High-Efficiency Volatile Organic Compound (VOC) Capture & Resource Recovery Solution

1. Executive Summary & Background

During oil and gas production, storage, transportation, loading, and unloading operations, light hydrocarbons continuously volatilize into the atmosphere. The unmanaged release of these hydrocarbon vapors leads to:

• Significant Product Loss: Loss of high-value light fuel components.

• Environmental Pollution: Emission of dangerous Volatile Organic Compounds (VOCs) contributing to smog, ozone creation, and air quality degradation.

• Safety & Health Hazards: Flammability risks and toxic health exposure to field operators and surrounding communities.

Our Vapor Recovery System is engineered to effectively isolate, recover, and liquefy VOCs from air-gas mixtures under controlled temperature and pressure conditions through physical separation techniques—primarily Adsorption + Absorption and Condensation + Absorption.

2. Industry Necessity & Compliance

Driven by strict environmental regulations and global carbon-neutrality initiatives, environmental authorities have mandated the installation of high-efficiency Vapor Recovery Units across bulk liquid storage tanks, truck loading racks, rail loading facilities, and marine terminals. Installing our VRU system ensures 100% environmental compliance, eliminates open emissions, and converts lost vapors back into usable fuel—delivering both environmental sustainability and measurable financial ROI.

3. Working Principle (Adsorption + Absorption Process)

1. Selective Adsorption: Vapor-laden air passes through specialized activated carbon beds. The activated carbon selectively adsorbs volatile organic molecules (VOCs) while clean, compliant air is safely vented into the atmosphere.

2. Vacuum Regeneration (Desorption): Once saturated, a state-of-the-art dry vacuum pump pulls a deep vacuum on the bed to desorb the captured hydrocarbon vapors, restoring the carbon’s adsorption capacity.

3. Absorption & Recovery: The rich, concentrated VOC vapor is directed to an absorption column. Using low-grade gasoline, light diesel, or kerosene from the tank farm as the liquid absorbent, the hydrocarbon gas is re-absorbed and safely returned to storage.

4. Key System Configurations

Each VRU system is fully automated and built with industrial-grade components:

• Dual Parallel Adsorption Tanks: Configured for alternating cycles (one adsorbing while the other regenerates) to guarantee uninterrupted 24/7 continuous operation.

• Imported Dry Vacuum Pump Unit: High-vacuum capability ensuring complete bed regeneration without oil contamination.

• Absorption Tower & Liquid Distributor: Designed for maximum gas-liquid contact efficiency.

• Circulating Oil Pump System: Delivers precise flow control for the absorbent liquid.

• Integrated PLC Control System: Fully automated operation with intuitive HMI touchscreens, real-time safety interlocks, and remote monitoring capabilities.

5. Technical Advantages & Product Highlights

• Superior Carbon Adsorbent: Utilizes custom-grade activated carbon featuring high adsorption capacity, high mechanical hardness, and exceptionally low pressure drop. The material maintains high structural integrity and operational stability over long service cycles.

• Energy-Efficient Vacuum Regeneration: Equipped with an imported dry vacuum pump paired with a Variable Frequency Drive (VFD). This setup delivers:

  • Deeper vacuum levels for thorough carbon regeneration.

  • Substantially lower power consumption and reduced mechanical wear.

  • Extended adsorbent lifespan and guaranteed long-term technical parameter stability.

• Tailor-Made Engineering: Custom-engineered according to client flow rates, gas composition, temperature, pressure, and site footprint requirements (no fixed standard constraints).

6. Applications & Usage Scenarios

Our Vapor Recovery Systems are widely deployed across the oil, gas, and petrochemical sectors, including:

1. Refineries & Fuel Storage Terminals: VOC recovery from gasoline, diesel, and crude oil tank truck, railcar, and marine loading/unloading facilities.

2. Oilfield Associated Gas Recovery: Capture and utilization of flared or vented associated petroleum gas (APG).

3. Chemical Gas Separation & Recovery: Efficient recovery and separation of volatile chemical gases including Benzene series (BTEX), Methanol, Solvents, and Alcohols.

4. Chemical Process Gas Management: Concentration control, gas separation, and loop recovery in organic chemical manufacturing lines.

5. Ultra-Low Emission Zone Control: Tailored solutions meeting the most stringent local and international environmental VOC emission standards (e.g., emission concentrations <20g/m³ or stricter).

Technical Specifications Summary

• Capacity: Fully customizable based on flow rate (m³/h) and VOC inlet concentration.

• Process Method: Adsorption + Absorption / Condensation + Absorption / Hybrid Membrane processes available.

• Control Level: Fully automatic PLC control (Ex-d / Ex-p explosion-proof compliant).