An Introduction to Our Company’s (Patented, Proprietary) Wound Tube Heat Exchanger

2024-09-27

Heat exchangers are indispensable pieces of equipment in industrial facilities. For many years, developed countries around the world have invested significant human and material resources in researching and developing heat exchangers that are highly efficient and compact in design. Currently, our company has developed coil-type heat exchangers in a variety of structural configurations. Due to their compact design, small footprint, and high heat transfer efficiency, as well as their ability to withstand high pressure, handle multi-stream heat exchange, and provide excellent thermal compensation, these heat exchangers have become the preferred critical process equipment in industries such as new energy, smelting, and petrochemicals—particularly in large-scale chemical and new energy facilities.

A New Process for Recovering Energy-Efficient Alcohol Fermentation Off-Gas to Produce High-Purity, Food-Grade CO₂

2024-09-27

During the fermentation process for producing ethanol from raw materials such as cassava and corn, large amounts of carbon dioxide are generated. Theoretically, the fermentation of starchy or sugary raw materials to produce 1 ton of ethanol releases 0.956 tons of carbon dioxide gas. For large and medium-sized ethanol producers, the volume of CO₂ released is clearly substantial. Recovering and processing this CO₂ into high-purity liquid CO₂ enables the production of downstream products such as solid dry ice and chemical feedstocks. CO₂ is a critical raw material in various industrial sectors. Recovering CO₂ not only reduces environmental pollution and generates economic and social benefits but also mitigates atmospheric pollution and the greenhouse effect.

A New Technology for Producing Green Methanol by Coupling Biomass Gasification with Water Electrolysis

2024-09-10

An important synthetic pathway for the industrial production of green methanol involves a process in which hydrogen is produced via water electrolysis using electricity generated by a hybrid wind-solar power system, and then combined with CO₂ to synthesize low-energy-consumption green methanol. This process combines wind and solar energy—two renewable energy sources—and converts them into chemical energy stored in methanol through a series of steps. The hybrid wind-solar system produces no greenhouse gas emissions, significantly reducing the carbon footprint of methanol production. By directly harnessing wind and photovoltaic solar energy from nature to replace traditional fossil fuels, this approach helps alleviate the pressure of global warming. However, since wind and solar power are highly susceptible to weather conditions and cannot provide a continuous, stable energy supply 24 hours a day, and given the high costs of electricity and energy storage, the biomass gasification coupled with green electricity for methanol production can be adopted to address challenges such as the difficulties in hydrogen storage and transportation, as well as the chemical industry’s requirement for stable and continuous production.

New Technology for Producing Green Methanol via Dual-Reactor Biomass Gasification (Zero Carbon Emissions)

2024-09-10

There are two main industrial production routes for green methanol: First, the green methanol production process based on biomass gasification. This process converts biomass resources into clean energy methanol, aiming to reduce dependence on fossil fuels and promote the carbon cycle. Second, the production process that uses electricity generated by a hybrid wind-solar power system to electrolyze water and produce hydrogen, which is then synthesized with CO₂ to produce low-energy-consumption green methanol. This process combines wind and solar energy—two renewable sources—and converts them into chemical energy stored in methanol through a series of steps. However, current implementation requires the construction of energy storage and hydrogen storage systems. Since methanol synthesis operates as a continuous production line, but wind and solar power are highly susceptible to weather fluctuations and thus unstable—meaning they cannot provide a stable, 24-hour energy supply—this places high demands on energy storage systems and the flexibility of production operations.

CO₂ Production Technology—Double Column Distillation Process

2023-10-10

Carbon capture and utilization projects involve the collection, refining, and purification of low-, medium-, and high-concentration CO₂ from various industrial exhaust gases to achieve high purity (meeting industrial, food-grade, and electronic-grade standards). Distillation is an essential process for obtaining high-purity CO₂. For CO₂, impurities include light components with boiling points lower than CO₂, such as H₂, N₂, O₂, CO, and CH₄. Heavy components with boiling points higher than CO₂ include alcohols, aldehydes, heavy hydrocarbons, benzene, and vinyl chloride. Existing technologies primarily use physical adsorption with adsorbents to remove heavy components, followed by distillation to remove light component impurities. The removal of heavy components requires a large amount of adsorbent. Furthermore, due to the variety of impurities involved, this approach suffers from drawbacks such as the need for numerous types of adsorbents, a large volume of solid waste to be treated, and high costs.

A New Process for Producing High-Purity Food-Grade CO₂ from Alcohol Vapor

2023-10-10

Edible alcohol is primarily produced using starchy raw materials such as tubers, grains, and corn. Under the action of microorganisms, the starch is hydrolyzed into glucose, which is then further fermented to produce alcohol. Additionally, alcohol is produced through the fermentation of molasses and the fermentation of waste liquor from sulfite pulp. The vent gas generated during the alcohol fermentation process typically contains a carbon dioxide concentration of over 95% in the raw gas exiting the fermenter, with other impurities including alcohols, aldehydes, esters, and sulfides.

Process Characteristics of the Recovery of High-Purity Food-Grade CO₂ from EO/EG Unit Vent Gas

2023-10-08

Currently, the CO₂ vent gas generated by EO/EG units both domestically and internationally has a high carbon dioxide concentration, typically around 98% (dry basis). The gas contains no sulfur, but other impurities primarily consist of ethylene, ethylene oxide, and other hydrocarbons with carbon numbers greater than C₂. Since the boiling points of these impurities are similar to that of carbon dioxide and their molecular sizes are also comparable to CO₂, these hydrocarbons cannot be effectively removed through distillation, multi-stage distillation, or adsorption methods.

Technologies for the Recovery and Reuse of CO₂ from the Hydrogen Production Industries Using Methanol and Natural Gas

2023-10-08

Currently, the global hydrogen energy industry is experiencing rapid growth, with China being the world’s largest producer of hydrogen. In 2020, China’s hydrogen demand was approximately 33.42 million metric tons; this figure is projected to rise to 37.15 million metric tons by 2030, accounting for about 5% of final energy consumption. As the goals of carbon peaking and carbon neutrality draw nearer, the importance of hydrogen as a clean energy source is becoming increasingly evident. Aside from hydrogen production via water electrolysis, methods such as coal-based hydrogen production, coke oven gas-based hydrogen production, and hydrogen production via the cracking of natural gas (light oil) and methanol invariably generate large amounts of carbon dioxide tail gas during the hydrogen production process. If directly released into the atmosphere, this not only causes severe environmental pollution but also wastes valuable carbon resources. In response to this situation, our company has specifically developed proprietary new processes and technologies for the recovery and reuse of carbon dioxide tail gas from natural gas and methanol cracking for hydrogen production, thereby realizing a circular economy and turning waste into valuable resources.

New Technology for the Recovery and Recycling of Associated Gas CO₂ at Oilfield Wellheads

2023-07-14

Currently, most oilfields in China are utilizing CCUS projects to conduct large-scale secondary and tertiary oil recovery (e.g., Shengli Oilfield, Xinjiang Oilfield, etc.). As oil and gas fields enter the mid-to-late stages of development, many fields are actively upgrading their technologies to improve oil and gas recovery rates. Carbon dioxide (CO₂) flooding is a widely adopted reservoir recovery technique. When CO₂ dissolves in water within the formation, it increases the water’s viscosity by 20% to 30%. When dissolved in oil, carbon dioxide causes the crude oil to expand in volume, reduces its viscosity by 30%–80%, and lowers the oil-water interfacial tension. This facilitates increased oil production rates, improves oil displacement efficiency, and aids in the recovery of residual oil. CO₂ EOR typically increases crude oil recovery rates by 7%–15% and extends the production life of oil wells by 15–20 years. In large-scale CO₂ flooding operations, the associated gas produced during the process contains a significant proportion of CO₂. By recovering, reinjecting, and utilizing this CO₂ directly at the wellsite, a closed-loop CO₂ recycling system can be achieved. This not only significantly reduces greenhouse gas emissions into the atmosphere but also substantially lowers the costs associated with purchasing and transporting CO₂ for flooding, resulting in savings of 30%–60% on CO₂ raw material and transportation expenses.

Letter of Recommendation from the China Industrial Gases Association Regarding Food-Grade CO₂ Production Processes and Key Equipment

2013-09-18

Letter of Recommendation from Coca-Cola Regarding the Purification Process for Food-Grade Liquid CO₂

2013-09-18

Food-Grade CO₂ Production Technology Meeting International Quality Standards

2023-09-06

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.”

GB 1886.228-2016 National Food Safety Standard: Food Additives—CO₂

2020-03-17

Catalytic Oxidation Hydrocarbon Removal and Purification System

2022-04-12

The principle of catalytic oxidation purification is as follows: under the action of an active catalyst (a precious metal catalyst) and at a specific temperature, combustible components in CO₂ gas—such as hydrocarbons, CH₃OH, H₂, and CO—react with oxygen to form CO₂ and H₂O. The purification level reaches the ppb range, ensuring that product specifications fully comply with the standards of the International Society of Beverage Technology (ISBT), the Chinese National Food Safety Standard “Food Additives—Carbon Dioxide” (GB 1886.228-2016), as well as the standards of “Coca-Cola” and “Pepsi-Cola.”

GB/T 23938-2021 High-Purity CO₂

2020-03-17

Multi-stage liquefaction distillation system

2022-04-12

The process employs a two-stage liquefaction and single- or multi-stage purification process. The two-stage liquefaction utilizes the operational characteristics of the refrigeration unit to operate under two distinct operating conditions, thereby fully leveraging the compressor’s efficiency and reducing the refrigeration unit’s power consumption. Compared to traditional liquefaction processes, refrigeration power consumption can be reduced by 25%, while simultaneously improving the CO₂ liquefaction rate—that is, increasing product yield and output—with a product yield of over 92%.

GB/T 6052-2011 Industrial Liquid CO₂

2020-03-17

GB/T 51316-2018 Engineering Design Standard for CO₂ Capture and Purification from Flue Gas

2023-09-05

Ultra-High-Purity (Electronic-Grade) CO₂ Technology

2019-12-19

Since the 1990s, with the rapid development of high-tech industries in China, high-tech fields such as integrated circuits (ICs), light-emitting diodes (LEDs), solar cells, and optical fibers have experienced rapid growth. Against this backdrop, ultra-high-purity (electronics-grade) carbon dioxide offers vast application potential. It is primarily used in high-tech fields such as lasers, the electronics industry, reactor gas coolants, critical extraction in medicine, and scientific research. In the production processes of high-tech products, ultra-high-purity (electronics-grade) carbon dioxide gas plays a crucial role in determining the final product quality, and its quality control standards are extremely stringent. Currently, products with a purity of ≥99.995% are referred to as high-purity CO₂ products in the domestic market. However, these products contain relatively high levels of impurities such as moisture and oxygen, resulting in a significant gap compared to high-purity CO₂ products from abroad. Consequently, the application of domestic high-purity carbon dioxide in high-end technology fields is significantly limited.

Adsorption drying

2022-04-12

The installation of an adsorption dehydration unit, which utilizes multifunctional molecular sieve adsorbents for dehydration, facilitates further purification of the CO₂ gas. The adsorbent regeneration process employs an environmentally friendly, fully enclosed recycling regeneration process that directly utilizes the thermal energy from catalytic hydrocarbon removal. This method features low energy consumption and produces no exhaust emissions, ensuring a stable CO₂ recovery rate for the unit. The regenerated gas discharged consists solely of humid air and a small amount of CO₂, fully complying with the emission requirements of the “Petrochemical Industry Pollutant Emission Standard GB 31571-2015.”