JPH0299110A - Method for recovering separated matters of cyclone - Google Patents
Method for recovering separated matters of cycloneInfo
- Publication number
- JPH0299110A JPH0299110A JP63251160A JP25116088A JPH0299110A JP H0299110 A JPH0299110 A JP H0299110A JP 63251160 A JP63251160 A JP 63251160A JP 25116088 A JP25116088 A JP 25116088A JP H0299110 A JPH0299110 A JP H0299110A
- Authority
- JP
- Japan
- Prior art keywords
- cyclone
- dust
- dryer
- separated
- steam
- 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
Links
- 238000000034 method Methods 0.000 title claims description 13
- 239000000428 dust Substances 0.000 claims abstract description 57
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 description 6
- 239000010802 sludge Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000010801 sewage sludge Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
この発明は、ｔη泥の脱水ケーキなどの被乾燥物の乾燥
に使用される熱風直接乾燥機の排ガス中からダストを回
収するためのサイクロン分離物の回収方法に関するもの
である。Detailed Description of the Invention "Field of Industrial Application" This invention is directed to a cyclone separation method for recovering dust from the exhaust gas of a hot air direct dryer used for drying materials to be dried such as a dehydrated cake of tη mud. It concerns methods of collecting things.
「従来の技術」
従来、先のような熱風直接乾燥機における排ガス中のダ
ストを分離回収する方法としては、乾燥機から排出され
た排ガスをサイクロンに導入し、排ガス中に同伴される
微粉末（ダスト）を分離回収する方法が行なわれている
。``Prior art'' Conventionally, as a method for separating and recovering dust in the exhaust gas in a hot air direct dryer as mentioned above, the exhaust gas discharged from the dryer is introduced into a cyclone, and the fine powder ( A method is being used to separate and collect dust).
この際、サイクロンで分離回収されたダストはロータリ
ーバルブ等で直接抜き出し、機械的に移送され、一方、
サイクロンより排出されたガスは、熱交換器に送られて
加熱され、再び乾燥機に送られて循環使用される。At this time, the dust separated and collected by the cyclone is directly extracted using a rotary valve, etc., and transferred mechanically.
The gas discharged from the cyclone is sent to a heat exchanger to be heated, and then sent to the dryer again for circulation.
「発明が解決しようとする課題」
しかしながら、サイクロンで分離回収されたダストをロ
ータリーバルブ等で抜き出す場合には、機械的な摩耗対
策やダスト、特にそれが下水汚泥ダストのように繊維分
を含む場合には、その閉塞対策等を要する。そこで例え
ばダストをサイクロン内の加熱ガスとともに抜き出して
、乾燥機内に返送することにより、このような問題に対
処することができるが、この場合は返送されたダストが
再び乾燥機から排出されてサイクロンに循環してしまう
ために、サイクロンの負荷が増加し、排ガスのダクトや
熱交換器等にダストが付着してしまう問題があることが
わかった。``Problem to be solved by the invention'' However, when extracting the dust separated and collected by a cyclone using a rotary valve, etc., it is necessary to take mechanical measures against wear and tear, especially when the dust contains fibers such as sewage sludge dust. Therefore, it is necessary to take measures to prevent the blockage. For example, this problem can be solved by extracting the dust together with the heated gas in the cyclone and returning it to the dryer, but in this case, the returned dust is discharged from the dryer again and returned to the cyclone. It was found that due to the circulation, the load on the cyclone increases and there is a problem in that dust adheres to exhaust gas ducts, heat exchangers, etc.
本発明は、上記事情に鑑みてなされたもので、機械的操
作が不要であり、プロセスの簡略化が可能であり、また
ダストによる閉塞や循環熱媒中へのダスト飛散を防止す
ることのできるサイクロン分離物の回収方法を提供する
ことを目的としている。The present invention has been made in view of the above circumstances, and does not require mechanical operations, making it possible to simplify the process, and preventing clogging due to dust and scattering of dust into the circulating heat medium. The purpose is to provide a method for recovering cyclone separated products.
「課題を解決するための手段」
上記目的達成のために、本発明では、熱風直接乾燥機に
おける排ガス中のダストをサイクロンで分離回収する方
法であって、乾燥機の排ガスを第１のサイクロン内に導
入し、この第１のサイクロンで分離されたダストを熱媒
とともに抜き出して第２のサイクロンに供給し、第２の
サイクロンで分離されたダストを上記乾燥機の含水率の
高い被乾燥物に直接接触させて捕捉させることを特徴と
するサイクロン分離物の回収方法である。"Means for Solving the Problems" In order to achieve the above object, the present invention provides a method for separating and collecting dust in the exhaust gas in a hot air direct dryer using a cyclone, in which the exhaust gas from the dryer is collected in a first cyclone. The dust separated by the first cyclone is extracted together with the heat medium and supplied to the second cyclone, and the dust separated by the second cyclone is transferred to the drying material having a high moisture content in the dryer. This is a method for collecting cyclone separated substances, which is characterized by direct contact and capture.
「作用 」
第１のサイクロンで分離されたダストを熱媒とともに抜
き出すことにより、ダストによる閉塞を防止することが
できる。また、このダストを第２のサイクロンに供給し
、第２のサイクロンで分離されたダストを上記乾燥機の
含水率の高い被乾燥物に直接接触させて捕捉させること
により、排ガス中のダストは高率で乾燥機内の被乾燥物
中に捕捉回収され、第２のサイクロンから排出されたガ
ス中に残存するダストを極めて少なくすることができる
。"Operation" By extracting the dust separated by the first cyclone together with the heat medium, blockage due to dust can be prevented. In addition, by supplying this dust to a second cyclone and making the dust separated by the second cyclone come into direct contact with the drying material with a high moisture content in the dryer and capture it, the dust in the exhaust gas can be reduced to a high level. It is possible to extremely reduce the amount of dust that is captured and recovered in the material to be dried in the dryer at a high rate and remains in the gas discharged from the second cyclone.
「実施例」
第１図は、本発明方法の一実施例を説明するためのもの
であって、この例では本発明方法を下水汚泥の燃焼焼却
または溶融処理装置における乾燥機からのダスト回収に
適用させた例を示すものである。``Example'' Figure 1 is for explaining an example of the method of the present invention. This is an example of application.
この図中符号ｌは多段乾燥機である。この多段乾燥機ｌ
は、脱水ケーキ貯留槽２から送られた下水汚泥の脱水ケ
ーキ３を上段側から下段側に向けて撹拌しながら移送し
、同時に高温の加熱蒸気を導入して脱水ケーキ３に接触
させて加熱乾燥を行うようになっている。この多段乾燥
機ｌで乾燥された乾燥汚泥は、乾燥汚泥貯留槽（図示せ
ず）に送られ、例えば焼却炉４に送られる。この乾燥汚
泥は焼却炉４で燃焼され、焼却灰５となって焼却炉４か
ら取り出される。この焼却炉４の高温排ガスは、蒸気加
熱器６に送られ、多段乾燥機１から排出された蒸気を加
熱した後、排ガス処理設備に送られる。この蒸気加熱器
６は、焼却炉４から送られた排ガスの熱によって循環蒸
気を加熱し、再び多段乾燥機ｌに供給するようになって
いる。The symbol l in this figure is a multi-stage dryer. This multi-stage dryer
The dehydrated cake 3 of sewage sludge sent from the dehydrated cake storage tank 2 is transferred from the upper side to the lower side while stirring, and at the same time, high-temperature heated steam is introduced and brought into contact with the dehydrated cake 3 to heat and dry it. It is designed to do this. The dried sludge dried in the multi-stage dryer 1 is sent to a dry sludge storage tank (not shown), and then to an incinerator 4, for example. This dried sludge is burned in the incinerator 4 and turned into incinerated ash 5, which is taken out from the incinerator 4. The high-temperature exhaust gas from the incinerator 4 is sent to a steam heater 6, which heats the steam discharged from the multistage dryer 1, and then sent to an exhaust gas treatment facility. This steam heater 6 heats the circulating steam using the heat of the exhaust gas sent from the incinerator 4 and supplies it again to the multistage dryer 1.
上記多段乾燥機１から排出された蒸気は、ライン７を通
って第１のサイクロン８に送られる。この第１のサイク
ロン８では、多段乾燥機Ｉから排出された蒸気中に同伴
されたダストを分離し、ダストを含まない蒸気として蒸
気加熱器６に返送するようになっている。このダストは
、乾燥汚泥の微粉末からなり、微細な繊維分などの軽く
て飛散し易い物質を含むものである。第１のサイクロン
８で分離されたダストは、第１のサイクロン８内の一部
の蒸気とともにサイクロン吸引ファン９によって取り出
され、第２のサイクロンＩＯに送られる。Steam discharged from the multi-stage dryer 1 is sent to the first cyclone 8 through line 7. This first cyclone 8 separates dust entrained in the steam discharged from the multi-stage dryer I, and returns the dust-free steam to the steam heater 6. This dust is composed of fine powder of dried sludge, and contains light and easily scattered substances such as fine fibers. The dust separated by the first cyclone 8 is taken out by a cyclone suction fan 9 together with some steam in the first cyclone 8 and sent to the second cyclone IO.
この第２のサイクロンＩＯでは、第１のサイクロン８か
ら送られた蒸気中のダスト分を分離し、このダストを多
段乾燥機１内に導入して、多段乾燥機ｌ内の含水率の高
い脱水ケーキ３に直接接触させて、脱水ケーキ３に付着
させることによって捕捉させるようになっている。This second cyclone IO separates the dust from the steam sent from the first cyclone 8, introduces this dust into the multi-stage dryer 1, and dehydrates the high moisture content in the multi-stage dryer 1. The dehydrated cake 3 is made to come into direct contact with the dehydrated cake 3 and thereby be captured.
第２のサイクロン１４で分離されたダストは、前述のよ
うに多段乾燥機ｌ内の脱水ケーキ３に付着され、一方、
第２のサイクロンＩＯから排出された蒸気は、第１のサ
イクロン８から排出されろ蒸気とともに、蒸気加熱器６
に送られる。The dust separated by the second cyclone 14 is attached to the dehydrated cake 3 in the multi-stage dryer 1 as described above, while
The steam discharged from the second cyclone IO, together with the steam discharged from the first cyclone 8, is transferred to the steam heater 6.
sent to.
この例では、多段乾燥機１から排出された蒸気を第１の
サイクロン８に導入し、該蒸気中のダストを分離し、こ
れを蒸気とともに連続的に吸引して抜き出すので、抜き
出し部におけろ蒸気の凝縮及びそれにとらなうダストの
付着、閉塞を防止することかできる。更にこのダスト分
を蒸気とともに第２のサイクロンｌＯに送り、この第２
のサイクロン１０で分離されたダストを多段乾燥機１内
の含水率の高い脱水ケーキに直接接触させることによっ
て、ダストを高率で捕捉することができ、循環蒸気中の
ダスト飛散を防止することができる。In this example, the steam discharged from the multistage dryer 1 is introduced into the first cyclone 8, the dust in the steam is separated, and this is continuously sucked and extracted together with the steam, so that the It is possible to prevent steam condensation and the resulting dust adhesion and clogging. Furthermore, this dust part is sent to the second cyclone lO together with steam, and this second
By bringing the dust separated by the cyclone 10 into direct contact with the dehydrated cake with a high moisture content in the multi-stage dryer 1, a high rate of dust can be captured and dust scattering in the circulating steam can be prevented. can.
なお、先の例では熱風（熱媒）として加熱蒸気を用いた
が、燃焼排ガスあるいは加熱空気等を用いることもでき
る。In the previous example, heated steam was used as the hot air (heating medium), but combustion exhaust gas, heated air, or the like may also be used.
（実験例）
第１図に示すものと同等構成の汚泥処理装置を用い、脱
水ケーキを処理し、多段乾燥機のダストの分離回収を行
った。(Experimental Example) Using a sludge treatment apparatus having the same configuration as that shown in FIG. 1, a dehydrated cake was treated and dust from a multistage dryer was separated and recovered.
多段乾燥機は、乾燥床段数が５段、乾燥面の面積が５０
ｍ’、被乾燥物の移動速度が毎分０．５ｍ、加熱蒸気の
温度が３００ ’Ｃ１加熱蒸気の導入量が毎分５０ｍ３
に設定し、この多段乾燥機に水分が８０％の脱水ケーキ
を投入し、蒸気を向流に流して乾燥を行った。The multi-stage dryer has 5 drying beds and a drying surface area of 50.
m', the moving speed of the material to be dried is 0.5 m/min, the temperature of the heating steam is 300', the amount of C1 heating steam introduced is 50 m3/min
A dehydrated cake with a water content of 80% was placed in this multi-stage dryer, and the drying was performed by flowing steam countercurrently.
そして、この多段乾燥機から排出された蒸気（排出量毎
分５０ス３、温度１４０°Ｃ）を第１のサイクロンに導
入してダスト分離操作を行った。この排出蒸気中のダス
トの量は１０＠／ｍ３程度であった。次いでこの第１の
サイクロンの下部に分離されたダストを第１のサイクロ
ン内の蒸気とともに抜き出し、第２のサイクロンに導入
した、この蒸気導入量は毎分２ＩＩ！３であった。一方
、第１のサイクロンから多段乾燥機に返送される蒸気中
のダスト量は、０．３９７！Ｎ３以下であった。Then, the steam discharged from this multistage dryer (discharge rate: 50 s/min, temperature: 140° C.) was introduced into the first cyclone to perform a dust separation operation. The amount of dust in this exhaust steam was about 10@/m3. Next, the separated dust was extracted from the lower part of the first cyclone along with the steam in the first cyclone and introduced into the second cyclone.The amount of steam introduced was 2II per minute! It was 3. On the other hand, the amount of dust in the steam returned from the first cyclone to the multistage dryer is 0.397! It was below N3.
次いで、第２のサイクロンで分離されたダストを、第２
のサイクロン下部から多段乾燥機の上段に導入し、多段
乾燥機内に投入直後の脱水ケーキに接触させ捕捉させた
。また第２のサイクロンから排出されたダスト分離後の
蒸気は、第１のサイクロンに返送した。Next, the dust separated by the second cyclone is transferred to the second cyclone.
It was introduced from the lower part of the cyclone into the upper stage of the multi-stage dryer, and was brought into contact with and captured by the dehydrated cake immediately after being put into the multi-stage dryer. Further, the steam discharged from the second cyclone after dust separation was returned to the first cyclone.
このダスト分離操作においては、多段乾燥機から排出さ
れる蒸気中に含まれるダストをほぼ１００％の回収率で
分離回収することができ、各サイクロン内および各サイ
クロン間の管路にダストが付着する不都合もなく、ダス
ト分離回収操作を行うことができた。In this dust separation operation, the dust contained in the steam discharged from the multi-stage dryer can be separated and recovered with a recovery rate of almost 100%, and the dust adheres to the pipes within each cyclone and between each cyclone. The dust separation and recovery operation could be carried out without any inconvenience.
一方、第２のサイクロンを用いずに、第１のサイクロン
から分離ダストを直接多段乾燥機内に導入したところ、
多段乾燥機から排出される蒸気中のダストが再び多段乾
燥機から排出されてサイクロンに循環してしまい、第１
のサイクロンから排出される返送蒸気中にダストが同伴
される兆候が見られ、この兆候は多段乾燥機の蒸気を向
流とした場合の方が並流の場合より顕著であった。On the other hand, when the separated dust was directly introduced into the multistage dryer from the first cyclone without using the second cyclone,
The dust in the steam discharged from the multi-stage dryer is again discharged from the multi-stage dryer and circulated to the cyclone.
There were signs that dust was entrained in the return steam discharged from the cyclone, and this sign was more pronounced when the steam from the multi-stage dryer was flowed countercurrently than when it was cocurrently flowed.
「発明の効果」
以上説明したように、本発明では、乾燥機から排出され
た排ガスを、第１のサイクロンに導入し、該排ガス中の
ダストを分離し、更にこのダスト分を排ガスとともに第
２のサイクロンに送り、この第２のサイクロンで分離さ
れたダストを乾燥機内の含水率の高い被乾燥物に直接接
触させて捕捉することによって、ダストによる閉塞およ
び循環蒸気中のダスト飛散を防止することができる。"Effects of the Invention" As explained above, in the present invention, the exhaust gas discharged from the dryer is introduced into the first cyclone, the dust in the exhaust gas is separated, and this dust portion is further transferred to the second cyclone together with the exhaust gas. The dust separated by the second cyclone is brought into direct contact with the material to be dried with a high moisture content in the dryer and captured, thereby preventing clogging due to dust and scattering of dust in the circulating steam. Can be done.
第１図は本発明方法の一実施例を説明するためのらので
あって、汚泥処理装置の概略構成図である。
１・・・多段乾燥機（熱風直接乾燥機）３・・・脱水ケ
ーキ（被乾燥物）
８・・・第１のサイクロン
ＩＯ・・・第２のサイクロン。FIG. 1 is a schematic diagram of a sludge treatment apparatus for explaining an embodiment of the method of the present invention. 1... Multistage dryer (hot air direct dryer) 3... Dehydrated cake (material to be dried) 8... First cyclone IO... Second cyclone.
Claims (1)
で分離回収する方法であって、 乾燥機の排ガスを第１のサイクロン内に導入し、この第
１のサイクロンで分離されたダストを熱媒とともに抜き
出して第２のサイクロンに供給し、第２のサイクロンで
分離されたダストを上記乾燥機の含水率の高い被乾燥物
に直接接触させて捕捉させることを特徴とするサイクロ
ン分離物の回収方法。[Claims] A method for separating and collecting dust in the exhaust gas of a hot air direct dryer using a cyclone, the method comprising: introducing the exhaust gas of the dryer into a first cyclone; and collecting the dust separated by the first cyclone. A cyclone-separated product characterized in that the dust is extracted together with a heating medium and supplied to a second cyclone, and the dust separated by the second cyclone is brought into direct contact with and captured by the dried material having a high moisture content in the dryer. collection method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63251160A JPH0724733B2 (en) | 1988-10-05 | 1988-10-05 | Cyclone isolate recovery method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63251160A JPH0724733B2 (en) | 1988-10-05 | 1988-10-05 | Cyclone isolate recovery method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0299110A true JPH0299110A (en) | 1990-04-11 |
| JPH0724733B2 JPH0724733B2 (en) | 1995-03-22 |
Family
ID=17218568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63251160A Expired - Lifetime JPH0724733B2 (en) | 1988-10-05 | 1988-10-05 | Cyclone isolate recovery method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0724733B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07136697A (en) * | 1993-11-16 | 1995-05-30 | Nishihara Environ Sanit Res Corp | Apparatus and method for removing hair from centrifugal granulator/dryer |
| JP2017087126A (en) * | 2015-11-09 | 2017-05-25 | 大同特殊鋼株式会社 | Carbonization facility of sludge |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4841011B2 (en) * | 2009-07-15 | 2011-12-21 | 月島機械株式会社 | Hydrous substance combustion treatment equipment and method |
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|---|---|---|---|---|
| JPS51125401A (en) * | 1975-03-11 | 1976-11-01 | Mitsubishi Petrochem Co Ltd | Method for separating particles |
| JPS5821771U (en) * | 1981-07-29 | 1983-02-10 | 株式会社神戸製鋼所 | Heat exchange unit between powder and gas |
| JPS62266134A (en) * | 1986-02-13 | 1987-11-18 | イエ−タベルケン エネルギ− システムス アクテイ−ボラ−グ | Separation of particles from gas formed in thermal cracking gasifying apparatus |
-
1988
- 1988-10-05 JP JP63251160A patent/JPH0724733B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51125401A (en) * | 1975-03-11 | 1976-11-01 | Mitsubishi Petrochem Co Ltd | Method for separating particles |
| JPS5821771U (en) * | 1981-07-29 | 1983-02-10 | 株式会社神戸製鋼所 | Heat exchange unit between powder and gas |
| JPS62266134A (en) * | 1986-02-13 | 1987-11-18 | イエ−タベルケン エネルギ− システムス アクテイ−ボラ−グ | Separation of particles from gas formed in thermal cracking gasifying apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07136697A (en) * | 1993-11-16 | 1995-05-30 | Nishihara Environ Sanit Res Corp | Apparatus and method for removing hair from centrifugal granulator/dryer |
| JP2017087126A (en) * | 2015-11-09 | 2017-05-25 | 大同特殊鋼株式会社 | Carbonization facility of sludge |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0724733B2 (en) | 1995-03-22 |
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