How to deal with the loose mouth of a bulky can

Thank you to the above poster, yes! When our company stores crude oil, the crude oil tanks often smell of benzene, which seriously pollutes the environment. I don’t know any good way to solve this problem. It is also easy to block and unsafe. Please think of a solution... Thank you……

Add flame arrester. On the one hand, gas release can be achieved ； On the other hand, safety can be guaranteed.

Adding a breathing valve to the relief port can reduce part of the pollution

If there is nitrogen, a nitrogen pipe can be connected to the upper part of the benzene tank to form a nitrogen seal and create a slight positive pressure in the tank. It can effectively prevent the volatilization of benzene. In summer, a cooling water spray device is installed on the benzene tank to inhibit the volatilization of benzene.

Is the benzene tank of the original poster an intermediate tank or a storage tank? If it is a storage tank, you can pass nitrogen into the tank, which can prevent explosions and effectively solve the odor problem.

Thank you for your help. Someone mentioned using nitrogen above, but when you used nitrogen, it increased the pressure of the storage tank. How to solve this! My company has a lot of nitrogen. Sealing with nitrogen is a good way, but how to deal with the pressure?

How did your company do it? I still don’t understand what you mean. How did you seal it?

You use nitrogen to prevent the volatilization of benzene vapor, but it cannot be done so well. The pressure of the storage tank continues to increase, which increases the safety of the storage tank, what do you think?

The benzene tank used by our company is an intermediate tank

Nitrogen is introduced from the top of the tank, and the amount must be controlled. There is a safety valve on the top of the benzene tank. As long as the nitrogen can be discharged from the safety valve, there will be no problem.

Go straight to the scrubber and get it done once and for all!

I understand what the friend above means. My question is, what should I do if the safety valve breaks? The nitrogen enters the intermediate tank and the pressure increases. Isn't it very dangerous? What I mean is, is there any good way? The nitrogen enters from the top of the tank and comes out from the top of the tank. This suppresses the benzene vapor. Once the pressure inside is too high, the benzene vapor and nitrogen come out from the top of the tank together. This is safe and reduces the dispersion of benzene vapor into the surrounding environment. Is there any good idea? You don't need any valves and only use pipes to achieve this effect. What do you think? ! ! For friends upstairs, go directly to the scrubber. Our scrubber and intermediate tank are relatively far apart. In addition, connecting to the scrubber requires a fire. You also know that it is very dangerous. It is not worth it for this, and it will affect production! ! ! Not a good idea. I don’t know how your company handles this problem. Please introduce it. Thank you.……

It is very convenient to install a scrubber, and now environmental protection requirements are very high. Our company has added a small scrubber outside the wall of the bulky area, and the pipeline links in all areas are connected with flanges, so there is no need to use fire at all. Our company has also installed a scrubber in the drum cooling area, and the effect is good, but the washing water volume is large, and the wastewater COD is as high as 8000 `9000mg/l. Therefore, plants with weak sewage treatment capabilities should carefully consider

My friend said that it is sealed with nitrogen, is this how your factory does it?

After the benzene tank gas is collected in centralized pipelines, it enters the exhaust cleaning tower and is washed with washing oil before being sent to the benzene elution system, which meets environmental protection requirements.

You can consider using an internal floating roof tank to reduce leakage.

Add a water sealing device directly to the discharge port. It can reduce the volatilization of benzene substances.

I don’t know if the temperature in the poster’s location exceeds 30 degrees. The temperature in our factory is below 30 degrees most of the year, so we only need a breathing valve. If the temperature is high, spray the crude benzene storage tank with fire water, which can reduce the temperature of the crude benzene in the storage tank and prevent a large amount of benzene vapor from coming out. Our company has not had any breathing valve blockage.

Use nitrogen sealing to add a safety valve, and the exhaust ports of the safety valve are gathered together and led to the intermediate tank.

Extend the outlet to make a water seal and water seal groove