JPS6075399A - Drying and incinerating method of dehydrated sludge - Google Patents
Drying and incinerating method of dehydrated sludgeInfo
- Publication number
- JPS6075399A JPS6075399A JP58183548A JP18354883A JPS6075399A JP S6075399 A JPS6075399 A JP S6075399A JP 58183548 A JP58183548 A JP 58183548A JP 18354883 A JP18354883 A JP 18354883A JP S6075399 A JPS6075399 A JP S6075399A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- fluidized bed
- drying
- dehydrated sludge
- fluidized
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Sludge (AREA)
- Glanulating (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
Description
【発明の詳細な説明】
従来、脱水汚泥を乾燥焼却するには、一般に、脱水汚泥
を造粒機で造粒し、これを無砂式流動層乾燥機で乾燥し
たのち、無砂式流動層焼却炉で焼月１する方式が採用さ
れている。[Detailed Description of the Invention] Conventionally, in order to dry and incinerate dehydrated sludge, the dehydrated sludge is generally granulated in a granulator, dried in a sandless fluidized bed dryer, and then granulated in a sandless fluidized bed dryer. A method is adopted in which the waste is burned in an incinerator.
しかしながら、造粒機は高速回転で駆動する必要があり
、そのため回転翼やケーシングの寿命が短いとともに、
所要動力が大きく消費ミノ〕が大きいという欠点がある
。However, the granulator needs to be driven at high speed, which shortens the lifespan of the rotor blades and casing.
The drawback is that it requires a large amount of power and consumes a large amount of energy.
また、このようにして造粒された脱水汚泥は水分が多（
て重いため、流動層乾燥機の流動気体の噴出圧力を大と
づる必要上、消費電力の大なる大能力の流動ブロワを必
要とするという欠点を有していた。In addition, the dehydrated sludge granulated in this way has a high water content (
Since the fluidized bed dryer is heavy, it is necessary to increase the jetting pressure of the fluidized gas from the fluidized bed dryer, and it has the disadvantage that it requires a fluidized blower with high power consumption and high capacity.
本発明は、前記従来法の欠点を除去りるために種々検討
の結果、乾燥しながら造粒を行えば、造粒機の回転を低
速としても容易に造粒することができるという点に着目
してなされたもので、脱水汚泥を焼却炉で発生した熱を
利用した予備乾燥造粒機により造粒するとともに、予備
乾燥して無砂式流動層乾燥機に供給す′るようにして前
記欠点を除去した脱水汚泥の乾燥焼却法を提供しようと
するものである。As a result of various studies to eliminate the drawbacks of the conventional method, the present invention focuses on the fact that if granulation is performed while drying, granulation can be easily performed even if the rotation speed of the granulator is low. The dehydrated sludge is granulated by a pre-drying granulator that utilizes heat generated in an incinerator, and the pre-dried sludge is supplied to a sandless fluidized bed dryer. The present invention aims to provide a method for drying and incinerating dehydrated sludge that eliminates drawbacks.
次に、本発明を添付図面に従って説明づる。Next, the present invention will be explained with reference to the accompanying drawings.
図面ば本発明の乾燥焼却法の概略を示し、大略、予備乾
燥造粒機１と流動層乾燥機２および流動層焼却炉３とか
らなる。前記予備乾燥造粒機１は−端に投入口５を、Ｊ
、た他端に排出口６を備えｌζケーシング４内に、多数
の回転翼８を右する回転軸７を備えた構成からなる。ま
た前記回転軸７は中空構造どなっているとともに、回転
翼８も中空構）責どなっており、各回転翼８の内部と回
転軸の内部とは連通している。The drawings schematically show the drying and incineration method of the present invention, which generally includes a pre-drying granulator 1, a fluidized bed dryer 2, and a fluidized bed incinerator 3. The pre-drying granulator 1 has an input port 5 at the negative end, and a J
, and has a discharge port 6 at the other end, and a rotary shaft 7 on which a large number of rotary blades 8 are mounted inside a casing 4 . The rotary shaft 7 has a hollow structure, and the rotor blades 8 also have a hollow structure, and the inside of each rotor blade 8 and the inside of the rotary shaft are in communication.
前記流動層乾燥機２は上方に前記排出口６と対向りる投
入口１１を、上方に乾燥粒状物を排出ＪるｊＪＩ出口１
２を備えたクーラング１０内に熱交換器１４を備えた構
成からなる。そして、図示しない流動気体がケーシング
１０の下方部から噴出し、投入口１１から投入された粒
状汚泥を流動させ流動層１３を形成するにうになってい
る。The fluidized bed dryer 2 has an input port 11 facing the discharge port 6 upwardly, and an outlet 1 for discharging dry granules upwardly.
The heat exchanger 14 is provided in a coolant 10 having a heat exchanger 14. Fluidized gas (not shown) is ejected from the lower part of the casing 10 to fluidize the granular sludge introduced from the inlet 11 to form a fluidized bed 13.
前記流動層炉２ＪＩ炉３は流動層乾燥機２と大略同一構
成からなり、前記排出口１２から排出された乾燥汚泥を
投入する投入口１７と焼Ｍｌされた焼却灰を排出Ｊる１
ノ１出ロ１８とを備えるとともに熱交換器２０をイｊし
、ケーシング１６の下部から噴出する流動気体により粒
状汚泥を流動しつつ焼却覆る流動層１９を形成リ−るよ
うになっている。そして、前記熱交換器１４と２０とは
図示しないボイラを介して配管１５で互いに連通ずると
ともに、ボイラによって生じた蒸気の一部は、配管１５
から前記予（ｉ＾乾燥造粒機１の中空回転軸７を介して
各回転翼８内を循環し再度前記配管１５に戻るようにな
っている。尚、９はふるいである。The fluidized bed furnace 2JI furnace 3 has approximately the same configuration as the fluidized bed dryer 2, and includes an input port 17 for inputting the dried sludge discharged from the discharge port 12, and a discharge port 1 for discharging the incinerated ash.
A heat exchanger 20 is provided, and a fluidized bed 19 is formed in which the granular sludge is fluidized and incinerated by fluidized gas ejected from the lower part of the casing 16. The heat exchangers 14 and 20 communicate with each other via a piping 15 via a boiler (not shown), and a portion of the steam generated by the boiler is transferred to the piping 15.
From there, the precipitate is circulated through each of the rotary blades 8 via the hollow rotary shaft 7 of the drying granulator 1 and returns to the pipe 15 again. Note that 9 is a sieve.
従って、脱水汚泥は投入口５から予備乾燥造粒機１のケ
ーシング４内に投入され、図示しない駆動機により回転
する回転軸７によりその回転翼８で温合撹拌するとども
に乾燥し、造粒されることになる。このようにして造粒
された）ｌｊ泥は、排出口６からふるい９を経て所定粒
径範囲内のものが投入口１１から流動層乾燥機２内に投
入される。一方、ふるいにより選別された小粒径および
大粒径の造粒汚泥は返送汚泥として再度投入口５から予
備乾燥造粒機１のケーシング４内に投入されることにな
る。流動層乾燥機２内に投入された予備乾燥した粒状汚
泥は流動気体により流動し、その間に流動層焼却炉３で
発生した熱を熱源とする蒸気により加熱乾燥され、やが
て排出口１２から投入口１７を経て流動層焼却炉３内に
投入される。この投入された乾燥粒状物は流動層１９で
前記流動層乾燥機に揖フると同様流動するとともに焼却
さｔし、その焼却１火はｉＪｌ出口１８から排出される
ことになる。Therefore, dehydrated sludge is introduced into the casing 4 of the pre-drying granulator 1 from the input port 5, heated and stirred by the rotary blades 8 of the rotary shaft 7 rotated by a drive machine (not shown), dried and granulated. will be done. The lj mud granulated in this manner passes through a sieve 9 from an outlet 6, and those within a predetermined particle size range are fed into a fluidized bed dryer 2 from an inlet 11. On the other hand, the granulated sludge of small particle size and large particle size that have been sorted by the sieve are fed back into the casing 4 of the pre-drying granulator 1 through the input port 5 as return sludge. The pre-dried granular sludge charged into the fluidized bed dryer 2 is fluidized by the fluidized gas, during which time it is heated and dried by steam using the heat generated in the fluidized bed incinerator 3 as a heat source, and is eventually transferred from the discharge port 12 to the input port. 17, and then put into the fluidized bed incinerator 3. The charged dry granules are fluidized in the fluidized bed 19 in the same way as they are in the fluidized bed dryer and are incinerated, and the incinerated fire is discharged from the iJl outlet 18.
尚、前記流動＠１９で乾燥汚泥が焼却される際に発生す
る熱は、熱交換器２０により回収され、これを熱源とし
て前記ボイラで蒸気を発生させるものである。また場合
にＪ−っては配管１５からの蒸気にまって前記流動気体
を加熱するようにしてもよｌ、）。The heat generated when the dried sludge is incinerated in the flow @ 19 is recovered by the heat exchanger 20, and is used as a heat source to generate steam in the boiler. In some cases, the flowing gas may be heated by being soaked in steam from the pipe 15).
さらに、予備乾燥造粒＋；ｌ！１のケーシング自体をも
加熱し予備加熱を更に向上させるよう【こしてもよいこ
とは勿論である。Furthermore, pre-dried granulation +;l! Of course, the casing of No. 1 may also be heated and strained to further improve the preheating.
以上の説明で明ｒうかなように、本発明に係る脱水汚泥
の乾燥焼Ｊ、ＩＩ法によれば、１１；２水汚泥を流動層
乾燥機２に投入りる前に、予備乾燥造粒機で乾燥造粒り
るため、汚泥はその水分が軽減されており、流動層乾燥
機にａ５りる流動気体の噴出圧力を従来のしのより低く
でき、かつ、流動気体の風聞も少なくでき、そのため流
動ブロワは小型で消費電力の小さなもので済み、省電力
化を図ることができる。また、前記予備乾燥造粒機１の
乾燥用熱源（よ流動層焼却炉で発生した熱を利用するた
め安価である。さらに、この予備乾燥造粒機の運転は低
速回転で行うため、消費電力が小さいととしに騒音を発
生することがなく、しかも回転翼やケーシングの摩耗が
少なく寿命を長くすることができるという利点を有する
ものである。As is clear from the above explanation, according to the drying method J and II of dehydrated sludge according to the present invention, 11; Because the sludge is dried and granulated in a drying machine, its water content is reduced, and the ejection pressure of the fluidized gas in the fluidized bed dryer can be lower than that of conventional methods, and the noise of the fluidized gas can also be reduced. Therefore, the flow blower can be small and consume little power, which can save power. In addition, since the drying heat source of the pre-drying granulator 1 (heat generated in the fluidized bed incinerator) is used, it is inexpensive.Furthermore, since the pre-drying granulator is operated at a low speed, it consumes less power. If the noise is small, it does not generate noise, and has the advantage that the rotor blades and casing have little wear and can have a long life.
第１図は本発明に係る脱水汚泥の乾燥焼Ｎｊ法を示づ゛
概略図である。
１・・・予備乾燥造粒機、２・・・流動層乾燥機、３・
・・流ｖＪ層焼却炉、４・・・ケーシング、５・・・投
入口、６・・・排出口、７・・・回転軸（中空）、８・
・・回１ｉ７． ＠、９・・・ふるい、１０・・・ケー
シング、１１・・・投入［ｌ、１２・・・＋Ｊｌ出口、
１３・・・流動層、１４・・・熱交換器、１５・・・配
管、１Ｇ・・・ケーシング、１７・・・投入口、１８・
・・排出［ｌ、１９・・・流動層、２０・・・熱交換器
、２１・・・分岐管。
特許出願人 中外炉工業株式会社FIG. 1 is a schematic diagram showing the drying and burning Nj method for dewatered sludge according to the present invention. 1... Pre-drying granulator, 2... Fluidized bed dryer, 3...
...Flow VJ layer incinerator, 4...Casing, 5...Inlet, 6...Outlet, 7...Rotating shaft (hollow), 8...
...Time 1i7. @, 9...Sieve, 10...Casing, 11...Input [l, 12...+Jl outlet,
13... Fluidized bed, 14... Heat exchanger, 15... Piping, 1G... Casing, 17... Inlet, 18...
...Discharge [l, 19... Fluidized bed, 20... Heat exchanger, 21... Branch pipe. Patent applicant Chugai Roko Kogyo Co., Ltd.
Claims (2)
無砂式流動層焼却炉で焼却する脱水汚泥の゛乾燥焼却法
において、前記乾燥機での乾燥工程の前処理どして脱水
汚泥を前記焼却炉の発生熱を利用した予備乾燥造粒機で
乾燥造粒することを特徴とする脱水汚泥の乾燥焼却法。(1) After drying the dehydrated sludge in a sandless fluidized bed dryer,
In the dry incineration method for dehydrated sludge that is incinerated in a sandless fluidized bed incinerator, the dehydrated sludge is pretreated in the drying process in the dryer and then processed in a pre-drying granulator that utilizes the heat generated by the incinerator. A method for drying and incinerating dehydrated sludge, which is characterized by drying and granulating it.
潜記を返送することを特徴とする特許請求の範囲第１項
記載の脱水汚泥の乾燥焼却法。(2) The method for drying and incinerating dehydrated sludge according to claim 1, characterized in that pre-drying particles outside a predetermined particle size range are returned to the pre-drying granulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58183548A JPS6075399A (en) | 1983-09-30 | 1983-09-30 | Drying and incinerating method of dehydrated sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58183548A JPS6075399A (en) | 1983-09-30 | 1983-09-30 | Drying and incinerating method of dehydrated sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6075399A true JPS6075399A (en) | 1985-04-27 |
Family
ID=16137731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58183548A Pending JPS6075399A (en) | 1983-09-30 | 1983-09-30 | Drying and incinerating method of dehydrated sludge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6075399A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61272698A (en) * | 1985-05-29 | 1986-12-02 | 株式会社日立製作所 | Dry granulation processor for waste liquor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5621700A (en) * | 1979-05-28 | 1981-02-28 | Escher Wyss Ag | Method of treating deposited sludge |
-
1983
- 1983-09-30 JP JP58183548A patent/JPS6075399A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5621700A (en) * | 1979-05-28 | 1981-02-28 | Escher Wyss Ag | Method of treating deposited sludge |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61272698A (en) * | 1985-05-29 | 1986-12-02 | 株式会社日立製作所 | Dry granulation processor for waste liquor |
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