JPH07114890B2 - Sludge driving method of filter press - Google Patents
Sludge driving method of filter pressInfo
- Publication number
- JPH07114890B2 JPH07114890B2 JP62066812A JP6681287A JPH07114890B2 JP H07114890 B2 JPH07114890 B2 JP H07114890B2 JP 62066812 A JP62066812 A JP 62066812A JP 6681287 A JP6681287 A JP 6681287A JP H07114890 B2 JPH07114890 B2 JP H07114890B2
- Authority
- JP
- Japan
- Prior art keywords
- driving
- pressure
- sludge
- pump
- rotation speed
- 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.
従来、フィルタープレスの汚泥打込みに、定容積ポンプ
を使用する場合、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PID
制御しており、打込みを開始して打込み圧力が目標圧力
に達するまでの間は、第２図に示すように、ポンプの回
転数が最大回転数を維持するようにし、打込み圧力が目
標圧力に達した時点でポンプの回転数を徐々に低下させ
るように制御している。Conventionally, when a constant volume pump was used to drive sludge into a filter press, a target pressure for driving was set, and the pump rotation speed was set to PID so that the actual driving pressure would reach the target pressure.
During control, until the driving pressure starts to reach the target pressure, as shown in Fig. 2, the pump rotation speed is maintained at the maximum rotation speed, and the driving pressure reaches the target pressure. When it reaches, the pump speed is controlled to be gradually reduced.
ところが、上記のように、打込み圧力が目標圧力に達し
た時点で、ポンプの回転数を低下させても、実際の打込
み圧力はその後も若干の間上昇し、目標圧力よりも高く
なり、この打込み圧力のオーバーシュートによって濾板
間から汚泥が吹き出す等の問題が生ずる可能性がある。However, as described above, when the driving pressure reaches the target pressure, even if the pump speed is reduced, the actual driving pressure will continue to rise for a while and become higher than the target pressure. The pressure overshoot may cause problems such as sludge blowing out from between the filter plates.
そこで、この発明は、上記のような汚泥打込み圧力の目
標圧力に対するオーバーシュートを防止することができ
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 is to provide a sludge driving method capable of preventing the above-mentioned sludge driving pressure from overshooting the target pressure.
この発明は、上記の問題点を解消するために、汚泥打込
みポンプを最大回転数で運転して汚泥の打込みを開始
し、打込み圧力が目標圧力に到達する前にポンプの回転
数を最大回転数から徐々に低下させて打込み圧力を目標
圧力に到達させるようにしたものである。In order to solve the above problems, the present invention operates the sludge driving pump at the maximum rotation speed to start sludge driving, and sets the pump rotation speed to the maximum rotation speed before the driving pressure reaches the target pressure. The pressure is gradually decreased to reach the target pressure.
最大回転数で運転していたポンプの回転数を、ある時点
で若干低下させても、実際の打込み圧力はその後も若干
の間は上昇を続ける。Even if the rotational speed of the pump operating at the maximum rotational speed is slightly decreased at some point, the actual driving pressure continues to increase for some time thereafter.
したがって、打込み圧力が目標圧力に到達する前にポン
プの回転数を最大回転数から徐々に下げていけば、打込
み圧力を、目標圧力を大幅に越えることなく目標圧力に
到達させることができる。Therefore, if the rotational speed of the pump is gradually decreased from the maximum rotational speed before the driving pressure reaches the target pressure, the driving pressure can reach the target pressure without significantly exceeding the target pressure.
第１図に示す実施例では、打込みの目標圧力を15Kg/cm2
に設定し、ポンプを最大回転数で７時間、打込み圧力が
約8Kg/cm2に到達するまで運転し、それ以後は最大回転
数を１時間当たり10％低下するようにポンプを運転して
いる。In the embodiment shown in FIG. 1, the target pressure for driving is 15 kg / cm 2
The pump is operated at the maximum rotation speed for 7 hours until the driving pressure reaches about 8 kg / cm 2 , and thereafter the pump is operated so that the maximum rotation speed is reduced by 10% per hour. .
この実施例では、8.8時間で目標圧力に到達し、オーバ
ーシュートもほとんど発生していない。In this example, the target pressure was reached in 8.8 hours, and almost no overshoot had occurred.
この発明によれば、以上のように、汚泥打込みの際にお
ける打込み圧力が目標圧力を大幅に越えるということを
防止することができるという効果がある。According to the present invention, as described above, there is an effect that it is possible to prevent the driving pressure at the time of driving sludge from significantly exceeding the target pressure.
第１図はこの発明による汚泥打込み方法のポンプ回転数
と打込み圧力との関係を示すグラフ、第２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 the relationship between the pump rotational speed and the driving pressure in the sludge driving method according to the present invention, and FIG. 2 is a graph showing the relationship between the pump rotational speed and the driving pressure according to the conventional method.
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 Continuation of front page (51) Int.Cl. 6 Identification number Office reference number FI Technical display location B01D 33/70 C02F 11/12 ZAB C
Claims (1)
汚泥の打込みを開始し、打込み圧力が目標圧力に到達す
る前にポンプの回転数を最大回転数から徐々に低下させ
て打込み圧力を目標圧力に到達させるフィルタープレス
の汚泥打込み方法。1. A sludge driving pump is operated at the maximum rotation speed to start sludge driving, and the rotation speed of the pump is gradually decreased from the maximum rotation speed before the driving pressure reaches a target pressure to reduce the driving pressure. Sludge driving method of filter press to reach target pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62066812A JPH07114890B2 (en) | 1987-03-20 | 1987-03-20 | Sludge driving method of filter press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62066812A JPH07114890B2 (en) | 1987-03-20 | 1987-03-20 | Sludge driving method of filter press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63232811A JPS63232811A (en) | 1988-09-28 |
| JPH07114890B2 true JPH07114890B2 (en) | 1995-12-13 |
Family
ID=13326639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62066812A Expired - Lifetime JPH07114890B2 (en) | 1987-03-20 | 1987-03-20 | Sludge driving method of filter press |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07114890B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104649561B (en) * | 2015-02-10 | 2016-03-16 | 河南百汇环保科技股份有限公司 | A kind of pressing method of variable displacement type pressure filter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58193708A (en) * | 1982-05-08 | 1983-11-11 | Kubota Ltd | How to pour sludge into a filter press |
-
1987
- 1987-03-20 JP JP62066812A patent/JPH07114890B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63232811A (en) | 1988-09-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |