What are the centrifugal compressors in the chemical industry?

What are the centrifugal compressors in the chemical industry? Centrifugal compressor is the “gas heart” of chemical plant. In continuous processes such as ethylene cracking, synthetic ammonia, methanol, air separation, and natural gas pressurization, it is almost responsible for the stable pressurization of large-flow process gas. API617 is the most commonly cited design and manufacturing standard for process centrifugal compressors in the petrochemical and natural gas industries. Understanding its classification logic is the first step in scientifically selecting a model.
Introduction of Turbo-Tech, classification of centrifugal compressors in the chemical industry
Ⅰ. According to the compression medium: air compressor and process gas compressor
1. Centrifugal air compressor/nitrogen compressor: the medium is air, nitrogen and other conventional gases, used for air separation units, instrument gas sources, aeration, biological fermentation, etc.
2. Process gas compressor: The medium is natural gas, olefins, hydrogen, carbon monoxide, carbon dioxide, chlorine, vinyl chloride, hydrogen chloride, etc. This type of model has significantly improved requirements for impeller material, shaft seal form (such as dry gas seal), and explosion-proof level, and is the core equipment for petrochemical industry, coal chemical industry, and natural gas processing.
Ⅱ. According to the number of grades and pressure grades
Single stage: Only one stage impeller, simple structure, short flow channel, small loss, suitable for medium and low pressure large flow rate.
Multi-stage: two or more impellers are connected in series, and intercoolers are equipped between stages to control temperature rise, covering low pressure to ultra-high pressure. Typically used for synthetic ammonia, natural gas pressurization, high-pressure polyethylene, etc.
Ⅲ. Typical application scenarios in the chemical industry
Ethylene plant: cracking gas compression, propylene and hydrocarbon refrigeration compression, a single million-ton ethylene plant is usually equipped with 3-5 centrifugal compressors.
Synthetic ammonia/fertilizer: nitrogen, hydrogen nitrogen, syngas compression and process cycle require long-term reliable operation and precise anti-surge control.
Methanol and syngas: The medium contains CO, and the selection must focus on analyzing the gas composition, molecular weight, suction temperature, pressure ratio and working condition fluctuation range.
Air separation unit: Main air compressor (MAC), air/nitrogen supercharger, circulating nitrogen compressor, instrument air compressor constitute a complete compression system.
Emerging scenarios: carbon dioxide capture, hydrogen liquefaction, and air energy storage put forward higher requirements for explosion-proof, low noise, and continuous operation.
Ⅳ. Turbo-Tech centrifugal compressors are widely used in the chemical industry
Turbo-Tech Compressor Wuxi Co., Ltd. is a high-tech enterprise focusing on the R&D and manufacturing of centrifugal process gas compressors and other products. It has established provincial-level process compressors and large-scale centrifugal compressor engineering technology research institutions. Its products have passed ISO9001, TüV oil-free certification, CQC, CE and other qualifications.
Turbo-Tech centrifugal compressor core product matrix:
Series Flow Range Pressure Range Medium and Scenario
Ti series (universal type) 1200-24000Nm3/h0.06-1.6 MPa (G) air, nitrogen; Food, electronics, textiles, biological fermentation and other small and medium-flow oil-free scenarios. After aerodynamic design optimization, the efficiency is 3-6% higher than that of the model, the degree of modularization is high, and the delivery cycle is short;
Mn (H) series (large high pressure) 1200-600000Nm3/h0.12-16.0 MPa (G) air, nitrogen, etc.; Large-scale air separation, petrochemical, air energy storage, wind tunnel experiments. Public information shows that it can achieve five-axis ten-stage compression, the exhaust pressure of a single unit reaches 16MPa, and the power of a single unit exceeds 60MW;
Ra series (process gas) 1200-600000Nm3/h0.25-40.0 MPa (G) natural gas, olefins, hydrogen, CO2, CO, chlorine, vinyl chloride, hydrogen chloride, etc.; Designed and manufactured according to API standards, it has been used in petrochemical, coal chemical, natural gas, and carbon capture;
The above is the introduction of “What are the centrifugal compressors in the chemical industry?”, the selection of centrifugal compressors in the chemical industry is essentially a four-dimensional matching of “medium-pressure-flow-structure”. Turbo-Tech uses three series of Ti, Mn (H), and Ra to cover the entire scene from small and medium flow oil-free air compression to 40MPa process gas compression. It is one of the solutions worth including in the comparison and selection in localization substitution.