With the rapid development of highways, the use of asphalt concrete is increasing, and the demand for asphalt concrete mixing stations is increasing. Asphalt in the asphalt tank is generally heated by a thermal oil heating system, but there are generally problems of long heating time and low efficiency. In this paper, the asphalt heating system of the concrete mixing plant is modified to reduce fuel consumption and improve production efficiency.

In the past two decades, my country's highway construction has developed rapidly. As of 2012, highway mileage has reached 4.1 million kilometers. With the rapid development of economy, highway construction plays an increasingly important role in the national economic and social development. Governments at all levels from the central to local governments attach great importance to the construction of transportation infrastructure, and the technical standards for highways are constantly improving. In recent years, the average annual growth rate of asphalt pavement in my country has exceeded 25%, much higher than the growth rate of cement pavement. Asphalt concrete pavement has more and more applications in high-grade highways due to its flat surface, environmental protection, energy saving, and recyclable characteristics. Asphalt concrete roads have gradually become the mainstream, which has also led to the increasing demand for asphalt concrete. , Construction of large asphalt concrete mixing plant has become an important choice. Asphalt concrete mixing plant not only has excellent mixing host, but also has many excellent accessories, which together ensure the accuracy of operation. As the mechanization degree of asphalt concrete mixing plant is relatively high, its functionality is also very high. The use of asphalt concrete mixing station can ensure the processing quality and speed of asphalt, and it is widely used in highways and bridges where the demand for asphalt is large and the construction period is relatively long. With the deepening of the urbanization process, the asphalt concrete mixing plant has also been greatly promoted and developed.

Analysis of heat conduction heating supply system of asphalt

Asphalt concrete mixing station thermal conduction heating supply system is an important device of asphalt concrete mixing station. The system includes asphalt storage tank, thermal oil furnace, asphalt delivery pump and asphalt spray pump. They are organically connected by pipelines and coordinated. -To work. The function of the system is to provide asphalt with a certain temperature requirement for mixing, and to heat the mixing tank and finished product storage bin. Heat-conducting oil pipes, pumps and asphalt pipes are all provided with thermal insulation layers.

Asphalt storage tank

Asphalt storage tank is a device that stores asphalt and can heat asphalt to heat up. Currently, the popular asphalt tank models on the market are 30t, 40t and 50t.

working principle

The heat-conducting oil is used as the heat-carrying medium, which is heated and stored by the hot oil furnace. The heat conduction oil is forced to circulate through the heat exchange pipes in the asphalt storage tank through the hot oil pump to transfer the heat energy to the asphalt to achieve the purpose of heating the asphalt.