Membrane Separation and Condensation Combined Skid

Shandong Kosman Environmental Technology Co., Ltd. is one of the leading manufacturers and suppliers of membrane separation and condensation combined skid 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 membrane separation + condensation integrated skid-mounted oil vapor recovery system is a comprehensive VOC treatment unit that seamlessly combines compressed condensation and membrane separation technologies. At the front end, it liquefies and recovers most organic compounds from high-concentration oil vapors through compressed condensation; at the rear end, it utilizes the selective permeability of polymer membranes to purify and separate uncondensed tail gas. The concentrated gas is returned to the system for cyclic processing, while the purified air meets emission standards.

This product adopts a modular design, with the compressor, condenser, membrane module, vacuum pump, and control system all integrated onto a single steel base, fully assembled and calibrated before shipment. On-site operation requires only connecting the power supply and oil-gas pipelines along with the return oil line; installation takes days. It is widely used in applications such as tertiary vapor recovery systems at gas stations, oil dispensing stations in oil depots, chemical storage tank areas, and loading/unloading platforms.

Technical Overview: The pure condensation process requires cooling Vapor to-95°C or even-110°C to meet emission standards, demanding high-quality equipment materials and significant energy consumption. In contrast, the membrane separation combined with condensation process utilizes a membrane separation unit for deep exhaust gas purification, achieving condensation temperatures between-20°C and-30°C while significantly reducing overall energy consumption. Centered on physical separation, this technology is primarily designed for treating organic exhaust gases with medium-to-high concentrations that have recovery potential.

2.1 Core Process Route

This device employs a three-stage gradient treatment process involving compression, condensation, and membrane separation:

Stage 1 – Compression and Pressure Boost: The Vapor first enter the compression unit, where they are pressurized by the compressor to provide the necessary driving force for subsequent condensation and membrane separation.

Stage 2 – Condensation and Liquefaction: The pressurized gas enters the condensation unit, where it undergoes three-stage gradual cooling with temperatures progressively dropping from-20°C to-30°C. Most hydrocarbon components above C3 are liquefied into liquid oil products during this stage and flow from the bottom of the unit into the recovery tank. Under typical gas station operating conditions, the condensation section effectively condenses and liquefies the majority of hydrocarbon components containing C10–C22 in the gas stream.

Level 3 – Membrane Separation Purification: Uncondensed tail gas enters the membrane separation unit. Leveraging the differential permeation rates of organic vapors versus air through the membrane material, organic gas molecules preferentially pass through the membrane layer to form a concentrated stream, which is returned to the compressor inlet to be mixed with fresh waste gas for recirculation; air components such as nitrogen and oxygen are retained and discharged in compliance with standards. The entire system operates in a closed-loop cycle.

2.2 Core Technical Advantages of Membrane Separation

The principle of membrane technology for organic solvent recovery involves utilizing the differential permeability of polymer membrane materials to organic gas molecules versus air molecules, thereby achieving physical separation. Under pressure differentials across the membrane, the organic-gas-air mixture follows solute diffusion kinetics: organic gases preferentially permeate through the membrane and are enriched for recovery, while air is selectively retained.

Compared with traditional adsorption methods, the membrane separation system is an open system that eliminates safety hazards associated with phase-change heat generation of organic gases during operation, as well as the risk of explosion caused by sudden pressure fluctuations. Under normal operating conditions, the service life of membrane modules can exceed 3 years.

The modular combined membrane separation and condensation unit is primarily composed of the following components integrated onto a steel base:

4.1 General Technical Parameters

4.2 Processing Capability Series

This device offers multiple processing capacity specifications and can be customized according to project requirements.

Before selecting equipment, it is recommended to first conduct exhaust gas testing and match the device specifications based on oil/gas concentration, air flow rate, and component data.

High processing efficiency and excellent recovery performance: The membrane separation unit further concentrates and recycles low-boiling-point components in the condensed tail gas, achieving an overall recovery rate of over 99%, with emission concentrations significantly below national standard limits.

Low operating costs with no consumable requirements: The equipment is powered by electricity and does not consume natural gas. Compared to activated carbon adsorption processes, membrane separation does not generate secondary pollutants such as spent activated carbon and requires no solid waste treatment. No replacement of consumables like activated carbon is necessary during operation, nor does it produce hazardous waste. For every unit of electricity consumed, 2–3 liters of gasoline can be recovered.

Intrinsic safety with flame-free operation: The process operates without open flames, making it highly suitable for explosion-proof environments such as gas stations and chemical plants. The system lacks a combustion process, eliminating the risk of explosions caused by organic gases within their explosive limits.

Modular design for rapid deployment: All components are integrated into a single steel base and pre-assembled with complete debugging before shipment. On-site operation requires only power supply and piping connection, featuring short installation duration and compact footprint (typically under several square meters). The equipment can be fully lifted and relocated as needed later, ensuring reusability.

Automated operation without manual supervision: The PLC provides fully automatic control, enabling automatic start/stop based on system pressure-operating when gas is available and entering standby mode when gas is absent, thereby avoiding energy waste associated with continuous operation. This achieves fully automated, unattended operation with no emissions of any "three wastes" (waste gas, wastewater, or solid waste).

Flexible scalability with strong adaptability: offers high processing capacity that can be easily expanded by adding more membrane modules to meet varying production demands. The modular design allows flexible capacity expansion as needed.

The exact price and delivery schedule are subject to the actual inquiry results.

For more product details, technical solutions, or a quote, please contact us.

Hot Tags: membrane separation and condensation combined skid, China membrane separation and condensation combined skid manufacturers, suppliers, factory