JPS61209099A - Method and apparatus for drying and incinerating sludge - Google Patents

Method and apparatus for drying and incinerating sludge

Info

Publication number
JPS61209099A
JPS61209099A JP60046737A JP4673785A JPS61209099A JP S61209099 A JPS61209099 A JP S61209099A JP 60046737 A JP60046737 A JP 60046737A JP 4673785 A JP4673785 A JP 4673785A JP S61209099 A JPS61209099 A JP S61209099A
Authority
JP
Japan
Prior art keywords
sludge
steam
heat
incinerator
temperature
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
JP60046737A
Other languages
Japanese (ja)
Inventor
Ko Habata
幅田 皎
Masakazu Sawai
正和 沢井
Akira Ishida
章 石田
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.)
Kawasaki Heavy Industries Ltd
Original Assignee
Kawasaki Heavy Industries 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 Kawasaki Heavy Industries Ltd filed Critical Kawasaki Heavy Industries Ltd
Priority to JP60046737A priority Critical patent/JPS61209099A/en
Publication of JPS61209099A publication Critical patent/JPS61209099A/en
Pending legal-status Critical Current

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  • Treatment Of Sludge (AREA)

Abstract

PURPOSE:To enhance a drying speed, by performing the heat exchange of low temp. steam generated from a sludge dryer with the high temp. exhaust gas exhausted from an incinerator. CONSTITUTION:A water-containing sludge cake 4 is thrown in a cage mill 5A and steam is supplied to a heat exchanger 2 at 500-800 deg.C. Sludge and steam reaching a separator 6 are separated by centrifugal action and the sludge is thrown in a fluidized bed incinerator 1. Steam is introduced into the heat exchanger 2 through a steam recirculation path 9 to be heat-exchanged with the high temp. exhaust gas of the incinerator 1. The exhaust gas is about 800 deg.C and heats steam during the flow through the heat transfer pipe of the heat exchanger 2 and the heating medium supplied to a sludge dryer 5 is converted to heated steam of about 500 deg.C. By this method, heat recovery becomes easy and drying speed is enhanced.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は汚泥の乾燥・焼却方法および装置に関し、詳し
くは、高温低圧蒸気を汚泥に直接接触させるようにした
乾燥・焼却処理に関する。これは、下水処理場などの汚
泥を熱効率よく焼却処理する分野で利用されるものであ
る。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for drying and incinerating sludge, and more particularly, to a drying and incineration process in which high-temperature, low-pressure steam is brought into direct contact with sludge. This is used in fields such as sewage treatment plants where sludge is incinerated with high thermal efficiency.

〔従来技術〕[Prior art]

下水処理において生じる汚泥は、廃棄のための減容また
は土木資材などへの再利用を図るために、乾燥後に焼却
処理される。そのために従来から熱消費の少ない汚泥処
理システムが検討され、最近では、汚泥を焼却した後の
排ガスの熱エネルギを蒸気で回収し、その蒸気で汚泥ケ
ーキを予め乾燥させることが行なわれている。
Sludge generated during sewage treatment is incinerated after drying in order to reduce its volume for disposal or reuse it as civil engineering materials. For this reason, sludge treatment systems with low heat consumption have been studied, and recently, the thermal energy of the exhaust gas after incinerating the sludge has been recovered as steam, and the sludge cake has been pre-dried with the steam.

その代表的な例として第2図に示すような、例えば多段
回転式焼却炉21を備えた処理装置がある。これは、汚
泥を上段から下段に順次移行させながら焼却する際に発
生する焼却炉排ガスを排ガスボイラ22に導入し、その
熱により蒸発した熱媒を汚泥乾燥機23に供給するよう
になっている。
As a typical example, there is a processing apparatus equipped with a multi-stage rotary incinerator 21 as shown in FIG. This is designed to introduce the incinerator exhaust gas generated when incinerating the sludge from the upper stage to the lower stage into the exhaust gas boiler 22, and supply the heat medium evaporated by the heat to the sludge dryer 23. .

その汚泥乾燥機は間接加熱式であり、その中に投入され
た汚泥ケーキ24は伝熱面を通して熱媒蒸気で加熱され
、焼却炉21で焼却するに好適な水分となるまで乾燥さ
れる。汚泥乾燥機23で降温した熱媒蒸気は凝縮され、
排ガスボイラ22で再度高温高圧蒸気とされる。一方、
乾燥機23で発生した汚泥からの水蒸気を除去する必要
があるので、乾燥tM23には除湿塔25が付設されて
いる。
The sludge dryer is of an indirect heating type, and the sludge cake 24 put therein is heated by heat medium vapor through a heat transfer surface and dried until the moisture becomes suitable for incineration in the incinerator 21. The heat medium vapor whose temperature has been lowered in the sludge dryer 23 is condensed,
The exhaust gas boiler 22 converts it into high-temperature, high-pressure steam again. on the other hand,
Since it is necessary to remove water vapor from the sludge generated in the dryer 23, a dehumidification tower 25 is attached to the dryer tM23.

なお、乾燥機23内での水蒸気の発生を助長するために
、その蒸気分圧を下げると共に水蒸気を運び出すキャリ
アガス26が供給される。汚泥の乾燥工程においては臭
気が発生するので、水蒸気を含んで除湿塔25に導出さ
れるキャリアガスは、汚泥乾燥機23に循環されるよう
になっている。
Note that in order to promote the generation of water vapor within the dryer 23, a carrier gas 26 is supplied that lowers the partial pressure of the vapor and carries out the water vapor. Since odor is generated in the sludge drying process, the carrier gas containing water vapor and led out to the dehumidification tower 25 is circulated to the sludge dryer 23.

ちなみに、上述した多段回転式焼却炉21から排出され
る排ガス温度は300〜400℃程度であり、乾燥用の
熱媒蒸気を得るためには上述したように排ガスボイラを
使用せざるを得ない。したがって、得られる熱媒蒸気は
10Kg/c++1で200℃程度の高圧高温蒸気とな
る。
Incidentally, the temperature of the exhaust gas discharged from the multistage rotary incinerator 21 described above is about 300 to 400°C, and in order to obtain heat medium vapor for drying, it is necessary to use the exhaust gas boiler as described above. Therefore, the heat medium vapor obtained becomes high pressure and high temperature steam of about 200° C. at 10 kg/c++1.

このような汚泥処理装置においては、設備面から見ると
、汚泥乾燥機で増湿されたキャリアガスを除湿する除湿
塔が必要であること、熱回収のために高圧容器であるボ
イラを使用しなければならないこと、それに伴うボイラ
技師を必要とすること、などの問題がある。一方、熱消
費の面からみると、汚泥乾燥機のキャリアガスが乾燥機
内の熱エネルギの一部を持ち出し、除湿塔で放熱してし
まうこと、乾燥機に供給される熱媒が上述した程度の温
度の高圧蒸気であるので、伝熱速度が遅く汚泥乾燥機に
おける伝熱面を大きくしなければ、熱効率を向上させる
ことができないなどの問題がある。
From an equipment perspective, such sludge treatment equipment requires a dehumidification tower to dehumidify the carrier gas humidified by the sludge dryer, and a boiler, which is a high-pressure vessel, must be used for heat recovery. There are problems such as the need for a boiler engineer and the associated need for a boiler engineer. On the other hand, from the perspective of heat consumption, the carrier gas of the sludge dryer takes out a part of the thermal energy inside the dryer and dissipates it in the dehumidification tower, and the heat medium supplied to the dryer is Since it is high-temperature and high-pressure steam, there are problems in that the heat transfer rate is slow and the thermal efficiency cannot be improved unless the heat transfer surface in the sludge dryer is enlarged.

〔発明の目的〕[Purpose of the invention]

本発明は上述の問題に鑑みてなされたもので、その目的
は、汚泥の乾燥・焼却に必要な主たる装置の簡素化や小
型化、汚泥乾燥速度の向上や熱消費の低減および熱回収
率の向上、さらには、特殊技能者の配備の不要化を図る
ことができる汚泥の乾燥・焼却方法および装置を提供す
ることである。
The present invention was made in view of the above-mentioned problems, and its objectives are to simplify and downsize the main equipment necessary for drying and incinerating sludge, to improve the sludge drying speed, to reduce heat consumption, and to improve the heat recovery rate. It is an object of the present invention to provide a method and apparatus for drying and incinerating sludge, which can improve the performance of the sludge and further eliminate the need for the deployment of special technicians.

〔発明の構成〕[Structure of the invention]

本発明の特徴とするところを第1図を参照して説明する
と、第1の発明にあっては、汚泥乾燥機5から発生する
低温水蒸気と焼却炉1から排出される高温排ガスとを熱
交換させ、得られた高温加熱水蒸気を直接汚泥に接触さ
せ、乾燥された汚泥を焼却するようにした汚泥の乾燥・
焼却方法である。
The features of the present invention will be explained with reference to FIG. 1. In the first invention, the low temperature steam generated from the sludge dryer 5 and the high temperature exhaust gas discharged from the incinerator 1 are heat exchanged. The sludge drying process involves directly contacting the resulting high-temperature heated steam to the sludge and incinerating the dried sludge.
This is an incineration method.

また、第2の発明にあっては、高温加熱水蒸気で汚泥を
乾燥すると共に解砕する直接熱交換式の汚泥乾燥機5と
、その汚泥乾燥機で発生した低温水蒸気と乾燥汚泥とを
分離する分離器6と、分離された乾燥汚泥を焼却する焼
却炉1と、焼却炉排ガスと分離器6からの低温水蒸気を
熱交換させ、汚泥乾燥ff15に供給する高温加熱水蒸
気を発生させる熱交換器2とを具備した汚泥の乾燥・焼
却装置としたことである。
The second invention also includes a direct heat exchange type sludge dryer 5 that dries and crushes sludge with high-temperature heated steam, and separates the low-temperature steam generated in the sludge dryer from the dried sludge. A separator 6, an incinerator 1 that incinerates the separated dried sludge, and a heat exchanger 2 that exchanges heat between incinerator exhaust gas and low-temperature steam from the separator 6 to generate high-temperature heated steam to be supplied to the sludge dryer ff15. This is a sludge drying and incineration device equipped with the following:

〔実施例〕〔Example〕

以下に、本発明をその実施例に基づいて詳細に説明する
The present invention will be described in detail below based on examples thereof.

第1図は本発明の汚泥の乾燥・焼却方法を実施するに好
適な汚泥の乾燥・焼却処理装置の全体系統図で、乾燥汚
泥を焼却するために焼却炉lが採用されている。その焼
却炉は詳細には図示しないが例えば流動層炉で、多段回
転式焼却炉では得られない高温の焼却温度とすることが
できるものである。その焼却炉排ガス温度は800℃に
もなるので、排ガスからの熱回収においては排ガスボイ
ラを使用するまでもなく、低圧の熱交換器2を採用する
ことができる。この熱交換器は、多管式またはプレート
式の間接熱交換器であって、大気圧に近い圧力状態でし
かもガス・ガス熱交換で、汚泥を乾燥させるための低圧
の熱媒である高温加熱水蒸気を得ることができるもので
ある。なお、熱交換器2から排出される焼却炉排ガスに
はかなりの熱が残存しているので、それを利用して焼却
炉1の燃焼空気を予熱する空気予熱器3が設けられてい
る。
FIG. 1 is an overall system diagram of a sludge drying/incineration treatment apparatus suitable for carrying out the sludge drying/incineration method of the present invention, in which an incinerator 1 is employed to incinerate the dried sludge. Although the incinerator is not shown in detail, it is, for example, a fluidized bed furnace, which can achieve a high incineration temperature that cannot be obtained with a multi-stage rotary incinerator. Since the temperature of the incinerator exhaust gas is as high as 800° C., a low-pressure heat exchanger 2 can be used to recover heat from the exhaust gas without using an exhaust gas boiler. This heat exchanger is a shell-and-tube or plate-type indirect heat exchanger, and is a gas-to-gas heat exchanger that uses high-temperature heating using a low-pressure heat medium to dry sludge. It is possible to obtain water vapor. Note that since a considerable amount of heat remains in the incinerator exhaust gas discharged from the heat exchanger 2, an air preheater 3 is provided to preheat the combustion air of the incinerator 1 using this residual heat.

上述した焼却炉1の前段には、高温加熱水蒸気で汚泥ケ
ーキ4を乾燥すると共に解砕する直接熱交換式の汚泥乾
燥機5が設置されている。この乾燥機は例えば気流式乾
燥機であり、円筒かごが回転する公知のケージミル5A
と、乾燥汚泥を気流搬送しながら乾燥を助長する気流筒
5Bとからなっている。なお、乾燥機として、汚泥ケー
キを乾燥しまた解砕する機能を備えていれば、他の形式
の乾燥機であっても差し支えなく、要は、熱交換器2か
らの高温低圧蒸気を汚泥に直接接触させることができる
ようになっているものであればよい。
A direct heat exchange type sludge dryer 5 is installed upstream of the incinerator 1 described above, which dries and crushes the sludge cake 4 using high-temperature heated steam. This dryer is, for example, a flash dryer, and is a known cage mill 5A in which a cylindrical cage rotates.
and an airflow cylinder 5B that promotes drying while transporting the dried sludge with airflow. Note that any other type of dryer may be used as long as it has the function of drying and crushing the sludge cake. Any material that can be brought into direct contact may be used.

このような汚泥乾燥機5と焼却炉1との間の経路には、
汚泥乾燥機内で発生した低温水蒸気と乾燥汚泥とを分離
する分離器6が設けられている。
The route between the sludge dryer 5 and the incinerator 1 includes
A separator 6 is provided to separate low-temperature steam generated within the sludge dryer and dried sludge.

この分離器は例えば号イクロンなどであり、分離された
汚泥を直ちに焼却炉1に導入する一方、汚泥から発生し
た水蒸気を熱媒である蒸気と共に循環ファン7により誘
引して、熱交換器2に導入できるようになっている。な
お、分離器6から排出される熱媒温度を検出する温度検
出器8が蒸気循環路9に設けられ、その排出蒸気温度に
よっては熱交換器2に戻される蒸気量を調整できるよう
に、蒸気量制御弁10が熱交換器2の上流側に設置され
ている。
This separator is, for example, an Ikron model, and while the separated sludge is immediately introduced into the incinerator 1, the water vapor generated from the sludge is drawn together with steam as a heat medium by a circulation fan 7, and then transferred to a heat exchanger 2. It is ready for implementation. Note that a temperature detector 8 for detecting the temperature of the heat medium discharged from the separator 6 is provided in the steam circulation path 9, and a temperature detector 8 is provided in the steam circulation path 9 to detect the temperature of the heat medium discharged from the separator 6. A quantity control valve 10 is installed upstream of the heat exchanger 2.

ところで、上述した汚泥ケーキ4を乾燥した後熱交換器
2に循環される蒸気は、常にガス状態にある。しかし、
汚泥乾燥機5では次々と水蒸気が汚泥より発生するので
、そのガス圧が上昇する。
By the way, the steam that is circulated to the heat exchanger 2 after drying the sludge cake 4 described above is always in a gas state. but,
In the sludge dryer 5, water vapor is generated from the sludge one after another, so the gas pressure increases.

汚泥乾燥機5における圧力を所定値に保持する必要があ
ることから、循環蒸気の一部を取り出し、それを凝縮さ
せる凝縮器11が設置されている。
Since it is necessary to maintain the pressure in the sludge dryer 5 at a predetermined value, a condenser 11 is installed to take out a part of the circulating steam and condense it.

本例においては乾燥機5の気流筒5Bに圧力検出器12
が設けられ、その信号により開閉したり開度が調整され
る蒸気圧制御弁13が凝縮器11の上流側に設けられて
いる。凝縮器には冷却水14が供給され、凝縮した水は
排出され、除湿された残留ガスは焼却炉1に投入されて
最終的には焼却炉排ガスと混合され、空気予熱器3から
放出されるようになっている。
In this example, a pressure detector 12 is installed in the air flow cylinder 5B of the dryer 5.
A steam pressure control valve 13 is provided upstream of the condenser 11, and the steam pressure control valve 13 is opened/closed or its opening degree is adjusted based on the signal. Cooling water 14 is supplied to the condenser, the condensed water is discharged, and the dehumidified residual gas is input to the incinerator 1, where it is finally mixed with the incinerator exhaust gas and discharged from the air preheater 3. It looks like this.

なお、上述した蒸気循環路9における循環ファン7の上
流には、開閉弁15を有する管路16が枝設され、処理
装置の運転の開始や停止時に蒸気循環路9内をパージす
ることができるようになっている。
Note that a pipe 16 having an on-off valve 15 is installed upstream of the circulation fan 7 in the steam circulation path 9 described above, and the inside of the steam circulation path 9 can be purged when starting or stopping the operation of the processing equipment. It looks like this.

このような構成の汚泥の乾燥・焼却処理装置においては
、以下のようにして効率よく汚泥を処理することができ
る。
In the sludge drying/incineration treatment apparatus having such a configuration, sludge can be efficiently treated as follows.

例えば80%程度の含水率の汚泥ケーキ4が、ケージミ
ル5Aに投入され、熱交換器2からは熱媒である500
〜800℃のほぼ大気圧の水蒸気が供給される。図示し
ないが三重構造の円筒かごのうち固定された中間のかご
を除いて内側と外側のかごが回転されると、内側かご内
の汚泥が遠心力で放射状に移動して順次外方のかごを通
過する。その際に汚泥は解砕され、乾燥機5内に供給さ
れている高温加熱水蒸気と直接接触して、汚泥ケーキは
乾燥される。熱媒蒸気は低圧であるから、汚泥と直接接
触させても、そのための特別な配慮を乾燥機5に施して
おく必要はなく、蒸気と汚泥中の水分との熱交換も極め
て効率よく迅速に行なわれる。
For example, a sludge cake 4 with a water content of about 80% is fed into a cage mill 5A, and a heat medium of 500% is fed from a heat exchanger 2.
Water vapor at approximately atmospheric pressure at ~800°C is supplied. Although not shown in the figure, when the inner and outer cages of the triple-layered cylindrical cage are rotated except for the fixed middle cage, the sludge in the inner cage moves radially by centrifugal force and sequentially moves to the outer cage. pass. At this time, the sludge is crushed, and the sludge cake is dried by direct contact with the high-temperature heated steam supplied into the dryer 5. Since the heat medium steam is at low pressure, there is no need to take any special precautions in the dryer 5 even if it comes into direct contact with the sludge, and heat exchange between the steam and the water in the sludge is extremely efficient and rapid. It is done.

しかも、汚泥は各かごを移動する間に撹拌されるので、
汚泥が局部的に加熱されたり、表面だけの乾燥に偏るこ
とはない。ある程度乾燥された汚泥は蒸気と共に気流筒
5B内を気流搬送され、所望の例えば30%程度の含水
率になるまで乾燥される。
Moreover, since the sludge is agitated while moving between each basket,
The sludge is not heated locally or dried only on the surface. The sludge that has been dried to a certain extent is air-flow-transported along with steam through the air flow tube 5B, and is dried until it reaches a desired moisture content of, for example, about 30%.

なお、汚泥乾燥機5内で汚泥から蒸発した水蒸気が多く
なると、蒸気分圧が上昇して乾燥機5内における蒸発が
阻害される。そのために、気流筒5B内の圧力が所定圧
以上になると、圧力検出器I2からの信号によって過剰
な量の蒸気が凝縮器11に導入され、そこを流過する冷
却水14で凝縮される。
Note that when the amount of water vapor evaporated from the sludge in the sludge dryer 5 increases, the steam partial pressure increases and evaporation in the dryer 5 is inhibited. Therefore, when the pressure inside the gas flow cylinder 5B becomes equal to or higher than a predetermined pressure, an excessive amount of steam is introduced into the condenser 11 by a signal from the pressure detector I2, and is condensed by the cooling water 14 flowing therethrough.

分離器6に到達した汚泥と蒸気は遠心作用により分離さ
れ、汚泥は流動層焼却炉1に投入される。
The sludge and steam that have reached the separator 6 are separated by centrifugal action, and the sludge is fed into the fluidized bed incinerator 1.

一方、蒸気は蒸気循環路9を介して熱交換器2に導入さ
れ、焼却炉1の高温排ガスと熱交換される。
On the other hand, the steam is introduced into the heat exchanger 2 via the steam circulation path 9 and is heat exchanged with the high-temperature exhaust gas of the incinerator 1.

焼却炉は流動層式であるので、その排ガスは約800℃
と高い。その排ガスは熱交換器2の伝熱管内を流過する
間に蒸気を加熱し、汚泥乾燥機5に供給される熱媒を5
00℃程度の高温加熱水蒸気とする。このような熱交換
は排ガス温度が高いことから、ガス・ガス熱交換による
熱回収が極めて容易となり、熱交換器として排ガスボイ
ラのような高圧容器を使用することなく、安価なプレー
ト式などの熱交換器で十分となる。その結果、排熱回収
部における保守が容易になると共にボイラ技師も不要に
なる。なお、熱交換器2からの排ガスの残存熱エネルギ
は、空気予熱器3を流過する燃焼空気でもって熱回収さ
れ、その熱は流動層内に持ち込まれる。
Since the incinerator is a fluidized bed type, the exhaust gas is approximately 800℃.
That's high. The exhaust gas heats the steam while passing through the heat exchanger tube of the heat exchanger 2, and converts the heat medium supplied to the sludge dryer 5 into 5.
The steam is heated to a high temperature of about 00°C. Since the exhaust gas temperature is high in this type of heat exchange, it is extremely easy to recover heat through gas-to-gas heat exchange, and instead of using a high-pressure vessel like an exhaust gas boiler as a heat exchanger, an inexpensive plate-type heat exchanger can be used. An exchanger is sufficient. As a result, maintenance in the waste heat recovery section becomes easier and no boiler engineer is required. Note that the residual thermal energy of the exhaust gas from the heat exchanger 2 is recovered by the combustion air flowing through the air preheater 3, and the heat is carried into the fluidized bed.

ところで、分離器6から熱交換器2に導入される低温水
蒸気の温度が高くなると、温度検出器8からの信号を受
けて熱交換器2に導入される蒸気量が絞られる。これは
、温度の高い蒸気を熱交換器で加熱すると、さらに高温
になった水蒸気で汚泥を乾燥させ過ぎることになるのを
防止するためである。その結果、焼却炉1に供給される
汚泥は焼却に好適な含水率に維持され、安定した燃焼が
流動層内で確保される。
By the way, when the temperature of the low-temperature steam introduced into the heat exchanger 2 from the separator 6 increases, the amount of steam introduced into the heat exchanger 2 is reduced in response to a signal from the temperature detector 8. This is to prevent the sludge from being excessively dried by the even higher temperature steam when heated by the heat exchanger. As a result, the sludge supplied to the incinerator 1 is maintained at a moisture content suitable for incineration, and stable combustion is ensured within the fluidized bed.

なお、蒸気循環路9内は蒸気のみが循環するようになっ
ているが、運転を停止したときには温度が低下して、蒸
気が蒸気循環路9内で凝縮してしまう。凝縮による蒸気
循環路9の真空化を防止するため、開閉弁15が開口さ
れて空気と置き換えるられる。一方、運転を再開する場
合には、熱交換器2で発生した蒸気量に応じて開閉弁1
5より空気を放出し、蒸気循環路9内が蒸気のみになる
ように操作される。
Although only steam circulates in the steam circulation path 9, when the operation is stopped, the temperature drops and the steam condenses in the steam circulation path 9. In order to prevent the steam circulation path 9 from becoming evacuated due to condensation, the on-off valve 15 is opened to replace the steam with air. On the other hand, when restarting operation, the on-off valve 1
Air is discharged from 5, and the steam circulation path 9 is operated so that only steam is present in the steam circulation path 9.

以上の説明において、焼却炉として流動層焼却炉を例に
して述べたが、そのような形式の炉に限らず、ガス・ガ
ス熱交換の可能な程度の温度の排ガスを排出するような
焼却炉であれば、他の形式の炉を採用することもできる
In the above explanation, a fluidized bed incinerator was used as an example of an incinerator, but the incinerator is not limited to that type of incinerator. If so, other types of furnaces may be used.

〔発明の効果〕〔Effect of the invention〕

本発明は以上の実施例の詳細な説明から判るように、汚
泥乾燥機から発生する低温水蒸気と焼却炉から排出され
る高温排ガスとを熱交換させ、得られた高温加熱水蒸気
を直接汚泥に接触させ、乾燥された汚泥を焼却するよう
にしたので、以下のような種々の効果を発揮する。まず
、設備面においては、焼却炉からは極めて高温の排ガス
が排出されるので、排熱の回収に排ガスボイラを使用す
ることなく、耐圧性の低い極めて安価なガス・ガス熱交
換器を採用することができる。汚泥乾燥機においては直
接接触式となるので、乾燥速度が高くなり乾燥のための
構造が単純化・小型化され、さらには汚泥から発生した
蒸気のみを別途除去する必要がないので、除湿塔が不要
となる。
As can be seen from the detailed description of the embodiments above, the present invention exchanges heat between low-temperature steam generated from a sludge dryer and high-temperature exhaust gas discharged from an incinerator, and the resulting high-temperature heated steam is brought into direct contact with sludge. By incinerating the dried sludge, the following effects can be achieved. First, in terms of equipment, since extremely high-temperature exhaust gas is emitted from the incinerator, an extremely inexpensive gas-to-gas heat exchanger with low pressure resistance will be used instead of using an exhaust gas boiler to recover the exhaust heat. be able to. Since the sludge dryer is a direct contact type, the drying speed is high and the drying structure is simpler and smaller.Furthermore, there is no need to separately remove only the steam generated from the sludge, so a dehumidification tower is not required. No longer needed.

一方、熱回収の面では、汚泥乾燥機で蒸発した蒸気を運
びだすと共に蒸気分圧を調整するキャリアガスが不要と
なり、キャリアガスが持ち出す熱の損失を無くすことが
できる。また、乾燥のための熱媒蒸気の温度が高い上に
乾燥機内では汚泥と直接接触するので、乾燥速度が高く
熱媒蒸気と汚泥中の水分との熱交換率が著しく向上する
On the other hand, in terms of heat recovery, there is no need for a carrier gas to carry out the vapor evaporated in the sludge dryer and to adjust the partial pressure of the vapor, thereby eliminating the loss of heat carried out by the carrier gas. Furthermore, since the temperature of the heating medium vapor for drying is high and it comes into direct contact with the sludge in the dryer, the drying rate is high and the heat exchange rate between the heating medium vapor and the water in the sludge is significantly improved.

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

第1図は本発明の汚泥の乾燥・焼却方法を実施するため
に好適な装置の一例を示す全体系統図、第2図は従来の
汚泥の乾燥・焼却処理装置の系統図である。 1・−・焼却炉、2・−・熱交換器、5−汚泥乾燥機、
6−分離器。。
FIG. 1 is an overall system diagram showing an example of an apparatus suitable for implementing the sludge drying/incineration method of the present invention, and FIG. 2 is a system diagram of a conventional sludge drying/incineration treatment apparatus. 1--Incinerator, 2--Heat exchanger, 5-Sludge dryer,
6-Separator. .

Claims (2)

【特許請求の範囲】[Claims] (1)汚泥乾燥機から発生する低温水蒸気と焼却炉から
排出される高温排ガスとを熱交換させ、得られた高温加
熱水蒸気を直接汚泥に接触させ、乾燥された汚泥を焼却
することを特徴とする汚泥の乾燥・焼却方法。
(1) The feature is that the low-temperature steam generated from the sludge dryer and the high-temperature exhaust gas discharged from the incinerator are heat exchanged, the resulting high-temperature heated steam is brought into direct contact with the sludge, and the dried sludge is incinerated. A method for drying and incinerating sludge.
(2)高温加熱水蒸気で汚泥を乾燥すると共に解砕する
直接熱交換式の汚泥乾燥機と、その汚泥乾燥機で発生し
た低温水蒸気と乾燥汚泥とを分離する分離器と、分離さ
れた乾燥汚泥を焼却する焼却炉と、焼却炉排ガスと前記
分離器からの低温水蒸気を熱交換させ、前記汚泥乾燥機
に供給する高温加熱水蒸気を発生させる熱交換器とを具
備したことを特徴とする汚泥の乾燥・焼却装置。
(2) A direct heat exchange type sludge dryer that dries and crushes sludge using high-temperature heated steam, a separator that separates the dry sludge from the low-temperature steam generated in the sludge dryer, and the separated dried sludge. and a heat exchanger that exchanges heat between incinerator exhaust gas and low-temperature steam from the separator to generate high-temperature heated steam to be supplied to the sludge dryer. Drying/incineration equipment.
JP60046737A 1985-03-09 1985-03-09 Method and apparatus for drying and incinerating sludge Pending JPS61209099A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60046737A JPS61209099A (en) 1985-03-09 1985-03-09 Method and apparatus for drying and incinerating sludge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60046737A JPS61209099A (en) 1985-03-09 1985-03-09 Method and apparatus for drying and incinerating sludge

Publications (1)

Publication Number Publication Date
JPS61209099A true JPS61209099A (en) 1986-09-17

Family

ID=12755640

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60046737A Pending JPS61209099A (en) 1985-03-09 1985-03-09 Method and apparatus for drying and incinerating sludge

Country Status (1)

Country Link
JP (1) JPS61209099A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63231111A (en) * 1987-03-09 1988-09-27 郭 ▲聰▼賢 Waste incinerating method
CN100364907C (en) * 2006-04-04 2008-01-30 浙江大学 Sludge drying system using combination of smoke residual heat and two external heat supply sources
JP2009154100A (en) * 2007-12-27 2009-07-16 Taiheiyo Cement Corp System and method for drying water-containing organic waste
JP2009281723A (en) * 2009-07-15 2009-12-03 Tsukishima Kikai Co Ltd Water-containing object combustion treatment facility and its method
CN102180578A (en) * 2011-03-21 2011-09-14 深圳市极水实业有限公司 Sludge drying and incinerating system, sludge drying machine and sludge drying method
JP2011189290A (en) * 2010-03-15 2011-09-29 Toshiba Corp Sludge drying method
JP2012183514A (en) * 2011-03-08 2012-09-27 Metawater Co Ltd Method for transferring dehydrated cake
WO2023026370A1 (en) * 2021-08-24 2023-03-02 月島機械株式会社 Sludge incineration system and sludge incineration method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58136973A (en) * 1982-02-08 1983-08-15 荏原インフイルコ株式会社 Method of treating substance containing moisture
JPS59166300A (en) * 1983-03-10 1984-09-19 Kubota Ltd Drying and incinerating device for sludge

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58136973A (en) * 1982-02-08 1983-08-15 荏原インフイルコ株式会社 Method of treating substance containing moisture
JPS59166300A (en) * 1983-03-10 1984-09-19 Kubota Ltd Drying and incinerating device for sludge

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63231111A (en) * 1987-03-09 1988-09-27 郭 ▲聰▼賢 Waste incinerating method
CN100364907C (en) * 2006-04-04 2008-01-30 浙江大学 Sludge drying system using combination of smoke residual heat and two external heat supply sources
JP2009154100A (en) * 2007-12-27 2009-07-16 Taiheiyo Cement Corp System and method for drying water-containing organic waste
JP2009281723A (en) * 2009-07-15 2009-12-03 Tsukishima Kikai Co Ltd Water-containing object combustion treatment facility and its method
JP2011189290A (en) * 2010-03-15 2011-09-29 Toshiba Corp Sludge drying method
JP2012183514A (en) * 2011-03-08 2012-09-27 Metawater Co Ltd Method for transferring dehydrated cake
CN102180578A (en) * 2011-03-21 2011-09-14 深圳市极水实业有限公司 Sludge drying and incinerating system, sludge drying machine and sludge drying method
WO2023026370A1 (en) * 2021-08-24 2023-03-02 月島機械株式会社 Sludge incineration system and sludge incineration method

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