JPS6239913Y2 - - Google Patents
Info
- Publication number
- JPS6239913Y2 JPS6239913Y2 JP1983028982U JP2898283U JPS6239913Y2 JP S6239913 Y2 JPS6239913 Y2 JP S6239913Y2 JP 1983028982 U JP1983028982 U JP 1983028982U JP 2898283 U JP2898283 U JP 2898283U JP S6239913 Y2 JPS6239913 Y2 JP S6239913Y2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- screw
- screw shaft
- discharge port
- outer cylinder
- 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
Links
- 239000010802 sludge Substances 0.000 claims description 66
- 239000000463 material Substances 0.000 claims description 17
- 239000012530 fluid Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000007790 scraping Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 18
- 239000007787 solid Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000005352 clarification Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
Description
【考案の詳細な説明】
本考案は、用水・排水・その他の液体の清澄処
理の際に発生する汚泥、あるいはこれら汚泥に有
機高分子凝集剤その他の凝集剤を添加し凝集させ
た凝集汚泥を、スクリユー羽根で連続的に圧搾脱
水して液を絞り出し、著しく含水率の低い脱水
ケーキを生成することのできる、円筒型材の外
筒を有するスクリユープレス型脱水機の改良に関
するものである。[Detailed description of the invention] This invention uses sludge generated during the clarification treatment of water, wastewater, and other liquids, or flocculated sludge obtained by adding organic polymer flocculants or other flocculants to these sludges. This invention relates to an improvement of a screw press type dehydrator having an outer cylinder made of a cylindrical material, which can produce a dehydrated cake with an extremely low water content by continuously compressing and dewatering with screw blades and squeezing out the liquid.
従来のスクリユープレス型脱水機は、第１図に
示されるように汚泥ホツパ２′の汚泥供給口１′と
脱水ケーキ排出口６′の間に設けた円筒型材の
外筒３′（以下、外筒３′と略記する）と、外周に
スクリユー羽根４′を有するスクリユー軸５′とか
らなり、しかも外筒３′、スクリユー軸５′及びス
クリユー羽根４′により形成される環状間隙容積
を適宜順次縮小して、汚泥供給口１′に投入され
た汚泥をスクリユー軸５′の回転によつて軸方
向、すなわちケーキ排出口６′方向に押出しなが
ら加熱流体（たとえばスチーム）をスクリユー軸
５′に設けたスチーム吹入口９′より流入させスク
リユー軸５′内に供給して汚泥に熱を伝え、汚泥
温度を高めながら順次圧搾し、汚泥より絞り出さ
れた液を外筒３′より排出させ、脱水ケーキを
ケーキ排出口６′より取り出すようにした構造・
機能を有している。なお、７′はスクリユー軸駆
動軸、８′はスクリユー軸駆動装置、１０′はドレ
ーン吐出口である。 As shown in FIG. 1, the conventional screw press type dehydrator has a cylindrical outer tube 3' (hereinafter referred to as The annular gap formed by the outer cylinder 3', the screw shaft 5', and the screw blade 4' is made up of a screw shaft 5' having a screw blade 4' on its outer periphery. The sludge introduced into the sludge supply port 1' is gradually reduced in size and extruded in the axial direction, that is, in the direction of the cake discharge port 6' by the rotation of the screw shaft 5', while heating fluid (e.g. steam) is applied to the screw shaft 5'. The steam is introduced through the provided steam inlet 9' and supplied into the screw shaft 5' to transfer heat to the sludge, and the sludge is sequentially squeezed while increasing the sludge temperature, and the liquid squeezed out from the sludge is discharged from the outer cylinder 3'. A structure in which the dehydrated cake is taken out from the cake outlet 6'.
It has a function. In addition, 7' is a screw shaft drive shaft, 8' is a screw shaft drive device, and 10' is a drain outlet.
一般に汚泥の圧搾脱水において、材面積当り
の固形物量、すなわち固形物負荷量が小さい程脱
水は容易になる。換言すれば一定の含水率の脱水
ケーキを生成させる場合、材面積を大きくして
投入汚泥の厚さを薄くすればするほど短時間で脱
水が終了し、また圧搾時間が一定であれば生成す
る脱水ケーキの含水率がより低下するなどという
傾向にある。すなわち従来のスクリユープレスに
おいて汚泥を脱水する場合、材が外筒３′だけ
であるので、スクリユープレスに投入された汚泥
の厚さはスクリユー軸５′外面と外筒３′内面との
間隙に相当し、この間隙が大きいため一定の含水
率の脱水ケーキを得るには長時間装置内で圧搾脱
水する必要があり、このため勢い外筒３′とスク
リユー羽根４′、スクリユー軸５′を長くしたり、
あるいはスクリユー軸５′の回転速度を小さくし
て汚泥の滞留時間を長くしなければならず、従つ
て外筒３′の直径に対して長さが非常に長いも
の、あるいはスクリユー軸５′の回転速度を小さ
くしたものでは処理固形物量が少さくなるなどと
いう欠点があつた。 Generally, in press dewatering of sludge, the smaller the amount of solids per material area, that is, the smaller the amount of solids loaded, the easier the dewatering becomes. In other words, when producing a dehydrated cake with a constant moisture content, the larger the material area and the thinner the thickness of the input sludge, the faster the dewatering will be completed, and if the pressing time is constant, the more cake will be produced. There is a tendency for the moisture content of the dehydrated cake to decrease further. In other words, when dewatering sludge in a conventional screw press, the outer cylinder 3' is the only material, so the thickness of the sludge charged into the screw press is equal to the gap between the outer surface of the screw shaft 5' and the inner surface of the outer cylinder 3'. Since this gap is large, it is necessary to compress and dewater in the device for a long time in order to obtain a dehydrated cake with a constant moisture content. Make it longer or
Alternatively, it is necessary to reduce the rotation speed of the screw shaft 5' to increase the retention time of the sludge, and therefore the length is very long compared to the diameter of the outer cylinder 3', or the rotation of the screw shaft 5' A method with a lower speed had the disadvantage that the amount of solid matter treated was small.
スクリユープレス型脱水機で汚泥を圧搾脱水す
る場合、汚泥供給口１′付近では投入された汚泥
の固形物濃度が低いため、小さな圧搾圧力しか加
わらないにもかかわらず大量の液が外筒３′よ
り排出され、ケーキ排出口６′付近では高い圧搾
圧力が加わつているにもかかわらず液の排出量
は少ない傾向を示す。汚泥を加熱しながら圧搾脱
水する場合、圧擦初期から熱を加えるよりもある
程度圧搾脱水し汚泥の固形物濃度が高くなつてか
ら加えた方が少ない熱量で脱水が可能になる傾向
を示す。スクリユープレス型脱水機においても圧
搾初期から熱を加えて圧搾脱水するよりも圧搾初
期には熱を加えないで圧搾脱水し、大部分の液
を排出させた後熱を加えて圧搾脱水した方が経済
的である。ところが、第１図に示す従来のスクリ
ユープレス型脱水機はスクリユー軸５′のスチー
ム吹入口９′よりスチームを流入させ、汚泥供給
口１′より投入された汚泥をいきなり加熱しなが
ら圧搾脱水しているため、外筒３′より排出され
る液にもちさられる熱量が多く非常に不経済で
あるという欠点がある。 When compressing and dewatering sludge with a screw press type dehydrator, the solid concentration of the sludge introduced is low near the sludge supply port 1', so a large amount of liquid is pumped into the outer tube 3 even though only a small pressing pressure is applied. The amount of liquid discharged tends to be small near the cake discharge port 6' even though high squeezing pressure is applied. When compressing and dewatering sludge while heating it, it tends to be possible to dehydrate with less heat by compressing and dewatering to a certain extent and adding it after the solids concentration of the sludge has increased, rather than applying heat from the initial stage of compression. In a screw press type dehydrator, it is better to dehydrate by pressing without applying heat in the early stage of pressing, and then adding heat after draining most of the liquid, rather than applying heat from the early stage of pressing to dehydrate by pressing. is economical. However, in the conventional screw press type dehydrator shown in Fig. 1, steam is introduced from the steam inlet 9' of the screw shaft 5', and the sludge introduced from the sludge supply port 1' is compressed and dehydrated while being suddenly heated. Therefore, there is a drawback that a large amount of heat is carried by the liquid discharged from the outer cylinder 3', making it very uneconomical.
本考案は、従来のスクリユープレス型脱水機に
おける上記欠点を有効に除去し得る汚泥脱水機を
経済的に提供することを目的とするものである。 The object of the present invention is to economically provide a sludge dewatering machine that can effectively eliminate the above-mentioned drawbacks of conventional screw press type dewatering machines.
すなわち本考案は、汚泥供給口１とケーキ排出
口６とを有する円筒型材の外筒３内にスクリユ
ー羽根４を外周に有し、しかも内部を加熱流体で
加熱可能としたスクリユー軸５を回転自在に配備
すると共に前記外筒３、スクリユー軸５およびス
クリユー羽根４により形成される間隙をケーキ排
出口６側に向かつて順次縮小せしめ、前記スクリ
ユー軸５の回転で汚泥を圧搾脱水しつつ前記ケー
キ排出口６から排出するスクリユープレス型脱水
機において、前記スクリユー軸５だけを前半部５
ａと後半部５ｂに分割し、前半部５ａを固定配備
すると共にその表面の一部あるいは全面を材と
し、しかも前半部５ａ表面からスクリユー羽根４
を切りはなし、前半部５ａの材表面上に生成し
たケーキをスクリユー羽根４によつて掻き取りな
がら移送できるようにし、生成する脱水ケーキの
含水率の低下、固形物処理量の増加あるいは使用
する加熱流体量の低下などを目的として構成した
スクリユープレス型脱水機である。 That is, the present invention has screw blades 4 on the outer periphery in an outer cylinder 3 of a cylindrical shape having a sludge supply port 1 and a cake discharge port 6, and a screw shaft 5 whose inside can be heated with heating fluid is rotatable. At the same time, the gap formed by the outer cylinder 3, the screw shaft 5, and the screw blade 4 is gradually reduced toward the cake discharge port 6 side, and the cake discharge is performed while compressing and dewatering the sludge by the rotation of the screw shaft 5. In a screw press type dehydrator that discharges water from the outlet 6, only the screw shaft 5 is connected to the front half 5.
The first half 5a is fixedly arranged and a part or the entire surface thereof is made of material, and the screw blade 4 is inserted from the surface of the first half 5a.
The cake formed on the surface of the material in the first half 5a is scraped off and transferred by the screw blade 4, thereby reducing the water content of the dehydrated cake formed, increasing the amount of solids processed, or increasing the amount of heat used. This is a screw press type dehydrator designed to reduce the amount of fluid.
以下、本考案の実施例を第２図、第３図を参照
して説明する。第２図に示す脱水機は、汚泥供給
口１とケーキ排出口６とを設けた円筒型材の外
筒３（以下、外筒３と略記する）内にスクリユー
軸５が設けられているが、このスクリユー軸５
は、全面（一部でもよい）が材で液排出口１
２を有する円錘状の内筒となつている前半部５ａ
と、従来のスクリユー軸５′と類似構造の後半部
５ｂとにより構成されている。前記前半部５ａは
後半部５ｂと分割して回転不能に固定配備され、
後半部５ｂの先端部は前半部５ａの後端部と摺動
可能で、これらの摺動面は外圧に対するシール面
を構成している。スクリユー羽根４は後半部５ｂ
と一体で回転するように設けられているが、該ス
クリユー羽根４のうち前半部５ａに位置する部分
は該前半部５ａとわずかな間隔をもつて切り離さ
れている。 Hereinafter, embodiments of the present invention will be described with reference to FIGS. 2 and 3. In the dehydrator shown in FIG. 2, a screw shaft 5 is provided in an outer cylinder 3 (hereinafter abbreviated as outer cylinder 3), which is a cylindrical material and has a sludge supply port 1 and a cake discharge port 6. This screw shaft 5
, the entire surface (or part of it) is made of wood and the liquid outlet 1
The front half 5a is a conical inner cylinder having 2
It is composed of a conventional screw shaft 5' and a rear half 5b having a similar structure. The front half part 5a is divided from the rear half part 5b and fixedly arranged in a non-rotatable manner,
The tip of the rear half 5b can slide on the rear end of the front half 5a, and these sliding surfaces constitute a sealing surface against external pressure. The screw blade 4 is the rear half 5b
However, the portion of the screw blade 4 located in the front half 5a is separated from the front half 5a by a small distance.
前記後半部５ｂは、その先端部に断熱材９ａに
より被覆された（断熱材９ａは省略してもよい）
スチーム導入管９が連設され、ドレーンの導出管
を兼ねたスクリユー軸駆動軸７及びスクリユー軸
駆動装置８によつて回転自在に配備され、汚泥供
給口１付近の材面積が大になるように、しかも
加熱流体の使用量が小になるように構成してあ
る。なお、図中９ｂはスチーム吹入口、１０はド
レーン吐出口、１１ａ，１１ｂは軸受である。 The tip of the rear half portion 5b is covered with a heat insulating material 9a (the heat insulating material 9a may be omitted).
A steam inlet pipe 9 is arranged in series, and is rotatably arranged by a screw shaft drive shaft 7 which also serves as a drain outlet pipe and a screw shaft drive device 8, so that the material area near the sludge supply port 1 is increased. Moreover, it is constructed so that the amount of heating fluid used is small. In the figure, 9b is a steam inlet, 10 is a drain outlet, and 11a and 11b are bearings.
しかして汚泥供給口１のある汚泥ホツパ２に投
入された汚泥は外筒３、スクリユー羽根４および
スクリユー軸５より形成される環状間隙に流入
し、スチームにより加熱されつつ、かつスクリユ
ー軸５の回転によつてケーキ排出口６側に搬送さ
れつつ前記環状間隙の容積の縮小によつて徐々に
圧搾され、外筒３から液を排出させながら次第
にケーキ状となり脱水ケーキとしてケーキ排出口
６より排出される。 The sludge put into the sludge hopper 2 where the sludge supply port 1 is located flows into the annular gap formed by the outer cylinder 3, the screw blades 4 and the screw shaft 5, and is heated by the steam while the screw shaft 5 rotates. The cake is conveyed to the cake discharge port 6 side by the cylinder 3, and is gradually squeezed by reducing the volume of the annular gap, and gradually forms a cake while discharging the liquid from the outer cylinder 3, and is discharged from the cake discharge port 6 as a dehydrated cake. Ru.
この際、前半部５ａは一部あるいは全面が材
で構成されているため外筒３、スクリユー羽根４
および前半部５ａの環状間隙に投入された汚泥は
外筒３および前半部５ａの両面で脱水されること
により、材面に対する汚泥厚さ（見掛けの汚泥
厚さ）は従来の外筒３面だけで脱水されるスクリ
ユープレス型脱水機の1/2になる。先にも述べた
ように、汚泥の圧搾脱水において材面積当りの
固形物量、すなわち固形物負荷量が小さい程脱水
は容易になり、圧搾時間が一定であれば材面積
を大きくして投入汚泥の厚さを薄くすればするほ
ど得られる脱水ケーキの含水率が低下する傾向に
あり、本考案のスクリユープレス型脱水機の前半
部５ａにおいては従来のスクリユープレス型脱水
機に比べ汚泥厚さが1/2と薄いため前半部５ａを
汚泥が通過し、後半部５ｂに搬送されるまでには
汚泥固形物濃度がより高くなつており以後、後半
部５ｂにおいて圧搾脱水が容易になる。また、本
考案の脱水機は前半部５ａ内部に直接加熱流体が
充満されることなく、この環状間隙部分に滞留す
る汚泥の固形物濃度は低いため熱を加えなくても
低い圧搾圧力で容易に液を分離することがで
き、外筒３および前半部５ａより液を排出させ
ある程度固形物濃度が高くなつた後、後半部５ｂ
に搬送されてから熱が加わるため液により持ち
去られる熱量が少なく、従来のスクリユープレス
型脱水機より少ない熱量で脱水が完了する。 At this time, since the front half 5a is partially or entirely made of material, the outer cylinder 3 and the screw blade 4 are
The sludge introduced into the annular gap of the front half 5a is dewatered on both sides of the outer cylinder 3 and the front half 5a, so that the sludge thickness relative to the material surface (apparent sludge thickness) is only the three sides of the conventional outer cylinder. This is 1/2 of the screw press type dehydrator. As mentioned earlier, in compressing and dewatering sludge, the smaller the amount of solids per material area, that is, the smaller the solids load, the easier the dewatering becomes. The thinner the thickness, the lower the moisture content of the obtained dehydrated cake.In the front half 5a of the screw press type dehydrator of the present invention, the sludge thickness is lower than that of the conventional screw press type dehydrator. Since the sludge is as thin as 1/2, the sludge passes through the first half 5a, and the sludge solid concentration becomes higher by the time it is conveyed to the second half 5b, and thereafter, compression dewatering becomes easier in the second half 5b. In addition, in the dehydrator of the present invention, the inside of the front half 5a is not directly filled with heating fluid, and the solid concentration of the sludge that stays in this annular gap is low, so it can be easily compressed at low pressure without applying heat. After the liquid can be separated and the liquid is discharged from the outer cylinder 3 and the front half 5a and the solids concentration has increased to a certain extent, the second half 5b
Since heat is applied after the liquid is transported, less heat is carried away by the liquid, and dehydration is completed with less heat than conventional screw press dehydrators.
第３図、第４図に示す脱水機は前半部５ａ内に
可撓性のプレード１３を取り付けたもので前半部
５ａ内面に付着する汚泥固形物をプレード１３で
掻き取り液が前半部５ａを通過する際の抵抗を
できるだけ小さくし、液排出量を多くすること
を目的としている。すなわち、ブレード１３は前
半部５ａ内部のスチーム導入管９に固定配備され
ており、その自由端は前半部５ａの内面に接し該
内面を擦過ないし摺動できるように取り付けられ
ており、後半部５ｂの回転によつて回転し、前記
内面に付着する汚泥固形物を掻き取るよう構成さ
れている。 The dehydrator shown in FIGS. 3 and 4 has a flexible blade 13 attached inside the front half 5a, and the blade 13 scrapes off solid sludge adhering to the inner surface of the front half 5a. The purpose is to minimize the resistance during passage and increase the amount of liquid discharged. That is, the blade 13 is fixedly disposed on the steam introduction pipe 9 inside the front half 5a, and its free end is attached so that it can rub or slide against the inner surface of the front half 5a, and the blade 13 is attached so that it can rub or slide on the inner surface of the front half 5a. is rotated by the rotation of the inner surface, and is configured to scrape off solid sludge adhering to the inner surface.
前記実施例の脱水機においては、前半部５ａと
後半部５ｂの分割比率（スクリユー軸５の長手方
向の長さの比）は１：４の割合が最もよい。 In the dehydrator of the above embodiment, the division ratio between the first half 5a and the second half 5b (ratio of lengths in the longitudinal direction of the screw shaft 5) is best set to 1:4.
すなわち、前記比率が１：４より小さくなる
（1/4より小）と前半部５ａにおける汚泥の滞留時
間が短くなり、しかも前半部５ａ始端と終端にお
ける外筒３、スクリユー羽根４および前半部５ａ
より形成される環状間隙の縮小比率が１に近く、
容積縮小によつて汚泥に圧搾圧力を加えることが
できないことなどにより、液の分離量が少なく
その効果は小さくなる。また、前記比率が１：４
より大きくなると前半部５ａにおける汚泥滞留時
間は長くなり、しかも前半部５ａ始端と終端にお
ける外筒３、スクリユー羽根４および前半部５ａ
より形成される環状間隙の縮小比率が大きくな
り、これによつて汚泥に圧搾圧力を加えることが
でき、この部分の液の分離量は大きくなるが、
逆に加熱流体を内部に通し汚泥の温度を高めなが
ら脱水するスクリユー軸５部分の汚泥の滞留時間
が短くなり、汚泥の温度が十分高くなる前にケー
キ排出口６より汚泥が排出されてしまい、この部
分における汚泥の加熱効果が小さくなる。 That is, when the ratio is smaller than 1:4 (less than 1/4), the residence time of sludge in the front half 5a becomes shorter, and the outer cylinder 3, the screw blade 4 and the front half 5a at the start and end of the front half 5a become shorter.
The reduction ratio of the annular gap formed by this is close to 1,
Due to the volume reduction, it is not possible to apply squeezing pressure to the sludge, so the amount of liquid separated is small and its effectiveness is reduced. Also, the ratio is 1:4
If the size is larger, the sludge retention time in the first half 5a becomes longer, and the outer cylinder 3, the screw blade 4 and the first half 5a at the start and end of the first half 5a become longer.
The reduction ratio of the annular gap formed by this increases, which makes it possible to apply squeezing pressure to the sludge, and the amount of liquid separated in this area increases, but
On the contrary, the residence time of the sludge in the screw shaft 5, which dewaters the sludge by passing the heating fluid inside and increasing the temperature of the sludge, becomes shorter, and the sludge is discharged from the cake discharge port 6 before the temperature of the sludge becomes sufficiently high. The effect of heating the sludge in this area is reduced.
上記実施例において、前半部５ａは汚泥ホツパ
２に固定して取り付けられているが、後半部５ｂ
との接続は、後半部５ｂが回転可能な状態でしか
も投入された汚泥が前半部５ａの内部に漏出しな
いように外圧に対しシール可能に取り付けること
が好ましく、そのためには通常、いんろう継手状
にて接続を行なうことができる。 In the above embodiment, the first half 5a is fixedly attached to the sludge hopper 2, but the second half 5b
It is preferable to connect the rear part 5b with a rotatable state and to seal it against external pressure so that the introduced sludge does not leak into the inside of the front part 5a. Connection can be made at
前半部５ａはその一部あるいは全面を材とし
ているが、材部分の面積が大きいほど効果は大
きくなり、機械的強度の関係を加味して可能なか
ぎり大きくするのがよい。また、加熱流体を上記
実施例と逆向きに、すなわちケーキ排出口６側か
ら導入できる構造にしてもよく、この場合、例え
ば加熱用流体としてのスチームを後半部５ｂ内の
みに供給し、ドレーンをスクリユー軸駆動軸７内
に貫通配備した吸引管により吸引排出するように
してもよい。 The front half 5a is partially or entirely made of wood, but the larger the area of the wood, the greater the effect, and it is best to make it as large as possible, taking into account the relationship of mechanical strength. Alternatively, the structure may be such that the heating fluid can be introduced in the opposite direction to the above embodiment, that is, from the cake discharge port 6 side. In this case, for example, steam as the heating fluid is supplied only into the rear half 5b, and the drain is closed. The liquid may be suctioned and discharged by a suction tube provided through the screw shaft drive shaft 7.
なお、前記後半部５ｂのみを電熱ヒータにより
加熱する構造にすることもできる。 Note that it is also possible to adopt a structure in which only the rear half portion 5b is heated by an electric heater.
以上のべたように本考案のスクリユープレス型
脱水機は、スクリユー軸を前半部と後半部に分割
すると共に前半部スクリユー軸を固定配備し、し
かもその表面の一部あるいは全面を材とするこ
とによつて、汚泥処理量を増大させると共に脱水
ケーキの含水率を低下させることができるうえ、
ケーキ排出口より排出される脱水ケーキ量をより
低下させ安定した状態で排出させることができ、
しかもスクリユー軸前半部５ａがスクリユー羽根
４とは切りはなされて固定配備されているため、
この表面に生成する濃縮汚泥はスクリユー羽根４
によつて常に掻き取られ、濃縮汚泥による材表
面の開塞がなく、炉過速度が大きくとれるなどに
より、この部分で第１図の脱水機にくらべ短時間
でより高い固形物濃度の濃縮汚泥を得ることがで
き、これによつて後半部５ｂで使用する蒸気の量
がはるかに少なくて脱水が可能になるほか汚泥の
供給口側、即ち前半部での脱水の向上、またスク
リユー羽根によつて前半部の材に付着した汚泥
の掻取りが容易にでき、即ちスクリユー溝に投入
された汚泥は外筒３面だけで脱水される従来機に
くらべ外筒３及び前半部５ａの両面で脱水される
ため材に対する見掛け汚泥厚は従来機の1/2に
なり、しかも前半部５ａがスクリユー羽根４とは
切りはなされて固定配備されているため、この表
面に生成したケーキはスクリユー羽根４の回転に
よつて常に掻き取られるため、前半部の濃縮汚泥
（ケーキ）による材表面の閉塞がなく炉過抵抗
が大きくならないため炉過速度が大きくとれ、こ
れらによる処理能力増大が可能となり経済的な汚
泥処理ができるなどの効果が得られるものであ
る。 As mentioned above, the screw press type dehydrator of the present invention has the screw shaft divided into the front half and the rear half, the front half screw shaft is fixedly arranged, and a part or the entire surface of the screw shaft is made of material. In addition to increasing the amount of sludge treated and reducing the water content of the dehydrated cake,
The amount of dehydrated cake discharged from the cake discharge port can be further reduced and discharged in a stable state.
Moreover, since the screw shaft front half 5a is separated from the screw blade 4 and is fixedly provided,
The thickened sludge generated on the surface of the screw blade 4
Because the material surface is not clogged with thickened sludge and the furnace overspeed is large, thickened sludge with a higher solids concentration can be produced in this area in a shorter time than with the dehydrator shown in Figure 1. This makes it possible to dewater with a much smaller amount of steam used in the second half 5b, and also improves dewatering on the sludge supply port side, that is, the first half, and improves dewatering with the screw blade. This makes it easy to scrape off sludge adhering to the material in the front half.In other words, the sludge put into the screw groove is dewatered on both sides of the outer cylinder 3 and the front half 5a, compared to the conventional machine where the sludge is dewatered only on the three sides of the outer cylinder. As a result, the apparent sludge thickness relative to the material is 1/2 that of the conventional machine.Moreover, since the front half 5a is separated from the screw blade 4 and is fixedly disposed, the cake formed on this surface is separated from the screw blade 4. Since it is constantly scraped by rotation, the material surface is not blocked by the thickened sludge (cake) in the first half, and the furnace overresistance does not become large, so the furnace overspeed can be increased, which makes it possible to increase the processing capacity and is economical. This provides benefits such as sludge treatment.
第１図は従来例の縦断面図、第２図は本考案の
一実施例の縦断面図、第３図は別の実施例の縦断
面図、第４図は第３図Ａ−Ａ線断面図である。
１……汚泥供給口、２……汚泥ホツパ、３……
外筒、４……スクリユー羽根、５……スクリユー
軸、５ａ……前半部、５ｂ……後半部、６……ケ
ーキ排出口、７……スクリユー軸駆動軸、８……
スクリユー軸駆動装置、９……スチーム導入管、
９ａ……断熱材、９ｂ……スチーム吹入口、１０
……ドレーン吐出口、１１ａ，１１ｂ……軸受、
１２……液排出口、１３……ブレード。
Fig. 1 is a longitudinal sectional view of a conventional example, Fig. 2 is a longitudinal sectional view of one embodiment of the present invention, Fig. 3 is a longitudinal sectional view of another embodiment, and Fig. 4 is a line taken along line A-A in Fig. 3. FIG. 1...Sludge supply port, 2...Sludge hopper, 3...
Outer cylinder, 4... Screw blade, 5... Screw shaft, 5a... First half, 5b... Second half, 6... Cake discharge port, 7... Screw shaft drive shaft, 8...
Screw shaft drive device, 9... steam introduction pipe,
9a...Insulating material, 9b...Steam inlet, 10
...Drain outlet, 11a, 11b...Bearing,
12...liquid discharge port, 13...blade.
Claims (1)
筒型材の外筒３内にスクリユー羽根４を外周
に有し、しかも内部を加熱流体で加熱可能とし
たスクリユー軸５を回転自在に配備すると共に
前記外筒３、スクリユー軸５およびスクリユー
羽根４により形成される間隙をケーキ排出口６
側に向かつて順次縮小せしめ、前記スクリユー
軸５の回転で汚泥を圧搾脱水しつつ前記ケーキ
排出口６から排出するスクリユープレス型脱水
機において、 前記スクリユー軸５を少なくとも一部が材
により形成された前記汚泥供給口１側の前半部
５ａとケーキ排出口６側の後半部５ｂに分割し
て前半部５ａを固定配備し、該前半部５ａに位
置するスクリユー羽根４を該前半部５ａと切り
離すと共に前記後半部５ｂにより回転可能とな
したことを特徴とするスクリユープレス型脱水
機。 ２ 前記前半部５ａが、その内部に、外面に該前
半部５ａ内面への付着物を掻き取るための可撓
性ブレードを有し前記後半部５ｂと一体で回転
する加熱流体導入管を備えたものである実用新
案登録請求の範囲第１項記載の脱水機。[Scope of Claim for Utility Model Registration] 1. A screw shaft having screw blades 4 on the outer periphery within an outer cylinder 3 of a cylindrical material having a sludge supply port 1 and a cake discharge port 6, and the inside of which can be heated with heating fluid. 5 is rotatably arranged, and the gap formed by the outer cylinder 3, screw shaft 5, and screw blade 4 is connected to a cake discharge port 6.
In a screw press type dewatering machine, the screw shaft 5 is gradually reduced in size toward the side, and the screw shaft 5 is compressed and dehydrated by rotation of the screw shaft 5 and discharged from the cake discharge port 6. The first half 5a is divided into a front half 5a on the sludge supply port 1 side and a second half 5b on the cake discharge port 6 side, and the first half 5a is fixedly provided, and the screw blade 4 located in the first half 5a is separated from the first half 5a. The screw press type dehydrator is characterized in that the screw press type dehydrator is rotatable by the rear part 5b. 2. The front half part 5a is provided with a heated fluid introduction pipe which has a flexible blade on the outer surface for scraping off deposits on the inner surface of the first half part 5a and rotates integrally with the second half part 5b. A dehydrator according to claim 1, which is a utility model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2898283U JPS59135891U (en) | 1983-03-02 | 1983-03-02 | Screw press type dehydrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2898283U JPS59135891U (en) | 1983-03-02 | 1983-03-02 | Screw press type dehydrator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59135891U JPS59135891U (en) | 1984-09-11 |
| JPS6239913Y2 true JPS6239913Y2 (en) | 1987-10-12 |
Family
ID=30159847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2898283U Granted JPS59135891U (en) | 1983-03-02 | 1983-03-02 | Screw press type dehydrator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59135891U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57174198A (en) * | 1981-04-21 | 1982-10-26 | Japan Organo Co Ltd | Dehydrating method for organic sludge |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS592955Y2 (en) * | 1979-03-02 | 1984-01-26 | 荏原インフイルコ株式会社 | Screw press type dehydrator |
-
1983
- 1983-03-02 JP JP2898283U patent/JPS59135891U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57174198A (en) * | 1981-04-21 | 1982-10-26 | Japan Organo Co Ltd | Dehydrating method for organic sludge |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59135891U (en) | 1984-09-11 |
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