Device for heat recovery process at tower top of ethylbenzene/styrene separation tower

• Main Authors: LIU SHANBING, CONG LIN, QIU RUOPAN, GUO DONGRONG
• Format: Patent
• Language: English
• Published: 22.10.2014
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; ORGANIC CHEMISTRY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The utility model belongs to the technical field of heat recovery of a tower top of an ethylbenzene/styrene separation tower, and in particular relates to a device for a heat recovery process at the tower top of the ethylbenzene/styrene separation tower. The device comprises an ethylbenzene/styrene separation tower, wherein a tower bottom reboiler is mounted at the bottom of the ethylbenzene/styrene separation tower; the top of the ethylbenzene/styrene separation tower is communicated with a tower top condenser through a pipeline; an outlet in the top of the tower top condenser is connected with a compressor which is communicated with the tower bottom reboiler; the outlet of the tower bottom reboiler is communicated with a working medium storage tank which is communicated with a bottom inlet of the tower top condenser through a pump. As the vaporization temperature of a working medium is lower than that of ethylbenzene, the vacuum degree for the vaporization of the working medium is far lower than the pressure of the tower top, and thus the inlet pressure of the compressor is higher than the pressure of direct compression of gas at the tower top, i.e., the inlet flow of the compressor is far less than the flow of the gas directly compressed at the tower top. Therefore, only one screw compressor is required by a styrene device capable of producing 150000 tons of styrene per year. As a result, the equipment investment is greatly lowered.