Ultra-low Temperature Vapor Recovery Equipment

Shandong Kosman Environmental Technology Co., Ltd. is one of the leading manufacturers and suppliers of ultra-low temperature vapor recovery equipment 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 ultra-low temperature tertiary Vapor recovery device is a highly efficient and environmentally friendly equipment designed to address the problem of Vapor volatilization in storage tanks at gas stations, oil depots, and other similar locations. This product utilizes deep condensation technology (reaching temperatures as low as -75℃ to -115℃), employing a multi-stage cascade refrigeration process to fully liquefy and recover light hydrocarbon components in the Vapor , ensuring that the treated exhaust gas meets emission standards.

 

The product complies with the requirements of the "Emission Standard of Air Pollutants for Gas Stations" (GB 20952-2020), with a treatment efficiency ≥95% and an emission concentration ≤25g/m³, making it an ideal choice for gas stations to achieve environmental compliance and resource recovery.

Note: The suffix W indicates water-cooled type, and EX1 indicates explosion-proof type; models with a minimum temperature of -115℃ can be customized.

2.1 Detailed Technical Specifications

The above parameters are based on mainstream product specifications; specific configurations may vary depending on the manufacturer.

3.1 Technical Principles

This device employs multi-stage cascade condensation technology, utilizing the principle of differences in saturated vapor pressure of different hydrocarbon components at different temperatures. Through staged cooling, light hydrocarbon components in the Vapor are condensed from a gaseous state to a liquid state, achieving resource recovery.

Core Technical Advantages:

High efficiency and good economy in treating high-concentration organic gases using the condensation method.

Most of the light hydrocarbon components in the Vapor can be recovered through multi-stage condensation.

Liquid oil products can be directly obtained, with a clear recovery effect.

3.2 Workflow

Step 1: Pressure Detection and Automatic Start-up

The device monitors the pressure inside the oil storage tank in real time using pressure sensors. When the pressure reaches the preset start-up value (usually +150Pa), the PLC control system automatically starts the equipment.

Step 2: Vapor Extraction and Primary Condensation

The explosion-proof compressor extracts the Vapor mixture from the upper space of the oil storage tank and sends it to the primary condensation system (0℃) for preliminary cooling and dehumidification.

Step 3: Secondary Deep Condensation

The gas enters the secondary condensation system, where the temperature drops to approximately -40°C. Most of the C4 and higher hydrocarbon components condense into liquid oil.

Step 4: Tertiary Cryogenic Condensation

The gas enters the tertiary condensation system, where the temperature drops to -75°C to -115°C. Further condensation and recovery of light hydrocarbon components are achieved, with a total recovery rate exceeding 98%.

Step 5: Gas-Liquid Separation and Liquid Oil Recovery

The liquid oil settles in the evaporator and is transported to a recovery storage tank via an automatic drainage device. An optional recovery transfer pump can be used to directly return the recovered oil to the storage tank.

Step 6: Exhaust Gas Emission

The treated clean air is heated by a heat exchanger to meet emission standards, preventing icing on the exhaust pipe.

Step 7: Automated Defrosting Control

The system can automatically control defrosting based on pressure monitoring, ensuring continuous and stable equipment operation.

4.1 Advanced Refrigeration System
Compressor: Emerson Copeland scroll flexible compressor, high refrigeration efficiency and stable operation.
Explosion-proof Treatment: Explosion-proof compressors are encapsulated with epoxy resin, intrinsically safe.

4.2 High-Efficiency Heat Exchange System
Heat Exchanger Material: SUS304 stainless steel, excellent corrosion resistance
Optimized Heat Exchange Area: 30m³/h model with 3m²×2 heat exchange area, 50m³/h model with 5m²×2 heat exchange area
Energy-Saving Design: Multi-stage heat exchangers for step-by-step energy recovery, reducing system energy consumption

4.3 Intelligent Control System
Controller: Siemens PLC controller, fully automatic operation
Human-Machine Interface: 7-inch color touchscreen, intuitive operation

Pressure Monitoring: Pressure monitoring and protection at the inlet and outlet of primary and secondary evaporators to prevent ice blockage
Data Recording: Real-time monitoring of tank pressure, number of runs, running time, energy consumption, recovery volume, etc.

4.4 Safety Protection Design
Cold Box Pressure Resistance: 8 bar design pressure to ensure system safety
Explosion-proof Configuration: Optional explosion-proof type (EX1 suffix), Ex d IIB T4 explosion-proof rating
Automatic Defrosting: Automatic defrosting control based on pressure monitoring
Leakage Protection: Sealing design conforming to national standards

4.5 Environmental and Energy-Saving Benefits
High Recovery Rate: Vapor recovery rate ≥98%, liquid gasoline recovery rate ≥95%
Compliant Emissions: Emission concentration far below the national standard limit of 25g/m³
Carbon Reduction: Equipped with real-time carbon reduction data monitoring
Remote Management: Supports 4G IoT and cloud-based maintenance management

6.1 Selection Recommendations

6.2 Cooling Method Selection

Air-cooled (no suffix): Suitable for areas with scarce water resources, easy to install.

Water-cooled (W suffix): Suitable for locations with circulating cooling water, higher efficiency.

Water-cooled type requires cooling water: 1800L/h (30m³/h model) or 3000L/h (50m³/h model), 1-4 bar, G3/4 interface.
 

6.3 Explosion-proof Requirements Selection

Standard type (no EX1 suffix): Suitable for ordinary gas station environments.

Explosion-proof type (EX1 suffix): Suitable for locations with strict explosion-proof requirements (compressor epoxy resin encapsulation).

Specific pricing and delivery time are subject to actual inquiry.

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

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