JPH0631300A - Method for dehydrating and drying sludge - Google Patents
Method for dehydrating and drying sludgeInfo
- Publication number
- JPH0631300A JPH0631300A JP4216513A JP21651392A JPH0631300A JP H0631300 A JPH0631300 A JP H0631300A JP 4216513 A JP4216513 A JP 4216513A JP 21651392 A JP21651392 A JP 21651392A JP H0631300 A JPH0631300 A JP H0631300A
- Authority
- JP
- Japan
- Prior art keywords
- cake
- filter
- filter chamber
- moisture
- gas
- 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
Landscapes
- Treatment Of Sludge (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、上水道等の処理場で
発生する汚泥の処理方法の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for treating sludge generated in a treatment plant such as waterworks.
【０００２】[0002]
【従来の技術】従来、汚泥を脱水するには、より水分を
切るために脱水処理中に加熱したり、高圧の空気をケー
キ中に吹き込んだりすることはよく知られている。脱水
処理中にケーキを加熱することは、ベルトプレスや真空
脱水機のロール内に加熱源を内装することがよく知られ
ており、フイルタプレスの場合でもろ板内に加熱源を設
けることが知られている。（例えば、実公昭３４−６５
８９号）さらに、乾燥のためにろ過室内のケーキを加熱
する具体例として特公平４−２９４０５号がある。この
発明では、加熱膜でスラリーを加熱し、加熱で発生した
蒸気を真空吸引して除去するようにしている。また、ケ
ーキ内に高圧空気を吹き込む先行技術の具体的例として
は、特公昭６４−８５号発明がある。2. Description of the Related Art Conventionally, in order to dehydrate sludge, it is well known that heating is performed during the dehydration treatment to blow off more water and that high-pressure air is blown into the cake. It is well known to heat the cake during the dehydration process by installing a heating source inside the roll of a belt press or vacuum dehydrator, and even in the case of a filter press, it is known to provide a heating source inside the filter plate. Has been. (For example, Jitsuko Sho-34-65
89) Further, as a specific example of heating the cake in the filtration chamber for drying, there is JP-B-4-29405. In the present invention, the slurry is heated by the heating film, and the vapor generated by the heating is vacuumed and removed. Further, as a specific example of the prior art in which high pressure air is blown into the cake, there is the invention of Japanese Examined Patent Publication No. 64-85.
【０００３】[0003]
【発明が解決しようとする課題】然しながら、従来の加
熱技術は、スラリーのろ過性を保つためのものであった
り、加熱手段としてもろ板や膜を加熱するものであっ
て、その構造が複雑である。また、特公昭６４−８５号
は、ケーキ内に高圧空気を吹き込むのみで比較的簡単な
操作でケーキの水分を低減し得るが、常温空気であり、
その脱水効果は従来のダイヤフラムによる圧搾の効果程
度のものである。However, the conventional heating technique is for maintaining the filterability of the slurry or for heating the filter plate or the membrane as a heating means, and its structure is complicated. is there. Further, Japanese Examined Patent Publication No. 64-85 can reduce the water content of the cake by a relatively simple operation only by blowing high-pressure air into the cake, but it is room temperature air.
The dewatering effect is comparable to the effect of pressing with a conventional diaphragm.
【０００４】[0004]
【課題を解決するための手段】この発明は、密封ろ過室
に発生したケーキに対して高圧高温のガスを吹き込むこ
とによって、上述のような従来の課題を解消したもので
あって、その要旨とするところは、上水道等の汚泥を脱
水乾燥するに当り、汚泥を密封ろ過室に圧入して圧搾
し、発生したケーキに高圧の高温ガスを吹き込んだの
ち、ケーキを密閉ろ過室から取り出すようにしたもので
ある。上記密閉ろ過室は、フイルタプレスのろ板間に形
成される高圧高温に耐え得るろ過室が適当であるが、真
空脱水機やベルトプレスのろ過部であってもよく、ケー
キを密封できるように構成すればよい。また、吹き込む
高温ガスは、過熱蒸気が適切であるが、ボイラー等の燃
焼排気ガスであってもよい。The present invention solves the above-described conventional problems by blowing a high-pressure and high-temperature gas into a cake generated in a sealed filtration chamber. Where, when dehydrating and drying sludge such as waterworks, sludge was pressed into a sealed filtration chamber and squeezed, high-pressure hot gas was blown into the generated cake, and then the cake was taken out from the sealed filtration chamber. It is a thing. The closed filtration chamber is preferably a filtration chamber that can withstand high pressure and high temperature formed between filter plates of a filter press, but it may be a filtration unit of a vacuum dehydrator or a belt press so that the cake can be sealed. Just configure it. The hot gas to be blown is preferably superheated steam, but may be combustion exhaust gas from a boiler or the like.
【０００５】[0005]
【作用】上述のように、この発明では、高温高圧のガス
が直接ケーキ中に吹き込まれるので、ケーキが加熱さ
れ、その水分が蒸発して室外に取り出される。すなわ
ち、ケーキ中の水分は気体状でガスに伴われて室外に取
り出されるもので、従来の加熱膜やろ板の加熱による蒸
発水分を室外に取り出すものに比較して特別に取り出す
手段を必要としない。また、ケーキ中に吹き込むガス
は、高温（ケーキを８０℃以上に加熱できる温度）であ
るので、ろ過室から取り出されたケーキは高温であり、
ろ過室外に放置するだけでさらに水分が蒸発し、乾燥す
ることができる。また、この発明では、ケーキを高温
（８０℃以上）に加熱するので、ケーキ中に含まれる雑
菌、雑草の種子を死滅させることができ、従来、これら
雑菌、雑草の種子のため、田畠等に直接還元できなかっ
た汚泥を即還元できるものである。すなわち、この発明
に係る方法によれば、雑菌、雑草の種子のないケーキが
自動的に得られるもので、この発明を上水および下水等
の汚泥に適用すると従来必要とした雑菌や雑草の種子の
処理装置を必要としないものである。以下、図面に基づ
いてこの発明を具体的に説明する。As described above, in the present invention, the high-temperature and high-pressure gas is blown directly into the cake, so that the cake is heated and the water content thereof is evaporated and taken out of the room. That is, the water in the cake is gaseous and is taken out of the room along with the gas, so that there is no need for special means for taking out the evaporated water by heating the heating film or the filter plate to the outside. . Moreover, since the gas blown into the cake has a high temperature (a temperature at which the cake can be heated to 80 ° C. or higher), the cake taken out from the filtration chamber has a high temperature.
Water can be evaporated and dried simply by leaving it outside the filtration chamber. Further, in the present invention, since the cake is heated to a high temperature (80 ° C. or higher), it is possible to kill the germs and weed seeds contained in the cake. The sludge that could not be directly returned can be immediately returned. That is, according to the method according to the present invention, a cake without germs and seeds of weeds is automatically obtained, and when the present invention is applied to sludge such as tap water and sewage, seeds of germs and weeds conventionally required. It does not require the processing device. Hereinafter, the present invention will be specifically described with reference to the drawings.
【０００６】[0006]
【実施例】図１および図２は、この発明を実施するに用
いるフイルタプレスの全体の側面図およびそのろ板の一
部を取り出して示す縦断側面図であり、図１において、
符号１はフレーム、２はフレーム１，１間に橋架したガ
イドレール、３はガイドレール２上に移動自在に配列し
たろ板であり、リンクチェーン４で互いに連結されてい
て、チェーン５によって同時に開閉するようにしてあ
る。そして、各ろ板間には、ろ布が吊設してあって各ろ
板を閉板したときには、そのろ布によって密閉されたろ
過室が構成されるようにしてある。1 and 2 are a side view of an entire filter press used for carrying out the present invention and a vertical sectional side view showing a part of a filter plate thereof. In FIG.
Reference numeral 1 is a frame, 2 is a guide rail bridged between the frames 1 and 1, and 3 is a filter plate movably arranged on the guide rail 2, which are connected to each other by a link chain 4 and simultaneously opened and closed by a chain 5. I am doing it. A filter cloth is hung between the filter plates. When the filter plates are closed, a filter chamber closed by the filter cloth is formed.
【０００７】次に、ろ板間に構成されるろ過室を図２に
基づいて説明する。図２において、符号６はろ布であ
り、耐熱性の材料で構成されて左右のろ板３のろ過床３
ａを覆うように設けられており、その上部は合着されて
その合着部に給液板７が取り付けられている。合着した
ろ布６の上縁には上部支持バー８が取り付けられて、こ
の上部支持バー８には、駆動スプロケット９に巻き掛け
たチェーン１０に連結されている。一方、ろ布６の下端
部は、ろ板３の下部に設けたリターンロール１１に巻き
回した上で隣接するろ板間に同じく設けたろ布６の下端
部と合着され、その合着部に下部支持バー１２を設け、
この下部支持バー１２が前述のチェーン１０の下端に連
結されている。Next, the filtration chamber formed between the filter plates will be described with reference to FIG. In FIG. 2, reference numeral 6 is a filter cloth, which is made of a heat-resistant material and has filter beds 3 of left and right filter plates 3.
It is provided so as to cover a, the upper part of which is joined, and the liquid supply plate 7 is attached to the joined portion. An upper support bar 8 is attached to the upper edge of the bonded filter cloth 6, and the upper support bar 8 is connected to a chain 10 wound around a drive sprocket 9. On the other hand, the lower end portion of the filter cloth 6 is wound around the return roll 11 provided at the lower portion of the filter plate 3 and is joined to the lower end portion of the filter cloth 6 which is also provided between the adjacent filter plates. Lower support bar 12
The lower support bar 12 is connected to the lower end of the chain 10 described above.
【０００８】次に、図２において、符号１３は、ろ板３
を厚み方向に貫く給液路であり、ろ板３を閉板したとき
には、前述の給液板７の給液路７ａとパイプ状に繋がっ
て、ろ板間においてろ布６，６で形成されるろ過室に連
通するようにしてある。また、符号１４は、その始端が
ろ板３のろ過床３ａに開口するろ液の取出路である。
尚、図示のものではダイヤフラムを取り付けていない
が、ダイヤフラムを用いてケーキを圧搾する場合には、
ダイヤフラムはろ過床に取り付けられるものである。ま
た、図示のものでは、ろ過床３ａの詳細構造を省略して
いるが、普通ろ過床３ａは突条あるいは突起を配設して
ろ液の流下溝が形成されているものである。さらに、図
示のものでは、ろ材としてろ布６を用いているが、メタ
ルメッシュ等を用いてもよい。この場合、ろ材は固定さ
れ、給液板７も必要としないものである。Next, in FIG. 2, reference numeral 13 is a filter plate 3.
Is a liquid supply passage that penetrates in the thickness direction, and when the filter plate 3 is closed, it is connected to the liquid supply passage 7a of the liquid supply plate 7 described above in a pipe shape and is formed by filter cloths 6 and 6 between the filter plates. It connects to the filtration chamber. Further, reference numeral 14 is a filtrate take-out path whose starting end opens to the filtration bed 3 a of the filter plate 3.
Although the diaphragm is not attached in the one shown in the figure, when pressing the cake using the diaphragm,
The diaphragm is attached to the filtration bed. Although the detailed structure of the filtration bed 3a is omitted in the drawing, the normal filtration bed 3a is provided with projections or protrusions to form a flow-down groove for the filtrate. Further, although the filter cloth 6 is used as the filter medium in the illustrated one, a metal mesh or the like may be used. In this case, the filter medium is fixed and the liquid supply plate 7 is not necessary.
【０００９】この発明に係るフイルタプレスは上述のよ
うに構成されており、これを用いて汚泥を脱水乾燥する
には、各ろ板３を閉板して各ろ板間にろ布６，６でろ過
室を形成し、このろ過室に汚泥を圧入して脱水したの
ち、ろ過室に生じたケーキに対して、ろ液取出路１４か
ら高温高圧のガスを吹き込めばよい。すなわち、圧入脱
水されたケーキは、高圧高温ガスによって加熱されてそ
の水分が蒸発し、蒸発した水分はガスとともに給液路１
３を通って機外に排出され、乾燥されるものである。こ
のケーキを加熱乾燥するに当って、この発明では、ケー
キを密閉したろ過室内で加熱するので、加熱ガスの熱が
他に逃げることなく、有効に使われるとともに、蒸発し
た水分はガスと共に機外に排出され、ケーキから完全に
分離することができる。また、この発明では、ケーキが
高温に加熱されているので、高圧高温ガスのブローを終
わったのち、ろ板３を開板してケーキを取り出したのち
もケーキは高温を保ち、水分の蒸発が継続して乾燥を進
行せしめることができる。The filter press according to the present invention is constructed as described above. To dehydrate and dry sludge using the filter press, each filter plate 3 is closed and filter cloths 6, 6 are provided between the filter plates. After forming a filtration chamber with, the sludge is press-fitted into the filtration chamber for dehydration, a high temperature and high pressure gas may be blown into the cake generated in the filtration chamber from the filtrate outlet passage 14. That is, the cake that has been press-fitted and dehydrated is heated by the high-pressure high-temperature gas to evaporate its water content, and the evaporating water content together with the gas is supplied to the liquid supply passage
It is discharged to the outside of the machine through 3 and dried. In heating and drying the cake, according to the present invention, the cake is heated in a closed filtration chamber, so that the heat of the heating gas does not escape to the other and is effectively used, and the evaporated water and the gas are out of the machine. It can be completely separated from the cake. Further, in the present invention, since the cake is heated to a high temperature, after the high-pressure high-temperature gas is blown, the filter plate 3 is opened and the cake is taken out. And drying can be promoted.
【００１０】以上は、この発明をフイルタプレスのろ過
室に適用した事例であるが、これを真空脱水機のろ過室
に用い得るは勿論であり、これをベルトプレスの如くろ
過脱水部分がオープンのものに対しても、該部を密閉構
造とすることによって適用することができる。また、ろ
過脱水のためのろ材もろ布に限ることなく、メタルメッ
シュ等を用い得るは勿論であり、要するに耐熱性および
耐圧性有するろ材なれば広く適用できるものである。The above is an example in which the present invention is applied to a filter chamber of a filter press, but it is needless to say that it can be used in a filter chamber of a vacuum dehydrator, and the filter dehydrator is opened like a belt press. It can also be applied to objects by making the part have a closed structure. Further, the filter medium for filtration and dehydration is not limited to the filter cloth, and it goes without saying that a metal mesh or the like can be used, and in short, any filter medium having heat resistance and pressure resistance can be widely applied.
【００１１】[0011]
【発明の効果】このように、この発明は、高温高圧のガ
スを密閉したろ過室に吹き込むことによって、ろ過室の
ケーキを加熱昇温して水分を蒸発分離するとともに、分
離した水分を直ちにろ過室外に排出できるものであっ
て、密閉室内での加熱であるので熱を逃すことがなく、
効率がよい上、分離した水分をケーキ内に復帰させるこ
ともなく、脱水機から直ちに乾燥ケーキを得ることがで
きる。さらに、ケーキは高圧下で高温に加熱されている
ので殺菌、殺虫されているはもとより、ろ過室から取り
出した段階の低圧下ではさらに、水分が蒸発して、乾燥
が一層進行し、高脱水された乾燥ケーキを得ることがで
きるものである。As described above, according to the present invention, by blowing a high-temperature and high-pressure gas into a closed filtration chamber, the cake in the filtration chamber is heated and heated to evaporate and separate water, and the separated water is immediately filtered. It can be discharged to the outside of the room, and since it is heating in a closed room, it does not release heat,
In addition to being highly efficient, the dried cake can be immediately obtained from the dehydrator without returning the separated water to the cake. Furthermore, since the cake is heated to a high temperature under high pressure, it is not only sterilized and killed, but also under a low pressure when it is taken out of the filtration chamber, the water content evaporates further and the drying progresses further, resulting in high dehydration. A dried cake can be obtained.
【図１】この発明に係るフイルタプレスの概略の側面図
である。FIG. 1 is a schematic side view of a filter press according to the present invention.
【図２】図１のろ板の一部を取り出して示す縦断側面図
である。FIG. 2 is a vertical sectional side view showing a part of the filter plate of FIG.
Claims (3)
汚泥を密閉ろ過室に圧入して圧搾し、発生したケーキに
高圧の高温ガスを吹き込んだのち、ケーキを密閉ろ過室
から取り出すことを特長とする汚泥の脱水乾燥方法。1. When dehydrating and drying sludge from waterworks,
A method for dewatering and drying sludge, which comprises pressing sludge into a closed filtration chamber, squeezing it, blowing high-pressure high-temperature gas into the cake, and then removing the cake from the closed filtration chamber.
間に形成されるろ過室である汚泥の脱水乾燥方法。2. A method for dehydrating and drying sludge, wherein the closed filtration chamber is a filtration chamber formed between filter plates of a filter press.
水乾燥方法。3. A method for dehydrating and drying sludge, wherein the high temperature gas is superheated steam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4216513A JP2904378B2 (en) | 1992-07-21 | 1992-07-21 | Dehydration drying method of filter press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4216513A JP2904378B2 (en) | 1992-07-21 | 1992-07-21 | Dehydration drying method of filter press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0631300A true JPH0631300A (en) | 1994-02-08 |
| JP2904378B2 JP2904378B2 (en) | 1999-06-14 |
Family
ID=16689617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4216513A Expired - Fee Related JP2904378B2 (en) | 1992-07-21 | 1992-07-21 | Dehydration drying method of filter press |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2904378B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106693518A (en) * | 2016-12-26 | 2017-05-24 | 浙江金鸟压滤机有限公司 | Filter plate and production technology thereof |
| CN109734235A (en) * | 2019-02-25 | 2019-05-10 | 北京朗净时代环境科技有限公司 | A kind of desulfurization wastewater zero discharge filtering apparatus |
-
1992
- 1992-07-21 JP JP4216513A patent/JP2904378B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106693518A (en) * | 2016-12-26 | 2017-05-24 | 浙江金鸟压滤机有限公司 | Filter plate and production technology thereof |
| CN109734235A (en) * | 2019-02-25 | 2019-05-10 | 北京朗净时代环境科技有限公司 | A kind of desulfurization wastewater zero discharge filtering apparatus |
| CN109734235B (en) * | 2019-02-25 | 2024-05-07 | 北京朗净时代环境科技有限公司 | Desulfurization waste water zero release filter equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2904378B2 (en) | 1999-06-14 |
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