JPH0763567B2 - Sludge driving method of filter press - Google Patents
Sludge driving method of filter pressInfo
- Publication number
- JPH0763567B2 JPH0763567B2 JP62066813A JP6681387A JPH0763567B2 JP H0763567 B2 JPH0763567 B2 JP H0763567B2 JP 62066813 A JP62066813 A JP 62066813A JP 6681387 A JP6681387 A JP 6681387A JP H0763567 B2 JPH0763567 B2 JP H0763567B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- driving
- pump
- sludge
- driving pressure
- 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 - Lifetime
Links
Landscapes
- Filtration Of Liquid (AREA)
- Treatment Of Sludge (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、フィルタープレスの汚泥打込み方法に関す
る。TECHNICAL FIELD The present invention relates to a sludge driving method for a filter press.
フィルタープレスの汚泥打込みポンプに定容積ポンプを
使用する場合は、打込みの目標圧力を設定し、実際の打
込み圧力が目標圧力になるようにポンプの回転数を制御
しなければならない。When using a constant volume pump as the sludge driving pump of the filter press, it is necessary to set a target pressure for driving and to control the rotational speed of the pump so that the actual driving pressure becomes the target pressure.
従来は、目標圧力と実際の打込み圧力を比較し、打込み
圧力が目標圧力よりも低い場合にはポンプの回転数を高
くし、打込み圧力が目標圧力よりも高い場合にはポンプ
の回転数を低くするようにPID制御を行なっている。Conventionally, the target pressure is compared with the actual driving pressure, and if the driving pressure is lower than the target pressure, the pump speed is increased, and if the driving pressure is higher than the target pressure, the pump speed is decreased. PID control is performed so that it does.
ところで、第３図に示すように、汚泥の打込みを開始
し、打込み圧力が目標圧力に達すると、ポンプの回転数
を最大回転数から徐々に低下させて、打込み圧力が目標
圧力を越えないように制御されているが、濾室内のケー
キの形成状況、形成ムラ等に起因して打込み圧力が低下
すると、従来の制御方法ではポンプの回転数が急に上げ
られるので、ポンプの回転数がハンチングを起こし、打
込み圧力が不安定になるという問題がある。By the way, as shown in FIG. 3, when sludge driving is started and the driving pressure reaches the target pressure, the rotational speed of the pump is gradually decreased from the maximum rotational speed so that the driving pressure does not exceed the target pressure. However, if the driving pressure decreases due to the formation condition of cake in the filter chamber, unevenness of formation, etc., the conventional control method causes the pump speed to rise rapidly, so the pump speed is hunting. There is a problem in that the driving pressure becomes unstable.
そこで、この発明は、汚泥打込み圧力が変動しても、ポ
ンプの回転数がハンチングすることなく、安定した打込
み圧力が得られる汚泥の打込み方法を提供しようとする
ものである。Therefore, the present invention intends to provide a sludge driving method in which a stable driving pressure can be obtained without hunting the rotational speed of the pump even when the sludge driving pressure fluctuates.
この発明は、上記の問題点を解消するために、所定の間
隔で実際の打込み圧力を検出し、この圧力検出時に打込
み圧力が目標圧力よりも一定量以上高い場合に、打込み
ポンプの回転数を現状の回転数から所定量低下せしめ、
上記以外の場合はポンプの回転数を現状の回転数に維持
するようにしたのである。In order to solve the above problems, the present invention detects the actual driving pressure at predetermined intervals, and when the driving pressure is higher than the target pressure by a certain amount or more at the time of detecting this pressure, the rotation speed of the driving pump is adjusted. Reduce the current number of revolutions by a predetermined amount,
In cases other than the above, the rotation speed of the pump is maintained at the current rotation speed.
上記方法によると、何らかの原因によって打込み圧力が
急激に変動しても、ポンプの回転数は急激に変動せず、
打込み圧力が目標圧力より高い場合には、ポンプの回転
数が一定量ずつ低下して打込み圧力が目標圧力に近づけ
られるので、ポンプの回転数がハンチングせず、安定し
た打込み圧力が得られる。According to the above method, even if the driving pressure changes suddenly for some reason, the rotation speed of the pump does not change rapidly.
When the driving pressure is higher than the target pressure, the rotational speed of the pump decreases by a fixed amount and the driving pressure approaches the target pressure, so that the rotational speed of the pump does not hunt and a stable driving pressure is obtained.
第１図に示す実施例では、打込みの目標圧力を14.8Kg/c
m2に設定し、一定の時間毎に実際の打込み圧力を検出
し、打込み圧力が目標圧力よりも0.2Kg/cm2以上高くな
ると、ポンプの回転数を50rpm低くするようにしたもの
である。In the embodiment shown in FIG. 1, the target pressure for driving is 14.8 Kg / c.
When the driving pressure is set to m 2 and the actual driving pressure is detected at regular intervals and the driving pressure becomes 0.2 Kg / cm 2 or more higher than the target pressure, the rotational speed of the pump is reduced by 50 rpm.
第２図に示す実施例は、一定の間隔毎に、一定時間圧力
を検出し、圧力検出区間内で実際の打込み圧力が15Kg/c
m2以上の時に、ポンプの回転数を徐々に低くするように
したものである。In the embodiment shown in FIG. 2, the pressure is detected at a constant interval for a fixed time, and the actual driving pressure is 15 Kg / c within the pressure detection section.
The pump rotation speed is gradually lowered when m 2 or more.
また、この発明の方法とPID制御とを組合せて行なうこ
ともでき、例えば、打込みを開始し、打込み圧力が目標
圧力に達するまでの間はPID制御によってポンプを制御
し、打込み圧力が目標圧力に到達した後はこの発明の方
法によってポンプを制御するようにしてもよい。It is also possible to combine the method of the present invention with PID control, for example, starting the driving, controlling the pump by the PID control until the driving pressure reaches the target pressure, and setting the driving pressure to the target pressure. Once reached, the pump may be controlled by the method of the present invention.
この発明は以上の如きものであるから、次のような効果
がある。Since the present invention is as described above, it has the following effects.
（１） ポンプの回転数が安定するので、ポンプの回転
数のハンチングを防止することができ、汚泥打込み圧力
が安定化する。(1) Since the rotation speed of the pump is stable, hunting of the rotation speed of the pump can be prevented, and the sludge driving pressure is stabilized.
（２） 汚泥打込み圧力が急に高くならないので、汚泥
の濾板間からの吹出しを防止することができる。(2) Since the sludge driving pressure does not suddenly increase, it is possible to prevent the sludge from being blown out between the filter plates.
第１図はこの発明によるポンプの回転数の時間的変化を
示すグラフ、第２図はこの発明の他の例によるポンプの
回転数の時間的変化を示すグラフ、第３図は従来法によ
るポンプ回転数と打込み圧力との関係を示すグラフであ
る。FIG. 1 is a graph showing a change with time of the rotational speed of a pump according to the present invention, FIG. 2 is a graph showing a change with time of the rotational speed of a pump according to another example of the present invention, and FIG. 3 is a pump according to a conventional method. It is a graph which shows the relationship between rotation speed and driving pressure.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ０１Ｄ 33/70 Ｃ０２Ｆ 11/12 ＺＡＢ Ｃ 7446−4Ｄ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location B01D 33/70 C02F 11/12 ZAB C 7446-4D
Claims (1)
し、この圧力検出時に打込み圧力が目標圧力より一定量
以上高い場合に、打込みポンプの回転数を現状の回転数
から所定量低下せしめ、上記以外の場合にはポンプの回
転数を現状の回転数に維持しながせ汚泥を打込むフィル
タープレスの汚泥打込み方法。1. An actual sludge driving pressure is detected at a predetermined interval, and when the driving pressure is higher than a target pressure by a certain amount or more when the pressure is detected, the rotation speed of the driving pump is decreased from the current rotation speed by a predetermined amount. In the cases other than the above, the sludge driving method of the filter press in which sludge is driven while keeping the pump rotational speed at the current rotational speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62066813A JPH0763567B2 (en) | 1987-03-20 | 1987-03-20 | Sludge driving method of filter press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62066813A JPH0763567B2 (en) | 1987-03-20 | 1987-03-20 | Sludge driving method of filter press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63232812A JPS63232812A (en) | 1988-09-28 |
| JPH0763567B2 true JPH0763567B2 (en) | 1995-07-12 |
Family
ID=13326669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62066813A Expired - Lifetime JPH0763567B2 (en) | 1987-03-20 | 1987-03-20 | Sludge driving method of filter press |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0763567B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119021794A (en) * | 2024-08-23 | 2024-11-26 | 潍柴动力股份有限公司 | Electric pump control method, device and vehicle for fuel system |
-
1987
- 1987-03-20 JP JP62066813A patent/JPH0763567B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63232812A (en) | 1988-09-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |