Advanced Biogas Upgrading System Using Amine Scrubbing Technology Biogas Purification

• Customization: Available
• After-sales Service: Installation and Commission Guidance
• Warranty: 12 Month
• Automation: Automatic
• Screw: 0
• Treatment: Biological Treatment
• Method: Chemical Method
• Usage: Biogas, Landfill Gas,
• Motor: Explosion-Proof Certification
• Patent: Yes
• Transport Package: Standard Container
• Specification: Customized
• Trademark: Fairyland
• Origin: China
• Production Capacity: 100

Product Description

Principle:

Utilizing the chemical reaction between CO2 and solvent to form a rich liquid, then the rich liquid enters the flash tower and desorption tower for heating and decomposing CO2, and the absorption and desorption alternate to achieve the separation of CO2 and the recycling of the solution. The widely used method in industry is the amine method for decarburization, and its main reaction process is as follows:



Process:
After desulfurization and compression, biogas enters the biogas absorption tower after being dusted and oil-removed and is fully counter-currently absorbed by lean liquid and semi-lean liquid. Most of the CO₂ gas in the raw gas is absorbed, and the purified gas without CO₂ is cooled and dehydrated at the top of the tower to meet the relevant standards for natural gas. The impure purified gas is returned to the inlet of the compression unit.

The amine solution absorbs enough CO₂ from the raw gas to become a rich absorbent, which enters the top of the flash tower for spray flashing, and part of the CO₂ is released from the rich absorbent. The liquid after flashing part of the CO₂ in the flash tower is called semi-lean liquid. After being pressurized by a semi-lean liquid pump, a part of it is sent to the middle of the absorption tower for recycling absorption, and the other part is heated and regenerated in the regeneration tower after being exchanged heat.


Products Quality: Meet different natural gas standards, the main standard indicators are listed as follows:
 

Item	Parameters
Standard Code	GB 17820 Level 1	GB 17820 Level 2	GB 18047
Higher Calorific Value /(MJ/m^3)	≥31.4	≥31.4	≥31.4
Total Sulfur /(mg/m^3)	≤20	≤100	≤100
H2S/(mg/m^3)	≤6	≤20	≤20
CO2 mol:mol /(%)	≤3.0	≤4.0	≤4.0
O2 mol:mol /(%)	/	/	≤0.5
Remark: The standard reference conditions for gas volume are 101.325kPa and 20ºC.

  CH₄ yield: > 96%

Main equipment:
biogas compressor (optional, if there is free steam, atmospheric process can be chosen), absorption tower, regeneration tower, flash tower (optional), heat exchange system, amine solution and circulation pump, natural gas dehydration equipment, instruments.

Characters:

1. high quality of product gas
2. Large gas treatment volume
3. The regeneration and recycling operation of the absorbent is more complicated

   

Applications:

1. biogas gas has a large volume and stable flow rate
2. There is free or cheap steam

Reference ProjectProject:
    Project:Chongqing Biogas Purification Project
    Location: Chongqing
    Capacity: 10000/5000 Nm3/h
    Technology: BD-II & Amine Scrubbing
    CH₄ yield: >95%
    Operation: Since 2020