Technology
—VOCs generated in production can be treated by condensation, adsorption, combustion, etc., based on gas concentration and flow. Choose methods with reference to the chart. |  |
Activated Carbon Adsorption System (ADS)
—TENZON ADS-G/C/F is a multi-bed system for adsorbing and concentrating low-concentration, high-volume organic gases. It combines adsorption, concentration, and thermal oxidation. Adsorbed gases are emitted to standards. Before saturation, desorption converts gases to high concentration for catalytic or thermal combustion, then emitted to standards. |
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technological process
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—Low-concentration gases are purified in activated carbon beds, converted to high-concentration gases, and sent to combustion beds for oxidation. Hot gases heat cold air via a heat exchanger, achieving waste heat utilization and energy saving. |
Molecular Sieve Rotor Adsorption Device (MSD)
—TENZON's MSD-P/D system uses zeolite to efficiently adsorb VOCs from large, low-concentration waste gases. It integrates adsorption, concentration, and thermal oxidation, converting gases to high concentration for oxidation, effectively utilizing heat from combustion.
process flow
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—VOCs-containing exhaust gases enter a zeolite rotor for adsorption, with purified gases being directly discharged. The rotor continuously rotates,and when the saturated zeolite segment reaches the desorption zone, desorption occurs. The desorbed gases are heated to 180°C and then further heated to 750°C in a combustion furnace, where they are completely decomposedinto CO₂ and H₂O through thermal combustion treatment. |
Catalytic Combustion Device (TCO/RCO)
—Catalytic combustion (Catalytic Oxidizers, CO) is one of the combustion treatment technologies. Its principle involves the complete oxidation of volatile organic compounds (VOCs) pollutants at a specific temperature and with the catalysis of specific catalysts, transforming them into carbon dioxide and water, with a removal efficiency of over 95%. This technology employs an indirect heat exchange method for the intake and exhaust air to minimize heat loss. Generally, the heat recovery efficiency of this type of catalytic combustion ranges from 40% to 65%.
—The heat exchange TCO and regenerative RCO catalytic combustion bed series equipment from Tenzon feature compact structure, high purification efficiency, and low operational costs. This equipment is suitable for situations where waste gas compositions frequently change or where waste gas concentrations fluctuate significantly due to varying products.
—Heat Exchange TCO: Organic waste gas, after being preheated through heat exchange, enters the electric heating chamber. The waste gas is then heated to approximately 300°C and sent into the catalytic combustion chamber. Under the catalysis of the catalyst, the high-temperature organic waste gas is decomposed into CO₂, water vapor, etc., and is subsequently exhausted through the chimney.
—Regenerative RCO: Organic waste gas first absorbs heat from the regenerative bed I, which has been stored during the previous cycle. After being heated up, it enters the catalytic bed and undergoes catalytic combustion at around 300°C-500°C, oxidizing and decomposing the organics into carbon dioxide and water. The heat generated from the combustion is then transferred to the regenerative bed I for storage. Once a cycle is completed, the direction of the gas inlet and outlet is switched, allowing the gas to absorb heat from regenerative bed I and store the heat released from the combustion reaction in regenerative bed II. By periodically changing the direction of the gas flow, the stability of the catalytic reaction is ensured, thereby guaranteeing the purification efficiency of the organic waste gas.
Thermal Combustion PAI/TNV
—PAI, which stands for Polluted Air Incinerator, is one of the equipment forms for waste gas treatment offered by Tenzon.
—The PAI flue gas outlet temperature is relatively high, so multi-stage heat exchangers are often connected at the tail end based on needs to realize functions such as providing heated air.
—Due to its unique characteristics that distinguish it from other combustion furnaces, PAI is often used for waste gas treatment and heat supply in painting and drying systems, commonly referred to as "one for three" (where one incinerator supplies heat to three or more heating furnaces).
—PAI and TNV share the same principle but differ in structure. The internal resistance of PAI is smaller than that of TNV, allowing the fan to consume less power.
—The furnace chamber of PAI is separated from the heat exchanger, and the heat exchanger does not come into contact with the flame, so it is not easily damaged by high temperatures. Due to the separation of the PAI furnace chamber and the heat exchanger, maintenance is easier and maintenance costs are lower, but the footprint is relatively larger.
—In PAI, the residence time of waste gas at 750°C can reach 1.0 second, with uniform mixing, resulting in a waste gas treatment efficiency of over 99%. In contrast, the residence time in TNV is around 0.5 seconds, leading to a slightly lower waste gas treatment efficiency. Therefore, fresh air furnaces using the PAI design are less prone to cold condensation and oil accumulation.
—RTO (Regenerative Thermal Oxidizer) is a regenerative oxidation/combustion furnace. Its principle involves oxidizing organic waste gases (VOCs) into corresponding oxides and water at high temperatures (about 760°C), thereby purifying the waste gases. The waste gas purification efficiency can reach over 99%, and the heat recovery efficiency can exceed 95%.
process flow
—Heat the organic waste gas to above 760°C to oxidize and decompose VOCs into carbon dioxide and water.
—The high-temperature gas produced by the oxidation flows through the ceramic thermal storage medium, causing the ceramic body to heat up and "store heat", with a heat recovery efficiency of approximately 95%.
—RTO design controls the three key factors well: temperature, residence time, and turbulence coefficient.
Applications and Related Cases
It can treat organic waste gases such as benzenes, ketones, alcohols, ethers, alkanes, and their mixtures;
It is mainly used for the purification of harmful waste gases generated in chemical, machinery, electronics, electrical appliances, coating, shoemaking, rubber, plastic, printing, and various industrial workshops.
 Tianjin Jinghengda Metal Heat Treatment Co., Ltd. has three box furnace heat treatment lines in its heat treatment workshop, including five multifunction furnaces (with one reserved interface), four tempering furnaces, and two air-cooled platforms. Waste gas capture and treatment are required for these facilities. |  A metal heat treatment company in Tianjin has three box furnace heat treatment lines in its heat treatment workshop, including five multifunction furnaces (with one interface reserved), four tempering furnaces, and two air-cooled platforms. Waste gas capture and treatment are needed for these facilities. |  This equipment company, as a modern enterprise integrating R&D and manufacturing, promoted strategic transformation, management reform, and deep integration of informatization and industrialization, forming a sustainable, benign, and high-speed enterprise development model. |
