Comprehensive technology for recovering carbon dioxide from industrial waste gas

Product and technology introduction:

Many industrial production waste gases contain a certain concentration of carbon dioxide, which are currently discharged into the atmosphere. It has not only caused serious air pollution, formed a terrible greenhouse effect, but also wasted very precious carbon resources.

This technology is to develop a complete set of carbon dioxide purification technologies for recovering carbon dioxide from different gas sources, all of which meet national food grade (99.95%) standards.

The specific categories are as follows:

Carbon dioxide industrial gas source CO2 content recovery method product purity
Mine gas, boiler, cement plant, steel mill flue gas 10~18% chemical absorption method 99.95%
Lime kiln, magnesia kiln, shift gas, borax carbon decomposition tail gas 20～40% Pressure swing adsorption method 99.95%
Oilfield gas, grain fermentation gas 60~85% Adsorption distillation method 99.95%
Hydrogen production, decarburization of synthetic ammonia, ethylene oxide by-product gas 85~95% Low pressure distillation 99.95%
This technology has passed the ministerial level appraisal and is rated as internationally leading level. The industrial devices built based on this technology have been adopted by 30 factories in Beijing, Liaoyang, Dalian, Anshan, Dandong, etc., creating very considerable economic and social benefits for related enterprises.

Application scope and production conditions:

This technology can be used for recycling wherever there is a source of carbon dioxide emissions as mentioned above. Purified carbon dioxide has a wide range of uses and the market is difficult to saturate. Mainly include the following aspects:

Grade and concentration Application areas:

Ordinary grade 95~98% oil field gas injection and oil production, agricultural gas fertilizer, controlled atmosphere preservation, borax carbonolysis reaction
Industrial grade 99.5% metal protection welding, mechanical molding, dry ice
Synthetic grade 99.5% methanol, ethanol, urea, soda ash, carbon amine, dicyandiamide, propylene carbonate, etc.
Food grade 99.95% beer beverage filling, dry ice food storage and transportation, pharmaceutical storage
High purity grade 99.99% pharmaceutical, electronic, biological, supercritical extraction

Carbon Dioxide Production Requirements and Technical Considerations

1. For units that have their own gas source and want to produce carbon dioxide products, the technical plan, equipment investment and floor space must be determined based on the gas source composition, product purity, production scale and other specific conditions;

2. Units that plan to introduce technology and production equipment only need basic conditions such as on-site installation of small chemical equipment, process piping, and power assembly. It is best to have a 100m2 factory building, small transportation vehicles and other conditions.

Obtained patents and other intellectual property rights:

1. Patent 200710011508.1 Composite decarbonization solution for carbon dioxide recovery
2. Patent 200810010905.1 Carbon dioxide purification device with adsorption distillation technology

Scale, investment, and cost estimation:

Producing carbon dioxide yourself: a production scale with an annual output value of 10 million yuan, equipment investment of about 2.6 million yuan; production equipment unit: building a set of production equipment for others with a cost of 2.6 million yuan, and an investment of 170,000 yuan in tool fees.

Self-produced carbon dioxide: For gas sources with a carbon dioxide content of less than 60%, the production cost is 300 to 320 yuan per ton of food-grade products; for gas sources with a carbon dioxide content of more than 90%, the production cost is 120 to 140 yuan per ton of products; production equipment is exported : The production cost of a complete set of equipment is about 70% of the sales price, which is determined by the specific situation.

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Food carbon dioxide recovery device