WO1989006154A1 - Agglutination reaction vessel - Google Patents
Agglutination reaction vessel Download PDFInfo
- Publication number
- WO1989006154A1 WO1989006154A1 PCT/JP1988/001321 JP8801321W WO8906154A1 WO 1989006154 A1 WO1989006154 A1 WO 1989006154A1 JP 8801321 W JP8801321 W JP 8801321W WO 8906154 A1 WO8906154 A1 WO 8906154A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tank
- cylindrical
- filtration
- cylindrical tank
- stirring blade
- Prior art date
Links
- 230000004520 agglutination Effects 0.000 title abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 51
- 238000001914 filtration Methods 0.000 claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims abstract 2
- 239000010802 sludge Substances 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 230000015271 coagulation Effects 0.000 claims description 5
- 238000005345 coagulation Methods 0.000 claims description 5
- 238000005054 agglomeration Methods 0.000 claims description 3
- 230000002776 aggregation Effects 0.000 claims description 3
- 238000013019 agitation Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 10
- 239000000701 coagulant Substances 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 235000007516 Chrysanthemum Nutrition 0.000 description 1
- 244000189548 Chrysanthemum x morifolium Species 0.000 description 1
- 206010012289 Dementia Diseases 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/03—Processes of filtration using flocculating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
- B01D29/035—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting with curved filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
- B01D29/036—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting ring shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/44—Edge filtering elements, i.e. using contiguous impervious surfaces
- B01D29/46—Edge filtering elements, i.e. using contiguous impervious surfaces of flat, stacked bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
- B01D29/86—Retarding cake deposition on the filter during the filtration period, e.g. using stirrers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
- B01D29/902—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding containing fixed liquid displacement elements or cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/94—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
- B01D29/945—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes for continuously discharging concentrated liquid
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/44—Edge filtering elements, i.e. using contiguous impervious surfaces
- B01D29/445—Bar screens
Definitions
- sludge supplied to a tank together with a flocculant is stirred by a rotary stirring means having stirring blades to generate a floc having sufficient strength even if the supplied sludge has a low concentration.
- a coagulation reaction tank capable of Kitakage
- such a coagulation reaction tank is provided with a cylindrical tank, and a sludge and a flocculant vertically provided in the center of the cylindrical tank and supplied into the tank.
- a rotary stirring means provided with stirring blades for stirring and flocking, and provided concentrically at the upper part in the cylindrical tank, and receives the liquid in the tank by filtering it from the bottom from the bottom.
- a filtration tank is provided concentrically on the upper part of the cylindrical tank, and a horizontal multi-stage slit on the outer peripheral wall of the filtration tank is provided.
- a coagulation reaction tank (second conventional example) in which the liquid in a cylindrical tank is filtered and received from the tank, and the liquid is drained out of the cylindrical tank.
- agglutination reaction tank (third conventional example) that takes out the solution is also known from Japanese Utility Model Application Laid-Open No. 61-810 / 81.
- the filtrate which hardly blocks the filtration from the inside of the filtration tank, to the outside of the tank; and to extract a block having sufficient strength from the cylindrical tank.
- the bottom of the first conventional filtration tank is made of a punching plate or netting material, it can be used for punching plates with fine blocks and fine fibrous substances contained in sludge. Closes the holes in the mesh and the mesh of the net material, causing clogging.
- a wiper such as a brush or a rubber plate that swivels in contact with the upper and lower surfaces of the bottom of the heating tank is attached to the rotating shaft of the stirring means to clean the bottom of the filtration tank.
- a wiper such as a brush or a rubber plate that swivels in contact with the upper and lower surfaces of the bottom of the heating tank is attached to the rotating shaft of the stirring means to clean the bottom of the filtration tank.
- the fine multi-stage slits on the outer peripheral wall of the filtration tank are blocked by fine flocks and fine fibrous substances contained in sludge, causing clogging. Therefore, a brush that rubs the inner surface of the outer peripheral wall against the rotation of the agitating means is radially attached to prevent clogging, but a textile material is entangled with this brush, and a sufficient cleaning effect is similarly obtained. Can not.
- the filtration tank is provided in a cylindrical tank, the bottom of which is located above the swirling area of the stirring blade, and the liquid in the cylindrical tank is provided at the bottom of the filtration tank.
- a slit for filtering the water is provided in an arc shape concentric with the cylindrical tank, and the upper edge of the stirring blade is close to the lower surface of the bottom of the filter tank.
- the filtration tank is provided outside the outer periphery of the upper part of the tank wall of the cylindrical tank, and the liquid in the cylindrical tank is provided on the upper part of the wall of the cylindrical tank surrounded by the filtration tank.
- a slit for filtering the water into a filtration tank is provided horizontally, and the outer edge of the stirring blade is close to the upper inner periphery of the tank wall of the cylindrical tank.
- FIG. 1 shows an embodiment of the agglutination reaction tank according to claim 1 of the present invention.
- FIG. 2 is a perspective view in which a part of a cylindrical tank is cut off.
- FIG. 2 is a plan view of FIG. The figure is the same Claims: No.
- FIG. 4 is a partially cut-away view of the cylindrical tank showing an example of the agglutination reaction tank in section 2, and
- FIG. 4 is an enlarged side view of a main part. '' Best mode for carrying out troubles The invention will be described based on the drawings.
- 1 is a cylindrical tank
- 2 is a vertical stirring means which is vertically installed at the center of the tank 1 and is rotated by a motor and a transmission
- 3 and 4 are sludge and a collecting agent.
- a mud pipe and a chemical injection pipe to be supplied to the bottom of the tank are shown.
- the rotation ⁇ 2 ′ of the rotary stirring means is 180 in each of the upper and lower two stages.
- the stirring blades 6a and 6b are attached radially at the phase of.
- FIGS. 1 and 2 show an embodiment of claim 1 in which the filtration tank is slightly smaller than a semicircle along the inner circumference of the cylindrical tank 1 along a circular portion having the same curvature. Is provided. The upper end of the germ tank 7 and the upper end of the cylindrical tank 1 are at the same level, and the bottom 7 'of the filtration tank 7 is located only 5 to 20 farms above the upper edge of the upper stirring blade 6a. Not approaching.
- a circular slit 8 concentric with the cylindrical tank 1 is provided on the bottom 7 '. The width of the slit 8 is 5 or less, preferably about 1 to 2 a, and the interval between the slits adjacent to each other in the radial direction is about 5 M.
- the interval at which the slits are displaced in the circumferential direction is about two.
- a water pipe 9 is provided for draining the condensed water from the filtration tank 7 to the outside of the tank through the tank wall of the cylindrical tank 1.
- the sludge and coagulant supplied to the center of the bottom of the cylindrical tank from the mud supply pipe 3 and the chemical injection pipe 4 stay in the tank while the stirring blades 6 a and 6 of the rotary stirring means 2 are kept.
- the mixture is uniformly mixed and reacted by the stirring action of b.
- the water that enters the inside of the filtration tank 7 through the slit 8 at the bottom is removed from the water pipe 9 by a pump, etc.
- the sludge supplied is concentrated sufficiently to form a strong floc and is discharged from the mud pipe 5 and, for example, goes to a dehydrator.
- the upper stirring blade * 6 a swirls to generate a horizontal swirling flow, and the slit 8 provided at the bottom of the filtration tank 7 Concentric block and fibrous substance in the liquid flow under the bottom 7 'in the same direction as the slit, so that they may not be caught by the slit. Notwithstanding, the flocculated flocs roll under the bottom, making them 3 ⁇ 4 denser and stronger.
- the upper stage of the stirring blade 6a is a flat plate with a constant width in the vertical direction over the entire length from the base fixed to the rotating shaft 2 'to the tip as shown in the figure, and the lower stage stirring blade 6b is about half of the total length.
- the base 10 on the side attached to the rotating shaft 2 ' has a narrow vertical radiation, while the remaining free end 11 has a wide vertical radiation. I prefer to do that.
- the blade-shaped stirring blade pushes water outward at the wide free end 11, and the flow rises near the inner circumference of the cylindrical tank while swirling.
- the rising b is descended toward the center in contact with the horizontal swirl by the flat plate stirring blade, and the falling b is at the center along the bottom.
- swirling up and down circulating flows occur at the center and bottom of the cylindrical tank, and the sludge and coagulant supplied to the center of the bottom of the tank ride on these flows b and b '.
- the flocculated floc and the chrysanthemum formed at the same time come into good contact with each other and coagulate well.
- the wide free end 11 is bent (for example, 45 °) so as to recede with respect to the turning direction of the blade, the free end pushes the water toward the inner periphery of the tank.
- the rotation speed of the rotating shaft is 40 RPM
- the length of the upper flat plate stirring blade 6a is 20ca
- the width in the vertical direction is 8cm
- the lower blade stirring blade 6b is the base 10 in length 10c Fiber
- the width in the vertical direction is 4 c-fiber
- free end 11 length 10c is 4 c-fiber
- peripheral speed of both agitating blades 50m / min sludge residence time 10min
- horizontal cross-sectional area of filter tank is horizontal cross-sectional area of tank
- the opening area of the slit is 28.6% of the horizontal cross-sectional area of the furnace
- the immersion depth of the filtration tank is 5 CB below the water surface
- the upper plate stirring blades The spacing at the bottom of the filtration tank was 1 cn
- the width of the circular slit was 211 «. During the operation period, no clogging occurred in the circular slit at the bottom of the washing tank, and no adhesion of fibrous substances occurred.
- a control tank 7 is installed as a fixed device in the cylindrical tank 1, and the filtered water that enters the cylinder through the circular slit 8 at the bottom is pumped through a tap water pipe 9 that penetrates the tank wall.
- Filtration tank 7 may be made of a stainless steel plate separately from cylindrical tank 1, and its round part has hanging brackets that are hooked on the edge of the cylindrical tank from above. It is also possible to attach 14 and hang it in a cylindrical tank with the hanging metal fittings 14. In this case, the liquid that has entered the furnace tank can be siphoned out of the tank.
- FIGS. 3 and 4 show one example of the sieving reaction tank of claim 2 which differs from the actual filtration of FIGS. 1 and 2 above.
- condition tank 7 is provided on the outer periphery of the upper part of the tank wall of the cylindrical tank over almost half the circumference of the cylindrical tank. Of course, it is provided on the entire circumference of the cylindrical tank, and the cylindrical tank is You can surround the tank.
- the free end of the stirring blade 6a without the outer edge is brought close to the inner periphery of the tank wall of the cylindrical tank having the slit 15 at an interval of about 5 to 20 fibers, and if necessary, the outer edge is '
- the rubber plate may be attached, and the inner periphery of the tank wall of the cylindrical tank may be stroked with this rubber plate during rotation.
- the vertical width of the slits, j, and 15 is 5 fibers or less, preferably about 1 to 2 nil, and the vertical interval between the upper and lower slits is 5 It is about.
- the sludge and coagulant supplied to the center of the inner bottom of the cylindrical tank from the mud pipe 3 and the chemical injection pipe 4 are retained in the tank while the stirring blades of the rotary stirring means are used. 6a and 6b agitate to uniformly mix and react, but the water that enters the inside of the dementia tank 7 through the slit 15 on the tank wall is pumped out of the tap water pipe 9 and out of the tank. Continuously supplied sludge is sufficiently reduced, and the strength of the sludge is increased as a floc.
- the sludge is discharged from the sludge pipe 5 and goes to, for example, a dehydrator.
- the upper stirring blade 6a pivots horizontally near the inner periphery of the upper part of the tank wall of the cylindrical tank having the slit 15, and the flocs generated in the cylindrical tank are pushed by the stirring blade 6a to slide.
- Rolling along the inner wall of the tank wall along slot 15 does not cause clogging by being caught in the slit, and by rolling along the inner wall of the tank wall along the slit, it is more agile and strong. Become.
- the water that has flowed into the filtration tank 7 through the slit 15 is not drained from the drain pipe 9 by a pump or the like, but is drained by adjusting the flow rate using the J switch of a gutter attached outside the tank 7. You may do so.
- the level of the mud pipe 5 attached to the cylindrical tank 1 may be at the position where the slit 15 of the cylindrical tank is located, or may be below the swirling area of the upper stirring blade as shown in FIG.
- the sludge and the coagulant were separately supplied to the center of the bottom of the tank, but the coagulant was supplied to the sludge before being supplied to the tank.
- the sludge may be supplied to the center of the bottom of the tank with the coagulant added.
- the slits 8, 15 for entering water from the cylindrical tank into the control tank are directed to the direction of the water flow generated by the stirring blade in the cylindrical tank, and the floc is stirred by the stirring blade near the slit.
- the floc is stirred by the stirring blade near the slit.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Mechanical Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Filtration Of Liquid (AREA)
Description
明 細 書
凝 集 反 応 槽 技 術 分 野
この発明は凝集剤と共に槽内に供給される汚泥を、 攪 拌羽根を有する回転攪拌手段で攪拌し、 供給汚泥が低濃 度であっても充分な強度を有するフロ ッ クを生成するこ とが可能な凝集反応槽に関する。 北 景 技 黹
このよう な凝集反応槽と して実開昭 6 2一 4 8 4 0 5 号公報によ り 円筒槽と、 該円筒槽の中心部に縱設され、 槽内に供給される汚泥と凝集剤とを攪拌して、 フロ ッ ク 化する攪拌羽根を備えた回転攪拌手段と、 上記円筒槽内 の上部に同心状に設けられ、 該槽内の液を底から濾過し て受入れ、 これを前記円筒槽の外に排水する濾過槽とか ら なる もの (第 1 従来例) が公知である。 又、 実開昭 6 2 - 1 1 8 6 0 2号公報によ り 円筒槽内の上部に瀘遏 槽を同心状に設け、 該濾過槽の外周壁にある水平方向の 多段のスリ ッ トから円筒槽内の液を瀘過して受入れ、 こ れを円筒槽の外に排水する凝集反応槽 (第 2従来例) も 公知である。
更に、 円筒槽の槽壁の上部から槽内の液を外に遽過し
て取出す凝集反応槽 (第 3 従来例) も実開昭 6 1 - 8 1 0 同 8 1 1 号公報によ り公知である。
上記各従来例では、 瀘過槽内からフ ロ ッ クを殆ど舍ま ない濾液を槽外に铢水し; 円筒槽からは充分な強度を有 するフ ロ ッ クを铢出するこ とができるが、 第 1 従来钧の 瀘過槽の底はパンチングブレー トや網材で構成してある ため微細なフ ロ ッ クや、 汚泥中に含まれている微細な繊 維状物質がパンチングプレー トの孔ゃ、 網材の網目を閉 塞し、 目詰ま り を起す。
このため攪拌手段の回転軸に上記-接遒槽の底の上面と 下面に接して旋回するブラシやゴム板などのワイパを取 付け、 濾過槽の底を掃除するようにしているが、 繊維状 ¾ 物質がこれらのブラシやゴム坂などのワイパに絡み付 き、 充分な掃除効果をあげるこ とができない。
第 2従来例では瀘過槽の外周壁にある水平方向の多段 のスリ ッ トを微細なフロックや、 汚泥中に含まれている 微細な繊維状物質が閉塞し、 目詰ま り を生じさせる。 従って、 攪拌手段の回転轴に上記外周壁の内面を撫でる ブラシを放射状に取付け目詰まり を防止しているが、 こ のブラシに織維状物が絡み付き、 同様に充分な掃除効果 をあげるこ とができない。
又、 第 3従来例は槽壁に上下方向のスリ ッ トを開設し てある ため同様に汚泥中の繊維状物質がスリ ッ トに引
掛つて 目詰ま り を生じる。 このためスリ ッ トに槽外から 回転ブラシを接蝕させ、 掃除しているが、 同様に繊維状 物質がブラシに絡み付き、 充分な掃除効果をあげるこ と ができない。 発 明 の 開 示
そこで *発明の請求の範囲第 1 項では、 前記瀘過槽を 円筒槽内に設けてその底を攪拌羽根の旋回領域の上方に 位置させ、 該瀘過槽の底には円筒槽内の液を瀘通して入 れるためのスリ ッ トを該円筒槽と同心の円弧状に設け、 且つ、 前記攪拌羽根の上縁を瀘過槽の底の下面に近接さ せたこ とを特徴とする。
又、 請求の範囲第 2項では、 嫿過槽を円筒槽の槽壁の 上部外周の外に設け、 上記瀘過槽で囲まれた円筒槽の槽 壁の上部には該円筒槽内の液を濾過して瀘過槽に入れる ためのスリ ッ トを水平に設け、 且つ、 前記攪拌羽根の外 縁を円筒槽の槽壁の上部内周に近接させたこ とを特徴と する。 図面の簡単な説钥
第 1 図は本発明の請求の範囲第 1 項の凝集反応槽のー 実施例を示すもので、 円筒槽の一部を切除した斜視図、 第 2図は第 1 図の平面図、 第 3図は同じく 請求の範囲:第
2項の凝集反応槽のー実施例を示す円筒槽の一部を切除 した^視図、 第 4図は要部の拡大側面図である。 ' 発困を実施するための最良の形態 図面にもとずいて太発明を説明する。
図示の各実旌 において、 1 は円筒槽、 2は上記槽 1 の中心部に縱設され、 モータ、 変速機により 回転羼動さ れる回転攙拌手段、 3 と 4は汚泥と蔡集剤を槽内底部に 供給する紿泥管と薬注管、 5 は凝集したフロ ッ クを揉出 する铼泥管を示す。
回転攪拌手段の回転轴 2 'には上下二段に、 夫々 180。 の位相で放射状に攪拌羽根 6 a, 6 bが取付けてある。
第 1 , 2図は請求の範囲第 1項の一実 ¾倒であって、 円筒槽 1 の内周には同曲率の円 ¾部を沿わせて半円形よ り も少し小さい瀘過槽 7が設けてある。 遽遏槽 7の上端 と円筒槽 1 の上端は同レベルであり 、 瀘邊槽 7の底 7 'は 上段の攪拌羽根 6 aの上縁から上に 5〜2 0農通位しか離れて 居らず、 接近している。 そして、 上記底 7 'には円筒槽 1 と同心の円 ¾形のスリ ッ ト 8が多重に設けてある。 ス リ ッ ト 8の幅は 5 以下、 好ま しく は 1〜 2 a邐程度、 ス リ ッ トの半径方向に嗪接した間隔は 5 M程度である。 又、 スリ ッ トの円周方向に降接した間隔は 2 程度であ る。
そして、 この実施例では円筒槽 1 の.槽壁を貫いて瀘過 槽 7から槽外の遽遏水を铼水するための^水管 9が設け てある。
これによ り給泥管 3 と薬注管 4から円筒槽内底部の中 心部に供給された汚泥と凝集剤は、 槽内に滞留する間に 回転攪拌手段 2の攪拌羽根 6 a, 6 bの攪拌作用で均一に混 合して反応し、 その間、 嫿過槽 7の内部に底のスリ ッ ト 8を通じて入る水はポンプ等で抹水管 9から槽外に抹氷 するため、 連続して供給される汚泥は充分に濃縮され強 度の高いフロ ック となって锈泥管 5から铢出され、 例え ば脱水機に行く 。
そして、 瀘遏槽 7の底 7 'の直ぐ真下で上段の攪拌羽根 * 6 aが旋回して水平な旋回流を生じ、 氇遏槽の底に設けた ス リ ッ ト 8 はこ の旋回流に沿っ た同心の円 ¾形であ つ て、 液中の凝集フ ロ ッ クや繊維状物質は底 7 'の下をス リ ツ 卜 と同方向に流れるためスリ ツ トに引っ掛かるこ と がないと共に、 凝集フロックは底の下を転がってよ り ¾ 密で、 強固なものとなる。
攪拌羽根の上段のもの 6 aは図示の如く 回転軸 2 'に固定 された基部から先端までの全長にわたり上下方向の幅が 一定な平板と し、 下段の攪拌翼 6 bは全長の約半分程の回 転铀 2 'に取付け られた側の基部 1 0の上下方向の輻が狭 く 、 残り の自由端部 1 1の上下方向の輻が広い羽子板形と
するのが好ま しい。 それは、 こうする と上段の攪拌羽根 によって生じる水平旋回流 aの下で羽子板形攪拌羽根が 幅広い自由端部 11で外向きに水を押し、 その流れは旋回 しながら円筒槽の内周付近では上昇流 b と下降流 b 'に別 れ、 上昇淀 bは上の平板形攪拌羽根による水平旋回淀と 接触して中心部に向け下降し、 又、 下降淀 b 'は底面に 沿って中心部で上昇し、 かく して円筒槽内の中心部と底 部では旋回する上下の循環流が生じ、 槽内底部の中心部 に供給された汚泥と凝集剤はこの流れ b , b 'に乗って既 に生じた凝集フロック と菊率よく 混合接触して良好に凝 集するからである。 そして、 図示の如く 幅広い自由端部 1 1を羽根の旋回方向に対し後退する様に屈曲 (伢えば 45 ° ) させる と、 この自由端部が水を槽の内周に向かつ て押すこ とがよ り強まり 、 よ り強力な旋回循環流が得ら れるので混合、 接勉効率はよ り 向上する。 更に、 円筒槽 の内周の下端部及び、 上段の攪拌羽根 6 aと下段の攪拌羽 根 6 bの中問部に位置して攪拌羽根の接回方向に廷長し、 先端に向かって次第に内周から れる直線状又は図示の 如き彎曲した案内扳 12と 13を設ける と上の循環淀 bが水 平旋回淀の下に沿って淀れたのち中心部で下向し、 又、 下の循環淀 が槽底に沿ったのち中心部で上向するのを 夫々補助でき、 同様に混合、 接餞効率を向上する'こ とが できる。
第 1 , 2図に示した有効容量 ΙΟΟϋの円筒槽 (直径約 50cn、 高さ約 70ca) を用い、 PH5.1、TS( % ) 1.42、VTS ( ¾/TS )64.4, SS( % )1.21, VSS( %/ss) 65-4、繊維分 10.3、T-P( 通 g / 5. )228.0、上澄水中の P04— P( 重 g/ £ ) 44.2の汚泥を凝集剤と共に連続して供給し、 凝集、 瀵縮 させた結果、 敏密で強固な粒径 10〜20重■のフロックが抹 泥管 5から得られた。
尚、 回転軸の回転数は 40 RPM, 上段の平板攪拌羽根 6a の長さ 20ca、 上下方向の幅 8 cm、 下段の羽子板攪拌羽根 6bの基都 10の長さ 10c纖、 上下方向の幅 4 c纖、 自由端部 11 の長さ 10c駕、 上下方向の幅 12c纖、 両攪拌羽根の先端の周 速 50mノ分、 汚泥滞留時間 10分、 瀘 槽の水平断面積は 槽の水平断面積の 25.6%、 嫿過槽の底の円 ¾形スリ ッ ト の開口面積は爐過槽の水平断面積の 28.6%、 瀘遏槽の浸 漬深さ水面下 5 CB、 上段の平板攪拌羽根と瀘過槽の底の 間隔 1 cn、 円 ¾形スリ ッ トの幅 211«であった。 運転期間 中、 瀘遒槽の底の円¾形スリ ッ トに 目詰ま り は全く 生ぜ ず、 又、 維維物質等の付着も生じなかった。
嫿遏槽 7を円筒槽 1 内に固定設備と して設け、 底の円 ¾形スリ ッ ト 8を通じ筒内に入る瀘遏水は槽壁を貫通す る抹水管 9 を通じポンプで铼水してもよいが、 瀘遏槽 7 は円筒槽 1 とは別個にステンレス板で作り 、 その円 ¾部 には円筒槽の縁に上から引 っ掛けて吊下げる吊下げ金具
1 4を取付け、 この吊下げ金具 14で円筒槽内に吊下げても よ く 、 この場合は爐遏槽内に入った液はサイフォンで槽 外に铢水すればよい。
第 3, 4図は請求の範囲第 2項の蔡集反応槽の一実尨 例を示すもので、 上述した第 1 , 2図の実濾钧と相違す るのは 瀘遏槽 7を円筒槽 1 の槽壁の上部外周の外に設 け、 瀘遏槽 7で囲まれた円筒槽 1の槽壁の上部、 好まし く は上段の攪拌羽根 6 aの旋回領域に水平なスリ ッ ト 1 5を 上下方向に多段に設けた点である。 これにより上段の攪 拌羽根 S aの上縁は円筒槽 1 内の水面の直下に位置す る。
この実旄伢では嫿遏槽 7を円筒槽の槽壁の上部外周の 外に、 円筒槽のほ ^半周にわたって設けてあるが、 勿 論、 円筒槽の全周に設け、 諠邊槽により 円筒槽を囲んで よい。
そして、 攪拌羽根 6 aの外縁ないレ自由端はスリ ッ ト 1 5 を有する円筒槽の槽壁の内周に 5〜2 0通纖程度の問隔で近 接させ、 必要ならば外縁にコ'ム板を取付け、 回転中はこ のゴム板で円筒槽の槽壁の内周を撫でるよう にしてもよ レヽ。
ス リ 、j、 ト 1 5の上下方向の幅は 5 量纖以下、 好ま しく は 1〜 2 nil程度、 相互に上段のスリ ッ ト と下段のスリ ッ ト の間の上下方向の間隔は 5 程度である。
この実旄例の場合も、 紿泥管 3 と薬注管 4から円筒槽 内底部の中心部に供給された汚泥と凝集剤は、 槽内に滞 留する間に回転攪袢手段の攪拌羽根 6 a , 6 bの攪拌作用で 均一に混合して反応し、 その問、 槽壁のスリ ッ ト 1 5を通 じ嫿遏槽 7の内部に入る水はポンプ等で抹水管 9から槽 外に抹水するため、 連続して供給される汚泥は充分に整 縮され、 強度^)高いフロック となって抹泥管 5から铢出 され、 例えば脱水機に行く 。
そして、 上段の攪拌羽根 6 aはスリ ッ ト 1 5を有する円筒 槽の槽壁上部内周に近接して水平に旋回し、 円筒槽内に 生じたフロックは攪拌羽根 6 aに押されてスリ ッ ト 1 5沿い に槽壁内周を転がるのでスリ ッ トに引っ掛って詰まるこ とがないと共に、 スリ ッ ト沿いに槽壁内周を転がるこ と によってよ り敏密で、 強固ものとなる。
尚、 スリ ッ ト 1 5を通じ瀘過槽 7 に流入した水はポンプ 等で铢水管 9から铼水せず、 該槽 7の外に取付けた樋の J ツチで流量を調整して挵水するよう にしてもよい。 又、 円筒槽 1 に対する抹泥管 5の取付けレベルは円筒槽 のスリ ヅ ト 1 5がある位置でもよいし、 第 4図に示すよう に上段の攪拌羽根の旋回領域の下でもよい。
以上、 この発明による二つの実旌例を説明した。
この各実 ¾例では汚泥と凝集剤を槽内底部の中心部に 別々に供給したが、 槽に供給される前、 汚泥に凝集剤を
加え、 凝集剤を加えた状態で汚泥を槽内底部の中心部に 供給してもよい。 産業上の利用可能性
末発明によれば円筒槽から嫿遏槽に水が入るスリ ッ ト 8 , 15を攪拌羽根が円筒槽内に生じさせる水流の方向に 向け、 スリ ッ トの付近ではフロ ックを攪拌羽根で前方に 押レやるこ とにより攪拌羽根以外のブラシゃスク レーバ を使用する必要なく運転を行い、 目詰ま り を起こすこ と なく汚泥を凝集、 濃縮して敏密で強固なフロック とする こ とができる。 特に生物晩リ ン汚泥の場合、 リ ンの封鎖 が可能であって液側へリ ンを放出するこ となく 処理でき る。
Claims
( 1 )円筒槽と、 該円筒槽の中心都に設けられ、 槽内
に供給される汚泥と凝集剤とを攪拌して、 フ ロ ッ ク化す る攪拌羽根を備えた回転攪拌手段と、 上記円筒槽に付属 して設けられ、 該槽内の液を瀘通して受入れ、 これを前 記円筒槽の外に排水する濾過槽とからなる凝集反応槽に おいて、
前記瀘過槽を円筒槽内に設けてその底を攪拌羽根の旋 回領域の上方に位置させ、 該濾遏槽の底には円筒槽内の 液を瀘過して入れるためのスリ ッ トを該円筒檣と同心の 円弧状に設け、 且つ、 前記攪拌羽根の上縁を瀘過槽の底 の下面に近接させたこ とを特徴とする凝集反応槽。
( 2 )円筒槽と、 該円筒槽の中心部に設けられ、 槽内
に供給される汚泥と凝集剤とを攪拌して、 フ ロ ッ ク化す る攪拌羽根を備えた回転攪拌手段と、 上記円筒槽に付属 して設けられ、 該槽内の液を瀘過して受入れ、 これを前 記円筒槽の外に拂水する瀘過槽とからなる凝集反応槽に おいて、
前記瀘過槽を円筒槽の槽壁の上部外周の外に設け、 上 記瀘過槽で囲まれた円筒槽の槽壁の上部に該円筒槽内め 液を瀘過して瀘過槽に入れるためのスリ ッ トを氷平に設 け、 且つ、 前記攪拌羽根の外縁を円筒槽の槽壁の上部内 周に近接させたこ とを特徴とする凝集反応槽。
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JPS5277461A (en) * | 1975-12-18 | 1977-06-29 | Rittershaus & Blecher Gmbh | Mixing chamber for coagulating turbid liquid |
JPS61810U (ja) * | 1984-06-08 | 1986-01-07 | 栗田工業株式会社 | 凝集反応槽 |
JPS61118602U (ja) * | 1985-01-10 | 1986-07-26 | ||
JPS6248405U (ja) * | 1985-09-14 | 1987-03-25 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1639590A (en) * | 1926-12-06 | 1927-08-16 | Levin O Corkran | Screen cleaner |
US1687428A (en) * | 1927-01-12 | 1928-10-09 | Corkran Levin Otis | Screen cleaner |
US2181404A (en) * | 1938-02-07 | 1939-11-28 | Benjamin A Koppitz | Strainer |
US2404215A (en) * | 1943-10-02 | 1946-07-16 | Du Pont | Slurry filtration |
US2594785A (en) * | 1947-02-21 | 1952-04-29 | Worthington Pump & Mach Corp | Comminutor |
IT1074908B (it) * | 1975-06-12 | 1985-04-22 | Mead Corp | Dispositivo porta bottiglie |
US4155841A (en) * | 1977-03-22 | 1979-05-22 | The Black Clawson Company | High turbulence screen |
JPS6118602U (ja) * | 1984-07-07 | 1986-02-03 | ティーディーケイ株式会社 | フイルタ装置 |
JPH0514321Y2 (ja) * | 1985-01-08 | 1993-04-16 | ||
FR2623419B1 (fr) * | 1987-11-25 | 1990-03-23 | Combustion Eng Europ | Appareil de filtrage autonettoyant |
-
1988
- 1988-12-23 KR KR1019890701264A patent/KR960010367B1/ko not_active IP Right Cessation
- 1988-12-23 WO PCT/JP1988/001321 patent/WO1989006154A1/ja active IP Right Grant
- 1988-12-23 US US07/499,345 patent/US5069784A/en not_active Expired - Lifetime
- 1988-12-23 EP EP89900904A patent/EP0397864B1/en not_active Expired - Lifetime
- 1988-12-23 DE DE3886420T patent/DE3886420T2/de not_active Expired - Fee Related
- 1988-12-23 JP JP1500806A patent/JP2554545B2/ja not_active Expired - Lifetime
-
1992
- 1992-03-24 US US07/858,438 patent/US5160041A/en not_active Expired - Lifetime
-
1995
- 1995-12-15 JP JP7347176A patent/JP2691526B2/ja not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5277461A (en) * | 1975-12-18 | 1977-06-29 | Rittershaus & Blecher Gmbh | Mixing chamber for coagulating turbid liquid |
JPS61810U (ja) * | 1984-06-08 | 1986-01-07 | 栗田工業株式会社 | 凝集反応槽 |
JPS61118602U (ja) * | 1985-01-10 | 1986-07-26 | ||
JPS6248405U (ja) * | 1985-09-14 | 1987-03-25 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5399014A (en) * | 1990-08-07 | 1995-03-21 | Shinko Pantec Company Ltd. | Mixing apparatus |
CN109364546A (zh) * | 2018-10-09 | 2019-02-22 | 苏州市银猴淀粉有限公司 | 一种淀粉的加工设备及加工方法 |
Also Published As
Publication number | Publication date |
---|---|
JPH08224407A (ja) | 1996-09-03 |
EP0397864B1 (en) | 1993-12-15 |
JP2691526B2 (ja) | 1997-12-17 |
EP0397864A1 (en) | 1990-11-22 |
KR900700173A (ko) | 1990-08-11 |
DE3886420D1 (de) | 1994-01-27 |
DE3886420T2 (de) | 1994-05-19 |
US5160041A (en) | 1992-11-03 |
EP0397864A4 (en) | 1991-01-23 |
JP2554545B2 (ja) | 1996-11-13 |
KR960010367B1 (ko) | 1996-07-31 |
US5069784A (en) | 1991-12-03 |
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