Manufacturing technique of industrial binder asphalt

Abstract

The invention relates to a manufacturing technique of novel industrial binder asphalt, which comprises the following steps that asphalt is fed into a reaction kettle; a stirrer is started; with the temperature in the reaction kettle controlled at 300-360 DEG C, high temperature polycondensation is performed to synthesize the industrial binder asphalt; at the same time, a mixed gas of nitrogen and oxygen is injected to the reaction kettle from the bottom of the reaction kettle; free radicals in the asphalt are oxidized by oxygen in the mixed gas in a reaction process to improve the molecular weight of the asphalt; and light ingredients in the asphalt are brought out by the left mixed gas, and are called flash oil. According to the technique, the mixed gas of nitrogen and oxygen is introduced to the reaction kettle, and the reaction temperature can be reduced to around 300 DEG C from the traditional over 400 DEG C, so that energy is saved, the cost is lowered greatly, and a synthetic product is high in quality. In addition, the mixed gas is introduced to participate in the reaction, so that a situation that no flash burn or explosion of the flash oil occurs is ensured, and the safety of technological operation is improved accordingly.

Description

technical field [0001] The invention belongs to the tar processing industry, and specifically relates to a production process of industrial binder asphalt (the softening point is adjustable at 100-150°C). Background technique [0002] At present, domestic tar processing is gradually tending to scale. There are more than 10 domestic manufacturers with a processing scale of more than 500,000 tons per year, and asphalt products account for more than half of the output of tar processing products. So far, domestic coal tar pitch products Mainly asphalt products with a softening point of 110°C. [0003] At present, the domestic production of modified asphalt mainly adopts the traditional kettle-type heating high-temperature polymerization process. This process not only consumes a lot of energy, but also has a long process, and the bottom of the kettle is easy to coke. The production cycle is short, usually only more than 20 days per cycle. This process requires a high temperature...

AI Technical Summary

Problems solved by technology

[0003] At present, the domestic production of modified asphalt mainly adopts the traditional kettle-type heating high-temperature polymerization process. This process not only consumes a lot of energy, but also has a long process, and the bottom of the kettle is easy to coke. The production cycle is short, usually only more than 20 days per cycle.

This process requires a high temperature in the kettle, which often needs to be heated to above 400°C. This not only requires high requirements for equipment, pipelines, and valves, but also produces flash oil that is prone to spontaneous combustion and explosion, causing the flash oil tank and the middle tank to become the biggest safety risk. area

Therefore, the quality of asphalt products produced by this process is often not up to the requirements

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