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Vacuum four-column differential pressure thermal coupling device and method for refining of crude phenol

A differential pressure thermal coupling, crude phenol technology, applied in the field of coal chemical industry, can solve the problems of high energy consumption, complex operation, low product purity, etc., and achieve the effect of high product recovery rate, good product purity and yield, and saving heating load.

Inactive Publication Date: 2016-10-26
CHANGLING PETRO CHEM ENG DESIGN
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Problems solved by technology

However, both of these two processes have obvious limitations. The batch rectification method has disadvantages such as low product purity and complicated operation. However, due to the small difference in boiling points between these components, the continuous rectification method requires extremely high Energy consumption is required to obtain ideal product purity and yield

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  • Vacuum four-column differential pressure thermal coupling device and method for refining of crude phenol
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  • Vacuum four-column differential pressure thermal coupling device and method for refining of crude phenol

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] figure 1 Schematically shows a vacuum four-tower differential pressure thermal coupling method and device for refining crude phenol according to the present invention.

[0034] A kind of vacuum four-tower differential pressure thermal coupling method for refining crude phenol provided in this embodiment includes:

[0035] The phenol tower connected to the external crude phenol extraction device through a pipeline, the top of the phenol tower 1 is connected with a phenol rectification combination through a pipeline, and the phenol rectification combination includes a phenol tower cooler 21 connected in sequence by a pipeline provided , the phenol tower reflux tank 9 and the phenol tower heavy reflux pump 13, the phenol tower reflux tank 9 is also connected with the phenol tower vacuum pump 17, and the output end of the phenol tower heavy reflux pump 13...

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Abstract

The invention discloses a vacuum four-column differential pressure thermal coupling device and method for refining of crude phenol. The invention is characterized in that through the crude phenol refining method and device with high performance, energy efficiency and high product recovery rate, it is possible to obtain products such as high-purity phenol, o-cresol, m-p-cresol, and mixed xylenol and tricresol; the invention has the advantages that a product segmenting line is designed by using stable and reliable continuous rectifying process, operation conditions of designed by using boiling point differences and ratio of various components in the crude phenol so as to meet the vacuum thermal coupling process, the method can save higher than 70% of cooling load and higher than 70% of heating load when compared to an existing mainstream continuous rectifying process, better product purity and yield can be achieved, and the method is a highly competitive and advantageous process.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to a vacuum four-tower differential pressure thermal coupling device and a method thereof for refining crude phenol. Background technique [0002] Phenolic compounds are the products of thermal cracking of coal. Coal cracking is also called coal dry distillation, which can produce gas, coal tar and coke, etc. It can be divided into several technologies according to the temperature of dry distillation. The projects for hydrogenation to prepare gasoline and diesel are currently the most enthusiastic about construction. However, with the global economic downturn and crude oil prices continuing to run at a low level, the pace of construction of domestic medium and low temperature coal tar hydrogenation to produce gasoline and diesel projects has gradually slowed down, and how to process a large amount of coal tar in the upstream and increase efficiency and benefit is currently attr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/10B01D3/14B01D3/42C07C39/04C07C39/07C07C37/74
CPCB01D3/10B01D3/146B01D3/42C07C37/74C07C39/04C07C39/07
Inventor 杨劲匡晓辉王萌李根忠吴彬
Owner CHANGLING PETRO CHEM ENG DESIGN
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