Low energy consumption green technology for aromatics
The low-energy-consumption green aromatic hydrocarbon technology suite was independently developed by Zhejiang Dongjiang Green Petrochemical Technology Innovation Center Co., Ltd. Currently, this technology mainly includes: low-temperature heat utilization and process condensate recovery technology for aromatic hydrocarbon units, and combined technology for liquid-phase isomerization and deethylation isomerization units.
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Low energy consumption green technology for aromatics
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Results Overview
The low-energy consumption aromatic hydrocarbon green technology suite was independently developed by Zhejiang Dongjiang Green Petrochemical Technology Innovation Center Co., Ltd. Currently, this technology mainly includes: low-temperature heat utilization and process condensate recovery technology for aromatic hydrocarbon units, and a combination technology of liquid-phase isomerization and de-ethyl isomerization units. The process technology flow is as follows:
- Low-temperature Heat Utilization and Process Condensate Recovery Technology for Aromatic Hydrocarbon Units
- Combination Technology of Liquid-Phase Isomerization and De-ethyl Isomerization Units
Main Technological Characteristics
- Recovery of low-temperature heat from aromatic hydrocarbon units. By producing ultra-low pressure steam and then upgrading it through a compressor, the problem of insufficient cold sources is solved. For example: 0.1 MPa is increased to 0.5 MPa, or 0.5 MPa is increased to 2.5 MPa. 2.5 MPa superheated steam can replace the medium-pressure steam of 3.5 MPa temperature reduction and pressure reduction in the unit.
- For long-distance transportation of low-temperature heat from the unit, demineralized water can be used as the heat transfer medium to solve the problem of long-distance steam transportation.
- A large amount of high-temperature, clean process condensate exists in aromatic hydrocarbon units. Directly using it in a high-pressure deaerator reduces the cost of process condensate treatment and, by saving high-temperature steam, lowers production costs.
- The combined liquid-phase isomerization and de-ethyl isomerization unit can increase the xylene yield to over 99.3%, while reducing unit energy consumption by more than 5%.
Application Achievements
Zhongjin Petrochemical Co., Ltd. intelligent thermal island waste heat recovery unit (2025)
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