CO₂ Recovery Unit for Brewery Fermentation Gas
Introduction
The device directly collects CO₂-rich fermentation gas (approximately 99% purity) from the top of the distillery's fermentation tanks. Through multiple precise steps (such as alcohol removal, deodorization, compression, drying, low-temperature liquefaction, and distillation), it removes trace impurities like alcohols, esters, and sulfides, ultimately producing food-grade liquid carbon dioxide that meets the national standard GB 1886.228-2016. The entire process can be fully automated and synchronized with brewing production.
Main function
Resource recycling
Recycling the fermentation byproduct CO₂ as the core product to directly create economic value.
Internal reuse
Provide low-cost, high-quality, and stable supply of carbon dioxide gas source for the carbonation process of the brewery itself (such as carbon filling before beer filling), ensuring consistent product taste.
Emission reduction and environmental protection
Significantly reduce direct greenhouse gas emissions, meet increasingly strict environmental requirements, and enhance the green image of enterprises.
Significant advantage
Significant cost advantage
Once the recycling device is put into operation, the marginal cost of self-produced carbon dioxide is extremely low (mainly electricity consumption), far lower than the cost of external purchases in the long run, and not affected by market price fluctuations.
Safe and reliable supply
Achieve self-sufficiency of critical raw materials (CO₂) and avoid production disruptions caused by external supply chain disruptions (such as winter transportation difficulties or "gas shortages" caused by chemical plant maintenance).
Quality and hygiene assurance
Self-produced and self used, with controllable quality and extremely short delivery paths, avoiding potential contamination risks during transportation and turnover of purchased products, and providing stronger traceability for food safety.
Environmental Protection and Social Benefits
It is a benchmark project for practicing carbon reduction and circular economy, which can effectively enhance the ESG (Environmental, Social, Governance) rating and brand image of enterprises.
Parameter Specifications
|
Production capacity |
Work pressure |
Final product dryness |
Liquefaction temperature |
cooling method |
Regeneration method |
|
145, 285, 500, 1000 kg/hour, customizable according to needs |
The compressed pressure is approximately 16 bar) |
Dew point after drying ≤ -60 ℃ |
Liquefie at -30 ℃ |
Supporting refrigeration or fluorine oil lubrication compressor unit |
• Activated carbon filter: regenerated through steam or hot air. • Drying machine: automatically regenerated through electric heating. |
(For Reference Only)
Main application industries
Its application is centered around the brewing industry and extends to other fermentation industries:
Core applications
Large brewing enterprises such as breweries, wineries, whiskey distilleries, etc.
Extended application
Any biological fermentation process that can produce high concentrations of CO₂ waste gas, such as alcohol plants, amino acid fermentation plants, food plants (such as bread yeast fermentation), etc.
Case analysis of CO₂ recycling factory
The CO₂ recovery plant (CBU) is completed using various fuels such as diesel, heavy oil, kerosene, and natural gas through combustion, washing, absorption, analysis, separation, and other process technologies. The system adopts centralized control to ensure system safety and stability. All instruments and meters are pre installed in the shell block, which is convenient for transportation and reduces on-site installation and debugging time. COz recycling factory production capacity: 25-1000kg/hr, other production capacities will be designed separately.
The system is based on the principles of MEA cooling absorption and heating analysis. The flue gas is first cleaned and cooled with alkaline solution to remove sulfur dioxide, and then enters the MEA absorption tower for absorption through the flue gas fan. The residual gas is discharged into the atmosphere. At this time, the MEA in the absorption tower absorbs CO₂ into a rich liquid and recovers energy through the lean rich heat exchanger.
After entering the analysis tower, CO₂ is analyzed, and the MEA in the analysis tower releases CO₂ into a lean liquid. The lean liquid is pumped into the lean rich heat exchanger for energy recovery, and then cooled back to the absorption tower for absorption, completing the cycle.
The CO₂ gas released from the analysis tower is cooled by a CO₂ cooler and enters the potassium permanganate tower for purification. The purified CO₂ gas is compressed to 16 bar by a secondary CO₂ compressor, dehydrated and dried to a dew point of -60 ℃, and then adsorbed by activated carbon to remove odors. It is then cooled to -30 ℃ by a CO₂ tube heat exchanger for liquefaction.
Matching CO₂ tube heat exchanger liquefaction freezer with R22 as refrigerant, automatically controlling CO₂ liquefaction temperature.
Liquid CO₂ is stored in insulated CO₂ storage tanks through cryogenic liquefaction.
Example: Production capacity: 40TPD consumption
Electricity: 400KW/H
Potassium permanganate: 0.44kg/hr
Cooling water: 1.50m3/hr
Water consumption of washing tower: 0.01m3/hr
Steam: Pressure: 4-5 bar
Temperature: 170-180 ° C
Steam volume: 2.100kg/hr
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