Our company’s food-grade carbon dioxide production technology, which complies with international quality standards, holds more than 30 national patents. It has been designated twice by the Ministry of Science and Technology as a key project under the National Technology Innovation Fund, and its core equipment has been listed as a designated product by the China Petroleum and Chemical Engineering Design Association. The technology has passed provincial-level appraisal, with the conclusion that it is “domestically leading and internationally advanced.”
We possess experience in the design, manufacture, and installation of over 200 sets of high-purity or food-grade carbon dioxide production units, which are widely applied in various industries—including coal chemical, petrochemical, power generation, ethanol, building materials, ethylene, steel, and oil and gas fields—for the recovery of carbon dioxide gas at different concentrations. The largest single-unit capacity has reached 600,000 tons per year. Additionally, the company has successfully developed compact, complete sets of equipment for producing 50–500 kg/h of food-grade liquid CO₂ via the combustion of carbon-containing feedstocks, as well as CO₂ equipment meeting electronic-grade quality standards.
Technical Features:
1. High Product Quality Standards
The units are designed to produce food-grade liquid CO₂ in accordance with international high-purity CO₂ standards. Product quality adheres to the standards of the International Society of Beverage Technology (ISBT) or the national standard “Food Additive Liquid Carbon Dioxide” (GB 1886.228-2016), with all indicators—including total sulfur, total hydrocarbons, ethanol, acetaldehyde, and aromatic hydrocarbons—within the specified limits.
2. Advanced Processes and Diversified Purification Methods
① Tailored production processes are developed for CO₂ feedstocks with varying impurity levels, ensuring localized adaptation and customization. Purification methods are highly targeted, resulting in stable product quality, low energy consumption, high automation, and simple operation.
② New condensation equipment is employed to achieve significant energy savings and maximize liquefaction and condensation efficiency.
③ The configuration of the chiller system is optimized to improve refrigeration efficiency, resulting in energy savings and enhanced environmental sustainability.
④ To address the complex sulfur-containing components in the CO₂ feed gas, an effective desulfurization process is employed to efficiently remove H₂S, COS, CS₂, SO₂, thiophene, thiols, and thioethers, ensuring the product’s total sulfur content remains below 0.1 ppm.
⑤ Our patented hydrocarbon removal and purification technology is the most effective method for treating CO₂ gas containing hydrocarbons, alcohols, and aldehydes. Utilizing the principle of catalytic oxidation and incorporating our two patented technologies—the hydrocarbon removal process and the hydrocarbon removal and refining tower—it achieves the most thorough removal of harmful hydrocarbons, benzene, aldehydes, alcohols, and various oxygen-containing organic compounds from CO₂. The patented equipment features a rational design, stable operation, and efficient energy utilization, enabling self-thermal equilibrium operation without electricity consumption. The catalyst has a service life of over 4 years. This dehydrocarbonization process is environmentally friendly, producing no waste gases, liquids, or solids.
⑥ Proprietary composite purification tower equipment requires no external power source and features self-reflux. The liquid CO₂ distillation process consumes no power, the system’s vented air has low CO₂ content, and product yield is high.
3. Advanced and comprehensive testing methods ensure stable and reliable product quality
In addition to standard testing methods, the system is equipped with analytical instruments for online analysis of total sulfur, total hydrocarbons, oxygen content, and moisture. This ensures effective control over high-purity standards and compliance with factory inspection requirements set by national standards and international beverage associations.
4. The unit features a high degree of automation, enabling full DCS or PLC control.
5. All equipment is domestically manufactured, auxiliary materials are readily available on the domestic market, and the project features a short construction cycle, low investment costs, and high efficiency.
