JPH01171685A - Treatment of waste containing asbestos - Google Patents
Treatment of waste containing asbestosInfo
- Publication number
- JPH01171685A JPH01171685A JP62328463A JP32846387A JPH01171685A JP H01171685 A JPH01171685 A JP H01171685A JP 62328463 A JP62328463 A JP 62328463A JP 32846387 A JP32846387 A JP 32846387A JP H01171685 A JPH01171685 A JP H01171685A
- Authority
- JP
- Japan
- Prior art keywords
- asbestos
- waste
- containing waste
- cylinder
- treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010425 asbestos Substances 0.000 title claims abstract description 58
- 229910052895 riebeckite Inorganic materials 0.000 title claims abstract description 58
- 239000002699 waste material Substances 0.000 title claims abstract description 43
- 239000003513 alkali Substances 0.000 claims abstract description 13
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- -1 silicate compound Chemical class 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract description 15
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 abstract description 6
- 239000004568 cement Substances 0.000 abstract description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 abstract description 4
- 239000000920 calcium hydroxide Substances 0.000 abstract description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 239000010454 slate Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 13
- 239000002585 base Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 210000004907 gland Anatomy 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 150000004760 silicates Chemical class 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
- 238000002203 pretreatment Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000010335 hydrothermal treatment Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 description 1
- 229910001863 barium hydroxide Inorganic materials 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 229910052620 chrysotile Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- UUCCCPNEFXQJEL-UHFFFAOYSA-L strontium dihydroxide Chemical compound [OH-].[OH-].[Sr+2] UUCCCPNEFXQJEL-UHFFFAOYSA-L 0.000 description 1
- 229910001866 strontium hydroxide Inorganic materials 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- CWBIFDGMOSWLRQ-UHFFFAOYSA-N trimagnesium;hydroxy(trioxido)silane;hydrate Chemical compound O.[Mg+2].[Mg+2].[Mg+2].O[Si]([O-])([O-])[O-].O[Si]([O-])([O-])[O-] CWBIFDGMOSWLRQ-UHFFFAOYSA-N 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は石綿含有廃棄物を処理する方法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a method for treating asbestos-containing waste.
［従来の技術］
近年、一般のビルディングで断熱用等に多用されてきた
建材中の石綿による環境汚染がクローズアップされ、既
施工建材の剥離回収処理が急速に展開されているが、回
収した含石綿建材廃棄物の固定化処理は、一部業者が暫
定的にセメント固化しているのを除いて、大勢としては
、剥離作業時に液体状の有機又は無機系の処理剤を塗布
又は含浸し石綿の大量飛散を抑止する程度で、有効な固
定化処理は未だ全く手がつけられていないのが現状であ
る。[Prior art] In recent years, environmental pollution caused by asbestos in building materials, which are often used for insulation in general buildings, has been brought into focus, and stripping and recovery treatment of already constructed building materials has been rapidly developed. For immobilization of asbestos building material waste, most companies apply or impregnate asbestos with a liquid organic or inorganic treatment agent during stripping work, with the exception of some companies who temporarily solidify the asbestos with cement. At present, no effective immobilization treatment has yet been developed that can prevent large quantities of particles from scattering.
［発明が解決しようとする問題点］
セメントによる石綿含有廃棄物の固化方法では、固化体
の容積が大きく、嵩ぼるという問題のほか、この固化体
の耐水性、耐火性、耐久性が高くないという問題があっ
た。また、石綿の浸出のおそれもある。さらに処理コス
トもかなり高いものとなっていた。[Problems to be solved by the invention] In the method of solidifying asbestos-containing waste using cement, there is a problem that the volume of the solidified body is large and bulky, and the solidified body does not have high water resistance, fire resistance, or durability. There was a problem. There is also a risk of asbestos leaching. Furthermore, processing costs were also quite high.
石綿は無機物質で長期安定性を有しているので、上記の
問題点のない処理方法の開発が期待されている。Since asbestos is an inorganic substance and has long-term stability, it is hoped that a treatment method that does not have the above-mentioned problems will be developed.
［問題を解決するための手段］
本発明の石綿含有廃棄物の処理方法は、石綿含有廃棄物
にアルカリ、水及びケイ酸塩化合物の少なくとも１種を
加え、１５０〜３５０’ｅ及び２００〜３００ Ｋ ｇ
／ ｃ ｍ” Ｇ程度で水熱反応させ、石綿を非針状
化させるか又は固化させることを特徴とするものである
。[Means for solving the problem] The method for treating asbestos-containing waste of the present invention includes adding at least one of an alkali, water, and a silicate compound to the asbestos-containing waste, and K g
/cm''G is caused to undergo a hydrothermal reaction to make asbestos nonacicular or solidify it.
以下、本発明についてさらに詳細に説明する。The present invention will be explained in more detail below.
本発明において、石綿含有廃棄物としては、石綿セメン
ト板、石綿石膏板等の石綿系ボード類、石綿セメント吹
付物、石綿製耐熱製品、石綿製絶縁製品など各種の石綿
含有物の廃棄物があげられる。In the present invention, asbestos-containing waste includes various asbestos-containing wastes such as asbestos-based boards such as asbestos-cement boards and asbestos-gypsum boards, asbestos-cement sprayed products, asbestos heat-resistant products, and asbestos insulation products. It will be done.
この石綿含有廃棄物に加えるアルカリとしては、水酸化
ナトリウム、水酸化カリウム、水酸化カルシウム、水酸
化バリウム、水酸化ストロンチウム、リン酸ナトリウム
等の１種又は２種以上が挙げられるが、コストの面から
水酸化ナトリウム、水酸化カルシウムが好適である。ま
た、ケイ酸塩化合物としてはソーダガラス、シラス、ホ
ウケイ酸ガラス等が挙げられる。Examples of the alkali added to this asbestos-containing waste include one or more of sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, strontium hydroxide, and sodium phosphate; Sodium hydroxide and calcium hydroxide are preferred. In addition, examples of the silicate compound include soda glass, shirasu, borosilicate glass, and the like.
これらのアルカリ、ケイ酸塩化合物及び水の１種又は２
種以上が石綿含有廃棄物に加えられる。One or two of these alkalis, silicate compounds and water
seeds or more are added to asbestos-containing waste.
添加量は、石綿含有廃棄物中の石綿１００重量部に対し
、
アルカリ：１〜５重量部、
水：５〜２０重量部、
ケイ酸塩化合物＝１〜３０重量部
となるようにするのが好適である。The amounts to be added are as follows: alkali: 1 to 5 parts by weight, water: 5 to 20 parts by weight, and silicate compound = 1 to 30 parts by weight, per 100 parts by weight of asbestos in the asbestos-containing waste. suitable.
本発明では、この石綿含有廃棄物にアルカリ、休及びケ
イ酸塩化合物の１種又は２種以上を加えるのであるが、
この添加に先立って前処理を行うことにより石綿含有廃
棄物中の石綿の含有率を高めるようにしても良い。この
前処理法としては、該廃棄物が可燃物質や熱分解性物質
を含む場合にはこれを加熱する方法が挙げられる。また
、該廃棄物が酸やアルカリ、あるいは有機溶媒等に可溶
ないしそれらにより分解する性質のものである場合には
、それらにより溶解ないし分解する方法が挙げられる。In the present invention, one or more of alkali, alkali and silicate compounds are added to this asbestos-containing waste.
Prior to this addition, the content of asbestos in the asbestos-containing waste may be increased by performing pretreatment. As this pretreatment method, when the waste contains combustible substances or thermally decomposable substances, a method of heating the waste may be mentioned. In addition, when the waste is soluble in or decomposed by acids, alkalis, or organic solvents, a method of dissolving or decomposing by them can be mentioned.
なお、アルカリ、水、ケイ酸塩化合物の添加あるいは上
記前処理として１石綿含有廃棄物を所要の粒度に解砕し
たり、粗大な金属片を取り除いたりする等の通常の廃棄
物処理の予備処理を必要に応じ行う。In addition, the addition of alkali, water, silicate compounds, or the above-mentioned pretreatments include crushing asbestos-containing waste to the required particle size, removing coarse metal pieces, and other pretreatments for normal waste treatment. Perform as necessary.
石綿含有廃棄物にアルカリ、水、ケイ酸塩化合物の１種
又は２種以上を加えて混合した後、１５０〜３５０℃及
び１００〜３５０Ｋｇ／ｃ ｒｎ’ Ｇ程度で水熱反応
を行う。After adding and mixing one or more of alkali, water, and silicate compounds to asbestos-containing waste, a hydrothermal reaction is performed at 150 to 350°C and about 100 to 350 kg/crn'G.
この水熱反応を行うことにより、石綿含有廃棄物が非針
状化したりあるいは固化する。即ち、水熱条件化で石綿
繊維が溶解・析出しく水熱固化）、原鉱石であるクリソ
タイル（Ｍｇａ（Ｓ ｉ＋ ０ＩＩ）（ＯＨ）ｓ ・Ｈ
２０，蛇紋岩の１一種）、角閃石様とは異質であり均質
で安定（圧縮強度 ２０ＭＰａ以上）な岩石状固化体を
形成する。By performing this hydrothermal reaction, the asbestos-containing waste becomes non-acicular or solidified. In other words, asbestos fibers dissolve and precipitate under hydrothermal conditions (hydrothermal solidification), the raw ore chrysotile (Mga(S i+ 0II) (OH)s ・H
20, a type of serpentinite), which is different from amphibole-like and forms a homogeneous and stable rock-like solidified body (compressive strength of 20 MPa or more).
また、この石綿の水熱固化プロセスにおいては、石綿の
短繊維の針状結晶部が選択的に溶解し針状構造が消滅す
るために、発ガン性等の人体への有害性が解消できる。In addition, in this hydrothermal solidification process of asbestos, the needle-like crystal parts of the asbestos short fibers are selectively dissolved and the needle-like structure disappears, so that carcinogenicity and other harmful effects on the human body can be eliminated.
この水熱反応時間は、通常の場合、１０分〜数時間程度
である。この処理により得られる固化体又は非針状化物
は、そのままもしくはドラム缶等の適宜の容器に入れて
廃棄ないし保管することができる。This hydrothermal reaction time is usually about 10 minutes to several hours. The solidified material or non-acicular material obtained by this treatment can be disposed of or stored as is or in a suitable container such as a drum can.
この水熱反応を行うのに好適な装置を第１図に示す。符
号１はシリンダであり、その外周に電気ヒータ２が設け
られている。シリンダ２の両開口からピストン３．４が
挿入され、グランドパツキン５．６を介してピストンロ
ッド７．８がピストン３．４を押圧可能に連設されてい
る。符号９は石綿含有廃棄物と上記アルカリ、水、ケイ
酸塩化合物との混合物を示す。A suitable apparatus for carrying out this hydrothermal reaction is shown in FIG. Reference numeral 1 indicates a cylinder, and an electric heater 2 is provided on the outer periphery of the cylinder. A piston 3.4 is inserted through both openings of the cylinder 2, and a piston rod 7.8 is connected to the piston 3.4 via a gland packing 5.6 so as to be able to press the piston 3.4. Reference numeral 9 indicates a mixture of asbestos-containing waste and the alkali, water, and silicate compound.
まず、上部ピストン３を抜いておき、シリンダ１内に上
記混合物９を所定量充填する。この際、必要に応じ混合
物をある程度充填した時に上部ピストン３で仮押して減
容し、その後残余の混合物を充填する。この後、上部ピ
ストン３をピストンロッド７を介して、水圧又は油圧装
置（図示路）で押し下げ、１例として１００〜３５０Ｋ
ｇ／ｃ ｍ’ Ｇ程度に加圧する。同時にシリンダ１外
に設置した電気ヒータ２に通電し、シリンダ壁を１例と
して２００〜３５０℃に昇温する。この状態を数１０分
間保持して、シリンダ内の物質を水熱条件に維持する。First, the upper piston 3 is removed, and a predetermined amount of the mixture 9 is filled into the cylinder 1. At this time, if necessary, when a certain amount of the mixture is filled, the upper piston 3 is temporarily pressed to reduce the volume, and then the remaining mixture is filled. After this, the upper piston 3 is pushed down via the piston rod 7 by water pressure or a hydraulic device (the path shown), for example, 100 to 350K.
Pressurize to approximately g/cm'G. At the same time, an electric heater 2 installed outside the cylinder 1 is energized to raise the temperature of the cylinder wall to, for example, 200 to 350°C. This state is maintained for several tens of minutes to maintain the material within the cylinder in hydrothermal conditions.
なお、昇温に伴ない発生する水蒸気は、上下のグランド
パツキン４でシールし、シリンダ外への漏洩を防止する
。水熱反応後、電気ヒータ２を切ってシリンダ１を放冷
する。常温程度に冷却後、加圧を解除し、上部又は下部
のピストン７．８で固化したシリンダ内物質を抜きとり
回収する。The water vapor generated as the temperature rises is sealed by the upper and lower gland packings 4 to prevent it from leaking out of the cylinder. After the hydrothermal reaction, the electric heater 2 is turned off and the cylinder 1 is allowed to cool. After cooling to about room temperature, the pressurization is released, and the solidified substance inside the cylinder is extracted and collected using the upper or lower piston 7.8.
第２図は第１図に示した反応装置を組み込んだ処理装置
による処理手順の側面図及び模式的フローチャートであ
る。FIG. 2 is a side view and a schematic flowchart of a processing procedure using a processing apparatus incorporating the reaction apparatus shown in FIG.
第２図において、シリンダ１はベースフレーム１０上の
ベースプレート１０ａ上に筒軸方向を上下方向にして設
置され、該シリンダ１を跨ぐようにフレーム１１が該ベ
ースフレーム１０に固設されている。このフレーム１１
には加圧機１２が設けられ、上部ピストンロッド７を押
圧可能とじている。符号１３は廃棄物ホッパ、１４は添
加剤（アルカリ、水、ケイ酸塩化合物）のタンクであり
、それぞれ粉砕混合機１５に配管にて接続されている。In FIG. 2, the cylinder 1 is installed on a base plate 10a on a base frame 10 with the cylinder axis direction being vertical, and a frame 11 is fixed to the base frame 10 so as to straddle the cylinder 1. This frame 11
A pressurizing machine 12 is provided at , and the upper piston rod 7 is pressably closed. Reference numeral 13 is a waste hopper, and 14 is a tank for additives (alkali, water, silicate compounds), each of which is connected to the grinding mixer 15 via piping.
第２図の装置において、石綿含有廃棄物はシリンダ１よ
り上方に設置する混合機１５において、予め所定量の添
加剤と混合調整された後、配管により自然流下又は適当
な供給装置（図示略）によってシリンダ１内に充填され
る。その後、上記と同様にして固化処理が行なわれ、取
り出された固化体１６はドラム缶１７に詰められ、次工
程へ送られる。この第２図の装置は石綿含有廃棄物が粉
状又は粉状に近い場合に採用される。石綿含有廃棄物が
織布状又は塊状等、非粉体状である場合には、手操作又
は適当な搬送機（コンベア等）によって石綿含有廃棄物
あるいは石綿含有廃棄物と添加物との混合物を混合機１
５やシリンダ１内に供給すれば良い。In the apparatus shown in FIG. 2, asbestos-containing waste is mixed with a predetermined amount of additive in advance in a mixer 15 installed above the cylinder 1, and then allowed to flow by gravity through piping or by a suitable supply device (not shown). The cylinder 1 is filled with the following. Thereafter, a solidification process is performed in the same manner as described above, and the solidified material 16 taken out is packed into a drum can 17 and sent to the next process. The apparatus shown in FIG. 2 is employed when asbestos-containing waste is powdery or nearly powdery. If the asbestos-containing waste is in non-powder form, such as in the form of woven fabric or lumps, the asbestos-containing waste or a mixture of asbestos-containing waste and additives is transported manually or by an appropriate conveyor (conveyor, etc.). Mixer 1
5 or into the cylinder 1.
第３図は本発明にて大容量処理を実施するための大型水
熱固化装置の縦断面図であり、シリンダ１の内径は例え
ば１８０ｍｍとされている。FIG. 3 is a longitudinal sectional view of a large-scale hydrothermal solidification apparatus for carrying out large-capacity treatment according to the present invention, and the inner diameter of the cylinder 1 is, for example, 180 mm.
このシリンダ１は、ベースフレーム１０上のベースプレ
ート１０ａ上に立設され、下部から突設されたフランジ
１ａがボルト２０及びナツト２１によりベースプレート
１０ａに固定されている。シリンダ１内の下部には下部
ピストン４が挿入され、下部グランドパツキン６を介し
て下部ピストン押え２２に連結されている。該下部ピス
トン押え２２はベースプレート１０ａに当接している。This cylinder 1 is erected on a base plate 10a on a base frame 10, and a flange 1a protruding from the bottom is fixed to the base plate 10a with bolts 20 and nuts 21. A lower piston 4 is inserted into the lower part of the cylinder 1 and connected to a lower piston holder 22 via a lower gland packing 6. The lower piston holder 22 is in contact with the base plate 10a.
シリンダ１内の上部にはスペーサ２３を介して被処理混
合物９を押えるように上部ピストン３が配置されている
。該上部ピストン３は上部グランドパツキン５を介して
上部ピストン押え２４に連結されている。符号２５．２
６はこの連結を行なっているボルト及びナツトを示す。An upper piston 3 is disposed in the upper part of the cylinder 1 so as to press down the mixture 9 to be treated with a spacer 23 in between. The upper piston 3 is connected to an upper piston retainer 24 via an upper gland packing 5. Code 25.2
6 indicates the bolts and nuts that make this connection.
上部ピストン押え２４の上端にはピストン口うドアが連
結されている。A piston opening door is connected to the upper end of the upper piston holder 24.
なお、図示は省略されているが、シリンダ１の外周には
電気ヒータが設けられシリンダ１を加熱可能としている
。シリンダ１には、温度検出用センサ（例えば熱電対）
を差し込むための凹穴２７が設けられている。Although not shown in the drawings, an electric heater is provided on the outer periphery of the cylinder 1 so that the cylinder 1 can be heated. Cylinder 1 has a temperature detection sensor (e.g. thermocouple)
A recessed hole 27 is provided for insertion.
前記スペーサ２３に当接する上部ピストン３の下端外周
は段状に切り欠かれた形状となっており、空隙２８が周
設されている。また、上部ピストン押え２４には上下方
向に貫通する貫通孔２９が穿設され、該貫通孔２９の上
端はキャップ３０が螺合することにより封じられている
。該貫通孔２９の下部と前記空隙２８とを連通ずる連通
孔３１が上部ピストン３に穿設されている。The outer periphery of the lower end of the upper piston 3 that contacts the spacer 23 has a step-like notched shape, and a gap 28 is provided around the periphery. Further, the upper piston holder 24 is provided with a through hole 29 that penetrates in the vertical direction, and the upper end of the through hole 29 is sealed by a cap 30 screwed into the upper end. A communication hole 31 is provided in the upper piston 3 to communicate the lower part of the through hole 29 with the space 28 .
該貫通孔２９を上部ピストン２４の外周空間３２に連通
ずるための開口３３が該上部ピストン押え２４に穿設さ
れている。シリンダ１の上端には端板３４が装着され該
外周空間３２を対画しており、該端板３４に穿設された
開口３５に排気ノズル３６が接続されている。An opening 33 for communicating the through hole 29 with the outer circumferential space 32 of the upper piston 24 is bored in the upper piston holder 24 . An end plate 34 is attached to the upper end of the cylinder 1 to define the outer peripheral space 32, and an exhaust nozzle 36 is connected to an opening 35 formed in the end plate 34.
シリンダ１の中程の高さには、貫通孔３７が穿設され、
空隙２８に連通している。該貫通孔３７には排気ノズル
３８が連設されている。符号３９はシリンダの懸吊用フ
ックを示す。A through hole 37 is bored at the middle height of the cylinder 1,
It communicates with the void 28. An exhaust nozzle 38 is connected to the through hole 37 . Reference numeral 39 indicates a hook for hanging the cylinder.
この第３図の装置によれば、内部に装填された混合物９
を水熱処理するに先立って、前処理として、該混合物９
を加熱し熱分解又は燃焼分解を行うことにより該混合物
９の石綿含有率を高めることができる。この分解反応に
より生じるガスは、スペーサ２３の外周を通過して空隙
２９から排気ノズル３８により、もしくは、さらに連通
孔３１．２９、開口３３を通って外周空間３２から排気
ノズル３６により排出される。なお、排気ノズル３６．
３８は図示しない排気装置に接続されている。According to the device of FIG. 3, the mixture 9 loaded inside
Prior to hydrothermal treatment, the mixture 9 is pretreated as a pretreatment.
The asbestos content of the mixture 9 can be increased by heating and performing thermal decomposition or combustion decomposition. The gas generated by this decomposition reaction passes through the outer periphery of the spacer 23 and is exhausted from the gap 29 by the exhaust nozzle 38, or further passes through the communication hole 31.29 and the opening 33 and is exhausted from the outer peripheral space 32 by the exhaust nozzle 36. Note that the exhaust nozzle 36.
38 is connected to an exhaust device (not shown).
［実施例］ 以下、具体的な実施例について説明する。[Example] Hereinafter, specific examples will be described.
実施例１
第３図に示す装置を用いて石綿含有廃棄物の固化処理を
行フた。主な条件を次に示す。Example 1 Asbestos-containing waste was solidified using the apparatus shown in FIG. The main conditions are shown below.
シリンダ１の内径 ！８０ｍｍ 混合物９の量 １５Ｋｇ 前処理温度 ３００℃ 前処理時ピストン圧力 大気圧 水熱反応温度 ３００℃ 水熱反応時間 ６０ｍ１ ｎ 混合物９の内訳は次の通りである。Inner diameter of cylinder 1! 80mm Amount of mixture 9: 15Kg Pretreatment temperature 300℃ Piston pressure during pretreatment Atmospheric pressure Hydrothermal reaction temperature 300℃ Hydrothermal reaction time 60m1n The details of mixture 9 are as follows.
石綿含有廃棄物はアスベストである。この石綿含有廃棄
物１３．５Ｋｇに水酸化ナトリウム水溶液（濃度約２０
ｗｔ％）１．５Ｋｇを加えである。Asbestos-containing waste is asbestos. Add 13.5 kg of this asbestos-containing waste to a sodium hydroxide aqueous solution (concentration approximately 20 kg).
wt%) 1.5Kg was added.
上記の条件で水熱反応を行なわせることにより、直径１
８ｃｍ、高さ３０ｃｍの固化体が形成された。該固化体
の強度（高さ方向の圧縮強度）は２０ＭＰａであった。By carrying out the hydrothermal reaction under the above conditions, a diameter of 1
A solidified body of 8 cm and 30 cm in height was formed. The strength of the solidified body (compressive strength in the height direction) was 20 MPa.
なお、この固化体を顕微鏡観察したところ、石綿の針状
結晶は見当らなかった。When this solidified material was observed under a microscope, no needle-like asbestos crystals were found.
実施例２
石綿含有廃棄物として含水アスベスト１３．５Ｋｇに水
酸化カルシウム１．５Ｋｇのみを加え水を加えない混合
物を実施例１と同様にして水熱処理した。その結果、強
度２０ＭＰａの固化体が得られた。Example 2 As asbestos-containing waste, a mixture of 13.5 kg of hydrated asbestos and 1.5 kg of calcium hydroxide without adding water was hydrothermally treated in the same manner as in Example 1. As a result, a solidified body with a strength of 20 MPa was obtained.
実施例３
石綿含有廃棄物としてアスベスト９．０Ｋｇにケイ酸塩
化合物としてソーダガラス４．５Ｋｇ。Example 3 9.0 kg of asbestos was used as asbestos-containing waste and 4.5 kg of soda glass was used as a silicate compound.
水酸化ナトリウム水溶液（約２０ｗｔ％）１．５Ｋｇを
加え、実施例１と同様にして水熱処理した。その結果、
強度３０ＭＰａの固化体が得られた。1.5 kg of sodium hydroxide aqueous solution (approximately 20 wt%) was added, and hydrothermal treatment was carried out in the same manner as in Example 1. the result,
A solidified body with a strength of 30 MPa was obtained.
なお、実施例２．３の固化体を顕微鏡観察したところ、
いずれも石綿の針状結晶は見当らなかった。In addition, when the solidified material of Example 2.3 was observed under a microscope,
No needle-shaped asbestos crystals were found in either case.
［効果］
以上の実施例からも明らかな通り、本発明によれば石綿
含有廃棄物の固化ないしは針状結晶の解消をなすことが
できる。本発明によれば石綿含有廃棄物の減容もでき、
埋設、投棄、保管等の処理を容易に行なえる。[Effect] As is clear from the above examples, according to the present invention, it is possible to eliminate the solidification or needle-like crystals of asbestos-containing waste. According to the present invention, it is also possible to reduce the volume of asbestos-containing waste,
It can be easily buried, dumped, stored, etc.
第１図、第２図及び第３図は本発明方法を実施するため
の装置を示し、第１図及び第３図は断面図、第２図は側
面図である。
１・・・シリンダ、 ２・・・ヒータ、３．４・
・・ピストン、 ９・・・被処理混合物。
代 理 人 弁理士 重 野 剛第３
図1, 2 and 3 show an apparatus for carrying out the method of the invention, FIGS. 1 and 3 being sectional views and FIG. 2 being a side view. 1...Cylinder, 2...Heater, 3.4.
...Piston, 9...Mixture to be treated. Agent: Patent Attorney Tsuyoshi Shigeno 3rd
figure
Claims (2)
物の少なくとも１種を加え、１５０〜３５０℃で水熱反
応させ、石綿を非針状化させるか又は固化させることを
特徴とする石綿含有廃棄物の処理方法。(1) Asbestos characterized by adding at least one of alkali, water and a silicate compound to asbestos-containing waste and causing a hydrothermal reaction at 150 to 350°C to make asbestos non-acicular or solidify it. How to dispose of contained waste.
石綿含有率を高めるか又は微粒化した後、アルカリ、水
及びガラスの少なくとも１種を加えることを特徴とする
特許請求の範囲第１項に記載の石綿含有廃棄物の処理方
法。(2) A patent claim characterized in that after pre-treating asbestos-containing waste and decomposing the processing agent to increase the asbestos content or atomize it, at least one of alkali, water and glass is added. A method for treating asbestos-containing waste according to scope 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62328463A JPH01171685A (en) | 1987-12-25 | 1987-12-25 | Treatment of waste containing asbestos |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62328463A JPH01171685A (en) | 1987-12-25 | 1987-12-25 | Treatment of waste containing asbestos |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01171685A true JPH01171685A (en) | 1989-07-06 |
| JPH0436753B2 JPH0436753B2 (en) | 1992-06-17 |
Family
ID=18210548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62328463A Granted JPH01171685A (en) | 1987-12-25 | 1987-12-25 | Treatment of waste containing asbestos |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01171685A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0568367A2 (en) * | 1992-05-01 | 1993-11-03 | The Dow Chemical Company | Process for treating wastes of asbestos |
| WO1994008661A1 (en) * | 1992-10-08 | 1994-04-28 | Cross-Link Technology | Product and method for treating asbestos |
| WO1997000099A1 (en) * | 1995-06-16 | 1997-01-03 | Debailleul Gerard | Method and plant for processing asbestos-containing waste |
| WO2006047070A1 (en) * | 2004-10-22 | 2006-05-04 | Studsvik, Inc. | In-container mineralization |
| JP2007296411A (en) * | 2006-02-23 | 2007-11-15 | Japan Fine Ceramics Center | Treating method of asbestos, recycling material derived from asbestos and manufacturing method thereof |
| US7531152B2 (en) | 2000-10-19 | 2009-05-12 | Studsvik, Inc. | Mineralization of alkali metals, sulfur, and halogens |
| JP2009112899A (en) * | 2007-11-02 | 2009-05-28 | Japan Fine Ceramics Center | Method of treating material that contains asbestos |
| JP2009240953A (en) * | 2008-03-31 | 2009-10-22 | Chutoku Kenki Kk | Method and device for treating asbestos |
| US10593437B2 (en) | 2015-01-30 | 2020-03-17 | Studsvik, Inc. | Methods for treatment of radioactive organic waste |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007032412A1 (en) * | 2005-09-13 | 2007-03-22 | The Institute For Eco & Economy System Corporation | Hydrothermally solidified material by zero emission-type thermal power system, and process for producing the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62237984A (en) * | 1986-04-08 | 1987-10-17 | Meisei Kogyo Kk | Waste materials treatment for asbestos-containing substance |
-
1987
- 1987-12-25 JP JP62328463A patent/JPH01171685A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62237984A (en) * | 1986-04-08 | 1987-10-17 | Meisei Kogyo Kk | Waste materials treatment for asbestos-containing substance |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0568367A3 (en) * | 1992-05-01 | 1994-12-28 | Dow Chemical Co | Process for treating wastes of asbestos. |
| EP0568367A2 (en) * | 1992-05-01 | 1993-11-03 | The Dow Chemical Company | Process for treating wastes of asbestos |
| WO1994008661A1 (en) * | 1992-10-08 | 1994-04-28 | Cross-Link Technology | Product and method for treating asbestos |
| WO1997000099A1 (en) * | 1995-06-16 | 1997-01-03 | Debailleul Gerard | Method and plant for processing asbestos-containing waste |
| US6391271B1 (en) | 1995-06-16 | 2002-05-21 | DEBAILLEUL GéRARD JEAN-MARIE | Process for the treatment of waste containing asbestos |
| US7476194B2 (en) | 1999-10-20 | 2009-01-13 | Studsvik, Inc. | In-container mineralization |
| US7531152B2 (en) | 2000-10-19 | 2009-05-12 | Studsvik, Inc. | Mineralization of alkali metals, sulfur, and halogens |
| WO2006047070A1 (en) * | 2004-10-22 | 2006-05-04 | Studsvik, Inc. | In-container mineralization |
| JP2007296411A (en) * | 2006-02-23 | 2007-11-15 | Japan Fine Ceramics Center | Treating method of asbestos, recycling material derived from asbestos and manufacturing method thereof |
| JP2009112899A (en) * | 2007-11-02 | 2009-05-28 | Japan Fine Ceramics Center | Method of treating material that contains asbestos |
| JP2009240953A (en) * | 2008-03-31 | 2009-10-22 | Chutoku Kenki Kk | Method and device for treating asbestos |
| JP4568769B2 (en) * | 2008-03-31 | 2010-10-27 | 中特建機株式会社 | Asbestos treatment method and apparatus |
| US10593437B2 (en) | 2015-01-30 | 2020-03-17 | Studsvik, Inc. | Methods for treatment of radioactive organic waste |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0436753B2 (en) | 1992-06-17 |
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