JPS60220200A - Treatment of organic sludge - Google Patents

Treatment of organic sludge

Info

Publication number
JPS60220200A
JPS60220200A JP59075004A JP7500484A JPS60220200A JP S60220200 A JPS60220200 A JP S60220200A JP 59075004 A JP59075004 A JP 59075004A JP 7500484 A JP7500484 A JP 7500484A JP S60220200 A JPS60220200 A JP S60220200A
Authority
JP
Japan
Prior art keywords
dehydrated
dried
excretion
dryer
drying
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
Application number
JP59075004A
Other languages
Japanese (ja)
Other versions
JPH0218158B2 (en
Inventor
Katsuyuki Kataoka
克之 片岡
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.)
Ebara Corp
Original Assignee
Ebara Infilco Co Ltd
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 Ebara Infilco Co Ltd filed Critical Ebara Infilco Co Ltd
Priority to JP59075004A priority Critical patent/JPS60220200A/en
Publication of JPS60220200A publication Critical patent/JPS60220200A/en
Publication of JPH0218158B2 publication Critical patent/JPH0218158B2/ja
Granted legal-status Critical Current

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  • Gasification And Melting Of Waste (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Sludge (AREA)

Abstract

PURPOSE:To enable energy conserving treatment, by preparatorily drying the dehydrated cake of org. sludge by utilizing heat at the time of incineration and mixing dehydrated excretion in the dried cake while passing air emitted from an aeration blower through the resulting mixture to dry the same. CONSTITUTION:Excessive sludge 1 generated from a biological treatment process of excretion receives the addition of a cationic polymer and dehydrated to be converted to a dehydrated cake with water content of 80%. This dehydrated cake is guided to a preparatory dryer 4 to be converted to a preparatorily dried substance with water content on the order of 50%. The excretion residue 6 removed and recovered from sewage is dehydrated mechanically to obtain a dehydrated excretion residue 8 which is, in turn, mixed with the preparatorily dried substance 5 while the resulting mixture is received in an aeration dryer 9 and air 11 emitted from an aeration blower 10 used in the biological treatment process of excretion is blown into said mixture to convert the same to a dried product 13 with water content of 10-20%. This product 13 is incinerated or thermally decomposed by an incinerator 14 and the generated heat is supplied to the heat source of the preparatory dryer 4.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、し尿、下水その他の有機性汚水の処理に伴っ
て発生する有機性汚泥の省エネルギ的t【処理方法に関
するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an energy-saving method for treating organic sludge generated during the treatment of human waste, sewage, and other organic wastewater.

〔従来技術〕[Prior art]

従来、し尿、下水その他の有機性汚水の処理において発
生する有機性汚泥は、カチオンポリマなどの各種脱水助
剤が添加され1機械脱水されているが、脱水ケーキの含
水率はまだ高く、特に難脱水性の汚泥の場合には脱水ケ
ーキの含水率が80%台と高いことが多い。したかつて
、このような脱水ケーキは、そのままでは処分が困難で
あるために、乾燥、焼却される例が多い。しかしながら
Conventionally, organic sludge generated in the treatment of human waste, sewage, and other organic sewage has been dewatered mechanically with the addition of various dehydration aids such as cationic polymers, but the moisture content of the dehydrated cake is still high, making it particularly difficult. In the case of dewaterable sludge, the moisture content of the dehydrated cake is often as high as 80%. In the past, such dehydrated cakes were difficult to dispose of as they were, so they were often dried and incinerated. however.

その乾燥、焼却に際しては多量の有価燃料を必要とし、
エネルギ節約の立場から大きな問題となっている。
Drying and incineration require a large amount of valuable fuel.
This is a big problem from the standpoint of energy conservation.

〔発明が解決しようとする問題点」 本発明は、有機性汚水処理に伴って不可避的に発生する
有機性汚泥の脱水ケーキを乾燥、焼却するにあたり、従
来全く利用されることがなかった有機性汚水中に含まれ
る紙類、毛髪などのし渣を最大限に有効利用し、さらに
重油などの有価燃料を不要とし、処理系内でのエネルギ
を自己充足し得るきわめて省エネルギ的な処理方法を提
供するものである。
[Problems to be Solved by the Invention] The present invention aims at drying and incinerating the dehydrated cake of organic sludge that is inevitably generated in the treatment of organic sewage. We are developing an extremely energy-saving treatment method that makes the most effective use of paper, hair, and other residues contained in wastewater, eliminates the need for valuable fuels such as heavy oil, and is self-sufficient in energy within the treatment system. This is what we provide.

〔問題点を解決するだめの手段〕[Failure to solve the problem]

本発明は、有機性汚水処理において発生した有機性汚泥
の脱水ケーキを予備乾燥したのち、前記有機性汚水処理
において回収したし渣を混合し、該混合物に前記有機性
汚水処理に使用される曝気ブロワの吐出空気を通気して
乾燥し、得られた乾燥物の少なくとも一部を焼却又は熱
分解し、その生成熱を前記脱水ケーキの予備乾燥に利用
することを特徴とするものである、 〔実施例〕 本発明の一実施例をし尿処理への適用を例にとって図面
を参照しながら説明すると、し尿の生物処理工程(図示
せず)から発生した余剰汚泥1は。
In the present invention, after pre-drying a dehydrated cake of organic sludge generated in organic sewage treatment, the sludge collected in the organic sewage treatment is mixed, and the mixture is aerated to be used in the organic sewage treatment. It is characterized by drying by blowing air discharged from a blower, incinerating or thermally decomposing at least a part of the obtained dried product, and using the generated heat for pre-drying the dehydrated cake. Embodiment] An embodiment of the present invention will be described with reference to the drawings, taking as an example the application of the present invention to human waste treatment.Excess sludge 1 generated from a human waste biological treatment process (not shown) is.

カチオンポリマなどが添加されたのち、例えばベルトプ
レス脱水機2で脱水され、含水率80〜85チ程度の脱
水ケーキ6となり、この脱水ケーキ6は予備乾燥器4に
導かれて含水率50チ台にまで予備乾燥され、予備乾燥
物5となる。一方、し尿処理施設の前処理工程のスクリ
ーン(図示せず)によって除渣1回収されたし渣6は1
例えばスクリュープレス脱水機7によって脱水され、含
水率60〜65%の脱水し渣8となる。
After the cationic polymer and the like are added, it is dehydrated using, for example, a belt press dehydrator 2 to form a dehydrated cake 6 with a water content of about 80 to 85 cm.This dehydrated cake 6 is led to a pre-dryer 4 and has a water content of about 50 cm. The pre-dried product 5 is obtained by pre-drying until the pre-dried product 5 is obtained. On the other hand, sludge 1 is collected by the screen (not shown) in the pretreatment process of the human waste treatment facility, and sludge 6 is 1
For example, it is dehydrated by a screw press dehydrator 7, resulting in a dehydrated residue 8 having a water content of 60 to 65%.

次に、前記余剰汚泥1の予備乾燥物5と脱水し渣80両
者は混合されて通気乾燥器9に収容され。
Next, the pre-dried material 5 of the excess sludge 1 and the dehydrated residue 80 are mixed and stored in the ventilation dryer 9.

し尿の生物処理工程に曝気用空気を供給する曝気ブロワ
10の吐出空気11が吹き込まれて、混合物12は通気
乾燥される。曝気ブロワ10の吐出空気11は、断熱圧
縮熱によって70℃程度の温度を示すから、通気乾燥器
9内の予備乾燥物5と脱水し渣8の混合物12は効果的
(乾燥され、含水率10〜20%程度の乾燥製品16と
なる。
The discharge air 11 of the aeration blower 10 that supplies aeration air to the biological treatment process of human waste is blown into the mixture 12, and the mixture 12 is dried through ventilation. Since the discharged air 11 of the aeration blower 10 exhibits a temperature of about 70° C. due to the heat of adiabatic compression, the mixture 12 of the pre-dried material 5 and the dehydrated residue 8 in the aeration dryer 9 is effectively (dried and has a moisture content of 10 The dry product 16 is about ~20%.

通気乾燥器9にて予備乾燥物5と脱水し渣8の混合物1
2を曝気ブロワ10の吐出空気11によって通気乾燥す
るには、図示のような縦長の充填層を形成させるのが効
果的である。すなわち、予備乾燥物5は繊維分が主成分
である脱水し渣8と混合されて充填層を形成するから、
被乾燥物相互の付着、ゆ着がなく、良好な通気性が確保
され。
Mixture 1 of pre-dried material 5 and dehydrated residue 8 in ventilation dryer 9
2 is air-dried by the discharged air 11 of the aeration blower 10, it is effective to form a vertically elongated packed bed as shown in the figure. That is, since the pre-dried material 5 is mixed with the dehydrated residue 8 whose main component is fiber to form a packed layer,
There is no adhesion or stagnation of the items to be dried, and good ventilation is ensured.

また充填層厚を高(しても圧密することが少なく。Also, even if the packed bed thickness is high, there is little consolidation.

充填層の下部で、被乾燥物相互のゆ着がないという重要
な効果がある。
This has the important effect of preventing the materials to be dried from sticking to each other in the lower part of the packed bed.

この結果、曝気ブロワ10の吐出空気11&被乾燥物と
の接触時間を長くとることができ、効率的な乾燥を行う
ことができる。
As a result, the contact time between the discharge air 11 of the aeration blower 10 and the object to be dried can be increased, and efficient drying can be performed.

なお、曝気ブロワ10の吐出空気11のように。Note that, like the discharge air 11 of the aeration blower 10.

100℃以下の温度をもつにすぎない低温度差エネルギ
によって効果的な乾燥を行うには、前述したように通気
乾燥器9にインプットされる被乾燥物の物性を調整する
こと、および層厚の厚い充填層を形成させるということ
が重要である。
In order to perform effective drying using low temperature difference energy having a temperature of only 100°C or less, it is necessary to adjust the physical properties of the material to be dried input to the ventilation dryer 9 as described above, and to adjust the layer thickness. It is important to form a thick packed layer.

このようにして、通気乾燥器9において含水率10〜2
0%に乾燥され自然可能となった乾燥製品16の一部又
は全量を、焼却炉(又は熱分解炉)14に供給して焼却
又は熱分解し、その生成熱15(熱分解によって得られ
るオイル、ガス、チャーを燃焼する場合の生成熱を含む
)を予備乾燥器4の乾燥熱源として供給する。このよう
にして各乾燥に必要な熱源を自己充足させることができ
、系外から重油などの燃料の供給は全く不要になる。
In this way, the moisture content is 10 to 2 in the ventilation dryer 9.
A part or the entire amount of the dried product 16 that has been dried to 0% and becomes natural is supplied to the incinerator (or pyrolysis furnace) 14 and incinerated or pyrolyzed, and the generated heat 15 (oil obtained by pyrolysis) is , gas, and heat generated when char is combusted) is supplied as a drying heat source to the pre-dryer 4. In this way, the heat source necessary for each drying process can be self-sufficient, and there is no need to supply fuel such as heavy oil from outside the system.

図中、16は焼却炉(又は熱分解炉)14への燃焼用空
気、17は残渣で、18は予備乾燥器4から流出する乾
燥排ガスであり、19は通気乾燥器9から流出する曝気
用空気であって、図示しないし尿の生物処理工程の曝気
槽に供給される。
In the figure, 16 is the combustion air to the incinerator (or pyrolysis furnace) 14, 17 is the residue, 18 is the dry exhaust gas flowing out from the pre-dryer 4, and 19 is the aeration air flowing out from the ventilation dryer 9. Air is supplied to an aeration tank (not shown) in a biological treatment process for human waste.

さらに、予備乾燥器4として、本発明を実施するうえで
最も好適な乾燥機の型式は、造粒と乾燥を同時に行5造
粒乾燥機である。すなわち1本発明の脱水ケーキ6の予
備乾燥物5が粒状であると、通気乾燥器9においてきわ
めて通気性のよい充填層を形成できるから、曝気ブロワ
10の吐出空気11による通気乾燥がきわめて効果的に
行われ。
Further, as the preliminary dryer 4, the most suitable type of dryer for carrying out the present invention is a five-row granulation dryer that simultaneously performs granulation and drying. That is, if the pre-dried product 5 of the dehydrated cake 6 of the present invention is granular, it is possible to form a packed bed with extremely good air permeability in the ventilation dryer 9, so that ventilation drying by the discharge air 11 of the aeration blower 10 is extremely effective. It was done on.

また脱水ケーキ6の解砕工程も不要になるからである。This is also because the step of crushing the dehydrated cake 6 becomes unnecessary.

〔発明の効果〕〔Effect of the invention〕

以上述べたように本発明によれば1次のような重要なる
効果がある。
As described above, the present invention has the following important effects.

■ 有機性汚泥の乾燥工程を2段に分割したので、含水
率80%以上の高含水率の脱水ケーキに対し【も合理的
、省エネルギ的に乾燥、焼却又は熱分解処理することが
できる。
■ Since the organic sludge drying process is divided into two stages, dehydrated cakes with a high water content of 80% or more can be dried, incinerated or thermally decomposed in a rational and energy-saving manner.

(リ 汚水から除去回収したし渣を機械脱水して得た脱
水し渣を予備乾燥した脱水ケーキに混合し。
(Li) The residue obtained by mechanically dehydrating the residue removed and collected from the waste water is mixed with the pre-dried dehydrated cake.

曝気ブロワの吐出空気で通気乾燥するので1通気乾燥時
に層厚の長い充填層を形成しても、被乾燥物のゆ着、圧
密がなく、良好な通気条件を確保することができ、熱容
量としては大きなものとはいえない曝気ブロワの吐出空
気の保有熱量を効率よく回収することができる。
Since ventilation drying is performed using the air discharged from the aeration blower, even if a long packed layer is formed during one ventilation drying, there is no settling or compaction of the material to be dried, and good ventilation conditions can be ensured. The amount of heat retained in the air discharged from the aeration blower, which cannot be said to be large, can be efficiently recovered.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明の一実施例を示す系統説明図である。 1・・・余剰汚泥、2・・・ベルトプレス脱水機、6・
・・脱水ケーキ、4・・・予備乾燥器、5・・・予備乾
燥物、6・・・し渣、7・・・スクリュープレス脱水機
。 8・・・脱水し渣、9・・・通気乾燥器、10・・・曝
気ブロワ、11・・・吐出空気、12・・・混合物、1
6・・・乾燥製品、14・・・焼却炉、15・・・生成
熱、16・・・燃焼用空気、17・・・残液、18・・
・乾燥排ガス。 19・・・曝気用空気。 特許出願人 荏原インフィルコ株式会社代理人弁理士 
高 木 正 行
The drawing is a system explanatory diagram showing an embodiment of the present invention. 1... Surplus sludge, 2... Belt press dehydrator, 6.
... Dehydrated cake, 4... Pre-dryer, 5... Pre-dried product, 6... Residue, 7... Screw press dehydrator. 8... Dehydrated residue, 9... Ventilation dryer, 10... Aeration blower, 11... Discharged air, 12... Mixture, 1
6...Dried product, 14...Incinerator, 15...Generation heat, 16...Combustion air, 17...Residual liquid, 18...
・Dry exhaust gas. 19... Air for aeration. Patent applicant: Patent attorney representing Ebara Infilco Co., Ltd.
Masayuki Takagi

Claims (1)

【特許請求の範囲】 1 有機性汚水処理において発生した有機性汚泥の脱水
ケーキを予備乾燥したのち、前記有機性汚水処理にお(
・て回収したし渣を゛混合し、該混合物に前記有機性汚
水処理に使用される曝気ブロワの吐出空気を通気して乾
燥し、得られた乾燥物の少なくとも一部を焼却又は熱分
解し、その生成熱を前記脱水ケーキの予備乾燥に利用す
ることを特徴とする有機性汚泥の処理方法。 2 前記予備乾燥を造粒と乾燥を同時に行う造粒乾燥た
らしめたものである特許請求の範囲第1項記載の有機性
汚泥の処理方法。 3 前記混合物の通気乾燥に際し、前記混合物の充填層
を形成するものである特許請求の範囲第1項又は第2項
記載の有機性汚泥の処理方法。
[Claims] 1. After pre-drying the dehydrated cake of organic sludge generated in the organic sewage treatment,
・Mix the collected residue, dry the mixture by aerating the discharge air of the aeration blower used for the organic sewage treatment, and incinerate or thermally decompose at least a part of the obtained dried product. A method for treating organic sludge, characterized in that the generated heat is used for preliminary drying of the dehydrated cake. 2. The method for treating organic sludge according to claim 1, wherein the preliminary drying is granulation drying in which granulation and drying are performed simultaneously. 3. The organic sludge treatment method according to claim 1 or 2, wherein a packed bed of the mixture is formed when the mixture is aerated and dried.
JP59075004A 1984-04-16 1984-04-16 Treatment of organic sludge Granted JPS60220200A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59075004A JPS60220200A (en) 1984-04-16 1984-04-16 Treatment of organic sludge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59075004A JPS60220200A (en) 1984-04-16 1984-04-16 Treatment of organic sludge

Publications (2)

Publication Number Publication Date
JPS60220200A true JPS60220200A (en) 1985-11-02
JPH0218158B2 JPH0218158B2 (en) 1990-04-24

Family

ID=13563615

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59075004A Granted JPS60220200A (en) 1984-04-16 1984-04-16 Treatment of organic sludge

Country Status (1)

Country Link
JP (1) JPS60220200A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110040936A (en) * 2019-02-28 2019-07-23 南京泓远环保科技有限公司 A kind of oil-bearing sludge treatment equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110040936A (en) * 2019-02-28 2019-07-23 南京泓远环保科技有限公司 A kind of oil-bearing sludge treatment equipment

Also Published As

Publication number Publication date
JPH0218158B2 (en) 1990-04-24

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