JP2001137804A - Method for treating waste liquid crystal display device and treating device for the same - Google Patents

Method for treating waste liquid crystal display device and treating device for the same

Info

Publication number
JP2001137804A
JP2001137804A JP32334699A JP32334699A JP2001137804A JP 2001137804 A JP2001137804 A JP 2001137804A JP 32334699 A JP32334699 A JP 32334699A JP 32334699 A JP32334699 A JP 32334699A JP 2001137804 A JP2001137804 A JP 2001137804A
Authority
JP
Japan
Prior art keywords
liquid crystal
crystal display
display device
waste liquid
fluidized bed
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.)
Granted
Application number
JP32334699A
Other languages
Japanese (ja)
Other versions
JP3638836B2 (en
Inventor
Yasuo Yoshii
泰雄 吉井
Hiroshi Kawagoe
博 川越
Atsushi Morihara
森原  淳
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP32334699A priority Critical patent/JP3638836B2/en
Publication of JP2001137804A publication Critical patent/JP2001137804A/en
Application granted granted Critical
Publication of JP3638836B2 publication Critical patent/JP3638836B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Processing Of Solid Wastes (AREA)

Abstract

PROBLEM TO BE SOLVED: To recover liquid crystals and organic matter (films) by making these liquid crystals, or the like, non-polluting without using an organic solvent and to recover glass and indium from waste liquid crystal display devices. SOLUTION: The waste liquid crystal display devices having organic compounds containing liquid crystal compounds, metals and glass substrates are brought into contact with a solid heat medium in an atmosphere at the melting point of the glass substrates or below and above the pyrolysis temperature of the liquid crystal compounds, by which the organic compd. containing the liquid crystal compounds is decomposed and the glass and metals are recovered.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は廃液晶表示装置の処
理方法及び処理装置に関し、特にガラス基板および有価
金属であるインジウムを回収するのに適した廃液晶表示
装置の処理方法及び処理装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing method and a processing apparatus for a waste liquid crystal display device, and more particularly to a processing method and a processing apparatus for a waste liquid crystal display device suitable for recovering a glass substrate and indium which is a valuable metal.

【0002】[0002]

【従来の技術】従来の廃液晶表示装置の処理方法として
は、特開平6−321581 号公報,特許第2538500 号に湿式
法が開示されている。湿式法では液晶表示装置を構成す
る数種類の薄膜を除去した後、ガラス基板を再生するた
めに、苛性ソーダ水等の強アルカリ溶液や王水,塩酸等
の強酸液で処理し、更に数種類の有機溶媒等を用いる複
雑な工程を必要とする。
2. Description of the Related Art As a conventional processing method of a waste liquid crystal display device, a wet method is disclosed in Japanese Patent Application Laid-Open No. Hei 6-321581 and Japanese Patent No. 2538500. In the wet method, after removing several kinds of thin films constituting the liquid crystal display device, in order to regenerate the glass substrate, the glass substrate is treated with a strong alkali solution such as caustic soda water or a strong acid solution such as aqua regia or hydrochloric acid, and further, several kinds of organic solvents are used. A complicated process using such as is required.

【0003】一方、特開平9−323076 号公報にはプラス
チック・金属積層体の廃棄物を、流動層を形成する熱媒
体と直接接触させることにより、プラスチックを除去し
金属を回収することの開示がある。また、特開平9−323
075 号公報にはプラスチック・金属積層体の廃棄物を、
流動層を形成する熱媒体と伝熱面を介して間接接触させ
ることによりプラスチックを除去し金属を回収すること
の開示がある。しかし、これらはいずれも廃液晶表示装
置を対象とするものではない。
[0003] On the other hand, Japanese Patent Application Laid-Open No. 9-323076 discloses that the waste of a plastic / metal laminate is brought into direct contact with a heat medium forming a fluidized bed to remove the plastic and recover the metal. is there. Also, JP-A-9-323
No. 075 discloses plastic / metal laminate waste,
There is a disclosure of removing plastic and recovering metal by making indirect contact via a heat transfer surface with a heat medium that forms a fluidized bed. However, none of these are intended for waste liquid crystal display devices.

【0004】[0004]

【発明が解決しようとする課題】本発明は液晶化合物を
含む有機化合物,金属及びガラス基板を含む廃液晶表示
装置から、有機溶媒を用いることなくガラス及び有価金
属であるインジウムを回収できるようにした廃液晶表示
装置の処理方法および装置を提供する。
SUMMARY OF THE INVENTION The present invention enables glass and indium, a valuable metal, to be recovered from an organic compound containing a liquid crystal compound, a metal, and a waste liquid crystal display device containing a glass substrate without using an organic solvent. A method and apparatus for treating a waste liquid crystal display device is provided.

【0005】[0005]

【課題を解決するための手段】本発明は、廃棄された液
晶表示装置を加熱して液晶化合物を含む有機化合物を分
解した後、ガラス及びインジウム等の金属を分離,回収
することにある。廃液晶表示装置からガラス及びインジ
ウム等の金属を分離,回収するに当たっては、固体の熱
媒体粒子を充填した流動層を使用することが望ましい。
流動層内には空気等の流動化用ガスを吹き込み、熱媒体
粒子を流動させる。そして、廃液晶表示装置を丸ごと或
いは適当な大きさに破砕して流動層内に挿入する。流動
層は、液晶化合物を含む有機化合物が分解する温度でガ
ラスが溶融しない温度に加熱する。
SUMMARY OF THE INVENTION It is an object of the present invention to separate and recover metals such as glass and indium after heating a discarded liquid crystal display to decompose an organic compound including a liquid crystal compound. In separating and recovering metals such as glass and indium from the waste liquid crystal display device, it is desirable to use a fluidized bed filled with solid heat carrier particles.
A fluidizing gas such as air is blown into the fluidized bed to flow the heat carrier particles. Then, the waste liquid crystal display device is crushed as a whole or an appropriate size and inserted into the fluidized bed. The fluidized bed is heated to a temperature at which the organic compound including the liquid crystal compound is decomposed and the glass is not melted.

【0006】このようにすることにより、液晶化合物を
含む有機化合物は分解してガス化する。有機化合物が分
解されることによって、ガラス基板及びインジウム等の
金属は分離される。また、熱媒体粒子によってガラス基
板表面がこすられることによって、インジウム等の金属
がガラス基板からはがれ、ガラス基板は付着物の少ない
高品質の状態となる。インジウム等の金属は、そのほと
んどが有機化合物の分解ガスに同伴して流動層から排出
されるので、流動層から排出されたガスをサイクロン或
いはフィルター等を備えた粒子捕捉器に通すことによっ
て、ガス中に含まれる粒子を回収する。廃液晶表示装置
を流動層内に投入するのは、熱媒体粒子が流動している
状態或いは静止している状態のいずれでもよいが、熱媒
体粒子が流動状態にあるときに廃液晶表示装置を投入す
る方が好ましい。熱媒体粒子が静止しているときに廃液
晶表示装置を投入すると、重力で廃液晶表示装置が底部
に沈みこみ、廃液晶表示装置を流動させるのに高い動
力、たとえば流動化用ガスを高流速で吹き込む必要があ
るが、熱媒体粒子が流動状態にあるところに廃液晶表示
装置を投入すれば低流速で廃液晶表示装置を流動させる
ことができる。
By doing so, the organic compound including the liquid crystal compound is decomposed and gasified. When the organic compound is decomposed, the glass substrate and the metal such as indium are separated. In addition, when the surface of the glass substrate is rubbed by the heat medium particles, metal such as indium is peeled off from the glass substrate, and the glass substrate is in a high quality state with few attached substances. Most of metals such as indium are discharged from the fluidized bed along with the decomposition gas of the organic compound, so that the gas discharged from the fluidized bed is passed through a particle trap equipped with a cyclone or a filter, so that the gas is discharged. Collect the particles contained therein. The waste liquid crystal display device may be charged into the fluidized bed either in a state in which the heat medium particles are flowing or in a stationary state. It is preferable to put them. When the waste liquid crystal display device is turned on while the heat carrier particles are stationary, the waste liquid crystal display device sinks to the bottom due to gravity, and high power is required to flow the waste liquid crystal display device, for example, a high flow rate of fluidizing gas. However, if the waste liquid crystal display device is put in a place where the heat medium particles are in a flowing state, the waste liquid crystal display device can be caused to flow at a low flow rate.

【0007】流動層は、仕切り板を鉛直方向に配置する
ことによって二つのセルに分割し、一方のセルから他方
のセルに熱媒体粒子が循環できるようにすることが望ま
しい。また、各セルには独立に流動化用ガスを吹き込め
るようにし、流動化用ガスの流速をセル毎に変えられる
ようにすることが望ましい。また、廃液晶表示装置の処
理においては、一方のセルの流動化用ガスの流速を他方
のセルの流動化用ガスの流速に比べて遅くし、流速が遅
い方のセルからガラスを取り出すようにすることが望ま
しい。高流速側のセルは、主にガラス表面から付着物を
除くのに利用し、低流速側のセルはガラス回収率を高め
るために利用する。高流速側のセルの流速(A)と低流
速側のセルの流速(B)との比(A/B)は、2ないし
5にすることが望ましい。高流速側のセルの流速は5な
いし80cm/sec が望ましい。最も望ましいのは、低流
速側のセルの流速を5〜15cm/sec ,高流速側のセル
の流速を20〜40cm/sec とすることである。
It is desirable that the fluidized bed is divided into two cells by disposing a partition plate in a vertical direction so that heat medium particles can be circulated from one cell to the other cell. Further, it is desirable that the fluidizing gas can be blown into each cell independently so that the flow rate of the fluidizing gas can be changed for each cell. Further, in the processing of the waste liquid crystal display device, the flow rate of the fluidizing gas in one cell is made slower than the flow rate of the fluidizing gas in the other cell so that the glass is taken out from the cell having the lower flow rate. It is desirable to do. The cells on the high flow rate side are mainly used to remove deposits from the glass surface, and the cells on the low flow rate side are used to increase the glass recovery rate. The ratio (A / B) of the flow rate (A) of the cell on the high flow rate side to the flow rate (B) of the cell on the low flow rate side is desirably 2 to 5. The flow velocity of the cell on the high flow velocity side is desirably 5 to 80 cm / sec. Most preferably, the flow velocity of the cell on the low flow velocity side is 5 to 15 cm / sec, and the flow velocity of the cell on the high flow velocity side is 20 to 40 cm / sec.

【0008】熱媒体粒子の材料は、ジルコンサンド,窒
化けい素,アルミナボール等が適する。粒子の大きさ
は、0.5mm 以下が好ましい。熱媒体粒子のモース硬度
は7以上が好ましい。
As the material of the heat carrier particles, zircon sand, silicon nitride, alumina balls and the like are suitable. The size of the particles is preferably 0.5 mm or less. The Mohs hardness of the heat medium particles is preferably 7 or more.

【0009】流動層の加熱温度は、ガラス基板が無アル
カリガラスのときには、500ないし800℃が好まし
く、ソーダライムガラスのときには500ないし600
℃が好ましい。これらの温度範囲であれば、有機化合物
は分解しても、ガラスは溶融しない。
The heating temperature of the fluidized bed is preferably 500 to 800 ° C. when the glass substrate is non-alkali glass, and 500 to 600 ° C. when the glass substrate is soda lime glass.
C is preferred. In these temperature ranges, the glass does not melt even if the organic compound is decomposed.

【0010】[0010]

【発明の実施の形態】以下、本発明の実施例を示すが、
本発明はこれらの実施例に限定されるものではない。ま
た、本発明は、一般に使用されている液晶表示装置全般
に適用できるものであり、特定の型式の液晶表示装置を
対象とするものではない。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
The present invention is not limited to these examples. Further, the present invention can be applied to generally used liquid crystal display devices in general, and is not intended for a specific type of liquid crystal display device.

【0011】(実施例1)図1は、本発明の廃液晶表示
装置処理装置の構成を示す系統図である。
(Embodiment 1) FIG. 1 is a system diagram showing a configuration of a waste liquid crystal display device processing apparatus of the present invention.

【0012】本発明の処理装置は流動層1,ガラス収容
容器13,サイクロン16,ガス冷却器18,金属回収
装置19,排ガス無害化装置21等から構成される。
The processing apparatus of the present invention comprises a fluidized bed 1, a glass container 13, a cyclone 16, a gas cooler 18, a metal recovery unit 19, an exhaust gas detoxification unit 21 and the like.

【0013】流動層1は鉛直方向に配置された流動層仕
切り板7により第1のセル7aと第2のセル7bに分割
されており、例えば第1のセル7aでは空塔速度が25
cm/sec ,第2のセル7bでは空塔速度が10cm/sec
になるように燃焼用空気を供給する。この時、流動媒体
(熱媒体粒子)15は流速の遅い第2のセル7bから第
1のセル7aへ循環する。燃焼用空気は、送風ブロア1
2から空気加熱ヒータ11,ウィンドボックス10,ガ
ス散気管9を経て流動層1内へ吹き込む。流動層内のガ
ス散気管9の上には金網8が設けられており、金網8上
に流動媒体が充填される。流動媒体の温度は熱電対23
によって計測され、流動層加熱ヒータ36の温度等を制
御する。
The fluidized bed 1 is divided into a first cell 7a and a second cell 7b by a fluidized bed partition plate 7 arranged in a vertical direction. For example, in the first cell 7a, the superficial velocity is 25%.
cm / sec, the superficial velocity in the second cell 7b is 10 cm / sec.
Supply combustion air so that At this time, the fluid medium (heat medium particles) 15 circulates from the second cell 7b having the slow flow velocity to the first cell 7a. The combustion air is blower 1
2, the air is blown into the fluidized bed 1 through the air heater 11, the wind box 10, and the gas diffuser 9. A wire mesh 8 is provided on the gas diffuser 9 in the fluidized bed, and the wire mesh 8 is filled with a fluid medium. The temperature of the flowing medium is the thermocouple 23
And the temperature of the fluidized bed heater 36 is controlled.

【0014】廃液晶表示装置22は廃液晶表示装置投入
口2から投入し、これが流動層1内で燃焼されると液晶
及びガラス基板の表面に接着している偏光板,カラーフ
ィルタ等の有機フィルム(有機化合物)は水,炭酸ガ
ス,メタンなどに熱分解した後、無害化した状態で除去
される。流動層1内に残ったガラス基板は流動媒体15
と循環流動されることで、ある大きさまでに粉砕され
る。処理されたガラス基板は流速の遅い第2のセルの流
動層表面に浮上したところをガラス回収器であるガラス
搬出かご4により捕集し、回収ガラス排出口3からガラ
ス収容容器13へ回収する。ガラス搬出かご4の位置設
定はガラス搬出案内機構5により制御する。流動層1か
ら回収ガラスをガラス収容容器13へ搬出する時は、振
動装置6,14によりガラス搬出かご4に振動を与え回
収ガラスの移動を容易にする。流動層1の後流にはサイ
クロン16が設置されており、ここでは主に飛散した流
動媒体15をガスから分離して、これを流動媒体用回収
容器17へ回収する。流動媒体用回収容器17から流動
媒体15を系外へ取り出す時は弁31を閉じる。サイク
ロン16の後流には金属回収装置19が設置してあり、
本実施例の場合、金属回収装置19は高温バグフィルタ
である。高温バグフィルタの最高使用温度は200℃程
度であるので、ガス冷却器18により高温バグフィルタ
の入口ガス温度を200℃程度まで冷却する。高温バグ
フィルタのフィルタ部に捕集されたインジウム等の金属
微粒子は払落装置35により除去し、金属回収容器20
に回収する。金属回収容器20に捕集した微量金属を系
外へ取り出す時は弁32を閉じる。金属回収装置19の
後流には排ガス無害化装置21が設置してある。排ガス
処理は燃焼触媒等を使用して行うことが望ましい。排ガ
ス無害化装置21では、主に排ガス中の未燃分であるベ
ンゼン等の炭化水素系ガスを酸化分解する。例えばベン
ゼンは式(1)により触媒上で炭酸ガスと水に酸化分解
される。
The waste liquid crystal display device 22 is supplied from the waste liquid crystal display device input port 2, and when it is burned in the fluidized bed 1, an organic film such as a polarizing plate or a color filter adhered to the surface of the liquid crystal and the glass substrate. The (organic compound) is thermally decomposed into water, carbon dioxide, methane and the like, and then removed in a detoxified state. The glass substrate remaining in the fluidized bed 1 is a fluid medium 15
By circulating and flowing, it is pulverized to a certain size. The processed glass substrate floats on the surface of the fluidized bed of the second cell having a low flow rate, is collected by a glass carry-out basket 4 as a glass recovery device, and is recovered from a recovery glass outlet 3 into a glass container 13. The position setting of the glass unloading car 4 is controlled by the glass unloading guide mechanism 5. When unloading the recovered glass from the fluidized bed 1 to the glass container 13, the glass unloading basket 4 is vibrated by the vibration devices 6 and 14 to facilitate the movement of the recovered glass. A cyclone 16 is installed downstream of the fluidized bed 1. Here, the scattered fluid medium 15 is mainly separated from the gas, and the separated gas is collected in the fluid medium collection container 17. When the fluid medium 15 is taken out of the fluid medium recovery container 17 out of the system, the valve 31 is closed. A metal recovery device 19 is installed downstream of the cyclone 16.
In the case of the present embodiment, the metal recovery device 19 is a high-temperature bag filter. Since the maximum use temperature of the high-temperature bag filter is about 200 ° C., the gas cooler 18 cools the inlet gas temperature of the high-temperature bag filter to about 200 ° C. Metal particles such as indium collected in the filter section of the high-temperature bag filter are removed by the dropping device 35 and the metal collection container 20 is removed.
To be collected. When the trace metal collected in the metal recovery container 20 is taken out of the system, the valve 32 is closed. An exhaust gas detoxification device 21 is installed downstream of the metal recovery device 19. The exhaust gas treatment is desirably performed using a combustion catalyst or the like. The exhaust gas detoxification device 21 mainly oxidizes and decomposes a hydrocarbon-based gas such as benzene, which is an unburned component in the exhaust gas. For example, benzene is oxidatively decomposed into carbon dioxide and water on the catalyst by the formula (1).

【0015】 2C+15O → 12CO+6HO (1) 触媒を充填した排ガス無害化装置21の入口ガス温度は
約200℃となるが、触媒の性能試験結果によると、こ
の反応温度では流動層1から発生するベンゼン,トルエ
ン等の有機物ガスを充分に酸化分解できることを確認し
ている。よって金属回収装置19と排気ガス無害化装置
21の間にはガス温度を昇温するためのガス加熱器を設
置する必要はない。
2C 6 H 6 + 15O 2 → 12CO 2 + 6H 2 O (1) The inlet gas temperature of the exhaust gas detoxification device 21 filled with the catalyst is about 200 ° C. According to the performance test result of the catalyst, this reaction temperature Has confirmed that organic gasses such as benzene and toluene generated from the fluidized bed 1 can be sufficiently oxidatively decomposed. Therefore, it is not necessary to install a gas heater for increasing the gas temperature between the metal recovery device 19 and the exhaust gas detoxification device 21.

【0016】図2及び図3は実施例1の効果を示す。図
2は回収ガラス中のインジウム(In)濃度と反応温度
の関係を示す。一般に液晶表示装置は、ガラス基板上に
インジウム−錫酸化物よりなる層を有しており、このイ
ンジウムがガラスと反応するおそれがある。廃液晶表示
装置はTFT(Thin Film Transistor)型である。実線
で示す空塔速度条件1は、流動層仕切り板7によって分
割された流動層1内の第1のセルと第2のセルに同じ量
の流動用空気を供給し、空塔速度を両セルともa(cm/
s)とした場合である。破線で示す空塔速度条件2は、
空塔速度を第1のセルではa(cm/s)、第2のセルで
はb(cm/s),a>bと異なるように設定した場合で
ある。
FIGS. 2 and 3 show the effect of the first embodiment. FIG. 2 shows the relationship between the indium (In) concentration in the recovered glass and the reaction temperature. Generally, a liquid crystal display device has a layer made of indium-tin oxide on a glass substrate, and this indium may react with glass. The waste liquid crystal display device is a TFT (Thin Film Transistor) type. The superficial velocity condition 1 indicated by the solid line is such that the same amount of air for flow is supplied to the first cell and the second cell in the fluidized bed 1 divided by the fluidized-bed partition plate 7, and the superficial velocity is reduced to both cells. Tomo a (cm /
s). The superficial velocity 2 shown by the broken line is
In this case, the superficial velocity is set to be a (cm / s) in the first cell, b (cm / s) in the second cell, and a> b.

【0017】空塔速度条件2では空塔速度条件1に比
べ、回収ガラス中のインジウム(In)濃度は少なく純度
の高いガラスが得られた。空塔速度差をつけたほうが分
離されたガラスが流動層内部を循環し、流動媒体15と
の接触時間が高まるため純度の高いガラスが得られたと
考えられる。
Under the superficial velocity condition 2, as compared with the superficial velocity condition 1, a glass having a low indium (In) concentration in the recovered glass and a high purity was obtained. It is considered that the separated glass circulates inside the fluidized bed and the contact time with the fluidized medium 15 is increased when the superficial velocity difference is made, so that glass with high purity is obtained.

【0018】また反応温度が高くなると回収ガラス中の
インジウム(In)濃度が高くなるが、これは流動媒体
の温度がガラス軟化温度に近づいたためにガラスが溶
融,変形し、ガラス表面が研削或いは摩耗されにくくな
ったためと考えられる。試験によるとTFT型液晶表示
装置の場合は流動媒体の温度が800℃以下,STM
(Super Twisted Nematic)型液晶表示装置の場合は6
50℃以下であることが好ましい。
As the reaction temperature increases, the indium (In) concentration in the recovered glass increases. However, the temperature of the flowing medium approaches the glass softening temperature, so that the glass melts and deforms, and the glass surface is ground or worn. It is thought that it became difficult to be done. According to the test, in the case of the TFT type liquid crystal display device, the temperature of the fluid medium is 800 ° C. or less,
(Super Twisted Nematic) type liquid crystal display device: 6
It is preferably 50 ° C. or lower.

【0019】図3は回収ガラス中の金属(インジウムと
錫)濃度と空塔速度の関係を示す。図中の○印はインジ
ウム(In)濃度,□印は錫(Sn)濃度である。ST
N型の廃液晶表示装置を用いて、反応温度600℃,反
応時間60分で処理した場合である。空塔速度を増加す
ると回収ガラス中のIn及びSnの濃度は減少する。こ
れは空塔速度が増大すると流動固体熱媒体によるガラス
表面の摩耗が促進され、In及びSnの剥離がより進行
するためである。
FIG. 3 shows the relationship between the metal (indium and tin) concentration in the recovered glass and the superficial velocity. In the figure, the mark ○ indicates the indium (In) concentration, and the mark □ indicates the tin (Sn) concentration. ST
This is a case where treatment is performed at a reaction temperature of 600 ° C. and a reaction time of 60 minutes using an N-type waste liquid crystal display device. As the superficial velocity increases, the concentrations of In and Sn in the recovered glass decrease. This is because when the superficial velocity increases, the abrasion of the glass surface by the fluidized solid heat medium is promoted, and the separation of In and Sn further proceeds.

【0020】本実施例の廃液晶表示装置処理装置によれ
ば、液晶を含む有機化合物を、有機溶媒を用いることな
く熱分解して無害化することができる。またガラス及び
インジウムを高い純度で回収することができる。
According to the waste liquid crystal display device processing apparatus of the present embodiment, the organic compound containing liquid crystal can be made harmless by thermal decomposition without using an organic solvent. Further, glass and indium can be recovered with high purity.

【0021】(実施例2)図4は、本発明の別の廃液晶
表示装置処理装置の系統図である。
(Embodiment 2) FIG. 4 is a system diagram of another waste liquid crystal display device processing apparatus of the present invention.

【0022】本実施例の金属回収装置はセラミックフィ
ルタ容器24,セラミックフィルタエレメント25から
構成される。セラミックフィルタエレメント25からイ
ンジウム等の有価金属微粒子を分離,回収する時は、コ
ンプレッサ28から逆洗用空気をバッファタンク27に
供給し、一定間隔で逆洗用パルス弁26を開閉して空気
を供給することで、セラミックフィルタエレメント25
に付着した金属微粒子を払い落とす。金属微粒子は金属
回収容器20へ回収する。金属回収容器20に捕集した
金属を系外へ取り出す時は弁32を閉じる。セラミック
フィルタの入り口ガス温度は約500℃の高温である
が、セラミックフィルタは耐熱性であるため実施例1で
設置したガス冷却器18を不要とする。
The metal recovery apparatus of the present embodiment comprises a ceramic filter container 24 and a ceramic filter element 25. When separating and recovering valuable metal particles such as indium from the ceramic filter element 25, backwash air is supplied to the buffer tank 27 from the compressor 28, and air is supplied by opening and closing the backwash pulse valve 26 at regular intervals. By doing so, the ceramic filter element 25
The metal fine particles adhered to the surface are removed. The metal fine particles are collected in a metal collection container 20. When the metal collected in the metal recovery container 20 is taken out of the system, the valve 32 is closed. Although the inlet gas temperature of the ceramic filter is as high as about 500 ° C., the ceramic filter has heat resistance, so that the gas cooler 18 installed in the first embodiment is unnecessary.

【0023】本実施例の廃液晶表示装置処理装置によっ
ても、液晶を含む有機化合物を、有機溶媒を使用するこ
となく熱分解して無害化することができる。またガラス
およびインジウムを回収することができる。
According to the waste liquid crystal display device processing apparatus of the present embodiment, the organic compound containing liquid crystal can be detoxified by thermal decomposition without using an organic solvent. Further, glass and indium can be recovered.

【0024】なお、セラミックフィルタエレメント25
上に燃焼触媒を担持して、排ガス処理を同時に行わせ、
排ガス無害化装置21を省略することも可能である。
The ceramic filter element 25
Carrying a combustion catalyst on top, and simultaneously performing exhaust gas treatment,
The exhaust gas detoxification device 21 can be omitted.

【0025】(実施例3)図5は、本発明の別の廃液晶
表示装置処理装置の構成を示す系統図である。
(Embodiment 3) FIG. 5 is a system diagram showing the configuration of another waste liquid crystal display device processing apparatus according to the present invention.

【0026】本実施例では流動層1の後流に設置したサ
イクロン16において、飛散した流動媒体15を排ガス
から分離して、これを流動媒体用回収容器17へ回収す
る。流動媒体用回収容器17内に収容された流動媒体
は、一定間隔で弁34を開け、流動媒体回収用ダクト3
3を介して流動層1内へ戻す。通常は弁34を閉じてお
く。このようにすれば、飛散した流動媒体の回収,再使
用ができる。
In this embodiment, the scattered fluid medium 15 is separated from the exhaust gas in the cyclone 16 installed downstream of the fluidized bed 1 and collected in the fluid medium recovery container 17. The fluid medium contained in the fluid medium collection container 17 opens the valve 34 at regular intervals, and the fluid medium collection duct 3
3 into the fluidized bed 1. Normally, the valve 34 is closed. In this way, the scattered fluid medium can be collected and reused.

【0027】[0027]

【発明の効果】以上記載のとおり、本発明によれば、液
晶化合物を含む有機化合物,金属及びガラス基板を含む
廃液晶表示装置から、有機溶媒を用いることなく、液
晶,有機物(フィルム類)を無害化して除去し、ガラス
及び有価金属であるインジウムを回収できる。
As described above, according to the present invention, liquid crystals and organic substances (films) can be obtained from an organic compound including a liquid crystal compound, a waste liquid crystal display including a metal and a glass substrate without using an organic solvent. It is made harmless and removed, and glass and indium which is a valuable metal can be recovered.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の廃液晶表示装置処理装置の構成を示す
系統図である。
FIG. 1 is a system diagram showing a configuration of a waste liquid crystal display device processing apparatus of the present invention.

【図2】本発明の廃液晶表示装置処理方法の効果を示す
図。
FIG. 2 is a diagram showing the effect of the waste liquid crystal display device processing method of the present invention.

【図3】本発明の廃液晶表示装置処理方法の効果を示す
図。
FIG. 3 is a diagram showing the effect of the waste liquid crystal display device processing method of the present invention.

【図4】本発明の別の廃液晶表示装置処理装置の構成を
示す系統図である。
FIG. 4 is a system diagram showing a configuration of another waste liquid crystal display device processing apparatus of the present invention.

【図5】本発明の別の廃液晶表示装置処理装置の構成を
示す系統図である。
FIG. 5 is a system diagram showing a configuration of another waste liquid crystal display device processing device of the present invention.

【符号の説明】[Explanation of symbols]

1…流動層、2…廃液晶表示装置投入口、3…回収ガラ
ス排出口、4…ガラス搬出かご、5…ガラス搬出案内機
構、6…振動装置、7…流動層仕切り板、7a…第1の
セル、7b…第2のセル、8…金網、9…ガス散気管、
10…ウインドボックス、11…空気加熱ヒータ、12
…送風ブロア、13…ガラス収容容器、14…振動発生
器、15…流動媒体、16…サイクロン、17…流動媒
体用回収容器、18…ガス冷却器、19…金属回収装
置、20…金属回収容器、21…排気ガス無害化装置
(触媒層)、22…廃液晶表示装置、23…熱電対、2
4…セラミックフィルタ容器、25…セラミックフィル
タエレメント、26…逆洗用パルス弁、27…バッファ
タンク、28…コンプレッサ、29…金属回収装置、3
0…触媒を坦持したセラミックフィルタエレメント、3
1、34…流動媒体回収用弁、32…金属回収用弁、3
3…流動媒体回収用ダクト、35…払落装置、36…流
動層加熱ヒータ。
DESCRIPTION OF SYMBOLS 1 ... Fluidized bed, 2 ... Waste liquid crystal display apparatus inlet, 3 ... Recovered glass outlet, 4 ... Glass unloading basket, 5 ... Glass unloading guide mechanism, 6 ... Vibration device, 7 ... Fluidized bed partition plate, 7a ... 1st Cell, 7b: second cell, 8: wire mesh, 9: gas diffuser,
10 ... wind box, 11 ... air heater, 12
... Blower blower, 13 ... Glass storage container, 14 ... Vibration generator, 15 ... Flow medium, 16 ... Cyclone, 17 ... Flow medium recovery container, 18 ... Gas cooler, 19 ... Metal recovery device, 20 ... Metal recovery container , 21 ... Exhaust gas detoxification device (catalyst layer), 22 ... Waste liquid crystal display device, 23 ... Thermocouple, 2
4: Ceramic filter container, 25: Ceramic filter element, 26: Pulse valve for backwash, 27: Buffer tank, 28: Compressor, 29: Metal recovery device, 3
0 ... Ceramic filter element supporting catalyst, 3
1, 34: valve for recovering fluid medium, 32: valve for recovering metal, 3
3: Fluid medium recovery duct, 35: Flushing device, 36: Fluidized bed heater.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 森原 淳 茨城県日立市大みか町七丁目2番1号 株 式会社日立製作所電力・電機開発研究所内 Fターム(参考) 4D004 AA22 AA24 AB10 AC05 BA05 BA06 CA22 CA24 CB02 CB36 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Atsushi Morihara 7-2-1, Omika-cho, Hitachi City, Ibaraki Prefecture F-term in the Electric Power and Electric Power Development Laboratory, Hitachi, Ltd. 4D004 AA22 AA24 AB10 AC05 BA05 BA06 CA22 CA24 CB02 CB36

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】液晶化合物を含む有機化合物と金属及びガ
ラス基板とを有する廃液晶表示装置の処理方法であっ
て、該廃液晶表示装置をガラス基板の融点以下かつ液晶
化合物を含む有機化合物の熱分解温度以上の温度に加熱
して該有機化合物を分解し、ガラス及び金属を分離する
ことを特徴とする廃液晶表示装置の処理方法。
1. A method for treating a waste liquid crystal display device comprising an organic compound containing a liquid crystal compound, a metal and a glass substrate, wherein the waste liquid crystal display device is heated to a temperature lower than the melting point of the glass substrate and the organic compound containing the liquid crystal compound. A method for treating a waste liquid crystal display device, wherein the organic compound is decomposed by heating to a temperature higher than the decomposition temperature to separate glass and metal.
【請求項2】有機化合物と金属及びガラス基板を含む廃
液晶表示装置の処理方法であって、該廃液晶表示装置
を、固体粒子が流動する層内で前記ガラス基板の融点以
下かつ前記有機化合物の熱分解温度以上の温度に加熱し
て該有機化合物を分解し、ガラス及び金属を回収するこ
とを特徴とする廃液晶表示装置の処理方法。
2. A method for treating a waste liquid crystal display device comprising an organic compound, a metal and a glass substrate, wherein the waste liquid crystal display device is disposed in a layer in which solid particles flow, at a temperature lower than the melting point of the glass substrate and the organic compound. A method for treating a waste liquid crystal display device, comprising decomposing the organic compound by heating to a temperature equal to or higher than the thermal decomposition temperature to recover glass and metal.
【請求項3】有機化合物と金属及びガラス基板を含む廃
液晶表示装置の処理方法であって、該廃液晶表示装置
を、熱媒体粒子が流動する流動層内で、前記ガラス基板
の融点以下かつ前記有機化合物の熱分解温度以上の温度
に加熱して該有機化合物を分解除去し、その後、該流動
層内に残ったガラス基板を回収し、該流動層から排出さ
れるガスに含まれる金属を回収することを特徴とする廃
液晶表示装置の処理方法。
3. A method for treating a waste liquid crystal display device comprising an organic compound, a metal and a glass substrate, wherein the waste liquid crystal display device is disposed in a fluidized bed in which heat medium particles flow, at a temperature lower than the melting point of the glass substrate and The organic compound is decomposed and removed by heating to a temperature equal to or higher than the thermal decomposition temperature of the organic compound, and thereafter, the glass substrate remaining in the fluidized bed is recovered, and the metal contained in the gas discharged from the fluidized bed is removed. A method for treating a waste liquid crystal display device, comprising collecting the waste liquid crystal display device.
【請求項4】熱媒体粒子が充填された流動層と、該流動
層に該熱媒体粒子の流動化用ガスを吹き込むガス吹き込
み装置と、該流動層で廃液晶表示装置が加熱され液晶化
合物を含む有機化合物が分解されることによって分離さ
れたガラス基板を該流動層から回収するガラス回収器
と、該流動層より排出されたガスに同伴する金属粒子を
該ガスから分離する粒子捕捉器とを具備する廃液晶表示
装置の処理装置であって、該流動層が仕切り板によって
二つのセルに分割され、熱媒体粒子が二つのセルを循環
し、各セル毎に独立に該流動化用ガスの流速が変えられ
るようにしたことを特徴とする廃液晶表示装置の処理装
置。
4. A fluidized bed filled with heating medium particles, a gas blowing device for blowing a gas for fluidizing the heating medium particles into the fluidized bed, and a waste liquid crystal display device is heated by the fluidized bed to form a liquid crystal compound. A glass recovery device that recovers the glass substrate separated by decomposing the organic compound from the fluidized bed, and a particle trap that separates the metal particles accompanying the gas discharged from the fluidized bed from the gas. A processing apparatus for a waste liquid crystal display device, comprising: a fluidized bed divided into two cells by a partition plate; heating medium particles circulating through the two cells; A processing device for a waste liquid crystal display device, wherein the flow rate can be changed.
【請求項5】請求項4において、前記流動層の二つのセ
ルのうちで流動化用ガスの流速が遅い方のセルから前記
ガラス基板が回収されるように前記ガラス回収器を備え
たことを特徴とする廃液晶表示装置の処理装置。
5. The apparatus according to claim 4, wherein the glass recovery device is provided so that the glass substrate is recovered from a cell having a lower fluidizing gas flow velocity among the two cells of the fluidized bed. Characteristic waste liquid crystal display device processing equipment.
JP32334699A 1999-11-12 1999-11-12 Processing method and processing apparatus for waste liquid crystal display device Expired - Fee Related JP3638836B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32334699A JP3638836B2 (en) 1999-11-12 1999-11-12 Processing method and processing apparatus for waste liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32334699A JP3638836B2 (en) 1999-11-12 1999-11-12 Processing method and processing apparatus for waste liquid crystal display device

Publications (2)

Publication Number Publication Date
JP2001137804A true JP2001137804A (en) 2001-05-22
JP3638836B2 JP3638836B2 (en) 2005-04-13

Family

ID=18153779

Family Applications (1)

Application Number Title Priority Date Filing Date
JP32334699A Expired - Fee Related JP3638836B2 (en) 1999-11-12 1999-11-12 Processing method and processing apparatus for waste liquid crystal display device

Country Status (1)

Country Link
JP (1) JP3638836B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002096577A1 (en) * 2001-05-29 2002-12-05 Densho Engineering Co.,Ltd Method of collecting glass by reducing environmental load from lcd
JP2007125459A (en) * 2005-11-01 2007-05-24 Sharp Corp Treatment method and treatment apparatus of liquid crystal panel
CN100392477C (en) * 2006-07-07 2008-06-04 南京大学 Liquid crystal display panel resource processing method
JP2010022966A (en) * 2008-07-22 2010-02-04 Taiyo Nippon Sanso Corp Treatment method and treatment apparatus for liquid crystal panel
CN105080938A (en) * 2015-09-02 2015-11-25 扬州宁达贵金属有限公司 Method for recycling indium, glass and polaroid from waste liquid crystal display screen
CN105063364B (en) * 2015-09-02 2020-01-07 扬州宁达贵金属有限公司 Method for recovering indium from waste liquid crystal display screen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109174913B (en) * 2018-09-10 2021-09-14 徐州菲宁环保科技有限公司 Dry recovery method for valuable components in waste color filters

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002096577A1 (en) * 2001-05-29 2002-12-05 Densho Engineering Co.,Ltd Method of collecting glass by reducing environmental load from lcd
JP2007125459A (en) * 2005-11-01 2007-05-24 Sharp Corp Treatment method and treatment apparatus of liquid crystal panel
JP4651506B2 (en) * 2005-11-01 2011-03-16 シャープ株式会社 Liquid crystal panel processing method and processing apparatus
CN100392477C (en) * 2006-07-07 2008-06-04 南京大学 Liquid crystal display panel resource processing method
JP2010022966A (en) * 2008-07-22 2010-02-04 Taiyo Nippon Sanso Corp Treatment method and treatment apparatus for liquid crystal panel
CN105080938A (en) * 2015-09-02 2015-11-25 扬州宁达贵金属有限公司 Method for recycling indium, glass and polaroid from waste liquid crystal display screen
CN105063364B (en) * 2015-09-02 2020-01-07 扬州宁达贵金属有限公司 Method for recovering indium from waste liquid crystal display screen
CN105080938B (en) * 2015-09-02 2021-03-02 扬州宁达贵金属有限公司 Method for comprehensively recovering indium, glass and polaroid from waste liquid crystal display screen

Also Published As

Publication number Publication date
JP3638836B2 (en) 2005-04-13

Similar Documents

Publication Publication Date Title
US5607496A (en) Removal of mercury from a combustion gas stream and apparatus
JP2001137804A (en) Method for treating waste liquid crystal display device and treating device for the same
KR20140017082A (en) Method for recovering kish graphite using byproducts of steelmaking and method for preparing graphene or graphene-like graphite platelet from the kish graphite
SE1150277A1 (en) Process and system for producing silicon and silicon carbide
JP3985052B2 (en) Waste treatment method in gasification reforming system
WO2004081243A1 (en) Method for recovering platinum group element
JPH06200267A (en) Method for reducing sulfur and ash content of coal
US6479025B2 (en) Process for the production of sodium carbonate
US6336958B2 (en) Method for purifying gas loaded with dust
JP3908325B2 (en) Recovery method for sublimable substances
JP4984123B2 (en) Method for recovering gold or platinum group elements from SiC-based materials
EP0466803B1 (en) Method for cleaning flue gas formed on refuse incineration
JPS63502602A (en) Fluidized bed method
JPH11235515A (en) Method of thermally regenerating spent acid
JP2004076090A (en) Apparatus and method for recovering low-melting point valuable sources
JP2000051829A (en) Method and apparatus for recycling treatment of waste liquid crystal display apparatus and method for separating organic film in fluidized-bed
US6241806B1 (en) Recovering vanadium from petroleum coke as dust
JP3843075B2 (en) Dry recovery of platinum group elements
JPH11293352A (en) Recovery of metal by reducing-separation of metal source containing plural kinds of metal oxides, and apparatus therefor
JPS6148408A (en) Recovering or purifying method of selenium
JP2004230229A (en) Treatment process and treatment apparatus for waste liquid-crystal panel
JP3469153B2 (en) Exhaust gas treatment equipment
JPH05343107A (en) Method for disposing of lead-acid battery
JP2003096523A (en) Method for treating residual ash of aluminum
JP2004081990A (en) Agent and equipment for removing toxic substance in combustion exhaust gas

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20040924

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20041005

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20041203

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: 20041228

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20050112

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees