Rückgewinnungsanlagen für CO2 als Nebenprodukt aus Industrieprozessen

ASCO’s innovative CO₂ Gas Recovery technology turns your vented by-product gas into profitable CO₂.

Various industrial operations including manufactures of ammonia, hydrogen and fertilizers offer a great opportunity for all interested parties to recover the by-product CO₂ gas. Idea of recovering gas from these sources allows for an additional revenue stream plus reducing emissions to the atmosphere.

ASCO by-product CO₂ gas recovery plants enhance the overall concept for your recovery opportunity considering the following key benefits:

• ASCO’s CO₂ gas recovery plants offer recovery from a variety of industrial vent sources;
• Our advanced state of the art technology is strategically positioned for lowest cost production/ton;
• The environmentally friendly technology – gas scrubbing, purifying, drying - eliminates chemical treatment and handling;
• Totally automatic process – plant operations and liquid CO₂ tank system management;
• The CO₂ gas recovery system achieves liquid CO₂ purity of 99.998% from an inlet CO₂ gas source purity as low as 98.5%;
• Final liquid CO₂ quality exceeds international food and beverage standards.

General Process Description

CO₂ gas can be generated as a by-product of various industrial sources and as such can be reclaimed for feed to the ASCO CO₂ gas recovery system.

ASCO’s process flow is variable and subject to raw gas make up as well as process conditions.  With all variables considered ASCO could foresee requirements for either low pressure or high pressure scrubbing. Gas compression will be utilized to compress the CO₂ gas elevating the pressure to approximately 18 bar g. for CO₂ gas processing -- washing, purifying, drying and CO₂ gas condensing. Specially selected compressors offer the best in energy utilization, dry gas compression and ease of maintenance. 

Once compressed, CO₂ gas is treated for removal of impurities typical of these sources by high pressure high efficiency CO₂ gas washing (scrubbing) providing an effective removal rate for further purifying.

ASCO’s system design further enhances the gas quality by proper CO₂ gas purifying. This is accomplished by an activated desiccant bed for gas drying to a dew point of minus 40°C at pressure  (-62°C at atmospheric pressure) followed by carbon polish filter, again subject to raw gas and process conditions. Once the operation is completed, the final gas will be odour free, colour free, moisture free and taste free, preparing for the last stages of purification.

As a means of final purification the CO₂ gas is condensed (separation of non-condensable gases). CO₂ gas condensing is accomplished by use of an independent refrigeration system that liquefies CO₂ gas at approximately 18 bar g. and minus 24°C. The non-condensable gases present in the CO₂ gas are separated and purged from the system automatically and reused for regeneration gas within the plant.  

Liquid CO₂ leaving the CO₂ condenser flows by gravity to a liquid CO₂ purification system to achieve a final liquid CO₂ purity of 99.998%. Thereafter; high quality liquid CO₂ is pumped to a liquid CO₂ storage tank system for inventorying and further handling the liquid CO₂ be it for bulk supply, cylinder supply, dry ice supply for chilling or dry ice supply for blast cleaning.

ASCO welcomes the opportunity to assist you with your CO₂ system requirements and looks forward to hearing from you. Please contact us!