Which of the three VOCs treatment processes is most suitable for your factory?

Which of the three VOCs treatment processes is most suitable for your factory?

Many enterprises in the choice of VOCs processing equipment, in the faceactivated charcoal、RTOMembrane condensation, these mainstream processes, often do not know how to choose. In fact, there is no absolute good or bad, the key depends on whether it is suitable for their own exhaust gas conditions. The following is a clear explanation of the advantages and disadvantages of the three processes and the applicable scenarios, which you can judge by comparison.

Activated carbon adsorption is the lowest investment process, a set of small equipment can be bought 10 thousands or 20 thousands, installation is also fast. But it has an obvious short board activated carbon saturation fast, replacement frequently. Take the medium-concentration waste gas as an example, it may be necessary to change the carbon once a week or two, plus the cost of hazardous waste disposal, it is normal to spend more than 100,000 yuan a year. Moreover, activated carbon adsorption only transfers the organic matter in the exhaust gas to the carbon, and does not really eliminate it. The waste carbon that is replaced will eventually need to be treated. Therefore, this process is suitable for scenes with small air volume, low concentration, intermittent emission and low environmental protection requirements. If it runs continuously for a long time, the later cost is the highest.

RTO heat storage oxidation is one of the most efficient processes, up to more than 95%, is not sensitive to the composition of exhaust gas, and is suitable for continuous discharge of large air volume. However, its investment and operating costs are very high. A set of equipment is hundreds of thousands to two million. When treating low-concentration exhaust gas, it needs to continuously supplement natural gas, and the annual gas cost is hundreds of thousands or even millions. The key is that RTO burns all the organic matter and there is no recycling income. Suitable for large air volume, low concentration, no recovery value, only need to meet the discharge of large projects.

Membrane condensation recovery is a rapidly developing process in recent years, which converts the organic solvent in the exhaust gas into liquid through multi-stage condensation and recovers the uncondensed exhaust gas.gas separation membraneFurther enrichment through recycling. It runs on electricity only, without burning gas. The membrane modules need to be replaced every three to five years, so there’s no hassle of frequent consumable replacements. The purity of the recovered solvent can reach more than 90% and can be directly reused or sold for money. The equipment adopts skid-mounted design, with small footprint and fast installation. The disadvantage is that the initial investment is medium, not suitable for the concentration of exhaust gas is too low. Suitable for medium and high concentration, recovery value of solvent waste gas, such as chemical, pharmaceutical, printing, coating, electronics and other industries.

To sum up, if you have a small air volume, low concentration, and limited budget, activated carbon can be an emergency, but you must be prepared to spend money for a long time. If it is large air volume, no recovery value, and needs to be stable and up to standard, RTO is a mature choice but the gas cost is not low. If your exhaust gas concentration is more than one or two grams per cubic meter, and the solvent has recovery value, membrane condensation is a solution that takes into account both standards and benefits, and the investment can usually be recovered in one to two years. It is suggested to find a manufacturer to measure the exhaust gas data first, and then make a plan according to the actual situation.

LuoyangWohong PetrochemicalEquipment Co., Ltd. focuses on membrane condensation recovery process, providing free working condition analysis and scheme design. The company is located at W2-1, Dongda Science and Technology Industrial Park, Luoxin Industrial Cluster Zone, Xin’an County, Luoyang City. Website: www.wohongshihua.com.