JPS61174923A - Solvent recovering apparatus - Google Patents

Abstract

PURPOSE:To simplify a controlling system of the titled apparatus by providing plural adsorption vessels provided with a gas outlet valve and a steam inlet valve, plural condensers connected thereto, a gas sucking means and an apparatus separating a condensate into a solvent and water and recovering the solvent. CONSTITUTION:A solvent contained in raw gas 1 is adsorbed with an activated carbon layer 15 of an adsorption vessel 2-1 in an adsorption process and the purified gas is discharged through an exhaust line 7. On the other hand, steam is introduced into an adsorption vessel 2-2 in a desorption process via a steam inlet valve 10-2 through a steam line 9 to desorb the solvent and it is introduced into a condensor 102 via a line 105 to make it a condensate, flowed out to a discharge line 12, cooled with an after-cooler 106 and the recovery of the solvent and the discharge of water are performed in a separator 14. The desorption commands are performed by a timer or a gas sensor or the like and the adsorption and the desorption are alternately performed.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は溶剤、特に有機溶剤の回収装置に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to an apparatus for recovering solvents, particularly organic solvents.

（従来の技術） 一般に低濃度の溶剤含有ガス（以下原ガスという）から
、溶剤等を効率よく回収する方法として、分子間引力を
捕集手段とする吸着法が多用され、吸着剤としては活性
炭が用いられている。活性炭の吸着法は、排ガスからは
ぼ常温で炭化水素、アルコール、ケトン、エステル等の
溶剤を活性炭に吸着する工程と、蒸気、加熱ガスなどを
用いて行なう脱着工程とからなっている。(Prior art) In general, an adsorption method using intermolecular attraction as a collecting means is often used as a method for efficiently recovering solvents from gas containing a low concentration of solvent (hereinafter referred to as raw gas), and activated carbon is used as an adsorbent. is used. The activated carbon adsorption method consists of a step in which solvents such as hydrocarbons, alcohols, ketones, and esters are adsorbed onto activated carbon from exhaust gas at room temperature, and a desorption step in which steam, heated gas, etc. are used.

有機溶剤処理装置として、上記したように活性炭吸着法
は最も一般的な処理方法であシ、中でも固定式吸着槽に
よる直接水蒸気脱着法が溶剤回収装置として最も多く普
及しているが、昨今回収メリットが少ない公害重視を目
的としたものが多く、従来のものより更に低廉で簡易的
な設備が要望されている。As mentioned above, the activated carbon adsorption method is the most common organic solvent treatment method, and the direct steam desorption method using a fixed adsorption tank is the most popular solvent recovery method. Many of these systems are designed to reduce pollution and focus on pollution, and there is a demand for equipment that is cheaper and simpler than conventional equipment.

ところで溶剤回収装置としては、第３図に示すものが一
般的に知られている。即ち、図中の１は原ガスであシ、
この原ガス１を吸着槽２−１゜２−２へ導くためのガス
プロア３と、原ガス１ｉ冷却するためのガスクーラ４を
経て吸着槽２−１゜２−２へ導ひかれるようになってい
る。By the way, as a solvent recovery device, one shown in FIG. 3 is generally known. That is, 1 in the figure is raw gas,
This raw gas 1 is guided to the adsorption tank 2-1゜2-2 through a gas blower 3 for guiding it to the adsorption tank 2-1゜2-2 and a gas cooler 4 for cooling the raw gas 1i. There is.

この吸着槽２−１．２−２には１檜につき吸着ライン５
に設けられたガス入口弁６−１と排気ライン７に設けら
れたガス出口弁８−１と、蒸気ライン９に設けられた蒸
気入口弁１０−１と蒸気出口弁１１−１の弁が付属され
ている。これらの弁は例えば制御器に接続されたタイマ
の指示に基づき、吸着槽２−１のガス入口弁６−１及び
出口弁８−１ヲ開（又は閉）、蒸気入口弁１０−１及び
出口弁１１−１を閉（又は開）にし、吸着［２−２のガ
ス入口弁６−２及び出口弁８−２ヲ閉（又は開）、蒸気
入口弁１０−２及び出口弁１１−２’ｉｉ開（又は閉）
にして吸着と脱着全繰返しておシ、脱着された溶剤と水
蒸気の留出液は、排出ライン１２に設けられた凝縮器１
３、セパレータ１４に導入され、溶剤の回収と排水が行
なわれている。This adsorption tank 2-1.2-2 has 5 adsorption lines per cypress.
A gas inlet valve 6-1 provided in the exhaust line 7, a gas outlet valve 8-1 provided in the exhaust line 7, and a steam inlet valve 10-1 and a steam outlet valve 11-1 provided in the steam line 9 are included. has been done. These valves open (or close) the gas inlet valve 6-1 and outlet valve 8-1 of the adsorption tank 2-1, and open (or close) the steam inlet valve 10-1 and the outlet valve, based on instructions from a timer connected to the controller, for example. Close (or open) the valve 11-1, close (or open) the gas inlet valve 6-2 and outlet valve 8-2 of adsorption [2-2, and close (or open) the steam inlet valve 10-2 and outlet valve 11-2'. ii open (or close)
After repeated adsorption and desorption, the desorbed solvent and water vapor distillate are transferred to the condenser 1 installed in the discharge line 12.
3. The solvent is introduced into the separator 14, where the solvent is recovered and drained.

このような溶剤回収装置においては、上記したように吸
着、脱着の度にガス入口弁６−１．６−２、ガス出口弁
８−１　、８−２、蒸気入口弁１０−１．１０−２、蒸
気出口弁１１−１．１１−２の切換を制御器（図示せず
）を介して自動で行なうなめ、自動切換システムが複雑
となっている。又、弁本体の作動トラブル、作動空気系
のトラブルや、ガス入口弁６−１　、６−２や蒸気出口
弁１１−１　、１１−２は溶剤による腐食や閉塞による
リーク等のトラブルが生じやすい不具合点を有していた
。In such a solvent recovery apparatus, as described above, each time adsorption or desorption is performed, the gas inlet valve 6-1.6-2, the gas outlet valves 8-1, 8-2, and the steam inlet valve 10-1.10- 2. The automatic switching system is complicated because the steam outlet valves 11-1 and 11-2 are automatically switched via a controller (not shown). In addition, troubles occur in the operation of the valve body, problems in the working air system, and problems such as leaks due to corrosion or blockage of the gas inlet valves 6-1, 6-2 and steam outlet valves 11-1, 11-2 due to solvents are likely to occur. It had some defects.

なお図中１５は活性炭層である。Note that 15 in the figure is an activated carbon layer.

（発明が解決しようとする問題点） 本発明は上記不具合点を解決するためになされたもので
、その目的とするところは弁の数を減少させ複雑な制御
システムを簡素化すると共に、設備費の低廉化と管理の
しやすい溶剤回数装置を提供するところにある。(Problems to be Solved by the Invention) The present invention has been made to solve the above-mentioned problems, and its purpose is to reduce the number of valves, simplify the complex control system, and reduce equipment costs. The purpose of the present invention is to provide a solvent recycling device that is inexpensive and easy to manage.

（問題点を解決するための手段） すなわち、本発明は、溶剤を吸着する活性炭を具え、ガ
ス出口弁と蒸気入口弁を具えた複数の吸管−檜と前記複
数の吸着槽に接続され、相互に連通された複数の凝縮器
と原ガスを吸引し、前記凝縮器の連通ラインへ導び〈吸
引手段と脱着時に前記凝縮器を介して凝縮された凝縮液
を溶剤と水に分離、回収する装置’を具えたことを特徴
とする溶剤回収装置である。(Means for Solving the Problems) That is, the present invention provides a plurality of suction pipes including activated carbon for adsorbing a solvent and having gas outlet valves and steam inlet valves connected to the plurality of adsorption tanks and mutually connected to each other. The raw gas is sucked into a plurality of condensers connected to the condenser, and the raw gas is guided to the communication line of the condenser. This is a solvent recovery device characterized by comprising a device.

本発明は、溶剤含有ガス処理装置として有利に適用する
ことができる。The present invention can be advantageously applied as a solvent-containing gas treatment device.

（構成） 以下、本発明装置を第１図に示す。(composition) The apparatus of the present invention is shown in FIG. 1 below.

第１図において１は原ガス、２−１　、２−２は吸着槽
、３はガスプロア、５線吸着ライン、７は排気ライン、
８−１　、８−２はガス出口弁、９は蒸気ライン、１０
−１．１０−２は蒸気入口弁、１２は排出ライン、１４
はセパレータ、１５は活性炭層を示しておシ、上記は第
３図の従来例と同一のものである。１０１，１０２は凝
縮器、１０３は連通ライン、１０４，１０５は原ガス１
及び溶剤含有蒸気の流入、流出ライン、１０６はアフタ
クーラを示している。In Fig. 1, 1 is the raw gas, 2-1 and 2-2 are adsorption tanks, 3 is a gas blower, 5-wire adsorption line, 7 is an exhaust line,
8-1, 8-2 are gas outlet valves, 9 is a steam line, 10
-1.10-2 is a steam inlet valve, 12 is a discharge line, 14
15 indicates a separator, and 15 indicates an activated carbon layer, which is the same as the conventional example shown in FIG. 101 and 102 are condensers, 103 is a communication line, and 104 and 105 are raw gas 1
and solvent-containing vapor inlet and outlet lines, 106 representing an aftercooler.

吸着槽２−１．２−２　ＩＣは、原ガス１に含有され良
溶剤を吸着捕集する活性炭層１５と清浄になったガス全
大気に放出する排気ライン７とこの排気ライン７に設け
られ吸着時には開、脱着時には閉となるガス出口弁８−
１　、８−２と脱着時に蒸気入口弁１０−１．１０−２
を介して水蒸気を当該吸着槽に導入する蒸気ライン９が
設けられておシ、又、後述する凝縮器１０１，１０２と
ライン１０４゜１０５’ｊ−介してそれぞれ接続されて
いる。この凝縮器１０１，１０２は連通ライン１０３で
相互に接続されておシ、脱着時に溶剤を含有する水蒸気
を凝縮させる水の流入、流出ラインが設けられている。Adsorption tank 2-1.2-2 The IC is installed in an activated carbon layer 15 that adsorbs and collects a good solvent contained in the raw gas 1, an exhaust line 7 that releases the purified gas to the entire atmosphere, and this exhaust line 7. Gas outlet valve 8- which opens during adsorption and closes during desorption.
1, 8-2 and steam inlet valve 10-1, 10-2 during installation and removal.
A steam line 9 is provided for introducing water vapor into the adsorption tank through a steam line 9, and is connected to condensers 101 and 102, which will be described later, through lines 104 and 105', respectively. The condensers 101 and 102 are connected to each other by a communication line 103, and are provided with inflow and outflow lines for water to condense water vapor containing a solvent during desorption.

（作用） 次に本発明装置の作用について第１図、第２図にもとづ
き説明する。吸着槽２−１及び２−２は第２図に示すよ
うに、運転初期から一方は吸着、一方は脱着工程にある
。いま、第１図に示すように吸着槽２−１のガス出口弁
８−１は開、蒸気入口弁１０−１は閉で吸着工程にあシ
、吸着槽２−２のガス出目弁６−２は閉、蒸気入口弁１
０−２は開で脱着工程にある。(Function) Next, the function of the device of the present invention will be explained based on FIGS. 1 and 2. As shown in FIG. 2, one of the adsorption tanks 2-1 and 2-2 is in the adsorption process and the other is in the desorption process from the beginning of operation. Now, as shown in FIG. 1, the gas outlet valve 8-1 of the adsorption tank 2-1 is open, the steam inlet valve 10-1 is closed and the adsorption process is in progress, and the gas outlet valve 6 of the adsorption tank 2-2 is closed. -2 is closed, steam inlet valve 1
0-2 is open and in the desorption process.

蒸気ライン９、蒸気入口弁１０−２　’ｉ介して吸着槽
２−２に入った蒸気は、溶剤と共にライン１０５を経て
凝縮器１０２に入）、凝縮されて凝縮液とな）、排出ラ
イン１２に流出しアフタクーラ１０６で冷却され、セパ
レータ１４で溶剤の回収と排水が行なわれる。又、原ガ
ス１は蒸気で充満されている凝縮器１０２へ入ることが
できず、連通ライン１０３から凝縮器１０１ライン１０
４を経て吸着槽２−１に入り、活性炭層１５で溶剤が吸
着捕集され清浄となった排ガスは排気ライン７から放出
づれる。なお脱着指令はタイマ、又は排ガス検知等によ
って行なわれるもので吸着、脱着が交互に行なわれてい
く。The steam entering the adsorption tank 2-2 through the steam line 9 and the steam inlet valve 10-2'i enters the condenser 102 along with the solvent through the line 105, where it is condensed into a condensate), and the discharge line 12. The solvent flows out to the aftercooler 106, where it is cooled, and the separator 14 collects and drains the solvent. In addition, the raw gas 1 cannot enter the condenser 102 filled with steam, and is routed from the communication line 103 to the condenser 101 line 10.
4, enters the adsorption tank 2-1, and the activated carbon layer 15 adsorbs and collects the solvent, and the purified exhaust gas is discharged from the exhaust line 7. Note that the desorption command is issued by a timer, exhaust gas detection, etc., and adsorption and desorption are performed alternately.

（効果） すなわち、本発明の溶剤ガス処理装置によれば、ガス入
口弁と蒸気出口弁を不要にしたことによシ、ガス出口弁
８−１．８−２及び蒸気入口弁１０−１．１Ｑ−２の切
換で連続処理が可能となり、自動切換システムが簡素化
されると共に、特に溶剤による腐食や、閉塞によるトラ
ブルがなくな夛管理がしやすくなる優れた効果を奏する
ものである。(Effects) That is, according to the solvent gas treatment apparatus of the present invention, by eliminating the need for the gas inlet valve and the steam outlet valve, the gas outlet valve 8-1.8-2 and the steam inlet valve 10-1. Continuous processing is possible by switching 1Q-2, and the automatic switching system is simplified. In particular, corrosion caused by solvents and troubles due to blockage are eliminated, making waste management easier.

なお、凝縮器ｊｏｂ、１０２を原ガスクｉう（図示せず
）Ｋ併用することも可能である。Note that it is also possible to use the condenser job 102 together with a raw gas tank (not shown).

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明装置の概要を示す図、第２図は２個の吸
着槽の吸・脱着操作時の対応を示す図表、第３図は従来
装置の概要を示す図である。 復代理人　内　１）　　明 復代理人　萩　原　亮　− 第１図 第２図 排気　　　　　　排気FIG. 1 is a diagram showing an outline of the apparatus of the present invention, FIG. 2 is a chart showing the correspondence during adsorption/desorption operations of two adsorption tanks, and FIG. 3 is a diagram showing an outline of a conventional apparatus. Sub-agents 1) Meikoku agent Ryo Hagiwara - Figure 1 Figure 2 Exhaust Exhaust

Claims (1)

【特許請求の範囲】[Claims] 溶剤を吸着捕集する活性炭を具え、ガス出口弁と蒸気入
口弁を具えた複数の吸着槽と前記複数の吸着槽に接続さ
れ、相互に連通された複数の凝縮器と原ガスを吸引し、
前記凝縮器の連通ラインへ導びく吸引手段と脱着時に前
記凝縮器を介して凝縮された凝縮液を溶剤と水に分離、
回収する手段を具えたことを特徴とする溶剤回収装置。A plurality of adsorption tanks are provided with activated carbon for adsorbing and collecting solvents, each having a gas outlet valve and a steam inlet valve, and a plurality of condensers connected to the plurality of adsorption tanks and communicated with each other, sucking the raw gas;
A suction means leading to a communication line of the condenser and separating the condensed liquid condensed through the condenser during desorption into a solvent and water;
A solvent recovery device characterized by comprising a means for recovering.