JPH02157007A - Method for washing filament filtration column - Google Patents
Method for washing filament filtration columnInfo
- Publication number
- JPH02157007A JPH02157007A JP63308827A JP30882788A JPH02157007A JP H02157007 A JPH02157007 A JP H02157007A JP 63308827 A JP63308827 A JP 63308827A JP 30882788 A JP30882788 A JP 30882788A JP H02157007 A JPH02157007 A JP H02157007A
- Authority
- JP
- Japan
- Prior art keywords
- long fiber
- tower
- water
- fiber bundle
- column
- 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
- 238000001914 filtration Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000005406 washing Methods 0.000 title abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000011001 backwashing Methods 0.000 claims abstract description 27
- 239000007864 aqueous solution Substances 0.000 claims abstract description 17
- 239000000835 fiber Substances 0.000 claims description 67
- 238000004140 cleaning Methods 0.000 claims description 13
- 239000011550 stock solution Substances 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 239000005708 Sodium hypochlorite Substances 0.000 abstract description 12
- 239000007800 oxidant agent Substances 0.000 abstract description 12
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 abstract description 12
- 239000000706 filtrate Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 102100025490 Slit homolog 1 protein Human genes 0.000 description 1
- 101710123186 Slit homolog 1 protein Proteins 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Filtration Of Liquid (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は土工水道水、下水、河川水、湖沼水、凝集沈殿
上澄水、各種工程中間水、製紙工程における回収水のよ
うな各種回収水、各種廃水、生物処理装置の処理水ある
いは有価物含有液、酒、油等の原液中の懸濁物を高流速
で除去するための長繊維束を用いる濾過塔の洗浄方法に
関するもので、特に通常の逆洗工程では差圧が回復しな
い際の洗浄方法に関するものである。[Detailed description of the invention] <Industrial application field> The present invention is applicable to various types of recovered water such as earthwork tap water, sewage, river water, lake water, flocculation sedimentation supernatant water, intermediate water in various processes, and recovered water in paper manufacturing processes. , relates to a filter tower cleaning method using long fiber bundles for removing suspended matter in various wastewaters, treated water from biological treatment equipment, liquids containing valuables, alcohol, oil, etc., at high flow rates. This relates to a cleaning method when the differential pressure does not recover in a normal backwashing process.
〈従来の技術〉 本願出願人は先に長繊維束を用いた濾過塔を開示した。<Conventional technology> The applicant of the present invention previously disclosed a filtration tower using long fiber bundles.
本濾過塔は第1図に示すように濾過塔1の下方部に多孔
板2を横設し、当該多孔板2に後述する長繊維束の支持
体3を取り付け、かつ当該支持体3によって長繊維束4
の下端を固定するとともに、長繊維束4の上端を自由端
とし、長繊維束4を塔内に比較的密に充填することによ
り、濾過塔1内において、長繊維束4を立設したもので
ある。As shown in FIG. 1, this filtration tower has a perforated plate 2 installed horizontally in the lower part of the filtration tower 1, and a support 3 for long fiber bundles, which will be described later, is attached to the perforated plate 2. fiber bundle 4
The long fiber bundle 4 is set upright in the filtration tower 1 by fixing the lower end of the fiber bundle and making the upper end of the long fiber bundle 4 a free end, and filling the tower relatively densely with the long fiber bundle 4. It is.
また長繊維束の支持体3は第2図に示したように、上部
および側胴部に多数の穴15を有する上部蓋状体16と
、側胴部にスリット17を有する上下端が開口した下部
筒状体18とからなり、多孔板2に下記のように取り付
けたものである。Further, as shown in FIG. 2, the long fiber bundle support 3 has an upper lid-like body 16 having a large number of holes 15 in the upper and side body parts, and an upper and lower end having slits 17 in the side body parts. It consists of a lower cylindrical body 18 and is attached to the perforated plate 2 as described below.
すなわち前記下部筒状体18の上方にT字ボルト19を
取り付け、当該T字ポルト19によって下部筒状体18
を懸架し、次いで多孔板2の多孔20の下部より1字ポ
ルト19の先端を差し込んで孔20に下部筒状体18の
上部を挿入した後、脚21を有するナツト22を1字ポ
ルト19にネジ込み脚21によって1字ポルト19を孔
20に固定する。That is, a T-shaped bolt 19 is attached above the lower cylindrical body 18, and the lower cylindrical body 18 is fixed by the T-shaped bolt 19.
Then, after inserting the tip of the 1-shaped port 19 from the bottom of the hole 20 of the perforated plate 2 and inserting the upper part of the lower cylindrical body 18 into the hole 20, the nut 22 having the leg 21 is inserted into the 1-shaped port 19. The 1-shaped port 19 is fixed to the hole 20 by a screw leg 21.
次いであらかじめ前記上部蓋状体16の側胴部の全周囲
に長繊維束4の下端を締め付はハンド23によって固定
しておき、長繊維束4が固定されている上部蓋状体16
の取り付は穴24にT字ボルト19を通して、多孔板2
の多孔20を上部蓋状体16で覆い、次いでナツト25
をT字ボルト19にネジ込むことにより孔20の上部に
上部蓋状体16を固定したものである。Next, the lower end of the long fiber bundle 4 is tightened and fixed in advance around the entire circumference of the side trunk of the upper lid-like body 16 using the hand 23, and the upper lid-like body 16 to which the long fiber bundle 4 is fixed is fixed in advance.
To install the perforated plate 2, insert the T-bolt 19 into the hole 24.
20 is covered with the upper lid-like body 16, and then the nut 25 is closed.
The upper lid-like body 16 is fixed to the upper part of the hole 20 by screwing into the T-shaped bolt 19.
また長繊維束4は太さが10μ〜80μのアクリル繊維
、ポリエステル繊維、ポリアミド繊維等の非撚単繊維の
集合体であって、通常長さが0.4m〜3.0mのもの
を使用する。The long fiber bundle 4 is an aggregate of untwisted single fibers such as acrylic fibers, polyester fibers, and polyamide fibers with a thickness of 10 μm to 80 μm, and usually has a length of 0.4 m to 3.0 m. .
当該濾過塔で懸濁物を含む原液を濾過する、いわゆる濾
過工程は、弁10、弁14を開口して原液流入管5から
原液を流入して長繊維束4の」一端から下端に向かって
原液を下降流で通すもので、このような濾過工程により
、長繊維束4で形成する空隙部で懸濁物が捕捉され、濾
過液は上部蓋状体16に有する穴15から支持体3内部
に入り、次いで下部筒状体18を介して濾過液流出管8
から流出させるものである。In the so-called filtration process in which the stock solution containing suspended matter is filtered in the filter tower, the valve 10 and the valve 14 are opened and the stock solution is introduced from the stock solution inlet pipe 5 from one end to the lower end of the long fiber bundle 4. The stock solution is passed through in a downward flow, and through such a filtration process, suspended matter is captured in the voids formed by the long fiber bundles 4, and the filtrate is passed through the hole 15 in the upper lid-like body 16 into the support body 3. and then through the lower tubular body 18 to the filtrate outflow pipe 8
It is something that flows out from.
このような濾過の続行により長繊維束4の空隙部に懸濁
物が多く捕捉されると、次第に差圧が上昇し、当該差圧
の増大に伴い長繊維束4の下方部から直立している長繊
維束4が屈曲しはじめ、長繊維束4の直立する高さが次
第に減少しで行く現象が生ずる。When a large amount of suspended matter is trapped in the voids of the long fiber bundle 4 due to the continuation of such filtration, the differential pressure gradually increases, and as the differential pressure increases, the suspended matter rises upright from the lower part of the long fiber bundle 4. A phenomenon occurs in which the long fiber bundles 4 begin to bend, and the vertical height of the long fiber bundles 4 gradually decreases.
前記差圧があらかしめ決定しである値となった時点で、
弁10および弁14を閉じ、濾過工程を終了し、以下の
逆洗工程を行って差圧を回復させる。すなわち弁11お
よび弁12を開口して逆洗空気流入管7から圧縮空気を
流入する。When the differential pressure reaches a certain value,
Valve 10 and valve 14 are closed to complete the filtration process and the following backwash process is performed to restore the differential pressure. That is, the valves 11 and 12 are opened to allow compressed air to flow in from the backwash air inflow pipe 7.
多孔板2の下方は濾過液で満たされているので、圧縮空
気の流入により、最初に濾過液が下部筒状体18を介し
て上部蓋状体16の各人15より流出するが、すぐに多
孔板2の下方に第2図に示したごとく液面りが形成され
るとともに、当該液面りの上部に圧縮空気の屑入が形成
され、そして当該液面りより上方に位置するスリット1
7から圧縮空気は下部筒状体18内に入り、次いで上部
蓋状体16の各人15から噴出する。Since the lower part of the perforated plate 2 is filled with filtrate, the filtrate first flows out from each member 15 of the upper lid-like body 16 through the lower cylindrical body 18 due to the inflow of compressed air, but soon As shown in FIG. 2, a liquid level is formed below the perforated plate 2, a compressed air waste trap is formed above the liquid level, and a slit 1 is located above the liquid level.
From 7 the compressed air enters the lower cylindrical body 18 and then blows out from each person 15 of the upper lid-like body 16.
当該圧縮空気の流入により、濾過塔1内の水が撹拌され
るとともに、長繊維束4が振動し、繊維間で形成されて
いた空隙が破壊されて懸濁物の集合物が破壊され、また
長繊維束4に付着していた懸濁物が剥離される。Due to the inflow of the compressed air, the water in the filter tower 1 is stirred, the long fiber bundles 4 are vibrated, the voids formed between the fibers are destroyed, and the aggregates of suspended substances are destroyed. The suspended matter adhering to the long fiber bundle 4 is peeled off.
特に圧縮空気を流入する初期の段階で多孔板2の下方に
存在する液が圧縮空気に一気に押し上げられて勢いの強
いピストン流となって上部蓋状体16の各人15から流
出し、次いで圧縮空気が流出するので、長繊維束4全体
が効果的に洗浄されるものである。Particularly in the initial stage of inflow of compressed air, the liquid existing below the porous plate 2 is pushed up by the compressed air at once, becomes a powerful piston flow, flows out from each member 15 of the upper lid-like body 16, and then is compressed. Since the air flows out, the entire long fiber bundle 4 is effectively cleaned.
上述した圧縮空気の流入を続行したまま、あるいは弁1
2を閉じて圧縮空気の流入を止め、弁13を開口し、逆
洗水流人管9から逆洗水を流入する。流入した逆洗水は
下部筒状体18の下端開口部から当該筒状体18内に入
り、次いで上部蓋状体16の各人15から流出する。Continue the inflow of compressed air as described above, or close valve 1.
2 is closed to stop the inflow of compressed air, the valve 13 is opened, and backwash water flows in from the backwash water flow pipe 9. The inflowing backwash water enters the lower cylindrical body 18 from the lower end opening thereof, and then flows out from each member 15 of the upper lid-shaped body 16.
長繊維束4の下端が固定されているとともに、その上端
が自由端となっているので、逆洗水の上昇流により長繊
維束4は吹き流しのようになって伸長するとともに、各
繊維が振動する。したがって前記圧縮空気の流入による
ショックによって長繊維束4から離脱した前記懸濁物は
洗い流され、当該懸濁物を含む逆洗排水が逆洗排出管6
から流出する。Since the lower end of the long fiber bundle 4 is fixed and its upper end is free, the upward flow of backwash water causes the long fiber bundle 4 to elongate like a windsock, and each fiber vibrates. do. Therefore, the suspended matter separated from the long fiber bundle 4 due to the shock caused by the inflow of the compressed air is washed away, and the backwash water containing the suspended matter is sent to the backwash discharge pipe 6.
flows out from.
なお逆洗工程としては、上述した手順の他に、逆洗水流
人管9より一定量の逆洗水を流入するとともに、逆洗空
気流入管7より間欠的に圧縮空気を流入する手順も行わ
れている。In addition to the above-mentioned steps, the backwashing process also includes a procedure in which a certain amount of backwash water flows in from the backwash water flow pipe 9 and compressed air intermittently flows in from the backwash air inflow pipe 7. It is being said.
上述したような逆洗工程が終了した後、再び前述した濾
過工程を行い、両工程を順次繰り返すものであり、逆洗
工程によって差圧が初期差圧に回復する場合は何の問題
なく運転が続行できる。After the backwashing process as described above is completed, the filtration process described above is performed again, and both processes are repeated in sequence.If the differential pressure recovers to the initial differential pressure by the backwashing process, the operation can be performed without any problem. I can continue.
しかしながら濾過処理を行う原液の種類によっては長期
間運転を続行した場合、前記逆洗工程を実施しても、差
圧が回復しない現象が生ずる。However, depending on the type of stock solution to be filtered, if the operation is continued for a long period of time, the differential pressure may not recover even if the backwashing step is performed.
この原因を調査するために、このような状態となった濾
過塔を解体したところ長繊維束の下方部、特に上部蓋状
体の周囲に存在する長繊維束に比較的粘着性の強い微生
物のスライムと思われる付着物が多量に付着しているこ
とが判明した。In order to investigate the cause of this, we dismantled the filter tower in this condition, and found that relatively sticky microorganisms were present in the lower part of the long fiber bundles, especially around the upper lid. It was found that a large amount of what appeared to be slime was attached.
当該付着物は比較的粘着性が強いため、前述した圧縮空
気およびまたは逆洗水による洗浄では良好に剥離するこ
とができないものと思われるが、前述したように逆洗工
程によって差圧が回復しないと濾過時間が短くなり甚だ
好ましくない。Since the adhesion is relatively sticky, it seems that it cannot be removed well by cleaning with compressed air and/or backwash water as described above, but as mentioned above, the differential pressure does not recover by the backwashing process. This shortens the filtration time, which is extremely undesirable.
〈発明が解決しようとする問題点〉
本発明は長繊維束濾過塔において、圧縮空気およびまた
は逆洗水を用いる逆洗工程を実施しても、差圧が回復し
ない際に、当該差圧を回復させることができる洗浄方法
を提供することを目的とする。<Problems to be Solved by the Invention> The present invention solves the problem of reducing the differential pressure in a long fiber bundle filtration tower when the differential pressure does not recover even after performing a backwash step using compressed air and/or backwash water. The purpose is to provide a cleaning method that allows recovery.
〈問題点を解決するための手段〉
上記目的を実現するためになされた本発明よりなる長繊
維束濾過塔の洗浄方法は、塔の内部に長繊維束の下端を
固定するとともに、その上端を自由端として、塔内部全
体に長繊維束を立設した濾過塔の上方から原液を流入し
て、長繊維束の上端から下端に向かって原液を通すこと
により、長繊維束内の空隙部で懸濁物を捕捉する濾過工
程と、長繊維束の下方部から圧縮空気およびまたは逆洗
水を流入して前記捕捉された懸濁物を塔外に排出する逆
洗工程とを繰り返して行う長繊維濾過塔において、上記
逆洗工程を行っても濾過塔の差圧が回復しない際に、5
0℃以上の熱水およびまたは酸化剤の水溶液を塔内の長
繊維束に接触させることを特徴とする長繊維濾過塔の洗
浄方法である。<Means for Solving the Problems> In order to achieve the above object, the method for cleaning a long fiber bundle filtration tower according to the present invention fixes the lower end of the long fiber bundle inside the tower, and fixes the upper end of the long fiber bundle inside the tower. The raw solution is introduced from above the filtration tower in which long fiber bundles are installed upright throughout the inside of the tower as the free end, and the raw solution is passed from the upper end of the long fiber bundles to the lower end. A filtration step for capturing suspended matter and a backwashing step for flowing compressed air and/or backwash water from below the long fiber bundle and discharging the captured suspended matter outside the column are repeated. In the fiber filtration tower, when the differential pressure of the filtration tower does not recover even after performing the above backwashing step, 5
This method of cleaning a long fiber filtration tower is characterized by bringing hot water at 0° C. or higher and/or an aqueous solution of an oxidizing agent into contact with long fiber bundles in the tower.
以下に本発明の詳細な説明する。The present invention will be explained in detail below.
〈作用〉
本発明者等は長繊維束濾過塔を長期間運転した際に、長
繊維束の下方部、特に上部蓋状体の周囲の長繊維束に付
着する粘着性の強い付着物を効果的に除去することがで
きる洗浄方法について検討したところ、当該長繊維束を
50℃以上の熱水およびまたは酸化剤の水溶液に接触さ
せると、前記付着物の粘着性が低下し、通常の圧縮空気
およびまたは逆洗水を用いる逆洗工程で容易に剥離可能
な形態に変質することを知見した。<Function> The present inventors have found that when a long fiber bundle filtration tower is operated for a long period of time, the highly adhesive deposits that adhere to the lower part of the long fiber bundle, especially around the upper lid-shaped body, can be effectively removed. When we investigated a cleaning method that could remove the deposits, we found that when the long fiber bundles were brought into contact with hot water at 50°C or higher and/or an aqueous solution of an oxidizing agent, the stickiness of the deposits decreased, and when the long fiber bundles were brought into contact with hot water at 50°C or higher and/or an aqueous solution of an oxidizing agent, It has been found that the deterioration occurs in a form that can be easily peeled off during a backwashing process using backwash water.
熱水を用いる場合は、50℃以下の熱水では効果がなく
50℃以上の熱水を必要とするが、あまり高い温度とす
ると長繊維束あるいは濾過塔内構造物が熱により劣化す
る可能性もあるので、50℃以上80℃以内の熱水が好
ましく、通常は60°C〜70℃の熱水を用いる。また
当該熱水の接触時間としては少なくとも30分以上とし
、3時間前後接触させることが好ましい。When using hot water, hot water of 50°C or lower is ineffective, and hot water of 50°C or higher is required; however, if the temperature is too high, the long fiber bundles or the internal structure of the filter tower may deteriorate due to heat. Therefore, hot water with a temperature of 50°C or more and 80°C or less is preferable, and hot water of 60°C to 70°C is usually used. Further, the contact time of the hot water is at least 30 minutes or more, and preferably about 3 hours.
なお接触させる具体的方法としては、濾過塔内の水を熱
水に置換した後、放置してもよいし、濾過塔に熱水を上
昇流あるいは下降流で流してもよい。In addition, as a specific method of contacting, the water in the filtration tower may be replaced with hot water and then left to stand, or the hot water may be flowed into the filtration tower in an upward or downward flow.
また酸化剤の水溶液を用いる場合、酸化剤としては次亜
塩素酸ナトリウム、過酸化水素、オゾン等を用いること
ができ、これらの酸化剤の濃度としては2%(重量%、
以後同様)前後とすることが好ましい。In addition, when using an aqueous solution of an oxidizing agent, sodium hypochlorite, hydrogen peroxide, ozone, etc. can be used as the oxidizing agent, and the concentration of these oxidizing agents is 2% (wt%,
The same applies hereafter) It is preferable to make it before and after.
なお当該酸化剤の接触時間は熱水の場合と同様に少なく
とも30分以上とし、3時間前後接触させることが好ま
しい。Note that the contact time with the oxidizing agent is at least 30 minutes or more, as in the case of hot water, and preferably about 3 hours.
なお熱水のみあるいは酸化剤の水溶液のみを前述の条件
で長繊維束に接触させることにより所期の目的を達成で
きるが、熱水と酸化剤の水溶液の両者を接触させたり、
あるいは50℃以上に加熱した酸化剤の水溶液を接触さ
せた方がより効果的である。Note that the desired purpose can be achieved by bringing only hot water or an aqueous solution of an oxidizing agent into contact with the long fiber bundle under the conditions described above;
Alternatively, it is more effective to contact with an aqueous solution of an oxidizing agent heated to 50° C. or higher.
またこのような熱水およびまたは酸化剤の水溶液を長繊
維束に接触させながら空気でバブリングするとさらに効
果的である。Further, it is more effective to bubble the hot water and/or the aqueous solution of the oxidizing agent with air while contacting the long fiber bundle.
酸化剤の水溶液を用いる場合を例にして以下にその具体
的手順を第1図および第2図を用いて説明する。The specific procedure will be described below with reference to FIGS. 1 and 2, taking as an example the case where an aqueous solution of an oxidizing agent is used.
すなわち圧縮空気およびまたは逆洗水を用いる前述の逆
洗工程が終了した後、濾過塔1内に水を満たした状態と
しておき、弁10および弁14を開け、原液流入管5か
ら約2%の次亜塩素酸ナトリウム水溶液を濾過塔1内に
流入し、濾過塔1の特に多孔板2の上方の水を前記次亜
塩素酸ナトリウム水溶液に置換する。That is, after the above-mentioned backwashing process using compressed air and/or backwash water is completed, the filter tower 1 is filled with water, valves 10 and 14 are opened, and approximately 2% of A sodium hypochlorite aqueous solution flows into the filter tower 1, and the water in the filter tower 1, particularly above the perforated plate 2, is replaced with the sodium hypochlorite aqueous solution.
なお原液流入管5から約2%の次亜塩素酸ナトリウム水
溶液を流入するのに変えて、濾過塔1内に水を満たした
まま、原液流入管5あるいは濾過塔1の上部に付設した
マンホール(図示せず)から次亜塩素酸ナトリウム原液
を少量添加し、濾過塔1内の水で希釈された場合、濾過
塔l内の次亜塩素酸ナトリウムの濃度が約2%になるよ
うにしても差し支えない。In addition, instead of injecting the approximately 2% sodium hypochlorite aqueous solution from the stock solution inflow pipe 5, the manhole ( If a small amount of sodium hypochlorite stock solution (not shown) is added and diluted with water in the filtration tower 1, the concentration of sodium hypochlorite in the filtration tower 1 will be approximately 2%. No problem.
このように濾過塔1内に次亜塩素酸ナトリウム溶液を満
たした後、弁10、弁14を閉じ、弁12および弁11
を開口し、逆洗空気流入管7より圧縮空気を間欠的に流
入しながら約3時間程度放置する。After filling the filter tower 1 with the sodium hypochlorite solution in this way, the valves 10 and 14 are closed, and the valves 12 and 11 are closed.
is opened and left for about 3 hours while compressed air is intermittently introduced from the backwash air inflow pipe 7.
次いで弁11の開口はそのままで弁13を開口して逆洗
水流人管9から逆洗水を流入し、塔内の次亜塩素酸ナト
リウムおよび長繊維束4から2111%illした付着
物を逆洗水排出管6から流出させる。Next, the valve 13 is opened while the valve 11 remains open, and backwash water flows in from the backwash water flow pipe 9 to remove 2111% of the deposits from the sodium hypochlorite and long fiber bundles 4 in the tower. It is made to flow out from the wash water discharge pipe 6.
以上が本発明の洗浄方法のひとつの手順であり、本発明
の洗浄により粘着性の比較的強い付着物は完全に洗い出
すことができ、以後は差圧が回復するので、前述した濾
過工程と、圧縮空気およびまたは逆洗水を用いる逆洗工
程とで運転を続行することができる。The above is one of the steps of the cleaning method of the present invention. By the cleaning of the present invention, relatively strong adhesion can be completely washed out, and the differential pressure is restored thereafter, so the above-mentioned filtration step, Operation can be continued with a backwash step using compressed air and/or backwash water.
またさらに運転を続行することにより再び差圧が回復し
なかった際には、その都度、本発明の洗浄方法を実施す
ればよい。Further, if the differential pressure does not recover again by continuing the operation, the cleaning method of the present invention may be carried out each time.
〈効果〉
以上説明したごとく、長繊維束濾過塔において、圧縮空
気およびまたは逆洗水を用いる逆洗工程を実施しても差
圧が回復しない際に、本発明の洗浄方法を実施すること
により長繊維束に付着している比較的粘着性の強い付着
物を完全に取り除くことができるので、以後は初サイク
ルと同様な差圧となり何の問題なく長繊維濾過塔を運転
することができる。<Effects> As explained above, in a long fiber bundle filtration tower, when the differential pressure does not recover even if the backwash step using compressed air and/or backwash water is performed, by implementing the cleaning method of the present invention. Since the relatively sticky deposits adhering to the long fiber bundle can be completely removed, the pressure difference is the same as in the first cycle, and the long fiber filtration tower can be operated without any problem.
また本発明の洗浄方法は濾過塔を解体することがなく、
比較的簡単な操作なので、自動操作も容易に行うことが
できるという利点を有する。Furthermore, the cleaning method of the present invention does not require dismantling the filter tower.
Since the operation is relatively simple, it has the advantage that automatic operation can be performed easily.
以下に本発明の効果を明確にするために実施例を説明す
る。Examples will be described below to clarify the effects of the present invention.
実施例−1
直径100R1直線部高さ2,000mmのステンレス
スチール製の濾過塔の下部に多孔板を横設し、当該多孔
仮に第2図に示したと同じ長繊維束の支持体を用いて太
さ35μ、長さ1,5001m。Example 1 A perforated plate was installed horizontally at the bottom of a stainless steel filtration tower with a diameter of 100 R and a straight part height of 2,000 mm. The length is 35μ and the length is 1,5001m.
充填密度75kg/mのアクリル製非撚単繊維の集合体
からなる長繊維束の下端を固定し、上端を自由端とした
。The lower end of a long fiber bundle made of an aggregate of non-twisted acrylic single fibers with a packing density of 75 kg/m was fixed, and the upper end was used as a free end.
当該濾過塔の上方から濾過工程として下降流で製紙工場
の総合排水を凝集沈殿処理した上澄水(懸濁物質濃度3
0〜40■/l)を原水とし、LV50m/Hで濾過し
たところ、初期差圧は0.1kg / crA Gであ
り懸濁物質濃度1■/7!の濾過水が得られた。The supernatant water (suspended solids concentration 3
When the raw water was filtered at LV50m/H, the initial pressure difference was 0.1 kg/crA G and the suspended solids concentration was 1/7! of filtered water was obtained.
差圧がl、 Q kg / ct Gとなった時点で濾
過工程を止め、濾過塔の下部から上昇LVI、0OON
rn’/rrlの圧縮空気を1分間、次に圧縮空気(l
、00ONnr/r4)と上昇LV100m/Hの逆洗
水を3分間、さらに上昇LV100m/Hの逆洗水のみ
で1分間逆洗する逆洗工程を行い、以後は前記濾過工程
と逆洗工程を繰り返した。The filtration process is stopped when the differential pressure reaches 1, Q kg/ct G, and the LVI rises from the bottom of the filtration tower, 0OON.
compressed air of rn'/rrl for 1 minute, then compressed air (l
, 00ONnr/r4) and backwash water with a rising LV of 100 m/H for 3 minutes, and a backwashing process of backwashing only with backwash water with a rising LV of 100 m/H for 1 minute, and then the filtration process and the backwashing process. repeated.
当該濾過工程と逆洗工程を長期間繰り返して実施してい
たところ、逆洗工程を実施しても初期差圧が0.2kg
/cdGに上昇したので、濾過塔内の水を2%の次亜塩
素酸ナトリウム水溶液に置換するとともに、約30分間
エアバブリングを行い、次いで3時間放置し、その後逆
洗水で次亜塩素酸ナトリウム水溶液を洗浄し、通常の逆
洗工程を行った。その後、同じ原水を同じ条件で濾過処
理したところ、初期差圧は0.1 kg/cA Gに回
復した。When the filtration process and backwashing process were repeated for a long period of time, the initial differential pressure was 0.2 kg even after the backwashing process.
/cdG, so the water in the filtration tower was replaced with a 2% sodium hypochlorite aqueous solution, air bubbled for about 30 minutes, then left to stand for 3 hours, and then backwashed water was used to remove hypochlorous acid. The sodium aqueous solution was washed out and a normal backwashing process was performed. Thereafter, when the same raw water was filtered under the same conditions, the initial differential pressure was restored to 0.1 kg/cA G.
実施例−2
実施例−1に引き続き、濾過工程と逆洗工程を長期間繰
り返したところ、逆洗工程を実施しても初期差圧が再び
0.2 kg/ csA Gに上昇したので、濾過塔の
下部から70°Cの熱水を上昇LV20m/Hで約1時
間流入することにより長繊維束を熱水に接触させ、次い
で通常の逆洗工程を行った後、同じ原水を同じ条件で濾
過処理したところ、初期差圧は0.1kg/c♂Gに回
復した。Example 2 Following Example 1, when the filtration process and backwashing process were repeated for a long period of time, the initial differential pressure rose again to 0.2 kg/csA G even after the backwashing process, so the filtration process The long fiber bundles were brought into contact with the hot water by flowing hot water at 70°C from the bottom of the tower at an ascending LV of 20 m/h for about 1 hour, followed by a normal backwashing process, followed by the same raw water under the same conditions. After the filtration treatment, the initial pressure difference was restored to 0.1 kg/c♂G.
第1図は本発明に用いる長繊維束濾過塔のフローを示す
説明図であり、第2図は濾過塔に用いる長繊維束の支持
体を示す拡大断面図である。
1・・・濾過塔 2・・・多孔板3・・・
長繊維束の支持体 4・・・長繊維束5・・・原液流
入管 6・・・逆洗排出管7・・・逆洗空気流
入管 8・・・濾過液流出管9・・・逆洗水流入管
10〜14・・・弁15・・・穴
16・・・」二部蓋状体17・・・スリット
18・・・下部筒状体I9・・・T字ボルト
20・・・孔21・・・脚 22・・・
ナツト23・・・締め付はバンド 24・・・取り付
は穴25・・・ナンドFIG. 1 is an explanatory diagram showing the flow of a long fiber bundle filtration tower used in the present invention, and FIG. 2 is an enlarged sectional view showing a support for the long fiber bundle used in the filtration tower. 1... Filter tower 2... Perforated plate 3...
Support for long fiber bundle 4... Long fiber bundle 5... Stock solution inflow pipe 6... Backwash discharge pipe 7... Backwash air inflow pipe 8... Filtrate outflow pipe 9... Reverse Washing water inflow pipe 10-14... Valve 15... Hole
16..." two-part lid-like body 17... slit
18...Lower cylindrical body I9...T-shaped bolt
20...hole 21...leg 22...
Nut 23... Tighten with band 24... Mount with hole 25... Nand
Claims (1)
端を自由端として、塔内部全体に長繊維束を立設した濾
過塔の上方から原液を流入して、長繊維束の上端から下
端に向かって原液を通すことにより、長繊維束内の空隙
部で懸濁物を捕捉する濾過工程と、長繊維束の下方部か
ら圧縮空気およびまたは逆洗水を流入して前記捕捉され
た懸濁物を塔外に排出する逆洗工程とを繰り返して行う
長繊維濾過塔において、上記逆洗工程を行っても濾過塔
の差圧が回復しない際に、50℃以上の熱水およびまた
は酸化剤の水溶液を塔内の長繊維束に接触させることを
特徴とする長繊維濾過塔の洗浄方法。The lower end of the long fiber bundle is fixed inside the tower, and the upper end is set as a free end, and the raw solution is introduced from above the filtration tower in which the long fiber bundle is set upright throughout the inside of the tower, from the upper end of the long fiber bundle to the lower end. A filtration step in which suspended matter is captured in the voids within the long fiber bundle by passing the stock solution toward the target, and compressed air and/or backwash water is introduced from the lower part of the long fiber bundle to trap the suspended matter in the voids within the long fiber bundle. In long-fiber filtration towers that repeatedly undergo a backwashing process to discharge turbid substances to the outside of the tower, when the differential pressure in the filtration tower does not recover even after performing the above backwashing process, hot water of 50°C or higher and/or oxidation A method for cleaning a long fiber filtration tower, the method comprising bringing an aqueous solution of an agent into contact with long fiber bundles in the tower.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63308827A JP2965571B2 (en) | 1988-12-08 | 1988-12-08 | Cleaning method for long fiber filtration tower |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63308827A JP2965571B2 (en) | 1988-12-08 | 1988-12-08 | Cleaning method for long fiber filtration tower |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02157007A true JPH02157007A (en) | 1990-06-15 |
JP2965571B2 JP2965571B2 (en) | 1999-10-18 |
Family
ID=17985782
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63308827A Expired - Lifetime JP2965571B2 (en) | 1988-12-08 | 1988-12-08 | Cleaning method for long fiber filtration tower |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2965571B2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0621704U (en) * | 1992-08-18 | 1994-03-22 | 京都機械株式会社 | Backwashable filtration device |
JP2001276517A (en) * | 2000-03-30 | 2001-10-09 | Japan Organo Co Ltd | Washing method for filter tower |
JP2008142597A (en) * | 2006-12-07 | 2008-06-26 | Japan Organo Co Ltd | Filtering apparatus and filtering method |
CN101837208A (en) * | 2010-03-29 | 2010-09-22 | 上海凡清环境工程有限公司 | Method and device for filtering upward-flow fiber bundle |
CN102068870A (en) * | 2010-12-02 | 2011-05-25 | 北京机电院高技术股份有限公司 | Complete sludge paddle anhydrated carrier gas treatment device and method |
JP2013000629A (en) * | 2011-06-14 | 2013-01-07 | Japan Organo Co Ltd | Backwashing method of long-fiber filtering device, and backwashing device of long-fiber filtering device |
JP2014079692A (en) * | 2012-10-16 | 2014-05-08 | Japan Organo Co Ltd | Backwash method of long fiber filtration device |
CN106823528A (en) * | 2017-02-23 | 2017-06-13 | 天津大学 | Using the filter method and device of soft fiber Shu Gaishan water quality |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5214973A (en) * | 1975-07-26 | 1977-02-04 | Nobutsugu Ishii | Method for cleaning filter cloth |
JPS54124374A (en) * | 1978-03-02 | 1979-09-27 | Chemap Ag | Method of filtering liquid and gas by brush type filter and its device |
JPS6380896A (en) * | 1986-09-25 | 1988-04-11 | Japan Organo Co Ltd | Treatment of blow water from powder plant |
-
1988
- 1988-12-08 JP JP63308827A patent/JP2965571B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5214973A (en) * | 1975-07-26 | 1977-02-04 | Nobutsugu Ishii | Method for cleaning filter cloth |
JPS54124374A (en) * | 1978-03-02 | 1979-09-27 | Chemap Ag | Method of filtering liquid and gas by brush type filter and its device |
JPS6380896A (en) * | 1986-09-25 | 1988-04-11 | Japan Organo Co Ltd | Treatment of blow water from powder plant |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0621704U (en) * | 1992-08-18 | 1994-03-22 | 京都機械株式会社 | Backwashable filtration device |
JP2001276517A (en) * | 2000-03-30 | 2001-10-09 | Japan Organo Co Ltd | Washing method for filter tower |
JP2008142597A (en) * | 2006-12-07 | 2008-06-26 | Japan Organo Co Ltd | Filtering apparatus and filtering method |
CN101837208A (en) * | 2010-03-29 | 2010-09-22 | 上海凡清环境工程有限公司 | Method and device for filtering upward-flow fiber bundle |
CN102068870A (en) * | 2010-12-02 | 2011-05-25 | 北京机电院高技术股份有限公司 | Complete sludge paddle anhydrated carrier gas treatment device and method |
JP2013000629A (en) * | 2011-06-14 | 2013-01-07 | Japan Organo Co Ltd | Backwashing method of long-fiber filtering device, and backwashing device of long-fiber filtering device |
JP2014079692A (en) * | 2012-10-16 | 2014-05-08 | Japan Organo Co Ltd | Backwash method of long fiber filtration device |
CN106823528A (en) * | 2017-02-23 | 2017-06-13 | 天津大学 | Using the filter method and device of soft fiber Shu Gaishan water quality |
Also Published As
Publication number | Publication date |
---|---|
JP2965571B2 (en) | 1999-10-18 |
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