Waste Gas Abatement
Reducing Environmental Impact with Transforming Emissions into Opportunities
01
Activated Carbon Adsorption-Desorption Catalytic Combustion Treatment
This is an integrated technology that combines adsorption-desorption with catalytic combustion or condensation. It converts high-volume, low-concentration organic waste gas into low-volume, high-concentration organic waste gas through the process of adsorption-desorption. Desorption processes include hot air desorption, steam desorption, nitrogen desorption, and so on.
Using the adsorption and desorption capabilities of high molecular weight materials such as activated carbon, macroporous resin, and zeolite wheel, VOC molecules in organic waste gas are adsorbed into the activated pores of activated carbon, and then the saturated activated carbon is used to blow back the VOC molecules from the fine pores of high molecular weight materials such as macroporous resin and zeolite wheel under high temperature and pressure gas, achieving an automatic cleaning and recycling effect of activated carbon. The desorbed organic waste gas (VOCs) molecules enter the catalytic combustion reactor (RCO) for catalytic combustion or enter the condenser for condensation and centralized treatment or utilization.
The adsorption-desorption process is effective for treating organic waste gases such as benzene, alcohols, ketones, esters, and gasoline. This technology has high purification efficiency, no secondary pollution, and low energy consumption. Equipment operating costs and maintenance are low, and operation is reliable.
02
Acid-Base Exhaust Gas Treatment
After the exhaust gas generated in industrial production is introduced into the scrubber by the power of the ventilation fan, it passes through the packing layer. The scrubbing liquid is evenly sprayed onto the surface of the packing layer by the circulating water pump to maintain wetness. At the same time, the exhaust gas is fully contacted with the wetted packing layer, and under the physical collision
and chemical absorption, the pollutants in the exhaust gas are absorbed into the scrubbing liquid, achieving the purpose of removing the exhaust gas.
Then, the exhaust gas containing water is passed through the demisting layer at the top of the scrubber to remove excess water. The cleaned exhaust gas after absorption and removal of excess water by the scrubber can be discharged into the atmosphere. The scrubber is generally made of corrosion-resistant materials such as PP, FRP, and 304 stainless steel. This equipment has the characteristics of wide application, simple structure, low pressure drop, and high absorption efficiency.
03
UV light, ozone, photocatalytic, low-temperature plasma treatment
UV photocatalytic oxidation technology utilizes a specially designed high-energy light beam to irradiate odorous gases, cracking odorous gases such as ammonia, trimethylamine, hydrogen sulfide, methyl mercaptan, methyl sulfide, dimethyl disulfide, carbon disulfide, benzene, toluene, and xylene, sulfide H2S, VOCs, etc., and molecular chain structure of organic or inorganic high-molecular-weight odorous compounds. Under high-energy
ultraviolet light irradiation, they degrade and transform into low-molecular-weight compounds, such as harmless substances such as CO2 and H2O.
Low-temperature plasma deodorization technology, also known as non-equilibrium plasma technology, generates a large number of high-energy electrons through dielectric discharge under the action of an external electric field. High-energy electrons undergo a
series of complex physical and chemicalreactions with VOC molecules, degrading organic pollutants into harmless substances.
04
Particulate Matters Removal
Wet Cyclonic Scrubber System
Evolved from the conventional tower scrubber and packed scrubber, wet cyclonic scrubber system employs multi-stage cyclone pneumatic concept to collect dust in gas stream. Owing to the design of multi-level cyclone pneumatic separators and multi-stage washing-absorption concept, the dust removal efficiency is improved. The optimized design of the nozzle and blade position as well as the selected material for construction being anti-corrosion and of smooth surface, potential scaling and blockage issues are eliminated.
Electrostatic Precipitator (ESP) System
Electrostatic precipitator (ESP) is a filter that uses static electricity to remove the fine particles or impurities from the exhaust gas. A high voltage is applied to the discharge electrodes to generate an electrical field. Particles in the exhaust gas are charged when passing this region and attracted to the grounded collecting plate (some will be attracted to the discharge electrodes), forming dust layers on the surface. Then the dust layer is removed through rapping the collecting plates and electrodes or by running water on the electrode surfaces.
DRY Electrostatic Precipitator
Dry electrostatic precipitator allows collected particulate to build-up in a layer on the collection surface, which is then removed via mechanical rapping or vibration. Various rapping methods exist including tumbling hammer, gravity impact, vibrators, pneumatic and drop rod rapping. The collected particulate falls into a hopper where it is collected and removed from the dry ESP with an ash handling system. Similar rapping systems are used on the discharge electrodes to minimize potential build-up that could inhibit corona generation.
WET Electrostatic Precipitator
In wet electrostatic precipitator , the collecting electrodes are cleaned via the use of intermittent water sprays or a continuous irrigation system preventing any build-up of particulate on the collecting electrode surface. The water washes away the collected particulate on the collection surface. The difference in cleaning has a significant impact on function, location, operating temperature, materials of construction and performance.
