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97% Efficiency Methane Gas Recovery System Unit With Custom Design

97% Efficiency Methane Gas Recovery System Unit With Custom Design

97% Efficiency Methane Gas Recovery System Unit With Custom Design

Product Details:

Place of Origin: China
Brand Name: QIYAO
Certification: ISO, ASME

Payment & Shipping Terms:

Minimum Order Quantity: 1 set
Price: Customized Product, Quoted Case By Case
Packaging Details: Seaworthy packing
Delivery Time: 120 days
Payment Terms: T/T, L/C
Supply Ability: 20 sets per year
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Detailed Product Description
Material: Carbon Steel, Stainless Steel Application: For Vapor Recovery Of Highly Volatile Liquid During Loading/unloading Process
Efficiency: Over 97% Valuable Composition In The Vapor Can Be Recovered Service: Design, Engineering & Supply With Site Supervision
Customized: Available
High Light:

vapor recovery unit


flare gas recovery system

Absorption-membrane-Adsorption Technology for Vapor Recovery Unit



Vapor Recovery Unit is to collect the organic vapor discharged during the manufacturing, storage, loading and unloading processes of various industries and recycle it by means of condensation, adsorption, absorption, membrane separation, etc. so as to finally satisfy the emission standards and create certain economic benefits for the end user.


The Membrane Separation Process separates different composition taking advantage of their ability of penetrating the membrane. The Absorption–membrane–Adsorption Technology is suitable for treatment of medium to high concentration oil vapor, with no limitation to flow volume and vapor types. It is featured by small footprint.



Principle / Flow Procedure

The Membrane Separation Process separates different compositions taking advantage of different diffusion coefficient in membrane. As special polymeric membrane allows oil vapor to penetrate first, when the gas mixture is driven by pressure difference, the oil vapor penetrates the membrane and get recovered while air or nitrogen is blocked.

The associated gas is pressurized by a liquid ring compressor and led into the absorption tower for touch with the opposite flowing absorbent, then most of hydrocarbon composition shall be dissolved and absorbed;

The oil gas mixture pressurized by liquid ring compressor flows into the absorption tower and is exposed to absorbent flowing in opposite direction, where most hydrocarbon compositions are dissolved and absorbed. The remaining oil gas mixture of low concentration flows out of the tower from the top and enters the membrane system. High concentration oil gas penetrating the membrane returns to the absorption tower, while the air or nitrogen containing little oil vapor blocked by the membrane is delivered into small adsorption tank for further treatment. The Desorption Process adopts the dry screw vacuum pump for vacuum desorption. The oil vapor desorbed will be led into the absorption tower for further treatment.




Structure & Parameter (typical project)

Application Vapor recovery
Equipment name Vapor Recovery Unit
Model QY/VR series
Capacity 200-5000 m3/h
Structure Skid-mounted
Material Carbon steel
Fabrication code GB150.1~4-2011
Design code



Design pressure Micro positive pressure
Design temperature Ambient
Applicable exhaust gas Medium-high concentration oil vapor
Type of membrane Organic composite membrane
Type of compressor Liquid ring type
Type of vacuum pump Dry screw vacuum pump
Type of absorption tower Atmospheric pressure packed tower
Type of packing High efficiency structured packing
Type of adsorption tank Vertical atmospheric pressure tank
Type of adsorption Coal-base activated carbon
Control method PLC automatic control
Main measuring points Pressure signal, level signal, flow signal, temperature signal
Main interlocked alarm system Pressure signal for interlocked blower start-up/shut down; Level signal for interlocked drain pump start-up/shut down; Flow signal to control opening of absorbent liquid valve; Temperature alarm for interlocked emergency shut down; Concentration alarm of flammable or toxic gas
Type of connection Bolted
Type of seal Flange
Utility consumption

Instrument air: ≤10Nm3/h

Absorption liquid: relevant to capacity;

Nitrogen: for purge



Benzene ≤ 4mg/m3,

Toluene ≤ 15mg/m3,

Xylene ≤ 20mg/m3,

Ethylbenzene ≤ 100mg/m3,

Acetonitrile ≤ 50mg/m3;

Non-methane total hydrocarbons:

- Removal rate ≥ 97%,

Concentration of emission ≤ 120mg/m3

Noise ≤ 85dB (A)
Height of exhaust gas funnel 15 m
Service life 25 years
Membrane life 3 years
Activated carbon life 8 years
Spare parts Available for 2 years
Warranty 12 months since start-up or 18 months since arrival of equipment
Scope of work / service Full equipment package, supervision for site installation & commissioning, training for operation
Response upon request Within 12 hrs





  1. Software: ASPEN for process calculation, SW6 for equipment calculation, 3D CADworx for design of the skid;
  2. High efficiency organic composite membrane featured by high recovery rate
  3. High efficiency structured packing and low absorbent consumption;
  4. Multi point temperature monitor on the adsorption tank, equipment safety shall be assured;
  5. Dry screw vacuum pump used for desorption, high vacuum degree, no contamination of oil or water, wear free operation;
  6. Delivered as a skid to reduce site installation work;
  7. Fully sealed blower and flanged connection in the skid to achieve zero leakage
  8. ExdIIBT4 or ExdIICT4 explosion proof




Applied data for an typical project

  • Concentration of emission: Compliance with GB31570-2015 <Standard of pollutant emission for oil refinery industry>, GB31571-2015 <Standard of pollutant for petrochemical industry> and the related local standard.
  • Details:

Benzene ≤ 4mg/m3,

Toluene ≤ 15mg/m3,

Xylene ≤ 20mg/m3,

Ethylbenzene ≤ 100mg/m3,

Acetonitrile ≤ 50mg/m3;

Non-methane total hydrocarbons:

          ---Removal rate ≥ 97%,

         ----Concentration of emission ≤ 120mg/m3;

Noise (1m from VRU): ≤ 85dB (A)

Height of exhaust port: ≥ 15m.



97% Efficiency Methane Gas Recovery System Unit With Custom Design

97% Efficiency Methane Gas Recovery System Unit With Custom Design

Contact Details
Shanghai Marine Diesel Engine Research Institute

Contact Person: Mrs. Tan Ling

Tel: 86-21-51151156

Fax: 86-21-51711742

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