Three-stage Condensate Recovery Unit

Shandong Kosman Environmental Technology Co., Ltd. is one of the leading manufacturers and suppliers of three-stage condensate recovery unit in China. Please feel free to buy premium equipment for sale here and get pricelist from our factory. All customized products are with high quality and low price.

The three-stage condensation Vapor recovery unit is specialized environmental protection equipment that utilizes multi-stage gradient cooling technology to recover volatile organic compounds (VOCs) by condensing them from the gas phase into a liquid state. The unit employs a three-stage cascade condensation system, liquefying and separating various hydrocarbon components from the Vapor stream sequentially through progressive cooling.

Compared to single-stage or two-stage condensation, the three-stage condensation process utilizes a more refined temperature gradient design, capable of lowering system temperatures to between -75°C and -115°C, thereby significantly increasing the recovery rate of light hydrocarbon components. This product is widely used for high-concentration VOC treatment and resource recovery in sectors such as gas stations, oil depots, refining and petrochemical enterprises, and the chemical and pharmaceutical industries.

2.1 Core Working Principle

Condensation-based recovery relies on the principle that the saturated vapor pressure of a substance varies with temperature; by lowering the temperature, the vapor pressure of hydrocarbon components in the Vapor stream reaches a state of supersaturation, causing them to condense into liquid and separate out.

The three-stage condensation unit utilizes multi-stage cascade refrigeration technology, employing three independent refrigeration cycles to supply cooling at different temperature levels to three separate condensation channels. During operation, high-temperature, high-pressure refrigerant gas discharged from the compressor enters the condenser and is condensed into high-pressure liquid. It then passes through an expansion valve, undergoing throttling and pressure reduction to become a low-temperature, low-pressure gas-liquid mixture before entering the evaporator. There, it absorbs heat from the Vapor stream and vaporizes, after which it is drawn back into the compressor to begin the next cycle. The entire system continuously repeats this process to achieve the ongoing cooling and recovery of Vapor.

2.2 Three-Stage Cascade Condensation Process

Certain high-end configurations allow for four-stage cryogenic cooling down to -115°C to further capture low-boiling-point components.

• High recovery efficiency: Three-stage progressive cooling design recovers the vast majority of hydrocarbon components (C3 and heavier), achieving a recovery rate exceeding 93%.
• Direct results: Recovers liquid products directly with precise on-site metering; recovered materials can be reused immediately.
• Inherent safety: Explosion-proof design with no high-temperature combustion processes; suitable for flammable and explosive environments.
• Stable operation: Dual-channel anti-icing design ensures uninterrupted, long-term continuous operation.
• No consumable costs: No need to replace activated carbon; no hazardous waste disposal fees.
• Ease of operation: Fully automatic PLC control with one-touch start/stop and remote monitoring capabilities.
• Skid-mounted design: Compact structure with a small footprint, facilitating easy transport and rapid installation.
• Wide range of media: Capable of processing various VOC gases, including hydrocarbons, aromatics, alcohols, ketones, and esters.

Applicable media: Organic gases including hydrocarbons, aromatics, alcohols, ethers, ketones, and esters-such as gasoline, crude oil, diesel, benzene, toluene, xylene, styrene, naphtha, methanol, ethanol, acetone, and ethyl acetate.

Specific prices and delivery times are subject to actual quotation.

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