JPH03288589A - Method for controlling operation of washing sewage treatment apparatus of electric precipitator - Google Patents
Method for controlling operation of washing sewage treatment apparatus of electric precipitatorInfo
- Publication number
- JPH03288589A JPH03288589A JP2090581A JP9058190A JPH03288589A JP H03288589 A JPH03288589 A JP H03288589A JP 2090581 A JP2090581 A JP 2090581A JP 9058190 A JP9058190 A JP 9058190A JP H03288589 A JPH03288589 A JP H03288589A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- sewage
- flocculant
- water
- level
- 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.)
- Pending
Links
- 239000010865 sewage Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims description 8
- 238000005406 washing Methods 0.000 title abstract description 14
- 239000012716 precipitator Substances 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- 239000004071 soot Substances 0.000 claims abstract description 20
- 238000004140 cleaning Methods 0.000 claims description 29
- 239000000428 dust Substances 0.000 claims description 21
- 239000012717 electrostatic precipitator Substances 0.000 claims description 20
- 239000000243 solution Substances 0.000 description 10
- 239000002351 wastewater Substances 0.000 description 10
- 239000011550 stock solution Substances 0.000 description 8
- 239000010802 sludge Substances 0.000 description 7
- 238000005188 flotation Methods 0.000 description 6
- 238000000926 separation method Methods 0.000 description 5
- 239000000701 coagulant Substances 0.000 description 4
- 239000008394 flocculating agent Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Physical Water Treatments (AREA)
- Electrostatic Separation (AREA)
Abstract
Description
この発明は、電気集じん機、特に自動車道トンネル内の
空気を清浄化するために設置した電気集じん機を水洗浄
したときに生じる洗浄汚水の処理装置を運転するための
制御方法に関する。The present invention relates to a control method for operating an electrostatic precipitator, particularly a device for treating washed sewage generated when an electrostatic precipitator installed to purify the air in a highway tunnel is washed with water.
電気集じん機の集じん通路には捕集した煤じんが堆積す
るので、集じん通路はしばしば洗浄する必要があるが、
その手段として堆積した煤じんに圧さく空気を吹付ける
空気洗浄と、加圧した水を吹付ける水洗浄とが知られて
いる。空気洗浄は操作が簡便であるため、一般にはこの
空気洗浄が用いられている。しかし、煤じんに粘着性が
ある場合には空気吹付では十分に煤じんを洗い落とすこ
とができず、水洗浄が必要となってくる。
一方、自動車道トンネル内の空気浄化設備としてトンネ
ル用電気集じん機が設置され、車道内から抽気した汚染
空気を電気集じん機で清浄化した後、再び車道内に送気
することが行われている。
ところが、近年、このトンネル用電気集じん機で捕集さ
れる煤じんに粘着成分が多くなり、上記空気洗浄による
対応が困難になってきている。この粘着性の煤じんば、
冬−期に自動車に対するスパイクタイヤの装着が増え、
路面が削られて発生するコンクリートダストと塩化カル
シウムなどの融雪剤とが結合して生じるものと考えられ
ている。
このため、トンネル用電気集じん機には水洗浄を適用す
る必要が住じてきているが、水洗浄は洗浄力が大きいも
のの洗浄後の電極の乾燥や、洗浄により生じた汚水の処
理など、空気洗浄にはない厄介な事項を多く含んでいる
。
ところで、上記トンネル用電気集じん機を洗浄して生じ
た汚水には、凝集性が悪いという問題がある。そこで、
この発明の発明者等はこの点について実験を重ね、凝集
剤として無機凝集剤と有機凝集剤とを組み合わせて用い
ると凝集速度が速く、また形成される煤じんフロックの
粒径も大きくなること、及び固液分離には凝集後の汚水
に空気溶解水を導入し、煤じんフロックを浮上させて分
離することが最も有効であることを見出し、先にこの発
明の出願人により出願した（特願昭６２−１７０５７７
号）。
また、その後の研究により上記汚水処理には管状の凝集
剤混合器及び凝集器が適していることを見出し同様に出
願した（特願平１−３３２１２０号）。Collected soot and dust accumulates in the dust collection passage of an electrostatic precipitator, so the dust collection passage must be cleaned frequently.
As means for this purpose, air cleaning, in which compressed air is sprayed onto the accumulated soot and dust, and water cleaning, in which pressurized water is sprayed, are known. Air cleaning is generally used because it is easy to operate. However, if the soot and dust is sticky, the soot and dust cannot be washed away sufficiently by air blowing, and water washing becomes necessary. On the other hand, tunnel electrostatic precipitators are installed as air purification equipment in expressway tunnels, and after the contaminated air extracted from the roadway is purified by the electrostatic precipitator, the air is sent back into the roadway. ing. However, in recent years, the soot and dust collected by electrostatic precipitators for tunnels has increased in adhesive components, making it difficult to deal with the problem through air cleaning. This sticky soot,
The number of spiked tires on cars increases during the winter season.
It is thought to be caused by the combination of concrete dust generated when road surfaces are scraped and snow-melting agents such as calcium chloride. For this reason, it has become necessary to apply water cleaning to electrostatic precipitators for tunnels, but although water cleaning has a large cleaning power, it is difficult to dry the electrodes after cleaning and treat wastewater generated by cleaning. It includes many troublesome matters not found in air cleaning. By the way, there is a problem in that the wastewater generated by washing the tunnel electrostatic precipitator has poor coagulation properties. Therefore,
The inventors of this invention conducted repeated experiments on this point, and found that using a combination of an inorganic flocculant and an organic flocculant as flocculants increases the flocculation speed and increases the particle size of the soot and dust flocs formed. It was discovered that the most effective method for solid-liquid separation is to introduce air-dissolved water into the sewage after coagulation, float the soot and dust flocs, and separate the soot and dust flocs. Showa 62-170577
issue). Further, through subsequent research, it was discovered that tubular flocculant mixers and flocculators were suitable for the above-mentioned sewage treatment, and a similar application was filed (Japanese Patent Application No. 1-332120).
すでに述べたように、電気集じん機の洗浄には主として
空気が用いられてきたことがら、トンネル用電気集じん
機におけるような水洗浄の歴史は新しく、その洗浄汚水
の処理装置を全体的に制御する技術も知られていない。
この発明は、特に上記出願にかかる電気集じん機の洗浄
汚水の処理装置において、処理の開始から終了までを無
人で自動運転するための運転制御方法を提供することを
目的とするものである。As mentioned above, since air has been mainly used for cleaning electrostatic precipitators, the history of water cleaning, such as in tunnel electrostatic precipitators, is new, and the overall treatment equipment for cleaned sewage is The technology to control it is also unknown. The object of this invention is to provide an operation control method for automatically operating the electrostatic precipitator washing sewage treatment apparatus according to the above-mentioned application from the start to the end of the treatment in an unmanned manner.
電気集じん機の洗浄汚水の処理装置を長期間、連続的に
無人運転するために、発明者らは各タンクの水位を検知
し、それらの信号を用いて運転制御を行う方式のシステ
ムフローを開発した。すなわち、この発明は、電気集じ
ん機を洗浄して生じた汚水に無機凝集剤及び有機凝集剤
を加えて煤じんフロックを形成させ、次いでこの汚水に
空気熔解水を導入して前記煤じんフロックを浮上させて
分離する電気集じん機の洗浄汚水処理装置において、汚
水タンクの水位があるレベル以上になると無機凝集剤タ
ンク、有機凝集剤タンク及び洗浄用水タンクの残量水位
を検知し、有機凝集剤溶液があるレベル以上ある場合は
直ちに、またあるレベル以下の場合はあるレベルまで有
機凝集剤溶液を作成して汚水処理を開始し、前記汚水タ
ンク、前記無機凝集剤タンク、あるいは前記有機凝集剤
タンクの水位があるレベルまで低下すると管内洗浄を行
って処理を停止するものである。In order to continuously operate unmanned electrostatic precipitator cleaning wastewater treatment equipment for long periods of time, the inventors developed a system flow that detects the water level in each tank and uses these signals to control operation. developed. That is, the present invention adds an inorganic flocculant and an organic flocculant to the waste water generated by washing an electrostatic precipitator to form a soot and dust floc, and then introduces air-dissolved water into the waste water to form the soot and dust floc. In cleaning sewage treatment equipment using an electrostatic precipitator that floats and separates waste water, when the water level in the sewage tank exceeds a certain level, the remaining water levels in the inorganic flocculant tank, organic flocculant tank, and cleaning water tank are detected, and the organic flocculant is removed. If the agent solution is above a certain level, an organic flocculant solution is immediately prepared, and if it is below a certain level, an organic flocculant solution is prepared to a certain level and sewage treatment is started. When the water level in the tank drops to a certain level, the pipes are cleaned and processing is stopped.
この発明にかかる汚水処理に用いる有機凝集剤は原液を
希釈した溶解液を作成した後、−週間程度以内に使用し
ないと加水分解などにより性能が低下するので、有機凝
集剤の貯溜量には限界がある。一方、無機凝集剤は長期
保存が可能で、その貯溜量により相当長期間の汚水処理
装置の稼働が可能である。そこで、この発明は、有機凝
集剤タンクの水位をチエツクし、残量が不足している場
合には自動的に有機凝集剤溶液を作成する機能を取り入
れた。これにより、装置の長期間の連続運転が可能とな
る。The performance of the organic flocculant used in sewage treatment according to this invention deteriorates due to hydrolysis if it is not used within about a week after diluting the original solution to create a solution, so there is a limit to the amount of organic flocculant that can be stored. There is. On the other hand, inorganic flocculants can be stored for a long period of time, and depending on the amount of inorganic flocculants stored, it is possible to operate the sewage treatment equipment for a considerable period of time. Therefore, this invention incorporates a function that checks the water level of the organic flocculant tank and automatically creates an organic flocculant solution if the remaining amount is insufficient. This allows continuous operation of the device for a long period of time.
第１図は汚水処理装置のシステム構成図、第２図はその
運転制御のフローチャートである。
第１図において、１は図示しない電気集じん機を洗浄し
て発生した汚水を受は入れる汚水タンク、２はその撹拌
機、３は洗浄用の清水を貯溜した洗浄用水タンク、４は
汚水タンク１から汚水を導く汚水供給弁、５は洗浄用水
タンク１０から洗浄用水を導く洗浄用水供給弁、６は汚
水及び洗浄用水を汲み出す汚水ポンプ、７は無機凝集剤
溶液を貯溜した無機凝集剤タンク、８は無機凝集剤を供
給する無機凝集剤ポンプ、９は有機凝集剤を溶解してそ
の溶液を貯溜した有機凝集剤タンク、１０はその撹拌機
、１１は有機凝集剤を供給する有機凝集剤ポンプ、１２
は有機凝集剤の原液を貯溜した有機凝集剤原液タンク、
１３はその撹拌機、１４は有機凝集剤原液タンク１２の
原液を有機凝集剤タンク９に注入する原液注入ポンプ、
１５は洗浄用水タンク３から有機凝集剤原液を溶解する
溶解水を供給する溶解水供給弁、１６は汚水に無機凝集
剤を混合させる管状の混合器、１７は混合器１６を出た
汚水に有機凝集剤を混合させる同じ（管状の混合器、１
８は無機凝集剤及び有機凝集剤を混合させた汚水中の煤
じんを凝集させて煤じんフロックを形成させる管状の凝
集器、１９は空気溶解水を作成する加圧水発生装置、２
０は加圧水発生装置に後述する浮上分離槽からの処理水
を再利用して圧入する加圧水ポンプ、２１は加圧水を供
給する加圧水弁、２２は凝集器１８からの汚水に加圧水
発生装置１９からの空気溶解水を導入し、汚水中の煤じ
んフロックを浮上させる浮上分離槽、２３は浮上分離槽
２２の水面に浮上した煤じんフロックを掻き寄せる汚泥
掻寄機、２４は掻き寄せられた汚泥を貯溜する汚泥タン
クである。
上記構成中、汚水タンク１は毎日数回洗浄を行う電気集
じん機の１日分の汚水を受は入れる容量を持っている。
また、無機凝集剤タンク７は３ケ月分程度の汚水を処理
する容量を持ち、有機凝集剤タンク９は同じく３日分程
度の容量を持っている。
それでは、このような汚水処理装置の運転制御のフロー
について、第２図のフローチャートを参照しながら説明
する。なお、第２図のＯ中にＴを表示した記号はタイマ
による所定時間の経過を示している。また、連動は各機
器を連動させて自動運転を行う連動モードを、単独は主
としてテストのために各機器を単独で運転する単独モー
ドを表している。
まず、汚水タンク１の水位を図示しないレベル計で検知
し、撹拌機２の羽根が隠れる程度の水位（Ｍレベル）以
上であるかどうかをチエツクして（ステップＳｔ）、Ｍ
レベル以上であれば撹拌機２を運転しくステップＳ２）
、Ｍレベル以下になれば撹拌機２を停止する（ステップ
Ｓ３→Ｓ４）。
そして、水位が更にそれより上位の水位（Ｈレベル）以
上であれば処理を開始する（ステップＳ５）。
次いで、有機凝集剤タンク９の水位があるレベル（Ｌレ
ベル）以上であるかをチエツクしくステップＳ６）、そ
れ以下であれば次に述べる有機凝集剤溶液作成フローに
入る。
すなわち、まず有機凝集剤原液タンク１２の撹°拌機１
３をタイマにより一定時間運転しくステップＳ７→ステ
ツプＳ８）、同時に溶解水供給弁１５を開いて図示しな
いレベル計により有機凝集剤タンク９が満水（Ｈレベル
）になるまで水を注入する（ステップ３９〜５１１）。
そこで、有機凝集剤タンク９の撹拌機１０を一定時間運
転しくステップＳ１２→５１３）、その間に有機凝集剤
原液ポンプ１４を一定時間運転して、有機凝集剤原液を
有機凝集剤タンク９に一定量注入する（ステップ５１４
→５１５）。
このようにして、有機凝集剤タンク９の水位が満たされ
ると、その他の起動条件として、無機凝集剤タンク７及
び洗浄用水タンク３の水位があるレベル以上であること
、故障表示がないことなどを確認し、実質的な運転に入
る。
そこで、加圧水弁２１を開いて加圧水ポンプ２０を運転
しくステップ３１６〜３１Ｂ）、同時に、汚泥掻寄機２
３を運転する（ステップ５１９）。
一定時間後、加圧水圧力が正常であるかどうかをチエツ
クしくステップ５２０）、正常なら洗浄用水供給弁５を
開き（ステップ５２１）、更に汚水ポンプ６、無機凝集
剤ポンプ８、有機凝集剤ポンプ１１を運転する（ステッ
プ５２２）。そして、一定時間経過したら、洗浄用水供
給弁１５を閉じ、汚水供給弁４を開く（ステップ５２３
）。この時点で、汚水処理運転が開始される。汚水供給
弁４を開ける前に洗浄用水供給弁を開けるのは、混合機
１６及び１７内を水で満たした上で無機凝集剤及び有機
凝集剤を注入し、流量の小さいこれら凝集剤が汚水の取
り出し前に配管内に行き渡るようにするためである。
以降は汚水処理を実行し、汚水タンク１の水位があるレ
ベル（Ｌレベル）以下、又は無機凝集剤タンク７あるい
は有機凝集剤タンク９の水位があるレベル（Ｌレベル）
以下になったら終了指令を出して処理を終了する。そこ
で、汚水供給弁４を閉じ、同時に洗浄用水供給弁５を開
く（ステ・ンプ５２４）、これは凝集器１８内に付着し
た煤じんフロックを除去するためで、その間、凝集剤の
供給を続けて配管内に残留する汚水の処理に供し、一定
時間経過したら無機凝集剤ポンプ８及び有機凝集剤ポン
プ１１を停止する（ステップ３２５）。
そして、更に一定時間経過したら洗浄用水供給弁５を閉
じ、汚水ポンプ６を停止する（ステ・ノブ５２６）。
一方、加圧水ポンプ２０は終了指令後一定時間の経過を
待って、残留する煤じんフロックの浮上分離を完了した
後に停止し、同時に汚泥掻寄機２３も停止する（ステッ
プＳ２７→５２Ｂ）、加圧水弁２１は更に一定時間経過
後に停止するが（ステップ５２９）、これは浮上分離槽
２２の洗浄を行うためである。
以上によって、汚水処理の一工程が終了するが、このよ
うな処理は例えば１日に３回行われ、それに伴う有機凝
集剤溶液の作成は３日ごとに行われる。ただし、無機凝
集剤は３ケ月に１回タンクに満たすだけでよい。FIG. 1 is a system configuration diagram of the sewage treatment apparatus, and FIG. 2 is a flowchart of its operation control. In Figure 1, 1 is a sewage tank that receives sewage generated by cleaning an electrostatic precipitator (not shown), 2 is its agitator, 3 is a cleaning water tank that stores fresh water for cleaning, and 4 is a sewage tank. 1 is a sewage supply valve that leads sewage from 1, 5 is a washing water supply valve that leads sewage water from a washing water tank 10, 6 is a sewage pump that pumps out sewage and washing water, and 7 is an inorganic coagulant tank that stores an inorganic coagulant solution. , 8 is an inorganic flocculant pump that supplies an inorganic flocculant, 9 is an organic flocculant tank that dissolves the organic flocculant and stores the solution, 10 is a stirrer thereof, and 11 is an organic flocculant that supplies the organic flocculant. pump, 12
is an organic flocculant stock solution tank that stores organic flocculant stock solution,
13 is the stirrer; 14 is a stock solution injection pump for injecting the stock solution in the organic flocculant stock solution tank 12 into the organic coagulant tank 9;
15 is a dissolution water supply valve that supplies dissolution water for dissolving the organic flocculant stock solution from the cleaning water tank 3; 16 is a tubular mixer for mixing the inorganic flocculant into the waste water; The same to mix the flocculant (tubular mixer, 1
8 is a tubular flocculator that flocculates soot and dust in wastewater mixed with an inorganic flocculant and an organic flocculant to form a soot and dust floc; 19 is a pressurized water generator that creates air-dissolved water; 2
0 is a pressurized water pump that reuses and pressurizes treated water from a flotation tank, which will be described later, into the pressurized water generator; 21 is a pressurized water valve that supplies pressurized water; and 22 is a pressurized water generator that supplies air from the pressurized water generator 19 to the wastewater from the condenser 18. A flotation separation tank introduces dissolved water and floats the soot and dust flocs in the sewage; 23 is a sludge scraper that scrapes up the soot and dust flocs that have surfaced on the water surface of the flotation and separation tank 22; and 24 stores the scraped sludge. This is a sludge tank. In the above configuration, the sewage tank 1 has a capacity to receive one day's worth of sewage from an electrostatic precipitator that is cleaned several times every day. Further, the inorganic flocculant tank 7 has a capacity to treat wastewater for about three months, and the organic flocculant tank 9 has a capacity for about three days. Now, the flow of operation control of such a sewage treatment apparatus will be explained with reference to the flowchart of FIG. 2. Note that the symbol T in O in FIG. 2 indicates the passage of a predetermined time by a timer. Further, "interlock" refers to an interlocking mode in which each device is linked to perform automatic operation, and "independent" refers to an independent mode in which each device is operated independently mainly for testing purposes. First, the water level in the sewage tank 1 is detected with a level meter (not shown), and it is checked whether the water level is above the level (M level) that covers the blades of the agitator 2 (step St).
If it is above the level, start the stirrer 2 (Step S2)
, the stirrer 2 is stopped when the temperature drops below the M level (steps S3→S4). If the water level is higher than the water level (H level), the process is started (step S5). Next, it is checked in step S6) whether the water level in the organic flocculant tank 9 is above a certain level (L level), and if it is lower than that, the process enters the next organic flocculant solution preparation flow. That is, first, the stirrer 1 of the organic flocculant stock solution tank 12
3 is operated for a certain period of time by a timer (step S7 → step S8), and at the same time, the dissolved water supply valve 15 is opened and water is injected until the organic flocculant tank 9 is filled with water (H level) using a level meter (not shown) (step 39). ~511). Therefore, the agitator 10 of the organic flocculant tank 9 is operated for a certain period of time (step S12→513), and during that time, the organic flocculant liquid pump 14 is operated for a certain period of time, and a certain amount of the organic flocculant liquid is transferred to the organic flocculant tank 9. Inject (step 514
→515). In this way, when the water level in the organic flocculant tank 9 is filled, other activation conditions include that the water levels in the inorganic flocculant tank 7 and the cleaning water tank 3 are above a certain level, and that there is no failure indication. Confirm and start driving. Therefore, the pressurized water valve 21 is opened to operate the pressurized water pump 20 (Steps 316 to 31B), and at the same time, the sludge scraper 2
3 (step 519). After a certain period of time, check whether the pressurized water pressure is normal (step 520), and if normal, open the cleaning water supply valve 5 (step 521), and then turn on the sewage pump 6, inorganic flocculant pump 8, and organic flocculant pump 11. drive (step 522). After a certain period of time has passed, the cleaning water supply valve 15 is closed and the waste water supply valve 4 is opened (step 523).
). At this point, sewage treatment operation begins. The purpose of opening the cleaning water supply valve before opening the sewage supply valve 4 is to fill the mixers 16 and 17 with water and then inject the inorganic flocculant and organic flocculant, so that these flocculants with a small flow rate will drain the sewage. This is to ensure that it is distributed throughout the pipe before being taken out. After that, sewage treatment is carried out until the water level in the sewage tank 1 is below a certain level (L level), or the water level in the inorganic flocculant tank 7 or organic flocculant tank 9 is at a certain level (L level).
When the following happens, issue a termination command and terminate the process. Therefore, the sewage supply valve 4 is closed and the cleaning water supply valve 5 is opened at the same time (step 524). This is to remove the soot and dust flocs that have adhered to the inside of the coagulator 18. Meanwhile, the coagulant continues to be supplied. The sewage water remaining in the pipes is treated, and after a certain period of time, the inorganic flocculant pump 8 and the organic flocculant pump 11 are stopped (step 325). Then, after a certain period of time has elapsed, the cleaning water supply valve 5 is closed and the sewage pump 6 is stopped (step knob 526). On the other hand, the pressurized water pump 20 waits for a certain period of time after the completion command, and stops after completing flotation separation of the remaining soot and dust flocs, and at the same time, the sludge scraper 23 also stops (step S27 → 52B), the pressurized water valve 21 is further stopped after a certain period of time has elapsed (step 529), this is to clean the flotation tank 22. With the above, one step of wastewater treatment is completed, but such treatment is performed, for example, three times a day, and the accompanying preparation of the organic flocculant solution is performed every three days. However, it is only necessary to fill the tank with the inorganic flocculant once every three months.
この発明によれば、電気集じん機の洗浄汚水の処理装置
の長期間にわたる無人自動運転が可能となり、その際、
常に新鮮な有機凝集剤を用いることができる。According to this invention, long-term unmanned automatic operation of an electrostatic precipitator washing sewage treatment device is possible, and at that time,
Fresh organic flocculant can always be used.
第１図はこの発明の実施例のシステム構成図、第２図は
第１図の実施例の運転制御のフローを説明するフローチ
ャートである。
１・・・汚水タンク、３・・・洗浄用水タンク、７・・
・無機凝集剤タンク、９・・・有機凝集剤、１２・・・
有機凝集剤原液タンク、１６・・・無機凝集剤混合機、
１７・・・有機凝集剤混合器、１８・・・凝集器、１９
・・・加圧水発生装置、２２・・・浮上分離槽、２３・
・・汚泥掻寄機、２４・・・汚泥タンク。
−５３（FIG. 1 is a system configuration diagram of an embodiment of the present invention, and FIG. 2 is a flowchart explaining the flow of operation control in the embodiment of FIG. 1... Sewage tank, 3... Washing water tank, 7...
・Inorganic flocculant tank, 9...Organic flocculant, 12...
Organic flocculant stock solution tank, 16...Inorganic flocculant mixer,
17... Organic flocculant mixer, 18... Flocculator, 19
... Pressurized water generator, 22... Flotation separation tank, 23.
...Sludge scraper, 24...Sludge tank. -53(
Claims (1)
び有機凝集剤を加えて煤じんフロックを形成させ、次い
でこの汚水に空気溶解水を導入して前記煤じんフロック
を浮上させて分離する電気集じん機の洗浄汚水処理装置
において、汚水タンクの水位があるレベル以上になると
無機凝集剤タンク、有機凝集剤タンク及び洗浄用水タン
クの残量水位を検知し、有機凝集剤溶液があるレベル以
上ある場合は直ちに、またあるレベル以下の場合はある
レベルまで有機凝集剤溶液を作成して汚水処理を開始し
、前記汚水タンク、前記無機凝集剤タンク、あるいは前
記有機凝集剤タンクの水位があるレベルまで低下すると
管内洗浄を行って処理を停止することを特徴とする電気
集じん機の洗浄汚水処理装置の運転制御方法。1) Add an inorganic flocculant and an organic flocculant to the sewage generated by cleaning the electrostatic precipitator to form soot and dust flocs, and then introduce air-dissolved water into this sewage to float the soot and dust flocs. In the cleaning sewage treatment equipment of the electrostatic precipitator that separates, when the water level in the sewage tank exceeds a certain level, the remaining water levels in the inorganic flocculant tank, organic flocculant tank, and cleaning water tank are detected, and the organic flocculant solution is detected. If the water level is above this level, an organic flocculant solution is immediately prepared, and if it is below a certain level, an organic flocculant solution is prepared to a certain level and sewage treatment is started. A method for controlling the operation of an electrostatic precipitator cleaning sewage treatment device, characterized in that when the water level drops to a certain level, the inside of the pipe is cleaned and the treatment is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2090581A JPH03288589A (en) | 1990-04-05 | 1990-04-05 | Method for controlling operation of washing sewage treatment apparatus of electric precipitator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2090581A JPH03288589A (en) | 1990-04-05 | 1990-04-05 | Method for controlling operation of washing sewage treatment apparatus of electric precipitator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03288589A true JPH03288589A (en) | 1991-12-18 |
Family
ID=14002409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2090581A Pending JPH03288589A (en) | 1990-04-05 | 1990-04-05 | Method for controlling operation of washing sewage treatment apparatus of electric precipitator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03288589A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6415193A (en) * | 1987-07-08 | 1989-01-19 | Fuji Electric Co Ltd | Method and device for treatment of waste washing water from electrostatic precipitator |
| JPH0275306A (en) * | 1988-09-09 | 1990-03-15 | Ito Seisakusho:Kk | Continuous feeding of diluted flocculant solution |
-
1990
- 1990-04-05 JP JP2090581A patent/JPH03288589A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6415193A (en) * | 1987-07-08 | 1989-01-19 | Fuji Electric Co Ltd | Method and device for treatment of waste washing water from electrostatic precipitator |
| JPH0275306A (en) * | 1988-09-09 | 1990-03-15 | Ito Seisakusho:Kk | Continuous feeding of diluted flocculant solution |
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