JP4178123B2 - Wastewater treatment facility - Google Patents

Wastewater treatment facility Download PDF

Info

Publication number
JP4178123B2
JP4178123B2 JP2004099309A JP2004099309A JP4178123B2 JP 4178123 B2 JP4178123 B2 JP 4178123B2 JP 2004099309 A JP2004099309 A JP 2004099309A JP 2004099309 A JP2004099309 A JP 2004099309A JP 4178123 B2 JP4178123 B2 JP 4178123B2
Authority
JP
Japan
Prior art keywords
sewage
storage tank
tank
treatment facility
wastewater treatment
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
Application number
JP2004099309A
Other languages
Japanese (ja)
Other versions
JP2005279515A (en
Inventor
山本  仁
英一 深澤
佳樹 柏崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toho Titanium Co Ltd
Original Assignee
Toho Titanium Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toho Titanium Co Ltd filed Critical Toho Titanium Co Ltd
Priority to JP2004099309A priority Critical patent/JP4178123B2/en
Publication of JP2005279515A publication Critical patent/JP2005279515A/en
Application granted granted Critical
Publication of JP4178123B2 publication Critical patent/JP4178123B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Landscapes

  • Sewage (AREA)

Description

本発明は、汚水発生源で発生した汚水を排水流路を通じて汚水を処理するための排水処理設備に係り、特に汚水から発生する腐食性ガスによって排水流路周辺の装置構成材が腐食することを防止する技術に関する。   The present invention relates to a wastewater treatment facility for treating sewage generated at a sewage generation source through a drainage channel, and in particular, corrosive gas generated from the sewage corrodes equipment components around the drainage channel. It relates to technology to prevent.

排水処理設備は、たとえば製造工場などの各種工程で発生する汚水を処理する装置として、汚水に含まれる固形物を除去するために利用されている(たとえば、特許文献1参照)。例えば排水処理設備100は、沈殿槽として貯留槽101を備えている。貯留槽101は、図2に示すように、上面が鉄製のグレーティングで構成されており、排水流路102の末端部に設けられている場合が多い。   Wastewater treatment equipment is used as an apparatus for treating sewage generated in various processes such as a manufacturing factory, for example, to remove solids contained in sewage (see, for example, Patent Document 1). For example, the wastewater treatment facility 100 includes a storage tank 101 as a settling tank. As shown in FIG. 2, the storage tank 101 has an upper surface made of an iron grating, and is often provided at the end of the drainage channel 102.

特開平11−226323 (詳細説明)JP-A-11-226323 (Detailed explanation)

このような排水処理設備100では、汚水発生源から発生した汚水が排水流路102を通じて貯留槽101に排出され、そこで汚水に含まれていた固形物が沈殿して分離除去される。そして、固形物が分離除去された汚水がポンプ103を通じて排水処理設備に送液される。   In such a wastewater treatment facility 100, the sewage generated from the sewage generation source is discharged to the storage tank 101 through the drainage flow path 102, where the solid matter contained in the sewage is precipitated and separated and removed. Then, the sewage from which the solid matter is separated and removed is sent to the wastewater treatment facility through the pump 103.

このような排水処理設備100は、たとえば四塩化チタンのような金属塩化物の製造工程に設置されている。金属塩化物の製造工程(以下「塩化工程」と呼ぶ場合がある)で発生した鉄やマンガンなどの塩化物は水洗処理される過程で塩酸を含む酸性汚水となる。この酸性汚水が排水流路102を通じて貯留槽101に排出される。   Such a wastewater treatment facility 100 is installed in a production process of a metal chloride such as titanium tetrachloride. Chlorides such as iron and manganese generated in the metal chloride production process (hereinafter sometimes referred to as “chlorination process”) become acidic sewage containing hydrochloric acid in the process of being washed with water. This acidic sewage is discharged to the storage tank 101 through the drainage channel 102.

この際、汚水中に含まれる塩酸が気化または飛散してガスあるいはミストとして発生するため、これらの塩酸ガスあるいはミストによって、排水流路102の上部を構成している鉄製グレーティングあるいは排水流路102の周囲に配置されている生産設備への腐食を助長していた。   At this time, hydrochloric acid contained in the sewage is vaporized or scattered and generated as a gas or mist. Therefore, the hydrochloric acid gas or mist of the iron grating or the drainage channel 102 constituting the upper part of the drainage channel 102 is used. It promoted corrosion to the production equipment located around.

以上のような問題は、排水処理設備が塩化工程の汚水処理に適用された場合に限らず、腐食性ガスを発生する汚水を処理するために適用された場合にも同様に生じていた。   The problems as described above are not limited to the case where the wastewater treatment facility is applied to sewage treatment in the chlorination process, but also occur when applied to treat sewage that generates corrosive gas.

また、上記のような腐食性ガスによる腐食の問題に加えて、汚水に含まれる固形物が排水流路102の底部や貯留槽101に沈積することがあったため、円滑に汚水を処理することができなかった。   Further, in addition to the problem of corrosion due to the corrosive gas as described above, the solid matter contained in the sewage may be deposited in the bottom of the drainage channel 102 or the storage tank 101, so that the sewage can be treated smoothly. could not.

このように腐食性ガスの発生を伴い、しかも固形分を含む汚水を効率良く排水できる処理設備が望まれていた。   Thus, there has been a demand for a treatment facility that can efficiently discharge wastewater containing solids with generation of corrosive gas.

したがって、本発明の目的は、汚水から発生する腐食性ガスによって排水流路やその周囲に配置されている設備に対する腐食を防止するともに、汚水に含まれる固形物を効率的に処理することができる排水処理設備を提供することを目的としている。   Therefore, the object of the present invention is to prevent the corrosive gas generated from the sewage from corroding the drainage channel and the equipment disposed around it, and to efficiently treat the solid matter contained in the sewage. The purpose is to provide wastewater treatment facilities.

上記したような課題に鑑みて鋭意検討を重ねてきたところ、汚水を排水するための排水流路と該排水流路の途中に設けた分離槽および排水流路の末端に設けた貯留槽から構成された排水設備全体を密閉化し、該密閉化された排水設備の空間部を減圧吸引下に保持したことを特徴とする排水処理設備を用いることにより、前記した課題を効果的に解決できることを見出し、本発明を完成するに至った。   As a result of intensive studies in view of the above-mentioned problems, it is composed of a drainage channel for draining sewage, a separation tank provided in the middle of the drainage channel, and a storage tank provided at the end of the drainage channel. The above-described problems can be effectively solved by using a wastewater treatment facility characterized in that the entire drainage facility is sealed and the space of the sealed drainage facility is held under vacuum suction. The present invention has been completed.

即ち、本発明の排水処理設備は、汚水を排水するための排水流路と排水流路の途中に設けた分離槽と、排水流路の末端に設けた貯留槽と、貯留槽の汚水の一部を排水流路の上流側に戻すための配管および送液ポンプとから構成された排水設備全体を密閉化し、密閉化された排水設備の空間部を減圧吸引下に保持したことを特徴とする。
That is, waste water treatment facility of the present invention, a drain passage for draining sewage, and separation tank provided in the middle of the drainage channel, a reservoir provided at the end of the drain passage, the sewage reservoir The entire drainage system composed of a pipe for returning a part of the drainage channel to the upstream side of the drainage channel and the liquid feed pump is sealed, and the space of the sealed drainage system is held under vacuum suction. To do.

また分離槽は、汚水に含まれる固形物を該汚水から分離するために供されることを特徴とする。また、貯留槽の内部には、沈殿槽内の汚水を撹拌するための撹拌装置を備えていることを特徴とし、貯留槽が内部タンクと外部タンクから構成された二重構造を有して、内部タンクと外部タンクとの空間部に汚水漏洩検知器を設けたことを特徴とする。

Further , the separation tank is characterized in that it is provided for separating solids contained in the sewage from the sewage. Further, the inside of the storage tank is equipped with a stirring device for stirring the sewage in the sedimentation tank, and the storage tank has a double structure composed of an internal tank and an external tank, A sewage leakage detector is provided in the space between the internal tank and the external tank.

本発明の排水処理設備を構成する排水流路と分離槽および貯留槽全体が密閉化され、しかも当該設備内の空間部が減圧吸引されている。このため、汚水発生源から排出される汚水から腐食性ガスが発生しても、腐食性ガスは系外の洗浄設備に減圧吸引されるので排水流路内への滞留や、排水流路の外部への漏出を防止することができる。その結果、汚水から発生する腐食性ガスによる排水流路やその周囲に配置されている設備の腐食を効果的に防止することができる。   The drainage flow path, the separation tank and the entire storage tank constituting the wastewater treatment facility of the present invention are hermetically sealed, and the space in the facility is sucked under reduced pressure. For this reason, even if corrosive gas is generated from the sewage discharged from the sewage generation source, the corrosive gas is sucked into the cleaning equipment outside the system under reduced pressure, so that it stays in the drainage channel or the outside of the drainage channel. Leakage into can be prevented. As a result, it is possible to effectively prevent corrosion of the drainage flow path and the equipment disposed around it due to the corrosive gas generated from the sewage.

本発明の排水処理設備を構成する排水流路の末端に設けられた貯留槽の汚水の一部を排水流路の上流側に戻すための配管と送液ポンプを備えているので、排水流路の上流側に戻された汚水は、新規に発生した汚水と共に貯留槽に向かって排水される。このため、排水流路底部に沈積する傾向にある汚水中の固形物を効果的に下流に押し流すことができ、排水流路を清浄化することができる。   Since it is provided with a pipe and a liquid feed pump for returning a part of the sewage in the storage tank provided at the end of the drainage channel constituting the wastewater treatment facility of the present invention to the upstream side of the drainage channel, the drainage channel The sewage returned to the upstream side is drained toward the storage tank together with newly generated sewage. For this reason, the solid substance in the sewage which tends to be deposited at the bottom of the drainage channel can be effectively washed away downstream, and the drainage channel can be cleaned.

排水流路の途中には、分離槽を設けており、汚水に含まれる比較的大きな固形物を、排水流路の末端に設けた貯留槽に流入する前に、効果的に分離することができる。加えて、貯留槽の内部には、この貯留槽内の汚水を撹拌するための撹拌装置を備えているため、汚水に含まれている微細な固形物を汚水中に分散状態に維持することができる。このため、貯留槽内に固形分を沈積または滞留させることなく、別に設けた排水処理設備に送液することができる。   A separation tank is provided in the middle of the drainage channel, so that a relatively large solid contained in the sewage can be effectively separated before flowing into a storage tank provided at the end of the drainage channel. . In addition, since the inside of the storage tank is equipped with a stirring device for stirring the sewage in the storage tank, it is possible to maintain the fine solids contained in the sewage in a dispersed state in the sewage. it can. For this reason, liquid can be sent to the wastewater treatment facility provided separately, without solid content being deposited or retained in the storage tank.

(1)実施形態の構成
以下、本発明の一実施形態について図面を参照して説明する。図1は本発明の実施形態に係る排水処理設備10を上方からみた概略断面図である。本実施形態では、排水処理設備10がたとえば金属塩化物の製造工程に適用され、その塩化工程における汚水発生源(図示略)で発生した鉄やマンガンなどの塩化物を含んだ汚水を処理するために利用されている。
(1) Configuration of Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic sectional view of a wastewater treatment facility 10 according to an embodiment of the present invention as viewed from above. In the present embodiment, the wastewater treatment facility 10 is applied to, for example, a metal chloride manufacturing process, and treats sewage containing chlorides such as iron and manganese generated in a sewage generation source (not shown) in the chlorination process. Has been used.

排水処理設備10は、排水流路12の末端部に貯留槽11を備えている。貯留槽11は、製造工場の排水処理設備に通常用いられているタンクであり、酸性の汚水に耐える材質で構成することが好ましい。例えば、繊維強化プラスチック(FRP:Fiber Reinforced Plastic)で構成することができる。   The wastewater treatment facility 10 includes a storage tank 11 at the end of the drainage flow path 12. The storage tank 11 is a tank usually used for wastewater treatment equipment in a manufacturing factory, and is preferably made of a material that can withstand acidic sewage. For example, it can be composed of fiber reinforced plastic (FRP).

また、貯留槽11には、攪拌装置15が汚水中に浸漬配置されており、貯留槽11に導かれた汚水中に鉱石やコークスの固形物を汚水中に分散させることができる。その結果、汚水中の固形物が沈殿することを効果的に抑制することができる。   Moreover, the stirrer 15 is immersed and disposed in the sewage in the storage tank 11, and ore and coke solids can be dispersed in the sewage in the sewage introduced to the storage tank 11. As a result, it is possible to effectively suppress the precipitation of solid matter in the sewage.

貯留槽11において固形物が懸濁された汚水は、送液ポンプ13により、別の排水処理設備(図示略)に送液されて処理される。   The sewage in which the solid matter is suspended in the storage tank 11 is sent to another wastewater treatment facility (not shown) by the liquid feed pump 13 for processing.

貯留槽11には、貯留槽11および排水流路12の上記密閉構造内に形成される空間部で発生する塩酸ガスまたはミストを減圧吸引するための減圧装置14が設けられている。減圧装置14としては、たとえば吸引ブロワが挙げられる。減圧装置14は、たとえば配管(図示略)を通じて貯留槽11に接続された排ガス洗浄部(図示略)に係合されており、排ガス洗浄部では、そこに吸引されたガスが処理される。   The storage tank 11 is provided with a decompression device 14 for vacuum suction of hydrochloric acid gas or mist generated in the space formed in the sealed structure of the storage tank 11 and the drainage flow path 12. An example of the decompression device 14 is a suction blower. The decompression device 14 is engaged with, for example, an exhaust gas cleaning unit (not illustrated) connected to the storage tank 11 through a pipe (not illustrated), and the exhaust gas cleaning unit processes the gas sucked therein.

尚、該排水流路12の上部は、塩酸等の腐食性ガスに耐える樹脂製の蓋で密閉化することが好ましい。蓋は一体形式のものでも、あるいは、分割した形式の蓋を用いることもできる。分割した形式の蓋を複数用いる場合には、排水流路12の内部が減圧吸引できるように蓋同士の隙間がないよう密接して配置することが好ましい。   The upper part of the drainage channel 12 is preferably sealed with a resin lid that can withstand corrosive gas such as hydrochloric acid. The lid may be an integral type, or a divided type lid may be used. When a plurality of divided types of lids are used, it is preferable that the lids are arranged closely so that there is no gap between the lids so that the inside of the drainage channel 12 can be sucked under reduced pressure.

貯留槽11は、外部タンクと内部タンクから構成された二重構造とすることが好ましい。貯留槽11を二重構造とすることで、内部タンクに亀裂等が発生した場合にも、外部タンクで受けることができ、環境汚染を効果的に防止することができる。   The storage tank 11 is preferably a double structure composed of an external tank and an internal tank. By making the storage tank 11 have a double structure, even if a crack or the like occurs in the internal tank, it can be received by the external tank, and environmental pollution can be effectively prevented.

この際、外部タンクと内部タンクとの空間部には、汚水漏洩検知器を設けても良い。このような検知器を設置することで内部タンクの亀裂等によう汚水の漏洩を迅速に知ることができる。   At this time, a sewage leakage detector may be provided in the space between the external tank and the internal tank. By installing such a detector, it is possible to quickly know the leakage of sewage, such as a crack in the internal tank.

貯留槽11には、排水流路12の上流側に係合した配管16が設けられている。配管16の途中には循環ポンプ(送液ポンプ)17が設けられており、貯留槽11内に蓄積した汚水の一部が排水流路12の上流側に戻され、汚水発生源からの新規な汚水と合流し、再度、貯留槽11に向かって流れるように配置することが好ましい。   The storage tank 11 is provided with a pipe 16 that is engaged with the upstream side of the drainage channel 12. A circulation pump (liquid feed pump) 17 is provided in the middle of the pipe 16, and a part of the sewage accumulated in the storage tank 11 is returned to the upstream side of the drainage flow path 12, and a new sewage generation source is provided. It is preferable to arrange so as to join the sewage and flow toward the storage tank 11 again.

このような配置とすることで、汚水中に含まれる固形物が排水流路12の底部に沈殿することを効果的に防止することができる。   By setting it as such arrangement | positioning, it can prevent effectively that the solid substance contained in sewage settles in the bottom part of the drainage flow path 12. FIG.

貯留槽11と排水流路12における配管16の出口との間には、分離槽18を設けておくことが好ましい。汚水発生源から排出される汚水中には、微細な固形物のみならず、比較的大きな塊状の固形物も含まれており、このような大きな固形物を分離槽18で効率良く分離することができる。   A separation tank 18 is preferably provided between the storage tank 11 and the outlet of the pipe 16 in the drainage channel 12. The sewage discharged from the sewage generation source includes not only fine solids but also relatively large lump solids, and such large solids can be efficiently separated in the separation tank 18. it can.

(2)実施形態の動作
上記のような構成を有する排水処理設備10において、塩化工程における汚水発生源で発生した汚水には、酸性汚水の他に不溶性の固形物も含まれており、排水流路12に排出される。
(2) Operation of the embodiment In the wastewater treatment facility 10 having the above-described configuration, the sewage generated at the sewage generation source in the chlorination step includes insoluble solids in addition to acidic sewage, It is discharged to the path 12.

排水流路12に排出された汚水は、排水流路12を通じ、分離槽18を介して貯留槽11に流入する。貯留槽11では、そこに流入した汚水に含まれている固形物は汚水中に分散されて別の排水処理設備(図示略)に送液される。   The sewage discharged to the drainage channel 12 flows into the storage tank 11 through the drainage channel 12 and the separation tank 18. In the storage tank 11, the solid matter contained in the sewage flowing into the storage tank 11 is dispersed in the sewage and sent to another wastewater treatment facility (not shown).

特に、本実施形態では、貯留槽11において固形物が分離除去された汚水の一部を、配管16を通じて排水流路12の上流側に戻して汚水発生源からの汚水に合流させるので、これにより汚水中の固形物の貯留槽11への移送を促進することができ、汚水に含まれる固形物を効率的に移送することができる。   In particular, in this embodiment, a part of the sewage from which the solid matter is separated and removed in the storage tank 11 is returned to the upstream side of the drainage flow path 12 through the pipe 16 and joined to the sewage from the sewage generation source. The transfer of the solid matter in the sewage to the storage tank 11 can be promoted, and the solid matter contained in the sewage can be efficiently transferred.

加えて、貯留槽11の内部に撹拌装置15を設けたので、固形物を効果的に分散させることができる。これにより貯留槽11の底部に沈積することなく、汚水に含まれる固形物をより効率的に別に設けた排水処理設備(図示略)に移送することができる。   In addition, since the stirrer 15 is provided inside the storage tank 11, solids can be effectively dispersed. Accordingly, the solid matter contained in the sewage can be more efficiently transferred to a wastewater treatment facility (not shown) separately provided without being deposited at the bottom of the storage tank 11.

排水処理設備10を流通している汚水には塩酸が含まれておりそこからガスあるいはミスト状の塩酸が発生することがある。   The sewage flowing through the wastewater treatment facility 10 contains hydrochloric acid, from which gas or mist-like hydrochloric acid may be generated.

しかし、貯留槽11および排水流路12の空間部を密閉構造とし、この空間部を減圧装置14によって減圧吸引しているので、上記のような塩酸ガスがこれら部位11,12の空間部内への滞留や、貯留槽11および排水流路12の外部への漏出を防止することができる。   However, since the space part of the storage tank 11 and the drainage flow path 12 is made into a sealed structure, and this space part is decompressed and sucked by the decompression device 14, the hydrochloric acid gas as described above enters the space part of these parts 11 and 12. It is possible to prevent stagnation and leakage to the outside of the storage tank 11 and the drainage channel 12.

したがって、汚水から発生する塩酸ガスによる排水流路12やその周囲に配置されている設備の腐食を効果的に防止することができる。   Therefore, it is possible to effectively prevent corrosion of the drainage flow path 12 and the equipment disposed around it due to hydrochloric acid gas generated from sewage.

以上、上記実施形態を挙げて本発明を説明したが、本発明は上記実施形態に限定されるものではなく、種々の変形が可能である。   While the present invention has been described with reference to the above embodiment, the present invention is not limited to the above embodiment, and various modifications can be made.

たとえば、上記実施形態では、本発明を金属塩化物の製造工程に適用したが、これに限定されるものではなく、種々の汚水発生源に適用することができる。この場合、腐食性ガスを含む汚水を発生する汚水発生源に用いて好適である。   For example, in the above embodiment, the present invention is applied to the metal chloride production process, but the present invention is not limited to this, and can be applied to various sewage generation sources. In this case, it is suitable for use as a sewage generation source that generates sewage containing corrosive gas.

本発明の一実施形態に係る排水処理設備の概略構成を示す図であり、排水処理設備を上から見た断面図である。It is a figure showing the schematic structure of the waste water treatment equipment concerning one embodiment of the present invention, and is a sectional view which looked at the waste water treatment equipment from the top. 従来の排水処理設備の概略構成を示す図であり、従来の排水処理設備を上から見た断面図である。It is a figure which shows schematic structure of the conventional waste water treatment facility, and is sectional drawing which looked at the conventional waste water treatment facility from the top.

符号の説明Explanation of symbols

10…排水処理設備、11…貯留槽、12…排水流路、13…送液ポンプ、14…減圧装置、15…撹拌装置、16…配管、17…循環ポンプ(送液ポンプ)、18…分離槽   DESCRIPTION OF SYMBOLS 10 ... Waste water treatment equipment, 11 ... Storage tank, 12 ... Drain flow path, 13 ... Liquid feed pump, 14 ... Pressure-reducing device, 15 ... Stirrer, 16 ... Piping, 17 ... Circulation pump (liquid feed pump), 18 ... Separation Tank

Claims (4)

汚水を排水するための排水流路と、前記排水流路の途中に設けた分離槽と、前記排水流路の末端に設けた貯留槽と、前記貯留槽の汚水の一部を前記排水流路の上流側に戻すための配管および送液ポンプとから構成された排水設備全体を密閉化し、該密閉化された排水設備の空間部を減圧吸引下に保持したことを特徴とする排水処理設備。 A drain passage for draining sewage, and separation tank provided in the middle of the drainage channel, a reservoir provided at the end of the drainage channel, the drainage channel a part of sewage of the reservoir A wastewater treatment facility characterized in that the entire drainage facility composed of a pipe for returning to the upstream side and a liquid feed pump is sealed, and the space of the sealed drainage facility is held under reduced pressure suction. 前記分離槽は、前記汚水に含まれる固形物を該汚水から分離するために供されることを特徴とする請求項1に記載の排水処理設備。 The waste water treatment facility according to claim 1 , wherein the separation tank is provided to separate solids contained in the sewage from the sewage. 前記貯留槽の内部には、該貯留槽内の汚水を撹拌するための撹拌装置を備えていることを特徴とする請求項1または2に記載の排水処理設備。 The wastewater treatment facility according to claim 1 or 2 , further comprising a stirring device for stirring the sewage in the storage tank inside the storage tank. 前記貯留槽が内部タンクと外部タンクから構成された二重構造を有して、該内部タンクと外部タンクとの空間部に汚水漏洩検知器を設けたことを特徴とする請求項1〜3のいずれかに記載の排水処理設備。
The said storage tank has a double structure comprised from the internal tank and the external tank, The sewage leak detector was provided in the space part of this internal tank and an external tank, The Claims 1-3 characterized by the above-mentioned. The wastewater treatment facility according to any one of the above.
JP2004099309A 2004-03-30 2004-03-30 Wastewater treatment facility Expired - Lifetime JP4178123B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004099309A JP4178123B2 (en) 2004-03-30 2004-03-30 Wastewater treatment facility

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004099309A JP4178123B2 (en) 2004-03-30 2004-03-30 Wastewater treatment facility

Publications (2)

Publication Number Publication Date
JP2005279515A JP2005279515A (en) 2005-10-13
JP4178123B2 true JP4178123B2 (en) 2008-11-12

Family

ID=35178468

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004099309A Expired - Lifetime JP4178123B2 (en) 2004-03-30 2004-03-30 Wastewater treatment facility

Country Status (1)

Country Link
JP (1) JP4178123B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105540688A (en) * 2015-12-23 2016-05-04 上海大学 A sewage pipeline agent slow-release device discontinuously injecting agents under a fluid state

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017159291A (en) * 2016-03-07 2017-09-14 伯東株式会社 Treatment method for crude oil-containing waste liquid and treatment equipment for crude oil-containing waste liquid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105540688A (en) * 2015-12-23 2016-05-04 上海大学 A sewage pipeline agent slow-release device discontinuously injecting agents under a fluid state
CN105540688B (en) * 2015-12-23 2018-08-03 上海大学 There is the sewage conduct medicament delayed release device that medicament is discontinuously injected under fluid state

Also Published As

Publication number Publication date
JP2005279515A (en) 2005-10-13

Similar Documents

Publication Publication Date Title
US4957633A (en) Floatation clarifying and flocculating/purification of liquid
JP4178123B2 (en) Wastewater treatment facility
JP2010088759A (en) Method for processing wastewater including dialyzate wastewater generated by dialysis treatment
CN112777779A (en) Oily wastewater treatment method
RU2453354C1 (en) Self-cleaning filter
CN108786221A (en) A kind of waste water filtering processing internal lining pipe
CN108408989A (en) Water treatment facilities in aluminum alloy pattern plate high-pressure cleaning system
US20200009479A1 (en) De-sanding a digester
CN106630316A (en) Integrated multiphase-flow treatment device for oil-containing sewage and sewage treatment method
JP4952877B2 (en) Sludge concentration method and sludge concentration apparatus
KR101729316B1 (en) Oxidation aerator
CN206751566U (en) A kind of new wastewater treatment environmental protecting device
KR101952657B1 (en) Feedwater pump having function electrolysis
KR101642662B1 (en) Feedwater pump with electrolyzer
CN108640326A (en) Method for treating desulfurized wastewater and vacuum hydroextractor filtrate water recycling device
JPH1073079A (en) Water and air cleaning method for water sealed type vacuum pump
CN220149395U (en) Underground construction wastewater treatment and calcium carbonate recovery multiplexing device
CN207292787U (en) A kind of industry ice making raw water storage facilities
CN207950787U (en) A kind of raw water filtration device
RU2186037C1 (en) Sewage purifying apparatus
KR0144236B1 (en) Chemical treatment method for septic tank
JP3145757U (en) Liquid cyclone lower concentration tube and liquid cyclone device
JP4545715B2 (en) Organic wastewater treatment equipment repair method
CN105753206A (en) Waste liquor drip washing and stabilizing integrated treatment equipment for contaminated soil remediation
CN206607039U (en) Biohazard Waste Disposal filtering ponds

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080618

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080722

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20080811

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20080825

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110829

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4178123

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110829

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110829

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120829

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120829

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120829

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130829

Year of fee payment: 5

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130829

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130829

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130829

Year of fee payment: 5

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term