JPH0487607A - Dehydrator for sludge - Google Patents
Dehydrator for sludgeInfo
- Publication number
- JPH0487607A JPH0487607A JP2202903A JP20290390A JPH0487607A JP H0487607 A JPH0487607 A JP H0487607A JP 2202903 A JP2202903 A JP 2202903A JP 20290390 A JP20290390 A JP 20290390A JP H0487607 A JPH0487607 A JP H0487607A
- Authority
- JP
- Japan
- Prior art keywords
- filter cloth
- endless
- water tank
- tank
- sludge
- 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.)
- Granted
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 47
- 239000004744 fabric Substances 0.000 claims abstract description 117
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000002002 slurry Substances 0.000 claims abstract description 19
- 238000003756 stirring Methods 0.000 claims description 37
- 238000007790 scraping Methods 0.000 abstract description 7
- 238000000151 deposition Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 13
- 239000007921 spray Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
この発明は、下水等の汚水中から分離したスラリー状の
汚泥の脱水装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dewatering device for slurry-like sludge separated from wastewater such as sewage.
［従来の技＄４１ｒ］
下水等の汚水の処理に当り、沈殿池内に沈殿したスラリ
ー状の汚泥は、凝集剤を添加して凝集させた後、これを
脱水装置において脱水し、脱水されたケーキ状汚泥を焼
却することにより処理される。[Conventional technique $41r] When treating wastewater such as sewage, slurry-like sludge that settles in a settling tank is flocculated by adding a flocculant, and then dehydrated in a dewatering device to form a dehydrated cake. It is treated by incinerating the sludge.
第４図は、従来の脱水装置の一例を示す概略垂直断面図
である。第４図において、１は、スラリー状汚泥を凝集
しそして濃縮するための、円筒状の竪型撹拌槽である。FIG. 4 is a schematic vertical sectional view showing an example of a conventional dewatering device. In FIG. 4, 1 is a cylindrical vertical stirring tank for flocculating and concentrating slurry sludge.
撹拌槽ｌの下部にはスラリー状汚泥の供給口２が、そし
て、その上部には排出口３が設けられている。撹拌槽１
内には、その軸線に沿って、モータ４により回転する回
転軸４ａが設けられており、回転軸４ａの下端には、撹
拌翼５が取付けられている。A slurry sludge supply port 2 is provided at the bottom of the stirring tank 1, and a discharge port 3 is provided at the top. Stirring tank 1
A rotating shaft 4a rotated by a motor 4 is provided along its axis inside the rotating shaft 4a, and a stirring blade 5 is attached to the lower end of the rotating shaft 4a.
撹拌槽１に近接して、無端移動濾布式脱水機６が設けら
れている。無端移動濾布式脱水機６は、撹拌槽１にその
一方の側壁７ａが近接して配置された水槽７と、水槽７
の一方の側壁７ａの底部に一端８８が近接し、水槽７の
他方の側壁７ｂより外側の上方に他端８ｂが位置する、
一端８ａから他端８ｂに向けて上方に傾斜し、一端８ａ
側が水槽７内の下部に、他端８ｂ側が水槽７の外部上方
に位置する無端移動濾布８とからなっている。撹拌槽１
の上部に設けられた排出口３には、水槽７の側壁７８を
貫通し、その下端が濾布８の一端８ａ側に近接する供給
管１０が接続されている。An endless moving filter cloth type dehydrator 6 is provided adjacent to the stirring tank 1. The endless movable filter cloth type dehydrator 6 includes a water tank 7 whose one side wall 7a is disposed close to the stirring tank 1, and a water tank 7.
One end 88 is close to the bottom of one side wall 7a of the water tank 7, and the other end 8b is located above and outside of the other side wall 7b of the water tank 7.
Slanting upward from one end 8a to the other end 8b, one end 8a
It consists of an endless movable filter cloth 8, with one end 8b located at the lower part of the water tank 7 and the other end 8b located above the outside of the water tank 7. Stirring tank 1
A supply pipe 10 that penetrates the side wall 78 of the water tank 7 and whose lower end is close to one end 8a of the filter cloth 8 is connected to the discharge port 3 provided at the upper part of the filter cloth 8 .
水槽７の他方の側壁７ｂには、炉液の排出管１１が接続
されている。１２．１２’は、濾布８が掛は回されてい
る１対のプーリ、１３は、濾布８のリターン側に設けら
れた、濾布８の洗浄用スプレー、１４は、濾布８の他端
８ｂ側に設けられたスクレーパである。A furnace liquid discharge pipe 11 is connected to the other side wall 7b of the water tank 7. 12.12' is a pair of pulleys on which the filter cloth 8 is wound; 13 is a spray for cleaning the filter cloth 8 provided on the return side of the filter cloth 8; 14 is a spray for cleaning the filter cloth 8; This is a scraper provided on the other end 8b side.
沈殿池から抜き出したスラリー状汚泥１５に、凝集Ｍ１
６を添加する。凝集剤１６の添加されたスラリー状汚泥
１５を、供給口２を通して竪型撹拌槽１内に連続的に供
給する。撹拌槽ｌ内の撹拌翼５を、モータ４により回転
させる。撹拌槽１内に供給されたスラリー状汚泥１５は
、撹拌翼５によって撹拌されながら撹拌槽１内を上昇し
、その間に凝集して塊状の凝集体（フロック）１５′と
なり、上部の排出口３から、供給管１０を介して、水槽
７内における無端移動濾布８の一端８ａ上に連続的に供
給される。Agglomerated M1 is added to the slurry sludge 15 extracted from the settling tank.
Add 6. Slurry sludge 15 to which a flocculant 16 has been added is continuously supplied into the vertical stirring tank 1 through the supply port 2. The stirring blade 5 in the stirring tank 1 is rotated by the motor 4. The slurry-like sludge 15 supplied into the stirring tank 1 rises inside the stirring tank 1 while being stirred by the stirring blades 5, and during this time it aggregates to form lump-like aggregates (flocs) 15', which are discharged from the upper discharge port 3. From there, it is continuously supplied onto one end 8a of the endless moving filter cloth 8 in the water tank 7 via the supply pipe 10.
このようにして、無端移動濾布８の一端８ａ上に連続的
に供給された汚泥の塊状凝集体１５′は、濾布８の移動
によってその他端８ｂに至り、 この間に脱水されてケ
ーキ状となる。このケーキ状汚泥は、スクレーパ１４で
掻きとられ、濾布８の他端８ｂから排出される。In this way, the lumpy aggregates 15' of sludge continuously supplied onto one end 8a of the endless moving filter cloth 8 reach the other end 8b by the movement of the filter cloth 8, during which time they are dehydrated and turned into a cake-like mass. Become. This cake-like sludge is scraped off by the scraper 14 and discharged from the other end 8b of the filter cloth 8.
第５図は、従来の脱水装置の他の例を示す概略垂直断面
図である。第５図において、２１は、水平に設置された
無端移動濾布式脱水機であって、無端移動濾布式脱水′
ｌ！に２１は、プーリ２２゜２２′によって無端移動す
る濾布２３と、濾布２３の上部側下方に、その長さおよ
び幅方向にわたって設けられた炉液受け２４とからなっ
ている。FIG. 5 is a schematic vertical sectional view showing another example of a conventional dewatering device. In FIG. 5, reference numeral 21 denotes a horizontally installed endless moving filter cloth type dehydrator;
l! 21 consists of a filter cloth 23 that is moved endlessly by pulleys 22 and 22', and a furnace liquid receiver 24 that is provided below the upper side of the filter cloth 23 over its length and width.
２５は炉液受け２４に設けられた炉液排出口、２６は濾
布２３のリターン側に設けられた、濾布２３の洗浄用ス
プレー ２７は濾布２３の上流側端部上方に設けられた
凝集汚泥の供給機構である。25 is a furnace liquid discharge port provided in the furnace liquid receiver 24; 26 is a spray for cleaning the filter cloth 23 provided on the return side of the filter cloth 23; and 27 is provided above the upstream end of the filter cloth 23. This is the flocculated sludge supply mechanism.
前述したように、撹拌槽によって凝集された汚泥の凝集
体（フロック）１５′は、上澄水と共に供給機構２７よ
り無端移動濾布式脱水機２１の濾布２３の一端２３ａ上
に連続的に供給される。このようにして、 濾布２３の
一端２３ａ上に供給された汚泥の凝集体１５′は、濾布
２３の移動によってその他端２３ｂに至り、 この間に
脱水されてケーキ状となり、他端２３ｂから排出される
９［発明が解決しようとする課題］
上述した第４図に示す水槽７内に傾斜して設置された無
端移動濾布８を有する従来の無端移動濾布式脱水機６に
は、次のような問題がある。即ち、無端移動濾布８の傾
斜角度（仰角）αは、最大１０〜１５度位までであって
、これ以上傾斜角度を大きくすると、無端移動か布８上
に供給された汚泥の凝集体１５′が滑り落ちる。このよ
うに、脱水機６の濾布８の傾斜角度に限度があるため、
脱水機６の機長が長くなり、設備面積が大になる結果、
建設費が高騰する。As mentioned above, the flocs 15' of sludge flocculated by the stirring tank are continuously supplied together with supernatant water from the supply mechanism 27 onto one end 23a of the filter cloth 23 of the endless moving filter cloth dehydrator 21. be done. In this way, the sludge aggregates 15' supplied onto one end 23a of the filter cloth 23 reach the other end 23b by movement of the filter cloth 23, during which time they are dehydrated to form a cake, and are discharged from the other end 23b. 9 [Problems to be Solved by the Invention] The conventional endless moving filter cloth type dehydrator 6 having the endless moving filter cloth 8 installed obliquely in the water tank 7 shown in FIG. 4 described above has the following problems. There are problems like this. That is, the inclination angle (elevation angle) α of the endless moving filter cloth 8 is up to about 10 to 15 degrees at most, and if the inclination angle is increased beyond this, the sludge aggregates 15 supplied onto the endless moving filter cloth 8 ’ slides down. In this way, since there is a limit to the inclination angle of the filter cloth 8 of the dehydrator 6,
As a result of the length of the dehydrator 6 becoming longer and the equipment area becoming larger,
Construction costs will rise.
上述した無端移動濾布８の傾斜角度αを大きくするため
には、濾布８の上面の幅方向に、凝集体１５′の滑り止
め用の仕切り板等を所定間隔をあけて設けるか、または
、濾布８の代りに、水槽７内の凝集体１５′を、スクリ
ュー等で掻き上げるようにすればよいが、前者の場合に
は、凝集体１５′が仕切り板等に付着してその剥離が困
難になり、後者の場合には、凝集体１５’が破壊して、
濾布８上での濾過効率が低下する。In order to increase the inclination angle α of the endless movable filter cloth 8 described above, partition plates or the like for preventing the aggregates 15' from slipping may be provided at predetermined intervals in the width direction of the upper surface of the filter cloth 8, or In place of the filter cloth 8, the aggregates 15' in the water tank 7 may be scraped up with a screw or the like, but in the former case, the aggregates 15' may adhere to the partition plate or the like and be removed. becomes difficult, and in the latter case, the aggregate 15' is destroyed,
The filtration efficiency on the filter cloth 8 decreases.
更に、無端移動濾布８上に多量の汚泥の凝集体１５′が
供給され、濾布８上における凝集体１５′の厚さが厚く
なると、濾布８上の凝集体１５′に上滑り現象が生じて
、凝集体１５′が掻き上げられず、その一部が濾布８上
に滞留する問題が生ずる。Furthermore, when a large amount of sludge aggregates 15' are supplied onto the endless moving filter cloth 8 and the thickness of the aggregates 15' on the filter cloth 8 becomes thick, the aggregates 15' on the filter cloth 8 experience a slipping phenomenon. As a result, a problem arises in that the aggregates 15' are not scraped up and a portion of them remains on the filter cloth 8.
一方、上述した第５図に示す水平に設置された無端移動
濾布式脱水機２１には、次のような問題がある。即ち、
汚泥の凝集体１５′を、無端移動濾布式脱水機２１の濾
布２３上に供給する際、凝集体１５′は、供給機構２７
から濾布２３上に落下する。この落下時の衝撃によって
、凝集体１５′が破壊する結果、濾布２３上での濾過効
率、および、その後の圧搾脱水の際の脱水効率が低下し
、ケーキ状汚泥の含水率が高くなる。凝集体１５′の落
下時の破壊を防止するために、スラリー状汚泥に対する
凝集剤の添加量を高めるとランニングコストが高騰する
。また、凝集体１５′を。On the other hand, the horizontally installed endless moving filter cloth type dehydrator 21 shown in FIG. 5 described above has the following problems. That is,
When the sludge aggregates 15' are fed onto the filter cloth 23 of the endless moving filter cloth type dehydrator 21, the aggregates 15' are fed to the feed mechanism 27.
and falls onto the filter cloth 23. As a result of the impact of falling, the aggregates 15' are destroyed, resulting in a decrease in the filtration efficiency on the filter cloth 23 and the dewatering efficiency during the subsequent press dewatering, and the water content of the cake-like sludge increases. If the amount of flocculant added to the slurry sludge is increased in order to prevent the aggregates 15' from being destroyed when they fall, running costs will increase. Also, the aggregate 15'.
濾布２３の幅方向に均一に供給するために供給機構２７
が必要であり、このために設備費が高騰する。A supply mechanism 27 is provided to uniformly supply the filter cloth 23 in the width direction.
is required, which increases equipment costs.
従って、この発明の目的は、水処理系から排出されたス
ラリー状汚泥を、経済的に且つ高い効率で、その量が多
くても適確に脱水することができる汚泥の脱水装置を提
供することにある。Therefore, an object of the present invention is to provide a sludge dewatering device that can economically and efficiently dewater slurry sludge discharged from a water treatment system, even if the amount is large. It is in.
［課題を解決するための手段］
この発明は、スラリー状汚泥を収容し、前記スラリー状
汚泥に凝集剤を添加して凝集体とするための撹拌槽と、
前記撹拌槽に近接して設けられた、水槽と、前記水槽内
に配置された、その一端から他端に向けて上方に傾斜し
、前記他端側が前記水槽の外部上方に位置する無端移動
濾布とを有する、前記無端移動濾布上に前記撹拌槽から
供給された前記凝集体を脱水するための無端移動濾布式
脱水機とからなる汚泥の脱水装置において、前記水槽の
前記攪拌槽側の側壁に近接する端部側壁と、前記無端移
動濾布の前記水槽の水面から露出する部分までの両側を
囲む側壁とからなる内枠を、前記無端移動濾布の前記水
槽内に位置する部分を囲むように、その下端を前記無端
移動濾布の表面に接触させて前記水槽内に設け、且つ、
前記水槽内の前記無端移動濾布上の前記凝集体を挾むよ
うに、その幅方向に多数のフィンを有する、前記無端移
動濾布と同一方向に移動する無端移動掻き上げ体を、前
記無端移動濾布の上方にこれと平行に設け、そして、前
記撹拌槽の上部に取り付けられた、凝集体の供給管の開
口端を、前記内枠内に位置させたことに特徴を有するも
のである。[Means for Solving the Problems] The present invention provides a stirring tank for storing slurry sludge and adding a flocculant to the slurry sludge to form an aggregate;
a water tank provided close to the stirring tank; and an endless moving filter arranged in the water tank that slopes upward from one end to the other end, with the other end located above the outside of the water tank. and an endless moving filter type dehydrator for dewatering the aggregates supplied from the stirring tank onto the endless moving filter cloth, the sludge dewatering device comprising: a cloth, the stirring tank side of the water tank; and a side wall surrounding both sides of the endless movable filter cloth up to a portion exposed from the water surface of the water tank. provided in the water tank so as to surround the endless moving filter cloth, with its lower end in contact with the surface of the endless moving filter cloth, and
An endless movable scraping body that moves in the same direction as the endless movable filter cloth and has a large number of fins in the width direction so as to sandwich the aggregates on the endless movable filter cloth in the water tank is installed on the endless movable filter. The apparatus is characterized in that the open end of the aggregate supply pipe, which is provided above and parallel to the cloth and attached to the upper part of the stirring tank, is located within the inner frame.
次に、この発明を、図面を参照しながら説明する。第１
図はこの発明の装置の一実施態様を示す概略垂直断面図
、第２図は第１図における無端移動掻き上げ体を除いた
概略平面図である。この発明は、第４図に示した従来の
脱水装置の改良である。従って、第４図に示した脱水装
置と同一部分は同一符号を付し、その説明は省略する。Next, the present invention will be explained with reference to the drawings. 1st
The figure is a schematic vertical sectional view showing one embodiment of the apparatus of the present invention, and FIG. 2 is a schematic plan view of FIG. 1 with the endless movable scraper removed. This invention is an improvement on the conventional dewatering device shown in FIG. Therefore, the same parts as those of the dewatering apparatus shown in FIG. 4 are designated by the same reference numerals, and the explanation thereof will be omitted.
この発明の装置においては、撹拌槽１に近接して設けら
れた水槽７内に配置されている、無端移動濾布式脱水機
６の無端移動濾布８の、水槽７内に位置する部分を囲む
ように、水槽７内に内枠９が配設されている。In the apparatus of this invention, the portion of the endless moving filter cloth 8 of the endless moving filter cloth type dehydrator 6, which is disposed in the water tank 7 provided close to the stirring tank 1, is An inner frame 9 is disposed within the water tank 7 so as to surround it.
内枠９は、水槽７の、撹拌槽１側の側壁７ａに近接する
、濾布８よりも小さい幅で水槽７とほぼ同じ高さの端部
側壁９ａと、ン戸布８の水槽７の水面から露出する部分
までの両側を囲む、水槽７とほぼ同じ高さの左右の側壁
９ｂ、９ｃとからなる平面コ字状であり、その下端は、
濾布８の表面上に接触している。The inner frame 9 includes an end side wall 9a of the water tank 7 that is close to the side wall 7a on the stirring tank 1 side and has a width smaller than the filter cloth 8 and approximately the same height as the water tank 7; It has a U-shaped planar shape consisting of left and right side walls 9b and 9c of approximately the same height as the aquarium 7, surrounding both sides from the water surface to the exposed part, and the lower end thereof is
It is in contact with the surface of the filter cloth 8.
撹拌槽１の上部の排出口３に取付けられている供給ｐ７
Ｈｏは、水槽７の側壁７ａおよび内枠９の端部側壁９ａ
を貫通し、 その開口端を内枠９内の濾布８の一端８ａ
に近接させて配置されている。Supply p7 attached to the upper discharge port 3 of the stirring tank 1
Ho is the side wall 7a of the water tank 7 and the end side wall 9a of the inner frame 9.
and connect its open end to one end 8a of the filter cloth 8 inside the inner frame 9.
is placed close to.
水槽７内に配置されている無端移動濾布式脱水機６の無
端移動濾布８の傾斜角度（仰角）αは、２０〜４０度が
適当である。The inclination angle (elevation angle) α of the endless movable filter cloth 8 of the endless movable filter cloth type dehydrator 6 disposed in the water tank 7 is suitably 20 to 40 degrees.
水槽７内には、無端移動濾布８上に供給管１０を通して
撹拌槽１から供給された、汚泥の凝集体（フロック）１
５′を挾むように、無端移動掻き上げ体１７が設けられ
ている。In the water tank 7, sludge aggregates (flocs) 1 are supplied from the stirring tank 1 through the supply pipe 10 onto the endless moving filter cloth 8.
An endless movable raking body 17 is provided so as to sandwich 5'.
無端移動掻き上げ体１７は、１対のプーリ１８゜１８′
に掛は回され、一方のプーリ１８に取り付けられたモー
タによって無端移動する、内枠９とほぼ同じ幅のチェー
ンベルト１９と、チェーンベルト１９の長さ方向に所定
間隔をあけてその幅方向に設けられた多数のフィン２０
とからなっている。The endless movable scraping body 17 includes a pair of pulleys 18°18'.
A chain belt 19 with approximately the same width as the inner frame 9 is moved endlessly by a motor attached to one pulley 18. A large number of fins 20 provided
It consists of
このような無端移動掻き上げ体１７は、無端移動濾布８
の上方に所定間隔をあけ、濾布８と平行に配置され、濾
布８の移動方向と同一方向に、濾布８の移動速度とほぼ
同一かまたはこれよりもやや早い速度で移動する。Such an endless movable scraping body 17 is an endless movable filter cloth 8.
It is arranged parallel to the filter cloth 8 at a predetermined interval above the filter cloth 8, and moves in the same direction as the moving direction of the filter cloth 8 at a speed that is approximately the same as or slightly faster than the moving speed of the filter cloth 8.
［作用コ 次に、この発明の装置の作用について説明する。[Action Co. Next, the operation of the device of this invention will be explained.
沈殿池から抜き出したスラリー状汚泥１５に凝集剤１６
を添加し、凝集剤１６の添加されたスラリー状汚泥１５
を、供給口２を通して撹拌槽１内に連続的に供給する。A flocculant 16 is added to the slurry sludge 15 extracted from the settling tank.
Slurry sludge 15 to which flocculant 16 was added
is continuously supplied into the stirring tank 1 through the supply port 2.
撹拌槽１内に供給されたスラリー状汚泥１５は、撹拌翼
５によって撹拌されながら撹拌槽１内を上昇し、この間
に凝集して塊状の凝集体（フロック）１５′となる。凝
集体１５′は、上澄水と共に、供給管１０を通って、水
槽７の内枠９内における無端移動濾布式脱水機６の無端
移動濾布８の一端８ａ上の、無端移動掻き上げ体１７と
の間に供給される。The slurry-like sludge 15 supplied into the stirring tank 1 rises in the stirring tank 1 while being stirred by the stirring blades 5, and during this time it coagulates to form lump-like aggregates (flocs) 15'. The aggregate 15' is passed through the supply pipe 10 together with the supernatant water to the endless movable scraper on one end 8a of the endless movable filter cloth 8 of the endless movable filter cloth type dehydrator 6 in the inner frame 9 of the water tank 7. 17.
上述した凝集体１５′の濾布８上への供給は、撹拌槽１
と水槽７とのわずかな液面差により行なわれるので、濾
布８上に落下する凝集体１５′に、速い流速や渦による
撹乱、および、落下による衝撃が生ずることは殆んどな
い。従って、凝集体１５′は破壊することなく、濾布８
上に、あたかも雪が積もる如く静かに沈降し、第３図に
示すように、水分の透過性が良好な状態で堆積する。The above-mentioned aggregate 15' is supplied onto the filter cloth 8 through the stirring tank 1.
Since this is carried out by a slight difference in liquid level between the filter cloth 8 and the water tank 7, the aggregates 15' falling onto the filter cloth 8 are hardly disturbed by high flow velocity or eddies, and are hardly subjected to impact due to falling. Therefore, the aggregate 15' is not destroyed and the filter cloth 8
It settles quietly on top, just like snow, and is deposited in a state with good moisture permeability, as shown in Figure 3.
このように、濾布８上に堆積した凝集体１５′は、濾布
８および無端移動掻き上げ体１７の移動に従って、水槽
７内から掻き上げられる。このとき、濾布８の、水槽７
内に位置する部分は、内枠９によって囲まれているので
、濾布８上の凝集体１５′は、微小な差圧力で、濾布８
の表面上に押し付けられる。従って、無端移動濾布８の
傾斜角度αを、従来よりも大きい２０〜４０度となして
も、凝集体１５′が濾布８から滑り落ちることはない。In this way, the aggregates 15' deposited on the filter cloth 8 are scraped up from within the water tank 7 as the filter cloth 8 and the endless movable scraper 17 move. At this time, the filter cloth 8, the water tank 7
Since the portion located inside is surrounded by the inner frame 9, the aggregates 15' on the filter cloth 8 are moved against the filter cloth 8 by a small differential pressure.
pressed onto the surface of the Therefore, even if the inclination angle α of the endless movable filter cloth 8 is set to 20 to 40 degrees, which is larger than the conventional one, the aggregates 15' will not slip off the filter cloth 8.
そして、濾布８の移動に従って、濾布８上の凝集体１５
′が水槽７から掻き上げられる間に、水槽７内において
、凝集体１５′の各粒子の間隙から、炉液が濾布８を通
してその下方に速やかに排出される。この結果、凝集体
１５′は濃縮され、次いで、濾布８を通して重力により
効果的に脱水される。Then, as the filter cloth 8 moves, the aggregates 15 on the filter cloth 8
While the aggregate 15' is being scraped up from the water tank 7, the furnace liquid is quickly discharged from the gaps between the particles of the aggregate 15' in the water tank 7 through the filter cloth 8 and downward. As a result, the aggregates 15' are concentrated and then effectively dewatered by gravity through the filter cloth 8.
更に、濾布８上に多量の凝集体１５′が供給され、濾布
８上における凝集体１５′の厚さが厚くなっても、凝集
体１５′は、無端移動掻き上げ体１７のフィン２０によ
って、その上方から挾み込まれながら、濾布８および無
端移動掻き上げ体１７と共に移動する。従って、濾布８
上の凝集体１５′に上滑りによる滞留が生ずることはな
く、適確に掻き上げられる。Furthermore, even if a large amount of the aggregates 15' are supplied onto the filter cloth 8 and the thickness of the aggregates 15' on the filter cloth 8 becomes thick, the aggregates 15' will not reach the fins 20 of the endless movable scraper 17. It moves together with the filter cloth 8 and the endless movable scraper 17 while being sandwiched from above. Therefore, the filter cloth 8
No accumulation occurs in the upper aggregate 15' due to upward sliding, and the aggregate is properly scraped up.
次に、この発明を、実施例により説明する。Next, the present invention will be explained with reference to examples.
［実施例コ
沈殿池から抜き出した、濃度が１，５００〜１０ 、Ｏ
ＯＯｐｐ＋ｎのスラリー状汚泥に対し、強力力チオン系
高分子凝集剤を、スラリー状汚泥中の固形物重量比で０
．５％添加した上、撹拌槽１内に供給した。撹拌槽１内
において凝集された塊状の凝集体１５′を、上澄水と共
、に、供給管１０を通って、水槽７の内枠９内における
無端移動か布式脱水機６の、０．２〜０ 、６ ｍ７分
の速度で移動するが布８上に供給し、濾布８と、上記と
ほぼ同じ速度で移動する無端移動掻き上げ体１７との間
で挾みながら移動させ、その間に脱水した。なお、濾布
８は、そのリターン側に設けられたスプレー８により、
０ 、５ ｒｎ” ／ Ｈ（２ｋｇ ／ ｃｘｌ ）
の水量で５〜６時間毎に、約１０分間洗浄した。[Example Co. Extracted from the sedimentation tank, concentration 1,500-10, O
For slurry-like sludge of OOpp+n, a strong thionic polymer flocculant was added to the slurry-like sludge at a solid weight ratio of 0.
．． After adding 5%, the mixture was supplied into the stirring tank 1. The lump-like aggregates 15' coagulated in the stirring tank 1 are passed through the supply pipe 10 together with the supernatant water, and are moved endlessly within the inner frame 9 of the water tank 7 or transferred to the cloth type dehydrator 6. 2 to 0, 6 meters, moving at a speed of 7 minutes, is fed onto the cloth 8, and moved while being sandwiched between the filter cloth 8 and the endless movable scraper 17, which moves at almost the same speed as above. was dehydrated. In addition, the filter cloth 8 has a spray 8 provided on its return side.
0,5rn”/H (2kg/cxl)
of water for about 10 minutes every 5 to 6 hours.
このようにして、濾布８上において脱水され、濾布８の
他端８ｂから排出されたケーキ状汚泥は、約５ｍ＋の厚
さで、９０〜９５％の含水率であった。The cake-like sludge thus dehydrated on the filter cloth 8 and discharged from the other end 8b of the filter cloth 8 had a thickness of about 5 m+ and a water content of 90 to 95%.
そして、脱水機６からの炉液は、水槽７の他方の側壁７
ｂに取り付けられた排出管１１を通して排出された。な
お、炉液の５Ｓ（ｆ液１ａ中の固形物の量）は数ｐｐｍ
であり、 その回収率は９９％以上であった。Then, the furnace liquid from the dehydrator 6 is transferred to the other side wall 7 of the water tank 7.
It was discharged through the discharge pipe 11 attached to b. In addition, 5S of the furnace liquid (amount of solids in f liquid 1a) is several ppm.
The recovery rate was over 99%.
［発明の効果］
以上述べたように、この発明によれば、次のような優れ
た効果がもたらされる。[Effects of the Invention] As described above, the present invention provides the following excellent effects.
（１）固液分離性に優れており、脱水装置から排出され
た汚泥の濃度は、原スラリー状汚泥の濃度に比較して、
１０〜３０倍である。(1) It has excellent solid-liquid separation properties, and the concentration of sludge discharged from the dewatering equipment is lower than that of the original slurry sludge.
It is 10 to 30 times.
（２）脱水機の傾斜角度（仰角）を２０〜４０度にする
ことができるので、第４図に示した従来の装置に比べ設
備面積を小にすることができ、建設費が安価になる。(2) Since the inclination angle (elevation angle) of the dehydrator can be set to 20 to 40 degrees, the equipment area can be reduced compared to the conventional equipment shown in Figure 4, resulting in lower construction costs. .
（３）第５図に示した従来の装置のように、汚泥の凝集
体が濾布上に供給されるときに、凝集体が破壊すること
はない。従って、濾布上での脱水効率が高く、含水率が
９０〜９５％のケーキ状汚泥を安定して得ることができ
る。また、走行濾布から排出されるケーキを従来の圧搾
脱水機で更に脱水することが容易である。更に、スラリ
ー状汚泥に対する凝集剤の添加率を従来の０．７〜１．
０％から、０．３〜０．５％に減少させることができ、
従って、ランニングコストが低減される。(3) Unlike the conventional apparatus shown in FIG. 5, when the sludge aggregates are fed onto the filter cloth, the aggregates are not destroyed. Therefore, the dewatering efficiency on the filter cloth is high, and cake-like sludge with a water content of 90 to 95% can be stably obtained. Further, it is easy to further dewater the cake discharged from the running filter cloth using a conventional press dehydrator. Furthermore, the addition rate of flocculant to slurry sludge was increased from 0.7 to 1.
It can be reduced from 0% to 0.3-0.5%,
Therefore, running costs are reduced.
（４）従来の装置では、 ５０００ｐｐｍ以下の希薄な
濃度のスラリー状汚泥の脱水は困難であったが、この発
明によれば、 ＩＱＯＯｐｐｍ以下の希薄な濃度のスラ
リー状汚泥の脱水も容易に行なうことができる。(4) With conventional equipment, it was difficult to dewater slurry sludge with a dilute concentration of 5000 ppm or less, but according to the present invention, it is possible to easily dewater slurry sludge with a dilute concentration of IQOO ppm or less. I can do it.
（５）第５図に示した従来の装置のように、特別な汚泥
供給機構は不要であるから、設備費を低減することがで
きる。(5) Unlike the conventional device shown in FIG. 5, a special sludge supply mechanism is not required, so equipment costs can be reduced.
（６）炉液のＳＳ（炉液ＩＱ中の固形物の量）は低く且
つその回収率は９９％以上である。(6) The SS of the furnace liquid (the amount of solids in the furnace liquid IQ) is low and the recovery rate is 99% or more.
（７）濾布上への汚泥の凝四体の供給量が多くても。(7) Even if the amount of sludge aggregates supplied onto the filter cloth is large.
凝集体が上滑りして濾布上に滞留することはなく、適確
に掻き上げが行なわれる。The aggregates do not slide up and stay on the filter cloth, and are properly scraped up.
第１図はこの発明の装置の一実施態様を示す概略垂直断
面図、第２図は第１図における無端移動掻き上げ体を除
いた概略平面図、第３図はこの発明の装置による濾布上
の汚泥の堆積状態を示す説明図、第４図は従来の装置の
一例を示す概略垂直断面図、第５図は従来の装置の他の
例を示す概略垂直断面図である。図面において、
１・・・撹拌槽、 ２・・・供給口、３・・・排出
口、 ４・・・モータ、５・・・撹拌翼、 ６
・・・無端移動濾布式脱水機、７・・・水槽、
８・・・濾布、９・・・内枠、 １０・・・供給管
、１１・・・排出管、 １２・・・プーリ、１３・・
・スプレー １４・・・スクレーパ、１５・・・スラ
リー状汚泥、１５′・・・凝集体、１６・・・凝集剤、
１７・・・無端移動掻き上げ体、１８・・・プーリ
、 １９・・・チェーンベルト、２０・・・フィン、
２１・・・無端移動濾布式脱水機、２２・・・プー
リ、２３・・・濾布、
２４・・・炉液受け、 ２５・・・排出口、２６・・・
スプレー ２７・・・供給機構、α・・・無端移動濾
布の傾斜角度。FIG. 1 is a schematic vertical sectional view showing an embodiment of the device of the present invention, FIG. 2 is a schematic plan view of FIG. 1 with the endless movable scraper removed, and FIG. FIG. 4 is a schematic vertical sectional view showing an example of a conventional device, and FIG. 5 is a schematic vertical sectional view showing another example of the conventional device. In the drawings, 1... Stirring tank, 2... Supply port, 3... Discharge port, 4... Motor, 5... Stirring blade, 6
... Endless moving filter cloth dehydrator, 7... Water tank,
8... Filter cloth, 9... Inner frame, 10... Supply pipe, 11... Discharge pipe, 12... Pulley, 13...
・Spray 14... Scraper, 15... Slurry sludge, 15'... Aggregate, 16... Flocculant,
17... Endless movable scraping body, 18... Pulley, 19... Chain belt, 20... Fin,
21... Endless moving filter cloth type dehydrator, 22... Pulley, 23... Filter cloth, 24... Furnace liquid receiver, 25... Discharge port, 26...
Spray 27... Supply mechanism, α... Inclination angle of endless moving filter cloth.
Claims (1)
凝集剤を添加して凝集体とするための撹拌槽と、前記撹
拌槽に近接して設けられた、水槽と、前記水槽内に配置
された、その一端から他端に向けて上方に傾斜し、前記
他端側が前記水槽の外部上方に位置する無端移動濾布と
を有する、前記無端移動濾布上に前記撹拌槽から供給さ
れた前記凝集体を脱水するための無端移動濾布式脱水機
とからなる汚泥の脱水装置において、 前記水槽の前記攪拌槽側の側壁に近接する端部側壁と、
前記無端移動濾布の前記水槽の水面から露出する部分ま
での両側を囲む側壁とからなる内枠を、前記無端移動濾
布の前記水槽内に位置する部分を囲むように、その下端
を前記無端移動濾布の表面に接触させて前記水槽内に設
け、且つ、前記水槽内の前記無端移動濾布上の前記凝集
体を挾むように、その幅方向に多数のフィンを有する、
前記無端移動濾布と同一方向に移動する無端移動掻き上
げ体を、前記無端移動濾布の上方にこれと平行に設け、
そして、前記撹拌槽の上部に取り付けられた、凝集体の
供給管の開口端を、前記内枠内に位置させたことを特徴
とする、汚泥の脱水装置。(1) A stirring tank for accommodating slurry sludge and adding a flocculant to the slurry sludge to form an aggregate; a water tank provided in close proximity to the stirring tank; and a water tank disposed within the water tank. and an endless moving filter cloth that is inclined upward from one end to the other end, and the other end is located above the outside of the water tank, and the filter is supplied from the stirring tank onto the endless moving filter cloth. A sludge dewatering device comprising an endless moving filter type dehydrator for dewatering the aggregates, comprising: an end side wall close to the side wall on the stirring tank side of the water tank;
and side walls surrounding both sides of the endless movable filter cloth up to the portion exposed from the water surface of the water tank, and the lower end of the endless movable filter cloth is connected to the endless provided in the water tank in contact with the surface of the moving filter cloth, and having a large number of fins in the width direction thereof so as to sandwich the aggregate on the endless moving filter cloth in the water tank;
An endless movable scraper that moves in the same direction as the endless movable filter cloth is provided above and parallel to the endless movable filter cloth,
The sludge dewatering device is characterized in that the open end of the aggregate supply pipe attached to the upper part of the stirring tank is located within the inner frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2202903A JPH0817895B2 (en) | 1990-07-31 | 1990-07-31 | Sludge dewatering equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2202903A JPH0817895B2 (en) | 1990-07-31 | 1990-07-31 | Sludge dewatering equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0487607A true JPH0487607A (en) | 1992-03-19 |
| JPH0817895B2 JPH0817895B2 (en) | 1996-02-28 |
Family
ID=16465103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2202903A Expired - Fee Related JPH0817895B2 (en) | 1990-07-31 | 1990-07-31 | Sludge dewatering equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0817895B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009178629A (en) * | 2008-01-29 | 2009-08-13 | Daiki Ataka Engineering Co Ltd | Apparatus and method for separating sludge |
| JP2015071150A (en) * | 2013-10-04 | 2015-04-16 | 富士芝機工株式会社 | Solid-liquid separation device |
-
1990
- 1990-07-31 JP JP2202903A patent/JPH0817895B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009178629A (en) * | 2008-01-29 | 2009-08-13 | Daiki Ataka Engineering Co Ltd | Apparatus and method for separating sludge |
| JP4651052B2 (en) * | 2008-01-29 | 2011-03-16 | アタカ大機株式会社 | Sludge separation apparatus and sludge separation method |
| JP2015071150A (en) * | 2013-10-04 | 2015-04-16 | 富士芝機工株式会社 | Solid-liquid separation device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0817895B2 (en) | 1996-02-28 |
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