JPS6345845B2 - - Google Patents
Info
- Publication number
- JPS6345845B2 JPS6345845B2 JP13939780A JP13939780A JPS6345845B2 JP S6345845 B2 JPS6345845 B2 JP S6345845B2 JP 13939780 A JP13939780 A JP 13939780A JP 13939780 A JP13939780 A JP 13939780A JP S6345845 B2 JPS6345845 B2 JP S6345845B2
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- inorganic solids
- municipal waste
- sedimentation
- solids
- 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
- 229910003480 inorganic solid Inorganic materials 0.000 claims description 46
- 239000002002 slurry Substances 0.000 claims description 46
- 239000002699 waste material Substances 0.000 claims description 35
- 238000003756 stirring Methods 0.000 claims description 30
- 238000004062 sedimentation Methods 0.000 claims description 29
- 238000000926 separation method Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 27
- 239000007787 solid Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000010806 kitchen waste Substances 0.000 description 13
- 239000004033 plastic Substances 0.000 description 8
- 229920003023 plastic Polymers 0.000 description 8
- 239000011521 glass Substances 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 230000005484 gravity Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000009264 composting Methods 0.000 description 3
- 230000029087 digestion Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- -1 gravel Substances 0.000 description 3
- 238000007873 sieving Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 230000004151 fermentation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Description
【発明の詳細な説明】
本発明は、都市ごみより無機固形物を分離除去
する方法に係り、特に沈降分離を採用した都市ご
み無機固形物分離方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for separating and removing inorganic solids from municipal waste, and particularly to a method for separating inorganic solids from municipal waste that employs sedimentation separation.
我国では、家庭から排出される厨芥は紙とかプ
ラスチツク等他の成分と混合して収集され、その
まま焼却により処分されているのが現状である。
しかし、水分の多い厨芥の焼却は、焼却設備の故
障の原因となり、また、それだけ補助焼料の重油
を多量に消費することになる。従つて、厨芥を他
のごみと区別して収集するが、混合収集後に厨芥
のみ分別し、別途厨芥に適した方法により処理す
ることが望ましい。しかし、前者は、収集車や作
業者を増やさなければならず経費がかかる欠点が
ある。後者は国内外でも研究されつつあり、分別
した厨芥フラクシヨンを発酵原料として用いた
り、コンポスト処理や嫌気性消化する技術の開発
も進められている。 In our country, kitchen waste from households is currently collected mixed with other components such as paper and plastic, and then disposed of as is by incineration.
However, incineration of kitchen waste with a high moisture content may cause failure of incineration equipment, and also consumes a large amount of heavy oil as auxiliary incineration material. Therefore, although kitchen waste is collected separately from other waste, it is desirable to separate only the kitchen waste after mixed collection and to separately process it using a method suitable for kitchen waste. However, the former method has the disadvantage of requiring more collection vehicles and workers, which is costly. The latter is being researched both domestically and internationally, and progress is being made in developing technologies for using separated kitchen waste fractions as fermentation raw materials, composting, and anaerobic digestion.
しかし、現在の分別した厨芥フラクシヨン中に
は、紙、プラスチツクス、ガラス片、金属片、礫
といつた不純物がまだ多量に含まれていることか
ら、これを直ちに発酵やコンポスト及び嫌気性消
化の原料として用いることには多くの問題があ
る。特に、ガラス片、金属片、礫等の無機固形物
は輪送経路及び処理槽内への不純物沈積や装置の
摩耗等を生じせしめ、事故発生の大きな要因とな
る。コンポスト処理に至つては、製品コンポスト
中に多量に含まれるこれらの不純物により、実験
的な商品価値がなくなつてしまう。従つて、上記
した厨芥処理技術を適用するにあたつては厨芥フ
ラクシヨン中への無機固形物混入を極力防ぐこと
が肝要となる。 However, current separated kitchen waste fractions still contain a large amount of impurities such as paper, plastics, glass pieces, metal pieces, and gravel, so they are immediately removed by fermentation, composting, and anaerobic digestion. There are many problems with using it as a raw material. In particular, inorganic solids such as glass pieces, metal pieces, gravel, etc. cause impurity deposition in the transport route and processing tank, wear of equipment, etc., and are a major factor in the occurrence of accidents. When it comes to composting, the large amount of these impurities contained in the product compost makes the experimental commercial value disappear. Therefore, when applying the above-mentioned kitchen waste treatment technology, it is important to prevent inorganic solids from being mixed into the kitchen waste fraction as much as possible.
都市ごみから無機固形物を分離する方法は、乾
式法と湿式法に大別される。前者は、篩い分けを
主体とするものであり、現在開発が進められてい
る都市ごみ分別システムはほとんどがこの方法を
採用している。しかしながら、多量の水分を含み
粘着性を有する厨芥と一般ごみを激しく混合する
篩い分け操作は、逆に両者の結合を招くことにな
る。従つて篩い分け法による分別システムでは、
不純物を完全に取除くことは非常に困難である。 Methods for separating inorganic solids from municipal waste are broadly divided into dry methods and wet methods. The former method is mainly based on sieving, and most municipal waste separation systems currently under development adopt this method. However, a sieving operation in which kitchen waste, which contains a large amount of water and is sticky, and general waste are vigorously mixed together may cause the two to combine. Therefore, in a separation system using the sieving method,
It is very difficult to completely remove impurities.
一方、後者の湿式法は都市ごみに水を加えてス
ラリー状にした後分離する方法であり、主として
固形物の比重差を用いている。都市ごみにスラリ
ーの場合、プラスチツクやガラス片、金属片等こ
れらの粒子の比重が広範囲に分布しているため、
明確に分別することは困難である。また、紙、プ
ラスチツク等の繊維状のものがスラリー中に分散
するため、比重の大きいガラスや陶器片等の無機
固形物でも、これらの繊維の間に保持され容易に
沈降しない。このため、通常用いられる重力沈降
法や液体サイクロン法は、ごみスラリー濃度が薄
い場合にのみ適用可能であり、濃厚スラリーには
用いることができない。 On the other hand, the latter wet method is a method in which water is added to municipal waste to form a slurry and then separated, and mainly uses the difference in specific gravity of solids. In the case of slurry in municipal waste, the specific gravity of particles such as plastic, glass pieces, and metal pieces is distributed over a wide range, so
It is difficult to clearly separate them. Furthermore, since fibrous materials such as paper and plastic are dispersed in the slurry, even inorganic solid materials such as glass and ceramic pieces having a large specific gravity are held between these fibers and do not easily settle. For this reason, the commonly used gravity sedimentation method and hydrocyclone method are applicable only when the concentration of the waste slurry is low, and cannot be used for thick slurries.
本発明の目的は上記の欠点に鑑み、都市ごみか
らの無機固形物を明確に分別する都市ごみ無機固
形物分離除去方法を提供するにある。 SUMMARY OF THE INVENTION In view of the above drawbacks, an object of the present invention is to provide a method for separating and removing inorganic solids from municipal waste, which clearly separates inorganic solids from municipal waste.
本発明により上記の目的は、都市ごみに水を加
えてスラリー化し固形分濃度７〜15重量％のスラ
リーとした後、リボン型攪拌翼による緩速撹拌下
で沈降分離を行ない、無機固形物を効率良く分離
除去することにより達成される。 According to the present invention, the above-mentioned purpose is achieved by adding water to municipal waste to form a slurry with a solid content concentration of 7 to 15% by weight, and then performing sedimentation separation under slow stirring using a ribbon-type stirring blade to remove inorganic solids. This is achieved by efficient separation and removal.
以下、本発明の実施例を図面に従つて説明す
る。実施例を説明する前に本発明の基本原理につ
いて説明する。 Embodiments of the present invention will be described below with reference to the drawings. Before explaining embodiments, the basic principle of the present invention will be explained.
本発明は、都市ごみより無機固形物を除く方法
として湿式分離法がより効率的であると考え、都
市ごみに加えてスラリーとした後、沈降分離する
方法を検討することによりなされたものである。
その結果、固形分濃度７〜15重量％のスラリーを
単に静置したのみではほとんど沈降が認められな
いのに対し、スラリーにわずかな撹拌を施こすこ
とによつて、無機固形物の沈降量が著しく増加す
ることが認められた。 The present invention was achieved by considering a wet separation method to be a more efficient method for removing inorganic solids from municipal waste, and by investigating a method of adding slurry to municipal waste and then sedimentation separation. .
As a result, when a slurry with a solid content concentration of 7 to 15% by weight was simply allowed to stand, almost no sedimentation was observed, but by slightly stirring the slurry, the amount of sedimentation of inorganic solids was reduced. A significant increase was observed.
第１図は本発明に係る都市ごみ無機固形物分離
除去方法の一実施例を説明する説明図である。 FIG. 1 is an explanatory diagram illustrating an embodiment of the method for separating and removing inorganic solids from municipal waste according to the present invention.
上部が円筒形、下部は逆円錐形状をした沈降分
離槽１２の中に撹拌機軸１４に取付けられたリボ
ン型撹拌翼１６が設置されている。この沈降分離
槽１２の下部にはロータリーバルブ１８を介して
無機固形物排出管２０が接続されている。 A ribbon-type stirring blade 16 attached to an agitator shaft 14 is installed in a sedimentation separation tank 12 having a cylindrical upper part and an inverted conical lower part. An inorganic solid discharge pipe 20 is connected to the lower part of the sedimentation separation tank 12 via a rotary valve 18.
先ず、厨芥、紙、プラスチツク、金属、礫、陶
器片等を含む混合収集都市ごみに水を加え、固形
分濃度７〜15重量％のスラリーを調製する。この
スラリー化する場合、水を用いることに限定され
るものではなく、下水汚泥、活性汚泥処理水、嫌
気性消化脱離水等を用いてもよい。 First, water is added to mixed collected municipal waste containing kitchen waste, paper, plastic, metal, gravel, pottery pieces, etc. to prepare a slurry having a solid content concentration of 7 to 15% by weight. When forming this slurry, it is not limited to using water, but sewage sludge, activated sludge treated water, anaerobic digestion desorbed water, etc. may also be used.
次に、持ち上げ流を生ぜしめるリボン型撹拌翼
１６を有する沈降分離槽１２にスラリー化した都
市ごみを上部より投入する。この際、リボン型撹
拌翼１６の回転速度は、槽壁におけるスラリーの
水平方向の回転角速度が0.005〜1.5rad／secにな
るようにして、緩速撹拌を行ないつつ無機固形物
の沈降分離を行なう。この場合分離可能な無機固
形物は、ガラス、金属、礫、陶器片、貝殻等であ
る。 Next, the slurry of municipal waste is charged from above into a sedimentation separation tank 12 having ribbon-type stirring blades 16 that generate an uplifting flow. At this time, the rotational speed of the ribbon-type stirring blades 16 is set such that the rotational angular velocity in the horizontal direction of the slurry on the tank wall is 0.005 to 1.5 rad/sec to perform sedimentation and separation of inorganic solids while performing slow stirring. . In this case, the inorganic solids that can be separated are glass, metal, gravel, ceramic pieces, shells, etc.
通常、都市ごみスラリーの場合、固形物濃度が
３重量％以上になると、スラリー中に分散した
紙、プラスチツク等の繊維成分の為流動性が著し
く低下し、７重量％以上になると静置重力沈降法
による固形物分離除去はほとんど不可能になる。
比重の大きな無機固形物でさえも、スラリー中に
分散した繊維によつて保持されほとんど沈降しな
い。 Normally, in the case of municipal waste slurry, when the solid content concentration exceeds 3% by weight, the fluidity decreases significantly due to fiber components such as paper and plastic dispersed in the slurry, and when it exceeds 7% by weight, it settles due to static gravity. Separation and removal of solids by method becomes almost impossible.
Even inorganic solids with high specific gravity are retained by the fibers dispersed in the slurry and hardly settle.
しかるに、本実施例によれば、この濃度ごみス
ラリーに槽壁におけるスラリーの回転角速度が
0.005〜1.5rad／secという弱い撹拌をリボン型攪
拌翼によつて行なうことにより、無機固形物のみ
を極めて効率的に沈降分離する効果がある。 However, according to this embodiment, the rotational angular velocity of the slurry on the tank wall is
By performing weak stirring of 0.005 to 1.5 rad/sec using a ribbon-type stirring blade, it is effective to sediment and separate only inorganic solids very efficiently.
沈降分離の際の最適な撹拌条件は、上記した回
転角速度の範囲内にあり、過剰な撹拌は沈降分離
の妨げとなる。また、この撹拌はスラリーに単な
る回転を与えるのみでは効果が少なく、撹拌翼に
よつてスラリー中の固形物を持ち上げるような撹
拌を伴なうことが必要である。逆に撹拌翼で押し
下げる撹拌を行なつた場合は、スラリー中の全固
形物が、沈降圧密化し無機固形物のみを分離除去
することができなくなる。 The optimum stirring conditions for sedimentation separation are within the range of the rotational angular velocity described above, and excessive stirring will impede sedimentation separation. Further, this stirring is not effective if the slurry is simply rotated, and it is necessary to use stirring blades to lift the solids in the slurry. On the other hand, if stirring is performed by pushing down with a stirring blade, all the solids in the slurry will settle and become compacted, making it impossible to separate and remove only the inorganic solids.
更に、撹拌翼としては、持ち上げ流を効果的に
生ぜしめる形状のものとし、特にスラリー固形分
濃度が７重量％以上の濃厚スラリーであるのでリ
ボン型のものを用いる。また沈降分離槽の形状と
しては特に限定するものではないが、本実施例の
形状をとることが撹拌及び沈降を最も効率良く行
なわせることができる。なお、スラリー固形分濃
度が15重量％以上ではスラリーの流動性が失なわ
れ固形物を分離することは極めて困難となる。 Furthermore, the stirring blades should be shaped to effectively generate a lifting flow, and in particular, ribbon-shaped blades are used since the slurry is a thick slurry with a solid content concentration of 7% by weight or more. Although the shape of the sedimentation tank is not particularly limited, the shape of this embodiment allows stirring and sedimentation to be performed most efficiently. Note that if the slurry solid content concentration is 15% by weight or more, the fluidity of the slurry is lost and it becomes extremely difficult to separate the solids.
第２図は本実施例を用いた場合の沈降する無機
固形物の量を求めたものである。但し、以下の条
件によつて行なつた結果である。 FIG. 2 shows the amount of inorganic solids that settle when using this example. However, the results were obtained under the following conditions.
厨芥20重％、ガラス、礫、金属、陶器片、貝殻
等無機固形物35重量％、紙30重量％、プラスチツ
ク５重量％（いずれも乾基準）を含む混合集収都
市ごみ（含水率56重量％）に水を加え固形分濃度
３〜18重量％のスラリーを調製したものを用い
た。次いで、このスラリーを第１図に示す内容積
12の沈降分離槽１２に投入し所定の速度で撹拌
を行ない、５分間に沈降する無機固形物量を求め
た。 Mixed collection municipal waste containing 20% kitchen waste, 35% inorganic solids such as glass, gravel, metals, pottery pieces, and shells, 30% paper, and 5% plastic (all on a dry basis) (water content 56% by weight) ) was added with water to prepare a slurry having a solid content concentration of 3 to 18% by weight. Next, this slurry is made into the internal volume shown in Fig. 1.
12 sedimentation separation tanks 12 and agitation was performed at a predetermined speed to determine the amount of inorganic solids that would settle in 5 minutes.
図に示す如く実用に耐える無機固形物除去率80
％を得るには、スラリー固形物濃度３〜15重量％
において、スラリー角速度0.005〜1.5rad／secを
与える撹拌が必要であることが分り、ごみスラリ
ー固形分濃度とスラリー回転角速度及び無機固形
物除去率との関係が明らかとなつた。またリボン
型攪拌翼により緩速攪拌を行えば固形分濃度７重
量％以上の濃厚スラリーでも沈降分離可能である
ことがわかつた。なお図中Ａは除去率80％、Ｂは
除去率90％の線を示している。 As shown in the figure, the inorganic solids removal rate is 80, which is suitable for practical use.
Slurry solids concentration 3-15% by weight to obtain %
It was found that stirring to give the slurry an angular velocity of 0.005 to 1.5 rad/sec was necessary, and the relationship between the solid content concentration of the waste slurry, the slurry rotational angular velocity, and the inorganic solids removal rate was clarified. It was also found that if slow stirring was performed using a ribbon-type stirring blade, even a thick slurry with a solid content of 7% by weight or more could be sedimented and separated. Note that in the figure, A indicates a line with a removal rate of 80%, and B indicates a line with a removal rate of 90%.
第３図は本発明に係る都市ごみ無機固形物分離
除去方法の他の実施例を説明する説明図である。
但し、第１図と同様あるいは同一構成部分は同一
符号を用いて示してある。 FIG. 3 is an explanatory diagram illustrating another embodiment of the method for separating and removing inorganic solids from municipal waste according to the present invention.
However, similar or identical components to those in FIG. 1 are indicated using the same reference numerals.
沈降分離槽１２の中に撹拌機軸１４に取付けら
れたリボン型撹拌翼１６が設置されている。この
沈降分離槽１２の下部にはロータリーバルブ１８
を介して無機固形物排出管２０が接続されてい
る。またこの沈降分離槽１２には原料スラリー投
入管２２と処理スラリー抜出管２４が取付けてあ
る。 A ribbon-type stirring blade 16 attached to an agitator shaft 14 is installed in the settling tank 12 . A rotary valve 18 is located at the bottom of this sedimentation separation tank 12.
An inorganic solids discharge pipe 20 is connected through the inorganic solids discharge pipe 20. Further, a raw material slurry input pipe 22 and a treated slurry withdrawal pipe 24 are attached to the sedimentation separation tank 12.
この沈降分離槽１２に、先きの実施例と同一の
都市ごみを原料として、固形分濃度12％のスラリ
ー200Kgを調製したものを原料スラリー投入管２
２から投入した。この沈降分離槽１２は有効容積
30で、スラリーの平均槽内滞留時間10分、スラ
リー回転角速度0.15rad／secで連続沈降分離操作
を実施した。その結果は無機固形物濃度0.37重量
％のごみスラリー180Kgを得た。また、無機固形
物画分として15Kg（無機固形物6.5Kg）を分離し
た。無機固形物除去率は90重量％であつた。 Into this sedimentation separation tank 12, 200 kg of slurry with a solid content concentration of 12% was prepared using the same municipal waste as in the previous example, and was added to the raw material slurry input pipe 2.
I put it in from 2. This sedimentation separation tank 12 has an effective volume
30, continuous sedimentation separation operation was carried out at an average residence time of the slurry in the tank of 10 minutes and a slurry rotational angular velocity of 0.15 rad/sec. As a result, 180 kg of waste slurry with an inorganic solid content of 0.37% by weight was obtained. In addition, 15 kg (6.5 kg of inorganic solids) was separated as an inorganic solid fraction. The inorganic solids removal rate was 90% by weight.
また、厨芥45重量％、ガラス、礫、金属、陶器
片、貝殻等無機挾雑物10重量％、紙28重量％、プ
ラスチツク４重量％（いずれも乾基準）を含む混
合集収都市ごみ（含水率63重量％）48.0Kgに、都
市下水処理汚泥（固形分1.8重量％）152Kgを加
え、固形分濃度10重量％のスラリーを200Kg調製
した。次いで、第３図と同一の沈降分離槽１２を
用い、平均槽内滞留時間８分、スラリー回転角速
度0.25rad／secで連続沈降分離を実施した。その
結果、無機固形物濃度0.05重量％のごみスラリー
190Kgを得た。また、無機固形画分として５Kg
（無機固形物1.7Kg）を分離した。無機固形物除去
率は95重量％であつた。 In addition, mixed municipal waste (moisture content) containing 45% by weight of kitchen waste, 10% by weight of inorganic miscellaneous materials such as glass, gravel, metals, pottery pieces, and shells, 28% by weight of paper, and 4% by weight of plastics (all on a dry basis) 152 kg of municipal sewage treatment sludge (solid content 1.8 wt%) was added to 48.0 kg (63 wt%) to prepare 200 kg of slurry with a solid content concentration of 10 wt%. Next, continuous sedimentation separation was performed using the same sedimentation separation tank 12 as shown in FIG. 3 at an average residence time in the tank of 8 minutes and a slurry rotational angular velocity of 0.25 rad/sec. As a result, a waste slurry with an inorganic solids concentration of 0.05% by weight
Obtained 190Kg. In addition, 5 kg as an inorganic solid fraction
(1.7Kg of inorganic solids) was separated. The inorganic solids removal rate was 95% by weight.
本実施例においても、濃厚ごみスラリーにリボ
ン型攪拌翼で持ち上げ流を生じさせ且つ弱い撹拌
を行なうことにより、無機固形物のみを極めて効
率的に沈降分離する効果がある。 In this example as well, by creating a lifting flow in the thick waste slurry using a ribbon-type stirring blade and performing weak stirring, it is effective to sedimentally separate only inorganic solids very efficiently.
無機固形分濃度10重量％のスラリーについて、
沈降分離槽で単に沈降させた場合［イ］と、パド
ル翼攪拌（回転角速度0.55rad／sec）した場合
［ロ］と、第１図に示す本発明の方法によりリボ
ン型攪拌翼で攪拌（回転角速度0.55rad／sec）し
た場合［ハ］について２分間実験した結果、［イ］
が10％、［ロ］が30％及び［ハ］が６％という無
機固形物除去率が得られ、本発明により顕著な効
果が得られることが確認された。 Regarding slurry with an inorganic solid content concentration of 10% by weight,
In the case of simple sedimentation in a sedimentation separation tank [A], in the case of paddle blade stirring (rotational angular velocity of 0.55 rad/sec) [B], and the case of stirring (rotating) with a ribbon-type stirring blade by the method of the present invention shown in Figure 1. When the angular velocity is 0.55 rad/sec), as a result of a 2-minute experiment on [C], [A]
An inorganic solids removal rate of 10% for [B], 30% for [B] and 6% for [C] was obtained, and it was confirmed that the present invention has a remarkable effect.
以上の説明から明らかなように本発明によれ
ば、スラリー化した都市ごみを緩速撹拌で沈降分
離することにより、都市ごみからの無機固形物を
明確に分別する都市ごみ無機固形物分離除去方法
を提供することができる。 As is clear from the above description, according to the present invention, a method for separating and removing inorganic solids from municipal waste clearly separates inorganic solids from municipal waste by sedimentation-separating slurry-formed municipal waste by slow stirring. can be provided.
第１図は本発明に係る都市ごみ無機固形物分離
除去方法の一実施例を示す説明図、第２図はごみ
スラリー固形分濃度と槽壁におけるスラリー回転
角速度との関係を示す線図、第３図は本発明に係
る都市ごみ無機固形物分離除去方法の他の実施例
を示す説明図である。
１２……沈降分離槽、１６……リボン型撹拌
翼。
FIG. 1 is an explanatory diagram showing an example of the method for separating and removing inorganic solids from municipal waste according to the present invention, FIG. FIG. 3 is an explanatory diagram showing another embodiment of the method for separating and removing inorganic solids from municipal waste according to the present invention. 12... Sedimentation separation tank, 16... Ribbon type stirring blade.
Claims (1)
無機固形物を分離する都市ごみ無機固形物分離除
去方法において、前記沈降分離槽にリボン型攪拌
翼を設け、都市ごみに水を加えて固形分濃度７〜
15重量％のスラリーとしたものを前記沈降分離槽
に投入し、前記攪拌翼にて該スラリーに持ち上げ
流を生ぜしめ、槽壁部分のスラリーの水平方向の
回転角速度が0.005〜1.5rad／secになるように緩
速攪拌しながら無機固形物を沈降分離することを
特徴とする都市ごみ無機固形物分離除去方法。1. In a municipal waste inorganic solids separation and removal method that uses a sedimentation separation tank to separate inorganic solids contained in municipal waste, a ribbon-type stirring blade is provided in the sedimentation separation tank, and water is added to the municipal waste to separate the solids. Minute concentration 7~
A 15% by weight slurry is put into the sedimentation separation tank, and the stirring blades create a lifting flow in the slurry, so that the horizontal rotational angular velocity of the slurry on the tank wall is 0.005 to 1.5 rad/sec. A method for separating and removing inorganic solids from municipal waste, characterized in that inorganic solids are separated by sedimentation while being slowly stirred so that the inorganic solids are separated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13939780A JPS5765337A (en) | 1980-10-07 | 1980-10-07 | Separation and removal of inorganic solids from urban refuge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13939780A JPS5765337A (en) | 1980-10-07 | 1980-10-07 | Separation and removal of inorganic solids from urban refuge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5765337A JPS5765337A (en) | 1982-04-20 |
| JPS6345845B2 true JPS6345845B2 (en) | 1988-09-12 |
Family
ID=15244323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13939780A Granted JPS5765337A (en) | 1980-10-07 | 1980-10-07 | Separation and removal of inorganic solids from urban refuge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5765337A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004024791B4 (en) * | 2004-05-17 | 2012-10-31 | Hans-Joachim Brauer | Process for separating solids from a solid mixture |
-
1980
- 1980-10-07 JP JP13939780A patent/JPS5765337A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5765337A (en) | 1982-04-20 |
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