Performance characteristics and key points of system design of asphalt fume control

Performance characteristics

Asphalt smoke is characterized by easy adhesion and easy combustion above a certain temperature. In the process of asphalt smoke collection, transportation and smoke elimination, it is easy to stick to the surface of pipeline equipment to form liquid to solid asphalt, which is difficult to remove after consolidation, and affects the normal operation of the system. In addition, the main components of asphalt smoke are aromatic and heterocyclic compounds, which will cause serious pollution to the environment.

The properties of asphalt and asphalt smoke are as follows: asphalt spontaneous ignition point 610℃, lower limit of explosion 35g/m³, maximum ignition energy 40mJ, maximum explosion pressure 0.32mpa, average pressure rise speed 2.5mpa /s, critical oxygen content of 16% to prevent floating dust from being triggered by electric spark.

Key points of system design

According to the data, the system designed the electric top high pressure spray fire prevention device and explosion-proof device. According to the relevant data and asphalt smoke characteristics, the design points are as follows:

1. the best temperature of asphalt smoke trap is 60℃-80℃, below 50℃, asphalt is easy to bond, more than 100℃ than high resistance is not easy to capture, but also does not meet the process requirements of asphalt smoke trap.

2. prevent the flue attached to the asphalt burning, open fire, dark fire into the asphalt smoke trap.

3. as far as possible to reduce the coal dust in the flue gas, improve the fluidity of the coal tar asphalt of the asphalt smoke catcher.

4. asphalt smoke catcher with explosion-proof device.

5.In order to solve the problem of large diameter of electric capture equipment and easy deflection of airflow, an advanced diversion air distribution system should be installed at the bottom of the equipment.