JPH0380600B2 - - Google Patents
Info
- Publication number
- JPH0380600B2 JPH0380600B2 JP59119522A JP11952284A JPH0380600B2 JP H0380600 B2 JPH0380600 B2 JP H0380600B2 JP 59119522 A JP59119522 A JP 59119522A JP 11952284 A JP11952284 A JP 11952284A JP H0380600 B2 JPH0380600 B2 JP H0380600B2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- dewatering
- section
- pressure
- dehydration
- 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
- 239000010802 sludge Substances 0.000 claims description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000018044 dehydration Effects 0.000 description 20
- 238000006297 dehydration reaction Methods 0.000 description 20
- 239000004744 fabric Substances 0.000 description 17
- 238000010586 diagram Methods 0.000 description 8
- 230000005484 gravity Effects 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/24—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using an endless pressing band
- B30B9/246—The material being conveyed around a drum between pressing bands
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Sludge (AREA)
- Filtration Of Liquid (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は下水混合生汚泥やヘドロ等のような含
水汚泥を脱水し、廃棄焼却し易くするための汚泥
脱水装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a sludge dewatering device for dewatering water-containing sludge such as sewage mixed raw sludge or sludge to facilitate disposal and incineration.
この種の汚泥脱水装置としては、第２図、第３
図に示すものが従来知られている。
This type of sludge dewatering equipment is shown in Figures 2 and 3.
What is shown in the figure is conventionally known.
第２図の脱水装置は、上部濾布１および下部濾
布２を夫々図示のように複数のロール間に掛け亘
し、この２枚の濾布間に含水汚泥を供給して圧搾
脱水するもので、従来使用されているベルトプレ
ス型の汚泥脱水装置は殆どがこのタイプのもので
ある。このタイプの汚泥脱水装置には次のような
問題がある。 The dewatering device shown in Fig. 2 has an upper filter cloth 1 and a lower filter cloth 2 each stretched between a plurality of rolls as shown in the figure, and compresses and dewaters the sludge by supplying water-containing sludge between the two filter cloths. Most of the conventionally used belt press type sludge dewatering devices are of this type. This type of sludge dewatering equipment has the following problems.
第１の問題は、一種類の濾布で汚泥の重力脱水
および加圧脱水の両方を行なうため脱水効率が低
いことである。即ち、重力脱水には濾過面積が広
く目の粗い濾布が適し、他方の加圧脱水には目の
細かい濾布が適するという相反する面があり、こ
れを一種類の濾布で賄えば当然に効率が犠牲にな
らざるを得ない。 The first problem is that the dewatering efficiency is low because one type of filter cloth performs both gravity dewatering and pressure dewatering of sludge. In other words, there are contradictory aspects in that a coarse filter cloth with a wide filtration area is suitable for gravity dehydration, while a fine filter cloth is suitable for pressure dehydration, and it is natural that one type of filter cloth can handle these problems. efficiency has to be sacrificed.
第２の問題は、重力脱水の効率が悪いことから
処理能力が小さいことである。 The second problem is that the efficiency of gravity dewatering is low, resulting in low processing capacity.
第３の問題としては、ロールに濾布を巻き付け
ただけの構造であるため、圧搾圧力は最大でも２
Kg／cm2程度で、ケーキ含水率が充分には低下しな
いことが挙げられる。 The third problem is that the structure is simply a filter cloth wrapped around a roll, so the squeezing pressure is at most 2.
One example is that the moisture content of the cake does not decrease sufficiently at around Kg/cm 2 .
次に第３図の汚泥脱水装置について説明する
と、この装置も基本的には第２図の装置と同様に
２枚の濾布１，２によるベルトプレスタイプであ
るが、ケーキの脱水率を高めるため、後段に高圧
ベルト３による高圧搾脱水機構が取り付けられて
いる。この第３図の脱水装置でも第２図の装置で
説明した第１および第２の問題は依然として解消
されずに残り、また次のような別の問題が含まれ
ている。 Next, we will explain the sludge dewatering equipment shown in Figure 3. This equipment is basically a belt press type using two filter cloths 1 and 2, similar to the equipment shown in Figure 2, but it increases the dehydration rate of the cake. Therefore, a high-pressure dewatering mechanism using a high-pressure belt 3 is installed at the rear stage. The first and second problems described in connection with the apparatus shown in FIG. 2 still remain unresolved in the dewatering apparatus shown in FIG. 3, and the following other problems are also included.
即ち、高圧搾機構を後段に設けているが、前工
程で含水率が充分に低下していない場合には後段
で高い圧力を加えることができない。無理に高圧
を加えると、ケーキのはみ出しや濾布からの目洩
れといつた問題を生じることになる。 That is, although a high compression mechanism is provided in the latter stage, high pressure cannot be applied in the latter stage if the water content has not been sufficiently reduced in the previous stage. Forcibly applying high pressure may cause problems such as cake sticking out or leaking from the filter cloth.
本発明は上記事情に鑑みてなされたもので、従
来の脱水装置に比較して脱水ケーキの含水率を大
幅に低下することができ、且つ処理能力も増大す
ることができる汚泥脱水装置を提供するものであ
る。
The present invention has been made in view of the above circumstances, and provides a sludge dewatering device that can significantly reduce the moisture content of a dehydrated cake and increase processing capacity compared to conventional dewatering devices. It is something.
本発明による汚泥脱水装置は、含水汚泥を受け
入れる予備脱水部と、予備脱水された汚泥を小塊
に分割する形成部と、低圧脱水部、中圧脱水部お
よび高圧脱水部を連続して循環する一対の無端状
濾布を有する脱水部とからなることを特徴とする
ものである。
The sludge dewatering device according to the present invention continuously circulates through a pre-dewatering section that receives water-containing sludge, a forming section that divides the pre-dewatered sludge into small lumps, a low-pressure dewatering section, a medium-pressure dewatering section, and a high-pressure dewatering section. It is characterized by comprising a dewatering section having a pair of endless filter cloths.
上記本発明の脱水装置における各部の作用を概
略的に説明すると、予備脱水部では効率良く汚泥
を予備濃縮することにより、加圧脱水する前の汚
泥の容量を小さくして実質的な処理能力を増大す
ることが可能となり、また原汚泥の濃度が変動し
た場合にも安定した運転が可能となる。 To roughly explain the function of each part in the dewatering apparatus of the present invention, the pre-dewatering section efficiently pre-concentrates sludge to reduce the volume of sludge before pressurized dewatering and increase the actual processing capacity. Moreover, stable operation is possible even when the concentration of raw sludge fluctuates.
次に、こうして予備濃縮された汚泥は形成部で
分割破砕され、ミンチ状等に形成される。これに
よつて汚泥内部の水分を効率良く排出することが
可能になると共に、引続いて行なわれる加圧脱水
時の濾液排出速度を速くすることができる。ま
た、汚泥形成部を採用したことで濾布の幅方向お
よび長さ方向でのケーキの厚みが均一になり、濾
布の皺寄りや蛇行の防止が可能になる。 Next, the sludge pre-concentrated in this way is divided and crushed in a forming section to form minced pieces or the like. This makes it possible to efficiently discharge the moisture inside the sludge, and also to increase the rate of filtrate discharge during the subsequent pressurized dewatering. Furthermore, by employing the sludge forming section, the thickness of the cake in the width direction and length direction of the filter cloth becomes uniform, making it possible to prevent wrinkles and meandering of the filter cloth.
続いて、この小塊に分割された汚泥は脱水部に
導入されて脱水ケーキが形成される。この場合、
低圧脱水部、中圧脱水部では徐々に圧力を高くし
て脱水し、高圧脱水部での処理が可能な程度にケ
ーキ含水率を充分に低下させる。また、高圧脱水
部では底圧および中圧脱水部で脱水されなかつた
水分の圧搾脱水が行われる。そして、本発明では
前記予備脱水部および形成部を設けたことによつ
て、この高圧脱水部における脱水が効果的に作用
し、全体として低含水率の脱水ケーキを効率良く
形成することが可能となつたものである。 Subsequently, the sludge divided into small lumps is introduced into a dewatering section to form a dewatering cake. in this case,
In the low-pressure dehydration section and the medium-pressure dehydration section, the pressure is gradually increased to perform dehydration, and the water content of the cake is sufficiently reduced to the extent that it can be treated in the high-pressure dehydration section. Further, in the high pressure dehydration section, water that has not been dehydrated in the bottom pressure and medium pressure dehydration sections is compressed and dehydrated. Further, in the present invention, by providing the preliminary dehydration section and the forming section, dehydration in the high-pressure dehydration section works effectively, making it possible to efficiently form a dehydrated cake with a low moisture content as a whole. It is something that has become familiar.
以下に本発明の実施例を説明する。 Examples of the present invention will be described below.
第１図は本発明の一実施例になる汚泥脱水装置
を示す説明図である。同図において、１０は予備
脱水部、２０は汚泥形成部、３０は脱水部であ
る。 FIG. 1 is an explanatory diagram showing a sludge dewatering apparatus according to an embodiment of the present invention. In the figure, 10 is a preliminary dewatering section, 20 is a sludge forming section, and 30 is a dewatering section.
この実施例において、予備脱水部１０は図示の
ようにポケツト型重力脱水機構として構成されて
いる。しかし、これ以外にも例えば第４図Ａのよ
うなフラツトな濾布１１を用いた重力脱水機構、
或いは第４図Ｂに示すドラムシツクナーを使用し
てもよい。なお、第４図Ａ中の１２は洗浄スプレ
ーであり、第４図Ｂ中の１３は汚泥供給管、１４
は汚泥シユート、１５はシヤフト、１６はスクリ
ーン、１７はスクリーン洗浄管、１８は移送用螺
線羽根である。 In this embodiment, the preliminary dehydration section 10 is constructed as a pocket-type gravity dehydration mechanism as shown. However, in addition to this, for example, a gravity dehydration mechanism using a flat filter cloth 11 as shown in FIG. 4A,
Alternatively, a drum thickener shown in FIG. 4B may be used. In addition, 12 in FIG. 4A is a cleaning spray, 13 in FIG. 4B is a sludge supply pipe, and 14
15 is a sludge chute, 15 is a shaft, 16 is a screen, 17 is a screen cleaning pipe, and 18 is a transfer spiral blade.
次に、第１図の実施例における汚泥形成部２０
について説明すると、この実施例では第５図Ａに
示す構成のロール式形成機が採用されている。即
ち、予備脱水された汚泥をホツパー２１に受け、
この汚泥をロール対２２1，２２2の噛合部に通す
ことによつて連続的な汚泥をミンチ状の小塊に分
割するようになつている。その際、汚泥は圧縮さ
れて脱水されるが、この脱水により分離された水
はロールの溝に沿つて容易に落下し、外部へ排出
される。なお、汚泥形成部２０としては、このよ
うなロール式形成機以外にも、例えば第５図Ｂ〜
Ｄに示す形成機を用いることができる。第５図Ｂ
は押出し式の形成機で、油圧等の力を利用したシ
リンダ２３で汚泥を押出してミンチ状に形成する
ものである。第５図Ｃは振動脱水による形成機
で、傾斜の付いたパンチングメタルまたは網２４
の上に汚泥を落下させ、装置を振動させることに
よつて汚泥をペレツト状に形成するものである。
また第５図Ｄは押し付け脱水による形成機で、パ
ンチングメタル製の半円筒２５の中に汚泥を供給
し、スクレーパ２６や押えローラ２７で押し付け
ることによって汚泥をうどん状に形成するもので
ある。 Next, the sludge forming section 20 in the embodiment of FIG.
To explain this, in this embodiment, a roll-type forming machine having the configuration shown in FIG. 5A is employed. That is, the pre-dehydrated sludge is received in the hopper 21,
By passing this sludge through the meshing portion of the pair of rolls 22 1 and 22 2 , the continuous sludge is divided into minced small lumps. At this time, the sludge is compressed and dewatered, and the water separated by this dewatering easily falls along the grooves of the rolls and is discharged to the outside. In addition, as the sludge forming unit 20 , in addition to such a roll-type forming machine, for example, the sludge forming unit 20 shown in FIG.
A forming machine shown in D can be used. Figure 5B
This is an extrusion-type forming machine that extrudes sludge using a cylinder 23 using hydraulic power or other force to form minced sludge. FIG.
The sludge is formed into pellets by dropping the sludge onto the surface and vibrating the device.
Further, FIG. 5D shows a forming machine using pressing dewatering, which supplies sludge into a semi-cylinder 25 made of punched metal and forms the sludge into a noodle-like shape by pressing it with a scraper 26 and a presser roller 27.
第１図の実施例における脱水部３０は、基本的
には第３図で説明した従来の汚泥脱水装置と同じ
である。即ち、上部濾布１および下部濾布２によ
るベルトプレスタイプの脱水機構が全体に採用さ
れ、後段には高圧ベルト３による高圧搾脱水部が
設けられている。高圧脱水部以外の部分は低・中
圧脱水部で、徐々に加圧力を上げて脱水を行なう
ようになつている。なお、高圧脱水部の構成とし
ては、第１図の実施例以外にも、例えば第６図Ａ
に示すように加圧濾布３１，３２及び加圧板３３
で構成してもよく、また第６Ｂに示すように加圧
ローラ３４を用いて構成してもよい。 The dewatering section 30 in the embodiment shown in FIG. 1 is basically the same as the conventional sludge dewatering apparatus described in FIG. That is, a belt press type dewatering mechanism using an upper filter cloth 1 and a lower filter cloth 2 is adopted as a whole, and a high-pressure dewatering section using a high-pressure belt 3 is provided at the rear stage. The parts other than the high-pressure dehydration section are low and medium-pressure dehydration sections, which gradually increase the pressure to perform dehydration. In addition to the configuration of the high-pressure dewatering section shown in FIG. 1, for example, the configuration shown in FIG.
As shown in FIG.
Alternatively, as shown in No. 6B, a pressure roller 34 may be used.
上記第１図の実施例になる汚泥脱水装置を用い
て下水処理混合生汚泥の脱水を行ない、そのとき
のケーキ含水率が低下する様子を調べたところ第
７図に示す結果が得られた。図から明らかなよう
に、予備脱水部１０において含水率は約90％まて
低下したところで略横ばいとなる。汚泥はこの時
点で汚泥形成部２０に移送されて分割され、その
際に含水率は更に３〜４％低下する。次いで汚泥
は脱水部３０に導入され、底・中圧脱水部で65％
程度の含水率まで脱水された後、更に高圧脱水部
では約60％の含水率が達成されることが分つた。 When sewage treatment mixed raw sludge was dehydrated using the sludge dewatering apparatus according to the embodiment shown in FIG. 1, and the manner in which the moisture content of the cake decreased at that time was investigated, the results shown in FIG. 7 were obtained. As is clear from the figure, the water content in the preliminary dehydration section 10 becomes approximately flat when it drops to about 90%. At this point, the sludge is transferred to the sludge forming section 20 and divided, where the water content is further reduced by 3-4%. The sludge is then introduced into the dewatering section 30 , where it is reduced to 65% in the bottom/medium pressure dewatering section.
It was found that after the water content has been dehydrated to a certain level, a water content of about 60% can be achieved in the high-pressure dehydration section.
以上詳述したよに、本発明の汚泥脱水装置によ
れば従来の装置では到達し得なかつた低含水率の
脱水ケーキを形成することができ、また処理能力
についても従来の装置と同等、或いはそれ以上と
することが可能である等、顕著な効果が得られる
ものである。
As detailed above, the sludge dewatering device of the present invention can form a dehydrated cake with a low water content that could not be achieved with conventional devices, and the processing capacity is equivalent to or equal to that of conventional devices. It is possible to obtain a remarkable effect such that it is possible to increase the amount more than that.
第１図は本発明による汚泥脱水装置の一実施例
を示す説明図、第２図および第３図は夫々従来の
汚泥脱水装置の説明図、第４図Ａおよび同図Ｂは
本発明の汚泥脱水装置に用いる予備脱水機の他の
例を示す説明図、第５図Ａは第１図の実施例にお
ける汚泥形成部２０の説明図であり、同図Ｂ〜Ｄ
は汚泥形成機の他の例を示す説明図、第６図Ａお
よび同図Ｂは本発明の脱水装置に用いる高圧脱水
部の他の例を示す説明図、第７図は第１図の実施
例になる汚泥脱水装置を用いて下水処理混合生汚
泥の脱水を行ない、そのときのケーキ含水率が低
下する様子を調べた結果を示す線図である。
１……上部濾布、２……下部濾布、３……高圧
ベルト、１０……予備脱水部、１１……濾布、１
２……洗浄スレー、１３……汚泥供給管、１４…
…汚泥シユート、１５……シヤフト、１６……ス
クリーン、１７……スクリーン洗浄管、１８……
移送用螺線羽根、２０……汚泥形成部、２１……
ホツパー、２２1，２２2……ロール対、２３……
シリンダー、２４……パンチングメタル（または
網）、２５……パンチングメタル製の半円筒容器、
２６……スクレーパ、２７……押えローラ、３０
……脱水部、３１，３２……濾布、３３……加圧
ローラ。
FIG. 1 is an explanatory diagram showing one embodiment of the sludge dewatering device according to the present invention, FIGS. 2 and 3 are explanatory diagrams of a conventional sludge dewatering device, respectively, and FIG. 4A and FIG. An explanatory diagram showing another example of a preliminary dehydrator used in a dehydrator, FIG. 5A is an explanatory diagram of the sludge forming part 20 in the embodiment of FIG. 1, and FIGS.
6A and 6B are explanatory diagrams showing other examples of the high-pressure dewatering section used in the dewatering apparatus of the present invention, and FIG. 7 is an explanatory diagram showing another example of the sludge forming machine. FIG. 2 is a diagram showing the results of an investigation of how the moisture content of a cake decreases when sewage treatment mixed raw sludge is dehydrated using an example sludge dewatering device. DESCRIPTION OF SYMBOLS 1... Upper filter cloth, 2... Lower filter cloth, 3... High pressure belt, 10 ... Preliminary dewatering section, 11... Filter cloth, 1
2...Cleaning sled, 13...Sludge supply pipe, 14...
...Sludge chute, 15...Shaft, 16...Screen, 17...Screen cleaning pipe, 18...
Transfer spiral vane, 20 ...Sludge forming section, 21...
Hopper, 22 1 , 22 2 ...Roll pair, 23...
Cylinder, 24...Punched metal (or mesh), 25...Semi-cylindrical container made of punched metal,
26... Scraper, 27... Presser roller, 30
... Dewatering section, 31, 32 ... Filter cloth, 33 ... Pressure roller.
Claims (1)
水された汚泥を一対のロールからなるロール式形
成機の噛合部に通すことにより小塊に分割する形
成部と、定圧脱水部、中圧脱水部および高圧脱水
部を連続して循環する一対の無端状濾布を有する
脱水部とからなり、 前記ロール式形成機の各ロール周面には円周方
向に複数の環状溝と環状凸部が交互に設けられて
おり、一対のロールは一方の環状溝と他方の環状
凸部が相互に噛合するように設けられていること
を特徴とする汚泥脱水装置。[Scope of Claims] 1. A preliminary dewatering section that receives water-containing sludge, a forming section that divides the pre-dehydrated sludge into small lumps by passing it through the meshing section of a roll forming machine consisting of a pair of rolls, and a constant pressure dewatering section. , a dewatering section having a pair of endless filter cloths that continuously circulate through a medium-pressure dewatering section and a high-pressure dewatering section, and a plurality of annular grooves and a plurality of annular grooves in the circumferential direction on the circumferential surface of each roll of the roll-forming machine. A sludge dewatering device characterized in that annular protrusions are provided alternately, and the pair of rolls are provided such that one annular groove and the other annular protrusion engage with each other.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59119522A JPS60261695A (en) | 1984-06-11 | 1984-06-11 | Sludge dehydrator |
| US06/674,543 US4657682A (en) | 1984-06-11 | 1984-11-26 | Method for dehydrating sludge |
| KR1019840007408A KR870001736B1 (en) | 1983-12-01 | 1984-11-26 | Dehydration method of sludge |
| AT84114586T ATE50196T1 (en) | 1983-12-01 | 1984-11-30 | METHOD AND APPARATUS FOR DEWATERING MUD. |
| EP84114586A EP0144090B1 (en) | 1983-12-01 | 1984-11-30 | Method and apparatus for dehydrating sludge |
| DE8484114586T DE3481288D1 (en) | 1983-12-01 | 1984-11-30 | METHOD AND DEVICE FOR DRAINING SLUDGE. |
| US07/003,225 US4986910A (en) | 1984-06-11 | 1987-01-14 | Apparatus for dehydrating sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59119522A JPS60261695A (en) | 1984-06-11 | 1984-06-11 | Sludge dehydrator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60261695A JPS60261695A (en) | 1985-12-24 |
| JPH0380600B2 true JPH0380600B2 (en) | 1991-12-25 |
Family
ID=14763356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59119522A Granted JPS60261695A (en) | 1983-12-01 | 1984-06-11 | Sludge dehydrator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60261695A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5318869A (en) * | 1976-08-05 | 1978-02-21 | Baehr Albert | Extractor for sludge or the like |
| JPS5949494B2 (en) * | 1978-05-15 | 1984-12-03 | 株式会社東芝 | Steam heating cooker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5949494U (en) * | 1982-09-21 | 1984-04-02 | 市川毛織株式会社 | Sludge concentration and dehydration equipment |
-
1984
- 1984-06-11 JP JP59119522A patent/JPS60261695A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5318869A (en) * | 1976-08-05 | 1978-02-21 | Baehr Albert | Extractor for sludge or the like |
| JPS5949494B2 (en) * | 1978-05-15 | 1984-12-03 | 株式会社東芝 | Steam heating cooker |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60261695A (en) | 1985-12-24 |
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