JP2017202455A - Drainage system - Google Patents
Drainage system Download PDFInfo
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- JP2017202455A JP2017202455A JP2016095939A JP2016095939A JP2017202455A JP 2017202455 A JP2017202455 A JP 2017202455A JP 2016095939 A JP2016095939 A JP 2016095939A JP 2016095939 A JP2016095939 A JP 2016095939A JP 2017202455 A JP2017202455 A JP 2017202455A
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- 239000000463 material Substances 0.000 claims abstract description 25
- 230000035699 permeability Effects 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 4
- 239000010935 stainless steel Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 32
- 238000005206 flow analysis Methods 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 13
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 230000003068 static effect Effects 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 abstract description 20
- 229910000037 hydrogen sulfide Inorganic materials 0.000 abstract description 20
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 11
- -1 scale Inorganic materials 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 238000013019 agitation Methods 0.000 abstract description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 description 43
- 239000010865 sewage Substances 0.000 description 7
- 229910001141 Ductile iron Inorganic materials 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 210000002310 elbow joint Anatomy 0.000 description 4
- 238000011835 investigation Methods 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
Abstract
Description
本発明は、排水システムに関し、特には、下水道などにおいて好適に使用し得る排水システムに関するものである。 The present invention relates to a drainage system, and more particularly, to a drainage system that can be suitably used in sewers and the like.
従来、周波数が時間的に変化する交流電流をコイルに流し、発生した電磁波で被処理水を処理することにより、錆びやスケールの発生を防止する技術が知られている（例えば、特許文献１，２参照）。 Conventionally, a technique for preventing generation of rust and scale by flowing an alternating current whose frequency changes with time into a coil and treating the water to be treated with the generated electromagnetic wave is known (for example, Patent Document 1, Patent Document 1). 2).
具体的には、特許文献１では、流体流路に巻き付けたコイルに２０Ｈｚ〜１ＭＨｚの帯域で周波数が時間的に変化する方形波の交流電流を流し、コイルに流れる電流により誘起される電磁界により流体流路を流れる流体を処理することで流体流路を構成する壁面を防錆する方法が提案されている。 Specifically, in Patent Document 1, a square-wave alternating current whose frequency changes over time in a band of 20 Hz to 1 MHz is passed through a coil wound around a fluid flow path, and an electromagnetic field induced by the current flowing in the coil is used. There has been proposed a method of rust-proofing the wall surface constituting the fluid flow path by processing the fluid flowing through the fluid flow path.
また、特許文献２では、下水中に浸漬されたコイルまたは下水流路に巻き付けたコイルに対して（−）帯電型変調電磁波発生器から１０Ｈｚ〜１ＭＨｚの帯域で周波数が時間的に変化する交流電流を流して下水を電磁波処理することによりスケールの発生を防止すると共に、電磁波処理と同時に下水に硫化水素抑制剤を供給することにより硫化水素の発生を抑制する技術が提案されている。 Moreover, in patent document 2, the alternating current from which a frequency changes temporally in the band of 10 Hz-1 MHz from a (-) charging type modulation | alteration electromagnetic wave generator with respect to the coil immersed in the sewage, or the coil wound around the sewage flow path. A technique has been proposed in which generation of scale is prevented by supplying a hydrogen sulfide inhibitor to the sewage simultaneously with the electromagnetic wave treatment, while preventing generation of scale by flowing sewage into the electromagnetic wave.
そして、電磁波処理を利用した上記技術は、例えば下水道などの、排水を所望の位置まで流して排出する排水システムにおいて、排水の流路内で錆び、スケール、硫化水素等が発生するのを有効に防止し得る技術として着目されている。 The above-mentioned technology using electromagnetic wave treatment is effective in generating rust, scale, hydrogen sulfide, etc. in the drainage flow path in a drainage system that drains the drainage to a desired position, such as sewerage. It is attracting attention as a technology that can be prevented.
ここで、例えば特許文献２に開示されているように、従来、電磁波処理を利用した排水処理技術においては、排水が流れる流路が鉄などの透磁性が高い材料よりなる配管（即ち、電磁波透過量が少ない配管）である場合には、コイルの電流値を増加させることにより排水の電磁波処理に必要な電磁波量を確保していた。従って、透磁性が高い材料よりなる配管中を流れる排水の電磁波処理には、必要な電流量が増加し、コストが増大するという点において改善の余地があった。 Here, as disclosed in, for example, Patent Document 2, conventionally, in wastewater treatment technology using electromagnetic wave treatment, a flow path through which wastewater flows is a pipe made of a material having high magnetic permeability such as iron (that is, electromagnetic wave transmission). In the case of a pipe having a small amount), the amount of electromagnetic waves necessary for the electromagnetic wave treatment of the wastewater was secured by increasing the current value of the coil. Accordingly, there is room for improvement in the electromagnetic wave treatment of the wastewater flowing through the pipe made of a material having high magnetic permeability in that the amount of necessary current increases and the cost increases.
そのため、透磁性が高い材料よりなる配管中を流れる排水を効率的に電磁波処理し、錆び、スケール、硫化水素等の発生を抑制することが可能な手段を開発することが求められていた。 Therefore, it has been demanded to develop means capable of efficiently treating the waste water flowing in the pipe made of a material having high magnetic permeability with electromagnetic wave treatment and suppressing generation of rust, scale, hydrogen sulfide and the like.
本発明者らは、上記課題を解決することを目的として鋭意検討を行った。その結果、本発明者らは、鉄などの透磁性が高い導電性材料よりなる配管に巻き付けたコイルに交流電流を流して排水を電磁波処理した場合には、コイルを設置した部分を含む幅広い範囲において配管の内表面近傍を流れる排水のみが電磁波処理されることを新たに見出した。そして、本発明者らは、上記新たな知見に基づき、本発明を完成させた。 The present inventors have intensively studied for the purpose of solving the above problems. As a result, the present inventors, when flowing an alternating current through a coil wound around a pipe made of a highly permeable conductive material such as iron, and electromagnetically treating the wastewater, has a wide range including the part where the coil is installed. Newly found that only the waste water flowing near the inner surface of the pipe is subjected to electromagnetic wave treatment. And the present inventors completed this invention based on the said new knowledge.
即ち、この発明は、上記課題を有利に解決することを目的とするものであり、本発明の排水システムは、透磁性および導電性を有する材料よりなる配管と、前記配管に導線を巻き付けてなるコイルと、前記コイルに交流電流を流す交流電流発生部と、前記配管内または排水の流れ方向で見て前記コイルの設置位置よりも下流側に設けられた撹拌部とを備えることを特徴とする。このように、撹拌部を設ければ、コイルに交流電流を流した結果として配管の延在方向の幅広い範囲において電磁波処理された配管の内表面近傍を流れる排水を配管の中心側を流れる排水と混合し、電磁波処理の影響を配管の中心側まで与えることができる。従って、透磁性が高い材料よりなる配管中を流れる排水を効率的に電磁波処理し、錆び、スケール、硫化水素等の発生を抑制することができる。 That is, this invention aims at solving the said subject advantageously, The drainage system of this invention winds a conducting wire around the piping which consists of material which has magnetic permeability and electroconductivity, and the said piping. A coil, an AC current generation unit that supplies an AC current to the coil, and a stirring unit that is provided on the downstream side of the installation position of the coil when viewed in the piping or in the flow direction of drainage, are provided. . As described above, when the stirring unit is provided, the drainage flowing near the inner surface of the pipe subjected to electromagnetic wave treatment in a wide range in the extending direction of the pipe as a result of flowing an alternating current through the coil is separated from the drainage flowing in the center side of the pipe. It can mix and can give the influence of electromagnetic wave processing to the center side of piping. Accordingly, the wastewater flowing through the pipe made of a material having high magnetic permeability can be efficiently subjected to electromagnetic wave treatment, and generation of rust, scale, hydrogen sulfide and the like can be suppressed.
ここで、本発明の排水システムにおいて、前記透磁性および導電性を有する材料としては、例えば、鉄、鋳鉄またはステンレス鋼が挙げられる。 Here, in the drainage system of the present invention, examples of the material having magnetic permeability and conductivity include iron, cast iron, and stainless steel.
そして、本発明の排水システムでは、前記撹拌部は、前記コイルの設置位置よりも下流側に設けられていることが好ましい。コイルの設置位置よりも下流側に撹拌部を設ければ、配管の延在方向の幅広い範囲に亘って電磁波処理された排水を撹拌することができるので、錆び、スケール、硫化水素等の発生を更に抑制することができるからである。 And in the drainage system of this invention, it is preferable that the said stirring part is provided in the downstream rather than the installation position of the said coil. If a stirrer is provided on the downstream side of the coil installation position, wastewater that has been subjected to electromagnetic wave treatment can be stirred over a wide range in the direction in which the pipe extends, so rust, scale, hydrogen sulfide, etc. can be generated. This is because it can be further suppressed.
また、本発明の排水システムは、前記撹拌部が、前記配管と他の配管とを接続し、且つ、所定の条件下における流動解析の結果が下記の条件（１）および（２）：
（１）継手内の最高流速位置での継手断面における、継手の入口の流速よりも高速化した部分の流速の平均値が、継手の入口における流速の１．５倍以上である
（２）継手内の最高流速位置での継手断面内において、継手の入口の流速よりも高速化した部分の流速の平均値が残部の流速の平均値の５．０倍以上である
の少なくとも一方を満たす継手であることが好ましい。上記条件（１）および（２）の少なくとも一方を満たす継手を撹拌部として使用すれば、配管の内表面近傍を流れる排水と配管の中心側を流れる排水とを良好に混合し、電磁波処理の影響を配管の中心側まで効率的に与えることができるからである。
なお、本発明において、「所定の条件下における流動解析」とは、以下の条件での排水の流動解析を指す。
・モデル：１／２対称モデル
・計算法：非圧縮性定常解析
・計算格子数：２０〜７５万点
・水の物性値（密度）：９９８．２ｋｇ／ｍ3
・水の物性値（粘性係数）：０．００１００２ｋｇ／ｍ／ｓ
・汚泥粒子の物性値（密度）：１０２０ｋｇ／ｍ3
・境界条件（入口流速）：１．０ｍ／ｓ
・乱流モデル：Ｒｅｙｎｏｌｄｓ Ｓｔｒｅｓｓ Ｍｏｄｅｌ 方程式モデル
・使用コード：流体解析 ＦＬＵＥＮＴ Ｖ１６．１
また、本発明において、「継手内の最高流速位置での継手断面」とは、継手内において流速が最高になる位置を含み、継手の中心軸線に直交する断面を指す。
Further, in the drainage system of the present invention, the stirring unit connects the pipe and another pipe, and the result of the flow analysis under a predetermined condition is the following conditions (1) and (2):
(1) In the joint cross section at the highest flow velocity position in the joint, the average value of the flow velocity at the portion higher than the flow velocity at the joint inlet is 1.5 times or more the flow velocity at the joint inlet. (2) Joint A joint satisfying at least one of the average value of the flow velocity of the portion at a higher speed than the flow velocity at the inlet of the joint in the joint cross section at the highest flow velocity position in the inner portion is 5.0 times or more of the average value of the remaining flow velocity. Preferably there is. If a joint satisfying at least one of the above conditions (1) and (2) is used as a stirring part, the waste water flowing in the vicinity of the inner surface of the pipe and the waste water flowing in the center of the pipe are mixed well, and the influence of electromagnetic wave treatment This is because it can be efficiently applied to the center side of the pipe.
In the present invention, “flow analysis under predetermined conditions” refers to flow analysis of waste water under the following conditions.
・ Model: 1/2 symmetry model ・ Calculation method: Incompressible stationary analysis ・ Number of calculation grids: 200 to 750,000 points ・ Physical property value (density) of water: 998.2 kg / m 3
-Physical property value of water (viscosity coefficient): 0.001002 kg / m / s
-Physical property value (density) of sludge particles: 1020 kg / m 3
・ Boundary condition (inlet flow velocity): 1.0 m / s
-Turbulence model: Reynolds Stress Model equation model-Code used: Fluid analysis FULL V16.1
In the present invention, the “joint cross section at the highest flow velocity position in the joint” refers to a cross section including the position where the flow velocity is highest in the joint and perpendicular to the central axis of the joint.
更に、本発明の排水システムは、前記撹拌部が、前記配管と他の配管とをＬ字型に接続し、且つ、前記配管および他の配管が挿入されていない開口が塞がれた片閉じＴ字継手であることが好ましい。片閉じＴ字継手を撹拌部として使用すれば、配管の内表面近傍を流れる排水と配管の中心側を流れる排水とを良好に混合し、電磁波処理の影響を配管の中心側まで効率的に与えることができるからである。 Further, in the drainage system according to the present invention, the stirring unit connects the pipe and the other pipe in an L shape, and the opening where the pipe and the other pipe are not inserted is closed. A T-joint is preferable. If a single-closed T-shaped joint is used as a stirring part, the waste water flowing near the inner surface of the pipe and the waste water flowing near the center of the pipe are mixed well, and the influence of electromagnetic wave treatment is efficiently applied to the center of the pipe. Because it can.
また、本発明の排水システムは、前記撹拌部が、スタティックミキサー、ベンチュリ、邪魔板およびバルブからなる群から選択される少なくとも一つであることが好ましい。スタティックミキサー、ベンチュリ、邪魔板およびバルブからなる群から選択される少なくとも一つを撹拌部として使用すれば、配管の内表面近傍を流れる排水と配管の中心側を流れる排水とを良好に混合し、電磁波処理の影響を配管の中心側まで効率的に与えることができるからである。 In the drainage system of the present invention, it is preferable that the stirring unit is at least one selected from the group consisting of a static mixer, a venturi, a baffle plate, and a valve. If at least one selected from the group consisting of a static mixer, a venturi, a baffle plate and a valve is used as the stirring unit, the waste water flowing near the inner surface of the pipe and the waste water flowing near the center of the pipe are mixed well, This is because the influence of the electromagnetic wave treatment can be efficiently given to the center side of the pipe.
そして、本発明の排水システムでは、前記撹拌部は、前記コイルの設置位置よりも上流側において前記配管内に設けられており、且つ、スタティックミキサー、ベンチュリおよび邪魔板からなる群から選択される少なくとも一つであることが好ましい。透磁性および導電性を有する材料よりなる配管ではコイルに交流電流を流した結果としてコイルの設置位置よりも上流側においても配管の内表面近傍を流れる排水が電磁波処理されるところ、スタティックミキサー、ベンチュリおよび邪魔板からなる群から選択される少なくとも一つよりなる撹拌部をコイルの設置位置よりも上流側の配管内に設置すれば、電磁波処理の影響を早期に配管の中心側まで与えることができるからである。また、撹拌後の排水のうち、配管の内表面近傍を流れる排水を更に電磁波処理することができるからである。 In the drainage system of the present invention, the agitation unit is provided in the pipe on the upstream side of the installation position of the coil, and at least selected from the group consisting of a static mixer, a venturi, and a baffle plate One is preferable. In a pipe made of a material having magnetic permeability and conductivity, as a result of passing an alternating current through the coil, the waste water flowing near the inner surface of the pipe is subjected to electromagnetic wave treatment even upstream of the coil installation position. If the stirrer made of at least one selected from the group consisting of baffle plates is installed in the pipe upstream of the coil installation position, the effect of electromagnetic wave treatment can be given to the center of the pipe at an early stage. Because. Moreover, it is because the waste_water | drain which flows near the inner surface of piping among the waste_water | drain after stirring can be further electromagnetically processed.
本発明の排水システムによれば、透磁性が高い材料よりなる配管中を流れる排水を効率的に電磁波処理し、錆び、スケール、硫化水素等の発生を抑制することができる。 According to the drainage system of the present invention, wastewater flowing through a pipe made of a material having high magnetic permeability can be efficiently subjected to electromagnetic wave treatment, and generation of rust, scale, hydrogen sulfide, and the like can be suppressed.
以下、本発明の実施の形態を、図面に基づき詳細に説明する。なお、各図において、同一の符号を付したものは、同一の構成要素を示すものとする。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, in each figure, what attached | subjected the same code | symbol shall show the same component.
本発明の排水システムは、特に限定されることなく、産業排水や下水などの排水を所望の場所（例えば、排水処理施設、公共用水域など）へと排出する際に用いられる。中でも、本発明の排水システムは、下水道などにおいて好適に用いることができる。 The drainage system of the present invention is not particularly limited, and is used when discharging wastewater such as industrial wastewater and sewage to a desired place (for example, wastewater treatment facility, public water area, etc.). Among these, the drainage system of the present invention can be suitably used in sewers and the like.
ここで、本発明の排水システムは、透磁性が高い導電性材料よりなる配管に巻き付けたコイルに交流電流を流した場合には、コイルを設置した部分と、コイルを設置した部分の上流側および下流側の双方とを含む幅広い範囲において配管の内表面近傍を流れる排水のみが電磁波処理されるという新たな知見に基づいてなされたものである。
即ち、例えば図２（ｂ）に配管の中心軸線に直交する断面を示すように、一般に、非透磁性の材料からなる配管１０Ａに導線を巻き付けて形成したコイル２１に交流電流を流すと、電磁波が印加される領域５０は、配管１０Ａの外周部と配管１０Ａの内周部との双方になる。一方、図２（ａ）に配管の中心軸線に直交する断面を示すように、透磁性を有する材料からなる配管１０に導線を巻き付けて形成したコイル２１に交流電流を流すと、コイル２１からの電磁波は配管１０によって遮蔽されるため、非常に大きな電流を流さない限り、電磁波が印加される領域５０は、主として配管１０の外周部になる。しかし、本発明者らが検討したところ、配管１０が透磁性および導電性を有する材料よりなる場合には、表皮効果に起因すると推察されるが、大きな電流を流さなくても、コイルを設置した部分と、コイルを設置した部分の上流側および下流側の双方とを含む幅広い範囲において配管の内表面近傍にも電磁波が印加され、幅広い範囲において配管の内表面近傍を流れる排水のみが電磁波処理されることが明らかとなった。また、配管の内表面近傍を流れる電磁波処理された排水と、配管の中心側を流れる排水とを混合すれば、電磁波処理の影響を配管内を流れる排水全体へと及ぼし、錆び、スケール、硫化水素等の発生を抑制し得ることも明らかとなった。そこで、本発明者らは、上記知見に基づいて、本発明の排水システムを完成させた。
Here, in the drainage system according to the present invention, when an alternating current is passed through a coil wound around a pipe made of a highly permeable conductive material, the portion where the coil is installed, the upstream side of the portion where the coil is installed, and This is based on the new knowledge that only the waste water flowing near the inner surface of the pipe is subjected to electromagnetic wave treatment in a wide range including both of the downstream side.
That is, as shown in FIG. 2B, for example, as shown in a cross section perpendicular to the central axis of the pipe, generally, when an alternating current is passed through a coil 21 formed by winding a conductive wire around the pipe 10A made of a non-permeable material, Is applied to both the outer periphery of the pipe 10A and the inner periphery of the pipe 10A. On the other hand, when an alternating current is passed through a coil 21 formed by winding a conducting wire around a pipe 10 made of a magnetically permeable material, as shown in FIG. 2A, a cross section perpendicular to the central axis of the pipe, Since the electromagnetic waves are shielded by the pipe 10, the region 50 to which the electromagnetic waves are applied is mainly the outer peripheral portion of the pipe 10 unless a very large current flows. However, as a result of investigations by the present inventors, when the pipe 10 is made of a material having magnetic permeability and conductivity, it is presumed to be caused by the skin effect, but the coil was installed without flowing a large current. Electromagnetic waves are also applied to the vicinity of the inner surface of the pipe in a wide range including both the upstream side and the downstream side of the part where the coil is installed, and only the waste water flowing near the inner surface of the pipe is subjected to the electromagnetic wave treatment in a wide range. It became clear. In addition, if electromagnetic wave treated wastewater flowing near the inner surface of the pipe and wastewater flowing near the center of the pipe are mixed, the influence of electromagnetic wave treatment is exerted on the entire wastewater flowing in the pipe, resulting in rust, scale, hydrogen sulfide. It has also become clear that the occurrence of the above can be suppressed. Then, the present inventors completed the drainage system of this invention based on the said knowledge.
そして、本発明の排水システムは、排水を電磁波処理することにより錆び、スケール、硫化水素等の発生を十分に抑制するものであり、透磁性および導電性を有する材料よりなる配管と、配管に導線を巻き付けてなるコイルと、コイルに交流電流を流す交流電流発生部と、配管内または排水の流れ方向で見てコイルの設置位置よりも下流側に設けられた撹拌部とを備えることを特徴とする。上述したように、透磁性および導電性を有する材料よりなる配管に巻き付けたコイルに交流電流を流した場合には幅広い範囲において配管の内表面近傍にも電磁波が印加されるところ、このように、配管内または排水の流れ方向で見てコイルの設置位置よりも下流側に撹拌部を設ければ、電磁波処理の影響を配管内の排水全体へと及ぼし、錆び、スケール、硫化水素等の発生を抑制することができる。 The drainage system of the present invention sufficiently suppresses the generation of rust, scale, hydrogen sulfide, etc. by subjecting the wastewater to electromagnetic waves, and pipes made of a material having magnetic permeability and conductivity, and lead wires to the pipes A coil formed by winding a coil, an alternating current generating part for supplying an alternating current to the coil, and a stirring part provided on the downstream side of the installation position of the coil when viewed in the flow direction of the pipe or drainage, To do. As described above, when an alternating current is applied to a coil wound around a pipe made of a material having magnetic permeability and conductivity, electromagnetic waves are also applied to the vicinity of the inner surface of the pipe in a wide range. If a stirrer is provided downstream of the coil installation position in the piping or the direction of drainage, the effect of electromagnetic wave treatment will be exerted on the entire drainage in the piping, causing rust, scale, hydrogen sulfide, etc. Can be suppressed.
そこで、以下に、一例を用いて本発明の排水システムについてより詳細に説明するが、本発明は下記の一例に限定されるものではない。 Therefore, the drainage system of the present invention will be described below in more detail using an example, but the present invention is not limited to the following example.
図１に示す排水システム１００は、透磁性および導電性を有する材料よりなる配管１０と、配管１０に導線を巻き付けてなるコイル２１およびコイル２１に交流電流を流す交流電流発生部２２を有する電磁波発生装置２０と、排水の流れ方向で見てコイル２１の設置位置よりも下流側（図１では右側）に設けられた撹拌部３０と、撹拌部３０を介して配管１０と接続された他の配管４０とを備えている。 The drainage system 100 shown in FIG. 1 generates electromagnetic waves having a pipe 10 made of a material having magnetic permeability and conductivity, a coil 21 in which a conducting wire is wound around the pipe 10, and an alternating current generating unit 22 that sends an alternating current to the coil 21. The apparatus 20, a stirring unit 30 provided on the downstream side (right side in FIG. 1) from the installation position of the coil 21 when viewed in the flow direction of the drainage, and other piping connected to the pipe 10 via the stirring unit 30 40.
ここで、配管１０を構成する、透磁性および導電性を有する材料としては、特に限定されることなく、鉄、ダクタイル鋳鉄等の鋳鉄およびステンレス鋼などが挙げられる。 Here, the material having magnetic permeability and conductivity constituting the pipe 10 is not particularly limited, and examples thereof include cast iron such as iron and ductile cast iron, and stainless steel.
また、配管１０に巻き付けられてコイル２１を形成する導線としては、特に限定されることなく、絶縁電線やケーブルが挙げられる。 Moreover, as a conducting wire wound around the pipe 10 to form the coil 21, an insulated wire or a cable can be cited without any particular limitation.
更に、コイル２１に交流電流を流す交流電流発生部２２としては、排水の電磁波処理に使用し得る既知の交流電流発生器を用いることができ、通常は、排水中に含まれている成分の表面電位（より詳細にはゼータ電位）を配管１０の内表面の電位と同じ側に帯電させ得る電磁波を発生させる交流電流発生器が使用される。排水中に含まれている成分を配管１０の内表面と同じ側に帯電させれば、静電反発によりスケールの発生や硫化水素の発生などを抑制することができるからである。
中でも、交流電流発生部２２としては、排水中に含まれている成分の表面電位（より詳細にはゼータ電位）をマイナスにし得る（−）帯電型の電磁波を発生させる交流電流発生器を用いることが好ましい。
Furthermore, as the alternating current generator 22 for passing an alternating current through the coil 21, a known alternating current generator that can be used for electromagnetic wave treatment of waste water can be used. Usually, the surface of the component contained in the waste water is used. An alternating current generator that generates an electromagnetic wave that can charge a potential (more specifically, a zeta potential) to the same side as the potential of the inner surface of the pipe 10 is used. This is because if the components contained in the waste water are charged on the same side as the inner surface of the pipe 10, the generation of scale and the generation of hydrogen sulfide can be suppressed by electrostatic repulsion.
Among them, as the alternating current generator 22, an alternating current generator that generates (−) charged electromagnetic waves that can make the surface potential (more specifically, zeta potential) of components contained in the waste water negative can be used. Is preferred.
なお、交流電流発生部２２は、周波数が連続的または間欠的に変化する変調交流電流を発生させるものであってもよいし、単一周波数の（即ち、周波数が時間的に変化しない）交流電流を発生させるものであってもよい。上述したような交流電流発生器としては、特に限定されることなく、例えば、特開２００５−２９６７９６号公報に記載の（−）帯電型変調電磁波発生器（１０Ｈｚ〜１ＭＨｚの帯域で連続的に周波数が時間的に変化する方形波の変調交流電流を発生する装置）や、株式会社サイライズ製の「ウォーター・ウォッチャー」などが挙げられる。 The alternating current generator 22 may generate a modulated alternating current whose frequency changes continuously or intermittently, or a single frequency alternating current (that is, the frequency does not change with time). May be generated. The AC current generator as described above is not particularly limited. For example, the (−) charged modulation electromagnetic wave generator described in Japanese Patent Application Laid-Open No. 2005-296996 (frequency is continuously in a band of 10 Hz to 1 MHz). And a “water watcher” manufactured by Silize Co., Ltd., and the like.
そして、コイル２１の設置位置よりも下流側において配管１０と他の配管４０とを接続し得る撹拌部３０としては、配管１０の内表面近傍を流れる排水と配管１０の中心側を流れる排水と混合し得る任意の撹拌機構を使用することができる。具体的には、排水システム１００の撹拌部３０としては、特に限定されることなく、例えば、ラインミキサー、バタフライ弁、流量調整弁、仕切弁等のバルブ、内表面近傍を流れる排水と中心側を流れる排水とが混合される構成の継手などが挙げられる。 And as the stirring part 30 which can connect the piping 10 and the other piping 40 in the downstream rather than the installation position of the coil 21, the waste_water | drain which flows through the inner surface vicinity of the piping 10, and the waste_water | drain which flows through the center side of the piping 10 are mixed. Any stirrer mechanism that can be used can be used. Specifically, the agitation unit 30 of the drainage system 100 is not particularly limited. For example, a line mixer, a butterfly valve, a flow rate adjustment valve, a valve such as a gate valve, drainage flowing in the vicinity of the inner surface, and a central side. Examples include a joint having a configuration in which flowing drainage is mixed.
ここで、上述した継手としては、例えば、配管１０と他の配管４０とをＬ字型に接続し、且つ、配管１０および他の配管４０が挿入されていない開口が塞がれた片閉じＴ字継手や、所定の条件下における流動解析の結果が下記の条件（１）および（２）の少なくとも一方、好ましくは両方を満たす継手が挙げられる。
（１）継手内の最高流速位置での継手断面における、継手の入口の流速よりも高速化した部分の流速の平均値が、継手の入口における流速の１．５倍以上である
（２）継手内の最高流速位置での継手断面内において、継手の入口の流速よりも高速化した部分の流速の平均値が残部の流速の平均値の５．０倍以上である
なお、図３（ｂ）に示す流動解析の結果からも明らかなように、通常、９０°エルボ継手は上記条件（１）および（２）を満たさない。
Here, as the joint described above, for example, the pipe 10 and the other pipe 40 are connected in an L shape, and the opening where the pipe 10 and the other pipe 40 are not inserted is closed T Examples of character joints and joints in which the flow analysis result under a predetermined condition satisfies at least one of the following conditions (1) and (2), preferably both.
(1) In the joint cross section at the highest flow velocity position in the joint, the average value of the flow velocity at the portion higher than the flow velocity at the joint inlet is 1.5 times or more the flow velocity at the joint inlet. (2) Joint In the joint cross section at the highest flow velocity position, the average value of the flow velocity at the portion higher than the flow velocity at the inlet of the joint is 5.0 times or more than the average value of the remaining flow velocity. As is clear from the results of the flow analysis shown in (1), the 90 ° elbow joint does not normally satisfy the above conditions (1) and (2).
上述した中でも、配管１０の内表面近傍を流れていた排水と配管１０の中心側を流れていた排水とを簡素な構成で混合する観点からは、撹拌部３０としては、上述した所定の構成の継手を用いることが好ましく、片閉じＴ字継手を用いることがより好ましい。 Among the above-mentioned, from the viewpoint of mixing the drainage flowing near the inner surface of the pipe 10 and the drainage flowing in the center side of the pipe 10 with a simple configuration, the stirring unit 30 has the predetermined configuration described above. It is preferable to use a joint, and it is more preferable to use a single-closed T-shaped joint.
また、他の配管４０としては、任意の材料よりなる配管を用いることができる。なお、他の配管４０は、配管１０と平行な方向に接続されている必要はなく、撹拌部３０を介して任意の方向に接続することができる。 Further, as the other pipe 40, a pipe made of an arbitrary material can be used. The other piping 40 does not need to be connected in a direction parallel to the piping 10, and can be connected in any direction via the stirring unit 30.
そして、上述した排水システム１００では、透磁性および導電性を有する材料よりなる配管１０を用いているので、コイル２１に交流電流を流した際に、配管１０の幅広い領域（具体的には、コイル２１を設置した部分、コイル２１よりも上流側の部分１１およびコイル２１よりも下流側の部分１２）において、配管１０の内周面近傍を流れる排水に電磁波処理を施すことができる。また、上述した排水システム１００では、撹拌部３０を設けているので、電磁波処理された、配管１０の内表面近傍を流れる排水と、電磁波処理されていない中心側を流れる排水とを混合して、排水全体に電磁波処理の効果を効率的に及ぼすことができる。特に、排水システム１００では、撹拌部３０をコイル２１よりも下流側に設けているので、コイル２１よりも上流側の部分１１を含む幅広い範囲に亘って電磁波処理が施された、配管１０の内表面近傍を流れる排水を混合して、排水全体に電磁波処理の効果を十分に与えることができる。 Since the drainage system 100 described above uses the pipe 10 made of a material having magnetic permeability and conductivity, when an alternating current is passed through the coil 21, a wide area of the pipe 10 (specifically, the coil 10 In the portion where 21 is installed, the portion 11 upstream of the coil 21 and the portion 12 downstream of the coil 21, the wastewater flowing in the vicinity of the inner peripheral surface of the pipe 10 can be subjected to electromagnetic wave treatment. Moreover, in the drainage system 100 described above, since the stirring unit 30 is provided, the wastewater flowing in the vicinity of the inner surface of the pipe 10 subjected to electromagnetic wave treatment and the wastewater flowing in the center side not subjected to electromagnetic wave treatment are mixed, The effect of electromagnetic wave treatment can be efficiently exerted on the entire waste water. In particular, in the drainage system 100, since the stirring unit 30 is provided on the downstream side of the coil 21, the inside of the pipe 10 subjected to the electromagnetic wave treatment over a wide range including the portion 11 on the upstream side of the coil 21. The waste water flowing in the vicinity of the surface can be mixed, and the effect of the electromagnetic wave treatment can be sufficiently given to the whole waste water.
以上、一例を用いて本発明の排水システムについて説明したが、本発明の排水システムは、上記一例に限定されることはなく、本発明の排水システムには、適宜変更を加えることができる。
具体的には、例えば、上記一例の排水システム１００では、配管１０と他の配管４０とを接続し得る撹拌部３０を使用したが、撹拌部３０は配管１０内に設けられていてもよい。そして、配管内に設ける撹拌部としては、特に限定されることなく、例えば、スタティックミキサー、ベンチュリ、邪魔板およびこれらの組み合わせ等が挙げられる。また、上記一例の排水システム１００では、撹拌部３０を一箇所のみ設けたが、撹拌部は複数個所に設けられていてもよい。更に、上記一例の排水システム１００では、撹拌部３０をコイル２１よりも下流側に設けたが、撹拌部３０はコイル２１よりも上流側の配管１０内に設けられていてもよい。撹拌部３０をコイル２１よりも上流側の配管１０内に設けた場合には、電磁波処理の影響を早期に配管１０の中心側まで与えることができると共に、撹拌後の排水のうち、配管１０の内表面近傍を流れる排水を更に電磁波処理することができる。
As mentioned above, although the drainage system of this invention was demonstrated using an example, the drainage system of this invention is not limited to the said example, A change can be suitably added to the drainage system of this invention.
Specifically, for example, in the drainage system 100 of the above example, the stirring unit 30 that can connect the pipe 10 and another pipe 40 is used, but the stirring unit 30 may be provided in the pipe 10. And as a stirring part provided in piping, it is not specifically limited, For example, a static mixer, a venturi, a baffle plate, these combinations, etc. are mentioned. In the drainage system 100 of the above example, only one stirring unit 30 is provided, but the stirring unit may be provided at a plurality of locations. Further, in the drainage system 100 of the above example, the stirring unit 30 is provided on the downstream side of the coil 21, but the stirring unit 30 may be provided in the pipe 10 on the upstream side of the coil 21. When the stirring unit 30 is provided in the pipe 10 on the upstream side of the coil 21, the influence of electromagnetic wave treatment can be given to the center side of the pipe 10 at an early stage, and among the drained water after stirring, the pipe 10 The waste water flowing in the vicinity of the inner surface can be further subjected to electromagnetic wave treatment.
以下、本発明について実施例を用いて更に詳細に説明するが、本発明はこれら実施例に限定されるものではない。 EXAMPLES Hereinafter, although this invention is demonstrated further in detail using an Example, this invention is not limited to these Examples.
（実施例１）
ダクタイル鋳鉄製の配管Ａと、ダクタイル鋳鉄製の配管Ｂとを片閉じＴ字継手でＬ字型に接続して排水流路を形成した。また、配管Ａの一部にケーブルを巻き付けてコイルを形成し、当該コイルと交流電流発生器（株式会社サイライズ製、ＥＷＤＯ−Ｏｘ）とを接続した。
そして、交流電流発生器から１０Ｈｚ〜１ＭＨｚの帯域で連続的に周波数が時間的に変化する方形波の変調交流電流を流しつつ、配管Ａ側から配管Ｂ側に向かって排水流路内に排水（下水）を流速１．２ｍ／秒で流通させた。そして、配管Ｂの末端において硫化水素の濃度を硫化水素測定器（リケン計器社製、ＧＸ−２０００）で調べると共に、片閉じＴ字継手部分の流動解析（計算格子数：３９万点）を行った。硫化水素の濃度の調査結果を表１に示し、流動解析の結果を図３（ａ）および表１に示す。
Example 1
A duct A made of ductile iron and a duct B made of ductile cast iron were connected in an L shape with a single-closed T-shaped joint to form a drainage flow path. Further, a cable was wound around a part of the pipe A to form a coil, and the coil and an alternating current generator (produced by Silize Co., Ltd., EWDO-Ox) were connected.
Then, draining into the drainage channel from the pipe A side to the pipe B side while flowing a square-wave modulated alternating current whose frequency continuously changes in the time band from 10 Hz to 1 MHz from the AC current generator ( Sewage) was circulated at a flow rate of 1.2 m / sec. Then, the concentration of hydrogen sulfide at the end of the pipe B is examined with a hydrogen sulfide measuring instrument (manufactured by Riken Keiki Co., Ltd., GX-2000), and the flow analysis (number of calculation grids: 390,000 points) of the one-sided T-shaped joint portion It was. The investigation results of the concentration of hydrogen sulfide are shown in Table 1, and the results of flow analysis are shown in FIG.
（比較例１）
ダクタイル鋳鉄製の配管Ａと、ダクタイル鋳鉄製の配管Ｂとを９０°エルボ継手でＬ字型に接続して排水流路を形成した。また、配管Ａの一部にケーブルを巻き付けてコイルを形成し、当該コイルと交流電流発生器（株式会社サイライズ製、ＥＷＤＯ−Ｏｘ）とを接続した。
そして、交流電流発生器から１０Ｈｚ〜１ＭＨｚの帯域で連続的に周波数が時間的に変化する方形波の変調交流電流を流しつつ、配管Ａ側から配管Ｂ側に向かって排水流路内に排水（下水）を流速１．２ｍ／秒で流通させた。そして、配管Ｂの末端において硫化水素の濃度を硫化水素測定器（リケン計器社製、ＧＸ−２０００）で調べると共に、９０°エルボ継手部分の流動解析（計算格子数：７０万点）を行った。硫化水素の濃度の調査結果を表１に示し、流動解析の結果を図３（ｂ）および表１に示す。
(Comparative Example 1)
A duct A made of ductile iron and a duct B made of ductile cast iron were connected in an L shape with a 90 ° elbow joint to form a drainage flow path. Further, a cable was wound around a part of the pipe A to form a coil, and the coil and an alternating current generator (produced by Silize Co., Ltd., EWDO-Ox) were connected.
Then, draining into the drainage channel from the pipe A side to the pipe B side while flowing a square-wave modulated alternating current whose frequency continuously changes in the time band from 10 Hz to 1 MHz from the AC current generator ( Sewage) was circulated at a flow rate of 1.2 m / sec. Then, the hydrogen sulfide concentration at the end of the pipe B was examined with a hydrogen sulfide measuring instrument (manufactured by Riken Keiki Co., Ltd., GX-2000), and the flow analysis of the 90 ° elbow joint part (calculation grid number: 700,000 points) was performed. . The investigation results of the concentration of hydrogen sulfide are shown in Table 1, and the results of flow analysis are shown in FIG.
表１および図３より、配管内を流れる排水が撹拌された実施例１では、排水を良好に電磁波処理し、硫化水素の発生を抑制し得ることが分かる。一方、図３（ｂ）からも明らかなように配管内を流れる排水が撹拌されない比較例１では、硫化水素の発生を十分には抑制できないことが分かる。 From Table 1 and FIG. 3, it can be seen that in Example 1 in which the waste water flowing in the pipe was stirred, the waste water was satisfactorily treated with electromagnetic waves, and generation of hydrogen sulfide could be suppressed. On the other hand, as is clear from FIG. 3B, it can be seen that in Comparative Example 1 in which the waste water flowing in the pipe is not stirred, the generation of hydrogen sulfide cannot be sufficiently suppressed.
本発明の排水システムによれば、透磁性が高い材料よりなる配管中を流れる排水を効率的に電磁波処理し、錆び、スケール、硫化水素等の発生を抑制することができる。 According to the drainage system of the present invention, wastewater flowing through a pipe made of a material having high magnetic permeability can be efficiently subjected to electromagnetic wave treatment, and generation of rust, scale, hydrogen sulfide, and the like can be suppressed.
１０，１０Ａ 配管
２０ 電磁波発生装置
２１ コイル
２２ 交流電流発生部
３０ 撹拌部
４０ 他の配管
５０ 電磁波が印加される領域
１００ 排水システム
10, 10A Pipe 20 Electromagnetic wave generator 21 Coil 22 AC current generator 30 Stirrer 40 Other pipe 50 Area 100 where electromagnetic waves are applied Drainage system
Claims (7)
前記配管に導線を巻き付けてなるコイルと、
前記コイルに交流電流を流す交流電流発生部と、
前記配管内または排水の流れ方向で見て前記コイルの設置位置よりも下流側に設けられた撹拌部と、
を備える、排水システム。 A pipe made of a material having magnetic permeability and conductivity;
A coil formed by winding a conductive wire around the pipe;
An alternating current generator for passing an alternating current through the coil;
A stirring portion provided on the downstream side of the installation position of the coil as seen in the pipe or in the flow direction of drainage;
Equipped with a drainage system.
（１）継手内の最高流速位置での継手断面における、継手の入口の流速よりも高速化した部分の流速の平均値が、継手の入口における流速の１．５倍以上である
（２）継手内の最高流速位置での継手断面内において、継手の入口の流速よりも高速化した部分の流速の平均値が残部の流速の平均値の５．０倍以上である The said stirring part is a joint which connects the said piping and other piping, and the result of the flow analysis under predetermined conditions satisfies at least one of the following conditions (1) and (2). Drainage system as described in.
(1) In the joint cross section at the highest flow velocity position in the joint, the average value of the flow velocity at the portion higher than the flow velocity at the joint inlet is 1.5 times or more the flow velocity at the joint inlet. (2) Joint In the joint cross section at the highest flow velocity position in the inside, the average value of the flow velocity at a portion higher than the flow velocity at the inlet of the joint is 5.0 times or more than the average value of the remaining flow velocity.
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