JP3326784B2 - Dewatering method of slurry in filter press - Google Patents
Dewatering method of slurry in filter pressInfo
- Publication number
- JP3326784B2 JP3326784B2 JP21429296A JP21429296A JP3326784B2 JP 3326784 B2 JP3326784 B2 JP 3326784B2 JP 21429296 A JP21429296 A JP 21429296A JP 21429296 A JP21429296 A JP 21429296A JP 3326784 B2 JP3326784 B2 JP 3326784B2
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- filtration chamber
- filter
- press
- supply
- 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 - Fee Related
Links
Landscapes
- Filtration Of Liquid (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、上水道等の処理
場で発生するスラリーの処理方法に関し、特に、ろ過室
に圧入したスラリーを直接加温し、圧搾時の脱水性を向
上させる汚泥の処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating slurry generated in a treatment plant such as a water supply system, and more particularly to a method for treating sludge by directly heating a slurry press-fitted into a filtration chamber and improving dewatering property during pressing. About the method.
【０００２】[0002]
【従来の技術】従来、フィルタプレスの脱水性を向上す
るために、給泥タンクの熱処理汚泥をフィルタプレスに
圧送して脱水する方法は、例えば、特開昭５９−６９１
３号公報に記載されているように公知である。また、ろ
過室を形成するろ板の内面に加熱装置を設け、ろ過室に
圧入したスラリーを加熱する装置も本願出願人は実公平
３−２３２８８号公報で提案している。2. Description of the Related Art Conventionally, in order to improve the dewatering property of a filter press, a method of dehydrating heat-treated sludge from a mud feed tank by pressure feeding to a filter press is disclosed in, for example, JP-A-59-691.
It is known as described in Japanese Patent Publication No. The applicant of the present invention has also proposed a device for providing a heating device on the inner surface of a filter plate forming a filtration chamber and heating the slurry pressed into the filtration chamber in Japanese Utility Model Publication No. 3-23288.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
熱処理汚泥をフィルタプレスに圧入する方法において
は、汚泥に含有する有機物の性状が変化し、脱水性は向
上するものであるが、汚泥の加熱装置と貯留タンク等の
附帯設備が必要であり、フィルタプレスに圧入された汚
泥は温度が低下して、汚泥の粘性が増加し、ろ過性が減
少する恐れがあった。また、ろ板に加熱装置を設けたも
のにあっては、ろ過室のスラリーを直接加温できるもの
であるが、ろ布やダイアフラムを介して加温するために
効率が悪い欠点があった。However, in the conventional method of press-fitting heat-treated sludge into a filter press, the properties of organic substances contained in the sludge change and the dewatering property is improved. And additional equipment such as a storage tank, etc., and the temperature of the sludge pressed into the filter press is lowered, the viscosity of the sludge increases, and the filterability may decrease. Further, in the case where the filter plate is provided with a heating device, the slurry in the filtration chamber can be directly heated, but there is a disadvantage that the efficiency is low because the slurry is heated through the filter cloth or the diaphragm.
【０００４】[0004]
【課題を解決するための手段】この発明は、上述の従来
の課題を解決するものであって、その要旨とするところ
は、ろ板間に形成したろ過室にスラリーを圧入し、スラ
リーの供給路の残液を排出した後、ろ板の供給路からス
チームまたは温水をろ過室に送入してスラリーを直接加
温し、汚泥の粘性の低下と比抵抗の低下により、脱水性
を向上させ、次に、ろ過室のスラリーを圧搾脱水して、
脱水時間の短縮と脱水性を向上させたものである。SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned conventional problems, and the gist of the invention is to press-fit a slurry into a filtration chamber formed between filter plates and supply the slurry. After discharging the residual liquid from the passage, steam or hot water is fed into the filtration chamber from the supply passage of the filter plate to directly heat the slurry, and the dewaterability is improved by lowering the viscosity of sludge and lowering the specific resistance. Then, the slurry in the filtration chamber is squeezed and dewatered,
The dehydration time is shortened and dehydration is improved.
【０００５】[0005]
【発明の実施の形態】上述のように、この発明において
は、ろ過室に圧入した汚泥に直接スチームまたは温水を
供給し、汚泥の粘性と比抵抗を低下させた後、圧搾脱水
するので圧搾ケーキの含水率を低下させることができ
る。即ち、ろ板間に形成したろ過室にスラリーを圧入す
ると、スラリーは濃縮されながらろ過室に充満する。そ
して、スラリーの圧入を停止し、原液供給口に残ってい
るスラリーを排除し、原液供給口からスチームまたは温
水をろ過室に供給すると、スラリーは粘性と比抵抗が低
下してくる。次に、加温されたスラリーを圧搾すると、
固液分離が行なわれ、圧搾時間の短縮と含水率の低いケ
ーキを得ることができる。DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, in the present invention, steam or hot water is directly supplied to sludge pressed into a filtration chamber to reduce the viscosity and specific resistance of the sludge, and then the dewatered water is pressed and dewatered. Can be reduced. That is, when the slurry is pressed into the filtration chamber formed between the filter plates, the slurry fills the filtration chamber while being concentrated. Then, when the injection of the slurry is stopped, the slurry remaining in the stock solution supply port is eliminated, and steam or hot water is supplied from the stock solution supply port to the filtration chamber, the viscosity and specific resistance of the slurry decrease. Next, when the heated slurry is pressed,
Solid-liquid separation is performed, and a cake with a short pressing time and a low moisture content can be obtained.
【０００６】[0006]
【実施例】この発明を実施例に基づき詳述すると、符号
１はフィルタプレスであって、多数のろ板２…が並列さ
れている。これらのろ板２…は中凹状のろ過床３を有す
るろ板２ａと、圧搾用のダイアフラム４を有するろ板２
ｂとが交互に並列されており、そのろ板２ａ・２ｂのろ
過面にはろ液溝が設けられている。ろ板２ａ・２ｂの前
面には一対のろ布５・５が吊設されており、このろ布５
・５間に形成したろ過室６に、スラリーを供給するよう
にしてある。符号７はそれぞれのろ板２ａ・２ｂに設け
たスラリーの供給口であって、多数のろ板２…を閉板し
た時に、前後の供給口７・７が連通し、一連のスラリー
の供給路８が形成されるようになっており、この供給路
８の始端部には、スラリーの供給管９が連結されてい
る。符号１０はスラリー貯留用の原液槽であって、圧入
ポンプ１１でスラリーを供給管９に移送するようになっ
ており、移送されたスラリーはろ板２の原液供給口７を
通ってろ過室６に圧入され、水分はろ布５により分離さ
れるようになっており、スラリーは濃縮される。そし
て、分離されたろ液は、ろ板２ａ・２ｂのろ液溝を流下
して、ろ板２ａ・２ｂの下方に設けたろ液排出口１２よ
り取り出される。符号１３はボイラーであって、スラリ
ーの供給管９に分岐管で連結してあり、スチームまたは
温水をろ過室６に供給し、ろ過室６のスラリーを直接８
０度前後の温度に昇温させるようにしてある。符号１４
は返送管であって、スラリーをろ過室６に供給した後、
供給路８に残存するスラリーを原液槽１０に返送し、給
液口７とろ過室６の間にあるスラリーをろ過室６に押し
込むために圧縮空気を供給するようにしてある。なお、
符号１５はろ布５の支持ロールである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to an embodiment. These filter plates 2 are composed of a filter plate 2a having a hollow filter bed 3 and a filter plate 2 having a diaphragm 4 for pressing.
b are alternately arranged in parallel, and a filtration groove is provided on the filtration surface of each of the filter plates 2a and 2b. A pair of filter cloths 5.5 are suspended from the front surface of the filter plates 2a and 2b.
The slurry is supplied to the filtration chamber 6 formed between the five. Reference numeral 7 denotes a slurry supply port provided in each of the filter plates 2a and 2b. When a large number of filter plates 2 are closed, the front and rear supply ports 7 communicate with each other to form a series of slurry supply paths. A slurry supply pipe 9 is connected to the start end of the supply path 8. Reference numeral 10 denotes a stock solution tank for storing the slurry, which is configured to transfer the slurry to a supply pipe 9 by a press-fit pump 11, and the transferred slurry passes through a stock solution supply port 7 of the filter plate 2 to a filtration chamber 6. It is press-fitted, the water is separated by the filter cloth 5, and the slurry is concentrated. Then, the separated filtrate flows down the filtrate grooves of the filter plates 2a and 2b and is taken out from a filtrate outlet 12 provided below the filter plates 2a and 2b. Reference numeral 13 denotes a boiler, which is connected to a slurry supply pipe 9 by a branch pipe, supplies steam or hot water to the filtration chamber 6, and directly supplies the slurry in the filtration chamber 6 to the slurry.
The temperature is raised to about 0 degrees. Code 14
Is a return pipe, after supplying the slurry to the filtration chamber 6,
The slurry remaining in the supply path 8 is returned to the stock solution tank 10, and compressed air is supplied to push the slurry between the liquid supply port 7 and the filtration chamber 6 into the filtration chamber 6. In addition,
Reference numeral 15 denotes a support roll for the filter cloth 5.
【０００７】[0007]
【表１】 [Table 1]
【０００８】この発明に係るスラリーの脱水処理方法の
装置は上記のように構成してあり、表１に基づき、その
脱水処理方法を説明すると、（１）バルブＶ１を開、Ｖ
２、Ｖ３、Ｖ４、Ｖ５を閉とし、原液槽１０からスラリ
ーを圧入ポンプ１１で供給管９に供給すると、スラリー
は給液口７からろ板２ａ・２ｂに吊設された一対のろ布
５・５間に圧入され、水分はろ布５で分離されろ過室６
に濃縮スラリーが貯留される。やがて、ろ過室６にスラ
リーが充満すると、圧入ポンプ１１の運転を停止する。
（２）次に、バルブＶ２、Ｖ４を開、Ｖ１、Ｖ３、Ｖ５
を閉とし、返送管１４より圧縮空気を供給路８の後端か
ら吹き込み、供給路８に残っているスラリーを供給管９
から原液槽１０に返送する。（３）そして、バルブＶ４
を開、Ｖ１、Ｖ２、Ｖ３、Ｖ５を閉とし、返送管１４よ
り圧縮空気をろ過室６に吹き込んでろ過室６の入口部の
スラリーを圧入し、圧縮空気はろ布５を通過して、ろ液
排出口１２から一部のろ液とともに排出される。[0008] The apparatus of the slurry dewatering method according to the present invention is configured as described above. The dewatering method will be described with reference to Table 1. (1) Open the valve V1;
2, V3, V4, and V5 are closed, and the slurry is supplied from the stock solution tank 10 to the supply pipe 9 by the press-fit pump 11, and the slurry is supplied from the liquid supply port 7 to the pair of filter cloths 5 suspended from the filter plates 2a and 2b.・ Pressurized between 5 and water is separated by filter cloth 5 and filtered
The concentrated slurry is stored. Eventually, when the filtration chamber 6 is filled with the slurry, the operation of the press-fit pump 11 is stopped.
(2) Next, the valves V2 and V4 are opened, and V1, V3 and V5
Is closed, compressed air is blown from the rear end of the supply path 8 through the return pipe 14, and the slurry remaining in the supply path 8 is
To the stock solution tank 10. (3) And valve V4
Is opened, V1, V2, V3, and V5 are closed, compressed air is blown into the filtration chamber 6 from the return pipe 14, and the slurry at the inlet of the filtration chamber 6 is pressed in. The compressed air passes through the filter cloth 5, The liquid is discharged from the liquid discharge port 12 together with a part of the filtrate.
【０００９】（４）上述の余分なスラリーを取り除いた
後、バルブＶ３を開、Ｖ１、Ｖ２、Ｖ４、Ｖ５を閉とし
て、ボイラー１３からスチームまたは温水を供給管９に
送り込むと、スラリーの供給口７から各々のろ過室６…
に熱源が均等に供給され、濃縮スラリーを直接加温し、
８０度前後に昇温させる。高温となったスラリーは、粘
性と比抵抗が低下し、同時に雑菌や種子も死滅する。ス
ラリーを加温したスチームは温水となり、または温水は
温度を降下させ、ろ布５を介してろ液排出口１２から取
り出される。（５）そして、最後に圧搾水供給用のバル
ブＶ５を開、Ｖ１、Ｖ２、Ｖ３、Ｖ４を閉として、加温
されて汚泥性状の変化したろ過室６のスラリーを、ろ板
２ｂに配設したダイアフラム４で加圧すると、粘性の低
下したスラリーの水分は圧搾されて、ろ布５で短時間に
分離され、含水率の低いケーキを得ることができる。(4) After removing the excess slurry, the valve V3 is opened, V1, V2, V4, and V5 are closed and steam or hot water is sent from the boiler 13 to the supply pipe 9 to supply the slurry to the slurry supply port. 7 to each filtration chamber 6 ...
Heat source is evenly supplied to directly heat the concentrated slurry,
Raise the temperature to around 80 degrees. The slurry at high temperature has reduced viscosity and specific resistance, and at the same time kills various bacteria and seeds. The steam heated from the slurry becomes hot water, or the hot water lowers the temperature, and is taken out from the filtrate outlet 12 through the filter cloth 5. (5) Finally, the valve V5 for supplying compressed water is opened, and V1, V2, V3, and V4 are closed, and the slurry in the filtration chamber 6 that has been heated and has changed sludge properties is disposed on the filter plate 2b. When pressure is applied by the diaphragm 4, the water content of the slurry having reduced viscosity is squeezed and separated in a short time by the filter cloth 5, so that a cake having a low water content can be obtained.
【００１０】[0010]
【発明の効果】上記のようにこの発明は、各ろ過室に圧
入したスラリーに直接スチームまたは温水を投入するの
で加温効率が著しく良くなるものである。即ち、従来の
熱処理汚泥をフィルタプレスに圧送して脱水する方法に
あっては、加熱処理用の附帯設備が必要であり、ろ過室
のスラリー圧送中に温度が低下し、スラリーの粘性が増
加してろ過性が減少する恐れがあった。また、従来のろ
板に加温装置を設けた間接的な加温では熱効率が悪かっ
たものであるが、この発明にあっては、ろ過室へのスラ
リー圧入終了時点に各ろ過室のスラリーを直接加温し、
スラリーの性状の変化したろ過性の良好な状態の時に圧
搾脱水するので、脱水効率が良く、特別な附帯設備も不
用となるものである。As described above, according to the present invention, steam or hot water is directly introduced into the slurry press-fitted into each filtration chamber, so that the heating efficiency is significantly improved. That is, in the conventional method of dewatering the heat-treated sludge by pressure feeding to a filter press, ancillary equipment for heat treatment is necessary, and the temperature decreases during the slurry pressure feeding of the filtration chamber, and the viscosity of the slurry increases. Therefore, the filterability may be reduced. In addition, in the conventional indirect heating in which a heating device is provided on a filter plate, the heat efficiency is poor. However, according to the present invention, the slurry in each filtration chamber is slurried at the end of the slurry injection into the filtration chamber. Heated directly,
Since the dewatering is carried out by pressing when the slurry properties change and the filterability is good, the dewatering efficiency is good and special auxiliary equipment is not required.
【図１】この発明に係るスラリーの脱水処理方法の概略
構成図である。FIG. 1 is a schematic configuration diagram of a slurry dewatering method according to the present invention.
【図２】脱水処理方法に用いる主要部のろ過室の概略縦
断面図である。FIG. 2 is a schematic vertical sectional view of a main filtration chamber used in a dehydration treatment method.
２ａ、２ｂ ろ板 ６ ろ過室 ７ 供給口 ８ 供給路 2a, 2b Filter plate 6 Filtration chamber 7 Supply port 8 Supply path
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−31300（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 25/12 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-31300 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B01D 25/12
Claims (1)
スラリーを圧入し、供給路８の残液を排出した後、ろ板
２ａ・２ｂの供給口７からスチームまたは温水をろ過室
６に送入してスラリーを直接加温し、次に、ろ過室６の
スラリーを圧搾脱水することを特長とするフィルタプレ
スにおけるスラリーの脱水処理方法。1. After the slurry is pressed into a filtration chamber 6 formed between the filter plates 2a and 2b and the residual liquid in the supply path 8 is discharged, steam or hot water is removed from a supply port 7 of the filter plates 2a and 2b. 6, the slurry is directly heated, and then the slurry in the filtration chamber 6 is pressed and dewatered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21429296A JP3326784B2 (en) | 1996-07-24 | 1996-07-24 | Dewatering method of slurry in filter press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21429296A JP3326784B2 (en) | 1996-07-24 | 1996-07-24 | Dewatering method of slurry in filter press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1033908A JPH1033908A (en) | 1998-02-10 |
| JP3326784B2 true JP3326784B2 (en) | 2002-09-24 |
Family
ID=16653316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21429296A Expired - Fee Related JP3326784B2 (en) | 1996-07-24 | 1996-07-24 | Dewatering method of slurry in filter press |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3326784B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100364482B1 (en) * | 2000-08-08 | 2002-12-12 | 주식회사 에코셋 | Membrane plate for filter press |
| KR20030013670A (en) * | 2001-08-08 | 2003-02-15 | 안광수 | filter press and filter press method |
| JP5190474B2 (en) * | 2003-11-19 | 2013-04-24 | 株式会社アクトリー | Sludge dehydration drying equipment |
| US20140319082A1 (en) * | 2011-12-28 | 2014-10-30 | Songyan Zhou | High-in fast-out efficient press filter and fast charging method |
| CN113828022B (en) * | 2021-08-31 | 2022-12-06 | 江苏沙英喜实业有限公司 | Full-automatic diaphragm filter press |
-
1996
- 1996-07-24 JP JP21429296A patent/JP3326784B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1033908A (en) | 1998-02-10 |
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