JP2010051910A - Anomaly detection method of filter press and filter press - Google Patents

Anomaly detection method of filter press and filter press Download PDF

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JP2010051910A
JP2010051910A JP2008221052A JP2008221052A JP2010051910A JP 2010051910 A JP2010051910 A JP 2010051910A JP 2008221052 A JP2008221052 A JP 2008221052A JP 2008221052 A JP2008221052 A JP 2008221052A JP 2010051910 A JP2010051910 A JP 2010051910A
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pair
slurry
driving
pump
pressure
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Hideaki Tanaka
秀明 田中
Ukon Wada
右近 和田
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Parker Engineering Co Ltd
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Parker Engineering Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of detecting slurry leakage from filter plates, the anomaly of a filter press, at an early stage, in the filter press including a reciprocating constant discharge pressure pump as a slurry feed pump. <P>SOLUTION: In the anomaly detection method of the filter press having the reciprocating constant discharge pressure pump as the slurry feed pump, the time required for one time slurry feeding immediately after the high pressure feeding of the slurry for each filtering work. When a ratio of T1/T2 of the feeding time T1 immediately after the high pressure feeding in the current filtering work to the feeding time T2 immediately after the high pressure feeding in the previous filtering work is equal to or less than the prescribed value which is less than 1, the slurry is determined to leak from filter plates. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、フィルタープレスの異常検知方法に関するものである。 The present invention relates to an abnormality detection method for a filter press.

特許文献1等に開示されたフィルタープレスが、汚泥処理に広く使用されている。
特公平2−62285号公報
The filter press disclosed in Patent Document 1 is widely used for sludge treatment.
Japanese Examined Patent Publication No. 2-62285

フィルタープレスにおいては、排水孔と凹部とが形成された一対の濾板の間にスラリー吐出孔が形成された中央板と一対の濾布とを挟み、凹部が形成する濾室にスラリー吐出孔からスラリー打ち込んでスラリーを濾過する。従って、濾板と中央板との密着が不十分であると濾室からスラリーが漏れて本来の機能を発揮することができない。
本発明は、スラリー打ち込みポンプとして往復動定吐出圧ポンプを備えるフィルタープレスにおいて、当該フィルタープレスの異常である濾板からのスラリーの漏れをいち早く検知する方法並びに濾板からのスラリーの漏れをいち早く検知することができるフィルタープレスを提供することを目的とする。
In the filter press, a center plate having a slurry discharge hole and a pair of filter cloths are sandwiched between a pair of filter plates having drain holes and recesses, and the slurry is driven into the filter chamber formed by the recesses from the slurry discharge holes. Filter the slurry at Therefore, if the close contact between the filter plate and the center plate is insufficient, the slurry leaks from the filter chamber and cannot perform its original function.
The present invention relates to a filter press having a reciprocating constant discharge pressure pump as a slurry driving pump, a method for quickly detecting slurry leakage from a filter plate, which is abnormal in the filter press, and a slurry leak from a filter plate. It aims at providing the filter press which can be performed.

上記課題を解決するために、本発明においては、スラリー打ち込みポンプとして往復動定吐出圧ポンプを備えるフィルタープレスの異常検知方法であって、濾過作業毎にスラリーの高圧打ち込み開始直後の1回の打ち込みに要する時間を計測し、今回の濾過作業における高圧打ち込み開始直後の打ち込み時間T1と前回の濾過作業における高圧打ち込み開始直後の打ち込み時間T2との比T1/T2が1未満の所定値以下である場合に濾板からスラリーが漏れていると判断することを特徴とする異常検知方法を提供する。
エア駆動ダイアフラムポンプ等の往復動定吐出圧ポンプをスラリー打ち込みポンプとして使用した場合、定圧のスラリーが濾室に供給されるので、濾室から液体が排出される際の流動抵抗の大小によって1回のスラリー打ち込みに要する時間が増減する。濾布の目詰まりを抑制する観点から、フィルタープレスでは一般にスラリー打ち込み開始時には低圧のスラリー打ち込みを行い、所定時間経過後に高圧の打ち込みへ移行する。濾板からの漏れの有無による1回の打ち込み時間の変化は、低圧打ち込み時よりも高圧打ち込み時に顕著に現れるはずである。従って、濾過作業毎にスラリーの高圧打ち込み開始直後の1回の打ち込みに要する時間を計測し、今回の濾過作業における高圧打ち込み開始直後の打ち込み時間T1と前回の濾過作業における高圧打ち込み開始直後の打ち込み時間T2との比T1/T2が1未満の所定値以下である場合に濾板からスラリーが漏れていると判断することによって、濾板からのスラリーの漏れというフィルタープレスの異常を速やかに検知することができる。
In order to solve the above-mentioned problem, in the present invention, there is provided an abnormality detection method for a filter press provided with a reciprocating constant discharge pressure pump as a slurry driving pump, which is driven once immediately after the start of high-pressure driving of slurry for each filtering operation. When the ratio T1 / T2 between the driving time T1 immediately after the start of high-pressure driving in the current filtering operation and the driving time T2 immediately after the start of high-pressure driving in the previous filtering operation is less than a predetermined value less than 1 And providing an abnormality detection method characterized in that it is judged that slurry is leaking from the filter plate.
When a reciprocating constant discharge pressure pump such as an air-driven diaphragm pump is used as a slurry driving pump, a slurry with a constant pressure is supplied to the filter chamber. Therefore, the slurry is supplied once depending on the flow resistance when the liquid is discharged from the filter chamber. The time required to drive the slurry increases or decreases. From the viewpoint of suppressing clogging of the filter cloth, a filter press generally performs low-pressure slurry driving at the start of slurry driving, and shifts to high-pressure driving after a predetermined time has elapsed. A change in the time of single implantation due to the presence or absence of leakage from the filter plate should be more noticeable when the high pressure is implanted than when the low pressure is implanted. Therefore, the time required for one implantation immediately after the start of the high-pressure implantation of the slurry is measured for each filtration operation, and the implantation time T1 immediately after the start of the high-pressure implantation in the current filtration operation and the implantation time immediately after the start of the high-pressure implantation in the previous filtration operation. By detecting that the slurry is leaking from the filter plate when the ratio T1 / T2 with T2 is less than a predetermined value less than 1, the filter press abnormality of the slurry leaking from the filter plate is quickly detected. Can do.

本発明の好ましい態様においては、往復動定吐出圧ポンプは、ケーシングの一部と一対のダイアフラムとで形成された対峙する一対の圧力室と、ケーシングの残余部と前記一対のダイアフラムとで形成され前記一対の圧力室に隣接する一対のポンプ室と、エア供給源から供給された加圧エアを前記一対の圧力室に交互に供給排気するパイロット弁機構又は電磁弁機構と、ケーシングの前記一部を貫通して前記一対の圧力室に進入し前記一対のダイアフラムを連結するロッドと、各ポンプ室に配設された吸入弁と吐出弁とを備えるエア駆動複式ダイアフラムポンプであり、前記ロッドの往復動又は圧力室の内圧変動を検知して1回のスラリー打ち込みに要する時間を計測する。
往復動定吐出圧ポンプがエア駆動複式ダイアフラムポンプである場合、一対のダイアフラムを相互に連結するロッドの往復動又は圧力室の内圧変動を検知することにより、1回のスラリー打ち込みに要する時間を計測することができる。
In a preferred aspect of the present invention, the reciprocating constant discharge pressure pump is formed by a pair of opposing pressure chambers formed by a part of the casing and a pair of diaphragms, a remaining portion of the casing, and the pair of diaphragms. A pair of pump chambers adjacent to the pair of pressure chambers, a pilot valve mechanism or an electromagnetic valve mechanism for alternately supplying and exhausting pressurized air supplied from an air supply source to the pair of pressure chambers, and the part of the casing. An air-driven double diaphragm pump comprising a rod that penetrates the pair of pressure chambers and connects the pair of diaphragms, and a suction valve and a discharge valve disposed in each pump chamber. The time required for one slurry driving is measured by detecting the dynamic pressure or the internal pressure fluctuation of the pressure chamber.
When the reciprocating constant discharge pressure pump is an air-driven double diaphragm pump, the time required for one slurry injection is measured by detecting the reciprocating movement of the rods that interconnect the pair of diaphragms or the internal pressure fluctuation of the pressure chamber. can do.

本発明においては、スラリー打ち込みポンプとしての往復動定吐出圧ポンプと、往復動定吐出圧ポンプの作動を制御する制御装置とを備え、制御装置は、濾過作業毎にスラリーの高圧打ち込み開始直後の1回の打ち込みに要する時間を計測して記憶し、今回の濾過作業における高圧打ち込み開始直後の打ち込み時間T1と前回の濾過作業における高圧打ち込み開始直後の打ち込み時間T2との比T1/T2が1未満の所定値以下である場合に濾板からスラリーが漏れていると判断して、警報を発することを特徴とするフィルタープレスを提供する。
本発明に係るフィルタープレスにおいては、濾板からのスラリーの漏れがいち早く検知され警報が発せられるので、漏れ止め作業を迅速に行うことができ、高い処理効率を実現できる。
In the present invention, a reciprocating constant discharge pressure pump as a slurry driving pump and a control device for controlling the operation of the reciprocating constant discharge pressure pump are provided. The time required for one driving is measured and stored, and the ratio T1 / T2 between the driving time T1 immediately after the start of the high pressure driving in the current filtering operation and the driving time T2 immediately after the start of the high pressure driving in the previous filtering operation is less than 1. A filter press characterized by issuing a warning when it is determined that the slurry is leaking from the filter plate when the value is equal to or less than the predetermined value.
In the filter press according to the present invention, the leakage of slurry from the filter plate is quickly detected and an alarm is issued, so that the leakage prevention operation can be performed quickly and high processing efficiency can be realized.

本発明により、スラリー打ち込みポンプとして往復動定吐出圧ポンプを備えるフィルタープレスにおいて、当該フィルタープレスの異常である濾板からのスラリーの漏れをいち早く検知する方法並びに濾板からのスラリーの漏れをいち早く検知することができるフィルタープレスが提供される。 According to the present invention, in a filter press equipped with a reciprocating constant discharge pressure pump as a slurry driving pump, a method of quickly detecting slurry leakage from a filter plate, which is an abnormality of the filter press, and a slurry leakage from a filter plate are quickly detected. A filter press is provided.

本発明の実施例に係るフィルタープレスの異常検知方法を説明する。
図1(a)に示すように、全自動フィルタープレス1は、凹部2aが形成された面を対向させて上下に延在し水平移動可能な一対の濾板2と、前記一対の濾板2の間に配設されて上下に延在しスラリー吐出口3aが形成された中央板3と、スラリー吐出口3aに接続されたスラリー打ち込み用のエア駆動複式ダイアフラムポンプ4と、各濾板2と中央板3との間に配設されて上下に延在する濾布5とを備えている。全自動フィルタープレス1は更に、中央板3に摺接する一対のブレード6aを有し上下移動可能なケーキ掻き落とし部材6を備えている。濾布5の上端はケーキ掻き落とし部材6に固定されており、濾布5の下端に固定された錘7が、濾布5に上下方向の張力を印加している。濾板2の下端角部2bと濾板2の直下に配設されたピアノ線8とが濾布5に係合し、濾布5を乙状に屈曲させている。
An abnormality detection method for a filter press according to an embodiment of the present invention will be described.
As shown in FIG. 1 (a), a fully automatic filter press 1 includes a pair of filter plates 2 that extend vertically and can move horizontally with the surface on which a recess 2a is formed facing each other, and the pair of filter plates 2 described above. A central plate 3 which is disposed between and extends vertically and has a slurry discharge port 3a formed therein, an air-driven double diaphragm pump 4 for driving slurry connected to the slurry discharge port 3a, and each filter plate 2 A filter cloth 5 disposed between the central plate 3 and extending vertically is provided. The fully automatic filter press 1 further includes a cake scraping member 6 having a pair of blades 6a that are in sliding contact with the central plate 3 and capable of moving up and down. The upper end of the filter cloth 5 is fixed to the cake scraping member 6, and a weight 7 fixed to the lower end of the filter cloth 5 applies a vertical tension to the filter cloth 5. The lower end corner portion 2b of the filter plate 2 and the piano wire 8 disposed immediately below the filter plate 2 are engaged with the filter cloth 5, and the filter cloth 5 is bent in a second shape.

エア駆動複式ダイアフラムポンプ4は、例えば特許第3023872号公報や特開2007−120446号公報等に開示されているように、ケーシングの一部と一対のダイアフラムとで形成された対峙する一対の圧力室と、ケーシングの残余部と前記一対のダイアフラムとで形成され前記一対の圧力室に隣接する一対のポンプ室と、エア供給源から供給された加圧エアを前記一対の圧力室に交互に供給排気するパイロット弁機構と、ケーシングの前記一部を貫通して前記一対の圧力室に進入し前記一対のダイアフラムを連結するロッドと、各ポンプ室に配設された吸入弁と吐出弁とを備えている。パイロット弁機構は、一方の圧力室の容積が最小となり他方の圧力室の容積が最大となる位置まで一対のダイアフラムが変位し、ひいてはロッドが変位すると、前記一方の圧力室を給気路に接続すると共に前記他方の圧力室を排気路に接続し、前記一方の圧力室の容積が最大となり前記他方の圧力室の容積が最小となる位置まで一対のダイアフラムが変位し、ひいてはロッドが変位すると、前記一方の圧力室を排気路に接続すると共に前記他方の圧力室を給気路に接続する。エア駆動複式ダイアフラムポンプ4をエア供給源に接続すれば、パイロット弁機構の作動により、エア駆動複式ダイアフラムポンプ4は、一対のポンプ室に交互に流体を吸引し一対のポンプ室から交互に流体を吐出する動作を自動的に繰り返す。 The air-driven double diaphragm pump 4 includes a pair of opposing pressure chambers formed by a part of a casing and a pair of diaphragms as disclosed in, for example, Japanese Patent No. 3023872 and Japanese Patent Application Laid-Open No. 2007-120446. And a pair of pump chambers formed by the remaining portion of the casing and the pair of diaphragms and adjacent to the pair of pressure chambers, and pressurized air supplied from an air supply source are alternately supplied to the pair of pressure chambers. A pilot valve mechanism, a rod penetrating the part of the casing and entering the pair of pressure chambers to connect the pair of diaphragms, and a suction valve and a discharge valve disposed in each pump chamber. Yes. The pilot valve mechanism connects the one pressure chamber to the air supply path when the pair of diaphragms are displaced until the volume of one pressure chamber is minimized and the volume of the other pressure chamber is maximized. When the other pressure chamber is connected to the exhaust passage, the pair of diaphragms are displaced to a position where the volume of the one pressure chamber is maximized and the volume of the other pressure chamber is minimized, and as a result, the rod is displaced, The one pressure chamber is connected to an exhaust passage and the other pressure chamber is connected to an air supply passage. If the air-driven double diaphragm pump 4 is connected to an air supply source, the air-driven double diaphragm pump 4 alternately sucks fluid into the pair of pump chambers and alternately draws fluid from the pair of pump chambers by the operation of the pilot valve mechanism. The discharge operation is automatically repeated.

全自動フィルタープレス1は制御装置9を備えている。制御装置9は、エア駆動複式ダイアフラムポンプ4に供給される加圧エアの圧力を可変制御すると共に、エア駆動複式ダイアフラムポンプ4の一対のダイアフラムを連結するロッドの位置を検知する近接センサ等の位置センサの検知信号と内蔵するタイマーとに基づいてスラリーの打ち込み回数や1回のスラリーの打ち込みに要する時間を計測してポンプ4の作動を制御する。 The fully automatic filter press 1 includes a control device 9. The control device 9 variably controls the pressure of the pressurized air supplied to the air-driven double diaphragm pump 4 and positions such as proximity sensors that detect the positions of the rods connecting the pair of diaphragms of the air-driven double diaphragm pump 4 Based on the detection signal of the sensor and a built-in timer, the number of times of slurry driving and the time required for one slurry driving are measured to control the operation of the pump 4.

全自動フィルタープレス1の作動を説明する。
図1(a)に示すように、ケーキ掻き落とし部材6が中央板3の上方へ移動し、中央板3と濾板2とが濾布5を間に挟んで当接し、凹部2aが密閉された状態で、ポンプ4が始動し、密閉された凹部2aが形成する濾室に、中央板3のスラリー吐出口3aを介してスラリーを打ち込む。スラリー中の固形物を濾布5で濾し取ると共に、濾布5を通過したスラリー中の水分を濾板2に形成した図示しない排出穴を介して全自動フィルタープレス1外へ排出する。
The operation of the fully automatic filter press 1 will be described.
As shown in FIG. 1 (a), the cake scraping member 6 moves above the center plate 3, the center plate 3 and the filter plate 2 come into contact with the filter cloth 5 therebetween, and the recess 2a is sealed. In this state, the pump 4 is started, and the slurry is driven into the filter chamber formed by the sealed recess 2a through the slurry discharge port 3a of the center plate 3. The solid matter in the slurry is filtered by the filter cloth 5 and the water in the slurry that has passed through the filter cloth 5 is discharged out of the fully automatic filter press 1 through a discharge hole (not shown) formed in the filter plate 2.

制御装置9は、濾布5の目詰まりを抑制するために、スラリーの打ち込み開始後所定時間に亙ってポンプ4に定低圧の加圧エアを供給し、定低圧のスラリーを凹部2aが形成する濾室に打ち込む。
低圧打ち込みを所定時間継続したのち、制御装置9は、ポンプ4に供給する加圧エアを定高圧の加圧エアに切り替え、定高圧のスラリーを凹部2aが形成する濾室に打ち込む。
In order to suppress clogging of the filter cloth 5, the control device 9 supplies constant pressure and low pressure air to the pump 4 for a predetermined time after the start of slurry driving, and the recess 2 a forms constant pressure and low pressure slurry. Drive into the filter chamber.
After continuing the low-pressure driving for a predetermined time, the control device 9 switches the pressurized air supplied to the pump 4 to a constant-high pressure pressurized air, and drives the constant-pressure slurry into the filter chamber formed by the recess 2a.

制御装置9は濾過作業毎に、高圧打ち込み開始直後の1回のスラリー打ち込みに要する時間を計測し、当該時間を記憶している。制御装置9は、今回の濾過作業における高圧打ち込み開始直後の打ち込み時間T1と前回の濾過作業における高圧打ち込み開始直後の打ち込み時間T2との比T1/T2が1未満の所定値、例えば0.9以下である場合に、濾板2と中央板3との密着が不十分で、両者間に隙間が形成され、当該隙間からスラリーが漏れていると判断して警報を発し、ポンプ4を停止させる。これにより、スラリーの高圧打ち込み開始後早々に濾板2からのスラリーの漏れが発見され、保守要員による迅速な濾板2と中央板3との位置調整が実現され、スラリーの漏れにより濾過の実効性が失われる事態の発生が防止される。
濾板2からの漏れの有無による1回の打ち込み時間の変化は、低圧打ち込み時よりも高圧打ち込み時に顕著に現れるはずである。従って、濾過作業毎にスラリーの高圧打ち込み開始直後の1回の打ち込みに要する時間を計測して記憶しておき、今回の濾過作業における高圧打ち込み開始直後の打ち込み時間T1と前回の濾過作業における高圧打ち込み開始直後の打ち込み時間T2との比T1/T2を演算して当該比が1未満の所定値以下である場合に濾板2からスラリーが漏れていると判断することによって、濾板2からのスラリーの漏れというフィルタープレスの異常を確実且つ速やかに検知することができる。
The control device 9 measures the time required for one slurry driving immediately after the start of the high-pressure driving for each filtering operation, and stores the time. The control device 9 determines that the ratio T1 / T2 between the driving time T1 immediately after the start of high pressure driving in the current filtering operation and the driving time T2 immediately after the start of high pressure driving in the previous filtering operation is less than 1, for example, 0.9 or less. In this case, the filter plate 2 and the center plate 3 are not sufficiently in close contact with each other, a gap is formed between them, and it is determined that the slurry is leaking from the gap, and an alarm is issued and the pump 4 is stopped. As a result, the leakage of the slurry from the filter plate 2 is discovered immediately after the start of the high-pressure driving of the slurry, and the position of the filter plate 2 and the central plate 3 can be quickly adjusted by maintenance personnel. Occurrence of loss of sex is prevented.
A change in the time of one-time driving due to the presence or absence of leakage from the filter plate 2 should be more noticeable at the time of high-pressure driving than at the time of low-pressure driving. Therefore, the time required for one injection immediately after the start of high pressure injection of slurry is measured and stored for each filtration operation, and the injection time T1 immediately after the start of high pressure injection in the current filtration operation and the high pressure injection in the previous filtration operation are stored. The slurry from the filter plate 2 is calculated by calculating the ratio T1 / T2 with the implantation time T2 immediately after the start and determining that the slurry is leaking from the filter plate 2 when the ratio is less than a predetermined value less than 1. It is possible to reliably and promptly detect an abnormality of the filter press such as leakage.

比T1/T2が1未満の所定値を超える場合には、制御装置9は濾板2からのスラリーの漏れは無いと判断してポンプ4の作動を継続させる。
スラリーの高圧打ち込み回数が所定値に達すると、制御装置9は濾室内のケーキ密度が所定値まで上昇したと判断して、ポンプ4の作動を停止させる。
When the ratio T1 / T2 exceeds a predetermined value less than 1, the control device 9 determines that there is no slurry leakage from the filter plate 2 and continues the operation of the pump 4.
When the number of times of high-pressure driving of the slurry reaches a predetermined value, the control device 9 determines that the cake density in the filter chamber has increased to a predetermined value, and stops the operation of the pump 4.

図1(b)に示すように、濾板2が水平移動して中央板3から離れ、凹部2aからケーキが脱落する。ケーキ掻き落とし部材6が下方へ移動し、ブレード6aが中央板3に摺接しつつ下方へ移動して、中央板3からケーキを掻き落とす。上下方向の張力を印加された濾布5が、ケーキ掻き落とし部材6に従動して下方へ移動する。濾布5が濾板2の下端角部2bと係合して屈曲する際に、濾布5に付着したケーキが濾布5から剥離除去され、濾布5がピアノ線8と係合して屈曲する際に、濾布5上に残存するケーキが濾布5から掻き落とされる。濾布5からケーキが除去されると、ケーキ掻き落とし部材6が中央板3の上方へ移動し、濾板2が水平移動し濾布5を間に挟んで中央板3に当接し、凹部2aが密閉されて、スラリーの濾過が再開される。
スラリーの濾過と、濾過停止後のケーキ除去とが自動的に繰り返されて、スラリーの濾過が全自動で遂行される。
As shown in FIG.1 (b), the filter plate 2 moves horizontally, leaves | separates from the center plate 3, and a cake falls out from the recessed part 2a. The cake scraping member 6 moves downward, and the blade 6 a moves downward while being in sliding contact with the central plate 3 to scrape the cake from the central plate 3. The filter cloth 5 to which the tension in the vertical direction is applied follows the cake scraping member 6 and moves downward. When the filter cloth 5 is engaged with the lower end corner 2b of the filter plate 2 and bent, the cake attached to the filter cloth 5 is peeled off from the filter cloth 5, and the filter cloth 5 is engaged with the piano wire 8. When bending, the cake remaining on the filter cloth 5 is scraped off from the filter cloth 5. When the cake is removed from the filter cloth 5, the cake scraping member 6 moves above the center plate 3, the filter plate 2 moves horizontally, contacts the center plate 3 with the filter cloth 5 interposed therebetween, and the recess 2a. And sealing of the slurry is resumed.
The slurry filtration and the cake removal after the filtration stop are automatically repeated, and the slurry filtration is performed fully automatically.

一対のダイアフラムを連結するロッドの位置を検知するのに代えて、給排気に伴う圧力室の内圧変動を検知してスラリーの打ち込み回数や1回のスラリー打ち込みに要する時間を計測しても良い。
エア駆動複式ダイアフラムポンプ4において、パイロット弁に代えて電磁弁を用いて圧力室と給気路、排気路との接続を切り替えても良い。この場合、近接センサー等の位置センサーの検知信号に基づいて一対のダイアフラムを連結するロッドの位置を検知し、ロッドが一方の側へ最大変位した時に当該側の圧力室を排気路に接続し他方側の圧力室を給気路に接続し、ロッドが他方の側へ最大変位した時に当該側の圧力室を排気路に接続し他方側の圧力室を給気路に接続するように、電磁弁機構の作動を制御する。エア駆動複式ダイアフラムポンプ4をエア供給源に接続すれば、電磁弁機構の作動により、エア駆動複式ダイアフラムポンプ4は、一対のポンプ室に交互に流体を吸引し一対のポンプ室から交互に流体を吐出する動作を繰り返す。
エア駆動複式ダイアフラムポンプ4に代えて、往復動のピッチが吐出側の流路抵抗によって変動する他の構造の定吐出圧往復動ポンプを使用しても良い。
Instead of detecting the position of the rod connecting the pair of diaphragms, the variation in the internal pressure of the pressure chamber accompanying the supply / exhaust may be detected to measure the number of times of slurry driving or the time required for one slurry driving.
In the air-driven double diaphragm pump 4, the connection between the pressure chamber, the air supply path, and the exhaust path may be switched using an electromagnetic valve instead of the pilot valve. In this case, the position of the rod connecting the pair of diaphragms is detected based on a detection signal of a position sensor such as a proximity sensor, and when the rod is displaced to the maximum side, the pressure chamber on that side is connected to the exhaust path, The solenoid valve is connected so that the pressure chamber on the side is connected to the air supply passage, and when the rod is displaced to the other side to the maximum, the pressure chamber on that side is connected to the exhaust passage and the pressure chamber on the other side is connected to the air supply passage. Control the operation of the mechanism. If the air-driven double diaphragm pump 4 is connected to an air supply source, the air-driven double diaphragm pump 4 alternately sucks fluid into the pair of pump chambers and alternately draws fluid from the pair of pump chambers by the operation of the electromagnetic valve mechanism. Repeat the discharge operation.
Instead of the air-driven double diaphragm pump 4, a constant discharge pressure reciprocating pump having another structure in which the reciprocating pitch varies depending on the flow path resistance on the discharge side may be used.

本発明は、フィルタープレスに広く利用可能である。 The present invention is widely applicable to filter presses.

本発明の実施例に係る異常検知方法が実施される全自動フィルタープレスの構造図である。1 is a structural diagram of a fully automatic filter press in which an abnormality detection method according to an embodiment of the present invention is implemented.

符号の説明Explanation of symbols

1 全自動フィルタープレス
2 濾板
2a 凹部
2b 下端角部
3 中央板
3a スラリー吐出口
3b 凹部
4 エア駆動複式ダイアフラムポンプ
5、10 濾布
6 ケーキ掻き落とし部材
6a ブレード
7 錘
8 ピアノ線
9 制御装置
DESCRIPTION OF SYMBOLS 1 Fully automatic filter press 2 Filter plate 2a Recessed part 2b Lower end corner part 3 Center plate 3a Slurry discharge port 3b Recessed part 4 Air drive double diaphragm pump 5, 10 Filter cloth 6 Cake scraping member 6a Blade 7 Weight 8 Piano wire 9 Controller

Claims (4)

スラリー打ち込みポンプとして往復動定吐出圧ポンプを備えるフィルタープレスの異常検知方法であって、濾過作業毎にスラリーの高圧打ち込み開始直後の1回の打ち込みに要する時間を計測し、今回の濾過作業における高圧打ち込み開始直後の打ち込み時間T1と前回の濾過作業における高圧打ち込み開始直後の打ち込み時間T2との比T1/T2が1未満の所定値以下である場合に濾板からスラリーが漏れていると判断することを特徴とする異常検知方法。 This is an abnormality detection method for a filter press equipped with a reciprocating constant discharge pressure pump as a slurry driving pump, and measures the time required for one driving immediately after the start of high pressure driving of slurry for each filtering operation. When the ratio T1 / T2 between the driving time T1 immediately after the start of driving and the driving time T2 immediately after the start of the high pressure driving in the previous filtering operation is equal to or less than a predetermined value less than 1, it is determined that the slurry is leaking from the filter plate. An abnormality detection method characterized by 往復動定吐出圧ポンプは、ケーシングの一部と一対のダイアフラムとで形成された対峙する一対の圧力室と、ケーシングの残余部と前記一対のダイアフラムとで形成され前記一対の圧力室に隣接する一対のポンプ室と、エア供給源から供給された加圧エアを前記一対の圧力室に交互に供給排気するパイロット弁機構又は電磁弁機構と、ケーシングの前記一部を貫通して前記一対の圧力室に進入し前記一対のダイアフラムを連結するロッドと、各ポンプ室に配設された吸入弁と吐出弁とを備えるエア駆動複式ダイアフラムポンプであり、前記ロッドの往復動往復動又は圧力室の内圧変動を検知して1回のスラリー打ち込みに要する時間を計測することを特徴とする請求項1に記載の異常検知方法。 The reciprocating constant discharge pressure pump is formed of a pair of opposing pressure chambers formed by a part of a casing and a pair of diaphragms, a remaining portion of the casing and the pair of diaphragms, and is adjacent to the pair of pressure chambers. A pair of pump chambers, a pilot valve mechanism or electromagnetic valve mechanism for alternately supplying and exhausting pressurized air supplied from an air supply source to the pair of pressure chambers, and the pair of pressures penetrating the part of the casing An air-driven double diaphragm pump comprising a rod that enters the chamber and connects the pair of diaphragms, and a suction valve and a discharge valve disposed in each pump chamber, and the reciprocating motion of the rod or the internal pressure of the pressure chamber The abnormality detection method according to claim 1, wherein the time required for one slurry driving is measured by detecting the fluctuation. スラリー打ち込みポンプとしての往復動定吐出圧ポンプと、往復動定吐出圧ポンプの作動を制御する制御装置とを備え、制御装置は、濾過作業毎にスラリーの高圧打ち込み開始直後の1回の打ち込みに要する時間を計測して当該時間を記憶し、今回の濾過作業における高圧打ち込み開始直後の打ち込み時間T1と前回の濾過作業における高圧打ち込み開始直後の打ち込み時間T2との比T1/T2が1未満の所定値以下である場合に濾板からスラリーが漏れていると判断して、警報を発することを特徴とするフィルタープレス。 A reciprocating constant discharge pressure pump as a slurry driving pump and a control device for controlling the operation of the reciprocating constant discharge pressure pump are provided. The time required is measured and stored, and the ratio T1 / T2 between the driving time T1 immediately after the start of the high pressure driving in the current filtering operation and the driving time T2 immediately after the start of the high pressure driving in the previous filtering operation is less than 1. A filter press characterized by issuing an alarm when judging that slurry is leaking from the filter plate when the value is below the value. 往復動定吐出圧ポンプは、ケーシングの一部と一対のダイアフラムとで形成された対峙する一対の圧力室と、ケーシングの残余部と前記一対のダイアフラムとで形成され前記一対の圧力室に隣接する一対のポンプ室と、エア供給源から供給された加圧エアを前記一対の圧力室に交互に供給排気するパイロット弁機構又は電磁弁機構と、ケーシングの前記一部を貫通して前記一対の圧力室に進入し前記一対のダイアフラムを連結するロッドと、各ポンプ室に配設された吸入弁と吐出弁とを備えるエア駆動複式ダイアフラムポンプであり、制御装置は、前記ロッドの往復動又は圧力室の内圧変動を検知して1回のスラリー打ち込みに要する時間を計測することを特徴とする請求項3に記載のフィルタープレス。 The reciprocating constant discharge pressure pump is formed of a pair of opposing pressure chambers formed by a part of a casing and a pair of diaphragms, a remaining portion of the casing and the pair of diaphragms, and is adjacent to the pair of pressure chambers. A pair of pump chambers, a pilot valve mechanism or electromagnetic valve mechanism for alternately supplying and exhausting pressurized air supplied from an air supply source to the pair of pressure chambers, and the pair of pressures penetrating the part of the casing An air-driven double diaphragm pump including a rod that enters the chamber and connects the pair of diaphragms, and a suction valve and a discharge valve disposed in each pump chamber, and the control device includes a reciprocating motion of the rod or a pressure chamber 4. The filter press according to claim 3, wherein the time required for one driving of the slurry is measured by detecting the internal pressure fluctuation.
JP2008221052A 2008-08-29 2008-08-29 Anomaly detection method of filter press and filter press Pending JP2010051910A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013540577A (en) * 2010-08-25 2013-11-07 シェビッツ、ジェリー Fluid filtration system
US9993751B2 (en) 2008-09-24 2018-06-12 Repligen Corporation Screen filter module for alternating flow filtration
US10081788B2 (en) 2010-08-25 2018-09-25 Repligen Corporation Device, system and process for modification or concentration of cell-depleted fluid
US11156219B2 (en) 2015-11-10 2021-10-26 Repligen Corporation Disposable alternating tangential flow filtration units

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9993751B2 (en) 2008-09-24 2018-06-12 Repligen Corporation Screen filter module for alternating flow filtration
JP2013540577A (en) * 2010-08-25 2013-11-07 シェビッツ、ジェリー Fluid filtration system
US10081788B2 (en) 2010-08-25 2018-09-25 Repligen Corporation Device, system and process for modification or concentration of cell-depleted fluid
US11225637B2 (en) 2010-08-25 2022-01-18 Repligen Corporation Enclosed filtration system processes
US11156219B2 (en) 2015-11-10 2021-10-26 Repligen Corporation Disposable alternating tangential flow filtration units

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