JP2668010B2 - Sludge filtration concentrator - Google Patents

Sludge filtration concentrator

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JP2668010B2
JP2668010B2 JP6129509A JP12950994A JP2668010B2 JP 2668010 B2 JP2668010 B2 JP 2668010B2 JP 6129509 A JP6129509 A JP 6129509A JP 12950994 A JP12950994 A JP 12950994A JP 2668010 B2 JP2668010 B2 JP 2668010B2
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sludge
air
concentrated
valve
portion
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JPH0768107A (en
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康弘 三井
寛 本橋
真一郎 江川
正徳 衛藤
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株式会社荏原製作所
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Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は、上水処理,産業用水処理,下水処理,し尿処理,産業排水処理などで発生する汚泥をろ過濃縮するための装置に関するもので、特に汚泥を天日乾燥床や、加圧脱水機,遠心脱水機,凍結融解機等で脱水する場合の前処理として使用する汚泥ろ過濃縮装置に関するものである。 BACKGROUND OF THE INVENTION The present invention, clean water treatment, industrial water treatment, sewage treatment, night soil treatment, relates to an apparatus for filtering concentrated sludge from industrial waste water treatment, in particular solar drying sludge floor and pressurized dehydrating machine, a centrifugal dehydrator, to a sludge filtration concentrator for use as a pre-treatment in the case of dehydration by freeze-thaw or the like.

【従来の技術】 BACKGROUND OF THE INVENTION

【0002】従来、上水処理,産業用水処理,下水処理,し尿処理,産業排水処理などで発生する汚泥を脱水する場合、汚泥に鉄塩等の無機凝集剤,石灰、または高分子凝集剤等の脱水助剤を添加し、水中造粒脱水機,真空ろ過機,加圧ろ過機,遠心脱水機,ベルトプレス型脱水機等の脱水機で脱水処理していた。 [0002] clean water treatment, industrial water treatment, sewage treatment, night soil treatment, when dehydrating the sludge from industrial waste water treatment, inorganic flocculant iron salt such as sludge, lime or polymer coagulant or the like, It added a dehydrating aid, underwater granulator dehydrator, vacuum filter, pressure filtration apparatus, a centrifugal dehydrator, was dehydrated by a belt press dewatering machine or the like of the dehydrator. 近年、特に上水処理,産業用水処理等の分野で、薬注なしの天日乾燥床や加圧脱水機で脱水処理するケースが増えてきている。 In recent years, especially clean water treatment, in the field of industrial water treatment and the like, there has been an increasing number of cases to be dehydrated in the sun drying bed and pressurized dewatering machine without chemical feeding, chemical dosing. このような脱水処理をする場合、天日乾燥床や、加圧脱水機へ供給する際の汚泥の濃度が非常に重要であり、汚泥濃度が薄いと天日乾燥床や、加圧脱水機での処理効率が著しく低下する。 When performing such dehydration treatment, and solar drying bed, the concentration of the sludge in supplying the pressurized dehydration machine is very important, thin, and solar drying bed sludge concentration, treatment with pressurized dewatering machine efficiency is remarkably lowered. 従来、汚泥の前濃縮にはシックナーなどの沈降法(沈殿法)が用いられてきたが、最近では汚泥中に有機物や水酸化アルミニウム等の濃縮しにくい成分の割合が増加し、沈降法では十分に濃縮できないことが多くなってきた。 Conventionally, sedimentation method, such as thickeners prior to concentration of the sludge (precipitation method) have been used, the proportion of the concentrated hard components such as organic substances and aluminum hydroxide is increased in the sludge recently, sufficient for precipitation It can not be concentrated to have become many.

【0003】そのため、従来では図5に示すようなろ過濃縮装置が用いられていた。 [0003] Therefore, the filtration concentrator as shown in FIG. 5 has been used in the prior art. 即ち、密閉槽1内に水平の仕切板2によって汚泥濃縮部3とその上部にろ液を集める集液部4が区画形成され、汚泥濃縮部3には汚泥流入弁5を備えた汚泥流入管6が連設され、集液部4にはろ液弁7を備えたろ液流出管8と空気抜弁9を備えた空気抜管10が連設されている。 That is, the liquid collecting unit 4 for collecting the filtrate and thereon sludge condensing portion 3 is defined and formed in the closed vessel 1 by a horizontal partition plate 2, the sludge inlet pipe for sludge concentration unit 3 having a sludge inlet valve 5 6 is continuously provided, air extubation 10 with the filtrate outlet pipe 8 and the air vent valve 9 having a liquid collection portion 4 Niwaroekiben 7 is continuously provided. さらに、汚泥濃縮部3内には、支持体の外周にろ布を巻き付け、一端を開放し他端を閉鎖した筒状フィルターエレメント(以下単にエレメントという)11が配設され、各開放端部付近が仕切板2に固定され、エレメント11内に透過したろ液がその開放端を経て集液部4内に流れるようになっている。 Furthermore, in the sludge condensing unit 3, wound filter cloth on the outer periphery of the support member, one end an open tubular filter element (hereinafter simply referred to as elements) which closes the other end 11 is arranged, near each open end There is fixed to the partition plate 2, the transmitted filtrate is made to flow to the liquid collection portion 4 through the open end into the element 11. また、密閉槽1内下方部は濃縮汚泥排出部12が形成され、濃縮汚泥排出弁13を備えた濃縮汚泥排出管14が連設されている。 Further, in the lower portion closed tank 1 is formed concentrated sludge discharge section 12, the concentrated sludge discharge pipe 14 provided with a concentrated sludge discharge valve 13 is continuously provided.

【0004】このようなろ過濃縮装置は、図6に示すように、汚泥流入管6を、吸込側が原汚泥貯槽15に連なる汚泥ポンプ16の吐出側に連結し、原汚泥貯槽15に貯留された原汚泥を、汚泥ポンプ16にて汚泥流入管6 [0004] Such filtration concentrator, as shown in FIG. 6, a sludge inlet pipe 6, the suction side is connected to the discharge side of the sludge pump 16 connected to the raw sludge storage tank 15, stored in the raw sludge storage tank 15 the raw sludge, sludge inlet pipe in the sludge pump 16 6
を経て密閉槽1内の汚泥濃縮部3に供給するが、原汚泥を汚泥ポンプ16によって圧入するか、あるいは集液部4側を減圧することによって、エレメント11内外に生じた差圧によりエレメント11の外側に汚泥が付着し濃縮される一方、ろ液はエレメント11の内部に透過して集液部4に集められ、ろ液流出管8から流出する。 By supplies the sludge condensing portion 3 in the closed vessel 1 through either the raw sludge to pressure with sludge pump 16, or to depressurize the liquid collection portion 4 side, the element 11 due to the pressure difference generated in the element 11 and out on one of the sludge is concentrated attached to the outside, the filtrate is collected in the liquid collection portion 4 passes through the inside of the element 11, it flows out from the filtrate outlet pipe 8. このような操作により、エレメント11の外側に付着し所定濃度に汚泥が濃縮された時には、原汚泥の供給を停止し、戻し弁17を開いて戻し管18から汚泥濃縮部3内の未濃縮汚泥を原汚泥貯槽15に戻したのち戻し弁17 By this operation, when the sludge is concentrated to a predetermined concentration was attached to the outside of the element 11, stops the supply of the raw sludge, unconcentrated sludge in the sludge concentration unit 3 from the return pipe 18 by opening the return valve 17 back then was returned to the raw sludge storage tank 15 valve 17
を閉じ、汚泥濃縮部3内を大気に開放したのち、エレメント11内に圧力空気などをブローして外側に付着している濃縮汚泥を剥離し、濃縮汚泥は濃縮汚泥排出部12 Closed, after the inside of the sludge concentrated portion 3 is open to the atmosphere, and peeled off the concentrated sludge adhering to the outer and blowing like pressure air into the element 11, the concentrated sludge is concentrated sludge discharge portion 12
に落下し、濃縮汚泥排出弁13を開いて濃縮汚泥排出管14から排出される。 It falls into, and discharged from the concentrated sludge discharge pipe 14 by opening the concentrated sludge discharge valve 13. そして濃縮汚泥の剥離,排出工程終了後は、濃縮汚泥排出弁13を閉じ、汚泥濃縮部3内の大気開放を遮断し、再び汚泥ポンプ16にて原汚泥貯槽15内の汚泥を汚泥濃縮部3に充満したのち、前述のようなろ過濃縮が行われる。 The separation of the concentrated sludge, after the discharge step is completed, close the concentrated sludge discharge valve 13, to block the air opening in the sludge condensing unit 3, the sludge concentrated portion 3 a sludge raw sludge storage tank 15 at the sludge pump 16 again After filling the carried out filtration enrichment as described above.

【0005】 [0005]

【発明が解決しようとする課題】このような汚泥充満工程,ろ過濃縮工程,未濃縮汚泥排出工程,濃縮汚泥剥離,排出工程を1サイクルとした従来の装置では、次のような多くの問題点を有していた。 [Problems that the Invention is to Solve Such sludge filling process, filtration concentration step, unconcentrated sludge discharge step, the concentrated sludge peeling, in the conventional apparatus wherein one cycle is discharging process, many, such as: a problem the had. 未濃縮汚泥排出工程における密閉槽1から原汚泥貯槽15への未濃縮汚泥の返送は、動力費等の低減のためにも自然流下方式が好ましく、そのために原汚泥貯槽1 Return of unconcentrated sludge from the sealed vessel 1 in the non-concentrated sludge discharge step to raw sludge storage tank 15, preferably gravity flow scheme in order to reduce power costs, etc., raw sludge storage tank to the 1
5の高水位(HWL)は密閉槽1より低いことが必要で、平地においては原汚泥貯槽15を埋設、あるいは密閉槽1を高架にせねばならず、建設費が多くなる。 5 High level (HWL) is required to be lower than the sealing vessel 1, in flat embedding a raw sludge storage tank 15, or the closed vessel 1 not a Senebanara the elevated, becomes large construction costs. 未濃縮汚泥が原汚泥貯槽15に返送されると、原汚泥貯槽15の容量は最大返送量分を見込まなければならず、非常に大きくなる。 When unconcentrated sludge is returned to the raw sludge storage tank 15, the capacity of the raw sludge storage tank 15 must expect a maximum return amount becomes very large. ろ過濃縮工程が終了した時点での密閉槽1内の未濃縮汚泥量は、密閉槽1内の集液部4とエレメント11内ろ液部を除いた60〜80%程度と、非常に大きな量である。 Unconcentrated sludge amount in the sealed vessel 1 at the time of the filtration concentration step is completed, and about 60% to 80% excluding the liquid collection portion 4 and the element 11 in the filtrate of the closed vessel 1, a very large amount it is. このため、未濃縮汚泥排出工程及び次回のろ過濃縮工程前の汚泥充満工程に要する時間、いわゆる雑時間が増え、1サイクル当たりの所要時間も多くなる。 Therefore, unconcentrated sludge discharge step and the time required for the next filtration concentration step prior to the sludge filling process, so-called coarse time is increased, the more even the time required per cycle. さらに、汚泥充満工程における汚泥ポンプ16の稼動により、動力費も多くなる。 Further, by the operation of the sludge pump 16 in the sludge filling step, many power cost. 未濃縮汚泥排出工程により、密閉槽1内のエレメント11が空気と接触することになる。 The unconcentrated sludge discharge step, the element 11 in the sealed vessel 1 is brought into contact with air. さらに、空気ブロー等にて濃縮汚泥の剥離を行うと、均等に剥離できないばかりかエレメント11内に残留又は付着しているろ液等が酸化状態になる。 Furthermore, when the separation of the concentrated sludge by air blow or the like, the filtrate or the like is oxidized state which remains or adheres to only one element 11 can not be evenly peel. そのため、原汚泥貯槽15において、あるいはそれ以前に行われた濃縮操作等において、 Therefore, in the original sludge storage tank 15, or in the concentration operation or the like in which it was previously made,
還元状態でイオン化されていた鉄,マンガン等が酸化されてエレメント11に付着し、その通気度の低下,ろ過速度の低下ともなり、寿命も著しく短くなる。 Iron has been ionized under reducing conditions, and manganese are oxidized to adhere to the element 11, decrease in the air permeability, also becomes decrease in filtration rate, life considerably shortened. 本発明は、このような従来の問題点を解決し、従来の汚泥充満工程,未濃縮汚泥排出工程を行うことなく、ろ過濃縮装置内の汚泥濃縮部を汚泥で満杯にした状態のままで濃縮汚泥の剥離,排出を行い、雑時間,ランニングコストの低減,設備の簡素化,エレメントの目詰まり防止等を図ることができる汚泥ろ過濃縮装置を提供することを目的としている。 The present invention is to solve such conventional problems, conventional sludge filling step, concentrated without unconcentrated sludge discharge step, the sludge concentration of the filtration concentrator in the state that filled with sludge separation of the sludge, Evacuate, miscellaneous time, reduction of running cost, simplification of equipment, and its object is to provide a sludge filtration concentrator can be achieved preventing clogging of the element.

【0006】 [0006]

【課題を解決するための手段】本発明は、密閉槽1内に汚泥濃縮部3と集液部4とを仕切板2で区画形成し、汚泥濃縮部3内に一端を開放して他端を閉鎖した複数の筒状フィルターエレメント11を仕切板2に垂下配設し、 The present invention SUMMARY OF THE INVENTION may, and a sludge concentration section 3 and the liquid collection portion 4 is defined and formed by the partition plate 2 in the sealed vessel 1, it is opened at one end to the sludge condensing unit 3 and the other end suspended disposed a plurality of tubular filter element 11 which is closed to the partition plate 2,
その開放端部を集液部4に連通し、該集液部4にろ液弁7のあるろ液流出管8を設け、前記密閉槽1の汚泥濃縮部3内に汚泥流入弁5のある汚泥流入管6から汚泥を供給し、前記筒状フィルターエレメント11内に透過したろ液を集液部4を経て槽外に流出させて汚泥のろ過濃縮を行う装置において、前記汚泥濃縮部3内上部に連通する空気抜管20と、該空気抜管20に設けた空気抜弁1 Communicating the open end into the liquid collecting unit 4, the filtrate outlet pipe 8 with said population liquid portion 4 Niroekiben 7 provided with sludge inlet valve 5 into the sludge condensing portion 3 of the closed vessel 1 sludge is supplied from the sludge inlet pipe 6, the tubular filter the transmitted filtrate element 11 via the liquid collection portion 4 is flow out of the tank and the apparatus for performing the filtration concentration of sludge, the sludge concentrated portion 3 an air extubation 20 communicating with the upper air vent valve 1 provided on the air extubation 20
9とを備え、前記集液部4に空気抜弁9を備えた空気抜管10を設けると共に、空気流入弁21を備え、空気源に連なる空気管22と、真空弁23を備え真空源に連なる真空管24とを連通配備したものである。 And a 9, provided with an air extubation 10 having an air vent valve 9 to the liquid collection portion 4, an air inlet valve 21, an air pipe 22 connected to the air source, vacuum tube connected to a vacuum source comprising a vacuum valve 23 is obtained by deploying communicates the 24.

【0007】 [0007]

【作用】汚泥流入管6より汚泥を密閉槽1に供給してろ過濃縮するには、空気抜弁19,空気流入弁21,真空弁23,濃縮汚泥排出弁13を閉として、汚泥流入弁5,ろ液弁7,空気抜弁9を開とし、汚泥ポンプ16を稼動して汚泥濃縮部3内に汚泥を押込むと、汚泥濃縮部3内に貯留されている汚泥に圧力がかかり、フィルターエレメント11によってろ過されてフィルターエレメント11 [Act] To filtered and concentrated to supply the sludge from the sludge inlet pipe 6 in the sealed vessel 1, the air vent valve 19, an air inlet valve 21, vacuum valve 23, a concentrated sludge discharge valve 13 is closed, sludge inlet valve 5, the filtrate valve 7, the air vent valve 9 is opened, and the sludge running the sludge pump 16 in the sludge concentration unit 3 pushed, pressure is applied to the sludge that is retained in the sludge condensing unit 3, the filter element 11 It is filtered by the filter element 11
の外側には汚泥が付着して濃縮され、ろ液はフィルターエレメント11内を経て集液部4に貯留され、ろ液弁7 Of the outer concentrated adhered sludge, the filtrate is stored in the liquid collection portion 4 via the filter element 11, the filtrate valve 7
から流出する。 Flowing out from. この時、集液部4内のろ液はHWLに保たれる。 At this time, the filtrate in the liquid collection portion 4 is kept HWL. このようなろ過濃縮工程終了後は、フィルターエレメント11の外側に付着している濃縮汚泥の剥離, After completion of such a filtration concentrating step, the release of concentrated sludge adhering to the outside of the filter element 11,
排出工程に移るが、ろ過濃縮工程終了後、汚泥濃縮部3 Turning to the discharge process, after the completion of the filtration concentration step, sludge concentrating section 3
内の汚泥を排出することなく、そのままとし、汚泥ポンプ16を停止し、汚泥流入弁5,ろ液弁7,空気抜弁9 Without discharging the sludge of the inner, and as such, the sludge pump 16 is stopped, sludge inlet valve 5, the filtrate valve 7, the air vent valve 9
を閉にし、真空弁23,空気抜弁19を開にし、集液部4を真空状態とし、ろ液のレベルをHWLに保つ。 Was closed, the vacuum valve 23, the air vent valve 19 is opened, the liquid collection portion 4 to a vacuum state, keeping the level of the filtrate to HWL. 次に、真空弁23を閉、空気抜弁9を開にすると、集液室4内の真空状態が破壊され、集液室4内のろ液がフィルターエレメント11内へ逆流し、フィルターエレメント11の外側に付着している濃縮汚泥が剥離されると同時にフィルターエレメント11は洗浄される。 Then, when the vacuum valve 23 closed, the air vent valve 9 to open, is destroyed vacuum in the liquid-collecting chamber 4, the filtrate liquid collecting chamber 4 flows back into the filter element 11, the filter element 11 filter element 11 and at the same time concentrated sludge adhering to the outside is stripped is cleaned. この時、エレメント11が伸縮自在のものを使用しているときはフィルターエレメント11は伸びるから、濃縮汚泥の剥離は物理的力により、より効果的となる。 At this time, since the filter element 11 extends when the element 11 is using those retractable, peeling of the concentrated sludge by physical force, it becomes more effective. この剥離した濃縮汚泥は密閉槽(1)内下方部に沈降し、再び汚泥ポンプ16を作動してろ過工程に入る。 The exfoliated concentrated sludge settles the sealed vessel (1) in the lower portion, into the filtration step by operating the sludge pump 16 again.

【0008】 [0008]

【実施例】本発明の実施例を図1及び図2の例で説明すると、密閉槽1内に汚泥濃縮部3と集液部4とを仕切板2で区画形成し、汚泥濃縮部3内に一端を開放して他端を閉鎖した複数の筒状フィルターエレメント11を仕切板2に垂下配設し、その開放端部を集液部4に連通し、 When the embodiment of EXAMPLES The invention is described in the example of FIGS. 1 and 2, a sealed tank and a sludge concentration portion 3 and the liquid collection portion 4 is defined and formed by the partition plate 2 in 1, the sludge concentrated portion 3 a plurality of cylindrical filter element 11 which closes the other end is opened at one end suspended disposed in the partition plate 2 communicates its open end into the liquid collecting unit 4,
該集液部4にろ液弁7のあるろ液流出管8を設け、前記密閉槽1の汚泥濃縮部3内に汚泥流入弁5のある汚泥流入管6から汚泥を供給し、前記筒状フィルターエレメント11内に透過したろ液を集液部4を経て槽外に流出させて汚泥のろ過濃縮を行う装置において、前記汚泥濃縮部3内上部に連通する空気抜管20と、該空気抜管20 The filtrate outlet pipe 8 with said population liquid portion 4 Niroekiben 7 provided to supply the sludge from the sludge inlet pipe 6 with a sludge inlet valve 5 into the sludge condensing portion 3 of the closed vessel 1, the tubular in the transmitted filtrate in the filter element 11 is flow out to the outside of the vessel through the liquid collection portion 4 by apparatus for performing a filtration enrichment of the sludge, the air extubation 20 communicating with the upper in the sludge concentration unit 3, air extubation 20
に設けた空気抜弁19とを備え、前記集液部4に空気抜弁9を備えた空気抜管10を設けると共に、空気流入弁21を備え、空気源に連なる空気管22と、真空弁23 And an air vent valve 19 provided in, provided with an air extubation 10 having an air vent valve 9 to the liquid collection portion 4, an air inlet valve 21, an air pipe 22 connected to the air source, the vacuum valve 23
を備え真空源に連なる真空管24とを連通配備した構成の汚泥ろ過濃縮装置としてある。 There a sludge filtration apparatus for concentrating configurations deployed communicating the vacuum tube 24 communicating with the vacuum source comprises a.

【0009】前記フィルターエレメント11としては、 [0009] as the filter element 11,
公知の多孔管等の支持体の外周にろ布を巻き付けたもの、中空糸,多孔質セラミックスろ過筒,多孔質の樹脂系ろ過筒等を使用することができるが、コイルスプリング等の弾性支持体で筒状ろ布を支持した伸縮自在の構造のフィルターエレメント11を使用するのが好ましい。 That wound filter cloth on the outer periphery of the support such as a known porous tube, hollow fiber, porous ceramic filtration tube, it is possible to use the porous resin filtration column, etc., the elastic support such a coil spring in it preferred to use a filter element 11 of the telescopic structure supporting the tubular filter cloth.
また、図2のように前記密閉槽1は、汚泥流入管6を、 Further, the hermetic vessel 1 as shown in Figure 2, a sludge inlet pipe 6,
吸込側が原汚泥貯槽15に連なる汚泥ポンプ16の吐出側に連結し、原汚泥貯槽15に貯留された原汚泥を、汚泥ポンプ16にて汚泥流入管6を経て密閉槽1内の汚泥濃縮部3に供給するが、原汚泥を汚泥ポンプ16によって圧入するか、あるいは集液部4がっわを減圧することによって、フィルターエレメント11内外に生じた差圧によりフィルターエレメント11の外側に汚泥が付着し濃縮される一方、ろ液はフィルターエレメント11の内部に透過して集液部4に集められ、ろ液流出管8から流出するようにしてある。 Suction side is connected to the discharge side of the sludge pump 16 connected to the raw sludge storage tank 15, the raw sludge which has been stored in the raw sludge storage tank 15, sludge concentration portion 3 of the closed vessel 1 through the sludge inlet pipe 6 at the sludge pump 16 is supplied to the raw sludge by reducing the pressure to either or liquid collection portion 4 Gawwa pressure with sludge pump 16, the sludge adheres to the outside of the filter element 11 due to the pressure difference generated in the filter element 11 and out while being concentrated, the filtrate is collected in the liquid collecting unit 4 is transmitted through the interior of the filter element 11, there is then to flow out from the filtrate outlet pipe 8.

【0010】なお、濃縮汚泥をフィルターエレメント1 [0010] In addition, the concentrated sludge filter element 1
1から剥離する際に、前述のように集液室4を真空状態にしてから剥離を行うと均等に剥離できるので好ましいが、真空状態にせずにいきなり空気抜弁19を開放するだけでも剥離できる。 Upon the release of 1, but preferably it is possible to uniformly peel Doing peeled from the evacuated liquid-collecting chamber 4, as described above, can be peeled just suddenly opening the air vent valve 19 without a vacuum. この際には、真空弁23,空気抜弁9の操作は必要ではなく閉にしておく。 At this time, the vacuum valve 23, the operation of the air vent valve 9 is kept in the closed not necessary. また、前述の集液室4の真空破壊後に空気抜弁9を閉にし、空気流入弁21を開にして集液部4内に圧力空気又は他から圧力水を導いて逆流するろ液を加圧すれば、濃縮汚泥の剥離が一層効果的に行われる。 Further, the pressure of the filtrate to flow back through the air vent valve 9 after vacuum break of the above liquid-collecting chamber 4 are closed, and then the air inlet valve 21 to the open led pressure water from the pressure air or other liquid collection portion 4 if, separation of the concentrated sludge is further effectively performed. また、真空弁23が閉,空気抜弁9が閉の状態で、空気管22の空気流入弁21を開にすると、減圧状態から一気に加圧状態になり、ろ液がフィルターエレメント11内に急激に逆流するため、最も効率の良い濃縮汚泥の剥離とフィルターエレメント1 Further, the vacuum valve 23 is closed, air vent valve 9 is closed state, when the air inlet valve 21 of air tube 22 is opened, will stretch under pressure from the reduced pressure state, suddenly the filtrate within the filter element 11 to reverse flow, most peeling of efficient concentrated sludge and the filter element 1
1の洗浄が行われる。 1 of the cleaning is performed.

【0011】剥離された濃縮汚泥は、濃縮汚泥排出部1 [0011] peeled concentrated sludge is concentrated sludge discharge section 1
2に沈降するが、一旦濃縮された汚泥はその形状が壊れることなく未濃縮汚泥中を沈降し、またフィルターエレメント11内に逆流し、流出するろ液は微々たる量であるから、未濃縮汚泥をわずかに希釈する程度であり、濃縮汚泥はほとんど希釈されることなく濃縮汚泥排出部1 Although settle into 2, once concentrated sludge settled unconcentrated sludge without the shape is broken, also flows back into the filter element 11, the filtrate flows out from an insignificant amount, unconcentrated sludge the a degree of slightly diluted concentrated sludge discharge unit 1 without the concentrated sludge is hardly diluted
2の底部に堆積し、堆積した濃縮汚泥は、濃縮汚泥排出弁13を開にし、場合によってはポンプを使用することによって濃縮汚泥排出管14から排出される。 Deposited on 2 of the bottom, the deposited concentrated sludge, and a concentrated sludge discharge valve 13 to open, in some cases are discharged from the concentrated sludge discharge pipe 14 by using a pump. なお、濃縮汚泥排出用のポンプとしてはスネークポンプあるいはその他の容積形ポンプを使用すると良い。 Incidentally, it is preferable to use a snake pump or other positive displacement pump as a pump for concentrated sludge discharge. この濃縮汚泥剥離,排出工程としては、濃縮汚泥排出管14から排出される汚泥の濃度を測定して、所定濃度以下になった時あるいは所定時間経過後に終了し、再びろ過濃縮行程に切換えるが、排出汚泥濃度を自動的に測定し自動停止及び切換を可能にすれば便利である。 The concentrated sludge peeled, the discharge step, to measure the concentration of sludge to be discharged from the concentrated sludge discharge pipe 14, terminated or after a predetermined time has elapsed when becomes a predetermined concentration or less, but switched to filtered and concentrated stroke again, if possible the automatic measurement automatically stops and switching the discharge sludge concentration is convenient. かくて、再びろ過濃縮工程が行われるが、汚泥濃縮部3内は、濃縮汚泥の剥離に使われた僅かなろ液と未濃縮汚泥とでほとんど満杯状態となっており、従来のような汚泥充満工程はほとんど必要ない。 Thus, although filtered again concentration step is carried out, the sludge concentration unit 3 is almost a full state in the small filtrate were used to separation of the concentrated sludge and unconcentrated sludge, as in the prior art sludge filled process is almost no need.

【0012】また、剥離されて濃縮汚泥排出部12の底部に沈降,堆積した濃縮汚泥の排出にはフィルターエレメント11の濃縮汚泥の剥離,洗浄を行ったのち、剥離された濃縮汚泥を排出することなく、そのまま各弁を開閉を行い、汚泥ポンプ16を稼動してろ過濃縮工程を再開する。 Further, settle to the bottom of the concentrated sludge discharge portion 12 is peeled off, the deposited separation of concentrated sludge of the filter element 11 to discharge the concentrated sludge, after performing the cleaning, to discharge the peeled concentrated sludge without opens and closes the valves as it resumes filtration concentrating step by operating the sludge pump 16. この時、汚泥濃縮部3内に圧力がかかり、ろ過濃縮が行われると同時に、濃縮汚泥排出弁13を開にすることによって、汚泥濃縮部3内の圧力あるいは必要によりポンプを使用して、沈降,堆積している濃縮汚泥が所定時間連続的に排出させて、1サイクル当たりの所要時間がさらに短縮されるようにすることもできる。 At this time, pressure is applied in the sludge condensing unit 3, and at the same time is filtered and concentrated performed by the concentrated sludge discharge valve 13 is opened, using a pump with pressure or necessary in the sludge condensing unit 3, sedimentation , concentrated sludge being deposited by continuously discharged a predetermined time, it is also possible to make the required time per cycle is further shortened. この場合の濃縮汚泥の排出も、排出汚泥濃度が所定濃度以下になった時に自動停止できるようにすることが好ましい。 Discharge of the concentrated sludge in this case is also discharged sludge concentration it is preferable to be able to automatically stop when it becomes less than a predetermined concentration. なお、前述したようなフィルターエレメント11への酸化物付着による機能低下を防ぐためには、濃縮汚泥剥離排出工程においてフィルターエレメント11を空気と接触させないようにすることが必要であり、そのためには、該工程中ろ液が常に集液部4内に残っているように集液部4の容量を設定することが好ましい。 In order to prevent a decrease function by oxides adhering to the filter element 11 as described above, the filter element 11 it is necessary so as not to contact with air in the concentrated sludge peeling discharge step. For this purpose, the it is preferred that step in the filtrate is always to set the volume of the liquid collection portion 4 as remaining in the liquid collection portion 4. 多くの実験結果によれば、濃縮汚泥の剥離に必要なろ液量は2〜 According to many experiments, the filtrate amount required for peeling of the concentrated sludge is 2
15l/m 2 −エレメント程度であり、また空気圧併用の場合の空気圧は0.5〜2kgf/cm 2程度が最適であった。 15l / m 2 - is about elements, also the air pressure in the case of air pressure combination was optimally about 0.5~2kgf / cm 2.

【0013】さらに、フィルターエレメント11を空気と接触させないための手段としては、図3に示すように、集液部4に水位計25を設け、ろ液水位が集液部4 Furthermore, as means for preventing the filter element 11 in contact with air, as shown in FIG. 3, the water level gauge 25 provided in the liquid collection portion 4, the liquid collecting portion 4 filtrate water level
内LWLで空気流入弁21を閉にし、大気開放とすることができるようにすると良い。 The air inlet valve 21 are closed by the inner LWL, it may be able to be opened to atmosphere. また、図4に示すように、集液部4上部に弾性あるダイヤフラム26を張設して空気室27を形成し、この空気室27に空気源から所定圧力の空気を導くようにすることもでき、その時の空気抜管10はろ液流出管8から分岐させる。 Further, as shown in FIG. 4, the air chamber 27 formed by stretched diaphragm 26 in elastic liquid collection portion 4 top, also possible to guide the air of a predetermined pressure from the air source to the air chamber 27 can diverts from the air extubation 10 halo liquid outflow pipe 8 at that time.

【0014】次に、本発明の装置を使用した場合において、従来例との実験比較をすると、原汚泥としてN浄水場の沈殿池から排泥された表−1の如き性状の汚泥を、 [0014] Next, in the case of using the apparatus of the present invention, when the experiment compared with the conventional example, the sludge such properties in Table 1, which is the waste sludge from the settling basin of N water purification plant as raw sludge,
表−2に示すろ過濃縮装置を使用してろ過濃縮を行った。 Filtration concentrator shown in Table 2 was filtered concentrated using.

【0015】 [0015]

【表1】 [Table 1]

【0016】 [0016]

【表2】 [Table 2]

【0017】また1サイクル当たりの各工程時間は表− [0017] Also, each process time per cycle table -
3の通りとした。 It was as of 3.

【0018】 [0018]

【表3】 [Table 3]

【0019】以上の実験結果を表−4に示す。 [0019] The above experimental results shown in Table 4.

【0020】 [0020]

【表4】 [Table 4]

【0021】次に、濃縮汚泥の排出をろ過濃縮工程中に行った場合、1サイクル当たりの各工程時間を表−5の通りとし、その実験結果は表−6の通りであった。 Next, the case of performing the discharge of concentrated sludge during filtration concentrating step, the respective process time per cycle as shown in Table -5, experimental results were as shown in Table -6.

【0022】 [0022]

【表5】 [Table 5]

【0023】 [0023]

【表6】 [Table 6]

【0024】上述したように、本発明では、濃縮汚泥の剥離,排出に当たって装置内の未濃縮汚泥を原汚泥貯槽に返送することなく、そのまま濃縮汚泥を適確に剥離するものであるから、原汚泥貯槽の容量は従来より大幅に小さくなり、またろ過濃縮に当たって原汚泥を装置内に満杯にする汚泥充満工程も必要なく、濃縮汚泥の排出をろ過濃縮工程中に行うことによりほぼ連続的処理が可能となり、ろ過速度も大幅に向上する。 [0024] As described above, in the present invention, separation of the concentrated sludge, without returning the unconcentrated sludge in the apparatus when discharging the raw sludge storage tank, since it is intended to directly peeling off the concentrated sludge to accurately, raw capacity of the sludge storage tank is made of considerably smaller conventional and sludge filling process to fill in the apparatus of the original sludge when filtered and concentrated need without substantially continuously processed by performing the discharge of concentrated sludge during filtration concentration step possible and will, filtration rate is also greatly improved. さらに、従来法における未濃縮汚泥返送時には、真空によってフィルターエレメント上の濃縮汚泥の剥離や亀裂が発生しないように、濃縮汚泥を厚くしておかねばならず、ろ過速度が極端に悪くなるが、本発明では未濃縮汚泥を返送しないので、濃縮汚泥の厚さが薄くても操作可能であり、ろ過速度をさらに早めることができる。 Further, at the time of unconcentrated sludge return in the conventional method, as peeling and cracking of the thickened sludge on the filter element is not generated by a vacuum, without must keep in thickening the thickened sludge, but the filtration speed is extremely poor, the It does not return the unconcentrated sludge in the invention, even small thickness of the concentrated sludge is operable, it is possible to further accelerate the filtration rate.

【0025】 [0025]

【発明の効果】本発明によれば、従来の密閉槽内の未濃縮汚泥の排出を行うことなく、そのままろ液によるフィルターの濃縮汚泥の剥離を均等で効率良く行い、従来必要とされていた雑時間を大幅に短縮し、実質のろ過時間を短縮し、消費電力その他のランニングコストが低減され、付属する原汚泥貯槽の容量が小さくなり、さらに筒状フィルターエレメントからの濃縮汚泥の剥離時に真空状態にしてから汚泥濃縮部を大気に開放しさらに圧力ガス又は圧力水を併用することにより一層効果的な剥離を可能にすることができ、エレメントに付着した濃縮汚泥の空気による酸化を避けることができて、フィルターエレメントの寿命も大巾に長くすることができる顕著なる効果を奏するものである。 According to the present invention, without performing the discharge of unconcentrated sludge conventional closed vessel, it performs efficiently peeling of concentrated sludge filter according filtrate evenly, which have conventionally been required miscellaneous time was greatly reduced, to reduce the real filtration time, power consumption and other operating costs are reduced, the capacity of the accompanying raw sludge storage tank is reduced, further vacuum at the time of peeling of the concentrated sludge from the cylindrical filter element the sludge concentrating portion from a state may allow for more effective stripping the combined use of further pressure gas or pressure water open to the atmosphere, to avoid oxidation by air of concentrated sludge adhered to the element it can be, but exert a remarkable Naru effect capable life of the filter element also in greatly lengthened.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の実施例を示す縦断面図である。 1 is a longitudinal sectional view showing an embodiment of the present invention.

【図2】図1の例の一使用状態の系統説明図である。 2 is a systematic illustration of an use state of the example of FIG. 1.

【図3】本発明の他の実施例の一部の縦断面図である。 3 is a longitudinal sectional view of a portion of another embodiment of the present invention.

【図4】本発明のさらに他の例の一部の縦断面図である。 4 is a further longitudinal sectional view of a portion of another embodiment of the present invention.

【図5】従来のろ過濃縮装置例の縦断面図である。 5 is a longitudinal sectional view of a conventional filtration concentrator example.

【図6】図5の例の一使用状態の系統説明図である。 6 is a system illustration of an use state of the example of FIG. 5.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 密閉槽 2 仕切板 3 汚泥濃縮部 4 集液部 5 汚泥流入弁 6 汚泥流入管 7 ろ液弁 8 ろ液流出管 9 空気抜弁 10 空気抜管 11 筒状フィルターエレメント 12 濃縮汚泥排出部 13 濃縮汚泥排出弁 14 濃縮汚泥排出管 15 原汚泥貯槽 16 汚泥ポンプ 17 戻し弁 18 戻し管 19 空気抜弁 20 空気抜管 21 空気流入弁 22 空気管 23 真空弁 24 真空管 25 水位計 26 ダイヤフラム 27 空気室 1 closed tank 2 partition plate 3 sludge concentrated portion 4 liquid collection unit 5 sludge inlet valve 6 sludge inlet pipe 7 filtrate valve 8 filtrate outlet pipe 9 air vent valve 10 air extubation 11 cylindrical filter element 12 concentrated sludge discharge portion 13 concentrated sludge discharge valve 14 concentrated sludge discharge pipe 15 raw sludge storage tank 16 the sludge pump 17 return valve 18 return pipe 19 air vent valve 20 air extubation 21 air inlet valve 22 air tube 23 vacuum valve 24 vacuum tube 25 water gauge 26 diaphragm 27 air chamber

───────────────────────────────────────────────────── フロントページの続き (72)発明者 衛藤 正徳 東京都港区港南1丁目6番27号 荏原イ ンフィルコ株式会社内 (56)参考文献 特開 平1−288308(JP,A) ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Masanori Eto Tokyo, Minato-ku, Konan 1-chome No. 6 No. 27 Ebara Lee Nfiruko within Co., Ltd. (56) reference Patent flat 1-288308 (JP, a)

Claims (1)

    (57)【特許請求の範囲】 (57) [the claims]
  1. 【請求項1】 密閉槽1内に汚泥濃縮部3と集液部4とを仕切板2で区画形成し、汚泥濃縮部3内に一端を開放して他端を閉鎖した複数の筒状フィルターエレメント1 1. A a sludge condensing portion 3 and the liquid collection portion 4 is partitioned and formed by the partition plate 2 in the sealed vessel 1, a plurality of cylindrical filter of closing the other open at one end to the sludge condensing unit 3 element 1
    1を仕切板2に垂下配設し、その開放端部を集液部4に連通し、該集液部4にろ液弁7のあるろ液流出管8を設け、前記密閉槽1の汚泥濃縮部3内に汚泥流入弁5のある汚泥流入管6から汚泥を供給し、前記筒状フィルターエレメント11内に透過したろ液を集液部4を経て槽外に流出させて汚泥のろ過濃縮を行う装置において、前記汚泥濃縮部3内上部に連通する空気抜管20と、該空気抜管20に設けた空気抜弁19とを備え、前記集液部4 1 suspended disposed in the partition plate 2 communicates its open end into the liquid collecting unit 4, the filtrate outlet pipe 8 with said population liquid portion 4 Niroekiben 7 provided, the closed vessel 1 Sludge sludge is supplied from the sludge inlet pipe 6 with a sludge inlet valve 5 into the enriching section 3, the tubular filter the transmitted filtrate element 11 via the liquid collection portion 4 is flow out of the tank and filtered and concentrated in sludge an apparatus for performing, with an air extubation 20 communicating with the upper in the sludge concentration section 3, and an air vent valve 19 provided in the air extubation 20, wherein the liquid collection portion 4
    に空気抜弁9を備えた空気抜管10を設けると共に、空気流入弁21を備え、空気源に連なる空気管22と、真空弁23を備え真空源に連なる真空管24とを連通配備したことを特徴とする汚泥ろ過濃縮装置。 Provided with an air extubation 10 having an air vent valve 9, an air inlet valve 21, and wherein the air tube 22 communicating with the air source, that it has deployed communicating the vacuum tube 24 communicating with the vacuum source comprises a vacuum valve 23 sludge filtration concentrator for.
JP6129509A 1994-04-20 1994-04-20 Sludge filtration concentrator Expired - Lifetime JP2668010B2 (en)

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JP4695107B2 (en) * 2007-02-28 2011-06-08 メタウォーター株式会社 Filtration concentration apparatus and filtration concentration method
WO2010150790A1 (en) * 2009-06-23 2010-12-29 メタウォーター株式会社 Suction filtration/concentration method and suction filtration/concentration device
CN101781077A (en) * 2010-02-11 2010-07-21 东华大学 System for vacuum drying sludge by adopting solar energy
CN102531321B (en) * 2011-12-28 2013-11-20 北京科力丹迪技术开发有限责任公司 Sludge water heat drying treatment device and homogeneous reactor thereof
CN102531314B (en) * 2011-12-28 2013-11-20 北京科力丹迪技术开发有限责任公司 Sludge water heat drying treatment device and flashing reactor thereof
CN102531315B (en) * 2011-12-28 2013-11-20 北京科力丹迪技术开发有限责任公司 Sludge hydrothermal drying treating device and hydrothermal reactor thereof
CN102531322B (en) * 2011-12-28 2013-11-13 同济大学 Novel energy-saving sludge drying system

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