Energy recycling method for process for preparing propylene from oxygenated compounds

• Main Authors: JIANG YUNTAO, WANG JINGDAI, LU FEIPENG, YANG YONGRONG, YAN LIXIA, LIAO ZUWEI, FENG XIANG, HUANG ZHENGLIANG, JIANG BINBO
• Format: Patent
• Language: Chinese; English
• Published: 08.10.2014
• 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 invention discloses an energy recycling method for a process for preparing propylene from oxygenated compounds, for mainly solving the problems that in the prior art, a heating furnace is high in heat load, low in heat exchange depth and low in efficiency level. The adopted technical scheme comprises the following steps: (1) desorbing micromolecule organic acid from an oxygenated compound prepared propylene reactor outlet product by using a deacidification reactor, so as to obtain a high temperature material flow I; (2) compressing and heating the high temperature material flow I, so as to obtain a high temperature material flow II; and (3) sequentially feeding the high temperature material flow II into a raw material gas preheater, a methanol gasifier and a circulation water preheater for respectively preheating a raw material gas, gasifying methanol and preheating circulation water. The method saves the energy consumption of a heating furnace of a conventional process and improves the process efficacy l