It's time for businesses and governments to take more proactive action.
One of the advantages of the adsorption tower method is that it can capture even small amounts of contaminants if it has a very large facility and maintains its performance by continuously replacing the adsorbent.
However, it is true that it involves a lot of cost. In the end, the cost of maintaining the performance can be said to be a very big disadvantage.
GASminer can significantly reduce the concentration of emission sources in front of AC towers, so the performance of AC towers can be expanded by more than two times at a low cost. The reason why this is possible is that GASminer is very suitable for cost-effective recovery and liquefaction of large quantities of volatile organic compounds, but small amounts of VOCs cannot be recovered 100% by the cooling method of GASminer. In fact, about 5% of low-carbon compounds pass through GASminer, and if AC towers are installed at the rear, the remaining 5% can be recovered very effectively by adsorption.
Therefore, the optimal method for reducing VOCs emissions is to operate gas miners and AC towers in parallel, thereby breaking away from the existing blind-eye operation method of environmental facilities, and achieving investment effects while operating in compliance with relevant regulations.
If the gas station does not have a Stage III vapor liquefaction system installed, the gas station's vent pipe will look like the picture below.
It means that no devices are connected. Few gas stations currently have Stage III installed, so it would be fair to say that all gas stations around the world are the same.
No one would think that very little oil vapor escapes through those vents. Still, it's safe to assume that not having any devices plugged in seems quite problematic. In fact, since oil vapor is heavier than air, such a high ventilation pipe is applied, but in the end, it is clear that it will have a very bad effect on the human body of the people living around it.
Environmental authorities in each country are enacting and implementing various legal systems to prevent gas stations from emitting VOCs.
There are three main reasons for this.
First, oil vapors always occur naturally and continuously. Gasoline is sensitive to temperature, so when the temperature rises, additional oil vapor is created and the pressure in the underground storage tank rises, so it is naturally discharged. There is no precise and accurate measurement of how much that amount is. This is because the temperature varies greatly during the day and even more greatly during the year.
Second, the tank truck does not fully recover in Stage I. Also, when tank trucks refill gasoline in underground storage tanks, huge amounts are emitted. The oil vapor recovery facility called Stage I is a device that puts the oil vapor discharged at this time into a tank truck. The problem is that since it is removed immediately after refilling, it will be discharged for a considerable amount of time. This is because the pressure in the underground storage tank cannot immediately reach equilibrium.
Third, the oil vapor recovered in Stage II increases the pressure in the storage tank, causing the oil vapor to escape.
And there is an oil vapor recovery facility called Stage II, which sucks oil vapor from the car fuel tank and sends it to the underground storage tank. If the temperature of the oil vapor inhaled from the vehicle is high, the oil vapor is additionally generated in the underground storage tank or the pressure increases due to the increase in temperature, causing the oil vapor to escape through the vent pipe.
As it is true that oil vapor is continuously discharged from the vent pipe as described above, it is urgently necessary to install a device to finally liquefy the oil vapor in the vent pipe to prevent it from being discharged into the atmosphere.
The effectiveness of the Stage II oil vapor recovery facility is less than half of expectations. Stage III liquefaction equipment must be installed to prevent environmental pollution and to recover gasoline.
Oil vapor emitted from gas stations is a toxic substance that is very harmful to the human body, and since gas stations are operating near large-scale residential areas, efforts have been made to solve this problem from the very beginning. A representative among them is the oil vapor recovery system called Stage II(Phase II).
This stage II recovery facility refers to an oil vapor recovery system that sucks oil vapor from the vehicle's tank and sends it to the gas station's underground tank when refueling the vehicle. With this facility, there is almost no odor when refueling the car. This is because the fuel gun for refueling has two pipes, one to expel oil and one to suck in oil vapor.
Basically, it is true that this system provides very beneficial effects for the health of gas customers and those who work at gas stations. In addition, it provides the effect of preventing oil vapor from spreading in all directions near the gas station and directly spreading to the residents of large cities.
However, the problem is that the recovered oil vapor is not liquefied immediately after being collected into an underground tank. If it is still in a gaseous state without being liquefied, the temperature rises and the kinetic energy of the gas is accumulated, and eventually it is discharged to the outside through the ventilation pipe.
It would be good to seal it so that it does not discharge to the outside, but the oil vapor has a high risk of explosion and cannot be kept sealed. Therefore, the ventilation pipe is always developed to the outside, and the oil vapor is always discharged to the outside. This structure is the same for all gas stations around the world.
Therefore, a liquefaction system must be added for the Stage II recovery plant to function properly. If the liquefaction system is connected to the ventilation pipe and liquefied before being discharged, the oil vapor can be recycled as a valuable gasoline resource, and environmental pollution can be completely prevented.
Currently, about 3800 gas stations in Korea have stage II recovery facilities installed, and stage III liquefaction equipment is not provided, so only half the effect is exhibited. The gas miner we developed is an oil vapor liquefaction device that most reliably solves the problem of air pollution at gas stations, and it is the most economical stage III recovery system in the world.
Contact
Tel. +82-10-2246-5729
Mail. limyh@emglobal.biz
Addr: Incheon, Korea
