Activated Carbon Adsorption Desorption + CO Catalytic Combustion

Activated carbon adsorption and desorption + CO catalytic combustion waste gas treatment process generally requires the use of spray tower + dry filter as pre-treatment; process is a combination of activated carbon adsorption and desorption device + CO catalytic combustion equipment, high purification efficiency, is currently widely used in one of the waste gas treatment process.

Working Principle

After pre-treatment, the organic waste gas passes through the activated carbon adsorber, and the VOCs are adsorbed and intercepted by the activated carbon adsorbent, and discharged according to the standard. Adsorbent adsorption saturation, through the valve switch, the introduction of small air volume of hot air for high-temperature blowback desorption, desorption out of the high concentration, small air volume concentration of waste gas, into the catalytic burner combustion treatment, the release of a large amount of heat and reuse system.

Work steps

①Pre-treatment: The organic waste gas with large air volume and low concentration (<400mg/m3) generated in the workshop enters into the water washing spraying demisting by the pipeline, and then goes through the dry filtration to remove most of the particles.

②Adsorption and concentration:After pre-treatment VOCs gas, it is adsorbed through the activated carbon layer to provide high VOCs removal rate and meet the standard discharge.

③High temperature desorption + catalytic combustion (CO): VOCs in the exhaust gas are concentrated on the surface of the activated carbon, and a small airflow of approximately 100°C is provided by a mixing heater to perform reverse desorption. Desorption out of the high concentration, small air volume concentration of exhaust gas sent to the catalytic combustion furnace (CO) catalytic combustion decomposition into CO2 and H2O, combustion exothermic reuse, energy saving!

Process characteristics

1 . Convenient operation: the equipment works to achieve automatic control.
2 . Low energy consumption: it takes only 15-30 minutes to warm up the equipment to the ignition temperature, and the energy consumption is only the power of the fan, which is automatically compensated when the concentration is low.
3 . Safe and reliable: the equipment is equipped with fire retardant dust removal system, explosion-proof pressure relief system, over-temperature alarm system and advanced automatic control system.
4 . Small resistance, high purification rate: the use of today's advanced precious metals palladium, platinum impregnated honeycomb ceramic carrier catalyst, large specific surface area.
5 . Waste heat can be reused: the waste heat can be returned to the baking channel to reduce the power consumption in the original baking channel; it can also be used as heat source in other aspects.
6 . Small footprint: only 70%~80% of similar products in the same industry, and there is no special requirement for equipment foundation.
7 . Long service life: the catalyst is generally replaced in 8000 hours, and the carrier can be regenerated.

Features of honeycomb activated carbon for adsorption and desorption

Cellular activated carbon has a large specific surface area, microporous structure, high adsorption capacity, high surface activated carbon products, commonly used in waste gas treatment. Cellular activated carbon adsorption method is selected, that is, the exhaust gas and the porous activated carbon with a large surface contact, the pollutants in the exhaust gas are adsorbed and intercepted, so as to play a purifying role. Honeycomb activated carbon is used in a large number of low concentration, large air volume of all kinds of organic waste gas purification system. The treated waste gas can fully contact with the activated carbon when passing through the square holes of the honeycomb activated carbon, with high adsorption efficiency, small wind resistance coefficient, excellent adsorption, desorption performance and gas dynamics performance, which can be widely used in organic gases, malodorous gases and gases containing traces of metals. The environmental protection equipment using honeycomb activated carbon exhaust gas treatment and purification efficiency is high, the adsorption bed volume is small, low energy consumption of the equipment, can reduce the cost and operating costs.

Adsorption desorption using honeycomb activated carbon features

Activated carbon fibre is made of natural fibre soaked with flame retardant, low-temperature carbonization, high-temperature activation, the main component is elemental carbon, graphite-like microcrystalline chips in a chaotic form of stacking, microporous into a V-shape with the traditional granular carbon compared to the easier adsorption and resolution.

①Large adsorption capacity: for organic gases and malodorous substances (such as n-butyl mercaptan) adsorption of the amount of carbon than ordinary particles several times to dozens of times the effect of inorganic gases also has a very good adsorption capacity.

② Fast adsorption speed: the adsorption speed of activated carbon fibre to gas is very block, its adsorption rate is 2-3 times higher than GAC.

③Fast desorption speed: in the process of multiple adsorption and desorption, the original adsorption performance can still be maintained, with 120-150 degrees of hot air treatment, the time required is only 30-50 minutes can be completely resolved.

Heat resistance is very good: in the inert gas high temperature resistance of more than 800 degrees, in the air fire point reaches about 500 degrees.

Scope of application

Automobile and parts manufacturing, hardware machinery manufacturing, furniture manufacturing, ink and paint manufacturing, printing, coating, pharmaceutical, chemical, PCB, semiconductor, electronics, toys, plastics, leather, shoes, rubber, textile printing and dyeing, and other industries, such as workshop generated by the large air volume of the low concentration of VOC organic waste gas treatment.

Treatment components include: benzene, toluene, xylene, triphenylene, styrene, warp, alcohol, ether, phenol, ketone, ester, and other VCOs.

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