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How Do Resin Vessels Facilitate Organic Solvent Recovery? An Explanation of the Adsorption and Desorption Process

Industrial Exhaust Gas Treatment Equipment

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How Do Resin Vessels Facilitate Organic Solvent Recovery? An Explanation of the Adsorption and Desorption Process

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The resin vessel adsorbs and concentrates organic components from waste gas by passing the stream through an internal bed of macroporous resin. During the adsorption phase, the organic-laden waste gas enters the vessel, is distributed uniformly by an internal gas-distribution assembly, and flows through the resin bed; the treated gas is then discharged. Once the resin reaches the point requiring regeneration, the system switches to the desorption phase. Steam or heated nitrogen is introduced to desorb the captured organic solvents, which are subsequently recovered—typically through a condensation process. Following desorption, the vessel is cooled (using water) and returned to the adsorption cycle. A multi-vessel configuration allows for continuous operation across various industrial processes; the actual recovery efficiency and operational cycle depend on factors such as the composition of the waste gas, the specific properties of the resin, and the overall system configuration.

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How should the material for a resin tank be selected?

The selection of materials must take into account the presence of acidic, alkaline, or corrosive components in the exhaust gas, as well as factors such as temperature, pressure, and chloride ion concentration. Carbon steel is a cost-effective option suitable for standard operating conditions. Whether stainless steel or 2205 duplex stainless steel is appropriate depends on the specific medium and corrosive environment; a general label of "corrosion-resistant" is insufficient for making a final selection.

What are the materials and specifications for resin tanks?

The vessel can be constructed from carbon steel, 304 or 316L stainless steel, or 2205 duplex stainless steel; the internal screen assembly and vessel dimensions can be customized according to project requirements. The RG-500, RG-1000, and RG-1500 models listed have air handling capacities of 1,000, 3,000, and 5,000 m³/h, respectively. Operating pressures and material specifications vary by model; please refer to the finalized technical proposal for specific details.

Can the resin tank operate continuously?

Multiple vessels can be operated in an alternating sequence—integrating adsorption, desorption, and cooling stages—to meet the requirements for continuous operation. The number of vessels required and the switching cycle are determined based on the exhaust gas flow rate, the adsorption capacity of the resin, and the regeneration process.

How do resin tanks adsorb and recover organic solvents?

Organic waste gas enters the vessel and passes through a resin bed, where organic components are adsorbed by the macroporous resin, and the treated gas is then discharged. Once the resin becomes saturated, it can be regenerated (desorbed) by introducing steam or hot nitrogen; the desorbed solvents are subsequently recovered via condensation. Following desorption, the resin bed is cooled with water, and the vessel returns to the adsorption operating mode.

What are resin tanks primarily used for?

The resin vessel is packed with macroporous resin, designed for the adsorption of gaseous media. In exhaust gas treatment, it can be used for the adsorption and enrichment of organic waste gases, as well as for the recovery of organic solvents. Its specific applicability depends on the composition of the waste gas and the type of resin used.

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