JP2003080226A - Cleaning method for contaminated soil and asphalt plant - Google Patents
Cleaning method for contaminated soil and asphalt plantInfo
- Publication number
- JP2003080226A JP2003080226A JP2001272814A JP2001272814A JP2003080226A JP 2003080226 A JP2003080226 A JP 2003080226A JP 2001272814 A JP2001272814 A JP 2001272814A JP 2001272814 A JP2001272814 A JP 2001272814A JP 2003080226 A JP2003080226 A JP 2003080226A
- Authority
- JP
- Japan
- Prior art keywords
- soil
- dust
- contaminated soil
- dryer
- heating
- 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
Classifications
-
- 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
- Y02W30/82—Recycling of waste of electrical or electronic equipment [WEEE]
Landscapes
- Incineration Of Waste (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、軽油、重油などの
油分を含んだ汚染土壌を処理する方法に関し、特に道路
舗装材を製造するアスファルトプラントを利用して汚染
土壌を浄化処理する方法、及びその装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating contaminated soil containing oil such as light oil and heavy oil, and in particular, a method for purifying contaminated soil using an asphalt plant for producing road paving materials, and Regarding the device.
【0002】[0002]
【従来の技術】近年、産業活動に伴って各事業所の敷地
内やその周辺地域の土壌が油などの揮発性汚染物質の廃
液によって汚染され、その土壌の地下を流れる地下水に
まで汚染が及んでいるといったことが取り沙汰されて問
題となっている。このように油を含有する土壌を処理す
るために、その土壌を掘削して汚染土壌の浄化処理プラ
ントにて加熱処理し、土壌にしみ込んでいる揮発性汚染
物質を燃焼分解させて土壌の浄化処理を行っている。2. Description of the Related Art In recent years, along with industrial activities, the soil in the premises of each business establishment and the surrounding area has been contaminated by waste liquid of volatile pollutants such as oil, and the groundwater flowing underground in the soil has also been contaminated. It has been a problem since it was said that it was in trouble. In order to treat oil-containing soil in this way, the soil is excavated and heat-treated in a contaminated soil purification treatment plant to burn and decompose volatile pollutants that have soaked into the soil to purify soil. It is carried out.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、汚染土
壌の浄化処理プラントを新たに設置するとなると、環境
面に配慮してそれなりの面積の敷地も確保しなければな
らないし、また装置コストも高額となるので専用のプラ
ント工場を設置するには経済的な負担も大きいという問
題点がある。However, when a contaminated soil purification treatment plant is newly installed, it is necessary to secure a site of a certain area in consideration of the environment, and the cost of the equipment becomes high. Therefore, there is a problem that the economical burden is large when a dedicated plant factory is installed.
【0004】本発明は上記の点に鑑み、汚染土壌の浄化
処理を低コストにて行える汚染土壌の浄化処理方法、及
びその装置を提供することを課題とする。In view of the above points, it is an object of the present invention to provide a method for cleaning contaminated soil and a device for cleaning contaminated soil at low cost.
【0005】[0005]
【課題を解決するための手段】本発明者らは、汚染土壌
を加熱浄化処理する装置として道路舗装材製造用のアス
ファルトプラントに着目した。アスファルトプラントの
設置工場は環境に配慮したそれなりの敷地面積を有し、
また土壌汚染処理プラントと兼用できる加熱装置等が設
備されている。この敷地と装置を利用してアスファルト
プラントを汚染土壌の浄化処理兼用のプラントとすれば
低コストにて汚染土壌の浄化処理が実現できると考え
た。[Means for Solving the Problems] The present inventors have focused on an asphalt plant for producing road paving materials as a device for heating and purifying contaminated soil. The installation plant of the asphalt plant has its own site area in consideration of the environment,
In addition, a heating device that can also be used as a soil pollution treatment plant is installed. We thought that if the asphalt plant was also used as a plant for the purification treatment of contaminated soil using this site and equipment, the purification treatment of contaminated soil could be realized at low cost.
【0006】即ち、本発明は、アスファルトプラントの
骨材加熱用のドライヤを骨材加熱用と汚染土壌加熱浄化
用との兼用の加熱手段として構成すると共に、ドライヤ
の排気煙道に介在させた集塵機の下流には排ガス中の揮
発性汚染物質を燃焼分解する脱臭炉を配設したことを特
徴としている。That is, according to the present invention, the dryer for heating the aggregate of the asphalt plant is constituted as a heating means for both heating the aggregate and for cleaning and purifying the contaminated soil, and a dust collector interposed in the exhaust flue of the dryer. It is characterized in that a deodorizing furnace for burning and decomposing volatile pollutants in exhaust gas is disposed downstream of the above.
【0007】また、集塵機にて捕捉したダストを受け入
れてダスト中に含まれる揮発性汚染物質を燃焼分解する
ダスト浄化処理装置を配設したことを特徴としている。Further, the present invention is characterized in that a dust purification processing device is provided for receiving the dust captured by the dust collector and burning and decomposing the volatile pollutants contained in the dust.
【0008】また、加熱浄化して高温となった土壌を受
け入れて所定温度まで冷却する土壌冷却装置を配設した
ことを特徴としている。Further, the present invention is characterized by being provided with a soil cooling device which receives the soil which has been heated and purified to have a high temperature and cools it to a predetermined temperature.
【0009】[0009]
【発明の実施の形態】本発明によれば、アスファルトプ
ラントの設備を利用して汚染土壌の浄化処理を行うもの
で、骨材加熱用のドライヤ、即ち、アスファルトプラン
トにて設置される新規骨材加熱用のドライヤもしくはア
スファルト舗装廃材加熱用のドライヤのいずれかを利用
して汚染土壌の加熱を行う。また、アスファルトプラン
トにおいて汚染土壌の浄化処理が行えるように、脱臭炉
などの必要な設備を追加設置している。BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a contaminated soil is purified by using equipment of an asphalt plant, and a dryer for heating an aggregate, that is, a new aggregate installed in the asphalt plant. Contaminated soil is heated using either a dryer for heating or a dryer for heating asphalt pavement waste. In addition, necessary equipment such as a deodorizing furnace is additionally installed so that contaminated soil can be purified in an asphalt plant.
【0010】そして、汚染土壌を浄化処理するときに
は、汚染土壌をドライヤに連続的に投入していく。ドラ
イヤに投入された汚染土壌はドライヤ内を転動流下する
間にバーナからの熱風に晒され、土壌中の油などの揮発
性汚染物質の一部は揮発分離または燃焼分解されていく
一方、土壌中の揮発性汚染物質を多く含む微粒分はドラ
イヤのガス流に同伴してドライヤ下流へと飛散してい
く。このドライヤでの汚染物質の揮発と飛散とによっ
て、ドライヤから排出される土壌は汚染濃度の低い浄化
されたものとなる。When the contaminated soil is purified, the contaminated soil is continuously fed into the dryer. The contaminated soil put into the dryer is exposed to the hot air from the burner while rolling down in the dryer, and some of the volatile pollutants such as oil in the soil are volatilized or combusted and decomposed, while the soil The fine particles containing a large amount of volatile pollutants inside are entrained in the gas flow of the dryer and scattered to the downstream of the dryer. Due to the volatilization and scattering of pollutants in the dryer, the soil discharged from the dryer has a low pollutant concentration and is purified.
【0011】一方、ドライヤのガス流に乗って飛散する
微粒分は集塵機へと導かれて捕捉される。そして集塵機
を通過した排ガスは脱臭炉へと導かれ、脱臭炉では排ガ
ス中に含まれる汚染物質の揮発分が高温に晒され、燃焼
分解して浄化処理される。On the other hand, the fine particles scattered on the gas flow of the dryer are guided to and collected by the dust collector. Then, the exhaust gas that has passed through the dust collector is guided to the deodorizing furnace, where the volatile components of the pollutants contained in the exhaust gas are exposed to a high temperature, burned and decomposed, and purified.
【0012】このように、アスファルトプラントを汚染
土壌浄化処理兼用のプラントとすれば、新たに専用の汚
染土壌浄化処理プラントとして設置するよりも設備投資
を抑えられ、低コストにて汚染土壌の浄化処理を実現で
きる。As described above, if the asphalt plant is also used as a contaminated soil remediation treatment plant, the capital investment can be suppressed and the contaminated soil remediation treatment can be carried out at a low cost as compared with the case where a new dedicated contaminated soil remediation treatment plant is installed. Can be realized.
【0013】また、集塵機にて捕捉したダストを受け入
れてダスト中に含まれる揮発性汚染物質を燃焼分解する
ダスト浄化処理装置を配設したので、集塵機にて捕捉し
たダストをダスト浄化処理装置に供給して付着している
揮発性汚染物質を燃焼分解できる。これによって汚染土
壌は完全に浄化処理でき、汚染土壌の浄化処理に好適な
プラントとなる。Further, since the dust purifying processing device for receiving the dust captured by the dust collector and burning and decomposing the volatile pollutants contained in the dust is provided, the dust captured by the dust collector is supplied to the dust cleaning treatment device. Then, the volatile pollutants adhering to it can be decomposed by combustion. As a result, the contaminated soil can be completely purified, and the plant becomes suitable for the purification treatment of the contaminated soil.
【0014】また、加熱浄化した土壌を受け入れて冷却
する土壌冷却装置を配設したので、高温の土壌を土壌冷
却装置に供給して所定温度まで冷却することができる。
これによって浄化処理直後の土壌でも取り扱い容易とな
り、汚染土壌の浄化処理に一層好適なプラントとなる。Further, since the soil cooling device for receiving and cooling the heat-purified soil is provided, it is possible to supply the high temperature soil to the soil cooling device and cool it to a predetermined temperature.
This makes it easy to handle soil immediately after purification, and makes the plant more suitable for purification of contaminated soil.
【0015】[0015]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【0016】図1は汚染土壌浄化処理兼用のアスファル
トプラントであって、先ず、公知のアスファルトプラン
トの装置構成について説明すると、図中の1は新規骨材
を加熱するドライヤであって、内周部に多数の掻き上げ
羽根(図示せず)を周設した円筒状のドラム2を機台3
上に回転自在に傾斜支持し、駆動装置(図示せず)によ
り所定の速度で回転させるようにしており、ドラム2の
一端部のホットホッパ4に配設したバーナ5よりドラム
2内に熱風を送り込む一方、他端部のコールドホッパ6
には排気煙道7を連結しており、該排気煙道7に介在さ
せた排風機8によって排ガスを吸引してドラム2内を通
過する高温ガス流を維持すると共に、バグフィルタなど
の集塵機9を経由させて排ガス中のダストを捕捉して煙
突10より放出している。FIG. 1 shows an asphalt plant that also serves as a contaminated soil remediation treatment. First, a device configuration of a known asphalt plant will be explained. In the figure, 1 is a dryer for heating a new aggregate, and an inner peripheral portion thereof. A cylindrical drum 2 around which a large number of blades (not shown) are installed
It is rotatably supported on the upper side and is rotated at a predetermined speed by a driving device (not shown). Hot air is introduced into the drum 2 from a burner 5 provided in a hot hopper 4 at one end of the drum 2. While feeding, cold hopper 6 at the other end
An exhaust flue 7 is connected to the exhaust flue 7. The exhaust fan 8 interposed in the exhaust flue 7 sucks the exhaust gas to maintain a high-temperature gas flow passing through the inside of the drum 2, and a dust collector 9 such as a bag filter. The dust in the exhaust gas is captured via the exhaust gas and discharged from the stack 10.
【0017】そして、粒度別に新規骨材を貯蔵している
骨材ホッパ群(図示せず)から骨材を所定量ずつ払い出
し、払い出した骨材をベルトコンベヤ11を介してドラ
ム2内に送り込み、掻き上げ羽根で掻き上げながらドラ
ム2内を転動流下させる間に高温ガス流と接触させ、所
望温度まで昇温させてホットホッパ4より排出してい
る。Then, a predetermined amount of aggregate is dispensed from an aggregate hopper group (not shown) that stores new aggregate according to grain size, and the dispensed aggregate is fed into the drum 2 via the belt conveyor 11, While being rolled up by the scraping blades, the drum 2 is brought into contact with the high-temperature gas flow while rolling down, and the temperature is raised to a desired temperature and discharged from the hot hopper 4.
【0018】ドラム2より排出した骨材は、排出シュー
ト12を介して垂直搬送装置であるバケットエレベータ
13へ投入し、このバケットエレベータ13によってプ
ラント本体14上部まで持ち上げ、バケットエレベータ
13上部の排出シュート15を介してプラント本体14
最上部の振動篩16に投入し、粒度別に篩い分けて骨材
貯蔵ビン17の各区画室に貯蔵する。The aggregate discharged from the drum 2 is thrown into a bucket elevator 13 which is a vertical transfer device through a discharge chute 12 and lifted up to the upper part of the plant body 14 by the bucket elevator 13 to discharge the chute 15 above the bucket elevator 13. Through the plant body 14
The mixture is put into the uppermost vibrating screen 16, screened according to particle size, and stored in each compartment of the aggregate storage bin 17.
【0019】骨材貯蔵ビン17の各区画室の下端にはそ
れぞれ骨材排出用の排出ゲート(図示せず)を備えてお
り、その下位には重量検出器にて支持する骨材計量槽1
8を配設すると共に、石粉貯蔵ビン19のスクリューフ
ィーダ20にて供給される石粉を計量する石粉計量槽2
1、アスファルトを計量するアスファルト計量槽22を
配設し、更にその下位にはミキサ23を配設しており、
所定量の各材料を上記各計量槽にて計量し、ミキサ23
にて混合調整して所望のアスファルト混合物を生産して
いる。A discharge gate (not shown) for discharging aggregate is provided at the lower end of each compartment of the aggregate storage bin 17, and an aggregate measuring tank 1 supported by a weight detector is provided below the discharge gate.
The stone powder measuring tank 2 for arranging 8 and measuring the stone powder supplied by the screw feeder 20 of the stone powder storage bottle 19
1. An asphalt measuring tank 22 for measuring asphalt is arranged, and a mixer 23 is arranged below it.
A predetermined amount of each material is weighed in each of the above-mentioned weighing tanks, and the mixer 23
The desired asphalt mixture is produced by mixing and adjusting.
【0020】上記公知のアスファルトプラントの構成に
加えて、排気煙道7の排風機8と煙突10の間には脱臭
炉24を介在させており、該脱臭炉24の一端には炉内
温度を所定値に維持するためのバーナ25を備えてお
り、炉内に導入するドライヤ1からの排ガスを高温雰囲
気に晒し、排ガス中に含まれる油などの揮発性汚染物質
を燃焼分解してから煙突10より排気するようにしてい
る。なお、脱臭炉24は揮発性汚染物質が完全に燃焼分
解できるように、炉内温度を例えば、略750℃以上の
高温を維持するようにバーナ25の燃焼量をコントロー
ルすると共に、排ガスが炉内を通過するのに少なくとも
1乃至2秒以上かかる程度の炉長を確保することが好ま
しい。In addition to the configuration of the above-mentioned known asphalt plant, a deodorizing furnace 24 is interposed between the exhaust fan 8 and the stack 10 of the exhaust flue 7, and the furnace temperature is provided at one end of the deodorizing furnace 24. The chimney 10 is provided with a burner 25 for maintaining a predetermined value, exposing exhaust gas from the dryer 1 introduced into the furnace to a high temperature atmosphere to combust and decompose volatile pollutants such as oil contained in the exhaust gas. I try to exhaust more. In the deodorization furnace 24, the combustion amount of the burner 25 is controlled so that the temperature inside the furnace is maintained at a high temperature of, for example, approximately 750 ° C. or more so that the volatile pollutants can be completely combusted and decomposed, and the exhaust gas is discharged into the furnace It is preferable to secure a furnace length such that it takes at least 1 to 2 seconds or more to pass through.
【0021】26、27は熱交換器であって、前記脱臭
炉24から排出される高温の排ガスが有する排ガス熱を
有効利用するためのものであり、熱交換器26はドライ
ヤ1から脱臭炉24へ導入する排ガスの予熱を、また熱
交換器27は燃焼用空気供給ファン28から脱臭炉24
のバーナ25へ供給する燃焼用空気の予熱を図ってい
る。Reference numerals 26 and 27 denote heat exchangers for effectively utilizing exhaust gas heat contained in the high-temperature exhaust gas discharged from the deodorization furnace 24. The heat exchanger 26 is provided from the dryer 1 to the deodorization furnace 24. The preheat of the exhaust gas to be introduced into the deodorizing furnace 24 from the combustion air supply fan 28 and the heat exchanger 27.
The preheating of the combustion air supplied to the burner 25 of FIG.
【0022】また、バケットエレベータ13の排出シュ
ート15の途中には分岐シュート29を配設しており、
該分岐シュート29の分岐部には排出シュート15を流
れる材料がアスファルト混合物製造用の骨材か、或いは
加熱浄化した土壌かによって排出方向を振り分ける経路
変更用ダンパー30を回動自在に配設しており、図中の
実線で示すように位置した時には分岐シュート29側
へ、また二点鎖線で示すように位置した時には振動篩1
6側へ流れるようにしている。そして、分岐シュート2
9側に流れた土壌は浄化処理された土壌として回収され
る。A branch chute 29 is arranged in the middle of the discharge chute 15 of the bucket elevator 13.
At the branch portion of the branch chute 29, there is rotatably arranged a path changing damper 30 for allocating the discharge direction depending on whether the material flowing through the discharge chute 15 is an aggregate for producing an asphalt mixture or the soil purified by heating. When it is located as shown by the solid line in the figure, it is toward the branch chute 29 side, and when it is located as shown by the chain double-dashed line, the vibrating sieve 1
It is designed to flow to the 6 side. And branch shoot 2
The soil flowing to the 9th side is collected as purified soil.
【0023】また、集塵機9にて捕捉したダストには多
量の揮発性汚染物質が含まれており、このダストを浄化
処理させるためにダスト浄化処理装置31を設置してい
る。このダスト浄化処理装置31は新規骨材を加熱する
ドライヤ1と略同構造であって、内周部に多数の掻き上
げ羽根を周設した円筒状のドラム32を機台33上に回
転自在に傾斜支持し、駆動装置(図示せず)により所定
の速度で回転させるようにしており、ドラム2の一端部
のホットホッパ34に配設したバーナ35よりドラム3
2内に熱風を送り込む一方、他端部のコールドホッパ3
6には排気煙道37を連結しており、該排気煙道37に
介在させた排風機38によって排ガスを吸引してドラム
32内を通過する高温ガス流を維持すると共に、排気煙
道37を集塵機9の手前の排気煙道7に連結している。
そして、集塵機9にて捕捉したダストをダスト浄化処理
装置31のホットホッパ34側に投入する構造とし、並
流加熱方式によって加熱している。Further, the dust captured by the dust collector 9 contains a large amount of volatile pollutants, and a dust purification processing device 31 is installed to purify this dust. This dust purification processing device 31 has substantially the same structure as the dryer 1 that heats the new aggregate, and a cylindrical drum 32 having a large number of scraping blades around its inner periphery is rotatably mounted on a machine base 33. The drum 3 is tilted and is rotated at a predetermined speed by a driving device (not shown). The drum 3 is rotated by a burner 35 provided in a hot hopper 34 at one end of the drum 2.
2, while blowing hot air into the cold hopper 3 at the other end
An exhaust flue 37 is connected to the exhaust pipe 6, and exhaust gas is sucked by an exhaust fan 38 interposed in the exhaust flue 37 to maintain a high-temperature gas flow passing through the inside of the drum 32. It is connected to the exhaust flue 7 in front of the dust collector 9.
Then, the dust captured by the dust collector 9 is introduced into the hot hopper 34 side of the dust purification processing device 31, and heating is performed by a co-current heating method.
【0024】また、加熱浄化して高温になった土壌を冷
却する手段として土壌冷却装置39を配設しており、前
記分岐シュート29の先端を土壌冷却装置39に連結し
ている。土壌冷却装置39には前記ドライヤ1のドラム
2と略同様の構成をしたドラム40を備えており、内周
部に多数の掻き上げ羽根(図示せず)を周設した円筒状
のドラム40を機台41上に回転自在に傾斜支持し、駆
動装置(図示せず)により所定の速度で回転させるよう
にしている。A soil cooling device 39 is provided as a means for cooling the soil heated and purified to a high temperature, and the tip of the branch chute 29 is connected to the soil cooling device 39. The soil cooling device 39 is provided with a drum 40 having substantially the same configuration as the drum 2 of the dryer 1, and a cylindrical drum 40 having a large number of scraping blades (not shown) around its inner peripheral portion. It is rotatably supported on the machine base 41 so that it can be rotated at a predetermined speed by a driving device (not shown).
【0025】そして、ドラム40の一端部の投入ホッパ
42にはバーナに代えて水噴霧ノズル43を配設してお
り、ドラム40内に投入した高温土壌に水を噴霧し、適
当に湿潤、冷却して取り扱いに適した状態とするように
している。この水噴霧ノズル43から噴霧する水量は、
土壌冷却装置39へ投入する土壌の量と温度とを適宜検
出手段によって検出し、最適な水量を決定して噴霧する
ようにすると、投入する土壌の量や温度が変化しても加
湿過多による付着や詰まりを防止できると共に、加湿不
足による粉塵の発生も防止できる。また、土壌冷却装置
39の排出ホッパ44に排気ダクト45を連結し、該排
気ダクト45の末端を排気煙道7に連結し、土壌冷却装
置39内で発生する水蒸気を排気ダクト45を介して排
気煙道7へ導出するようにしている。A water spray nozzle 43 is provided in the charging hopper 42 at one end of the drum 40 in place of the burner, and water is sprayed on the high temperature soil charged in the drum 40 so as to be appropriately wetted and cooled. To make it suitable for handling. The amount of water sprayed from the water spray nozzle 43 is
When the amount and temperature of the soil to be put into the soil cooling device 39 are appropriately detected by the detection means to determine the optimum amount of water for spraying, even if the amount or temperature of the soil to be input changes, adhesion due to excessive humidification will occur. In addition to preventing clogging, it is possible to prevent dust generation due to insufficient humidification. Further, an exhaust duct 45 is connected to the discharge hopper 44 of the soil cooling device 39, the end of the exhaust duct 45 is connected to the exhaust flue 7, and water vapor generated in the soil cooling device 39 is exhausted via the exhaust duct 45. It is arranged to lead to the flue 7.
【0026】なお、ドライヤ1にて加熱浄化した土壌を
土壌冷却装置39に供給する手段として、バケットエレ
ベータ13、分岐シュート29を介して供給するとした
が、ドライヤ1の排出シュート12に振り分け手段等を
配設し、加熱土壌を点線の矢印に示すようにして土壌冷
却装置39へ供給するようにしても良い。Although the soil heated and purified by the dryer 1 is supplied to the soil cooling device 39 through the bucket elevator 13 and the branch chute 29, the discharging chute 12 of the dryer 1 is provided with a distribution means or the like. Alternatively, the heated soil may be supplied to the soil cooling device 39 as shown by a dotted arrow.
【0027】しかして、上記構成としたアスファルトプ
ラントによって汚染土壌を浄化処理するときには、先
ず、汚染土壌を図示しない前処理装置である篩や磁選機
にてオーバーサイズのものや異物を除去した後、ベルト
コンベヤ11を介してドライヤ1に投入し、バーナ5か
らの熱風に晒して汚染土壌を所定温度まで加熱する。こ
の加熱によって汚染土壌中の揮発性汚染物質は、揮発分
離、或いは燃焼分解させられる一方、ドライヤ1内を通
過するガス流に乗って土壌中の揮発性汚染物質を多く含
む微粒分がドライヤ1下流へと飛散し、土壌の浄化が行
われる。Therefore, when the contaminated soil is purified by the asphalt plant having the above-mentioned structure, first, the contaminated soil is removed from the oversized ones and the foreign matters by a pretreatment device such as a sieve or a magnetic separator, which is not shown. It is put into the dryer 1 through the belt conveyor 11 and exposed to hot air from the burner 5 to heat the contaminated soil to a predetermined temperature. By this heating, the volatile pollutants in the contaminated soil are volatilized, separated or burned and decomposed, while the fine particles containing a large amount of the volatile pollutants in the soil are carried on the gas stream passing through the dryer 1 and downstream of the dryer 1. It scatters and the soil is purified.
【0028】そして、ドライヤ1から導出される排ガス
は集塵機9へと導かれ、集塵機9にて汚染物質を多く含
む微細分が捕捉される。そして集塵機9を通過した排ガ
スは、脱臭炉24へと導かれて炉内の高温雰囲気に晒さ
れ、排ガス中に残る揮発性汚染物質が完全に燃焼分解さ
れる。Then, the exhaust gas discharged from the dryer 1 is guided to the dust collector 9, and the dust collector 9 captures fine particles containing a large amount of pollutants. The exhaust gas that has passed through the dust collector 9 is guided to the deodorizing furnace 24 and exposed to the high temperature atmosphere in the furnace, and the volatile pollutants remaining in the exhaust gas are completely combusted and decomposed.
【0029】一方、ドライヤ1内の土壌は、ホットホッ
パ4側から順次排出され、バケットエレベータ13を介
してプラント本体14上位まで持ち上げられ、排出シュ
ート15から排出されていく。このとき、経路変更用ダ
ンパー30は図1中の実線位置へ回動させており、排出
シュート15より流下してくる土壌を分岐シュート29
側へと落下させ、土壌冷却装置39へと投入していく。
そして、土壌冷却装置39に投入された土壌は、撹拌羽
根によって転動流下させながら水噴霧ノズル43より水
を噴霧され、適当に湿潤、冷却して取り扱いに適した状
態となる。On the other hand, the soil in the dryer 1 is sequentially discharged from the hot hopper 4 side, lifted to the upper position of the plant main body 14 via the bucket elevator 13, and discharged from the discharge chute 15. At this time, the path changing damper 30 is rotated to the solid line position in FIG. 1, and the soil flowing down from the discharge chute 15 is branched into the chute 29.
It is dropped to the side and thrown into the soil cooling device 39.
Then, the soil put into the soil cooling device 39 is sprayed with water from the water spray nozzle 43 while being tumbled down by the stirring blade, and is appropriately wetted and cooled to be in a state suitable for handling.
【0030】また、集塵機9にて捕捉したダストには多
量の揮発性汚染物質が付着しており、このダストを浄化
処理するために、ダスト浄化処理装置31に供給する。
ダスト浄化処理装置31内に供給されたダストはバーナ
35の熱風に晒され、ダスト中の揮発性汚染物質が燃焼
分解される。このダスト浄化処理装置31にて加熱浄化
されたダストは土壌冷却装置39へと供給され、所定温
度まで冷やされる。Further, a large amount of volatile pollutants are attached to the dust captured by the dust collector 9, and the dust is supplied to the dust purification processing device 31 in order to purify the dust.
The dust supplied into the dust purification processing device 31 is exposed to the hot air of the burner 35, and the volatile pollutants in the dust are burned and decomposed. The dust heated and purified by the dust purification processing device 31 is supplied to the soil cooling device 39 and cooled to a predetermined temperature.
【0031】このように、アスファルトプラントに脱臭
炉24、ダスト浄化処理装置31、土壌冷却装置39な
どを追加設備し、アスファルトプラントを汚染土壌浄化
処理可能なプラントとすれば、専用の汚染土壌浄化処理
プラントを設置するよりも設備投資を抑えられ、低コス
トにて汚染土壌の浄化処理を実現できる。また、アスフ
ァルトプラントを汚染土壌浄化兼用のプラントとすれば
プラントの稼働率も向上し、プラントを効率よく使用で
きる。In this way, if the asphalt plant is additionally equipped with the deodorizing furnace 24, the dust purification treatment device 31, the soil cooling device 39, etc., and the asphalt plant is made into a plant capable of contaminated soil purification treatment, a dedicated contaminated soil purification treatment is carried out. Capital investment can be reduced compared to setting up a plant, and a contaminated soil can be purified at low cost. Further, if the asphalt plant is also used as a plant for cleaning polluted soil, the operating rate of the plant is improved and the plant can be used efficiently.
【0032】また、図2はダスト浄化処理装置31と土
壌冷却装置39の他の実施例を示したものであって、図
2において図1と同一符号は、同一構成要素を示し、そ
の説明は省略する。FIG. 2 shows another embodiment of the dust purification processing device 31 and the soil cooling device 39. In FIG. 2, the same reference numerals as those in FIG. Omit it.
【0033】図2中のダスト浄化処理装置31を簡単に
説明する。ダスト浄化処理装置31は、排ガスを利用し
て集塵機9の捕捉ダストを間接加熱する構造となってお
り、ケーシング46内にダストを移送するスクリュー4
7を配設すると共に、ケーシング46周囲をカバー筒4
8にて包囲している。前記カバー筒48の一端部には脱
臭炉24の熱風を導入する熱風ダクト49を連結すると
共に、他端部には熱風を吸引排気するファン50を介在
させた排気ダクト51を連結している。また、ケーシン
グ46には発生する揮発分を排気するファン52を介在
させた排気ダクト53を連結している。The dust purification processing device 31 in FIG. 2 will be briefly described. The dust purification processing device 31 has a structure for indirectly heating the dust captured by the dust collector 9 using the exhaust gas, and the screw 4 for transferring the dust into the casing 46.
7 is provided, and the periphery of the casing 46 is covered by the cylinder 4
Surrounded by 8. A hot air duct 49 for introducing the hot air of the deodorizing furnace 24 is connected to one end of the cover cylinder 48, and an exhaust duct 51 having a fan 50 for sucking and exhausting the hot air is connected to the other end. Further, an exhaust duct 53 with a fan 52 for exhausting generated volatile components is connected to the casing 46.
【0034】そして、集塵機9にて捕捉したダストをケ
ーシング46内に投入し、スクリュー47にて移送させ
ながら、カバー筒48内に熱風を通過させ、間接加熱に
よってダスト中の揮発性汚染物質を燃焼分解する。な
お、加熱時のダスト飛散を避けるために間接加熱方式を
採用したが、熱風をケーシング46内に導入してダスト
を直接加熱しても良く、この場合には排ガスを集塵機9
へと導くようにすると良い。Then, the dust captured by the dust collector 9 is put into the casing 46, hot air is passed through the cover cylinder 48 while being transferred by the screw 47, and volatile pollutants in the dust are burned by indirect heating. Disassemble. Although the indirect heating method is adopted in order to avoid dust scattering at the time of heating, hot air may be introduced into the casing 46 to directly heat the dust. In this case, the exhaust gas is collected by the dust collector 9
It is good to lead to.
【0035】また、図2中の土壌冷却装置39は、ケー
シング54内に撹拌羽根55を適宜間隔で取り付けた軸
体56を貫通させて両端部を回転自在に軸支し、駆動装
置(図示せず)にて所定速度で回転させるようにすると
共に、ケーシング54の一端に土壌の供給口57を、他
端に排出口58を備えており、前記供給口57に分岐シ
ュート29の先端を連結している。In the soil cooling device 39 shown in FIG. 2, a shaft 56 having agitation blades 55 mounted at appropriate intervals in a casing 54 is penetrated to rotatably support both ends of the shaft 56, and a drive device (not shown). The casing 54 is provided with a soil supply port 57 at one end and a discharge port 58 at the other end, and the tip of the branch chute 29 is connected to the supply port 57. ing.
【0036】また、ケーシング54には水噴霧ノズル5
9を備えており、ケーシング54内に投入した高温の土
壌を撹拌羽根55にて撹拌しながら水噴霧ノズル59よ
り水を噴霧し、適当に湿潤、冷却して取り扱いに適した
状態として排出口58から順次排出する。また、ケーシ
ング54にて発生する水蒸気は排気ダクト60を介して
排気煙道7へと導出している。The casing 54 has a water spray nozzle 5
9, the high temperature soil put into the casing 54 is sprayed with water from a water spray nozzle 59 while being stirred by a stirring blade 55, and is appropriately moistened and cooled to be in a state suitable for handling and an outlet 58. It discharges sequentially. Further, the water vapor generated in the casing 54 is led to the exhaust flue 7 via the exhaust duct 60.
【0037】このように、土壌冷却装置39として連続
式ミキサ方式を採用すれば、撹拌羽根55によって乾燥
した土壌と水とを一層均一に混合でき、取り扱いに適し
た土壌を安定して得ることができる。As described above, when the continuous mixer system is adopted as the soil cooling device 39, the dried soil and the water can be mixed more uniformly by the stirring blade 55, and the soil suitable for handling can be stably obtained. it can.
【0038】また、図3はアスファルトプラントにアス
ファルト舗装廃材加熱用のドライヤ61を並設したタイ
プのものであり、このタイプのアスファルトプラントで
は、新規骨材を加熱するドライヤ1にて汚染土壌を浄化
処理することもできるが、アスファルト舗装廃材を加熱
するドライヤ61を利用して浄化処理することもでき
る。以下、ドライヤ61を利用して汚染土壌を浄化処理
することについて説明する。なお、図3において図1と
同一符号は、同一構成要素を示し、その説明は省略す
る。FIG. 3 shows a type in which a dryer 61 for heating waste asphalt pavement is installed in parallel in an asphalt plant. In this type of asphalt plant, a contaminated soil is purified by a dryer 1 for heating a new aggregate. Although it can be treated, it is also possible to perform purification treatment using a dryer 61 that heats asphalt pavement waste. Hereinafter, the process of purifying contaminated soil using the dryer 61 will be described. Note that, in FIG. 3, the same reference numerals as those in FIG. 1 denote the same components, and the description thereof will be omitted.
【0039】アスファルト舗装廃材加熱用のドライヤ6
1は新規骨材加熱用のドライヤ1とほぼ同様の構成をし
ており、内周部に多数の掻き上げ羽根(図示せず)を周
設した円筒状のドラム62を機台63上に回転自在に傾
斜支持し、駆動装置(図示せず)により所定の速度で回
転させるようにしており、ドラム62の一端部のホット
ホッパ64に配設したバーナ65よりドラム62内に熱
風を送り込む一方、他端部の貯蔵ビン66には排気煙道
67を連結しており、該排気煙道67途中に介在させた
排風機68にて排ガスを吸引してドラム62内を通過す
る高温ガス流を維持すると共に、サイクロン集塵機など
の集塵機69を経由させて排ガスを脱臭炉24に導いて
いる。Dryer 6 for heating asphalt pavement waste
1 has almost the same structure as the dryer 1 for heating the new aggregate, and a cylindrical drum 62 having a large number of scraping blades (not shown) around its inner circumference is rotated on the machine base 63. It is freely tilted and supported, and is rotated at a predetermined speed by a driving device (not shown). While hot air is sent into the drum 62 from a burner 65 arranged in a hot hopper 64 at one end of the drum 62, An exhaust flue 67 is connected to the storage bin 66 at the other end, and exhaust gas is sucked by an exhaust fan 68 interposed in the exhaust flue 67 to maintain a high-temperature gas flow passing through the inside of the drum 62. In addition, the exhaust gas is guided to the deodorizing furnace 24 via a dust collector 69 such as a cyclone dust collector.
【0040】そして、アスファルト舗装廃材をベルトコ
ンベヤ70を介してドラム62内へ投入し、転動流下す
る間にバーナ65からの熱風に晒して加熱して貯蔵ビン
66に貯留した後、下位の計量槽71に適宜払い出して
計量し、排出シュート72を介してプラント本体14の
ミキサ23に払い出し、新規のアスファルト混合物へ所
定比率で混入してアスファルト舗装廃材の再利用を図っ
ている。なお、図中では排出シュート72にてミキサ2
3に供給しているが、コンベヤ等により搬送しても良
い。Then, the waste asphalt pavement material is thrown into the drum 62 through the belt conveyor 70, exposed to the hot air from the burner 65 while it is rolling down and heated to be stored in the storage bin 66, and then the lower measurement is carried out. The asphalt pavement waste is reused by being dispensed to the tank 71, weighed appropriately, dispensed to the mixer 23 of the plant body 14 via the discharge chute 72, and mixed in a new asphalt mixture at a predetermined ratio. In the figure, the discharge chute 72 is used for the mixer 2
Although it is supplied to No. 3, it may be conveyed by a conveyor or the like.
【0041】また、ドライヤ61にて加熱浄化した土壌
を土壌冷却装置39に供給するために、排出シュート7
2の途中に分岐シュート73を配設しており、該分岐シ
ュート73の分岐部にはアスファルト舗装廃材か、或い
は加熱浄化した土壌かによって排出方向を振り分ける手
段として経路変更用ダンパー74を回動自在に配設して
おり、図中の実線で示すように位置した時には分岐シュ
ート73側へ、また二点鎖線で示すように位置した時に
はミキサ23側へ流れるようにしている。In order to supply the soil heated and purified by the dryer 61 to the soil cooling device 39, the discharge chute 7
A branch chute 73 is arranged in the middle of 2, and a path changing damper 74 is freely rotatable at the branch part of the branch chute 73 as a means for allocating the discharge direction depending on whether it is waste asphalt pavement material or heat-purified soil. When it is located as shown by the solid line in the figure, it flows to the branch chute 73 side, and when it is located as shown by the chain double-dashed line, it flows to the mixer 23 side.
【0042】そして、分岐シュート73先端を土壌冷却
装置39の投入ホッパ42へ連結し、浄化処理した土壌
は土壌冷却装置39へと投入するようにしている。な
お、ドライヤ61にて加熱浄化した土壌を土壌冷却装置
39に供給する手段として、排出シュート72、分岐シ
ュート73を介して供給するとしたが、何らこれに限定
するものでなく、要はドライヤ61から排出されるもの
をミキサ23と土壌冷却装置39に振り分け供給できる
構成とすれば良い。The tip of the branch chute 73 is connected to the charging hopper 42 of the soil cooling device 39 so that the purified soil is fed to the soil cooling device 39. Although the soil heated and purified by the dryer 61 is supplied to the soil cooling device 39 via the discharge chute 72 and the branch chute 73, the present invention is not limited to this, and the point is that the dryer 61 is used. What is discharged may be distributed and supplied to the mixer 23 and the soil cooling device 39.
【0043】なお、集塵機69にて捕捉したダストは、
前記したのと同様に、ダスト浄化処理装置31に供給す
るようにしており、ダスト浄化処理装置31の排気ダク
ト37は集塵機69手前の排気煙道67に連結してい
る。The dust captured by the dust collector 69 is
Similar to the above, the dust purification treatment device 31 is supplied, and the exhaust duct 37 of the dust purification treatment device 31 is connected to the exhaust flue 67 in front of the dust collector 69.
【0044】しかして、前記した装置で汚染土壌を浄化
処理する場合には、汚染土壌をベルトコンベヤ70を介
してドライヤ61に投入し、所定温度まで加熱する。こ
の加熱によって汚染土壌中の油などの揮発性汚染物質
は、揮発分離、或いは燃焼分解させられる一方、ドラム
62内を通過するガス流に乗って土壌中の揮発性汚染物
質を多く含む微粒分がドライヤ61下流へと導出され、
汚染土壌は浄化される。When the contaminated soil is purified by the above apparatus, the contaminated soil is put into the dryer 61 via the belt conveyor 70 and heated to a predetermined temperature. By this heating, volatile pollutants such as oil in the polluted soil are volatilized and separated, or decomposed by combustion, while fine particles containing a large amount of volatile pollutants in the soil are carried on the gas flow passing through the drum 62. It is led to the downstream of the dryer 61,
Contaminated soil is cleaned.
【0045】そして、ドライヤ61から導出される排ガ
スを集塵機69へ導いてダストを捕捉した後、脱臭炉2
4へと導入して炉内の高温雰囲気に晒し、排ガス中に残
る揮発性汚染物質を完全に燃焼分解して煙突10より大
気中へ放出する。After the exhaust gas discharged from the dryer 61 is guided to the dust collector 69 to capture the dust, the deodorizing furnace 2
4 is exposed to the high temperature atmosphere in the furnace, and the volatile pollutants remaining in the exhaust gas are completely combusted and decomposed and released from the chimney 10 into the atmosphere.
【0046】一方、浄化処理された土壌は、ドライヤ6
1下流の排出シュート72より適宜払い出される。この
とき、経路変更用ダンパー74は図3の実線位置へ回動
させており、排出シュート72より流下してくる土壌を
分岐シュート73を経由させて土壌冷却装置39へと投
入し、水を噴霧して適当に湿潤、冷却して取り扱いに適
した状態とする。On the other hand, the soil which has been subjected to the purification treatment is dried by a dryer 6
It is appropriately paid out from the discharge chute 72 on the downstream side. At this time, the path changing damper 74 is rotated to the position shown by the solid line in FIG. 3, and the soil flowing down from the discharge chute 72 is thrown into the soil cooling device 39 via the branch chute 73 to spray water. To obtain a suitable state for handling by appropriately wetting and cooling.
【0047】このように、アスファルトプラントにアス
ファルト舗装廃材加熱用のドライヤ61を並設したタイ
プのものであれば、新規骨材加熱用のドライヤ1に代え
てアスファルト舗装廃材加熱用のドライヤ61を利用し
て汚染土壌を浄化処理することもできる。As described above, in the case of the type in which the dryer 61 for heating the asphalt pavement waste material is arranged in parallel in the asphalt plant, the dryer 61 for heating the asphalt pavement waste material is used instead of the dryer 1 for heating the new aggregate. Then, the contaminated soil can be purified.
【0048】[0048]
【発明の効果】以上のように本発明は、アスファルトプ
ラントの骨材加熱用のドライヤを骨材加熱用と汚染土壌
加熱浄化用との兼用の加熱手段として構成すると共に、
ドライヤの排気煙道に介在させた集塵機の下流には排ガ
ス中の揮発性汚染物質を燃焼分解する脱臭炉を配設し、
汚染土壌をドライヤにて加熱浄化し、飛散する排ガス中
の汚染物質を集塵機にて捕捉するとともに、捕捉できな
かった揮発性汚染物質を脱臭炉にて燃焼分解するようし
たので、汚染土壌の浄化処理をアスファルトプラントの
設備を利用して実施でき、専用の汚染土壌の浄化処理プ
ラントを設置するよりも設備投資を抑えられ、低コスト
にて汚染土壌の浄化処理を実現できる。As described above, according to the present invention, the dryer for heating the aggregate of the asphalt plant is configured as a heating means for both heating the aggregate and heating and cleaning the contaminated soil.
A deodorizing furnace that burns and decomposes volatile pollutants in exhaust gas is installed downstream of the dust collector interposed in the exhaust flue of the dryer.
The contaminated soil is heated and purified by a dryer, and the pollutants in the scattered exhaust gas are captured by a dust collector, and the volatile pollutants that could not be captured are burned and decomposed in a deodorization furnace. Can be carried out using the equipment of the asphalt plant, and the equipment investment can be suppressed compared to the installation of a dedicated contaminated soil purification treatment plant, and the contaminated soil purification treatment can be realized at low cost.
【0049】また、集塵機にて捕捉したダストを受け入
れて微粒分中に含まれる揮発性汚染物質を燃焼分解する
ダスト浄化処理装置を配設したので、集塵機にて捕捉し
たダストも浄化処理でき、汚染土壌の浄化処理に好適な
プラントとなる。Further, since the dust purifying processing device for receiving the dust captured by the dust collector and burning and decomposing the volatile pollutants contained in the fine particles is disposed, the dust captured by the dust collector can also be purified and polluted. The plant is suitable for soil purification treatment.
【0050】また、ドライヤから排出される高温土壌を
冷却する土壌冷却装置を配設したので、高温の土壌を冷
却して取り扱いやすいやすいものとでき、汚染土壌の浄
化処理に一層好適なプラントとなる。Further, since the soil cooling device for cooling the high temperature soil discharged from the dryer is provided, the high temperature soil can be cooled to be easy to handle, and the plant is more suitable for the purification treatment of contaminated soil. .
【図1】本発明に係る汚染土壌浄化処理兼用アスファル
トプラントの一実施例を示す概略構成図である。FIG. 1 is a schematic configuration diagram showing an embodiment of an asphalt plant that also serves as a contaminated soil purification treatment according to the present invention.
【図2】図1の別の実施例を示す図である。FIG. 2 is a diagram showing another embodiment of FIG.
【図3】図1の別の実施例を示す図である。FIG. 3 is a diagram showing another embodiment of FIG.
1…ドライヤ(新規骨材加熱用) 9…集塵機
13…バケットエレベータ 14…プラント本
体
23…ミキサ 24…脱臭炉
29…分岐シュート 30…経路変更用
ダンパー
31…ダスト浄化処理装置 39…土壌冷却装
置
61…ドライヤ(アスファルト舗装廃材加熱用)
69…集塵機 72…排出シュー
ト
73…分岐シュート 74…経路変更用
ダンパー1 ... Dryer (for heating new aggregate) 9 ... Dust collector 13 ... Bucket elevator 14 ... Plant body 23 ... Mixer 24 ... Deodorizing furnace 29 ... Branch chute 30 ... Route change damper 31 ... Dust cleaning device 39 ... Soil cooling device 61 ... Dryer (for heating asphalt pavement waste) 69 ... Dust collector 72 ... Ejection chute 73 ... Branch chute 74 ... Route change damper
Claims (6)
イヤに汚染土壌を供給して加熱浄化する一方、ドライヤ
から発生する排ガスを集塵機へと導いて汚染物質を含む
微細分を捕捉するとともに、集塵機から導出される排ガ
スを脱臭炉へと導き、該脱臭炉にて排ガス中の揮発性汚
染物質を燃焼分解するようにしたことを特徴とする汚染
土壌の浄化処理方法。1. A contaminated soil is supplied to a dryer for heating aggregates of an asphalt plant for heating and purification, and at the same time, exhaust gas generated from the dryer is guided to a dust collector to capture fine particles containing pollutants and from the dust collector. A method for purifying contaminated soil, characterized in that the discharged exhaust gas is guided to a deodorizing furnace, and volatile pollutants in the exhaust gas are burned and decomposed in the deodorizing furnace.
熱し、ダスト中の揮発性汚染物質を燃焼分解するように
したことを特徴とする請求項1記載の汚染土壌の浄化処
理方法。2. The method for purifying contaminated soil according to claim 1, wherein the dust captured by the dust collector is taken out and heated to burn and decompose volatile pollutants in the dust.
装置へと導いて所定温度まで冷却するようにしたことを
特徴とする請求項1又は2記載の汚染土壌の浄化処理方
法。3. The method for purifying contaminated soil according to claim 1 or 2, wherein the soil heated to a high temperature is guided to a soil cooling device to be cooled to a predetermined temperature.
イヤを骨材加熱用と汚染土壌加熱浄化用との兼用の加熱
手段として構成すると共に、ドライヤの排気煙道に介在
させた集塵機の下流には排ガス中の揮発性汚染物質を燃
焼分解する脱臭炉を配設したことを特徴とする汚染土壌
浄化処理兼用アスファルトプラント。4. A dryer for heating aggregates of an asphalt plant is constituted as a heating means for both heating aggregates and for cleaning and cleaning contaminated soil, and is provided downstream of a dust collector interposed in an exhaust flue of the dryer. An asphalt plant for cleaning and treating contaminated soil, comprising a deodorizing furnace for burning and decomposing volatile pollutants in exhaust gas.
スト中に含まれる揮発性汚染物質を燃焼分解するダスト
浄化処理装置を配設したことを特徴とする請求項4記載
の汚染土壌浄化処理兼用アスファルトプラント。5. A dust purification treatment device for accepting dust captured by a dust collector and burning and decomposing volatile pollutants contained in the dust is also provided. Asphalt plant.
て所定温度まで冷却する土壌冷却装置を配設したことを
特徴とする請求項4又は5記載の汚染土壌浄化処理兼用
アスファルトプラント。6. The asphalt plant for contaminated soil cleaning and combined use according to claim 4 or 5, further comprising a soil cooling device for receiving the heated and purified soil and cooling it to a predetermined temperature.
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JP2001272814A JP5129913B2 (en) | 2001-09-10 | 2001-09-10 | Contaminated soil purification method and contaminated soil purification asphalt plant |
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JP2001272814A JP5129913B2 (en) | 2001-09-10 | 2001-09-10 | Contaminated soil purification method and contaminated soil purification asphalt plant |
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Cited By (6)
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JP2007070139A (en) * | 2005-09-05 | 2007-03-22 | Nikko Co Ltd | Method for thermal regeneration treatment of waste gypsum by utilizing asphalt plant |
JP2008073691A (en) * | 2002-03-15 | 2008-04-03 | Kajima Corp | Oil-contaminated soil treatment apparatus convertible from existing asphalt plant |
JP2014214482A (en) * | 2013-04-25 | 2014-11-17 | 日工株式会社 | Dustproof device and dustproof method of asphalt plant |
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2001
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JP2008073691A (en) * | 2002-03-15 | 2008-04-03 | Kajima Corp | Oil-contaminated soil treatment apparatus convertible from existing asphalt plant |
JP4577728B2 (en) * | 2002-03-15 | 2010-11-10 | 鹿島建設株式会社 | Oil-contaminated soil treatment equipment combined with existing asphalt plant |
JP2007070139A (en) * | 2005-09-05 | 2007-03-22 | Nikko Co Ltd | Method for thermal regeneration treatment of waste gypsum by utilizing asphalt plant |
JP2014214482A (en) * | 2013-04-25 | 2014-11-17 | 日工株式会社 | Dustproof device and dustproof method of asphalt plant |
CN109621570A (en) * | 2019-01-24 | 2019-04-16 | 福建铁拓机械有限公司 | A kind of asphalt mixture heat regeneration exhaust gas processing device and method |
CN110042729A (en) * | 2019-05-20 | 2019-07-23 | 江苏徐工工程机械研究院有限公司 | Pitch mixes and stirs system and Asphalt smoke purification method |
CN110042729B (en) * | 2019-05-20 | 2024-02-06 | 江苏徐工工程机械研究院有限公司 | Asphalt mixing system and asphalt smoke purifying method |
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