JP6054770B2

JP6054770B2 - Soft water supply equipment

Info

Publication number: JP6054770B2
Application number: JP2013031462A
Authority: JP
Inventors: 守森本
Original assignee: 株式会社サムソン
Priority date: 2013-02-20
Filing date: 2013-02-20
Publication date: 2016-12-27
Anticipated expiration: 2033-02-20
Also published as: JP2014159019A

Description

本発明は、軟水使用機器への軟水の供給を行う軟水供給設備に関するものである。 The present invention relates to a soft water supply facility for supplying soft water to a device using soft water.

特開２０１０−３８３８５公報に記載があるように、ボイラの給水経路には、原水中に含まれているカルシウムイオンやマグネシウムイオンなどの硬度成分を除去する軟水装置を設けておき、硬度成分を除去した軟水をボイラへ供給するようにしている。特開２０１０−３８３８５公報では、軟水装置で硬度成分の除去を行い、脱酸素装置で脱気を行った軟水を補給水タンク（軟水タンク）にためている。補給水タンクには水位検出器を設けておき、補給水タンク内の水位が下限水位を下回ると、軟水装置からの補給水タンクへの軟水供給を行い、補給水タンク内の水位が上限水位に達すると、軟水装置からの給水を停止することによって、補給水タンク内の水位を設定の範囲に保つ。 As described in Japanese Patent Application Laid-Open No. 2010-38385, a water softening device that removes hardness components such as calcium ions and magnesium ions contained in raw water is provided in the water supply path of the boiler to remove the hardness components. The soft water is supplied to the boiler. In JP 2010-38385 A, a hardness component is removed by a soft water device, and soft water that has been deaerated by a deoxygenation device is stored in a makeup water tank (soft water tank). A water level detector is provided in the make-up water tank, and when the water level in the make-up water tank falls below the lower limit water level, soft water is supplied from the water softener to the make-up water tank, and the water level in the make-up water tank reaches the upper limit water level. When reached, the water level in the makeup water tank is kept within the set range by stopping the water supply from the water softener.

補給水タンクの水は、水路を介して給水タンクへの移送を可能としておく。補給水タンクから給水タンクへの移送は、水頭圧差による自動給水や、移送ポンプの作動によって行う。ボイラへの給水は給水タンクから行っており、ボイラ内の水位に基づいて給水を制御している。そのため、ボイラでの蒸気発生によってボイラ内水位が低下すると、給水タンクからボイラへの給水を行い、ボイラへの給水を行ったことによって給水タンク内の水位が低下すると、補給水タンクから給水タンクへの軟水の移送を行う。そして、給水タンクへの移送によって補給水タンク内の水位が低下すると、軟水装置から補給水タンクへ軟水の供給を行うことになる。 The water in the make-up water tank can be transferred to the water supply tank via the water channel. Transfer from the make-up water tank to the water supply tank is performed by automatic water supply due to a water head pressure difference or by operation of a transfer pump. Water supply to the boiler is performed from a water supply tank, and water supply is controlled based on the water level in the boiler. Therefore, if the water level in the boiler decreases due to steam generation in the boiler, water is supplied from the water supply tank to the boiler. Of soft water. And if the water level in a makeup water tank falls by transfer to a water supply tank, soft water will be supplied from a water softener to a makeup water tank.

また、軟水装置などの能力は軟水使用量に基づいて決定しているが、ボイラの増設などによって軟水供給能力が不足することになり、軟水供給設備も能力の増強を行うということはよくある。その際、軟水装置の入れ替えだけでは対応することができず、処理水タンクや移送ポンプなど軟水装置以外の設備も能力増強をすることが必要となることがある。この場合、軟水供給設備全体を更新しなければならなくなると、大きな費用が必要になる。 In addition, although the capacity of the water softener is determined based on the amount of soft water used, it is often the case that the soft water supply capacity becomes insufficient due to the addition of boilers, and the capacity of the soft water supply equipment is also increased. At that time, the replacement of the water softener cannot be dealt with alone, and it may be necessary to increase the capacity of facilities other than the water softener such as the treated water tank and the transfer pump. In this case, if the entire soft water supply facility has to be updated, a large cost is required.

特開２０１０−３８３８５号公報JP 2010-38385 A

本発明が解決しようとする課題は、既設の軟水供給設備からの能力増強を行う場合、既存設備を有効に活用しながら軟水供給能力の増大を行うことのできる軟水供給設備を提供することにある。 The problem to be solved by the present invention is to provide a soft water supply facility capable of increasing the soft water supply capacity while effectively utilizing the existing facility when the capacity is increased from the existing soft water supply facility. .

請求項１に記載の発明は、原水中に含まれている硬度成分を除去する軟水装置、軟水装置と接続しており軟水装置で製造した軟水をためる軟水タンク、軟水タンクと軟水を使用する軟水使用装置の間に設けておき、軟水使用装置へ供給するために軟水タンクから移送してきた軟水をためておく給水タンクを持ち、給水タンク内の水位が水位Ｂ未満まで低下したことを検出すると軟水タンクから給水タンクへの軟水の移送を開始し、給水タンク内の水位が水位Ｂよりも高い水位Ａまで上昇したことを検出すると給水タンクへの軟水の移送を停止するものであって、前記軟水装置は軟水タンク内の水位が水位Ｄを下回ると軟水装置への通水を行って軟水タンクへの軟水供給を開始し、軟水タンク内の水位が水位Ｄより高い水位Ｃに達すると軟水装置への通水を停止して軟水タンクへの軟水供給を停止するように軟水タンク内水位に基づいて作動を制御するようにしている軟水供給設備において、前記軟水装置とは別に給水タンクに軟水を直接供給する増設軟水装置を設けておき、増設軟水装置は、給水タンク内の水位が水位Ｆより低くなると増設軟水装置による給水タンクへの軟水供給を開始し、給水タンク内の水位が水位Ｅまで上昇すると給水タンクへの軟水供給を停止するように給水タンク内の水位に基づいて作動を制御するようにしているものであることを特徴とする。
The invention according to claim 1 is a soft water device that removes hardness components contained in raw water, a soft water tank that is connected to the soft water device and stores soft water produced by the soft water device, and a soft water tank that uses soft water and soft water. If there is a water supply tank for storing the soft water transferred from the soft water tank to be supplied to the soft water use device, the water level in the water supply tank is detected to be lower than the water level B. The soft water transfer from the tank to the water supply tank is started, and when it is detected that the water level in the water supply tank has risen to the water level A higher than the water level B, the soft water transfer to the water supply tank is stopped. When the water level in the soft water tank falls below the water level D, the apparatus starts water supply to the soft water tank by supplying water to the soft water tank, and when the water level in the soft water tank reaches the water level C higher than the water level D, In the soft water supply facility that controls the operation based on the water level in the soft water tank so as to stop the water flow to the soft water tank and stop the soft water supply to the soft water tank, the soft water is supplied to the water supply tank separately from the soft water device. An additional soft water supply device is provided. When the water level in the water supply tank becomes lower than the water level F, the additional soft water device starts supplying soft water to the water supply tank by the additional soft water device, and the water level in the water supply tank reaches the water level E. The operation is controlled based on the water level in the water supply tank so as to stop the supply of soft water to the water supply tank when it rises.

請求項２に記載の発明は、前記の軟水供給設備において、増設軟水装置による軟水の供給を開始する水位は、軟水タンクから給水タンクへ軟水の移送を開始する水位よりも低く設定しているものであることを特徴とする。 The invention according to claim 2 is such that in the soft water supply facility, the water level at which the supply of soft water by the additional soft water device is started is set lower than the water level at which the transfer of soft water from the soft water tank to the water supply tank is started. It is characterized by being.

請求項３に記載の発明は、前記の軟水供給設備において、前記増設軟水装置は給水タンク内の水位に基づく作動制御に加えて、軟水タンク内の水位に基づいても作動を制御するようにしているものであることを特徴とする。 According to a third aspect of the present invention, in the soft water supply facility, in addition to the operation control based on the water level in the water supply tank, the additional soft water device controls the operation based on the water level in the soft water tank. It is characterized by being.

請求項４に記載の発明は、前記の軟水供給設備において、前記増設軟水装置では一定期間内での通水量を検出しておき、検出した通水量があらかじめ設定しておいた最低通水量に達していない場合には、強制的に通水を行うようにしていることを特徴とする。 According to a fourth aspect of the present invention, in the soft water supply facility, the additional water softener detects a water flow amount within a predetermined period, and the detected water flow amount reaches a preset minimum water flow amount. If not, it is characterized by forced water flow.

既存の機器を有効に活用しながら軟水供給能力の増大を図るものであるため、従来の機器が無駄にならず、設備増強に要する費用も削減することができる。 Since it is intended to increase the soft water supply capacity while effectively utilizing existing equipment, the conventional equipment is not wasted and the cost required for facility enhancement can be reduced.

本発明の一実施例での軟水供給設備のフロー図Flow chart of soft water supply facility in one embodiment of the present invention 本発明の他の実施例での軟水供給設備のフロー図Flow chart of soft water supply equipment in another embodiment of the present invention 能力増強を行う前の軟水供給設備のフロー図Flow chart of soft water supply facility before capacity expansion

本発明の一実施例を図面を用いて説明する。図１は本発明の一実施例での軟水供給設備のフロー図、図２は本発明の他の実施例での軟水供給設備のフロー図、図３は能力増強を行う前の軟水供給設備のフロー図である。図１及び図２は、図３から軟水供給能力の増強を行ったものであるため、まず図３に基づいて元の構成を説明する。図は、軟水使用機器であるボイラ２へ軟水を供給するための軟水供給設備である。軟水装置１０は、原水中に含まれている硬度成分をイオン交換の働きによって除去するものである。軟水装置１０で処理した軟水は、その下流に設置している軟水タンク１にためる。なお、軟水装置１０はイオン交換樹脂を用いて原水中の硬度成分を取り込むものであって、定期的にイオン交換樹脂の能力を回復させる再生動作が必要である。再生中は軟水を採水することができないため、２４時間給水の必要な場合には２台の軟水装置を並列に設置するようにしている。２台の軟水装置で交互に再生を行うようにしておくことで、一方の軟水装置が再生中の場合でも、他方の軟水装置では軟水の供給を行うことができる。 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a flow diagram of a soft water supply facility in one embodiment of the present invention, FIG. 2 is a flow diagram of a soft water supply facility in another embodiment of the present invention, and FIG. 3 is a diagram of the soft water supply facility before capacity enhancement. FIG. Since FIG.1 and FIG.2 increased the soft water supply capability from FIG. 3, first, an original structure is demonstrated based on FIG. The figure shows a soft water supply facility for supplying soft water to the boiler 2 which is a soft water using device. The water softener 10 removes the hardness component contained in the raw water by the action of ion exchange. The soft water treated by the soft water device 10 accumulates in the soft water tank 1 installed downstream thereof. In addition, the water softener 10 takes in the hardness component in raw | natural water using an ion exchange resin, Comprising: The reproduction | regeneration operation | movement which recovers the capability of an ion exchange resin regularly is required. Since soft water cannot be sampled during regeneration, two water softeners are installed in parallel when water supply is required for 24 hours. By performing regeneration alternately with two soft water devices, even when one soft water device is regenerating, the other soft water device can supply soft water.

ボイラ２では、個別に給水を行うため、ボイラごとに給水ポンプ４を持つ。各ボイラ２で共通となっている給水タンク７と各ボイラの間を給水配管で接続しておき、個別の給水配管途中に給水ポンプ４を設ける。個々のボイラ２にはボイラ水位制御装置１１を設けておき、ボイラ内の水位に基づいてボイラへの給水を行う。ボイラ水位制御装置１１では、ボイラ内の水位が給水開始水位未満まで低下したことを検出すると、給水ポンプ４の作動を行うことでボイラへの給水を行う。給水を行うことでボイラ内水位が上昇し、給水停止水位まで達したことを検出すると、ボイラ水位制御装置１１は給水ポンプ４の作動を停止することで給水を停止する。 The boiler 2 has a water supply pump 4 for each boiler in order to supply water individually. A water supply tank 7 common to each boiler 2 and each boiler are connected by a water supply pipe, and a water supply pump 4 is provided in the middle of the individual water supply pipe. Each boiler 2 is provided with a boiler water level control device 11 to supply water to the boiler based on the water level in the boiler. When detecting that the water level in the boiler has dropped below the water supply start water level, the boiler water level control device 11 supplies water to the boiler by operating the water supply pump 4. When it is detected that the water level in the boiler has increased to the water supply stop water level by supplying water, the boiler water level control device 11 stops the water supply by stopping the operation of the water supply pump 4.

ボイラ２へ供給する軟水の準備は、軟水供給設備の運転状態を制御する給水制御装置８による制御に基づいて行う。給水タンク７の軟水をボイラ２へ供給すると、給水タンク７内の水位は低下する。給水タンク７は軟水タンク１と移送路によって接続しており、給水タンク７内の水位が低下すると、移送路の途中に設けている移送ポンプ３を作動することによって軟水タンク１から給水タンク７へ軟水を送る。給水タンク７には給水タンク内水位検出装置６を設けており、給水タンク７への移送を開始する高さ位置（水位Ｂ）と、移送を停止する高さ位置（水位Ａ）において、水の有無を検出している。給水制御装置８は、給水タンク７内の水位が水位Ｂ未満まで低下したことを検出すると、移送ポンプ３の作動を行って軟水タンク１から給水タンク７へ軟水の移送を行う。そして給水タンク７への軟水供給により、給水タンク７内水位が水位Ａまで上昇したことを検出すると、移送ポンプ３の作動を停止する。 Preparation of the soft water supplied to the boiler 2 is performed based on control by the water supply control apparatus 8 which controls the operation state of the soft water supply equipment. If the soft water of the water supply tank 7 is supplied to the boiler 2, the water level in the water supply tank 7 will fall. The water supply tank 7 is connected to the soft water tank 1 by a transfer path. When the water level in the water supply tank 7 decreases, the transfer pump 3 provided in the transfer path is operated to move the soft water tank 1 to the water supply tank 7. Send soft water. The water tank 7 is provided with a water level detection device 6 in the water tank. Water is detected at a height position (water level B) at which transfer to the water tank 7 is started and at a height position (water level A) at which transfer is stopped. The presence or absence is detected. When the water supply control device 8 detects that the water level in the water supply tank 7 has dropped below the water level B, the water supply control device 8 operates the transfer pump 3 to transfer the soft water from the soft water tank 1 to the water supply tank 7. When detecting that the water level in the water supply tank 7 has risen to the water level A by supplying soft water to the water supply tank 7, the operation of the transfer pump 3 is stopped.

軟水タンク１から給水タンク７への給水を行うと、今度は軟水タンク１内の水位が低下する。軟水タンク１にも軟水タンク内水位検出装置５を設けており、軟水装置１０での軟化処理を開始する高さ位置（水位Ｄ）と、軟水装置１０での軟化処理を停止する高さ位置（水位Ｃ）において、水の有無を検出している。給水制御装置８は、軟水タンク１内の水位が水位Ｄ未満まで低下したことを検出すると、軟水装置１０への通水を行い、軟水装置１０で製造した軟水を軟水タンク１へ供給する。そして、軟水タンク１内水位が水位Ｃまで上昇したことを検出すると、軟水装置１０への通水を停止して軟水タンク１への軟水供給を停止する。 When water is supplied from the soft water tank 1 to the water supply tank 7, the water level in the soft water tank 1 is lowered. The soft water tank 1 is also provided with a water level detection device 5 in the soft water tank, and a height position (water level D) for starting the softening process in the soft water device 10 and a height position (stopping the softening process in the soft water device 10). The presence or absence of water is detected at the water level C). When the water supply control device 8 detects that the water level in the soft water tank 1 has dropped below the water level D, the water supply control device 8 supplies water to the soft water device 10 and supplies soft water produced by the soft water device 10 to the soft water tank 1. And if it detects that the water level in the soft water tank 1 rose to the water level C, the water supply to the soft water apparatus 10 will be stopped and the soft water supply to the soft water tank 1 will be stopped.

軟水タンク１での軟水量を水位Ｃから水位Ｄの範囲内に保っておくと、ボイラ２への給水によって給水タンク７内の水位が低下した場合でも、軟水タンク１内の軟水を給水タンク７へ送ることで、給水タンク７内の水位を高めることができる。そして、軟水タンク１から給水タンク７への移送により軟水タンク１内の水位が低下した場合には、軟水装置１０によって軟水を製造し、軟水タンク１への供給を行うので、ボイラ２での軟水の使用量よりも軟水装置１０での軟水供給量の方が多ければ、軟水タンク１内の水位が水位Ｄより大幅に低くなることはなく、軟水の供給を安定して行うことができる。 If the amount of soft water in the soft water tank 1 is kept within the range from the water level C to the water level D, even if the water level in the water supply tank 7 is lowered due to water supply to the boiler 2, the soft water in the soft water tank 1 is supplied to the water supply tank 7. By sending to the water level, the water level in the water supply tank 7 can be increased. And when the water level in the soft water tank 1 falls by the transfer from the soft water tank 1 to the water supply tank 7, soft water is produced by the soft water device 10 and supplied to the soft water tank 1, so the soft water in the boiler 2 If the amount of soft water supplied by the soft water device 10 is larger than the amount of water used, the water level in the soft water tank 1 will not be significantly lower than the water level D, and soft water can be supplied stably.

軟水の供給能力は、ピーク時における軟水の使用量に基づいて設定しておく。ボイラの一般的な運転状況としては、工場の操業開始時にはフル稼働して蒸気を大量に供給し、その後は蒸気の使用によって減少した分を補充するために低い負荷で稼働するという運転が多い。その場合、ボイラへの軟水の供給量は、ボイラがフル稼働している時間帯では多くなり、ボイラの稼働量が減少している時間帯では少なくなる。ボイラがフル稼働する時間は短くても、軟水供給設備では軟水使用量のピーク時にも軟水を不足させることなく供給できるようにしておく必要がある。 The supply capacity of soft water is set based on the amount of soft water used at the peak time. As a general operation state of a boiler, there are many operations in which a full operation is performed at the start of operation of a factory to supply a large amount of steam, and thereafter, operation is performed at a low load in order to replenish the amount reduced by the use of steam. In this case, the amount of soft water supplied to the boiler increases during the time when the boiler is fully operating, and decreases during the time when the operating amount of the boiler is decreasing. Even if the boiler is in full operation for a short time, it is necessary for the soft water supply equipment to be able to supply the soft water without deficiency even at the peak of the amount of soft water used.

そして工場での増設などによって軟水使用量が増加し、軟水供給能力を増加させることが必要になるということはよくあることである。ピーク時での軟水使用量が既設の軟水装置１０による軟水供給量より多くなった場合、軟水装置１０からの軟水供給を行っていても、軟水タンク１及び給水タンク７内の水位は低下し続けることになる。そして軟水タンク１が空になると、給水タンク７への軟水の移送が行えなくなり、給水タンク７でも水位が低下して空になると、ボイラへの給水が行えなくなる。そうなってしまうと、ボイラ２等の運転を停止しなければならなくなり、ボイラ２の停止は多方面に大きな影響を与えることとなる。 It is often the case that the amount of soft water used is increased by increasing the number of factories and it is necessary to increase the soft water supply capacity. When the amount of soft water used at the peak is greater than the amount of soft water supplied by the existing soft water device 10, the water levels in the soft water tank 1 and the water tank 7 continue to decrease even if soft water is supplied from the soft water device 10. It will be. When the soft water tank 1 becomes empty, it becomes impossible to transfer soft water to the water supply tank 7, and when the water level drops even in the water supply tank 7 and becomes empty, it becomes impossible to supply water to the boiler. If it becomes so, it will be necessary to stop operation | movement of the boiler 2 grade | etc., And the stop of the boiler 2 will have a big influence on many fields.

この場合、軟水装置１０を能力の大きなものへの置き換えることで軟水の採水能力を増大させることになる。その際、軟水タンク１や移送ポンプ３などはそのまま使えればよいが、軟水使用量の増加に合わせて軟水タンク１の容量増加や移送ポンプ３での能力増強なども必要になることが多い。しかし、全面的な更新を行うことになると、それまで使用していた設備は無駄になり、更新に要する費用も高くなる。図１及び図２は、図３から軟水供給能力の増大を図ったものであるが、既設の設備を利用しながら軟水の供給能力を増大させている。 In this case, by replacing the water softening device 10 with one having a large capacity, the water sampling capacity for soft water is increased. At that time, the soft water tank 1 and the transfer pump 3 may be used as they are, but it is often necessary to increase the capacity of the soft water tank 1 or increase the capacity of the transfer pump 3 in accordance with the increase in the amount of soft water used. However, when a full update is performed, the equipment used up to that point becomes useless and the cost required for the update also increases. 1 and FIG. 2 are intended to increase the soft water supply capacity from FIG. 3, but increase the soft water supply capacity while utilizing existing facilities.

図１の場合、既設の軟水装置１０、軟水タンク１、移送ポンプ３、給水タンク７はそのまま残している。そして増設軟水装置９は、軟水タンク１ではなく給水タンク７に接続しており、給水タンク７に直接給水する。給水タンク７内の水位を検出する給水タンク内水位検出装置６は、移送ポンプ３により軟水タンク１から給水タンク７への軟水の移送を開始する高さ位置（水位Ｂ）と、移送を停止する高さ位置（水位Ａ）での水位検出に加え、増設軟水装置９からの軟水供給を開始する高さ位置（水位Ｆ）と、増設軟水装置９からの軟水供給を停止する高さ位置（水位Ｅ）での水位検出を行う。 In the case of FIG. 1, the existing soft water device 10, the soft water tank 1, the transfer pump 3, and the water supply tank 7 are left as they are. The additional soft water device 9 is connected not to the soft water tank 1 but to the water supply tank 7 and directly supplies water to the water supply tank 7. The water level detection device 6 in the water tank that detects the water level in the water tank 7 stops the transfer at the height position (water level B) where the transfer pump 3 starts the transfer of the soft water from the soft water tank 1 to the water tank 7. In addition to detecting the water level at the height position (water level A), the height position (water level F) at which the soft water supply from the additional soft water device 9 is started and the height position (water level) at which the soft water supply from the additional soft water device 9 is stopped. The water level is detected in E).

増設軟水装置９は、既設の軟水装置１０による軟水供給のみでは不足する場合に作動するバックアップ用の軟水装置と位置づけており、増設軟水装置９からの軟水供給を開始する高さ位置（水位Ｆ）は、移送ポンプ３による給水タンク７への移送を開始する高さ位置（水位Ｂ）よりも低い位置に設定している。つまり、給水タンク７内の水位が水位Ｂまで低下すると、移送ポンプ３の作動によって給水タンク７内の水位を上昇させるため、通常の水位は水位Ｆまで低下することはなく、増設軟水装置９を作動するのは給水タンク７への給水が足りなくなった場合に行う。 The additional soft water device 9 is positioned as a backup soft water device that operates when only the soft water supply by the existing soft water device 10 is insufficient, and the height position (water level F) at which the soft water supply from the additional soft water device 9 is started. Is set at a position lower than the height position (water level B) at which transfer to the water supply tank 7 by the transfer pump 3 is started. That is, when the water level in the water supply tank 7 drops to the water level B, the water level in the water supply tank 7 is raised by the operation of the transfer pump 3, so the normal water level does not drop to the water level F. The operation is performed when water supply to the water supply tank 7 is insufficient.

まず、軟水使用量のピークから外れた時間帯であって、ボイラ２での軟水使用量は軟水供給可能量よりも少ない場合についての説明を行う。この場合、ボイラ２への軟水供給によって給水タンク７内水位が水位Ｂを下回ると、給水制御装置８は移送ポンプ３の作動を行い、軟水タンク１から給水タンク７へ軟水の移送を行う。軟水タンク１から給水タンク７へ移送ポンプ３による軟水の移送を行うと、軟水の移送量はボイラ２での軟水使用量より大きいため、給水タンク７内の水位は上昇する。移送ポンプ３による軟水の移送は、給水タンク７内水位が水位Ａになるまで行う。給水タンク７内の水位が水位Ａに達すると、給水制御装置８は移送ポンプ３の作動を停止する。給水タンク７への軟水の移送を停止すると、今度はボイラ２による軟水の使用により給水タンク７内の水位は低下するということを繰り返す。 First, a description will be given of a case where the amount of soft water used in the boiler 2 is smaller than the soft water supply possible amount in a time zone that deviates from the peak of soft water usage. In this case, when the water level in the water supply tank 7 falls below the water level B by supplying soft water to the boiler 2, the water supply control device 8 operates the transfer pump 3 to transfer soft water from the soft water tank 1 to the water supply tank 7. When soft water is transferred from the soft water tank 1 to the water supply tank 7 by the transfer pump 3, the amount of soft water transferred is larger than the amount of soft water used in the boiler 2, so that the water level in the water supply tank 7 rises. The soft water is transferred by the transfer pump 3 until the water level in the water supply tank 7 reaches the water level A. When the water level in the water supply tank 7 reaches the water level A, the water supply control device 8 stops the operation of the transfer pump 3. When the transfer of the soft water to the water supply tank 7 is stopped, the water level in the water supply tank 7 is lowered due to the use of the soft water by the boiler 2 this time.

また、軟水タンク１から給水タンク７へ軟水の移送を行うと、軟水タンク１内の水位が低下していく。軟水タンク１内水位が水位Ｄを下回ると、軟水装置１０による軟水の採水を開始し、軟水タンク１への軟水供給を行う。軟水装置１０による軟水供給量と移送ポンプ３による軟水移送量がボイラ２による軟水使用量より大きいと、給水タンク７内の水位は上昇する。軟水タンク１内の水位が水位Ｃに達すると、給水制御装置８は軟水装置１０による軟水供給を停止する。軟水タンク１への軟水の供給を停止すると、今度は移送ポンプ３による軟水の移送により軟水タンク１内の水位は低下するということを繰り返す。 Further, when soft water is transferred from the soft water tank 1 to the water supply tank 7, the water level in the soft water tank 1 decreases. When the water level in the soft water tank 1 is lower than the water level D, soft water sampling by the soft water device 10 is started and soft water is supplied to the soft water tank 1. If the amount of soft water supplied by the soft water device 10 and the amount of soft water transferred by the transfer pump 3 are larger than the amount of soft water used by the boiler 2, the water level in the water supply tank 7 rises. When the water level in the soft water tank 1 reaches the water level C, the water supply control device 8 stops the soft water supply by the soft water device 10. When the supply of the soft water to the soft water tank 1 is stopped, the water level in the soft water tank 1 is lowered due to the transfer of the soft water by the transfer pump 3 this time.

この場合における給水タンク７内での水位は水位Ａと水位Ｂの間に保たれ、軟水タンク１での水位は水位Ｃと水位Ｄの間に保たれる。そして、ボイラ２への給水が足りなくなることはなく、軟水は軟水装置１０からの供給分でまかなえるため、増設軟水装置９からの軟水供給は必要ない。 In this case, the water level in the water supply tank 7 is kept between the water level A and the water level B, and the water level in the soft water tank 1 is kept between the water level C and the water level D. And since the water supply to the boiler 2 does not run out and the soft water can be supplied by the supply from the soft water device 10, the soft water supply from the additional soft water device 9 is not necessary.

続いて、工場の操業開始時など、軟水使用量が軟水装置１０からの軟水供給量より多くなっている状態での説明を行う。この場合も、ボイラ２への軟水供給によって給水タンク７内水位が水位Ｂを下回ると、給水制御装置８は移送ポンプ３の作動を行い、軟水タンク１から給水タンク７へ軟水の移送を行う。移送ポンプ３による軟水の移送は、給水タンク７内水位が水位Ａになるまで行うが、ボイラ２による軟水使用量が移送ポンプ３による給水タンク７への軟水移送量より大きいと、移送ポンプ３による軟水の移送を行っても給水タンク７内の水位は低下し続けることになる。 Subsequently, a description will be given in a state where the amount of soft water used is larger than the amount of soft water supplied from the soft water device 10, such as at the start of factory operation. Also in this case, when the water level in the water supply tank 7 falls below the water level B due to the supply of soft water to the boiler 2, the water supply control device 8 operates the transfer pump 3 to transfer the soft water from the soft water tank 1 to the water supply tank 7. The soft water is transferred by the transfer pump 3 until the water level in the water supply tank 7 reaches the water level A. If the amount of soft water used by the boiler 2 is larger than the soft water transfer amount to the water supply tank 7 by the transfer pump 3, the transfer pump 3 Even if soft water is transferred, the water level in the water supply tank 7 continues to decrease.

給水タンク７内の水位が更に低下して水位Ｆより低くなると、給水制御装置８は増設軟水装置９による軟水の採水を開始する。すると給水タンク７では、軟水タンク１からの軟水移送に加えて、増設軟水装置９からの軟水供給も行うことになるので、給水タンク７への軟水供給量が多くなる。給水タンク７への軟水供給量がボイラ２での軟水使用量より大きくなると、給水タンク７内の水位は上昇していく。この場合、給水タンク７内の水位が水位Ｅまで上昇すると、給水制御装置８は増設軟水装置９からの軟水供給を停止する。増設軟水装置９による軟水供給が止まり、給水タンク７への軟水供給は軟水タンク１からの軟水移送のみになると、軟水供給量より軟水使用量が多くなるために水位は再び低下していく。そのため、この場合での給水タンク７内の水位は水位Ｅと水位Ｆの間で上下することになる。なお、軟水タンク１から給水タンク７へ軟水の移送を行うと、軟水タンク１内の水位が低下し、軟水タンク１内水位が水位Ｄを下回ると軟水装置１０から軟水タンク１への軟水供給を行う点は従来と同じである。 When the water level in the water supply tank 7 is further lowered and becomes lower than the water level F, the water supply control device 8 starts collecting soft water by the additional soft water device 9. Then, in the water supply tank 7, in addition to the soft water transfer from the soft water tank 1, the soft water supply from the additional soft water device 9 is also performed, so the soft water supply amount to the water supply tank 7 increases. When the amount of soft water supplied to the water supply tank 7 becomes larger than the amount of soft water used in the boiler 2, the water level in the water supply tank 7 rises. In this case, when the water level in the water supply tank 7 rises to the water level E, the water supply control device 8 stops the soft water supply from the additional soft water device 9. When the soft water supply by the additional soft water device 9 is stopped and the soft water supply to the water supply tank 7 is only the soft water transfer from the soft water tank 1, the amount of soft water used is larger than the soft water supply amount, so the water level decreases again. Therefore, the water level in the water supply tank 7 in this case rises and falls between the water level E and the water level F. When the soft water is transferred from the soft water tank 1 to the water supply tank 7, the water level in the soft water tank 1 decreases, and when the water level in the soft water tank 1 falls below the water level D, the soft water supply from the soft water device 10 to the soft water tank 1 is performed. The point to do is the same as before.

移送ポンプ３による軟水タンク１から給水タンク７への移送量よりも、ボイラ２による軟水使用量が多くなっていた場合でも、増設軟水装置９による軟水供給を加算することで給水タンク７への軟水供給量を増加することができ、ボイラ２への軟水供給が不足することを防止できる。 Even if the amount of soft water used by the boiler 2 is larger than the amount transferred from the soft water tank 1 to the water supply tank 7 by the transfer pump 3, the soft water supplied to the water supply tank 7 can be added by adding the soft water supply by the additional soft water device 9. It is possible to increase the supply amount and to prevent the supply of soft water to the boiler 2 from being insufficient.

図２は、図１に記載の軟水供給設備において、増設軟水装置９の発停を軟水タンク１内の水位に基づいても行うようにしたものである。軟水タンク１内の水位を検出する軟水タンク内水位検出装置５は、既設の軟水装置１０による採水を開始する高さ位置（水位Ｄ）と、採水を停止する高さ位置（水位Ｃ）での水位検出に加え、増設軟水装置９での採水を開始する高さ位置（水位Ｈ）と、増設軟水装置９での採水を停止する高さ位置（水位Ｇ）での水位検出を行う。 FIG. 2 is a configuration in which the extension soft water device 9 is started and stopped based on the water level in the soft water tank 1 in the soft water supply facility shown in FIG. The soft water tank water level detection device 5 that detects the water level in the soft water tank 1 includes a height position (water level D) at which water sampling is started by the existing soft water device 10 and a height position (water level C) at which water sampling is stopped. In addition to the water level detection at the water level, the water level detection at the height position (water level H) at which water sampling at the additional soft water device 9 is started and at the height position (water level G) at which water sampling at the additional soft water device 9 is stopped is performed. Do.

この場合も、ボイラ２への軟水供給によって給水タンク７内水位が水位Ｂを下回ると、給水制御装置８は移送ポンプ３の作動を行い、軟水タンク１から給水タンク７へ軟水の移送を行う。移送ポンプ３による軟水の移送は、給水タンク７内水位が水位Ａになるまで行うが、ボイラ２による軟水使用量が移送ポンプ３による給水タンク７への軟水移送量より大きいと、移送ポンプ３による軟水の移送を行っても給水タンク７内の水位は低下し続けることになる。 Also in this case, when the water level in the water supply tank 7 falls below the water level B due to the supply of soft water to the boiler 2, the water supply control device 8 operates the transfer pump 3 to transfer the soft water from the soft water tank 1 to the water supply tank 7. The soft water is transferred by the transfer pump 3 until the water level in the water supply tank 7 reaches the water level A. If the amount of soft water used by the boiler 2 is larger than the soft water transfer amount to the water supply tank 7 by the transfer pump 3, the transfer pump 3 Even if soft water is transferred, the water level in the water supply tank 7 continues to decrease.

この時、移送ポンプ３による軟水タンク１から給水タンク７への軟水移送量は、軟水装置１０による軟水供給量よりも大きなものであった場合、給水タンク７での水位低下速度よりも軟水タンク１での水位低下速度の方が早くなることがある。給水タンク７内の水位が水位Ｆ未満になるよりも、軟水タンク１内の水位が水位Ｈ未満になる方が早かった場合、給水制御装置８は軟水タンク内水位検出装置５で水位が水位Ｈ未満になったことを検出すると、増設軟水装置９による軟水の採水を開始する。 At this time, when the amount of soft water transferred from the soft water tank 1 to the water supply tank 7 by the transfer pump 3 is larger than the amount of soft water supplied by the soft water device 10, the soft water tank 1 is faster than the water level lowering rate in the water supply tank 7. In some cases, the water level lowering speed in the case is faster. When the water level in the soft water tank 1 is lower than the water level H than the water level in the water tank 7 is lower than the water level F, the water supply control device 8 is the water level detection device 5 in the soft water tank and the water level is the water level H. If it detects that it became less than, the soft water sampling by the additional soft water apparatus 9 will be started.

増設軟水装置９による軟水供給は、給水タンク７の水位のみに基づいて行うようにしていた場合、軟水タンク１内の水位低下速度が速いために軟水タンク１内の軟水が先に空になり、軟水タンク１から給水タンク７への軟水の移送が行われなくなることが考えられる。その場合、軟水タンク１からの軟水がなくなると、給水タンク内の水位が急激に低下することになる。給水タンク７内水位が水位Ｆになった時点で増設軟水装置９への通水を開始しても、増設軟水装置９への採水開始指令の出力から、実際に給水タンク７への軟水が供給されるまでは若干のタイムラグがあるため、場合によってはボイラ２へ供給する軟水がなくなることもありえる。 When the soft water supply by the additional soft water device 9 is performed only based on the water level of the water supply tank 7, the soft water in the soft water tank 1 is emptied first because the water level lowering speed in the soft water tank 1 is fast, It is conceivable that the soft water is not transferred from the soft water tank 1 to the water supply tank 7. In that case, when the soft water from the soft water tank 1 is exhausted, the water level in the water supply tank is rapidly lowered. Even if water supply to the additional soft water device 9 is started when the water level in the water supply tank 7 reaches the water level F, the soft water actually supplied to the water supply tank 7 from the output of the water sampling start command to the additional soft water device 9 Since there is a slight time lag until the water is supplied, the soft water supplied to the boiler 2 may be lost in some cases.

このような場合には、軟水タンク１内の水位が水位Ｈになった時点で増設軟水装置９による軟水の供給を開始するようにしておくと、増設軟水装置９に供給する軟水がなくなるという事態を防止することができる。給水タンク７内の水位が大きく低下する前に増設軟水装置９による軟水の供給を開始することで、ボイラ２へ供給する軟水が不足することを防止することができる。 In such a case, if the supply of the soft water by the additional soft water device 9 is started when the water level in the soft water tank 1 becomes the water level H, the soft water supplied to the additional soft water device 9 is lost. Can be prevented. By starting the supply of soft water by the additional soft water device 9 before the water level in the water supply tank 7 is greatly reduced, it is possible to prevent the soft water supplied to the boiler 2 from being insufficient.

なお、軟水装置１０は交互に再生を行うために２台の軟水装置を並列に設置することが多いが、増設軟水装置９は１台のみの設置で十分となる。増設軟水装置９による軟水の供給を行う水位は、軟水装置１０による軟水供給を行う水位よりも低く設定している。そのため、増設軟水装置９は既設の軟水装置１０では足りなくなった場合のバックアップ用として働くことになる。増設軟水装置９では、軟水使用量のピーク時のみ採水するものであり、ピーク時以外の時間帯は軟水の供給を行う必要がない。そのため、ピークの時間帯には再生を禁止する設定を行っておき、それ以外の時間帯に再生動作行うことで、増設軟水装置９は並列設置としなくても再生を行いながら必要な時に軟水の採水を行うことができる。 In addition, since the soft water apparatus 10 performs regeneration alternately, in many cases, two soft water apparatuses are installed in parallel. However, it is sufficient to install only one additional soft water apparatus 9. The water level at which soft water is supplied by the additional soft water device 9 is set lower than the water level at which soft water is supplied by the soft water device 10. Therefore, the additional soft water device 9 works as a backup when the existing soft water device 10 is insufficient. The additional soft water device 9 collects water only at the peak of the amount of soft water used, and it is not necessary to supply soft water during a time zone other than the peak time. Therefore, by setting the prohibition of regeneration in the peak time zone and performing the regeneration operation in other time zones, the additional soft water device 9 does not have to be installed in parallel, and the soft water is used when necessary while performing the regeneration. Water sampling can be performed.

また、上記で記載したように増設軟水装置９はピーク時のみの稼働であるため、状況によっては長時間使用されないこともある。軟水装置では、通水がない状態が長時間続くと、採水開始時にイオン交換樹脂から成分の溶け出しによって水質を悪化させることがあるため、１日単位などで通水量を算出しておき、通水量が最低通水量に達していない場合には、増設軟水装置９による軟水の採水を行うようにしておく。その場合の通水量は、設定しておいた最低通水量から実際の通水量を引いた差の分だけ行う。このようにすることにより、水質が悪化した水を供給することを防止できる。 Further, as described above, the additional water softener 9 is operated only at the peak time, and may not be used for a long time depending on the situation. In the water softener, if there is no water flow for a long time, the water quality may be deteriorated by the dissolution of components from the ion exchange resin at the start of water sampling. When the water flow rate does not reach the minimum water flow rate, soft water is sampled by the additional soft water device 9 in advance. In that case, the water flow rate is the same as the difference obtained by subtracting the actual water flow rate from the set minimum water flow rate. By doing in this way, it can prevent supplying the water whose water quality deteriorated.

なお、本発明は以上説明した実施例に限定されるものではなく、多くの変形が本発明の技術的思想内で当分野において通常の知識を有する者により可能である。 The present invention is not limited to the embodiments described above, and many modifications can be made by those having ordinary knowledge in the art within the technical idea of the present invention.

１軟水タンク
２ボイラ
３移送ポンプ
４給水ポンプ
５軟水タンク内水位検出装置
６給水タンク内水位検出装置
７給水タンク
８給水制御装置
９増設軟水装置
１０既設軟水装置
１１ボイラ水位制御装置

1 Soft water tank
2 Boiler
DESCRIPTION OF SYMBOLS 3 Transfer pump 4 Water supply pump 5 Water level detection apparatus in soft water tank 6 Water level detection apparatus in water tank 7 Water supply tank 8 Water supply control apparatus 9 Additional soft water apparatus 10 Existing soft water apparatus 11 Boiler water level control apparatus

Claims

原水中に含まれている硬度成分を除去する軟水装置、軟水装置と接続しており軟水装置で製造した軟水をためる軟水タンク、軟水タンクと軟水を使用する軟水使用装置の間に設けておき、軟水使用装置へ供給するために軟水タンクから移送してきた軟水をためておく給水タンクを持ち、給水タンク内の水位が水位Ｂ未満まで低下したことを検出すると軟水タンクから給水タンクへの軟水の移送を開始し、給水タンク内の水位が水位Ｂよりも高い水位Ａまで上昇したことを検出すると給水タンクへの軟水の移送を停止するものであって、前記軟水装置は軟水タンク内の水位が水位Ｄを下回ると軟水装置への通水を行って軟水タンクへの軟水供給を開始し、軟水タンク内の水位が水位Ｄより高い水位Ｃに達すると軟水装置への通水を停止して軟水タンクへの軟水供給を停止するように軟水タンク内水位に基づいて作動を制御するようにしている軟水供給設備において、前記軟水装置とは別に給水タンクに軟水を直接供給する増設軟水装置を設けておき、増設軟水装置は、給水タンク内の水位が水位Ｆより低くなると増設軟水装置による給水タンクへの軟水供給を開始し、給水タンク内の水位が水位Ｅまで上昇すると給水タンクへの軟水供給を停止するように給水タンク内の水位に基づいて作動を制御するようにしているものであることを特徴とする軟水供給設備。 A soft water device that removes hardness components contained in raw water, a soft water tank that is connected to the soft water device and stores soft water produced by the soft water device, and is provided between the soft water tank and the soft water use device that uses the soft water, Transfer of soft water from the soft water tank to the water supply tank when it is detected that the water level in the water supply tank has dropped below the water level B. was started, there is the water level in the water supply tank stops the transfer of soft water to the water tank and detects that it has increased to a higher level a than the water level B, the water level of the water softener soft water tank water level When the water level falls below D, water is supplied to the water softener and the supply of soft water to the soft water tank is started. When the water level in the soft water tank reaches the water level C higher than the water level D, the water flow to the water softener is stopped and the water softened. In soft water supply equipment so as to control the operation based on the soft water tank water level so as to stop the soft water supply to the tank, provided with a supply additional water softener directly soft water separately from the water supply tank and the water softener The additional water softener starts supplying soft water to the water supply tank when the water level in the water supply tank becomes lower than the water level F. When the water level in the water supply tank rises to the water level E, the soft water supply to the water supply tank is started. A soft water supply facility characterized in that the operation is controlled based on the water level in the water supply tank so as to stop .

請求項１に記載の軟水供給設備において、増設軟水装置による軟水の供給を開始する水位Ｆは、軟水タンクから給水タンクへ軟水の移送を開始する水位Ｂよりも低く設定しているものであることを特徴とする軟水供給設備。 In the soft water supply facility according to claim 1, the water level F at which the supply of the soft water by the additional soft water device is set lower than the water level B at which the soft water is transferred from the soft water tank to the water supply tank. Soft water supply equipment characterized by.

請求項１または２に記載の軟水供給設備において、前記増設軟水装置は給水タンク内の水位に基づく作動制御に加えて、軟水タンク内の水位に基づいても作動を制御するようにしているものであることを特徴とする軟水供給設備。 The soft water supply facility according to claim 1 or 2, wherein the additional soft water device controls the operation based on the water level in the soft water tank in addition to the operation control based on the water level in the water tank. A soft water supply facility characterized by being.

請求項１から３のいずれかに記載の軟水供給設備において、前記増設軟水装置では一定期間内での通水量を検出しておき、検出した通水量があらかじめ設定しておいた最低通水量に達していない場合には、強制的に通水を行うようにしていることを特徴とする軟水供給設備。

The soft water supply facility according to any one of claims 1 to 3, wherein the additional water softener detects a water flow amount within a predetermined period, and the detected water flow amount reaches a preset minimum water flow amount. A soft water supply facility characterized in that water is forced to flow when not.