JP2020033787A - Asphalt plant and asphalt mixture manufacturing method therefor - Google Patents

Asphalt plant and asphalt mixture manufacturing method therefor Download PDF

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JP2020033787A
JP2020033787A JP2018162231A JP2018162231A JP2020033787A JP 2020033787 A JP2020033787 A JP 2020033787A JP 2018162231 A JP2018162231 A JP 2018162231A JP 2018162231 A JP2018162231 A JP 2018162231A JP 2020033787 A JP2020033787 A JP 2020033787A
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asphalt
waste material
oil tank
molten
heating
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JP7049744B2 (en
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昌宏 神尾
Masahiro Kamio
昌宏 神尾
健児 山本
Kenji Yamamoto
健児 山本
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Nikko Co Ltd
Nikko KK
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Nikko KK
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Abstract

To provide an asphalt plant and asphalt mixture manufacturing method therefor that can reduce noise and dust when crushing a waste material mass.SOLUTION: To be installed is a molten asphalt heating and crushing facility 22, comprising: an asphalt oil tank 24 for storing molten asphalt on a side ground of a plant body 4; heating means 25 for heating the molten asphalt in the asphalt oil tank 24 to a prescribed temperature; scraping means 26 for continuously scraping waste material to be charged into the asphalt oil tank 24; and oil draining means 27 for draining molten asphalt from scraped waste material. The waste material mass is then immersed in the molten asphalt in the asphalt oil tank 24, and the waste material mass is crushed by weakening the bonding force of the asphalt attached to the waste material mass while heating. The heated crushed waste material is used as the asphalt mixture.SELECTED DRAWING: Figure 1

Description

本発明は、アスファルト混合物を製造するアスファルトプラントに関し、特に道路工事などによって掘り起こされる廃材塊を高温の溶融アスファルトを利用して加熱・解砕してアスファルト混合物の素材として使用するアスファルトプラント及びそのアスファルト混合物製造方法に関する。   The present invention relates to an asphalt plant for producing an asphalt mixture, in particular, an asphalt plant using a high-temperature molten asphalt to heat and disintegrate a waste material mass excavated by road construction and the like to use the asphalt mixture as a material for the asphalt mixture, and the asphalt mixture It relates to a manufacturing method.

従来、道路工事等により掘り起こされたアスファルト舗装廃材(以下「廃材」という)の再利用を図るため、先ず、廃材塊をジョークラッシャ等の一次破砕機にて粗破砕し、次いでインパクトクラッシャ等の二次破砕機にて所定粒径、例えば約13mmアンダー程度に細破砕している。   Conventionally, in order to reuse asphalt pavement waste material (hereinafter referred to as “waste material”) excavated by road construction or the like, first, the waste material lump is coarsely crushed by a primary crusher such as a jaw crusher, and then a secondary crusher such as an impact crusher is used. It is finely crushed by a next crusher to a predetermined particle size, for example, about 13 mm under.

細破砕した廃材は、例えば、特許文献1に開示されるように、アスファルトプラントの廃材ドライヤにて約160℃程度に加熱処理して廃材貯蔵ビンに貯蔵する一方、骨材ドライヤにて同様に加熱処理した骨材をプラント本体の振動篩にて粒径別に篩い分けて下位の骨材貯蔵ビンに一時貯蔵する。   For example, as disclosed in Patent Document 1, the finely crushed waste material is heat-treated at about 160 ° C. in a waste material dryer of an asphalt plant and stored in a waste material storage bin, and is similarly heated in an aggregate dryer. The treated aggregate is sieved by a particle size using a vibrating sieve of the plant body and temporarily stored in a lower aggregate storage bin.

そして、廃材を混入するアスファルト混合物を製造するときには、前記廃材貯蔵ビン及び骨材貯蔵ビンから払い出される廃材及び骨材を所定量ずつミキサ内に投入し、かつ所定量の溶融アスファルト、石粉を添加混合して所望配合のアスファルト混合物を製造している。   When producing an asphalt mixture containing waste material, a predetermined amount of waste material and aggregate discharged from the waste material storage bin and the aggregate storage bin are charged into a mixer, and a predetermined amount of molten asphalt and stone powder are added and mixed. As a result, an asphalt mixture having a desired composition is produced.

特開2015−227598号公報JP-A-2005-227598

しかしながら、前記のように、道路工事現場等から回収してきた廃材塊をドライヤでの加熱処理の前処理として各種破砕機にて所定粒径以下に破砕処理するにあたり、それを例えば都市部近郊のアスファルト混合物製造工場の敷地内で行う場合、特にインパクトクラッシャによる細破砕に伴って発生する騒音や粉塵は周辺環境上問題となる可能性がある。   However, as described above, when crushing a lump of waste material collected from a road construction site or the like to a predetermined particle size or less with various crushers as a pre-treatment of a heating treatment with a dryer, the crushing is performed, for example, on asphalt near an urban area. When performed on the premises of the mixture manufacturing plant, noise and dust generated by the fine crushing by the impact crusher may be a problem on the surrounding environment.

本発明は上記の点に鑑み、廃材塊を破砕処理する際の騒音や粉塵を軽減できるアスファルトプラント及びそのアスファルト混合物製造方法を提供することを課題とする。   In view of the above, an object of the present invention is to provide an asphalt plant and a method for producing an asphalt mixture thereof, which can reduce noise and dust when crushing a waste lump.

上記課題を解決するために、本発明者は鋭意検討を重ね、粗破砕した廃材塊を約160℃程度に加熱した溶融アスファルト中に浸漬させるテストを試行した結果、約5分程度で廃材塊中のアスファルト分の結合力を弱めてバラバラに解砕できることを確認した。そして、このテスト結果によれば、廃材を高温の溶融アスファルトに浸漬させることは、廃材の解砕処理手段として十分に有効であり、かつ従来の破砕機による破砕処理と比較して騒音や粉塵を軽減できると考えた。また、廃材の解砕処理と併せて加熱処理も同時に行える利点もあり、更に溶融アスファルトが廃材表面に付着残留していてもアスファルト混合物を製造する上では支障がないと考え、本発明に至ったものである。   In order to solve the above problems, the present inventors have conducted intensive studies and conducted a test in which a roughly crushed waste material lump was immersed in molten asphalt heated to about 160 ° C., and as a result, the waste material lump It has been confirmed that the asphalt can be disintegrated by weakening the bonding strength of the asphalt. According to the test results, immersing waste material in high-temperature molten asphalt is sufficiently effective as a means for crushing waste material, and reduces noise and dust compared to crushing treatment using a conventional crusher. I thought it could be reduced. In addition, there is an advantage that the heat treatment can be performed simultaneously with the disintegration treatment of the waste material, and furthermore, it is considered that there is no problem in producing the asphalt mixture even if the molten asphalt remains attached to the surface of the waste material, and the present invention has been achieved. Things.

即ち、本発明に係る請求項1記載のアスファルトプラントでは、骨材ドライヤにて加熱処理した骨材を受け入れる振動篩、骨材貯蔵ビン、骨材計量槽及びミキサを階層状に組み上げて成るプラント本体の側部地上に、溶融アスファルトを貯留するアスファルト油槽と、該アスファルト油槽内の溶融アスファルトを所定温度に加熱する加熱手段と、前記アスファルト油槽内に投入される廃材を連続的に掻き出す掻き出し手段と、掻き出した廃材から溶融アスファルトを油切りする油切り手段とを備えた溶融アスファルト加熱解砕設備を設置し、該溶融アスファルト加熱解砕設備のアスファルト油槽内の溶融アスファルトに廃材塊を浸漬して加熱しながら廃材塊に付着するアスファルトの結合力を弱めて廃材塊を解砕し、この解砕した加熱廃材をアスファルト混合物の素材として使用する構成としたことを特徴としている。   That is, in the asphalt plant according to claim 1 of the present invention, a plant main body comprising a vibrating sieve, an aggregate storage bin, an aggregate measuring tank, and a mixer that receives aggregate heated by an aggregate dryer is assembled in a hierarchical manner. On the side surface of the asphalt oil tank for storing molten asphalt, heating means for heating the molten asphalt in the asphalt oil tank to a predetermined temperature, and scraping means for continuously scraping waste materials to be put into the asphalt oil tank, A molten asphalt heating and disintegrating equipment equipped with oil draining means for draining the molten asphalt from the scraped waste material is installed, and the waste asphalt is immersed in the molten asphalt in the asphalt oil tank of the molten asphalt heating and disintegrating equipment and heated. While reducing the asphalt bonding force attached to the waste mass to break the waste mass, It is characterized in that a structure to be used as material for asphalt mixtures.

また、本発明に係る請求項2記載のアスファルトプラントでは、前記加熱手段として、バーナを備えた熱風発生炉と、該熱風発生炉の熱風と前記アスファルト油槽内の溶融アスファルトとを熱交換して溶融アスファルトを所定温度に加熱する熱交換器と、前記アスファルト油槽から前記熱交換器に溶融アスファルトを循環供給する循環回路とを備えたことを特徴としている。   Further, in the asphalt plant according to claim 2 of the present invention, as the heating means, a hot air generating furnace provided with a burner, and heat exchange between hot air of the hot air generating furnace and molten asphalt in the asphalt oil tank are melted. A heat exchanger for heating asphalt to a predetermined temperature, and a circulation circuit for circulating molten asphalt from the asphalt oil tank to the heat exchanger are provided.

また、本発明に係る請求項3記載のアスファルトプラントでは、前記アスファルト油槽は側壁面の一部を傾斜構造とした略舟形状とすると共に、前記掻き出し手段は前記アスファルト油槽の底面から傾斜構造とした前記側壁面に沿って配置したスクレーパコンベヤとしたことを特徴としている。   Further, in the asphalt plant according to claim 3 of the present invention, the asphalt oil tank has a substantially boat shape in which a part of a side wall surface is inclined, and the scraping means has an inclined structure from the bottom of the asphalt oil tank. The scraper conveyor is arranged along the side wall surface.

また、本発明に係る請求項4記載のアスファルトプラントでは、前記アスファルト油槽内にて発生する臭気性ガスを前記熱風発生炉に導出して燃焼分解させる臭気ガス導出管を備えたことを特徴としている。   Further, the asphalt plant according to claim 4 of the present invention is characterized by comprising an odor gas discharge pipe for discharging an odorous gas generated in the asphalt oil tank to the hot blast generating furnace to burn and decompose. .

本発明に係る請求項5記載のアスファルトプラントのアスファルト混合物製造方法では、道路工事によって掘り起こされる廃材塊を粗破砕し、粗破砕後の廃材塊を溶融アスファルトを貯留するアスファルト油槽内に投入し、溶融アスファルトに所定時間浸漬して加熱しながら廃材塊に付着するアスファルトの結合力を弱めて廃材塊を解砕し、この解砕した廃材をアスファルト油槽から連続的に掻き出し、廃材に付着する溶融アスファルトを油切りした後、アスファルト混合物の素材として使用することを特徴としている。   In the method for producing an asphalt mixture of an asphalt plant according to claim 5 according to the present invention, a lump of waste material dug up by road construction is roughly crushed, and the lump of waste material after the coarse crushing is put into an asphalt oil tank for storing molten asphalt and melted. While being immersed in asphalt for a predetermined period of time and heating it, the bonding force of the asphalt adhering to the waste material mass is weakened to crush the waste material mass, and the crushed waste material is continuously scraped out of the asphalt oil tank to remove molten asphalt adhering to the waste material. It is characterized by being used as a material for asphalt mixture after oil draining.

本発明に係る請求項1記載のアスファルトプラントによれば、プラント本体の側部地上に、溶融アスファルトを所定温度に維持する加熱手段を有するアスファルト油槽、該アスファルト油槽内の廃材を掻き出す掻き出し手段、及び溶融アスファルトを油切りする油切り手段とを備えた溶融アスファルト加熱解砕設備を設置したので、該溶融アスファルト加熱解砕設備のアスファルト油槽内の溶融アスファルトに廃材塊を浸漬して加熱しながら廃材塊に付着するアスファルトの結合力を弱めて廃材塊を解砕することができ、この解砕した加熱廃材をプラント本体に搬送してアスファルト混合物の素材として使用すれば、騒音や粉塵をあまり発生させることはなく、また加熱処理も同時に行えて従来設置していた廃材ドライヤも不要とできる。   According to the asphalt plant according to claim 1 of the present invention, an asphalt oil tank having a heating means for maintaining the molten asphalt at a predetermined temperature on the side surface of the plant body, a scraping means for scraping waste materials in the asphalt oil tank, and Since the molten asphalt heating and crushing equipment equipped with oil draining means for draining the molten asphalt was installed, the waste material lumps were immersed in the molten asphalt in the asphalt oil tank of the molten asphalt heating and crushing equipment and heated, and the waste material lumps were heated. Waste material mass can be disintegrated by weakening the binding force of asphalt adhering to the surface.If this disintegrated heated waste material is transported to the plant itself and used as a material for asphalt mixture, noise and dust will be generated too much. In addition, the heat treatment can be performed at the same time, and the waste material dryer conventionally installed can be eliminated.

また、本発明に係る請求項2記載のアスファルトプラントによれば、前記加熱手段として、バーナを備えた熱風発生炉と、該熱風発生炉の熱風と前記アスファルト油槽内の溶融アスファルトとを熱交換して溶融アスファルトを所定温度に加熱する熱交換器と、前記アスファルト油槽から前記熱交換器に溶融アスファルトを循環供給する循環回路とを備えたので、アスファルト油槽内の溶融アスファルトを所定温度に安定して維持制御できる。   Further, according to the asphalt plant according to claim 2 of the present invention, as the heating means, a hot air generating furnace provided with a burner, and heat exchange between hot air of the hot air generating furnace and molten asphalt in the asphalt oil tank. A heat exchanger for heating the molten asphalt to a predetermined temperature, and a circulation circuit for circulating the molten asphalt from the asphalt oil tank to the heat exchanger, so that the molten asphalt in the asphalt oil tank is stably maintained at a predetermined temperature. Can maintain and control.

また、本発明に係る請求項3記載のアスファルトプラントによれば、前記アスファルト油槽は側壁面の一部を傾斜構造とした略舟形状とすると共に、前記掻き出し手段は前記アスファルト油槽の底面から傾斜構造とした前記側壁面に沿って配置したスクレーパコンベヤとしたので、アスファルト油槽内の廃材をスクレーパコンベヤにて加熱しながら連続的に搬送できると同時に、加熱によってアスファルトの結合力を弱めた廃材塊を掻き出すことで廃材塊を一層解砕できる。   Further, according to the asphalt plant according to claim 3 of the present invention, the asphalt oil tank has a substantially boat shape in which a part of a side wall surface is inclined, and the scraping means has an inclined structure from the bottom of the asphalt oil tank. Since the scraper conveyor is arranged along the side wall surface, the waste material in the asphalt oil tank can be continuously conveyed while being heated by the scraper conveyor, and at the same time, scraping of the waste material mass having weakened the asphalt bonding force by heating is performed. Thereby, the waste material block can be further disintegrated.

また、本発明に係る請求項4記載のアスファルトプラントによれば、前記アスファルト油槽内にて発生する臭気性ガスを前記熱風発生炉に導出して燃焼分解させる臭気ガス導出管を備えたので、臭気性ガスを熱風発生炉内にて燃焼分解できると共に、臭気性ガスの燃焼エネルギーも有効利用できる。   Further, according to the asphalt plant according to claim 4 of the present invention, since the odorous gas generated in the asphalt oil tank is provided to the hot air generating furnace, and the odorous gas outlet pipe is provided for combustion decomposition, the odorous gas outlet pipe is provided. The odorous gas can be burned and decomposed in the hot air generating furnace, and the combustion energy of the odorous gas can be effectively used.

また、本発明に係る請求項5記載のアスファルト混合物製造方法によれば、道路工事によって掘り起こされる廃材塊を粗破砕し、粗破砕後の廃材塊を溶融アスファルトを貯留するアスファルト油槽内に投入し、溶融アスファルトに所定時間浸漬して加熱しながら廃材塊に付着するアスファルトの結合力を弱めて廃材塊を解砕し、この解砕した廃材をアスファルト油槽から連続的に掻き出し、廃材に付着する溶融アスファルトを油切りした後、アスファルト混合物の素材として使用するので、廃材塊を粗破砕するジョークラッシャ等の一次破砕機の衝撃音も比較的小さく、また粗破砕後の細破砕は高温の溶融アスファルトに浸漬して加熱・解砕処理するので騒音や粉塵をあまり発生させることはない。また加熱処理も同時に行えて従来設置していた廃材ドライヤも不要とできる。   Further, according to the asphalt mixture production method according to claim 5 of the present invention, coarsely crushes a waste material mass dug by road construction, throws the roughly crushed waste material mass into an asphalt oil tank that stores molten asphalt, While being immersed in molten asphalt for a predetermined period of time and heating it, the bonding force of asphalt adhering to the waste material mass is weakened to break up the waste material mass, and the crushed waste material is continuously scraped out from the asphalt oil tank, and the molten asphalt attached to the waste material After the oil is drained, it is used as a material for the asphalt mixture, so the impact sound of a primary crusher such as a jaw crusher that coarsely crushes the waste material lump is relatively low, and the fine crushing after coarse crushing is immersed in hot molten asphalt The heating and crushing process does not generate much noise or dust. In addition, heat treatment can be performed at the same time, and the waste material dryer that has been conventionally installed can be eliminated.

本発明に係るアスファルトプラントの概略構成図である。It is a schematic structure figure of the asphalt plant concerning the present invention. 溶融アスファルト加熱解砕設備の詳細図である。It is a detailed view of a melting and asphalt heating and crushing facility.

本発明に係るアスファルトプラントにあっては、骨材ドライヤにて加熱処理した骨材を受け入れる振動篩、骨材貯蔵ビン、骨材計量槽及びミキサを階層状に組み上げて成るプラント本体の側部地上に、廃材塊を高温の溶融アスファルトに浸漬して加熱・解砕処理する溶融アスファルト加熱解砕設備を設置する。前記溶融アスファルトの温度としては、廃材中のアスファルト分が軟化溶融する所定温度以上とし、好ましくはアスファルト混合物を製造する際の廃材の加熱処理温度程度、例えば約160℃程度とする。   In the asphalt plant according to the present invention, a vibrating sieve for receiving aggregate heated by an aggregate dryer, an aggregate storage bin, an aggregate measuring tank, and a mixer are hierarchically assembled on a side surface of a plant body. Then, a hot asphalt heating and crushing equipment for immersing the waste material mass in hot molten asphalt and heating and crushing it is installed. The temperature of the molten asphalt is equal to or higher than a predetermined temperature at which the asphalt component in the waste material is softened and melted. Preferably, the temperature is about the heat treatment temperature of the waste material when producing the asphalt mixture, for example, about 160 ° C.

また、前記溶融アスファルト加熱解砕設備は、溶融アスファルトを貯留するアスファルト油槽と、該アスファルト油槽内の溶融アスファルトを所定温度に加熱する加熱手段と、前記アスファルト油槽内に投入される廃材を連続的に掻き出す掻き出し手段と、掻き出した廃材から溶融アスファルトを油切りする油切り手段とを備える。   Further, the molten asphalt heating and crushing equipment includes an asphalt oil tank that stores the molten asphalt, a heating unit that heats the molten asphalt in the asphalt oil tank to a predetermined temperature, and a waste material that is charged into the asphalt oil tank. A scraping means for scraping and an oil draining means for draining molten asphalt from scraped waste material are provided.

また、前記加熱手段として、バーナを備えた熱風発生炉と、該熱風発生炉の熱風と前記アスファルト油槽内の溶融アスファルトとを熱交換して溶融アスファルトを所定温度に加熱する熱交換器と、前記アスファルト油槽から前記熱交換器に溶融アスファルトを循環供給する循環回路とを備える。なお、前記加熱手段には、例えば温度調節の容易な電気ヒータ等も好適に採用できるが、バーナを採用すれば、高温の溶融アスファルト表面から揮発する臭気性ガスを前記熱風発生炉にて燃焼分解処理することができて好適である。   Further, as the heating means, a hot-air generating furnace equipped with a burner, a heat exchanger that heat-exchanges hot air of the hot-air generating furnace with molten asphalt in the asphalt oil tank to heat the molten asphalt to a predetermined temperature, A circulation circuit for circulating and supplying molten asphalt from the asphalt oil tank to the heat exchanger. As the heating means, for example, an electric heater or the like whose temperature can be easily adjusted can be suitably employed. However, if a burner is employed, the odorous gas volatilized from the surface of the high-temperature molten asphalt is burned and decomposed by the hot air generating furnace. It is suitable because it can be processed.

更に、前記アスファルト油槽は側壁面の一部を傾斜構造とした略舟形状とすると共に、前記掻き出し手段は前記アスファルト油槽の底面から傾斜構造とした前記側壁面に沿って配置したスクレーパコンベヤとする。該スクレーパコンベヤは、前記アスファルト油槽内の廃材を連続的に搬送すると同時に、掻き出し時にアスファルトの結合力が弱まった廃材塊を解砕する。また、スクレーパにて掻き出した廃材から付着するアスファルトを油切りする、例えば振動篩、回転篩等の油切り手段を備える。   Further, the asphalt oil tank has a substantially boat shape in which a part of a side wall surface is inclined, and the scraping means is a scraper conveyor arranged along the inclined side wall surface from the bottom surface of the asphalt oil tank. The scraper conveyor continuously conveys the waste material in the asphalt oil tank, and at the same time, breaks up the waste material mass in which the asphalt bonding force is weakened during scraping. In addition, an oil draining means such as a vibrating sieve or a rotary sieve is provided for draining asphalt adhering from waste material scraped out by a scraper.

更にまた、前記アスファルト油槽にて発生する臭気性ガスを前記熱風発生炉に導出して燃焼分解させる臭気ガス導出管を備える。前記アスファルト油槽内にて発生する臭気性ガスは前記臭気ガス導出管を通して熱風発生炉へと導かれ、高温に晒されて燃焼分解される。   Still further, there is provided an odor gas lead-out pipe for leading the odor gas generated in the asphalt oil tank to the hot blast generating furnace to burn and decompose. The odorous gas generated in the asphalt oil tank is guided to a hot air generating furnace through the odor gas outlet pipe, and is exposed to high temperature and decomposed by combustion.

そして、上記構成のアスファルトプラントにて、廃材を混入したアスファルト混合物を製造するときには、先ず、前記溶融アスファルト加熱解砕設備の溶融アスファルトを少なくとも廃材中のアスファルト分が軟化溶融する所定温度以上に加熱し、次いでジョークラッシャ等の一次破砕機にて粗破砕した廃材塊を前記溶融アスファルト加熱解砕設備の溶融アスファルト中に投入し、所定時間浸漬させて廃材塊に付着するアスファルトの結合力を弱めて廃材塊を解砕する。そして、この解砕した廃材をアスファルト油槽から連続的に掻き出し、廃材に付着する溶融アスファルトを油切りした後、廃材貯蔵ビンに貯蔵してアスファルト混合物の素材として使用する。   And, in the asphalt plant having the above configuration, when producing an asphalt mixture mixed with waste material, first, the molten asphalt of the molten asphalt heating and crushing equipment is heated to a predetermined temperature or more at least asphalt component in the waste material is softened and melted. Then, the waste material mass roughly crushed by a primary crusher such as a jaw crusher is put into the molten asphalt of the molten asphalt heating and crushing equipment, and immersed for a predetermined time to weaken the asphalt bonding force attached to the waste material mass to reduce waste material. Crush the mass. Then, the crushed waste material is continuously scraped out from the asphalt oil tank, the molten asphalt adhering to the waste material is drained, and then stored in a waste material storage bin to be used as a raw material of the asphalt mixture.

このように、溶融アスファルトに浸漬して加熱しながら廃材塊に付着するアスファルトの結合力を弱めて廃材塊を解砕してアスファルト混合物の素材として使用するので、騒音や粉塵をあまり発生させることはなく、加熱処理も同時に行えて従来設置していた廃材ドライヤも不要となる。また、加熱・解砕処理した廃材表面には油切り処理後も溶融アスファルトが幾らか付着残留するが、その付着量を考慮した上で配合に見合った新規の溶融アスファルトを所定量添加混合することで製品となるアスファルト混合物のアスファルト量に何ら支障はなく、また加熱新規骨材の温度や廃材混入量を調整することでアスファルト混合物の温度も所望の温度に調製できる。   As described above, since the asphalt adhering to the waste material mass is weakened while being immersed in the molten asphalt and heated, the waste material mass is crushed and used as the material of the asphalt mixture, so that noise and dust are not generated much. In addition, heat treatment can be performed at the same time, and a waste material dryer that has been conventionally installed becomes unnecessary. In addition, some molten asphalt remains on the surface of the waste material that has been heated and disintegrated, even after oil draining, and a predetermined amount of new molten asphalt that matches the formulation should be added and mixed in consideration of the amount of adhesion. There is no problem with the amount of asphalt in the asphalt mixture to be a product, and the temperature of the asphalt mixture can be adjusted to a desired temperature by adjusting the temperature of the heated new aggregate and the amount of waste material mixed.

以下、本発明の一実施例を図面に基づいて説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

図中の1は、道路舗装材であるアスファルト混合物を製造するアスファルトプラントであって、骨材を加熱処理する骨材ドライヤ2と、該骨材ドライヤ2にて加熱処理した骨材を送り出す垂直搬送装置であるバケットエレベータ3と、該バケットエレベータ3にて送り出した骨材を篩い分けて貯蔵・計量し、溶融アスファルト等を添加混合するプラント本体4と、該プラント本体4の側部に備える廃材貯蔵ビン5及び廃材計量槽6等を備えている。   Reference numeral 1 in the figure denotes an asphalt plant for producing an asphalt mixture as a road pavement material, and an aggregate dryer 2 for heat-treating the aggregate and a vertical conveyance for sending out the aggregate heated by the aggregate dryer 2. A bucket elevator 3 as a device, a plant body 4 for sieving and storing and measuring the aggregate sent out by the bucket elevator 3, and adding and mixing molten asphalt and the like; and a waste material storage provided on a side portion of the plant body 4 A bin 5 and a waste material measuring tank 6 are provided.

前記骨材ドライヤ2は、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7を基台8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。また、前記ドラム7一端部のホットホッパ9には熱風供給用のバーナ10を備える一方、ドラム7他端部のコールドホッパ11には各種粒径の骨材をドラム7内に供給する骨材投入コンベヤ12を備えている。   The aggregate dryer 2 rotatably inclines and supports a cylindrical drum 7 having a large number of scraping blades (not shown) provided on the inner periphery thereof on a base 8, and a driving device (not shown). To rotate at a predetermined speed. The hot hopper 9 at one end of the drum 7 is provided with a burner 10 for supplying hot air, while the cold hopper 11 at the other end of the drum 7 is used for supplying aggregate having various particle sizes into the drum 7. A conveyor 12 is provided.

また、前記骨材ドライヤ2によって所定温度に加熱処理後、前記バケットエレベータ3にて持ち上げた骨材を受け入れて篩い分ける振動篩13と、該振動篩13にて篩い分けた骨材を粒径別に貯蔵する骨材貯蔵ビン14と、該骨材貯蔵ビン14より払い出される各粒径の骨材を累積計量する骨材計量槽15と、アスファルトタンク16aより供給ポンプ17を具備したアスファルト供給配管18を介して供給される溶融アスファルトを計量するアスファルト計量槽19と、前記各計量槽にて所定量ずつ計量した各種材料を混合調整するミキサ20とを、高架台21上に階層状に組み上げてプラント本体4を構成している。   Further, after heat treatment to a predetermined temperature by the aggregate dryer 2, a vibrating sieve 13 for receiving and sieving the aggregate lifted by the bucket elevator 3 and an aggregate sieved by the vibrating sieve 13 are classified by particle size. Aggregate storage bin 14 for storage, aggregate weighing tank 15 for accumulating and weighing aggregate of each particle diameter discharged from aggregate storage bin 14, and asphalt supply pipe 18 provided with supply pump 17 from asphalt tank 16a. The asphalt measuring tank 19 for measuring the molten asphalt supplied through the mixer, and the mixer 20 for mixing and adjusting various materials measured by a predetermined amount in each of the measuring tanks are assembled on an elevated platform 21 in a hierarchical manner to form a plant body. 4.

前記プラント本体4の側部に備える前記廃材貯蔵ビン5及び廃材計量槽6は、前記同様に、高架台21上に階層状に組み上げており、下位側の廃材計量槽6は前記骨材計量槽15と並べて前記ミキサ20の直上に配置し、廃材を混入したアスファルト混合物を製造する際には、骨材の一部に代えて前記廃材貯蔵ビン5からも所定量の廃材を前記廃材計量槽6を経由して前記ミキサ20へ払い出して混合調整するようにしている。   The waste material storage bin 5 and the waste material measuring tank 6 provided on the side of the plant body 4 are assembled in a hierarchical manner on the elevated platform 21 in the same manner as described above, and the lower waste material measuring tank 6 is the aggregate measuring tank. When the asphalt mixture containing the waste material is manufactured by arranging the waste material in the waste material storage bin 5 instead of a part of the aggregate, a predetermined amount of the waste material is disposed in the waste material measuring tank 6 in parallel with the mixer 20. Through the mixer 20 for mixing and adjustment.

また、前記アスファルトプラント1の側部地上に、廃材塊を高温の溶融アスファルトに浸漬して加熱・解砕処理する溶融アスファルト加熱解砕設備22を設置し、該溶融アスファルト加熱解砕設備22にて加熱・解砕処理した廃材を廃材貯蔵ビン5に搬送する垂直搬送装置であるバケットエレベータ23を備えている。なお、前記垂直搬送装置として、バケットエレベータに代えてスキップエレベータ等も採用できるが、臭気性を有する溶融アスファルトが付着した廃材を搬送することを考慮すると、比較的密閉性の高いバケットエレベータを採用した方が周辺環境上好ましい。   Further, on the side ground of the asphalt plant 1, a molten asphalt heating and crushing facility 22 for immersing the waste material mass in high-temperature molten asphalt and performing heating and crushing treatment is installed. A bucket elevator 23 is provided as a vertical transport device that transports the heated and crushed waste material to the waste material storage bin 5. Note that, as the vertical transport device, a skip elevator or the like can be used instead of the bucket elevator, but in consideration of transporting waste material to which molten asphalt having odor has adhered, a bucket elevator having a relatively high airtightness is used. Is preferable in the surrounding environment.

前記溶融アスファルト加熱解砕設備22は、溶融アスファルトを貯留するアスファルト油槽24と、該アスファルト油槽24内の溶融アスファルトを所定温度に加熱する加熱手段であるバーナ25と、前記アスファルト油槽24内の溶融アスファルトに浸漬して加熱・解砕処理した廃材をアスファルト油槽24内底部から連続的に掻き出すスクレーパコンベヤ26と、該スクレーパコンベヤ26にて掻き出した廃材からその表面に付着する溶融アスファルトを油切りする油切り手段である振動篩27とを主体に備えて成り、廃材を連続的に加熱・解砕処理可能な構成としている。   The molten asphalt heating and crushing equipment 22 includes an asphalt oil tank 24 that stores molten asphalt, a burner 25 that is a heating unit that heats the molten asphalt in the asphalt oil tank 24 to a predetermined temperature, and a molten asphalt in the asphalt oil tank 24. Conveyor 26 for continuously scraping waste materials heated and crushed by immersion in the asphalt oil tank 24, and an oil drainer for removing molten asphalt adhering to the surface from the waste materials scraped by the scraper conveyor 26. A vibrating sieve 27 as a means is mainly provided, and the waste material is configured to be continuously heated and crushed.

前記アスファルト油槽24は、図2に示すように、側壁面の一部を傾斜構造とした略舟形状に形成しており、その外周壁面を保温材(図示せず)で被覆していると共に、その上部開放部は溶融アスファルトから揮発する臭気性ガスの飛散を抑制し、かつ保温性を高めるために天板28で閉鎖している。また、前記アスファルト油槽24の上流側(廃材投入側)と下流側(廃材排出側)の天板28の一部を切り欠き、それぞれ廃材投入口29と、廃材排出口30とを設け、前記廃材投入口29の上位には粗破砕した廃材塊の投入ホッパ31と、該投入ホッパ31から切り出される廃材塊をアスファルト油槽24内に貯留した溶融アスファルトへ搬送・投入する投入コンベヤ32を備えている一方、前記廃材排出口30の下流側には油切り用の前記振動篩27を配置している。   As shown in FIG. 2, the asphalt oil tank 24 is formed in a substantially boat shape with a part of the side wall surface inclined, and the outer peripheral wall surface is covered with a heat insulating material (not shown). The upper opening is closed by a top plate 28 to suppress the odorous gas volatilized from the molten asphalt from scattering and to enhance the heat retention. Further, a part of the top plate 28 on the upstream side (the waste material input side) and the downstream side (the waste material discharge side) of the asphalt oil tank 24 is cut out, and a waste material input port 29 and a waste material discharge port 30 are provided, respectively. On the upper side of the charging port 29, there is provided a charging hopper 31 for the roughly crushed waste material mass and a charging conveyor 32 for conveying and charging the waste material mass cut out from the charging hopper 31 to the molten asphalt stored in the asphalt oil tank 24. On the downstream side of the waste material discharge port 30, the vibrating sieve 27 for oil drainage is disposed.

前記スクレーパコンベヤ26は、略舟形状の前記アスファルト油槽24内の底面から傾斜構造とした側壁面に沿わせて略ヘ字形状に折曲して配置していると共に、その搬送端部(図2中の左端部)は前記廃材排出口30よりアスファルト油槽24の外部へと突出させており、前記アスファルト油槽24内の底部に沈降した廃材を前記スクレーパコンベヤ26の搬送面に突設した複数のスクレーパ部材26aにて引っ掛けながら所定時間を掛けて下流側(図2中の左側)へと搬送し、前記廃材排出口30よりアスファルト油槽24外部へと連続的に掻き出し、その下位(廃材の落下位置)に配置した前記振動篩27の篩網(図示せず)上に落下投入させる構成としている。   The scraper conveyor 26 is disposed in a substantially boat-shaped asphalt oil tank 24 by being bent in a substantially O-shape along the inclined side wall surface from the bottom surface in the asphalt oil tank 24, and has a transport end (FIG. 2). The left end of the scraper projects from the waste material discharge port 30 to the outside of the asphalt oil tank 24, and a plurality of scrapers projecting the waste material settled at the bottom in the asphalt oil tank 24 on the conveying surface of the scraper conveyor 26. It is transported to the downstream side (left side in FIG. 2) for a predetermined time while being hooked by the member 26a, and is continuously scraped out from the waste material discharge port 30 to the outside of the asphalt oil tank 24, and the lower part thereof (the waste material drop position). Of the vibrating sieve 27 disposed on the sieve mesh (not shown).

なお、前記スクレーパコンベヤ26の搬送速度は、廃材の処理量等に応じて適宜決定すれば良いが、少なくともアスファルト油槽24内に投入した廃材塊が溶融アスファルトにて十分に加熱・解砕されるのに要する時間以上をかけて外部へ掻き出されるように調整すると良い。廃材塊の加熱・解砕に要する時間は溶融アスファルトの温度等に応じて変動し、例えば、温度が高ければ比較的短時間にて廃材中のアスファルト分の結合力を弱めて解砕処理できるため、その場合には搬送速度を速めに調整すると良く、逆に温度が低ければ搬送速度を遅めに調整すると良い。   The transport speed of the scraper conveyor 26 may be appropriately determined according to the amount of waste material to be processed, but at least the waste material mass charged into the asphalt oil tank 24 is sufficiently heated and crushed by molten asphalt. It should be adjusted so that it is scraped out to the outside over the time required for. The time required for heating and crushing of the waste material mass varies depending on the temperature of the molten asphalt.For example, if the temperature is high, the crushing process can be performed in a relatively short time by weakening the binding power of the asphalt in the waste material. In that case, the transport speed may be adjusted to be higher, and conversely, if the temperature is lower, the transport speed may be adjusted to be lower.

図中の33は熱風発生炉であって、該熱風発生炉33の一端部には加熱手段である前記バーナ25を備えている一方、他端部には熱風導出用の熱風導出ダクト34を連結し、該熱風導出ダクト34の下流側には排風機35及び煙突36を備えている。また、図中の37は臭気性ガス導出管であって、該臭気性ガス導出管37の一端部は前記アスファルト油槽24の天板28を貫通させて溶融アスファルト上位の隙間空間に臨ませている一方、他端部は前記熱風発生炉33に連結し、アスファルト油槽24内の溶融アスファルトより揮発する臭気性ガスを前記臭気性ガス導出管37を介して前記バーナ25付近に導出し、高温の熱風に晒して燃焼分解可能な構成としている。   In the drawing, reference numeral 33 denotes a hot-air generating furnace, which is provided with the burner 25 serving as a heating means at one end of the hot-air generating furnace 33 and connected to a hot-air outlet duct 34 for hot-air outlet at the other end. A blower 35 and a chimney 36 are provided downstream of the hot air outlet duct 34. Further, in the figure, reference numeral 37 denotes an odorous gas outlet pipe, and one end of the odorous gas outlet pipe 37 penetrates the top plate 28 of the asphalt oil tank 24 and faces a clearance space above the molten asphalt. On the other hand, the other end is connected to the hot-air generating furnace 33, and the odorous gas volatilized from the molten asphalt in the asphalt oil tank 24 is led out to the vicinity of the burner 25 through the odorous gas outlet pipe 37, and the high-temperature hot air It can be burned and decomposed by exposure to water.

図中の38は前記アスファルト油槽24内の溶融アスファルトを循環供給する循環配管であって、その途中には循環ポンプ39、及び熱交換器40を介在させている一方、前記熱風発生炉33の熱風導出ダクト34の途中を前記熱交換器40に連結しており、熱風発生炉33から導出される高温の熱風と、アスファルト油槽24から循環供給される溶融アスファルトとを、前記熱交換器40にて順次熱交換させ、アスファルト油槽24内の溶融アスファルトを所定温度に加熱・維持可能な構成としている。   In the figure, reference numeral 38 denotes a circulation pipe for circulating and supplying the molten asphalt in the asphalt oil tank 24. A circulation pump 39 and a heat exchanger 40 are interposed in the circulation pipe, while the hot air of the hot air generation furnace 33 is provided. The middle of the outlet duct 34 is connected to the heat exchanger 40, and the high-temperature hot air derived from the hot-air generating furnace 33 and the molten asphalt circulated and supplied from the asphalt oil tank 24 are used by the heat exchanger 40. Heat is exchanged sequentially, and the molten asphalt in the asphalt oil tank 24 can be heated and maintained at a predetermined temperature.

また、前記熱風発生炉33の熱風導出ダクト34の途中には、熱風を前記熱交換器40へ通過させずに下流の煙突36側に直接導出可能とするバイパスダクト41を連結していると共に、該バイパスダクト41には熱風通過量を調整する調整弁42を備えている。また、前記熱交換器40よりも下流側の循環配管38には、管内を流下する溶融アスファルトの温度を検出する温度センサ43を備え、該温度センサ43にて検出する溶融アスファルトの温度値に基づいて前記調整弁42の開度を調整し、熱交換器40に供給する熱風量を調整して溶融アスファルトの加熱温度を調整制御する溶融アスファルト温度制御器44を備えている。   A bypass duct 41 is connected to the middle of the hot air outlet duct 34 of the hot air generator 33 so that hot air can be directly led to the downstream chimney 36 without passing the hot air to the heat exchanger 40. The bypass duct 41 is provided with an adjustment valve 42 for adjusting the amount of hot air passing. Further, the circulation pipe 38 downstream of the heat exchanger 40 is provided with a temperature sensor 43 for detecting the temperature of the molten asphalt flowing down the pipe, and based on the temperature value of the molten asphalt detected by the temperature sensor 43. A molten asphalt temperature controller 44 that regulates the opening of the regulating valve 42, regulates the amount of hot air supplied to the heat exchanger 40, and regulates and controls the heating temperature of the molten asphalt.

また、図中の45は、前記振動篩27にて廃材から油切りして回収される溶融アスファルトを前記アスファルト油槽24へと戻して再利用するための戻り配管であって、該戻り配管45の途中には供給ポンプ46を備えている。また、図中の47は、運転開始前に予めアスファルト油槽24へ溶融アスファルトを供給して貯留させたり、加熱・解砕処理した廃材と共にアスファルト油槽24から持ち去られる溶融アスファルト分を補充する供給配管であって、その一端部を前記アスファルトプラント1のアスファルトタンク16bに連結している一方、その途中に供給ポンプ48を備え、他端部を前記溶融アスファルト加熱解砕設備22のアスファルト油槽24の廃材投入口29に臨ませている。なお、前記アスファルトタンク16bは、溶融アスファルト加熱解砕設備22側に別途設置しても良いが、アスファルトプラント1に既設のものを利用するようにした方がコスト面で有利である。   Reference numeral 45 in the figure denotes a return pipe for returning the molten asphalt, which has been oil-removed from the waste material by the vibrating sieve 27, to the asphalt oil tank 24 for reuse, A supply pump 46 is provided on the way. Reference numeral 47 in the figure denotes a supply pipe that supplies molten asphalt to the asphalt oil tank 24 in advance before operation and stores the molten asphalt, or replenishes the molten asphalt removed from the asphalt oil tank 24 together with the heated and crushed waste material. In addition, one end is connected to the asphalt tank 16b of the asphalt plant 1, while a supply pump 48 is provided in the middle thereof, and the other end is charged into the asphalt oil tank 24 of the molten asphalt heating and crushing equipment 22. It faces the mouth 29. In addition, the asphalt tank 16b may be separately installed on the side of the asphalt heating and crushing equipment 22, but it is more advantageous to use an existing one in the asphalt plant 1 in terms of cost.

そして、上記構成の溶融アスファルト加熱解砕設備を併設したアスファルトプラントにて、廃材を混入したアスファルト混合物を製造するときには、先ず、前記アスファルトプラント1のアスファルトタンク16bより、供給配管47を介して所定量の溶融アスファルトを溶融アスファルト加熱解砕設備22のアスファルト油槽24に供給して貯留させる。そして、前記熱風発生炉33のバーナ25を着火・燃焼し、高温の熱風を熱風導出ダクト34を介して下流の熱交換器40へと供給すると共に、循環配管38の循環ポンプ39を駆動させてアスファルト油槽24内の溶融アスファルトを前記熱交換器40へと循環供給し、前記熱風と順次熱交換させて少なくとも廃材中のアスファルト分が軟化溶融する所定温度、例えば約160℃程度に加熱昇温させる。   Then, when producing an asphalt mixture containing waste material in an asphalt plant provided with the molten asphalt heating and crushing equipment having the above configuration, first, a predetermined amount is supplied from the asphalt tank 16b of the asphalt plant 1 through the supply pipe 47. Of molten asphalt is supplied to and stored in the asphalt oil tank 24 of the hot asphalt crushing equipment 22. Then, the burner 25 of the hot-air generating furnace 33 is ignited and burned, and high-temperature hot air is supplied to the downstream heat exchanger 40 via the hot-air outlet duct 34, and the circulation pump 39 of the circulation pipe 38 is driven. The molten asphalt in the asphalt oil tank 24 is circulated and supplied to the heat exchanger 40, and is sequentially heat-exchanged with the hot air to be heated to a predetermined temperature at which at least the asphalt component in the waste material is softened and melted, for example, heated to about 160 ° C. .

次いで、粗破砕した廃材塊を前記投入ホッパ31、投入コンベヤ32を介してアスファルト油槽24内の高温の溶融アスファルト中に投入する。アスファルト油槽24の底部に沈降した廃材塊は、スクレーパコンベヤ26のスクレーパ部材26aにて所定時間をかけて下流端の廃材排出口30へと掻き出していき、その間に廃材中のアスファルト分を昇温させて徐々に軟化溶融させてバラバラに解砕処理する。このとき、約160℃程度で加熱することによって廃材内部の残留水分も蒸発して完全に抜け切り、アスファルト混合物の材料として使用する上で適当な性状に調整される。   Next, the roughly crushed waste material lump is charged into the high-temperature molten asphalt in the asphalt oil tank 24 via the charging hopper 31 and the charging conveyor 32. The waste material mass that has settled to the bottom of the asphalt oil tank 24 is scraped out by the scraper member 26a of the scraper conveyor 26 to the waste material discharge port 30 at the downstream end for a predetermined time, during which the asphalt in the waste material is heated. And gradually softened and melted and disintegrated into pieces. At this time, by heating at about 160 ° C., the residual water inside the waste material is also evaporated and completely removed, and the properties are adjusted to be suitable for use as a material of the asphalt mixture.

そして、この加熱・解砕処理した廃材を廃材排出口30からアスファルト油槽24外へと連続的に排出し、廃材排出口30の下位に配置した振動篩27に落下投入する。前記振動篩27では廃材を篩ってその表面に付着残留する溶融アスファルトを油切りし、この油切りした廃材を前記バケットエレベータ23を介し、隣接するアスファルトプラント1の廃材貯蔵ビン5に搬送して貯蔵する一方、油切りによって分離回収した溶融アスファルトは戻り配管45を介してアスファルト油槽24へと戻して再利用する。   The heated and crushed waste material is continuously discharged from the waste material discharge port 30 to the outside of the asphalt oil tank 24, and is dropped into the vibrating sieve 27 disposed below the waste material discharge port 30. In the vibrating sieve 27, the waste material is sieved and the molten asphalt adhering and remaining on the surface is drained, and the drained waste material is conveyed to the waste storage bin 5 of the adjacent asphalt plant 1 via the bucket elevator 23. On the other hand, the molten asphalt separated and collected by the oil drainer is returned to the asphalt oil tank 24 via the return pipe 45 for reuse.

そして、アスファルトプラント1では、前記骨材貯蔵ビン14及び廃材貯蔵ビン5から払い出される加熱骨材及び加熱廃材を骨材計量槽15及び廃材計量槽6にてそれぞれ計量しながら下位のミキサ20内に所定量ずつ投入し、かつ前記廃材の表面に付着残留する溶融アスファルト量に応じ、アスファルトタンク16aより供給する新規の溶融アスファルトを所定量添加混合し、所望配合のアスファルト混合物を製造する。   Then, in the asphalt plant 1, the heated aggregate and the heated waste discharged from the aggregate storage bin 14 and the waste storage bin 5 are measured in the aggregate measuring tank 15 and the waste measuring tank 6, respectively, into the lower mixer 20. A predetermined amount of the molten asphalt supplied from the asphalt tank 16a is added and mixed in accordance with the amount of the molten asphalt adhering and remaining on the surface of the waste material, thereby producing an asphalt mixture having a desired composition.

なお、加熱・解砕処理した廃材表面に付着残留する溶融アスファルト量は、例えば、予めテスト運転を実施し、振動篩27通過後に採取した複数のサンプルから溶融アスファルトの実際の付着量を測定してその平均値をとるようにすると良い。そして、その付着量と、アスファルト混合物中の廃材の混入割合とを乗算し、その乗算結果と、製造するアスファルト混合物に配合するアスファルト量とを比較し、不足するようであればその不足分の溶融アスファルトを添加混合する。   The amount of molten asphalt adhering and remaining on the surface of the waste material subjected to the heating and crushing treatment is determined, for example, by performing a test operation in advance and measuring the actual amount of molten asphalt from a plurality of samples collected after passing through the vibrating sieve 27. It is better to take the average value. Then, the amount of adhesion is multiplied by the mixing ratio of the waste material in the asphalt mixture, and the result of the multiplication is compared with the amount of asphalt to be added to the asphalt mixture to be produced. Add asphalt and mix.

例えば、加熱・解砕処理した廃材表面に付着する溶融アスファルト量が4%、廃材の混入割合が5割であれば、それらを乗算すると2%となる。そして、製造するアスファルト混合物に配合するアスファルト量が5%であれば、前記乗算結果の2%と比較すると3%不足するため、その不足分である3%の溶融アスファルトを添加混合することにより、溶融アスファルトの付着残量にかかわらず、配合通りの(溶融アスファルトの過不足のない)アスファルト混合物を製造できる。   For example, if the amount of molten asphalt adhering to the surface of the waste material subjected to the heating and crushing treatment is 4% and the mixing ratio of the waste material is 50%, multiplying them results in 2%. Then, if the asphalt amount to be blended into the asphalt mixture to be produced is 5%, it is insufficient by 3% as compared with 2% of the multiplication result. By adding and mixing 3% of the molten asphalt which is the shortage, Regardless of the remaining amount of the molten asphalt, it is possible to produce an asphalt mixture as defined (with no excess or deficiency of the molten asphalt).

なお、本実施例では、溶融アスファルト加熱解砕設備22のアスファルト油槽24内に貯留する溶融アスファルトの加熱温度を約160℃としたが、これにより、従来破砕処理後に行っていた廃材ドライヤでの加熱処理工程が不要となり、効率よくアスファルト混合物を製造できると共に、廃材ドライヤにてバーナからの高温の熱風に直接晒されることで生じる可能性のあったアスファルト分の熱劣化といった不具合を防止できる。   In the present embodiment, the heating temperature of the molten asphalt stored in the asphalt oil tank 24 of the molten asphalt heating and crushing equipment 22 was set to about 160 ° C., whereby the heating in the waste material dryer which was conventionally performed after the crushing treatment was performed. This eliminates the need for a treatment step, allows for efficient production of the asphalt mixture, and prevents problems such as thermal degradation of asphalt, which may occur when the waste material dryer is directly exposed to high-temperature hot air from a burner.

ただし、何ら上記温度に限定するものではなく、例えばそれよりも低温の約100℃程度でも良く、要は少なくとも廃材中のアスファルト分が軟化溶融する温度以上であれば良い。その場合、アスファルト混合物を製造する際の廃材の加熱処理温度(約160℃)には満たないため、例えば、前記骨材ドライヤ2にて骨材を通常よりも高温に加熱しておき、この高温の骨材と前記廃材とを前記ミキサ20内に投入して混合した際に約160℃程度に調整されるようにしておくと良い。   However, the temperature is not limited to the above-mentioned temperature, and may be, for example, about 100 ° C., which is lower than the above-mentioned temperature. In this case, since the heat treatment temperature (about 160 ° C.) of the waste material at the time of producing the asphalt mixture is lower than the temperature, the aggregate is heated to a higher temperature than usual by the aggregate dryer 2, for example. It is preferable to adjust the temperature to about 160 ° C. when the aggregate and the waste material are charged into the mixer 20 and mixed.

このように、廃材塊を高温の溶融アスファルトに浸漬させて廃材中のアスファルト分を軟化溶融させて加熱・解砕処理することにより、騒音や粉塵の発生を軽減でき、例え都市部近郊のアスファルト混合物製造工場の敷地内であってもさほど支障なく処理できる。また、従来のように、インパクトクラッシャ等の二次破砕機での細破砕処理が不要となるため、廃材を必要以上に破砕せずに粒径をある程度維持したまま回収でき、廃材を混入したアスファルト混合物を品質良く製造することができる。   In this way, the waste material mass is immersed in high-temperature molten asphalt, the asphalt component in the waste material is softened and melted, and then heated and disintegrated, thereby reducing the generation of noise and dust.For example, asphalt mixtures near urban areas Processing can be performed without any problem even on the premises of a manufacturing factory. In addition, as in the past, fine crushing with a secondary crusher such as an impact crusher is not required, so that waste materials can be recovered without crushing more than necessary, while maintaining the particle size to some extent, and asphalt mixed with waste materials The mixture can be produced with good quality.

本発明は、廃材を混入したアスファルト混合物を製造するアスファルトプラントに対して広く利用できる。   INDUSTRIAL APPLICATION This invention can be widely utilized for the asphalt plant which manufactures the asphalt mixture which mixed the waste material.

1…アスファルトプラント 2…骨材ドライヤ
4…プラント本体 5…廃材貯蔵ビン
6…廃材計量槽 13…振動篩
14…骨材貯蔵ビン 15…骨材計量槽
16a、16b…アスファルトタンク 20…ミキサ
21…高架台 22…溶融アスファルト加熱解砕設備
23…バケットエレベータ(垂直搬送装置)
24…アスファルト油槽 25…バーナ(加熱手段)
26…スクレーパコンベヤ 27…振動篩(油切り手段)
33…熱風発生炉 34…熱風導出ダクト
37…臭気性ガス導出管 38…循環ダクト
40…熱交換器
DESCRIPTION OF SYMBOLS 1 ... Asphalt plant 2 ... Aggregate dryer 4 ... Plant main body 5 ... Waste material storage bin 6 ... Waste material measuring tank 13 ... Vibrating sieve 14 ... Aggregate storage bin 15 ... Aggregate measuring tank 16a, 16b ... Asphalt tank 20 ... Mixer 21 ... Elevated stand 22 ... Heat cracking equipment for molten asphalt 23 ... Bucket elevator (vertical transfer device)
24 ... asphalt oil tank 25 ... burner (heating means)
26: scraper conveyor 27: vibrating sieve (oil draining means)
33 hot air generating furnace 34 hot air outlet duct 37 odorous gas outlet pipe 38 circulation duct 40 heat exchanger

Claims (5)

骨材ドライヤにて加熱処理した骨材を受け入れる振動篩、骨材貯蔵ビン、骨材計量槽及びミキサを階層状に組み上げて成るプラント本体の側部地上に、溶融アスファルトを貯留するアスファルト油槽と、該アスファルト油槽内の溶融アスファルトを所定温度に加熱する加熱手段と、前記アスファルト油槽内に投入される廃材を連続的に掻き出す掻き出し手段と、掻き出した廃材から溶融アスファルトを油切りする油切り手段とを備えた溶融アスファルト加熱解砕設備を設置し、該該溶融アスファルト加熱解砕設備のアスファルト油槽内の溶融アスファルトに廃材塊を浸漬して加熱しながら廃材塊に付着するアスファルトの結合力を弱めて廃材塊を解砕し、この解砕した加熱廃材をアスファルト混合物の素材として使用する構成としたことを特徴とするアスファルトプラント。   An asphalt oil tank for storing molten asphalt on a side surface of a plant body that is made up of a vibrating sieve, an aggregate storage bin, an aggregate measuring tank, and a mixer that receives aggregate heated by an aggregate dryer in a hierarchical manner; Heating means for heating the molten asphalt in the asphalt oil tank to a predetermined temperature, scraping means for continuously scraping waste material put into the asphalt oil tank, and oil draining means for oil-cutting the molten asphalt from the scraped waste material. Equipped with a hot asphalt heating and crushing equipment provided, and immersing the refuse mass in the asphalt oil tank in the asphalt oil tank of the hot asphalt crushing device, heating the asphalt and weakening the asphalt bonding force attached to the waste material mass while heating. It is characterized in that the lumps were crushed and the crushed waste heat was used as a material for asphalt mixture. Asphalt plant to be. 前記加熱手段として、バーナを備えた熱風発生炉と、該熱風発生炉の熱風と前記アスファルト油槽内の溶融アスファルトとを熱交換して溶融アスファルトを所定温度に加熱する熱交換器と、前記アスファルト油槽から前記熱交換器に溶融アスファルトを循環供給する循環回路とを備えたことを特徴とする請求項1記載のアスファルトプラント。   As the heating means, a hot air generating furnace equipped with a burner, a heat exchanger for exchanging heat between hot air of the hot air generating furnace and molten asphalt in the asphalt oil tank to heat the molten asphalt to a predetermined temperature, and the asphalt oil tank 2. A asphalt plant according to claim 1, further comprising a circulation circuit for circulating and supplying molten asphalt to the heat exchanger. 前記アスファルト油槽は側壁面の一部を傾斜構造とした略舟形状とすると共に、前記掻き出し手段は前記アスファルト油槽の底面から傾斜構造とした前記側壁面に沿って配置したスクレーパコンベヤとしたことを特徴とする請求項1または2記載のアスファルトプラント。   The asphalt oil tank has a substantially boat shape in which a part of a side wall surface has an inclined structure, and the scraping means is a scraper conveyor arranged along the side wall surface having an inclined structure from a bottom surface of the asphalt oil tank. The asphalt plant according to claim 1 or 2, wherein 前記アスファルト油槽内にて発生する臭気性ガスを前記熱風発生炉に導出して燃焼分解させる臭気ガス導出管を備えたことを特徴とする請求項2または3記載のアスファルトプラント。   The asphalt plant according to claim 2 or 3, further comprising an odor gas outlet pipe that leads the odorous gas generated in the asphalt oil tank to the hot-air generating furnace and burns and decomposes the odorous gas. 道路工事によって掘り起こされる廃材塊を粗破砕し、粗破砕後の廃材塊を溶融アスファルトを貯留するアスファルト油槽内に投入し、溶融アスファルトに所定時間浸漬して加熱しながら廃材塊に付着するアスファルトの結合力を弱めて廃材塊を解砕し、この解砕した廃材をアスファルト油槽から連続的に掻き出し、廃材に付着する溶融アスファルトを油切りした後、アスファルト混合物の素材として使用することを特徴とするアスファルトプラントのアスファルト混合物製造方法。   Coarse crushing of the waste material mass excavated by road construction, putting the coarsely crushed waste material mass into the asphalt oil tank that stores the molten asphalt, immersing it in the molten asphalt for a predetermined time, and bonding the asphalt that adheres to the waste material mass while heating Asphalt characterized by using as a material of asphalt mixture after crushing waste material mass by weakening force, continuously scraping the crushed waste material from asphalt oil tank, draining molten asphalt adhering to waste material, Plant asphalt mixture production method.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114351536A (en) * 2021-12-03 2022-04-15 范思哲 High-temperature melting equipment for petroleum asphalt for roads

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56159405A (en) * 1980-04-15 1981-12-08 Seiichi Inoue Regenerating utilization of asphalt mixture
JPS5796106A (en) * 1980-12-08 1982-06-15 Tokyo Koki Kk Asphalt plant
JPS6217201A (en) * 1985-07-15 1987-01-26 柴田 哲男 Method for regenerating and utilizing waste asphalt paving material
US4706893A (en) * 1986-07-07 1987-11-17 Astec Industries, Inc. Method and apparatus for recycling roofing shingles as an additive to asphalt paving composition
JPH02144187A (en) * 1988-11-22 1990-06-01 Kyushu Nozawa Kk Treatment equipment of waste asphalt aggregate
WO1998031519A1 (en) * 1997-01-17 1998-07-23 Modiglass Modified Asphalt- And Glassmatmachines Ltd. Method and apparatus for recycling of bituminous materials, more in particular bituminous roofing materials
KR20030023248A (en) * 2001-09-13 2003-03-19 장미희 method for manufacture of ascon using industrial waste matters and Sand, Pebbles
WO2005068080A1 (en) * 2004-01-15 2005-07-28 Samheung Environment Co., Ltd. Method and apparatus for separating and recycling waste asphalt concrete of construction waste articles
JP2005330713A (en) * 2004-05-20 2005-12-02 Yozo Yamamoto Method of manufacturing recycled asphalt concrete aggregate
JP2006009328A (en) * 2004-06-24 2006-01-12 Nikko Co Ltd Method and apparatus for recycling asphalt pavement waste material
JP2006118301A (en) * 2004-10-25 2006-05-11 Kagawa Tekko Kk Asphalt dissolution plant
JP2008255748A (en) * 2007-04-09 2008-10-23 Nikko Co Ltd Energy saving method by installment of industrial waste incineration facility in asphalt concrete production plant
KR101129599B1 (en) * 2011-10-06 2012-03-27 신인호 Apparatus for disposing dust and oil particle in facility of regenerating waste ascon

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56159405A (en) * 1980-04-15 1981-12-08 Seiichi Inoue Regenerating utilization of asphalt mixture
JPS5796106A (en) * 1980-12-08 1982-06-15 Tokyo Koki Kk Asphalt plant
JPS6217201A (en) * 1985-07-15 1987-01-26 柴田 哲男 Method for regenerating and utilizing waste asphalt paving material
US4706893A (en) * 1986-07-07 1987-11-17 Astec Industries, Inc. Method and apparatus for recycling roofing shingles as an additive to asphalt paving composition
JPH02144187A (en) * 1988-11-22 1990-06-01 Kyushu Nozawa Kk Treatment equipment of waste asphalt aggregate
WO1998031519A1 (en) * 1997-01-17 1998-07-23 Modiglass Modified Asphalt- And Glassmatmachines Ltd. Method and apparatus for recycling of bituminous materials, more in particular bituminous roofing materials
KR20030023248A (en) * 2001-09-13 2003-03-19 장미희 method for manufacture of ascon using industrial waste matters and Sand, Pebbles
WO2005068080A1 (en) * 2004-01-15 2005-07-28 Samheung Environment Co., Ltd. Method and apparatus for separating and recycling waste asphalt concrete of construction waste articles
JP2005330713A (en) * 2004-05-20 2005-12-02 Yozo Yamamoto Method of manufacturing recycled asphalt concrete aggregate
JP2006009328A (en) * 2004-06-24 2006-01-12 Nikko Co Ltd Method and apparatus for recycling asphalt pavement waste material
JP2006118301A (en) * 2004-10-25 2006-05-11 Kagawa Tekko Kk Asphalt dissolution plant
JP2008255748A (en) * 2007-04-09 2008-10-23 Nikko Co Ltd Energy saving method by installment of industrial waste incineration facility in asphalt concrete production plant
KR101129599B1 (en) * 2011-10-06 2012-03-27 신인호 Apparatus for disposing dust and oil particle in facility of regenerating waste ascon

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114351536A (en) * 2021-12-03 2022-04-15 范思哲 High-temperature melting equipment for petroleum asphalt for roads

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