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Medium High Concentration Vapour Recovery System Absorption Membrane Adsorption Technology

Shanghai Marine Diesel Engine Research Institute

Medium High Concentration Vapour Recovery System Absorption Membrane Adsorption Technology

Price : Customized Product, Quoted Case By Case

Brand Name : QIYAO

Certification : ISO

Place of Origin : CHINA

MOQ : 1 unit

Payment Terms : L/C, T/T

Delivery Time : 4-8 months after PO

Packaging Details : Seaworthy packing

Material : Carbon steel

Function : Recover the valuable composition in medium-high concentration oil vapor

Structure : Skid-mounted

Warranty : 12 months since operation or 18 months since delivery

Packing : Seaworthy packing

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Absorption-membrane-Adsorption Technology for Vapor Recovery Unit

1. Summary

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.

2. 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.

Medium High Concentration Vapour Recovery System Absorption Membrane Adsorption Technology

3. Structure & Parameter (typical project)

Model QY/VR series
Capacity 200-5000 m3/h
Structure Skid-mounted
Material Carbon steel
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
Utility required

Instrument air: ≤10Nm3/h

Absorption liquid: relevant to capacity;

Nitrogen: for purge

Electricity

Noise ≤ 85dB (A)
Stack height 15 m
Service life 25 years
Membrane life 3 years
Activated carbon life 8 years
Warranty 12 months since start-up or 18 months since arrival of equipment

4. Advantage

  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;

6) Fully sealed blower and flanged connection in the skid to achieve zero leakage

7) ExdIIBT4 or ExdIICT4 explosion proof

5. 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.


Product Tags:

vapor recovery unit

      

vapour recovery system

      
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