THE INDICATORS ANALYSIS OF MEDIUM PRESSURE MULTIMODE ASU WITH THE EXPANDER-COMPRESSOR UNIT OF THREE-SHAFT DESIGN
DOI:
https://doi.org/10.18198/j.ind.gases.2014.0728Keywords:
Air separation unit, Expander-compressor unit, Turbo reducer, Compressor stage, Expander stages, Expansion work, Off-design behavior, Optimization, Specific energy consumptionAbstract
When making a modern liquid and gas-liquid air separation units (ASU) on the basis of medium-pressure cycles a special attention is paid to the point of ensuring their efficiency. The scheme of ASU with the expander-compressor unit (ECU) of multi-shaft design in which the expansion work of a part of the processed air is converted into an additional refrigerating capacity are considered. In ECU a turbo reducer is used to ensure the optimal rotation frequency of the compressor stage (CS) shaft which is mechanically connected with the expander stages of a high (ES1) and low (ES2) pressure of the unit. A modal and structural optimization of ECU used in the scheme of ASU has allowed to estimate the marginal indices of the unit in the calculated and off-design operation modes. The studies showed that ASU that had produced over 1000 kg/h of liquid oxygen could efficiently produce both liquid oxygen or nitrogen and gaseous products under pressure using for that only machines with dynamic action principle.
References
Bogushevsky V.S., Sukhenko V.Y., Sergeeva E.A. (2011). Mathematical model of management in the blow mode converter smelting // Izvestiya vuzov. Chernaya metallurgiya. [Transactions of the Universities. Ferrous Metallurgy]. — No. 8. — P. 24-25. (Rus.).
Skorodumov B.A., Karpov V.N., Pisarev Yu.G. (2002). Air separation plants of new generation// Tekhnicheskie Gazy. [Industrial Gases]. — No. 4. — P. 23-30. (Rus.).
Xu J. (2011). Selection of inner compression process for chemical type air separation plant//Cryogenic Technology. — V. 7. — P.3.
Li T., Roba T., Bastid M., Prabhu A. (2011). Real Time Optimization of Air Separation Plants//Proceedings of ISA Automation Week 2011. — P.1-6
Schmidt S., Clayton R. (2013). Dynamic Design of a Cryogenic Air Separation Unit. — Lehigh University. — 41 p.
Lavrenchenko G.K., Plesnoy A.V. (2013). Increasing the efficiency of the gas-expansion machine-compressor units used in the structure of the air-separating installations of medium pressure// Tekhnicheskie Gazy. [Industrial Gases]. — No. 4. — P. 18-23. (Rus.).
Lavrenchenko G.K., Plesnoy A.V. (2014). Development of a liquid medium pressure ASU based on dynamic action machines// Tekhnicheskie Gazy. [Industrial Gases]. — No. 2. – P. 30-36. (Rus.)
Lavrenchenko G.K. Plesnoy A.V. (2013). The optimization of the multi-shaft expander-compressor unit of the air separation unit of medium capacity// Tekhnicheskie Gazy. [Industrial Gases]. — No. 5. — P.15-24. (Rus.).
Oxygen. Referense Book. V. II. (1973)/ Under the editorship D. L. Glizmanenko. — Moskow: Metallurgy. — 464 p. (Rus.).
Lavrenchenko G.K., Plesnoy A.V. (2013). Creation of low-pressure oxygen ASU for use in liquid or gas-liquid modes// Tekhnicheskie Gazy. [Industrial Gases]. — No. 6. — P. 41-47. (Rus.)
Epifanova V.I. (1998). Compressor and expander radial turbo machine. — Moskow: Bauman Moskow State Technical University. — 624 p. (Rus.).
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