JPS6130605B2 - - Google Patents
Info
- Publication number
- JPS6130605B2 JPS6130605B2 JP57078998A JP7899882A JPS6130605B2 JP S6130605 B2 JPS6130605 B2 JP S6130605B2 JP 57078998 A JP57078998 A JP 57078998A JP 7899882 A JP7899882 A JP 7899882A JP S6130605 B2 JPS6130605 B2 JP S6130605B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- pump
- sludge
- pouring
- driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000010802 sludge Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 12
- 230000007423 decrease Effects 0.000 claims description 4
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Landscapes
- Filtration Of Liquid (AREA)
Description
【発明の詳細な説明】
この発明はフイルタープレスの汚泥打込み方法
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for introducing sludge into a filter press.
従来、フイルタープレスの定容積ポンプによる
汚泥打込み方法は大別すると、ポンプ回転数一定
による汚泥の打込み方法とPID制御により打込み
圧を一定にする打込み方法に分けることができ
る。ここでいうPID制御とは目標打込み圧力と実
際の打込み圧力との誤差に基づいて打込みポンプ
の回転数を制御する方法である。 Conventional sludge injection methods using constant volume pumps in filter presses can be broadly divided into sludge injection methods that use a constant pump rotation speed and sludge injection methods that use PID control to maintain a constant sludge injection pressure. The PID control referred to here is a method of controlling the rotation speed of the driving pump based on the error between the target driving pressure and the actual driving pressure.
ところで、PID制御による汚泥打込み時はポン
プを停止の状態から駆動させるため、ポンプ回転
数の上昇に時間がかかりロスタイムがあるうえ
に、目標圧力値に達した後、モータの回転数が制
御範囲外になるとポンプが停止してON−OFF運
転となり、モータの過負荷および目標打込み圧力
値近傍での打込み圧力の変動が大きく脱水効率の
点で問題がある。さらに、圧力上昇勾配が全体的
にゆるやかになるため、脱水作用一サイクルの作
業時間が長くなる問題がある。 By the way, when pumping sludge using PID control, the pump is driven from a stopped state, so it takes time to increase the pump rotation speed, resulting in loss time, and after reaching the target pressure value, the motor rotation speed is out of the control range. When this happens, the pump stops and goes into ON-OFF operation, resulting in overload of the motor and large fluctuations in the charging pressure near the target charging pressure value, causing problems in terms of dewatering efficiency. Furthermore, since the pressure increase gradient becomes gentler overall, there is a problem that the working time for one cycle of dehydration action becomes longer.
一方、ポンプ回転数一定による汚泥の打込み
は、目標打込み圧力に近くなつても圧力上昇勾配
がゆるやかにならないため、打込み圧力が異常に
高くなつて濾板が破損する等の問題もある。 On the other hand, when sludge is charged at a constant pump rotational speed, the pressure increase gradient does not become gentle even when the pumping pressure is close to the target injection pressure, so there are problems such as the charging pressure becoming abnormally high and damaging the filter plate.
この発明は、以上の問題点を解消することを目
的とし、打込み初期は所定の打込み圧力になるま
で打込みポンプの回転数を一定にして打込み、そ
の所定の打込み圧力になつた後は、PID制御を行
なうとともに、モータの回転数が減少して所定の
回転数になると、それ以下の回転数にならないよ
うにその回転数を維持するようにしたのである。 The purpose of this invention is to solve the above-mentioned problems.In the initial stage of driving, the driving pump is driven at a constant rotational speed until it reaches a predetermined driving pressure.After the driving pressure reaches the predetermined driving pressure, the PID control is applied. In addition, when the rotational speed of the motor decreases to a predetermined rotational speed, that rotational speed is maintained so that the rotational speed does not drop below that level.
以下、実施例を添付図面に基づいて説明する。 Hereinafter, embodiments will be described based on the accompanying drawings.
第１図に示すように、凝集混合槽１に開閉弁２
を介して打込みポンプ３の吸入側を接続するとと
もにポンプ３の吐出側に逆止弁４、流量計５及び
開閉弁６を介してフイルタープレス７を接続して
ポンプ３により、凝集混合槽１から汚泥をフイル
タープレス７に打込み可能とする。 As shown in FIG.
The suction side of the dosing pump 3 is connected through the pump 3, and the filter press 7 is connected to the discharge side of the pump 3 through the check valve 4, the flow meter 5, and the on-off valve 6. Sludge can be poured into a filter press 7.
ポンプ３からフイルタープレス７への管路には
汚泥打込み圧力検出器８が付設され、この検出器
８の検出値が制御器９に導びかれ、制御器９によ
り前記検出値に基づきポンプ３が制御される。ま
た、ポンプ３からフイルタープレス７への管路に
はリリーフ弁１０を介設した管が分岐され、この
管は実像のごとく凝集混合槽１又は点線のごとく
ポンプ３への管路に接続され、このリリーフ弁１
０により打込み圧力が一定値以上にならないよう
になつている。このリリーフ圧は、目標打込み圧
以上で、ポンプ３が負荷により焼損することがな
く、かつ打込配管およびフイルタープレス７がそ
の圧力で破損することがない圧力に設定する。 A sludge charging pressure detector 8 is attached to the pipe line from the pump 3 to the filter press 7, and the detected value of this detector 8 is guided to a controller 9, and the controller 9 controls the pump 3 based on the detected value. controlled. In addition, a pipe with a relief valve 10 is branched from the pipe line from the pump 3 to the filter press 7, and this pipe is connected to the coagulation mixing tank 1 as shown in the real image or to the pipe line to the pump 3 as shown by the dotted line, This relief valve 1
0 prevents the implanting pressure from exceeding a certain value. This relief pressure is set at a pressure that is equal to or higher than the target driving pressure so that the pump 3 will not burn out due to the load, and the driving piping and the filter press 7 will not be damaged by the pressure.
つぎに上記実施例の作用を第２図を参照して説
明する。 Next, the operation of the above embodiment will be explained with reference to FIG.
いま、開閉弁２，６を開き、ポンプ３を一定の
回転数例えば最大回転数で駆動させると、ポンプ
３から吐出した汚泥は流量計５を通つてフイルタ
ープレス７に打込まれる。その打込み圧力を検出
器８で検出し、その圧力が一定値例えば２Kg／cm2
に達すると、制御器９はPID制御を行ない始め、
目標打込み圧力例えば５Kg／cm2に打込み圧力を至
らせて打込み作用を続行する。 Now, when the on-off valves 2 and 6 are opened and the pump 3 is driven at a constant rotation speed, for example, the maximum rotation speed, the sludge discharged from the pump 3 is driven into the filter press 7 through the flow meter 5. The implanting pressure is detected by the detector 8, and the pressure is set to a constant value, for example, 2 kg/cm 2
When it reaches , the controller 9 starts to perform PID control,
The driving operation is continued by bringing the driving pressure to the target driving pressure, for example, 5 kg/cm 2 .
この打込み圧力の上昇及び汚泥濾過が進むにつ
れて、第２図に示すようりポンプ３の回転数は減
少し、濾過作用の終了近くになると、例えば過
性の悪い汚泥ではほとんど濾過されなくなるた
め、ポンプ回転数が次第に減少し、所定の回転数
にまで減少すると、それ以下の回転数にならない
ようにその回転数を維持する。これにより、ポン
プ回転数が減少し、制御範囲外になつてポンプ
が、on−off運転になることを阻止する。すなわ
ち、打込み圧力の変動がなく効率よく脱水が行な
われる。 As the charging pressure increases and sludge filtration progresses, the rotation speed of the pump 3 decreases as shown in Fig. 2, and near the end of the filtration action, for example, sludge with poor permeability is hardly filtered; The number of rotations gradually decreases, and when it reaches a predetermined number of rotations, the number of rotations is maintained so as not to fall below that number. This reduces the pump rotational speed and prevents the pump from going into on-off operation due to being out of the control range. That is, there is no fluctuation in the driving pressure, and dewatering is carried out efficiently.
なお、前記所定回転数（最低回転数）は、フイ
ルタープレスの性能、汚泥の性状等を考慮して実
験等により適宜に決定する。 The predetermined rotational speed (minimum rotational speed) is appropriately determined through experiments, taking into consideration the performance of the filter press, the properties of the sludge, and the like.
打込み工程終了後は、開閉弁６を閉じて圧搾工
程又は開板工程へと移行する。 After the driving process is completed, the on-off valve 6 is closed and the process moves to the pressing process or the plate opening process.
以上のように、この発明の汚泥打込み方法によ
ると、フイルタープレスに汚泥を打込むに際し、
打込み初期は所定の打込み圧力になるまで打込み
ポンプの回転数を一定にして打込み、その所定の
打込み圧力になつた後は、目標の打込み圧力にな
るようにポンプを制御するように成したので、打
込み初期から大量の汚泥を供給でき、濾板を破損
する危倶もなく、打込み圧力目標値近傍での圧力
変動も少ない。よつて、効率のよい脱水作用を行
ない得る効果がある。 As described above, according to the sludge injection method of the present invention, when sludge is poured into the filter press,
At the initial stage of driving, the number of revolutions of the driving pump is kept constant until a predetermined driving pressure is reached, and after the driving pressure reaches the specified driving pressure, the pump is controlled so that the target driving pressure is reached. A large amount of sludge can be supplied from the initial stage of charging, there is no risk of damaging the filter plate, and there is little pressure fluctuation around the target charging pressure value. Therefore, there is an effect that efficient dehydration can be performed.
第１図はこの発明の汚泥打込み方法の一実施例
の概略配管図、第２図はポンプ回転数及び打込み
圧力の経時変化を示す関係図である。
１……凝集混合槽、２，６……開閉弁、３……
打込みポンプ、５……流量計、７……フイルター
プレス、８……打込み圧力検出器、９……制御
器。
FIG. 1 is a schematic piping diagram of an embodiment of the sludge charging method of the present invention, and FIG. 2 is a relationship diagram showing changes over time in pump rotational speed and charging pressure. 1... Coagulation mixing tank, 2, 6... Open/close valve, 3...
Driving pump, 5...flow meter, 7...filter press, 8... driving pressure detector, 9...controller.
Claims (1)
込み初期は打込み圧力になるまで打込みポンプの
回転数を一定にして打込み、その所定の打込み圧
力になつた後は、目標の打込み圧力と実際の打込
み圧力との誤差に基づき、その目標の打込圧力に
なるようにポンプの回転数を制御するとともに、
所定の回転数にまでで減少すると、それ以下の回
転数にならないようにその回転数を維持するよう
に成したことを特徴とするフイルタープレスの汚
泥打込み方法。1. When pouring sludge into a filter press, at the initial stage of pouring, the rotation speed of the pouring pump is kept constant until the pouring pressure is reached, and after the specified pouring pressure is reached, the target pouring pressure and the actual pouring pressure are Based on the error, the pump rotation speed is controlled to achieve the target driving pressure, and
A method for introducing sludge into a filter press, characterized in that when the number of revolutions decreases to a predetermined number, the number of revolutions is maintained so that the number of revolutions does not fall below that number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57078998A JPS58193708A (en) | 1982-05-08 | 1982-05-08 | How to pour sludge into a filter press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57078998A JPS58193708A (en) | 1982-05-08 | 1982-05-08 | How to pour sludge into a filter press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58193708A JPS58193708A (en) | 1983-11-11 |
| JPS6130605B2 true JPS6130605B2 (en) | 1986-07-15 |
Family
ID=13677556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57078998A Granted JPS58193708A (en) | 1982-05-08 | 1982-05-08 | How to pour sludge into a filter press |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58193708A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6214908A (en) * | 1985-07-11 | 1987-01-23 | Ngk Insulators Ltd | Pressurizing and stopping method of filter press type filtration equipment for dewatering |
| JPH07114890B2 (en) * | 1987-03-20 | 1995-12-13 | 株式会社クボタ | Sludge driving method of filter press |
| JPH07108362B2 (en) * | 1990-03-26 | 1995-11-22 | 新日本製鐵株式会社 | High pressure filter press stock solution injection method |
| JP2007260536A (en) * | 2006-03-28 | 2007-10-11 | Parker Engineering Kk | Fully automatic filter press |
| CN103007628B (en) * | 2012-12-13 | 2015-03-25 | 浙江华章科技有限公司 | Feeding pressure and pressing pressure linkage type pressure filter control method and high-pressure pressure filter |
-
1982
- 1982-05-08 JP JP57078998A patent/JPS58193708A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58193708A (en) | 1983-11-11 |
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