|Place of Origin:||CHINA|
|Minimum Order Quantity:||1 unit|
|Price:||Customized Product, Quoted Case By Case|
|Packaging Details:||Seaworthy packing|
|Delivery Time:||4-8 months after PO|
|Payment Terms:||L/C, T/T|
|Material:||Carbon Steel||Application:||Recovery Of Low To Medium Concentration Oil Vapor|
|Structure:||Skid-mounted||Warranty Period:||12 Months Since Operation Or 18 Months Since Delivery|
Absorption Technology Voc Treatment System For Low Medium Concentration Vapor Recovery
Absorption 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 Absorption Process is suitable for treatment of low & medium concentration oil vapor. As long as proper absorbent is available at site, absorption process is recommended owing to the easy operation and reduced investment.
Though usually applied in combination with other process, the absorption process can also be solely applied for treatment of substances easily soluble in water, acidic or alkaline liquid. For instance, it can use water to handle waste gas containing methanol, acetic acid, ammonia, acetone, etc. to make it acceptable for the emission standard.
Taking advantage of different solubility of different compositions, The Absorption Process can separate those easily soluble compositions from others. Most light hydrocarbons dissolve into the absorbent and waste gas containing little light hydrocarbons is discharged from the top of the tower. For different types of oil vapor, the absorbents can be water, acidic aqueous solution, alkaline aqueous solution, gasoline, diesel and heavy hydrocarbon, etc. More explanation about the process will be given taking methanol recovery with water absorption technology for example.
The oil vapor after flame arrester is pressurized by an induced fan and then delivered into the absorption tower, where it contacts the absorbent liquid (water) flowing in opposite direction for vapor-liquid equilibrium. Acceptable emission is obtained after multi-stage equilibrium and discharged from the top, while the liquid with rich methanol leaves from the bottom.
|Applicable exhaust gas||Low & medium concentration oil vapor|
|Type of absorption tower||Atmospheric pressure packed tower|
|Type of packing||High efficient structured packing|
|Control method||PLC automatic control|
|Main measuring point||Pressure signal, level signal, flow signal|
|Main chain 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|
Instrument air: ≤10Nm3/h
Absorbent liquid: relevant to capacity
|Noise||≤ 85dB (A)|
|Stack height||15 m|
|Service life||25 years|
|Warranty||12 months after start-up of 18 months after arrival of equipment|
6) ExdIIBT4 or ExdIICT4 explosion proof.
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.
Benzene ≤ 4mg/m3,
Toluene ≤ 15mg/m3,
Xylene ≤ 20mg/m3,
Ethylbenzene ≤ 100mg/m3,
Acetonitrile ≤ 50mg/m3;
Acetone ≤ 100mg/m3,
Phenol ≤ 20mg/m3,
Methanol ≤ 50mg/m3;
Non-methane total hydrocarbons:
Noise (1m from VRU): ≤ 85dB (A)
Height of exhaust port: ≥ 15m.