Heat pump driven toluene column fractionation device and method
A heat pump-driven, fractionation device technology, applied in the field of aromatics separation, can solve the problems affecting the colorimetric index of acid washing of benzene and toluene products, etc.
Active Publication Date: 2021-09-14
SINOPEC ENG +1
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Problems solved by technology
The mixed aromatics in the extractive distillation part may contain traces of olefins and other impurities, which will significantly affect the acid wash color index of benzene and toluene products
Method used
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[0025] Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein.
[0026] refer to figure 1 According to the heat pump driven toluene tower fractionation device of the present invention, it includes: a toluene tower 1; a compression preheater 9 connected to the top of the toluene tower through a first shut-off valve 8; a compressor 10 connected to the compression preheater 9; The heat pump reboiler 11 is connected to the compressor 10 and the compression preheater 9, and is connected to the bottom of the toluene tower; the pressure relief valve 12 is connected to the compression preheater 9; the top heat output heat exchanger 2 is passed through the second stop valve 13 Connected to the pressur...
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The invention provides a heat pump-driven toluene tower fractionation device and method. The device includes: a toluene tower; a compression preheater connected to the top of the toluene tower through a first cut-off valve; a compressor connected to the compression preheater; a heat pump reboiler connected to the compressor and the compression preheater and connected to the toluene The bottom of the tower; the pressure relief valve is connected to the compression preheater; the heat output heat exchanger at the top of the tower is connected to the pressure relief valve through the second stop valve, and the top of the toluene tower is connected to the third stop valve; the waste heat recovery heat exchanger at the top of the tower is The tower top heat output heat exchanger is connected; the tower top reflux tank is connected with the tower top waste heat recovery heat exchanger; the tower top reflux pump is connected with the tower top reflux tank and the top of the toluene tower; the tower bottom reboiler is connected with the bottom of the toluene tower. The present invention uses a toluene tower to separate toluene and C8-C9 aromatics, and the toluene tower is driven by a heat pump to reduce the energy consumption of a single-tower system by 50%-70%, which has obvious advantages in energy saving and consumption reduction.
Description
technical field [0001] The invention relates to the technical field of separation of aromatics, and more specifically, to a heat pump-driven toluene tower fractionation device and method. Background technique [0002] Aromatics extraction is an important device for petrochemical enterprises to separate aromatics from reformed products. Liquid-liquid solvent extraction and solvent extraction distillation are widely used in industrial production. Among them, domestic petrochemical companies mostly use extractive distillation technology for aromatics recovery, and its working principle is to use highly selective solvents to change the relative volatility of feed components. In the mixture of aromatics and non-aromatics, due to the action of solvent, the relative volatility of non-aromatic components is increased. This promotion allows non-aromatic components to be evaporated to the top of the column in a traditional distillation column, while aromatics enriched at the bottom o...
Claims
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IPC IPC(8): B01D3/00B01D3/14B01D3/32B01D3/42C07C7/04C07C15/06C07C15/085C07C15/02C07C15/08
CPCB01D3/007B01D3/14B01D3/322B01D3/42C07C7/005C07C7/04C07C15/06C07C15/085C07C15/02C07C15/08Y02P20/10Y02P20/50Y02P70/10
Inventor魏志强孙丽丽范传宏袁忠勋张方方吕程
OwnerSINOPEC ENG