JPS60890A - Rotary disk type water treating apparatus - Google Patents

Abstract

PURPOSE:To obtain a water treating apparatus consuming little energy and having high purification efficiency by combining a centrifugal disk of ca. 40% degree of immersion and a centrifugal disk of ca. 75% degree of immersion in two stages against a flow vertical to a shaft interposing a partition plate. CONSTITUTION:Many thin disks 8 serving as rotary disk body 5a, 5b are fitted to a main shaft 7 with ca. 20mm. distance and being parallel to each other, and plural numbers of radial blades 9 are provided to between the parallel blades to keep the distance between disks, and plural numbers of communicating holes 10 are formed in a section at a center of the disk 8 sandwiched by the radial blades 9. Centrifugal rotary disks 5a, 5b are constituted in this manner. When the centrifugal rotary disks 5a, 5b having above described structure are driven under conditions of ca. 40% or ca. 75% degree of immersion, a radial flow introduced from the communicating hole 10 and discharged from the external periphery of the disks are induced in the disks by the effect of centrifugal force of radial blades of the centrifugal disks.

Description

【発明の詳細な説明】 本発明は、既設水槽を改造して低濃度基質の河川水を処
理する生物接触酸化装置である回転円板水処理装置に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotating disk water treatment device which is a biological catalytic oxidation device for treating river water with low substrate concentration by modifying an existing water tank.

回転円板水処理装置は、最近河川水のような低濃度基質
の処理にも極めて有効であることが認められて、農業用
水の浄化や上水道の前処理に採用されるようになりつつ
ある。Rotating disk water treatment devices have recently been recognized to be extremely effective in treating low-concentration substrates such as river water, and are increasingly being adopted for purification of agricultural water and pretreatment of water supplies.

さきに大阪府神安土地改良区で行なわれた回転円板法に
よる農業用水の浄化実験の結果によれば、回転円板の形
状としては遠心形の平板形円板が波形円板よりも硝化効
率が良く、円板の周速度も普通の回転円板に使われてい
る１　８　ｍ　／ｍａｉｎよりも周’　Ｍ　度（Ｄ　Ｍ
　イ２７　ｍ’／ｍｉｎ程度の方がアンモニア態窒素に
対する硝化効率が向上することが確認されている。According to the results of an agricultural water purification experiment using the rotating disk method conducted in the Shin'an Land Improvement District in Osaka Prefecture, a centrifugal flat disk was more effective in nitrification than a corrugated disk. Efficiency is high, and the circumferential speed of the disc is 18 m/main, which is used for ordinary rotating discs.
It has been confirmed that the nitrification efficiency for ammonia nitrogen is improved at a speed of about 27 m'/min.

また上水道においても、この回転円板法がアンモニア態
窒素の硝化ならびに臭気等の除失を主目的とした前処理
装置として採用され始めようとしているが、この場合既
設浄水場を改造する場合が多くなることが予想される。In addition, this rotating disk method is beginning to be adopted in water supply systems as a pre-treatment device with the main purpose of nitrifying ammonia nitrogen and eliminating odors, etc., but in many cases, existing water treatment plants must be remodeled. It is expected that

本発明はこの点を考慮して、比較的簡単な改造で一般の
回転円板槽よりも深く、がっ面積も広い既設水槽を有効
に活用でき、しがも他の処理方法よりも省エネルギーで
浄化効率の高い水処理装置を提供することを目的とする
ものである。以下図面について本発明の詳細な説明する
。Taking this point into consideration, the present invention makes it possible to effectively utilize an existing water tank, which is deeper than a general rotating disk tank and has a wider area, with a relatively simple modification, while being more energy-saving than other treatment methods. The purpose is to provide a water treatment device with high purification efficiency. The present invention will be described in detail below with reference to the drawings.

第１図は本発明の一実施例を示す縦断正面図であり、第
２図はその縦断側面図であって、図中１は既設で、１５
ｆｎｌＡ度の深さと数十ｍの長さのある長方形水槽であ
る。この水槽の長手方向の両側壁の内側の上面近くに、
側壁と平行して流入水路２と流出水路３を設け、流入、
流出水路と円板水［Ｉ４とを形成する。FIG. 1 is a longitudinal sectional front view showing one embodiment of the present invention, and FIG. 2 is a longitudinal sectional side view thereof, in which 1 is an existing installation,
It is a rectangular aquarium with a depth of fnlA degrees and a length of several tens of meters. Near the top of the inside of both longitudinal walls of this aquarium,
An inflow channel 2 and an outflow channel 3 are provided parallel to the side wall, and the inflow,
Forms an outflow channel and a water disc [I4].

この円板水槽４内には、水槽の長手方向と直角の方向に
浸漬率４０％程度の標準浸漬率の回転円板体５ａを一段
目に配置すると共に、円板外周と水槽底面との１ｍ隔を
円板径の約１０％とした浸漬率７５％程度の回転円板体
５ｂを２段目になるように、主軸を水槽の長手方向と平
行に配置し、かつこれら２台の円板体５ａと５ｂの間に
、下部に開口を有する仕切板６を設けて、軸直角流２段
形の回転円板装置を構成すると共に、それらを既設水槽
１の長手方向に複数列並置することによって、大水量を
処理できる水処理装置を構成する。In this disk water tank 4, a rotating disk body 5a with a standard immersion rate of about 40% is arranged in the first stage in a direction perpendicular to the longitudinal direction of the tank, and a distance of 1 m between the outer periphery of the disk and the bottom surface of the tank is A rotary disk body 5b with an immersion rate of about 75% with a spacing of about 10% of the disk diameter is arranged as the second stage, with its main axis parallel to the longitudinal direction of the water tank, and these two disks A partition plate 6 having an opening at the bottom is provided between the bodies 5a and 5b to configure a two-stage rotating disk device for flow perpendicular to the axis, and a plurality of rows of them are arranged in parallel in the longitudinal direction of the existing water tank 1. This constitutes a water treatment device that can treat a large amount of water.

次に、本発明の回転円板体５ａ及び５ｂとしては、第３
図に示すように主軸７に直角に２Ｑｍｔｎ程度の間隔で
平行する多数の薄い円板８を嵌め込み、それらの平行す
る円板８の間に複数枚の放射状羽根９を設けて円板間隔
な保つとともに、円板８の中心部で放射状羽根９に挟ま
れた個所に、複数個の流通孔１０をあけて遠心形量転円
板体を構成す仝０ このような構造にした遠心形量転円板体５ａ。Next, as the rotating disk bodies 5a and 5b of the present invention, the third
As shown in the figure, a large number of parallel thin disks 8 are fitted perpendicularly to the main axis 7 at intervals of about 2Qmtn, and a plurality of radial blades 9 are provided between the parallel disks 8 to maintain the disk spacing. At the same time, a plurality of flow holes 10 are formed in the central part of the disk 8 between the radial blades 9 to form a centrifugal transfer disk body. Disc body 5a.

５ｂを４０％程度あるいは７５％程度の浸漬率の状態で
運転すると、遠心形円板の放射状羽根の遠心力作用によ
って、円板体内には流通孔１ｏがら入って円板外周から
外側に出て行く放射状の流れが誘起されるようになる。When 5b is operated at an immersion rate of about 40% or 75%, the centrifugal force of the radial blades of the centrifugal disc causes water to enter the disc body through the circulation holes 1o and exit from the outer periphery of the disc. A radial flow will be induced.

ことにこの遠心形円板体の周速度を、普通の回転円板に
使われている１　８　ｍ　／ｍｌｎよりも周速度を速く
して約１．５倍の２７　ｍ　／ｍｉ咽度にあげてやると
、約４０％の標準浸漬率の遠心形回転円板の実験結果で
は、１段の円板体にょる溶存酸素量Ｄｏの増加率は平均
１２０％から１６０％と８０％以上も向上することが確
かめられている。In particular, the circumferential speed of this centrifugal disk was increased to 27 m/ml, about 1.5 times faster than the 18 m/mln used for ordinary rotating disks. According to the experimental results of a centrifugal rotating disk with a standard immersion rate of about 40%, the rate of increase in the amount of dissolved oxygen Do in the first-stage disk body increased by more than 80%, from an average of 120% to 160%. It has been confirmed that it does.

一方浸漬率７５％程度の回転円板でも、溶存酸素量Ｄｏ
が５ｍｇ／）以上確保できれば、７０％程度の硝化効率
が得られることが実験的にも確められているので、浸漬
率約４０％の遠心形円板体５ａと浸漬率約７５％の遠心
形円板体５ｂを仕切板６を間に挟んで軸直角流２段形に
組み合わせ、しがも１段目の円板周速度を２　ｑ　ｍ　
／ｍｉ鳴度に速くすることによ−って、１段目円板水槽
内の攪拌を良くして、う槽内の汚水の停滞を防ぐと同時
に溶存酸素量を増加させ、２段目水槽における溶存酸素
＠Ｄ。On the other hand, even with a rotating disk with an immersion rate of about 75%, the amount of dissolved oxygen Do
It has been experimentally confirmed that if 5 mg/) or more can be secured, a nitrification efficiency of about 70% can be obtained. The disk bodies 5b are combined into a two-stage flow perpendicular to the axis with a partition plate 6 in between, and the circumferential speed of the disk in the first stage is set to 2 q m.
By increasing the noise level to /mi, the agitation in the first stage disk tank is improved, preventing sewage from stagnation in the tank, and at the same time increasing the amount of dissolved oxygen. Dissolved oxygen in @D.

が５　ｍｇ　／　１以上を確保することが可能になる。It becomes possible to secure 5 mg/1 or more.

このような円板配置にすることによって、２段目円板体
５ｂの硝化作用は十分な効果を上げることができる。な
お２段目円板の周速度は処理条件に最適な速度に調整す
る。By arranging the disks in this manner, the nitrification effect of the second-stage disk body 5b can be sufficiently effective. Note that the circumferential speed of the second-stage disk is adjusted to the optimum speed for the processing conditions.

本発明は、上記のように回転を上げた浸漬率約４０％の
遠心形円板体と、浸漬率約７５％の遠心形円板体とを仕
切板を挟んで軸直角流に対して２段に組み合わせること
によって、単独の円板槽では得られない特徴を発揮でき
るようになり、総合で８０％以上の硝化効率を確保でき
るので、省エネルギーで大水量を処理でき、しかも浄化
効率の高い上水道前処理装置が可能となる。In the present invention, the centrifugal disk body with an immersion rate of about 40% and the centrifugal disk body with an immersion rate of about 75%, which are spun up as described above, and a centrifugal disk body with an immersion rate of about 75% are placed in parallel to the axis-perpendicular flow with a partition plate in between. By combining in stages, it is possible to exhibit features that cannot be obtained with a single disc tank, and it is possible to ensure a total nitrification efficiency of over 80%, making it possible to process large amounts of water with energy savings and water supply with high purification efficiency. Pretreatment equipment becomes possible.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明に係る回転円板装置の一実施例を示す縦
断正面図、 第２図はそのＡ−Ａ矢視による縦断側面図、第３図はそ
れに使用する回転円板体の斜視図である。 １・・・既設長方形水槽、　２・・・流入水路、３・・
・流出水路、　４・・・円板水槽、５ａ・・・標準浸漬
率回転円板体、 ５ｂ・・・約７５％浸漬率の回転円板体、６・・・仕切
板、　７・・・主軸、 ８・・・円板、　９・・・放射状羽根、１０・・・流通
孔。 特許出願人　大　阪　府FIG. 1 is a longitudinal sectional front view showing one embodiment of a rotating disk device according to the present invention, FIG. 2 is a longitudinal sectional side view taken along the line A-A, and FIG. 3 is a perspective view of a rotating disk body used therein. It is a diagram. 1... Existing rectangular water tank, 2... Inflow channel, 3...
- Outflow channel, 4... Disc water tank, 5a... Standard immersion rate rotating disk body, 5b... Rotating disk body with approximately 75% immersion rate, 6... Partition plate, 7... Main shaft, 8... Disk, 9... Radial blade, 10... Distribution hole. Patent applicant Osaka Prefecture

Claims (1)

【特許請求の範囲】[Claims] １　既設水槽を改造して低濃度基質の河川水を処理する
生物接触酸化装置において、水槽の長手方向の両側壁内
側に流入水路及び流出水路を設けて回転円板水槽を形成
し、主軸に直角に多数の薄い円板を２０隨程度の間隔で
嵌め込み、平行する円板の間に複数枚の放射状羽根を設
けると共に、円板中心部の放射状羽根に挟まれたそれぞ
れの個所に複数個の流通孔を設けた遠心形回転円板体を
、水槽の長手方向と直角の方向に約４０％の標準浸漬率
の円板体として一段目に配置すると共に、水槽底面との
間隔を円板径の約１０％とした浸漬率約７５％の円板体
を２段目に配置し、これら２台の円板体の間に下部に開
口を有する仕切板を設けて軸直角流２段形の回転円板装
置を構成し、１段目の円板体の周速度を普通の円板体の
約１．５倍の２７　ｍ　Ｊｉｎ程度に速くすることによ
って水槽の攪拌を良くして溶存酸素量の増加率を向上さ
せ、２段目円板体の周速度は処理に最適な速度に調節す
ることによって処却効率を上げるようにし、それらを既
設水槽の長手方向に複数列並置して、省エネルギーの設
備で大水量を硝化できるようにしたことを特徴とする回
転円板水処理装置。1. In a biological catalytic oxidation device that processes river water with low substrate concentration by modifying an existing water tank, an inflow waterway and an outflow waterway are provided inside both longitudinal walls of the water tank to form a rotating disk water tank, and the water tank is perpendicular to the main axis. A large number of thin disks are fitted at intervals of about 20, and a plurality of radial blades are provided between the parallel disks, and a plurality of communication holes are formed at each location between the radial blades in the center of the disk. The centrifugal rotating disc body provided is placed in the first stage as a disc body with a standard immersion rate of about 40% in the direction perpendicular to the longitudinal direction of the water tank, and the distance from the bottom of the tank is approximately 10 of the disc diameter. A disk body with an immersion rate of about 75% is placed in the second stage, and a partition plate with an opening at the bottom is provided between these two disk bodies to create a two-stage rotating disk for axis-perpendicular flow. By configuring the device, the circumferential speed of the first stage disk is increased to about 27 m Jin, which is about 1.5 times that of a normal disk, thereby improving the agitation of the water tank and increasing the rate of increase in the amount of dissolved oxygen. The circumferential speed of the second-stage disc body is adjusted to the optimum speed for treatment to increase treatment efficiency, and multiple rows of them are arranged in parallel in the longitudinal direction of the existing water tank to create energy-saving equipment. A rotating disk water treatment device characterized by being able to nitrify a large amount of water.