入装置。2. The first pipe is a horizontal pipe in which one end communicates with a chemical liquid storage tank and at least a downstream side portion near the other end extends laterally, and the second pipe is a horizontal pipe other than the horizontal pipe. The chemical liquid injector according to claim 1, wherein the chemical liquid injector is a vertical pipe that communicates with an end and extends in the vertical direction.
で垂下させたことを特徴とする請求項１または２に記載
の薬液注入装置。3. The chemical injection device according to claim 1, wherein the lower end portion of the second pipe is hung down to the center of the lateral perforation portion.
に接続して上端を薬液貯留タンクに接続して、気泡貯留
部に溜まったガスを薬液貯留タンクの気相部に戻すベン
トラインで構成したことを特徴とする請求項１から３の
いずれかに記載の薬液注入装置。4. The venting means is a vent line having a lower end connected to a bubble storage portion and an upper end connected to a chemical liquid storage tank, for returning gas accumulated in the bubble storage portion to a gas phase portion of the chemical liquid storage tank. The chemical liquid injector according to any one of claims 1 to 3, which is configured.
に接続して上端を大気開放した大気開放管により構成
し、この大気開放管に大気開放弁を設けたことを特徴と
する請求項１から４のいずれかに記載の薬液注入装置。5. The gas venting means is constituted by an atmosphere opening pipe having a lower end connected to a bubble storage portion and an upper end opening to the atmosphere, and the atmosphere opening pipe is provided with an atmosphere opening valve. 5. The chemical liquid injector according to any one of 1 to 4.
て、予め設定した時間に大気開放することを特徴とする
請求項５に記載の薬液注入装置。6. The chemical injection device according to claim 5, wherein the atmosphere opening valve is a timer-operated type, and opens to the atmosphere at a preset time.
該接続部材に向けて下り傾斜していることを特徴とする
請求項１から６のいずれかに記載の薬液注入装置。7. The chemical liquid injector according to claim 1, wherein the first pipe connected to the connecting member is inclined downward toward the connecting member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001271684A JP2003080004A (en) | 2001-09-07 | 2001-09-07 | Liquid chemical injection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001271684A JP2003080004A (en) | 2001-09-07 | 2001-09-07 | Liquid chemical injection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003080004A true JP2003080004A (en) | 2003-03-18 |
Family
ID=19097160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001271684A Pending JP2003080004A (en) | 2001-09-07 | 2001-09-07 | Liquid chemical injection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003080004A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008093554A (en) * | 2006-10-11 | 2008-04-24 | Suntory Ltd | Apparatus for supplying liquid chemical |
| JP2010121549A (en) * | 2008-11-20 | 2010-06-03 | Suiden Co Ltd | Reciprocating pump |
| JP2012245468A (en) * | 2011-05-27 | 2012-12-13 | Kawamoto Pump Mfg Co Ltd | Gas-liquid separator and sterilizer |
| US10107491B2 (en) | 2014-03-28 | 2018-10-23 | Mitsubishi Hitachi Power Systems, Ltd. | Injection device and steam turbine system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0212078U (en) * | 1988-07-07 | 1990-01-25 |
-
2001
- 2001-09-07 JP JP2001271684A patent/JP2003080004A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0212078U (en) * | 1988-07-07 | 1990-01-25 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008093554A (en) * | 2006-10-11 | 2008-04-24 | Suntory Ltd | Apparatus for supplying liquid chemical |
| JP2010121549A (en) * | 2008-11-20 | 2010-06-03 | Suiden Co Ltd | Reciprocating pump |
| JP2012245468A (en) * | 2011-05-27 | 2012-12-13 | Kawamoto Pump Mfg Co Ltd | Gas-liquid separator and sterilizer |
| US10107491B2 (en) | 2014-03-28 | 2018-10-23 | Mitsubishi Hitachi Power Systems, Ltd. | Injection device and steam turbine system |
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