Why can’t benzene be burned in a flare?

What about the original poster’s own opinion? Can benzene burn completely in a torch? If not, can it be released?

Benzene has a high boiling point, so the possibility of it escaping into the atmosphere is very low

It condenses in the separation tank; if it burns, the combustion is incomplete and black smoke is produced! !

I wonder where the original poster got the idea that benzene cannot be burned in a flare? Could you tell me the source? Regarding the reason for the 5th floor, there are two points: 1. Benzene has a low melting point; 2. Benzene is toxic. But can’t a torch be used if the melting point is low? Can a steam heating tank be installed in the torch tank to prevent it from solidifying? The toxicity of benzene doesn’t seem very convincing to me. Firstly, the design specifications do not state that substances with high toxicity cannot be sent to a flare tower; rather, they require a separate emission system. Secondly, when benzene is burned in a flare, it turns into CO2 and water, so there is no toxicity issue. As I understand it, this clause is mainly aimed at substances that remain toxic after burning. As for the reasons for the 3rd and 4th floors, they are also unreasonable. The molecules of the material burned in refinery flares have a much higher molecular weight than benzene, and their boiling points are even higher than those of benzene. As for the problem of black smoke, smoke-suppressing steam can be used. Regarding this question, LZ, please indicate the source; I really don’t understand where such a rule comes from. In the past, when styrene was drying, wasn’t benzene released into the flare tank?

We’re diverting the aromatics extraction unit to the flare, and the benzene tower as well. Why can’t benzene be sent to a flare? ? ? ?

The hazard level of benzene should be classified as highly toxic

Benzene has a melting point of 80 degrees; how to burn it using a torch?

I’m not entirely sure about the specific regulatory requirements; for the benzene-containing fluids I’ve dealt with, they were all discharged into the plant’s vent tank, and the gas at the top of that tank was sent to the flare system. In fact, only a small amount of benzene ends up in the flare system, as most of it turns into a liquid phase inside the vent tank. Only in case of an emergency does a larger amount end up there. The same approach is taken even when working with process packages created by foreigners.

Benzene is in a liquid state at room temperature, and it turns solid at slightly lower temperatures (5.5 degrees). Why can’t it be burned with a torch? The answer is obvious, right?

Replying to the post on floor 9: The melting point of benzene is not 80 degrees

If the temperature of the exhaust gas is below the boiling point, rain of flames will occur during combustion, which is dangerous!

The most direct answer is that the liquid phase cannot enter the flare for combustion; otherwise, incomplete combustion will result in a rain of embers. This is why some flare designs include a liquid separation tank. Article 4.02 of the Design Code for Fuel Gas Systems and Combustible Gas Emission Systems SH3009-2001 states that the following gases should not be discharged into the plant’s general combustible gas emission system; instead, they should be sent to specialized emission systems or treated separately, provided that it is indeed a gas. This can also explain why the vent gas from the tank can be sent to the flare – as the benzene content in this gas is not high, it generally does not condense into a liquid phase; and even if liquid forms occasionally, it remains in the separation tank. Therefore, the vent gas from the tank as well as the exhaust gas generated during loading can be directed to the flare or incinerator

Benzene is a component of gasoline – why isn’t it willing to burn?

Incomplete combustion of benzene has an impact on the environment

The gas phase can be discharged to a flare, while the liquid phase is not allowed.