JP4608626B2

JP4608626B2 - Methylene chloride recovery system

Info

Publication number: JP4608626B2
Application number: JP2005273961A
Authority: JP
Inventors: 満小澤
Original assignee: 小澤滿
Priority date: 2005-09-21
Filing date: 2005-09-21
Publication date: 2011-01-12
Anticipated expiration: 2025-09-21
Also published as: JP2007083149A

Description

本発明は空気中に含まれた塩化エチレンを回収装置に関し、特に、例えば発泡スチロールのリサイクルに用いる塩化メチレン液回収装置に関する。 The present invention relates to an apparatus for recovering ethylene chloride contained in air, and more particularly to an apparatus for recovering methylene chloride used for recycling, for example, polystyrene foam.

周知のように、緩衝包装材料などとして用いられる発泡スチロールのリサイクルに際しては、塩化メチレン液を発泡スチロール・ブロックにスプレーして溶解させ、リサイクルを行う。 As is well known, when recycling polystyrene foam used as a buffer packaging material or the like, methylene chloride solution is sprayed and dissolved in a polystyrene foam block for recycling.

このようなリサイクル設備においては、一部が気化した塩化メチレンを含んだ混合気から塩化メチレンを回収する必要があるので、処理後の混合気を大型空調装置に送り込み、気化塩化メチレンを露結回収している。
特開平１０−１６８２２０特開２０００−２５６５０２ In such a recycling facility, it is necessary to recover methylene chloride from a mixture containing partially vaporized methylene chloride, so the treated mixture is sent to a large air conditioner and vaporized methylene chloride is recovered by condensation. is doing.
JP-A-10-168220 JP 2000-256502 A

しかしながら、使用塩化メチレンの回収のために大型空調装置を用いるのでは、スペースの確保のため、店頭や小事業所でリサイクルを行うことができなかった。
本発明の目的は、以上に述べたような従来の発泡スチロール・ブロックのリサイクル上の問題に鑑み、比較的簡単な構造で、安価に製作できる小型の塩化メチレン液回収装置を得るにある。 However, using a large air conditioner to recover the methylene chloride used could not be performed at stores or small offices to secure space.
An object of the present invention is to obtain a small methylene chloride liquid recovery device that can be manufactured at a low cost with a relatively simple structure in view of the above-mentioned problems in recycling of conventional polystyrene blocks.

この目的を達成するため、本発明は、折曲部を下部とした略“Ｕ”字状異径同心三重菅の外套大径菅の上部一端に塩化メチレンを含んだ混合気を取り入れる混合気取入口を設け、同混合気取入口とは反対側の上部他端に浄化空気を排出できる浄化空気取出口を設けると共に、前記折曲部には液化塩化メチレンを外部回収できる塩化メチレン取出口を形成し、前記外套大径菅内部の伝熱中径菅の前記折曲部には外部から冷媒液を伝熱中径菅内部に圧送できる冷媒取入口を穿け、同伝熱中径菅中を貫流した冷媒液を外部に再循環させる冷媒取出口を伝熱中径菅の上部に設けた塩化メチレン液回収装置を提案するものである。 In order to achieve this object, the present invention provides a mixed gas inlet in which an air-fuel mixture containing methylene chloride is introduced into the upper end of a large-sized outer shell of a substantially “U” -shaped concentric triple rod with a bent portion at the bottom. An inlet is provided, and a purified air outlet that can discharge purified air is provided at the other upper end opposite to the mixture inlet, and a methylene chloride outlet that allows external recovery of liquefied methylene chloride is formed at the bent portion. The bent portion of the heat transfer medium diameter rod inside the outer large diameter rod is provided with a refrigerant inlet through which the refrigerant liquid can be pumped from the outside into the heat transfer medium diameter rod, and the refrigerant liquid flowing through the heat transfer medium diameter rod. This proposes a methylene chloride liquid recovery device in which a refrigerant outlet for recirculating the gas to the outside is provided above the heat transfer medium diameter rod.

本発明によれば、流路断面積の割合に接触面積の大きな伝熱中径菅を介して、導入混合気が冷媒液で急速に冷却され、“Ｕ”字底部に塩化メチレン液として流下捕集されるから、回収された塩化メチレン液を再利用できる。したがって、比較的簡単な構造で、安価に製作できる小型の塩化メチレン液回収装置を得ることができる。 According to the present invention, the introduced air-fuel mixture is rapidly cooled with the refrigerant liquid via the heat transfer medium diameter rod having a large contact area in the ratio of the cross-sectional area of the flow path, and is collected as a methylene chloride liquid at the bottom of the “U” shape. Therefore, the recovered methylene chloride solution can be reused. Therefore, it is possible to obtain a small methylene chloride liquid recovery device that can be manufactured at a low cost with a relatively simple structure.

後述する本発明の好ましい実施例の説明においては、
１）前記“Ｕ”字状異径同心三重菅は、真直ぐな異径の外套大径菅、伝熱中径菅、空洞内菅を同心関係においた一対の三重菅ユニットと、各三重菅ユニットの外套大径菅の下部空間を連絡する中継菅で構成され、前記混合気取入口、浄化空気取出口、塩化メチレン取出口、冷媒取入口、冷媒取出口は、対応する外套大径菅、伝熱中径菅、空洞内菅の端部寄りの周壁に設けられた構造、
２）前記冷媒液は略４℃程度の温度に保たれたエチレングリコール液であるもの
が説明される。 In the description of the preferred embodiments of the invention described below,
1) The “U” -shaped different diameter concentric triple rod is composed of a pair of triple rod units in which a straight outer diameter large diameter rod, a heat transfer medium diameter rod, and a hollow inner rod are concentrically connected, and It consists of a relay rod that communicates with the lower space of the outer large-diameter rod, and the mixed gas intake port, purified air outlet port, methylene chloride outlet port, refrigerant inlet port, and refrigerant outlet port A structure provided on the peripheral wall near the end of the diameter ridge, inner cavities,
2) The refrigerant liquid is an ethylene glycol liquid maintained at a temperature of about 4 ° C.

以下、図面について本発明の実施例の詳細を説明する。 Hereinafter, the details of the embodiments of the present invention will be described with reference to the drawings.

図１は本発明の特徴をよく現しており、折曲部Ａを下部とした略“Ｕ”字状異径同心三重菅Ｂの外套大径菅Ｃ１，Ｃ２の上部一端に塩化メチレンを含んだ混合気を取り入れる混合気取入口Ｄを設け、同混合気取入口Ｄとは反対側の上部他端に浄化空気を排出できる浄化空気取出口Ｅを設けると共に、前記折曲部Ａには液化塩化メチレンを外部回収できる塩化メチレン取出口Ｆ１，Ｆ２を形成し、前記外套大径菅Ｃ１，Ｃ２内部の伝熱中径菅Ｇ１，Ｇ２の湾曲折曲部Ａには外部から冷媒液を伝熱中径菅Ｇ１，Ｇ２内部に圧送できる冷媒取入口Ｈ１，Ｈ２を穿け、同伝熱中径菅Ｇ１，Ｇ２中を貫流した冷媒液を外部に再循環させる冷媒取出口Ｉ１，Ｉ２を伝熱中径菅Ｇの上部に設けた構造の塩化メチレン液回収装置である。 FIG. 1 shows the characteristics of the present invention well, and methylene chloride is contained at one upper end of the outer large diameter collars C1 and C2 of a substantially “U” -shaped different-diameter concentric triple collar B with the bent part A as the lower part. A mixed gas inlet D for taking in the mixed gas is provided, and a purified air outlet E through which purified air can be discharged is provided at the other upper end opposite to the mixed gas inlet D, and the bent portion A is liquefied chloride. Methylene chloride outlets F1 and F2 capable of recovering methylene to the outside are formed, and the refrigerant liquid is supplied from the outside to the curved bent portions A of the heat transfer medium diameters G1 and G2 inside the outer jacket diameters C1 and C2. Refrigerant inlets H1 and H2 that can be pumped into G1 and G2 are opened, and refrigerant outlets I1 and I2 that recirculate the refrigerant liquid that has flown through the heat transfer medium diameters G1 and G2 to the outside are provided above the heat transfer medium diameters G. This is a methylene chloride liquid recovery device having the structure provided in FIG.

図示実施例の場合、“Ｕ”字状異径同心三重菅Ｂは略垂直方向に伸びた一対の三重菅ユニットＢ１，Ｂ２で構成され、これらの三重菅ユニットＢ１，Ｂ２は同心関係においた真直ぐな異径の外套大径菅Ｃ１，Ｃ２、伝熱中径菅Ｇ１，Ｇ２、空洞内菅Ｊ１，Ｊ２を備えている。
図２及び図３から理解されるように、外套大径菅Ｃ１，Ｃ２及び伝熱中径菅Ｇ１，Ｇ２の上下端面はリング状端壁で閉塞してあり、両三重菅ユニットＢ１，Ｂ２における外套大径菅Ｃ１，Ｃ２の下部空間の間を連絡する中継菅Ｋで、塩化メチレンを含んだ混合気ための“Ｕ”字状通路が構成される。 In the illustrated embodiment, the “U” -shaped different-diameter concentric triple rod B is composed of a pair of triple rod units B1 and B2 extending in a substantially vertical direction, and these triple rod units B1 and B2 are straight in a concentric relationship. These are provided with different outer diameter large collars C1, C2, heat transfer medium diameters G1, G2, and cavity inner collars J1, J2.
As can be understood from FIGS. 2 and 3, the upper and lower end surfaces of the outer cover large-diameter rods C1 and C2 and the heat transfer intermediate-diameter rods G1 and G2 are closed by ring-shaped end walls. A relay rod K communicating between the lower spaces of the large-diameter rods C1 and C2 constitutes a “U” -shaped passage for an air-fuel mixture containing methylene chloride.

また、右側三重菅ユニットＢ１，Ｂ２の外套大径菅Ｃ１，Ｃ２の周壁上部には、外部から塩化メチレンを含んだ混合気を取込む前記混合気取入口Ｄが、左側三重菅ユニットＢ１，Ｂ２の外套大径菅Ｃ１，Ｃ２の周壁上部には、塩化メチレンを液化除去された後の浄化空気取出口Ｅがそれぞれ設けられる。
そして、両三重菅ユニットＢ１，Ｂ２の外套大径菅Ｃ１，Ｃ２の周壁下部には、露結により液化した塩化メチレン液を再循環させる塩化メチレン取出口がそれぞれ形成される。 In addition, the mixture inlet D for taking in an air-fuel mixture containing methylene chloride from the outside is provided on the upper peripheral wall of the outer large-diameter bowls C1 and C2 of the right triple bowl units B1 and B2. Purified air outlets E from which methylene chloride has been liquefied and removed are respectively provided on the upper peripheral walls of the outer canopy ridges C1 and C2.
A methylene chloride outlet for recirculating the methylene chloride solution liquefied by condensation is formed in the lower part of the peripheral wall of the outer large ridges C1 and C2 of the triple fold units B1 and B2, respectively.

さらに、両三重菅ユニットＢ１，Ｂ２の伝熱中径菅Ｇ１，Ｇ２の周壁下部には、低温エチレングリコール液源などの冷媒源に結合される冷媒取入口Ｈ１，Ｈ２が形成され、三重菅ユニットＢ１，Ｂ２の伝熱中径菅Ｇ１，Ｇ２の周壁上部に冷媒取出口Ｉ１，Ｉ２が形成される。
したがって、伝熱中径菅Ｇ１，Ｇ２の下部の冷媒取入口Ｈ１，Ｈ２から伝熱中径菅Ｇ１，Ｇ２中に取込まれた低温冷媒は、伝熱中径菅Ｇ１，Ｇ２中を下部から上部へ向かって流れるから、４０℃が液化温度である外套大径菅Ｃ１，Ｃ２中の塩化メチレンを効果的に液化できる。 Furthermore, refrigerant inlets H1 and H2 coupled to a refrigerant source such as a low-temperature ethylene glycol liquid source are formed in the lower part of the peripheral wall of the heat transfer medium diameters G1 and G2 of the triple triple units B1 and B2, and triple triple unit B1 , B2 are formed with refrigerant outlets I1 and I2 at upper portions of the peripheral walls of the heat transfer medium diameters G1 and G2.
Accordingly, the low-temperature refrigerant taken into the heat transfer medium diameters G1, G2 from the refrigerant inlets H1, H2 at the lower part of the heat transfer medium diameters G1, G2 moves from the lower part to the upper part in the heat transfer medium diameters G1, G2. Therefore, methylene chloride in the outer large-diameter bowls C1 and C2 whose liquefaction temperature is 40 ° C. can be effectively liquefied.

なお、両三重菅ユニットＢ１，Ｂ２の空洞内菅Ｊ１，Ｊ２の内部空間は、図示実施例の場合、外界に貫通した状態のままに放置してあるけれども、同内部空間中には、例えば塩化メチレンを含んだ余剰混合気の一部を導入してもよい。 In the case of the illustrated embodiment, the internal spaces of the hollow inner casings J1 and J2 of both triple fence units B1 and B2 are left in a state of penetrating to the outside world. A part of the surplus gas mixture containing methylene may be introduced.

図示実施例による塩化メチレン液回収装置は、以上に述べたような構造であるから、径の異なる真直ぐな複数本の金属管により三重菅ユニットＢ１，Ｂ２を作ることができるため、製造原価が割安で、小型化できる。 Since the methylene chloride solution recovery apparatus according to the illustrated embodiment has the structure as described above, the triple cocoon units B1 and B2 can be made of a plurality of straight metal pipes having different diameters. And it can be downsized.

混合気取入口Ｄから取込まれた混合気は外套大径菅Ｃ１，Ｃ２中を下方に向かって流下し、同外套大径菅Ｃ１，Ｃ２の下部に位置する中継菅Ｋを通り、他方の外套大径菅Ｃ１，Ｃ２中を上昇して浄化空気取出口Ｅから外部へ流出する。この間、伝熱中径菅Ｇ１，Ｇ２の内部を流れる低温エチレングリコール液で低温度状態に保たれる伝熱中径菅Ｇ１，Ｇ２により取入混合気が冷却されるので、混合気が４０℃以下に冷却され、混合気中の塩化メチレンが液化し、混合気中の空気から分離して外套大径菅Ｃ１，Ｃ２の底に溜まり、塩化メチレン取出口から回収されることになる。
この混合気の冷却の際、両伝熱中径菅Ｇ１，Ｇ２の下部から供給される低温エチレングリコール液により伝熱中径菅Ｇ１，Ｇ２の下部ほど低温状態になるから、混合気中の塩化メチレンは確実に液化回収される。 The air-fuel mixture taken in from the air-fuel mixture inlet D flows downward in the outer canopy bottles C1 and C2, passes through the relay rod K located at the lower part of the outer canopy bottles C1 and C2, and the other Ascends the outer large-diameter bowls C1 and C2 and flows out from the purified air outlet E to the outside. During this time, the intake gas mixture is cooled by the heat transfer medium diameter １， G1, G2 maintained at a low temperature by the low-temperature ethylene glycol liquid flowing inside the heat transfer medium diameter 菅 G1, G2, so that the mixture is kept at 40 ° C or lower. After cooling, the methylene chloride in the gas mixture liquefies, separates from the air in the gas mixture, accumulates at the bottom of the outer jacket large diameter cups C1 and C2, and is recovered from the methylene chloride outlet.
At the time of cooling the air-fuel mixture, the lower temperature of the heat transfer medium diameters １， G1 and G2 is lowered by the low temperature ethylene glycol liquid supplied from the lower portions of both heat transfer medium diameters １， G1 and G2. It is reliably liquefied and recovered.

なお、前記実施例においては、凝固温度が低い特性の点から、低温エチレングリコールを用いた例を説明したけれども、冷媒液としては、例えば冷却水のような他の冷媒液であってもよいのは明らかである。 In the above embodiment, an example using low-temperature ethylene glycol has been described from the viewpoint of a low coagulation temperature. However, the refrigerant liquid may be other refrigerant liquid such as cooling water, for example. Is clear.

は本発明による塩化メチレン液回収装置の全体正面図である。1 is an overall front view of a methylene chloride solution recovery device according to the present invention. は同塩化メチレン液回収装置の平面図である。FIG. 3 is a plan view of the methylene chloride solution recovery device. は図１の３−３線に沿う拡大断面図である。FIG. 3 is an enlarged cross-sectional view taken along line 3-3 in FIG. は同塩化メチレン液回収装置の下部拡大断面図である。FIG. 3 is a lower enlarged sectional view of the methylene chloride liquid recovery device.

符号の説明Explanation of symbols

Ａ折曲部
Ｂ１，Ｂ２三重菅ユニット
Ｃ１，Ｃ２外套大径菅
Ｄ混合気取入口
Ｅ浄化空気取出口
Ｆ１，Ｆ２塩化メチレン液取出口
Ｇ１，Ｇ２伝熱中径菅
Ｈ１，Ｈ２冷媒取入口
Ｉ１，Ｉ２冷媒取出口
Ｊ１，Ｊ２空洞内菅
A Folding part B1, B2 Triple rod unit C1, C2 Mantle large-diameter rod D Mixture inlet E Purified air outlet F1, F2 Methylene chloride liquid outlet G1, G2 Heat transfer medium diameter rod H1, H2 Refrigerant inlet I1, I2 Refrigerant outlet J1, J2

Claims

折曲部を下部とした略“Ｕ”字状異径同心三重菅の外套大径菅の上部一端に塩化メチレンを含んだ混合気を取り入れる混合気取入口を設け、同混合気取入口とは反対側の上部他端に浄化空気を排出できる浄化空気取出口を設けると共に、前記折曲部には液化塩化メチレンを外部回収できる塩化メチレン取出口を形成し、前記外套大径菅内部の伝熱中径菅の前記折曲部には外部から冷媒液を伝熱中径菅内部に圧送できる冷媒取入口を穿け、同伝熱中径菅中を貫流した冷媒液を外部に再循環させる冷媒取出口を伝熱中径菅の上部に設けたことを特徴とする塩化メチレン液回収装置。 A mixed gas intake for introducing a mixture containing methylene chloride is provided at the upper end of the outer diameter large cocoon of a substantially “U” -shaped concentric triple fold with the bent portion at the bottom. What is the mixed gas intake? Provided with a purified air outlet capable of discharging purified air at the other upper upper end, and forming a methylene chloride outlet capable of collecting liquefied methylene chloride outside at the bent portion, The bent portion of the diameter rod is pierced with a refrigerant inlet through which refrigerant liquid can be pumped from the outside to the inside of the heat transfer medium diameter rod, and transmitted through the refrigerant outlet for recirculating the refrigerant liquid flowing through the heat transfer medium diameter rod to the outside. A methylene chloride liquid recovery device, which is provided on the upper part of the hot medium diameter tub.

前記“Ｕ”字状異径同心三重菅は、真直ぐな異径の外套大径菅、伝熱中径菅、空洞内菅を同心関係においた一対の三重菅ユニットと、各三重菅ユニットの外套大径菅の下部空間を連絡する中継菅で構成され、前記混合気取入口、浄化空気取出口、塩化メチレン取出口、冷媒取入口、冷媒取出口は、対応する外套大径菅、伝熱中径菅、空洞内菅の端部寄りの周壁に設けられたことを特徴とする請求項１記載の塩化メチレン液回収装置。 The “U” -shaped different diameter concentric triple rod is composed of a pair of triple rod units having a concentric relationship between a straight outer rod having a different diameter, a heat transfer medium rod, and a hollow inner rod, and a jacket size of each triple rod unit. It is composed of a relay rod that communicates with the lower space of the diameter rod, and the mixed gas inlet, the purified air outlet, the methylene chloride outlet, the refrigerant inlet, and the refrigerant outlet are the corresponding outer large diameter rod, heat transfer medium diameter rod 2. The methylene chloride solution recovery device according to claim 1, wherein the methylene chloride solution recovery device is provided on a peripheral wall near the end of the hollow inner casing.

前記冷媒液は略４℃程度の温度に保たれたエチレングリコール液であることを特徴とする請求項１及び請求項２のいずれかひとつに記載の塩化メチレン液回収装置。
The methylene chloride solution recovery device according to any one of claims 1 and 2, wherein the refrigerant solution is an ethylene glycol solution maintained at a temperature of about 4 ° C.