Method and device for separating solvent in nine-tower continuous rectification method

A rectification method and solvent technology, applied in the field of fine chemical product preparation, can solve the problems of different operating conditions, product quality, energy consumption in the production process, and different separation methods, achieving high separation efficiency and purity, convenient operation, The effect of smooth production operation

CN104844437AInactive Publication Date: 2015-08-19LIAONING PROVINCE PETROLEUM CHEM IND PLANNING&DESIGNING INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-08-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the field of the preparation of a fine chemical product, and particularly relates to a method and a device for separating solvent in a nine-tower continuous rectification method. By utilizing different boiling points of different components in the solvent, the components in the solvent are respectively and sequentially rectified to obtain isolates. The device is relatively large in capacity, convenient to operate, capable of bearing large material volume fluctuation and stable to produce. The separation efficiency and purity of acetone, ethanol and butanol are relatively high, the solvent is circularly recovered and purified, and the waste of the product can be avoided. The environmental pollution problem is avoided, the produced waste fermented liquid and the waste fermented gas are recovered, and the environmental pollution can be avoided.
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Description

technical field

[0001] The invention belongs to the field of preparation of fine chemical products, and more specifically relates to a method and a device for separating solvents by nine-tower continuous distillation. Background technique

[0002] In the 21st century, with the development of the world economy, the demand for oil is rapidly expanding. As a strategic material and non-renewable energy, the price of oil continues to rise, which drives the price of acetone and butanol to rise, making acetone produced by biological fermentation , butanol and ethanol have regained market competitive advantages, their economic benefits are objective, and their development prospects are good.

[0003] The multivariate mixture after continuous fermentation has only 1.8-2.1% solvent, and most of the rest is water, as well as solids and organic matter. At present, the separation of the total solvent of acetin and butyl is carried out by distillation, but due to the different separation...

Examples

Embodiment 1

[0027] The fermented beer enters the beer tower, first passes through the condenser at the top of the beer tower to exchange heat with the tower top gas to 90°C, then enters the middle of the beer tower for distillation, steams with 40-50wt% solvent content from the top of the tower, and steam condenses Finally, it flows into the reflux tank in the beer tower, and then the mixed liquid is pressurized by the reflux pump, and the liquid accounting for 40-55% of the total weight of the mixed liquid is sent to the top of the tower for reflux, and the remaining mixed liquid is sent to the middle of the ethylene-propane tower As feed; the temperature at the bottom of the mash tower is 106°C, and the pressure is 0.2vg / cm 2 The temperature in the tower is 100°C, and the temperature at the top of the tower is 94°C; the remaining waste mash separated in the mash tower is sent to the continuous elimination batching, and the uncondensed tail gas is sent to the tail gas tower, and the solve...