JP2011218344A - Treatment method of waste materials - Google Patents

Treatment method of waste materials Download PDF

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JP2011218344A
JP2011218344A JP2010266737A JP2010266737A JP2011218344A JP 2011218344 A JP2011218344 A JP 2011218344A JP 2010266737 A JP2010266737 A JP 2010266737A JP 2010266737 A JP2010266737 A JP 2010266737A JP 2011218344 A JP2011218344 A JP 2011218344A
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reaction vessel
waste
superheated steam
chlorine
treatment
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JP6022745B2 (en
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Yasuyuki Ishida
泰之 石田
Tomofumi Kikuzaki
智文 菊崎
Hiroyuki Takano
博幸 高野
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Taiheiyo Cement Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/58—Construction or demolition [C&D] waste

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  • Processing Of Solid Wastes (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a treatment method of waste materials containing chlorine with an easy method.SOLUTION: In this waste material treatment method, waste materials containing chlorine is decomposed and desalinated, and then dried under a high temperature. Along with introducing the waste material into a reaction vessel, superheated steam is supplied and exhausted to the reaction vessel, and organic chlorine in the waste materials is thermally decomposed in the reaction vessel. Then the solid materials remaining in the reaction vessel is led to the outside of the reaction vessel as regenerated solid fuel.

Description

本発明は、塩素を含む廃棄物を処理する方法に関する。   The present invention relates to a method for treating waste containing chlorine.

生ゴミ、食品廃棄物、農業廃棄物、林産廃棄物等の有機性廃棄物を容器内に収容し、高温・高圧の水蒸気によって廃棄物を数十分間加熱（蒸煮）した後、容器内圧力を瞬間的に解放し、水の断熱膨張のエネルギーによって固体成分を粉砕（爆砕）する水蒸気爆砕（蒸煮爆砕）方式の廃棄物処理装置が知られている（特許文献１、特許文献２）。
しかしながら、これらの方法では、多大な熱量が必要であるとともに、廃棄物中の塩素が残留してしまい、固形燃料として使用するには適さない。 Organic waste such as garbage, food waste, agricultural waste, and forestry waste is stored in a container, and the waste is heated (steamed) for several tens of minutes with high-temperature and high-pressure steam, and then the pressure in the container There is known a steam explosion (steaming explosion) type waste treatment apparatus that instantaneously releases the water and crushes (explodes) a solid component with the energy of adiabatic expansion of water (Patent Document 1 and Patent Document 2).
However, these methods require a great amount of heat, and chlorine in the waste remains, which is not suitable for use as a solid fuel.

また、特許文献３には、有機性廃棄物を反応器内に導入し、２．３〜３．０ＭＰａの圧力を有する飽和水蒸気を供給して処理することにより、固形燃料を得る方法が記載されている。しかしながら、この処理方法においても、高圧・高温が必要となり、それに対応した装置が必要となる。また、この処理方法では、分解された塩素が無機塩類として表面水として残存するため、固液分離による脱塩及び乾燥工程が必要となり、工程も煩雑になってしまう。   Patent Document 3 describes a method for obtaining a solid fuel by introducing organic waste into a reactor and supplying a saturated steam having a pressure of 2.3 to 3.0 MPa for treatment. ing. However, this processing method also requires high pressure and high temperature, and an apparatus corresponding to it. Further, in this treatment method, decomposed chlorine remains as surface water as inorganic salts, so that a desalting and drying step by solid-liquid separation is necessary, and the steps become complicated.

特開２００３−４７４０９号公報JP 2003-47409 A 特開２００７−７５６５９号公報JP 2007-75659 A 特開２０１０−３７５３６号公報JP 2010-37536 A

従って、本発明の目的は、簡便な方法で、塩素を含有する廃棄物を処理する方法を提供することにある。   Accordingly, an object of the present invention is to provide a method for treating waste containing chlorine by a simple method.

本発明者らは、斯かる実情に鑑み、種々検討した結果、過熱水蒸気を用いれば、従来より少ないエネルギーで塩素を除去できることを見出し、本発明を完成した。   As a result of various investigations in view of such circumstances, the present inventors have found that chlorine can be removed with less energy than before by using superheated steam, and the present invention has been completed.

すなわち、本発明は、塩素を含む廃棄物を高温で分解脱塩し且つ乾燥する廃棄物の処理方法において、廃棄物を反応容器内に導入するとともに、過熱水蒸気を前記反応容器に供給・排出し、反応容器内で廃棄物中の有機塩素を熱分解した後、前記反応容器内に残留した固形分を再生固形燃料として反応容器外に導出することを特徴とする廃棄物の処理方法を提供するものである。   That is, the present invention provides a waste treatment method in which chlorine-containing waste is decomposed and desalted at high temperature and dried, and the waste is introduced into the reaction vessel and superheated steam is supplied to and discharged from the reaction vessel. The present invention provides a waste processing method characterized in that after organic chlorine in waste is thermally decomposed in a reaction vessel, solids remaining in the reaction vessel are led out of the reaction vessel as regenerated solid fuel. Is.

本発明によれば、従来より少ないエネルギーで塩素を含む廃棄物を分解し、塩素を除去することができ、常圧で連続処理することが可能である。また、乾燥工程を必要とせず、一工程で脱塩された固形燃料を得ることができ、プロセスを簡略化することができる。更に、粉砕性も良好である。   According to the present invention, waste containing chlorine can be decomposed with less energy than before, and chlorine can be removed, and continuous treatment at normal pressure is possible. In addition, a solid fuel desalted in one step can be obtained without requiring a drying step, and the process can be simplified. Furthermore, the grindability is also good.

実施例１において用いた過熱水蒸気装置の模式図を示す図である。It is a figure which shows the schematic diagram of the superheated steam apparatus used in Example 1. FIG. 試験例１において、処理物の総発熱量、塩素以外の化学成分の残存量を示す図である。In Experiment 1, it is a figure which shows the total calorific value of a processed material, and the residual amount of chemical components other than chlorine.

本発明で対象とする廃棄物は、塩素を含有するプラスチックを含むもので、例えば、医療ゴミ、廃プラ、建築廃棄物、廃自動車シュレッダーダスト、都市ゴミ等の廃棄物（これら廃棄物を加工したRPF（Refuse Paper ＆ Plastic Fuel）なども含む）である。
このような廃棄物を投入する反応容器の形状は特に限定されず、市販の様々な形状のものを用いることができる。例えば、バッチ式の反応容器のほか、連続的に処理する場合においては、コンベア型、ロータリーキルン型、多段型、ハドル型攪拌等の搬送機能のある反応容器が好ましい。 Wastes targeted by the present invention include chlorine-containing plastics. For example, wastes such as medical waste, waste plastic, building waste, waste car shredder dust, and municipal waste (processed these wastes) Including RPF (Refuse Paper & Plastic Fuel).
There is no particular limitation on the shape of the reaction vessel into which such waste is charged, and various commercially available shapes can be used. For example, in addition to a batch-type reaction vessel, in the case of continuous treatment, a reaction vessel having a conveying function such as a conveyor type, a rotary kiln type, a multistage type, a huddle type stirring is preferable.

過熱水蒸気は、飽和水蒸気を発生させた後、過熱装置により飽和水蒸気を二次加熱することにより過熱水蒸気とし、反応容器に供給・排出される。飽和水蒸気を発生させる装置は特に限定されず、市販の水管ボイラ、丸ボイラ等を使用することができる。また、セメント製造工程等で発生する廃熱を用いて発生させる廃熱ボイラを用いても良い。過熱装置は飽和水蒸気が通過する管を外部より加熱することにより過熱水蒸気を発生させる装置であり、熱源は特に限定されず、燃料バーナー、高周波加熱等を用いたり、セメント製造工程等で発生する廃熱を用いても良い。
過熱水蒸気の温度は２１０〜３５０℃、特に２３５〜３５０℃のものが、熱分解による脱塩が十分に達成されるので好ましい。
従来の熱分解では、３５０℃以上の温度での処理が必要であったため、多大なエネルギーが必要であったが、本発明においては、これより低い温度での処理により、塩素を含む廃棄物を分解し、塩素を除去することが可能である。 After the saturated steam is generated, the superheated steam is secondarily heated by the superheater to obtain superheated steam, which is supplied to and discharged from the reaction vessel. The apparatus for generating saturated water vapor is not particularly limited, and a commercially available water tube boiler, round boiler, or the like can be used. Further, a waste heat boiler that is generated by using waste heat generated in a cement manufacturing process or the like may be used. The superheater is a device that generates superheated steam by heating the pipe through which saturated steam passes from the outside. The heat source is not particularly limited, and waste generated by using a fuel burner, high-frequency heating, etc., or in cement manufacturing processes, etc. Heat may be used.
The temperature of superheated steam is 210 to 350 ° C., particularly 235 to 350 ° C., because desalting by thermal decomposition is sufficiently achieved.
In the conventional pyrolysis, a treatment at a temperature of 350 ° C. or more was required, so a great deal of energy was required. In the present invention, waste containing chlorine was treated by a treatment at a temperature lower than this. It is possible to decompose and remove chlorine.

過熱水蒸気を得るための飽和水蒸気の温度は、一般的な低圧ボイラの１００〜１３０℃程度が好ましく、二次加熱による過熱度は８０〜２５０Ｋが好ましい。本発明の処理において、水分を含む廃棄物を処理した場合は乾燥効果も得られるため、より多くの水分を廃棄物から過熱水蒸気に移行させるには、過熱度が高いほど好ましい。
なお、過熱度とは、飽和水蒸気を二次加熱して所定の過熱水蒸気の温度まで上昇させる温度上昇分を示す。 The temperature of saturated steam for obtaining superheated steam is preferably about 100 to 130 ° C. of a general low pressure boiler, and the degree of superheat by secondary heating is preferably 80 to 250K. In the treatment of the present invention, when a waste containing moisture is treated, a drying effect is also obtained. Therefore, in order to transfer more moisture from waste to superheated steam, it is preferable that the degree of superheat is high.
In addition, superheat degree shows the temperature rise part which carries out secondary heating of saturated water vapor | steam, and raises to the temperature of predetermined | prescribed superheated water vapor | steam.

上記のような過熱水蒸気は、市販の過熱水蒸気装置を用いて供給することができる。
反応容器内において、廃棄物を過熱水蒸気で処理する時間は、１０分以上、特に３０分以上、更に６０分以上であるのが好ましく、常圧で処理することができる。
用いる水蒸気の量は、反応槽の形状、充填率、処理する廃棄物の塩素含有量、含水率、性状等によって異なり、特に限定されないが、一例を挙げると、廃棄物１kg当り、１８０Ｌ／hr程度であるのが好ましい。 Such superheated steam can be supplied using a commercially available superheated steam apparatus.
In the reaction vessel, the time for treating the waste with superheated steam is preferably 10 minutes or more, particularly preferably 30 minutes or more, and more preferably 60 minutes or more, and the treatment can be performed at normal pressure.
The amount of water vapor used varies depending on the shape of the reaction tank, the filling rate, the chlorine content of the waste to be treated, the moisture content, the properties, etc., and is not particularly limited. For example, about 180 L / hr per kg of waste Is preferred.

過熱水蒸気による処理により、反応容器内で廃棄物中の有機塩素は熱分解される。
分解・気化された塩素は、過熱水蒸気とともに反応容器外に導出することができる。排出された塩素を含む過熱水蒸気は、凝縮及び凝縮水の廃水処理（中和処理）等の工程により、無害化される。 By the treatment with superheated steam, the organic chlorine in the waste is thermally decomposed in the reaction vessel.
The decomposed and vaporized chlorine can be led out of the reaction vessel together with superheated steam. The superheated steam containing the discharged chlorine is rendered harmless by processes such as condensation and waste water treatment (neutralization treatment) of the condensed water.

一方、反応容器内に残留した固形分は、容器外に導出され、再生固形燃料として使用される。
この固形分は、本発明で対象とする、医療ゴミ、廃プラ、建築廃棄物、廃自動車シュレッダーダスト、都市ゴミ、RPF等の場合、塩素濃度が０．３質量％程度まで低減され、そのまま、固形燃料として利用可能なものである。 On the other hand, the solid content remaining in the reaction vessel is led out of the vessel and used as a regenerated solid fuel.
This solid content, in the case of medical waste, waste plastic, building waste, waste car shredder dust, municipal waste, RPF, etc., targeted in the present invention, the chlorine concentration is reduced to about 0.3% by mass, as it is, It can be used as a solid fuel.

本発明のように過熱水蒸気による処理では、乾燥効果もあるため、従来のように乾燥工程を必要とせず、一工程で脱塩された固形燃料を製造することができる。固形燃料において、乾燥工程は重要であるが、この工程を特別に設けなくても乾燥された固形燃料が得られることは非常に有利である。
また、廃棄物に含まれていた塩素は十分に除去されつつ、燃料となり得る他の化学成分（炭素、水素等）は、ほとんど除去されていないので、固形燃料として用いた際の総発熱量も高いものである。 Since the treatment with superheated steam as in the present invention has a drying effect, a solid fuel desalted in one step can be produced without requiring a drying step as in the prior art. In the solid fuel, the drying step is important, but it is very advantageous to obtain a dried solid fuel without specially providing this step.
In addition, the chlorine contained in the waste is sufficiently removed, but other chemical components (carbon, hydrogen, etc.) that can become fuel are hardly removed, so the total calorific value when used as solid fuel is also It is expensive.

なお、処理する廃棄物によっては、過熱水蒸気による処理で、塩素が十分に除去されない場合もある。そのような場合や、より塩素の含有量を低くしたい場合には、過熱水蒸気処理後の固形分を水洗処理することにより、更に塩素を除去することができる。
水洗処理の際、固形分は、予め適当な粒径に粉砕しておくこともでき、粉砕には、ダブルロールクラッシャー、ハードクラッシャー、衝撃せん断ミル等の粉砕機を用いることができる。 Depending on the waste to be treated, chlorine may not be sufficiently removed by treatment with superheated steam. In such a case or when it is desired to further reduce the chlorine content, the chlorine can be further removed by washing the solid content after the superheated steam treatment.
In the water washing treatment, the solid content can be pulverized to an appropriate particle size in advance, and a pulverizer such as a double roll crusher, a hard crusher, or an impact shear mill can be used for the pulverization.

水洗処理の方法は、固形分と水を接触させる方法であれば特に制限されず、例えば、下部に金網、溝等の水抜き機構を有するピットに固形分の粉状体を堆積させ、その上部より水を散布する方法、攪拌機付きの洗浄槽内で固形分を水に懸濁させた後、濾過して水を除去する方法などが挙げられる。ここで、濾過は、フィルタープレス、遠心分離等により、行うことが好ましいが、灰押出し機や、積み付け時の自然流下による水切り程度でも良い。
用いる水の量は、固形分の重量に対して、１重量倍以上、特に５重量倍以上であるのが好ましい。
また、水洗処理に用いる水の温度は、３０℃以上であるのが好ましく、高温であるほど好ましい。 The method of washing with water is not particularly limited as long as it is a method of bringing solids into contact with water. For example, a solid powder is deposited in a pit having a draining mechanism such as a wire mesh or a groove at the bottom, and the upper part thereof. Examples include a method of spraying more water, a method of suspending solids in water in a washing tank equipped with a stirrer, and then removing water by filtration. Here, the filtration is preferably performed by a filter press, centrifugal separation, or the like, but may be an ash extruder or a water drainage by natural flow at the time of stacking.
The amount of water to be used is preferably at least 1 times by weight, particularly at least 5 times the weight of the solid content.
Moreover, it is preferable that the temperature of the water used for a water-washing process is 30 degreeC or more, and it is so preferable that it is high temperature.

本発明の処理により得られる固形分は、被粉砕性も良好なものである。
例えば、固形燃料をセメントキルンで好適に使用できる条件として、粒度が１．５mm以下の割合を９０％以上とするのが好ましいが、本発明の処理物は、このような粒度に粉砕することが可能である。 The solid content obtained by the treatment of the present invention has good grindability.
For example, as a condition that solid fuel can be suitably used in a cement kiln, the ratio of the particle size of 1.5 mm or less is preferably 90% or more, but the treated product of the present invention can be pulverized to such a particle size. Is possible.

実施例１
全塩素濃度４５．７質量％、粒径３mmのＰＶＣ（ポリ塩化ビニル）コンパウンドについて、図１に示す過熱水蒸気装置（サンケイエンジニアリング社製；装置の概要を以下に示す）を用いて、以下の処理条件で処理を行った。 Example 1
A PVC (polyvinyl chloride) compound having a total chlorine concentration of 45.7% by mass and a particle size of 3 mm is subjected to the following treatment using the superheated steam apparatus (manufactured by Sankei Engineering Co., Ltd .; the outline of the apparatus is shown below) shown in FIG. Processing was performed under conditions.

（過熱水蒸気装置）
・バッチ式処理反応槽
・ステンレスメッシュ反応容器
・飽和水蒸気・過熱水蒸気連続生成
（ＩＨヒーターにより、１００℃の飽和水蒸気を連続して二次加熱し過熱水蒸気を生成)
（処理条件）
・ＰＶＣコンパウンド充填量：１０ｇ
・飽和水蒸気発生量：１．８kg／hr（１００℃）
・過熱度：１１５Ｋ、１３５Ｋ、１４５Ｋ
・処理時間：３０分間、６０分間、９０分間 (Superheated steam equipment)
・ Batch treatment reactor ・ Stainless steel mesh reaction vessel ・ Saturated steam / superheated steam continuous generation (Saturated steam at 100 ° C is secondarily heated continuously by IH heater to generate superheated steam)
(Processing conditions)
・ PVC compound filling amount: 10g
・ Saturated water vapor generation rate: 1.8 kg / hr (100 ° C.)
・ Superheat: 115K, 135K, 145K
・ Processing time: 30 minutes, 60 minutes, 90 minutes

処理物の全塩素濃度を、エシュカ法（ＪＩＳ Ｍ８８１３「石炭類及びコークス類−元素分析方法」およびＪＩＳ Ｚ７３０２−６「廃棄物固形化燃料−第６部：全塩素分試験方法」解説に記載の方法）にて測定したところ、表１に示す結果となった。処理前の全塩素濃度４５．７質量％に比較して全塩素濃度が低減し、本発明の処理物では脱塩されていることを確認した。   The total chlorine concentration of the treated material is described in the explanation of the Eshka method (JIS M8813 “Coals and cokes—elemental analysis method” and JIS Z7302-6 “Waste solidified fuel—Part 6: Total chlorine content test method”. Method), the results shown in Table 1 were obtained. Compared to the total chlorine concentration before treatment of 45.7% by mass, the total chlorine concentration was reduced, and it was confirmed that the treated product of the present invention was desalted.

試験例１
実施例１の処理物のうち、２４０℃の処理物について、ボンブ法（ＪＩＳ Ｚ７３０２−６「廃棄物固形化燃料−第６部：全塩素分試験方法」解説に記載の方法）にて総発熱量を測定した。また、塩素残存量を全塩素濃度から、その他の化学成分（炭素、水素等）残存量を、処理物の質量から塩素残存量を減ずることにより求めたところ、図２に示す結果となった。
本発明の処理方法では、脱塩する割合が、その他の化学成分（炭素、水素等）が分解する割合よりも大きいため、処理後の固形燃料では処理前に比較して総発熱量が増加し、燃料品位が良好となった。 Test example 1
Of the treated product of Example 1, the treated product at 240 ° C. was totally exothermic by the bomb method (method described in JIS Z7302-6 “Waste Solidified Fuel-Part 6: Total Chlorine Test Method”). The amount was measured. Further, when the residual chlorine amount was determined from the total chlorine concentration and the residual amount of other chemical components (carbon, hydrogen, etc.) was determined by subtracting the residual chlorine amount from the mass of the treated product, the results shown in FIG. 2 were obtained.
In the treatment method of the present invention, since the rate of desalting is larger than the rate of decomposition of other chemical components (carbon, hydrogen, etc.), the total calorific value of the solid fuel after treatment increases compared to before treatment. The fuel quality was good.

試験例２
実施例１の処理物のうち、２１５℃−３０分、２４０℃−９０分の処理物と未処理物について液体窒素で凍結した後、大阪ケミカル社製ワンダーブレンダーにて２０秒間粉砕を行い、粉砕物を１．５mm、１．０mm、０．５mmの篩目で、篩い分けした。結果を表２に示す。
本発明の処理物は、未処理物に比較して被粉砕性に優れ、篩目１．５mmを９０質量％通過しており、セメント焼成キルンで使用する燃料として好適に用いられる固形燃料であることを確認した。
なお、この試験例では、粉砕条件を一定にするため、凍結粉砕を行ったが、本発明の処理物は、凍結処理しない粉砕方法であっても、同様に、１．５mm以下に粉砕することができる。 Test example 2
Of the treated product of Example 1, the treated product and the untreated product at 215 ° C.-30 minutes, 240 ° C.-90 minutes were frozen with liquid nitrogen, and then pulverized for 20 seconds with a wonder blender manufactured by Osaka Chemical Co., Ltd. The product was sieved with 1.5 mm, 1.0 mm, and 0.5 mm sieve meshes. The results are shown in Table 2.
The treated product of the present invention is a solid fuel that is excellent in grindability compared with untreated products, passes through 90% by mass of a sieve mesh of 1.5 mm, and is suitably used as a fuel used in a cement fired kiln. It was confirmed.
In this test example, freeze pulverization was performed in order to make the pulverization conditions constant. However, the processed product of the present invention should also be pulverized to 1.5 mm or less, even if the pulverization method does not freeze. Can do.

実施例２
全塩素濃度１．０３質量％、総発熱量７１００kcal／kg の RPF（Refuse Paper ＆ Plastic Fuel）について、実施例１で用いた過熱水蒸気装置（サンケイエンジニアリング社製）を用いて、以下の処理条件で処理を行った。
(処理条件)
・RPF充填量：４ｇ
・飽和水蒸気発生量：１．８kg／hr（１００℃）
・過熱度：１３５Ｋ
・処理時間：９０分間 Example 2
About RPF (Refuse Paper & Plastic Fuel) with total chlorine concentration of 1.03 mass% and total calorific value of 7100 kcal / kg, using the superheated steam device (manufactured by Sankei Engineering Co., Ltd.) used in Example 1 under the following processing conditions: Processed.
(Processing conditions)
・ RPF filling amount: 4g
・ Saturated water vapor generation rate: 1.8 kg / hr (100 ° C.)
・ Superheat: 135K
・ Processing time: 90 minutes

実施例１と同様にして、処理物の全塩素濃度をエシュカ法にて測定したところ、全塩素濃度は０．１４質量％まで低減され、本発明の処理物では脱塩されていることが確認された。   When the total chlorine concentration of the treated product was measured by the Eshka method in the same manner as in Example 1, the total chlorine concentration was reduced to 0.14% by mass, and it was confirmed that the treated product of the present invention was desalted. It was.

また、試験例１と同様にして、処理物の総発熱量をボンブ法にて測定したところ、総発熱量は７２００kcal／kgまで増加し、本発明の処理物では燃料品位が良好となった。   Further, when the total calorific value of the treated product was measured by the bomb method in the same manner as in Test Example 1, the total calorific value increased to 7200 kcal / kg, and the treated product of the present invention showed good fuel quality.

実施例３
全塩素濃度１．５質量％のASR（Automobile Shredder Residue）破砕品について、実施例１で用いた過熱水蒸気装置（サンケイエンジニアリング社製）を用いて、以下の処理条件で、加熱分解処理を行った後、水洗脱塩処理を行った。水洗処理は、ビーカー中の水に固形分を懸濁した後、漏斗で濾過して行った。 Example 3
About ASR (Automobile Shredder Residue) crushed product having a total chlorine concentration of 1.5% by mass, the thermal decomposition treatment was performed using the superheated steam device (manufactured by Sankei Engineering Co., Ltd.) used in Example 1 under the following treatment conditions. Thereafter, washing with water and desalting were performed. The water washing treatment was performed by suspending solids in water in a beaker and then filtering with a funnel.

（加熱処理条件）
・ASR充填量：４ｇ
・飽和水蒸気発生量：１.８kg/h（１００℃）
・過熱度：１３５Ｋ
・処理時間： ０分間、９０分間
(水洗処理条件)
・水洗水量：４０ｇ
・水洗温度：３０℃
・水洗時間：１０分 (Heat treatment conditions)
・ ASR filling amount: 4g
・ Saturated steam generation: 1.8kg / h (100 ℃)
・ Superheat: 135K
・ Processing time: 0 minutes, 90 minutes
(Washing conditions)
・ Washing water amount: 40g
・ Washing temperature: 30 ℃
・ Washing time: 10 minutes

実施例１と同様にして、加熱分解処理後および水洗脱塩後の処理物の全塩素濃度をエシュカ法にて測定した。なお、水洗脱塩後の処理物は、乾燥温度４０℃にて恒量に達した後に測定を行った。
表３に示す結果のように、加熱後に塩素が残留する試料においても、水洗することによって脱塩できることが確認された。 In the same manner as in Example 1, the total chlorine concentration of the processed product after the thermal decomposition treatment and after the water washing and desalting was measured by the Eshka method. In addition, the processed material after water-washing and desalting was measured after reaching a constant weight at a drying temperature of 40 ° C.
As shown in the results shown in Table 3, it was confirmed that even a sample in which chlorine remains after heating can be desalted by washing with water.

Claims (6)

塩素を含む廃棄物を高温で分解脱塩し且つ乾燥する廃棄物の処理方法において、廃棄物を反応容器内に導入するとともに、過熱水蒸気を前記反応容器に供給・排出し、反応容器内で廃棄物中の有機塩素を熱分解した後、前記反応容器内に残留した固形分を再生固形燃料として反応容器外に導出することを特徴とする廃棄物の処理方法。   In a waste treatment method in which waste containing chlorine is decomposed and desalted at high temperature and dried, waste is introduced into the reaction vessel, and superheated steam is supplied to and discharged from the reaction vessel and discarded in the reaction vessel. A method for treating waste, comprising pyrolyzing organic chlorine in a product and then deriving the solid content remaining in the reaction vessel as a regenerated solid fuel outside the reaction vessel. 過熱水蒸気の温度が２１０〜３５０℃である請求項１記載の処理方法。   The processing method according to claim 1, wherein the temperature of the superheated steam is 210 to 350 ° C. 過熱水蒸気の過熱度が６０〜２５０Ｋである請求項１又は２記載の処理方法。   The processing method according to claim 1 or 2, wherein the superheated steam has a superheat degree of 60 to 250K. 過熱水蒸気の処理時間が１０分以上である請求項１〜３のいずれか１項記載の処理方法。   The processing method according to any one of claims 1 to 3, wherein the processing time of the superheated steam is 10 minutes or more. 反応容器内で気化された塩素を、該反応容器内の過熱水蒸気によって反応容器外に導出する請求項１〜４のいずれか１項記載の処理方法。   The processing method according to any one of claims 1 to 4, wherein chlorine vaporized in the reaction vessel is led out of the reaction vessel by superheated steam in the reaction vessel. 反応容器外に導出した固形分を、水洗する請求項１〜４のいずれか１項記載の処理方法。   The processing method of any one of Claims 1-4 which wash with water the solid content derived | led-out outside the reaction container.
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