Efficient and energy-saving asphalt concrete stirring system

Abstract

The invention provides an efficient and energy-saving asphalt concrete stirring system, which belongs to the technical field of mechanical manufacturing. In the asphalt concrete stirring system, the traditional fuel is replaced with a clean fuel of coal water slurry to provide hot air so as to dry and heat aggregates; the coal water slurry is fed to a coal water slurry combustion chamber by a coal water slurry feeding system; the coal water slurry combustion chamber is used for combusting the coal water slurry to heat the air so as to heat the aggregates; a coal water slurry combustion boiler is used for heating a heat conducting oil; and then the heated heat conducting oil is used for heating asphalt in an asphalt storage tank by a coiled tube; the coal water slurry is obtained physically machining 65% of coal, 34% of water and 1% of additive; lower burnout rate of the coal water slurry and lower carbon content in furnace slag are achieved, total space usage of a boiler room is reduced, the surrounding environment is improved, energy conservation and environment friendliness are achieved; the storage tank can be used for transporting and storing, so as to reduce pollution in the coal transporting process and storage space usage; lower hazards in storage and operation are achieved; and stronger promotion and application values are obtained.

Description

technical field [0001] The invention belongs to the technical field of mechanical manufacturing, and in particular relates to a high-efficiency and energy-saving asphalt concrete mixing system. Background technique [0002] With the development of the national economy, my country's road construction, especially the construction of expressways, has achieved remarkable development and achievements. From the tens of thousands of kilometers at the beginning of the founding of the People's Republic of China to the current nearly 4 million kilometers, the expressway was built in 1884 and opened to traffic at the end of 1988. The first Shanghai-Jiajia Expressway has a total mileage of 74,000 roads, ranking second in the world. During the 12th Five-Year Plan period, the country took the development of transportation infrastructure as a key investment area while taking into account the development gap between the eastern and western regions and between urban and rural areas. It is e...

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Problems solved by technology

[0007] The invention provides a high-efficiency and energy-saving asphalt concrete mixing system, which aims to solve the problem of drying and heating the aggregate in order to improve the coating and paving properties of asphalt and aggregate in the process of asphalt concrete mixing and preparation. After reaching a certain temperature, it is mixed with hot asphalt. Usually, heaters burning heavy oil, natural gas or coal provide hot air to heat aggregates and coal-fired boilers heat heat transfer oil. Fuel and gas mainly have high cost economic problems. Coal-fired Then the thermal efficiency is low, the combustion is insufficient, and a large amount of dust, SO2, NOx and ash are discharged, causing serious environmental pollution problems.

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