JPH1085794A - Sludge treatment method - Google Patents

Sludge treatment method

Info

Publication number
JPH1085794A
JPH1085794A JP8245334A JP24533496A JPH1085794A JP H1085794 A JPH1085794 A JP H1085794A JP 8245334 A JP8245334 A JP 8245334A JP 24533496 A JP24533496 A JP 24533496A JP H1085794 A JPH1085794 A JP H1085794A
Authority
JP
Japan
Prior art keywords
sludge
oil
cooker
condenser
medium oil
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.)
Pending
Application number
JP8245334A
Other languages
Japanese (ja)
Inventor
Shuzo Nakazono
修三 中園
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP8245334A priority Critical patent/JPH1085794A/en
Publication of JPH1085794A publication Critical patent/JPH1085794A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To prevent a feed line from being clogged with viscous sludge by applying medium oil onto the inner wall surface of the line. SOLUTION: The sludge treatment system comprises a sludge receiving hopper A, a feed pump B, a preliminary treatment tank C, a cooker D, the internal pressure of which is reduced and in which heating oil is stored, a mist catcher E, and a condenser F. Furthermore, medium oil is added to sludge in the hopper A to provide a function of lubricating oil, when the sludge is sent, under pressure, to the tank C by the pump B.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は、汚泥処理方法に
関する。
The present invention relates to a method for treating sludge.

【0002】[0002]

【従来の技術】従来、汚泥の処理方法としては、ボイラ
ーで加熱して脱水し、粉砕して投棄する方法や、加熱油
中にて油温加熱脱水をして、肥料や建築資材として使用
する等の方法が考えられている。
2. Description of the Related Art Conventionally, sludge is treated by heating in a boiler, dewatering, pulverizing and discarding, or by heating and dehydrating in heated oil to use as fertilizer or building material. And so on.

【0003】[0003]

【発明が解決しようとする課題】しかし、汚泥の単なる
加熱脱水は、公害問題を生起し、完全な脱水が不可能で
あり、燃費も高くつき経済的でなく、また油温脱水方法
では油収納のクッカー中へ原料の搬送を円滑にする必要
があり、種々の問題点が生起し、特に原料として汚泥を
搬送するときに、搬送ラインに汚泥のつまりが生起する
等の欠点があった。
However, mere heating and dehydration of sludge causes a pollution problem, and complete dehydration is impossible, fuel economy is high, and it is not economical. It is necessary to smoothly transport the raw material into the above-mentioned cooker, and various problems occur. In particular, when the sludge is transported as the raw material, there is a drawback such that sludge clogging occurs in the transport line.

【0004】[0004]

【課題を解決するための手段】この発明は、汚泥処理シ
ステムを、汚泥受入ホッパーと、圧送ポンプと、予備処
理タンクと、内部を減圧し加熱油を収容したクッカー
と、ミストキャッチャーと、コンデンサーとより構成
し、しかも汚泥を圧送ポンプにより予備処理タンクへ圧
送する際の潤滑油の機能を果すべく、汚泥受入ホッパー
中の汚泥に媒体油を加油することを特徴とした汚泥処理
方法を提供せんとするものである。
According to the present invention, a sludge treatment system comprises a sludge receiving hopper, a pressure pump, a pretreatment tank, a cooker in which the inside is decompressed and contains heating oil, a mist catcher, and a condenser. A sludge treatment method characterized by adding a medium oil to the sludge in the sludge receiving hopper so as to fulfill the function of lubricating oil when the sludge is pumped to the pretreatment tank by the pump. Is what you do.

【0005】[0005]

【発明の実施の形態】この発明では、まず汚泥受入ホッ
パー中に処理原料となる汚泥を投入する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, first, sludge serving as a processing raw material is charged into a sludge receiving hopper.

【0006】この際に、媒体油を汚泥に加油するが、そ
の量は原料汚泥の重量と同量又は約2分の1の量とす
る。
[0006] At this time, the medium oil is added to the sludge, the amount of which is equal to or about one half of the weight of the raw sludge.

【0007】次いで、圧送ポンプにより予備処理タンク
へ汚泥を媒体油と共に圧送する。
Next, the sludge is pumped together with the medium oil into the pretreatment tank by the pump.

【0008】この際、媒体油が圧送ラインの内壁面に塗
着して汚泥搬送を円滑に行うことができ、粘稠性の汚泥
のつまりを防止できる。
[0008] At this time, the medium oil is applied to the inner wall surface of the pressure feed line so that the sludge can be transported smoothly, and the clogging of the viscous sludge can be prevented.

【0009】予備処理タンクに圧送された汚泥は、媒体
油と共にクッカー中に収納される。クッカーへの収納
は、クッカー中の減圧操作により負圧によって吸引収納
される。クッカー中では、内部減圧をして媒体油と汚泥
とをクッカーのジャケット部から加熱していく。媒体油
が加熱されていき、減圧下での水分の沸点が低くなる。
そして、加熱油と水分の比重が置換して、加熱油によっ
て汚泥組織中に含有された水分が蒸散していく。
The sludge pumped to the pretreatment tank is stored in a cooker together with the medium oil. The storage in the cooker is performed by the negative pressure by the pressure reduction operation in the cooker. In the cooker, the internal pressure is reduced and the medium oil and the sludge are heated from the cooker jacket. As the medium oil is heated, the boiling point of water under reduced pressure decreases.
Then, the specific gravity between the heating oil and the water is replaced, and the water contained in the sludge tissue evaporates by the heating oil.

【0010】蒸散した水分、すなわち蒸気中の粒子は、
ミストキャッチャーで篩にかけられ蒸気のみコンデンサ
ーに送られる。
[0010] The evaporated water, ie the particles in the steam,
It is sieved with a mist catcher and only steam is sent to the condenser.

【0011】コンデンサーでは、水蒸気が凝縮されて液
化し、凝縮水となって取出される。
In the condenser, water vapor is condensed and liquefied, and is taken out as condensed water.

【0012】また、加熱された媒体油、すなわち加熱油
によりクッカー中で加熱された汚泥は、減圧条件下での
加熱処理終了と共に、クッカーからクッカー受けタンク
へ取出される。
Further, the sludge heated in the cooker by the heated medium oil, that is, the heated oil, is taken out of the cooker into the cooker receiving tank together with the completion of the heat treatment under the reduced pressure condition.

【0013】クッカー受けタンクに取出された脱水処理
汚泥は遠心分離機へ搬送されて脱油され、含水分6%〜
20%の粉末状の汚泥原料の製品が生成される。これ
は、油を小量含んでいるためセメント工場等の助燃材や
肥料として有効使用できる。
[0013] The dewatered sludge taken out of the cooker receiving tank is conveyed to a centrifugal separator to be deoiled, and contains 6% or more of water.
A product of 20% powdery sludge raw material is produced. Since it contains a small amount of oil, it can be effectively used as a combustion aid or fertilizer in a cement plant or the like.

【0014】[0014]

【実施例】この発明の実施例を図面にもとづき詳説す
る。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings.

【0015】図1に示すものは、本発明の汚泥処理方法
に使用する処理システムの概略図であり、Aは、汚泥受
入ホッパー、Bは圧送ポンプ、Cは予備処理タンク、D
はクッカー、Eはミストキャッチャー、Fはコンデンサ
ー、Gはクッカー受けタンク、1は、汚泥受入ホッパー
Aと予備処理タンクCからの悪臭を脱臭すべく設けた脱
臭装置、2は、ボイラーでりあり、クッカーDの回転翼
連通路3及びジャケット部4へ加熱蒸気を送り、クッカ
ーD内を加熱するためのものである。5は、加熱蒸気か
らドレン化した凝縮水の返送ライン。6は、コンデンサ
ーFに送られてきた蒸気を冷却してドレン化するための
循環水流路。7は、コンデンサーFの下方よりドレン化
した凝縮水を取出す流路。8は、蒸気をコンデンサーF
に吸入すべく負圧とするための真空ポンプ。9は、乾燥
汚泥をクッカーDより取出しクッカー受けタンクGへ移
送するためのラインを示す。10は、クッカーDに設けた
真空吸引孔を示す。
FIG. 1 is a schematic view of a treatment system used in the sludge treatment method of the present invention, wherein A is a sludge receiving hopper, B is a pressure pump, C is a pretreatment tank, D
Is a cooker; E is a mist catcher; F is a condenser; G is a cooker receiving tank; The heating steam is sent to the rotary blade communication passage 3 and the jacket portion 4 of the cooker D to heat the inside of the cooker D. 5 is a return line for condensed water drained from the heated steam. Reference numeral 6 denotes a circulating water flow path for cooling and draining the steam sent to the condenser F. Reference numeral 7 denotes a flow path for taking out condensed water drained from below the condenser F. 8 is the condenser F
Vacuum pump to create a negative pressure for suction into Reference numeral 9 denotes a line for taking out the dried sludge from the cooker D and transferring it to the cooker receiving tank G. Reference numeral 10 denotes a vacuum suction hole provided in the cooker D.

【0016】この発明の実施例に使用する処理システム
は上記のように構成されており、汚泥を、予め脱水して
含水率80〜85%位にしておき、この予備脱水汚泥を
汚泥受入ホッパーA中に収納する際に、媒体油を汚泥に
対し、重量比で2分の1或は汚泥と同量を加油する。
The treatment system used in the embodiment of the present invention is configured as described above. Sludge is dewatered in advance to a water content of about 80 to 85%, and the preliminarily dewatered sludge is transferred to a sludge receiving hopper A. When stored in the medium, the medium oil is added to the sludge in a weight ratio of 1/2 or the same amount as the sludge.

【0017】このように、汚泥と媒体油が混合された状
態で圧送ポンプBから予備処理タンクCに送られる際
に、媒体油が移送ライン中の内壁に潤滑油として介在
し、圧送を円滑にし、一たん予備処理タンクC中に収納
される。
As described above, when the sludge and the medium oil are mixed and sent from the pressure pump B to the pretreatment tank C, the medium oil is interposed as a lubricating oil on the inner wall of the transfer line, thereby facilitating the pressure feeding. Are stored in the pretreatment tank C once.

【0018】次いで、クッカーD中を減圧することによ
り、予備処理タンクC中の汚泥は媒体油と共にクッカー
D中に吸引されていく。
Next, by reducing the pressure in the cooker D, the sludge in the pretreatment tank C is sucked into the cooker D together with the medium oil.

【0019】クッカーD中では、媒体油と混合された汚
泥が、クッカーDのジャケット部の蒸気により加熱され
て媒体油は加熱油となり、汚泥の油温脱水処理が行われ
る。
In the cooker D, the sludge mixed with the medium oil is heated by the steam in the jacket portion of the cooker D so that the medium oil becomes a heating oil, and the sludge is subjected to oil temperature dehydration.

【0020】なお、クッカーD中の減圧操作は、通常、
初期減圧、中期減圧、後期減圧の三段階減圧を行い、後
期減圧はほぼ真空に近い減圧とする。
The decompression operation in the cooker D is usually
Initial stage depressurization, middle stage depressurization, and late stage decompression are performed, and the latter stage depressurization is a depressurization almost close to vacuum.

【0021】クッカーD中での発生蒸気は、ミストキャ
ッチャーEで粒子の篩選を行い、蒸気のみコンデンサー
Fに至る。
The steam generated in the cooker D is subjected to sieving of particles by a mist catcher E, and only the steam reaches the condenser F.

【0022】コンデンサーFで蒸気はドレン化されて凝
縮水として回収される。
The steam is drained by the condenser F and collected as condensed water.

【0023】この凝縮水は、油温脱水された水分であ
り、悪臭もなく、PPMも許容量以下の量である。
This condensed water is oil-temperature dewatered water, has no bad odor, and has an amount of PPM less than an allowable amount.

【0024】クッカーDで脱水された乾燥汚泥はクッカ
ー受けタンクGに取出されて一応油を抜いた後に、遠心
分離機にかけて含油率6%前後の粉末状製品となるよう
に搾油する。
The dried sludge dewatered in the cooker D is taken out to the cooker receiving tank G to remove oil, and then crushed by a centrifugal separator so as to become a powdery product having an oil content of about 6%.

【0025】搾油した後の製品は、少量ながら油を含有
しているので、助燃材としても使用でき、また各種有機
物を含有していることから肥料としても使用できる。
The product after oiling contains oil in a small amount, so that it can be used as a fuel burner, and because it contains various organic substances, it can be used as fertilizer.

【0026】なお、本発明の実施例で汚泥とは、下水道
処理物から発生する汚泥に限定されることなく、厨芥汚
泥やと殺場から出る動物の内臓、骨、血液等の汚泥や廃
棄魚類等の汚泥や、食品工場から産出する不用の食品か
すや洗浄水等の汚泥や、し尿人糞汚泥等、各種の汚泥を
含み、その種類は限定されない。
In the embodiments of the present invention, the sludge is not limited to sludge generated from sewage treatment products, but it is not limited to sludge from kitchen waste and sludge such as viscera, bones, blood, etc. of animals from slaughterhouses and waste fish. The types of sludge are not limited, such as sludge such as waste sludge, waste sludge from food factories and washing water, and human sludge such as human waste sludge.

【0027】また、上記した方法により汚泥を処理する
ことにより、更に次のような特徴も出る。
Further, by treating sludge by the above-described method, the following features are further obtained.

【0028】すなわち、下水汚泥等の一般汚泥中には塩
分が含まれており、クッカー中において油温脱水を行う
と、油温脱水の過程で原料に含有された塩分は、加熱油
中に流出移行し、脱水汚泥の組織中に塩分が残留せず、
従って、塩分を嫌う肥料として使用することができる。
That is, salt is contained in general sludge such as sewage sludge. When oil temperature dehydration is performed in a cooker, the salt contained in the raw material in the process of oil temperature dehydration flows out into the heating oil. Migrated, no salt remained in the dewatered sludge tissue,
Therefore, it can be used as a fertilizer that dislikes salt.

【0029】しかも、加熱油中に移行した塩分は油を水
洗することにより容易に油から分離することができる。
Further, the salt transferred to the heating oil can be easily separated from the oil by washing the oil with water.

【0030】この原理は、厨芥汚泥を原料とする場合も
同様であり、塩分のみならず硫化ガスも取り除くことが
できるため、厨芥汚泥を油温脱水処理して焼却する場合
も、ゴム焼却炉を痛める硫化ガスの発生がない。当然に
肥料として使用する場合の塩分の弊害も除去できる。
This principle is the same when kitchen sludge is used as a raw material. Since not only salt but also sulfide gas can be removed, a rubber incinerator can be used even when kitchen sludge is subjected to oil temperature dehydration and incinerated. No sulphide gas is generated. Naturally, it can also remove the adverse effects of salt when used as fertilizer.

【0031】油と塩分の分離も水洗により容易に行うこ
とができる。
The separation of oil and salt can be easily performed by washing with water.

【0032】[0032]

【発明の効果】本発明によれば、クッカー中に予め媒体
油を収納しておくのではなく、汚泥原料と共にクッカー
中に投入するために、クッカーに至る中途の搬送ライン
において円滑に汚泥や媒体油の混合原料を送ることがで
き、また、クッカー中に収納される際に媒体油がクッカ
ー内壁面に油を塗着することになるため、クッカーのジ
ャケット部からの加熱の伝熱効率を更に向上できる効果
を有する。
According to the present invention, the medium oil is not stored in the cooker in advance, but is introduced into the cooker together with the sludge raw material. The oil mixture can be sent, and when stored in the cooker, the medium oil will apply oil to the inner wall of the cooker, further improving the heat transfer efficiency of heating from the cooker jacket. Has an effect that can be.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明方法の実施に使用するシステム図。FIG. 1 is a system diagram used for implementing the method of the present invention.

【符号の説明】[Explanation of symbols]

A 汚泥受入ホッパー B 圧送ポンプ C 予備処理タンク D クッカー E ミストキャッチャー F コンデンサー G クッカー受けタンク A Sludge receiving hopper B Pressure pump C Pretreatment tank D Cooker E Mist catcher F Condenser G Cooker receiving tank

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 汚泥処理システムを、汚泥受入ホッパー
と、圧送ポンプと、予備処理タンクと、内部を減圧し加
熱油を収容したクッカーと、ミストキャッチャーと、コ
ンデンサーとより構成し、しかも汚泥を圧送ポンプによ
り予備処理タンクへ圧送する際の潤滑油の機能を果すべ
く、汚泥受入ホッパー中の汚泥に媒体油を加油すること
を特徴とした汚泥処理方法。
1. A sludge treatment system comprising a sludge receiving hopper, a pressure pump, a pretreatment tank, a cooker in which the inside is decompressed and contains heating oil, a mist catcher, and a condenser. A sludge treatment method characterized by adding medium oil to sludge in a sludge receiving hopper so as to fulfill a function of lubricating oil when pumping the sludge into a pretreatment tank by a pump.
JP8245334A 1996-09-17 1996-09-17 Sludge treatment method Pending JPH1085794A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8245334A JPH1085794A (en) 1996-09-17 1996-09-17 Sludge treatment method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8245334A JPH1085794A (en) 1996-09-17 1996-09-17 Sludge treatment method

Publications (1)

Publication Number Publication Date
JPH1085794A true JPH1085794A (en) 1998-04-07

Family

ID=17132127

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8245334A Pending JPH1085794A (en) 1996-09-17 1996-09-17 Sludge treatment method

Country Status (1)

Country Link
JP (1) JPH1085794A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004024939A (en) * 2002-06-21 2004-01-29 Shibuya Machinery Co Ltd Operation method of waste treatment system
JP2004313918A (en) * 2003-04-15 2004-11-11 Daiwa Kagaku Kogyo Kk Vacuum sludge drying method and apparatus therefor
JP2006130370A (en) * 2004-11-02 2006-05-25 Mitsui Eng & Shipbuild Co Ltd Method for cleaning piping in oil-mixed sludge treatment system
CN1304309C (en) * 2005-06-07 2007-03-14 大连理工大学 Process of flowing multistage chemical thermo-dynamic for cleaning mud oil-containing
JP2010023024A (en) * 2008-07-18 2010-02-04 Hanbat National Univ Industry-Academic Cooperation Foundation Vaporizing and drying device of organic sludge immersed in oil

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004024939A (en) * 2002-06-21 2004-01-29 Shibuya Machinery Co Ltd Operation method of waste treatment system
JP2004313918A (en) * 2003-04-15 2004-11-11 Daiwa Kagaku Kogyo Kk Vacuum sludge drying method and apparatus therefor
JP2006130370A (en) * 2004-11-02 2006-05-25 Mitsui Eng & Shipbuild Co Ltd Method for cleaning piping in oil-mixed sludge treatment system
CN1304309C (en) * 2005-06-07 2007-03-14 大连理工大学 Process of flowing multistage chemical thermo-dynamic for cleaning mud oil-containing
JP2010023024A (en) * 2008-07-18 2010-02-04 Hanbat National Univ Industry-Academic Cooperation Foundation Vaporizing and drying device of organic sludge immersed in oil

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