JPH0523280Y2 - - Google Patents
Info
- Publication number
- JPH0523280Y2 JPH0523280Y2 JP1988001955U JP195588U JPH0523280Y2 JP H0523280 Y2 JPH0523280 Y2 JP H0523280Y2 JP 1988001955 U JP1988001955 U JP 1988001955U JP 195588 U JP195588 U JP 195588U JP H0523280 Y2 JPH0523280 Y2 JP H0523280Y2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- concentration
- dehydrator
- supply route
- opening
- 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.)
- Expired - Lifetime
Links
- 239000010802 sludge Substances 0.000 claims description 157
- 239000007787 solid Substances 0.000 claims description 18
- 239000002351 wastewater Substances 0.000 claims description 18
- 238000002203 pretreatment Methods 0.000 claims description 8
- 238000004062 sedimentation Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 description 11
- 238000007747 plating Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 238000000605 extraction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000004381 surface treatment Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 229910021645 metal ion Inorganic materials 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000002562 thickening agent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は汚泥の脱水前処理装置に関し、特に
金属表面処理廃水中のイオン性溶存物を不溶性固
形物（スラツジ）として沈澱せしめて除去するに
際して、通常運転時のスラツジ脱水効率を高め且
つダンプアウト時の沈澱装置の破損事故を未然に
防止するものである。[Detailed description of the invention] [Industrial application field] This invention relates to a sludge dewatering pretreatment device, and is particularly useful for removing ionic dissolved substances in metal surface treatment wastewater by precipitating them as insoluble solids (sludge). The purpose is to increase the sludge dewatering efficiency during normal operation and prevent damage to the sedimentation equipment during dump-out.
鉄鋼業、自動車工業、電気工業、化学工業など
では多量の工場廃水が排出される。例えば、冷延
または熱延鋼板を多量に生産したり利用したりす
る鉄鋼業、自動車工業分野では、鋼板表面のスケ
ール除去のため硫酸や塩酸を用いて酸洗したり、
その鋼板面に亜鉛めつき等の金属めつきを施した
りする金属表面処理工程から、多量の鉄、亜鉛、
りん酸等を含有する廃水が排出される。
A large amount of factory wastewater is discharged in the steel industry, automobile industry, electrical industry, chemical industry, etc. For example, in the steel industry and the automobile industry, which produce or use large quantities of cold-rolled or hot-rolled steel sheets, pickling is performed using sulfuric acid or hydrochloric acid to remove scale from the surface of the steel sheets.
During the metal surface treatment process, which involves applying metal plating such as galvanizing to the surface of the steel sheet, a large amount of iron, zinc,
Wastewater containing phosphoric acid, etc. is discharged.
このような金属表面処理工程中に発生する金属
イオン等含有廃水は、環境汚染防止の法規制に則
り適正に処理することが義務づけられており、従
来から種々の廃液処理方法や装置が提案されてい
る。 Wastewater containing metal ions, etc., generated during the metal surface treatment process is required to be properly treated in accordance with environmental pollution prevention laws and regulations, and various wastewater treatment methods and devices have been proposed. There is.
例えば第３図に示すものは、金属表面処理廃液
をアルカリ剤で中和処理してイオンを不溶性の固
形物にした後、固液分離処理するシステムであ
る。金属表面処理工程から排出され原水槽１に溜
められた廃水は、反応槽２にポンピングして消石
灰の如きアルカリ剤Ａを添加する。こうして、廃
水のPHを含有金属イオンの種類に合わせて適当に
調整すると、金属イオンは不溶性の水酸化物とし
て廃水中に析出する。その析出物を含む廃水を凝
集槽３に移し、例えば高分子凝集剤Ｂを更に添加
して凝集効果を高め、析出物を粗大化させて次の
脱水前処理装置４に送り、粗大化した析出物を沈
澱させて上澄み水と沈降物である濃厚スラリーと
に分離する。上澄み水は放流するか、或いは冷却
用水として再利用される。 For example, the system shown in FIG. 3 is a system in which metal surface treatment waste liquid is neutralized with an alkaline agent to make ions into insoluble solids, and then subjected to solid-liquid separation treatment. Waste water discharged from the metal surface treatment process and stored in a raw water tank 1 is pumped into a reaction tank 2 and an alkali agent A such as slaked lime is added thereto. In this way, when the pH of the wastewater is appropriately adjusted according to the type of metal ions contained, the metal ions are precipitated in the wastewater as insoluble hydroxides. The wastewater containing the precipitates is transferred to the coagulation tank 3, and for example, polymer flocculant B is further added to enhance the coagulation effect, and the precipitates are coarsened and sent to the next dehydration pretreatment device 4, where the coarse precipitates are removed. The substance is precipitated and separated into supernatant water and a thick slurry, which is the sediment. The supernatant water is either discharged or reused as cooling water.
一方、濃厚スラリーの固形物スラツジは、以下
に述べる経路を経て例えばフイルタプレスのよう
な脱水機５に送り、脱水したのち埋め立てるか或
いは資源として再利用される。 On the other hand, the solid sludge, which is a thick slurry, is sent to a dehydrator 5 such as a filter press via the route described below, and after being dehydrated, it is either landfilled or reused as a resource.
上記脱水前処理装置４は凝集槽３から送りこま
れてくる析出物が懸濁しているスラリー中の固形
分を重力により沈降させて濃厚スラリーとするシ
ツクナ６と、その濃厚スラリーをシツクナ６から
引き抜いて脱水機５に供給するための給泥経路７
と、その給泥経路７を開閉する開閉装置８と、給
泥経路７で送られたスラリーを貯える汚泥貯槽９
とを備えている。なお、１０は汚泥貯槽９内のス
ラツジを取り出して脱水機５に供給する給泥ポン
プ１０，１１はシツクナ６の底に沈積した固形物
を掻き寄せる回転式の掻き寄せ機、１２は汚泥貯
槽９の液面を検出する液面計、１３は脱水汚泥を
貯えるホツパ、Ｔはタイマ、Ｓは撹拌機、１６は
制御部である。 The dehydration pre-treatment device 4 includes a thickener 6 that uses gravity to settle the solid content in the slurry containing suspended precipitates sent from the aggregation tank 3 to form a thick slurry, and a thickener 6 that pulls out the thick slurry from the thickener 6. Sludge supply route 7 for supplying to the dehydrator 5
, an opening/closing device 8 that opens and closes the sludge supply route 7, and a sludge storage tank 9 that stores the slurry sent through the sludge supply route 7.
It is equipped with In addition, 10 is a sludge pump 10 which takes out the sludge in the sludge storage tank 9 and supplies it to the dehydrator 5, 11 is a rotary scraper that scrapes up the solid matter deposited on the bottom of the sludge tank 6, and 12 is the sludge storage tank 9. 13 is a hopper for storing dehydrated sludge, T is a timer, S is a stirrer, and 16 is a control unit.
凝集槽３からシツクナ６に供給されたスラリー
中の固形物は順次に沈降して廃水から除去されて
ゆき、固形物が分離除去された水は、円周の溢流
部６Ａから清澄な水になつて溢流する。沈降した
固形物は掻き寄せ機１１で中心部に集められ、シ
ツクナ６の底部から汚泥として引き抜かれる。 The solids in the slurry supplied from the flocculation tank 3 to the water tanker 6 are sequentially settled and removed from the wastewater, and the water from which the solids have been separated and removed is turned into clear water from the circumferential overflow part 6A. It grows and overflows. The settled solids are collected in the center by a scraper 11 and pulled out from the bottom of the sludge 6 as sludge.
その引き抜は、給泥経路７の開閉装置（例えば
排泥ポンプ）８を、タイマＴに予め設定した汚泥
引抜時間と引抜休止時間間隔で制御部１６を介し
て自動的に開閉操作することにより行う。 The extraction is carried out by automatically opening and closing the opening/closing device (for example, a sludge pump) 8 of the sludge supply path 7 via the control unit 16 at intervals of the sludge extraction time and extraction pause time set in advance in the timer T. conduct.
かくしてシツクナ６から引き抜かれた汚泥は、
汚泥貯槽９に貯えられる。液面計１２で計測され
ている汚泥貯槽９の液面レベルが所定位置に達す
ると給泥ポンプ１０が始動して、汚泥を脱水機５
に供給し脱水する。脱水した汚泥はホツパ１３に
一時貯えられる。 In this way, the sludge extracted from Situkuna 6 was
The sludge is stored in the sludge storage tank 9. When the liquid level in the sludge storage tank 9 measured by the liquid level gauge 12 reaches a predetermined position, the sludge supply pump 10 is started and the sludge is transferred to the dehydrator 5.
and dehydrated. The dehydrated sludge is temporarily stored in the hopper 13.
〔考案が解決しようとする課題〕
例えば鋼板のめつきラインから排出されてくる
めつき廃水中の金属イオン濃度は、めつきの種類
や鋼板の板幅、板厚等の寸法に応じて変動する。
したがつて、反応槽２、凝集槽３で処理されて脱
水前処理装置４のシツクナ６に送りこまれてくる
廃水のスラリー濃度も変動することとなる。その
ため、スラリーが連続的に処理され、シツクナ６
の底部から汚泥として引き抜かれる際の汚泥濃度
も必然的に変動する。その変動幅は通常運転時で
１〜10％になる。[Problems to be solved by the invention] For example, the concentration of metal ions in plating wastewater discharged from a steel plate plating line varies depending on the type of plating and dimensions such as the width and thickness of the steel plate.
Therefore, the slurry concentration of the wastewater treated in the reaction tank 2 and the coagulation tank 3 and sent to the thickener 6 of the dehydration pretreatment device 4 will also fluctuate. Therefore, the slurry is processed continuously and
The sludge concentration when extracted as sludge from the bottom of the tank also inevitably fluctuates. The fluctuation range is 1 to 10% during normal operation.
しかしながら、従来の汚泥の脱水前処理装置４
にあつては、シツクナ６の底部からの汚泥引き抜
きは、濃度変動にかかわらず、タイマＴに予め設
定した一定の時間間隔で引抜経路の開閉装置８を
オン・オフして行つていた。そこで、脱水機５は
濃度変動幅が１％〜10％に及ぶ汚泥を円滑に処理
しなければならず、脱水能力に大幅な余裕を見込
んでいたため、設備費が高価になるという問題が
あつた。 However, the conventional sludge dewatering pretreatment device 4
In this case, sludge was drawn out from the bottom of the sludge tanker 6 by turning on and off the opening/closing device 8 of the drawing path at constant time intervals set in advance by the timer T, regardless of concentration fluctuations. Therefore, the dehydrator 5 had to smoothly process sludge whose concentration ranged from 1% to 10%, and because a large margin was expected in the dewatering capacity, there was a problem of high equipment costs. Ta.
更に、酸洗ラインやめつきラインで塩酸、硫酸
等の酸やめつき液等の使用液を更新した際には、
通常運転時より遥かに高濃度の廃水が排出され
（ダンプアウト）、その高濃度のダンプアウト廃水
を反応槽２、凝集槽３を経てシツクナ６で処理す
ると短時間で大量の汚泥が発生する。そのため、
従来のタイマーＴによる一定時間間隔での排泥で
は排泥指令が遅れ、シツクナ６の底部に大量の汚
泥が溜り、掻き寄せ機１１に過負荷が掛かつてシ
ヤーピンが破損するなどの事故が発生するという
問題があつた。 Furthermore, when replacing the acids such as hydrochloric acid, sulfuric acid, or plating liquid in the pickling line or plating line,
Wastewater with a much higher concentration than during normal operation is discharged (dumpout), and when the high-concentration dumpout wastewater is passed through the reaction tank 2, flocculation tank 3, and treated in the sludge tanker 6, a large amount of sludge is generated in a short period of time. Therefore,
With conventional sludge removal at fixed time intervals using the timer T, the sludge removal command is delayed, a large amount of sludge accumulates at the bottom of the sludge 6, and accidents such as overloading the scraper 11 and damage to the shear pin occur. There was a problem.
そこでこの考案の目的とするところは、脱水機
の汚泥脱水効率を向上させて脱水機設備費を低減
し、且つダンプアウトのような過渡時のシツクナ
破損等のトラブルを解消して安定な廃水処理を可
能とする汚泥の脱水前処理装置を提供することに
ある。 Therefore, the purpose of this invention is to improve the sludge dewatering efficiency of the dehydrator, reduce the dehydrator equipment cost, and eliminate troubles such as damage to the strainer during transients such as dumpouts, resulting in stable wastewater treatment. An object of the present invention is to provide a sludge dewatering pre-treatment device that enables sludge dewatering.
上記の目的を達成するこの考案は、廃水を中和
処理して生成された固形物を沈降させ沈澱汚泥と
するシツクナと、その沈澱汚泥を脱水機に供給す
る給泥経路と、その給泥経路をタイマの設定時間
間隔で開閉する開閉装置とを備えた汚泥脱水前処
理装置において、前記脱水機を常用運転用とバツ
クアツプ運転用の２系列設けるとともに、前記シ
ツクナの懸濁固形物濃度を沈降途中で計測する汚
泥濃度計と前記給泥経路の懸濁固形物濃度を測定
する汚泥濃度計を設け、この給泥経路の汚泥濃度
計の出力が所定値以下になつたとき前記給泥経路
の開閉装置をオフとし、前記シツクナの汚泥濃度
計の出力が所定値以上のとき前記給泥経路の開閉
装置とバツクアツプ運転用脱水機とをオンとする
ように構成した。
This invention, which achieves the above objectives, consists of a system that neutralizes wastewater and settles the generated solids to form settled sludge, a sludge supply route that supplies the settled sludge to a dehydrator, and a sludge supply route that supplies the settled sludge to a dehydrator. In the sludge dewatering pre-treatment equipment equipped with an opening/closing device that opens and closes at time intervals set by a timer, the dehydrator is provided in two lines, one for regular operation and one for back-up operation, and the concentration of suspended solids in the sludge is controlled during sedimentation. A sludge concentration meter that measures the suspended solids concentration in the sludge supply route and a sludge concentration meter that measures the suspended solids concentration in the sludge supply route are provided, and when the output of the sludge concentration meter in the sludge supply route becomes less than a predetermined value, the sludge supply route is opened or closed. The device is turned off, and when the output of the sludge concentration meter of the shaker is above a predetermined value, the opening/closing device of the sludge supply route and the dehydrator for backup operation are turned on.
給泥経路の開閉装置の開操作をタイマのオン信
号で開始する。そして給泥経路の汚泥濃度計の検
出値が予め設定された下限濃度値にまで低下した
とき、給泥経路の開閉装置をオフとしてシツクナ
からの汚泥の引き抜きを停止する。そのため、脱
水機において脱水効率の低い低汚泥濃度で脱水す
ることがなくなり、脱水効率が向上する。
The opening operation of the opening/closing device of the mud supply route is started by the ON signal of the timer. When the detected value of the sludge concentration meter in the sludge supply route drops to a preset lower limit concentration value, the opening/closing device for the sludge supply route is turned off and the extraction of sludge from the sludge tanker is stopped. Therefore, the dehydrator does not dewater at a low sludge concentration, which causes low dewatering efficiency, and the dewatering efficiency improves.
一方、シツクナの汚泥濃度計の出力信号が予め
設定された高濃度レベルに達した時には、タイマ
のオン信号に優先して給泥経路の開閉装置とバツ
クアツプ運転用脱水機とをオンさせる。そのた
め、廃水濃度が非常に高くなるダンプアウト時で
もシツクナは過負荷となることはなく、装置の破
損は未然に防止される。 On the other hand, when the output signal of the sludge concentration meter of the sludge reaches a preset high concentration level, the sludge supply route opening/closing device and the backup operation dewatering machine are turned on in priority to the timer on signal. Therefore, even during a dumpout when the concentration of wastewater is extremely high, the system will not be overloaded, and damage to the equipment will be prevented.
以下、本考案の実施例を図面に基づいて説明す
る。なお、従来と同一または相当部分には同一の
符号を付し、その詳細な説明は省略する。
Hereinafter, embodiments of the present invention will be described based on the drawings. Note that the same reference numerals are given to the same or corresponding parts as in the conventional art, and detailed explanation thereof will be omitted.
この実施例の脱水前処理装置４は、従来と同じ
くシツクナ６と、そのシツクナ６の沈澱汚泥を脱
水機に供給する給泥経路７と、その給泥経路７を
開閉する開閉装置としての排泥ポンプ８と、その
排泥ポンプ８の運転開始時間間隔を設定するタイ
マＴを備えている。更に、シツクナ６内を沈降し
ている懸濁固形物濃度を計測する汚泥濃度計２０
（以下単に汚泥濃度計という）センサをシツクナ
６内に設ける。この汚泥濃度計２０のセンサの設
置位置は固定物が懸濁状態で沈降している部分で
あればどこでもよいが、あまりシツクナ６の底に
近いと沈積した固形物の濃度を計測するおそれが
あるため、第１図に示されるように、シツクナ６
の深さ方向の中ほどの位置であつて、回転式掻き
寄せ機１１における掻き寄せ羽根より上の位置が
好適である。さらに、給泥経路７には懸濁固形物
濃度を測定する汚泥濃度計２１（以下引き抜き汚
泥濃度計２１という）を設けてある。 The dewatering pre-treatment device 4 of this embodiment, as in the conventional case, includes a sludge feeder 6, a sludge supply path 7 for supplying the settled sludge of the sludge 6 to the dehydrator, and a sludge discharge device serving as an opening/closing device for opening and closing the sludge feed path 7. It includes a pump 8 and a timer T that sets the time interval for starting operation of the sludge pump 8. Furthermore, a sludge concentration meter 20 is installed to measure the concentration of suspended solids settling inside the sludge tanker 6.
A sensor (hereinafter simply referred to as a sludge concentration meter) is installed in the sludge tanker 6. The sensor of this sludge concentration meter 20 may be installed anywhere as long as the fixed substances are settling in a suspended state, but if it is too close to the bottom of the sludge 6, there is a risk of measuring the concentration of the settled solids. Therefore, as shown in FIG.
The preferred position is the middle in the depth direction of the rotary scraper 11 and above the scraping blades of the rotary scraper 11. Further, the sludge supply path 7 is provided with a sludge concentration meter 21 (hereinafter referred to as the drawn sludge concentration meter 21) for measuring the concentration of suspended solids.
又、脱水機５は従来より小型で処理能力の小さ
いものを常用運転用として設置すると共に、更に
もう１系列の給泥ポンプ２２と脱水機２３とホツ
パ２４をバツクアツプ運転用として設けてある。 Further, the dehydrator 5 is smaller in size and has lower processing capacity than the conventional one, and is installed for regular operation, and one more series of mud supply pump 22, dehydrator 23, and hopper 24 is provided for backup operation.
そして、排泥ポンプ８はタイマＴの信号で始動
を初め、引き抜き汚泥濃度計２１の検出濃度が所
定値以下になつたとき停止され、また、汚泥濃度
計２０の出力が所定値以上のときはタイマＴの出
力信号に優先して給泥経路の開閉装置８とバツク
アツプ運転用経路の給泥ポンプ２２と脱水機２３
とをオンとするように、制御部１６で制御するよ
うにしてある。 The sludge pump 8 is started by a signal from the timer T, and is stopped when the detected concentration of the sludge concentration meter 21 becomes less than a predetermined value, and when the output of the sludge concentration meter 20 is more than a predetermined value. The opening/closing device 8 of the slurry supply route, the slurry supply pump 22 of the backup operation route, and the dehydrator 23 are given priority over the output signal of the timer T.
The control unit 16 is configured to control the switch so that the switch is turned on.
次に作用を説明する。 Next, the action will be explained.
タイマＴには予め給泥経路の開閉装置である排
泥ポンプ８のオン時間間隔が、通常運転時を基準
として設定される。 The timer T is set in advance with an on-time interval of the sludge pump 8, which is an opening/closing device for the sludge supply path, with reference to normal operation.
通常運転処理時には、タイマＴのオン信号をう
けて制御部１６から出されるオン指令で排泥ポン
プ８が始動し、シツクナ６の沈降分離汚泥が引き
抜かれて汚泥貯槽９に送られる。そして、引き抜
き汚泥濃度計２１で計測されている給泥経路７内
の引き抜き汚泥濃度が設定下限値である例えば２
％に低下すると制御部１６から引き抜き停止指令
が出されて、排泥ポンプ８は停止される。これ
は、脱水機５を効率良く使用するためである。 During normal operation processing, the sludge pump 8 is started in response to an ON command issued from the control unit 16 in response to an ON signal from the timer T, and the sedimented and separated sludge from the sludge pump 6 is drawn out and sent to the sludge storage tank 9. Then, the drawn sludge concentration in the sludge supply route 7 measured by the drawn sludge concentration meter 21 is the set lower limit value, for example 2
%, the control unit 16 issues a withdrawal stop command, and the sludge pump 8 is stopped. This is to use the dehydrator 5 efficiently.
因に、鋼板めつきラインからの濃度１〜10％範
囲の廃水を反応槽２、凝集槽３を経てシツクナ６
でで処理し、排泥ポンプ８で引き抜き、フイルタ
プレス５で脱水した場合の、引き抜き汚泥濃度と
乾き汚泥の濾過速度との関係を実験したところ第
２図に示すような結果が得られた。すなわち、引
き抜き濃度が高い程脱水効率が高くなることが明
らかで、例えば濃度１％の汚泥の脱水濾過速度
（およそ１Kg／m2・Ｈ）は、濃度６％の汚泥の脱
水濾過速度（およそ６Kg／m2・Ｈ）の1/6になつ
てしまうことが確認された。 Incidentally, wastewater with a concentration range of 1 to 10% from the steel plate plating line is passed through reaction tank 2 and coagulation tank 3 to Shitsukuna 6.
An experiment was conducted to determine the relationship between the concentration of sludge drawn out and the filtration rate of the dried sludge when the sludge was treated with water, extracted with the sludge pump 8, and dewatered with the filter press 5, and the results shown in FIG. 2 were obtained. In other words, it is clear that the higher the withdrawal concentration, the higher the dewatering efficiency. For example, the dewatering filtration rate of sludge with a concentration of 1% (approximately 1 Kg/m 2 H) is the dewatering filtration rate of sludge with a concentration of 6% (approximately 6 kg/m2H). / m2・H) was confirmed to be 1/6.
なお、汚泥貯槽９の液面計１２の指示が或るレ
ベル以上の時には制御部１６から排泥ポンプ８の
運転停止指令が出されて、汚泥の溢流が防止され
るようにしてある。 Incidentally, when the indication on the liquid level gauge 12 of the sludge storage tank 9 is above a certain level, a command to stop the operation of the sludge pump 8 is issued from the control section 16 to prevent sludge from overflowing.
通常運転中にめつきラインで使用めつき液の更
新が行われると、高濃度のめつき廃水がラインか
らダンプアウトされてくる。その場合の脱水前処
理装置４は、ダンプアウトに対応するべく操作さ
れる。 When the plating liquid used in the plating line is renewed during normal operation, highly concentrated plating wastewater is dumped out from the line. In that case, the dehydration pretreatment device 4 is operated to cope with dumpout.
すなわち、ダンプアウト時には、シツクナ６の
深さのほぼ中央部に設けた汚泥濃度計２０の出力
信号が予め設定された高濃度レベル以上に達す
る。例えば通常時は汚泥濃度100ppm程度である
が、ダンプアウトによる異常時は500〜2000ppm
になる。そこで、汚泥濃度計２０の検出値が予め
設定した500ppmとなつた時点で、制御部１６か
らは、たとえタイマＴの引き抜き休止時間中であ
つても、排泥ポンプ８の運転指令、及びバツクア
ツプ運転用経路の給泥ポンプ２２と脱水機２３と
の運転指令が出される。これにより、脱水処理能
力は倍増されるから、シツクナ６からの汚泥引き
抜きを連続的に行うことが可能となり、シツクナ
６の底に汚泥が過剰に沈積することによる掻き寄
せ機１１の破損等の事故は防止できる。このダン
プアウト処理時の場合の排泥ポンプ８の停止は、
通常時と同様で、引き抜き汚泥濃度計２１の指示
値が２％程度となつたとき停止される。 That is, at the time of dumpout, the output signal of the sludge concentration meter 20 provided approximately at the center of the depth of the dumper 6 reaches a preset high concentration level or higher. For example, in normal times the sludge concentration is around 100ppm, but in abnormal situations due to dumpouts it is 500 to 2000ppm.
become. Therefore, when the detected value of the sludge concentration meter 20 reaches the preset value of 500 ppm, the control unit 16 issues an operation command for the sludge pump 8 and a back-up operation, even during the timer T's withdrawal pause time. An operation command is issued for the mud supply pump 22 and dehydrator 23 in the usage route. As a result, the dewatering capacity is doubled, making it possible to continuously pull out sludge from the sludge tanker 6, resulting in accidents such as damage to the scraper 11 due to excessive sludge deposits at the bottom of the sludge tanker 6. can be prevented. Stopping the sludge pump 8 during this dumpout process is as follows:
As in normal times, the operation is stopped when the indicated value of the drawn sludge concentration meter 21 reaches about 2%.
なお、上記実施例では、シツクナ６からの排泥
引抜経路７の開閉装置として排泥ポンプ８を設け
たものを説明したが、シツクナ６と汚泥貯槽９と
の間に落差があれば、自動弁としてもよい。 In the above embodiment, the sludge pump 8 was provided as an opening/closing device for the sludge extraction path 7 from the sludge tanker 6. However, if there is a head difference between the sludge tank 9 and the sludge tank 6, an automatic valve is installed. You can also use it as
以上説明したように、この考案の汚泥の脱水前
処理装置にあつては、シツクナ底部からの汚泥引
き抜きにあたり、引き抜き開始はタイマの信号で
行い、引き抜き停止は引き抜かれる汚泥の濃度検
出信号で行うものとしたため、脱水機に送る汚泥
濃度を脱水効率の高い範囲に維持できて、脱水効
率を向上せしめ、ひいては脱水設備費を低減でき
るという効果が得られる。また更に、シツクナに
は汚泥濃度計を設置して、ダンプアウトのような
異常高濃度が検出されたときは、この汚泥濃度計
が検出した値のみに基づいてバツクアツプ脱水経
路を運転して、全体の脱水処理能力を向上させる
ことにより、シツクナから連続的に汚泥を引き抜
くものとしたため、大量汚泥の発生によるシツク
ナの破損等の事故が未然に防止できて、安定した
運転が可能という効果が得られる。
As explained above, in the sludge dewatering pre-treatment device of this invention, when drawing sludge from the bottom of the sludge, the drawing is started by a timer signal, and the drawing is stopped by the concentration detection signal of the sludge to be drawn. As a result, the sludge concentration sent to the dehydrator can be maintained within a range with high dewatering efficiency, thereby improving dewatering efficiency and reducing dewatering equipment costs. Furthermore, a sludge concentration meter is installed in the sludge, and when an abnormally high concentration such as a dumpout is detected, the back-up dewatering route is operated based only on the value detected by this sludge concentration meter, and the entire By improving the dewatering capacity of the sludge, sludge is continuously extracted from the sludge, which prevents accidents such as damage to the sludge due to the generation of large amounts of sludge, and enables stable operation. .
第１図は此の考案の一実施例の処理系統図、第
２図はこの考案の装置による引き抜き汚泥濃度と
乾き汚泥の濾過速度との関係を示すグラフ、第３
図は従来の、廃水処理装置の処理系統図である。
４は脱水前処理装置、５，２３は脱水機、６は
シツクナ、７は給泥経路、８は給泥経路の開閉装
置、９は汚泥貯槽、１０，２２は給泥ポンプ、１
６は制御部である。
Fig. 1 is a processing system diagram of an embodiment of this invention, Fig. 2 is a graph showing the relationship between the sludge concentration drawn by the device of this invention and the filtration rate of dry sludge, and Fig. 3
The figure is a treatment system diagram of a conventional wastewater treatment device. 4 is a dewatering pre-treatment device, 5 and 23 are dewatering machines, 6 is a sludge feeder, 7 is a sludge supply route, 8 is an opening/closing device for the sludge supply route, 9 is a sludge storage tank, 10 and 22 are sludge pumps, 1
6 is a control section.
Claims (1)
せ沈澱汚泥とするシツクナと、その沈澱汚泥を脱
水機に供給する給泥経路と、その給泥経路をタイ
マの設定時間間隔で開閉する開閉装置とを備えた
汚泥脱水前処理装置において、前記脱水機を常用
運転用とバツクアツプ運転用の２系列設けるとと
もに、前記シツクナの懸濁固形物濃度を沈降途中
で計測する汚泥濃度計と前記給泥経路の懸濁固形
物濃度を測定する汚泥濃度計を設け、この給泥経
路の汚泥濃度計の出力が所定値以下になつたとき
前記給泥経路の開閉装置をオフとし、前記シツク
ナの汚泥濃度計の出力が所定値以上のとき前記給
泥経路の開閉装置とバツクアツプ運転用脱水機と
をオンとするように構成したことを特徴とする汚
泥脱水前処理装置。 A sludge that neutralizes wastewater and settles the generated solids to form precipitated sludge, a sludge supply route that supplies the precipitated sludge to the dehydrator, and an opening/closing system that opens and closes the sludge supply route at time intervals set by a timer. In the sludge dewatering pre-treatment device, the dehydrator is provided in two lines, one for regular operation and one for backup operation, and a sludge concentration meter for measuring the concentration of suspended solids in the sludge during sedimentation, and the sludge feeder. A sludge concentration meter is installed to measure the concentration of suspended solids in the route, and when the output of the sludge concentration meter in the sludge supply route becomes less than a predetermined value, the opening/closing device of the sludge supply route is turned off, and the sludge concentration in the sludge is adjusted. 1. A sludge dewatering pre-treatment device, characterized in that the sludge supply path opening/closing device and the backup operation dehydrator are turned on when the output of the sludge meter is equal to or higher than a predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988001955U JPH0523280Y2 (en) | 1988-01-11 | 1988-01-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988001955U JPH0523280Y2 (en) | 1988-01-11 | 1988-01-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01107500U JPH01107500U (en) | 1989-07-20 |
| JPH0523280Y2 true JPH0523280Y2 (en) | 1993-06-15 |
Family
ID=31202298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988001955U Expired - Lifetime JPH0523280Y2 (en) | 1988-01-11 | 1988-01-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0523280Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013034956A (en) * | 2011-08-09 | 2013-02-21 | Swing Corp | Method for treating sludge |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5581798A (en) * | 1978-12-18 | 1980-06-20 | Toshiba Corp | Sludge drawing controller for sludge concentration tank |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5530578Y2 (en) * | 1974-04-10 | 1980-07-21 |
-
1988
- 1988-01-11 JP JP1988001955U patent/JPH0523280Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5581798A (en) * | 1978-12-18 | 1980-06-20 | Toshiba Corp | Sludge drawing controller for sludge concentration tank |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01107500U (en) | 1989-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3707464A (en) | Process for clarifying an oil-solids contaminated aqueous stream | |
| US3959133A (en) | Alum recovery and waste disposal in water treatment | |
| EP0377603B1 (en) | Clarification process | |
| US3930879A (en) | Closed alkaline wash water system for cleaning metal parts | |
| CN105110510A (en) | Desulfurization waste water treatment system and treatment method capable of preventing sewage blocking | |
| CN108689582A (en) | Sludge dewatering treatment device and processing method | |
| US4018680A (en) | Process for separating iron, zinc and lead from flue dust and/or flue sludge | |
| JPH0523280Y2 (en) | ||
| US5080806A (en) | Decontamination treatment of process water | |
| EP2644574A1 (en) | Method and plant for treating waste water to eliminate selenium | |
| JP4931522B2 (en) | Smoke treatment liquid treatment equipment | |
| JP3314575B2 (en) | Sedimentation equipment | |
| JP2000263086A (en) | Waste water treatment apparatus | |
| KR101237412B1 (en) | Filter washing device in a upward-flowing purification system | |
| JP4569772B2 (en) | Sludge concentration apparatus and sludge concentration method | |
| US3494864A (en) | Water purification process | |
| JP3836646B2 (en) | Release agent processing method and apparatus | |
| JP2001070997A (en) | Treatment method for filtrate and washing waste water in sludge dehydrator | |
| JPS6119834Y2 (en) | ||
| KR200270150Y1 (en) | Apparatus for removing pollutants in outflow water of abandoned mine by surface electrochemical reaction | |
| CN213834921U (en) | Sand regeneration sewage treatment system | |
| CN214571183U (en) | Environment-friendly treatment equipment for heavy metal-containing sewage | |
| JP2003326110A (en) | Flocculation and separation apparatus | |
| KR960011886B1 (en) | Waste water treatment method | |
| JP4016564B2 (en) | Treatment method for fluorine-containing wastewater |